CHARLES RIVER LABORATORIES INC
S-1, 1999-12-01
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   As submitted to the Securities and Exchange Commission on November 30, 1999
                                                      Registration No. 333-
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                             -----------------------

                                    FORM S-1
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                             -----------------------

                        Charles River Laboratories, Inc.
             (Exact name of Registrant as specified in its charter)

       Delaware                           2836                    76-0509980
 (State or jurisdiction of     (Primary Standard Industrial    (I.R.S. Employer
incorporation or organization)  Classification Code Number)  Identification No.)

                                                        Thomas Ackerman
                                                    Chief Financial Officer
 251 Ballardvale Street                         Charles River Laboratories, Inc.
  Wilmington, MA 01887                               251 Ballardvale Street
     (978) 658-6000                                   Wilmington, MA 01887
                                                         (978) 658-6000

(Address, including zip code, and           (Name, address, including zip code,
telephone number, including area           and telephone number, including area
code, of Registrant's principal                code, of agent for service)
executive offices)

                             -----------------------

                                   Copies to:

  Richard D. Truesdell, Jr., Esq.                       Greg Ezring
       Davis Polk & Wardwell                         Latham & Watkins
       450 Lexington Avenue                          885 Third Avenue
     New York, New York 10017                    New York, New York 10022

                             -----------------------


     Approximate date of commencement of proposed sale to the public: From time
to time after the effective date.

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, please check the following box. [x]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement for the same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration number of the earliest effective registration statement for the
same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration number of the earliest effective registration statement for the
same offering. [ ]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

                         CALCULATION OF REGISTRATION FEE
<TABLE>

===================================================================================================================
                                                                  Proposed
                                                                   Maximum         Proposed
                                                                  Offering         Maximum           Amount of
              Title of Each Class                Amount to be       Price     Aggregate Offering    Registration
        of Securities to be Registered            Registered      Per Unit         Price(1)            Fee(2)
- -------------------------------------------------------------------------------------------------------------------
<S>                                               <C>                <C>         <C>                  <C>
13-1/2% Series B Senior Subordinated Notes
   due 2009....................................    $150,000,000       100%        $150,000,000        $41,700.00
===================================================================================================================
</TABLE>
(1)  Estimated solely for the purpose of computing the amount of the
     registration fee pursuant to Rule 457(f) under the Securities Act of 1933.

(2)  Calculated pursuant to Rule 457(f).

                             -----------------------


     The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the SEC, acting pursuant to said Section 8(a), may
determine.

================================================================================
<PAGE>



                                EXPLANATORY NOTE

     This Registration Statement covers the registration of an aggregate
principal amount of $150,000,000 of 13-1/2% series B senior subordinated notes
due 2009 of Charles River Laboratories, Inc. ("Charles River") (the "new notes")
that may be exchanged (the "exchange offer") for equal principal amounts of
Charles River's outstanding 13-1/2% series A senior subordinated notes due 2009
(the "old notes"). This Registration Statement also covers the registration of
the new notes for resale by Donaldson, Lufkin & Jenrette Securities Corporation
in market-making transactions. The complete prospectus relating to the exchange
offer (the "exchange offer prospectus") follows immediately after this
Explanatory Note. Following the exchange offer prospectus are pages relating
solely to such market-making transactions (the "market-making prospectus"),
including alternate front and back cover pages, an alternate "Risk Factors--No
public trading market for the new notes exist" section, an alternate "Use of
Proceeds" section and an alternate "Plan of Distribution" section. In addition,
the market-making prospectus will include references merely to "notes" instead
of to "old notes" and "new notes" and will not include the following captions
(or the information set forth under such captions) in the exchange offer
prospectus: "Summary--The Exchange Offer," "Summary--Consequences of Exchanging
Old Notes pursuant to the Exchange Offer," "The Exchange Offer" and "Material
United States Tax Consequences of the Exchange Offer." All other sections of the
exchange offer prospectus will be included in the market-making prospectus. The
market-making prospectus may also be used by DLJ Investment Partners, L.P., DLJ
Investment Funding, Inc., and DLJ ESC II L.P. to comply with their prospectus
delivery requirements under the Securities Act in connection with any resale
transactions.


<PAGE>



The information in this prospectus is not complete and may be changed. We may
not sell these securities until the registration statement filed with the
Securities and Exchange Commission is effective. This prospectus is not an offer
to sell these securities and it is not soliciting an offer to buy these
securities in any state where the offer or sale is not permitted.


                 SUBJECT TO COMPLETION, DATED NOVEMBER 30, 1999

PROSPECTUS

                        Charles River Laboratories, Inc.
                               Offers to Exchange
             13-1/2% Series A Senior Subordinated Notes Due 2009 for
               13-1/2% Series B Senior Subordinated Notes Due 2009
           which have been registered under the Securities Act of 1933

     We are offering to exchange an aggregate principal amount of up to
$150,000,000 of our new 13-1/2% series B senior subordinated notes due 2009,
which have been registered under the Securities Act of 1933 for our existing
13-1/2% series A senior subordinated notes due 2009. We issued units consisting
of the old notes and warrants to purchase common stock of our holding company in
a transaction exempt from registration under the Securities Act. We are
registering the warrants and the common stock into which the warrants are
exercisable on a separate "shelf" registration statement.

     The terms of the new notes are identical in all material respects to the
terms of the old notes, except that the new notes are not guaranteed by any
subsidiaries since the subsidiaries which guaranteed the old notes have been
merged into Charles River, and the new notes have been registered under the
Securities Act. In addition, the transfer restrictions and registration rights
relating to the old notes do not apply to the new notes.

     To exchange your old notes for new notes:

  o  You must complete and send the letter of transmittal that accompanies this
     prospectus to the exchange agent by 5:00 p.m., New York time, on          ,
     1999.

  o  If your old notes are held in book-entry form at The Depository Trust
     Company, you must instruct The Depository Trust Company through your signed
     letter of transmittal that you wish to exchange your old notes for new
     notes. When the exchange offer closes, your Depository Trust Company
     account will be changed to reflect your exchange of old notes for new
     notes.

  o  You should read the section called "The Exchange Offer" for additional
     information on how to exchange your old notes for new notes.

     See "Risk Factors" beginning on page for a discussion of the risk factors
that should be considered by you prior to tendering your old notes in the
exchange offer.

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of the securities or passed upon the
adequacy or accuracy of this prospectus. Any representation to the contrary is a
criminal offense.

     The date of this prospectus is                                    , 1999.

                                       iii


<PAGE>




                             -----------------------

                                TABLE OF CONTENTS

                             -----------------------

                                                                           Page
                                                                          -----


Summary.......................................................................1
Risk Factors.................................................................14
The Transactions.............................................................24
Use of Proceeds..............................................................27
Capitalization...............................................................28
Selected Historical Consolidated Financial Data..............................29
Management's Discussion and Analysis of
     Financial Condition and Results of
     Operations..............................................................31
Business.....................................................................43
Management...................................................................52
Executive Compensation.......................................................55
Security Ownership of Certain Beneficial Owners and Management...............58
Certain Relationships and Related Party
     Transactions............................................................59
Description of New Credit Facility...........................................61
Description of Notes.........................................................63
Certain United States Tax Consequences of the
     Exchange Offer.........................................................111
Plan of Distribution........................................................111
Legal Matters...............................................................112
Independent Accountants.....................................................112
Index to Unaudited Pro Forma Condensed
     Consolidated Financial Data............................................P-1
Index to Consolidated Financial Statements..................................F-1

                             -----------------------



FORWARD-LOOKING STATEMENTS

     This prospectus includes "forward-looking statements" including, in
particular, the statements about our plans, strategies and prospects under the
headings "Summary," "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and "Business," and in the Unaudited Pro Forma
Financial Information and the related notes. Although we believe that our plans,
intentions and expectations reflected in or suggested by such forward-looking
statements are reasonable, we can give no assurance that such plans, intentions
or expectations will be achieved. Important factors that could cause actual
results to differ materially from the forward-looking statements we make in this
prospectus are set forth in this prospectus, including under the headings "Risk
Factors," "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and "Business." All forward looking statements
attributable to us or persons acting on our behalf are expressly qualified in
their entirety by the cautionary statements and risk factors contained
throughout this prospectus.

 INDUSTRY AND MARKET DATA

     In this prospectus, we rely on and refer to information and statistics
regarding the research model and biomedical products and services industries,
and our market share in the sectors in which we compete. We obtained this
information and statistics from various third party sources, discussions with
our customers and/or our own internal estimates. We believe that these sources
and estimates are reliable, but we have not independently verified them and
cannot guarantee their accuracy or completeness.


<PAGE>



                                     SUMMARY

     References to the words "Charles River," "CRL," "Company," "we," "our," and
"us" refer only to Charles River Laboratories, Inc., its predecessors, its
subsidiaries, its affiliates and its joint ventures. References to "Holdings"
refers to Charles River Laboratories Holdings, Inc. This summary highlights
information contained elsewhere in this prospectus and may not contain all of
the information that is important to you. For a more complete understanding of
this exchange offer, we encourage you to read this entire prospectus carefully.

     Our fiscal year ends on the Saturday closest to December 31. Unless the
context indicates otherwise, whenever we refer in this prospectus to a
particular fiscal year, we mean the fiscal year ending in that particular
calendar year. When we refer to "pro forma" financial results, we mean the
financial results of Charles River and its subsidiaries on a consolidated basis
as if the Transactions (which we define on page 4) had occurred at the beginning
of the relevant time period.

                        CHARLES RIVER LABORATORIES, INC.

Overview

     We are a global market leader in the commercial production and supply of
animal research models for use in the discovery, development and testing of new
pharmaceuticals. We have expanded our core capabilities in research models to
become a leading supplier of related biomedical products and services in several
specialized niche markets. Our research model capabilities and biomedical
products and services, together with our global distribution network, allow us
to meet the extensive needs of our broad customer base. Our customers consist
primarily of:

   o large pharmaceutical companies, including the ten largest global
     pharmaceutical companies based on 1998 revenues

   o biotechnology, animal health, medical device and diagnostics companies

   o hospitals

   o academic institutions

   o government agencies

     Our facilities are located in 18 countries, including the United States,
Canada, Japan and many European countries. On a pro forma basis, research models
accounted for 62%, and biomedical products and services accounted for 38%, of
net sales for the twelve-month period ended September 25, 1999. Over the same
time period, we reported pro forma net sales of $230.5 million and pro forma
Adjusted EBITDA of $57.0 million. Adjusted EBITDA represents EBITDA, as defined,
adjusted for non-recurring, non-cash and cash items, as appropriate, which is
more fully described on page 12. EBITDA, as defined, represents operating income
plus depreciation and amortization. Adjusted EBITDA is presented because we
believe it is a meaningful indicator of Charles River's operating performance,
and it is the measure by which certain of the covenants under the new credit
facility are computed. EBITDA, as defined, and Adjusted EBITDA are not intended
to represent cash flows for the period, nor are they presented as an alternative
to operating income or as an indicator of operating performance. They should not
be considered in isolation or as a substitute for measures of performance
prepared in accordance with generally accepted accounting principles ("GAAP") in
the United States and are not indicative of operating income or cash flow from
operations as determined under GAAP. Our method of computation may not be
comparable to other similarly titled measures of other companies.

     Our principal executive offices are located at 251 Ballardvale Street,
Wilmington, MA 01887 and our telephone number is (978) 658-6000.

                                        1


<PAGE>



     Research Models. We have a leading position in the global market for
research models, which primarily consists of purpose-bred rats and mice. The use
of research models is often a critical part of scientific discovery in the life
sciences and is required by FDA guidelines as well as foreign regulatory
agencies for new drug approval processes. Our business is primarily involved in
the early stages of drug discovery and development, commonly referred to as the
pre-clinical stage of drug development. During this stage, promising new drug
candidates are evaluated for their efficacy and safety through testing in
research models. Data from the pre-clinical stage is submitted to the applicable
regulatory agency for review in order for the drug to obtain approval to advance
to the human testing stage, commonly known as clinical studies. We principally
produce and sell rats, mice, other rodents and primates with highly defined
health and genetic backgrounds, primarily for use in pre-clinical research. Our
research models include special disease rodent models, such as mice with
impaired immune systems, which are increasingly demanded by biomedical
researchers for specialized research and discovery. We focus on maintaining
reliable biosecurity, which includes stringent guidelines to ensure
contamination-free research models. As a result, we provide consistent product
availability and offer a wide variety of healthy, genetically defined and
specifically targeted research models. We further differentiate our research
models by providing extensive technical service and support, including
scientific oversight from a team of more than 70 full-time, dedicated
professionals specializing in laboratory animal medicine, pathology and virology
as well as molecular biology, primatology and genetics.

     Biomedical Products and Services. Our biomedical products and services are
principally focused on meeting the research needs of large pharmaceutical
companies as well as biotechnology, animal health, medical device and
diagnostics companies. We are a leading supplier of endotoxin testing kits that
detect fever producing toxins in injectable drugs and devices and are one of
only two FDA validated in vitro alternatives to an animal test. In addition, we
are one of the world's largest producers of specific pathogen free fertile
chicken eggs which we refer to as "SPF eggs", which are principally used to
produce poultry vaccines. Our other biomedical products and services, many of
which are related to technologies developed in our research model business,
include:

   o transgenic animal production

   o medical device testing

   o contract research services

   o comprehensive health monitoring programs, including DNA testing, of animal
     colonies

   o testing services for human protein drug candidates

   o facility management services

Competitive Strengths

     Long-Standing Relationships with an Extensive Customer Base. Our customers
consist primarily of large pharmaceutical companies, including the ten largest
global pharmaceutical companies based on 1998 revenues, as well as
biotechnology, animal health, medical device and diagnostics companies and
hospitals, academic institutions and government agencies. We have many
long-term, stable relationships with our customers as evidenced by the fact that
all of our top 20 customers in 1989 remain our customers today. We have further
strengthened our customer relationships by offering related biomedical products
and services to our research model customers. Our customer base is also
diversified with no individual customer accounting for more than 3% of net sales
in 1998 and the top 30 customers representing approximately 30% of total net
sales.

     Critical Component of Pharmaceutical Research. The research models we
supply are essential to the new drug discovery and development process. FDA
guidelines and certain foreign regulatory agencies for many years

                                        2


<PAGE>



have required that new drug candidates be tested on two separate animal species
in the pre-clinical stage. According to the Pharmaceutical Research and
Manufacturers of America, total research and development spending in the United
States by research-based pharmaceutical companies was $17 billion in 1998. While
pharmaceutical companies generally invest large sums of money in developing new
drugs, the purchase of research models typically represents an immaterial
portion of the cost to commercialize a new drug. As a result, most customers are
principally focused on the quality of the research model which is critical for
achieving accurate and reproducible study results and facilitating timely FDA
approval of new drug candidates. For these reasons, our reputation for high
quality models and consistent product availability enables us to maintain and
expand our customer relationships.

     Leading Market Position. We believe that our worldwide infrastructure,
global staff of nearly 100 scientific professionals, 50 years of operating
history and reputation for high quality products have established us as a global
market leader in the commercial production and supply of research models. We
maintain our leadership position through our well-established customer
relationships, extensive high quality product offerings and ability to provide
complementary services. Our market leadership in research models has allowed us
to capitalize on the significant research and development spending by large
pharmaceutical companies, and more recently on outsourcing trends by our
customers.

     Global Presence. We are a global provider of research models, with 49
facilities in the United States, Canada, Japan and many European countries. On a
pro forma basis, our international business contributed approximately 36% of our
net sales for the twelve-month period ended September 25, 1999. We believe that
as our customers continue to expand globally, they are likely to prefer to deal
with a select number of suppliers who have the ability to offer them a wide
range of products and services worldwide and in a timely manner. In addition,
our customers benefit from our global presence because it reduces potential
exposure to biosecurity risks and minimizes regulatory restrictions and costs
relating to transporting research models over long distances. We provide our
customers with uniform and consistent research models, regardless of the
location of their research study.

     Experienced and Motivated Management Team. Our senior management team has
extensive experience in supplying the biomedical research industry, and an
average of 17 years of experience with Charles River. Our senior management
team, led by our chief executive officer, James C. Foster, has successfully
grown our business, secured our current strong market positions, integrated
eight strategic acquisitions since 1992 and positioned us for growth. Our senior
management team has broadened our pure research model focus to also include
being a leading supplier of biomedical products and services in several
specialized niche markets. As a result of the recapitalization of our business,
our management team indirectly holds 6.1% of the equity of Charles River, and
expects to have the option to acquire additional equity of Charles River through
a customary equity incentive plan.

Business Strategy

     Increase Sales in Research Models. We believe we can continue to increase
our market share in this segment by introducing new research models, providing
exceptional technical service and support, optimizing our existing price
structure and product mix and maintaining reliable biosecurity. In general, we
have been able to increase our prices at rates that are above the rate of
inflation in the United States by maintaining high quality and specialized
products, enhancing service and improving availability. We also have been
focused on periodically adding higher value research models to our portfolio.
These higher value research models tend to be premium priced, targeted towards
specific disease conditions and provide us with an enhanced product mix that
contributes to moderate but sustained growth in the research model business. We
expect to continue to expand this segment, both through sustained growth in
demand for already introduced models and the introduction of new models.

     Expand Value-Added Biomedical Products and Services. Our biomedical
products and services segment has been our fastest growing segment over the past
several years. We believe we can continue to grow this business by capitalizing
on outsourcing trends, building upon our existing capabilities and increasing
our global sales.

                                        3


<PAGE>



     Capitalize on Outsourcing Trends. Most of our biomedical products and
     services have been developed in response to the increasing outsourcing
     trends within the pharmaceutical industry. We believe this shift toward
     increased outsourcing began in response to the pharmaceutical companies'
     growing capabilities in identifying potential new drug compounds and the
     resulting resource constraints placed on pharmaceutical research
     infrastructures by non-core activities. By outsourcing their non-core
     activities to us, our customers can focus on proprietary drug development
     and streamline their drug development process. In response, we have
     expanded our offerings to include many pre-clinical research activities
     undertaken by our customers.

     Build Upon Our Existing Capabilities. As a result of our strong position in
     research models, our global presence and our professional expertise, we
     have the unique capability to offer related biomedical products and
     services to many of our customers. We intend to build upon this expertise
     to capture more outsourcing business opportunities by using our existing
     infrastructure, reputation for quality and extensive customer contacts. We
     believe there are numerous other opportunities for increasing our share of
     high value pre-clinical research services and products.

     Increase Our Global Sales. Our current biomedical products and services
     customer base is primarily composed of our domestic research model
     customers. We intend to continue to cross-sell our biomedical products and
     services to our existing international research model customers as well as
     seek new international customers for this segment. We believe that we can
     rapidly increase our global presence in this area by leveraging our
     existing international customer relationships and infrastructure.

     Undertake Strategic Acquisitions and Alliances. We have a history of
acquiring and successfully integrating small companies in both our research
model and our biomedical products and services businesses. We expect that
strategic acquisitions will continue to provide an additional source of
long-term growth. In addition, we believe that our association with Global
Health Care Partners, LLC, one of our equity investors, will assist us in
identifying attractive acquisition candidates while expanding our existing
business. Global Health Care Partners, which is comprised of several experienced
healthcare executives, has a strategic partnership with DLJ Merchant Banking
Partners II, L.P. to invest in healthcare related businesses. The founding
partners of Global Health Care Partners who are represented on the Charles River
board include Henry Wendt, former Chairman of SmithKline Beecham Corporation,
Robert Cawthorn, former Chairman and CEO of Rhone-Poulenc Rorer Inc. and Douglas
Rogers, founder of Kidder, Peabody's Health Care Group.

                                THE TRANSACTIONS

     We collectively refer to the recapitalization and the Sierra acquisition,
which we describe below, as the "Transactions."

The Recapitalization

     On September 29, 1999, we were acquired by certain affiliates of DLJ
Merchant Banking Partners II, L.P., management and other investors while certain
subsidiaries of Bausch & Lomb Incorporated retained a portion of their equity
investment in us, for total consideration of $456.2 million. As a result, DLJ
Merchant Banking Partners II, L.P. and some of its affiliates, who we refer to
collectively as the "DLJMB Funds", indirectly own 71.9% and subsidiaries of
Bausch & Lomb Incorporated, whom we refer to collectively as the "Rollover
Shareholders", own 12.5% of Holdings. We are a wholly owned subsidiary of
Holdings. The recapitalization was financed with:

   o a portion of the proceeds from the offering of units, which consisted of
     the old notes and warrants to purchase shares of common stock of Holdings

   o $105.6 million in equity investment, consisting of $92.4 million in cash by
     the DLJMB Funds, management, and other investors and equity retained by the
     Rollover Shareholders with a fair value of $13.2 million

                                        4


<PAGE>



   o a portion of the borrowings of approximately $162.0 million under our new
     senior secured credit facility

   o senior discount debentures with warrants issued by Holdings to the DLJMB
     Funds and other investors for $37.6 million

   o a subordinated discount note issued by Holdings to the Rollover
     Shareholders for $43.0 million

   o We collectively refer to the Recapitalization and all related financing as
     the "Recapitalization."

The Sierra Acquisition

     Concurrently with the recapitalization, we acquired SBI Holdings, Inc.
("Sierra") for an initial purchase price of $24.0 million, of which
approximately $6.0 million was used to repay Sierra's existing debt. We funded
the acquisition of Sierra with:

   o available cash

   o a portion of the net proceeds from the units

   o a portion of the borrowings under our new credit facility

     Sierra is a pre-clinical biomedical services company with expertise in drug
safety and efficacy assessment studies using research models. We believe that
the acquisition of Sierra will contribute to our growing presence in the
pre-clinical testing services business.

     We collectively refer to the acquisition of Sierra and all related
financings as the "Sierra Acquisition."

                                        5


<PAGE>



                               THE EXCHANGE OFFER

Securities Offered.............We are not offering to exchange the warrants that
                               were issued with the old notes in this exchange
                               offer. We are registering the warrants and the
                               common stock into which the warrants are
                               exercisable on a separate "shelf" registration
                               statement.

The Exchange Offer.............We are offering to issue the new notes in
                               exchange for a like principal amount of your old
                               notes. We are offering to issue the new notes to
                               satisfy our obligations contained in the
                               registration rights agreement entered into when
                               the old notes were sold in transactions pursuant
                               to Rule 144A and Regulation S under the
                               Securities Act and therefore not registered with
                               the SEC. For procedures for tendering, see "The
                               Exchange Offer."

Expiration Date, Tenders,
Withdrawal.....................The exchange offer will expire at 5:00 p.m. New
                               York City time on __________________, 1999 unless
                               it is extended. If you decide to exchange your
                               old notes for new notes, you must acknowledge
                               that you are not engaging in, and do not intend
                               to engage in, a distribution of the new notes. If
                               you decide to tender your old notes pursuant to
                               the exchange offer, you may withdraw them at any
                               time prior to ____________, 1999. If we decide
                               for any reason not to accept any old notes for
                               exchange, your old notes will be returned to you
                               without expense promptly after the exchange offer
                               expires.

Federal Income Tax
Consequences...................Your exchange of old notes for new notes pursuant
                               to the exchange offer will not result in any
                               income, gain or loss to you for Federal income
                               tax purposes. See "Material United States Federal
                               Income Tax Consequences of the Exchange Offer."

Use of Proceeds................We will not receive any proceeds from the
                               issuance of the new notes pursuant to the
                               exchange offer.

Exchange Agent.................State Street Bank and Trust Company is the
                               exchange agent for the exchange offer. See page
                               109 for information on how to contact the
                               exchange agent.

                                        6


<PAGE>




Accounting Treatment...........We intend to account for the exchange offer based
                               on the historical basis of accounting for the old
                               notes. As a result, we will report the new notes
                               at the same carrying value as the old notes on
                               the date of the exchange. Accordingly, we will
                               not recognize any gain or loss related to this
                               exchange.

                                        7


<PAGE>



                      CONSEQUENCES OF EXCHANGING OLD NOTES
                         PURSUANT TO THE EXCHANGE OFFER

     Based on interpretations by the SEC's staff in no-action letters issued to
third parties, we believe that new notes issued in exchange for old notes
pursuant to the exchange offer may be offered for resale, resold or otherwise
transferred by you without registering the new notes under the Securities Act or
delivering a prospectus so long as each of the following applies to you:

   o you are not one of our "affiliates", which is defined in Rule 405 of the
     Securities Act

   o you acquire the new notes in the ordinary course of your business

   o either you are a broker-dealer or you do not have any arrangement with any
     person to participate in the distribution of such new notes

   Unless you are a broker-dealer, you must acknowledge both that:

   o you are not engaged in, and do not intend to engage in, a distribution of
     the new notes

   o you have no arrangement or understanding to participate in a distribution
     of the new notes

     If you are an affiliate of Charles River, or you are engaged in, intend to
engage in or have any arrangement or understanding with respect to, the
distribution of new notes acquired in the exchange offer, you (1) should not
rely on our interpretations of the position of the SEC's staff and (2) must
comply with the registration and prospectus delivery requirements of the
Securities Act in connection with any resale transaction.

     If you are a broker-dealer and receive new notes for your own account
pursuant to the exchange offer:

   o you must acknowledge that you will deliver a prospectus in connection with
     any resale of such new notes. The letter of transmittal states that by
     acknowledging and delivering a prospectus, you will not be deemed to admit
     that you are an "underwriter" within the meaning of the Securities Act

   o you may use this prospectus, as it may be amended or supplemented from time
     to time, in connection with the resale of new notes received in exchange
     for old notes acquired by you as a result of market-making or other trading
     activities

     For a period of 90 days after the expiration of the exchange offer, we will
make this prospectus available to any broker-dealer for use in connection with
any such resale.

     In addition, you may offer or sell the new notes in some jurisdictions only
if they have been registered or qualified for sale there, or an exemption from
registration or qualification is available and is complied with. Subject to the
limitations specified in the registration rights agreement, we will register or
qualify the new notes for offer or sale under the securities laws of any
jurisdictions that you reasonably request in writing. Unless you request that
the sale of the new notes be registered or qualified in a jurisdiction, we
currently do not intend to register or qualify the sale of the new notes in any
jurisdiction. If you do not comply with such requirement, you could incur
liability under the Securities Act, and we will not indemnify you in such
circumstances.

                                        8


<PAGE>


                        SUMMARY DESCRIPTION OF THE NOTES

     The terms of the new notes and the old notes are identical in all
material respects, except that the new notes are not guaranteed by any
subsidiaries since the subsidiaries which guaranteed the old notes have been
merged into Charles River, and the new notes have been registered under the
Securities Act. In addition, the transfer restrictions and registration rights
relating to old notes do not apply to the new notes. We use "notes" to refer to
both the old notes and the new notes.

Maturity Date..................October 1, 2009.

Interest Rate and
Payment Dates..................Interest on the notes will accrue at the rate of
                               13.5% per year, payable semi-annually in cash in
                               arrears on October 1 and April 1 of each year,
                               commencing April 1, 2000. The interest rate is
                               subject to increase to 14% per year on August 15,
                               2000 in the event we do not meet a specified
                               ratio as of June 30, 2000.

Optional Redemption............On or after October 1, 2004 we may redeem some or
                               all of the notes at any time at the redemption
                               prices described in the section "Description of
                               Notes" under the heading "Optional Redemption."

                               Prior to October 1, 2002, we may redeem up to 35%
                               of the notes with the proceeds of a public equity
                               offering at the redemption price listed in the
                               section "Description of Notes" under the heading
                               "Optional Redemption."

Mandatory Repurchase
Offer..........................If we sell certain assets or experience specific
                               kinds of changes in control of our company, we
                               must offer to repurchase the notes at the prices
                               listed in the section "Description of Notes"
                               under the heading "Repurchase at the Option of
                               Holders." See "Risk Factors--We may be unable to
                               purchase the notes upon a change of control."

Ranking........................The notes will be senior subordinated debt.

                               The notes will rank:

                               o  junior to all of our existing and future
                                  senior indebtedness and secured indebtedness,
                                  including any borrowings under our new credit
                                  facility

                               o  equally with any of our future senior
                                  subordinated indebtedness, including trade
                                  payables

                               o  senior to any of our future subordinated
                                  indebtedness

                               o  effectively junior to all of the liabilities
                                  of our subsidiaries

                               At September 25, 1999, on a pro forma basis,
                               after giving effect to the Transactions, the
                               notes would have been

                                        9


<PAGE>



                               contractually subordinated to $163.3 million of
                               our senior indebtedness and effectively
                               subordinated to $5.2 million of liabilities,
                               including trade payables but excluding
                               intercompany obligations, of our subsidiaries.

Certain Covenants..............The indenture governing the notes contains
                               certain covenants that limit, among other things,
                               our ability, and the ability of some of our
                               subsidiaries, to:

                               o  borrow money

                               o  create liens

                               o  engage in sale-leaseback transactions

                               o  pay dividends on stock or repurchase stock

                               o  make certain investments

                               o  engage in transactions with affiliates or

                               o  sell certain assets or merge with or into
                                  other companies

                               For more details, see the section "Description of
                               Notes" under the heading "Certain Covenants."

Use of Proceeds................We will not receive any proceeds from the
                               exchange of new notes for old notes.

                                       10


<PAGE>



                   SUMMARY HISTORICAL AND UNAUDITED PRO FORMA
                           CONSOLIDATED FINANCIAL DATA

     The table below presents summary historical and unaudited pro forma
consolidated financial data and other data for Charles River. The summary
historical consolidated financial data for the fiscal years ended December 28,
1996, December 27, 1997 and December 26, 1998 are derived from our consolidated
financial statements and the notes thereto included elsewhere in this
prospectus. The summary unaudited financial data as of September 25, 1999 and
for the nine months ended September 26, 1998 and September 25, 1999 are derived
from our unaudited consolidated financial statements and the notes to those
statements. In the opinion of management, our unaudited consolidated financial
statements include all adjustments, consisting only of normal recurring
adjustments, necessary for a fair presentation of the financial condition and
results of operations for these periods. The summary unaudited pro forma
consolidated financial data are derived from the Unaudited Pro Forma Condensed
Consolidated Financial Data appearing elsewhere in this prospectus. The summary
unaudited pro forma consolidated financial data do not purport to be indicative
of the results that actually would have been obtained had the Transactions been
completed as of such dates and are not intended to be a projection of our future
results of operations or financial position. You should read the information
contained in this table in conjunction with "Use of Proceeds," "Selected
Historical Consolidated Financial Data," "Management's Discussion and Analysis
of Financial Condition and Results of Operations," "Unaudited Pro Forma
Condensed Consolidated Financial Data" and our consolidated financial statements
and the notes thereto contained elsewhere in this prospectus.

<TABLE>
                                                                                                              Pro Forma
                                                                                                 ----------------------------------
                                                Fiscal Year (1)                9 Mos. Ended                    9 Mos.     12 Mos.
                                          --------------------------------  --------------------- Fiscal Year  Ended      Ended
                                                                              Sept. 26,  Sept. 25,    Ended   Sept. 25,  Sept. 25,
                                             1996       1997       1998          1998       1999       1998     1999        1999
                                          ---------   ---------  ---------    ---------  --------- ---------- --------   ----------
                                                                           (dollars in thousands)
<S>                                        <C>         <C>        <C>           <C>        <C>       <C>       <C>        <C>
Income Statement Data:
Net sales...............................   $155,604    $170,713   $193,301     $145,519   $161,096   $216,638  $177,130   $230,496
Cost of products sold and services
 provided...............................     97,777     111,460    122,547       91,041     97,230    135,897   106,819    141,370
Selling, general and administrative
 expenses...............................     28,327      30,451     34,142       25,202     29,414     41,215    34,760     45,738
Amortization of goodwill and other
 intangibles............................        610         834      1,287        1,036      1,114      2,585     2,006      2,547
Restructuring charges...................      4,748       5,892         --           --         --         --        --         --
                                           ========    ========   ========     ========   ========   ========  ========   ========
Operating income........................     24,142      22,076     35,325       28,240     33,338     36,941    33,545     40,841
Other Data:
EBITDA, as defined(2)...................    $33,670     $31,779    $46,220      $36,172    $42,039    $49,957   $43,678    $54,585
Adjusted EBITDA(2)......................     39,167      38,528     47,234       37,012     43,378     51,453    45,468     57,031
Adjusted EBITDA margin..................      25.2%       22.6%      24.4%        25.4%      26.9%      23.8%     25.7%      24.7%
Depreciation and amortization...........     $9,528      $9,703    $10,895       $7,932     $8,701    $13,016   $10,133    $13,744
Capital expenditures....................     11,572      11,872     11,909        5,834      7,426     13,307     8,398     14,967
Cash interest expense(3).............................................................................  35,013    28,330     37,134
Cash flows from operating activities(4).    $20,545     $23,684    $36,699      $23,486    $19,552
Cash flows from investing activities(4).   $(11,678)   $(12,306)  $(22,349)    $(14,267)   $(4,751)
Cash flows from financing activities(4).    $(4,068)   $(12,939)   $(8,018)     $(2,412)  $(34,554)
Selected Ratios:
Ratio of earnings to fixed charges(5)...      18.8x       16.5x      25.8x        26.1x      33.7x       1.0x      1.2x       1.1x
Ratio of Adjusted EBITDA to cash interest
    expense..........................................................................................    1.5x      1.6x       1.5x
Ratio of total pro forma debt to Adjusted
    EBITDA.............................................................................................................       5.5x
</TABLE>
                                                       11


<PAGE>

<TABLE>

                                                    As of September 25, 1999
                                                    -------------------------
                                                    Historical    Pro Forma
                                                    ----------    ----------
                                                     (dollars in thousands)
<S>                                                          <C>           <C>
Balance Sheet Data:
Cash and cash equivalents..........................    $3,457        $3,678
Working capital....................................    20,596        31,870
Total assets.......................................   210,371       327,824
Total debt(6)......................................     1,033       311,128
Total stockholder's equity.........................   148,965       (30,357)
</TABLE>

- -------------------

(1)  Our fiscal year consists of twelve months ending on the Saturday closest to
     December 31.

(2)  EBITDA, as defined, represents operating income plus depreciation and
     amortization. EBITDA, as defined, is presented because it is a widely
     accepted financial indicator used by certain investors and analysts to
     analyze and compare companies on the basis of operating performance.

     Adjusted EBITDA, which represents EBITDA, as defined, adjusted for
     non-recurring, non-cash and cash items, as appropriate, is presented below
     because we believe it is a meaningful indicator of Charles River's
     operating performance and it is the measure by which certain of the
     covenants under the new credit facility are computed.

     EBITDA, as defined, and Adjusted EBITDA are not intended to represent cash
     flows for the period, nor are they presented as an alternative to operating
     income or as an indicator of operating performance. They should not be
     considered in isolation or as a substitute for measures of performance
     prepared in accordance with GAAP in the United States and are not
     indicative of operating income or cash flow from operations as determined
     under GAAP. Our method of computation may or may not be comparable to
     other similarly titled measures of other companies.

     The following table sets forth a reconciliation of EBITDA, as defined, to
     Adjusted EBITDA:

<TABLE>

                                                                                              Pro Forma
                                                                                     ---------------------------------
                                   Fiscal Year                Nine Months Ended                  9 Months    12 Months
                              -----------------------------  -------------------                  Ended        Ended
                                                                                    Fiscal Year  Sept. 25,    Sept. 25
                              1996       1997       1998      1998        1999      Ended 1998      1999         1999
                              -----      -----     -----      -----      -----      -----------  ---------   ----------
                                                            (dollars in thousands)

<S>                                <C>        <C>       <C>        <C>         <C>        <C>        <C>         <C>
EBITDA, as defined.........    $33,670    $31,779   $46,220    $36,172     $42,039    $49,957    $43,678     $54,585
Restructuring and other
   charges.................      4,748      5,892        --         --         400         --        400         400
Dividends received from
   equity investments......        725        773       681        681         815        681        815         815
Charles River non-cash
   compensation(a).........         24         84       333        159         124        333        124         298
Sierra non-cash
   compensation(a).........         --         --        --         --          --        262         --         262
Non-recurring transaction
   expenses(b).............         --         --        --         --          --        220        451         671
                               -------    -------   -------    -------     -------    -------    -------     -------
Adjusted EBITDA............    $39,167    $38,528   $47,234    $37,012     $43,378    $51,453    $45,468     $57,031
                               =======    =======   =======    =======     =======    =======    =======     =======
</TABLE>

- -------------------

     (a)  Amount represents non-cash compensation expense recorded by Charles
          River and Sierra as a result of options under their respective option
          plans being issued at below fair market value.

                                       12


<PAGE>



     (b)  Represents expenses incurred by Sierra related to its acquisition of
          HTI Bio-Services, Inc., and to its acquisition by Charles River; these
          amounts are considered non-recurring.

(3)  Cash interest expense represents total interest expense less amortization
     of deferred financing costs and other non-cash interest charges.

(4)  Cash flows information is not presented with respect to the unaudited pro
     forma data because a statement of cash flows is not required by Article 11.

(5)  For purposes of calculating the ratio of earnings to fixed charges,
     "earnings" consist of income before income taxes, minority interests and
     earnings from equity investments less minority interests plus earnings from
     equity investments plus fixed charges. "Fixed charges" consist of interest
     expense on all indebtedness, amortization of deferred financing costs and
     one-third of rental expense from operating leases that we believe is a
     reasonable approximation of the interest component of rental expense.

(6)  Total debt includes all debt and capital lease obligations, including
     current portions.

                                       13


<PAGE>



                                  RISK FACTORS

     In addition to the other matters described in this prospectus, you should
carefully consider the following risk factors before making an investment in the
new notes.

Risks relating to our debt

        We have a significant amount of debt

     On a pro forma basis, after giving effect to the Transactions, as of
September 25, 1999, we had (a) total consolidated indebtedness of approximately
$311.1 million; and (b) approximately $28 million of borrowings available under
our new credit facility, subject to customary conditions. In addition, subject
to the restrictions in our new credit facility and the indenture, we may incur
significant additional indebtedness, which may be secured, from time to time.

     The level of our indebtedness could have important consequences, including:

   o limiting cash flow available for general corporate purposes, including
     acquisitions, because a substantial portion of our cash flow from
     operations must be dedicated to servicing our debt

   o limiting our ability to obtain additional debt financing in the future for
     working capital, capital expenditures or acquisitions

   o limiting our flexibility in reacting to competitive and other changes in
     our industry and economic conditions generally

   We may not be able to service our debt

     Our ability to pay or to refinance our indebtedness will depend upon our
future operating performance, which will be affected by general economic,
financial, competitive, legislative, regulatory, business and other factors
beyond our control.

     We anticipate that our operating cash flow, together with money we can
borrow under our new credit facility, will be sufficient to meet anticipated
future operating expenses, to fund capital expenditures and to service our debt
as it becomes due. If we were still unable to meet our debt service obligations,
we could attempt to restructure or refinance our indebtedness or seek additional
equity capital. We cannot assure you that we will be able to accomplish those
actions on satisfactory terms, if at all.

     In addition, subject to the restrictions and limitations contained in our
debt agreements, we may incur significant additional indebtedness, which could
adversely affect our operating cash flows and our ability to service
indebtedness.

   Restrictive covenants in our indenture and new credit facility may adversely
affect us

     The indenture governing the notes contains various covenants that limit our
ability to engage in certain transactions.

     In addition, our new credit facility contains other and more restrictive
covenants and prohibits us from prepaying our subordinated indebtedness,
including the notes. Our new credit facility also requires us to maintain
specified financial ratios and satisfy certain other financial condition tests.
Our ability to meet those financial ratios and tests can be affected by events
beyond our control, and we cannot assure you that we will meet those tests. A
breach of any of these covenants could result in a default under our new credit
facility and/or the notes. Upon the occurrence of an event of default under our
new credit facility, which includes a cross default to indebtedness of

                                       14


<PAGE>



Holdings, the lenders could elect to declare all amounts outstanding under our
new credit facility to be immediately due and payable and terminate all
commitments to extend further credit. If we were unable to repay those amounts,
the lenders could proceed against the collateral granted to them to secure that
indebtedness. We pledged substantially all of our assets, other than assets of
our foreign subsidiaries, as security under our new credit facility. If the
lenders under our new credit facility accelerate the repayment of borrowings, we
cannot assure you that we will have sufficient assets to repay our new credit
facility and our other indebtedness, including the notes.

The notes will be subordinated to other debt

     The notes will be subordinated to our senior indebtedness

     The notes rank junior to all of our existing and future senior
indebtedness, including all indebtedness under our new credit facility.

     As a result of the subordination of the notes, if:

     o we become insolvent or enter into a bankruptcy or similar proceeding

     o we fail to make a payment when due on senior indebtedness

     o any senior indebtedness is accelerated

then the holders of our senior indebtedness must be paid in full before you are
paid.

     In addition, we cannot make any cash payments to you if we have failed to
make payments to holders of designated senior indebtedness. Under certain
circumstances, we cannot make any payments to you for a period of up to 179 days
if we have defaulted, other than failures to make payments, under our senior
indebtedness covenants.

     At September 25, 1999, on a pro forma basis, after giving effect to the
Transactions, the notes would have ranked junior in right of payment to $163.3
million of senior indebtedness.

   We may incur additional indebtedness ranking equal to the notes

     If we incur any additional debt that ranks equally with the notes
(including trade payables), the holders of that debt will be entitled to share
ratably with you in any proceeds distributed in connection with any insolvency,
liquidation, reorganization, dissolution or other winding-up of our company.
This may have the effect of reducing the amount of proceeds paid to you.

   The notes will be structurally junior to indebtedness of our subsidiaries

     Holders of indebtedness and other liabilities of our subsidiaries will
effectively be senior to your claims under the notes against those subsidiaries.
As of September 25, 1999, on a pro forma basis, our subsidiaries had $5.2
million of outstanding liabilities, including trade payables (excluding
intercompany obligations).

We may be unable to purchase the notes upon a change of control

     Upon the occurrence of "change of control" events specified in the
"Description of Notes," you may require us to purchase your notes at 101% of
their principal amount, plus accrued interest. The terms of our new credit
facility limit our ability to purchase your notes in such circumstances. Any of
our future debt agreements may contain similar restrictions and provisions.
Accordingly, we may not be able to satisfy our obligations to purchase your
notes unless we are able to refinance or obtain waivers under the new credit
facility and other indebtedness with similar restrictions. We cannot assure you
that we will have the financial resources to purchase your notes,

                                       15


<PAGE>



particularly if such change of control event triggers a similar repurchase
requirement for, or results in the acceleration of, other indebtedness. Our new
credit facility currently provides that certain change of control events will
constitute a default and could result in the acceleration of our indebtedness
under the new credit facility.

Risks relating to our business

    Biosecurity breaches or "contaminations" can damage our inventory and result
in decrease in sales

     On a pro forma basis, research models accounted for 62% of our net sales
for the twelve-month period ended September 25, 1999. We breed research models
that are free of certain agents, such as viruses and bacteria, which when
present can distort or otherwise compromise the quality of research results. We
also produce fertile chicken eggs that must be free of certain avian
contaminants in order to be used in poultry and human vaccine production. A
breach in biosecurity within any one of over 150 barrier breeding rooms or 50
poultry houses could result in the introduction of an otherwise excluded agent
into that room's animal or bird population. These breaches can arise from
several factors or conditions, including:

     o a supervisor's or animal care technician's failure to oversee or follow
       operating protocols,

     o compromised breed stock, or

     o from an erosion in a "clean room's" equipment or structure

     A biosecurity breach typically results in the "recycling" or cleaning up of
the contaminated room, which in turn results in inventory loss, clean-up and
start-up costs, and can reduce sales as a result of lost customer orders and
credits for prior shipments. Biosecurity breaches are unanticipated and
difficult to predict. We experienced several material contaminations in 1996 and
a few significant contaminations in 1997 that adversely impacted our 1996 and
1997 financial results. We experienced no significant contaminations in 1998.
Future contaminations may harm our reputation for providing high quality
products. In the event of a known contamination, we immediately notify our
customers. While avoidance of biosecurity breaches in our research model and SPF
egg facilities around the world is our highest operational priority, with
several worldwide programs in place, we cannot assure you that we will not
experience future barrier room or poultry house contaminations that will
adversely impact our operations and financial results.

   We are dependent on certain industries; consolidations in the pharmaceutical
industry may result in less demand for our business

     Our sales are highly dependent on research and development expenditures by
the pharmaceutical and, to a lesser extent, biotechnology industries. Our
operations could be materially and adversely affected by general economic
downturns in our clients' industries, or any decrease in research and
development expenditures.

     Over the past several years, the pharmaceutical industry has undergone a
period of significant consolidations, particularly in Europe, a trend that many
industry experts expect to continue. After recent consolidations, certain
customers combined or otherwise reduced their research and development
operations, resulting in fewer animal research activities. Due to these
consolidations, we have experienced both temporary disruptions and permanent
reductions in purchases of our research models by some of our customers.
Consolidations may also lead to reduced demand as our customers eliminate
redundant research activities. Future consolidations in the pharmaceutical
industry could result in additional disruptions and reductions in purchasing and
consequently adversely affect our results of operations.

   The outsourcing trend in the pharmaceutical industry may decrease, which
could affect our growth

     Some of our biomedical products and services businesses have grown
significantly as a result of the increase over the past several years in
outsourcing of non-clinical research support activities by pharmaceutical
companies.

                                       16


<PAGE>



While industry analysts expect the outsourcing trend to continue for the next
several years, a substantial decrease in outsourcing activity in the
pre-clinical sector could result in a diminished growth rate in the sales of one
or more of our expected higher growth businesses.

   Displacement technologies may be developed, validated and increasingly used
in biomedical research, and as a result could reduce demand for some of our
products

     For many years, groups within the scientific and research community have
attempted to develop models, methods and systems that would replace or
supplement the use of living animals as test subjects in biomedical research.
While several techniques have been developed that have scientific merit,
especially in the area of cosmetics and household product testing (markets in
which we are not active), few alternative test methods have been validated and
successfully deployed in the discovery and development of effective and safe
treatments for human and animal disease conditions. The principal validated in
vitro or non-animal test system is the LAL, or endotoxin testing system, a
technology which we acquired and have aggressively marketed as an alternative to
an animal test. We are also part of a strategic alliance involving software that
is predictive of systemic responses to certain biologically active molecular
configurations. While we would expect to participate in some fashion with any in
vitro method as it becomes validated as a research model alternative or adjunct
in our markets, we cannot assure you that these methods will be available to us
or that we will be successful in commercializing these methods. Even if we are
successful, net sales from these methods may not offset reduced research model
net sales, which would adversely affect our results of operations.

     In our SPF egg business, researchers have developed recombinant
technologies that could displace certain avian vaccine applications for SPF
eggs. At this time, we do not believe that these technologies can compete with
SPF eggs from a cost or performance standpoint, but we cannot assure you that
recombinant technologies will not improve in the future until they become a
commercially viable alternative to SPF eggs.

     In our endotoxin testing business, researchers are in the early stages of
developing a potential recombinant alternative to the naturally occurring LAL
product. We intend to collaborate with an academic research group with early
stage proprietary technology. While we do not expect the recombinant technology
to be a viable commercial alternative to LAL, due to cost and performance
deficiencies, we cannot assure you that a technology displacement derived in
vitro will not be developed.

     Such alternative research methods would decrease the need for research
models, and we may not be able to develop new products effectively or in a
timely manner to replace any lost sales.

   Animal rights issues could have a material adverse effect on our primate and
overall business

     Increased social focus on animal testing could adversely affect our
business. Although our primate business constitutes a small part of our overall
business, it has from time to time been subjected to animal rights media
attention and on-site protests, especially at our small import facility located
in England. In addition, animal rights activists have also focused on Sierra's
business, which involves large animals. The protests and demonstrations by
animal rights activists may lead our customers, many of whom are concerned with
public perception, to decide to decrease their business with us. In addition,
threats to our facility located in England have been made by animal rights
activists, which may result in property damages, or may cause us to incur
expenses in protecting our employees and our facility and subject us to
liabilities. Our core research models of rats, mice and other rodents have not
historically been the subject of such protests. However, developments and
movements in the area of animal rights, including protests related to rats, mice
and other rodents, could adversely affect our business.

   Some of our businesses are dependent on a few sources of animal suppliers and
 supply

     Our primate import business is dependent on animals both captured and bred
on the island of Mauritius. These animals are unique in that they are naturally
free of herpes B virus, which is important to our customers. While we have a
long-term supply agreement with the leading provider of these animals, and
supply has not been disrupted

                                       17


<PAGE>



since we commenced importing these animals a decade ago, we cannot assure you
that temporary or permanent obstacles to their continued supply might not arise,
including export or import restrictions or embargos, government or economic
instability or severe weather conditions in Mauritius. Sierra also depends on a
supply agreement with a provider in China, and any disruption of this supply may
have a material adverse effect on its business.

     Our endotoxin testing business is dependent on the plentiful availability
of horseshoe crabs, the blood of which is used to produce the test material. We
cannot assure you that there will not be regulatory or other restrictions
imposed on the use of horseshoe crabs in the future.

     If we are not able to obtain these animals from our existing sources, we
may not be able to find an alternative source on commercially reasonable terms,
or delivery to our customers may be delayed.

   Our supply of animal feed may be interrupted by the bankruptcy of our
commercial supplier

     Our commercial supplier of animal feed for our United States research model
business has filed for reorganization under the U.S. Bankruptcy Code; however,
we do not expect this to interrupt our supply of animal feed. In addition, we
believe an alternative or secondary source of animal feed could be secured if
necessary on terms comparable with our current supplier, although we cannot
assure you that we will be able to secure an alternative or secondary source on
comparable commercial terms.

   Our operations in foreign countries are subject to risks

     Approximately 46%, 41%, 40% and 35% of our net sales for 1996, 1997, 1998
and the nine months ended September 25, 1999 were derived from our operations
outside the United States. In addition, approximately 36% of our pro forma net
sales for the twelve-month period ended September 25, 1999 were derived from
operations outside the United States. Our operations and financial results could
be significantly affected by factors such as changes in foreign currency rates,
uncertainties related to regional economic circumstances and the costs of
complying with a wide variety of international and United States regulatory
requirements.

     Because the sales and expenses of our foreign operations are generally
denominated in local currencies, exchange rate fluctuations between local
currencies and the United States dollar will subject us to currency translation
risk with respect to the reported results of our foreign operations. We cannot
assure you that these fluctuations would not have an adverse effect on our
results of operations. We currently do not hedge against the risk of exchange
rate fluctuations.

   We face significant competition in our business

     We have different competitors in each of our business areas. We primarily
compete against smaller, limited-service providers in our research models
business and numerous other companies of varying sizes in our biomedical
products and services business. A few of our competitors in our biomedical
products and services business may have greater capital, technical and other
resources than we do. Expansion by our competitors into other areas in which we
operate could affect our competitive position. We generally compete on the basis
of quality, reputation, and availability, which is supported by our
international presence with strategically located facilities. We cannot assure
you that we will be able to compete favorably in these areas in the future.

   We are dependent on key personnel

     Our success depends to a significant extent on the continued services of
our senior management and other members of management. We could be adversely
affected if any of these persons were unwilling or unable to continue in our
employ.

     Certain of our biomedical products and services businesses, most notably
the Special Animal Services and biosafety testing businesses, are particularly
dependent on the retention and recruitment of key personnel with

                                       18


<PAGE>



highly specialized technical backgrounds. We cannot assure you that we will be
able to continue to successfully recruit and retain key scientific staff
necessary to support superior levels of service in our higher growth businesses,
especially during a period of tight labor markets.

   If we are not successful in selecting and integrating the businesses we
acquire, we may be adversely affected

     Since December 31, 1996, we have completed four acquisitions and will
continue to review future acquisition opportunities in the ordinary course of
our business. We cannot assure you that acquisition candidates will continue to
be available on terms and conditions acceptable to us. Acquisitions involve
numerous risks, including, among other things, difficulties and expenses
incurred in connection with the acquisitions and subsequent assimilation of the
operations and services or products of the acquired companies, the difficulty of
operating new businesses, the diversion of management's attention from other
business concerns and the potential loss of key employees of the acquired
company. Acquisitions of foreign companies also may involve the additional risks
of assimilating differences in foreign business practices and overcoming
language barriers. In the event that the operations of an acquired business do
not live up to expectations, we may be required to restructure the acquired
business. We cannot assure you that our past and any future acquisitions,
including the Sierra Acquisition, will be successfully integrated into our
operations.

   We are controlled by our principal shareholders whose interests may differ
from your interests

     Circumstances may occur in which the interests of our principal
shareholders could be in conflict with your interests. In addition, these
shareholders may have an interest in pursuing transactions that, in their
judgment, enhance the value of their equity investment in our company, even
though such transactions may involve risks to you as a holder of the notes.

     Most of our outstanding shares of common stock are directly or indirectly
held by the DLJMB Funds. As a result of their stock ownership, the DLJMB Funds
control us and indirectly have the power to elect most of our directors, appoint
new management and approve any action requiring the approval of the holders of
common stock, including adopting amendments to our certificate of incorporation
and approving recapitalizations or sales of all or substantially all of our
assets. The directors elected by the DLJMB Funds will have the ability to
control decisions affecting our capital structure, including the issuance of
additional capital stock, the implementation of stock repurchase programs and
the declaration of dividends.

     The general partners of each of the DLJMB Funds are affiliates or employees
of Donaldson, Lufkin & Jenrette, Inc. Donaldson, Lufkin & Jenrette Securities
Corporation, which was the initial purchaser of the units, is an affiliate of
Donaldson, Lufkin & Jenrette, Inc., as is DLJ Capital Funding, Inc., which is
the lead arranger, syndication agent and a lender under our new credit facility.

   Our historical financial information may not be representative of our results
as a separate company

     The historical financial information we have included in this prospectus
may not reflect what our results of operations, financial position and cash
flows would have been had we been a separate, stand-alone company during the
periods presented or what our results of operations, financial position and cash
flows will be in the future. Various adjustments and allocations were made to
the historical financial statements in this prospectus because Bausch &Lomb
Incorporated did not account for us as a single stand-alone business for all
periods presented. We cannot assure you that the adjustments and allocations we
have made in preparing our historical and pro forma consolidated financial
statements appropriately reflect our operations during the periods presented as
if we had operated as a stand-alone company.

                                       19


<PAGE>



We must comply with many federal, state and local rules and regulations

            Our business is affected by FDA regulations and similar foreign
regulations

     Much of our business depends on the comprehensive government regulation of
the drug development process of our customers. In the United States, from time
to time legislation is introduced in Congress to substantially modify
regulations administered by the FDA governing the drug approval process. In
Europe, the general trend has been toward establishing common standards for
clinical testing of new drugs, leading to changes in the various requirements
currently imposed by each country. Changes in regulation in the United States or
elsewhere, including a relaxation in the scope of regulatory requirements or the
introduction of simplified drug approval procedures, as well as anticipated
regulation, could materially and adversely affect the demand for our services
and products.

     Our endotoxin testing business is regulated as a medical device
manufacturer under FDA regulations. We received a "warning letter" from the FDA
earlier this year, citing quality control and certain other operational
deficiencies at our Charleston, South Carolina facility which the agency
considered to be in violation of the laws or regulations enforced by the FDA.
While the FDA has allowed our operation to continue to manufacture and sell the
LAL product line produced at the Charleston facility, we must make certain
prescribed changes to our production and quality control systems in order to
maintain our license to manufacture at that facility. We expect that we will be
able to meet all of the FDA's requirements in the near future, and have already
made considerable progress in addressing the non-compliance issues, but we
cannot assure you that the FDA will not conclude that our corrective actions are
inadequate. If the FDA finds that we have not corrected the deficiencies noted
in the warning letter, the agency could, among other things, issue another
warning letter, request that we enter into a consent decree, prohibit new
product introductions, institute a product recall, prohibit us from shipping
products until all deficiencies are corrected to its satisfaction or temporarily
revoke our manufacturing license, any of which could have a material adverse
effect on our results of operations.

       Our business may be affected by changes in the Animal Welfare Act and
related regulations

     Certain of our business activities are currently regulated by the Animal
Welfare Act, which governs the treatment of certain animals intended for use in
research. Much of our United States small animal research model business, which
is predominantly rats and mice, is not subject to regulation under the Animal
Welfare Act although we comply with licensing and registration requirement
standards set by the USDA for handling animals, including breeding, maintenance
and transportation of our animals. Birds, including the chickens used in our
United States SPF egg business, are also not subject to Animal Welfare Act
regulations. However, the USDA, which enforces the Animal Welfare Act, is
presently considering changing the regulations issued pursuant to the Animal
Welfare Act, in light of judicial action, to include rats, mice and birds within
its coverage. The Animal Welfare Act imposes a wide variety of specific
regulations on producers and users of animal subjects, most notably cage size,
shipping conditions and environmental enrichment methods. Should the USDA decide
to include rats, mice and birds, especially chickens, in its regulations, we
could be required to alter our production operation for these models, including
adding production capacity, new equipment and additional employees. While we
believe that application of the Animal Welfare Act to our rats, mice and SPF egg
businesses in the United States will not result in loss of net sales, margin or
market share, since all producers and users will be subject to the same
regulations, we cannot assure you that the USDA's actions will not adversely
affect our operations. In addition, although we do not anticipate the addition
of rats, mice and birds to the Animal Welfare Act to require significant
expenditures, we cannot assure you that the Animal Welfare Act, when amended,
will not be more stringent than we expect or that any future amendments to the
Animal Welfare Act or any other laws or regulations will not require significant
expenditures.

     In addition, some states have their own regulations, including general
anti-cruelty legislation, which establish certain standards in handling animals.
To the extent that we provide products and services overseas, we also have to
comply with foreign laws, such as the European Convention for the Protection of
Animals During International Transport and other anti-cruelty laws. The Council
of Europe is presently considering proposals to more stringently regulate animal
research.

                                       20


<PAGE>



     Noncompliance with such laws and regulations described above can result in
significant civil and criminal penalties.

   We have been engaged in legal disputes over environmental compliance at our
Florida Keys primate business for many years

     We have for two decades raised primates on two islands we purchased for
this purpose in the Florida Keys. Federal, state and local environmental and
wildlife authorities, as well as private environmental advocacy groups, have
challenged the continuing legality of this operation, citing damage to a
subsequently protected plant species, mangroves, resulting from the free range
conditions in which the primates have been maintained. To settle our disputes,
we have agreed to move the primates off the islands and thereafter transfer the
real property to the government. We have also agreed to refoliate the islands at
our cost, restoring them to their conditions prior to our arrival. While we
believe the refoliation process can be efficiently completed within a reasonable
period, we cannot assure you that the refoliation process will be successful, or
that there will not be any further disputes with environmental authorities
relating to this obligation in which restitution costs, damages and penalties
might be assessed.

   Our business may be affected by healthcare reform

     The healthcare industry is subject to changing political, economic and
regulatory influences that may affect the pharmaceutical and biotechnology
industries. Adoption and implementation of government healthcare reform, most
notably price controls on new drugs, may adversely affect research and
development expenditures by pharmaceutical and biotechnology companies,
resulting in a decrease of the business opportunities available to us. Many
foreign governments have also reviewed or undertaken healthcare reform, and we
cannot predict the impact that any pending or future healthcare reform proposals
may have on our business in foreign countries.

Our business may be disrupted by year 2000 problems

     Historically, many computerized systems have used two digits rather than
four to define the applicable year. Computer equipment and software and devices
with imbedded technology that are time-sensitive may recognize a date using "00"
as the year 1900 rather than the year 2000. This could result in system failure
or miscalculations causing disruptions of operations. This problem is generally
referred to as the "Year 2000 issue."

     We are currently engaged in a comprehensive project to upgrade our computer
software to make it Year 2000 compliant and we expect to be able to modify or
replace all affected systems in a manner which will minimize any detrimental
effects on operations. However, if such modifications and replacements are not
made, or are not completed in a timely manner, the year 2000 issue may have a
material adverse effect on our business, results of operations and financial
condition. To date, we have spent approximately $1.5 million on year 2000
projects and future expenditures are not expected to be significant. There can
be no assurances that the actual costs required to become year 2000 compliant
will not exceed our estimates. In addition, we are uncertain as to the extent
our customers and vendors may be affected by the Year 2000 issues and failure by
any of our customers/vendors, suppliers or other third parties with whom we do
business to be year 2000 compliant could have a material adverse effect on our
operations.

If we cannot obtain consents and approvals from third parties required as a
result of the change in control of our company, we may be adversely affected

     A substantial number of our material agreements, including supply
agreements, license agreements, joint venture agreements and service agreements
contain provisions that require consents and/or approvals from third parties,
including government entities, in case of a change in control of our company. In
addition, a substantial number of our leases contain provisions prohibiting such
change in control or permitting the landlord to terminate the lease upon a
change in control. The Recapitalization constituted a change of control as
defined in those agreements. We have received the necessary consents and/or
approvals from third parties to our material

                                       21


<PAGE>



agreements, except those from government entities. Consents from government
entities generally require post-transaction disclosure which is in process, and
we expect to receive such consents. We cannot assure you that all consents
and/or approvals that are triggered by the change in control of our company will
be obtained from government entities. We also cannot assure you that our
inability to obtain such consents will not have a material adverse effect on our
business.

Fraudulent transfer statutes may limit your rights as a noteholder

     Federal or state fraudulent transfer laws permit a court, if it makes
certain findings, to

     o avoid all or a portion of our obligations to you;

     o subordinate our obligations to you to our other existing and future
       indebtedness, entitling other creditors to be paid in full before any
       payment is made on the notes; and

     o take other action detrimental to you, including, in certain
       circumstances, invalidating the notes.

     If a court were to take any of these actions, we cannot assure you that you
would ever be repaid on the notes. Moreover, if the payments to certain of our
stockholders made pursuant to the recapitalization agreement with the proceeds
of the notes were determined to have violated the financial requirements in the
Delaware corporations statute, you will not be entitled under such law to
recover these payments from either the stockholders or the members of our board
of directors that authorized these payments.

     Under federal and state fraudulent transfer laws, in order to take any of
these actions, courts will typically need to find that, at the time the notes
were issued, we:

     (1)   issued the notes with the intent of hindering, delaying or defrauding
current or future creditors; or

     (2) received less than fair consideration or reasonably equivalent value
for incurring the indebtedness represented by the notes and

     (a)   were insolvent or were rendered insolvent by reason of the issuance
  of the notes;

     (b) were engaged, or about to engage, in a business or transaction for
  which our assets were unreasonably small; or

     (c) intended to incur, or believed (or should have believed) we would
  incur, debts beyond our ability to pay as such debts mature (as all of the
  foregoing terms are defined in or interpreted under such fraudulent transfer
  statutes).

     Different jurisdictions define "insolvency" differently. However, we
generally would be considered insolvent at the time we incurred the indebtedness
constituting the notes if (1) the fair market value (or fair saleable value) of
our assets is less than the amount required to pay our total existing debts and
liabilities (including the probable liability related to contingent liabilities)
as they become absolute or matured or (2) we were incurring debts beyond our
ability to pay as such debts mature. We cannot assure you as to what standard a
court would apply in order to determine whether we were "insolvent" as of the
date the notes were issued, and we cannot assure you that, regardless of the
method of valuation, a court would not determine that we were insolvent on that
date. Nor can we assure you that a court would not determine, regardless of
whether we were insolvent on the date the notes were issued, that the payments
constituted fraudulent transfers on another ground.

                                       22


<PAGE>



There are no public trading markets for the notes

     The notes are a new issue of securities for which there is currently no
active trading markets. If any of the notes are traded after they are initially
issued, they may trade at a discount from their initial offering price. The
trading price of the notes depends on prevailing interest rates, the market for
similar securities and other factors, including economic conditions and our
financial condition, performance and prospects.

                                       23


<PAGE>



                                THE TRANSACTIONS

The Recapitalization

     We entered into a recapitalization agreement dated as of July 25, 1999 with
Bausch & Lomb Incorporated ("B&L"), the Rollover Shareholders, Holdings, DLJMB
and CRL Acquisition LLC, a wholly owned subsidiary of DLJMB. The
recapitalization agreement provided for, among other things:

   o the contribution of all assets and liabilities (except as described below)
     relating to our business by the Rollover Shareholders to us in exchange for
     all of our capital stock

   o the exchange by the Rollover Shareholders of their shares of our capital
     stock for an equivalent ownership of shares of Holdings, so that Holdings
     will own 100% of our capital stock

   o the Rollover Shareholders retained certain assets including:

      o   substantially all of our cash and cash equivalents as of the day
          preceding the closing date

      o   all receivables owed by the Rollover Shareholders or their affiliates

   o the Rollover Shareholders retained certain liabilities including:

      o   all indebtedness for borrowed money outstanding immediately prior to
          the closing date

      o   all payables and other obligations owed to the Rollover Shareholders
          or any of their affiliates

      o   all tax liabilities relating to pre-closing periods

   o the formation by CRL Acquisition LLC of a wholly owned subsidiary
     ("Acquisition Subco"). CRL Acquisition LLC and Acquisition Subco were
     organized by DLJMB for the purpose of consummating the Recapitalization.
     The DLJMB Funds, management and other investors who previously purchased
     units contributed equity of $92.4 million in cash to CRL Acquisition LLC in
     exchange for all of the membership interests in CRL Acquisition LLC, and
     CRL Acquisition LLC then contributed equity of $92.4 million in cash to
     Acquisition Subco in exchange for all of the capital stock of Acquisition
     Subco

   o the merger of Acquisition Subco with and into Holdings, with Holdings being
     the surviving entity

   o the redemption by Holdings of 87.5% of its capital stock from the Rollover
     Shareholders for $400.0 million in cash and a subordinated discount note
     for $43.0 million issued by Holdings to the Rollover Shareholders; the
     Rollover Shareholders retained 12.5% of their equity investment with a fair
     market value of $13.2 million

     As a result of the Recapitalization, the DLJMB Funds, management and
certain other investors indirectly own (through CRL Acquisition LLC) 87.5% of
the capital stock of Holdings and the Rollover Shareholders own 12.5% of the
capital stock of Holdings.

The Sierra Acquisition

     We acquired Sierra for an initial purchase price of $24.0 million, of which
approximately $6 million was used to repay Sierra's existing debt. In addition,
we have agreed to pay:

   o up to $2.0 million in contingent purchase price if certain financial
     objectives are reached by December 31, 2000

                                       24


<PAGE>



   o up to $10.0 million in performance-based bonus payments if certain
     financial objectives are reached over the next five years, with no payment
     in any individual year to exceed $2.7 million

   o $3.0 million in retention and non-competition payments contingent upon the
     continuing employment of certain key scientific and management personnel
     through June 30, 2001

The Financing

     We consummated the Recapitalization and the Sierra Acquisition concurrently
(the "effective time"). In order to fund the consideration for the Transactions
and pay related fees and expenses:

   o we issued and sold units pursuant to an offering memorandum in the
     aggregate principal amount of $150.0 million

   o we obtained $105.6 million in equity investment, consisting of $92.4
     million in cash by the DLJMB Funds, management, and other investors and
     equity retained by the Rollover Shareholders with a fair value of $13.2
     million

   o we entered into a new $190.0 million senior secured credit facility,
     consisting of $160.0 million of term loan availability and $30.0 million of
     revolving loan availability with a group of financial institutions led by
     DLJ Capital Funding. At the effective time, we borrowed all of the term
     loans and $2.0 million of the revolving credit facility. We may use the
     remaining borrowing availability under the new credit facility for general
     corporate purposes, subject to certain conditions, including the absence of
     any material adverse change

   o Holdings issued senior discount debentures with warrants to the DLJMB Funds
     and other investors for $37.6 million

   o Holdings issued a subordinated discount note to the Rollover Shareholders
     for $43.0 million

     Concurrently with the effective time:

   o we dividended $270.0 million less fees and expenses, which included a
     portion of the amount received pursuant to the units previously offered and
     under our new credit facility, to Holdings

   o the Rollover Shareholders received cash in the amount of $400.0 million and
     a subordinated discount note for $43.0 million in exchange for 87.5% of
     their shares of capital stock of Holdings; the Rollover Shareholders
     retained 12.5% of their equity investment with a fair market value of $13.2
     million

     We funded the Sierra Acquisition with:

   o available cash

   o a portion of the net proceeds from the units

   o a portion of the borrowings under our new credit facility

                                       25


<PAGE>



     The following table sets forth the sources and uses of funds for the
Transactions on a pro forma basis.

<TABLE>

                                                                            As of September
                                                                               25, 1999
                                                                            ---------------
                                                                              (dollars in
                                                                              thousands)
<S>                                                                                <C>
Sources:
Available cash.............................................................   $  2,508
Borrowings under our new credit facility:
Revolving credit facility(1)...............................................      2,000
Term loans(2)..............................................................    160,000
Units(3)...................................................................    150,000
Senior discount debentures with warrants of Holdings(4)....................     37,613
Subordinated discount note of Holdings(5)..................................     43,000
Equity investment by DLJMB Funds, management and other investors...........     92,387
Rollover Shareholders' equity..............................................     13,198
                                                                              --------
   Total sources...........................................................   $500,706
                                                                              ========
Uses:
Recapitalization consideration.............................................   $443,000
Sierra acquisition consideration(6)........................................     24,000
Rollover Shareholders' equity..............................................     13,198
Debt issuance costs........................................................     13,237
Loans to management........................................................        920
Transaction fees and expenses(7)...........................................      6,351
                                                                              --------
   Total uses..............................................................   $500,706
                                                                              ========
</TABLE>

- -------------------

(1)  We have availability of $28.0 million under our new revolving credit
     facility, subject to customary borrowing conditions. See "Description of
     New Credit Facility."

(2)  Includes a senior secured Term Loan A facility of $40.0 million and a
     senior secured Term Loan B facility of $120.0 million.

(3)  Represents the issuance of $150.0 million of units previously offered.

(4   Investment by the DLJMB Funds.

(5)  Investment by the Rollover Shareholders.

(6)  Approximately $6 million was used to repay Sierra's existing debt.

(7)  Includes financial advisory and other fees, and legal, accounting and other
     professional fees. See "Certain Relationships and Related Transactions."

                                       26


<PAGE>



                                 USE OF PROCEEDS

     Our net proceeds from the offering of the units, after deducting the
expenses of the Transactions, including discounts and commissions to the initial
purchaser, were approximately $143.2 million. We dividended $270.0 million less
certain fees and expenses, consisting of a portion of the net proceeds from the
offering together with a portion of the $162.0 million of initial borrowings
under our new credit facility to Holdings. Holdings used the proceeds from this
dividend, together with its new equity investment by the DLJMB Funds, management
and other investors, proceeds from the issuance of its senior discount
debentures with warrants and its subordinated discount note, to fund the
Recapitalization and to pay certain fees and expenses related to the
Recapitalization. We used the remaining proceeds to fund the Sierra Acquisition
and pay certain related fees and expenses. See "The Transactions." We will not
receive any proceeds from the issuance of the new notes.

                                       27


<PAGE>



                                 CAPITALIZATION

     The following table presents Charles River's consolidated cash and cash
equivalents and capitalization as of September 25, 1999 (i) on a historical
basis and (ii) as adjusted to give pro forma effect to the Transactions. This
table should be read in conjunction with "The Transactions," "Use of Proceeds,"
"Management's Discussion and Analysis of Financial Condition and Results of
Operations," our consolidated financial statements and notes thereto included
elsewhere in this prospectus. See "Unaudited Pro Forma Condensed Consolidated
Financial Data."

     <TABLE>
                                                                                    As of September 25, 1999
                                                                                   -------------------------
                                                                                    Historical    Pro Forma
                                                                                    ----------    ---------
                                                                                     (dollars in thousands)
<S>
                                                                                          <C>          <C>

Cash and cash equivalents.........................................................      $  3,457     $  3,678
                                                                                        ========     ========
Debt:
New credit facility(1):
   Revolving credit facility......................................................      $     --       $2,000
   Term loans(2)..................................................................            --      160,000
Senior subordinated notes(3)......................................................            --      147,872
Capital lease obligations and other long-term debt................................         1,033        1,256
                                                                                        --------     --------
      Total debt..................................................................         1,033      311,128
                                                                                        --------     --------
Shareholder's equity:
   Common stock...................................................................             1            1
   Additional paid-in capital.....................................................        17,836      105,896
   Retained earnings..............................................................       142,422     (124,040)
   Loans to officers..............................................................            --         (920)
   Accumulated other comprehensive income.........................................       (11,294)     (11,294)
                                                                                        --------     --------
      Total shareholder's equity..................................................       148,965      (30,357)
                                                                                        --------     --------
      Total capitalization........................................................      $149,998     $280,771
                                                                                        ========     ========
</TABLE>

- -------------------

(1)  We have availability of $28.0 million under our new revolving credit
     facility, subject to customary borrowing conditions. See "Description of
     New Credit Facility."

(2)  Includes a senior secured Term Loan A facility of $40.0 million and a
     senior secured Term Loan B facility of $120.0 million.

(3)  Represents the issuance of $147.9 million of senior subordinated notes
     previously offered.


                                       28


<PAGE>



                 SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA

     The following table presents Charles River's selected historical
consolidated financial data and other data as of and for the fiscal years ended
December 31, 1994, December 30, 1995, December 28, 1996, December 27, 1997 and
December 26, 1998 and as of and for the nine months ended September 26, 1998 and
September 25, 1999. The selected historical consolidated financial data as of
and for the three fiscal years ended December 26, 1998 were derived from our
consolidated financial statements and the notes to those statements. The
selected historical consolidated financial data as of and for the fiscal years
ended December 31, 1994 and December 30, 1995 and as of and for the periods
ended September 26, 1998 and September 25, 1999 were derived from our unaudited
consolidated financial statements and the notes to those statements. In the
opinion of management, our unaudited consolidated financial statements include
all adjustments, consisting only of normal recurring adjustments, necessary for
a fair presentation of the financial condition and results of operations for
these periods. The information contained in this table should be read in
conjunction with "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and our consolidated financial statements and the
notes thereto contained elsewhere in this prospectus.

     <TABLE>

                                                          Fiscal Year(1)                          Nine Months Ended
                                     ------------------------------------------------------     ---------------------
                                                                                                September   September
                                       1994        1995        1996        1997        1998      26, 1998    25, 1999
                                      ------      ------     -------      ------      ------    ---------   ---------
                                                                  (dollars in thousands)

<S>                                  <C>         <C>         <C>         <C>         <C>         <C>         <C>
Income Statement Data:

   Net sales.......................  $135,747    $141,041    $155,604    $170,713    $193,301    $145,519    $161,096
   Cost of products sold and
      services provided............    85,092      86,404      97,777     111,460     122,547      91,041      97,230
   Selling, general and
      administrative expenses......    25,824      27,976      28,327      30,451      34,142      25,202      29,414
   Amortization of goodwill and
      other intangibles............       437         558         610         834       1,287       1,036       1,114
   Restructuring charges...........     4,788          --       4,748       5,892          --          --          --
                                      -------     -------     -------     -------     -------     -------     -------
   Operating income................    19,606      26,103      24,142      22,076      35,325      28,240      33,338
        Other income...............        --          --          --          --          --          --       1,441
   Interest income.................       149         634         654         865         986         659         496
   Interest expense................      (464)       (768)       (491)       (501)       (421)       (311)       (207)
   Gain/(loss) from foreign
      currency, net................        39         (68)         84        (221)        (58)       (127)       (143)
                                      -------     -------     -------     -------     -------     -------     -------
   Income before income taxes,
      minority interests and
      earnings from equity
      investments..................    19,330      25,901      24,389      22,219      35,832      28,461      34,925
   Provision for income taxes......     7,995      10,759      10,889       8,499      14,123      11,280      16,903
                                      -------     -------     -------     -------     -------     -------     -------
   Income before minority
      interests and earnings from
      equity investments...........    11,335      15,142      13,500      13,720      21,709      17,181      18,022
   Minority interests..............        --         (13)         (5)        (10)        (10)         (8)        (10)
   Earnings from equity
      investments..................     1,492       1,885       1,750       1,630       1,679       1,286       1,940
                                      -------     -------     -------     -------     -------     -------     -------
   Net income......................   $12,827     $17,014     $15,245     $15,340     $23,378     $18,459     $19,952
                                      =======     =======     =======     =======     =======     =======     =======

</TABLE>

                                       29


<PAGE>
<TABLE>
                                                          Fiscal Year(1)                          Nine Months Ended
                                     ------------------------------------------------------     ---------------------
                                                                                                September   September
                                       1994        1995        1996        1997        1998      26, 1998    25, 1999
                                      ------      ------     -------      ------      ------    ---------   ---------
                                                                  (dollars in thousands)

<S>                                  <C>         <C>         <C>         <C>         <C>         <C>         <C>
Other Data:
   Depreciation and
      amortization.................    $9,635      $9,717      $9,528      $9,703     $10,895      $7,932      $8,701
   Capital expenditures............     5,727      10,239      11,572      11,872      11,909       5,834       7,426
   Ratio of earnings to fixed
      charges(2)...................     21.9x       18.9x       18.8x       16.5x       25.8x       26.1x       33.7x
   Balance Sheet Data (at end
      of period):
   Cash and cash equivalents.......    $9,584     $15,336     $19,657     $17,915     $24,811     $25,184      $3,457
   Working capital.................    23,366      35,901      45,204      41,746      37,422      48,457      20,596
   Total assets....................   164,680     184,271     196,981     196,211     233,410     222,092     210,371
   Total debt(3)...................     4,142       4,626       1,645       1,363       1,582       1,462       1,033
   Total shareholder's equity......   126,000     142,212     153,818     149,364     168,259     165,324     148,965
      </TABLE>

- -------------------

(1)  Our fiscal year consists of twelve months ending on the Saturday closest to
     December 31.

(2)  For purposes of computing the ratio of earnings to fixed charges,
     "earnings" consist of income before income taxes, minority interests and
     earnings from equity investments less minority interests plus earnings from
     equity investments plus fixed charges. "Fixed charges" consist of interest
     expense on all indebtedness, amortization of deferred financing costs and
     one-third of rental expense from operating leases that we believe is a
     reasonable approximation of the interest component of rental expense.

(3)  Total debt includes all debt and capital lease obligations, including
     current portions.

                                       30


<PAGE>



                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

     The following discussion should be read in conjunction with our
consolidated financial statements and our unaudited pro forma condensed
consolidated financial statements, including the notes thereto, included
elsewhere in this prospectus.

     This discussion contains forward-looking statements which involve risks and
uncertainties. Our actual results may differ significantly from the results
discussed in the forward-looking statements. Factors that might cause such
differences include, but are not limited to, those discussed in "Risk Factors."


                                  CHARLES RIVER

Overview

     We are a global market leader in the commercial production and supply of
animal research models for use in the discovery, development and testing of new
pharmaceuticals. We have expanded our core capabilities in research models to
become a leading supplier of related biomedical products and services in several
specialized niche markets. Our research model capabilities and biomedical
products and services, together with our global distribution network, allow us
to meet the extensive needs of our broad customer base. Our customers consist
primarily of large pharmaceutical companies, including the ten largest global
pharmaceutical companies based on 1998 revenues, as well as biotechnology,
animal health, medical device and diagnostic companies and hospitals, academic
institutions and government agencies. Our facilities are located in 18
countries, including the United States, Canada, Japan and many European
countries.

     We operate in two segments for financial reporting purposes--research
models and biomedical products and services. On a pro forma basis, research
models accounted for 62%, and biomedical products and services accounted for
38%, of net sales for the twelve-month period ended September 25, 1999. Over the
same period, we reported pro forma net sales of $230.5 million and pro forma
Adjusted EBITDA of $57.0 million. Adjusted EBITDA represents EBITDA, as defined,
adjusted for non-recurring, non-cash and cash items, as appropriate, which are
more fully described on page 12. EBITDA, as defined, represents operating income
plus depreciation and amortization. Adjusted EBITDA is presented because we
believe it is a meaningful indicator of Charles River's operating performance,
and it is the measure by which certain of the covenants under the new credit
facility are computed. EBITDA, as defined, and Adjusted EBITDA are not intended
to represent cash flows for the period, nor are they presented as an alternative
to operating income or as an indicator of operating performance. They should not
be considered in isolation or as a substitute for measures of performance
prepared in accordance with GAAP in the United States and are not indicative of
operating income or cash flow from operations as determined under GAAP. Our
method of computation may not be comparable to other similarly titled measures
of other companies.

     Sierra, which we recently acquired, is a pre-clinical biomedical services
company with expertise in drug safety and efficacy assessment studies using
research models. Sierra offers its services to biotechnology, pharmaceutical and
medical device companies that are principally focused on conducting studies
needed in the early stages of drug development, especially those that require
highly specialized scientific capabilities. Sierra has expertise in conducting
critical developmental studies on potential new drugs and devices using research
models, including short-term evaluations of potential new treatment for human or
animal disease conditions.

     Net Sales. We recognize net sales when a product is shipped or as services
are rendered. Over the past three years, unit volume of small animal research
models has increased modestly in North America and has decreased modestly in
Europe. During the same period, sales in both North America and Europe have
increased, principally as a result of price increases and a shift in mix towards
higher priced research models. In recent years, we have increased our focus on
the sale of specialty research models, such as special disease models, which
have contributed to additional sales growth.

                                       31


<PAGE>



     Our customers typically place orders for research models with less than a
week's lead time. Meeting such demand requires efficient inventory management
and strong customer service support. We improved inventory availability in the
last two years through better forecasting and production mix, and most
importantly, improved biosecurity, thereby reducing the possibility of
contaminations.

     Biomedical products and services have grown at a compounded rate of 31%
from 1996 to 1998 and accounted for 30% of our sales in 1998, compared to 22% in
1996. Our growth in this business demonstrates our ability to capitalize on our
core research model technology and enter into related product development
activities undertaken by our customers.

     Pricing. We maintain published list prices for all of our research models,
biomedical products and certain of our services. We also have pricing agreements
with our customers which provide certain discounts, usually based on volume.
Many of our services are based on customized orders and are priced accordingly.
While pricing has been competitive, certain of our products are priced at a
premium due to the higher quality, better availability, and superior customer
support that our customers associate with our products.

     Biosecurity. Biosecurity is our highest operational priority. Prior
breaches of biosecurity have adversely affected our results of operations, and
we cannot assure you that future breaches would not materially affect our
results of operations. A biosecurity breach typically results in additional
expenses from the need to "recycle" or clean up the contaminated room, which in
turn results in inventory loss, clean-up and start-up costs, and can reduce net
sales as a result of lost customer orders and credits for prior shipments. We
experienced several significant contaminations in 1996 and a few significant
contaminations in 1997, both in our barrier rooms for research models and in our
poultry houses for SPF eggs. As a result, our net sales in 1996 and 1997 were
adversely affected by our inability to fulfill customer orders and our expenses
were increased during those periods by the costs associated with cleaning up the
contaminations. Since December 31, 1996, we have made over $6.0 million of
capital expenditures designed to strengthen our biosecurity, primarily by
upgrading our production facilities. In addition, we have made significant
changes to our operating procedures for barrier rooms and poultry houses
designed to further minimize the risks of contamination, including, for example,
increasing the frequency of replacing masks and gowns, and most importantly,
increasing awareness and training among our employees. These improvements to our
operating procedures increased annual ongoing biosecurity related expenses by
approximately $0.5 million in 1998. While we cannot assure you that we will not
experience future significant barrier room or poultry house contaminations in
the future, these changes have contributed to our absence of significant
contaminations during 1998 and the first nine months of 1999.

     Acquisitions. Since December 31, 1996, we have successfully acquired and
integrated four companies, which contributed $6.3 million in sales in 1998, or
3.3% of total sales. We acquired Sierra for an initial purchase price of $24.0
million, of which approximately $6 million was used to repay Sierra's existing
debt. In addition, we have agreed to pay (a) up to $2.0 million in contingent
purchase price if certain financial objectives are reached by December 31, 2000,
(b) up to $10.0 million in performance-based bonus payments if certain financial
objectives are reached over the next five years, with no payment in any
individual year to exceed $2.7 million, and (c) $3.0 million in retention and
non-competition payments contingent upon the continuing employment of certain
key scientific and managerial personnel through June 30, 2001.

     The $2.0 million in contingent purchase price will, if paid, increase
goodwill and/or other identifiable intangibles by the same amount and not affect
our results of operations except through the subsequent related amortization
expense and any interest expense related to any borrowings necessary to finance
such payment. The $10.0 million in performance-based bonus payments, will, if
paid, be expensed during the period in which it becomes reasonably certain that
such financial objectives will be achieved. The $3.0 million in retention and
non-competition payments will be expensed over the next two years. The
contingent purchase price and performance-based bonus payments are not reflected
in the pro forma financial data included elsewhere herein because they are not
considered reasonably estimable; the retention and non-competition payments are
not included in the pro forma financial data as they are considered
non-recurring.

                                       32


<PAGE>



     Joint Ventures. We have two unconsolidated joint ventures which are
accounted for under the equity method. Our largest is Charles River Japan, which
we own 50%/50% with Ajinimoto Co., Inc., and is an extension of our research
model business. Our royalty agreement provides us with 3% of the sales of
locally produced research models. We also receive dividends based on our
pro-rata share of 50% of net income. Dividends received from Charles River Japan
were $0.7 million, $0.8 million and $0.7 million in 1996, 1997 and 1998,
respectively. In addition, dividends for 1999 in the amount of $0.8 million have
been received. Our other unconsolidated joint venture is Charles River Mexico,
an extension of our SPF eggs business, which is not significant to our
operations.

     Restructuring Program. During 1996 and 1997, we implemented two
restructuring programs in conjunction with B&L which were designed to: reduce
capacity and consolidate facilities in the SPF eggs and small research models
product lines; reduce staff costs in the United States and Europe; relocate our
primate breeding operation in the Florida Keys to new locations and refoliate
the related islands in response to a June 1997 court order; and close and
consolidate several small product lines. In connection with the 1997
restructuring program, we entered into certain severance arrangements that call
for payments over an extended period of time. Further, due to complications
associated with our plan to relocate our primates from the Florida Keys to
Miami, Florida, the relocation has taken longer than anticipated to complete.
Specifically, we were particularly sensitive to moving the Florida Keys primates
in a controlled and unrushed manner, in order to minimize mortality and breeding
disruption. We believe that the restructuring programs have allowed us to
significantly improve operations in 1998 and the first nine months of 1999.

     Allocation of Costs from Bausch & Lomb. Historically, B&L charged us for
certain direct expenses, including insurance, information technology and other
miscellaneous expenses, based upon actual charges incurred on our behalf.
However, these charges and estimates are not necessarily indicative of the costs
and expenses which would have resulted had we incurred these costs as a
stand-alone entity. The actual amounts of expenses we incur in future periods
may vary significantly from these allocations and estimates. We expect to incur
other incremental expenses as a stand-alone company. See "Unaudited Pro Forma
Condensed Consolidated Financial Data."

     The Transactions. The Recapitalization, which was consummated on September
29, 1999, was accounted for as a leveraged recapitalization, which will have no
impact on the historical basis of our assets and liabilities. The Sierra
Acquisition was accounted for under the purchase method of accounting with the
purchase price allocated to the assets and liabilities of Sierra based on an
estimate of their fair value, with the remainder, if any, being allocated to
goodwill. On a pro forma basis, we incurred various costs of approximately $19.6
million (pre-tax) in connection with consummating the Transactions. The portion
of these costs that represents deferred financing costs will be capitalized and
amortized over the life of the related financing. A portion of the expenses
related to the Recapitalization will be charged to retained earnings while the
portion related to the Sierra Acquisition will be included in the purchase
price.

     Deferred Tax Assets. In conjunction with the Recapitalization, we will make
an election under section 338(h)(10) of the Internal Revenue Code of 1986, as
amended. Such election results in a step-up in the tax basis of the underlying
assets. The resulting net deferred tax asset of $88.1 million is expected to be
realized over 15 years through future tax deductions which are expected to
reduce future tax payments. See Note (e) to the Unaudited Pro Forma Condensed
Consolidated Balance Sheet included in the Unaudited Pro Forma Condensed
Consolidated Financial Data.

     Results of Operations

     The following table summarizes historical results of operations as a
percentage of net sales for the periods shown:

     <TABLE>

                                                            Fiscal Year Ended                 Nine Months Ended
                                                ---------------------------------------------------------------------
                                                 December 28, December 27, December 26,  September 26,  September 25,
                                                     1996         1997         1998          1998           1999
                                                ------------- ------------ ------------  -------------  -------------
<S>                                                <C>          <C>          <C>            <C>            <C>
Net sales........................................  100.0%       100.0%       100.0%         100.0%         100.0%
Costs of products sold and service provided......   62.8         65.3         63.4           62.6           60.4
Selling, general and administrative expenses.....   18.2         17.8         17.7           17.3           18.3
Amortization of goodwill and other intangibles...    0.4          0.5          0.7            0.7            0.7
Restructuring charges............................    3.1          3.5           --             --             --
                                                   -----        -----        -----          -----          -----
Operating income.................................   15.5         12.9         18.2           19.4           20.6
                                                   -----        -----        -----          -----          -----
Net income.......................................    9.8%         9.0%        12.1%          12.7%          12.4%
                                                   =====        =====        =====          =====          =====
</TABLE>

                                       33


<PAGE>

Nine Months ended September 25, 1999 Compared to Nine Months ended
September 26, 1998

     Net Sales. Net sales for the first nine months of 1999 were $161.1 million,
an increase of $15.6 million, or 10.7%, from $145.5 million in the first nine
months of 1998.

     Research Models. Net sales of research models for the first nine months of
1999 were $109.2 million, an increase of $6.0 million, or 5.8%, from $103.2
million for the first nine months of 1998. Sales increased due to the increase
in small animal research model sales in North America and Europe, resulting from
improved pricing, a more favorable product mix and an increase in unit volume.
We also experienced growth in our primate import and conditioning business,
mainly due to pricing.

     Biomedical Products and Services. Net sales of biomedical products and
services for the first nine months of 1999 were $51.9 million, an increase of
$9.6 million, or 22.7%, from $42.3 million for the first nine months of 1998. At
the beginning of the second quarter of 1998, we acquired two new businesses that
contributed $2.8 million of this sales growth. The remaining increase was due to
significant sales increases of Special Animal Services and Endotoxin testing
kits, and sales from our facility management contracts, primarily due to better
customer awareness of our outsourcing solutions.

     Cost of Products Sold and Services Provided. Cost of products sold and
services provided for the first nine months of 1999 was $97.2 million, an
increase of $6.2 million, or 6.8%, from $91.0 million for the first nine months
of 1998.

     Research Models. Cost of products sold and services provided for research
models for the first nine months of 1999 was $65.4 million, an increase of $1.7
million, or 2.7%, compared to $63.7 million for the first nine months of 1998.
Cost of products sold and services provided for the first nine months of 1999
was 59.9% of net sales compared to 61.7% of net sales for the first nine months
of 1998. Cost of products sold and services provided increased at a lower rate
than net sales due to the more favorable product mix and better pricing, as well
as improved capacity utilization.

     Biomedical Products and Services. Cost of products sold and services
provided for biomedical products and services for the first nine months of 1999
was $31.8 million, an increase of $4.5 million, or 16.5%, compared to $27.3
million for the first nine months of 1998. Cost of products sold and services
provided for the first nine months of 1999 was 61.3% of net sales compared to
64.5% of net sales for the first nine months of 1998. Cost of products sold and
services provided increased at a lower rate than net sales, due to improved
utilization in our SPF egg business, and a favorable sales mix in our Special
Animal Services and biosafety testing businesses.

     Selling, General and Administrative Expenses. Selling, general and
administrative expenses for the first nine months of 1999 were $29.4 million, an
increase of $4.2 million, or 16.7% from $25.2 million for the first nine months
of 1998. Selling, general and administrative expenses for the first nine months
of 1999 were 18.2% of net sales, compared to 17.3% of net sales for the first
nine months of 1998. Selling, general and administrative expenses also included
research and development expense of $0.4 million for the first nine months of
1999 compared to $0.8 million for the same period in 1998.

                                       34


<PAGE>



     Research Models. Selling, general and administrative expenses for research
models for the first nine months of 1999 were $15.7 million, an increase of $2.5
million, or 18.9%, compared to $13.2 million, for the first nine months of 1998.
Selling, general and administrative expenses for the first nine months of 1999
were 14.4% of net sales, compared to 12.8% for the first nine months of 1998.
The increase was attributable to additional worldwide marketing efforts,
additional salespeople in the United States and the impact of selling efforts
in Europe for ESD, a business acquired at the end of 1998.

     Biomedical Products and Services. Selling, general and administrative
expenses for biomedical products and services for the first nine months of 1999
were $7.5 million, an increase of $0.9 million, or 13.6%, compared to $6.6
million for the first nine months of 1998. Selling, general and administrative
expenses for the first nine months of 1999 decreased to 14.5% of net sales,
compared to 15.6% of net sales for the first nine months of 1998, due to the
significant increase in sales.

     Unallocated Corporate Overhead. Unallocated corporate overhead, which
consists of various corporate expenses, was $6.2 million for the first nine
months of 1999, an increase of $0.8 million, or 14.8%, compared to $5.4 million
for the first nine months of 1998. The increase resulted from a number of items,
the most significant of which related to the write down of a small investment in
one of our joint ventures, which is undergoing significant financial
difficulties.

     Amortization of Goodwill and Other Intangibles. Amortization of goodwill
and other intangibles for the first nine months of 1999 was $1.1 million, an
increase of $0.1 million, or 10.0%, from $1.0 million for the first nine months
of 1998. The increase was due to the effect of three recent acquisitions, two in
April 1998 and one in December 1998.

     Restructuring Charges. There were no restructuring charges during the nine
months ended September 25, 1999 and September 26, 1998. During the nine months
ended September 25, 1999, we charged $0.8 million of previously reserved for
costs against the previously recorded restructuring reserves. The remaining
reserves, which primarily relate to continuing severance payments and relocation
and refoliation costs, are expected to be fully utilized by the end of 1999.

     Operating Income. Operating income for the first nine months of 1999 was
$33.3 million, an increase of $5.1 million, or 18.1%, from $28.2 million in the
first nine months of 1998. Operating income for the first nine months of 1999
was 20.7% of net sales, compared to 19.4% of net sales for the first nine months
of 1998. Operating income increased in total and as a percentage of net sales
for the reasons described below.

     Research Models. Operating income from sales of research models for the
first nine months of 1999 was $28.0 million, an increase of $1.7 million, or
6.5%, from $26.3 million in the first nine months of 1998. Operating income from
sales of research models for the first nine months of 1999 was 25.5% of net
sales, unchanged from the first nine months of 1998.

     Biomedical Products and Services. Operating income from sales of biomedical
products and services for the first nine months of 1999 was $11.5 million, an
increase of $4.2 million, or 57.5%, from $7.3 million in the first nine months
of 1998. Operating income from sales of biomedical products and services for the
first nine months of 1999 increased to 22.2% of net sales, compared to 17.3% of
net sales for the first nine months of 1998, due to improvements in pricing,
sales mix and cost savings achieved.

     Other Income. During the third quarter of 1999, we recorded a $1.4 million
gain on the sale of two small facilities, one located in Florida, and the other
located in the Netherlands.

     Income Taxes. The effective tax rate of 48.4% for the first nine months of
1999 as compared to 39.6% for the first nine months of 1998, reflects the
remittance of cash dividends of $20.7 million from our foreign subsidiaries
which, in turn, were remitted to B&L. The related amounts were previously
considered permanently reinvested in the foreign jurisdictions for U.S. income
tax reporting purposes, therefore, we were required to provide additional taxes
upon their repatriation to the U.S. In addition, during the nine months ended
September 25, 1999, an election was made by B&L to treat certain foreign
entities as branches for United States income tax purposes. As a result, all
previously untaxed accumulated earnings of such entities became immediately
subject to tax in the United States. The receipt of the cash

                                       35


<PAGE>



dividends from the foreign subsidiaries and the foreign tax elections made
resulted in incremental United States taxes of $2.0 million, net of foreign tax
credits, during the nine months ended September 25, 1999.

     Net Income. Net income for the first nine months of 1999 was $20.0 million,
an increase of $1.5 million, or 8.1%, from $18.5 million in the first nine
months of 1998. The increase was attributable to the factors described above.

Fiscal 1998 Compared to Fiscal 1997

     Net Sales. Net sales in 1998 were $193.3 million, an increase of $22.6
million, or 13.2%, from $170.7 million in 1997.

     Research Models. Net sales of research models in 1998 were $134.6 million,
an increase of $9.4 million, or 7.5%, from $125.2 million in 1997. Sales
increased due to the increase in small animal research model sales in North
America, resulting from improved pricing and a more favorable product mix. In
addition, in 1998 we were not affected by the significant contaminations which
negatively impacted sales in 1997. Overall, unit volumes remained relatively
flat, with modest increases in North America offset by modest declines in
Europe. Our net sales in our primate import and conditioning business also
increased as a result of expansion in our boarding and service business.

     Biomedical Products and Services. Net sales of biomedical products and
services in 1998 were $58.7 million, an increase of $13.2 million, or 59.7%,
from $45.5 million in 1997. During 1998 we acquired three businesses that
contributed $6.1 million of our sales growth. The remaining increase was due to
increased sales across all of our product lines, and in particular our Special
Animal Services and Endotoxin testing businesses.

     Cost of Products Sold and Services Provided. Cost of products sold and
services provided in 1998 was $122.5 million, an increase of $11.0 million, or
9.9%, from $111.5 million in 1997.

     Research Models. Cost of products sold and services provided for research
models for 1998 was $85.8 million, an increase of $3.3 million, or 4.0%,
compared to $82.5 million in 1997. Cost of products sold and services provided
for 1998 was 63.7% of net sales compared to 65.9% for 1997. Cost of products
sold and services provided increased for 1998 compared to 1997, but at a slower
rate than net sales due principally to better product mix and pricing as well as
greater economies of scale and improved production efficiencies.

     Biomedical Products and Services. Cost of products sold and services
provided for biomedical products and services for 1998 was $36.7 million, an
increase of $7.7 million, or 26.6%, compared to $29.0 million in 1997. Cost of
products sold and services provided was 62.5% of net sales in 1998 compared to
63.7% in 1997. Cost of products sold and services provided increased for 1998
compared to 1997, but at a slower rate than net sales due principally to cost
savings.

     Selling, General and Administrative Expenses. Selling, general and
administrative expenses in 1998 were $34.1 million, an increase of $3.6 million,
or 11.8%, from $30.5 million in 1997. Selling, general and administrative
expenses in 1998 were 17.6% of net sales compared to 17.9% of net sales in 1997.
These expenses increased mainly in line with sales. Selling, general and
administrative expenses also included research and development expense of $1.4
million in 1998, which was the same amount as in 1997.

     Research Models. Selling, general and administrative expenses for research
models for 1998 were $18.1 million, a decrease of $1.5 million, or 7.7%,
compared to $19.6 million, for 1997. Selling, general and administrative
expenses for 1998 decreased to 13.4% of net sales, compared to 15.7% for 1997
due primarily to the significant increase in sales.

     Biomedical Products and Services. Selling, general and administrative
expenses for biomedical products and services for 1998 were $9.7 million, an
increase of $2.8 million, or 40.6%, compared to $6.9 million for 1997. Selling,
general and administrative expenses for 1998 were 16.5% of net sales, compared
to 15.2% of net sales for 1997. The increase was principally attributable to the
acquisition of two small businesses in April 1998.

                                       36


<PAGE>



     Unallocated Corporate Overhead. Unallocated corporate overhead was $6.3
million for 1998, an increase of $2.3 million, or 57.5%, compared to $4.0
million in 1998. The increase was due to an increase in our supplemental
retirement program costs, along with an increase in management bonuses for 1998.

     Amortization of Goodwill and Other Intangibles. Amortization of goodwill
and other intangibles in 1998 was $1.3 million, an increase of $0.5 million, or
62.5%, from $0.8 million in 1998. The increase was due to the acquisition of two
small service businesses in April 1998.

     Restructuring Charges. There were no restructuring charges in 1998 compared
to $5.9 million in 1997 associated with the restructuring program discussed
above. During 1998, we charged $1.6 million of previously reserved for costs
against the previously recorded restructuring reserves.

     Operating Income. Operating income in 1998 was $35.3 million, an increase
of $13.2 million, or 59.7%, from $22.1 million in 1997. Operating income in 1998
was 18.3% of net sales compared to 12.9% of net sales in 1997.

     Research Models. Operating income from research models in 1998 was $30.5
million, an increase of $10.9 million, or 55.6%, from $19.6 million in 1997.
Operating income from sales of research models in 1998 increased to 22.7% of net
sales, compared to 15.7% of net sales in 1997 for the reasons described above.

     Biomedical Products and Services. Operating income from biomedical products
and services in 1998 was $11.1 million, an increase of $4.6 million, or 70.8%,
from $6.5 million in 1997. Operating income increased to 18.9% of net sales,
compared to 14.3% of net sales in 1997 for the reasons described above.

     Income Taxes.  The effective tax rate in 1998 was 39.4% compared to 38.3%
in 1997.

     Net Income. Net income in 1998 was $23.4 million, an increase of $8.1
million, or 52.9%, from $15.3 million in 1997. The increase was attributable to
the factors referred to above.

Fiscal 1997 Compared to Fiscal 1996

     Net Sales. Net sales in 1997 were $170.7 million, an increase of $15.1
million, or 9.7%, from $155.6 million in 1996.

     Research Models. Net sales of research models in 1997 were $125.2 million,
an increase of $3.9 million, or 3.2%, from $121.3 million in 1996. Sales
increased due to the increase in small animal research model sales in North
America, primarily due to improved pricing and a favorable product mix which
more than offset slight unit volume declines in Europe and flat unit volume
sales in North America. The unit volume declines were partially due to a number
of contaminations which occurred in 1996 and several contaminations in 1997,
which mostly impacted net sales in 1997. In addition, net sales in 1997 were
negatively impacted by foreign currency translations. Sales in our primate
business increased after our imported primates business was reacquired at the
beginning of the third quarter of 1996.

     Biomedical Products and Services. Net sales of biomedical products and
services in 1997 were $45.5 million, an increase of $11.2 million, or 32.7%,
from $34.3 million in 1996. The increase was due to increased sales of SPF eggs,
an increase in facility management contracts and the acquisition of our French
distributor for Endotoxin testing kits in the beginning of the second quarter of
1996.

     Cost of Products Sold and Services Provided. Cost of products sold and
services provided in 1997 was $111.5 million, an increase of $13.7 million, or
14.0%, from $97.8 million in 1996.

     Research Models. Cost of products sold and services provided for research
models for 1997 was $82.5 million, an increase of $6.5 million, or 8.6%,
compared to $76.0 million in 1996. Cost of products sold and services provided
for 1997 was 65.9% of net sales compared to 62.7% for 1996. Cost of products
sold and services provided increased for

                                       37


<PAGE>



1997 compared to 1996 at a greater rate than sales due principally to additional
costs associated with biosecurity and the prevention of contaminations.

     Biomedical Products and Services. Cost of products sold and services
provided for biomedical products and services for 1997 was $29.0 million, an
increase of $7.2 million, or 33.0%, compared to $21.8 million in 1996. Cost of
products sold and services provided for 1997 was 63.7% of net sales in 1997
compared to 63.6% in 1996.

     Selling, General and Administrative Expenses. Selling, general and
administrative expenses in 1997 were $30.5 million, an increase of $2.2 million,
or 7.8%, from $28.3 million in 1996. Selling, general and administrative
expenses in 1997 were 17.9% of net sales compared to 18.2% of net sales in 1996.
Selling, general and administrative expenses also included research and
development expense of $1.4 million in 1997, compared to $1.5 million in 1996.

     Research Models. Selling, general and administrative expenses for research
models for 1997 were $19.6 million, a decrease of $0.1 million, or 0.5%,
compared to $19.7 million, for 1996. Selling, general and administrative
expenses for 1997 were 15.7% of net sales, compared to 16.2% for 1996.

     Biomedical Products and Services. Selling, general and administrative
expenses for biomedical products and services for 1997 were $6.9 million, an
increase of $1.5 million, or 27.8%, compared to $5.4 million for 1996. Selling,
general and administrative expenses for 1997 were 15.2% of net sales, compared
to 15.7% of net sales for 1996.

     Unallocated Corporate Overhead.  Corporate overhead was $4.0 million for
1997, an increase of $0.8 million, or 25.0%, compared to $3.2 million in 1996.

     Amortization of Goodwill and Other Intangibles. Amortization of goodwill
and other intangibles in 1997 was $0.8 million, an increase of $0.2 million, or
33.3%, from $0.6 million in 1996. The increase was due to the acquisition of our
French distributor for Endotoxin testing kits in the beginning of the second
quarter of 1996.

     Restructuring Charges. Restructuring charges in 1997 were $5.9 million, an
increase of $1.2 million, or 25.5%, from $4.7 million in 1996. The 1997
restructuring charges consisted of the following: plant closings and personnel
reductions in our SPF egg business, severance costs and relocation costs for our
purpose bred primates in the Florida Keys and related refoliation costs and
staff reductions and associated severance costs in Europe and the United States.
The 1996 restructuring charges consisted of the following: plant closings in the
United States and Europe of the small animal business, personnel reductions at
our European headquarters, administrative staff reductions at the SPF egg
business, and shutdown or consolidations of several other small businesses.
During 1997, we charged $3.2 million of costs against the reserves recorded in
1997. The restructuring activities provided for in 1996 were completed by the
end of the year with actual charges approximating those originally provided for.

     Operating Income. Operating income in 1997 was $22.1 million, a decrease of
$2.0 million, or 8.3%, from $24.1 million in 1996. Operating income in 1997 was
13.0% of net sales compared to 15.5% of net sales in 1996. Operating income
decreased in total and as a percentage of net sales due to the factors described
above.

     Research Models. Operating income from research models in 1997 was $19.6
million, a decrease of $4.5 million, or 18.7%, from $24.1 million in 1996.
Operating income from sales of research models in 1997 decreased to 15.7% of net
sales, compared to 19.9% of net sales in 1996 due primarily to biosecurity costs
and higher restructuring charges.

     Biomedical Products and Services. Operating income from biomedical products
and services in 1997 was $6.5 million, an increase of $3.3 million, or 103.1%,
from $3.2 million in 1996. Operating income from sales of biomedical products
and services in 1997 increased to 14.3% of net sales, compared to 9.3% of net
sales in 1996 due to the significant increase in sales.

     Income Taxes.  The effective tax rate in 1997 was 38.3%, compared to 44.6%
in 1996, due to higher foreign statutory tax rates in 1996.

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     Net Income. Net income in 1997 was $15.3 million, an increase of $0.1
million, or 0.7%, from $15.2 million in 1996. The increase was attributable to
the factors referred to above.

Liquidity and Capital Resources

     Post-Transactions

     Our principal sources of liquidity are cash flow from operations and
borrowings under our new credit facility. Our principal uses of cash are debt
service requirements as described below, capital expenditures, working capital
requirements and acquisitions.

     On a pro forma basis, after giving effect to the Transactions, as of
September 25, 1999, we had:

   o total consolidated indebtedness of approximately $311.1 million

   o approximately $28.0 million of borrowings available under our new credit
     facility, subject to customary conditions

     Our significant debt service obligations following the Transactions could,
under certain circumstances, have material consequences to our security holders.
See "Risk Factors--Risks relating to our debt."

     The term loan facility under the new credit facility consists of a $40.0
million term loan A facility and a $120.0 million term loan B facility. The term
loan A facility matures six years after the closing date of the facility and the
term loan B facility matures eight years after the closing date of the facility.

     The new credit facility also includes a $30.0 million revolving credit
facility which matures six years after the closing date of the facility. The
revolving credit facility may be increased by up to $25.0 million at our
request, which will only be available to us under certain circumstances, subject
to a successful syndication under the same terms and conditions of the $30.0
million revolving credit facility.

     Loans under the term loan A facility and the revolving facility will bear
interest, at our option, at the alternate base rate or the reserve adjusted
LIBOR rate plus, in each case, applicable margins of 3.00% for LIBOR loans and
1.75% for base rate loans. Loans under the term loan B facility will bear
interest, at our option, at the alternate base rate or the reserve adjusted
LIBOR rate plus, in each case, applicable margins of 3.75% for LIBOR loans and
2.50% for base rate loans. We pay commitment fees in an amount equal to 0.50%
per annum on the daily average unused portion of the revolving credit facility.
Such fees are payable quarterly in arrears and upon the maturity or termination
of the revolving credit facility. Beginning approximately six months after the
closing date of the new credit facility, the applicable margins applicable to
loans under the term loan A facility and the revolving facility and commitment
fees will be determined based on the ratio (the "Leverage Ratio") of
consolidated total debt to consolidated EBITDA (as defined in the new credit
facility) of our company and our restricted subsidiaries (as defined in the new
credit facility).

     All of our future domestic restricted subsidiaries will be guarantors of
the new credit facility. Our obligations under the new credit facility are or
will be secured by:

   o all of our stock,

   o all of our existing and after-acquired personal property and all the
     existing and after-acquired personal property of our future domestic
     restricted subsidiaries, including a pledge of all of the equity interests
     of all our future restricted subsidiaries held by us or any of our
     restricted subsidiaries and no more than 65% of the equity interests of any
     foreign restricted subsidiary, and all intercompany debt in our favor,

   o first-priority perfected liens on all of our material existing and
     after-acquired real property fee and leasehold interests, subject to
     customary permitted liens (as defined in the new credit facility), and

   o a negative pledge on all of our and our subsidiaries' assets.

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     The new credit facility contains customary covenants and restrictions on
our ability to engage in certain activities, including, but not limited to:

   o limitations on other indebtedness, liens, investments and guarantees,

   o restrictions on dividends and redemptions and payments on subordinated debt
      and

   o restrictions on mergers and acquisitions, sales of assets and leases. The
     new credit facility also contains customary events of default and a
     cross-default to indebtedness of Holdings.

     The notes mature in 2009. Interest on the notes is payable semi-annually in
cash. The notes contain customary covenants and events of default, including
covenants that limit our ability to incur debt, pay dividends and make certain
investments.

     We anticipate that we will spend approximately $15.0 million on a pro forma
basis for capital expenditures in 1999. The new credit facility contains
restrictions on our ability to make capital expenditures. Based on current
estimates, management believes that the amount of capital expenditures permitted
to be made under the new credit facility will be adequate to grow our business
according to our business strategy and to maintain the properties and businesses
of our continuing operations.

     Working capital totaled $31.9 million at September 25, 1999 on a pro forma
basis. Management believes that we will continue to require working capital
consistent with past experience and that current levels of working capital,
together with borrowings available under the new credit facility, will be
sufficient to meet expected liquidity needs in the near term.

     We anticipate that our operating cash flow, together with borrowings under
the new credit facility, will be sufficient to meet our anticipated future
operating expenses, capital expenditures and debt service obligations as they
become due. However, our ability to make scheduled payments of principal of, to
pay interest on or to refinance our indebtedness and to satisfy our other debt
obligations will depend upon our future operating performance, which will be
affected by general economic, financial, competitive, legislative, regulatory,
business and other factors beyond our control. See "Risk Factors."

     From time to time we will continue to explore additional financing methods
and other means to lower our cost of capital, which could include stock issuance
or debt financing and the application of the proceeds therefrom to the repayment
of bank debt or other indebtedness. In addition, in connection with any future
acquisitions, we may require additional funding which may be provided in the
form of additional debt or equity financing or a combination thereof. There can
be no assurance that any such additional financing will be available to us on
acceptable terms.

     In connection with the Transactions, Holdings issued $37.6 million
aggregate principal amount of 16.27% senior discount debentures with warrants to
the DLJMB Funds and other investors. The senior discount debentures accrete from
their original issue price of $37.6 million to $82.3 million by October 1, 2004.
Thereafter, interest is payable in cash. The senior discount debentures mature
on April 1, 2010. The senior discount debentures contain covenants and events of
default substantially similar to those contained in the notes. In addition,
Holdings issued to the Rollover Shareholders a subordinated discount note with
an original issue price of $43.0 million. The subordinated discount note
accretes at the rate of 12% prior to October 1, 2004 and thereafter at 15% to an
aggregate principal amount of $175.3 million at maturity on October 1, 2010. The
subordinated discount notes are subject to mandatory redemption upon a change of
control at the option of the holder thereof and are subject to redemption at
Holdings' option at any time.

     Holdings has no source of liquidity other than dividends from Charles
River. Charles River's ability to pay dividends will be subject to limitations
contained in the indenture and the new credit facility.

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   Historical

     Nine Months Ended September 25, 1999 Compared to Nine Months Ended
September 26, 1998

     Cash flow from operating activities for the nine months ended September 25,
1999 was $19.6 million compared to $23.5 million for the nine months ended
September 26, 1998 due to an increase in working capital.

     Net cash used in investing activities, consisting primarily of capital
expenditures and acquisitions, was $4.8 million for the nine months ended
September 25, 1999 compared to $14.3 million for the nine months ended September
26, 1998. The investing levels primarily change from year to year as the result
of spending on acquisitions. The large amount in 1998 primarily relates to the
acquisition of Tektagen, Inc. Capital expenditures were $7.4 million for the
nine months ended September 25, 1999, compared to $5.8 million for the nine
months ended September 26, 1998. There were not any significant capital
commitments at September 25, 1999. We continually monitor our capital spending
in relation to current and anticipated business needs. Our operations typically
do not require large capital expenditures and we anticipate that capital
spending will remain relatively consistent except for requirements related to
acquisitions.

     Net cash used in financing activities, consisting principally of net
activity with B&L, was $34.6 million for the nine months ended September 25,
1999 compared to $2.4 million for the nine months ended September 26, 1998. This
large increase relates principally to B&L dividending all excess cash in Charles
River Laboratories in connection with the Transactions.

     Fiscal 1998 Compared to Fiscal 1997

     Cash flow from operating activities in 1998 was $36.7 million compared to
$23.7 million in 1997, due to an increase in net income and a decrease in
working capital.

     Net cash used in investing activities in 1998 was $22.3 million compared to
$12.3 million in 1997. The increase in 1998 was primarily due to the acquisition
of Tektagen, Inc. Capital expenditures were $11.9 million in 1998, the same as
1997. Cash paid for acquisitions was $11.1 million in 1998, compared to $1.2
million in 1997.

     Net cash used in financing activities was $8.0 million in 1998 compared to
$12.9 million in 1997.  The decrease is due to less remittances to B&L.

     Fiscal 1997 Compared to Fiscal 1996

     Cash flow from operating activities in 1997 was $23.7 million compared to
$20.5 million in 1996, due to a decrease in working capital.

     Net cash used in investing activities in 1997 was $12.3 million compared to
$11.7 million in 1996. Capital expenditures were $11.9 million in 1997, compared
to $11.6 million in 1996.

     Net cash used in financing activities was $12.9 million in 1997 compared to
$4.1 million in 1996. The increase is due to increased remittances to B&L.

     We anticipate that our operating cash flow, together with borrowings under
the new credit facility, will be sufficient to meet our anticipated future
operating expenses, capital expenditures and debt service obligations as they
become due. However, our ability to make scheduled payments of principal of, to
pay interest on or to refinance our indebtedness and to satisfy our other debt
obligations will depend upon our future operating performance, which will be
affected by general economic, financial, competitive, legislative, regulatory,
business and other factors beyond our control. See "Risk Factors."

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Year 2000 Compliance

     We have been addressing the potential risks associated with the year 2000
date issue. We are following a formal program developed by B&L to assess and
renovate internal information technology ("IT") and non-information technology
("non-IT") operations that are at risk, and further, to evaluate the year 2000
readiness of key third-party suppliers and recipients of products, services,
materials or data. Year 2000 issues are being addressed through a combination of
software replacement, system upgrades and, in limited instances, source code
modifications (collectively, "renovation"). Ongoing reengineering projects have
had the incidental benefit of remediating several major year 2000 issues.

     The assessment phase of IT systems is substantially complete. The
renovation phase is on schedule and all key IT systems are compliant as of
November 1999. We expect other IT systems to be tested and compliant by
mid-December 1999. For non-IT systems, we have utilized a leading production
systems integration firm specializing in year 2000 assessment and remediation of
manufacturing, laboratory and research and development facilities. The
assessment phase was fully completed during the second quarter of 1999. At this
time, all key non-IT systems have been tested and are compliant. We assessed the
readiness of key suppliers and customers in early 1999. We have interacted with
each major supplier or recipient of data, including face-to-face interviews with
many of those considered to be critical to our company. This assessment is
complete.

     Our anticipated costs, comprised of both period expenses and capital
expenditures, of identifying and remediating year 2000 issues on the
above-described areas, are not expected to exceed $1.5 million. The majority of
this work has been done by in-house personnel, which commenced in 1995.
Management believes that our year 2000 program will substantially reduce the
risk of a material adverse impact on future financial results caused by the year
2000 issue. Potential risks of a failure to address a year 2000 issue (whether
IT, non-IT, or external) that could have a materially detrimental impact to us
include the inability to manufacture or ship products, the inability to receive
and fill orders, and problems with customers or suppliers, including the loss of
electrical power or the failure of a key customer or supplier to purchase
products or provide anticipated goods and services. At this stage, we have
contingency plans for all our major facilities globally.

     On September 29, 1999, we acquired Sierra. We are currently working with
local management to implement the year 2000 compliance program of Charles River.
We expect to complete all phases by the end of the fourth quarter of 1999.

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                                    BUSINESS

                                  CHARLES RIVER

     Overview

     We are a global market leader in the commercial production and supply of
animal research models for use in the discovery, development and testing of new
pharmaceuticals. We have expanded our core capabilities in research models to
become a leading supplier of related biomedical products and services in several
specialized niche markets. Our research model capabilities and biomedical
products and services, together with our global distribution network, allow us
to meet the extensive needs of our broad customer base. Our customers consist
primarily of:

   o large pharmaceutical companies, including the ten largest global
     pharmaceutical companies based on 1998 revenues

   o biotechnology, animal health, medical device and diagnostics companies

   o hospitals

   o academic institutions

   o government agencies

     Our facilities are located in 18 countries, including the United States,
Canada, Japan and many European countries. On a pro forma basis, research models
accounted for 62%, and biomedical products and services accounted for 38%, of
net sales for the twelve-month period ended September 25, 1999. Over the same
time period, we reported pro forma net sales of $230.5 million and pro forma
Adjusted EBITDA of $57.0 million. Adjusted EBITDA represents EBITDA, as defined,
adjusted for non-recurring, non-cash and cash items, as appropriate, which are
more fully described on page 12. EBITDA, as defined, represents operating income
plus depreciation and amortization. Adjusted EBITDA is presented because we
believe it is a meaningful indicator of Charles River's operating performance,
and it is the measure by which certain of the covenants under the new credit
facility are computed. EBITDA, as defined, and Adjusted EBITDA are not intended
to represent cash flows for the period, nor are they presented as an alternative
to operating income or as an indicator of operating performance. They should not
be considered in isolation or as a substitute for measures of performance
prepared in accordance with GAAP in the United States and are not indicative of
operating income or cash flow from operations as determined under GAAP. Our
method of computation may not be comparable to other similarly titled measures
of other companies.

     Research Models. We have a leading position in the global market for
research models, which primarily consists of purpose-bred rats and mice. The use
of research models is often a critical part of scientific discovery in the life
sciences and is required by FDA guidelines as well as foreign regulatory
agencies for new drug approval processes. Our business is primarily involved in
the early stages of drug discovery and development, commonly referred to as the
pre-clinical stage of drug development. During this stage, promising new drug
candidates are evaluated for their efficacy and safety through testing in
research models. Data from the pre-clinical stage is submitted to the applicable
regulatory agency for review in order for the drug to obtain approval to advance
to the human testing stage, commonly known as clinical studies. We principally
produce and sell rats, mice, other rodents and primates with highly defined
health and genetic backgrounds, primarily for use in pre-clinical research. Our
research models include special disease rodent models, such as mice with
impaired immune systems, which are increasingly demanded by biomedical
researchers for specialized research and discovery. We focus on maintaining
reliable biosecurity, which includes stringent guidelines to ensure
contamination-free research models. As a result, we provide consistent product
availability and offer a wide variety of healthy, genetically defined and
specifically targeted research models. We further differentiate our research
models by providing extensive technical service and support, including
scientific oversight from a team of more than 70 full-time, dedicated
professionals (DVMs, MDs and PhDs) specializing in laboratory animal medicine,
pathology and virology as well as molecular biology, primatology and genetics.

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     Biomedical Products and Services. Our biomedical products and services are
principally focused on meeting the research needs of large pharmaceutical
companies as well as biotechnology, animal health, medical device and
diagnostics companies. We are a leading supplier of endotoxin testing kits that
detect fever producing toxins in injectable drugs and devices and are one of
only two FDA validated in vitro alternatives to an animal test. In addition, we
are one of the world's largest producers of SPF fertile chicken eggs, which are
principally used to produce poultry vaccines. Our other biomedical products and
services, many of which are related to technologies developed in our research
model business, include:

   o transgenic animal production

   o medical device testing

   o contract research services

   o comprehensive health monitoring programs, including DNA testing, of animal
     colonies

   o testing services for human protein drug candidates

   o facility management services

Competitive Strengths

     Long-Standing Relationships with an Extensive Customer Base. Our customers
consist primarily of large pharmaceutical companies, including the ten largest
global pharmaceutical companies based on 1998 revenues, as well as
biotechnology, animal health, medical device and diagnostics companies and
hospitals, academic institutions and government agencies. We have many
long-term, stable relationships with our customers as evidenced by the fact that
all of our top 20 customers in 1989 remain our customers today. We have further
strengthened our customer relationships by offering related biomedical products
and services to our research model customers. Our customer base is also
diversified with no individual customer accounting for more than 3% of net sales
in 1998 and the top 30 customers representing approximately 30% of total net
sales.

     Critical Component of Pharmaceutical Research. The research models we
supply are essential to the new drug discovery and development process. FDA
guidelines and certain foreign regulatory agencies for many years have required
that new drug candidates be tested on two separate animal species in the
pre-clinical stage. According to the Pharmaceutical Research and Manufacturers
of America, total research and development spending in the United States by
research-based pharmaceutical companies was $17 billion in 1998. While
pharmaceutical companies generally invest large sums of money in developing new
drugs, the purchase of research models typically represents an immaterial
portion of the cost to commercialize a new drug. As a result, most customers are
principally focused on the quality of the research model which is critical for
achieving accurate and reproducible study results and facilitating timely FDA
approval of new drug candidates. For these reasons, our reputation for high
quality models and consistent product availability enable us to maintain and
expand our customer relationships.

     Leading Market Position. We believe that our worldwide infrastructure,
global staff of nearly 100 scientific professionals, 50 years of operating
history and reputation for high quality products have established us as a global
market leader in the commercial production and supply of research models. We
maintain our leadership position through our well-established customer
relationships, extensive high quality product offerings and our ability to
provide complementary services. Our market leadership in research models has
allowed us to capitalize on the significant research and development spending by
large pharmaceutical companies, and more recently on outsourcing trends by our
customers.

     Global Presence. We are a global provider of research models, with 49
facilities in the United States, Canada, Japan and many European countries. On a
pro forma basis, our international business contributed approximately 36% of our
net sales for the twelve-month period ended September 25, 1999. We believe that
as our customers continue to

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expand globally, they are likely to prefer to deal with a select number of
suppliers who have the ability to offer them a wide range of products and
services worldwide and in a timely manner. In addition, our customers benefit
from our global presence because it reduces potential exposure to biosecurity
risks and, minimizes regulatory restrictions and costs relating to transporting
research models over long distances. We provide our customers with uniform and
consistent research models regardless of the location of their research study.

     Experienced and Motivated Management Team. Our senior management team has
extensive experience in supplying the biomedical research industry, and an
average of 17 years of experience with Charles River. Our senior management
team, led by our chief executive officer, James C. Foster, has successfully
grown our business, secured our current strong market positions, integrated
eight strategic acquisitions since 1992 and positioned us for growth. Our senior
management team has broadened our pure research model focus to also include
being a leading supplier of biomedical products and services in several
specialized niche markets. As a result of the recapitalization of our business,
our management team indirectly holds 6.1% of the equity of Charles River, and
expects to have the option to acquire additional equity of Charles River through
a customary equity incentive plan.

Business Strategy

     Increase Sales in Research Models. We believe we can continue to increase
our market share in this segment by introducing new research models, providing
exceptional technical service and support, optimizing our existing price
structure and product mix and maintaining reliable biosecurity. In general, we
have been able to increase our prices at rates that are above the rate of
inflation in the United States by maintaining high quality and specialized
products, enhancing service and improving availability. We also have been
focused on periodically adding higher value research models to our portfolio.
These higher value research models tend to be premium priced, targeted towards
specific disease conditions and provide us with an enhanced product mix that
contributes to moderate but sustained growth in the research model business. We
expect to continue to expand this segment, both through sustained growth in
demand for already introduced models and the introduction of new models.

     Expand Value-Added Biomedical Products and Services. Our biomedical
products and services segment has been our fastest growing segment over the past
several years. We believe we can continue to grow this business by capitalizing
on outsourcing trends, building upon our existing capabilities and increasing
our global sales.

          Capitalize on Outsourcing Trends. Most of our biomedical products and
     services have been developed in response to the increasing outsourcing
     trends within the pharmaceutical industry. We believe this shift toward
     increased outsourcing began in response to the pharmaceutical companies'
     growing capabilities in identifying potential new drug compounds and the
     resulting resource constraints placed on pharmaceutical research
     infrastructures by non-core activities. By outsourcing their non-core
     activities to us, our customers can focus on proprietary drug development
     and streamline their drug development process. In response, we have
     expanded our offerings to include many pre-clinical research activities
     undertaken by our customers.

          Build Upon Our Existing Capabilities. As a result of our strong
     position in research models, our global presence and our professional
     expertise, we have the unique capability to offer related biomedical
     products and services to many of our customers. We intend to build upon
     this expertise to capture more outsourcing business opportunities by using
     our existing infrastructure, reputation for quality and extensive customer
     contacts. We believe there are numerous other opportunities for increasing
     our share of high value pre-clinical research services and products.

          Increase Our Global Sales. Our current biomedical products and
     services customer base is primarily composed of our domestic research model
     customers. We intend to continue to cross-sell our biomedical products and
     services to our existing international research model customers as well as
     seek new international customers for this segment. We believe that we can
     rapidly increase our global presence in this area by leveraging our
     existing international customer relationships and infrastructure.

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     Undertake Strategic Acquisitions and Alliances. We have a history of
acquiring and successfully integrating small companies in both our research
model and our biomedical products and services businesses. We expect that
strategic acquisitions will continue to provide an additional source of
long-term growth. In addition, we believe that our association with GHCP, one of
our equity investors, will assist us in identifying attractive acquisition
candidates while expanding our existing business. GHCP, which is comprised of
several experienced healthcare executives, has a strategic partnership with
DLJMB to invest in healthcare related businesses. The founding partners of GHCP
who are represented on the Charles River board include Henry Wendt, former
Chairman of SmithKline Beecham Corporation, Robert Cawthorn, former Chairman and
CEO of Rhone-Poulenc Rorer Inc. and Douglas Rogers, founder of Kidder, Peabody's
Health Care Group.

Business Segments

     Our business is divided into two segments, research models and related
biomedical products and services.

Research Models

     The research model business is our core business and accounted for 70% of
our 1998 sales. The business is principally comprised of small animals (rats,
mice and other rodents), and primates.

     Small Animal Models

     Our largest product line is the small animal models group, which consists
primarily of the production and sale of large numbers of purpose-bred rats and
mice to researchers. We believe we are a commercial leader in this business,
supplying rodents for research since 1947. We began as a supplier of outbred
rats, with genetic characteristics representative of a random population, and
over the years added other small animal species and strains to our product mix.
We have also added inbred animals, which have essentially identical genes,
hybrid animals, which are the offspring of two different inbred parents,
spontaneous mutant animals, which contain a naturally occurring genetic mutation
(such as immune deficiency) and transgenic animals, which contain genetic
material transferred from another source. We believe we offer one of the largest
selections of small animal models and provide our customers with high volume and
high quality production. Our rats, mice and other rodent species (e.g., guinea
pigs, hamsters) have been and continue to be some of the most extensively used
research models in the world, largely as a result of our continuous commitment
to innovation and quality in the breeding process. We provide our small animal
models to numerous customers around the world, including pharmaceutical and
biotechnology companies and hospitals and universities.

     The most common use of our small animal models is for the screening,
discovery and testing of new drug candidates. For example, in order for a
pharmaceutical company to file a complete submission for FDA approval of a new
drug, it must provide evidence of safe and effective testing on two species of
animal models, one small and one large, before moving into the clinic for
testing on humans. Animal testing is used in order to identify, define,
characterize and assess the safety of new drug candidates. Outbred, and
increasingly, inbred mice are often the model of choice in early discovery and
development work, while outbred rats are frequently used in safety assessment
studies. Our models are also used in basic life science research within
universities, hospitals and other research institutions. Unlike drug discovery,
these uses are generally not specifically mandated by regulatory agencies such
as the FDA, but instead are governed by the terms of government grants,
institutional protocols as well as the scientific inquiry and peer review
publication processes.

     Primates

     We provide primates to the research community, principally for use in drug
development and testing studies. Primates are often used as the required large
animal species in FDA or similar regulated testing protocols. We believe that
the use of primates has been moderately increasing recently, as they are often
the preferred model for testing the growing number of new drug candidates
derived from human proteins, such as drugs developed in AIDS research.

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     Our largest primate business is located in Houston, where we import,
quarantine, condition, hold and sell primates exported to us by our supplier in
Mauritius. We believe that these primates are unique, in that they are naturally
free of herpes B virus, a common virus present in the species which is
transmissible to humans in a highly toxic form. We have a long-term supply
contract under which our supplier provides us with a reliable stream of
purpose-bred and feral animals. The contract expires in December 31, 2005 but is
automatically renewed for an additional five-year period unless it is breached.
We also have a primate import and quarantine facility in the United Kingdom.

Biomedical Products and Services

     Biomedical products and services include our newer, higher growth
businesses, such as: SPF eggs; endotoxin testing; special animal services;
diagnostics; biosafety testing; facility management; and medical device testing.

     SPF Eggs

     Fertile SPF chicken embryos within eggs are often used by animal health
companies as a living "bioreactor," or self-contained manufacturing vehicle, to
grow large quantities of live or killed avian viruses. These viruses are then
used as the raw material in poultry vaccines. We are a leading supplier to the
major global manufacturers of poultry vaccines, researchers and other users. We
also provide specially raised SPF eggs for some human vaccines. We have entered
into an agreement with a company that is in the FDA approval process for a nasal
spray flu vaccine for human use that, if commercially successful, may
significantly increase our existing SPF eggs business.

     We have a worldwide presence that includes several SPF eggs production
facilities in the United States, as well as facilities in Germany and in
Australia. We have a joint venture in Mexico and a franchise in India. We also
operate a specialized avian laboratory in Storrs, Connecticut which provides
support services to our customers.

     Endotoxin Testing

     We are a market leader in the endotoxin testing business, which is used to
test quality control samples of injectable drugs and devices, their components
and the processes under which they are manufactured, for the presence of
endotoxin. Endotoxins are fever producing pathogens or toxic compounds that are
highly toxic to humans when sufficient quantities are introduced into the body.
Quality control testing for endotoxin contamination by our customers is a
mandatory FDA requirement for injectable drugs and devices, and the manufacture
of the test kits and reagents is regulated by the FDA as a medical device.
Endotoxin testing uses a processed extract from the blood of the horseshoe crab,
known as limulus amebocyte lysate, or "LAL." The LAL test is the first and one
of the only FDA validated in vitro alternatives to an animal model test,
specifically the rabbit pyrogen test. The process of extracting blood is not
harmful to the crabs, which are subsequently returned to their natural ocean
environment. We produce and distribute test kits and reagents to pharmaceutical
and biotechnology medical device and product companies on a global basis.

     Special Animal Services

     Special Animal Services, or SAS, provides services for our customers to
help them maintain, improve, breed and test animals purchased or created by them
for biomedical research activities. Our special animal services business
includes: transgenic breeding, model characterization and scale-up, genetic
testing and characterization, quarantine, embryo cryopreservation, embryo
transfer, rederivation, and health and genetic monitoring. We provide these
services to more than 100 customers around the world, from pharmaceutical and
biotechnology companies to hospitals and universities, and maintain more than
150 different lines of research models. Our Contract Research Services business
is a discrete unit within the SAS business that provides more advanced or
specialized research model studies. These projects not only capitalize on our
strong historical research model capabilities, but also exploit more recently
developed capabilities in protocol development, animal micro-surgery, dosing
techniques, drug efficacy testing and data management and analysis. We initiated
SAS five years ago in response to our customers' outsourcing needs. The business
is managed and staffed by a senior team that was trained and developed
internally. This business leverages the technologies and relationships
associated with our research model business.

                                       47


<PAGE>



     Diagnostics

     Diagnostics is an internally developed business that was built upon the
scientific foundation created by the diagnostic laboratory needs of our research
model business. We now provide commercial laboratory services to monitor and
analyze the health and genetics of our customers' research models used in their
research protocols. We may serve as the customer's sole source testing
laboratory, or as a back-up source supporting some internal capability. Our
diagnostics business is principally located in Wilmington, Massachusetts and
Troy, New York.

     Biosafety Testing

     We recently entered the evolving business generally known as "biosafety
testing." This is a specialized area of non-clinical quality control testing
that is frequently outsourced by both pharmaceutical and biotechnology
companies. The testing services we provide allow the customer to determine if
the human protein drug candidates, or the process for manufacturing those
products, are essentially "pure," or free of residual biological materials. The
bulk of this testing work is required by the FDA, either for obtaining new drug
approval or maintaining a licensed manufacturing capability. Our scientific
staff consults with customers in the areas of process development, validation,
manufacturing scale-up, and biological tests. Our biosafety business is located
in Malvern, Pennsylvania.

     Facility Management

     Facility management involves managing the animal care function and
facilities on behalf of government, academic, pharmaceutical and biotechnology
companies. This business builds upon our core capabilities as a leading provider
of high quality research models. We now manage all or a part of the animal care
facilities of several commercial, government and academic institutions in both
the United States and Europe.

     Medical Device Testing

     We have capabilities in medical device testing that are complementary to
our research model business, especially in the large and growing cardiovascular
field, using large research models. This business also provides services in
support of animal and human health research, most notably in the area of new
drug and vaccine development and experimental xenotransplantation of whole
organs and tissues from swine to humans. Our medical device testing business is
located in Southbridge, Massachusetts.

     Sierra

     Sierra, which we recently acquired, is a pre-clinical biomedical services
company with expertise in drug safety and efficacy assessment studies using
research models. Sierra offers its services to biotechnology, pharmaceutical and
medical device companies that are principally focused on conducting studies
needed in the early stages of drug development, especially those that require
highly specialized scientific capabilities. Sierra has expertise in conducting
critical developmental studies on potential new drugs and devices using research
models, including short-term evaluations of potential new treatment for human or
animal disease conditions.

Customers

     Our customers consist primarily of large pharmaceutical companies,
including the ten largest pharmaceutical companies based on 1998 revenues, as
well as biotechnology, animal health, medical device and diagnostic companies
and hospitals, academic institutions and government agencies. We have many
long-term, stable relationships with our customers as evidenced by the fact that
all of our top 20 customers in 1989 remain our customers today.

     During 1998, in both the research models and biomedical products and
services businesses, approximately two-thirds of our sales were to
pharmaceutical and biotechnology companies, and the balance to hospitals,
universities and the government.

                                       48


<PAGE>



Sales, Marketing and Customer Support

     We sell our products and services principally through a direct sales force.
As of September 25, 1999, we have approximately 51 employees engaged in field
sales, of which 30 are in the United States, 12 are in Europe and 9 are with our
joint venture company in Japan. The direct sales force is supplemented by a
network of international distributors for certain of our biomedical product and
services businesses.

     Our internal marketing groups support the field sales staff, while
developing and implementing programs to create close working relationships with
customers in the biomedical research industry. Our web site, www.criver.com, is
an effective marketing tool, and has become recognized as a valuable resource in
the laboratory animal field by a broad spectrum of industry leaders. Our website
is not incorporated by reference in this prospectus.

     We maintain both a customer service and technical assistance department,
which services our customers' routine and more specialized needs. We frequently
assist our customers in solving problems related to animal husbandry, health and
genetics, biosecurity, protocol development and other areas in which our
internal expertise is recognized as a valuable customer resource.

Research and Development

     We do not maintain a fully dedicated research and development staff.
Rather, this work is done on an individual project basis or through a university
or other forms of collaborations. Our annual dedicated research and development
spending was $1.5 million in 1996, $1.4 million in 1997, $1.4 million in 1998
and $0.4 million for the nine months ended September 25, 1999. Our approach to
developing new products or services is to extend our base technologies into new
applications and fields, and to license or acquire technologies to serve as a
platform for the development of new businesses that service our existing
customer base. Our research and development focus is principally on developing
projects that improve our productivity or processes.

Industry Support and Animal Welfare

     Among the shared values of our employees is a concern for and commitment to
animal welfare. We have been in the forefront of animal welfare improvements in
our industry, and continue to demonstrate our commitment with special
recognition programs for employees who demonstrate an extraordinary commitment
in this critical area of our business.

     We support a wide variety of organizations and individuals working to
further animal welfare as well as the interests of the biomedical research
community. We fund internships in laboratory animal medicine, provide financial
support to non-profit institutions that educate the public about the benefits of
animal research, and provide awards and prizes to outstanding leaders in the
laboratory animal medicine field. Our primate import business dedicates a
portion of its net sales, through a royalty, to support similar programs and
initiatives.

Employees

     As of September 25, 1999, we have approximately 2,430 employees, including
nearly 100 professionals with advanced degrees (DVMs, PhDs and MDs). Our
employees are not unionized in the United States, though we are unionized in
certain European locales, consistent with local custom for our industry. We
believe that we have a good relationship with our employees.

Competition

     Our strategy is to be the leader in each of the markets in which we
participate. Our competitors are generally different in each of our business
areas.

     In our research models business segment, we have three smaller competitors
in the United States, several smaller ones in Europe, and two in Japan. Of our
main United States competitors, two are privately held businesses and the third

                                       49


<PAGE>



is a government financed non-profit institution. We believe that none of our
competitors for research models has our comparable global reach, financial
strength, breadth of product offering or pharmaceutical industry relationships.

     We have several competitors in our biomedical products and services
business segment. A few of our competitors in our biomedical products and
services business are larger than we are; however, many are smaller and more
regionalized. Expansion by our competitors in other areas in which we operate
could affect our competitive position. Of all of our businesses, we have the
smallest relative share in the biosafety testing market, where the market leader
is a well established company.

     We generally compete on the basis of quality, reputation, and availability,
which is supported by our international presence with strategically located
facilities.

Environmental Matters; Legal Proceedings

     Our operations and properties are subject to extensive foreign and federal,
state and local environmental protection and health and safety laws and
regulations. These laws and regulations govern, among other things, the
generation, storage, handling, use and transportation of hazardous materials and
the handling and disposal of hazardous and biohazardous waste generated at our
facilities. Under such laws and regulations, we are required to obtain permits
from governmental authorities for certain operations. If we violate or fail to
comply with these laws, regulations or permits, we could be fined or otherwise
sanctioned by regulators. Under certain environmental laws and regulations, we
could also be held responsible for all of the costs relating to any
contamination at our past or present facilities and at third party waste
disposal sites.

     Although we believe that our costs of complying with current and future
environmental laws, and our liabilities arising from past or future releases of,
or exposure to, hazardous substances will not materially adversely affect our
business, results of operations or financial condition, we cannot assure you
that they will not do so.

     We have for many years been engaged in disputes with federal, state and
local authorities and private environmental groups regarding damage to mangrove
plants resulting from our maintaining a free range primate breeding operation on
two islands we purchased in the Florida Keys. To settle our disputes, we have
agreed to move the primates off the islands, and thereafter transfer the real
property to the government. We have also agreed to refoliate the islands at our
cost, restoring them to their conditions prior to our arrival. Despite our best
efforts, we have not been able to successfully replant the lost mangroves,
principally due to the presence of a free range animal population and storms. We
believe that we will finally resolve these disputes by successfully refoliating
the islands over the next three years.

     We are not a party to any other material legal proceedings, other than
ordinary routine litigation incidental to our business which is not otherwise
material to our business or financial condition.

Regulatory Matters

     Certain of our business activities are currently regulated by the AWA,
which governs the treatment of certain animals intended for use in research.
Much of our United States small animal research model business, which is
predominantly rats and mice, is not subject to regulation under the AWA although
we comply with licensing and registration requirement standards set by the USDA
for handling animals, including breeding, maintenance and transportation of our
animals. Birds, including the chickens used in our United States SPF egg
business, are also not subject to AWA regulations. However, the USDA, which
enforces the AWA, is presently considering changing the regulations issued
pursuant to the AWA, in light of judicial action, to include rats, mice and
birds within its coverage. The AWA imposes a wide variety of specific
regulations on producers and users of animal subjects, most notably cage size,
shipping conditions and environmental enrichment methods. Our animal production
facilities in the United States are accredited by a highly regarded member
association known as AAALAC, which maintains standards that often exceed those
of the USDA.

                                       50


<PAGE>



     Our biomedical products and services businesses are also generally
regulated by the USDA, and in the case of our endotoxin testing business, the
FDA. Our manufacture of test kits and reagents for endotoxin testing is subject
to regulation by the FDA, under the authority of the Federal Food, Drug, and
Cosmetic Act. We are required to register with the FDA as a device manufacturer
and are subject to inspection on a routine basis for compliance with the FDA's
Quality System Regulations. These regulations require that we manufacture our
products and maintain our documents in a prescribed manner with respect to
manufacturing, testing and control activities. We are in receipt of a "warning
letter" from the FDA for quality control deficiencies with regard to our
Charleston, South Carolina facility, and are attempting to address the agency's
concerns. See "Risk Factors--We must comply with many federal, state and local
rules and regulations."

Properties

     The following charts provide summary information on our properties. The
first chart lists the sites we own, and the second chart the sites we lease.
Most of our material leases expire from 2000 to 2005.

                                  Sites--Owned

<TABLE>

                                      No. of
Country                               Sites           Total Square Feet          Principal Functions
- ------------------------------------- -------        -------------------   -------------------------------
<S>                                       <C>              <C>              <C>
Canada...............................       1                48,789         Office, Production, Laboratory
France...............................       3               373,214         Office, Production, Laboratory
Germany..............................       3               122,314         Office, Production, Laboratory
Italy................................       1                36,677         Office, Production, Laboratory
Japan................................       3               114,831         Office, Production, Laboratory
Netherlands..........................       1                 6,502               Office, Production
United Kingdom.......................       2                67,331         Office, Production, Laboratory
USA..................................      19               732,980         Office, Production, Laboratory
                                        -----             ---------
Total................................      33             1,502,638
                                        =====             =========
</TABLE>

                                                     Sites--Leased

<TABLE>

                                      No. of
Country                               Sites           Total Square Feet          Principal Functions
- ------------------------------------- -------        -------------------   -------------------------------
<S>                                       <C>                   <C>                      <C>
Australia............................       1                16,787               Office, Production
Belgium..............................       1                16,140               Office, Production
Czech Republic.......................       1                23,704         Office, Production, Laboratory
Hungary..............................       1                 4,681         Office, Production, Laboratory
Spain................................       1                 3,228             Production, Laboratory
Sweden...............................       1                 8,070                   Production
USA(1)...............................      10               255,895         Office, Production, Laboratory
                                        -----               -------
Total................................      16               328,505
                                        =====               =======
</TABLE>

- -------------------


                                       51


<PAGE>



(1)  Includes two properties leased by Sierra with a total square footage of
     116,751 square feet.



                                       52


<PAGE>



                                   MANAGEMENT

          The following table sets forth the name, age and position of each
person who is an executive officer, significant member of our management, or
director of our company as of the Recapitalization. Each director also serves as
a director of Holdings.

<TABLE>

Name                                                  Age        Position
- -----                                                 -----      -----
<S>                                                   <C>        <C>

James C. Foster....................................   48         President, Chief Executive Officer and Director
Real H. Renaud.....................................   52         Senior Vice President and General Manager,
                                                                 European and North American Animal Operations
Thomas F. Ackerman.................................   45         Vice President and Chief Financial Officer
David P. Johst.....................................   37         Vice President, Human Resources and
                                                                 Administration
Dr. Charn Sun Lee..................................   55         Vice President, Asian Operations
Julia D. Palm......................................   52         Vice President and General Manager, Biotech
                                                                 Products and Services
Dennis R. Shaughnessy .............................   41         Vice President, Corporate Development, General
                                                                 Counsel and Secretary
Dr. Jorg M. Geller.................................   43         Vice President, Charles River Europe;
                                                                 President, Charles River SPAFAS
Gilbert M. Slater..................................   61         Vice President, Sales & Marketing
Robert Cawthorn....................................   63         Director
Stephen D. Chubb...................................   55         Director
Thompson Dean......................................   41         Director
Stephen C. McCluski................................   47         Director
Reid S. Perper.....................................   40         Director
Douglas E. Rogers..................................   44         Director
William Waltrip....................................   62         Director
Henry C. Wendt.....................................   66         Director
</TABLE>

     James C. Foster joined Charles River in 1976 as General Counsel. Over the
past 23 years, Mr. Foster has held various staff and managerial positions with
Charles River, culminating in Mr. Foster being named Charles River's President
and Chief Operating Officer in 1991. He has served as our President and Chief
Executive Officer since 1992. Mr. Foster also serves on the Board of Directors
of BioTransplant, Inc.

     Real H. Renaud joined Charles River in 1964 and has 35 years of small
animal production and related management experience. In 1986, Mr. Renaud became
Charles River's Vice President of Production, with responsibility for overseeing
our North American small animal operations, and was named Vice President,
Worldwide Production in 1990. Mr. Renaud assumed his current position in 1996,
following a two-year European assignment during which he provided direct
oversight to Charles River's European operations.

     Thomas F. Ackerman joined Charles River in 1988 with over eleven years of
combined public accounting and international finance experience. He was named
Controller, North America in 1992 and became our Vice President and Chief
Financial Officer in 1996. He is currently responsible for overseeing Charles
River's Accounting and Finance Department, as well as our Information Management
& Technology Group. Prior to joining Charles River, Mr. Ackerman was an
accountant at Arthur Anderson & Co.

                                       53


<PAGE>



     David P. Johst joined Charles River in 1991 as Corporate Counsel and was
named Vice President, Human Resources in 1995. He assumed his current position
in 1996, and is responsible for overseeing Charles River's Human Resources
Department, as well as several other corporate staff departments. He also serves
as our attorney on labor relations matters. Prior to joining Charles River, Mr.
Johst was a corporate associate at Boston's Hale and Dorr.

     Dr. Charn Sun Lee joined Charles River in 1975 as a Staff Veterinarian and
has 24 years of experience in laboratory animal medicine. In 1995, Dr. Lee was
named Vice President, Asian Operations and serves as our primary corporate
liaison in dealings with Charles River Japan, providing both business and
technical support.

     Julia D. Palm joined Charles River in 1995 with nearly 20 years of
management and marketing experience in the medical device and biotechnology
industries. Prior to joining Charles River, she held various positions with
Becton Dickinson, National Medical Care and W. R. Grace, and served as President
of W.R. Grace's Amicon Division immediately prior to joining us. Ms. Palm has
responsibility for overseeing our portfolio of biotechnology companies on a
worldwide basis.

     Dennis R. Shaughnessy joined Charles River in 1988 as Corporate Counsel and
was named Vice President, Business Affairs in 1991. Prior to joining Charles
River, Mr. Shaughnessy was a corporate associate at Boston's Testa, Hurwitz &
Thibeault and previously served in government policy positions. He assumed his
current position in 1994 and is responsible for overseeing our business
development initiatives on a worldwide basis, as well as handling our overall
legal affairs. Mr. Shaughnessy also serves as our Corporate Secretary.

     Dr. Jorg M. Geller joined Charles River in 1986 as Production Manager for
German operations. In 1994, Dr. Geller was named Vice President, Charles River
Europe, with responsibility for overseeing operations in Germany and Eastern
Europe, as well as implementing Charles River's strategic growth and
diversification initiatives in the European market. In 1997, Dr. Geller became
President of Charles River's SPAFAS subsidiary where he oversees the worldwide
operations of SPAFAS in addition to his current European responsibilities.

     Gilbert M. Slater joined Charles River in 1960, in connection with our
acquisition of a privately held laboratory animal supplier which included Mr.
Slater as one of its principals. Mr. Slater assumed his position as Vice
President of Sales & Marketing in January of 1998. Mr. Slater has extensive
knowledge of the U.S. market for laboratory research animals based on more than
40 years of direct sales and customer relations experience. Mr. Slater also
oversees Charles River's industry relation initiatives and serves as our key
point of contact in dealings with major laboratory animal customers.

     Robert Cawthorn has been a Managing Director of Global Health Care
Partners, a group of DLJ Merchant Banking, Inc. since 1997. Previously, Mr.
Cawthorn was Chief Executive Officer and Chairman of Rhone-Poulenc Rorer Inc.
and an Executive Officer of Pfizer International and the first President of
Biogen Inc. Mr. Cawthorn serves as a director of CBS Corporation and Sunoco,
Inc.

     Stephen D. Chubb has been Chairman, Director and Chief Executive Officer of
Matritech, Inc. since its inception in 1987. Previously, Mr. Chubb served as
President and Chief Executive Officer of T Cell Sciences, Inc. and as President
and Chief Executive Officer of Cytogen Company.

     Thompson Dean has been a Managing Partner of DLJ Merchant Banking, Inc.
since November 1996. Previously, Mr. Dean was a Managing Director of DLJ
Merchant Banking, Inc. and its predecessor since January 1992. Mr. Dean serves
as a director of Commvault Inc., Von Hoffmann Press, Inc., Manufacturer's
Services Limited, Phase Metrics, Inc., AKI Holdings Corp., Amatek Ltd., DeCrane
Aircraft Holdings Inc., Insilco Holding Corporation, Formica Corporation and
Mueller Group, Inc.

     Stephen C. McCluski has been Senior Vice President and Chief Financial
Officer of Bausch & Lomb Incorporated since 1995. Previously, Mr. McCluski
served as Vice President and Controller of Bausch & Lomb Incorporated and
President of Outlook Eyewear Company.

                                       54


<PAGE>



     Reid S. Perper has been a Principal of DLJ Merchant Banking, Inc. since
January 1996. Prior to that time, Mr. Perper had been a Vice President of DLJ
Merchant Banking, Inc. since January 1993. Mr. Perper was formerly a director of
IVAC Holdings, Inc. and Fiberite Holdings, Inc.

     Douglas E. Rogers has been Managing Director of Global Health Care
Partners, a group of DLJ Merchant Banking, Inc. since 1996. Previously, Mr.
Rogers was Vice President at Kidder Peabody & Co., Senior Vice President at
Lehman Brothers, and head of U.S. Investment Banking at Baring Brothers. Mr.
Rogers serves as a director of Computerized Medical Systems, Inc. and Wilson
Greatbatch Ltd.

     William Waltrip has been director of Bausch & Lomb Incorporated since 1985,
and Chairman of the Board of Directors of Technology Solutions Company since
1993. He is also a director of Teachers Insurance and Annuity Association,
Thomas & Betts Corporation and Technology Solutions Company. Previously, Mr.
Waltrip served as Chairman and Chief Executive Officer of Bausch & Lomb
Incorporated, as Chief Executive Officer of Technology Solutions Company, as
Chairman and Chief Executive Officer of Biggers Brothers, Inc., and as Chief
Operating Officer of IU International Corporation. He was also previously
President and Chief Executive Officer and a director of Purolator Courier
Corporation.

     Henry C. Wendt has been the Chairman of Global Health Care Partners, a
group of DLJ Merchant Banking, Inc. since 1996. Previously, Mr. Wendt was
Chairman of SmithKline Beecham Corporation and President and Chief Executive
Officer of SmithKline Beckman Corp. prior to its merger with Beecham and served
as founder and First Chairman of Pharmaceutical Partners for Better Health Care.
Mr. Wendt serves as a director of Allergen, Inc., Atlantic Richfield Company,
Computerized Medical Systems, The Egypt Investment Company, West Marine Products
and Wilson Greatbatch Ltd.

                                       55


<PAGE>



                             EXECUTIVE COMPENSATION

     The aggregate remuneration of our chief executive officer during 1998 and
the four other most highly compensated executive officers whose salary and bonus
exceeded $100,000 for the fiscal year ended December 26, 1998, is set forth in
the following table:

                           Summary Compensation Table

<TABLE>

                                                                               Long Term
                                                                             Compensation
                                                                       ------------------------
                                                                       Restricted    Securities
                                                                          Stock      Underlying    All Other
Name and Principal Position                      Annual                 Awards(s)     Options     Compensation
- --------------------------------------    -------------------          ----------    ----------   ------------
                                          Salary        Bonus
                                           -----        -----
<S>                                       <C>           <C>              <C>           <C>           <C>
James C. Foster........................   $308,700      $230,705(1)      4,500        19,000      $204,985(2)
   Director, President and Chief
      Executive Officer
Real H. Renaud.........................    212,000      99,814            --           4,200        64,834(3)
   Senior Vice President and
      General Manager, European
      and North American Animal
      Operations
David P. Johst.........................    146,800      69,911            --           4,200        69,871(4)
   Vice President, Human
      Resources and Administration
Julia D. Palm..........................    165,200      50,829            --           1,720        66,953(5)
   Vice President and General
      Manager, Biotech Products
      and Services
Dennis R. Shaughnessey.................    167,800      79,898            --           4,200        82,056(6)
   Vice President, Corporate
      Development, General
      Counsel and Secretary
</TABLE>
- -------------------

(1)  Includes $12,000 in cash paid to Mr. Foster under Bausch & Lomb's Long Term
     Incentive Plan during 1998.

(2)  Includes employer contribution under our Executive Supplemental Life
     Insurance Retirement Plan and EVA Long-Term Incentive Plan ($168,068) and
     Employee Savings Plan ($3,200), costs associated with a corporate
     automobile ($23,861) and corporate club dues and services ($9,856).

(3)  Includes employer contribution under our Executive Supplemental Life
     Insurance Retirement Plan ($40,075) and Employee Savings Plan ($3,200) and
     costs associated with a corporate automobile ($21,559).

(4)  Includes employer contribution under our Executive Supplemental Life
     Insurance Retirement Plan ($54,982) and Employee Savings Plan ($3,200) and
     costs associated with a corporate automobile ($11,689).

(5)  Includes employer contribution under our Executive Supplemental Life
     Insurance Retirement Plan ($50,691) and Employee Savings Plan ($3,200) and
     costs associated with a corporate automobile ($13,062).

(6)  Includes employer contribution under our Executive Supplemental Life
     Insurance Retirement Plan ($57,956) and Employee Savings Plan ($2,132) and
     costs associated with a corporate automobile ($21,968).

                                       56


<PAGE>



          Stock Options

     The following table presents material information regarding options to
acquire shares of Bausch & Lomb's common stock granted to our named executive
officers in 1998.

                        Option Grants in 1998 Fiscal Year

<TABLE>

                                             Individual Grants                      Potential Realizable Value
                            ------------------------------------------------                at Assumed
                             Number of   Percent of Total                            Annual Rates of Stock Price
                            Securities       Options                                         Appreciation
                            Underlying     Granted to     Exercise or                     for Option Term(1)
                              Options     Employees in    Base Price  Expiration    ---------------------------------
Name                        Granted(#)   Fiscal Year(%)     ($/Sh)       Date        0%($)     5%($)        10%($)
- -----                       ----------   --------------   ----------  ----------    -----     -----         -----
<S>                              <C>        <C>           <C>           <C>        <C>        <C>           <C>
James C. Foster.............     19,000       1.36%        50.94       7/27/08       --      608,682      1,542,520
Real H. Renaud..............      4,200       0.30%        50.94       7/27/08       --      134,551        340,978
David P. Johst..............      4,200       0.30%        50.94       7/27/08       --      134,551        340,978
Julia D. Palm...............      1,720       0.12%        50.94       7/27/08       --       55,102        139,639
Dennis R. Shaughnessy.......      4,200       0.30%        50.94       7/27/08       --      134,551        340,978
</TABLE>

- -------------------

(1)  We cannot assure you that the value realized by an optionee will be at or
     near the amount estimated using this model. These amounts rely on assumed
     future stock price movements which management believes cannot be predicted
     with a reliable degree of accuracy. These amounts are based on the
     assumption that the option holders hold the options granted for their full
     term. The column headed "0% ($)" is included to illustrate that the options
     were granted at fair market value and option holders will not recognize any
     gain without an increase in the stock price, which increase benefits all
     shareholders commensurately.

     The following table provides material information related to the number and
value of options exercised during 1998 and the value of options held by the
named executive officers at the end of 1998. On December 26, 1998, the closing
sale price of Bausch & Lomb common stock on NYSE was $58 11/16 .

     Aggregated Option Exercises in 1998 Fiscal Year and Fiscal Year-End Option
Values

<TABLE>
                                                                       Number of Securities
                                                                     Underlying Unexercised    Value of Unexercised
                                                                            Options           In-the-Money Options at
                                           Shares                      at Fiscal Year-End (#)      Year End ($)(2)
                                        Acquired on  Value Realized  -----------------------  --------------------------
Name                                    Exercise (#)   ($)(1)        Exercisable Unexercisable Exercisable Unexercisable
- -----                                  ------------- --------------  ----------- ------------- ----------- -------------
<S>                                          <C>       <C>           <C>         <C>         <C>           <C>
James C. Foster.........................     362       10,238           73,740    37,760       1,244,664     497,373
Real H. Renaud..........................   5,036       82,873           17,696     9,418         257,909     125,719
David P. Johst..........................   3,144       64,194            7,370     8,407         105,561     111,026
Julia D. Palm...........................   1,880       39,600            3,214     4,267          60,463      64,727
Dennis R. Shaughnessy...................   6,890       54,303            1,650     8,350          15,469     109,697
</TABLE>

- -------------------


                                       57


<PAGE>



(1)  Value realized represents the difference between the exercise price of the
     option shares and the market price of the option shares on the date the
     option was exercised. The value realized was determined without
     consideration for any issues or brokerage expenses which may have been
     owed.

(2)  Represents the total gain which would be realized if all in-the-money
     options held at year end were exercised, determined by multiplying the
     number of shares underlying the options by the difference between the per
     share option exercise price and the per share fair market value on December
     26, 1998.

Employee Agreements and Compensation Arrangements

     We do not currently have employment agreements with any of our named
executive officers.

Director Compensation

     We intend to pay our independent directors $10,000 per year and $1,000 per
board meeting, plus travel expenses.

                                       58


<PAGE>



         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     All of our common stock is held by Holdings. The following table sets forth
certain information with respect to the beneficial ownership of Holdings common
stock by (a) any person or group who beneficially owns more than five percent of
Holdings common stock, (b) each of our directors and executive officers and (c)
all directors and officers as a group.

<TABLE>

                                                                             Percentage of
                                                                              Outstanding
Name of Beneficial Owner:                                                   Common Stock(1)
- ------------------------                                                    ---------------
<S>                                                                            <C>
DLJ Merchant Banking Partners II, L.P. and related investors(2)(3).........     71.9%
Bausch & Lomb Incorporated.................................................     12.5%
James C. Foster(4).........................................................      2.0%
Real H. Renaud(4)..........................................................        *
Thomas F. Ackerman(4)......................................................        *
David P. Johst(4)..........................................................        *
Dr. Charn Sun Lee(4).......................................................        *
Julia D. Palm(4)...........................................................        *
Dennis R. Shaughnessy(4)...................................................        *
Dr. Jorg M. Geller(4)......................................................        *
Gilbert M. Slater(4).......................................................        *
Robert Cawthorn(5).........................................................       --
Stephen D. Chubb...........................................................       --
Thompson Dean(5)...........................................................       --
Stephen C. McCluski........................................................       --
Reid S. Perper(5)..........................................................       --
Douglas E. Rogers(5).......................................................       --
William Waltrip............................................................       --
Henry C. Wendt(5)..........................................................       --
Officers and directors as a group(4).......................................      6.1%
</TABLE>

- -------------------
* less than 1%.

(1)  Under the SEC's rules, each person or entity is deemed to be a beneficial
     owner with the power to vote and direct the disposition of these shares.

(2)  Consists of shares held indirectly through CRL Acquisition LLC by the DLJMB
     Funds and the following related investors: DLJ Merchant Banking Partners
     II-A, L.P.; DLJ Investment Partners, L.P.; DLJ Offshore Partners II, C.V.;
     DLJ Capital Corp.; DLJ Diversified Partners, L.P.; DLJ Diversified
     Partners-A, L.P.; DLJ Millennium Partners, L.P.; DLJ Millennium Partners-A,
     L.P.; DLJMB Funding II, Inc.; DLJ First ESC L.P.; DLJ EAB Partners, L.P.;
     DLJ ESC II, L.P.; Sprout Capital VIII, L.P. and Sprout Venture Capital,
     L.P. See "Certain Relationships and Related Party Transactions" and "Plan
     of Distribution." The address of each of these investors is 277 Park
     Avenue, New York, New York 10172, except the address of Offshore Partners
     is John B. Gorsiraweg 14, Willemstad, Curacao, Netherlands Antilles.

(3)  Does not include the effect of warrants issued previously with the old
     notes or in connection with the issuance by Holdings of senior discount
     debentures with warrants to the DLJMB Funds and other investors. If such
     warrants were exercised, the percentage of outstanding common stock
     beneficially owned by DLJ Merchant Banking Partners II, L.P. and related
     investors would decrease by 1.0%.

(4)  Consists of shares held indirectly through CRL Acquisition LLC.

                                       59


<PAGE>



(5)  Messrs. Cawthorn, Dean, Perper, Rogers and Wendt are officers of DLJ
     Merchant Banking, Inc., an affiliate of the DLJMB Funds and the initial
     purchaser. Shares shown for Messrs. Cawthorn, Dean, Perper, Rogers and
     Wendt exclude shares shown as held by the DLJMB Funds, as to which they
     disclaim beneficial ownership. The address of each of these investors is
     277 Park Avenue, New York, New York 10172.

              CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS

The Recapitalization

     Financial Advisory Fees and Agreements

     Donaldson, Lufkin & Jenrette Securities Corporation ("DLJ Securities
Corporation"), an affiliate of the DLJMB Funds, acted as financial advisor to us
and was also the initial purchaser of the old notes. We paid customary fees to
DLJ Securities Corporation as compensation for its services as financial advisor
and initial purchaser. DLJ Capital Funding, an affiliate of the DLJMB Funds,
received customary fees and reimbursement of expenses in connection with the
arrangement and syndication of the new credit facility and as a lender
thereunder. The aggregate amount of all fees paid to the DLJ entities in
connection with the Recapitalization and the related financing was approximately
$13.2 million plus out-of-pocket-expenses.

     Pursuant to the investors' agreement described below, for a period of five
years from the date of the investors' agreement, DLJ Securities Corporation or
any of its affiliates will be engaged as the exclusive financial and investment
banking advisor of Holdings. We expect that DLJ Securities Corporation or such
affiliate will receive customary fees for such services rendered and will be
entitled to reimbursement for all reasonable disbursements and out-of-pocket
expenses incurred in connection with such engagement. We expect that any such
arrangement will include provisions for the indemnification of DLJ Securities
Corporation against certain liabilities, including liabilities under the federal
securities laws.

     CRL Acquisition LLC Operating Agreement

     CRL Acquisition LLC, DLJMB Funds, management and certain other investors
entered into an operating agreement at the effective time of the
Recapitalization. The operating agreement provides, among other things, that any
person acquiring limited liability company units of CRL Acquisition LLC who is
required by the operating agreement or by any other agreement or plan of CRL
Acquisition LLC to become a party to the operating agreement will execute an
agreement to be bound by the operating agreement.

     The terms of the operating agreement restrict transfers of the limited
liability company units of CRL Acquisition LLC by certain investors or
management and certain future limited liability company unit holders parties
thereto. The agreement provides for, among other things:

  o  the ability of the other limited liability company unit holders to
     participate in certain sales of units of CRL Acquisition LLC by the DLJMB
     Funds

  o  the ability of the DLJMB Funds to require the other limited liability
     company unit holders to sell limited liability company units of CRL
     Acquisition LLC in certain circumstances should the DLJMB Funds choose to
     sell any such units owned by them

     The operating agreement also provides that DLJMB Funds has the right to
appoint the three members of the board of directors of CRL Acquisition LLC,
including the chairman.

   Investors' Agreement

     Holdings, CRL Acquisition LLC, CRL Holdings, Inc. (a subsidiary of B&L),
management and certain other investors entered into an investors' agreement at
the effective time of the Recapitalization. The investors' agreement

                                       60


<PAGE>



provides, among other things, that any person acquiring shares of common stock
of Holdings who is required by the investors' agreement or by any other
agreement or plan of Holdings to become a party to the investors' agreement will
execute an agreement to be bound by the investors' agreement.

     The terms of the investors' agreement restrict transfers of the shares of
Holdings' common stock by CRL Holdings Inc., management and certain other
investors and certain future shareholders parties thereto. The agreement
provides for, among other things:

   o the ability of certain other shareholders to participate in certain sales
     of shares of Holdings by CRL Acquisition LLC or its permitted transferees

   o the ability of DLJMB Funds or CRL Acquisition LLC to require the other
     shareholders to sell shares of Holdings in certain circumstances should the
     DLJMB Funds or CRL Acquisition LLC choose to sell any such shares owned by
     them

   o certain registration rights with respect to shares of common stock of
     Holdings, including rights to indemnification against certain liabilities,
     including liabilities under the Securities Act

   o the right of CRL Holdings Inc. to sell to Holdings all of the common stock
     of Holdings acquired by it as of the closing date of the Recapitalization
     and still held by it, beginning on the date that substantially all of the
     debt of Holdings and its subsidiaries is either repaid or refinanced and
     such refinanced debt permits it (such right terminates upon the occurrence
     of certain events, including an initial public offering, or 12 years from
     the closing date of the Recapitalization)

   o pre-emptive rights of all the parties, other than CRL Acquisition LLC and
     its permitted transferees, to acquire its pre-emptive portion of Holdings
     common stock in certain instances when Holdings proposes to issue common
     stock

     The investors' agreement also provides that DLJ Merchant Banking Partners
II, L.P. has the right to appoint seven of the nine members of the board of
directors of Holdings, including the chairman.

Transactions with Officers and Directors

     In connection with the Recapitalization, certain of our officers purchased
units of CRL Acquisition LLC, some of whom also borrowed funds up to a maximum
aggregate amount of $1.3 million from DLJ Inc. secured by their units. James C.
Foster borrowed $.3 million and each of Real H. Renaud, Thomas F. Ackerman and
Dennis R. Shaughnessy borrowed approximately $0.2 million. Two weeks after the
consummation of the Recapitalization, the loans matured and were repaid by the
officers, partially with funds borrowed from Charles River up to a maximum
aggregate amount of $.9 million. The loans from Charles River matures in ten
years and interest accrues at the initial rate of the Term Loan B of the new
credit facility. Each loan is secured by units in CRL Acquisition LLC held by
the borrower, 25% of each loan is recourse to the borrower and all proceeds from
the sale of such equity and options will be used to pay down the loan until it
is repaid in full. All payments due under each loan accelerates immediately upon
the termination of the borrower's employment with Charles River for any reason.

                                       61


<PAGE>



                       DESCRIPTION OF NEW CREDIT FACILITY

     The new credit facility was provided by a syndicate of financial
institutions led by DLJ Capital Funding, as sole book runner, lead arranger and
syndication agent. The new credit facility includes a $40.0 million term loan A
facility, a $120.0 million term loan B facility and a $30.0 million revolving
credit facility, which provides for loans and under which up to $15.0 million in
letters of credit may be issued. The term loan A facility matures six years
after the closing date of the facility, the term loan B facility matures eight
years after the closing date of the facility and the revolving facility matures
six years after the closing date of the facility. The revolving credit facility
is subject to a potential, but uncommitted, increase of up to $25 million at our
request at any time prior to such revolving credit facility maturity date. Such
increase will be available only if one or more financial institutions agrees, at
the time of our request, to provide it.

     Loans under the term loan A facility and the revolving facility will bear
interest, at our option, at the alternate base rate or the reserve adjusted
LIBOR rate plus, in each case, applicable margins of 3.00% for LIBOR loans and
1.75% for base rate loans. Loans under the term loan B facility will bear
interest, at our option, at the alternate base rate or the reserve adjusted
LIBOR rate plus, in each case, applicable margins of 3.75% for LIBOR loans and
2.50% for base rate loans. We pay commitment fees in an amount equal to 0.50%
per annum on the daily average unused portion of the revolving credit facility.
Such fees are payable quarterly in arrears and upon the maturity or termination
of the revolving credit facility. Beginning approximately six months after the
closing date of the new credit facility, the applicable margins applicable to
loans under the term loan A facility and the revolving facility and commitment
fees will be determined based on the ratio (the "Leverage Ratio") of
consolidated total debt to consolidated EBITDA (as defined in the new credit
facility) of us and our restricted subsidiaries (as defined in the new credit
facility).

     We will pay a letter of credit fee on the outstanding undrawn amounts of
letters of credit issued under the new credit facility at a rate per year equal
to the margin applicable to LIBOR loans under the revolving facility (in the
case of standby letters of credit) or 1.25% (in the case of commercial letters
of credit), which shall be shared by all lenders participating in the relevant
letters of credit. In addition, we will pay an additional fee to the issuer of
each letter of credit in an amount agreed between us and the issuer.

     The term loan A is subject to the following amortization schedule:

<TABLE>
                                                                 Term Loan
Year                                                         Amortization (%)
- -----                                                        ----------------
<S>                                                                <C>
1............................................................       0%
2............................................................        5
3............................................................       10
4............................................................       20
5............................................................       25
6............................................................       40
</TABLE>

     The term loan B is subject to the following amortization schedule:

<TABLE>

                                                                 Term Loan
Year                                                         Amortization (%)
- -----                                                        ----------------
<S>                                                                 <C>
1-7..........................................................         1%
8............................................................        93
</TABLE>

                                       62


<PAGE>



     The new credit facility is subject to mandatory prepayment:

  o  with the net cash proceeds of the sale or other disposition of any property
     or assets of, or receipt of casualty proceeds by, us or any of our
     restricted subsidiaries, subject to certain exceptions, including an
     exception for reinvestment in our and our restricted subsidiaries'
     business,

  o  with 50% of the net cash proceeds received from the issuance of equity
     securities of Holdings, us or any of our restricted subsidiaries (subject
     to certain exceptions) so long as the Leverage Ratio following such payment
     would exceed 3.5:1,

   o with the net cash proceeds received from issuances of debt securities by
     Holdings, us or any of our restricted subsidiaries (subject to certain
     exceptions) and

   o with 50% of excess cash flow (as defined in the new credit facility) for
     each fiscal year so long as the Leverage Ratio following such payment would
     exceed 3.5:1.

     All mandatory prepayment amounts will be applied first to the prepayment of
the term loans.

     All of our future domestic restricted subsidiaries will be guarantors of
the new credit facility. Our obligations under the new credit facility will be
secured by:

   o all of our stock,

     all of our existing and after-acquired personal property and all the
     existing and after-acquired personal property of our future domestic
     restricted subsidiaries, including a pledge of all of the equity interests
     of all our future restricted subsidiaries held by us or any of our
     restricted subsidiaries and no more than 65% of the equity interests of any
     foreign restricted subsidiary, and all intercompany debt in our favor,

   o first-priority perfected liens on all of our material existing and
     after-acquired real property fee and leasehold interests, subject to
     customary permitted liens (as defined in the new credit facility), and

   o a negative pledge on all of our and our subsidiaries' assets.

     The new credit facility contains customary covenants and restrictions on
our ability to engage in certain activities, including, but not limited to:

   o limitations on other indebtedness, liens, investments and guarantees,

   o restrictions on dividends and redemptions and payments on subordinated debt
     and

   o restrictions on mergers and acquisitions, sales of assets and leases.

     The new credit facility also contains financial covenants requiring us to
maintain a minimum EBITDA, minimum coverage of interest expense, minimum
coverage of fixed charges and a maximum leverage ratio. The new credit facility
contains customary events of default and a cross-default to indebtedness of
Holdings.

     Borrowings and reimbursement obligations under the new credit facility are
subject to significant conditions, including compliance with certain financial
ratios and the absence of any material adverse change. See "Risk Factors--Risks
relating to our debt."

                                       63


<PAGE>



                              DESCRIPTION OF NOTES

     General

     The old notes were issued, and the new notes will be issued, pursuant to an
indenture between Charles River and State Street Bank and Trust Company, as
trustee. The terms of the notes include those stated in the indenture and those
made part of the indenture by reference to the Trust Indenture Act of 1939, as
amended. The notes are subject to all those terms, and holders of notes are
referred to the indenture and the Trust Indenture Act for a statement thereof.
Copies of the proposed form of indenture and registration rights agreement are
available as set forth below under "--Additional Information."

     The terms of the new notes are identical in all material respects to the
terms of the old notes, except that the new notes are not guaranteed by any
subsidiaries since the subsidiaries which guaranteed the old notes have been
merged into Charles River, the old notes contain transfer restrictions and
registration rights and, if the registration statement relating to this exchange
offer is not declared effective on or prior to 180 days after the closing of the
old notes, which was on September 29, 1999, holders of old notes that have
complied with their obligations under the registration rights agreement will be
entitled, subject to exceptions, to liquidated damages in an amount equal to
$0.05 per week per $1,000 principal amount of notes held by such holder and
increasing every 90 days thereafter up to a maximum amount equal to $0.25 per
week per $1,000 principal amount of notes until the registration statement is
declared effective.

     The following description is a summary of the material provisions of the
indenture. It is not complete and is qualified in its entirety by reference to
the indenture, including the definitions therein of certain terms used below. We
urge you to read the indenture because it, and not this description, defines
your rights as a holder of the notes.

     The definitions of certain terms used in the following summary are set
forth below under "--Certain Definitions." For purposes of this summary, the
term "Charles River" refers only to Charles River Laboratories, Inc. and not to
any of its Subsidiaries.

     The notes will:

   o be general unsecured obligations of Charles River

   o rank junior in right of payment to all existing and future Senior
     Indebtedness of Charles River, including borrowings under our New Credit
     Facility

   o rank equally in right of payment with any future senior subordinated
     Indebtedness of Charles River

   o rank senior in right of payment to all future subordinated Indebtedness of
     Charles River and

   o be effectively junior to all liabilities of Charles River's subsidiaries

     On a pro forma basis, after giving effect to the Transactions, as of
September 25, 1999, we had outstanding approximately $163.3 million of Senior
Indebtedness and our subsidiaries had $5.2 million of outstanding liabilities,
including trade payables but excluding intercompany obligations. The indenture
will permit Charles River and its Subsidiaries to incur additional Indebtedness,
including Senior Indebtedness, in the future. See "Risk Factors--The notes are
subordinated to our other debt" and "--Certain Covenants--Incurrence of
Indebtedness and Issuance of Preferred Stock."

     As of the date of the indenture, all of our Subsidiaries will be Restricted
Subsidiaries. However, so long as we satisfy the conditions described in the
definition of "Unrestricted Subsidiary," we will be permitted to designate
current or future Subsidiaries as "Unrestricted" Subsidiaries that are not
subject to the restrictive covenants included in the indenture.

                                       64


<PAGE>



Principal, Maturity and Interest

   o The notes will initially be limited in aggregate principal amount to $150.0
     million and will mature on October 1, 2009.

   o The notes will be issued in denominations of $1,000 and integral multiples
     thereof.

   o Interest on the notes will accrue at the rate of 13.5% per year; provided
     that the rate at which interest accrues will increase to 14.0% per year on
     August 15, 2000 in the event that the Ratio of Consolidated Net Debt to
     Consolidated Cash Flow for Charles River as of June 30, 2000 is equal to or
     greater than 5.00 to 1.

   o We will pay interest in arrears every October 1 and April 1, commencing on
     April 1, 2000, to holders of record on the immediately preceding September
     15 and March 15.

   o Interest on the notes will accrue from the most recent date to which
     interest has been paid or, if no interest has been paid, from the date of
     original issuance.

   o Interest will be computed on the basis of a 360-day year comprised of
     twelve 30-day months.

     We will pay principal of, premium, if any, and interest and liquidated
damages, if any, on the notes:

   o at the office or agency we maintain for that purpose within the City and
     State of New York

   o or, at our option, by check mailed to the holders of the notes at their
     respective addresses set forth in the register of holders of notes

   o however, all payments with respect to notes represented by one or more
     permanent Global Notes will be paid by wire transfer of immediately
     available funds to the account of the Depository Trust Company or any
     successor thereto.

     Until we designate another office or agency, our office or agency in New
York will be the office of the trustee maintained for that purpose.

     Subject to the covenants described below, we may issue additional notes
under the indenture having the same terms in all respects as the notes, or
similar in all respects except for the payment of interest on the notes (1)
scheduled and paid prior to the date of issuance of those additional notes or
(2) payable on the first Interest Payment Date following that date of issuance.
The notes offered hereby and any additional notes would be treated as a single
class for all purposes under the indenture.

Subordination

     The payment of Subordinated Note Obligations will be subordinated in right
of payment, as set forth in the indenture, to the prior payment in full in cash
or cash equivalents of all Senior Indebtedness, whether outstanding on the date
of the indenture or thereafter incurred.

     Upon any distribution to creditors of Charles River in a liquidation or
dissolution of Charles River or in a bankruptcy, reorganization, insolvency,
receivership or similar proceeding relating to Charles River or its property, an
assignment for the benefit of creditors or any marshaling of Charles River's
assets and liabilities,

          (1) the holders of Senior Indebtedness will be entitled to receive
     payment in full in cash or cash equivalents of all Obligations due in
     respect of such Senior Indebtedness, including interest after the
     commencement of any such proceeding at the rate specified in the applicable
     Senior Indebtedness, before the holders of notes will be entitled to
     receive any payment with respect to the Subordinated Note Obligations, and

                                       65


<PAGE>



          (2) until all Obligations with respect to Senior Indebtedness are paid
     in full in cash or cash equivalents, any distribution to which the holders
     of notes would be entitled shall be made to the holders of Senior
     Indebtedness.

     However, holders of notes may receive and retain Permitted Junior
Securities and payments made from the trust described under "--Legal Defeasance
and Covenant Defeasance."

     Charles River also may not make any payment upon or in respect of the
Subordinated Note Obligations, except in Permitted Junior Securities or from the
trust described under "--Legal Defeasance and Covenant Defeasance," until all
obligations with respect to Senior Indebtedness have been paid in full in cash
or cash equivalents if:

          (1) a default in the payment of the principal (including reimbursement
     obligations in respect of letters of credit) of, premium, if any, or
     interest on or commitment, letter of credit or administrative fees relating
     to, Designated Senior Indebtedness occurs and is continuing beyond any
     applicable period of grace; or

          (2) any other default occurs and is continuing with respect to
     Designated Senior Indebtedness that permits holders of the Designated
     Senior Indebtedness as to which that default relates to accelerate its
     maturity and the trustee receives a notice of that default (a "Payment
     Blockage Notice") from Charles River or the holders of any Designated
     Senior Indebtedness.

     Payments on the notes may and shall be resumed:

          (1) in the case of a payment default, upon the date on which that
     default is cured or waived; and

          (2) in case of a nonpayment default, the earlier of the date on which
     that nonpayment default is cured or waived or 179 days after the date on
     which the applicable Payment Blockage Notice is received, unless the
     maturity of any Designated Senior Indebtedness has been accelerated.

     No new period of payment blockage may be commenced unless and until 360
days have elapsed since the effectiveness of the immediately prior Payment
Blockage Notice. No nonpayment default that existed or was continuing on the
date of delivery of any Payment Blockage Notice to the trustee shall be, or be
made, the basis for a subsequent Payment Blockage Notice unless that default
shall have been waived or cured for a period of not less than 90 days.

     "Designated Senior Indebtedness" means:

          (1) any Indebtedness outstanding under the New Credit Facility; and

          (2) any other Senior Indebtedness permitted under the indenture the
     principal amount of which is $25.0 million or more and that has been
     designated by Charles River in writing to the trustee as "Designated Senior
     Indebtedness."

     "Permitted Junior Securities" means Equity Interests in Charles River or
debt securities of Charles River that are subordinated to all Senior
Indebtedness and any debt securities issued in exchange for Senior Indebtedness
to substantially the same extent as, or to a greater extent than, the notes are
subordinated to Senior Indebtedness.

     "Senior Indebtedness" means, with respect to any Person:

          (1) all Obligations of that Person outstanding under the New Credit
     Facility and all Hedging Obligations payable to a lender or an Affiliate
     thereof or to a Person that was a lender or an Affiliate thereof at the
     time the contract was entered into under the New Credit Facility or any of
     its Affiliates, including, without limitation, interest accruing subsequent
     to the filing of, or which would have accrued but for the filing of, a
     petition for bankruptcy, whether or not that interest is an allowable claim
     in that bankruptcy proceeding;

                                       66


<PAGE>



          (2) any other Indebtedness, unless the instrument under which that
     Indebtedness is incurred expressly provides that it is subordinated in
     right of payment to any other Senior Indebtedness of that Person; and

          (3) all Obligations with respect to the foregoing.

     Notwithstanding anything to the contrary in the foregoing, Senior
Indebtedness will not include:

               (a) any liability for federal, state, local or other taxes;

               (b) any Indebtedness of that Person, other than pursuant to the
          New Credit Facility, to

     any of its Subsidiaries or other Affiliates;

               (c) any trade payables; or

               (d) any Indebtedness that is incurred in violation of the
          indenture.

     "Subordinated Note Obligations" means all Obligations with respect to the
notes, including, without limitation, principal, premium, if any, interest and
liquidated damages, if any, payable pursuant to the terms of the notes
(including upon the acceleration or redemption thereof), together with and
including any amounts received or receivable upon the exercise of rights of
rescission or other rights of action, including claims for damages, or
otherwise.

     We will promptly notify holders of Senior Indebtedness if payment of the
notes is accelerated because of an Event of Default.

     As a result of the subordination provisions described above, in the event
of a liquidation or insolvency, holders of notes may recover less ratably than
creditors of Charles River who are holders of Senior Indebtedness.

Optional Redemption

     Except as provided below, the notes will not be redeemable at Charles
River's option prior to October 1, 2004. Thereafter, the notes will be subject
to redemption at any time at the option of Charles River, in whole or in part,
upon not less than 30 nor more than 60 days' notice, in cash at the redemption
prices (expressed as percentages of principal amount) set forth below, plus
accrued and unpaid interest and liquidated damages, if any, thereon to the
applicable redemption date, if redeemed during the twelve-month period beginning
on October 1 of the years indicated below:

<TABLE>

Year                                                   Percentage
- ----                                                   ----------
<S>                                                    <C>
2004.................................................. 106.750%
2005.................................................. 104.500%
2006.................................................. 102.250%
2007 and thereafter................................... 100.000%
</TABLE>

     Notwithstanding the foregoing, on or prior to October 1, 2002, Charles
River may redeem up to 35% of the aggregate principal amount of notes from time
to time originally issued under the indenture in cash at a redemption price of
113.500% of the principal amount thereof, plus accrued and unpaid interest and
liquidated damages, if any, thereon to the redemption date, with the net cash
proceeds of one or more Public Equity Offerings; provided that:

          (1) at least 65% of the aggregate principal amount of notes from time
     to time originally issued under the indenture remains outstanding
     immediately after the occurrence of the redemption; and

                                       67


<PAGE>



          (2) the redemption shall occur within 90 days of the date of the
     closing of any such Public Equity Offering.

Selection and Notice

     If less than all of the notes are to be redeemed at any time, the trustee
will select the notes for redemption as follows:

          (1) in compliance with the requirements of the principal national
     securities exchange, if any, on which the notes are listed; or

          (2) if the notes are not so listed, on a pro rata basis, by lot or by
     another method the trustee considers fair and appropriate;

     provided that no notes of $1,000 or less shall be redeemed in part.

     Notices of redemption shall be mailed by first class mail at least 30 but
not more than 60 days before the redemption date to each holder of notes to be
redeemed at its registered address. Notices of redemption may not be
conditional.

     If any note is to be redeemed in part only, the notice of redemption that
relates to that note shall state the portion of the principal amount thereof to
be redeemed. A new note in principal amount equal to the unredeemed portion
thereof will be issued in the name of the holder thereof upon cancellation of
the original note. Notes called for redemption become due on the date fixed for
redemption. On and after the redemption date, interest ceases to accrue on notes
or portions of them called for redemption.

Mandatory Redemption

     Charles River is not required to make mandatory redemption of, or sinking
fund payments with respect to, the notes.

Repurchase at the Option of Holders

     Change of Control

     Upon the occurrence of a Change of Control, each holder of notes will have
the right to require Charles River to repurchase all or any part (equal to
$1,000 or an integral multiple thereof) of that holder's notes pursuant to the
offer described below (the "Change of Control Offer") at an offer price in cash
equal to 101% of the aggregate principal amount thereof, plus accrued and unpaid
interest and liquidated damages, if any, thereon to the date of repurchase (the
"Change of Control Payment"). Within 60 days following any Change of Control,
Charles River will, or will cause the trustee to, mail a notice to each holder
describing the transaction or transactions that constitute the Change of Control
and offering to repurchase notes on the date specified in that notice, which
date shall be no earlier than 30 days and no later than 60 days from the date
that notice is mailed (the "Change of Control Payment Date"), pursuant to the
procedures required by the indenture and described in that notice. Charles River
will comply with the requirements of Rule 14e-1 under the Exchange Act and any
other securities laws and regulations thereunder to the extent those laws and
regulations are applicable in connection with the repurchase of the notes as a
result of a Change of Control. To the extent that the provisions of any
securities laws or regulations conflict with the provisions of the indenture
relating to a Change of Control Offer, Charles River will comply with the
applicable securities laws and regulations and shall not be deemed to have
breached its obligations described in the indenture by virtue thereof.

     On the Change of Control Payment Date, Charles River will, to the extent
lawful:

          (1) accept for payment all notes or portions thereof properly tendered
     pursuant to the Change of Control Offer;

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          (2) deposit with the Paying Agent an amount equal to the Change of
     Control Payment in respect of all notes or portions thereof so tendered;
     and

          (3) deliver or cause to be delivered to the trustee the notes so
     accepted together with an Officers' Certificate stating the aggregate
     principal amount of notes or portions thereof being purchased by Charles
     River.

     The Paying Agent will promptly mail to each holder of notes so tendered the
Change of Control Payment for that holder's notes, and the trustee will promptly
authenticate and mail or cause to be transferred by book-entry to each holder a
new note equal in principal amount to any unpurchased portion of the notes
surrendered, if any; provided that each new note will be in a principal amount
of $1,000 or an integral multiple thereof.

     The indenture will provide that, prior to complying with the provisions of
this covenant, but in any event within 90 days following a Change of Control,
Charles River will either repay all outstanding Senior Indebtedness or obtain
the requisite consents, if any, under all agreements governing outstanding
Senior Indebtedness to permit the repurchase of notes required by this covenant.
The indenture requires Charles River to publicly announce the results of the
Change of Control Offer on or as soon as practicable after the Change of Control
Payment Date.

     The Change of Control provisions described above will be applicable whether
or not any other provisions of the indenture are applicable. Except as described
above with respect to a Change of Control, the indenture does not contain
provisions that permit the holders of the notes to require that Charles River
repurchase or redeem the notes in the event of a takeover, recapitalization or
similar transaction.

     The New Credit Facility will prohibit Charles River from purchasing any
notes and also will provide that certain change of control events, which may
include events not otherwise constituting a Change of Control under the
indenture, with respect to Charles River would constitute a default thereunder.
Any future credit agreements or other agreements relating to Senior Indebtedness
to which Charles River becomes a party may contain similar restrictions and
provisions. In the event a Change of Control occurs at a time when Charles River
is prohibited from purchasing notes, Charles River could seek the consent of its
lenders to the purchase of notes or could attempt to refinance the borrowings
that contain that prohibition. If Charles River does not obtain such a consent
or repay those borrowings, Charles River will remain prohibited from purchasing
notes. In that case, Charles River's failure to purchase tendered notes would
constitute an Event of Default under the indenture, which would, in turn,
constitute a default under the New Credit Facility. In those circumstances, the
subordination provisions in the indenture would likely restrict payments to the
holders of notes.

     Charles River will not be required to make a Change of Control Offer upon a
Change of Control if a third party makes the Change of Control Offer in the
manner, at the times and otherwise in compliance with the requirements set forth
in the indenture applicable to a Change of Control Offer made by Charles River
and purchases all notes validly tendered and not withdrawn under that Change of
Control Offer.

     "Change of Control" means the occurrence of any of the following:

          (1) the sale, lease, transfer, conveyance or other disposition, other
     than by way of merger or consolidation, in one or a series of related
     transactions, of all or substantially all of the assets of Charles River
     and its Subsidiaries, taken as a whole, to any "person" or "group" (as
     those terms are used in Section 13(d) of the Exchange Act), other than the
     Principals and their Related Parties;

          (2) the adoption of a plan for the liquidation or dissolution of
     Charles River;

          (3) the consummation of any transaction, including, without
     limitation, any merger or consolidation, the result of which is that any
     "person" or "group" (as those terms are used in Section 13(d) of the
     Exchange Act), other than the Principals and their Related Parties, becomes
     the "beneficial owner" (as that term is defined in Rule 13d-3 and Rule
     13d-5 under the Exchange Act), directly or indirectly through one or more
     intermediaries, of 50% or more of the voting power of the outstanding
     voting stock of Charles River; or

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          (4) the first day on which a majority of the members of the board of
     directors of Charles River are not Continuing Members.

     The definition of Change of Control includes a phrase relating to the sale,
lease, transfer, conveyance or other disposition of "all or substantially all"
of the assets of Charles River and its Subsidiaries taken as a whole. Although
there is a developing body of case law interpreting the phrase "substantially
all," there is no precise established definition of the phrase under applicable
law. Accordingly, the ability of a holder of notes to require Charles River to
repurchase notes as a result of a sale, lease, transfer, conveyance or other
disposition of less than all of the assets of Charles River and its Subsidiaries
taken as a whole to another person or group may be uncertain.

     "Continuing Members" means, as of any date of determination, any member of
the board of directors of Charles River who:

          (1) was a member of Charles River's board of directors immediately
     after consummation of the Recapitalization and the Recapitalization
     Financing; or

          (2) was nominated for election or elected to Charles River's board of
     directors with the approval of, or whose election to the board of directors
     was ratified by, at least a majority of the Continuing Members who were
     members of Charles River's board of directors at the time of that
     nomination or election.

Certain Covenants

      Asset Sales

     The indenture will provide that Charles River will not, and will not permit
any of its Restricted Subsidiaries to, consummate an Asset Sale unless:

          (1) Charles River or the Restricted Subsidiary, as the case may be,
     receives consideration at the time of that Asset Sale at least equal to the
     fair market value (evidenced by a resolution of the board of directors set
     forth in an Officers' Certificate delivered to the trustee) of the assets
     or Equity Interests issued or sold or otherwise disposed of; and

          (2) at least 75% of the consideration therefor received by Charles
     River or the Restricted Subsidiary is in the form of:

               (a) cash or Cash Equivalents; or

               (b) property or assets that are used or useful in a Permitted
          Business, or the Capital Stock of any Person engaged in a Permitted
          Business if, as a result of the acquisition by Charles River or any
          Restricted Subsidiary thereof, that Person becomes a Restricted
          Subsidiary.

     For the purposes of this provision, each of the following shall be deemed
to be cash:

               (i) any liabilities, as shown on Charles River's or the
          Restricted Subsidiary's most recent balance sheet, of Charles River or
          any Restricted Subsidiary (other than contingent liabilities and
          liabilities that are by their terms subordinated to the notes or any
          guarantee thereof) that are assumed by the transferee of any such
          assets pursuant to a customary novation agreement that releases
          Charles River or the Restricted Subsidiary from further liability;

               (ii) any securities, notes or other obligations received by
          Charles River or the Restricted Subsidiary from the transferee
          that are converted within 180 days of their receipt by Charles
          River or the Restricted Subsidiary by Charles River or the
          Restricted Subsidiary into cash or Cash Equivalents, but only to
          the extent of the cash or Cash Equivalents received; and

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                (iii) any Designated Noncash Consideration received by
           Charles River or any of its Restricted Subsidiaries in that Asset
           Sale having an aggregate fair market value, taken together with
           all other Designated Noncash Consideration received pursuant to
           this clause (iii) that is at that time outstanding, not to exceed
           15% of Total Assets at the time of the receipt of that Designated
           Noncash Consideration, with the fair market value of each item of
           Designated Noncash Consideration being measured at the time
           received and without giving effect to subsequent changes in
           value.

     The 75% limitation referred to in clause (2) above will not apply to any
Asset Sale in which the cash or Cash Equivalents portion of the consideration
received therefrom, determined in accordance with subclauses (i), (ii) and (iii)
above, is equal to or greater than what the after-tax proceeds would have been
had that Asset Sale complied with the aforementioned 75% limitation.

     Within 365 days after the receipt of any Net Proceeds from an Asset Sale,
Charles River or the Restricted Subsidiary, as the case may be, shall apply the
Net Proceeds, at its option (or to the extent Charles River is required to apply
the Net Proceeds pursuant to the terms of the New Credit Facility), to:

          (1) repay or purchase Senior Indebtedness or Pari Passu Indebtedness
     of Charles River or any Indebtedness of any Restricted Subsidiary, as the
     case may be,

     provided that if Charles River shall so repay or purchase Pari Passu
Indebtedness of Charles River;

               (a) it will equally and ratably reduce Indebtedness under the
          notes if the notes are then redeemable; or

               (b) if the notes may not then be redeemed, Charles River shall
          make an offer, in accordance with the procedures set forth below for
          an Asset Sale Offer, to all holders of notes to purchase at a purchase
          price equal to 100% of the principal amount of the notes, plus accrued
          and unpaid interest and liquidated damages, if any, thereon to the
          date of purchase, the notes that would otherwise be redeemed; or

          (2)(a) an investment in property, the making of a capital expenditure
     or the acquisition of assets that are used or useful in a Permitted
     Business; or

               (b) the acquisition of Capital Stock of any Person primarily
     engaged in a Permitted Business if:

                    (x) as a result of the acquisition by Charles River or any
               Restricted Subsidiary thereof, that Person becomes a Restricted
               Subsidiary; or

                    (y) the Investment in that Capital Stock is permitted by
               clause (6) of the definition of Permitted Investments.

     Pending the final application of any Net Proceeds, Charles River may
temporarily reduce Indebtedness or otherwise invest those Net Proceeds in any
manner that is not prohibited by the indenture.

     Any Net Proceeds from Asset Sales that are not applied or invested as
provided in the first sentence of the second preceding paragraph will be deemed
to constitute "Excess Proceeds." When the aggregate amount of Excess Proceeds
exceeds $10.0 million, Charles River will be required to make an offer to all
holders of notes (an "Asset Sale Offer") to purchase the maximum principal
amount of notes that may be purchased out of the Excess Proceeds, at an offer
price in cash in an amount equal to 100% of the principal amount thereof, plus
accrued and unpaid interest and liquidated damages, if any, thereon to the date
of purchase, in accordance with the procedures set forth in the indenture.

     To the extent that any Excess Proceeds remain after consummation of an
Asset Sale Offer, Charles River may use those Excess Proceeds for any purpose
not otherwise prohibited by the indenture. If the aggregate principal amount of
notes surrendered by holders thereof in connection with an Asset Sale Offer
exceeds the amount of Excess Proceeds, the

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trustee shall select the notes to be purchased as set forth under "--Selection
and Notice." Upon completion of an offer to purchase, the amount of Excess
Proceeds shall be reset at zero.

     Charles River will comply with the requirements of Rule 14e-1 under the
Exchange Act and any other securities laws and regulations thereunder to the
extent those laws and regulations are applicable in connection with the
repurchase of the notes pursuant to an Asset Sale Offer. To the extent that the
provisions of any securities laws or regulations conflict with the provisions of
the indenture relating to an Asset Sale Offer, Charles River will comply with
the applicable securities laws and regulations and shall not be deemed to have
breached its obligations described in the indenture by virtue thereof.

     Restricted Payments

     The indenture will provide that Charles River will not, and will not permit
any of its Restricted Subsidiaries to, directly or indirectly:

          (1) declare or pay any dividend or make any other payment or
     distribution on account of Charles River's or any of its Restricted
     Subsidiaries' Equity Interests other than

   o dividends or distributions payable in Equity Interests other than
     Disqualified Stock of Charles River or

   o dividends or distributions payable to Charles River or any Wholly Owned
     Restricted Subsidiary of Charles River;

          (2) purchase, redeem or otherwise acquire or retire for value any
     Equity Interests of Charles River or Parent other than any of those Equity
     Interests owned by Charles River or any Restricted Subsidiary of Charles
     River;

          (3) make any principal payment on or with respect to, or purchase,
     redeem, defease or otherwise acquire or retire for value, any Indebtedness
     of Charles River that is subordinated in right of payment to the notes,
     except in accordance with the mandatory redemption or repayment provisions
     set forth in the original documentation governing that Indebtedness (but
     not pursuant to any mandatory offer to repurchase upon the occurrence of
     any event); or

          (4) make any Restricted Investment

(all payments and other actions set forth in clauses (1) through (4) above being
collectively referred to as "Restricted Payments"),

unless, at the time of and after giving effect to that Restricted Payment:

          (1) no Default or Event of Default shall have occurred and be
     continuing or would occur as a consequence thereof;

          (2) Charles River would, immediately after giving pro forma effect
     thereto as if that Restricted Payment had been made at the beginning of the
     applicable four-quarter period, have been permitted to incur at least $1.00
     of additional Indebtedness pursuant to the Fixed Charge Coverage Ratio test
     set forth in the first paragraph of the covenant described under the
     caption "--Incurrence of Indebtedness and Issuance of Preferred Stock"; and

          (3) that Restricted Payment, together with the aggregate amount of all
     other Restricted Payments made by Charles River and its Restricted
     Subsidiaries after the date of the indenture (excluding Restricted Payments
     permitted by clauses (1) (to the extent that the declaration of any
     dividend referred to therein reduces amounts available for Restricted
     Payments pursuant to this clause (3)), (2) through (9), (11) through (15)
     and (17) of the next succeeding paragraph), is less than the sum, without
     duplication, of:

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          (a) 50% of the Consolidated Net Income of Charles River for the period
     (taken as one accounting period) commencing June 27, 1999 to the end of
     Charles River's most recently ended fiscal quarter for which internal
     financial statements are available at the time of that Restricted Payment
     (or, if Consolidated Net Income for that period is a deficit, less 100% of
     the deficit); plus

          (b) 100% of the Qualified Proceeds received by Charles River on or
     after the date of the indenture from contributions to Charles River's
     capital or from the issue or sale on or after the date of the indenture of
     Equity Interests of Charles River or of Disqualified Stock or convertible
     debt securities of Charles River to the extent that they have been
     converted into those Equity Interests, other than

       o  Equity Interests, Disqualified Stock or convertible debt securities
          sold to a Subsidiary of Charles River and

       o  Disqualified Stock or convertible debt securities that have been
          converted into Disqualified Stock; plus

     (c) the amount equal to the net reduction in Investments in Persons after
the date of the indenture who are not Restricted Subsidiaries (other than
Permitted Investments) resulting from:

          (i)  Qualified Proceeds received as a dividend, repayment of a loan or
               advance or other transfer of assets (valued at the fair market
               value thereof) to Charles River or any Restricted Subsidiary from
               those Persons;

          (ii) Qualified Proceeds received upon the sale or liquidation of those
               Investments; and

          (iii) the redesignation of Unrestricted Subsidiaries (excluding any
               increase in the amount available for Restricted Payments pursuant
               to clause (10) or (14) below arising from the redesignation of
               that Unrestricted Subsidiary) whose assets are used or useful in,
               or which is engaged in, one or more Permitted Business as
               Restricted Subsidiaries (valued, proportionate to Charles River's
               equity interest in that Subsidiary, at the fair market value of
               the net assets of that Subsidiary at the time of that
               redesignation).

     The foregoing provisions will not prohibit:

     (1) the payment of any dividend within 60 days after the date of
declaration thereof, if at said date of declaration, the payment would have
complied with the provisions of the indenture;

     (2) the redemption, repurchase, retirement, defeasance or other acquisition
of any subordinated Indebtedness or Equity Interests of Charles River in
exchange for, or out of the net cash proceeds of the substantially concurrent
sale (other than to a Subsidiary of Charles River) of other Equity Interests of
Charles River (other than any Disqualified Stock), provided that the amount of
any such net cash proceeds that are utilized for any such redemption,
repurchase, retirement, defeasance or other acquisition shall be excluded from
clause (3)(b) of the preceding paragraph;

     (3) the defeasance, redemption, repurchase, retirement or other acquisition
of subordinated Indebtedness of Charles River with the net cash proceeds from an
incurrence of, or in exchange for, Permitted Refinancing Indebtedness;

     (4) the repurchase, redemption or other acquisition or retirement for value
of any Equity Interests of Charles River or Parent or CRL Acquisition LLC held
by any member of Parent's, Charles River's (or any of its Restricted
Subsidiaries') management pursuant to any management equity subscription
agreement or stock option agreement and any dividend to Parent to fund any such
repurchase, redemption acquisition or retirement; provided that:

          (a) the aggregate price paid for all such repurchased, redeemed,
     acquired or retired Equity Interests shall not exceed:

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               (i)  $5.0 million in any calendar year, with unused amounts in
                    any calendar year being carried over to succeeding calendar
                    years subject to a maximum (without giving effect to the
                    following clause (ii)) of $10.0 million in any calendar
                    year; plus

               (ii) the aggregate net cash proceeds received by Charles River
                    during that calendar year from any reissuance of Equity
                    Interests by Charles River, Parent or CRL Acquisition LLC to
                    members of management of Charles River and its Restricted
                    Subsidiaries; provided that the amount of any such net cash
                    proceeds that are used to permit an acquisition or
                    retirement for value pursuant to this clause (4) shall be
                    excluded from clause (3)(b) of the preceding paragraph; and

          (b) no Default or Event of Default shall have occurred and be
     continuing immediately after that transaction;

     (5)   payments and transactions in connection with

       o  the Transactions, including any purchase price adjustment or any other
          payments made pursuant to or as contemplated in the Transaction
          Agreements or the financial advisory agreements with DLJ Securities
          Corporation described under "Certain Relationships and Related Party
          Transactions,"

       o  the Transaction Financing,

       o  the Offering,

       o  the New Credit Facility (including commitment, syndication and
          arrangement fees payable thereunder) and

       o  the application of the proceeds thereof, and the payment of fees and
          expenses with respect thereto;

     (6) the payment of dividends or the making of loans or advances by Charles
River to Parent not to exceed $2.5 million in any fiscal year for costs and
expenses incurred by Parent in its capacity as a holding company for services
rendered by Parent on behalf of Charles River;

     (7) payments or distributions to Parent pursuant to any Tax Sharing
Agreement;

     (8) the payment of dividends by a Restricted Subsidiary on any class of
common stock of that Restricted Subsidiary if:

          (a)   that dividend is paid pro rata to all holders of that class of
     common stock; and

          (b) at least 50.1% of that class of common stock is held by Charles
     River or one or more of its Restricted Subsidiaries;

     (9) the repurchase of any class of common stock of a Restricted Subsidiary
if:

          (a) that repurchase is made pro rata with respect to that class of
     common stock; and

          (b) at least 50.1% of that class of common stock is held by Charles
     River or one or more of its Restricted Subsidiaries;

     (10) any other Restricted Investment made in a Permitted Business which,
together with all other Restricted Investments made pursuant to this clause (10)
since the date of the indenture, does not exceed $5.0 million (in each case,
after giving effect to all subsequent reductions in the amount of any Restricted
Investment made pursuant to this clause (10), either as a result of (i) the
repayment or disposition thereof for cash or (ii) the redesignation of an
Unrestricted Subsidiary as a Restricted Subsidiary (valued, proportionate to
Charles River's equity interest in that Subsidiary at the time of that
redesignation, at the fair market value of the net assets of that Subsidiary at
the time of

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that redesignation), in the case of clause (i) and (ii), not to exceed the
amount of the Restricted Investment previously made pursuant to this clause
(10); provided that no Default or Event of Default shall have occurred and be
continuing immediately after making that Restricted Investment;

    (11) the declaration and payment of dividends to holders of any class or
series of Disqualified Stock of Charles River or any Restricted Subsidiary
issued on or after the date of the indenture in accordance with the covenant
described under the caption "--Incurrence of Indebtedness and Issuance of
Preferred Stock;" provided that no Default or Event of Default shall have
occurred and be continuing immediately after making that Restricted Payment;

    (12) repurchases of Equity Interests deemed to occur upon exercise of stock
options if those Equity Interests represent a portion of the exercise price of
those options;

    (13) any other Restricted Payment which, together with all other Restricted
Payments made pursuant to this clause (13) since the date of the indenture, does
not exceed $5.0 million, in each case, after giving effect to all subsequent
reductions in the amount of any Restricted Investment made pursuant to this
clause (13) either as a result of (i) the repayment or disposition thereof for
cash or (ii) the redesignation of an Unrestricted Subsidiary as a Restricted
Subsidiary (valued, proportionate to Charles River's equity interest in that
Subsidiary at the time of that redesignation, at the fair market value of the
net assets of that Subsidiary at the time of that redesignation), in the case of
clause (i) and (ii), not to exceed the amount of the Restricted Investment
previously made pursuant to this clause (13); provided that no Default or Event
of Default shall have occurred and be continuing immediately after making that
Restricted Payment;

    (14) the pledge by Charles River of the Capital Stock of an Unrestricted
Subsidiary of Charles River to secure Non-Recourse Debt of that Unrestricted
Subsidiary;

    (15) the purchase, redemption or other acquisition or retirement for value
of any Equity Interests of any Restricted Subsidiary issued after the date of
the indenture, provided that the aggregate price paid for any such repurchased,
redeemed, acquired or retired Equity Interests shall not exceed the sum of:

          (a) the amount of cash and Cash Equivalents received by that
      Restricted Subsidiary from the issue or sale thereof; and

          (b) any accrued dividends thereon the payment of which would be
      permitted pursuant to clause (11) above;

    (16) any Investment in an Unrestricted Subsidiary that is funded by
Qualified Proceeds received by Charles River on or after the date of the
indenture from contributions to Charles River's capital or from the issue and
sale on or after the date of the indenture of Equity Interests of Charles River
or of Disqualified Stock or convertible debt securities to the extent they have
been converted into that Equity Interests (other than Equity Interests,
Disqualified Stock or convertible debt securities sold to a Subsidiary of
Charles River and other than Disqualified Stock or convertible debt securities
that have been converted into Disqualified Stock) in an amount (measured at the
time that Investment is made and without giving effect to subsequent changes in
value) that does not exceed the amount of those Qualified Proceeds (excluding
any such Qualified Proceeds to the extent utilized to permit a prior "Restricted
Payment" pursuant to clause (3)(b) of the preceding paragraph); and

    (17) distributions or payments of Receivables Fees.

     The board of directors of Charles River may designate any Restricted
Subsidiary to be an Unrestricted Subsidiary if that designation would not cause
a Default. For purposes of making that designation, all outstanding Investments
by Charles River and its Restricted Subsidiaries (except to the extent repaid in
cash) in the Subsidiary so designated will be deemed to be Restricted Payments
at the time of that designation and will reduce the amount available for
Restricted Payments under the first paragraph of this covenant. All such
outstanding Investments will be deemed to constitute Restricted Investments in
an amount equal to the greater of

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     (1)   the net book value of that Investments at the time of that
designation and

     (2) the fair market value of that Investments at the time of that
designation.

     That designation will only be permitted if that Restricted Investment would
be permitted at that time and if that Restricted Subsidiary otherwise meets the
definition of an Unrestricted Subsidiary.

     The amount of

     (1) all Restricted Payments (other than cash) shall be the fair market
value on the date of the Restricted Payment of the asset(s) or securities
proposed to be transferred or issued by Charles River or that Restricted
Subsidiary, as the case may be, pursuant to the Restricted Payment and

     (2) Qualified Proceeds (other than cash) shall be the fair market value on
the date of receipt thereof by Charles River of those Qualified Proceeds.

     The fair market value of any non-cash Restricted Payment shall be
determined by the board of directors of Charles River whose resolution with
respect thereto shall be delivered to the trustee.

     Not later than the date of making any Restricted Payment, Charles River
shall deliver to the trustee an Officers' Certificate stating that the
Restricted Payment is permitted and setting forth the basis upon which the
calculations required by the covenant "Restricted Payments" were computed.

     Incurrence of Indebtedness and Issuance of Preferred Stock

     The indenture will provide that:

     (1) Charles River will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, create, incur, issue, assume, guarantee
or otherwise become directly or indirectly liable, contingently or otherwise,
with respect to (collectively, "incur") any Indebtedness (including Acquired
Indebtedness);

     (2) Charles River will not, and will not permit any of its Restricted
Subsidiaries to, issue any shares of Disqualified Stock; and

     (3)   Charles River will not permit any of its Restricted Subsidiaries to
issue any shares of preferred stock;

provided that Charles River or any Restricted Subsidiary may incur Indebtedness,
including Acquired Indebtedness, or issue shares of Disqualified Stock if the
Fixed Charge Coverage Ratio for Charles River's most recently ended four full
fiscal quarters for which internal financial statements are available
immediately preceding the date on which that additional Indebtedness is incurred
or that Disqualified Stock is issued would have been at least 2.0 to 1 if such
four-quarter period ended prior to September 30, 2002 and 2.25 to 1 thereafter,
determined on a consolidated pro forma basis, including a pro forma application
of the net proceeds therefrom, as if the additional Indebtedness had been
incurred, or the Disqualified Stock had been issued, as the case may be, at the
beginning of that four-quarter period.

     The provisions of the first paragraph of this covenant will not apply to
the incurrence of any of the following items of Indebtedness (collectively,
"Permitted Indebtedness"):

     (1) the incurrence by Charles River and its Restricted Subsidiaries of
Indebtedness under the New Credit Facility and the Foreign Credit Facilities;
provided that the aggregate principal amount of all Indebtedness (with letters
of credit being deemed to have a principal amount equal to the maximum potential
liability of Charles River and those Restricted Subsidiaries thereunder) then
classified as having been incurred in reliance upon this clause (1) that remains
outstanding under the New Credit Facility and the Foreign Credit Facilities
after giving effect to that incurrence does not exceed an amount equal to $215.0
million;

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     (2) the incurrence by Charles River and its Restricted Subsidiaries of
Existing Indebtedness;

     (3) the incurrence by Charles River of Indebtedness represented by the
notes and the indenture and any guarantees thereof by its Restricted
Subsidiaries pursuant to "Note Guarantees";

     (4) the incurrence by Charles River or any of its Restricted Subsidiaries
of Indebtedness represented by Capital Expenditure Indebtedness, Capital Lease
Obligations or other obligations, in each case, the proceeds of which are used
solely for the purpose of financing all or any part of the purchase price or
cost of construction or improvement of property, plant or equipment (including
acquisitions of Capital Stock of a Person that becomes a Restricted Subsidiary
to the extent of the fair market value of the property, plant or equipment so
acquired) used in the business of Charles River or that Restricted Subsidiary,
in an aggregate principal amount (or accreted value, as applicable) not to
exceed $20.0 million outstanding after giving effect to that incurrence;

     (5) Indebtedness arising from agreements of Charles River or any Restricted
Subsidiary providing for indemnification, adjustment of purchase price or
similar obligations, in each case, incurred or assumed in connection with the
disposition of any business, assets or a Subsidiary, other than guarantees of
Indebtedness incurred by any Person acquiring all or any portion of such
business, assets or Restricted Subsidiary for the purpose of financing that
acquisition; provided that:

     (a) that Indebtedness is not reflected on the balance sheet of Charles
River or any Restricted Subsidiary (contingent obligations referred to in a
footnote or footnotes to financial statements and not otherwise reflected on the
balance sheet will not be deemed to be reflected on that balance sheet for
purposes of this clause (a)); and

     (b) the maximum assumable liability in respect of that Indebtedness shall
at no time exceed the gross proceeds including non-cash proceeds (the fair
market value of those non-cash proceeds being measured at the time received and
without giving effect to any subsequent changes in value) actually received by
Charles River and/or that Restricted Subsidiary in connection with that
disposition;

     (6) the incurrence by Charles River or any of its Restricted Subsidiaries
of Permitted Refinancing Indebtedness in exchange for, or the net proceeds of
which are used to refund, refinance or replace Indebtedness (other than
intercompany Indebtedness) that was permitted by the indenture to be incurred;

     (7) the incurrence by Charles River or any of its Restricted Subsidiaries
of intercompany Indebtedness between or among Charles River and/or any of its
Restricted Subsidiaries; provided that:

          (a) if Charles River is the obligor on that Indebtedness, that
     Indebtedness is expressly subordinated to the prior payment in full in cash
     of all Obligations with respect to the notes; and

          (b) (i) any subsequent issuance or transfer of Equity Interests that
     results in any such Indebtedness being held by a Person other than Charles
     River or a Restricted Subsidiary thereof and (ii) any sale or other
     transfer of any such Indebtedness to a Person that is not either Charles
     River or a Restricted Subsidiary thereof shall be deemed, in each case, to
     constitute an incurrence of that Indebtedness by Charles River or that
     Restricted Subsidiary, as the case may be, that was not permitted by this
     clause (7);

     (8) the incurrence by Charles River or any of its Restricted Subsidiaries
of Hedging Obligations that are incurred for the purpose of fixing or hedging;

          (a) interest rate risk with respect to any floating rate Indebtedness
     that is permitted by the terms of this indenture to be outstanding; and

          (b) exchange rate risk with respect to agreements or Indebtedness of
     that Person payable denominated in a currency other than United States
     dollars;

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provided that those agreements do not increase the Indebtedness of the obligor
outstanding at any time other than as a result of fluctuations in foreign
currency exchange rates or interest rates or by reason of fees, indemnities and
compensation payable thereunder;

     (9) the guarantee by Charles River or any of its Restricted Subsidiaries of
Indebtedness of Charles River or a Restricted Subsidiary of Charles River that
was permitted to be incurred by another provision of this covenant;

    (10) obligations in respect of performance and surety bonds and completion
guarantees (including related letters of credit) provided by Charles River or
any Restricted Subsidiary in the ordinary course of business; and

    (11) the incurrence by Charles River or any of its Restricted Subsidiaries
of additional Indebtedness in an aggregate principal amount (or accreted value,
as applicable) outstanding after giving effect to that incurrence, including all
Permitted Refinancing Indebtedness incurred to refund, refinance or replace any
Indebtedness incurred pursuant to this clause (11), not to exceed $30.0 million.

     For purposes of determining compliance with this covenant:

   o in the event that an item of Indebtedness meets the criteria of more than
     one of the categories of Permitted Indebtedness described in clauses (1)
     through (11) above or is entitled to be incurred pursuant to the first
     paragraph of this covenant, Charles River shall, in its sole discretion,
     classify that item of Indebtedness in any manner that complies with this
     covenant and that item of Indebtedness will be treated as having been
     incurred pursuant to only one of those clauses or pursuant to the first
     paragraph hereof

   o Charles River may, at any time, change the classification of an item of
     Indebtedness (or any portion thereof) to any other clause or to the first
     paragraph hereof; provided that Charles River would be permitted to incur
     that item of Indebtedness (or that portion thereof) pursuant to that other
     clause or the first paragraph hereof, as the case may be, at the time of
     reclassification

   o accrual of interest, accretion or amortization of original issue discount
     will not be deemed to be an incurrence of Indebtedness for purposes of this
     covenant.

     All Indebtedness under the New Credit Facility and the Foreign Credit
Facilities outstanding on the date on which notes are first issued and
authenticated under the indenture shall be deemed to have been incurred on that
date in reliance on the first paragraph of the covenant described under the
caption "--Certain Covenants--Incurrence of Indebtedness and Issuance of
Preferred Stock." As a result, Charles River will be permitted to incur
significant additional secured indebtedness under clause (1) of the definition
of "Permitted Indebtedness." See "Risk Factors."

     Liens

     The indenture will provide that Charles River will not, and will not permit
any of its Restricted Subsidiaries to, directly or indirectly, create, incur,
assume or suffer to exist any Lien, other than a Permitted Lien, that secures
obligations under any Pari Passu Indebtedness or subordinated Indebtedness of
Charles River on any asset or property now owned or hereafter acquired by
Charles River or any of its Restricted Subsidiaries, or any income or profits
therefrom or assign or convey any right to receive income therefrom, unless the
notes are equally and ratably secured with the obligations so secured until such
time as those obligations are no longer secured by a Lien; provided that, in any
case involving a Lien securing subordinated Indebtedness of Charles River, that
Lien is subordinated to the Lien securing the notes to the same extent that
subordinated Indebtedness is subordinated to the notes.

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     Dividend and Other Payment Restrictions Affecting Restricted Subsidiaries

     The indenture will provide that Charles River will not, and will not permit
any of its Restricted Subsidiaries to, directly or indirectly, create or
otherwise cause or suffer to exist or become effective any encumbrance or
restriction on the ability of any Restricted Subsidiary to:

     (1) (a) pay dividends or make any other distributions to Charles River or
any of its Restricted Subsidiaries (i) on its Capital Stock or (ii) with respect
to any other interest or participation in, or measured by, its profits; or

          (b) pay any Indebtedness owed to Charles River or any of its
     Restricted Subsidiaries;

          (2) make loans or advances to Charles River or any of its Restricted
     Subsidiaries; or

          (3) transfer any of its properties or assets to Charles River or any
     of its Restricted Subsidiaries.

     However, the foregoing restrictions will not apply to encumbrances or
restrictions existing under or by reason of:

     (1)   Existing Indebtedness as in effect on the date of the indenture;

     (2) the New Credit Facility as in effect as of the date of the indenture,
and any amendments, modifications, restatements, renewals, increases,
supplements, refundings, replacements or refinancings thereof;

     (3)   the indenture and the notes;

     (4) applicable law and any applicable rule, regulation or order;

     (5) any agreement or instrument of a Person acquired by Charles River or
any of its Restricted Subsidiaries as in effect at the time of that acquisition
(except to the extent created in contemplation of that acquisition), which
encumbrance or restriction is not applicable to any Person, or the properties or
assets of any Person, other than the Person, or the property or assets of the
Person, so acquired, provided that, in the case of Indebtedness, that
Indebtedness was permitted by the terms of the indenture to be incurred;

     (6) customary non-assignment provisions in leases entered into in the
ordinary course of business and consistent with past practices;

     (7) purchase money obligations for property acquired in the ordinary course
of business that impose restrictions of the nature described in clause (5) above
on the property so acquired;

     (8) contracts for the sale of assets, including, without limitation,
customary restrictions with respect to a Subsidiary pursuant to an agreement
that has been entered into for the sale or disposition of all or substantially
all of the Capital Stock or assets of that Subsidiary;

     (9) Permitted Refinancing Indebtedness, provided that the restrictions
contained in the agreements governing that Permitted Refinancing Indebtedness
are, in the good faith judgment of Charles River's board of directors, not
materially less favorable, taken as a whole, to the holders of the notes than
those contained in the agreements governing the Indebtedness being refinanced;

    (10) secured Indebtedness otherwise permitted to be incurred pursuant to the
covenants described under "--Incurrence of Indebtedness and Issuance of
Preferred Stock" and "--Liens" that limit the right of the debtor to dispose of
the assets securing that Indebtedness;

    (11) restrictions on cash or other deposits or net worth imposed by
customers under contracts entered into in the ordinary course of business;

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    (12) other Indebtedness or Disqualified Stock of Restricted Subsidiaries
permitted to be incurred subsequent to the Issuance Date pursuant to the
provisions of the covenant described under "--Incurrence of Indebtedness and
Issuance of Preferred Stock;"

    (13) customary provisions in joint venture agreements and other similar
agreements entered into in the ordinary course of business; and

    (14) restrictions created in connection with any Receivables Facility that,
in the good faith determination of the board of directors of Charles River, are
necessary or advisable to effect that Receivables Facility.

     Merger, Consolidation, or Sale of Assets

     The indenture will provide that Charles River may not consolidate or merge
with or into (whether or not Charles River is the surviving corporation), or
sell, assign, transfer, convey or otherwise dispose of all or substantially all
of its properties or assets in one or more related transactions to, another
Person unless:

     (1) Charles River is the surviving corporation or the Person formed by or
surviving any such consolidation or merger (if other than Charles River) or to
which that sale, assignment, transfer, conveyance or other disposition shall
have been made is a corporation organized or existing under the laws of the
United States, any state thereof or the District of Columbia;

     (2) the Person formed by or surviving any such consolidation or merger (if
other than Charles River) or the Person to which that sale, assignment,
transfer, conveyance or other disposition shall have been made assumes all the
obligations of Charles River under the registration rights agreement, the notes
and the indenture pursuant to a supplemental indenture in a form reasonably
satisfactory to the trustee;

     (3) immediately after that transaction no Default or Event of Default
exists; and

     (4) Charles River or the Person formed by or surviving any such
consolidation or merger (if other than Charles River), or to which that sale,
assignment, transfer, conveyance or other disposition shall have been made

     (a) will, at the time of such transaction and after giving pro forma effect
thereto as if that transaction had occurred at the beginning of the applicable
four-quarter period, be permitted to incur at least $1.00 of additional
Indebtedness pursuant to the Fixed Charge Coverage Ratio test set forth in the
first paragraph of the covenant described under the caption "--Incurrence of
Indebtedness and Issuance of Preferred Stock" or

     (b) would, together with its Restricted Subsidiaries, have a higher Fixed
Charge Coverage Ratio immediately after that transaction (after giving pro forma
effect thereto as if that transaction had occurred at the beginning of the
applicable four-quarter period) than the Fixed Charge Coverage Ratio of Charles
River and its Restricted Subsidiaries immediately prior to that transaction.

     The foregoing clause (4) will not prohibit:

     (a) a merger between Charles River and a Wholly Owned Subsidiary of Parent
created for the purpose of holding the Capital Stock of Charles River;

     (b) a merger between Charles River and a Wholly Owned Restricted
Subsidiary; or

     (c) a merger between Charles River and an Affiliate incorporated solely for
the purpose of reincorporating Charles River in another State of the United
State

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so long as, in each case, the amount of Indebtedness of Charles River and its
Restricted Subsidiaries is not increased thereby.

     The indenture will provide that Charles River will not lease all or
substantially all of its assets to any Person.

     Transactions with Affiliates

     The indenture will provide that Charles River will not, and will not permit
any of its Restricted Subsidiaries to, make any payment to, or sell, lease,
transfer or otherwise dispose of any of its properties or assets to, or purchase
any property or assets from, or enter into or make or amend any transaction,
contract, agreement, understanding, loan, advance or guarantee with, or for the
benefit of, any Affiliate of Charles River (each of the foregoing, an "Affiliate
Transaction"), unless:

     (1) that Affiliate Transaction is on terms that are no less favorable to
Charles River or that Restricted Subsidiary than those that would have been
obtained in a comparable transaction by Charles River or that Restricted
Subsidiary with an unrelated Person; and

     (2) Charles River delivers to the trustee, with respect to any Affiliate
Transaction or series of related Affiliate Transactions involving aggregate
consideration in excess of $7.5 million, either:

     (a) a resolution of the board of directors set forth in an Officers'
Certificate certifying that the relevant Affiliate Transaction complies with
clause (1) above and that the Affiliate Transaction has been approved by a
majority of the disinterested members of the board of directors; or

     (b) an opinion as to the fairness to the holders of that Affiliate
Transaction from a financial point of view issued by an accounting, appraisal or
investment banking firm of national standing.

     Notwithstanding the foregoing, the following items shall not be deemed to
be Affiliate Transactions:

     (1) customary directors' fees, indemnification or similar arrangements or
any employment agreement or other compensation plan or arrangement entered into
by Charles River or any of its Restricted Subsidiaries in the ordinary course of
business (including ordinary course loans to employees not to exceed (a) $5.0
million outstanding in the aggregate at any time and (b) $2.0 million to any one
employee) and consistent with the past practice of Charles River or that
Restricted Subsidiary;

     (2) transactions between or among Charles River and/or its Restricted
Subsidiaries;

     (3) payments of customary fees by Charles River or any of its Restricted
Subsidiaries to the DLJ Merchant Banking funds and their Affiliates made for any
financial advisory, financing, underwriting or placement services or in respect
of other investment banking activities, including, without limitation, in
connection with acquisitions or divestitures which are approved by a majority of
the board of directors in good faith;

     (4) any agreement as in effect on the date of the indenture or any
amendment thereto (so long as that amendment is not disadvantageous to the
holders of the notes in any material respect) or any transaction contemplated
thereby;

     (5) payments and transactions in connection with the Transaction, including
any purchase price adjustment or any other payments made pursuant to the
Transaction Agreements or the financial advisory agreements with DLJ Securities
Corporation described under "Certain Relationships and Related Party
Transactions," and the Transaction Financing, the New Credit Facility (including
commitment, syndication and arrangement fees payable thereunder) and the
Offering (including underwriting discounts and commissions in connection
therewith) and the application of the proceeds thereof, and the payment of the
fees and expenses with respect thereto;

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     (6) Restricted Payments that are permitted by the provisions of the
indenture described under the caption "--Restricted Payments" and any Permitted
Investments; and

     (7) sales of accounts receivable, or participations therein, in connection
with any Receivables Facility.

     Sale and Leaseback Transactions

     The indenture will provide that Charles River will not, and will not permit
any of its Restricted Subsidiaries to, enter into any sale and leaseback
transaction; provided that Charles River or any Restricted Subsidiary may enter
into a sale and leaseback transaction if:

     (1) Charles River or that Restricted Subsidiary, as the case may be, could
have:

          (a) incurred Indebtedness in an amount equal to the Attributable
     Indebtedness relating to that sale and leaseback transaction pursuant to
     the Fixed Charge Coverage Ratio test set forth in the first paragraph of
     the covenant described under the caption "--Incurrence of Indebtedness and
     Issuance of Preferred Stock;" and

          (b) incurred a Lien to secure that Indebtedness pursuant to the
     covenant described under the caption "--Liens;"

     (2) the gross cash proceeds of that sale and leaseback transaction are at
least equal to the fair market value (as determined in good faith by the board
of directors and set forth in an Officers' Certificate delivered to the trustee)
of the property that is the subject of that sale and leaseback transaction; and

     (3) the transfer of assets in that sale and leaseback transaction is
permitted by, and Charles River applies the proceeds of that transaction in
compliance with, the covenant described under the caption "Repurchase at the
Option of Holders--Asset Sales."

     No Senior Subordinated Indebtedness

     The indenture will provide that

     o    Charles River will not Incur any Indebtedness that is subordinated or
          junior in right of payment to any Senior Indebtedness and senior in
          right of payment to the notes, and

     o    no Guarantor will Incur any Indebtedness that is subordinate or
          junior in right of payment to any Senior Indebtedness and senior in
          right of payment to that Guarantor's guarantee (the "Guarantee").

     Note Guarantees

     The Indenture will provide that, if any Wholly-Owned Restricted Subsidiary
of Charles River that is a Domestic Subsidiary guarantees any Indebtedness under
the New Credit Facility, then such Restricted Subsidiary shall become a
Guarantor and execute a supplemental indenture and deliver an opinion of
counsel, in accordance with the terms of the Indenture.

     Reports

     The indenture will provide that, whether or not required by the rules and
regulations of the SEC, so long as any notes are outstanding, Charles River will
furnish to the holders of notes:

     (1) all quarterly and annual financial information that would be required
to be contained in a filing with the SEC on Forms 10-Q and 10-K if Charles River
were required to file those Forms, including a "Management's Discussion and

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Analysis of Financial Condition and Results of Operations" and, with respect to
the annual information only, a report thereon by Charles River's certified
independent accountants; and

     (2) all current reports that would be required to be filed with the SEC on
Form 8-K if Charles River were required to file those reports, in each case,
within the time periods specified in the SEC's rules and regulations.

     In addition, following the consummation of the exchange offer contemplated
by the registration rights agreement, whether or not required by the rules and
regulations of the SEC, Charles River will file a copy of all that information
and reports referred to in clauses (1) and (2) above with the SEC for public
availability within the time periods specified in the SEC's rules and
regulations (unless the SEC will not accept such a filing) and make that
information available to securities analysts and prospective investors upon
request.

     In addition, Charles River has agreed that, for so long as any notes remain
outstanding, it will furnish to the holders and to securities analysts and
prospective investors, upon their request, the information required to be
delivered pursuant to Rule 144A(d)(4) under the Securities Act.

Events of Default and Remedies

     The indenture will provide that each of the following constitutes an Event
of Default:

     (1) default for 30 days in the payment when due of interest on, or
liquidated damages with respect to, the notes (whether or not prohibited by the
subordination provisions of the indenture);

     (2) default in payment when due of the principal of or premium, if any, on
the notes (whether or not prohibited by the subordination provisions of the
indenture);

     (3) failure by Charles River or any of its Restricted Subsidiaries for 30
days after receipt of notice from the trustee or holders of at least 25% in
principal amount of the notes then outstanding to comply with the provisions
described under the captions "Repurchase at the Option of Holders--Change of
Control," "--Asset Sales," "Certain Covenants--Restricted Payments,"
"--Incurrence of Indebtedness and Issuance of Preferred Stock" or "Merger,
Consolidation or Sale of Assets;"

     (4) failure by Charles River for 60 days after notice from the trustee or
the holders of at least 25% in principal amount of the notes then outstanding to
comply with any of its other agreements in the indenture or the notes;

     (5) default under any mortgage, indenture or instrument under which there
may be issued or by which there may be secured or evidenced any Indebtedness for
money borrowed by Charles River or any of its Restricted Subsidiaries (or the
payment of which is guaranteed by Charles River or any of its Restricted
Subsidiaries), whether that Indebtedness or guarantee now exists, or is created
after the date of the indenture, which default:

          (a) is caused by a failure to pay Indebtedness at its stated final
     maturity (after giving effect to any applicable grace period provided in
     that Indebtedness) (a "Payment Default"); or

          (b) results in the acceleration of that Indebtedness prior to its
     stated final maturity and, in each case, the principal amount of any such
     Indebtedness, together with the principal amount of any other such
     Indebtedness under which there has been a Payment Default or the maturity
     of which has been so accelerated, aggregates $10.0 million or more;

     (6) failure by Charles River or any of its Restricted Subsidiaries to pay
final judgments aggregating in excess of $10.0 million (net of any amounts with
respect to which a reputable and creditworthy insurance company has acknowledged
liability in writing), which judgments are not paid, discharged or stayed for a
period of 60 days;

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     (7) except as permitted by the indenture, any Guarantee shall be held in
any judicial proceeding to be unenforceable or invalid or shall cease for any
reason to be in full force and effect or any Guarantor, or any Person acting of
behalf of any Guarantor, shall deny or disaffirm its obligations under its
Guarantee; and

     (8) certain events of bankruptcy or insolvency with respect to Charles
River or any of its Restricted Subsidiaries that is a Significant Subsidiary.

     If any Event of Default (other than an Event of Default specified in clause
(8) above with respect to events of bankruptcy or insolvency with respect to
Charles River or any Restricted Subsidiary that is a Significant Subsidiary)
occurs and is continuing, the holders of at least 25% in principal amount of the
then outstanding notes may direct the trustee to declare all the notes to be due
and payable immediately. However, so long as any Indebtedness permitted to be
incurred pursuant to the New Credit Facility shall be outstanding, that
acceleration shall not be effective until the earlier of:

          (1) an acceleration of any such Indebtedness under the New Credit
     Facility; or

          (2) five business days after receipt by Charles River and the
     administrative agent under the New Credit Facility of written notice of
     that acceleration.

Except as stated in the prior sentence, upon any such declaration, the notes
shall become due and payable immediately.

     Notwithstanding the foregoing, in the case of an Event of Default specified
in clause (8) above with respect to events of bankruptcy or insolvency with
respect to Charles River or any Restricted Subsidiary that is a Significant
Subsidiary, all outstanding notes will become due and payable without further
action or notice. Holders of the notes may not enforce the indenture or the
notes except as provided in the indenture.

     The holders of a majority in aggregate principal amount of the then
outstanding notes by written notice to the trustee may on behalf of all of the
holders rescind an acceleration and its consequences if the rescission would not
conflict with any judgment or decree and if all existing Events of Default
(except nonpayment of principal, interest or premium or liquidated damages, if
any, that has become due solely because of the acceleration) have been cured or
waived, provided that, in the event of a declaration of acceleration of the
notes because an Event of Default has occurred and is continuing as a result of
the acceleration of any Indebtedness described in clause (5) above, the
declaration of acceleration of the notes shall be automatically annulled if the
holders of any Indebtedness described in that clause (5) have rescinded the
declaration of acceleration in respect of that Indebtedness within 30 days of
the date of that declaration and if:

          (1) the annulment of the acceleration of the notes would not conflict
     with any judgment or decree of a court of competent jurisdiction; and

          (2) all existing Events of Default, except non-payment of principal
     or interest on the notes that became due solely because of the
     acceleration of the notes, have been cured or waived.

     Subject to certain limitations, holders of a majority in principal amount
of the then outstanding notes may direct the trustee in its exercise of any
trust or power. The trustee may withhold from holders of the notes notice of any
continuing Default or Event of Default (except a Default or Event of Default
relating to the payment of principal or interest) if it determines that
withholding notice is in their interest.

     The holders of a majority in aggregate principal amount of the notes then
outstanding by notice to the trustee may on behalf of the holders of all of the
notes waive any existing Default or Event of Default and its consequences under
the indenture except a continuing Default or Event of Default in the payment of
interest on, or the principal of, the notes.

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     Charles River is required to deliver to the trustee annually a statement
regarding compliance with the indenture, and Charles River is required upon
becoming aware of any Default or Event of Default to deliver to the trustee a
statement specifying that Default or Event of Default.

No Personal Liability of Member, Directors, Officers, Employees and Stockholders

     No member, director, officer, employee, incorporator or stockholder of
Charles River, as such, shall have any liability for any obligations of Charles
River under the notes or the indenture or for any claim based on, in respect of,
or by reason of, those obligations or their creation. Each holder of notes by
accepting a note waives and releases all that liability. The waiver and release
are part of the consideration for issuance of the notes. That waiver may not be
effective to waive liabilities under the federal securities laws, and it is the
view of the SEC that such a waiver is against public policy.

Legal Defeasance and Covenant Defeasance

     Charles River may, at its option and at any time, elect to have all of its
obligations discharged with respect to the outstanding notes and the indenture
("Legal Defeasance") except for:

          (1) the rights of holders of outstanding notes to receive payments in
     respect of the principal of, premium, if any, and interest and liquidated
     damages, if any, on those notes when those payments are due from the trust
     referred to below;

          (2) Charles River's obligations with respect to the notes concerning
     issuing temporary notes, registration of notes, mutilated, destroyed, lost
     or stolen notes and the maintenance of an office or agency for payment and
     money for security payments held in trust;

          (3) the rights, powers, trusts, duties and immunities of the trustee,
     and Charles River's obligations in connection therewith; and

          (4) the Legal Defeasance provisions of the indenture.

     In addition, Charles River may, at its option and at any time, elect to
have its obligations released with respect to certain covenants that are
described in the indenture released ("Covenant Defeasance") and thereafter any
omission to comply with those obligations shall not constitute a Default or
Event of Default with respect to the notes. In the event Covenant Defeasance
occurs, certain events (not including non-payment with respect to the notes,
bankruptcy, receivership, rehabilitation and insolvency events) described under
"Events of Default and Remedies" will no longer constitute an Event of Default
with respect to the notes.

     In order to exercise either Legal Defeasance or Covenant Defeasance,

     (1) Charles River must irrevocably deposit with the trustee, in trust, for
the benefit of the holders of the notes, cash in United States dollars,
non-callable Government Securities, or a combination thereof, in those amounts
as will be sufficient, in the opinion of a nationally recognized firm of
independent public accountants, to pay the principal of, premium, if any, and
interest and liquidated damages, if any, on the outstanding notes on the stated
maturity or on the applicable redemption date, as the case may be, and Charles
River must specify whether the notes are being defeased to maturity or to a
particular redemption date;

     (2) in the case of Legal Defeasance, Charles River shall have delivered to
the trustee an opinion of counsel in the United States reasonably acceptable to
the trustee confirming that:

          (a) Charles River has received from, or there has been published by,
     the Internal Revenue Service a ruling; or

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          (b) since the date of the indenture, there has been a change in the
     applicable federal income tax law,

     in either case to the effect that, and based thereon that opinion of
     counsel shall confirm that, subject to customary assumptions and
     exclusions, the holders of the outstanding notes will not recognize income,
     gain or loss for federal income tax purposes as a result of that Legal
     Defeasance and will be subject to federal income tax on the same amounts,
     in the same manner and at the same times as would have been the case if
     that Legal Defeasance had not occurred;

     (3) in the case of Covenant Defeasance, Charles River shall have delivered
to the trustee an opinion of counsel in the United States reasonably acceptable
to the trustee confirming that, subject to customary assumptions and exclusions,
the holders of the outstanding notes will not recognize income, gain or loss for
federal income tax purposes as a result of that Covenant Defeasance and will be
subject to federal income tax on the same amounts, in the same manner and at the
same times as would have been the case if that Covenant Defeasance had not
occurred;

     (4) no Default or Event of Default shall have occurred and be continuing on
the date of that deposit (other than a Default or Event of Default resulting
from the borrowing of funds to be applied to that deposit) or, insofar as Events
of Default from bankruptcy or insolvency events are concerned, at any time in
the period ending on the 123rd day after the date of deposit;

     (5) that Legal Defeasance or Covenant Defeasance will not result in a
breach or violation of, or constitute a default under, any material agreement or
instrument (other than the indenture) to which Charles River or any of its
Subsidiaries is a party or by which Charles River or any of its Subsidiaries is
bound;

     (6) Charles River must have delivered to the trustee an opinion of counsel
to the effect that, subject to customary assumptions and exclusions, after the
123rd day following the deposit, the trust funds will not be subject to the
effect of Section 547 of the United States Bankruptcy Code or any analogous New
York State law provision or any other applicable federal or New York bankruptcy,
insolvency, reorganization or similar laws affecting creditors' rights
generally;

     (7) Charles River must deliver to the trustee an Officers' Certificate
stating that the deposit was not made by Charles River with the intent of
preferring the holders of notes over the other creditors of Charles River with
the intent of defeating, hindering, delaying or defrauding creditors of Charles
River or others; and

     (8) Charles River must deliver to the trustee an Officers' Certificate and
an opinion of counsel (which opinion may be subject to customary assumptions and
exclusions), each stating that all conditions precedent provided for relating to
the Legal Defeasance or the Covenant Defeasance have been complied with.

Transfer and Exchange

     A holder may transfer or exchange notes in accordance with the indenture.
The Registrar and the trustee may require a holder, among other things, to
furnish appropriate endorsements and transfer documents and Charles River may
require a holder to pay any taxes and fees required by law or permitted by the
indenture. Charles River is not required to transfer or exchange any note
selected for redemption. Also, Charles River is not required to transfer or
exchange any note for a period of 15 days before a selection of notes to be
redeemed. The registered holder of a note will be treated as the owner of it for
all purposes.

Amendment, Supplement and Waiver

     Except as provided below, the indenture and the notes may be amended or
supplemented with the consent of the holders of at least a majority in principal
amount of the notes then outstanding, and any existing default or compliance
with any provision of the indenture or the notes may be waived with the consent
of the holders of a majority in principal amount of the then outstanding notes.
Consents obtained in connection with a purchase of, or tender offer or exchange
offer for, notes shall be included for those purposes.

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     Without the consent of each holder affected, an amendment or waiver may
not, with respect to any notes held by a non-consenting holder:

          (1) reduce the principal amount of notes whose holders must consent
     to an amendment, supplement or waiver;

          (2) reduce the principal of or change the fixed maturity of any note
     or alter the provisions with respect to the redemption of the notes (other
     than the provisions described under the caption "--Repurchase at the
     Option of Holders");

          (3) reduce the rate of or extend the time for payment of interest on
     any note;

          (4) waive a Default or Event of Default in the payment of principal
     of or premium, if any, or interest or liquidated damages, if any, on the
     notes (except a rescission of acceleration of the notes by the holders of
     at least a majority in aggregate principal amount of the notes and a
     waiver of the payment default that resulted from that acceleration);

          (5) make any note payable in money other than that stated in the
     notes;

          (6) make any change in the provisions of the indenture relating to
     waivers of past Defaults;

          (7) waive a redemption payment with respect to any note (other than
     the provisions described under the caption "--Repurchase at the Option of
     Holders");

          (8) release any Guarantor from its obligations under its Guarantee or
     the indenture, except in accordance with the terms of the indenture; or

          (9) make any change in the foregoing amendment and waiver provisions.

Notwithstanding the foregoing, any

          (1) amendment to or waiver of the covenant described under the
     caption "--Repurchase at the Option of Holders--Change of Control;" and

          (2) amendment to Article 10 of the indenture (which relates to
     subordination) will require the consent of the holders of at least
     two-thirds in aggregate principal amount of the notes then outstanding if
     that amendment would materially adversely affect the rights of holders of
     notes.

Notwithstanding the foregoing, without the consent of any holder of notes,
Charles River, any Guarantor and the trustee may amend or supplement the
indenture, any Guarantee or the notes:

          (1) to cure any ambiguity, defect or inconsistency,

          (2) to provide for uncertificated notes in addition to or in place of
     certificated notes,

          (3) to provide for the assumption of Charles River's obligations to
     holders of notes in the case of a merger or consolidation or sale of all
     or substantially all of the assets of Charles River or to provide for the
     assumption of any Guarantor's obligations under its Guarantee in the case
     of a merger or consolidation of the Guarantor,

          (4) to make any change that would provide any additional rights or
     benefits to the holders of notes or that does not materially adversely
     affect the legal rights under the indenture of any such holder,

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          (5) to comply with requirements of the SEC in order to effect or
     maintain the qualification of the indenture under the Trust Indenture Act
     or

          (6) to provide for guarantees of the notes.

Concerning the Trustee

     The indenture contains certain limitations on the rights of the trustee,
should it become a creditor of Charles River, to obtain payment of claims in
certain cases, or to realize on certain property received in respect of any such
claim as security or otherwise. The trustee will be permitted to engage in other
transactions; however, if it acquires any conflicting interest it must eliminate
that conflict within 90 days, apply to the SEC for permission to continue or
resign.

     The holders of a majority in principal amount of the then outstanding notes
will have the right to direct the time, method and place of conducting any
proceeding for exercising any remedy available to the trustee, subject to
certain exceptions. The indenture provides that in case an Event of Default
shall occur (which shall not be cured), the trustee will be required, in the
exercise of its power, to use the degree of care of a prudent man in the conduct
of his own affairs. Subject to such provisions, the trustee will be under no
obligation to exercise any of its rights or powers under the indenture at the
request of any holder of notes, unless that holder shall have offered to the
trustee security and indemnity satisfactory to it against any loss, liability or
expense.

Additional Information

     Anyone who receives this prospectus may obtain a copy of the indenture and
registration rights agreement without charge by writing to Charles River at 251
Ballardvale Street, Wilmington, MA 01887, Attention: Secretary.

Book-Entry, Delivery and Form

     The certificates representing the new notes will be issued in fully
registered form, without coupons. Except as described below, the new notes will
be deposited with, or on behalf of, The Depository Trust Company, New York, New
York ("DTC"), and registered in the name of Cede & Co. as DTC's nominee, in the
form of a global note (the "global registered note").

     The Global Registered Note. Charles River expects that pursuant to
procedures established by DTC (a) upon deposit of the global registered note,
DTC or its custodian will credit on its internal system interests in the global
registered note to the accounts of persons who have accounts with DTC
("Participants") and (b) ownership of the global registered note will be shown
on, and the transfer of ownership thereof will be effected only through, records
maintained by DTC or its nominee, with respect to interests of Participants, and
the records of Participants with respect to interests of persons other than
Participants. Ownership of beneficial interests in the global registered note
will be limited to Participants or persons who hold interests through
Participants.

     So long as DTC or its nominee is the registered owner or holder of the new
notes, DTC or such nominee will be considered the sole owner or holder of the
new notes represented by the global registered note for all purposes under the
indenture. No beneficial owner of an interest in the global registered note will
be able to transfer such interest except in accordance with DTC's procedures, in
addition to those provided for under the indenture with respect to the new
notes.

     Payments of the principal of, or premium and interest on, the global
registered note will be made to DTC or its nominee, as the case may be, as the
registered owner thereof. None of Charles River, the trustee or any paying agent
under the indenture will have any responsibility or liability for any aspect of
the records relating to or payments made on account of beneficial ownership
interests in the global registered note or for maintaining, supervising or
reviewing any records relating to such beneficial ownership interest.

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     We expect that DTC or its nominee, upon receipt of any payment of the
principal of, or premium and interest on, the global registered note, will
credit Participants' accounts with payments in amounts proportionate to their
respective beneficial interests in the principal amount of such global
registered note as shown on the records of DTC or its nominee. We also expect
that payments by Participants to owners of beneficial interests in the global
registered note held through such Participants will be governed by standing
instructions and customary practice as is now the case with securities held for
the accounts of customers registered in the names of nominees for such
customers. Such payments will be the responsibility of such Participants.

     Transfers between Participants in DTC will be effected in accordance with
DTC rules and will be settled in immediately available funds. If a holder
requires physical delivery of a certificated note for any reason, including to
sell new notes to persons in states which require physical delivery of the new
notes or to pledge such securities, such holder must transfer its interest in
the global registered note in accordance with the normal procedures of DTC and
with the procedures set forth in the indenture.

     DTC has advised us that DTC will take any action permitted to be taken by a
holder of new notes, including the presentation of new notes for exchange as
described below, only at the direction of one or more Participants to whose
account at DTC interests in the global registered note are credited and only in
respect of such portion of the aggregate principal amount of new notes as to
which such Participant or Participants has or have given such direction.
However, if there is an Event of Default under the indenture, DTC will exchange
the global registered note for certificated new notes, which it will distribute
to its Participants.

     DTC has advised us as follows: DTC is a limited purpose trust company
organized under the laws of the State of New York, a member of the Federal
Reserve System, a "clearing corporation" within the meaning of the Uniform
Commercial Code and a "clearing agency" registered pursuant to the provisions of
Section 17A of the Exchange Act. DTC was created to hold securities for its
Participants and facilitate the clearance and settlement of securities
transactions between Participants through electronic book-entry changes in
accounts of its Participants, thereby eliminating the need for physical movement
of certificates. Participants include securities brokers and dealers, banks,
trust companies and clearing corporations and other organizations. Indirect
access to the DTC system is available to others such as banks, brokers, dealers
and trust companies that clear through or maintain a custodial relationship with
a Participant, either directly or indirectly ("Indirect Participants").

     Although DTC has agreed to the foregoing procedures in order to facilitate
transfers of interest in the global registered notes among Participants, it is
under no obligation to perform such procedures, and such procedures may be
discontinued at any time. Neither Charles River nor the trustee will have any
responsibility for the performance by DTC or its Participants or Indirect
Participants of their respective obligations under the rules and procedures
governing their operations.

     Certificated Notes. Interests in the global registered note will be
exchangeable or transferable, as the case may be, for certificated notes if

          (1) DTC (a) notifies us that it is unwilling or unable to continue as
     depositary for the global registered note and we fail to appoint a
     successor depositary or (b) has ceased to be a clearing agency registered
     under the Exchange Act,

          (2) We, at our option, notify the trustee in writing that we elect to
     cause the issuance of the new notes in certificated form or

          (3) there shall have occurred and be continuing to occur a Default or
     an Event of Default with respect to the new notes.

     In addition, beneficial interests in the global registered note may be
exchanged for certificated notes upon request but only upon at least 20 days'
prior written notice given to the trustee by or on behalf of DTC in accordance
with customary procedures. In all cases, certificated notes delivered in
exchange for the global registered note or beneficial

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interest therein will be registered in the names, and issued in any approved
denominations, requested by or on behalf of the depositary, in accordance with
its customary procedures.

Same Day Settlement And Payment

     The indenture will require that payments in respect of the new notes
represented by the global registered note, including principal, premium, if any,
interest and Liquidated Damages, if any, be made by wire transfer of immediately
available next day funds to the accounts specified by the holder. With respect
to certificated notes, Charles River will make all payments of principal,
premium, if any, interest and Liquidated Damages, if any, by wire transfer of
immediately available funds to the accounts specified by the holders thereof or,
if no such account is specified, by mailing a check to each such holder's
registered address. Charles River expects that secondary trading in certificated
notes will also be settled in immediately available funds.

Certain Definitions

     Set forth below are certain defined terms used in the indenture. Reference
is made to the indenture for a full disclosure of all those terms, as well as
any other capitalized terms used herein for which no definition is provided.

     "Accounts Receivable Subsidiary" means an Unrestricted Subsidiary of
Charles River to which Charles River or any of its Restricted Subsidiaries sells
any of its accounts receivable pursuant to a Receivables Facility.

     "Acquired Indebtedness" means, with respect to any specified Person,

          (1) Indebtedness of any other Person existing at the time that other
     Person is merged with or into or became a Subsidiary of that specified
     Person, including, without limitation, Indebtedness incurred in connection
     with, or in contemplation of, that other Person merging with or into or
     becoming a Subsidiary of that specified Person; and

          (2) Indebtedness secured by a Lien encumbering an asset acquired by
     that specified Person at the time that asset is acquired by that specified
     Person.

     "Affiliate" of any specified Person means any other Person which, directly
or indirectly, controls, is controlled by or is under direct or indirect common
control with, that specified Person. For purposes of this definition, "control,"
when used with respect to any Person, means the power to direct the management
and policies of that Person, directly or indirectly, whether through the
ownership of voting securities, by contract or otherwise, and the terms
"controlling" and "controlled" have meanings correlative to the foregoing.

     "Asset Sale" means:

          (1) the sale, lease, conveyance, disposition or other transfer (a
     "disposition") of any properties, assets or rights (including, without
     limitation, by way of a sale and leaseback); provided that the sale,
     lease, conveyance or other disposition of all or substantially all of the
     assets of Charles River and its Subsidiaries taken as a whole will be
     governed by the provisions of the indenture described under the caption
     "--Change of Control" and/or the provisions described under the caption
     "--Merger, Consolidation or Sale of Assets" and not by the provisions of
     the Asset Sale covenant; and

          (2) the issuance, sale or transfer by Charles River or any of its
     Restricted Subsidiaries of Equity Interests of any of Charles River's
     Restricted Subsidiaries,

     in the case of either clause (1) or (2), whether in a single transaction
     or a series of related transactions,

               (a) that have a fair market value in excess of $5.0 million; or

               (b) for net proceeds in excess of $5.0 million.

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     Notwithstanding the foregoing, the following items shall not be deemed to
be Asset Sales:

          (1) dispositions in the ordinary course of business;

          (2) a disposition of assets by Charles River to a Restricted
     Subsidiary or by a Restricted Subsidiary to Charles River or to another
     Restricted Subsidiary;

          (3) a disposition of Equity Interests by a Restricted Subsidiary to
     Charles River or to another Restricted Subsidiary;

          (4) the sale and leaseback of any assets within 90 days of the
     acquisition thereof;

          (5) foreclosures on assets;

          (6) any exchange of like property pursuant to Section 1031 of the
     Internal Revenue Code of 1986, as amended, for use in a Permitted
     Business;

          (7) any sale of Equity Interests in, or Indebtedness or other
     securities of, an Unrestricted Subsidiary;

          (8) a Permitted Investment or a Restricted Payment that is permitted
     by the covenant described under the caption "--Restricted Payments"; and

          (9) sales of accounts receivable, or participations therein, in
     connection with any Receivables Facility.

     "Attributable Indebtedness" in respect of a sale and leaseback transaction
means, at the time of determination, the present value (discounted at the rate
of interest implicit in that transaction, determined in accordance with GAAP) of
the obligation of the lessee for net rental payments during the remaining term
of the lease included in that sale and leaseback transaction, including any
period for which that lease has been extended or may, at the option of the
lessor, be extended.

     "Capital Expenditure Indebtedness" means Indebtedness incurred by any
Person to finance the purchase or construction or any property or assets
acquired or constructed by that Person which have a useful life or more than one
year so long as:

          (1) the purchase or construction price for that property or assets is
     included in "addition to property, plant or equipment" in accordance with
     GAAP;

          (2) the acquisition or construction of that property or assets is not
     part of any acquisition of a Person or line of business; and

          (3) that Indebtedness is incurred within 90 days of the acquisition
     or completion of construction of that property or assets.

     "Capital Lease Obligation" means, at the time any determination thereof is
to be made, the amount of the liability in respect of a capital lease that would
at that time be required to be capitalized on a balance sheet in accordance with
GAAP.

     "Capital Stock" means:

          (1) in the case of a corporation, corporate stock;

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          (2) in the case of an association or business entity, any and all
     shares, interests, participations, rights or other equivalents (however
     designated) of corporate stock;

          (3) in the case of a partnership or limited liability company,
     partnership or membership interests (whether general or limited); and

          (4) any other interest or participation that confers on a Person the
     right to receive a share of the profits and losses of, or distributions of
     assets of, the issuing Person.

     "Cash Equivalents" means;

          (1) Government Securities;

          (2) any certificate of deposit maturing not more than 365 days after
     the date of acquisition issued by, or demand deposit or time deposit of,
     an Eligible Institution or any lender under the New Credit Facility;

          (3) commercial paper maturing not more than 365 days after the date
     of acquisition of an issuer (other than an Affiliate of Charles River)
     with a rating, at the time as of which any investment therein is made, of
     "A-3" (or higher) according to S&P or "P-2" (or higher) according to
     Moody's or carrying an equivalent rating by a nationally recognized rating
     agency if both of the two named rating agencies cease publishing ratings
     of investments;

          (4) any bankers acceptances of money market deposit accounts issued
     by an Eligible Institution;

          (5) any fund investing exclusively in investments of the types
     described in clauses (1) through (4) above; and

          (6) in the case of any Subsidiary organized or having its principal
     place of business outside the United States, investments denominated in
     the currency of the jurisdiction in which that Subsidiary is organized or
     has its principal place of business which are similar to the items
     specified in clauses (1) through (5) above, including without limitation
     any deposit with a bank that is a lender to any Restricted Subsidiary.

     "Consolidated Cash Flow" means, with respect to any Person for any period,
the Consolidated Net Income of that Person and its Restricted Subsidiaries for
that period plus, to the extent deducted in computing Consolidated Net Income,

          (1) provision for taxes based on income or profits of that Person and
     its Restricted Subsidiaries for that period;

          (2) Fixed Charges of that Person for that period;

          (3) depreciation, amortization (including amortization of goodwill
     and other intangibles) and all other non-cash charges, but excluding any
     other non-cash charge to the extent that it represents an accrual of or
     reserve for cash expenses in any future period or amortization of a
     prepaid cash expense that was paid in a prior period, of that Person and
     its Restricted Subsidiaries for that period;

          (4) net periodic post-retirement benefits;

          (5) other income or expense net as set forth on the face of that
     Person's statement of operations;

          (6) expenses and charges of Charles River related to the
     Transactions, including any purchase price adjustment or any other
     payments made pursuant to or as contemplated in the Transaction Agreements
     or the financial advisory agreements with DLJ Securities Corporation
     described under "Certain Relationships and Related

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     Party Transactions," and Transaction Financing, the New Credit Facility
     and the application of the proceeds thereof; and

          (7) any non-capitalized transaction costs incurred in connection with
     actual, proposed or abandoned financings, acquisitions or divestitures,
     including, but not limited to, financing and refinancing fees and costs
     incurred in connection with the Transactions and Transaction Financing,

in each case, on a consolidated basis and determined in accordance with GAAP.

     Notwithstanding the foregoing, the provision for taxes based on the income
or profits of, the Fixed Charges of, and the depreciation and amortization and
other non-cash charges of, a Restricted Subsidiary of a Person shall be added to
Consolidated Net Income to compute Consolidated Cash Flow only to the extent and
in the same proportion that Net Income of that Restricted Subsidiary was
included in calculating the Consolidated Net Income of that Person.

     "Consolidated Interest Expense" means, with respect to any Person for any
period, the sum of, without duplication,

          (1) the interest expense of that Person and its Restricted
     Subsidiaries for that period, on a consolidated basis, determined in
     accordance with GAAP, including amortization of original issue discount,
     non-cash interest payments, the interest component of all payments
     associated with Capital Lease Obligations, imputed interest with respect
     to Attributable Indebtedness, commissions, discounts and other fees and
     charges incurred in respect of letter of credit or bankers' acceptance
     financings, and net payments, if any, pursuant to Hedging Obligations;
     provided that in no event shall any amortization of deferred financing
     costs be included in Consolidated Interest Expense; and

          (2) the consolidated capitalized interest of that Person and its
     Restricted Subsidiaries for that period, whether paid or accrued;
     provided, however, that Receivables Fees shall be deemed not to constitute
     Consolidated Interest Expense.

     "Consolidated Net Debt" means, with respect to any Person as of any date of
determination, the aggregate principal amount of Indebtedness for borrowed money
of such Person and its Restricted Subsidiaries as of such date, less the
aggregate amount of cash and Cash Equivalents of such Person and its Restricted
Subsidiaries, in each case determined on a consolidated basis in accordance with
GAAP.

     Notwithstanding the foregoing, the Consolidated Interest Expense with
respect to any Restricted Subsidiary that is not a Wholly Owned Restricted
Subsidiary shall be included only to the extent and in the same proportion that
the net income of that Restricted Subsidiary was included in calculating
Consolidated Net Income.

     "Consolidated Net Income" means, with respect to any Person for any period,
the aggregate of the Net Income of that Person and its Restricted Subsidiaries
for that period, on a consolidated basis, determined in accordance with GAAP;
provided that

          (1) the Net Income (or loss) of any Person that is not a Restricted
     Subsidiary or that is accounted for by the equity method of accounting
     shall be included only to the extent of the amount of dividends or
     distributions paid in cash to the referent Person or a Restricted
     Subsidiary thereof;

          (2) the Net Income (or loss) of any Restricted Subsidiary other than
     a Subsidiary organized or having its principal place of business outside
     the United States shall be excluded to the extent that the declaration or
     payment of dividends or similar distributions by that Restricted
     Subsidiary of that Net Income (or loss) is not at the date of
     determination permitted without any prior governmental approval (that has
     not been obtained) or, directly or indirectly, by operation of the terms
     of its charter or any agreement, instrument, judgment, decree, order,
     statute, rule or governmental regulation applicable to that Restricted
     Subsidiary;

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          (3) the Net Income (or loss) of any Person acquired in a pooling of
     interests transaction for any period prior to the date of that acquisition
     shall be excluded; and

          (4) the cumulative effect of a change in accounting principles shall
     be excluded.

     "Default" means any event that is or with the passage of time or the giving
of notice or both would be an Event of Default.

     "Designated Noncash Consideration" means the fair market value of non-cash
consideration received by Charles River or one of its Restricted Subsidiaries in
connection with an Asset Sale that is so designated as Designated Noncash
Consideration pursuant to an Officers' Certificate, setting forth the basis of
that valuation, executed by the principal executive officer and the principal
financial officer of Charles River, less the amount of cash or Cash Equivalents
received in connection with a sale of that Designated Noncash Consideration.

     "Disqualified Stock" means any Capital Stock that, by its terms (or by the
terms of any security into which it is convertible, or for which it is
exchangeable), or upon the happening of any event (other than any event solely
within the control of the issuer thereof), matures or is mandatorily redeemable,
pursuant to a sinking fund obligation or otherwise, is exchangeable for
Indebtedness (except to the extent exchangeable at the option of that Person
subject to the terms of any debt instrument to which that Person is a party) or
redeemable at the option of the holder thereof, in whole or in part, on or prior
to the date on which the notes mature; provided that any Capital Stock that
would constitute Disqualified Stock solely because the holders thereof have the
right to require Charles River to repurchase that Capital Stock upon the
occurrence of a Change of Control or an Asset Sale shall not constitute
Disqualified Stock if the terms of that Capital Stock provide that Charles River
may not repurchase or redeem any such Capital Stock pursuant to those provisions
unless that repurchase or redemption complies with the covenant described under
the caption "--Certain Covenants--Restricted Payments," and provided further
that, if that Capital Stock is issued to any plan for the benefit of employees
of Charles River or its Subsidiaries or by any such plan to those employees,
that Capital Stock shall not constitute Disqualified Stock solely because it may
be required to be repurchased by Charles River in order to satisfy applicable
statutory or regulatory obligations.

     "DLJ Merchant Banking Funds" means DLJ Merchant Banking Partners II, L.P.
and its Affiliates.

     "Domestic Subsidiary" means a Subsidiary that is organized under the laws
of the United States or any State, district or territory thereof.

     "Eligible Institution" means a commercial banking institution that has
combined capital and surplus not less than $100.0 million or its equivalent in
foreign currency, whose short-term debt is rated "A-3" or higher according to
Standard & Poor's Ratings Group ("S&P") or "P-2" or higher according to Moody's
Investor Services, Inc. ("Moody's") or carrying an equivalent rating by a
nationally recognized rating agency if both of the two named rating agencies
cease publishing ratings of investments.

     "Equity Interests" means Capital Stock and all warrants, options or other
rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).

     "Existing Indebtedness" means Indebtedness of Charles River and its
Restricted Subsidiaries (other than Indebtedness under the New Credit Facility)
in existence on the date of the indenture, until those amounts are repaid.

     "Fixed Charges" means, with respect to any Person for any period, the sum,
without duplication, of,

          (1) the Consolidated Interest Expense of that Person for that period;
     and

          (2) all dividend payments on any series of preferred stock of that
     Person (other than dividends payable solely in Equity Interests that are
     not Disqualified Stock),

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<PAGE>



in each case, on a consolidated basis and in accordance with GAAP.

     "Fixed Charge Coverage Ratio" means, with respect to any Person for any
period, the ratio of the Consolidated Cash Flow of that Person for that period
(exclusive of amounts attributable to discontinued operations, as determined in
accordance with GAAP, or operations and businesses disposed of prior to the
Calculation Date (as defined)) to the Fixed Charges of that Person for that
period (exclusive of amounts attributable to discontinued operations, as
determined in accordance with GAAP, or operations and businesses disposed of
prior to the Calculation Date).

     In the event that the referent Person or any of its Subsidiaries incurs,
assumes, guarantees or redeems any Indebtedness (other than revolving credit
borrowings) or issues or redeems preferred stock subsequent to the commencement
of the period for which the Fixed Charge Coverage Ratio is being calculated but
prior to the date on which the event for which the calculation of the Fixed
Charge Coverage Ratio is made (the "Calculation Date"), then the Fixed Charge
Coverage Ratio shall be calculated giving pro forma effect to that incurrence,
assumption, guarantee or redemption of Indebtedness, or that issuance or
redemption of preferred stock and the use of the proceeds therefrom, as if the
same had occurred at the beginning of the applicable four-quarter reference
period.

     In addition, for purposes of making the computation referred to above, the
Recapitalization and acquisitions that have been made by Charles River or any of
its Subsidiaries, including all mergers or consolidations and any related
financing transactions, during the four-quarter reference period or subsequent
to that reference period and on or prior to the Calculation Date shall be deemed
to have occurred on the first day of the four-quarter reference period and
Consolidated Cash Flow for that reference period shall be calculated to include
the Consolidated Cash Flow of the acquired entities on a pro forma basis after
giving effect to cost savings reasonably expected to be realized in connection
with that acquisition, as determined in good faith by an officer of Charles
River (regardless of whether those cost savings could then be reflected in pro
forma financial statements under GAAP, Regulation S-X promulgated by the SEC or
any other regulation or policy of the SEC) and without giving effect to clause
(3) of the proviso set forth in the definition of Consolidated Net Income.

     "Foreign Credit Facilities" means any Indebtedness of a Restricted
Subsidiary organized or having its principal place of business outside the
United States. Indebtedness under the Foreign Credit Facilities outstanding on
the date on which the notes are first issued and authenticated under the
indenture shall be deemed to have been incurred on that date in reliance on the
first paragraph of the covenant described under the caption "--Certain
Covenants--Incurrence of Indebtedness and Issuance of Preferred Stock."

     "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as have been approved by a significant segment of the accounting
profession, which are in effect on the date of the indenture.

     "guarantee" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, letters of credit or
reimbursement agreements in respect thereof), of all or any part of any
Indebtedness.

     "Guarantor" means any Subsidiary that executes a Note Guarantee in
accordance with the provisions of the indenture.

     "Hedging Obligations" means, with respect to any Person, the obligations of
that Person under (a) interest rate swap agreements, interest rate cap
agreements and interest rate collar agreements and (b) other agreements or
arrangements designed to protect that Person against fluctuations in interest
rates.

     "Indebtedness" means, with respect to any Person, any indebtedness of that
Person in respect of borrowed money or evidenced by bonds, notes, debentures or
similar instruments or letters of credit (or reimbursement agreements in respect
thereof) or banker's acceptances or representing Capital Lease Obligations or
the balance deferred and unpaid of the purchase price of any property or
representing any Hedging Obligations, except any such balance that constitutes
an

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accrued expense, trade payable or customer contract advances, if and to the
extent any of the foregoing Indebtedness (other than letters of credit and
Hedging Obligations) would appear as a liability upon a balance sheet of that
Person prepared in accordance with GAAP, as well as all Indebtedness of others
secured by a Lien on any asset of that Person (whether or not that Indebtedness
is assumed by that Person) and, to the extent not otherwise included, the
guarantee by that Person of any Indebtedness of any other Person, provided that
Indebtedness shall not include the pledge by Charles River of the Capital Stock
of an Unrestricted Subsidiary of Charles River to secure Non-Recourse Debt of
that Unrestricted Subsidiary.

     The amount of any Indebtedness outstanding as of any date shall be:

          (1) the accreted value thereof, in the case of any Indebtedness that
     does not require current payments of interest; and

          (2) the principal amount thereof (together with any interest thereon
     that is more than 30 days past due), in the case of any other Indebtedness
     provided that the principal amount of any Indebtedness that is denominated
     in any currency other than United States dollars shall be the amount
     thereof, as determined pursuant to the foregoing provision, converted into
     United States dollars at the Spot Rate in effect on the date that
     Indebtedness was incurred or, if that indebtedness was incurred prior to
     the date of the indenture, the Spot Rate in effect on the date of the
     indenture.

     "Investments" means, with respect to any Person, all investments by that
Person in other Persons, including Affiliates, in the forms of direct or
indirect loans (including guarantees by the referent Person of, and Liens on any
assets of the referent Person securing, Indebtedness or other obligations of
other Persons), advances or capital contributions (excluding commission, travel
and similar advances to officers and employees made in the ordinary course of
business), purchases or other acquisitions for consideration of Indebtedness,
Equity Interests or other securities, together with all items that are or would
be classified as investments on a balance sheet prepared in accordance with
GAAP, provided that an investment by Charles River for consideration consisting
of common equity securities of Charles River shall not be deemed to be an
Investment other than for purposes of clause (3) of the definition of "Qualified
Proceeds."

     If Charles River or any Restricted Subsidiary of Charles River sells or
otherwise disposes of any Equity Interests of any direct or indirect Restricted
Subsidiary of Charles River such that, after giving effect to any such sale or
disposition, that Person is no longer a Subsidiary of Charles River, Charles
River shall be deemed to have made an Investment on the date of any such sale or
disposition equal to the fair market value of the Equity Interests of that
Restricted Subsidiary not sold or disposed of in an amount determined as
provided in the final paragraph of the covenant described under the caption
"--Restricted Payments."

     "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of that asset,
whether or not filed, recorded or otherwise perfected under applicable law,
including any conditional sale or other title retention agreement, any lease in
the nature thereof, any option or other agreement to sell or give a security
interest in and any filing of or agreement to give any financing statement under
the Uniform Commercial Code (or equivalent statutes) of any jurisdiction.

     "Management Loans" means one or more loans by Charles River or Parent to
officers and/or directors of Charles River and any of its Restricted
Subsidiaries to finance the purchase by such officers and directors of common
stock of Parent or Charles River or membership interests in CRL Acquisition LLC;
provided that the aggregate principal amount of all such Management Loans
outstanding at any time shall not exceed $1.5 million.

     "Net Income" means, with respect to any Person, the net income (loss) of
that Person, determined in accordance with GAAP and before any reduction in
respect of preferred stock dividends, excluding, however:

          (1) any gain (or loss), together with any related provision for taxes
     on that gain (or loss), realized in connection with:

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               (a) any Asset Sale, including, without limitation, dispositions
          pursuant to sale and leaseback transactions; or

               (b) the extinguishment of any Indebtedness of that Person or any
          of its Restricted Subsidiaries; and

          (2) any extraordinary or nonrecurring gain (or loss), together with
     any related provision for taxes on that extraordinary or nonrecurring gain
     (or loss).

     "Net Proceeds" means the aggregate cash proceeds received by Charles River
or any of its Restricted Subsidiaries in respect of any Asset Sale (including,
without limitation, any cash received upon the sale or other disposition of any
non-cash consideration received in any Asset Sale), net of, without duplication,

          (1) the direct costs relating to that Asset Sale, including, without
     limitation, legal, accounting and investment banking fees, and sales
     commissions, recording fees, title transfer fees and appraiser fees and
     cost of preparation of assets for sale, and any relocation expenses
     incurred as a result thereof;

          (2) taxes paid or payable as a result thereof (after taking into
     account any available tax credits or deductions and any tax sharing
     arrangements);

          (3) amounts required to be applied to the repayment of Indebtedness
     (other than revolving credit Indebtedness incurred pursuant to the New
     Credit Facility) secured by a Lien on the asset or assets that were the
     subject of that Asset Sale; and

          (4) any reserve established in accordance with GAAP or any amount
     placed in escrow, in either case for adjustment in respect of the sale
     price of such asset or assets until such time as that reserve is reversed
     or that escrow arrangement is terminated, in which case Net Proceeds shall
     include only the amount of the reserve so reversed or the amount returned
     to Charles River or its Restricted Subsidiaries from that escrow
     arrangement, as the case may be.

     "New Credit Facility" means that certain Credit Agreement, dated as of
September 29, 1999 among Charles River, certain subsidiaries of Charles River
from time to time party thereto as guarantors, various financial institutions
party thereto, and DLJ Capital Funding, Inc., as syndication agent and
administrative agent, including any related notes, guarantees, letters of credit
collateral documents, rate protection or hedging arrangement, instruments and
agreements executed in connection therewith, and, in each case, as amended,
modified, renewed, refunded, replaced or refinanced from time to time, including
any agreement:

          (1) extending or shortening the maturity of any Indebtedness incurred
     thereunder or contemplated thereby;

          (2) adding or deleting borrowers or guarantors thereunder;

          (3) increasing the amount of Indebtedness incurred thereunder or
     available to be borrowed thereunder, provided that on the date that
     Indebtedness is incurred it would not be prohibited by clause (1) of the
     second paragraph of the covenant described under the caption "--Incurrence
     of Indebtedness and Issuance of Preferred Stock"; or

          (4) otherwise altering the terms and conditions thereof.

     Indebtedness under the New Credit Facility outstanding on the date on which
notes are first issued and authenticated under the indenture shall be deemed to
have been incurred on that date in reliance on the first paragraph of the
covenant described under the caption "--Certain Covenants--Incurrence of
Indebtedness and Issuance of Preferred Stock."

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     "Non-Recourse Debt" means Indebtedness,

          (1) no default with respect to, which (including any rights that the
     holders thereof may have to take enforcement action against an
     Unrestricted Subsidiary) would permit (upon notice, lapse of time or both)
     any holder of any other Indebtedness of Charles River or any of its
     Restricted Subsidiaries to declare a default on such other Indebtedness or
     cause the payment thereof to be accelerated or payable prior to its stated
     maturity; and

          (2) as to which the lenders have been notified in writing that they
     will not have any recourse to the stock (other than the stock of an
     Unrestricted Subsidiary pledged by Charles River to secure debt of that
     Unrestricted Subsidiary) or assets of Charles River or any of its
     Restricted Subsidiaries;

provided that in no event shall Indebtedness of any Unrestricted Subsidiary fail
to be Non-Recourse Debt solely as a result of any default provisions contained
in a guarantee thereof by Charles River or any of its Restricted Subsidiaries if
Charles River or that Restricted Subsidiary was otherwise permitted to incur
that guarantee pursuant to the indenture.

     "Obligations" means any principal, interest, penalties, fees,
indemnifications, reimbursements, damages and other liabilities payable under
the documentation governing any Indebtedness.

     "Offering" means the offering of the units by Charles River.

     "Parent" means Charles River Laboratories Holdings Inc., the corporate
parent of Charles River, or its successors.

     "Pari Passu Indebtedness" means Indebtedness of Charles River that ranks
pari passu in right of payment to the notes.

     "Permitted Business" means any person engaged, directly or indirectly, in
the animal research or biomedical products and services business or any business
reasonably related, incidental or ancillary thereto.

     "Permitted Investments" means:

          (1) any Investment in Charles River or in a Restricted Subsidiary of
     Charles River;

          (2) any Investment in cash or Cash Equivalents;

          (3) any Investment by Charles River or any Restricted Subsidiary of
     Charles River in a Person, if as a result of that Investment,

               (a) that Person becomes a Restricted Subsidiary of Charles
          River; or

               (b) that Person is merged, consolidated or amalgamated with or
          into, or transfers or conveys substantially all of its assets to, or
          is liquidated into, Charles River or a Wholly Owned Restricted
          Subsidiary of Charles River;

          (4) any Investment made as a result of the receipt of non-cash
     consideration from an Asset Sale that was made pursuant to and in
     compliance with the covenant described under the caption "--Repurchase at
     the Option of Holders--Asset Sales";

          (5) any Investment acquired solely in exchange for Equity Interests
     (other than Disqualified Stock) of Charles River;

          (6) any Investment in a Person engaged in a Permitted Business (other
     than an Investment in an Unrestricted Subsidiary) having an aggregate fair
     market value, taken together with all other Investments made pursuant to
     this clause (6) that are at that time outstanding, not to exceed 15% of
     Total Assets at the time of that

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     Investment (with the fair market value of each Investment being measured
     at the time made and without giving effect to subsequent changes in
     value);

          (7) Investments relating to any special purpose Wholly Owned
     Subsidiary of Charles River organized in connection with a Receivables
     Facility that, in the good faith determination of the board of directors
     of Charles River, are necessary or advisable to effect that Receivables
     Facility;

          (8) the Management Loans or Investments in Parent to fund Management
     Loans; and

          (9) Hedging Obligations permitted to be incurred under "--Certain
     Covenants--Incurrence of Indebtedness and Issuance of Preferred Stock."

     "Permitted Liens" means:

          (1) Liens on property of a Person existing at the time that Person is
     merged into or consolidated with Charles River or any Restricted
     Subsidiary, provided that those Liens were not incurred in contemplation
     of that merger or consolidation and do not secure any property or assets
     of Charles River or any Restricted Subsidiary other than the property or
     assets subject to the Liens prior to that merger or consolidation;

          (2) Liens existing on the date of the indenture;

          (3) Liens securing Indebtedness consisting of Capitalized Lease
     Obligations, purchase money Indebtedness, mortgage financings, industrial
     revenue bonds or other monetary obligations, in each case incurred solely
     for the purpose of financing all or any part of the purchase price or cost
     of construction or installation of assets used in the business of Charles
     River or its Restricted Subsidiaries, or repairs, additions or
     improvements to those assets, provided that:

               (a) those Liens secure Indebtedness in an amount not in excess
          of the original purchase price or the original cost of any such
          assets or repair, additional or improvement thereto (plus an amount
          equal to the reasonable fees and expenses in connection with the
          incurrence of that Indebtedness);

               (b) those Liens do not extend to any other assets of Charles
          River or its Restricted Subsidiaries (and, in the case of repair,
          addition or improvements to any such assets, that Lien extends only
          to the assets (and improvements thereto or thereon) repaired, added
          to or improved);

               (c) the Incurrence of that Indebtedness is permitted by
          "--Certain Covenants--Incurrence of Indebtedness and Issuance of
          Preferred Stock;" and

               (d) those Liens attach within 365 days of that purchase,
          construction, installation, repair, addition or improvement;

          (4) Liens to secure any refinancings, renewals, extensions,
     modification or replacements (collectively, "refinancing") (or successive
     refinancings), in whole or in part, of any Indebtedness secured by Liens
     referred to in the clauses above so long as that Lien does not extend to
     any other property (other than improvements thereto);

          (5) Liens securing letters of credit entered into in the ordinary
     course of business and consistent with past business practice;

          (6) Liens on and pledges of the capital stock of any Unrestricted
     Subsidiary securing Non-Recourse Debt of that Unrestricted Subsidiary;

          (7) Liens securing (a) Indebtedness (including all Obligations) under
     the New Credit Facility or any Foreign Credit Facility (b) Hedging
     Obligations payable to a lender under the New Credit Facility or an
     Affiliate

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     thereof or to a Person that was a lender of Affiliate thereof at the time
     the contract was entered into to the extent such Hedging Obligations are
     secured by Liens on assets also securing Indebtedness (including all
     Obligations) under the New Credit Facility; and

          (8) other Liens securing Indebtedness that is permitted by the terms
     of the indenture to be outstanding having an aggregate principal amount at
     any one time outstanding not to exceed $50.0 million.

     "Permitted Refinancing Indebtedness" means any Indebtedness of Charles
River or any of its Restricted Subsidiaries issued within 60 days after
repayment of, in exchange for, or the net proceeds of which are used to extend,
refinance, renew, replace, defease or refund other Indebtedness of Charles River
or any of its Restricted Subsidiaries; provided that:

          (1) the principal amount (or accreted value, if applicable) of that
     Permitted Refinancing Indebtedness does not exceed the principal amount of
     (or accreted value, if applicable), plus premium, if any, and accrued
     interest on the Indebtedness so extended, refinanced, renewed, replaced,
     defeased or refunded (plus the amount of reasonable expenses incurred in
     connection therewith);

          (2) that Permitted Refinancing Indebtedness has a final maturity date
     no earlier than the final maturity date of, and has a Weighted Average
     Life to Maturity equal to or greater than the Weighted Average Life to
     Maturity of, the Indebtedness being extended, refinanced, renewed,
     replaced, defeased or refunded; and

          (3) if the Indebtedness being extended, refinanced, renewed,
     replaced, defeased or refunded is subordinated in right of payment to the
     notes, that Permitted Refinancing Indebtedness is subordinated in right of
     payment to, the notes on terms at least as favorable, taken as a whole, to
     the holders of notes as those contained in the documentation governing the
     Indebtedness being extended, refinanced, renewed, replaced, defeased or
     refunded.

     "Principals" means the DLJ Merchant Banking Funds.

     "Public Equity Offering" means

     o    any issuance of common stock by Charles River, other than to Parent
          and other than Disqualified Stock

     o    any issuance of common stock or preferred stock by Parent, other than
          Disqualified Stock

that is registered pursuant to the Securities Act, other than issuances
registered on Form S-8 and issuances registered on Form S-4, excluding issuances
of common stock pursuant to employee benefit plans of Parent or Charles River or
otherwise as compensation to employees of Parent or Charles River.

     "Qualified Proceeds" means any of the following or any combination of the
following:

          (1) cash;

          (2) Cash Equivalents;

          (3) assets (other than Investments) that are used or useful in a
     Permitted Business; and

          (4) the Capital Stock of any Person engaged in a Permitted Business
     if, in connection with the receipt by Charles River or any Restricted
     Subsidiary of Charles River of that Capital Stock,

               (a) that Person becomes a Restricted Subsidiary of Charles River
          or any Restricted Subsidiary of Charles River; or

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               (b) that Person is merged, consolidated or amalgamated with or
          into, or transfers or conveys substantially all of its assets to, or
          is liquidated into, Charles River or any Restricted Subsidiary of
          Charles River.

     "Ratio of Consolidated Net Debt to Consolidated Cash Flow" means, with
respect to any Person as of any date of determination, the ratio of (x) the
Consolidated Net Debt of such Person as of such date of determination (exclusive
of amounts attributable to discontinued operations, as determined in accordance
with GAAP, or operations and businesses disposed of prior to the date of
determination) to the (y) the Consolidated Cash Flow of such Person for the four
full fiscal quarters ending on or immediately preceding such date of
determination (exclusive of amounts attributable to discontinued operations, as
determined in accordance with GAAP, or operations and businesses disposed of
prior to the date of determination).

     In the event that the referent Person or any of its Subsidiaries incurs,
assumes, guarantees or redeems any Indebtedness (other than revolving credit
borrowings) or issues or redeems preferred stock subsequent to the commencement
of the period for which the Ratio of Consolidated Net Debt to Consolidated Cash
Flow is being calculated but prior to the date of determination, then the Ratio
of Consolidated Net Debt to Consolidated Cash Flow shall be calculated giving
pro forma effect to that incurrence, assumption, guarantee or redemption of
Indebtedness, or that issuance or redemption of preferred stock and the use of
the proceeds therefrom, as if the same had occurred at the beginning of the
applicable four-quarter reference period.

     In addition, for purposes of making the computation referred to above, the
Recapitalization and acquisitions that have been made by Charles River or any of
its Subsidiaries, including all mergers or consolidations and any related
financing transactions, during the four-quarter reference period shall be deemed
to have occurred on the first day of the four-quarter reference period and
Consolidated Cash Flow for that reference period shall be calculated to include
the Consolidated Cash Flow of the acquired entities on a pro forma basis after
giving effect to cost savings reasonably expected to be realized in connection
with that acquisition, as determined in good faith by an officer of Charles
River (regardless of whether those cost savings could then be reflected in pro
forma financial statements under GAAP, Regulation S-X promulgated by the SEC or
any other regulation or policy of the SEC) and without giving effect to clause
(3) of the proviso set forth in the definition of Consolidated Net Income.

     "Recapitalization" means the recapitalization of Charles River by the
Principals and their Related Parties pursuant to the terms of the
Recapitalization Agreement.

     "Recapitalization Agreement" means that certain Recapitalization Agreement
dated as of July 25, 1999 among Charles River, B&L, Parent, Charles River
Laboratories, Inc., Charles River SPAFAS, Inc., Bausch & Lomb International,
Inc., Wilmington Partners, L.P., Bausch & Lomb Canada, Inc., CRL Acquisition LLC
and DLJ Merchant Banking Partners II, L.P.

     "Receivables Facility" means one or more receivables financing facilities,
as amended from time to time, pursuant to which Charles River or any of its
Restricted Subsidiaries sells its accounts receivable to an Accounts Receivable
Subsidiary.

     "Receivables Fees" means distributions or payments made directly or by
means of discounts with respect to any participation interests issued or sold in
connection with, and other fees paid to a Person that is not a Restricted
Subsidiary in connection with, any Receivables Facility.

     "Related Party" means, with respect to any Principal,

          (1) any controlling stockholder or partner of that Principal on the
     date of the indenture; or

          (2) any trust, corporation, partnership or other entity, the
     beneficiaries, stockholders, partners, owners or Persons beneficially
     holding (directly or through one or more Subsidiaries) a 51% or more
     controlling interest of

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     which consist of the Principals and/or such other Persons referred to in
     the immediately preceding clauses (1) or (2).

     "Restricted Investment" means an Investment other than a Permitted
Investment.

     "Restricted Subsidiary" of a Person means any Subsidiary of the referent
Person that is not an Unrestricted Subsidiary.

     "Sierra Acquisition" means the acquisition of SBI Holdings, Inc. by
Charles River pursuant to the terms of the Sierra Acquisition Agreement.

     "Sierra Acquisition Agreement" means Stock Purchase Agreement among
Charles River Laboratories, Inc. and SBI Holdings, Inc. and its stockholders
dated September 3, 1999.

     "Significant Subsidiary" means any Subsidiary that would be a "significant
subsidiary" as defined in Article 1, Rule 1-02 of Regulation S-X, promulgated
pursuant to the Securities Act, as that Regulation is in effect on the date
hereof.

     "Spot Rate" means, for any currency, the spot rate at which that currency
is offered for sale against United States dollars as determined by reference to
the New York foreign exchange selling rates, as published in The Wall Street
Journal on that date of determination for the immediately preceding business
day or, if that rate is not available, as determined in any publicly available
source of similar market data.

     "Stated Maturity" means, with respect to any installment of interest or
principal on any series of Indebtedness, the date on which that payment of
interest or principal was scheduled to be paid in the original documentation
governing that Indebtedness, and shall not include any contingent obligations to
repay, redeem or repurchase any that interest or principal prior to the date
originally scheduled for the payment thereof.

     "Subsidiary" means, with respect to any Person,

          (1) any corporation, association or other business entity of which
     more than 50% of the total voting power of shares of Capital Stock
     entitled (without regard to the occurrence of any contingency) to vote in
     the election of directors, managers or trustees thereof is at the time
     owned or controlled, directly or indirectly, by that Person or one or more
     of the other Subsidiaries of that Person (or a combination thereof); and

          (2) any partnership or limited liability company,

               (a) the sole general partner or the managing general partner or
          managing member of which is that Person or a Subsidiary of that
          Person; or

               (b) the only general partners or managing members of which are
          that Person or of one or more Subsidiaries of that Person (or any
          combination thereof).

     "Tax Sharing Agreement" means any tax sharing agreement or arrangement
between Charles River and Parent, as the same may be amended from time to time;
provided that in no event shall the amount permitted to be paid pursuant to all
such agreements and/or arrangements exceed the amount Charles River would be
required to pay for income taxes were it to file a consolidated tax return for
itself and its consolidated Restricted Subsidiaries as if it were a corporation
that was a parent of a consolidated group.

     "Total Assets" means the total consolidated assets of Charles River and its
Restricted Subsidiaries, as shown on the most recent balance sheet (excluding
the footnotes thereto) of Charles River.

     "Transactions" means the Recapitalization and the Sierra Acquisition.

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     "Transaction Agreements" means the Recapitalization Agreement and the
Sierra Acquisition Agreement.

     "Transaction Financing" means;

          (1) the issuance and sale by Parent of senior discount debentures
     with warrants and senior subordinated discount note for consideration

          (2) the issuance and sale by Charles River of the notes; and

          (3) the execution and delivery by Charles River and certain of its
     subsidiaries of the New Credit Facility and the borrowing of loans, if
     any, and issuance of letters of credit thereunder to fund the Transactions
     and any related transactions, including without limitation, the payment of
     fees and expenses and the refinancing of outstanding indebtedness of
     Charles River and its subsidiaries;

the proceeds of each of which were used to fund the purchase price for the
Recapitalization and related fees and expenses.

     "Unrestricted Subsidiary" means any Subsidiary that is designated by the
board of directors as an Unrestricted Subsidiary pursuant to a board resolution,
but only to the extent that Subsidiary:

          (1) has no Indebtedness other than Non-Recourse Debt;

          (2) is not party to any agreement, contract, arrangement or
     understanding with Charles River or any Restricted Subsidiary of Charles
     River unless the terms of any such agreement, contract, arrangement or
     understanding are no less favorable to Charles River or that Restricted
     Subsidiary than those that might be obtained at the time from Persons who
     are not Affiliates of Charles River;

          (3) is a Person with respect to which neither Charles River nor any
     of its Restricted Subsidiaries has any direct or indirect obligation,

               (a) to subscribe for additional Equity Interests (other than
          Investments described in clause (7) of the definition of Permitted
          Investments); or

               (b) to maintain or preserve that Person's financial condition or
          to cause that Person to achieve any specified levels, of operating
          results; and

          (4) has not guaranteed or otherwise directly or indirectly provided
     credit support for any Indebtedness of Charles River or any of its
     Restricted Subsidiaries.

     Any such designation by the board of directors shall be evidenced to the
trustee by filing with the trustee a certified copy of the board resolution
giving effect to that designation and an Officers' Certificate certifying that
designation complied with the foregoing conditions and was permitted by the
covenant described under the caption entitled "--Certain Covenants--Restricted
Payments." If, at any time, any Unrestricted Subsidiary would fail to meet the
foregoing requirements as a Unrestricted Subsidiary, it shall thereafter cease
to be an Unrestricted Subsidiary for purposes of the indenture and any
Indebtedness of that Subsidiary shall be deemed to be incurred by a Restricted
Subsidiary of Charles River as of that date (and, if that Indebtedness is not
permitted to be incurred as of that date under the covenant described under the
caption entitled "--Certain Covenants--Incurrence of Indebtedness and Issuance
of Preferred Stock," Charles River shall be in default of that covenant).

     The board of directors of Charles River may at any time designate any
Unrestricted Subsidiary to be a Restricted Subsidiary; provided that the
designation shall be deemed to be an incurrence of Indebtedness by a Restricted
Subsidiary of Charles River of any outstanding Indebtedness of that Unrestricted
Subsidiary and that designation shall only be permitted if:

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          (1) that Indebtedness is permitted under the covenant described under
     the caption entitled "--Certain Covenants--Incurrence of Indebtedness and
     Issuance of Preferred Stock"; and

          (2) no Default or Event of Default would be in existence following
     that designation.

     "Weighted Average Life to Maturity" means, when applied to any Indebtedness
at any date, the number of years obtained by dividing:

          (1) the sum of the products obtained by multiplying,

               (a) the amount of each then remaining installment, sinking fund,
          serial maturity or other required payments of principal, including
          payment at final maturity, in respect thereof; by

               (b) the number of years (calculated to the nearest one-twelfth)
          that will elapse between that date and the making of that payment; by

          (2) the then outstanding principal amount of that Indebtedness.

     "Wholly Owned Restricted Subsidiary" of any Person means a Restricted
Subsidiary of that Person all the outstanding Capital Stock or other ownership
interests of which (other than directors' qualifying shares) shall at the time
be owned by that Person or by one or more Wholly Owned Restricted Subsidiaries
of that Person or by that Person and one or more Wholly Owned Restricted
Subsidiaries of that Person.

     "Wholly Owned Subsidiary" of any Person means a Subsidiary of that Person
all of the outstanding Capital Stock or other ownership interests of which
(other than directors' qualifying shares) shall at the time be owned by that
Person or by one or more Wholly Owned Subsidiaries of that Person.

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                               THE EXCHANGE OFFER

     Pursuant to a registration rights agreement between Charles River and the
initial purchaser, we agreed

          (1) to file a registration statement on or prior to 90 days after the
     closing of the offering of the old notes with respect to an offer to
     exchange the old notes for new debt securities of Charles River registered
     under the Securities Act, with terms identical in all material respects to
     those of the old notes and

          (2) to use our reasonable best efforts to cause the registration
     statement to be declared effective by the SEC on or prior to 180 days
     after the closing of the old notes, September 29, 1999. In some
     circumstances, we will be required to provide a shelf registration
     statement to cover resales of the old notes by the holders thereof.

     The registration rights agreement provides that, in the event we fail to
satisfy our registration obligations under the registration rights agreement, we
will be required to pay liquidated damages in an amount equal to $0.05 per week
per $1,000 principal amount and increasing every 90 days thereafter up to a
maximum amount equal to $0.25 per week per $1,000 principal amount of notes
until the registration statement is declared effective. Upon consummation of the
exchange offer or the effectiveness of a registration statement, the provision
for liquidated damages on the old notes shall cease.

     The new notes have been registered under the Securities Act and transfer
restrictions and registration rights relating to the old notes do not apply to
the new notes. If you fail to exchange your old notes in the exchange offer,
your notes will remain subject to transfer restrictions.

     The exchange offer is not being made to, nor will we accept tenders for
exchange from, holders of old notes in any jurisdiction in which the exchange
offer or the acceptance thereof would not be in compliance with the securities
or blue sky laws of such jurisdiction. Each holder of old notes that wishes to
exchange old notes for new notes is required to make the representations
described below under "--Resale of the New Notes."

Terms of the Exchange Offer; Period for Tendering Old Notes

     This prospectus and the accompanying letter of transmittal contain the
terms and conditions of the exchange offer. Upon the terms and subject to the
conditions included in this prospectus and in the accompanying letter of
transmittal, which together constitute the exchange offer, we will accept for
exchange old notes which are properly tendered on or prior to the expiration
date, unless you have withdrawn them as permitted below:

     o    when you tender to us old notes as provided below, our acceptance of
          the old notes will constitute a binding agreement between you and us
          upon the terms and subject to the conditions in this prospectus and
          in the accompanying letter of transmittal.

     o    for each $1,000 principal amount of old notes surrendered to us
          pursuant to the exchange offer, we will give you $1,000 principal
          amount of new notes. Interest on each new note will accrue from the
          date of issuance of the old note for which the new note is exchanged
          or from the date of the last periodic payment of interest on such old
          note, whichever is later. No additional interest will be paid on old
          notes tendered and accepted for exchange.

     o    we will keep the exchange offer open for not less than 30 days, or
          longer if required by applicable law, after the date that we first
          mail notice of the exchange offer to the holders of the old notes. We
          are sending this prospectus, together with the letter of transmittal,
          on or about the date of this prospectus to all of the registered
          holders of old notes at their addresses listed in the trustee's
          security register with respect to old notes.

     o    the exchange offer expires at 5:00 p.m., New York City time, on ,
          1999; provided, however, that we, in our sole discretion, may extend
          the period of time for which the exchange offer is open. The term

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     "expiration date" means                 , 1999 or, if extended by us, the
     latest time and date to which the exchange offer is extended.

     o    as of the date of this prospectus, $150,000,000 in aggregate
          principal amount of the old notes were outstanding. The exchange
          offer is not conditioned upon any minimum principal amount of old
          notes being tendered.

     o    our obligation to accept old notes for exchange pursuant to the
          exchange offer is subject to conditions that we describe in the
          section below called "--Conditions to the Exchange Offer".

     o    we expressly reserve the right, at any time, to extend the period of
          time during which the exchange offer is open, and thereby delay
          acceptance of any old notes, by giving oral or written notice of such
          extension to the exchange agent and notice of such extension to the
          holders as described below. During any such extension, all old notes
          previously tendered will remain subject to the exchange offer and may
          be accepted for exchange by us. Any old notes not accepted for
          exchange for any reason will be returned without expense to the
          tendering holder thereof as promptly as practicable after the
          expiration or termination of the exchange offer.

     o    we expressly reserve the right to amend or terminate the exchange
          offer, and not to accept for exchange any old notes that we have not
          yet accepted for exchange, upon the occurrence of any of the
          conditions of the exchange offer specified below under "--Conditions
          to the Exchange Offer."

     o    we will give oral or written notice of any extension, amendment,
          termination or non-acceptance described above to holders of the old
          notes as promptly as practicable. If we extend the expiration date,
          we will give notice by means of a press release or other public
          announcement no later than 9:00 a.m., New York City Time, on the
          business day after the previously scheduled expiration date. Without
          limiting the manner in which we may choose to make any public
          announcement and subject to applicable law, we will have no
          obligation to publish, advertise or otherwise communicate any such
          public announcement other than by issuing a release to the Dow Jones
          News Service.

     o    holders of old notes do not have any appraisal or dissenters' rights
          in connection with the exchange offer.

     o    old notes which are not tendered for exchange or are tendered but not
          accepted in connection with the exchange offer will remain
          outstanding and be entitled to the benefits of the indenture, but
          will not be entitled to any further registration rights under the
          registration rights agreement.

     o    we intend to conduct the exchange offer in accordance with the
          applicable requirements of the Exchange Act and the rules and
          regulations of the SEC thereunder.

     o    by executing, or otherwise becoming bound by, the letter of
          transmittal, you will be making representations to us. See "--Resales
          of the New Notes."

     Important rules concerning the exchange offer

     You should note that:

     o    we will determine all questions as to the validity, form,
          eligibility, including time of receipt, and acceptance of old notes
          tendered for exchange in our sole discretion, which determination
          shall be final and binding.

     o    we reserve the absolute right to reject any and all tenders of any
          particular old notes not properly tendered or to not accept any
          particular old notes which acceptance might, in our judgment or the
          judgment of our counsel, be unlawful.

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     o    we also reserve the absolute right to waive any defects or
          irregularities or conditions of the exchange offer as to any
          particular old notes either before or after the expiration date,
          including the right to waive the ineligibility of any holder who
          seeks to tender old notes in the exchange offer. Unless we agree to
          waive any defect or irregularity in connection with the tender of old
          notes for exchange, such waiver must be cured within such reasonable
          period of time as we shall determine.

     o    our interpretation of the terms and conditions of the exchange offer
          as to any particular old notes either before or after the expiration
          date, including the letter of transmittal and the instructions
          thereto, shall be final and binding on all parties.

     o    neither Charles River, the exchange agent nor any other person shall
          be under any duty to give notification of any defect or irregularity
          with respect to any tender of old notes for exchange, nor shall any
          of them incur any liability for failure to give such notification.

Procedures for Tendering Old Notes

     What to submit and how

     If you, as the registered holder of an old note, wish to tender your old
notes for exchange pursuant to the exchange offer, you must transmit a properly
completed and duly executed letter of transmittal, including all other documents
required by such letter of transmittal, to State Street Bank and Trust Company
at the address set forth below under "Exchange Agent" on or prior to the
expiration date.

     In addition,

          (1) certificates for such old notes must be received by the exchange
     agent along with the letter of transmittal, or

          (2) a timely confirmation of a book-entry transfer (what we call a
     "book-entry confirmation") of such old notes, if such procedure is
     available, into the exchange agent's account at DTC pursuant to the
     procedure for book-entry transfer described below, must be received by the
     exchange agent prior to the expiration date or

          (3) you must comply with the guaranteed delivery procedures described
     below.

     The method of delivery of old notes, letters of transmittal and all other
required documents is at your election and risk. If such delivery is by mail, we
recommend that registered mail, properly insured, with return receipt requested,
be used. In all cases, sufficient time should be allowed to assure timely
delivery. No letters of transmittal or old notes should be sent to Charles
River.

     How to sign your letter of transmittal and other documents

     Signatures on a letter of transmittal or a notice of withdrawal, as the
case may be, must be guaranteed unless the old notes surrendered for exchange
pursuant thereto are tendered

          (1) by a registered holder of the old notes who has not completed the
     box entitled "Special Issuance Instructions" or "Special Delivery
     Instructions" on the letter of transmittal or

          (2) for the account of an Eligible Institution (as defined below).

If signatures on a letter of transmittal or a notice of withdrawal, as the case
may be, are required to be guaranteed, such guarantees must be by an eligible
institution that is:

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<PAGE>



     o    a member of or participant in the Securities Transfer Agents
          Medallion Program or the New York Stock Exchange Medallion Signature
          Program, or

     o    an "eligible guarantor institution" within the meaning of Rule
          17Ad-15 under the Exchange Act (an "Eligible Institution").

     If old notes are registered in the name of a person other than the person
signing the letter of transmittal, the old notes surrendered for exchange must
be endorsed by, or be accompanied by, a written instrument or instruments of
transfer or exchange, in satisfactory form as determined by us in our sole
discretion, duly executed by the registered holder with the signature thereon
guaranteed by an Eligible Institution.

     If the letter of transmittal is signed by a person or persons other than
the registered holder or holders of old notes, such old notes must be endorsed
or accompanied by appropriate powers of attorney, in either case signed exactly
as the name or names of the registered holder or holders that appear on the old
notes.

     If the letter of transmittal or any old notes or powers of attorney are
signed by trustees, executors, administrators, guardians, attorneys-in-fact,
officers or corporations or others acting in a fiduciary or representative
capacity, such person should so indicate when signing and, unless waived by
Charles River, proper evidence satisfactory to Charles River of its authority to
so act must be submitted.

Acceptance of Old Notes for Exchange; Delivery of New Notes

     Upon satisfaction or waiver of all of the conditions to the exchange offer,
we will accept, promptly after the expiration date, all old notes properly
tendered and will issue the new notes promptly after acceptance of the old
notes. See "--Conditions to the Exchange Offer" below. For purposes of the
exchange offer, we shall be deemed to have accepted properly tendered old notes
for exchange when, as and if we have given oral or written notice thereof to the
Exchange Agent.

     In all cases, we will only issue new notes in exchange for old notes that
are accepted for exchange after timely receipt by the exchange agent of:

     o    certificates for such old notes or

          o    a timely book-entry confirmation of such old notes into the
               exchange agent's account at DTC pursuant to the book-entry
               transfer procedures described below, and

          o    a properly completed and duly executed letter of transmittal and
               all other required documents.

     If we do not accept any tendered old notes for any reason included in the
terms and conditions of the exchange offer or if you submit certificates
representing old notes in a greater principal amount than you wish to exchange,
we will return such unaccepted or non-exchanged old notes without expense to the
tendering holder or, in the case of old notes tendered by book-entry transfer
into the exchange agent's account at DTC pursuant to the book-entry transfer
procedures described below, such non-exchanged old notes will be credited to an
account maintained with DTC as promptly as practicable after the expiration or
termination of the exchange offer.

Book-Entry Transfer

     The exchange agent will make a request to establish an account with respect
to the old notes at DTC for purposes of the exchange offer promptly after the
date of this prospectus. Any financial institution that is a Participant in
DTC's systems may make book-entry delivery of old notes by causing DTC to
transfer such old notes into the exchange agent's account in accordance with
DTC's Automated Tender Offer Program ("ATOP") procedures for transfer. However,
the exchange for the old notes so tendered will only be made after timely
confirmation of such book-entry transfer of old notes into the exchange agent's
account, and timely receipt by the exchange agent of an Agent's Message

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<PAGE>



(as defined in the next sentence) and any other documents required by the letter
of transmittal. The term "Agent's Message" means a message, transmitted by DTC
and received by the exchange agent and forming a part of a Book-Entry
Confirmation, which states that DTC has received an express acknowledgment from
a Participant tendering old notes that are the subject of such Book-Entry
Confirmation that such Participant has received and agrees to be bound by the
terms of the letter of transmittal, and that we may enforce such agreement
against such Participant. Although delivery of old notes may be effected through
book-entry transfer into the exchange agent's account at DTC, the letter of
transmittal, or facsimile thereof, properly completed and duly executed, with
any required signature guarantees and any other required documents, must in any
case be delivered to and received by the exchange agent at its address set forth
under "--Exchange Agent" on or prior to the expiration date, or the guaranteed
delivery procedure set forth below must be complied with.

     Delivery of documents to DTC in accordance with its procedures does not
constitute delivery to the exchange agent.

Guaranteed Delivery Procedures

     If you are a registered holder of old notes and you want to tender such old
notes but your old notes are not immediately available, or time will not permit
your old notes or other required documents to reach the exchange agent before
the expiration date, or the procedure for book-entry transfer cannot be
completed on a timely basis, a tender may be effected if

          (1) the tender is made through an Eligible Institution,

          (2) prior to the expiration date, the exchange agent receives from
     such Eligible Institution a properly completed and duly executed letter of
     transmittal, or a facsimile thereof, and notice of guaranteed delivery,
     substantially in the form provided by us by facsimile transmission, mail
     or hand delivery, stating:

               o    the name and address of the holder of old notes

               o    the amount of old notes tendered

               o    the tender is being made by delivering such notice and
                    guaranteeing that within five New York Stock Exchange
                    trading days after the date of execution of the notice of
                    guaranteed delivery, the certificates of all physically
                    tendered old notes, in proper form for transfer, or a
                    book-entry confirmation, as the case may be, and any other
                    documents required by the letter of transmittal will be
                    deposited by that Eligible Institution with the exchange
                    agent and

          (3) the certificates for all physically tendered old notes, in proper
     form for transfer, or a book-entry confirmation, as the case may be, and
     all other documents required by the letter of transmittal, are received by
     the exchange agent within five New York Stock Exchange trading days after
     the date of execution of the notice of guaranteed delivery.

Withdrawal Rights

     You can withdraw your tender of old notes at any time prior to the
expiration date.

     For a withdrawal to be effective, a written notice of withdrawal must be
received by the exchange agent at one of the addresses listed below under
"--Exchange Agent." Any such notice of withdrawal must specify:

     o    the name of the person having tendered the old notes to be withdrawn.

     o    the old notes to be withdrawn, including the principal amount of such
          old notes.

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<PAGE>



     o    if certificates for old notes have been delivered to the exchange
          agent, the name in which such old notes are registered, if different
          from that of the withdrawing holder.

     o    if certificates for old notes have been delivered or otherwise
          identified to the exchange agent, then, prior to the release of such
          certificates, you must also submit the serial numbers of the
          particular certificates to be withdrawn and a signed notice of
          withdrawal with signatures guaranteed by an Eligible Institution
          unless you are an Eligible Institution.

     o    if old notes have been tendered pursuant to the procedure for
          book-entry transfer described above, any notice of withdrawal must
          specify the name and number of the account at DTC to be credited with
          the withdrawn old notes and otherwise comply with the procedures of
          such facility.

     Please note that all questions as to the validity, form and eligibility,
including time of receipt, of such notices of withdrawal will be determined by
us, and our determination shall be final and binding on all parties. Any old
notes so withdrawn will be deemed not to have been validly tendered for exchange
for purposes of the exchange offer.

     If you have properly withdrawn old notes and wish to re-tender them, you
may do so by following one of the procedures described under "--Procedures for
Tendering Old Notes" above at any time on or prior to the expiration date.

Conditions to the Exchange Offer

     Notwithstanding any other provisions of the exchange offer, we will not be
required to accept for exchange, or to issue new notes in exchange for, any old
notes and may terminate or amend the exchange offer, if at any time before the
acceptance of such old notes for exchange or the exchange of the new notes for
such old notes, such acceptance or issuance would violate applicable law or any
interpretation of the staff of the SEC.

     The foregoing condition is for our sole benefit and may be asserted by us
regardless of the circumstances giving rise to such condition. Our failure at
any time to exercise the foregoing rights shall not be deemed a waiver by us of
any such right and each such right shall be deemed an ongoing right which may be
asserted at any time and from time to time.

     In addition, we will not accept for exchange any old notes tendered, and no
new notes will be issued in exchange for any such old notes, if at such time any
stop order shall be threatened or in effect with respect to the exchange offer
of which this prospectus constitutes a part or the qualification of the
indenture under the Trust Indenture Act.

Exchange Agent

     State Street Bank and Trust Company has been appointed as the exchange
agent for the exchange offer. All executed letters of transmittal should be
directed to the exchange agent at one of the addresses set forth below.
Questions and requests for assistance, requests for additional copies of this
prospectus or of the letter of transmittal and requests for notices of
guaranteed delivery should be directed to the exchange agent, addressed as
follows:

                                         Deliver To:

By Overnight Courier or Hand:              By Registered or Certified Mail:
State Street Bank and Trust Company        State Street Bank and Trust Company
Corporate Trust Department                 Corporate Trust Department
Two Avenue de Lafayette                    Two Avenue de Lafayette
Boston, Massachusetts 02111-1724           Boston, Massachusetts 02111-1724
Fifth Floor                                Fifth Floor
Attn: Kellie Mullen                        Attn: Kellie Mullen
Telephone: (617) 662-1525                  Telephone: (617) 662-1525
Facsimile: (617) 662-1450                  Facsimile: (617) 662-1450



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     Delivery to an address other than as listed above or transmission of
instructions via facsimile other than as listed above does not constitute a
valid delivery.

Fees and Expenses

     The principal solicitation is being made by mail; however, additional
solicitation may be made by telegraph, telephone or in person by our officers,
regular employees and affiliates. We will not pay any additional compensation to
any such officers and employees who engage in soliciting tenders. We will not
make any payment to brokers, dealers, or others soliciting acceptances of the
exchange offer. However, we will pay the exchange agent reasonable and customary
fees for its services and will reimburse it for its reasonable out-of-pocket
expenses in connection therewith.

     The estimated cash expenses to be incurred in connection with the exchange
offer will be paid by us and are estimated in the aggregate to be $.4 million.

Transfer Taxes

     Holders who tender their old notes for exchange will not be obligated to
pay any transfer taxes in connection therewith, except that holders who instruct
us to register new notes in the name of, or request that old notes not tendered
or not accepted in the exchange offer be returned to, a person other than the
registered tendering holder will be responsible for the payment of any
applicable transfer tax thereon.

Resale of the New Notes

     Under existing interpretations of the staff of the SEC contained in several
no-action letters to third parties, the new notes would in general be freely
transferable after the exchange offer without further registration under the
Securities Act. However, any purchaser of old notes who is an "affiliate" of
Charles River or who intends to participate in the exchange offer for the
purpose of distributing the new notes

     (1)  will not be able to rely on the interpretation of the staff of the
          SEC,

     (2)  will not be able to tender its old notes in the exchange offer and

     (3)  must comply with the registration and prospectus delivery
          requirements of the Securities Act in connection with any sale or
          transfer of the notes unless such sale or transfer is made pursuant
          to an exemption from such requirements.

     By executing, or otherwise becoming bound by, the letter of transmittal,
each holder of the old notes, other than specified holders, will represent that:

     (1)  it is not our "affiliate";

     (2)  any new notes to be received by it were acquired in the ordinary
          course of its business; and

     (3)  it has no arrangement with any person to participate in the
          distribution, within the meaning of the Securities Act, of the new
          notes.

In addition, in connection with any resales of new notes, any broker-dealer
participating in the exchange offer who acquired notes for its own account as a
result of market-making or other trading activities must deliver a prospectus
meeting the requirements of the Securities Act. The SEC has taken the position
that participating broker-dealers may fulfill their prospectus delivery
requirements with respect to the new notes, other than a resale of an unsold
allotment from the original sale of the old notes, with this prospectus. Under
the registration rights agreement, we are required to allow participating
broker-dealers and other persons, if any, subject to similar prospectus delivery
requirements to use

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<PAGE>



this prospectus as it may be amended or supplemented from time to time, in
connection with the resale of such new notes.

         CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE EXCHANGE OFFER

     The exchange of old notes for new notes pursuant to the exchange offer will
not result in any United States federal income tax consequences to holders. When
a holder exchanges an old note for a new note pursuant to the exchange offer,
the holder will have the same adjusted basis and holding period in the new note
as in the old note immediately before the exchange.

                              PLAN OF DISTRIBUTION

     Each broker-dealer that receives new notes for its own account pursuant to
the exchange offer must acknowledge that it will deliver a prospectus in
connection with any resale of such new notes. This prospectus, as it may be
amended or supplemented from time to time, may be used by a broker-dealer in
connection with resales of new notes received in exchange for old notes where
such old notes were acquired as a result of market-making activities or other
trading activities. We have agreed that we will make this prospectus, as amended
or supplemented, available to any participating broker-dealer for use in
connection with any such resale and participating broker-dealers shall be
authorized to deliver this prospectus for a period not exceeding 90 days after
the exchange offer expiration date.

     We will not receive any proceeds from any sale of new notes by
broker-dealers. New notes received by broker-dealers for their own account
pursuant to the exchange offer may be sold from time to time in one or more
transactions in the over-the-counter market, in negotiated transactions, through
the writing of options on the new notes or a combination of such methods of
resale, at market prices prevailing at the time of resale, at prices related to
such prevailing market prices or negotiated prices. Any such resale may be made
directly to purchasers or to or through brokers or dealers who may receive
compensation in the form of commissions or concessions from any such
broker-dealer or the purchasers of any such new notes. Any broker-dealer that
resells new notes that were received by it for its own account pursuant to the
exchange offer and any broker or dealer that participates in a distribution of
such new notes may be deemed to be an "underwriter" within the meaning of the
Securities Act and any profit on any such resale of new notes and any commission
or concessions received by any such persons may be deemed to be underwriting
compensation under the Securities Act. The letter of transmittal states that, by
acknowledging that it will deliver and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.

     For a period of 90 days after the exchange offer expiration date, we will
promptly send additional copies of this prospectus and any amendment or
supplement to this prospectus to any Participating Broker-Dealer that requests
such documents in the letter of transmittal. See "The Exchange Offer." We have
agreed to pay all expenses incident to the exchange offer and will indemnify
holders of the old notes (including any broker-dealers) against some
liabilities, including some liabilities under the Securities Act.

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                                 LEGAL MATTERS

     The validity of the new notes offered hereby will be passed upon for
Charles River Laboratories, Inc. and Charles River Laboratories Holdings, Inc.
by Davis Polk & Wardwell, New York, New York.

                            INDEPENDENT ACCOUNTANTS

     The consolidated financial statements of Charles River Laboratories, Inc.
and the combined financial statements of Charles River Laboratories Holdings,
Inc. and Charles River Laboratories, Inc. as of December 27, 1997 and December
26, 1998 and for each of the three years in the period ended December 26, 1998
included in this prospectus have been audited by PricewaterhouseCoopers LLP as
stated in their report appearing herein.

                      WHERE YOU CAN FIND MORE INFORMATION

     We have filed with the SEC a registration statement on Form S-1 under the
Securities Act with respect to our offering of the new notes. This prospectus
does not contain all the information included in the registration statement and
the related exhibits and schedules. You will find additional information about
us and the new notes in the registration statement. The registration statement
and the related exhibits and schedules may be inspected and copied at the
public reference facilities maintained by the SEC at Room 1024, Judiciary
Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, and at the public
reference facilities of the SEC's Regional Offices: New York Regional Office,
Seven World Trade Center, Suite 1300, New York, New York 10048; and Chicago
Regional Office, Citicorp Center, 500 West Madison Street, Chicago, Illinois
60661. Copies of this material may also be obtained from the Public Reference
Section of the SEC at 450 Fifth Street, N.W., Washington, D.C. 20549 at
prescribed rates. You can obtain information on the operation of the public
reference facilities by calling 1-800-SEC-0330. The SEC also maintains a site
on the World Wide Web (http://www.sec.gov) that contains reports, proxy and
information statements and other information regarding registrants, including
Charles River, that file electronically with the SEC. Statements made in this
prospectus about legal documents may not necessarily be complete and you should
read the documents which are filed as exhibits or schedules to the registration
statement or otherwise filed with the SEC.

     We are required under the indenture governing the notes to furnish the
holders of notes with all quarterly and annual financial information that would
be required to be contained in a filing with the SEC on forms 10-Q and 10-K if
Charles River were required to file such Forms, including, without limitation,
(a) "Management's Discussion and Analysis of Financial Condition and Results of
Operations" and, with respect to the annual information only, a report thereon
by Charles River's certified independent accountants, and (b) all current
reports that would be required to be filed with the SEC on Form 8-K if Charles
River were required to file such reports, in each case, within the time periods
specified in the SEC's rules and regulations.

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<PAGE>



       INDEX TO UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL DATA

                                                                           Page
                                                                           ----
Introduction to Unaudited Pro Forma Condensed Consolidated Financial Data...P-2

Charles River Laboratories, Inc. and Subsidiaries
Unaudited Pro Forma Condensed Consolidated Balance Sheet
  as of September 25, 1999..................................................P-4
Notes to Unaudited Pro Forma Condensed Consolidated Balance Sheet
  as of September 25, 1999..................................................P-5
Unaudited Pro Forma Condensed Consolidated Statement of Income
  for the Year Ended December 26, 1998......................................P-6
Unaudited Pro Forma Condensed Consolidated Statement of Income
  for the Nine Months Ended September 26, 1998..............................P-7
Unaudited Pro Forma Condensed Consolidated Statement of Income
  for the Nine Months Ended September 25, 1999..............................P-8
Unaudited Pro Forma Condensed Consolidated Statement of Income
  for the Twelve Months Ended September 25, 1999............................P-9
Notes to Unaudited Pro Forma Condensed Consolidated Statements of Income....P-10




                                      P-1


<PAGE>



                 INTRODUCTION TO UNAUDITED PRO FORMA CONDENSED
                          CONSOLIDATED FINANCIAL DATA

     On September 29, 1999, Charles River Laboratories, Inc. (the "Company" or
"Charles River") consummated a recapitalization transaction pursuant to a
recapitalization agreement dated as of July 25, 1999 (the "Recapitalization
Agreement") with Bausch & Lomb Incorporated ("B&L"), certain subsidiaries of B&L
(such subsidiaries and B&L are referred to, collectively, as the "Rollover
Shareholders"), Endosafe, Inc. (renamed Charles River Laboratories Holdings,
Inc., referred to as "Holdings") and CRL Acquisition LLC, a subsidiary of DLJ
Merchant Banking Partners II, L.P. ("DLJMB"). Prior to the consummation of the
Recapitalization, the Company became a wholly owned subsidiary of Holdings.
Holdings has no operations other than those related to Charles River. Holdings
was recapitalized in a transaction providing aggregate consideration of $456.2
million, consisting of $400.0 million in cash, a subordinated discount note for
$43.0 million to be issued by Holdings to the Rollover Shareholders and equity
to be retained by the Rollover Shareholders with a fair market value of $13.2
million (the "Recapitalization"). The $400.0 million cash consideration was
raised through the following:

     o    $92.4 million cash equity investment in Holdings by DLJMB and certain
          of its affiliated funds (collectively, "the DLJMB Funds"), management
          and certain other investors

     o    $37.6 million senior discount debentures with warrants issued by
          Holdings to DLJMB and some of its affiliates and other investors

     o    $162.0 million senior secured credit facilities at the Company

     o    a portion of the net proceeds of the Company's units offered hereby

     Upon the consummation of the Recapitalization, the DLJMB Funds, management
and certain other investors owned 87.5% of the outstanding capital stock of
Holdings and B&L owned 12.5% of the outstanding capital stock of Holdings. The
Recapitalization has been accounted for as a leveraged recapitalization, which
will have no impact on the historical basis of Holdings' and, accordingly
Charles River's, assets and liabilities.

     Simultaneously with the Recapitalization, the Company acquired SBI
Holdings, Inc. ("Sierra") pursuant to a stock purchase agreement (the "Sierra
Acquisition") for an initial purchase price of $24.0 million, of which
approximately $6.0 million was used to repay Sierra's existing debt, which the
Company funded with available cash, a portion of the net proceeds from the notes
offered hereby and a portion of the borrowings under our new credit facility. In
addition, the Company has agreed to pay (a) up to $2.0 million in contingent
consideration if certain financial objectives are reached by December 31, 2000,
(b) up to $10.0 million in performance-based bonus payments if certain financial
objectives are reached over the next five years, and (c) $3.0 million in
retention and non-competition payments contingent upon the continuing employment
of certain key scientific and managerial personnel through June 30, 2001. The
Recapitalization and the Sierra Acquisition are collectively referred to as the
"Transactions." The Recapitalization and the Sierra Acquisition were consummated
concurrently.

     The following unaudited pro forma condensed consolidated financial data of
the Company is based upon historical consolidated financial statements of
Charles River as adjusted to give effect to the impact of the Transactions and
the application of the related net proceeds therefrom as discussed under the
captions "Transactions" and "Use of Proceeds." The unaudited pro forma condensed
consolidated balance sheet as of September 25, 1999 gives effect to the
Transactions assuming that the Transactions had occurred on September 25, 1999.
The unaudited pro forma condensed consolidated statements of income for the year
ended December 26, 1998, the nine months ended September 26, 1998, the nine
months ended September 25, 1999 and for the twelve month period ended September
25, 1999 give effect to the Transactions as if they had occurred at the
beginning of the period presented. The unaudited pro forma condensed
consolidated statements of income for the twelve months ended December 26, 1998,
the nine months ended September 26, 1998 and the twelve months ended September
25, 1999 also give effect to the Tektagen, Therion and ESD Acquisitions (the
"1998 Acquisitions") as if they all had occurred at the beginning of the period
presented.

                                      P-2


<PAGE>



     The pro forma adjustments are based on estimates, available information and
certain assumptions and may be revised as additional information becomes
available. The unaudited pro forma condensed consolidated financial data do not
purport to represent what Charles River results of operations or financial
position would actually have been if the Transactions and other adjustments had
occurred on the dates indicated and are not necessarily representative of
Charles River results of operations for any future period. The unaudited pro
forma condensed consolidated balance sheet and consolidated statements of income
should be read in conjunction with our consolidated financial statements and the
notes thereto, "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and the other financial information appearing elsewhere
in this prospectus.

                                      P-3


<PAGE>



                        CHARLES RIVER LABORATORIES, INC.
            UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                            As of September 25, 1999
                             (dollars in thousands)

<TABLE>
                                                                                                         Sierra
                                               Settlement                      Pro Forma        -------------------------
                                 Company          with       Recapitalization    for the                      Acquisition
                                Historical        B&L(a)       Adjustments    Recapitalization  Historical(b) Adjustments Pro Forma
                                ----------     ----------    ---------------- ----------------  ------------- ----------- ---------
<S>                             <C>            <C>            <C>               <C>             <C>           <C>          <C>
Assets
Current assets:
   Cash and cash equivalents    $   3,457      $  2,437       $ 21,827(c)       $ 27,721        $    292     $(24,335)(d) $   3,678
   Trade receivables........       33,820            --             --            33,820           2,493           --        36,313
   Inventories..............       28,577            --             --            28,577             853           --        29,430
   Deferred income taxes....        5,432        (5,432)            --                --              --           --            --
   Due from affiliates......          966            --             --               966              --           --           966
   Other current assets.....        5,051            --             --             5,051             791           --         5,842
                                ---------      --------       --------          --------        --------     --------     ---------
   Total current assets.....       77,303        (2,995)        21,827            96,135          4 ,429      (24,335)       76,229
                                =========      ========       ========          ========        ========     ========     =========
Property, plant and
   equipment, net...........       79,349            --             --            79,349           4,918           --        84,267
Goodwill and other
   intangibles, net.........       16,212            --             --            16,212           4,919       12,926(d)     34,057
Investments in affiliates...       19,385            --             --            19,385              --           --        19,385
Deferred tax assets.........        5,787        (5,787)        88,060(e)         88,060              --           --        88,060
Other assets................       12,335            --         13,237(c)         25,572             254           --(d)     25,826
                                ---------      --------       --------          --------        --------     --------     ---------
   Total assets.............    $ 210,371      $ (8,782)      $123,124          $324,713        $ 14,520      (11,409)    $ 327,824
                                =========      ========       ========          ========        ========     ========     =========
Liabilities and
   Shareholder's Equity
   Current Liabilities:
   Current portion of long-
      term debt.............    $     166      $     --       $  1,200(c)       $  1,366        $  1,729     $ (1,729)(d) $   1,366
   Current portion of
      capital lease
      obligations...........          167            --             --               167             105           --           272
   Accounts payable.........        5,992            --             --             5,992           1,134           --         7,126
   Accrued compensation.....       11,015            --             --            11,015             569           --        11,584
   Accrued ESLIRP...........        5,845            --             --             5,845              --           --         5,845
   Accrued restructuring....          354            --             --               354              --           --           354
   Deferred income..........        4,550            --             --             4,550              --           --         4,550
   Accrued liabilities......       12,410            --             --            12,410             852           --        13,262
   Accrued income taxes.....       16,208       (16,208)            --                --              --           --            --
                                ---------      --------       --------          --------        --------     --------     ---------
   Total current liabilities       56,707      (16,208)          1,200            41,699           4,389       (1,729)       44,359

Long-term debt..............           --           --         308,672(c)        308,672           4,240       (4,240)(d)   308,672
Long-term capital lease
   obligations..............          700           --             --                700             118           --          818
Other long-term liabilities.        3,706           --             --              3,706             333           --        4,039
                                ---------      --------       --------          --------        --------     --------     ---------
   Total liabilities........       61,113      (16,208)        309,872           354,777           9,080       (5,969)     357,888
                                ---------      --------       --------          --------        --------     --------     ---------
Minority interests..........          293           --              --               293              --           --           293
Shareholder's equity
   Common stock.............            1           --              --                 1              --           --             1
   Capital in excess of par
      value.................       17,836           --          88,060(e)        105,896           4,667       (4,667)(d)   105,896
   Retained earnings
      (accumulated deficit).      142,422        7,426        (273,888)(c)      (124,040)          4,057       (4,057)(d)  (124,040)
   Treasury stock, at cost..           --           --              --                --          (3,284)       3,284 (d)        --


                                      P-4


<PAGE>



                                                                                                         Sierra
                                               Settlement                      Pro Forma        -------------------------
                                 Company          with       Recapitalization    for the                      Acquisition
                                Historical        B&L(a)       Adjustments    Recapitalization  Historical(b) Adjustments Pro Forma
                                ----------     ----------    ---------------- ----------------  ------------- ----------- ---------
<S>                             <C>            <C>            <C>               <C>             <C>           <C>          <C>
   Loans to officers........                                      (920)             (920)                                      (920)
   Accumulated other
      comprehensive
      income (accumulated
      deficit)..............      (11,294)          --              --           (11,294)             --           --       (11,294)
                                ---------      --------       --------          --------        --------     --------     ---------
   Total shareholder's equity     148,965         7,426       (186,748)          (30,357)          5,440       (5,440)      (30,357)
                                ---------      --------       --------          --------        --------     --------     ---------
   Total liabilities and
      shareholder's equity      $ 210,371      $ (8,782)      $123,124          $324,713        $ 14,520     $(11,409     $ 327,824
                                =========      ========       ========          ========        ========     ========     =========
- -------------------
(a)  Represents assets and liabilities of Charles River as of September 25,
     1999 that, according to the terms of the Recapitalization Agreement, were
     distributed to or assumed by B&L in conjunction with the closing of the
     Recapitalization and, accordingly, are not part of the ongoing operations
     of Charles River. In addition, the adjustment includes a cash settlement
     paid by B&L to Charles River in accordance with the terms of the
     Recapitalization Agreement.

(b)  Reflects Sierra's historical unaudited consolidated balance sheet at
     September 25, 1999.

(c)  Holdings was recapitalized as described under the caption "Transactions."
     The Company's portion of the sources and uses of cash required to
     consummate the Transactions as of September 25, 1999 follow:
</TABLE>

Sources:
Available cash..........................................$  2,173
New credit facility
     Revolving credit facility..........................   2,000
     Term loans......................................... 160,000
Units(1)................................................ 150,000
                                                        --------
     Total cash sources.................................$314,173
                                                        ========
Uses:
Distribution to Holdings................................$270,000
Cash consideration for Sierra acquisition(1)............  24,000
Debt issuance costs.....................................  13,237
Estimated transaction fees and expenses(2)..............   6,016
Loans to officer........................................     920
                                                        --------
     Total cash uses....................................$314,173
                                                        ========
- -------------------
(1)  The fair value of the related warrants was estimated at $2,128.

(2)  Consists of bridge facility commitment, legal and other professional fees.
     Does not include fees associated with the Sierra Acquisition (see note (d)
     below).

                                      P-5


<PAGE>



(d)  Reflects the Sierra Acquisition adjustments. Goodwill represents the
     excess purchase price paid over the estimated fair value of net
     identifiable assets acquired and is amortized over fifteen years using the
     straight-line method. The sources and uses of cash which were required to
     consummate the Sierra Acquisition on September 29, 1999 follow:

Sources:
Available cash.........................................$24,335
                                                       -------
     Total cash sources................................$24,335
                                                       =======
Uses:

Sierra acquisition consideration(1)....................$24,000
Estimated transaction fees and expenses(2).............    335
                                                       -------
     Total cash uses...................................$24,335
                                                       =======

- -------------------
(1)  Approximately $6,000 will be used to repay Sierra's existing debt.

(2) Consists of legal and other professional fees.

In conjunction with the Sierra Acquisition, the Company has agreed to pay
additional consideration of up to $2,000 if Sierra achieves certain financial
targets by December 31, 2000. This additional consideration, if any, will be
recorded as additional goodwill at the time the contingency is resolved.

(e)  The adjustment reflects the increase in the deferred tax assets of the
     Company due to the Section 338(h)(10) election made in conjunction with
     the Recapitalization. Such election results in a step-up in the tax basis
     of the underlying assets. The resulting net deferred tax asset of
     approximately $88,060 is expected to be realized over 15 years through
     future tax deductions which are expected to reduce future tax payments. In
     connection with the establishment of this net deferred tax asset,
     management has recorded a valuation allowance of $7,770, primarily related
     to its realizability with respect to state income taxes. Management has
     recorded this net deferred tax asset based on its belief that it is more
     likely than not that it will be realized. This belief is based upon a
     review of all available evidence, including historical operating results,
     projections of future taxable income, and tax planning strategies.



                                      P-6


<PAGE>



                        CHARLES RIVER LABORATORIES, INC.
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                             (dollars in thousands)

<TABLE>
                                                    For the Year Ended December 26, 1998(a)
                              ------------------------------------------------------------------------------------------------------
                                                                                Pro Forma
                                                                                 for the
                                                                             Recapitalization           Sierra
                               Company        1998        Recapitalization     and the 1998   --------------------------
                              Historical  Acquisitions(b)    Adjustments       Acquisitions    Historical(c) Adjustments   Pro Forma
                              ----------  --------------  ----------------   ----------------  ------------  -----------   ---------
<S>                            <C>          <C>             <C>                 <C>               <C>        <C>           <C>
Net sales...................   $193,301     $3,457          $       --          $196,758          $19,880    $   --        $216,638
Cost of products sold and
 services provided..........    122,547      2,716                  --           125,263           10,634        --         135,897
Selling, general and
 administrative expenses....     34,142        805                  41(d)         34,988            6,227        --          41,215
Amortization of goodwill
and other intangibles.......      1,287        116(e)               --             1,403              256       926(e)        2,585
                               --------     ------          ----------          --------          -------    ------        --------
Operating income............     35,325       (180)                (41)           35,104            2,763      (926)         36,941
Interest income.............        986         --                (986)(f)            --               --        --              --
Interest expense............       (421)       (23)            (36,279)(g)       (36,723)            (762)      762(h)      (36,723)
Loss from foreign currency,
 net........................        (58)        --                  --               (58)              --        --             (58)
                               --------     ------          ----------          --------          -------    ------        --------
Income (loss) before income
 taxes, minority interests
 and earnings from equity
 investments................     35,832       (203)           (37,306)            (1,677)           2,001      (164)            160
Provision (benefit) for
income taxes................     14,123        150            (14,670)(i)           (397)             820       305(j)          728
                               --------     ------          ----------          --------          -------    ------        --------
Income (loss) before
 minority interests and
 earnings from equity
 investments................     21,709       (353)           (22,636)            (1,280)           1,181      (469)           (568)
Minority interests..........        (10)        --                 --                (10)              --        --             (10)
Earnings from equity
 investments................      1,679          2                 --              1,681               --        --           1,681
                               --------     ------          ----------          --------          -------    ------        --------
Net income (loss)...........   $ 23,378     $ (351)         $ (22,636)          $    391          $ 1,181    $ (469)       $  1,103
                               ========     ======          =========           ========          =======    ======        ========
</TABLE>

                                                        P-7


<PAGE>



                        CHARLES RIVER LABORATORIES, INC.
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                             (dollars in thousands)

<TABLE>
                                                    For the Nine Months Ended September 26, 1998(a)
                              ------------------------------------------------------------------------------------------------------
                                                                                Pro Forma
                                                                                 for the
                                                                             Recapitalization           Sierra
                               Company        1998        Recapitalization     and the 1998   --------------------------
                              Historical  Acquisitions(b)    Adjustments       Acquisitions    Historical(c) Adjustments   Pro Forma
                              ----------  --------------  ----------------   ----------------  ------------  -----------   ---------
<S>                            <C>          <C>              <C>                <C>             <C>          <C>           <C>
Net sales...................   $145,519     $2,984            $     --          $148,503        $14,769      $    --       $163,272
Cost of products sold and
   services provided........     91,041      2,436                  --            93,477          7,869           --        101,346
Selling, general and
   administrative expenses..     25,202        723                  47(d)         25,972          4,265           --         30,237
Amortization of goodwill and
   other intangibles........      1,036        116(e)               --             1,152            192          700(e)       2,044
Restructuring charges.......         --         --                  --                --             --           --             --
                               --------     ------             --------         --------        -------       ------       --------
Operating income............     28,240       (291)                (47)           27,902          2,443         (700)        29,645
Interest income ............        659         --                (659)(f)            --             --           --             --
Interest expense............       (311)       (23)            (27,210)(g)       (27,544)          (513)         513(h)     (27,544)
Loss from foreign currency,
  net.......................       (127)        --                  --              (127)            --           --           (127)
                               --------     ------             --------         --------        -------       ------       --------
Income (loss) before income
   taxes,  minority interests
   and earnings from equity
   investments..............     28,461       (314)             (27,916)             231          1,930         (187)            --
Provision (benefit) for
   income taxes.............     11,280        105              (10,985)(i)          400            791          205          1,396
                               --------     ------             --------         --------        -------       ------       --------
Income (loss) before minority
   interests and earnings from
   equity investments.......     17,181       (419)             (16,931)            (169)         1,139         (392)           578
   Minority interests.......         (8)        --                                    (8)            --           --             (8)
Earnings from equity
   investments..............      1,286          2                   --            1,288             --           --          1,288
                               --------     ------             --------         --------        -------       ------       --------
Net income (loss)............. $ 18,459     $ (417)            $(16,931)        $  1,111        $ 1,139       $ (392)      $  1,858
                               ========     ======             ========         ========        =======       ======       ========
</TABLE>

                                      P-8


<PAGE>



                        CHARLES RIVER LABORATORIES, INC.
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                             (dollars in thousands)

<TABLE>

                                                      For the Nine Months Ended September 25, 1999(a)
                              ---------------------------------------------------------------------------------------------------
                                                                                                                  Pro Forma for
                                                                                           Sierra                Recapitalization
                               Company     Recapitalization      Pro Forma        --------------------------         & Sierra
                              Historical     Adjustments      Recapitalization    Historical(c)  Adjustments        Acquisition
                              ----------   ----------------   ----------------    ------------   -----------     ----------------
<S>                            <C>            <C>                <C>                <C>             <C>             <C>
Net sales..................... $161,096       $      --          $161,096           $16,034         $   --          $177,130
Cost of products sold and
   services provided..........   97,230              --            97,230             9,589             --                --
Selling, general and
   administrative expenses....   29,414             (18)(d)        29,396             5,364             --                --
Amortization of goodwill and
   other intangibles..........    1,114              --             1,114               192            700(e)
Restructuring charges.........       --              --                --                --             --                --
                               --------        --------          --------           -------        -------          --------
Operating income..............   33,338              18            33,356               889           (700)           33,545
Other income..................    1,441              --             1,441                --             --             1,441
Interest income...............      496            (496)(f)            --                --             --               --
Interest expense..............     (207)        (29,373)(g)       (29,580)             (321)           321(h)        (29,580)
Loss from foreign currency,
   net........................     (143)             --              (143)               --             --              (143)
                               --------        --------          --------           -------        -------          --------
Income (loss) before income
   taxes, minority interests
   and earnings from equity
   investments................   34,925         (29,851)            5,074               568           (379)              --
Provision (benefit) for
   income taxes...............   16,903         (14,447)(i)         2,456               233            128(j)         2,817
                               --------        --------          --------           -------        -------         --------
Income (loss) before
   minority interests and
   earnings from equity
   investments................   18,022         (15,404)            2,618               335           (507)           2,446
   Minority interests.........      (10)             --               (10)               --             --              (10)
Earnings from equity
   investments................    1,940              --             1,940                --             --            1,940
                               --------        --------          --------           -------        -------         --------
Net income (loss)............. $ 19,952        $(15,404)         $  4,548           $   335        $  (507)        $  4,376
                               ========        ========          ========           =======        =======         ========
</TABLE>

                                      P-9


<PAGE>



                        CHARLES RIVER LABORATORIES, INC.
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME
                             (dollars in thousands)

<TABLE>

                                            For the Twelve Months Ended September 25, 1999(m)
                              -----------------------------------------------------------------------
                                               1998
                                           Acquisition(b)
                               Company     -------------      Recapitalization      Pro Forma
                              Historical        ESD              Adjustments      Recapitalization
                              ----------   ----------------   ----------------    ----------------
<S>                            <C>             <C>               <C>                  <C>
Net sales...................   $208,878        $  473            $    --              $209,351
Cost of products sold and
   services provided........    128,736           280                 --               129,016
Selling, general and
   administrative expenses..     38,354            82                (24)(d)            38,412
Amortization of goodwill and
   other intangibles........      1,365            --                 --                 1,365
                                -------         -----           --------              --------
Operating income............     40,423           111                 24                40,558
Other income................      1,441            --                 --                 1,441
Interest income.............        823            --               (823)(f)                --
Interest expense............       (317)           --            (38,442)(g)           (38,759)
Loss from foreign currency,
  net.......................        (74)           --                 --                   (74)
                                -------         -----           --------              --------
Income (loss) before income
   taxes, minority interests an
   earnings from equity
   investments..............     42,296           111            (39,241)                3,166
Provision (benefit) for income
  taxes.....................     19,746            45            (18,131)(i)             1,660
                                -------         -----           --------              --------
Income (loss) before minority
   interests and earnings from
   equity investments.......     22,550            66            (21,110)                1,506
Minority interests..........        (12)           --                 --                   (12)
Earnings from equity
   investments..............      2,333            --                 --                 2,333
                                -------         -----           --------              --------
Net income (loss)...........    $24,871         $  66           $(21,110)             $  3,827
                                =======         =====           ========              ========

(Table continued)



                                                                Pro Forma for
                                       Sierra                Recapitalization
                              -------------------------         & Sierra
                              Historical(c)  Adjustments        Acquisition(k)
                              ------------   -----------     ----------------
<S>                             <C>           <C>              <C>
Net sales...................    $21,145       $      --        $ 230,496
Cost of products sold and
   services provided........     12,354              --          141,370
Selling, general and
   administrative expenses..      7,326              --           45,738
Amortization of goodwill and
   other intangibles........        256             926(e)         2,547
                                -------       ---------        ---------
Operating income............      1,209            (926)          40,841
Other income................         --              --            1,441
Interest income.............         --              --               --
Interest expense............       (570)            570(b)      (38,759)
Loss from foreign currency,
  net.......................         --              --             (74)
                                ------        ---------        --------
Income (loss) before income
   taxes, minority interests a
   earnings from equity
   investments..............       639             (356)          3,449
Provision (benefit) for income
  taxes.....................       262              228(j)        2,150
                                ------        ---------        --------
Income (loss) before minority
   interests and earnings from
   equity investments.......       377             (584)          1,299
Minority interests..........        --               --             (12)
Earnings from equity
   investments..............        --               --           2,333
                                ------        ---------        --------
Net income (loss)...........    $  377        $    (584)       $  3,620
                                ======        =========        ========
</TABLE>

                                      P-10


<PAGE>



                        CHARLES RIVER LABORATORIES, INC.
                     NOTES TO UNAUDITED PRO FORMA CONDENSED
                       CONSOLIDATED STATEMENTS OF INCOME
                             (dollars in thousands)

(a)  Charles River's fiscal year consists of a twelve month period ending on the
     Saturday closest to December 31; the Company's nine month periods consist
     of the nine months ending on the Saturday closest to September 30.

(b)  Represents the financial results for the companies acquired during 1998 for
     the periods not included in the Company Historical column as follows:
     Tektagen (from January 1, 1998 until March 31, 1998), Therion (from January
     1, 1998 until March 31, 1998) and ESD (from January 1, 1998 until November
     30, 1998). The tables below detail these results for the year ended
     December 26, 1998 and the nine months ended September 26, 1998:

<TABLE>
                                                              For the Year Ended December 26, 1998
                                               -----------------------------------------------------------------
                                               Tektagen     Therion       ESD       Adjustments         Total
                                               --------     -------   -----------   -----------       ----------
<S>                                              <C>          <C>       <C>           <C>              <C>
Net sales....................................    $ 917        $310      $2,230        $    --          $ 3,457
Cost of products sold and services
   provided..................................      977          89       1,650             --            2,716
   Selling, general and administrative
     expenses................................      407          85         313             --              805
   Amortization of goodwill and other
   intangibles...............................       --          --          --            116(e)           116(e)
                                                 -----       -----      ------        -------         --------
Operating income.............................     (467)        136         267           (116)            (180)
Interest income..............................       --          --          --             --               --
Interest expense.............................      (23)         --          --             --              (23)
(Loss) gain from foreign currency, net.......       --          --          --             --               --
                                                 -----       -----      ------        -------         --------
(Loss) income before income taxes,
   minority interests and earnings from
   equity investments.....................        (490)        136         267           (116)            (230)
   Provision (benefit) for income taxes...          --          43         107             --              150
                                                 -----       -----      ------        -------         --------
(Loss) income before minority interests
   and earnings from equity investments...        (490)         93         160           (116)            (353)
   Minority interests.....................          --          --          --             --               --
                                                 -----       -----      ------        -------         --------
Earnings from equity investments.............       --           2          --             --                2
                                                 -----       -----      ------        -------         --------
Net (loss) income............................    $(490)      $  95      $  160        $  (116)        $   (351)
                                                 =====       =====      ======        =======         ========
</TABLE>


                                      P-11


<PAGE>



<TABLE>

                                                          For the Nine Months Ended September 26, 1998
                                               -----------------------------------------------------------------
                                               Tektagen     Therion       ESD       Adjustments         Total
                                               --------     -------   -----------   -----------       ----------
<S>                                             <C>         <C>         <C>          <C>              <C>
Net sales....................................  $ 917        $310        $1,757       $     --          $ 2,984
Cost of products sold and services
   provided..................................    977          89         1,370             --            2,436
Selling, general and administrative
   expenses..................................    407          85           231             --              723
Amortization of goodwill and other
   intangibles...............................     --          --            --            116(e)           116(e)
                                               -----        ----        ------       --------          -------
Operating income.............................   (467)        136           156           (116)            (291)
Interest income..............................     --          --            --             --               --
Interest expense.............................    (23)         --            --             --              (23)
Loss from foreign currency, net..............     --          --            --             --               --
                                                ----       -----         -----       --------          -------
(Loss) income before income taxes,
   minority interests and earnings from
   equity investments.......................    (490)        136           156          (116)             (314)
   Provision (benefit) for income taxes.....      --          43            62            --               105
                                                ----       -----         -----       -------           -------
(Loss) income before minority interests
   and earnings from equity investments.....    (490)         93            94          (116)             (419)
   Earnings from equity investments.........      --           2            --            --                 2
   Minority interests.......................      --          --            --            --                --
                                               -----       -----         -----       -------           -------
Net (loss) income...........................   $(490)      $  95         $  94       $  (116)          $  (417)
                                               =====       =====         =====       =======           =======
</TABLE>

(c)  Represents the historical unaudited consolidated financial results of
     Sierra. These results have been adjusted to reflect the results of
     operations for HTI Bio-Services, Inc., a company Sierra acquired in
     January 1999 for the periods not included in the Sierra historical
     results. The results also reflect related pro forma adjustments to
     goodwill amortization, interest and tax expense.

     As part of the Sierra Acquisition, the Company has agreed to pay up to
     $10,000 in performance-based bonus payments if certain financial
     objectives are reached over the next five years. At the time these
     contingencies are resolved, the bonuses, if any, will be recorded as
     compensation expense. As these amounts are not reasonably estimable, the
     expense related to those bonus payments has not been included in the pro
     forma financial statements.

     Also in conjunction with the Sierra Acquisition, the Company will enter
     into employment agreements with certain Sierra employees that contain
     retention and non-competition payments totaling $3,000 to be paid upon
     their continuing employment with the Company at December 31, 1999 and June
     30, 2001. The expense related to these payments has not been included in
     the pro forma financial statements as they are considered non-recurring.
     At the time these contingencies are resolved, the payments, if any, will
     be recorded as compensation expense.

(d)  To record the elimination of certain B&L allocated or specifically
     identified corporate costs to be replaced by management's estimate of the
     stand alone costs. The Company historically operated autonomously from
     B&L; therefore, the level of corporate charges was minimal. Management's
     estimates of stand alone costs include additional professional fees and
     other general and administrative expenses as shown below:

                                      P-12


<PAGE>



<TABLE>

                                                                 Nine Months    Nine Months      Twelve
                                                    Year Ended      Ended          Ended      Months Ended
                                                   December 26,  September 26,  September 25, September 25,
                                                       1998          1998          1999           1999
                                                   ------------  -------------  ------------- -------------
<S>                                                    <C>          <C>            <C>           <C>
Allocated or identified corporate costs:
   Professional services...........................    $   12        $   13         $   17        $   16
   Insurance.......................................     2,552         1,894          1,820         2,478
   Other general and administrative................        60            46            181           195
                                                       ------        ------         ------        ------
      Total........................................     2,624         1,953          2,018         2,689
                                                       ------        ------         ------        ------
Management's estimated stand alone costs:

   Professional services(1)........................       500           375            375           500
   Insurance.......................................     1,940         1,455          1,455         1,940
   Other general and administrative................       225           170            170           225
                                                       ------        ------         ------        ------
      Total........................................     2,665         2,000          2,000         2,665
                                                       ------        ------         ------        ------
      Net increase (decrease) in expenses..........    $   41        $   47         $  (18)       $  (24)
                                                       ======        ======         ======        ======
</TABLE>

- -------------------
     (1)  Include legal, financial and tax accounting and other professional
          expenses.

(e)  Reflects the incremental expense required to reflect amortization of
     goodwill generated in the 1998 Acquisitions and the Sierra Acquisition
     based on an estimated useful life of 15 years.

(f)  Reflects the elimination of interest income generated from cash and cash
     equivalents that, according to the terms of the Recapitalization Agreement,
     will not be a part of the ongoing operations of Charles River.

(g)  To adjust historical interest expense for that portion related to
     liabilities that, according to the Recapitalization Agreement, will be
     assumed by B&L and will therefore not be part of the ongoing operations of
     Charles River as well as adjustment to the unaudited pro forma consolidated
     interest expense as a result of the Transactions:

<TABLE>

                                                                    Nine Months   Nine Months      Twelve
                                                      Year Ended       Ended         Ended      Months Ended
                                                     December 26,  September 26, September 25, September 25,
                                                         1998          1998           1999          1999
                                                     ------------  ------------- ------------- -------------
<S>     <C>    <C>    <C>    <C>    <C>    <C>
Increase in interest expense
   Notes offered hereby(1)...........................  $20,203        $15,152       $17,222       $22,273
   Term loans(2).....................................   14,500         10,875        10,875        14,500
   Revolver(3).......................................      310            233           233           310
   Amortization of deferred financing costs(4).......    1,523          1,142         1,142         1,523
                                                       -------        -------       -------       -------
      Total(5).......................................   36,536         27,402        29,472        38,606
   Elimination of historical interest expense........     (257)          (192)          (99)         (164)
                                                       -------        -------       -------       -------
      Net increase in interest expense...............  $36,279        $27,210       $29,373       $38,442
                                                       =======        =======       =======       =======
</TABLE>

                                      P-13


<PAGE>



- -------------------
(1)  Interest expense was calculated at an effective interest rate of 13.66%.

(2)  Interest expense was calculated at an effective blended interest rate of
     9.06%, which is based upon a base rate or LIBOR plus a margin and is reset
     every six months.

(3)  Represents interest expense calculated at 8.50% plus fees on the unused
     portion of 0.50%.

(4)  Represents annual amortization expense utilizing a weighted average
     maturity on all borrowings of 8.70 years.

(5)  A 0.125% increase or decrease in the effective weighted average interest
     rate for the senior credit facilities would change pro forma interest
     expense by $203, $152 and $152 for the fiscal year ended December 26, 1998
     and the nine months ended September 26, 1998 and September 25, 1999,
     respectively.

(h)  To eliminate Sierra's historical interest expense related to debt that,
     according to the terms of the Sierra stock purchase agreement, will be
     repaid.

(i)  Represents the income tax adjustment required to result in a pro forma
     income tax provision based on: (i) Charles River's historical tax provision
     using historical amounts and (ii) the direct tax effects of the pro forma
     adjustments described above.

(j)  Represents the income tax adjustment required to result in a pro forma
     income tax provision based on: (i) Sierra's historical tax provision using
     historical amounts and (ii) the direct tax effects of the pro forma
     adjustments described above.

(k)  Information for the twelve months ended September 25, 1999 represents the
     sum of the unaudited pro forma fiscal year ended December 26, 1998 and the
     unaudited pro forma nine months ended September 25, 1999, less the
     unaudited pro forma nine months ended September 26, 1998.

                                      P-14


<PAGE>



                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS



                                                                            Page
                                                                            ----

Charles River Laboratories, Inc.

Report of Independent Accountants.......................................... F-2
Consolidated Statements of Income for the years ended December 28, 1996,
   December 27, 1997 and December 26, 1998................................. F-3
Consolidated Balance Sheets as of December 27, 1997 and December 26, 1998.. F-4
Consolidated Statement of Cash Flows for the years ended December 28, 1996,
   December 27, 1997 and December 26, 1998 ................................ F-5
Consolidated Statement of Changes in Shareholder's Equity for the years
   ended December 30, 1995, December 28, 1996, December 27, 1997 and
   December 26, 1998....................................................... F-7
Notes to Consolidated Financial Statements................................. F-8
Consolidated Statements of Income for the nine months ended September 26,
   1998 and September 25, 1999 (unaudited)................................. F-24
Consolidated Balance Sheet as of September 25, 1999 (unaudited)............ F-25
Consolidated Statements of Cash Flows for the nine months ended
   September 26, 1998 and September 25, 1999 (unaudited)................... F-26
Notes to Interim Consolidated Financial Statements (unaudited)............. F-28

                                       F-1

<PAGE>

                        Report of Independent Accountants


To the Board of Directors of
Charles River Laboratories, Inc.

     In our opinion, the accompanying consolidated balance sheets and the
related consolidated statements of income, changes in shareholder's equity and
cash flows present fairly, in all material respects, the financial position of
Charles River Laboratories, Inc. and its subsidiaries (the "Company") at
December 26, 1998 and December 27, 1997, and the results of their operations and
their cash flows for each of the three years in the period ended December 26,
1998, in conformity with generally accepted accounting principles. These
financial statements are the responsibility of the Company's management; our
responsibility is to express an opinion on these financial statements based on
our audits. We conducted our audits of these statements in accordance with
generally accepted auditing standards which require that we plan and perform the
audit to obtain reasonable assurance about whether the financial statements are
free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements,
assessing the accounting principles used and significant estimates made by
management, and evaluating the overall financial statement presentation. We
believe that our audits provide a reasonable basis for the opinion expressed
above.

PricewaterhouseCoopers LLP
Boston, Massachusetts

June 30, 1999,
except as to Note 2, which is as of September 29, 1999

                                       F-2

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
                        CONSOLIDATED STATEMENTS OF INCOME
                             (dollars in thousands)

<TABLE>

                                                                                   Fiscal Year Ended
                                                                        --------------------------------------
                                                                        December 28, December 27, December 26,
                                                                            1996         1997         1998
                                                                        ------------ ------------ ------------
<S>                                                                     <C>          <C>          <C>
Net sales...............................................................  $155,604     $170,713     $193,301
Costs and expenses
   Cost of products sold and services provided..........................    97,777      111,460      122,547
   Selling, general and administrative..................................    28,327       30,451       34,142
   Amortization of goodwill and intangibles.............................       610          834        1,287
   Restructuring charges................................................     4,748        5,892           --
                                                                           -------      -------      -------
Operating income........................................................    24,142       22,076       35,325
Other income (expense)
   Interest income......................................................       654          865          986
   Interest expense.....................................................      (491)        (501)        (421)
   Gain/(loss) from foreign currency, net...............................        84         (221)         (58)
                                                                           -------      -------      -------
Income before income taxes, minority interests and earnings
   from equity investments..............................................    24,389       22,219       35,832
Provision for income taxes..............................................    10,889        8,499       14,123
                                                                           -------      -------      -------
Income before minority interests and earnings from equity investments...    13,500       13,720       21,709
Minority interests......................................................        (5)         (10)         (10)
Earnings from equity investment.........................................     1,750        1,630        1,679
                                                                           -------      -------      -------
Net income..............................................................   $15,245      $15,340      $23,378
                                                                           =======      =======      =======
</TABLE>

                 See Notes to Consolidated Financial Statements.

                                       F-3

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
                           CONSOLIDATED BALANCE SHEETS
                             (dollars in thousands)

<TABLE>
                                                                               December 27, December 26,
                                                                                   1997         1998
                                                                               ------------ ------------
Assets
   Current assets
<S>                                                                            <C>          <C>
      Cash and cash equivalents................................................   $17,915      $24,811
      Trade receivables, less allowances of $688 and $898, respectively........    28,280       32,466
      Inventories..............................................................    28,904       30,731
      Deferred income taxes....................................................     4,751        5,432
      Due from affiliates......................................................     1,153          982
      Other current assets.....................................................     2,320        2,792
                                                                                  -------      -------
        Total current assets...................................................    83,323       97,214
   Property, plant and equipment, net..........................................    76,889       82,690
   Goodwill and other intangibles, less accumulated amortization of $4,356
      and $5,591 respectively..................................................     8,621       17,705
   Investments in affiliates...................................................    16,140       18,470
   Other assets................................................................    11,238       17,331
                                                                                  -------      -------
        Total assets...........................................................  $196,211     $233,410
                                                                                  =======      =======

Liabilities and Shareholder's Equity
   Current liabilities
      Current portion of long-term debt........................................       $83         $202
      Current portion of capital lease obligations.............................       144          188
      Accounts payable.........................................................     7,566       11,615
      Accrued compensation.....................................................     8,601        9,972
      Accrued ESLIRP...........................................................     4,407        5,160
      Deferred income..........................................................     1,339        3,419
      Accrued restructuring....................................................     2,732        1,113
      Accrued liabilities......................................................     8,282       13,794
      Accrued income taxes.....................................................     8,423       14,329
                                                                                  -------      -------
        Total current liabilities..............................................    41,577       59,792
   Long-term debt..............................................................       170          248
   Capital lease obligations...................................................       966          944
   Other long-term liabilities.................................................     3,844        3,861
                                                                                  -------      -------
        Total liabilities......................................................    46,557       64,845
                                                                                  -------      -------
   Commitments and contingencies (Note 12)
   Minority interests..........................................................       290          306
   Shareholder's equity
      Common stock, par value $1 per share, 1,000 shares issued................         1            1
      Capital in excess of par value...........................................    17,836       17,836
      Retained earnings........................................................   140,320      156,776
      Accumulated other comprehensive income...................................    (8,793)      (6,354)
                                                                                  -------      -------
        Total shareholder's equity.............................................   149,364      168,259
                                                                                  -------      -------
        Total liabilities and shareholder's equity.............................  $196,211     $233,410
                                                                                  =======      =======
</TABLE>


                 See Notes to Consolidated Financial Statements.

                                       F-4

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                             (dollars in thousands)

<TABLE>

                                                                                      Fiscal Year Ended
                                                                           --------------------------------------
                                                                           December 28, December 27, December 26,
                                                                               1996         1997         1998
                                                                           ------------ ------------ ------------
<S>                                                                        <C>          <C>          <C>

Cash flows relating to operating activities
   Net income..............................................................    $15,245      $15,340      $23,378
   Adjustments to reconcile net income to net cash provided by operating
      activities:
      Depreciation and amortization........................................      9,528        9,703       10,895
      Provision for doubtful accounts......................................         81          166          181
      Earnings from equity investments.....................................     (1,750)      (1,630)      (1,679)
      Minority interests...................................................          5           10           10
      Deferred income taxes................................................     (5,693)      (1,363)      (3,133)
      Stock compensation expense...........................................         24           84          333
      Property, plant and equipment write downs............................         --          822           --
   Changes in assets and liabilities

      Trade receivables....................................................     (1,840)      (2,232)      (1,712)
      Inventories..........................................................     (1,552)      (1,917)      (1,250)
      Due from affiliates..................................................       (845)        (462)         538
      Other current assets.................................................        133          165         (241)
      Other assets.........................................................     (1,787)         611       (4,990)
      Accounts payable.....................................................       (180)         594        2,853
      Accrued compensation.................................................       (347)         674        2,090
      Accrued ESLIRP.......................................................        674          499          821
      Deferred income......................................................        (62)         105        1,278
      Accrued restructuring................................................         --        2,732       (1,619)
      Accrued liabilities..................................................      1,705          431        3,970
      Accrued income taxes.................................................      6,852         (500)       5,605
      Other long-term liabilities..........................................        354         (148)        (629)
                                                                                ------       ------       ------
        Net cash provided by operating activities..........................     20,545       23,684       36,699
                                                                                ------       ------       ------
Cash flows relating to investing activities
   Dividends received from equity investments..............................        725          773          681
   Capital expenditures....................................................    (11,572)     (11,872)     (11,909)
   Cash paid for acquisition of businesses.................................       (831)      (1,207)     (11,121)
                                                                                ------       ------       ------
        Net cash used in investing activities..............................    (11,678)     (12,306)     (22,349)
                                                                                ------       ------       ------
Cash flows relating to financing activities
   Long-term debt..........................................................     (3,677)         162       (1,048)
   Capital lease obligations...............................................       (194)        (346)         (48)
   Net activity with Bausch & Lomb.........................................       (197)     (12,755)      (6,922)
                                                                                 -----        -----        -----
        Net cash used in financing activities..............................     (4,068)    ( 12,939)      (8,018)
                                                                                 -----        -----        -----
Effect of exchange rate changes on cash and cash equivalents...............       (478)        (181)         564
                                                                                 -----        -----        -----
Net change in cash and cash equivalents....................................      4,321       (1,742)       6,896
Cash and cash equivalents, beginning of year...............................     15,336       19,657       17,915
                                                                                 -----        -----        -----


                 See Notes to Consolidated Financial Statements.

                                       F-5

<PAGE>


<CAPTION>

                                                                                      Fiscal Year Ended
                                                                           --------------------------------------
                                                                           December 28, December 27, December 26,
                                                                               1996         1997         1998
                                                                           ------------ ------------ ------------
<S>                                                                        <C>          <C>          <C>

Cash and cash equivalents, end of year.....................................    $19,657      $17,915      $24,811
                                                                                ======       ======       ======
Supplemental cash flow information
   Cash paid for taxes.....................................................     $4,821       $4,254       $4,681
   Cash paid for interest..................................................        414          287          177
</TABLE>

                 See Notes to Consolidated Financial Statements.

                                       F-6

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
           CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDER'S EQUITY
                             (dollars in thousands)

<TABLE>

                                                                               Accumulated
                                                                                  Other                  Capital
                                                                   Retained   Comprehensive    Common   In Excess
                                                         Total     Earnings       Income       Stock      of Par
                                                         -----     --------   -------------    ------   ---------
<S>                                                    <C>         <C>        <C>              <C>      <C>
Balance at December 30, 1995........................   $142,537    $122,687        $2,013       $  1      $17,836
   Components of comprehensive income:
      Net income....................................     15,245      15,245            --         --           --
      Foreign currency translation..................     (3,467)         --        (3,467)        --           --
      Minimum pension liability adjustment..........         15          --            15         --           --
                                                        -------
        Total comprehensive income..................     11,793
                                                        -------         --             --         --           --
   Net activity with Bausch & Lomb..................       (197)       (197)           --         --           --
                                                        -------     -------        ------      -----       ------
Balance at December 28, 1996........................   $154,133    $137,735       $(1,439)        $1      $17,836
   Components of comprehensive income:
      Net income....................................     15,340      15,340            --         --           --
      Foreign currency translation..................     (6,844)         --        (6,844)        --           --
      Minimum pension liability adjustment..........       (510)         --          (510)                     --
                                                        -------
        Total comprehensive income..................      7,986
                                                        -------          --            --         --           --
   Net activity with Bausch & Lomb..................    (12,755)    (12,755)           --         --           --
                                                        -------     -------        ------      -----       ------
Balance at December 27, 1997........................   $149,364    $140,320       $(8,793)        $1      $17,836
   Components of comprehensive income:
      Net income....................................     23,378      23,378            --         --           --
      Foreign currency translation..................      2,839          --         2,839         --           --
      Minimum pension liability adjustment..........       (400)         --          (400)                     --
                                                        -------
        Total comprehensive income..................     25,817
                                                        -------          --            --         --           --
   Net activity with Bausch & Lomb..................     (6,922)     (6,922)           --         --           --
                                                        -------     -------        ------      -----       ------
Balance at December 26, 1998........................   $168,259    $156,776       $(6,354)        $1      $17,836
                                                        =======     =======        ======      =====       ======
</TABLE>

                 See Notes to Consolidated Financial Statements.

                                       F-7

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                             (dollars in thousands)

1.   Description of Business and Summary of Significant Accounting Policies

   Description of Business

     Charles River Laboratories, Inc. (the "Company") is a commercial producer
and supplier of animal research models for use in the discovery, development and
testing of pharmaceuticals. In addition, the Company is a supplier of biomedical
products and services in several specialized niche markets. The Company is a
100% owned subsidiary of Bausch & Lomb Incorporated (Bausch & Lomb). The
Company's fiscal year is the twelve month period ending the last Saturday in
December.

   Basis of Presentation

     As of the dates and for the periods presented in these financial
statements, the assets, liabilities, operations and cash flows relating to the
Company are held by Bausch & Lomb and certain affiliated entities. As more fully
described in Note 2, effective September 29, 1999, the Company consummated a
recapitalization agreement that provides for the contribution of all such
assets, liabilities and operations to an existing dormant subsidiary which was
subsequently renamed CRL Holdings, Inc. These consolidated financial statements
include all such assets, liabilities, operations and cash flows as of and for
each of the periods presented.

   Principles of Consolidation

     The financial statements include all majority-owned U.S. and non-U.S.
subsidiaries. Intercompany accounts, transactions and profits are eliminated.
Affiliated companies over which the Company does not have the ability to
exercise control are accounted for using the equity method (Note 11).

   Use of Estimates

     The financial statements have been prepared in conformity with generally
accepted accounting principles and, as such, include amounts based on informed
estimates and judgments of management with consideration given to materiality.
Actual results could differ from those estimates.

   Cash and Cash Equivalents

     Cash equivalents include time deposits and highly liquid investments with
remaining maturities at the purchase date of three months or less.

   Inventories

     Inventories are stated at the lower of cost or market. Cost is determined
principally on the average cost method. All inventories have been reduced to
their net realizable value. Costs for primates are accumulated in inventory
until certain primates are sold or declared breeders.

   Property, Plant and Equipment

     Property, plant and equipment, including improvements that significantly
add to productive capacity or extend useful life, are recorded at cost, while
maintenance and repairs are expensed as incurred. Depreciation is calculated for
financial reporting purposes using the straight-line method based on the
estimated useful lives of the assets as follows: building, 20 to 40 years;
machinery and equipment, 2 to 20 years; and leasehold improvements, shorter of
estimated useful life or the lease periods.

                                       F-8

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


   Intangible Assets

     Intangible assets are amortized on a straight-line basis over periods
ranging from eight to 20 years. Intangible assets consist primarily of goodwill,
patents and non-compete agreements.

   Other Assets

     Other assets consist primarily of the cash surrender value of life
insurance net long-term deferred tax assets and the net value of primate
breeders. The value of primate breeders is amortized over 20 years. Total
amortization expense for primate breeders was $378, $348 and $323 in 1996, 1997
and 1998 and is included in costs of products sold and services provided.

   Impairment of Long-Lived Assets

     The Company evaluates long-lived assets and intangibles whenever events or
changes in circumstances indicate that the carrying amount of an asset may not
be recoverable. An impairment loss would be recognized when estimated
undiscounted future cash flows expected to result from the use of the asset and
its eventual disposal are less than its carrying amount. In such instances, the
carrying value of long-lived assets is reduced to the estimated fair value, as
determined using an appraisal or discounted cash flow, as appropriate.

   Stock-Based Compensation Plans

     As permitted under Statement of Financial Accounting Standards No. 123,
"Accounting for Stock-Based Compensation" (FAS 123), the Company accounts for
its stock-based compensation plans using the intrinsic value method prescribed
by Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued to
Employees" (APB 25).

   Revenue Recognition

     Revenues are recognized when products are shipped, services performed or
upon submission of a lab report for laboratory services. Deferred income
represents cash received in advance of delivery of primates from customers under
contract and is recognized at time of delivery.

   Fair Value of Financial Instruments

     The carrying amount of the Company's significant financial instruments,
which includes accounts receivable and debt, approximate their fair values at
December 26, 1998 and December 27, 1997.

   Income Taxes

     As of December 26, 1998, the Company was not a separate taxable entity for
federal, state or local income tax purposes and its results of operations were
included in the consolidated Bausch & Lomb tax returns. The Company accounts for
income taxes under the separate return method in accordance with Statement of
Financial Accounting Standards No. 109, "Accounting for Income Taxes" (FAS 109).

   Foreign Operations

                                       F-9

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


     The financial statements of all non-U.S. subsidiaries are translated into
U.S. dollars as follows: assets and liabilities at year-end exchange rates;
income, expenses and cash flows at average exchange rates; and shareholder's
equity at historical exchange rates. The resulting translation adjustment is
recorded as a component of accumulated other comprehensive income on the
accompanying balance sheet.

   Concentrations of Credit Risk

     Financial instruments that potentially subject the Company to
concentrations of credit risk consist primarily of trade receivables from
customers within the pharmaceutical and biomedical industries. As these
industries have experienced significant growth and its customers are
predominantly well-established and viable, the Company believes its exposure to
credit risk to be minimal.

   Comprehensive Income

     The Company adopted Statement of Financial Accounting Standards No. 130,
"Reporting Comprehensive Income," (FAS 130) at the beginning of 1998. As it
relates to the Company, comprehensive income is defined as net income plus the
sum of currency translation adjustments and the change in minimum pension
liability (collectively, other comprehensive income), and is presented in the
Consolidated Statement of Changes in Shareholder's Equity.

   Segment Reporting

     During 1998, the Company adopted Statement of Financial Accounting
Standards No. 131, "Disclosures About Segments of an Enterprise and Related
Information" (FAS 131), which requires financial and descriptive information
about an enterprise's reportable operating segments. Operating segments are
components of an enterprise about which separate financial information is
available and regularly evaluated by the chief operating decision maker in
deciding how to allocate resources and in assessing performance. The Company
operates in two business segments, research models and biomedical products and
services.

   Reclassifications

     Certain amounts in prior year financial statements and related notes have
been changed to conform with current year presentation.

2.   Subsequent Events

     On September 29, 1999 CRL Acquisition LLC, an affiliate of DLJ Merchant
Banking Partners II, L.P., consummated a transaction in which it acquired 87.5%
of the common stock of Charles River Laboratories, Inc. from Bausch & Lomb for
approximately $443 million. This transaction was effected through Charles River
Laboratories Holdings, Inc. ("Holdings"), a holding company with no operations
or assets other than its ownership of 100% of the Company's outstanding stock.
This transaction will be accounted for as a leveraged recapitalization, which
will have no impact on the historical basis of the Company's assets and
liabilities. In addition, concurrent with the transaction, the Company purchased
all of the outstanding shares of common stock of SBI Holdings, Inc. ("Sierra"),
a pre-clinical biomedical services company, for $24.0 million. This acquisition
will be accounted for as a purchase business combination with the operating
results of Sierra being included in the Company's consolidated operating results
beginning on the effective date of the acquisition. These transactions are
hereafter referred to as the "Acquisitions".

     The Acquisitions and related transaction fees and expenses were funded as
follows:

                                      F-10

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)



      o  issuance of 150,000 units, each consisting of a $1,000 principal amount
         of 13.5% senior subordinated note (the Series A Note Offering) and one
         warrant to purchase 3.942 shares of common stock of Holdings;

      o  borrowings by the Company of $162.0 million under a new senior secured
         credit facility;

      o  an equity investment of $92.4 million in Holdings;

      o  senior discount debentures with warrants issued by Holdings for $37.6
         million; and

      o  subordinated discount note issued by Holdings to Bausch & Lomb for
         $43.0 million.

     The Series A Note Offering (the "Notes") will mature on October 1, 2009.
The Notes will not be redeemable at the issuers' option prior to October 1,
2004. Thereafter, the Notes will be subject to redemption at any time at the
option of the issuer at redemption prices set forth in the Notes. Interest on
the Notes will accrue at the rate of 13.5% per annum and will be payable
semi-annually in arrears on October 1 and April 1 of each year, commencing on
April 1, 2000. The payment of principal and interest on the Notes will be
subordinated in right to the prior payment of all Senior Debt, as defined. The
senior secured credit facility includes a $40 million term loan A facility, a
$120 million term loan B facility and a $30 million revolving credit facility.
The term loan A facility will mature on October 1, 2005, the term loan B
facility will mature on October 1, 2007 and the revolving credit facility will
mature on October 1, 2005. Interest on the term loan A, term loan B and
revolving credit facility will accrue at either a base rate plus 1.75% or LIBOR
plus 3.0%, at the Company's option (8.5%, 9.25% and 8.5%, respectively, at
September 29, 1999) per annum and will be paid quarterly in arrears commencing
on December 30, 1999. A commitment fee in an amount equal to 0.50% per annum on
the daily average unused portion of the revolving credit facility will be paid
quarterly in arrears. Upon the occurrence of a change in control, as defined,
the issuer will be obligated to make an offer to each holder of the Notes to
repurchase all or any part of such holders' Notes at an offer price in cash
equal to 101% of the principal amount thereof, plus accrued and unpaid interest.
Restrictions under the Notes include certain sales of assets, certain payments
of dividends and incurrence of debt, and limitations on certain mergers and
transactions with affiliates. With respect to the Notes and the senior secured
credit facility, the Company will be required to maintain certain financial
ratios and covenants.

3.   Restructuring Charges and Asset Impairments

     In June 1996 and April 1997, the Bausch & Lomb board of directors approved
plans to restructure portions of the Company. As a result, pre-tax restructuring
charges of $4,748 and $5,892 were recorded in 1996 and 1997, respectively. The
major components of the plans are summarized in the table below:

                                                          1996       1997
                                                         ------     ------
Employee separations..................................   $2,283     $3,200
Asset writedowns......................................    1,631      2,157
Other.................................................      834        535
                                                          -----      -----
                                                         $4,748     $5,892
                                                          =====      =====

     These restructuring efforts have reduced the Company's fixed cost structure
and realigned the business to meet its strategic objectives through the closure,
relocation and consolidation of breeding, distribution, sales and administrative
operations, and workforce reductions. Certain severance costs are being paid
over periods greater than one year. Further, the Company is under a court order
issued in June 1997 to relocate a portion of its primate operations from two

                                      F-11

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


islands located in the Florida Keys to Miami, Florida. Also, the Company is
required to refoliate the islands due to damage caused by the primates. Due to
complications arising within the plan to relocate the primates, the relocation
has taken longer than anticipated to complete, as the primates needed to be
moved in a controlled manner in order to minimize mortality and breeding
disruption. Asset writedowns relate primarily to the closing of facilities and
losses resulting from equipment dispositions. Other charges included
miscellaneous costs and other commitments.

     The following table sets forth the activity in the restructuring reserves
through December 26, 1998:
                                                      Restructuring Programs
                                                   ----------------------------
                                                   1996       1997        Total
                                                   ----       ----        -----
Restructuring provision........................   $4,748         --      $4,748
Cash payments..................................   (3,117)        --      (3,117)
Asset write-downs..............................   (1,631)        --      (1,631)
                                                   -----      -----       -----
   Balance, December 28, 1996..................       --         --          --
Restructuring provision........................       --      5,892       5,892
Cash payments .................................       --     (1,725)     (1,725)
Asset write-downs..............................       --     (1,435)     (1,435)
                                                   -----      -----       -----
   Balance, December 27, 1997..................       --      2,732       2,732
Cash payments..................................       --       (897)       (897)
Asset write-downs..............................       --       (722)       (722)
                                                   -----      -----       -----
   Balance, December 26, 1998..................   $   --     $1,113      $1,113
                                                   =====      =====       =====


     Reserves remaining at December 26, 1998 primarily represent liabilities for
continuing severance payments and relocation and refoliation costs. The
remaining balance of $1,113 is expected to be fully utilized by the end of 1999.

4.   Supplemental Balance Sheet Information

     The composition of inventories is as follows:


                                                      December 27,  December 26,
                                                          1997          1998
                                                      ------------  ------------
Raw materials and supplies...........................    $ 5,222      $ 4,932
Work in process......................................        379        1,088
Finished products....................................     23,303       24,711
                                                           -----        -----
   Inventories.......................................    $28,904      $30,731
                                                           =====        =====


                                      F-12

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


     The composition of property, plant and equipment is as follows:


                                                      December 27,  December 26,
                                                          1997          1998
                                                      ------------  ------------
Land.................................................    $ 7,473     $  7,783
Buildings............................................     82,963       90,919
Machinery and equipment..............................     63,192       74,876
Leasehold improvements...............................      1,033        3,063
Furniture and fixtures...............................      1,383        1,532
Vehicles.............................................      2,864        3,006
Construction in progress.............................      8,483        6,176
                                                         -------      -------
                                                         167,391      187,355
Less accumulated depreciation........................    (90,502)    (104,665)
                                                         -------      -------
   Net property, plant and equipment.................   $ 76,889     $ 82,690
                                                         =======      =======


5.   Long-Term Debt

     The Company has various debt instruments outstanding at its international
subsidiaries aggregating $253 and $450 at December 27, 1997 and December 26,
1998, respectively, with interest rates ranging from 3% to 15.2% and maturities
ranging from September 1999 through June 2003.

6.   Leases

   Capital Leases

     The Company has one capital lease for a building and three capital leases
for equipment. These leases are capitalized using interest rates considered
appropriate at the inception of each lease. Following is an analysis of assets
under capital lease:


                                                      December 27,  December 26,
                                                          1997          1998
                                                      ------------  ------------
Building.............................................     $2,001       $2,001
Equipment............................................        179          179
Accumulated depreciation.............................     (1,213)      (1,457)
                                                           -----        -----
                                                          $  967       $  723
                                                           =====        =====


                                      F-13

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


     Capital lease obligations amounted to $1,110 and $1,132 at December 27,
1997 and December 26, 1998, respectively, with maturities through 2003 at
interest rates ranging from 8.6% to 9.3%. Future minimum lease payments under
capital lease obligations at December 26, 1998 are as follows:

          1999.........................................................$  282
          2000.........................................................   282
          2001.........................................................   282
          2002.........................................................   282
          2003.........................................................   534
                                                                        -----
          Total minimum lease payments................................. 1,662
          Less amount representing interest............................  (530)
                                                                        -----
          Present value of net minimum lease payments..................$1,132
                                                                        =====

     Operating Leases

     The Company has various operating leases for machinery and equipment,
automobiles, office equipment, land and office space. Rent expense for all
operating leases was $2,944 in 1996, $3,111 in 1997 and $3,273 in 1998. Future
minimum payments by year and in the aggregate, under noncancellable operating
leases with initial or remaining terms of one year or more consist of the
following at December 26, 1998:

          1999.........................................................$3,182
          2000......................................................... 2,932
          2001......................................................... 1,994
          2002......................................................... 1,088
          2003.........................................................   488
          Thereafter................................................... 1,690
                                                                       ------
                                                                      $11,374
                                                                       ======

7.   Income Taxes

     An analysis of the components of income before income taxes and minority
interests and the related provision for income taxes is presented below:

     <TABLE>

                                                                         Fiscal Year Ended
                                                               --------------------------------------
                                                               December 28, December 27, December 26,
                                                                   1996         1997         1998
                                                               ------------ ------------ ------------
<S>                                                            <C>          <C>          <C>
Income before equity in earnings of foreign subsidiaries,
   income taxes and minority interests
   U.S........................................................    $15,422      $13,497      $22,364
   Non-U.S....................................................      8,967        8,722       13,468
                                                                   ------       ------       ------
                                                                  $24,389      $22,219      $35,832
                                                                   ======       ======       ======

                                      F-14

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)

<CAPTION>

                                                                         Fiscal Year Ended
                                                               --------------------------------------
                                                               December 28, December 27, December 26,
                                                                   1996         1997         1998
                                                               ------------ ------------ ------------
<S>                                                            <C>          <C>          <C>
Income tax provision
   Current:
      Federal.................................................    $ 5,506      $ 6,202      $ 7,730
      Foreign.................................................      4,217        2,528        6,171
      State and local.........................................      1,406        1,397        1,833
                                                                   ------       ------       ------
        Total current.........................................     11,129       10,127       15,734
                                                                   ------       ------       ------
   Deferred:
      Federal.................................................       (496)      (1,867)        (597)
      Foreign.................................................        376          498         (887)
      State...................................................       (120)        (259)        (127)
                                                                   ------       ------       ------
        Total deferred........................................       (240)      (1,628)      (1,611)
                                                                   ------       ------       ------
                                                                  $10,889       $8,499      $14,123
                                                                   ======       ======       ======
</TABLE>

     Deferred taxes, detailed below, recognize the impact of temporary
differences between the amounts of assets and liabilities recorded for financial
statement purposes and such amounts measured in accordance with tax laws.
Realization of benefit for net operating losses and foreign tax credit
carryforwards, which expire between 2002 and 2011, is contingent on future
taxable earnings. A valuation allowance has been recorded for foreign tax
credits, which may not be realized.

<TABLE>
                                                             December 27, 1997       December 26, 1998
                                                            --------------------    --------------------
                                                            Assets   Liabilities    Assets   Liabilities
                                                            ------   -----------    ------   -----------
<S>                                                         <C>      <C>            <C>      <C>
Current:
   Inventories...........................................   $  588          --      $  827          --
   Restructuring accruals................................    1,584          --       1,006          --
   Employee benefits and compensation....................    2,023          --       3,077          --
   Other accruals........................................      556          --         522          --
                                                             -----       -----      ------       -----
                                                             4,751          --       5,432          --
                                                             -----       -----      ------       -----

Non-current:
   Net operating loss and credit carryforwards...........    1,776                   2,960
   Depreciation and amortization.........................    3,326       1,723       3,672         836
   Valuation allowance on foreign tax credits............   (1,776)                 (1,766)
      Other..............................................      654          --         921          --
                                                             -----       -----      ------       -----
                                                             3,980       1,723       5,787         836
                                                             -----       -----      ======       =====
                                                            $8,731      $1,723     $11,219        $836
                                                             =====       =====      ======       =====
</TABLE>

     Reconciliations of the statutory U.S. federal income tax rate to effective
tax rates are as follows:


                                      F-15

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


<TABLE>
                                                                      Fiscal Year Ended
                                                           ---------------------------------------
                                                           December 28, December 27,  December 26,
                                                               1996         1997          1998
                                                           ------------ ------------  ------------
<S>                                                        <C>          <C>           <C>
Tax at statutory U.S. tax rate.............................    35.0%        35.0%         35.0%
Foreign tax rate differences...............................     6.0         (0.1)          1.6
Non-deductible goodwill amortization.......................     0.3          0.4           0.6
State income taxes, net of federal tax benefit.............     3.4          3.3           3.1
Other......................................................    (0.6)        (0.4)         (0.8)
                                                               ----         ----          ----
                                                               44.1%        38.2%         39.5%
                                                               ====         ====          ====
</TABLE>


     The Company's foreign subsidiaries have undistributed earnings at December
26, 1998. Those earnings are considered to be indefinitely reinvested and,
accordingly, no provision for U.S. federal and state income taxes has been
provided thereon. Upon distribution of those earnings in the form of dividends
or otherwise, the Company would be subject to both U.S. income taxes (subject to
an adjustment for foreign tax credits) and withholding taxes payable to the
various foreign countries. Determination of the amount of unrecognized deferred
U.S. income tax liability is not practicable because of the complexities
associated with its hypothetical calculation.

8.   Employee Benefits

     The Company sponsors one defined contribution plan and two defined benefit
plans. The Company's defined contribution plan ("Charles River Laboratories
Employee Savings Plan") qualifies under section 401(k) of the Internal Revenue
Code. It covers substantially all U.S. employees and contains a provision
whereby the Company matches two percent of employee contributions up to four
percent. The costs associated with the defined contribution plan totaled $395,
$416 and $498 in 1996, 1997, and 1998, respectively.

     One of the Company-sponsored defined benefit plans (Charles River
Laboratories, Inc. Pension Plan) is a qualified, non-contributory plan that also
covers substantially all U.S. employees. Benefits are based on participants'
final average monthly compensation and years of service. Participants' rights
vest upon completion of five years of service.

     Under another defined benefit plan, the Company provides certain executives
with supplemental retirement benefits. This plan (Executive Supplemental Life
Insurance Retirement Plan or ESLIRP) is generally unfunded and non-qualified
under the provisions of the Employee Retirement Income Securities Act of 1974.

     The following table provides reconciliations of the changes in benefit
obligations, fair value of plan assets and funded status of the two defined
benefit plans.

<TABLE>

                                                                    Pension Benefit Plans
                                                                    ---------------------
                                                                     1997           1998
                                                                    ------         ------
<S>                                                                 <C>            <C>
Reconciliation of benefit obligation
   Benefit/obligation at beginning of year........................  $17,570        $20,531
   Service cost...................................................      804            795
   Interest cost..................................................    1,413          1,588
   Benefit payments...............................................     (710)          (742)
   Actuarial loss.................................................    1,454          2,940
                                                                     ------         ------
   Benefit/obligation at end of year..............................  $20,531        $25,112
                                                                     ======         ======
Reconciliation of fair value of plan assets


                                      F-16

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)
<CAPTION>

                                                                   Pension Benefit Plans
                                                                    ---------------------
                                                                     1997           1998
                                                                    ------         ------
<S>                                                                 <C>            <C>
   Fair value of plan assets at beginning of year.................  $17,394        $19,237
   Actual return on plan assets...................................    2,328          7,773
   Employer contributions.........................................      225            225
   Benefit payments...............................................     (710)          (742)
                                                                     ------         ------
   Fair value of plan assets at end of year.......................  $19,237        $26,493
                                                                     ======         ======
Funded status
   Funded status at beginning of year.............................  $(1,294)       $ 1,380
   Unrecognized transition obligation.............................      705            564
   Unrecognized prior-service cost................................      (31)           (27)
   Unrecognized gain..............................................   (4,331)        (7,178)
                                                                     ------         ------
   Accrued benefit (cost).........................................  $(4,951)       $(5,261)
                                                                     ======         ======
Amounts recognized in the consolidated balance sheet
   Accrued benefit cost...........................................  $(6,945)       $(7,849)
   Intangible asset...............................................      358            286
   Accumulated other comprehensive income.........................      982          1,381
                                                                     ------         ------
   Net amount recognized..........................................  $(5,605)       $(6,182)
                                                                     ======         ======
</TABLE>

     Key weighted-average assumptions used in the measurement of the Company's
benefit obligations are shown in the following table:


                                                   Fiscal Year Ended
                                        ---------------------------------------
                                        December 28, December 27,  December 26,
                                            1996         1997          1998
                                        ------------ ------------  ------------
Discount rate...........................    7.75%         7.5%            7%
Expected return on plan assets..........      10%          10%           10%
Rate of compensation increase...........     5.0%        4.75%         4.75%


          The following table provides the components of net periodic benefit
cost for the two defined benefit plans for 1996, 1997 and 1998:


                                                       Defined Benefit Plans
                                                    ---------------------------
                                                     1996      1997       1998
                                                    ------    ------     ------
Components of net periodic benefit cost
Service cost......................................  $  690     $  804    $  795
Interest cost.....................................   1,236      1,413     1,588
Expected return on plan assets....................  (1,463)    (1,717)   (1,901)
Amortization of transition obligation.............     141        141       141
Amortization of prior-service cost................      (3)        (3)       (3)
Amortization of net gain..........................    (189)      (172)      (85)
                                                     -----      -----     -----
Net periodic benefit cost.........................  $  412     $  466    $  535
                                                     =====      =====     =====

                                      F-17

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


     The projected benefit obligation, accumulated benefit obligation, and fair
value of plan assets for the pension plan with accumulated benefit obligations
in excess of plan assets were $6,752, $6,409 and $0, respectively, as of
December 27, 1997, and $8,205, $7,745 and $0, respectively, as of December 26,
1998.

     The Company had an adjusted minimum pension liability of $1,636 ($982, net
of tax) and $2,302 ($1,381, net of tax) as of December 27, 1997 and December 26,
1998, which represented the excess of the minimum accumulated net benefit
obligation over previously recorded pension liabilities.

9.   Stock Compensation Plans

        Stock Options

     Bausch & Lomb sponsors several stock-based compensation plans in which the
Company's employees participate. Stock options vest ratably over three years and
expire ten years from the grant date. The exercise price on all options issued
has been equal to the fair market value of the underlying security on the date
of the grant. Vesting is contingent upon continued employment with Bausch &
Lomb. The total number of shares available for grant in each calendar year for
all plans combined excluding incentive stock options shall be no greater than
three percent of the total number of outstanding shares of common stock as of
the first day of each such year. No more than six million shares are available
for granting purposes as incentive stock options under Bausch & Lomb's current
plan. As of December 26, 1998, 2.5 million shares remain available for such
grants.

     All of Bausch & Lomb's stock-based compensation plans are accounted for
under the provisions of APB 25. Under APB 25, because the exercise price of the
Company's employee stock options equals the market price of the underlying stock
on the date of grant, no compensation expense is recognized.

     Pro forma information regarding net income is required by FAS 123, which
also requires that the information be determined as if the Company has accounted
for its employee stock options granted subsequent to December 31, 1994 under the
fair value method of that Statement.

     For purposes of this disclosure, the fair value of each fixed option grant
was estimated on the date of grant using the Black-Scholes option-pricing model
with the following weighted average assumptions used for grants outstanding in
1996, 1997 and 1998:

                                                   1996       1997       1998
                                                  ------     ------     ------
Risk-free interest rate..........................   6.11%      5.66%      4.69%
Dividend yield...................................   2.42%      2.54%      2.48%
Volatility factor................................  24.87%     25.17%     25.67%
Weighted average expected life (years)...........      5          5          4


     The Black-Scholes option valuation model was developed for use in
estimating the fair value of traded options which have no vesting restrictions
and are fully transferable. In addition, option valuation models require the
input of highly subjective assumptions including the expected stock price
volatility. Because Bausch & Lomb's employee stock options have characteristics
significantly different from those of traded options, and because changes in the
subjective input assumptions can materially affect the fair value estimate, in
management's opinion, the existing models do not necessarily provide a reliable
single measure of the fair value of its employee stock options.

     Had compensation expense for the Company's portion of fixed options been
determined consistent with FAS 123, the Company's net income would have been
reduced to the pro forma amounts indicated below:

                                      F-18

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


                                        Net Income
                                --------------------------
                                As Reported      Pro Forma
                                -----------      ---------
1998......................        $23,378        $22,859
1997......................         15,340         15,021
1996......................         15,245         15,042


     A summary of the status of the Company's portion of fixed stock option
plans at year end 1996, 1997 and 1998 is presented below:


<TABLE>
                                                 1996                         1997                          1998
                                     --------------------------   --------------------------   ---------------------------
                                                    Weighted                     Weighted                      Weighted
                                                     Average                      Average                       Average
                                                 Exercise Price               Exercise Price                Exercise Price
                                      Shares       (Per Share)     Shares       (Per Share)      Shares       (Per Share)
                                     --------    --------------   --------    --------------    --------    --------------
<S>                                  <C>         <C>              <C>        <C>                <C>         <C>
Outstanding at beginning of year..   225,584         $40.84       294,162         $39.90        326,722          $41.00
Granted...........................    71,643          35.86        77,154          42.32         73,280           50.64
Exercised.........................       (80)         27.40       (13,350)         30.34        (73,481)          39.45
Forfeited.........................    (2,985)         43.60       (31,244)         41.99         (1,370)          41.48
                                     -------          -----       -------          -----        -------           -----
Outstanding at end of year........   294,162          39.90       326,722          41.00        325,151           43.98
                                     =======          =====       =======          =====        =======           =====
Options exercisable at year end...   177,155                      193,097                       176,096
                                     =======                      =======                       =======
Weighted-average fair value of
options granted during the year...   $  9.34                     $  10.59                      $  10.93
                                     =======                      =======                       =======
</TABLE>


     The following presents additional information about the Company's fixed
stock options outstanding at December 26, 1998:

<TABLE>
                                                 Options Outstanding                        Options Exercisable
                                      ----------------------------------------------    ------------------------------
                                                        Weighted
                                                        Average          Weighted
                                                       Remaining          Average                          Weighted
                                        Number        Contractual     Exercise Price      Number            Average
Range of Exercise Prices Per Share    Outstanding     Life (Years)      (Per Share)     Exercisable     Exercise Price
- ----------------------------------    -----------     ------------    --------------    -----------     --------------
<S>                                   <C>            <C>              <C>               <C>             <C>
$26 to $35........................        52,990            6.3            $34.78          39,726            $34.60
$36 to $45........................       131,413            7.3             41.35          81,577             40.88
$46 to $55........................       140,748            7.5             49.90          54,793             48.26
                                         -------                                          -------
$26 to $55........................       325,151            7.2             43.98         176,096             41.76
                                         =======                                          =======
</TABLE>


   Stock Awards

     Bausch & Lomb issued restricted stock awards to directors, officers and
other key personnel. These awards have vesting periods up to three years with
vesting criteria based upon the attainment of certain Economic-Value-Added (EVA)
metrics and continued employment until applicable vesting dates. EVA is a
measure of capital utilization. It is not, nor is it intended to be, a measure
of operating performance in accordance with generally accepted accounting
principles. Compensation expense is recorded based on the applicable vesting
criteria and, for those awards with performance goals, as such goals are met. In
1996, 1997 and 1998, 2,484, 1,400 and 1,200 such

                                      F-19

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)



awards were granted to Company employees at weighted average market values of
$35.92, $42.25 and $51.63 per share, respectively. The compensation expense
relating to stock awards in 1996, 1997 and 1998 was $24, $84 and $333,
respectively.

10. Business Acquisitions

     The Company acquired several businesses during the three-year period ended
December 26, 1998. All acquisitions have been accounted for under the purchase
method of accounting. The results of operations of the acquired business are
included in the consolidated financial statements from the date of acquisition.

     Significant acquisitions include the following:

     On March 30, 1998, the Company acquired 100% of the outstanding stock of
Tektagen, Inc. ("Tektagen") for $8,000 and assumed debt equal to approximately
$850. Tektagen provides quality control testing and consulting services to the
biotechnology and pharmaceutical industries. The purchase price exceeded the
fair value of the net assets acquired by approximately $6,600, which is being
amortized on a straight line basis over 15 years. In addition, during 1998 the
Company acquired an additional biomedical service business and one research
model business; the impact of each is considered immaterial to the Company's
financial statements taken as a whole.

     On July 31, 1996, the Company reacquired the assets of two businesses it
previously owned for approximately $1,100 in cash plus the forgiveness of
approximately $5,800 in debt. These businesses represent substantially all of
the Company's primate operations. The purchase price was allocated to the fair
value of net assets acquired.

     The following selected unaudited pro forma consolidated results of
operations are presented as if each of the acquisitions had occurred as of the
beginning of the period immediately preceding the period of acquisition after
giving effect to certain adjustments for the amortization of goodwill and
related income tax effects. The pro forma data is for informational purposes
only and does not necessarily reflect the results of operations had the
companies operated as one during the period. No effect has been given for
synergies, if any, that may have been realized through the acquisitions.


                                               Fiscal Year Ended
                                ------------------------------------------------
                                December 28,      December 27,      December 26,
                                    1996              1997              1998
                                ------------      ------------      ------------
(Amounts unaudited)
Net sales...................       $161,708          $179,513          $196,973
Operating income............         25,497            21,830            35,154
Net income..................         15,966            15,018            22,913


     In addition, during 1997 and 1998 the Company made contingent payments of
$640 and $681, respectively, to the former owner of an acquired business in
connection with an additional purchase price commitment.

11.  Joint Ventures

     The Company holds investments in several joint ventures. These joint
ventures are separate legal entities whose purpose is consistent with the
overall operations of the Company and represent geographical expansions of
existing Company markets. The financial results of two of the joint ventures are
consolidated into the Company's results as the Company has the ability to
exercise control over these entities. The interests of the outside joint venture
partners in these two joint ventures has been recorded as minority interests
totaling $290 at December 27, 1997 and $306 at December 26, 1998.

                                      F-20

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


     The Company also has investments in two other joint ventures that are
accounted for on the equity method as the Company does not have the ability to
exercise control over the operations. Charles River Japan is a 50 /50 joint
venture with Ajinomoto Co., Inc. and is an extension of the Company's research
model business in Japan. Dividends received from Charles River Japan amounted to
$725 in 1996, $773 in 1997, and $681 in 1998. Charles River Mexico, a joint
venture which is an extension of the Company's avian business in Mexico, is not
significant to the Company's operations.

     Summarized financial statement information for the unconsolidated joint
ventures is as follows:

<TABLE>
                                                         Fiscal Year Ended
                                              ------------------------------------------
                                              December 28,   December 27,   December 26,
                                                  1996           1997           1998
                                              ------------   ------------   ------------
Condensed Combined Statements of Income
<S>                                           <C>            <C>            <C>
   Net sales................................     $43,978        $44,744        $39,798
   Operating income.........................       7,712          7,484          6,756
   Net income...............................       3,500          3,337          3,445
</TABLE>


                                                  December 27,      December 26,
                                                      1997              1998
                                                  ------------      ------------
Condensed Combined Balance Sheets
     Current assets.............................     $18,466           $19,388
     Non-current assets.........................      34,774            36,376
                                                      ------            ------
                                                     $53,240           $55,764
                                                      ======            ======
     Current liabilities........................     $17,105           $13,501
     Non-current liabilities....................       5,237             6,617
     Shareholders' equity.......................      30,898            35,646
                                                      ------            ------
                                                     $53,240           $55,764
                                                      ======            ======

12.  Commitments and Contingencies

   Insurance

     The Company maintains insurance for workers' compensation, auto liability
and general liability. The per claim loss limits are $250, with annual aggregate
loss limits of $1,500. Related accruals were $849 and $2,363 on December 27,
1997 and December 26, 1998, respectively. Separately, the Company has provided
three letters of credit in favor of the insurance carriers in the amount of
$825.

   Litigation

     Various lawsuits, claims and proceedings of a nature considered normal to
its business are pending against the Company. In the opinion of management, the
outcome of such proceedings and litigation currently pending will not materially
affect the Company's consolidated financial statements. The most potentially
significant claim is described below.

     As discussed in Note 3, the Company is currently under a court order
issued in June 1997 to remove its primate operations from two islands located in
the Florida Keys. The mandate asserts that the Company's operations have

                                      F-21

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)



contributed to the defoliation of certain protected plant life. Reserves of $500
are included in the restructuring reserve recorded in the accompanying
consolidated financial statements to provide for relocation costs and any
exposures in connection with the refoliation.

13. Related Party Transactions

     The Company historically has operated autonomously from Bausch & Lomb.
However, certain costs and expenses including insurance, information technology
and other miscellaneous expenses were charged to the Company on a direct basis.
Management believes these charges are based upon assumptions that are reasonable
under the circumstances. However, these charges and estimates are not
necessarily indicative of the costs and expenses which would have resulted had
the Company incurred these costs as a separate entity. Charges of approximately
$460, $470 and $250 for these items are included in costs of products sold and
services rendered and selling, general and administrative expense in the
accompanying consolidated statements of income for the years ended 1996, 1997
and 1998, respectively.

14. Geographic and Business Segment Information

     The Company is organized into geographic regions for management reporting
with operating income being the primary measure of regional profitability.
Certain general and administrative expenses, including some centralized services
provided by regional offices, are allocated based on business segment sales. The
accounting policies used to generate geographic results are the same as the
Company's overall accounting policies.

     The following table presents sales and other financial information by
geography for the years 1996, 1997 and 1998. Sales to unaffiliated customers
represent net sales originating in entities physically located in the identified
geographic area. Long-lived assets include property, plant and equipment,
goodwill and intangibles, other investments and other assets.

<TABLE>
                                                                   Other
                                             U.S.      France     Non U.S.    Consolidated
                                           -------     ------     --------    ------------
<S>                                        <C>         <C>        <C>         <C>
1996
   Sales to unaffiliated customers.....   $ 83,520    $28,892      $43,192       $155,604
   Long-lived assets...................     65,594     12,790       18,952         96,336
1997
   Sales to unaffiliated customers.....   $100,314    $25,680      $44,719       $170,713
   Long-lived assets...................     62,236     10,146       22,108         94,490
1998
   Sales to unaffiliated customers.....   $115,639    $26,177      $51,485       $193,301
   Long-lived assets...................     76,289     12,751       23,745        112,785
</TABLE>

     The Company's product line segments are research models and biomedical
products and services. The following table presents sales and other financial
information by product line segment for the fiscal years 1996, 1997 and 1998.
Sales to unaffiliated customers represent net sales originating in entities
primarily engaged in either provision of research models or biomedical products
and services. Long-lived assets include property, plant and equipment, goodwill
and intangibles; other investments; and other assets.

                                      F-22

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
                             (dollars in thousands)


                                        1996         1997         1998
Research models                        ------       ------       ------
     Net sales.....................  $ 121,262    $ 125,214    $ 134,590
     Operating income..............     24,080       19,583       30,517
     Total assets .................    162,201      157,915      180,139
     Depreciation and amortization       5,351        5,297        5,534
     Capital expenditures .........      6,119        6,178        8,127
Biomedical products and services
     Net sales ....................  $  34,342    $  45,499    $  58,711
     Operating income .............      3,264        6,496       11,117
     Total assets .................     34,780       38,296       53,271
     Depreciation and amortization.      4,177        4,406        5,361
     Capital expenditures .........      5,453        5,694        3,782



     A reconciliation of segment operating income to consolidated operating
income is as follows:

                                                Fiscal Year Ended
                                  --------------------------------------------
                                  December 28,    December 27,    December 26,
                                      1996            1997            1998
                                  ------------    ------------    ------------
Total segment operating income...    $27,344         $26,079         $41,634
Unallocated corporate overhead...     (3,202)         (4,003)         (6,309)
                                      ------          ------          ------
Consolidated operating income....    $24,142         $22,076         $35,325
                                      ======          ======          ======

     A summary of identifiable long-lived assets of each business segment at
year end is as follows:


                                          December 27,      December 26,
                                              1997              1998
                                          ------------      ------------
Research Models......................       $65,144          $ 73,190
Biomedical Products and Services.....        29,346            39,595
                                             ------           -------
                                            $94,490          $112,785
                                             ======           =======


                                      F-23

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
                  CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)
                             (dollars in thousands)



<TABLE>
                                                                        Nine Months Ended
                                                                   -----------------------------
                                                                   September 26,   September 25,
                                                                        1998            1999
                                                                   -------------   -------------
<S>                                                                <C>             <C>
Net sales..........................................................   $145,519        $161,096
Costs and expenses
   Cost of products sold and services provided.....................     91,041          97,230
   Selling, general and administrative.............................     25,202          29,414
   Amortization of goodwill and intangibles........................      1,036           1,114
                                                                        ------          ------
Operating income...................................................     28,240          33,338
Other income (expense)
   Other income....................................................         --           1,441
   Interest income.................................................        659             496
   Interest expense................................................       (311)           (207)
   Loss from foreign currency, net.................................       (127)           (143)
                                                                        ------          ------
Income before income taxes, minority interests and earnings
   from equity investments.........................................     28,461          34,925
Provision for income taxes.........................................     11,280          16,903
Income before minority interests and earnings from equity
   investments.....................................................     17,181          18,022
Minority interests.................................................         (8)            (10)
Earnings from equity investments...................................      1,286           1,940
                                                                        ------          ------
Net income.........................................................    $18,459         $19,952
                                                                        ======          ======
</TABLE>



                 See Notes to Consolidated Financial Statements.

                                      F-24

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
                     CONSOLIDATED BALANCE SHEET (UNAUDITED)
                             (dollars in thousands)

<TABLE>
                                                                                September 25,
                                                                                     1999
                                                                                -------------
Assets
<S>                                                                             <C>
   Current assets
     Cash and cash equivalents...................................................  $  3,457
     Trade receivables, less allowances of $854..................................    33,820
     Inventories.................................................................    28,577
     Deferred income taxes.......................................................     5,432
     Due from affiliates.........................................................       966
     Other current assets........................................................     5,051
                                                                                    -------
     Total current assets........................................................    77,303

     Property, plant and equipment, net..........................................    79,349
     Goodwill and other intangibles, less accumulated amortization of $6,960.....    16,212
     Investments in affiliates...................................................    19,385
     Other assets................................................................    18,122
                                                                                    -------
       Total assets..............................................................  $210,371
                                                                                    =======
Liabilities and shareholder's equity
   Current liabilities
     Current portion of long-term debt...........................................  $    166
     Current portion of capital lease obligations................................       167
     Accounts payable............................................................     5,992
     Accrued compensation........................................................    11,015
     Accrued ESLIRP..............................................................     5,845
     Deferred income.............................................................     4,550
     Accrued restructuring.......................................................       354
     Accrued liabilities.........................................................    12,410
     Accrued income taxes........................................................    16,208
     Total current liabilities...................................................    56,707
   Long-term debt................................................................        --
   Capital lease obligations.....................................................       700
   Other long-term liabilities...................................................     3,706
                                                                                    -------
       Total liabilities.........................................................    61,113
                                                                                    -------
   Commitments and contingencies (Note 3)
   Minority interests............................................................       293

Shareholder's equity
   Common stock, par value $1 per share, 1,000 shares issued.....................         1
   Capital in excess of par value................................................    17,836
   Retained earnings.............................................................   142,422
   Accumulated other comprehensive income........................................   (11,294)
                                                                                    -------
     Total shareholder's equity..................................................   148,965
                                                                                    -------
       Total liabilities and shareholder's equity................................  $210,371
                                                                                    =======
</TABLE>

                 See Notes to Consolidated Financial Statements.

                                      F-25

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
                CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
                             (dollars in thousands)

<TABLE>
                                                                          Nine Months Ended
                                                                    ------------------------------
                                                                    September 26,    September 25,
                                                                         1998             1999
                                                                    -------------    -------------
<S>                                                                 <C>              <C>
Cash flows relating to operating activities
   Net income.......................................................   $ 18,459         $ 19,952
   Adjustments to reconcile net income to net cash provided
   by operating activities:
     Depreciation and amortization..................................      7,932            8,701
     Provision for doubtful accounts................................        248               13
     Gain from sale of facilities...................................                      (1,441)
     Earnings from equity investments...............................     (1,286)          (1,940)
     Minority interests.............................................          8               10
     Deferred income taxes..........................................       (634)              --
     Stock compensation expense.....................................        159              124
     Property, plant, and equipment write downs.....................         --              324
   Change in assets and liabilities
     Trade receivables..............................................     (3,298)          (3,022)
     Inventories....................................................       (683)           1,232
     Due from affiliates............................................        153             (264)
     Other current assets...........................................     (1,255)          (2,115)
     CVS of life insurance..........................................     (3,585)            (439)
     Other assets...................................................       (464)            (510)
     Accounts payable...............................................        910           (4,767)
     Accrued compensation...........................................      1,640             (605)
     Accrued ESLIRP.................................................        519              688
     Deferred income................................................        671            1,130
     Accrued restructuring..........................................     (1,425)            (759)
     Accrued liabilities............................................      1,687            1,079
     Accrued income taxes...........................................      4,259            2,211
     Other long-term liabilities....................................       (529)             (50)
                                                                         ------           ------
       Net cash provided by operating activities....................     23,486           19,552
                                                                         ------           ------
Cash flows relating to investing activities
   Dividends received from equity investments.......................        681              815
   Proceeds from sale of facilities                                          --            1,860
   Capital expenditures.............................................     (5,834)          (7,426)
   Cash paid for acquisition of businesses..........................     (9,114)               0
                                                                         ------           ------
   Net cash used in investing activities............................    (14,267)          (4,751)
                                                                         ------           ------

Cash flows relating to financing activities
   Long-term debt...................................................       (949)            (312)
   Capital lease obligations........................................        (94)             (90)
   Net activity with Bausch & Lomb..................................     (1,369)         (34,152)
                                                                         ------           ------
     Net cash used in financing activities..........................     (2,412)         (34,554)
                                                                         ------           ------
Effect of exchange rate changes on cash and cash equivalents........        462           (1,601)
                                                                         ------           ------
Net change in cash and cash equivalents.............................      7,269          (21,354)
                                                                         ------           ------
Cash and cash equivalents, beginning of year........................     17,915           24,811
                                                                         ------           ------
Cash and cash equivalents, end of year..............................    $25,184          $ 3,457
                                                                         ======           ======
Supplemental cash flow information
   Cash paid for taxes..............................................    $ 2,202          $ 3,316
   Cash paid for interest...........................................        161              207
</TABLE>

                 See Notes to Consolidated Financial Statements.

                                      F-26

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
        NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS -- (UNAUDITED)
                             (dollars in thousands)

1.   Basis of Presentation

     The consolidated balance sheet at September 25, 1999 and the consolidated
statements of income and of cash flows for the nine months ended September 26,
1998 and September 25, 1999 are unaudited, and certain information and footnote
disclosure related thereto normally included in financial statements prepared in
accordance with generally accepted accounting principles, have been omitted. In
the opinion of management, the accompanying unaudited consolidated financial
statements were prepared following the same policies and procedures used in the
preparation of the audited financial statements and reflect all adjustments
(consisting of normal recurring adjustments) considered necessary to present
fairly the financial position of the Company. The results of operations for the
interim periods are not necessarily indicative of the results for the entire
fiscal year.

2.   Supplemental Balance Sheet Information

     The composition of inventories is as follows:

                                                           September 25,
                                                                1999
                                                           -------------
     Raw materials and supplies...........................      $4,228
     Work in process......................................         988
     Finished products....................................      23,361
                                                                ------
     Net inventories......................................     $28,577
                                                                ======

     The composition of property, plant and equipment is as follows:

                                                           September 25,
                                                               1999
                                                           -------------
Land......................................................      $7,329
Buildings.................................................      89,014
Machinery and equipment...................................      76,648
Leasehold improvements....................................       3,746
Furniture and fixtures....................................       1,595
Vehicles..................................................       2,843
Construction in progress..................................       6,434
                                                               -------
                                                               187,609
Less accumulated depreciation.............................    (108,260)
                                                               -------
Net property, plant and equipment.........................    $ 79,349
                                                               =======


3.   Commitments and Contingencies

        Litigation

     Various lawsuits, claims and proceedings of a nature considered normal to
its business are pending against the Company. In the opinion of management, the
outcome of such proceedings and litigation currently pending will not materially
affect the Company's consolidated financial statements. The most potentially
significant claim is described below.

                                      F-27

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
        NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS -- (UNAUDITED)
                             (dollars in thousands)
                                   (continued)


3.   Commitments and Contingencies (continued)

     The Company is currently under a court order issued June 1997 to remove a
portion of its primate operations from two islands located in the Florida Keys.
The mandate asserts that the Company's operations have contributed to the
defoliation of certain protected plant life. Reserves of $218 are included in
the restructuring reserve recorded in the accompanying consolidated financial
statements to provide for any exposures in connection with the relocation and
refoliation.

4.   Business Segment Information

     The following table presents sales and other financial information by
product line segment for the nine months ended September 26, 1998 and September
25, 1999. Sales to unaffiliated customers represent net sales originating in
entities primarily engaged in either provision of research models or biomedical
products and services.

                                                 1998          1999
                                                ------        ------
      Research models
         Net sales.........................    $103,205      $109,177
         Operating income..................      26,281        27,977
         Total assets......................     182,761       157,284
         Depreciation and amortization.....       5,738         6,044
         Capital expenditures..............       4,112         4,282
      Biomedical products and services
         Net sales.........................    $ 42,314      $ 51,919
         Operating income..................       7,347        11,553
         Total assets......................      39,331        53,087
         Depreciation and amortization.....       2,194         2,657
         Capital expenditures..............       1,722         3,144


     A reconciliation of segment operating income to consolidated operating
income is as follows:

                                                 1998          1999
                                                ------        ------
         Total segment operating income....     $33,628       $39,530
         Unallocated corporate overhead....      (5,388)       (6,192)
                                                 ------        ------
         Consolidated operating income.....     $28,240       $33,338
                                                 ======        ======

5.   Comprehensive Income

     The components of comprehensive income for the nine-month periods ended
September 26, 1998 and September 25, 1999 are set forth below:

                                                 1998          1999
                                                ------        ------
         Net income                             $18,459       $19,952
         Foreign currency translation                20        (4,940)
                                                 ------        ------
         Comprehensive income                   $18,479       $15,012
                                                 ======        ======

                                      F-28

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
        NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS -- (UNAUDITED)
                             (dollars in thousands)
                                   (continued)


6.   Other Income

     During the nine months ended September 25, 1999, the Company recorded a
gain of $1.4 million on the sale of certain facilities located in Florida and
The Netherlands.

7.   Restructuring Reserve

     During the nine months ended September 25, 1999, the Company charged
approximately $759 against the restructuring reserve for costs previously
reserved for. As of September 25, 1999, the remaining restructuring reserve
amounted to $354, comprised primarily of scheduled severance payments and
relocation and refoliation costs. Such payments will be substantially complete
by the end of the year.

8.   Subsequent Events

     On September 29, 1999 CRL Acquisition LLC, an affiliate of DLJ Merchant
Banking Partners II, L.P., consummated a transaction in which it acquired 87.5%
of the common stock of Charles River Laboratories, Inc. from Bausch & Lomb for
approximately $443 million. This transaction was effected through Charles River
Laboratories Holdings, Inc. ("Holdings"), a holding company with no operations
or assets other than its ownership of 100% of the Company's outstanding stock.
This transaction will be accounted for as a leveraged recapitalization, which
will have no impact on the historical basis of the Company's assets and
liabilities. In addition, concurrent with the transaction, the Company purchased
all of the outstanding shares of common stock of SBI Holdings, Inc. ("Sierra"),
a pre-clinical biomedical services company, for $24.0 million. This acquisition
will be accounted for as a purchase business combination with the operating
results of Sierra being included in the Company's consolidated operating results
beginning on the effective date of the acquisition. These transactions are
hereafter referred to as the "Acquisitions".

     The Acquisitions and related transaction fees and expenses were funded as
follows:

     o   issuance of 150,000 units, each consisting of a $1,000 principal amount
         of 13.5% senior subordinated note (the Series A Note Offering) and one
         warrant to purchase 3.942 shares of common stock of Holdings;

     o   borrowings by the Company of $162.0 million under a new senior secured
         credit facility;

     o   an equity investment of $92.4 million in Holdings;

     o   senior discount debentures with warrants issued by Holdings for $37.6
         million; and

     o   subordinated discount note issued by Holdings to Bausch & Lomb for
         $43.0 million.

     The Series A Note Offering (the "Notes") will mature on October 1, 2009.
The Notes will not be redeemable at the issuers' option prior to October 1,
2004. Thereafter, the Notes will be subject to redemption at any time at the
option of the issuer at redemption prices set forth in the Notes. Interest on
the Notes will accrue at the rate of 13.5% per annum and will be payable
semi-annually in arrears on October 1 and April 1 of each year, commencing on
April 1, 2000. The payment of principal and interest on the Notes will be
subordinated in right to the prior payment of all Senior Debt, as defined. The
senior secured credit facility includes a $40 million term loan A facility, a
$120 million term loan B facility and a $30 million revolving credit facility.
The term loan A facility will mature on October 1, 2005, the term loan B
facility will mature on October 1, 2007 and the revolving credit facility will
mature on October 1, 2005. Interest on the term loan A, term loan B and
revolving credit facility will accrue at

                                      F-29

<PAGE>


                        CHARLES RIVER LABORATORIES, INC.
        NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS -- (UNAUDITED)
                             (dollars in thousands)
                                   (continued)


either a base rate plus 1.75% or LIBOR plus 3.0%, at the Company's option (8.5%,
9.25% and 8.5%, respectively, at September 29, 1999) per annum and will be paid
quarterly in arrears commencing on December 30, 1999. A commitment fee in an
amount equal to 0.50% per annum on the daily average unused portion of the
revolving credit facility will be paid quarterly in arrears. Upon the occurrence
of a change in control, as defined, the issuer will be obligated to make an
offer to each holder of the Notes to repurchase all or any part of such holders'
Notes at an offer price in cash equal to 101% of the principal amount thereof,
plus accrued and unpaid interest. Restrictions under the Notes include certain
sales of assets, certain payments of dividends and incurrence of debt, and
limitations on certain mergers and transactions with affiliates. With respect to
the Notes and the senior secured credit facility, the Company will be required
to maintain certain financial ratios and covenants.

9.   Dividends from Foreign Subsidiaries

     During the nine months ended September 25, 1999, cash dividends totaling
$20,662 were remitted to the Company from several of its foreign subsidiaries.
Pursuant to the terms of the transaction more fully described in Note 8, such
dividends were, in turn, remitted by the Company to B&L. As the related amounts
had previously been considered permanently reinvested in the foreign
jurisdictions, the Company was required to provide additional taxes upon their
repatriation to the United States. In addition, during the nine months ended
September 25, 1999, an election was made by B&L to treat certain foreign
entities as branches for United States income tax purposes. As a result, all
previously untaxed accumulated earnings of such entities became immediately
subject to tax in the United States. The receipt of the cash dividends from the
foreign subsidiaries and the foreign tax elections made resulted in incremental
United States taxes of $1,974, net of foreign tax credits, during the nine
months ended September 25, 1999.

                                      F-30

<PAGE>

================================================================================




                                Offer to Exchange
                                 All Outstanding
               13 1/2% Series A Senior Subordinated Notes Due 2009
                                       for
               13 1/2% Series B Senior Subordinated Notes Due 2009

                        Charles River Laboratories, Inc.





                              --------------------
                                   PROSPECTUS
                              --------------------







                                              , 1999




- --------------------------------------------------------------------------------
We have not authorized any dealer, salesperson or other person to give you
written information other than this prospectus or to make representations as to
matters not stated in this prospectus. You must not rely on unauthorized
information. This prospectus is not an offer to sell these securities or our
solicitation of your offer to buy the securities in any jurisdiction where that
would not be permitted or legal. Neither the delivery of this prospectus nor any
sales made hereunder after the date of this prospectus shall create an
implication that the information contained herein or the affairs of the company
have not changed since the date hereof.
- --------------------------------------------------------------------------------



================================================================================

<PAGE>



The information in this prospectus is not complete and may be changed. We may
not sell these securities until the registration statement filed with the
Securities and Exchange Commission is effective. This prospectus is not an offer
to sell these securities and we are not soliciting offers to buy these
securities in any state where the offer or sale is not permitted.

              [ALTERNATE FRONT COVER FOR MARKET-MAKING PROSPECTUS]
                 SUBJECT TO COMPLETION, DATED NOVEMBER 30, 1999
                        Charles River Laboratories, Inc.
                                  $150,000,000
               13 1/2% Series B Senior Subordinated Notes Due 2009

PROSPECTUS
- --------------------------------------------------------------------------------

The Company:

The Company:

o  We are a global market leader in the commercial production and supply of
   animal research models for use in the discovery, development and testing of
   new pharmaceuticals. We are also a supplier of related biomedical products
   and services.

o  Charles River Laboratories, Inc.
   251 Ballardvale Street
   Wilmington, MA 01887
   (978) 658-6000

o  We were acquired in September 1999 by a group of investors including DLJ
   Merchant Banking Partners II, L.P.

The Offering:

o  We issued the notes in      , 1999, in an exchange offer registered under
   the Securities Act of 1933 pursuant to which the notes were exchanged for
   substantially identical notes originally issued in a private offering on
   September 23, 1999.

o  We used the net proceeds of the private offering, together with an equity
   investment of $105.6 million, to fund our recapitalization, our acquisition
   of SBI Holdings, Inc. and to pay fees and expenses related to the
   recapitalization and acquisition. The remaining net proceeds were used for
   general corporate purposes and initially were temporarily invested in
   short-term securities.


The Senior Subordinated Notes:

o  Maturity: October 1, 2009.

o  Interest Payments: semi-annually in cash in arrears on October 1 and April 1,
   commencing on April 1, 2000.

o  Redemption: we can redeem the notes on or after October 1, 2004. In addition,
   we can redeem up to 35% of the notes prior to October 1, 2002, with the net
   proceeds of a public equity offering. Holders of the notes may also require
   us to redeem all or part of such holder's notes upon a change of control.

o  Ranking: the notes will be general unsecured obligations, junior in right of
   payment to $163.3 million of senior indebtedness and secured indebtedness,
   including any borrowings and reimbursement obligations under our new credit
   facility, and the liabilities of our subsidiaries.


      This investment involves risk. See Risk Factors beginning on page 14.

Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of the securities or passed upon the
adequacy or accuracy of this prospectus. Any representation to the contrary is a
criminal offense.

     This prospectus will be used by Donaldson, Lufkin & Jenrette Securities
Corporation in connection with offers and sales in market-making transactions at
negotiated prices related to prevailing market prices. There is currently no
public market for the notes. This prospectus may also be used by DLJ Investment
Partners, L.P., DLJ Investment Funding, Inc., and DLJ ESC II L.P. to comply with
their prospectus delivery requirements of the Securities Act in connection with
any resale transaction. We do not intend to list the notes on any securities
exchange or to seek admission thereof to trading in the National Association of
Securities Dealers Automated Quotation System. Donaldson, Lufkin & Jenrette
Securities Corporation has advised us that it is currently making a market in
the notes; however, it is not obligated to do so and may stop at any time.
Donaldson, Lufkin & Jenrette Securities Corporation may act as principal or
agent in any such transaction. We will not receive the proceeds of the sale of
the notes but will bear the expenses of registration.

- --------------------------------------------------------------------------------
               Donaldson, Lufkin & Jenrette Securities Corporation

The date of this Prospectus is              , 1999.

<PAGE>


                [ALTERNATE SECTIONS FOR MARKET-MAKING PROSPECTUS]

No public trading market for the notes exists

     There is no existing trading market for the notes, and we cannot assure you
about the future development of a market for the notes or your ability to sell
the notes or the price at which you may be able to sell your notes. If such
market were to develop, the notes could trade at prices that may be higher or
lower than the initial offering price of the notes depending on many factors,
including prevailing interest rates, our operating results and the market for
similar securities. Although it is not obligated to do so, Donaldson, Lufkin &
Jenrette Securities Corporation ("DLJSC") intends to make a market in the notes.
Any such market-making activity may be discontinued at any time, for any reason,
without notice at the sole discretion of DLJSC. We do not intend to list the
notes on any securities exchange or to seek admission thereof to trading in the
National Association of Securities Dealers Automated Quotation System. No
assurance can be given as to the liquidity of or the trading market for the
notes.

     DLJSC may be deemed to be our "affiliate" (as defined in the Securities
Act) and, as such, may be required to deliver a prospectus in connection with
its market-making activities in the notes. Pursuant to the registration rights
agreement that we signed with DLJSC in connection with the initial sale of the
new notes, we have agreed to use our best efforts to file and maintain a
registration statement that would allow DLJSC to engage in market-making
transactions in the notes for a period ending no sooner than the date on which
DLJSC is no longer deemed to be such an "affiliate." We have agreed to bear
substantially all the costs and expenses related to registration.

                                 USE OF PROCEEDS

     This prospectus is delivered in connection with the sale of the notes by
DLJSC in market-making transactions. This prospectus may also be used by DLJ
Investment Partners, L.P., DLJ Investment Funding, Inc., and DLJ ESC II L.P. to
comply with their prospectus delivery requirements of the Securities Act in
connection with any resale transaction. We will not receive any of the proceeds
from such transactions.

                              PLAN OF DISTRIBUTION

     This prospectus is to be used by DLJSC in connection with offers and sales
of the new notes in market-making transactions effected from time to time. DLJSC
may act as a principal or agent in such transactions, including as agent for the
counterparty when acting as principal or as agent for both counterparties, and
may receive compensation in the form of discounts and commissions, including
from both counterparties when it acts as agent for both. Such sales will be made
at prevailing market prices at the time of sale, at prices related thereto or at
negotiated prices. This prospectus may also be used by DLJ Investment Partners,
L.P., DLJ Investment Funding, Inc., and DLJ ESC II L.P. to comply with their
prospectus delivery requirements of the Securities Act in connection with any
resale transaction.

     DLJ Merchant Banking, an affiliate of DLJSC, and some of its affiliates
beneficially own approximately 71.9% of the common stock of Charles River. DLJSC
acted as financial advisor to Charles River in the acquisition, and as an
initial purchaser of the old notes. Charles River paid customary fees to DLJSC
as compensation for its services as financial advisor and initial purchaser. The
aggregate amount of all fees paid to DLJSC in connection with the acquisition
and the related financing was approximately $3.6 million plus
out-of-pocket-expenses. Charles River has agreed to engage DLJSC as its
exclusive financial advisor for a period of five years beginning upon the
closing of the merger. Charles River and its subsidiaries may from time to time
enter into financial advisory or other investment banking relationships with
DLJSC or one of its affiliates pursuant to which DLJSC or its affiliates will
receive customary fees and will be entitled to reimbursement for all reasonable
disbursements and out-of-pocket expenses incurred in connection therewith.
Charles River expects that any such arrangement will include provisions for the
indemnification of DLJSC against some liabilities, including liabilities under
the federal securities laws. See "Relationships and Related Party Transactions."


<PAGE>



     DLJSC has informed Charles River that it does not intend to confirm sales
of the new notes to any accounts over which it exercises discretionary authority
without the prior specific written approval of such transactions by the
customer.

     Charles River has been advised by DLJSC that, subject to applicable laws
and regulations, DLJSC currently intends to make a market in the new notes
following completion of the exchange offer. However, DLJSC is not obligated to
do so and any such market-making may be interrupted or discontinued at any time
without notice. In addition, such market-making activity will be subject to the
limits imposed by the Securities Act and the Exchange Act. There can be no
assurance that an active trading market will develop or be sustained. See "Risk
Factors--No public market for the new notes exists."

     DLJSC and Charles River have entered into the Registration Rights Agreement
with respect to the use by DLJSC of this prospectus. Pursuant to such agreement,
Charles River agreed to bear all registration expenses incurred under such
agreement, and Charles River agreed to indemnify DLJSC against some liabilities,
including liabilities under the Securities Act.


<PAGE>


                    [BACK COVER FOR MARKET-MAKING PROSPECTUS]

================================================================================




               13 1/2% Series B Senior Subordinated Notes Due 2009
                        Charles River Laboratories, Inc.





                              --------------------
                                   PROSPECTUS
                              --------------------






               Donaldson, Lufkin & Jenrette Securities Corporation




                                                 , 1999




- --------------------------------------------------------------------------------
We have not authorized any dealer, salesperson or other person to give you
written information other than this prospectus or to make representations as to
matters not stated in this prospectus. You must not rely on unauthorized
information. This prospectus is not an offer to sell these securities or our
solicitation of your offer to buy the securities in any jurisdiction where that
would not be permitted or legal. Neither the delivery of this prospectus nor any
sales made hereunder after the date of this prospectus shall create an
implication that the information contained herein or the affairs of Charles
River have not changed since the date hereof.
- --------------------------------------------------------------------------------


================================================================================

<PAGE>


                                     PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The following is an itemization of all estimated expenses incurred or
expected to be incurred by the Registrant in connection with the issuance and
distribution of the securities being registered hereby, other than underwriting
discounts and commissions.

Item                                                Amount
- ----                                               --------
SEC Registration Fee..........................   $ 41,700.00
Printing and Engraving Costs..................    100,000.00
Trustee Fees..................................     50,000.00
Legal Fees and Expenses.......................    100,000.00
Accounting Fees and Expenses..................     50,000.00
Miscellaneous.................................     50,000.00
                                                  ----------
  Total.......................................   $391,700.00
                                                  ==========


ITEM 14. INDEMNIFICATION OF OFFICERS AND DIRECTORS.

     The certificate of incorporation of Charles River contains a provision
eliminating or limiting director liability to the company and its stockholders
for monetary damages arising from acts or omissions in the director's capacity
as a director. This provision may not, however, eliminate or limit the personal
liability of a director:

     o  for any breach of such director's duty of loyalty to the company or its
        stockholders;

     o  for acts or omissions not in good faith or which involve intentional
        misconduct or a knowing violation of law;

     o  under the Delaware statutory provision making directors personally
        liable, under a negligence standard, for unlawful dividends or unlawful
        stock purchases or redemptions; or

     o  for any transaction from which the director derived an improper personal
        benefit.

As a result of this provision, the ability of the company, or a stockholder
thereof, to successfully prosecute an action against a director for breach of
his duty of care is limited. However, the provision does not affect the
availability of equitable remedies such as an injunction or rescission based
upon a director's breach of his duty of care. The SEC has taken the position
that the provision will have no effect on claims arising under the federal
securities laws.

     In addition, the certificate of incorporation of Charles River provides for
mandatory indemnification rights, subject to limited exceptions, to any director
or executive officer of the company who (by reason of the fact that he or she is
a director or officer) is involved in a legal proceeding of any nature. Such
indemnification rights include reimbursement for expenses incurred by such
director or officer in advance of the final disposition of such proceeding in
accordance with the applicable corporate law.

     Charles River provides insurance from commercial carriers against some
liabilities incurred by the directors and officers of Charles River.

ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES.

     On September 29, 1999, the Registrant sold 150,000 units consisting of
13 1/2% notes due 2009 (the "old notes") and warrants to purchase 591,366 shares
of common stock of Charles River Laboratories Holdings, Inc. for an aggregate
principal amount of $150,000,000 to Donaldson, Lufkin & Jenrette Securities
Corporation (the "initial purchaser") in

<PAGE>


a private placement in reliance on Section 4(2) under the Securities Act, at an
offering price of $1,000 per unit. The old notes were immediately resold by the
initial purchaser in transactions not involving a public offering.

ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

     (a) Exhibits.

  Exhibit
   Number
  -------
    1.1*     Registration Rights Agreement, dated as of September 29, 1999,
             between Charles River and Donaldson, Lufkin & Jenrette Securities
             Corporation, as Initial Purchaser.
    2.1*     Recapitalization Agreement, dated as of July 25, 1999, among
             Charles River, Bausch & Lomb Incorporated, and other parties
             listed therein.
    2.2*     Amendment No. 1 to Recapitalization Agreement, dated as of
             September 29, 1999 by Bausch & Lomb Incorporated and CRL
             Acquisition LLC.
    3.1.1*   Certificate of Incorporation of Charles River Laboratories, Inc.
    3.1.2*   By-laws of Charles River Laboratories, Inc.
    4.1*     Investors' Agreement, dated as of September 29, 1999, among
             Charles River Laboratories Holdings, Inc. and the shareholders
             named therein.
    4.2*     Indenture, dated as of September 29, 1999 among Charles River, and
             the Trustee.
    4.3*     Form of new note (included in Exhibit 4.2)
    5.1*     Opinion of Davis Polk & Wardwell with respect to the new notes.
   10.3*     Credit Agreement, dated as of September 29, 1999, among Charles
             River, the various financial institutions that are or may become
             parties as lenders thereto, DLJ Capital Funding, Inc., as lead
             arranger, sole book runner and syndication agent for the lenders,
             Union Bank of California, N.A., as administrative agent for the
             lenders, and National City Bank, as documentation agent for the
             lenders.
   10.5*     Purchase Agreement between Charles River and Donaldson, Lufkin &
             Jenrette Securities Corporation as Initial Purchaser.
   10.6**    Joint Venture Agreement between Ajinomoto Co., Inc. and Charles
             River Breeding Laboratories, Inc. dated June 24, 1981, and
             ancillary agreements, amendments and addendums. June 15, 1987
             Amendment Agreement, Amending the Joint Venture Agreement. January
             17, 1994 Letter Amendment of Joint Venture Agreement. August 30,
             1996 Addendum to the Joint Venture Agreement. License and
             Technical Assistance Agreement CRL Breeding Labs and Ajinomoto
             Co., Inc. Amendment Agreement, dated March 24, 1978.
   10.7*     Merck Primate Supply Agreement between Merck & Co., Inc. and
             Charles River Laboratories, Inc. dated September 30, 1994.
   10.8*     Amended and Restated Stock Purchase Agreement among Charles River
             Laboratories, Inc. and SBI Holdings, Inc. and its stockholders
             dated September 4, 1999.
   10.9**    Ground Lease between HIC Associates (Lessor) and Charles River
             Laboratories, Inc. (Lessee) dated June 5, 1992; Real Estate Lease
             between Charles River Laboratories, Inc. (Landlord) and Charles
             River Partners L.P. (Tenant) dated December 22, 1993; and
             Assignment and Assumption Agreement between Charles River
             Partners, L.P. (Assignor) and Wilmington Partners L.P. (Assignees)
             dated December 22, 1993.
   10.10*    Amended and Restated Distribution Agreement between Charles River
             BRF, Inc., Charles River Laboratories, Inc., Bioculture Mauritius
             Ltd. and Mary Ann and Owen Griffiths, dated December 23, 1997.
   10.11*    Supply Agreement for non-human primates among Sierra Biomedical,
             Inc. and Scientific Resources International, Ltd., dated March 18,
             1997.
   12.1*     Computation of Ratio of Earnings to Fixed Charges
   12.2*     Computation of Ratio of Total Pro Forma Debt to Adjusted EBITDA
   12.3*     Computation of Ratio of Adjusted EBITDA to Cash Interest Expense
   21.1*     Subsidiaries of Charles River

<PAGE>

   23.1*     Consent of Davis Polk & Wardwell (contained in their opinion filed
             as Exhibit 5.1).
   23.2*     Consent of PricewaterhouseCoopers LLP.
   24.1*     Power of Attorney (Included in Part II of this Registration
             Statement under the caption "Signatures").
   25.1*     Statement of Eligibility of State Street Bank and Trust Company on
             Form T-1.
   27.1*     Financial Data Schedule for Charles River Laboratories, Inc.
   99.1*     Form of Letter of Transmittal
   99.2*     Form of Notice of Guaranteed Delivery
   99.3*     Form of Letter to Clients
   99.4*     Form of Letter to Nominees
   99.5*     Form of Instructions to Registered Holder and/or Book-Entry
             Transfer Participant from Owner

- ------------
*    Filed herewith.
**   To be filed by amendment.

     (b) Financial Statement Schedules.

     Schedule II Valuation and Qualifying Accounts

     Other schedules are omitted because they are not applicable.


<PAGE>


ITEM 17. UNDERTAKINGS.

     The undersigned Registrant hereby undertakes:

     (a) (1) To file, during any period in which offers or sales are being made,
a post-effective amendment to this Registration Statement:

             (x) To include any prospectus required by section 10(a)(3) of the
                Securities Act of 1933;

             (y) To reflect in the prospectus any facts or events arising after
                 the effective date of the Registration Statement (or the most
                 recent post-effective amendment thereof) which, individually or
                 in the aggregate, represent a fundamental change in the
                 information set forth in the Registration Statement.

             (z) To include any material information with respect to the plan of
                 distribution not previously disclosed in the Registration
                 Statement or any material change to such information in the
                 Registration Statement;

         (2) That, for the purpose of determining any liability under the
             Securities Act of 1933, each such post-effective amendment shall be
             deemed to be a new registration statement relating to the
             securities offered therein, and the offering of such securities at
             the time shall be deemed to be the initial bona fide offering
             thereof.

         (3) To remove from registration by means of a post-effective amendment
             any of the securities being registered which remain unsold at the
             termination of the offering.

         Insofar as indemnification for liabilities arising under the Securities
         Act of 1933 may be permitted to directors, officers and controlling
         persons of the Registrant pursuant to the provisions described in Item
         510 of Regulation S-K, or otherwise, the Registrant has been advised
         that in the opinion of the Securities and Exchange Commission such
         indemnification is against public policy as expressed in the Act and
         is, therefore, unenforceable. In the event that a claim for
         indemnification against such liabilities (other than the payment by the
         Registrant of expenses incurred or paid by a director, officer or
         controlling person of the Registrant in the successful defense of any
         action, suit or proceeding) is asserted by such director, officer or
         controlling person in connection with the securities being registered,
         the Registrant will, unless in the opinion of its counsel the matter
         has been settled by controlling precedent, submit to a court of
         appropriate jurisdiction the question whether such indemnification by
         it is against public policy as expressed in the Act and will be
         governed by the final adjudication of such issue.


<PAGE>


                                   SIGNATURES

     Pursuant to the requirements of the Securities Act, the registrant has duly
caused this amendment to the registration statement to be signed on its behalf
by the undersigned, thereunto duly authorized, in the City of Wilmington, State
of Massachusetts, on November 30, 1999.

                                       CHARLES RIVER LABORATORIES, INC.

                                       By: /s/ Thomas F. Ackerman
                                           ---------------------------
                                           Chief Financial Officer


                                POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that each individual whose signature
appears below constitutes and appoints Thomas F. Ackerman and James C. Foster,
and each of them, his true and lawful attorneys-in-fact and agents with full
power of substitution, for him and in his name, place and stead, in any and all
capacities, to sign any and all amendments (including post-effective amendments)
to this Registration Statement, and to sign any registration statement for the
same offering covered by this Registration Statement that is to be effective on
filing pursuant to Rule 462(b) promulgated under the Securities Act of 1933, and
all post-effective amendments thereto, and to file the same, with all exhibits
thereto and all documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the premises, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or his or
their substitutes, may lawfully do or cause to be done by virtue hereof.

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the dates indicated.

<TABLE>
         Signature                              Title                                  Date
         ---------                              -----                                  ----
<S>                           <C>                                                <C>
/s/ James C. Foster           President, Chief Executive Officer (Principal      November 30, 1999
- --------------------------    Executive Officer) and Director
     James C. Foster

/s/ Thomas F. Ackerman        Chief Financial Officer (Principal Financial       November 30, 1999
- --------------------------    Officer) and Vice President, Finance and
   Thomas F. Ackerman         Administration (Principal Accounting Officer)


/s/ Reid S. Perper            Director                                           November 30, 1999
- --------------------------
   Reid S. Perper

/s/ Thompson Dean             Director                                           November 30, 1999
- --------------------------
   Thompson Dean

/s/ Robert Cawthorn           Director                                           November 30, 1999
- --------------------------
   Robert Cawthorn

/s/ Douglas E. Rogers         Director                                           November 30, 1999
- --------------------------
   Douglas E. Rogers
</TABLE>


<PAGE>


                        Allowance for Doubtful Accounts
<TABLE>

- ----------------------------------------------------------------------------------------------------------------------
<S>                    <C>           <C>           <C>           <C>          <C>            <C>            <C>
                       Balance at    Charged to    Charged to                                               Balance at
                       beginning     costs and       other                                                    end of
                       of period      expenses      accounts     Describe     Deductions      Describe        period
- ----------------------------------------------------------------------------------------------------------------------
                                                   (dollars in thousands)
- ----------------------------------------------------------------------------------------------------------------------
For the year ended
December 31, 1998
Allowance for
  Doubtful                                                                                   Recoveries/
  Accounts.........      $ 688         $ 265                     Provision      $ (55)       Write-offs       $ 898
- ----------------------------------------------------------------------------------------------------------------------
For the year ended
December 31, 1997
Allowance for
  Doubtful                                                                                   Recoveries/
  Accounts.........      $ 568         $ 192                     Provision      $ (72)       Write-offs       $ 688
- ----------------------------------------------------------------------------------------------------------------------
 For the year ended
December 31, 1996
Allowance for
  Doubtful                                                                                   Recoveries/
  Accounts.........      $ 490         $ 101                     Provision      $ (23)       Write-offs       $ 568
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>


<PAGE>

                                Index to Exhibits

   Exhibit
    Number
   -------
     1.1*     Registration Rights Agreement, dated as of September 29, 1999,
              between Charles River and Donaldson, Lufkin & Jenrette Securities
              Corporation, as Initial Purchaser.
     2.1*     Recapitalization Agreement, dated as of July 25, 1999, among
              Charles River, Bausch & Lomb
               Incorporated, and other parties listed therein.
     2.2*     Amendment No. 1 to Recapitalization Agreement, dated as of
              September 29, 1999 by Bausch & Lomb Incorporated and CRL
              Acquisition LLC.
     3.1.1*   Certificate of Incorporation of Charles River Laboratories, Inc.
     3.1.2*   By laws of Charles River Laboratories, Inc.
     4.1*     Investors' Agreement, dated as of September 29, 1999, among
              Charles River Laboratories Holdings, Inc. and the shareholders
              named therein.
     4.2*     Indenture, dated as of September 29, 1999 among Charles River, and
              the Trustee.
     4.3*     Form of new note (included in Exhibit 4.2)
     5.1*     Opinion of Davis Polk & Wardwell with respect to the new notes.
    10.3*     Credit Agreement, dated as of September 29, 1999, among Charles
              River, the various financial institutions that are or may become
              parties as lenders thereto, DLJ Capital Funding, Inc., as lead
              arranger, sole book runner and syndication agent for the lenders,
              Union Bank of California, N.A., as administrative agent for the
              lenders, and National City Bank, as documentation agent for the
              lenders.
    10.5*     Purchase Agreement between Charles River and Donaldson, Lufkin &
              Jenrette Securities Corporation as Initial Purchaser.
    10.6**    Joint Venture Agreement between Ajinomoto Co., Inc. and Charles
              River Breeding Laboratories, Inc. dated June 24, 1981, and
              ancillary agreements, amendments and addendums. June 15, 1987
              Amendment Agreement, Amending the Joint Venture Agreement. January
              17, 1994 Letter Amendment of Joint Venture Agreement. August 30,
              1996 Addendum to the Joint Venture Agreement. License and
              Technical Assistance Agreement CRL Breeding Labs and Ajinomoto
              Co., Inc. Amendment Agreement, dated March 24, 1978.
    10.7*     Merck Primate Supply Agreement between Merck & Co., Inc. and
              Charles River Laboratories, Inc. dated September 30, 1994.
    10.8*     Amended and Restated Stock Purchase Agreement among Charles River
              Laboratories, Inc. and SBI Holdings, Inc. and its stockholders
              dated September 4, 1999.
    10.9**    Ground Lease between HIC Associates (Lessor) and Charles River
              Laboratories, Inc. (Lessee) dated June 5, 1992; Real Estate Lease
              between Charles River Laboratories, Inc. (Landlord) and Charles
              River Partners L.P. (Tenant) dated December 22, 1993; and
              Assignment and Assumption Agreement between Charles River
              Partners, L.P. (Assignor) and Wilmington Partners L.P. (Assignees)
              dated December 22, 1993.
    10.10*    Amended and Restated Distribution Agreement between Charles River
              BRF, Inc., Charles River Laboratories, Inc., Bioculture Mauritius
              Ltd. and Mary Ann and Owen Griffiths, dated December 23, 1997.
    10.11*    Supply Agreement for non-human primates among Sierra Biomedical,
              Inc. and Scientific Resources International, Ltd., dated March 18,
              1997.
    12.1*     Computation of Ratio of Earnings to Fixed Charges
    12.2*     Computation of Ratio of Total Debt to Adjusted EBITDA
    12.3*     Computation of Ratio of Adjusted EBITDA to Cash Interest Expense
    21.1*     Subsidiaries of Charles River
    23.1*     Consent of Davis Polk & Wardwell (contained in their opinion filed
              as Exhibit 5.1).
    23.2*     Consent of PricewaterhouseCoopers LLP.
    24.1*     Power of Attorney (Included in Part II of this Registration
              Statement under the caption "Signatures").
    25.1*     Statement of Eligibility of State Street Bank and Trust Company on
              Form T-1.
    27.1*     Financial Data Schedule for Charles River Laboratories, Inc.

<PAGE>


   Exhibit
    Number
   -------
    99.1*     Form of Letter of Transmittal
    99.2*     Form of Notice of Guaranteed Delivery
    99.3*     Form of Letter to Clients
    99.4*     Form of Letter to Nominees
    99.5*     Form of Instructions to Registered Holder and/or Book-Entry
              Transfer Participant from Owner

- ------------
*  Filed herewith.

** To be filed by amendment.

                                                                     EXHIBIT 1.1
================================================================================



                                  A/B EXCHANGE
                          REGISTRATION RIGHTS AGREEMENT

                        CHARLES RIVER LABORATORIES, INC.

                                    as Issuer

                               SBI HOLDINGS, INC.
                             SIERRA BIOMEDICAL, INC.
                        SIERRA BIOMEDICAL SAN DIEGO, INC.

                                  as Guarantors



                                  $150,000,000
                   13 1/2% SENIOR SUBORDINATED NOTES DUE 2009

                         Dated as of September 29, 1999

                               -------------------


                          DONALDSON, LUFKIN & JENRETTE
                             SECURITIES CORPORATION




================================================================================

<PAGE>


         This Registration Rights Agreement (this "Agreement") is made and
entered into as of September 29, 1999, by and among Charles River Laboratories,
Inc., a Delaware corporation (the "Issuer" or the "Company"), SBI Holdings,
Inc., a Nevada corporation, Sierra Biomedical, Inc., a Nevada corporation and
Sierra Biomedical San Diego, Inc., a California corporation (the "Guarantors"),
and Donaldson, Lufkin & Jenrette Securities Corporation (the "Initial
Purchaser"), who has agreed to purchase the Company's 13 1/2% Series A Senior
Subordinated Notes due 2009 (the "Series A Notes") pursuant to the Purchase
Agreement (as defined below).

         This Agreement is made pursuant to the Purchase Agreement, dated
September 23, 1999 (the "Purchase Agreement"), by and among the Issuer, the
Guarantors (which will become parties to the Purchase Agreement as of the date
hereof) and the Initial Purchaser. In order to induce the Initial Purchaser to
purchase the Series A Notes, the Issuer has agreed to provide the registration
rights set forth in this Agreement. The execution and delivery of this Agreement
is a condition to the obligations of the Initial Purchaser set forth in Section
3 of the Purchase Agreement. Capitalized terms used herein and not otherwise
defined shall have the meaning assigned to them in the Indenture, dated
September 29, 1999, among the Company, the Guarantors and State Street Bank and
Trust Company, as Trustee (the "Trustee"), relating to the Series A Notes and
the Series B Notes (the "Indenture").

         The parties hereby agree as follows:

SECTION 1.  DEFINITIONS

         As used in this Agreement, the following capitalized terms shall have
the following meanings:

         Act:  The Securities Act of 1933, as amended.

         Affiliate:  As defined in Rule 144.

         Affiliated Market Maker: A Broker-Dealer or one of its Affiliates who
is deemed to be an Affiliate of the Issuer.

         Broker-Dealer:  Any broker or dealer registered under the Exchange Act.

         Certificated Securities:  Definitive Notes, as defined in the
Indenture.

         Closing Date:  The date hereof.

         Commission:  The Securities and Exchange Commission.

         Consummate: An Exchange Offer shall be deemed "Consummated" for
purposes of this Agreement upon the occurrence of (a) the filing and
effectiveness under the Act of the Exchange Offer Registration Statement
relating to the Series B Notes to be issued in the Exchange Offer, (b) the
keeping of the Exchange Offer open for a period not less than the period
required pursuant to Section 3(b) hereof and (c) the delivery by the Issuer to
the Registrar under the Indenture of Series B Notes in the same aggregate
principal amount as the aggregate principal amount of Series A Notes validly
tendered and not withdrawn by Holders thereof pursuant to the Exchange Offer.

         Consummation Date:  The date on which the Exchange Offer is
Consummated.

<PAGE>


         Consummation Deadline:  As defined in Section 3(b) hereof.

         Effectiveness Deadline:  As defined in Sections 3(a) and 4(a) hereof.

         Exchange Act:  The Securities Exchange Act of 1934, as amended.

         Exchange Offer: The exchange and issuance by the Issuer of a principal
amount of Series B Notes (which shall be registered pursuant to the Exchange
Offer Registration Statement) equal to the aggregate principal amount of Series
A Notes that are validly tendered and not withdrawn in connection with such
exchange and issuance.

         Exchange Offer Registration Statement: The Registration Statement
relating to the Exchange Offer, including the related Prospectus.

         Exempt Resales: The transactions in which the Initial Purchaser
proposes to sell the Series A Notes to certain "qualified institutional buyers,"
as such term is defined in Rule 144A under the Act, and pursuant to
Regulation S.

         Filing Deadline:  As defined in Sections 3(a) and 4(a) hereof.

         Holders:  As defined in Section 2 hereof.

         Prospectus: The prospectus included in a Registration Statement at the
time such Registration Statement is declared effective, as amended or
supplemented by any prospectus supplement and by all other amendments thereto,
including post-effective amendments, and all material incorporated by reference
into such prospectus.

         Recommencement Date: As defined in Section 6(d) hereof.

         Registration Default:  As defined in Section 5 hereof.

         Registration Statement: Any registration statement of the Issuer and
the Guarantors relating to (a) an offering of Series B Notes pursuant to an
Exchange Offer or (b) the registration for resale of Transfer Restricted
Securities pursuant to the Shelf Registration Statement, in each case, (i) that
is filed pursuant to the provisions of this Agreement and (ii) including the
Prospectus included therein and all exhibits thereto.

         Regulation S:  Regulation S promulgated under the Act.

         Rule 144:  Rule 144 promulgated under the Act.

         Series B Notes: The Issuer's 13 1/2% Senior Subordinated Notes due 2009
to be issued pursuant to the Indenture (i) in the Exchange Offer or (ii) as
contemplated by Section 6(b) hereof.

         Shelf Registration Statement:  As defined in Section 4 hereof.

         Suspension Notice:  As defined in Section 6(d) hereof.


                                       2

<PAGE>


         TIA:  The Trust Indenture Act of 1939 (15 U.S.C. Section 77aaa-77bbbb),
as in effect on the date of the Indenture.

         Transfer Restricted Securities: Each (a) Series A Note, until the
earliest to occur of (i) the date on which such Series A Note is exchanged in
the Exchange Offer for a Series B Note, (ii) the date on which such Series A
Note has been disposed of in accordance with a Shelf Registration Statement (and
the purchasers thereof have been issued Series B Notes), and (iii) the date on
which such Series A Note is distributed to the public pursuant to Rule 144 under
the Act and (b) each Series B Note issued to a Broker-Dealer in the Exchange
Offer until the date on which such Series B Note is disposed of by such
Broker-Dealer pursuant to the "Plan of Distribution" contemplated by the
Exchange Offer Registration Statement (including the delivery of the Prospectus
contained therein).

SECTION 2.  HOLDERS

         A Person is deemed to be a holder of Transfer Restricted Securities
(each, a "Holder") whenever such Person is the holder of record of Transfer
Restricted Securities.

SECTION 3.  REGISTERED EXCHANGE OFFER

         (a) Unless the Exchange Offer shall not be permitted by applicable
federal law (after the procedures set forth in Section 6(a)(i) hereof have been
complied with), the Issuer and the Guarantors shall use their respective
reasonable best efforts to (i) cause the Exchange Offer Registration Statement
to be filed with the Commission as soon as practicable after the Closing Date,
but in no event later than 90 days after the Closing Date (such 90th day, the
"Filing Deadline"), (ii) cause such Exchange Offer Registration Statement to
become effective at the earliest possible time, but in no event later than 180
days after the Closing Date (such 180th day, the "Effectiveness Deadline"),
(iii) in connection with the foregoing, (A) file all pre-effective amendments to
such Exchange Offer Registration Statement as may be necessary in order to cause
it to become effective, and (B) subject to the proviso in Section 6(c)(xii)
hereof, cause all necessary filings, if any, in connection with the registration
and qualification of the Series B Notes to be made under the Blue Sky laws of
such jurisdictions as are necessary to permit Consummation of the Exchange
Offer, and (iv) upon the effectiveness of such Exchange Offer Registration
Statement, commence and, within the time periods contemplated by Section 3(b)
hereof, Consummate the Exchange Offer. The Exchange Offer shall be on the
appropriate form permitting (i) registration of the Series B Notes to be offered
in exchange for the Series A Notes that are Transfer Restricted Securities and
(ii) resales of Series B Notes by Broker-Dealers that tendered into the Exchange
Offer Series A Notes that such Broker-Dealer acquired for its own account as a
result of its market-making activities or other trading activities (other than
Series A Notes acquired directly from the Issuer or any of its Affiliates) as
contemplated by Section 3(c) hereof.

         (b) The Issuer and the Guarantors shall use their respective reasonable
best efforts to cause the Exchange Offer Registration Statement to be effective
continuously, and shall keep the Exchange Offer open for a period of not less
than the minimum period required under applicable federal and state securities
laws to Consummate the Exchange Offer; provided that in no event shall such
period be less than 20 Business Days. The Issuer and the Guarantors shall cause
the Exchange Offer to comply with all applicable federal and state securities
laws. No securities other than the Series B Notes shall be included in the
Exchange Offer Registration Statement. The Issuer and the Guarantors shall use
their respective reasonable best efforts to cause the Exchange Offer to be
Consummated within 30 Business Days after


                                       3

<PAGE>


the Exchange Offer Registration Statement has become effective, but in no event
later than 40 Business Days thereafter (such 40th day, the "Consummation
Deadline").

         (c) The Issuer shall include a "Plan of Distribution" section in the
Prospectus contained in the Exchange Offer Registration Statement and indicate
therein that any Broker-Dealer who holds Transfer Restricted Securities that
were acquired for the account of such Broker-Dealer as a result of market-making
activities or other trading activities (other than Series A Notes acquired
directly from the Issuer or any of its Affiliates), may exchange such Transfer
Restricted Securities pursuant to the Exchange Offer. Such "Plan of
Distribution" section shall also contain all other information with respect to
such sales by such Broker-Dealers that the Commission may require in order to
permit such sales pursuant thereto, but such "Plan of Distribution" shall not
name any such Broker-Dealer or disclose the amount of Transfer Restricted
Securities held by any such Broker-Dealer, except to the extent required by the
Commission.

         Because such Broker-Dealer may be deemed to be an "underwriter" within
the meaning of the Act and must, therefore, deliver a prospectus meeting the
requirements of the Act in connection with its initial sale of any Series B
Notes received by such Broker-Dealer in the Exchange Offer, the Issuer and the
Guarantors shall permit the use of the Prospectus contained in the Exchange
Offer Registration Statement by such Broker-Dealer to satisfy such prospectus
delivery requirement for a period of 90 days following the Consummation Date. To
the extent necessary to ensure that the Prospectus contained in the Exchange
Offer Registration Statement is available for sales of Series B Notes by
Broker-Dealers, the Issuer and the Guarantors agree to use their respective
reasonable best efforts to keep the Exchange Offer Registration Statement
continuously effective, supplemented, amended and current as required by and
subject to the provisions of Sections 6(a) and (c) hereof and in conformity with
the requirements of this Agreement, the Act and the policies, rules and
regulations of the Commission as announced from time to time, for a period of 90
days from the Consummation Date or such shorter period as will terminate when no
Transfer Restricted Securities are outstanding. The Issuer and the Guarantors
shall provide sufficient copies of the latest version of such Prospectus to such
Broker-Dealers, promptly upon request, at any time during such period.

SECTION 4.  SHELF REGISTRATION

         (a) Shelf Registration. If (i) the Exchange Offer is not permitted by
applicable law (after the Issuer and the Guarantors have complied with the
procedures set forth in Section 6(a)(i) hereof) or (ii) if any Holder of
Transfer Restricted Securities shall notify the Issuer in writing within 20
Business Days following the Consummation Deadline that (A) based on an opinion
of counsel, such Holder was prohibited by law or Commission policy from
participating in the Exchange Offer or (B) such Holder is a Broker-Dealer and
holds Series A Notes acquired directly from the Issuer or any of its Affiliates,
then the Issuer and the Guarantors shall:

              (x) cause to be filed, on or prior to 90 days after the earlier of
         (i) the date on which the Issuer determines that the Exchange Offer
         Registration Statement cannot be filed as a result of Section 4(a)(i)
         hereof and (ii) the date on which the Issuer receives the notice
         specified in Section 4(a)(ii) hereof (such earlier date, the "Filing
         Deadline"), a shelf registration statement (the "Shelf Registration
         Statement") pursuant to Rule 415 under the Act (which may be an
         amendment to the Exchange Offer Registration Statement) relating to (1)
         all Transfer Restricted Securities in the case of clause (a)(i) above
         or (2) the Transfer Restricted Securities specified in any notice in
         the case of clause (a)(ii) above; and


                                       4

<PAGE>


              (y) shall use their respective reasonable best efforts to cause
         such Shelf Registration Statement to become effective on or prior to
         180 days after the Filing Deadline for the Shelf Registration Statement
         (such 180th day, the "Effectiveness Deadline").

         If, after the Issuer has filed an Exchange Offer Registration Statement
that satisfies the requirements of Section 3(a) hereof, the Issuer is required
to file and make effective a Shelf Registration Statement solely because the
Exchange Offer is not permitted under applicable federal law (i.e., Section
4(a)(i) hereof), then the filing of the Exchange Offer Registration Statement
shall be deemed to satisfy the requirements of clause (x) above; provided that,
in such event, the Issuer shall remain obligated to meet the Effectiveness
Deadline set forth in clause (y).

         To the extent necessary to ensure that the Shelf Registration Statement
is available for sales of Transfer Restricted Securities by the Holders thereof
entitled to the benefit of this Section 4(a) and the other securities required
to be registered therein pursuant to Section 6(b)(ii) hereof, the Issuer and the
Guarantors shall use their respective reasonable best efforts to keep any Shelf
Registration Statement required by this Section 4(a) continuously effective,
supplemented, amended and current as required by and subject to the provisions
of Sections 6(b) and (c) hereof and in conformity with the requirements of this
Agreement, the Act and the policies, rules and regulations of the Commission as
announced from time to time, until the later of (a) the date on which no Initial
Purchaser is deemed to be an Affiliate of the Issuer, and (b) the earlier of the
second anniversary of the Closing Date (as such date may be extended pursuant to
Section 6(d) hereof) and such earlier date when no Transfer Restricted
Securities covered by such Shelf Registration Statement remain outstanding.

         (b) Provision by Holders of Certain Information in Connection with the
Shelf Registration Statement. No Holder of Transfer Restricted Securities may
include any of its Transfer Restricted Securities in any Shelf Registration
Statement pursuant to this Agreement unless and until such Holder furnishes to
the Issuer in writing, within 20 days after receipt of a request therefor, the
information specified in Item 507 or 508 of Regulation S-K, as applicable, of
the Act for use in connection with any Shelf Registration Statement or
Prospectus or preliminary Prospectus included therein. No Holder of Transfer
Restricted Securities shall be entitled to liquidated damages pursuant to
Section 5 hereof unless and until such Holder shall have provided all such
information. Each selling Holder agrees to promptly furnish additional
information required to be disclosed in order to make the information previously
furnished to the Issuer by such Holder not materially misleading.

         (c) Holders of Transfer Restricted Securities that do not give the
written notice within the 20 Business Day period set forth in Section 4(a)(ii)
hereof, if required to be given, will no longer have any registration rights
pursuant to this Section 4 and will not be entitled to any liquidated damages
pursuant to Section 5 hereof in respect of the Issuer's obligations with respect
to the Shelf Registration Statement. Notwithstanding the foregoing, no Affiliate
of the Company shall be required to give such written notice or deliver an
opinion in order to maintain its registration rights pursuant to this Section 4.

SECTION 5.  LIQUIDATED DAMAGES

         If (i) any Registration Statement required by this Agreement is not
filed with the Commission on or prior to the applicable Filing Deadline, (ii)
any such Registration Statement has not been declared effective by the
Commission on or prior to the applicable Effectiveness Deadline, (iii) the
Exchange Offer has not been Consummated on or prior to the Consummation Deadline
or (iv) any Registration Statement required by this Agreement is filed and
declared effective but shall thereafter cease to be


                                       5

<PAGE>


effective or fail to be usable for its intended purpose without being succeeded
within ten Business Days by a post-effective amendment to such Registration
Statement that cures such failure and that is itself declared effective within
ten Business Days of filing such post-effective amendment to such Registration
Statement (each such event referred to in clauses (i) through (iv), a
"Registration Default"), then the Issuer and the Guarantors hereby jointly and
severally agree to pay to each Holder of Transfer Restricted Securities affected
thereby liquidated damages in an amount equal to $.05 per week per $1,000 in
principal amount of Transfer Restricted Securities held by such Holder for each
week or portion thereof that the Registration Default continues for the first
90-day period immediately following the occurrence of such Registration Default.
The amount of the liquidated damages shall increase by an additional $.05 per
week per $1,000 in principal amount of Transfer Restricted Securities with
respect to each subsequent 90-day period until all Registration Defaults have
been cured, up to a maximum amount of liquidated damages of $.25 per week per
$1,000 in principal amount of Transfer Restricted Securities; provided that the
Issuer and the Guarantors shall in no event be required to pay liquidated
damages for more than one Registration Default at any given time.
Notwithstanding anything to the contrary set forth herein, (1) upon filing of
the Exchange Offer Registration Statement (and/or, if applicable, the Shelf
Registration Statement), in the case of (i) above, (2) upon the effectiveness of
the Exchange Offer Registration Statement (and/or, if applicable, the Shelf
Registration Statement), in the case of (ii) above, (3) upon Consummation of the
Exchange Offer, in the case of (iii) above, (4) upon the filing of a
post-effective amendment to the Registration Statement or an additional
Registration Statement that causes the Exchange Offer Registration Statement
(and/or, if applicable, the Shelf Registration Statement) to again be declared
effective or made usable in the case of (iv) above, or (5) if sooner, upon the
first date on which no Transfer Restricted Securities remain outstanding, in the
case of clauses (i) through (iv) above, the liquidated damages payable with
respect to the Transfer Restricted Securities as a result of such clause (i),
(ii), (iii) or (iv), as applicable, shall cease.

         All accrued liquidated damages shall be paid to the Holders entitled
thereto, in the manner provided for the payment of interest in the Indenture, on
each Interest Payment Date, as more fully set forth in the Indenture and the
Notes. Notwithstanding the fact that any securities for which liquidated damages
are due cease to be Transfer Restricted Securities, all obligations of the
Issuer and the Guarantors to pay liquidated damages with respect to securities
that accrued prior to the time such securities ceased to be Transfer Restricted
Securities shall survive until such time as such obligations with respect to
such securities shall have been satisfied in full.

SECTION 6.  REGISTRATION PROCEDURES

         (a) Exchange Offer Registration Statement. In connection with the
Exchange Offer, the Issuer and the Guarantors shall (x) comply with all
applicable provisions of Section 6(c) hereof, (y) use their respective
reasonable best efforts to effect such exchange and to permit the resale of
Series B Notes by Broker-Dealers that tendered in the Exchange Offer Series A
Notes that such Broker-Dealer acquired for its own account as a result of its
market-making activities or other trading activities (other than Series A Notes
acquired directly from the Issuer or any of its Affiliates) being sold in
accordance with the intended method or methods of distribution thereof, and (z)
comply with all of the following provisions:

              (i) If, following the date hereof there has been announced a
         change in Commission policy with respect to exchange offers, such as
         the Exchange Offer, that, in the opinion of counsel to the Issuer,
         raises a substantial question as to whether the Exchange Offer is
         permitted by applicable federal law, the Issuer and the Guarantors
         hereby agree to seek a no-action letter or other favorable decision
         from the Commission allowing the Issuer and the Guarantors to
         Consummate an Exchange


                                       6

<PAGE>


         Offer for such Transfer Restricted Securities. The Issuer and the
         Guarantors hereby agree to use their respective reasonable best efforts
         in pursuing the issuance of such a decision to the Commission staff
         level.

              (ii) As a condition to its participation in the Exchange Offer,
         each Holder of Transfer Restricted Securities (including, without
         limitation, any Holder who is a Broker-Dealer) shall furnish, upon the
         request of the Issuer, prior to the Consummation of the Exchange Offer,
         a written representation to the Issuer and the Guarantors (which may be
         contained in the letter of transmittal contemplated by the Exchange
         Offer Registration Statement) to the effect that, at the time of
         Consummation of the Exchange Offer, (A) any Series B Notes received by
         such Holder will be acquired in the ordinary course of its business,
         (B) such Holder will have no arrangement or understanding with any
         person to participate in the distribution of the Series A Notes or the
         Series B Notes within the meaning of the Act, (C) if the Holder is not
         a Broker-Dealer or is a Broker-Dealer but will not receive Series B
         Notes for its own account in exchange for Series A Notes, neither the
         Holder nor any such other Person is engaged in or intends to
         participate in a distribution of the Series B Notes, and (D) that such
         Holder is not an Affiliate of the Issuer. If the Holder is a
         Broker-Dealer that will receive Series B Notes for its own account in
         exchange for Series A Notes, it will represent that the Notes to be
         exchanged for the Series B Notes were acquired by it as a result of its
         market-making activities or other trading activities, and will
         acknowledge that it will deliver a prospectus meeting the requirements
         of the Act in connection with any resale of such Series B Notes. It is
         understood that, by acknowledging that it will deliver, and by
         delivering, a prospectus meeting the requirements of the Act in
         connection with any resale of such Series B Notes, the Holder is not
         admitting that it is an "underwriter" within the meaning of the Act.

              (iii) Prior to effectiveness of the Exchange Offer Registration
         Statement, the Issuer and the Guarantors shall provide a supplemental
         letter to the Commission (A) stating that the Issuer and the Guarantors
         are registering the Exchange Offer in reliance on the position of the
         Commission enunciated in Exxon Capital Holdings Corporation (available
         May 13, 1988) and Morgan Stanley and Co., Inc. (available June 5,
         1991), as interpreted in the Commission's letter to Shearman & Sterling
         dated July 2, 1993, and, if applicable, any no-action letter obtained
         pursuant to clause (i) above, (B) including a representation that
         neither the Issuer nor any Guarantor has entered into any arrangement
         or understanding with any Person to distribute the Series B Notes to be
         received in the Exchange Offer and that, to the best of the Issuer's
         and each Guarantors' information and belief, each Holder participating
         in the Exchange Offer is acquiring the Series B Notes in its ordinary
         course of business and has no arrangement or understanding with any
         Person to participate in the distribution of the Series B Notes
         received in the Exchange Offer and (C) any other undertaking or
         representation required by the Commission as set forth in any no-action
         letter obtained pursuant to clause (i) above, if applicable.

         (b) Shelf Registration Statement. In connection with the Shelf
Registration Statement, the Issuer and the Guarantors shall:

              (i) comply with all the provisions of Section 6(c) hereof and use
         their respective reasonable best efforts to effect such registration to
         permit the sale of the Transfer Restricted Securities being sold in
         accordance with the intended method or methods of distribution thereof
         (as indicated in the information furnished to the Issuer pursuant to
         Section 4(b) hereof), and pursuant thereto the Issuer and the
         Guarantors will prepare and file with the Commission a Registration
         Statement relating to the registration on any appropriate form under
         the Act, which form shall be


                                       7

<PAGE>


         available for the sale of the Transfer Restricted Securities in
         accordance with the intended method or methods of distribution thereof
         within the time periods and otherwise in accordance with the provisions
         hereof, and

              (ii) issue, upon the request of any Holder or purchaser of Series
         A Notes covered by any Shelf Registration Statement contemplated by
         this Agreement, Series B Notes having an aggregate principal amount
         equal to the aggregate principal amount of Series A Notes sold pursuant
         to the Shelf Registration Statement and surrendered to the Issuer for
         cancellation; the Issuer shall register Series B Notes on the Shelf
         Registration Statement for this purpose and issue the Series B Notes to
         the purchaser(s) of securities subject to the Shelf Registration
         Statement in the names as such purchaser(s) shall designate.

         (c) General Provisions. In connection with any Registration Statement
and any related Prospectus required by this Agreement, the Issuer and the
Guarantors shall, during the periods specified in Sections 3 and 4 hereof, as
applicable:

              (i) use their respective reasonable best efforts to keep such
         Registration Statement continuously effective and provide all requisite
         financial statements for the period specified in Section 3 or 4 of this
         Agreement, as applicable. Upon the occurrence of any event that would
         cause any such Registration Statement or the Prospectus contained
         therein (A) to contain an untrue statement of material fact or omit to
         state any material fact necessary to make the statements therein, in
         the light of the circumstances under which they were made, not
         misleading or (B) not to be effective and usable for resale of Transfer
         Restricted Securities during the period required by this Agreement, the
         Issuer and the Guarantors shall file promptly an appropriate amendment
         to such Registration Statement or a supplement to the Prospectus, as
         applicable, curing such defect, and, in the case of an amendment, use
         their respective reasonable best efforts to cause such amendment to be
         declared effective as soon as practicable.

              (ii) prepare and file with the Commission such amendments and
         post-effective amendments to the applicable Registration Statement as
         may be necessary to keep such Registration Statement effective for the
         applicable period set forth in Section 3 or 4 hereof, as the case may
         be; cause the Prospectus to be supplemented by any required Prospectus
         supplement, and as so supplemented to be filed pursuant to Rule 424
         under the Act, and to comply fully with Rules 424, 430A and 462, as
         applicable, under the Act in a timely manner; and comply with the
         provisions of the Act with respect to the disposition of all securities
         covered by such Registration Statement during the applicable period in
         accordance with the intended method or methods of distribution by the
         sellers thereof set forth in such Registration Statement or supplement
         to the Prospectus;

              (iii) advise each Holder whose Transfer Restricted Securities have
         been included in a Shelf Registration Statement (in the case of the
         Shelf Registration Statement) and Affiliated Market Maker promptly and,
         if requested by such Person, confirm such advice in writing, (A) when
         the Prospectus or any Prospectus supplement or post-effective amendment
         has been filed, and, with respect to any applicable Registration
         Statement or any post-effective amendment thereto, when the same has
         become effective, (B) of any request by the Commission for amendments
         to the Registration Statement or amendments or supplements to the
         Prospectus or for additional information relating thereto, (C) of the
         issuance by the Commission of any stop order suspending the
         effectiveness of the Registration Statement under the Act or of the
         suspension by any state securities commission of the qualification of
         the Transfer Restricted Securities for offering or sale in


                                       8

<PAGE>


         any jurisdiction, or the initiation of any proceeding for any of the
         preceding purposes, and (D) of the existence of any fact or the
         happening of any event that makes any statement of a material fact made
         in the Registration Statement, the Prospectus, any amendment or
         supplement thereto or any document incorporated by reference therein
         untrue, or that requires the making of any additions to or changes in
         the Registration Statement in order to make the statements therein not
         misleading, or that requires the making of any additions to or changes
         in the Prospectus in order to make the statements therein, in the light
         of the circumstances under which they were made, not misleading. If at
         any time the Commission shall issue any stop order suspending the
         effectiveness of the Registration Statement, or any state securities
         commission or other regulatory authority shall issue an order
         suspending the qualification or exemption from qualification of the
         Transfer Restricted Securities under state securities or Blue Sky laws,
         the Issuer and the Guarantors shall use their respective reasonable
         best efforts to obtain the withdrawal or lifting of such order at the
         earliest possible time;

              (iv) subject to Section 6(c)(i), if any fact or event contemplated
         by Section 6(c)(iii)(D) hereof shall exist or have occurred, prepare a
         supplement or post-effective amendment to the Registration Statement or
         related Prospectus or any document incorporated therein by reference or
         file any other required document so that, as thereafter delivered to
         the purchasers of Transfer Restricted Securities, the Prospectus will
         not contain an untrue statement of a material fact or omit to state any
         material fact necessary to make the statements therein, in the light of
         the circumstances under which they were made, not misleading;

              (v) furnish to each Holder whose Transfer Restricted Securities
         have been included in a Shelf Registration Statement (in the case of
         the Shelf Registration Statement) and each Affiliated Market Maker in
         connection with such sale, if any, before filing with the Commission,
         copies of any Registration Statement or any Prospectus included therein
         or any amendments or supplements to any such Registration Statement or
         Prospectus (including all documents incorporated by reference after the
         initial filing of such Registration Statement), which documents will be
         subject to the review and comment of such Persons, if any, for a period
         of at least five Business Days, and the Issuer will not file any such
         Registration Statement or Prospectus or any amendment or supplement to
         any such Registration Statement or Prospectus (including all such
         documents incorporated by reference) to which such Persons shall
         reasonably object within five Business Days after the receipt thereof.
         Such Persons shall be deemed to have reasonably objected to such filing
         if such Registration Statement, amendment, Prospectus or supplement, as
         applicable, as proposed to be filed, contains an untrue statement of a
         material fact or omits to state any material fact necessary to make the
         statements therein, in the light of the circumstances under which they
         were made, not misleading or fails to comply with the applicable
         requirements of the Act;

              (vi) promptly prior to the filing of any document that is to be
         incorporated by reference into a Registration Statement or Prospectus,
         provide copies of such document to each Holder whose Transfer
         Restricted Securities have been included in a Shelf Registration
         Statement (in the case of the Shelf Registration Statement) and each
         Affiliated Market Maker in connection with such sale or exchange, if
         any, make the Issuer's and the Guarantors' representatives available
         for discussion of such document and other customary due diligence
         matters, and include such information in such document prior to the
         filing thereof as such Persons may reasonably request;

              (vii) make available, at reasonable times, for inspection by each
         Holder whose Transfer Restricted Securities have been included in a
         Shelf Registration Statement (in the case of the Shelf


                                       9

<PAGE>


         Registration Statement) and each Affiliated Market Maker and any
         attorney or accountant retained by such Persons, all financial and
         other records, pertinent corporate documents of the Issuer and the
         Guarantors and cause the Issuer's and the Guarantors' officers,
         directors and employees to supply all information reasonably requested
         by any such Persons, attorney or accountant in connection with such
         Registration Statement or any post-effective amendment thereto
         subsequent to the filing thereof and prior to its effectiveness;

              (viii) if requested by any Holders whose Transfer Restricted
         Securities have been included in a Shelf Registration Statement (in the
         case of the Shelf Registration Statement) or any Affiliated Market
         Maker, promptly include in any Registration Statement or Prospectus,
         pursuant to a supplement or post-effective amendment if necessary, such
         information as such Persons may reasonably request to have included
         therein, including, without limitation, information relating to the
         "Plan of Distribution" of the Transfer Restricted Securities and the
         use of the Registration Statement or Prospectus for market-making
         activities; and make all required filings of such Prospectus supplement
         or post-effective amendment as soon as practicable after the Issuer is
         notified of the matters to be included in such Prospectus supplement or
         post-effective amendment;

              (ix) furnish to each Holder whose Transfer Restricted Securities
         have been included in a Shelf Registration Statement (in the case of
         the Shelf Registration Statement) in connection with such exchange or
         sale and each Affiliated Market Maker, without charge, at least one
         copy of the Registration Statement, as first filed with the Commission,
         and of each amendment thereto, including all documents incorporated by
         reference therein and all exhibits (including exhibits incorporated
         therein by reference);

              (x) deliver to each Holder whose Transfer Restricted Securities
         have been included in a Shelf Registration Statement and each
         Affiliated Market Maker without charge, as many copies of the
         Prospectus (including each preliminary Prospectus) and any amendment or
         supplement thereto as such Persons reasonably may request; the Issuer
         and the Guarantors hereby consent to the use (in accordance with law
         and subject to Section 6(d) hereof) of the Prospectus and any amendment
         or supplement thereto by each selling Person in connection with the
         offering and the sale of the Transfer Restricted Securities covered by
         the Prospectus or any amendment or supplement thereto and all
         market-making activities of such Affiliated Market Maker, as the case
         may be;

              (xi) upon the request of any Holder whose Transfer Restricted
         Securities have been included in a Shelf Registration Statement (in the
         case of the Shelf Registration Statement) or the Initial Purchaser,
         enter into such agreements (including underwriting agreements) and make
         such representations and warranties and take all such other actions in
         connection therewith in order to expedite or facilitate the disposition
         of the Transfer Restricted Securities pursuant to any applicable
         Registration Statement contemplated by this Agreement as may be
         reasonably requested by such Person in connection with any sale or
         resale pursuant to any applicable Registration Statement. In such
         connection, and also in connection with market making activities by any
         Affiliated Market Maker, the Issuer and the Guarantors shall:

              (A) upon request of any such Person, furnish (or in the case of
         paragraphs (2) and (3), use their respective reasonable best efforts to
         cause to be furnished) to each Holder (in the case of the Shelf
         Registration Statement) and the Initial Purchaser, upon Consummation of
         the Exchange Offer or upon the effectiveness of the Shelf Registration
         Statement, as the case may be:


                                       10

<PAGE>


                   (1) a certificate, dated such date, signed on behalf of the
              Issuer and each Guarantor by (x) the President or any Vice
              President and (y) a principal financial or accounting officer of
              the Issuer and such Guarantor, confirming, as of the date thereof,
              the matters set forth in Sections 9(a) and 9(b) of the Purchase
              Agreement and such other similar matters as such Person may
              reasonably request;

                   (2) an opinion, dated the date of Consummation of the
              Exchange Offer or the date of effectiveness of the Shelf
              Registration Statement, as the case may be, of counsel for the
              Issuer and the Guarantors covering matters similar to those set
              forth in Sections 9(f) and (g) of the Purchase Agreement and such
              other matters as such Person may reasonably request, and in any
              event including a statement to the effect that such counsel has
              participated in conferences with officers and other
              representatives of the Issuer and the Guarantors and
              representatives of the independent public accountants for the
              Issuer and the Guarantors and have considered the matters required
              to be stated therein and the statements contained therein,
              although such counsel has not independently verified the accuracy,
              completeness or fairness of such statements; and that such counsel
              advises that, on the basis of the foregoing (relying as to
              materiality to the extent such counsel deems appropriate upon the
              statements of officers and other representatives of the Issuer and
              the Guarantors and without independent check or verification), no
              facts came to such counsel's attention that caused such counsel to
              believe that the applicable Registration Statement, at the time
              such Registration Statement or any post-effective amendment
              thereto became effective and, in the case of the Exchange Offer
              Registration Statement, as of the date of Consummation of the
              Exchange Offer, contained an untrue statement of a material fact
              or omitted to state a material fact required to be stated therein
              or necessary to make the statements therein not misleading, or
              that the Prospectus contained in such Registration Statement as of
              its date and, in the case of the opinion dated the date of
              Consummation of the Exchange Offer, as of the date of
              Consummation, contained an untrue statement of a material fact or
              omitted to state a material fact necessary in order to make the
              statements therein, in the light of the circumstances under which
              they were made, not misleading. Without limiting the foregoing,
              such counsel may state further that such counsel assumes no
              responsibility for, and has not independently verified, the
              accuracy, completeness or fairness of the financial statements,
              notes and schedules and other financial data included in any
              Registration Statement contemplated by this Agreement or the
              related Prospectus; and

                   (3) a customary comfort letter, dated the date of
              Consummation of the Exchange Offer, or as of the date of
              effectiveness of the Shelf Registration Statement, as the case may
              be, from the Issuer's independent accountants, in the customary
              form and covering matters of the type customarily covered in
              comfort letters to underwriters in connection with underwritten
              offerings, and affirming the matters set forth in the comfort
              letters delivered pursuant to Section 9(i) of the Purchase
              Agreement; and

              (B) deliver such other documents and certificates as may be
         reasonably requested by such Persons to evidence compliance with the
         matters covered in clause (A) above and with any


                                       11

<PAGE>


         customary conditions contained in any agreement entered into by the
         Issuer and the Guarantors pursuant to this clause (xi);

              (xii) prior to any public offering of Transfer Restricted
         Securities, cooperate with the selling Holders and their counsel in
         connection with the registration and qualification of the Transfer
         Restricted Securities under the securities or Blue Sky laws of such
         jurisdictions as the selling Holders may request and do any and all
         other acts or things necessary or advisable to enable the disposition
         in such jurisdictions of the Transfer Restricted Securities covered by
         the applicable Registration Statement; provided that neither the Issuer
         nor any Guarantor shall be required to register or qualify as a foreign
         corporation where it is not now so qualified or to take any action that
         would subject it to the service of process in suits or to taxation,
         other than as to matters and transactions relating to the Registration
         Statement, in any jurisdiction where it is not now so subject;

              (xiii) in connection with any sale of Transfer Restricted
         Securities that will result in such securities no longer being Transfer
         Restricted Securities, cooperate with the Holders to facilitate the
         timely preparation and delivery of certificates representing Transfer
         Restricted Securities to be sold and not bearing any restrictive
         legends; and to register such Transfer Restricted Securities in such
         denominations and such names as the selling Holders may request at
         least two Business Days prior to such sale of Transfer Restricted
         Securities;

              (xiv) use their respective reasonable best efforts to cause the
         disposition of the Transfer Restricted Securities covered by the
         Registration Statement to be registered with or approved by such other
         governmental agencies or authorities as may be necessary to enable the
         seller or sellers thereof to consummate the disposition of such
         Transfer Restricted Securities, subject to the proviso contained in
         clause (xii) above;

              (xv) provide a CUSIP number for all Transfer Restricted Securities
         not later than the effective date of a Registration Statement covering
         such Transfer Restricted Securities and provide the Trustee under the
         Indenture with printed certificates for the Transfer Restricted
         Securities which are in a form eligible for deposit with The Depository
         Trust Company;

              (xvi) otherwise use their respective reasonable best efforts to
         comply with all applicable rules and regulations of the Commission, and
         make generally available to their security holders with regard to any
         applicable Registration Statement, as soon as practicable, a
         consolidated earnings statement meeting the requirements of Rule 158
         under the Act (which need not be audited) covering a twelve-month
         period beginning after the effective date of the Registration Statement
         (as such term is defined in Rule 158(c) under the Act);

              (xvii) cause the Indenture to be qualified under the TIA not later
         than the effective date of the first Registration Statement required by
         this Agreement and, in connection therewith, cooperate with the Trustee
         and the Holders to effect such changes to the Indenture as may be
         required for such Indenture to be so qualified in accordance with the
         terms of the TIA; and execute and use its reasonable best efforts to
         cause the Trustee to execute, all documents that may be required to
         effect such changes and all other forms and documents required to be
         filed with the Commission to enable such Indenture to be so qualified
         in a timely manner; and


                                       12

<PAGE>


              (xviii) provide promptly to each Holder and Affiliated Market
         Maker, upon request, each document filed with the Commission pursuant
         to the requirements of Section 13 or Section 15(d) of the Exchange Act.

         (d) Restrictions on Holders. Each Holder agrees by acquisition of a
Transfer Restricted Security and each Affiliated Market Maker agrees that, upon
receipt of the notice referred to in Section 6(c)(iii)(C) or any notice from the
Issuer of the existence of any fact of the kind described in Section
6(c)(iii)(D) hereof (in each case, a "Suspension Notice"), such Person will
forthwith discontinue disposition of Transfer Restricted Securities pursuant to
the applicable Registration Statement until (i) such Person has received copies
of the supplemented or amended Prospectus contemplated by Section 6(c)(iv)
hereof, or (ii) such Person is advised in writing by the Issuer that the use of
the Prospectus may be resumed, and has received copies of any additional or
supplemental filings that are incorporated by reference in the Prospectus (in
each case, the "Recommencement Date"). Each Person receiving a Suspension Notice
hereby agrees that it will either (i) destroy any Prospectuses, other than
permanent file copies, then in such Person's possession which have been replaced
by the Issuer with more recently dated Prospectuses or (ii) deliver to the
Issuer (at the Issuer's expense) all copies, other than permanent file copies,
then in such Person's possession of the Prospectus covering such Transfer
Restricted Securities that was current at the time of receipt of the Suspension
Notice. The time period regarding the effectiveness of such Registration
Statement set forth in Section 3 or 4 hereof, as applicable, shall be extended
by a number of days equal to the number of days in the period from and including
the date of delivery of the Suspension Notice to the date of delivery of the
Recommencement Date.

SECTION 7.  REGISTRATION EXPENSES

         (a) All expenses incident to the Issuer's and the Guarantors'
performance of or compliance with this Agreement will be borne by the Issuer,
regardless of whether a Registration Statement becomes effective, including,
without limitation: (i) all registration and filing fees and expenses; (ii) all
fees and expenses of compliance with federal securities and state Blue Sky or
securities laws; (iii) all expenses of printing (including printing certificates
for the Series B Notes to be issued in the Exchange Offer and printing of
Prospectuses (whether for exchanges, sales, market-making or otherwise),
messenger and delivery services and telephone; (iv) all fees and disbursements
of counsel for the Issuer and the Guarantors; (v) all application and filing
fees in connection with listing the Series B Notes on a national securities
exchange or automated quotation system pursuant to the requirements hereof; and
(vi) all fees and disbursements of independent certified public accountants of
the Issuer and the Guarantors (including the expenses of any special audit and
comfort letters required by or incident to such performance).

         The Issuer will, in any event, bear its and the Guarantors' internal
expenses (including, without limitation, all salaries and expenses of its
officers and employees performing legal or accounting duties), the expenses of
any annual audit and the fees and expenses of any Person, including special
experts, retained by the Issuer and the Guarantors.

         (b) In connection with any Registration Statement required by this
Agreement (including, without limitation, the Exchange Offer Registration
Statement and the Shelf Registration Statement), the Issuer and the Guarantors
will reimburse the Initial Purchaser and the Holders of Transfer Restricted
Securities who are tendering Series A Notes in the Exchange Offer and/or selling
or reselling Series A Notes or Series B Notes pursuant to the "Plan of
Distribution" contained in the Exchange Offer Registration Statement or the
Shelf Registration Statement, as applicable, for the reasonable fees and
disbursements of not more than one counsel, who shall be chosen by the Holders
of a majority in


                                       13

<PAGE>


principal amount of the Transfer Restricted Securities for whose benefit such
Registration Statement is being prepared.

SECTION 8.  INDEMNIFICATION

         (a) The Issuer and the Guarantors agree, jointly and severally, to
indemnify and hold harmless each Holder, its directors, officers and each
Person, if any, who controls such Holder (within the meaning of Section 15 of
the Act or Section 20 of the Exchange Act), from and against any and all losses,
claims, damages, liabilities, judgments, (including, without limitation, any
legal or other expenses incurred in connection with investigating or defending
any matter, including any action that could give rise to any such losses,
claims, damages, liabilities or judgments) caused by any untrue statement or
alleged untrue statement of a material fact contained in any Registration
Statement, preliminary Prospectus or Prospectus (or any amendment or supplement
thereto) provided by the Issuer to any Holder or any prospective purchaser of
Series B Notes or registered Series A Notes, or caused by any omission or
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading, except insofar as
such losses, claims, damages, liabilities or judgments are caused by an untrue
statement or omission or alleged untrue statement or omission that is based upon
information relating to any of the Holders furnished in writing to the Issuer by
any of the Holders.

         (b) Each Holder of Transfer Restricted Securities agrees, severally and
not jointly, to indemnify and hold harmless the Issuer and the Guarantors, their
respective directors and officers, and each person, if any, who controls (within
the meaning of Section 15 of the Act or Section 20 of the Exchange Act) the
Issuer or the Guarantors, to the same extent as the foregoing indemnity from the
Issuer and the Guarantors set forth in Section 8(a) hereof, but only with
reference to information relating to such Holder furnished in writing to the
Issuer by such Holder expressly for use in any Registration Statement. In no
event shall any Holder, its directors, officers or any Person who controls such
Holder be liable or responsible for any amount in excess of the amount by which
the total amount received by such Holder with respect to its sale of Transfer
Restricted Securities pursuant to a Registration Statement exceeds (i) the
amount paid by such Holder for such Transfer Restricted Securities and (ii) the
amount of any damages that such Holder, its directors, officers or any Person
who controls such Holder has otherwise been required to pay by reason of such
untrue or alleged untrue statement or omission or alleged omission.

         (c) In case any action shall be commenced involving any person in
respect of which indemnity may be sought pursuant to Section 8(a) or 8(b) (the
"indemnified party"), the indemnified party shall promptly notify the person
against whom such indemnity may be sought (the "indemnifying person") in
writing, and the indemnifying party shall assume the defense of such action,
including the employment of counsel reasonably satisfactory to the indemnified
party and the payment of all fees and expenses of such counsel, as incurred
(except that, in the case of any action in respect of which indemnity may be
sought pursuant to both Sections 8(a) and 8(b), a Holder shall not be required
to assume the defense of such action pursuant to this Section 8(c), but may
employ separate counsel and participate in the defense thereof, but the fees and
expenses of such counsel, except as provided below, shall be at the expense of
the Holder). Any indemnified party shall have the right to employ separate
counsel in any such action and participate in the defense thereof, but the fees
and expenses of such counsel shall be at the expense of the indemnified party,
unless (i) the employment of such counsel shall have been specifically
authorized in writing by the indemnifying party, (ii) the indemnifying party
shall have failed to assume the defense of such action or employ counsel
reasonably satisfactory to the indemnified party or (iii) the named parties to
any such action (including any impleaded parties) include both the


                                       14

<PAGE>


indemnified party and the indemnifying party, and the indemnified party shall
have been advised by such counsel that there may be one or more legal defenses
available to it which are different from or additional to those available to the
indemnifying party (in which case the indemnifying party shall not have the
right to assume the defense of such action on behalf of the indemnified party).
In any such case, the indemnifying party shall not, in connection with any one
action or separate but substantially similar or related actions in the same
jurisdiction arising out of the same general allegations or circumstances, be
liable for the fees and expenses of more than one separate firm of attorneys (in
addition to any local counsel) for all indemnified parties and all such fees and
expenses shall be reimbursed as they are incurred. Such firm shall be designated
in writing by a majority of the Holders, in the case of the parties indemnified
pursuant to Section 8(a), and by the Issuer and the Guarantors, in the case of
parties indemnified pursuant to Section 8(b). The indemnifying party shall
indemnify and hold harmless the indemnified party from and against any and all
losses, claims, damages, liabilities and judgments by reason of any settlement
of any action (i) effected with its written consent or (ii) effected without its
written consent if the settlement is entered into more than twenty Business Days
after the indemnifying party shall have received a request from the indemnified
party for reimbursement for the fees and expenses of counsel (in any case where
such fees and expenses are at the expense of the indemnifying party) and, prior
to the date of such settlement, the indemnifying party shall have failed to
comply with such reimbursement request. No indemnifying party shall, without the
prior written consent of the indemnified party, effect any settlement or
compromise of, or consent to the entry of judgment with respect to, any pending
or threatened action in respect of which the indemnified party is or could have
been a party and indemnity or contribution may be or could have been sought
hereunder by the indemnified party, unless such settlement, compromise or
judgment (i) includes an unconditional release of the indemnified party from all
liability on claims that are or could have been the subject matter of such
action and (ii) does not include a statement as to or an admission of fault,
culpability or a failure to act, by or on behalf of the indemnified party.

         (d) To the extent that the indemnification provided for in this Section
8 is unavailable to an indemnified party in respect of any losses, claims,
damages, liabilities or judgments referred to therein, then each indemnifying
party, in lieu of indemnifying such indemnified party, shall contribute to the
amount paid or payable by such indemnified party as a result of such losses,
claims, damages, liabilities or judgments (i) in such proportion as is
appropriate to reflect the relative benefits received by the Issuer and the
Guarantors, on the one hand, and the Holders, on the other hand, from their sale
of Transfer Restricted Securities or (ii) if the allocation provided by clause
8(d)(i) is not permitted by applicable law, in such proportion as is appropriate
to reflect not only the relative benefits referred to in clause 8(d)(i) hereof
but also the relative fault of the Issuer and the Guarantors, on the one hand,
and of the Holder, on the other hand, in connection with the statements or
omissions which resulted in such losses, claims, damages, liabilities or
judgments, as well as any other relevant equitable considerations. The relative
fault of the Issuer and the Guarantors, on the one hand, and of the Holder, on
the other hand, shall be determined by reference to, among other things, whether
the untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by the
Issuer or such Guarantor, on the one hand, or by the Holder, on the other hand,
and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. The amount paid or
payable by an indemnified party as a result of the losses, claims, damages,
liabilities or judgments referred to above shall be deemed to include, subject
to the limitations set forth in the second paragraph of Section 8(a), any legal
or other fees or expenses reasonably incurred by such indemnified party in
connection with investigating or defending any matter, including any action that
could have given rise to such losses, claims, damages, liabilities or judgments.


                                       15

<PAGE>


         The Issuer, the Guarantors and each Holder agree that it would not be
just and equitable if contribution pursuant to this Section 8(d) were determined
by pro rata allocation (even if the Holders were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to in the immediately preceding paragraph.
Notwithstanding the provisions of this Section 8, no Holder, its directors, its
officers or any Person, if any, who controls such Holder shall be required to
contribute, in the aggregate, any amount in excess of the amount by which the
total received by such Holder with respect to the sale of Transfer Restricted
Securities pursuant to a Registration Statement exceeds (i) the amount paid by
such Holder for such Transfer Restricted Securities and (ii) the amount of any
damages which such Holder has otherwise been required to pay by reason of such
untrue or alleged untrue statement or omission or alleged omission. No person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Act) shall be entitled to contribution from any person who was not guilty of
such fraudulent misrepresentation. The Holders' obligations to contribute
pursuant to this Section 8(d) are several in proportion to the respective
principal amount of Transfer Restricted Securities held by each Holder hereunder
and not joint.

         (e) The Issuer and the Guarantors agree that the indemnity and
contribution provisions of this Section 8 shall apply to the Affiliated Market
Makers to the same extent and on the same conditions, as it applies to Holders.

SECTION 9.  RULE 144A and RULE 144

         The Issuer and each Guarantor agrees with each Holder, for so long as
any Transfer Restricted Securities remain outstanding and during any period in
which the Issuer or such Guarantor (i) is not subject to Section 13 or 15(d) of
the Exchange Act, to make available, upon request of any Holder, to such Holder
or beneficial owner of Transfer Restricted Securities in connection with any
sale thereof and any prospective purchaser of such Transfer Restricted
Securities designated by such Holder or beneficial owner, the information
required by Rule 144A(d)(4) under the Act in order to permit resales of such
Transfer Restricted Securities pursuant to Rule 144A, and (ii) is subject to
Section 13 or 15(d) of the Exchange Act, to make all filings required thereby in
a timely manner in order to permit resales of such Transfer Restricted
Securities pursuant to Rule 144.

SECTION 10.  MISCELLANEOUS

         (a) Remedies. The Issuer and the Guarantors acknowledge and agree that
any failure by the Issuer and/or the Guarantors to comply with their respective
obligations under Sections 3 and 4 hereof may result in material irreparable
injury to the Initial Purchaser or the Holders or Affiliated Market Makers for
which there is no adequate remedy at law, that it will not be possible to
measure damages for such injuries precisely and that, in the event of any such
failure, the Initial Purchaser or any Holder or Affiliated Market Makers may
obtain such relief as may be required to specifically enforce the Issuer's and
the Guarantors' obligations under Sections 3 and 4 hereof. The Issuer and the
Guarantors further agrees to waive the defense in any action for specific
performance that a remedy at law would be adequate.

         (b) No Inconsistent Agreements. Neither the Issuer nor any Guarantor
will, on or after the date of this Agreement, enter into any agreement with
respect to its securities that is inconsistent with the rights granted to the
Holders in this Agreement or otherwise conflicts with the provisions hereof.
Neither the Issuer nor any Guarantor has previously entered into any agreement
that will remain in effect after the issuance of the Notes granting any
registration rights with respect to its securities to any Person. The


                                       16

<PAGE>


rights granted to the Holders hereunder do not in any way conflict with and are
not inconsistent with the rights granted to the holders of the Issuer's and the
Guarantors' securities under any agreement in effect on the date hereof.

         (c) Amendments and Waivers. The provisions of this Agreement may not be
amended, modified or supplemented, and waivers or consents to or departures from
the provisions hereof may not be given unless (i) in the case of Section 5
hereof and this Section 10(c)(i), the Issuer has obtained the written consent of
Holders of all outstanding Transfer Restricted Securities, and (ii) in the case
of all other provisions hereof, the Issuer has obtained the written consent of
Holders of a majority of the outstanding principal amount of Transfer Restricted
Securities (excluding Transfer Restricted Securities held by the Issuer or its
Affiliates). Notwithstanding the foregoing, a waiver or consent to departure
from the provisions hereof that relates exclusively to the rights of Holders
whose Transfer Restricted Securities are being tendered pursuant to the Exchange
Offer, and that does not affect directly or indirectly the rights of other
Holders whose Transfer Restricted Securities are not being tendered pursuant to
such Exchange Offer, may be given by the Holders of a majority of the
outstanding principal amount of Transfer Restricted Securities subject to such
Exchange Offer.

         (d) Third Party Beneficiary. The Holders and Affiliated Market Makers
shall be third party beneficiaries to the agreements made hereunder between the
Issuer and the Guarantors, on the one hand, and the Initial Purchaser, on the
other hand, and shall have the right to enforce such agreements directly to the
extent they may deem such enforcement necessary or advisable to protect its
rights or the rights of Holders hereunder.

         (e) Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand-delivery, first-class mail
(registered or certified, return receipt requested), telecopier, or air courier
guaranteeing overnight delivery:

              (i)  if to a Holder, at the address set forth on the records of
         the Registrar under the Indenture, with a copy to the Registrar under
         the Indenture; and

              (ii) if to the Issuer or the Guarantors:

                   Charles River Laboratories, Inc.
                   251 Ballardvale Street
                   Wilmington, MA 01887
                   Telecopier No.: 978-988-5665
                   Attention:  General Counsel

                   With a copy to:

                   Davis Polk & Wardwell
                   450 Lexington Avenue
                   New York, New York 10017
                   Telecopier No.: 212-450-4000
                   Attention:  Richard D. Truesdell, Esq.

         All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; five Business
Days after being deposited in the mail, postage


                                       17

<PAGE>


prepaid, if mailed; when receipt acknowledged, if telecopied; and on the next
Business Day, if timely delivered to an air courier guaranteeing overnight
delivery.

         Copies of all such notices, demands or other communications shall be
concurrently delivered by the Person giving the same to the Trustee at the
address specified in the Indenture.

         Upon the date of filing of the Exchange Offer or a Shelf Registration
Statement, as the case may be, notice shall be delivered to Donaldson, Lufkin &
Jenrette Securities Corporation (in the form attached hereto as Exhibit A) and
shall be addressed to: Attention: Louise Guarneri (Compliance Department), 277
Park Avenue, New York, New York 10172.

         (f) Successors and Assigns. This Agreement shall inure to the benefit
of and be binding upon the successors and assigns of each of the parties,
including, without limitation, and without the need for an express assignment,
subsequent Holders; provided that nothing herein shall be deemed to permit any
assignment, transfer or other disposition of Transfer Restricted Securities in
violation of the terms hereof or of the Purchase Agreement or the Indenture. If
any transferee of any Holder shall acquire Transfer Restricted Securities in any
manner, whether by operation of law or otherwise, such Transfer Restricted
Securities shall be held subject to all of the terms of this Agreement, and by
taking and holding such Transfer Restricted Securities such Person shall be
conclusively deemed to have agreed to be bound by and to perform all of the
terms and provisions of this Agreement, including the restrictions on resale set
forth in this Agreement and, if applicable, the Purchase Agreement, and such
Person shall be entitled to receive the benefits hereof.

         (g) Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

         (h) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

         (i) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE
CONFLICT OF LAW RULES THEREOF.

         (j) Severability. In the event that any one or more of the provisions
contained herein, or the application thereof in any circumstance, is held
invalid, illegal or unenforceable, the validity, legality and enforceability of
any such provision in every other respect and of the remaining provisions
contained herein shall not be affected or impaired thereby.

         (k) Entire Agreement. This Agreement is intended by the parties as a
final expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the subject matter contained herein. There are no restrictions, promises,
warranties or undertakings, other than those set forth or referred to herein
with respect to the registration rights granted with respect to the Transfer
Restricted Securities. This Agreement supersedes all prior agreements and
understandings between the parties with respect to such subject matter.


                                       18

<PAGE>


         (l) Compliance with Form S-3. The Issuer agrees for the benefit of any
Affiliated Market Makers that for so long as any of the Transfer Restricted
Securities remain outstanding, if at any time sales by the Affiliated Market
Makers of the Transfer Restricted Securities will satisfy clauses 1 or 3 of the
"Transaction Requirements" specified in Form S-3 (or any comparable provision of
any successor form to Form S-3), the Issuer will use its reasonable best efforts
to comply with, and maintain its compliance with, the "Registrant Requirements"
of Form S-3 (or any comparable provision of any successor form to Form S-3).


                                       19

<PAGE>


         IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first written above.

                                     CHARLES RIVER LABORATORIES, INC.

                                     By:
                                         ---------------------------------------
                                         Name:
                                         Title:


                                     SBI HOLDINGS, INC.

                                     By:
                                         ---------------------------------------
                                         Name:
                                         Title:


                                     SIERRA BIOMEDICAL, INC.

                                     By:
                                         ---------------------------------------
                                         Name:
                                         Title:


                                     SIERRA BIOMEDICAL SAN DIEGO, INC.

                                     By:
                                         ---------------------------------------
                                         Name:
                                         Title:



DONALDSON, LUFKIN & JENRETTE
   SECURITIES CORPORATION

By:
    ---------------------------------------
    Name:
    Title:


<PAGE>


                                    EXHIBIT A

                               NOTICE OF FILING OF
                    A/B EXCHANGE OFFER REGISTRATION STATEMENT

To:      Donaldson, Lufkin & Jenrette Securities Corporation
         277 Park Avenue
         New York, New York  10172
         Attention:  Louise Guarneri (Compliance Department)
         Fax: 212-892-7272

From:    Charles River Laboratories, Inc.
         251 Ballardvale Street
         Wilmington, MA 01887
         Attention: General Counsel
         Fax: 978-988-5665
         13 1/2% Senior Subordinated Notes due 2009

Date: ___________, 1999

         For your information only (NO ACTION REQUIRED):

         Today, ___________, 1999, we filed [an A/B Exchange Registration
Statement/a Shelf Registration Statement] with the Securities and Exchange
Commission.



                           RECAPITALIZATION AGREEMENT

                                      Among

                           BAUSCH & LOMB INCORPORATED,

                                 ENDOSAFE, INC.,

                               CRL HOLDINGS, INC.,

          CHARLES RIVER LABORATORIES, INC., CHARLES RIVER SPAFAS, INC.,

                       BAUSCH & LOMB INTERNATIONAL, INC.,

                           WILMINGTON PARTNERS, L.P.,

                           BAUSCH & LOMB CANADA, INC.,

                               CRL ACQUISITION LLC

                                       and

                     DLJ MERCHANT BANKING PARTNERS II, L.P.

                            Dated as of July 25, 1999


<PAGE>

                                TABLE OF CONTENTS

                                                                           Page

Article 1            DEFINITIONS, ETC.........................................2

    1.1      Definitions......................................................2
    1.2      Construction....................................................14
    1.3      Accounting Conventions..........................................15
    1.4      Disclosure Schedule.............................................15

Article 2            REORGANIZATION, MERGER RECAPITALIZATION,
                     REDEMPTIONS AND CLOSING.................................15

    2.1      Reorganization; Merger..........................................15
    2.2      Recapitalization of Recap Co....................................16
    2.3      Redemptions.....................................................16
    2.4      Closing.........................................................17

Article 3            REPRESENTATIONS AND WARRANTIES OF SELLER PARENT.........17

    3.1      Organization, Good Standing and Power...........................17
    3.2      Authorization and Validity......................................18
    3.3      Capitalization of Recap Subco and Recap Subsidiaries............18
    3.4      Consent and Approvals; No Conflict..............................19
    3.5      Purchased Shares in Merger......................................19
    3.6      Financial Statements............................................19
    3.7      Absence of Undisclosed Liabilities..............................20
    3.8      Absence of Certain Changes......................................20
    3.9      Entire CRL Business.............................................21
    3.10     Legal Proceedings...............................................21
    3.11     Employees and Labor Relations Matters...........................22
    3.12     CRL Business Tangible Assets; Real Property.....................22
    3.13     Intellectual Property...........................................23
    3.14     Compliance with Applicable Laws.................................23
    3.15     Employee Benefit Plans..........................................24
    3.16     Environmental Matters...........................................26
    3.17     Tax Matters.....................................................27
    3.18     Contracts.......................................................27
    3.19     Certain Fees....................................................28
    3.20     Year 2000.......................................................28
    3.21     Insider Interests; Intercompany Transactions....................28
    3.22     No Other Representations or Warranties..........................28

Article 4            REPRESENTATIONS AND WARRANTIES OF BUYER
                     AND BUYER PARENT........................................29

    4.1      Organization, Good Standing and Power...........................29


                                      i

<PAGE>

    4.2      Authorization and Validity of Agreements........................29
    4.3      Consents and Approvals; No Conflict.............................29
    4.4      Legal Proceedings...............................................30
    4.5      Certain Fees....................................................30
    4.6      Financing.......................................................30
    4.7      Access and Investigation........................................30
    4.8      No Other Representations or Warranties..........................31

Article 5            COVENANTS OF THE PARTIES................................31

    5.1      Access to Information; Confidentiality..........................31
    5.2      Approvals under Competition Laws................................32
    5.3      Conduct of the CRL Business Pending the Closing Date............32
    5.4      Consents........................................................33
    5.5      Tax Matters.....................................................34
    5.6      Employee Matters................................................35
    5.7      Additional Assurances...........................................36
    5.8      Updated Disclosure Schedule.....................................37
    5.9      Buyer's Insurance...............................................38
    5.10     Cash Management.................................................38
    5.11     Company Acquisition Proposal....................................38
    5.12     Books and Records...............................................39
    5.13     Use of Names....................................................39
    5.14     Commitment Letters..............................................39
    5.15     Broekman Sale...................................................39
    5.16     Stage I Reorganization Matters..................................40
    5.17     Confidential Information........................................40
    5.18     Closing Efforts.................................................40
    5.19     Interim Financial Statements....................................40
    5.20     Financial Assurances............................................41
    5.21     Financial Statements............................................41
    5.22     Net Underfunding Amount.........................................42

Article 6            CONDITIONS TO CLOSING...................................42

    6.1      Conditions to Obligations of Buyer and Seller Parent and
             Recap Co........................................................42
    6.2      Conditions to Obligations of Buyer..............................43
    6.3      Conditions to Obligations of Seller Parent, the Sellers,
             Recap Co and Recap Subco........................................45

Article 7            TERMINATION AND ABANDONMENT.............................45

    7.1      Termination.....................................................45
    7.2      Effect of Termination and Abandonment...........................46

Article 8            SURVIVAL AND INDEMNIFICATION............................47

    8.1      Survival of Representations, Warranties and Covenants...........47


                                      ii

<PAGE>


    8.2      Indemnification by Seller Parent................................47
    8.3      Indemnification by Recap Co.....................................47
    8.4      Certain Limitations on Indemnities..............................48
    8.5      Procedure.......................................................49
    8.6      No Consequential Damages........................................50
    8.7      Exclusive Remedy................................................50
    8.8      Validity........................................................50
    8.9      Waiver..........................................................51

Article 9            MISCELLANEOUS...........................................51

    9.1      Public Announcement.............................................51
    9.2      Expenses........................................................51
    9.3      Transfer Taxes and Recording Expenses...........................52
    9.4      Knowledge.......................................................52
    9.5      Notices.........................................................52
    9.6      Severability....................................................54
    9.7      Specific Performance............................................54
    9.8      No Conflict of Interest.........................................54
    9.9      Binding Effect; Benefit.........................................54
    9.10     Assignability...................................................54
    9.11     Amendment, Waiver...............................................55
    9.12     Section Headings................................................55
    9.13     Counterparts....................................................55
    9.14     Applicable Law..................................................55
    9.15     Submission to Jurisdiction......................................55
    9.16     Entire Agreement................................................56




<PAGE>


                           RECAPITALIZATION AGREEMENT

           This Recapitalization Agreement is made as of the 25th day of July,
1999, by and among Bausch & Lomb Incorporated, a New York corporation ("Seller
Parent"), Endosafe, Inc., a Delaware corporation ("Recap Co"), CRL Holdings,
Inc., a Delaware corporation ("Recap Subco"), Charles River Laboratories, Inc.,
a Delaware corporation ("CRL"), Charles River SPAFAS, Inc., a Delaware
corporation ("SPAFAS"), Bausch & Lomb International, Inc., a New York
corporation ("International"), Wilmington Partners, L.P., a Delaware limited
partnership ("WPLP"), Bausch & Lomb Canada, Inc., a Canadian corporation
("Parent Canada"), CRL Acquisition LLC, a Delaware limited liability company
("Buyer"), and DLJ Merchant Banking Partners II, L.P., a Delaware limited
partnership ("Buyer Parent"). Certain terms which are capitalized in this
Agreement are used with the meanings ascribed thereto in Section 1.1.

                                    RECITALS

           Recap Subco, directly and through its direct and indirect
subsidiaries, together with WPLP and Parent Canada, are engaged in the CRL
Business.

           Seller Parent, through CRL, SPAFAS and International, owns all of the
issued and outstanding shares of capital stock of Recap Subco.

           Immediately prior to the Closing, Seller Parent, WPLP and Parent
Canada shall cause the reorganization to occur so that at the Closing, (i) Recap
Subco, or a subsidiary thereof, shall own all of the assets used in the CRL
Business (other than the Excluded Assets), (ii) Recap Subco shall be a wholly
owned subsidiary of Recap Co and (iii) CRL, SPAFAS, International and WPLP shall
own all of the issued and outstanding shares of capital stock of Recap Co.

           Immediately prior to the Closing, Buyer Parent shall cause Buyer to
be capitalized with at least $90,000,000, Acquisition Co to be formed and
capitalized by Buyer with at least $90,000,000 and Acquisition Co to be merged
with and into Recap Co.

           Upon the terms and subject to the conditions set forth in this
Agreement, at the Closing, Seller Parent shall cause Recap Co and Recap Subco to
incur indebtedness to facilitate the recapitalization of Recap Co, and Buyer
shall assist Recap Co and Recap Subco in incurring such indebtedness.

           At the Closing, immediately following the incurrence of the foregoing
indebtedness, Seller Parent and Buyer shall cause Recap Subco to use all of the
net proceeds of such indebtedness incurred by it to declare and pay a dividend
to Recap Co.

           Immediately following the payment of such dividend, Seller Parent
shall cause Recap Co to use the proceeds of such dividend and the indebtedness
incurred by it to redeem for cash all of the shares of Recap Co Common Stock
held by SPAFAS and International and all of the shares of Recap Co Preferred
Stock held by WPLP and to redeem for cash and the Recap Co Sub Note certain
shares of Recap Co Common Stock held by CRL such that immediately thereafter CRL
shall own 12.5% of the number of issued and outstanding shares of Recap Co
Common Stock and Buyer shall own 87.5% of the number of issued and outstanding
shares of Recap Co Common Stock.

<PAGE>


                                   Article 1

                                DEFINITIONS, ETC.

     1.1   Definitions.  As used in this Agreement, the following terms shall
have the meanings set forth below:

           "Accounting Firm" means Arthur Andersen LLP or if such firm does not
accept an engagement, then an independent nationally recognized accounting firm
mutually agreed upon by Seller Parent and Buyer.

           "Acquisition Co" has the meaning set forth in Section 2.1.6.

           "Affiliate" means, with respect to any Person, any subsidiary,
officer or director of such Person and any other Person which directly or
indirectly controls, is controlled by or is under common control with such
Person, whether through the ownership of securities, by contract or otherwise.

           "Agreement" means this Recapitalization Agreement and the Exhibits
and the Disclosure Schedule to this Agreement, as the same may from time to time
be amended as provided herein.

           "Assumed Liabilities" means all liabilities and obligations of Seller
Parent, any Seller or any of the CRL Companies arising from or with respect to
the CRL Business or the CRL Business Assets, except for the Excluded
Liabilities.

           "Audited Financial Statements" has the meaning set forth in Section
5.21.

           "Balance Sheet" means the December 26, 1998 balance sheet of the CRL
Business included in the Audited Financial Statements.

           "Balance Sheet Date" means December 26, 1998.

           "Benefit Plan" has the meaning set forth in Section 3.15.1.

           "Broekman Sale" has the meaning set forth in Section 5.15.

           "Business Day" means any day other than a day when the commercial
banks doing business in New York or Massachusetts are required or permitted by
Law to be closed for business.

           "Buyer" has the meaning set forth at the beginning of this Agreement.

           "Buyer's Group" means, collectively, Buyer and Buyer Parent.

           "Buyer Indemnified Parties" has the meaning set forth in Section 8.2.

           "Buyer Material Adverse Effect" means one or more adverse changes
which, individually or in the aggregate, is or would reasonably be expected to
materially adversely effect the ability

                                       2

<PAGE>

of Buyer or Buyer Parent to consummate the transactions contemplated by this
Agreement on the terms and conditions and within the time frame set forth
herein.

           "Buyer Parent" has the meaning set forth at the beginning of this
Agreement.

           "CERCLA" has the meaning set forth in Section 3.16.

           "Claim" has the meaning set forth in Section 8.5.

           "Closing" has the meaning set forth in Section 2.6.

           "Closing Date" has the meaning set forth in Section 2.6.

           "Code" means the Internal Revenue Code of 1986, as amended, and the
Treasury regulations issued thereunder.

           "Commercial Efforts" means diligent, good faith efforts which shall
not require the performing party to (i) take any action which is unreasonable
under the circumstances, (ii) make any investment or capital contribution not
expressly contemplated by this Agreement or the Commitment Letters, (iii) amend
or waive any rights under this Agreement or the Commitment Letters, or (iv)
incur or expend any amount of funds with respect to any matter in excess of
$5,000 but, notwithstanding the foregoing, Commercial Efforts shall require the
expenditure of all reasonable out-of-pocket expenses necessary to satisfy a
party's obligations under this Agreement, including the fees, expenses and
disbursements of accountants, counsel, investment bankers and other
professionals.

           "Commitment Letters" means those commitment letters attached hereto
as Exhibit 4.6.

           "Company Acquisition Proposal" has the meaning set forth in Section
5.11.

           "Computer Systems" has the meaning set forth in Section 3.20.

           "Confidentiality Agreement" has the meaning set forth in Section 5.1.

           "Contracts" has the meaning set forth in Section 3.18.

           "Contribution Agreements" has the meaning set forth in the definition
of Stage 1 Reorganization.

           "Cost" means, collectively, Losses and Litigation Expenses which are
not unconditionally covered by insurance (provided that if the CRL Business is
unconditionally entitled to insurance with respect to such Loss or Litigation
Expense, such insurance proceeds shall be applied to the Loss or Litigation
Expense).

           "CRL" has the meaning set forth at the beginning of this Agreement.

           "CRL Business" means the businesses conducted by Seller Parent
through its direct and indirect subsidiaries, including, as of the date hereof,
Recap Subco, the Recap Subsidiaries, WPLP and Parent Canada and, prior to the
Stage 1 Reorganization, also through CRL, SPAFAS

                                       3

<PAGE>

and International, in each case relating to (i) the production, supply and
resale of laboratory animals for use in pharmaceutical and other medical testing
(the "Research Models"), (ii) the production and supply of specific pathogen
free eggs for vaccine production and research, (iii) testing and monitoring of
laboratory animal colonies, (iv) special laboratory animal contract services for
the performance of studies for pharmaceutical and biotechnology companies, (v)
research services for large laboratory animals, (vi) laboratory animal facility
management, (vii) biological and analytical testing of large non-animal molecule
products, (viii) the production and supply of in vitro test kits for bacterial
endotoxin detection in parental drugs and devices, (ix) the production and
supply of monoclonal and polyclonal antibodies, and (x) the sale of equipment
related to laboratory animal production and maintenance.

           "CRL Business Assets" means the CRL Business and all of Seller
Parent's, each of the Sellers' and each CRL Companies' right, title and interest
in and to all of the assets, rights and properties of every kind and nature,
whether real, personal or mixed, tangible or intangible, whether identifiable or
contingent, wherever located, which are related to or used in the CRL Business,
other than the Excluded Assets, which CRL Business assets, rights and properties
include, without limitation, all of the following except for the Excluded
Assets:

                     (i)       all assets shown or reflected on the Balance
                               Sheet, except for changes made therein in the
                               ordinary course of business since the Balance
                               Sheet Date and through the Closing Date;

                     (ii)      all land and other real property, all buildings
                               and other improvements located thereon, and all
                               rights, interests or appurtenances thereto which
                               are related to or used in the conduct of the CRL
                               Business;

                     (iii)     all of the fixed assets and other tangible
                               personal property, including, without limitation,
                               machinery, vehicles, tools, equipment, furniture,
                               fixtures, leasehold improvements and supplies
                               related to or used in the conduct of the CRL
                               Business wherever located (collectively, the
                               "Property"), including Property acquired through
                               the Closing Date;

                     (iv)      all research models, raw materials, components
                               and other parts, work-in-process, finished goods
                               and all other inventory whether on hand, on
                               order, in transit or held by others on a
                               consignment basis (collectively, the "Inventory")
                               related to or used in the conduct of the CRL
                               Business wherever located, including the
                               inventory shown or reflected on the Balance Sheet
                               and Inventory acquired after the Balance Sheet
                               Date and through the Closing Date, excluding only
                               such Inventory as shall have been sold in the
                               ordinary course of business after the Balance
                               Sheet Date and through the Closing Date;

                     (v)       all tradenames, tradename rights, trademarks,
                               trademark rights, licenses, patents, patent
                               rights, copyrights, copyright rights, service
                               marks, service mark rights, trade secrets, trade
                               secret rights, confidential information, mailing
                               lists, customer lists, supplier lists, market
                               studies, training and equipment manuals, trade
                               dress, designs, patterns, technology, trade

                                       4

<PAGE>

                               secrets, and manufacturing, engineering,
                               technical and any other know-how processes,
                               business opportunities, and businesses, projects
                               and products planned or under development, other
                               intellectual property rights (including without
                               limitation, all goodwill associated with any of
                               the foregoing, licenses in respect of any of the
                               foregoing, applications relating to any of the
                               foregoing and claims for infringement of or
                               interference with any of the foregoing) and other
                               proprietary information related to or used in the
                               conduct of the CRL Business, in any case whether
                               domestic or foreign or registered or common law
                               including, without limitation, the names "Charles
                               River Laboratories," "Charles River" and "SPAFAS"
                               and all variations thereof (collectively,
                               "Intellectual Property");

                     (vi)      all receivables related to the CRL Business,
                               including, without limitation, trade accounts and
                               other accounts receivable, loans receivable and
                               advances as at the Balance Sheet Date and all
                               receivables related to the CRL Business acquired
                               or created after the Balance Sheet Date and
                               through the Closing Date (collectively, the
                               "Receivables"), excluding only such Receivables
                               as shall have been collected on or prior to the
                               Closing Date;

                     (vii)     all contracts of or related to the CRL Business,
                               including without limitation, the Material
                               Contracts and all contracts relating to the
                               Benefit Plans and Non-US Benefit Plans;

                     (viii)    all goodwill, other intangible property, and
                               causes of action, actions, claims, rights and
                               remedies of any kind as against others (whether
                               by contract or otherwise) relating to the CRL
                               Business or any of the other CRL Business Assets
                               or Seller Parent, any of the Sellers or any of
                               the CRL Companies in the conduct or operation of
                               the CRL Business (including without limitation,
                               the Intellectual Property) or the Assumed
                               Liabilities;

                     (ix)      all books and records (financial, accounting and
                               other), correspondence, and all sales, marketing,
                               advertising, packaging and promotional materials,
                               files, data (whether written, on disk, film, tape
                               or other media, and including all computerized
                               data), drawings, engineering and manufacturing
                               data and other technical information and data,
                               and all other business and other records, in each
                               case relating to Recap Subco, any Recap
                               Subsidiary, WPLP, Parent Canada, the CRL Business
                               Assets, the Assumed Liabilities or the CRL
                               Business wherever located, except for any located
                               at Seller Parent in Rochester, New York;

                     (x)       all Permits to the extent legally transferable;

                     (xi)      all prepaid expenses, refunds, security and like
                               deposits and all other investments relating to
                               the CRL Business; and

                                       5
<PAGE>

                     (xii)     all proceeds of any of the foregoing (other than
                               Excluded Assets).

           "CRL Business Material Adverse Effect" means one or more adverse
changes which, individually or in the aggregate, has resulted in or would
reasonably be expected to result in either (a) the loss of $15,000,000 or more
of annual revenue by the CRL Business or (b) Costs in excess of $15,000,000;
provided, however that none of the events set forth on Schedule 1.1.3 shall
constitute a CRL Business Material Adverse Effect.

           "CRL Companies" shall mean Recap Subco, each of the Recap
Subsidiaries, WPLP and Parent Canada.

           "Default" means the occurrence of any event which of itself or with
the giving of notice or the passage of time or both would constitute a breach, a
default or an event of default under the applicable agreement, contract,
instrument or lease or would permit any party thereto to cancel or terminate
performance or seek damages or specific performance for breach or default.

           "Disclosure Schedule" means the Disclosure Schedule delivered by
Seller Parent to Buyer simultaneously with the execution of this Agreement and
shall include an Update in accordance with Section 5.8.

           "DOJ" has the meaning set forth in Section 5.2.

           "Draft Audited Financial Statements" has the meaning set forth in
Section 3.6.

           "Draft Unaudited Financial Statements" has the meaning set forth in
Section 3.6.

           "Draft Financial Statements" has the meaning set forth in Section
3.6.

           "Employees" means all of those persons employed as of the Closing
Date by any of the CRL Companies in the CRL Business, including employees who
are on disability (whether short-term or long-term) or other leave from any of
the CRL Companies.

           "Environmental Claim" means any notice or claim by any person or
entity alleging potential liability (including potential liability for
investigatory costs, cleanup costs, governmental response costs, natural
resource damages, property damages, personal injuries or penalties) arising out
of, based on or resulting from (i) the generation, treatment, storage,
transportation or recycling of any Hazardous Substance or the presence, or
release, discharge, disposal or emission into the environment, of any Hazardous
Substances at the Real Property or at any other real property, whether or not
presently or formerly owned or leased by any of the CRL Companies, or (ii) any
violation, or alleged violation, of any Environmental Laws by any of the CRL
Companies, Sellers or Seller Parent prior to the Closing Date, in each case with
respect to the CRL Business.

           "Environmental Laws" means any and all Laws of any Governmental
Entity in effect as of the Closing Date, relating to health, pollution control
or protection of the environment, including all Laws relating to the
manufacture, processing, distribution, generation, use, ownership, collection,
treatment, storage, transportation, recovery, recycling, removal, handling,
discharge, disposal, release or threatened release of any Hazardous Substances,
or regarding

                                       6
<PAGE>

exposure to, monitoring or assessment of, or remediation (including
operation and maintenance of remedial systems) of, any Hazardous Substances, or
record keeping, notification or reporting requirements respecting any Hazardous
Substances, or the on-site or off-site contamination or pollution of the
environment, or air, soil, or water quality, or air or water emissions, or
public health and safety or community right-to-know, including Laws of the
United States, Belgium, Canada, China, France, Germany, Italy, Japan, Mexico,
Netherlands, United Kingdom, Australia, Czech Republic, Hungary, Japan, Spain
and Sweden.

           "ERISA" means the Employee Retirement Income Security Act of 1974 and
all regulations promulgated thereunder, as the same have from time to time been
amended.

           "Excluded Assets" means:

                     (i)       all cash (except to the extent necessary to
                               satisfy the requirements of Section 5.10 hereof,
                               except for any cash received with respect to
                               divested assets pursuant to Section 5.2.2 hereof,
                               except an amount equal to 50% of all indebtedness
                               of Charles River Japan, Inc. for borrowed money
                               evidenced by a note, bond, debenture or similar
                               instrument, except an amount equal to the Net
                               Underfunding Amount and except any net proceeds
                               arising from the sale of assets referred to in
                               item 6 of Schedule 3.8, all of which shall
                               constitute CRL Business Assets and all of which
                               shall be held by Recap Co, Recap Subco or one of
                               the U.S. wholly owned Recap Subsidiaries) and
                               cash equivalents of the CRL Business, Recap
                               Subco, Recap Co and the Recap Subsidiaries on the
                               date immediately preceding the Closing Date;

                     (ii)      (A) all books and records relating to the CRL
                               Business that are located at Seller Parent in
                               Rochester, New York and (B) all books and records
                               relating to the CRL Business that are located in
                               Wilmington, Massachusetts or at any of the Recap
                               Subsidiaries which are required to be retained by
                               Seller Parent, CRL, WPLP, SPAFAS, International
                               or Parent Canada pursuant to any applicable Law
                               (in the case of (A) and (B) of this clause,
                               copies of such books and records, to the extent
                               related to the CRL Business, shall be provided to
                               Buyer, Recap Co and the Recap Subsidiaries upon
                               request);

                     (iii)     all Tax assets of Recap Co and the Recap
                               Subsidiaries which relate to pre-closing periods;

                     (iv)      all assets set forth on Schedule 1.1.1(iv);
                               provided, however, in the event the Broekman Sale
                               is not consummated on or after the Closing Date,
                               item 2 on Schedule 1.1.1(iv) shall not be an
                               Excluded Asset; and

                     (v)       all Receivables from Seller Parent or any
                               Affiliate of Seller Parent which is not one of
                               the CRL Companies.

           "Excluded Debt" shall mean, with respect to Seller Parent, any
Seller, Recap Subco or any Recap Subsidiary, without duplication, (i) all
indebtedness of Seller Parent, any Seller,

                                       7
<PAGE>

Recap Subco or any Recap Subsidiary for borrowed money, and all indebtedness
evidenced by notes, bonds, debentures or similar instruments, (ii) the deferred
purchase price of assets or services which in accordance with GAAP would be
shown on the liability side of the balance sheet of Seller Parent, any Seller,
Recap Subco or any Recap Subsidiary, (iii) all indebtedness of a second Person
secured by any Lien on any property owned by Seller Parent, any Seller, Recap
Subco or any Recap Subsidiary, whether or not such indebtedness has been
assumed, (iv) all obligations under any lease of any property (whether real,
personal or mixed) by Seller Parent, any Seller, Recap Subco or any Recap
Subsidiary as lessee which, in conformity with GAAP, would be accounted for as a
capital lease on the balance sheet of such Person (each a "Capital Lease"),
other than Capital Lease obligations as of June 30, 1999 set forth on Schedule
1.1(x), (v) all net obligations of Seller Parent, any Seller, Recap Subco or any
Recap Subsidiary under interest rate agreements, swap, cap, collar or similar
agreements or instruments and (vi) all contingent obligations of Seller Parent,
any Seller, Recap Subco or any Recap Subsidiary arising from the guaranty by
Seller Parent, any Seller, Recap Subco or any Recap Subsidiary of Excluded Debt
of other Persons; provided, however, that Excluded Debt which is owed by any
Joint Venture shall mean the product of the amount of Excluded Debt of such
Joint Venture and the percentage of the total equity interests of such Joint
Venture held by all CRL Companies (other than such Joint Venture) in such Joint
Venture.

           "Excluded Liabilities" means:

                     (i)       all debts, claims, liabilities or obligations for
                               any Tax (except for any Tax arising as a result
                               of the breach of any representation or warranty
                               contained in Article 3 other than Section 3.17)
                               (A) arising from or with respect to the CRL
                               Business Assets or the operation or conduct of
                               the CRL Business on or prior to the Closing Date,
                               including but not limited to all income taxes
                               directly arising from the deemed sale of assets
                               under the Section 338(h)(10) Election, whether or
                               not due and payable on or before the Closing Date
                               and whether or not attributable to a Tax period
                               that ends on or before the Closing Date (in which
                               event the Tax attributable to the period on or
                               prior to the Closing Date shall be determined on
                               a closing-of-the-books method, ending the close
                               of business on the Closing Date, with respect to
                               income Taxes and on a per diem basis, including
                               in such period the Closing Date, with respect to
                               all other Taxes); (B) of or attributable to any
                               Tax Sharing Agreement to which Recap Subco or any
                               Recap Subsidiary is or was a party for any period
                               on or prior to the Closing Date; and (C) for
                               which Recap Subco or any Recap Subsidiary is held
                               liable under Treasury Regulationss. 1.1502-6 or
                               any similar provisions of state, local or foreign
                               Law, which Tax is attributable to income of any
                               Person other than Recap Subco or any Recap
                               Subsidiary arising on or prior to the Closing
                               Date.

                     (ii)      all debts, claims, liabilities or obligations of
                               Seller Parent, any of the CRL Companies or
                               Sellers, in respect of accounts payable, notes
                               payable (including intercompany promissory notes
                               and similar financing arrangements) or other
                               obligations (whether or not billed or accrued) to

                                       8

<PAGE>

                               Seller Parent or any Affiliate of Seller Parent
                               which is not Recap Subco or one of the Recap
                               Subsidiaries;

                     (iii)     all debts, claims, liabilities or obligations,
                               whether presently in existence or arising after
                               the date of the Agreement, relating to fees,
                               commissions or expenses owed to any broker,
                               finder, investment banker, accountant, attorney
                               or other intermediary or advisor employed by
                               Seller Parent or any Affiliate of Seller Parent
                               in connection with the transactions contemplated
                               hereby;

                     (iv)      the Excluded Debt;

                     (v)       all debts, claims, liabilities or obligations
                               specifically arising out of or relating to any of
                               the Excluded Assets which fall within
                               subparagraphs (i), (ii), (iii), (iv) (but only
                               with respect to such debts, claims, liabilities
                               or obligations specifically arising out of or
                               related to (A) the contract for the sale of the
                               property and assets set forth in item 1 of
                               Schedule 1.1.1(iv) and (B) businesses and assets
                               of or operation or ownership thereof by the
                               entities set forth in item 3 through 7 of
                               Schedule 1.1.1(iv) other than the CRL Business or
                               the CRL Business Assets), or (v) of the
                               definition of Excluded Assets;

                     (vi)      the accrued and unpaid deferred compensation and
                               bonuses payable or accrued as of June 30, 1999 to
                               the management and other employees of the CRL
                               Business;

                     (vii)     all debts, claims, liabilities or obligations
                               arising out of or relating to the net
                               underfunding if any, of Non-U.S. Benefit Plans
                               that are defined benefit plans; provided,
                               however, that as to any Non-U.S. Benefit Plan
                               covering employees of an entity as to which a
                               third party holds an equity interest exceeding
                               15% of the total equity interests of such entity
                               (such entity being referred to herein as a "Joint
                               Venture" and such Non-U.S. Benefit Plan, a "Joint
                               Venture Non-U.S. Benefit Plan"), Excluded
                               Liabilities shall be the product of the aggregate
                               Excluded Liability of such Joint Venture as to
                               the applicable Joint Venture Non-U.S. Benefit
                               Plan and the percentage of the equity interests
                               held by all CRL Companies (other than such Joint
                               Venture) in such Joint Venture (the "Net
                               Underfunding Amount"); and

                     (viii)    the obligations under the Retention Agreements
                               with respect to Section I(A) regarding the EVA
                               Banks and with respect to Section I(B) regarding
                               the compensation for accelerated vesting of
                               Seller Parent stock options for Employees and the
                               obligations of Seller Parent or, prior to the
                               Closing Date Recap SubCo, under the Releases.

           "Expiration Date" has the meaning set forth in Section 8.1.

           "Financial Statements" has the meaning set forth in Section 5.21.

                                       9
<PAGE>

           "FTC" has the meaning set forth in Section 5.2.

           "GAAP" means generally accepted U.S. accounting principles, as in
effect at the time to which the financial statements or records relate, applied
on a consistent basis in accordance with the policies applied in the preparation
of the Financial Statements.

           "Governmental Consents" has the meaning set forth in Section
6.1.1(b).

           "Governmental Entity" means, collectively, the United States
government, the government of any of the states constituting the United States,
any municipality and any other domestic or foreign national or provincial or
regional government, and all of their respective branches, departments,
agencies, instrumentalities, courts, subsidiary corporations or other
subdivisions, to the extent such Governmental Entity has jurisdiction.

           "Hazardous Substances" means any (i) material, substance, waste
(including any solid, liquid, semisolid or gas or gaseous mixture), product,
chemical, pesticide, fungicide, rodenticide, pollutant, contaminant, hazardous
material, hazardous substance, hazardous waste or solid waste, as the foregoing
terms are considered or defined as harmful or toxic under, regulated by or form
the basis of liability under any applicable Environmental Law; (ii) petroleum
(including crude oil or any fraction thereof) products of any kind; (iii)
asbestos, asbestos containing material; (iv) radioactive substance; and (v) any
polychlorinated biphenyl (PCB).

           "Highly Compensated Employee" has the meaning set forth in Section
3.11.1.

           "HSR Act" means the Hart-Scott-Rodino Antitrust Improvements Act of
1976 and all regulations promulgated thereunder, as the same has been amended
from time to time.

           "Immaterial Injunction" has the meaning set forth in Section 6.1.1.

           "Indemnitee" has the meaning set forth in Section 8.5.

           "Indemnitor" has the meaning set forth in Section 8.5.

           "Intellectual Property" has the meaning set forth in the definition
of CRL Business Assets.

           "Interest Rate" means the sum of the annual rate of interest from
time to time announced publicly by The Chase Manhattan Bank as its prime rate,
plus two percent or if The Chase Manhattan Bank no longer announces its prime
rate, LIBOR plus five percent.

           "Internal Reorganization" means, collectively, the Stage 1
Reorganization and the Stage 2 Reorganization.

           "International" has the meaning set forth at the beginning of this
Agreement.

           "Investors' Agreement" means the agreement entered into as of the
Closing Date among Recap Co, Buyer, CRL and each other stockholder of Recap Co
in substantially the form of Exhibit 2.3.8.

                                       10
<PAGE>

           "IRS" means the U.S. Internal Revenue Service.

           "Joint Venture" shall have the meaning set forth in subparagraph
(vii) of the definition of Excluded Liabilities.

           "Joint Venture Non-U.S. Benefit Plan" shall have the meaning set
forth in subparagraph (vii) of the definition of Excluded Liabilities.

           "Knowledge" has the meaning set forth in Section 9.4.

           "Law" means any constitution, law, statute, code, ordinance, rule,
regulation, order, judgment or decree that is of a binding nature and
enforceable by or through any Governmental Entity through the Closing Date.

           "Litigation Expense" means any costs and expenses incurred in
connection with investigating, defending or asserting any claim, action, suit or
proceeding incident to any matter indemnified against under this Agreement,
including, without limitation, court filing fees, court costs, arbitration fees
or costs, witness fees and reasonable fees and disbursements of legal counsel
(whether incurred in any action or proceeding between the parties to this
Agreement or between any party to this Agreement and any third party),
investigators, expert witnesses, accountants and other professionals and all
costs and expenses incurred as a result of Section 8.4.5.

           "Loss" means any loss, obligation, claim, liability, settlement
payment, award, judgment, tax, fine, penalty, interest charge, cost, expense,
damage or deficiency or other charge, other than Litigation Expense and all
costs and expenses incurred as a result of Section 8.4.5.

           "Material Contracts" has the meaning set forth in Section 3.18.

           "Merger" shall mean the merger of Acquisition Subco with and into
Recap Co.

           "Multiemployer Plans" has the meaning set forth in Section 3.15.1.

           "NewCanCo" has the meaning set forth in Section 2.1.1.

           "Net Underfunding Amount" has the meaning set forth in subparagraph
(vii) of the definition of Excluded Liabilities.

           "Non-U.S. Benefit Plans" has the meaning set forth in Section
3.15.13.

           "Other Consents" has the meaning set forth in Section 6.2.5.

           "Parent Canada" has the meaning set forth at the beginning of this
Agreement.

           "PBGC" means the Pension Benefit Guaranty Corporation.

           "Permits" has the meaning set forth in Section 3.14.

                                       11
<PAGE>


           "Permitted Encumbrances" means: (i) those encumbrances disclosed in
Schedule 1.1.4 of the Disclosure Schedule; (ii) those encumbrances disclosed in
the notes to the Audited Financial Statements, excluding encumbrances in respect
of Excluded Liabilities; (iii) liens for Taxes, assessments and other
governmental charges not yet due and payable or due but not delinquent or being
timely contested in good faith by appropriate proceedings and for which adequate
reserves have been established in accordance with GAAP; (iv) mechanics',
workmen's, repairmen's, warehousemen's, carriers' or other like liens arising or
incurred in the ordinary course of business and securing obligations which are
not past due or being timely contested in good faith by appropriate proceedings;
(v) Capital Leases and equipment leases with third parties entered into in the
ordinary course of business excluding Capital Leases constituting Excluded Debt;
(vi) with respect to Real Property: (A) easements, quasi-easements, leases,
licenses, restrictive covenants, rights-of-way and other similar encumbrances,
provided that none of the same (individually or in the aggregate) could
reasonably be expected to result in Costs in excess of $350,000, (B) any
conditions that would be shown on or disclosed by a current survey, provided
that none of the same (individually or in the aggregate) could reasonably be
expected to result in Costs in excess of $350,000, and (C) restrictions imposed
by any applicable Law, including zoning and building Laws; and (vii) all rights
in Intellectual Property requiring subsequent recording or registration to
perfect title.

           "Person" means any individual, a partnership, a joint venture, a
corporation, a limited liability company, a trust, an association, an
unincorporated organization, a Governmental Entity and any other entity.

           "Plans" has the meaning set forth in Section 3.15.1.

           "Premises" means the real property presently owned, leased or
licensed by or for the CRL Business.

           "Purchase Price" means $443,000,000.

           "Purchased Shares" means the shares of Recap Co Common Stock issued
to Acquisition Co in the Merger.

           "Real Property" has the meaning set forth in Section 3.12.

           "Recapitalization" has the meaning set forth in Section 2.2.

           "Recapitalization Documents" means all credit facilities, notes,
indentures, securities purchase agreements, security documents and other
agreements, instruments or documents entered into in connection with the
Recapitalization.

           "Recap Co" has the meaning set forth at the beginning of this
Agreement.

           "Recap Co Common Stock" means the common stock, par value $.01, per
share, of Recap Co.

           "Recap Co Sub Note" means the subordinated, pay-in-kind promissory
note to be issued by Recap Co to CRL on the Closing Date in substantially the
form of Exhibit 2.3.1.

                                       12
<PAGE>

           "Recap Subco" has the meaning set forth at the beginning of this
Agreement.

           "Recap Subco Common Stock" means the common stock, par value $.01,
per share, of Recap Subco.

           "Recap Co Preferred Stock" means the Series A Redeemable Preferred
Stock, par value $.01 per share, of Recap Co.

           "Recap Subco Preferred Stock" means the Series A Redeemable Preferred
Stock, par value $.01 per share, of Recap Subco.

           "Recap Subsidiaries" means the corporations and other entities whose
capital stock or equity interests are owned by Recap Subco as and in the
percentages listed on Schedule 3.3 of the Disclosure Schedule, and shall mean
and include Recap Co.

           "Receivables" has the meaning set forth in the definition of CRL
Business Assets.

           "Redemptions" means the series of transactions whereby Recap Co
redeems Common Stock held by CRL, SPAFAS, and International and Preferred Stock
held by WPLP, in each case as described in Section 2.3.

           "Releases" means each Agreement and Release, dated the date hereof,
among each Person who is a party to the Retention Agreements, Recap Subco and
Seller Parent.

           "Representative" has the meaning set forth in Section 5.1.

           "Required Consents" means, collectively, the Governmental Consents
and the Third Party Consents.

           "Retention Agreements" means the agreements set forth on Schedule
5.6.5.

           "Section 338(h)(10) Election" has the meaning set forth in Section
5.5.5.

           "Seller Indemnified Parties" has the meaning set forth in Section
8.3.

           "Seller Parent" has the meaning set forth at the beginning of this
Agreement.

           "Sellers" means CRL, SPAFAS, WPLP and International.

           "Seller's Equity Percentage" shall mean the number of shares of Recap
Co Common Stock that CRL or any Affiliate of CRL owns at such time divided by
the total number of issued and shares of Recap Co Common Stock.

           "SERP" means the Charles River Laboratories Executive Life
Insurance/Supplemental Retirement Income Plan, as amended and restated.

           "SPAFAS" has the meaning set forth at the beginning of this
Agreement.

                                       13

<PAGE>

           "Stage 1 Reorganization" means the transactions which occurred on
July 9, 1999 pursuant to the Contribution Agreement between Recap Subco and CRL,
the Contribution Agreement between Recap Subco and International, the
Contribution Agreement between Recap Subco and SPAFAS, and the Contribution
Agreement between Recap Subco and CRL (with respect to the transfer of all of
the issued and outstanding shares of CRL U.K. Limited) (collectively, the
"Contribution Agreements").

           "Stage 2 Reorganization" has the meaning set forth in Section 2.1.

           "Tax" means any federal, state, local, foreign or provincial income,
gross receipts, property, sales, service, use, license, lease, excise,
franchise, employment, payroll, withholding, employment, unemployment insurance,
workers' compensation, social security, alternative or added minimum, ad
valorem, value added, stamp, business license, occupation, premium,
environmental windfall profit, customs, duties, estimated, transfer or excise
tax, or any other tax, custom, duty, premium, governmental fee or other
assessment or charge of any kind whatsoever, together with any interest or
penalty imposed by any Governmental Entity.

           "Tax Returns" means all returns, reports, estimates, information
returns and statements any nature with respect to Taxes.

           "Tax Sharing Agreements" has the meaning set forth in Section 3.17.1.

           "Transfer Taxes" has the meaning set forth in Section 9.3.

           "Transfer Tax Returns" has the meaning set forth in Section 9.3.

           "Unaudited Financial Statements" has the meaning set forth in Section
5.21.

           "Update" has the meaning set forth in Section 5.8.

           "WPLP" has the meaning set forth at the beginning of this Agreement.

           "Year 2000 Compliant" has the meaning set forth in Section 3.20.

1.2        Construction.

           1.2.1 References in this Agreement to any gender shall include
references to all genders. Unless the context otherwise requires, references in
the singular include references in the plural and vice versa. References to a
party to this Agreement or to other agreements described herein means those
Persons executing such agreements. The words "include," "including" or
"includes" shall be deemed to be followed by the phrase "without limitation" or
the phrase "but not limited to" in all places where such words appear in this
Agreement. Except with respect to Sections 3.2 and 4.2, the representation or
statement that an agreement is "enforceable" shall be deemed to include an
exception to the extent that enforceability may be limited by bankruptcy,
insolvency, fraudulent conveyance, reorganization, moratorium and other similar
Laws relating to or affecting the enforcement of creditor's rights generally,
and general equitable principles, whether considered in a proceeding in equity
or at law. The words "the transactions contemplated by this Agreement" shall
include the Redemptions, the Merger, the

                                       14
<PAGE>

Recapitalization and the execution and delivery of the Recap Co Sub Note and the
Investors' Agreement. This Agreement is the joint drafting product of Seller
Parent and Buyer and each provision has been subject to negotiation and
agreement and, in the event of an ambiguity or question of intent or
interpretation, shall not be construed for or against either party as drafter
thereof.

           1.2.2 The phrases "have heretofore been provided" or "has provided"
or similar words mean that Seller Parent has delivered copies of such
information to Buyer. The phrase "has provided access" or similar words means
that Seller Parent has allowed Buyer to review such information if requested by
Buyer.

           1.3 Accounting Conventions. All references in the Agreement to
financial terms shall be deemed to refer to such terms as they are defined under
GAAP, unless specifically identified otherwise.

           1.4 Disclosure Schedule. The Disclosure Schedule shall be prepared by
Seller Parent and delivered to Buyer simultaneously with the execution of this
Agreement and shall be arranged in Schedules corresponding to the numbered
Sections contained in this Agreement. The disclosures in any Schedule shall
qualify any other Schedule or Section to the extent that such information is
pertinent unless the Section specifies a specific Schedule and all contracts,
agreements or other documents referred to on any Schedule are hereby
incorporated by reference. The inclusion of any contract, agreement or matter on
any Schedule shall not be deemed an admission by Seller Parent or Recap Co that
such contract, agreement or matter is material or required to be disclosed or
that all similar contracts, agreements or matters have been disclosed except as
otherwise expressly required by the terms of this Agreement.

                                   ARTICLE 2

                    REORGANIZATION, MERGER RECAPITALIZATION,
                             REDEMPTIONS AND CLOSING

           2.1 Reorganization; Merger. Upon the terms and subject to the
conditions of this Agreement, the parties agree that the following transactions
will take place immediately prior to the Closing in the order set forth below
(with the steps set forth in Section 2.1.1 through 2.1.5 being hereinafter
referred to as the "Stage 2 Reorganizations"):

           2.1.1 Recap Subco shall form a wholly owned Canadian Corporation
("NewCanCo").

           2.1.2 WPLP shall contribute all of its CRL Business Assets used in
the CRL Business to Recap Subco and, in exchange therefor, Recap Subco shall
issue to WPLP the Recap Subco Preferred Stock pursuant to a contribution
agreement in substantially the form of the Contribution Agreements.

           2.1.3 Each of CRL, SPAFAS, and International shall exchange all of
Recap Subco Common Stock owned by it for the same number of shares of Recap Co
Common Stock and WPLP shall exchange all of the Recap Subco Preferred Stock for
the same number of shares of Recap Co Preferred Stock.

                                       15
<PAGE>

           2.1.4 CRL shall purchase shares of Recap Co Common Stock in exchange
for cash, Recap Co shall purchase shares of Recap Subco Common Stock in exchange
for cash and Recap Subco shall purchase shares of NewCanCo common stock in
exchange for cash.

           2.1.5 Parent Canada shall sell all of its CRL Business Assets used in
the CRL Business to NewCanCo in exchange for cash pursuant to an Asset Purchase
Agreement in substantially the form of the Contribution Agreements.

           2.1.6 Buyer shall form a wholly owned Delaware corporation
("Acquisition Co") and contribute at least $90,000,000 thereto in exchange for
shares of common stock of Acquisition Co.

           2.1.7 Buyer and Seller Parent shall cause Acquisition Co to merge
with and into Recap Co with Recap Co being the surviving entity and with Buyer
receiving such number of shares of Recap Co Common Stock constituting 87.5% of
the total number of shares of Recap Co Common Stock which shall be issued and
outstanding following the Redemptions.

           2.2 Recapitalization of Recap Co. Upon the terms and subject to the
conditions of this Agreement, prior to the Closing Date, Buyer will use its
Commercial Efforts to assist Recap Co and Recap Subco to obtain debt financing
all upon the terms and conditions set forth in the Commitment Letters (the
"Recapitalization"). On the Closing Date, Seller Parent shall cause Recap Co and
Recap Subco to enter into the Recapitalization Documents. The proceeds of the
Recapitalization together with the Recap Co Sub Note will be used to consummate
the Redemptions.

           2.3 Redemptions. Upon the terms and subject to the conditions of this
Agreement,
at the Closing:

           2.3.1 Recap Co shall redeem all of the shares of Recap Co Preferred
Stock owned by WPLP for $242,000,000 in cash payable by wire transfer of
immediately available funds to such account as is designated by WPLP, and WPLP
shall deliver to Recap Co certificates, duly endorsed for transfer, representing
such shares of Recap Co Preferred Stock.

           2.3.2 Recap Co shall redeem all of the shares of Recap Co Common
Stock owned by SPAFAS for $10,000,000 in cash payable by wire transfer of
immediately available funds to such account as is designated by SPAFAS, and
SPAFAS shall deliver to Recap Co certificates, duly endorsed for transfer,
representing such shares of Recap Co Common Stock.

           2.3.3 Recap Co shall redeem all of the shares of Recap Co Common
Stock owned by International for $8,000,000 in cash payable by wire transfer of
immediately available funds to such account as is designated by International,
and International shall deliver to Recap Co certificates representing such
shares of Recap Co Common Stock.

           2.3.4 Recap Co shall redeem such number of shares of Recap Co Common
Stock owned by CRL constituting 87.5% of the total number of shares of Recap Co
Common Stock then issued and outstanding following the redemptions set forth in
Sections 2.3.1 through 2.3.3 so that immediately after all of the Redemptions
CRL shall own 12.5% of the issued and outstanding shares of Recap Co Common
Stock for $140,000,000 in cash, payable by wire

                                       16

<PAGE>

transfer of immediately available funds to such account as is designated by CRL,
and $43,000,000 in principal amount of the Recap Co Sub Note, and CRL shall
deliver to Recap Co certificates, duly endorsed for transfer, representing such
shares of Recap Co Common Stock.

           2.3.5 By execution and delivery of this Agreement, Buyer and the
other parties to this Agreement hereby and as of the Closing Date consents to
the Redemptions.

           2.4 Closing. Unless this Agreement shall have been terminated and the
transactions contemplated herein have been abandoned pursuant to Article 7, the
Closing of the Stage 2 Reorganization, Recapitalization, Redemptions and Merger
(the "Closing") shall take place at 10:00 a.m. at the offices of Nixon, Peabody
LLP, 437 Madison Avenue, New York, New York 10022 on the later of September 24,
1999 (with an effective date upon the close of business on September 25, 1999)
or the tenth calendar day following the satisfaction of all conditions in
Article 6 or such other time and place as may be agreed to by Seller Parent and
Buyer (the "Closing Date").

                                   ARTICLE 3

                 REPRESENTATIONS AND WARRANTIES OF SELLER PARENT

           Seller Parent represents and warrants to Buyer as of the date hereof
as follows:

           3.1 Organization, Good Standing and Power. Except as set forth in the
Disclosure Schedule, each of Seller Parent, Recap Co, Recap Subco, CRL, SPAFAS,
International and Parent Canada is a corporation duly organized, validly
existing and in good standing under the Laws of the jurisdiction of its
incorporation. Seller Parent, Recap Co, Recap Subco and each Seller (other than
WPLP) has all requisite corporate power and authority to enter into this
Agreement and to perform its obligations hereunder. WPLP is a limited
partnership duly organized under the laws of the State of Delaware. WPLP has all
requisite partnership power and authority to enter into this Agreement and to
perform its obligations hereunder. Each of the Celtics Companies has all
requisite corporate power and authority to own, lease and operate the CRL
Business Assets owned by it. As of the Closing Date, Recap Co, Recap Subco and
each of the Recap Subsidiaries will be duly authorized, qualified or licensed to
do business as a foreign corporation and, where such concept is applicable, in
good standing, in each of the jurisdictions in which its ownership of the CRL
Business Assets owned by it as of the Closing Date, or the conduct of the CRL
Business by it as of the Closing Date, requires such authorization,
qualification or licensing, except where the failure to so qualify or to be in
good standing would not, individually or in the aggregate, reasonably be
expected to have a CRL Business Material Adverse Effect.

           3.2 Authorization and Validity. The execution, delivery and
performance by Seller Parent, Recap Co, Recap Subco and each Seller (except
WPLP) of this Agreement and the consummation by such corporations of the
transactions contemplated by this Agreement and the Internal Reorganization has
been duly authorized by the Boards of Directors of Seller Parent, Recap Co,
Recap Subco and each Seller (except WPLP), respectively. As of the Closing Date,
no other corporate or stockholder action on the part of Seller Parent, Recap Co,
Recap Subco, CRL, SPAFAS, International or Parent Canada will be necessary for
the authorization,

                                       17

<PAGE>

execution, delivery and performance of this Agreement and the
consummation of the transactions contemplated hereby or the Internal
Reorganization. The execution, delivery and performance by WPLP of this
Agreement has been duly authorized by all partnership action required on its
part. This Agreement has been duly executed and delivered by each of Seller
Parent, Recap Co, Recap Subco and each Seller and constitutes a valid and
legally binding obligation of each of them, enforceable against each of them in
accordance with its terms.

           3.3 Capitalization of Recap Subco and Recap Subsidiaries. The
Disclosure Schedule sets forth all classes or series, and the number of shares
of capital stock or other equity interests of Recap Co and Recap Subco
authorized, issued and outstanding and the beneficial and record holders
thereof. Except as described in this Agreement (including the Stage 2
Reorganization) or the Recapitalization Documents and except for arrangements,
understandings, agreements or commitments to which Buyer is a party or plans of
Buyer, there are no outstanding options, calls, warrants, subscriptions or other
rights or agreements to acquire, or any plans, agreements, or commitments
providing for the issuance or redemption of or the right to acquire: (i) any
capital stock or other equity interest of Recap Subco or any Recap Subsidiary,
or (ii) any securities or other obligations or rights convertible into,
exercisable for or exchangeable for the capital stock or other equity interests
of Recap Subco or any Recap Subsidiary. Other than the Recap Subsidiaries,
neither Recap Co nor Recap Subco has any equity ownership interest in any other
Person. Except as set forth in the Disclosure Schedule, as of the Closing Date,
all of the issued and outstanding shares of capital stock or other equity
interests of each of the Recap Subsidiaries will be owned, directly or
indirectly, by Recap Co, free and clear of all liens, encumbrances and transfer
restrictions of any kind. All of the issued and outstanding shares of common
stock and other capital stock of each Recap Subsidiary have been duly and
validly authorized and issued and are fully paid and non-assessable.

           3.4 Consent and Approvals; No Conflict. Except as described in the
Disclosure Schedule and except for the pre-merger notification requirements of
the HSR Act, the expiration or early termination of the waiting periods
thereunder and such filings, notifications and approvals as are required under
foreign antitrust or competition Laws, the execution, delivery and performance
of this Agreement by Seller Parent, Recap Co, Recap Subco and by each Seller,
and the consummation by each of them of the transactions contemplated hereby and
the Internal Reorganization: (i) did not (with respect to the Stage 1
Reorganization) and will not (with respect to the Stage 2 Reorganization and the
transactions contemplated hereby), with or without the giving of notice or the
lapse of time or both, violate, or require any of them to obtain any consent,
approval, or authorization to make any filing or to give any notice to any
Governmental Entity under any provision of any Law except where the failure to
obtain, make or give any such consents, approvals, filings or notices would not,
individually or in the aggregate, reasonably be expected to result in Costs in
excess of $350,000; and (ii) did not (with respect to the Stage 1
Reorganization) and will not (with respect to the Stage 2 Reorganization and the
transactions contemplated hereby), with or without the giving of notice or the
lapse of time or both, conflict with, result in the breach or termination of any
provision of, constitute a Default under, result in the acceleration of the
performance of an obligation of the CRL Business, or result in the creation of a
lien, charge or encumbrance upon any of the CRL Business Assets pursuant to any
of the organizational documents of Recap Subco, or any Recap Subsidiary, or any
Contract to which Seller Parent (with respect to the CRL Business), any Seller
(with respect to the CRL Business), Recap Subco or any Recap Subsidiary is a
party or by which Seller Parent (with

                                       18

<PAGE>

respect to the CRL Business), any Seller (with respect to the CRL Business),
Recap Subco or any Recap Subsidiary or any of the CRL Business Assets is bound,
except for such conflicts, breaches, terminations, Defaults, accelerations,
liens, charges or encumbrances which would not, individually or in the
aggregate, reasonably be expected to result in Costs in excess of $350,000.
Seller Parent has delivered to Buyer a true, complete and correct copy of each
agreement or other document relating to the Stage 1 Reorganization prior to the
date hereof.

           3.5 Purchased Shares in Merger. The Purchased Shares are duly
authorized, validly issued, fully paid and non-assessable. The issuance of the
Purchased Shares in the Merger are not subject to any preemptive, right of first
refusal, first offer, or other rights on behalf of any Person. At the Closing,
upon the issuance of the Purchased Shares to the Buyer in the Merger, Buyer will
have good and valid title to the Purchased Shares free and clear of all liens,
restrictions or other encumbrances of any kind.

           3.6 Financial Statements.

           3.6.1 Seller Parent has delivered to Buyer the most recent draft of
the consolidated balance sheets of the CRL Business as of December 26, 1998 and
December 27, 1997, and the related consolidated statements of income, changes in
shareholder's equity, and cash flows, including the notes thereto, for each of
the three years in the period ended December 26, 1998 (the "Draft Audited
Financial Statements"). Seller Parent has also delivered to Buyer the most
recent draft of the unaudited consolidated balance sheet of the CRL Business as
of June 26, 1999, and the related unaudited consolidated statements of income
and cash flows, including the notes thereto, for the six-month periods ended
June 26, 1999 and June 27, 1998 (collectively, the "Draft Unaudited Financial
Statements" and together with the Draft Audited Financial Statements, the "Draft
Financial Statements"). Upon delivery of the Financial Statements to Buyer
pursuant to Sections 5.21.1 and 5.21.2, they will have been prepared from the
books and records of the CRL Business and in accordance with GAAP consistently
applied and maintained throughout the periods indicated (except that the
Unaudited Financial Statements will not include comprehensive footnotes) and
will fairly present in all material respects the financial condition of the CRL
Business as at their respective dates and the results of its operations and cash
flows for the periods covered thereby. Upon delivery of the Unaudited Financial
Statements to Buyer pursuant to Section 5.21.2, they will include all
adjustments, which consist only of normal recurring adjustments, necessary for
such fair presentation.

           3.6.2 Notwithstanding anything contained herein to the contrary,
neither Seller Parent nor Recap Co make any representation or warranty as to any
tax or accounting treatment which may or may not be available to Recap Co or
Buyer upon consummation of the transactions contemplated by this Agreement,
including the availability of any step-up in basis for tax purposes or the
availability of leveraged recapitalization accounting treatment and the
existence of goodwill (or the amount thereof) that is or may be required to be
in any financial statements of Recap Co for periods after the Closing Date.

           3.7 Absence of Undisclosed Liabilities. Except as set forth in or
reserved against in the Balance Sheet and except as set forth in the Disclosure
Schedule, the CRL Business does not have any liabilities of any nature (whether
accrued, absolute, contingent or otherwise, whether due or to become due, and
whether or not the amount thereof is readily ascertainable or required

                                       19
<PAGE>

by GAAP to be disclosed on a balance sheet (or a footnote thereto)), except for
current liabilities (determined in accordance with GAAP consistently applied)
incurred after the Balance Sheet Date in the ordinary course of business
consistent with past practice; provided, however in no event shall the
representation and warranty contained in this Section 3.7 cover or be deemed to
cover any matter, subject, category or event which is covered by or addressed in
any other representation or warranty of Seller Parent contained in this
Agreement.

           3.8 Absence of Certain Changes. Except as set forth in the Disclosure
Schedule, since the Balance Sheet Date, the CRL Business has been conducted in
the ordinary course of business consistent with past practice, and other than in
the ordinary course of business, there has not been with respect to the CRL
Business any: (i) sale, assignment, pledge, hypothecation or other transfer of
any of the CRL Business Assets which, individually or in the aggregate, could
reasonably be expected to have a value in excess of $350,000, except for the
sale of inventory, collection of accounts receivable and the disposal of
obsolete or worn out equipment, in any case in the ordinary course of business
consistent with past practice, (ii) termination or material amendment of any
Material Contract, (iii) suffered any damage, destruction or other casualty loss
(whether or not covered by insurance) which, individually or in the aggregate,
have resulted or are reasonably likely to result, in Costs in excess of
$350,000, (iv) except for salary, bonuses and incentive compensation paid or
adjusted in the ordinary course of business consistent with past practices,
increase or amend the compensation payable or to become payable to any Highly
Compensated Employee or increase or amend any employee benefit plan, payment or
arrangement for any such Highly Compensated Employee; (v) labor dispute or, to
the Knowledge of Seller Parent, threatened labor dispute involving any Highly
Compensated Employee or any group of employees, (vi) actual or threatened
dispute with, or loss of business from, any material customer or supplier, or to
the Knowledge of Seller Parent, any event or circumstances which could
reasonably be expected to result in any such dispute or loss of business, (vii)
change in the method or procedures for billing or collection of customer
accounts or recording of customer accounts receivable or reserves for doubtful
accounts, or any method of accounting or accounting principles, (viii)
cancellation of debts or waiver of any claim or right which could reasonably be
expected to have a value, individually or in the aggregate, in excess of
$350,000, (ix) agreements or commitments for capital expenditures in excess of
$350,000 (individually or in the aggregate) other than as set forth in the 1999
capital expenditure budget of the CRL Business heretofore delivered to Buyer or
other than as approved by Buyer in writing, (x) security interest, lien or other
encumbrances with respect to any of the CRL Business Assets other than Permitted
Encumbrances, (xi) adverse change which is reasonably likely to have a CRL
Business Material Adverse Effect, (xii) amendment of any charter, by-laws or
other governing documents of Recap Subco or any Recap Subsidiary, (xiii)
employment or consulting agreement entered into with any Employee or any
increase in the compensation of any Employee, except for increases in the
ordinary course of business consistent with past practice or as a result of any
collective bargaining, employment or other agreement, or pursuant to any policy
or any bonus, pension, profit-sharing or other plan or commitment set forth in
the Disclosure Schedule, (xiv) loans or any other transaction with any Affiliate
other than transactions entered into in the ordinary course of business
consistent with past practice, (xv) establishment, amendment or contribution to
any pension, retirement, profit sharing, or stock bonus plan or multiemployer
plan covering any of the employees of the CRL Business, except as required by
Law or in accordance with past practice, or (xvi) an agreement to do any of the
foregoing.

                                       20
<PAGE>

           3.9 Entire CRL Business. Except for the Excluded Assets or as set
forth on Schedule 3.9 of the Disclosure Schedule and except for such assets or
rights the failure of which to have would be reasonably likely to result in
Costs in excess of $350,000, the CRL Business Assets constitute all of the
assets, properties and rights used to conduct the CRL Business as conducted on
the date of this Agreement and will constitute all of the assets, properties and
rights used to conduct the CRL Business on the Closing Date.

           3.10 Legal Proceedings. Except as described in the Disclosure
Schedule, there is no litigation, proceeding, action, suit, order, judgment or
decree before, of or by, or to the Knowledge of Seller Parent, investigation by,
any Governmental Entity or any claim in writing outside of the ordinary course
of business which is pending against Seller Parent, any Seller or any CRL
Company with respect to the CRL Business or, to the Knowledge of Seller Parent,
threatened in writing against Seller Parent, any Seller or any CRL Company or
the CRL Business: (i) relating to the CRL Business Assets or the CRL Business as
to which there is a reasonable likelihood of an outcome or outcomes that would,
individually or in the aggregate, reasonably be expected to result in Costs in
excess of $350,000, or (ii) which seeks to question, delay or prevent the
consummation of the transactions contemplated by this Agreement or the Internal
Reorganization.

           3.11 Employees and Labor Relations Matters.

           3.11.1 The Disclosure Schedule contains a list of all employees of
the CRL Business whose projected 1999 annual base compensation equals or exceeds
$100,000 (each, a "Highly Compensated Employee").

           3.11.2 Except as described in the Disclosure Schedule, to the
Knowledge of Seller Parent, there are no strikes, walk-outs, lock-outs or other
concerted work actions or union organization activity involving a material
number of employees of the CRL Business pending or threatened with respect to
the CRL Business which, individually or in the aggregate, could reasonably be
expected to result in Costs in excess of $350,000. Neither Recap Subco nor any
Recap Subsidiary nor any Seller is a party to any collective bargaining
agreements with respect to the CRL Business with any labor union or other
representative of employees with respect to employees of the CRL Business
located in the United States.

           3.11.3 Except as set forth in the Disclosure Schedule, no CRL Company
nor any Seller is a party to any collective bargaining agreements with any labor
union or other representative of employees or any works' council or similar
entity under applicable Laws with respect to employees of the CRL Business
located outside of the United States, including local agreements, amendments,
supplements, letters and memoranda of understanding of any kind, nor, to the
Knowledge of Seller Parent, is there any pending or threatened union
organization activity by or among any such employees.

           3.11.4 Except as set forth in the Disclosure Schedule, there are no
material violations of any Federal, state, local or foreign statutes,
ordinances, rules, regulations, orders, directives or other Laws with respect to
the employment of individuals by, or the employment practices or work conditions
of, Recap Subco or any Recap Subsidiary or any Seller with respect the conduct
of the CRL Business, or the terms and conditions of employment, wages and hours
of employees

                                       21

<PAGE>

of the CRL Business. Neither Recap Subco nor any Recap Subsidiary
nor any Seller with respect to the CRL Business is engaged in any unfair labor
practice or other unlawful employment practice and, except as set forth in the
Disclosure Schedule, there are no charges of unfair labor practices or other
employee-related complaints pending or, to the Knowledge of Seller Parent,
threatened against any such Person before the National Labor Relations Board,
the Equal Employment Opportunity Commission, the Occupational Safety and Health
Review Commission, the Department of Labor or any other Governmental Entity.

3.12       CRL Business Tangible Assets; Real Property.

           (a) Except as set forth in the Disclosure Schedule, as of the Closing
Date, (i) Recap Subco or one of the Recap Subsidiaries will have good, valid and
marketable title to all of the CRL Business Assets which constitute owned real
property, (ii) Recap Subco or one of the Recap Subsidiaries will have good and
valid title to all of the CRL Business Assets which constitute personal, mixed
or other (except Intellectual Property, as to which Section 3.13 relates)
property, (iii) Recap Subco or one of the Recap Subsidiaries will have a valid
and binding leasehold interest in all of the CRL Business Assets which
constitute leased property, and (iv) Recap Subco or one of the Recap
Subsidiaries will have good and valid title to the percentage of outstanding
capital stock or other equity interests of all of the Recap Subsidiaries as set
forth in Schedule 3.3 of the Disclosure Schedule, in each case, except to the
extent that such CRL Business Assets have been sold or otherwise disposed of
prior to the Closing Date in the ordinary course of business or otherwise in
accordance with this Agreement, and in each case free and clear of all liens,
charges and other encumbrances of any kind, except Permitted Encumbrances.

           (b) The Disclosure Schedule sets forth a complete and accurate list
of all real property leased to or owned by any of the CRL Companies and all
other real property in which any of the CRL Companies has any interest
(collectively, the "Real Property").

           3.13 Intellectual Property. Except as described in the Disclosure
Schedule, as of the Closing Date, Recap Subco or one of the Recap Subsidiaries
will own good and valid title to, or be licensed to use, all material
Intellectual Property used to conduct the CRL Business as presently conducted.
Except as set forth in the Disclosure Schedule, to the Knowledge of Seller
Parent (i) there are no actions or proceedings pending or threatened in writing
which challenge the CRL Business' right to use any of the Intellectual Property
necessary to conduct the CRL Business, and (ii) neither Seller Parent nor any of
its Affiliates has received any written notice of, nor has knowledge of any
facts which indicate the likelihood of, any infringement by the CRL Business as
presently conducted of the trademark rights of others in any manner which would,
individually or in the aggregate, reasonably be expected to result in Costs in
excess of $350,000 and (iii) neither Seller Parent nor any of its Affiliates has
received any written notice of, nor has knowledge of any facts which indicate
the likelihood of, any infringement by, or any conflict with any third party
with respect to, the patents included in the Intellectual Property (including,
without limitation, any demand or request that Seller Parent or its Affiliates
license any rights from a third party). Notwithstanding anything to the contrary
contained in this Agreement, except for the representations and warranties
contained in this Section 3.13, neither Seller Parent nor any other Person makes
any express or implied representation or warranty on behalf of Seller Parent,
Recap Subco or any Recap Subsidiary with respect to Intellectual Property.

                                       22
<PAGE>

           3.14 Compliance with Applicable Laws. Except as set forth in the
Disclosure Schedule, and without admitting any liability with respect thereto
(except to a Buyer Indemnified Party in the event of a breach of the
representation and warranty contained in this Section 3.14 which entitles such
Buyer Indemnified Party to indemnification pursuant to Section 8.2(a)), the CRL
Business and each of Seller Parent (with respect to the CRL Business), Sellers
(with respect to the CRL Business), Recap Subco and the Recap Subsidiaries, has
been and is operated and conducted so as to comply with all applicable Laws,
except where the failure to comply with such Laws would not, individually or in
the aggregate, reasonably be expected to result in Costs in excess of $350,000.
Except as described in the Disclosure Schedule, as of the Closing Date, to the
Knowledge of Seller Parent, Recap Subco and Recap Subsidiaries shall have all
licenses, permits, consents, approvals, authorizations, qualifications and
orders of each Governmental Entity required for the ownership of the CRL
Business Assets and conduct of the CRL Business as presently conducted
(collectively, "Permits"), except where the failure to have such licenses,
permits, consents, approvals, authorizations, qualifications and orders would
not, individually or in the aggregate, reasonably be expected to result in costs
in excess of $350,000.

           3.15 Employee Benefit Plans.

           3.15.1 The Disclosure Schedule sets forth with respect to all United
States locations of the CRL Business each pension, profit-sharing, savings,
bonus, incentive or deferred compensation, severance pay, vacation pay, medical,
life insurance, welfare or other employee benefit plan in which employees of
Recap Subco or any of the Recap Subsidiaries participate or that Recap Subco or
any of the Recap Subsidiaries maintains or sponsors, or to which Recap Subco or
any of the Recap Subsidiaries is required to make contributions. All pension,
profit-sharing, savings, bonus, incentive or deferred compensation, severance
pay, medical, life insurance, welfare or other employee benefit plans within the
meaning of Section 3(3) of ERISA in which the U.S. employees of Recap Subco or
any of the Recap Subsidiaries participate (such plans and related trusts,
insurance and annuity contracts, funding media and related agreements and
arrangements, other than any "multiemployer plan" (within the meaning of Section
3(37) of ERISA), being hereinafter referred to as the "Benefit Plans" and any
such multiemployer plans being hereinafter referred to as the "Multiemployer
Plans") comply with all requirements of the Department of Labor (the "DOL") and
the IRS, and with all other applicable Laws, except where the failure to comply
with such Laws (individually or in the aggregate) would not reasonably be
expected to result in Costs in excess of $350,000. The CRL Companies have
furnished to Buyer copies of all Benefit Plans and all financial statements,
actuarial reports and annual reports and returns filed with the IRS with respect
to such Benefit Plans for a period of two years prior to the date hereof. To the
Knowledge of Seller Parent, such financial statements, actuarial reports and
annual reports and returns are true and accurate in all material respects.

           3.15.2 Except as set forth in the Disclosure Schedule, each Benefit
Plan intended to qualify under Section 401(a) of the Code has received a
favorable determination letter from the IRS as to its qualification under
Section 401(a) of the Code, and nothing has occurred in the operation of any
such Benefit Plan which, either individually or in the aggregate, would
reasonably be expected to cause the loss of such qualification or the imposition
of any liability, penalty or tax under ERISA or the Code which would reasonably
be expected to result in Costs in excess of $350,000.

                                       23
<PAGE>

           3.15.3 No Benefit Plan which is a "defined benefit plan" (within the
meaning of Section 3(35) of ERISA) (hereinafter referred to as the "Defined
Benefit Plans") has incurred an "accumulated funding deficiency" (within the
meaning of Section 412(a) of the Code), whether or not waived.

           3.15.4 Except as set forth in the Disclosure Schedule, in the last
six (6) years there has been no "reportable event" (within the meaning of
Section 4043 of ERISA) for which there has been a nonwaiveable notice
requirement imposed under Section 4043 of ERISA with respect to any Defined
Benefit Plan.

           3.15.5 To the Knowledge of Seller Parent, no "prohibited transaction"
(within the meaning of Section 406 of ERISA or Section 4975(c) of the Code) has
occurred with respect to any Benefit Plan.

           3.15.6 None of the CRL Companies has incurred any liability to the
PBGC, except for required premium payments. No notice of termination has been
filed by the plan administrator (pursuant to Section 4041 of ERISA) or issued by
the PBGC (pursuant to Section 4042 of ERISA) with respect to any Benefit Plan
subject to ERISA. There has been no termination of any Defined Benefit Plan or
any related trust by any of the CRL Companies.

           3.15.7 As of the date of the most recent actuarial report, the excess
of the aggregate present value of accrued benefits over the aggregate value of
the assets of any Defined Benefit Plan (computed both on a termination basis and
on an ongoing basis) is not more than $-0-, and there are no unfunded vested
benefits (within the meaning of PBGC Reg. ss. 4006.4) with respect to any
Defined Benefit Plan.

           3.15.8 There are no overdue contributions which are required to be
made by any of the CRL Companies to trusts in connection with any Benefit Plan
that is a "defined contribution plan" (within the meaning of Section 3(34) of
ERISA).

           3.15.9 Other than claims in the ordinary course for benefits with
respect to the Benefit Plans, there are no actions, suits or claims (including
claims for income taxes, interest, penalties, fines or excise taxes with respect
thereto) pending with respect to any Benefit Plan, or, to the Seller Parent's
Knowledge, any circumstances which would reasonably be expected to give rise to
any such action, suit or claim (including claims for income taxes, interest,
penalties, fines or excise taxes with respect thereto).

           3.15.10 All material reports, returns, notices and similar documents
with respect to the Benefit Plans required to be filed with the IRS, the DOL,
the PBGC or any other Governmental Entity have been so filed.

           3.15.11 Except as set forth in the Disclosure Schedule, none of the
CRL Companies has any obligation to provide health or other welfare benefits to
former, retired or terminated employees in the CRL Business, except as
specifically required under Section 4980B of the Code or Section 601 of ERISA.
Each of the CRL Companies has complied with the notice and continuation
requirements of Section 4980B of the Code and Section 601 of ERISA and the
regulations thereunder.

                                       24
<PAGE>

           3.15.12 None of the CRL Companies maintains, sponsors or contributes
to and has never maintained, sponsored or contributed to any Multiemployer Plan.

           3.15.13 The Disclosure Schedule sets forth all benefit plans,
contracts and arrangements covering non-U.S. CRL Business employees ("Non-U.S.
Benefit Plans"). Each of the CRL Companies and Sellers is and following the
Stage 2 Reorganization each of Recap Subco and each Recap Subsidiary will be in
compliance with applicable Laws and collective bargaining agreements with
respect to all Non-U.S. Benefit Plans except where the failure to comply with
such Laws and agreements (individually or in the aggregate) would not reasonably
be expected to result in Costs in excess of $350,000. Except as set forth in the
Disclosure Schedule, there are no unfunded liabilities (determined in accordance
with GAAP) with respect to any Non-U.S. Benefit Plans that are defined benefit
plans.

           3.16 Environmental Matters. Except as set forth in the Disclosure
Schedule:

           (a) each of the CRL Companies has duly complied with, and the CRL
Business is conducted and has been conducted in substantial compliance with, all
Environmental Laws, except where the failure to comply with such Laws
(individually or in the aggregate) would not reasonably be expected to result in
Costs in excess of $350,000, and each of the CRL Companies has provided Buyer
with copies of all Phase I and Phase II environmental site assessments and other
material reports, notices and similar materials in their possession and related
to Environmental Laws or Environmental Claims;

           (b) none of the CRL Companies has received written notice of, nor are
there any facts to Seller Parent's Knowledge which can reasonably be expected to
give rise to, any Environmental Claim against or affecting any of the CRL
Companies in the conduct or operation of the CRL Business as currently
conducted;

           (c) none of the CRL Companies, nor, to the Knowledge of Seller
Parent, any other Person, has generated, treated, transported, stored, recycled,
discharged, emitted, disposed of or released any Hazardous Substances or
arranged for the generation, treatment, transport, storage, recycling,
discharge, emission, disposal or release of any Hazardous Substances, which
could reasonably be expected to give rise to any Environmental Claim or any
liability or corrective or remedial obligation of any of the CRL Companies in
the conduct or operation of the CRL Business under any Environmental Laws,
except for such Environmental Claims, liabilities or obligations which
(individually or in the aggregate) would not reasonably be expected to result in
Costs in excess of $350,000;

           (d) none of the Real Property, or property to which any of the CRL
Companies has transported or arranged for the transportation of any Hazardous
Substances, is listed on the National Priorities List promulgated pursuant to
the Comprehensive Environmental Response, Compensation and Liability Act of
1980, as amended ("CERCLA"), on CERCLIS (as referred to in CERCLA) or on any
similar federal or state list of sites requiring investigation or clean-up; and

           (e) The New Jersey Industrial Site Recovery Act, N.J.S.A. 13:1 K-6 et
seq., and the regulations promulgated thereunder, will not be applicable to any
of the Real Property

                                       25

<PAGE>

upon consummation of the transactions contemplated by this Agreement or the
Internal Reorganization. The Connecticut Transfer Act, C.G.S.A., Chapter 445,
22a-134 et seq., and the regulations promulgated thereunder, will not be
applicable to any of the Real Property upon consummation of the transactions
contemplated by this Agreement or the Internal Reorganization.

           3.17 Tax Matters.

           3.17.1 Except as disclosed in the Disclosure Schedule: (i) Recap
Subco and each Recap Subsidiary has filed all material Tax Returns required to
be filed by it, or requests for extensions to file such Tax Returns have been
timely filed, granted and have not expired; (ii) Recap Subco and each Recap
Subsidiary has paid all Taxes which have become due as shown on such Tax
Returns; (iii) no material claim for unpaid Taxes is being asserted in writing
by a Tax authority with respect to Recap Subco or any Recap Subsidiary; and (iv)
all Tax sharing agreements to which Recap Subco and any Recap Subsidiary is a
party ("Tax Sharing Agreements") will be terminated as of the Closing Date and
after the Closing Date none of Recap Subco nor any Recap Subsidiary shall have
any liability with respect to any Tax under any such Tax Sharing Agreement.

           3.17.2 CRL is a member of Seller Parent's consolidated federal income
tax group, eligible to file the Section 338(h)(10) Election.

           3.17.3 No election under Section 341(f) of the Code has been or will
be made to treat Recap Subco or any Recap Subsidiary as a "consenting
corporation" as defined therein.

           3.17.4 The accrual for Taxes reflected in the Financial Statements
accurately reflects the total amount of unpaid Taxes arising from or with
respect to the CRL Business Assets or the operation or conduct of the CRL
Business on or prior to the Closing Date, whether or not disputed and whether or
not presently due and payable, of Recap Subco and each Recap Subsidiary as of
the close of the periods covered by the Financial Statements. Adequate accruals
and reserves have been made in the Financial Statements and the books and
records of each of Recap Subco and each Recap Subsidiary for the payment of all
unpaid federal, state, local, foreign and other Taxes arising from or with
respect to the CRL Business Assets or the operation or conduct of the CRL
Business on or prior to the Closing Date for all periods through the respective
dates thereof, whether or not yet due and payable and whether or not disputed.

           3.18 Contracts. Except as set forth in the Disclosure Schedule, all
written and, to the Knowledge of Seller Parent, all oral contracts, employment
agreements, consulting agreements, service agreements, guarantees (or other
agreements or commitments relating to contingent obligations), purchase
commitments for materials and other services, advertising and promotional
agreements, leases, license agreements and other agreements pertaining to the
CRL Business that are included in the CRL Business Assets ("Contracts") which
(a) (i) may be performed in whole or in part after the Closing Date; (ii)
individually involve payments or other financial commitments as of the date of
this Agreement which, by its terms, must be in excess of $100,000 during any
twelve month period; (iii) extend more than twelve (12) months after the date of
this Agreement; and (iv) are not terminable without penalty within ninety (90)
days or (b) are set forth in Schedule 3.18 of the Disclosure Schedule

                                       26

<PAGE>

(collectively the "Material Contracts") are in full force and effect and are
valid and enforceable in accordance with their respective terms except where the
failure to be in full force and effect and valid and enforceable would not,
individually or in the aggregate, reasonably be expected to result in Costs in
excess of $350,000. The Disclosure Schedule sets forth a complete and correct
list of each Material Contract and all powers of attorney, if any, relating to
the conduct or operation of the CRL Business. Except as set forth in the
Disclosure Schedule, the CRL Business is not in Default in the performance of
any obligation under any Contract except for such Defaults which, individually
or in the aggregate, would not reasonably be expected to result in Costs in
excess of $350,000, and the Celtics Business has not received written notice or,
to Seller Parent's Knowledge, oral notice that any party to any Material
Contract intends to terminate, amend or modify any such Material Contract. To
the Knowledge of Seller Parent, no other party or parties to any Material
Contract is in Default in the performance of any obligation thereunder except
for such Defaults which, individually or in the aggregate, would not reasonably
be expected to result in Costs in excess of $350,000.

           3.19 Certain Fees. With the exception of fees and expenses payable to
Morgan Stanley & Co. Inc., which shall be paid by Seller Parent, none of Seller
Parent, any Seller, any CRL Company nor any of their Affiliates has employed any
broker or finder or incurred any other liability for any brokerage fees,
commissions or finders' fees in connection with the transactions contemplated by
this Agreement.

           3.20 Year 2000. Except as set forth in the Disclosure Schedule, to
the Knowledge of Seller Parent all computer software, hardware and related
systems (including without limitation embedded microcontrollers in non computer
equipment) (collectively, "Computer Systems") included in the CRL Business
Assets are either (i) Year 2000 Compliant or (ii) designated (in the 1999
capital expenditure budget of the CRL Business heretofore delivered to Buyer) to
receive upgrades or modifications to become Year 2000 compliant, except where a
failure of such Computer Systems to be Year 2000 Compliant would not
(individually or in the aggregate) reasonably be expected to result in Costs in
excess of $350,000. For purposes of this Section 3.20, "Year 2000 Compliant"
shall mean that the Computer Systems are designed, have been modified or will be
modified to be able to process accurately all date/time data to be used prior
to, during, and after the calendar year 2000 A.D., without error, aborts, delays
or other interruptions relating to the processing, calculation, comparing,
sequencing or other use of date/time data from, into and between the twentieth
and twenty-first centuries.

           3.21 Insider Interests; Intercompany Transactions. Except as set
forth in the Disclosure Schedule, no stockholder, officer, director or Affiliate
of Seller Parent or any CRL Company (a) is presently a party to any transaction,
agreement or arrangement pertaining to the CRL Business or (b) owns any interest
in any of the CRL Business Assets.

           3.22 No Other Representations or Warranties. Except for the
representations and warranties contained in this Article 3 or in any certificate
executed by Seller Parent, any CRL Company or any Seller pursuant to Section
6.2.3, neither Seller Parent nor any other Person makes any express or implied
representation or warranty on behalf of Seller Parent, any CRL Company or any
Seller.

                                       27
<PAGE>

                                   ARTICLE 4

            REPRESENTATIONS AND WARRANTIES OF BUYER AND BUYER PARENT

           Buyer and Buyer Parent, jointly and severally, represent and warrant
to Seller Parent and each of the Sellers as follows:

           4.1 Organization, Good Standing and Power. Buyer is a limited
liability company and Buyer Parent is a limited partnership, in each case, duly
organized, validly existing and in good standing under the Laws of the
jurisdiction of its incorporation or formation, as the case may be, and has all
requisite limited partnership or limited liability company power and authority
to own, lease and operate the assets owned by it and to conduct the business as
now conducted by it. Each of Buyer and Buyer Parent has all requisite limited
partnership or limited liability power and authority to enter into this
Agreement and the Recapitalization Documents to which it is a party and to
perform its obligations hereunder and thereunder. Each of Buyer and Buyer Parent
is duly authorized, qualified or licensed to do business as a foreign
corporation or entity and, where such concept is applicable, is in good
standing, in each of the jurisdictions in which its ownership of assets owned by
it, or the conduct of the business as now conducted by it, requires such
authorization, qualification or licensing, except where the failure to so
qualify or to be in good standing would not, individually or in the aggregate,
reasonably be expected to have a Buyer Material Adverse Effect. 4.2
Authorization and Validity of Agreements. The execution, delivery, and
performance by Buyer and Buyer Parent of this Agreement and the consummation by
Buyer and Buyer Parent of the transactions contemplated hereby have been duly
authorized by all necessary limited liability company or partnership action. No
other limited liability company or partnership action on the part of Buyer or
Buyer Parent is necessary for the authorization, execution, delivery and
performance by Buyer or Buyer Parent of this Agreement and the consummation by
Buyer or Buyer Parent of the transactions contemplated hereby. This Agreement
has been duly executed and delivered by each of Buyer and Buyer Parent and
constitutes a valid and legally binding obligation of each of Buyer and Buyer
Parent, enforceable against each of Buyer and Buyer Parent in accordance with
its terms.

           4.3 Consents and Approvals; No Conflict. Except for the pre-merger
notification requirements of the HSR Act, the expiration or early termination of
the waiting periods thereunder and such filings, notifications and approvals as
are required under foreign antitrust or competition Laws, the execution,
delivery and performance of this Agreement by Buyer or Buyer Parent, and the
consummation by each of them of the transactions contemplated hereby and
thereby:

           (a) will not violate, or require any consent, approval, filing or
notice to be made by the Buyer or Buyer Parent under, any provision of any Law
applicable to the Buyer or Buyer Parent; and

           (b) will not conflict with, result in the breach or termination of
any provision of, constitute a Default under, result in the acceleration of the
performance of an obligation of Buyer or Buyer Parent under, or result in the
creation of a lien, charge or encumbrance upon the assets of the Buyer or Buyer

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Parent pursuant to: (i) the operating agreement, partnership agreement or
by-laws (or analogous organizational documents) of Buyer or Buyer Parent, or
(ii) any indenture, mortgage, deed of trust, lease, licensing agreement,
contract, instrument or other agreement to which Buyer or Buyer Parent is a
party or by which Buyer or Buyer Parent or any of their respective assets is
bound.

           4.4 Legal Proceedings. There is no litigation, proceeding or
governmental investigation pending or, to the Knowledge of Buyer, threatened
against Buyer or Buyer Parent, which seeks to question, delay or prevent the
consummation of, or would impair the ability of Buyer or Buyer Parent to
consummate, the transactions contemplated by this Agreement.

           4.5 Certain Fees. With the exception of fees and expenses payable to
DLJ Securities Corp. and payable as contemplated by the Commitment Letters,
which shall be paid by Recap Co or Recap Subco on the Closing Date, none of
Buyer, Buyer Parent nor any of their Affiliates has employed any broker or
finder or incurred any other liability for any brokerage fees, commissions or
finders' fees in connection with the transactions contemplated hereby or
thereby.

           4.6 Financing. Buyer has heretofore delivered to Seller Parent true
and complete copies of the Commitment Letters. As of the date of this Agreement,
the Commitment Letters are in full force and effect and have not been rescinded,
amended or modified in any respect.

           4.7 Access and Investigation. In connection with the negotiation and
execution of this Agreement, Buyer's Group has performed a comprehensive
investigation of the CRL Business and, with its advisors, has made its own
analysis and evaluation of the CRL Business, the Purchased Shares and Assumed
Liabilities and has received from Seller Parent or its Affiliates or had access
to all information that Buyer or Buyer Parent deems necessary or desirable in
deciding whether to acquire the Purchased Shares. Buyer's Group has had the
opportunity to ask questions of and receive answers from officers and other
representatives of Seller Parent, Recap Co and other management of the CRL
Business regarding the terms and conditions of its acquisition of the Purchased
Shares. In entering into this Agreement, Buyer's Group has relied solely upon
its own investigation and analysis and the representations, warranties and other
provisions of this Agreement and acknowledges that none of the Seller Parent,
Recap Co or any other of their Affiliates, employees, agents or representatives
makes or has made any representation, express or implied, with respect to the
CRL Business or the Purchased Shares except as expressly set forth in this
Agreement or any certificate delivered pursuant hereto. Buyer, by reason of its
business or financial experience, or the business and financial experience of
its professional advisors has the capacity to evaluate and protect its own
interests in the acquisition of the Purchased Shares. Buyer, and each of its
equity owners, has the financial capacity to bear the risk of, including the
entire loss of, its investment in the Purchased Shares. Nothing contained in
this Section 4.7 shall prohibit or in any way limit Buyer and Buyer Parent from
relying upon the representations and warranties of Seller Parent contained in
Article 3 nor from being indemnified pursuant to Article 8.

           4.8 No Other Representations or Warranties. Except for the
representations and warranties contained in this Article 4 or in any
certificates or other documents executed by Buyer or Buyer Parent in connection
with the transactions contemplated by this Agreement, neither Buyer, Buyer

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<PAGE>

Parent nor any other Person makes any express or implied representation or
warranty on behalf of Buyer or Buyer Parent.

                                   ARTICLE 5

                            COVENANTS OF THE PARTIES

           5.1 Access to Information; Confidentiality. Each of Seller Parent and
Recap Co agrees that, during the period commencing on the date hereof and ending
on the Closing Date, it will (a) give or cause to be given to Buyer and its
counsel, financial advisors, auditors, lenders, investors and their respective
authorized representatives in connection with the Recapitalization
(collectively, "Representatives") access to the properties, books and records of
the CRL Business and each of the CRL Companies to the extent that Buyer may from
time to time reasonably request such access, (b) furnish or cause to be
furnished to Buyer or its Representatives such financial and operating data and
other information relating to the CRL Business, the CRL Business Assets and each
of the CRL Companies as Buyer may from time to time reasonably request, (c)
provide Buyer and its Representatives such access as Buyer may reasonably
request to the representatives, officers and employees of its Affiliates
actively involved in the CRL Business, and (d) assist Buyer and its
Representatives as reasonably requested by Buyer in connection with the
Recapitalization and related transactions, provided that such assistance will
not unreasonably interfere with the conduct of the CRL Business; provided,
however, that (i) access to the properties, books, records, representatives,
officers and employees shall only be provided during normal business hours, upon
reasonable advance notice and in such manner as will not unreasonably interfere
with the operation of the CRL Business, (ii) all requests for access shall be
directed to Alan H. Farnsworth, Vice President Business Development of Seller
Parent, or such other person as Seller Parent shall designate from time to time,
and (iii) Seller Parent shall have the right to have a representative present at
all times access to properties, books, records representatives, officers and
employees is provided. Buyer agrees that, prior to the Closing, it will, and
will cause its Affiliates and Representatives to, continue to treat all
information so obtained from Seller Parent or any of its Affiliates as
"Confidential Information" under the Confidentiality Agreement entered into
between Seller Parent and Buyer dated January 4, 1999 (the "Confidentiality
Agreement"), and will continue to honor its obligations thereunder and that if
requested by Seller Parent, Buyer will cause any of its Representatives so
requested to enter into a written agreement acknowledging the terms of the
Confidentiality Agreement and agreeing to be bound thereby.

           5.2 Approvals under Competition Laws.

           5.2.1 Seller Parent and Buyer will, (i) as promptly as practicable
but in no event later than ten (10) Business Days after the date of this
Agreement, file with the United States Federal Trade Commission (the "FTC") and
the United States Department of Justice (the "DOJ") in materially accurate and
complete form, the notification and report form, if any, required for the
transactions contemplated hereby pursuant to the HSR Act and (ii) as promptly as
practicable, make such filings or notifications and seek such approvals as are
required for the transactions contemplated hereby under foreign antitrust or
competition Laws. Each of Seller Parent and Buyer shall furnish to the other
such necessary information and reasonable assistance as the other may request in

                                       30

<PAGE>

connection with its preparation of any filing or submission that is necessary
under the HSR Act or under foreign antitrust or competition Laws. Seller Parent
and Buyer shall promptly notify the other of the status of any communications
with, and inquiries or requests for additional information from, the FTC, the
DOJ and the Governmental Entities which administer the foreign antitrust or
competition Laws and shall comply promptly with any such inquiry or request.
Each of Seller Parent and Buyer will use its Commercial Efforts to obtain as
promptly as possible any clearance required under the HSR Act and the foreign
antitrust or competition Laws for the consummation of the transactions
contemplated hereby.

           5.2.2 Buyer and Buyer Parent shall take or cause to be taken, and
Seller Parent shall reasonably cooperate in connection therewith, any and all
reasonable actions, including any divestitures of assets of (i) Buyer and/or
Buyer Parent and/or their Affiliates and/or (ii) the CRL Business Assets, that
may be required by any Governmental Entity pursuant to the antitrust laws of the
United States or foreign antitrust or competition Laws in order to obtain
required consents or non-opposition to the transactions contemplated hereby from
the United States and other relevant jurisdictions or to permit the consummation
of the transactions contemplated hereby on terms and conditions consistent with
the terms of any judgment, decree or order issued by any court of competent
jurisdiction that may be in effect on the Closing Date; provided, however, that
Buyer shall not be required to violate any such judgment, decree or order, or to
effect or agree to effect any divestitures of assets of Buyer and/or Buyer
Parent and/or their Affiliates and/or the CRL Business Assets if the aggregate
annual revenues associated with all such divested assets of Buyer and/or Buyer
Parent and/or their Affiliates and/or the CRL Business Assets exceed $15,000,000
(individually or in the aggregate), using for the purposes of such calculation
the most recently completed fiscal year of Buyer and with respect to the CRL
Business, the fiscal year ended December 26, 1998; provided, however, that any
and all proceeds of any such divestiture of assets shall be the exclusive
property of Buyer (or Recap Subco or one of the Recap Subsidiaries as may be
designated by Buyer).

           5.3 Conduct of the CRL Business Pending the Closing Date. Seller
Parent agrees that, except as permitted, required or contemplated by this
Agreement or any Recapitalization Document, or the Exhibits or Disclosure
Schedules attached hereto (including, without limitation, Schedule 5.3 of the
Disclosure Schedule) or thereto and except that none of the restrictions set
forth in this Section 5.3 shall apply to any of the Excluded Assets, during the
period between the date of this Agreement and the Closing Date, without the
prior written consent of Buyer which shall not be unreasonably withheld, delayed
or conditioned:

           5.3.1 Seller Parent will, and will cause its Affiliates to, operate
the CRL Business only in the ordinary course of business consistent with past
practice;

           5.3.2 Seller Parent will not, and will cause its Affiliates not to,
amend or modify in any material respect any Material Contract;

           5.3.3 Seller Parent will not permit Recap Subco or any Recap
Subsidiary to amend its charter or by-laws (or analogous organizational
documents), except as may be required in connection with the consummation of the
transactions contemplated by this Agreement;

                                       31
<PAGE>

           5.3.4 Seller Parent will not permit Recap Subco or any Recap
Subsidiary to issue or agree to issue any additional shares of capital stock of
any class or series, or any securities convertible into or exchangeable for
shares of capital stock, or issue any options, warrants or other rights to
acquire any shares of capital stock;

           5.3.5 Seller Parent will not, and will not permit any of its
Affiliates to: (i) sell, transfer, dispose of or encumber any of the CRL
Business Assets having a value, individually or in the aggregate, in excess of
$100,000, other than in the ordinary course of business consistent with past
practice; (ii) enter into any employment or consulting agreement with any
employee of the CRL Business or grant any increase in the compensation of any
such employee, except for increases in the ordinary course of business
consistent with past practice or as a result of any collective bargaining, any
industrial award or as required by any employment or other agreement, or
pursuant to any policy or any bonus, pension, profit-sharing or other plan or
commitment; (iii) make any loans or enter into any transaction with any
Affiliate other than transactions entered into in the ordinary course of
business consistent with past practice; (iv) establish, amend or contribute to
any pension, retirement, profit sharing, or stock bonus plan or multiemployer
plan covering any of the employees of the CRL Business except as required by Law
or in the ordinary course of business consistent with past practice; (v) waive,
cancel, sell or otherwise dispose of for less than the face value thereof any
material claim or right that the CRL Business has against others, except in the
ordinary course of business consistent with past practices; (vi) incur
indebtedness at any Joint Venture which would constitute Excluded Debt; or (vii)
commit, or enter into any agreement to do, any of the foregoing.

           5.4 Consents. Seller Parent shall, at its sole cost and expense, use
its Commercial Efforts to promptly obtain the consents, approvals and
authorizations and to take the other actions set forth on Schedule 3.4. Buyer
shall, on Seller Parent's request, use its Commercial Efforts to assist Seller
Parent in obtaining such consents, approvals and authorizations and shall have
the right, if additional assurances with respect to the assumption of
obligations by Recap Subco or any of the Recap Subsidiaries after the Closing
Date are requested by the Person from whom consent, approval or authorization is
sought, participate, directly or through its Representatives, in the process of
obtaining such consents, approvals and authorizations. The forms, terms and
conditions of such consents, approvals and authorizations shall be subject to
the prior approval of Buyer, which shall not be unreasonably withheld or
delayed.

           5.5 Tax Matters.

           5.5.1 Seller Parent shall cause the CRL Business, Recap Subco and the
Recap Subsidiaries to be included in the consolidated federal income Tax Returns
of Seller Parent for any periods for which it is required to be so included, and
in any other required state, local and foreign consolidated, affiliated,
combined, unitary or other similar group income Tax Returns that include the CRL
Business, for all periods ending on or prior to the Closing Date. Seller Parent
shall prepare information (including schedules, worksheets and other data)
necessary, in Seller Parent's judgment, to include the CRL Business, Recap Subco
and the Recap Subsidiaries in such income Tax Returns for such periods. Seller
Parent shall timely prepare and file, or cause to be prepared and filed, all
income Tax Returns of or including the CRL Business, Recap Subco and the Recap
Subsidiaries for all taxable periods ending on or before the Closing Date and
shall pay, or cause to be paid, when due all income Taxes relating to such Tax
Returns.

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<PAGE>

           5.5.2 (a)  Seller Parent shall have the right and obligation to
represent the interests of the CRL Business, Recap Subco or the Recap
Subsidiaries in any Tax audit or administrative or court proceeding relating to
Tax Returns for any periods or portions thereof ending on or prior to the
Closing Date.

           (b) Following the Closing, in the event of an audit of Recap Subco or
any Recap Subsidiary as referred to in Section 5.5.3, Buyer shall execute, or
cause the appropriate Affiliate of Buyer to execute, a federal tax Form 2848 or
comparable Power of Attorney authorizing Seller Parent or Seller Parent's
designated representative to represent Recap Co or such Recap Subsidiary with
respect to income Taxes for which Seller Parent may be liable pursuant to this
Section 5.5 or Article 8.

           5.5.3 Buyer shall promptly notify Seller Parent in writing upon
receipt by Buyer or any Affiliate of Buyer of notice of any pending or
threatened Tax audits or assessments of the CRL Business, Recap Subco or the
Recap Subsidiaries so long as any period or portion thereof prior to the Closing
Date remains open to the Knowledge of Buyer.

           5.5.4 After the Closing Date, Buyer and Seller Parent shall provide
each other with such cooperation and information relating to the CRL Business,
Recap Subco or the Recap Subsidiaries as either party reasonably may request in
filing any Tax Return (or amended Tax Return) or refund claim, determining any
Tax liability or a right to a refund, conducting or defending any audit or other
proceeding in respect of Taxes or effectuating the terms of this Agreement. The
parties shall retain all Tax Returns, schedules, work papers and other material
documents relating thereto, until the seventh anniversary of the Closing Date
or, if later, the expiration of any relevant statute of limitations (and, to the
extent notified by any party, any extensions thereof) and, unless such Tax
Returns and other documents are offered and delivered to Seller Parent or Buyer,
as applicable, until the final determination of any Tax in respect of such
years. Any information obtained under this Section 5.5.4 shall be kept
confidential, except as may be otherwise necessary in connection with filing any
Tax Return (or amended Tax Return) or refund claim, determining any Tax
liability or a right to a refund, conducting or defending any audit or other
proceeding in respect of Taxes or otherwise effectuating the terms of this
Agreement. Notwithstanding the foregoing, neither Seller Parent nor Buyer, nor
any of their Affiliates, shall be required unreasonably to prepare any document,
or determine any information not then in its possession, in response to a
request under this Subsection 5.5.4; provided, however, no request shall be
deemed unreasonable if made in response to the request of a taxing authority for
information or documents not in the possession of the party receiving the
request nor otherwise reasonably available to it.

           5.5.5 CRL will join with Buyer in making a timely election under
Section 338(h)(10) of the Code (the "Section 338(h)(10) Election") to treat the
Merger as the deemed sale of the assets of all or some (as elected by Buyer) of
Recap Co and the Recap Subsidiaries while such Persons are members of Seller
Parent's consolidated group for federal income tax purposes. If requested by
Buyer, CRL (unless there is a material detriment to CRL) will also join with
Buyer in making any similar election under state or local law, which if made
shall be treated as part of the Section 338(h)(10) Election. In order to effect
a timely Section 338(h)(10) Election, at the Closing, each of CRL and Buyer
shall jointly prepare and execute copies of IRS Form 8023 and all attachments
required to be filed therewith in accordance with the Code and the applicable

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<PAGE>

regulations thereunder, which Form 8023 shall be completed by them to the extent
practicable at the time of the Closing in a manner consistent with the parties'
agreement as to the allocation of the "MADSP" among the assets of Recap Co and
the Recap Subsidiaries as set forth in Schedule 5.5.5 of the Disclosure Schedule
and shall be delivered to Buyer at the Closing. Following the Closing, Buyer
will complete the Form 8023 and will adjust any allocation to comply with the
requirements of Section 33 8(h)(10) of the Code and in a manner consistent with
provisions of Schedule 5.5.5 of the Disclosure Schedule, and will file the Form
8023 with the IRS (and any applicable state or local tax authority) with a copy
to CRL in order to effect a timely Section 338(h)(10) Election. CRL and Buyer
agree otherwise to take all necessary action to make a timely Section 338(h)(10)
Election with respect to the Merger, and shall otherwise cooperate fully with
each other in the making of such election and to comply with all substantive and
procedural requirements of Section 338(h)(10) of the Code, any applicable
regulations thereunder and any applicable provision of state or local law.
Except as required by applicable Law, neither CRL nor Buyer will take, nor
permit any Affiliate to take, for federal, state or local income Tax purposes,
any position inconsistent with the Section 338(h)(10) Election or the allocation
set forth in the Form 8023 filed by Buyer. Buyer will make a timely election
under Section 338(g) of the Code with respect to any Recap Subsidiary which is
incorporated in a jurisdiction other than the United States and shall comply
with all substantive and procedural requirements of Section 338(g) of the Code
and any applicable regulations thereunder, unless Buyer would suffer a material
detriment as a result of making such election.

           5.6 Employee Matters.

           5.6.1 During the period commencing on the Closing Date and ending on
the eighteen (18) month anniversary of the Closing Date, Buyer shall, or shall
cause Recap Subco and the Recap Subsidiaries to provide employee benefit plans,
programs and arrangements having benefits not less favorable in the aggregate to
the Employees of Recap Subco and the Recap Subsidiaries than the Benefit Plans
and Non-U.S. Benefit Plans, as applicable, provided that nothing in this
Agreement shall require Buyer, Recap Subco or any Recap Subsidiary to establish,
provide, sponsor or maintain any specific plan, program or arrangement or shall
require any such Person to continue the employment, or to refrain from modifying
or terminating the terms of employment of any Employee. In the case of any new
plan, program or arrangement, Buyer shall, or shall cause Recap Subco and the
Recap Subsidiaries to the extent permitted under applicable Law, provide that
periods of service with any of Recap Subco any Recap Subsidiary, any Seller or
any Affiliate of any of the foregoing Persons prior to the Closing Date shall be
credited for eligibility, vesting and benefits purposes (if applicable and
without duplication) with respect to such plan, program or arrangement, provided
that no service will be credited for purposes of calculating an employee's
benefit accrual under any Defined Benefit Plan or any Non-U.S. Benefit Plan that
is a defined benefit plan for any period of time that the employee did not
participate in such plan on or before the Closing Date.

           5.6.2 For any mass layoff or plant closing which occurs on or after
the Closing Date, Buyer shall cause Recap Subco or the relevant Recap Subsidiary
to give any notice to the Employees which is required under the Worker
Adjustment and Retraining Notification Act or any similar federal, state, local
or foreign Law.

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<PAGE>

           5.6.3 On the Closing Date, Buyer shall have in effect and thereafter
maintain or cause Recap Subco and the Recap Subsidiaries to have in effect and
maintain all policies of worker's compensation, employer's liability or similar
insurance which are required by any Governmental Entity to be in effect as of
the Closing Date.

           5.6.4 Buyer shall provide or shall cause Recap Subco or the Recap
Subsidiaries to provide continuation health care coverage pursuant to Part 6 of
Title I of ERISA to all current or former employees of Recap Subco, Recap
Subsidiaries and/or their predecessors and such individuals' qualifying
beneficiaries who are eligible for such coverage.

           5.6.5 On the Closing Date, Seller Parent shall pay and discharge in
full all Excluded Debt other than Excluded Debt with respect to Joint Ventures
and terminate all related liens, security interests or other encumbrances in
respect of CRL Business Assets and comply and cause Recap Subco to comply with
their respective obligations under the Releases.

           5.7 Additional Assurances.

           5.7.1 After the Closing Date, Seller Parent shall promptly and shall
cause its Affiliates promptly to, and Buyer shall promptly and shall cause Recap
Co and the Recap Subsidiaries promptly to, take such additional actions and
execute any such additional documents and instruments as may be reasonably
necessary (i) to effectuate the transactions contemplated by this Agreement,
including to fully vest good and valid title to all of the CRL Business Assets
in Recap Subco and the Recap Subsidiaries, as applicable, and to fully vest good
and valid title in the Excluded Assets in Seller Parent or its Affiliates free
and clear of all liens, claims or other encumbrances except Permitted
Encumbrances, and (ii) to cause Seller Parent or its Affiliates to retain or
assume any Excluded Liabilities not retained or assumed by Seller Parent or an
Affiliate prior to or on the Closing Date, or to cause Recap Subco or any Recap
Subsidiary to assume any Assumed Liability not assumed by it prior to or on the
Closing Date. Prior to and after the Closing Date, Seller Parent agrees to
assist Buyer in any reasonable manner requested, and without unreasonable delay,
in the preparation of financial statements of the CRL Business, including the
interim unaudited financial statements at and for the three months ended March
27, 1999 and at and for nine months ended September 25, 1999, including so that
such financial statements can be presented in conformity with the accounting
rules of Regulation S-X under the Securities Act of 1933, as amended; provided
however, that Buyer shall bear any out-of-pocket costs and expenses incurred by
Seller Parent or any of its Affiliates in connection with providing such
assistance.

           5.7.2 Notwithstanding anything to the contrary contained in this
Agreement, to the extent that the sale, assignment, transfer, conveyance or
delivery or attempted sale, assignment, transfer, conveyance or delivery of any
CRL Business Asset in the Internal Reorganization or any transaction
contemplated by this Agreement is prohibited by any applicable Law or would
require any Governmental Entity or other third party authorizations, approvals,
consents or waivers and such authorizations, approvals, consents or waivers
shall not have been obtained prior to the Closing and either such item(s) are
not a condition to Closing or Buyer shall have waived in writing the applicable
condition to Closing with respect to such item(s), this Agreement shall not
constitute a sale, assignment, transfer, conveyance or delivery, or any
attempted sale, assignment, transfer, conveyance or delivery thereof. Following

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<PAGE>

the Closing, the parties shall use Commercial Efforts and shall cooperate with
each other to obtain promptly such authorizations, approvals, consents or
waivers. Pending such authorization, approval, consent or waiver, the parties
shall cooperate with each other in any reasonable and lawful arrangements
designed to provide to Buyer, Recap Co and the Recap Subsidiaries the benefits
and liabilities of use of such CRL Business Asset. Once such authorization,
approval, consent or waiver for the sale, assignment, transfer, conveyance or
delivery of a CRL Business Asset not sold, assigned, transferred, conveyed or
delivered at the Closing is obtained, Seller Parent shall and shall cause its
Affiliates to promptly assign, transfer, convey and deliver, or cause to be
assigned, transferred, conveyed and delivered, such CRL Business Asset to Recap
Subco or a Recap Subsidiary for no additional consideration free and clear of
all liens, claims or other encumbrances except Permitted Encumbrances. To the
extent that any such CRL Business Asset cannot be transferred or the full
benefits and liabilities of use of any such CRL Business Asset cannot be
provided to Buyer, Recap Subco and the Recap Subsidiaries following the Closing
pursuant to this Section 5.7, then Buyer and Seller Parent or one or more of its
Affiliates shall enter into such arrangements (including subleasing or
subcontracting if permitted) designed to provide to Recap Subco and the Recap
Subsidiaries the economic and operational equivalent of obtaining such
authorization, approval, consent or waiver and the performance by Recap Subco
and the Recap Subsidiaries of the obligations thereunder to the extent permitted
by Law.

           5.7.3 Subject to Section 5.4, Buyer and Seller Parent shall cooperate
with each other and use their Commercial Efforts, as soon as practicable after
the Closing, to take all actions, if any are required, to transfer all permits,
authorizations and registrations issued to the CRL Business.

           5.8 Updated Disclosure Schedule. Seller Parent shall prepare and
deliver to Buyer at least five (5) Business Days prior to the Closing an update
of the Disclosure Schedule for the sole purpose of disclosing events or other
matters which have occurred after the date of this Agreement other than as a
result of the breach of this Agreement by Seller Parent, any of the Sellers,
Recap Subco or Recap Co or occurred prior to the date of this Agreement but did
not require disclosure as of the date of this Agreement (an "Update"). In the
event of the delivery to Buyer of an Update which sets forth the occurrence or
existence of an event or other matter which would cause the condition set forth
in Section 6.2.1 hereof not to be satisfied (determined without regard to the
Update), Buyer shall have no obligation to complete the Closing of the
transactions contemplated by this Agreement and may terminate this Agreement
pursuant to and in accordance with the procedure set forth in Section 7.1.1(d)
(without regard to the twenty (20) day cure period); provided that in the event
that Buyer does not so terminate this Agreement and the Closing occurs, the
Disclosure Schedule shall be deemed to be amended as of the date of this
Agreement to include the events or other matters set forth in the Update for all
purposes of this Agreement, including Article 8.

           5.9 Buyer's Insurance. From and after the Closing and at all times
until the Recap Co Sub Notes have been paid in full and Seller Parent and/or its
Affiliates cease to beneficially own any shares of Recap Co Common Stock, Buyer
shall cause Recap Co and the Recap Subsidiaries to procure and maintain in full
force and effect insurance coverage in such amounts, covering such risks and
liabilities and with such deductibles or self-insured retentions as is the
normal industry practice for businesses of similar size operating in similar
industries and markets and with similar financial conditions, including without
limitation, Directors and Officers Liability Insurance with annual limits in an
amount not less than $10,000,000 per occurrence and in aggregate.

                                       36
<PAGE>

           5.10 Cash Management. On the Closing Date, Seller Parent shall cause
the checking and all other applicable bank accounts of Recap Co and the Recap
Subsidiaries to have on deposit all amounts in good funds to pay in full on or
following the Closing Date all checks and drafts of the CRL Business issued but
not drawn on or prior to the Closing Date.

           5.11 Company Acquisition Proposal. Seller Parent covenants and agrees
that, from and after the date of this Agreement and until the first to occur of
its termination pursuant to Article 7 or the Closing, neither it nor any of its
Affiliates nor any of its representatives shall directly or indirectly (a) take
any action to solicit or initiate any Company Acquisition Proposal (as
hereinafter defined), or (b) engage in discussions or negotiations with any
Person with respect to any Company Acquisition Proposal, or (c) disclose any
non-public information relating to the CRL Business or afford access to the
employees, properties, books or records of the CRL Business to any Person that
has made or, to Seller Parent's Knowledge is considering making, a Company
Acquisition Proposal. Within five (5) Business Days after receipt of a Company
Acquisition Proposal or any request for nonpublic information relating to the
CRL Business or for access to the employees, properties, books or records of the
CRL Business by any Person who indicates that they may be considering making, or
has made, a Company Acquisition Proposal, Seller Parent shall notify Buyer of
the fact that such event has occurred and shall notify Buyer of the Person if
the Company Acquisition Proposal is received, directly or indirectly, by any
Person identified on Schedule 5.11 hereto. For the purposes hereof, "Company
Acquisition Proposal" shall mean any offer or proposal for (whether oral or in
writing), or any indication of interest in, a merger or other business
combination involving any of the CRL Business, Recap Subco or any Recap
Subsidiary or any Seller or the acquisition of any equity interest in, or all or
a substantial portion of the assets of, any of Recap Subco, any Recap Subsidiary
or any Seller or the CRL Business, other than the transactions contemplated by
this Agreement and other than transactions with respect to the Excluded Assets.

           5.12 Books and Records. Seller Parent shall retain in accordance with
its current records retention polices all books and records relating to the CRL
Business and, unless otherwise consented to in writing by Seller Parent or Buyer
(as the case may be), Buyer and Seller Parent will not, for a period of six
years following the Closing Date, destroy, alter, or otherwise dispose of any of
such books and records without first offering to surrender to Seller Parent or
Buyer, as the case may be, such books and records or any portion thereof which
Buyer or Seller Parent, as the case may be, may intend to destroy, alter, or
dispose. Buyer and Seller Parent will allow the other party's representatives
access to such books and records, upon reasonable request during such party's
normal business hours, for the purpose of examining and copying the same (but
only to the extent they relate to the CRL Business) in connection with any
matter related to or arising out of this Agreement or the transactions
contemplated hereby or the conduct by Buyer of the CRL Business.

           5.13 Use of Names. Buyer, Recap Co and the Recap Subsidiaries are
purchasing, acquiring or otherwise obtaining right, title or interest in the
names "Charles River Laboratories" and "SPAFAS" and any tradenames, trademarks,
identifying logos or service marks related thereto or employing the words
"Charles River" or "SPAFAS" (collectively, the "Names"). Seller Parent agrees

                                       37

<PAGE>

that, neither it nor any of its Affiliates shall make any commercial use of the
Names from and after the Closing Date; provided, however, Seller Parent shall
retain the right to make use of the Names for purposes of reflecting its
ownership of the CRL Business prior to the Closing Date. On the Closing Date,
Seller Parent shall cause the name of each of its Affiliates that contains the
words "Charles River" or "SPAFAS" to be changed to a name that does not contain
such words.

           5.14 Commitment Letters. Buyer shall use its Commercial Efforts to
obtain the financing contemplated by the Commitment Letters and shall use
Commercial Efforts to notify Seller Parent in writing within one (1) Business
Day if any of the Commitment Letters are terminated or within five (5) Business
Days of any of the terms or conditions of the Commitment Letters are amended or
modified in any material respect.

           5.15 Broekman Sale. In the event that the sale of the Broekman
Institute B.V., a Netherlands corporation located at Schoolstraat 21,5711 CP
Someran, The Netherlands, to Panning B.V. or an Affiliate thereof (the "Broekman
Sale") is consummated after the Closing Date, Buyer shall cause Charles River
Laboratories Europe GmbH to pay to Seller Parent all net proceeds of the
Broekman Sale within two (2) Business Days after receipt of such proceeds by
Charles River Laboratories Europe GmbH; provided, however, Charles River
Laboratories Europe GmbH shall be entitled to retain any and all sale proceeds
which are placed in escrow on the closing date of the Broekman Sale (the "Escrow
Amount") and thereafter released, regardless of whether the Broekman Sale occurs
prior to, on or after the Closing Date. In the event that Pharming B.V. or an
Affiliate thereof (the "Broekman Purchaser ") makes a claim for indemnification
under the Broekman Sale agreement, after the Closing Date Buyer shall cause
Recap Subco or a Recap Subsidiary, at Seller Parent's sole cost and expense, to
defend the claim, to the same extent as it would defend any claim for which it
was responsible for payment. In the event the Broekman Purchaser is entitled to
indemnification, such amount first shall be paid out of the sale proceeds placed
in escrow to the extent of the Escrow Amount and the balance, if any, shall
promptly be paid by Seller Parent. Buyer shall cause Recap Co or a Recap
Subsidiary to keep Seller Parent informed on a timely basis of any and all
indemnification claims and the status thereof. In the event that the Broekman
Sale is consummated after the Closing Date, Seller Parent shall indemnify Recap
Co and the Recap Subsidiaries for any income tax or similar tax liability
arising from any income or gain realized by Recap Co or any Recap Subsidiaries
on the Broekman Sale.

           5.16 Stage I Reorganization Matters. Seller Parent shall use its
Commercial Efforts cause to CRL, SPAFAS or International, as the case may be, to
obtain the consents, approvals and authorizations and make the filings set forth
in Schedule 5.16 of the Disclosure Schedule on or prior to the Closing Date.

           5.17 Confidential Information. Seller Parent and the Sellers covenant
and agree that none of them will, following the Closing, without the prior
written consent of Buyer, disclose (or permit to be disclosed) or use in any way
any confidential information of the CRL Business unless (i) compelled to
disclose such confidential information by judicial or administrative process or,
in the opinion of its counsel, by other requirements of Law, (ii) such
confidential information is available to the public through no fault of Seller
Parent or any of the Sellers, (iii) such confidential information becomes
available to Seller Parent or any of the Sellers from a third party who to their

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<PAGE>

knowledge, is under no confidential fiduciary obligation to the CRL Business,
Recap Co, the Recap Subsidiaries or Buyer with respect to such confidential
information, or (iv) such confidential information is used in connection with
reflecting, asserting or defending Seller Parent's or any of the Seller's
ownership of the CRL Business prior to the Closing Date.

           5.18 Closing Efforts. Each of Buyer, Buyer Parent and Seller Parent
shall use their respective Commercial Efforts to consummate the transactions
contemplated hereby.

           5.19 Interim Financial Statements. Seller Parent will, or will cause
its Affiliates to, maintain the books and records of the CRL Business, on a
basis consistent with past practice, and Seller Parent will furnish, or will
cause its Affiliates to furnish, Buyer for each complete fiscal quarter
occurring after June 26, 1999, financial statements (the "Quarterly Financial
Statements") of the CRL Business, including consolidated statements of income,
changes in shareholders' equity and cash flows and a consolidated balance sheet,
all prepared in accordance with GAAP (but without footnotes) on a basis
consistent with the preparation of the Unaudited Financial Statements, within
fifteen (15) days of the end of such fiscal quarter ending on or prior to the
Closing.

           5.20 Financial Assurances. As promptly as practicable after the
Closing Date, Buyer shall provide to Seller Parent evidence of the release of
Seller Parent or any Seller from, the cancellation of Seller Parent's or any
Seller's obligation under, or the substitution of Buyer, Recap Co, Recap Subco
or any Recap Subsidiary for Seller Parent or any Seller in, the financial
assurances or Letters of Credit related to the CRL Business set forth on
Schedule 5.20 of the Disclosure Schedule (the "Financial Assurances"), which
evidence shall be in form and substance reasonably satisfactory to Seller
Parent.

           5.21 Financial Statements.

           5.21.1 On or before August 4, 1999, Seller Parent shall deliver to
Buyer the audited consolidated balance sheets of the CRL Business as of December
26, 1998 and December 27, 1997 and the related audited consolidated statements
of income, changes in shareholder's equity and cash flows, including the notes
thereto, for each of the three years in the period ended December 26, 1998, with
an unqualified report thereon by PricewaterhouseCoopers LLP (the "Audited
Financial Statements").

           5.21.2 On or before August 4, 1999, Seller Parent shall deliver to
Buyer the final unaudited consolidated balance sheet of the CRL Business as of
June 26, 1999, and the related unaudited consolidated statements of income and
cash flows, including the notes thereto, for the six-month periods ended June
26, 1999 and June 27, 1998 (the "Unaudited Financial Statements"). The Audited
Financial Statements and the Unaudited Financial Statements are collectively
referred to as the "Financial Statements."

           5.21.3 On or before midnight on the second Business Day after the
date of delivery of the Financial Statements, Buyer shall provide a written
notice (the "Notice") to Seller Parent which states whether or not the Financial
Statements comply with the following (the "Standards"): (i) as to the Audited
Financial Statements: (A) the Audited Financial Statements are substantially

                                       39

<PAGE>

identical to the Draft Audited Financial Statements with respect to the
consolidated balance sheets as at December 27, 1997 and December 26, 1998 and
the related consolidated statements of income and changes in shareholder's
equity for each of the three years in the period ended December 26, 1998, (B)
the Audited Financial Statements are substantially identical to the Draft
Audited Financial Statements with respect to the line items in the consolidated
cash flow statements for each of the three years in the period ended December
26, 1998 for cash and cash equivalents at the beginning of the applicable
period, cash and cash equivalents at the end of the applicable period,
depreciation, amortization and capital expenditures, in each case for the
applicable periods, and (C) the notes to the Audited Financial Statements are
substantially identical as to form with the notes to the Draft Audited Financial
Statements, and the notes to the Audited Financial Statements contain the
financial information required by GAAP to be contained therein; and (ii) as to
the Unaudited Financial Statements: (A) the Unaudited Financial Statements are
substantially similar to the Draft Unaudited Financial Statements with respect
to the consolidated balance sheet as of June 26, 1999 and the related
consolidated statements of income for the six month periods ended June 26, 1999
and June 27, 1998, (B) the Unaudited Financial Statements are substantially
similar to the Draft Unaudited Financial Statements with respect to the line
items in the consolidated cash flow statements for the six month periods ended
June 26, 1999 and June 27, 1998 for cash and cash equivalents at the beginning
of the applicable period, cash and cash equivalents at the end of the applicable
period, depreciation, amortization and capital expenditures, in each case for
the applicable periods, and (C) the notes to the Unaudited Financial Statements
are substantially similar as to form with the notes to the Draft Unaudited
Financial Statements, and the notes to the Unaudited Financial Statements
contain the financial information required by GAAP to be contained therein. If
the Notice states that the Financial Statements are not in conformity with the
Standards, or if Buyer provides a written notice to Seller Parent after August
4, 1999 that the Financial Statements have not been delivered to Buyer, this
Agreement automatically shall terminate and be of no further force and effect.
If the Notice states that the Financial Statements are in conformity with the
Standards, or if the Notice is not timely given, this Agreement shall continue
in full force and effect in accordance with its terms.

           5.22 Net Underfunding Amount. Ten (10) Business Days prior to the
Closing Date, Seller Parent shall deliver to Buyer its calculation of the Net
Underfunding Amount, together with supporting documentation. Seller Parent and
Buyer shall use their Commercial Efforts to reach agreement on the Net
Underfunding Amount. In the event they are unable to reach agreement within
three Business Days after Buyer's receipt of Seller Parent's calculation, Arthur
Andersen LLP shall be engaged to determine the Net Underfunding Amount and Buyer
and Seller Parent shall be bound by its determination. The fees and expenses of
Arthur Andersen LLP shall be paid 50% by Buyer and 50% by Seller Parent.

                                   ARTICLE 6

                              CONDITIONS TO CLOSING

           6.1 Conditions to Obligations of Buyer and Seller Parent and Recap
Co. The respective obligations of Buyer, Buyer Parent, Seller Parent, the
Sellers, Recap Co and Recap


                                      40

<PAGE>

Subco to consummate the transactions contemplated by this Agreement shall be
subject to the satisfaction at or prior to the Closing of the following
conditions:

           6.1.1 (a) There shall be no injunction, restraining order or decree
of any nature of any Governmental Entity that is in effect that restrains or
prohibits the consummation of the transactions contemplated hereby, provided
that with respect to injunctions, restraining orders or decrees that do not
individually, or in the aggregate, restrain the transfer of a material portion
of the CRL Business Assets (an "Immaterial Injunction"), Buyer shall be required
to use Commercial Efforts to remove such Immaterial Injunction by entering into
an agreement with the applicable Governmental Entity to divest such enjoined CRL
Business Assets after the Closing Date, or Buyer shall have the right to require
Seller Parent to divest the enjoined CRL Business Assets on or prior to the
Closing Date, and in either case Buyer shall be entitled to the proceeds of such
divestiture.

           (b) Subject to Section 5.2.2, all consents, approvals, authorizations
and orders of Governmental Entities that are necessary to permit the
consummation of the transactions contemplated by this Agreement and which are
set forth on Schedule 6.1.1 (the "Governmental Consents") shall have been
obtained in form and substance reasonably satisfactory to Buyer and Seller
Parent, and, without limiting the foregoing, all applicable waiting periods
specified under the HSR Act and applicable foreign antitrust and competition
Laws with respect to the transactions contemplated by this Agreement, shall have
lapsed or been terminated.

           (c) For purposes of Section 6.1.1(a), a material portion of the CRL
Business Assets shall mean CRL Business Assets generating aggregate annual
revenues exceeding $15,000,000 based on the fiscal year ended December 26, 1998.

           6.2 Conditions to Obligations of Buyer. The obligations of Buyer to
consummate the transactions contemplated by this Agreement are subject to the
satisfaction (or waiver in writing by Buyer) at or prior to the Closing of each
of the following conditions:

           6.2.1 Each representation and warranty of Seller Parent contained in
this Agreement shall be true and correct on and as of the Closing Date, with the
same force and effect as though such representations and warranties had been
made on and as of the Closing Date, except (i) to the extent that any such
representation or warranty is made as of a specified date, in which case such
representation or warranty shall have been true and correct as of such date, and
(ii) to the extent that any inaccuracies in such representations and warranties,
individually or in the aggregate, have not had, and would not reasonably be
expected to have, a CRL Business Material Adverse Effect.

           6.2.2 Seller Parent, Recap Subco and each Seller shall have performed
all obligations and agreements, and complied with all covenants and conditions,
contained in this Agreement to be performed or complied with by each of them
prior to or on the Closing Date except to the extent that any breaches of such
obligations, agreements, covenants and conditions, individually or in the
aggregate, have not had, and would not reasonably be expected to have, a CRL
Business Material Adverse Effect.

                                       41
<PAGE>

           6.2.3 Buyer shall have received a certificate of Seller Parent, dated
the Closing Date and executed by an officer of Seller Parent, to the effect that
each of the representations and warranties of Seller Parent contained in this
Agreement is true and correct on the Closing Date as if made on such Date,
except as set forth in the Update, and that the Update is true and correct.

           6.2.4 The Affiliates of Parent, other than the CRL Business
employees, who are directors and officers of Recap Subco and the Recap
Subsidiaries and who have been requested to resign by Buyer shall have tendered
their resignations effective as of the Closing Date.

           6.2.5 Buyer shall have received evidence satisfactory to Buyer of
receipt of the consents or approvals to the consummation of the transactions
contemplated by this Agreement and the Internal Reorganization under (or, as
applicable, the taking of the indicated action in connection with the
transactions contemplated by this Agreement and the Internal Reorganization with
respect to) the contracts, agreements, leases, other instruments, licenses and
other items which have been designated with an asterisk in Schedule 3.4 of the
Disclosure Schedule, which consents, approvals and actions shall be in form and
substance reasonably satisfactory to Buyer.

           6.2.6 On the Closing Date, Seller Parent shall have delivered to
Buyer all of the following:

                     (i)       stock certificates representing the Purchased
                               Shares. Each such certificate evidencing the
                               Purchased Shares shall be duly endorsed in blank,
                               or be accompanied by stock transfer powers duly
                               executed in blank, and shall be accompanied by
                               all requisite documentary or stock transfer taxes
                               affixed thereto and canceled;

                     (ii)      all stock certificates, minute books, stock
                               books, ledgers and registers, corporate seals and
                               other corporate records relating to the
                               organization, ownership and maintenance of Recap
                               Subco and each Recap Subsidiary which are not
                               located at Recap Subco or any Recap Subsidiary in
                               Wilmington, Massachusetts or at the principal
                               place of business of Recap Subco or any Recap
                               Subsidiary;

                     (iii)     original or copies of consents, filings,
                               authorizations, approvals and other actions
                               described in Sections 5.5.5, 6.1.1(b) or 6.2.5;

                     (iv)      certificates as to the valid existence and good
                               standing of Recap Subco and each Recap Subsidiary
                               which is organized under the Laws of the United
                               States of America (or other appropriate
                               certificates in those jurisdictions that do not
                               issue such good standing certificates) from the
                               Secretary of State or other appropriate
                               Governmental Entity of each of such Person's
                               respective jurisdiction of incorporation,
                               organization or formation, as the case may be,
                               dated as of a date within thirty (30) days of the
                               Closing Date; and

                     (v)       a true and correct copy of the certificate of
                               incorporation or articles of organization, as the
                               case may be, by-laws or other organizational


                                       42
<PAGE>

                               documents of each of Recap Co, Recap Subco and
                               each Recap Subsidiary which is organized under
                               the Laws of the United States of America,
                               certified as true and correct by the Secretary or
                               Assistant Secretary of Seller Parent.

           6.2.7 Seller Parent, Recap Co and each other stockholder of Recap Co
(other than Buyer) shall have executed and delivered to Buyer the Investors'
Agreement.

           6.2.8 Buyer, Recap Co and Recap Subco shall have received debt and
equity proceeds in the amounts and on the terms and conditions set forth in the
Commitment Letters or such other terms and conditions satisfactory to Buyer.

           6.2.9 Buyer shall have received an opinion of counsel for Seller
Parent, Recap Co, Recap Subco and the Sellers, dated the date of the Closing, in
form and substance reasonably satisfactory to Buyer.

           6.3 Conditions to Obligations of Seller Parent, the Sellers, Recap Co
and Recap Subco. The obligations of Seller Parent, each Seller, Recap Co and
Recap Subco to consummate the transactions contemplated by this Agreement are
subject to the satisfaction (or waiver in writing by Seller Parent) at or prior
to the Closing of each of the following conditions:

           6.3.1 Each of the representations and warranties of Buyer contained
in this Agreement shall be true and correct on and as of the Closing Date, with
the same force and effect as though such representations and warranties had been
made on and as of the Closing Date, except (i) to the extent that any such
representation or warranty is made as of a specified date, in which case such
representation or warranty shall have been true and correct as of such date, and
(ii) to the extent that any inaccuracies in such representations and warranties,
individually or in the aggregate, have not had, and would not reasonably be
expected to have, a Buyer Material Adverse Effect.

           6.3.2 Buyer shall have performed all obligations and agreements, and
complied with all covenants and conditions, contained in this Agreement to be
performed or complied with by it prior to or on the Closing Date except to the
extent that any breaches of such obligations, agreements, covenants and
conditions, individually or in the aggregate, have not had, and would not
reasonably be expected to have, a Buyer Material Adverse Effect.

           6.3.3 Seller Parent shall have received a certificate of Buyer, dated
the Closing Date and executed by an officer of Buyer, to the effect that the
conditions specified in Sections 6.3.1 and 6.3.2 above have been fulfilled.

           6.3.4 Buyer, Recap Co and each other stockholder of Recap Co (other
than CRL) shall have executed and delivered to Seller Parent the Investors'
Agreement.

           6.3.5 Seller Parent shall have received an opinion of counsel for
Buyer and Buyer Parent, dated the date of the Closing, in form and substance
reasonably satisfactory to Seller Parent.

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<PAGE>

                                   ARTICLE 7

                           TERMINATION AND ABANDONMENT

7.1        Termination.

           7.1.1 This Agreement maybe terminated at anytime prior to the Closing
Date:

           (a) by mutual written consent of Seller Parent and Buyer;

           (b) by either Seller Parent or Buyer, if: (i) the Redemptions, Merger
and Recapitalization shall not have been consummated on or prior to the date
which is three (3) months after the date hereof; provided, however, that the
right to terminate this Agreement pursuant to this Section 7.1.1(b) shall not be
available to any party whose breach of any of its representations, warranties,
covenants or other agreements under this Agreement or failure to perform any of
its obligations under this Agreement results in the failure of the transactions
contemplated by this Agreement to be consummated by such time; or (ii) subject
to Section 5.2.2 any Governmental Entity shall have issued an order, decree or
ruling or taken any other action permanently enjoining, restraining or otherwise
prohibiting the consummation of the transactions contemplated by this Agreement
and such order, decree or ruling or other action shall have become final and
non-appealable (but only if the terminating party (if it has standing to do so)
shall have used its Commercial Efforts to cause such order, decree or ruling or
other action to be lifted or vacated);

           (c) by Seller Parent, if (i) Buyer or Buyer Parent shall have
breached any of its representations, warranties, covenants or other agreements
contained in this Agreement, which breach or failure to perform is incapable of
being cured or has not been cured within 20 days after the giving of written
notice thereof to Buyer and such breach, individually or in the aggregate, has
had or would reasonably be expected to have, a Buyer Material Adverse Effect;
provided, however, that Seller Parent may not terminate this Agreement pursuant
to this Section 7.1.1(c) if Seller Parent, Recap Subco, Recap Co or any Seller
is then in breach in any material respect of any of such Person's
representation, warranty, covenant or agreement contained in this Agreement, or
(ii) one or more of the Commitment Letters have been terminated or have expired
and substitute commitment letters, on substantially the same terms and
conditions, have not been entered into by Buyer at the time of such termination
or expiration.

           (d) by Buyer, if Seller Parent, Recap Co, Recap Subco or any Seller
shall have breached any of such Person's representations, warranties, covenants
or other agreements contained in this Agreement, which breach or failure to
perform is incapable of being cured or has not been cured within 20 days after
the giving of written notice thereof to Seller Parent and such breaches,
individually or in the aggregate, have had or would reasonably be expected to
have, a CRL Business Material Adverse Effect; provided, however, that Buyer may
not terminate this Agreement pursuant to this Section 7.1.1(d) if Buyer is then
in breach in any material respect of any representation, warranty, covenant or
agreement contained in this Agreement.

           7.1.2 The party desiring to terminate this Agreement pursuant to
Section 7.1.1 shall give written notice of such termination to the other party
in accordance with Section 9.5 below.

                                       44
<PAGE>

           7.1.3 This Agreement shall automatically terminate under the
circumstances set forth in Section 5.21.3.

           7.2 Effect of Termination and Abandonment. In the event of
termination of this Agreement and the abandonment of the transactions
contemplated by this Agreement pursuant to this Article 7, this Agreement (other
than as set forth in this Section 7.2 and Sections 9.1 (Public Announcement),
9.2 (Expenses), 9.5 (Notices) and 9.14 (Applicable Law)) shall become void and
of no effect with no liability on the part of any party hereto (or of any of its
directors, officers, employees, agents, legal or financial advisors or other
representatives); except nothing contained in this Agreement shall relieve any
party from any liability for any inaccuracy, misrepresentation or breach of any
representation, warranty, covenant or agreement contained in this Agreement
prior to such termination.

                                   ARTICLE 8

                          SURVIVAL AND INDEMNIFICATION

           8.1 Survival of Representations, Warranties and Covenants. The
representations and warranties of the parties contained in this Agreement shall
survive the Closing for the periods set forth in this Section 8.1. The
representations and warranties of Seller Parent and Recap Co shall survive the
Closing and the representations and warranties of Buyer and Buyer Parent shall
survive the Closing until the close of business on March 31, 2001 (the
"Expiration Date"), provided, however, that the representations and warranties
contained in Sections 3.1, 3.2, 3.3, 3.5, 3.12(a)(i), (ii) and (iv), 4.1, 4.2,
4.3., and 4.7 shall survive the Closing until the sixth year anniversary of the
Closing Date with respect to claims which may be asserted in connection with a
breach thereof, the representations and warranties contained in Section 3.16
shall survive the Closing for four years with respect to claims which may be
asserted in connection with a breach thereof, and the representations and
warranties that are the subject of any indemnification claim shall survive
indefinitely, but only with respect to such indemnification claim until such
claim is finally resolved. The covenants and agreements made by any party which
are to be performed after the Closing Date shall survive until fully performed
and the covenants and agreements made by any party which are to be performed at
or prior to the Closing Date shall expire at the Closing other than Article 2
and Sections 5.6.5, 5.10 and 5.11.

           8.2 Indemnification by Seller Parent. Subject to the applicable
limitations set forth in Section 8.4 and in the manner herein provided, from and
after the Closing Date, Seller Parent shall indemnify and hold harmless Recap
Co, Recap Subco, each Recap Subsidiary, Buyer and its Affiliates, and their
respective employees, directors, agents and representatives (collectively, the
"Buyer Indemnified Parties"), from and against any and all Loss and Litigation
Expense, which they or any of them may suffer or incur as a result of or arising
from any of the following: (a) any misrepresentation or breach of any
representation or warranty of Seller Parent contained in this Agreement or in
any certificate delivered pursuant hereto including, without limitation,
pursuant to Section 6.2.3 or as a result of an Update; or (b) the failure by
Seller Parent, any Seller, Recap Co or Recap Subco to perform any of such
Person's covenants and agreements under this Agreement (in the case of Recap Co
and Recap Subco, covenants and agreements to be performed on or prior to the
Closing Date); or (c) any Excluded Liability.

                                       45
<PAGE>

           8.3 Indemnification by Recap Co. Subject to the applicable
limitations set forth in Section 8.4 and in the manner herein provided, from and
after the Closing Date, Recap Co shall indemnify and hold harmless Seller
Parent, its Affiliates and their respective employees, directors, agents and
representatives (collectively, the "Seller Indemnified Parties"), from and
against any and all Loss and Litigation Expense which they, or any of them, may
suffer or incur as a result of or arising from any of the following: (a) any
misrepresentation or breach of warranty of Buyer or Buyer Parent contained in
this Agreement; (b) the failure by Buyer, Buyer Parent or, after the Closing
Date, Recap Co or Recap Subco to perform any of such Person's covenants and
agreements under this Agreement (in the case of Recap Co and Recap Subco,
covenants and agreements to be performed after the Closing Date); (c) any
Assumed Liability; or (d) the conduct of the CRL Business after the Closing Date
except to the extent the Losses or Litigation Expense resulted from the conduct
of the CRL Business prior to the Closing Date. Any indemnity payable pursuant to
Section 8.3(a) or Section 8.3(b) (but only with respect to the covenants and
agreements, contained in Section 5.15), shall be increased by an amount equal to
the sum of (i) such Loss and Litigation Expense and (ii) the product of such
amount and Seller's Equity Percentage at the time.

           8.4 Certain Limitations on Indemnities

           8.4.1 Subject to the terms hereof, the aggregate liability of Seller
Parent or Recap Co, as the case may be, for Losses and Litigation Expenses under
Sections 8.2(a) or 8.3(a), respectively, other than Losses and Litigation
Expenses arising from any inaccuracy or breach of any of the representations and
warranties contained in Sections 3.1, 3.2, 3.3, 3.5, 3.12(a)(iv), 4.1, 4.2, 4.3,
and 4.7 (in which case the limits set forth in this Section 8.4.1 shall be
inapplicable), is, and shall be, limited to an amount equal to $100,000,000.

           8.4.2 No Buyer Indemnified Party nor any Seller Indemnified Party
shall be entitled to indemnification pursuant to Sections 8.2(a) or 8.3(a)
hereof unless and until the aggregate amount of all Losses and Litigation
Expenses sustained or incurred by all Buyer Indemnified Parties or all Seller
Indemnified Parties, as the case may be, under Sections 8.2(a) or 8.3(a),
respectively, exceeds an aggregate amount (the "Basket Amount") equal to
$4,000,000, and then only for the amount of such excess, provided however, that
the limit set forth in this Section 8.4.2 shall not be applicable for Losses or
Litigation Expenses for any indemnification obligation arising under (a) Section
8.2(a) (to the extent relating to misrepresentations, inaccuracies or breaches
of the representations and warranties contained in Sections 3.1, 3.2, 3.3, 3.5,
3.9, 3.12(a)(iv)) or (b) Section 8.3(a) (to the extent relating to
misrepresentations, inaccuracies or breaches of the representations and
warranties contained in Sections 4.1, 4.2, 4.3, or 4.7).

           8.4.3 Any indemnity payable pursuant to this Agreement shall be
decreased to the extent of any insurance proceeds (net of all Costs payable in
connection therewith) actually received by a Buyer Indemnified Party or Seller
Indemnified Party or which a Buyer Indemnified Party or a Seller Indemnified
Party is unconditionally entitled to receive in respect of the Loss giving rise
to such indemnity payment.

           8.4.4 The indemnifying party under Sections 8.2(a) and 8.3(a) shall
not be liable to any Indemnified Party with respect to any occurrence, event,
circumstance, act, omission or conduct unless such matter or a series of related
matters arising from the same or similar occurrences, events, circumstances,

                                       46

<PAGE>


acts, omissions or conduct which causes a representation or warranty under
Sections 8.2(a) or 8.3(a) to be breached results in Costs of $25,000 or more,
and then only for the amount of such excess.

           8.4.5 Each indemnified party shall be obligated, in connection with
any claim for indemnification under Section 8.2 or 8.3, to use Commercial
Efforts to mitigate Losses upon and after becoming aware of any event which
could reasonably be expected to give rise to such Losses.

           8.5 Procedure. Promptly after acquiring knowledge of any Loss, or any
action, suit, investigation, proceeding, demand, assessment, audit, judgment, or
claim ("Claim") which may result in a Loss or Litigation Expense, the Person
seeking indemnity under this Article 8 (the "Indemnitee") shall give written
notice thereof to the party from whom indemnity is sought (the "Indemnitor");
provided, however, that the failure to promptly notify the Indemnitor shall not
affect the indemnification obligation hereunder if the Indemnitor was not
prejudiced thereby and the failure to promptly notify was inadvertent. The
Indemnitor shall have the right, at its expense, to defend or contest (subject
to the third to last sentence of this Section 8.5) such Claim, through counsel
of its choice (unless such Indemnitor is relieved of its liability hereunder
with respect to such Claim and Loss and Litigation Expense by the Indemnitee)
and shall not then be liable for fees or expenses of the Indemnitee's attorneys
(unless the Indemnitor and Indemnitee are parties to the action and there exists
a conflict of interest between the Indemnitor and the Indemnitee, in which event
the Indemnitor will be responsible for the reasonable fees and expenses of one
firm of counsel for all Indemnitees), and the Indemnitee and the Indemnitor
shall provide to each other all necessary and reasonable cooperation in the
defense of all Claims, including, but not limited to, reasonable access to
employees who are familiar with the transactions out of which such Claim or Loss
may have arisen. In the event that the Indemnitor shall undertake to defend any
Claim, it shall promptly notify the Indemnitee of its intention to do so within
thirty (30) days of being notified of any such Claim. In the event that the
Indemnitor, after written notice from Indemnitee, fails to take timely action to
defend the same, the Indemnitee shall have the right to defend the same by
counsel of its own choosing, but at the cost and expense of the Indemnitor,
provided no settlement of a Claim by Indemnitee (other than a Claim relating to
an Excluded Liability) shall be effected without the consent of the Indemnitor
which shall not be unreasonably withheld or delayed unless Indemnitee waives any
right to indemnification therefor. The Indemnitor may settle or compromise any
Claim without the prior written consent of Indemnitee except for settlement or
compromise of a Claim (i) which includes the unconditional release by the Person
asserting the Claim and any related claimants of Indemnitee from all liability
with respect to such Claim in form and substance reasonably satisfactory to
Indemnitee, (ii) which would not adversely affect the Indemnitee and its
Affiliates to own, hold, use and operate their respective assets and businesses,
and (iii) for money damages only. Seller Parent and Buyer shall treat any
payment under this Article 8 for all Tax purposes as an adjustment of the
Purchase Price and as allocable to the assets deemed purchased under the Section
338(h)(10) Election as shall reasonably be determined by the Indemnitee, except
to the extent such treatment is not permitted under applicable Law.

           8.5.1 (a)  The amount of any indemnification payment otherwise
determined to be due under this Article 8 shall be reduced (but not increased)
by the amount of the "Actual Tax Savings" (as hereinafter defined), if any,
realized by the Indemnitee with respect to the


                                      47

<PAGE>


indemnified Loss. For purposes hereof, the amount of an Indemnitee's Actual
Tax Savings shall be equal to the excess, if any, of the Actual Tax Benefit
Amount over the Actual Tax Detriment Amount, each as defined below and each of
which shall be calculated taking into account only those items of tax savings
or tax liabilities actually incurred by the Indemnitee in the taxable year in
which the indemnification payment is made (taking into account all of the
indemnitee's tax attributes for the period or periods in question).

           (b) The Actual Tax Benefit Amount shall equal the actual
amount of any reduction of the Indemnitee's federal, state

or local (but not foreign) income tax liability for the taxable year in which
the indemnification payment is made, which reduction would not have been
realized but for the occurrence of the event in respect of which the
indemnification payment is made or the receipt of the indemnification payment.
The Actual Tax Detriment Amount shall equal the actual amount of any increase in
the Indemnitee's federal, state or local (but not foreign) income tax liability
for the taxable year in which the indemnification payment is made, which
increase would not have been realized but for the occurrence of the event in
respect of which the indemnification payment is made or the receipt of the
indemnification payment.

           (c) The parties agree that any determination made under this
Section 8.5.1 shall be made by the Indemnitee, who shall provide the
Indemnitor with its calculation of the Actual Tax Savings in writing. The
parties shall attempt to resolve any dispute over such determination in good
faith, provided that if such dispute is not resolved by the parties such
determination shall be made by the national accounting firm regularly employed
by the Indemnitee.

           8.6 No Consequential Damages. NEITHER ANY PARTY TO THIS AGREEMENT NOR
THEIR AFFILIATES SHALL BE LIABLE FOR CONSEQUENTIAL DAMAGES SUFFERED BY A PARTY
OR ITS AFFILIATES WITH RESPECT TO ANY TERM OR THE SUBJECT MATTER OF THIS
AGREEMENT; PROVIDED, HOWEVER, THAT THIS WAIVER SHALL NOT LIMIT ANY LIABILITY
OF ANY PARTY TO INDEMNIFY THE APPLICABLE INDEMNIFIED PARTIES FOR LOSS OR
LITIGATION EXPENSES ARISING FROM COSTS OF SUCH TYPE WHICH THE INDEMNIFIED
PARTY IS REQUIRED TO PAY TO ANY OTHER PERSON.

           8.7 Exclusive Remedy. If the Closing occurs, the exclusive remedies
for any breach of any representation, warranty, covenant or agreement
hereunder shall be the indemnification provided by this Article 8, and each
party expressly waives any other rights or remedies it may have, whether under
this Agreement or otherwise, or (other than in the case of fraudulent conduct)
at law or in equity, provided, however, that equitable relief, including the
remedies of specific performance and injunction shall be available with
respect to any actual or attempted breach of this Agreement occurring before
the Closing Date or with respect to the breach of any covenant to be performed
after the Closing Date.

           8.8 Validity. The indemnification agreements provided for in this
Article 8 shall apply notwithstanding any knowledge of, or any investigation
made at any time by or on behalf of, any party hereto.


                                      48
<PAGE>


           8.9 Waiver. It is understood and agreed that neither Seller Parent
nor any Seller shall be entitled to any indemnification, right of contribution
or other right of recovery from Recap Co, Recap Subco or any Recap Subsidiary
in connection with any claim made by any Buyer Indemnification Party(s)
against Seller Parent hereunder, all of which are hereby irrevocably and
unconditionally waived and released by Seller Parent and each Seller;
provided, however, such waiver shall not preclude Seller Parent or any Seller
from contesting any such claims made by any Buyer Indemnified Party,
including, without limitation, on the basis that the alleged Loss or
Litigation Expense arose, in whole or in part, as a result of the operation of
the CRL Business after the Closing Date or arose out of an Assumed Liability.


                                  Article 9

                                 MISCELLANEOUS

           9.1 Public Announcement. Except in furtherance by Buyer and Buyer
Parent of its covenants in Sections 5.14 and 5.18 and notwithstanding anything
contained in this Agreement, no news release or other public announcement
pertaining in any way to the transactions contemplated by this Agreement will
be made by any party without the prior consent of the other parties (which
consent shall not be unreasonably withheld, conditioned or delayed) unless
such release or announcement is required by applicable Laws or pursuant to any
applicable listing agreement with, or rules or regulations of, the NYSE, in
which case the disclosing party, prior to making such announcement, shall
consult with the other parties. In the event the transactions contemplated by
this Agreement are not consummated, each party shall return to the other all
documents, work papers and other materials, including any extracts, summaries,
analyses, compilations or other documents prepared by the receiving party or
its representatives from such information (including any copies thereof
whether in written, electronic or other format) or destroy such materials and
provide to the other a written certification of such destruction and will hold
in absolute confidence any information obtained from the other party except to
the extent (i) such party is required to disclose such information by Law or
such disclosure is necessary or desirable in connection with the pursuit or
defense of a claim relating to the transactions contemplated hereby, (ii) such
information was known by such party prior to such disclosure or was thereafter
developed or obtained by such party independent of such disclosure, or (iii)
such information becomes generally available to the public or is otherwise no
longer confidential. Prior to any disclosure of information pursuant to the
exception in clause (i) of the preceding sentence, the party intending to
disclose the same shall so notify the party that provided the same in order
that such party may seek a protective order or other appropriate remedy should
it choose to do so.

           9.2 Expenses. Subject to the provisions of Sections 7.2 and 9.3,
whether or not the transactions contemplated by this Agreement are completed,
each of the parties hereto shall pay the fees and expenses incurred by it in
connection with the negotiation, preparation, execution and performance of
this Agreement, including, without limitation, attorneys', accountants',
brokers' and other advisors' fees.

           9.3 Transfer Taxes and Recording Expenses. All excise, sales, use,
transfer, stamp, documentary, filing, recording and other similar taxes or
fees which may be imposed or assessed



                                      49
<PAGE>

as the result of the transactions contemplated hereby, including, without
limitation, the Merger and Redemptions ("Transfer Taxes"), together with any
interest or penalties with respect thereto, shall be shared by the Seller
Parent and Recap Co as follows: the first $100,000 shall be paid by Seller
Parent, the second $100,000 shall be paid by, and all amounts in excess of
$200,000 shall be paid 50% by Recap Co and 50% by Seller Parent. All excise,
sales, use, transfer, stamp, documentary, filing, recording and other similar
taxes or fees which may be imposed or assessed as the result of the Internal
Reorganization, together with any interest or penalties with respect thereto
("Reorganization Transfer Taxes"), shall be paid 56.25% by Recap Co and 43.75%
by Seller Parent. All Tax Returns required to be filed in connection with any
Transfer Taxes or Reorganization Transfer Taxes ("Transfer Tax Returns") shall
be prepared and filed when due by the party responsible under applicable Law
or custom to file such Transfer Tax Returns. The filing party shall promptly
provide the other applicable parties with copies of such Transfer Tax Returns.
All Transfer Tax Returns shall be prepared on a basis consistent with Schedule
5.5.5 of the Disclosure Schedule. From time to time but not later than ninety
(90) days after the Closing Date, Seller Parent shall provide notice to Buyer
of any Transfer Taxes and Reorganization Transfer Taxes paid by Seller Parent
or its Affiliates and Buyer shall promptly reimburse Seller Parent or its
Affiliates as applicable in accordance with the provisions of this Section
9.3. From time to time but not later than ninety (90) days after the Closing
Date, Buyer shall provide notice to Seller Parent of any Transfer Taxes and
Reorganization Transfer Taxes paid by Buyer or its Affiliates and Seller
Parent shall promptly reimburse Buyer or its Affiliates as applicable in
accordance with the provisions of this Section 9.3. Seller Parent shall pay
all interest or penalty charges associated with Seller Parent's failure to pay
when due any Transfer Taxes or any Reorganization Transfer Taxes, provided
that such failure is not the result of Buyer's failure to remit amounts agreed
to be paid under this Section 9.3 to Seller Parent promptly upon request.

           9.4 Knowledge. Whenever used in this Agreement, the words "knowledge"
of Seller Parent or similar words or phrases shall mean the actual knowledge
of those officers of Seller Parent or the CRL Business who are listed on
Schedule 9.4(a) and the words "knowledge" of Buyer or similar words or phrases
shall mean the actual knowledge of those officers of Buyer, Buyer Parent or
its Affiliates who are listed on Schedule 9.4(b).

           9.5 Notices. All notices, requests, demands and other communications
which are required or may be given under this Agreement shall be in writing
and shall be deemed to have been duly given if delivered personally, if sent
by telecopier or facsimile or sent by a recognized overnight courier service
or mailed, first class mail, postage prepaid, return receipt requested, as
follows:

                     (a) If to Seller Parent or, prior to the Closing
Date, to Recap Co or Recap Subco:

                     Bausch & Lomb Incorporated
                     One Bausch & Lomb Place
                     Rochester, New York 14604-2701
                     Attention:  Alan H.  Farnsworth
                     Vice President - Business Development
                     Fax: (716)338-8706


                                      50
<PAGE>


                     with copies to:

                     Bausch & Lomb Incorporated
                     One Bausch & Lomb Place
                     Rochester, New York 14604-2701
                     Attention:  Robert B. Stiles, Esq.

                     Senior Vice President and General Counsel
                     Fax: (716)338-5043

                     Nixon Peabody LLP

                     P.O. Box 1051
                     Clinton Square

                     Rochester, New York 14604
                     Attention:  Lori B. Green, Esq.
                     Fax:  (716) 263-1600

                     (b) If to Buyer or Buyer Parent or, after the Closing Date,
to Recap Co or Recap Subco:

                     DLJ Merchant Banking Partners
                     277 Park Avenue
                     New York, New York 10172
                     Attention:  Ivy Dodes
                     Fax:  (212) 892-2609

                     with a copy to:

                     Haythe & Curley
                     237 Park Avenue
                     New York, New York 10017
                     Attention:  Bradley P. Cost, Esq.
                     Fax:  (212) 682-0200

or to such other address as either party shall have specified by notice in
writing to the other party. All such notices, requests, demands and
communications shall be deemed to have been given on the date of personal
delivery or upon confirmed receipt to the person to whom addressed if sent by
telecopier, overnight courier service or mail.

           9.6 Severability. The provisions of this Agreement shall be deemed
severable and the invalidity or unenforceability of any provision shall not
affect the validity or enforceability of the other provisions hereof. If any
provision of this Agreement, or the application thereof to any Person or any
circumstance, is invalid or unenforceable, (a) a suitable and equitable
provision shall be substituted therefor in order to carry out, so far as may
be valid and enforceable, the intent and purpose of such invalid or
unenforceable provision and (b) the remainder of this Agreement and the
application of such provision to other persons, entities or circumstances
shall not be affected by such invalidity or unenforceability.


                                      51
<PAGE>


           9.7 Specific Performance. The parties hereto agree that irreparable
damage would occur in the event that any of the provisions of this Agreement
were not performed in accordance with their specific terms or were otherwise
breached. Accordingly, the parties further agree that each party shall be
entitled to an injunction or restraining order to prevent breaches of this
Agreement and to enforce specifically the terms and provisions hereof, all
without the necessity of posting any bond or other security and without the
need to show any actual damages or that money damages would not afford an
adequate remedy, this being in addition to any other right or remedy to which
such party may be entitled under this Agreement, at law or in equity.

           9.8 No Conflict of Interest. Each of the parties to this Agreement
hereby agrees that Nixon Peabody LLP (or its successor) may serve as counsel
to Seller Parent and its Affiliates and Haythe & Curley (or its successor) may
serve as counsel to Buyer and its Affiliates in connection with the
negotiation, preparation, execution and delivery of this Agreement and the
consummation of the transactions contemplated hereunder and that either Nixon
Peabody LLP (or its successor) or Haythe & Curley (or any successor) may serve
as counsel to Seller Parent, Seller Parent's Affiliates, Buyer, Buyer's
Affiliates or any director, officer, employee or affiliate of any one or more
of them in connection with any litigation arising out of or relating to this
Agreement or the transactions contemplated by this Agreement, each of the
parties hereto hereby consenting thereto and waiving any conflict of interest
arising therefrom. This Agreement shall not limit, impair or modify any
existing agreement, arrangement or understanding relating to the
representation by Nixon Peabody LLP (or its successor) or Haythe & Curley (or
its successors) of any of the parties hereto or any beneficial owner of any
such party.

           9.9 Binding Effect; Benefit. This Agreement shall inure to the
benefit of and be binding upon the parties hereto and their respective
successors and permitted assigns. Except as provided in Article 8 with respect
to indemnification, nothing in this Agreement, expressed or implied, is
intended to confer on any Person other than the parties hereto or their
respective successors and permitted assigns, any rights, remedies, obligations
or liabilities under or by reason of this Agreement.

           9.10 Assignability. This Agreement shall not be assigned by Seller
Parent, Parent Canada, any Seller, Recap Subsidiary or Recap Co without the
prior written consent of Buyer or by Buyer without the prior written consent
of Seller Parent; provided, however, that at and after the Closing, Buyer's,
Recap Co's and Recap Subco's rights or interest under this Agreement may be
assigned, upon at least 30 days (or two (2) days in the case of clause (a)
below) prior written notice to Seller Parent, (a) to any Affiliate of Buyer,
and (b) in connection with a sale of all or substantially all of the assets of
Buyer or any of its corporate parents, or direct or indirect consolidated
subsidiaries; and provided further that at and after the Closing, Buyer's,
Recap Co's and Recap Subco's rights or interests under this Agreement may be
assigned to any bank, financial institution or other Person which has extended
credit to Recap Co, Recap SubCo, Buyer or any Affiliate of Buyer. Any
attempted assignment in violation of this Section 9.10 shall be null and void.

           9.11 Amendment, Waiver. This Agreement may be amended, supplemented
or otherwise modified only by a written instrument executed by Seller Parent
and Buyer. No waiver by any party of any of the provisions hereof shall be
effective unless explicitly set forth in writing and executed by the party so
waiving. Except as provided in the preceding sentence, no


                                      52
<PAGE>


action taken pursuant to this Agreement, including without limitation, any
investigation by or on behalf of any party, shall be deemed to constitute a
waiver by the party taking such action of compliance with any representations,
warranties, covenants or agreements contained herein or in any other document
delivered in connection herewith. The waiver by any party hereto of a breach
of any provision of this Agreement shall not operate or be construed as a
waiver of any subsequent breach. No failure on the part of any party hereto to
exercise, and no delay in exercising, any right hereunder shall operate as a
waiver thereof.

           9.12 Section Headings. The Section headings contained in this
Agreement and the table of contents to this Agreement are for reference
purposes only and shall not affect the meaning or interpretation of this
Agreement.

           9.13 Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original and all of which
together shall be deemed to be one and the same instrument.

           9.14 Applicable Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of New York without regard
to the conflicts of laws principles thereof.

           9.15 Submission to Jurisdiction. The parties hereby irrevocably and
unconditionally consent to submit to the exclusive jurisdiction of the federal
courts of the United States of America located in Monroe County, New York for
any actions, suits or proceedings arising out of or relating to this Agreement,
the Recapitalization Documents or the transactions contemplated hereby or
thereby, and the parties agree not to commence any action, suit or proceeding
relating thereto except in such courts, and further agree that service of any
process, summons, notice or document by U.S. registered mail shall be effective
service of process for any action, suit or proceeding brought against the
parties in any such court. The parties hereby irrevocably and unconditionally
waive any objection to the laying of venue of any action, suit or proceeding
arising out of this Agreement, any Recapitalization Document or the transactions
contemplated hereby or thereby, in the federal courts of the United States of
America located in Monroe County, New York, and hereby further irrevocably and
unconditionally waive and agree not to plead or claim in any such court that any
such action, suit or proceeding brought in any such court has been brought in an
inconvenient forum.

           9.16 Entire Agreement. This Agreement, including the Exhibits and the
Disclosure Schedule hereto, constitutes the entire agreement between the
parties hereto with respect to the subject matter hereof and supersedes all
prior agreements and understandings, oral and written (other than the
Confidentiality Agreement which shall not survive the Closing). There are no
restrictions, promises, representations, warranties, covenants or
undertakings, other than those expressly set forth or referred to herein.


                                      53


<PAGE>


           IN WITNESSETH WHEREOF, the parties hereto have executed and delivered
this Agreement as of the date first above written.


                                       Bausch & Lomb, Incorporated

                                       By:
                                          --------------------------------------
                                       Name:  Alan H. Farnsworth
                                       Title:  Vice President


                                       CRL Holdings, Inc.

                                       By:
                                          --------------------------------------
                                       Name:  Alan H. Farnsworth
                                       Title:  Vice President


                                       Endosafe, Inc.

                                       By:
                                          --------------------------------------
                                       Name:  Alan H. Farnsworth
                                       Title:  Vice President


                                       Bausch & Lomb International, Inc.

                                       By:
                                          --------------------------------------
                                       Name:  Alan H. Farnsworth
                                       Title:  Vice President


                                       Charles River SPAFAS, Inc.

                                       By:
                                          --------------------------------------
                                       Name:  Alan H. Farnsworth
                                       Title:  Vice President


                                       Charles River Laboratories, Inc.

                                       By:
                                          --------------------------------------
                                       Name:  Alan H. Farnsworth
                                       Title:  Vice President


                                      54
<PAGE>


                                       Wilmington Partners, L.P.

                                       By:  Wilmington Management Corp.,
                                            a General Partner

                                       By:
                                          --------------------------------------
                                       Name:  Alan H. Farnsworth
                                       Title:  Vice President


                                       Bausch & Lomb Canada, Inc.

                                       By:
                                          --------------------------------------
                                       Name:  Alan H. Farnsworth
                                       Title:  Vice President


                                       CRL Acquisition LLC

                                       By:
                                          --------------------------------------
                                       Name:  Reid Perper
                                       Title:  President

                                       DLJ Merchant Banking Partners II, L.P.

                                       By:
                                          --------------------------------------
                                       Name:  Ari Benacerraf
                                       Title:  Principal

                                      55



                                AMENDMENT NO. 1

                                      TO

                          RECAPITALIZATION AGREEMENT

         AMENDMENT dated as of September 29, 1999 (this "Amendment") to
Recapitalization Agreement dated as of the July 25, 1999 (the
"Recapitalization Agreement") by and among Bausch & Lomb Incorporated, a New
York corporation ("Seller Parent') and CRL Acquisition LLC, a Delaware limited
liability company ("Buyer"). Capitalized terms used herein and not otherwise
defined herein shall have the meanings ascribed to them in the
Recapitalization Agreement.


                              W I T N E S S E T H

         WHEREAS, Seller Parent, Buyer, Sellers, Parent Canada, Recap  Co, Recap
Subco and Buyer Parent have entered into the Recapitalization Agreement; and

         WHEREAS, the parties hereto desire to amend certain of the provisions
of the Recapitalization Agreement pursuant to Section 9.11 thereof as more
particularly described below.

         NOW, THEREFORE, in consideration of the foregoing and for other good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, and intending to be legally bound hereby, the parties hereto
hereby agree as follows:


                                  ARTICLE I.

                   AMENDMENTS TO RECAPITALIZATION AGREEMENT

         1.1 The parties hereto acknowledge and agree that Section 2.1 of the
Recapitalization Agreement is hereby amended by deleting it in its entirety
and replacing it with the following:

         "2.1 Reorganization and Stock Split. Upon the terms and subject to the
conditions of this Agreement, the parties agree that the following
transactions will take place immediately prior to the Closing in the order set
forth below (with the steps set forth in Section 2.1.2 through 2.1.5 being
hereinafter referred to as the "Stage 2 Reorganization"):

         2.1.1 Recap Co shall redeem 29,000 shares of Recap Co Common Stock
owned by Recap Subco in exchange for $1.00.

         2.1.2 Recap Subco shall form a wholly owned Canadian Corporation
("NewCanCo").

         2.1.3 WPLP shall contribute all of its CRL Business Assets used in
the CRL Business to Recapo Subco and, in exchange therefor, Recap Subco shall
issue to WPLP the Recap Subco Preferred Stock pursuant to a contribution
agreement in substantially the form of the Contribution Agreements.


<PAGE>


         2.1.4 CRL shall purchase shares of Recap Subco Common Stock in
exchange for cash and Recap Subco shall purchase shares of NewCanCo common
stock in exchange for cash.

         2.1.5 Parent Canada shall sell all of its CRL Business Assets used in
the CRL Business to NewCanCo in exchange for cash pursuant to an Asset
Purchase Agreement in substantially the form of the Contribution Agreements.

         2.1.6 Each of CRL, SPAFAS, and International shall exchange all of
the Recap Subco Common Stock owned by it for the same number of shares of
Recap Co Common Stock and WPLP shall exchange all of the Recap Subco Preferred
Stock for the same number of shares of Recap Co Preferred Stock."

         2.1.7 Recap Co shall redeem 1,000 shares of Recap Co Common Stock
owned by Recap Subco in exchange for $1.00.

         2.1.8 Recap Co shall, by way of a stock dividend, effect a stock
split of the issued and outstanding shares of Recap Co Common Stock by
declaring and paying a stock dividend of 46.6190509259 shares of Recap Co
Common Stock in respect of each issued and outstanding share of Recap Co
Common Stock (the "Stock Split").

         2.1.9 Buyer shall form a wholly owned Delaware corporation
("Acquisition Co") and contribute at least $90,000,000 thereto in exchange for
shares of common stock of Acquisition Co."

         1.2 (a) The parties hereto acknowledge and agree that Section 2.3 of
the Recapitalization Agreement is hereby amended by deleting the caption
thereto in its entirety and replacing such caption with the following:
"Redemptions; Merger."

         (b) The parties hereto acknowledge and agree that Section 2.3 of the
Recapitalization Agreement is hereby amended by deleting Section 2.3.4 thereof
in its entirety and replacing such Section 2.3.4 with the following:

         "2.3.4 Recap Co shall redeem 5,227,167 shares of Recap Co Common
Stock owned by CRL for $50,000,000 in cash, payable by wire transfer of
immediately available funds to such account as is designated by CRL, and
$43,000,000 in principal amount of the Recap Co Sub Note, and CRL shall
deliver to Recap Co certificates, duly endorsed for transfer, representing
such shares of Recap Co Common Stock."

         (c) The parties hereto acknowledge and agree that Section 2.3 of the
Recapitalization Agreement is hereby amended by adding a new Section 2.3.5
thereof to read in its entirety as follows:

         "2.3.5 Buyer and Seller Parent shall cause Acquisition Co to merge
with and into Recap Co with Recap Co being the surviving entity (the
"Merger"). At the effective time of the Merger, (i) CRL shall receive, as the
sole shareholder of Recap Co, in exchange for each one share of the 5,058,548
shares of Recap Co Common Stock issued and outstanding immediately prior to
the effective time of the Merger, $17.7916666996 and .254166808341 shares of
Recap Co Common Stock as the surviving corporation in the Merger, and (ii)
Buyer shall receive 9,000,000 shares of Recap Co Common Stock in exchange for
all of the issued and outstanding shares of Acquisition Co common stock,
constituting 87.5% of the total number of shares of Recap Co Common Stock
issued and


<PAGE>



outstanding following all of the Redemptions and the Merger,
including the number of shares so issued. The parties acknowledge that the
Merger will be treated for tax purposes as a qualified stock purchase within
the meaning of section 338(d)(3) of the Internal Revenue Code, section
1.338-1(c)(8) of the regulations thereunder and Rev. Rul. 90-95, 1990-2 C.B.
67."

         (d) The parties hereto acknowledge and agree that Section 2.3 of the
Recapitalization Agreement is hereby amended by renumbering Section 2.3.5 as
Section 2.3.6.

         1.3 The parties hereto acknowledge and agree that Section 5.5.5 of
the Recapitalization Agreement is hereby amended by deleting the phrase ", at
the Closing," in the third sentence of Section 5.5.5 and replacing such phrase
with the following:

         ",within sixty (60) calendar days after the Closing,"

         1.4 The parties hereto acknowledge and agree that Section 8.3 of the
Recapitalization Agreement is hereby amended by deleting clause 8.3(d) thereof
in its entirety and replacing such clause with the following:

         "(d) the conduct of the CRL Business after the Closing Date except to
the extent the Losses or Litigation Expense resulted from the conduct of the
CRL Business prior to the Closing Date. Any indemnity payable pursuant to
Section 8.3(a) or Section 8.3(b) (but only with respect to the covenants and
agreements, contained in Section 5.15), shall be increased by an amount equal
to the product of (i) such Loss and Litigation Expense and (ii) the Seller's
Equity Percentage at the time."

         1.5 The parties hereto acknowledge and agree that Section 8.5 of the
Recapitalization Agreement is hereby amended by deleting the fifth sentence
thereof in its entirety and replacing such sentence with the following:

         "The Indemnitor may not settle or compromise any Claim without the
prior written consent of Indemnitee except for settlement or compromise of a
Claim (i) which includes the unconditional release by the Person asserting the
Claim and any related claimants of Indemnitee from all liability with respect
to such Claim in form and substance reasonably satisfactory to Indemnitee,
(ii) which would not adversely affect the Indemnitee and its Affiliates to
own, hold use and operate their respective assets and businesses, and (iii)
for money damages only."

         1.6 The parties hereto acknowledge and agree that Section 9.3 of the
Recapitalization Agreement is hereby amended by deleting the first sentence
thereof in its entirety and replacing such sentence with the following:

         "All excise, sales, use, transfer, stamp, documentary, filing,
recording and other similar taxes or fees which may be imposed or assessed as
the result of the transactions contemplated hereby, including, without
limitation, the Merger and Redemptions ("Transfer Taxes"), together with any
interest or penalties with respect thereto, shall be shared by the Seller
Parent and Recap Co as follows: the first $100,000 shall be paid by Seller
Parent, the second $100,000 shall be paid by Recap Co, and all amounts in
excess of $200,000 shall be paid 50% by Recap Co and 50% by Seller Parent."


<PAGE>


                                  ARTICLE II.

                                 MISCELLANEOUS

         2.1 Invalidity, Etc. The provisions of this Amendment shall be deemed
severable and the invalidity or unenforceability of any provision shall not
affect the validity or enforceability of the other provisions hereof. If any
provision of this Amendment, or the application thereof to any Person or any
circumstance, is invalid or unenforceable, (a) a suitable and equitable
provision shall be substituted therefor in order to carry out, so far as may
be valid and enforceable, the intent and purpose of such invalid or
unenforceable provision and (b) the remainder of this Amendment and the
application of such provision to other persons, entities or circumstances
shall not be affected by such invalidity or unenforceability.

         2.2 Governing Law. This Amendment shall be governed by, and construed
in accordance with, the laws of the State of New York without regard to the
conflicts of laws principles thereof.

         2.3 Recitals. The section headings contained in this Amendment are
for reference purposes only and shall not affect the meaning or interpretation
of this Amendment.

         2.4 Counterparts. This Amendment may be executed in counterparts,
each of which shall be deemed an original, but all of which taken together
shall constitute one and the same instrument.

         2.5 Ratification. The parties hereto hereby ratify and approve the
Recapitalization Agreement, as amended hereby, and the parties hereto
acknowledge that all of the terms and provisions of the Recapitalization
Agreement as amended hereby, are and remain in full force and
effect.


                                  *     *     *




<PAGE>




         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be executed as of the date first above written.


                                         BAUSCH & LOMB, INCORPORATED

                                         By:
                                             -----------------------------------
                                             Name:  Alan H. Farnsworth
                                             Title: Vice President-Business
                                                    Development


                                         CRL ACQUISITION LLC

                                         By:
                                             -----------------------------------
                                             Name:  Reid Perper
                                             Title: President



                               State of Delaware
                                                                    PAGE 1
                       Office of the Secretary of State

         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
CORRECTION OF "CHARLES RIVER LABORATORIES, INC.", FILED IN THIS OFFICE ON THE
SEVENTEENTH DAY OF SEPTEMBER, A.D. 1999, AT 9 O'CLOCK A.M.





                                            /s/ Edward J. Freel
                                            ------------------------------------
                                            Edward J. Freel, Secretary of State

                                   SEAL     AUTHENTICATION:           0107432
                                            DATE:                     11-30-99





<PAGE>




                                                         STATE OF DELAWARE
                                                        SECRETARY OF STATE
                                                     DIVISION OF CORPORATIONS
                                                     FILED 09:00 AM 09/17/1999
                                                        9913900241 - 2645754


                           CERTIFICATE OF CORRECTION
                                    OF THE
                           CERTIFICATE OF AMENDMENT
                                      OF
                       Charles River Laboratories, Inc.

         The undersigned, being the Vice President of Charles River
Laboratories, Inc, (the "Corporation"), for the purpose of correcting a
Certificate of Amendment of the Corporation's Certificate of Incorporation
under Section 103(f) of the General Corporation Law of the State of Delaware,
does hereby certify:

         1. The name of the Corporation is Charles River Laboratories, Inc.

         2. The Corporation's original Certificate of Incorporation was filed
with the Secretary of State on July 25, 1996.

         3. The Corporation's Certificate of Incorporation was amended by a
Certificate of Amendment filed with the Secretary of State on August 31, 1999,

         4. The Certificate of Amendment of the Corporation's Certificate of
Incorporation filed with the Secretary of State on August 31, 1999 was an
inaccurate record of the corporation action therein referred to in that in
Paragraph First, the RESOLVED paragraph recited the name of the Corporation
as "Charles River Laboratories, Inc." instead of CRL Holdings, Inc., which was
the name of the Corporation at the time the Certificate of Amendment was
presented for filing.

         5. The true and correct amended Paragraph First of the Certificate of
Amendment of the Certificate of Incorporation, which is an accurate record of
the corporate action therein referred to, is as follows:

"FIRST: That the Board of Directors of the Corporation, by unanimous written
consent of its members, filed with the minutes of the Board, adopted a
resolution proposing and declaring advisable the following amendment to the
Certificate of Incorporation of the Corporation:

         RESOLVED: That the Certificate of Incorporation of CRL Holdings, Inc.
         be amended by changing Article I thereof so that, as amended, said
         Article shall be and read ad as follows:

         1.  The name of the Corporation is Charles River Laboratories, Inc."




<PAGE>


                                      -2-

          I, THE UNDERSIGNED, being the Vice President of the Corporation, for
the purpose of correcting the Corporation's Certificate of Incorporation under
the laws of the State of Delaware, do make, file and record this Certificate
of Correction of the Certificate of Amendment of the Certificate of
Incorporation, do certify that the facts herein stated are true, and
accordingly, have hereunto set my hand as of the 17th day of September, 1999.

                                           By: /s/ Robert B. Stiles
                                               ---------------------------------
                                                    Robert B. Stiles
                                                    Vice President

<PAGE>






                                STATE OF DELAWARE
                        OFFICE OF THE SECRETARY OF STATE

         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THAT "CHARLES RIVER LABORATORIES, INC." IS DULY INCORPORATED
UNDER THE LAWS OF THE STATE OF DELAWARE AND IS IN GOOD STANDING AND HAS A LEGAL
CORPORATE EXISTENCE NOT HAVING BEEN CANCELLED OR DISSOLVED SO FAR AS THE RECORDS
OF THIS OFFICE SHOW AND IS DULY AUTHORIZED TO TRANSACT BUSINESS.

         THE FOLLOWING DOCUMENTS HAVE BEEN FILED:

         CERTIFICATE OF INCORPORATION, FILED THE TWENTY-FIFTH
DAY OF JULY, A.D. 1996, AT 9 O'CLOCK A.M.

         CERTIFICATE OF RENEWAL, FILED THE NINTH DAY OF JULY,
A.D. 1999, AT 9 O'CLOCK A.M.

         CERTIFICATE OF AMENDMENT, CHANGING ITS NAME FROM "CHARLES RIVER BRF,
INC." TO "CRL HOLDINGS, INC.", FILED THE NINTH DAY OF JULY, A.D. 1999, AT 9
O'CLOCK A.M.

         CERTIFICATE OF AMENDMENT, CHANGING ITS NAME FROM "CRL HOLDINGS, INC."
TO "CHARLES RIVER LABORATORIES, INC.", FILED THE THIRTY-FIRST DAY OF AUGUST,
A.D. 1999, AT 9 O'CLOCK A.M.

         CERTIFICATE OF MERGER, FILED THE THIRTEENTH DAY OF
SEPTEMBER, A.D. 1999, AT 9 O'CLOCK A.M.

         CERTIFICATE OF MERGER, FILED THE THIRTEENTH DAY OF SEPTEMBER, A.D.
1999, AT 9:01 O'CLOCK A.M.

         CERTIFICATE OF MERGER, FILED THE THIRTEENTH DAY OF SEPTEMBER, A.D.
1999, AT 9:02 O'CLOCK A.M.

         CERTIFICATE OF CORRECTION, FILED THE SEVENTEENTH DAY OF SEPTEMBER, A.D.
1999, AT 9 O'CLOCK A.M.

         AND I DO HEREBY FURTHER CERTIFY THAT THE AFORESAID CERTIFICATES ARE THE
ONLY CERTIFICATES ON RECORD OF THE AFORESAID CORPORATION.

         AND I DO HEREBY FURTHER CERTIFY THAT THE SAID "CHARLES RIVER
LABORATORIES, INC." WAS INCORPORATED ON THE TWENTY-FIFTH DAY OF JULY, A.D. 1996.

         AND I DO HEREBY FURTHER CERTIFY THAT THE FRANCHISE TAXES HAVE BEEN PAID
TO DATE.

                                 /s/ Edward J. Freel
                                 -----------------------------------
                                 Edward J. Freel, Secretary of State

                                 AUTHENTICATION:  9984367
                                           DATE:  09-22-99

<PAGE>



                                State of Delaware

                        Office of the Secretary of State

                 ----------------------------------------------


         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
MERGER, WHICH MERGES:

         "CHARLES RIVER PHARMSERVICES, INC.", A MASSACHUSETTS CORPORATION,

         WITH AND INTO "CHARLES RIVER LABORATORIES, INC." UNDER THE NAME OF
"CHARLES RIVER LABORATORIES, INC.", A CORPORATION ORGANIZED AND EXISTING UNDER
THE LAWS OF THE STATE OF DELAWARE, AS RECEIVED AND FILED IN THIS OFFICE THE
THIRTEENTH DAY OF SEPTEMBER, A.D. 1999, AT 9:02 O'CLOCK A.M.

                                            /s/ Edward J. Freel
                                            -----------------------------------
                                            Edward J. Freel, Secretary of State

                                                    AUTHENTICATION:   9974664
                                                              DATE:   09-17-99
<PAGE>



                              CERTIFICATE OF MERGER

                                       OF

                        CHARLES RIVER PHARMSERVICES, INC.

                                  WITH AND INTO

                        CHARLES RIVER LABORATORIES, INC.

   (Under Section 252 of the General Corporation Law of the State of Delaware)

         The undersigned, for the purpose of merging a foreign corporation with
and into a domestic corporation under the General Corporation Law of the State
of Delaware, does hereby certify that:

         FIRST: The name and state of incorporation of each of the constituent
corporations of the merger is as follows:

         (a)     Charles River PharmServices, Inc., a Massachusetts corporation;
                 and

         (b)     Charles River Laboratories, Inc., a Delaware corporation.

         SECOND: An Agreement and Plan of Merger has been approved, adopted,
certified, executed and acknowledged by each of the constituent corporations in
accordance with the requirements of Section 252 of the General Corporation Law
of the State of Delaware.

         THIRD: The name of the surviving corporation is Charles River
Laboratories, Inc.

         FOURTH:   The Certificate of Incorporation of Charles River
Laboratories, Inc. shall be the Certificate of Incorporation of the surviving
corporation, with no amendments or changes.

         FIFTH: The executed Agreement and Plan of Merger is on file at the
principal place of business of the surviving corporation, the address of which
is 1013 Centre Road, City of Wilmington, County of Delaware.

         SIXTH: A copy of the executed Agreement and Plan of Merger will be
furnished by the surviving corporation, on request and without cost, to any
stockholder of either of the constituent corporations.

         SEVENTH: Charles River Pharmservices, Inc. had authority to issue a
single class of common stock composed of 200,000 shares of common stock, no
par value.

         IN WITNESS WHEREOF, Charles River Laboratories, Inc. has caused this
Certificate to be signed by its Vice President this 10th day of September, 1999.

DATED: September 10, 1999

                                            CHARLES RIVER LABORATORIES, INC.

                                            By:     /s/ Robert B. Stiles
                                            ------------------------------------
                                            Name:   Robert B. Stiles
                                            Title:  Vice President
<PAGE>



                                State of Delaware

                        Office of the Secretary of State

                        ---------------------------------

         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
MERGER, WHICH MERGES:

         "TEKTAGEN, INC.", A DELAWARE CORPORATION,

         WITH AND INTO "CHARLES RIVER LABORATORIES, INC." `UNDER THE NAME OF
"CHARLES RIVER LABORATORIES, INC.", A CORPORATION ORGANIZED AND EXISTING UNDER
THE LAWS OF THE STATE OF DELAWARE, AS RECEIVED AND FILED IN THIS OFFICE THE
THIRTEENTH DAY OF SEPTEMBER, A.D. 1999, AT 9:01 O'CLOCK A.M.

                                            /s/ Edward J. Freel
                                            -----------------------------------
                                            Edward J. Freel, Secretary of State

                                            AUTHENTICATION:              9974663
                                                      DATE:             09-17-99
<PAGE>




                                                       STATE OF DELAWARE
                                                      SECRETARY OF STATE
                                                DIVISION OF CORPORATIONS
                                               FILED 09:01 AM 09/13/1999
                                                     991380864 - 2645754

                              CERTIFICATE OF MERGER

                                       OF

                                 TEKTAGEN, INC.

                                      INTO

                        CHARLES RIVER LABORATORIES, INC.

   (Under Section 251 of the General Corporation Law of the State of Delaware)

         Charles River Laboratories, Inc., a Delaware corporation, does hereby
certify:

         FIRST: The name and state of incorporation of each of the constituent
corporations of the merger is as follows:

         (a)      Tektagen, Inc., a Delaware corporation; and

         (b)      Charles River Laboratories, Inc., a Delaware corporation.

         SECOND: An Agreement and Plan of merger has been approved, adopted,
certified, executed and acknowledged by Tektagen, Inc. and Charles River
Laboratories, Inc. in accordance with the provisions of subsection (c) of
Section 251 of the General Corporation Law of the State of Delaware.

         THIRD: The name of the surviving corporation is Charles River
Laboratories, Inc.

         FOURTH: That the Certificate of Incorporation of Charles River
Laboratories, Inc. a Delaware corporation, which is the surviving corporation,
shall continue without amendments or changes.

         FIFTH: The surviving corporation is a corporation of the State of
Delaware.

         SIXTH: The executed Agreement and Plan of Merger is on file at the
principal place of business of Charles River Laboratories, Inc. at 1013 Centre
Road, City of Wilmington, County of Delaware.

         SEVENTH: a copy of the Agreement and Plan of Merger will be furnished
by Charles River Laboratories, Inc., on request and without cost, to any
stockholder of any constituent corporation.

         EIGHTH: Tektagen, Inc. has authority to issue a single class of stock
composed of 3,000 common shares, $.01 par value per share.

         IN WITNESS WHEREOF, Charles River Laboratories, Inc. has caused this
Certificate to be signed by its Vice President this 10th day of September, 1999.

                        CHARLES RIVER LABORATORIES, INC.

                                    By:   /s/  Robert B. Stiles
                                    ---------------------------
                                    Name:   Robert B. Stiles
                                    Title:  Vice President

<PAGE>



                                STATE OF DELAWARE

                        OFFICE OF THE SECRETARY OF STATE

                 -----------------------------------------------


         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
MERGER, WHICH MERGES:

         "THERION CORPORATION", A NEW YORK CORPORATION,

         WITH AND INTO "CHARLES RIVER LABORATORIES, INC." UNDER THE NAME OF
"CHARLES RIVER LABORATORIES, INC.", A CORPORATION ORGANIZED AND EXISTING UNDER
THE LAWS OF THE STATE OF DELAWARE, AS RECEIVED AND FILED IN THIS OFFICE THE
THIRTEENTH DAY OF SEPTEMBER, A.D. 1999, AT 9 O'CLOCK A.M.

                                            /s/ Edward J. Freel
                                            -----------------------------------
                                            Edward J. Freel, Secretary of State

                                                       AUTHENTICATION: 9974662
                                                       DATE: 09-17-99
<PAGE>


                                                         STATE OF DELAWARE
                                                        SECRETARY OF STATE
                                                  DIVISION OF CORPORATIONS
                                                 FILED 09:00 AM 09/13/1999
                                                       991380864 - 2645754

                              CERTIFICATE OF MERGER

                                       OF

                               THERION CORPORATION

                                      INTO

                        CHARLES RIVER LABORATORIES, INC.

   (Under Section 251 of the General Corporation Law of the State of Delaware)

         The undersigned, for the purpose of merging a foreign corporation with
and into a domestic corporation under the General Corporation Law of the State
of Delaware, does hereby certify that:

         FIRST: The name and state of incorporation of each of the constituent
corporations of the merger is as follows:

         (a)      Therion Corporation, a New York corporation; and

         (b)      Charles River Laboratories, Inc., a Delaware corporation.

         SECOND: An Agreement and Plan of Merger has been approved, adopted,
certified, executed and acknowledged by each of the constituent corporations in
accordance with the requirements of Section 252 of the General Corporation Law
of the State of Delaware.

         THIRD: The name of the surviving corporation is Charles River
Laboratories, Inc.

         FOURTH: The Certificate of Incorporation of Charles River Laboratories,
Inc. shall be the Certificate of Incorporation of the surviving corporation,
with no amendments or changes.

         FIFTH: The executed Agreement and Plan of Merger is on file at the
principal place of business of the surviving corporation, the address of which
is 1013 Centre Road, City of Wilmington, County of Delaware.

         SIXTH: A copy of the executed Agreement and Plan of Merger will be
furnished by the surviving corporation, on request and without cost, to any
stockholder of either of the constituent corporations.

         SEVENTH: The terminating corporation has authority to issue a single
class of common stock composed of 2,000 shares of common stock, no par value per
share.

         IN WITNESS WHEREOF, Charles River Laboratories, Inc. has caused this
Certificate to be signed by its Vice President this 10th day of September, 1999.

                                            CHARLES RIVER LABORATORIES, INC.

                                            By:   /s/ Robert B. Stiles
                                            ------------------------------------
                                            Name:  Robert B. Stiles
                                            Title: Vice President
<PAGE>



                                STATE OF DELAWARE

                        OFFICE OF THE SECRETARY OF STATE

         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
AMENDMENT OF "CRL HOLDINGS, INC.", CHANGING ITS NAME FROM "CRL HOLDINGS, INC."
TO "CHARLES RIVER LABORATORIES, INC.", FILED IN THIS OFFICE ON THE THIRTY-FIRST
DAY OF AUGUST, A.D. 1999, AT 9 O'CLOCK A.M.

         A FILED COPY OF THIS CERTIFICATE HAS BEEN FORWARDED TO THE NEW CASTLE
COUNTY RECORDER OF DEEDS.

                                           /s/ Edward J. Freel
                                           ------------------------------------
                                           Edward J. Freel, Secretary of State

                                                     AUTHENTICATION:   9949876
                                                               DATE:   08-31-99




<PAGE>



                                                          STATE OF DELAWARE
                                                         SECRETARY OF STATE
                                                   DIVISION OF CORPORATIONS
                                                  FILED 09:00 AM 08/31/1999
                                                          991364079-2645754

                            CERTIFICATE OF AMENDMENT
                                       TO
                          CERTIFICATE OF INCORPORATION
                                       OF
                               CRL HOLDINGS, INC.

         CRL Holdings, Inc. (the "Corporation"), a corporation organized and
existing under and by virtue of the General Corporation Law of the State of
Delaware,

         DOES HEREBY CERTIFY:

         FIRST: That the Board of Directors of the Corporation, by the unanimous
written consent of its members, filed with the minutes of the Board, adopted a
resolution proposing and declaring advisable the following amendment to the
Certificate of Incorporation of the Corporation:

                  RESOLVED: That the Certificate of Incorporation of Charles
         River Laboratories, Inc. be amended by changing Article 1 thereof so
         that, as amended, said Article shall be and read as follows:

         1.  The name of the Corporation is Charles River Laboratories, Inc.

         SECOND: That in lieu of a meeting and vote of the stockholders, the
stockholders have given written consent to said amendment in accordance with the
provisions of Sections 228 and 242 of the General Corporation Law of the State
of Delaware.

         IN WITNESS WHEREOF, CRL Holdings, Inc. has caused this certificate
to be signed by Alan H. Resnick, its Treasurer, this 31st day of August, 1999.

                                                   CRL Holdings, Inc.

                                                   By  /s/ Alan H. Resnick
                                                     ---------------------------
                                                      Alan H. Resnick
                                                      Treasurer
<PAGE>



                                State of Delaware

                        Office of the Secretary of State

                       -----------------------------------


         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
AMENDMENT OF "CHARLES RIVER BRF, INC.", CHANGING ITS NAME FROM "CHARLES RIVER
BRF, INC." TO "CRL HOLDINGS, INC.", FILED IN THIS OFFICE OF THE NINTH DAY OF
JULY, A.D. 1999, AT 9 O'CLOCK A.M.

                                                   /s/ Edward J. Freel
                                            -----------------------------------
                                            Edward J. Freel, Secretary of State

                                               AUTHENTICATION:  9974660
                                                         DATE: 09-17-99
<PAGE>



                                                              STATE OF DELAWARE
                                                             SECRETARY OF STATE
                                                       DIVISION OF CORPORATIONS
                                                      FILED 09:00 AM 08/31/1999
                                                            991280620 - 2645754

                            CERTIFICATE OF AMENDMENT
                                       OF
                          CERTIFICATE OF INCORPORATION
                                       OF
                             CHARLES RIVER BRF, INC.

                     (Pursuant to Section 242 of the General
                    Corporation Law of the State of Delaware)

         Charles River BRF, Inc., a corporation organized and existing under the
General Corporation Law of the State of Delaware (the "Corporation"), does
hereby certify that:

         1.       The name of the Corporation is Charles River BRF, Inc.

         2. The name of the Corporation is hereby changed to "CRL Holdings,
Inc."

         3. Each of the 100 issued and outstanding shares of the Corporation's
Common Stock, par value $.01 per share, are hereby changed into 300 shares of
Common Stock, par value $.01 par share, so that immediately after affecting such
change, the Corporation shall have a total of 30,000 shares of Common Stock, par
value $.01 per share, issued and outstanding.

         4. Article 4 of the Certificate of Incorporation of the Corporation is
hereby amended to read in its entirety as follows:

         "4. The Corporation is authorized to issue two (2) classes of shares to
be designated, respectively, Common Stock ("Common Stock") and Preferred Stock
("Preferred Stock"). The total number of shares of stock that the Corporation
shall be authorized to issue is Five Hundred Thousand (500,000). The total
number of shares of Common Stock that the Corporation shall be authorized to
issue is Two Hundred Fifty Thousand (250,000) shares of Common Stock with a par
value of $.01 per share. The total number of shares of Preferred Stock that the
Corporation shall be authorized to issue is Two Hundred Fifty Thousand (250,000)
shares of Series A Redeemable Preferred Stock with a par value of $.01 per
share.

         The rights, preferences and limitations granted to and imposed on the
authorized stock are as set forth below in this Article 4:

         A. Common Stock: The Common Stock shall have the rights, preferences
and limitations granted to and imposed upon the Common Stock as are set forth in
the following sections.


<PAGE>



         Section 1. Dividend Rights. After payment in full of any dividends the
accrued with respect to the Preferred Stock, dividends payable in cash, stock or
otherwise, as may be declared by the Board of Directors, may be declared and
paid on the Common Stock from time to time out of any funds lawfully available
therefor.

         Section 2. Voting Rights. The holders of the Common Stock shall be
entitled to one (1) vote per share.

         Section 3. Liquidation, Dissolution or Winding Up. In the event of any
liquidation, dissolution or winding up of the Corporation, whether voluntary or
involuntary and after payment in full of the amount payable in respect of the
Preferred Stock, as provided in Paragraph B, Section 1(b) below, the holders of
the shares of Common Stock shall share ratably in the distribution of the
Residual Assets as defined in Paragraph B, Section 1(b) below.

         B. Preferred Stock. The Preferred Stock shall consist of Two Hundred
Fifty Thousand (250,000) shares having a par value of $.01 per share and shall
be designated as "Series A Redeemable Preferred Stock" (the "Series A Preferred
Stock"). The rights, preferences and limitations granted to and imposed on the
Preferred Stock are as set forth in the following sections:

         Section 1. Rights, Preferences and Limitations of Series A Preferred
Stock.

         (a) Dividends. The holders of the Series A Preferred Stock, in
preference to the holders of all Common Stock, shall be entitled to receive
when, as and if declared by the Board of Directors out of funds legally
available for the purpose, cumulative dividends as provided in this Paragraph.
Dividends on each share of Series A Preferred Stock shall be payable in cash,
and shall accrue at the Dividend Rate on the sum of (i) the Purchase Price and
(ii) all accumulated and unpaid dividends accrued thereon pursuant to this
Paragraph from the date of issuance thereof (the "Series A Dividends"); the sum
of the Purchase Price and the Series A Dividends is referred to herein as the
"Series A Preference Amount." Such dividends will be calculated and compounded
annually in arrears on December 31 of each year (each a "Dividend Date") in
respect of the prior twelve month period, prorated on a daily basis for partial
periods. Such dividends shall commence to accrue on each share of Series A
Preferred Stock from the date of issuance thereof whether or not declared by the
Board of Directors, and whether or not there are profits, surplus or other funds
of the Corporation legally available for the payment of dividends, and shall
continue to accrue thereon until the Series A Preference Amount is paid in full
in cash.

         (b) Liquidation, Dissolution or Winding Up. In the event of any
liquidation, dissolution or winding up of the Corporation, whether voluntary or
involuntary, subject to the rights of holders of other series of preferred stock
of the Corporation, each holder of outstanding shares of Series A Preferred
Stock and Common Stock shall be entitled to be paid out of the assets of the
Corporation available for distribute to stockholders, whether such assets are
capital, surplus, or earnings as follows: (i) first, the holders of the
outstanding shares of Series A Preferred Stock shall receive an amount in cash
equal to the Purchase Price together with any accrued but unpaid dividends to
which the holders of outstanding shares of such series are entitled pursuant to
Section 1(a) hereof (the "Series A Liquidation Preference") before any payment
shall be made to the holders of any Common Stock or of any other series of
preferred stock of the Corporation; and (ii) second, the holders of the
outstanding shares of Common Stock shall share ratably in the distribution of
the assets of the Corporation remaining for distribution to stockholders,
whether such assets are capital, surplus, or earnings (the "Residual Assets").


<PAGE>



         (c) Voting Rights. The holders of Series A Preferred Stock shall not be
entitled to vote except as required by law.

         (d) Conversion. The Series A Preferred Stock shall not be convertible
into Common Stock or any other security of the Corporation.

         (e) Redemption Rights.

                  (i) Redemption Rights of the Holder. At any time or from time
to time after the issuance of any shares of Series A Preferred Stock and prior
to the completion of a Public Offering, any holder of such shares shall have the
right to cause the Corporation to redeem its shares by notifying the Corporation
in writing of its intent to exercise the rights afforded by this Paragraph and
specifying a date not less than two (2) days (or such shorter period as may be
determined by mutual agreement of the holder and the Corporation) nor more than
thirty (30) days from the date of such notice on which the shares designated
therein shall be redeemed (the "Optional Redemption Date"). The Corporation
shall redeem on the Optional Redemption Date all shares of Series A Preferred
Stock which have been tendered for redemption in accordance with the foregoing,
together with stock powers duly endorsed for transfer to the Corporation.

                  (ii) Redemption Rights of the Corporation. Subject to
compliance with applicable law, at any time or from time to time the Corporation
shall have the right to redeem any or all of the then outstanding shares of
Series A Preferred Stock. The Corporation shall notify the holders of Series A
Preferred Stock of its intent to exercise the rights afforded by this Paragraph
and specify a date not less than two (2) days (or such shorter period as may be
determined by mutual agreement of the holder and the Corporation) nor more than
thirty (30) days from the date of such notice on which the shares designated
therein shall be redeemed (the "Mandatory Redemption Date"). The recipient of
such notice shall tender to the Corporation the shares of Series A Preferred
Stock specified therein on or before such date, together with stock powers duly
endorsed for transfer to the Corporation.

                  (iii) Payment of Redemption Price. The total amount payable to
a holder of Series A Preferred Stock upon redemption of the shares hereunder
shall be the Series A Preference Amount of such shares (the "Redemption Price").
The Redemption Price shall be paid in cash by wire transfer of immediately
available funds on the Optional Redemption Date or the Mandatory Redemption
Date, as applicable.

                  (iv) Statutory Limitations. If the Corporation does not have
sufficient funds legally available to redeem all shares for which redemption is
requested hereunder, then it shall redeem such shares on a pro rata basis among
the holders of the Series A Preferred Stock which requested redemption in
proportion to the shares of Series A Preferred Stock then held by them to the
extent possible and shall redeem the remaining shares to be redeemed as soon as
sufficient funds are legally available therefor.

         (f) No Reissuance of Preferred Stock. No share or shares of Preferred
Stock acquired by the Corporation by reason of redemption, purchase, conversion
or otherwise shall be reissued, and all such shares shall be cancelled. The
Corporation may from time to time take such appropriate corporate action as may
be necessary to reduce the authorized number of shares of Preferred Stock
accordingly.

         (g)      Definitions.



<PAGE>



         "Certificate of Incorporation" shall mean the Certificate of
Incorporation of the Corporation, as amended from time to time.

         "Common Stock" shall mean the Corporation's Common Stock, $.01 par
value per share.

         "Dividend Date" shall have the meaning set forth in Paragraph B(1)(a)
hereof.

         "Dividend Rate" shall mean 7.5% per annum.

         "Person" shall mean an individual, partnership, corporation,
association, trust, joint venture, unincorporated organization and any
government, governmental department or agency or political subdivision thereof.

         "Public Offering" shall mean any underwritten offering by the
Corporation of its equity securities to the public pursuant to an effective
registration statement under the Securities Act of 1933 or any comparable
statement under any similar federal statute then in force, other than an
offering of shares being issued as consideration in a business acquisition or
combination or an offering in connection with an employee benefit plan.

         "Purchase Price" of any share of Series A Preferred Stock shall be
$1,000.

         "Series A Preference Amount" shall have the meaning set forth in
Paragraph B(1)(a).

         "Series A Preferred Stock" shall mean the Corporation's Series A
Redeemable Preferred Stock, $.01 par value.

         5. The Board of Directors of the Corporation, by unanimous written
consent in lieu of a meeting pursuant to Section 141(f) of the General
Corporation Law of the State of Delaware, duly adopted resolutions declaring
advisable this Certificate of Amendment.

         6. In lieu of a meeting and vote of stockholders, the stockholders have
approved this Certificate of Amendment by written consent in accordance with the
provisions of Section 228 of the General Corporation Law of the State of
Delaware and the By-laws of the Corporation, and notice of the taking of such
action was duly given to stockholders not consenting in writing to such action.

         7. This Certificate of Amendment was duly adopted in accordance with
Sections 242 of the General Corporation Law of the State of Delaware.

         IN WITNESS WHEREOF, CHARLES RIVER BRF, Inc. has caused this Certificate
of Amendment to be signed by Alan H. Resnick, its Treasurer, this 9th day of
July, 1999.

                                            CHARLES RIVER BRF, INC.

                                            By: /s/ Alan H. Resnick
                                            --------------------------
                                            Alan H. Resnick, Treasurer
<PAGE>



                                State of Delaware

                        Office of the Secretary of State

                      ------------------------------------


         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
RENEWAL OF "CHARLES RIVER BRF, INC.", FILED IN THIS OFFICE ON THE NINTH DAY OF
JULY, A.D. 1999, AT 9 O'CLOCK A.M.

                                             /s/ Edward J. Freel
                                             -----------------------------------

                                             Edward J. Freel, Secretary of State

                                                    AUTHENTICATION: 9974659
                                                             DATE: 09-17-99

<PAGE>

                                                               STATE OF DELAWARE
                                                              SECRETARY OF STATE
                                                        DIVISION OF CORPORATIONS
                                                       FILED 09:00 AM 07/09/1999
                                                             991280618 - 2645754

                             CERTIFICATE OF REVIVAL
                                       OF
                          CERTIFICATE OF INCORPORATION
                                       OF
                            CHARLES RIVER BRF, INC.

            Under Section 312 of the Delaware General Corporation Law

     1.   The name of the Corporation is Charles River BRF, Inc.

     2.   The address of the Corporation's registered office in the State of
Delaware is: Corporation Service Company, 1013 Centre Road, Wilmington,
Delaware 19805.  County of New Castle.

     3.   The date of filing of the original certificate of incorporation was
July 25, 1996.

     4.   The date when restoration, renewal, and revival of the charter of
this Corporation is to commence is the 28th day of February, 1999, same being
prior to the date of the expiration of the charter.  This renewal and revival
of the charter of this Corporation is to be perpetual.

     5.   Charles River BRF, Inc., desiring to be revived, was incorporated
under the laws of the State of Delaware.

     6.   This certificate of incorporation was voided on March 1, 1999 for
failure to pay taxes in the State of Delaware.

     7.   This Certificate of Revival was authorized by the directors of the
Corporation who were in office at the time the Certificate of Incorporation was
voided and who are now the directors of the Corporation.

     IN WITNESS WHEREOF, I the undersigned do make, file and record this
Certificate of Revival and do certify that the facts herein stated are true and
I have accordingly hereunto set my hand this 9th day of July, 1999

                                             By: /s/ Alan H. Resnick
                                                 ------------------------------
                                                 Alan H. Resnick, Treasurer

<PAGE>



                                State of Delaware

                        Office of the Secretary of State                  PAGE 1

              -----------------------------------------------------




         I, EDWARD, J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
INCORPORATION OF "CHARLES RIVER BRF, INC.,", FILED IN THIS OFFICE ON THE
TWENTY-FIFTH DAY OF JULY, A.D. 1996, AT 9 O'CLOCK A.M.

                                             /s/ Edward J. Freel
                                            ------------------------------------
                                            Edward J. Freel, Secretary of State

                                                AUTHENTICATION:         9969327
                                                          DATE:        09-14-99
<PAGE>




                          CERTIFICATE OF INCORPORATION

                                       of

                             CHARLES RIVER BRF, INC.

         1. The name of this corporation is Charles River BRF, Inc.

         2. The registered office of this corporation in the State of Delaware
is located at 1013 Centre Road, in the City of Wilmington, County of New Castle.
The name of its registered agent at such address is Corporation Service Company.

         3. The purpose of this corporation is to engage in any, lawful act or
activity for which corporations may be organized under the General Corporation
Law of the State of Delaware.

         4. The total number of shares of stock that this corporation shall have
authority to issue is 3,000 shares of Common Stock, $.01 par value per share.

Each share of Common Stock shall be entitled to one vote.

         5. The name and mailing address of the incorporator is: Patrick
O'Brien, Ropes & Gray, One International Place, Boston, Massachusetts 02110.

         6. Except as otherwise provided in the provisions establishing a class
of stock, the number of authorized shares of any class of stock may be increased
or decreased (but not below the number of shares thereof then outstanding) by
the affirmative vote of the holders of a majority of the voting power of the
corporation entitled to vote irrespective of the provisions of Section 242(b)(2)
of the General Corporation Law of the State of Delaware.

         7. The election of directors need not be by written ballot unless the
by-laws shall so require.

         8. In furthance and not in limitation of the power conferred upon the
board of directors by law, the board of directors shall have power to make,
adopt, alter, amend and repeal from time to time by-laws of this corporation,
subject to the right of the stockholders entitled to vote with respect thereto
to alter and repeal by-laws made by the board of directors.

         9. A director of this corporation shall not be liable to the
corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director, except to the extent that exculpation from liability is not
permitted under the


<PAGE>



General Corporation Law of the State of Delaware as in effect at the time such
liability is determined. No amendment or repeal of this paragraph 9 shall apply
to or have any effect on the liability or alleged liability of any director of
the corporation for or with respect to any acts or omissions of such director
occurring prior to such amendment or repeal.

         10. This corporation shall, to the maximum extent permitted from time
to time under the law of the State of Delaware, indemnify and upon request
advance expenses to any person who is or was a party or is threatened to be made
a party to any threatened, pending or completed action, suit, proceeding or
claim, whether civil, criminal, administrative or investigative, by reason of
the fact that such person is or was or has agreed to be a director or officer of
this corporation or while a director or officer is or was serving at the request
of this corporation as a director, officer, partner, trustee, employee or agent
of any corporation, partnership, joint venture, trust or other enterprise,
including service with respect to employee benefit plans, against expenses
(including attorney's fees and expenses), judgments, fines, penalties and
amounts paid in settlement incurred (and not otherwise recovered) in connection
with the investigation, preparation to defend or defense of such action, suit,
proceeding or claim; provided, however, that the foregoing shall not require
this corporation to indemnify or advance expenses to any person in connection
with any action, suit, proceeding, claim or counterclaim initiated by or on
behalf of such person. Such indemnification shall not be exclusive of other
indemnification rights arising under any by-law, agreement, vote of directors or
stockholders or otherwise and shall inure to the benefit of the heirs and legal
representatives of such person. Any person seeking indemnification under this
paragraph 10 shall be deemed to have met the standard of conduct required for
such indemnification unless the contrary shall be established. Any repeal or
modification of the foregoing provisions of this paragraph 10 shall not
adversely affect any right or protection of a director or officer of this
corporation with respect to any acts or omissions of such director or officer
occurring prior to such repeal or modification.

         11. The books of this corporation may (subject to any statutory
requirements) be kept outside the State of Delaware as may be designated by the
board of directors or in the by-laws of this corporation.

         12. If at any time this corporation shall have a class of stock
registered pursuant to the provisions of the Securities Exchange Act of 1934,
for so long as such class is so registered, any action by the stockholders of
such class must be taken at an annual or special meeting of stockholders and may
not be taken by written consent.


<PAGE>



         THE UNDERSIGNED, the sole incorporator named above, hereby certifies
that the facts stated above are true as of this 23rd day of July, 1996.

                                       /s/ Patrick O'Brien
                                   ---------------------------------------------
                                           Patrick O'Brien
                                           Sole Incorporator




                                     BY-LAWS

                                       OF

                             CHARLES RIVER BRF, INC.

         SECTION 1.  Law, Certificate of Incorporation and By-laws.

         These by-laws are subject to the certificate of incorporation of the
corporation. In these by-laws, references to law, the certificate of
incorporation and by-laws mean the law, the provisions of the certificate of
incorporation and the by-laws as from time to time in effect.

         SECTION 2.  Stockholders.

          (a) Annual Meeting. The annual meeting of stockholders shall be held
at 10:00 a.m. on the second Tuesday in May in each year, unless that day be a
legal holiday at the place where the meeting is to be held, in which case the
meeting shall be held at the same hour on the next succeeding day not a legal
holiday, or at such other date and time as shall be designated from time to time
by the board of directors and stated in the notice of the meeting, at which they
shall elect a board of directors and transact such other business as may be
required by law or these by-laws or as may properly come before the meeting.

          (b) Special Meetings. A special meeting of the stockholders may be
called at any time by the chairman of the board, if any, the president or the
board of directors. A special meeting of the stockholders shall be called by the
secretary, or in the case of the death, absence, incapacity or refusal of the
secretary, by an assistant secretary or some other officer, upon application of
a majority of the directors. Any such application shall state the purpose or
purposes of the proposed meeting. Any such call shall state the place, date,
hour, and purposes of the meeting.

          (c) Place of Meeting. All meetings of the stockholders for the
election of directors or for any other purpose shall be held at such place
within or without the State of Delaware as may be determined from time to time
by the chairman of the board, if any, the president or the board of directors.
Any adjourned session of any meeting of the stockholders shall be held at the
place designated in the vote of adjournment.

          (d) Notice of Meetings. Except as otherwise provided by law, a written
notice of each meeting of stockholders stating the place, day and hour thereof
and, in the case of a special meeting, the purposes for which the meeting is
called, shall


<PAGE>



be given not less then ten nor more than sixty days before the meeting, to each
stockholder entitled to vote thereat, and to each stockholder who, by law, by
the certificate of incorporation or by these by-laws, is entitled to notice, by
leaving such notice with him or at his residence or usual place business, or by
depositing it in the United States mail, postage prepaid, and addressed to such
stockholder at his address as it appears in the records of the corporation. Such
notice shall be given by the secretary, or by an officer or person designated by
the board of directors, or in the case of a special meeting by the officer
calling the meeting. As to any adjourned session of any meeting of stockholders,
notice of the adjourned meeting need not be given if the time and place thereof
are announced at the meeting at which the adjournment was taken except that if
the adjournment is for more than thirty days or if after the adjournment a new
record date is set for the adjourned session, notice of any such adjourned
session of the meeting shall be given in the manner heretofore described. No
notice of any meeting of stockholders or any adjourned session thereof need be
given to a stockholder if a written waiver of notice, executed before or after
the meeting or such adjourned session by such stockholder, is filed with the
records of the meeting or if the stockholder attends such meeting without
objecting at the beginning of the meeting to the transaction of any business
because the meeting is not lawfully called or convened. Neither the business to
be transacted at, nor the purpose of, any meeting of the stockholders or any
adjourned session thereof need be specified in any written waiver of notice.

          (e) Quorum of Stockholders. At any meeting of the stockholders a
quorum as to any matter shall consist of a majority of the votes entitled to be
cast on the matter, except where a larger quorum is required by law, by the
certificate of incorporation or by these bylaws. Any meeting may be adjourned
from time to time by a majority of the votes properly cast upon the question,
whether or not a quorum is present. If a quorom is present at an original
meeting, a quorum need not be present at an adjourned session of that meeting.
Shares of its own stock belonging to the corporation or to another corporation,
if a majority of the shares entitled to vote in the election of directors of
such other corporation is held, directly or indirectly, by the corporation,
shall neither be entitled to vote nor be counted for quorom purposes; provided,
however, that the foregoing shall not limit the right of any corporation to vote
stock, including but not limited to its own stock, held by it in a fiduciary
capacity.

          (f) Action by Vote. When a quorum is present at any meeting, a
plurality of the votes properly cast for election to any office shall elect to
such office and a majority of the votes properly cast upon any question other
than an election to an office shall decide the question, except when a larger
vote is required by law, by the certificate of incorporation or by these
by-laws. No ballot



                                        2


<PAGE>



shall be required for any election unless requested by a stockholder present or
represented at the meeting and entitled to vote in the election.

          (g) Action without Meetings. Unless otherwise provided in the
certificate of incorporation, any action required or permitted to be taken by
stockholders for or in connection with any corporate action may be taken without
a meeting, without prior notice and without a vote, if a consent or consents in
writing, setting forth the action so taken, shall be signed by the holders of
outstanding stock having not less am the minimum number of votes that would be
necessary to authorize or take such action at a meeting at which all shares
entitled to vote thereon were present and voted and shall be delivered to the
corporation by delivery to its registered office in Delaware by band or
certified or registered mail, return receipt requested, to its principal place
of business or to an officer or agent of the corporation having custody of the
book in which proceedings of meetings of stockholders are recorded. Each such
written consent shall bear the date of signature of each stockholder who signs
the consent. No written consent shall be effective to take the corporate action
referred to therein unless written consents signed by a number of stockholders
sufficient to take such action are delivered to the corporation in the manner
specified in this paragraph within sixty days of the earliest dated consent so
delivered.

         If action is taken by consent of stockholders and in accordance with
the foregoing, there shall be filed with the records of the meetings of
stockholders the writing or writings comprising such consent.

         If action is taken by less than unanimous consent of stockholders,
prompt notice of the taking of such action without a meeting shall be given to
those who have not consented in writing and a certificate signed and attested to
by the secretary that such notice was given shall be filed with the records of
the meetings of stockholders.

         In the event that the action which is consented to is such as would
have required the filing of a certificate under any provision of the General
Corporation Law of the State of Delaware, if such action had been voted upon by
the stockholders at a meeting thereof, the certificate filed under such
provision shall state, in lieu of any statement required by such provision
concerning a vote of stockholders, that written consent has been given under
Section 228 of said General Corporation Law and that written notice has been
given as provided in such Section 228.

          (h) Proxy Representation. Every stockholder may authorize another
person or persons to act for him by proxy in all matters in which a stockholder
is entitled to participate, whether by waiving notice of any meeting, objecting
to or



                                        3


<PAGE>



voting or participating at a meeting, or expressing consent or dissent without a
meeting. Every proxy must be signed by the stockholder or by his
attorney-in-fact. No proxy shall be voted or acted upon after three years from
its date unless such proxy provides for a longer period. A duly executed proxy
shall be irrevocable if it states that it is irrevocable and, if, and only as
long as, it is coupled with an interest sufficient in law to support an
irrevocable power. A proxy may be made irrevocable regardless of whether the
interest with which it is coupled is an interest in the stock itself or an
interest in the corporation generally. The authorization of a proxy may but need
not be limited to specified action, provided, however, that if a proxy limits
its authorization to a meeting or meetings of stockholders, unless otherwise
specifically provided such proxy shall entitle the holder thereof to vote at any
adjourned session but shall not be valid after the final adjournment thereof.

          (i) Inspectors. The directors or the person presiding at the meeting
may, and shall if required by applicable law, appoint one or more inspectors of
election and any substitute inspectors to act at the meeting or any adjournment
thereof. Each inspector, before entering upon the discharge of his duties, shall
take and sign an oath faithfully to execute the duties of inspector at such
meeting with strict impartiality and according to the best of his ability. The
inspectors, if any, shall determine the number of shares of stock outstanding
and the voting power of each, the shares of stock represented at the meeting,
the existence of a quorum, the validity and effect of proxies, and shall receive
votes, ballots or consents, hear and determine all challenges and questions
arising in connection with the right to vote, count and tabulate all votes,
ballots or consents, determine the result, and do such acts as are proper to
conduct the election or vote with fairness to all stockholders. On request of
the person presiding at the meeting, the inspectors shall make a report in
writing of any challenge, question or matter determined by them and execute a
certificate of any fact found by them.

          (j) List of Stockholders. The secretary shall prepare and make, at
least ten days before every meeting of stockholders, a complete list of the
stockholders entitled to vote at such meeting, arranged in alphabetical order
and showing the address of each stockholder and the number of shares registered
in his name. The stock ledger shall be the only evidence as to who are
stockholders entitled to examine such list or to vote in person or by proxy at
such meeting.

         SECTION 3.  Board of Directors.

          (a) Number. The corporation shall have one or more directors, the
number of directors to be determined from time to time by vote of a majority of
the directors then in office. Except in connection with the election of
directors at the annual meeting of stockholders, the number of directors may be
decreased



                                        4


<PAGE>



only to eliminate vacancies by reason of death, resignation or removal of one or
more directors. No director need be a stockholder.

          (b) Tenure. Each director shall hold office until the next annual
meeting and until his successor is elected and qualified, or until he sooner
dies, resigns, is removed or becomes disqualified.

          (c) Powers. The business and affairs of the corporation shall be
managed by or under the direction of the board of directors who shall have and
may exercise all the powers of the corporation and do all such lawful acts and
things as are not by law, the certificate of incorporation or these by-laws
directed or required to be exercised or done by the stockholders.

          (d) Vacancies. Vacancies and any newly created directorships resulting
from any increase in the number of directors may be filled by vote of the
holders of the particular class or series of stock entitled to elect such
director at a meeting called for the purpose, or by a majority of the directors
then in office, although less than a quorum, or by a sole remaining director, in
each case elected by the particular class or series of stock entitled to elect
such directors. When one or more directors shall resign from the board,
effective at a future date, a majority of the directors then in office,
including those who have resigned, who were elected by the particular class or
series of stock entitled to elect such resigning director or directors shall
have power to fill such vacancy or vacancies, the vote or action by writing
thereon to take effect when such resignation or resignations shall become
effective. The directors shall have and may exercise all their powers
notwithstanding the existence of one or more vacancies in their number, subject
to any requirements of law or of the certificate of incorporation or of these
by-laws as to the number of directors required for a quorum or for any vote or
other actions.

          (e) Committees. The board of directors may, by vote of a majority of
the whole board, (a) designate, change the membership of or terminate the
existence of any committee or committees, each committee to consist of one or
more of the directors; (b) designate one or more directors as alternate members
of any such committee who may replace any absent or disqualified member at any
meeting of the committee; and (c) determine the extent to which each such
committee shall have and may exercise the powers of the board of directors in
the management of the business and affairs of the corporation, including the
power to authorize the seal of the corporation to be affixed to all papers which
require it and the power and authority to declare dividends or to authorize the
issuance of stock; excepting, however, such powers which by law, by the
certificate of incorporation or by these by-laws they are prohibited from so
delegating. In the absence or disqualification of any member of such committee
and his alternate, if



                                        5


<PAGE>



any, the member or members thereof present at any meeting and not disqualified
from voting, whether or not constituting a quorum, may unanimously appoint
another member of the board of directors to act at the meeting in the place of
any such absent or disqualified member. Except as the board of directors may
otherwise determine, any committee may make rules for the conduct of its
business, but unless otherwise provided by the board or such rules, its business
shall be conducted as nearly as may be in the same manner as is provided by
these by-laws for the conduct of business by the board of directors. Each
committee shall keep regular minutes of its meetings and report the same to the
board of directors upon request.

          (f) Regular Meetings. Regular meetings of the board of directors may
be held without call or notice at such places within or without the State of
Delaware and at such times as the board may from time to time determine,
provided that notice of the first regular meeting following any such
determination shall be given to absent directors. A regular meeting of the
directors may be held without call or notice immediately after and at the same
place as the annual meeting of stockholders.

          (g) Special Meetings. Special meetings of the board of directors may
be held at any time and at any place within or without the State of Delaware
designated in the notice of the meeting, when called by the chairman of the
board, if any, the president, or by one-third or more in number of the
directors, reasonable notice thereof being given to each director by the
secretary or by the chairman of the board, if any, the president or any one of
the directors calling the meeting.

          (h) Notice. It shall be reasonable and sufficient notice to a director
to send notice by mail at least forty-eight hours or by telegram at least
twenty-four hours before the meeting addressed to him at his usual or last known
business or residence address or to give notice to him in person or by telephone
at least twenty-four hours before the meeting. Notice of a meeting need not be
given to any director if a written waiver of notice, executed by him before or
after the meeting, is filed with the records of the meeting, or to any director
who attends the meeting without protesting prior thereto or at its commencement
the lack of notice to him. Neither notice of a meeting nor a waiver of a notice
need specify the purposes of the meeting.

          (i) Quorum. Except as may be otherwise provided by law, by the
certificate of incorporation or by these by-laws, at any meeting of the
directors a majority of the directors then in office shall constitute a quorum;
a quorum shall not in any case be less than one-third of the total number of
directors constituting the whole board. Any meeting may be adjourned from time
to time by a majority



                                        6


<PAGE>



of the votes cast upon the question, whether or not a quorum is present, and the
meeting may be held as adjourned without further notice.

          (j) Action by Vote. Except as may be otherwise provided by law, by the
certificate of incorporation or by these by-laws, when a quorum is present at
any meeting the vote of a majority of the directors present shall be the act of
the board of directors.

          (k) Action Without a Meeting. Any action required or permitted to be
taken at any meeting of the board of directors or a committee thereof may be
taken without a meeting if all the members of the board or of such committee, as
the case may be, consent thereto in writing, and such writing or writings are
filed with the records of the meetings of the board or of such committee. Such
consent shall be treated for all purposes as the act of the board or of such
committee, as the case may be.

          (l) Participation in Meetings by Conference Telephone. Members of the
board of directors, or any committee designated by such board, may participate
in a meeting of such board or committee by means of conference telephone or
similar communications equipment by means of which all persons participating in
the meeting can hear each other or by any other means permitted by law. Such
participation shall constitute presence in person at such meeting.

          (m) Compensation. In the discretion of the board of directors, each
director may be paid such fees for his services as director and be reimbursed
for his reasonable expenses incurred in the performance of his duties as
director as the board of directors from time to time may determine. Nothing
contained in this section shall be construed to preclude any director from
serving the corporation in any other capacity and receiving reasonable
compensation therefor.

          (n)   Interested Directors and Officers.

          (i) No contract or transaction between the corporation and one or more
         of its directors or officers, or between the corporation and any other
         corporation, partnership, association, or other organization in which
         one or more of the corporation's directors or officers are directors or
         officers, or have a financial interest, shall be void or voidable
         solely for this reason, or solely because the director or officer is
         present at or participates in the meeting of the board or committee
         thereof which authorizes the contract or transaction, or solely because
         his or their votes are counted for such purpose, if.



                                        7


<PAGE>



                       (A) The material facts as to his relationship or interest
                  and as to the contract or transaction are disclosed or are
                  known to the board of directors or the committee, and the
                  board or committee in good faith authorizes the contract or
                  transaction by the affirmative votes of a majority of the
                  disinterested directors, even though the disinterested
                  directors be less than a quorum; or

                       (B) The material facts as to his relationship or interest
                  and as to the contract or transaction are disclosed or are
                  known to the stockholders entitled to vote thereon, and the
                  contract or transaction is specifically approved in good faith
                  by vote of the stockholders; or

                       (C) The contract or transaction is fair as to the
                  corporation as of the time it is authorized, approved or
                  ratified, by the board of directors, a committee thereof, or
                  the stockholders.

         (ii) Common or interested directors may be counted in determining the
         presence of a quorum at a meeting of the board of directors or of a
         committee which authorizes the contract or transaction.

         SECTION 4.  Officers and Agents.

          (a) Enumeration; Qualification. The officers of the corporation shall
be a president, a treasurer, a secretary and such other officers, if any, as the
board of directors from time to time may in its discretion elect or appoint
including without limitation a chairman of the board, one or more vice
presidents and a controller. The corporation may also have such agents, if any,
as the board of directors from time to time may in its discretion choose. Any
officer may be but none need be a director or stockholder. Any two or more
offices may be held by the same person. Any officer may be required by the board
of directors to secure the faithful performance of his duties to the corporation
by giving bond in such amount and with sureties or otherwise as the board of
directors may determine.

          (b) Powers. Subject to law, to the certificate of incorporation and to
the other provisions of these by-laws, each officer shall have, in addition to
the duties and powers herein set forth, such duties and powers as are commonly
incident to his office and such additional duties and powers as the board of
directors may from time to time designate.

          (c) Election. The officers may be elected by the board of directors at
their first meeting following the annual meeting of the stockholders or at any



                                        8


<PAGE>



other time. At any time or from time to time the directors may delegate to any
officer their power to elect or appoint any other officer or any agents.

          (d) Tenure. Each officer shall hold office until the first meeting of
the board of directors following the next annual meeting of the stockholders and
until his respective successor is chosen and qualified unless a shorter period
shall have been specified by the terms of his election or appointment, or in
each case until he sooner dies, resigns, is removed or becomes disqualified.
Each agent shall retain his authority at the pleasure of the directors, or the
officer by whom he was appointed or by the officer who then holds agent
appointive power.

          (e) Chairman of the Board of Directors, President and Vice President.
The chairman of the board, if any, shall have such duties and powers as shall be
designated from time to time by the board of directors. Unless the board of
directors otherwise specifies, the chairman of the board, or if there is none
the chief executive officer, shall preside, or designate the person who shall
preside, at all meetings of the stockholders and of the board of directors.

         Unless the board of directors otherwise specifies, the president shall
be the chief executive officer and shall have direct charge of all business
operations of the corporation and, subject to the control of the directors,
shall have general charge and supervision of the business of the corporation.

         Any vice presidents shall have such duties and powers as shall be set
forth in these bylaws or as shall be designated from time to time by the board
of directors or by the president.

          (f) Treasurer and Assistant Treasurers. Unless the board of directors
otherwise specifies, the treasurer shall be the chief financial officer of the
corporation and shall be in charge of its funds and valuable papers, and shall
have such other duties and powers as may be designated from time to time by the
board of directors or by the president. If no controller is elected, the
treasurer shall, unless the board of directors otherwise specifies, also have
the duties and powers of the controller.

         Any assistant treasurers shall have such duties and powers as shall be
designated from time to time by the board of directors, the president or the
treasurer.

          (g) Controller and Assistant Controllers. If a controller is elected,
he shall, unless the board of directors otherwise specifies, be the chief
accounting officer of the corporation and be in charge of its books of account
and accounting records, and of its accounting Procedures. He shall have such
other duties and



                                        9


<PAGE>



powers as may be designated from time to time by the board of directors, the
president or the treasurer.

         Any assistant controller shall have such duties and powers as shall be
designated from time to time by the board of directors, the president, the
treasurer or the controller.

          (h) Secretary and Assistant Secretaries. The secretary shall record
all proceedings of the stockholders, of the board of directors and of committees
of the board of directors in a book or series of books to be kept therefor and
shall file therein all actions by written consent of stockholders or directors.
In the absence of the secretary from any meeting, an assistant secretary, or if
there be none or he is absent, a temporary secretary chosen at the meeting,
shall record the proceedings thereof. Unless a transfer agent has been appointed
the secretary shall keep or cause to be kept the stock and transfer records of
the corporation, which shall contain the names and record addresses of all
stockholders and the number of shares registered in the name of each
stockholder. He shall have such other duties and powers as may from time to time
be designated by the board of directors or the president.

         Any assistant secretaries shall have such duties and powers as shall be
designated from time to time by the board of directors, the president or the
secretary.

         SECTION 5.  Resignations and Removals.

         Any director or officer may resign at any time by delivering his
resignation in writing to the chairman of the board, if any, the president, or
the secretary or to a meeting of the board of directors. Such resignation shall
be effective upon receipt unless specified to be effective at some other time,
and without in either case the necessity of its being accepted unless the
resignation shall so state. A director (including persons elected by
stockholders or directors to fill vacancies in the board) may be removed from
office with or without cause by the vote of the holders of a majority of the
issued and outstanding shares of the particular class or series entitled to vote
in the election of such director. The board of directors may at any time remove
any officer either with or without cause. The board of directors may at any time
terminate or modify the authority of any agent.

         SECTION 6.  Vacancies.

         If the office of the president or the treasurer or the secretary
becomes vacant, the directors may elect a successor by vote of a majority of the
directors then in office. If the office of any other officer becomes vacant, any
person or



                                       10


<PAGE>



body empowered to elect or appoint that officer may choose a successor. Each
such successor shall hold office for the unexpired term, and in the case of the
president, the treasurer and the secretary until his successor is chosen and
qualified or in each case until he sooner dies, resigns, is removed or become
disqualified. Any vacancy of a directorship shall be filled as specified in
Section 3.4 of these by-laws.

         SECTION 7.  Capital Stock.

          (a) Stock Certificates. Each stockholder shall be entitled to a
certificate stating the number and the class and the designation of the series,
if any, of the shares held by him, in such form as shall, in conformity to law,
the certificate of incorporation and the by-laws, be prescribed from time to
time by the board of directors. Such certificate shall be signed by the chairman
or vice chairman of the board, if any, or the president or a vice president and
by the treasurer or an assistant treasurer or by the secretary or an assistant
secretary. Any of or all the signatures on the certificate may be a facsimile.
In case an officer, transfer agent, or registrar who has signed or whose
facsimile signature has been placed on such certificate shall have ceased to be
such officer, transfer agent, or registrar before such certificate is issued, it
may be issued by the corporation with the same effect as if he were such
officer, transfer agent, or registrar at the time of its issue.

          (b) Loss of Certificates. In the case of the alleged theft, loss,
destruction or mutilation of a certificate of stock, a duplicate certificate may
be issued in place thereof, upon such terms, including receipt of a bond
sufficient to indemnify the corporation against any claim on account thereof, as
the board of directors may prescribe.

         SECTION 8.  Transfer of Shares of Stock.

          (a) Transfer on Books. Subject to the restrictions, if any, stated or
noted on the stock certificate, shares of stock may be transferred on the books
of the corporation by the surrender to the corporation or its transfer agent of
the certificate therefor properly endorsed or accompanied by a written
assignment and power of attorney properly executed, with necessary transfer
stamps affixed, and with such proof of the authenticity of signature as the
board of directors or the transfer agent of the corporation may reasonably
require. Except as may be otherwise required by law, by the certificate of
incorporation or by these by-laws, the corporation shall be entitled to treat
the record holder of stock as shown on its books as the owner of such stock for
all purposes, including the payment of dividends and the right to receive notice
and to vote or to give any consent with respect thereto and to be held liable
for such calls and assessments, if any, as may lawfully be made thereon,
regardless of any transfer, pledge or other disposition



                                       11


<PAGE>



of such stock until the shares have been properly transferred on the books of
the corporation.

         It shall be the duty of each stockholder to notify the corporation of
his post office address.

          (b) Record Date. In order that the corporation may determine the
stockholders entitled to notice of or to vote at any meeting of stockholders or
any adjournment thereof, the board of directors may fix a record date, which
record date shall not precede the date upon which the resolution fixing the
record date is adopted by the board of directors, and which record date shall
not be more than sixty nor less than ten days before the date of such meeting.
If no such record date is fixed by the board of directors, the record date for
determining the stockholders entitled to notice of or to vote at a meeting of
stockholders shall be at the close of business on the day next preceding the day
on which notice is given, or, if notice is waived, at the close of business on
the day next preceding the day on which the meeting is held. A determination of
stockholders of record entitled to notice of or to vote at a meeting of
stockholders shall apply to any adjournment of the meeting; provided, however,
that the board of directors may fix a new record date for the adjourned meeting.

         In order that the corporation may determine the stockholders entitled
to consent to corporate action in writing without a meeting, the board of
directors may fix a record date, which record date shall not precede the date
upon which the resolution fixing the record date is adopted by the board of
directors, and which date shall not be more than ten days after the date upon
which the resolution fixing the record date is adopted by the board of
directors. If no such record date has been fixed by the board of directors, the
record date for determining stockholders entitled to consent to corporate action
in writing without a meeting, when no prior action by the board of directors is
required by the General Corporation Law of the State of Delaware, shall be the
first date on which a signed written consent setting forth the action taken or
proposed to be taken is delivered to the corporation by delivery to its
registered office in Delaware by hand or certified or registered mail, return
receipt requested, to its principal place of business or to an officer or agent
of the corporation having custody of the book in which proceedings of meetings
of stockholders are recorded. If no record date has been fixed by the board of
directors and prior action by the board of directors is required by the General
Corporation Law of the State of Delaware, the record date for determining
stockholders entitled to consent to corporate action in writing without a
meeting shall be at the close of business on the day on which the board of
directors adopts the resolution taking such prior action.



                                       12


<PAGE>



         In order that the corporation may determine the stockholders entitled
to receive payment of any dividend or other distribution or allotment of any
rights or to exercise any rights in respect of any change, conversion or
exchange of stock, or for the purpose of any other lawful action, the board of
directors may fix a record date, which record date shall not precede the day
upon which the resolution fixing the record date is adopted, and which record
date shall be not more than sixty days prior to such payment, exercise or other
action. If no such record date is fixed, the record date for determining
stockholders for any such purpose shall be at the close of business on the day
on which the board of directors adopts the resolution relating thereto.

         SECTION 9.  Corporate Seal.

         Subject to alteration by the directors, the seal of the corporation
shall consist of a flat-faced circular die with the word "Delaware" and the name
of the corporation cut or engraved thereon, together with such other words,
dates or images as may be approved from time to time by the directors.

         SECTION 10.  Execution of Papers.

         Except as the board of directors may generally or in particular cases
authorize the execution thereof in some other manner, all deeds, leases,
transfers, contracts, bonds, notes, checks, drafts or other obligations made,
accepted or endorsed by the corporation shall be signed by the chairman of the
board, if any, the president, a vice president or the treasurer.

         SECTION 11.  Fiscal Year.

         The fiscal year of the corporation shall end on the 31st of December.

         SECTION 12.  Amendments.

         These by-laws may be adopted, amended or repealed by vote of a majority
of the directors then in office or by vote of a majority of the voting power of
the stock outstanding and entitled to vote. Any by-law, whether adopted, amended
or repealed by the stockholders or directors, may be amended or reinstated by
the stockholders or the directors.



                                       13




                                                                     EXHIBIT 4.1

                                      INVESTORS' AGREEMENT

                                           dated as of

                                       September 29, 1999

                                              among

                           CHARLES RIVER LABORATORIES HOLDINGS, INC.

                                             and the

                      several Stockholders from time to time parties hereto






<PAGE>



                               TABLE OF CONTENTS

                            ----------------------

                                                                           PAGE
                                                                           ----

                                   ARTICLE 1
                                  DEFINITIONS

SECTION 1.01.  Definitions....................................................1

                                   ARTICLE 2
                             CORPORATE GOVERNANCE

SECTION 2.01.  Composition of the Board.......................................8
SECTION 2.02.  Removal........................................................9
SECTION 2.03.  Vacancies......................................................9
SECTION 2.04.  Meetings.......................................................9
SECTION 2.05.  Action by the Board............................................9
SECTION 2.06.  Conflicting Charter or Bylaw Provisions.......................10

                                   ARTICLE 3
                           RESTRICTIONS ON TRANSFER

SECTION 3.01.  General.......................................................10
SECTION 3.02.  Legends.......................................................11
SECTION 3.03.  Permitted Transferees.........................................11
SECTION 3.04.  Restrictions on Transfers by Management Stockholders..........11
SECTION 3.05.  Restrictions on Transfers by CRL..............................12
SECTION 3.06.  Restrictions on Transfers by New Minority Shareholders;
               Right of First Refusal........................................13

                                   ARTICLE 4
                      TAG-ALONG RIGHTS; DRAG-ALONG RIGHTS

SECTION 4.01.  Rights to Participate in Transfer.............................15
SECTION 4.02.  Right to Compel Participation in Certain Transfers............17

                                   ARTICLE 5
                              REGISTRATION RIGHTS

SECTION 5.01.  Demand Registration...........................................19
SECTION 5.02.  Incidental Registration.......................................22
SECTION 5.03.  Holdback Agreements...........................................23
SECTION 5.04.  Registration Procedures.......................................24



<PAGE>


                                                                            PAGE
                                                                            ----

SECTION 5.05.  Indemnification by the Company................................27
SECTION 5.06.  Indemnification by Participating Stockholders.................27
SECTION 5.07.  Conduct of Indemnification Proceedings........................28
SECTION 5.08.  Contribution..................................................29
SECTION 5.09.  Participation in Public Offering..............................30
SECTION 5.10.  Other Indemnification.........................................31
SECTION 5.11.  Cooperation by the Company....................................31

                                   ARTICLE 6
                                 MISCELLANEOUS

SECTION 6.01.  Entire Agreement..............................................31
SECTION 6.02.  Binding Effect; Benefit; Treatment of TCW Entities............31
SECTION 6.03.  Exclusive Financial and Investment Banking Advisor............32
SECTION 6.04.  Put Right.....................................................32
SECTION 6.05.  Pre-emptive Rights............................................33
SECTION 6.06.  Assignability.................................................33
SECTION 6.07.  Amendment; Waiver; Termination................................34
SECTION 6.08.  Notices.......................................................34
SECTION 6.09.  Headings......................................................37
SECTION 6.10.  Counterparts..................................................37
SECTION 6.11.  Applicable Law................................................37
SECTION 6.12.  Specific Enforcement..........................................37
SECTION 6.13.  Consent to Jurisdiction.......................................37



                                      ii



<PAGE>



                             INVESTORS' AGREEMENT

         AGREEMENT dated as of September 29, 1999 among Charles River
Laboratories Holdings, Inc., a Delaware corporation (the "Company"), CRL
Acquisition LLC, a Delaware limited liability company (the "LLC"), DLJ
Investment Partners, L.P., DLJ Investment Funding, Inc., DLJ ESC II L.P.
(collectively with DLJ Investment Partners, L.P., and DLJ Investment Funding,
Inc., "DLJIP"), The 1818 Mezzanine Fund, L.P. ("BB"), Carlyle High Yield
Partners, L.P. ("Carlyle"), B&L CRL, Inc., a Delaware corporation ("CRL"), the
TCW Entities (as defined herein) (if and when the TCW Entities execute a
counterpart of this Agreement), and certain other Persons listed on the
signature pages hereof (each, a "Management Stockholder", and collectively,
the "Management Stockholders").

         The parties hereto agree as follows:



                                   ARTICLE 1
                                  DEFINITIONS

         SECTION 1.01.  Definitions.  (a) The following terms, as used herein,
have the following meanings:

         "Adverse Person" means any Person whom the Board of Directors of the
Company reasonably determines is a competitor or a potential competitor of the
Company or its subsidiaries in a business that is material to the Company and
its subsidiaries, taken as a whole.

         "Affiliate" means, with respect to any Person, any other Person
directly or indirectly controlling, controlled by, or under common control
with such Person; provided that no stockholder of the Company shall be deemed
an Affiliate of any other stockholder of the Company solely by reason of any
investment in the Company. For the purpose of this definition, the term
"control" (including with correlative meanings, the terms "controlling",
"controlled by" and "under common control with"), when used with respect to
any Person, means the possession, directly or indirectly, of the power to
direct or cause the direction of the management and policies of such Person,
whether through the ownership of voting securities, by contract or otherwise.

         "Affiliated Employee Benefit Trust" means any trust that is a
successor to the assets held by a trust established under an employee benefit
plan subject to






<PAGE>



ERISA or any other trust established directly or indirectly under such plan or
any other such plan having the same sponsor.

         "Board" means the board of directors of the Company.

         "Business Day" means any day except a Saturday, Sunday or other day
on which commercial banks in New York City are authorized by law to close.

         "Bylaws" means the Bylaws of the Company, as amended from time to
time.

         "Charter" means the Certificate of Incorporation of the Company, as
amended from time to time.

         "Closing Date" means September 29, 1999.

         "Common Stock" means the common stock, par value $0.01 per share, of
the Company and any stock into which such Common Stock may thereafter be
converted or changed, and "Common Shares" means shares of Common Stock.

         "Company Securities" means the Common Stock and securities
convertible into or exchangeable for Common Stock and options, warrants
(including the Warrants) or other rights to acquire Common Stock or any other
equity security issued by the Company, provided that notwithstanding the
foregoing, the term "Company Securities" shall not include the High Yield
Warrants.

         "Drag-Along Portion" means, with respect to any Other Stockholder and
any class of Company Securities, the number of such class of Company
Securities beneficially owned by such Other Stockholder on a Fully Diluted
basis (but without duplication) multiplied by a fraction, the numerator of
which is the number of such class of Company Securities proposed to be sold by
the LLC on behalf of the LLC and the Other Stockholders and the denominator of
which is the total number of such class of Company Securities on a Fully
Diluted basis beneficially owned by the Stockholders.

         "Exchange Act" means the Securities Exchange Act of 1934, as amended.

         "Fully Diluted" means, with respect to Common Stock and without
duplication, all outstanding Shares and all Shares issuable in respect of
securities convertible into or exchangeable for Shares, options, warrants
(including the Warrants) and other rights to purchase or subscribe for Shares
or securities convertible into or exchangeable for Common Stock; provided
that, to the extent


                                      2



<PAGE>



any of the foregoing options, warrants or other rights to purchase or
subscribe for Shares are subject to vesting, the Shares subject to vesting
shall be included in the definition of "Fully Diluted" only upon and to the
extent of such vesting; and provided further that any Shares that vest upon
and as a result of a certain transaction shall be included in the definition
of "Fully Diluted" for purposes of such transaction.

         "High Yield Warrants" means the warrants that are issued to
purchasers of the Senior Subordinated Notes of Charles River Laboratories,
Inc. on or around the Closing Date for the purchase of shares of Common Stock
constituting not more than 6% of the fully diluted equity of the Company.

         "Initial Ownership" means, with respect to any Stockholder and any
class of Company Securities, the number of shares of such class of Company
Securities beneficially owned (and without duplication) which such Persons
have the right to acquire as of the date hereof, or in the case of any Person
that shall become a party to this Agreement on a later date, as of such date,
taking into account any stock split, stock dividend, reverse stock split or
similar event.

         "Initial Public Offering" means the first sale after the date hereof
of Common Stock pursuant to an effective registration statement under the
Securities Act (other than (1) a registration statement on Form S-8 or any
successor form and (2) a shelf registration statement filed with respect to
the High Yield Warrants and / or Warrants).

         "Other Stockholders" means all Stockholders other than the LLC and
its Permitted Transferees; provided that DLJIP, BB, Carlyle, and the TCW
Entities shall be considered for purposes of this Agreement to be Other
Stockholders.

         "Permitted Transferee" means:

                           (i) in the case of the LLC: (A) any of: DLJ
                  Merchant Banking Partners II, L.P., a Delaware limited
                  partnership, DLJ Offshore Partners II, C.V. a Netherlands
                  Antilles limited partnership, DLJ Merchant Banking Partners
                  II-A, L.P., a Delaware limited partnership, DLJ Diversified
                  Partners, L.P., a Delaware limited partnership, DLJ
                  Diversified Partners-A, L.P., a Delaware limited
                  partnership, DLJ EAB Partners, L.P., a Delaware limited
                  partnership, DLJ Millennium Partners, L.P., a Delaware
                  limited partnership, DLJ Millennium Partners-A, L.P., a
                  Delaware limited partnership, DLJMB Funding II, Inc., a
                  Delaware corporation, UK Investment Plan 1997 Partners, a
                  Delaware partnership, DLJ First ESC, L.P., a Delaware
                  limited partnership


                                      3



<PAGE>



                  and DLJ ESC II, L.P., a Delaware limited partnership, (each
                  of the foregoing, a "DLJ Entity", and collectively, the "DLJ
                  Entities"), (B) any general or limited partner of any DLJ
                  Entity (a "DLJ Partner"), and any corporation, partnership,
                  Affiliated Employee Benefit Trust or other entity that is an
                  Affiliate of any DLJ Partner (collectively, the "DLJ
                  Affiliates"), (C) any managing director, general partner,
                  director, limited partner, officer or employee of any DLJ
                  Entity or of any DLJ Affiliate, or the heirs, executors,
                  administrators, testamentary trustees, legatees or
                  beneficiaries of any of the foregoing persons referred to in
                  this clause (C) (collectively, "DLJ Associates"), (D) a
                  trust, the beneficiaries of which, or a corporation, limited
                  liability company or partnership, the stockholders, members
                  or general or limited partners of which, include only DLJ
                  Entities, DLJ Affiliates, DLJ Associates, their spouses or
                  their lineal descendants, or (E) a voting trustee for one or
                  more DLJ Entities, DLJ Affiliates or DLJ Associates;
                  provided that notwithstanding the foregoing, no Other
                  Stockholder shall be a Permitted Transferee of the LLC;

                           (ii) in the case of CRL, Bausch & Lomb Incorporated
                  ("B&L"), or any wholly-owned subsidiary of B&L; and

                           (iii) in the case of any Management Stockholder:
                  (A) a Person to whom Shares are transferred from such Other
                  Stockholder (1) by will or the laws of descent and
                  distribution or (2) by gift without consideration of any
                  kind; provided that, in the case of clause (2), such
                  transferee is the issue or spouse of such Management
                  Stockholder, (B) a trust that is for the exclusive benefit
                  of such Management Stockholder or its Permitted Transferees
                  under (A) above, or a custodian or guardian for the
                  exclusive benefit of the same, or (C) the Company, in a
                  transfer approved by the Board; and

                           (iv) in the case of DLJIP, BB, Carlyle, and the TCW
                  Entities: any Affiliate of such Person.

         "Person" means an individual, corporation, partnership, association,
trust or other entity or organization, including a government or political
subdivision or an agency or instrumentality thereof.

         "Pro Rata Portion" means the number of Shares a Stockholder holds
multiplied by a fraction, the numerator of which is the number of Shares to be
sold by the LLC and its Permitted Transferees in a Public Offering and the


                                      4



<PAGE>



denominator of which is the total number of Shares, on a Fully Diluted basis,
held in the aggregate by the LLC and its Permitted Transferees prior to such
Public Offering (excluding any Shares acquired or acquirable upon the exercise
of High Yield Warrants).

         "Public Offering" means an underwritten public offering of
Registrable Securities of the Company pursuant to an effective registration
statement under the Securities Act.

         "Registrable Securities" means any Shares or Warrants until (i) a
registration statement covering such Shares or Warrants has been declared
effective by the SEC and such Shares or Warrants have been disposed of
pursuant to such effective registration statement, (ii) such Shares or
Warrants are sold under circumstances in which all of the applicable
conditions of Rule 144 are met, or (iii) such Shares or Warrants are otherwise
transferred, the Company has delivered a new certificate or other evidence of
ownership for such Shares or Warrants not bearing the legend required pursuant
to this Agreement and such Shares or Warrants may be resold without subsequent
registration under the Securities Act, provided that the term "Registrable
Securities" shall not apply to any Shares received upon exercise of any High
Yield Warrants.

         "Registration Expenses" means (i) all registration and filing fees,
(ii) fees and expenses of compliance with securities or blue sky laws
(including reasonable fees and disbursements of counsel in connection with
blue sky qualifications of the Shares or Warrants), (iii) printing expenses,
(iv) internal expenses of the Company (including, without limitation, all
salaries and expenses of its officers and employees performing legal or
accounting duties), (v) reasonable fees and disbursements of counsel for the
Company and customary fees and expenses for independent certified public
accountants retained by the Company (including the expenses of any comfort
letters or costs associated with the delivery by independent certified public
accountants of a comfort letter or comfort letters requested pursuant to
Section 5.04(h)), (vi) the reasonable fees and expenses of any special experts
retained by the Company in connection with such registration, (vii) reasonable
fees and expenses of one counsel for the Stockholders participating in the
offering selected (A) by the LLC, in the case of any offering in which the LLC
or any Permitted Transferee of the LLC participates, or (B) in any other case,
by the Other Stockholders holding the majority of Shares to be sold for the
account of all Other Stockholders in the offering, (viii) fees and expenses in
connection with any review of underwriting arrangements by the National
Association of Securities Dealers, Inc. (the "NASD") including fees and
expenses of any "qualified independent underwriter" and (ix) fees and
disbursements of underwriters customarily paid by issuers or sellers of
securities; but shall not include any underwriting fees, discounts or
commissions attributable to the sale of



                                      5


<PAGE>



Registrable Securities, or any out-of-pocket expenses (except as set forth in
clause (vii) above) of the Stockholders (or the agents who manage their
accounts) or any fees and expenses of underwriter's counsel.

         "Restriction Termination Date" means the earlier to occur of (a) the
second anniversary of the Initial Public Offering and (b) the fifth
anniversary of the Closing Date.

         "Rule 144" means Rule 144 and Rule 144A (or any successor provisions)
under the Securities Act.

         "SEC" means the Securities and Exchange Commission.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Shares" means shares of Common Stock.

         "Stockholder" means each Person (other than the Company) who shall be
a party to or bound by this Agreement, whether in connection with the
execution and delivery hereof as of the date hereof, pursuant to Section 6.06,
or otherwise, so long as such Person shall (i) beneficially own (directly or
indirectly) any Company Securities, or (ii) have any stock appreciation
rights, options, warrants (other than High Yield Warrants) or other rights to
purchase or subscribe for Company Securities.

         "Subject Securities" means any Company Securities beneficially owned
by the Other Stockholders.

         "Tag-Along Portion" means the number of shares of Common Stock held
(or, without duplication, acquirable under the Warrants) (excluding any shares
of Common Stock acquired or acquirable under the High Yield Warrants) by the
Tagging Person or the Selling Person, as the case may be, multiplied by a
fraction, the numerator of which is the number of shares of Common Stock
proposed to be sold in the Tag-Along Sale pursuant to Section 4.01, and the
denominator of which is the aggregate number of shares of Common Stock on a
Fully Diluted basis owned by all Stockholders (excluding any shares of Common
Stock acquired or acquirable under the High Yield Warrants).

         "TCW Entities" means TCW/Crescent Mezzanine Partners II, L.P.,
TCW/Crescent Mezzanine Trust II, Crescent/MACH I Partners, L.P., TCW Leveraged
Income Trust, L.P. and TCW Leveraged Income Trust II, L.P.



                                      6


<PAGE>



         "Third Party" means a prospective purchaser of Shares in an arm's-
length transaction from a Stockholder where such purchaser is not a Permitted
Transferee of such Stockholder.

         "Warrants" means the warrants issued by the Company to the DLJ
Entities for the purchase of shares of Common Stock constituting not more than
10% (the "Agreed Percentage") of the fully diluted equity of the Company,
provided that the Agreed Percentage shall be subject to adjustment in the
event of any disruption or adverse change in current financial or capital
markets generally or in the market for new issuances of high yield securities.

         "Warrant Shares" means shares of Common Stock issuable by the Company
upon exercise of the Warrants.

          (b) The term "LLC", to the extent the LLC shall have transferred any
of its Shares to "Permitted Transferees", shall mean the LLC and the Permitted
Transferees of the LLC, taken together, and any right or action that may be
taken at the election of the LLC may be taken at the election of the holders
of a majority of the Shares then held by the LLC and such Permitted
Transferees. In the event of a distribution of Shares by the LLC to the
holders of limited liability company interests in the LLC, the term "LLC"
shall be deemed to mean the DLJ Entities and their Permitted Transferees,
taken together, and any right or action that may be taken at the election of
the DLJ Entities may be taken at the election of the holders of a majority of
the Shares then held by the DLJ Entities and such Permitted Transferees.

          (c) The term "Other Stockholders", to the extent such stockholders
shall have transferred any of their Shares to "Permitted Transferees", shall
mean the Other Stockholders and the Permitted Transferees of the Other
Stockholders, taken together, and any right or action that may be taken at the
election of the Other Stockholders may be taken at the election of the Other
Stockholders and such Permitted Transferees.

          (d) Each of the following terms is defined in the Section set forth
opposite such term:

                           Term                               Section

                  Applicable Holdback Period                  5.03
                  beneficially own                            1.01(a)
                  Demand Registration                         5.01(e)
                  DLJSC                                       6.03



                                      7


<PAGE>



                  Drag-Along Rights                           4.02(a)
                  Exercise Period                             6.04
                  Holders                                     5.01(a)
                  Incidental Registration                     5.01(e)
                  Indemnified Party                           5.07
                  Indemnifying Party                          5.07
                  Inspectors                                  5.04(g)
                  Maximum Offering Size                       5.01(e)
                  Nominee                                     2.03(a)
                  Put                                         6.04
                  Records                                     5.04(g)
                  Section 4.01 Response Notice                4.01(a)
                  Section 4.02 Notice                         4.02(a)
                  Section 4.02 Notice Period                  4.02(a)
                  Section 4.02 Sale                           4.02(a)
                  Section 4.02 Sale Price                     4.02(a)
                  Selling Person                              4.01(a)
                  Selling Stockholder                         5.01(e)
                  Tag-Along Notice                            4.01(a)
                  Tag-Along Notice Period                     4.01(a)
                  Tag-Along Offer                             4.01(a)
                  Tag-Along Right                             4.01(a)
                  Tag-Along Sale                              4.01(a)
                  Tagging Person                              4.01(a)
                  transfer                                    3.01


                                   ARTICLE 2
                             CORPORATE GOVERNANCE

         SECTION 2.01. Composition of the Board. (a) The Board shall consist
initially of nine directors, (i) seven of whom (including the Chairman) will
be designated by DLJ Merchant Banking Partners II, L.P., (ii) one of whom will
be designated by CRL, and (iii) one of whom will be the Chief Executive
Officer appointed by the Board. DLJIP shall be entitled to designate one
observer to the Board, who shall be entitled to receive a copy of any
materials distributed to all members of the Board, until the date on which
DLJIP owns (directly or indirectly) less than 50% of the equity interest in
the Company which it owned (indirectly) as of the Closing Date.


          (b) Each Stockholder (other than CRL) entitled to vote for the
election of directors to the Board agrees that it will vote its Shares or
execute written consents, as the case may be, and take all other necessary
action (including



                                      8


<PAGE>



causing the Company to call a special meeting of stockholders) in order to
ensure that the composition of the Board is as set forth in this Section 2.01;
provided that no Other Stockholder shall be required to vote for the
board-designees of DLJ Merchant Banking Partners II, L.P. if the aggregate
number of Common Shares held by the LLC is less than 10% of its Initial
Ownership of Common Shares, and provided further that no party hereto shall be
required to vote for the board- designee of CRL if the aggregate number of
Common Shares held by CRL is less than 40% of the Initial Ownership of CRL.

         SECTION 2.02. Removal. Each Stockholder (other than CRL) agrees that
if, at any time, it is then entitled to vote for the removal of directors of
the Company, it will not vote any of its Shares in favor of the removal of any
director who shall have been designated or nominated pursuant to Section 2.01
unless such removal shall be for cause or the Persons entitled to designate or
nominate such director shall have consented to such removal in writing.

         SECTION 2.03.  Vacancies.  If, as a result of death, disability,
retirement, resignation, removal (with or without cause) or otherwise, there
shall exist or occur any vacancy of the Board:

          (a) the Person or Persons entitled under Section 2.01 to designate
or nominate such director whose death, disability, retirement, resignation or
removal resulted in such vacancy may designate another individual (the
"Nominee") to fill such capacity and serve as a director of the Company; and

          (b) each Stockholder (other than CRL) then entitled to vote for the
election of the Nominee as a director of the Company agrees that it will vote
its Shares, or execute a written consent, as the case may be, in order to
ensure that the Nominee is elected to the Board.

         SECTION 2.04. Meetings. The Board shall hold a regularly scheduled
meeting at least once every calendar quarter, and notice of each meeting shall
be given to all directors at least five Business Days prior to such meeting.

         SECTION 2.05. Action by the Board. (a) A quorum of the Board shall
consist of four directors, of whom at least three must be designees of DLJ
Merchant Banking Partners II, L.P.; provided that the LLC shall have the right
at any time to change the number of directors necessary to constitute a quorum
of the Board. All actions of the Board shall require the affirmative vote of
at least a majority of the directors present at a duly convened meeting of the
Board at which a quorum is present or the unanimous written consent of the
Board; provided that, in the event there is a vacancy on the Board and an
individual has been nominated to fill such vacancy, the first order of
business shall be to fill such vacancy.



                                      9


<PAGE>



         (b) CRL shall have the right to send an observer who is an employee
of B&L or an Affiliate of B&L to any meeting of the Board that the director
who is designated by CRL is unable to attend. The observer shall have the
privilege of voice but no vote with respect to any matter and shall be given a
copy of any materials distributed to the Board members for such meeting.

         (c) The Board may create executive, compensation and audit
committees, as well as such other committees as it may determine. DLJ Merchant
Banking Partners II, L.P. shall be entitled to designate a majority of the
directors on any committee created by the Board.

         SECTION 2.06. Conflicting Charter or Bylaw Provisions. Each
Stockholder shall vote its Shares or execute written consents, as the case may
be, and take all other actions necessary, to ensure that the Company's Charter
and Bylaws facilitate and do not at any time conflict with any provision of
this Agreement.


                                   ARTICLE 3
                           RESTRICTIONS ON TRANSFER

         SECTION 3.01. General. Each Stockholder understands and agrees that
the Company Securities purchased pursuant to the applicable subscription
agreement have not been registered under the Securities Act and are restricted
securities. Each Stockholder agrees that it will not, directly or indirectly,
sell, assign, transfer, grant a participation in, pledge or otherwise dispose
of ("transfer") any Company Securities (or solicit any offers to buy or
otherwise acquire, or take a pledge of any Company Securities) except in
compliance with the Securities Act and the terms and conditions of this
Agreement.

         Any attempt to transfer any Company Securities not in compliance with
this Agreement shall be null and void and the Company shall not, and shall
cause any transfer agent not to, give any effect in the Company's stock
records to such attempted transfer.

         No transferee other than a Permitted Transferee or a party hereto shall
be required or permitted to become a party to this Agreement or have the benefit
of any rights hereunder or the burden of any obligations hereunder.

         Except as set forth in the first sentence of this Section 3.01,
transfers by the LLC are not subject to any restrictions.



                                      10


<PAGE>



         SECTION 3.02. Legends. In addition to any other legend that may be
required, each certificate for shares of Common Stock and each Warrant that is
issued to any Stockholder shall bear a legend in substantially the following
form:

         "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED, OR ANY STATE SECURITIES LAWS AND MAY NOT BE OFFERED OR SOLD
EXCEPT IN COMPLIANCE THEREWITH. THIS SECURITY IS ALSO SUBJECT TO ADDITIONAL
RESTRICTIONS ON TRANSFER AS SET FORTH IN THE INVESTORS' AGREEMENT DATED AS OF
SEPTEMBER 29, 1999, COPIES OF WHICH MAY BE OBTAINED UPON REQUEST FROM CHARLES
RIVER LABORATORIES HOLDINGS, INC. OR ANY SUCCESSOR THERETO."

                If any Company Securities shall cease to be Registrable
Securities under clause (i) or clause (ii) of the definition thereof, the
Company shall, upon the written request of the holder thereof, issue to such
holder a new certificate evidencing such securities without the first sentence
of the legend required by this Section endorsed thereon. If any Company
Securities cease to be subject to any and all restrictions on transfer set
forth in this Agreement, the Company shall, upon the written request of the
holder thereof, issue to such holder a new certificate evidencing such Company
Securities without the second sentence of the legend required by this Section
endorsed thereon.

         SECTION 3.03. Permitted Transferees. Notwithstanding anything in this
Agreement to the contrary, any Stockholder may at any time transfer any or all
of its Company Securities to one or more of its Permitted Transferees without
the consent of the Board or any other Stockholder or group of Stockholders and
without compliance with Sections 3.04, 3.05, 3.06 and 4.01 so long as (a) such
Permitted Transferee shall have agreed in writing to be bound by the terms of
this Agreement and (b) the transfer to such Permitted Transferee is not in
violation of applicable federal or state securities laws.

         SECTION 3.04.  Restrictions on Transfers by Management Stockholders.

          (a) Each Management Stockholder and each Permitted Transferee of
such Management Stockholder may transfer its Company Securities only as
follows:

              (i) in a transfer made in compliance with Section 4.01 or 4.02;

             (ii) subject to the Public Offering Limitations, in a Public
         Offering in connection with the exercise of its rights under Article
         5 hereof;



                                      11


<PAGE>




            (iii) after the Initial Public Offering, pursuant to the exemption
         from registration provided under Rule 144, provided that until the
         later of (A) the third anniversary of the IPO and (B) the Restriction
         Termination Date, such sales cannot reduce the Stockholder's
         ownership to (or occur at a time when such Stockholder's ownership is
         otherwise) below the greater of (X) 50% of his or her Initial
         Ownership and (Y) that percentage of his or her Initial Ownership as
         equals the percentage of the LLC's Initial Ownership remaining after
         previous dispositions by the LLC; or

             (iv) following the Restriction Termination Date, to (A) any Third
         Party other than an Adverse Person or any person deemed inappropriate
         by the Board or (B) any Third Party through a national securities
         exchange, in each case for consideration consisting solely of cash,
         provided, however, that the amount sold in any 12-month period may
         not exceed 20% of the Management Stockholder's Initial Ownership.

         For purposes of this Agreement, "Public Offering Limitations" means
(A) no Management Stockholder shall be permitted to sell any Shares in the
Initial Public Offering, (B) in the first public offering following the
Initial Public Offering, no Management Stockholder may sell more than the
lesser of (x) 50% of his or her Pro Rata Portion and (y) 20% of his or her
holdings prior to the offering and (C) in each public offering thereafter,
each Management Stockholder may sell no more than the lesser of (x) his or her
Pro Rata Portion and (y) 50% of his or her holdings prior to the offering.

          (b) The provisions of Section 3.04(a) shall terminate upon the
earliest to occur of (i) the tenth anniversary of the Closing Date and (ii)
the date upon which the shareholdings of the LLC fall below 10% of its Initial
Ownership. Notwithstanding the foregoing sentence, the provisions of Section
3.04(a) shall not terminate with respect to any Management Stockholder's
Shares which shall have been pledged to the Company as security in connection
with any indebtedness for borrowed money owed by such Management Stockholder
to the Company unless the proceeds from the sale of such Shares are applied to
repay such indebtedness in full.

         SECTION 3.05.  Restrictions on Transfers by CRL.

          (a) CRL may transfer its Company Securities only as follows:

              (i) in a transfer made in compliance with Section 4.01 or 4.02;



                                      12



<PAGE>



             (ii) in a Public Offering in connection with the exercise of its
         rights under Article 5 hereof;

            (iii) after the Initial Public Offering, pursuant to the exemption
         from registration provided under Rule 144, provided, however, that
         the amount sold in any 12-month period pursuant to this clause (iii)
         may not exceed 25% of CRL's Initial Ownership.

             (iv) following the Restriction Termination Date, to (A) any Third
         Party other than an Adverse Person or any person deemed inappropriate
         by the Board or (B) any Third Party through a national securities
         exchange, in each case for consideration consisting solely of cash.

          (b) The provisions of Section 3.05(a) shall terminate upon the
earliest to occur of (i) the tenth anniversary of the Closing Date and (ii)
the date upon which the shareholdings of the LLC fall below 10% of its Initial
Ownership.

          SECTION 3.06.  Restrictions on Transfers by New Minority Shareholders;
Right of First Refusal.

          (a) Each of DLJIP, BB, Carlyle, and the TCW Entities (a "New
Minority Shareholder") may transfer its Company Securities only as follows:

              (i) in a transfer made in compliance with Section 4.01 or 4.02;

             (ii) in a Public Offering in connection with the exercise of its
         rights under Article 5 hereof;

            (iii) after the Initial Public Offering, pursuant to the exemption
         from registration provided under Rule 144;

             (iv) after the earlier of (A) 3 years from the Closing Date or (B)
         the Initial Public Offering, to any Third Party other than an Adverse
         Person or any person deemed inappropriate by the Board, provided in
         the case of any transfer prior to the Initial Public Offering that
         the transferor shall first have complied with Section 3.06(b) and
         that the consideration shall consist solely of cash; or

              (v) to the limited partners of such New Minority
         Shareholder, as part of a general distribution of all assets held by
         such New Minority Shareholder to its limited partners; provided that
         any transferees pursuant to this clause (v) shall be deemed not to be
         Permitted Transferees.



                                      13


<PAGE>



          (b) Right of First Refusal.

              (i) If, prior to an Initial Public Offering, a New Minority
         Shareholder proposes to transfer Company Securities owned by such New
         Minority Shareholder in a transaction pursuant to and permitted by
         Section 3.06(a)(iv), such New Minority Shareholder shall provide DLJ
         Merchant Banking II, Inc. and the Company written notice of such
         proposed transfer. The notice shall identify the number of Company
         Securities proposed to be transferred, the cash price at which a
         transfer is proposed to be made and all other material terms and
         conditions of the offer.

             (ii) The receipt of a such notice by DLJ Merchant Banking II, Inc.
         and the Company from a New Minority Shareholder shall constitute an
         offer by such New Minority Shareholder to sell first, to the DLJ
         Entities and, if not accepted or only accepted in part by the DLJ
         Entities, second to the Company, for cash, the Company Securities at
         the price and on the other terms and conditions set forth in such
         notice. Such offer shall be irrevocable for 10 Business Days after
         receipt of such notice by the DLJ Entities and the Company. During
         such period, any of the DLJ Entities and the Company shall have the
         right to accept such offer as to all or a portion of the Company
         Securities (provided that first priority of the right to accept is
         given to the DLJ Entities; and provided further that the aggregate
         number of Company Securities accepted by the DLJ Entities and the
         Company together equals the total number of Company Securities
         subject to the offer) by giving a written notice of acceptance to
         such Ne Minority Shareholder prior to the expiration of the offer
         period.

            (iii) Any Person who has accepted the offer shall purchase and pay
         for all Company Securities accepted within 30 days after such
         acceptance.

             (iv) Upon the failure to accept the offer in full prior to the
         expiration of the offer period or the failure to consummate the
         purchase within 30 days after the acceptance of the offer, there
         shall commence a 60-day period during which the New Minority
         Shareholder that gave the notice shall have the right to transfer to
         a third party any or all of the Company Securities subject to such
         offer at a price in cash not less than 90% of the price indicated in
         the applicable notice to DLJ Merchant Banking II, Inc. and the
         Company, and on the other terms and conditions set forth therein,
         provided that the transfer to such third party is not in violation of
         applicable federal or state or foreign securities laws. If such New
         Minority Shareholder does not consummate the sale in accordance with
         the foregoing time limitations, such New Minority Shareholder may



                                      14


<PAGE>



         not thereafter transfer any Company Securities in a transaction
         pursuant to Section 3.06(a)(iv) without repeating the foregoing
         procedures.

          (c) The provisions of Section 3.06(a) shall terminate upon the
earliest to occur of (i) the tenth anniversary of the Closing Date and (ii)
the date upon which the shareholdings of the LLC fall below 10% of its Initial
Ownership.


                                   ARTICLE 4
                      TAG-ALONG RIGHTS; DRAG-ALONG RIGHTS

         SECTION 4.01. Rights to Participate in Transfer. (a) If the LLC (the
"Selling Person") proposes to transfer a number of Shares equal to or
exceeding 25% of the outstanding Shares in a single transaction or in a series
of related transactions on the date of the proposed sale (a "Tag-Along Sale"),
the Other Stockholders may, at their option, elect to exercise their rights
under this Section 4.01 (each such Stockholder, a "Tagging Person"), provided
that no such rights shall apply to transfers of Shares (i) in a Public
Offering or pursuant to Rule 144 (defined for these purposes to exclude Rule
144A under the Securities Act), (ii) to any Permitted Transferee of the LLC
(defined for these purposes to exclude, except in the case of a general
distribution to DLJ Partners, any Permitted Transferee who is a Permitted
Transferee solely by reason of being an Affiliate of a DLJ Partner), or (iii)
to holders of limited liability company units in the LLC ("Units"). In the
event of such a proposed transfer, the Selling Person shall provide each Other
Stockholder written notice of the terms and conditions of such proposed
transfer ("Tag-Along Notice") and offer each Tagging Person the opportunity to
participate in such sale. The Tag-Along Notice shall identify the number and
type of Company Securities subject to the offer ("Tag-Along Offer"), the cash
price at which the transfer is proposed to be made, and all other material
terms and conditions of the Tag-Along Offer, including the form of the
proposed agreement, if any. From the date of the Tag-Along Notice, each
Tagging Person shall have the right (a "Tag-Along Right"), exercisable by
written notice ("Section 4.01 Response Notice") given to the Selling Person
within 15 Business Days (the "Tag-Along Notice Period"), to request that the
Selling Person include in the proposed transfer the number of Company
Securities held by such Tagging Person as is specified in such notice;
provided that if the aggregate number of Company Securities proposed to be
sold by the Selling Person and all Tagging Persons in such transaction exceeds
the number of Company Securities which can be sold on the terms and conditions
set forth in the Tag-Along Notice, then only the Tag-Along Portion of Company
Securities of each Tagging Person shall be sold pursuant to the Tag-Along
Offer and the Selling Person shall sell its Tag-Along Portion of Company
Securities and such



                                      15


<PAGE>



additional Company Securities as permitted by Section 4.01(d). If the Tagging
Persons exercise their Tag-Along Rights hereunder, each Tagging Person shall
deliver, together with its Section 4.01 Response Notice, to the Selling Person
the certificate or certificates representing the Company Securities of such
Tagging Person to be included in the transfer, together with a limited
power-of-attorney authorizing the Selling Person to transfer such Securities
on the terms set forth in the Tag-Along Notice. Delivery of such certificate
or certificates representing the Company Securities to be transferred and the
limited power-of-attorney authorizing the Selling Person to transfer such
Company Securities shall constitute an irrevocable acceptance of the Tag-Along
Offer by such Tagging Persons. If, at the end of a 120 day period after such
delivery, the Selling Person has not completed the transfer of all such
Company Securities on substantially the same terms and conditions set forth in
the Tag-Along Notice (provided, however, that the cash price payable in any
such sale may exceed the cash price specified in the Tag-Along Notice by up to
10%), the Selling Person shall return to each Tagging Person the limited
power-of-attorney (and all copies thereof) together with all certificates
representing the Company Securities which such Tagging Person delivered for
transfer pursuant to this Section 4.01.

          (b) Concurrently with the consummation of the Tag-Along Sale, the
Selling Person shall notify the Tagging Persons thereof, shall remit to the
Tagging Persons the total consideration (by bank or certified check) for the
Company Securities of the Tagging Persons transferred pursuant thereto, and
shall, promptly after the consummation of such Tag-Along Sale, furnish such
other evidence of the completion and time of completion of such transfer and
the terms thereof as may be reasonably requested by the Tagging Persons.

          (c) If at the termination of the Tag-Along Notice Period any Tagging
Person shall not have elected to participate in the Tag-Along Sale, such
Tagging Person will be deemed to have waived its rights under Section 4.01(a)
with respect to the transfer of its securities pursuant to such Tag-Along
Sale, but not with respect to any future sales.

          (d) If any Stockholder declines to exercise its Tag-Along Rights or
elects to exercise its Tag-Along Rights with respect to less than such Tagging
Person's Tag-Along Portion, the Tagging Persons who do respond and the LLC
shall be entitled to transfer, pursuant to the Tag-Along Offer, an additional
number of Company Securities equal to the number of Company Securities
constituting their pro rata portion of such Tagging Person's Tag-Along Portion
with respect to which Tag-Along Rights were not exercised.

          (e) The LLC and any Tagging Person who exercises the Tag-Along
Rights pursuant to this Section 4.01 may sell the Company Securities subject
to



                                      16


<PAGE>



the Tag-Along Offer on the terms and conditions set forth in the Tag-Along
Notice (provided, however, that the cash price payable in any such sale may
exceed the cash price specified in the Tag-Along Notice by up to 10%) within
120 days of the date on which Tag-Along Rights shall have been waived,
exercised or expire.

         (f) In the event that the DLJ Entities propose to transfer a number
of Units equal to or exceeding 40% of the outstanding Units in a single
transaction or in a series of related transactions on the date of the proposed
sale, other than transfers of Units (i) in a Public Offering or pursuant to
Rule 144 (defined for these purposes to exclude Rule 144A under the Securities
Act) or (ii) to any Permitted Transferee of the LLC (defined for these
purposes to exclude, except in the case of a general distribution to DLJ
Partners, any Permitted Transferee who is a Permitted Transferee solely by
reason of being an Affiliate of a DLJ Partner), the Board of Directors shall
in good faith determine an appropriate procedure which shall mutatis mutandis
reflect the procedures of this Section 4.01 to allow Company Securities to be
sold proportionally by Other Stockholders as part of such sale, and shall in
good faith determine an appropriate valuation for such Company Securities
reflecting the price per Unit at which the DLJ Entities propose to sell the
Units.

         (g) This Section 4.01 shall terminate upon the Initial Public
Offering.

         SECTION 4.02. Right to Compel Participation in Certain Transfers. (a)
If (i) the LLC proposes to transfer not less than 50% of its Initial Ownership
of Common Stock to a Third Party in a bona fide sale or (ii) the LLC proposes
an arms-length transfer in which the shares of Common Stock to be transferred
by the LLC and its Permitted Transferees constitute more than 50% of the
outstanding shares of Common Stock (a "Section 4.02 Sale"), the LLC may at its
option require all Other Stockholders to sell the Drag-Along Portion of the
Subject Securities ("Drag-Along Rights") then held by every Other Stockholder,
and (subject to and at the closing of the Section 4.02 Sale) to exercise all,
but not less than all, of the options held by every Other Stockholder and to
sell all of the shares of Common Stock received upon such exercise to such
Third Party, for the same consideration per share of Common Stock and
otherwise on the same terms and conditions as the LLC; provided that any Other
Stockholder who holds options the exercise price per share of which is greater
than the per share price at which the Shares are to be sold to the Third Party
may, if required by the LLC to exercise such options, in place of such
exercise, submit to irrevocable cancellation thereof without any liability for
payment of any exercise price with respect thereto. In the event the Section
4.02 Sale is not consummated with respect to any shares acquired upon exercise
of such options, or the Section 4.02 Sale is not consummated, such options
shall be deemed not to have been exercised or



                                      17


<PAGE>



canceled, as applicable. The LLC shall provide written notice of such Section
4.02 Sale to the Other Stockholders (a "Section 4.02 Notice") not later than
the 15th Business Day prior to the proposed Section 4.02 Sale. The Section
4.02 Notice shall identify the transferee, the number of Subject Securities,
the consideration for which a transfer is proposed to be made (the "Section
4.02 Sale Price") and all other material terms and conditions of the Section
4.02 Sale. The number of shares of Common Stock to be sold by each Other
Stockholder will be the Drag-Along Portion of the shares of Common Stock that
such Other Stockholder owns. Each Other Stockholder shall be required to
participate in the Section 4.02 Sale on the terms and conditions set forth in
the Section 4.02 Notice and to tender all its Subject Securities as set forth
below. The price payable in such transfer shall be the Section 4.02 Sale
Price. Not later than the 10th Business Day following the date of the Section
4.02 Notice (the "Section 4.02 Notice Period"), each of the Other Stockholders
shall deliver to a representative of the LLC designated in the Section 4.02
Notice certificates representing all Subject Securities representing the Drag
Along Portion held by such Other Stockholder, duly endorsed, together with all
other documents required to be executed in connection with such Section 4.02
Sale. If an Other Stockholder should fail to deliver such certificates to the
representative of the LLC, the Company shall cause the books and records of
the Company to show that such Subject Securities are bound by the provisions
of this Section 4.02 and that such Subject Securities shall be transferred to
the purchaser of the Subject Securities immediately upon surrender for
transfer by the holder thereof.

          (b) The LLC shall have a period of 45 days from the date of receipt
of the Section 4.02 Notice to consummate the Section 4.02 Sale on the terms
and conditions set forth in such Section 4.02 Sale Notice. If the Section 4.02
Sale shall not have been consummated during such period, the LLC shall return
to each of the Other Stockholders all certificates representing Subject
Securities that such Other Stockholder delivered for transfer pursuant hereto,
together with any documents in the possession of the LLC executed by the Other
Stockholder in connection with such proposed transfer, and all the
restrictions on transfer contained in this Agreement or otherwise applicable
at such time with respect to Common Stock owned by the Other Stockholders
shall again be in effect.

          (c) Concurrently with the consummation of the transfer of Company
Securities pursuant to this Section 4.02, the LLC shall give notice thereof to
all Stockholders, shall remit to each of the Stockholders who have surrendered
their certificates the total consideration (by bank or certified check) for
the Subject Securities transferred pursuant hereto and shall furnish such
other evidence of the completion and time of completion of such transfer and
the terms thereof as may be reasonably requested by such Stockholders.



                                      18



<PAGE>



                                   ARTICLE 5
                              REGISTRATION RIGHTS

         SECTION 5.01. Demand Registration. (a) If the Company shall receive a
written request by the LLC or its Permitted Transferees or DLJIP (any such
requesting Person, a "Selling Stockholder") that the Company effect the
registration under the Securities Act of all or a portion of such Selling
Stockholder's Registrable Securities, and specifying the intended method of
disposition thereof, then the Company shall promptly give written notice of
such requested registration (a "Demand Registration") at least 30 days prior
to the anticipated filing date of the registration statement relating to such
Demand Registration to the Other Stockholders and thereupon will use its best
efforts to effect, as expeditiously as possible, the registration under the
Securities Act of:

              (i) the Registrable Securities which the Company has been so
         requested to register by the Selling Stockholders, then held by the
         Selling Stockholders; and

             (ii) subject to the restrictions set forth in Section 5.01(e), all
         other Registrable Securities of the same type as that to which the
         request by the Selling Stockholders relates which any Other
         Stockholder entitled to request the Company to effect an Incidental
         Registration (as such term is defined in Section 5.02) pursuant to
         Section 5.02 (all such Stockholders, together with the Selling
         Stockholders, the "Holders") has requested the Company to register by
         written request received by the Company within 15 days after the
         receipt by such Holders of such written notice given by the Company,

all to the extent necessary to permit the disposition (in accordance with the
intended methods thereof as aforesaid) of the Registrable Securities so to be
registered; provided that, subject to Section 5.01(d) hereof, the Company
shall not be obligated to effect (A) more than six Demand Registrations for
the LLC and its Permitted Transferees or (B) one Demand Registration for DLJIP
(which Demand Registration right may not be exercised prior to the earlier of
(1) five years from the Closing Date and (2) the date that is 180 days after
an Initial Public Offering); and provided further that the Company shall not
be obligated to effect a Demand Registration unless the aggregate proceeds
expected to be received from the sale of the Common Stock to be included in
such Demand Registration, in the reasonable opinion of DLJ Merchant Banking
II, Inc. exercised in good faith, equals or exceeds (Y) $30,000,000 if such
Demand Registration would constitute the Initial Public Offering, or (Z)
$10,000,000 in all other cases. In no event will the Company be required to
effect more than one Demand Registration within any four-month period.



                                      19


<PAGE>



          (b) Promptly after the expiration of the 15-day period referred to
in Section 5.01(a)(ii) hereof, the Company will notify all the Holders to be
included in the Demand Registration of the other Holders and the number of
Registrable Securities requested to be included therein. The Selling
Stockholders requesting a registration under this Section may, at any time
prior to the effective date of the registration statement relating to such
registration, revoke such request, without liability to any of the other
Holders, by providing a written notice to the Company revoking such request,
in which case such request, so revoked, shall be considered a Demand
Registration unless the participating Stockholders reimburse the Company for
all costs incurred by the Company in connection with such registration, or
unless such revocation arose out of the fault of the Company, in which case
such request shall not be considered a Demand Registration.

          (c) The Company will pay all Registration Expenses in connection
with any Demand Registration.

          (d) A registration requested pursuant to this Section shall not be
deemed to have been effected (i) unless the registration statement relating
thereto (A) has become effective under the Securities Act and (B) has remained
effective for a period of at least 180 days (or such shorter period in which
all Registrable Securities of the Holders included in such registration have
actually been sold thereunder); provided that if after any registration
statement requested pursuant to this Section becomes effective (x) such
registration statement is interfered with by any stop order, injunction or
other order or requirement of the SEC or other governmental agency or court
and (y) less than 75% of the Registrable Securities included in such
registration statement has been sold thereunder, such registration statement
shall not be considered a Demand Registration or (ii) if the Maximum Offering
Size (as defined below) is reduced in accordance with Section 5.01(e) or
5.01(f) such that less than 66 2/3% of the Registrable Securities of the
Selling Stockholders sought to be included in such registration are included.

          (e) If a Demand Registration involves an Underwritten Public
Offering and the managing underwriter shall advise the Company and the Selling
Stockholders that, in its view, (i) the number of Registrable Securities
requested to be included in such registration (including any securities which
the Company proposes to be included which are not Registrable Securities) or
(ii) the inclusion of some or all of the Registrable Securities owned by the
Holders, in any such case, exceeds the largest number of securities which can
be sold without having an adverse effect on such offering, including the price
at which such securities can be sold (the "Maximum Offering Size"), the
Company will include in such registration, in the priority listed below, up to
the Maximum Offering Size:



                                      20



<PAGE>



                       (A) first: (1) in the case of a Demand by the LLC and
                  its Permitted Transferees, all Securities requested to be
                  registered by the Selling Stockholder and by all of its
                  Permitted Transferees and CRL, DLJIP, BB, Carlyle, and the
                  TCW Entities (allocated, if necessary for the offering not
                  to exceed the Maximum Offering Size, pro rata among such
                  Persons on the basis of the relative number of shares of
                  Registrable Securities requested to be registered), or (2)
                  in the case of a Demand by DLJIP, all Securities requested
                  to be registered by the Selling Stockholder and by all of
                  its Permitted Transferees and BB, Carlyle, and the TCW
                  Entities (allocated, if necessary for the offering not to
                  exceed the Maximum Offering Size, pro rata among such
                  Persons on the basis of the relative number of shares of
                  Registrable Securities requested to be registered);

                       (B) second: (1) in the case of a Demand by the LLC and
                  its Permitted Transferees, all Registrable Securities
                  requested to be included in such registration by any other
                  Holder (allocated, if necessary for the offering not to
                  exceed the Maximum Offering Size, pro rata among such other
                  Holders on the basis of the relative number of shares of
                  Registrable Securities requested to be included in such
                  registration), or (2) in the case of a Demand by DLJIP, all
                  Registrable Securities requested to be included in such
                  registration by the LLC and its Permitted Transferees and by
                  CRL (allocated, if necessary for the offering not to exceed
                  the Maximum Offering Size, pro rata among such other Holders
                  on the basis of the relative number of shares of Registrable
                  Securities requested to be included in such registration);

                       (C) third: (1) in the case of a Demand by the LLC and
                  its Permitted Transferees, any securities proposed to be
                  registered by the Company, or (2) in the case of a Demand by
                  DLJIP, all Registrable Securities requested to be included
                  in such registration by any other Holder (allocated, if
                  necessary for the offering not to exceed the Maximum
                  Offering Size, pro rata among such other Holders on the
                  basis of the relative number of shares of Registrable
                  Securities requested to be included in such registration);
                  and

                       (D) fourth: in the case of a Demand by DLJIP, any
                  securities proposed to be registered by the Company.

          (f) If the Company files a shelf registration statement with respect
to the High Yield Warrants, the Company shall notify the holders of the
Warrants at



                                      21


<PAGE>



least 20 days prior to such filing. The holders of the Warrants shall have the
right (which shall not be deemed to be a use of a Demand Registration right),
by notice to the Company, to include the Warrants in such shelf registration
statement. Notwithstanding anything in this Agreement to the contrary, this
Agreement shall not be construed to confer on any Stockholder (other than
holders of Warrants in their capacity as such, together with any Persons
entitled to indemnification hereunder in connection therewith) any rights in
connection with such shelf registration statement.

         SECTION 5.02. Incidental Registration. (a) If the Company proposes to
register any Company Securities under the Securities Act (other than a
registration (A) on Form S-8 or S-4 or any successor or similar forms, (B)
relating to Common Stock issuable upon exercise of employee stock options or
in connection with any employee benefit or similar plan of the Company or (C)
in connection with a direct or indirect acquisition by the Company of another
company), whether or not for sale for its own account, it will each such time,
subject to the provisions of Section 5.02(b), give prompt written notice at
least 30 days prior to the anticipated filing date of the registration
statement relating to such registration to the LLC and each Other Stockholder,
which notice shall set forth such Stockholder's rights under this Section 5.02
and shall offer such Stockholders the opportunity to include in such
registration statement such number of Registrable Securities of the same type
as are proposed to be registered as each such Stockholder may request (an
"Incidental Registration"). Upon the written request of any such Stockholder
made within 15 days after the receipt of notice from the Company (which
request shall specify the number of Registrable Securities intended to be
disposed of by such Stockholder), the Company will use its best efforts to
effect the registration under the Securities Act of all Registrable Securities
which the Company has been so requested to register by such Stockholders, to
the extent requisite to permit the disposition of the Registrable Securities
so to be registered; provided that (I) if such registration involves a Public
Offering, all such Stockholders requesting to be included in the Company's
registration must sell their Registrable Securities to the underwriters
selected as provided in Section 5.04(f) on the same terms and conditions as
apply to the Company and (II) if, at any time after giving written notice of
its intention to register any stock pursuant to this Section 5.02(a) and prior
to the effective date of the registration statement filed in connection with
such registration, the Company shall determine for any reason not to register
such securities, the Company shall give written notice to all such
Stockholders and, thereupon, shall be relieved of its obligation to register
any Registrable Securities in connection with such registration (without
prejudice, however, to rights of the LLC under Section 5.01). No registration
effected under this Section 5.02 shall relieve the Company of its obligations
to effect a Demand Registration to the extent required by Section 5.01.



                                      22


<PAGE>



The Company will pay all Registration Expenses in connection with each
registration of Registrable Securities requested pursuant to this Section
5.02.

          (b) If a registration pursuant to this Section 5.02 involves a
Public Offering (other than in the case of a Public Offering requested by the
LLC or any of its Permitted Transferees or the Other Stockholders in a Demand
Registration, in which case the provisions with respect to priority of
inclusion in such offering set forth in Section 5.01(e) shall apply) and the
managing underwriter advises the Company that, in its view, the number of
Shares that the Company and such Stockholders intend to include in such
registration exceeds the Maximum Offering Size, the Company will include in
such registration, in the following priority, up to the Maximum Offering Size:

              (i) first, so much of the securities proposed to be registered by
         the Company as would not cause the offering to exceed the Maximum
         Offering Size;

             (ii) second, all Registrable Securities requested to be included in
         such registration by the LLC and its Permitted Transferees or any
         Other Stockholder pursuant to this Section 5.02 (allocated, if
         necessary for the offering not to exceed the Maximum Offering Size,
         pro rata among such Stockholders on the basis of the relative number
         of shares of Registrable Securities so requested to be included in
         such registration).

         SECTION 5.03. Holdback Agreements. If any registration of Registrable
Securities shall be in connection with a Public Offering, the LLC and its
Permitted Transferees and each Other Stockholder agrees not to effect any
public sale or distribution, including any sale pursuant to Rule 144, or any
successor provision, under the Securities Act, of any Registrable Securities,
and not to effect any such public sale or distribution of any other Common
Stock of the Company or of any stock convertible into or exchangeable or
exercisable for any Common Stock of the Company (in each case, other than as
part of such Public Offering) during the 14 days prior to the effective date
of such registration statement (except as part of such registration) or during
the period after such effective date equal to the lesser of (i) such period of
time as agreed between such managing underwriter and the Company and (ii) 180
days (such lesser period, the "Applicable Holdback Period").

         SECTION 5.04. Registration Procedures. Whenever Stockholders request
that any Registrable Securities be registered pursuant to Section 5.01 or
5.02, the Company will, subject to the provisions of such Sections, use its
best efforts to effect the registration and the sale of such Registrable
Securities in accordance



                                      23


<PAGE>



with the intended method of disposition thereof as quickly as practicable, and
in connection with any such request:

          (a) The Company will as expeditiously as possible prepare and file
with the SEC a registration statement on any form for which the Company then
qualifies or which counsel for the Company shall deem appropriate and which
form shall be available for the sale of the Registrable Securities to be
registered thereunder in accordance with the intended method of distribution
thereof, and use its best efforts to cause such filed registration statement
to become and remain effective for a period of not less than 180 days.

          (b) The Company will, if requested, prior to filing a registration
statement or prospectus or any amendment or supplement thereto, furnish to
participating Stockholder and each underwriter, if any, of the Registrable
Securities covered by such registration statement copies of such registration
statement as proposed to be filed, and thereafter the Company will furnish to
such Stockholder and underwriter, if any, such number of copies of such
registration statement, each amendment and supplement thereto (in each case
including all exhibits thereto and documents incorporated by reference
therein), the prospectus included in such registration statement (including
each preliminary prospectus) and such other documents as such Stockholder or
underwriter may reasonably request in order to facilitate the disposition of
the Registrable Securities owned by such Stockholder.

          (c) After the filing of the registration statement, the Company will
promptly notify each Stockholder holding Registrable Securities covered by
such registration statement of any stop order issued or threatened by the SEC
and take all reasonable actions required to prevent the entry of such stop
order or to remove it if entered.

          (d) The Company will use its best efforts to (i) register or qualify
the Registrable Securities covered by such registration statement under such
other securities or blue sky laws of such jurisdictions in the United States
as any Stockholder holding such Registrable Securities reasonably (in light of
such Stockholder's intended plan of distribution) requests and (ii) cause such
Registrable Securities to be registered with or approved by such other
governmental agencies or authorities as may be necessary by virtue of the
business and operations of the Company and do any and all other acts and
things that may be reasonably necessary or advisable to enable such
Stockholder to consummate the disposition of the Registrable Securities owned
by such Stockholder; provided that the Company will not be required to (A)
qualify generally to do business in any jurisdiction where it would not
otherwise be required to qualify but for this paragraph (d), (B) subject
itself to taxation in any



                                      24


<PAGE>



such jurisdiction or (C) consent to general service of process in any such
jurisdiction.

          (e) The Company will immediately notify each Stockholder holding
such Registrable Securities, at any time when a prospectus relating thereto is
required to be delivered under the Securities Act, of the occurrence of an
event requiring the preparation of a supplement or amendment to such
prospectus so that, as thereafter delivered to the purchasers of such
Registrable Securities, such prospectus will not contain an untrue statement
of a material fact or omit to state any material fact required to be stated
therein or necessary to make the statements therein not misleading and
promptly prepare and make available to each such Stockholder any such
supplement or amendment.

          (f) The LLC will have the right, in its sole discretion, to select
an underwriter or underwriters in connection with any Public Offering, which
underwriter or underwriters may include any Affiliate of any DLJ Entity. In
connection with any Public Offering, the Company will enter into customary
agreements (including an underwriting agreement in customary form) and take
such other actions as are reasonably required in order to expedite or
facilitate the disposition of Registrable Securities in any such Public
Offering, including the engagement of a "qualified independent underwriter" in
connection with the qualification of the underwriting arrangements with the
NASD.

          (g) Upon the execution of confidentiality agreements in form and
substance satisfactory to the Company, the Company will make available for
inspection by any Stockholder and any underwriter participating in any
disposition pursuant to a registration statement being filed by the Company
pursuant to this Section 5.04 and any attorney, accountant or other
professional retained by any such Stockholder or underwriter (collectively,
the "Inspectors"), all financial and other records, pertinent corporate
documents and properties of the Company (collectively, the "Records") as shall
be reasonably necessary to enable them to exercise their due diligence
responsibility, and cause the Company's officers, directors and employees to
supply all information reasonably requested by any Inspectors in connection
with such registration statement. Records that the Company determines, in good
faith, to be confidential and that it notifies the Inspectors are confidential
shall not be disclosed by the Inspectors unless (i) the disclosure of such
Records is necessary to avoid or correct a misstatement or omission in such
registration statement or (ii) the release of such Records is ordered pursuant
to a subpoena or other order from a court of competent jurisdiction. Each
Stockholder agrees that information obtained by it as a result of such
inspections shall be deemed confidential and shall not be used by it as the
basis for any market transactions in the Company Securities or its Affiliates
unless and until such is made generally available to the public. Each



                                      25


<PAGE>



Stockholder further agrees that it will, upon learning that disclosure of such
Records is sought in a court of competent jurisdiction, give notice to the
Company and allow the Company, at its expense, to undertake appropriate action
to prevent disclosure of the Records deemed confidential.

          (h) The Company will furnish to each such Stockholder and to each
such underwriter, if any, a signed counterpart, addressed to such underwriter,
of (i) an opinion or opinions of counsel to the Company and (ii) a comfort
letter or comfort letters from the Company's independent public accountants,
each in customary form and covering such matters of the type customarily
covered by opinions or comfort letters, as the case may be, as a majority of
such Stockholders or the managing underwriter therefor reasonably requests.

          (i) The Company will otherwise use its best efforts to comply with
all applicable rules and regulations of the SEC, and make available to its
stockholders, as soon as reasonably practicable, an earnings statement
covering a period of 12 months, beginning within three months after the
effective date of the registration statement, which earnings statement shall
satisfy the provisions of Section 11(a) of the Securities Act.

         The Company may require each such Stockholder to promptly furnish in
writing to the Company such information regarding the distribution of the
Registrable Securities as the Company may from time to time reasonably request
and such other information as may be legally required in connection with such
registration.

         Each such Stockholder agrees that, upon receipt of any notice from
the Company of the happening of any event of the kind described in Section
5.04(e), such Stockholder will forthwith discontinue disposition of
Registrable Securities pursuant to the registration statement covering such
Registrable Securities until such Stockholder's receipt of the copies of the
supplemented or amended prospectus contemplated by Section 5.04(e), and, if so
directed by the Company, such Stockholder will deliver to the Company all
copies, other than any permanent file copies then in such Stockholder's
possession, of the most recent prospectus covering such Registrable Securities
at the time of receipt of such notice. In the event that the Company shall
give such notice, the Company shall extend the period during which such
registration statement shall be maintained effective (including the period
referred to in Section 5.04(a)) by the number of days during the period from
and including the date of the giving of notice pursuant to Section 5.04(e) to
the date when the Company shall make available to such Stockholder a
prospectus supplemented or amended to conform with the requirements of Section
5.04(e).



                                      26


<PAGE>



         SECTION 5.05. Indemnification by the Company. The Company agrees to
indemnify and hold harmless each Stockholder holding Registrable Securities
covered by a registration statement, its officers, directors and agents, and
each person, if any, who controls such Stockholder within the meaning of
Section 15 of the Securities Act or Section 20 of the Exchange Act from and
against any and all losses, claims, damages and liabilities caused by any
untrue statement or alleged untrue statement of a material fact contained in
any registration statement or prospectus relating to the Registrable
Securities (as amended or supplemented if the Company shall have furnished any
amendments or supplements thereto) or any preliminary prospectus, or caused by
any omission or alleged omission to state therein a material fact required to
be stated therein or necessary to make the statements therein not misleading,
except insofar as such losses, claims, damages or liabilities are caused by
any such untrue statement or omission or alleged untrue statement or omission
based upon information furnished in writing to the Company by such Stockholder
or on such Stockholder's behalf expressly for use therein; provided that with
respect to any untrue statement or omission or alleged untrue statement or
omission made in any preliminary prospectus, or in any prospectus, as the case
may be, the indemnity agreement contained in this paragraph shall not apply to
the extent that any such loss, claim, damage, liability or expense results
from the fact that a current copy of the prospectus (or, in the case of a
prospectus, the prospectus as amended or supplemented) was not sent or given
to the person asserting any such loss, claim, damage, liability or expense at
or prior to the written confirmation of the sale of the Registrable Securities
concerned to such person if it is determined that the Company has provided
such prospectus and it was the responsibility of such Stockholder to provide
such person with a current copy of the prospectus (or such amended or
supplemented prospectus, as the case may be) and such current copy of the
prospectus (or such amended or supplemented prospectus, as the case may be)
would have cured the defect giving rise to such loss, claim, damage, liability
or expense. The Company also agrees to indemnify any underwriters of the
Registrable Securities, their officers and directors and each person who
controls such underwriters on substantially the same basis as that of the
indemnification of the Stockholders provided in this Section 5.05.

         SECTION 5.06. Indemnification by Participating Stockholders. Each
Stockholder holding Registrable Securities included in any registration
statement agrees, severally but not jointly, to indemnify and hold harmless
the Company, its officers, directors and agents and each person, if any, who
controls the Company within the meaning of either Section 15 of the Securities
Act or Section 20 of the Exchange Act to the same extent as the foregoing
indemnity from the Company to such Stockholder, but only (i) with respect to
information furnished in writing by such Stockholder or on such Stockholder's
behalf expressly for use in any registration statement or prospectus relating
to the Registrable Securities, or any



                                      27


<PAGE>



amendment or supplement thereto, or any preliminary prospectus or (ii) to the
extent that any loss, claim, damage, liability or expense described in Section
5.05 results from the fact that a current copy of the prospectus (or, in the
case of a prospectus, the prospectus as amended or supplemented) was not sent
or given to the person asserting any such loss, claim, damage, liability or
expense at or prior to the written confirmation of the sale of the Registrable
Securities concerned to such person if it is determined that it was the
responsibility of such Stockholder to provide such person with a current copy
of the prospectus (or such amended or supplemented prospectus, as the case may
be) and such current copy of the prospectus (or such amended or supplemented
prospectus, as the case may be) would have cured the defect giving rise to
such loss, claim, damage, liability or expense. Each such Stockholder also
agrees to indemnify and hold harmless underwriters of the Registrable
Securities, their officers and directors and each person who controls such
underwriters on substantially the same basis as that of the indemnification of
the Company provided in this Section 5.06. As a condition to including
Registrable Securities in any registration statement filed in accordance with
Article 5 hereof, the Company may require that it shall have received an
undertaking reasonably satisfactory to it from any underwriter to indemnify
and hold it harmless to the extent customarily provided by underwriters with
respect to similar securities.

         SECTION 5.07. Conduct of Indemnification Proceedings. In case any
proceeding (including any governmental investigation) shall be instituted
involving any person in respect of which indemnity may be sought pursuant to
this Article 5, such person (an "Indemnified Party") shall promptly notify the
person against whom such indemnity may be sought (the "Indemnifying Party") in
writing and the Indemnifying Party shall assume the defense thereof, including
the employment of counsel reasonably satisfactory to such Indemnified Party,
and shall assume the payment of all fees and expenses; provided that the
failure of any Indemnified Party so to notify the Indemnifying Party shall not
relieve the Indemnifying Party of its obligations hereunder except to the
extent that the Indemnifying Party is materially prejudiced by such failure to
notify. In any such proceeding, any Indemnified Party shall have the right to
retain its own counsel, but the fees and expenses of such counsel shall be at
the expense of such Indemnified Party unless (i) the Indemnifying Party and
the Indemnified Party shall have mutually agreed to the retention of such
counsel or (ii) in the reasonable judgment of such Indemnified Party
representation of both parties by the same counsel would be inappropriate due
to actual or potential differing interests between them. It is understood that
the Indemnifying Party shall not, in connection with any proceeding or related
proceedings in the same jurisdiction, be liable for the reasonable fees and
expenses of more than one separate firm of attorneys (in addition to any local
counsel) at any time for all such Indemnified Parties, and that all such fees
and expenses shall be reimbursed as they are



                                      28


<PAGE>



incurred. In the case of any such separate firm for the Indemnified Parties,
such firm shall be designated in writing by the Indemnified Parties. The
Indemnifying Party shall not be liable for any settlement of any proceeding
effected without its written consent, but if settled with such consent, or if
there be a final judgment for the plaintiff, the Indemnifying Party shall
indemnify and hold harmless such Indemnified Parties from and against any loss
or liability (to the extent stated above) by reason of such settlement or
judgment. No Indemnifying Party shall, without the prior written consent of
the Indemnified Party, effect any settlement of any pending or threatened
proceeding in respect of which any Indemnified Party is or could have been a
party and indemnity could have been sought hereunder by such Indemnified
Party, unless such settlement includes an unconditional release of such
Indemnified Party from all liability arising out of such proceeding.

         SECTION 5.08. Contribution. If the indemnification provided for in
this Article 5 is unavailable to the Indemnified Parties in respect of any
losses, claims, damages or liabilities referred to herein, then each such
Indemnifying Party, in lieu of indemnifying such Indemnified Party, shall
contribute to the amount paid or payable by such Indemnified Party as a result
of such losses, claims, damages or liabilities (i) as between the Company and
the Stockholders holding Registrable Securities covered by a registration
statement on the one hand and the underwriters on the other, in such
proportion as is appropriate to reflect the relative benefits received by the
Company and such Stockholders on the one hand and the underwriters on the
other, from the offering of the Registrable Securities, or if such allocation
is not permitted by applicable law, in such proportion as is appropriate to
reflect not only the relative benefits but also the relative fault of the
Company and such Stockholders on the one hand and of such underwriters on the
other in connection with the statements or omissions which resulted in such
losses, claims, damages or liabilities, as well as any other relevant
equitable considerations and (ii) as between the Company on the one hand and
each such Stockholder on the other, in such proportion as is appropriate to
reflect the relative fault of the Company and of each such Stockholder in
connection with such statements or omissions, as well as any other relevant
equitable considerations. The relative benefits received by the Company and
such Stockholders on the one hand and such underwriters on the other shall be
deemed to be in the same proportion as the total proceeds from the offering
(net of underwriting discounts and commissions but before deducting expenses)
received by the Company and such Stockholders bear to the total underwriting
discounts and commissions received by such underwriters, in each case as set
forth in the table on the cover page of the prospectus. The relative fault of
the Company and such Stockholders on the one hand and of such underwriters on
the other shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact



                                      29


<PAGE>



relates to information supplied by the Company and such Stockholders or by
such underwriters. The relative fault of the Company on the one hand and of
each such Stockholder on the other shall be determined by reference to, among
other things, whether the untrue or alleged untrue statement of a material
fact or the omission or alleged omission to state a material fact relates to
information supplied by such party, and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission.

         The Company and the Stockholders agree that it would not be just and
equitable if contribution pursuant to this Section 5.08 were determined by pro
rata allocation (even if the underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take account of
the equitable considerations referred to in the immediately preceding
paragraph. The amount paid or payable by an Indemnified Party as a result of
the losses, claims, damages or liabilities referred to in the immediately
preceding paragraph shall be deemed to include, subject to the limitations set
forth above, any legal or other expenses reasonably incurred by such
Indemnified Party in connection with investigating or defending any such
action or claim. Notwithstanding the provisions of this Section 5.08, no
underwriter shall be required to contribute any amount in excess of the amount
by which the total price at which the Registrable Securities underwritten by
it and distributed to the public were offered to the public exceeds the amount
of any damages which such underwriter has otherwise been required to pay by
reason of such untrue or alleged untrue statement or omission or alleged
omission, and no Stockholder shall be required to contribute any amount in
excess of the amount by which the total price at which the Registrable
Securities of such Stockholder were offered to the public exceeds the amount
of any damages which such Stockholder has otherwise been required to pay by
reason of such untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation. Each such
Stockholder's obligation to contribute pursuant to this Section 5.08 is
several in the proportion that the proceeds of the offering received by such
Stockholder bears to the total proceeds of the offering received by all such
Stockholders and not joint.

         SECTION 5.09. Participation in Public Offering. No Person may
participate in any Public Offering hereunder unless such Person (a) agrees to
sell such Person's securities on the basis provided in any underwriting
arrangements approved by the Persons entitled hereunder to approve such
arrangements, and (b) completes and executes all questionnaires, powers of
attorney, indemnities, underwriting agreements and other documents reasonably
and customarily required under the terms of such underwriting arrangements and
the provisions of this Agreement in respect of registration rights.



                                      30


<PAGE>



         SECTION 5.10. Other Indemnification. Indemnification similar to that
specified herein (with appropriate modifications) shall be given by the
Company and each Stockholder participating therein with respect to any
required registration or other qualification of securities under any federal
or state law or regulation or governmental authority other than the Securities
Act.

         SECTION 5.11. Cooperation by the Company. In the event any
Stockholder shall transfer any Registrable Securities pursuant to Rule 144A
under the Securities Act, the Company shall cooperate with such Stockholder
(which shall include, without limitation, making registration rights with
respect to the Registrable Securities to be sold (or securities issuable or to
be issued in exchange therefor) available to the ultimate purchasers thereof)
and shall provide to such Stockholder such information as such Stockholder
shall reasonably request, provided that any registration rights made available
pursuant hereto shall not be on terms substantially more favorable to the
possessors thereof than the registration rights granted herein to the LLC.


                                   ARTICLE 6
                                 MISCELLANEOUS

         SECTION 6.01. Entire Agreement. This Agreement constitutes the entire
agreement among the parties hereto and supersede all prior agreements and
understandings, oral and written, among the parties hereto with respect to the
subject matter hereof.

         SECTION 6.02. Binding Effect; Benefit; Treatment of TCW Entities. (a)
This Agreement shall inure to the benefit of and be binding upon the parties
hereto and their respective heirs, successors, legal representatives and
permitted assigns. Nothing in this Agreement, expressed or implied, shall
confer on any Person other than the parties hereto, their respective heirs,
successors, legal representatives and permitted assigns, the DLJ Entities, and
DLJ Merchant Banking II, Inc., any rights, remedies, obligations or
liabilities under or by reason of this Agreement.

         (b) It is acknowledged and understood by all parties hereto that this
agreement shall be binding in the absence of executed counterparts from the
TCW Entities. It is further understood that if the TCW Entities do not deliver
executed counterparts to the Company within 30 days from the Closing Date, all
references herein to the TCW Entities shall be deemed to be removed without
any further action on the part of any party hereto.



                                      31


<PAGE>



         SECTION 6.03. Exclusive Financial and Investment Banking Advisor.
During the period from and including the date hereof through and including the
fifth anniversary of the date hereof, Donaldson, Lufkin & Jenrette Securities
Corporation ("DLJSC"), or any Affiliate of DLJSC that the LLC may choose in
its sole discretion, shall be engaged as the exclusive financial and
investment banking advisor of the Company.

         SECTION 6.04. Put Right. (a) During the period, if any, beginning on
(i) the earlier of (A) the date that all of the Indebtedness (as defined in,
and for the purposes hereof such term shall include, the Subordinated Discount
Note Due 2010 issued by the Company to CRL Holdings, Inc.) of the Company and
its subsidiaries incurred on or prior to the Closing Date has been repaid in
full (including any refinancings or replacements of such Indebtedness) or (B)
the date that (1) all of the Indebtedness of the Company and its subsidiaries
incurred on or prior to the Closing Date has been repaid in full, refinanced
or replaced and (2) the documentation relating to all of the refinanced or
replacement Indebtedness referred to in the preceding clause (A) permits the
Put (as defined below) to be exercised, provided that in connection with any
refinancing or replacement referred to in the preceding clause (A) the Company
shall make a good faith effort to obtain such permission in the documentation
thereof, and ending on (ii) the earliest of (X) the date of the Initial Public
Offering, (Y) the date on which the LLC shall own less than 50% of the
outstanding Common Stock, and (Z) twelve years from the Closing Date, CRL
shall have the right to sell (the "Put") all, but not less than all, of the
Common Stock owned by it (excluding any Common Stock acquired by it after the
Closing Date) to the Company. The price per share for the Common Stock
purchased pursuant to the Put shall be the fair market value thereof as
determined by an investment bank of nationally recognized standing selected by
the Board, which shall not be an affiliate of the LLC or the DLJ Entities.

          (b) In the event that CRL proposes to exercise its rights under this
section, it shall provide the Company with written notice thereof (the
"Section 6.04 Notice"). The Company shall then have 75 days from the date of
its receipt of the Section 6.04 Notice in which to obtain the determination of
the price per share set forth in clause (a) above, and to provide written
notice to CRL of such price per share (the "Value Notice"). CRL shall then
have 10 Business Days from the date of its receipt of the Value Notice in
which it may provide written notice to the Company of its intention to
exercise the Put (the "Put Notice"). If CRL does not provide the Put Notice to
the Company within such 10 day period, it shall forfeit all its rights under
this Section 6.04. If CRL does provide the Put Notice to the Company within
such 10 day period: (i) the Company shall deliver to CRL the price per share
set forth in the Value Notice for the Common Stock to be sold by CRL, and (ii)
CRL shall simultaneously deliver to the Company



                                      32


<PAGE>



certificates representing such Common Stock, together with duly executed stock
powers, on a date to be determined by mutual agreement (but not less than 10
days after the date of the Company's receipt of the Put Notice).

         SECTION 6.05. Pre-emptive Rights. (a) If the Company proposes to
issue any Company Securities (other than (i) to employees of the Company or
any subsidiary pursuant to employee benefit plans or arrangements approved by
the Board (including upon the exercise of employee stock options), (ii) in
connection with any bona fide, arm's length direct or indirect merger,
acquisition or similar transaction, (iii) pursuant to a Public Offering, (iv)
upon the exercise of Warrants or High Yield Warrants, or (v) on or prior to
the Closing Date), each Other Stockholder shall have the pre-emptive right to
acquire its pre-emptive portion of such Company Securities, at the same price
per Company Security at which such Company Securities are sold in such
issuance. For these purposes, "pre-emptive portion" shall mean a fraction, the
numerator of which is the Initial Ownership of such Stockholder and the
denominator of which is the Initial Ownership of all Stockholders.

          (b) The Company shall provide written notice to each Other
Stockholder at least twenty days prior to any issuance of Company Securities
with respect to which such Other Stockholder would have pre-emptive rights
pursuant to clause (a) above. Each Other Stockholder shall then have ten days
from its receipt of such notice in which to provide written notice to the
Company of its exercise of its rights pursuant to this Section 6.05.

          (c) The rights of any Other Stockholder under this Section 6.05
shall expire at such time as such Other Stockholder owns less than 40% of its
Initial Ownership of Common Stock.

         (d) The Company shall not be under any obligation to consummate any
proposed issuance of Company Securities, regardless of whether it shall have
delivered a written notice in respect of such issuance.

         SECTION 6.06. Assignability. This Agreement shall not be assignable
by any party hereto, except that any Person acquiring Shares who is required
by the terms of this Agreement or any employment agreement or stock purchase,
option, stock option or other compensation plan of the Company or any
Subsidiary to become a party hereto shall (unless already bound hereby)
execute and deliver to the Company an agreement to be bound by this Agreement
and shall thenceforth be a "Stockholder". Any Stockholder who ceases to own
beneficially any Shares shall cease to be bound by the terms hereof (other
than the provisions of Sections 5.05, 5.06, 5.07, 5.08, and 5.10 applicable to
such Stockholder with respect to any



                                      33


<PAGE>



offering of Registrable Securities completed before the date such Stockholder
ceased to own any Shares).

         SECTION 6.07. Amendment; Waiver; Termination. No provision of this
Agreement may be waived except by an instrument in writing executed by the
party against whom the waiver is to be effective. No provision of this
Agreement may be amended or otherwise modified except by an instrument in
writing executed by (i) the Company with the approval of the Board, (ii) DLJ
Merchant Banking II, Inc., and (iii) CRL, until such time as CRL is no longer
entitled to nominate a director to the Board; provided that if any such
amendment or modification has an adverse effect on any Stockholder that is
materially disproportionate to the effect of such amendment or modification on
Stockholders generally, the approval of such Stockholder shall also be
required.

         SECTION 6.08.  Notices.  All notices, requests and other communications
to any party hereunder shall be in writing (including facsimile transmissions
and shall be given,

         if to the Company or the Management Stockholders, to

                  Charles River Laboratories Holdings, Inc.
                  251 Ballardvale Street
                  Wilmington, MA 01887
                  Attention: Dennis R. Shaughnessy
                  Fax: (978) 988-5665

         and a copy to the LLC at its address listed below;

         if to the LLC, to:

                  CRL Acquisition LLC
                  c/o DLJ Merchant Banking Partners II, L.P.
                  277 Park Avenue
                  New York, New York 10172
                  Attention: Thompson Dean
                  Fax:  (212) 892-7272

         with a copy to:



                                      34



<PAGE>



                  Davis Polk & Wardwell
                  450 Lexington Avenue
                  New York, New York  10017

                           Attention:  George R. Bason, Jr.
                           Fax:  (212) 450-4800

         if to CRL, to:

                  B&L CRL, Inc.
                  c/o Bausch & Lomb Incorporated
                  One Bausch & Lomb Place
                  Rochester, NY 14604

                           Attention: Alan Farnsworth
                           Fax: 716-338-8017

         with a copy to:

                           Nixon Peabody LLP
                           Clinton Square
                           Rochester, NY 14603
                           Attention: Deborah McLean Quinn
                           Fax: (716) 263-1600

         if to DLJ Investment Partners, L.P., to:

                           DLJ Investment Partners, L.P.
                           277 Park Avenue
                           New York, NY 10172
                           Attention: Ivy Dodes
                           Fax: 212-892-7272

         if to DLJ Investment Funding, Inc.,  to:

                           DLJ Investment Funding, Inc.
                           277 Park Avenue
                           New York, NY 10172
                           Attention: John Moriarty
                           Fax: 212-892-7555

         if to DLJ ESC II, L.P., to:



                                      35



<PAGE>



                           DLJ ESC II L.P.
                           c/o DLJ LBO Plans
                            Management Corporation
                           277 Park Avenue
                           New York, NY 10172
                           Attention: John Moriarty
                           Fax: 212-892-7555

         if to BB, to:

                  Brown Brothers Harriman & Co.
                  59 Wall Street
                  New York, NY 10005

                           Attention: Joseph P. Donlan
                           Fax: 212-493-8429

         with a copy to:

                  Paul Weiss Rifkind Wharton & Garrison
                  1285 Avenue of the Americas
                  New York, NY 10019-6064

                           Attention: Marilyn Sobel
                           Fax: 212-757-3990

if to Carlyle, to:

                  Carlyle Group L.P.
                  520 Madison Avenue
                  41st Floor
                  New York, NY 10022

                           Attention: Mr. Mark Alter
                           Fax: 212-381-4950

if to the TCW Entities, to:

                  Trust Company of the West
                  11100 Santa Monica Blvd.
                  Suite 2000
                  Los Angeles, CA 90025



                                      36


<PAGE>




                           Attention: Mr. Jim Shevlet
                           Fax: 310-235-5967


         All notices, requests and other communications shall be deemed
received on the date of receipt by the recipient thereof if received prior to
5 p.m. in the place of receipt and such day is a business day in the place of
receipt. Otherwise, any such notice, request or communication shall be deemed
not to have been received until the next succeeding business day in the place
of receipt. Any notice, request or other written communication sent by
facsimile transmission shall be confirmed by certified mail, return receipt
requested, posted within one Business Day, or by personal delivery, whether
courier or otherwise, made within two Business Days after the date of such
facsimile transmission.

         Any Person who becomes a Stockholder shall provide its address and
fax number to the Company, which shall promptly provide such information to
each other Stockholder.

         SECTION 6.09.  Headings.  The headings contained in this Agreement are
for convenience only and shall not affect the meaning or interpretation of this
Agreement.

         SECTION 6.10.  Counterparts.  This Agreement may be executed in any
number of counterparts, each of which shall be deemed to be an original and all
of which together shall be deemed to be one and the same instrument.

         SECTION 6.11.  Applicable Law.  THIS AGREEMENT SHALL BE GOVERNED BY,
AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF DELAWARE WITHOUT
REGARD TO THE CONFLICTS OF LAW RULES OF SUCH STATE.

         SECTION 6.12. Specific Enforcement. Each party hereto acknowledges
that the remedies at law of the other parties for a breach or threatened
breach of this Agreement would be inadequate and, in recognition of this fact,
any party to this Agreement, without posting any bond, and in addition to all
other remedies which may be available, shall be entitled to obtain equitable
relief in the form of specific performance, a temporary restraining order, a
temporary or permanent injunction or any other equitable remedy which may then
be available.

         SECTION 6.13.  Consent to Jurisdiction.  Any suit, action or proceeding
seeking to enforce any provision of, or based on any matter arising out of or in
connection with, this Agreement or the transactions contemplated hereby may be



                                      37


<PAGE>



brought in the United States District Court for the Southern District of New
York or any other New York State court sitting in New York City, and each of
the parties hereby consents to the non-exclusive jurisdiction of such courts
(and of the appropriate appellate courts therefrom) in any such suit, action
or proceeding and irrevocably waives, to the fullest extent permitted by law,
any objection which it may now or hereafter have to the laying of the venue of
any such suit, action or proceeding in any such court or that any such suit,
action or proceeding which is brought in any such court has been brought in an
inconvenient forum. Process in any such suit, action or proceeding may be
served on any party anywhere in the world, whether within or without the
jurisdiction of any such court. Without limiting the foregoing, each party
agrees that service of process on such party as provided in Section 6.08 shall
be deemed effective service of process on such party.



                                      38


<PAGE>



         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as of the day and year first above written.



                                           CHARLES RIVER LABORATORIES
                                           HOLDINGS, INC.


                                           By:
                                             ---------------------------------
                                             Name:
                                             Title:



                                           CRL ACQUISITION LLC


                                           By:
                                             ---------------------------------
                                             Name:
                                             Title:



                                           B&L CRL, INC.


                                           By:
                                             ---------------------------------
                                             Name:
                                             Title:



                                           DLJ INVESTMENT PARTNERS, L.P.


                                           By: DLJ INVESTMENT PARTNERS, INC.,
                                               Managing General Partner


                                           By:
                                             ---------------------------------
                                             Name:
                                             Title:



                                      39



<PAGE>


                                           DLJ ESC II L.P.


                                           By: DLJ LBO PLANS MANAGEMENT
                                               CORPORATION,
                                               General Partner


                                           By:
                                             ---------------------------------
                                             Name:
                                             Title:



                                           DLJ INVESTMENT FUNDING, INC.


                                           By:
                                             ---------------------------------
                                             Name:
                                             Title:



                                           THE 1818 MEZZANINE FUND, L.P.


                                           By: BROWN BROTHERS HARRIMAN & CO.
                                               General Partner


                                           By:
                                             ---------------------------------
                                             Name:
                                             Title:



                                           CARLYLE HIGH YIELD PARTNERS, L.P.


                                           By: TCG High Yield, L.L.C.
                                               General Partner


                                           By:
                                             ---------------------------------
                                             Name: Jack Mann
                                             Title: Executive Managing Director



                                      40



<PAGE>



                                       MANAGEMENT STOCKHOLDERS


                                       -----------------------------------------
                                       James C. Foster



                                       -----------------------------------------
                                       Henry L. Foster



                                       -----------------------------------------
                                       Thomas F. Ackerman



                                       -----------------------------------------
                                       Dennis R. Shaughnessy



                                       -----------------------------------------
                                       Julia D. Palm



                                       -----------------------------------------
                                       Real H. Renaud



                                       -----------------------------------------
                                       Gilbert M. Slater



                                       -----------------------------------------
                                       David P. Johst



                                       -----------------------------------------
                                       Dr. Charn Sun Lee



                                       -----------------------------------------
                                       Dr. Jorg M. Geller


                                      41



<PAGE>



                                       -----------------------------------------
                                       Dr. Christophe Berthoux



                                       -----------------------------------------
                                       Dr. Raj Bhalla



                                       -----------------------------------------
                                       Toshihide Kashiwagi



                                      42



<PAGE>



                                       TCW/CRESCENT MEZZANINE PARTNERS II, L.P.



                                       By: TCW/Crescent Mezzanine II, L.P.
                                           its general partner or managing owner


                                       By: TCW/Crescent Mezzanine, L.L.C.
                                           its general partner


                                       By:
                                          --------------------------------------
                                          Name:
                                          Title:



                                       TCW/CRESCENT MEZZANINE TRUST II


                                       By: TCW/Crescent Mezzanine II, L.P.
                                           its general partner or managing owner


                                       By: TCW/Crescent Mezzanine, L.L.C.
                                           its general partner


                                       By:
                                          --------------------------------------
                                          Name:
                                          Title:



                                       CRESCENT/MACH I PARTNERS, L.P.


                                       By: TCW Asset Management Company,
                                           as Portfolio Manager and as
                                           Attorney-in-Fact for the Partnership


                                       By:
                                          --------------------------------------
                                          Name:
                                          Title:



                                      43



<PAGE>



                                       TCW LEVERAGED INCOME TRUST, L.P.


                                       By: TCW Investment Management Company,
                                           as Investment Advisor


                                       By:
                                          --------------------------------------
                                          Name:
                                          Title:


                                       By: TCW Advisors (Bermuda), Ltd.,
                                           as general partner


                                       By:
                                          --------------------------------------
                                          Name:
                                          Title:



                                       TCW LEVERAGED INCOME TRUST II, L.P.


                                       By: TCW Investment Management Company,
                                            as Investment Advisor


                                       By:
                                          --------------------------------------
                                          Name:
                                         Title:


                                       By: TCW (LINC II), L.P., as general
                                           partner


                                       By: TCW Advisors (Bermuda), Ltd.,
                                           as its general partner


                                       By:
                                          --------------------------------------
                                          Name:
                                          Title:



                                      44



                                                            EXHIBIT 4.2

===============================================================================











                       CHARLES RIVER LABORATORIES, INC.

                  13 1/2% SENIOR SUBORDINATED NOTES DUE 2009


                 Guaranteed to the extent set forth herein by

                              SBI HOLDINGS, INC.
                            SIERRA BIOMEDICAL, INC.
                       SIERRA BIOMEDICAL SAN DIEGO, INC.


                          ---------------------------

                                   INDENTURE

                        Dated as of September 29, 1999

                          ---------------------------

                      STATE STREET BANK AND TRUST COMPANY

                                    TRUSTEE

                          ---------------------------











===============================================================================


<PAGE>




                            CROSS-REFERENCE TABLE*

Trust Indenture Act Section                                   Indenture Section

310 (a)(1)...............................................................7.10
(a)(2) ..................................................................7.10
(a)(3)...................................................................N.A.
(a)(4)...................................................................N.A.
(a)(5)...................................................................7.10
(b)......................................................................7.10
(c)......................................................................N.A.
311(a)...................................................................7.11
(b)......................................................................7.11
(c)......................................................................N.A.
312 (a)..................................................................2.05
(b).....................................................................11.03
(c).....................................................................10.03
313(a)...................................................................7.06
(b)(1)...................................................................N.A.
(b)(2)..................................................................7.06;
                                                                         7.07
(c).....................................................................7.06;
                                                                        11.02
(d)......................................................................7.06
314(a)..................................................................11.05
(b)......................................................................N.A.
(c)(1)..................................................................11.04
(c)(2)..................................................................11.04
(c)(3)...................................................................N.A.
(d)......................................................................N.A.
(e).....................................................................11.05
(f)......................................................................N.A.
315 (a)..................................................................7.01
(b).....................................................................7.05;
                                                                        10.02
(c)......................................................................7.01
(d)......................................................................7.01
(e)......................................................................6.11
316 (a)(last sentence)...................................................2.09
(a)(1)(A)................................................................6.05
(a)(1)(B)................................................................6.04
(a)(2)...................................................................N.A.
(b)......................................................................6.07
(c)......................................................................2.12
317 (a)(1)...............................................................6.08
(a)(2)...................................................................6.09
(b)......................................................................2.04
318 (a).................................................................10.01
(b)......................................................................N.A.
(c).....................................................................10.01
N.A. means not applicable.
*This Cross-Reference Table is not part of the Indenture.

                                      2


<PAGE>


                               TABLE OF CONTENTS
                               -----------------
                                                                           Page
                                                                           ----

ARTICLE 1DEFINITIONS AND INCORPORATION BY REFERENCE............................2
       Section 1.01    Definitions.............................................2
       Section 1.02    Other Definitions......................................22
       Section 1.03    Incorporation of TIA Provisions........................23
       Section 1.04    Rules of Construction..................................23


ARTICLE 2THE NOTES............................................................24
       Section 2.01    Form and Dating........................................24
       Section 2.02    Execution and Authentication...........................25
       Section 2.03    Registrar and Paying Agent.............................25
       Section 2.04    Paying Agent to Hold Money in Trust....................26
       Section 2.05    Holder Lists...........................................26
       Section 2.06    Transfer and Exchange..................................26
       Section 2.07    Replacement Notes......................................38
       Section 2.08    Outstanding Notes......................................38
       Section 2.09    Treasury Notes.........................................39
       Section 2.10    Temporary Notes........................................39
       Section 2.11    Cancellation...........................................39
       Section 2.12    Defaulted Interest.....................................39


ARTICLE 3REDEMPTION AND PREPAYMENT............................................40
       Section 3.01    Notices to Trustee.....................................40
       Section 3.02    Selection of Notes to Be Redeemed......................40
       Section 3.03    Notice of Redemption...................................40
       Section 3.04    Effect of Notice of Redemption.........................41
       Section 3.05    Deposit of Redemption Price............................41
       Section 3.06    Notes Redeemed in Part.................................41
       Section 3.07    Optional Redemption....................................42
       Section 3.08    Mandatory Redemption...................................42
       Section 3.09    Offer to Purchase by Application of Excess Proceeds....42


ARTICLE 4COVENANTS............................................................44
       Section 4.0     Payment of Notes.......................................44
       Section 4.02    Maintenance of Office or Agency........................44
       Section 4.03    Reports................................................45
       Section 4.04    Compliance Certificate.................................45
       Section 4.05    Taxes..................................................46
       Section 4.06    Stay, Extension and Usury Laws.........................46
       Section 4.07    Restricted Payments....................................46
       Section 4.08    Dividend and Other Payment Restrictions Affecting
                         Subsidiaries.........................................50

                                      i


<PAGE>


       Section 4.09    Incurrence of Indebtedness and Issuance of Preferred
                         Stock................................................51
       Section 4.10    Asset Sales............................................53
       Section 4.11    Transactions with Affiliates...........................54
       Section 4.12    Liens..................................................55
       Section 4.13    Corporate Existence....................................55
       Section 4.14    Offer to Repurchase Upon Change of Control.............55
       Section 4.15    No Senior Subordinated Indebtedness....................56
       Section 4.16    Limitation on Sale and Leaseback Transactions..........56
       Section 4.17    Additional Note Guarantees.............................57


ARTICLE 5SUCCESSORS...........................................................57
       Section 5.01    Merger, Consolidation, or Sale of Assets...............57
       Section 5.02    Successor Corporation Substituted......................58


ARTICLE 6DEFAULTS AND REMEDIES................................................58
       Section 6.01    Events of Default......................................58
       Section 6.02    Acceleration...........................................59
       Section 6.03    Other Remedies.........................................60
       Section 6.04    Waiver of Past Defaults................................60
       Section 6.05    Control by Majority....................................61
       Section 6.06    Limitation on Suits....................................61
       Section 6.07    Rights of Holders of Notes to Receive Payment..........61
       Section 6.08    Collection Suit by Trustee.............................61
       Section 6.09    Trustee May File Proofs of Claim.......................62
       Section 6.10    Priorities.............................................62
       Section 6.11    Undertaking for Costs..................................62


ARTICLE 7TRUSTEE..............................................................63
       Section 7.01    Duties of Trustee......................................63
       Section 7.02    Rights of Trustee......................................64
       Section 7.03    Individual Rights of Trustee...........................65
       Section 7.04    Trustee's Disclaimer...................................65
       Section 7.05    Notice of Defaults.....................................65
       Section 7.06    Reports by Trustee to Holders of the Notes.............65
       Section 7.07    Compensation and Indemnity.............................65
       Section 7.08    Replacement of Trustee.................................66
       Section 7.09    Successor Trustee by Merger, etc.......................67
       Section 7.10    Eligibility; Disqualification..........................67
       Section 7.11    Preferential Collection of Claims Against Company......67


ARTICLE 8LEGAL DEFEASANCE AND COVENANT DEFEASANCE.............................68
       Section 8.01    Option to Effect Legal Defeasance or Covenant
                         Defeasance...........................................68
       Section 8.02    Legal Defeasance and Discharge.........................68
       Section 8.03    Covenant Defeasance....................................68

                                      ii


<PAGE>


       Section 8.04    Conditions to Legal or Covenant Defeasance.............69
       Section 8.05    Deposited Money and Government Securities to be Held
                         in Trust; Other Miscellaneous Provisions.............70
       Section 8.06    Repayment to Company...................................70
       Section 8.07    Reinstatement..........................................71


ARTICLE 9AMENDMENT, SUPPLEMENT AND WAIVER.....................................71
       Section 9.01    Without Consent of Holders of Notes....................71
       Section 9.02    With Consent of Holders of Notes.......................72
       Section 9.03    Compliance with Trust Indenture Act....................73
       Section 9.04    Revocation and Effect of Consents......................73
       Section 9.05    Notation on or Exchange of Notes.......................73
       Section 9.06    Trustee to Sign Amendments, etc........................74


ARTICLE 10SUBORDINATION.......................................................74
       Section 10.01   Agreement to Subordinate...............................74
       Section 10.02   Certain Definitions....................................74
       Section 10.03   Liquidation; Dissolution; Bankruptcy...................75
       Section 10.04   Default on Designated Senior Indebtedness..............75
       Section 10.05   Acceleration of Securities.............................76
       Section 10.06   When Distribution Must Be Paid Over....................76
       Section 10.07   Notice by Company......................................76
       Section 10.08   Subrogation............................................77
       Section 10.09   Relative Rights........................................77
       Section 10.10   Subordination May Not Be Impaired by Company...........77
       Section 10.11   Distribution or Notice to Representative...............77
       Section 10.12   Rights of Trustee and Paying Agent.....................78
       Section 10.13   Authorization to Effect Subordination..................78
       Section 10.14   No Waiver of Subordination Provisions..................78
       Section 10.15   Amendments.............................................78
       Section 10.16   Trustee's Compensation not Prejudiced..................79


ARTICLE 11NOTE GUARANTEES.....................................................79
       Section 11.01   Guarantee..............................................79
       Section 11.02   Subordination of Note Guarantee........................80
       Section 11.03   Limitation of Guarantor Liability......................80
       Section 11.04   Execution And Delivery Of Note Guarantee...............80
       Section 11.05   Guarantors May Consolidate, Etc., On Certain Terms.....81
       Section 11.06   Releases Following Sale Of Assets......................81


ARTICLE 12MISCELLANEOUS.......................................................82
       Section 12.01   Trust Indenture Act Controls...........................82
       Section 12.02   Notices................................................82
       Section 12.03   Communication by Holders of Notes with Other Holders
                         of Notes.............................................83

                                      iii


<PAGE>


       Section 12.04   Certificate and Opinion as to Conditions Precedent.....83
       Section 12.05   Statements Required in Certificate or Opinion..........83
       Section 12.06   Rules by Trustee and Agents............................84
       Section 12.07   No Personal Liability of Directors, Officers, Employees
                         and Stockholders.....................................84
       Section 12.08   Governing Law..........................................84
       Section 12.09   No Adverse Interpretation of Other Agreements..........84
       Section 12.10   Successors.............................................84
       Section 12.11   Severability...........................................84
       Section 12.12   Counterpart Originals..................................84
       Section 12.13   Table of Contents, Headings, etc.......................85

EXHIBITS
Exhibit A1:  FORM OF NOTE
Exhibit A2:  FORM OF REGULATION S TEMPORARY GLOBAL NOTE
Exhibit B:   FORM OF CERTIFICATE OF TRANSFER
Exhibit C:   FORM OF CERTIFICATE OF EXCHANGE
Exhibit D:   FORM OF CERTIFICATE OF ACQUIRING INSTITUTIONAL
             ACCREDITED INVESTOR
Exhibit E:   FORM OF NOTE GUARANTEE
Exhibit F:   FORM OF SUPPLEMENTAL INDENTURE



                                      iv



<PAGE>



         INDENTURE dated as of September 29, 1999, by and among Charles River
Laboratories, Inc., a Delaware corporation (the "Company"), the guarantors
listed on the signature pages hereto and State Street Bank and Trust Company,
as trustee (the "Trustee").

         The Company, the Guarantors and the Trustee agree as follows for the
benefit of each other and for the equal and ratable benefit of the Holders of
the 13 1/2% Senior Subordinated Notes due 2009 (the "Notes"). Interest on the
Notes will accrue at the rate of 13.5% per year; provided that the rate at
which interest accrues will increase to 14.0% per year on August 15, 2000 in
the event that the Ratio of Consolidated Net Debt to Consolidated Cash Flow
for the Company as of June 30, 2000 is equal to or greater than 5.00 to 1.


                                  ARTICLE 1
                  DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.01   Definitions.

         "144A Global Note" means the form of the Notes initially sold to QIBs.

         "Accounts Receivable Subsidiary" means an Unrestricted Subsidiary of
the Company to which the Company or any of its Restricted Subsidiaries sells
any of its accounts receivable pursuant to a Receivables Facility.

         "Acquired Indebtedness" means, with respect to any specified Person,

         (1)   Indebtedness of any other Person existing at the time that
               other Person is merged with or into or became a Subsidiary
               of that specified Person, including, without limitation,
               Indebtedness incurred in connection with, or in
               contemplation of, that other Person merging with or into or
               becoming a Subsidiary of that specified Person; and

         (2)   Indebtedness  secured by a Lien  encumbering an asset acquired by
               that specified Person at the time that asset is acquired by that
               specified Person.

         "Additional  Notes" means Notes (other than the Initial Notes)issued
under this Indenture in accordance with Sections 2.02 and 4.09 hereof, as part
of the same series as the Initial Notes.

         "Affiliate" of any specified Person means any other Person which,
directly or indirectly, controls, is controlled by or is under direct or
indirect common control with, that specified Person. For purposes of this
definition, "control," when used with respect to any Person, means the power
to direct the management and policies of that Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise,
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

         "Agent" means any Registrar, Paying Agent or co-registrar.

         "Applicable Procedures" means, with respect to any transfer or
exchange of or for beneficial interests in any Global Note, the rules and
procedures of the Depositary, Euroclear and Cedelbank that apply to such
transfer or exchange.

         "Asset Sale" means:


                                      2
<PAGE>



         (1)   the sale, lease, conveyance, disposition or other transfer
               (a "disposition") of any properties, assets or rights
               (including, without limitation, by way of a sale and
               leaseback); provided that the sale, lease, conveyance or
               other disposition of all or substantially all of the assets
               of the Company and its Subsidiaries taken as a whole will be
               governed by the provisions of Sections 4.14 and/or 5.01 and
               not by the provisions of Section 4.10; and

         (2)   the issuance, sale or transfer by the Company or any of its
               Restricted Subsidiaries of Equity Interests of any of the
               Company's Restricted Subsidiaries,

               in the case of either clause (1) or (2), whether in a single
               transaction or a series of related transactions,

               (a)  that have a fair market value in excess of $5.0 million; or

               (b)  for net proceeds in excess of $5.0 million.

         Notwithstanding the foregoing, the following items shall not be
deemed to be Asset Sales:

         (1)   dispositions in the ordinary course of business;

         (2)   a disposition of assets by the Company to a Restricted Subsidiary
               or by a Restricted Subsidiary to the Company or to another
               Restricted Subsidiary;

         (3)   a disposition of Equity Interests by a Restricted Subsidiary to
               the Company or to another Restricted Subsidiary;

         (4)   the sale and leaseback of any assets within 90 days of the
               acquisition thereof;

         (5)   foreclosures on assets;

         (6)   any exchange of like property pursuant to Section 1031 of the
               Internal Revenue Code of 1986, as amended, for use in a
               Permitted Business;

         (7)   any sale of Equity Interests in, or Indebtedness or other
               securities of, an Unrestricted Subsidiary;

         (8)   a Permitted Investment or a Restricted Payment that is permitted
               by Section 4.07 hereof; and

         (9)   sales of accounts receivable, or participations therein, in
               connection with any Receivables Facility.

         "Attributable Indebtedness" in respect of a sale and leaseback
transaction means, at the time of determination, the present value (discounted
at the rate of interest implicit in such transaction, determined in accordance
with GAAP) of the obligation of the lessee for net rental payments during the
remaining term of the lease included in that sale and leaseback transaction,
including any period for which that lease has been extended or may, at the
option of the lessor, be extended.

         "Bankruptcy Law" means Title 11, U.S. Code or any similar federal or
state law for the relief of debtors.

                                      3
<PAGE>

         "Board of Directors" means the Board of Directors of the Company, or
any authorized committee of the Board of Directors.

         "Business Day" means any day other than a Legal Holiday.

         "Capital Expenditure Indebtedness" means Indebtedness incurred by any
Person to finance the purchase or construction or any property or assets
acquired or constructed by that Person which have a useful life of more than
one year so long as:

         (1)   the purchase or construction price for that property or assets
               is included in "addition to property, plant or equipment" in
               accordance with GAAP;

         (2)   the  acquisition or construction of that property or assets is
               not part of any acquisition of a Person or line of business;
               and

         (3)   that Indebtedness is incurred within 90 days of the
               acquisition or completion of construction of that property or
               assets.

         "Capital Lease Obligation" means, at the time any determination
thereof is to be made, the amount of the liability in respect of a capital
lease that would at that time be required to be capitalized on a balance sheet
in accordance with GAAP.

         "Capital Stock" means:

         (1)   in the case of a corporation, corporate stock;

         (2)   in the case of an association or business entity, any and
               all shares, interests, participations, rights or other
               equivalents (however designated) of corporate stock;

         (3)   in the case of a partnership or limited liability company,
               partnership or membership interests (whether general or
               limited); and

         (4)   any other interest or participation that confers on a Person the
               right to receive a share of the profits and losses of, or
               distributions of assets of, the issuing Person.

         "Cash Equivalents" means;

         (1)   Government Securities;

         (2)   any certificate of deposit maturing not more than 365 days
               after the date of acquisition issued by, or demand deposit
               or time deposit of, an Eligible Institution or any lender
               under the New Credit Facility;

         (3)   commercial paper maturing not more than 365 days after the
               date of acquisition of an issuer (other than an Affiliate of
               the Company) with a rating, at the time as of which any
               investment therein is made, of "A-3" (or higher) according
               to S&P or "P-2" (or higher) according to Moody's or carrying
               an equivalent rating by a nationally recognized rating
               agency if both of the two named rating agencies cease
               publishing ratings of investments;

                                      4
<PAGE>


         (4)   any bankers acceptances of money market deposit accounts issued
               by an Eligible Institution;

         (5)   any fund investing exclusively in investments of the types
               described in clauses (1) through (4) above; and

         (6)   in the case of any Subsidiary organized or having its
               principal place of business outside the United States,
               investments denominated in the currency of the jurisdiction
               in which that Subsidiary is organized or has its principal
               place of business which are similar to the items specified
               in clauses (1) through (5) above, including without
               limitation any deposit with a bank that is a lender to any
               Restricted Subsidiary.

         "Cedelbank" means Cedelbank, a limited liability company (a societe
anonyme) organized under Luxembourg law.

         "Change of Control" means the occurrence of any of the following:

         (1)   the sale, lease, transfer, conveyance or other disposition,
               other than by way of merger or consolidation, in one or a
               series of related transactions, of all or substantially all
               of the assets of the Company and its Subsidiaries, taken as
               a whole, to any "person" or "group" (as those terms are used
               in Section 13(d) of the Exchange Act), other than the
               Principals and their Related Parties;

         (2)   the adoption of a plan for the liquidation or dissolution of the
               Company;

         (3)   the consummation of any transaction, including, without
               limitation, any merger or consolidation, the result of which
               is that any "person" or "group" (as those terms are used in
               Section 13(d) of the Exchange Act), other than the
               Principals and their Related Parties, becomes the
               "beneficial owner" (as that term is defined in Rule 13d-3
               and Rule 13d-5 under the Exchange Act), directly or
               indirectly through one or more intermediaries, of 50% or
               more of the voting power of the outstanding voting stock of
               the Company; or

         (4)   the first day on which a majority of the members of the board of
               directors of the Company are not Continuing Members.

         "Commission" means the Securities and Exchange Commission.

         "Consolidated Cash Flow" means, with respect to any Person for any
period, the Consolidated Net Income of that Person and its Restricted
Subsidiaries for that period plus, to the extent deducted in computing
Consolidated Net Income,

         (1)   provision for taxes based on income or profits of that Person and
               its Restricted Subsidiaries for that period;

         (2)   Fixed Charges of that Person for that period;

         (3)   depreciation, amortization (including amortization of
               goodwill and other intangibles) and all other non-cash
               charges, but excluding any other non-cash charge to the
               extent that it represents an accrual of or reserve for cash
               expenses in any future period or amortization


                                      5
<PAGE>

               of a prepaid cash expense that was paid in a prior period, of
               that Person and its Restricted Subsidiaries for that period;

         (4)   net periodic post-retirement benefits;

         (5)   other income or expense net as set forth on the face of that
               Person's statement of operations;

         (6)   expenses and charges of the Company related to the
               Transactions, including any purchase price adjustment or any
               other payments made pursuant to or as contemplated in the
               Transaction Agreements or any financial advisory agreements
               with Donaldson, Lufkin & Jenrette Securities Corporation and
               Transaction Financing, the New Credit Facility and the
               application of the proceeds thereof; and

         (7)   any non-capitalized transaction costs incurred in connection
               with actual, proposed or abandoned financings, acquisitions
               or divestitures, including, but not limited to, financing
               and refinancing fees and costs incurred in connection with
               the Transactions and Transaction Financing,

in each case, on a consolidated basis and determined in accordance with GAAP.
Notwithstanding the foregoing, the provision for taxes based on the income or
profile of, the Fixed Charges of, and the depreciation and amortization and
other non-cash charges of, a Restricted Subsidiary of a Person shall be added
to Consolidated Net Income to compute Consolidated Cash Flow only to the
extent (and in the same proportion) that Net Income of such Restricted
Subsidiary was included in calculating the Consolidated Net Income of such
Person.

         "Consolidated Interest Expense" means, with respect to any Person for
any period, the sum of, without duplication,

         (1)   the interest expense of that Person and its Restricted
               Subsidiaries for that period, on a consolidated basis,
               determined in accordance with GAAP, including amortization
               of original issue discount, non-cash interest payments, the
               interest component of all payments associated with Capital
               Lease Obligations, imputed interest with respect to
               Attributable Indebtedness, commissions, discounts and other
               fees and charges incurred in respect of letter of credit or
               bankers' acceptance financings, and net payments, if any,
               pursuant to Hedging Obligations; provided that in no event
               shall any amortization of deferred financing costs be
               included in Consolidated Interest Expense; and

         (2)   the consolidated capitalized interest of that Person and its
               Restricted Subsidiaries for that period, whether paid or
               accrued; provided, however, that Receivables Fees shall be
               deemed not to constitute Consolidated Interest Expense.

         Notwithstanding the foregoing, the Consolidated Interest Expense with
respect to any Restricted Subsidiary that is not a Wholly Owned Restricted
Subsidiary shall be included only to the extent and in the same proportion
that the net income of that Restricted Subsidiary was included in calculating
Consolidated Net Income.

         "Consolidated Net Debt" means, with respect to any Person as of any
date of determination, the aggregate principal amount of Indebtedness for
borrowed money of such Person and its Restricted

                                      6
<PAGE>


Subsidiaries as of such date, less the aggregate amount of cash and Cash
Equivalents of such Person and its Restricted Subsidiaries, in each case
determined on a consolidated basis in accordance with GAAP.

         "Consolidated Net Income" means, with respect to any Person for any
period, the aggregate of the Net Income of that Person and its Restricted
Subsidiaries for that period, on a consolidated basis, determined in
accordance with GAAP; provided that

         (1)   the Net Income (or loss) of any Person that is not a
               Restricted Subsidiary or that is accounted for by the equity
               method of accounting shall be included only to the extent of
               the amount of dividends or distributions paid in cash to the
               referent Person or a Restricted Subsidiary thereof;

         (2)   the Net Income (or loss) of any Restricted Subsidiary other
               than a Subsidiary organized or having its principal place of
               business outside the United States shall be excluded to the
               extent that the declaration or payment of dividends or
               similar distributions by that Restricted Subsidiary of that
               Net Income (or loss) is not at the date of determination
               permitted without any prior governmental approval (that has
               not been obtained) or, directly or indirectly, by operation
               of the terms of its charter or any agreement, instrument,
               judgment, decree, order, statute, rule or governmental
               regulation applicable to that Restricted Subsidiary;

         (3)   the Net Income (or loss) of any Person  acquired in a pooling of
               interests transaction for any period prior to the date of that
               acquisition shall be excluded; and

         (4)   the cumulative effect of a change in accounting principles shall
               be excluded.

         Continuing Members" means, as of any date of determination, any
member of the Board of Directors who:

         (1)   was a member of Board of Directors immediately after consummation
               of the Recapitalization and the Recapitalization Financing; or

         (2)   was nominated for election or elected to the Board of
               Directors with the approval of, or whose election to the
               Board of Directors was ratified by, at least a majority of
               the Continuing Members who were members of the Board of
               Directors at the time of that nomination or election.

         "Corporate Trust Office of the Trustee" shall be at the address of the
Trustee specified in Section 12.02 hereof or such other address as to which
the Trustee may give notice to the Company.

         "Custodian" means any receiver, trustee, assignee, liquidator or
similar official under any Bankruptcy Law.

         "Default" means any event that is or with the passage of time or the
giving of notice or both would be an Event of Default.

         "Definitive Note" means a certificated Note registered in the name of
the Holder thereof and issued in accordance with Section 2.06 hereof, in the
form of Exhibit A-1 hereto except that such Note shall not bear the Global
Note Legend and shall not have the "Schedule of Exchanges of Interests in the
Global Note" attached thereto.


                                      7
<PAGE>


         "Depositary" means The Depository Trust Company.

         "Designated Noncash Consideration" means the fair market value of
non-cash consideration received by the Company or one of its Restricted
Subsidiaries in connection with an Asset Sale that is so designated as
Designated Noncash Consideration pursuant to an Officers' Certificate, setting
forth the basis of that valuation, executed by the principal executive officer
and the principal financial officer of the Company, less the amount of cash or
Cash Equivalents received in connection with a sale of that Designated Noncash
Consideration.

         "Disqualified Stock" means any Capital Stock that, by its terms (or
by the terms of any security into which it is convertible, or for which it is
exchangeable), or upon the happening of any event (other than any event solely
within the control of the issuer thereof), matures or is mandatorily
redeemable, pursuant to a sinking fund obligation or otherwise, is
exchangeable for Indebtedness (except to the extent exchangeable at the option
of that Person subject to the terms of any debt instrument to which that
Person is a party) or redeemable at the option of the Holder thereof, in whole
or in part, on or prior to the date on which the Notes mature; provided that
any Capital Stock that would constitute Disqualified Stock solely because the
holders thereof have the right to require the Company to repurchase that
Capital Stock upon the occurrence of a Change of Control or an Asset Sale
shall not constitute Disqualified Stock if the terms of that Capital Stock
provide that the Company may not repurchase or redeem any such Capital Stock
pursuant to those provisions unless that repurchase or redemption complies
with Section 4.07 hereof; and provided further that, if that Capital Stock is
issued to any plan for the benefit of employees of the Company or its
Subsidiaries or by any such plan to those employees, that Capital Stock shall
not constitute Disqualified Stock solely because it may be required to be
repurchased by the Company in order to satisfy applicable statutory or
regulatory obligations.

         "DLJ Merchant Banking Funds" means DLJ Merchant Banking Partners II,
L.P. and its Affiliates.

         "Domestic Subsidiary" means a Subsidiary that is organized under the
laws of the United States or any State, district or territory thereof.

         "Eligible Institution" means a commercial banking institution that
has combined capital and surplus not less than $100.0 million or its
equivalent in foreign currency, whose short-term debt is rated "A-3" or higher
according to Standard & Poor's Ratings Group ("S&P") or "P-2" or higher
according to Moody's Investor Services, Inc. ("Moody's") or carrying an
equivalent rating by a nationally recognized rating agency if both of the two
named rating agencies cease publishing ratings of investments.

         "Equity Interests" means Capital Stock and all warrants, options or
other rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).

         "Euroclear" means Morgan Guaranty Trust Company of New York, Brussels
office, as operator of the Euroclear system.

         "Exchange Act" means the Securities Exchange Act of 1934, as amended.

         "Exchange Notes" means the Notes issued in the Exchange Offer
pursuant to Section 2.06(f) hereof.

         "Exchange Offer" has the meaning set forth in the Registration Rights
Agreement.

         "Exchange Offer Registration Statement" has the meaning set forth in
the Registration Rights Agreement.

                                      8
<PAGE>


         "Existing Indebtedness" means Indebtedness of the Company and its
Restricted Subsidiaries (other than Indebtedness under the New Credit
Facility) in existence on the date of this Indenture, until those amounts are
repaid.

         "Fixed Charges" means, with respect to any Person for any period, the
sum, without duplication, of,

         (1)   the Consolidated Interest Expense of that Person for that period;
               and

         (2)   all dividend payments on any series of preferred stock of
               that Person (other than dividends payable solely in Equity
               Interests that are not Disqualified Stock),

in each case, on a consolidated basis and in accordance with GAAP.

         Fixed Charge Coverage Ratio" means, with respect to any Person for
any period, the ratio of the Consolidated Cash Flow of that Person for that
period (exclusive of amounts attributable to discontinued operations, as
determined in accordance with GAAP, or operations and businesses disposed of
prior to the Calculation Date) to the Fixed Charges of that Person for that
period (exclusive of amounts attributable to discontinued operations, as
determined in accordance with GAAP, or operations and businesses disposed of
prior to the Calculation Date).

         In the event that the referent Person or any of its Subsidiaries
incurs, assumes, guarantees or redeems any Indebtedness (other than revolving
credit borrowings) or issues or redeems preferred stock subsequent to the
commencement of the period for which the Fixed Charge Coverage Ratio is being
calculated but prior to the date on which the event for which the calculation
of the Fixed Charge Coverage Ratio is made (the "Calculation Date"), then the
Fixed Charge Coverage Ratio shall be calculated giving pro forma effect to
that incurrence, assumption, guarantee or redemption of Indebtedness, or that
issuance or redemption of preferred stock and the use of the proceeds
therefrom, as if the same had occurred at the beginning of the applicable
four-quarter reference period.

         In addition, for purposes of making the computation referred to
above, the Recapitalization and acquisitions that have been made by the
Company or any of its Subsidiaries, including all mergers or consolidations
and any related financing transactions, during the four-quarter reference
period or subsequent to that reference period and on or prior to the
Calculation Date shall be deemed to have occurred on the first day of the
four-quarter reference period and Consolidated Cash Flow for that reference
period shall be calculated to include the Consolidated Cash Flow of the
acquired entities on a pro forma basis after giving effect to cost savings
reasonably expected to be realized in connection with that acquisition, as
determined in good faith by an officer of the Company (regardless of whether
those cost savings could then be reflected in pro forma financial statements
under GAAP, Regulation S-X promulgated by the Commission or any other
regulation or policy of the Commission) and without giving effect to clause
(3) of the proviso set forth in the definition of Consolidated Net Income.

         "Foreign Credit Facilities" means any Indebtedness of a Restricted
Subsidiary organized or having its principal place of business outside the
United States. Indebtedness under the Foreign Credit Facilities outstanding on
the date on which the Notes are first issued and authenticated under this
Indenture shall be deemed to have been incurred on that date in reliance on
the first paragraph of Section 4.09 hereof.

         "GAAP" means generally accepted accounting principles set forth in
the opinions and pronouncements of the Accounting Principles Board of the
American Institute of Certified Public Accountants and statements and
pronouncements of the Financial Accounting Standards Board or in such

                                      9
<PAGE>


other statements by such other entity as have been approved by a significant
segment of the accounting profession, which are in effect on the date of this
Indenture.

         "Global Notes" means, individually and collectively, each of the
Restricted Global Notes and the Unrestricted Global Notes, in the form of
Exhibit A hereto issued in accordance with Section 2.01, 2.06(b)(iv),
2.06(d)(ii) or 2.06(f) hereof.

         "Global Note Legend" means the legend set forth in Section
2.06(g)(ii), which is required to be placed on all Global Notes issued under
this Indenture.

         "Government Securities" means direct obligations of, or obligations
guaranteed by, the United States of America, and the payment for which the
United States pledges its full faith and credit.

         "guarantee" means a guarantee (other than by endorsement of
negotiable instruments for collection in the ordinary course of business),
direct or indirect, in any manner (including, without limitation, letters of
credit or reimbursement agreements in respect thereof), of all or any part of
any Indebtedness.

         "Guarantors" means (i) each Restricted Subsidiary of the Company on
the date of this Indenture that is a Domestic Subsidiary and (ii) any other
Subsidiary that executes a Note Guarantee in accordance with the provisions of
this Indenture.

         "Hedging Obligations" means, with respect to any Person, the
obligations of such Person under (a) interest rate swap agreements, interest
rate cap agreements and interest rate collar agreements and (b) other
agreements or arrangements designed to protect such Person against
fluctuations in interest rates.

         "Holder" means a Person in whose name a Note is registered.

         "Indebtedness" means, with respect to any Person, any indebtedness of
that Person in respect of borrowed money or evidenced by bonds, notes,
debentures or similar instruments or letters of credit (or reimbursement
agreements in respect thereof) or banker's acceptances or representing Capital
Lease Obligations or the balance deferred and unpaid of the purchase price of
any property or representing any Hedging Obligations, except any such balance
that constitutes an accrued expense, trade payable or customer contract
advances, if and to the extent any of the foregoing Indebtedness (other than
letters of credit and Hedging Obligations) would appear as a liability upon a
balance sheet of that Person prepared in accordance with GAAP, as well as all
Indebtedness of others secured by a Lien on any asset of that Person (whether
or not that Indebtedness is assumed by that Person) and, to the extent not
otherwise included, the guarantee by that Person of any Indebtedness of any
other Person, provided that Indebtedness shall not include the pledge by the
Company of the Capital Stock of an Unrestricted Subsidiary of the Company to
secure Non-Recourse Debt of that Unrestricted Subsidiary.

         The amount of any Indebtedness outstanding as of any date shall be:

         (1)   the accreted value thereof, (together with any interest thereon
               that is more than 30 days past due), in the case of any
               Indebtedness that does not require current payments of interest;
               and

         (2)   the principal amount thereof (together with any interest
               thereon that is more than 30 days past due), in the case of
               any other Indebtedness provided that the principal amount of
               any Indebtedness that is denominated in any currency other
               than United States dollars shall be the amount thereof, as
               determined pursuant to the foregoing provision, converted
               into


                                      10
<PAGE>


               United States dollars at the Spot Rate in effect on the date
               that Indebtedness was incurred or, if that indebtedness was
               incurred prior to the date of this Indenture, the Spot Rate in
               effect on the date of this Indenture.

         "Indenture" means this Indenture, as amended or supplemented from time
to time.

         "Indirect Participant" means a Person who holds a beneficial interest
in a Global Note through a Participant.

         "Initial Notes" means the first $150,000,000 aggregate principal
amount of Notes issued under this Indenture on the date hereof.

         "Institutional  Accredited  Investor" means an institution that is an
"accredited  investor" as defined in Rule 501(a)(1),  (2), (3) or (7) under the
Securities Act, who are not also QIBs.

         "Investments" means, with respect to any Person, all investments by
that Person in other Persons, including Affiliates, in the forms of direct or
indirect loans (including guarantees by the referent Person of, and Liens on
any assets of the referent Person securing, Indebtedness or other obligations
of other Persons), advances or capital contributions (excluding commission,
travel and similar advances to officers and employees made in the ordinary
course of business), purchases or other acquisitions for consideration of
Indebtedness, Equity Interests or other securities, together with all items
that are or would be classified as investments on a balance sheet prepared in
accordance with GAAP, provided that an investment by the Company for
consideration consisting of common equity securities of the Company shall not
be deemed to be an Investment other than for purposes of clause (3) of the
definition of "Qualified Proceeds."

         If the Company or any Restricted Subsidiary of the Company sells or
otherwise disposes of any Equity Interests of any direct or indirect
Restricted Subsidiary of the Company such that, after giving effect to any
such sale or disposition, that Person is no longer a Subsidiary of the
Company, the Company shall be deemed to have made an Investment on the date of
any such sale or disposition equal to the fair market value of the Equity
Interests of that Restricted Subsidiary not sold or disposed of in an amount
determined as provided in the final paragraph of Section 4.07 hereof.

         "Legal Holiday" means a Saturday, a Sunday or a day on which banking
institutions in the City of New York or the city in which the principal
corporate trust office of the Trustee is located, or at a place of payment,
are authorized by law, regulation or executive order to remain closed. If a
payment date is a Legal Holiday at a place of payment, payment may be made at
that place on the next succeeding day that is not a Legal Holiday, and no
interest shall accrue on such payment for the intervening period.

         "Letter of Transmittal" means the letter of transmittal to be
prepared by the Company and sent to all Holders of the Notes for use by such
Holders in connection with the Exchange Offer.

         "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of that asset,
whether or not filed, recorded or otherwise perfected under applicable law,
including any conditional sale or other title retention agreement, any lease
in the nature thereof, any option or other agreement to sell or give a
security interest in and any filing of or agreement to give any financing
statement under the Uniform Commercial Code (or equivalent statutes) of any
jurisdiction.

         "Liquidated Damages" means all liquidated damages then owing pursuant
to Section 5 of the Registration Rights Agreement.


                                      11
<PAGE>


         "Management Loans" means one or more loans by the Company or Parent
to officers and/or directors of the Company and any of its Restricted
Subsidiaries to finance the purchase by such officers and directors of common
stock of Parent or the Company or membership interests in CRL Acquisition LLC;
provided that the aggregate principal amount of all such Management Loans
outstanding at any time shall not exceed $1.5 million.

         "Net Income" means, with respect to any Person, the net income (loss)
of that Person, determined in accordance with GAAP and before any reduction in
respect of preferred stock dividends, excluding, however:

         (1)   any gain (or loss), together with any related provision for taxes
               on that gain (or loss), realized in connection with:

               (a)  any Asset Sale, including, without limitation, dispositions
                    pursuant to sale and leaseback transactions; or

               (b)  the extinguishment of any Indebtedness of that Person or
                    any of its Restricted Subsidiaries; and

         (2)   any  extraordinary or nonrecurring gain (or loss), together with
               any related provision for taxes on that extraordinary or
               nonrecurring gain (or loss).

         "Net Proceeds" means the aggregate cash proceeds received by the
Company or any of its Restricted Subsidiaries in respect of any Asset Sale
(including, without limitation, any cash received upon the sale or other
disposition of any non-cash consideration received in any Asset Sale), net of,
without duplication,

         (1)   the direct costs relating to that Asset Sale, including,
               without limitation, legal, accounting and investment banking
               fees, and sales commissions, recording fees, title transfer
               fees and appraiser fees and cost of preparation of assets
               for sale, and any relocation expenses incurred as a result
               thereof;

         (2)   taxes paid or payable as a result thereof (after taking into
               account any available tax credits or deductions  and any tax
               sharing arrangements);

         (3)   amounts required to be applied to the repayment of
               Indebtedness (other than revolving credit Indebtedness
               incurred pursuant to the New Credit Facility) secured by a
               Lien on the asset or assets that were the subject of that
               Asset Sale; and

         (4)   any reserve established in accordance with GAAP or any
               amount placed in escrow, in either case for adjustment in
               respect of the sale price of such asset or assets until such
               time as that reserve is reversed or that escrow arrangement
               is terminated, in which case Net Proceeds shall include only
               the amount of the reserve so reversed or the amount returned
               to the Company or its Restricted Subsidiaries from that
               escrow arrangement, as the case may be.

         "New Credit Facility" means that certain Credit Agreement, dated as
of September 29, 1999 among the Company, certain subsidiaries of the Company
from time to time party thereto as guarantors, various financial institutions
party thereto, and DLJ Capital Funding, Inc., as syndication agent and
administrative agent, including any related notes, guarantees, letters of
credit collateral documents, rate


                                      12
<PAGE>


protection or hedging arrangement, instruments and agreements executed in
connection therewith, and, in each case, as amended, modified, renewed,
refunded, replaced or refinanced from time to time, including any agreement:

         (1)   extending or shortening the maturity of any Indebtedness incurred
               thereunder or contemplated thereby;

         (2)   adding or deleting borrowers or guarantors thereunder;

         (3)   increasing the amount of Indebtedness incurred thereunder or
               available to be borrowed thereunder, provided that on the
               date that Indebtedness is incurred it would not be
               prohibited by clause (i) of Section 4.09 hereof; or

         (4)   otherwise altering the terms and conditions thereof.

         Indebtedness under the New Credit Facility outstanding on the date on
which the Notes are first issued and authenticated under this Indenture shall
be deemed to have been incurred on that date in reliance on the first
paragraph of Section 4.09 hereof.

         "Non-Recourse Debt" means Indebtedness,

         (1)   no default with respect to, which (including any rights that
               the holders thereof may have to take enforcement action
               against an Unrestricted Subsidiary) would permit (upon
               notice, lapse of time or both) any holder of any other
               Indebtedness of the Company or any of its Restricted
               Subsidiaries to declare a default on such other Indebtedness
               or cause the payment thereof to be accelerated or payable
               prior to its stated maturity; and

         (2)   as to which the lenders have been notified in writing that
               they will not have any recourse to the stock (other than the
               stock of an Unrestricted Subsidiary pledged by the Company
               to secure debt of that Unrestricted Subsidiary) or assets of
               the Company or any of its Restricted Subsidiaries;

provided that in no event shall Indebtedness of any Unrestricted Subsidiary
fail to be Non-Recourse Debt solely as a result of any default provisions
contained in a guarantee thereof by the Company or any of its Restricted
Subsidiaries if the Company or that Restricted Subsidiary was otherwise
permitted to incur that guarantee pursuant to this Indenture.

         "Non-U.S. Person" means a Person who is not a U.S. Person.

         "Note Custodian" means the Trustee, as custodian with respect to the
Notes in global form, or any successor entity thereto.

         "Note Guarantee" means the guarantee by each Guarantor of the
Company's payment obligations under this Indenture and on the Notes, executed
pursuant to the provisions of this Indenture.

         "Notes" has the meaning assigned to it in the preamble to this
Indenture. The Initial Notes and the Additional Notes shall be treated as a
single class for all purposes under this Indenture.

         "Obligations" means any principal, interest, penalties, fees,
indemnifications, reimbursements, damages and other liabilities payable under
the documentation governing any Indebtedness.


                                      13
<PAGE>


         "Offering" means the offering of the Units by the Company.

         "Officer" means, with respect to any Person, the Chairman of the
Board, the Chief Executive Officer, the President, the Chief Operating
Officer, the Chief Financial Officer, the Treasurer, any Assistant Treasurer,
the Controller, the Secretary or any Vice-President of such Person or any
other officer designated by the Board of Directors.

         "Officers' Certificate" means a certificate signed on behalf of the
Company by two Officers of the Company, one of whom must be the principal
executive officer, the principal financial officer, the treasurer or the
principal accounting officer of the Company, that meets the requirements of
Sections 12.04 and 12.05 hereof.

         "Opinion of Counsel" means an opinion from legal counsel who is
reasonably acceptable to the Trustee, that meets the requirements of Sections
12.04 and 12.05 hereof. The counsel may be an employee of or counsel to the
Company, any Subsidiary of the Company or the Trustee.

         "Parent" means Charles River Laboratories Holdings, Inc., the
corporate parent of the Company, or its successors.

         "Pari Passu Indebtedness" means Indebtedness of the Company that
ranks pari passu in right of payment to the Notes.

         "Participant" means, with respect to the Depositary, Euroclear or
Cedelbank, a Person who has an account with the Depositary, Euroclear or
Cedelbank, respectively (and, with respect to The Depository Trust Company,
shall include Euroclear and Cedelbank).

         "Participating Broker-Dealer" has the meaning set forth in the
Registration Rights Agreement.

         "Permitted Business" means any person engaged, directly or
indirectly, in the animal research or biomedical products and services
business or any business reasonably related, incidental or ancillary thereto.

         "Permitted Investments" means:

         (1)   any Investment in the Company or in a Restricted Subsidiary of
               the Company;

         (2)   any Investment in cash or Cash Equivalents;

         (3)   any Investment by the Company or any Restricted Subsidiary of the
               Company in a Person, if as a result of that Investment,

               (a)  that Person becomes a Restricted Subsidiary of the Company;
                    or

               (b)  that Person is merged, consolidated or amalgamated
                    with or into, or transfers or conveys substantially
                    all of its assets to, or is liquidated into, the
                    Company or a Wholly Owned Restricted Subsidiary of
                    the Company;

         (4)   any Investment made as a result of the receipt of non-cash
               consideration from an Asset Sale that was made pursuant to and
               in compliance with Section 4.10 hereof;

                                      14
<PAGE>


         (5)   any Investment acquired solely in exchange for Equity Interests
               (other than Disqualified Stock) of the Company;

         (6)   any Investment in a Person engaged in a Permitted Business
               (other than an Investment in an Unrestricted Subsidiary)
               having an aggregate fair market value, taken together with
               all other Investments made pursuant to this clause (6) that
               are at that time outstanding, not to exceed 15% of Total
               Assets at the time of that Investment (with the fair market
               value of each Investment being measured at the time made and
               without giving effect to subsequent changes in value);

         (7)   Investments relating to any special purpose Wholly Owned
               Subsidiary of the Company organized in connection with a
               Receivables Facility that, in the good faith determination
               of the Board of Directors, are necessary or advisable to
               effect that Receivables Facility;

         (8)   the Management Loans or Investments in Parent to fund the
               Management Loans; and

         (9)   Hedging Obligations permitted to be incurred under Section 4.09
               hereof.

         "Permitted Liens" means:

         (1)   Liens on property of a Person existing at the time that
               Person is merged into or consolidated with the Company or
               any Restricted Subsidiary, provided that those Liens were
               not incurred in contemplation of that merger or
               consolidation and do not secure any property or assets of
               the Company or any Restricted Subsidiary other than the
               property or assets subject to the Liens prior to that merger
               or consolidation;

         (2)   Liens existing on the date of this Indenture;

         (3)   Liens securing Indebtedness consisting of Capitalized Lease
               Obligations, purchase money Indebtedness, mortgage
               financings, industrial revenue bonds or other monetary
               obligations, in each case incurred solely for the purpose of
               financing all or any part of the purchase price or cost of
               construction or installation of assets used in the business
               of the Company or its Restricted Subsidiaries, or repairs,
               additions or improvements to those assets, provided that:

               (a)  those Liens secure Indebtedness in an amount not in
                    excess of the original purchase price or the
                    original cost of any such assets or repair,
                    additional or improvement thereto (plus an amount
                    equal to the reasonable fees and expenses in
                    connection with the incurrence of that
                    Indebtedness);

               (b)  those Liens do not extend to any other assets of
                    the Company or its Restricted Subsidiaries (and, in
                    the case of repair, addition or improvements to any
                    such assets, that Lien extends only to the assets
                    (and improvements thereto or thereon) repaired,
                    added to or improved);

               (c)  the Incurrence of that Indebtedness is permitted by Section
                    4.09 hereof;" and

               (d)  those Liens attach within 365 days of that purchase,
                    construction, installation, repair, addition or improvement;

                                      15
<PAGE>


         (4)   Liens to secure any refinancings, renewals, extensions,
               modification or replacements (collectively, "refinancing")
               (or successive refinancings), in whole or in part, of any
               Indebtedness secured by Liens referred to in the clauses
               above so long as that Lien does not extend to any other
               property (other than improvements thereto);

         (5)   Liens securing letters of credit entered into in the ordinary
               course of business and consistent with past business practice;

         (6)   Liens on and pledges of the capital stock of any Unrestricted
               Subsidiary securing Non-Recourse Debt of that Unrestricted
               Subsidiary;

         (7)   Liens securing (a) Indebtedness (including all Obligations)
               under the New Credit Facility or any Foreign Credit Facility
               (b) Hedging Obligations payable to a lender under the New
               Credit Facility or an Affiliate thereof or to a Person that
               was a lender of Affiliate thereof at the time the contract
               was entered into to the extent such Hedging Obligations are
               secured by Liens on assets also securing Indebtedness
               (including all Obligations) under the New Credit Facility;
               and

         (8)   other Liens securing Indebtedness that is permitted by the
               terms of this Indenture to be outstanding having an
               aggregate principal amount at any one time outstanding not
               to exceed $50.0 million.

         "Permitted Refinancing Indebtedness" means any Indebtedness of the
Company or any of its Restricted Subsidiaries issued within 60 days after
repayment of, in exchange for, or the net proceeds of which are used to
extend, refinance, renew, replace, defease or refund other Indebtedness of the
Company or any of its Restricted Subsidiaries; provided that:

         (1)   the principal amount (or accreted value, if applicable) of
               that Permitted Refinancing Indebtedness does not exceed the
               principal amount of (or accreted value, if applicable), plus
               premium, if any, and accrued interest on the Indebtedness so
               extended, refinanced, renewed, replaced, defeased or
               refunded (plus the amount of reasonable expenses incurred in
               connection therewith);

         (2)   that Permitted Refinancing Indebtedness has a final maturity
               date no earlier than the final maturity date of, and has a
               Weighted Average Life to Maturity equal to or greater than
               the Weighted Average Life to Maturity of, the Indebtedness
               being extended, refinanced, renewed, replaced, defeased or
               refunded; and

         (3)   if the Indebtedness being extended, refinanced, renewed,
               replaced, defeased or refunded is subordinated in right of
               payment to the Notes, that Permitted Refinancing
               Indebtedness is subordinated in right of payment to, the
               Notes on terms at least as favorable, taken as a whole, to
               the Holders of Notes as those contained in the documentation
               governing the Indebtedness being extended, refinanced,
               renewed, replaced, defeased or refunded.

         "Person" means any individual, corporation, partnership, limited
liability company, joint venture, association, joint-stock company, trust,
unincorporated organization or government or agency or political subdivision
thereof (including any subdivision or ongoing business of any such entity or
substantially all of the assets of any such entity, subdivision or business).

         "Principals" means the DLJ Merchant Banking Funds.

                                      16
<PAGE>


         "Private Placement Legend" means the legend set forth in Section
2.06(g)(i) to be placed on all Notes issued under this Indenture except where
otherwise permitted by the provisions of this Indenture.

         "Public Equity Offering" means:

               any issuance of common stock by the Company, other than to
               Parent and other than Disqualified Stock; or

               any issuance of common stock or preferred stock by Parent,
               other than Disqualified Stock.

that is registered pursuant to the Securities Act, other than issuances
registered on Form S-8 and issuances registered on Form S-4, excluding
issuances of common stock pursuant to employee benefit plans of Parent or the
Company or otherwise as compensation to employees of Parent or the Company.

         "Qualified Proceeds" means any of the following or any combination of
the following:

         (1)   cash;

         (2)   Cash Equivalents;

         (3)   assets (other than Investments) that are used or useful in a
               Permitted Business; and

         (4)   the Capital Stock of any Person engaged in a Permitted
               Business if, in connection with the receipt by the Company
               or any Restricted Subsidiary of the Company of that Capital
               Stock,

               (a)  that Person becomes a Restricted Subsidiary of the Company
                    or any Restricted Subsidiary of the Company; or

               (b)  that Person is merged, consolidated or amalgamated
                    with or into, or transfers or conveys substantially
                    all of its assets to, or is liquidated into, the
                    Company or any Restricted Subsidiary of the
                    Company.

         "QIB" means a "qualified institutional buyer" as defined in Rule 144A.

         "Ratio of Consolidated Net Debt to Consolidated Cash Flow" means,
with respect to any Person as of any date of determination, the ratio of (x)
the Consolidated Net Debt of such Person as of such date of determination
(exclusive of amounts attributable to discontinued operations, as determined
in accordance with GAAP, or operations and businesses disposed of prior to the
date of determination) to (y) the Consolidated Cash Flow of such Person for
the four full fiscal quarters ending on or immediately preceding such date of
determination (exclusive of amounts attributable to discontinued operations,
as determined in accordance with GAAP, or operations and businesses disposed
of prior to the date of determination).

         In the event that the referent Person or any of its Subsidiaries
incurs, assumes, guarantees or redeems any Indebtedness (other than revolving
credit borrowings) or issues or redeems preferred stock subsequent to the
commencement of the period for which the Ratio of Consolidated Net Debt to
Consolidated Cash Flow is being calculated but prior to the date of
determination, then the Ratio of Consolidated Net Debt to Consolidated Cash
Flow shall be calculated giving pro forma effect to that incurrence,
assumption, guarantee or redemption of Indebtedness, or that


                                      17
<PAGE>


issuance or redemption of preferred stock and the use of the proceeds therefrom,
as if the same had occurred at the beginning of the applicable four-quarter
reference period.

         In addition, for purposes of making the computation referred to
above, the Recapitalization and acquisitions that have been made by Charles
River or any of its Subsidiaries, including all mergers or consolidations and
any related financing transactions, during the four-quarter reference period
shall be deemed to have occurred on the first day of the four-quarter
reference period and Consolidated Cash Flow of the acquired entities on a pro
forma basis after giving effect to cost savings reasonably expected to be
realized in connection with that acquisition, as determined in good faith by
an officer of Charles River (regardless of whether those cost savings could
then be reflected in pro forma financial statements under GAAP, Regulation S-X
promulgated by the SEC or any other regulation or policy of the SEC) and
without giving effect to clause (3) of the proviso set forth in the definition
of Consolidated Net Income.

         "Recapitalization" means the recapitalization of the Company by the
Principals and their Related Parties pursuant to the terms of the
Recapitalization Agreement.

         "Recapitalization Agreement" means that certain Recapitalization
Agreement dated as of July 25, 1999 among the Company, Bausch & Lomb
Incorporated, Parent, Charles River SPAFAS, Inc., Bausch & Lomb International,
Inc., Wilmington Partners, L.P., Bausch & Lomb Canada, Inc., CRL Acquisition
LLC and DLJ Merchant Banking Partners II, L.P.

         "Receivables Facility" means one or more receivables financing
facilities, as amended from time to time, pursuant to which the Company or any
of its Restricted Subsidiaries sells its accounts receivable to an Accounts
Receivable Subsidiary.

         "Receivables Fees" means distributions or payments made directly or
by means of discounts with respect to any participation interests issued or
sold in connection with, and other fees paid to a Person that is not a
Restricted Subsidiary in connection with, any Receivables Facility.

         "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of September 29, 1999, by and among the Company and the
other parties named on the signature pages thereof, as such agreement may be
amended, modified or supplemented from time to time, and, with respect to any
Additional Notes, one or more registration rights agreements between the
Company and the other parties thereto, as such agreement(s) may be amended,
modified or supplemented from time to time, relating to rights given by the
Company to the purchasers of Additional Notes to register such Additional
Notes under the Securities Act.

         "Regulation S" means Regulation S promulgated under the Securities Act.

         "Regulation S Global Note" means a Regulation S Temporary Global Note
or Regulation S Permanent Global Note, as appropriate.

         "Regulation S Permanent Global Note" means a permanent global Note in
the form of Exhibit A-1 hereto bearing the Global Note Legend and the Private
Placement Legend, if applicable, and deposited with or on behalf of and
registered in the name of the Depositary or its nominee, issued in a
denomination equal to the outstanding principal amount of the Regulation S
Temporary Global Note upon expiration of the Restricted Period.


                                      18
<PAGE>


         "Regulation S Temporary Global Note" means a temporary global Note in
the form of Exhibit A-2 hereto bearing the Global Note Legend and the Private
Placement Legend and deposited with or on behalf of and registered in the name
of the Depositary or its nominee, issued in a denomination equal to the
outstanding principal amount of the Notes initially sold in reliance on Rule
903 of Regulation S.

         "Related Party" means, with respect to any Principal,

         (1)   any controlling stockholder or partner of that Principal on the
               date of this Indenture; or

         (2)   any trust, corporation, partnership or other entity, the
               beneficiaries, stockholders, partners, owners or Person
               beneficially holding (directly or through one or more
               Subsidiaries) a 51% or more controlling interest of which
               consist of the Principals and/or such other Persons referred
               to in the immediately preceding clauses (1) or (2).

         "Responsible Officer," when used with respect to the Trustee, means
any officer within the Corporate Trust Administration of the Trustee (or any
successor group of the Trustee) or any other officer of the Trustee
customarily performing functions similar to those performed by any of the
above designated officers and also means, with respect to a particular
corporate trust matter, any other officer to whom such matter is referred
because of his knowledge of and familiarity with the particular subject.

         "Restricted Definitive Note" means a Definitive Note bearing the
Private Placement Legend.

         "Restricted Global Note" means a Global Note bearing the Private
Placement Legend.

         "Restricted Investment" means an Investment other than a Permitted
Investment.

         "Restricted Period" means the 40-day distribution compliance period
as defined in Regulation S.

         "Restricted Subsidiary" of a Person means any Subsidiary of the
referent Person that is not an Unrestricted Subsidiary.

         "Rule 144" means Rule 144 promulgated under the Securities Act.

         "Rule 144A" means Rule 144A promulgated under the Securities Act.

         "Rule 903" means Rule 903 promulgated under the Securities Act.

         "Rule 904" means Rule 904 promulgated under the Securities Act.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Senior Guarantees" means the Guarantees by the Guarantors of
Obligations under the New Credit Facility.

         "Shelf Registration Statement" means the Shelf Registration Statement
as defined in the Registration Rights Agreement.

         "Sierra  Acquisition"  means the acquisition of SBI Holdings,  Inc.
by the Company pursuant to the terms of the Sierra Acquisition Agreement.

                                      19
<PAGE>

         "Sierra Acquisition Agreement" means Stock Purchase Agreement among
the Company and SBI Holdings, Inc. and its stockholders dated September 3, 1999.

         "Significant Subsidiary" means any Subsidiary that would be a
"significant subsidiary" as defined in Article 1, Rule 1-02 of Regulation S-X,
promulgated pursuant to the Securities Act, as that Regulation is in effect on
the date hereof.

         "Spot Rate" means, for any currency, the spot rate at which such
currency is offered for sale against United States dollars as determined by
reference to the New York foreign exchange selling rates, as published in The
Wall Street Journal on that date of determination for the immediately
preceding business day or, if that rate is not available, as determined in any
publicly available source of similar market data.

         "Stated Maturity" means, with respect to any installment of interest
or principal on any series of Indebtedness, the date on which that payment of
interest or principal was scheduled to be paid in the original documentation
governing such Indebtedness, and shall not include any contingent obligations
to repay, redeem or repurchase any such interest or principal prior to the
date originally scheduled for the payment thereof.

         "Subsidiary" means, with respect to any Person,

         (1)   any corporation, association or other business entity of
               which more than 50% of the total voting power of shares of
               Capital Stock entitled (without regard to the occurrence of
               any contingency) to vote in the election of directors,
               managers or trustees thereof is at the time owned or
               controlled, directly or indirectly, by that Person or one or
               more of the other Subsidiaries of that Person (or a
               combination thereof); and

         (2)   any partnership or limited liability company,

               (a)  the sole general partner or the managing general
                    partner or managing member of which is that Person
                    or a Subsidiary of that Person; or

               (b)  the only general partners or managing members of
                    which are that Person or of one or more
                    Subsidiaries of that Person (or any combination
                    thereof).

         "Tax Sharing Agreement" means any tax sharing agreement or
arrangement between the Company and Parent, as the same may be amended from
time to time; provided that in no event shall the amount permitted to be paid
pursuant to all such agreements and/or arrangements exceed the amount the
Company would be required to pay for income taxes were it to file a
consolidated tax return for itself and its consolidated Restricted
Subsidiaries as if it were a corporation that was a parent of a consolidated
group.

         "TIA"  means the Trust Indenture Act of 1939 (15  U.S.C.ss.ss.77aaa-
77bbbb) as in effect on the date on which this Indenture is qualified under the
 TIA.

         "Total Assets" means the total consolidated assets of the Company and
its Restricted Subsidiaries, as shown on the most recent balance sheet
(excluding the footnotes thereto) of the Company.

         "Transactions" means the Recapitalization and the Sierra Acquisition.


                                      20
<PAGE>


         "Transaction Agreements" means the Recapitalization Agreement and the
Sierra Acquisition Agreement.

         "Transaction Financing" means;

         (1)   the issuance and sale by Parent of senior discount debentures
               with warrants and senior subordinated discount note for
               consideration

         (2)   the issuance and sale by the Company of the Notes; and

         (3)   the execution and delivery by the Company and certain of its
               subsidiaries of the New Credit Facility and the borrowing of
               loans, if any, and issuance of letters of credit thereunder
               to fund the Transactions and any related transactions,
               including without limitation, the payment of fees and
               expenses and the refinancing of outstanding indebtedness of
               the Company and its subsidiaries;

the proceeds of each of which were used to fund the purchase price for the
Recapitalization and related fees and expenses.

         "Trustee" means the party named as such above until a successor
replaces it in accordance with the applicable provisions of this Indenture and
thereafter means the successor serving hereunder.

         "Unrestricted Global Note" means a permanent global Note in the form
of Exhibit A-1 attached hereto that bears the Global Note Legend and that has
the "Schedule of Exchanges of Interests in the Global Note" attached thereto,
and that is deposited with or on behalf of and registered in the name of the
Depositary, representing a series of Notes that do not bear the Private
Placement Legend.

         "Unrestricted Definitive Note" means one or more Definitive Notes
that do not bear and are not required to bear the Private Placement Legend.

         "Unrestricted Subsidiary" means any Subsidiary that is designated by
the Board of Directors as an Unrestricted Subsidiary pursuant to a board
resolution, but only to the extent that Subsidiary:

         (1)   has no Indebtedness other than Non-Recourse Debt;

         (2)   is not party to any agreement, contract, arrangement or
               understanding with the Company or any Restricted Subsidiary
               of the Company unless the terms of any such agreement,
               contract, arrangement or understanding are no less favorable
               to the Company or that Restricted Subsidiary than those that
               might be obtained at the time from Persons who are not
               Affiliates of the Company;

         (3)   is a Person with respect to which neither the Company nor any of
               its Restricted Subsidiaries has any direct or indirect
               obligation,

               (a)  to subscribe for additional Equity Interests (other than
                    Investments described in clause (7) of the definition of
                    Permitted Investments); or

               (b)  to maintain or preserve that Person's financial
                    condition or to cause that Person to achieve any
                    specified levels of operating results; and


                                      21
<PAGE>


         (4)   has not guaranteed or otherwise directly or indirectly provided
               credit support for any Indebtedness of the Company or any of
               its Restricted Subsidiaries.

         Any such designation by the board of directors shall be evidenced to
the Trustee by filing with the Trustee a certified copy of the board
resolution giving effect to that designation and an Officers' Certificate
certifying that designation complied with the foregoing conditions and was
permitted by Section 4.07 hereof. If, at any time, any Unrestricted Subsidiary
would fail to meet the foregoing requirements as a Unrestricted Subsidiary, it
shall thereafter cease to be an Unrestricted Subsidiary for purposes of this
Indenture and any Indebtedness of that Subsidiary shall be deemed to be
incurred by a Restricted Subsidiary of the Company as of that date (and, if
that Indebtedness is not permitted to be incurred as of that date under
Section 4.09 hereof, the Company shall be in default of that covenant).

         The Board of Directors may at any time designate any Unrestricted
Subsidiary to be a Restricted Subsidiary; provided that the designation shall
be deemed to be an incurrence of Indebtedness by a Restricted Subsidiary of
the Company of any outstanding Indebtedness of that Unrestricted Subsidiary
and that designation shall only be permitted if:

         (1)   that Indebtedness is permitted under Section 4.09 hereof; and

         (2)   no Default or Event of Default would be in existence following
               that designation.

         "U.S. Person" means a U.S. person as defined in Rule 902(o) under the
Securities Act.

         "Weighted Average Life to Maturity" means, when applied to any
Indebtedness at any date, the number of years obtained by dividing:

         (1)   the sum of the products obtained by multiplying,

               (a)  the amount of each then remaining installment,
                    sinking fund, serial maturity or other required
                    payments of principal, including payment at final
                    maturity, in respect thereof; by

               (b)  the number of years (calculated to the nearest
                    one-twelfth) that will elapse between that date and
                    the making of that payment; by

         (2)   the then outstanding principal amount of that Indebtedness.

         "Wholly Owned Restricted Subsidiary" of any Person means a Restricted
Subsidiary of that Person all the outstanding Capital Stock or other ownership
interests of which (other than directors' qualifying shares) shall at the time
be owned by that Person or by one or more Wholly Owned Restricted Subsidiaries
of that Person or by that Person and one or more Wholly Owned Restricted
Subsidiaries of that Person.

         "Wholly Owned Subsidiary" of any Person means a Subsidiary of that
Person all of the outstanding Capital Stock or other ownership interests of
which (other than directors' qualifying shares) shall at the time be owned by
that Person or by one or more Wholly Owned Subsidiaries of that Person.

Section 1.02      Other Definitions.

                                                                     Defined in
                   Term                                                Section


                                      22
<PAGE>


             "Affiliate Transaction".....................................4.11
             "Asset Sale"................................................4.10
             "Asset Sale Offer"..........................................3.09
             "Authentication Order"......................................2.02
             "Bankruptcy Law"............................................4.01
             "Change of Control Offer"...................................4.15
             "Change of Control Payment".................................4.15
             "Change of Control Payment Date" ...........................4.15
             "Covenant Defeasance".......................................8.03
             "Designated Senior Indebtedness"...........................10.02
             "Event of Default"..........................................6.01
             "Excess Proceeds"...........................................4.10
             "incur".....................................................4.09
             "Legal Defeasance" .........................................8.02
             "Offer Amount"..............................................3.09
             "Offer Period"..............................................3.09
             "Paying Agent"..............................................2.03
             "Permitted Indebtedness"....................................4.09
             "Permitted Junior Securities"..............................10.02
             "Purchase Date".............................................3.09
             "Registrar".................................................2.03
             "Representative"...........................................10.02
             "Restricted Payments".......................................4.07
             "Senior Indebtedness"......................................10.02

Section 1.03   Incorporation of TIA Provisions.

         Whenever this Indenture refers to a provision of the TIA, the
provision is incorporated by reference in and made a part of this Indenture.

         The following TIA terms used in this Indenture have the following
meanings:

         "indenture securities" means the Notes;

         "indenture security Holder" means a Holder of a Note;

         "indenture to be qualified" means this Indenture;

         "indenture trustee" or "institutional trustee" means the Trustee; and

         "obligor" on the Notes means the Company and any successor obligor upon
the Notes.

         All other terms used in this Indenture that are defined by the TIA,
defined by TIA reference to another statute or defined by Commission rule
under the TIA have the meanings so assigned to them.

Section 1.04   Rules of Construction.

         Unless the context otherwise requires:

                                      23
<PAGE>


         (1)   a term has the meaning assigned to it;

         (2)   an accounting term not otherwise defined has the meaning
assigned to it in accordance with GAAP;

         (3)   "or" is not exclusive;

         (4)   words in the singular include the plural, and in the plural
include the singular;

         (5)   provisions apply to successive events and transactions; and

         (6)   references to sections of or rules under the Securities Act shall
be deemed to include substitute, replacement of successor sections or rules
adopted by the Commission from time to time.


                                   ARTICLE 2
                                   THE NOTES

Section 2.01   Form and Dating.

         (a) General. The Notes and the Trustee's certificate of authentication
shall be substantially in the form of Exhibit A hereto. The Notes may have
notations, legends or endorsements required by law, stock exchange rule or
usage. Each Note shall be dated the date of its authentication. The Notes
shall be in denominations of $1,000 and integral multiples thereof.

         The terms and provisions contained in the Notes shall constitute, and
are hereby expressly made, a part of this Indenture and the Company, the
Guarantors and the Trustee, by their execution and delivery of this Indenture,
expressly agree to such terms and provisions and to be bound thereby. However,
to the extent any provision of any Note conflicts with the express provisions
of this Indenture, the provisions of this Indenture shall govern and be
controlling.

         (b) Global Notes. Notes issued in global form shall be substantially in
the form of Exhibit A-1 attached hereto (including the Global Note Legend
thereon and the "Schedule of Exchanges of Interests in the Global Note"
attached thereto). Notes issued in definitive form shall be substantially in
the form of Exhibit A-1 attached hereto (but without the Global Note Legend
thereon and without the "Schedule of Exchanges of Interests in the Global
Note" attached thereto). Each Global Note shall represent such of the
outstanding Notes as shall be specified therein and each shall provide that it
shall represent the aggregate principal amount of outstanding Notes from time
to time endorsed thereon and that the aggregate principal amount of
outstanding Notes represented thereby may from time to time be reduced or
increased, as appropriate, to reflect exchanges and redemptions. Any
endorsement of a Global Note to reflect the amount of any increase or decrease
in the aggregate principal amount of outstanding Notes represented thereby
shall be made by the Trustee or the Note Custodian, at the direction of the
Trustee, in accordance with instructions given by the Holder thereof as
required by Section 2.06 hereof.

         (c) Temporary Global Notes. Notes offered and sold in reliance on
Regulation S shall be issued initially in the form of Exhibit A-2 attached
hereto, which shall be deposited on behalf of the purchasers of the Notes
represented thereby with the Trustee, at its New York office, as custodian for
the Depositary, and registered in the name of the Depositary or the nominee of
the Depositary for the accounts of designated agents holding on behalf of
Euroclear or Cedelbank, duly executed by the


                                      24
<PAGE>


Company and authenticated by the Trustee as hereinafter provided. The
Restricted Period shall be terminated upon the receipt by the Trustee of (i) a
written certificate from the Depositary, together with copies of certificates
from Euroclear and Cedelbank certifying that they have received certification
of non-United States beneficial ownership of 100% of the aggregate principal
amount of the Regulation S Temporary Global Note (except to the extent of any
beneficial owners thereof who acquired an interest therein during the
Restricted Period pursuant to another exemption from registration under the
Securities Act and who will take delivery of a beneficial ownership interest
in a 144A Global Note, all as contemplated by Section 2.06 (a) (ii) hereof),
and (ii) an Officers' Certificate from the Company. Following the termination
of the Restricted Period, beneficial interests in the Regulation S Temporary
Global Note shall be exchanged for beneficial interests in Regulation S
Permanent Global Notes pursuant to the Applicable Procedures. Simultaneously
with the authentication of Regulation S Permanent Global Notes, the Trustee
shall cancel the Regulation S Temporary Global Note. The aggregate principal
amount of the Regulation S Temporary Global Note and the Regulation S
Permanent Global Notes may from time to time be increased or decreased by
adjustments made on the records of the Trustee and the Depositary or its
nominee, as the case may be, in connection with transfers of interest as
hereinafter provided.

         (d) Euroclear and Cedelbank Procedures Applicable. The provisions of
the "Operating Procedures of the Euroclear System" and "Terms and Conditions
Governing Use of Euroclear" and the "General Terms and Conditions of
Cedelbank" and "Customer Handbook" of Cedelbank shall be applicable to
transfers of beneficial interests in the Regulation S Temporary Global Note
and the Regulation S Permanent Global Notes that are held by Participants
through Euroclear or Cedelbank.

Section 2.02   Execution and Authentication.

         One Officer shall sign the Notes for the Company by manual or
facsimile signature.

         If an Officer whose signature is on a Note no longer holds that
office at the time a Note is authenticated, the Note shall nevertheless be
valid.

         A Note shall not be valid until authenticated by the manual signature
of the Trustee. The signature shall be conclusive evidence that the Note has
been authenticated under this Indenture.

         The Trustee shall, upon a written order of the Company signed by one
Officer (an "Authentication Order"), authenticate Notes for original issue up
to the aggregate principal amount stated in paragraph 4 of the Notes, plus
Additional Notes issued pursuant to this Section 2.02 and Section 4.09 hereof.
The aggregate principal amount of Notes outstanding at any time may not exceed
such amount except as provided in Section 2.07 hereof.

         The Trustee may appoint an authenticating agent acceptable to the
Company to authenticate Notes. An authenticating agent may authenticate Notes
whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such agent. An
authenticating agent has the same rights as an Agent to deal with Holders or
an Affiliate of the Company.

Section 2.03   Registrar and Paying Agent.

         The Company shall maintain an office or agency where Notes may be
presented for registration of transfer or for exchange ("Registrar") and an
office or agency where Notes may be presented for payment ("Paying Agent").
The Registrar shall keep a register of the Notes and of their transfer and
exchange. The Company may appoint one or more co-registrars and one or more
additional paying agents. The term "Registrar" includes any co-registrar and
the term "Paying Agent" includes any


                                      25
<PAGE>


additional paying agent. The Company may change any Paying Agent or Registrar
without notice to any Holder. The Company shall notify the Trustee in writing
of the name and address of any Agent not a party to this Indenture. If the
Company fails to appoint or maintain another entity as Registrar or Paying
Agent, the Trustee shall act as such. The Company or any of its Subsidiaries
may act as Paying Agent or Registrar.

         The Company initially appoints The Depository Trust Company ("DTC")
to act as Depositary with respect to the Global Notes.

         The Company initially appoints the Trustee to act as the Registrar
and Paying Agent and to act as Note Custodian with respect to the Global
Notes.

Section 2.04   Paying Agent to Hold Money in Trust.

         The Company shall require each Paying Agent other than the Trustee to
agree in writing that the Paying Agent will hold in trust for the benefit of
Holders or the Trustee all money held by the Paying Agent for the payment of
principal, premium or Liquidated Damages, if any, or interest on the Notes,
and will notify the Trustee of any default by the Company in making any such
payment. While any such default continues, the Trustee may require a Paying
Agent to pay all money held by it to the Trustee. The Company at any time may
require a Paying Agent to pay all money held by it to the Trustee. Upon
payment over to the Trustee, the Paying Agent (if other than the Company or a
Subsidiary) shall have no further liability for the money. If the Company or a
Subsidiary acts as Paying Agent, it shall segregate and hold in a separate
trust fund for the benefit of the Holders all money held by it as Paying
Agent. Upon any bankruptcy or reorganization proceedings relating to the
Company, the Trustee shall serve as Paying Agent for the Notes.

Section 2.05   Holder Lists.

         The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
all Holders and shall otherwise comply with TIA ss. 312(a). If the Trustee is
not the Registrar, the Company shall furnish to the Trustee at least seven
Business Days before each interest payment date and at such other times as the
Trustee may request in writing, a list in such form and as of such date as the
Trustee may reasonably require of the names and addresses of the Holders of
Notes and the Company shall otherwise comply with TIA ss. 312(a).

Section 2.06   Transfer and Exchange.

         (a) Transfer and Exchange of Global Notes. A Global Note may not be
transferred as a whole except by the Depositary to a nominee of the
Depositary, by a nominee of the Depositary to the Depositary or to another
nominee of the Depositary, the Depositary or any such nominee to a successor
Depositary or a nominee of such successor Depositary. All Global Notes will be
exchanged by the Company for Definitive Notes if (i) the Company delivers to
the Trustee notice from the Depositary that it is unwilling or unable to
continue to act as Depositary or that it is no longer a clearing agency
registered under the Exchange Act and, in either case, a successor Depositary
is not appointed by the Company within 90 days after the date of such notice
from the Depositary, (ii) the Company in its sole discretion determines that
the Global Notes (in whole but not in part) should be exchanged for Definitive
Notes and delivers a written notice to such effect to the Trustee or (iii)
there shall have occurred and be continuing to occur a Default or Event of
Default with respect to the Notes; provided that in no event shall the
Regulation S Temporary Global Note be exchanged by the Company for Definitive
Notes prior to (x) the expiration of the Restricted Period and (y) the receipt
by the Registrar of any certificates required


                                      26
<PAGE>


pursuant to Rule 903(c)(3)(ii)(B) under the Securities Act. Upon the
occurrence of any of the preceding events in (i), (ii) or (iii) above,
Definitive Notes shall be issued in such names as the Depositary shall
instruct the Trustee. In addition, beneficial interests in a Global Note may
be exchanged for certificated Notes upon request but only upon at least 20
days' prior written notice given to the Trustee by or on behalf of DTC in
accordance with customary procedures. Global Notes also may be exchanged or
replaced, in whole or in part, as provided in Sections 2.07 and 2.10 hereof.
Every Note authenticated and delivered in exchange for, or in lieu of, a
Global Note or any portion thereof, pursuant to this Section 2.06 or Section
2.07 or 2.10 hereof, shall be authenticated and delivered in the form of, and
shall be, a Global Note, except as provided in this Section 2.06. A Global
Note may not be exchanged for another Note other than as provided in this
Section 2.06(a), however, beneficial interests in a Global Note may be
transferred and exchanged as provided in Section 2.06(b), (c) or (f) hereof.

         (b) Transfer and Exchange of Beneficial Interests in the Global Notes.
The transfer and exchange of beneficial interests in the Global Notes shall be
effected through the Depositary, in accordance with the provisions of this
Indenture and the Applicable Procedures. Beneficial interests in the
Restricted Global Notes shall be subject to restrictions on transfer
comparable to those set forth herein to the extent required by the Securities
Act. Transfers of beneficial interests in the Global Notes also shall require
compliance with either subparagraph (i) or (ii) below, as applicable, as well
as one or more of the other following subparagraphs, as applicable:

         (i)   Transfer of Beneficial Interests in the Same Global Note.
               Beneficial interests in any Restricted Global Note may be
               transferred to Persons who take delivery thereof in the form of
               a beneficial interest in the same Restricted Global Note in
               accordance with the transfer restrictions set forth in the
               Private Placement Legend; provided, however, that prior to the
               expiration of the Restricted Period, a beneficial interest in
               the Regulation S Temporary Global Note may be transferred to a
               person who takes delivery in the form of an interest in the
               corresponding 144A Global Note only upon receipt by the Trustee
               of a written certification from the transferor to the effect
               that such transfer is being made (i)(a) to a person whom the
               transferor reasonably believes is a QIB in a transaction
               meeting the requirements of Rule 144A or (b) pursuant to
               another exemption from the registration requirements under the
               Securities Act which is accompanied by an opinion of counsel
               regarding the availability of such exemption and (ii) in
               accordance with all applicable securities laws of any state of
               the United States or any other jurisdiction. Beneficial
               interests in any Unrestricted Global Note may be transferred to
               Persons who take delivery thereof in the form of a beneficial
               interest in an Unrestricted Global Note. No written orders or
               instructions shall be required to be delivered to the Registrar
               to effect the transfers described in this Section 2.06(b)(i).

        (ii)  All Other Transfers  and  Exchanges of Beneficial Interests in
               Global Notes. In connection with all transfers and exchanges of
               beneficial interests that are not subject to Section 2.06(b)(i)
               above, the transferor of such beneficial interest must deliver
               to the Registrar either (A) (1) a written order from a
               Participant or an Indirect Participant given to the Depositary
               in accordance with the Applicable Procedures directing the
               Depositary to credit or cause to be credited a beneficial
               interest in another Global Note in an amount equal to the
               beneficial interest to be transferred or exchanged and (2)
               instructions given in accordance with the Applicable Procedures
               containing information regarding the Participant account to be
               credited with such increase or (B) (1) a written order from a
               Participant or an Indirect Participant given to the Depositary
               in accordance with the Applicable Procedures directing the
               Depositary to cause to be issued a Definitive Note in an amount
               equal to the beneficial interest to be transferred or exchanged
               and (2) instructions given by the Depositary to the Registrar


                                      27
<PAGE>


               containing information regarding the Person in whose name such
               Definitive Note shall be registered to effect the transfer or
               exchange referred to in (1) above; provided that in no event
               shall Definitive Notes be issued upon the transfer or exchange
               of beneficial interests in the Regulation S Temporary Global
               Note prior to (x) the expiration of the Restricted Period and
               (y) the receipt by the Registrar of any certificates required
               pursuant to Rule 903 under the Securities Act. Upon
               consummation of an Exchange Offer by the Company in accordance
               with Section 2.06(f) hereof, the requirements of this Section
               2.06(b)(ii) shall be deemed to have been satisfied upon receipt
               by the Registrar of the instructions contained in the Letter of
               Transmittal delivered by the Holder of such beneficial
               interests in the Restricted Global Notes. Upon satisfaction of
               all of the requirements for transfer or exchange of beneficial
               interests in Global Notes contained in this Indenture and the
               Notes or otherwise applicable under the Securities Act, the
               Trustee shall adjust the principal amount of the relevant
               Global Note(s) pursuant to Section 2.06(h) hereof.

       (iii)   Transfer of Beneficial Interests to Another Restricted
               Global Note. A beneficial interest in any Restricted Global
               Note may be transferred to a Person who takes delivery thereof
               in the form of a beneficial interest in another Restricted
               Global Note if the transfer complies with the requirements of
               Section 2.06(b)(ii) above and the Registrar receives the
               following:

                         (A)  if the transferee will take delivery in the form
                    of a beneficial interest in the 144A Global Note, then the
                    transferor must deliver a certificate in the form of Exhibit
                    B hereto, including the certifications in item (1) thereof;
                    and

                         (B) if the transferee will take delivery in the form of
                    a beneficial interest in the Regulation S Temporary Global
                    Note or the Regulation S Global Note, then the transferor
                    must deliver a certificate in the form of Exhibit B hereto,
                    including the certifications in item (2) thereof and, if the
                    transfer occurs prior to the expiration of the Restricted
                    Period, the interest transferred shall be held immediately
                    thereafter through Euroclear or Cedelbank.

        (iv)   Transfer and Exchange of Beneficial Interests in a Restricted
               Global Note for Beneficial Interests in the Unrestricted Global
               Note. A beneficial interest in any Restricted Global Note may
               be exchanged by any holder thereof for a beneficial interest in
               an Unrestricted Global Note or transferred to a Person who
               takes delivery thereof in the form of a beneficial interest in
               an Unrestricted Global Note if the exchange or transfer
               complies with the requirements of Section 2.06(b)(ii) above
               and:

                         (A) such exchange or transfer is effected pursuant to
                    the Exchange Offer in accordance with the Registration
                    Rights Agreement and the holder of the beneficial interest
                    to be transferred, in the case of an exchange, or the
                    transferee, in the case of a transfer, certifies in the
                    applicable Letter of Transmittal that it is not (1) a
                    broker-dealer, (2) a Person participating in the
                    distribution of the Exchange Notes or (3) a Person who is
                    an affiliate (as defined in Rule 144) of the Company;

                         (B) such transfer is effected pursuant to the Shelf
                    Registration Statement in accordance with the Registration
                    Rights Agreement;


                                      28
<PAGE>


                         (C)  such transfer is effected by a Participating
                    Broker-Dealer pursuant to the Exchange Offer Registration
                    Statement in accordance with the Registration Rights
                    Agreement; or

                         (D) the Registrar receives the following:

                              (1) if the holder of such beneficial interest in a
                         Restricted Global Note proposes to exchange such
                         beneficial interest for a beneficial interest in an
                         Unrestricted Global Note, a certificate from such
                         holder in the form of Exhibit C hereto, including the
                         certifications in item (1)(a) thereof; or

                              (2) if the holder of such beneficial interest in a
                         Restricted Global Note proposes to transfer such
                         beneficial interest to a Person who shall take delivery
                         thereof in the form of a beneficial interest in an
                         Unrestricted Global Note, a certificate from such
                         holder in the form of Exhibit B hereto, including the
                         certifications in item (4) thereof,

         and, in each such case set forth in this subparagraph (D), if the
         Registrar so requests or if the Applicable Procedures so require, an
         Opinion of Counsel in form reasonably acceptable to the Registrar to
         the effect that such exchange or transfer is in compliance with the
         Securities Act and that the restrictions on transfer contained herein
         and in the Private Placement Legend are no longer required in order
         to maintain compliance with the Securities Act.

         If any such transfer is effected pursuant to subparagraph (B) or (D)
above at a time when an Unrestricted Global Note has not yet been issued, the
Company shall issue and, upon receipt of an Authentication Order in accordance
with Section 2.02 hereof, the Trustee shall authenticate one or more
Unrestricted Global Notes in an aggregate principal amount equal to the
aggregate principal amount of beneficial interests transferred pursuant to
subparagraph (B) or (D) above.

         Beneficial interests in an Unrestricted Global Note cannot be
exchanged for, or transferred to Persons who take delivery thereof in the form
of, a beneficial interest in a Restricted Global Note.

         (c)   Transfer or Exchange of Beneficial Interests for Definitive
               Notes.

                    (i)  Beneficial Interests in Restricted Global Notes to
               Restricted Definitive Notes. If any holder of a beneficial
               interest in a Restricted Global Note proposes to exchange such
               beneficial interest for a Restricted Definitive Note or to
               transfer such beneficial interest to a Person who takes
               delivery thereof in the form of a Restricted Definitive Note,
               then, upon receipt by the Registrar of the following
               documentation:

                         (A) if the holder of such beneficial interest in a
                    Restricted Global Note proposes to exchange such
                    beneficial interest for a Restricted Definitive Note, a
                    certificate from such holder in the form of Exhibit C
                    hereto, including the certifications in item (2)(a)
                    thereof;

                         (B) if such beneficial interest is being transferred
                    to a QIB in accordance with Rule 144A under the Securities
                    Act, a certificate to the effect set forth in Exhibit B
                    hereto, including the certifications in item (1) thereof;


                                      29
<PAGE>


                         (C) if such beneficial interest is being transferred
                    to a Non-U.S. Person in an offshore transaction in
                    accordance with Rule 903 or Rule 904 under the Securities
                    Act, a certificate to the effect set forth in Exhibit B
                    hereto, including the certifications in item (2) thereof;

                         (D) if such beneficial interest is being transferred
                    pursuant to an exemption from the registration
                    requirements of the Securities Act in accordance with Rule
                    144 under the Securities Act, a certificate to the effect
                    set forth in Exhibit B hereto, including the
                    certifications in item (3)(a) thereof;

                         (E) if such beneficial interest is being transferred to
                    an Institutional Accredited Investor in reliance on an
                    exemption from the registration requirements of the
                    Securities Act other than those listed in subparagraphs
                    (B) through (D) above, a certificate to the effect set
                    forth in Exhibit B hereto, including the certifications,
                    certificates and Opinion of Counsel required by item (3)
                    thereof, if applicable;

                         (F) if such beneficial interest is being transferred
                    to the Company or any of its Subsidiaries, a certificate
                    to the effect set forth in Exhibit B hereto, including the
                    certifications in item (3)(b) thereof; or

                         (G) if such beneficial interest is being transferred
                    pursuant to an effective registration statement under the
                    Securities Act, a certificate to the effect set forth in
                    Exhibit B hereto, including the certifications in item
                    (3)(c) thereof,

         the Trustee shall cause the aggregate principal amount of the
         applicable Global Note to be reduced accordingly pursuant to Section
         2.06(h) hereof, and the Company shall execute and the Trustee shall
         authenticate and deliver to the Person designated in the instructions
         a Definitive Note in the appropriate principal amount. Any Definitive
         Note issued in exchange for a beneficial interest in a Restricted
         Global Note pursuant to this Section 2.06(c) shall be registered in
         such name or names and in such authorized denomination or
         denominations as the holder of such beneficial interest shall
         instruct the Registrar through instructions from the Depositary and
         the Participant or Indirect Participant. The Trustee shall deliver
         such Definitive Notes to the Persons in whose names such Notes are so
         registered. Any Definitive Note issued in exchange for a beneficial
         interest in a Restricted Global Note pursuant to this Section
         2.06(c)(i) shall bear the Private Placement Legend and shall be
         subject to all restrictions on transfer contained therein.

                   (ii)  Notwithstanding Sections 2.06(c)(i)(A) and (C) hereof,
               a beneficial interest in the Regulation S Temporary Global Note
               may not be exchanged for a Definitive Note or transferred to a
               Person who takes delivery thereof in the form of a Definitive
               Note prior to (x) the expiration of the Restricted Period and
               (y) the receipt by the Registrar of any certificates required
               pursuant to Rule 903(c)(3)(ii)(B) under the Securities Act,
               except in the case of a transfer pursuant to an exemption from
               the registration requirements of the Securities Act other than
               Rule 903 or Rule 904.

                  (iii)  Beneficial Interests in Restricted Global Notes to
               Unrestricted Definitive Notes. A holder of a beneficial
               interest in a Restricted Global Note may exchange such
               beneficial interest for an Unrestricted Definitive Note or may
               transfer such beneficial interest to a Person who takes
               delivery thereof in the form of an Unrestricted Definitive Note
               only if:


                                      30
<PAGE>


                        (A)  such exchange or transfer is effected pursuant to
                    the Exchange Offer in accordance with the Registration
                    Rights Agreement and the holder of such beneficial
                    interest, in the case of an exchange, or the transferee,
                    in the case of a transfer, certifies in the applicable
                    Letter of Transmittal that it is not (1) a broker-dealer,
                    (2) a Person participating in the distribution of the
                    Exchange Notes or (3) a Person who is an affiliate (as
                    defined in Rule 144) of the Company;

                         (B) such transfer is effected pursuant to the Shelf
                    Registration Statement in accordance with the Registration
                    Rights Agreement;

                         (C) such transfer is effected by a Participating
                    Broker-Dealer pursuant to the Exchange Offer Registration
                    Statement in accordance with the Registration Rights
                    Agreement; or

                         (D) the Registrar receives the following:

                              (1)  if the holder of such beneficial interest in
                         a Restricted Global Note proposes to exchange such
                         beneficial interest for a Definitive Note that does
                         not bear the Private Placement Legend, a certificate
                         from such holder in the form of Exhibit C hereto,
                         including the certifications in item (1)(b) thereof;
                         or

                              (2) if the holder of such beneficial interest in a
                         Restricted Global Note proposes to transfer such
                         beneficial interest to a Person who shall take
                         delivery thereof in the form of a Definitive Note
                         that does not bear the Private Placement Legend, a
                         certificate from such holder in the form of Exhibit B
                         hereto, including the certifications in item (4)
                         thereof,

                         (E)  and, in each such case set forth in this
                    subparagraph (D), if the Registrar so requests or if the
                    Applicable Procedures so require, an Opinion of Counsel in
                    form reasonably acceptable to the Registrar to the effect
                    that such exchange or transfer is in compliance with the
                    Securities Act and that the restrictions on transfer
                    contained herein and in the Private Placement Legend are
                    no longer required in order to maintain compliance with
                    the Securities Act.

                    (iv)  Beneficial  Interests in Unrestricted  Global Notes to
               Unrestricted Definitive Notes. If any holder of a beneficial
               interest in an Unrestricted Global Note proposes to exchange
               such beneficial interest for a Definitive Note or to transfer
               such beneficial interest to a Person who takes delivery thereof
               in the form of a Definitive Note, then, upon satisfaction of
               the conditions set forth in Section 2.06(b)(ii) hereof, the
               Trustee shall cause the aggregate principal amount of the
               applicable Global Note to be reduced accordingly pursuant to
               Section 2.06(h) hereof, and the Company shall execute and the
               Trustee shall authenticate and deliver to the Person designated
               in the instructions a Definitive Note in the appropriate
               principal amount. Any Definitive Note issued in exchange for a
               beneficial interest pursuant to this Section 2.06(c)(iii) shall
               be registered in such name or names and in such authorized
               denomination or denominations as the holder of such beneficial
               interest shall instruct the Registrar through instructions from
               the Depositary and the Participant or Indirect Participant. The
               Trustee shall deliver such Definitive Notes to the Persons in
               whose names such Notes are so registered. Any Definitive Note
               issued in exchange for a beneficial interest pursuant to this
               Section 2.06(c)(iii) shall not bear the Private Placement
               Legend.


                                      31
<PAGE>

         (d)   Transfer and Exchange of Definitive Notes for Beneficial
Interests.

                    (i)  Restricted Definitive Notes to Beneficial Interests in
               Restricted Global Notes. If any Holder of a Restricted
               Definitive Note proposes to exchange such Note for a beneficial
               interest in a Restricted Global Note or to transfer such
               Restricted Definitive Notes to a Person who takes delivery
               thereof in the form of a beneficial interest in a Restricted
               Global Note, then, upon receipt by the Registrar of the
               following documentation:

                         (A)  if the Holder of such Restricted Definitive Note
                    proposes to exchange such Note for a beneficial interest in
                    a Restricted Global Note, a certificate from such Holder in
                    the form of Exhibit C hereto, including the certifications
                    in item (2)(b) thereof;

                         (B)  if such Restricted Definitive Note is being
                    transferred to a QIB in accordance with Rule 144A under
                    the Securities Act, a certificate to the effect set forth
                    in Exhibit B hereto, including the certifications in item
                    (1) thereof;

                         (C)  if such Restricted Definitive Note is being
                    transferred to a Non-U.S. Person in an offshore
                    transaction in accordance with Rule 903 or Rule 904 under
                    the Securities Act, a certificate to the effect set forth
                    in Exhibit B hereto, including the certifications in item
                    (2) thereof;

                         (D)  if such Restricted Definitive Note is being
                    transferred pursuant to an exemption from the registration
                    requirements of the Securities Act in accordance with Rule
                    144 under the Securities Act, a certificate to the effect
                    set forth in Exhibit B hereto, including the
                    certifications in item (3)(a) thereof;

                         (E)  if such Restricted Definitive Note is being
                    transferred to an Institutional Accredited Investor in
                    reliance on an exemption from the registration
                    requirements of the Securities Act other than those listed
                    in subparagraphs (B) through (D) above, a certificate to
                    the effect set forth in Exhibit B hereto, including the
                    certifications, certificates and Opinion of Counsel
                    required by item (3) thereof, if applicable;

                         (F) if such Restricted Definitive Note is being
                    transferred to the Company or any of its Subsidiaries, a
                    certificate to the effect set forth in Exhibit B hereto,
                    including the certifications in item (3)(b) thereof; or

                         (G)  if such Restricted Definitive Note is being
                    transferred pursuant to an effective registration
                    statement under the Securities Act, a certificate to the
                    effect set forth in Exhibit B hereto, including the
                    certifications in item (3)(c) thereof,

         the Trustee shall cancel the Restricted Definitive Note, increase or
         cause to be increased the aggregate principal amount of, in the case
         of clause (A) above, the appropriate Restricted Global Note, in the
         case of clause (B) above, the 144A Global Note, and in the case of
         clause (c) above, the Regulation S Global Note.

                   (ii)  Restricted Definitive Notes to Beneficial Interests in
               Unrestricted Global Notes. A Holder of a Restricted Definitive
               Note may exchange such Note for a beneficial interest in an
               Unrestricted Global Note or transfer such Restricted Definitive
               Note to a Person who takes delivery thereof in the form of a
               beneficial interest in an Unrestricted Global Note only if:


                                      32
<PAGE>


                         (A)  such exchange or transfer is effected pursuant to
                    the Exchange Offer in accordance with the Registration
                    Rights Agreement and the Holder, in the case of an
                    exchange, or the transferee, in the case of a transfer,
                    certifies in the applicable Letter of Transmittal that it
                    is not (1) a broker-dealer, (2) a Person participating in
                    the distribution of the Exchange Notes or (3) a Person who
                    is an affiliate (as defined in Rule 144) of the Company;

                         (B)  such transfer is effected pursuant to the Shelf
                    Registration Statement in accordance with the Registration
                    Rights Agreement;

                         (C)  such transfer is effected by a Participating
                    Broker-Dealer pursuant to the Exchange Offer Registration
                    Statement in accordance with the Registration Rights
                    Agreement; or

                         (D)  the Registrar receives the following:

                              (1) if the Holder of such Definitive Notes
                         proposes to exchange such Notes for a beneficial
                         interest in the Unrestricted Global Note, a
                         certificate from such Holder in the form of Exhibit C
                         hereto, including the certifications in item (1)(c)
                         thereof; or

                              (2) if the Holder of such  Definitive  Notes
                         proposes to transfer such Notes to a Person who shall
                         take delivery thereof in the form of a beneficial
                         interest in the Unrestricted Global Note, a
                         certificate from such Holder in the form of Exhibit B
                         hereto, including the certifications in item (4)
                         thereof,

         and, in each such case set forth in this subparagraph (D), if the
         Registrar so requests or if the Applicable Procedures so require, an
         Opinion of Counsel in form reasonably acceptable to the Registrar to
         the effect that such exchange or transfer is in compliance with the
         Securities Act and that the restrictions on transfer contained herein
         and in the Private Placement Legend are no longer required in order
         to maintain compliance with the Securities Act.

         Upon satisfaction of the conditions of any of the subparagraphs in
         this Section 2.06(d)(ii), the Trustee shall cancel the Definitive
         Notes and increase or cause to be increased the aggregate principal
         amount of the Unrestricted Global Note.

                  (iii)  Unrestricted Definitive Notes to Beneficial Interests
               in Unrestricted Global Notes. A Holder of an Unrestricted
               Definitive Note may exchange such Note for a beneficial
               interest in an Unrestricted Global Note or transfer such
               Definitive Notes to a Person who takes delivery thereof in the
               form of a beneficial interest in an Unrestricted Global Note at
               any time. Upon receipt of a request for such an exchange or
               transfer, the Trustee shall cancel the applicable Unrestricted
               Definitive Note and increase or cause to be increased the
               aggregate principal amount of one of the Unrestricted Global
               Notes.

         If any such exchange or transfer from a Definitive Note to a
beneficial interest is effected pursuant to subparagraphs (ii)(B), (ii)(D) or
(iii) above at a time when an Unrestricted Global Note has not yet been
issued, the Company shall issue and, upon receipt of an Authentication Order
in accordance with Section 2.02 hereof, the Trustee shall authenticate one or
more Unrestricted Global Notes in an aggregate principal amount equal to the
principal amount of Definitive Notes so transferred.


                                      33
<PAGE>


         (e) Transfer and Exchange of Definitive Notes for Definitive Notes.
Upon request by a Holder of Definitive Notes and such Holder's compliance with
the provisions of this Section 2.06(e), the Registrar shall register the
transfer or exchange of Definitive Notes. Prior to such registration of
transfer or exchange, the requesting Holder shall present or surrender to the
Registrar the Definitive Notes duly endorsed or accompanied by a written
instruction of transfer in form satisfactory to the Registrar duly executed by
such Holder or by his attorney, duly authorized in writing. In addition, the
requesting Holder shall provide any additional certifications, documents and
information, as applicable, required pursuant to the following provisions of
this Section 2.06(e).

               (i)  Restricted Definitive Notes to Restricted Definitive Notes.
         Any Restricted Definitive Note may be transferred to and registered
         in the name of Persons who take delivery thereof in the form of a
         Restricted Definitive Note if the Registrar receives the following:

                    (A)  if the transfer will be made pursuant to Rule 144A
               under the Securities Act, then the transferor must deliver a
               certificate in the form of Exhibit B hereto, including the
               certifications in item (1) thereof;

                    (B)  if the transfer will be made pursuant to Rule 903 or
               Rule 904, then the transferor must deliver a certificate in the
               form of Exhibit B hereto, including the certifications in item
               (2) thereof; and

                    (C)  if the transfer will be made pursuant to any other
               exemption from the registration requirements of the Securities
               Act, then the transferor must deliver a certificate in the form
               of Exhibit B hereto, including the certifications, certificates
               and Opinion of Counsel required by item (3) thereof, if
               applicable.

              (ii)  estricted Definitive Notes to Unrestricted Definitive Notes.
          Any Restricted Definitive Note may be exchanged by the Holder
          thereof for an Unrestricted Definitive Note or transferred to a
          Person or Persons who take delivery thereof in the form of an
          Unrestricted Definitive Note if:

                    (A)  such exchange or transfer is effected pursuant to the
               Exchange Offer in accordance with the Registration Rights
               Agreement and the Holder, in the case of an exchange, or the
               transferee, in the case of a transfer, certifies in the
               applicable Letter of Transmittal that it is not (1) a
               broker-dealer, (2) a Person participating in the distribution
               of the Exchange Notes or (3) a Person who is an affiliate (as
               defined in Rule 144) of the Company;

                    (B) any such transfer is effected pursuant to the Shelf
               Registration Statement in accordance with the Registration
               Rights Agreement;

                    (C)  any such transfer is effected by a Participating
               Broker-Dealer pursuant to the Exchange Offer Registration
               Statement in accordance with the Registration Rights Agreement;
               or

                    (D)  the Registrar receives the following:

                         (1)  if the Holder of such Restricted Definitive Notes
                    proposes to exchange such Notes for an Unrestricted
                    Definitive Note, a certificate from such

                                      34
<PAGE>


                    Holder in the form of Exhibit C hereto, including the
                    certifications in item (1)(d) thereof; or

                         (2)  f the Holder of such Restricted Definitive Notes
                    proposes to transfer such Notes to a Person who shall take
                    delivery thereof in the form of an Unrestricted Definitive
                    Note, a certificate from such Holder in the form of
                    Exhibit B hereto, including the certifications in item (4)
                    thereof;

         and, in each such case set forth in this subparagraph (D), if the
         Registrar so requests, an Opinion of Counsel in form reasonably
         acceptable to the Company to the effect that such exchange or
         transfer is in compliance with the Securities Act and that the
         restrictions on transfer contained herein and in the Private
         Placement Legend are no longer required in order to maintain
         compliance with the Securities Act.

             (iii)  Unrestricted Definitive Notes to Unrestricted Definitive
         Notes. A Holder of Unrestricted Definitive Notes may transfer such
         Notes to a Person who takes delivery thereof in the form of an
         Unrestricted Definitive Note. Upon receipt of a request to register
         such a transfer, the Registrar shall register the Unrestricted
         Definitive Notes pursuant to the instructions from the Holder
         thereof.

         (f) Exchange Offer. Upon the occurrence of the Exchange Offer in
accordance with the Registration Rights Agreement, the Company shall issue
and, upon receipt of an Authentication Order in accordance with Section 2.02,
the Trustee shall authenticate (i) one or more Unrestricted Global Notes in an
aggregate principal amount equal to the principal amount of the beneficial
interests in the Restricted Global Notes tendered for acceptance by Persons
that certify in the applicable Letters of Transmittal that (x) they are not
broker-dealers, (y) they are not participating in a distribution of the
Exchange Notes and (z) they are not affiliates (as defined in Rule 144) of the
Company, and accepted for exchange in the Exchange Offer and (ii) Definitive
Notes in an aggregate principal amount equal to the principal amount of the
Restricted Definitive Notes accepted for exchange in the Exchange Offer.
Concurrently with the issuance of such Notes, the Trustee shall cause the
aggregate principal amount of the applicable Restricted Global Notes to be
reduced accordingly, and the Company shall execute and the Trustee shall
authenticate and deliver to the Persons designated by the Holders of
Definitive Notes so accepted Definitive Notes in the appropriate principal
amount.

         (g) Legends. The following legends shall appear on the face of all
Global Notes and Definitive Notes issued under this Indenture unless
specifically stated otherwise in the applicable provisions of this Indenture.

               (i)  Private Placement Legend.

                    (A)  Except as permitted by subparagraph (B) below, each
               Global Note and each Definitive Note (and all Notes issued in
               exchange therefor or substitution thereof) shall bear the
               legend in substantially the following form:

         "THIS NOTE (OR ITS PREDECESSOR) HAS NOT BEEN REGISTERED UNDER THE
         UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
         ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED, SOLD, PLEDGED OR
         OTHERWISE TRANSFERRED WITHIN THE UNITED STATES OR TO, OR FOR THE
         ACCOUNT OR BENEFIT OF, UNITED STATES PERSONS, EXCEPT AS SET FORTH IN
         THE NEXT SENTENCE. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL
         INTEREST HEREIN,


                                      35
<PAGE>


         THE HOLDER: (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL
         BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) (A "QIB"),
         (B) IT HAS ACQUIRED THIS NOTE IN AN OFFSHORE TRANSACTION IN
         COMPLIANCE WITH REGULATION S UNDER THE SECURITIES ACT OR (C) IT IS AN
         INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(A) (1),
         (2), (3) OR (7) OR REGULATION D UNDER THE SECURITIES ACT (AN "IAI")),
         (2) AGREES THAT IT WILL NOT RESELL OR OTHERWISE TRANSFER THIS NOTE
         EXCEPT (A) TO THE COMPANY OR ANY OF ITS SUBSIDIARIES, (B) TO A PERSON
         WHOM THE SELLER REASONABLY BELIEVES IS A QIB PURCHASING FOR ITS OWN
         ACCOUNT OR FOR THE ACCOUNT OF A QIB IN A TRANSACTION MEETING THE
         REQUIREMENTS OF RULE 144A, (C) IN AN OFFSHORE TRANSACTION MEETING THE
         REQUIREMENTS OF RULE 903 OR RULE 904 OF REGULATION S OF THE
         SECURITIES ACT, (D) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE
         144 UNDER THE SECURITIES ACT, (E) TO AN IAI THAT, PRIOR TO SUCH
         TRANSFER, FURNISHES THE TRUSTEE A SIGNED LETTER CONTAINING CERTAIN
         REPRESENTATIONS AND AGREEMENTS RELATING TO THE TRANSFER OF THIS NOTE
         (THE FORM OF WHICH CAN BE OBTAINED FROM THE TRUSTEE) AND, IF SUCH
         TRANSFER IS IN RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT OF NOTES LESS
         THAN $250,000, AN OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY THAT
         SUCH TRANSFER IS IN COMPLIANCE WITH THE SECURITIES ACT, (F) IN
         ACCORDANCE WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS
         OF THE SECURITIES ACT (AND BASED UPON AN OPINION OF COUNSEL
         ACCEPTABLE TO THE COMPANY) OR (G) PURSUANT TO AN EFFECTIVE
         REGISTRATION STATEMENT AND, IN EACH CASE, IN ACCORDANCE WITH THE
         APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY
         OTHER APPLICABLE JURISDICTION AND (3) AGREES THAT IT WILL DELIVER TO
         EACH PERSON TO WHOM THIS NOTE OR AN INTEREST HEREIN IS TRANSFERRED A
         NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND. AS USED HEREIN,
         THE TERMS "OFFSHORE TRANSACTION" AND "UNITED STATES" HAVE THE
         MEANINGS GIVEN TO THEM BY RULE 902 OF REGULATION S UNDER THE
         SECURITIES ACT. THE INDENTURE CONTAINS A PROVISION REQUIRING THE
         TRUSTEE TO REFUSE TO REGISTER ANY TRANSFER OF THIS NOTE IN VIOLATION
         OF THE FOREGOING."

                    (B)  Notwithstanding the foregoing, any Global Note or
               Definitive Note issued pursuant to subparagraphs (b)(iv),
               (c)(iii), c(iv), (d)(ii), (d)(iii), (e)(ii), (e)(iii) or (f) to
               this Section 2.06 (and all Notes issued in exchange therefor or
               substitution thereof) shall not bear the Private Placement
               Legend.

              (ii) Global Note Legend. Each Global Note shall bear a legend in
         substantially the following form:

               "THIS GLOBAL NOTE IS HELD BY THE DEPOSITARY (AS DEFINED IN THE
               INDENTURE GOVERNING THIS NOTE) OR ITS NOMINEE IN CUSTODY FOR THE
               BENEFIT OF THE BENEFICIAL OWNERS HEREOF, AND IS NOT TRANSFERABLE
               TO ANY PERSON UNDER ANY CIRCUMSTANCES EXCEPT THAT (I) THE
               TRUSTEE MAY MAKE SUCH NOTATIONS HEREON AS MAY BE REQUIRED
               PURSUANT TO SECTION 2.07 OF THE INDENTURE, (II) THIS GLOBAL NOTE
               MAY BE EXCHANGED IN WHOLE BUT NOT IN PART PURSUANT TO SECTION
               2.06(a) OF THE INDENTURE, (III) THIS GLOBAL NOTE MAY BE
               DELIVERED TO THE


                                      36
<PAGE>


               TRUSTEE FOR CANCELLATION PURSUANT TO SECTION 2.11 OF THE
               INDENTURE AND (IV) THIS GLOBAL NOTE MAY BE TRANSFERRED TO A
               SUCCESSOR DEPOSITARY WITH THE PRIOR WRITTEN CONSENT OF CHARLES
               RIVER LABORATORIES, INC."

             (iii)  Regulation S Temporary Global Note Legend. The Regulation S
         Temporary Global Note shall bear a legend in substantially the
         following form:

               "THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL
               NOTE, AND THE CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE
               FOR CERTIFICATED NOTES, ARE AS SPECIFIED IN THE INDENTURE (AS
               DEFINED HEREIN). NEITHER THE HOLDER NOR THE BENEFICIAL OWNERS OF
               THIS REGULATION S TEMPORARY GLOBAL NOTE SHALL BE ENTITLED TO
               RECEIVE PAYMENT OF INTEREST HEREON."

         (h) Cancellation and/or Adjustment of Global Notes. At such time as all
beneficial interests in a particular Global Note have been exchanged for
Definitive Notes or a particular Global Note has been redeemed, repurchased or
cancelled in whole and not in part, each such Global Note shall be returned to
or retained and cancelled by the Trustee in accordance with Section 2.11
hereof. At any time prior to such cancellation, if any beneficial interest in
a Global Note is exchanged for or transferred to a Person who will take
delivery thereof in the form of a beneficial interest in another Global Note
or for Definitive Notes, the principal amount of Notes represented by such
Global Note shall be reduced accordingly and an endorsement shall be made on
such Global Note by the Trustee or by the Depositary at the direction of the
Trustee to reflect such reduction; and if the beneficial interest is being
exchanged for or transferred to a Person who will take delivery thereof in the
form of a beneficial interest in another Global Note, such other Global Note
shall be increased accordingly and an endorsement shall be made on such Global
Note by the Trustee or by the Depositary at the direction of the Trustee to
reflect such increase.

         (i)  General Provisions Relating to Transfers and Exchanges.

               (i)  To permit registrations of transfers and exchanges, the
         Company shall execute and the Trustee shall authenticate Global Notes
         and Definitive Notes upon the Company's order or at the Registrar's
         request.

              (ii)  No service charge shall be made to a holder of a beneficial
         interest in a Global Note or to a Holder of a Definitive Note for any
         registration of transfer or exchange, but the Company may require
         payment of a sum sufficient to cover any transfer tax or similar
         governmental charge payable in connection therewith (other than any
         such transfer taxes or similar governmental charge payable upon
         exchange or transfer pursuant to Sections 3.06, 3.09, 4.10 and 4.14
         hereof).

             (iii)  The Registrar shall not be required to register the transfer
         of or exchange any Note selected for redemption in whole or in part,
         except the unredeemed portion of any Note being redeemed in part.

              (iv)  All Global Notes and Definitive Notes issued upon any
         registration of transfer or exchange of Global Notes or Definitive
         Notes shall be the valid obligations of the Company, evidencing the
         same debt, and entitled to the same benefits under this Indenture, as
         the Global Notes or Definitive Notes surrendered upon such
         registration of transfer or exchange.


                                      37
<PAGE>


               (v)  The Company shall not be required (A) to issue, to register
         the transfer of or to exchange any Notes during a period beginning at
         the opening of business 15 days before the day of any selection of
         Notes for redemption under Section 3.02 hereof and ending at the
         close of business on the day of selection, (B) to register the
         transfer of or to exchange any Note so selected for redemption in
         whole or in part, except the unredeemed portion of any Note being
         redeemed in part or (c) to register the transfer of or to exchange a
         Note between a record date and the next succeeding Interest Payment
         Date.

              (vi)  Prior to due presentment for the registration of a transfer
         of any Note, the Trustee, any Agent and the Company may deem and
         treat the Person in whose name any Note is registered as the absolute
         owner of such Note for the purpose of receiving payment of principal
         of and interest and Liquidated Damages, if any, on such Notes and for
         all other purposes, and none of the Trustee, any Agent or the Company
         shall be affected by notice to the contrary.

             (vii)  The Trustee shall authenticate Global Notes and Definitive
         Notes in accordance with the provisions of Section 2.02 hereof.

            (viii)       All certifications, certificates and Opinions of
         Counsel required to be submitted to the Registrar pursuant to this
         Section 2.06 to effect a registration of transfer or exchange may be
         submitted by facsimile.

Section 2.07   Replacement Notes.

         If any mutilated Note is surrendered to the Trustee or the Company
and the Trustee receives evidence to its satisfaction of the destruction, loss
or theft of any Note, the Company shall issue and the Trustee, upon receipt of
an Authentication Order, shall authenticate a replacement Note if the
Trustee's requirements are met. If required by the Trustee or the Company, an
indemnity bond must be supplied by the Holder that is sufficient in the
judgment of the Trustee and the Company to protect the Company, the Trustee,
any Agent and any authenticating agent from any loss that any of them may
suffer if a Note is replaced. The Company may charge for its expenses in
replacing a Note.

         Every replacement Note is an additional obligation of the Company and
shall be entitled to all of the benefits of this Indenture equally and
proportionately with all other Notes duly issued hereunder.

Section 2.08      Outstanding Notes.

         The Notes outstanding at any time are all the Notes authenticated by
the Trustee except for those cancelled by it, those delivered to it for
cancellation, those reductions in the interest in a Global Note effected by
the Trustee in accordance with the provisions hereof, and those described in
this Section as not outstanding. Except as set forth in Section 2.09 hereof, a
Note does not cease to be outstanding because the Company or an Affiliate of
the Company holds the Note; however, Notes held by the Company or a Subsidiary
of the Company shall not be deemed to be outstanding for purposes of Section
3.07 hereof.

         If a Note is replaced pursuant to Section 2.07 hereof, it ceases to
be outstanding unless the Trustee receives proof satisfactory to it that the
replaced Note is held by a bona fide purchaser.


                                      38
<PAGE>


         If the principal  amount of any Note is considered  paid under Section
4.01 hereof, it ceases to be outstanding and interest on it ceases to accrue.

         If the Paying Agent (other than the Company, a Subsidiary or an
Affiliate of any thereof) holds, on a redemption date or maturity date, money
sufficient to pay Notes payable on that date, then on and after that date such
Notes shall be deemed to be no longer outstanding and shall cease to accrue
interest.

Section 2.09   Treasury Notes.

         In determining whether the Holders of the required principal amount
of Notes have concurred in any direction, waiver or consent, Notes owned by
the Company, or by any Person directly or indirectly controlling or controlled
by or under direct or indirect common control with the Company, shall be
considered as though not outstanding, except that for the purposes of
determining whether the Trustee shall be protected in relying on any such
direction, waiver or consent, only Notes that the Trustee knows are so owned
shall be so disregarded.

Section 2.10   Temporary Notes.

         Until certificates representing Notes are ready for delivery, the
Company may prepare and the Trustee, upon receipt of an Authentication Order,
shall authenticate temporary Notes. Temporary Notes shall be substantially in
the form of certificated Notes but may have variations that the Company
considers appropriate for temporary Notes and as shall be reasonably
acceptable to the Trustee. Without unreasonable delay, the Company shall
prepare and the Trustee shall, as soon as practicable upon receipt of the
written order of the Company signed by an Officer of the Company, authenticate
definitive Notes in exchange for temporary Notes.

         Holders of temporary Notes shall be entitled to all of the benefits
of this Indenture.

Section 2.11   Cancellation.

         The Company at any time may deliver Notes to the Trustee for
cancellation. The Registrar and Paying Agent shall forward to the Trustee any
Notes surrendered to them for registration of transfer, exchange or payment.
The Trustee and no one else shall cancel all Notes surrendered for
registration of transfer, exchange, payment, replacement or cancellation and
shall destroy cancelled Notes (subject to the record retention requirement of
the Exchange Act). Certification of the destruction of all cancelled Notes
shall be delivered to the Company. The Company may not issue new Notes to
replace Notes that it has paid or that have been delivered to the Trustee for
cancellation.

Section 2.12   Defaulted Interest.

         If the Company defaults in a payment of interest on the Notes, it
shall pay the defaulted interest in any lawful manner plus, to the extent
lawful, interest payable on the defaulted interest, to the Persons who are
Holders on a subsequent special record date, in each case at the rate provided
in the Notes and in Section 4.01 hereof. The Company shall notify the Trustee
in writing of the amount of defaulted interest proposed to be paid on each
Note and the date of the proposed payment. The Company shall fix or cause to
be fixed each such special record date and payment date, provided that no such
special record date shall be less than 10 days prior to the related payment
date for such defaulted interest. At least 15 days before the special record
date, the Company (or, upon the written request of the Company, the Trustee in
the name and at the expense of the Company) shall mail or cause to be mailed
to Holders a notice that states the special record date, the related payment
date and the amount of such interest to be paid.


                                      39
<PAGE>


                                  ARTICLE 3
                           REDEMPTION AND PREPAYMENT

Section 3.01   Notices to Trustee.

         If the Company elects to redeem Notes pursuant to the optional
redemption provisions of Section 3.07 hereof, it shall furnish to the Trustee,
at least 30 days but not more than 60 days before a redemption date, an
Officers' Certificate setting forth (i) the clause of this Indenture pursuant
to which the redemption shall occur, (ii) the redemption date, (iii) the
principal amount of Notes to be redeemed and (iv) the redemption price.

Section 3.02   Selection of Notes to Be Redeemed.

         If less than all of the Notes are to be redeemed at any time,
selection of Notes for redemption will be made by the Trustee in compliance
with the requirements of the principal national securities exchange, if any,
on which the Notes are listed, or, if the Notes are not so listed, on a pro
rata basis, by lot or by another method as the Trustee shall deem fair and
appropriate; provided that no Notes of $1,000 or less shall be redeemed in
part.

         The Trustee shall promptly notify the Company in writing of the Notes
selected for redemption and, in the case of any Note selected for partial
redemption, the principal amount thereof to be redeemed. Notes and portions of
Notes selected shall be in amounts of $1,000 or whole multiples of $1,000;
except that if all of the Notes of a Holder are to be redeemed, the entire
outstanding amount of Notes held by such Holder, even if not a multiple of
$1,000, shall be redeemed. Except as provided in the preceding sentence,
provisions of this Indenture that apply to Notes called for redemption also
apply to portions of Notes called for redemption.

Section 3.03   Notice of Redemption.

         Subject to the provisions of Section 3.09 hereof, notices of
redemption shall be mailed by first class mail at least 30 but not more than
60 days before the redemption date to each Holder of Notes to be redeemed at
its registered address. If any Note is to be redeemed in part only, the notice
of redemption that relates to that Note shall state the portion of the
principal amount thereof to be redeemed. A new Note in principal amount equal
to the unredeemed portion thereof will be issued in the name of the Holder
thereof upon cancellation of the original Note. Notes called for redemption
become due on the date fixed for redemption. On and after the redemption date,
interest ceases to accrue on Notes or portions of them called for redemption.

         The notice shall identify the Notes to be redeemed and shall state:

         (a)   the redemption date;

         (b)   the redemption price;

         (c) if any Note is being redeemed in part, the portion of the principal
amount of such Note to be redeemed and that, after the redemption date upon
surrender of such Note, a new Note or Notes in principal amount equal to the
unredeemed portion shall be issued upon cancellation of the original Note;

         (d)   the name and address of the Paying Agent;

                                      40
<PAGE>


         (e)   that Notes called for redemption must be surrendered to the
Paying Agent to collect the redemption price;

         (f)   that, unless the Company defaults in making such redemption
payment, interest on Notes called for redemption ceases to accrue on and after
the redemption date;

         (g)   the paragraph of the Notes and/or Section of this Indenture
pursuant to which the Notes called for redemption are being redeemed; and

         (h)   that no  representation  is made as to the correctness or
accuracy of the CUSIP number, if any, listed in such notice or printed on the
Notes.

         At the Company's request, the Trustee shall give the notice of
redemption in the Company's name and at its expense; provided, however, that
the Company shall have delivered to the Trustee, at least 45 days prior to the
redemption date, an Officers' Certificate requesting that the Trustee give
such notice and setting forth the information to be stated in such notice as
provided in the preceding paragraph.

Section 3.04   Effect of Notice of Redemption.

         Once notice of redemption is mailed in accordance with Section 3.03
hereof, Notes called for redemption become irrevocably due and payable on the
redemption date at the redemption price. A notice of redemption may not be
conditional.

Section 3.05   Deposit of Redemption Price.

         One Business Day prior to the redemption date, the Company shall
deposit with the Trustee or with the Paying Agent money sufficient to pay the
redemption price of and accrued interest on all Notes to be redeemed on that
date. The Trustee or the Paying Agent shall promptly return to the Company any
money deposited with the Trustee or the Paying Agent by the Company in excess
of the amounts necessary to pay the redemption price of, and accrued interest
on, all Notes to be redeemed.

         If the Company complies with the provisions of the preceding
paragraph, on and after the redemption date, interest shall cease to accrue on
the Notes or the portions of Notes called for redemption. If a Note is
redeemed on or after an interest record date but on or prior to the related
interest payment date, then any accrued and unpaid interest shall be paid to
the Person in whose name such Note was registered at the close of business on
such record date. If any Note called for redemption shall not be so paid upon
surrender for redemption because of the failure of the Company to comply with
the preceding paragraph, interest shall be paid on the unpaid principal, from
the redemption date until such principal is paid, and to the extent lawful on
any interest and Liquidated Damages, if any, not paid on such unpaid
principal, in each case at the rate provided in the Notes and in Section 4.01
hereof.

Section 3.06   Notes Redeemed in Part.

         Upon surrender of a Note that is redeemed in part, the Company shall
issue and, upon the Company's written request, the Trustee shall authenticate
for the Holder at the expense of the Company a new Note equal in principal
amount to the unredeemed portion of the Note surrendered.


                                      41
<PAGE>


Section 3.07   Optional Redemption.

(a) Except as provided below, the Notes will not be redeemable at the
Company's option prior to October 1, 2004. Thereafter, the Notes will be
subject to redemption at any time at the option of the Company, in whole or in
part, upon not less than 30 nor more than 60 days' notice, in cash at the
redemption prices (expressed as percentages of principal amount) set forth
below, plus accrued and unpaid interest and Liquidated Damages, if any,
thereon to the applicable redemption date, if redeemed during the twelve-month
period beginning on October 1 of the years indicated below:

      Year                                                      Percentage
      ----                                                      ----------
      2004......................................................106.750%
      2005......................................................104.500%
      2006......................................................102.250%
      2007 and thereafter.......................................100.000%

         Notwithstanding the foregoing, on or prior to October 1, 2002, the
Company may redeem up to 35% of the aggregate principal amount of Notes from
time to time originally issued under this Indenture in cash at a redemption
price of 113.500%% of the principal amount thereof, plus accrued and unpaid
interest and Liquidated Damages, if any, thereon to the redemption date, with
the net cash proceeds of one or more Public Equity Offerings; provided that at
least 65% of the aggregate principal amount of Notes from time to time
originally issued under this Indenture remains outstanding immediately after
the occurrence of the redemption; and provided further that the redemption
shall occur within 90 days of the date of the closing of any such Public
Equity Offering.

         (b)   Any redemption pursuant to this Section 3.07 shall be made
pursuant to the provisions of Section 3.01 through 3.06 hereof.

Section 3.08   Mandatory Redemption.

         The Company is not required to make mandatory redemption of, or
sinking fund payments with respect to, the Notes.

Section 3.09   Offer to Purchase by Application of Excess Proceeds.

         In the event that,  pursuant to Section 4.10 hereof, the Company shall
be required to commence an Asset Sale Offer, it shall follow the procedures
specified below.

         The Asset Sale Offer shall remain open for a period of 20 Business
Days following its commencement and no longer, except to the extent that a
longer period is required by applicable law (the "Offer Period"). No later
than five Business Days after the termination of the Offer Period (the
"Purchase Date"), the Company shall purchase the principal amount of Notes
required to be purchased pursuant to Section 4.10 hereof (the "Offer Amount")
or, if less than the Offer Amount has been tendered, all Notes tendered in
response to the Asset Sale Offer. Payment for any Notes so purchased shall be
made in the same manner as interest payments are made.

         If the Purchase Date is on or after an interest record date and on or
before the related interest payment date, any accrued and unpaid interest
shall be paid to the Person in whose name a Note is

                                      42
<PAGE>


registered at the close of business on such record date, and no additional
interest shall be payable to Holders who tender Notes pursuant to the Asset Sale
Offer.

         Upon the commencement of an Asset Sale Offer, the Company shall send,
by first class mail, a notice to the Trustee and each of the Holders, with a
copy to the Trustee. The notice shall contain all instructions and materials
necessary to enable such Holders to tender Notes pursuant to the Asset Sale
Offer. The Asset Sale Offer shall be made to all Holders. The notice, which
shall govern the terms of the Asset Sale Offer, shall state:

         (a)   that the Asset Sale Offer is being made pursuant to this Section
3.09 and Section 4.10 hereof and the length of time the Asset Sale Offer shall
remain open;

         (b)   the Offer Amount, the purchase price and the Purchase Date;

         (c)   that any Note not tendered or accepted for payment shall continue
to accrete or accrue interest;

         (d)   that, unless the Company defaults in making such payment, any
Note accepted for payment pursuant to the Asset Sale Offer shall cease to
accrete or accrue interest after the Purchase Date;

         (e) that Holders electing to have a Note purchased pursuant to an
Asset Sale Offer may only elect to have all of such Note purchased and may not
elect to have only a portion of such Note purchased;

         (f) that Holders electing to have a Note purchased pursuant to any
Asset Sale Offer shall be required to surrender the Note, with the form
entitled "Option of Holder to Elect Purchase" on the reverse of the Note
completed, or transfer by book-entry transfer, to the Company, a depositary,
if appointed by the Company, or a Paying Agent at the address specified in the
notice at least three days before the Purchase Date;

         (g)   that Holders shall be entitled to withdraw their election if the
Company, the Depositary or the Paying Agent, as the case may be, receives, not
later than the expiration of the Offer Period, a telegram, telex, facsimile
transmission or letter setting forth the name of the Holder, the principal
amount of the Note the Holder delivered for purchase and a statement that such
Holder is withdrawing his election to have such Note purchased;

         (h)   that, if the aggregate principal amount of Notes surrendered by
Holders exceeds the Offer Amount, the Company shall select the Notes to be
purchased on a pro rata basis (with such adjustments as may be deemed
appropriate by the Company so that only Notes in denominations of $1,000, or
integral multiples thereof, shall be purchased); and

          (i) that Holders whose Notes were purchased only in part shall be
issued new Notes equal in principal amount to the unpurchased portion of the
Notes surrendered (or transferred by book-entry transfer).

         On or before the Purchase Date, the Company shall, to the extent
lawful, accept for payment, on a pro rata basis to the extent necessary, the
Offer Amount of Notes or portions thereof tendered pursuant to the Asset Sale
Offer, or if less than the Offer Amount has been tendered, all Notes tendered,
and shall deliver to the Trustee an Officers' Certificate stating that such
Notes or portions thereof were accepted for payment by the Company in
accordance with the terms of this Section 3.09. The Company, the


                                      43
<PAGE>


Depositary or the Paying Agent, as the case may be, shall promptly (but in any
case not later than five days after the Purchase Date) mail or deliver to each
tendering Holder an amount equal to the purchase price of the Notes tendered
by such Holder and accepted by the Company for purchase, and the Company shall
promptly issue a new Note, and the Trustee, upon written request from the
Company shall authenticate and mail or deliver such new Note to such Holder,
in a principal amount equal to any unpurchased portion of the Note
surrendered. Any Note not so accepted shall be promptly mailed or delivered by
the Company to the Holder thereof. The Company shall publicly announce the
results of the Asset Sale Offer on the Purchase Date.

         Other than as specifically provided in this Section 3.09, any
purchase pursuant to this Section 3.09 shall be made pursuant to the
provisions of Sections 3.01 through 3.06 hereof.


                                   ARTICLE 4
                                   COVENANTS

Section 4.01   Payment of Notes.

         The Company shall pay or cause to be paid the principal of, premium,
if any, and interest on the Notes on the dates and in the manner provided in
the Notes. Interest on the Notes will accrue at the rate of 13.5% per year;
provided that the rate at which interest accrues will increase to 14.0% per
year on August 15, 2000 in the event that the Ratio of Consolidated Net Debt
to Consolidated Cash Flow for the Company as of June 30, 2000 is equal to or
greater than 5.00 to 1. Principal, premium, if any, and interest shall be
considered paid on the date due if the Paying Agent, if other than the Company
or a Subsidiary thereof, (i) holds as of 10:00 a.m. Eastern Time on the due
date money deposited by the Company in immediately available funds and
designated for and sufficient to pay all principal, premium, if any, and
interest then due and (ii) is not prohibited from paying such money to the
Holders pursuant to the terms of this Indenture or the Notes. The Company
shall pay all Liquidated Damages, if any, in the same manner on the dates and
in the amounts set forth in the Registration Rights Agreement.

         The Company shall pay interest (including post-petition interest in
any proceeding under any Bankruptcy Law) on overdue principal at the rate
equal to 1% per annum in excess of the then applicable interest rate on the
Notes to the extent lawful; and shall pay interest (including post-petition
interest in any proceeding under any Bankruptcy Law) on overdue installments
of interest and Liquidated Damages (without regard to any applicable grace
period) at the same rate to the extent lawful.

Section 4.02   Maintenance of Office or Agency.

         The Company shall maintain in the Borough of Manhattan, the City of
New York, an office or agency (which may be an office of the Trustee or an
Affiliate of the Trustee, Registrar or co-registrar) where Notes may be
surrendered for registration of transfer or for exchange and where notices and
demands to or upon the Company in respect of the Notes and this Indenture may
be served. The Company shall give prompt written notice to the Trustee of the
location, and any change in the location, of such office or agency. If at any
time the Company shall fail to maintain any such required office or agency or
shall fail to furnish the Trustee with the address thereof, such
presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office of the Trustee.

         The Company may also from time to time designate one or more other
offices or agencies where the Notes may be presented or surrendered for any or
all such purposes and may from time to time rescind such designations;
provided, however, that no such designation or rescission shall in any manner
relieve the Company of its obligation to maintain an office or agency in the
Borough of Manhattan, the City of

                                      44
<PAGE>


New York for such purposes. The Company shall give prompt written notice to
the Trustee of any such designation or rescission and of any change in the
location of any such other office or agency.

         The Company hereby designates the Corporate Trust Office of the
Trustee as one such office or agency of the Company in accordance with Section
2.03 hereof.

Section 4.03   Reports.

         Whether or not required by the rules and regulations of the
Commission, so long as any Notes are outstanding, the Company will furnish to
the Holders of Notes (a) all quarterly and annual financial information that
would be required to be contained in a filing with the Commission on Forms
10-Q and 10-K if the Company were required to file those Forms, including a
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and, with respect to the annual information only, a report thereon
by the Company's certified independent accountants; and (b) all current
reports that would be required to be filed with the Commission on Form 8-K if
the Company were required to file those reports, in each case, within the time
periods specified in the Commission's rules and regulations.

         In addition, following the consummation of the Exchange Offer
contemplated by the Registration Rights Agreement, whether or not required by
the rules and regulations of the Commission, the Company will file a copy of
all such information and reports referred to in clauses (a) and (b) above with
the Commission for public availability within the time periods specified in
the Commission's rules and regulations (unless the Commission will not accept
such a filing) and make such information available to securities analysts and
prospective investors upon request.

         In addition, the Company and the Guarantors have agreed that, for so
long as any Notes remain outstanding, they will furnish to the Holders and to
securities analysts and prospective investors, upon their request, the
information required to be delivered pursuant to Rule 144A(d)(4) under the
Securities Act.

Section 4.04   Compliance Certificate.

(a) The Company shall deliver to the Trustee, within 90 days after the end of
each fiscal year, an Officers' Certificate stating that a review of the
activities of the Company and its Subsidiaries during the preceding fiscal
year have been made under the supervision of the signing Officers with a view
to determining whether the Company have kept, observed, performed and
fulfilled its obligations under this Indenture, and further stating, as to
each such Officer signing such certificate, that to the best of his or her
knowledge the Company has kept, observed, performed and fulfilled each and
every covenant contained in this Indenture and is not in default in the
performance or observance of any of the terms, provisions and conditions of
this Indenture (or, if a Default or Event of Default shall have occurred,
describing all such Defaults or Events of Default of which he or she may have
knowledge and what action the Company is taking or propose to take with
respect thereto) and that to the best of his or her knowledge no event has
occurred and remains in existence by reason of which payments on account of
the principal of or interest or Liquidated Damages, if any, on the Notes is
prohibited or if such event has occurred, a description of the event and what
action the Company is taking or proposes to take with respect thereto.

         (b) So long as not contrary to the then current recommendations of
the American Institute of Certified Public Accountants, the year-end financial
statements delivered pursuant to Section 4.03(a) above shall be accompanied by
a written statement of the Company's independent public accountants (which
shall be a firm of established national reputation) that in making the
examination necessary for certification of such financial statements, nothing
has come to their attention that would lead them to believe that the Company
has violated any provisions of Article 4 or Article 5 hereof or, if any such


                                      45
<PAGE>


violation has occurred, specifying the nature and period of existence thereof,
it being understood that such accountants shall not be liable directly or
indirectly to any Person for any failure to obtain knowledge of any such
violation.

         (c) The Company shall, so long as any of the Notes are outstanding,
deliver to the Trustee, forthwith upon any Officer becoming aware of any
Default or Event of Default, an Officers' Certificate specifying such Default
or Event of Default and what action the Company is taking or proposes to take
with respect thereto.

Section 4.05   Taxes.

         The Company shall pay, and shall cause each of its Subsidiaries to
pay, prior to delinquency, all material taxes, assessments, and governmental
levies except such as are contested in good faith and by appropriate
proceedings or where the failure to effect such payment is not adverse in any
material respect to the Holders of the Notes.

Section 4.06   Stay, Extension and Usury Laws.

         The Company covenants that (to the extent permitted by law) it shall
not at any time insist upon, plead, or in any manner whatsoever claim or take
the benefit or advantage of, any stay, extension or usury law wherever
enacted, now or at any time hereafter in force, that may affect the covenants
or the performance of this Indenture; and the Company hereby expressly waives
(to the extent permitted by law) all benefit or advantage of any such law, and
covenants that (to the extent permitted by law) it shall not, by resort to any
such law, hinder, delay or impede the execution of any power herein granted to
the Trustee, but shall suffer and permit the execution of every such power as
though no such law has been enacted.

Section 4.07   Restricted Payments.

         The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, (1) declare or pay any dividend or
make any other payment or distribution on account of the Company's or any of
its Restricted Subsidiaries' Equity Interests other than dividends or
distributions payable in Equity Interests other than Disqualified Stock of the
Company or dividends or distributions payable to the Company or any Wholly
Owned Restricted Subsidiary of the Company; (2) purchase, redeem or otherwise
acquire or retire for value any Equity Interests of the Company or Parent
other than any of those Equity Interests owned by the Company or any
Restricted Subsidiary of the Company; (3) make any principal payment on or
with respect to, or purchase, redeem, defease or otherwise acquire or retire
for value, any Indebtedness of the Company that is subordinated in right of
payment to the Notes, except in accordance with the mandatory redemption or
repayment provisions set forth in the original documentation governing that
Indebtedness (but not pursuant to any mandatory offer to repurchase upon the
occurrence of any event); or (4) make any Restricted Investment (all payments
and other actions set forth in clauses (1) through (4) above being
collectively referred to as "Restricted Payments"), unless, at the time of and
after giving effect to such Restricted Payment:

                    (i)  no Default or Event of Default shall have occurred and
               be continuing or would occur as a consequence thereof;

                   (ii)  the Company would, immediately after giving pro forma
               effect thereto as if that Restricted Payment had been made at
               the beginning of the applicable four-quarter period, have

                                      46
<PAGE>


               been permitted to incur at least $1.00 of additional
               Indebtedness pursuant to the Fixed Charge Coverage Ratio test
               set forth in the first paragraph of Section 4.09 hereof; and

                  (iii)  such  Restricted Payment, together with the aggregate
               amount of all other Restricted Payments made by the Company and
               its Restricted Subsidiaries after the date of this Indenture
               (excluding Restricted Payments permitted by clauses (a) (to the
               extent that the declaration of any dividend referred to therein
               reduces amounts available for Restricted Payments pursuant to
               this clause (iii)), (b) through (i), (k ) through (o) and (q)
               of the next succeeding paragraph), is less than the sum,
               without duplication, of (A) 50% of the Consolidated Net Income
               of the Company for the period (taken as one accounting period)
               commencing June 27, 1999 to the end of the Company's most
               recently ended fiscal quarter for which internal financial
               statements are available at the time of that Restricted Payment
               (or, if Consolidated Net Income for that period is a deficit,
               less 100% of the deficit), plus (B) 100% of the Qualified
               Proceeds received by the Company on or after the date of this
               Indenture from contributions to the Company's capital or from
               the issue or sale on or after the date of this Indenture of
               Equity Interests of the Company or of Disqualified Stock or
               convertible debt securities of the Company to the extent that
               they have been converted into those Equity Interests, other
               than Equity Interests, Disqualified Stock or convertible debt
               securities sold to a Subsidiary of the Company and Disqualified
               Stock or convertible debt securities that have been converted
               into Disqualified Stock; plus (C) the amount equal to the net
               reduction in Investments in Persons after the date of this
               Indenture who are not Restricted Subsidiaries (other than
               Permitted Investments) resulting from (x) Qualified Proceeds
               received as a dividend, repayment of a loan or advance or other
               transfer of assets (valued at the fair market value thereof) to
               the Company or any Restricted Subsidiary from those Persons;
               (y) Qualified Proceeds received upon the sale or liquidation of
               those Investments and (z) the redesignation of Unrestricted
               Subsidiaries (excluding any increase in the amount available
               for Restricted Payments pursuant to clause (j) or (n) below
               arising from the redesignation of that Unrestricted Subsidiary)
               whose assets are used or useful in, or which is engaged in, one
               or more Permitted Business as Restricted Subsidiaries (valued,
               proportionate to the Company's equity interest in that
               Subsidiary, at the fair market value of the net assets of that
               Subsidiary at the time of such redesignation).

         The foregoing provisions will not prohibit:

         (a) the payment of any dividend within 60 days after the date of
declaration thereof, if at said date of declaration, payment would have
complied with the provisions of this Indenture;

         (b) the redemption, repurchase, retirement, defeasance or other
acquisition of any subordinated Indebtedness or Equity Interests of the
Company in exchange for, or out of the net cash proceeds of the substantially
concurrent sale (other than to a Subsidiary of the Company) of other Equity
Interests of the Company (other than any Disqualified Stock), provided that
the amount of any such net cash proceeds that are utilized for any such
redemption, repurchase, retirement, defeasance or other acquisition shall be
excluded from clause (iii)(B) of the preceding paragraph;

         (c) the defeasance, redemption, repurchase, retirement or other
acquisition of subordinated Indebtedness of the Company with the net cash
proceeds from an incurrence of, or in exchange for, Permitted Refinancing
Indebtedness;

                                      47
<PAGE>


         (d) the repurchase, redemption or other acquisition or retirement for
value of any Equity Interests of the Company or Parent or CRL Acquisition LLC
held by any member of Parent's, the Company's (or any of its Restricted
Subsidiaries') management pursuant to any management equity subscription
agreement or stock option agreement and any dividend to Parent to fund any
such repurchase, redemption, acquisition or retirement; provided that (i) the
aggregate price paid for all such repurchased, redeemed, acquired or retired
Equity Interests shall not exceed (x) $5.0 million in any calendar year, with
unused amounts in any calendar year being carried over to succeeding calendar
years subject to a maximum (without giving effect to the following clause (y))
of $10.0 million in any calendar year; plus (y) the aggregate net cash
proceeds received by the Company during that calendar year from any reissuance
of Equity Interests by the Company or Parent to members of management of the
Company and its Restricted Subsidiaries; provided that the amount of any such
net cash proceeds that are used to permit an acquisition or retirement for
value pursuant to this clause (d) shall be excluded from clause (iii)(B) of
the preceding paragraph; and (ii) no Default or Event of Default shall have
occurred and be continuing immediately after that transaction;

         (e) payments and transactions in connection with the Transactions,
including any purchase price adjustment or any other payments made pursuant to
or contemplated in the Transaction Agreements or any financial advisory
agreements with Donaldson, Lufkin & Jenrette Securities Corporation, the
Transaction Financing, the Offering, the New Credit Facility (including
commitment, syndication and arrangement fees payable thereunder) and the
application of the proceeds thereof, and the payment of fees and expenses with
respect thereto;

         (f) the payment of dividends or the making of loans or advances by
the Company to Parent not to exceed $2.5 million in any fiscal year for costs
and expenses incurred by Parent in its capacity as a holding company or for
services rendered by Parent on behalf of the Company;

         (g) payments or distributions to Parent pursuant to any Tax Sharing
Agreement;

         (h) the payment of dividends by a Restricted Subsidiary on any class
of common stock of that Restricted Subsidiary if (i) that dividend is paid pro
rata to all holders of that class of common stock; and (ii) at least 50.1% of
that class of common stock is held by the Company or one or more of its
Restricted Subsidiaries;

         (i) the repurchase of any class of common stock of a Restricted
Subsidiary if (i) that repurchase is made pro rata with respect to that class
of common stock; and (ii) at least 50.1% of that class of common stock is held
by the Company or one or more of its Restricted Subsidiaries;

         (j) any other Restricted Investment made in a Permitted Business
which, together with all other Restricted Investments made pursuant to this
clause (j) since the date of this Indenture, does not exceed $5.0 million (in
each case, after giving effect to all subsequent reductions in the amount of
any Restricted Investment made pursuant to this clause (j), either as a result
of (i) the repayment or disposition thereof for cash or (ii) the redesignation
of an Unrestricted Subsidiary as a Restricted Subsidiary (valued,
proportionate to the Company's equity interest in that Subsidiary at the time
of that redesignation) at the fair market value of the net assets of that
Subsidiary at the time of such redesignation), in the case of clause (i) and
(ii), not to exceed the amount of the Restricted Investment previously made
pursuant to this clause (j); provided that no Default or Event of Default
shall have occurred and be continuing immediately after making that Restricted
Investment;

         (k) the declaration and payment of dividends to holders of any class
or series of Disqualified Stock of the Company or any Restricted Subsidiary
issued on or after the date of this Indenture in

                                      48
<PAGE>


accordance with Section 4.09 hereof; provided that no Default or Event of
Default shall have occurred and be continuing immediately after making that
Restricted Payment;

         (l) repurchases of Equity Interests deemed to occur upon exercise of
stock options if those Equity Interests represent a portion of the exercise
price of those options;

         (m) any other Restricted Payment which, together with all other
Restricted Payments made pursuant to this clause (n) since the date of this
Indenture, does not exceed $5.0 million, in each case, after giving effect to
all subsequent reductions in the amount of any Restricted Investment made
pursuant to this clause (n) either as a result of (i) the repayment or
disposition thereof for cash or (ii) the redesignation of an Unrestricted
Subsidiary as a Restricted Subsidiary (valued, proportionate to the Company's
equity interest in that Subsidiary at the time of such redesignation at the
fair market value of the net assets of that Subsidiary at the time of that
redesignation), in the case of clause (i) and (ii), not to exceed the amount
of the Restricted Investment previously made pursuant to this clause (n);
provided that no Default or Event of Default shall have occurred and be
continuing immediately after making that Restricted Payment;

         (n) the pledge by the Company of the Capital Stock of an Unrestricted
Subsidiary of the Company to secure Non-Recourse Debt of that Unrestricted
Subsidiary;

         (o) the purchase, redemption or other acquisition or retirement for
value of any Equity Interests of any Restricted Subsidiary issued after the
date of this Indenture, provided that the aggregate price paid for any such
repurchased, redeemed, acquired or retired Equity Interests shall not exceed
the sum of (i) the amount of cash and Cash Equivalents received by that
Restricted Subsidiary from the issue or sale thereof; and (ii) any accrued
dividends thereon the payment of which would be permitted pursuant to clause
(k) above;

         (p) any Investment in an Unrestricted Subsidiary that is funded by
Qualified Proceeds received by the Company on or after the date of this
Indenture from contributions to the Company's capital or from the issue and
sale on or after the date of this Indenture of Equity Interests of the Company
or of Disqualified Stock or convertible debt securities to the extent they
have been converted into such Equity Interests (other than Equity Interests,
Disqualified Stock or convertible debt securities sold to a Subsidiary of the
Company and other than Disqualified Stock or convertible debt securities that
have been converted into Disqualified Stock) in an amount (measured at the
time such Investment is made and without giving effect to subsequent changes
in value) that does not exceed the amount of such Qualified Proceeds
(excluding any such Qualified Proceeds to the extent utilized to permit a
prior "Restricted Payment" pursuant to clause (iii)(B) of the preceding
paragraph); and

         (q) distributions or payments of Receivables Fees.

         The Board of Directors may designate any Restricted Subsidiary to be
an Unrestricted Subsidiary if that designation would not cause a Default. For
purposes of making that designation, all outstanding Investments by the
Company and its Restricted Subsidiaries (except to the extent repaid in cash)
in the Subsidiary so designated will be deemed to be Restricted Payments at
the time of that designation and will reduce the amount available for
Restricted Payments under the first paragraph of this Section 4.07. All such
outstanding Investments will be deemed to constitute Restricted Investments in
an amount equal to the greater of (i) the net book value of those Investments
at the time of that designation and (ii) the fair market value of those
Investments at the time of that designation. Such designation will only be
permitted if that Restricted Investment would be permitted at that time and if
that Restricted Subsidiary otherwise meets the definition of an Unrestricted
Subsidiary.

                                      49
<PAGE>


         The amount of (i) all Restricted Payments (other than cash) shall be
the fair market value on the date of the Restricted Payment of the asset(s) or
securities proposed to be transferred or issued by the Company or such
Restricted Subsidiary, as the case may be, pursuant to the Restricted Payment
and (ii) Qualified Proceeds (other than cash) shall be the fair market value
on the date of receipt thereof by the Company of such Qualified Proceeds.

         The fair market value of any non-cash Restricted Payment shall be
determined by the Board of Directors whose resolution with respect thereto
shall be delivered to the Trustee.

         Not later than the date of making any Restricted Payment, the Company
shall deliver to the Trustee an Officers' Certificate stating that the
Restricted Payment is permitted and setting forth the basis upon which the
calculations required by this Section 4.07 were computed.

Section 4.08   Dividend and Other Payment Restrictions Affecting Subsidiaries.

         The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, create or otherwise cause or suffer
to exist or become effective any encumbrance or restriction on the ability of
any Restricted Subsidiary to (a)(i) pay dividends or make any other
distributions to the Company or any of its Restricted Subsidiaries (A) on its
Capital Stock or (B) with respect to any other interest or participation in,
or measured by, its profits; or (ii) pay any Indebtedness owed to the Company
or any of its Restricted Subsidiaries; (b) make loans or advances to the
Company or any of its Restricted Subsidiaries; or (c) transfer any of its
properties or assets to the Company or any of its Restricted Subsidiaries.
However, the foregoing restrictions will not apply to encumbrances or
restrictions existing under or by reason of (a) Existing Indebtedness as in
effect on the date of this Indenture; (b) the New Credit Facility as in effect
as of the date of this Indenture, and any amendments, modifications,
restatements, renewals, increases, supplements, refundings, replacements or
refinancings thereof; (c) this Indenture and the Notes; (d) applicable law and
any applicable rule, regulation or order; (e) any agreement or instrument of a
Person acquired by the Company or any of its Restricted Subsidiaries as in
effect at the time of that acquisition (except to the extent created in
contemplation of such acquisition), which encumbrance or restriction is not
applicable to any Person, or the properties or assets of any Person, other
than the Person, or the property or assets of the Person, so acquired,
provided that, in the case of Indebtedness, that Indebtedness was permitted by
the terms of this Indenture to be incurred; (f) customary non-assignment
provisions in leases entered into in the ordinary course of business and
consistent with past practices; (g) purchase money obligations for property
acquired in the ordinary course of business that impose restrictions of the
nature described in clause (e) above on the property so acquired; (h)
contracts for the sale of assets, including, without limitation, customary
restrictions with respect to a Subsidiary pursuant to an agreement that has
been entered into for the sale or disposition of all or substantially all of
the Capital Stock or assets of that Subsidiary; (i) Permitted Refinancing
Indebtedness, provided that the restrictions contained in the agreements
governing that Permitted Refinancing Indebtedness are, in the good faith
judgment of the Company's board of directors, not materially less favorable,
taken as a whole, to the Holders of the Notes than those contained in the
agreements governing the Indebtedness being refinanced; (j) secured
Indebtedness otherwise permitted to be incurred pursuant to Sections 4.09 and
4.12 hereof that limit the right of the debtor to dispose of the assets
securing that Indebtedness; (k) restrictions on cash or other deposits or net
worth imposed by customers under contracts entered into in the ordinary course
of business; (l) other Indebtedness or Disqualified Stock of Restricted
Subsidiaries permitted to be incurred subsequent to the Issuance Date pursuant
to the provisions of Section 4.09 hereof; (m) customary provisions in joint
venture agreements and other similar agreements entered into in the ordinary
course of business; and (n) restrictions created in connection with any
Receivables Facility that, in the good faith determination of the board of
directors of the Company, are necessary or advisable to effect that
Receivables Facility.

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<PAGE>


Section 4.09   Incurrence of Indebtedness and Issuance of Preferred Stock.

         (a) The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, create, incur, issue, assume,
guarantee or otherwise become directly or indirectly liable, contingently or
otherwise, with respect to (collectively, "incur") any Indebtedness (including
Acquired Indebtedness); the Company will not, and will not permit any of its
Restricted Subsidiaries to, issue any shares of Disqualified Stock; and the
Company will not permit any of its Restricted Subsidiaries to issue any shares
of preferred stock; provided that the Company or any Restricted Subsidiary may
incur Indebtedness, including Acquired Indebtedness, or issue shares of
Disqualified Stock if the Fixed Charge Coverage Ratio for the Company's most
recently ended four full fiscal quarters for which internal financial
statements are available immediately preceding the date on which that
additional Indebtedness is incurred or that Disqualified Stock is issued would
have been at least 2.0 to 1 if such four-quarter period ended prior to
September 30, 2002 and 2.25 to 1 thereafter, determined on a consolidated pro
forma basis, including a pro forma application of the net proceeds therefrom,
as if the additional Indebtedness had been incurred, or the Disqualified Stock
had been issued, as the case may be, at the beginning of that four-quarter
period.

         The provisions of the first paragraph of this Section 4.09 will not
apply to the incurrence of any of the following items of Indebtedness
(collectively, "Permitted Indebtedness"):

               (i) the incurrence by the Company and its Restricted
         Subsidiaries of Indebtedness under the New Credit Facility and the
         Foreign Credit Facilities; provided that the aggregate principal
         amount of all Indebtedness (with letters of credit being deemed to
         have a principal amount equal to the maximum potential liability of
         the Company and those Restricted Subsidiaries thereunder) then
         classified as having been incurred in reliance upon this clause (i)
         that remains outstanding under the New Credit Facility and the
         Foreign Credit Facilities after giving effect to that incurrence does
         not exceed an amount equal to $215.0 million;

              (ii) the incurrence by the Company and its Restricted
         Subsidiaries of Existing Indebtedness;

             (iii) the incurrence by the Company of Indebtedness represented
         by the Notes and this Indenture and the Note Guarantees;

              (iv) the incurrence by the Company or any of its Restricted
         Subsidiaries of Indebtedness represented by Capital Expenditure
         Indebtedness, Capital Lease Obligations or other obligations, in each
         case, the proceeeds of which are used solely for the purpose of
         financing all or any part of the purchase price or cost of
         construction or improvement of property, plant or equipment
         (including acquisitions of Capital Stock of a Person that becomes a
         Restricted Subsidiary to the extent of the fair market value of the
         property, plant or equipment so acquired) used in the business of the
         Company or that Restricted Subsidiary, in an aggregate principal
         amount (or accreted value, as applicable) not to exceed $20.0 million
         outstanding after giving effect to that incurrence;

               (v) Indebtedness arising from agreements of the Company or any
         Restricted Subsidiary providing for indemnification, adjustment of
         purchase price or similar obligations, in each case, incurred or
         assumed in connection with the disposition of any business, assets or
         a Subsidiary, other than guarantees of Indebtedness incurred by any
         Person acquiring all or any portion of such business, assets or
         Restricted Subsidiary for the purpose of financing that acquisition;
         provided that (A) that Indebtedness is not reflected on the balance
         sheet of the Company or any Restricted Subsidiary (contingent
         obligations referred to in a footnote or footnotes to financial


                                      51
<PAGE>


         statements and not otherwise reflected on the balance sheet will not
         be deemed to be reflected on that balance sheet for purposes of this
         clause (A)) and (B) the maximum assumable liability in respect of
         that Indebtedness shall at no time exceed the gross proceeds
         including non-cash proceeds (the fair market value of those non-cash
         proceeds being measured at the time received and without giving
         effect to any subsequent changes in value) actually received by the
         Company and/or that Restricted Subsidiary in connection with that
         disposition;

              (vi) the incurrence by the Company or any of its Restricted
         Subsidiaries of Permitted Refinancing Indebtedness in exchange for,
         or the net proceeds of which are used to refund, refinance or replace
         Indebtedness (other than intercompany Indebtedness) that was
         permitted by this Indenture to be incurred;

             (vii) the incurrence by the Company or any of its Restricted
         Subsidiaries of intercompany Indebtedness between or among the
         Company and/or any of its Restricted Subsidiaries; provided that (i)
         if the Company is the obligor on that Indebtedness, that Indebtedness
         is expressly subordinated to the prior payment in full in cash of all
         Obligations with respect to the Notes; and (ii)(A) any subsequent
         issuance or transfer of Equity Interests that results in any such
         Indebtedness being held by a Person other than the Company or a
         Restricted Subsidiary thereof and (B) any sale or other transfer of
         any such Indebtedness to a Person that is not either the Company or a
         Restricted Subsidiary thereof shall be deemed, in each case, to
         constitute an incurrence of such Indebtedness by the Company or such
         Restricted Subsidiary, as the case may be, that was not permitted by
         this clause (vii);

            (viii) the incurrence by the Company or any of its Restricted
         Subsidiaries of Hedging Obligations that are incurred for the purpose
         of fixing or hedging; (A) interest rate risk with respect to any
         floating rate Indebtedness that is permitted by the terms of this
         Indenture to be outstanding; and (B) exchange rate risk with respect
         to agreements or Indebtedness of such Person payable denominated in a
         currency other than United States dollars, provided that those
         agreements do not increase the Indebtedness of the obligor
         outstanding at any time other than as a result of fluctuations in
         foreign currency exchange rates or interest rates or by reason of
         fees, indemnities and compensation payable thereunder;

               (ix) the guarantee by the Company or any of its Restricted
         Subsidiaries of Indebtedness of the Company or a Restricted
         Subsidiary of the Company that was permitted to be incurred by
         another provision of this Section 4.09;

               (x) obligations in respect of performance and surety bonds and
         completion guarantees (including related letters of credit) provided
         by the Company or any Restricted Subsidiary in the ordinary course of
         business; and

               (xi) the incurrence by the Company or any of its Restricted
         Subsidiaries of additional Indebtedness in an aggregate principal
         amount (or accreted value, as applicable) outstanding after giving
         effect to that incurrence, including all Permitted Refinancing
         Indebtedness incurred to refund, refinance or replace any
         Indebtedness incurred pursuant to this clause (xi), not to exceed
         $30.0 million.

         For purposes of determining compliance with this Section 4.09, in the
event that an item of Indebtedness meets the criteria of more than one of the
categories of Permitted Indebtedness described in clauses (i) through (xi)
above or is entitled to be incurred pursuant to the first paragraph of this
Section 4.09, the Company shall, in its sole discretion, classify such item of
Indebtedness in any manner that complies

                                      52
<PAGE>


with this Section 4.09 and such item of Indebtedness will be treated as having
been incurred pursuant to only one of those clauses or pursuant to the first
paragraph hereof of this Section 4.09. In addition, the Company may, at any
time, change the classification of an item of Indebtedness (or any portion
thereof) to any other clause or to the first paragraph hereof; provided that
the Company would be permitted to incur such item of Indebtedness (or such
portion thereof) pursuant to such other clause or the first paragraph hereof
of this Section 4.09, as the case may be, at the time of reclassification.
Accrual of interest, accretion or amortization of original issue discount will
not be deemed to be an incurrence of Indebtedness for purposes of this Section
4.09.

         All Indebtedness under the New Credit Facility and the Foreign Credit
Facilities outstanding on the date on which Notes are first issued and
authenticated under this Indenture shall be deemed to have been incurred on
such date in reliance on the first paragraph of this Section 4.09.

Section 4.10   Asset Sales.

         The Company will not, and will not permit any of its Restricted
Subsidiaries to, consummate an Asset Sale unless (a) the Company or the
Restricted Subsidiary, as the case may be, receives consideration at the time
of that Asset Sale at least equal to the fair market value (evidenced by a
resolution of the Board of Directors set forth in an Officers' Certificate
delivered to the Trustee) of the assets or Equity Interests issued or sold or
otherwise disposed of; and (b) at least 75% of the consideration therefor
received by the Company or such Restricted Subsidiary is in the form of (i)
cash or Cash Equivalents; or (ii) property or assets that are used or useful
in a Permitted Business, or the Capital Stock of any Person engaged in a
Permitted Business if, as a result of the acquisition by the Company or any
Restricted Subsidiary thereof, such Person becomes a Restricted Subsidiary;
provided that the amount of (x) any liabilities, as shown on the Company's or
such Restricted Subsidiary's most recent balance sheet, of the Company or any
Restricted Subsidiary (other than contingent liabilities and liabilities that
are by their terms subordinated to the Notes or any guarantee thereof) that
are assumed by the transferee of any such assets pursuant to a customary
novation agreement that releases the Company or the Restricted Subsidiary from
further liability; (y) any securities, notes or other obligations received by
the Company or the Restricted Subsidiary from the transferee that are
converted within 180 days of their receipt by the Company or the Restricted
Subsidiary into cash or Cash Equivalents but only to the extent of the cash or
Cash Equivalents received; and (z) any Designated Noncash Consideration
received by the Company or any of its Restricted Subsidiaries in that Asset
Sale having an aggregate fair market value, taken together with all other
Designated Noncash Consideration received pursuant to this clause (z) that is
at that time outstanding, not to exceed 15% of Total Assets at the time of the
receipt of that Designated Noncash Consideration, with the fair market value
of each item of Designated Noncash Consideration being measured at the time
received and without giving effect to subsequent changes in value, shall be
deemed to be cash for purposes of this Section 4.10; and provided further that
the 75% limitation referred to in clause (b) above will not apply to any Asset
Sale in which the cash or Cash Equivalents portion of the consideration
received therefrom, determined in accordance with the foregoing proviso, is
equal to or greater than what the after-tax proceeds would have been had such
Asset Sale complied with the aforementioned 75% limitation.

         Within 365 days after the receipt of any Net Proceeds from an Asset
Sale, the Company or the Restricted Subsidiary, as the case may be, shall
apply such Net Proceeds, at its option (or to the extent the Company is
required to apply such Net Proceeds pursuant to the terms of the New Credit
Facility), to (a) repay or purchase Senior Indebtedness or Pari Passu
Indebtedness of the Company or any Indebtedness of any Restricted Subsidiary,
as the case may be, provided that if the Company shall so repay or purchase
Pari Passu Indebtedness of the Company, (i) it will equally and ratably reduce
Indebtedness under the Notes if the Notes are then redeemable; or, (ii) if the
Notes may not then be redeemed, the Company shall make an

                                      53
<PAGE>


offer, in accordance with the procedures set forth below for an Asset Sale
Offer, to all Holders of Notes to purchase at a purchase price equal to 100%
of the principal amount of the Notes, plus accrued and unpaid interest and
Liquidated Damages, if any, thereon to the date of purchase, the Notes that
would otherwise be redeemed; or (b)(i) an investment in property, the making
of a capital expenditure or the acquisition of assets that are used or useful
in a Permitted Business; or (ii) the acquisition of Capital Stock of any
Person primarily engaged in a Permitted Business if (x) as a result of the
acquisition by the Company or any Restricted Subsidiary thereof, that Person
becomes a Restricted Subsidiary; or (y) the Investment in that Capital Stock
is permitted by clause (6) of the definition of Permitted Investments. Pending
the final application of any Net Proceeds, the Company may temporarily reduce
Indebtedness or otherwise invest those Net Proceeds in any manner that is not
prohibited by this Indenture. Any Net Proceeds from Asset Sales that are not
applied or invested as provided in the first sentence of this paragraph will
be deemed to constitute "Excess Proceeds." When the aggregate amount of Excess
Proceeds exceeds $10.0 million, the Company will be required to make an offer
to all Holders of Notes (an "Asset Sale Offer") to purchase the maximum
principal amount of Notes that may be purchased out of the Excess Proceeds, at
an offer price in cash in an amount equal to 100% of the principal amount
thereof, plus accrued and unpaid interest and Liquidated Damages, if any,
thereon to the date of purchase, in accordance with the procedures set forth
in this Indenture. To the extent that any Excess Proceeds remain after
consummation of an Asset Sale Offer, the Company may use such Excess Proceeds
for any purpose not otherwise prohibited by this Indenture. If the aggregate
principal amount of Notes surrendered by Holders thereof in connection with an
Asset Sale Offer exceeds the amount of Excess Proceeds, the Trustee shall
select the Notes to be purchased as set forth under Sections 3.02 and 3.03
hereof. Upon completion of such offer to purchase, the amount of Excess
Proceeds shall be reset at zero.

         The Company will comply with the requirements of Rule 14e-1 under the
Exchange Act and any other securities laws and regulations thereunder to the
extent those laws and regulations are applicable in connection with the
repurchase of the Notes pursuant to an Asset Sale Offer. To the extent that
the provisions of any securities laws or regulations conflict with the
provisions of this Indenture relating to such Asset Sale Offer, the Company
will comply with the applicable securities laws and regulations and shall not
be deemed to have breached its obligations described in this Indenture by
virtue thereof.

Section 4.11   Transactions with Affiliates.

         The Company will not, and will not permit any of its Restricted
Subsidiaries to, make any payment to, or sell, lease, transfer or otherwise
dispose of any of its properties or assets to, or purchase any property or
assets from, or enter into or make or amend any transaction, contract,
agreement, understanding, loan, advance or guarantee with, or for the benefit
of, any Affiliate of the Company (each of the foregoing, an "Affiliate
Transaction"), unless (a) such Affiliate Transaction is on terms that are no
less favorable to the Company or such Restricted Subsidiary than those that
would have been obtained in a comparable transaction by the Company or that
Restricted Subsidiary with an unrelated Person; and (b) the Company delivers
to the Trustee, with respect to any Affiliate Transaction or series of related
Affiliate Transactions involving aggregate consideration in excess of $7.5
million, either (i) a resolution of the Board of Directors set forth in an
Officers' Certificate certifying that the relevant Affiliate Transaction
complies with clause (a) above and that such Affiliate Transaction has been
approved by a majority of the disinterested members of the Board of Directors;
or (ii) an opinion as to the fairness to the Holders of that Affiliate
Transaction from a financial point of view issued by an accounting, appraisal
or investment banking firm of national standing.

         Notwithstanding the foregoing, the following items shall not be
deemed to be Affiliate Transactions: (a) customary directors' fees,
indemnification or similar arrangements or any employment agreement or other
compensation plan or arrangement entered into by the Company or any of its
Restricted

                                      54
<PAGE>

Subsidiaries in the ordinary course of business (including ordinary course
loans to employees not to exceed (i) $5.0 million outstanding in the aggregate
at any time and (ii) $2.0 million to any one employee) and consistent with the
past practice of the Company or that Restricted Subsidiary; (b) transactions
between or among the Company and/or its Restricted Subsidiaries; (c) payments
of customary fees by the Company or any of its Restricted Subsidiaries to DLJ
Merchant Banking Funds and their Affiliates made for any financial advisory,
financing, underwriting or placement services or in respect of other
investment banking activities, including, without limitation, in connection
with acquisitions or divestitures which are approved by a majority of the
Board of Directors in good faith; (d) any agreement as in effect on the date
of this Indenture or any amendment thereto (so long as that amendment is not
disadvantageous to the Holders of the Notes in any material respect) or any
transaction contemplated thereby; (e) payments and transactions in connection
with the Transactions, including any purchase price adjustment or any other
payments made pursuant to the Transaction Agreements or any financial advisory
agreements with Donaldson, Lufkin & Jenrette Securities Corporation and the
Transaction Financing, the New Credit Facility (including commitment,
syndication and arrangement fees payable thereunder) and the Offering
(including underwriting discounts and commissions in connection therewith) and
the application of the proceeds thereof, and the payment of the fees and
expenses with respect thereto; (f) Restricted Payments that are permitted by
Section 4.07 hereof and any Permitted Investments; and (g) sales of accounts
receivable, or participations therein, in connection with any Receivables
Facility.

Section 4.12   Liens.

         The Company will not, and will not permit any of its Restricted
Subsidiaries to, directly or indirectly, create, incur, assume or suffer to
exist any Lien, other than a Permitted Lien, that secures obligations under
any Pari Passu Indebtedness or subordinated Indebtedness of the Company on any
asset or property now owned or hereafter acquired by the Company or any of its
Restricted Subsidiaries, or any income or profits therefrom or assign or
convey any right to receive income therefrom, unless the Notes are equally and
ratably secured with the obligations so secured until such time as those
obligations are no longer secured by a Lien; provided that, in any case
involving a Lien securing subordinated Indebtedness of the Company, that Lien
is subordinated to the Lien securing the Notes to the same extent that that
subordinated Indebtedness is subordinated to the Notes.

Section 4.13   Corporate Existence.

         Subject to Article 5 hereof, the Company shall do or cause to be done
all things necessary to preserve and keep in full force and effect (i) the
corporate, partnership or other existence of itself and each of its
Subsidiaries, in accordance with the respective organizational documents (as
the same may be amended from time to time) of the Company or any such
Subsidiary and (ii) the rights (charter and statutory), licenses and
franchises of the Company and its Subsidiaries; provided, however, that the
Company shall not be required to preserve any such right, license or
franchise, or the corporate, partnership or other existence of itself and any
of its Subsidiaries, if the Board of Directors shall determine that the
preservation thereof is no longer desirable in the conduct of the business of
the Company and its Subsidiaries, taken as a whole, and that the loss thereof
is not adverse in any material respect to the Holders of the Notes.

Section 4.14   Offer to Repurchase Upon Change of Control.

(a) Upon the occurrence of a Change of Control, each Holder of Notes will have
the right to require the Company to repurchase all or any part (equal to
$1,000 or an integral multiple thereof) of such Holder's Notes pursuant to the
offer described below (the "Change of Control Offer") at an offer price in


                                      55
<PAGE>


cash equal to 101% of the aggregate principal amount thereof, plus accrued and
unpaid interest and Liquidated Damages, if any, thereon to the date of
repurchase (the "Change of Control Payment"). Within 60 days following any
Change of Control, the Company will, or will cause the Trustee to, mail a
notice to each Holder describing the transaction or transactions that
constitute the Change of Control and offering to repurchase Notes on the date
specified in that notice, which date shall be no earlier than 30 days and no
later than 60 days from the date that notice is mailed (the "Change of Control
Payment Date"), pursuant to the procedures required by this Indenture and
described in that notice. The Company will comply with the requirements of
Rule 14e-1 under the Exchange Act and any other securities laws and
regulations thereunder to the extent such laws and regulations are applicable
in connection with the repurchase of the Notes as a result of a Change of
Control. To the extent that the provisions of any securities laws or
regulations conflict with the provisions of this Indenture relating to a
Change of Control Offer, the Company will comply with the applicable
securities laws and regulations and shall not be deemed to have breached its
obligations described in this Indenture by virtue thereof.

         (b) On the Change of Control Payment Date, the Company will, to the
extent lawful, (a) accept for payment all Notes or portions thereof properly
tendered pursuant to the Change of Control Offer; (b) deposit with the Paying
Agent an amount equal to the Change of Control Payment in respect of all Notes
or portions thereof so tendered; and (c) deliver or cause to be delivered to
the Trustee the Notes so accepted together with an Officers' Certificate
stating the aggregate principal amount of Notes or portions thereof being
purchased by the Company. The Paying Agent will promptly mail to each Holder
of Notes so tendered the Change of Control Payment for that Holder's Notes,
and the Trustee will promptly authenticate and mail, or cause to be
transferred by book-entry, to each Holder a new Note equal in principal amount
to any unpurchased portion of the Notes surrendered, if any; provided that
each new Note will be in a principal amount of $1,000 or an integral multiple
thereof. Prior to complying with the provisions of this Section 4.14, but in
any event within 90 days following a Change of Control, the Company will
either repay all outstanding Senior Indebtedness or obtain the requisite
consents, if any, under all agreements governing outstanding Senior
Indebtedness to permit the repurchase of Notes required by this Section 4.14.
The Company shall publicly announce the results of the Change of Control Offer
on or as soon as practicable after the Change of Control Payment Date.

         (c) Notwithstanding anything to the contrary in this Section 4.14,
the Company will not be required to make a Change of Control Offer upon a
Change of Control if a third party makes the Change of Control Offer in the
manner, at the times and otherwise in compliance with the requirements set
forth in this Indenture applicable to a Change of Control Offer made by the
Company and purchases all Notes validly tendered and not withdrawn under such
Change of Control Offer.

Section 4.15   No Senior Subordinated Indebtedness.

         Notwithstanding the provisions of Section 4.09 hereof, (i) the
Company shall not incur any Indebtedness that is subordinate or junior in
right of payment to any Senior Indebtedness and senior in right of payment to
the Notes, and (ii) no Guarantor will incur any Indebtedness that is
subordinate or junior in right of payment to any Senior Indebtedness and
senior in right of payment to that Guarantor's Note Guarantee.

Section 4.16   Limitation on Sale and Leaseback Transactions.

         The Company will not, and will not permit any of its Restricted
Subsidiaries to, enter into any sale and leaseback transaction; provided that
the Company or any Restricted Subsidiary may enter into a sale and leaseback
transaction if (a) the Company or such Restricted Subsidiary, as the case may
be, could have (i)

                                      56
<PAGE>


incurred Indebtedness in an amount equal to the Attributable Indebtedness
relating to such sale and leaseback transaction pursuant to the Fixed Charge
Coverage Ratio test set forth in the first paragraph of Section 4.09 hereof;
and (ii) incurred a Lien to secure that Indebtedness pursuant to Section 4.12
hereof; (b) the gross cash proceeds of such sale and leaseback transaction are
at least equal to the fair market value (as determined in good faith by the
Board of Directors and set forth in an Officers' Certificate delivered to the
Trustee) of the property that is the subject of that sale and leaseback
transaction; and (c) the transfer of assets in that sale and leaseback
transaction is permitted by, and the Company applies the proceeds of such
transaction in compliance with, Section 4.10 hereof.

Section 4.17   Additional Note Guarantees.

         If the Company or any of its Subsidiaries shall acquire or create a
Wholly-Owned Restricted Subsidiary after the date of this Indenture, then such
newly acquired or created a Wholly-Owned Restricted Subsidiary shall execute a
Note Guarantee in the form of a Supplemental Indenture and deliver an Opinion
of Counsel, in accordance with the terms of this Indenture, except for (i) all
Subsidiaries organized outside of the United States and its territories, (ii)
all Subsidiaries that have properly been designated as Unrestricted
Subsidiaries in accordance with this Indenture for so long as they continue to
constitute Unrestricted Subsidiaries and (iii) all Subsidiaries that have not
guaranteed any Indebtedness under the New Credit Facility.


                                  ARTICLE 5
                                  SUCCESSORS

Section 5.01   Merger, Consolidation, or Sale of Assets.

         The Company may not consolidate or merge with or into (whether or not
the Company is the surviving corporation), or sell, assign, transfer, convey
or otherwise dispose of all or substantially all of its properties or assets
in one or more related transactions to, another Person unless (a) the Company
is the surviving corporation or the Person formed by or surviving any such
consolidation or merger (if other than the Company) or to which that sale,
assignment, transfer, conveyance or other disposition shall have been made is
a corporation organized or existing under the laws of the United States, any
state thereof or the District of Columbia; (b) the Person formed by or
surviving any such consolidation or merger (if other than the Company) or the
Person to which that sale, assignment, transfer, conveyance or other
disposition shall have been made assumes all the obligations of the Company
under the Registration Rights Agreement, the Notes and this Indenture pursuant
to a supplemental indenture in a form reasonably satisfactory to the Trustee;
(c) immediately after that transaction no Default or Event of Default exists;
and (d) the Company or the Person formed by or surviving any such
consolidation or merger (if other than the Company), or to which that sale,
assignment, transfer, conveyance or other disposition shall have been made (i)
will, at the time of such transaction and after giving pro forma effect
thereto as if that transaction had occurred at the beginning of the applicable
four-quarter period, be permitted to incur at least $1.00 of additional
Indebtedness pursuant to the Fixed Charge Coverage Ratio test set forth in the
first paragraph of Section 4.09 hereof or (ii) would, together with its
Restricted Subsidiaries, have a higher Fixed Charge Coverage Ratio immediately
after that transaction (after giving pro forma effect thereto as if that
transaction had occurred at the beginning of the applicable four-quarter
period) than the Fixed Charge Coverage Ratio of the Company and its Restricted
Subsidiaries immediately prior to that transaction. The foregoing clause (d)
will not prohibit (i) a merger between the Company and a Wholly Owned
Subsidiary of Parent created for the purpose of holding the Capital Stock of
the Company; (ii) a merger between the Company and a Wholly Owned Restricted
Subsidiary; or (iii) a merger between the Company and an Affiliate
incorporated solely for the purpose of reincorporating the Company in another
State of the United States so long as, in each

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<PAGE>


case, the amount of Indebtedness of the Company and its Restricted
Subsidiaries is not increased thereby. The Company will not lease all or
substantially all of its assets to any Person.

Section 5.02   Successor Corporation Substituted.

         Upon any consolidation or merger, or any sale, assignment, transfer,
lease, conveyance or other disposition of all or substantially all of the
assets of the Company in accordance with Section 5.01 hereof, the successor
corporation formed by such consolidation or into or with which the Company is
merged or to which such sale, assignment, transfer, lease, conveyance or other
disposition is made shall succeed to, and be substituted for (so that from and
after the date of such consolidation, merger, sale, lease, conveyance or other
disposition, the provisions of this Indenture referring to the "Company" shall
refer instead to the successor corporation and not to the Company), and may
exercise every right and power of the Company under this Indenture with the
same effect as if such successor Person had been named as the Company herein;
provided, however, that the predecessor Company shall not be relieved from the
obligation to pay the principal of and interest or Liquidated Damages, if any,
on the Notes except in the case of a sale of all or substantially all of the
Company's assets that meets the requirements of Section 5.01 hereof.


                                  ARTICLE 6
                             DEFAULTS AND REMEDIES

Section 6.01   Events of Default.

         Each of the following constitutes an Event of Default:

         (a) default for 30 days in the payment when due of interest on, or
Liquidated Damages with respect to, the Notes (whether or not prohibited by
Article 10 hereof);

         (b) default in payment when due of the principal of or premium, if
any, on the Notes (whether or not prohibited by Article 10 hereof);

         (c) failure by the Company or any of its Restricted Subsidiaries for
30 days after receipt of notice from the Trustee or Holders of at least 25% in
principal amount of the Notes then outstanding to comply with Sections 4.07,
4.09, 4.10, 4.14 or Article 5 hereof;

         (d) failure by the Company for 60 days after notice from the Trustee
or the Holders of at least 25% in principal amount of the Notes then
outstanding to comply with any of its other agreements in this Indenture or
the Notes;

         (e) default under any mortgage, indenture or instrument under which
there may be issued or by which there may be secured or evidenced any
Indebtedness for money borrowed by the Company or any of its Restricted
Subsidiaries (or the payment of which is guaranteed by the Company or any of
its Restricted Subsidiaries), whether that Indebtedness or guarantee now
exists, or is created after the date of this Indenture, which default (i) is
caused by a failure to pay Indebtedness at its stated final maturity (after
giving effect to any applicable grace period provided in such Indebtedness) (a
"Payment Default") or (ii) results in the acceleration of that Indebtedness
prior to its stated final maturity and, in each case, the principal amount of
any such Indebtedness, together with the principal amount of any other such
Indebtedness under which there has been a Payment Default or the maturity of
which has been so accelerated, aggregates $10.0 million or more;

                                      58
<PAGE>


         (f) failure by the Company or any of its Restricted Subsidiaries to
pay final judgments aggregating in excess of $10.0 million (net of any amounts
with respect to which a reputable and creditworthy insurance company has
acknowledged liability in writing), which judgments are not paid, discharged
or stayed for a period of 60 days;

         (g) except as permitted by this Indenture, if any Note Guarantee
shall be held in any judicial proceeding to be unenforceable or invalid or
shall cease for any reason to be in full force and effect or any Guarantor, or
any Person acting on behalf of any Guarantor, shall deny or disaffirm its
obligations under its Note Guarantee;

         (h) the Company or any of its Restricted Subsidiaries that is a
Significant Subsidiary or any group of Restricted Subsidiaries that, taken as
a whole, would constitute a Significant Subsidiary pursuant to or within the
meaning of Bankruptcy Law:

               (i) commences a voluntary case,

              (ii) consents to the entry of an order for relief against it in
         an involuntary case,

             (iii) consents to the appointment of a Custodian of it or for
         all or substantially all of its property,

              (iv) makes a general assignment for the benefit of its
         creditors, or

               (v) generally is not paying its debts as they become due; or

         (i) a court of competent jurisdiction enters an order or decree under
any Bankruptcy Law that:

               (i) is for relief against the Company or any of its Restricted
         Subsidiaries that is a Significant Subsidiary or any group of
         Restricted Subsidiaries that, taken as a whole, would constitute a
         Significant Subsidiary in an involuntary case;

               (ii) appoints a Custodian of the Company or any of its
         Restricted Subsidiaries that is a Significant Subsidiary or any group
         of Restricted Subsidiaries that, taken as a whole, would constitute a
         Significant Subsidiary or for all or substantially all of the
         property of the Company or any of its Restricted Subsidiaries that is
         a Significant Subsidiary or any group of Restricted Subsidiaries
         that, taken as a whole, would constitute a Significant Subsidiary; or

               (iii) orders the liquidation of the Company or any of its
         Restricted Subsidiaries that is a Significant Subsidiary or any group
         of Restricted Subsidiaries that, taken as a whole, would constitute a
         Significant Subsidiary;

         and the order or decree remains unstayed and in effect for 60
         consecutive days.

Section 6.02   Acceleration.

         If any Event of Default (other than an Event of Default specified in
clause (h) or (i) of Section 6.01 hereof with respect to the Company, any
Restricted Subsidiaries that is a Significant Subsidiary or any group of
Restricted Subsidiaries that, taken as a whole, would constitute a Significant
Subsidiary) occurs and is continuing, the Holders of at least 25% in principal
amount of the then outstanding Notes

                                      59
<PAGE>


may direct the Trustee to declare all the Notes to be due and payable
immediately. However, so long as any Indebtedness permitted to be incurred
pursuant to the New Credit Facility shall be outstanding, such acceleration
shall not be effective until the earlier of (i) an acceleration under any such
Indebtedness under the New Credit Facility; or (ii) five Business Days after
receipt by the Company and the administrative agent under the New Credit
Facility of written notice of such acceleration. Except as stated in the prior
sentence, upon any such declaration, the Notes shall become due and payable
immediately. Notwithstanding the foregoing, if an Event of Default specified
in clause (h) or (i) of Section 6.01 hereof occurs with respect to the
Company, any of its Restricted Subsidiaries that is a Significant Subsidiary
or any group of Restricted Subsidiaries that, taken as a whole, would
constitute a Significant Subsidiary, all outstanding Notes will become due and
payable without further action or notice. Holders of the Notes may not enforce
this Indenture or the Notes except as provided in this Indenture. The Holders
of a majority in aggregate principal amount of the then outstanding Notes by
written notice to the Trustee may on behalf of all of the Holders rescind an
acceleration and its consequences if the rescission would not conflict with
any judgment or decree and if all existing Events of Default (except
nonpayment of principal, interest or premium or Liquidated Damages, if any,
that has become due solely because of the acceleration) have been cured or
waived, provided that, in the event of a declaration of acceleration of the
Notes because an Event of Default has occurred and is continuing as a result
of the acceleration of any Indebtedness described in clause (e) of Section
6.01 hereof, the declaration of acceleration of the Notes shall be
automatically annulled if the holders of any Indebtedness described in clause
(e) of Section 6.01 hereof have rescinded the declaration of acceleration in
respect of such Indebtedness within 30 days of the date of such declaration
and if (i) the annulment of the acceleration of the Notes would not conflict
with any judgment or decree of a court of competent jurisdiction; and (ii) all
existing Events of Default, except non-payment of principal or interest on the
Notes that became due solely because of the acceleration of the Notes, have
been cured or waived.

Section 6.03   Other Remedies.

         If an Event of Default occurs and is continuing, the Trustee may
pursue any available remedy to collect the payment of principal, premium, if
any, and interest and Liquidated Damages, if any, on the Notes or to enforce
the performance of any provision of the Notes or this Indenture.

         The Trustee may maintain a proceeding even if it does not possess any
of the Notes or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Holder of a Note in exercising any right or
remedy accruing upon an Event of Default shall not impair the right or remedy
or constitute a waiver of or acquiescence in the Event of Default. All
remedies are cumulative to the extent permitted by law.

Section 6.04   Waiver of Past Defaults.

         Holders of not less than a majority in aggregate principal amount of
the then outstanding Notes by notice to the Trustee may on behalf of the
Holders of all of the Notes waive an existing Default or Event of Default and
its consequences hereunder, except a continuing Default or Event of Default in
the payment of the principal of, premium and Liquidated Damages, if any, or
interest on, the Notes (including in connection with an offer to purchase)
(provided, however, that the Holders of a majority in aggregate principal
amount of the then outstanding Notes may rescind an acceleration and its
consequences, including any related payment default that resulted from such
acceleration). Upon any such waiver, such Default shall cease to exist, and
any Event of Default arising therefrom shall be deemed to have been cured for
every purpose of this Indenture; but no such waiver shall extend to any
subsequent or other Default or impair any right consequent thereon.


                                      60
<PAGE>


Section 6.05   Control by Majority.

         Holders of a majority in principal amount of the then outstanding
Notes may direct the time, method and place of conducting any proceeding for
exercising any remedy available to the Trustee or exercising any trust or
power conferred on it. However, the Trustee may refuse to follow any direction
that conflicts with law or this Indenture that the Trustee determines may be
unduly prejudicial to the rights of other Holders of Notes or that may involve
the Trustee in personal liability.

Section 6.06   Limitation on Suits.

         A Holder of a Note may pursue a remedy with respect to this Indenture
or the Notes only if:

         (a) the Holder of a Note gives to the Trustee written notice of a
continuing Event of Default;

         (b) the Holders of at least 25% in principal amount of the then
outstanding Notes make a written request to the Trustee to pursue the remedy;

         (c) such Holder of a Note or Holders of Notes offer and, if
requested, provide to the Trustee indemnity satisfactory to the Trustee
against any loss, liability or expense;

         (d) the Trustee does not comply with the request within 60 days after
receipt of the request and the offer and, if requested, the provision of
indemnity; and

         (e) during such 60-day period the Holders of a majority in principal
amount of the then outstanding Notes do not give the Trustee a direction
inconsistent with the request.

         A Holder of a Note may not use this Indenture to prejudice the rights
of another Holder of a Note or to obtain a preference or priority over another
Holder of a Note.

Section 6.07   Rights of Holders of Notes to Receive Payment.

         Notwithstanding any other provision of this Indenture, the right of
any Holder of a Note to receive payment of principal, premium and Liquidated
Damages, if any, and interest on the Note, on or after the respective due
dates expressed in the Note (including in connection with an offer to
purchase), or to bring suit for the enforcement of any such payment on or
after such respective dates, shall not be impaired or affected without the
consent of such Holder.

Section 6.08   Collection Suit by Trustee.

         If an Event of Default specified in Section 6.01(a) or (b) occurs and
is continuing, the Trustee is authorized to recover judgment in its own name
and as trustee of an express trust against the Company for the whole amount of
principal of, premium and Liquidated Damages, if any, and interest remaining
unpaid on the Notes and interest and Liquidated Damages, if any, on overdue
principal and, to the extent lawful, interest and such further amount as shall
be sufficient to cover the costs and expenses of collection, including the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel.

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<PAGE>


Section 6.09   Trustee May File Proofs of Claim.

         The Trustee is authorized to file such proofs of claim and other
papers or documents as may be necessary or advisable in order to have the
claims of the Trustee (including any claim for the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel)
and the Holders of the Notes allowed in any judicial proceedings relative to
the Company (or any other obligor upon the Notes), its creditors or its
property and shall be entitled and empowered to collect, receive and
distribute any money or other property payable or deliverable on any such
claims and any custodian in any such judicial proceeding is hereby authorized
by each Holder to make such payments to the Trustee, and in the event that the
Trustee shall consent to the making of such payments directly to the Holders,
to pay to the Trustee any amount due to it for the reasonable compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel,
and any other amounts due the Trustee under Section 7.07 hereof. To the extent
that the payment of any such compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, and any other amounts due the
Trustee under Section 7.07 hereof out of the estate in any such proceeding,
shall be denied for any reason, payment of the same shall be secured by a Lien
on, and shall be paid out of, any and all distributions, dividends, money,
securities and other properties that the Holders may be entitled to receive in
such proceeding whether in liquidation or under any plan of reorganization or
arrangement or otherwise. Nothing herein contained shall be deemed to
authorize the Trustee to authorize or consent to or accept or adopt on behalf
of any Holder any plan of reorganization, arrangement, adjustment or
composition affecting the Notes or the rights of any Holder, or to authorize
the Trustee to vote in respect of the claim of any Holder in any such
proceeding.

Section 6.10   Priorities.

         If the Trustee collects any money pursuant to this Article 6, it
shall pay out the money in the following order:

         First: to the Trustee, its agents and attorneys for amounts due under
Section 7.07 hereof, including payment of all compensation, expense and
liabilities incurred, and all advances made, by the Trustee and the costs and
expenses of collection;

         Second: to holders of Senior Indebtedness to the extent required by
Article 10 or Section 11.02 hereof;

         Third: to Holders of Notes for amounts due and unpaid on the Notes
for principal, premium and Liquidated Damages, if any, and interest, ratably,
without preference or priority of any kind, according to the amounts due and
payable on the Notes for principal, premium and Liquidated Damages, if any and
interest, respectively; and

         Fourth: to the Company or to such party as a court of competent
jurisdiction shall direct.

         The Trustee may fix a record date and payment date for any payment to
Holders of Notes pursuant to this Section 6.10.

Section 6.11   Undertaking for Costs.

         In any suit for the enforcement of any right or remedy under this
Indenture or in any suit against the Trustee for any action taken or omitted
by it as a Trustee, a court in its discretion may require the filing by any
party litigant in the suit of an undertaking to pay the costs of the suit, and
the court in its discretion may assess reasonable costs, including reasonable
attorneys' fees, against any party litigant in

                                      62
<PAGE>


the suit, having due regard to the merits and good faith of the claims or
defenses made by the party litigant. This Section does not apply to a suit by
the Trustee, a suit by a Holder of a Note pursuant to Section 6.07 hereof, or
a suit by Holders of more than 10% in principal amount of the then outstanding
Notes.


                                   ARTICLE 7
                                    TRUSTEE

Section 7.01   Duties of Trustee.

         (a) If an Event of Default has occurred and is continuing, the Trustee
shall exercise such of the rights and powers vested in it by this Indenture,
and use the same degree of care and skill in its exercise, as a prudent man
would exercise or use under the circumstances in the conduct of his own
affairs.

         (b) Except during the continuance of an Event of Default:

               (i) the duties of the Trustee shall be determined solely by the
         express provisions of this Indenture and the Trustee need perform
         only those duties that are specifically set forth in this Indenture
         and no others, and no implied covenants or obligations shall be read
         into this Indenture against the Trustee; and

              (ii) in the absence of bad faith on its part, the Trustee may
         conclusively rely, as to the truth of the statements and the
         correctness of the opinions expressed therein, upon certificates or
         opinions furnished to the Trustee and conforming to the requirements
         of this Indenture. However, the Trustee shall examine the
         certificates and opinions to determine whether or not they conform to
         the requirements of this Indenture, but need not verify the contents
         thereof.

         (c) The Trustee may not be relieved from liabilities for its own
negligent action, its own negligent failure to act, or its own willful
misconduct, except that:

               (i) this paragraph does not limit the effect of paragraph (b)
         of this Section 7.01;

              (ii) the Trustee shall not be liable for any error of judgment
         made in good faith by a Responsible Officer, unless it is proved that
         the Trustee was negligent in ascertaining the pertinent facts; and

             (iii) the Trustee shall not be liable with respect to any
         action it takes or omits to take in good faith in accordance with a
         direction received by it pursuant to Sections 6.02, 6.04 or 6.05
         hereof.

         (d) Whether or not therein expressly so provided, every provision of
this Indenture that in any way relates to the Trustee is subject to paragraphs
(a), (b), (c), (e) and (f) of this Section 7.01 and Section 7.02 hereof.

         (e) No provision of this Indenture shall require the Trustee to expend
or risk its own funds or incur any liability. The Trustee shall be under no
obligation to exercise any of its rights and powers under this Indenture at
the request of any Holders, unless such Holder shall have offered to the
Trustee security and indemnity satisfactory to it against any loss, liability
or expense.


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<PAGE>


         (f) The Trustee shall not be liable for interest on any money
received by it except as the Trustee may agree in writing with the Company.
Money held in trust by the Trustee need not be segregated from other funds
except to the extent required by law.

Section 7.02   Rights of Trustee.

         (a) The Trustee may conclusively rely and shall be fully protected in
acting or refraining from acting upon any document believed by it to be
genuine and to have been signed or presented by the proper Person. The Trustee
need not investigate any fact or matter stated in the document.

         (b) Before the Trustee acts or refrains from acting, it may require
an Officers' Certificate or an Opinion of Counsel or both. The Trustee shall
not be liable for any action it takes or omits to take in good faith in
reliance on such Officers' Certificate or Opinion of Counsel. The Trustee may
consult with counsel and the advice of such counsel or any Opinion of Counsel
shall be full and complete authorization and protection from liability in
respect of any action taken, suffered or omitted by it hereunder in good faith
and in reliance thereon.

         (c) The Trustee may act through its attorneys and agents and shall
not be responsible for the misconduct or negligence of any agent appointed
with due care.

         (d) The Trustee shall not be liable for any action it takes or omits
to take in good faith that it believes to be authorized or within the rights
or powers conferred upon it by this Indenture.

         (e) Unless otherwise specifically provided in this Indenture, any
demand, request, direction or notice from the Company shall be sufficient if
signed by an Officer of the Company.

         (f) The Trustee shall be under no obligation to exercise any of the
rights or powers vested in it by this Indenture at the request or direction of
any of the Holders unless such Holders shall have offered to the Trustee
reasonable security or indemnity against the costs, expenses and liabilities
that might be incurred by it in compliance with such request or direction.

         (g) Except with respect to Section 4.01 hereof, the Trustee shall
have no duty to inquire as to the performance of the Company's covenants in
Article 4 hereof. In addition, the Trustee shall not be deemed to have
knowledge of any Default or Event of Default except (i) any Event of Default
occurring pursuant to Sections 6.01(a), 6.01(b) and 4.01 or (ii) any Default
or Event of Default of which the Trustee shall have received written
notification or obtained actual knowledge.

         (h) The Trustee shall not be bound to make any investigation into the
facts or matters stated in any resolution, certificate, statement, instrument,
opinion, report, notice, request, direction, consent, order, bond, debenture,
note, other evidence of indebtedness or other paper or document, but the
Trustee may, in its discretion, make such further inquiry or investigation
into such facts or matters as it may see fit and if the Trustee shall
determine to make such further inquiry or investigation, it shall be entitled
to examine the books, records and premises of the Company personally or by
agent or attorney.

         (i) The Trustee shall not be required to give any bond or surety in
respect of the performance of its powers and duties hereunder.

         (j) Delivery of reports, information and documents to the Trustee
under Section 4.03 is for informational purposes only and the Trustee's
receipt of the foregoing shall not constitute constructive notice of any
information contained therein or determinable from information contained
therein, including


                                      64
<PAGE>




the Company's compliance with any of the covenants hereunder (as to which the
Trustee is entitled to rely exclusively on Officers' Certificates).

Section 7.03   Individual Rights of Trustee.

         The Trustee may become the owner or pledgee of Notes and may
otherwise deal with the Company or any Affiliate of the Company with the same
rights it would have if it were not Trustee. However, in the event that the
Trustee acquires any conflicting interest it must eliminate such conflict
within 90 days, apply to the Commission for permission to continue as trustee
or resign. Any Agent may do the same with like rights and duties. The Trustee
is also subject to Sections 7.10 and 7.11 hereof.

Section 7.04   Trustee's Disclaimer.

         The Trustee shall not be responsible for and makes no representation
as to the validity or adequacy of this Indenture or the Notes, it shall not be
accountable for the Company's use of the proceeds from the Notes or any money
paid to the Company or upon the Company's direction under any provision of
this Indenture, it shall not be responsible for the use or application of any
money received by any Paying Agent other than the Trustee, and it shall not be
responsible for any statement or recital herein or any statement in the Notes
or any other document in connection with the sale of the Notes or pursuant to
this Indenture other than its certificate of authentication.

Section 7.05   Notice of Defaults.

         If a Default or Event of Default occurs and is continuing and if it
is known to the Trustee, the Trustee shall mail to Holders of Notes a notice
of the Default or Event of Default within 90 days after such Default or Event
of Default becomes known to the Trustee. Except in the case of a Default or
Event of Default in payment of principal of, premium, if any, or interest or
Liquidated Damages, if any, on any Note, the Trustee may withhold the notice
if and so long as a committee of its Responsible Officers in good faith
determines that withholding the notice is in the interests of the Holders of
the Notes.

Section 7.06   Reports by Trustee to Holders of the Notes.

         Within 60 days after each May 15 beginning with the May 15 following
the date of this Indenture, and for so long as Notes remain outstanding, the
Trustee shall mail to the Holders of the Notes a brief report dated as of such
reporting date that complies with TIA ss. 313(a) (but if no event described in
TIA ss. 313(a) has occurred within the twelve months preceding the reporting
date, no report need be transmitted). The Trustee also shall comply with TIA
ss. (b)(2). The Trustee shall also transmit by mail all reports as required by
TIA ss. 313(c).

         A copy of each report at the time of its mailing to the Holders of
Notes shall be mailed to the Company and filed with the Commission and each
stock exchange on which the Notes are listed in accordance with TIA ss.
313(d). The Company shall promptly notify the Trustee when the Notes are
listed on any stock exchange.

Section 7.07   Compensation and Indemnity.

         The Company shall pay to the Trustee from time to time reasonable
compensation for its acceptance of this Indenture and services hereunder. The
Trustee's compensation shall not be limited by

                                      65
<PAGE>


any law on compensation of a trustee of an express trust. The Company shall
reimburse the Trustee promptly upon request for all reasonable disbursements,
advances and expenses incurred or made by it in addition to the compensation
for its services. Such expenses shall include the reasonable compensation,
disbursements and expenses of the Trustee's agents and counsel.

         The Company and any Guarantor shall jointly and severally indemnify
the Trustee and its agents, employees, officers, directors and shareholders
for, and hold the same harmless against, any and all losses, liabilities or
expenses (including without limitation reasonable attorney's fees and
expenses) incurred by it arising out of or in connection with the acceptance
or administration of its duties under this Indenture, including the costs and
expenses of enforcing this Indenture against the Company (including this
Section 7.07) and defending itself against any claim (whether asserted by the
Company or any Holder or any other person) or liability in connection with the
exercise or performance of any of its powers or duties hereunder, except to
the extent any such loss, liability or expense may be attributable to its
negligence or bad faith. The Trustee shall notify the Company promptly of any
claim for which it may seek indemnity. Failure by the Trustee to so notify the
Company shall not relieve the Company of its obligations hereunder. At the
Trustee's sole discretion, the Company shall defend the claim and the Trustee
shall cooperate in the defense at the Company's expense. The Trustee may have
separate counsel and the Company shall pay the reasonable fees and expenses of
such counsel. The Company need not pay for any settlement made without its
consent, which consent shall not be unreasonably withheld.

         The obligations of the Company and any Guarantor under this Section
7.07 shall survive the resignation or removal of the Trustee and/or the
satisfaction and discharge or termination of this Indenture.

         To secure the Company's payment obligations in this Section, the
Trustee shall have a Lien prior to the Notes on all money or property held or
collected by the Trustee, except that held in trust to pay principal and
interest on particular Notes. Such Lien shall survive the resignation or
removal of the Trustee and/or the satisfaction and discharge or termination of
this Indenture.

         When the Trustee incurs expenses or renders services after an Event
of Default specified in Section 6.01(g) or (h) hereof occurs, the expenses and
the compensation for the services (including the fees and expenses of its
agents and counsel) are intended to constitute expenses of administration
under any Bankruptcy Law.

         The Trustee shall comply with the provisions of TIA ss. 313(b)(2) to
the extent applicable.

Section 7.08   Replacement of Trustee.

         A resignation or removal of the Trustee and appointment of a
successor Trustee shall become effective only upon the successor Trustee's
acceptance of appointment as provided in this Section.

         The Trustee may resign in writing at any time and be discharged from
the trust hereby created by so notifying the Company. The Holders of Notes of
a majority in principal amount of the then outstanding Notes may remove the
Trustee by so notifying the Trustee and the Company in writing. The Company
may remove the Trustee if:

         (a)   the Trustee fails to comply with Section 7.10 hereof;

         (b) the Trustee is adjudged a bankrupt or an insolvent or an order for
relief is entered with respect to the Trustee under any Bankruptcy Law;

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<PAGE>


         (c)   a Custodian or public officer takes charge of the Trustee or its
property; or

         (d)   the Trustee becomes incapable of acting.

         If the Trustee resigns or is removed or if a vacancy exists in the
office of Trustee for any reason, the Company shall promptly appoint a
successor Trustee. Within one year after the successor Trustee takes office,
the Holders of a majority in principal amount of the then outstanding Notes
may appoint a successor Trustee to replace the successor Trustee appointed by
the Company.

         If a successor Trustee does not take office within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company, or
the Holders of Notes of at least 10% in principal amount of the then
outstanding Notes may petition any court of competent jurisdiction for the
appointment of a successor Trustee.

         If the Trustee, after written request by any Holder of a Note who has
been a Holder of a Note for at least six months, fails to comply with Section
7.10 hereof, such Holder of a Note may petition any court of competent
jurisdiction for the removal of the Trustee and the appointment of a successor
Trustee.

         A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Thereupon, the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and duties of the Trustee
under this Indenture. The successor Trustee shall mail a notice of its
succession to Holders of the Notes. The retiring Trustee shall promptly
transfer all property held by it as Trustee to the successor Trustee, provided
all sums owing to the Trustee hereunder have been paid and subject to the Lien
provided for in Section 7.07 hereof. Notwithstanding replacement of the
Trustee pursuant to this Section 7.08, the Company's obligations under Section
7.07 hereof shall continue for the benefit of the retiring Trustee.

Section 7.09   Successor Trustee by Merger, etc.

         If the Trustee consolidates, merges or converts into, or transfers
all or substantially all of its corporate trust business to, another
corporation, the successor corporation without any further act shall be the
successor Trustee.

Section 7.10   Eligibility; Disqualification.

         There shall at all times be a Trustee hereunder that is a corporation
organized and doing business under the laws of the United States of America or
of any state thereof that is authorized under such laws to exercise corporate
trustee power, that is subject to supervision or examination by federal or
state authorities and that has a combined capital and surplus of at least $100
million as set forth in its most recent published annual report of condition.

         This Indenture shall always have a Trustee who satisfies the
requirements of TIAss. 310(a)(1), (2) and (5). The Trustee is subject to TIAss.
310(b).

Section 7.11   Preferential Collection of Claims Against Company.

         The Trustee is subject to TIA ss. 311(a), excluding any creditor
relationship listed in TIA ss. 311(b). A Trustee who has resigned or been
removed shall be subject to TIA ss. 311(a) to the extent indicated therein.


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                                  ARTICLE 8
                   LEGAL DEFEASANCE AND COVENANT DEFEASANCE

Section 8.01   Option to Effect Legal Defeasance or Covenant Defeasance.

         The Company may, at the option of its Board of Directors evidenced by
a resolution set forth in an Officers' Certificate, at any time, elect to have
either Section 8.02 or 8.03 hereof be applied to all outstanding Notes and
Note Guarantees upon compliance with the conditions set forth below in this
Article 8.

Section 8.02   Legal Defeasance and Discharge.

         Upon the Company's exercise under Section 8.01 hereof of the option
applicable to this Section 8.02, the Company and the Guarantors shall, subject
to the satisfaction of the conditions set forth in Section 8.04 hereof, be
deemed to have been discharged from its obligations with respect to all
outstanding Notes, Note Guarantees and this Indenture on the date the
conditions set forth below are satisfied (hereinafter, "Legal Defeasance").
For this purpose, Legal Defeasance means that the Company shall be deemed to
have paid and discharged the entire Indebtedness represented by the
outstanding Notes, Note Guarantees and this Indenture, which Notes shall
thereafter be deemed to be "outstanding" only for the purposes of Section 8.05
hereof and the other Sections of this Indenture referred to in (a) and (b)
below, and to have satisfied all its other obligations under such Notes, Note
Guarantees and this Indenture (and the Trustee, on demand of and at the
expense of the Company, shall execute proper instruments acknowledging the
same), except for the following provisions which shall survive until otherwise
terminated or discharged hereunder:

         (a) the rights of Holders of outstanding Notes to receive payments in
respect of the principal of, premium, if any, and interest and Liquidated
Damages, if any, on those Notes when those payments are due from the trust
referred to below;

         (b) the Company's obligations with respect to the Notes concerning
issuing temporary Notes, registration of Notes, mutilated, destroyed, lost or
stolen Notes and the maintenance of an office or agency for payment and money
for security payments held in trust;

         (c) the rights, powers, trusts, duties and immunities of the Trustee,
and the Company's obligations in connection therewith; and

         (d) the Legal Defeasance provisions of this Indenture.

Section 8.03   Covenant Defeasance.

         Upon the Company's exercise under Section 8.01 hereof of the option
applicable to this Section 8.03, the Company and the Guarantors shall, subject
to the satisfaction of the conditions set forth in Section 8.04 hereof, be
released from its obligations under the covenants contained in Sections 4.07,
4.08, 4.09, 4.10, 4.11, 4.12, 4.14, 4.15, 4.16 and 4.17 hereof with respect to
the outstanding Notes on and after the date the conditions set forth in
Section 8.04 are satisfied (hereinafter, "Covenant Defeasance"), and the Notes
shall thereafter be deemed not "outstanding" for the purposes of any
direction, waiver, consent or declaration or act of Holders (and the
consequences of any thereof) in connection with such covenants, but shall
continue to be deemed "outstanding" for all other purposes hereunder (it being
understood that such Notes shall not be deemed outstanding for accounting
purposes). For this purpose, Covenant

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<PAGE>


Defeasance means that, with respect to the outstanding Notes, the Company and
the Guarantors may omit to comply with and shall have no liability in respect
of any term, condition or limitation set forth in any such covenant, whether
directly or indirectly, by reason of any reference elsewhere herein to any
such covenant or by reason of any reference in any such covenant to any other
provision herein or in any other document and such omission to comply shall
not constitute a Default or an Event of Default under Section 6.01 hereof,
but, except as specified above, the remainder of this Indenture and such Notes
shall be unaffected thereby. In addition, upon the Company's exercise under
Section 8.01 hereof of the option applicable to this Section 8.03 hereof,
subject to the satisfaction of the conditions set forth in Section 8.04
hereof, Sections 6.01(c) through 6.01(f) hereof shall not constitute Events of
Default.

Section 8.04   Conditions to Legal or Covenant Defeasance.

         The following shall be the conditions to the application of either
Section 8.02 or 8.03 hereof to the outstanding Notes and Note Guarantees:

         In order to exercise either Legal Defeasance or Covenant Defeasance:

         (a) the Company must irrevocably deposit with the Trustee, in trust,
for the benefit of the Holders of the Notes, cash in United States dollars,
non-callable Government Securities, or a combination thereof, in those amounts
as will be sufficient, in the opinion of a nationally recognized firm of
independent public accountants, to pay the principal of, premium, if any, and
interest and Liquidated Damages, if any, on the outstanding Notes on the
stated maturity or on the applicable redemption date, as the case may be, and
the Company must specify whether the Notes are being defeased to maturity or
to a particular redemption date;

         (b) in the case of Legal Defeasance, the Company shall have delivered
to the Trustee an Opinion of Counsel in the United States reasonably
acceptable to the Trustee confirming that (i) the Company has received from,
or there has been published by, the Internal Revenue Service; a ruling or (ii)
since the date of this Indenture, there has been a change in the applicable
federal income tax law, in either case to the effect that, and based thereon
such Opinion of Counsel shall confirm that, subject to customary assumptions
and exclusions, the Holders of the outstanding Notes will not recognize
income, gain or loss for federal income tax purposes as a result of such Legal
Defeasance and will be subject to federal income tax on the same amounts, in
the same manner and at the same times as would have been the case if such
Legal Defeasance had not occurred;

         (c) in the case of Covenant Defeasance, the Company shall have
delivered to the Trustee an Opinion of Counsel in the United States reasonably
acceptable to the Trustee confirming that, subject to customary assumptions
and exclusions, the Holders of the outstanding Notes will not recognize
income, gain or loss for federal income tax purposes as a result of such
Covenant Defeasance and will be subject to federal income tax on the same
amounts, in the same manner and at the same times as would have been the case
if such Covenant Defeasance had not occurred;

         (d) no Default or Event of Default shall have occurred and be
continuing on the date of that deposit (other than a Default or Event of
Default resulting from the borrowing of funds to be applied to such deposit)
or, insofar as Events of Default from bankruptcy or insolvency events are
concerned, at any time in the period ending on the 123rd day after the date of
deposit;

         (e) that Legal Defeasance or Covenant Defeasance will not result in a
breach or violation of, or constitute a default under, any material agreement
or instrument (other than this Indenture) to which the Company or any of its
Subsidiaries is a party or by which the Company or any of its Subsidiaries is
bound;

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         (f) the Company must have delivered to the Trustee an Opinion of
Counsel to the effect that, subject to customary assumptions and exclusions,
after the 123rd day following the deposit, the trust funds will not be subject
to the effect of Section 547 of the United States Bankruptcy Code or any
analogous New York State law provision or any other applicable federal or New
York bankruptcy, insolvency, reorganization or similar laws affecting
creditors' rights generally;

         (g) the Company must deliver to the Trustee an Officers' Certificate
stating that the deposit was not made by the Company with the intent of
preferring the Holders of Notes over the other creditors of the Company with
the intent of defeating, hindering, delaying or defrauding creditors of the
Company or others; and

         (h) the Company must deliver to the Trustee an Officers' Certificate
and an Opinion of Counsel (which opinion may be subject to customary
assumptions and exclusions), each stating that all conditions precedent
provided for relating to the Legal Defeasance or the Covenant Defeasance have
been complied with.

Section 8.05   Deposited Money and Government Securities to be Held in Trust;
               Other Miscellaneous Provisions.

         Subject to Section 8.06 hereof, all money and non-callable Government
Securities (including the proceeds thereof) deposited with the Trustee (or
other qualifying trustee, collectively for purposes of this Section 8.05, the
"Trustee") pursuant to Section 8.04 hereof in respect of the outstanding Notes
shall be held in trust and applied by the Trustee, in accordance with the
provisions of such Notes and this Indenture, to the payment, either directly
or through any Paying Agent (including the Company acting as Paying Agent) as
the Trustee may determine, to the Holders of such Notes of all sums due and to
become due thereon in respect of principal, premium, if any, and interest and
Liquidated Damages, if any, but such money need not be segregated from other
funds except to the extent required by law.

         The Company shall pay and indemnify the Trustee against any tax, fee
or other charge imposed on or assessed against the cash or non-callable
Government Securities deposited pursuant to Section 8.04 hereof or the
principal and interest received in respect thereof other than any such tax,
fee or other charge which by law is for the account of the Holders of the
outstanding Notes.

         Anything in this Article 8 to the contrary notwithstanding, the
Trustee shall deliver or pay to the Company from time to time upon the request
of the Company any money or non-callable Government Securities held by it as
provided in Section 8.04 hereof which, in the opinion of a nationally
recognized firm of independent public accountants expressed in a written
certification thereof delivered to the Trustee (which may be the opinion
delivered under Section 8.04(a) hereof), are in excess of the amount thereof
that would then be required to be deposited to effect an equivalent Legal
Defeasance or Covenant Defeasance.

Section 8.06   Repayment to Company.

         Any money deposited with the Trustee or any Paying Agent, or then
held by the Company, in trust for the payment of the principal of, premium, if
any, or interest or Liquidated Damages, if any, on any Note and remaining
unclaimed for two years after such principal, and premium, if any, or interest
or Liquidated Damages, if any, has become due and payable shall be paid to the
Company on its request or (if then held by the Company) shall be discharged
from such trust; and the Holder of such Note shall thereafter, as a secured
creditor, look only to the Company for payment thereof, and all liability of
the Trustee or such Paying Agent with respect to such trust money, and all
liability of the Company as

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<PAGE>


trustees thereof, shall thereupon cease; provided, however, that the Trustee
or such Paying Agent, before being required to make any such repayment, may at
the expense of the Company cause to be published once, in the New York Times
and The Wall Street Journal (national edition), notice that such money remains
unclaimed and that, after a date specified therein, which shall not be less
than 30 days from the date of such notification or publication, any unclaimed
balance of such money then remaining will be repaid to the Company.

Section 8.07   Reinstatement.

         If the Trustee or Paying Agent is unable to apply any United States
dollars or non-callable Government Securities in accordance with Section 8.02
or 8.03 hereof, as the case may be, by reason of any order or judgment of any
court or governmental authority enjoining, restraining or otherwise
prohibiting such application, then the Company's obligations under this
Indenture, the Notes and the Note Guarantees shall be revived and reinstated
as though no deposit had occurred pursuant to Section 8.02 or 8.03 hereof
until such time as the Trustee or Paying Agent is permitted to apply all such
money in accordance with Section 8.02 or 8.03 hereof, as the case may be;
provided, however, that, if the Company makes any payment of principal of,
premium, if any, or interest or Liquidated Damages, if any, on any Note
following the reinstatement of its obligations, the Company shall be
subrogated to the rights of the Holders of such Notes to receive such payment
from the money held by the Trustee or Paying Agent.


                                   ARTICLE 9
                       AMENDMENT, SUPPLEMENT AND WAIVER

Section 9.01   Without Consent of Holders of Notes.

         Notwithstanding Section 9.02 of this Indenture, the Company, the
Guarantors and the Trustee may amend or supplement this Indenture, the Note
Guarantees or the Notes without the consent of any Holder of a Note:

         (a) to cure any ambiguity, defect or inconsistency;

         (b) to provide for uncertificated Notes in addition to or in place of
certificated Notes or to alter the provisions of Article 2 hereof (including
the related definitions) in a manner that does not materially adversely affect
any Holder;

         (c) to provide for the assumption of the Company's obligations to the
Holders of the Notes by a successor to the Company pursuant to Article 5 or
Article 11 hereof or to provide for the assumption of any Guarantor's
obligations under its Note Guarantee in the case of a merger or consolidation
of the Guarantor;

         (d) to make any change that would provide any additional rights or
benefits to the Holders of the Notes or that does not materially adversely
affect the legal rights hereunder of any Holder of the Note;

         (e) to comply with requirements of the Commission in order to effect
or maintain the qualification of this Indenture under the TIA;

         (f) to provide for the issuance of Additional Notes in accordance
with the limitations set forth in this Indenture as of the date hereof; or

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<PAGE>


         (g) to allow any Guarantor to execute a supplemental indenture and/or
a Note Guarantee with respect to the Notes.

         Upon the request of the Company accompanied by a resolution of its
Board of Directors authorizing the execution of any such amended or
supplemental Indenture, and upon receipt by the Trustee of the documents
described in Section 7.02 hereof, the Trustee shall join with the Company and
the Guarantors in the execution of any amended or supplemental Indenture
authorized or permitted by the terms of this Indenture and to make any further
appropriate agreements and stipulations that may be therein contained, but the
Trustee shall not be obligated to enter into such amended or supplemental
Indenture that affects its own rights, duties or immunities under this
Indenture or otherwise.

Section 9.02   With Consent of Holders of Notes.

         Except as provided below in this Section 9.02, the Company, the
Guarantors and the Trustee may amend or supplement this Indenture (including
Section 3.09, 4.10 and 4.14 hereof), the Note Guarantees and the Notes may be
amended or supplemented with the consent of the Holders of at least a majority
in principal amount of the Notes (including Additional Notes, if any) then
outstanding voting as a single class (including consents obtained in
connection with a tender offer or exchange offer for, or purchase of, the
Notes), and, subject to Sections 6.04 and 6.07 hereof, any existing Default or
Event of Default (other than a Default or Event of Default in the payment of
the principal of, premium, if any, or interest or Liquidated Damages, if any,
on the Notes, except a payment default resulting from an acceleration that has
been rescinded) or compliance with any provision of this Indenture, the Note
Guarantees or the Notes may be waived with the consent of the Holders of a
majority in principal amount of the then outstanding Notes (including
Additional Notes, if any) voting as a single class (including consents
obtained in connection with a tender offer or exchange offer for, or purchase
of, the Notes). Notwithstanding the foregoing, any (i) amendment to or waiver
of Section 4.14 hereof, and (ii) amendment to Article 10 herein will require
the consent of the Holders of at least two-thirds in aggregate principal
amount of the Notes then outstanding if such amendment would materially
adversely affect the rights of Holders of Notes. Section 2.08 hereof shall
determine which Notes are considered to be "outstanding" for purposes of this
Section 9.02.

         Upon the request of the Company accompanied by a resolution of its
Board of Directors authorizing the execution of any such amended or
supplemental Indenture, and upon the filing with the Trustee of evidence
satisfactory to the Trustee of the consent of the Holders of Notes as
aforesaid, and upon receipt by the Trustee of the documents described in
Section 7.02 hereof, the Trustee shall join with the Company and the
Guarantors in the execution of such amended or supplemental Indenture unless
such amended or supplemental Indenture directly affects the Trustee's own
rights, duties or immunities under this Indenture or otherwise, in which case
the Trustee may in its discretion, but shall not be obligated to, enter into
such amended or supplemental Indenture.

         It shall not be necessary for the consent of the Holders of Notes
under this Section 9.02 to approve the particular form of any proposed
amendment or waiver, but it shall be sufficient if such consent approves the
substance thereof.

         After an amendment, supplement or waiver under this Section 9.02
becomes effective, the Company shall mail to the Holders of Notes affected
thereby a notice briefly describing the amendment, supplement or waiver. Any
failure of the Company to mail such notice, or any defect therein, shall not,
however, in any way impair or affect the validity of any such amended or
supplemental Indenture or waiver. Subject to Sections 6.04 and 6.07 hereof,
the Holders of a majority in aggregate principal amount

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<PAGE>


of the Notes (including Additional Notes, if any) then outstanding voting as a
single class may waive compliance in a particular instance by the Company with
any provision of this Indenture or the Notes. However, without the consent of
each Holder affected, an amendment or waiver under this Section 9.02 may not
(with respect to any Notes held by a non-consenting Holder):

         (a) reduce the principal amount of Notes whose Holders must consent
to an amendment, supplement or waiver;

         (b) reduce the principal of or change the fixed maturity of any Note
or alter the provisions with respect to the redemption of the Notes (other
than Section 4.14 hereof);

         (c) reduce the rate of or extend the time for payment of interest on
any Note;

         (d) waive a Default or Event of Default in the payment of principal
of or premium, if any, or interest or Liquidated Damages, if any, on the Notes
(except a rescission of acceleration of the Notes by the Holders of at least a
majority in aggregate principal amount of the Notes and a waiver of the
payment default that resulted from such acceleration);

         (e) make any Note payable in money other than that stated in the
Notes;

         (f) make any change in the provisions of this Indenture relating to
waivers of past Defaults;

         (g) waive a redemption payment with respect to any Note (other than
Section 4.14 hereof);

         (h) release any Guarantor from any of its obligations under its Note
Guarantee or this Indenture, except in accordance with the terms of this
Indenture; or

         (i) make any change in the foregoing amendment and waiver provisions.

Section 9.03   Compliance with Trust Indenture Act.

         Every amendment or supplement to this Indenture or the Notes shall be
set forth in an amended or supplemental Indenture that complies with the TIA
as then in effect.

Section 9.04   Revocation and Effect of Consents.

         Until an amendment, supplement or waiver becomes effective, a consent
to it by a Holder of a Note is a continuing consent by the Holder of a Note
and every subsequent Holder of a Note or portion of a Note that evidences the
same debt as the consenting Holder's Note, even if notation of the consent is
not made on any Note. However, any such Holder of a Note or subsequent Holder
of a Note may revoke the consent as to its Note if the Trustee receives
written notice of revocation before the date the waiver, supplement or
amendment becomes effective. An amendment, supplement or waiver becomes
effective in accordance with its terms and thereafter binds every Holder.

Section 9.05   Notation on or Exchange of Notes.

         The Trustee may place an appropriate notation about an amendment,
supplement or waiver on any Note thereafter authenticated. The Company in
exchange for all Notes may issue and the Trustee shall, upon receipt of an
Authentication Order, authenticate new Notes that reflect the amendment,
supplement or waiver.


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         Failure to make the appropriate notation or issue a new Note shall
not affect the validity and effect of such amendment, supplement or waiver.

Section 9.06      Trustee to Sign Amendments, etc.

         The Trustee shall sign any amended or supplemental Indenture
authorized pursuant to this Article 9 if the amendment or supplement does not
adversely affect the rights, duties, liabilities or immunities of the Trustee.
The Company may not sign an amendment or supplemental Indenture until its
Board of Directors approves it. In executing any amended or supplemental
indenture, the Trustee shall be entitled to receive and (subject to Section
7.01 hereof) shall be fully protected in relying upon, in addition to the
documents required by Section 11.04 hereof, an Officer's Certificate and an
Opinion of Counsel stating that the execution of such amended or supplemental
indenture is authorized or permitted by this Indenture.


                                  ARTICLE 10
                                 SUBORDINATION

Section 10.01  Agreement to Subordinate.

         The Company agrees, and each Holder by accepting a Note agrees, that
the payment of Subordinated Note Obligations are subordinated in right of
payment, to the extent and in the manner set forth in this Article 10, to the
prior payment in full in cash or cash equivalents of all Senior Indebtedness,
whether outstanding on the date of this Indenture or thereafter incurred and
that the subordination is for the benefit of the holders of Senior
Indebtedness. The provisions of this Article 10 shall constitute a continuing
offer to all Persons that, in reliance upon such provisions, become holders
of, or continue to hold Senior Indebtedness, and they or each of them may
enforce the rights of holders of Senior Indebtedness hereunder, subject to the
terms and provisions hereof.

Section 10.02  Certain Definitions.

         "cash equivalents" means Cash Equivalents of the type described in
clause (i) of the definition thereof maturing not more than 90 days after the
date of the acquisition thereof.

         "Designated Senior Indebtedness" means (a) any Indebtedness
outstanding under the New Credit Facility; and (b) any other Senior
Indebtedness permitted under this Indenture the principal amount of which is
$25.0 million or more and that has been designated by the Company in writing
to the Trustee as "Designated Senior Indebtedness."

         "Permitted Junior Securities" means Equity Interests in the Company
or debt securities of the Company that are subordinated to all Senior
Indebtedness and any debt securities issued in exchange for Senior
Indebtedness to substantially the same extent as, or to a greater extent than,
the Notes are subordinated to Senior Indebtedness.

         "Representative" means the indenture trustee or other trustee, agent
or representative for any Senior Indebtedness.

         "Senior Indebtedness" means, with respect to any Person, (a) all
Obligations of that Person outstanding under the New Credit Facility and all
Hedging Obligations payable to a lender or an Affiliate thereof or to a Person
that was a lender or an Affiliate thereof at the time the contract was entered
into under the New Credit Facility or any of its Affiliates, including,
without limitation, interest accruing

                                      74
<PAGE>

subsequent to the filing of, or which would have accrued but for the filing
of, a petition for bankruptcy, whether or not that interest is an allowable
claim in that bankruptcy proceeding; (b) any other Indebtedness, unless the
instrument under which that Indebtedness is incurred expressly provides that
it is subordinated in right of payment to any other Senior Indebtedness of
that Person; and (c) all Obligations with respect to the foregoing.
Notwithstanding anything to the contrary in the foregoing, Senior Indebtedness
will not include (i) any liability for federal, state, local or other taxes;
(ii) any Indebtedness of that Person, other than pursuant to the New Credit
Facility, to any of its Subsidiaries or other Affiliates; (iii) any trade
payables; or (iv) any Indebtedness that is incurred in violation of this
Indenture.

         "Subordinated Note Obligations" means all Obligations with respect to
the Notes, including, without limitation, principal, premium, if any, interest
and Liquidated Damages, if any, payable pursuant to the terms of the Notes
(including upon the acceleration or redemption thereof), together with and
including any amounts received or receivable upon the exercise of rights of
rescission or other rights of action, including claims for damages, or
otherwise.

         A "distribution" or "payment" may consist of a distribution, payment
or other transfer of assets by or on behalf of the Company (including, without
limitation, a redemption, repurchase or other acquisition of the Notes) from
any source, of any kind or character, whether in cash, securities or other
property, by set-off or otherwise.

Section 10.03  Liquidation; Dissolution; Bankruptcy.

         Upon any distribution to creditors of the Company in a liquidation or
dissolution of the Company or in a bankruptcy, reorganization, insolvency,
receivership or similar proceeding relating to the Company or its property, an
assignment for the benefit of creditors or any marshalling of the Company's
assets and liabilities, (a) the holders of Senior Indebtedness will be
entitled to receive payment in full in cash or cash equivalents of all
Obligations due in respect of such Senior Indebtedness, including interest
after the commencement of any such proceeding at the rate specified in the
applicable Senior Indebtedness, before the Holders of Notes will be entitled
to receive any payment with respect to the Subordinated Note Obligations
(except that Holders of Notes may receive and retain Permitted Junior
Securities and payments and other distributions made from the trust described
in Section 8.04 hereof), and (b) until all Obligations with respect to Senior
Indebtedness are paid in full in cash or cash equivalents, any distribution to
which the Holders of Notes would be entitled but for this Article 10 shall be
made to the holders of Senior Indebtedness (except that Holders of Notes may
receive and retain Permitted Junior Securities and payments and other
distributions made from the trust described in Section 8.04 hereof) as their
interests appear.

Section 10.04  Default on Designated Senior Indebtedness.

         The Company may not make any payment or distribution to the Trustee
or any Holder upon or in respect of the Subordinated Note Obligations (except
in Permitted Junior Securities or from the trust described in Section 8.04
hereof) until all principal and other obligations with respect to Senior
Indebtedness have been paid in full in cash or cash equivalents, if:

         (a) a default in the payment of the principal (including
reimbursement obligations in respect of letters of credit) of, premium, if
any, or interest on or commitment, letter of credit or administrative fees
relating to, Designated Senior Indebtedness occurs and is continuing beyond
any applicable period of grace in the agreement, indenture or other document
governing such Designated Senior Indebtedness; or


                                      75
<PAGE>


         (b) any other default occurs and is continuing with respect to
Designated Senior Indebtedness that permits holders of the Designated Senior
Indebtedness as to which that default relates to accelerate its maturity and
the Trustee receives a notice of such default (a "Payment Blockage Notice")
from the Company or the holders of any Designated Senior Indebtedness (or
their Representative).

         Payments on the Notes may and shall be resumed (a) in the case of a
payment default, upon the date on which that default is cured or waived; and
(b) in case of a nonpayment default, the earlier of the date on which that
nonpayment default is cured or waived or 179 days after the date on which the
applicable Payment Blockage Notice is received, unless the maturity of any
Designated Senior Indebtedness has been accelerated. No new period of payment
blockage may be commenced unless and until 360 days have elapsed since the
effectiveness of the immediately prior Payment Blockage Notice. No nonpayment
default that existed or was continuing on the date of delivery of any Payment
Blockage Notice to the Trustee shall be, or be made, the basis for a
subsequent Payment Blockage Notice unless that default shall have been waived
or cured for a period of not less than 90 days.

Section 10.05 Acceleration of Securities.

         If payment of the Notes is accelerated because of an Event of
Default, the Company shall promptly notify holders of Senior Indebtedness of
the acceleration.

Section 10.06  When Distribution Must Be Paid Over.

         In the event that the Trustee or any Holder receives any payment of
any Subordinated Note Obligations at a time when the Trustee or such Holder,
as applicable, has actual knowledge that such payment is prohibited by Section
10.03 or 10.04 hereof, such payment shall be held by the Trustee or such
Holder, in trust for the benefit of, and shall be paid forthwith over and
delivered, upon written request, to, the holders of Senior Indebtedness as
their interests may appear or their Representative under the indenture or
other agreement (if any) pursuant to which Senior Indebtedness may have been
issued, as their respective interests may appear, for application to the
payment of all Obligations with respect to Senior Indebtedness remaining
unpaid to the extent necessary to pay such Obligations in full in accordance
with their terms, after giving effect to any concurrent payment or
distribution to or for the holders of Senior Indebtedness.

         With respect to the holders of Senior Indebtedness, the Trustee
undertakes to perform only such obligations on the part of the Trustee as are
specifically set forth in this Article 10, and no implied covenants or
obligations with respect to the holders of Senior Indebtedness shall be read
into this Indenture against the Trustee. The Trustee shall not be deemed to
owe any fiduciary duty to the holders of Senior Indebtedness, and shall not be
liable to any such holders if the Trustee shall pay over or distribute to or
on behalf of Holders or the Company or any other Person money or assets to
which any holders of Senior Indebtedness shall be entitled by virtue of this
Article 10, except if such payment is made as a result of the willful
misconduct or gross negligence of the Trustee.

Section 10.07 Notice by Company.

         The Company shall promptly notify the Trustee and the Paying Agent of
any facts known to the Company that would cause a payment of any Obligations
with respect to the Notes to violate this Article 10, but failure to give such
notice shall not affect the subordination of the Notes to the Senior
Indebtedness as provided in this Article 10.


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Section 10.08  Subrogation.

         After all Senior Indebtedness is paid in full in cash or cash
equivalents and until the Notes are paid in full, Holders of Notes shall be
subrogated (equally and ratably with all other Indebtedness pari passu with
the Notes) to the rights of holders of Senior Indebtedness to receive
distributions applicable to Senior Indebtedness to the extent that
distributions otherwise payable to the Holders of Notes have been applied to
the payment of Senior Indebtedness. A distribution made under this Article 10
to holders of Senior Indebtedness that otherwise would have been made to
Holders of Notes is not, as between the Company and Holders, a payment by the
Company on the Notes.

Section 10.09  Relative Rights.

         This Article 10 defines the relative rights of Holders of Notes and
holders of Senior Indebtedness. Nothing in this Indenture shall:

         (1) impair, as between the Company and Holders of Notes, the
obligation of the Company, which is absolute and unconditional, to pay
principal of and interest and Liquidated Damages, if any, on the Notes in
accordance with their terms;

         (2) affect the relative rights of Holders of Notes and creditors of
the Company other than their rights in relation to holders of Senior
Indebtedness; or

         (3) prevent the Trustee or any Holder of Notes from exercising its
available remedies upon a Default or Event of Default, subject to the rights
of holders and owners of Senior Indebtedness to receive distributions and
payments otherwise payable to Holders of Notes.

         If the Company fails because of this Article 10 to pay principal of
or interest or Liquidated Damages, if any, on a Note on the due date, the
failure is still a Default or Event of Default.

Section 10.10  Subordination May Not Be Impaired by Company.

         No right of any holder of Senior Indebtedness to enforce the
subordination of the Indebtedness evidenced by the Notes shall be impaired by
any act or failure to act by the Company or any Holder or by the failure of
the Company or any Holder to comply with this Indenture.

Section 10.11  Distribution or Notice to Representative.

         Whenever a distribution is to be made or a notice given to holders of
Senior Indebtedness, the distribution may be made and the notice given to
their Representative.

         Upon any payment or distribution of assets of the Company referred to
in this Article 10, the Trustee and the Holders of Notes shall be entitled to
rely upon any order or decree made by any court of competent jurisdiction or
upon any certificate of such Representative or of the liquidating trustee or
agent or other Person making any distribution to the Trustee or to the Holders
of Notes for the purpose of ascertaining the Persons entitled to participate
in such distribution, the holders of the Senior Indebtedness and other
Indebtedness of the Company, the amount thereof or payable thereon, the amount
or amounts paid or distributed thereon and all other facts pertinent thereto
or to this Article 10.


                                      77
<PAGE>


Section 10.12  Rights of Trustee and Paying Agent.

         Notwithstanding the provisions of this Article 10 or any other
provision of this Indenture, the Trustee shall not be charged with knowledge
of the existence of any facts that would prohibit the making of any payment or
distribution by the Trustee, and the Trustee and the Paying Agent may continue
to make payments on the Notes, unless the Trustee shall have received at its
Corporate Trust Office at least five Business Days prior to the date of such
payment written notice of facts that would cause the payment of any
Obligations with respect to the Notes to violate this Article 10. Only the
Company or a Representative may give the notice. Nothing in this Article 10
shall impair the claims of, or payments to, the Trustee under or pursuant to
Section 7.07 hereof.

         The Trustee in its individual or any other capacity may hold Senior
Indebtedness with the same rights it would have if it were not Trustee. Any
Agent may do the same with like rights.

Section 10.13  Authorization to Effect Subordination.

         Each Holder of Notes, by the Holder's acceptance thereof, authorizes
and directs the Trustee on such Holder's behalf to take such action as may be
necessary or appropriate to effectuate the subordination as provided in this
Article 10, and appoints the Trustee to act as such Holder's attorney-in-fact
for any and all such purposes. If the Trustee does not file a proper proof of
claim or proof of debt in the form required in any proceeding referred to in
Section 6.09 hereof at least 30 days before the expiration of the time to file
such claim, the Representative is hereby authorized to file an appropriate
claim for and on behalf of the Holders of the Notes.

Section 10.14  No Waiver of Subordination Provisions.

         (a) No right of any present or future holder of any Senior
Indebtedness to enforce subordination as herein provided shall at any time in
any way be prejudiced or impaired by any act or failure to act by any such
holder.

         (b) Without in any way limiting the generality of paragraph (a) of
this Section 10.14, the holders of Senior Indebtedness may, at any time and
from time to time, without the consent of or notice to the Trustee or any
Holder, without incurring responsibility to any Holder and without impairing
or releasing the subordination provided in this Article 10 or the obligations
hereunder of the Holders to the holders of Senior Indebtedness, do any one or
more of the following: (i) change the manner, place or terms of payment or
extend the time of payment of, or renew or alter, any Senior Indebtedness or
any instrument evidencing the same or any agreement under which Senior
Indebtedness is outstanding; (ii) sell, exchange, release or otherwise deal
with any property pledged, mortgaged or otherwise securing Senior
Indebtedness; (iii) release any Person liable in any manner for the collection
of Senior Indebtedness; and (iv) exercise or refrain from exercising any
rights against either Company or any other Person.

Section 10.15  Amendments.

         The provisions of this Article 10 shall not be amended or modified
without the written consent of the holders of all Senior Indebtedness.


                                      78
<PAGE>


Section 10.16  Trustee's Compensation not Prejudiced.

         Nothing in this Article 10 shall apply to amounts due to the Trustee
pursuant to other Sections of this Indenture.


                                  ARTICLE 11
                                NOTE GUARANTEES

Section 11.01  Guarantee.

         Subject to this Article 11, each of the Guarantors hereby, jointly
and severally, unconditionally guarantees to each Holder of a Note
authenticated and delivered by the Trustee and to the Trustee and its
successors and assigns, irrespective of the validity and enforceability of
this Indenture, the Notes or the obligations of the Company hereunder or
thereunder, that: (1) the principal of and interest on the Notes will be
promptly paid in full when due, whether at maturity, by acceleration,
redemption or otherwise, and interest on the overdue principal of and interest
on the Notes, if any, if lawful, and all other obligations of the Company to
the Holders or the Trustee hereunder or thereunder will be promptly paid in
full or performed, all in accordance with the terms hereof and thereof; and
(2) in case of any extension of time of payment or renewal of any Notes or any
of such other obligations, that same will be promptly paid in full when due or
performed in accordance with the terms of the extension or renewal, whether at
stated maturity, by acceleration or otherwise. Failing payment when due of any
amount so guaranteed or any performance so guaranteed for whatever reason, the
Guarantors shall be jointly and severally obligated to pay the same
immediately. Each Guarantor agrees that this is a guarantee of payment and not
a guarantee of collection.

         The Guarantors hereby agree that their obligations hereunder shall be
unconditional, irrespective of the validity, regularity or enforceability of
the Notes or this Indenture, the absence of any action to enforce the same,
any waiver or consent by any Holder of the Notes with respect to any
provisions hereof or thereof, the recovery of any judgment against the
Company, any action to enforce the same or any other circumstance which might
otherwise constitute a legal or equitable discharge or defense of a Guarantor.
Each Guarantor hereby waives diligence, presentment, demand of payment, filing
of claims with a court in the event of insolvency or bankruptcy of the
Company, any right to require a proceeding first against the Company, protest,
notice and all demands whatsoever and covenant that this Note Guarantee shall
not be discharged except by complete performance of the obligations contained
in the Notes and this Indenture.

         If any Holder or the Trustee is required by any court or otherwise to
return to the Company, the Guarantors or any custodian, trustee, liquidator or
other similar official acting in relation to either the Company or the
Guarantors, any amount paid by either to the Trustee or such Holder, this Note
Guarantee, to the extent theretofore discharged, shall be reinstated in full
force and effect.

         Each Guarantor agrees that it shall not be entitled to any right of
subrogation in relation to the Holders in respect of any obligations
guaranteed hereby until payment in full of all obligations guaranteed hereby.
Each Guarantor further agrees that, as between the Guarantors, on the one
hand, and the Holders and the Trustee, on the other hand, (1) the maturity of
the obligations guaranteed hereby may be accelerated as provided in Article 6
hereof for the purposes of this Note Guarantee, notwithstanding any stay,
injunction or other prohibition preventing such acceleration in respect of the
obligations guaranteed hereby, and (2) in the event of any declaration of
acceleration of such obligations as provided in Article 6 hereof, such
obligations (whether or not due and payable) shall forthwith become due and
payable by the Guarantors for the purpose of this Note Guarantee. The
Guarantors shall have the right to seek


                                      79
<PAGE>


contribution from any non-paying Guarantor so long as the exercise of such right
does not impair the rights of the Holders under the Guarantee.

Section 11.02  Subordination of Note Guarantee.

         The Obligations of each Guarantor under its Note Guarantee pursuant
to this Article 11 shall be junior and subordinated to the Senior Guarantee of
such Guarantor on the same basis as the Notes are junior and subordinated to
Senior Indebtedness of the Company. For the purposes of the foregoing
sentence, the Trustee and the Holders shall have the right to receive and/or
retain payments by any of the Guarantors only at such times as they may
receive and/or retain payments in respect of the Notes pursuant to this
Indenture, including Article 10 hereof with respect to subordination.

Section 11.03  Limitation of Guarantor Liability.

         Each Guarantor, and by its acceptance of Notes, each Holder, hereby
confirms that it is the intention of all such parties that the Note Guarantee
of such Guarantor not constitute a fraudulent transfer or conveyance for
purposes of Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform
Fraudulent Transfer Act or any similar federal or state law to the extent
applicable to any Note Guarantee. To effectuate the foregoing intention, the
Trustee, the Holders and the Guarantors hereby irrevocably agree that the
obligations of such Guarantor will, after giving effect to such maximum amount
and all other contingent and fixed liabilities of such Guarantor that are
relevant under such laws, and after giving effect to any collections from,
rights to receive contribution from or payments made by or on behalf of any
other Guarantor in respect of the obligations of such other Guarantor under
this Article 11, result in the obligations of such Guarantor under its Note
Guarantee not constituting a fraudulent transfer or conveyance.

Section 11.04  Execution And Delivery Of Note Guarantee.

         To evidence its Note Guarantee set forth in Section 11.01, each
Guarantor hereby agrees that a notation of such Note Guarantee substantially
in the form included in Exhibit E shall be endorsed by an Officer of such
Guarantor on each Note authenticated and delivered by the Trustee and that
this Indenture shall be executed on behalf of such Guarantor by its President
or one of its Vice Presidents.

         Each Guarantor hereby agrees that its Note Guarantee set forth in
Section 11.01 shall remain in full force and effect notwithstanding any
failure to endorse on each Note a notation of such Note Guarantee.

         If an Officer whose signature is on this Indenture or on the Note
Guarantee no longer holds that office at the time the Trustee authenticates
the Note on which a Note Guarantee is endorsed, the Note Guarantee shall be
valid nevertheless.

         The delivery of any Note by the Trustee, after the authentication
thereof hereunder, shall constitute due delivery of the Note Guarantee set
forth in this Indenture on behalf of the Guarantors.

         In the event that the Company creates or acquires any new
Subsidiaries subsequent to the date of this Indenture, if required by Section
4.17 hereof, the Company shall cause such Subsidiaries to execute supplemental
indentures to this Indenture and Note Guarantees in accordance with Section
4.17 hereof and this Article 11, to the extent applicable.


                                      80
<PAGE>


Section 11.05  Guarantors May Consolidate, Etc., On Certain Terms.

         Except as otherwise provided in Section 11.06, no Guarantor may
consolidate with or merge with or into (whether or not such Guarantor is the
surviving Person) another Person whether or not affiliated with such Guarantor
unless:

         (a) subject to Section 11.06 hereof, the Person formed by or
surviving any such consolidation or merger (if other than a Guarantor or the
Company) unconditionally assumes all the obligations of such Guarantor,
pursuant to a supplemental indenture in form and substance reasonably
satisfactory to the Trustee, under the Notes, this Indenture, the Note
Guarantees and the Registration Rights Agreement on the terms set forth herein
or therein; and

         (b) immediately after giving effect to such transaction, no Default
or Event of Default exists.

         In case of any such consolidation, merger, sale or conveyance and
upon the assumption by the successor Person, by supplemental indenture,
executed and delivered to the Trustee and satisfactory in form to the Trustee,
of the Note Guarantees endorsed upon the Notes and the due and punctual
performance of all of the covenants and conditions of this Indenture to be
performed by the Guarantor, such successor Person shall succeed to and be
substituted for the Guarantor with the same effect as if it had been named
herein as a Guarantor. Such successor Person thereupon may cause to be signed
any or all of the Note Guarantees to be endorsed upon all of the Notes
issuable hereunder which theretofore shall not have been signed by the Company
and delivered to the Trustee. All the Note Guarantees so issued shall in all
respects have the same legal rank and benefit under this Indenture as the Note
Guarantees theretofore and thereafter issued in accordance with the terms of
this Indenture as though all of such Note Guarantees had been issued at the
date of the execution hereof.

         Except as set forth in Articles 4 and 5 hereof, and notwithstanding
clauses (a) and (b) above, nothing contained in this Indenture or in any of
the Notes shall prevent any consolidation or merger of a Guarantor with or
into the Company or another Guarantor, or shall prevent any sale or conveyance
of the property of a Guarantor as an entirety or substantially as an entirety
to the Company or another Guarantor.

Section 11.06  Releases Following Sale Of Assets.

         In the event of a sale or other disposition of all of the assets of a
Guarantor, by way of merger, consolidation or otherwise, or a sale or other
disposition of all to the capital stock of a Guarantor, in each case to a
Person that is not (either before or after giving effect to such transactions)
a Restricted Subsidiary of the Company, then such Guarantor (in the event of a
sale or other disposition, by way of merger, consolidation or otherwise, of
all of the capital stock of such Guarantor) or the corporation acquiring the
property (in the event of a sale or other disposition of all or substantially
all of the assets of such Guarantor) will be released and relieved of any
obligations under its Note Guarantee; provided that the Net Proceeds of such
sale or other disposition are applied in accordance with the applicable
provisions of this Indenture, including without limitation Section 4.10
hereof. Upon delivery by the Company to the Trustee of an Officers'
Certificate and an Opinion of Counsel to the effect that such sale or other
disposition was made by the Company in accordance with the provisions of this
Indenture, including without limitation Section 4.10 hereof, the Trustee shall
execute any documents reasonably required in order to evidence the release of
any Guarantor from its obligations under its Note Guarantee.

         Any Guarantor not released from its obligations under its Note
Guarantee shall remain liable for the full amount of principal of and interest
on the Notes and for the other obligations of any Guarantor under this
Indenture as provided in this Article 11.

                                      81
<PAGE>


                                  ARTICLE 12
                                 MISCELLANEOUS

Section 12.01  Trust Indenture Act Controls.

         If any provision of this Indenture limits, qualifies or conflicts
with the duties imposed by TIA Sec. 318(c), the imposed duties shall control.

Section 12.02  Notices.

         Any notice or communication by the Company, any Guarantor or the
Trustee to the others is duly given if in writing and delivered in Person or
mailed by first class mail (registered or certified, return receipt
requested), telex, telecopier or overnight air courier guaranteeing next day
delivery, to the others' address.

         If to the Company or any Guarantor:

                  251 Ballardvale Street
                  Wilmington, MA 01887
                  Telecopier No.: 978-988-5665
                  Attention: General Counsel

         With a copy to:

                  Davis Polk & Wardwell
                  450 Lexington Avenue
                  New York, New York 10017
                  Telecopier No.: (212) 450-4800
                  Attention: Richard Truesdell, Esq.

         If to the Trustee:

                  State Street Bank and Trust Company
                  Goodwin Square, 23rd Floor
                  225 Asylum Street
                  Hartford, CT  06103
                  Telecopier No.: (860) 244-1897
                  Attention: Corporate Trust Administration

         With a copy to:

                  Brown Rudnick Freed & Gesmer, P.C.
                  City Place 1
                  Hartford, CT  06103
                  Telecopier No.: (860) 509-6501
                  Attention: James E. Rosenbluth, Esq.

         The Company, any Guarantor or the Trustee, by notice to the others
may designate additional or different addresses for subsequent notices or
communications.


                                      82
<PAGE>


         All notices and communications (other than those sent to Holders)
shall be deemed to have been duly given: at the time delivered by hand, if
personally delivered; five Business Days after being deposited in the mail,
postage prepaid, if mailed; when receipt acknowledged, if telecopied; and the
next Business Day after timely delivery to the courier, if sent by overnight
air courier guaranteeing next day delivery.

         Any notice or communication to a Holder shall be mailed by first
class mail, certified or registered, return receipt requested, or by overnight
air courier guaranteeing next day delivery to its address shown on the
register kept by the Registrar. Any notice or communication shall also be so
mailed to any Person described in TIA ss. 313(c), to the extent required by
the TIA. Failure to mail a notice or communication to a Holder or any defect
in it shall not affect its sufficiency with respect to other Holders.

         If a notice or communication is mailed in the manner provided above
within the time prescribed, it is duly given, whether or not the addressee
receives it.

         If the Company mails a notice or communication to Holders, it shall
mail a copy to the Trustee and each Agent at the same time.

Section 12.03  Communication by Holders of Notes with Other Holders of Notes.

         Holders may communicate pursuant to TIA ss. 312(b) with other Holders
with respect to their rights under this Indenture or the Notes. The Company,
the Trustee, the Registrar and anyone else shall have the protection of TIA
ss. 312(c).

Section 12.04  Certificate and Opinion as to Conditions Precedent.

         Upon any request or application by the Company to the Trustee to take
any action under this Indenture, the Company shall furnish to the Trustee:

         (a) an Officers' Certificate in form and substance reasonably
satisfactory to the Trustee (which shall include the statements set forth in
Section 12.05 hereof) stating that, in the opinion of the signers, all
conditions precedent and covenants, if any, provided for in this Indenture
relating to the proposed action have been satisfied; and

         (b) an Opinion of Counsel in form and substance reasonably
satisfactory to the Trustee (which shall include the statements set forth in
Section 12.05 hereof) stating that, in the opinion of such counsel, all such
conditions precedent and covenants have been satisfied.

Section 12.05  Statements Required in Certificate or Opinion.

         Each certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture (other than a certificate
provided pursuant to TIA ss. 314(a)(4)) shall comply with the provisions of
TIA ss. 314(e) and shall include:

         (a) a statement that the Person making such certificate or opinion
has read such covenant or condition;

         (b) a brief statement as to the nature and scope of the examination
or investigation upon which the statements or opinions contained in such
certificate or opinion are based;


                                      83
<PAGE>


         (c) a statement that, in the opinion of such Person, he or she has
made such examination or investigation as is necessary to enable him to
express an informed opinion as to whether or not such covenant or condition
has been satisfied; and

         (d) a statement as to whether or not, in the opinion of such Person,
such condition or covenant has been satisfied.

Section 12.06     Rules by Trustee and Agents.

         The Trustee may make reasonable rules for action by or at a meeting
of Holders. The Registrar or Paying Agent may make reasonable rules and set
reasonable requirements for its functions.

Section 12.07  No Personal Liability of Directors, Officers, Employees and
               Stockholders.

         No member, director, officer, employee, incorporator or stockholder
of the Company or any Guarantor, as such, shall have any liability for any
obligations of the Company and the Guarantors under the Notes, the Note
Guarantees or this Indenture or for any claim based on, in respect of, or by
reason of, such obligations or their creation. Each Holder of Notes by
accepting a Note waives and releases all such liability. The waiver and
release are part of the consideration for issuance of the Notes.

Section 12.08  Governing Law.

         THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO
CONSTRUE THIS INDENTURE AND THE NOTES WITHOUT GIVING EFFECT TO APPLICABLE
PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS
OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

Section 12.09  No Adverse Interpretation of Other Agreements.

         This Indenture may not be used to interpret any other indenture, loan
or debt agreement of the Company or its Subsidiaries or of any other Person.
Any such indenture, loan or debt agreement may not be used to interpret this
Indenture.

Section 12.10  Successors.

         All agreements of the Company and the Guarantors in this Indenture,
the Notes and the Note Guarantees shall bind their successors. All agreements
of the Trustee in this Indenture shall bind its successors.

Section 12.11  Severability.

         In case any provision in this Indenture or in the Notes shall be
invalid, illegal or unenforceable, the validity, legality and enforceability
of the remaining provisions shall not in any way be affected or impaired
thereby.

Section 12.12  Counterpart Originals.

         The parties may sign any number of copies of this Indenture. Each
signed copy shall be an original, but all of them together represent the same
agreement.


                                      84
<PAGE>


Section 12.13  Table of Contents, Headings, etc.

         The Table of Contents, Cross-Reference Table and Headings of the
Articles and Sections of this Indenture have been inserted for convenience of
reference only, are not to be considered a part of this Indenture and shall in
no way modify or restrict any of the terms or provisions hereof.

                        [Signatures on following page]


                                      85
<PAGE>



                                  SIGNATURES

Dated as of  September  29, 1999

                                        CHARLES RIVER LABORATORIES, INC.


                                        By:_____________________________________
                                           Name:
                                           Title:

                                        SBI HOLDINGS, INC.


                                        By:_____________________________________
                                           Name:
                                           Title:

                                        SIERRA BIOMEDICAL, INC.


                                        By:_____________________________________
                                           Name:
                                           Title:

                                        SIERRA BIOMEDICAL SAN DIEGO, INC.


                                        By:_____________________________________
                                           Name:
                                           Title:



STATE STREET BANK AND TRUST COMPANY,
as Trustee


By:_________________________________
   Name:
   Title:


                                      86


<PAGE>


                                  EXHIBIT A-1
                             (Face of Global Note)

===============================================================================



                                                      CUSIP/CINS ______________

                  13 1/2% Senior Subordinated Notes due 2009


No. __                                                       $
                                                              -----------------

                       CHARLES RIVER LABORATORIES, INC.

promises to pay to _______________, or registered assigns, the principal sum of
____________________________________ Dollars on October 1, 2009.

Interest Payment Dates: October 1 and April 1

Record Dates: September 15 and March 15

Dated: ______


                                        CHARLES RIVER LABORATORIES, INC.


                                        BY:_____________________________________
                                           Name:
                                           Title:

This is one of the Global Notes referred
to in the within-mentioned Indenture:

STATE STREET BANK AND TRUST COMPANY,
  as Trustee


By:_____________________________________
   Name:
   Title:






================================================================================

                                     A1-1

<PAGE>



                                (Back of Note)


       13 1/2% [Series A] [Series B] Senior Subordinated Notes due 2009

[Insert the following if the Note is issued in global form.]

[Unless and until it is exchanged in whole or in part for Notes in definitive
form, this Note may not be transferred except as a whole by the Depositary to
a nominee of the Depositary or by a nominee of the Depositary to the
Depositary or another nominee of the Depositary or by the Depositary or any
such nominee to a successor Depositary or a nominee of such successor
Depositary. Unless this certificate is presented by an authorized
representative of The Depository Trust Company (55 Water Street, New York, New
York) ("DTC"), to the issuer or its agent for registration of transfer,
exchange or payment, and any certificate issued is registered in the name of
Cede & Co. or such other name as may be requested by an authorized
representative of DTC (and any payment is made to Cede & Co. or such other
entity as may be requested by an authorized representative of DTC), ANY
TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY
PERSON IS WRONGFUL in as much as the registered owner hereof, Cede & Co., has
an interest herein.]

[Insert the Private Placement legend, if applicable, pursuant to the provisions
of the Indenture]

         Capitalized terms used herein shall have the meanings assigned to
them in the Indenture referred to below unless otherwise indicated.

         1. INTEREST. Charles River Laboratories, Inc., a Delaware corporation
(the "Company"), promises to pay interest on the principal amount of this Note
at 13 1/2% per annum from September 29, 1999 until maturity and shall pay the
Liquidated Damages payable pursuant to Section 5 of the Registration Rights
Agreement referred to below. Interest on the Notes will accrue at the rate of
13.5% per year; provided that the rate at which interest accrues will increase
to 14.0% per year on August 15, 2000 in the event that the Ratio of
Consolidated Net Debt to Consolidated Cash Flow for the Company as of June 30,
2000 is equal to or greater than 5.00 to 1. The Company will pay interest and
Liquidated Damages semi-annually on October 1 and April 1 of each year, or if
any such day is not a Business Day, on the next succeeding Business Day (each,
an "Interest Payment Date"). Interest on the Notes will accrue from the most
recent date to which interest has been paid or, if no interest has been paid,
from the date of issuance; provided that if there is no existing Default in
the payment of interest, and if this Note is authenticated between a record
date referred to on the face hereof and the next succeeding Interest Payment
Date, interest shall accrue from such next succeeding Interest Payment Date;
and provided further that the first Interest Payment Date shall be April 1,
2000. The Company shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue principal and premium, if any,
from time to time on demand at a rate that is 1% per annum in excess of the
rate then in effect; it shall pay interest (including post-petition interest
in any proceeding under any Bankruptcy Law) on overdue installments of
interest and Liquidated Damages (without regard to any applicable grace
periods) from time to time on demand at the same rate to the extent lawful.
Interest will be computed on the basis of a 360-day year of twelve 30-day
months.

         2. METHOD OF PAYMENT. The Company will pay interest on the Notes
(except defaulted interest) and Liquidated Damages to the Persons who are
registered Holders of Notes at the close of business on the September 15 or
March 15 next preceding the Interest Payment Date, even if such Notes are
cancelled after such record date and on or before such Interest Payment Date,
except as provided in Section 2.12 of the Indenture with respect to defaulted
interest. The Notes will be payable as to principal, premium and Liquidated
Damages, if any, and interest at the office of the Paying Agent and Registrar.


                                      A1-2
<PAGE>


Holders of Notes must surrender their Notes to the Paying Agent to collect
principal payments, and the Company may pay principal and interest and
Liquidated Damages, if any, by check and may mail checks to a Holder's
registered address; provided that all payments with respect to Global Notes
and Definitive Notes, the Holders of which have given wire transfer
instructions to the Company, will be required to be made by wire transfer of
immediately available funds to the accounts specified by the Holders thereof.
Such payment shall be in such coin or currency of the United States of America
as at the time of payment is legal tender for payment of public and private
debts.

         3. PAYING AGENT AND REGISTRAR. Initially, State Street Bank and Trust
Company, the Trustee under the Indenture, will act as Paying Agent and
Registrar. The Company may change any Paying Agent or Registrar without notice
to any Holder. The Company or any of its Subsidiaries may act in any such
capacity.

         4. INDENTURE. The Company issued the Notes under an Indenture dated
as of [September 24], 1999 ("Indenture"), between the Company and the Trustee.
The terms of the Notes include those stated in the Indenture and those made
part of the Indenture by reference to the Trust Indenture Act of 1939, as
amended (15 U.S. Code ss.ss. 77aaa-77bbbb). The Notes are subject to all such
terms, and Holders are referred to the Indenture and such Act for a statement
of such terms. To the extent any provision of this Note conflicts with the
express provisions of the Indenture, the provisions of the Indenture shall
govern and be controlling. The Notes are obligations of the Company initially
limited to $150.0 million in aggregate principal amount. Additional Notes may
be issued pursuant to Sections 2.02 and 4.09 of the Indenture and, if issued,
will be treated as a single class for all purposes under the Indenture.

         5.    OPTIONAL REDEMPTION.

         (a)   Except as provided in subparagraph (b) of this Paragraph 5, the
Notes will not be redeemable at the Company's option prior to October 1, 2004.
Thereafter, the Notes will be subject to redemption at any time at the option
of the Company, in whole or in part, upon not less than 30 nor more than 60
days' notice, in cash at the redemption prices (expressed as percentages of
principal amount) set forth below, plus accrued and unpaid interest and
Liquidated Damages, if any, thereon to the applicable redemption date, if
redeemed during the twelve-month period beginning on October 1 of the years
indicated below:

         Year                                                    Percentage
         ----                                                    ----------
         2004.....................................................106.750%
         2005.....................................................104.500%
         2006.....................................................102.250%
         2007 and thereafter......................................100.000%

         (b)   Notwithstanding the provisions of subparagraph (a) of this
Paragraph 5, on or prior to October 1, 2002, the Company may redeem up to 35%
of the aggregate principal amount of Notes ever issued under the Indenture in
cash at a redemption price of 113.500% of the principal amount thereof, plus
accrued and unpaid interest and Liquidated Damages, if any, thereon to the
redemption date, with the net cash proceeds of one or more Public Equity
Offerings; provided that at least 65% of the aggregate principal amount of
Notes ever issued under the Indenture remains outstanding immediately after
the occurrence of any such redemption; and provided further that such
redemption shall occur within 90 days of the date of the closing of any such
Public Equity Offering.


                                     A1-3
<PAGE>


         (c)   Any redemption pursuant to this subparagraph 5 shall be made
pursuant to the provisions of Section 3.01 through 3.06 of the Indenture.

         6.    MANDATORY REDEMPTION. Except as set forth in paragraph 7 below,
the Company shall not be required to make mandatory redemption payments with
respect to the Notes.

         7.    REPURCHASE AT OPTION OF HOLDER.

         (a)   Upon the occurrence of a Change of Control, each Holder of
Notes will have the right to require the Company to repurchase all or any part
(equal to $1,000 or an integral multiple thereof) of such Holder's Notes
pursuant to the offer described in Section 4.14 of the Indenture (the "Change
of Control Offer") at an offer price in cash equal to 101% of the aggregate
principal amount thereof plus accrued and unpaid interest and Liquidated
Damages thereon, if any, to the date of purchase (the "Change of Control
Payment"). Within 60 days following any Change of Control, the Company will,
or will cause the Trustee to, mail a notice to each Holder describing the
transaction or transactions that constitute the Change of Control and offering
to repurchase Notes on the date specified in such notice, which date shall be
no earlier than 30 days and no later than 60 days from the date such notice is
mailed, pursuant to the procedures required by the Indenture and described in
such notice.

         (b)   Within 365 days after the receipt of any Net Proceeds from
an Asset Sale, the Company or the Restricted Subsidiary, as the case may be,
shall apply the Net Proceeds, at its option (or to the extent the Company is
required to apply the Net Proceeds pursuant to the terms of the New Credit
Facility), to (a) repay or purchase Senior Indebtedness or Pari Passu
Indebtedness of the Company or any Indebtedness of any Restricted Subsidiary,
as the case may be, provided that, if the Company shall so repay or purchase
Pari Passu Indebtedness of the Company; (i) it will equally and ratably reduce
Indebtedness under the Notes if the Notes are then redeemable; or (ii) if the
Notes may not then be redeemed, the Company shall make an offer, in accordance
with the procedures set forth in the Indenture, to all Holders of Notes to
purchase at a purchase price equal to 100% of the principal amount of the
Notes, plus accrued and unpaid interest and Liquidated Damages, if any,
thereon to the date of purchase, the Notes that would otherwise be redeemed;
or (b)(i) an investment in property, the making of a capital expenditure or
the acquisition of assets that are used or useful in a Permitted Business; or
(ii) the acquisition of Capital Stock of any Person primarily engaged in a
Permitted Business if (x) as a result of the acquisition by the Company or any
Restricted Subsidiary thereof, such Person becomes a Restricted Subsidiary; or
(y) the Investment in that Capital Stock is permitted by clause (6) of the
definition of Permitted Investments. Pending the final application of any such
Net Proceeds, the Company may temporarily reduce Indebtedness or otherwise
invest those Net Proceeds in any manner that is not prohibited by this
Indenture. Any Net Proceeds from Asset Sales that are not applied or invested
as provided in the first sentence of this paragraph will be deemed to
constitute "Excess Proceeds." When the aggregate amount of Excess Proceeds
exceeds $10.0 million, the Company will be required to make an offer to all
Holders of Notes (an "Asset Sale Offer") to purchase the maximum principal
amount of Notes that may be purchased out of the Excess Proceeds, at an offer
price in cash in an amount equal to 100% of the principal amount thereof, plus
accrued and unpaid interest and Liquidated Damages, if any, thereon to the
date of purchase, in accordance with the procedures set forth in this
Indenture. To the extent that any Excess Proceeds remain after consummation of
an Asset Sale Offer, the Company may use those Excess Proceeds for any purpose
not otherwise prohibited by this Indenture. If the aggregate principal amount
of Notes surrendered by Holders thereof in connection with an Asset Sale Offer
exceeds the amount of Excess Proceeds, the Trustee shall select the Notes to
be purchased as set forth under Sections 3.02 and 3.03 of the Indenture. Upon
completion of such offer to purchase, the amount of Excess Proceeds shall be
reset at zero. Holders of Notes that are the subject of an offer to purchase
may elect to have such Notes purchased by completing the form entitled "Option
of Holder to Elect Purchase" on the reverse of the Notes.


                                     A1-4
<PAGE>


         8.    NOTICE OF REDEMPTION. Notice of redemption will be mailed at
least 30 days but not more than 60 days before the redemption date to each
Holder whose Notes are to be redeemed at its registered address. Notes in
denominations larger than $1,000 may be redeemed in part but only in whole
multiples of $1,000, unless all of the Notes held by a Holder are to be
redeemed. On and after the redemption date interest ceases to accrue on Notes
or portions thereof called for redemption.

         9.    DENOMINATIONS, TRANSFER, EXCHANGE. The Notes are in
registered form without coupons in denominations of $1,000 and integral
multiples of $1,000. The transfer of Notes may be registered and Notes may be
exchanged as provided in the Indenture. The Registrar and the Trustee may
require a Holder, among other things, to furnish appropriate endorsements and
transfer documents and the Company may require a Holder to pay any taxes and
fees required by law or permitted by the Indenture. The Company need not
exchange or register the transfer of any Note or portion of a Note selected
for redemption, except for the unredeemed portion of any Note being redeemed
in part. Also, the Company need not exchange or register the transfer of any
Notes for a period of 15 days before a selection of Notes to be redeemed or
during the period between a record date and the corresponding Interest Payment
Date.

         10.   PERSONS DEEMED OWNERS.  The registered Holder of a Note may be
treated as its owner for all purposes.

         11.   AMENDMENT, SUPPLEMENT AND WAIVER. Subject to certain
exceptions, the Indenture, the Note Guarantees or the Notes may be amended or
supplemented with the consent of the Holders of at least a majority in
principal amount of the then outstanding Notes (and Additional Notes, if any)
and any existing Default or compliance with any provision of the Indenture,
the Note Guarantees or the Notes may be waived with the consent of the Holders
of a majority in principal amount of the then outstanding Notes (and
Additional Notes, if any). Without the consent of any Holder of a Note, the
Indenture, the Note Guarantees or the Notes may be amended or supplemented to
cure any ambiguity, defect or inconsistency, to provide for uncertificated
Notes in addition to or in place of certificated Notes, to provide for the
assumption of the Company's or Guarantor's obligations to Holders of the Notes
in case of a merger or consolidation, to make any change that would provide
any additional rights or benefits to the Holders of the Notes or that does not
materially adversely affect the legal rights under the Indenture of any such
Holder, to comply with the requirements of the Commission in order to effect
or maintain the qualification of the Indenture under the Trust Indenture Act,
to provide for the Issuance of Additional Notes in accordance with the
limitations set forth in the Indenture, or to allow any Guarantor to execute a
supplemental indenture to the Indenture and/or a Note Guarantee with respect
to the Notes.

         12.   DEFAULTS AND REMEDIES. Each of the following constitutes an
"Event of Default": (a) default for 30 days in the payment when due of
interest on, or Liquidated Damages with respect to, the Notes (whether or not
prohibited by Article 10 of the Indenture); (b) default in payment when due of
the principal of or premium, if any, on the Notes (whether or not prohibited
by Article 10 of the Indenture); (c) failure by the Company or any of its
Restricted Subsidiaries for 30 days after receipt of notice from the Trustee
or Holders of at least 25% in principal amount of the Notes (including
Additional Notes, if any) then outstanding to comply with Sections 4.07, 4.09,
4.10, 4.14 or Article 5 hereof; (d) failure by the Company for 60 days after
notice from the Trustee or the Holders of at least 25% in principal amount of
the Notes then outstanding to comply with any of its other agreements in this
Indenture or the Notes; (e) default under any mortgage, indenture or
instrument under which there may be issued or by which there may be secured or
evidenced any Indebtedness for money borrowed by the Company or any of its
Restricted Subsidiaries (or the payment of which is guaranteed by the Company
or any of its Restricted Subsidiaries), whether such Indebtedness or guarantee
now exists, or is created after the date of this Indenture, which default (i)
is caused by a failure to pay Indebtedness at its stated final maturity (after
giving effect to any applicable grace period provided in such Indebtedness) (a
"Payment Default") or (ii) results in the acceleration of such

                                     A1-5
<PAGE>


Indebtedness prior to its stated final maturity and, in each case, the
principal amount of any such Indebtedness, together with the principal amount
of any other such Indebtedness under which there has been a Payment Default or
the maturity of which has been so accelerated, aggregates $10.0 million or
more; (f) failure by the Company or any of its Restricted Subsidiaries to pay
final judgments aggregating in excess of $10.0 million (net of any amounts
with respect to which a reputable and creditworthy insurance company has
acknowledged liability in writing), which judgments are not paid, discharged
or stayed for a period of 60 days; (g) except as permitted by the Indenture,
if any Note Guarantee shall be held in any judicial proceeding to be
unenforceable or invalid or shall cease for any reason to be in full force and
effect or any Guarantor, or any Person acting on behalf of a Guarantor, shall
deny or disaffirm its obligations under its Note Guarantee; and (h) certain
events of bankruptcy or insolvency as described in the Indenture.

         If any Event of Default (other than certain events of bankruptcy or
insolvency) occurs and is continuing, Holders of at least 25% in principal
amount of the then outstanding Notes may direct the Trustee to declare all the
Notes to be due and payable immediately. However, so long as any Indebtedness
permitted to be incurred pursuant to the New Credit Facility shall be
outstanding, such acceleration shall not be effective until the earlier of (i)
an acceleration under any such Indebtedness under the New Credit Facility; or
(ii) five Business Days after receipt by the Company and the administrative
agent under the New Credit Facility of written notice of such acceleration.
Except as stated in the prior sentence, upon any such declaration, the Notes
shall become due and payable immediately. Notwithstanding the foregoing, in
the case of an Event of Default arising from certain events of bankruptcy or
insolvency, all outstanding Notes will become due and payable without further
action or notice. Holders of the Notes may not enforce the Indenture or the
Notes except as provided in the Indenture. The Holders of a majority in
aggregate principal amount of the then outstanding Notes by written notice to
the Trustee may on behalf of all of the Holders rescind an acceleration and
its consequences if the rescission would not conflict with any judgment or
decree and if all existing Events of Default (except nonpayment of principal
or interest that has become due solely because of the acceleration) have been
cured or waived provided that, in the event of a declaration of acceleration
of the Notes because an Event of Default has occurred and is continuing as a
result of the acceleration of any Indebtedness described in clause (e) of
Section 12 above, the declaration of acceleration of the Notes shall be
automatically annulled if the holders of any Indebtedness described in clause
(e) of Section 12 above have rescinded the declaration of acceleration in
respect of such Indebtedness within 30 days of the date of such declaration
and if (i) the annulment of the acceleration of the Notes would not conflict
with any judgment or decree of a court of competent jurisdiction; and (ii) all
existing Events of Default, except non-payment of principal or interest on the
Notes that became due solely because of the acceleration of the Notes, have
been cured or waived, provided that, in the event of a declaration of
acceleration of the Notes because an Event of Default has occurred and is
continuing as a result of the acceleration of any Indebtedness described in
clause (e) of this Section 12, the declaration of acceleration of the Notes
shall be automatically annulled if the holders of any Indebtedness described
in clause (e) of this Section 12 have rescinded the declaration of
acceleration in respect of such Indebtedness within 30 days of the date of
such declaration and if (i) the annulment of the acceleration of the Notes
would not conflict with any judgment or decree of a court of competent
jurisdiction and (ii) all existing Events of Default, except non-payment of
principal or interest on the Notes that became due solely because of the
acceleration of the Notes, have been cured or waived. The Company is required
to deliver to the Trustee annually a statement regarding compliance with the
Indenture, and the Company is required upon becoming aware of any Default or
Event of Default to deliver to the Trustee a statement specifying such Default
or Event of Default.

         13.   SUBORDINATION. The payment of Subordinated Note Obligations
will be subordinated in right of payment, as set forth in the Indenture, to
the prior payment in full in cash or cash equivalents of all Senior
Indebtedness, whether outstanding on the date of the Indenture or thereafter
incurred. the Company agrees, and each Holder by accepting a Note agrees, that
the payment of principal of, premium


                                     A1-6
<PAGE>


and interest and Liquidated Damages, if any, on the Notes is subordinated in
right of payment, to the extent and in the manner provided in the Indenture,
to the prior payment in full in cash or cash equivalents of all Senior
Indebtedness (whether outstanding on the date hereof or thereafter created,
incurred, assumed or guaranteed), and that the subordination is for the
benefit of the holders of Senior Indebtedness.

         14.   TRUSTEE DEALINGS WITH COMPANY. The Trustee, in its
individual or any other capacity, may make loans to, accept deposits from, and
perform services for the Company or its Affiliates, and may otherwise deal
with the Company or its Affiliates, as if it were not the Trustee.

         15.   NO RECOURSE AGAINST OTHERS. No member, director, officer,
employee, incorporator or stockholder, of the Company or any Guarantor, as
such, shall have any liability for any obligations of the Company and the
Guarantors under the Notes, the Note Guarantees or the Indenture or for any
claim based on, in respect of, or by reason of, such obligations or their
creation. Each Holder by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for the
issuance of the Notes.

         16.   AUTHENTICATION. This Note shall not be valid until authenticated
by the manual signature of the Trustee or an authenticating agent.

         17.   ABBREVIATIONS. Customary abbreviations may be used in the
name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN
ENT (= tenants by the entireties), JT TEN (= joint tenants with right of
survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (=
Uniform Gifts to Minors Act).

         18.   ADDITIONAL RIGHTS OF HOLDERS OF RESTRICTED GLOBAL NOTES AND
RESTRICTED DEFINITIVE NOTES. In addition to the rights provided to Holders of
Notes under the Indenture, Holders of Restricted Global Notes and Restricted
Definitive Notes shall have all the rights set forth in the Registration
Rights Agreement dated as of September 29, 1999, between the Company and the
parties named on the signature pages thereof (the "Registration Rights
Agreement").

         19.   CUSIP NUMBERS. Pursuant to a recommendation promulgated by
the Committee on Uniform Security Identification Procedures, the Company has
caused CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP
numbers in notices of redemption as a convenience to Holders. No
representation is made as to the accuracy of such numbers either as printed on
the Notes or as contained in any notice of redemption and reliance may be
placed only on the other identification numbers placed thereon.

         The Company will furnish to any Holder upon written request and
without charge a copy of the Indenture and/or the Registration Rights
Agreement. Requests may be made to:

                  Charles River Laboratories, Inc.
                  251 Ballardvale Street
                  Wilmington, MA 01887
                  Telecopier No.: 978-988-5665
                  Attention: General Counsel



                                     A1-7
<PAGE>



                                ASSIGNMENT FORM

To assign this Note, fill in the form below:

(I) or (we) assign and transfer this Note to:

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
(Insert assignee's soc. sec. or tax I.D. no.)

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
(Print or type assignee's name, address and zip code)

and irrevocably appoint_________________________________________________________
to transfer this Note on the books of the Company. The agent may substitute
another to act for him.

Date:                            Your Signature:_______________________________
                                 (Sign exactly as your name appears on the Note)


                                 Tax Identification No:





Signature Guarantee:____________________________


                                     A1-8
<PAGE>



                      OPTION OF HOLDER TO ELECT PURCHASE

         If you want to elect to have this Note purchased by the Company
pursuant to Section 4.10 or 4.14 of the  Indenture, check the box below:

               [ ] Section 4.10         [ ] Section 4.14

         If you want to elect to have only part of the Note purchased by the
Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state the
amount you elect to have purchased: $________


Date:                            Your Signature:________________________________
                                 (Sign exactly as your name appears on the Note)


                                 Tax Identification No:
                                                       -------------------------



Signature Guarantee:_______________________


                                     A1-9
<PAGE>



            SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE1

         The following exchanges of a part of this Global Note for an interest
in another Global Note or for a Definitive Note, or exchanges of a part of
another Global Note or Definitive Note for an interest in this Global Note,
have been made:

<TABLE>


                                                                                       Principal Amount
                                 Amount of decrease       Amount of increase in         of this Global             Signature of
                                 in Principal Amount         Principal Amount         Note following such       authorized officer
                                       of this                   of this                   decrease             of Trustee or Note
     Date of Exchange                Global Note               Global Note               (or increase)               Custodian
     ----------------            -------------------      ---------------------       -------------------       ------------------
<S>                              <C>                      <C>                         <C>                       <C>







</TABLE>


____________
1 This should be included only if the Note is issued in global form.


                                    A1-10
<PAGE>




                                  EXHIBIT A-2
                 (Face of Regulation S Temporary Global Note)

===============================================================================

                                                         CUSIP/CINS ___________

                  13 1/2% Senior Subordinated Notes due 2009


No.__                                                         $
                                                              -----------------

                       CHARLES RIVER LABORATORIES, INC.

promises to pay to _________________, oe registered assigns, the principal sum
of ______________ Dollars on October 1, 2009.

Interest Payment Dates:  October 1 and April 1

Record Dates:            September 15 and March 15

Dated:


                                        CHARLES RIVER LABORATORIES, INC.


                                        BY:_____________________________________
                                           Name:
                                           Title:

This is one of the Global Notes referred
to in the within-mentioned Indenture:

STATE STREET BANK AND TRUST COMPANY,
  as Trustee


By:_____________________________________
   Name:
   Title:




================================================================================


                                     A2-1
<PAGE>





                 (Back of Regulation S Temporary Global Note)

       13 1/2% [Series A] [Series B] Senior Subordinated Notes due 2009

THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL NOTE, AND THE
CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE FOR CERTIFICATED NOTES, ARE
AS SPECIFIED IN THE INDENTURE (AS DEFINED HEREIN). NEITHER THE HOLDER NOR THE
BENEFICIAL OWNERS OF THIS REGULATION S TEMPORARY GLOBAL NOTE SHALL BE ENTITLED
TO RECEIVE PAYMENT OF INTEREST HEREON.

"THE SECURITY (OR ITS PREDECESSOR) EVIDENCED HEREBY WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER SECTION 5 OF THE UNITED STATES
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND THE SECURITY
EVIDENCED HEREBY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE
ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH
PURCHASER OF THE SECURITY EVIDENCED HEREBY IS HEREBY NOTIFIED THAT THE SELLER
MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE
SECURITIES ACT PROVIDED BY RULE 144A OR REGULATION S THEREUNDER. THE HOLDER OF
THE SECURITY EVIDENCED HEREBY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A)
SUCH SECURITY MAY BE RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (1)(a)
INSIDE THE UNITED STATES TO A PERSON WHO THE SELLER REASONABLY BELIEVES IS A
QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES
ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (b) IN A
TRANSACTION MEETING THE REQUIREMENTS OF RULE 144 UNDER THE SECURITIES ACT, (c)
OUTSIDE THE UNITED STATES TO A FOREIGN PERSON IN A TRANSACTION MEETING THE
REQUIREMENTS OF RULE 904 UNDER THE SECURITIES ACT, (d) TO AN INSTITUTIONAL
"ACCREDITED INVESTOR" AS DEFINED IN RULE 501(A)(1), (2), (3) OR (7) OF THE
SECURITIES ACT (AN "INSTITUTIONAL ACCREDITED INVESTOR") THAT, PRIOR TO SUCH
TRANSFER, FURNISHES THE TRUSTEE A SIGNED LETTER CONTAINING CERTAIN
REPRESENTATIONS AND AGREEMENTS (THE FORM OF WHICH CAN BE OBTAINED FROM THE
TRUSTEE) AND, IF SUCH TRANSFER IS IN RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT
OF SECURITIES LESS THAN $250,000, AN OPINION OF COUNSEL THAT SUCH TRANSFER IS
IN COMPLIANCE WITH THE SECURITIES ACT OR (e) IN ACCORDANCE WITH ANOTHER
EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND BASED
UPON AN OPINION OF COUNSEL IF THE COMPANY SO REQUESTS), (2) TO THE COMPANY OR
(3) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT AND, IN EACH CASE, IN
ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED
STATES OR ANY OTHER APPLICABLE JURISDICTION AND (B) THE HOLDER WILL, AND EACH
SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER FROM IT OF THE SECURITY
EVIDENCED HEREBY OF THE RESALE RESTRICTIONS SET FORTH IN (A) ABOVE."

         Capitalized terms used herein shall have the meanings assigned to
them in the Indenture referred to below unless otherwise indicated.

         1.    INTEREST. Charles River Laboratories, Inc., a Delaware
corporation (the "Company"), promises to pay interest on the principal amount
of this Note at 13 1/2% per annum from September 29, 1999 until maturity and
shall pay the Liquidated Damages payable pursuant to Section 5 of the
Registration Rights Agreement referred to below. Interest on the Notes will
accrue at the rate of 13.5% per year; provided that the rate at which interest
accrues will increase to 14.0% per year on August 15,

                                     A2-2
<PAGE>


2000 in the event that the Ratio of Consolidated Net Debt to Consolidated Cash
Flow for the Company as of June 30, 2000 is equal to or greater than 5.00 to
1. The Company will pay interest and Liquidated Damages semi-annually on
October 1 and April 1 of each year, or if any such day is not a Business Day,
on the next succeeding Business Day (each, an "Interest Payment Date").
Interest on the Notes will accrue from the most recent date to which interest
has been paid or, if no interest has been paid, from the date of issuance;
provided that if there is no existing Default in the payment of interest, and
if this Note is authenticated between a record date referred to on the face
hereof and the next succeeding Interest Payment Date, interest shall accrue
from such next succeeding Interest Payment Date; and provided further that the
first Interest Payment Date shall be April 1, 2000. The Company shall pay
interest (including post-petition interest in any proceeding under any
Bankruptcy Law) on overdue principal and premium, if any, from time to time on
demand at a rate that is 1% per annum in excess of the rate then in effect; it
shall pay interest (including post-petition interest in any proceeding under
any Bankruptcy Law) on overdue installments of interest and Liquidated Damages
(without regard to any applicable grace periods) from time to time on demand
at the same rate to the extent lawful. Interest will be computed on the basis
of a 360-day year of twelve 30-day months.

         2.    METHOD OF PAYMENT. The Company will pay interest on the
Notes (except defaulted interest) and Liquidated Damages to the Persons who
are registered Holders of Notes at the close of business on the September 15
or March 15 next preceding the Interest Payment Date, even if such Notes are
cancelled after such record date and on or before such Interest Payment Date,
except as provided in Section 2.12 of the Indenture with respect to defaulted
interest. The Notes will be payable as to principal, premium and Liquidated
Damages, if any, and interest at the office of the Paying Agent and Registrar.
Holders of Notes must surrender their Notes to the Paying Agent to collect
principal payments, and the Company may pay principal and interest and
Liquidated Damages, if any, by check and may mail checks to a Holder's
registered address; provided that all payments with respect to Global Notes
and Definitive Notes, the Holders of which have given wire transfer
instructions to the Company, will be required to be made by wire transfer of
immediately available funds to the accounts specified by the Holders thereof.
Such payment shall be in such coin or currency of the United States of America
as at the time of payment is legal tender for payment of public and private
debts.

         3.    PAYING AGENT AND REGISTRAR. Initially, State Street Bank and
Trust Company, the Trustee under the Indenture, will act as Paying Agent and
Registrar. The Company may change any Paying Agent or Registrar without notice
to any Holder. The Company or any of its Subsidiaries may act in any such
capacity.

         4.    INDENTURE. The Company issued the Notes under an Indenture
dated as of [September 24], 1999 ("Indenture"), between the Company and the
Trustee. The terms of the Notes include those stated in the Indenture and
those made part of the Indenture by reference to the Trust Indenture Act of
1939, as amended (15 U.S. Code ss.ss. 77aaa-77bbbb). The Notes are subject to
all such terms, and Holders are referred to the Indenture and such Act for a
statement of such terms. To the extent any provision of this Note conflicts
with the express provisions of the Indenture, the provisions of the Indenture
shall govern and be controlling. The Notes are obligations of the Company
initially limited to $150.0 million in aggregate principal amount. Additional
Notes may be issued pursuant to Sections 2.02 and 4.09 of the Indenture and,
if issued, will be treated as a single class for all purposes under the
Indenture.

         5.    OPTIONAL REDEMPTION.

         (a)   Except as provided in subparagraph (b) of this Paragraph 5,
the Notes will not be redeemable at the Company's option prior to October 1,
2004. Thereafter, the Notes will be subject to redemption at any time at the
option of the Company, in whole or in part, upon not less than 30 nor more


                                     A2-3
<PAGE>


than 60 days' notice, in cash at the redemption prices (expressed as
percentages of principal amount) set forth below, plus accrued and unpaid
interest and Liquidated Damages, if any, thereon to the applicable redemption
date, if redeemed during the twelve-month period beginning on October 1 of the
years indicated below:

         Year                                                        Percentage
         ----                                                        ----------
         2004.........................................................106.750%
         2005.........................................................104.500%
         2006.........................................................102.250%
         2007 and thereafter..........................................100.000%

         (b)......Notwithstanding the provisions of subparagraph (a) of this
Paragraph 5, on or prior to October 1, 2002, the Company may redeem up to 35%
of the aggregate principal amount of Notes ever issued under the Indenture in
cash at a redemption price of 113.500% of the principal amount thereof, plus
accrued and unpaid interest and Liquidated Damages, if any, thereon to the
redemption date, with the net cash proceeds of one or more Public Equity
Offerings; provided that at least 65% of the aggregate principal amount of
Notes ever issued under the Indenture remains outstanding immediately after
the occurrence of any such redemption; and provided further that such
redemption shall occur within 90 days of the date of the closing of any such
Public Equity Offering.

         (c)   Any redemption pursuant to this subparagraph 5 shall be made
pursuant to the provisions of Section 3.01 through 3.06 of the Indenture.

         6.    MANDATORY REDEMPTION. Except as set forth in paragraph 7 below,
the Company shall not be required to make mandatory redemption payments with
respect to the Notes.

         7.    REPURCHASE AT OPTION OF HOLDER.

         (a)   Upon the occurrence of a Change of Control, each Holder of
Notes will have the right to require the Company to repurchase all or any part
(equal to $1,000 or an integral multiple thereof) of such Holder's Notes
pursuant to the offer described in Section 4.14 of the Indenture (the "Change
of Control Offer") at an offer price in cash equal to 101% of the aggregate
principal amount thereof plus accrued and unpaid interest and Liquidated
Damages thereon, if any, to the date of purchase (the "Change of Control
Payment"). Within 60 days following any Change of Control, the Company will,
or will cause the Trustee to, mail a notice to each Holder describing the
transaction or transactions that constitute the Change of Control and offering
to repurchase Notes on the date specified in such notice, which date shall be
no earlier than 30 days and no later than 60 days from the date such notice is
mailed, pursuant to the procedures required by the Indenture and described in
such notice.

         (b).  Within 365 days after the receipt of any Net Proceeds from
an Asset Sale, the Company or the Restricted Subsidiary, as the case may be,
shall apply the Net Proceeds, at its option (or to the extent the Company is
required to apply the Net Proceeds pursuant to the terms of the New Credit
Facility), to (a) repay or purchase Senior Indebtedness or Pari Passu
Indebtedness of the Company or any Indebtedness of any Restricted Subsidiary,
as the case may be, provided that, if the Company shall so repay or purchase
Pari Passu Indebtedness of the Company; (i) it will equally and ratably reduce
Indebtedness under the Notes if the Notes are then redeemable; or (ii) if the
Notes may not then be redeemed, the Company shall make an offer, in accordance
with the procedures set forth in the Indenture, to all Holders of Notes to
purchase at a purchase price equal to 100% of the principal amount of the
Notes, plus accrued and unpaid interest and Liquidated Damages, if any,
thereon to the date of purchase, the Notes that would otherwise be redeemed;


                                     A2-4
<PAGE>


or (b)(i) an investment in property, the making of a capital expenditure or
the acquisition of assets that are used or useful in a Permitted Business; or
(ii) the acquisition of Capital Stock of any Person primarily engaged in a
Permitted Business if (x) as a result of the acquisition by the Company or any
Restricted Subsidiary thereof, such Person becomes a Restricted Subsidiary; or
(y) the Investment in that Capital Stock is permitted by clause (6) of the
definition of Permitted Investments. Pending the final application of any such
Net Proceeds, the Company may temporarily reduce Indebtedness or otherwise
invest those Net Proceeds in any manner that is not prohibited by this
Indenture. Any Net Proceeds from Asset Sales that are not applied or invested
as provided in the first sentence of this paragraph will be deemed to
constitute "Excess Proceeds." When the aggregate amount of Excess Proceeds
exceeds $10.0 million, the Company will be required to make an offer to all
Holders of Notes (an "Asset Sale Offer") to purchase the maximum principal
amount of Notes that may be purchased out of the Excess Proceeds, at an offer
price in cash in an amount equal to 100% of the principal amount thereof, plus
accrued and unpaid interest and Liquidated Damages, if any, thereon to the
date of purchase, in accordance with the procedures set forth in this
Indenture. To the extent that any Excess Proceeds remain after consummation of
an Asset Sale Offer, the Company may use those Excess Proceeds for any purpose
not otherwise prohibited by this Indenture. If the aggregate principal amount
of Notes surrendered by Holders thereof in connection with an Asset Sale Offer
exceeds the amount of Excess Proceeds, the Trustee shall select the Notes to
be purchased as set forth under Sections 3.02 and 3.03 of the Indenture. Upon
completion of such offer to purchase, the amount of Excess Proceeds shall be
reset at zero. Holders of Notes that are the subject of an offer to purchase
may elect to have such Notes purchased by completing the form entitled "Option
of Holder to Elect Purchase" on the reverse of the Notes.

         8.    NOTICE OF REDEMPTION. Notice of redemption will be mailed at
least 30 days but not more than 60 days before the redemption date to each
Holder whose Notes are to be redeemed at its registered address. Notes in
denominations larger than $1,000 may be redeemed in part but only in whole
multiples of $1,000, unless all of the Notes held by a Holder are to be
redeemed. On and after the redemption date interest ceases to accrue on Notes
or portions thereof called for redemption.

         9.    DENOMINATIONS, TRANSFER, EXCHANGE. The Notes are in
registered form without coupons in denominations of $1,000 and integral
multiples of $1,000. The transfer of Notes may be registered and Notes may be
exchanged as provided in the Indenture. The Registrar and the Trustee may
require a Holder, among other things, to furnish appropriate endorsements and
transfer documents and the Company may require a Holder to pay any taxes and
fees required by law or permitted by the Indenture. The Company need not
exchange or register the transfer of any Note or portion of a Note selected
for redemption, except for the unredeemed portion of any Note being redeemed
in part. Also, the Company need not exchange or register the transfer of any
Notes for a period of 15 days before a selection of Notes to be redeemed or
during the period between a record date and the corresponding Interest Payment
Date.

         10.  PERSONS DEEMED OWNERS. The registered Holder of a Note may be
treated as its owner for all purposes.

         11.   AMENDMENT, SUPPLEMENT AND WAIVER. Subject to certain
exceptions, the Indenture, the Note Guarantees or the Notes may be amended or
supplemented with the consent of the Holders of at least a majority in
principal amount of the then outstanding Notes (and Additional Notes, if any)
and any existing Default or compliance with any provision of the Indenture,
the Note Guarantees or the Notes may be waived with the consent of the Holders
of a majority in principal amount of the then outstanding Notes (and
Additional Notes, if any). Without the consent of any Holder of a Note, the
Indenture, the Note Guarantees or the Notes may be amended or supplemented to
cure any ambiguity, defect or inconsistency, to provide for uncertificated
Notes in addition to or in place of certificated Notes, to provide for the
assumption of the Company's or Guarantor's obligations to Holders of the Notes
in case of a merger or

                                     A2-5
<PAGE>


consolidation, to make any change that would provide any additional
rights or benefits to the Holders of the Notes or that does not materially
adversely affect the legal rights under the Indenture of any such Holder, to
comply with the requirements of the Commission in order to effect or maintain
the qualification of the Indenture under the Trust Indenture Act, to provide
for the Issuance of Additional Notes in accordance with the limitations set
forth in the Indenture, or to allow any Guarantor to execute a supplemental
indenture to the Indenture and/or a Note Guarantee with respect to the Notes.

         12.   DEFAULTS AND REMEDIES. Each of the following constitutes an
"Event of Default": (a) default for 30 days in the payment when due of
interest on, or Liquidated Damages with respect to, the Notes (whether or not
prohibited by Article 10 of the Indenture); (b) default in payment when due of
the principal of or premium, if any, on the Notes (whether or not prohibited
by Article 10 of the Indenture); (c) failure by the Company or any of its
Restricted Subsidiaries for 30 days after receipt of notice from the Trustee
or Holders of at least 25% in principal amount of the Notes (including
Additional Notes, if any) then outstanding to comply with Sections 4.07, 4.09,
4.10, 4.14 or Article 5 hereof; (d) failure by the Company for 60 days after
notice from the Trustee or the Holders of at least 25% in principal amount of
the Notes then outstanding to comply with any of its other agreements in this
Indenture or the Notes; (e) default under any mortgage, indenture or
instrument under which there may be issued or by which there may be secured or
evidenced any Indebtedness for money borrowed by the Company or any of its
Restricted Subsidiaries (or the payment of which is guaranteed by the Company
or any of its Restricted Subsidiaries), whether such Indebtedness or guarantee
now exists, or is created after the date of this Indenture, which default (i)
is caused by a failure to pay Indebtedness at its stated final maturity (after
giving effect to any applicable grace period provided in such Indebtedness) (a
"Payment Default") or (ii) results in the acceleration of such Indebtedness
prior to its stated final maturity and, in each case, the principal amount of
any such Indebtedness, together with the principal amount of any other such
Indebtedness under which there has been a Payment Default or the maturity of
which has been so accelerated, aggregates $10.0 million or more; (f) failure
by the Company or any of its Restricted Subsidiaries to pay final judgments
aggregating in excess of $10.0 million (net of any amounts with respect to
which a reputable and creditworthy insurance company has acknowledged
liability in writing), which judgments are not paid, discharged or stayed for
a period of 60 days; (g) except as permitted by the Indenture, if any Note
Guarantee shall be held in any judicial proceeding to be unenforceable or
invalid or shall cease for any reason to be in full force and effect or any
Guarantor, or any Person acting on behalf of a Guarantor, shall deny or
disaffirm its obligations under its Note Guarantee; and (h) certain events of
bankruptcy or insolvency as described in the Indenture.

         If any Event of Default (other than certain events of bankruptcy or
insolvency) occurs and is continuing, Holders of at least 25% in principal
amount of the then outstanding Notes may direct the Trustee to declare all the
Notes to be due and payable immediately. However, so long as any Indebtedness
permitted to be incurred pursuant to the New Credit Facility shall be
outstanding, such acceleration shall not be effective until the earlier of (i)
an acceleration under any such Indebtedness under the New Credit Facility; or
(ii) five Business Days after receipt by the Company and the administrative
agent under the New Credit Facility of written notice of such acceleration.
Except as stated in the prior sentence, upon any such declaration, the Notes
shall become due and payable immediately. Notwithstanding the foregoing, in
the case of an Event of Default arising from certain events of bankruptcy or
insolvency, all outstanding Notes will become due and payable without further
action or notice. Holders of the Notes may not enforce the Indenture or the
Notes except as provided in the Indenture. The Holders of a majority in
aggregate principal amount of the then outstanding Notes by written notice to
the Trustee may on behalf of all of the Holders rescind an acceleration and
its consequences if the rescission would not conflict with any judgment or
decree and if all existing Events of Default (except nonpayment of principal
or interest that has become due solely because of the acceleration) have been
cured or waived provided that, in the event of a declaration of acceleration
of the Notes because an Event of Default has occurred and is continuing as a
result of the acceleration of any

                                     A2-6
<PAGE>



Indebtedness described in clause (e) of Section 12 above, the declaration of
acceleration of the Notes shall be automatically annulled if the holders of
any Indebtedness described in clause (e) of Section 12 above have rescinded
the declaration of acceleration in respect of such Indebtedness within 30 days
of the date of such declaration and if (i) the annulment of the acceleration
of the Notes would not conflict with any judgment or decree of a court of
competent jurisdiction; and (ii) all existing Events of Default, except
non-payment of principal or interest on the Notes that became due solely
because of the acceleration of the Notes, have been cured or waived, provided
that, in the event of a declaration of acceleration of the Notes because an
Event of Default has occurred and is continuing as a result of the
acceleration of any Indebtedness described in clause (e) of this Section 12,
the declaration of acceleration of the Notes shall be automatically annulled
if the holders of any Indebtedness described in clause (e) of this Section 12
have rescinded the declaration of acceleration in respect of such Indebtedness
within 30 days of the date of such declaration and if (i) the annulment of the
acceleration of the Notes would not conflict with any judgment or decree of a
court of competent jurisdiction and (ii) all existing Events of Default,
except non-payment of principal or interest on the Notes that became due
solely because of the acceleration of the Notes, have been cured or waived.
The Company is required to deliver to the Trustee annually a statement
regarding compliance with the Indenture, and the Company is required upon
becoming aware of any Default or Event of Default to deliver to the Trustee a
statement specifying such Default or Event of Default.

         13.   SUBORDINATION. The payment of Subordinated Note Obligations
will be subordinated in right of payment, as set forth in the Indenture, to
the prior payment in full in cash or cash equivalents of all Senior
Indebtedness, whether outstanding on the date of the Indenture or thereafter
incurred. the Company agrees, and each Holder by accepting a Note agrees, that
the payment of principal of, premium and interest and Liquidated Damages, if
any, on the Notes is subordinated in right of payment, to the extent and in
the manner provided in the Indenture, to the prior payment in full in cash or
cash equivalents of all Senior Indebtedness (whether outstanding on the date
hereof or thereafter created, incurred, assumed or guaranteed), and that the
subordination is for the benefit of the holders of Senior Indebtedness.

         14.   TRUSTEE DEALINGS WITH COMPANY. The Trustee, in its
individual or any other capacity, may make loans to, accept deposits from, and
perform services for the Company or its Affiliates, and may otherwise deal
with the Company or its Affiliates, as if it were not the Trustee.

         15.   NO RECOURSE AGAINST OTHERS. No member, director, officer,
employee, incorporator or stockholder, of the Company or any Guarantor, as
such, shall have any liability for any obligations of the Company and the
Guarantors under the Notes, the Note Guarantees or the Indenture or for any
claim based on, in respect of, or by reason of, such obligations or their
creation. Each Holder by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for the
issuance of the Notes.

         16. AUTHENTICATION. This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

         17.   ABBREVIATIONS. Customary abbreviations may be used in the
name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN
ENT (= tenants by the entireties), JT TEN (= joint tenants with right of
survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (=
Uniform Gifts to Minors Act).

         18.   ADDITIONAL RIGHTS OF HOLDERS OF RESTRICTED GLOBAL NOTES AND
RESTRICTED DEFINITIVE NOTES. In addition to the rights provided to Holders of
Notes under the Indenture, Holders of Restricted Global Notes and Restricted
Definitive Notes shall have all the rights set forth in the

                                     A2-7
<PAGE>


Registration Rights Agreement dated as of September 29, 1999, between the
Company and the parties named on the signature pages thereof (the
"Registration Rights Agreement").

         19.   CUSIP NUMBERS. Pursuant to a recommendation promulgated by
the Committee on Uniform Security Identification Procedures, the Company has
caused CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP
numbers in notices of redemption as a convenience to Holders. No
representation is made as to the accuracy of such numbers either as printed on
the Notes or as contained in any notice of redemption and reliance may be
placed only on the other identification numbers placed thereon.

         The Company will furnish to any Holder upon written request and
without charge a copy of the Indenture and/or the Registration Rights
Agreement. Requests may be made to:

                  Charles River Laboratories, Inc.
                  251 Ballardvale Street
                  Wilmington, MA 01887
                  Telecopier No.: 978-988-5665
                  Attention: General Counsel



                                     A2-8
<PAGE>


                                ASSIGNMENT FORM

To assign this Note, fill in the form below:

(I) or (we) assign and transfer this Note to:

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
 (Insert assignee's soc. sec. or tax I.D. no.)

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
(Print or type assignee's name, address and zip code)

and irrevocably appoint ______________________________ to transfer this Note on
the books of the Company. The agent may substitute another to act for him.

Date:                            Your Signature:________________________________
                                 (Sign exactly as your name appears on the Note)


                                 Tax Identification No:_________________________





Signature Guarantee:____________________________



                                     A2-9
<PAGE>


                      OPTION OF HOLDER TO ELECT PURCHASE

         If you want to elect to have this Note purchased by the Company
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

         [ ] Section 4.10                  [ ] Section 4.14

         If you want to elect to have only part of the Note purchased by the
Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state the
amount you elect to have purchased: $________


Date:                            Your Signature:________________________________
                                 (Sign exactly as your name appears on the Note)


                                 Tax Identification No:_________________________




Signature Guarantee:_______________________


                                    A2-10
<PAGE>



          SCHEDULE OF EXCHANGES OF REGULATION S TEMPORARY GLOBAL NOTE

         The following exchanges of a part of this Regulation S Temporary
Global Note for an interest in another Global Note, or of other Restricted
Global Notes for an interest in this Regulation S Temporary Global Note, have
been made:

<TABLE>

                                                                                       Principal Amount
                                 Amount of decrease       Amount of increase in         of this Global             Signature of
                                 in Principal Amount         Principal Amount         Note following such       authorized officer
                                       of this                   of this                   decrease             of Trustee or Note
     Date of Exchange               Global Note               Global Note               (or increase)               Custodian
     ----------------            -------------------      ---------------------       -------------------       ------------------
<S>                              <C>                      <C>                         <C>                       <C>




</TABLE>



                                    A2-11
<PAGE>




                                   EXHIBIT B
                        FORM OF CERTIFICATE OF TRANSFER

Charles River Laboratories, Inc.
251 Ballardvale Street
Wilmington, MA 01887
Telecopier No.: 978-988-5665
Attention: General Counsel


State Street Bank and Trust Company
2 Avenue de Lafayette
Boston, MA  02111
Telecopier No.: (617) 662-1452
Attention: Corporate Trust Department, Transfer Unit


Re:      13 1/2% Senior Subordinated Notes due 2009

         Reference is hereby made to the Indenture, dated as of September 29,
1999 (the "Indenture"), among Charles River Laboratories, Inc. (the
"Company"), as issuer, the Guarantors listed on the signature pages thereto,
and State Street Bank and Trust Company, as trustee. Capitalized terms used
but not defined herein shall have the meanings given to them in the Indenture.

         ______________, (the "Transferor") owns and proposes to transfer the
Note[s] or interest in such Note[s] specified in Annex A hereto, in the
principal amount of $___________ in such Note[s] or interests (the
"Transfer"), to __________ (the "Transferee"), as further specified in Annex A
hereto. In connection with the Transfer, the Transferor hereby certifies that:

[CHECK ALL THAT APPLY]

1. [  ] Check if Transferee will take delivery of a beneficial interest in the
144A Global Note or a Definitive Note Pursuant to Rule 144A. The Transfer is
being effected pursuant to and in accordance with Rule 144A under the United
States Securities Act of 1933, as amended (the "Securities Act"), and,
accordingly, the Transferor hereby further certifies that the beneficial
interest or Definitive Note is being transferred to a Person that the
Transferor reasonably believed and believes is purchasing the beneficial
interest or Definitive Note for its own account, or for one or more accounts
with respect to which such Person exercises sole investment discretion, and
such Person and each such account is a "qualified institutional buyer" within
the meaning of Rule 144A in a transaction meeting the requirements of Rule
144A and such Transfer is in compliance with any applicable blue sky
securities laws of any state of the United States. Upon consummation of the
proposed Transfer in accordance with the terms of the Indenture, the
transferred beneficial interest or Definitive Note will be subject to the
restrictions on transfer enumerated in the Private Placement Legend printed on
the 144A Global Note and/or the Definitive Note and in the Indenture and the
Securities Act.

2. [  ] Check if Transferee will take delivery of a beneficial interest in the
Regulation S Temporary Global Note, the Regulation S Global Note or a
Definitive Note pursuant to Regulation S. The Transfer is being effected
pursuant to and in accordance with Rule 903 or Rule 904 under the Securities
Act and, accordingly, the Transferor hereby further certifies that (i) the
Transfer is not being

                                     B-1
<PAGE>


made to a Person in the United States and (x) at the time the buy order was
originated, the Transferee was outside the United States or such Transferor
and any Person acting on its behalf reasonably believed and believes that the
Transferee was outside the United States or (y) the transaction was executed
in, on or through the facilities of a designated offshore securities market
and neither such Transferor nor any Person acting on its behalf knows that the
transaction was prearranged with a buyer in the United States, (ii) no
directed selling efforts have been made in contravention of the requirements
of Rule 903(b) or Rule 904(b) of Regulation S under the Securities Act and
(iii) the transaction is not part of a plan or scheme to evade the
registration requirements of the Securities Act. Upon consummation of the
proposed transfer in accordance with the terms of the Indenture, the
transferred beneficial interest or Definitive Note will be subject to the
restrictions on Transfer enumerated in the Private Placement Legend printed on
the Regulation S Global Note, the Regulation S Temporary Global Note and/or
the Definitive Note and in the Indenture and the Securities Act.

3. [  ] Check and complete if Transferee will take delivery of a beneficial
interest in the IAI Global Note or a Definitive Note pursuant to any provision
of the Securities Act other than Rule 144A or Regulation S. The Transfer is
being effected in compliance with the transfer restrictions applicable to
beneficial interests in Restricted Global Notes and Restricted Definitive
Notes and pursuant to and in accordance with the Securities Act and any
applicable blue sky securities laws of any state of the United States, and
accordingly the Transferor hereby further certifies that (check one):

     (a) [ ]   such Transfer is being effected pursuant to and in accordance
         with Rule 144 under the Securities Act;
                                      or

     (b) [ ]   such Transfer is being effected to the Company or a subsidiary
         thereof;
                                      or

     (c) [ ]   such Transfer is being effected pursuant to an effective
         registration statement under the Securities Act and in compliance
         with the prospectus delivery requirements of the Securities Act;
                                      or

     (d) [ ]   such Transfer is being effected to an Institutional Accredited
         Investor and pursuant to an exemption from the registration
         requirements of the Securities Act other than Rule 144A, Rule 144 or
         Rule 904, and the Transferor hereby further certifies that it has not
         engaged in any general solicitation within the meaning of Regulation
         D under the Securities Act and the Transfer complies with the
         transfer restrictions applicable to beneficial interests in a
         Restricted Global Note or Restricted Definitive Notes and the
         requirements of the exemption claimed, which certification is
         supported by (1) a certificate executed by the Transferee in the form
         of Exhibit D to the Indenture and (2) if such Transfer is in respect
         of a principal amount of Notes at the time of transfer of less than
         $250,000, an Opinion of Counsel provided by the Transferor or the
         Transferee (a copy of which the Transferor has attached to this
         certification), to the effect that such Transfer is in compliance
         with the Securities Act. Upon consummation of the proposed transfer
         in accordance with the terms of the Indenture, the transferred
         beneficial interest or Definitive Note will be subject to the
         restrictions on transfer enumerated in the Private Placement Legend
         printed on the IAI Global Note and/or the Definitive Notes and in the
         Indenture and the Securities Act.

4. [  ]  Check if Transferee will take delivery of a beneficial interest in an
Unrestricted Global Note or of an Unrestricted Definitive Note.


                                     B-2
<PAGE>


         (a)   [ ] Check if Transfer is pursuant to Rule 144. (i) The Transfer
is being effected pursuant to and in accordance with Rule 144 under the
Securities Act and in compliance with the transfer restrictions contained in
the Indenture and any applicable blue sky securities laws of any state of the
United States and (ii) the restrictions on transfer contained in the Indenture
and the Private Placement Legend are not required in order to maintain
compliance with the Securities Act. Upon consummation of the proposed Transfer
in accordance with the terms of the Indenture, the transferred beneficial
interest or Definitive Note will no longer be subject to the restrictions on
transfer enumerated in the Private Placement Legend printed on the Restricted
Global Notes, on Restricted Definitive Notes and in the Indenture.

         (b)   [ ] Check if Transfer is Pursuant to Regulation S. (i) The
Transfer is being effected pursuant to and in accordance with Rule 903 or Rule
904 under the Securities Act and in compliance with the transfer restrictions
contained in the Indenture and any applicable blue sky securities laws of any
state of the United States and (ii) the restrictions on transfer contained in
the Indenture and the Private Placement Legend are not required in order to
maintain compliance with the Securities Act. Upon consummation of the proposed
Transfer in accordance with the terms of the Indenture, the transferred
beneficial interest or Definitive Note will no longer be subject to the
restrictions on transfer enumerated in the Private Placement Legend printed on
the Restricted Global Notes, on Restricted Definitive Notes and in the
Indenture.

         (c)   [ ] Check if Transfer is Pursuant to Other Exemption. (i) The
Transfer is being effected pursuant to and in compliance with an exemption
from the registration requirements of the Securities Act other than Rule 144,
Rule 903 or Rule 904 and in compliance with the transfer restrictions
contained in the Indenture and any applicable blue sky securities laws of any
state of the United States and (ii) the restrictions on transfer contained in
the Indenture and the Private Placement Legend are not required in order to
maintain compliance with the Securities Act. Upon consummation of the proposed
Transfer in accordance with the terms of the Indenture, the transferred
beneficial interest or Definitive Note will not be subject to the restrictions
on transfer enumerated in the Private Placement Legend printed on the
Restricted Global Notes or Restricted Definitive Notes and in the Indenture.

         This certificate and the statements contained herein are made for
your benefit and the benefit of the Company.

                                            ------------------------------------
                                                  [Insert Name of Transferor]

                                              BY:_______________________________
                                                  Name:
                                                  Title:
Dated:   __________, ____


                                     B-3
<PAGE>


                      ANNEX A TO CERTIFICATE OF TRANSFER

1.       The Transferor owns and proposes to transfer the following:

                           [CHECK ONE OF (a) OR (b)]

     (a) [ ]   a beneficial interest in the:

                  (i)    [ ] 144A Global Note (CUSIP _________), or

                 (ii)    [ ] Regulation S Global Note (CUSIP __________), or

                (iii)    [ ] IAI Global Note (CUSIP __________), or

     (b) [ ]   a Restricted Definitive Note.


2.       After the Transfer the Transferee will hold:

                                  [CHECK ONE]

     (a) [ ]  a beneficial interest in the:

                  (i)    [ ] 144A Global Note (CUSIP __________), or (ii)

                 (ii)    [ ] Regulation S Global Note (CUSIP __________), or

                (iii)    [ ] IAI Global Note (CUSIP __________), or (iv)

                 (iv)    [ ] Unrestricted Global Note (CUSIP __________), or

     (b) [ ]   a Restricted Definitive Note, or

     (c) [ ]   an Unrestricted Definitive Note,

         in accordance with the terms of the Indenture.


                                     B-4
<PAGE>


                                   EXHIBIT C
                        FORM OF CERTIFICATE OF EXCHANGE

Charles River Laboratories, Inc.
251 Ballardvale Street
Wilmington, MA 01887
Telecopier No.: 978-988-5665
Attention: General Counsel


State Street Bank and Trust Company
2 Avenue de Lafayette
Boston, MA  02111
Telecopier No.: (617) 662-1452
Attention: Corporate Trust Department, Transfer Unit

Re:      13 1/2% Senior Subordinated Notes Due 2009


         Reference is hereby made to the Indenture, dated as of September 29,
1999 (the "Indenture"), among Charles River Laboratories, Inc. (the
"Company"), as issuer, the Guarantors listed on the signature pages thereto,
and State Street Bank and Trust Company, as trustee. Capitalized terms used
but not defined herein shall have the meanings given to them in the Indenture.

         ____________, (the "Owner") owns and proposes to exchange the Note[s]
or interest in such Note[s] specified herein, in the principal amount of
$____________ in such Note[s] or interests (the "Exchange"). In connection
with the Exchange, the Owner hereby certifies that:

1.       Exchange of Restricted Definitive Notes or Beneficial Interests in a
Restricted Global Note for Unrestricted Definitive Notes or Beneficial
Interests in an Unrestricted Global Note

         (a) [ ] Check if Exchange is from beneficial interest in a Restricted
Global Note to beneficial interest in an Unrestricted Global Note. In
connection with the Exchange of the Owner's beneficial interest in a
Restricted Global Note for a beneficial interest in an Unrestricted Global
Note in an equal principal amount, the Owner hereby certifies (i) the
beneficial interest is being acquired for the Owner's own account without
transfer, (ii) such Exchange has been effected in compliance with the transfer
restrictions applicable to the Global Notes and pursuant to and in accordance
with the United States Securities Act of 1933, as amended (the "Securities
Act"), (iii) the restrictions on transfer contained in the Indenture and the
Private Placement Legend are not required in order to maintain compliance with
the Securities Act and (iv) the beneficial interest in an Unrestricted Global
Note is being acquired in compliance with any applicable blue sky securities
laws of any state of the United States.

         (b) [ ] Check if Exchange is from beneficial interest in a Restricted
Global Note to Unrestricted Definitive Note. In connection with the Exchange
of the Owner's beneficial interest in a Restricted Global Note for an
Unrestricted Definitive Note, the Owner hereby certifies (i) the Definitive
Note is being acquired for the Owner's own account without transfer, (ii) such
Exchange has been effected in compliance with the transfer restrictions
applicable to the Restricted Global Notes and pursuant to and in accordance
with the Securities Act, (iii) the restrictions on transfer contained in the
Indenture and the Private Placement Legend are not required in order to
maintain compliance with the

                                     C-1
<PAGE>


Securities Act and (iv) the Definitive Note is being acquired in compliance
with any applicable blue sky securities laws of any state of the United
States.

         (c) [ ] Check if Exchange is from Restricted Definitive Note to
beneficial interest in an Unrestricted Global Note. In connection with the
Owner's Exchange of a Restricted Definitive Note for a beneficial interest in
an Unrestricted Global Note, the Owner hereby certifies (i) the beneficial
interest is being acquired for the Owner's own account without transfer, (ii)
such Exchange has been effected in compliance with the transfer restrictions
applicable to Restricted Definitive Notes and pursuant to and in accordance
with the Securities Act, (iii) the restrictions on transfer contained in the
Indenture and the Private Placement Legend are not required in order to
maintain compliance with the Securities Act and (iv) the beneficial interest
is being acquired in compliance with any applicable blue sky securities laws
of any state of the United States.

         (d) [ ] Check if Exchange is from Restricted Definitive Note to
Unrestricted Definitive Note. In connection with the Owner's Exchange of a
Restricted Definitive Note for an Unrestricted Definitive Note, the Owner
hereby certifies (i) the Unrestricted Definitive Note is being acquired for
the Owner's own account without transfer, (ii) such Exchange has been effected
in compliance with the transfer restrictions applicable to Restricted
Definitive Notes and pursuant to and in accordance with the Securities Act,
(iii) the restrictions on transfer contained in the Indenture and the Private
Placement Legend are not required in order to maintain compliance with the
Securities Act and (iv) the Unrestricted Definitive Note is being acquired in
compliance with any applicable blue sky securities laws of any state of the
United States.

2.       Exchange of Restricted Definitive Notes or Beneficial Interests in
Restricted Global Notes for Restricted Definitive Notes or Beneficial
Interests in Restricted Global Notes

         (a) [ ] Check if Exchange is from beneficial interest in a Restricted
Global Note to Restricted Definitive Note. In connection with the Exchange of
the Owner's beneficial interest in a Restricted Global Note for a Restricted
Definitive Note with an equal principal amount, the Owner hereby certifies
that the Restricted Definitive Note is being acquired for the Owner's own
account without transfer. Upon consummation of the proposed Exchange in
accordance with the terms of the Indenture, the Restricted Definitive Note
issued will continue to be subject to the restrictions on transfer enumerated
in the Private Placement Legend printed on the Restricted Definitive Note and
in the Indenture and the Securities Act.

         (b) [ ] Check if Exchange is from Restricted Definitive Note to
beneficial interest in a Restricted Global Note. In connection with the
Exchange of the Owner's Restricted Definitive Note for a beneficial interest
in the [CHECK ONE] [GRAPHIC OMITTED] "144A Global Note", [GRAPHIC OMITTED]
"Regulation S Global Note", [GRAPHIC OMITTED] "IAI Global Note" with an equal
principal amount, the Owner hereby certifies (i) the beneficial interest is
being acquired for the Owner's own account without transfer and (ii) such
Exchange has been effected in compliance with the transfer restrictions
applicable to the Restricted Global Notes and pursuant to and in accordance
with the Securities Act, and in compliance with any applicable blue sky
securities laws of any state of the United States. Upon consummation of the
proposed Exchange in accordance with the terms of the Indenture, the
beneficial interest issued will be subject to the restrictions on transfer
enumerated in the Private Placement Legend printed on the relevant Restricted
Global Note and in the Indenture and the Securities Act.


                                     C-2
<PAGE>


         This certificate and the statements contained herein are made for
your benefit and the benefit of the Company.


                                         --------------------------------------
                                                  [Insert Name of Owner]

                                            By:________________________________
                                               Name:
                                               Title:
Dated:   __________, ____



                                     C-3
<PAGE>


                                   EXHIBIT D
                           FORM OF CERTIFICATE FROM
                  ACQUIRING INSTITUTIONAL ACCREDITED INVESTOR

Charles River Laboratories, Inc.
251 Ballardvale Street
Wilmington, MA 01887
Telecopier No.: 978-988-5665
Attention: General Counsel


State Street Bank and Trust Company
2 Avenue de Lafayette
Boston, MA  02111
Telecopier No.: (617) 662-1452
Attention: Corporate Trust Department, Transfer Unit

Re:           13 1/2% Senior Subordinated Notes due 2009


         Reference is hereby made to the Indenture, dated as of September 29,
1999 (the "Indenture"), among Charles River Laboratories, Inc. (the
"Company"), as issuer, the Guarantors listed on the signature pages thereto,
and State Street Bank and Trust Company, as trustee. Capitalized terms used
but not defined herein shall have the meanings given to them in the Indenture.


              In connection with our proposed purchase of $____________
aggregate principal amount of:

         (a)   [ ] a beneficial interest in a Global Note, or

         (b)   [ ] a Definitive Note,

         we confirm that:

     1.  We understand that any subsequent transfer of the Notes or any
         interest therein is subject to certain restrictions and conditions
         set forth in the Indenture and the undersigned agrees to be bound by,
         and not to resell, pledge or otherwise transfer the Notes or any
         interest therein except in compliance with, such restrictions and
         conditions and the United States Securities Act of 1933, as amended
         (the "Securities Act").

     2.  We understand  that the offer and sale of the Notes have not been
         registered under the Securities Act, and that the Notes and any
         interest therein may not be offered or sold except as permitted in
         the following sentence. We agree, on our own behalf and on behalf of
         any accounts for which we are acting as hereinafter stated, that if
         we should sell the Notes or any interest therein, we will do so only
         (A) to the Company or any subsidiary thereof, (B) in accordance with
         Rule 144A under the Securities Act to a "qualified institutional
         buyer" (as defined therein), (C) to an institutional "accredited
         investor" (as defined below) that, prior to such transfer, furnishes
         (or has furnished on its behalf by a U.S. broker-dealer) to you and
         to the Company a signed letter substantially in the


                                     D-1
<PAGE>

         form of this letter and, if such transfer is in respect of a
         principal amount of Notes, at the time of transfer of less than
         $250,000, an Opinion of Counsel in form reasonably acceptable to the
         Company to the effect that such transfer is in compliance with the
         Securities Act, (D) outside the United States in accordance with Rule
         904 of Regulation S under the Securities Act, (E) pursuant to the
         provisions of Rule 144(k) under the Securities Act or (F) pursuant to
         an effective registration statement under the Securities Act, and we
         further agree to provide to any person purchasing the Definitive Note
         or beneficial interest in a Global Note from us in a transaction
         meeting the requirements of clauses (A) through (E) of this paragraph
         a notice advising such purchaser that resales thereof are restricted
         as stated herein.

     3.  We understand that, on any proposed resale of the Notes or beneficial
         interest therein, we will be required to furnish to you and the
         Company such certifications, legal opinions and other information as
         you and the Company may reasonably require to confirm that the
         proposed sale complies with the foregoing restrictions. We further
         understand that the Notes purchased by us will bear a legend to the
         foregoing effect. We further understand that any subsequent transfer
         by us of the Notes or beneficial interest therein acquired by us must
         be effected through one of the Placement Agents.

     4.  We are an institutional "accredited investor" (as defined in Rule
         501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act)
         and have such knowledge and experience in financial and business
         matters as to be capable of evaluating the merits and risks of our
         investment in the Notes, and we and any accounts for which we are
         acting are each able to bear the economic risk of our or its
         investment.

     5.  We are acquiring the Notes or beneficial interest therein purchased
         by us for our own account or for one or more accounts (each of which
         is an institutional "accredited investor") as to each of which we
         exercise sole investment discretion.


         You and the Company are entitled to rely upon this letter and are
         irrevocably authorized to produce this letter or a copy hereof to any
         interested party in any administrative or legal proceedings or
         official inquiry with respect to the matters covered hereby.

                                        ---------------------------------------
                                        [Insert Name of Accredited Investor]


                                        By: _______________________________
                                            Name:
                                            Title:

Dated: __________________, ____



                                     D-2
<PAGE>


                                   EXHIBIT E

                         FORM OF NOTATION OF GUARANTEE

         For value received, each Guarantor (which term includes any successor
Person under the Indenture) has, jointly and severally, unconditionally
guaranteed, to the extent set forth in the Indenture and subject to the
provisions in the Indenture dated as of [September 24], 1999 (the "Indenture")
among Charles River Laboratories, Inc., the Guarantors listed on Schedule I
thereto and State Street Bank and Trust Company, as trustee (the "Trustee"),
(a) the due and punctual payment of the principal of, premium, if any, and
interest on the Notes (as defined in the Indenture), whether at maturity, by
acceleration, redemption or otherwise, the due and punctual payment of
interest on overdue principal and premium, and, to the extent permitted by
law, interest, and the due and punctual performance of all other obligations
of the Company to the Holders or the Trustee all in accordance with the terms
of the Indenture and (b) in case of any extension of time of payment or
renewal of any Notes or any of such other obligations, that the same will be
promptly paid in full when due or performed in accordance with the terms of
the extension or renewal, whether at stated maturity, by acceleration or
otherwise. The obligations of the Guarantors to the Holders of Notes and to
the Trustee pursuant to the Note Guarantee and the Indenture are expressly set
forth in Article 11 of the Indenture and reference is hereby made to the
Indenture for the precise terms of the Note Guarantee. Each Holder of a Note,
by accepting the same, (a) agrees to and shall be bound by such provisions,
(b) authorizes and directs the Trustee, on behalf of such Holder, to take such
action as may be necessary or appropriate to effectuate the subordination as
provided in the Indenture and (c) appoints the Trustee attorney-in-fact of
such Holder for such purpose; provided, however, that the Indebtedness
evidenced by this Note Guarantee shall cease to be so subordinated and subject
in right of payment upon any defeasance of this Note in accordance with the
provisions of the Indenture.

                                           [NAME OF GUARANTOR(S)]


                                            By:_________________________________
                                                 Name:
                                                 Title:





                                     E-1


<PAGE>




                                   EXHIBIT F

                        FORM OF SUPPLEMENTAL INDENTURE
                   TO BE DELIVERED BY SUBSEQUENT GUARANTORS

         SUPPLEMENTAL INDENTURE (this "Supplemental Indenture"), dated as of [
___, 1999] among [__________________] (the "Guaranteeing Subsidiary"), a
subsidiary of Charles River Laboratories, Inc. (or its permitted successor), a
Delaware corporation (the "Company"), the Company, the other Guarantors (as
defined in the Indenture referred to herein) and State Street Bank and Trust
Company, as trustee under the indenture referred to below (the "Trustee").

W I T N E S S E T H

         WHEREAS, the Company has heretofore executed and delivered to the
Trustee an indenture (the "Indenture"), dated as of September 29, 1999
providing for the issuance of an aggregate principal amount of up to $150.0
million of 13 1/2% Senior Subordinated Notes due 2009 (the "Notes");

         WHEREAS, the Indenture provides that under certain circumstances the
Guaranteeing Subsidiary shall execute and deliver to the Trustee a
supplemental indenture pursuant to which the Guaranteeing Subsidiary shall
unconditionally guarantee all of the Company's Obligations under the Notes and
the Indenture on the terms and conditions set forth herein (the "Note
Guarantee"); and

         WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is
authorized to execute and deliver this Supplemental Indenture.

         NOW THEREFORE, in consideration of the foregoing and for other good
and valuable consideration, the receipt of which is hereby acknowledged, the
Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the
equal and ratable benefit of the Holders of the Notes as follows:

         1.    CAPITALIZED TERMS. Capitalized terms used herein without
definition shall have the meanings assigned to them in the Indenture.

         2.    AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees
as follows:

         (a) Along with all Guarantors named in the Indenture, to jointly and
         severally Guarantee to each Holder of a Note authenticated and
         delivered by the Trustee and to the Trustee and its successors and
         assigns, the Notes or the obligations of the Company hereunder or
         thereunder, that:

                  (i)    the principal of and interest on the Notes will be
                         promptly paid in full when due, whether at
                         maturity, by acceleration, redemption or otherwise,
                         and interest on the overdue principal of and
                         interest on the Notes, if any, if lawful, and all
                         other obligations of the Company to the Holders or
                         the Trustee hereunder or thereunder will be
                         promptly paid in full or performed, all in
                         accordance with the terms hereof and thereof; and

                 (ii)    in case of any extension of time of payment or
                         renewal of any Notes or any of such other
                         obligations, that same will be promptly paid in
                         full when due or performed in accordance with the
                         terms of the extension or renewal, whether at
                         stated maturity, by acceleration or otherwise.
                         Failing payment when due of any

                                     F-1
<PAGE>

                         amount so guaranteed or any performance so guaranteed
                         for whatever reason, the Guarantors shall be jointly
                         and severally obligated to pay the same immediately.

         (b) The obligations hereunder shall be unconditional, irrespective of
         the validity, regularity or enforceability of the Notes or the
         Indenture, the absence of any action to enforce the same, any waiver
         or consent by any Holder of the Notes with respect to any provisions
         hereof or thereof, the recovery of any judgment against the Company,
         any action to enforce the same or any other circumstance which might
         otherwise constitute a legal or equitable discharge or defense of a
         guarantor.

         (c) The following is hereby waived: diligence presentment, demand of
         payment, filing of claims with a court in the event of insolvency or
         bankruptcy of the Company, any right to require a proceeding first
         against the Company, protest, notice and all demands whatsoever.

         (d) This Note Guarantee shall not be discharged except by complete
         performance of the obligations contained in the Notes and the
         Indenture, and the Guaranteeing Subsidiary accepts all obligations of
         a Guarantor under the Indenture.

         (e) If any Holder or the Trustee is required by any court or
         otherwise to return to the Company, the Guarantors, or any Custodian,
         Trustee, liquidator or other similar official acting in relation to
         either the Company or the Guarantors, any amount paid by either to
         the Trustee or such Holder, this Note Guarantee, to the extent
         theretofore discharged, shall be reinstated in full force and effect.

         (f) The Guaranteeing Subsidiary shall not be entitled to any right of
         subrogation in relation to the Holders in respect of any obligations
         guaranteed hereby until payment in full of all obligations guaranteed
         hereby.

         (g) As between the Guarantors, on the one hand, and the Holders and
         the Trustee, on the other hand, (x) the maturity of the obligations
         guaranteed hereby may be accelerated as provided in Article 6 of the
         Indenture for the purposes of this Note Guarantee, notwithstanding
         any stay, injunction or other prohibition preventing such
         acceleration in respect of the obligations guaranteed hereby, and (y)
         in the event of any declaration of acceleration of such obligations
         as provided in Article 6 of the Indenture, such obligations (whether
         or not due and payable) shall forthwith become due and payable by the
         Guarantors for the purpose of this Note Guarantee.

         (h) The Guarantors shall have the right to seek contribution from any
         non-paying Guarantor so long as the exercise of such right does not
         impair the rights of the Holders under the Guarantee.

         (i) Pursuant to Section 11.03 of the Indenture, after giving effect
         to any maximum amount and any other contingent and fixed liabilities
         that are relevant under any applicable Bankruptcy or fraudulent
         conveyance laws, and after giving effect to any collections from,
         rights to receive contribution from or payments made by or on behalf
         of any other Guarantor in respect of the obligations of such other
         Guarantor under Article 11 of the Indenture, this new Note Guarantee
         shall be limited to the maximum amount permissible such that the
         obligations of such Guarantor under this Note Guarantee will not
         constitute a fraudulent transfer or conveyance.


                                     F-2
<PAGE>


         3.    EXECUTION AND DELIVERY. Each Guaranteeing Subsidiary agrees that
the Note Guarantees shall remain in full force and effect notwithstanding any
failure to endorse on each Note a notation of such Note Guarantee.

         4.    GUARANTEEING SUBSIDIARY MAY CONSOLIDATE, ETC. ON CERTAIN TERMS.

         (a) The Guaranteeing Subsidiary may not consolidate with or merge
with or into (whether or not such Guarantor is the surviving Person) another
corporation, Person or entity whether or not affiliated with such Guarantor
unless:

         (i) subject to Sections 11.05 and 11.06 of the Indenture, the Person
         formed by or surviving any such consolidation or merger (if other
         than a Guarantor or the Company) unconditionally assumes all the
         obligations of such Guarantor, pursuant to a supplemental indenture
         in form and substance reasonably satisfactory to the Trustee, under
         the Notes, the Indenture and the Note Guarantee on the terms set
         forth herein or therein; and

         (ii) immediately after giving effect to such transaction, no Default
         or Event of Default exists.

         (b) In case of any such consolidation, merger, sale or conveyance and
upon the assumption by the successor corporation, by supplemental indenture,
executed and delivered to the Trustee and satisfactory in form to the Trustee,
of the Note Guarantee endorsed upon the Notes and the due and punctual
performance of all of the covenants and conditions of the Indenture to be
performed by the Guarantor, such successor corporation shall succeed to and be
substituted for the Guarantor with the same effect as if it had been named
herein as a Guarantor. Such successor corporation thereupon may cause to be
signed any or all of the Note Guarantees to be endorsed upon all of the Notes
issuable hereunder which theretofore shall not have been signed by the Company
and delivered to the Trustee. All the Note Guarantees so issued shall in all
respects have the same legal rank and benefit under the Indenture as the Note
Guarantees theretofore and thereafter issued in accordance with the terms of
the Indenture as though all of such Note Guarantees had been issued at the
date of the execution hereof.

         (c) Except as set forth in Articles 4 and 5 and Section 11.06 of
Article 11 of the Indenture, and notwithstanding clauses (a) and (b) above,
nothing contained in the Indenture or in any of the Notes shall prevent any
consolidation or merger of a Guarantor with or into the Company or another
Guarantor, or shall prevent any sale or conveyance of the property of a
Guarantor as an entirety or substantially as an entirety to the Company or
another Guarantor.

         5.    RELEASES.

         (a) In the event of a sale or other disposition of all of the assets
of any Guarantor, by way of merger, consolidation or otherwise, or a sale or
other disposition of all to the capital stock of any Guarantor, in each case
to a Person that is not (either before or after giving effect to such
transaction) a Restricted Subsidiary of the Company, then such Guarantor (in
the event of a sale or other disposition, by way of merger, consolidation or
otherwise, of all of the capital stock of such Guarantor) or the corporation
acquiring the property (in the event of a sale or other disposition of all or
substantially all of the assets of such Guarantor) will be released and
relieved of any obligations under its Note Guarantee; provided that the Net
Proceeds of such sale or other disposition are applied in accordance with the
applicable provisions of the Indenture, including without limitation Section
4.10 of the Indenture. Upon delivery by the Company to the Trustee of an
Officers' Certificate and an Opinion of Counsel to the effect that such sale
or other disposition was made by the Company in accordance with the provisions
of the Indenture, including without limitation Section 4.10 of the Indenture,
the Trustee shall execute any

                                     F-3
<PAGE>


documents reasonably required in order to evidence the release of any
Guarantor from its obligations under its Note Guarantee.

         (b) Any Guarantor not released from its obligations under its Note
Guarantee shall remain liable for the full amount of principal of and interest
on the Notes and for the other obligations of any Guarantor under the
Indenture as provided in Article 11 of the Indenture.

         6.    NO RECOURSE AGAINST OTHERS. No past, present or future member,
director, officer, employee, incorporator, stockholder or agent of the
Guaranteeing Subsidiary, as such, shall have any liability for any obligations
of the Company or any Guaranteeing Subsidiary under the Notes, any Note
Guarantees, the Indenture or this Supplemental Indenture or for any claim
based on, in respect of, or by reason of, such obligations or their creation.
Each Holder of the Notes by accepting a Note waives and releases all such
liability. The waiver and release are part of the consideration for issuance
of the Notes. Such waiver may not be effective to waive liabilities under the
federal securities laws and it is the view of the SEC that such a waiver is
against public policy.

         7.    NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK
SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE BUT WITHOUT
GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT
THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

         8.    COUNTERPARTS. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

         9.    EFFECT OF HEADINGS.  The Section headings herein are for
convenience only and shall not affect the construction hereof.

         10. THE TRUSTEE. The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this
Supplemental Indenture or for or in respect of the recitals contained herein,
all of which recitals are made solely by the Guaranteeing Subsidiary and the
Company.


                                     F-4
<PAGE>


         IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed and attested, all as of the date first above
written.

Dated:  _______________, ____
                                     [GUARANTEEING SUBSIDIARY]


                                     By:________________________________________
                                          Name:
                                          Title:


                                     SBI HOLDINGS, INC.


                                     By:________________________________________
                                          Name:
                                          Title:

                                     SIERRA BIOMEDICAL, INC.


                                     By:________________________________________
                                          Name:
                                          Title:

                                     SIERRA BIOMEDICAL SAN DIEGO, INC.


                                     By:________________________________________
                                          Name:
                                          Title:



                                     STATE STREET BANK AND TRUST COMPANY,
                                       as Trustee


                                     By:________________________________________
                                          Name:
                                          Title:



                                     F-5
<PAGE>



                                  Schedule I
                            SCHEDULE OF GUARANTORS

         The following schedule lists each Guarantor under the Indenture as of
the Issue Date:

         SBI Holdings, Inc.
         Sierra Biomedical, Inc.
         Sierra Biomedical San Diego, Inc.



                                     F-6




                             DAVIS POLK & WARDWELL
                              450 LEXINGTON AVENUE
                            NEW YORK, NEW YORK 10017

                                  212-450-4000

                                                     November 30, 1999

Charles River Laboratories, Inc.
251 Ballardvale Street
Wilmington, MA 01887
Ladies and Gentlemen:

         We have acted as counsel for Charles River Laboratories, Inc., a
Delaware corporation (the "Company"), in connection with the Company's offer
(the "Exchange Offer") to exchange its 13 1/2% Series B Senior Subordinated
Notes due 2009 (the "New Notes") for any and all of its outstanding 13 1/2%
Series A Senior Subordinated Notes due 2009 (the "Old Notes").

         We have examined originals or copies, certified or otherwise identified
to our satisfaction, of such documents, corporate records, certificates of
public officials and other instruments as we have deemed necessary for the
purposes of rendering this opinion. We have assumed the capacity of all natural
persons and the genuineness of all signatures.

         Based upon the foregoing, we are of the opinion that, assuming the New
Notes have been duly authorized by the Company, when executed and authenticated
in accordance with the Exchange Offer, the New Notes will be valid and binding
obligations of the Company, enforceable against the Company in accordance with
their terms, except (x) as such enforcement may be limited by bankruptcy,
insolvency, fraudulent conveyance, or similar laws affecting creditors' rights
generally, (y) as such enforcement is subject to general principles of equity
(regardless of whether such enforceability is considered in a proceeding in
equity or at law) and (z) to the extent that a waiver of rights under any usury
or stay law may be unenforceable; we express no opinion, however, as to the
applicability (and, if applicable, the effect) of Section 548 of the United
States Bankruptcy Code or any comparable provision of state law to the questions
addressed above or on the conclusions expressed with respect thereto.

<PAGE>



         We are members of the Bar of the State of New York and the foregoing
opinion is limited to the laws of the State of New York, the federal laws of the
United States of America and the General Corporation Law of the State of
Delaware.

         We hereby consent to the filing of this opinion as an exhibit to the
registration statement relating to the Exchange Offer. We also consent to the
reference to us under the caption "Legal Matters" in the prospectus contained in
such registration statement.

                                            Very truly yours,

                                            /s/ Davis Polk & Wardwell


                                                                   Exhibit 10.3

                                                               [EXECUTION COPY]





                               U.S. $190,000,000

                               CREDIT AGREEMENT,

                         dated as of September 29, 1999

                                     among

                       CHARLES RIVER LABORATORIES, INC.,
                                as the Borrower,

                        VARIOUS FINANCIAL INSTITUTIONS,
                                as the Lenders,

                        UNION BANK OF CALIFORNIA, N.A.,
                          as the Administrative Agent
                                for the Lenders,

                           DLJ CAPITAL FUNDING, INC.,
                            as the Syndication Agent
                                for the Lenders,

                                      and

                              NATIONAL CITY BANK,
                           as the Documentation Agent
                                for the Lenders.






                                 LEAD ARRANGER:


                           DLJ CAPITAL FUNDING, INC.




<PAGE>


                               TABLE OF CONTENTS

Section                                                                     Page
- -------                                                                     ----

                                   ARTICLE I

                        DEFINITIONS AND ACCOUNTING TERMS

1.1.    Defined Terms.........................................................4
1.2.    Use of Defined Terms.................................................37
1.3.    Cross-References.....................................................37
1.4.    Accounting and Financial Determinations..............................37

                                   ARTICLE II

                COMMITMENTS, BORROWING AND ISSUANCE PROCEDURES,
                          NOTES AND LETTERS OF CREDIT

2.1.    Commitments..........................................................38
2.1.1.  Term Loan Commitments................................................38
2.1.2.  Revolving Loan Commitment and Swing Line Loan Commitment.............39
2.1.3.  Letter of Credit Commitment..........................................40
2.1.4.  Lenders Not Permitted or Required to Make the Loans..................40
2.1.5.  Issuer Not Permitted or Required to Issue Letters of Credit..........41
2.2.    Reduction of Revolving Loan Commitment Amount........................41
2.3.    Borrowing Procedures and Funding Maintenance.........................41
2.3.1.  Term Loans and Revolving Loans.......................................41
2.3.2.  Swing Line Loans.....................................................42
2.4.    Continuation and Conversion Elections................................43
2.5.    Funding..............................................................43
2.6.    Issuance Procedures..................................................44
2.6.1.  Other Lenders' Participation.........................................45
2.6.2.  Disbursements; Conversion to Revolving Loans.........................45
2.6.3.  Reimbursement........................................................46
2.6.4.  Deemed Disbursements.................................................46
2.6.5.  Nature of Reimbursement Obligations..................................47
2.7.    Register; Notes......................................................48





                                      -ii-

<PAGE>


                                  ARTICLE III

                   REPAYMENTS, PREPAYMENTS, INTEREST AND FEES

3.1.    Repayments and Prepayments; Application..............................49
3.1.1.  Repayments and Prepayments...........................................49
3.1.2.  Application..........................................................54
3.2.    Interest Provisions..................................................54
3.2.1.  Rates................................................................54
3.2.2.  Post-Maturity Rates..................................................55
3.2.3.  Payment Dates........................................................55
3.3.    Fees.................................................................55
3.3.1.  Commitment Fee.......................................................56
3.3.2.  Administrative Agent Fee.............................................56
3.3.3.  Letter of Credit Fee.................................................56

                                   ARTICLE IV

                     CERTAIN LIBO RATE AND OTHER PROVISIONS

4.1.    LIBO Rate Lending Unlawful...........................................56
4.2.    Deposits Unavailable.................................................57
4.3.    Increased LIBO Rate Loan Costs, etc..................................57
4.4.    Funding Losses.......................................................57
4.5.    Increased Capital Costs..............................................58
4.6.    Taxes................................................................58
4.7.    Payments, Computations, etc..........................................61
4.8.    Sharing of Payments..................................................61
4.9.    Setoff...............................................................62
4.10.   Mitigation...........................................................62
4.11.   Replacement of Lenders...............................................63

                                   ARTICLE V

                        CONDITIONS TO CREDIT EXTENSIONS

5.1.    Initial Credit Extension.............................................63
5.1.1.  Resolutions, etc.....................................................63
5.1.2.  Transaction Documents................................................64
5.1.3.  Consummation of Recapitalization and Merger..........................64




                                     -iii-

<PAGE>


5.1.4.  Closing Date Certificate.............................................64
5.1.5.  Delivery of Notes....................................................64
5.1.6.  Subsidiary Guaranty..................................................64
5.1.7.  Pledge and Security Agreements, etc..................................64
5.1.8.  UCC Filing Service...................................................66
5.1.9.  Financial Information, etc...........................................66
5.1.10. Solvency, etc........................................................67
5.1.11. Equity Contributions, Subordinated Debt Issuance, Discount
            Debentures Issuance, Seller Note Issuance and Subco Dividend.....67
5.1.12. Ownership of Holdco..................................................67
5.1.13. Litigation...........................................................67
5.1.14. Material Adverse Effect..............................................67
5.1.15. Reliance Letters.....................................................67
5.1.16. Opinions of Counsel..................................................68
5.1.17. Insurance............................................................68
5.1.18. Closing Fees, Expenses, etc..........................................68
5.1.19. Satisfactory Legal Form..............................................68
5.2.    All Credit Extensions................................................68
5.2.1.  Compliance with Warranties, No Default, etc..........................68
5.2.2.  Credit Extension Request.............................................69

                                   ARTICLE VI

                         REPRESENTATIONS AND WARRANTIES

6.1.    Organization, etc....................................................69
6.2.    Due Authorization, NonContravention, etc.............................70
6.3.    Government Approval, Regulation, etc.................................70
6.4.    Validity, etc........................................................70
6.5.    Financial Information................................................71
6.6.    No Material Adverse Change...........................................71
6.7.    Litigation, etc......................................................71
6.8.    Subsidiaries.........................................................71
6.9.    Ownership of Properties..............................................71
6.10.   Taxes................................................................71
6.11.   Pension and Welfare Plans............................................72
6.12.   Environmental Matters................................................72
6.13.   Regulations U and X..................................................73
6.14.   Accuracy of Information..............................................73
6.15.   Solvency.............................................................74




                                      -iv-

<PAGE>


6.16.  Year 2000 Compliance..................................................74

                                  ARTICLE VII

                                   COVENANTS

7.1.    Affirmative Covenants................................................74
7.1.1.  Financial Information, Reports, Notices, etc.........................74
7.1.2.  Compliance with Laws, etc............................................76
7.1.3.  Maintenance of Properties............................................76
7.1.4.  Insurance............................................................77
7.1.5.  Books and Records....................................................77
7.1.6.  Environmental Covenant...............................................77
7.1.7.  Future Subsidiaries..................................................78
7.1.8.  Future Leased Property and Future Acquisitions of Real Property;
          Future Acquisition of Other Property...............................79E
7.1.9.  Use of Proceeds, etc.................................................80
7.1.10. Hedging Obligations..................................................80
7.1.11. Undertaking..........................................................81
7.1.12. Mortgages............................................................81
7.1.13. Year 2000 Compliance.................................................82
7.2.    Negative Covenants...................................................82
7.2.1.  Business Activities..................................................82
7.2.2.  Indebtedness.........................................................82
7.2.3.  Liens................................................................84
7.2.4.  Financial Covenants..................................................86
7.2.5.  Investments..........................................................87
7.2.6.  Restricted Payments, etc.............................................90
7.2.7.  Capital Expenditures, etc............................................92
7.2.8.  Consolidation, Merger, etc...........................................93
7.2.9.  Asset Dispositions, etc..............................................94
7.2.10. Modification of Certain Agreements...................................95
7.2.11. Transactions with Affiliates.........................................95
7.2.12. Negative Pledges, Restrictive Agreements, etc........................96
7.2.13. Securities of Subsidiaries...........................................96
7.2.14. Sale and Leaseback...................................................96
7.2.15. Designation of Senior Indebtedness...................................97





                                      -v-

<PAGE>


                                  ARTICLE VIII

                               EVENTS OF DEFAULT

8.1.    Listing of Events of Default..........................................97
8.1.1.  Non-Payment of Obligations............................................97
8.1.2.  Breach of Warranty....................................................97
8.1.3.  Non-Performance of Certain Covenants and Obligations..................97
8.1.4.  Non-Performance of Other Covenants and Obligations....................97
8.1.5.  Default on Other Indebtedness.........................................97
8.1.6.  Judgments.............................................................98
8.1.7.  Pension Plans.........................................................98
8.1.8.  Change in Control.....................................................98
8.1.9.  Bankruptcy, Insolvency, etc...........................................98
8.1.10. Impairment of Security, etc...........................................99
8.1.11. Subordinated Notes....................................................99
8.2.    Action if Bankruptcy, etc............................................100
8.3.    Action if Other Event of Default.....................................100

                                   ARTICLE IX

                                   THE AGENTS

9.1.    Actions..............................................................100
9.2.    Funding Reliance, etc................................................101
9.3.    Exculpation; Notice of Default.......................................102
9.4.    Successor............................................................102
9.5.    Credit Extensions by each Agent......................................103
9.6.    Credit Decisions.....................................................103
9.7.    Copies, etc..........................................................103
9.8.    The Syndication Agent and the Administrative Agent...................103
9.9.    Documentation Agent..................................................104

                                   ARTICLE X

                            MISCELLANEOUS PROVISIONS

10.1.   Waivers, Amendments, etc.............................................104
10.2.   Notices..............................................................106
10.3.   Payment of Costs and Expenses........................................106




                                      -vi-

<PAGE>


10.4.    Indemnification.....................................................107
10.5.    Survival............................................................108
10.6.    Severability........................................................109
10.7.    Headings............................................................109
10.8.    Execution in Counterparts, Effectiveness, etc.......................109
10.9.    Governing Law; Entire Agreement.....................................109
10.10.   Successors and Assigns..............................................109
10.11.   Sale and Transfer of Loans and Notes; Participation in Loans and
             Notes...........................................................109
10.11.1. Assignments.........................................................110
10.11.2. Participations......................................................112
10.12.   Other Transactions..................................................113
10.13.   Forum Selection and Consent to Jurisdiction.........................113
10.14.   Waiver of Jury Trial................................................114
10.15.   Confidentiality.....................................................114


SCHEDULE I        -        Disclosure Schedule
SCHEDULE II       -        Percentages and Administrative Information

EXHIBIT A-1       -        Form of Revolving Note
EXHIBIT A-2       -        Form of Term-A Note
EXHIBIT A-3       -        Form of Term-B Note
EXHIBIT A-4       -        Form of Swing Line Note
EXHIBIT B-1       -        Form of Borrowing Request
EXHIBIT B-2       -        Form of Issuance Request
EXHIBIT C         -        Form of Continuation/Conversion Notice
EXHIBIT D         -        Form of Closing Date Certificate
EXHIBIT E         -        Form of Compliance Certificate
EXHIBIT F         -        Form of Restricted Payments Compliance Certificate
EXHIBIT G-1       -        Form of Holdco Guaranty and Pledge Agreement
EXHIBIT G-2       -        Form of Borrower Pledge and Security Agreement
EXHIBIT G-3       -        Form of Subsidiary Pledge and Security Agreement
EXHIBIT H         -        Form of Subsidiary Guaranty
EXHIBIT I         -        Form of Lender Assignment Agreement
EXHIBIT J-1       -        Form of New York Counsel Opinion
EXHIBIT J-2       -        Form of New York Counsel Opinion
EXHIBIT J-3       -        Form of General Counsel Opinion
EXHIBIT J-4       -        Form of Nevada Counsel Opinion
EXHIBIT J-5       -        Form of California Counsel Opinion




                                     -vii-

<PAGE>


                                CREDIT AGREEMENT


     THIS CREDIT AGREEMENT, dated as of September 29, 1999, is among Charles
River Laboratories, Inc., a Delaware corporation (the "Borrower"), the various
financial institutions as are or may become parties hereto (collectively, the
"Lenders") and DLJ Capital Funding, Inc. ("DLJ"), as lead arranger, as sole
book runner and as syndication agent for the Lenders (as syndication agent, the
"Syndication Agent" and collectively, the "Lead Arranger"), Union Bank of
California, N.A. ("UBOC"), as administrative agent (the "Administrative Agent")
for the Lenders (the Syndication Agent and the Administrative Agent are
sometimes referred to herein as the "Agents" and each as an "Agent"), and
National City Bank, as documentation agent (in such capacity, the
"Documentation Agent") for the Lenders.

                              W I T N E S S E T H:

     WHEREAS, DLJ Merchant Banking Partners II, L.P. and certain affiliated
entities (collectively, "DLJMBP") intend to acquire certain businesses and
operations of the Borrower, B&L CRL, Inc., formerly known as Charles River
Laboratories, Inc., a Delaware corporation ("CRL"), and certain other
Subsidiaries or Affiliates of Bausch & Lomb Inc., a Delaware corporation
("B&L"), which is the current 100% indirect owner of CRL, through a leveraged
recapitalization (the "Recapitalization"). The Recapitalization will be
consummated pursuant to the Recapitalization Agreement as amended (the
"Recapitalization Agreement"), dated as of July 25, 1999 entered into with B&L
and certain of its Subsidiaries and Affiliates (including CRL and the Borrower)
and DLJMBP;

     WHEREAS, the Recapitalization will be accomplished through (i) the
contribution to the Borrower of (a) substantially all of CRL's assets and (b)
certain related assets by certain other Subsidiaries and Affiliates of B&L (the
"Other Asset Contributors"), (ii) the formation of a holding company to be
named Charles River Laboratories Holdings, Inc., a Delaware corporation
("Holdco") that will hold directly all of the Capital Stock of the Borrower,
(iii) the formation by DLJMBP of (a) CRL Acquisition LLC ("Acquisition LLC"), a
Delaware limited liability company and a Subsidiary of DLJMBP, and (b) Charles
River Acquisition Corp. ("Acquisition Subco"), a Delaware corporation and a
Subsidiary of Acquisition LLC, (iv) the making of an equity contribution (the
"Member Contribution") by the members of Acquisition LLC (including DLJMBP and
certain members of management of the Borrower and its Affiliates) in an amount
equal to at least $90,000,000 to Acquisition LLC, (v) the making of an equity
contribution (the "Acquisition LLC Contribution" and together with the Member
Contribution, the "Equity Contributions") by Acquisition LLC of the Member
Contribution to Acquisition Subco, (vi) the issuance by Holdco of the Senior
Discount Debentures (such term and all other capitalized terms used in the
preamble and recitals hereto not otherwise defined therein shall have the
meanings




<PAGE>


assigned to such terms in Article I), (vii) the issuance by the Borrower of the
Senior Subordinated Notes and Warrants, (viii) the borrowing by the Borrower of
Loans to be made on the Closing Date, (ix) the payment of a dividend by the
Borrower to Holdco (the "Subco Dividend") in an aggregate principal amount
equal to the sum of the aggregate principal amounts of the debt incurred by the
Borrower under the preceding clauses (vii) and (viii) (less the amount of the
proceeds of such debt so incurred used to pay (A) the consideration for the
Sierra Acquisition in an amount not to exceed $24,000,000 plus reasonable fees
and expenses as described in clause (B) and (B) all reasonable and customary
fees and expenses paid by the Borrower in connection with the Transaction in an
amount not to exceed $20,000,000), (x) the redemption of all shares of all
Capital Stock of Holdco held by the Other Asset Contributors and all Capital
Stock of Holdco held by CRL except for the Rollover Equity and (xi) the merger
(the "Merger") of Acquisition Subco with and into Holdco, with Holdco to be the
surviving corporation of such merger (such Recapitalization and all
transactions related thereto, including those described in all of the recitals
hereto, being herein referred to as the "Transaction");

     WHEREAS, in connection with the Transaction, (i) the Other Asset
Contributors will receive cash in consideration for the redemption of their
shares by Holdco, (ii) the shares of Acquisition Subco held by Acquisition LLC
will be converted into approximately 87.5% of the outstanding common stock of
Holdco (after giving effect to the Merger), (iii) the shares of Holdco held by
CRL (other than the Rollover Equity) will be converted into (A) the right to
receive cash and (B) the Seller Subordinated Discount Note and (iv) CRL will
retain the Rollover Equity;

     WHEREAS, in connection with the Transaction, and pursuant to the
Transaction Documents, the Borrower will purchase all of the outstanding shares
of common stock of SBI in consideration for approximately $24,000,000 (the
"Sierra Acquisition") pursuant to an Amended and Restated Stock Purchase
Agreement, dated as of September 4, 1999 (the "Sierra Acquisition Agreement"),
among SBI Holdings, Inc., a Nevada corporation ("SBI"), and certain
shareholders of SBI;

     WHEREAS, in connection with the Transaction, and pursuant to the
Transaction Documents, the following capital-raising transactions will occur
prior to or contemporaneously with the consummation of the Transaction and the
making of the initial Credit Extensions hereunder:

          (a) the Borrower will issue not more than $150,000,000 in aggregate
     principal amount of its Senior Subordinated Notes (the "Senior
     Subordinated Notes") pursuant to the Senior Subordinated Note Indenture
     and Warrants (the "Warrants") to purchase 591,366 shares of common stock
     of Holdco pursuant to the Warrant Agreement, dated as of September 29,
     1999 (the "Warrant Agreement"), between Holdco and State Street




                                      -2-

<PAGE>


     Bank and Trust Company, as warrant agent (the issuance thereof being
     herein referred to as the "Subordinated Debt Issuance");

          (b) Holdco will issue not more than $40,000,000 in aggregate initial
     principal amount of its Senior Discount Debentures (the issuance thereof
     being herein referred to as the "Discount Debentures Issuance");

          (c) DLJMBP and the other members of Acquisition LLC will make the
     DLJMBP Contribution and Acquisition LLC will subsequently make the
     Acquisition LLC Contribution in each case, in cash in an amount of equal
     to at least $90,000,000;

          (d) Holdco will issue its Seller Subordinated Discount Note (the
     issuance thereof being herein referred to as the "Seller Note Issuance")
     in an initial principal amount of $43,000,000 to CRL; and

          (e) CRL will retain the Rollover Equity;

     WHEREAS, in connection with the Transaction and the ongoing working
capital and general corporate needs of the Borrower and its Subsidiaries, the
Borrower desires to obtain the following financing facilities from the Lenders:

          (a) a Term-A Loan Commitment and a Term-B Loan Commitment pursuant to
     which Borrowings of Term Loans will be made to the Borrower on the Closing
     Date in a maximum, original principal amount of $40,000,000 (in the case
     of Term-A Loans) and $120,000,000 (in the case of Term-B Loans);

          (b) a Revolving Loan Commitment (to include availability for
     Revolving Loans, Swing Line Loans and Letters of Credit) pursuant to which
     Borrowings of Revolving Loans, in a maximum aggregate principal amount
     (together with all Swing Line Loans and Letters of Credit Outstanding) not
     to exceed $30,000,000 (subject to a $25,000,000 increase under clause (c)
     of Section 2.1.2) will be made to the Borrower from time to time on and
     subsequent to the Closing Date but prior to the Revolving Loan Commitment
     Termination Date;

          (c) a Letter of Credit Commitment pursuant to which the Issuer will
     issue Letters of Credit for the account of the Borrower and its Restricted
     Subsidiaries from time to time on and subsequent to the Closing Date but
     prior to the Revolving Loan Commitment Termination Date in a maximum
     aggregate Stated Amount at any one time outstanding not to exceed
     $15,000,000 (provided, that the aggregate outstanding principal amount of
     Revolving Loans, Swing Line Loans and Letter of Credit Outstandings at any
     time shall not exceed the then existing Revolving Loan Commitment Amount);
     and




                                      -3-

<PAGE>


          (d) a Swing Line Loan Commitment pursuant to which Borrowings of
     Swing Line Loans in an aggregate outstanding principal amount not to
     exceed $5,000,000 will be made on and subsequent to the Closing Date but
     prior to the Revolving Loan Commitment Termination Date (provided, that
     the aggregate outstanding principal amount of such Swing Line Loans,
     together with Revolving Loans and Letter of Credit Outstandings, at any
     time shall not exceed the then existing Revolving Loan Commitment Amount);
     and

     WHEREAS, the Lenders are willing, on the terms and subject to the
conditions hereinafter set forth (including Article V), to extend the
Commitments and make the Loans described herein to the Borrower and issue (or
participate in) Letters of Credit for the account of the Borrower and its
Restricted Subsidiaries;

     NOW, THEREFORE, the parties hereto agree as follows:

                                   ARTICLE I

                        DEFINITIONS AND ACCOUNTING TERMS

     SECTION 1.1. Defined Terms. The following terms (whether or not
underscored) when used in this Agreement, including its preamble and recitals,
shall, except where the context otherwise requires, have the following meanings
(such meanings to be equally applicable to the singular and plural forms
thereof):

     "Acquired Controlled Person" means any Person (i) in which the Borrower or
any of its Restricted Subsidiaries has made an Investment permitted under
clause (l)(i)(y) of Section 7.2.5 and (ii) as to which the Borrower or such
Restricted Subsidiary exercises control. For purposes hereof, "control" means
the power to appoint a majority of the board of directors (or other equivalent
governing body) of such Person or to otherwise direct or cause the direction of
the management or policies of such Person, whether by contractual arrangement
or otherwise.

     "Acquisition LLC" is defined in the second recital.

     "Acquisition Subco" is defined in the second recital.

     "Administrative Agent" is defined in the preamble and includes each other
Person as shall have subsequently been appointed as the successor
Administrative Agent pursuant to Section 9.4.





                                      -4-

<PAGE>


     "Administrative Agent Fee Letter" means the confidential fee letter, dated
September 29, 1999, between the Borrower and the Administrative Agent.

     "Affiliate" of any Person means any other Person which, directly or
indirectly, controls, is controlled by or is under common control with such
Person (excluding any trustee under, or any committee with responsibility for
administering, any Plan). A Person shall be deemed to be "controlled by" any
other Person if such other Person possesses, directly or indirectly, power (i)
to vote 10% or more of the securities (on a fully diluted basis) having
ordinary voting power for the election of directors or managing general
partners, or (ii) to direct or cause the direction of the management and
policies of such Person whether by contract or otherwise.

     "Agents" means, collectively, the Administrative Agent and the Syndication
Agent.

     "Agreement" means, on any date, this Credit Agreement as originally in
effect on the Closing Date and as thereafter from time to time amended,
supplemented, amended and restated, or otherwise modified and in effect on such
date.

     "Alternate Base Rate" means, for any day and with respect to all Base Rate
Loans, the higher of: (a) 0.50% per annum above the latest Federal Funds Rate;
and (b) the reference rate of interest in effect for such day as most recently
publicly announced or established by the Administrative Agent in Los Angeles.
Any change in the reference rate established or announced by the Administrative
Agent shall take effect at the opening of business on the day of such
establishment or announcement. As used herein, the reference rate shall mean an
index rate determined by the Administrative Agent from time to time as a means
of pricing certain extensions of credit and is neither directly tied to any
external rate of interest or index nor necessarily the lowest rate of interest
charged by the Administrative Agent at any given time.

     "Annualized" means (i) with respect to the end of the first Fiscal Quarter
of the Borrower ending after the Closing Date, the applicable amount for such
Fiscal Quarter multiplied by four, (ii) with respect to the second Fiscal
Quarter of the Borrower ending after the Closing Date, the applicable amount
for such Fiscal Quarter and the immediately preceding Fiscal Quarter multiplied
by two, and (iii) with respect to the third Fiscal Quarter of the Borrower
ending after the Closing Date, the applicable amount for such Fiscal Quarter
and the immediately preceding two Fiscal Quarters multiplied by one and
one-third.

     "Applicable Commitment Fee" means, (i) for each day from the Closing Date
through (but excluding) the date upon which the Compliance Certificate for the
second full Fiscal Quarter ending after the Closing Date is delivered or
required to be delivered by the Borrower to the Administrative Agent pursuant
to clause (c) of Section 7.1.1, a fee which shall accrue at a rate of 1/2 of 1%
per annum, and (ii) for each day thereafter, a fee which shall accrue at the
applicable




                                      -5-

<PAGE>


rate per annum set forth below under the column entitled "Applicable Commitment
Fee", determined by reference to the applicable Leverage Ratio referred to
below:

                                                Applicable
                      Leverage Ratio          Commitment Fee
                      --------------          --------------

                     greater than or
                     equal to 4.0:1.0             0.500%

                    less than 4.0:1.0             0.375%

     The Leverage Ratio used to compute the Applicable Commitment Fee for any
day referred to in clause (ii) above shall be the Leverage Ratio set forth in
the Compliance Certificate most recently delivered by the Borrower to the
Administrative Agent on or prior to such day pursuant to clause (c) of Section
7.1.1. Changes in the Applicable Commitment Fee resulting from a change in the
Leverage Ratio shall become effective on the first day following delivery by
the Borrower to the Administrative Agent of a new Compliance Certificate
pursuant to clause (c) of Section 7.1.1. If the Borrower shall fail to deliver
a Compliance Certificate within the number of days after the end of any Fiscal
Quarter as required pursuant to clause (c) of Section 7.1.1 (without giving
effect to any grace period), the Applicable Commitment Fee from and including
the first day after the date on which such Compliance Certificate was required
to be delivered to and including the date the Borrower delivers to the
Administrative Agent the next Compliance Certificate shall conclusively equal
the highest Applicable Commitment Fee set forth above. Notwithstanding the
foregoing, the Borrower may, in its sole discretion, within ten Business Days
following the end of any Fiscal Quarter, deliver to the Administrative Agent a
written estimate (the "Leverage Ratio Estimate") setting forth the Borrower's
good faith estimate of the Leverage Ratio (based on calculations contained in
an estimated Compliance Certificate) that will be set forth in the next
Compliance Certificate required to be delivered by the Borrower to the
Administrative Agent pursuant to clause (c) of Section 7.1.1. In the event that
the Leverage Ratio Estimate indicates that there would be a change in the
Applicable Commitment Fee resulting from a change in the Leverage Ratio, such
change will become effective on the first day following delivery of the
Leverage Ratio Estimate. In the event that, once the next Compliance
Certificate is delivered, the Leverage Ratio as set forth in such Compliance
Certificate differs from that calculated in the Leverage Ratio Estimate
delivered for the Fiscal Quarter with respect to which such Compliance
Certificate has been delivered, and such difference results in an Applicable
Commitment Fee which is greater than the Applicable Commitment Fee theretofore
in effect, then (A) such greater Applicable Commitment Fee shall be deemed to
be in effect for all purposes of this Agreement from the first day following
the delivery of the Leverage Ratio Estimate and (B) if the Borrower shall have
theretofore made any payment of commitment fees in respect of the period from
the first day following the delivery of the Leverage Ratio Estimate to the
actual date of delivery of such Compliance Certificate, then, on the next
Quarterly




                                      -6-

<PAGE>


Payment Date, the Borrower shall pay as a supplemental payment of commitment
fees, an amount which equals the difference between the amount of commitment
fees that would otherwise have been paid based on such new Leverage Ratio and
the amount of such commitment fees actually so paid.

     "Applicable Margin" means at all times during the applicable periods set
forth below,

          (a) with respect to the unpaid principal amount of each Term-B Loan
     maintained as a (i) Base Rate Loan, 2.50% per annum and (ii) LIBO Rate
     Loan, 3.75% per annum;

          (b) from the Closing Date through (but excluding) the date upon which
     the Compliance Certificate for the second full Fiscal Quarter ending after
     the Closing Date is delivered by the Borrower to the Administrative Agent
     pursuant to clause (c) of Section 7.1.1, with respect to the unpaid
     principal amount of each (i) Swing Line Loan (which shall be borrowed and
     maintained only as a Base Rate Loan) and each Revolving Loan and Term-A
     Loan maintained as a Base Rate Loan, 1.75% per annum, and (ii) Revolving
     Loan and Term-A Loan maintained as a LIBO Rate Loan, 3.00% per annum; and

          (c) at all times after the date of delivery of the Compliance
     Certificate described in clause (b) above, with respect to the unpaid
     principal amount of each Swing Line Loan (which shall be borrowed and
     maintained only as a Base Rate Loan) and each Revolving Loan and Term-A
     Loan, the rate determined by reference to the applicable Leverage Ratio
     and at the applicable percentage per annum set forth below under the
     column entitled "Applicable Margin for Base Rate Loans", in the case of
     Base Rate Loans, or by reference to the applicable Leverage Ratio and at
     the applicable percentage per annum set forth below under the column
     entitled "Applicable Margin for LIBO Rate Loans" in the case of LIBO Rate
     Loans:

    Applicable Margin For Revolving Loans, Swing Line Loans and Term-A Loans
    ------------------------------------------------------------------------
                                           Applicable             Applicable
                                        Margin For Base        Margin For LIBO
           Leverage Ratio                  Rate Loans             Rate Loans
           --------------                  ----------             ----------

  greater than or equal to 5.0:1.0           1.75%                  3.00%

greater than or equal to 4.0:1.0 and
          less than 5.0:1.0                  1.25%                  2.50%






                                      -7-

<PAGE>


                                           Applicable             Applicable
                                        Margin For Base        Margin For LIBO
           Leverage Ratio                  Rate Loans             Rate Loans
           --------------                  ----------             ----------

greater than or equal to 3.0:1.0 and
          less than 4.0:1.0                   0.75%                  2.00%

          less than 3.0:1.0                   0.25%                  1.50%

     The Leverage Ratio used to compute the Applicable Margin for Swing Line
Loans, Revolving Loans and Term-A Loans for any day referred to in clause (c)
above shall be the Leverage Ratio set forth in the Compliance Certificate most
recently delivered by the Borrower to the Administrative Agent on or prior to
such day pursuant to clause (c) of Section 7.1.1. Changes in the Applicable
Margin for Swing Line Loans, Revolving Loans and Term-A Loans resulting from a
change in the Leverage Ratio shall become effective on the first day following
delivery by the Borrower to the Administrative Agent of a new Compliance
Certificate pursuant to clause (c) of Section 7.1.1. If the Borrower shall fail
to deliver a Compliance Certificate within the number of days after the end of
any Fiscal Quarter as required pursuant to clause (c) of Section 7.1.1 (without
giving effect to any grace period), the Applicable Margin for Swing Line Loans,
Revolving Loans and Term-A Loans from and including the first day after the
date on which such Compliance Certificate was required to be delivered to the
date the Borrower delivers to the Administrative Agent the next Compliance
Certificate shall conclusively equal the highest Applicable Margin for Swing
Line Loans, Revolving Loans and Term-A Loans set forth above. Notwithstanding
the foregoing, the Borrower may, in its sole discretion, within ten Business
Days following the end of any Fiscal Quarter, deliver to the Administrative
Agent a Leverage Ratio Estimate setting forth the Borrower's good faith
estimate of the Leverage Ratio (based on calculations set forth in an estimated
Compliance Certificate) that will be set forth in the next Compliance
Certificate required to be delivered by the Borrower to the Administrative
Agent pursuant to clause (c) of Section 7.1.1. In the event that the Leverage
Ratio Estimate indicates that there would be a change in the Applicable Margin
resulting from a change in the Leverage Ratio, such change will become
effective on the first day following delivery of the Leverage Ratio Estimate.
In the event that, once the next Compliance Certificate is delivered, the
Leverage Ratio as set forth in such Compliance Certificate differs from that
calculated in the Leverage Ratio Estimate delivered for the Fiscal Quarter with
respect to which such Compliance Certificate has been delivered, and such
difference results in an Applicable Margin which is greater than the Applicable
Margin theretofore in effect, then (A) such greater Applicable Margin shall be
deemed to be in effect for all purposes of this Agreement from the first day
following the delivery of the Leverage Ratio Estimate and (B) if the Borrower
shall have theretofore made any payment of interest in respect of Swing Line
Loans, Revolving Loans or Term-A Loans, or of letter of credit fees pursuant to
the first sentence of Section 3.3.3, in any such case in respect of the period
from the first day following the delivery of the Leverage Ratio Estimate to the
actual




                                      -8-

<PAGE>


date of delivery of such Compliance Certificate, then, on the next Quarterly
Payment Date, the Borrower shall pay as a supplemental payment of interest
and/or letter of credit fees, an amount which equals the difference between the
amount of interest and letter of credit fees that would otherwise have been
paid based on such new Leverage Ratio and the amount of such interest and
letter of credit fees actually so paid.

     "Assignee Lender" is defined in Section 10.11.1.

     "Assignor Lender" is defined in Section 10.11.1.

     "Assumed Indebtedness" means Indebtedness of a Person which is (i) in
existence at the time such Person becomes a Restricted Subsidiary of the
Borrower or (ii) is assumed in connection with an Investment in or acquisition
of such Person, and has not been incurred or created by such Person in
connection with, or in anticipation or contemplation of, such Person becoming a
Restricted Subsidiary of the Borrower.

     "Authorized Officer" means, relative to any Obligor, those of its officers
whose signatures and incumbency shall have been certified to the Administrative
Agent and the Lenders pursuant to Section 5.1.1.

     "Base Financial Statements" is defined in clause (a) of Section 5.1.9.

     "Base Rate Loan" means a Loan bearing interest at a fluctuating rate
determined by reference to the Alternate Base Rate.

     "B&L" is defined in the first recital.

     "Borrower" is defined in the preamble.

     "Borrower Pledge and Security Agreement" means the Pledge and Security
Agreement executed and delivered by an Authorized Officer of the Borrower
pursuant to clause (b) of Section 5.1.7, substantially in the form of Exhibit
G-2 hereto, together with any supplemental Foreign Pledge Agreements delivered
pursuant to the terms of this Agreement, in each case as amended, supplemented,
amended and restated or otherwise modified from time to time.

     "Borrowing" means Loans of the same type and, in the case of LIBO Rate
Loans, having the same Interest Period made by the relevant Lenders on the same
Business Day and pursuant to the same Borrowing Request in accordance with
Section 2.1.

     "Borrowing Request" means a loan request and certificate duly executed by
an Authorized Officer of the Borrower, substantially in the form of Exhibit B-1
hereto.




                                      -9-

<PAGE>


     "Business Day" means any day which is neither a Saturday or Sunday nor a
legal holiday on which banks are authorized or required to be closed in Los
Angeles and, with respect to Borrowings of, Interest Periods with respect to,
payments of principal and interest in respect of, and conversions of Base Rate
Loans into, LIBO Rate Loans, on which dealings in Dollars are carried on in the
London interbank market.

     "Capital Expenditures" means for any period, the sum, without duplication,
of (i) the aggregate amount of all expenditures of the Borrower and its
Restricted Subsidiaries for fixed or capital assets made during such period
which, in accordance with GAAP, would be classified as capital expenditures,
and (ii) the aggregate amount of the principal component of all Capitalized
Lease Liabilities incurred during such period by the Borrower and its
Restricted Subsidiaries; provided that Capital Expenditures shall not include
(i) any such expenditures or any such principal component funded with (x) any
Casualty Proceeds, as permitted under clause (e) of Section 3.1.1, or (y) any
Net Disposition Proceeds of any asset sale permitted under clause (c) of
Section 7.2.9 or any asset sale of obsolete or worn out equipment permitted
under subclause (a)(i) of Section 7.2.9 or (ii) any Investment made under
Section 7.2.5 (other than pursuant to clause (d) thereof).

     "Capital Stock" means, (i) in the case of a corporation, any and all
capital or corporate stock, including shares of preferred or preference stock
of such corporation, (ii) in the case of an association or business entity, any
and all shares, interests, participations, rights or other equivalents (however
designated) in respect of corporate or capital stock, (iii) in the case of a
partnership or limited liability company, any and all partnership or membership
interests (whether general or limited) and (iv) any other interest or
participation that confers on a Person the right to receive a share of the
profits and losses of, or distributions of assets of, the issuing Person.

     "Capitalized Lease Liabilities" means, without duplication, all monetary
obligations of the Borrower or any of its Subsidiaries under any leasing or
similar arrangement which, in accordance with GAAP, would be classified as
capitalized leases, and, for purposes of this Agreement and each other Loan
Document, the amount of such obligations shall be the capitalized amount
thereof, determined in accordance with GAAP, and the stated maturity thereof
shall be the date of the last payment of rent or any other amount due under
such lease prior to the first date upon which such lease may be terminated by
the lessee without payment of a penalty.




                                      -10-

<PAGE>


     "Cash Equivalent Investment" means, at any time:

          (a) any evidence of Indebtedness, maturing not more than one year
     after such time, issued directly by the United States of America or any
     agency thereof or guaranteed by the United States of America or any agency
     thereof;

          (b) commercial paper, maturing not more than nine months from the
     date of issue, which is (i) rated at least A-l by S&P or P-l by Moody's
     and not issued by an Affiliate of any Obligor, or (ii) issued by any
     Lender (or its holding company);

          (c) any time deposit, certificate of deposit or bankers acceptance,
     maturing not more than one year after such time, maintained with or issued
     by either (i) a commercial banking institution (including U.S. branches of
     foreign banking institutions) that is a member of the Federal Reserve
     System and has a combined capital and surplus and undivided profits of not
     less than $500,000,000, or (ii) any Lender;

          (d) short-term tax-exempt securities rated not lower than MIG-1/1+ by
     either Moody's or S&P with provisions for liquidity or maturity
     accommodations of 183 days or less;

          (e) repurchase agreements which (i) are entered into with any entity
     referred to in clause (b) or (c) above or any other financial institution
     whose unsecured long-term debt (or the unsecured long-term debt of whose
     holding company) is rated at least A- or better by S&P or Baa1 or better
     by Moody's and maturing not more than one year after such time, (ii) are
     secured by a fully perfected security interest in securities of the type
     referred to in clause (a) above and (iii) have a market value at the time
     of such repurchase agreement is entered into of not less than 100% of the
     repurchase obligation of such counterparty entity with whom such
     repurchase agreement has been entered into;

          (f) any money market or similar fund not less than 95% of the assets
     of which are comprised of any of the items specified in clauses (a)
     through (e) above and as to which withdrawals are permitted at least every
     90 days; or

          (g) in the case of any Restricted Subsidiary of the Borrower
     organized or having its principal place of business outside the United
     States, investments denominated in the currency of the jurisdiction in
     which such Subsidiary is organized or has its principal place of business
     which are similar to the items specified in clauses (a) through (f) above.

     "Casualty Event" means the damage, destruction or condemnation, as the
case may be, of any property of the Borrower or any of its Restricted
Subsidiaries.




                                      -11-

<PAGE>



     "Casualty Proceeds" means, with respect to any Casualty Event, the amount
of any insurance proceeds or condemnation awards received by the Borrower or
any of its Restricted Subsidiaries in connection therewith, but excluding any
proceeds or awards required to be paid to a creditor (other than the Lenders)
which holds a Lien on the property which is the subject of such Casualty Event
which Lien (x) is permitted by Section 7.2.3 and (y) has priority over the
Liens securing the Obligations.

     "CERCLA" means the Comprehensive Environmental Response, Compensation and
Liability Act of 1980, as amended.

     "CERCLIS" means the Comprehensive Environmental Response Compensation
Liability Information System List.

     "Change in Control" means (i) the failure of Holdco at any time to own,
free and clear of all Liens and encumbrances (other than Liens of the types
permitted to exist under clauses (b), (d) and (g) of Section 7.2.3), all right,
title and interest in 100% of the Capital Stock of the Borrower; (ii) the
failure of the DLJMBP at any time to own, free and clear of all Liens and
encumbrances (other than Liens (x) arising under the Investors' Agreement and
(y) of the types permitted to exist under clause (d) or (g) of Section 7.2.3)
all right, title and interest in at least 51% (on a fully diluted basis) of the
economic and voting interest in the Voting Stock of Holdco; or (iii) the
failure of DLJMBP and its Affiliates at any time to have the right to designate
or cause to be elected a majority of the Board of Directors of Holdco.

     "Charles River China" means SPAFAS Jinan Poultry Company, Ltd., a Chinese
corporation and Zhanjiang A&C Biological Ltd., a Chinese corporation.

     "Charles River Mexico" means Avers Libers de Patogenos Especificos, S.A.
de C.V., a Mexican corporation.

     "Charles River Japan" means Charles River Japan, Inc., a Japanese
corporation.

     "Charter Document" means, relative to any Obligor, its certificate of
incorporation, its by-laws or other constituent documents and all shareholder
agreements, voting trusts and similar arrangements to which such Obligor is a
party applicable to any of its authorized shares of Capital Stock.

     "Closing Date" means the date of the initial Credit Extension, not to be
later than September 29, 1999.

     "Closing Date Certificate" means a certificate of an Authorized Officer of
the Borrower substantially in the form of Exhibit D hereto, delivered pursuant
to Section 5.1.4.




                                      -12-

<PAGE>


     "Code" means the Internal Revenue Code of 1986, as amended.

     "Commitment" means, as the context may require, (i) a Lender's Term-A Loan
Commitment, and Term-B Loan Commitment, Revolving Loan Commitment or Letter of
Credit Commitment or (ii) the Swing Line Lender's Swing Line Loan Commitment.

     "Commitment Amount" means, as the context may require, the Term-A Loan
Commitment Amount, the Term-B Loan Commitment Amount, the Revolving Loan
Commitment Amount, the Letter of Credit Commitment Amount or the Swing Line
Loan Commitment Amount.

     "Commitment Letter" means the commitment letter, dated July 23, 1999,
between DLJ Merchant Banking II, Inc. and DLJ, including all annexes and
exhibits thereto.

     "Commitment Termination Date" means, as the context may require, the
Revolving Loan Commitment Termination Date or any Term Loan Commitment
Termination Date.

     "Commitment Termination Event" means (i) the occurrence of any Event of
Default described in clauses (b) through (d) of Section 8.1.9 with respect to
any Obligor (other than Subsidiaries that are not Material Subsidiaries), or
(ii) the occurrence and continuance of any other Event of Default and either
(x) the declaration of the Loans to be due and payable pursuant to Section 8.3,
or (y) in the absence of such declaration, the giving of notice to the Borrower
by the Administrative Agent, acting at the direction of the Required Lenders,
that the Commitments have been terminated.

     "Compliance Certificate" means a certificate duly completed and executed
by an Authorized Officer that is the president, the chief executive officer or
the chief financial or accounting officer of the Borrower, substantially in the
form of Exhibit E hereto.

     "Contingent Liability" means any agreement, undertaking or arrangement by
which any Person guarantees, endorses or otherwise becomes or is contingently
liable upon (by direct or indirect agreement, contingent or otherwise, to
provide funds for payment, to supply funds to, or otherwise to invest in, a
debtor, or otherwise to assure a creditor against loss) the indebtedness,
obligation or any other liability of any other Person (other than by
endorsements of instruments in the course of collection), or guarantees the
payment of dividends or other distributions upon the shares of any other
Person. The amount of any Person's obligation under any Contingent Liability
shall (subject to any limitation set forth therein) be deemed to be the
outstanding principal amount of the debt, obligation or other liability
guaranteed thereby.





                                      -13-

<PAGE>


     "Continuation/Conversion Notice" means a notice of continuation or
conversion and certificate duly executed by an Authorized Officer of the
Borrower, substantially in the form of Exhibit C hereto.

     "Controlled Group" means all members of a controlled group of corporations
and all members of a controlled group of trades or businesses (whether or not
incorporated) under common control which, together with the Borrower, are
treated as a single employer under Section 414(b) or 414(c) of the Code or
Section 4001 of ERISA, or for purposes of Section 412 of the Code, Section
414(m) or Section 414(o) of the Code.

     "Credit Extension" means, as the context may require, (i) the making of a
Loan by a Lender, or (ii) the issuance of any Letter of Credit, or the
extension of any Stated Expiry Date of any previously issued Letter of Credit,
by any Issuer.

     "Credit Extension Request" means, as the context may require, any
Borrowing Request or Issuance Request.

     "CRL" is defined in the first recital.

     "Current Assets" means, on any date, without duplication, all assets
which, in accordance with GAAP, would be included as current assets on a
consolidated balance sheet of the Borrower and its Restricted Subsidiaries at
such date as current assets (excluding, however, amounts due and to become due
from Affiliates of the Borrower which have arisen from transactions which are
other than arm's-length and in the ordinary course of its business).

     "Current Liabilities" means, on any date, without duplication, all amounts
which, in accordance with GAAP, would be included as current liabilities on a
consolidated balance sheet of the Borrower and its Restricted Subsidiaries at
such date, excluding current maturities of Indebtedness.

     "Debt" means, without duplication, the outstanding principal amount of all
Indebtedness of the Borrower and its Restricted Subsidiaries that (i) is of the
type referred to in clause (a), (b) (other than undrawn commercial letters of
credit and undrawn letters of credit in respect of workers' compensation,
insurance, performance and surety bonds and similar obligations, in each case
incurred in the ordinary course of business) or (c) of the definition of
"Indebtedness" and (ii) any Contingent Liability in respect of any of the
foregoing types of Indebtedness.

     "Default" means any Event of Default or any condition, occurrence or event
which, after notice or lapse of time or both, would, unless cured or waived,
constitute an Event of Default.

     "Disbursement" is defined in Section 2.6.2.




                                      -14-

<PAGE>


     "Disbursement Date" is defined in Section 2.6.2.

     "Disbursement Due Date" is defined in Section 2.6.2.

     "Disclosure Schedule" means the Disclosure Schedule attached hereto as
Schedule I, as it may be amended, supplemented or otherwise modified from time
to time by the Borrower with the written consent of the Required Lenders.

     "Discount Debentures Issuance" is defined in clause (b) of the fifth
recital.

     "DLJ" is defined in the preamble.

     "DLJMBP" is defined in the first recital.

     "DLJMBP Contribution" is defined in the second recital.

     "Documentation Agent" is defined in the preamble.

     "Dollar" and the sign "$" mean lawful money of the United States.

     "Earn-outs" means any obligations by the Borrower or any of its Restricted
Subsidiaries to pay any amounts constituting the payment of deferred purchase
price with respect to any acquisition of a business (whether through the
purchase of assets or shares of Capital Stock), the amount of which payments is
calculated on the basis of, or by reference to, the bona fide financial or
other operating performance of such business or specified portion thereof or
any other similar arrangement.

     "EBITDA" means, for any applicable period, subject to clause (b) of
Section 1.4, the sum (without duplication) for the Borrower and its Restricted
Subsidiaries on a consolidated basis of

          (a) Net Income,

plus

          (b) the amount deducted in determining Net Income representing
     non-cash charges or expenses, including depreciation and amortization
     (excluding any non-cash charges representing an accrual of or reserve for
     cash charges to be paid within the next twelve months),

plus





                                      -15-

<PAGE>


          (c) the amount deducted in determining Net Income representing income
     taxes (whether paid or deferred),

plus

          (d) the amount deducted in determining Net Income representing
     Interest Expense and Transaction Payments,

minus

          (e) Restricted Payments of the type referred to in clause (c)(i) of
     Section 7.2.6 made during such period.

     "Eligible Institution" means a financial institution that has combined
capital and surplus of not less than $500,000,000 or its equivalent in foreign
currency, whose the long-term certificate of deposit rating or long-term senior
unsecured debt rating is rated "BBB" or higher by S&P and "Baa2" or higher by
Moody's or an equivalent or higher rating by a nationally recognized rating
agency if both of the two named rating agencies cease publishing ratings of
investments.

     "Environmental Laws" means all applicable federal, state or local
statutes, laws, ordinances, codes, rules and regulations (including consent
decrees and administrative orders) relating to the protection of the
environment or the effect of the environment on human health and safety.

     "Equity Contributions" is defined in the second recital.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

     "Event of Default" is defined in Section 8.1.

     "Excess Cash Flow" means, for any applicable period, the excess (if any),
of

          (a) EBITDA for such applicable period;

over

          (b) the sum, without duplication (for such applicable period) of

               (i) the cash portion of Interest Expense (net of interest
          income) for such applicable period;




                                      -16-

<PAGE>


         plus

               (ii) scheduled payments, to the extent actually made, of the
          principal amount of the Term Loans and scheduled payments and
          optional and mandatory prepayments of the principal of any other
          funded Debt (including Capitalized Lease Liabilities) and mandatory
          prepayments of the principal amount of Revolving Loans pursuant to
          clause (f) of Section 3.1.1 in connection with a permanent reduction
          of any Revolving Loan Commitment Amount, in each case to the extent
          actually made and for such applicable period;

         plus

               (iii) all federal, state and foreign income taxes actually paid
          in cash by the Borrower and its Restricted Subsidiaries for such
          applicable period;

         plus

               (iv) Capital Expenditures actually made during such applicable
          period pursuant to clause (a) of Section 7.2.7 (excluding Capital
          Expenditures constituting Capitalized Lease Liabilities and by way of
          the incurrence of Indebtedness permitted pursuant to clause (c) of
          Section 7.2.2 to a vendor of any assets permitted to be acquired
          pursuant to Section 7.2.7 to finance the acquisition of such assets);

         plus

               (v) the amount of the net increase (if any) of Current Assets,
          other than cash and Cash Equivalent Investments, over Current
          Liabilities of the Borrower and its Restricted Subsidiaries for such
          applicable period;

         plus

               (vi) Investments permitted and actually made, in cash, pursuant
          to clause (d), (h), (l) or (p) of Section 7.2.5 during such
          applicable period (excluding Investments financed with the proceeds
          of any issuance of Capital Stock or Indebtedness other than Revolving
          Loans);

         plus

               (vii) Restricted Payments of the type described in clauses
          (c)(ii) and (c)(iii) of Section 7.2.6 made during such applicable
          period.




                                      -17-

<PAGE>


     "Exchange Act" means the Securities Exchange Act of 1934, as amended.

     "Excluded Equity Proceeds" means any proceeds received by Holdco, the
Borrower or any of their respective Subsidiaries from the sale or issuance by
such Person of its Capital Stock or any warrants or options in respect of any
such Capital Stock or the exercise of any such warrants or options, in each
case pursuant to any such sale, issuance or exercise constituting or resulting
from (i) capital contributions to, or Capital Stock issuances by, Holdco, the
Borrower or any of their respective Subsidiaries (exclusive of any such
contribution or issuance resulting from a Public Offering or a widely
distributed private offering exempted from the registration requirements of
Section 5 of the Securities Act of 1933, as amended), (ii) any subscription
agreement, option plan, incentive plan or similar arrangement with any officer,
employee or director of such Person or any of its Subsidiaries, (iii) any loan
made by Holdco, the Borrower or any of their respective Subsidiaries pursuant
to clause (g) of Section 7.2.5, (iv) the sale of any Capital Stock of Holdco to
any officer, director or employee described in clause (ii) above; provided such
proceeds do not exceed $15,000,000 in the aggregate, (v) the exercise of any
options or warrants issued to any officer, employee or director pursuant to any
agreement, plan or arrangement described in clause (ii) above or (vi) the
exercise of any Warrants.

     "Existing Business" means the businesses of the commercial production and
supply of animal research models and related biomedical products and services
of CRL and the Other Asset Contributors contributed to the Borrower as such
businesses were in existence and carried on immediately prior to the Closing
Date.

     "Federal Funds Rate" means, for any period, a fluctuating interest rate
per annum equal for each day during such period to (i) the weighted average of
the rates on overnight federal funds transactions with members of the Federal
Reserve System arranged by federal funds brokers, as published for such day
(or, if such day is not a Business Day, for the next preceding Business Day) by
the Federal Reserve Bank of New York, or (ii) if such rate is not so published
for any day which is a Business Day, the average of the quotations for such day
on such transactions received by the Administrative Agent from three federal
funds brokers of recognized standing selected by it.

     "Fee Letter" means the confidential fee letter, dated as of July 23, 1999,
among DLJ Merchant Banking Funding II, Inc. and DLJ.

     "Filing Agent" is defined in Section 5.1.8.

     "Filing Statement" means any UCC financing statement (Form UCC-1) or other
similar statement or UCC termination statement (Form UCC-3) required pursuant
to the Loan Documents.





                                      -18-

<PAGE>


     "Fiscal Quarter" means any fiscal quarter of a Fiscal Year.

     "Fiscal Year" means any twelve-month period ending on December 31 of any
calendar year.

     "Fixed Charge Coverage Ratio" means, at the end of any Fiscal Quarter,
subject to clause (b) of Section 1.4, the ratio computed for the period
consisting of such Fiscal Quarter and each of the three immediately prior
Fiscal Quarters of

          (a) (i) EBITDA for all such Fiscal Quarters; minus

             (ii) Capital Expenditures actually made during all such Fiscal
     Quarters pursuant to clause (a) of Section 7.2.7 (excluding Capital
     Expenditures constituting Capitalized Lease Liabilities and by way of the
     incurrence of Indebtedness permitted pursuant to Section 7.2.2(c) to a
     vendor of any assets permitted to be acquired pursuant to Section 7.2.7 to
     finance the acquisition of such assets).

     over

          (b) the sum (without duplication) of

               (i) the cash portion of Interest Expense (net of interest
          income) for all such Fiscal Quarters, provided that for the first
          full three Fiscal Quarters ending after the Closing Date, Interest
          Expense shall be determined on an Annualized basis;

     plus

               (ii) all scheduled payments of principal of the Term Loans and
          other funded Debt (including the principal portion of any Capitalized
          Lease Liabilities) during all such Fiscal Quarters, provided that for
          the first full three Fiscal Quarters ending after the Closing Date,
          such payments shall be determined on an Annualized basis;

     plus

               (iii) Restricted Payments made or permitted to be made pursuant
          to clauses (c)(ii) and (c)(iii)(y) of Section 7.2.6 during all such
          Fiscal Quarters;

     plus




                                      -19-

<PAGE>


               (iv) all federal, state and foreign income taxes actually paid
          or payable in cash by the Borrower and its Restricted Subsidiaries
          for all such Fiscal Quarters.

     "Foreign Pledge Agreement" means any supplemental pledge agreement
governed by the laws of a jurisdiction other than the United States or a State
thereof executed and delivered by the Borrower or any of its Restricted
Subsidiaries pursuant to the terms of this Agreement, in form and substance
satisfactory to the Administrative Agent, as may be necessary or desirable
under the laws of organization or incorporation of a Subsidiary to further
protect or perfect the Lien on and security interest in any Collateral (as
defined in a Pledge Agreement).

     "Foreign Subsidiary" means any Subsidiary that is not a U.S. Subsidiary.

     "F.R.S. Board" means the Board of Governors of the Federal Reserve System
or any successor thereto.

     "Future Pledged Foreign Subsidiary" is a Restricted Subsidiary and a
Foreign Subsidiary having, at any time of determination, total assets with a
value of at least $5,000,000.

     "GAAP" is defined in Section 1.4.

     "Hazardous Material" means

          (a) any "hazardous substance", as defined by CERCLA;

          (b) any "hazardous waste", as defined by the Resource Conservation
     and Recovery Act, as amended;

          (c) any petroleum product; or

          (d) any pollutant or contaminant or hazardous, dangerous or toxic
     chemical, material or substance within the meaning of any other applicable
     Environmental Law.

     "Hedging Obligations" means, with respect to any Person, all liabilities
of such Person under interest rate or currency swap agreements, interest or
exchange rate cap agreements and interest or exchange rate collar agreements,
and all other agreements or arrangements designed to protect such Person
against fluctuations in interest rates, currency exchange rates or commodity
prices.

     "herein", "hereof", "hereto", "hereunder" and similar terms contained in
this Agreement or any other Loan Document refer to this Agreement or such other
Loan Document, as the case




                                      -20-

<PAGE>


may be, as a whole and not to any particular Section, paragraph or provision of
this Agreement or such other Loan Document.

     "Holdco" is defined in the second recital.

     "Holdco Guaranty and Pledge Agreement" means the Guaranty and Pledge
Agreement executed and delivered by an Authorized Officer of Holdco pursuant to
clause (a) of Section 5.1.7, substantially in the form of Exhibit G-1 hereto,
as amended, supplemented, amended and restated or otherwise modified from time
to time.

     "Impermissible Qualification" means, relative to the opinion or
certification of any independent public accountant as to any financial
statement of any Obligor, any qualification or exception to such opinion or
certification (i) which is of a "going concern" or similar nature, (ii) which
relates to the limited scope of examination of matters relevant to such
financial statement (except, in the case of matters relating to any acquired
business or assets, in respect of the period prior to the acquisition by such
Obligor of such business or assets), or (iii) which relates to the treatment or
classification of any item in such financial statement and which, as a
condition to its removal, would require an adjustment to such item the effect
of which would be to cause the Borrower to be in default of any of its
obligations under Section 7.2.4.

     "including" means including without limiting the generality of any
description preceding such term, and, for purposes of this Agreement and each
other Loan Document, the parties hereto agree that the rule of ejusdem generis
shall not be applicable to limit a general statement, which is followed by or
referable to an enumeration of specific matters, to matters similar to the
matters specifically mentioned.

     "Indebtedness" of any Person means, without duplication:

          (a) all obligations of such Person for borrowed money or for the
     deferred purchase price of property or services (exclusive of (i) deferred
     purchase price arrangements in the nature of open or other accounts
     payable owed to suppliers on normal terms in connection with the purchase
     of goods and services in the ordinary course of business and (ii)
     Earn-outs (until such time as the obligation associated with the Earn-out
     is recorded as a liability on the balance sheet of the Borrower in
     accordance with GAAP)) and all obligations of such Person evidenced by
     bonds, debentures, notes or other similar instruments;

          (b) all obligations, contingent or otherwise, relative to the face
     amount of all letters of credit, whether or not drawn, and banker's
     acceptances issued for the account of such Person;





                                      -21-

<PAGE>


          (c) all Capitalized Lease Liabilities;

          (d) net liabilities of such Person under all Hedging Obligations;

          (e) whether or not so included as liabilities in accordance with
     GAAP, all Indebtedness of the types referred to in clauses (a) through (d)
     above (excluding prepaid interest thereon) secured by a Lien on property
     owned or being purchased by such Person (including Indebtedness arising
     under conditional sales or other title retention agreements), whether or
     not such Indebtedness shall have been assumed by such Person or is limited
     in recourse; provided, however, that, to the extent such Indebtedness is
     limited in recourse to the assets securing such Indebtedness, the amount
     of such Indebtedness shall be limited to the fair market value of such
     assets; and

          (f) all Contingent Liabilities of such Person in respect of any of
     the foregoing.

For all purposes of this Agreement, the Indebtedness of any Person shall
include the Indebtedness of any partnership or joint venture in which such
Person is a general partner or a joint venturer (to the extent such Person is
liable for such Indebtedness).

     "Indemnified Liabilities" is defined in Section 10.4.

     "Indemnified Parties" is defined in Section 10.4.

     "Initial Public Offering" means for any Person, any sale of the Capital
Stock of such Person to the public pursuant to an initial primary offering
registered under the Securities Act of 1933.

     "Interest Coverage Ratio" means, at the end of any Fiscal Quarter, subject
to clause (b) of Section 1.4, the ratio computed for the period consisting of
such Fiscal Quarter and each of the three immediately prior Fiscal Quarters of:

          (a) EBITDA (for all such Fiscal Quarters)

to

          (b) the cash portion of Interest Expense (net of interest income)
     (for all such Fiscal Quarters; provided that for the first full three
     Fiscal Quarters ending after the Closing Date, Interest Expense shall be
     determined on an Annualized basis).

     "Interest Expense" means, for any applicable period, the aggregate
consolidated interest expense of the Borrower and its Restricted Subsidiaries
for such applicable period, as determined




                                      -22-

<PAGE>


in accordance with GAAP, including the portion of any payments made in respect
of Capitalized Lease Liabilities allocable to interest expense, but excluding
(to the extent included in interest expense) up-front fees and expenses and the
amortization of all deferred financing costs.

     "Interest Period" means, as to any LIBO Rate Loan, the period commencing
on the Borrowing date of such Loan or on the date on which the Loan is
converted into or continued as a LIBO Rate Loan, and ending on the date one,
two, three, six or, if consented to by each applicable Lender, nine or twelve
months thereafter as selected by the Borrower in its Borrowing Request or its
Conversion/Continuation Notice; provided however that:

          (i) if any Interest Period would otherwise end on a day that is not a
     Business Day, that Interest Period shall be extended to the following
     Business Day unless the result of such extension would be to carry such
     Interest Period into another calendar month, in which event such Interest
     Period shall end on the preceding Business Day;

          (ii) any Interest Period that begins on the last Business Day of a
     calendar month (or on a day for which there is no numerically
     corresponding day in the calendar month at the end of such Interest
     Period) shall end on the last Business Day of the calendar month at the
     end of such Interest Period;

          (iii) no Interest Period for any Loan shall extend beyond the Stated
     Maturity Date for such Loan;

          (iv) no Interest Period applicable to a Term Loan or portion thereof
     shall extend beyond any date upon which is due any scheduled principal
     payment in respect of the Term Loans unless the aggregate principal amount
     of Term Loans represented by Base Rate Loans, or by LIBO Rate Loans having
     Interest Periods that will expire on or before such date, equals or
     exceeds the amount of such principal payment; and

          (v) there shall be no more than ten Interest Periods in effect at any
     one time;

provided that with respect to each Borrowing of Term Loans consisting of LIBO
Rate Loans made on the Closing Date, Interest Period means the period
commencing on (and including) the Business Day on which such Borrowing is made
and ending on (and including) the last Business Day of the calendar month
following the month in which such Borrowing is made.

     "Investors' Agreement" means the Investors' Agreement dated as of
September 29, 1999 among Holdco, DLJMBP, Acquisition LLC and certain other
holders of the Capital Stock of Holdco from time to time party thereto.





                                      -23-

<PAGE>


     "Investment" means, relative to any Person, (i) any loan or advance made
by such Person to any other Person (excluding commission, travel, relocation
and similar advances to officers, directors and employees (or individuals
acting in similar capacities) made in the ordinary course of business), and
(ii) any ownership or similar interest (in the nature of Capital Stock) held by
such Person in any other Person. The amount of any Investment shall be the
original principal or capital amount thereof less all returns of principal or
equity thereon (and without adjustment by reason of the financial condition of
such other Person) and shall, if made by the transfer or exchange of property
other than cash, be deemed to have been made in an original principal or
capital amount equal to the fair market value of such property at the time of
such transfer or exchange.

     "Issuance Request" means a Letter of Credit request and certificate duly
executed by an Authorized Officer of the Borrower, substantially in the form of
Exhibit B-3 hereto.

     "Issuer" means the Administrative Agent in its capacity as issuer of
Letters of Credit and any Lender as may be designated by the Borrower (and
consented to by the Agents and such Lender, such consent by the Agents not to
be unreasonably withheld) in its capacity as issuer of Letters of Credit.

     "Lead Arranger" means DLJ.

     "Lender Assignment Agreement" means a Lender Assignment Agreement
substantially in the form of Exhibit I hereto.

     "Lenders" is defined in the preamble.

     "Letter of Credit" is defined in Section 2.1.3.

     "Letter of Credit Commitment" means, with respect to any Issuer, such
Issuer's obligation to issue Letters of Credit pursuant to Section 2.1.3 and,
with respect to each of the other Lenders that has a Revolving Loan Commitment,
the obligation of each such Lender to participate in such Letters of Credit
pursuant to Section 2.6.1.

     "Letter of Credit Commitment Amount" means, on any date, a maximum amount
of $15,000,000, as such amount may be reduced from time to time pursuant to
Section 2.2.

     "Letter of Credit Outstandings" means, on any date, an amount equal to the
sum of

          (a) the then aggregate amount which is undrawn and available under
     all issued and outstanding Letters of Credit,





                                      -24-

<PAGE>


plus

          (b) the then aggregate amount of all unpaid and outstanding
     Reimbursement Obligations in respect of such Letters of Credit.

     "Leverage Ratio" means, at the end of any Fiscal Quarter, subject to
clause (b) of Section 1.4, the ratio of

          (a) total Debt less cash and Cash Equivalent Investments of the
     Borrower and its Restricted Subsidiaries on a consolidated basis
     outstanding at such time;

to

          (b) EBITDA for the period of four consecutive Fiscal Quarters ended
     on such date.

     "Leverage Ratio Estimate" is defined in the definition of Applicable
Commitment Fee.

     "LIBO Rate" means, relative to any Interest Period for LIBO Rate Loans,
the applicable London interbank offered rate for deposits in U.S. dollars
appearing on Dow Jones Markets (Telerate Page 3750) as of 11:00 a.m. (London
time) two Business Days prior to the first day of such Interest Period, and
having a maturity equal to such Interest Period; provided that, if Dow Jones
Markets (Telerate Page 3750) is not available for any reason, the applicable
Eurodollar Base Rate for the relevant Interest Period shall instead be the
applicable London interbank offered rate for deposits in U.S. Dollars appearing
on Reuters Screen FRBD as of 11:00 a.m. (London time) two Business Days prior
to the first day of such Interest Period, and having a maturity equal to such
Interest Period.

     "LIBO Rate Loan" means a Loan bearing interest, at all times during an
Interest Period applicable to such Loan, at a fixed rate of interest determined
by reference to the LIBO Rate (Reserve Adjusted).

     "LIBO Rate (Reserve Adjusted)" means, relative to any Loan to be made,
continued or maintained as, or converted into, a LIBO Rate Loan for any
Interest Period, the rate of interest per annum (rounded upwards to the next
1/100th of 1%) determined by the Administrative Agent as follows:

               LIBO Rate           =                 LIBO Rate
                                        -------------------------------
            (Reserve Adjusted)          1.00 - LIBOR Reserve Percentage





                                      -25-

<PAGE>


     The LIBO Rate (Reserve Adjusted) for any Interest Period for LIBO Rate
Loans will be adjusted automatically as to all LIBO Rate Loans then outstanding
as of the effective date of any change in the LIBOR Reserve Percentage.

     "LIBOR Office" means, relative to any Lender, the office of such Lender
designated as such on Schedule II hereto or in the Lender Assignment Agreement
pursuant to which such Lender became a Lender hereunder or such other office of
a Lender as shall be so designated from time to time by notice from such Lender
to the Borrower and the Administrative Agent, which shall be making or
maintaining LIBO Rate Loans of such Lender hereunder.

     "LIBOR Reserve Percentage" means, relative to any Interest Period for LIBO
Rate Loans, the percentage (expressed as a decimal, rounded upward to the next
1/100th of 1%) in effect on such day (whether or not applicable to any Lender)
under regulations issued from time to time by the F.R.S. Board for determining
the maximum reserve requirement (including any emergency, supplemental or other
marginal reserve requirement) with respect to Eurocurrency funding (currently
referred to as "Eurocurrency Liabilities" in Regulation D of the F.R.S. Board).

     "Lien" means any security interest, mortgage, pledge, hypothecation,
assignment, deposit arrangement, encumbrance, lien (statutory or otherwise),
charge against or interest in property, or any filing or recording of any
instrument or document in respect of the foregoing, to secure payment of a debt
or performance of an obligation or any other priority or preferential treatment
of any kind or nature whatsoever that has the practical effect of creating a
security interest in property.

     "Loan" means, as the context may require, a Revolving Loan, a Term-A Loan,
a Term-B Loan or a Swing Line Loan, of any type.

     "Loan Document" means this Agreement, the Notes, the Letters of Credit,
each Rate Protection Agreement under which the counterparty to such agreement
is (or at the time such Rate Protection Agreement was entered into, was) a
Lender or an Affiliate of a Lender relating to Hedging Obligations of the
Borrower or any of its Subsidiaries, each Borrowing Request, each Issuance
Request, the Fee Letter, the Administrative Agent Fee Letter, each Pledge
Agreement, the Subsidiary Guaranty, each Mortgage (upon execution and delivery
thereof), and each other agreement, document or instrument delivered in
connection with this Agreement or any other Loan Document, whether or not
specifically mentioned herein or therein.

     "Material Adverse Effect" means (a) a material adverse effect on the
financial condition, operations, assets, business, properties or prospects of
the Borrower and its Restricted Subsidiaries, taken as a whole, (b) a material
impairment of the ability of the Borrower or any other Obligor to perform its
respective material obligations under the Loan Documents to which it is or will
be a party, or (c) an impairment of the validity or enforceability of, or a
material




                                      -26-

<PAGE>


impairment of the rights, remedies or benefits available to each Issuer, the
Agents, the Lead Arranger or the Lenders under, this Agreement or any other
Loan Document.

     "Material Documents" means the Recapitalization Agreement, the Sierra
Acquisition Agreement, the Charter Documents of each of the Borrower and
Holdco, the Investors' Agreement, Seller Subordinated Discount Note, Senior
Discount Debentures, the Warrants, the Warrant Agreement and the Senior
Subordinated Debt Documents, each as amended, supplemented, amended and
restated or otherwise modified from time to time as permitted in accordance
with the terms hereof or of any other Loan Document.

     "Material Subsidiary" means (i) any direct or indirect Restricted
Subsidiary of the Borrower which holds, owns or contributes, as the case may
be, 3% or more of the gross revenues, assets or EBITDA of the Borrower and its
Restricted Subsidiaries, on a consolidated basis, and (ii) any Restricted
Subsidiary of the Borrower designated by the Borrower as a Material Subsidiary.
The Borrower shall designate one or more Restricted Subsidiaries of the
Borrower as Material Subsidiaries if, in the absence of such designation, the
aggregate gross revenues, assets or EBITDA of all Restricted Subsidiaries of
the Borrower that are not Material Subsidiaries would exceed 5% of the gross
revenues, assets or EBITDA of the Borrower and its Restricted Subsidiaries, on
a consolidated basis.

     "Merger" is defined in the second recital.

     "Moody's" means Moody's Investors Service, Inc.

     "Mortgage" means, collectively, each Mortgage or Deed of Trust executed
and delivered pursuant to the terms of this Agreement, including Section
7.1.8(b) or 7.1.12, in form and substance reasonably satisfactory to the
Agents.

     "Net Debt Proceeds" means with respect to the incurrence, sale or issuance
by Holdco, the Borrower or any Restricted Subsidiary of the Borrower of any
Debt (other than Debt incurred as part of the Transaction and other Debt
permitted by Section 7.2.2 and clause (b)(i) of Section 5.9 of the Holdco
Guaranty and Pledge Agreement) the excess of:

          (a) the gross cash proceeds received by Holdco, the Borrower or any
     such Restricted Subsidiary from such incurrence, sale, or issuance,

over

          (b) the sum (without duplication) of (i) all reasonable and customary
     underwriting commissions and legal, investment banking, brokerage and
     accounting and other professional fees, sales commissions and
     disbursements and all other reasonable




                                      -27-

<PAGE>


     fees, expenses and charges, in each case actually incurred in connection
     with such incurrence, sale or issuance and (ii) in the case of any Debt
     incurred, sold or issued by any Foreign Subsidiary, any taxes or other
     costs or expenses resulting from repatriating any such proceeds to the
     United States.

     "Net Disposition Proceeds" means, with respect to any sale, transfer or
other disposition of any assets of the Borrower or any of its Restricted
Subsidiaries (other than transfers made as part of the Transaction and other
sales permitted pursuant to clause (a), (b), (d) (to the extent the proceeds of
the transfer permitted thereunder constitute Net Casualty Proceeds) or (e) of
Section 7.2.9, but including any sale or issuance of Capital Stock of any such
Subsidiary to any Person other than the Borrower or any of its Restricted
Subsidiaries), the excess of

          (a) the sum of the gross cash proceeds received, directly or
     indirectly, by the Borrower or any of its Restricted Subsidiaries from any
     such sale, transfer or other disposition and any cash payments received in
     respect of promissory notes or other non-cash consideration delivered to
     the Borrower or such Restricted Subsidiary in respect thereof,

less

          (b) the sum (without duplication) of (i) all reasonable and customary
     fees and expenses with respect to legal, investment banking, brokerage,
     accounting and other professional fees, sales commissions and
     disbursements and all other reasonable fees, expenses and charges, in each
     case actually incurred in connection with such sale, transfer or other
     disposition, (ii) all taxes and other governmental costs and expenses
     actually paid or estimated by the Borrower (in good faith) to be payable
     in cash in connection with such sale, transfer or other disposition
     (including, in the event of a transfer, sale or other disposition of
     non-U.S. assets, any such taxes or other costs or expenses resulting from
     repatriating any such proceeds to the United States), (iii) payments made
     by the Borrower or any of its Restricted Subsidiaries to retire
     Indebtedness (other than the Loans) of the Borrower or any of its
     Restricted Subsidiaries where payment of such Indebtedness is required in
     connection with such sale, transfer or other disposition and (iv) reserves
     for purchase price adjustments and retained fixed liabilities reasonably
     expected to be payable by the Borrower and its Restricted Subsidiaries in
     cash in connection therewith;

provided, however, that if, after the payment of all taxes, purchase price
adjustments and retained fixed liabilities with respect to such sale, transfer
or other disposition, the amount of estimated taxes, purchase price adjustments
or retained fixed liabilities, if any, pursuant to clause (b)(ii) or (b)(iv)
above exceeded the tax, purchase price adjustment or retained fixed liabilities
amount actually paid in cash in respect of such sale, transfer or other
disposition, the aggregate amount of such excess shall, at such time,
constitute Net Disposition Proceeds.




                                      -28-

<PAGE>


     "Net Equity Proceeds" means with respect to any sale or issuance by Holdco
or the Borrower to any Person of any Capital Stock of Holdco or the Borrower,
as the case may be, or any warrants or options with respect to any such Capital
Stock or the exercise of any such warrants or options after the Closing Date
(exclusive of any such proceeds constituting Excluded Equity Proceeds) the
excess of:

          (a) the gross cash proceeds received by Holdco or the Borrower from
     such sale, exercise or issuance,

over

          (b) the sum, without duplication, of all reasonable and customary
     underwriting commissions and legal, investment banking, brokerage,
     accounting and other professional fees, sales commissions and
     disbursements and all other reasonable fees, expenses and charges, in each
     case actually incurred in connection with such sale or issuance.

     "Net Income" means, for any period, the net income of the Borrower and its
Subsidiaries for such period on a consolidated basis, excluding (a) net losses
or gains realized in connection with any sale, lease, conveyance or other
disposition of any asset (other than in the ordinary course of business) and
(b) extraordinary or non-recurring losses or gains; provided, however, that the
Net Income or loss of any Person that is not a Restricted Subsidiary or that is
accounted for by the equity method of accounting shall be included only to the
extent of the amount of dividends or distributions paid to the Borrower or a
Restricted Subsidiary in cash.

     "Non-Consenting Lender" means any Lender that, in response to any request
by the Borrower or any Agent to a departure from, waiver of or amendment to any
provision of any Loan Document that requires the agreement of all Lenders or
all Lenders with respect to a particular Tranche, which departure, waiver or
amendment receives the consent of the Required Lenders or the holders of a
majority of the Commitments or (if the applicable Commitments in respect of
such Tranche shall have expired or been terminated) outstanding Credit
Extensions in respect of such Tranche, as the case may be, shall not have given
its consent to such departure, waiver or amendment.

     "Non-Funding Lender" means a Lender that shall have failed to fund any
Loan hereunder that it was required to have funded in accordance with the terms
hereof, which Loan was included in any Borrowing in respect of which a majority
of the aggregate principal amount of all Loans included in such Borrowing were
funded by the Lenders party thereto.

     "Non-Recourse Debt" means Indebtedness (i) no default with respect to
which (including any rights that the holders thereof may have to take
enforcement action against an Unrestricted Subsidiary) would permit (upon
notice, lapse of time or both) any holder of any other




                                      -29-

<PAGE>


Indebtedness of the Borrower or any of its Restricted Subsidiaries to declare a
default on such other Indebtedness or cause the payment thereof to be
accelerated or payable prior to its stated maturity, and (ii) as to which the
lenders have been notified in writing that they will not have any recourse to
the Capital Stock or assets of the Borrower or any of its Restricted
Subsidiaries (other than Capital Stock of Unrestricted Subsidiaries pledged by
the Borrower or a Restricted Subsidiary to secure Debt of such Unrestricted
Subsidiary); provided, however, that in no event shall Indebtedness of any
Unrestricted Subsidiary fail to be Non-Recourse Debt solely as a result of any
default provisions contained in a guarantee thereof by the Borrower or any of
its Restricted Subsidiaries if the Borrower or such Restricted Subsidiary was
otherwise permitted to incur such guarantee under this Agreement.

     "Non-U.S. Lender" means any Lender (including each Assignee Lender) that
is not (i) a citizen or resident of the United States, (ii) a corporation,
partnership or other entity created or organized in or under the laws of the
United States or any state thereof, or (iii) an estate or trust that is subject
to U.S. Federal income taxation regardless of the source of its income.

     "Note" means, as the context may require, a Revolving Note, a Term-A Note,
a Term-B Note or a Swing Line Note.

     "Obligations" means all obligations (monetary or otherwise) of the
Borrower and each other Obligor arising under or in connection with this
Agreement and each other Loan Document.

     "Obligor" means the Borrower or any other Person (other than any Agent,
the Lead Arranger, any Issuer, the Swing Line Lender or any Lender) obligated
under any Loan Document.

     "Other Asset Contributors" is defined in the second recital.

     "Participant" is defined in Section 10.11.2.

     "PBGC" means the Pension Benefit Guaranty Corporation and any successor
entity.

     "Pension Plan" means a "pension plan", as such term is defined in Section
3(2) of ERISA, which is subject to Title IV of ERISA (other than a
multiemployer plan as defined in Section 4001(a)(3) of ERISA), and to which the
Borrower or any corporation, trade or business that is, along with the
Borrower, a member of a Controlled Group, has or within the prior six years has
had any liability, including any liability by reason of having been a
substantial employer within the meaning of Section 4063 of ERISA at any time
during the preceding five years, or by reason of being deemed to be a
contributing sponsor under Section 4069 of ERISA.





                                      -30-

<PAGE>


     "Percentage" means, relative to any Lender, the applicable percentage
relating to Term-A Loans, Term-B Loans or Revolving Loans, as the case may be,
as set forth opposite its name in Schedule II hereto or in a Lender Assignment
Agreement(s) under the applicable column heading, as such percentage may be
adjusted from time to time pursuant to Lender Assignment Agreement(s) executed
by such Lender and its Assignee Lender(s) and delivered pursuant to Section
10.11 or, in the case of a Lender's Percentage relating to Revolving Loans,
pursuant to clause (c) of Section 2.1.2. A Lender shall not have any Commitment
to make Revolving Loans, Term-A Loans or Term-B Loans (as the case may be) if
its percentage under the respective column heading is zero.

     "Person" means any natural person, corporation, partnership, firm,
association, trust, government, governmental agency, limited liability company
or any other entity, whether acting in an individual, fiduciary or other
capacity.

     "Plan" means any Pension Plan or Welfare Plan.

     "Pledge Agreement" means, as the context may require, the Borrower Pledge
and Security Agreement, the Holdco Guaranty and Pledge Agreement or the
Subsidiary Pledge and Security Agreement.

     "Pledge and Security Agreement" means, as the context may require, the
Borrower Pledge and Security Agreement or the Subsidiary Pledge and Security
Agreement.

     "Pro Forma Financial Statements" is defined in clause (b) of Section
5.1.9.

     "Public Offering" means, for any Person, any sale after the Closing Date
of the Capital Stock of such Person to the public pursuant to a primary
offering registered under the Securities Act of 1933, as amended.

     "Quarterly Payment Date" means the last day of each of March, June,
September and December, or, if any such day is not a Business Day, the next
succeeding Business Day, commencing with December 31, 1999.

     "Rate Protection Agreement" means any interest rate swap, cap, collar or
similar agreement entered into by the Borrower pursuant to the terms of this
Agreement under which the counterparty to such agreement is (or at the time
such Rate Protection Agreement was entered into, was) a Lender or an Affiliate
of a Lender.

     "Recapitalization Agreement" is defined in the first recital.

     "Refunded Swing Line Loans" is defined in clause (b) of Section 2.3.2.




                                      -31-

<PAGE>


     "Register" is defined in clause (b) of Section 2.7.

     "Reimbursement Obligation" is defined in Section 2.6.3.

     "Reinstatement Date" is defined in Section 4.1.

     "Related Fund" means, with respect to any Lender that is a fund that
invests in commercial loans, any other fund that invests in commercial loans
and is managed or advised by the same investment advisor as such Lender or by
an Affiliate of such investment advisor.

     "Release" means a "release", as such term is defined in CERCLA.

     "Replacement Lender" is defined in Section 4.11.

     "Replacement Notice" is defined in Section 4.11.

     "Required Lenders" means, at any time, (i) prior to the date of the making
of the initial Credit Extension hereunder, Lenders having at least 51% of the
sum of the Revolving Loan Commitments, Term-A Loan Commitments and Term-B Loan
Commitments, and (ii) on and after the date of the initial Credit Extension,
Lenders holding at least 51% of the Total Exposure Amount.

     "Resource Conservation and Recovery Act" means the Resource Conservation
and Recovery Act, 42 U.S.C. Section 6901, et seq., as in effect from time to
time.

     "Restricted Payments" is defined in Section 7.2.6.

     "Restricted Payments Compliance Certificate" means a certificate duly
completed and executed by an Authorized Officer that is the president, the
chief executive officer or the chief financial or accounting officer of the
Borrower, substantially in the form of Exhibit F hereto.

     "Restricted Subsidiary" means any Subsidiary of the Borrower that is not
an Unrestricted Subsidiary.

     "Revolving Loans" is defined in Section 2.1.2.

     "Revolving Loan Commitment" is defined in Section 2.1.2.

     "Revolving Loan Commitment Amount" means, on any date, $30,000,000, as
such amount may be increased from time to time pursuant to clause (c) of
Section 2.1.2 or reduced from time to time pursuant to Section 2.2.




                                      -32-

<PAGE>


     "Revolving Loan Commitment Termination Date" means the earliest of (i)
September 29, 1999 if the Term Loans have not been made on or prior to such
date, (ii) the sixth anniversary of the Closing Date, (iii) the date on which
the Revolving Loan Commitment Amount is terminated in full or reduced to zero
pursuant to Section 2.2, and (iv) the date on which any Commitment Termination
Event occurs.

     "Revolving Note" means a promissory note of the Borrower payable to any
Lender, substantially in the form of Exhibit A-1 hereto (as such promissory
note may be amended, endorsed or otherwise modified from time to time),
evidencing the aggregate Indebtedness of the Borrower to such Lender resulting
from outstanding Revolving Loans, and also means all other promissory notes
accepted from time to time in substitution therefor or renewal thereof.

     "Rollover Equity" means the shares equal to approximately 12.5% of Holdco
outstanding after the Merger which will either be retained by CRL or exchanged
by CRL for such percentage of a new class of shares of common stock of Holdco.

     "S&P" means Standard & Poor's Ratings Group, a division of McGraw Hill,
Inc.

     "SBI" is defined in the fourth recital.

     "Secured Parties" means, collectively, the Lenders, the Issuers, the
Agents and each counterparty to a Rate Protection Agreement that is (or at the
time such Rate Protection Agreement was entered into, was) a Lender or an
Affiliate of a Lender.

     "Seller Note Issuance" is defined in clause (d) of the fifth recital.

     "Seller Subordinated Discount Note" means the Subordinated Discount Note
in an initial principal amount of $43,000,000 issued by Holdco to CRL on the
Closing Date.

     "Senior Discount Debentures" the Senior Discount Debentures in an initial
principal amount of $40,000,000 issued by Holdco on the Closing Date.

     "Senior Subordinated Debt" means the Senior Subordinated Notes.

     "Senior Subordinated Debt Documents" means the Senior Subordinated Notes
and all other instruments, agreements or other documents evidencing or
governing any Senior Subordinated Debt or pursuant to which any Senior
Subordinated Debt has been issued.

     "Senior Subordinated Notes" is defined in clause (a) of the fifth recital.

     "Sierra Acquisition" is defined in the fourth recital.




                                      -33-

<PAGE>


     "Sierra Acquisition Agreement" is defined in the fourth recital.

     "Solvent" means, with respect to any Person on a particular date, that on
such date (a) the fair value of the property of such Person is greater than the
total amount of liabilities, including contingent liabilities, of such Person,
(b) the present fair salable value of the assets of such Person is not less
than the amount that will be required to pay the probable liability of such
Person on its debts as they become absolute and matured, (c) such Person does
not intend to, and does not believe that it will, incur debts or liabilities
beyond such Person's ability to pay as such debts and liabilities mature, and
(d) such Person is not engaged in business or a transaction, and such Person is
not about to engage in business or a transaction, for which such Person's
property would constitute an unreasonably small capital. The amount of
contingent liabilities at any time shall be computed as the amount that, in
light of all the facts and circumstances existing at such time, can reasonably
be expected to become an actual or matured liability.

     "Stated Amount" of each Letter of Credit means the total amount available
to be drawn under such Letter of Credit upon the issuance thereof.

     "Stated Expiry Date" is defined in Section 2.6.

     "Stated Maturity Date" means (i) in the case of any Revolving Loan, the
sixth anniversary of the Closing Date, (ii) in the case of any Term-A Loan, the
sixth anniversary of the Closing Date, (iii) in the case of any Term-B Loan,
the eighth anniversary of the Closing Date or, in the case of any such day that
is not a Business Day, the first Business Day following such day.

     "Subject Lender" is defined in Section 4.11.

     "Subco Dividend" is defined in the second recital.

     "Subordinated Debt Issuance" is defined in clause (a) of the fifth
recital.

     "Subordination Provisions" is defined in Section 8.1.11.

     "Subsidiary" means, with respect to any Person, any corporation,
partnership or other business entity of which more than 50% of the outstanding
Capital Stock (or other ownership interest) having ordinary voting power to
elect a majority of the board of directors, managers or other voting members of
the governing body of such entity (irrespective of whether at the time Capital
Stock (or other ownership interests) of any other class or classes of such
entity shall or might have voting power upon the occurrence of any contingency)
is at the time directly or indirectly owned by such Person, by such Person and
one or more other Subsidiaries of such Person, or by one or more other
Subsidiaries of such Person. For purposes of this Agreement




                                      -34-

<PAGE>



and the other Loan Documents, any Acquired Controlled Person shall be deemed to
be a "Subsidiary" of the Borrower for purposes of Sections 6.1, 6.7, 6.9, 6.10,
6.11, 6.12, 7.1.2, 7.1.3, 7.1.4, 7.1.5, 7.1.6, 7.1.7(a)(ii), 7.2.1, 7.2.2,
7.2.3, 7.2.5, 7.2.6, 7.2.9, 7.2.11, 7.2.12 and 7.2.14 and, to the extent (and
only to the extent) that it relates to any of the foregoing Sections, Article
VIII.

     "Subsidiary Guarantor" means each U.S. Subsidiary of the Borrower that has
executed and delivered a Subsidiary Guaranty (or a supplement thereto).

     "Subsidiary Guaranty" means the Guaranty, if any, executed and delivered
by an Authorized Officer of a Subsidiary Guarantor pursuant to Section 5.1.6 or
Section 7.1.7, substantially in the form of Exhibit H hereto, as amended,
supplemented, amended and restated or otherwise modified from time to time.

     "Subsidiary Pledge and Security Agreement" means the Pledge and Security
Agreement executed and delivered by an Authorized Officer of each Subsidiary
Guarantor pursuant to the terms of this Agreement, substantially in the form of
Exhibit G-3 hereto, together with any supplemental Foreign Pledge Agreements
delivered pursuant to the terms of this Agreement, in each case as amended,
supplemented, amended and restated or otherwise modified from time to time.

     "Swing Line Lender" means the Administrative Agent in its capacity as
Swing Line Lender hereunder.

     "Swing Line Loan" is defined in clause (b) of Section 2.1.2.

     "Swing Line Loan Commitment" is defined in clause (b) of Section 2.1.2.

     "Swing Line Loan Commitment Amount" means, on any date, $5,000,000, as
such amount may be reduced from time to time pursuant to Section 2.2.

     "Swing Line Note" means a promissory note of the Borrower payable to the
Swing Line Lender, in the form of Exhibit A-4 hereto (as such promissory note
may be amended, endorsed or otherwise modified from time to time), evidencing
the aggregate Indebtedness of the Borrower to the Swing Line Lender resulting
from outstanding Swing Line Loans, and also means all other promissory notes
accepted from time to time in substitution therefor or renewal thereof.

     "Syndication Agent" is defined in the preamble.

     "Taxes" is defined in Section 4.6.





                                      -35-

<PAGE>


     "Term-A Loans" is defined in clause (a) of Section 2.1.1.

     "Term-A Loan Commitment" is defined in clause (a) of Section 2.1.1.

     "Term-A Loan Commitment Amount" means $40,000,000.

     "Term-A Loan Commitment Termination Date" means the earliest of (i)
September 29, 1999, if the Term-A Loans have not been made on or prior to such
date, (ii) the Closing Date (immediately after the making of the Term-A Loans
on such date), and (iii) the date on which any Commitment Termination Event
occurs.

     "Term-A Note" means a promissory note of the Borrower payable to the order
of any Lender, in the form of Exhibit A-2 hereto (as such promissory note may
be amended, endorsed or otherwise modified from time to time), evidencing the
aggregate Indebtedness of the Borrower to such Lender resulting from
outstanding Term-A Loans, and also means all other promissory notes accepted
from time to time in substitution therefor or renewal thereof.

     "Term-B Loans" is defined in clause (b) of Section 2.1.1.

     "Term-B Loan Commitment" is defined in clause (b) of Section 2.1.1.

     "Term-B Loan Commitment Amount" means $120,000,000.

     "Term-B Loan Commitment Termination Date" means the earliest of (i)
September 29, 1999, if the Term-B Loans have not been made on or prior to such
date, (ii) the Closing Date (immediately after the making of the Term-B Loans
on such date), and (iii) the date on which any Commitment Termination Event
occurs.

     "Term-B Note" means a promissory note of the Borrower payable to the order
of any Lender, in the form of Exhibit A-3 hereto (as such promissory note may
be amended, endorsed or otherwise modified from time to time), evidencing the
aggregate Indebtedness of the Borrower to such Lender resulting from
outstanding Term-B Loans, and also means all other promissory notes accepted
from time to time in substitution therefor or renewal thereof.

     "Term Loan Commitment Termination Date" means, as the context may require,
the Term-A Loan Commitment Termination Date or the Term-B Loan Commitment
Termination Date.

     "Term Loans" means collectively, the Term-A Loans or the Term-B Loans.





                                      -36-

<PAGE>


     "Termination Date" means the date on which all Obligations have been paid
in full in cash, all Letters of Credit have been terminated, expired or Cash
Collateralized, all Rate Protection Agreements have been terminated and all
Commitments shall have terminated.

     "Total Exposure Amount" means, on any date of determination, (a) with
respect to any provision of this Agreement other than the declaration of the
acceleration of the maturity of all or any portion of the outstanding principal
amount of the Loans and other Obligations to be due and payable pursuant to
Section 8.3, the sum of (i) the aggregate principal amount of all Term Loans
outstanding at such time and (ii) (x) the then effective Revolving Loan
Commitment Amount, if there are any Revolving Loan Commitments then
outstanding, or (y) if all Revolving Loan Commitments shall have expired or
been terminated, the sum of (1) the aggregate principal amount of all Revolving
Loans and Swing Line Loans outstanding at such time and (2) the Letter of
Credit Outstandings at such time; and (b) with respect to the declaration of
the acceleration of the maturity of all or any portion of the outstanding
principal amount of the Loans and other Obligations to be due and payable
pursuant to Section 8.3, the sum of (i) the aggregate principal amount of all
Loans outstanding at such time and (ii) the Letter of Credit Outstandings at
such time.

     "Tranche" means, as the context may require, the Loans constituting Term-A
Loans, Term-B Loans, Revolving Loans or Swing Line Loans.

     "Transaction" is defined in the second recital.

     "Transaction Documents" means each of the Material Documents and all other
agreements, documents, instruments, certificates, filings, consents, approvals,
board of directors resolutions and opinions furnished pursuant to or in
connection with the Recapitalization, Merger, Equity Contributions, Subco
Dividend, Subordinated Debt Issuance, Discount Debentures Issuance, the Seller
Note Issuance and the Sierra Acquisition and the transactions contemplated
hereby or thereby, each as amended, supplemented, amended and restated or
otherwise modified from time to time as permitted in accordance with the terms
hereof or of any other Loan Document.

     "Transaction Payments" means the retention bonus payments, performance
bonus payments, Earn-outs and any fees, expenses and financing and other
transaction costs to be paid by the Borrower under any present or future
acquisition agreement.

     "type" means, relative to any Loan, the portion thereof, if any, being
maintained as a Base Rate Loan or a LIBO Rate Loan.

     "UBOC" is defined in the preamble.





                                      -37-

<PAGE>


     "UCC" means the Uniform Commercial Code as in effect from time to time in
the State of New York; provided, that if, with respect to any Filing Statement
or by reason of any mandatory provisions of law, the perfection or the effect
of perfection or non-perfection of the security interests granted to the
Administrative Agent pursuant to the applicable Loan Document is governed by
the Uniform Commercial Code as in effect in a jurisdiction of the United States
other than New York, UCC means the Uniform Commercial Code as in effect from
time to time in such other jurisdiction for purposes of the provisions of this
Agreement, each Loan Document and any Filing Statement relating to such
perfection or effect of perfection or non-perfection.

     "United States" or "U.S." means the United States of America, its fifty
states and the District of Columbia.

     "U.S. Subsidiary" means any Subsidiary of the Borrower that is
incorporated or organized in or under the laws of the United States, any state
thereof or the District of Columbia.

     "Unrestricted Subsidiary" means any Subsidiary of the Borrower that is
designated by a resolution of the Board of Directors of the Borrower as an
Unrestricted Subsidiary, but only to the extent that such Subsidiary: (i) has
no Indebtedness other than Non-Recourse Debt; (ii) is not party to any
agreement, contract, arrangement or understanding with the Borrower or any
Restricted Subsidiary of the Borrower unless the terms of any such agreement,
contract, arrangement or understanding are no less favorable to the Borrower or
such Restricted Subsidiary than those that might be obtained at the time from
Persons who are not Affiliates of the Borrower; (iii) is a Person with respect
to which neither the Borrower nor any of its Restricted Subsidiaries has any
direct or indirect obligation (a) to subscribe for additional Capital Stock or
warrants, options or other rights to acquire Capital Stock or (b) to maintain
or preserve such Person's financial condition or to cause such Person to
achieve any specified levels of operating results; and (iv) has not guaranteed
or otherwise directly or indirectly provided credit support for any
Indebtedness of the Borrower or any of its Restricted Subsidiaries. If, at any
time, any Unrestricted Subsidiary would fail to meet the foregoing requirements
as an Unrestricted Subsidiary, it shall thereafter cease to be an Unrestricted
Subsidiary for purposes hereof. The Board of Directors of the Borrower may at
any time designate any Unrestricted Subsidiary to be a Restricted Subsidiary;
provided that such designation shall be deemed to be an incurrence of
Indebtedness by a Restricted Subsidiary of the Borrower of any outstanding
Indebtedness of such Unrestricted Subsidiary and such designation shall only be
permitted if no Default or Event of Default would be in existence following
such designation.

     "Voting Stock" means any class or classes of Capital Stock pursuant to
which the holders thereof have the general voting power under ordinary
circumstances to elect at least a majority of the board of directors, managers
or trustees (or Persons performing similar functions) of any Person
(irrespective of whether or not, at the time, Capital Stock of any other class
or classes shall have, or might have, voting power by reason of the happening
of any contingency).





                                      -38-

<PAGE>


     "Waiver" means an agreement in favor of the Agents for the benefit of the
Lenders in form and substance reasonably satisfactory to the Agents.

     "Warrants" is defined in clause (a) of the fifth recital.

     "Warrant Agreement" is defined in clause (a) of the fifth recital.

     "Welfare Plan" means a "welfare plan", as such term is defined in Section
3(1) of ERISA, and to which the Borrower has any liability.

     "wholly-owned Subsidiary" means, with respect to any Person, any
Subsidiary of such Person all of the Capital Stock (and all rights and options
to purchase such Capital Stock) of which, other than directors' qualifying
shares, are owned, beneficially and of record, by such Person and/or one or
more wholly-owned Subsidiaries of such Person.

     SECTION 1.2. Use of Defined Terms. Unless otherwise defined or the context
otherwise requires, terms for which meanings are provided in this Agreement
shall have such meanings when used in the Disclosure Schedule and in each other
Loan Document, notice and other communication delivered from time to time in
connection with this Agreement or any other Loan Document.

     SECTION 1.3. Cross-References. Unless otherwise specified, references in
this Agreement and in each other Loan Document to any Article or Section are
references to such Article or Section of this Agreement or such other Loan
Document, as the case may be, and, unless otherwise specified, references in
any Article, Section or definition to any clause are references to such clause
of such Article, Section or definition.

     SECTION 1.4. Accounting and Financial Determinations.

          (a) Unless otherwise specified and subject to Section 1.4(b) below,
     all accounting terms used herein or in any other Loan Document shall be
     interpreted, all accounting determinations and computations hereunder or
     thereunder (including under Section 7.2.4) shall be made, and all
     financial statements required to be delivered hereunder or thereunder
     shall be prepared in accordance with, those generally accepted accounting
     principles ("GAAP"), as in effect on December 31, 1998 and, unless
     otherwise expressly provided herein, shall be computed or determined on a
     consolidated basis and without duplication.

          (b) For purposes of computing the Fixed Charge Coverage Ratio,
     Interest Coverage Ratio and Leverage Ratio (and any financial calculations
     required to be made or included within such ratios) as of the end of any
     Fiscal Quarter, all components of such ratios, including Capital
     Expenditures, in the case of any disposition, but excluding




                                      -39-

<PAGE>



     Capital Expenditures, in the case of any acquisition, for the period of
     four Fiscal Quarters ending at the end of such Fiscal Quarter shall
     include or exclude, as the case may be, without duplication, such
     components of such ratios attributable to any business or assets that have
     been acquired or disposed of by the Borrower or any of its Subsidiaries
     (including through mergers or consolidations) after the first day of such
     period of four Fiscal Quarters and prior to the end of such period, as
     determined in good faith by the Borrower on a pro forma basis for such
     period of four Fiscal Quarters as if such acquisition or disposition had
     occurred on such first day of such period (including cost savings that
     would have been realized had such acquisition occurred on such day and
     which inclusion when not otherwise permitted under GAAP has been approved
     by a majority of the board of directors of Holdco).

                                   ARTICLE II

                COMMITMENTS, BORROWING AND ISSUANCE PROCEDURES,
                          NOTES AND LETTERS OF CREDIT

     SECTION 2.1. Commitments. On the terms and subject to the conditions of
this Agreement (including Sections 2.1.4, 2.1.5 and Article V),

          (a) each Lender severally agrees to make Loans (other than Swing Line
     Loans) pursuant to each of its Commitments and the Swing Line Lender
     agrees to make Swing Line Loans pursuant to the Swing Line Loan
     Commitment, in each case as described in this Section 2.1; and

          (b) each Issuer severally agrees that it will issue Letters of Credit
     pursuant to Section 2.1.3, and each other Lender that has a Revolving Loan
     Commitment severally agrees that it will purchase participation interests
     in such Letters of Credit pursuant to Section 2.6.1.

     SECTION 2.1.2. Term Loan Commitments. Subject to compliance by the
Borrower with the terms of Sections 2.1.4, 5.1 and 5.2, on (but solely on) the
Closing Date (which shall be a Business Day), each Lender that has a Percentage
in excess of zero of the Term-A Loan Commitment or the Term-B Loan Commitment,
as applicable,

          (a) will make a loan (relative to such Lender, its "Term-A Loans") to
     the Borrower equal to such Lender's Percentage of the aggregate amount of
     the Borrowing or Borrowings of Term-A Loans requested by the Borrower to
     be made on the Closing Date (with the commitment of each such Lender
     described in this clause (a) herein referred to as its "Term-A Loan
     Commitment") and





                                      -40-

<PAGE>


          (b) will make a loan (relative to such Lender, its "Term-B Loans") to
     the Borrower equal to such Lender's Percentage of the aggregate amount of
     the Borrowing or Borrowings of Term-B Loans requested by the Borrower to
     be made on the Closing Date (with the commitment of each such Lender
     described in this clause (b) herein referred to as its "Term-B Loan
     Commitment").

No amounts paid or prepaid with respect to Term-A Loans or Term-B Loans may be
reborrowed.

     SECTION 2.1.3. Revolving Loan Commitment and Swing Line Loan Commitment.
Subject to compliance by the Borrower with the terms of Section 2.1.4, Section
5.1 and Section 5.2, from time to time on any Business Day occurring
concurrently with (or after) the making of the Term Loans but prior to the
Revolving Loan Commitment Termination Date,

          (a) each Lender that has a Percentage of the Revolving Loan
     Commitment in excess of zero will make loans (relative to such Lender, its
     "Revolving Loans") to the Borrower equal to such Lender's Percentage of
     the aggregate amount of the Borrowing or Borrowings of Revolving Loans
     requested by the Borrower to be made on such day. The Commitment of each
     Lender described in this Section 2.1.2 is herein referred to as its
     "Revolving Loan Commitment". On the terms and subject to the conditions
     hereof, the Borrower may from time to time borrow, prepay and reborrow
     Revolving Loans.

          (b) the Swing Line Lender will make a loan (a "Swing Line Loan") to
     the Borrower equal to the principal amount of the Swing Line Loan
     requested by the Borrower to be made on such day. The Commitment of the
     Swing Line Lender described in this clause (b) is herein referred to as
     its "Swing Line Loan Commitment". On the terms and subject to the
     conditions hereof, the Borrower may from time to time borrow, prepay and
     reborrow Swing Line Loans.

          (c) At any time that no Default has occurred and is continuing, and
     prior to the Revolving Loan Commitment Termination Date, the Borrower may
     notify the Agents that the Borrower is requesting that, on the terms and
     subject to the conditions contained in this Agreement, the Lenders and/or
     other lenders not then a party to this Agreement provide up to an
     aggregate amount of $25,000,000 in additional Revolving Loan Commitments.
     Upon receipt of such notice, the Syndication Agent shall use commercially
     reasonable efforts to arrange for the Lenders or other Eligible
     Institutions to provide such additional Revolving Loan Commitments;
     provided that the Syndication Agent will first offer each of the Lenders
     that then has a Percentage of the Revolving Loan Commitment a pro rata
     portion of any such additional Revolving Loan Commitment. Alternatively,
     DLJ may commit to provide the full amount of the requested additional
     Revolving Loan Commitment and then offer portions of such additional
     Revolving Loan Commitment to the Lenders or other Eligible Institutions,
     subject to the proviso to the immediately preceding sentence. Nothing
     contained in this




                                      -41-

<PAGE>


     clause (c) or otherwise in this Agreement is intended to commit any Lender
     or any Agent to provide any portion of any such additional Revolving Loan
     Commitments. If and to the extent that any Lenders and/or other lenders
     agree, in their sole discretion, to provide any such additional Revolving
     Loan Commitments, (i) the Revolving Loan Commitment Amount shall be
     increased by the amount of the additional Revolving Loan Commitments
     agreed to be so provided, (ii) the Percentages of the respective Lenders
     in respect of the Revolving Loan Commitment shall be proportionally
     adjusted (provided that the Percentage of each Lender shall not be
     increased without the consent of such Lender), (iii) at such time and in
     such manner as the Borrower and the Syndication Agent shall agree (it
     being understood that the Borrower and the Agents will use commercially
     reasonable efforts to avoid the prepayment or assignment of any LIBO Rate
     Loan on a day other than the last day of the Interest Period applicable
     thereto), the Lenders shall assign and assume outstanding Revolving Loans
     and participations in outstanding Letters of Credit so as to cause the
     amounts of such Revolving Loans and participations in Letters of Credit
     held by each Lender to conform to the respective Percentages of the
     Revolving Loan Commitment of the Lenders and (iv) the Borrower shall
     execute and deliver any additional Notes or other amendments or
     modifications to this Agreement or any other Loan Document as the Agents
     may reasonably request.

     SECTION 2.1.4. Letter of Credit Commitment. Subject to compliance by the
Borrower with the terms of Section 2.1.5, 5.1 and 5.2, from time to time on any
Business Day occurring concurrently with (or after) the Closing Date but prior
to the Revolving Loan Commitment Termination Date, the applicable Issuer will
(i) issue one or more standby or commercial letters of credit (each referred to
as a "Letter of Credit") for the account of the Borrower or any of its
Restricted Subsidiaries in the Stated Amount requested by the Borrower on such
day, or (ii) extend the Stated Expiry Date of an existing standby or commercial
Letter of Credit previously issued hereunder to a date not later than the
earlier of (x) the sixth anniversary of the Closing Date and (y) one year from
the date of such extension (subject to automatic renewal provisions); provided
that, notwithstanding the terms of this clause (y), a Letter of Credit may, if
required by the beneficiary thereof, contain automatic renewal provisions
pursuant to which the Stated Expiry Date shall be automatically extended (to a
date not beyond the date specified in clause (x) above), unless notice to the
contrary shall have been given to the beneficiary prior to the then existing
Stated Expiry Date in accordance with the terms specified in such Letter of
Credit by the applicable Issuer or the account party of such Letter of Credit
(which notice by the account party shall also have been provided to the
applicable Issuer in writing).

     SECTION 2.1.5. Lenders Not Permitted or Required to Make the Loans. No
Lender shall be permitted or required to, and the Borrower shall not request
any Lender to, make

          (a) any Term-A Loan or Term-B Loan (as the case may be) if, after
     giving effect thereto, the aggregate original principal amount of all the
     Term-A Loans or Term-B Loans (as the case may be) of such Lender would
     exceed such Lender's Percentage of the




                                      -42-

<PAGE>


     Term-A Loan Commitment Amount (in the case of Term-A Loans) or the Term-B
     Loan Commitment Amount (in the case of Term-B Loans);

          (b) any Revolving Loan if, after giving effect thereto, the aggregate
     outstanding principal amount of all the Revolving Loans (i) of all the
     Lenders with Revolving Loan Commitments, together with the Letter of
     Credit Outstandings and the aggregate outstanding principal amount of all
     Swing Line Loans, would exceed the then existing Revolving Loan Commitment
     Amount, or (ii) of such Lender, together with such Lender's Percentage of
     the aggregate amount of all Letter of Credit Outstandings, and such
     Lender's Percentage of the outstanding principal amount of all Swing Line
     Loans, would exceed such Lender's Percentage of the then existing
     Revolving Loan Commitment Amount.

          (c) any Swing Line Loan if, after giving effect thereto (i) the
     aggregate outstanding principal amount of all Swing Line Loans would
     exceed the Swing Line Loan Commitment Amount or (ii) the sum of the
     aggregate amount of all Letter of Credit Outstandings plus the aggregate
     principal amount of all Revolving Loans and Swing Line Loans then
     outstanding would exceed the then existing Revolving Loan Commitment
     Amount.

     SECTION 2.1.6. Issuer Not Permitted or Required to Issue Letters of
Credit. No Issuer shall be permitted or required to issue any Letter of Credit
if, after giving effect thereto, (a) the aggregate amount of all Letter of
Credit Outstandings would exceed the Letter of Credit Commitment Amount or (b)
the sum of the aggregate amount of all Letter of Credit Outstandings plus the
aggregate principal amount of all Revolving Loans and Swing Line Loans then
outstanding would exceed the then existing Revolving Loan Commitment Amount.

     SECTION 2.2. Reduction of Revolving Loan Commitment Amount. The Borrower
may, from time to time on any Business Day occurring after the time of the
initial Credit Extension hereunder, voluntarily reduce the Revolving Loan
Commitment Amount; provided, however, that all such reductions shall require at
least three Business Days' prior notice to the Administrative Agent and be
permanent, and any partial reduction of any Commitment Amount shall be in an
aggregate amount of $500,000 or any larger integral multiple of $100,000. Any
such reduction of the Revolving Loan Commitment Amount which reduces the
Revolving Loan Commitment Amount below the Letter of Credit Commitment Amount
or the Swing Line Loan Commitment Amount shall result in an automatic and
corresponding reduction of the Letter of Credit Commitment Amount or the Swing
Line Loan Commitment Amount, as the case may be, to an aggregate amount not in
excess of the Revolving Loan Commitment Amount, as so reduced, without any
further action on the part of the applicable Issuer or the Swing Line Lender.





                                      -43-

<PAGE>


     SECTION 2.3. Borrowing Procedures and Funding Maintenance. Loans (other
than Swing Line Loans) shall be made by the Lenders in accordance with Section
2.3.1, and Swing Line Loans shall be made by the Swing Line Lender in
accordance with Section 2.3.2.

     SECTION 2.3.1. Term Loans and Revolving Loans. By delivering a Borrowing
Request to the Administrative Agent on or before 12:00 p.m. (noon), Los Angeles
time, on a Business Day, the Borrower may from time to time irrevocably
request, on not less than one Business Day's notice (in the case of Base Rate
Loans) or three Business Days' notice (in the case of LIBO Rate Loans) nor more
than five Business Days' notice (in the case of any Loans), that a Borrowing be
made in an aggregate amount of $500,000 or any larger integral multiple of
$100,000, or in the unused amount of the applicable Commitment. No Borrowing
Request shall be required, and the minimum aggregate amounts specified under
this Section 2.3.1 shall not apply, in the case of Revolving Loans made under
clause (b) of Section 2.3.2 to refund Refunded Swing Line Loans or Revolving
Loans deemed made under Section 2.6.2 in respect of unreimbursed Disbursements.
On the terms and subject to the conditions of this Agreement, each Borrowing
shall be comprised of the type of Loans, and shall be made on the Business Day,
specified in such Borrowing Request. On or before 1:00 p.m., Los Angeles time,
on such Business Day each Lender shall deposit with the Administrative Agent
same day funds in an amount equal to such Lender's Percentage of the requested
Borrowing. Such deposit will be made to an account which the Administrative
Agent shall specify from time to time by notice to the Lenders. To the extent
funds are received from the Lenders, the Administrative Agent shall make such
funds available to the Borrower by wire transfer to the accounts the Borrower
shall have specified in its Borrowing Request. No Lender's obligation to make
any Loan shall be affected by any other Lender's failure to make any Loan.

     SECTION 2.3.2. Swing Line Loans. (a) By telephonic notice, promptly
followed (within one Business Day) by the delivery of a confirming Borrowing
Request, to the Swing Line Lender and the Administrative Agent on or before
10:00 a.m., Los Angeles time, on the Business Day the proposed Swing Line Loan
is to be made, the Borrower may from time to time irrevocably request that a
Swing Line Loan be made by the Swing Line Lender in a minimum principal amount
of $500,000 or any larger integral multiple of $100,000. All Swing Line Loans
shall be made as Base Rate Loans and shall not be entitled to be converted into
LIBO Rate Loans. The proceeds of each Swing Line Loan shall be made available
by the Swing Line Lender, by 3:00 p.m., Los Angeles time, on the Business Day
telephonic notice is received by it as provided in this clause (a), to the
Borrower by wire transfer to the account the Borrower shall have specified in
its notice therefor.

     (b) If (i) any Swing Line Loan shall be outstanding for more than four
Business Days or (ii) any Default shall occur and be continuing, each Lender
with a Revolving Loan Commitment (other than the Swing Line Lender) irrevocably
agrees that it will, at the request of the Swing Line Lender and upon notice
from the Administrative Agent, unless such Swing Line Loan shall have been
earlier repaid in full, make a Revolving Loan (which shall initially be funded
as a Base




                                      -44-

<PAGE>


Rate Loan) in an amount equal to such Lender's Percentage in respect of the
Revolving Loan Commitments of the aggregate principal amount of all such Swing
Line Loans then outstanding (such outstanding Swing Line Loans hereinafter
referred to as the "Refunded Swing Line Loans"); provided, that the Swing Line
Lender shall not request, and no Lender with a Revolving Loan Commitment shall
make, any Refunded Swing Line Loan if, after giving effect to the making of
such Refunded Swing Line Loan, the sum of all Swing Line Loans and Revolving
Loans made by such Lender, plus such Lender's Percentage in respect of the
Revolving Loan Commitments of the aggregate amount of all Letter of Credit
Outstandings, would exceed such Lender's Percentage of the then existing
Revolving Loan Commitment Amount. On or before 12:00 p.m., Los Angeles time, on
the first Business Day following receipt by each Lender of a request to make
Revolving Loans as provided in the preceding sentence, each such Lender with a
Revolving Loan Commitment shall deposit in an account specified by the Swing
Line Lender the amount so requested in same day funds and such funds shall be
applied by the Swing Line Lender to repay the Refunded Swing Line Loans. At the
time the aforementioned Lenders make the above referenced Revolving Loans, the
Swing Line Lender shall be deemed to have made, in consideration of the making
of the Refunded Swing Line Loans, a Revolving Loan in an amount equal to the
Swing Line Lender's Percentage in respect of the Revolving Loan Commitments of
the aggregate principal amount of the Refunded Swing Line Loans. Upon the
making (or deemed making, in the case of the Swing Line Lender) of any
Revolving Loans pursuant to this clause (b), the amount so funded shall become
outstanding as a Revolving Loan of such Lender and to the extent to made (or
deemed made, in the case of the Swing Line Lender) shall no longer constitute a
portion of the applicable Swing Line Loan. All interest payable with respect to
any Revolving Loans made (or deemed made, in the case of the Swing Line Lender)
pursuant to this clause (b) shall be appropriately adjusted to reflect the
period of time during which the Swing Line Lender had outstanding Swing Line
Loans in respect of which such Revolving Loans were made. Each Lender's
obligation (in the case of Lenders with a Revolving Loan Commitment) to make
the Revolving Loans referred to in this clause (b) shall be absolute and
unconditional and shall not be affected by any circumstance, including (i) any
set-off, counterclaim, recoupment, defense or other right which such Lender may
have against the Swing Line Lender, the Borrower or any other Person for any
reason whatsoever; (ii) the occurrence or continuance of any Default; (iii) any
adverse change in the condition (financial or otherwise) of the Borrower or any
other Obligor; (iv) the acceleration or maturity of any Loans or the
termination of any Commitment after the making of any Swing Line Loan; (v) any
breach of this Agreement or any other Loan Document by the Borrower or any
Lender; or (vi) any other circumstance, happening or event whatsoever, whether
or not similar to any of the foregoing.

     SECTION 2.4. Continuation and Conversion Elections. By delivering a
Continuation/Conversion Notice to the Administrative Agent on or before 12:00
p.m. (noon), Los Angeles time, on a Business Day, the Borrower may from time to
time irrevocably elect, on not less than one Business Day's notice (in the case
of a conversion of LIBO Rate Loans to Base Rate Loans) or three Business Days'
notice (in the case of a continuation of LIBO Rate Loans or a conversion of
Base Rate Loans into LIBO Rate Loans) nor more than five Business Days'




                                      -45-

<PAGE>


notice (in the case of any Loans) that all, or any portion in a minimum amount
of $500,000 or any larger integral multiple of $100,000, be, in the case of
Base Rate Loans, converted into LIBO Rate Loans or, in the case of LIBO Rate
Loans, converted into Base Rate Loans or continued as LIBO Rate Loans (in the
absence of delivery of a Continuation/Conversion Notice with respect to any
LIBO Rate Loan at least three Business Days before the last day of the then
current Interest Period with respect thereto, such LIBO Rate Loan shall, on
such last day, automatically convert to a Base Rate Loan); provided, however,
that (x) each such conversion or continuation shall be pro rated among the
applicable outstanding Loans of the relevant Lenders, and (y) no portion of the
outstanding principal amount of any Loans may be continued as, or be converted
into, LIBO Rate Loans when any Default has occurred and is continuing.

     SECTION 2.5. Funding. Each Lender may, if it so elects, fulfill its
obligation to make, continue or convert LIBO Rate Loans hereunder by causing
one of its foreign branches or Affiliates (or an international banking facility
created by such Lender) to make or maintain such LIBO Rate Loan, so long as
such action does not result in increased costs to the Borrower; provided,
however, that such LIBO Rate Loan shall nonetheless be deemed to have been made
and to be held by such Lender, and the obligation of the Borrower to repay such
LIBO Rate Loan shall nevertheless be to such Lender for the account of such
foreign branch, Affiliate or international banking facility; and provided,
further, however, that, except for purposes of determining whether any such
increased costs are payable by the Borrower, such Lender shall cause such
foreign branch, Affiliate or international banking facility to comply with the
applicable provisions of clause (b) of Section 4.6 with respect to such LIBO
Rate Loan. In addition, the Borrower hereby consents and agrees that, for
purposes of any determination to be made for purposes of Section 4.1, 4.2, 4.3
or 4.4, it shall be conclusively assumed that each Lender elected to fund all
LIBO Rate Loans by purchasing Dollar deposits in its LIBOR Office's interbank
Eurodollar market.

     SECTION 2.6. Issuance Procedures. By delivering to the applicable Issuer
and the Administrative Agent an Issuance Request on or before 12:00 p.m.
(noon), Los Angeles time, on a Business Day, the Borrower may, from time to
time irrevocably request, on not less than five Business Days' notice (or such
shorter or longer notice as may be acceptable to the applicable Issuer), in the
case of an initial issuance of a Letter of Credit, and not less than five nor
more than ten Business Days' notice (unless a shorter or longer notice period
is acceptable to the applicable Issuer) prior to the then existing Stated
Expiry Date of a Letter of Credit, in the case of a request for the extension
of the Stated Expiry Date of a Letter of Credit, that such Issuer issue, or
extend the Stated Expiry Date of, as the case may be, an irrevocable Letter of
Credit on behalf of the Borrower (whether issued for the account of or on
behalf of the Borrower or any of its Restricted Subsidiaries) in such form as
may be requested by the Borrower and approved by such Issuer, for the purposes
described in Section 7.1.9. Notwithstanding anything to the contrary contained
herein or in any separate application for any Letter of Credit, the Borrower
hereby acknowledges and agrees that it shall be obligated to reimburse the
applicable Issuer upon each Disbursement paid under a Letter of Credit, and it
shall be deemed to be the obligor for purposes of each such




                                      -46-

<PAGE>


Letter of Credit issued hereunder (whether the account party on such Letter of
Credit is the Borrower or a Subsidiary of the Borrower). Upon receipt of an
Issuance Request, the Administrative Agent shall promptly notify the applicable
Issuer and each Lender that has a Revolving Loan Commitment thereof. Each
Letter of Credit shall by its terms be stated to expire on a date (its "Stated
Expiry Date") no later than the earlier to occur of (i) the sixth anniversary
of the Closing Date or (ii) one year from the date of its issuance (subject to
automatic renewal provisions); provided that, notwithstanding the terms of this
clause (ii), a Letter of Credit may, if required by the beneficiary thereof,
contain automatic renewal provisions pursuant to which the Stated Expiry Date
shall be automatically extended (to a date not beyond the date specified in
clause (i) above), unless notice to the contrary shall have been given to the
beneficiary prior to the then existing Stated Expiry Date in accordance with
the terms specified in such Letter of Credit by the applicable Issuer or the
account party of such Letter of Credit (which notice by the account party shall
also have been provided to the applicable Issuer in writing). The applicable
Issuer will make available to the beneficiary thereof the original of each
Letter of Credit which it issues hereunder. In the event that the Issuer is
other than the Administrative Agent, such Issuer will send by facsimile
transmission to the Administrative Agent, promptly on the first Business Day of
each week, its daily maximum amount available to be drawn under the Letters of
Credit issued by such Issuer for the previous week. The Administrative Agent
shall deliver to each Lender upon each calendar month end, and upon each
payment of the letter of credit fees payable pursuant to Section 3.3.3, a
report setting forth the daily maximum amount available to be drawn for all
Issuers during such period. Notwithstanding anything to the contrary herein,
any Issuance Request delivered to the applicable Issuer or Administrative Agent
by the Borrower by telecopier shall be confirmed promptly in an original
writing delivered to such Issuer or Administrative Agent, as the case may be.

     SECTION 2.6.1. Other Lenders' Participation. Upon the issuance of each
Letter of Credit issued by an Issuer pursuant hereto, and without further
action, each Lender (other than such Issuer) that has a Revolving Loan
Commitment shall be deemed to have irrevocably purchased from such Issuer, to
the extent of its Percentage in respect of the Revolving Loan Commitments, and
such Issuer shall be deemed to have irrevocably granted and sold to such Lender
a participation interest in such Letter of Credit (including the Contingent
Liability and any Reimbursement Obligation and all rights with respect
thereto), and such Lender shall, to the extent of its Percentage in respect of
the Revolving Loan Commitments, be responsible for reimbursing promptly (and in
any event within one Business Day) the applicable Issuer for Reimbursement
Obligations which have not been reimbursed by the Borrower in accordance with
Section 2.6.3. In addition, such Lender shall, to the extent of its Percentage
in respect of the Revolving Loan Commitments, be entitled to receive a ratable
portion of the letter of credit fees payable pursuant to Section 3.3.3 with
respect to each Letter of Credit and of interest payable pursuant to Section
3.2 with respect to any Reimbursement Obligation. To the extent that any Lender
has reimbursed the applicable Issuer for a Disbursement as required by this
Section, such Lender shall be entitled to receive its ratable portion of any
amounts subsequently received (from the Borrower or otherwise) in respect of
such Disbursement.




                                      -47-

<PAGE>


     SECTION 2.6.2. Disbursements; Conversion to Revolving Loans. The
applicable Issuer will notify the Borrower and the Administrative Agent
promptly of the presentment for payment of any drawing under any Letter of
Credit issued by such Issuer, together with notice of the date (the
"Disbursement Date") such payment shall be made (each such payment, a
"Disbursement"). Subject to the terms and provisions of such Letter of Credit
and this Agreement, such Issuer shall make such payment to the beneficiary (or
its designee) of such Letter of Credit. Prior to 12:30 p.m., Los Angeles time,
on the first Business Day following the Disbursement Date (the "Disbursement
Due Date"), the Borrower will reimburse the Administrative Agent, for the
account of such Issuer, for all amounts which such Issuer has disbursed under
such Letter of Credit, together with interest thereon at the rate per annum
otherwise applicable to Revolving Loans (made as Base Rate Loans) from and
including the Disbursement Date to but excluding the Disbursement Due Date and,
thereafter (unless such Disbursement is converted into a Base Rate Loan on the
Disbursement Due Date), at a rate per annum equal to the rate per annum then in
effect with respect to overdue Revolving Loans (made as Base Rate Loans)
pursuant to Section 3.2.2 for the period from the Disbursement Due Date through
the date of such reimbursement; provided, however, that, if no Default shall
have then occurred and be continuing, unless the Borrower has notified the
Administrative Agent no later than one Business Day prior to the Disbursement
Due Date that it will reimburse such Issuer for the applicable Disbursement,
then the amount of the Disbursement shall be deemed to be a Borrowing of
Revolving Loans constituting Base Rate Loans and following the giving of notice
thereof by the Administrative Agent to the Lenders, each Lender with a
Revolving Loan Commitment (other than such Issuer) will deliver to such Issuer
on the Disbursement Due Date immediately available funds in an amount equal to
such Lender's Percentage of such Borrowing. Each conversion of Disbursement
amounts into Revolving Loans shall constitute a representation and warranty by
the Borrower that on the date of the making of such Revolving Loans all of the
statements set forth in Section 5.2.1 are true and correct.

     SECTION 2.6.3. Reimbursement. The obligation (a "Reimbursement
Obligation") of the Borrower under Section 2.6.2 to reimburse the applicable
Issuer with respect to each Disbursement (including interest thereon) not
converted into a Base Rate Loan pursuant to Section 2.6.2, and, upon the
Borrower failing or electing not to reimburse such Issuer and the giving of
notice thereof by the Administrative Agent to the Lenders, each Lender's (to
the extent it has a Revolving Loan Commitment) obligation under Section 2.6.1
to reimburse such Issuer or fund its Percentage of any Disbursement converted
into a Base Rate Loan, shall be absolute and unconditional under any and all
circumstances and irrespective of any setoff, counterclaim or defense to
payment which the Borrower or such Lender, as the case may be, may have or have
had against such Issuer or any such Lender, including any defense based upon
the failure of any Disbursement to conform to the terms of the applicable
Letter of Credit (if, in such Issuer's good faith opinion, such Disbursement is
determined to be appropriate) or any non-application or misapplication by the
beneficiary of the proceeds of such Letter of Credit; provided, however, that
after paying in full its Reimbursement Obligation hereunder, nothing herein
shall adversely affect the right of the Borrower or such Lender, as the case
may be, to commence any proceeding




                                      -48-

<PAGE>


against such Issuer for any wrongful Disbursement made by such Issuer under a
Letter of Credit as a result of acts or omissions constituting gross negligence
or willful misconduct on the part of such Issuer.

     SECTION 2.6.4. Deemed Disbursements. Upon the occurrence and during the
continuation of any Event of Default of the type described in clauses (b)
through (d) of Section 8.1.9 with respect to any Obligor (other than
Subsidiaries that are not Material Subsidiaries) or, with notice from the
Administrative Agent acting at the direction of the Required Lenders, upon the
occurrence and during the continuation of any other Event of Default,

          (a) an amount equal to that portion of all Letter of Credit
     Outstandings attributable to the then aggregate amount which is undrawn
     and available under all Letters of Credit issued and outstanding shall,
     without demand upon or notice to the Borrower or any other Person, be
     deemed to have been paid or disbursed by the applicable Issuer under such
     Letters of Credit (notwithstanding that such amount may not in fact have
     been so paid or disbursed); and

          (b) upon notification by the Administrative Agent to the Borrower of
     its obligations under this Section, the Borrower shall be immediately
     obligated to reimburse the applicable Issuer for the amount deemed to have
     been so paid or disbursed by such Issuer.

Any amounts so payable by the Borrower pursuant to this Section shall be
deposited in cash with the Administrative Agent and held as collateral security
for the Obligations in connection with the Letters of Credit issued by the
applicable Issuer. At such time as the Events of Default giving rise to the
deemed disbursements hereunder shall have been cured or waived, the
Administrative Agent shall return to the Borrower all amounts then on deposit
with the Administrative Agent pursuant to this Section, together with accrued
interest at the Federal Funds Rate, which have not been applied to the
satisfaction of such Obligations.

     SECTION 2.6.5. Nature of Reimbursement Obligations. The Borrower and, to
the extent set forth in Section 2.6.1, each Lender with a Revolving Loan
Commitment, shall assume all risks of the acts, omissions or misuse of any
Letter of Credit by the beneficiary thereof. No Issuer (except to the extent of
its own gross negligence or willful misconduct) shall be responsible for:

          (a) the form, validity, sufficiency, accuracy, genuineness or legal
     effect of any Letter of Credit or any document submitted by any party in
     connection with the application for and issuance of a Letter of Credit,
     even if it should in fact prove to be in any or all respects invalid,
     insufficient, inaccurate, fraudulent or forged;





                                      -49-

<PAGE>


          (b) the form, validity, sufficiency, accuracy, genuineness or legal
     effect of any instrument transferring or assigning or purporting to
     transfer or assign a Letter of Credit or the rights or benefits thereunder
     or the proceeds thereof in whole or in part, which may prove to be invalid
     or ineffective for any reason;

          (c) failure of the beneficiary to comply fully with conditions
     required in order to demand payment under a Letter of Credit;

          (d) errors, omissions, interruptions or delays in transmission or
     delivery of any messages, by mail, cable, telegraph, telex or otherwise;
     or

          (e) any loss or delay in the transmission or otherwise of any
     document or draft required in order to make a Disbursement under a Letter
     of Credit.

None of the foregoing shall affect, impair or prevent the vesting of any of the
rights or powers granted to any Issuer or any Lender with a Revolving Loan
Commitment hereunder. In furtherance and extension and not in limitation or
derogation of any of the foregoing, any action taken or omitted to be taken by
the applicable Issuer in good faith (and not constituting gross negligence or
willful misconduct) shall be binding upon the Borrower, each Obligor and each
such Lender, and shall not put such Issuer under any resulting liability to the
Borrower, any Obligor or any such Lender, as the case may be.

     SECTION 2.7. Register; Notes.

          (a) Each Lender may maintain in accordance with its usual practice an
     account or accounts evidencing the Indebtedness of the Borrower to such
     Lender resulting from each Loan made by such Lender, including the amounts
     of principal and interest payable and paid to such Lender from time to
     time hereunder. In the case of a Lender that does not request, pursuant to
     clause (b)(ii) below, execution and delivery of a Note evidencing the
     Loans made by such Lender to the Borrower, such account or accounts shall,
     to the extent not inconsistent with the notations made by the
     Administrative Agent in the Register, be conclusive and binding on the
     Borrower absent manifest error; provided, however, that the failure of any
     Lender to maintain such account or accounts shall not limit or otherwise
     affect any Obligations of the Borrower or any other Obligor.

          (b)(i) The Borrower hereby designates the Administrative Agent to
     serve as the Borrower's agent, solely for the purpose of this clause (b),
     to maintain a register (the "Register") on which the Administrative Agent
     will record each Lender's Commitments, the Loans made by each Lender and
     each repayment in respect of the principal amount of the Loans of each
     Lender and annexed to which the Administrative Agent shall retain a copy
     of each Lender Assignment Agreement delivered to the Administrative Agent
     pursuant to Section 10.11.1. Failure to make any recordation, or any error
     in such




                                      -50-

<PAGE>


     recordation, shall not affect the Borrower's obligation in respect of such
     Loans. The entries in the Register shall be conclusive, in the absence of
     manifest error, and the Borrower, the Administrative Agent and the Lenders
     shall treat each Person in whose name a Loan (and as provided in clause
     (ii) the Note evidencing such Loan, if any) is registered as the owner
     thereof for all purposes of this Agreement, notwithstanding notice or any
     provision herein to the contrary. A Lender's Commitment and the Loans made
     pursuant thereto may be assigned or otherwise transferred in whole or in
     part only by registration of such assignment or transfer in the Register.
     Any assignment or transfer of a Lender's Commitment or the Loans made
     pursuant thereto shall be registered in the Register only upon delivery to
     the Administrative Agent of a Lender Assignment Agreement duly executed by
     the assignor thereof. No assignment or transfer of a Lender's Commitment
     or the Loans made pursuant thereto shall be effective unless such
     assignment or transfer shall have been recorded in the Register by the
     Administrative Agent as provided in this Section.

          (ii) The Borrower agrees that, upon the request to the Administrative
     Agent by any Lender, the Borrower will execute and deliver to such Lender,
     as applicable, a Revolving Note, a Term-A Note, a Term-B Note and a Swing
     Line Note evidencing the Loans made by such Lender. The Borrower hereby
     irrevocably authorizes each Lender to make (or cause to be made)
     appropriate notations on the grid attached to such Lender's Notes (or on
     any continuation of such grid), which notations, if made, shall evidence,
     inter alia, the date of, the outstanding principal amount of, and the
     interest rate and Interest Period applicable to the Loans evidenced
     thereby. Such notations shall, to the extent not inconsistent with the
     notations made by the Administrative Agent in the Register, be conclusive
     and binding on the Borrower absent manifest error; provided, however, that
     the failure of any Lender to make any such notations or any error in any
     such notations shall not limit or otherwise affect any Obligations of the
     Borrower or any other Obligor. The Loans evidenced by any such Note and
     interest thereon shall at all times (including after assignment pursuant
     to Section 10.11.1) be represented by one or more Notes payable to the
     order of the payee named therein and its registered assigns. A Note and
     the obligation evidenced thereby may be assigned or otherwise transferred
     in whole or in part only by registration of such assignment or transfer of
     such Note and the obligation evidenced thereby in the Register (and each
     Note shall expressly so provide). Any assignment or transfer of all or
     part of an obligation evidenced by a Note shall be registered in the
     Register only upon surrender for registration of assignment or transfer of
     the Note evidencing such obligation, accompanied by a Lender Assignment
     Agreement duly executed by the assignor thereof, and thereupon, if
     requested by the assignee, one or more new Notes shall be issued to the
     designated assignee and the old Note shall be returned by the
     Administrative Agent to the Borrower marked "exchanged". No assignment of
     a Note and the obligation evidenced thereby shall be effective unless it
     shall have been recorded in the Register by the Administrative Agent as
     provided in this Section.




                                      -51-

<PAGE>


                                  ARTICLE III

                   REPAYMENTS, PREPAYMENTS, INTEREST AND FEES

     SECTION 3.1. Repayments and Prepayments; Application.

     SECTION 3.1.1. Repayments and Prepayments. The Borrower shall repay in
full the unpaid principal amount of each Loan upon the Stated Maturity Date
therefor. Prior thereto, payments and repayments of Loans shall or may be made
as set forth below.

          (a) From time to time on any Business Day, the Borrower may make a
     voluntary prepayment, in whole or in part, of the outstanding principal
     amount of any

               (i) Loans (other than Swing Line Loans); provided, however, that

                    (A) any such prepayment of the Term-A Loans or Term-B Loans
               shall be made pro rata among Term-A Loans and Term-B Loans, as
               applicable, of the same type and, if applicable, having the same
               Interest Period of all Lenders that have made such Term-A Loans
               or Term-B Loans, and any such prepayment of Revolving Loans
               shall be made pro rata among the Revolving Loans of the same
               type and, if applicable, having the same Interest Period of all
               Lenders that have made such Revolving Loans;

                    (B) the Borrower shall comply with Section 4.4 in the event
               that any LIBO Rate Loan is prepaid on any day other than the
               last day of the Interest Period for such Loan;

                    (C) all such voluntary prepayments shall require at least
               one Business Day's notice in the case of Base Rate Loans, three
               Business Days' notice in the case of LIBO Rate Loans, but no
               more than five Business Days' notice in the case of any Loans,
               in each case in writing to the Administrative Agent; and

                    (D) all such voluntary partial prepayments shall be in an
               aggregate amount of $500,000 or any larger integral multiple of
               $100,000 or in the aggregate principal amount of all Loans of
               the applicable Tranche and type then outstanding; or





                                      -52-

<PAGE>


               (ii) Swing Line Loans, provided that

                    (A) all such voluntary prepayments shall require prior
               telephonic notice to the Swing Line Lender on or before 11:00
               a.m., Los Angeles time, on the day of such prepayment (such
               notice to be confirmed in writing by the Borrower within 24
               hours thereafter); and

                    (B) all such voluntary partial prepayments shall be in an
               aggregate amount of $500,000 and an integral multiple of
               $100,000 or in the aggregate principal amount of all Swing Line
               Loans then outstanding.

          (b) No later than five Business Days following the delivery by the
     Borrower of its annual audited financial reports required pursuant to
     clause (b) of Section 7.1.1 (beginning with the financial reports
     delivered in respect of the 2000 Fiscal Year), the Borrower shall deliver
     to the Administrative Agent a calculation of the Excess Cash Flow for the
     Fiscal Year last ended and, no later than five Business Days following the
     delivery of such calculation, make or cause to be made a mandatory
     prepayment of the Term Loans in an amount equal to 50% of the Excess Cash
     Flow (if any) for such Fiscal Year less (ii) the aggregate amount of all
     voluntary prepayments of the principal of the Term Loans actually made in
     such Fiscal Year pursuant to clause (a) of Section 3.1.1, to be applied as
     set forth in Section 3.1.2; provided, however, that such prepayment shall
     only be required to be made to the extent that the amount of Debt, as
     reduced by giving effect to such prepayment, would result in a Leverage
     Ratio of greater than 3.50:1 on a pro forma basis as of the date of such
     prepayment.

          (c) No later than one Business Day (in the case of Net Debt Proceeds)
     or 30 calendar days (in the case of Net Disposition Proceeds) following
     the receipt of any Net Disposition Proceeds or Net Debt Proceeds by (x) in
     the case of Net Debt Proceeds, Holdco, the Borrower or any Restricted
     Subsidiary of the Borrower and (y) in the case of Net Disposition
     Proceeds, the Borrower or any Restricted Subsidiary of the Borrower, the
     Borrower shall deliver to the Administrative Agent a calculation of the
     amount of such Net Disposition Proceeds or Net Debt Proceeds, as the case
     may be, and, to the extent the amount of such Net Disposition Proceeds or
     Net Debt Proceeds, as the case may be, with respect to any single
     transaction or series of related transactions, exceeds $2,000,000, make a
     mandatory prepayment of the Term Loans in an amount equal to 100% of such
     Net Disposition Proceeds or Net Debt Proceeds, as the case may be, to be
     applied as set forth in Section 3.1.2; provided, that no mandatory
     prepayment on account of such Net Disposition Proceeds shall be required
     under this clause if the Borrower informs the Agents no later than 30 days
     following the receipt of any Net Disposition Proceeds of its or its
     Restricted Subsidiary's good faith intention to apply such Net Disposition
     Proceeds to the acquisition of other assets or property consistent with
     the business permitted to be conducted pursuant to Section 7.2.1
     (including by way of merger or Investment) within




                                      -53-

<PAGE>


     365 days following the receipt of such Net Disposition Proceeds, with the
     amount of such Net Disposition Proceeds unused after such 365 day period
     being applied to the Loans pursuant to Section 3.1.2.

          (d) The Borrower shall, concurrently with the receipt of any Net
     Equity Proceeds by Holdco, the Borrower or any Restricted Subsidiary of
     the Borrower, deliver to the Administrative Agent a calculation of the
     amount of such Net Equity Proceeds, and no later than five Business Days
     following the delivery of such calculation, and, to the extent that the
     amount of such Net Equity Proceeds with respect to any single transaction
     or series of related transactions exceeds $2,000,000, and subject to the
     proviso below, make or cause to be made a mandatory prepayment of the Term
     Loans in an amount equal to 50% of such Net Equity Proceeds to be applied
     as set forth in Section 3.1.2; provided, however, that such prepayment
     shall only be required to be made to the extent that the amount of Debt,
     as reduced by giving effect to such prepayment would result in a Leverage
     Ratio of greater than 3.50:1 on a pro forma basis as of the date of such
     prepayment;

          (e) The Borrower shall, no later than the 60th calendar day following
     the receipt by the Borrower or any of its Restricted Subsidiaries of any
     Casualty Proceeds in excess of $2,000,000 (individually or in the
     aggregate in any Fiscal Year), make or cause to be made a mandatory
     prepayment of the Term Loans in an amount equal to 100% of such Casualty
     Proceeds, to be applied as set forth in Section 3.1.2; provided, that no
     mandatory prepayment on account of Casualty Proceeds shall be required
     under this clause if the Borrower informs the Agents no later than 60 days
     following the occurrence of the Casualty Event resulting in such Casualty
     Proceeds of its or its Restricted Subsidiary's good faith intention to
     apply such Casualty Proceeds to the rebuilding or replacement of the
     damaged, destroyed or condemned assets or property subject to such
     Casualty Event or the acquisition of other assets or property consistent
     with the business permitted to be conducted pursuant to Section 7.2.1
     (including by way of merger or Investment) and in fact uses such Casualty
     Proceeds to rebuild or replace the damaged, destroyed or condemned assets
     or property subject to such Casualty Event or to acquire such other
     property or assets within 365 days following the receipt of such Casualty
     Proceeds, with the amount of such Casualty Proceeds unused after such 365
     day period being applied to the Loans pursuant to Section 3.1.2; provided
     further, however, that at any time when any Event of Default shall have
     occurred and be continuing or Casualty Proceeds not applied as provided
     above shall exceed $2,000,000, such Casualty Proceeds will be deposited in
     an account maintained with the Administrative Agent for disbursement at
     the request of the Borrower to pay for such rebuilding, replacement or
     acquisition.

          (f) On each date when any reduction in the Revolving Loan Commitment
     Amount shall become effective, the Borrower shall make a mandatory
     prepayment of




                                      -54-

<PAGE>


     Revolving Loans and (if necessary) Swing Line Loans and (if necessary)
     deposit with the Administrative Agent cash collateral for Letter of Credit
     Outstandings in an aggregate amount equal to the excess, if any, of the
     sum of (i) the aggregate outstanding principal amount of all Revolving
     Loans and Swing Line Loans and (ii) the aggregate amount of all Letter of
     Credit Outstandings over the Revolving Loan Commitment Amount as so
     reduced;

          (g) The Borrower shall, on the Stated Maturity Date and on each
     Quarterly Payment Date occurring during any period set forth below, make a
     scheduled repayment of the outstanding principal amount, if any, of Term-A
     Loans in an aggregate amount equal to the amount set forth below opposite
     such Stated Maturity Date or period, as applicable (as such amounts may
     have otherwise been reduced pursuant to this Agreement):

                                               Scheduled
                                               Principal
               Period                          Repayment
        -------------------------------        ---------
        10/15/00 to 10/14/01                   $  500,000
        10/15/01 to 10/14/02                   $1,000,000
        10/15/02 to 10/14/03                   $2,000,000
        10/15/03 to 10/14/04                   $2,500,000
        10/15/04 to the Sixth                  $4,000,000
        Anniversary of the Closing
                  Date

          (h) The Borrower shall, on the Stated Maturity Date and on each
     Quarterly Payment Date occurring during any period set forth below, make a
     scheduled repayment of the outstanding principal amount, if any, of Term-B
     Loans in an aggregate amount equal to the amount set forth below opposite
     such Stated Maturity Date or period, as applicable (as such amounts may
     have otherwise been reduced pursuant to this Agreement):






                                      -55-

<PAGE>


                                               Scheduled
                                               Principal
                 Period                        Repayment
        --------------------------             ---------
          10/15/99 to 10/14/06                 $300,000

        10/15/06 to the Eighth                 $27,900,000
          Anniversary of the
             Closing Date

          (i) Following the prepayment in full of the Term Loans, on the date
     the Term Loans would otherwise have been required to be prepaid on account
     of any Net Disposition Proceeds, Net Debt Proceeds, Excess Cash Flow, Net
     Equity Proceeds or Casualty Proceeds, the Borrower shall first, prepay
     Revolving Loans and Swing Line Loans, and, second, deposit with the
     Administrative Agent cash collateral for Letter of Credit Outstandings, in
     an aggregate amount equal to the amount by which the Term Loans would
     otherwise have been required to be prepaid if Term Loans had been
     outstanding.

          (j) The Borrower shall, immediately upon any acceleration of the
     Stated Maturity Date of any Loans or Obligations pursuant to Section 8.2
     or Section 8.3, repay all outstanding Loans and other Obligations, unless,
     pursuant to Section 8.3, only a portion of all Loans and other Obligations
     are so accelerated (in which case the portion so accelerated shall be so
     prepaid).

     Each prepayment of any Loans made pursuant to this Section shall be
without premium or penalty, except as may be required by Section 4.4. No
prepayment of principal of any Revolving Loans or Swing Line Loans pursuant to
clause (a) or (i) of this Section 3.1.1 shall cause a reduction in the
Revolving Loan Commitment Amount or the Swing Line Loan Commitment Amount, as
the case may be.

     SECTION 3.1.2. Application. (a) Subject to clause (b) below, each
prepayment or repayment of principal of the Loans of any Tranche shall be
applied, to the extent of such prepayment or repayment, first, to the principal
amount thereof being maintained as Base Rate Loans, and second, to the
principal amount thereof being maintained as LIBO Rate Loans.

     (b) Each prepayment of Term Loans made pursuant to clauses (a), (b), (c),
(d) and (e) of Section 3.1.1 shall be applied, (i) on a pro rata basis, to the
outstanding principal amount of all remaining Term-A Loans and Term-B Loans and
(ii) in respect of each Tranche of Term Loans, in direct order of maturity of
the remaining scheduled quarterly amortization payments in respect thereof,
until all such Term-A Loans and Term-B Loans have been paid in full (provided,
however, that if the Borrower at any time elects in writing, in its sole
discretion, to permit any




                                      -56-

<PAGE>


Lender that has Term-B Loans to decline to have such Loans prepaid, then any
Lender having Term-B Loans outstanding may, by delivering a notice to the
Agents at least one Business Day prior to the date that such prepayment is to
be made, decline to have such Loans prepaid with the amounts set forth above,
in which case 50% of the amounts that would have been applied to a prepayment
of such Lender's Term-B Loans, as the case may be, shall instead be applied to
a prepayment of the Term-A Loans (until paid in full), with the balance being
retained by the Borrower).

     SECTION 3.2. Interest Provisions. Interest on the outstanding principal
amount of the Loans shall accrue and be payable in accordance with this Section
3.2.

     SECTION 3.2.1. Rates. (a) Each Base Rate Loan shall accrue interest on the
unpaid principal amount thereof for each day from and including the day upon
which such Loan was made or converted to a Base Rate Loan to but excluding the
date such Loan is repaid or converted to a LIBO Rate Loan at a rate per annum
equal to the sum of the Alternate Base Rate for such day plus the Applicable
Margin for such Loan on such day.

     (b) Each LIBO Rate Loan shall accrue interest on the unpaid principal
amount thereof for each day during each Interest Period applicable thereto at a
rate per annum equal to the sum of the LIBO Rate (Reserve Adjusted) for such
Interest Period plus the Applicable Margin for such Loan on such day.

All LIBO Rate Loans shall bear interest from and including the first day of the
applicable Interest Period to (but not including) the last day of such Interest
Period at the interest rate determined as applicable to such LIBO Rate Loan.

     SECTION 3.2.2. Post-Maturity Rates. After the date any principal amount of
any Loan shall have become due and payable (whether on the applicable Stated
Maturity Date, upon acceleration or otherwise), or any other monetary
Obligation (other than overdue Reimbursement Obligations which shall bear
interest as provided in Section 2.6.2) of the Borrower shall have become due
and payable, the Borrower shall pay, but only to the extent permitted by law,
interest (after as well as before judgment) on such amounts at a rate per annum
equal to (a) in the case of any overdue principal of Loans, overdue interest
thereon, overdue commitment fees or other overdue amounts in respect of Loans
or other obligations (or the related Commitments) under a particular Tranche,
the rate that would otherwise be applicable to Base Rate Loans under such
Tranche pursuant to Section 3.2.1 plus 2% and (b) in the case of other overdue
monetary Obligations, the rate that would otherwise be applicable to Revolving
Loans that were Base Rate Loans plus 2%.

     SECTION 3.2.3. Payment Dates. Interest accrued on each Loan shall be
payable, without duplication:





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<PAGE>


          (a) on the Stated Maturity Date therefor;

          (b) in the case of a LIBO Rate Loan, on the date of any payment or
     prepayment, in whole or in part, of principal outstanding on such Loan, to
     the extent of the unpaid interest accrued through such date on the
     principal so paid or prepaid;

          (c) with respect to Base Rate Loans, on each Quarterly Payment Date
     occurring after the date of the initial Borrowing hereunder;

          (d) with respect to LIBO Rate Loans, on the last day of each
     applicable Interest Period (and, if such Interest Period shall exceed
     three months, at intervals of three months after the first day of such
     Interest Period); and

          (e) on that portion of any Loans the Stated Maturity Date of which is
     accelerated pursuant to Section 8.2 or Section 8.3, immediately upon such
     acceleration.

Interest accrued on Loans, Reimbursement Obligations or other monetary
Obligations arising under this Agreement or any other Loan Document after the
date such amount is due and payable (whether on the Stated Maturity Date, upon
acceleration or otherwise) shall be payable upon demand.

     SECTION 3.3. Fees. The Borrower agrees to pay the fees set forth in this
Section 3.3. All such fees shall be non-refundable.

     SECTION 3.3.1. Commitment Fee. The Borrower agrees to pay to the
Administrative Agent for the account of each Lender that has a Revolving Loan
Commitment, for each day during the period (including any portion thereof when
any of the Lenders' Revolving Loan Commitments are suspended by reason of the
Borrower's inability to satisfy any condition of Article V) commencing on the
Closing Date and continuing to but excluding the Revolving Loan Commitment
Termination Date, a commitment fee on such Lender's Percentage of the unused
portion, whether or not then available, of the Revolving Loan Commitment Amount
(net of Letter of Credit Outstandings) for such day at a rate per annum equal
to the Applicable Commitment Fee for such day. Such commitment fee shall be
payable by the Borrower in arrears on each Quarterly Payment Date, commencing
with the first such day following the Closing Date, and on the Revolving Loan
Commitment Termination Date. The making of Swing Line Loans shall not
constitute usage of the Revolving Loan Commitment with respect to the
calculation of commitment fees to be paid by the Borrower to the Lenders. Any
term or provision hereof to the contrary notwithstanding, commitment fees
payable for any period prior to the Closing Date shall be payable in accordance
with the Fee Letter. Payments by the Borrower to the Swing Line Lender in
respect of accrued interest on Swing Line Loans shall be net of the commitment
fee payable in respect of the Swing Line Lender's Revolving Loan Commitment.




                                      -58-

<PAGE>


     SECTION 3.3.2. Administrative Agent Fee. The Borrower agrees to pay an
annual administration fee to the Administrative Agent, for its own account, in
the amount set forth in the Administrative Agent Fee Letter, payable in advance
on the Closing Date and quarterly thereafter.

     SECTION 3.3.3. Letter of Credit Fee. The Borrower agrees to pay to the
Administrative Agent, for the pro rata account of the applicable Issuer and
each other Lender that has a Revolving Loan Commitment, a letter of credit fee
for each day on which there shall be any Letters of Credit outstanding in an
amount equal to (i) with respect to each standby Letter of Credit, a rate per
annum equal to the then Applicable Margin for Revolving Loans maintained as
LIBO Rate Loans, multiplied by the Stated Amount of each such Letter of Credit;
and (ii) with respect to each documentary Letter of Credit, 1.25% per annum
multiplied by the Stated Amount of each such Letter of Credit, such fees being
payable quarterly in arrears on each Quarterly Payment Date. The Borrower
further agrees to pay to the applicable Issuer an issuance fee at the rates and
on such dates agreed to between the Borrower and such Issuer.

                                   ARTICLE IV

                     CERTAIN LIBO RATE AND OTHER PROVISIONS

     SECTION 4.1. LIBO Rate Lending Unlawful. If any Lender shall determine
(which determination shall, in the absence of manifest error, upon notice
thereof to the Borrower and the Lenders, be conclusive and binding on the
Borrower) that the introduction of or any change in or in the interpretation of
any law, in each case after the date upon which such Lender shall have become a
Lender hereunder, makes it unlawful, or any central bank or other governmental
authority asserts, after such date, that it is unlawful, for such Lender to
make, continue or maintain any Loan as, or to convert any Loan into, a LIBO
Rate Loan, the obligations of such Lender to make, continue, maintain or
convert any Loans as or to LIBO Rate Loans shall, upon such determination,
forthwith be suspended until such Lender shall notify the Administrative Agent
that the circumstances causing such suspension no longer exist (with the date
of such notice being the "Reinstatement Date"), and (i) all LIBO Rate Loans
previously made by such Lender shall automatically convert into Base Rate Loans
at the end of the then current Interest Periods with respect thereto or sooner,
if required by such law or assertion and (ii) all Loans thereafter made by such
Lender and outstanding prior to the Reinstatement Date shall be made as Base
Rate Loans, with interest thereon being payable on the same date that interest
is payable with respect to the corresponding Borrowing of LIBO Rate Loans made
by Lenders not so affected.

     SECTION 4.2. Deposits Unavailable. If the Administrative Agent shall have
determined that (i) Dollar deposits in the relevant amount and for the relevant
Interest Period are not available to the Administrative Agent in its relevant
market, or (ii) by reason of circumstances




                                      -59-

<PAGE>


affecting the Administrative Agent's relevant market, adequate means do not
exist for ascertaining the interest rate applicable hereunder to LIBO Rate
Loans, then, upon notice from the Administrative Agent to the Borrower and the
Lenders, the obligations of all Lenders under Section 2.3 and Section 2.4 to
make or continue any Loans as, or to convert any Loans into, LIBO Rate Loans
shall forthwith be suspended until the Administrative Agent shall notify the
Borrower and the Lenders that the circumstances causing such suspension no
longer exist.

     SECTION 4.3. Increased LIBO Rate Loan Costs, etc. The Borrower agrees to
reimburse each Lender for any increase in the cost to such Lender of, or any
reduction in the amount of any sum receivable by such Lender in respect of,
making, continuing or maintaining (or of its obligation to make, continue or
maintain) any Loans as, or of converting (or of its obligation to convert) any
Loans into, LIBO Rate Loans (excluding any amounts, whether or not constituting
Taxes, referred to in Section 4.6) arising as a result of any change in, or the
introduction, adoption, effectiveness, interpretation, reinterpretation or
phase-in of, any law or regulation, directive, guideline, decision or request
(whether or not having the force of law) of any court, central bank, regulator
or other governmental authority that occurs after the date upon which such
Lender became a Lender hereunder. Such Lender shall promptly notify the
Administrative Agent and the Borrower in writing of the occurrence of any such
event, such notice to state, in reasonable detail, the reasons therefor and the
additional amount required fully to compensate such Lender for such increased
cost or reduced amount. Such additional amounts shall be payable by the
Borrower directly to such Lender within five days of its receipt of such
notice, and such notice shall, in the absence of manifest error, be conclusive
and binding on the Borrower.

     SECTION 4.4. Funding Losses. In the event any Lender shall incur any loss
or expense (including any loss or expense incurred by reason of the liquidation
or reemployment of deposits or other funds acquired by such Lender to make,
continue or maintain any portion of the principal amount of any Loan as, or to
convert any portion of the principal amount of any Loan into, a LIBO Rate Loan,
but excluding any loss of margin after the date of any such conversion,
repayment, prepayment or failure to borrow, continue or convert) as a result of
(i) any conversion or repayment or prepayment of the principal amount of any
LIBO Rate Loans on a date other than the scheduled last day of the Interest
Period applicable thereto, whether pursuant to Section 3.1 or otherwise, (ii)
any Loans not being borrowed as LIBO Rate Loans in accordance with the
Borrowing Request therefor, or (iii) any Loans not being continued as, or
converted into, LIBO Rate Loans in accordance with the Continuation/ Conversion
Notice therefor, then, upon the written notice of such Lender to the Borrower
(with a copy to the Administrative Agent), the Borrower shall, within five days
of its receipt thereof, pay directly to such Lender such amount as will (in the
reasonable determination of such Lender) reimburse such Lender for such loss or
expense. Such written notice (which shall include calculations in reasonable
detail) shall, in the absence of manifest error, be conclusive and binding on
the Borrower.





                                      -60-

<PAGE>


     SECTION 4.5. Increased Capital Costs. If any change in, or the
introduction, adoption, effectiveness, interpretation, reinterpretation or
phase-in of, any law or regulation, directive, guideline, decision or request
(whether or not having the force of law) of any court, central bank, regulator
or other governmental authority, in each case occurring after the applicable
Lender becomes a Lender hereunder, affects or would affect the amount of
capital required or expected to be maintained by any Lender or any Person
controlling such Lender, and such Lender determines (in its sole and absolute
discretion) that the rate of return on its or such controlling Person's capital
as a consequence of its Commitments, participation in Letters of Credit or the
Loans made by such Lender is reduced to a level below that which such Lender or
such controlling Person could have achieved but for the occurrence of any such
circumstance, then, in any such case upon notice from time to time by such
Lender to the Borrower, the Borrower shall immediately pay directly to such
Lender additional amounts sufficient to compensate such Lender or such
controlling Person for such reduction in rate of return. A statement of such
Lender as to any such additional amount or amounts (including calculations
thereof in reasonable detail) shall, in the absence of manifest error, be
conclusive and binding on the Borrower. In determining such amount, such Lender
may use any method of averaging and attribution that it (in its sole and
absolute discretion) shall deem applicable; provided, that such Lender may not
impose materially greater costs on the Borrower than on other similarly
situated borrowers by virtue of any such averaging or attribution method.

     SECTION 4.6. Taxes. (a) All payments by the Borrower of principal of, and
interest on, the Loans and all other amounts payable hereunder or under any
other Loan Document (including Reimbursement Obligations, fees and expenses)
shall be made free and clear of and without deduction for any present or future
income, excise, stamp or franchise taxes and other taxes, fees, duties,
withholdings or other charges of any nature whatsoever imposed by any taxing
authority from or through which payments originate or are made or deemed made
by or to the Borrower, but excluding (i) any income, excise, stamp or franchise
taxes and other similar taxes, fees, duties, withholdings or other charges
imposed on any Lender or either of the Agents by a jurisdiction under the laws
of which such Lender or Agent is organized or in which its principal executive
office is located, or otherwise as a result of a present or former connection
between the applicable lending office (or office through which it performs any
of its actions as Lender or Agent) of such Lender or Agent and the jurisdiction
of the governmental authority imposing such tax or any political subdivision or
taxing authority thereof or therein (other than any such connection arising
solely from such Agent or such Lender having executed, delivered or performed
its obligations or received a payment under, or taken any action to enforce,
this Agreement and any Note) or (ii) any income, excise, stamp or franchise
taxes and other similar taxes, fees, duties, withholdings or other charges to
the extent that they are in effect and would apply as of the date any Person
becomes a Lender or Assignee Lender, or as of the date that any Lender changes
its applicable lending office, to the extent such taxes become applicable as a
result of such change (other than a change in an applicable lending office made
pursuant to Section 4.10 below) (such non-excluded items being called "Taxes").
In the event that any withholding or deduction from any payment to be made by
the Borrower hereunder is required in




                                      -61-

<PAGE>


respect of any Taxes pursuant to any applicable law, rule or regulation, then
the Borrower will (i) pay directly to the relevant taxing authority the full
amount required to be so withheld or deducted, (ii) promptly forward to the
Administrative Agent an official receipt or other documentation available to
the Borrower reasonably satisfactory to the Administrative Agent evidencing
such payment to such authority, and (iii) pay to the Administrative Agent for
the account of the Lenders such additional amount or amounts as is necessary to
ensure that the net amount actually received by each Lender will equal the full
amount such Lender would have received had no such withholding or deduction
been required, provided, however, that the Borrower shall not be required to
pay any such additional amounts in respect of amounts payable to any Lender
that is not organized under the laws of the United States or a state thereof to
the extent that the related tax is imposed (or an exemption therefrom is not
available) as a result of such Lender or Agent failing to comply with the
requirements of clause (b) of Section 4.6.

     Moreover, if any Taxes are directly asserted against either of the Agents
or any Lender with respect to any payment received by such Agents or such
Lender hereunder, such Agents or such Lender may pay such Taxes and the
Borrower will promptly pay to such Person such additional amount (including any
penalties, interest or expenses) as is necessary in order that the net amount
received by such Person (including any Taxes on such additional amount) shall
equal the amount of such Taxes paid by such Person; provided, however, that the
Borrower shall not be obligated to make payment to the Lenders or the Agents
(as the case may be) pursuant to this sentence in respect of penalties or
interest attributable to any Taxes, if written demand therefor has not been
made by such Lenders or the Agents within 60 days from the date on which such
Lenders or the Agents knew of the imposition of Taxes by the relevant taxing
authority or for any additional imposition which may arise from the failure of
the Lenders or the Agents to apply payments in accordance with the tax law
after the Borrower has made the payments required hereunder; provided, further,
that the Borrower shall not be required to pay any such additional amounts in
respect of any amounts payable to any Lender or any Agent (as the case may be)
that is not organized under the laws of the United States or a state thereof to
the extent the related Tax is imposed as a result of such Lender failing to
comply with the requirements of clause (b) of Section 4.6. After the Lenders or
the Agents (as the case may be) learn of the imposition of Taxes, such Lenders
and the Agents will act in good faith to notify the Borrower of its obligations
hereunder as soon as reasonably possible.

     If the Borrower fails to pay any Taxes when due to the appropriate taxing
authority or fails to remit to the Administrative Agent, for the account of the
respective Lenders, the required receipts or other required documentary
evidence, the Borrower shall indemnify the Lenders for any incremental Taxes,
interest or penalties that may become payable by any Lender as a result of any
such failure.

     (b) Each Non-U.S. Lender shall, (i) on or prior to the date of the
execution and delivery of this Agreement, in the case of each Lender listed on
the signature pages hereof, or, in the case of an Assignee Lender, on or prior
to the date it becomes a Lender, execute and deliver to the




                                      -62-

<PAGE>


Borrower and the Administrative Agent, two or more (as the Borrower or the
Agents may reasonably request) United States Internal Revenue Service Forms
W-8ECI or Forms W-8BEN (or successor forms) establishing the Lender's exemption
from United States federal withholding tax, or, solely if such Lender is
claiming exemption from United States withholding tax under Section 871(h) or
881(c) of the Code with respect to payments of "portfolio interest", United
States Internal Revenue Service Forms W-8BEN and a certificate signed by a duly
authorized officer of such Lender representing that such Lender is not a "bank"
within the meaning of Section 881(c)(3)(A) of the Code, or such other forms or
documents (or successor forms or documents), appropriately completed,
establishing that payments to such Lender are exempt from withholding or
deduction of United States federal withholding taxes; and (ii) deliver to the
Borrower and the Administrative Agent two further copies of any such form or
documents on or before the date that any such form or document expires or
becomes obsolete and after the occurrence of any event requiring a change in
the most recent such form or document previously delivered by it to the
Borrower. Each Lender and each Agent agrees, to the extent reasonable and
without material cost to it, to provide to the Borrower and the Administrative
Agent such other applicable forms or certificates as would reduce or eliminate
any Tax otherwise applicable.

     (c) If the Borrower determines in good faith that a reasonable basis
exists for contesting the imposition of a Tax with respect to a Lender or
either of the Agents, the relevant Lender or Agent, as the case may be, shall
cooperate with the Borrower in challenging such Tax at the Borrower's expense
if requested by the Borrower; provided, however, that nothing in this Section
4.6 shall require any Lender or Agent to submit to the Borrower or any Person
any tax returns or any part thereof, or to prepare or file any tax returns
other than as such Lender or Agent in its sole discretion shall determine.

     (d) If a Lender or an Agent shall receive a refund (including any offset
or credits from a taxing authority (as a result of any error in the imposition
of Taxes by such taxing authority) of any Taxes paid by the Borrower pursuant
to subsection 4.6(a) above, such Lender or such Agent (as the case may be)
shall promptly pay the Borrower the amount so received, with interest from the
taxing authority with respect to such refund, net of any tax liability incurred
by such Lender or Agent that is attributable to the receipt of such refund and
such interest.

     (e) Each Lender and each Agent agrees, to the extent reasonable and
without material cost to it, to cooperate with the Borrower to minimize any
amounts payable by the Borrower under this Section 4.6; provided, however, that
nothing in this Section 4.6 shall require any Lender or Agent to take any
action which, in the sole discretion of such Lender or Agent, is inconsistent
with its internal policy and legal and regulatory restrictions.

     (f) If the Borrower is required to pay additional amounts to or for the
account of any Lender or Agent pursuant to clause (a) of this Section 4.6 as a
result of a change of law occurring after the date hereof, then such Lender or
Agent, at the request of the Borrower, will change the jurisdiction of its
applicable lending office (or office through which it performs any of its
actions




                                      -63-

<PAGE>


as Agent) if such change (i) would eliminate or reduce any such additional
payment which may thereafter accrue and (ii) is not, in the good faith
determination of such Lender or Agent, otherwise disadvantageous to such Lender
or Agent.

     SECTION 4.7. Payments, Computations, etc. Unless otherwise expressly
provided, all payments by or on behalf of the Borrower pursuant to this
Agreement or any other Loan Document shall be made by the Borrower to the
Administrative Agent for the pro rata account of the Lenders, Agents or Lead
Arranger, as applicable, entitled to receive such payment. All such payments
required to be made to the Administrative Agent shall be made, without setoff,
deduction or counterclaim, not later than 11:00 a.m., Los Angeles time, on the
date due, in same day or immediately available funds, to such account as the
Administrative Agent shall specify from time to time by notice to the Borrower.
Funds received after that time shall be deemed to have been received by the
Administrative Agent on the next succeeding Business Day. The Administrative
Agent shall promptly remit in same day funds to each Lender, Agent or Lead
Arranger, as the case may be, its share, if any, of such payments received by
the Administrative Agent for the account of such Lender, Agent or Lead
Arranger, as the case may be. All interest and fees shall be computed on the
basis of the actual number of days (including the first day but excluding the
last day) occurring during the period for which such interest or fee is payable
over a year comprised of 360 days (or, in the case of interest on a Base Rate
Loan, 365 days or, if appropriate, 366 days). Whenever any payment to be made
shall otherwise be due on a day which is not a Business Day, such payment shall
(except as otherwise required by clause (i) of the definition of the term
"Interest Period") be made on the next succeeding Business Day and such
extension of time shall be included in computing interest and fees, if any, in
connection with such payment.

     SECTION 4.8. Sharing of Payments. If any Lender shall obtain any payment
or other recovery (whether voluntary, involuntary, by application of setoff or
otherwise) on account of any Loan or Reimbursement Obligation (other than
pursuant to the terms of Sections 4.3, 4.4 and 4.5) in excess of its pro rata
share of payments then or therewith obtained by all Lenders entitled thereto,
such Lender shall purchase from the other Lenders such participation in the
Credit Extensions made by them as shall be necessary to cause such purchasing
Lender to share the excess payment or other recovery ratably with each of them;
provided, however, that if all or any portion of the excess payment or other
recovery is thereafter recovered from such purchasing Lender, the purchase
shall be rescinded and each Lender which has sold a participation to the
purchasing Lender shall repay to the purchasing Lender the purchase price to
the ratable extent of such recovery together with an amount equal to such
selling Lender's ratable share (according to the proportion of (i) the amount
of such selling Lender's required repayment to the purchasing Lender in respect
of such recovery, to (ii) the total amount so recovered from the purchasing
Lender) of any interest or other amount paid or payable by the purchasing
Lender in respect of the total amount so recovered. The Borrower agrees that
any Lender so purchasing a participation from another Lender pursuant to this
Section may, to the fullest extent permitted by law, exercise all its rights of
payment (including pursuant to Section 4.9) with respect to such




                                      -64-

<PAGE>


participation as fully as if such Lender were the direct creditor of the
Borrower in the amount of such participation. If under any applicable
bankruptcy, insolvency or other similar law, any Lender receives a secured
claim in lieu of a setoff to which this Section applies, such Lender shall, to
the extent practicable, exercise its rights in respect of such secured claim in
a manner consistent with the rights of the Lenders entitled under this Section
to share in the benefits of any recovery on such secured claim.

     SECTION 4.9. Setoff. Each Lender shall, upon the occurrence of any Event
of Default described in clauses (b) through (d) of Section 8.1.9 with respect
to any Obligor (other than a Subsidiary that is not a Material Subsidiary) or,
with the consent of the Required Lenders, upon the occurrence of any other
Event of Default, to the fullest extent permitted by law, have the right to
appropriate and apply to the payment of the Obligations then due to it, and (as
security for such Obligations) the Borrower hereby grants to each Lender a
continuing security interest in, any and all balances, credits, deposits,
accounts or moneys of the Borrower then or thereafter maintained with or
otherwise held by such Lender; provided, however, that any such appropriation
and application shall be subject to the provisions of Section 4.8. Each Lender
agrees promptly to notify the Borrower and the Administrative Agent after any
such setoff and application made by such Lender; provided, however, that the
failure to give such notice shall not affect the validity of such setoff and
application. The rights of each Lender under this Section are in addition to
other rights and remedies (including other rights of setoff under applicable
law or otherwise) which such Lender may have.

     SECTION 4.10. Mitigation. Each Lender agrees that if it makes any demand
for payment under Sections 4.3, 4.4, 4.5, or 4.6, or if any adoption or change
of the type described in Section 4.1 shall occur with respect to it, it will
use reasonable efforts (consistent with its internal policy and legal and
regulatory restrictions and so long as such efforts would not be
disadvantageous to it, as determined in its sole discretion) to designate a
different lending office if the making of such a designation would reduce or
obviate the need for the Borrower to make payments under Section 4.3, 4.4, 4.5,
or 4.6, or would eliminate or reduce the effect of any adoption or change
described in Section 4.1.

     SECTION 4.11. Replacement of Lenders. Each Lender hereby severally agrees
as set forth in this Section. If any Lender (a "Subject Lender") (i) makes
demand upon the Borrower for (or if the Borrower is otherwise required to pay)
amounts pursuant to Section 4.3, 4.5 or 4.6, (ii) gives notice pursuant to
Section 4.1 requiring a conversion of such Subject Lender's LIBO Rate Loans to
Base Rate Loans or any change in the basis upon which interest is to accrue in
respect of such Subject Lender's LIBO Rate Loans or suspending such Lender's
obligation to make Loans as, or to convert Loans into, LIBO Rate Loans, (iii)
becomes a Non-Consenting Lender or (iv) becomes a Non-Funding Lender, the
Borrower may, within 180 days of receipt by the Borrower of such demand or
notice (or the occurrence of such other event causing the Borrower to be
required to pay such compensation) or within 180 days of such Lender becoming a
Non-Consenting Lender or a Non-Funding Lender, as the case may be, give notice
(a




                                      -65-

<PAGE>


"Replacement Notice") in writing to the Agents and such Subject Lender of its
intention to replace such Subject Lender with a financial institution (a
"Replacement Lender") designated in such Replacement Notice. If the Agents
shall, in the exercise of their reasonable discretion and within 30 days of
their receipt of such Replacement Notice, notify the Borrower and such Subject
Lender in writing that the designated financial institution is satisfactory to
the Agents (such consent not being required where the Replacement Lender is
already a Lender), then such Subject Lender shall, subject to the payment of
any amounts due pursuant to Section 4.4, assign, in accordance with Section
10.11.1, all of its Commitments, Loans and other rights and obligations under
this Agreement and all other Loan Documents (including Reimbursement
Obligations) to such designated financial institution; provided, however, that
(i) such assignment shall be without recourse, representation or warranty and
shall be on terms and conditions reasonably satisfactory to such Subject Lender
and such designated financial institution and (ii) the purchase price paid by
such designated financial institution shall be in the amount of such Subject
Lender's Loans and its Percentage in respect of any Revolving Loan Commitment
under which there are outstanding Reimbursement Obligations of such
Reimbursement Obligation, together with all accrued and unpaid interest and
fees in respect thereof, plus all other amounts (including the amounts demanded
and unreimbursed under Sections 4.3, 4.5 and 4.6), owing to such Subject Lender
hereunder. Upon the effective date of an assignment described above, the
designated financial institution or Replacement Lender shall become a "Lender"
for all purposes under this Agreement and the other Loan Documents.

                                   ARTICLE V

                        CONDITIONS TO CREDIT EXTENSIONS

     SECTION 5.1. Initial Credit Extension. The obligations of the Lenders and,
if applicable, the Issuer to fund the initial Credit Extension shall be subject
to the prior or concurrent satisfaction of each of the conditions precedent set
forth in this Section 5.1.

     SECTION 5.1.1. Resolutions, etc. The Agents shall have received from each
Obligor a certificate, dated the date of the initial Credit Extension, of its
Secretary or Assistant Secretary as to (i) resolutions of its Board of
Directors then in full force and effect authorizing the execution, delivery and
performance of each Loan Document to be executed by it, and (ii) the incumbency
and signatures of those of its officers authorized to act with respect to each
Loan Document executed by it, upon which certificate each Agent and each Lender
may conclusively rely until it shall have received a further certificate of the
Secretary or Assistant Secretary of such Obligor canceling or amending such
prior certificate.

     SECTION 5.1.2. Transaction Documents. The Agents shall have received (with
copies for each Lender that shall have expressly requested copies thereof)
copies of fully executed versions of the Transaction Documents, certified to be
true and complete copies thereof by an




                                      -66-

<PAGE>


Authorized Officer of the Borrower. The Recapitalization Agreement shall be in
full force and effect and shall not have been modified or waived in any
material respect, nor shall there have been any forbearance to exercise any
material rights with respect to any of the terms or provisions relating to the
conditions to the consummation of the Recapitalization and the Merger as set
forth in the Recapitalization Agreement unless otherwise agreed to by the
Required Lenders.

     SECTION 5.1.3. Consummation of Recapitalization and Merger. The Agents
shall have received evidence satisfactory to each of them that all actions
necessary to consummate the Recapitalization and the Merger shall have been
taken.

     SECTION 5.1.4. Closing Date Certificate. Each of the Agents shall have
received, with counterparts for each Lender, the Closing Date Certificate,
substantially in the form of Exhibit D hereto, dated the date of the initial
Credit Extension and duly executed and delivered by an Authorized Officer that
is the president, the chief executive officer or the chief financial or
accounting officer of the Borrower, in which certificate the Borrower shall
agree and acknowledge that the statements made therein shall be deemed to be
true and correct representations and warranties of the Borrower made as of such
date under this Agreement, and, at the time such certificate is delivered, such
statements shall in fact be true and correct.

     SECTION 5.1.5. Delivery of Notes. The Agents shall have received, for the
account of each Lender that has submitted, at least two Business Days prior to
the Closing Date, a written request pursuant to Section 2.7(b)(ii), a Note of
the applicable Tranche duly executed and delivered by the Borrower.

     SECTION 5.1.6. Subsidiary Guaranty. The Agents shall have received a
Subsidiary Guaranty, dated the date hereof, duly executed and delivered by an
Authorized Officer of each U.S. Subsidiary of the Borrower that is a Restricted
Subsidiary and that is in existence on the date of the initial Credit Extension
(after giving effect to the Transaction).

     SECTION 5.1.7. Pledge and Security Agreements, etc. The Agents shall have
received executed counterparts of

          (a) the Holdco Guaranty and Pledge Agreement, dated as of the Closing
     Date, duly executed by an Authorized Officer of Holdco, together with the
     certificates evidencing all of the issued and outstanding shares of
     Capital Stock of the Borrower pledged pursuant to the Holdco Guaranty and
     Pledge Agreement, which certificates shall in each case be accompanied by
     undated powers of transfer duly executed in blank; and

          (b) each Pledge and Security Agreement, dated as of the Closing Date,
     duly executed and delivered by an Authorized Officer of the Borrower and
     each Restricted Subsidiary that is a U.S. Subsidiary, as applicable,
     together with




                                      -67-

<PAGE>


               (i) the certificates evidencing all of the issued and
          outstanding shares of Capital Stock pledged pursuant to the
          applicable Pledge and Security Agreement, which certificates shall in
          each case be accompanied by undated powers of transfer duly executed
          in blank, or, if any such shares of Capital Stock of each U.S.
          Subsidiary of such Obligor pledged pursuant to such Pledge and
          Security Agreement are uncertificated securities or are held through
          a securities intermediary, the Administrative Agent shall have
          obtained "control" (as defined in the UCC) over such shares of
          Capital Stock and such other instruments and documents as the
          Administrative Agent shall deem necessary or in the reasonable
          opinion of the Administrative Agent desirable under applicable law to
          perfect the security interest of the Administrative Agent in such
          shares of Capital Stock;

               (ii) all promissory notes evidencing intercompany Indebtedness
          payable to the Borrower or any Subsidiary Guarantor duly endorsed to
          the order of the Administrative Agent;

               (iii) executed UCC financing statements (Form UCC-1) naming such
          Obligor as the debtor and the Administrative Agent as the secured
          party, or other similar instruments or documents, suitable for filing
          under the UCC of all jurisdictions as may be necessary or, in the
          opinion of the Agents, desirable to perfect the security interest of
          the Administrative Agent in the interests of such Obligor in the
          collateral pledged pursuant to the applicable Pledge and Security
          Agreement (provided that perfection of security interests in (i)
          motor vehicles shall not be required and (ii) certain intellectual
          property owned as of the Closing Date by the Borrower or its U.S.
          Subsidiaries shall be completed in accordance with Section 7.1.11);

               (iv) executed copies of proper UCC termination statements (Form
          UCC-3), if any, necessary to release all Liens and other rights of
          any Person (other than Liens permitted under Section 7.2.3)

                    (A) in any collateral described in the applicable Pledge
               and Security Agreement previously granted by any Person, and

                    (B) securing any of the Indebtedness to be repaid in
               connection with the Transaction on or prior to the Closing Date,

          together with such other UCC termination statements (Form UCC-3) as
          the Agents may reasonably request from such Obligor; and

               (v) certified copies of UCC Requests for Information or Copies
          (Form UCC-11), or a similar search report certified by a party
          acceptable to the Agents,




                                      -68-

<PAGE>


          dated a date reasonably near to the Closing Date, listing all
          effective financing statements which name such Obligor (under its
          present names and any previous names) as the debtor and which are
          filed in the jurisdictions in which filings are to be made pursuant
          to clause (iii) above, together with copies of such financing
          statements.

     SECTION 5.1.8. UCC Filing Service. All UCC financing statements (Form
UCC-1), termination statements (Form UCC-3) or other similar financing
statements required pursuant to the Loan Documents (collectively, the "Filing
Statements") shall have been made available on the Closing Date to CT
Corporation System or another similar filing service company reasonably
acceptable to the Agents (the "Filing Agent"). The Filing Agent shall have
acknowledged in writing reasonably satisfactory to the Agents and their counsel
(i) the Filing Agent's receipt of all such Filing Statements, (ii) that such
Filing Statements have either been submitted for filing in the appropriate
filing offices therefor or will be submitted for filing in such appropriate
offices within ten days of the Closing Date and (iii) that the Filing Agent
will notify the Agents and their counsel of the result of such submissions
within 30 days of the Closing Date.

     SECTION 5.1.9. Financial Information, etc. The Agents shall have received,
with copies for each Lender,

          (a) the (i) audited consolidated balance sheets of the Borrower and
     its Subsidiaries as at December 28, 1996, December 27, 1997 and December
     26, 1998 and the audited consolidated statements of income, cash flows and
     equity interests for the fiscal years ended December 28, 1996, December
     27, 1997 and December 26, 1998 and (ii) unaudited consolidated balance
     sheet of the Borrower and its Subsidiaries as at June 26, 1999 and
     unaudited consolidated statements of income, cash flows and equity
     interests as at June 26, 1999 (collectively, the "Base Financial
     Statements") ; and

          (b) a pro forma consolidated balance sheet and consolidated
     statements of income, cash flows and equity interests of the Borrower and
     its Subsidiaries, as of December 26, 1998 (the "Pro Forma Financial
     Statements"), certified by the chief financial or accounting Authorized
     Officer of the Borrower, giving effect to the consummation of the
     Transaction and reflecting the proposed legal and capital structure of the
     Borrower, which legal and capital structure shall be satisfactory in all
     respects to the Lead Arranger and the Syndication Agent.

     SECTION 5.1.10. Solvency, etc. The Agents shall have received a solvency
certificate from an Authorized Officer that is the chief financial or
accounting officer of the Borrower, dated the date of the initial Borrowing, in
form and substance satisfactory to the Agents.

     SECTION 5.1.11. Equity Contributions, Subordinated Debt Issuance, Discount
Debentures Issuance, Seller Note Issuance and Subco Dividend. The Agents shall
have received




                                      -69-

<PAGE>


evidence satisfactory to each of them that (i) the members of Acquisition LLC
(including DLJMBP and certain members of management of the Borrower and its
Affiliates) shall have made a cash equity contribution in an amount equal to at
least $90,000,000 to Acquisition LLC and Acquisition LLC shall have made a cash
equity contribution in an amount equal to such amount that was received by it
from its members to Acquisition Subco, (ii) the Borrower shall have received
not less than $150,000,000 in gross cash proceeds from the issuance of its
Senior Subordinated Notes and Warrants, (iii) Holdco shall have received not
less than $40,000,000 in gross cash proceeds from the issuance of its Senior
Discount Debentures, (iv) Holdco shall have issued its Seller Subordinated
Discount Note having an initial principal amount equal to $43,000,000 to CRL
and (v) the Borrower shall have paid the Subco Dividend to Holdco in an
aggregate principal amount equal to the sum of (x) the aggregate amount of
Borrowings hereunder on the Closing Date and (y) an amount equal to the
proceeds received by it from the issuance of the Senior Subordinated Notes and
Warrants (less the amount of the proceeds of such debt used to pay (A) the
consideration for the Sierra Acquisition in an amount not to exceed $24,000,000
(plus reasonable and fees and expenses described in clause (B) and (B) all
reasonable and customary fees paid by the Borrower in connection with the
Transaction in an amount not to exceed $20,000,000.

     SECTION 5.1.12. Ownership of Holdco. Following the Recapitalization and
the Merger, Acquisition LLC shall own not less than 87.5% of Holdco's issued
and outstanding common equity and CRL shall own the Rollover Equity
representing no more than 12.5% of Holdco's issued and outstanding common
equity.

     SECTION 5.1.13. Litigation. There shall exist no pending or threatened
material litigation, proceedings or investigations which (x) could reasonably
be expected to materially, adversely affect the consummation of the Transaction
or (y) could reasonably be expected to have a Material Adverse Effect.

     SECTION 5.1.14. Material Adverse Effect. Since December 26, 1998, there
shall not have occurred any event, circumstance or condition constituting or
having a Material Adverse Effect.

     SECTION 5.1.15. Reliance Letters. The Agents shall, unless otherwise
agreed, have received reliance letters, dated the date of the making of the
initial Credit Extension and addressed to each Lender and each Agent, in
respect of each of the legal opinions (other than "disclosure" and other
similar opinions) delivered in connection with the Transaction.

     SECTION 5.1.16. Opinions of Counsel. The Agents shall have received
opinions, dated the date of the initial Credit Extension and addressed to the
Agents and all Lenders from

          (a) Davis Polk & Wardwell, special New York counsel to each of the
     Obligors, in substantially the form of Exhibit J-1 hereto; and




                                      -70-

<PAGE>


          (b) Haythe & Curley, special local counsel to the Obligors, in
     substantially the form of Exhibit J-2 hereto.

          (c) Mr. Dennis Shaughnessy, Esq., General Counsel to the Obligors, in
     substantially the form of Exhibit J-3 hereto.

          (d) Goold Patterson, special Nevada Counsel to the Sierra Companies,
     in substantially the form of Exhibit J-4 hereto.

          (e) Hyller & Irwin, special California Counsel to the Sierra
     Companies, in substantially the form of Exhibit J-5 hereto.

     SECTION 5.1.17. Insurance. The Agents shall have received satisfactory
evidence of the existence of insurance in compliance with Section 7.1.4
(including all endorsements included therein), and the Administrative Agent
shall be named additional insured or loss payee, on behalf of the Lenders,
pursuant to documentation reasonably satisfactory to the Agents and the
Borrower.

     SECTION 5.1.18. Closing Fees, Expenses, etc. The Agents and the Lead
Arranger shall have received, each for its own respective account, or, in the
case of the Administrative Agent, for the account of each Lender, as the case
may be, all fees, costs and expenses due and payable pursuant to Sections 3.3
and 10.3, if then invoiced.

     SECTION 5.1.19. Satisfactory Legal Form. All documents executed or
submitted pursuant hereto by or on behalf of the Borrower or any of its
Subsidiaries or any other Obligors, shall be reasonably satisfactory in form
and substance to the Agents and their counsel; the Agents and their counsel
shall have received all information, approvals, opinions, documents or
instruments that the Agents or their counsel shall have reasonably requested.

     SECTION 5.2. All Credit Extensions. The obligation of each Lender and, if
applicable, the Issuer, to make any Credit Extension (including its initial
Credit Extension) shall be subject to the satisfaction of each of the
conditions precedent set forth in this Section 5.2.

     SECTION 5.2.1. Compliance with Warranties, No Default, etc. Both before
and after giving effect to any Credit Extension the following statements shall
be true and correct:

          (a) the representations and warranties set forth in Article VI and in
     each other Loan Document shall, in each case, be true and correct in all
     material respects with the same effect as if then made (unless stated to
     relate solely to an earlier date, in which case such representations and
     warranties shall be true and correct in all material respects as of such
     earlier date);





                                      -71-

<PAGE>


          (b) the sum of (i) the aggregate outstanding principal amount of all
     Revolving Loans and Swing Line Loans, plus (ii) the aggregate amount of
     all Letter of Credit Outstandings, does not exceed the then existing
     Revolving Loan Commitment Amount; and

          (c) no Default shall have then occurred and be continuing.

     SECTION 5.2.2. Credit Extension Request. The Agents shall have received a
Borrowing Request if Loans are being requested, or an Issuance Request if a
Letter of Credit is being requested or extended. Each of the delivery of a
Borrowing Request or Issuance Request and the acceptance by the Borrower of
proceeds of any Credit Extension shall constitute a representation and warranty
by the Borrower that on the date of such Credit Extension (both immediately
before and after giving effect thereto and the application of the proceeds
thereof) the statements made in Section 5.2.1 are true and correct.

                                   ARTICLE VI

                         REPRESENTATIONS AND WARRANTIES

     In order to induce the Lenders, the Issuers and the Agents to enter into
this Agreement and to make Credit Extensions hereunder, the Borrower represents
and warrants unto the Agents, the Issuers and each Lender as set forth in this
Article VI.

     SECTION 6.1. Organization, etc. The Borrower and each of its Restricted
Subsidiaries (a) is validly organized and existing and in good standing to the
extent required under the laws of the jurisdiction of its incorporation, except
to the extent that the failure to be in good standing would not reasonably be
expected to have a Material Adverse Effect, (b) is duly qualified to do
business and is in good standing to the extent required under the laws of each
jurisdiction where the nature of its business requires such qualification,
except to the extent that the failure to qualify would not reasonably be
expected to result in a Material Adverse Effect, and (c) has full power and
authority and holds all requisite governmental licenses, permits and other
approvals to (i) enter into and perform its obligations in connection with the
Transaction and its Obligations under this Agreement and each other Loan
Document to which it is a party and (ii) own and hold under lease its property
and to conduct its business substantially as currently conducted by it except,
in the case of this clause (c)(ii), where the failure to do so could not
reasonably be expected to result in a Material Adverse Effect.

     SECTION 6.2. Due Authorization, Non-Contravention, etc. The execution,
delivery and performance by the Borrower of this Agreement and each other Loan
Document executed or to be executed by it, and the execution, delivery and
performance by each other Obligor of each Loan Document executed or to be
executed by it and the Borrower's and, where applicable, each




                                      -72-

<PAGE>


such other Obligor's participation in the consummation of the Transaction, are
within the Borrower's and each such Obligor's company powers, have been duly
authorized by all necessary company action, and do not (i) contravene the
Borrower's or any such Obligor's Charter Documents, (ii) contravene any
contractual restriction (other than any such contractual restriction that shall
have been waived on or prior to the Closing Date), law or governmental
regulation or court decree or order binding on or affecting the Borrower or any
such Obligor, where such contravention, individually or in the aggregate, could
reasonably be expected to have a Material Adverse Effect, or (iii) result in,
or require the creation or imposition of, any Lien on any of the Borrower's or
any other Obligor's properties, except pursuant to the terms of a Loan
Document.

     SECTION 6.3. Government Approval, Regulation, etc. No authorization or
approval or other action by, and no notice to or filing with, any governmental
authority or regulatory body or other Person, is required for the due
execution, delivery or performance by the Borrower or any other Obligor of this
Agreement or any other Loan Document to which it is a party, except as have
been duly obtained or made and are in full force and effect or those which the
failure to obtain or make could not reasonably be expected to have a Material
Adverse Effect. All authorizations, approvals and other actions by, and all
notices to and filings with, any governmental authority or regulatory body that
are required pursuant to the Recapitalization Agreement in connection with the
Transaction have been duly obtained or made and are in full force and effect,
except those which the failure to obtain or make could not reasonably be
expected to have a Material Adverse Effect. None of the Borrower or any other
Obligor is an "investment company" within the meaning of the Investment Company
Act of 1940, as amended, or a "holding company", or a "subsidiary company" of a
"holding company", or an "affiliate" of a "holding company" or of a "subsidiary
company" of a "holding company", within the meaning of the Public Utility
Holding Company Act of 1935, as amended.

     SECTION 6.4. Validity, etc. This Agreement constitutes, and each other
Loan Document executed by the Borrower will, on the due execution and delivery
thereof, constitute, the legal, valid and binding obligations of the Borrower
enforceable in accordance with their respective terms; and each Loan Document
executed pursuant hereto by each other Obligor will, on the due execution and
delivery thereof by such Obligor, be the legal, valid and binding obligation of
such Obligor enforceable in accordance with its terms, in each case with
respect to this Section 6.4 subject to the effects of bankruptcy, insolvency,
fraudulent conveyance, reorganization, moratorium and other similar laws
relating to or affecting creditors' rights generally, general equitable
principles (whether considered in a proceeding in equity or at law) and an
implied covenant of good faith and fair dealing.





                                      -73-

<PAGE>


     SECTION 6.5. Financial Information. The Borrower has delivered to the
Agents and each Lender copies of each of (i) the Base Financial Statements, and
(ii) Pro Forma Financial Statements. Each of the financial statements described
above (A) has been prepared (1) in the case of clause (i), in accordance with
GAAP consistently applied, (2) in the case of clause (ii), on a basis
substantially consistent with the basis used to prepare the financial
statements referred to in clause (i), and (B) (1) in the case of clause (i),
present fairly the consolidated financial condition of the corporations covered
thereby as at the date thereof and the results of their operations for the
periods then ended, and (2) in the case of clause (ii), include appropriate pro
forma adjustments to give pro forma effect to the Transaction.

     SECTION 6.6. No Material Adverse Change. Since December 26, 1998, there
has occurred no event, circumstance or condition that constitutes a Material
Adverse Effect.

     SECTION 6.7. Litigation, etc. There is no pending or, to the knowledge of
the Borrower, threatened litigation, action, proceeding, arbitration or
governmental investigation affecting any Obligor, or any of their respective
properties, businesses, assets or revenues, which could reasonably be expected
to result in a Material Adverse Effect except as disclosed in Item 6.7
("Litigation") of the Disclosure Schedule. No development has occurred in any
litigation, action or governmental investigation or other proceeding disclosed
in Item 6.7 ("Litigation") of the Disclosure Schedule which could reasonably be
expected to have a Material Adverse Effect.

     SECTION 6.8. Subsidiaries. After giving effect to the consummation of the
Transaction, the Borrower has only those Subsidiaries (i) which are identified
in Item 6.8 ("Existing Subsidiaries") of the Disclosure Schedule, or (ii) which
are permitted to have been acquired in accordance with Section 7.2.5 or 7.2.8.

     SECTION 6.9. Ownership of Properties. Except to the extent that the
failure to do so could not reasonably be expected to have a Material Adverse
Effect, the Borrower and each of its Restricted Subsidiaries owns good title
to, or leasehold interests in, all of its properties and assets (other than
insignificant properties and assets), real and personal, tangible and
intangible, of any nature whatsoever (including patents, trademarks, trade
names, service marks and copyrights), free and clear of all Liens or material
claims (including material infringement claims with respect to patents,
trademarks, copyrights and the like), except as permitted pursuant to Section
7.2.3.

     SECTION 6.10. Taxes. Each of Holdco, the Borrower and each of their
respective Subsidiaries has filed all Federal, State and other material tax
returns required by law to have been filed by it and has paid all material
taxes and governmental charges thereby shown to be owing, except any such taxes
or charges which are being contested in good faith by appropriate proceedings
and for which adequate reserves in accordance with GAAP shall have been set
aside on its books.





                                      -74-

<PAGE>


     SECTION 6.11. Pension and Welfare Plans. During the
twelve-consecutive-month period prior to the date of the execution and delivery
of this Agreement, no steps have been taken to terminate any Pension Plan, and
no contribution failure has occurred with respect to any Pension Plan
sufficient to give rise to a Lien under section 302(f) of ERISA, which, in
either case, is reasonably expected to lead to a liability to such Pension Plan
in excess of $5,000,000. No condition exists or event or transaction has
occurred with respect to any Pension Plan which could reasonably be expected to
result in the incurrence by the Borrower or any member of the Controlled Group
of any material liability, fine or penalty other than such condition, event or
transaction which would not reasonably be expected to have a Material Adverse
Effect. Except as disclosed in Item 6.11 ("Employee Benefit Plans") of the
Disclosure Schedule or otherwise approved by the Agents (such approval not to
be unreasonably withheld or delayed), since the date of the last financial
statement the Borrower has not increased any contingent liability with respect
to any post-retirement benefit under a Welfare Plan, other than liability for
continuation coverage described in Part 6 of Subtitle B of Title I of ERISA,
except as would not have a Material Adverse Effect.

     SECTION 6.12. Environmental Matters. Except as set forth in Item 6.12
("Environmental Matters") of the Disclosure Schedule or as, individually or in
the aggregate, could not reasonably be expected to have a Material Adverse
Effect:

          (a) all facilities and property owned or leased by the Borrower or
     any of its Subsidiaries are, and continue to be, owned or leased by the
     Borrower and its Subsidiaries in compliance with all Environmental Laws;

          (b) there are no pending or threatened (i) written claims,
     complaints, notices or requests for information received by the Borrower
     or any of its Subsidiaries with respect to any alleged violation of any
     Environmental Law, or (ii) written complaints, notices or inquiries to the
     Borrower or any of its Subsidiaries regarding potential liability under
     any Environmental Law;

          (c) the Borrower and its Subsidiaries have been issued and are in
     compliance with all permits, certificates, approvals, licenses and other
     authorizations relating to environmental matters and necessary or
     desirable for their businesses;

          (d) no property now or, to the best knowledge of the Borrower,
     previously owned or leased by the Borrower or any of its Subsidiaries is
     listed or, to the knowledge of the Borrower, proposed for listing (with
     respect to owned property only) on the National Priorities List pursuant
     to CERCLA, on the CERCLIS or on any similar state list of sites requiring
     investigation or clean-up;

          (e) to the knowledge of the Borrower, the Borrower and its
     Subsidiaries have not directly transported or directly arranged for the
     transportation of any Hazardous Material




                                      -75-

<PAGE>


     to any location (i) which is listed or, to the knowledge of the Borrower,
     proposed for listing on the National Priorities List pursuant to CERCLA,
     on the CERCLIS or on any similar state list, or (ii) which is the subject
     of federal, state or local enforcement actions or other investigations in
     respect of any Environmental Law;

          (f) to the knowledge of the Borrower, there are no underground
     storage tanks, active or abandoned, including petroleum storage tanks, on
     or under any property now or previously owned or leased by the Borrower or
     any of its Subsidiaries;

          (g) to the knowledge of the Borrower, there are no polychlorinated
     biphenyls or friable asbestos present in a manner or condition requiring
     remedial action to comply with any Environmental Law; and

          (h) to the best knowledge of the Borrower, no conditions exist at, on
     or under any property now or previously owned or leased by the Borrower or
     any of its Subsidiaries which, with the passage of time, or the giving of
     notice or both, would give rise to liability to the Borrower or any of its
     Subsidiaries under any Environmental Law.

     SECTION 6.13. Regulations U and X. Neither the Borrower nor Holdco is
engaged in the business of extending credit for the purpose of purchasing or
carrying margin stock, and no proceeds of any Credit Extension will be used in
violation of F.R.S. Board Regulation U or X. Terms for which meanings are
provided in F.R.S. Board Regulation U or X or any regulations substituted
therefor, as from time to time in effect, are used in this Section with such
meanings.

     SECTION 6.14. Accuracy of Information. All material factual information
concerning the financial condition, operations or prospects of the Borrower,
Holdco and their respective Subsidiaries heretofore or contemporaneously
furnished by or on behalf of the Borrower in writing to the Agents, the Lead
Arranger, the Issuers or any Lender for purposes of or in connection with this
Agreement or any transaction contemplated hereby or with respect to the
Transaction is, and all other such factual information hereafter furnished by
or on behalf of the Borrower, Holdco or any of their respective Subsidiaries to
the Agents, the Lead Arranger, the Issuers or any Lender will be, taken as a
whole, true and accurate in every material respect on the date as of which such
information is dated or certified and such information is not, or shall not be,
taken as a whole, as the case may be, incomplete by omitting to state any fact
necessary to make such information not materially misleading.

     Any term or provision of this Section to the contrary notwithstanding,
insofar as any of the factual information described above includes assumptions,
estimates, projections or opinions, no representation or warranty is made
herein with respect thereto; provided, however, that to the extent any such
assumptions, estimates, projections or opinions are based on factual matters,
the Borrower has reviewed such factual matters and nothing has come to its
attention in the context of such review which would lead it to believe that
such factual matters were not or are not true




                                      -76-

<PAGE>


and correct in all material respects or that such factual matters omit to state
any material fact necessary to make such assumptions, estimates, projections or
opinions not misleading in any material respect.

     SECTION 6.15. Solvency. The Transaction (including, among other things,
the incurrence of the initial Credit Extension hereunder, the incurrence by the
Borrower of the Indebtedness represented by the Notes and the Senior
Subordinated Notes, the execution and delivery by the Subsidiary Guarantor, if
any, of a Subsidiary Guaranty, and the application of the proceeds of the
Credit Extensions), will not involve or result in any fraudulent transfer or
fraudulent conveyance under the provisions of Section 548 of the Bankruptcy
Code (11 U.S.C. ss.101 et seq., as from time to time hereafter amended, and any
successor or similar statute) or any applicable state law respecting fraudulent
transfers or fraudulent conveyances. On the Closing Date, after giving effect
to the Transaction, the Borrower is Solvent.

     SECTION 6.16. Year 2000 Compliance. The Borrower believes that its and its
Restricted Subsidiaries' computer applications that are material to its or its
Restricted Subsidiaries' businesses and operations will on a timely basis be
able to perform properly date- sensitive functions for all dates before, on and
after January 1, 2000 (that is, be "Year 2000 compliant") except to the extent
that a failure to do so could not reasonably be expected to have a Material
Adverse Effect.

                                  ARTICLE VII

                                   COVENANTS

     SECTION 7.1. Affirmative Covenants. The Borrower agrees with the Agents,
the Issuers and each Lender that, until the Termination Date has occurred, the
Borrower will perform the obligations set forth in this Section 7.1.

     SECTION 7.1.1. Financial Information, Reports, Notices, etc. The Borrower
will furnish, or will cause to be furnished, to each Lender and each Agent
copies of the following financial statements, reports, notices and information:

          (a) as soon as available and in any event within 60 days after the
     end of each of the first three Fiscal Quarters of each Fiscal Year of the
     Borrower (or, if the Borrower is required to file such information on a
     Form 10-Q with the Securities and Exchange Commission, promptly following
     such filing), a consolidated balance sheet of the Borrower and its
     Subsidiaries as of the end of such Fiscal Quarter, together with the
     related consolidated statements of operations and cash flows for such
     Fiscal Quarter and for the period commencing at the end of the previous
     Fiscal Year and ending with the end of such Fiscal Quarter (it being
     understood that the foregoing requirement may be




                                      -77-

<PAGE>


     satisfied by delivery of the Borrower's report to the Securities and
     Exchange Commission on Form 10-Q, if any), certified by an Authorized
     Officer that is the president, chief executive officer, treasurer,
     assistant treasurer, controller or chief financial or accounting officer
     of the Borrower;

          (b) as soon as available and in any event within 105 days after the
     end of each Fiscal Year of the Borrower (or, if the Borrower is required
     to file such information on a Form 10-K with the Securities and Exchange
     Commission, promptly following such filing), a copy of the annual audit
     report for such Fiscal Year for the Borrower and its Subsidiaries,
     including therein a consolidated balance sheet for the Borrower and its
     Subsidiaries as of the end of such Fiscal Year, together with the related
     consolidated statements of operations and cash flows for such Fiscal Year
     (it being understood that the foregoing requirement may be satisfied by
     delivery of the Borrower's report to the Securities and Exchange
     Commission on Form 10-K, if any), in each case certified (without any
     Impermissible Qualification) by PricewaterhouseCoopers or another "Big
     Five" firm of independent public accountants, together with a certificate
     from such accountants as to whether, in making the examination necessary
     for the signing of their report on such annual report by such accountants,
     they have become aware of any Default in respect of any term, covenant,
     condition or other provision of this Agreement (including any Default in
     respect of any of the financial covenants contained in Section 7.2.4) that
     relates to accounting matters that has occurred and is continuing or, if
     in the opinion of such accounting firm such a Default has occurred and is
     continuing, a statement as to the nature thereof;

          (c) together with the delivery of the financial information required
     pursuant to clauses (a) and (b), a Compliance Certificate, in
     substantially the form of Exhibit E-1, executed by an Authorized Officer
     that is the president, the chief executive officer or the chief financial
     or accounting officer of the Borrower, showing (in reasonable detail and
     with appropriate calculations and computations in all respects
     satisfactory to the Agents) compliance with the financial covenants set
     forth in Section 7.2.4;

          (d) as soon as possible and in any event within five Business Days
     after obtaining knowledge of the occurrence of any Default, if such
     Default is then continuing, a statement of an Authorized Officer that is
     the president, chief executive officer, treasurer, assistant treasurer,
     controller or chief financial or accounting officer of the Borrower
     setting forth details of such Default and the action which the Borrower
     has taken or proposes to take with respect thereto;

          (e) promptly and in any event within five Business Days after (x) the
     occurrence of any development with respect to any litigation, action,
     proceeding or labor controversy described in Section 6.7 which could
     reasonably be expected to have a Material Adverse Effect or (y) the
     commencement of any labor controversy, litigation, action or proceeding




                                      -78-

<PAGE>



     of the type described in Section 6.7, notice thereof and of the action
     which the Borrower has taken or proposes to take with respect thereto;

          (f) promptly after the sending or filing thereof, copies of all
     reports and registration statements (other than exhibits thereto and any
     registration statement on Form S-8 or its equivalent) which the Borrower
     or any of its Subsidiaries files with the Securities and Exchange
     Commission or any national securities exchange;

          (g) as soon as practicable after the controller, chief financial or
     accounting officer or the chief executive officer of the Borrower or a
     member of the Borrower's Controlled Group becomes aware of (i) formal
     steps in writing to terminate any Pension Plan or (ii) the occurrence of
     any event with respect to a Pension Plan which, in the case of clause (i)
     or (ii), could reasonably be expected to result in a contribution to such
     Pension Plan by (or a liability to) the Borrower or a member of the
     Borrower's Controlled Group in excess of $5,000,000, (iii) the failure to
     make a required contribution to any Pension Plan if such failure is
     sufficient to give rise to a Lien under section 302(f) of ERISA in an
     amount in excess of $5,000,000, (iv) the taking of any action with respect
     to a Pension Plan which could reasonably be expected to result in the
     requirement that the Borrower furnish a bond to the PBGC or such Pension
     Plan in an amount in excess of $5,000,000 or (v) any material increase in
     the contingent liability of the Borrower with respect to any
     post-retirement Welfare Plan benefit as a result of a change in the level
     or scope of benefits thereunder, notice thereof and copies of all
     documentation relating thereto; and

          (h) such other information respecting the condition or operations,
     financial or otherwise, of the Borrower or any of its Subsidiaries as any
     Lender through the Administrative Agent may from time to time reasonably
     request.

     SECTION 7.1.2. Compliance with Laws, etc. The Borrower will, and will
cause each of its Subsidiaries to, comply in all material respects with all
applicable laws, rules, regulations and orders, such compliance to include (i)
except as permitted under Section 7.2.8, the maintenance and preservation of
its existence and qualification as a foreign business entity, except where the
failure to so qualify could not reasonably be expected to have a Material
Adverse Effect, and (ii) the payment, before the same become delinquent, of all
material taxes, assessments and governmental charges imposed upon it or upon
its property except to the extent being contested in good faith by appropriate
proceedings and for which adequate reserves in accordance with GAAP shall have
been set aside on its books.

     SECTION 7.1.3. Maintenance of Properties. Except to the extent that the
failure to do so could not reasonably be expected to have a Material Adverse
Effect, the Borrower will, and will cause each of its Restricted Subsidiaries
to, maintain, preserve, protect and keep its properties (other than
insignificant properties) in good repair, working order and condition (ordinary
wear and tear excepted), and make necessary and proper repairs, renewals and
replacements so that its




                                      -79-

<PAGE>


business carried on in connection therewith may be properly conducted at all
times, unless the Borrower determines in good faith that the continued
maintenance of any of its properties is no longer economically desirable.

     SECTION 7.1.4. Insurance. The Borrower will, and will cause each of its
Restricted Subsidiaries to, maintain or cause to be maintained with responsible
insurance companies insurance with respect to its properties and business
against such casualties and contingencies and of such types and in such amounts
as is customary in the case of similar businesses and with such provisions and
endorsements as the Agents may reasonably request and will, upon request of the
Agents, furnish to the Agents and each Lender a certificate of an Authorized
Officer of the Borrower setting forth the nature and extent of all insurance
maintained by the Borrower and its Restricted Subsidiaries in accordance with
this Section.

     SECTION 7.1.5. Books and Records. The Borrower will, and will cause each
of its Restricted Subsidiaries to, keep books and records which accurately
reflect in all material respects all of its business affairs and transactions
and permit the Agents, the Issuers and each Lender or any of their respective
representatives, at reasonable times and intervals, and upon reasonable notice,
but, unless an Event of Default shall have occurred and be continuing, not more
frequently than once in each Fiscal Year, to visit its business offices, to
discuss its financial matters with its officers and, after notice to the
Borrower and provision of an opportunity for the Borrower to participate in
such discussion, its independent public accountants (and the Borrower hereby
authorizes such independent public accountants to discuss the Borrower's
financial matters with each Issuer and each Lender or its representatives,
whether or not any representative of the Borrower is present so long as the
Borrower has been afforded a reasonable opportunity to be present) and to
examine, and to photocopy extracts from, any of its books or other financial
records. The cost and expense of each such visit shall be borne by the
applicable Agent or Lender, except that the Administrative Agent may make one
such visit each Fiscal Year and the cost and expense thereof shall be borne by
the Borrower.

     SECTION 7.1.6. Environmental Covenant. The Borrower will and will cause
each of its Subsidiaries to,

          (a) use and operate all of its facilities and properties in
     compliance with all Environmental Laws, keep all necessary permits,
     approvals, certificates, licenses and other authorizations relating to
     environmental matters in effect and remain in compliance therewith, and
     handle all Hazardous Materials in compliance with all applicable
     Environmental Laws, in each case except where the failure to comply with
     the terms of this clause could not reasonably be expected to have a
     Material Adverse Effect;

          (b) promptly notify the Agents and provide copies of all written
     claims, complaints, notices or inquiries relating to the condition of its
     facilities and properties which relate to environmental matters or
     compliance with Environmental Laws which




                                      -80-

<PAGE>


     would have, or would reasonably be expected to have, a Material Adverse
     Effect, and promptly cure and have dismissed with prejudice any material
     actions and proceedings relating to compliance with Environmental Laws,
     except to the extent being diligently contested in good faith by
     appropriate proceedings and for which adequate reserves in accordance with
     GAAP have been set aside on its books; and

          (c) provide such information and certifications which the Agents may
     reasonably request from time to time to evidence compliance with this
     Section 7.1.6.

     SECTION 7.1.7. Future Subsidiaries. (a) Upon any Person becoming, after
the Closing Date, a Future Pledged Foreign Subsidiary or U.S. Subsidiary of the
Borrower that is a Restricted Subsidiary, or (in the case of clause (b) below
only) upon the Borrower or any such Subsidiary acquiring additional Capital
Stock of any existing Subsidiary that is a Restricted Subsidiary and a U.S.
Subsidiary or a Future Pledged Foreign Subsidiary, the Borrower shall notify
the Agents of such acquisition, and

          (i) the Borrower shall promptly cause such U.S. Subsidiary to execute
     and deliver to the Administrative Agent, with counterparts for each
     Lender, a supplement to the Subsidiary Pledge and Security Agreement (and,
     if such U.S. Subsidiary owns any real property, to the extent required by
     clause (b) of Section 7.1.8, a Mortgage), together with UCC financing
     statements (form UCC-1) executed and delivered by such U.S. Subsidiary
     naming such U.S. Subsidiary as the debtor and the Administrative Agent as
     the secured party, or other similar instruments or documents, in
     appropriate form for filing under the UCC and any other applicable
     recording statutes, in the case of real property, of all jurisdictions as
     may be necessary or, in the reasonable opinion of the Administrative
     Agent, desirable to perfect the security interest of the Administrative
     Agent pursuant to the Subsidiary Pledge and Security Agreement or a
     Mortgage, as the case may be (other than the perfection of security
     interests in motor vehicles); and

          (ii) the Borrower shall promptly deliver, or cause to be delivered,
     to the Administrative Agent under a Pledge Agreement (as supplemented, if
     necessary, by a Foreign Pledge Agreement or other supplement thereto)
     certificates (if any) representing all of the issued and outstanding
     shares of Capital Stock of such Subsidiary owned by the Borrower or any
     Restricted Subsidiary of the Borrower that is a U.S. Subsidiary, as the
     case may be, along with undated powers of transfer for such certificates,
     executed in blank, or, if any securities subject thereto are
     uncertificated securities or are held through a securities intermediary,
     the Administrative Agent shall have obtained "control" (as defined in the
     UCC applicable to the perfection of such securities) over such securities,
     or other appropriate steps shall have been taken under applicable law
     resulting in the perfection and "control" (as defined in the UCC) of the
     security interest granted in favor of the Administrative Agent pursuant to
     the terms of a Pledge Agreement,





                                      -81-

<PAGE>


together, in each case, with such opinions, in form and substance and from
counsel satisfactory to the Agents, as the Agents may reasonably require;
provided, however, that notwithstanding the foregoing, no Foreign Subsidiary
shall be required to execute and deliver a Mortgage or a supplement to the
Subsidiary Pledge and Security Agreement, nor will the Borrower or any U.S.
Subsidiary of the Borrower be required to deliver in pledge pursuant to a
Pledge Agreement in excess of 65% of the Voting Stock of a Foreign Subsidiary.

     (b) (i) The Borrower shall, within 10 days of the Closing Date, (A)
deliver to the Administrative Agent (to the extent such shares are
certificated) 65% of all of the Voting Stock of each of the Foreign
Subsidiaries identified on Item 7.1.7(b) ("Existing Foreign Subsidiaries") of
the Disclosure Schedule, which certificates shall in each case be accompanied
by undated powers of transfer duly executed in blank, or, (B) ensure that (to
the extent any such shares are uncertificated securities or are held through a
securities intermediary) the Administrative Agent shall have obtained "control"
(as defined in the UCC) over 65% of all of the shares of such Voting Stock and
deliver such other instruments and documents as the Administrative Agent shall
deem necessary or in the reasonable opinion of the Administrative Agent
desirable under applicable law to perfect the security interest of the
Administrative Agent in such shares of Voting Stock.

          (ii) In connection with the pledge of 65% of the Voting Stock of each
of the Foreign Subsidiaries identified on Item 7.1.7(b) ("Existing Foreign
Subsidiaries") of the Disclosure Schedule, the Agents shall have received from
counsel satisfactory to the Agents, no later than the date set forth opposite
each such Foreign Subsidiary in such Item, an opinion addressed to the Agents
and the Lenders in form and substance satisfactory to the Agents.

     SECTION 7.1.8. Future Leased Property and Future Acquisitions of Real
Property; Future Acquisition of Other Property.

          (a) Prior to entering into any new lease of real property or renewing
     any existing lease of real property following the Closing Date, the
     Borrower shall, and shall cause each of its U.S. Subsidiaries that are
     Restricted Subsidiaries to, use its (and their) best efforts (which shall
     not require the expenditure of cash or the making of any material
     concessions under the relevant lease) to deliver to the Administrative
     Agent a Waiver executed by the lessor of any real property that is to be
     leased by the Borrower or such U.S. Subsidiary for a term in excess of one
     year in any state which by statute grants such lessor a "landlord's" (or
     similar) Lien which is superior to the Administrative Agent's, to the
     extent the value of any personal property of the Borrower or its U.S.
     Subsidiaries that are Restricted Subsidiaries to be held at such leased
     property exceeds (or it is anticipated that the value of such personal
     property will, at any point in time during the term of such leasehold
     term, exceed) $3,000,000.





                                      -82-

<PAGE>


          (b) In the event that the Borrower or any of its U.S. Subsidiaries
     that are Restricted Subsidiaries shall acquire any real property having a
     value as determined in good faith by the Administrative Agent in excess of
     $2,000,000 in the aggregate, the Borrower or the applicable U.S.
     Subsidiary shall, promptly after such acquisition, execute a Mortgage in
     favor of the Administrative Agent, as mortgagee for the ratable benefit of
     the Lenders, and provide the Administrative Agent with (i) evidence of the
     completion (or satisfactory arrangements for the completion) of all
     recordings and filings of such Mortgage as may be necessary or, in the
     reasonable opinion of the Administrative Agent, desirable effectively to
     create a valid, perfected, first priority Lien, subject to Liens permitted
     by Section 7.2.3, against the properties purported to be covered thereby,
     (ii) mortgagee's title insurance policies in favor of the Administrative
     Agent, as mortgagee for the ratable benefit of the Lenders, in amounts and
     in form and substance and issued by insurers, in each case reasonably
     satisfactory to the Agents, with respect to the property purported to be
     covered by such Mortgage, insuring that title to such property is
     indefeasible and that the interests created by the Mortgage constitute
     valid first Liens thereon free and clear of all defects and encumbrances
     other than as permitted by Section 7.2.3 or as approved by the Agents, and
     such policies shall also include, to the extent available, a revolving
     credit endorsement and such other endorsements as the Agents shall
     reasonably request and shall be accompanied by evidence of the payment in
     full of all premiums thereon, and (iii) such other approvals, opinions, or
     documents as the Agents may reasonably request.

          (c) In accordance with the terms and provisions of the Pledge
     Agreements, the Borrower and each U.S. Subsidiary that is a Restricted
     Subsidiary shall provide the Agents with evidence of all recordings and
     filings as may be necessary or, in the reasonable opinion of the
     Administrative Agent, desirable to create a valid, perfected first
     priority Lien, subject to the Liens permitted by Section 7.2.3, against
     all property acquired after the Closing Date (excluding motor vehicles,
     leases of real property and (except to the extent required under clause
     (b) of this Section 7.1.8) fee interests in real property) and not
     otherwise subject to Section 7.1.11 or 7.1.12.

     SECTION 7.1.9. Use of Proceeds, etc. The Borrower shall

          (a) apply the proceeds of the Loans

               (i) in the case of the Term Loans and Revolving Loans in an
          aggregate principal amount not in excess of $2,000,000 made on the
          Closing Date, to pay, in part, the cash portion of the obligations of
          Holdco in connection with the Transaction and to pay the transaction
          fees and expenses associated with the Transaction (directly or by
          paying the Subco Dividend); provided, that the aggregate amount of
          such transaction fees and expenses shall not exceed $20,000,000; and




                                      -83-

<PAGE>


               (ii) in the case of Revolving Loans (other than Revolving Loans
          described in clause (a)(i) above) and Swing Line Loans, for working
          capital and general corporate purposes of the Borrower and its
          Subsidiaries; and

          (b) use Letters of Credit only for purposes of supporting working
     capital and general corporate purposes of the Borrower and its Restricted
     Subsidiaries.

     SECTION 7.1.10. Hedging Obligations. Within six months following the
Closing Date, the Administrative Agent shall have received evidence
satisfactory to it that the Borrower has entered into interest rate swap, cap,
collar or similar arrangements (including such Indebtedness accruing interest
at a fixed rate by its terms) designed to protect the Borrower against
fluctuations in interest rates with respect to at least 50% of the aggregate
principal amount of the Term Loans and the Senior Subordinated Notes for a
period of at least three years from the Closing Date, with terms reasonably
satisfactory to the Borrower and the Agents.

     SECTION 7.1.11. Undertaking. The Borrower will deliver to the Agents no
later than 60 days after the Closing Date instruments or documents, in
appropriate form for filing with the United States Patent and Trademark Office,
sufficient to create and perfect a security interest in all intellectual
property owned as of the Closing Date by the Borrower and the U.S. Subsidiaries
that are Restricted Subsidiaries as identified in Item 7.1.11 ("Intellectual
Property") of the Disclosure Schedule.

     SECTION 7.1.12. Mortgages. Within 60 days after the Closing Date, the
Borrower shall deliver to the Administrative Agent, as mortgagee for the
ratable benefit of the Lenders, counterparts of each Mortgage relating to each
property listed on Item 7.1.12 ("Mortgaged Properties") of the Disclosure
Schedule, each dated as of the date of such delivery, duly executed by the
Borrower or the applicable U.S. Subsidiary that is a Restricted Subsidiary,
together with

          (a) evidence of the completion (or satisfactory arrangements for the
     completion) of all recordings and filings of such Mortgage as may be
     necessary or, in the reasonable opinion of the Administrative Agent,
     desirable effectively to create a valid, perfected first priority Lien,
     subject to Liens permitted by Section 7.2.3, against the properties
     purported to be covered thereby;

          (b) mortgagee's title insurance policies in favor of the
     Administrative Agent, as mortgagee for the ratable benefit of the Lenders,
     in amounts and in form and substance and issued by insurers, in each case
     reasonably satisfactory to the Agents, with respect to the property
     purported to be covered by such Mortgage, insuring that title to such
     property is marketable and that the interests created by the Mortgage
     constitute valid first Liens thereon free and clear of all defects and
     encumbrances other than as permitted by Section 7.2.3 or as approved by
     the Agents, and such policies shall also include, to the extent available,
     a revolving credit endorsement and such other endorsements as the




                                      -84-

<PAGE>


     Administrative Agent shall reasonably request (provided, however, that if
     the Administrative Agent requests, any survey endorsement or coverage
     other than with respect to the existing survey, if any, of the Mortgaged
     Property that was previously delivered to the Borrower by B&L or CRL or
     any of their respective Subsidiaries or in the possession of the Borrower
     or any of its Subsidiaries on the Closing Date, then the 60-day period
     referred to in the lead-in to this Section shall be extended by an
     additional 30 days) and shall be accompanied by evidence of the payment in
     full of all premiums thereon; and

          (c) such other approvals, opinions or documents as the Agents may
     reasonably request.

     SECTION 7.1.13. Year 2000 Compliance. The Borrower will promptly notify
the Administrative Agent in the event the Borrower discovers or determines that
any computer application (including those of its suppliers and vendors) that is
material to its or any of its Restricted Subsidiaries' businesses and
operations will not be Year 2000 compliant as of January 1, 2000, except to the
extent that such failure could not reasonably be expected to have a Material
Adverse Effect.

     SECTION 7.2. Negative Covenants. The Borrower agrees with the Agents and
each Lender that, until the Termination Date has occurred, the Borrower will
perform the obligations set forth in this Section 7.2.

     SECTION 7.2.1. Business Activities. The Borrower will not, and will not
permit any of its Restricted Subsidiaries to, engage in any business activity,
except the business activities of the type in which the Borrower and its
Subsidiaries are engaged on the date hereof (after giving effect to the
Transaction) and any businesses reasonably ancillary, incidental or related
thereto.

     SECTION 7.2.2. Indebtedness. The Borrower will not, and will not permit
any of its Restricted Subsidiaries to, create, incur, assume or suffer to exist
or otherwise become or be liable in respect of any Indebtedness, other than,
without duplication, the following:

          (a) Indebtedness outstanding on the Closing Date and identified in
     Item 7.2.2(a) ("Ongoing Indebtedness") of the Disclosure Schedule, and
     refinancings and replacements thereof in a principal amount not exceeding
     the principal amount of the Indebtedness so refinanced or replaced and
     with an average life to maturity of not less than the then average life to
     maturity of the Indebtedness so refinanced or replaced;

          (b) Indebtedness in respect of the Credit Extensions and other
     Obligations;

          (c) Indebtedness incurred by the Borrower or any of its Restricted
     Subsidiaries that is represented by Capitalized Lease Liabilities,
     mortgage financings or purchase




                                      -85-

<PAGE>


     money obligations (but only to the extent otherwise permitted by Section
     7.2.7); provided, that the maximum aggregate amount of all Indebtedness
     permitted under this clause (c) shall not at any time exceed $10,000,000;

          (d) intercompany Indebtedness of (i) (x) any U.S. Subsidiary that is
     a Restricted Subsidiary of the Borrower owing to the Borrower or any of
     its Restricted Subsidiaries or (y) the Borrower owing to any of its
     Restricted Subsidiaries, and (ii) any Foreign Subsidiary that is a
     Restricted Subsidiary of the Borrower owing to the Borrower or any U.S.
     Subsidiary that is a Restricted Subsidiary of the Borrower; provided that
     (A) any such Indebtedness described in this clause (d)(ii) (other than (I)
     any such Indebtedness owing by Charles River Japan, which is subject to
     the provisions of clause (B) and (II) any such Indebtedness constituting
     an Investment made pursuant to clause (a)(ii) of Section 7.2.5 and (III)
     other than any such intercompany Indebtedness incurred to finance any
     acquisition permitted hereunder) shall not exceed, when taken together
     with the aggregate amount at such time of all outstanding Investments made
     in all such Foreign Subsidiaries pursuant to clause (l) of Section 7.2.5
     (other than any Investments made as part of, or to finance, any
     acquisition permitted hereunder), $10,000,000 at any time outstanding and
     (B) any Indebtedness described in this clause (d)(ii) owing by Charles
     River Japan shall not exceed, when taken together with all Investments in
     Charles River Japan (whether debt or equity), $40,000,000; provided
     further that any Indebtedness described in this clause (d) which is owing
     to the Borrower or any of its U.S. Subsidiaries that are Restricted
     Subsidiaries, (1) to the extent requested by the Agents, such Indebtedness
     shall be evidenced by one or more promissory notes in form and substance
     satisfactory to the Agents which shall be duly executed and delivered to
     (and indorsed to the order of) the Administrative Agent in pledge pursuant
     to a Pledge Agreement and (2) in the case of any such Indebtedness owed by
     a Person other than the Borrower or a Subsidiary Guarantor, such
     Indebtedness shall not be forgiven or otherwise discharged for any
     consideration other than payment (Dollar for Dollar) in cash unless the
     Agents otherwise consent;

          (e) Indebtedness evidenced by the Senior Subordinated Debt in an
     aggregate outstanding principal amount not to exceed $150,000,000 and
     subordinated guarantees thereof;

          (f) Assumed Indebtedness of the Borrower and its Restricted
     Subsidiaries in an aggregate principal amount not to exceed $10,000,000 at
     any time outstanding;

          (g) Hedging Obligations of the Borrower or any of its Restricted
     Subsidiaries in respect of the Credit Extensions or otherwise entered into
     by the Borrower or any Restricted Subsidiary to hedge against interest
     rate, currency exchange rate or commodity price risk, in each case arising
     in the ordinary course of business of the Borrower and its Restricted
     Subsidiaries and not for speculative purposes;




                                      -86-

<PAGE>


          (h) Indebtedness of Foreign Subsidiaries of the Borrower in an
     aggregate principal amount not to exceed $5,000,000 at any time
     outstanding;

          (i) other unsecured Indebtedness of the Borrower and its Restricted
     Subsidiaries in an aggregate principal amount at any time outstanding not
     to exceed $10,000,000 plus the difference between the maximum amount of
     additional Revolving Loan Commitments that have been or could be provided
     under clause (c) of Section 2.1.2 and the then outstanding amount of
     additional Revolving Loans made pursuant to clause (c) of Section 2.1.2;

          (j) Indebtedness of any Foreign Subsidiary owing to any other Foreign
     Subsidiary; and

          (k) from and after the time that it becomes a Restricted Subsidiary,
     Indebtedness of Charles River Japan, which when taken together with all
     Investments in Charles River Japan (whether in debt or equity), does not
     exceed an aggregate principal amount equal to $40,000,000.

provided, however, that (i) no Indebtedness otherwise permitted by clause (c),
(d) (as such clause (d) relates to loans made by the Borrower or any Subsidiary
Guarantor to Restricted Subsidiaries which are not party to a Subsidiary
Guaranty), (f), (h) or (i) may be incurred if, immediately before or after
giving effect to the incurrence thereof, any Default shall have occurred and be
continuing, and (ii) all such Indebtedness of the type described in clause
(d)(i)(y) above that is owed to Subsidiaries that are not Subsidiary Guarantors
shall be subordinated, in writing, to the Obligations upon terms satisfactory
to the Agents.

     SECTION 7.2.3. Liens. The Borrower will not, and will not permit any of
its Restricted Subsidiaries to, create, incur, assume or suffer to exist any
Lien upon any of its property, revenues or assets, whether now owned or
hereafter acquired, except:

          (a) Liens existing on the Closing Date and identified in Item
     7.2.2(b) ("Ongoing Liens") of the Disclosure Schedule and extensions and
     renewals thereof; provided that no such extension or renewal shall
     increase the obligations secured by such Lien, extend such Lien to
     additional assets or otherwise result in a Default hereunder;

          (b) Liens securing payment of the Obligations or any obligation under
     any Rate Protection Agreement granted pursuant to any Loan Document;

          (c) Liens granted to secure payment of Indebtedness of the type
     permitted and described in clause (c) of Section 7.2.2;





                                      -87-

<PAGE>


          (d) Liens for taxes, assessments or other governmental charges or
     levies, including Liens pursuant to Section 107(l) of CERCLA or other
     similar law, not at the time delinquent or thereafter payable without
     penalty or being contested in good faith by appropriate proceedings and
     for which adequate reserves in accordance with GAAP shall have been set
     aside on its books;

          (e) Liens of carriers, warehousemen, mechanics, repairmen,
     materialmen, contractors, laborers and landlords or other like Liens
     incurred in the ordinary course of business for sums not overdue for a
     period of more than 30 days or being diligently contested in good faith by
     appropriate proceedings and for which adequate reserves in accordance with
     GAAP shall have been set aside on its books;

          (f) Liens incurred in the ordinary course of business in connection
     with workmen's compensation, unemployment insurance or other forms of
     governmental insurance or benefits, or to secure performance of tenders,
     bids, statutory or regulatory obligations, insurance obligations, leases
     and contracts (other than for borrowed money) entered into in the ordinary
     course of business or to secure obligations on surety or appeal bonds;

          (g) judgment Liens in existence less than 30 days after the entry
     thereof or with respect to which execution has been stayed or the payment
     of which is covered in full by a bond or a letter of credit or (subject to
     a customary deductible) by insurance maintained with responsible insurance
     companies and Liens in existence less than 30 days, which Liens secure any
     such bond or reimbursement obligation with respect to such letter of
     credit;

          (h) (i) Liens with respect to minor imperfections of title and
     easements, rights-of-way, restrictions, reservations, permits, servitudes
     and other similar encumbrances on real property and fixtures which do not
     materially detract from the value or materially impair the use by the
     Borrower or any such Restricted Subsidiary in the ordinary course of their
     business of the property subject thereto; (ii) in the case of any property
     covered by a Mortgage, encumbrances disclosed in the title insurance
     policy issued to, and reasonably approved by the Agents insuring the
     Mortgage; and (iii) in the case of any property covered by a Mortgage,
     upon certification by the Borrower that an easement, right-of-way,
     restriction, reservation, permit, servitude or other similar encumbrance
     granted or to be granted by the Borrower or any such Restricted Subsidiary
     does not materially detract from the value of or materially impair the use
     by the Borrower or such Restricted Subsidiary in the ordinary course of
     its business of the property subject to or to be subject to such
     encumbrance, the Administrative Agent shall execute such documents as are
     reasonably requested to subordinate its Mortgage to such encumbrance;





                                      -88-

<PAGE>


          (i) leases or subleases granted by the Borrower or any of its
     Restricted Subsidiaries to any other Person in the ordinary course of
     business;

          (j) Liens in the nature of trustees' Liens granted pursuant to any
     indenture governing any Indebtedness permitted by Section 7.2.2, in each
     case in favor of the trustee under such indenture and securing only
     obligations to pay compensation to such trustee, to reimburse its expenses
     and to indemnify it under the terms thereof;

          (k) Liens of sellers of goods to the Borrower and its Restricted
     Subsidiaries arising under Article 2 of the UCC or similar provisions of
     applicable law in the ordinary course of business, covering only the goods
     sold and securing only the unpaid purchase price for such goods and
     related expenses;

          (l) Liens securing Assumed Indebtedness of the Borrower and its
     Restricted Subsidiaries permitted pursuant to clause (f) of Section 7.2.2;
     provided, however, that (i) any such Liens attach only to the property of
     the Subsidiary acquired, or the property acquired, in connection with such
     Assumed Indebtedness and shall not attach to any assets of the Borrower or
     any of its Restricted Subsidiaries theretofore existing or which arise
     after the date thereof and (ii) the Assumed Indebtedness and other secured
     Indebtedness of the Borrower and its Restricted Subsidiaries secured by
     any such Lien shall not exceed 100% of the fair market value of the assets
     being acquired in connection with such Assumed Indebtedness;

          (m) Liens on assets of Foreign Subsidiaries of the Borrower securing
     Indebtedness permitted pursuant to clause (h) or (j) of Section 7.2.2; and

          (n) Liens on the Capital Stock of Unrestricted Subsidiaries securing
     Debt incurred by such Unrestricted Subsidiaries.

     SECTION 7.2.4. Financial Covenants.

     (a) EBITDA. The Borrower will not permit EBITDA for the period of four
consecutive Fiscal Quarters ending on the last day of any Fiscal Quarter
occurring during any period set forth below to be less than the amount set
forth opposite such period:







                                      -89-

<PAGE>


     Period                                                 EBITDA
     ------                                                 ------
     01/01/00 to 12/31/00                                   $50,000,000
     01/01/01 to 12/31/01                                   $50,000,000
     01/01/02 to 12/31/02                                   $55,000,000
     01/01/03 to 12/31/03                                   $60,000,000
     01/01/04 to 12/31/04                                   $65,000,000
     01/01/05 and thereafter                                $70,000,000;

provided that, to the extent the amount of EBITDA for any period of four
consecutive Fiscal Quarters exceeds the amount of EBITDA required to be
maintained for such period pursuant to this clause (a), an amount equal to 50%
of such excess amount may be carried forward to (but only to) the next
succeeding period of four consecutive Fiscal Quarters.

     (b) Leverage Ratio. The Borrower will not permit the Leverage Ratio as of
the end of any Fiscal Quarter occurring during any period set forth below to be
greater than the ratio set forth opposite such period:

     Period                                                 Leverage Ratio
     ------                                                 --------------
     01/01/00 to 12/31/00                                   6.00:1
     01/01/01 to 12/31/01                                   5.75:1
     01/01/02 to 12/31/02                                   5.25:1
     01/01/03 to 12/31/03                                   4.25:1
     01/01/03 to 12/31/04                                   3.50:1
     01/01/04 and thereafter                                3.00:1.

     (c) Interest Coverage Ratio. The Borrower will not permit the Interest
Coverage Ratio as of the end of any Fiscal Quarter ending after the Closing
Date and occurring during any period set forth below to be less than the ratio
set forth opposite such period:






                                      -90-

<PAGE>


                                                       Interest Coverage
     Period                                                  Ratio
     ------                                            --------------
     01/01/00 to 12/31/00                              1.40:1
     01/01/01 to 12/31/01                              1.50:1
     01/01/02 to 12/31/02                              1.75:1
     01/01/03 to 12/31/03                              2.00:1
     01/01/03 to 12/31/04                              2.25:1
     01/01/05 and thereafter                           2.50:1.

     (d) Fixed Charge Coverage Ratio. The Borrower will not permit the Fixed
Charge Coverage Ratio as of the end of any Fiscal Quarter ending after the
Closing Date to be less than 1:1.

     SECTION 7.2.5. Investments. The Borrower will not, and will not permit any
of its Restricted Subsidiaries to, make, incur, assume or suffer to exist any
Investment in any other Person, except:

          (a) (i) Investments existing on the Closing Date and identified in
     Item 7.2.5(a) ("Ongoing Investments") of the Disclosure Schedule and
     extensions or renewals thereof, provided that no such extension or renewal
     shall be permitted if it would (x) increase the amount of such Investment
     at the time of such extension or renewal or (y) result in a Default
     hereunder and (ii) Investments resulting from the conversion or
     recharacterization of Ongoing Investments (including the conversion of any
     Ongoing Investments constituting equity Investments into debt
     Investments), provided that no such Investment may be made in reliance on
     this clause (a)(ii) if such Investment would require, at the time of the
     making thereof, the contribution or other payment by the Borrower or any
     of its U.S. Subsidiaries that are Restricted Subsidiaries of any
     additional cash or other assets to any Subsidiary that is not a Subsidiary
     Guarantor;

          (b) Cash Equivalent Investments;

          (c) without duplication, Investments permitted as Indebtedness
     pursuant to Section 7.2.2;

          (d) without duplication, Investments permitted as Capital
     Expenditures pursuant to Section 7.2.7 (including any such Investments
     which would otherwise constitute




                                      -91-

<PAGE>


     Capital Expenditures but for the operation of clause (i) of the proviso to
     the definition of "Capital Expenditures");

          (e) Investments made by the Borrower or any of its Restricted
     Subsidiaries, solely with proceeds which have been contributed, directly
     or indirectly after the Closing Date, to the Borrower or such Restricted
     Subsidiary as cash equity from holders of Holdco's Capital Stock for the
     purpose of making an Investment identified in a notice to the Agents on or
     prior to the date that such capital contribution is made, which
     Investments shall result in the Borrower or such Restricted Subsidiary
     acquiring a majority controlling interest in the Person in which such
     Investment was made or increasing any such controlling interest already
     maintained by it;

          (f) Investments to the extent the consideration received pursuant to
     clause (c)(i) of Section 7.2.9 is not all cash;

          (g) Investments in the form of loans to officers, directors and
     employees of the Borrower and its Restricted Subsidiaries for the sole
     purpose of purchasing Holdco Capital Stock or the Capital Stock of any
     entity that directly or indirectly holds Holdco Capital Stock or of
     refinancing any such loans made by others (or purchases of such loans made
     by others);

          (h) Investments made in one or more transactions by the Borrower or
     any of its Restricted Subsidiaries for the acquisition by the Borrower or
     such Restricted Subsidiary of the Capital Stock of Charles River Japan;
     provided, however, that (i) Investments made pursuant to this clause (h)
     shall not exceed (whether in debt or equity) an amount equal to, in the
     aggregate, the product of (x) $40,000,000 and (y) a fraction, the
     numerator of which is the percentage of ownership of Charles River Japan
     acquired by the Borrower after the Closing Date (including in connection
     with any such Investment) and the denominator of which is 50 (provided
     that the first such Investment made by the Borrower or such Restricted
     Subsidiary on or subsequent to the Closing Date may be increased by an
     additional $5,000,000 so long as the aggregate amount of all such
     Investments does not exceed $40,000,000), (ii) the Borrower and its
     Restricted Subsidiaries shall vote their respective direct or indirect
     equity interest in Charles River Japan against Charles River Japan
     entering into any agreement of the type described in clause (b) of Section
     7.2.12 and (iii) the Borrower and its Restricted Subsidiaries shall vote
     their respective direct or indirect equity interest in Charles River Japan
     against Charles River Japan making any dividend or distribution to, or
     Investment in, or entering into (or suffering to exist) any profit,
     revenue or cash flow sharing arrangement with any owner (beneficial or
     otherwise) of Charles River Japan's common equity or any Affiliate thereof
     which shall be disproportional to the fully diluted common equity
     ownership percentage of such Person (except for (i) permitting the common
     owners of Charles River Japan to pay taxes from such dividend or
     distribution and (ii) in the case of a




                                      -92-

<PAGE>


     recapitalization, pursuant to which the Borrower and its Restricted
     Subsidiaries become the sole owner of Charles River Japan);

          (i) Letters of Credit issued in support of, and guarantees by the
     Borrower or any Restricted Subsidiary of, Indebtedness permitted under
     clauses (b), (c), (g) and (i) of Section 7.2.2;

          (j) Investments made or held by any Foreign Subsidiary of the
     Borrower that is a Restricted Subsidiary in any other Foreign Subsidiary
     of the Borrower that is a Restricted Subsidiary;

          (k) (i) Investments of the Borrower or any U.S. Subsidiary of the
     Borrower that is a Restricted Subsidiary in the Borrower or any U.S.
     Subsidiary of the Borrower that is a Restricted Subsidiary and (ii)
     Investments by the Borrower or any U.S. Subsidiary of the Borrower that is
     a Restricted Subsidiary in a Foreign Subsidiary of the Borrower that is a
     Restricted Subsidiary in connection with the creation of such Foreign
     Subsidiary; provided that in the case of clause (k)(ii), such Investment
     is in the form of Capital Stock of one or more other Foreign Subsidiaries;

          (l) Investments (other than Investments made under other clauses of
     this Section 7.2.5) made by the Borrower or any of its Restricted
     Subsidiaries in an aggregate amount not to exceed $25,000,000 in any
     single transaction (or a series of related transactions) or $50,000,000 in
     an aggregate amount over the term of this Agreement; provided that (i)
     such Investments (x) result in the Borrower or the relevant Restricted
     Subsidiary acquiring (subject to Section 7.2.1) a majority controlling
     interest in the Person (or its assets and businesses) in which such
     Investment was made, or increasing any such controlling interest
     maintained by it in such Person or (y) result in the Person in which such
     Investment was made becoming an Acquired Controlled Person and a
     Restricted Subsidiary for the purposes set forth in the last sentence of
     the definition of the term "Subsidiary"; (ii) to the extent any Assumed
     Indebtedness permitted pursuant to clause (f) of Section 7.2.2 would be
     incurred in connection with any such Investment to be made pursuant to
     this clause (l), the permitted amounts set forth in this clause shall be
     reduced, Dollar for Dollar, by the outstanding principal amount of any
     such Assumed Indebtedness to be assumed; and (iii) the amount of
     Investments made by the Borrower or any of its U.S. Subsidiaries that are
     Restricted Subsidiaries in any of its Foreign Subsidiaries that are
     Restricted Subsidiaries, when taken together with the outstanding
     aggregate principal amount of Indebtedness incurred by such Foreign
     Subsidiaries from the Borrower and such U.S. Subsidiaries pursuant to
     clause (d)(ii) of Section 7.2.2, shall not exceed $10,000,000;

          (m) extensions of trade credit in the ordinary course of business;





                                      -93-

<PAGE>


          (n) Investments in Hedging Obligations permitted hereunder;

          (o) Investments (including debt obligations and Capital Stock)
     received in connection with the bankruptcy or reorganization of suppliers
     and customers and in settlement of delinquent obligations of and other
     disputes with customers and suppliers arising in the ordinary course of
     business; and

          (p) other Investments in an aggregate amount at any time outstanding
     not to exceed $10,000,000.

provided, however, that

          (q) any Investment which when made complies with the requirements of
     the definition of the term "Cash Equivalent Investment" may continue to be
     held notwithstanding that such Investment if made thereafter would not
     comply with such requirements; and

          (r) no Investment otherwise permitted by clause (c) (except to the
     extent permitted under Section 7.2.2), (g), (i) (to the extent that the
     applicable Letter of Credit relates to Indebtedness permitted under clause
     (c) or (j) of Section 7.2.2), (l) or (p) shall be permitted to be made if,
     immediately before or after giving effect thereto, any Default shall have
     occurred and be continuing.

     SECTION 7.2.6. Restricted Payments, etc. On and at all times after the
date hereof:

          (a) the Borrower will not, and will not permit any of its Restricted
     Subsidiaries to, declare, pay or make any payment, dividend, distribution
     or exchange (in cash, property or obligations) on or in respect of any
     shares of any class of Capital Stock (now or hereafter outstanding) of the
     Borrower or on any warrants, options or other rights with respect to any
     shares of any class of Capital Stock (now or hereafter outstanding) of the
     Borrower (other than (i) dividends or distributions payable in its Capital
     Stock or warrants to purchase its Capital Stock and (ii) splits or
     reclassifications of its Capital Stock into additional or other shares of
     its Capital Stock) or apply, or permit any of its Restricted Subsidiaries
     to apply, any of its funds, property or assets to the purchase,
     redemption, exchange, sinking fund or other retirement of, or agree or
     permit any of its Subsidiaries to purchase, redeem or exchange, any shares
     of any class of Capital Stock (now or hereafter outstanding) of the
     Borrower, warrants, options or other rights with respect to any shares of
     any class of Capital Stock (now or hereafter outstanding) of the Borrower;

          (b) the Borrower will not, and will not permit any of its Restricted
     Subsidiaries to, (i) directly or indirectly make any payment or prepayment
     of principal of, or make any




                                      -94-

<PAGE>


     payment of interest on, any Senior Subordinated Debt on any day other than
     the stated, scheduled date for such payment or prepayment set forth in the
     Senior Subordinated Debt Documents or which would violate the
     subordination provisions of such Senior Subordinated Debt, or (ii) redeem,
     purchase or defease any Senior Subordinated Debt;

(the foregoing prohibited acts referred to in clauses (a) and (b) above are
herein collectively referred to as "Restricted Payments"); provided, however,
that

          (c) notwithstanding the provisions of clauses (a) and (b) above, the
     Borrower shall be permitted to make Restricted Payments to Holdco to the
     extent necessary to enable Holdco to

               (i) pay its overhead expenses (including advisory fees in an
          amount not to exceed $500,000 in the aggregate in any Fiscal Year) in
          an amount not to exceed $2,000,000 in the aggregate in any Fiscal
          Year;

               (ii) pay taxes;

               (iii) so long as (A) no Default shall have occurred and be
          continuing on the date such Restricted Payment is declared or to be
          made, nor would a Default result from the making of such Restricted
          Payment, (B) after giving effect to the making of such Restricted
          Payment, the Borrower shall be in pro forma compliance with the
          covenant set forth in clause (b) of Section 7.2.4 for the most recent
          full Fiscal Quarter immediately preceding the date of the making of
          such Restricted Payment for which the relevant financial information
          has been delivered pursuant to clause (a) or clause (b) of Section
          7.1.1, and (C) an Authorized Officer of the Borrower shall have
          delivered a certificate to the Administrative Agent in form and
          substance satisfactory to the Administrative Agent (including a
          calculation of the Borrower's pro forma compliance with the covenant
          set forth in clause (b) of Section 7.2.4 in reasonable detail)
          certifying as to the accuracy of clauses (c)(iii)(A) and (c)(iii)(B)
          above,

                    (x) repurchase, redeem or otherwise acquire or retire for
               value any Capital Stock of Holdco, or any warrant, option or
               other right to acquire any such Capital Stock of Holdco or the
               Capital Stock of any entity that directly or indirectly holds
               the Capital Stock of Holdco, held by any director, member of
               management or an employee of the Borrower or any of its
               Restricted Subsidiaries pursuant to any employment agreement,
               management equity subscription agreement, restricted stock plan,
               stock option agreement or other similar arrangement so long as
               the total amount of such repurchases, redemptions, acquisitions,
               retirements and payments shall not exceed (I) $5,000,000 in any
               calendar year, subject to a




                                      -95-

<PAGE>


               maximum amount of $10,000,000 of the term of this Agreement plus
               (II) the aggregate cash proceeds and aggregate principal amount
               of any notes received by the Borrower during such calendar year
               from any reissuance of Capital Stock of Holdco, and warrants,
               options and other rights to acquire Capital Stock of Holdco, by
               Holdco or the Borrower to directors, members of management and
               employees of the Borrower and its Restricted Subsidiaries (to
               the extent such proceeds are not otherwise required to be
               applied pursuant to clause (d) of Section 3.1.1); and

                    (y) make cash payments of interest with respect to the
               Senior Discount Debentures in accordance with the terms thereof;
               and

          (d) notwithstanding the provisions of clauses (a) and (b) above, the
     Borrower and its Restricted Subsidiaries shall be permitted to make the
     Restricted Payments included in the Transaction (including the Subco
     Dividend).

     SECTION 7.2.7. Capital Expenditures, etc. With respect to Capital
Expenditures, the parties covenant and agree as follows:

          (a) The Borrower will not, and will not permit any of its Restricted
     Subsidiaries to, make or commit to make Capital Expenditures in any Fiscal
     Year ending on or after to December 31, 2000, except Capital Expenditures
     of the Borrower and its Restricted Subsidiaries, not to exceed an amount
     (the "Base Amount") equal to (i) $17,500,000 in the case of any Fiscal
     Year; plus (ii) an aggregate amount in addition to the Base Amount over
     the term of this Agreement equal to $25,000,000; provided, however, that,
     to the extent the Base Amount exceeds the aggregate amount of Capital
     Expenditures (other than amounts permitted to be made pursuant to clause
     (a)(ii) above or clause (b) below) actually made during such Fiscal Year,
     such excess amount (up to an aggregate of 50% of the amount of the Base
     Amount for such Fiscal Year) may be carried forward to (but only to) the
     next succeeding Fiscal Year (any such amount to be certified by the
     Borrower to the Agents in the Compliance Certificate delivered for the
     last Fiscal Quarter of such Fiscal Year, and any such amount carried
     forward to a succeeding Fiscal Year shall be deemed to be used prior to
     the Borrower and its Restricted Subsidiaries using the Base Amount for
     such succeeding Fiscal Year, without giving effect to such carry-forward).

          (b) The parties acknowledge and agree that the permitted Capital
     Expenditure level set forth in clause (a) above shall be exclusive of (i)
     the amount of Capital Expenditures actually made with cash capital
     contributions made to the Borrower or any of its Restricted Subsidiaries,
     directly or indirectly, by any Person other than the Borrower and its
     Restricted Subsidiaries, after the Closing Date and specifically
     identified in a certificate delivered by an Authorized Officer of the
     Borrower to the Agents on or about the time such capital contribution or
     equity issuance is made (but in




                                      -96-

<PAGE>


     any event prior to the time of the Capital Expenditure made with such
     capital contribution or equity issuance) (provided that, to the extent
     such cash capital contributions or any proceeds from such equity issuance
     constitute Net Equity Proceeds arising from the issuance by Holdco or the
     Borrower of their respective Capital Stock, only that portion of such Net
     Equity Proceeds which are not required to be applied as a prepayment
     pursuant to clause (d) of Section 3.1.1 may be used for Capital
     Expenditures pursuant to this clause (b)) and (ii) any portion of any
     acquisition that is permitted under Section 7.2.5 (other than pursuant to
     clause (d) thereof) that is accounted for as a Capital Expenditure.

     SECTION 7.2.8. Consolidation, Merger, etc. The Borrower will not, and will
not permit any of its Restricted Subsidiaries to, liquidate or dissolve,
consolidate with, or merge into or with, any other corporation, or purchase or
otherwise acquire all or substantially all of the assets of any Person (or of
any division thereof), except

          (a) any such Restricted Subsidiary may liquidate or dissolve
     voluntarily into, and may merge with and into, the Borrower (so long as
     the Borrower is the surviving corporation of such combination or merger)
     or any other Restricted Subsidiary, and the assets or Capital Stock of any
     Restricted Subsidiary may be purchased or otherwise acquired by the
     Borrower or any other Restricted Subsidiary; provided, that
     notwithstanding the above, a Restricted Subsidiary may only liquidate or
     dissolve into, or merge with and into, another Restricted Subsidiary of
     the Borrower if, after giving effect to such combination or merger, the
     Borrower continues to own (directly or indirectly), and the Administrative
     Agent continues to have pledged to it pursuant to a Pledge Agreement, a
     percentage of the issued and outstanding shares of Capital Stock (on a
     fully diluted basis) of the Restricted Subsidiary surviving such
     combination or merger that is equal to or in excess of the percentage of
     the issued and outstanding shares of Capital Stock (on a fully diluted
     basis) of the Restricted Subsidiary that does not survive such combination
     or merger that was (immediately prior to the combination or merger) owned
     by the Borrower or pledged to the Administrative Agent;

          (b) so long as no Default has occurred and is continuing or would
     occur after giving effect thereto, the Borrower or any of its Restricted
     Subsidiaries may purchase all or substantially all of the assets of any
     Person (or any division thereof) not then a Restricted Subsidiary, or
     acquire such Person by merger, if permitted (without duplication) pursuant
     to Section 7.2.7 or clause (e), (f), (l), (o) or (p) of Section 7.2.5;

          (c) the Borrower and its Restricted Subsidiaries may consummate the
     Transaction; and

          (d) the Borrower and its Restricted Subsidiaries may liquidate or
     dissolve Charles River China and Charles River Mexico and may take any
     action described in clause (b) or (d) of Section 8.1.9.




                                      -97-

<PAGE>


     SECTION 7.2.9. Asset Dispositions, etc. The Borrower will not, and will
not permit any of its Restricted Subsidiaries to, sell, transfer, lease,
contribute or otherwise convey, or grant options, warrants or other rights with
respect to, all or any part of its assets, whether now owned or hereafter
acquired (including accounts receivable and Capital Stock of Restricted
Subsidiaries) to any Person, unless:

          (a) such sale, transfer, lease, contribution or conveyance of such
     assets is (i) in the ordinary course of its business (and does not
     constitute a sale, transfer, lease, contribution or other conveyance of
     all or a substantial part of the Borrower's and its Restricted
     Subsidiaries' assets, taken as a whole) or is of obsolete or worn out
     property, (ii) permitted by Section 7.2.8, or (iii) between the Borrower
     and one of its Restricted Subsidiaries or between Restricted Subsidiaries
     of the Borrower;

          (b) such sale, transfer, lease, contribution or conveyance
     constitutes (i) an Investment permitted under Section 7.2.5, (ii) a Lien
     permitted under Section 7.2.3, or (iii) a Restricted Payment permitted
     under Section 7.2.6;

          (c) (i) such sale, transfer, lease, contribution or conveyance of
     such assets is for fair market value and the consideration consists of no
     less than 75% in cash or is a Lien permitted under Section 7.2.3(h)(iii),
     (ii) the Net Disposition Proceeds received from such assets, together with
     the Net Disposition Proceeds of all other assets sold, transferred,
     leased, contributed or conveyed pursuant to this clause (c) since the
     Closing Date (but excluding any Net Disposition Proceeds received from the
     sale to Merck & Co. by the Borrower and/or any of its Restricted
     Subsidiaries of the two islands in the Florida Keys that were previously
     used by them to study a non-human primate breeding colony), does not
     exceed (individually or in the aggregate) $20,000,000 over the term of
     this Agreement and (iii) an amount equal to the Net Disposition Proceeds
     generated from such sale, transfer, lease (except leases or subleases
     pursuant to Section 7.2.3(i)), contribution or conveyance, is reinvested
     in the Business of the Borrower and its Restricted Subsidiaries or, to the
     extent required thereunder, is applied to prepay the Loans pursuant to the
     terms of Section 3.1.1 and Section 3.1.2;

          (d) such sale, transfer, lease, contribution or conveyance results
     from a casualty or condemnation in respect of such property or assets; or

          (e) such sale, transfer or conveyance consists of the sale or
     discount of overdue accounts receivable in the ordinary course of
     business, but only in connection with the compromise or collection
     thereof.

     SECTION 7.2.10. Modification of Certain Agreements. Without the prior
written consent of the Required Lenders, the Borrower will not, and will not
permit any of its Restricted Subsidiaries to, consent to any amendment,
supplement, amendment and restatement, waiver or




                                      -98-

<PAGE>


other modification of any of the terms or provisions contained in, or
applicable to, any Senior Subordinated Debt Document (including any agreement
or indenture related thereto or to the Subordinated Debt Issuance) or any
Material Document or any schedules, exhibits or agreements related thereto (the
"Restricted Agreements"), in each case which would materially adversely affect
the rights or remedies of the Lenders, or the Borrower's or any other Obligor's
ability to perform hereunder or under any Loan Document or which would (a)
increase the cash consideration payable in respect of the Recapitalization,
(b), in the case of the Recapitalization Agreement, increase the Borrower's or
any of its Restricted Subsidiaries' obligations or liabilities, contingent or
otherwise (other than adjustments to the cash consideration payable in respect
of the Acquisition made pursuant to the terms of the Recapitalization
Agreement), (c) increase the principal amount of, or increase the interest rate
on, or add or increase any fee with respect to the Indebtedness evidence by
such Senior Subordinated Debt or any such Restricted Agreement, advance any
dates upon which payments of principal or interest are due thereon or change
any of the covenants with respect thereto in a manner which is more restrictive
to the Borrower or any of its Restricted Subsidiaries or (d) in the case of any
Senior Subordinated Debt Document, change the subordination provisions thereof
(including any default or conditions to an event of default relating thereto),
or change any collateral therefor (other than to release such collateral), if
(in the case of this clause (d)), the effect of such amendment or change,
individually or together with all other amendments or changes made, is to
increase the obligations of the obligor thereunder or to confer any additional
rights on the holders of such Senior Subordinated Debt, or any such Restricted
Agreement (or a trustee or other representative on their behalf).

     SECTION 7.2.11. Transactions with Affiliates. The Borrower will not, and
will not permit any of its Restricted Subsidiaries to, enter into, or cause,
suffer or permit to exist any arrangement or contract with any of its other
Affiliates (other than any Obligor or any other Restricted Subsidiary of the
Borrower) unless such arrangement or contract is fair and equitable to the
Borrower or such Restricted Subsidiary and is an arrangement or contract of the
kind which would be entered into by a prudent Person in the position of the
Borrower or such Restricted Subsidiary with a Person which is not one of its
Affiliates; provided, however that the Borrower and its Restricted Subsidiaries
shall be permitted to (i) enter into and perform their obligations, or take any
actions contemplated or permitted, under the Transaction Documents (including
the Investors' Agreement), (ii) make any Restricted Payment permitted under
Section 7.2.6 and (iii) enter into and perform their obligations under
arrangements with DLJ and its Affiliates for underwriting, investment banking
and advisory services (including payments of the fees in respect of advisory
services referred to in clause (c)(i) of Section 7.2.6) on usual and customary
terms, (iv) make payment of reasonable and customary fees and reimbursement of
expenses payable to directors of Holdco and (v) enter into employment
arrangements with respect to the procurement of services of directors, officers
and employees in the ordinary course of business and pay reasonable fees in
connection therewith.





                                      -99-

<PAGE>


     SECTION 7.2.12. Negative Pledges, Restrictive Agreements, etc. The
Borrower will not, and will not permit any of its Restricted Subsidiaries to,
enter into any agreement prohibiting

          (a) the (i) creation or assumption of any Lien upon its properties,
     revenues or assets, whether now owned or hereafter acquired securing any
     Obligation or any senior refinancing thereof (other than, in the case of
     any assets acquired with the proceeds of any Indebtedness permitted under
     Section 7.2.2(c), customary limitations and prohibitions contained in such
     Indebtedness and in the case of any Indebtedness permitted under clauses
     (f), (h), (i) and (j) of Section 7.2.2, customary limitations in respect
     of the Foreign Subsidiaries of the Borrower that are Restricted
     Subsidiaries that shall have incurred such Indebtedness and its assets),
     or (ii) ability of the Borrower or any other Obligor to amend or otherwise
     modify this Agreement or any other Loan Document; or

          (b) any Restricted Subsidiary from making any payments, directly or
     indirectly, to the Borrower by way of dividends, advances, repayments of
     loans or advances, reimbursements of management and other intercompany
     charges, expenses and accruals or other returns on investments, or any
     other agreement or arrangement which restricts the ability of any such
     Restricted Subsidiary to make any payment, directly or indirectly, to the
     Borrower (other than customary limitations and prohibitions in any
     Indebtedness permitted under clauses (b), (e), (g), (h) and (i) of Section
     7.2.2 that are applicable to the Restricted Subsidiary of the Borrower
     that has incurred such Indebtedness and its assets; provided, that such
     limitations shall be limited solely to such Restricted Subsidiary (and any
     of its Restricted Subsidiaries) and its (and their) assets).

     SECTION 7.2.13. Securities of Subsidiaries. The Borrower will not permit
any Restricted Subsidiary to issue any Capital Stock (whether for value or
otherwise) to any Person other than the Borrower or another wholly-owned
Subsidiary of the Borrower that is a Restricted Subsidiary.

     SECTION 7.2.14. Sale and Leaseback. The Borrower will not, and will not
permit any of its Restricted Subsidiaries to, enter into any agreement or
arrangement with any other Person providing for the leasing by the Borrower or
any of its Restricted Subsidiaries of real or personal property which has been
or is to be sold or transferred by the Borrower or any of its Restricted
Subsidiaries to such other Person or to any other Person to whom funds have
been or are to be advanced by such Person on the security of such property or
rental obligations of the Borrower or any of its Restricted Subsidiaries.

     SECTION 7.2.15. Designation of Senior Indebtedness. The Borrower will not
permit any Indebtedness (other than the Indebtedness incurred hereunder or
under any other the Loan Document) to constitute "Designated Senior
Indebtedness" (or any other similar term) under the Senior Subordinated Debt
Documents, without the consent of the Required Lenders.





                                     -100-

<PAGE>


                                  ARTICLE VIII

                               EVENTS OF DEFAULT

     SECTION 8.1. Listing of Events of Default. Each of the following events or
occurrences described in this Section 8.1 shall constitute an "Event of
Default".

     SECTION 8.1.1. Non-Payment of Obligations. (a) The Borrower shall default
in the payment or prepayment of any principal of any Loan when due or any
Reimbursement Obligations or any deposit of cash for collateral purposes
pursuant to Section 2.6.4, as the case may be, or (b) any Obligor (including
the Borrower) shall default (and such default shall continue unremedied for a
period of three Business Days) in the payment when due of any interest or
commitment fee with respect to the Loans or Commitments or of any other
monetary Obligation.

     SECTION 8.1.2. Breach of Warranty. Any representation or warranty of the
Borrower or any other Obligor made or deemed to be made hereunder or in any
other Loan Document executed by it or any other writing or certificate
(including the Closing Date Certificate) furnished by or on behalf of the
Borrower or any other Obligor to the Agents, the Issuers, the Lead Arranger or
any Lender for the purposes of or in connection with this Agreement or any such
other Loan Document (including any certificates delivered pursuant to Article
V) is or shall be incorrect when made in any material respect.

     SECTION 8.1.3. Non-Performance of Certain Covenants and Obligations. The
Borrower shall default in the due performance and observance of any of its
obligations under Sections 7.1.1(e), 7.1.7(b), 7.1.9, 7.1.10, 7.1.11, 7.1.12 or
7.2 (other than Section 7.2.1).

     SECTION 8.1.4. Non-Performance of Other Covenants and Obligations. Any
Obligor shall default in the due performance and observance of any other
agreement contained herein or in any other Loan Document executed by it, and
such default shall continue unremedied for a period of 30 days after notice
thereof shall have been given to the Borrower by the Administrative Agent at
the direction of the Required Lenders.

     SECTION 8.1.5. Default on Other Indebtedness. A default shall occur (i) in
the payment when due (subject to any applicable grace period), whether by
acceleration or otherwise, of any Indebtedness, other than Indebtedness
described in Section 8.1.1, of the Borrower or any of its Restricted
Subsidiaries or Holdco having a principal amount, individually or in the
aggregate for Holdco, the Borrower and its Restricted Subsidiaries, in excess
of $5,000,000, or (ii) a default shall occur in the performance or observance
of any obligation or condition with respect to such Indebtedness having a
principal amount, individually or in the aggregate, in excess of $5,000,000 if
the effect of such default is to accelerate the maturity of any such
Indebtedness or such default shall continue unremedied for any applicable
period of time sufficient to permit the holder or




                                     -101-

<PAGE>


holders of such Indebtedness, or any trustee or agent for such holders, to
cause such Indebtedness to become due and payable prior to its expressed
maturity.

     SECTION 8.1.6. Judgments. Any judgment or order for the payment of money
in excess of $5,000,000 in the aggregate for Holdco, the Borrower and its
Restricted Subsidiaries (not covered by insurance from a responsible insurance
company that is not denying its liability with respect thereto) shall be
rendered against the Borrower or any of its Restricted Subsidiaries or Holdco
and remain unvacated and unpaid and either (i) enforcement proceedings shall
have been commenced by any creditor upon such judgment or order, or (ii) there
shall be any period of 30 consecutive days during which a stay of enforcement
of such judgment or order, by reason of a pending appeal or otherwise, shall
not be in effect.

     SECTION 8.1.7. Pension Plans. Any of the following events shall occur with
respect to any Pension Plan (i) the termination of any Pension Plan if, as a
result of such termination, the Borrower would be required to make a
contribution to such Pension Plan, or would reasonably expect to incur a
liability or obligation to such Pension Plan, in excess of $5,000,000, or (ii)
a contribution failure occurs with respect to any Pension Plan sufficient to
give rise to a Lien under Section 302(f) of ERISA in an amount in excess of
$5,000,000.

     SECTION 8.1.8. Change in Control. Any Change in Control shall occur.

     SECTION 8.1.9. Bankruptcy, Insolvency, etc. The Borrower or any of its
Restricted Subsidiaries (other than Subsidiaries that are not Material
Subsidiaries) or any other Obligor shall

          (a) become insolvent or generally fail to pay, or admit in writing
     its inability to pay, debts as they become due;

          (b) apply for, consent to, or acquiesce in, the appointment of a
     trustee, receiver, sequestrator or other custodian for the Borrower or any
     of its Restricted Subsidiaries (other than Subsidiaries that are not
     Material Subsidiaries) or any other Obligor or any material property of
     any thereof, or make a general assignment for the benefit of creditors;

          (c) in the absence of such application, consent, acquiescence or
     assignment, permit or suffer to exist the appointment of a trustee,
     receiver, sequestrator or other custodian for the Borrower or any of its
     Restricted Subsidiaries (other than Subsidiaries that are not Material
     Subsidiaries) or any other Obligor or for a substantial part of the
     property of any thereof, and such trustee, receiver, sequestrator or other
     custodian shall not be discharged within 60 days, provided that the
     Borrower, each such Restricted Subsidiary and each other Obligor hereby
     expressly authorizes the Agents, the Issuers




                                     -102-

<PAGE>


     and each Lender to appear in any court conducting any relevant proceeding
     during such 60-day period to preserve, protect and defend their rights
     under the Loan Documents;

          (d) permit or suffer to exist the commencement of any bankruptcy,
     reorganization, debt arrangement or other case or proceeding under any
     bankruptcy or insolvency law, or any dissolution, winding up or
     liquidation proceeding, in respect of the Borrower or any of its
     Restricted Subsidiaries (other than Subsidiaries that are not Material
     Subsidiaries) or any other Obligor, and, if any such case or proceeding is
     not commenced by the Borrower or such Restricted Subsidiary or such other
     Obligor, such case or proceeding shall be consented to or acquiesced in by
     the Borrower or such Restricted Subsidiary or such other Obligor or shall
     result in the entry of an order for relief or shall remain for 60 days
     undismissed, provided that the Borrower, such Restricted Subsidiary and
     each other Obligor hereby expressly authorizes the Agents, the Issuers and
     each Lender to appear in any court conducting any such case or proceeding
     during such 60-day period to preserve, protect and defend their rights
     under the Loan Documents; or

          (e) take any action (corporate or otherwise) authorizing, or in
     furtherance of, any of the foregoing.

     SECTION 8.1.10. Impairment of Security, etc. Any Loan Document, or any
Lien granted thereunder, shall (except in accordance with its terms or pursuant
to an agreement of the parties thereto), in whole or in part, terminate, cease
to be in full force and effect or cease to be the legally valid, binding and
enforceable obligation of any Obligor party thereto; the Borrower or any other
Obligor shall, directly or indirectly, contest in any manner the effectiveness,
validity, binding nature or enforceability thereof; or any Lien securing any
Obligation shall, in whole or in part, cease to be a perfected first priority
Lien, subject only to those exceptions expressly permitted by the Loan
Documents, except to the extent any event referred to above (a) relates to
assets of the Borrower or any of its Restricted Subsidiaries which are
immaterial, (b) results from the failure of the Administrative Agent to
maintain possession of certificates representing securities pledged under any
Pledge Agreement or to file continuation statements under the UCC of any
applicable jurisdiction or (c) is covered by a lender's title insurance policy
and the relevant insurer promptly after the occurrence thereof shall have
acknowledged in writing that the same is covered by such title insurance
policy.

     SECTION 8.1.11. Subordinated Notes. The subordination provisions relating
to the Senior Subordinated Notes or any other subordinated debt of the Borrower
or any of its Restricted Subsidiaries (the "Subordination Provisions") shall
fail to be enforceable by the Lenders (which have not effectively waived the
benefits thereof) in accordance with the terms thereof, or the principal or
interest on any Loan, Reimbursement Obligation or other Obligations shall fail
to constitute "Senior Indebtedness" (as defined in any Senior Subordinated
Note) or "senior indebtedness" (or any other similar term) under any document
instrument or agreement




                                     -103-

<PAGE>


evidencing any such other subordinated debt; or the Borrower or any of its
Subsidiaries shall, directly or indirectly, disavow or contest in any manner
(i) the effectiveness, validity or enforceability of any of the Subordination
Provisions, or (ii) that any of such Subordination Provisions exist for the
benefit of the Agents and the Lenders.

     SECTION 8.2. Action if Bankruptcy, etc. If any Event of Default described
in clauses (b), (c) and (d) of Section 8.1.9 shall occur with respect to any
Obligor (other than Subsidiaries that are not Material Subsidiaries), the
Commitments (if not theretofore terminated) shall automatically terminate and
the outstanding principal amount of all outstanding Loans and all other
Obligations (including Reimbursement Obligations) shall automatically be and
become immediately due and payable, without notice or demand and the Borrower
shall automatically and immediately be obligated to deposit with the
Administrative Agent cash collateral in an amount equal to all Letter of Credit
Outstandings.

     SECTION 8.3. Action if Other Event of Default. If any Event of Default
(other than an Event of Default described in clauses (b), (c) and (d) of
Section 8.1.9 with respect to any Obligor (other than Subsidiaries that are not
Material Subsidiaries)) shall occur for any reason, whether voluntary or
involuntary, and be continuing, the Administrative Agent, upon the direction of
the Required Lenders, shall by notice to the Borrower declare all or any
portion of the outstanding principal amount of the Loans and other Obligations
(including Reimbursement Obligations) to be due and payable, require the
Borrower to provide cash collateral to be deposited with the Administrative
Agent in an amount equal to the undrawn amount of all Letters of Credit
outstanding and/or declare the Commitments (if not theretofore terminated) to
be terminated, whereupon the full unpaid amount of such Loans and other
Obligations which shall be so declared due and payable shall be and become
immediately due and payable, without further notice, demand or presentment,
and/or, as the case may be, the Commitments shall terminate and the Borrower
shall deposit with the Administrative Agent cash collateral in an amount equal
to all Letters of Credit Outstandings.

                                   ARTICLE IX

                                   THE AGENTS

     SECTION 9.1. Actions. Each Lender hereby appoints DLJ as its Syndication
Agent and UBOC as its Administrative Agent under and for purposes of this
Agreement and each other Loan Document. Each Lender authorizes the Agents to
act on behalf of such Lender under this Agreement and each other Loan Document
and, in the absence of other written instructions from the Required Lenders
received from time to time by the Agents (with respect to which each of the
Agents agrees that it will comply, except as otherwise provided in this Section
or as otherwise advised by counsel), to exercise such powers hereunder and
thereunder as are specifically delegated to or required of the Agents by the
terms hereof and thereof, together with




                                     -104-

<PAGE>


such powers as may be reasonably incidental thereto. Each Lender hereby
indemnifies (which indemnity shall survive any termination of this Agreement)
the Agents, ratably in accordance with their respective Term Loans outstanding
and Commitments (or, if no Term Loans or Commitments are at the time
outstanding and in effect, then ratably in accordance with the principal amount
of Term Loans held by such Lender and their respective Commitments as in effect
in each case on the date of the termination of this Agreement), from and
against any and all liabilities, obligations, losses, damages, claims, costs or
expenses of any kind or nature whatsoever which may at any time be imposed on,
incurred by, or asserted against, either of the Agents in any way relating to
or arising out of this Agreement and any other Loan Document, including
reasonable attorneys' fees, and as to which any Agent is not reimbursed by the
Borrower or any other Obligor (and without limiting the obligation of the
Borrower or any other Obligor to do so); provided, however, that no Lender
shall be liable for the payment of any portion of such liabilities,
obligations, losses, damages, claims, costs or expenses which are determined by
a court of competent jurisdiction in a final proceeding to have resulted solely
from such Agent's gross negligence or willful misconduct. The Agents shall not
be required to take any action hereunder or under any other Loan Document, or
to prosecute or defend any suit in respect of this Agreement or any other Loan
Document, unless it is indemnified hereunder to its satisfaction. If any
indemnity in favor of either of the Agents shall be or become, in such Agent's
determination, inadequate, such Agent may call for additional indemnification
from the Lenders and cease to do the acts indemnified against hereunder until
such additional indemnity is given. The Borrower and the Lenders agree that the
Administrative Agent may delegate any of its duties under this Agreement to any
of its Affiliates. Any such Affiliate (and such Affiliate's directors,
officers, agents and employees) which performs duties in connection with this
Agreement shall be entitled to the same benefits of the indemnification, waiver
and other protective provisions to which such Agent is entitled under Articles
IX and X.

     SECTION 9.2. Funding Reliance, etc. Unless the Administrative Agent shall
have been notified by telephone, confirmed in writing, by any Lender by 1:00
p.m., Los Angeles time, on the Business day prior to a Borrowing or
disbursement with respect to a Letter of Credit pursuant to Section 2.6.2 that
such Lender will not make available the amount which would constitute its
Percentage of such Borrowing on the date specified therefor, the Administrative
Agent may assume that such Lender has made such amount available to the
Administrative Agent and, in reliance upon such assumption, make available to
the Borrower a corresponding amount. If and to the extent that such Lender
shall not have made such amount available to the Administrative Agent, such
Lender severally agrees and the Borrower agrees to repay the Administrative
Agent forthwith on demand such corresponding amount together with interest
thereon, for each day from the date the Administrative Agent made such amount
available to the Borrower to the date such amount is repaid to the
Administrative Agent, at the interest rate applicable at the time to Loans
comprising such Borrowing.

     SECTION 9.3. Exculpation; Notice of Default. (a) None of the Agents or the
Lead Arranger nor any of their respective directors, officers, employees or
agents shall be liable to any




                                     -105-

<PAGE>


Lender for any action taken or omitted to be taken by it under this Agreement
or any other Loan Document, or in connection herewith or therewith, except for
its own willful misconduct or gross negligence, nor responsible for any
recitals or warranties herein or therein, nor for the effectiveness,
enforceability, validity or due execution of this Agreement or any other Loan
Document, nor for the creation, perfection or priority of any Liens purported
to be created by any of the Loan Documents, or the validity, genuineness,
enforceability, existence, value or sufficiency of any collateral security, nor
to make any inquiry respecting the performance by the Borrower of its
obligations hereunder or under any other Loan Document. Any such inquiry which
may be made by any Agent or any Issuer shall not obligate it to make any
further inquiry or to take any action. The Agents and each Issuer shall be
entitled to rely upon advice of counsel concerning legal matters and upon any
notice, consent, certificate, statement or writing which the Agents or the
Issuers, as applicable, believe to be genuine and to have been presented by a
proper Person.

     (b) No Agent shall be deemed to have knowledge or notice of the occurrence
of any Default or Event of Default hereunder unless such Agent has received
written notice from (A) in the case of the Administrative Agent, a Lender or
the Borrower referring to this Agreement describing such Default or Event of
Default and stating that such notice is a "notice of default" and (B) in the
case of the Syndication Agent, from the Administrative Agent as set forth in
the immediately following sentence. In the event that the Administrative Agent
receives such a notice, the Administrative Agent shall give prompt notice
thereof to the Syndication Agent and the Lenders.

     SECTION 9.4. Successor. The Syndication Agent may resign as such upon one
Business Day's notice to the Borrower and the Administrative Agent. The
Administrative Agent may resign as such at any time upon at least 30 days'
prior notice to the Borrower and all Lenders. If the Administrative Agent at
any time shall resign, the Required Lenders may, with the prior consent of the
Borrower (which consent shall not be unreasonably withheld), appoint another
Lender as a successor Administrative Agent which shall thereupon become the
Administrative Agent hereunder. If no successor Administrative Agent shall have
been so appointed by the Required Lenders, and shall have accepted such
appointment, within 30 days after the retiring Administrative Agent's giving
notice of resignation, then the retiring Administrative Agent may, on behalf of
the Lenders, appoint a successor Administrative Agent, which shall be one of
the Lenders or a commercial banking institution organized under the laws of the
United States or a United States branch or agency of a commercial banking
institution, and having a combined capital and surplus of at least
$500,000,000. Upon the acceptance of any appointment as Administrative Agent
hereunder by a successor Administrative Agent, such successor Administrative
Agent shall be entitled to receive from the retiring Administrative Agent such
documents of transfer and assignment as such successor Administrative Agent may
reasonably request, and shall thereupon succeed to and become vested with all
rights, powers, privileges and duties of the retiring Administrative Agent, and
the retiring Administrative Agent shall be discharged from its duties and
obligations under this Agreement. After any retiring




                                     -106-

<PAGE>


Administrative Agent's resignation hereunder as the Administrative Agent, the
provisions of (i) this Article IX shall inure to its benefit as to any actions
taken or omitted to be taken by it while it was the Administrative Agent under
this Agreement, and (ii) Section 10.3 and Section 10.4 shall continue to inure
to its benefit.

     SECTION 9.5. Credit Extensions by each Agent. Each Agent and each Issuer
shall have the same rights and powers with respect to (x) (i) in the case of an
Agent, the Credit Extensions made by it or any of its Affiliates and (ii) in
the case of an Issuer, the Loans made by it or any of its Affiliates, and (y)
the Notes held by it or any of its Affiliates as any other Lender and may
exercise the same as if it were not an Agent or Issuer. Each Agent, each Issuer
and each of their respective Affiliates may accept deposits from, lend money
to, and generally engage in any kind of business with the Borrower or any
Subsidiary or Affiliate of the Borrower as if such Agent or Issuer were not an
Agent or Issuer hereunder.

     SECTION 9.6. Credit Decisions. Each Lender acknowledges that it has,
independently of each Agent, the Lead Arranger, each Issuer and each other
Lender, and based on such Lender's review of the financial information of the
Borrower, this Agreement, the other Loan Documents (the terms and provisions of
which being satisfactory to such Lender) and such other documents, information
and investigations as such Lender has deemed appropriate, made its own credit
decision to extend its Commitments. Each Lender also acknowledges that it will,
independently of each Agent, the Lead Arranger, each Issuer and each other
Lender, and based on such other documents, information and investigations as it
shall deem appropriate at any time, continue to make its own credit decisions
as to exercising or not exercising from time to time any rights and privileges
available to it under this Agreement or any other Loan Document.

     SECTION 9.7. Copies, etc. The Administrative Agent shall give prompt
notice to each Lender of each notice or request required or permitted to be
given to the Administrative Agent by the Borrower pursuant to the terms of this
Agreement (unless concurrently delivered to the Lenders by the Borrower). The
Administrative Agent will distribute to each Lender each document or instrument
received for such Lender's account and copies of all other communications
received by the Administrative Agent from the Borrower for distribution to the
Lenders by the Administrative Agent in accordance with the terms of this
Agreement.

     SECTION 9.8. The Syndication Agent and the Administrative Agent.
Notwithstanding anything else to the contrary contained in this Agreement or
any other Loan Document, the Agents, in their respective capacities as such,
each in such capacity, shall have no duties or responsibilities under this
Agreement or any other Loan Document nor any fiduciary relationship with any
Lender, and no implied covenants, functions, responsibilities, duties,
obligations or liabilities shall be read into this Agreement or otherwise exist
against either Agent, as applicable, in such capacity except as are explicitly
set forth herein or in the other Loan Documents.





                                     -107-

<PAGE>


     SECTION 9.9. Documentation Agent. The Lender identified on the signature
pages of this Agreement as the "Documentation Agent" shall not have any right,
power, obligation, liability, responsibility or duty under this Agreement (or
any other Loan Document) other than those applicable to all Lenders as such.
Without limiting the foregoing, the Lender so identified as the "Documentation
Agent" shall not have or be deemed to have any fiduciary relationship with any
other Lender. Each Lender acknowledges that it has not relied, and will not
rely, on the Lender so identified as the "Documentation Agent" in deciding to
enter into this Agreement and each other Loan Document to which it is a party
or in taking or not taking action hereunder or thereunder.

                                   ARTICLE X

                            MISCELLANEOUS PROVISIONS

     SECTION 10.1. Waivers, Amendments, etc. The provisions of this Agreement
and of each other Loan Document may from time to time be amended, modified or
waived, if such amendment, modification or waiver is in writing and consented
to by the Borrower and each Obligor party thereto and by the Required Lenders;
provided, however, that any such amendment, modification or waiver of the type
set forth below shall require the consent of the Person or Persons described
below for such amendment, modification or waiver:

          (a) Unless consented to by each Lender, no such amendment,
     modification or waiver shall be effective if it would modify any
     requirement hereunder that any particular action be taken by all the
     Lenders, all the Lenders with respect to any Tranche of Loans or
     Commitments or by the Required Lenders, release Holdco from its
     obligations under the Holdco Guaranty and Pledge Agreement, release any
     Subsidiary Guarantor that is a Material Subsidiary from its obligations
     under the Subsidiary Guaranty (except as otherwise provided in the
     Subsidiary Guaranty), if any, or release all or substantially all of the
     collateral security (except in each case as otherwise specifically
     provided in this Agreement, any such Subsidiary Guaranty or a Pledge
     Agreement).

          (b) Unless consented to by each Lender adversely affected thereby, no
     such amendment, modification or waiver shall be effective if it would
     modify this Section 10.1, or clause (i) of Section 10.10, change the
     definition of "Required Lenders", increase any Commitment Amount or the
     Percentage of any Lender (other than pursuant to clause (c) of Section
     2.1.2), reduce any fees described in Section 3.3 (other than the
     administration fee referred to in Section 3.3.2) or extend any Commitment
     Termination Date.

          (c) No such amendment, modification or waiver shall be effective if
     it would extend the Stated Maturity Date for any Loan or reduce the
     principal amount of or rate of




                                     -108-

<PAGE>


     interest on or fees payable in respect of any Loan or any Reimbursement
     Obligations (which shall in each case include the conversion of all or any
     part of the Obligations into equity of any Obligor), unless such
     amendment, modification or waiver shall have been consented to by the
     Lender which has made such Loan or, in the case of a Reimbursement
     Obligation, the Issuer owed, and those Lenders participating in, such
     Reimbursement Obligation.

          (d) No such amendment, modification or waiver shall be effective if
     it would affect adversely the interests, rights or obligations of any
     Agent, Issuer or Lead Arranger (in its capacity as Agent, Issuer or Lead
     Arranger), unless such amendment, modification or waiver shall have been
     consented to by such Agent, Issuer or Lead Arranger, as the case may be.

          (e) No such amendment, modification or waiver shall be effective if
     it would have the effect (either immediately or at some later time) of
     enabling the Borrower to satisfy a condition precedent to the making of a
     Revolving Loan or the issuance of a Letter of Credit unless such
     amendment, modification or waiver shall have been consented to by the
     holders of at least 51% of the Revolving Loan Commitments.

          (f) No such amendment, modification or waiver shall be effective if
     it would amend, modify or waive the provisions of clause (a)(i) of Section
     3.1.1 or clause (b) of Section 3.1.2 or effect any amendment, modification
     or waiver that by its terms adversely affects the rights of Lenders
     participating in any Tranche differently from those of Lenders
     participating in other Tranches, unless such amendment, modification or
     waiver shall have been consented to by the holders of at least 51% of the
     aggregate amount of Loans outstanding under the Tranche or Tranches
     affected by such modification, or, in the case of a modification affecting
     the Revolving Loan Commitments, the Lenders holding at least 51% of the
     Revolving Loan Commitments.

No failure or delay on the part of any Agent, any Issuer, any Lender or any
other Secured Party in exercising any power or right under this Agreement or
any other Loan Document shall operate as a waiver thereof, nor shall any single
or partial exercise of any such power or right preclude any other or further
exercise thereof or the exercise of any other power or right. No notice to or
demand on the Borrower in any case shall entitle it to any notice or demand in
similar or other circumstances. No waiver or approval by any Agent, any Issuer
or any Lender under this Agreement or any other Loan Document shall, except as
may be otherwise stated in such waiver or approval, be applicable to subsequent
transactions. No waiver or approval hereunder shall require any similar or
dissimilar waiver or approval thereafter to be granted hereunder.

     For purposes of this Section 10.1, the Syndication Agent, in coordination
with the Administrative Agent, shall have primary responsibility, together with
the Borrower, in the negotiation, preparation and documentation relating to any
amendment, modification or waiver




                                     -109-

<PAGE>


under this Agreement, any other Loan Document or any other agreement or
document related hereto or thereto contemplated pursuant to this Section.

     SECTION 10.2. Notices. All notices and other communications provided to
any party under this Agreement or any other Loan Document shall be in writing
or by facsimile and addressed, delivered or transmitted to such party (a) in
the case of any Lender by any party other than the Administrative Agent, to
such Lender in care of the Administrative Agent at its address or facsimile
number set forth on its signature page hereto or on Schedule II hereto (and the
Administrative Agent shall promptly forward such notice to the address or
facsimile number of such Lender set forth on such Lender's signature page
hereto or on Schedule II hereto or in the Lender Assignment Agreement pursuant
to which such Lender became a Lender hereunder), (b) in the case of any Lender
by the Administrative Agent, to such Lender at its address or facsimile number
set forth on its signature page hereto or in the Lender Assignment Agreement
pursuant to which it became a party hereto, (c) in the case of any Agent, at
its address or facsimile number set forth below its signature hereto, and (d)
in the case of the Borrower, to its address or facsimile number set forth on
its signature page hereto, or, in any case, at such address or facsimile number
as may be designated by such party in a notice to the other parties. Any
notice, if mailed and properly addressed with postage prepaid or if properly
addressed and sent by pre-paid courier service, shall be deemed given when
received; any notice, if transmitted by facsimile, shall be deemed given when
transmitted (receipt acknowledged).

     SECTION 10.3. Payment of Costs and Expenses. The Borrower agrees to pay on
demand all reasonable expenses of each of the Agents (including the reasonable
fees and out-of-pocket expenses of counsel to the Agents and of local or
foreign counsel, if any, who may be retained by counsel to the Agents) in
connection with

          (a) the syndication by the Syndication Agent and the Lead Arranger of
     the Loans, the negotiation, preparation, execution and delivery of this
     Agreement and of each other Loan Document, including schedules and
     exhibits, and any amendments, waivers, consents, supplements or other
     modifications to this Agreement or any other Loan Document as may from
     time to time hereafter be required, whether or not the transactions
     contemplated hereby are consummated;

          (b) the filing, recording, refiling or rerecording of each Mortgage
     and each Pledge Agreement and/or any UCC financing statements relating
     thereto and all amendments, supplements and modifications to any thereof
     and any and all other documents or instruments of further assurance
     required to be filed or recorded or refiled or rerecorded by the terms
     hereof or of such Mortgage or Pledge Agreement; and

          (c) the preparation and review of the form of any document or
     instrument relevant to this Agreement or any other Loan Document.





                                     -110-

<PAGE>


The Borrower further agrees to pay, and to save the Agents, the Issuers and the
Lenders harmless from all liability for, any stamp or other similar taxes which
may be payable in connection with the execution or delivery of this Agreement,
the Credit Extensions made hereunder or the issuance of any Notes or Letters of
Credit or any other Loan Documents. The Borrower also agrees to reimburse each
Agent, each Issuer and each Lender upon demand for all reasonable out-of-pocket
expenses (including reasonable attorneys' fees and legal expenses) incurred by
such Agent, such Issuer or such Lender in connection with (x) the negotiation
of any restructuring or "work-out", whether or not consummated, of any
Obligations and (y) the enforcement of any Obligations.

     SECTION 10.4. Indemnification. In consideration of the execution and
delivery of this Agreement by each Lender and the extension of the Commitments,
the Borrower hereby, to the fullest extent permitted under applicable law,
indemnifies, exonerates and holds each Agent, each Issuer, the Lead Arranger
and each Lender and each of their respective Affiliates, and each of their
respective partners, officers, directors, employees and agents, and each other
Person controlling any of the foregoing within the meaning of either Section 15
of the Securities Act of 1933, as amended, or Section 20 of the Securities
Exchange Act of 1934, as amended (collectively, the "Indemnified Parties"),
free and harmless from and against any and all actions, causes of action,
suits, losses, costs, liabilities and damages, and expenses actually incurred
in connection therewith (irrespective of whether any such Indemnified Party is
a party to the action for which indemnification hereunder is sought), including
reasonable attorneys' fees and disbursements (collectively, the "Indemnified
Liabilities"), incurred by the Indemnified Parties or any of them as a result
of, or arising out of, or relating to

          (a) any transaction financed or to be financed in whole or in part,
     directly or indirectly, with the proceeds of any Credit Extension;

          (b) the entering into and performance of this Agreement and any other
     Loan Document by any of the Indemnified Parties (excluding any successful
     action brought by or on behalf of the Borrower as the result of any
     failure by any Lender to make any Credit Extension hereunder);

          (c) any investigation, litigation or proceeding related to any
     acquisition or proposed acquisition by the Borrower or any of its
     Subsidiaries of all or any portion of the Capital Stock or assets of any
     Person, whether or not such Agent, such Issuer, such Lead Arranger or such
     Lender is party thereto;

          (d) any alleged or actual investigation, litigation or proceeding
     related to any environmental cleanup, audit or noncompliance with or
     liability under any Environmental Law relating to the use, ownership or
     operation by Holdco, the Borrower or any of their respective Subsidiaries
     of any Hazardous Material; or





                                     -111-

<PAGE>


          (e) the presence on or under, or the escape, seepage, leakage,
     spillage, discharge, emission or release from, any real property owned or
     operated by Holdco, the Borrower or any Subsidiary thereof of any
     Hazardous Material present on or under such property in a manner giving
     rise to liability at or prior to the time Holdco, the Borrower or such
     Subsidiary owned or operated such property (including any losses,
     liabilities, damages, injuries, costs, expenses or claims asserted or
     arising under any Environmental Law), regardless of whether caused by, or
     within the control of, Holdco, the Borrower or such Subsidiary,

except for any such Indemnified Liabilities arising for the account of a
particular Indemnified Party by reason of the relevant Indemnified Party's
gross negligence or willful misconduct or any Hazardous Materials that are
manufactured, emitted, generated, treated, released, stored or disposed of on
any real property of the Borrower or any of its Subsidiaries or any violation
of Environmental Law that occurs on or with respect to any real property of the
Borrower or any of its Subsidiaries to the extent occurring after such real
property is transferred to any Indemnified Person or its successor by
foreclosure sale, deed in lieu of foreclosure, or similar transfer, except to
the extent such manufacture, emission, release, generation, treatment, storage
or disposal or violation is actually caused by Holdco, the Borrower or any of
the Borrower's Subsidiaries. The Borrower and its permitted successors and
assigns hereby waive, release and agree not to make any claim, or bring any
cost recovery action against, any Agent, any Issuer, the Lead Arranger or any
Lender under CERCLA or any state equivalent, or any similar law now existing or
hereafter enacted, except to the extent arising out of the gross negligence or
willful misconduct of any Indemnified Party or arising out of any Hazardous
Materials that are manufactured, emitted, generated, treated, released, stored
or disposed of on any real property of the Borrower or any of its Subsidiaries
or any violation of Environmental Law that occurs on or with respect to any
real property of the Borrower or any of its Subsidiaries to the extent
occurring after such real property is transferred to any Indemnified Person or
its successor by foreclosure sale, deed in lieu of foreclosure, or similar
transfer. It is expressly understood and agreed that to the extent that any
Indemnified Party is strictly liable under any Environmental Laws, the
Borrower's obligation to such Indemnified Party under this indemnity shall
likewise be without regard to fault on the part of the Borrower, to the extent
permitted under applicable law, with respect to the violation or condition
which results in liability of such Indemnified Party. Notwithstanding anything
to the contrary herein, each Agent, each Issuer, the Lead Arranger and each
Lender shall be responsible with respect to any Hazardous Materials that are
manufactured, emitted, generated, treated, released, stored or disposed of on
any real property of the Borrower or any of its Subsidiaries or any violation
of Environmental Law that occurs on or with respect to any such real property
to the extent it occurs after such real property is transferred to any Agent,
Issuer, Lead Arranger or Lender to its successor by foreclosure sale, deed in
lieu of foreclosure, or similar transfer, except to the extent such
manufacture, emission, release, generation, treatment, storage or disposal or
violation is actually caused by Holdco, the Borrower or any of the Borrower's
Subsidiaries. If and to the extent that the foregoing undertaking may be
unenforceable for any reason, the




                                     -112-

<PAGE>


Borrower hereby agrees to make the maximum contribution to the payment and
satisfaction of each of the Indemnified Liabilities which is permissible under
applicable law.

     SECTION 10.5. Survival. The obligations of the Borrower under Sections
4.3, 4.4, 4.5, 4.6, 10.3 and 10.4, and the obligations of the Lenders under
Sections 4.8 and 9.1, shall in each case survive any termination of this
Agreement, the payment in full of all Obligations and the termination of all
Commitments. The representations and warranties made by the Borrower and each
other Obligor in this Agreement and in each other Loan Document shall survive
the execution and delivery of this Agreement and each such other Loan Document.

     SECTION 10.6. Severability. Any provision of this Agreement or any other
Loan Document which is prohibited or unenforceable in any jurisdiction shall,
as to such provision and such jurisdiction, be ineffective to the extent of
such prohibition or unenforceability without invalidating the remaining
provisions of this Agreement or such Loan Document or affecting the validity or
enforceability of such provision in any other jurisdiction.

     SECTION 10.7. Headings. The various headings of this Agreement and of each
other Loan Document are inserted for convenience only and shall not affect the
meaning or interpretation of this Agreement or such other Loan Document or any
provisions hereof or thereof.

     SECTION 10.8. Execution in Counterparts, Effectiveness, etc. This
Agreement may be executed by the parties hereto in several counterparts, each
of which shall be deemed to be an original and all of which shall constitute
together but one and the same agreement.

     SECTION 10.9. Governing Law; Entire Agreement. THIS AGREEMENT, ANY NOTES
AND, EXCEPT TO THE EXTENT OTHERWISE EXPRESSLY PROVIDED THEREIN, EACH OTHER LOAN
DOCUMENT SHALL EACH BE DEEMED TO BE A CONTRACT MADE UNDER AND GOVERNED BY THE
INTERNAL LAWS OF THE STATE OF NEW YORK. This Agreement and the other Loan
Documents constitute the entire understanding among the parties hereto with
respect to the subject matter hereof and supersede any prior agreements,
written or oral, with respect thereto. Upon the execution and delivery of this
Agreement by the parties hereto, all obligations and liabilities of DLJ
Merchant Banking II, Inc. under or relating or with respect to the Commitment
Letter shall be terminated and of no further force or effect.

     SECTION 10.10. Successors and Assigns. This Agreement shall be binding
upon and shall inure to the benefit of the parties hereto and their respective
successors and assigns; provided, however, that (i) the Borrower may not assign
or transfer its rights or obligations hereunder without the prior written
consent of each of the Agents and all Lenders, and (ii) the rights of sale,
assignment and transfer of the Lenders are subject to Section 10.11.





                                     -113-

<PAGE>


     SECTION 10.11. Sale and Transfer of Loans and Notes; Participations in
Loans and Notes. Each Lender may assign, or sell participations in, its Loans
and Commitments to one or more other Persons, on a non pro rata basis (except
as provided below), in accordance with this Section 10.11.

     SECTION 10.11.1. Assignments. Any Lender (the "Assignor Lender"),

          (a) with the written consents of the Borrower, the Agents and (in the
     case of any assignment of participations in Letters of Credit or Revolving
     Loan Commitments) the Issuers (which consents (i) shall not be
     unreasonably delayed or withheld, (ii) of the Borrower shall not be
     required upon the occurrence and during the continuance of any Event of
     Default and (iii) of the Agents and the Issuers shall not be required in
     the case of assignments made by DLJ or any of its Affiliates), may at any
     time assign and delegate to one or more commercial banks, funds that are
     regularly engaged in making, purchasing or investing in loans or
     securities, or other financial institutions, and

          (b) with notice to the Borrower, the Agents, and (in the case of any
     assignment of participations in Letters of Credit or Revolving Loan
     Commitments) the Issuers, but without the consent of the Borrower, the
     Agents or the Issuers, may assign and delegate to any of its Affiliates or
     Related Funds or to any other Lender or any Affiliate or Related Fund of
     any other Lender

(each Person described in either of the foregoing clauses as being the Person
to whom such assignment and delegation is to be made, being hereinafter
referred to as an "Assignee Lender"), all or any fraction of such Assignor
Lender's Loans, participations in Letters of Credit and Letter of Credit
Outstandings with respect thereto and Commitments (which assignment and
delegation shall be, as among Revolving Loan Commitments, Revolving Loans and
participations in Letters of Credit, of a constant, and not a varying,
percentage) is in a minimum aggregate amount of (i) $2,000,000 (provided that
(1) assignments that are made on the same day to funds that (x) invest in
commercial loans and (y) are managed or advised by the same investment advisor
or any Affiliate of such investment advisor may be treated as a single
assignment for purposes of the minimum amount and (2) no minimum amount shall
be required in the case of any assignment between two Lenders so long as the
Assignor Lender has an aggregate amount of Loans and Commitments of at least
$2,000,000 following such assignment) unless the Borrower and the Agents
otherwise consent or (ii) the then remaining amount of such Assignor Lender's
Loans and Commitments; provided, however, that any such Assignee Lender will
comply, if applicable, with the provisions contained in Section 4.6 and the
Borrower, each other Obligor and the Agents shall be entitled to continue to
deal solely and directly with such Assignor Lender in connection with the
interests so assigned and delegated to an Assignee Lender until

          (c) written notice of such assignment and delegation, together with
     payment instructions, addresses and related information with respect to
     such Assignee Lender,




                                     -114-

<PAGE>


     shall have been given to the Borrower and the Agents by such Assignor
     Lender and such Assignee Lender;

          (d) such Assignee Lender shall have executed and delivered to the
     Borrower and the Agents a Lender Assignment Agreement, accepted by the
     Agents;

          (e) the processing fees described below shall have been paid; and

          (f) the Administrative Agent shall have registered such assignment
     and delegation in the Register pursuant to clause (b) of Section 2.7.

From and after the date that the Agents accept such Lender Assignment Agreement
and such assignment and delegation is registered pursuant to clause (b) of
Section 2.7, (x) the Assignee Lender thereunder shall be deemed automatically
to have become a party hereto and to the extent that rights and obligations
hereunder have been assigned and delegated to such Assignee Lender in
connection with such Lender Assignment Agreement, shall have the rights and
obligations of a Lender hereunder and under the other Loan Documents, and (y)
the Assignor Lender, to the extent that rights and obligations hereunder have
been assigned and delegated by it in connection with such Lender Assignment
Agreement, shall be released from its obligations hereunder and under the other
Loan Documents. Any Assignor Lender that shall have previously requested and
received any Note or Notes in respect of any Tranche to which any such
assignment applies shall, upon the acceptance by the Administrative Agent of
the applicable Lender Assignment Agreement, mark such Note or Notes "exchanged"
and deliver them to the Borrower (against, if the Assignor Lender has retained
Loans or Commitments with respect to the applicable Tranche and has requested
replacement Notes pursuant to clause (b)(ii) of Section 2.7, its receipt from
the Borrower of replacement Notes in the principal amount of the Loans and
Commitments of the applicable Tranche retained by it). Such Assignor Lender or
such Assignee Lender (unless the Assignor Lender or the Assignee Lender is DLJ
or one of its Affiliates) must also pay a processing fee to the Administrative
Agent upon delivery of any Lender Assignment Agreement in the amount of $2,500,
unless such assignment and delegation is by a Lender to its Affiliate or
Related Fund or if such assignment and delegation is by a Lender to a Federal
Reserve Bank, as provided below or is otherwise consented to by the
Administrative Agent. Any attempted assignment and delegation not made in
accordance with this Section 10.11.1 shall be null and void. Nothing contained
in this Section 10.11.1 shall prevent or prohibit any Lender from pledging its
rights (but not its obligations to make Loans or participate in Letters of
Credit of Letter of Credit Outstandings) under this Agreement and/or its Loans
hereunder to a Federal Reserve Bank in support of borrowings made by such
Lender from such Federal Reserve Bank and any Lender that is a fund that
invests in bank loans may pledge all or any portion of its rights (but not its
obligations to make Loans or participate in Letters of Credit or Letter of
Credit Outstandings) hereunder to any trustee or any other representative of
holders of obligations owed or securities issued by such fund as security for
such obligations or securities. In the event that S&P, Moody's or Thompson's
BankWatch (or InsuranceWatch Ratings Service, in the case of




                                     -115-

<PAGE>


Lenders that are insurance companies (or Best's Insurance Reports, if such
insurance company is not rated by Insurance Watch Ratings Service)) shall,
after the date that any Lender with a Commitment to make Revolving Loans or
participate in Letters of Credit becomes a Lender, downgrade the long-term
certificate of deposit rating or long-term senior unsecured debt rating of such
Lender, and the resulting rating shall be below BBB-, Baa3 or C (or BB, in the
case of Lender that is an insurance company (or B, in the case of an insurance
company not rated by InsuranceWatch Ratings Service)) respectively, then the
applicable Issuer or the Borrower shall have the right, but not the obligation,
upon notice to such Lender and the Agents, to replace such Lender with an
Assignee Lender in accordance with and subject to the restrictions contained in
this Section, and such Lender hereby agrees to transfer and assign without
recourse (in accordance with and subject to the restrictions contained in this
Section) all its interests, rights and obligations in respect of its Revolving
Loan Commitment under this Agreement to such Assignee Lender; provided,
however, that (i) no such assignment shall conflict with any law, regulation or
order of any governmental authority and (ii) such Assignee Lender shall pay to
such Lender in immediately available funds on the date of such assignment the
principal of and interest and fees (if any) accrued to the date of payment on
the Loans made, and Letters of Credit participated in, by such Lender hereunder
and all other amounts accrued for such Lender's account or owed to it
hereunder.

     SECTION 10.11.2. Participations. Any Lender may at any time sell to one or
more commercial banks or other Persons (each such commercial bank and other
Person being herein called a "Participant") participating interests in any of
the Loans, Commitments, participations in Letters of Credit and Letters of
Credit Outstandings or other interests of such Lender hereunder; provided,
however, that

          (a) no participation contemplated in this Section shall relieve such
     Lender from its Commitments or its other obligations hereunder or under
     any other Loan Document;

          (b) such Lender shall remain solely responsible for the performance
     of its Commitments and such other obligations;

          (c) the Borrower and each other Obligor and the Agents shall continue
     to deal solely and directly with such Lender in connection with such
     Lender's rights and obligations under this Agreement and each of the other
     Loan Documents;

          (d) no Participant, unless such Participant is an Affiliate of such
     Lender, or is itself a Lender, shall be entitled to require such Lender to
     take or refrain from taking any action hereunder or under any other Loan
     Document, except that such Lender may agree with any Participant that such
     Lender will not, without such Participant's consent, agree to (i) any
     reduction in the interest rate or amount of fees that such Participant is
     otherwise entitled to, (ii) a decrease in the principal amount, or an
     extension of the final Stated Maturity Date, of any Loan in which such
     Participant has purchased a participating




                                     -116-

<PAGE>


     interest or (iii) a release of all or substantially all of the collateral
     security under the Loan Documents or any Material Subsidiary that is a
     Subsidiary Guarantor under the Subsidiary Guaranty, in each case except as
     otherwise specifically provided in a Loan Document; and

          (e) the Borrower shall not be required to pay any amount under
     Sections 4.3, 4.4, 4.5, 4.6, 10.3 and 10.4 that is greater than the amount
     which it would have been required to pay had no participating interest
     been sold.

The Borrower acknowledges and agrees, subject to clause (e) above, that, to the
fullest extent permitted under applicable law, each Participant, for purposes
of Sections 4.3, 4.4, 4.5, 4.6, 4.8, 4.9, 10.3 and 10.4, shall be considered a
Lender.

     SECTION 10.12. Other Transactions. Nothing contained herein shall preclude
any Agent or any other Lender from engaging in any transaction, in addition to
those contemplated by this Agreement or any other Loan Document, with the
Borrower or any of its Affiliates in which the Borrower or such Affiliate is
not restricted hereby from engaging with any other Person.

     SECTION 10.13. Forum Selection and Consent to Jurisdiction. ANY LITIGATION
BASED HEREON, OR ARISING OUT OF, UNDER, OR IN CONNECTION WITH, THIS AGREEMENT
OR ANY OTHER LOAN DOCUMENT, OR ANY COURSE OF CONDUCT, COURSE OF DEALING,
STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF THE AGENTS, THE LENDERS,
THE ISSUERS OR THE BORROWER RELATING THERETO SHALL BE BROUGHT AND MAINTAINED
EXCLUSIVELY (TO THE EXTENT PERMITTED UNDER APPLICABLE LAW) IN THE COURTS OF THE
STATE OF NEW YORK, NEW YORK COUNTY, OR IN THE UNITED STATES DISTRICT COURT FOR
THE SOUTHERN DISTRICT OF NEW YORK; PROVIDED, HOWEVER, THAT ANY SUIT SEEKING
ENFORCEMENT AGAINST ANY COLLATERAL OR OTHER PROPERTY MAY BE BROUGHT, AT THE
ADMINISTRATIVE AGENT'S OPTION, IN THE COURTS OF ANY JURISDICTION WHERE SUCH
COLLATERAL OR OTHER PROPERTY MAY BE FOUND. THE BORROWER HEREBY EXPRESSLY AND
IRREVOCABLY SUBMITS TO THE JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK,
NEW YORK COUNTY, AND OF THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN
DISTRICT OF NEW YORK FOR THE PURPOSE OF ANY SUCH LITIGATION AS SET FORTH ABOVE
AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY IN
CONNECTION WITH SUCH LITIGATION. THE BORROWER IRREVOCABLY CONSENTS TO THE
SERVICE OF PROCESS BY REGISTERED MAIL, POSTAGE PREPAID, OR BY PERSONAL SERVICE
WITHIN OR WITHOUT THE STATE OF NEW YORK. THE BORROWER HEREBY EXPRESSLY AND
IRREVOCABLY WAIVES, TO THE




                                     -117-

<PAGE>


FULLEST EXTENT PERMITTED BY LAW, ANY OBJECTION WHICH IT MAY HAVE OR HEREAFTER
MAY HAVE TO THE LAYING OF VENUE OF ANY SUCH LITIGATION BROUGHT IN ANY SUCH
COURT REFERRED TO ABOVE AND ANY CLAIM THAT ANY SUCH LITIGATION HAS BEEN BROUGHT
IN AN INCONVENIENT FORUM. TO THE EXTENT THAT THE BORROWER HAS OR HEREAFTER MAY
ACQUIRE ANY IMMUNITY FROM JURISDICTION OF ANY COURT OF FROM ANY LEGAL PROCESS
(WHETHER THROUGH SERVICE OR NOTICE, ATTACHMENT PRIOR TO JUDGMENT, ATTACHMENT IN
AID OF EXECUTION OR OTHERWISE) WITH RESPECT TO ITSELF OR ITS PROPERTY, THE
BORROWER HEREBY IRREVOCABLY WAIVES (TO THE EXTENT PERMITTED UNDER APPLICABLE
LAW) SUCH IMMUNITY IN RESPECT OF ITS OBLIGATIONS UNDER THIS AGREEMENT AND THE
OTHER LOAN DOCUMENTS.

     SECTION 10.14. Waiver of Jury Trial. THE AGENTS, THE ISSUERS, THE LENDERS
AND THE BORROWER HEREBY KNOWINGLY, VOLUNTARILY AND INTENTIONALLY WAIVE ANY
RIGHTS THEY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED
HEREON, OR ARISING OUT OF, UNDER OR IN CONNECTION WITH, THIS AGREEMENT OR ANY
OTHER LOAN DOCUMENT, OR ANY COURSE OF CONDUCT, COURSE OF DEALING, STATEMENTS
(WHETHER ORAL OR WRITTEN) OR ACTIONS OF THE AGENTS, THE ISSUERS, THE LENDERS OR
THE BORROWER RELATING THERETO. THE BORROWER ACKNOWLEDGES AND AGREES THAT IT HAS
RECEIVED FULL AND SUFFICIENT CONSIDERATION FOR THIS PROVISION (AND EACH OTHER
PROVISION OF EACH OTHER LOAN DOCUMENT TO WHICH IT IS A PARTY) AND THAT THIS
PROVISION IS A MATERIAL INDUCEMENT FOR THE AGENTS AND THE LENDERS ENTERING INTO
THIS AGREEMENT AND EACH SUCH OTHER LOAN DOCUMENT.

     SECTION 10.15. Confidentiality. The Agents, the Issuers, the Lead Arranger
and the Lenders shall hold all non-public information obtained pursuant to or
in connection with this Agreement or obtained by them based on a review of the
books and records of the Borrower or any of its Subsidiaries in accordance with
their customary procedures for handling confidential information of this
nature, but may make disclosure to any of their examiners, Affiliates, Related
Funds, investment advisors or Affiliates thereof, outside auditors, counsel and
other professional advisors in connection with this Agreement or as reasonably
required by any potential bona fide transferee, participant or assignee, or to
any direct or indirect contractual counterparties in swap agreements or such
contractual counterparties' professional advisors, or in connection with the
exercise of remedies under a Loan Document, or as requested by any governmental
or regulatory agency, any rating agency or the National Association of
Insurance Commissioners, or representative of any thereof or pursuant to legal
process; provided, however, that





                                     -118-

<PAGE>


          (a) unless specifically prohibited by applicable law or court order,
     each Agent, each Issuer, the Lead Arranger and each Lender shall promptly
     notify the Borrower of any request by any governmental agency or
     representative thereof (other than any such request in connection with an
     examination of the financial condition of such Agent, such Issuer, the
     Lead Arranger and such Lender by such governmental agency) for disclosure
     of any such non-public information prior to disclosure of such
     information;

          (b) prior to any such disclosure pursuant to this Section 10.15, each
     Agent, each Issuer, the Lead Arranger and each Lender shall require any
     such bona fide transferee, participant and assignee receiving a disclosure
     of non-public information to agree in writing

               (i) to be bound by this Section 10.15; and

               (ii) to require such Person to require any other Person to whom
          such Person discloses such non-public information to be similarly
          bound by this Section 10.15; and

          (c) except as may be required by an order of a court of competent
     jurisdiction and to the extent set forth therein, no Lender shall be
     obligated or required to return any materials furnished by the Borrower or
     any Subsidiary.





                                     -119-

<PAGE>


     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their respective officers thereunto duly authorized as of the day
and year first above written.

                                         CHARLES RIVER LABORATORIES, INC.


                                         By:________________________________
                                               Name:
                                               Title:

                                         251 Ballardvale Street
                                         Wilmington, MA 01877-1096
                                         Attention:   Dennis R. Shaughnessy
                                         Telecopier:  (978) 694-9504







                                     -120-

<PAGE>


                                          DLJ CAPITAL FUNDING, INC.,
                                          as Syndication Agent and as a Lender



                                          By:________________________________
                                                Name:
                                                Title:

                                          277 Park Avenue
                                          New York, NY 10172
                                          Attention:  James Paradise
                                          Telecopier: (212) 892-7542


                                          Commitment Percentages:
                                          -----------------------
                                          Percentage of Revolving Loans:

                                          Percentage of Term-A Loans:

                                          Percentage of Term-B Loans:





                                     -121-

<PAGE>


                                         UNION BANK OF CALIFORNIA, N.A.,
                                         as Administrative Agent and as a Lender



                                         By:________________________________
                                            Name:
                                            Title:

                                         445 South Figueroa Street
                                         16th Floor
                                         Los Angeles, CA 90071
                                         Attention:  Ronald Launsbach
                                         Telecopier: (213) 629-5328


                                         Commitment Percentages:
                                         ----------------------

                                         Percentage of Revolving Loans:

                                         Percentage of Term-A Loans:

                                         Percentage of Term-B Loans:






                                     -122-

<PAGE>


                                         NATIONAL CITY BANK,
                                         as Documentation Agent and as a Lender



                                         By:________________________________
                                            Name:
                                            Title:

                                         1900 East Ninth Street
                                         Mail Locator 2077
                                         Cleveland, OH 44114
                                         Attention:  Joseph Robison
                                         Telecopier: (216) 222-0003


                                         Commitment Percentages:
                                         ----------------------

                                         Percentage of Revolving Loans:

                                         Percentage of Term-A Loans:

                                         Percentage of Term-B Loans:




                                     -123-

<PAGE>


                                                                     SCHEDULE I

                              DISCLOSURE SCHEDULE


ITEM 6.7  Litigation.

     Description of Proceeding                            Action or Claim Sought
     -------------------------                            ----------------------

ITEM 6.8 Existing Subsidiaries.


ITEM 6.11  Employee Benefit Plans.


ITEM 6.12 Environmental Matters.


ITEM 7.1.11 Intellectual Property.


ITEM 7.1.12 Mortgaged Properties.


ITEM 7.2.2(a) Ongoing Indebtedness.


ITEM 7.2.2 (b) Ongoing Liens.


ITEM 7.2.5(a) Ongoing Investments.






<PAGE>


                                                                     SCHEDULE II

                   Percentages and Administrative Information


<TABLE>

                      Revolving        Term-A         Term-B           Address for Notices
                         Loan           Loan           Loan            (other than Notices
          Lender      Commitment     Commitment     Commitment     relating to LIBO Rate Loans)         LIBOR Office
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                  <C>             <C>                <C>        <C>                              <C>
DLJ Capital          64.2857143%     64.2857143%        100%       277 Park Avenue                  277 Park Avenue
    Funding, Inc.                                                  New York, NY 10172               New York, NY 10172
                                                                   Attention: James Paradise        Attention: James
                                                                   Telephone: (212) 892-7740        Paradise
                                                                   Telecopier: (212) 892-7542       Telephone: (212) 892-7740
                                                                                                     Telecopier: (212) 892-7542
Union Bank of        35.7142857%     35.7142857%         0%        445 South Figueroa St.           445 South Figueroa St.
    California, N.A.                                               Mail Code: 916-075               Mail Code: 916-075
                                                                   Los Angeles, CA 90071            Los Angeles, CA 90071
                                                                   Attention: Amelita Akim          Attention: Amelita Akim
                                                                   Telephone: (213) 236-5276        Telephone: (213) 236-5276
                                                                   Telecopier: (213) 236-7544
                                                                                                    Telecopier: (213) 236-7544
</TABLE>





                                     III-2


                                                       EXHIBIT 10.5

================================================================================





                       CHARLES RIVER LABORATORIES, INC.
                                      and
                   CHARLES RIVER LABORATORIES HOLDINGS, INC.

                                  as Issuers

                   ----------------------------------------

                                 $150,000,000
                          150,000 Units Consisting of
                13 1/2% Senior Subordinated Notes due 2009 and
              Warrants to purchase 591,366 shares of Common Stock

                   ----------------------------------------
                              -------------------

                              PURCHASE AGREEMENT

                        DATED AS OF SEPTEMBER 23, 1999

                              -------------------

                         DONALDSON, LUFKIN & JENRETTE
                            SECURITIES CORPORATION







================================================================================









<PAGE>






                                 $150,000,000

                          150,000 Units Consisting of
                13 1/2% Senior Subordinated Notes due 2009 and
              Warrants to purchase 591,366 shares of Common Stock

                              PURCHASE AGREEMENT



                                                             September 23, 1999


DONALDSON, LUFKIN & JENRETTE
  SECURITIES CORPORATION
277 Park Avenue
New York, New York 10172

Ladies and Gentlemen:

         Charles River Laboratories, Inc., a Delaware corporation (the
"Company"), and Charles River Laboratories Holdings, Inc., a Delaware
corporation ("Holdings" and, together with the Company, the "Issuers"),
propose to issue and sell to Donaldson, Lufkin & Jenrette Securities
Corporation (the "Initial Purchaser") 150,000 units (the "Units"), each
consisting of $1,000 in aggregate principal amount of the Company's 13 1/2%
Series A Senior Subordinated Notes due 2009 (the "Series A Notes"), together
with the Subsidiary Guarantees described below and one warrant (the
"Warrants") to purchase 591,366 shares of common stock of Holdings, par value
$0.01 per share (the "Common Stock"), subject to the terms and conditions set
forth herein. The Series A Notes are to be issued pursuant to the provisions
of an indenture (the "Indenture"), to be dated as of the Closing Date (as
defined below), among the Company, the Guarantors (as defined below) and State
Street Bank and Trust Company, as trustee (the "Trustee"). The Series A Notes
and the Series B Notes (as defined below) issuable in exchange therefor are
collectively referred to herein as the "Notes." As of the Consummation (as
defined), the Notes will be guaranteed (the "Subsidiary Guarantees") by each
of the Guarantors (as defined below). The Warrants will be issued pursuant to
a warrant agreement (the "Warrant Agreement"), to be dated as of the Closing
Date, between Holdings and State Street Bank and Trust Company, as warrant
agent (the "Warrant Agent"). Shares of Common Stock of Holdings issuable upon
exercise of the Warrants are collectively referred to herein as the "Warrant
Shares." The Units, the Notes, the Warrants and the Warrant Shares are
collectively referred to herein as the "Securities." Capitalized terms used
but not defined herein shall have the meanings given to such terms in the
Indenture. This Agreement, the Securities, the Warrant Agreement, the Warrant
Registration Rights Agreement (as defined), the Indenture, the Subsidiary
Guarantees, the Registration Rights Agreement (as defined) and the Credit
Agreement (as defined) are collectively referred to herein as the "Operative
Documents."

         The Series A Notes are being issued and sold in connection with the
recapitalization (the "Recapitalization") of the Company, pursuant to a
Recapitalization Agreement dated as of July 25, 1999 among the Company,

                                      2

<PAGE>

Holdings, certain subsidiaries of Bausch & Lomb Incorporated (the "Rollover
Shareholders"), CRL Acquisition LLC and DLJ Merchant Banking Partners II, L.P.
("DLJMB"). In connection with the Recapitalization, (i) the Company will enter
into a syndicated senior secured loan facility pursuant to a credit agreement
to be dated as of the Closing Date with a group of lenders, including DLJ
Capital Funding, Inc., as syndication agent (the "Credit Agreement") and (ii)
DLJMB and certain of its affiliated funds and entities, the Rollover
Shareholders and certain management of the Company will retain or purchase
capital stock of Holdings, in each case as described in the Offering
Memorandum (as defined below). The Company has also entered into a stock
purchase agreement to acquire SBI Holdings, Inc., and its wholly-owned
subsidiaries, Sierra Biomedical, Inc. and Sierra Biomedical San Diego, Inc.
(collectively, the "Sierra Entities"), which will be consummated on the
Closing Date (the "Sierra Acquisition"). Upon the consummation of the Sierra
Acquisition (the "Consummation"), the Sierra Entities will execute the
Indenture and become guarantors of the Notes issued thereunder (each, a
"Guarantor" and collectively, the "Guarantors").

         1. Offering Memorandum. The Units will be offered and sold to the
Initial Purchaser pursuant to one or more exemptions from the registration
requirements under the Securities Act of 1933, as amended (the "Securities
Act"). The Issuers have prepared a preliminary offering memorandum, dated
September 7, 1999 (the "Preliminary Offering Memorandum"), and a final
offering memorandum, dated September 23, 1999 (the "Offering Memorandum"),
relating to the Units.

         Upon original issuance thereof, and until such time as the same is no
longer required pursuant to the Indenture and the Warrant Agreement, the
Securities (and all securities issued in exchange therefor, in substitution
thereof or upon conversion thereof) shall bear the following legend:

         "THIS [NOTE] [SECURITY] (OR ITS PREDECESSOR) [AND THE WARRANT SHARES
         TO BE ISSUED UPON ITS EXERCISE HAVE] [HAS] NOT BEEN REGISTERED UNDER
         THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
         ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED, SOLD, PLEDGED OR
         OTHERWISE TRANSFERRED WITHIN THE UNITED STATES OR TO, OR FOR THE
         ACCOUNT OR BENEFIT OF, UNITED STATES PERSONS, EXCEPT AS SET FORTH IN
         THE NEXT SENTENCE. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL
         INTEREST HEREIN, THE HOLDER:

         (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (As
         defined in Rule 144A under the Securities Act) (A "QIB"), (B) IT HAS
         ACQUIRED THIS [NOTE] [SECURITY] IN AN OFFSHORE TRANSACTION IN
         COMPLIANCE WITH REGULATION S UNDER THE SECURITIES ACT OR (C) IT IS AN
         INSTITUTIONAL "ACCREDITED INVESTOR" (As defined in Rule 501(A) (1),
         (2), (3) or (7) of Regulation D under the Securities Act (AN "IAI"),

         (2) AGREES THAT IT WILL NOT RESELL OR OTHERWISE TRANSFER THIS [NOTE]
         [SECURITY] EXCEPT (A) TO the COMPANY OR ANY OF ITS SUBSIDIARIES, (B)
         TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QIB PURCHASING
         FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QIB IN A TRANSACTION
         MEETING THE REQUIREMENTS OF RULE 144A, (C) IN AN OFFSHORE TRANSACTION
         MEETING THE REQUIREMENTS OF RULE 903 OR 904 OF REGULATION S OF THE
         SECURITIES ACT, (D) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE
         144 UNDER THE SECURITIES ACT, (E) TO AN IAI THAT, PRIOR TO SUCH
         TRANSFER, FURNISHES THE [TRUSTEE] [WARRANT AGENT] A SIGNED LETTER
         CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE
         TRANSFER OF THIS

                                      3
<PAGE>


         [NOTE] [SECURITY] (the form of which can be obtained from the
         [Trustee] [warrant agent]) AND, IF SUCH TRANSFER IS IN RESPECT OF AN
         AGGREGATE PRINCIPAL AMOUNT OF [NOTES] [SECURITIES] LESS THAN
         $250,000, AN OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY THAT SUCH
         TRANSFER IS IN COMPLIANCE WITH THE SECURITIES ACT, (F) IN ACCORDANCE
         WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
         SECURITIES ACT (AND BASED UPON AN OPINION OF COUNSEL ACCEPTABLE TO
         THE COMPANY) OR (G) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
         AND, IN EACH CASE, IN ACCORDANCE WITH THE APPLICABLE SECURITIES LAWS
         OF ANY STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE
         JURISDICTION, [AND]

         [(3)     AGREES NOT TO ENGAGE IN HEDGING TRANSACTIONS UNLESS IN
         COMPLIANCE WITH THE SECURITIES ACT AND]

         (3) [4] AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS
         [NOTE] [SECURITY] OR AN INTEREST HEREIN IS TRANSFERRED A NOTICE
         SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

         AS USED HEREIN, THE TERMS "OFFSHORE TRANSACTION" AND "UNITED STATES"
         HAVE THE MEANINGS GIVEN TO THEM BY RULE 902 OF REGULATION S UNDER THE
         SECURITIES ACT. THE [INDENTURE] [WARRANT AGREEMENT] CONTAINS A
         PROVISION REQUIRING THE [TRUSTEE] [WARRANT AGENT] TO REFUSE TO
         REGISTER ANY TRANSFER OF THIS [NOTE] [SECURITY] IN VIOLATION OF THE
         FOREGOING."

         2. Agreements to Sell and Purchase. On the basis of the
representations, warranties and covenants contained in this Agreement, and
subject to the terms and conditions contained herein, the Issuers agree to
issue and sell to the Initial Purchaser, and the Initial Purchaser agrees to
purchase from the Issuers, all of the Units initially at a purchase price
equal to $970.00 per Unit.

         3. Terms of Offering. The Initial Purchaser has advised the Issuer
that the Initial Purchaser will make offers (the "Exempt Resales") of the
Units purchased hereunder on the terms set forth in the Offering Memorandum,
as amended or supplemented, solely to (i) persons whom the Initial Purchaser
reasonably believes to be "qualified institutional buyers" as defined in Rule
144A under the Securities Act ("QIBs"), and (ii) persons permitted to purchase
the Series A Notes in offshore transactions in reliance upon Regulation S
under the Securities Act (each, a "Regulation S Purchaser") (such persons
specified in clauses (i) and (ii) being referred to herein as the "Eligible
Purchasers"). The Initial Purchaser will offer the Units to Eligible
Purchasers initially at a price equal to $970.00 per Unit. Such price may be
changed at any time without notice.

         Holders (including subsequent transferees) of the Series A Notes will
have the registration rights set forth in the registration rights agreement
(the "Registration Rights Agreement"), to be dated the Closing Date, in
substantially the form of Exhibit A hereto, for so long as such Series A Notes
constitute "Transfer Restricted Securities" (as defined in the Registration
Rights Agreement). Pursuant to the Registration Rights Agreement, the Company
and the Guarantors will agree to file with the Securities and Exchange
Commission (the "Commission") under the circumstances set forth therein, (i) a
registration statement under the Securities Act (the "Exchange Offer
Registration Statement") relating to the Company's 13 1/2% Series B Senior
Subordinated Notes due 2009 (the "Series B Notes"), to be offered in exchange
for the Series A Notes (such offer to exchange being referred to as the
"Exchange Offer") and the Subsidiary Guarantees


                                      4
<PAGE>

thereof (the "Series B Guarantees") and (ii) a shelf registration statement
pursuant to Rule 415 under the Securities Act (the "Shelf Registration
Statement" and, together with the Exchange Offer Registration Statement, the
"Registration Statements") relating to the resale by certain holders of the
Series A Notes and to use their reasonable best efforts to cause such
Registration Statements to be declared and remain effective and usable for the
periods specified in the Registration Rights Agreement and to consummate the
Exchange Offer.

         Holders (including subsequent transferees) of the Warrants and the
Warrant Shares will have the rights set forth in the Warrant Agreement and the
warrant registration rights agreement (the "Warrant Registration Rights
Agreement"), to be dated the Closing Date. Pursuant to the Warrant
Registration Rights Agreement, Holdings will agree to grant to the holders of
the Warrant Shares the right to require Holdings to file a shelf registration
statement (the "Warrant Registration Statement") covering resales of the
Warrants and Warrant Shares and the exercise of the Warrants purchased
pursuant to such Warrant Registration Statement and to use its reasonable best
efforts to make such Warrant Registration Statement effective.

         4.    Delivery and Payment.

         (a) Delivery of, and payment of the Purchase Price for, the Units
shall be made at the offices of Davis Polk & Wardwell or such other location
as may be mutually acceptable. Such delivery and payment shall be made at 9:00
a.m. New York City time, on September 29, 1999, or at such other time on the
same date or such other date as shall be agreed upon by the Initial Purchaser
and the Issuers in writing. The time and date of such delivery and the payment
for the Units are herein called the "Closing Date."

         (b) One or more of the Units in definitive global form, registered in
the name of Cede & Co., as nominee of The Depository Trust Company ("DTC"),
having an aggregate principal amount corresponding to the aggregate principal
amount of the Units sold pursuant to Exempt Resales (collectively, the "Global
Unit"), shall be delivered by the Issuers to the Initial Purchaser (or as the
Initial Purchaser directs) in each case with any transfer taxes thereon duly
paid by the Issuers against payment by the Initial Purchaser of the Purchase
Price thereof by wire transfer in immediately available funds to the order of
the Issuers. The Global Units shall be made available to the Initial Purchaser
for inspection not later than 9:30 a.m., New York City time, on the business
day immediately preceding the Closing Date.

         5. Agreements of the Issuers and the Guarantors. As of the date
hereof, the Issuers, and as of the Consummation, the Guarantors, hereby agree
with the Initial Purchaser as follows:

(a) To advise the Initial Purchaser promptly and, if requested by the Initial
Purchaser, confirm such advice in writing, (i) of the issuance by any state
securities commission of any stop order suspending the qualification or
exemption from qualification of any Securities for offering or sale in any
jurisdiction designated by the Initial Purchaser pursuant to Section 5(e)
hereof, or the initiation of any proceeding by any state securities commission
or any other federal or state regulatory authority for such purpose, and (ii)
of the happening of any event during the period referred to in Section 5(c)
below that makes any statement of a material fact made in the Preliminary
Offering Memorandum or the Offering Memorandum untrue or that requires any
additions to or changes in the Preliminary Offering Memorandum or the Offering
Memorandum in order to make the statements therein not misleading. The Issuers
and the Guarantors shall use their reasonable best efforts to prevent the
issuance of any stop order or order suspending the qualification or exemption
of any of the Securities under any state securities or Blue Sky laws, and, if
at any time any state securities commission or other federal or state
regulatory authority shall issue an order suspending the qualification or
exemption of any Securities under any state securities or Blue Sky laws, the
Issuers and the Guarantors shall use their reasonable best efforts to obtain
the withdrawal or lifting of such


                                      5
<PAGE>


order at the earliest possible time; provided, however, that the Issuers and
the Guarantors shall not be required in connection therewith to qualify as a
foreign entity in any jurisdiction in which it is not now so qualified or to
take any action that would subject it to general consent to service of process
or taxation, other than as to matters and transactions relating to the
Preliminary Offering Memorandum, the Offering Memorandum or Exempt Resales, in
any jurisdiction in which it is not now so subject.

         (b) To furnish the Initial Purchaser and those persons identified by
the Initial Purchaser to the Issuers as many copies of the Preliminary
Offering Memorandum and the Offering Memorandum, and any amendments or
supplements thereto, as the Initial Purchaser may reasonably request for the
time period specified in Section 5(c). Subject to the Initial Purchaser's
compliance with its representations and warranties and agreements set forth in
Section 7 hereof, the Issuers and the Guarantors consent to the use of the
Preliminary Offering Memorandum and the Offering Memorandum, and any
amendments and supplements thereto required pursuant hereto, by the Initial
Purchaser in connection with Exempt Resales.

         (c) During such period as, in the opinion of counsel for the Initial
Purchaser, an Offering Memorandum is required by law to be delivered in
connection with Exempt Resales by the Initial Purchaser and in connection with
market-making activities of the Initial Purchaser for so long as any Units are
outstanding, (i) not to make any amendment or supplement to the Offering
Memorandum of which the Initial Purchaser shall not previously have been
advised or to which the Initial Purchaser shall reasonably object after being
so advised and (ii) to prepare promptly, upon the Initial Purchaser's
reasonable request, any amendment or supplement to the Offering Memorandum
which may be necessary or advisable in connection with such Exempt Resales or
such market-making activities.

         (d) If, during the period referred to in Section 5(c) above, any
event shall occur or condition shall exist as a result of which, in the
opinion of counsel to the Initial Purchaser, it becomes necessary to amend or
supplement the Offering Memorandum in order to make the statements therein, in
the light of the circumstances when such Offering Memorandum is delivered to
an Eligible Purchaser, not misleading, or if, in the opinion of counsel to the
Initial Purchaser, it is necessary to amend or supplement the Offering
Memorandum to comply with any applicable law, forthwith to prepare an
appropriate amendment or supplement to such Offering Memorandum so that the
statements therein, as so amended or supplemented, will not, in the light of
the circumstances when it is so delivered, be misleading, or so that such
Offering Memorandum will comply with applicable law, and to furnish to the
Initial Purchaser and such other persons as the Initial Purchaser may
designate such number of copies thereof as the Initial Purchaser may
reasonably request.

         (e) Prior to the sale of all Units pursuant to Exempt Resales as
contemplated hereby, to cooperate with the Initial Purchaser and counsel to
the Initial Purchaser in connection with the registration or qualification of
the Units for offer and sale to the Initial Purchaser and pursuant to Exempt
Resales under the securities or Blue Sky laws of such jurisdictions as the
Initial Purchaser may request and to continue such registration or
qualification in effect so long as required for Exempt Resales and to file
such consents to service of process or other documents as may be necessary in
order to effect such registration or qualification; provided, however, that
neither of the Issuers nor any Guarantor shall be required in connection
therewith to qualify as a foreign entity in any jurisdiction in which it is
not now so qualified or to take any action that would subject it to general
consent to service of process or taxation, other than as to matters and
transactions relating to the Preliminary Offering Memorandum, the Offering
Memorandum or Exempt Resales, in any jurisdiction in which it is not now so
subject.

         (f) So long as the Securities are outstanding and the Indenture so
requires, (i) to mail and make generally available as soon as practicable
after the end of each fiscal year to the record holders of the Series


                                      6
<PAGE>


A Notes a financial report of the Issuers and their subsidiaries on a
consolidated basis all such financial reports to include a consolidated
balance sheet, a consolidated statement of operations, a consolidated
statement of cash flows and a consolidated statement of shareholders' equity
as of the end of and for such fiscal year, together with comparable
information as of the end of and for the preceding year, certified by the
Issuers' independent public accountants and (ii) to mail and make generally
available as soon as practicable after the end of each quarterly period
(except for the last quarterly period of each fiscal year) to such holders, a
consolidated balance sheet, a consolidated statement of operations and a
consolidated statement of cash flows as of the end of and for such period, and
for the period from the beginning of such year to the close of such quarterly
period, together with comparable information for the corresponding periods of
the preceding year.

         (g) So long as the Securities are outstanding, to furnish to the
Initial Purchaser as soon as available copies of all reports or other
communications furnished by the Issuers and the Guarantors to their security
holders or furnished to or filed with the Commission or any national
securities exchange on which any class of securities of the Issuers and the
Guarantors is listed and such other publicly available information concerning
the Issuers and/or their subsidiaries as the Initial Purchaser may reasonably
request.

         (h) So long as any of the Securities remain outstanding and during
any period in which the Issuers and the Guarantors are not subject to Section
13 or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), to make available to any holder of Securities in connection with any
sale thereof and any prospective purchaser of such Securities from such
holder, the information ("Rule 144A Information") required by Rule 144A(d)(4)
under the Securities Act.

         (i) Whether or not the transactions contemplated in this Agreement
are consummated or this Agreement is terminated, to pay or cause to be paid
all expenses incident to the performance of the obligations of the Issuers and
the Guarantors under this Agreement, including: (i) the fees, disbursements
and expenses of counsel to the Issuers and the Guarantors and accountants of
the Issuers and the Guarantors in connection with the sale and delivery of the
Units to the Initial Purchaser and pursuant to Exempt Resales, and all other
fees and expenses in connection with the preparation, printing, filing and
distribution of the Preliminary Offering Memorandum, the Offering Memorandum
and all amendments and supplements to any of the foregoing (including
financial statements), including the mailing and delivering of copies thereof
to the Initial Purchaser and persons designated by them in the quantities
specified herein, (ii) all costs and expenses related to the transfer and
delivery of the Units to the Initial Purchaser and pursuant to Exempt Resales,
including any transfer or other taxes payable thereon, (iii) all costs of
printing or producing this Agreement, the other Operative Documents and any
other agreements or documents in connection with the offering, purchase, sale
or delivery of the Units, (iv) all expenses in connection with the
registration or qualification of the Units and the Subsidiary Guarantees for
offer and sale under the securities or Blue Sky laws of the several states and
all costs of printing or producing any preliminary and supplemental Blue Sky
memoranda in connection therewith (including the filing fees and fees and
disbursements of counsel for the Initial Purchaser in connection with such
registration or qualification and memoranda relating thereto), (v) the cost of
printing certificates representing the Units and the Subsidiary Guarantees,
(vi) all expenses and listing fees in connection with the application for
quotation of the Units in the National Association of Securities Dealers, Inc.
("NASD") Automated Quotation System - PORTAL ("PORTAL"), (vii) the fees and
expenses of the Trustee and the Trustee's counsel in connection with the
Indenture, the Notes and the Subsidiary Guarantees, (viii) the fees and
expenses of the Warrant Agent and the Warrant Agent's counsel in connection
with the Warrant Agreement, (ix) the costs and charges of any transfer agent,
registrar and/or depositary (including the DTC), (x) any fees charged by
rating agencies for the rating of the Notes, (xi) all costs and expenses of
the Exchange Offer and any Registration Statement, as set forth in the


                                      7
<PAGE>


Registration Rights Agreement, (xii) all costs and expenses of the Warrant
Registration Statement, as set forth in the Warrant Registration Rights
Agreement, and (xiii) all other costs and expenses incident to the performance
of the obligations of the Issuers and the Guarantors hereunder for which
provision is not otherwise made in this Section.

         The Sierra Entities shall not be responsible for any fees and
expenses described in this paragraph unless and until the Sierra Acquisition
is Consummated.

         (j) To use its reasonable best efforts to effect the inclusion of the
Securities in PORTAL and to maintain the listing of the Securities on PORTAL
for so long as the Securities are outstanding.

         (k) To obtain the approval of DTC for "book-entry" transfer of the
Securities, and to comply with all agreements set forth in the representation
letters of the Issuers and the Guarantors to DTC relating to the approval of
the Securities by DTC for "book-entry" transfer.

         (l) During the period beginning on the date hereof and continuing to
and including the Closing Date, not to offer, sell, contract to sell or
otherwise transfer or dispose of any debt securities of the Issuers or any
Guarantor or any warrants, rights or options to purchase or otherwise acquire
debt securities of the Issuers or any Guarantor substantially similar to the
Securities and the Subsidiary Guarantees (other than (i) the Securities and
the Subsidiary Guarantees or (ii) commercial paper issued in the ordinary
course of business), without the prior written consent of the Initial
Purchaser.

         (m) Not to sell, offer for sale or solicit offers to buy or otherwise
negotiate in respect of any security (as defined in the Securities Act) that
would be integrated with the sale of the Units to the Initial Purchaser or
pursuant to Exempt Resales in a manner that would require the registration of
any such sale of the Units under the Securities Act.

         (n) Not to voluntarily claim, and to actively resist any attempts to
claim, the benefit of any usury laws against the holders of any Securities.

         (o) To cause the Exchange Offer to be made in the appropriate form to
permit Series B Notes and guarantees thereof by the Guarantors registered
pursuant to the Securities Act to be offered in exchange for the Series A
Notes, subject to the limitations contemplated by the Registration Rights
Agreement, and to comply with all applicable federal and state securities laws
in connection with the Exchange Offer.
         (p) To cause the Warrant Registration Statement to be made on the
appropriate form and to comply with all applicable federal and state
securities laws in connection therewith.

         (q) To comply with all of its agreements set forth in the
Registration Rights Agreement.

         (r) To comply with all of its agreements set forth in the Warrant
Agreement.

         (s) To use its reasonable best efforts to do and perform all things
required or necessary to be done and performed under this Agreement by it
prior to the Closing Date and to satisfy all conditions precedent to the
delivery of the Units and the Subsidiary Guarantees.

         (t) For so long as any of the Securities and the Subsidiary
Guarantees are outstanding and if, in the reasonable judgment of the Initial
Purchaser or its counsel, the Initial Purchaser or any of its affiliates (as
defined in the rules and regulations under the Securities Act) is required to
deliver a prospectus (any such prospectus, a "Market Making Prospectus") in
connection with sales of the Units, to (i) provide the Initial Purchaser and
its affiliates, without charge, as many copies of the Market Making Prospectus
as they may


                                      8
<PAGE>


reasonably request, (ii) periodically amend the Registration
Statement or the Warrant Registration Statement so that the information
contained therein complies with the requirements of Section 10(a) of the
Securities Act, (iii) amend the Registration Statement, the Warrant
Registration Statement or amend or supplement the Market Making Prospectus
when necessary to reflect any material changes in the information provided
therein and promptly file such amendment or supplement with the Commission,
(iv) provide the Initial Purchaser and its affiliates with copies of each
amendment or supplement so filed and such other documents, including opinions
of counsel and "comfort" letters, as they may reasonably request and (v)
indemnify the Initial Purchaser and its affiliates with respect to the Market
Making Prospectus and, if applicable, contribute to any amount paid or payable
by the Initial Purchaser and its affiliates in a manner substantially
identical to that specified in Section 8 hereof (with appropriate
modifications). The Issuers consent to the use, subject to the provisions of
the Securities Act and the state securities or Blue Sky laws of the
jurisdictions in which the Units are offered by the Initial Purchaser, of each
Market Making Prospectus.

         6. Representations, Warranties and Agreements of the Issuers. As of
the date hereof, the Issuers, and as of the Consummation, the Guarantors,
represent and warrant to, and agree with, the Initial Purchaser that:

         (a) The Preliminary Offering Memorandum and the Offering Memorandum
do not, and any supplement or amendment to them will not, contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein, in the light of
the circumstances under which they were made, not misleading, except that the
representations and warranties contained in this paragraph (a) shall not apply
to statements in or omissions from the Preliminary Offering Memorandum or the
Offering Memorandum (or any supplement or amendment thereto) based upon
information relating to the Initial Purchaser furnished to the Issuers in
writing by the Initial Purchaser expressly for use therein. No stop order
preventing the use of the Preliminary Offering Memorandum or the Offering
Memorandum, or any amendment or supplement thereto, or any order asserting
that any of the transactions contemplated by this Agreement are subject to the
registration requirements of the Securities Act, has been issued.

         (b) Each of the Issuers and their subsidiaries has been duly
organized, is validly existing and in good standing under the laws of its
jurisdiction of organization and has the requisite power and authority to
carry on its business as described in the Preliminary Offering Memorandum and
the Offering Memorandum and to own, lease and operate its properties, and each
is duly qualified and is in good standing as a foreign entity authorized to do
business in each jurisdiction in which the nature of its business or its
ownership or leasing of property requires such qualification, except where the
failure to be so qualified would not (i) have a material adverse effect on the
business, prospects, financial condition or results of operations of the
Issuers and their subsidiaries, taken as a whole or (ii) in any manner draw
into question the validity of any of the Operative Documents (the events
referred to in clauses (i) and (ii), each a "Material Adverse Effect").

         (c) All equity interests of the Issuers have been duly authorized and
validly issued and are fully paid, non-assessable and not subject to any
preemptive or similar rights.

         (d) The entities listed on Schedule B hereto are the only
subsidiaries, direct or indirect, of the Issuers. Except as otherwise set
forth in the Offering Memorandum, all of the outstanding equity interests of
each of the Issuers' subsidiaries have been duly authorized and validly issued
and are fully paid and non-assessable, as applicable, and are owned by the
Issuers, directly or indirectly through one or more subsidiaries, free and
clear of any security interest, claim, lien, encumbrance or adverse interest
of any nature (each, a "Lien")


                                      9
<PAGE>


         (e) This Agreement has been duly authorized, executed and delivered
by the Issuers and each of the Guarantors.

         (f) The Indenture has been duly authorized by the Company and each of
the Guarantors, and on the Closing Date, will have been validly executed and
delivered by the Company and each of the Guarantors. When the Indenture has
been duly executed and delivered by the Company and each of the Guarantors,
the Indenture will be a valid and binding agreement of the Company and each of
the Guarantors, enforceable against the Company and each of the Guarantors in
accordance with its terms, except as (i) the enforceability thereof may be
limited by bankruptcy, insolvency or similar laws affecting creditors' rights
generally and (ii) rights of acceleration and the availability of equitable
remedies may be limited by equitable principles of general applicability. On
the Closing Date, the Indenture will conform in all material respects to the
requirements of the Trust Indenture Act of 1939, as amended (the "TIA" or
"Trust Indenture Act"), and the rules and regulations of the Commission
applicable to an indenture which is qualified thereunder.

         (g) Each of the Issuers has duly and validly authorized the issuance
of the Notes and the Warrants as a Unit. On the Closing Date, the Units will
conform as to legal matters to the description thereof contained in the
Offering Memorandum.

         (h) The Series A Notes have been duly authorized and, on the Closing
Date, will have been validly executed and delivered by the Company. When the
Series A Notes have been issued, executed and authenticated in accordance with
the provisions of the Indenture and delivered to and paid for by the Initial
Purchaser in accordance with the terms of this Agreement, the Series A Notes
will be entitled to the benefits of the Indenture and will be valid and
binding obligations of the Company, enforceable against the Company in
accordance with their terms, except as (i) the enforceability thereof may be
limited by bankruptcy, insolvency or similar laws affecting creditors' rights
generally and (ii) rights of acceleration and the availability of equitable
remedies may be limited by equitable principles of general applicability. On
the Closing Date, the Series A Notes will conform as to legal matters to the
description thereof contained in the Offering Memorandum.

         (i) On the Closing Date, the Series B Notes will have been duly
authorized by the Company. When the Series B Notes are issued, executed and
authenticated in accordance with the terms of the Exchange Offer and the
Indenture, the Series B Notes will be entitled to the benefits of the
Indenture and will be the valid and binding obligations of the Company,
enforceable against the Company in accordance with their terms, except as (i)
the enforceability thereof may be limited by bankruptcy, insolvency or similar
laws affecting creditors' rights generally and (ii) rights of acceleration and
the availability of equitable remedies may be limited by equitable principles
of general applicability.

         (j) The Warrants have been duly authorized by Holdings and, on the
Closing Date, will have been validly delivered by Holdings. When the Warrants
are issued, the Warrants will be valid and binding obligations of Holdings,
enforceable against Holdings in accordance with their terms, except as (i) the
enforceability thereof may be limited by bankruptcy, insolvency or similar
laws affecting creditors' rights generally and (ii) the rights of acceleration
and the availability of equitable remedies may be limited by equitable
principles of general applicability. On the Closing Date, the Warrants will
conform as to legal matters to the description thereof in the Offering
Memorandum.

         (k) The Warrant Shares have been duly and validly authorized for
issuance by Holdings, and when issued pursuant to the terms of the Warrants
and the Warrant Agreement will be fully paid and


                                      10
<PAGE>


nonassessable and will not be subject to any preemptive or similar rights. On
the Closing Date, the Warrant Shares will conform as to legal matters to the
description thereof contained in the Offering Memorandum.

         (l) The Subsidiary Guarantee to be endorsed on the Series A Notes by
each Guarantor has been duly authorized by such Guarantor and, on the Closing
Date, will have been duly executed and delivered by each such Guarantor. When
the Series A Notes have been issued, executed and authenticated in accordance
with the Indenture and delivered to and paid for by the Initial Purchaser in
accordance with the terms of this Agreement, the Subsidiary Guarantee of each
Guarantor endorsed thereon will be entitled to the benefits of the Indenture
and will be the valid and binding obligation of such Guarantor, enforceable
against such Guarantor in accordance with its terms, except as (i) the
enforceability thereof may be limited by bankruptcy, insolvency or similar
laws affecting creditors' rights generally and (ii) rights of acceleration and
the availability of equitable remedies may be limited by equitable principles
of general applicability. On the Closing Date, the Subsidiary Guarantees to be
endorsed on the Series A Notes will conform as to legal matters to the
description thereof contained in the Offering Memorandum.

         (m) The Subsidiary Guarantee to be endorsed on the Series B Notes by
each Guarantor has been duly authorized by such Guarantor and, when issued,
will have been duly executed and delivered by each such Guarantor. When the
Series B Notes have been issued, executed and authenticated in accordance with
the terms of the Exchange Offer and the Indenture, the Subsidiary Guarantee of
each Guarantor endorsed thereon will be entitled to the benefits of the
Indenture and will be the valid and binding obligation of such Guarantor,
enforceable against such Guarantor in accordance with its terms, except as (i)
the enforceability thereof may be limited by bankruptcy, insolvency or similar
laws affecting creditor's rights generally and (ii) rights of acceleration and
the availability of equitable remedies may be limited by equitable principles
of general applicability. When the Series B Notes are issued, authenticated,
and delivered, the Subsidiary Guarantees to be endorsed on the Series B Notes
will conform as to legal matters to the description thereof in the Offering
Memorandum.

         (n) The Registration Rights Agreement has been duly authorized by the
Company and each of the Guarantors and, on the Closing Date, will have been
duly executed and delivered by the Company and each of the Guarantors. When
the Registration Rights Agreement has been duly executed and delivered by the
Company and each of the Guarantors, the Registration Rights Agreement will be
a valid and binding agreement of the Company and each of the Guarantors,
enforceable against the Company and each of the Guarantors in accordance with
its terms except as (i) the enforceability thereof may be limited by
bankruptcy, insolvency or similar laws affecting creditors' rights generally,
(ii) rights of acceleration and the availability of equitable remedies may be
limited by equitable principles of general applicability and (iii) rights to
indemnity and contribution thereunder may be limited by applicable law. On the
Closing Date, the Registration Rights Agreement will conform as to legal
matters to the description thereof in the Offering Memorandum.

         (o) The Warrant Agreement has been duly and validly authorized by
Holdings and, when duly executed and delivered by Holdings, will be a valid
and binding agreement of Holdings, enforceable against it in accordance with
its terms, except as (i) the enforceability thereof may be limited by
bankruptcy, insolvency or similar laws affecting creditors' rights generally,
(ii) rights of acceleration and the availability of equitable remedies may be
limited by equitable principles of general applicability and (iii) rights to
indemnity and contribution thereunder may be limited by applicable law. On the
Closing Date, the Warrant Agreement will conform as to legal matters to the
description thereof in the Offering Memorandum.

         (p) The Warrant Registration Rights Agreement has been duly and
validly authorized by Holdings and, when duly executed and delivered by
Holdings, will be a valid and binding agreement of


                                      11
<PAGE>


Holdings, enforceable in accordance with its terms, except as (i) the
enforceability thereof may be limited by bankruptcy, insolvency or similar
laws affecting creditors' rights generally, (ii) rights of acceleration and
the availability of equitable remedies may be limited by equitable principles
of general applicability and (iii) rights to indemnity and contribution
thereunder may be limited by applicable law. On the Closing Date, the Warrant
Registration Rights Agreement will conform as to legal matters to the
description thereof in the Offering Memorandum.

         (q) The indebtedness represented by the Units is being incurred for
proper purposes and in good faith. On the Closing Date (after giving effect to
the application of the proceeds from the issuance of the Units), (a) the fair
value and present fair saleable value of the Issuers' assets exceeds and would
exceed its stated liabilities and identified contingent liabilities, (b) the
Issuers should be able to pay its debts as they become absolute and matured
and (c) the capital the Issuers is not and would not be unreasonably small for
the business in which it is engaged.

         (r) Neither of the Issuers nor any of their subsidiaries is in
violation of its respective organizational documents or in default in the
performance of any obligation, agreement, covenant or condition contained in
any indenture, loan agreement, mortgage, lease or other agreement or
instrument to which the Issuers or any of their subsidiaries is a party or by
which the Issuers or any of their subsidiaries or their respective property is
bound, except for such defaults which, singly or in the aggregate, would not
have a Material Adverse Effect.

         (s) The execution, delivery and performance of this Agreement and the
other Operative Documents by the Issuers and each of the Guarantors (as
applicable), compliance by the Issuers and each of the Guarantors (as
applicable) with all provisions hereof and thereof and the consummation of the
transactions contemplated hereby and thereby will not (i) require any consent,
approval, authorization or other order of, or qualification with, any court or
governmental body or agency (except such as may be required under federal
securities or Blue Sky laws of the various states or have been or will be
obtained prior to the Closing Date), (ii) conflict with or constitute a breach
of any of the terms or provisions of, or a default under, (A) the charter or
by-laws of the Issuers or any of their subsidiaries or (B) any indenture, loan
agreement, mortgage, lease or other agreement or instrument that is material
to the Issuers and their subsidiaries, taken as a whole, to which the Issuers
or any of their subsidiaries is a party or by which the Issuers or any of
their subsidiaries or their respective property is bound, (iii) violate or
conflict with any applicable law or any rule, regulation, judgment, order or
decree of any court or any governmental body or agency having jurisdiction
over the Issuers, any of their subsidiaries or their respective property, (iv)
result in the imposition or creation of (or the obligation to create or
impose) a Lien under, any agreement or instrument to which the Issuers or any
of their subsidiaries is a party or by which the Issuers or any of their
subsidiaries or their respective property is bound (other than the Liens to be
created under the Credit Agreement as set forth in the Offering Memorandum),
or (v) result in the termination, suspension or revocation of any
Authorization (as defined below) of the Issuers or any of their subsidiaries
or result in any other impairment of the rights of the holder of any such
Authorization, except (1) insofar as there is required any consent, approval,
authorization, filing, notification or other action that both (x) is described
in Section 3.4 of the Recapitalization Agreement or listed in Schedule 3.4 of
the Disclosure Schedule (as defined in the Recapitalization Agreement) and (y)
either has been or prior to the Closing Date will be obtained or made or (2)
in the case of clauses (i), (ii)(B), (iv) and (v), as would not, singly or in
the aggregate, have a Material Adverse Effect.

         (t) No action has been taken and no law, statute, rule or regulation
or order has been enacted, adopted or issued by any governmental agency or
body which prevents the execution, delivery and performance of any of this
Agreement, the Indenture, the Units, the Subsidiary Guarantees or any of the


                                      12
<PAGE>


other Operative Documents or the issuance of the Units, or suspends the sale
of the Units in any jurisdiction referred to in Section 5(e) and no
injunction, restraining order or other order or relief of any nature by a
federal or state court or other tribunal of competent jurisdiction has been
issued with respect to the Issuers which would prevent or suspend the issuance
or sale of the Units in any jurisdiction referred to in Section 5(e).

         (u) Except as disclosed in the Offering Memorandum, there are no
legal or governmental proceedings pending or threatened to which the Issuers
or any of their subsidiaries is or could be a party or to which any of their
respective property is or could be subject, which would reasonably be expected
to result, singly or in the aggregate, in a Material Adverse Effect.

         (v) Except as disclosed in the Offering Memorandum, neither of the
Issuers nor any of their subsidiaries has violated any foreign, federal, state
or local law or regulation relating to the protection of human health and
safety, the environment or hazardous or toxic substances or wastes, pollutants
or contaminants ("Environmental Laws"), any provisions of the Employee
Retirement Income Security Act of 1974, as amended ("ERISA"), or any
provisions of the Foreign Corrupt Practices Act or the rules and regulations
promulgated thereunder, except for such violations which, singly or in the
aggregate, would not have a Material Adverse Effect.

         (w) Except as otherwise set forth in the Offering Memorandum, there
are no costs or liabilities associated with Environmental Laws (including,
without limitation, any capital or operating expenditures required for
clean-up, closure of properties or compliance with Environmental Laws or any
Authorization, any related constraints on operating activities and any
potential liabilities to third parties) which would, singly or in the
aggregate, have a Material Adverse Effect.

         (x) Each of the Issuers and their subsidiaries has such permits,
licenses, consents, exemptions, franchises, authorizations and other approvals
(each, an "Authorization") of, and has made all filings with and notices to,
all governmental or regulatory authorities and self-regulatory organizations
and all courts and other tribunals, including without limitation, under any
applicable Environmental Laws, as are necessary to own, lease, license and
operate its respective properties and to conduct its business, except where
the failure to have any such Authorization or to make any such filing or
notice would not, singly or in the aggregate, have a Material Adverse Effect.
Except as disclosed in the Offering Memorandum, each such Authorization is
valid and in full force and effect and each of the Issuers and their
subsidiaries is in compliance with all the terms and conditions thereof and
with the rules and regulations of the authorities and governing bodies having
jurisdiction with respect thereto; and no event has occurred (including,
without limitation, the receipt of any notice from any authority or governing
body) which allows or, after notice or lapse of time or both, would allow,
revocation, suspension or termination of any such Authorization or results or,
after notice or lapse of time or both, would result in any other impairment of
the rights of the holder of any such Authorization; and such Authorizations
contain no restrictions that are burdensome to the Issuers or any of their
subsidiaries; except, in each case, where such failure to be valid and in full
force and effect or to be in compliance, the occurrence of any such event or
the presence of any such restriction would not, singly or in the aggregate,
have a Material Adverse Effect.

         (y) The accountants, PricewaterhouseCoopers LLP, that have certified
the financial statements included in the Preliminary Offering Memorandum and
the Offering Memorandum are independent public accountants with respect to the
Issuers as required by the Securities Act and the Exchange Act.

         (z) The historical financial statements, together with related notes
forming part of the Offering Memorandum (and any amendment or supplement
thereto), present fairly the consolidated financial


                                      13
<PAGE>


position, results of operations and changes in financial position of the
Issuers and their subsidiaries on the basis stated in the Offering Memorandum
at the respective dates or for the respective periods to which they apply;
such statements and related schedules and notes have been prepared in
accordance with generally accepted accounting principles consistently applied
throughout the periods involved, except as disclosed therein; and the other
financial and statistical information and data set forth in the Offering
Memorandum (and any amendment or supplement thereto) are, in all material
respects, accurately presented and prepared on a basis consistent with such
financial statements and the books and records of the Issuers.

         (aa) Each of the Issuers has complied with all provisions of Section
517.075, Florida Statutes (Chapter 92-198, Laws of Florida).

         (bb) The pro forma financial statements included in the Preliminary
Offering Memorandum and the Offering Memorandum have been prepared on a basis
consistent with the historical financial statements of the Issuers and their
subsidiaries and give effect to assumptions used in the preparation thereof on
a reasonable basis and in good faith and present fairly the historical and
proposed transactions contemplated by the Preliminary Offering Memorandum and
the Offering Memorandum; and such pro forma financial statements comply as to
form in all material respects with the requirements applicable to pro forma
financial statements included in registration statements on Form S-1 under the
Securities Act. The other pro forma financial and statistical information and
data included in the Offering Memorandum are, in all material respects,
accurately presented and prepared on a basis consistent with the pro forma
financial statements.

         (cc) The Issuers are not, and after giving effect to the offering and
sale of the Units and the application of the net proceeds thereof as described
in the Offering Memorandum, will not be, an "investment company," as such term
is defined in the Investment Company Act of 1940, as amended.

         (dd) Except as otherwise disclosed in the Offering Memorandum, there
are no contracts, agreements or understandings that will remain in effect
after the issuance of the Securities between the Issuers and any person
granting such person the right to require the Issuers to file a registration
statement under the Securities Act with respect to any securities of the
Issuers or to require the Issuers to include such securities with the
Securities registered pursuant to any Registration Statement or the Warrant
Registration Statement.

         (ee) Neither of the Issuers nor any of their subsidiaries nor any
agent thereof acting on the behalf of them has taken, and none of them will
take, any action that might cause this Agreement or the issuance or sale of
the Units to violate Regulation T (12 C.F.R. Part 220), Regulation U (12
C.F.R. Part 221) or Regulation X (12 C.F.R. Part 224) of the Board of
Governors of the Federal Reserve System.

         (ff) No "nationally recognized statistical rating organization" (as
such term is defined for purposes of Rule 436(g)(2) under the Securities Act)
(i) has imposed (or has informed the Issuers that it is considering imposing)
any condition (financial or otherwise) on any Issuer's retaining any rating
assigned to the Issuers or any securities of any Issuer or (ii) has indicated
to any Issuer that it is considering (A) the downgrading, suspension, or
withdrawal of, or any review for a possible change that does not indicate the
direction of the possible change in, any rating so assigned or (B) any change
in the outlook for any rating of any Issuer or any securities of any Issuer.

         (gg) Since the respective dates as of which information is given in
the Offering Memorandum other than as set forth in the Offering Memorandum
(exclusive of any amendments or supplements thereto subsequent to the date of
this Agreement), (i) there has not occurred any material adverse change or any
development involving a prospective material adverse change in the condition,
financial or otherwise, or the


                                      14
<PAGE>


earnings, business, management or operations of the Issuers and their
subsidiaries, taken as a whole, (ii) there has not been any material adverse
change or any development involving a prospective material adverse change in
the capital stock or in the long-term debt of the Issuers or any of their
subsidiaries and (iii) neither of the Issuers nor any of their subsidiaries
has incurred any material liability or obligation, direct or contingent.

         (hh) Except as set forth in the Offering Memorandum under "SEC
Review," and except with respect to any financial statements of the Guarantors
and Holdings, each of the Preliminary Offering Memorandum and the Offering
Memorandum, as of its date, contains all the information specified in, and
meeting the requirements of, Rule 144A(d)(4) under the Securities Act.

         (ii) When the Securities and the Subsidiary Guarantees are issued and
delivered pursuant to this Agreement, neither the Securities nor the
Subsidiary Guarantees will be of the same class (within the meaning of Rule
144A under the Securities Act) as any security of any Issuer or the Guarantors
that is listed on a national securities exchange registered under Section 6 of
the Exchange Act or that is quoted in a United States automated inter-dealer
quotation system.

         (jj) No form of general solicitation or general advertising (as
defined in Regulation D under the Securities Act) was used by any Issuer or
Guarantor or any of their respective representatives (other than the Initial
Purchaser, as to whom the Issuers and the Guarantors make no representation)
in connection with the offer and sale of the Units contemplated hereby,
including, but not limited to, articles, notices or other communications
published in any newspaper, magazine, or similar medium or broadcast over
television or radio, or any seminar or meeting whose attendees have been
invited by any general solicitation or general advertising. No securities of
the same class as the Units have been issued and sold by any Issuer within the
six-month period immediately prior to the date hereof.

         (kk) Prior to the effectiveness of any Registration Statement, the
Indenture is not required to be qualified under the TIA.

         (ll) Neither of the Issuers, the Guarantors, nor any of their
respective affiliates or any person acting on their behalf (other than the
Initial Purchaser, as to whom the Issuers and the Guarantors make no
representation) has engaged or will engage in any directed selling efforts
within the meaning of Regulation S under the Securities Act ("Regulation S")
with respect to the Units.

         (mm) The Units offered and sold in reliance on Regulation S have been
and will be offered and sold only in offshore transactions assuming the
accuracy of the Initial Purchaser's representations and warranties and
agreements set forth in Section 7 hereof.

         (nn) The sale of the Units pursuant to Regulation S is not part of a
plan or scheme to evade the registration provisions of the Securities Act.

         (oo) No registration under the Securities Act of the Units or the
Subsidiary Guarantees is required for the sale of the Units and the Subsidiary
Guarantees to the Initial Purchaser as contemplated hereby or for the Exempt
Resales assuming the accuracy of the Initial Purchaser's representations and
warranties and agreements set forth in Section 7 hereof.

         (pp) There is no (i) material unfair labor practice complaint,
grievance or arbitration proceeding pending or threatened against the Issuers
before the National Labor Relations Board or any state or local labor
relations board or (ii) strike, labor dispute, slowdown or stoppage pending or
threatened against the


                                      15
<PAGE>


Issuers, except for such actions specified in clause (i) or (ii) above, which,
singly or in the aggregate, would not have a Material Adverse Effect. To the
best of the Issuers' knowledge, no collective bargaining organizing activities
are taking place with respect to the Issuers, which, singly or in the aggregate,
would have a Material Adverse Effect.

         (qq) The Issuers maintain a system of internal accounting controls
sufficient to provide reasonable assurance that (i) transactions are executed
in accordance with management's general or specific authorizations, (ii)
transactions are recorded as necessary to permit preparation of financial
statements in conformity with generally accepted accounting principles and to
maintain asset accountability, (iii) access to assets is permitted only in
accordance with management's general or specific authorization, and (iv) the
recorded accountability for assets is compared with the existing assets at
reasonable intervals and appropriate action is taken with respect to any
differences.

         (rr) Except as otherwise set forth in the Offering Memorandum, the
Issuers and their subsidiaries own or possess, or can acquire on reasonable
terms, all patents, patent rights, licenses, inventions, copyrights, know-how
(including trade secrets and other unpatented and/or unpatentable proprietary
or confidential information, systems or procedures), trademarks, service marks
and trade names ("intellectual property") currently employed by them in
connection with the business now operated by them, except where the failure to
own or possess or otherwise be able to acquire such intellectual property
would not, singly or in the aggregate, have a Material Adverse Effect; and, to
the best of the Issuers' knowledge, neither of the Issuers nor any of their
subsidiaries has received any notice of infringement of or conflict with
asserted rights of others with respect to any of such intellectual property
which, singly or in the aggregate, if the subject of an unfavorable decision,
ruling or finding, would have a Material Adverse Effect.

         (ss) Each certificate signed by any officer of any Issuer and
delivered to the Initial Purchaser or counsel for the Initial Purchaser shall
be deemed to be a representation and warranty by such Issuer to the Initial
Purchaser as to the matters covered thereby.

         (tt) The agreements listed on Exhibit C hereto are all the agreements
that are material to the conduct of the business of the Issuers and their
subsidiaries, taken as a whole.

         The Issuers acknowledge that the Initial Purchaser and, for purposes
of the opinions to be delivered to the Initial Purchaser pursuant to Section 9
hereof, counsel to the Issuers and counsel to the Initial Purchaser will rely
upon the accuracy and truth of the foregoing representations and hereby
consent to such reliance.

         7. Initial Purchaser's Representations and Warranties. The Initial
Purchaser represents and warrants to the Issuers, that:

         (a) The Initial Purchaser is either a QIB or an institutional
"accredited investor" (as such term is defined in rule 501(a)(1), (2), (3) or
(7) under the Securities Act, an "Accredited Institution") in either case,
with such knowledge and experience in financial and business matters as is
necessary in order to evaluate the merits and risks of an investment in the
Units.

         (b) The Initial Purchaser (A) is not acquiring the Units with a view
to any distribution thereof or with any present intention of offering or
selling any of the Units in a transaction that would violate the Securities
Act or the securities laws of any state of the United States or any other
applicable jurisdiction and (B) will be reoffering and reselling the Units
only (x) to QIBs in reliance on the exemption from the


                                      16
<PAGE>


registration requirements of the Securities Act provided by Rule 144A and (y)
in offshore transactions in reliance upon Regulation S under the Securities
Act.

         (c) The Initial Purchaser agrees that no form of general solicitation
or general advertising (within the meaning of Regulation D under the
Securities Act) has been or will be used by the Initial Purchaser or any of
its representatives in connection with the offer and sale of the Securities
pursuant hereto, including, but not limited to, articles, notices or other
communications published in any newspaper, magazine or similar medium or
broadcast over television or radio, or any seminar or meeting whose attendees
have been invited by any general solicitation or general advertising.

         (d) The Initial Purchaser agrees that, in connection with Exempt
Resales, the Initial Purchaser will solicit offers to buy the Units only from,
and will offer to sell the Units only to, Eligible Purchasers. The Initial
Purchaser further agrees that it will offer to sell the Units only to, and
will solicit offers to buy the Units only from (A) Eligible Purchasers that
the Initial Purchaser reasonably believes are QIBs and (B) Regulation S
Purchasers, in each case, that agree that (x) the Securities purchased by them
may be resold, pledged or otherwise transferred within the time period
referred to under Rule 144(k) (taking into account the provisions of Rule
144(d) under the Securities Act, if applicable) under the Securities Act, as
in effect on the date of the transfer of such Units, only (I) to the Issuers
or any of their subsidiaries, (II) to a person whom the seller reasonably
believes is a QIB purchasing for its own account or for the account of a QIB
in a transaction meeting the requirements of Rule 144A under the Securities
Act, (III) in an offshore transaction (as defined in Rule 902 under the
Securities Act) meeting the requirements of Rule 904 of the Securities Act,
(IV) in a transaction meeting the requirements of Rule 144 under the
Securities Act, (V) to an Accredited Institution that, prior to such transfer,
furnishes the Trustee a signed letter containing certain representations and
agreements relating to the registration of transfer of such Unit (the form of
which may be obtained from the Trustee) and, if such transfer is in respect of
an aggregate principal amount of Units less than $250,000, an opinion of
counsel acceptable to the Issuers that such transfer is in compliance with the
Securities Act, (VI) in accordance with another exemption from the
registration requirements of the Securities Act (and based upon an opinion of
counsel acceptable to the Issuers) or (VII) pursuant to an effective
registration statement and, in each case, in accordance with the applicable
securities laws of any State of the United States or any other applicable
jurisdiction and (y) they will deliver to each person to whom such Units or an
interest therein is transferred a notice substantially to the effect of the
foregoing.

         (e) The Initial Purchaser and its affiliates or any person acting on
its or their behalf have not engaged or will not engage in any directed
selling efforts within the meaning of Regulation S with respect to the Units.

         (f) The Units offered and sold by the Initial Purchaser pursuant
hereto in reliance on Regulation S have been and will be offered and sold only
in offshore transactions.

         (g) The sale of the Units offered and sold by the Initial Purchaser
pursuant hereto in reliance on Regulation S is not part of a plan or scheme to
evade the registration provisions of the Securities Act.

         (h) With respect to Units to be sold pursuant to Regulation S of the
Securities Act, the Initial Purchaser agrees that it has not offered or sold
and will not offer or sell such Units in the United States or to, or for the
benefit or account of, a U.S. Person (other than a distributor), in each case,
as defined in Rule 902 under the Securities Act (i) as part of its
distribution at any time and (ii) otherwise until 40 days after the later of
the commencement of the offering of the Units pursuant hereto and the Closing
Date, other than in accordance with Regulation S of the Securities Act or
another exemption from the registration requirements of the Securities Act.


                                      17
<PAGE>


The Initial Purchaser agrees that, during such 40-day restricted period, it
will not cause any advertisement with respect to the Units (including any
"tombstone" advertisement) to be published in any newspaper or periodical or
posted in any public sale and will not issue any circular relating to the
Units, except such advertisements that are permitted by and which include the
statements required by Regulation S.

         The Initial Purchaser acknowledges that the Issuers and, for purposes
of the opinions to be delivered to the Initial Purchaser pursuant to Section 9
hereof, counsel to the Issuers and counsel to the Initial Purchaser will rely
upon the accuracy and truth of the foregoing representations, and the Initial
Purchaser hereby consents to such reliance.

         8. Indemnification. (a) As of the date hereof, the Issuers, and as of
the Consummation, the Guarantors, agree, jointly and severally, to indemnify
and hold harmless the Initial Purchaser, its directors, its officers and each
person, if any, who controls the Initial Purchaser within the meaning of
Section 15 of the Securities Act or Section 20 of the Exchange Act, from and
against any and all losses, claims, damages, liabilities and judgments
(including, without limitation, any legal or other expenses incurred in
connection with investigating or defending any matter, including any action,
that could give rise to any such losses, claims, damages, liabilities or
judgments) caused by any untrue statement or alleged untrue statement of a
material fact contained in the Offering Memorandum (or any amendment or
supplement thereto), the Preliminary Offering Memorandum or any Rule 144A
Information provided by the Issuers or any Guarantor to any holder or
prospective purchaser of Units pursuant to Section 5(h) or caused by any
omission or alleged omission to state therein a material fact required to be
stated therein or necessary to make the statements therein not misleading,
except insofar as such losses, claims, damages, liabilities or judgments are
caused by any such untrue statement or omission or alleged untrue statement or
omission based upon information relating to the Initial Purchaser furnished in
writing to the Issuers by the Initial Purchaser; provided, however, that the
foregoing indemnity agreement with respect to any Preliminary Offering
Memorandum shall not inure to the benefit of the Initial Purchaser if the
Initial Purchaser fails to deliver an Offering Memorandum (as then amended or
supplemented, provided by the Issuers to the Initial Purchaser in the
requisite quantity and on a timely basis to permit proper delivery on or prior
to the Closing Date) to the person asserting any losses, claims, damages and
liabilities and judgments caused by any untrue statement or alleged untrue
statement of a material fact contained in any Preliminary Offering Memorandum,
or caused by any omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein not
misleading, if such material misstatement or omission or alleged material
misstatement or omission was cured in the Offering Memorandum.

         (b) The Initial Purchaser agrees to indemnify and hold harmless the
Issuers and the Guarantors and their respective directors and officers and
each person, if any, who controls (within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) the Issuers or any Guarantor
to the same extent as the foregoing indemnity from the Issuers and the
Guarantors to the Initial Purchaser but only with reference to information
relating to the Initial Purchaser furnished in writing to the Issuers by the
Initial Purchaser expressly for use in the Preliminary Offering Memorandum or
the Offering Memorandum.

         (c) In case any action shall be commenced involving any person in
respect of which indemnity may be sought pursuant to Section 8(a) or 8(b) (the
"Indemnified Party"), the Indemnified Party shall promptly notify the person
against whom such indemnity may be sought (the "Indemnifying Party") in
writing and the Indemnifying Party shall assume the defense of such action,
including the employment of counsel reasonably satisfactory to the Indemnified
Party and the payment of all fees and expenses of such counsel, as incurred
(except that, in the case of any action in respect of which indemnity may be
sought pursuant to both Sections 8(a) and 8(b), the Initial Purchaser shall
not be required to assume the defense of such action pursuant to this Section
8(c), but may employ separate counsel and participate in the defense


                                      18
<PAGE>


thereof, but the fees and expenses of such counsel, except as provided below,
shall be at the expense of the Initial Purchaser). Any Indemnified Party shall
have the right to employ separate counsel in any such action and participate
in the defense thereof, but the fees and expenses of such counsel shall be at
the expense of the Indemnified Party unless (i) the employment of such counsel
shall have been specifically authorized in writing by the Indemnifying Party,
(ii) the Indemnifying Party shall have failed to assume the defense of such
action or employ counsel reasonably satisfactory to the Indemnified Party or
(iii) the named parties to any such action (including any impleaded parties)
include both the Indemnified Party and the Indemnifying Party, and the
Indemnified Party shall have been advised by such counsel that there may be
one or more legal defenses available to it which are different from or
additional to those available to the Indemnifying Party (in which case the
Indemnifying Party shall not have the right to assume the defense of such
action on behalf of the Indemnified Party). In any such case, the Indemnifying
Party shall not, in connection with any one action or separate but
substantially similar or related actions in the same jurisdiction arising out
of the same general allegations or circumstances, be liable for the fees and
expenses of more than one separate firm of attorneys (in addition to any local
counsel) for all Indemnified Parties and all such fees and expenses shall be
reimbursed as they are incurred. Such firm shall be designated in writing by
Donaldson, Lufkin & Jenrette Securities Corporation, in the case of the
parties indemnified pursuant to Section 8(a), and by the Issuers, in the case
of parties indemnified pursuant to Section 8(b). The Indemnifying Party shall
indemnify and hold harmless the Indemnified Party from and against any and all
losses, claims, damages, liabilities and judgments by reason of any settlement
of any action (i) effected with its written consent or (ii) effected without
its written consent if the settlement is entered into more than twenty
business days after the Indemnifying Party shall have received a request from
the Indemnified Party for reimbursement for the fees and expenses of counsel
(in any case where such fees and expenses are at the expense of the
Indemnifying Party) and, prior to the date of such settlement, the
Indemnifying Party shall have failed to comply with such reimbursement
request. No Indemnifying Party shall, without the prior written consent of the
Indemnified Party, effect any settlement or compromise of, or consent to the
entry of judgment with respect to, any pending or threatened action in respect
of which the Indemnified Party is or could have been a party and indemnity or
contribution may be or could have been sought hereunder by the Indemnified
Party, unless such settlement, compromise or judgment (i) includes an
unconditional release of the Indemnified Party from all liability on claims
that are or could have been the subject matter of such action and (ii) does
not include a statement as to or an admission of fault, culpability or a
failure to act, by or on behalf of the Indemnified Party.

         (d) To the extent the indemnification provided for in this Section 8
is unavailable to an Indemnified Party or insufficient in respect of any
losses, claims, damages, liabilities or judgments referred to therein, then
each Indemnifying Party, in lieu of indemnifying such Indemnified Party, shall
contribute to the amount paid or payable by such Indemnified Party as a result
of such losses, claims, damages, liabilities and judgments (i) in such
proportion as is appropriate to reflect the relative benefits received by the
Issuers and the Guarantors, on the one hand, and the Initial Purchaser, on the
other hand, from the offering of the Units or (ii) if the allocation provided
by clause 8(d)(i) above is not permitted by applicable law, in such proportion
as is appropriate to reflect not only the relative benefits referred to in
clause 8(d)(i) above but also the relative fault of the Issuers and the
Guarantors, on the one hand, and the Initial Purchaser, on the other hand, in
connection with the statements or omissions which resulted in such losses,
claims, damages, liabilities or judgments, as well as any other relevant
equitable considerations. The relative benefits received by the Issuers and
the Guarantors, on the one hand, and the Initial Purchaser, on the other hand,
shall be deemed to be in the same proportion as the total net proceeds from
the offering of the Units (after underwriting discounts and commissions, but
before deducting expenses) received by the Issuers, and the total discounts
and commissions received by the Initial Purchaser bear to the total price to
investors of the Units, in each case, as set forth in the table on the cover
page of the Offering Memorandum. The relative fault of the Issuers and the
Guarantors, on the one hand, and the Initial Purchaser, on the other hand,
shall be


                                      19
<PAGE>


determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to
state a material fact relates to information supplied by the Issuers and the
Guarantors, on the one hand, or the Initial Purchaser, on the other hand, and
the parties' relative intent, knowledge, access to information and opportunity
to correct or prevent such statement or omission.

         The Issuers and the Guarantors, and the Initial Purchaser agree that
it would not be just and equitable if contribution pursuant to this Section
8(d) were determined by pro rata allocation or by any other method of
allocation which does not take account of the equitable considerations
referred to in the immediately preceding paragraph. The amount paid or payable
by an Indemnified Party as a result of the losses, claims, damages,
liabilities or judgments referred to in the immediately preceding paragraph
shall be deemed to include, subject to the limitations set forth above, any
legal or other expenses incurred by such Indemnified Party in connection with
investigating or defending any matter, including any action, that could have
given rise to such losses, claims, damages, liabilities or judgments.
Notwithstanding the provisions of this Section 8, the Initial Purchaser shall
not be required to contribute any amount in excess of the amount by which the
total discounts and commissions received by the Initial Purchaser exceeds the
amount of any damages which the Initial Purchaser has otherwise been required
to pay by reason of such untrue or alleged untrue statement or omission or
alleged omission. No person guilty of fraudulent misrepresentation (within the
meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation.

         (e) The remedies provided for in this Section 8 are not exclusive and
shall not limit any rights or remedies which may otherwise be available to any
Indemnified Party at law or in equity.

         9. Conditions of Initial Purchaser's Obligations. The obligations of
the Initial Purchaser to purchase the Units under this Agreement are subject
to the satisfaction of each of the following conditions:

         (a) All the representations and warranties of the Issuers and the
Guarantors contained in this Agreement shall be true and correct on the
Closing Date with the same force and effect as if made on and as of the
Closing Date.

         (b) On or after the date hereof, (i) there shall not have occurred
any downgrading, suspension or withdrawal of, nor shall any notice have been
given of any potential or intended downgrading, suspension or withdrawal of,
or of any review (or of any potential or intended review) for a possible
change that does not indicate the direction of the possible change in, any
rating of any Issuer or any Guarantor or any securities of any Issuer or any
Guarantor (including, without limitation, the placing of any of the foregoing
ratings on credit watch with negative or developing implications or under
review with an uncertain direction) by any "nationally recognized statistical
rating organization" (as such term is defined for purposes of Rule 436(g)(2)
under the Securities Act), (ii) there shall not have occurred any change, nor
shall any notice have been given of any potential or intended change, in the
outlook for any rating of any Issuer or any Guarantor or any securities of any
Issuer or any Guarantor by any such rating organization and (iii) no such
rating organization shall have given notice that it has assigned (or is
considering assigning) a lower rating to the Units than that on which the
Units were marketed.

         (c) Since the respective dates as of which information is given in
the Offering Memorandum other than as set forth in the Offering Memorandum
(exclusive of any amendments or supplements thereto subsequent to the date of
this Agreement), (i) there shall not have occurred any change or any
development in the condition, financial or otherwise, or the earnings,
business, management or operations of the Issuers and their subsidiaries,
taken as a whole, (ii) there shall not have been any change or any development
involving a prospective change in the capital stock or in the long-term debt
of the Issuers or any of their


                                      20
<PAGE>


subsidiaries and (iii) neither of the Issuers nor any of their subsidiaries
shall have incurred any liability or obligation, direct or contingent, the
effect of which, in any such case described in clause 9(c)(i), 9(c)(ii) or
9(c)(iii), in the judgment of the Initial Purchaser, is material and adverse
and, in the judgment of the Initial Purchaser, makes it impracticable to
market the Units on the terms and in the manner contemplated in the Offering
Memorandum.

         (d) The Initial Purchaser shall have received on the Closing Date a
certificate dated the Closing Date and after the Consummation, signed by the
Chief Executive Officer, Chairman of the Board, President or a Vice President
and the chief financial officer, principal accounting officer or equivalent
financial officer responsible for the financial statements, of the Issuers and
the Guarantors, confirming the matters set forth in Sections 9(a), 9(b) and
9(c) and stating that the Issuers and each Guarantor has complied with all the
agreements and satisfied all of the conditions herein contained and required
to be complied with or satisfied on or prior to the Closing Date.

         (e) The Initial Purchaser shall have received on the Closing Date a
certificate dated the Closing Date and after the Consummation, signed by the
Chief Executive Officer, Chairman of the Board, President or a Vice President
and the chief financial officer, principal accounting officer or equivalent
financial officer responsible for the financial statements, of the Issuers and
the Guarantors, substantially in the form set forth in Exhibit B hereto.

         (f) The Initial Purchaser shall have received on the Closing Date an
opinion (satisfactory to the Initial Purchaser and counsel for the Initial
Purchaser), dated the Closing Date, of Davis Polk & Wardwell, counsel for the
Issuers, to the effect that:

               (i) the execution and delivery of this Agreement, the
         Registration Rights Agreement, the Indenture and the Notes and
         compliance by the Issuers to the extent a party thereto, with the
         provisions thereof will not conflict with, constitute a default under
         or violate (i) any of the terms, conditions or provisions of the
         certificate of incorporation or bylaws of the Issuers, (ii) any of
         the terms, conditions or provisions of any Operative Document, and
         (iii) any New York, Delaware corporate, or federal law or regulation
         (other than federal and state securities or blue sky laws, as to
         which we express no opinion);

               (ii) no consent, approval, waiver, license or authorization or
         other action by or filing with any New York, Delaware corporate, or
         federal governmental authority is required in connection with the
         execution and delivery by the Issuers of this Agreement, the
         Registration Rights Agreement, the Warrant Agreement, the Warrant
         Registration Rights Agreement, the Indenture and the Securities or
         the consummation by the Issuers of their obligations thereunder,
         except for (i) the applicable requirements of federal and state
         securities or blue sky laws, as to which we express no opinion and
         (ii) those already obtained and which are in full force and effect;

               (iii) the Series A Notes have been duly authorized by the
         Company and, when executed and authenticated in accordance with the
         provisions of the Indenture and delivered to and paid for by the
         Initial Purchaser in accordance with the terms of this Agreement,
         will be entitled to the benefits of the Indenture and will be valid
         and binding obligations of the Company, enforceable against the
         Company in accordance with their terms, except as (x) the
         enforceability thereof may be limited by bankruptcy, insolvency,
         fraudulent conveyance or similar laws affecting creditors' rights
         generally, (y) rights of acceleration and the availability of
         equitable remedies may be limited by equitable principles of general
         applicability and (z) to the extent that a waiver of rights under any
         usury or stay law may be unenforceable; we express no opinion,
         however, as to the applicability


                                      21
<PAGE>


         (and, if applicable, the effect) of Section 548 of the United States
         Bankruptcy Code or any comparable provision of state law to the
         questions addressed above or on the conclusions expressed with
         respect thereto;

               (iv) the Warrants have been duly authorized by Holdings and, on
         the Closing Date, when countersigned by the Warrant Agent and issued
         and delivered in accordance with the terms of this Agreement and the
         Warrant Agreement, the Warrants will be the valid and binding
         obligations of Holdings, enforceable against Holdings in accordance
         with their terms, except as (i) the enforceability thereof may be
         limited by bankruptcy, insolvency, fraudulent conveyance or similar
         laws affecting creditors' rights generally and (ii) rights of
         acceleration and the availability of equitable remedies may be
         limited by equitable principles of general applicability;

               (v) the Warrant Shares have been duly and validly authorized
         for issuance by Holdings, and when issued and delivered upon payment
         of the exercise price pursuant to the terms of the Warrants and the
         Warrant Agreement will be fully paid and nonassessable and will not
         be subject to any preemptive or similar statutory rights;

               (vi) the Indenture has been duly authorized, executed and
         delivered by the Company and is a valid and binding agreement of the
         Company, enforceable against the Company in accordance with its
         terms, except as (x) the enforceability thereof may be limited by
         bankruptcy, insolvency, fraudulent conveyance or similar laws
         affecting creditors' rights generally, (y) rights of acceleration and
         the availability of equitable remedies may be limited by equitable
         principles of general applicability and (z) to the extent that a
         waiver of rights under any usury or stay law may be unenforceable; we
         express no opinion, however, as to the applicability (and, if
         applicable, the effect) of Section 548 of the United States
         Bankruptcy Code or any comparable provision of state law to the
         questions addressed above or on the conclusions expressed with
         respect thereto;

               (vii) this Agreement has been duly authorized, executed and
         delivered by the Issuers;

               (viii) the Registration Rights Agreement has been duly
         authorized, executed and delivered by the Company and is a valid and
         binding agreement of the Company, enforceable against the Company in
         accordance with its terms, except as (x) the enforceability thereof
         may be limited by bankruptcy, insolvency, fraudulent conveyance or
         similar laws affecting creditors' rights generally, (y) rights of
         acceleration and the availability of equitable remedies may be
         limited by equitable principles of general applicability and (z) as
         rights to indemnity and contribution thereunder may be limited by
         applicable law;

               (ix) the Series B Notes have been duly authorized by the Company;

               (x) the Warrant Agreement has been duly and validly authorized,
         executed and delivered by Holdings and is a valid and binding
         agreement of Holdings, enforceable against Holdings in accordance
         with its terms, except as (i) the enforceability thereof may be
         limited by bankruptcy, insolvency, fraudulent conveyance or similar
         laws affecting creditors' rights generally and (ii) rights of
         acceleration and the availability of equitable remedies may be
         limited by equitable principles of general applicability;

               (xi) the Warrant Registration Rights Agreement has been duly
         and validly authorized, executed and delivered by Holdings and is a
         valid and binding agreement of Holdings, enforceable against Holdings
         in accordance with its terms, except as (i) the enforceability
         thereof may be limited


                                      22
<PAGE>


         by bankruptcy, insolvency or similar laws affecting creditors' rights
         generally, (ii) rights of acceleration and the availability of
         equitable remedies may be limited by equitable principles of general
         applicability and (iii) as rights to indemnity and contribution
         thereunder may be limited by applicable law;

               (xii) the statements under the captions "Certain Relationships
         and Related Party Transactions--the Recapitalization--Investors
         Agreement," "Description of New Credit Facility," "Description of
         Units," "Description of Notes," "Description of Warrants," and "Plan
         of Distribution" in the Offering Memorandum, insofar as such
         statements constitute a summary of legal matters or documents
         referred to therein, fairly summarize in all material respects the
         legal matters or documents referred to therein;

               (xiii) the Indenture complies as to form in all material
         respects with the requirements of the TIA, and the rules and
         regulations of the Commission applicable to an indenture which is
         qualified thereunder; and

               (xiv) it is not necessary in connection with the offer, sale
         and delivery of the Units to the Initial Purchaser in the manner
         contemplated by this Agreement or in connection with the initial
         placement of the Units by the Initial Purchaser in the manner
         contemplated by the Offering Memorandum pursuant to Exempt Resales to
         qualify the Indenture under the TIA, and no registration under the
         Securities Act of the Units is required for the sale of the Units to
         the Initial Purchaser as contemplated by this Agreement or for the
         initial placement of the Units by the Initial Purchaser in the manner
         contemplated by the Offering Memorandum pursuant to Exempt Resales
         assuming that (i) the Initial Purchaser is a QIB or a Regulation S
         Purchaser, (ii) the accuracy of, and compliance with, the Initial
         Purchaser's representations and agreements contained in Section 7 of
         this Agreement, and (iii) the accuracy of the agreements and
         representations of the Issuers set forth in Sections 5(h) and (m) and
         6(hh), (ii), (jj), (kk), (ll), (mm) and (oo) of this Agreement. Such
         counsel may state that it expresses no opinion as to any other offer
         or resale.

         In addition, such counsel shall state that it has participated in the
preparation of the Offering Memorandum and any amendments or supplements
thereto, if applicable, and that although such counsel has not independently
verified the accuracy, completeness or fairness of the statements contained
therein, no facts have come to such counsel's attention to cause it to believe
that, as of the date of the Offering Memorandum or as of the Closing Date, the
Offering Memorandum, as amended or supplemented, if applicable (except for the
financial statements and other financial or statistical data included therein
or omitted therefrom, as to which such counsel need not express any belief)
contains any untrue statement of a material fact or omits to state a material
fact necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading.

         The opinion of Davis Polk & Wardwell described in this Section 9(f)
shall be rendered to the Initial Purchaser at the request of the Issuers and
shall so state therein.

(g) The Initial Purchaser shall have received on the Closing Date an opinion
(satisfactory to the Initial Purchaser and counsel for the Initial Purchaser),
dated the Closing Date, of Dennis R. Shaughnessy, Esq., general counsel for
the Issuer, to the effect that:

               (i) each of the Issuers is a corporation duly formed, validly
         existing and in good standing under the laws of the State of Delaware
         and has all requisite corporate power and authority to own, lease and
         operate its properties and to carry on its business as described in
         the Offering


                                      23
<PAGE>


         Memorandum. Each of the Issuers is duly qualified to transact
         business and is in good standing as a foreign corporation in each
         jurisdiction where the character of its activities requires such
         qualification, except where the failure of the Issuers to be so
         qualified would not have a Material Adverse Effect;

               (ii) the execution and delivery of this Agreement, the
         Registration Rights Agreement, the Warrant Agreement, the Warrant
         Registration Rights Agreement, the Indenture and the Securities and
         compliance by the Issuers to the extent a party thereto, with the
         provisions thereof will not conflict with, constitute a default under
         or violate (i) any of the terms, conditions or provisions of the
         certificate of incorporation or bylaws of the Issuers, (ii) any of
         the terms, conditions or provisions of any document, agreement or
         other instrument set forth on Exhibit C attached hereto, (iii) any
         Delaware corporate, or federal law or regulation (other than federal
         and state securities or blue sky laws, as to which such counsel
         expresses no opinion), and (iii) any judgment, writ, injunction,
         decree, order or ruling of any court or governmental authority
         binding on the Issuers or any of their subsidiaries, except as
         disclosed in the Offering Memorandum;

               (iii) to such counsel's knowledge, there is no material
         document, agreement or other instrument that will remain in effect
         after the issuance of the Securities to which any Issuer is a party
         (other than the Registration Rights Agreement and the Warrant
         Registration Rights Agreement) granting any person the right to
         require the Issuers to file a registration statement under the
         Securities Act with respect to any securities of the Issuers or to
         require the Issuers to include such securities with the Units
         registered pursuant to any Registration Statement;

               (iv) the Issuers are not and, after giving effect to the
         offering and sale of the Units in accordance with the terms of this
         Agreement and the application of the net proceeds thereof as
         described in the Offering Memorandum under the captions "Use of
         Proceeds," will not be, an "investment company" within the meaning of
         the Investment Company Act of 1940, as amended;

               (v) to such counsel's knowledge, (a) neither of the Issuers nor
         any of their domestic subsidiaries is in violation of its respective
         organizational documents, (b) neither of the Issuers nor any of their
         subsidiaries is in default in the performance of any obligation,
         agreement, covenant or condition contained in any material document,
         agreement or other instrument to which the Issuers or any of their
         subsidiaries is a party or by which any of them or their respective
         property is bound, in each case except where such violation or
         default would not have a Material Adverse Effect; and

               (vi) the statements under the captions "Certain Relationships
         and Related Party Transactions" in the Offering Memorandum, insofar
         as such statements constitute a summary of the legal matters or
         documents referred to therein, fairly present in all material
         respects such legal matters, or documents.

         The opinion of Dennis R. Shaughnessy, Esq. described in this Section
9(g) shall be rendered to the Initial Purchaser at the request of the Issuers
and shall so state therein.

         (h) The Initial Purchaser shall have received, at the Closing Date,
an opinion, dated the Closing Date, of Latham & Watkins, counsel for the
Initial Purchaser, in form and substance satisfactory to the Initial
Purchaser.

         (i) The Initial Purchaser shall have received, at the time this
Agreement is executed and at the Closing Date, letters dated the date hereof
or the Closing Date, as the case may be, in form and substance


                                      24
<PAGE>


satisfactory to the Initial Purchaser from PricewaterhouseCoopers LLP,
independent public accountants, containing the information and statements of
the type ordinarily included in accountants' "comfort letters" with respect to
the financial statements and certain financial information contained in the
Offering Memorandum.

         (j) The Securities shall have been approved by the NASD for trading
and duly listed in PORTAL.

         (k) The Initial Purchaser shall have received a counterpart,
conformed as executed, of the Indenture which shall have been entered into by
the Company, the Guarantors and the Trustee.

         (l) The Company shall have executed the Registration Rights Agreement
and the Initial Purchaser shall have received an original copy thereof, duly
executed by the Company and the Guarantors.

         (m) The Issuers and the Guarantors shall have executed this Agreement
and the Initial Purchaser shall have received an original copy thereof, duly
executed by the Issuers and the Guarantors.

         (n) Holdings shall have executed the Warrant Agreement and the
Warrant Registration Rights Agreement and the Initial Purchaser shall have
received counterparts, conformed as executed thereof.

         (o) Neither of the Issuers nor the Guarantors shall have failed at or
prior to the Closing Date to perform or comply with any of the agreements
herein contained and required to be performed or complied with by the Issuers
or the Guarantors at or prior to the Closing Date.

         10. Effectiveness of Agreement and Termination. This Agreement shall
become effective upon the execution and delivery of this Agreement by the
parties hereto other than the Sierra Entities.

         This Agreement may be terminated at any time on or prior to the
Closing Date by the Initial Purchaser by written notice to the Issuers if any
of the following has occurred: (i) any outbreak or escalation of hostilities
or other national or international calamity or crisis or change in economic
conditions or in the financial markets of the United States or elsewhere that,
in the Initial Purchaser's judgment, is material and adverse and, in the
Initial Purchaser's judgment, makes it impracticable to market the Units on
the terms and in the manner contemplated in the Offering Memorandum, (ii) the
suspension or material limitation of trading in securities or other
instruments on the New York Stock Exchange, the American Stock Exchange, the
Chicago Board of Options Exchange, the Chicago Mercantile Exchange, the
Chicago Board of Trade or the Nasdaq National Market or limitation on prices
for securities or other instruments on any such exchange or the Nasdaq
National Market, (iii) the suspension of trading of any securities of the
Issuers or any Guarantor on any exchange or in the over-the-counter market,
(iv) the enactment, publication, decree or other promulgation of any federal
or state statute, regulation, rule or order of any court or other governmental
authority which, in the Initial Purchaser's opinion, materially and adversely
affects, or will materially and adversely affect, the business, prospects,
financial condition or results of operations of the Issuers and their
subsidiaries, taken as a whole, (v) the declaration of a banking moratorium by
either federal or New York State authorities or (vi) the taking of any action
by any federal, state or local government or agency in respect of its monetary
or fiscal affairs which, in the Initial Purchaser's opinion, has a material
adverse effect on the financial markets in the United States.

         11. Initial Purchaser's Information.

         The Issuers and the Initial Purchaser acknowledge and agree for all
purposes under this Agreement that the statements with respect to the offering
of the Notes set forth in the stabilization language in the first


                                      25
<PAGE>


paragraph of page (i); and the first sentence of the third paragraph, the
fourth sentence of the sixth paragraph and the eighth paragraph under the
caption "Plan of Distribution" in such Offering Memorandum constitute the only
information furnished to the Issuers in writing by the Initial Purchaser
expressly for use in the Offering Memorandum.

         12. Miscellaneous. Notices given pursuant to any provision of this
Agreement shall be addressed as follows: (i) if to the Issuers or any
Guarantor, at 251 Ballardvale Street, Wilmington, Massachusetts 01887,
Telecopier No.: 978-694-9504, and (ii) if to the Initial Purchaser, to
Donaldson, Lufkin & Jenrette Securities Corporation, 277 Park Avenue, New
York, New York 10172, Attention: Syndicate Department, or in any case to such
other address as the person to be notified may have requested in writing.

         The respective indemnities, contribution agreements, representations,
warranties and other statements of the Issuers, the Guarantors and the Initial
Purchaser set forth in or made pursuant to this Agreement shall remain
operative and in full force and effect, and will survive delivery of and
payment for the Units, regardless of (i) any investigation, or statement as to
the results thereof, made by or on behalf of the Initial Purchaser, the
officers or directors of the Initial Purchaser, any person controlling the
Initial Purchaser, the Issuers, any Guarantor, the officers or directors of
the Issuers or any Guarantor, or any person controlling the Issuers or any
Guarantor, (ii) acceptance of the Units and payment for them hereunder and
(iii) termination of this Agreement.

         If for any reason the Units are not delivered by or on behalf of the
Issuers as provided herein (other than as a result of any termination of this
Agreement pursuant to Section 10), the Issuers and the Guarantors, jointly and
severally, agree to reimburse the Initial Purchaser for all out-of-pocket
expenses (including the fees and disbursements of counsel) incurred by them
(provided that the Sierra Entities shall not be responsible for any of the
fees and expenses described in this paragraph unless and until the
Consummation). Notwithstanding any termination of this Agreement, the Issuers
shall be liable for all expenses which they have agreed to pay pursuant to
Section 5(i) hereof. The Issuers and each Guarantor also agree, jointly and
severally, to reimburse the Initial Purchaser and its officers, directors and
each person, if any, who controls such Initial Purchaser within the meaning of
Section 15 of the Securities Act or Section 20 of the Exchange Act for any and
all fees and expenses (including without limitation the fees and expenses of
counsel) incurred by them in connection with enforcing their rights under this
Agreement (including without limitation their rights under Section 8).

         Except as otherwise provided, this Agreement has been and is made
solely for the benefit of and shall be binding upon the Issuers, the
Guarantors, the Initial Purchaser, the Initial Purchaser's directors and
officers, any controlling persons of the Initial Purchaser referred to herein,
the directors and officers of the Issuers and the Guarantors, any controlling
persons of the Issuers or the Guarantors referred to herein and their
respective successors and assigns, all as and to the extent provided in this
Agreement, and no other person shall acquire or have any right under or by
virtue of this Agreement. The term "successors and assigns" shall not include
a purchaser of any of the Units from the Initial Purchaser merely because of
such purchase.

         This Agreement shall be governed and construed in accordance with the
internal laws of the State of New York.

         This Agreement may be signed in various counterparts which together
shall constitute one and the same instrument.



                                      26
<PAGE>


         Please confirm that the foregoing correctly sets forth the agreement
among the Issuers, the Guarantors and the Initial Purchaser.

                                       Very truly yours,

                                       CHARLES RIVER LABORATORIES, INC.


                                       By:_____________________________________
                                          Name:
                                          Title:


                                       CHARLES RIVER LABORATORIES HOLDINGS, INC.


                                       By:_____________________________________
                                          Name:
                                          Title:


DONALDSON, LUFKIN & JENRETTE
   SECURITIES CORPORATION


By:__________________________________
   Name:
   Title:


Accepted as of the consummation of the
Sierra Acquisition by SBI Holdings, Inc.,
Sierra Biomedical, Inc. and Sierra
Biomedical San Diego, Inc., each a
Guarantor, it being understood that the
provisions applicable hereto and binding
on the Guarantors are only effective
immediately upon the consummation of the
Sierra Acquisition:


SBI HOLDINGS, INC.


By:_________________________________
   Name:
   Title:


SIERRA BIOMEDICAL, INC.


By:_________________________________
   Name:
   Title:


SIERRA BIOMEDICAL SAN DIEGO, INC.


By:_________________________________
   Name:
   Title:



<PAGE>



                                  SCHEDULE A

                                 Subsidiaries

                                                             State/Country of
                 Name                                        Incorporation


SBI Holdings, Inc. (simultaneously upon consummation of      Nevada
the Sierra Acquisition)

Sierra Biomedical, Inc. (simultaneously upon consummation    Nevada
of the Sierra Acquisition)

Sierra Biomedical San Diego, Inc. (simultaneously upon       California
consummation of the Sierra Acquisition)

I.F.F.A. Credo                                               France

S.A. Iffa Credo Belgium                                      Belgium

Endosafe Amilabo S.A.                                        France

CRIFFA                                                       Spain

Charles River France, S.A.                                   France

Charles River WIGA (Deutschland) GmbH                        Germany

Elavages de Scientific Des Dombes S.A.                       France

Charles River Italia, S.p.A.                                 Italy

Charles River Japan, Inc.                                    Japan

Charles River U.K. Limited                                   England

Shamrock (Great Britain) Limited                             England

Charles River Endosafe Limited                               England

Charles River Europe GmbH                                    Germany

Charles River Anlab spol.s.r.o.                              Czech Republic

Charles River Consulting GmbH                                Germany

Charles River Sweden AB                                      Sweden

Charles River Hungary                                        Hungary


                                      S-1
<PAGE>


ALPES SA                                                     Mexico

Spafas Jinan Poultry Company, Ltd.                           China

Zhanjiang A&C Biological Ltd.                                China

SPAFAS Australia Pty. Ltd.                                   Australia

Charles River Canada Corporation                             Canada



                                     S-2



<PAGE>



                                  EXHIBIT A

                     Form of Registration Rights Agreement

<PAGE>





                                   EXHIBIT B

                             Company's Certificate

         Charles River Laboratories, Inc., a Delaware corporation (the
"Company") and Charles River Laboratories Holdings, Inc., a Delaware
corporation ("Holdings"), hereby certify through their Chief Executive
Officer, Chairman of the Board, President or a Vice President and the chief
financial officer, principal accounting officer or equivalent financial
officer responsible for the financial statements, pursuant to Section 9(e) of
the Purchase Agreement dated September 23, 1999, between the Company,
Holdings, the Guarantors that are a party thereto and Donaldson, Lufkin &
Jenrette Securities Corporation, as follows:

         1. Attached hereto is a schedule listing the assumptions used by the
Company and Holdings in preparing the Company's and Holdings' calculation of
Adjusted EBITDA, which equals EBITDA plus restructuring charges, dividends
received or receivable from equity investments, Charles River non-cash
compensation, Sierra non-cash compensation, non-recurring transaction expenses
and expected cost savings, as set forth in the Offering Memorandum. Management
of the Company and Holdings believes that such assumptions are reasonable.

         Capitalized terms used herein but not otherwise defined shall have
their respective meanings set forth in the Purchase Agreement.

         In witness whereof, the Company and Holdings, through the
undersigned, have executed this certificate this 29th day of September, 1999.

                       CHARLES RIVER LABORATORIES, INC.


                                       By:_____________________________________
                                          Name:
                                          Title:


                                       By:_____________________________________
                                          Name:
                                          Title:

                                       CHARLES RIVER LABORATORIES HOLDINGS, INC.


                                       By:_____________________________________
                                          Name:
                                          Title:


                                       By:_____________________________________
                                          Name:
                                          Title:




<PAGE>



                                   EXHIBIT C

The following is a list of "Material Contracts," as required under Item
601(10) of Regulation S-K of the Exchange Act:

1.   Credit Agreement, dated September 29, 1999 among Charles River
     Laboratories, Inc. and DLJ Capital Funding, Inc.

2.   Recapitalization Agreement, dated July 25, 1999, by and among Bausch &
     Lomb Incorporated ("Bausch & Lomb"), certain subsidiaries of Bausch &
     Lomb, CRL Acquisition LLC, and DLJ Merchant Banking Partners II, L.P.

3.   Joint Venture Agreement between Ajinomoto Co., Inc. and Charles River
     Breeding Laboratories, Inc. dated June 24, 1981, and ancillary
     agreements, amendments and addendums. June 15, 1987 Amendment Agreement,
     Amending the Joint Venture Agreement. January 17, 1994 Letter Amendment
     of Joint Venture Agreement. August 30, 1996 Addendum to the Joint Venture
     Agreement.

4.   Merck Primate Supply Agreement between Merck & Co., Inc. and Charles River
     Laboratories, Inc. dated September 30, 1994.

5.   License and Technical Assistance Agreement CRL Breeding Labs and Ajinomoto
     Co., Inc. Amendment Agreement, dated March 24, 1978.

6.   Joint Venture Contract relating to setting up of Zhanjiang A&L Biological
     Ltd. between Zhanjiang Scientific and Technical Service Centre and
     Charles River Laboratories, Inc. dated March 8, 1997.

7.   Technology License Contract between Charles River Laboratories
     ("Licensor") and Zhanjiang A&C Biological Ltd. ("Licensee") dated
     September 1, 1997.

8.   Joint venture and stock purchase agreement (unsigned) between SPAFAS,
     Incorporated and Miguel Romero Sanchez, Margarita Berta, Martinez del
     Sobral of Campa, Socorro Romero Sanchez, Luisa Romero Martinez del Sobrae
     and Alejandro Romero Martinez del Sobral and Aves Libres de Patogenos
     Especificies, S.A. dated August 15, 1996.

9.   Award/Contract between National Institute on Drug Abuse and Charles River
     Laboratories dated July 1, 1997.

10.  FCRDC Contract between National Cancer Institute Research Contracts
     Branch Frederick Cancer Research and Development Center (NCI-FCRDC) and
     Charles River Laboratories, Inc. dated September 26, 1994.

11.  Strategic Partnership Agreement between Multicase, Inc. and Charles River
     Laboratories, Inc. dated January 1, 1999.

12.  Ground Lease between HIC Associates (Lessor) and Charles River
     Laboratories, Inc. (Lessee) dated June 5, 1992; Real Estate Lease between
     Charles River Laboratories, Inc. (Landlord) and Charles River Partners
     L.P. (Tenant) dated December 22, 1993; and Assignment and Assumption
     Agreement between Charles River Partners, L.P. (Assignor) and Wilmington
     Partners L.P. (Assignees) dated December 22, 1993.


<PAGE>



13.  Lease between Kenneth J. and Vivianne  Pickren and East Acres Farm, Inc.
     (collectively, Landlord) and Charles River Laboratories, Inc. (Tenant)
     dated November 30, 1994; Notice of Lease between Kenneth J. and Vivianne
     Pickren and East Acres Farm, Inc. (collectively, Landlord) and Charles
     River Laboratories, Inc. (Tenant) filed in the office of the Worchester
     Registry of Deeds on December 16, 1994 in Book 16772, page 34.

14.  Agreement of Lease between Rouse & Associates-Philadelphia (Landlord) and
     Tektagen, Inc. (Tenant) dated May 19, 1987; First Amendment to Lease
     between Rouse & Associates-Philadelphia Limited Partnership (Landlord)
     and Tektagen, Inc. (Tenant) dated November 21, 1989 (changes renewal
     notice requirement); Third Amendment to Lease between PBP Realty
     Partnership (Landlord) and Bionetics Corporation, successor in interest
     to Ketron, Inc. (Tenant) dated April 14, 1994 (increases space); Fourth
     Amendment to Lease between PBP Realty Partnership (Landlord) and
     Tektagen, Inc. (Tenant) dated April 1994 (increases space, extends term
     and includes additional renewal options); Fifth Amendment to Lease
     between PBP Realty Partnership (Landlord) and Tektagen, Inc. (Tenant)
     dated August 1, 1997.
     (extends term to 7/31/02 and gives one 5 year renewal option).

15.  Lease Agreement between Wappoo Partners (Landlord) and Endosafe (Tenant)
     dated February 28, 1993; and Assignment and Assumption of Lease Agreement
     between Charles River Laboratories, Inc. (Acquiror) and Endosafe, Inc.
     (Exchangor) dated January 27, 1994.

16.  Amended and Restated Distribution Agreement between Charles River BRF,
     Inc. Charles River Laboratories, Inc., Bioculture Mauritius Ltd. and Mary
     Ann and Owen Griffiths, dated December 23, 1997.

17.  Supply Agreement for non-human primates among Sierra Biomedical, Inc. and
     Scientific Resources International, Ltd., dated March 18, 1997.







                                                                    EXHIBIT 10.7


                       CHARLES RIVER LABORATORTIES, INC.
                         Merck Primate Supply Agreement

         This PRIMATE SUPPLY AGREEMENT, by and between Merck & Co., Inc., a
New Jersey corporation with its principal offices at One Merck Drive,
Whitehouse Station, New Jersey 08889-0100 ("Customer"), and Charles River
Laboratories, Inc., 251 Ballardvale Street, Wilmington, Massachusetts 01887
("Charles River"), is made this 30th day of September, 1994.

         WHEREAS, Customer desires to obtain colony-reared rhesus primates for
its operations and to acquire an option to purchase such primates under the
terms and conditions of this Agreement; and

         WHEREAS, Charles River is willing to supply such primates to Customer
and to grant a purchase option to Customer, subject to the terms and
conditions specified below.

         Now, therefore, intending to be legally bound, Customer and Charles
River hereby agree as follows;

         1. Supply Commitment; Breeding and Resales.

               (a) Charles River will make available for purchase annually by
Customer the number of specific pathogen free, colony raised Macaca mulatta or
rhesus primates set forth on Schedule I-A hereto (the "Bred Primates"). Any
and all production in excess of the numbers set forth in Schedule I-A shall be
the sole property of Charles River and shall be freely saleable by Charles
River to third parties. Such Bred Primates will be sourced from Charles River's
breeding colonies located in the State of Florida (collectively, the
"Colonies"), including those at Key Lois, Raccoon Key and the Mannheimer
Foundation. The Bred Primates will be made available for delivery to Customer
in accordance with a shipment schedule to be established quarterly by mutual
agreement of the parties.

               (b) Customer may not resell or otherwise transfer to third
parties (other than its affiliates, being corporations in which Customer owns
at least a 51% equity interest) any Bred Primates it purchases from Charles
River under this Agreement, except that it may transfer those Bred Primates
which Customer purchases and takes actual possession of but does not require
for its then existing research and testing needs pursuant to the "take or pay"
commitment set forth in paragraph 2 and the inventory purchase option set
forth in paragraph 6.


<PAGE>




         2. Purchase Commitment

               (a) Customer hereby guarantees to purchase annually 100% of the
Bred Primates made available for sale by Charles River, as set forth on
Schedule I-A (in each case, the "Guaranteed Amount"). To the extent the number
of Bred Primates made available to Customer is less than the Guaranteed
Amount, then Customer shall be required to purchase only the actual available
amount. In no event will Customer have the right to cancel all or any part
of a given year's guaranteed purchase commitment.

               (b) In the event that Customer does not accept delivery of Bred
Primates in accordance with any mutually agreed upon delivery schedule,
Customer shall nonetheless be deemed to take risk of loss of all Bred primates
included in such delivery on the scheduled delivery date. Notwithstanding the
foregoing, all liability associated with said Bred Primates shall remain with
Charles River until delivery of the Bred Primates to Customer, F.O.B.
Customer's designated facility. Bred primates for which Customer takes risk of
loss but not actual possession shall be physically segregated by Charles
River, such that each Bred Primate owned by Customer may be specifically
identified as such. Risk of loss shall not vest in Customer as set forth in
this paragraph in the event that Customer is unable to accept any delivery due
to any force majeure.

               (c) To the extent that Customer fails to take delivery of the
Guaranteed Amount during the applicable calendar year, after consultation with
Customer, Charles River shall use commercially reasonable efforts to sell to
third-party customers the number of Bred Primates constituting the shortfall,
at prices to be determined by Charles River (following discussion with
Customer), and to credit 100% of the proceeds of such sales (net of reasonable
direct selling expenses) to Customer's account. Charles River's commitment to
sell Customers Bred Primates shall arise only after Charles River has sold all
of its excess production not committed to Customer. Except as specifically set
forth above, in no event shall Customer be released from its annual commitment
to pay Charles River for the Guaranteed Amount,

               (d) Any Bred Primates not shipped to Customer in accordance
with the quarterly shipment schedule shall be subject to monthly per diem
maintenance payments until such time as said Bred Primates are shipped to
Customer. The per them rates shall be as set forth in Schedule 1-B.

         3. Specifications. Schedule I hereto sets forth the number of Bred
Primates, which shall be 50% male and 50% female, to be supplied by Charles
River to Customer and comprising the Guaranteed Amount for each of the
calendar years indicated. Unless otherwise requested by Customer and agreed to
by Charles River, all the Bred Primates supplied hereunder will be of body
weight 2.0 to 2.9 kilograms for both males and females, and will meet the
health specifications set forth in Schedule II. Charles River

                                       2


<PAGE>



shall exercise reasonable diligence in maintaining and expanding the Colony to
meet the quantities specified on Schedule I and the health status specified on
Schedule II.

         4. Prices. Charles River will issue a quarterly written statement to
Customer for each Bred Primate at the time of shipment at the annual per-unit
prices specified on Schedule III within the desired weight range. An invoice
for shipping costs (including costs for crates, delivery and any excess per
diems) will be separately provided to Customer with each shipment. In no event
will per-unit prices charged to Customer for Bred Primates exceed the
then-current (i.e., in the same calendar year) price paid by other customers
purchasing primates sourced from the Colonies at the same male-to-female ratio
and within the desired (2.0 kg. - 2.9 kg.) weight range.

         5. Funding of Extraordinary Colony Relocation Costs.

               (a) Charles River has advised Customer that it intends to
transfer Bred Primates to a land-based colony established at the Mannheimer
Foundation ("MF") during the course of this Agreement, and Customer has agreed
to Charles River's designation of MF as the primary site for Charles River's
land-based colony of Bred Primates. For this purpose, the parties agree that
MF is a third party beneficiary of this Agreement. To the extent that Customer
reasonably requests Charles River to relocate Bred Primates to the MF colony
at a faster rate than currently proposed (i.e., at a rate which accelerates
Charles River's current 5-year plan to establish a self-sustaining colony of
900 Bred Primates suitable for breeding at MF's facilities by 1999 in
accordance with the schedule set forth on the attached Schedule IV), then
Customer hereby agrees to fully fund the actual additional costs associated
with any Customer requested accelerated relocation program, on payment terms
to be mutually agreed to by the parties, and supported by appropriate
documentation. To the extent that Bred Primates are transferred to the
land-based MF colony, they will still constitute "Inventory" for purposes of
Section 6 below.

               (b) Customer will also support Charles River's program for a
land-based colony at MF by funding construction of "mini-crib" family units
not to exceed $100,000. Funds will be payable to Charles River upon
completion of construction of the family units.

         6. Inventory Purchase Option.

               (a) Charles River hereby grants Customer an irrevocable option
(the "Option") to purchase all or that portion of the Bred Primates
constituting the Colonies as set forth in Section 6 (b) hereof (in either
case, the "Inventory") at the time of expiration of the Initial Term (as
defined in Section 13 below) at a cash purchase price equal to the inventory
value of the Bred Primates carried on Charles River's books and records at the

                                       3


<PAGE>


 time such Option is exercised. In the event this agreement is assigned and
 the Inventory value is "stepped-up" by the assignee, for purposes of this
 provision the Inventory value shall be deemed to exclude any such step-up.
 Inventory will be valued consistent with Charles River's historical
 practices, except that costs of transfers under Paragraph 5 borne by Customer
 will not be included in the inventory value for purposes of calculating the
 Option exercise price, Customer shall be obligated to deliver payment for
 such Inventory no later than thirty (30) days following the expiration of the
 Initial Term, at which time title to the Inventory purchased pursuant to the
 Option shall transfer to Customer. Customer shall not be required to make any
 advance payments in order to secure the Option granted pursuant to this
 Section 6(a) at the time of execution of this Agreement. Continuation of
 payments made under this Agreement, however, shall be deemed to constitute
 current consideration for the continuing offer of such Option. Customer may
 not exercise the Option during the specified exercise period if it is then
 currently in default under the terms of this Agreement.

               (b) At its election, Customer may exercise the Option either
(i) for the existing Inventory or (ii) for that part of the Inventory equal to
the number of Bred Primates necessay to produce offspring to fulfill
Customer's requirement of 650 equal sex Bred Primates annually. In the event
that Customer exercises the option for (ii), the number to fulfill such
requirement will be reduced by the aggregate number of offspring that were
purchased by Customer in the preceeding year pursuant to Paragraph 2 of this
agreement (the "take or pay" provision), but were not used for Customer's
research and testing. In any event, the Customer may not exercise the Option
for less than 50 percent of the Inventory as of the date of exercise.

               (c) In the event the Option is not exercised by Customer in
accordance with this Section 6, this Agreement shall automatically renew for
a two-year period, with annual 10% per-unit price increases to automatically
take effect during each of the two years included in such renewal period. Such
price increases shall be applicable to Guaranteed Amounts which shall, for
each year included in the automatic renewal period, be no less than the
Guaranteed Amount required to be purchased by Customer during the last full
year of the Initial Term. In the event of such a renewal, all other terms of
this Agreement shall remain unchanged (giving effect to expiration of the
Option).

               (d) In the event the Option is exercised by Customer in
accordance with this Section 6, Customer hereby agrees that in connection with
such exercise, it will simultaneously enter into a two-year primate colony
management agreement (the "Management Agreement") with Charles River on terms
mutually agreeable to the parties, pursuant to which CRL will manage (on a
full cost reimbursement basis plus 10%) the inventory acquired by Customer
through the exercise of the Option. In the event this Agreement is assigned to
a non-profit organization, the Management Agreement will be for cost only.
Said Management Agreement will include (i) indemnification by Charles


                                      4


<PAGE>



 River of Customer for any environmental liabilities associated with the Bred
 Primates owned by Customer and located on Key Lois or Raccoon Key, and (ii)
 provision for inspection of books and records by Customer to verify costs and
 expenses as the basis for the management fees. The indemnification provided
 under (i), will continue to be provided by Charles River in the event of any
 sale or assignment of this agreement to a third party. Charles River shall
 comply in all material respects with applicable USDA regulations governing
 the care of primates. Charles River will cooperate with Customer in the
 transfer, assignment and recording of all necessary documentation and to take
 such other actions for the transfer of ownership of the Colony at Customer's
 sole expense.

               (e) In the event Customer elects to exercise the Option for
less than the entire Colony, then the following conditions shall apply: (i)
the Bred Primates will be selected by Charles River on a representative cross
sectional basis, reflecting an equitable distribution of both sex, age, health
profiles and location and (ii) Charles River shall not be required to sell any
additional Bred Primates to Customer beginning with date on which the transfer
of ownership occurs.

               (f) Customer shall provide Charles River with a non-binding
written notice of its intent to exercise, in whole or in part, the Option no
later than two years prior to the exercise date, and a binding written notice
of exercise, in whole or in part, no later than one year prior to the exercise
date. Said written notices shall specify the quantity of Inventory intended to
be purchased by Customer, and other relevant information reasonably requested
by Charles River.

         7. Tests and Records. All of the Bred Primates supplied to Customer
will be tested by Charles River, in accordance with generally accepted testing
methods and techniques, to confirm that they meet the health specifications set
forth in Schedule II. The cost of testing will be charged and invoiced to
Customer separately only if said testing is not required to initially
demonstrate that the Bred Primates meet the specifications set forth in
Schedule II. Charles River shall provide Customer with a medical
history/record and a valid health certificate of each of the Bred Primates at
the time of shipment.

         8. Payment Terms. Within fifteen (15) days of execution of this
Agreement and, thereafter, at the beginning of each quarter throughout each of
the remaining calendar years included in the term of this Agreement, Customer
shall pay to Charles River an amount equal to the product of (i) the
Guaranteed Amount required to be purchased in that quarter and (ii) that
quarter's per-unit price for Bred Primates. Charles River will ship the Bred
Primates FOB destination, which will be designated by Customer in advance of
shipment and will insure the Bred Primates to the destination point. Customer
will pay all shipping costs (excluding insurance). Shipments will be made in
accordance with all material applicable state and federal laws. The resulting
amount shall

                                       5


<PAGE>



constitute advance payment against Customer purchases to be made in that
quarter, and shall not be refundable to Merck so long as Charles River is
able to provide Merck with Bred Primates substantially in accordance with the
delivery schedule mutually agreed to by the parties.

         9. Warranty; Disclaimer. Charles River represents and warrants that
each Bred Primate supplied by Charles River under this Agreement (or, if
applicable, to be transferred following exercise of the Option) shall meet all
of the specifications set forth in Schedule II hereto. THIS SHALL BE THE
EXCLUSIVE WRITTEN WARRANTY OF CHARLES RIVER AND THERE ARE NO FURTHER
WARRANTIES OR REPRESENTATIONS, EXPRESSED OR IMPLIED, INCLUDING AN IMPLIED
WARRANTY OF MERCHANTABILITY. IN NO EVENT SHALL CHARLES RIVER BE LIABLE FOR
CONSEQUENTIAL ECONOMIC DAMAGES OR CONSEQUENTIAL DAMAGE TO PROPERTY. If
Customer determines that any Bred Primate fails to meet such specifications
upon receipt, or if significant adverse health conditions develop within
twenty (20) days of receipt, it shall have the right to reject such Bred
Primate by notifying Charles River not later than twenty (20) days after
delivery of such Bred Primate to Customer; provided that for tuberculosis the
notice period shall be seventy (70) days after delivery (so long as the
TB-infected Bred Primate was not contaminated at Customer's facility).
Failure to reject any Bred Primate by such time shall constitute acceptance
thereof. If Customer rejects any Bred Primate hereunder, it shall have the
right to receive, at its option, either: (i) no charge replacement of such
Bred Primate from Charles River in accordance with the provisions hereof; or
(ii) a credit against future purchases equal to the purchase price of the
rejected Bred Primate and any shipping charges separately invoiced to Customer
in connection therewith.

         10. Indemnification. As a condition precedent to the delivery by
Charles River of Bred Primates hereunder, Customer shall execute and deliver
to Charles River the Primate Customer Indemnity Statement attached as Exhibit
A.

         11. Consultation Rights. Charles River shall actively and
continuously consult with appropriate representatives of Customer on all
strategic decisions affecting the Colony. Charles River shall also
periodically provide Customer with written information on the status of the
Colony, all material SOPs for its maintenance, and such other issues as the
parties may agree from time to time. In addition, Customer shall have the
right to direct Charles River's plan for Customer's capital contribution to
MF as provided in paragraph 5(b). Any input provided by Customer's
representatives shall not be binding upon Charles River, and Customer shall
not be liable therefore.


                                      6


<PAGE>



         12. Term and Termination. Subject to Section 6 above, this Agreement
shall take effect as of the date set forth above and will terminate on
December 31, 2000 (such six and one-half year period is referred to herein as
the "Initial Term"). Either party may terminate this Agreement for an
unremedied material breach of this Agreement which is not cured within ninety
(90) days of notice. This Agreement way be renewed by mutual written agreement
of the parties upon 12 months' prior written notice.

         13. Miscellaneous Legal Provisions.

               (a) It is not the intent of Charles River and Customer to form
any partnership or joint venture, and nothing contained herein shall be
construed to empower either party to act as agent for the other, The parties
agree that each of them shall, in relation to its obligations hereunder, be
acting as an independent contractor.

               (b) No party may assign this Agreement in whole or in part
without the prior written consent of the other parties; except that Charles
River may assign this Agreement without Customer's consent to (i) a non-profit
organization for any reason and at any time, and (ii) after December 31, 1995
to a for-profit organization for any reason; provided, however, that in the
case of any assignment without Customer's prior consent Charles River shall
guarantee to Customer that the Colony will be managed by the assignee
substantially in accordance with all mandatory AAALAC standards applicable to
such a primate operation. In the event of any assignment to a for-profit by
Charles River resulting in the sale of the Colony, Customer shall have the
right to match the terms of said sale upon thirty (30) days written notice,
Once assigned, all of the provisions of this Agreement and all the rights and
obligations of the parties hereunder shall be binding upon and inure to the
benefit of and be enforceable by the successors and assigns of the respective
parties.

               (c) Each party shall hold in confidence information concerning
this Agreement and the terms hereof and shall not make any public statements
or announcements about it, nor issue news releases relating to the existence
or implementation hereof. If either party receives requests for information
about this Agreement from outside organizations, each party will notify the
other party and in cooperation both parties will formulate a strategy and
response.

               (d) Neither Charles River nor Customer shall be liable to the
other in damages for, nor shall this Agreement be terminable or cancellable by
reason of, any delay or default in such party's performance hereunder if such
default or delay is caused by events beyond such party's reasonable control
including, but not limited to, acts of God, regulation or law or other action
of any government or agency thereof, war, insurrection, civil commotion,
destruction of facilities or materials by earthquake, fire, flood or storm,
labor disturbances, loss of breeding colony due to disease or failure of


                                       7


<PAGE>



suppliers, public utilities or common carriers or any actual or de facto import
embargoes or state import restrictions or limitations,

               (e) This Agreement shall be governed by and interpreted in
accordance with the laws of the Commonwealth of Massachusetts (regardless of
its, or any other jurisdiction's choice of law principles).

               (f) All correspondence and invoices pertaining to this
Agreement should be directed to Director, Laboratory Animal Resources,
WP44-201, Sunneytown Pike, West Point PA 19486 in the case of Customer, and
Mr. Robert C. Lorette in the case of Charles River.


MERCK & CO., INC. )                          CHARLES RIVER LABORATORIES, INC,


By: /s/ Edward M. Scolnick, M.D.             By: /s/ James C. Foster
   -------------------------------------        --------------------------------
   Edward M. Scolnick, M.D.                     James C. Foster
   Title: Exec. V.P., Science and               President and CEO
         Technology, Merck & Co., Inc. and
         President, Merck Research Labs


                                      8


<PAGE>




                                                                       Exhibit A

                          CHARLES RIVER LABORATORIES
                     Primate Customer Indemnity Agreement

         A.       Charles River Laboratories, Inc. ("Charles River") is engaged
in the sale of nonhuman primates, such as cynomolgus and rhesus monkeys, and
their tissue.

         B. These primates may harbor naturally occurring zoonotic infectious
agents, including viruses and bacteria that are dangerous and potentially
deadly to humans. Charles River employs the best practices commonly used by
the industry to detect these agents during a quarantine and conditioning
period and will carry out special supplemental examinations upon request,
Nevertheless, Charles River cannot guarantee that the primates it sells will
be free of these agents.

         C. Primates and primate tissue can be safely handled to avoid risk
to the handler from these harmful agents, but the safe handling of these
primates or their tissue is out of the control of Charles River after
shipment. The responsibility for protecting individuals who may come in
contact with these primates after shipment must therefore, rest with the
purchaser.

         D. Charles River is unwilling to sell primates or primate tissue to
the undersigned (Customer) in light of the potential risk of litigation and
liability to Charles River without indemnification from Customer.

         E. Customer wishes to purchase primates or their tissue from Charles
River, and In order to induce Charles River to make such sales, Customer is
providing Charles River with the following indemnity.

         In consideration of the foregoing, and intending to be legally
bound, Customer and Charles River agree as follows:

1. Indemnity. Customer hereby agrees, to indemnify and hold harmless Charles
River, its parent subsidiaries and affiliates and their respective officers,
employees and directors against any and all liability, loss, damage, cost or
expense (including attorneys' fees and expenses and costs of investigation)
which any of them may hereafter incur, suffer or be required to pay as the
result of any damage suffered or alleged to be suffered, including, without
limitation, death or personal injury and any direct, consequential, special and
punitive damages, as the result of a Charles River primate or primate tissue
after such primate or tissue has been delivered to Customer; provided,
however, that such loss, liability or damage is not attributable to the fraud,
gross negligence, malfeanance or willful misconduct of Charles River.


                                      A-1


<PAGE>



2. Terms and Conditions of Sale. Notwithstanding anything else set forth in
any other document furnished by Customer to Charles River including any
purchase order, any sales of primates and primate tissue made by Charles River
to Customer shall be on Charles River's standard terms and conditions of sale
as set forth in the Primate Supply Agreement with Customer (the "'Agreement").
Except as specifically set forth in the Agreement, Charles River makes no
warranties of any kind with respect to primates or primate tissue it sells;
ALL OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
DISCLAIMED. CHARLES RIVER'S LIABILITY IS SPECIFICALLY LIMITED TO REPLACEMENT
OF PRODUCT SOLD OR REFUND Of PURCHASE PRICE AS PROVIDED IN THE AGREEMENT, AND
IN THE ABSENCE OF FRAUD, GROSS NEGLIGENCE, MALFEASANCE OR WILLFUL MISCONDUCT
BY CHARLES RIVER AND IN NO EVENT SHALL CHARLES RIVER BE LIABLE FOR ANY OTHER
DAMAGES, INCLUDING, WITHOUT LIMITATION, DIRECT, CONSEQUENTIAL, SPECIAL OR
PUNITIVE DAMAGES.

3. Miscellaneous. This agreement shall be binding on and inure to the benefit
of and be enforceable by Charles River and Customer and their respective
successors and assigns. This Agreement shall be governed by the laws of
Massachusetts. This Agreement is intended to take effect as a sealed
instrument.

         IN WITNESS WHEREOF, Charles River and Customer have each caused
this Agreement to be executed on their respective behalves under seal by their
duly authorized officers as of the date below.


CHARLES RIVER LABORATORIES, INC.        MERCK & CO., INC.


By: /s/ James C. Foster                 By: /s/ Edward M. Sculnick, M.D.
   -------------------------------         -------------------------------------
   James C. Foster                         Edward M. Sculnick, M.D.
   President and CEO                       Title: Exec. V.P., Science and
                                                  Technology. Merck & Co., Inc.
                                                  and President, Merck Research
                                                  Labs
                                           Date:  September 30, 1994


                                     A-2


<PAGE>



                                                                    Schedule I-A

                          ANNUAL GUARANTEED PURCHASES

                                          Guaranteed Amount
                                         of Annual Purchases
                    Calendar Year        In Units (Equal Sex)
                    -------------        --------------------
                        1994                       400
                        1995                       500
                        1996                       550
                        1997                       550
                        1998                       600
                        1999                       600
                        2000                       650

*  164 to be shipped between October 1 and December 31, 1994, of which 80 have
   been prepaid.


<PAGE>



                                                                    Schedule I-B

PER DIEM PAYMENTS

Key Lois Facility: $2.00 per day for animals not taken in quarterly
                   distribution.

                   S4.00 per day for animals ready for shipment but delayed by
                   customer.

MF                 $2.00 per day for animals not taken in quarterly
                   distribution.

                   $5.00 per day for animals ready for shipment by delayed by
                   customer.

                        These costs increase 5% per calendar year.


<PAGE>
                                                                     SCHEDULE II


                 SPECIFICATIONS FOR COLONY-REARED PRIMATES

All Bred Primates provided to Customer must meet the following specifications:

I  The animals provided must be tested free of the following infectious
   disease-causing agents:

   o     Common pathogenic external and internal hehminth and arthropod
         parasites
   o     Tuberculosis
   o     Salmonella/Shigella
   o     Herpes B virus
   o     SAIDS virus complex (SRV1, SRV2, SIV)
   o     Rabies
   o     Tetanus
   o     Filovirus

2. Prior to shipping, vendor must notify Customer of any other known
   significant infectious diseases causing agents in the breeding colony
   of origin, such as hemo- and enteric-protozoal parasites; entetic
   bacterial pathogens, and viral agents such as Hepatitis A, Measles,
   and Monkey Pox.

3. The following veterinary and husbandry procedures must be performed
   prior to shipment:

   (a)   Three negative TB tests given at intervals of approximately two weeks
         within six weeks of shipment.

   (b)   Rectal cultures just prior to shipment negative for enteric bacterial
         pathogens such as Salmonell and Shigella.

4. Each animal delivered is to have an individual animal record sent
   with the animal, or under separate cover, which will include such
   information as: month of birth; socialization information, such as
   cage/pen mates; and health information, such as all treatments, test
   results, etc.

5. Charles River will develop and implement a genetic monitoring plan
   for the Colony.


<PAGE>



6. All Bred Primates will be permanently identified with a legible tattoo or
   other means such as implantable micro-cbip as agreed to by Customer (chips
   will be supplied by Customer).

7. A valid health certificate will be provided for each shipment of animals.

8. Charles River must notify customer of any known deviation from these
   specifications prior to departure of any shipment of animals to a Merck
   designated site.


<PAGE>



                                                                    Schedule III

                                    PRICES

            Calendar Year                                 Prices
            -----------------------------------------------------
               1994 (partial)                             $ 3,650
               1995                                       $ 4,015
               1996                                       $ 4,420
               1997                                       $ 4,865
               1998                                       $ 5,350
               1999                                       $ 5,885
               2000                                       $ 6,475


<PAGE>



                                                                     Schedule IV

                       MANNHEIMER COLONY BUILD-UP PLAN

                                          Number of Bred Primates
     Calendar Year                            Comprising Colony
     -------------                        -----------------------
          1995                                      500
          1996                                      650
          1997                                      750
          1998                                      850
          1999                                      900
          2000                                      900



                                                                    Exhibit 10.8

                                                                  Execution Copy
- -------------------------------------------------------------------------------








                              AMENDED AND RESTATED
                            STOCK PURCHASE AGREEMENT



                                     AMONG



                        CHARLES RIVER LABORATORIES, INC.


                                      AND


                               SBI HOLDINGS, INC.
                              AND ITS STOCKHOLDERS



                               SEPTEMBER 4, 1999








- -------------------------------------------------------------------------------




<PAGE>


                               TABLE OF CONTENTS

                                                                            Page
                                                                            ----
1.  Definitions...............................................................1
    1.1.     Defined Terms....................................................1
    1.2.     Additional Provisions............................................9
2.  Acquisition of Stock by Buyer............................................10
    2.1.     Purchase and Sale of Stock......................................10
    2.2.     Purchase Price..................................................10
    2.3.     Working Capital Adjustment......................................11
    2.4.     Purchase Price Adjustment.......................................11
    2.5.     The Closing.....................................................12
    2.6.     Deliveries at the Closing.......................................12
3.  Representations and Warranties Regarding the Company.....................12
    3.1.     Organization of the Company.....................................12
    3.2.     Capitalization and Ownership of the Company.....................12
    3.3.     Authorization of Transaction....................................13
    3.4.     Noncontravention................................................13
    3.5.     Brokers' Fees...................................................14
    3.6.     Title to Assets.................................................14
    3.7.     Subsidiaries....................................................14
    3.8.     Financial Statements............................................15
    3.9.     Absence of Certain Changes and Events...........................15
    3.10.    Absence of Undisclosed Liabilities..............................17
    3.11.    Legal and Other Compliance......................................18
    3.12.    No Material Adverse Change......................................18
    3.13.    Taxes...........................................................18
    3.14.    Property, Plant and Equipment...................................20
    3.15.    Intellectual Property...........................................22
    3.16.    Inventories.....................................................24
    3.17.    Contracts.......................................................24
    3.18.    Accounts Receivable.............................................26
    3.19.    Insurance and Risk Management...................................26
    3.20.    Litigation......................................................27
    3.21.    Product Warranties; Defects; Liability..........................27
    3.22.    Employees.......................................................27
    3.23.    Employee Benefits...............................................28
    3.24.    Environment, Health and Safety..................................30
    3.25.    Affiliated Transactions.........................................32
    3.26.    Distributors, Customers, Suppliers..............................32
    3.27.    No Illegal Payments, Etc........................................33
    3.28.    Books and Records...............................................33
    3.29.    Consents........................................................33

                                       i
<PAGE>


    3.30     Disclosure......................................................33
3A. Representations and Warranties Regarding Sellers.........................34
    3A.1.    Title to Shares.................................................34
    3A.2.    Authorization of Transaction....................................34
    3A.3.    Noncontravention................................................34
4.  Representations and Warranties of the Buyer..............................35
    4.1.     Organization of the Buyer.......................................35
    4.2.     Authority for Agreement.........................................35
    4.3.     Noncontravention................................................35
    4.4.     Brokers' Fees...................................................35
5.  Covenants................................................................35
    5.1.     General.........................................................35
    5.2.     Notices and Consents............................................35
    5.3.     Operation of Business...........................................36
    5.4.     Preservation of Business........................................36
    5.5.     Full Access.....................................................36
    5.6.     Notice of Redemption of Series A Preferred Stock................37
    5.7.     Notice of Developments..........................................37
    5.8.     Exclusivity.....................................................37
    5.9.     Assistance in Financing.........................................37
    5.10.    Access to Records after Closing.................................37
    5.11.    Future Assurances...............................................38
    5.12.    Release of Guarantees...........................................38
6.  Conditions to Obligation to Close........................................38
    6.1.     Conditions to Obligation of the Buyer...........................38
    6.2.     Conditions to Obligations of the Sellers........................40
7.  Confidentiality..........................................................41
8.  Noncompetition...........................................................42
9.  Indemnification..........................................................42
    9.1.     Survival of Representations and Warranties......................42
    9.2.     Indemnity by Sellers Relating to the Company....................43
    9.3.     Indemnity by Sellers............................................44
    9.4.     Indemnity by Buyer..............................................44
    9.5.     Matters Involving Third Parties.................................45
    9.6.     Other Indemnification Provisions................................46
10. Termination..............................................................46
    10.1.    Termination of Agreement........................................47
    10.2.    Effect of Termination...........................................48
11. Miscellaneous............................................................48
    11.1.    Press Releases and Public Announcements.........................48
    11.2.    No Third Party Beneficiaries....................................48
    11.3.    Seller Representative...........................................48
    11.4.    Entire Agreement................................................48
    11.5.    Succession and Assignment.......................................49

                                      ii
<PAGE>


    11.6.    Counterparts....................................................49
    11.7.    Headings........................................................49
    11.8.    Notices.........................................................49
    11.9.    Governing Law...................................................50
    11.10.   Arbitration.....................................................50
    11.11.   Amendments and Waivers..........................................51
    11.12.   Severability....................................................51
    11.13.   Expenses........................................................52
    11.14.   Construction....................................................52
    11.15.   Incorporation of Exhibits and Schedules.........................52


Exhibits

2.1               Sellers

2.2               Form of Escrow Agreement

2.3               Target Working Capital

3.8               Financial Statements

6.1(f)(i)         Form of Employment Agreement

6.1(f)(ii)        Form of Noncompetition Agreement

6.2(c)            Form of Performance Bonus Plan

9.2               Indemnification



                                      iii
<PAGE>


                              AMENDED AND RESTATED
                            STOCK PURCHASE AGREEMENT

     This Amended and Restated Stock Purchase Agreement (the "Agreement"),
dated as of September 4, 1999, is by and among Charles River Laboratories,
Inc., a Delaware corporation (the "Buyer"), SBI Holdings, Inc., a Nevada
corporation ("SBI" or the "Company"), and each of the persons listed on the
signature pages hereto as sellers (collectively, the "Sellers"). The Buyer, the
Company and the Sellers collectively are referred to herein as the "Parties."

     Certain of the Parties are party to a stock Purchase Agreement dated as of
September 3, 1999 (the "Original Agreement").

     This Agreement contemplates a transaction in which the Buyer will purchase
at the Closing all of the then outstanding shares of Common Stock of the
Company (the "Shares") in consideration of the Aggregate Purchase Price. Prior
to the Closing, all of the options and warrants to purchase Common Stock shall
have been exercised or terminated.

     Now, therefore, in consideration of the premises and the mutual promises
herein made, and in consideration of the representations, warranties and
covenants herein contained, the Parties agree as follows: 1. Definitions. 1.1.
Defined Terms. As used herein, the following terms shall have the meaning
herein specified:

     "AAA" has the meaning set forth in Section 11.10(a).

     "Actual Working Capital" means the Working Capital as reflected in the
Closing Date Balance Sheet.

     "Affiliate" of any specified Person means (i) any other Person which
directly or indirectly through one or more intermediaries controls, or is
controlled by, or is under common control with, such specified Person (for the
purposes of this definition, "control" (including, with correlative meanings,
the terms "controlling," "controlled by" and "under common control with"), as
used with respect to any Person, means the possession, directly or indirectly,
of the power to direct or cause the direction of the management or policies of
such Person, whether through the ownership of voting securities, by agreement
or otherwise), (ii) any Person who is or has been within two years prior to the
time in question an officer, director or direct or indirect beneficial holder
of at least 5% of any class of the outstanding capital stock or other evidence
of beneficial interest of such specified Person and the Members of the
Immediate Family of each such officer, director or holder (and, if such
specified Person is a natural person, of such specified Person) and (iii) each
Person of which such specified Person or an Affiliate (as defined in clauses
(i) or (ii) above) thereof shall, directly or



<PAGE>


indirectly, beneficially own at least 5% of any class of outstanding capital
stock or other evidence of beneficial interest at such time.

     "Affiliated Group" means any affiliated group within the meaning of
Section 1504(a) of the Code or any similar group defined under a similar
provision of state, local, or foreign law.

     "Aggregate Closing Payment" has the meaning set forth in Section 2.2.

     "Aggregate Purchase Price" means $24,000,000 (Twenty-Four Million
Dollars), as such amount may be adjusted pursuant to Sections 2.3 and 2.4.

     "Agreement" has the meaning set forth in the preamble above.

     "Basis" means any past or present fact, situation, circumstance, status,
condition, activity, practice, plan, occurrence, event, incident, action,
failure to act, or transaction that forms or could reasonably form the basis
for any specified consequence.

     "Buyer" has the meaning set forth in the preamble above.

     "Chemical Substance" means any chemical substance, including but not
limited to any: (i) pollutant, contaminant, irritant, chemical, raw material,
intermediate, product, by-product, slag, construction debris; (ii) industrial,
solid, liquid or gaseous toxic or hazardous substance, material or waste; (iii)
petroleum or any fraction thereof; (iv) asbestos or asbestos-containing
material; (v) polychlorinated biphenyl; (vi) chlorofluorocarbons; and, (vii)
any other substance, material or waste, which is identified or regulated under
any Environmental Law or Safety Law, as now and hereinafter in effect, or other
comparable laws.

     "Closing" has the meaning set forth in Section 2.5.

     "Closing Agreements" means the Employment Agreements, the Noncompetition
Agreements, the Performance Bonus Plan and the Performance Bonus Agreements.

     "Closing Balance Sheet" has the meaning set forth in Section 2.3(a).

     "Closing Date" has the meaning set forth in Section 2.5.

     "Code" means the Internal Revenue Code of 1986, as amended.

     "Common Stock" has the meaning set forth in Section 3.2.

     "Company" has the meaning set forth in the preamble above and, where
applicable, in Section 3.

                                       2
<PAGE>


     "Company Permits" has the meaning set forth in Section 3.11.

     "Confidential Information" means any and all information concerning the
businesses and affairs of the Company other than that information which is
already generally or readily obtainable by the public or is publicly known or
becomes publicly known through no fault of the Sellers.

     "Controlled Group of Corporations" has the meaning set forth in Section
1563 of the Code.

     "Deferred Intercompany Transaction" has the meaning set forth in Treas.
Reg. Section 1.1502-13.

     "Disclosure Schedule" has the meaning set forth in Section 3.

     "Dispute Notice" has the meaning set forth in Section 2.3(b).

     "Employee Benefit Plan" means any (i) nonqualified deferred compensation
or retirement plan or arrangement which is an Employee Pension Benefit Plan,
(ii) qualified defined contribution retirement plan or arrangement which is an
Employee Pension Benefit Plan, (iii) qualified defined benefit retirement plan
or arrangement which is an Employee Pension Benefit Plan (including any
Multiemployer Plan), (iv) Employee Welfare Benefit Plan or material fringe
benefit plan or program or (v) profit sharing, stock option, stock purchase,
equity, stock appreciation, bonus, incentive deferred compensation, severance
plan or other benefit plan.

     "Employee Pension Benefit Plan" has the meaning set forth in Section 3(2)
of ERISA.

     "Employee Welfare Benefit Plan" has the meaning set forth in Section 3(l)
of ERISA.

     "Environment" means soil, land surface or subsurface strata, real
property, surface waters (including navigable waters, ocean waters, streams,
ponds, drainage basins and wetlands), groundwater, water body sediments,
drinking water supply, stream sediments, ambient air (including indoor air),
plant and animal life and any other environmental medium or natural resource.

     "Environmental Laws" mean the Comprehensive Environmental Response,
Compensation and Liability Act, the Resource Conservation and Recovery Act and
the Clean Air Act, the Clean Water Act, each, as amended or hereinafter in
effect, and any other law or legal requirement, as now or hereinafter in
effect, relating to: (i) the Release, containment, removal, remediation,
response, cleanup or abatement of any sort of any Chemical Substance; (ii) the
manufacture, generation, formulation, processing, labeling, distribution,
introduction into commerce, use, treatment, handling, storage, recycling,
disposal or transportation of any

                                       3
<PAGE>


Chemical Substance; (iii) exposure of persons, including employees, to any
Chemical Substance; (iv) the physical structure, use or condition of a
building, facility, fixture or other structure, including, without limitation,
those relating to the management, use, storage, disposal, cleanup or removal of
asbestos, asbestos-containing materials, polychlorinated biphenyls or any other
Chemical Substance; (v) the pollution, protection or clean up of the
Environment; (vi) noise; or (vii) other environmental or natural resource
matters.

     "Environmental Liabilities and Costs" means all Losses arising from,
imposed or incurred in connection with: (i) compliance with any Environmental
Law; (ii) a Release of any Chemical Substance; or (iii) any environmental
conditions present at, created by or arising out of the past or present
operations of the Company or its Subsidiaries (or any of their respective
predecessor entities) through the Closing Date or of any prior owner or
operator of a facility or site at which the Company or its Subsidiaries (or any
of their respective predecessor entities) now operates or has previously
operated.

     "Environmental Permits" means any Permit or authorization from any
governmental authority required under, issued pursuant to, or authorized by any
Environmental Law.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

     "Escrow Agent" has the meaning set forth in Section 2.2.

     "Escrow Amount" has the meaning set forth in Section 2.2(a).

     "Fiduciary" has the meaning set forth in Section 3(21) of ERISA.

     "Financial Statements" has the meaning set forth in Section 3.8.

     "GAAP" means United States generally accepted accounting principles as in
effect from time to time.

     "Hart-Scott-Rodino Act" means the Hart-Scott-Rodino Antitrust Improvements
Act of 1976, as amended.

     "Imperial Warrant" means the Warrant to Purchase Stock issued by the
Company to Imperial Bancorp on January 21, 1999, as amended, restated or
otherwise modified.

     "Indebtedness" means, with respect to any Person, the aggregate amount
received from customers in advance of work to be performed for such customers
by such Person and all obligations of such Person (i) for borrowed money, (ii)
evidenced by notes, bonds, debentures or similar instruments (including,
without limitation, any notes issued by the Company in connection with the
purchase of any of its Common Stock or other equity interests), (iii) for the
deferred purchase price of goods or services (other than trade payables or
accruals incurred

                                       4
<PAGE>


in the Ordinary Course of Business which are not more than 90 days past due),
(iv) under capital leases or (v) in the nature of guarantees of the obligations
described in clauses (i) through (iv) above of any other Person.

     "Indemnified Party" has the meaning set forth in Section 9.4(a).

     "Indemnifying Party" has the meaning set forth in Section 9.4(a).

     "Independent Accountant" has the meaning set forth in Section 2.3(b).

     "Intellectual Property" means the entire right, title and interest in and
to all proprietary rights of every kind and nature, including Patents,
copyrights, Trademarks, mask works, trade secrets and proprietary information,
all applications for any of the foregoing, and any licenses or agreements
granting rights related to the foregoing (i) subsisting in, covering, reading
on, directly applicable to or existing in the Products and Services or the
Technology, including, without limitation, all Intellectual Property identified
in Schedule 2.1(d), (ii) that are owned, licensed or controlled in whole or in
part by the Company and relate to the business of the Company or (iii) that are
used in or necessary to the development, manufacture, sales, marketing or
testing of the Products and Services.

     "Laws" means all laws, rules, regulations, codes, injunctions, judgments,
decrees, rulings, interpretations, constitution, ordinance, common law, treaty,
regulations, or orders, of any federal, state, local, municipal and foreign,
international, or multinational governments or administration and all related
agencies, including, without limitation all laws, rules and regulations of the
United States Department of Agriculture.

     "Liability" means any liability or obligation (whether known or unknown,
whether asserted or unasserted, whether absolute or contingent, whether accrued
or unaccrued, whether liquidated or unliquidated, whether incurred or
consequential and whether due or to become due), including, without limitation,
any liability for Taxes.

     "Lien" means any mortgage, pledge, lien, security interest, charge, claim,
equitable interest, encumbrance, restriction on transfer, conditional sale or
other title retention device or arrangement (including, without limitation, a
capital lease), transfer for the purpose of subjection to the payment of any
Indebtedness, or restriction on the creation of any of the foregoing, whether
relating to any property or right or the income or profits therefrom; provided,
however, that the term "Lien" shall not include (i) statutory liens for Taxes
to the extent that the payment thereof is not in arrears or otherwise due, (ii)
encumbrances in the nature of zoning restrictions, easements, rights or
restrictions of record on the uses of real property if the same do not detract
from the value of the property encumbered thereby or impair the use of such
property in the business of the Company as currently conducted, (iii) statutory
or common law liens to secure landlords, lessors or renters under leases or
rental agreements confined to the premises rented to the extent that no payment
or performance

                                       5
<PAGE>


under any such lease or rental agreement is in arrears or is otherwise due,
(iv) deposits or pledges made in connection with, or to secure payment of,
worker's compensation, unemployment insurance, old age pension programs
mandated under applicable laws or other social security regulations and (v)
statutory or common law liens in favor of carriers, warehousemen, mechanics and
materialmen, statutory or common law liens to secure claims for labor,
materials or supplies and other like liens, which secure obligations to the
extent that payment thereof is not in arrears or otherwise due in the case of
(i)-(v), which have been incurred in the Ordinary Course of Business.

     "Losses" has the meaning set forth in Section 9.2.

     "Material Adverse Effect" means a material adverse effect on (i) the
business, financial condition, operations, results of operations or prospects
of the Company or any of its Subsidiaries or (ii) the ability of the Sellers to
consummate the transactions contemplated by this Agreement and the Closing
Agreements and to perform their respective obligations hereunder and
thereunder.

     "Member of the Immediate Family" of any specified Person, means each
spouse, parent, aunt, uncle, brother, sister or child of such Person, each
spouse and each child of any of the aforementioned Persons, each trust created
in whole or in part for the benefit of one or more of the aforementioned
Persons and each custodian or guardian of any property of one or more of the
aforementioned Persons.

     "Most Recent Balance Sheet" means the balance sheet contained within the
Most Recent Financial Statements.

     "Most Recent Financial Statements" means, collectively, (i) the audited
Financial Statements of SBI and (ii) the unaudited Financial Statements of HTI
Bio-Services, Inc. for the Most Recent Fiscal Year End.

     "Most Recent Fiscal Year End" has the meaning set forth in Section 3.8.

     "Multiemployer Plan" has the meaning set forth in Section 3(37) of ERISA.

     "Ordinary Course of Business" means the ordinary course of business
consistent with past custom and practice (including with respect to quantity,
timing and frequency).

     "Original Agreement" has the meaning set forth in the Preamble.

     "Parties" has the meaning set forth in the preamble above.

     "Payment Date" has the meaning set forth in Section 10.3.

                                       6
<PAGE>


     "PBGC" means the Pension Benefit Guaranty Corporation.

     "Performance Bonus Plan" has the meaning set forth in Section 6.2(e).

     "Permit" has the meaning set forth in Section 3.11.

     "Person" means any individual, partnership, corporation, limited liability
company, association, joint stock company, trust, joint venture, unincorporated
organization, governmental entity (or any department, agency, or political
subdivision thereof) or other legal entity of any kind.

     "Pro Rata Share" means, with respect to any Seller, (a) the number of
shares of Common Stock of SBI sold by such Seller to the Buyer hereunder
divided by (b) the aggregate number of shares of Common Stock sold by all
Sellers to the Buyer hereunder.

     "Product and Service" means all current products and services of the
Company and its Subsidiaries, any subsequent versions of such products and
services currently being developed, any products or services currently being
developed by the Company or its Subsidiaries which are designed to supersede,
replace or function as a component of such products or services, and any
upgrades, enhancements, improvements and modifications to the foregoing.

     "Prohibited Transaction" has the meaning set forth in Section 406 of ERISA
and Section 4975 of the Code.

     "Recap Agreement" has the meaning set forth in Section 2.1.

     "Release" means any actual, threatened or alleged spilling, leaking,
pumping, pouring, emitting, dispersing, emptying, discharging, injecting,
escaping, leaching, dumping, or disposing of any Chemical Substance into the
Environment that may cause an Environmental Liability and Cost (including the
disposal or abandonment of barrels, containers, tanks or other receptacles
containing or previously containing any Chemical Substance).

     "Reportable Event" has the meaning set forth in Section 4043 of ERISA.

     "Safety Laws" means the Occupational Safety and Health Act and any other
federal, state, local and foreign law, regulation or legal requirement relating
to health or safety, each as now or hereinafter in effect, including any such
law, regulation or legal requirement relating to the (a) exposure of employees
to any Chemical Substance, air quality or working conditions or noise or (b)
the physical structure, use or condition of a building, facility, fixture or
other structure, including, without limitation, those relating to equipment or
manufacturing processes, or the management, use, storage, disposal, cleanup or
removal of any Chemical Substances, air quality or working conditions.

                                       7
<PAGE>


     "Safety Liabilities and Costs" means all Losses arising from, imposed or
incurred in connection with compliance with any Safety Law or as a result of
any health or safety conditions present at, created by or arising out of the
past or present operations of the Company through the Closing Date.

     "SBI" has the meaning set forth in the preamble above.

     "SBI EBITDA" has the meaning set forth in the Performance Bonus Plan.

     "Securities Act" means the Securities Act of 1933, as amended.

     "Securities Exchange Act" means the Securities Exchange Act of 1934, as
amended.

     "Seller Employees" means William Hobson, Jean Bees, Doug Kornbrust, Nancy
Gillett, Dave McCaslin, Karol Bice-Godwin, John Kapeghian, Donna Eisenhauer,
Belinda Fuller, Martin Brett, Glen Elliott and Mark Young.

     "Seller Representative" has the meaning set forth in Section 11.3.

     "Sellers" has the meaning set forth in the preamble above.

     "Series A Preferred Stock" has the meaning set forth in Section 3.2.

     "Shares" has the meaning set forth in the preamble above.

     "Subsidiary" means, with respect to any Person, (i) any corporation at
least a majority of whose outstanding voting stock is owned, directly or
indirectly, by such Person or by one or more of its Subsidiaries, or by such
Person and one or more of its Subsidiaries, (ii) any general partnership, joint
venture or similar entity, at least a majority of whose outstanding partnership
or similar interests shall at the time be owned by such Person, or by one or
more of its Subsidiaries, or by such Person and one or more of its Subsidiaries
and (iii) any limited partnership of which such Person or any of its
Subsidiaries is a general partner. For the purposes of this definition, "voting
stock" means shares, interests, participations or other equivalents in the
equity interest (however designated) in such Person having ordinary voting
power for the election of a majority of the directors (or the equivalent) of
such Person, other than shares, interests, participations or other equivalents
having such power only by reason of contingency.

     "Target Working Capital" means the amount set forth in Exhibit 2.3 as the
Target Working Capital.

     "Tax" or "Taxes" means any federal, state, local, or foreign income, gross
receipts, license, payroll, employment, excise, severance, stamp, occupation,
premium, windfall

                                       8
<PAGE>


profits, environmental (including taxes under Section 59A of the Code), customs
duties, capital stock, franchise, profits, withholding, social security (or
similar, including FICA), unemployment, disability, real property, personal
property, sales, use, transfer, registration, value added, alternative or
add-on minimum, estimated, or other tax of any kind whatsoever, including any
interest, penalty, or addition thereto, whether disputed or not.

     "Tax Return" means any return, declaration, report, claim for refund, or
information return or statement relating to Taxes, including any schedule or
attachment thereto, and including any amendment thereof.

     "Technology" means all inventions, copyrightable works, discoveries,
innovations, know-how, information (including ideas, research and development,
know-how, formulas, compositions, processes and techniques, technical data,
designs, drawings, specifications, customer and supplier lists, pricing and
cost information, business and marketing plans and proposals, documentation and
manuals), computer software, computer hardware, integrated circuits and
integrated circuit masks, electronic, electrical and mechanical equipment and
all other forms of technology, including improvements, modifications,
derivatives or changes, whether tangible or intangible, embodied in any form,
whether or not protected or able to be protected by patent, copyright, mask
work right, trade secret law or otherwise.

     "Third Party Claim" has the meaning set forth in Section 9.4(a).

     "Trademarks" means any trademarks, service marks, trade dress and logos,
together with all translations, adaptations, derivations and combinations
thereof and including all goodwill associated therewith.

     "Working Capital" means the excess of (i) (a) cash and cash equivalents,
(b) net accounts receivable, (c) inventory and (c) prepaid expenses over (b)
(i) accounts payable (except for any accounts payable greater than 90 days),
(ii) accrued employee compensation and benefits and (iii) accrued liabilities
(except for obligations for deferred taxes and Indebtedness (x) to the Lee
Trust, (y) under capital leases and (z) to the Imperial Bank solely in respect
of the term loan); it being understood and agreed that the aggregate amount
received from customers in advance of work to be performed for such customers
shall not be included in the calculation of Working Capital.

     1.2. Additional Provisions. In addition to the definitions set forth
above:

          (a) The words "hereof," "herein," "hereunder" and words of similar
     import shall refer to this Agreement as a whole and not to any particular
     Section or provision of this Agreement, reference to a particular Article
     of this Agreement shall include all Sections thereof and reference to a
     particular Section of this Agreement shall include all subsections
     thereof.

                                       9
<PAGE>

          (b) Definitions shall be equally applicable to both the singular and
     plural forms of the terms defined, and references to the masculine,
     feminine or neuter gender shall include each other gender.

2.   Acquisition of Stock by Buyer.

     2.1. Purchase and Sale of Stock. Immediately following the closing under
the Recapitalization Agreement dated as of July 25, 1999 among Bausch & Lomb,
Incorporated, CRL Holdings, Inc., the Buyer and certain other parties named
therein (as amended, the "Recap Agreement") and subject to and upon the terms
and conditions contained herein, each Seller agrees to sell and transfer to the
Buyer that number of Shares set forth opposite such Seller's name on Exhibit
2.1, and the Buyer agrees to purchase all and not less than all of the Shares
from each of the Sellers at the Closing in consideration of the payment of the
Aggregate Purchase Price; it being understood and agreed that each holder of an
option to purchase shares of Common Stock shall be deemed to have exercised
such option on the Closing Date immediately before the Closing.

     2.2. Purchase Price. The Buyer agrees to pay to the Sellers at the Closing
an aggregate amount (the "Aggregate Closing Payment") equal to (a) the
Aggregate Purchase Price less (b) the amount of the Company's Indebtedness plus
accrued but unpaid interest thereon and all other amounts due in respect
thereof upon discharge in full on the Closing Date, including prepayment,
breakage or other related fees, expenses or penalties less (c) the amount
required to redeem on the Closing Date the outstanding Series A Preferred Stock
less (d) the amount payable to Gary Chellman in connection with the
consummation of the transaction contemplated hereby less (e) the amount, if
any, actually paid by the Company pursuant to or in connection with the
Imperial Warrant plus (f) the amount actually spent by the Company on capital
expenditures from the date of this Agreement through the Closing Date not in
excess of $250,000 plus (g) the amount, if any, actually paid by the Company
pursuant to Section 6.13 of the Share Purchase Agreement dated as of January 4,
1999 by and among Sierra Biomedical, Inc., the stockholders of HTI
Bio-Services, Inc. and HTI Bio-Services, Inc. The Aggregate Closing Payment
shall be payable as follows:

          (i) $3,750,000 in cash (the "Escrow Amount") payable by wire transfer
     to a Person designated by the Buyer subject to the reasonable consent of
     the Seller Representative, as escrow agent (the "Escrow Agent"), to be
     held in escrow pursuant to the Escrow Agreement among the Parties and the
     Escrow Agent substantially in the form of Exhibit 2.2; and

          (ii) cash payable by wire transfer to the Sellers, as more fully set
     forth on Schedule 2.2, in accordance with written instructions of each
     such Seller given to the Buyer at least two business days prior to the
     Closing in an amount equal, in the aggregate, to the Aggregate Closing
     Payment less the Escrow Amount

     2.3. Working Capital Adjustment.

     (a) As soon as practicable, but in no event later than 60 days after the
Closing Date, the Buyer shall prepare and deliver to the Sellers an unaudited
consolidated balance sheet of the Company as of the close of business on the
Closing Date (the "Closing Balance Sheet") prepared in accordance with GAAP on
a basis consistent with past practice. The Buyer shall prepare and deliver, or
cause to be prepared and delivered, to the Sellers, simultaneously with the
delivery of the Closing Date Balance Sheet, a statement setting forth in
reasonable detail the Buyer's calculation of the Actual Working Capital.

     (b) The Closing Balance Sheet and the Buyer's calculation of Actual
Working Capital shall be conclusive and binding on the Sellers unless the
Seller Representative shall notify the Buyer in writing within 10 days after
receipt thereof that, in the opinion of the Seller Representative, (i) the
Closing Balance Sheet has not been prepared on a basis consistent with the
accounting principles set forth in Exhibit 2.3 or (ii) the Actual Working
Capital has not been calculated correctly. Such notice (the "Dispute Notice")
- -------------- shall set forth in reasonable detail, each item and amount with
which the Seller disagrees and the basis for each such disagreement. The Buyer
and the Seller Representative shall attempt to resolve each such disagreement
and shall set forth any resolution in writing. If they cannot so agree within
30 days after the delivery by the Seller Representative to the Buyer of the
Dispute Notice, then either the Seller Representative or the Buyer may submit
the dispute regarding the items and/or amounts identified by the Seller
Representative to a nationally recognized firm of certified public accountants
acceptable to both the Buyer and the Seller Representative (the "Independent
Accountant"). The fees and expenses of the Independent Accountant shall be
shared equally by the Sellers, on the one hand, and the Buyer, on the other
hand, and the decision of the Independent Accountant shall be final and binding
on the Parties.

          (i) If the Target Working Capital exceeds the Actual Working Capital,
     an amount equal to such excess shall be released from the Escrow Account
     to the Buyer which amount shall be considered a purchase price adjustment
     for all purposes. If the Actual Working Capital exceeds the Target Working
     Capital, no payment shall be made by any Party or from the Escrow Funds.

     2.4. Purchase Price Adjustment. If the SBI EBITDA for the calendar year
ending December 31, 2000 equals or exceeds $5.75 million, then the Buyer shall
pay to each Seller such Seller's Pro Rata Share of $2,000,000 not later than
five business days following release of the Buyer's audited financial
statements for such calendar year, in accordance with the written instructions
of each such Seller given to the Buyer at least two business days prior to such
payment.

                                      11
<PAGE>


     2.5. The Closing. The closing of the transactions contemplated by this
Agreement (the "Closing") shall take place at the offices of Ropes & Gray in
New York, New York, or in such other manner and at such other place as the
Buyer and the Seller Representative shall agree, commencing at 10:00 a.m.
eastern time on September 24, 1999 or on such later date as the conditions
precedent set forth in Section 6 shall have been satisfied or waived (the
"Closing Date").

     2.6. Deliveries at the Closing. At the Closing, (a) the Sellers will
deliver to the Buyer (i) certificates evidencing the Shares duly endorsed (or
accompanied by duly executed blank stock powers), and otherwise in proper form
for transfer to the Buyer and (ii) the various certificates, instruments and
documents referred to in Section 6.1 below, and (b) the Buyer will deliver the
consideration specified as set forth in Section 2.2 above.

3. Representations and Warranties Regarding the Company. Each of the Seller
Employees jointly and severally represents and warrants to the Buyer that the
statements contained in this Section 3 are correct and complete as of the date
of this Agreement and will be correct and complete as of the Closing Date (as
though made then) as though the Closing Date were substituted for the date of
this Agreement throughout this Section 3 (unless a date is specified in a
particular representation and warranty), except as specifically qualified in
the disclosure schedule accompanying this Agreement (the "Disclosure
Schedule"). For purposes of this Section 3, the term "Company" shall be deemed
to be a reference to the Company and its Subsidiaries, from time to time. The
Disclosure Schedule will be arranged in paragraphs corresponding to the
lettered and numbered paragraphs contained in this Section 3.

     3.1. Organization of the Company. SBI is a Nevada corporation, duly
organized, validly existing and in good standing under the laws of Nevada.
Copies of the articles of incorporation and by-laws of SBI as amended to date
have been heretofore delivered to Buyer and are accurate and complete. SBI is
qualified to do business and is in good standing as a foreign corporation in
each jurisdiction listed in Section 3.1 of the Disclosure Schedule, which such
jurisdictions are the only jurisdictions where the nature of the activities
conducted by it or the character of the property owned, leased or operated by
it make such qualification necessary or appropriate, except for those
jurisdictions where the failure to be so qualified will not have a Material
Adverse Effect.

     3.2. Capitalization and Ownership of the Company. The authorized capital
stock of SBI consists of 90,000,000 shares of common stock, $0.001 par value
per share (the "Common Stock"), and 10,000,000 shares of preferred stock of
which 350,000 shares, $0.001 par value, are designated as Series A Preferred
(the "Series A Preferred Stock"). As of the date hereof, the only shares of
capital stock that are issued are (a) 4,990,281 shares of Common Stock, of
which 2,227,581 shares are outstanding and 2,762,700 shares are held as
treasury stock and (b) 337,403 shares of Series A Preferred Stock, all of which
are outstanding. All of the outstanding shares of capital stock of SBI have
been validly issued, are fully paid and nonassessable. Except as set forth in
Section 3.2 to the Disclosure Schedule,

                                      12
<PAGE>


there are no (i) written or oral agreements or understandings restricting the
transfer of, or affecting the rights of any holder of, the Shares or any other
shares of SBI's capital stock, (ii) written or oral obligations in the nature
of preemptive rights on the part of any holder of any class of securities of
SBI or (iii) outstanding options, warrants, rights, or other written or oral
agreements, understandings or commitments of any kind obligating SBI,
contingently or otherwise, to issue or sell any shares of its capital stock or
any securities or obligations convertible into, or exchangeable for, any shares
of its capital stock, and no authorization therefor has been given. Section 3.2
of the Disclosure Schedule sets forth the names of the record holders of all
outstanding options, warrants or other rights to purchase, sell or otherwise
dispose of, or rights to exchange or convert into, any shares of SBI's capital
stock (whether written or oral) and the number of shares, exercise prices and
expiration dates of such options, warrants or other rights. As of the Closing,
all of SBI's outstanding options, warrants and other rights shall have been
exercised or otherwise exchanged for shares of Common Stock (which shares, when
issued, will be validly issued, fully paid and nonassessable) or terminated.
There are no stock appreciation, phantom stock, profit participation, or
similar rights with respect to SBI. None of the outstanding shares of capital
stock of the Company were issued in violation of the Securities Act or the
securities or blue sky laws of any state or jurisdiction.

     3.3. Authorization of Transaction. SBI has the legal capacity, power and
authority (including full corporate power and authority) to execute and deliver
this Agreement and to perform its obligations hereunder. The board of directors
of SBI has duly authorized the execution, delivery and performance of this
Agreement. All corporate and other actions or proceedings to be taken by or on
the part of SBI to authorize and permit the execution and delivery by it of
this Agreement and the instruments required to be executed and delivered by it
pursuant hereto, its performance of its obligations hereunder and thereunder,
and the consummation by it of the transactions contemplated herein, have been
duly and properly taken. This Agreement has been duly executed and delivered by
SBI and constitutes the legal, valid and binding obligation of SBI, enforceable
in accordance with its terms and conditions.

     3.4. Noncontravention. None of the execution, delivery or performance of
this Agreement (or any of the Closing Agreements to which it is a party), or
the consummation of the sale of the Shares and the other transactions
contemplated hereby and thereby, will (a) violate any constitution, statute,
regulation, rule, injunction, judgment, order, decree, ruling, charge, or other
restriction of any government, governmental agency, or court to which the
Company or any of its properties or assets are subject or any provision of the
charter or by-laws (or similar constitutional documents) of the Company, (b)
result in any conflict with, breach of, or default (or give rise to any Lien or
a right to termination, cancellation or acceleration or loss of any right or
benefit) under, or require any consent or approval which has not been, or prior
to Closing will not be, obtained or waived with respect to, any contract,
agreement, lease, Permit, instrument or other arrangement to which the Company
is a party or by which it or its properties or assets is subject or bound, or
constitute an event which, with notice, lapse of time or both, would result in
any such breach, default,


                                       13
<PAGE>


termination, cancellation, acceleration or loss of right or benefit. The
Company need not give any notice to, make any filing with, or obtain any
authorization, consent, or approval of any government or governmental agency in
order for the Parties to consummate the transactions contemplated by this
Agreement except for the required filings under the Hart-Scott-Rodino Act,
which filings have been made.

     3.5. Brokers' Fees. Neither the Company nor any Seller has any Liability
or obligation to pay any fees or commissions to any broker, finder, or agent
with respect to the transactions contemplated by this Agreement for which the
Buyer or the Company is or could become liable or obligated.

     3.6. Title to Assets. The Company has good and marketable title to, or a
valid and subsisting leasehold interest in, the properties and assets used by
it, located on its premises, or reflected on the Most Recent Balance Sheet or
acquired after the date thereof, free and clear of all Liens (other than those
Liens set forth on Section 3.6 of the Disclosure Schedule), except for
properties and assets disposed of in the Ordinary Course of Business since the
Most Recent Fiscal Year End.

     3.7. Subsidiaries. Section 3.7(a) of the Disclosure Schedule sets forth
with respect to each of SBI's Subsidiaries: (a) its name and jurisdiction of
incorporation, (b) the number of shares of authorized capital stock of each
class of its capital stock, (c) the number of issued and outstanding shares of
each class of its capital stock, the names of the record holders thereof and
the number of shares held by each such holder, (d) the number of shares of its
capital stock held in treasury and (e) its directors and officers. Each such
Subsidiary is a corporation duly organized, validly existing and in good
standing under the laws of the jurisdiction of its incorporation. Each such
Subsidiary is duly authorized to conduct business and is in good standing as a
foreign corporation in each jurisdiction listed opposite its name in Section
3.7(a) of the Disclosure Schedule, which jurisdictions are the only
jurisdictions where the nature of the activities conducted by it or the
character of the property owned, leased or operated by it make such
qualification necessary or appropriate, except for those jurisdictions where
the failure to be so qualified will not have a Material Adverse Effect. Each
such Subsidiary has full corporate power and authority and all Permits and
authorizations necessary to carry on the businesses in which it is engaged and
in which it presently proposes to engage and to own and use the properties
owned and used by it. SBI has delivered to the Buyer correct and complete
copies of the charter and by-laws of each Subsidiary (each as amended to date).
All of the issued and outstanding shares of capital stock of each such
Subsidiary have been duly authorized and are validly issued, fully paid and
nonassessable. SBI owns beneficially all of the outstanding shares of each of
its Subsidiary that it holds of record, free and clear of any Taxes, Liens
(other than those Liens set forth on Section 3.7(b) of the Disclosure
Schedule), options, warrants, purchase rights, contracts and commitments. There
are no outstanding or authorized options, warrants, purchase rights,
subscription rights, conversion rights, exchange rights, or other contracts or
commitments that could require any of SBI or any of its Subsidiaries to sell,
transfer, or otherwise dispose of any capital stock of


any of its Subsidiaries or that could require any such Subsidiary to issue,
sell, or otherwise cause to become outstanding any of its own capital stock.
There are no outstanding stock appreciation, phantom stock, profit
participation, or similar rights with respect to any such Subsidiary. There are
no voting trusts, proxies, or other agreements or understandings with respect
to the voting of any capital stock of any such Subsidiary. None of such
Subsidiaries is in default under or in violation of any provision of its
charter or by-laws. None of SBI or any of its Subsidiaries controls directly or
indirectly or has any direct or indirect equity participation or ownership
interest in any corporation, partnership, trust, or entity which is not a
Subsidiary of SBI.

     3.8. Financial Statements. Attached hereto as Exhibit 3.8 are the
following financial statements (collectively, the "Financial Statements"): (i)
the audited balance sheet and statement of income, change in stockholders'
equity and cash flow as of and for the fiscal year ended December 31, 1998 (the
"Most Recent Fiscal Year End") for SBI, (ii) unaudited balance sheets and
statements of income, changes in stockholders' equity and cash flow as of and
for the fiscal years ended December 31, 1996 and December 31, 1997 for SBI,
(iii) unaudited balance sheets and statements of income, changes in
stockholders' equity and cash flow as of and for the fiscal years ended
December 31, 1996, December 31, 1997 and December 31, 1998 for HTI
Bio-Services, Inc. and (iv) unaudited consolidated balance sheets and
statements of income, changes in stockholders' equity and cash flows for the
seven months ended July 31, 1999 for SBI. The Financial Statements (including,
with respect to the audited financial statements only, the notes thereto) have
been prepared in accordance with GAAP applied on a consistent basis throughout
the periods covered thereby, are correct and complete and present fairly the
consolidated financial condition of the Company as of such dates and the
consolidated results of operations of the Company for such periods and are
consistent with the books and records of the Company, subject, in the case of
the financial statements delivered pursuant to clause (iv) above, to normal and
recurring year end adjustments and the absence of notes.

     3.9. Absence of Certain Changes and Events. Since the Most Recent Fiscal
Year End and except as disclosed in Section 3.9 of the Disclosure Schedule, the
Company has conducted its businesses only in the Ordinary Course of Business
and, without limiting the generality of the foregoing, there has not been, with
respect to the Company:

          (a) any sale, lease, transfer, or assignment of any of the Company's
     assets, tangible or intangible, other than sales of inventory for a fair
     consideration in the Ordinary Course of Business;

          (b) any agreement, contract, lease, or license (or series of related
     agreements, contracts, leases and licenses) entered into other than (i) in
     the Ordinary Course of Business and (ii) in an amount not in excess of
     $50,000;

                                      15
<PAGE>


          (c) any acceleration, termination, modification, or cancellation of
     any agreement, contract, lease, or license (or series of related
     agreements, contracts, leases and licenses) to which the Company is a
     party or by which it is bound;

          (d) any Lien created or imposed upon the Company's assets, tangible
     or intangible;

          (e) any capital expenditure made (or series of related capital
     expenditures) involving more than $10,000 singly or $50,000 in the
     aggregate;

          (f) any capital investment made in, any loan to, or any acquisition
     of the securities or assets of, any other Person (or series of related
     capital investments, loans and acquisitions);

          (g) any issuance of any note, bond, or other debt security or the
     creation, incurrence, assumption or guarantee of any indebtedness for
     borrowed money or capitalized lease obligation;

          (h) any delay or postponement of the payment of accounts payable and
     other Liabilities outside the Ordinary Course of Business;

          (i) any cancellation, compromise, waiver, or release any right or
     claim or Indebtedness (or series of related rights and claims);

          (j) any grant of a license or sublicense of any rights or
     modification of any rights under or with respect to, or any settlement
     entered into regarding any infringement of its rights to, any Intellectual
     Property;

          (k) any issuance, sale, or other disposition of any of its capital
     stock, or grant of any options, warrants, or other rights to purchase or
     obtain (including upon conversion, exchange, or exercise) any capital
     stock, other than upon the exercise of options outstanding on the date
     hereof;

          (l) any dividend or distribution (whether in cash or in kind) or
     repurchase, redemption or retirement of any of its capital stock other
     than a dividend or distribution of up to 150,000 shares of common stock of
     Hybridon, Inc. held by the Company on the date hereof (or the proceeds
     thereof);

          (m) any material damage, destruction, or loss (whether or not covered
     by insurance) to its property;

          (n) any loan to, or any other transaction with, any Affiliate of the
     Company;

                                      16
<PAGE>


          (o) any employment contract or collective bargaining agreement,
     written or oral, entered into or any modification or change of the terms
     of any existing such contract or agreement;

          (p) any increase, modification or change in the compensation of any
     of the officers or employees of the Company;

          (q) any adoption, amendment, modification or termination of any
     Employee Benefit Plan for the benefit of any director, officer, or
     employee of the Company (or taken any such action with respect to any
     other Employee Benefit Plan);

          (r) any payment pursuant to any Employee Benefit Plan or other plan,
     contract or commitment for the benefit of any of the directors, officers
     and employees of the Company;

          (s) any pledge to make or making of any charitable or other capital
     contribution;

          (t) any payment of any amount to any third party with respect to any
     Liability (excluding any costs and expenses incurred or which may be
     incurred in connection with this Agreement and the transactions
     contemplated hereby) other than in the Ordinary Course of Business;

          (u) any modification in its methods of accounting or accounting
     practices (including, without limitation, practices regarding recognition
     of revenue) or the application of GAAP from the manner in which it was
     applied in the Most Recent Financial Statements;

          (v) any other occurrence, event, incident, action, failure to act, or
     transaction outside the Ordinary Course of Business involving the Company
     or any of its Subsidiaries; or

          (w) any commitment by the Company or the Sellers to any of the
     foregoing.

     3.10. Absence of Undisclosed Liabilities. The Company has no Liabilities,
except for (a) Liabilities set forth on the face of the Most Recent Balance
Sheet (rather than in any notes thereto), (b) Liabilities which have arisen
after the Most Recent Fiscal Year End in the Ordinary Course of Business and
(c) Liabilities incurred in the Ordinary Course of Business and are not
required under GAAP to be reflected in the Most Recent Financial Statements.

     3.11. Legal and Other Compliance.

     (a) Each of the Company and its predecessors conduct, and have conducted,
their businesses in compliance with all applicable Laws, except to the extent
non-compliance therewith would not have a Material Adverse Effect, and no
action, suit, proceeding, hearing, investigation, charge, complaint, claim,
demand, or notice has been filed or commenced against any of them alleging any
failure so to comply. There is no judgment, injunction, order or decree or
material agreement binding upon the Company which has or reasonably could be
expected to have the effect of prohibiting or materially impairing any current
or future business practice of the Company, any acquisition of property by the
Company or the conduct of business by the Company, as currently conducted or as
proposed to be conducted. Except as set forth on Section 3.11(a) of the
Disclosure Schedule, the Company holds all permits, licenses, easements,
variances, exemptions, consents, certificates, orders and approvals from
governmental authorities (collectively, the "Permits") which are necessary for
the lawful operation of its business (including, without limitation, all
Permits from the Centers for Disease Control, the United States Department of
Agriculture and the Association for Assessment and Accreditation of Laboratory
Animal Care relating to the importation of primates into the United States)
(collectively, the "Company Permits") and such Company Permits are in full
force and effect. The Company is in compliance with the terms of the Company
Permits, except where the failure so to comply would not have a Material
Adverse Effect, and the Company has not received any notice of violation of any
Company Permits.

     (b) Without limiting the generality of the foregoing clause (a), (i) the
Company is in compliance with Good Laboratory Practices in respect of the
operations of the Company to which such Practices, by their terms, apply and
(ii) the Company has established an Internal Animal Care Use Committee which
committee is performing its responsibilities as set forth under applicable laws
and regulations.

     3.12. No Material Adverse Change. Since the Most Recent Fiscal Year End,
there has not been any change which has resulted in a Material Adverse Effect
and no event has occurred or circumstance exists that may result in a Material
Adverse Effect.

     3.13. Taxes.

     (a) The Company has filed on a timely basis all Tax Returns required to be
filed by it as of the date hereof. All such Tax Returns were correct and
complete in all respects. The Company has no Liability for Taxes (whether or
not shown on any Tax Return) in respect of any period or portion thereof ending
on or prior to the Closing Date. The Company has not nor is currently the
beneficiary of any extension of time within which to file any Tax Return. No
claim has been made against the Company by an authority in a jurisdiction where
the Company does not file Tax Returns that the

                                      18
<PAGE>


Company may be subject to taxation by that jurisdiction. There are no liens or
other encumbrances on any of the assets of the Company that arose in connection
with any failure (or alleged failure) to pay any Tax.

     (b) The Company has withheld and paid all Taxes required to have been
withheld in connection with amounts paid or owing to any employee, independent
contractor, creditor, stockholder, or other third party.

     (c) There is no Basis for any authority to assess any additional Taxes for
any period for which a Tax Return has been filed. There is no dispute, audit,
investigation, proceeding or claim concerning any Liability with respect to
Taxes of the Company either (i) claimed or raised by any authority in writing
or (ii) as to which the Company or any Seller has knowledge based upon contact
with any such authority. Except as set forth in Section 3.13(c) of the
Disclosure Schedule, all federal, state, local and foreign income Tax Returns
filed with respect to the Company have been audited or are not currently open
because the applicable statute of limitations has expired. The Sellers have
delivered to the Buyer correct and complete copies of all federal income Tax
Returns, examination reports and statements of deficiencies assessed against or
agreed to by the Company for the last three taxable years. No power of attorney
for Taxes of the Company is currently in force.

     (d) The Company has not waived any statute of limitations in respect of
Taxes or agreed to any extension of time with respect to a Tax assessment or
deficiency.

     (e) The Company (i) is not nor has it been a party to any Tax allocation
or sharing agreement, or (ii) does not have any Liability for the Taxes of any
Person other than the Company and its Subsidiaries under Treas. Reg. Section
1.1502-6 (or any similar provision of state, local or foreign law), as a
transferee or successor, by contract, or otherwise. The Company has not been a
member of an Affiliated Group filing a consolidated federal income Tax Return
(other than a group the common parent of which was the Company). The Company
has not agreed by contract nor is it obligated as a transferee or successor as
to how any item was or will be reported on a Tax Return.

     (f) The Company has not filed a consent under Section 341(f) of the Code
concerning collapsible corporations. The Company has not made any payments, is
not obligated to make any payments, nor is a party to any Agreement that under
certain circumstances could obligate it to make any payments that will not be
deductible under Sections 162, 280G or 404 of the Code. The Company has not
been a United States real property holding corporation within the meaning of
Section 897(c)(2) of the Code during the applicable period specified in Section
897(c)(1)(A)(ii) of the Code. The Company has disclosed on its federal income
Tax Returns all positions taken therein that could give

                                      19
<PAGE>


rise to a substantial understatement of federal income Tax within the meaning
of the Section 6662 of the Code.

     (g) Section 3.13(g) of the Disclosure Schedule sets forth the following
information with respect to SBI and its Subsidiaries as of the most recent
practicable date, (i) the basis of SBI or such Subsidiary in its assets; (ii)
the amount of any net operating loss, net capital loss, unused investment or
other credit, unused foreign tax, or excess charitable contribution of SBI or
such Subsidiary; and (iii) the amount of any deferred gain or loss allocable to
SBI or such Subsidiary arising out of any Deferred Intercompany Transaction.

     (h) The unpaid Taxes of the Company did not, as of the Most Recent Fiscal
Year End, exceed the reserve for Tax Liability (rather than any reserve for
deferred Taxes established to reflect timing differences between book and Tax
income) set forth on the face of the Most Recent Balance Sheet (rather than in
any notes thereto), and as of the date hereof do not exceed such reserve as
adjusted for the operations of the Company in the Ordinary Course of Business
since the date of the Most Recent Balance Sheet.

     3.14. Property, Plant and Equipment.

     (a) The Company does not own, nor has it or its predecessors ever owned,
any real property. (b) Section 3.14(b) of the Disclosure Schedule lists all
real property leased or subleased to the Company. The Company has delivered to
the Buyer correct and complete copies of the leases and subleases listed in
Section 3.14(b) of the Disclosure Schedule (as amended to date) which such
leases and subleases have not been amended or modified since the date thereof.
With respect to each lease and sublease listed in Section 3.14(b) of the
Disclosure Schedule:

          (i) the lease or sublease is legal, valid, binding, enforceable and
     in full force and effect;

          (ii) the lease or sublease will continue to be legal, valid, binding,
     enforceable and in full force and effect on identical terms following the
     consummation of the transactions contemplated hereby;

          (iii) neither any of the Sellers, the Company nor to their knowledge
     any other party to the lease or sublease, is in breach or default, and no
     event has occurred which, with notice or lapse of time, would constitute a
     breach or default or permit termination, modification, or acceleration
     thereunder;

                                      20
<PAGE>


          (iv) neither any of the Sellers, the Company nor to their knowledge
     any other party to the lease or sublease, has repudiated any provision
     thereof;

          (v) there are no disputes, oral or written agreements, or forbearance
     programs in effect as to the lease or sublease;

          (vi) with respect to each sublease, the representations and
     warranties set forth in subsections (i) through (v) above are true and
     correct with respect to the underlying lease;

          (vii) the Company has not assigned, transferred, conveyed, mortgaged,
     deeded in trust, or encumbered any interest in the leasehold or
     subleasehold;

          (viii) All facilities leased or subleased thereunder have received
     all approvals of governmental authorities (including licenses and permits)
     required in connection with the operation thereof and have been operated
     and maintained in accordance with applicable laws, rules and regulations;
     and

          (ix) all facilities leased or subleased thereunder are supplied with
     utilities and other services necessary for the operation of said
     facilities.

     (c) All of the tangible personal property of the Company other than
inventory is in good working order, operating condition and state of repair,
ordinary wear and tear excepted. Section 3.14(c) of the Disclosure Schedule
lists each lease or other agreement or understanding (including all amendments)
under which any tangible personal property other than inventory having a cost
or aggregate capital lease obligations in excess of $10,000 is held or used
(indicating for each lease (i) a description of the property leased thereunder,
including location, (ii) the term thereof and a description of any available
renewal periods, (iii) the rental and other material payment terms, (iv) the
owner of the property subject to such equipment lease and (v) whether any
consents are required under such lease in connection with the transactions
contemplated by this Agreement). The Company has delivered to the Buyer true
and complete copies of each equipment lease and any and all other material
contractual obligations relating to any of the equipment leases, in each case
as in effect on the date hereof and as it will be in effect at the Closing,
including, without limitation, all amendments.

     (d) The Company owns or leases all buildings, real property, improvements,
machinery, equipment and other tangible assets necessary for the conduct of its
businesses as currently conducted and as proposed to be conducted. Each such
tangible asset is free from defects (patent and latent), has been maintained in
accordance with normal industry practice, is in good operating condition and
repair (subject to normal

21 wear and tear) and is suitable, adequate and sufficient for the purposes for
which it presently is used and presently is proposed to be used.

     3.15. Intellectual Property.

     (a) The Company owns or has the right to use pursuant to license,
sublicense, agreement, or permission all Intellectual Property necessary or
desirable for the operation of the businesses of the Company as currently
conducted and as proposed to be conducted. Each item of Intellectual Property
owned or used by the Company in its businesses immediately prior to the Closing
hereunder will be owned or available for use by the Company and the Buyer on
identical terms and conditions subsequent to the Closing hereunder. Except as
disclosed in Section 3.15(a) of the Disclosure Schedule, the Company has taken
all necessary and desirable action to maintain and protect each item of
Intellectual Property that the Company owns or uses.

     (b) Except as disclosed in Section 3.15(b) of the Disclosure Schedule, the
Company has not interfered with, infringed upon, misappropriated, or otherwise
come into conflict with any Intellectual Property rights of third parties, and
there has never been any charge, complaint, claim, demand, or notice alleging
any such interference, infringement, misappropriation, or violation (including
any claim that the Company must license or refrain from using any Intellectual
Property rights of any third party). To the knowledge of the Company or any
Seller, no third party has interfered with, infringed upon, misappropriated, or
otherwise come into conflict with any Intellectual Property rights of the
Company.

     (c) Section 3.15(c) of the Disclosure Schedule identifies each patent or
registration which has been issued to the Company with respect to the Company's
Intellectual Property, identifies each pending patent application or
application for registration which has been made with respect to the Company's
Intellectual Property, and identifies each license, agreement, or other
permission which the Company has granted to any third party with respect to any
of the Intellectual Property (together with any exceptions). The Sellers have
delivered to the Buyer correct and complete copies of all such patents,
registrations, applications, licenses, agreements and permissions (as amended
to date) and have made available to the Buyer correct and complete copies of
all other written documentation evidencing ownership and prosecution (if
applicable) of each such item. Section 3.15(c) of the Disclosure Schedule also
identifies each trade name or unregistered trademark or servicemark used by the
Company. With respect to each item of Intellectual Property required to be
identified in Section 3.15(c) of the Disclosure Schedule:

          (i) except as disclosed in Section 3.15(c) of the Disclosure
     Schedule, the Company possesses all right, title and interest in and to
     the item, free and clear of any Lien, license, or other restriction;

                                      22
<PAGE>


          (ii) the item is not subject to any outstanding injunction, judgment,
     order, decree, ruling, or charge;


          (iii) no action, suit, proceeding, hearing, investigation, charge,
     complaint, claim, or demand is pending or, to the knowledge of the Company
     or any Seller, is threatened, which challenges the legality, validity,
     enforceability, use, or ownership of the item; and

          (iv) the Company has not agreed to indemnify any Person for or
     against any interference, infringement, misappropriation, or other
     conflict with respect to the item.

     (d) Section 3.15(d) of the Disclosure Schedule identifies each item of
material Intellectual Property that any Person other than the Company owns and
that the Company uses pursuant to license, sublicense, agreement, or
permission. The Sellers have delivered to the Buyer correct and complete copies
of all such licenses, sublicenses, agreements and permissions (as amended to
date). With respect to each item of Intellectual Property required to be
identified in Section 3.15(d) of the Disclosure Schedule:

          (i) the license, sublicense, agreement, or permission covering the
     item is legal, valid, binding, enforceable and in full force and effect;

          (ii) the license, sublicense, agreement, or permission will continue
     to be legal, valid, binding, enforceable and in full force and effect on
     identical terms following the consummation of the transactions
     contemplated hereby;

          (iii) neither the Company nor, to the knowledge of the Company or any
     Seller, no other party to the license, sublicense, agreement, or
     permission is in breach or default, and no event has occurred which with
     notice or lapse of time would constitute a breach or default or permit
     termination, modification, or acceleration thereunder;

          (iv) neither the Company, nor to the knowledge of the Company or any
     Seller, no other party to the license, sublicense, agreement, or
     permission has repudiated any provision thereof;

          (v) with respect to each sublicense, the representation and
     warranties set forth in subsections (i) through (iv) above are true and
     correct with respect to the underlying license;

                                      23
<PAGE>


          (vi) the underlying item of Intellectual Property is not subject to
     any outstanding injunction, judgment, order, decree, ruling, or charge;

          (vii) no action, suit, proceeding, hearing, investigation, charge,
     complaint, claim, or demand is pending or, to the knowledge of the Company
     or any Seller, is threatened, which challenges the legality, validity, or
     enforceability of the underlying item of Intellectual Property; and

          (viii) the Company has not granted any sublicense or similar right
     with respect to the license, sublicense, agreement, or permission.

     (e) To the knowledge of the Company or any Seller, the Company will not
interfere with, infringe upon, misappropriate, or otherwise come into conflict
with, any Intellectual Property rights of third parties as a result of the
continued operation of its businesses as presently conducted or proposed to be
conducted.

     (f) Neither the Company nor any Seller has any knowledge of any new (i)
products, (ii) services, (iii) procedures, (iv) methods of manufacturing,
processing or delivery or (v) inventions that any competitors or other third
parties have developed which reasonably could be expected to supersede or make
obsolete any Product or Service, procedure or method of manufacturing
processing or delivery of the Company.

     3.16. Inventories. The inventory of the Company is suitable and usable for
its intended purpose in the Ordinary Course of Business, and none of such
inventory is below standard quality, damaged, or defective, subject only to the
reserve for inventory writedown set forth on the face of the Most Recent
Balance Sheet (rather than in any notes thereto) as adjusted for the passage of
time through the Closing Date in accordance with GAAP and the past custom and
practice of the Company. Since the Most Recent Balance Sheet Date, no inventory
has been sold or disposed of except through sales in the Ordinary Course of
Business.

     3.17. Contracts. Section 3.17 of the Disclosure Schedule lists the
following contracts and other agreements and understandings (whether written or
oral) to which the Company is a party:

          (a) any agreement (or group of related agreements) for the lease of
     personal property to or from any Person providing for lease payments in
     excess of $50,000;

          (b) any agreement (or group of related agreements) for the purchase
     or sale of raw materials, commodities, supplies, products, or other
     personal property, or for the furnishing or receipt of services, the
     performance of which will extend over a period of more than one year,
     result in a loss to the Company, or involve consideration, in excess of
     $50,000;

                                      24
<PAGE>


          (c) any agreement concerning a partnership or joint venture;

          (d) any agreement (or group of related agreements) under which it has
     created, incurred, assumed, or guaranteed any Indebtedness in excess of
     $10,000 or under which it has imposed a Lien on any of its assets,
     tangible or intangible;

          (e) any agreement concerning confidentiality or noncompetition;

          (f) any agreement relating to the Company, its assets, liabilities
     and business, or relating to the Shares, in each case, between or among
     the Company, any Seller and any or their respective Affiliates;

          (g) any profit sharing, stock option, stock purchase, stock
     appreciation, deferred compensation, severance, or other similar plan or
     arrangement;

          (h) any collective bargaining agreement;

          (i) any agreement providing for the employment or consultancy with
     any individual on a full-time, part-time, consulting or other basis in
     excess of $50,000 or providing severance or retirement benefits;

          (j) any agreement under which it has advanced or loaned any amount to
     any of its stockholders, Affiliates, directors, officers, or employees
     other than in the Ordinary Course of Business;

          (k) any agreement under which the consequences of a default or
     termination could have an material adverse effect on the business,
     financial condition, operations, results of operations, or prospects of
     any of SBI or its Subsidiaries;

          (l) the standard terms and conditions of sale or lease for the
     Company's Products and Services (containing applicable guaranty, warranty
     and indemnity provisions); and

          (m) any other agreement (or group of related agreements) the
     performance of which involves consideration in excess of $50,000.

The Sellers have delivered to the Buyer a correct and complete copy of each
agreement listed in Section 3.17 of the Disclosure Schedule. Except as
disclosed in Section 3.17 of the Disclosure Schedule, with respect to each such
agreement: (i) the agreement is legal, valid, binding, enforceable and in full
force and effect; (ii) subject to the Buyer obtaining the necessary consents
disclosed in Section 3.29 of the Disclosure Schedule, the agreement will
continue to be legal, valid, binding, enforceable and in full force and effect
on identical terms following the consummation of the transactions contemplated
hereby; (iii) neither

                                      25
<PAGE>


the Company nor, to the knowledge of the Company or any Seller, any other party
is in breach or default, and no event has occurred which with notice or lapse
of time would constitute a breach or default, or permit termination,
modification, or acceleration, under the agreement; (iv) neither the Company
nor, to the knowledge of the Company or any Seller, any other party has
repudiated any provision of the agreement; and (v) none of such agreements is,
when considered singly or in the aggregate with others, unduly burdensome,
onerous or materially adverse to the Company's business, properties, assets,
earnings or prospects.


     3.18. Accounts Receivable. All accounts receivable of the Company are
reflected properly on its books and records in accordance with GAAP, are valid
receivables, arose from bona fide transactions in the Ordinary Course of
Business subject to no setoffs or counterclaims except as recorded as accounts
payable are current and to the knowledge of the Company, are collectible in
accordance with their terms at their recorded amounts, except as reflected as
net of allowance for bad debts on the face of the Most Recent Balance Sheet
(rather than in any notes thereto or reserve therefor) as adjusted for the
passage of time in accordance with GAAP and past practice and custom of the
Company and are subject to no refunds or other adjustments and to no defenses,
right of set off, assignments, restrictions, encumbrances or condition
enforceable by third parties on or affecting any of such accounts receivable.

     3.19. Insurance and Risk Management.

     (a) Section 3.19(a) of the Disclosure Schedule sets forth a complete list
of all material insurance policies (including policies providing property,
casualty, liability and workers' compensation coverage and bond and surety
arrangements) to which the business operations of the Company is a party, a
named insured, or is otherwise the beneficiary of coverage. All such policies
are with reputable insurance carriers, provide adequate coverage for all normal
risks incident to the Company's assets, properties and business operations and
are in character and amount at least equivalent to that carried by Persons
engaged in a business subject to the same or similar risks, perils or hazards.

     (b) Section 3.19(b) of the Disclosure Schedule sets forth the Company's
plan to provide Products and Services to its customers without material
interruption in the event (i) there is damage, destruction or loss to any of
its assets or properties (whether or not covered by insurance) or (ii) one or
more of its facilities becomes inaccessible to its officers and employees for
any reason whatsoever.

     (c) There have not been, and there are no pending, or, to the knowledge of
the Company or any Seller, threatened, actions or activities relating to animal
rights that could reasonably be expected to lead to an interruption in the
provision of Products and Services to the customers the Company. The Company
has established a (i) security program and (ii) an employee training program
which are reasonable under the circumstances to address possible actions or
activities relating to animal rights.

                                      26
<PAGE>


     3.20. Litigation. Except as disclosed in Section 3.20 of the Disclosure
Schedule, there are no judicial or administrative actions, claims, suits,
proceedings or investigations pending or, to the knowledge of the Company or
any Seller, threatened, that would be reasonably likely to result in a Material
Adverse Effect, or that question the validity of this Agreement or of any
action taken or to be taken pursuant to or in connection with the provisions of
this Agreement or that relate to the purchase or sale of shares of capital
stock of the Company nor, to the knowledge of the Company or any Seller, is
there any Basis for any such action, claim, suit, proceeding or investigation.
There are no judgments, orders, decrees, citations, fines or penalties
heretofore assessed against the Company affecting adversely any of its assets,
businesses or operations under any federal, state or local law.

     3.21. Product Warranties; Defects; Liability. Each Product and Service
delivered, provided, manufactured, sold or leased by the Company and its
predecessors is, and has been, in conformity with all applicable federal,
state, local or foreign laws and regulations, contractual commitments and all
express and implied warranties, and the Company has no Liability (and there is
no Basis for any present or future action, suit, proceeding, hearing,
investigation, charge, complaint, claim, or demand giving rise to any
Liability) for damages, replacement or repair thereof in connection therewith,
subject only to the reserve for product warranty claims set forth on the face
of the Most Recent Balance Sheet (rather than in any notes thereto) which such
reserve is adequate to address all such Liabilities. Except as disclosed in
Section 3.21 of the Disclosure Schedule, no Product or Service delivered,
provided, manufactured, sold or leased by the Company is subject to any
guaranty, warranty, or other indemnity beyond the standard terms and conditions
of sale or lease set forth in Section 3.17(l) of the Disclosure Schedule. The
Company has no Liability (and there is no Basis for any present or future
action, suit, proceeding, hearing, investigation, charge, complaint, claim, or
demand against any of them giving rise to any Liability) whether arising out of
any injury to individuals or property or otherwise as a result of the
ownership, possession, or use of any Product or Service delivered, provided,
manufactured, sold or leased by the Company or any of its predecessors and
there has been no inquiry or investigation made in respect thereof by any
Person including any governmental or administrative agency.

     3.22. Employees. To the knowledge of the Company or any Seller, no
executive, key employee, or group of employees has any plans to terminate
employment with the Company or its Subsidiaries. The Company has not
experienced any labor disputes or work stoppage due to labor disagreements. The
Company is in compliance with all applicable laws respecting employment and
employment practices, terms and conditions of employment and wages and hours
and have not been and are not engaged in any unfair labor practice as defined
in the National Labor Relations Act, as amended, the violation of which could
have a Material Adverse Effect. The Company is not a party to any agreement
with any employee, officer or director that provides for payments or
acceleration of benefits upon a change of control of the Company. The Company
is not a party to any collective bargaining agreements. Section 3.22 of the
Disclosure Schedule lists each agreement, understanding or policy regarding
confidentiality applicable to any director, officer, employee or agent of, or
consultant to, the

                                      27
<PAGE>


Company. The Company has no Liability in respect of compensation to employees
(other than any such compensation to be paid in accordance with the payroll
practices of the Company in the Ordinary Course of Business not later than 30
days following the Closing Date). 3.23. Employee Benefits.

     (a) Section 3.23 of the Disclosure Schedule lists each Employee Benefit
Plan that the Company maintains or to which the Company contributes relating to
current or former employees, officers or directors of the Company.

          (i) Each such Employee Benefit Plan (and each related trust,
     insurance contract, or fund) materially complies in form and in operation
     in all respects with the applicable requirements of ERISA, the Code and
     other applicable laws.

               (ii) All required reports and descriptions (including Form 5500
          Annual Reports, Summary Annual Reports, PBGC-l's and Summary Plan
          Descriptions) have been filed or distributed appropriately with
          respect to each such Employee Benefit Plan. The requirements of Part
          6 of Subtitle B of Title I of ERISA and of Section 4980B of the Code
          have been met with respect to each such Employee Benefit Plan which
          is an Employee Welfare Benefit Plan subject to such Part.

               (iii) All contributions (including all employer contributions
          and employee salary reduction contributions) which are due have been
          paid to each such Employee Benefit Plan which is an Employee Pension
          Benefit Plan and all contributions for any period ending on or before
          the Closing Date which are not yet due have been paid to each such
          Employee Pension Benefit Plan or accrued in accordance with the past
          custom and practice of the Company. All premiums or other payments
          for all periods ending on or before the Closing Date have been paid
          with respect to each such Employee Benefit Plan which is an Employee
          Welfare Benefit Plan.

               (iv) Each such Employee Benefit Plan which is an Employee
          Pension Benefit Plan intended to be qualified under Section 401(a) of
          the Code is so qualified.

               (v) The market value of assets under each such Employee Benefit
          Plan which is an Employee Pension Benefit Plan (other than any
          Multiemployer Plan) equals or exceeds the present value of all vested
          and nonvested Liabilities thereunder determined in accordance with
          PBGC methods, factors and assumptions applicable to an Employee
          Pension Benefit Plan terminating on the date for determination.

                                      28
<PAGE>


               (vi) The Sellers have delivered to the Buyer correct and
          complete copies of the plan documents and summary plan descriptions,
          the most recent determination letter received from the Internal
          Revenue Service, the most recent Form 5500 Annual Report, and all
          related trust agreements, insurance contracts and other funding
          agreements which implement each such Employee Benefit Plan.

     (b) With respect to each Employee Benefit Plan that the Company and the
Controlled Group of Corporations which includes the Company maintains or ever
has maintained or to which any of them contributes, ever has contributed, or
ever has been required to contribute:

               (i) Except as disclosed in Section 3.23(b)(i) of the Disclosure
          Schedule, no such Employee Benefit Plan which is an Employee Pension
          Benefit Plan (other than any Multiemployer Plan) has been completely
          or partially terminated or been the subject of a Reportable Event as
          to which notices would be required to be filed with the PBGC. No
          proceeding by the PBGC to terminate any such Employee Pension Benefit
          Plan (other than any Multiemployer Plan) has been instituted or
          threatened.

               (ii) There have been no Prohibited Transactions with respect to
          any such Employee Benefit Plan. No Fiduciary has any Liability for
          breach of fiduciary duty or any other failure to act or comply in
          connection with the administration or investment of the assets of any
          such Employee Benefit Plan. No action, suit, proceeding, hearing, or
          investigation with respect to the administration or the investment of
          the assets of any such Employee Benefit Plan (other than routine
          claims for benefits) is pending or threatened. None of the Sellers or
          the Company has any knowledge of any Basis for any such action, suit,
          proceeding, hearing, or investigation.

               (iii) The Company has not incurred, and none of the Sellers or
          the Company has any reason to expect that the Company will incur, any
          Liability to the PBGC (other than PBGC premium payments) or otherwise
          under Title IV of ERISA (including any withdrawal Liability) or under
          the Code with respect to any such Employee Benefit Plan which is an
          Employee Pension Benefit Plan.

     (c) None of the Company and the other members of the Controlled Group of
Corporations that includes the Company contributes to, ever has contributed to,
or ever has been required to contribute to any Multiemployer Plan or has any
Liability (including withdrawal Liability) under any Multiemployer Plan.

     (d) The Company does not maintain nor has it ever maintained or
contribute, ever has contributed, or ever has been required to contribute to
any

                                      29
<PAGE>


Employee Welfare Benefit Plan providing medical, health, or life insurance or
other welfare-type benefits for current or future retired or terminated
employees, their spouses, or their dependents (other than in accordance with
Section 4980B of the Code).

     (e) No promise or commitment to amend or improve any Employee Benefit Plan
for the benefit of current or former directors, officers, or employees of the
Company which is not reflected in the documentation provided to the Buyer has
been made.

     (f) The transactions contemplated by this Agreement shall not alone or
upon the occurrence of any additional or subsequent event, result in any
payment, of severance or otherwise, or acceleration, vesting or increase in
benefits under any Employee Benefit Plan for the benefit of any current or
former director, officer, or employee of the Company.

     3.24. Environment, Health and Safety.

     (a) Except as disclosed in Section 3.24 of the Disclosure Schedule:

               (i) the Company is and has been in compliance with all
          applicable Environmental Laws and Safety Laws;

               (ii) the Company has obtained, and is and has been in material
          compliance with the conditions of, all Environmental Permits required
          for the continued conduct of the business of the Company in the
          manner now conducted and presently proposed to be conducted;

               (iii) the Company has filed all required applications, notices
          and other documents necessary to effect the timely renewal or
          issuance of all Environmental Permits for the continued conduct of
          the business of the Company in the manner now conducted and presently
          proposed to be conducted;

               (iv) there are no past or present events, conditions or
          circumstances, including, without limitation, to the knowledge of the
          Company or any Seller, pending changes in any Environmental Law or
          Permit or Safety Laws, that are likely to materially interfere with
          or otherwise materially affect the business of the Company in the
          manner now conducted or which would materially interfere with
          compliance with any Environmental Law or Permit or Safety Law;

               (v) there are no circumstances or conditions present at or
          arising out of the present or former assets, properties, leaseholds,
          businesses or operations

                                      30
<PAGE>


          of the Company in respect of off-site storage, transportation or
          disposal of, or any off-site Release of, a Chemical Substance which
          reasonably may be expected to give rise to any Environmental
          Liabilities and costs;

               (vi) there are no circumstances or conditions present at or
          arising out of the present or former assets, properties, leaseholds,
          businesses or operations of the Company, including but not limited to
          any on-site Storage, use, disposal or Release of a Chemical
          Substance, which reasonably may be expected to give rise to any
          Environmental Liabilities and Costs or Safety Liability and Costs;

               (vii) none of the Company, the Sellers or the present or past
          assets, properties, businesses, leaseholds or operations of the
          Company has received or is subject to, or within the past three years
          has been subject to, any outstanding order, decree, judgment,
          complaint, agreement, claim, citation, or notice or is subject to any
          ongoing judicial or administrative proceeding indicating that the
          Company, the Sellers or the past and present assets of the Company
          are or may be: (A) in violation of any Environmental Law; (B) in
          violation of any Safety Laws; (C) responsible for the on-site or
          off-site storage or Release of any Chemical Substance; or, (D) liable
          for any Environmental Liabilities and Costs or Safety Liabilities and
          Costs;

               (viii) none of the Company or the Sellers have any reason to
          believe that the Company will become subject to a matter identified
          in subsection (vii); and, no investigation or review with respect to
          such matters is pending or, to the knowledge of the Company or any
          Seller, is threatened, nor has any Person indicated an intention to
          conduct the same;

               (ix) neither the business of the Company nor any of its
          properties or assets is subject to, or as a result of the
          transactions contemplated by this Agreement will be subject to, the
          requirements of any Environmental Laws which require notice,
          disclosure, cleanup or approval prior to transfer of the Shares or
          the business of the Company or which will impose Liens on any such
          asset or property or otherwise interfere with or affect the business
          of the Company;

               (x) Section 3.24(x) of the Disclosure Schedule lists all
          property presently or previously leased, owned or operated by the
          Company and identifies all such property (and the area within that
          property) that has been used by the Company and its Subsidiaries or
          by any other Person (including a prior owner or operator) for the
          storage or disposal of Chemical Substances;

               (xi) Section 3.24(xi) of the Disclosure Schedule lists all
          off-site locations, including, without limitation, commercial waste
          disposal facilities or municipal landfills, to which or at which
          Chemical Substances originating from

                                      31
<PAGE>


          the Company or its assets, properties or business have been sent (or
          otherwise have come to be located) in amounts that would require a
          waste manifest under the Resource Conservation and Recovery Act of
          1976 as now in effect for treatment, storage, disposal, reuse or
          recycling;

               (xii) Section 3.24(xii) of the Disclosure Schedule sets forth a
          list of all underground storage tanks owned or operated at any time
          by the Company and, except as disclosed in Section 3.24(xii) of the
          Disclosure Schedule, no such tank is leaking or has leaked at any
          time in the past, and there is no pollution or contamination of the
          Environment caused by or contributed to or threatened by a Release of
          a Chemical Substance from any such tank; and

               (xiii) Section 3.24(xiii) of the Disclosure Schedule lists all
          environmental audits, inspections, assessments, investigations or
          similar reports in the Company's possession or of which the Company
          is aware relating to the Company's assets, properties or business or
          the compliance of the same with applicable Environmental Laws and
          Safety Laws.

          (b) For purposes of this Section 3.24 only, all references to the
     "Company" are intended to include any and all other entities to which the
     Company may be considered a successor under applicable Environmental Laws.
     The representations and warranties in this Section are the only
     representations and warranties with respect to Environmental Laws or
     Environmental Liabilities and Costs, or Safety Laws or Safety Liabilities
     and Costs notwithstanding any other language in this Agreement of general
     applicability.

     3.25. Affiliated Transactions. Except as set forth in Section 3.25 of the
Disclosure Schedule, the Company is not a party to or bound by any contract,
commitment or understanding with any of the stockholders, directors or officers
of the Company or any of their respective Affiliates and none of the
stockholders, directors or officers of the Company or any of their respective
Affiliates owns or otherwise has any rights to or interests in any asset,
tangible or intangible, which is used in the business of any of the Company.

     3.26. Distributors, Customers, Suppliers.

     (a) Section 3.26(a) of the Disclosure Schedule sets forth a complete and
accurate list of (i) all of the distributors for the Company's Products and
Services indicating the specific product and/or service, existing contractual
arrangements, if any, with each such distributor and the volume of products
distributed, (ii) the ten largest customers (by dollar volume) of the Company
during the Most Recent Fiscal Year, indicating the existing contractual
arrangements with each such customer by Product and Service and (iii) all
suppliers of significant materials or services to the Company, indicating the
contractual arrangements for continued supply from such Persons.

                                      32
<PAGE>


          (b) Except as set forth in Section 3.26(b) of the Disclosure
     Schedule, since the Most Recent Fiscal Year End, (i) no significant
     customer (or group of customers which in the aggregate is significant) of
     the Company has given the Company notice or, to the knowledge of the
     Company or any Seller, has taken any other action which has given the
     Company or such Seller any reason to believe that such customer (or group
     of customers) will cease to purchase Products or Services or reduce
     significantly the amount of Products and Services purchased from the
     Company and (ii) no significant supplier or vendor (or group of suppliers
     or vendors which in the aggregate is significant) of the Company has given
     the Company notice or, to the knowledge of the Company or any Seller, has
     taken any other action which has given the Company or such Seller any
     reason to believe that such supplier or vendor (or group of suppliers or
     vendors) will cease to supply or restrict the amount supplied or adversely
     change its price or terms to the Company of any products or services of
     such supplier of vendor.

     3.27. No Illegal Payments, Etc. None of the Sellers or the Company nor any
of the directors, officers, employees or agents of the Company, has (a)
directly or indirectly given or agreed to give any illegal gift, contribution,
payment or similar benefit to any supplier, customer, governmental official or
employee or other person who was, is or may be in a position to help or hinder
the Company(or assist in connection with any actual or proposed transaction) or
made or agreed to make any illegal contribution, or reimbursed any illegal
political gift or contribution made by any other person, to any candidate for
federal, state, local or foreign public office (i) which might subject any of
the Company to any damage or penalty in any civil, criminal or governmental
litigation or proceeding or (ii) the non-continuation of which has had or might
have, individually or in the aggregate, a Material Adverse Effect or (b)
established or maintained any unrecorded fund or asset or made any false
entries on any books or records for any purpose.

     3.28. Books and Records. The minute books (containing the records of
meetings of stockholders, the board of directors and any committees of the
board of directors), the stock certificate books and the stock record books of
the Company are all correct and complete and have been maintained in accordance
with applicable sound business practices, laws and other requirements and
copies thereof have been made available to the Buyer.

     3.29. Consents. Section 3.29 of the Disclosure Schedule sets forth a true,
correct and complete list of any Person whose consent or approval is required
and the matter, agreement or contract to which such consent relates in
connection with the transactions contemplated by this Agreement.

     3.30. Disclosure. The representations and warranties contained in this
Section 3 (including the Disclosure Schedule and any other schedules and
exhibits required to be delivered by the Sellers to the Buyer pursuant to this
Agreement) and any certificate furnished or to be furnished by the Company or
the Sellers to the Buyer do not contain and will not

                                      33
<PAGE>


contain any untrue statement of a material fact or omit to state any material
fact necessary in order to make the statements and information contained in
this Section 3 not misleading.

3A. Representations and Warranties Regarding Sellers . Each of the Sellers, as
to itself, represents and warrants to the Buyer that the statements contained
in this Section 3A are correct and complete as of the date of this Agreement
and will be correct and complete as of the Closing Date (as though made then)
as though the Closing Date were substituted for the date of this Agreement
throughout this Section 3A (unless a date is specified in a particular
representation and warranty):

     3A.1. Title to Shares. Such Seller owns beneficially and of record all of
the outstanding shares of Common Stock as set forth on Exhibit 2.1, free and
clear of all Liens and each Seller has full right, power and authority to
transfer such Shares to Buyer free and clear of any Liens.

     3A.2. Authorization of Transaction. Such Seller has the legal capacity,
power and authority to execute and deliver this Agreement and to perform it's
respective obligations hereunder. All required actions or proceedings to be
taken by or on the part of such Seller to authorize and permit the execution
and delivery by it of this Agreement and the instruments required to be
executed and delivered by it pursuant hereto, it's performance of its
obligations hereunder and thereunder, and the consummation by it of the
transactions contemplated herein, have been duly and properly taken. This
Agreement has been duly executed and delivered by such Seller and constitutes
the legal, valid and binding obligation of such Seller, enforceable in
accordance with its terms and conditions.

     3A.3. Noncontravention. None of the execution, delivery or performance of
this Agreement (or any of the Closing Agreements to which it is a party), or
the consummation of the sale of the Shares and the other transactions
contemplated hereby and thereby, will (a) violate any constitution, statute,
regulation, rule, injunction, judgment, order, decree, ruling, charge, or other
restriction of any government, governmental agency, or court to which such
Seller or any of its properties or assets are subject or any provision of the
charter or by-laws (or similar constitutional documents) of such Seller, if
applicable, (b) result in any conflict with, breach of, or default (or give
rise to any Lien or a right to termination, cancellation or acceleration or
loss of any right or benefit) under, or require any consent or approval which
has not been, or prior to Closing will not be, obtained or waived with respect
to, any contract, agreement, lease, Permit, instrument or other arrangement to
which such Seller is a party or by which it or its properties or assets is
subject or bound, or constitute an event which, with notice, lapse of time or
both, would result in any such breach, default, termination, cancellation,
acceleration or loss of right or benefit. Such Seller need not give any notice
to, make any filing with, or obtain any authorization, consent, or approval of
any government or governmental agency in order for the Parties to consummate
the transactions contemplated by this Agreement.

                                      34
<PAGE>


4. Representations and Warranties of the Buyer. The Buyer represents and
warrants to the Sellers that the statements contained in this Section 4 are
correct and complete as of the date of this Agreement and will be correct and
complete as of the Closing Date (as though made then) as though the Closing
Date were substituted for the date of this Agreement throughout this Section 4
(unless a date is specified in a particular representation and warranty).

     4.1. Organization of the Buyer. The Buyer is a corporation duly organized,
validly existing and in good standing under the laws of the jurisdiction of its
incorporation.

     4.2. Authority for Agreement. The Buyer has full power and authority
(including full corporate power and authority) to execute and deliver this
Agreement and to perform its obligations hereunder. This Agreement constitutes
the valid and legally binding obligation of the Buyer, enforceable in
accordance with its terms and conditions.

     4.3. Noncontravention. Neither the execution and the delivery of this
Agreement, nor the consummation of the transactions contemplated hereby will
(i) violate any constitution, statute, regulation, rule, injunction, judgment,
order, decree, ruling, charge, or other restriction of any government,
governmental agency, or court to which the Buyer is subject or any provision of
its charter or by-laws or (ii) conflict with, result in a breach of, constitute
a default under, result in the acceleration of, create in any party the right
to accelerate, terminate, modify, or cancel, or require any notice under any
agreement, contract, lease, license, instrument, or other arrangement to which
the Buyer is a party or by which it is bound or to which any of its assets is
subject. The Buyer does not need to give any notice to, make any filing with,
or obtain any authorization, consent, or approval of any government or
governmental agency in order for the Parties to consummate the transactions
contemplated by this Agreement (including the assignments and assumptions
referred to in Section 2 above), except for required filings under the
Hart-Scott-Rodino Act, which filings have been made.

     4.4. Brokers' Fees. The Buyer has no Liability or obligation to pay any
fees or commissions to any broker, finder, or agent with respect to the
transactions contemplated by this Agreement for which the Sellers could become
liable or obligated.

5.   Covenants. The Parties agree as follows:

     5.1. General. Each of the Parties will use commercially reasonable efforts
to take all action and to do all things necessary, proper, or advisable in
order to consummate and make effective the transactions contemplated by this
Agreement (including satisfaction, but not waiver, of the closing conditions
set forth in Section 6 below).

     5.2. Notices and Consents. The Company and the Sellers have given any
notices to third parties, and will each use their best efforts to obtain any
third party consents, that are required in connection with the transactions
contemplated by this Agreement, as set forth in Section 3.29 to the Disclosure
Schedule and any other consent that the Buyer may request.

                                      35
<PAGE>


Each of the Parties has filed Notification and Report Forms and related
material that may be required to be filed with the Federal Trade Commission and
the Antitrust Division of the United States Department of Justice under the
Hart-Scott-Rodino Act, and will make any further filings pursuant thereto that
may be necessary in connection therewith.

     5.3. Operation of Business. The Company will not (and will not cause or
permit any of its Subsidiaries to) engage in any practice, take any action, or
enter into any transaction outside the Ordinary Course of Business. Without
limiting the generality of the foregoing, the Company (i) will not (and will
not cause or permit any of its Subsidiaries to) (A) issue, sell or otherwise
dispose of any of its capital stock or grant any options, warrants or other
rights to purchase or obtain (including upon conversion, exchange or exercise)
any of its capital stock, except upon exercise of options to purchase Common
Stock outstanding on the date hereof, declare, set aside, or pay any dividend
or make any distribution with respect to its capital stock or redeem, purchase,
or otherwise acquire any of its capital stock, (B) will not pay any amount to
any third party with respect to any Liability or obligation (including any
costs and expenses the Company has incurred or may incur in connection with
this Agreement and the transactions contemplated hereby) outside the Ordinary
Course of Business or in excess of $100,000, (C) otherwise engage in any
practice, take any action, or enter into any transaction of the sort described
in Section 3.9 above or (D) repay or otherwise satisfy any Indebtedness for
borrowed money other than in the Ordinary Course of Business, factor, or
accelerate the collection of, accounts receivable or delay the payment of
accounts payables and (ii) will (A) keep available to the Buyer the services of
the Company's present officers, employees, agents and independent contractors,
and (B) preserve for the benefit of the Buyer the goodwill of Sellers'
customers, suppliers, landlords and others having business relations with it.
Notwithstanding the foregoing, the Company may (w) pay such amounts to the
holder of the Imperial Warrant as may be necessary in connection with the
purchase or termination of the Imperial Warrant, (x) distribute to its
stockholders (by dividend or otherwise) up to 150,000 shares of common stock of
Hybridon, Inc. held by the Company on the date hereof (or the proceeds
thereof), (y) make any capital expenditure in the Ordinary Course of Business
in excess of $250,000 and (z) repay Indebtedness under the $1,000,000
Promissory Note dated January 21, 1999 to Imperial Bank.

     5.4. Preservation of Business. The Company will keep (and will cause each
of its Subsidiaries to keep) its business and properties substantially intact,
including its present operations, physical facilities, working conditions and
relationships with lessors, licensors, suppliers, customers and employees.

     5.5. Full Access. The Company will permit (and will cause each of its
Subsidiaries to permit) representatives of the Buyer to have full access at all
reasonable times and upon reasonable notice, and in a manner so as not to
interfere with the normal business operations of the Company and its
Subsidiaries, to all premises, properties, personnel, books, records (including
Tax records), contacts and documents of or pertaining to each of the Company
and its Subsidiaries.

                                      36
<PAGE>


     5.6. Notice of Redemption of Series A Preferred Stock. Promptly following
the execution of this Agreement, the Company will provide a written notice to
the holders of the Series A Preferred Stock notifying such holders that the
Company will exercise its "call" right under Article 5.5 of the Company's
articles of incorporation in connection with the transactions contemplated by
this Agreement. Each holder of Series A Preferred Stock hereby agrees that he
will not exercise his right to convert such Series A Preferred Stock into
Common Stock on or prior the Closing Date.

     5.7. Notice of Developments. Each Party will give prompt written notice to
the other Party of any development causing a breach of any of its own
representations and warranties in Section 3 and Section 4 above. No disclosure
by any Party pursuant to this Section 5.7, however, shall be deemed to amend or
supplement the Disclosure Schedule or to prevent or cure any
misrepresentations, breach of warranty, or breach of covenant.

     5.8. Exclusivity. Until November 30, 1999, none of the Company and the
Sellers will (and the Company will not cause or permit any of its Subsidiaries,
or any of their officers, directors, employees, agents or Affiliates to) (i)
solicit, initiate, or encourage the submission of any proposal or offer from
any Person relating or enter into or consummate any transaction relating to the
acquisition of any capital stock or other voting securities, or any substantial
portion of the assets, of any of the Company and its Subsidiaries (other than
sales of inventory for a fair value in the Ordinary Course of Business)
(including any acquisition structured as a merger, consolidation, or share
exchange) or (ii) participate in any discussions or negotiations regarding,
furnish any information with respect to, assist or participate in, or
facilitate in any other manner any effort or attempt by any Person to do or
seek any of the foregoing. The Company and Sellers will notify the Buyer
immediately if any Person makes any proposal, offer, inquiry, or contact with
respect to any of the foregoing.

     5.9. Assistance in Financing. The Sellers acknowledge that the Buyer
currently intends that a payment of a certain amount of the Aggregate Purchase
Price pursuant to Section 2 will be financed by a debt financing. The Company
hereby consents to the use of its name and the names of its Subsidiaries in
connection with the efforts to raise such debt financing. Further, the Sellers
shall and shall cause the Company and its Subsidiaries and their respective
officers, directors, employees, accountants, counsel, financial advisors and
other agents to provide necessary assistance in connection with the Buyer's
efforts to raise such financing, including, without limitation, (a) the
preparation of audited and pro forma financial statements in accordance with
Regulation S-X under the Securities Exchange Act of 1934, as amended, giving
effect to the acquisition by the Buyer of the Company, (b) causing the
Company's accountants to provide all consents and opinions necessary in
connection with such financing and (c) causing the Company's officers to
participate in customary "road show" presentations that may be reasonably
requested by the Buyer.

     5.10. Access to Records after Closing. For a period of five years after
the Closing Date, the Sellers and their representatives shall have reasonable
access to all of the books and

                                      37
<PAGE>

     records of the Company to the extent that such access may reasonably be
required by the Sellers in connection with matters relating to or affected by
the operations of the Company and its Subsidiaries prior to the Closing Date.
Such access shall be afforded by the Buyer upon receipt of reasonable advance
notice and during normal business hours. The Sellers shall be solely
responsible for any costs or expenses incurred by them pursuant to this Section
5.10. If the Buyer shall desire to dispose of any of such books and records
prior to the expiration of such five-year period, the Buyer shall, prior to
such disposition, give the Sellers a reasonable opportunity, at the Sellers'
expense, to segregate and remove such books and records as the Sellers may
select.

     5.11. Future Assurances. At any time and from time to time after the
Closing, at the request of the Buyer and without further consideration, the
Sellers will execute and deliver such other instruments of sale, transfer,
conveyance, assignment and confirmation and take such action as the Buyer may
reasonably determine is necessary to transfer, convey and assign to the Buyer,
and to confirm the Buyer's title to or interest in the Company, to put the
Buyer in actual possession and operating control thereof and to assist the
Buyer in exercising all rights with respect thereto. Effective upon the
Closing, each of the Sellers hereby constitutes and appoints the Buyer and its
successors and assigns as its true and lawful attorney in fact in connection
with the transactions contemplated by this instrument, with full power of
substitution, in the name and stead of such Seller but on behalf of and for the
benefit of the Buyer and its successors and assigns, to demand and receive any
and all of the assets, properties, rights and business hereby conveyed,
assigned and transferred or intended so to be, and to give receipt and releases
for and in respect of the same and any part thereof, and from time to time to
institute and prosecute, in the name of one or more of the Sellers or
otherwise, for the benefit of the Buyer or its successors and assigns,
proceedings at law, in equity, or otherwise, which the Buyer or its successors
or assigns reasonably deem proper in order to collect or reduce to possession
or any of the assets of the Company to do all acts and things in relation to
the assets which the Buyer or its successors or assigns reasonably deem
desirable.

     5.12. Release of Guarantees. Following the Closing, Buyer shall make
commercially reasonable efforts to have William C. Hobson, Douglas Kornbrust
and the William C. Hobson and Mary Beth Husemoller 1998 Revocable Trust Dated
October 7, 1998 released from their obligations under the Commercial Guaranties
dated January 21, 1999 executed by such persons in favor of Imperial Bank.
Buyer hereby agrees to indemnify, defend and hold each of the foregoing
harmless from any Liabilities and Losses arising from such guarantees.

6.   Conditions to Obligation to Close.

     6.1. Conditions to Obligation of the Buyer. The obligation of the Buyer to
consummate the transactions to be performed by it in connection with the
Closing is subject to satisfaction of the following conditions on, or prior to,
the Closing Date:

                                      38
<PAGE>


          (a) Representations and Warranties. The representations and
     warranties set forth in Section 3 above shall be true and correct when
     made and shall be deemed to have been made again at and as of the Closing
     Date and shall then be true and correct;

          (b) Performance by Sellers. The Sellers and the Company shall have
     performed and complied with all of their covenants, agreements and
     obligations hereunder through the Closing Date;

          (c) Consents. The Sellers shall have procured all of the governmental
     approvals, consents or authorizations and third party consents specified
     in Section 3.29 and Section 5.2 above;

          (d) Absence of Litigation. No action, suit, or proceeding shall be
     pending or threatened before any court or quasi-judicial or administrative
     agency of any federal, state, local, or foreign jurisdiction wherein an
     unfavorable injunction, judgment, order, decree, ruling, or charge would
     (i) prevent consummation of any of the transactions contemplated by this
     Agreement, (ii) cause any of the transactions contemplated by this
     Agreement to be rescinded following consummation, (iii) affect adversely
     the right of the Buyer to own the Shares or to operate the businesses of
     the Company and its Subsidiaries (and no such injunction, judgment, order,
     decree, ruling, or charge shall be in effect);

          (e) Anti-trust Matters. All applicable waiting periods (and any
     extensions thereof) under the Hart-Scott-Rodino Act shall have expired or
     otherwise been terminated;

          (f) Employment and Noncompetition Agreements. The Persons listed on
     Schedule 6.1(f) shall have entered into an Employment Agreement and a
     Noncompetition Agreement substantially in the form of Exhibits 6.1(f)(i)
     and 6.1(f)(ii) and the same shall be in full force and effect;

          (g) Certificates. The Sellers shall have delivered to the Buyer a
     certificate to the effect that each of the conditions specified in Section
     6.1 are satisfied in all respects;

          (h) [Reserved];

          (i) Resignations. The Buyer shall have received the resignations,
     dated as of the Closing Date, of each officer and director of the Company
     and of each officer and director of its Subsidiaries;

                                      39
<PAGE>


          (j) Opinion. The Buyer shall have received from counsel to the
     Sellers and the Company an opinion in form and substance reasonably
     satisfactory to the Buyer, addressed to the Buyer, and dated as of the
     Closing Date;

          (k) Escrow Agreement. The Sellers shall have executed and delivered
     the Escrow Agreement, in form and substance the same or substantially the
     same as the Escrow Agreement set forth in Exhibit 2.2;

          (l) No Material Adverse Change. There shall not have been any change
     which has resulted in a Material Adverse Effect and no event shall have
     occurred or circumstance shall exist that may result in a Material Adverse
     Effect;

          (m) Financing. The closing under the Recap Agreement shall have
     occurred on or prior to the Closing Date and the Buyer shall have obtained
     financing, on terms and conditions satisfactory to it, sufficient to
     consummate each of (i) the recapitalization contemplated by the Recap
     Agreement and (ii) the transactions contemplated hereby;

          (n) Acknowledgment and Consent by Equity Holders. The Buyer shall
     have received the written acknowledgment and consent of each holder of any
     equity interest in the Company on and after July 9, 1999 relating to this
     transaction in form and substance satisfactory to the Buyer; and

          (o) All Necessary Actions. All actions to be taken by the Company and
     its Subsidiaries in connection with the consummation of the transactions
     contemplated hereby and all certificates, opinions, instruments and other
     documents required to effect the transactions contemplated hereby will be
     reasonably satisfactory in form and substance to the Buyer.

The Buyer may waive any condition specified in this Section 6.1 if it executes
a writing so stating at or prior to the Closing and such waiver shall not be
considered a waiver of any other provision in this Agreement (including,
without limitation, the provisions of Section 9) unless the writing
specifically so states.

     6.2. Conditions to Obligations of the Sellers. The obligation of the
Sellers to consummate the transactions to be performed by them in connection
with the Closing is subject to satisfaction of the following conditions on, or
prior to, the Closing Date:

(a) Representations and
Warranties. The representations and warranties set forth in Section 4 above
shall be true and correct at and as of the Closing Date;

          (b) Performance by Buyer. The Buyer shall have performed and complied
     with all of its covenants, agreements and obligations hereunder through
     the Closing;

                                      40
<PAGE>


          (c) Absence of Litigation. No action, suit, or proceeding shall be
     pending or threatened before any court or quasi-judicial or administrative
     agency of any federal, state, local, or foreign jurisdiction wherein an
     unfavorable injunction, judgment, order, decree, ruling, or charge would
     (i) prevent consummation of any of the transactions contemplated by this
     Agreement or (ii) cause any of the transactions contemplated by this
     Agreement to be rescinded following consummation (and no such injunction,
     judgment, order, decree, ruling, or charge shall be in effect);

          (d) Certificate. The Buyer shall have delivered to the Company a
     certificate to the effect that each of the conditions specified in Section
     6.2 are satisfied in all respects;

          (e) Performance Bonus Plan. The Buyer shall have adopted the
     Performance Bonus Plan substantially in the form of Exhibit 6.2(e) (the
     "Performance Bonus Plan").

          (f) Employment and Noncompetition Agreements. The Company shall have
     duly executed and delivered an Employment Agreement and a Noncompetition
     Agreement substantially in the form of Exhibits 6.1(f)(i) and 6.1(f)(ii)
     with each of the Persons listed on Schedule 6.1(f);

          (g) Anti-trust Matters. All applicable waiting periods (and any
     extensions thereof) under the Hart-Scott-Rodino Act shall have expired or
     otherwise been terminated;

          (h) Opinion. The Company shall have received from counsel to the
     Buyer an opinion in form and substance reasonably satisfactory to the
     Company, addressed to the Company, and dated as of the Closing Date; and

          (i) All Necessary Actions. All actions to be taken by the Buyer in
     connection with the consummation of the transactions contemplated hereby
     and all certificates, opinions, instruments and other documents required
     to effect the transactions contemplated hereby will be reasonably
     satisfactory in form and substance to the Sellers.

The Sellers may waive any condition specified in this Section 6.2 if they
execute a writing so stating at or prior to the Closing and such waiver shall
not be considered a waiver of any other provision in this Agreement (including,
without limitation, Section 9) unless the writing specifically so states.

7.   Confidentiality.

                                      41
<PAGE>


     7.1. No Party shall issue a press release or otherwise disclose the
existence of this Agreement, the contents hereof or the transactions
contemplated hereby except as the Buyer may determine is necessary or desirable
in connection with obtaining the financing described in Section 5.9.

     7.2. From and after the Closing, each of the Sellers will treat and hold
as such all of the Confidential Information, refrain from disclosing or using
any of the Confidential Information except in connection with such Seller's
employment with, and for the benefit of, the Company. In the event that any of
the Sellers is requested or required (by oral question or request for
information or documents in any legal proceeding, interrogatory, subpoena,
civil investigative demand, or similar process) to disclose any Confidential
Information, such Person will notify the Buyer promptly of the request or
requirement so that the Buyer may seek an appropriate protective order or waive
compliance with the provisions of this Section 7. If, in the absence of a
protective order or the receipt of a waiver hereunder, any of the Sellers is,
on the advice of counsel, compelled to disclose any Confidential Information to
any tribunal or else stand liable for contempt, that Person may disclose the
Confidential Information to the tribunal; provided, however, that the
disclosing Person shall use his best efforts to obtain, at the request of the
Buyer, an order or other assurance that confidential treatment will be accorded
to such portion of the Confidential Information required to be disclosed as the
Buyer shall designate.

     8. Noncompetition. Each Seller who is employed by the Company and is or
becomes party to a Non-Competition Agreement and/or an Employment Agreement in
connection with the transactions contemplated hereby, agrees that, in
consideration of the purchase by the Buyer hereunder, he or she shall comply
with the provisions of the Non-Competition Agreement and Section 6 of the
Employment Agreement to which such Seller is party.

9.   Indemnification.

     9.1. Survival of Representations and Warranties. All of the
representations and warranties of the Sellers (except for those contained in
Sections 3.1 (Organization of the Company), 3.2 (Capitalization and Ownership
of the Company), 3.3 (Authorization of Transaction), 3.5 (Brokers' Fees), 3.13
(Taxes) and 3.24 (Environment, Health and Safety)) contained herein or in any
document, certificate or other instrument required to be delivered hereunder
shall survive the Closing and continue in full force and effect until two years
following the Closing. The representations and warranties of Sellers contained
in Section 3.24 shall survive the Closing and shall continue in full force and
effect for a period of three years thereafter. The representations and
warranties of Sellers contained in Sections 3.1, 3.2, 3.3, 3.5 and 3.13 shall
survive the Closing and shall continue in full force and effect without limit
as to time (subject to any applicable statutes of limitations and any
extensions or waivers thereof for Taxes). All of the representations and
warranties of the Buyer contained in Section 4 shall survive the Closing and
shall continue in full force and effect without limit as to time, except for
the representations and warranties of the Buyer contained in Section 4.3 which
shall survive the Closing and continue in full force and effect until two years
following

                                      42
<PAGE>


the Closing. The termination of any such representation and warranty, however,
shall not affect any claim for breaches or inaccuracies of representations or
warranties if written notice thereof is given to the breaching party or parties
prior to such termination date. All covenants and indemnities of the Sellers
and the Buyer in this Agreement or in any document or certificate delivered
hereunder shall, unless otherwise specifically provided therein, remain in full
force and effect without limitation as to time.

     9.2. Indemnity by Sellers Relating to the Company.

          (a) Subject to the limitations set forth in this Section 9.2, the
     Sellers (in the case of the Sellers other than those listed in Schedule
     9.2, solely to the extent of such Seller's Pro Rata Share (as defined in
     the Escrow Agreement) of the Escrow Amount) hereby agree to jointly and
     severally indemnify, defend and hold harmless the Buyer and its directors,
     officers and Affiliates against and in respect of all Liabilities,
     obligations, judgments, Liens, injunctions, charges, orders, decrees,
     rulings, damages, dues, assessments, Taxes, losses, fines, penalties,
     expenses, fees, costs, amounts paid in settlement (including reasonable
     attorneys' and expert witness fees and disbursements in connection with
     investigating, defending or settling any action or threatened action),
     arising out of any claim, damages, complaint, demand, cause of action,
     audit, investigation, hearing, action, suit or other proceeding asserted
     or initiated or otherwise existing in respect of any matter (collectively,
     the "Losses") arising from, or in connection with, (i) the breach or
     inaccuracy of any representation or warranty made by the Sellers in
     Section 3, as if all materiality provisions were not contained therein or
     (ii) nonfulfillment of any agreement or covenant of the Company, with
     respect to periods on or prior to the Closing Date, contained herein or in
     any agreement or instrument required to be entered into in connection
     herewith (it being understood that the Employment Agreements and the
     Noncompetition Agreements entered into pursuant to Section 6.1(f) shall be
     excluded for purposes of this clause (ii)). Any Person claiming
     indemnification under this Section 9.2 shall provide the Seller
     Representative written notice of such claim, whether or not arising out of
     a claim by a third party.

          (b) Except as provided in clause (c), (i) the Sellers shall be
     obligated to indemnify Persons pursuant to clause (a)(i) only to the
     extent the aggregate of all such Losses exceeds $250,000 and (ii) the
     aggregate liability of the Sellers to indemnify any and all Persons
     pursuant to clause (a)(i) shall in no event exceed $10.0 million.

          (c) The obligations of the Sellers to indemnify Losses under Section
     9.2 shall be satisfied in cash; it being understood and agreed that (i) to
     the extent there are funds in the Escrow Account, the Buyer will exercise
     its rights to withdraw cash therefrom to satisfy such obligations and (ii)
     the obligation of any Seller listed on Schedule 9.2 to indemnify Losses
     under Section 9.2 shall in no event exceed the amount set forth on
     Schedule 9.2.

                                      43
<PAGE>


          (d) Notwithstanding the foregoing provisions of clause (b) and (c),
     no minimum or maximum dollar limitation shall apply to the liability of
     the Sellers listed on Schedule 9.2 with respect to any claim (i) arising
     from, or in connection with, the representations and warranties contained
     in Sections 3.2 (Capitalization and Ownership of the Company), 3.3
     (Authorization of Transaction), 3.5 (Brokers' Fees), 3.6 (Title to
     Assets), 3.13 (Taxes) and 3.24 (Environment, Health and Safety) or (ii)
     based on fraud.

     9.3. Indemnity by Sellers .

          (a) Each Seller hereby agrees to indemnify, defend and hold harmless
     the Buyer and its directors, officers and Affiliates against and in
     respect of all Liabilities, obligations, judgments, Liens, injunctions,
     charges, orders, decrees, rulings, damages, dues, assessments, Taxes,
     losses, fines, penalties, expenses, fees, costs, amounts paid in
     settlement (including reasonable attorneys' and expert witness fees and
     disbursements in connection with investigating, defending or settling any
     action or threatened action), arising out of any claim, damages,
     complaint, demand, cause of action, audit, investigation, hearing, action,
     suit or other proceeding asserted or initiated or otherwise existing in
     respect of any matter (collectively, the "Losses") arising from, or in
     connection with, (i) the breach or inaccuracy of any representation or
     warranty made by such Seller in Section 3A, as if all materiality
     provisions were not contained therein or (ii) nonfulfillment of any
     agreement or covenant of such Seller contained herein or in any agreement
     or instrument required to be entered into in connection herewith. Any
     Person claiming indemnification under this Section 9.3 shall provide the
     applicable Seller(s) written notice of such claim, whether or not arising
     out of a claim by a third party.

          (b) The obligations of the Sellers to indemnify Losses under Section
     9.3 shall be satisfied in cash.

          (c) No minimum or maximum dollar limitation shall apply to the
     liability of any Seller with respect to any claim under this Section 9.3;
     provided, however, that the obligation of the Sellers who are not Seller
     Employees to indemnify Losses under Section 9.3 shall in no event exceed
     the proceeds such Seller, as the case may be, receives from the Buyer or
     the Company in consideration of his capital stock of the Company in
     connection with the transactions contemplated by this Agreement.

     9.4. Indemnity by Buyer.

          (a) Subject to Section 10.2 and the limitations set forth in this
     Section 9.4, the Buyer hereby agrees to indemnify, defend and hold
     harmless the Sellers and their respective directors, officers and
     Affiliates against and in respect of all Losses arising from, or in
     connection with, (i) the breach or inaccuracy of any representation or

                                      44
<PAGE>


     warranty made by the Buyer herein, as if all materiality provisions were
     not contained therein or (ii) nonfulfillment of any agreement or covenant
     of the Buyer or, with respect to periods after the Closing Date, the
     Company contained herein or in any agreement or instrument required to be
     entered into in connection herewith. Any Person claiming indemnification
     under this Section 9.4 shall provide the Buyer written notice of such
     claim, whether or not arising out of a claim by a third party.

          (b) Except as provided in clause (c), (i) the Buyer shall be
     obligated to indemnify Persons pursuant to clause (a)(i) only to the
     extent the aggregate of all such Losses exceeds $250,000 and (ii) the
     aggregate liability of the Buyer to indemnify any and all Persons pursuant
     to clause (a)(i) shall in no event exceed $10.0 million.

          (c) The obligations of the Buyer to indemnify Losses under Section
     9.4 shall be satisfied in cash.

          (d) Notwithstanding the foregoing provisions of clause (b), no
     minimum or maximum dollar limitation shall apply to the liability of the
     Buyer with respect to any claim (i) arising from or in connection with,
     the representations and warranties contained in Sections 4.1 (Organization
     of Buyer), 4.2 (Authority for Agreement) or 4.4 (Broker's Fee) or (ii)
     based on fraud.

     9.5. Matters Involving Third Parties.

          (a) If any third party shall notify any Person (the "Indemnified
     Party") with respect to any matter (a "Third Party Claim") which may give
     rise to a claim for indemnification against any other Person (the
     "Indemnifying Party") under this Section 9, then the Indemnified Party
     shall promptly notify each Indemnifying Party thereof in writing;
     provided, however, that no delay on the part of the Indemnified Party in
     notifying any Indemnifying Party shall relieve the Indemnifying Party from
     any obligation hereunder unless (and then solely to the extent) the
     Indemnifying Party thereby is prejudiced.

          (b) Any Indemnifying Party will have the right to defend the
     Indemnified Party against the Third Party Claim with counsel of its choice
     reasonably satisfactory to the Indemnified Party so long as (i) the
     Indemnifying Party notifies the Indemnified Party in writing within 15
     days after the Indemnified Party has given notice of the Third Party Claim
     that the Indemnifying Party will indemnify the Indemnified Party from and
     against the entirety of any Losses the Indemnified Party may suffer
     resulting from, arising out of, relating to, in the nature of, or caused
     by the Third Party Claim, (ii) the Indemnifying Party provides the
     Indemnified Party with evidence acceptable to the Indemnified Party that
     the Indemnifying Party will have the financial resources to defend against
     the Third Party Claim and fulfill its indemnification obligations
     hereunder, (iii) the Third Party Claim involves only money damages and
     does not seek

                                      45
<PAGE>


     an injunction or other equitable relief, (iv) settlement of, or an adverse
     judgment with respect to, the Third Party Claim is not, in the good faith
     judgment of the Indemnified Party, likely to establish a precedential
     custom or practice adverse to the continuing business interests of the
     Indemnified Party and (v) the Indemnifying Party conducts the defense of
     the Third Party Claim actively and diligently.

          (c) So long as the Indemnifying Party is conducting the defense of
     the Third Party Claim in accordance with Section 9.5(b) above, (i) the
     Indemnified Party may retain separate co-counsel at its sole cost and
     expense and participate in the defense of the Third Party Claim, (ii) the
     Indemnified Party will not consent to the entry of any judgment or enter
     into any settlement with respect to the Third Party Claim without the
     prior written consent of the Indemnifying Party (which consent shall not
     unreasonably be withheld) and (iii) the Indemnifying Party will not
     consent to the entry of any judgment or enter into any settlement with
     respect to the Third Party Claim unless written agreement is obtained
     releasing the Indemnified Party from all liability thereunder.

          (d) In the event any of the conditions in Section 9.5(b) above is or
     becomes unsatisfied, however, (i) the Indemnified Party may defend
     against, and consent to the entry of any judgment or enter into any
     settlement with respect to, the Third Party Claim in any manner it may
     deem appropriate (and the Indemnified Party need not consult with, or
     obtain any consent from, any Indemnifying Party in connection therewith),
     (ii) the Indemnifying Parties will reimburse the Indemnified Party
     promptly and periodically for the costs of defending against the Third
     Party Claim (including attorneys' fees and expenses) and (iii) the
     Indemnifying Parties will remain responsible for any Losses the
     Indemnified Party may suffer resulting from, arising out of, relating to,
     in the nature of, or caused by the Third Party Claim to the fullest extent
     provided in this Section 9.

     9.6. Other Indemnification Provisions. Each of the Sellers hereby agrees
that he, she or it will not make any claim for indemnification against any of
the Buyer, the Company and any of their Subsidiaries solely by reason of the
fact that he or it was a director, officer, employee, or agent of the Company
or was serving at the request of any such entity as a partner, trustee,
director, officer, employee, or agent of another entity (whether such claim is
for judgments, damages, penalties, fines, costs, amounts paid in settlement,
losses, expenses, or otherwise and whether such claim is pursuant to any
statute, charter document, bylaw, agreement, or otherwise) with respect to any
action, suit, proceeding, complaint, claim, or demand brought by the Buyer or
any other Person entitled to indemnification pursuant to this Agreement against
such Seller (whether such action, suit, proceeding, complaint, claim, or demand
is pursuant to this Agreement, applicable law, or otherwise).

10.  Termination.

                                      46
<PAGE>


     10.1. Termination of Agreement. This Agreement may be terminated as
provided below:

          (a) the Parties may terminate this Agreement by mutual written
     consent at any time prior to the Closing;

          (b) the Buyer may terminate this Agreement by giving written notice
     to the Sellers on or prior to September 24, 1999 if the Buyer shall not
     have satisfactorily completed its due diligence investigation of the
     Company;

          (c) this Agreement shall terminate without any action by any Party in
     the event that the condition precedent set forth in Section 6.1(m) shall
     not have been satisfied on or before September 24, 1999; provided,
     however, that this Agreement shall not so terminate if, not later than the
     close of business on September 24, 1999, the Buyer shall have delivered to
     the Sellers a written binding commitment to the effect that if each of the
     conditions precedent under Section 6.1 hereof (other than the condition
     precedent set forth in Section 6.1(m)) shall be satisfied from and after
     September 24, 1999 through and including the Payment Date (as if the term
     Closing Date were replaced by the term Payment Date wherever it appears
     therein), the Company shall be paid an amount equal to $5,000 multiplied
     by the number of calendar days from and after September 25, 1999 through
     and including the earlier of (a) the date on which this Agreement is
     terminated pursuant to Section 10.1(d)(ii) and (b) November 30, 1999 (such
     date, the "Payment Date").

          (d) the Buyer may terminate this Agreement by giving written notice
     to the Sellers at any time prior to the Closing (i) in the event the
     Sellers have breached any representation, warranty, or covenant contained
     in this Agreement in any material respect, the Buyer has notified the
     Sellers of the breach, and the breach has continued without cure for a
     period of 30 days after the notice of breach, (ii) if the Closing shall
     not have occurred on or before November 30, 1999, by reason of the failure
     of any condition precedent under Section 6.1 hereof (unless the failure
     results primarily from the Buyer itself breaching any representation,
     warranty, or covenant contained in this Agreement); and

          (e) the Seller Representative may terminate this Agreement by giving
     written notice to the Buyer at any time prior to the Closing (i) in the
     event the Buyer has breached any representation, warranty, or covenant
     contained in this Agreement in any material respect, the Sellers or the
     Company have notified the Buyer of the breach, and the breach has
     continued without cure for a period of 30 days after the notice of breach
     or (ii) if the Closing shall not have occurred on or before November 30,
     1999, by reason of the failure of any condition precedent under Section
     6.2 hereof (unless the failure results primarily from the Sellers or the
     Company itself breaching any representation, warranty, or covenant
     contained in this Agreement).

     10.2. Effect of Termination. If this Agreement is terminated pursuant to
Section 10.1 above, all rights and obligations of the Parties hereunder shall
terminate without any Liability of any Party to any other Party (except for any
Liability of any Party then in breach and (b) as set forth in any agreement
delivered in accordance with the proviso to Section 10.1(c)); it being
understood that the Buyer shall not be, nor shall it be deemed to be, in breach
of this Agreement if the condition precedent set forth in Section 6.1(m) is not
satisfied or waived.

11.  Miscellaneous.

     11.1. Press Releases and Public Announcements. No Party shall issue any
press release or make any public announcement relating to the subject matter of
this Agreement prior to the Closing without the prior approval of the other
Party; provided, however, that any Party may make any public disclosure it
believes in good faith is required by applicable law or any listing or trading
agreement concerning its publicly traded securities (in which case the
disclosing Party will provide the other Party with the opportunity to review in
advance the disclosure).

     11.2. No Third Party Beneficiaries. Except and solely to the extent set
forth in Sections 9.2, 9.3 and 9.4, this Agreement shall not confer any rights
or remedies upon any Person other than the Parties and their respective
successors and permitted assigns.

     11.3. Seller Representative. Each of the Sellers hereby appoints William
C. Hobson, as the agent, proxy, and attorney-in-fact for the Sellers (in such
capacity, the "Seller Representative") for all purposes under this Agreement
(including without limitation full power and authority to act on the Sellers'
behalf, and retain legal counsel) to take any action, should it elect to do so
in its sole discretion, (i) to conduct or cease to conduct, should it elect to
do so in its sole discretion, the defense of all claims against the Sellers
under Section 9.2, and settle all such claims in its sole discretion on behalf
of all the Sellers and exercise any and all rights which the Sellers are
permitted or required to do or exercise in connection therewith and (ii) in
connection with the purchase price adjustment described in Section 2.3;
provided, however, that the Seller Representative shall have no obligation to
conduct any defense or settle any claim or take any other action whatsoever on
behalf of any Seller under this Section 11.3 or otherwise in its capacity as
Seller Representative. Each Seller hereby waives the conflict of interest
inherent in the service of the Seller Representative both in such capacity and
as an officer and director of SBI. Each Seller further agrees to hold the
Seller Representative free and harmless and to reimburse the Seller
Representative for any and all loss, cost, claim, expense, damage or liability
incurred or sustained by him as a result of any action taken by him in good
faith pursuant to his appointment as the Seller Representative under this
Agreement.

     11.4. Entire Agreement. This Agreement (including the documents referred
to herein) constitutes the entire agreement between the Parties and supersedes
any prior understandings, agreements, or representations by or between the
Parties, written or oral

                                      48


     (including without limitation the Original Agreement), to the extent they
     relate in any way to the subject matter hereof.

     11.5. Succession and Assignment. This Agreement shall be binding upon and
inure to the benefit of the Parties named herein and their respective
successors and permitted assigns. No Seller may assign either this Agreement or
any of its rights, interests, or obligations hereunder without the prior
written approval of the Buyer. The Buyer may not assign either this Agreement
or any of its rights, interests, or obligations hereunder without the prior
written consent of the Seller Representative; provided, however, that the Buyer
may (a) assign any or all of its rights and interests hereunder to one or more
of its Affiliates, (b) designate one or more of its Affiliates to perform its
obligations hereunder and (c) transfer any or all of its rights and interests
hereunder to the Person(s) who, directly or indirectly, provide financing in
connection with the transactions contemplated by the Agreement.

     11.6. Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original but all of which
together will constitute one and the same instrument.

     11.7. Headings. The Section headings contained in this Agreement are
inserted for convenience only and shall not affect in any way the meaning or
interpretation of this Agreement.

     11.8. Notices. All notices, requests, demands, claims and other
communications hereunder will be in writing. Any notice, request, demand,
claim, or other communication hereunder shall be deemed duly given (i) upon
confirmation of facsimile, (ii) one business day following the date sent when
sent by overnight delivery and (iii) five business days following the date
mailed when mailed by registered or certified mail return receipt requested and
postage prepaid at the following address:

     If to the Sellers:

     At the address set forth opposite their names on the signature pages
hereto.

     If to the Company:

     SBI Holdings, Inc.
     587 Dunn Circle
     Sparks, Nevada  89431
     Attention:  President

     Copy to:

     Hillyer & Irwin, PC

                                      49
<PAGE>


     550 West C Street, 16th Floor
     San Diego, CA  92101
     Attention:  John C. O'Neill

     If to the Buyer:

     Charles River Laboratories, Inc.
     251 Ballardvale St.
     Wilmington, MA  01887
     Attention:

     Copy to:

     Ropes & Gray
     One International Place
     Boston, MA  02110
     Attention:  Lauren I. Norton

Any Party may send any notice, request, demand, claim, or other communication
hereunder to the intended recipient at the address set forth above using any
other means (including personal delivery, expedited courier, messenger service,
telecopy, telex, ordinary mail, or electronic mail), but no such notice,
request, demand, claim, or other communication shall be deemed to have been
duly given unless and until it actually is received by the intended recipient.
Any Party may change the address to which notices, requests, demands, claims
and other communications hereunder are to be delivered by giving the other
Party notice in the manner herein set forth.

     11.9. Governing Law. This Agreement shall be governed by and construed in
accordance with the domestic laws of the State of Delaware without giving
effect to any choice or conflict of law provision or rule (whether of the State
of Delaware or any other jurisdiction) that would cause the application of the
laws of any jurisdiction other than the State of Delaware.

     11.10. Arbitration.

          (a) Except solely as set forth in clauses (b) and (c), each dispute,
     difference, controversy or claim arising in connection with or related or
     incidental to, or question occurring under, this Agreement or the subject
     matter hereof shall be finally settled under the Commercial Arbitration
     Rules of the American Arbitration Association (the "AAA") by an arbitral
     tribunal composed of three arbitrators, at least one of whom shall be an
     attorney experienced in corporate transactions, appointed by agreement of
     the parties in accordance with said Rules. In the event the parties fail
     to agree upon a panel of arbitrators from the first list of potential
     arbitrators proposed by the AAA, the AAA will submit a second list in
     accordance with said Rules. In the event the parties

                                      50
<PAGE>

     shall have failed to agree upon a full panel of arbitrators from said
     second list, any remaining arbitrators to be selected shall be appointed
     by the AAA in accordance with said Rules. If, at the time of the
     arbitration, the parties agree in writing to submit the dispute to a
     single arbitrator, said single arbitrator shall be appointed by agreement
     of the parties in accordance with the foregoing procedure, or, failing
     such agreement, by the AAA in accordance with said Rules. The foregoing
     arbitration proceedings may be commenced by any party by notice to the
     other parties and shall take place at a location as shall be agreed by the
     parties to the arbitration. In connection with any such arbitration, the
     arbitrator(s) shall be empowered to consider the attorney's fees and
     expenses as an element of such party's damages.

          (b) The Parties hereby exclude any right of appeal to any court on
     the merits of the dispute. The provisions of this Section 10.10 may be
     enforced in any court having jurisdiction over the award or any of the
     parties or any of their respective assets, and judgment on the award
     (including, without limitation, equitable remedies) granted in any
     arbitration hereunder may be entered in any such court. Nothing contained
     in this Section 10.10 shall prevent any party from seeking interim
     measures of protection in the form of pre-award attachment of assets or
     preliminary or temporary equitable relief.

          (c) Each of the Parties acknowledges and agrees that the other Party
     would be damaged irreparably in the event any of the provisions of this
     Section 5 are not performed in accordance with their specific terms or
     otherwise are breached. Accordingly, notwithstanding the foregoing
     provisions of this Section 10.10, each of the Sellers, on the one hand,
     and the Buyer, on the other hand, shall be entitled to an injunction or
     injunctions, without the posting of any bond, to prevent breaches of the
     provisions of Section 5 and to enforce specifically the terms and
     provisions of Section 5 in any action instituted in any court of the
     United States or any state thereof having jurisdiction over the Parties
     and the matter in addition to any other remedy to which it may be
     entitled, at law or in equity.

     11.11. Amendments and Waivers. No amendment of any provision of this
Agreement shall be valid unless the same shall be in writing and signed by each
of the Parties. No waiver by any Party of any default, misrepresentation, or
breach of warranty or covenant hereunder, whether intentional or not, shall be
deemed to extend to any prior or subsequent default, misrepresentation, or
breach of warranty or covenant hereunder or affect in any way any rights
arising by virtue of any prior or subsequent such occurrence.

     11.12. Severability. Any term or provision of this Agreement that is
invalid or unenforceable in any situation in any jurisdiction shall not affect
the validity or enforceability of the remaining terms and provisions hereof or
the validity or enforceability of the offending term or provision in any other
situation or in any other jurisdiction.

                                      51
<PAGE>


     11.13. Expenses. Each of the Buyer, the Company and the Sellers will bear
his or its own costs and expenses (including legal and accounting fees and
expenses and, in the case of the Buyer, fees in connection with required
filings under the Hart-Scott-Rodino Act) in connection with this Agreement and
the transactions contemplated hereby. The Sellers represent and warrant to the
Buyer that Hillyer & Irwin, PC has been retained by the Company to represent
the Company and certain of the Sellers (at the expense of the Company) in
connection with the transactions contemplated hereby and that the Company will
incur no other costs or expenses (including legal and accounting fees and
expenses), directly or indirectly, in connection with this Agreement and the
transactions contemplated hereby.

     11.14. Construction. The Parties have participated jointly in the
negotiation and drafting of this Agreement. In the event an ambiguity or
question of intent or interpretation arises, this Agreement shall be construed
as if drafted jointly by the Parties and no presumption or burden of proof
shall arise favoring or disfavoring any Party by virtue of the authorship of
any of the provisions of this Agreement. Any reference to any federal, state,
local, or foreign statute or law shall be deemed also to refer to all rules and
regulations promulgated thereunder, unless the context requires otherwise. The
word "including" shall mean including without limitation. Nothing in the
Disclosure Schedule shall be deemed adequate to disclose an exception to a
representation or warranty made herein unless the Disclosure Schedule
identifies the exception with particularity and describes the relevant facts in
detail. Without limiting the generality of the foregoing, the mere listing (or
inclusion of a copy) of a document or other item shall not be deemed adequate
to disclose an exception to a representation or warranty made herein (unless
the representation or warranty has to do with the existence of the document or
other item itself). The Parties intend that each representation, warranty and
covenant contained herein shall have independent significance. If any Party has
breached any representation, warranty, or covenant contained herein in any
respect, the fact that there exists another representation, warranty, or
covenant relating to the same subject matter (regardless of the relative levels
of specificity) which the Party has not breached shall not detract from or
mitigate the fact that the Party is in breach of the first representation,
warranty, or covenant.

     11.15. Incorporation of Exhibits and Schedules. The Exhibits and the
Disclosure Schedule identified in this Agreement and the other certificates and
instruments to be delivered in connection with this Agreement are incorporated
herein by reference and made a part hereof.


                                      52
<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999



     IN WITNESS WHEREOF, the Parties hereto have executed this Agreement on the
date first above written.


THE BUYER:                          CHARLES RIVER LABORATORIES, INC.


                                    By:____________________________
                                       Name:
                                       Title:


THE COMPANY:                        SBI HOLDINGS, INC.


                                    By:____________________________
                                       Name:
                                       Title:


THE SELLERS:


                                    -------------------------------
                                         Jean M. Bees
                                         14225 Wind River Lane East
                                         Reno, NV 89511


                                    -------------------------------
                                         Donna Eisenhauer
                                         4055 Mustang Court
                                         Reno, NV 89502


                                    -------------------------------
                                         Nancy A. Gillett
                                         1100 Ivy Court
                                         Reno, NV 89523


<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999




                                    -------------------------------
                                         John Kapeghian
                                         14240 Via Contento Court
                                         Reno, NV 89511


                                    -------------------------------
                                         Doug Kornbrust
                                         7245 Lingfield
                                         Reno, NV 89502


                                    -------------------------------
                                         Ron Thielman
                                         6285 Desert Star Drive
                                         Las Cruces, NM 88005


                                    -------------------------------
                                         Karol Bice-Godwin
                                         6164 Chandler Drive
                                         San Diego, CA 92117


                                    -------------------------------
                                         Martin Brett
                                         11222 Woodlush Court
                                         San Diego, CA 92128


                                    -------------------------------
                                         William C. Hobson
                                         --------------------
                                         --------------------
<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999


                                    -------------------------------
                                         Azim Khamisa
                                         --------------------
                                         --------------------


                                    -------------------------------
                                         Glen Elliott
                                         --------------------
                                         --------------------


                                    -------------------------------
                                         Dave McCaslin
                                         --------------------
                                         --------------------


                                    -------------------------------
                                         Mark Young
                                         --------------------
                                         --------------------


                                    -------------------------------
                                         Gary Chellman
                                         --------------------
                                         --------------------
<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999


                                    THE FULLER FAMILY JOINT REVOCABLE
                                    INTER-VIVOS TRUST


                                    By:____________________________
                                    Name:    Belinda Fuller
                                    Title:   Trustee
                                    Address: 5204 Palo Alto Circle
                                             Sparks, NV 89436

                                    GILLIKIN LIVING TRUST


                                    By:____________________________
                                    Name:    Phyllis C. Gillikin
                                    Title:   Trustee
                                    Address: 5177 Aspen View
                                             Reno, NV 89523


                                    WILIIAM C. HOBSON AND/OR MARY BETH
                                    HUSEMOLLER 1998 REVOCABLE TRUST


                                    By:____________________________
                                    Name:    William C. Hobson
                                             and/or
                                             Mary Beth Husemoller
                                    Title:   Trustee
                                    Address: 14185 Powder River Drive
                                             Reno, NV 89511
<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999




                                    EMERALD K GISS TRUST dated May 13, 1999


                                    By:____________________________
                                    Name:    Nancy G. Saunders
                                    Title:   Trustee
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123




                                    By:____________________________
                                    Name:    Gary E. Giss, as custodian for
                                             Lisa N. Giss under the Virginia
                                             Uniform Transfers to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    By:____________________________
                                    Name:    Gary E. Giss, as custodian for
                                             Julie E. Giss under the Virginia
                                             Uniform Transfers to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    -------------------------------
                                             Barbara J. Giss
                                             c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123
<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999




                                    --------------------------------
                                            Gary E. Giss
                                            c/o Cheryl Ann Anderson
                                            3608 Woodland Trail
                                            Eagan, MN  55123



                                    --------------------------------
Kent Vincent Anderson
                                            c/o Cheryl Ann Anderson
                                            3608 Woodland Trail
                                            Eagan, MN  55123



                                    By:____________________________
                                    Name:   Cheryl Ann Anderson, as custodian
                                            for Michelle Suzanne Anderson
                                            under the Virginia Uniform Transfers
                                            to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    By:____________________________
                                    Name:   Cheryl Ann Anderson, as custodian
                                            for Jennifer Lynn Anderson
                                            under the Virginia Uniform Transfers
                                            to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999



                                    ---------------------------------
                                             Cheryl Giss Anderson
                                             c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    By:____________________________
                                    Name:    Diane G. Probus, as custodian
                                             for Ryan D. Probus under the
                                             Virginia Uniform Transfers
                                             to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    By:____________________________
                                    Name:    Diane G. Probus, as custodian
                                             for Kathryn A. Probus under the
                                             Virginia Uniform Transfers
                                             to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123


<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999




                                    By:____________________________
                                    Name:    Diane G. Probus, as custodian
                                             for Aaron D. Probus under the
                                             Virginia Uniform Transfers
                                             to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    By:____________________________
                                    Name:    Diane G. Probus, as custodian
                                             for Stephen P. Probus under the
                                             Virginia Uniform Transfers
                                             to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    ---------------------------------
                                             Diane G. Probus
                                             c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    ---------------------------------
                                             Michael W. Saunders
                                             c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123

<PAGE>


                                                Charles River Laboratories/SBI
                                                          Amended and Restated
                                                      Stock Purchase Agreement
                                                             September 4, 1999




                                    By:____________________________
                                    Name:    Michael W. Saunders, as custodian
                                             for Jacob E. Saunders under the
                                             Virginia Uniform Transfers
                                             to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    By:____________________________
                                    Name:    Michael W. Saunders, as custodian
                                             for Matthew W. Saunders under the
                                             Virginia Uniform Transfers
                                             to Minors Act
                                    Address: c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123



                                    ---------------------------------
                                             Nancy G. Saunders
                                             c/o Cheryl Ann Anderson
                                             3608 Woodland Trail
                                             Eagan, MN  55123


<PAGE>


                                                                     Exhibit 2.1

                                                                       Number of
Seller                                                                  Shares
- -------------------------------------------------------------------------------
Jean M. Bees                                                            184,000
(options)                                                                10,000
Donna Eisenhauer                                                         42,300
Nancy A. Gillett                                                        250,000
(options)                                                                10,000
John Kapeghian                                                           40,000
(options)                                                                95,000
Doug Kornbrust                                                          515,000
(options)                                                                10,000
Ron Thielman                                                            100,000
Karol Bice-Godwin                                                        11,062
(options)                                                                16,593
Martin Brett                                                              9,219
(options)                                                                 8,296
William C. Hobson (options)                                              25,000
Azim Khamisa (options)                                                  140,000
Glen Elliott (options)                                                   30,000
Dave McCaslin (options)                                                 110,623
Mark Young (options)                                                      2,765
Gary Chellman (options)                                                  75,000
The Fuller Family Joint Revocable Inter-Vivos Trust                     331,000
Gillikin Living Trust                                                    20,000
William C. Hobson and/or Mary Beth Husemoller 1998 Revocable Trust      650,000
Emerald K. Giss Trust                                                    18,339
Gary E. Giss, as custodian for Lisa N. Giss                               3,333
Gary E. Giss, as custodian for Julie E. Giss                              3,333
Barbara J. Giss                                                           3,333
Gary E. Giss                                                              3,333
Kent Vincent Anderson                                                     3,333
Cheryl Ann Anderson, as custodian for Michelle Suzanne Anderson           3,333
Cheryl Ann Anderson, as custodian for Jennifer Lynn Anderson              3,333
Cheryl Giss Anderson                                                      3,333
Diane G. Probus, as custodian for Ryan D. Probus                          3,333
Diane G. Probus, as custodian for Kathryn A. Probus                       3,333
Diane G. Probus, as custodian for Aaron D. Probus                         3,333
Diane G. Probus, as custodian for Stephen P. Probus                       3,333
Diane G. Probus                                                           3,333
Michael W. Saunders                                                       3,333
Michael W. Saunders, as custodian for Jacob E. Saunders                   3,333
Michael W. Saunders, as custodian for Matthew W. Saunders                 3,333
Nancy G. Saunders                                                         3,333





<PAGE>


                                                                    Exhibit 2.3

                             Target Working Capital

Cash                                             201,000
A/R                                            2,400,000
Inventory                                        618,000
Prepaid                                          145,000
                                            ------------

Sub Total                                      3,364,000


Accounts Payable                                 805,440
Vacation                                         302,148
P/R Taxes                                        159,382
CA Tax                                             8,059
Misc. Accrual                                     95,000
LOC                                              849,000
                                            ------------

Sub Total                                      2,219,029


Target Working Capital                         1,144,971



<PAGE>


                                                                    Schedule 9.2

                                  Indemnitors


          Indemnator                                         Amount
          ----------                                         ------
William Hobson
Jean Bees
Doug Kornbrust
Nancy Gillett
Dave McCaslin
Karol Bice-Godwin
John Kapeghian
                Total                                      $7,500,000


                                                                   EXHIBIT 10.10

                  AMENDED AND RESTATED DISTRIBUTION AGREEMENT

                                 by and among

                            CHARLES RIVER BRF, INC.

                          a Delaware (US) corporation

                                      and

                       CHARLES RIVER LABORATORIES, INC.

                         a Delaware (US) corporation,

                                      and

                           BIOCULTURE MAURITIUS LTD.

                            A Mauritius corporation





                              December 23, 1997





                                      1


<PAGE>




                  AMENDED AND RESTATED DISTRIBUTION AGREEMENT

This Amended and Restated Distribution Agreement (the "Agreement"), dated as
of the 23rd day of December, 1997, is made by and among Charles River
Laboratories, Inc., a Delaware (US) corporation ("CRL"); Charles River BRF,
Inc., a Delaware (US) corporation and a wholly-owned subsidiary of CRL; and
Bioculture Mauritius Ltd., a Mauritius corporation ("BCM"), and Owen and Mary
Ann Griffiths as related to Paragraph 12 only. For purposes of this Agreement,
references to "BRF" shall include all affiliates of BRF, including, without
limitation, CRL and Shamrock (Great Britain) Ltd.

WHEREAS, BCM, under the direction of the Griffiths, has been engaged for
several years in the capture, breeding and export for sale of Macaca
fascicularis, or cynomologus, primates and

WHEREAS, BRF is engaged in the breeding, import and sale of non-human primates
worldwide, as a wholly-owned subsidiary of CRL from 1978 to 1994, as an
independent not-for-profit corporation from 1994 to 1996, and again as a
wholly-owned subsidiary of CRL from 1996 to the present; and

WHEREAS, CRL and BCM entered into a Supply Agreement dated as of November 1,
1989, pursuant to which CRL acted as BCM's worldwide distributor of
Mauritius-source cynomologus primates; and

WHEREAS, CRL and BCM amended and restated the November 1989 Supply Agreement
as of June 1, 1994, in order to, among other things, extend its terms and add
BRF as a party; and

WHEREAS, BCM and CRL/BRF wish to amend and restate the June 1994 Distribution
Agreement in order to, among other things, further extend its term.

NOW, THEREFORE, for good and valuable consideration the parties intending to be
legally bound, hereby agree as follows:

1.       Term

         a. This Agreement will commence on the date hereof and shall continue
         until December 31, 2005 (as such term may be extended pursuant to
         Paragraph 1 (b) below, the "Term").

         b. Unless BRF or BCM has been previously notified that it is in
         material breach of this Agreement and such breach has not been cured
         or waived, this Agreement as it relates to all areas of the world,
         shall automatically renew for one additional five-year period, with
         exception to the specific reference of clause 12. Should the parties
         determine that the price adjustment mechanism set forth in Paragraph
         5 below has not yielded prices which accurately reflect the market
         price for Mauritian cynomologus primates at the time of renewal, then
         BCM and BRF shall negotiate in good faith to


                                       2


<PAGE>



         establish an alternate pricing schedule for use in the renewal
         period, which shall take into consideration then-current market
         conditions. In establishing such an alternate pricing schedule, the
         parties shall take into account the value of medical, conditioning,
         quarantine, marketing and other services provided by BRF in
         connection with BRF's worldwide distribution of primates sourced
         from BCM and the value of breeding, medical, conditioning,
         quarantine, export and other services provided by BCM, as well as
         evidence of the then prevailing wholesale and retail world market
         price for Macaca fascicularis.

         c. In connection with any renewal of this Agreement, BCM and BRF
         shall negotiate in good faith to establish annual minimum purchase
         and supply requirements applicable to the renewal period, which will
         be binding on the parties. The new minimums will be set on the basis
         of: (a) BCM's ability to produce, (b) World demand, (c) BRF's market
         share.

         d. Notwithstanding the provisions of Paragraph 1(a) and 1(b) hereof,
         BCM agrees to provide sufficient quantities of Qualified Primates to
         BRF in a period beyond the term hereof to allow BRF to meet all of
         its obligations to its contract customers, and the terms and
         conditions of this agreement shall govern the sale of such primates
         until BRF's obligations to its contract customers are satisfied in
         full. For purposes of this agreement "Contract Customers" refers to
         those customers who enter into agreements with BRF or CRL for the
         purchase of Mauritius source cynomo1gus primates on or before
         December 31, 2005 and those additional customers who enter into
         similar agreements with BRF after December 31, 2005 with the consent
         of BCM. No contracts between BRF and its affiliates will be eligible
         to be treated as agreements with Contract Customers under this
         paragraph without the consent of BCM. Proof of the existence of any
         agreements with Contract Customers shall be provided to BCM at BCM's
         request. The contracts listed on Schedule 1(d) are hereby irrevocably
         designated as Customer Contracts by BCM as of the date of this
         Agreement and shall be treated as such throughout the Term,

2.       Commitment to Purchase

         a. Subject to Paragraph 2(b) and 2(c) below, BRF hereby commits to
         purchase from BCM, and BCM hereby agrees to supply to BRF, during
         each calendar year included in the initial Term, the number of
         "Qualified Primates" specified on Exhibit A hereto (in each case, the
         "Annual Minimum"). In the event (i) BRF elects, at its discretion, to
         purchase Qualified Primates during any calendar year included in the
         Term and to hold such Qualified Primates in inventory for sale in the
         subsequent calendar year and (ii) such purchases are in excess of the
         Annual Minimum, in the year of purchase from BCM, then the number of
         Qualified Primates so purchased may be applied against BRF's Annual
         Minimum for the subsequent year as if those purchases were made in
         the subsequent year, provided that BRF gives BCM notice of the number
         of animals so applied at the time of the order, and provided BCM is
         in agreement, such agreement not to be unreasonably withheld. If BCM
         withholds agreement, then such


                                      3


<PAGE>



         animals shall not count against the following years minimums. For
         purposes of this Agreement, the term "Qualified Primates" refers to
         purpose-bred cynomologus Primates, to be made available by BCM, which
         meet the following health, age and weight requirements, which are
         detailed more specifically in the standard operating procedures
         referenced in Paragraph 9 below:

              (i) Herpes B-virus free (by any and all available tests)

             (ii) Good general health (as evidenced by a thorough physical
                  examination performed by a qualified veterinarian no more
                  than two weeks prior to shipment)

            (iii) No tuberculosis

             (iv) No Simian AIDS (SIV, STLV-1, or any SRV serotype)

              (v) Screened for Shigella and salmonella.

             (vi) No apparent sign of respiratory disease.

            (vii) Currently vaccinated for tetanus and measles (unless a
                  specific request is made not to vaccinate).

           (viii) Minimum weight of 2.0 kilograms and maximum weight of 5.0 kg.

             (ix) No clinical signs of enteritis, hepatitis, malaria, or any
                  other disease.

             (x)  Screened and treated for internal and external parasites

             (xi) No apparent physical deformities,

         Health reports shall accompany each animal shipment documenting
         specific examinations and testing procedures to meet the health
         requirements as set forth herein. Such examinations shall include a
         thorough pre-shipment examination during the time that primates are
         housed in single cages involving, among other things, an oral
         examination.

         b. Subject to Paragraph 2(c) below, BRF hereby agrees to purchase no
         less than 20 % of its Annual Minimum for a given calendar year during
         the first three (3) months of such year, and sufficient quantity in
         the second three (3) month period such that in the first six months
         BRF will have purchased not less than 40% of its Annual Minimum. In
         calculating whether or not this target has been reached in the first
         two periods of three months each, the Dollar value of ferals
         purchased may be taken into consideration. However on an annual basis
         ferals may not be taken into consideration in terms of BRF's
         commitment to purchase the Annual Minimums. If BRF fails to meet 80%
         of it purchase requirement during any one of these periods or does
         not purchase 80% of its Annual Minimum during the applicable calendar
         year, then BCM shall be free to sell the number of Qualified Primates
         not purchased in each case, (the "Released Amount"), but no more, to
         third-party purchasers. In this event BCM shall thereafter have the
         right to make available to third-party purchasers a number of
         Qualified Primates equal to the Released Amount during each of the
         successive calendar years included in the Term, so long as BCM is not
         then in default under this Agreement and BRF's Annual Minimum shall be
         correspondingly reduced by the Released Amount, provided however,
         that in no event will BCM fail to keep in stock a


                                       4


<PAGE>



         number of Qualified Primates meeting the age, health, weight and
         other specifications necessary for BRF to meet its on-going
         obligations under all customer contracts with its Contract Customers
         identified pursuant to Paragraph 1(d) throughout the Term. BCM shall
         not have this right to do any of the foregoing in the event that
         BRF's failure to meet its purchase requirements is due to BCM's
         inability to fill orders for Qualified Primates or due to reasons
         beyond BRF's control (e.g. air embargoes or government action).
         Enforcement of this Paragraph 2(b) shall be BCM's sole remedy in the
         event BRF elects not to purchase its annual minimums hereunder,

         c. BCM understands and agrees that it is essential for BRF to be able
         to supply its primate customers with Qualified Primates of various
         age and weight ranges in order to meet their respective research
         needs. Consequently, BCM agrees on a best-effort basis, that it will
         make Qualified Primates available to BRF at ages and body weights
         distributed throughout the weight range specified in Paragraph 2 (a).
         BCM further guarantees a male-to-female ratio of approximately 50/50
         among Qualified Primates. Furthermore, BRF agrees that in each
         calendar year total orders of Qualified Primates will be in an equal
         sex ratio.

         d. Given BCM's requirement by the UK home office to develop breeding
         with captive bred (Fl) breeding stock, additional excess male
         primates may become available for sale. In the event such excess
         animals become available, BCM shall give BRF written notice of its
         intention to sell such animals and BRF shall have sixty (60) days to
         commit to purchase all or a portion of such animals at a price to be
         negotiated between BRF and BCM, which price shall not be higher than
         the price for Qualified Primates hereunder. Any excess animals so
         purchased shall be credited against the Annual Minimum for the
         applicable year. In the event BRF does not commit to purchase all the
         excess animals offered by BCM, BCM shall have the right to sell the
         unpurchased portion of such animals to a Qualified Distributor (as
         hereinafter defined) at a price equal to or greater than the price
         offered to BRF. At BRF's request, BCM shall provide BRF with
         documentation sufficient to establish, to BRF's satisfaction, the
         purchase price paid by any Qualified Distributor for excess animals
         offered pursuant to this Paragraph 2(d) and the identity of such
         Qualified Distributor.

         e. If at any time BRF desires to increase the number of Qualified
         Primates BCM guarantees to supply hereunder, BRF shall so notify BCM,
         and the parties agree to re-negotiate in good faith an increase in
         the Annual Minimum for each calendar year remaining in the Term.

         f. If BRF fails to purchase the minimums for three consecutive years,
         for (i) reasons other than BCM's inability to deliver Qualified
         Primates ordered by BRF or (ii) without the prior approval of BCM
         then BCM has the right to cancel this agreement. BCM may exercise
         this right at any time subsequent to these three years upon three
         months prior written notice, and failure to exercise this right by
         BCM in any one year is not to be construed as a waiver of this
         right.


                                      5


<PAGE>



         g. BRF will promote BCM as a supplier in its marketing efforts,
         including trade show exhibits referencing BCM. BRF will give BCM at
         least as much prominence as it does to any other suppliers in its
         marketing efforts. In order to permit BRF to undertake such marketing
         efforts, BCM shall, at its own cost and expense, prepare a quality
         brochure in sufficient quantities for use by BRF.

         h. The parties agree that BRF may, under certain circumstances, find
         it necessary for BCM to house Qualified Primates purchased by BRF at
         BCM's facilities pending delivery. BCM and BRF agree to negotiate in
         good-faith regarding the per-unit per diem charges to be applied
         under such circumstances, and BCM agrees to use its best efforts to
         accommodate such Qualified Primates if so requested by BRF.

3.       Sales of Feral Primates

         a. Throughout the term of this Agreement BRF shall have the right,
         but not the obligation, to purchase feral cynomologus primates
         ("Feral Primates") from BCM at the per-unit purchase prices specified
         in Paragraph 5 below. All such Feral Primates shall meet each of the
         health and testing requirements outlined in Paragraph 2(a) above and
         shall be accompanied by documentation in the same manner as Qualified
         Primates, except that the upper weight range will be restricted to 6
         kilograms. Animals in excess of 6 kilograms will be accepted only
         with the prior consent of BRF.

         b. In addition. to whatever rights BRF may have pursuant to Paragraph
         3(a) above, BCM shall, prior to the sale by it from time to time of
         any Feral Primates to a Qualified Distributor (as hereinafter
         defined), offer to BRF by written notice (the "Offer") the right, for
         a period of sixty (60) days, to purchase all or a portion of the
         Feral Primates then offered, at the purchase price specified in
         Paragraph 5 below.

         c. The offer shall describe the characteristics of the Feral Primates
         being offered, and shall specify the number of Feral Primates to be
         made available for sale. BRF may accept BCM's offer for all or any
         portion of the Feral Primates offered by written notice of acceptance
         (the "Acceptance"), given to BCM prior to the expiration of the
         sixty-day notice period, in which case BCM shall sell, and BRF shall
         purchase that number of Feral Primates agreed to be purchased by BRF
         in the Acceptance.

         BCM shall be free at any time after the sixty-day notice period to
         offer and sell to any Qualified Distributor the number of Feral
         Primates not agreed to be purchased by BRF in the Acceptance, but
         only at a price which is not less than the price available to BRF. At
         BRF's request, BCM shall provide BRF with documentation sufficient to
         establish, to BRF's satisfaction, the purchase price paid by any
         Qualified Distributor for Feral Primates offered pursuant to this
         Paragraph 3(b) and the identity of such Qualified Distributor. For
         the purpose of this agreement, Qualified Distributor shall be those
         distributors of primates which BRF and BCM mutually agree in writing
         have the qualifications and reputation that will serve to enhance the
         reputation of Mauritian cynomolgus primates around the world.


                                       6


<PAGE>



         d. Throughout the term, BCM agrees, on behalf of itself and its
         joint-venture partners, to sell feral Primates only to Qualified
         Distributors and that the price charged by BCM for any Feral Primates
         which may be sold during the Tenn of this Agreement shall in no event
         be less than the price available to BRF.

         e. If BCM is dissatisfied with the level of sales of Feral Primates
         in Belgium and France, then BCM shall provide BRF with written
         notice of its dissatisfaction. BRF shall have thirty days to satisfy
         BCM that it has taken all reasonable actions to service the French
         and Belgium markets with Feral Primates. If BRF fails to so satisfy
         BCM within this thirty-day period, BCM shall have the right to sell
         Feral Primates into France and Belgium without providing BRF with a
         right of first refusal.

4.       Dedicated Primate Production: Guaranteed fSupply

         a. BCM on behalf of itself and its joint-venture partners, hereby
         agrees to make available annually, out of those primates expected to
         be produced by BCM and its joint-venture partners during the Term a
         minimum of 5,000 primates (the "Dedicated Production Amount"). Such
         Dedicated Production Amount shall at all times be reserved
         exclusively for purchase by BRF and shall not be made available to
         third parties without the express written consent of BRF unless BRF
         has not taken minimums as per clause 2.

         b. The parties agree that the Dedication Production Amount shall
         consist of both Qualified Primates and other purpose-bred cynomologus
         primates which are available for purchase from BCM, but which do not
         meet the criteria set forth in Paragraph 2(a) above ("Non-Qualified
         Primates"). BRF may, in its sole discretion, purchase Non-Qualified
         Primates from BCM, in which event purchase of such Non-Qualified
         Primates shall be counted against CRL's Annual Minimum.

5.       Pricing

         a. BRF shall pay to BCM the following firm and fixed US Dollar prices
         (in each case, the "Prices") during 1998 (i.e., January 1, 1998
         through December 31, 1998): (i) all Feral Primates (regardless of
         weight), $546 each, and (ii) Qualified Primates, up to 2.9 kilograms
         in weight, $1308 for BRF/Houston (US) and $1283 for Shamrock/UK, with
         said Price for Qualified Primates increasing in equal increments of
         $55 above the aforementioned US and UK base prices for each 250 gram
         increase in weight above 3.0 kilograms (for example, the 1998 prices
         for Qualified Primates in the US and UK weighing between 3.0 and 3.25
         kilograms shall be $1363 and $1338, respectively). BRF shall pay to
         BCM US $620 each for feral primates purchased during calendar year
         1999.

                                       7


<PAGE>



         b. The prices set forth above shall remain in effect through the
         period specified. Thereafter, revised Prices will be established for
         each subsequent calendar year thirty (30) days prior to the
         commencement of such year based on BRF's annual percentage price
         increase for Feral Primates and Qualified Primates of various weights
         and ages, as reflected in BRF's most recent price list (whether
         publicly circulated or used internally) (in each case, the 'Annual
         Percentage Price Increase'), such that the price paid to BCM
         hereunder, shall in each case, be increased by a percentage which
         equals the Annual Percentage Price increase. BRF shall make available
         to BCM at the beginning of each year its annual price list for
         primates. For the purpose of this clause, the 'BRF Price List' will
         be the generally released BRF price list minus any trade or quantity
         discounts. That is the actual price payable by BRF's customers which
         is to be taken to be the price of Mauritian Qualified Primates, for
         the purpose of this clause. BRF is to make available to BCM details
         of quantities sold at various prices during the year so the average
         selling price for the year can be established.

         c. In the event BRF's or BCM's cost of doing business is
         substantially increased, (for example as a result of airline
         embargoes, government action or legislation or dramatically changed
         exchange rates) which increase cost is also being incurred generally
         by commercial primate distributors, in the case of BRF and by
         commercial primate suppliers, in the case of BCM, the parties agree
         to renegotiate in good faith the prices hereunder to adequately
         reflect such increased costs.

         d. The prices set forth above are inclusive of all tests and
         conditioning carried out in Mauritius, including Salmonella and
         Shigella tests.

         e. BRF shall pay to BCM per diems for all Feral and Qualified
         Primates held by BCM at BRF's direction and for BRF's (or BRF's
         customers') account. The per diem rate for 1998 shall be $1.10 per
         animal boarded, regardless of weight, age or feral/bred origin. The
         maximum number of animals for which BRF may request boarding at any
         one time BCM shall be 600. While title and risk of loss of animals
         boarded by BCM shall remain with BCM, BRF shall otherwise assure BCM
         that BRF will take ownership at some later date of all animals placed
         on boarding. At BRF's option, either BRF or BCM shall obtain
         insurance on the animals held on per them at BCM, in an amount equal
         to BRF's selling price therefor. In the event that BRF requests BCM
         to obtain insurance, said insurance shall be with a reputable and
         financially secure Mauritian insurance company approved by BRF, in
         the name of both BRF and BCM, with the proceeds from any loss claim
         payable to BRF. The cost of insurance of animals held on per diem for
         BRF's (or BRF's customers' account) shall in any case be borne
         entirely by BRF.

6.       Forecasts and Orders

         a. Within ten (10) business days of the date hereof, and on the
         10th day following the close of each calendar quarter included in the
         Term, BRF shall provide BCM with a


                                       8


<PAGE>



         rolling twelve-month forecast of its anticipated purchase
         requirements, with information provided on a quarterly basis. Such
         forecasts are intended to assist BCM in its planning process and
         shall not obligate BRF to purchase any primate from BCM in excess of
         the applicable Annual Minimum. However, BCM shall use its best
         efforts to make available those Qualified Primates necessary to meet
         BRF's forecast supply requirements. BCM shall on at least a monthly
         basis, inform BRF in writing of its primate stock on hand (with
         reference to age, sex, weight, and health status), and shall
         otherwise use its best efforts to assist BRF in preparing its
         forecasts.

         b. BRF shall order primates from BCM by submitting standard purchase
         orders ('Orders') to BCM, Orders are to be executed by BRF and
         acknowledged in a signed writing by BCM, and such Orders and
         acknowledgments will become an integral pan of this Agreement.
         Shipment terms, including delivery dates, will be specified by BRF in
         each Order.

         c. This Agreement and the terms of BRF's Orders shall exclusively
         govern the purchase and sale of any Primates from BCM. In no event
         shall BCM's standard terms and conditions of sale as set forth in its
         acknowledgment or other sales documentation be applicable to the
         Purchase and sale of primates, unless and to the extent such terms
         and conditions are fully consistent with or in furtherance of the
         terms and conditions set forth in this Agreement and BRF's Orders.

7.       Terms of Sale

         BRF will pay the prices for any primates purchased from BCM net
         thirty days. BRF will be responsible for the costs of transporting
         primates purchased to their ultimate destination, as well as any
         sales, use, excise or similar taxes imposed by the government of
         Mauritius (but excluding any conservation tax (currently US $50 per
         primate exported).

8.       Delivery and Acceptance

         a. Delivery shall be FOB Mauritius with all freight expenses being
         paid by BRF upon delivery. Title to and general risk of loss of
         primates purchased by BRF shall pass to BRF at the time of delivery
         to the initial customs airport in the country of destination.
         Promptly following delivery, BCM shall invoice for all of the
         primates tendered.

         b. Each primate shipped under this Agreement shall be deemed accepted
         by BRF within thirty (30) days following delivery to the initial
         customs airport in the country of destination. Acceptance shall
         not be deemed to occur, however, if prior to the expiration of such
         period BRF informs BCM in accordance with Paragraph 9 that the BCM
         product warranty (as described in Paragraph 9) has not been fully
         satisfied for any such primate.


                                      9


<PAGE>



9.       Product Warranty

         a. BCM warrants that each delivered Qualified Primate will meet all
         of the health, age and weight requirements set forth in Paragraph 2,
         or in any Order from BRF if the parties agree the requirements in the
         Order shall apply.

         b. BCM warrants that each delivered Feral or Non-Qualified Primate
         will meet only those health, age and weight requirements set forth in
         the applicable offer.

         c. The foregoing warranties shall be subject to BRF's handling and
         maintaining any primates received from BCM in accordance with
         generally accepted procedures for the handling of non-human primates.

         d. Upon notification of a defect by BRF within the respective
         acceptance periods set forth in Paragraph 8(b) resulting in a severe
         illness/mortality (naturally or by action of a BRF veterinarian in
         accordance with BRF's standard veterinary protocols) of the defective
         primate, BRF shall be entitled to deduct from its invoice the unit
         price of said defective primate, and the cost of its transport.
         However, BCM shall have the right to have an independent mutually
         acceptable veterinarian verify any such defect notification by BRF at
         BCM's sole expense.

         e. Except for the remedy set forth in Paragraph 8(b) and 9(d), BCM
         shall not otherwise be liable for damages to BRF or to BRF's
         customers, following on from the supply of such a defective primate.

10.      Management of BCM Primate Operation,

         BCM's primate operations, and the operations of its joint-venture
         partners, shall be conducted in accordance with the standard operating
         procedures attached as Appendix 1 hereto (the "SOPs"), which have
         been amended as of this date by mutual agreement of the parties. The
         SOPs have been mutually developed by BRF and BCM and the parties
         agree am implementation of and continuing conformance to the SOPs by
         BCM and its joint-venture partners is an important part of this
         Agreement.

         In particular, the obligation to physically separate feral and bred
         primate colonies in the manner specified in the SOPs is a critical
         component of the SOPs and BCM must use its best endeavors to meet
         this obligation during the Term. Appendix I may be further amended
         from time to time during the Term upon mutual written agreement of
         the parties,

11.      Inspection and Audit

         a. BRF shall have the right, during normal business hours, to inspect
         BCM's facilities for the purpose of observing production and
         maintenance activities, and auditing BCM's production records to
         ensure compliance with this Agreement, in each


                                      10


<PAGE>



         case upon at least seventy-two (72) hours advance notice. For
         purposes of this Paragraph 11, "production records" shall include all
         operational documents (other than financial statements) relating to
         the day-to-day business of BCM (including, without limitation,
         inventory, veterinary and health records and worldwide export
         figures), where such records relate directly to BCM's distribution
         arrangement with BRF

         b. In addition to the inspection rights granted in Paragraph 11(a),
         throughout the Term, should BRF so request, BCM shall provide BRF
         with a half-yearly report, prepared by BCM's qualified independent
         auditor, which report shall be limited to stating whether BCM, as a
         corporation, is a viable on-going concern, and in good or other
         financial situation.

         Such reports shall be prepared on the basis of six-month periods and
         each shall be delivered to BRF as soon as possible after the auditors
         have examined the books of BCM. BRF hereby agrees to treat all such
         reports as confidential information, BRF will provide BCM with a copy
         each year of a Report by its qualified independent auditor, which
         report shall be limited to stating whether BRF, as a corporation is a
         viable on-going concern, and in good or other financial situation.

         c. In order to permit the parties of this agreement to be continually
         updated on each other's on-going operations, BCM and BRF agree to
         meet and conduct biennial reviews of their respective primate
         operations throughout the Term. Such biennial business reviews will
         be scheduled on dates which are mutually convenient for the parties
         attending, with reviews being scheduled such that one review takes
         place in Mauritius and the other in either the United States or
         London. Each of the parties shall bear the costs and expenses
         associated with its representatives attending any business review.

12.      Employment and Non-Competition

         BCM agrees to continue to employ the Griffiths throughout the Term
         (unless they become unfit to carry out their job). During the Term
         and for a period of three (3) years thereafter, each of the Griffiths
         further agrees not to engage, directly or indirectly, as a supplier
         or consultant to, or an employee, officer, director, stockholder,
         partner or other owner or participant in, or lend his or her name to
         any business entity in activities anywhere in the world which utilize
         or involve Mauritius primates in competition with the primate
         business then conducted by BCM or BRF with the specific exception of
         BFC Ltd in Israel, provided BRF is not in material breach of the
         agreement at the time, or fails to renew the agreement. However this
         clause is not to be included in the automatic renewal period except
         if Mary Ann and Owen Griffiths are still associated with or employed
         by BCM at that time.

13.      Breeding and Competition by BRF


                                      11


<PAGE>



         a. BCM expressly acknowledges and agrees that BRF or any subsidiary
         or related company may, but only with approval of BCM, use all or any
         portion of the Primates purchased from BCM as breeding stock for the
         establishment of one or more breeding colonies in the United States
         or elsewhere in the world.

         b. In the event BRF obtains approval from BCM during the Term to
         establish an independent venture dedicated to breeding and
         distribution of purpose-bred B-virus free cynomologus primates
         sourced from BCM, BRF agrees to offer BCM and/or the Mauritian
         shareholders of BCM the opportunity to participate as a joint-venture
         partner or equity holder in such venture, an reasonable business
         terms, provided that BCM is not in material breach of this agreement
         at the time such venture is proposed.

         c. BRF or any subsidiary or related company agrees not to
         competitively engage in the trapping, breeding or exporting of
         primates in Mauritius during the Term. However, should BCM be unable
         to meet the minimums (of captive bred monkeys) for any given year,
         BRF may purchase from other Mauritian suppliers an amount equal to
         the shortfall for that year. In addition, BRF agrees not to so
         compete in such activities with BCM in Mauritius for three (3) years
         after the end of the Term, but if and only if the failure to not
         renew or extend this Agreement shall have been solely at BRF's
         election for business reasons not covered by or resulting from the
         unreasonable actions of BCM hereunder.

14.       Restrictions on Use

         BCM is required to inform BRF that the Government of Mauritius
         prohibits the use of feral or bred primates for certain purposes.
         Accordingly, BCM has advised BRF that use of Mauritian primates for
         any of the following purposes is prohibited by Mauritian law; (i)
         munitions testing for military research; (ii) radiation (other than
         routine diagnostic x-rays); (iii) unmanned space flights; and (iv)
         vivisection that sets the animal under heavy stress or torture.

15.      Termination

         a. Either party shall have the right to terminate this Agreement
         during the Term if:

             (i) the other party fails to remedy or to commence reasonable
         corrective action to remedy any default in the performance of any
         material condition or obligation under this Agreement within thirty
         (30) days of written notice thereof; or

            (ii) the other party files a petition in bankruptcy, or enters into
         any arrangement with its creditors, or applies for and consents to
         the appointment of a receiver or trustee, or makes an assignment for
         the benefit of creditors, or suffers or permits the entry of an order
         adjudicating it to be bankrupt or insolvent.


                                      12


<PAGE>



         b. The failure of either party to terminate this Agreement by reason
         of the breach of any of its material provisions by the other party
         shall not be construed as a waiver of the rights or remedies
         available for any subsequent breach of the terms and provisions of
         this Agreement.

16.      Termination of Current Agreement

         a. Upon execution of this Agreement, the Distribution Agreement dated
         as of June 1, 1994, among CRL, BRF, BCM and the Griffiths shall
         terminate and shall have no further force or effect.

17.      Supply to Israel

         BCM hereby agrees not to supply more than a total of five hundred
         (500) female primates to Israel through delivery of animals prior to
         or during the terms of this agreement provided, however, BCM may
         contribute up to 50 additional animals per year to replace animals
         culled or dead. If not applied in one year this quantity may be
         carried forward to the subsequent year. In the event of a
         catastrophic loss of more than one hundred (100) animals, the number
         lost may be replaced in that year, such that the total of Mauritian
         source animals does not exceed 500 females.

18.      Force Majeure

         Neither party shall be responsible for any failure to comply with the
         terms of this Agreement, except for failure to make timely payments
         hereunder, where such failure is due to force majeure, which shall
         include, without limitation, cyclones, fire, flood, explosion,
         strike, labor dispute, labor shortages, picketing, lockout,
         transportation embargo or failures or delays in transportation,
         strikes or labor disputes affecting supplies, or other governments or
         any agency thereof, or judicial action, and all Government actions
         preventing the export of monkeys. The time for performance where
         delay is excusable hereunder shall be extended by a period of time
         equal to the time lost by reason of the excused delay.

19.      Expenses

         Each of the parties to this Agreement shall bear its own expenses
         (including, without limitation, all compensation and expenses of
         counsel, financial advisors, consultants and independent accountants)
         incurred in connection with the preparation and execution of this
         Agreement and consummation of the transactions contemplated herein.

20.      public Disclosure

         Each of the parties to this Agreement hereby agrees with the other
         parties that, except as may be required to comply with the
         requirements of applicable law, no press release or similar public
         announcement or communication will be made or caused to be made


                                      13


<PAGE>



         at any time whatsoever concerning the execution or performance of
         this Agreement unless specifically approved in advance by BRF and
         BCM.

21.      Notices

         Any notice or other communications required under this Agreement
         shall be in writing (including telecopy communications), and shall be
         sent by registered mail, telecopier or courier as follows:

(a)      if to BRF, addressed to:

         Charles River BRF, Inc.
         305 Almeda Genoa Road
         Houston, TX 77047, USA
         Attention: President
         Fax: (713) 433-6971

with a copy to:

(b)      Charles River Laboratories, Inc.
         251 Ballardvale Street
         Wilmington, MA 01887, USA
         Attention: General Counsel
         Fax: (508) 988-5665

(b)      if to BCM, addressed to:

         Bioculture Mauritius Ltd,
         Senneville
         Riviere des Anguilles
         Mauritius
         Attention: Mr. Owen Griffiths
                         Fax: 230-6262-844

         Any party hereto shall be entitled to specify a different address by
         giving written notice as aforesaid to the other parties. All notices
         shall be deemed to have been duly given or made when delivered
         personally, or by facsimile or upon appropriate telex confirmation or
         upon fifteen (15) business days after being deposited in the mail,
         postage prepaid.

22.      Section Headings

         The paragraph headings contained in this Agreement are for reference
         purposes only and shall not in any way affect the meaning or
         interpretation of this Agreement,


                                      14


<PAGE>



23.      Counterparts

         This Agreement may be executed in two or more counterparts, each of
         which shall be deemed to be an original, but all of which together
         shall constitute one and the same instrument.

24.      Amendment: Waiver

         This Agreement may not be amended or modified except by a written
         document duly executed by BRF and BCM. Waiver of any term of
         condition of this Agreement shall only be effective if in writing and
         shall not be construed as a waiver of any subsequent breach or waiver
         of the same term or condition, or a waiver of any other term or
         condition of this Agreement.

25.      Entire Agreement

         This Agreement (i) constitutes the entire agreement between the
         parties and supersedes all prior agreements and understandings, both
         written and oral, among the parties, with respect to the subject
         matter hereof and (ii) is not intended to confer upon any other
         persons any rights Or remedies hereunder.

26.      Saving Clause

         Should any clause or part of any clause of this Agreement be declared
         null and void, it shall not affect the validity of this Agreement or
         any other clauses contained herein, and the said other clauses will
         remain in full force and effect between the parties.


                                      15


<PAGE>



IN WITNESS WHEREOF, the parties hereto have executed this Agreement, or caused
this Agreement to be duly executed by their authorized representatives as of
the date first above written.


                                        CHARLES RIVER BRF, INC.

                                        By: /s/ Dr. Rajinder Bhalla
                                           -------------------------------------
                                            Dr. Rajinder Bhalla, President


                                        CHARLES RIVER LABORATORIES, INC.

                                        By: /s/ James C. Foster
                                           -------------------------------------
                                            James C. Foster, President


                                        BIOCULTURE MAURITIUS LTD.

                                        By: /s/ Owen Lee Griffiths
                                           -------------------------------------
                                            Owen Lee Griffiths, Director, and
                                            individually as applies to
                                            Paragraph 12 only


                                        BIOCULTURE MAURITIUS LTD.

                                        By: /s/ Mary Ann Griffiths
                                           -------------------------------------
                                            Mary Ann Griffiths, Director, and
                                            individually as applies to
                                            Paragraph 12 only


                                           /s/ Elizabeth Mary Rountree
                                           -------------------------------------
                                           Elizabeth Mary Rountree, Director



                                      16




                                                                   EXHIBIT 10.11

                      SCIENTIFIC RESOURCES INTERNATIONAL
                           and SIERRA BIOMEDICAL INC.
                               SUPPLY AGREEMENT

         This Agreement made by and between SCIENTIFIC RESOURCES INTERNATIONAL,
Ltd. (SRI), a Nevada Company having its principal offices at 1325 Airmotive
Way, Reno, Nevada 89502 and Sierra Biomedical Incorporated (SBI), located at:
587 Dunn Circle, Sparks,  NV 89431 is entered into with reference to the
following facts:

         A. SBI is a research firm which utilizes primates.

         B. SRI supplies naive primates from the People's Republic of China
and has the requisite knowledge and experience to locate and negotiate primate
sources and pricing. SRI confirms that it has a signed long term primate
supply agreement with the Yunnan Primate center of the People's Republic of
China, or it's affiliates (see attached agreement).

         NOW THEREFORE, in consideration of the premises and mutual covenants
and benefits contained herein, the parties agree as follows:

         1. Contract: SRI hereby agrees to sell primates to SBI, and SBI
hereby agrees to buy primates from SRI subject to the terms and conditions
herein set forth.

         2. Term: This Agreement shall terminate on the tenth (10th) annual
anniversary from the last date appearing on this agreement, unless sooner
terminated under the provisions of this Agreement.

         3. SBT's Duties: SBI agrees to buy primates from SRI according to
SBI's specifications, which not greatly differ from their current
specifications. SBI agrees to purchase the minimum annual number of primates
stated in this agreement and in the issued SBI purchase orders. SBI agrees to
provide written reports concerning primate deaths, quality or complaints.

         4. SRI's Duties: SRI will provide SBI with all pertinent documents
related to specific primate shipments such as; individual animal records,
CITES, animal quarantine certificates, route and contact sheets, Air Waybill,
packing lists etc.

         5. Pricing: Primate prices will be stated and agreed to in SBI's each
year's annual primate purchase order. SRI shall have the right to change
selling prices of the primates during the term hereof, with 30 days written
notice, due to the volatility of the stated marketplace. SRI's stated contract
prices to SBI will be calculated on a cost plus basis. This cost plus basis
will equal no more than a $250 markup per primate based upon SRI's purchase
prices. All SRI pricing is FOB San Francisco International Airport and thus it
is further agreed and understood that SBI, or its assignees, will collect all
SBI shipments at this port of entry (San Francisco Airport), until further
notice.

         6. Invoices and Collections: SBI will issue to SRI an annual primate
purchase order contract each October for the next calendar year's commitment.
This purchase order will state: the gross number of Rhesus and Cynomolgus
primates by sex, weight requirements, disease status requirements (untested
for B virus) etc. SRI will invoice SBI per shipment against SBI's individual
POs. SBI agrees to pay said SRI invoices according to the stated payment
terms. SRI's payment terms are: 20% upon arrival/80% net 35 days. SRI will not
charge sales or use taxes on SBI invoices since it is understood that SBI is
acting as a wholesale purchaser and will include these primates in contract
research billings, contract sales, or resell these primates to third parties,

         7. Primate Contract Quantity: SBI commits to purchase a minimum of
         800 naive primates per year. This minimum primate order will consist
of both Rhesus and Cynomolgus primates. SBI will usually require an equal
quantity of males and females per individual shipments and this specification
will be stated on their annual purchase order. SRI realizes and appreciates
the variables involved with


<PAGE>


page 2 - SRI/SRI 10 Year Agreement

SBI's primate needs, thus SRI will always attempt to deliver the mix of species,
sexes and the quantities in a timely manner. Furthermore, SBI has the first
right of refusal an SRI's annual primate supplies over and above SBI's annual
minimum commitment.

         8. Primate Quality: SRI agrees to supply SBI with Naive Primates
according to SBI's specifications as stated on their annual contract purchase
order. If a primate(s) is outside of the specification then SRI agrees to
remedy the problem to satisfy SBI and it's customer(s). For example: if a
primate(s) is unacceptably under weight then SRI agrees to discount the price
of said primate(s) or replace the primate(s) or if a primate dies or has
diseases outside of the specifications then SRI agrees to replace or discount
the price of said primate(s) with SBI's agreement. SRI confirms that if any
primates are out of specification then SRI will work with SBI to remedy the
situation to SBI's satisfaction.

         9. Termination and Penalties, if SBI terminates this agreement
without cause then SBI agrees to purchase 800 primates, as stated in this
agreement, over a period not to exceed one year from the date of termination.
If SBI terminates this agreement for cause, then the following procedure will
be followed: If a for cause problem occurs, it is agreed that SBI will notify
SRI in writing and SRI will have 60 days to redress. If the problem(s) is not
corrected, within the 60 day period, then SBI has the right to terminate this
agreement immediately without further obligation. Examples of for cause may
include the following: failure to deliver animals in a timely manner,
unacceptable animal quality and/or pricing becoming noncompetitive with other
licensed agents for equal specification animals.

         10. Future Relationships: The parties intend to jointly develop a
primate quarantine facility in the form of a joint venture which will import,
quarantine, hold and sell primates to third parties. It is believed that if
and when this joint venture occurs, that this agreement will be modified or
terminated based upon the parties new relationship and agreements.

         IN WITNESS WHEREOF the undersigned have executed this Agreement


Scientific Resources International, Limited (SRI)


By: /s/ Robert K. Pickup                Title: Managing Director
   -------------------------------
   Print name: Robert K. Pickup

Dated: 3-18
      ----------------------------


Sierra Biomedical Incorporation (SBI)


By: /s/ William Hobson                  Title: President
   -------------------------------
   Print name: William Hobson

Dated: 3-17-97      , 19
      ----------------------------



By: /s/ D. Kornbrust                  Title: Vice President
   -------------------------------
   Print name: D.. Kornbrust

Dated: 3-17-97      , 19
      ----------------------------




                  See attached SRI/Chinese Supply Agreement

                           * * End of Agreement * *


<PAGE>


                      SCIENTIFIC RESOURCES INTERNATIONAL
                              and SHARED SCI-TECH

                          PURCHASE & SUPPLY AGREEMENT

         This Agreement made by and between SCIENTIFIC RESOURCES INTERNATIONAL,
Ltd. (SRI), a Nevada Company having its principal offices at 1325 Airmotive
Way, Reno, Nevada 89502 and Shared Sci-Tech, Ltd. (SST) located at: 3918 Mead
Street, Antioch, CA 94509 is entered into with reference to the following facts:

         A. SST is an American company which represents the Yunnan Primate
Center of the Peoples Republic of China. As such, SST markets Chinese Rhesus
and Cynomolgus primates.

         B. SRI Supplies primates to American research laboratories, and has
the requisite knowledge and experience to locate and negotiate primate
sources, sales and pricing. SRI also has the knowledge and experience to
present other business opportunities to SST and/or present other parties to
SST for consul and/or working relationships.

         NOW THEREFORE, in consideration of the premises and mutual covenants
and benefits contained herein, the parties agree as follows:

         1. Contract: SST hereby agrees to sell primates to SRI, and SRI hereby
 agrees to buy SST's primates subject to the terms and conditions herein set
 forth.

         2. Term: This Agreement shall terminate on the tenth (10th) annual
anniversary from the last date appearing an this agreement, unless sooner
terminated under the provisions of this Agreement.

         3. SRI's Duties: SRI agrees to buy primates from SST according to
SRI'S specifications. SRI agrees to purchase the minimum annual number of
primates stated in this agreement and in issued SRI purchase orders. SRI
agrees to provide written reports concerning primate deaths, quality or
complaints.

         4. SST's Duties: SST will provide SRI with all pertinent documents
related to specific primate shipments such as; individual animal records,
CITES, animal quarantine certificates, route and contact Sheets, Air Waybill,
packing lists etc.

         5. Compensation: SRI further agrees to provide SST, each January, with
a purchase order(s) which equals SRI's calendar year primate required purchases.
SRI further agrees to pay SST invoices in a timely manner according to the
invoice's stated payment terms.

         6. Pricing: SST shall have the right to change selling prices of the
primates during the term, hereof, with 60 days written notice, due to the
volatility of the stated marketplace. Since SRI's contracts are long term,
and Chinese pricing can be politically volatile, again it is understood by SST
that price changes may only occur with 60 days written notice and with a
detailed explanation as to the price change. Please note: Historically China
provides advance notice of price changes and SST will always attempt to
provide as much advance notice as possible to SRI. SST's stated contract
prices will always be honored for goods shipped. All SRI purchase orders
accepted, but not yet shipped, will also be honored. Now pricing will only go
into effect after the 60 day Written notice period. Due to SRI's most
favorable customer status with SST, SST agrees to offer SRI the lowest primate
pricing possible. All SST pricing is FOB San Francisco International Airport
and thus it is further agreed and understood that SRI, or its assignees, will
'collect all shipments at this port of entry (San Francisco Airport), until
further notice.

         7. Primate Contract Quantity: SRI commits to purchase a minimum of
000 primates per year. This primate order will consist of both Rhesus and
Cynomolgus primates. SRI will require an equal quantity of males and females
per individual shipments so the annual total of 800 will be 400 male and 400
female. The mix of species is always unknown but we believe that we will
require a minimum of 600 Rhesus and 200 Cynos per year.

         8. Primate Quality: SST agrees to supply SRI with Primates according
to SRI's specifications as stated an their annual contract purchase order, if
a primate(s) is outside of the specification then sST agrees to remedy the
problem to satisfy SRI and it's customer(s). For example: if a primate(s) is
under weight then SST agrees to discount the price of said primate(s) or
replace the primate(s), or if a primate dies or has diseases outside of the
specifications then SST agrees to replace or discount the price of said
primate(s) with SRI's agreement. SST confirms that if any primates are out of
specification then SST will work with SRI remedy the situation to SRI's
satisfaction.
         9. Invoices and Collections: SST will invoice SRI per shipment against
SRI's individual POs. SRI agrees to pay said SST invoices according to the
stated payment terms. SST's current payment terms are: net 35 days post USA
arrival. SST will not charge sales or use taxes on SST invoices since it is
understood that SRI is acting as a wholesale purchaser and will include
these products in contract sales, resell these products or retail these
products to third parties.


<PAGE>



page 2 SRI/SST 10 Year Agreement

         10. Future Relationships: The parties intend to jointly develop a
primate quarantine facility in the form of a joint venture which will import,
quarantine, hold and sell primates to third parties. It is believed that if
and when this joint venture occurs, that this agreement will be modified or
terminated based upon the parties new relationship and agreements.

         IN WITNESS WHEREOF the undersigned have executed this Agreement


Scientific Resources International, Limited (SRI)


By: /s/ Robert K. Pickup                Title: Managing Director, Partner
   -------------------------------
   Print name: Robert K. Pickup

Dated: Feb 3             , 1997
      ----------------------------


Scientific Resources International, Limited (SRI)


By: /s/ Lawrence C.K. Wong              Title: Director Chinese Affairs, Partner
   -------------------------------
   Print name: L.C.K. Wong

Dated: Feb 4             , 1997
      ----------------------------


Shared Sci-Tech, Limited (SST)


By: /s/ Guogiang Li                     Title: General Manager
   -------------------------------
   Print name: Guogiang Li

Dated: Feb 8,       , 1997
      ----------------------------



By: /s/ D. Kornbrust                    Title: Vice President
   -------------------------------
   Print name: D. Kornbrush

Dated: 3-17-97      , 19
      ----------------------------



EXHIBIT 12.1

Charles River Laboratories Inc.
Computation of Ratio of Earnings to Fixed Charges
(In millions, except ratio data)

<TABLE>


                                                                                                                Pro Forma
                                                                                                      -----------------------------
                                                                                       Nine     Nine   Fiscal      Nine    Twelve
                                                                                      Months   Months   Year      Months    Months
                                                                                       Ended    Ended   Ended      Ended     Ended
                                      12/31/94  12/30/95 12/28/96 12/27/97  12/26/98  9/26/98  9/25/99 12/26/98   9/25/99   9/25/99
                                      --------  -------- -------- --------  -------- -------- -------- --------  --------  --------
<S>                                   <C>       <C>      <C>      <C>       <C>      <C>      <C>      <C>       <C>       <C>

Income before taxes(*)................$ 20,822   27,773   26,134   23,839    37,501   29,739   36,855    1,831     7,193     5,770
Fixed charges:
   Interest expense...................     464      768      491      501       421      311      207   35,013    28,330    37,083
   Amortization of deferred
      financing costs.................       -        -        -        -         -        -        -    1,523     1,142     1,523
   1/3 rent from operating leases.....     531      781      981    1,037     1,091      876      921    1,091       921     1,136
                                      --------   ------   ------   ------    ------   ------   ------   ------    ------    ------
   Total fixed charges................$    995    1,549    1,472    1,538     1,512    1,187    1,128   37,627    30,393    39,742
                                      --------   ------   ------   ------    ------   ------   ------   ------    ------    ------
Earnings + fixed charges..............$ 21,817   29,322   27,606   25,377    39,013   30,926   37,983   39,458    37,586    45,512
                                      --------   ------   ------   ------    ------   ------   ------   ------    ------    ------
Ratio of earnings to fixed charges....    21.9     18.9     18.8     16.5      25.8     26.1     33.7      1.0       1.2       1.1
                                      ========   ======   ======   ======    ======   ======   ======   ======    ======    ======
</TABLE>
- -------------------
(*)  Includes earnings from equity investments less minority interests.


EXHIBIT 12.2

Charles River Laboratories, Inc.
Computation of Ratio of Total Pro Forma Debt to Adjusted EBITDA
(In millions, except ratio data)



                                                                 Pro Forma
                                                            Twelve Months Ended
                                                             September 25, 1999
                                                            -------------------
Total Debt..................................................     $  311,128
Adjusted EBITDA.............................................         57,031
                                                                 ----------
Total Pro Forma Debt to Adjusted EBITDA.....................            5.5x


EXHIBIT 12.3

Charles River Laboratories, Inc.
Computation of Ratio of Adjusted EBITDA to Cash Interest Expense
(In millions, except ratio data)


                          Pro Forma         Pro Forma             Pro Forma
                         Fiscal Year    Nine Months Ended    Twelve Months Ended
                          Ended 1998    September 25, 1999    September 25, 1999
                         -----------    ------------------   -------------------
Adjusted EBITDA..........  $ 51,453          $ 45,468             $  57,031
Cash Interest Expense....    35,013            28,330                37,134
                           --------          --------             ---------
Adjusted EBITDA to Cash
  Interest Expense.......       1.5x              1.6x                 1.5x


                                      NONE

                       CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the use of this Registration Statement on Form S-1 of our
report dated June 30, 1999, except as to Note 2, which is as of September 29,
1999 relating to the financial statements and financial statement schedule of
Charles River Laboratories, Inc., which appear in such Registration Statement.
We also consent to the reference to us under the heading "Independent
Accountants" in such Registration Statement.

/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
November 30, 1999


                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549


                                   FORM T-1
                                   ---------

                      STATEMENT OF ELIGIBILITY UNDER THE
                       TRUST INDENTURE ACT OF 1939 OF A
                   CORPORATION DESIGNATED TO ACT AS TRUSTEE

               Check if an Application to Determine Eligibility
                  of a Trustee Pursuant to Section 305(b)(2)


                      STATE STREET BANK AND TRUST COMPANY
              (Exact name of trustee as specified in its charter)

                    Massachusetts                           04-1867445
          (Jurisdiction of incorporation or              (I.R.S. Employer
      organization if not a U.S. national bank)        Identification No.)

               225 Franklin Street, Boston, Massachusetts 02110
              (Address of principal executive offices) (Zip Code)

  Maureen Scannell Bateman, Esq. Executive Vice President and General Counsel
               225 Franklin Street, Boston, Massachusetts 02110
                                (617) 654-3253
           (Name, address and telephone number of agent for service)

                       CHARLES RIVER LABORATORIES, INC.
              (Exact name of obligor as specified in its charter)

                       DELAWARE                       76-0509980
           (State or other jurisdiction of         (I.R.S. Employer
            incorporation or organization)       Identification No.)

                            251 Ballardvale Street
                             Wilmington, MA 01887
              (Address of principal executive offices) (Zip Code)

              13 1/2% Series B Senior Subordinated Notes due 2009

                        (Title of indenture securities)

<PAGE>




                                    GENERAL

Item 1.  General Information.

         Furnish the following information as to the trustee:

         (a) Name and address of each examining or supervisory authority to
which it is subject.

               Department of Banking and Insurance of The Commonwealth of
               Massachusetts, 100 Cambridge Street, Boston, Massachusetts.

               Board of Governors of the Federal Reserve System,
               Washington, D.C., Federal Deposit Insurance Corporation,
               Washington, D.C.

         (b) Whether it is authorized to exercise corporate trust powers.
Trustee is authorized to exercise corporate trust powers.

Item 2.  Affiliations with Obligor.

         If the Obligor is an affiliate of the trustee, describe each such
affiliation.

               The obligor is not an affiliate of the trustee or of its
               parent, State Street Corporation.

                    (See note on page 2.)

Item 3. through Item 15.   Not applicable.

Item 16. List of Exhibits.

         List below all exhibits filed as part of this statement of
eligibility.

         1. A copy of the articles of association of the trustee as now in
effect.

               A copy of the Articles of Association of the trustee, as now
               in effect, is on file with the Securities and Exchange
               Commission as Exhibit 1 to Amendment No. 1 to the Statement of
               Eligibility and Qualification of Trustee (Form T-1) filed with
               the Registration Statement of Morse Shoe, Inc. (File No.
               22-17940) and is incorporated herein by reference thereto.

         2. A copy of the certificate of authority of the trustee to commence
business, if not contained in the articles of association.

                A copy of a Statement from the Commissioner of Banks of
               Massachusetts that no certificate of authority for the trustee
               to commence business was necessary or issued is on file with
               the Securities and Exchange Commission as Exhibit 2 to
               Amendment No. 1 to the Statement of Eligibility and
               Qualification of Trustee (Form T-1) filed with the Registration
               Statement of Morse Shoe, Inc. (File No. 22-17940) and is
               incorporated herein by reference thereto.

         3. A copy of the authorization of the trustee to exercise corporate
         trust powers, if such authorization is not contained in the documents
         specified in paragraph (1) or (2), above.

               A copy of the authorization of the trustee to exercise corporate
               trust powers is on file with the Securities and Exchange
               Commission as Exhibit 3 to Amendment No. 1 to the Statement of
               Eligibility and Qualification of Trustee (Form T-1) filed with
               the Registration Statement of Morse Shoe, Inc. (File No.
               22-17940) and is incorporated herein by reference thereto.

         4. A copy of the existing by-laws of the trustee, or instruments
corresponding thereto.

               A copy of the by-laws of the trustee, as now in effect, is on
               file with the Securities and Exchange Commission as Exhibit 4
               to the Statement of Eligibility and Qualification of Trustee
               (Form T-1) filed with the Registration Statement of Eastern
               Edison Company (File No. 33-37823) and is incorporated herein
               by reference thereto.


                                       2


<PAGE>




         5. A copy of each indenture referred to in Item 4. if the obligor is
in default.

               Not applicable.

         6. The consents of United States institutional trustees required by
Section 321(b) of the Act.

               The consent of the trustee required by Section 321(b) of the Act
               is annexed hereto as Exhibit 6 and made a part hereof.

         7. A copy of the latest report of condition of the trustee published
pursuant to law or the requirements of its supervising or examining authority.

               A copy of the latest report of condition of the trustee
               published pursuant to law or the requirements of its
               supervising or examining authority is annexed hereto as Exhibit
               7 and made a part hereof.


                                     NOTES

         In answering any item of this Statement of Eligibility which relates
to matters peculiarly within the knowledge of the obligor or any underwriter
for the obligor, the trustee has relied upon information furnished to it by
the obligor and the underwriters, and the trustee disclaims responsibility for
the accuracy or completeness of such information.

         The answer furnished to Item 2. of this statement will be amended, if
necessary, to reflect any facts which differ from those stated and which would
have been required to be stated if known at the date hereof.


                                   SIGNATURE

         Pursuant to the requirements of the Trust Indenture Act of 1939, as
amended, the trustee, State Street Bank and Trust Company, a corporation
organized and existing under the laws of The Commonwealth of Massachusetts,
has duly caused this statement of eligibility to be signed on its behalf by
the undersigned, thereunto duly authorized, all in the City of Hartford and
the State of Connecticut, on the 4th day of November, 1999.


                                             STATE STREET BANK AND TRUST COMPANY


                                             By:________________________________
                                                Elizabeth C. Hammer
                                                Vice President


                                      3


<PAGE>


                                   EXHIBIT 6

                            CONSENT OF THE TRUSTEE

         Pursuant to the requirements of Section 321(b) of the Trust Indenture
Act of 1939, as amended, in connection with the proposed issuance by Charles
River Laboratories, Inc.. of its 13 1/2% Series B Senior Subordinated Notes
due 2009, we hereby consent that reports of examination by Federal, State,
Territorial or District authorities may be furnished by such authorities to
the Securities and Exchange Commission upon request therefor.

                                             STATE STREET BANK AND TRUST COMPANY


                                             By:________________________________
                                                Elizabeth C. Hammer
                                                Vice President


Dated: November 4, 1999



                                       4


<PAGE>


                                   EXHIBIT 7

Consolidated Report of Condition of State Street Bank and Trust Company,
Massachusetts and foreign and domestic subsidiaries, a state banking
institution organized and operating under the banking laws of this
commonwealth and a member of the Federal Reserve System, at the close of
business June 30, 1999, published in accordance with a call made by the
Federal Reserve Bank of this District pursuant to the provisions of the
Federal Reserve Act and in accordance with a call made by the Commissioner of
Banks under General Laws, Chapter 172, Section 22(a).

                                                                    Thousands of
ASSETS                                                                 Dollars

Cash and balances due from depository institutions:
  Noninterest-bearing balances and currency and coin ................  1,755,237
  Interest-bearing balances ......................................... 14,209,161
Securities .......................................................... 13,027,148
Federal funds sold and securities purchased
  under agreements to resell in domestic offices
  of the bank and its Edge subsidiary ................................ 7,840,413
Loans and lease financing receivables:
  Loans and leases, net of unearned income ........... 8,134,756
  Allowance for loan and lease losses ................    88,351
  Allocated transfer risk reserve.....................         0
  Loans and leases, net of unearned income and allowances ...........  8,046,405
Assets held in trading accounts .....................................  1,753,511
Premises and fixed assets ...........................................    529,247
Other real estate owned .............................................          0
Investments in unconsolidated subsidiaries ..........................        603
Customers' liability to this bank on acceptances outstanding ........     76,078
Intangible assets ...................................................    223,035
Other assets.........................................................  1,481,250
                                                                     -----------
Total assets ........................................................ 48,942,088
                                                                     ===========
LIABILITIES

Deposits:
         In domestic offices ........................................ 13,006,374
                  Noninterest-bearing ................ 9,462,505
                  Interest-bearing ................... 3,543,869
         In foreign offices and Edge subsidiary ..................... 19,913,151
                  Noninterest-bearing ................   444,189
                  Interest-bearing ...................19,468,962
Federal funds purchased and securities sold under
         agreements to repurchase in domestic offices of
         the bank and of its Edge subsidiary ........................ 10,510,055
Demand notes issued to the U.S. Treasury.............................      0
                 Trading liabilities.................................  1,151,604
Other borrowed money ................................................    198,253
Subordinated notes and debentures ...................................      0
Bank's liability on acceptances executed and outstanding ............     76,078
Other liabilities ...................................................  1,291,791

Total liabilities ................................................... 46,147,306
                                                                     -----------
EQUITY CAPITAL
Perpetual preferred stock and related surplus........................       0
Common stock.........................................................     29,931
Surplus..............................................................    489,739
Undivided profits and capital reserves/Net unrealized holding gains
  (losses)...........................................................  2,313,006
         Net unrealized holding gains (losses) on available-for-sale
           securities................................................   (25,610)
Cumulative foreign currency translation adjustments  ................   (12,284)
Total equity capital ................................................  2,794,782
                                                                     -----------
Total liabilities and equity capital ................................ 48,942,088
                                                                     -----------


                                       5


<PAGE>


I, Rex S. Schuette, Senior Vice President and Comptroller of the above named
bank do hereby declare that this Report of Condition has been prepared in
conformance with the instructions issued by the Board of Governors of the
Federal Reserve System and is true to the best of my knowledge and belief.


                                Rex S. Schuette

We, the undersigned directors, attest to the correctness of this Report of
Condition and declare that it has been examined by us and to the best of our
knowledge and belief has been prepared in conformance with the instructions
issued by the Board of Governors of the Federal Reserve System and is true and
correct.

                                                      David A. Spina
                                                      Marshall N. Carter
                                                      Truman S. Casner



                                       6



                                                                    Exhibit 99.1

                             LETTER OF TRANSMITTAL

                       CHARLES RIVER LABORATORIES, INC.


                             Offer to Exchange Its
              13 1/2% Series B Senior Subordinated Notes due 2009
                 (Registered Under The Securities Act of 1933)
                      For Any and All of Its Outstanding
              13 1/2% Series A Senior Subordinated Notes due 2009


                          Pursuant to the Prospectus
                             Dated ______ __, 1999


- --------------------------------------------------------------------------------
     THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW
     YORK CITY TIME, ON                , 1999, UNLESS THE OFFER IS EXTENDED.
- --------------------------------------------------------------------------------

                 THE EXCHANGE AGENT FOR THE EXCHANGE OFFER IS:
                      STATE STREET BANK AND TRUST COMPANY


By Registered or Certified Mail:        By Overnight Delivery or Hand:
State Street Bank and Trust Company.    State Street Bank and Trust Company.
       Corporate Trust Department           Corporate Trust Department
         Two Avenue de Lafayette              Two Avenue de Lafayette
               Fifth Floor                          Fifth Floor
          Boston, MA 02111-1724                Boston, MA 02111-1724
         Contact: Kellie Mullen               Contact: Kellie Mullen

                                        Facsimile Transmissions:
       To Confirm by Telephone             (617-662-1450)
       or for Information:
       (617-662-1525)


     DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET
FORTH ABOVE OR TRANSMISSION OF THIS LETTER OF TRANSMITTAL VIA FACSIMILE TO A
NUMBER OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A VALID DELIVERY.

     THE INSTRUCTIONS CONTAINED HEREIN SHOULD BE READ CAREFULLY BEFORE THIS
LETTER OF TRANSMITTAL IS COMPLETED.

     Capitalized terms used but not defined herein shall have the same meaning
given them in the Prospectus (as defined below).

     This Letter of Transmittal is to be completed by holders of Old Notes (as
defined below) if Old Notes are to be forwarded herewith. If tenders of Old
Notes are to be made by book-entry transfer to an account maintained by State
Street Bank and Trust Company (the "Exchange Agent") at The Depository Trust
Company ("DTC") pursuant to the




<PAGE>



procedures set forth in "The Exchange Offer--Book-Entry Transfer" in the
Prospectus and in accordance with the Automated Tender Offer Program ("ATOP")
established by DTC, a tendering holder will become bound by the terms and
conditions hereof in accordance with the procedures established under ATOP.

     Holders of Old Notes whose certificates (the "certificates") for such Old
Notes are not immediately available or who cannot deliver their certificates
and all other required documents to the Exchange Agent on or prior to the
expiration date (as defined in the Prospectus) or who cannot complete the
procedures for book-entry transfer on a timely basis, must tender their Old
Notes according to the guaranteed delivery procedures set forth in "The
Exchange Offer--Guaranteed Delivery Procedures" in the Prospectus. SEE
INSTRUCTION 1. DELIVERY OF DOCUMENTS TO DTC IN ACCORDANCE WITH ITS PROCEDURES
DOES NOT CONSTITUTE DELIVERY TO THE EXCHANGE AGENT.


                                       2

<PAGE>


<TABLE>

                                        NOTE: SIGNATURES MUST BE PROVIDED BELOW
                                  PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY

                                       ALL TENDERING HOLDERS COMPLETE THIS BOX:
- ---------------------------------------------------------------------------------------------------------------
                                           DESCRIPTION OF OLD NOTES TENDERED
- ---------------------------------------------------------------------------------------------------------------
<S>                                                <C>                <C>                  <C>
  Name(s) and address(es) of Registered Holder(s)                     Old Notes Tendered
            (Please fill in, if blank)                       (attach additional list if necessary)
- ---------------------------------------------------------------------------------------------------------------
                                                                                           Principal Amount of
                                                    Certificate        Principal Amount     Old Notes Tendered
                                                     Number(s)*         of Old Notes*      (if less than all)**
                                                  -------------------------------------------------------------
                                                  -------------------------------------------------------------
                                                  -------------------------------------------------------------
                                                  -------------------------------------------------------------
                                                  -------------------------------------------------------------
                                                    Total Amount
                                                      Tendered
- ---------------------------------------------------------------------------------------------------------------
</TABLE>

  *  Need not be completed by book-entry holders.
**   Old Notes may be tendered in whole or in part in denominations of $1,000
     and integral multiples thereof. All Old Notes held shall be deemed
     tendered unless a lesser number is specified in this column.

           (BOXES BELOW TO BE CHECKED BY ELIGIBLE INSTITUTIONS ONLY)


[ ]   CHECK HERE IF TENDERED OLD NOTES ARE BEING DELIVERED BY BOOK-ENTRY
      TRANSFER MADE TO THE ACCOUNT MAINTAINED BY THE EXCHANGE AGENT WITH DTC AND
      COMPLETE THE FOLLOWING:

      Name of Tendering Institution_____________________________________________

      DTC Account Number________________________________________________________

      Transaction Code Number___________________________________________________

o     CHECK HERE AND ENCLOSE A PHOTOCOPY OF THE NOTICE OF GUARANTEED DELIVERY
      IF TENDERED OLD NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
      GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE
      THE FOLLOWING:

      Name of Registered Holder(s)______________________________________________

      Window Ticket Number (if any)_____________________________________________

      Date of Execution of Notice of Guaranteed Delivery________________________

      Name of Institution which Guaranteed______________________________________


      If Guaranteed Delivery is to be made By Book-Entry Transfer:

      Name of Tendering Institution_____________________________________________

      DTC Account Number________________________________________________________

      Transaction Code Number___________________________________________________

o     CHECK HERE IF TENDERED BY BOOK-ENTRY TRANSFER AND NON-EXCHANGED OLD
      NOTES ARE TO BE RETURNED BY CREDITING THE DTC ACCOUNT NUMBER SET FORTH
      ABOVE.
o     CHECK HERE IF YOU ARE A BROKER-DEALER WHO ACQUIRED THE OLD NOTES FOR ITS
      OWN ACCOUNT AS A RESULT OF MARKET MAKING OR OTHER TRADING ACTIVITIES (A
      "PARTICIPATING BROKER-DEALER") AND WISH TO RECEIVE 10 ADDITIONAL COPIES
      OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
      THERETO.

      Name______________________________________________________________________

      Address:__________________________________________________________________

              __________________________________________________________________


                                       3

<PAGE>



Ladies and Gentlemen:

     The undersigned hereby tenders to Charles River Laboratories, Inc., a
Delaware corporation (the "Company"), the principal amount of the Company's 13
1/2% Series A Senior Subordinated Notes due 2009 (the "Old Notes") specified
above in exchange for a like aggregate principal amount of the Company's 13
1/2% Series B Senior Subordinated Notes due 2009 (the "New Notes"), upon the
terms and subject to the conditions set forth in the Prospectus dated _____ _,
1999 (as the same may be amended or supplemented from time to time, the
"Prospectus"), receipt of which is acknowledged, and in this Letter of
Transmittal (which, together with the Prospectus, constitute the "Exchange
Offer"). The Exchange Offer has been registered under the Securities Act of
1933, as amended (the "Securities Act").

     Subject to and effective upon the acceptance for exchange of all or any
portion of the Old Notes tendered herewith in accordance with the terms and
conditions of the Exchange Offer (including, if the Exchange Offer is extended
or amended, the terms and conditions of any such extension or amendment), the
undersigned hereby sells, assigns and transfers to or upon the order of the
Company all right, title and interest in and to such Old Notes as are being
tendered herewith. The undersigned hereby irrevocably constitutes and appoints
the Exchange Agent as its agent and attorney-in-fact (with full knowledge that
the Exchange Agent is also acting as agent of the Company in connection with
the Exchange Offer) with respect to the tendered Old Notes, with full power of
substitution (such power of attorney being deemed to be an irrevocable power
coupled with an interest), subject only to the right of withdrawal described
in the Prospectus, to (i) deliver certificates for Old Notes to the Company
together with all accompanying evidences of transfer and authenticity to, or
upon the order of, the Company, upon receipt by the Exchange Agent, as the
undersigned's agent, of the New Notes to be issued in exchange for such Old
Notes, (ii) present certificates for such Old Notes for transfer, and to
transfer the Old Notes on the books of the Company, and (iii) receive for the
account of the Company all benefits and otherwise exercise all rights of
beneficial ownership of such Old Notes, all in accordance with the terms and
conditions of the Exchange Offer.

     THE UNDERSIGNED HEREBY REPRESENTS AND WARRANTS THAT THE UNDERSIGNED HAS
FULL POWER AND AUTHORITY TO TENDER, EXCHANGE, SELL, ASSIGN AND TRANSFER THE
OLD NOTES TENDERED HEREBY AND THAT, WHEN THE SAME ARE ACCEPTED FOR EXCHANGE,
THE COMPANY WILL ACQUIRE GOOD, MARKETABLE AND UNENCUMBERED TITLE THERETO, FREE
AND CLEAR OF ALL LIENS, RESTRICTIONS, CHARGES AND ENCUMBRANCES, AND THAT THE
OLD NOTES TENDERED HEREBY ARE NOT SUBJECT TO ANY ADVERSE CLAIMS OR PROXIES.
THE UNDERSIGNED WILL, UPON REQUEST, EXECUTE AND DELIVER ANY ADDITIONAL
DOCUMENTS DEEMED BY THE COMPANY OR THE EXCHANGE AGENT TO BE NECESSARY OR
DESIRABLE TO COMPLETE THE EXCHANGE, ASSIGNMENT AND TRANSFER OF THE OLD NOTES
TENDERED HEREBY, AND THE UNDERSIGNED WILL COMPLY WITH ITS OBLIGATIONS UNDER
THE REGISTRATION RIGHTS AGREEMENT. THE UNDERSIGNED HAS READ AND AGREES TO ALL
OF THE TERMS OF THE EXCHANGE OFFER.

     The name(s) and address(es) of the registered holder(s) of the Old Notes
tendered hereby should be printed above, if they are not already set forth
above, as they appear on the certificates representing such Old Notes. The
certificate number(s) and the Old Notes that the undersigned wishes to tender
should be indicated in the appropriate boxes above.

     If any tendered Old Notes are not exchanged pursuant to the Exchange
Offer for any reason, or if certificates are submitted for more Old Notes than
are tendered or accepted for exchange, certificates for such unaccepted or
nonexchanged Old Notes will be returned (or, in the case of Old Notes tendered
by book-entry transfer, such Old Notes will be credited to an account
maintained at DTC), without expense to the tendering holder, promptly
following the expiration or termination of the Exchange Offer.

     The undersigned understands that tenders of Old Notes pursuant to any one
of the procedures described in "The Exchange Offer--Procedures for Tendering
Old Notes" in the Prospectus and in the instructions hereto will, upon the
Company's acceptance for exchange of such tendered Old Notes, constitute a
binding agreement between the undersigned and the Company upon the terms and
subject to the conditions of the Exchange Offer. In all cases in which a
Participant elects to accept the Exchange Offer by transmitting an express
acknowledgment in accordance with the established ATOP procedures, such
Participant shall be bound by all of the terms and conditions of this Letter
of Transmittal. The undersigned recognizes that, under certain circumstances
set forth in the Prospectus, the Company may not be required to accept for
exchange any of the Old Notes tendered hereby.

     Unless otherwise indicated herein in the box entitled "Special Issuance
Instructions" below, the undersigned hereby directs that the New Notes be
issued in the name(s) of the undersigned or, in the case of a book-entry
transfer of Old Notes, that such New Notes be credited to the account
indicated above maintained at DTC. If applicable, substitute certificates
representing Old Notes not exchanged or not accepted for exchange will be
issued to the undersigned or, in the case of a book-entry transfer of Old
Notes, will be credited to the account indicated above maintained at DTC.
Similarly, unless otherwise indicated under "Special Delivery Instructions,"
please deliver New Notes to the undersigned at the address shown below the
undersigned's signature.


                                       4

<PAGE>



     By tendering Old Notes and executing, or otherwise becoming bound by,
this letter of transmittal, the undersigned hereby represents and agrees that

     (i) the undersigned is not an "affiliate" of the Company,

    (ii) any New Notes to be received by the undersigned are being acquired
in the ordinary course of its business, and

   (iii) the undersigned has no arrangement or understanding with any person
to participate in a distribution (within the meaning of the securities act) of
such New Notes.

     By tendering Old Notes pursuant to the exchange offer and executing, or
otherwise becoming bound by, this letter of transmittal, a holder of Old Notes
which is a broker-dealer represents and agrees, consistent with certain
interpretive letters issued by the staff of the Division of Corporation
Finance of the Securities and Exchange Commission to third parties, that (a)
such Old Notes held by the broker-dealer are held only as a nominee, or (b)
such Old Notes were acquired by such broker-dealer for its own account as a
result of market-making activities or other trading activities and it will
deliver the prospectus (as amended or supplemented from time to time) meeting
the requirements of the securities act in connection with any resale of such
New Notes (provided that, by so acknowledging and by delivering a prospectus,
such broker-dealer will not be deemed to admit that it is an "underwriter"
within the meaning of the securities act).

     The Company has agreed that, subject to the provisions of the
Registration Rights Agreement, the prospectus, as it may be amended or
supplemented from time to time, may be used by a participating broker-dealer
(as defined below) in connection with resales of New Notes received in
exchange for Old Notes, where such Old Notes were acquired by such
participating broker-dealer for its own account as a result of market-making
activities or other trading activities, for a period ending 90 days after the
expiration date (subject to extension under certain limited circumstances) or,
if earlier, when all such New Notes have been disposed of by such
participating broker-dealer. In that regard, each broker dealer who acquired
Old Notes for its own account as a result of market-making or other trading
activities (a "participating broker-dealer"), by tendering such Old Notes and
executing, or otherwise becoming bound by, this letter of transmittal, agrees
that, upon receipt of notice from the Company of the occurrence of any event
or the discovery of any fact which makes any statement contained in the
prospectus untrue in any material respect or which causes the prospectus to
omit to state a material fact necessary in order to make the statements
contained therein, in light of the circumstances under which they were made,
not misleading or of the occurrence of certain other events specified in the
Registration Rights Agreement, such participating broker-dealer will suspend
the sale of New Notes pursuant to the prospectus until the Company has amended
or supplemented the prospectus to correct such misstatement or omission and
has furnished copies of the amended or supplemented prospectus to the
participating broker-dealer or the Company has given notice that the sale of
the New Notes may be resumed, as the case may be. If the Company gives such
notice to suspend the sale of the New Notes, it shall extend the 90-day period
referred to above during which participating broker-dealers are entitled to
use the prospectus in connection with the resale of New Notes by the number of
days during the period from and including the date of the giving of such
notice to and including the date when participating broker-dealers shall have
received copies of the supplemented or amended prospectus necessary to permit
resales of the New Notes or to and including the date on which the Company has
given notice that the sale of New Notes may be resumed, as the case may be.

     All authority herein conferred or agreed to be conferred in this Letter
of Transmittal shall survive the death or incapacity of the undersigned and
any obligation of the undersigned hereunder shall be binding upon the heirs,
executors, administrators, personal representatives, trustees in bankruptcy,
legal representatives successors and assigns of the undersigned. Except as
stated in the Prospectus, this tender is irrevocable.


                                       5

<PAGE>




                              HOLDER(S) SIGN HERE
                         (See Instructions 2, 5 and 6)
     (Note: Signature(s) Must be Guaranteed if Required by Instruction 2)

     Must be signed by registered holder(s) exactly as name(s) appear(s) on
certificate(s) for the Old Notes hereby tendered or on a security position
listing, or by any person(s) authorized to become the registered holder(s) by
endorsements and documents transmitted herewith. If signature is by an
attorney-in-fact, executor, administrator, trustee, guardian, officer of a
corporation or another acting in a fiduciary or representative capacity,
please set forth the signer's full title. See Instruction 5.


- --------------------------------------------------------------------------------
                          (Signature(s) of Holder(s))

Date
    ----------------------------------------------------------------------, 1998


Name(s)
       -------------------------------------------------------------------------


- --------------------------------------------------------------------------------
                                (Please Print)

Capacity:
         -----------------------------------------------------------------------
                             (Include Full Title)

Address
       -------------------------------------------------------------------------


- --------------------------------------------------------------------------------
                              (Include Zip Code)


Area Code and Telephone Number
                               -------------------------------------------------


- --------------------------------------------------------------------------------
               (Tax Identification or Social Security Number(s))


                           GUARANTEE OF SIGNATURE(S)
                          (See Instructions 2 and 5)

Authorized Signature
                    ------------------------------------------------------------


Name
    ----------------------------------------------------------------------------



- --------------------------------------------------------------------------------
                                (Please Print)

Date
    ----------------------------------------------------------------------, 1998

Capacity or Title
                 ---------------------------------------------------------------


Name of Firm
            --------------------------------------------------------------------


Address
       -------------------------------------------------------------------------
                              (Include Zip Code)

Area Code and Telephone Number
                             ---------------------------------------------------


                                       6
<PAGE>



   SPECIAL ISSUANCE INSTRUCTIONS               SPECIAL DELIVERY INSTRUCTIONS
   (See Instructions 1, 5 and 6)               (See Instructions 1, 5 and 6)

  To be completed ONLY if the New Notes       To be completed ONLY if New Notes
are to be issued in the name of someone    are to be sent to someone other than
other than the registered holder of the    the registered holder of the Old
Old Notes whose name(s) appear(s) above.   Notes whose name(s) appear(s) above,
                                           or to such registered holder(s) at an
                                           address other than that shown above.

    Issue New Notes to:                      Mail New Notes To:

Name___________________________________    Name_________________________________
               (Please Print)                            (Please Print)

_______________________________________    _____________________________________

Address________________________________    _____________________________________

_______________________________________    _____________________________________

_______________________________________    _____________________________________
            (Include Zip Code)                          (Include Zip Code)

_______________________________________    _____________________________________
      (Taxpayer Identification or               (Taxpayer Identification or
        Social Security Number)                   Social Security Number)


                                       6

<PAGE>


                                 INSTRUCTIONS
        Forming Part of the Terms and Conditions of the Exchange Offer

     1. DELIVERY OF LETTER OF TRANSMITTAL AND CERTIFICATES; GUARANTEED DELIVERY
PROCEDURES. This Letter of Transmittal is to be completed if certificates are
to be forwarded herewith. If tenders are to be made pursuant to the procedures
for tender by book-entry transfer set forth in "The Exchange Offer--Book-
Entry Transfer" in the Prospectus and in accordance with ATOP established by
DTC, a tendering holder will become bound by the terms and conditions hereof
in accordance with the procedures established under ATOP. Certificates, or
timely confirmation of a book-entry transfer of such Old Notes into the
Exchange Agent's account at DTC, as well as this Letter of Transmittal (or
facsimile thereof), if required, properly completed and duly executed, with
any required signature guarantees, and any other documents required by this
Letter of Transmittal, must be received by the Exchange Agent at one of its
addresses set forth herein on or prior to the expiration date. Old Notes may
be tendered in whole or in part in the principal amount of $1,000 and integral
multiples of $1,000.

     Holders who wish to tender their Old Notes and (i) whose Old Notes are
not immediately available or (ii) who cannot deliver their Old Notes, this
Letter of Transmittal and all other required documents to the Exchange Agent
on or prior to the expiration date or (iii) who cannot complete the procedures
for delivery by book-entry transfer on a timely basis, may tender their Old
Notes by properly completing and duly executing a Notice of Guaranteed
Delivery pursuant to the guaranteed delivery procedures set forth in "The
Exchange Offer--Guaranteed Delivery Procedures" in the Prospectus. Pursuant to
such procedures: (i) such tender must be made by or through an Eligible
Institution (as defined below); (ii) a properly completed and duly executed
Letter of Transmittal (or facsimile) thereof and Notice of Guaranteed
Delivery, substantially in the form made available by the Company, must be
received by the Exchange Agent on or prior to the expiration date; and (iii)
the certificates (or a book-entry confirmation (as defined in the Prospectus))
representing all tendered Old Notes, in proper form for transfer, together
with any other documents required by this Letter of Transmittal, must be
received by the Exchange Agent within five New York Stock Exchange trading
days after the date of execution of such Notice of Guaranteed Delivery, all as
provided in "The Exchange Offer--Guaranteed Delivery Procedures" in the
Prospectus.

     The Notice of Guaranteed Delivery may be delivered by hand or transmitted
by telegram, telex, facsimile or mail to the Exchange Agent, and must include
a guarantee by an Eligible Institution in the form set forth in such Notice.
For Old Notes to be properly tendered pursuant to the guaranteed delivery
procedure, the Exchange Agent must receive a Notice of Guaranteed Delivery on
or prior to the expiration date. As used herein and in the Prospectus,
"Eligible Institution" means a firm which is a member of a registered national
securities exchange or a member of the National Association of Securities
Dealers, Inc. or a commercial bank or trust company having an office or
correspondent in the United States.

     THE METHOD OF DELIVERY OF OLD NOTES, THIS LETTER OF TRANSMITTAL AND ALL
OTHER REQUIRED DOCUMENTS IS AT THE ELECTION AND RISK OF THE TENDERING HOLDER.
IF SUCH DELIVERY IS BY MAIL, IT IS RECOMMENDED THAT REGISTERED MAIL WITH
RETURN RECEIPT REQUESTED, PROPERLY INSURED, BE USED. IN ALL CASES, SUFFICIENT
TIME SHOULD BE ALLOWED TO ASSURE TIMELY DELIVERY. NO LETTERS OF TRANSMITTAL OR
OLD NOTES SHOULD BE SENT TO THE COMPANY.

     The Company will not accept any alternative, conditional or contingent
tenders. Each tendering holder, by execution of a Letter of Transmittal (or
facsimile thereof), or any Agent's Message in lieu thereof, waives any right
to receive any notice of the acceptance of such tender.

      2. GUARANTEE OF SIGNATURES. No signature guarantee on this Letter of
Transmittal is required if:

        (i) this Letter of Transmittal is signed by the registered holder (which
     term, for purposes of this document, shall include any participant in DTC
     whose name appears on a security position listing as the owner of the Old
     Notes) of Old Notes tendered herewith, unless such holder(s) has
     completed either the box entitled "Special Issuance Instructions" or the
     box entitled "Special Delivery Instructions" above, or

       (ii) such Old Notes are tendered for the account of a firm that is an
Eligible Institution.


                                       7

<PAGE>




     In all other cases, an Eligible Institution must guarantee the signature(s)
on this Letter of Transmittal. See Instruction 5.

      3. INADEQUATE SPACE. If the space provided in the box captioned
"Description of Old Notes" is inadequate, the certificate number(s) and/or the
principal amount of Old Notes and any other required information should be
listed on a separate signed schedule which is attached to this Letter of
Transmittal.

      4. PARTIAL TENDERS AND WITHDRAWAL RIGHTS. Tenders of Old Notes will be
accepted only in the principal amount of $1,000 and integral multiples
thereof. If less than all the Old Notes evidenced by any certificate submitted
are to be tendered, fill in the principal amount of Old Notes which are to be
tendered in the box entitled "Principal Amount of Old Notes Tendered (if less
than all)." In such case, new certificate(s) for the remainder of the Old
Notes that were evidenced by your old certificate(s) will only be sent to the
holder of the Old Note, promptly after the expiration date. All Old Notes
represented by certificates delivered to the Exchange Agent will be deemed to
have been tendered unless otherwise indicated.

     Except as otherwise provided herein, tenders of Old Notes may be
withdrawn at any time on or prior to the expiration date. In order for a
withdrawal to be effective on or prior to that time, a written notice of
withdrawal must be timely received by the Exchange Agent at one of its
addresses set forth above or in the Prospectus on or prior to the expiration
date. Any such notice of withdrawal must specify the name of the person who
tendered the Old Notes to be withdrawn, identify the Old Notes to be withdrawn
(including the principal amount of such Old Notes) and (where certificates for
Old Notes have been transmitted) specify the name in which such Old Notes are
registered, if different from that of the withdrawing holder. If certificates
for the Old Notes have been delivered or otherwise identified to the Exchange
Agent, then prior to the release of such certificates, the withdrawing holder
must submit the serial numbers of the particular certificates for the Old
Notes to be withdrawn and a signed notice of withdrawal with signatures
guaranteed by an Eligible Institution, unless such holder is an Eligible
Institution. If Old Notes have been tendered pursuant to the procedures for
book-entry transfer set forth in the Prospectus under "The Exchange
Offer--Book-Entry Transfer," any notice of withdrawal must specify the name
and number of the account at DTC to be credited with the withdrawal of Old
Notes and otherwise comply with the procedures of such facility. Old Notes
properly withdrawn will not be deemed validly tendered for purposes of the
Exchange Offer, but may be retendered at any time on or prior to the
expiration date by following one of the procedures described in the Prospectus
under "The Exchange Offer--Procedures for Tendering Old Notes."

     All questions as to the validity, form and eligibility (including time of
receipt) of such withdrawal notices will be determined by the Company, whose
determination shall be final and binding on all parties. Any Old Notes which
have been tendered for exchange but which are not exchanged for any reason
will be returned to the holder thereof without cost to such holder (or, in the
case of Old Notes tendered by book-entry transfer into the Exchange Agent's
account at DTC pursuant to the book-entry procedures described in the
Prospectus under "The Exchange Offer--Book-Entry Transfer" such Old Notes will
be credited to an account maintained with DTC for the Old Notes) as soon as
practicable after withdrawal, rejection of tender or termination of the
Exchange Offer.

      5.   SIGNATURES ON LETTER OF TRANSMITTAL, ASSIGNMENTS AND ENDORSEMENTS.
If this Letter of Transmittal is signed by the registered holder(s) of the Old
Notes tendered hereby, the signature(s) must correspond exactly with the
name(s) as written on the face of the certificate(s) without alteration,
enlargement or any change whatsoever.

     If any of the Old Notes tendered hereby are owned of record by two or
more joint owners, all such owners must sign this Letter of Transmittal.

     If any tendered Old Notes are registered in different names on several
certificates, it will be necessary to complete, sign and submit as many
separate Letters of Transmittal (or facsimiles thereof) as there are different
registrations of certificates.

     If this Letter of Transmittal or any certificates or powers of attorney
are signed by trustees, executors, administrators, guardians,
attorneys-in-fact, officers of corporations or others acting in a fiduciary or
representative


                                       8

<PAGE>


capacity, such persons should so indicate when signing and, unless waived by
the Company, proper evidence satisfactory to the Company of such persons'
authority to so act must be submitted.

     When this Letter of Transmittal is signed by the registered holder(s) of
the Old Notes listed and transmitted hereby, no endorsement(s) of
certificate(s) or written instrument or instruments of transfer or exchange
are required unless New Notes are to be issued in the name of a person other
than the registered holder(s). Signature(s) on such certificate(s) or written
instrument or instruments of transfer or exchange must be guaranteed by an
Eligible Institution.

     If this Letter of Transmittal is signed by a person other than the
registered holder(s) of the Old Notes listed, the certificates must be
endorsed or accompanied by a written instrument or instruments of transfer or
exchange, in satisfactory form as determined by the Company in its sole
discretion and executed by the registered holder(s), in either case signed
exactly as the name or names of the registered holder(s) appear(s) on the
certificates. Signatures on such certificates or written instrument or
instruments of transfer or exchange must be guaranteed by an Eligible
Institution.

      6. SPECIAL ISSUANCE AND DELIVERY INSTRUCTIONS. If New Notes are to be
issued in the name of a person other than the signer of this Letter of
Transmittal, or if New Notes are to be sent to someone other than the signer
of this Letter of Transmittal or to an address other than that shown above,
the appropriate boxes on this Letter of Transmittal should be completed.
Certificates for Old Notes not exchanged will be returned by mail or, if
tendered by book-entry transfer, by crediting the account indicated above
maintained at DTC. See Instruction 4.

      7. IRREGULARITIES. The Company will determine, in its sole discretion,
all questions as to the form, validity, eligibility (including time of
receipt) and acceptance for exchange of any tender of Old Notes, which
determination shall be final and binding. The Company reserves the absolute
right to reject any and all tenders of any particular Old Notes not properly
tendered or to not accept any particular Old Notes which acceptance might, in
the judgment of the Company or its counsel, be unlawful. The Company also
reserves the absolute right, in its sole discretion, to waive any defects or
irregularities or conditions of the Exchange Offer as to any particular Old
Notes either before or after the expiration date (including the right to waive
the ineligibility of any holder who seeks to tender Old Notes in the Exchange
Offer). The interpretation of the terms and conditions of the Exchange Offer
as to any particular Old Notes either before or after the expiration date
(including the Letter of Transmittal and the instructions thereto) by the
Company shall be final and binding on all parties. Unless waived, any defects
or irregularities in connection with the tender of Old Notes for exchange must
be cured within such reasonable period of time as the Company shall determine.
Neither the Company, the Exchange Agent nor any other person shall be under
any duty to give notification of any defect or irregularity with respect to
any tender of Old Notes for exchange, nor shall any of them incur any
liability for failure to give such notification.

      8. QUESTIONS, REQUESTS FOR ASSISTANCE AND ADDITIONAL COPIES. Questions
and requests for assistance may be directed to the Exchange Agent at its
address and telephone number set forth on the front of this Letter of
Transmittal. Additional copies of the Prospectus, the Notice of Guaranteed
Delivery and the Letter of Transmittal may be obtained from the Exchange Agent
or from your broker, dealer, commercial bank, trust company or other nominee.

      9. LOST, DESTROYED OR STOLEN CERTIFICATES. If any certificate(s)
representing Old Notes have been lost, destroyed or stolen, the holder should
promptly notify the Exchange Agent. The holder will then be instructed as to
the steps that must be taken in order to replace the certificate(s). This
Letter of Transmittal and related documents cannot be processed until the
procedures for replacing lost, destroyed or stolen certificate(s) have been
followed.

     10. SECURITY TRANSFER TAXES. Holders who tender their Old Notes for
exchange will not be obligated to pay any transfer taxes in connection
therewith, except that holders who instruct the Company to register New Notes
in the name of or request that Old Notes not tendered or not accepted in the
Exchange Offer to be returned to, a person other than the registered tendering
holder will be responsible for the payment of any applicable transfer tax
thereon.

         IMPORTANT: THIS LETTER OF TRANSMITTAL (OR FACSIMILE THEREOF),
         OR AN AGENT'S MESSAGE IN LIEU THEREOF, AND ALL OTHER REQUIRED
               DOCUMENTS MUST BE RECEIVED BY THE EXCHANGE AGENT
                      ON OR PRIOR TO THE EXPIRATION DATE.


                                       9


                                                                    Exhibit 99.2


                         NOTICE OF GUARANTEED DELIVERY

                                 For Tender Of

              13 1/2% Series A Senior Subordinated Notes due 2009
                                      of
                       Charles River Laboratories, Inc.


         This Notice of Guaranteed Delivery or one substantially equivalent
hereto must be used to accept the Exchange Offer (as defined below) if (i)
certificates for the Company's (as defined below) 13 1/2% Series A Senior
Subordinated Notes due 2009 (the "Old Notes") are not immediately available,
(ii) Old Notes and any other documents required by the Letter of Transmittal
cannot be delivered to State Street Bank and Trust Company (the "Exchange
Agent") on or prior to the Expiration Date (as defined in the Prospectus
referred to below) or (iii) the procedures for book-entry transfer cannot be
completed on a timely basis. This Notice of Guaranteed Delivery may be
delivered by hand or sent by facsimile transmission, overnight courier, telex,
telegram or mail to the Exchange Agent. See "The Exchange Offer - Guaranteed
Delivery Procedures" in the Prospectus dated ____ _, 1999 (which, together
with the related Letter of Transmittal, constitutes the "Exchange Offer") of
Charles River Laboratories, Inc., a Delaware corporation (the "Company").

<TABLE>

                 The Exchange Agent for the Exchange Offer is:
                     STATE STREET BANK AND TRUST COMPANY.

<S>                               <C>                            <C>
By Hand or Overnight Delivery:      Facsimile Transmissions:     By Registered Or Certified Mail:
                                  (Eligible Institutions Only)
   State Street Bank and Trust                                        State Street Bank and Trust
            Company.                     (617-662-1450)                       Company
   Corporate Trust Department                                        Corporate Trust Department
     Two Avenue de Lafayette         To Confirm by Telephone           Two Avenue de Lafayette
           Fifth Floor              or for Information Call:                 Fifth Floor
      Boston, MA 02111-1724                                             Boston, MA 02111-1724
     Contact: Kellie Mullen              (617-662-1525)                Contact: Kellie Mullen
</TABLE>



<PAGE>


         DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER
THAN AS SET FORTH ABOVE OR TRANSMISSION OF THIS NOTICE OF GUARANTEED DELIVERY
VIA A FACSIMILE TRANSMISSION TO A NUMBER OTHER THAN AS SET FORTH ABOVE WILL
NOT CONSTITUTE A VALID DELIVERY.

         THIS NOTICE OF GUARANTEED DELIVERY IS NOT TO BE USED TO GUARANTEE
SIGNATURES. IF A SIGNATURE ON A LETTER OF TRANSMITTAL IS REQUIRED TO BE
GUARANTEED BY AN "ELIGIBLE INSTITUTION" UNDER THE INSTRUCTIONS THERETO, SUCH
SIGNATURE GUARANTEE MUST APPEAR IN THE APPLICABLE SPACE PROVIDED ON THE LETTER
OF TRANSMITTAL.


                                       2

<PAGE>


                   THE FOLLOWING GUARANTEE MUST BE COMPLETED

                             GUARANTEE OF DELIVERY

                   (Not to be used for Signature Guarantee)



         The undersigned, a firm which is a member of a registered national
securities exchange or a member of the National Association of Securities
Dealers, Inc. or a commercial bank or trust company having an office or
correspondent in the United States, hereby guarantees to deliver to the
Exchange Agent, at one of its addresses set forth above, either the
certificates for all physically tendered Old Notes, in proper form for
transfer, or confirmation of the book-entry transfer of such Old Notes to the
Exchange Agent's account at The Depository Trust Company ("DTC"), pursuant to
the procedures for book-entry transfer set forth in the Prospectus, in either
case together with any other documents required by the Letter of Transmittal,
within five New York Stock Exchange trading days after the date of execution
of this Notice of Guaranteed Delivery.

         The undersigned acknowledges that it must deliver the Old Notes
tendered hereby to the Exchange Agent within the time period set forth above
and that failure to do so could result in a financial loss to the undersigned.

Name of Firm:___________________________   ____________________________________
                                           (Authorized Signature)

Address:________________________________   Title:______________________________

________________________________________   Name:_______________________________
                                       (Zip       (Please type or print)

Area Code and Telephone Number:            Date:_______________________________

- ----------------------------------

NOTE: DO NOT SEND OLD NOTES WITH THIS NOTICE OF GUARANTEED DELIVERY. ACTUAL
SURRENDER OF OLD NOTES MUST BE MADE PURSUANT TO, AND BE ACCOMPANIED BY, A
PROPERLY COMPLETED AND FULLY EXECUTED LETTER OF TRANSMITTAL AND ANY OTHER
REQUIRED DOCUMENTS.


                                       3


                                                                    Exhibit 99.3


                               Offer to Exchange
              13 1/2% Series B Senior Subordinated Notes due 2009
                 (Registered Under The Securities Act of 1933)
                          for Any and All Outstanding
              13 1/2% Series A Senior Subordinated Notes due 2009
                                      of
                       CHARLES RIVER LABORATORIES, INC.


                                To Our Clients:

         Enclosed is a Prospectus, dated _____ _, 1999, of Charles River
Laboratories, Inc., a Delaware corporation (the "Company"), and a related
Letter of Transmittal (which together constitute the "Exchange Offer")
relating to the offer by the Company to exchange its 13 1/2% Series B Senior
Subordinated Notes due 2009 (the "New Notes"), pursuant to an offering
registered under the Securities Act of 1933, as amended (the "Securities
Act"), for a like principal amount of its issued and outstanding 13 1/2%
Series A Senior Subordinated Notes due 2009 (the "Old Notes") upon the terms
and subject to the conditions set forth in the Exchange Offer.

         Please note that the Exchange Offer will expire at 5:00 p.m., New
York City time, on ______, 1999, unless extended.

         The Exchange Offer is not conditioned upon any minimum number of Old
Notes being tendered.

         We are the holder of record and/or participant in the book-entry
transfer facility of Old Notes held by us for your account. A tender of such
Old Notes can be made only by us as the record holder and/or participant in
the book-entry transfer facility and pursuant to your instructions. The Letter
of Transmittal is furnished to you for your information only and cannot be
used by you to tender Old Notes held by us for your account.

         We request instructions as to whether you wish to tender any or all
of the Old Notes held by us for your account pursuant to the terms and
conditions of the Exchange Offer. We also request that you confirm that we may
on your behalf make the representations contained in the Letter of
Transmittal.

         Pursuant to the Letter of Transmittal, each holder of Old Notes will
represent to the Company that (i) the holder is not an "affiliate" of the
Company,


<PAGE>


(ii) any New Notes to be received by it are being acquired in the ordinary
course of its business, and (iii) the holder has no arrangement or
understanding with any person to participate in a distribution (within the
meaning of the Securities Act) of such New Notes. If the tendering holder is a
broker-dealer that will receive New Notes for its own account in exchange for
Old Notes, you will represent on behalf of such broker-dealer that the Old
Notes to be exchanged for the New Notes were acquired by it as a result of
market-making activities or other trading activities, and acknowledge on
behalf of such broker-dealer that it will deliver a prospectus meeting the
requirements of the Securities Act in connection with any resale of such New
Notes. By acknowledging that it will deliver and by delivering a prospectus
meeting the requirements of the Securities Act in connection with any resale
of such New Notes, such broker-dealer is not deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.


                               Very truly yours,




                                       2


                                                                    Exhibit 99.4

                               Offer to Exchange
              13 1/2% Series B Senior Subordinated Notes due 2009
                 (Registered under the Securities Act of 1933)
                          for Any and All Outstanding
              13 1/2% Series A Senior Subordinated Notes due 2009
                                      of
                       CHARLES RIVER LABORATORIES, INC.



                   To Registered Holders and The Depository
                          Trust Company Participants:


         We are enclosing herewith the material listed below relating to the
offer by Charles River Laboratories, Inc., a Delaware corporation (the
"Company"), to exchange its 13 1/2% Series B Senior Subordinated Notes due
2009 (the "New Notes"), pursuant to an offering registered under the
Securities Act of 1933, as amended (the "Securities Act"), for a like
principal amount of its issued and outstanding 13 1/2% Series A Senior
Subordinated Notes due 2009 (the "Old Notes") upon the terms and subject to
the conditions set forth in the Company's Prospectus, dated _______ __, 1999,
and the related Letter of Transmittal (which together constitute the "Exchange
Offer").

         Enclosed herewith are copies of the following documents:

         1.   Prospectus dated _____ __, 1999;

         2.   Letter of Transmittal;

         3.   Notice of Guaranteed Delivery;

         4.   Instruction to Registered Holder and/or Book-Entry Transfer
              Participant from Owner; and

         5.   Letter which may be sent to your clients for whose account you
              hold Old Notes in your name or in the name of your nominee, to
              accompany the instruction form referred to above, for obtaining
              such client's instruction with regard to the Exchange Offer.


<PAGE>



         We urge you to contact your clients promptly. Please note that the
Exchange Offer will expire at 5:00 p.m., New York City time, on ______ __,
1999 unless extended.

         The Exchange Offer is not conditioned upon any minimum number of Old
Notes being tendered.

         Pursuant to the Letter of Transmittal, each holder of Old Notes will
represent to the Company that (i) the holder is not an "affiliate" of the
Company, (ii) any New Notes to be received by it are being acquired in the
ordinary course of its business, and (iii) the holder has no arrangement or
understanding with any person to participate in a distribution (within the
meaning of the Securities Act) of such New Notes. If the tendering holder is a
broker-dealer that will receive New Notes for its own account in exchange for
Old Notes, you will represent on behalf of such broker-dealer that the Old
Notes to be exchanged for the New Notes were acquired by it as a result of
market-making activities or other trading activities, and acknowledge on
behalf of such broker-dealer that it will deliver a prospectus meeting the
requirements of the Securities Act in connection with any resale of such New
Notes. By acknowledging that it will deliver and by delivering a prospectus
meeting the requirements of the Securities Act in connection with any resale
of such New Notes, such broker-dealer is not deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.

         The enclosed Instruction to Registered Holder and/or Book-Entry
Transfer Participant from Owner contains an authorization by the beneficial
owners of the Old Notes for you to make the foregoing representations.

         The Company will not pay any fee or commission to any broker or
dealer or to any other persons (other than the Exchange Agent) in connection
with the solicitation of tenders of Old Notes pursuant to the Exchange Offer.
The Company will pay or cause to be paid any transfer taxes payable on the
transfer of Old Notes to it, except as otherwise provided in Instruction 10 of
the enclosed Letter of Transmittal.

         Additional copies of the enclosed material may be obtained from the
undersigned.

                                   Very truly yours,

                                        STATE STREET BANK AND TRUST COMPANY


NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL
CONSTITUTE YOU THE AGENT OF CHARLES RIVER LABORATORIES, INC. OR
STATE STREET BANK AND TRUST COMPANY OR AUTHORIZE YOU TO USE


                                       2

<PAGE>


ANY DOCUMENT OR MAKE ANY STATEMENT ON THEIR BEHALF IN CONNECTION WITH THE
EXCHANGE OFFER OTHER THAN THE DOCUMENTS ENCLOSED HEREWITH AND THE STATEMENTS
CONTAINED THEREIN.


                                       3


                                                                   Exhibit 99.5

                    INSTRUCTION TO REGISTERED HOLDER AND/OR
              BOOK-ENTRY TRANSFER FACILITY PARTICIPANT FROM OWNER
                                      OF
                       CHARLES RIVER LABORATORIES, INC.


              13 1/2% Series A Senior Subordinated Notes due 2009
                              (the "Old Notes")


To Registered Holder and/or Participant of the Book-Entry Transfer
Facility:

         The undersigned hereby acknowledges receipt of the Prospectus dated
_____ __, 1999 (the "Prospectus") of Charles River Laboratories, Inc., a
Delaware corporation (the "Company"), and the accompanying Letter of
Transmittal (the "Letter of Transmittal"), that together constitute the
Company's offer (the "Exchange Offer"). Capitalized terms used but not defined
herein have the meanings ascribed to them in the Prospectus or the Letter of
Transmittal.

         This will instruct you, the registered holder and/or book-entry
transfer facility participant, as to the action to be taken by you relating to
the Exchange Offer with respect to the Old Notes held by you for the account
of the undersigned.

         The aggregate face amount of the Old Notes held by you for the
account of the undersigned is (fill in amount):

         $___________ of the 13 1/2%  Series A Senior Subordinated Notes due
2009

         With respect to the Exchange Offer, the undersigned hereby instructs
you (check appropriate box):

         |_| To TENDER the following Old Notes held by you for the account of
the undersigned (insert principal amount of Old Notes to be tendered, if any):

         $___________ of the 13 1/2% Series A Senior Subordinated Notes due 2009


<PAGE>


         [ ] NOT to TENDER any Old Notes held by you for the account of the
undersigned.

         If the undersigned instructs you to tender the Old Notes held by you
for the account of the undersigned, it is understood that you are authorized
to make, on behalf of the undersigned (and the undersigned, by its signature
below, hereby makes to you), the representations and warranties contained in
the Letter of Transmittal that are to be made with respect to the undersigned
as a beneficial owner, including but not limited to the representations, that
(i) the holder is not an "affiliate" of the Company, (ii) any New Notes to be
received by the holder are being acquired in the ordinary course of its
business, and (iii) the holder has no arrangement or understanding with any
person to participate in a distribution (within the meaning of the Securities
Act) of such New Notes. If the undersigned is a broker-dealer that will
receive New Notes for its own account in exchange for Old Notes, it represents
that such Old Notes were acquired as a result of market-making activities or
other trading activities, and it acknowledges that it will deliver a
prospectus meeting the requirements of the Securities Act in connection with
any resale of such New Notes. By acknowledging that it will deliver and by
delivering a prospectus meeting the requirements of the Securities Act in
connection with any resale of such New Notes, such broker-dealer is not deemed
to admit that it is an "underwriter" within the meaning of the Securities Act
of 1933, as amended.


                                       2


<PAGE>


                                            SIGN HERE


Name of beneficial owner(s):
                            ----------------------------------------------------

Signature(s):
             -------------------------------------------------------------------

Name(s) (please print):
                       ---------------------------------------------------------

Address
       -------------------------------------------------------------------------

- --------------------------------------------------------------------------------

Telephone Number:
                 ---------------------------------------------------------------

Taxpayer Identification or Social Security Number:
                                                  ------------------------------

- --------------------------------------------------------------------------------

Date:
     ---------------------------------------------------------------------------



                                       3

<TABLE> <S> <C>


<ARTICLE> 5
<LEGEND>
The schedule contains summary information extracted from the consolidated
statement of earnings for the nine months ended September 30, 1999 and the
consolidated balance sheet at September 30, 1999 and is qualified in its
entirety by reference to such financial statements.
</LEGEND>
<CIK>                         1097797
<NAME>                        CHARLES RIVER LABORATORIES, INC.
<MULTIPLIER>                              1,000

<S>                              <C>                 <C>                 <C>                 <C>                 <C>
<PERIOD-TYPE>                            12-MOS              12-MOS              12-MOS               9-MOS               9-MOS
<FISCAL-YEAR-END>                   DEC-28-1996         DEC-27-1997         DEC-26-1998         DEC-26-1998         DEC-25-1999
<PERIOD-END>                        DEC-28-1996         DEC-27-1997         DEC-26-1998         SEP-26-1998         SEP-25-1999
<CASH>                                        0              17,915              24,811                   0               3,457
<SECURITIES>                                  0                   0                   0                   0                   0
<RECEIVABLES>                                 0              28,280              32,466                   0              33,820
<ALLOWANCES>                                  0                 688                 898                   0                 854
<INVENTORY>                                   0              28,904              30,731                   0              28,577
<CURRENT-ASSETS>                              0              83,323              97,214                   0              77,303
<PP&E>                                        0              76,889              82,690                   0              79,349
<DEPRECIATION>                                0               8,320               9,168                   0                   0
<TOTAL-ASSETS>                                0             196,211             233,410                   0             210,371
<CURRENT-LIABILITIES>                         0              41,577              59,792                   0              56,707
<BONDS>                                       0                   0                   0                   0                   0
                         0                   0                   0                   0                   0
                                   0                   0                   0                   0                   0
<COMMON>                                      0                   1                   1                   0                   1
<OTHER-SE>                                    0              17,836              17,836                   0              17,836
<TOTAL-LIABILITY-AND-EQUITY>                  0             196,211             233,410                   0             210,371
<SALES>                                 155,604             170,713             193,301             145,519             161,096
<TOTAL-REVENUES>                        155,604             170,713             193,301             145,519             161,096
<CGS>                                    97,777             111,460             122,547              91,041              97,230
<TOTAL-COSTS>                            97,777             111,460             122,547              91,041              97,230
<OTHER-EXPENSES>                         33,685              37,177              35,429              26,238              30,528
<LOSS-PROVISION>                              0                   0                   0                   0                   0
<INTEREST-EXPENSE>                          491                 501                 421                 311                 207
<INCOME-PRETAX>                          15,245              15,340              23,378              18,459              19,952
<INCOME-TAX>                             10,889               8,449              14,123              11,280              16,903
<INCOME-CONTINUING>                      15,245              15,340              23,378              18,459              19,952
<DISCONTINUED>                                0                   0                   0                   0                   0
<EXTRAORDINARY>                               0                   0                   0                   0                   0
<CHANGES>                                     0                   0                   0                   0                   0
<NET-INCOME>                             15,245              15,340              23,378              18,459              19,952
<EPS-BASIC>                                 0<F1>               0<F1>               0<F1>               0<F1>               0<F1>
<EPS-DILUTED>                                 0<F1>               0<F1>               0<F1>               0<F1>               0<F1>


<FN>
<F1>The Company's equity is not publicly stated.
</FN>

</TABLE>


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