WESTON ROY F INC
10-K405, 1999-03-30
HAZARDOUS WASTE MANAGEMENT
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<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM 10-K

[X]    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
       EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 1998
                                       OR
       TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
       EXCHANGE ACT OF 1934
       FOR THE TRANSITION PERIOD FROM _________________TO_________________

                          COMMISSION FILE NUMBER 0-4643

                               ROY F. WESTON, INC.

             (Exact name of registrant as specified in its charter)

          PENNSYLVANIA                                           23-1501990
  (State or other jurisdiction                                (I.R.S. Employer
of incorporation or organization)                            Identification No.)

             1400 WESTON WAY
              P.O. BOX 2653
       WEST CHESTER, PENNSYLVANIA                                       19380
(Address of principal executive offices)                             (Zip Code)

       Registrant's telephone number, including area code: (610) 701-3000
          Securities registered pursuant to Section 12(b) of the Act:
                                      NONE
          Securities registered pursuant to Section 12(g) of the Act:
                SERIES A COMMON STOCK (PAR VALUE $.10 PER SHARE)
                                (Title of Class)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes x No _

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.[X]

The aggregate market value of the voting stock held by non-affiliates of the
Registrant, based upon the closing sale price of Series A Common Stock reported
in the NASDAQ National Market System on March 10, 1999, was approximately
$13,901,000. Solely for the purposes of calculation, all executive officers and
directors of the Company and all beneficial owners of more than 10% of the
Company's stock were considered affiliates. As of March 10, 1999, the Registrant
had outstanding 7,857,973 shares of Series A Common Stock ($.10 par value) and
2,089,019 shares of Common Stock ($.10 par value).

                       DOCUMENTS INCORPORATED BY REFERENCE
Portions of the Company's 1998 Annual Report to Shareholders are incorporated by
reference into Part II of this report. Portions of the Company's Proxy Statement
to be filed with the Securities and Exchange Commission for the Annual Meeting
of Shareholders expected to be held on May 10, 1999, are incorporated by
reference into Part III of this report.



<PAGE>   2



                                TABLE OF CONTENTS

                                     PART I

ITEM 1.           BUSINESS                                                    3

ITEM 2.           PROPERTIES                                                 11

ITEM 3.           LEGAL PROCEEDINGS                                          11

ITEM 4.           SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS        11

                                     PART II

ITEM 5.           MARKET FOR THE REGISTRANT'S COMMON EQUITY AND
                  RELATED STOCKHOLDER MATTERS                                12

ITEM 6.           SELECTED FINANCIAL DATA                                    12

ITEM 7.           MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                  CONDITION AND RESULTS OF OPERATIONS                        12

ITEM 7A.          QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT
                  MARKET RISK                                                12

ITEM 8.           FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA                12

ITEM 9.           CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON
                  ACCOUNTING AND FINANCIAL DISCLOSURE                        12

                                    PART III

ITEM 10.          DIRECTORS AND EXECUTIVE OFFICERS                           13

ITEM 11.          EXECUTIVE COMPENSATION                                     13

ITEM 12.          SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
                  AND MANAGEMENT                                             13

ITEM 13.          CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS             13

                                     PART IV

ITEM 14.          EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS
                   ON FORM 8-K                                               14



                                       1
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FORWARD LOOKING STATEMENTS

         From time to time, the Company, its management, or other company
representatives may make or publish statements which contain projections,
beliefs, expectations, predictions or intentions relating to anticipated
financial performance, business prospects, potential contract value, business
strategy and plans, technological developments, and other matters. The Private
Securities Litigation Reform Act of 1995 provides a safe harbor for these
forward looking statements. In order to comply with the terms of the safe
harbor, the Company notes that a number of risk factors and uncertainties could
cause the Company's actual results, experience or outcome to differ materially
from projections, beliefs, expectations, predictions or intentions expressed in
forward looking statements, including such statements included or incorporated
by reference in this report. These risks and uncertainties, which may affect the
operations, performance, development and results of the Company's business,
include, but are not limited to, the following (as well as those identified
elsewhere in this report):

- -    The highly competitive marketplace in which the Company's operates.

- -    Changes in and levels of enforcement of federal, state, and local
     environmental legislation and regulations.

- -    The Company's ability to obtain new contracts from existing as well as new
     clients, and the uncertain timing of awards and contracts.

- -    The Company's ability to execute new projects and those in backlog within
     reasonable cost estimates, as well as other contract performance risks.

- -    Funding appropriation, funding delay, and the issuance of work orders on
     government projects.

- -    The Company's ability to achieve any planned overhead or other cost
     reductions while maintaining adequate work flow.

- -    The Company's ability to successfully implement its readiness program for
     Y2K issues.

- -    The Company's ability to obtain adequate financing for its current
     operations and future expansion, including adequate financing for the
     Company's acquisition strategy.

- -    The Company's ability to execute its strategic plan through successful
     marketing activities and continued cost containment.

- -    The nature of the Company's work with hazardous materials, toxic wastes,
     and other pollutants, and the potential for uninsured claims or claims in
     excess of insurance limits, including professional liability and pollution
     claims.

- -    The Company's ability to conclude and implement acquisitions of other
     businesses consistent with the Company's acquisition strategy.

- -    The Company's ability to retain key personnel.

         The Company disclaims any intent or obligation to update forward
looking statements.

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<PAGE>   4

                                     PART I

ITEM 1.     BUSINESS

                                     GENERAL

        Roy F. Weston, Inc. (the Company) is a professional services
organization that provides a broad range of consulting, engineering and design,
environmental construction, and facilities, program and business management
services to solve problems associated with air, water and land pollution;
hazardous material and toxic waste treatment and disposal; workplace hazards;
product use; and energy conservation. The Company's services include development
of cost-effective technologies and solutions to environmental problems;
selection of sites, obtaining of governmental permits, and the preparation of
specifications and designs for constructing remedial systems and facilities; and
construction, startup and operation of facilities. These services are made
available to governmental and industrial clients through the Company's staff of
professional and support personnel in offices worldwide. The Company assists its
clients from the initial identification and definition of a problem, through the
planning, evaluation and design stages, to the implementation of cost-effective,
technologically feasible, and politically acceptable solutions.

        Since its incorporation in 1957, the Company has been a pioneer in
providing solutions to environmental, health and safety problems. As
environmental concerns have grown in complexity and become the subject of
heightened public awareness and extensive governmental regulation, the Company's
strategy has been to build an organization with a high level of sophisticated
professional skills and a broad range of scientific, technological and
management resources. The Company uses a total systems approach that involves
studying its clients' needs and providing cost-effective, customized solutions
that address those needs.

        The Company's business strategy includes regular evaluation of
opportunities to acquire, make investments in, or enter into joint ventures or
other strategic alliances with, companies whose business complement the
Company's business, some of which could be material.

                                    SERVICES

        The Company is pursuing infrastructure redevelopment as its primary
market focus. Infrastructure involves physical resources - structures,
facilities, plants and equipment, as well as land and other natural resources
that are vital to the economic life of society. Redevelopment entails undoing
the adverse consequences of past development activities and restoring damaged
resources to productive uses. Infrastructure redevelopment helps clients decide
whether and how to make positive changes in the character or condition of
something they own.

        Infrastructure redevelopment is being pursued by the Company for a
number of reasons. Demand for regulatory-driven environmental services, which
are still a major source of business for the Company, has been declining. While
the Company intends to maintain such services, it sees its long term
opportunities in infrastructure redevelopment services where the market has been
growing at an average rate of nearly 10% annually.

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<PAGE>   5

        The Company provides its services by combining its professional skills
and technological resources in an integrated systems approach, which uses
technical information and program management capabilities as well as cost
control systems. The Company's service lines include infrastructure
redevelopment, federal program management, and knowledge systems and solutions.
Information about net revenues, segment profit (loss) and total assets for 1998
is included in Note 17 to the Consolidated Financial Statements on page 36 of
the Company's 1998 Annual Report to Shareholders and is incorporated herein by
reference.

INFRASTRUCTURE REDEVELOPMENT

        The Company's services involve the identification and characterization
of a client's problems; the evaluation of alternative solutions; and the
selection, design and development of a technologically feasible, cost-effective,
and politically acceptable solution. The Company's trained professionals who
provide these services are drawn from many different scientific and
technological disciplines to assess the long-term effects and the risks
associated with the environmental impact of clients' activities and products. In
performing feasibility studies and environmental impact and risk assessments,
the Company's professionals examine the relative effectiveness of various
technological approaches for achieving permanent solutions and ensuring that
additional environmental concerns are not created in the course of solving the
primary problem.

        The Company applies its skills to all phases of environmental matters
and other problems, including those relating to infrastructure redevelopment,
major program management, compliance and air quality management services.

        INFRASTRUCTURE REDEVELOPMENT CONSULTING. Infrastructure redevelopment
consulting comprises a broad range of managerial and technical consulting
services that allow federal, municipal and industrial clients to revitalize
systems and facilities to profitable and sustainable use. Infrastructure,
including water/wastewater systems, commercial and industrial real estate,
waterways and transportation systems, are expected to require continually
increasing redevelopment to maintain economic growth, private investment and
commerce. In addition, the Company provides the ability for clients to outsource
the operation and maintenance of water and wastewater facilities that are not
part of the client's core business.

        COMPLIANCE SERVICES. Compliance services include identification and
interpretation of regulations, technical assessment of environmental issues,
technology identification and evaluation, implementation planning/management,
emergency response and control, and long-term monitoring and maintenance of
compliance. The Company believes that much of the compliance consulting market,
driven primarily by regulatory issues, faces increasing price-sensitivity and
slow growth.

        AIR QUALITY MANAGEMENT SERVICES. The Company's air quality management
services include air quality management consulting (permitting, dispersion
modeling, and management consulting); ambient monitoring (meteorological, air
quality, and air toxics monitoring); and emission testing (continuous emission
monitoring, compliance testing performance guarantee testing, and air pollution
control design testing).

                                       4
<PAGE>   6

        INFRASTRUCTURE REDEVELOPMENT CONSTRUCTION. In infrastructure
redevelopment construction, the Company is primarily focused on two areas, which
the Company believes are likely to experience strong growth in the near future:
alternative delivery systems for water/wastewater and dredged materials
management. The emerging nature of these markets and the prospective
design-build-own-operate structure could yield significant high margin
opportunities for the Company.

        REMEDIATION CONSTRUCTION. Remediation construction services include site
investigation, engineering, design, construction, cleanup, and operations and
maintenance.

        IMPAIRED PROPERTIES REDEVELOPMENT. Impaired properties redevelopment is
at present a relatively small market, but a very attractive one. The Company
believes it can establish a leadership position in this emerging market where
there is no current entrenched leader. The Company expects to focus on projects
where net liabilities can be shifted to net assets through innovative regulatory
and remediation approaches.

        HIGH HAZARD MANAGEMENT AND REMEDIATION. High-hazard remediation and
management services include cleanup of unexploded ordnance (UXO), humanitarian
demining, nuclear decontamination and decommissioning (D&D), chemical
demilitarization, and radioactive waste remediation. The Company's experience
and relationships position it to capitalize on the growing funding devoted to
solving these most difficult environmental problems.

FEDERAL PROGRAMS

        Federal program management involves all phases of large-scale
environmental, health and safety problems of industry and government. The
Company has the resources and technical abilities to accept overall
responsibility for siting, evaluating, designing, implementing, and managing
environmental programs, and to apply its diversified services, as appropriate,
in an integrated systems approach. The Company provides the management systems
and the direct involvement of its most senior management to deal with the
complexities of the underlying environmental problems, as well as the commitment
of large numbers of personnel at geographically dispersed sites for extended
time frames. The Company typically bids for contracts as the prime contractor
and forms subcontractor teams in those instances where subcontractors provide
expertise and staffing that substantially enhance the Company's ability to
obtain and perform contracts. Subcontractors may, from time to time, include
certain competitors of the Company.

KNOWLEDGE SYSTEMS AND SOLUTIONS

        Knowledge Systems and Solutions services include decision support
systems (DSS), such as Geographic Information Systems (GIS), Facilities
Management Systems (FM), and Workflow Automation to assist clients with managing
geographically distributed assets (e.g., water utilities, gas transmission
companies, etc.) The Company's strategic management consulting helps clients
manage health, safety, environmental quality, and resource sustainability issues
for increased efficiency and cost effectiveness, as well as evaluate and
implement development and redevelopment options. On-line products and services,
such as Internet-based virtual communities, intranet- or extranet-based virtual
private networks, and other sophisticated on-line products and services help
clients more effectively collaborate, access information, and transact business
over electronic networks.

                                       5
<PAGE>   7

                             CUSTOMERS AND MARKETING

        The Company's marketing strategy emphasizes its ability to offer a broad
range of specialized services designed to meet the needs of its clients in a
timely and cost-efficient manner. The Company has the capability to undertake
not only small tasks requiring a few professionals, but also management,
staffing, design and implementation of major projects that may last for several
years and involve many employees in several geographic locations.

        The Company's marketing efforts are directed from offices nationwide to
three client sectors: private industry; public works and local government; and
the federal government. The Company's senior professionals are responsible for
directing the execution of projects, monitoring quality assurance, and
integrating the delivery of the Company's services. They also develop and
maintain long-term working relationships with clients' management. The Company
participates in industrial trade shows and technical conferences concerning
environmental and health and safety issues, and sponsors related technical
seminars.

FEDERAL

        In the federal sector, the Company performs contracts for the U.S.
Department of Defense (DOD), the U.S. Environmental Protection Agency (EPA) and
the U.S. Department of Energy (DOE), as well as for other federal agencies. The
Company develops comprehensive waste management and remediation programs at many
priority sites throughout the country.

        The Company derived 55%, 54% and 56% of its consolidated gross revenues
from the federal government for the years ended December 31, 1996, 1997 and
1998, respectively. Gross revenue percentages from the DOD, EPA and DOE for each
of the fiscal years are as follows:

                   PERCENTAGES OF CONSOLIDATED GROSS REVENUES
                         FOR THE YEARS ENDED DECEMBER 31

<TABLE>
<CAPTION>
                             1996              1997              1998
                             ---              -----            ------
<S>                          <C>               <C>              <C>
          DOD                 21%                21%              25%
          EPA                 18%                20%              21%
          DOE                 13%                11%               8%
          OTHER                3%                 2%               2%
                             ---              -----            -----
                              55%                54%              56%
</TABLE>

        The Company is a major provider of services to the federal government
and thus is subject to audit with respect to costs and fees charged to the
federal government. Revenues associated with federal overhead rates under
government cost reimbursable contracts are adjusted when variances are
determined on at least an annual basis. Provisions for losses on contracts are
recorded when they are identified. As a result of its government contracting
business, the Company is, has been, and may in the future be subject to audits
and investigations by government agencies. In addition to potential damage to
the Company's business reputation, the failure by the Company to comply with the
terms of any of its government contracts could also result in fines, or
penalties or in the Company's suspension or debarment from future government
contracts for a significant period of time. Such fines and penalties, or the
Company's suspension or 



                                       6
<PAGE>   8

debarment could have a material adverse effect on the Company's business,
particularly in light of the importance to the Company of its work for various
government agencies.

INDUSTRY

        The Company provides a full range of services for industrial clients.
Service to industrial clients provided 30%, 30% and 26% of the Company's gross
revenues in 1996, 1997 and 1998, respectively. In addition to complying with
regulatory requirements, companies are recognizing that the environmental impact
must be considered from the inception of a product, throughout its use and final
disposal. Corporate clients, which range from small business concerns to Fortune
100 companies, are offered a wide range of consulting, construction, remediation
and redevelopment; and knowledge systems and solutions services. Market segments
served include manufacturing, chemicals and allied products, petroleum, forest
products, and utilities.

PUBLIC WORKS AND LOCAL GOVERNMENT

        The Company provides consulting and construction redevelopment services
to many state and local governments and agencies. Services to public works and
local government clients provided 15%, 16% and 18% of the Company's gross
revenues in 1996, 1997 and 1998, respectively. A growing number of cities,
regional authorities, and state governments are instituting long-range programs
to update essential facilities. Because these projects require comprehensive
planning and engineering, they are expected to continue to be an important
component of the Company's business. Typical projects include the design of
water supply and wastewater systems; solid waste management; asbestos
management; computer-based geographic mapping, and landfill design.

                                   COMPETITION

        The Company's markets are very competitive and require highly skilled,
experienced technical and management personnel. Competition is based on, among
other things, reputation, quality of service, price, expertise and local
presence. In each of its specific service areas, the Company competes with many
firms that are both larger and smaller than the Company, although no firm
currently dominates any significant portion of those service areas. Many of
these competitors have greater financial resources than the Company.

                             PATENTS AND TECHNOLOGY

        The Company owns six patents on certain remediation technologies and has
filed additional patent applications. The Company also claims copyright and
trade secret protection on certain of its computer software, publications and
technologies. The Company does not believe that such patents and copyrights are
a material factor in its business.

                                     BACKLOG

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<PAGE>   9

        The Company's net contract backlog (excluding estimated project expenses
that are directly passed through to customers) was $61.0 million and $65.3
million at December 31, 1998 and 1997, respectively. Additionally, the Company
derives revenues from open order contracts and from activities related to
emergency response. As work assignments are approved and funded, the Company
includes these amounts in the net contract backlog. As is customary in the
industry, contracts are subject to cancellation by the customer, changes in
scope of work, and delays in project startup, therefore all amounts reflected in
backlog may not be realized as net revenues. The Company anticipates that the
majority of its backlog will be realized in the current fiscal year.

                        POTENTIAL LIABILITY AND INSURANCE

        A substantial portion of the Company's gross revenues is derived from
work involving hazardous materials, toxic wastes, and other pollutants. Such
efforts frequently entail significant risks of liability to the Company for
environmental damage, personal injury, and fines and costs imposed by regulatory
agencies. A substantial number of the Company's contracts require
indemnification of a client for performance claims, damages or losses incurred
during the performance of the Company's operations.

        The Company has been able to insure against most liabilities it incurs
in connection with the conduct of its business. The Company has obtained
coverage with commercial carriers to insure against pollution liability claims.
Although this insurance covers many of the Company's environmental exposures,
there are instances where project-specific pollution insurance policies are
necessary. The Company will continue to evaluate exposures associated with each
project to determine if additional coverage is necessary. The Company continues
to be partially self-insured through its subsidiary, Cardinal Indemnity Company
of North America (Cardinal), a wholly-owned insurance company. Cardinal provides
professional liability and pollution coverage for deductible amounts under the
Company's commercial insurance coverage.

        While the insurance carried by the Company may not be sufficient to
cover all claims that may arise, and while insurance carriers may not continue
to make coverage available to the Company, management believes it has provided
an adequate level of insurance.

        The Company has also attempted to contractually protect itself through
agreements with its clients to limit its liability and indemnify the Company,
although the Company has not always been successful in obtaining such
agreements. Most of the Company's contracts with EPA involving Superfund monies
and some state contracts that employ federal Superfund dollars contain
provisions whereby the respective governmental agency agrees to indemnify the
Company for third-party claims to the extent that such claims are not covered by
insurance and appropriated funds are available, although the Company does not
receive any assurance that any such appropriated funds will be made available.
EPA has issued Final Response Action Contractor Indemnification Guidance (the
Indemnification Guidance) applicable to contracts signed on or after October 16,
1986, the terms of which limit EPA's contractor indemnification under certain
Superfund contracts retroactively to 1986, and prospectively, under certain
circumstances. The Indemnification Guidance states that future contracts will
not provide for indemnification unless EPA is unable to obtain responsible,
competitive proposals without such an indemnification.



                                       8
<PAGE>   10

        The Company sometimes contracts with DOE to perform remedial work at
various DOE facilities within the United States. On occasion, these contracts
may involve the handling or other disposition of radioactive materials. In these
contracts, DOE typically provides the Company with protection from potential
third party claims arising out of "nuclear incidents," by including an
indemnification clause authorized under the Price Anderson Act of 1988. The
indemnity provides over $9 billion in "nuclear hazards" coverage. Congress is
currently considering an extension of the Price Anderson Act, which will expire
on August 1, 2002.

        The Company has also developed and implemented improvements to its
quality assurance and health and safety programs. These programs establish
certain minimum requirements for all project work and provide guidance for the
development of quality assurance plans and health and safety plans on all
projects. The objective of the quality assurance program is to provide assurance
that project performance is of appropriate quality for the project requirements.
The objective of the health and safety program is to protect project personnel
from exposure to hazardous substances and situations. The scope of both programs
includes the establishment of policy and procedures, staff training and
operational review and audit.

        The Company and its employees are subject to various state, local, and
federal licenses, laws and regulations, and believes that it is in substantial
compliance with those requirements.

                                    PERSONNEL

        As of December 31, 1998, the Company had approximately 1,600 employees,
many of whom had advanced degrees in a variety of technical disciplines. Of
these, 34 employees held doctorates, 246 held master's degrees, 110 were
registered professional engineers, and 14 were diplomates of the American
Academy of Environmental Engineers. The Company's ability to remain competitive
depends on its ability to attract and retain qualified personnel.

                                   REGULATIONS

        Demand for the Company's services is affected by laws and regulations,
the reauthorization, modification or elimination of which could significantly
affect the Company's business. The reauthorization of several major federal
environmental laws that have a significant impact on the work of the Company
remains on the agenda of Congress. These include statutes that:

     -    Protect the chemical, physical and biological integrity of water in
          the United States (the Clean Water Act of 1977 and associated laws);

     -    Regulate the handling of hazardous waste and mandate state oversight
          of solid waste (the Resource Conservation and Recovery Act of 1976);
          and,

     -    Regulate the identification, remediation and accountability for
          hazardous waste sites (the Superfund Amendments and Reauthorization
          Act of 1986).

        In addition, administrative regulations mandated by the 1990 amendments
to the Clean Air Act are likely to play a significant role in the Company's
services to its industrial clients in the areas of emission 



                                       9
<PAGE>   11

and ambient air monitoring, air quality modeling and permitting, and assistance
with compliance certification. In addition, new federal and state regulations
are continually being considered which, if adopted, could materially impact the
Company's business.

        The principal federal laws that affect the Company's business are:

        THE COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION, AND LIABILITY
ACT OF 1980 (CERCLA OR SUPERFUND) AND SUPERFUND AMENDMENTS AND REAUTHORIZATION
ACT (SARA) OF 1986: CERCLA addresses past waste disposal practices by providing
means for identifying and remediating hazardous waste sites. The law authorizes
EPA to compel responsible parties to remediate abandoned sites. Where initial
enforcement actions would result in lengthy delays or where responsible parties
cannot readily be identified, CERCLA authorizes funds for cleanups. Congress
enacted SARA in 1986 to amend CERCLA and reauthorize Superfund. SARA strengthens
EPA's authority to conduct short- and long-term enforcement and expands state
involvement in the cleanup process. SARA also expands EPA's commitment to
research and development, training, health assessments, and public
participation. Sites considered to be most in need of remediation are ranked on
EPA's National Priorities List (NPL). By March 1999, some 1,204 federal and
nonfederal sites were listed or proposed for the NPL, and some 10,500 other
hazardous waste sites remained on the CERCLA inventory of potential trouble
spots.

        THE CLEAN WATER ACT (CWA): Amended in February 1987, the CWA authorized
federal revolving loan funds through 1996 for construction grants and startup
money to build wastewater treatment plants. Additional funds were appropriated
for fiscal years 1997, 1998 and 1999. The Company believes that the CWA is
accelerating the market for the municipal wastewater treatment plant design and
construction services provided by the Company. Controls imposed by the CWA on
toxic effluents also are stimulating industrial expenditures.

        THE RESOURCE CONSERVATION AND RECOVERY ACT OF 1976 (RCRA): RCRA controls
the present and future management of newly generated hazardous wastes by
mandating that private industry -- generators, transporters and disposers --
monitor and regulate their disposal of such wastes. As a result of the growing
emphasis on the minimization of industrial process wastes, the increasing
shortage of hazardous waste management facilities, and the considerable costs
associated with disposal, RCRA will continue to be a key regulatory program.

        THE CLEAN AIR ACT (CAA) AND CLEAN AIR ACT AMENDMENTS (CAAA): The CAAA of
1990 charged EPA with promulgating more than 400 regulations and developing
guidelines and procedures in the ensuing 10 years. The sweeping provisions of
the CAAA are designed to diminish three major threats to the environment: acid
rain, urban air pollution, and air toxic emissions. The revisions also establish
a national permit program and a stronger enforcement program to make the CAA
easier to monitor and ensure compliance. The CAA and the CAAA should continue to
increase the Company's activities in emission and ambient air monitoring, air
quality modeling, and permitting assistance to its industrial clients.
Compliance certification, including the development and implementation of data
management and reporting systems, should expand the Company's services to
industry.

        The Company is pursuing business opportunities related to the
restoration and development of environmentally impaired properties, sometimes
referred to as "Brownfields." To the extent it does so as an investor or lender,
it and other companies in this arena may be affected by the "Asset



                                       10
<PAGE>   12

Conservation, Lender Liability and Deposit Insurance Protection Act of 1996."
This federal law, and similar state laws, may limit to some degree the Company's
potential liability under CERCLA, and RCRA (and State counterparts) as related
to its brownfields work, should it ultimately need to take title to or obtain an
ownership interest in the property in connection with efforts to recover on its
loan or investment.

        The Company believes that in addition to services required by CERCLA,
RCRA, CWA and CAA, other federal laws affect demand for the Company's services
in the private and public sectors. These include the Safe Drinking Water Act,
the National Environmental Policy Act, the Nuclear Waste Policy Act, the Toxic
Substances Control Act, the Occupational Safety and Health Act, the Intermodal
Surface Transportation and Efficiency Act, the Federal Facilities Compliance
Act, and the Energy Policy Act.

ITEM 2.     PROPERTIES

        The Company's principal offices are located on a 53-acre tract in West
Whiteland Township, Chester County, Pennsylvania, in the suburbs of
Philadelphia, and include five major buildings providing a total of
approximately 150,000 square feet of space.

        The Company also leases an aggregate of approximately 460,000 square
feet of office space in offices located in 25 states and the District of
Columbia. Aggregate lease payments in 1998 were $12.2 million, of which $7.5
million were subject to direct reimbursement from projects. Approximately
116,000 square feet of such space has been subleased to third parties. These
leases for office facilities are generally for 5 years or less.


ITEM 3.     LEGAL PROCEEDINGS

        The Company is subject to certain claims and lawsuits in connection with
work performed in the ordinary course of its business. In the opinion of
management, such claims and lawsuits currently pending are either adequately
covered by insurance or will not result in a material adverse effect on the
financial position of the Company.

ITEM 4.     SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

        None.


                                       11
<PAGE>   13

                                     PART II

ITEM 5.  MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
         MATTERS

        Information with respect to this item is incorporated by reference
herein from the information in the Company's 1998 Annual Report to Shareholders
in Notes 6 and 7 to the Consolidated Financial Statements on pages 25 to 27 and
under the headings "Company Stock Listing" and "Stock History" on the inside
back cover.


ITEM 6.  SELECTED FINANCIAL DATA

        Information with respect to this item is incorporated by reference
herein from the information in the Company's 1998 Annual Report to Shareholders
on page 15.

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

        Information with respect to this item is incorporated by reference
herein from the information in the Company's 1998 Annual Report to Shareholders
on pages 9 to 14.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

        None.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

        (a) Information with respect to this item is incorporated by reference
herein from the information in the Company's 1998 Annual Report to Shareholders
on pages 15 to 37.

        (b) Selected Quarterly Financial Data (Unaudited) are set forth in Note
18 to the Consolidated Financial Statements contained in the Company's 1998
Annual Report to Shareholders on page 37 and are incorporated by reference
herein.

ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
         FINANCIAL DISCLOSURE

        None.


                                       12
<PAGE>   14

                                    PART III

ITEM 10.    DIRECTORS AND EXECUTIVE OFFICERS

        Information with respect to this item is set forth in the Company's
definitive Proxy Statement, (the "Proxy Statement") to be filed with the
Securities and Exchange Commission, for the Annual Meeting of Shareholders
expected to be held on May 10, 1999, under the headings "Election of Directors",
"Executive Management" and "Section 16(a) Beneficial Ownership Reporting
Compliance" and is incorporated herein by reference.


ITEM 11.    EXECUTIVE COMPENSATION

        Information with respect to this item is set forth in the Proxy
Statement under the heading "Executive Management" and is incorporated herein by
reference.


ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

        Information with respect to the ownership of securities of the Company
by certain persons is set forth in the Proxy Statement under the heading
"Principal Shareholders" and is incorporated herein by reference.

ITEM 13.    CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

        Information with respect to transactions with management and others is
set forth in the Proxy Statement under the headings "Executive Management -
Compensation Committee Interlocks and Insider Participation" and "Executive
Management - Other Relationships and Related Transactions" and is incorporated
herein by reference.


                                       13
<PAGE>   15

                                     PART IV


ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

         (a) The following documents are filed as a part of this report:

1.       Consolidated Financial Statements:

         The information  appearing in the Company's 1998 Annual Report to 
         Shareholders as described in Item 8 is incorporated herein by
         reference.

2.       Financial Statement Schedule:

         -   Report of Independent Accountants

         -   Schedule II - Valuation and Qualifying Accounts

         All other schedules are omitted because they are not applicable or the
         required information is shown in the financial statements or notes
         thereto.

         With the exception of the consolidated financial statements and the
         independent accountants' report thereon listed in the above index, the
         information referred to in Items 5, 6, and 7, and the supplementary
         quarterly financial information referred to in Item 8, all of which are
         included in the 1998 Annual Report to Shareholders of Roy F. Weston,
         Inc. and incorporated by reference into this Annual Report on Form
         10-K, the 1998 Annual Report to Shareholders is not to be deemed
         "filed" as part of this report.

3.        Exhibits:

          The following exhibits are filed herewith unless otherwise indicated:

    EXHIBIT NO.    DESCRIPTION

         3.1      Articles of Incorporation of the Company. Incorporated by
                  reference to Exhibit 3(a) to the Company's Registration
                  Statement on Form S-1 (Registration No. 33-20834) ("No.
                  33-20834").

          3.2     Amended By-Laws of the Company.

          4.1     Indenture between the Company and Mellon Bank, N.A. relating
                  to the 7% Convertible Subordinated Debentures due April 15,
                  2002. Incorporated by reference to Exhibit 4 to the Company's
                  Registration Statement on Form S-1 (Registration No. 33-13020)
                  ("No. 33-13020").


                                       14
<PAGE>   16

         EXHIBIT NO.        DESCRIPTION

         4.2      Trusteeship Transfer Agreement between PNC Bank, N. A., First
                  Trust of New York, N.A. and the Company dated March 1, 1996,
                  relating to the 7% Convertible Subordinated Debentures due
                  April 15, 2002. Incorporated by reference to Exhibit 4.3 to
                  the Company's Annual Report on Form 10-K for the year ended
                  December 31, 1995.

        10.1      Form of the Company's Retirement Supplement to Split Dollar
                  Life Insurance Agreement. Incorporated by reference to Exhibit
                  10 (c) to the Company's Registration Statement on Form S-1
                  (Registration No. 33-5914) ("No. 33-5914").

        10.2      Form of the Company's Executive Supplemental Benefit Plan -
                  Supplemental Retirement Agreement. Incorporated by reference
                  to Exhibit 10(d) to No. 33-5914.

        10.3      The Company's Stock-Based Incentive Compensation Plan.

        10.4      The Company's Retirement Income Restoration Plan, as amended.
                  Incorporated by reference to Exhibit 10.11 to the Company's
                  Annual Report on Form 10-K for the year ended December 31,
                  1997.

        10.5      Employment Agreement between William L. Robertson and the
                  Company dated as of July 14, 1997. Incorporated by reference
                  to Exhibit 10.10 to the Company's Quarterly Report on Form
                  10-Q for the quarter ended September 30, 1997.

        10.6      Amendment to Employment Agreement between William L. Robertson
                  and the Company dated May 19, 1998. Incorporated by reference
                  to Exhibit 10.4 to the Company's Quarterly Report on Form 10-Q
                  for the quarter ended June 30, 1998.

        10.7      Elective Deferred Compensation Agreement between William L.
                  Robertson and the Company dated December 23, 1997.
                  Incorporated by reference to Exhibit 10.20 to the Company's
                  Annual Report on Form 10-K for the year ended December 31,
                  1997.

        10.8      Continuing Services/Retirement Agreement between Roy F. Weston
                  and the Company dated July 19, 1997. Incorporated by reference
                  to Exhibit 10.11 to the Company's Quarterly Report on Form
                  10-Q for the quarter ended September 30, 1997.

        10.9      Consulting Services Agreement between Globequest International
                  Ltd. and the Company for the services of Tom Harvey, dated May
                  23, 1997. Incorporated by reference to Exhibit 10.7 to the
                  Company's Quarterly Report on Form 10-Q for the quarter ended
                  June 30, 1997.

        10.10     Consulting/Marketing Services Agreement between Armitage
                  Associates L.C. and the Company dated September 1, 1997.
                  Incorporated by reference to Exhibit 10.27 to the Company's
                  Annual Report on Form 10-K for the year ended December 31,
                  1997.

        10.11     Stock Pooling Agreement among the Company and certain holders
                  of the Company's Common Stock effective January 2, 1998.
                  Incorporated by reference to Exhibit 10.29 to the Company's
                  Annual Report on Form 10-K for the year ended December 31,
                  1997.

                                       15
<PAGE>   17

EXHIBIT NO.                         DESCRIPTION

        10.12     Credit Agreement between the Company and Bank of America
                  National Trust and Savings Association dated as of June 5,
                  1998. Incorporated by reference to Exhibit 10.5 to the
                  Company's Quarterly Report on Form 10-Q for the quarter ended
                  June 30, 1998.

        10.13     First Amendment to Credit Agreement between the Company and
                  Bank of America National Trust and Savings Association dated
                  August 14, 1998. Incorporated by reference to Exhibit 10.6 to
                  the Company's Quarterly Report on Form 10-Q for the quarter
                  ended September 30, 1998.

        10.14     Employment Agreement between the Company and Patrick G. McCann
                  dated as of March 11, 1998. Incorporated by reference to
                  Exhibit 10.1 to the Company's Quarterly Report on Form 10-Q
                  for the quarter ended March 31, 1998.

        10.15     Consulting Services Agreement between the Company and
                  Katherine W. Swoyer effective July 1, 1998. Incorporated by
                  reference to Exhibit 10.3 to the Company's Quarterly Report on
                  Form 10-Q for the quarter ended June 30, 1998.

        10.16     Travel Management Services Agreement between International
                  Corporate Travel Services, Inc. and the Company dated March
                  15, 1996. Incorporated by reference to Exhibit 10.24 to the
                  Company's Annual Report on Form 10-K for the year ended
                  December 31, 1997.

        10.17     Termination Agreement between International Corporate Travel
                  Services and the Company dated May 28, 1998. Incorporated by
                  reference to Exhibit 10.2 to the Company's Quarterly Report on
                  Form 10-Q for the quarter ended June 30, 1998.

        11        Computation of Basic and Diluted Earnings (Loss) per Share.

        13        The Company's 1998 Annual Report to Shareholders.

        21        Subsidiaries of the Company.

        23        Consent of Independent Accountants.

        27        Financial Data Schedule.

        (b) Reports on Form 8-K. No reports on Form 8-K were filed during the
fourth quarter of 1998.

Note: Any of the exhibits listed in the foregoing index not included with this
Annual Report on Form 10-K may be obtained without charge by writing to Arnold
P. Borish, Esq., Corporate Secretary, Roy F. Weston, Inc., 1400 Weston Way, P.O.
Box 2653, West Chester, Pennsylvania 19380.

                                       16
<PAGE>   18

                        REPORT OF INDEPENDENT ACCOUNTANTS

Board of Directors and Stockholders
Roy F. Weston, Inc.

         Our report on the consolidated financial statements of Roy F. Weston,
Inc. and Subsidiaries has been incorporated by reference in this Form 10-K from
page 15 of the 1998 Annual Report to Shareholders of Roy F. Weston, Inc. and
Subsidiaries. In connection with our audits of such financial statements, we
have also audited the related financial statement schedule listed in the index
on page 14 of this Form 10-K.

         In our opinion, the financial statement schedule referred to above,
when considered in relation to the basic financial statements taken as a whole,
presents fairly, in all material respects, the information required to be
included therein.



PRICEWATERHOUSECOOPERS, LLP

2400 Eleven Penn Center
Philadelphia, Pennsylvania
February 4, 1999

                                       17

<PAGE>   19


          
                      ROY F. WESTON, INC. AND SUBSIDIARIES
                 SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
                             (THOUSANDS OF DOLLARS)



<TABLE>
<CAPTION>
                                                  AMOUNTS        DEDUCTIONS -
                               BALANCE AT       CHARGED TO        CHARGED TO      WRITE-OFF OF         BALANCE
                                BEGINNING        COSTS AND           OTHER        UNCOLLECTIBLE       AT END OF
        DESCRIPTION             OF PERIOD        EXPENSES          ACCOUNTS         ACCOUNTS           PERIOD
<S>                            <C>              <C>              <C>              <C>                 <C>   
YEAR ENDED
     DECEMBER 31, 1998:
     Allowance for
     Doubtful Accounts           $1,750            $704              $ --             $572             $1,882

YEAR ENDED
     DECEMBER 31, 1997:
     Allowance for
     Doubtful Accounts           $1,510            $511              $ --             $271             $1,750

YEAR ENDED
     DECEMBER 31, 1996:
     Allowance for
     Doubtful Accounts           $1,800            $291              $ --             $581             $1,510
</TABLE>

                                       18
<PAGE>   20

                                   SIGNATURES

Pursuant to the requirements of Section 13 or 15 (d) of the Securities Exchange
Act of 1934, ROY F. WESTON, INC. has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized:

                               ROY F. WESTON, INC.

                            By: WILLIAM L. ROBERTSON
                              William L. Robertson
                              Chairman of the Board


                              Date: March 26, 1999

Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following persons on behalf of the Registrant and
in the capacities indicated on the dates indicated.

<TABLE>
<CAPTION>
              NAME                                          TITLE                                      DATE

<S>                                              <C>                                             <C> 
     WILLIAM L. ROBERTSON                        Chairman of the Board and                       March 26, 1999
____________________________________             Chief Executive Officer
     William L. Robertson                        (Principal Executive Officer)

     PATRICK G. MCCANN                           President and                                   March 26, 1999
____________________________________             Chief Operating Officer
     Patrick G. McCann                           (Principal Operating Officer)

     WILLIAM G. MECAUGHEY                        Vice President and                              March 26, 1999
____________________________________             Chief Financial Officer
     William G. Mecaughey                        (Principal Financial Officer)

     RICHARD L. ARMITAGE                         Director                                        March 26, 1999
____________________________________
     Richard L. Armitage

     JESSE BROWN                                 Director                                        March 26, 1999
____________________________________
     Jesse Brown

     THOMAS E. CARROLL                           Director                                        March 26, 1999
____________________________________
     Thomas E. Carroll

     THOMAS HARVEY                               Director                                        March 26, 1999
____________________________________
     Thomas Harvey

     WAYNE F. HOSKING, JR.                       Director                                        March 26, 1999
____________________________________
     Wayne F. Hosking, Jr.

     KATHERINE W.  SWOYER                        Vice Chair and                                  March 26, 1999
____________________________________             Director
     Katherine W. Swoyer
</TABLE>


<PAGE>   21

<TABLE>
<S>                                              <C>                                             <C> 

     THOMAS M.  SWOYER, JR.                      Director                                        March 26, 1999
____________________________________
     Thomas M. Swoyer, Jr.

     A. FREDERICK THOMPSON                       Director                                        March 26, 1999
____________________________________
     A. Frederick Thompson

     ROY F. WESTON                               Director                                        March 26, 1999
____________________________________
     Roy F. Weston

     JAMES H. WOLFE                              Director                                        March 26, 1999
____________________________________
     James H. Wolfe
</TABLE>


<PAGE>   1
                                                                     Exhibit 3.2

Current as of 05/18/98
Last amendment: 05/18/98

                               ROY F. WESTON, INC.
                                     BY-LAWS

                               ARTICLE I - OFFICES

                  1.       The registered office of the Company shall be at 1
                           Weston Way, West Chester, Chester County,
                           Pennsylvania.

                  2.       The Company may also have offices at such other
                           places as the Board of Directors may from time to
                           time appoint or the business of the Company may
                           require.

                                            ARTICLE II - SEAL

                  1.       The Corporate seal shall have inscribed thereon the
                           name of the Company, the year of its organization and
                           the words "Corporate Seal, Pennsylvania".

                                            ARTICLE III - SHAREHOLDERS MEETING

                  1.       Meetings of the shareholders shall be held at the
                           office of the Company at 1 Weston Way, West Chester,
                           Chester County, Pennsylvania or at such other place
                           or places, either within or without the Commonwealth
                           of Pennsylvania, as may from time to time be
                           selected.

2.                         The annual meeting of the shareholders shall be held
                           on the second Monday of the month of May in each
                           year, if not a legal holiday, and if a legal holiday,
                           then on the next secular day following, at 11:00
                           a.m., 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 properly be
                           brought before the meeting. If the annual meeting
                           shall not be called and held within six months after
                           the designated time, any shareholder may call such
                           meeting.

                                       1

<PAGE>   2








         3.       The presence, in person or by proxy, of shareholders entitled
                  to cast at least a majority of the votes which all
                  shareholders are entitled to cast on a particular matter(s)
                  being considered at a meeting shall constitute a quorum at all
                  meetings of the shareholders except as otherwise provided by
                  law, by Articles of Incorporation or these By-Laws. If,
                  however, such quorum shall not be present at any meeting of
                  the shareholders, those entitled to vote thereat shall have
                  power to adjourn the meeting from time to time, without notice
                  other than announcement at the meeting, until the requisite
                  number of shares shall be present. In the case of any meeting
                  called for the election of directors, adjournment or
                  adjournments may be taken only from day to day, or for such
                  longer periods not exceeding fifteen days each, as the holders
                  of a majority of the shares present in person or by proxy
                  shall direct, until such directors have been elected, and
                  those who attend the second of such adjourned meetings,
                  although less than a quorum, shall nevertheless constitute a
                  quorum for the purpose of electing directors.

         4.       At each meeting of the shareholders every shareholder having
                  the right to vote shall be entitled to vote in person or by
                  proxy appointed by an instrument in writing subscribed by such
                  shareholder and delivered to the Secretary at the meeting. No
                  unrevoked proxy shall be valid after eleven months from the
                  date of its execution, unless a longer time is expressly
                  provided therein, but in no event shall a proxy, unless
                  coupled with an interest, be voted on after three years from
                  the date of its execution. Shareholders shall not have the
                  right to vote cumulatively in the election of directors. Upon
                  demand made by a shareholder at any election for directors
                  before the voting begins, the election shall be by ballot. No
                  share shall be voted at any meeting upon which any installment
                  is due and unpaid. The original share ledger or transfer book,
                  or a duplicate thereof kept in this Commonwealth, shall be
                  prima facie evidence of the right of the person named therein
                  to vote thereon.

         5.       Written notice of the annual meeting shall be mailed to each
                  shareholder entitled to vote thereat, at such address as
                  appears on the books of the Company, at least ten days prior
                  to the meeting.

         6.       In advance of any meeting of shareholders, the Board of
                  Directors may appoint judges of election, who need not be
                  shareholders, to act at such meeting or any adjournment
                  thereof. If judges of election be not so appointed, the
                  chairman of any such meeting may, and on the request of any
                  shareholder or his proxy shall, make such appointment at the
                  meeting. The number of judges shall be one or three. If
                  appointed at a meeting on the request of one or more
                  shareholders or proxies, the majority of shares 



                                       2
<PAGE>   3

                  present and entitled to vote shall determine whether one or
                  three judges are to be appointed. On request of the chairman
                  of the meeting, or of any shareholder or his proxy, the judges
                  shall make a report in writing of any challenge or question or
                  matter determined by them, and execute a certificate of any
                  fact found by them. No person who is a candidate for office
                  shall act as a judge.

         7.       Special meetings of the shareholders may be called at any time
                  by the Chairman of the Board, or the Board of Directors, or
                  the holders of not less than one-fifth of all the shares
                  outstanding and entitled to vote. At any time, upon written
                  request of any person entitled to call a special meeting, it
                  shall be the duty of the Secretary to call a special meeting
                  of the shareholders, to be held at such time as the Secretary
                  may fix, not less than ten nor more than sixty days after
                  receipt of the request.

         8.       Business transacted at all special meetings shall be confined
                  to the objects stated in the call and matters germane thereto.

         9.       Written notice of a special meeting of shareholders stating
                  the time and place and object thereof, shall be mailed,
                  postage prepaid, to each shareholder entitled to vote thereat
                  at such address as appears on the books of the Company, at
                  least ten days before such meeting, unless a greater period of
                  notice is required by statute in a particular case.

         10.      The officer or agent having charge of the transfer books shall
                  make, at least five days before each meeting of shareholders,
                  a complete list of the shareholders entitled to vote at the
                  meeting, arranged in alphabetical order, with the address of
                  and the number of shares held by each, which list shall be
                  subject to inspection by any shareholder at any time during
                  usual business hours. Such list shall also be produced and
                  kept open at the time and place of the meeting, and shall be
                  subject to the inspection of any shareholder during the whole
                  time of the meeting. The original share ledger or transfer
                  book, or a duplicate thereof kept in this Commonwealth, shall
                  be prima facie evidence as to who are the shareholders
                  entitled to examine such list or share ledger or transfer
                  book, or to vote in person or by proxy, at any meeting or
                  shareholders.



                                       3
<PAGE>   4

                             ARTICLE IV - DIRECTORS

         1.       The business of this Company shall be managed by its Board of
                  Directors, the members of which need not be residents of the
                  Commonwealth of Pennsylvania or shareholders of the Company.
                  Subject to the preceding sentence and the provisions of
                  applicable law, the Board of Directors shall have the
                  authority to (i) determine the number of directors to
                  constitute the Board and (ii) if such number is increased
                  between annual meetings of the shareholders, fill the vacancy
                  or vacancies thereby created. Except as otherwise hereinbefore
                  provided with respect to interim vacancies, directors shall be
                  elected by plurality vote at the annual meeting of
                  shareholders, and each director shall be elected for a term
                  extending until the next following annual meeting of
                  shareholders and, except in the event of death, resignation or
                  removal, shall serve until such director's successor shall be
                  elected and shall qualify.

         2.       In addition to the powers and authorities by these By-Laws
                  expressly conferred upon them, the Board may exercise all such
                  powers of the Company and do all such lawful acts and things
                  as are not by statute or by the Articles or by these By-Laws
                  directed or required to be exercised or done by the
                  shareholders.

         3.       The meetings of the Board of Directors may be held at such
                  place within this Commonwealth, or elsewhere, as a majority of
                  the directors may from time to time appoint, or as may be
                  designated in the notice calling the meeting.

         4.       Each newly-elected Board may meet at such place and time as
                  shall be fixed by the shareholders at the meeting at which
                  such directors are elected, and no notice shall be necessary
                  to the newly elected directors in order to legally constitute
                  the meeting, or they may meet at such place an time as may be
                  fixed by the consent in writing of all the directors.

         5.       Regular meetings of the Board may be held without notice at
                  such time and place as shall be determined by the Board.

         6.       Special meetings of the Board may be called by the Chairman of
                  the Board on one day's notice to each director, either
                  personally or by mail or by telegram; special meetings shall
                  be called by the President or Secretary in like manner on like
                  notice on the written request of two directors.

         7.       A majority of the directors in office shall be necessary to
                  constitute a quorum for the transaction of business, and the
                  acts of a majority of the 



                                       4
<PAGE>   5

                           directors present at a meeting at which a quorum is
                           present shall be the acts of the Board of Directors.
                           If all the directors shall severally or collectively
                           consent in writing to any action to be taken by the
                           Company, such action shall be as valid corporate
                           action as though it had been authorized at a meeting
                           of the Board of Directors.

                  8.       The Board of Directors shall have the authority, by
                           resolution, to fix the compensation of Directors for
                           their services as Directors.

                  9.       The Board of Directors may elect an Executive
                           Committee consisting of such directors as may from
                           time to time be designated as members thereof by
                           resolution of the Board, which Committee shall have,
                           between meetings of the Board, all of the powers of
                           the Board except such as may not be lawfully
                           delegated to a committee.

                           In addition, the Board of Directors may form other
                           committees of service of the Board, consisting of
                           such directors as may from time to time be designated
                           as members thereof by resolution of the Board.
                           Each committee member shall be a member of the Board.

                  10.      One or more directors may participate in a meeting of
                           the Board or of a committee of the Board by means of
                           conference telephone or similar communications
                           equipment by means of which all persons participating
                           in the meeting can hear each other, and any director
                           so participating in a meeting shall be deemed to be
                           present at the meeting for all purposes.

                                            ARTICLE V - OFFICERS

                  1.       The Executive Officers of the Company shall be chosen
                           by the Board of Directors and shall consist of a
                           Chairman of the Board, a President, one or more Vice
                           Presidents, a Secretary and a Treasurer. The Board of
                           Directors may also choose one or more Vice Chairmen
                           and Vice Presidents and such other officers and
                           agents as it deems necessary, who shall hold their
                           offices for such terms and shall have such authority
                           and shall perform such duties as from time to time
                           shall be prescribed by the Board. Any two or more
                           offices may be held by the same person, except the
                           combination of the Offices of President and
                           Secretary. It shall not be necessary for the officers
                           to be directors.

                  2.       The salaries of all officers and agents of the
                           Company shall be fixed by the Board of Directors.

                                       5
<PAGE>   6

                  3.       The officers of the Company shall hold office for one
                           year and until their successors are chosen and have
                           qualified. Any officer elected or appointed by the
                           Board of Directors may be removed by the Board of
                           Directors whenever, in their judgement, the best
                           interests of the Company will be served thereby.

                  4.       The Chairman of the Board shall preside at all
                           meetings of the shareholders and directors. The Vice
                           Chairman (or, if more than one, in the order
                           designated by the Board) shall, in the absence of the
                           Chairman, preside at all meetings of the shareholders
                           and directors and shall have such other duties,
                           responsibilities and authority as are from time to
                           time, assigned to him by the Chairman.

                  5.       The President shall exercise such responsibilities as
                           may from time to time be assigned to him by the
                           Chairman of the Board or the Board of Directors, and
                           shall, in the absence of the Chairman of the Board
                           and Vice Chairman, assume the responsibilities and
                           discharge the duties of the Chairman.

                  6.       The Secretary shall attend all sessions of the Board
                           and all meetings of the shareholders and act as clerk
                           thereof, and record all votes of the Company and the
                           minutes of all its transactions in a book to be kept
                           for that purpose; and shall perform like duties for
                           all committees of the Board of Directors when
                           required. He shall give, or cause to be given, notice
                           of all meetings of the shareholders and of the Board
                           of Directors, and shall perform such other duties as
                           may be prescribed by the Board of Directors or
                           Chairman of the Board, under whose supervision he
                           shall be. He shall keep in safe custody the company
                           seal of the Company, and when authorized by the Board
                           affix the same to any instrument requiring it. The
                           Board may also choose one or more Assistant
                           Secretaries.

                  7.       The Treasurer shall direct the financial planning,
                           procurement, and investment of corporate funds. He
                           shall have responsibility for the protection and
                           custody of securities and financial instruments and
                           other assets of the Company and shall advise
                           management about insurance coverage, protection
                           against property losses, and potential liability. He
                           shall analyze financial records to forecast the
                           future financial position and financing requirements,
                           and evaluate the need for procurement of funds and
                           investment of surplus and shall advise management on
                           investments and loans for short and long range
                           financial plans. He shall sign or countersign notes
                           of indebtedness approved by management.

                  8.       The Board of Directors shall designate from among the
                           Executive Officers 



                                       6
<PAGE>   7

                           of the Company the Chief Executive Officer, the Chief
                           Operations Officer and the Chief Financial Officer.

                  9.       The Chief Executive Officer shall be the Chairman of
                           the Board or the President of the Company, shall be
                           appointed by the Board, and shall have general and
                           active management of the business of the Company and
                           shall see that all orders and resolutions of the
                           Board are carried into effect, subject however to the
                           right of the directors to delegate any specific
                           powers to any other officer or officers of the
                           Company. He shall be an ex-officio member of all
                           committees, and shall have the general powers and
                           duties of supervision and management usually vested
                           in the Chief Executive Officer of a Company.

                  10.      The Chief Operations Officer shall exercise such
                           responsibilities as may from time to time be assigned
                           to him by the Chief Executive Officer or the Board of
                           Directors.

                  11.      The Chief Financial Officer shall exercise such
                           responsibilities as may from time to time be assigned
                           to him by the Chief Executive Officer or the Board of
                           Directors, including the preparation of reports which
                           outline the Company's financial position in areas of
                           income, expenses, and earnings, based on past,
                           present and future operation. He shall direct the
                           preparation of operating budgets and financial
                           forecasts, determine depreciation rates to apply to
                           capitalized items, prepare governmental reports, and
                           arrange for audits of the Company's accounts. He
                           shall advise management on desirable operational
                           adjustments due to budgetary variations. He shall
                           render to the Chief Executive Officer and the Board
                           of Directors, at the regular meetings of the Board,
                           or whenever they may require it, an account of the
                           financial condition of the Company. He shall prepare
                           all reports to the shareholders and, as authorized by
                           the Board of Directors, shall direct the payment of
                           dividends on the stock of the Company.





                                            ARTICLE VI - VACANCIES


                  1.       If the office of any officer or agent, one or more,
                           becomes vacant for any reason, the Board of Directors
                           may choose a successor or successors, who shall hold
                           office for the unexpired term in respect of which
                           such vacancy 



                                       7
<PAGE>   8

                           occurred.

                  2.       Vacancies in the Board of Directors shall be filled
                           by a majority of the remaining members of the Board
                           though less than a quorum, and each person so elected
                           shall be a director until his successor is elected by
                           the shareholders, who may make such election at the
                           next annual meeting of the shareholders or at any
                           special meeting duly called for that purpose and held
                           prior thereto.

                                            ARTICLE VII - CORPORATE RECORDS

                  1.       There shall be kept at the registered office of the
                           Company an original or duplicate record of the
                           proceedings of the shareholders and of the directors,
                           and the original or a copy of its By-Laws, including
                           all amendments or alterations thereto to date,
                           certified by the Secretary of the Company. An
                           original or duplicate share register shall also be
                           kept at the registered office, or at the office of a
                           transfer agent or registrar within the Commonwealth,
                           giving the names of the shareholders in alphabetical
                           order, and showing their respective addresses, the
                           number and classes of shares held by each, the number
                           and date of certificates issued for the shares, and
                           the number and date of cancellation of every
                           certificate surrendered for cancellation.

                  2.       Every shareholder shall have a right to examine, in
                           person or by agent or attorney, at any reasonable
                           time or times, for any reasonable purpose, the share
                           register, books or records of account, and records of
                           the proceedings of the shareholders and directors,
                           and make extracts therefrom.

                                            ARTICLE VIII - CAPITAL STOCK

                  1.       The share certificates of the Company shall be
                           numbered and registered in the share ledger and
                           transfer books of the Company, as they are issued.
                           They shall be signed, by facsimile or otherwise, by
                           the Chairman of the Board or President and the
                           Secretary or Assistant Secretary and shall bear the
                           corporate seal. In case any officer who has executed,
                           or whose facsimile signature has been placed upon,
                           any share certificate shall have ceased to be such
                           officer, because of death, resignation or otherwise,
                           before the Certificate is issued, it may be issued by
                           the Company with the same effect as if the officer
                           had not ceased to be such at the time of its issue.


                  2.       Transfers of shares shall be made on the books of the
                           Company upon surrender of the certificates therefor,
                           endorsed by the person named in the



                                       8
<PAGE>   9
                           certificate or by attorney, lawfully constituted in
                           writing. No transfer shall be made inconsistent with
                           the provisions of Article 8 of the Uniform Commercial
                           Code, approved the sixth day of April, One Thousand
                           Nine Hundred Fifty-Three (Act No. 1), and its
                           amendments and supplements.

                  3.       The Board of Directors may fix a time, not more than
                           seventy days, prior to the date of any meeting of
                           shareholders, or the date fixed for the payment of
                           any dividend or distribution, or the date for the
                           allotment of rights, or the date when any change or
                           conversion or exchange of shares will be made or go
                           into effect, as a record date for the determination
                           of the shareholders entitled to notice of, and to
                           vote at, any such meeting, or entitled to receive
                           payment of any such dividend or distributions, or to
                           receive any such allotment of rights, or to exercise
                           the rights in respect to any such change, conversion,
                           or exchange of shares. In such case, only such
                           shareholders as shall be shareholders of record on
                           the date so fixed shall be entitled to notice of, and
                           to vote at, such meeting, or to receive payment of
                           such dividend, or to receive such allotment of
                           rights, or to exercise such rights as the case may
                           be, notwithstanding any transfer of any shares on the
                           books of the Company after any record date fixed as
                           aforesaid. The Board of Directors may close the books
                           of the Company against transfers of shares during the
                           whole or any part of such period, and in such case,
                           written or printed notice thereof shall be mailed at
                           least ten days before the closing thereof to each
                           shareholder of record at the address appearing on the
                           records of the Company or supplied by him to the
                           Company for the purpose of notice. While the stock
                           transfer books of the Company are closed, no transfer
                           of shares will be made thereon. If no record date if
                           fixed for the determination of shareholders entitled
                           to receive notice of, or vote at, a shareholders
                           meeting, transfers of shares which are transferred on
                           the books of the Company within ten days next
                           preceding the date of such meeting shall not be
                           entitled to notice of, or vote at, such meeting.

                  4.       Any person claiming a share certificate to be lost or
                           destroyed shall make an affidavit or affirmation of
                           that fact and advertise the same in such manner as
                           the Board of Directors may require, and shall give
                           the Company a bond of indemnity with sufficient
                           surety to protect the Company or any person injured
                           by the issue of a new certificate from any liability
                           or expense which it or they may incur by reason of
                           the original certificate remaining outstanding,
                           whereupon a new certificate may be issued by the same
                           tenor and for the same number of shares as the one
                           alleged to be lost or destroyed, but always subject
                           to the approval of the Board of Directors.

                  5.       Subject to the provisions of the statutes, the Board
                           of Directors may declare 



                                       9
<PAGE>   10

                           any pay dividends upon the outstanding shares of the
                           Company out of its surplus from time to time and to
                           such extent as they may deem advisable, in cash, in
                           property, or in shares of the Company.

                  6.       Before payment of any dividend there may be set aside
                           out of the net profits of the Company such sums as
                           the directors, from time to time, in their absolute
                           discretion, think proper as a reserve fund to meet
                           contingencies, or for equalizing dividends, or for
                           repairing or maintaining any property of the Company,
                           or for such other purpose as the directors shall
                           think conducive to the interest of the Company, and
                           the directors may abolish any such reserve in the
                           manner in which it was created.

                                   ARTICLE IX - MISCELLANEOUS PROVISIONS

                  1.       All checks or demands for money and notes of the
                           Company shall be signed by such officer or officers
                           as the Board of Directors may from time to time
                           designate.

                  2.       The fiscal year shall begin the 1st day of January
                           each year.

                  3.       Whenever written notice is required to be given to
                           any person, it may be given to such person, either
                           personally or by sending a copy thereof through the
                           mail, or by telegram, charges prepaid, to his address
                           appearing on the books of the Company, or supplied by
                           him to the Company for the purpose of notice. If the
                           notice is sent by mail or by telegraph, it shall be
                           deemed to have been given to the person entitled
                           thereto when deposited in the United States mail or
                           with a telegraph office for transmission to such
                           person. Such notice shall specify the place, day, and
                           hour of the meeting and, in the case of a special
                           meeting, the general nature of the business to be
                           transacted.

                  4.       Whenever any written notice is required by statute,
                           or by the Articles or By-Laws of this Company, a
                           waiver thereof in writing, signed by the person or
                           persons entitled to such notice, whether before or
                           after the time stated therein, shall be deemed
                           equivalent to the giving of such notice. Except in
                           the case of a special meeting, neither the business
                           to be transacted at, nor the purpose of the meeting
                           need be specified in the waiver of notice of such
                           meeting. Attendance of a person, either in person or
                           by proxy, at any meeting shall constitute a waiver of
                           notice of such meeting, except where a person attends
                           a meeting for the express purpose of objecting to the
                           transaction of any business because the meeting was
                           not lawfully called or convened.




                                       10
<PAGE>   11

                  5.       The Company shall indemnify its directors, officers,
                           employees, and agents to the full extent permitted by
                           Section 410 of the Business Corporation Law.

                  6.       All engineering decisions pertaining to any project
                           or engineering activities in the State of Washington,
                           or any other state where the laws require that the
                           Board of Directors designate a responsible engineer,
                           shall be made by designated engineer in responsible
                           charge named in the resolution of the Board of
                           Directors.

                                            ARTICLE X - ANNUAL STATEMENT

                  1.       The Chairman of the Board and Board of Directors
                           shall present at each annual meeting a full and
                           complete statement of the business and affairs of the
                           Company for the preceding year. Such statement shall
                           be prepared and presented in whatever manner the
                           Board of Directors shall deem advisable and need not
                           be verified by a certified public accountant.

                                            ARTICLE XI - AMENDMENTS

                  1.       These By-Laws may be altered, amended, or repealed by
                           the affirmative vote of a majority of the shares
                           issued and outstanding and entitled to vote thereat
                           at any regular or special meeting of the shareholders
                           or by the affirmative vote of a majority of all of
                           the directors then in office at any regular or
                           special meeting of the directors, if notice of the
                           proposed alteration, amendment, or repeal be
                           contained in the notice of the meeting.

                                   ARTICLE XII - LIMITATION ON LIABILITY

                  1.       A director shall not be personally liable for
                           monetary damages for any action taken on or after
                           January 27, 1987, or for the failure to take any
                           action on or after the date, unless (i) the director
                           has breached or failed to perform the duties of his
                           office under Section 8363 of the Pennsylvania
                           Directors' Liability Act (Act 145 of 1986, P.L.
                           1458), relating to standard of care and justifiable
                           reliance, and (ii) the breach or failure to perform
                           constitutes self-dealing, willful misconduct or
                           recklessness. The provisions of this Section 1 of
                           Article XII shall not apply to (i) the responsibility
                           or liability of a director pursuant to any criminal
                           statute, or (ii) the liability of a director for the
                           payment of taxes pursuant to local, state or federal
                           law. Any repeal or modification of any provision of
                           this Section 1 of Article XII shall be prospective
                           only and shall not affect, to the detriment of any
                           director, any limitation on the personal liability of
                           a director of the existing at the time of 



                                       11
<PAGE>   12

                           such repeal or modification.

                                            ARTICLE XIII - INDEMNIFICATION

                  1.       The Company shall indemnify to the extent not
                           prohibited by applicable law, any person who was or
                           is a party or is threatened to be made a party to any
                           threatened, pending or completed action, suit or
                           proceeding, whether civil, criminal, administrative
                           or investigative, by reason of the fact that he is or
                           was a director, officer, employee or agent of the
                           Company or is or was serving at the request of the
                           Company as a director, officer, employee or agent of
                           another corporation, partnership, joint venture,
                           trust or other enterprise, including an employee
                           benefit plan, against expenses (including attorneys'
                           fees), judgments, fines and amounts paid in
                           settlement actually and reasonable incurred by him in
                           connection with such action, suit or proceeding,
                           whether or not the indemnified liability arises or
                           arose from any threatened, pending or completed
                           action by or in the right of the Company. The Board
                           of Directors may, and on request of any such person
                           shall be required to, determine in each case whether
                           the applicable standards in the Pennsylvania
                           Directors' Liability Act or any other applicable
                           statute have been met, or such determination shall be
                           made by independent legal counsel if the Board so
                           directs or if the Board is not empowered by law to
                           make such determination. If there has been a change
                           in control of the Company between (1) the time of the
                           action or failure to act giving rise to the claim for
                           indemnification and (2) the time such claim is made
                           at the option of the person seeking indemnification
                           the permissibility of indemnification shall be
                           determined by special legal counsel selected jointly
                           by the Company and the person seeking
                           indemnification. The fees and expenses of such
                           counsel shall be paid by the Company. The obligations
                           of the Company to indemnify a director, officer,
                           employee or agent under this Article XIII, including
                           the duty to advance expenses, shall be a contract
                           between the Company and such person, and no
                           modification or repeal of any provision of this
                           Article XIII shall affect, to the detriment of the
                           Director, officer, employee or agent such obligations
                           of the Company in connection with a claim based on
                           any act or failure to act occurring before such
                           modification or repeal.

                  2.       Expenses incurred by an officer, director, employee
                           or agent of the Company in defending a civil or
                           criminal action, suit or proceeding shall be paid by
                           the Company in advance of the final disposition of
                           such action, suit or proceeding upon receipt of an
                           undertaking by or on behalf of the director, officer,
                           employee or agent to repay such amount if it shall
                           ultimately be determined that he is not entitled to
                           be indemnified by the Company.



                                       12
<PAGE>   13

                  3.       The indemnification and advancement of expenses
                           provided by this Article XIII shall not be deemed
                           exclusive of any other right to which one indemnified
                           may be entitled under any agreement, vote of
                           shareholders or otherwise, both as to action in his
                           official capacity and as to action in another
                           capacity while holding such office, and shall inure
                           to the benefit of the heirs, executors and
                           administrators of any such person.

                  4.       The Board of Directors shall have the power to (a)
                           authorize the Company to purchase and maintain, at
                           the Company's expense, insurance on behalf of the
                           Company and others to the extent that power to do so
                           has been or may be granted by statute, (b) create any
                           fund of any nature, whether or not under the control
                           of a trustee, or otherwise secure any of its
                           indemnification obligations and (c) give other
                           indemnification to the extent not prohibited by
                           statute.



                                       13

<PAGE>   1
                                                                    Exhibit 10.3

                                   APPENDIX A

                      [AMENDED AND RESTATED AS OF MARCH 15,
                    1991, TO BE EFFECTIVE AS OF MAY 13, 1991

                               ROY F. WESTON, INC.
                     STOCK-BASED INCENTIVE COMPENSATION PLAN

  DEFINITIONS

1.01     "AFFILIATE" means any entity other than a Subsidiary in which Parent
         has a substantial direct or indirect equity interest, as determined by
         the Board.

1.02     "AWARD" means an award of Deferred Stock, Restricted Stock, Options or
         SARs under the Plan.

1.03     "AWARD DATE" means the date on which an Award is made.

1.04     "BOARD" means the Board of Directors of Parent.

1.05     "Code" means the Internal Revenue Code of 1986, as amended. Reference
         to a specific section of the Code shall include any successor to such
         section.

1.06     "COMMITTEE" means the Committee designated by the Board to administer
         the Plan under Section 4.

1.07     "COMPANY" means Parent and its Subsidiaries, collectively, including
         any successor to any thereof.

1.08     "DEFERRED STOCK" means an Award made under Section 6 to receive Stock
         at the end of a specified Deferral Period.

1.09     "DEFERRAL PERIOD" Means the period during which the receipt of a
         Deferred Stock Award under Section 6 will be deferred.

1.10     "DISINTERESTED PERSON" MEANS A person defined in Rule l6b-3(c)(2)(i)
         promulgated by the SEC under the 1934 Act, or any successor definition
         adopted by the SEC.

1.11     "Employee" means an officer or key employee of the Company or an
         Affiliate including a director who is such an employee.

1.12     "FAIR MARKET VALUE" means, on any given date, the closing sale price of
         the Stock reported in the NASDAQ National Market System (or on the
         principal national securities exchange on which the Stock is listed if
         it is then so listed) on such date or, if the Stock was not traded on
         such date, on the next preceding day on which the Stock was traded.

1.13     "HOLDER" means an Employee to whom an Award is made.

1.14     "INCENTIVE STOCK OPTION" OR "ISO" means a stock option intended to meet
         the requirements of an incentive stock option as defined in Section 422
         of the Code and designated as such.

1.14     "1934 ACT" means the Securities Exchange Act of 1934, as amended.

1.16     "NON-QUALIFIED OPTION" OR "NQO" means a stock option not intended to be
         an Incentive Stock Option, and designated as a Non-Qualified Option.

1.17     "OPTION" means any stock option granted by the Committee under Section
         8.

1.18     "PARENT" means Roy F. Weston, Inc. and any successor thereto.

1.19     "PLAN" means the Stock-Based Incentive Compensation Plan herein set
         forth, as amended from time to time.

1.19     "RESTRICTED STOCK" means Stock awarded by the Committee under Section
         7.


<PAGE>   2





1.21     "RESTRICTION PERIOD" means the period during which Restricted Stock
         awarded under Section 7 is subject to forfeiture.

1.22     "RETIREMENT" means - retirement from the active employment of the
         Company or an Affiliate pursuant to the relevant provisions of the
         applicable retirement plan of the employing entity or as otherwise
         determined by the Board.

1.23     "SEC" means the U.S. Securities and Exchange Commission.

1.24     "STOCK" means the Series A Common Stock of Parent or such other class
         or kind of shares of capital stock or other securities as may result
         from the application of Section 10.

1.25     "STOCK APPRECIATION RIGHT" or "SAR" means a stock appreciation right
         awarded by the Committee under Section 9.

1.26     "SUBSIDIARY" means any corporation (other than Parent) in an unbroken
         chain of corporations beginning with Parent if each of the corporations
         other than the last corporation in the unbroken chain owns stock
         possessing 50% or more of the total combined voting power of all
         classes of stock in one of the other corporations in such chain.

1.27     "TEN PERCENT SHAREHOLDER" means a person who on any given date owns,
         either directly or within the meaning of the attribution rules
         contained in Section 424(d) of the Code, stock possessing more than ten
         percent of the total combined voting power of all classes of stock of
         Parent, a Subsidiary or Affiliate.

2.       AWARDS

         2.01     Awards that may be granted under the Plan are:

         (a) Deferred Stock Awards, giving the Holder the right to receive,
         without payment, a specified number of shares of Stock at the end of a
         specified Deferral Period or Periods.

         (b)      Restricted Stock Awards, giving the Holder the right to
                  receive, without payment, a specified number of shares of
                  Stock subject to forfeiture upon the occurrence of specified
                  events.

         (c)      Incentive Stock Options, giving the Holder the right for a
                  specified time period to purchase a specified number of shares
                  of Stock for a price per share not less than Fair Market Value
                  on the Award Date.

         (d)      Non-Qualified Options, giving the Holder the right for a
                  specified time period to purchase a specified number of shares
                  of Stock for a price per share that may be less than Fair
                  Market Value on the Award Date.

         (e)      Stock Appreciation Rights, giving the Holder the right to
                  receive, upon exercise of the SAR, the increase in the Fair
                  Market Value of a specified number of shares of Stock from the
                  Award Date to the date of exercise.

         2.02     Each Award shall be evidenced by an appropriate agreement with
                  the Holder which shall conform to the requirements of the Plan
                  and may contain such other provisions as the Committee shall
                  deem advisable.

  3.     ELIGIBILITY

          Any Employee is eligible to receive an Award, provided that an
          Incentive Stock Option shall not be granted to a Ten Percent
          Shareholder except on such terms concerning the option price and
          period of exercise as are provided in Paragraphs 8.01, 8.02 and 8.03.

 4.      ADMINISTRATION OF PLAN

         4.01     The Plan shall be administered and interpreted by the
                  Committee, which shall have full authority to act in selecting
                  Employees to whom Awards will be granted, in determining the
                  type and amount of Awards to be granted to each such Employee,
                  the terms and conditions of Awards and the terms of agreements
                  which will be entered into with Holders in connection with
                  Awards. The Committee shall 




<PAGE>   3

                  have at least two members, each of whom shall be a
                  Disinterested Person.

         4.02     The Committee's powers shall include, but not be limited to,
                  the power to (a) determine whether. to what extent and under
                  what circumstances (i) an option may be exchanged for cash.
                  Restricted Stock, Deferred Stock or some combination thereof;
                  (ii) an Award is made and operates on a tandem basis with
                  other Awards made hereunder; (iii) Stock or cash payable with
                  respect to an Award shall be deferred either automatically or
                  at the election of the Holder (including the power to add
                  deemed earnings to any such deferral); (b) condition an Award
                  upon the attainment of specified performance goals; and (c)
                  determine the effect, if any, of a change in control of Parent
                  upon outstanding Awards.

         4.03     The Committee shall have the power to adopt regulations for
                  carrying out the Plan and to make such changes in such
                  regulations as it shall from time to time deem advisable. The
                  Committee shall have the power unilaterally and without
                  approval of a Holder to amend an existing Award in order to
                  carry out the purposes of the Plan so long as such amendment
                  does not deprive the Holder of any benefit granted by the
                  Award and so long as the amended Award comports with the terms
                  of the Plan. Amendments adverse to the interests of the Holder
                  must be approved by the Holder. Any interpretation by the
                  Committee of the terms and provisions of the Plan and the
                  administration thereof, and all action taken by the Committee,
                  shall be final and binding on Plan participants.

5.       SHARES OF STOCK SUBJECT TO THE PLAN

         5.01     Subject to adjustment as provided in Section 10, the total
                  number of shares of Stock available for Awards under the Plan
                  shall be 625,000 shares.

         5.02     Any shares issued by Parent in a business combination
                  transaction through the assumption or substitution of
                  outstanding awards made by an acquired company shall not
                  reduce the shares available for Awards under the Plan. If any
                  shares subject to any Award granted hereunder are forfeited or
                  such Award otherwise terminates without the issuance of such
                  shares or the payment of other consideration in lieu of such
                  shares, the shares subject to such Award, to the extent of any
                  such forfeiture or termination, shall again be available for
                  Awards under the Plan.

6.       DEFERRED STOCK

         An Award of Deferred Stock shall be subject to the following terms and
         conditions:

         6.01     Upon determination of the number of shares of Deferred Stock
                  to be awarded to a Holder, the Committee shall direct that the
                  same be credited to the Holder's account on the books of
                  Parent but that issuance and delivery of the same shall be
                  deferred until the date or dates provided in Section 6.03
                  hereof. Prior to such issuance and delivery, the Holder shall
                  have no rights as a shareholder with respect to any shares of
                  Deferred Stock credited to the Holder's account.

        6.02      Amounts equal to any dividends declared and paid during the
                  Deferral Period with respect to the number of shares covered
                  by a Deferred Stock Award will be paid to the Holder
                  currently, or deferred and deemed to be reinvested in
                  additional Deferred Stock, or otherwise reinvested on such
                  terms, as determined at the time of the Award by the
                  Committee, in its sole discretion.

         6.03     The Deferred Stock agreement shall specify the duration of the
                  Deferral Period taking into account termination of employment
                  on account of death, disability, Retirement or other cause.
                  The Deferral Period may consist of one or more installments.
                  At the end of the Deferral Period or any installment thereof,
                  certificates representing the Shares of Deferred Stock
                  applicable to such Period or installment credited to the
                  account of a Holder shall be issued and delivered to the
                  Holder (or, where appropriate, the Holder's legal
                  representative) in accordance with the terms of the Deferred
                  Stock agreement. The Committee may, in its sole discretion,
                  accelerate the delivery of all or any part of a Deferred Stock
                  Award or waive the deferral limitations for all or any part of
                  a Deferred Stock Award.
<PAGE>   4

7.                RESTRICTED STOCK

         An Award of Restricted Stock shall be subject to the following terms
         and conditions:

         7.01     Upon determination of the number of shares of Restricted Stock
                  to be granted to a Holder. the Committee shall direct that a
                  certificate or certificates representing such number of shares
                  be issued to the Holder and registered in the Holder's name.
                  The certificate(s) representing such shares shall be legended
                  as to sale, transfer, assignment, pledge or other encumbrance
                  during the Restriction Period and deposited by the Holder,
                  together with a stock power with respect to the transfer
                  thereof endorsed in blank, with Parent, to be held in escrow
                  during the Restriction Period.

         7.02     During the Restriction Period the Holder shall have the right
                  to receive dividends from and to vote the shares of Restricted
                  Stock.

         7.03     The Restricted Stock agreement shall specify the duration of
                  the Restriction Period and the performance. employment or
                  other conditions (including termination of employment on
                  account of death, disability. Retirement or other cause) under
                  which the Restricted Stock may be forfeited to Parent. At the
                  end of the Restriction Period, the restrictions imposed
                  hereunder shall lapse with respect to the number of shares of
                  Restricted Stock as determined by the Committee, and the
                  legend shall be removed and the certificates for such number
                  of shares delivered to the Holder (or, where appropriate, the
                  Holder's legal representative). The Committee may, in its sole
                  discretion, modify or accelerate the vesting of shares of
                  Restricted Stock.

8.                OPTIONS

         An Award of Options shall be subject to the following terms and
         conditions:

        8.01      OPTION PRICE: The price per share at which Stock may be
                  purchased upon exercise of an Option shall be determined by
                  the Committee, but in the case of grants of ISOs, shall be not
                  less than the Fair Market Value on the Award Date. In the case
                  of any ISO granted to a Ten Percent Shareholder, the Option
                  price per share shall not be less than 110% of the Fair Market
                  Value on the Award Date. The Option price per share for NQOs
                  may be less than the Fair Market Value on the Award Date.

         8.02     TERM OF OPTIONS: The Option agreement shall specify when an
                  Option may be exercisable and the terms and conditions
                  applicable thereto and whether the Option is an ISO or an NQO.
                  The term of an Option shall in no event be longer than ten
                  years (five years in the case of an ISO granted to a Ten
                  Percent Shareholder) and no Option may be exercisable earlier
                  than six months from the Award Date.

        8.03      INCENTIVE STOCK OPTIONS: Each provision of the Plan and each
                  Option agreement relating to an ISO shall be construed so that
                  each ISO shall be an Incentive Stock Option as defined in
                  Section 422 of the Code, and any provisions of THE OPTION
                  AGREEMENT thereof that cannot be so construed shall be
                  disregarded. In no event may an ISO be granted after March 14,
                  2001. ISOs may not be granted to Employees of Affiliates.

         8.04     RESTRICTION ON TRANSFERABILITY: No Option shall be
                  transferable otherwise than by will or the laws of descent and
                  distribution and, during the lifetime of the Holder, shall be
                  exercisable only by the Holder. Upon the death of a Holder,
                  the person to whom the rights have passed by will or by the
                  laws of descent and distribution may exercise an Option only
                  in accordance with this Section 8.

         8.05     PAYMENT OF OPTION PRICE: The Option price of the shares of
                  Stock payable upon the exercise of an Option shall be paid in
                  full in cash at the time of the exercise or, with the consent
                  of the Committee, in whole or in part in shares of Stock
                  valued at Fair Market Value on the date of exercise. With the
                  consent of the Committee, payment upon the exercise of a NQO
                  may be made in whole or in part (as determined by the
                  Committee) by Restricted Stock based on Fair Market Value on
                  the date of exercise. In such case, the shares of Stock to
                  which the Option relates shall be subject to the same
                  forfeiture restrictions originally imposed on the shares of
                  Restricted Stock exchanged therefor.
<PAGE>   5

         8.06     TERMINATION BY DEATH: If a Holder's employment by the Company
                  or Affiliate terminates by reason of death, any Option held by
                  such Holder may thereafter be exercised, to the extent
                  exercisable at the time of death or on such accelerated basis
                  as the Committee may determine at or after grant, by the legal
                  representative of the Holder until the earlier to occur of the
                  expiration of (i) the period of six months from the date of
                  death or (ii) the stated term of such Option.

         8.07     TERMINATION BY REASON OF RETIREMENT OR DISABILITY: If a
                  Holder's employment by the Company or Affiliate terminates by
                  reason of disability (as determined by the Committee) or
                  Retirement, any Option held by such Holder may thereafter be
                  exercised by the Holder (or, where appropriate, the Holder's
                  legal representative), to the extent exercisable at the time
                  of termination or on such accelerated basis as the Committee
                  may determine at or after grant, until the earlier to occur of
                  the expiration of (i) the period of three months from the date
                  of termination or (ii) the stated term of such option.

         8.08     OTHER TERMINATION: If a Holder's employment by the Company or
                  Affiliate terminates for any reason other than death,
                  disability or Retirement, the Option shall terminate on the
                  date of such termination of employment.

9.       STOCK APPRECIATION RIGHTS

         An Award of SARs shall be subject to the following terms and
         conditions:

        9.01      An SAR may be granted in tandem with all or a portion of a
                  related Option ("Tandem SAR"), or may be granted separately
                  ("Freestanding SAR"). A Tandem SAR may be granted either at
                  the Award Date of the Option or at any time thereafter during
                  the term of the Option and shall be exercisable only to the
                  extent that the related Option is exercisable. In no event
                  shall any SAR be exercisable within the first six months of
                  its grant.

        9.02      The base price of a Tandem SAR shall be the option price under
                  the related Option. The base price per share of a Freestanding
                  SAR shall be not less than 100% of Fair Market Value, as
                  determined by the Committee, on the Award Date of the
                  Freestanding SAR.

        9.03      An SAR shall entitle the Holder to receive a payment equal to
                  the excess of the aggregate Fair Market Value of the shares of
                  Stock covered by the SAR on the date of exercise over the base
                  price of the SAR. Such payment may be in cash or in shares of
                  Stock, Deferred Stock, or Restricted Stock, or in any
                  combination thereof, as the Committee shall determine. Upon
                  exercise of a Tandem SAR as to some or all of the shares of
                  Stock covered, the related Option shall be canceled
                  automatically to the extent of the number of shares of Stock
                  covered by such exercise, and such shares shall no longer be
                  available for purchase under the Option pursuant to Section 8.
                  Conversely, if the related Option is exercised as to some or
                  all of the shares of Stock covered thereby, the related Tandem
                  SAR, if any, shall be canceled automatically to the extent of
                  the number of shares of Stock covered by the Option exercise.

          9.04    SARs shall be subject to the same terms and conditions
                  applicable to Options as stated in Paragraphs 8.02, 8.04,
                  8.06, 8.07, and 8.08. SARs shall also be subject to such other
                  terms and conditions not inconsistent with the Plan as shall
                  be determined by the Committee.

 10.     ADJUSTMENTS UPON CHANGES IN CAPITALIZATION

          In the event of a reorganization, recapitalization, stock split,
          spin-off, split-off, split-up, stock dividend. issuance of stock
          rights, combination of shares, merger, consolidation or any other
          change in the corporate structure of Parent affecting Stock, or any
          distribution to shareholders other than a cash dividend, the Board
          shall make appropriate adjustment in the number and kind of shares
          authorized by the Plan and such adjustments to outstanding Awards as
          it determines appropriate. No fractional shares of Stock shall be
          issued pursuant to such an adjustment, but an amount equivalent to the
          portion of Fair Market Value attributable to any such fractional
          shares shall, where appropriate, be paid in cash to the Holder.

 11.     TERMINATION AND AMENDMENT
<PAGE>   6

          The Plan shall remain in full force and effect until terminated by the
          Board. The Board shall have the power to amend, suspend or terminate
          the Plan at any time, provided that no such amendment shall be made
          without shareholder approval which shall:

         (a)      Increase (except as provided in Section 10) the total number
                  of shares available for issuance pursuant to the Plan;

         (b)      Change the class of Employees eligible to be Holders;

         (c)      Change the provisions of this Section 11; or

         (d)      Effect other change for which shareholder approval would be
                  required under Rule 16b-3 under the 1934 Act or any successor
                  provision promulgated by the SEC.

          Termination of the Plan pursuant to this Section II shall not affect
          Awards outstanding under the Plan at the time of termination.

12.      NON-ASSIGNABILITY

          Awards may not be pledged, assigned or transferred for any reason
          during the Holder's lifetime, and any attempt to do so shall be void
          and the relevant Award shall be forfeited.

13.      GENERAL PROVISIONS

        13.01    Nothing contained in the Plan, or an Award granted pursuant to
                 the Plan, shall confer upon an Employee any right with respect
                 to continuance of employment by the Company or Affiliate, nor
                 interfere in any way with the right of the Company or Affiliate
                 to terminate such employment at any time.

        13.02    For purposes of this Plan, transfer of employment between any
                 of Parent, Subsidiaries and Affiliates shall not be deemed
                 termination of employment.

        13.03    Holders shall be responsible to make appropriate provision for
                 all taxes required to be withheld in connection with any Award,
                 the exercise thereof and the transfer of shares of Stock
                 pursuant to this Plan. Such responsibility shall extend to all
                 applicable federal, state, local or foreign withholding taxes.
                 In the case of payment of Awards in the form of Stock, or
                 exercise of Options or SARs, Parent shall. at the election of
                 the Holder, have the right to retain the number of shares of
                 Stock whose aggregate Fair Market Value equals the amount to be
                 withheld in satisfaction of the applicable withholding taxes.
                 Agreements evidencing such Awards shall contain appropriate
                 provisions to effect withholding in this manner.

        13.04    Without amending the Plan, Awards may be granted to Employees
                 who are foreign nationals or employed outside the United States
                 or both, on such terms and conditions different from those
                 specified in the Plan as may, in the judgment of the Committee,
                 be necessary or desirable to further the purpose of the Plan.

        13.05    To the extent that federal laws (such as the 1934 Act, the
                 Code or the Employee Retirement Income Security Act of 1974)
                 do not otherwise control, the Plan and all determinations made
                 and actions taken pursuant hereto shall be governed by the law
                 of the Commonwealth of Pennsylvania and construed accordingly.


<PAGE>   1
                                                                      Exhibit 11

                      ROY F. WESTON, INC. AND SUBSIDIARIES
              SCHEDULE OF COMPUTATION OF BASIC AND DILUTED EARNINGS
                                (LOSS) PER SHARE


<TABLE>
<CAPTION>
                                                               Years Ended December 31
                                                        1998             1997                1996
                                                    -----------       -----------        ----------- 
                                                                   Thousands of Dollars,
                                                            Except Share and Per Share Amounts
<S>                                                 <C>               <C>                <C>         
Basic

Net income (loss) ...........................       $       858       $   (11,425)       $   (16,655)

Weighted average shares .....................         9,914,379         9,712,752          9,562,945

Basic earnings (loss) per share .............       $       .09       $     (1.18)       $     (1.74)


Diluted

Net income (loss) ...........................       $       858       $   (11,425)       $   (16,655)

Weighted average shares with dilutive options         9,936,379         9,712,752          9,562,945

Diluted earnings (loss) per share ...........       $       .09       $     (1.18)       $     (1.74)
</TABLE>


<PAGE>   1

                                                                      Exhibit 13

                      ROY F. WESTON, INC. AND SUBSIDIARIES

                    MANAGEMENT DISCUSSION AND ANALYSIS [LOGO]

The following table sets forth for the years indicated the percentage of net
revenues represented by certain elements of the Company's consolidated
statements of operations. The table and subsequent discussion should be read in
conjunction with the Consolidated Financial Statements and Notes thereto.

<TABLE>
<CAPTION>
                                              For the years ended December 31
                                              ----------------------------------
                                                 1998      1997       1996
- --------------------------------------------------------------------------------
<S>                                             <C>       <C>        <C>   
Net revenues                                    100.0%    100.0%     100.0%
- --------------------------------------------------------------------------------
Expenses
   Direct salaries and other operating costs     86.5%     94.5%      87.9%
   General and administrative expenses           12.7%     17.8%      15.2%
   Pension curtailment gain                        --      (2.7)%       --
   Restructuring charges (credits)                 --      (1.2)%      8.2%
   Impairment of long-lived assets                 --       0.9%       1.8%
- --------------------------------------------------------------------------------
Income (loss) from operations                     0.8%     (9.3)%    (13.1)%
Other income (expense)                            0.2%      0.3%       0.2%
- --------------------------------------------------------------------------------
Income (loss) before income taxes                 1.0%     (9.0)%    (12.9)%
Income taxes                                      0.4%     (1.0)%     (3.5)%
- --------------------------------------------------------------------------------
Net income (loss)                                 0.6%     (8.0)%     (9.4)%
</TABLE>

The Company incurs a substantial amount of direct project costs, which are
passed through to the Company's clients, resulting principally from the use of
subcontractors on projects. Consequently, the Company measures its operating
performance on the basis of net revenues, which are determined by deducting such
direct project costs from gross revenues. Direct project costs were 42%, 40% and
33% of gross revenues in 1998, 1997 and 1996, respectively. The increases in
1998 and 1997 are primarily due to greater subcontracting of laboratory analysis
beginning in May 1997 as a result of divestiture of the Company's analytical
laboratories.

RESULTS OF OPERATIONS

1998 Compared to 1997

Net revenues decreased 1% to $140,386,000 from $142,359,000 in 1997. The Company
had no net revenues from its analytical laboratory operations in 1998 as it
completed the sale of these operations in May 1997. Analytical laboratory
operations provided $5,624,000 of net revenues in 1997. Dedicated site federal
program net revenues decreased $2,215,000 due to lower margins on one project
and a 3% decrease in total direct labor. One of the Company's dedicated site
federal programs, which provided $6,619,000 of the Company's 1998 net revenues,
is being rebid in 1999. Net revenues for the Company's other operations
increased $6,137,000 due to both higher utilization of direct labor and
increased multipliers. The increased direct labor was primarily due to
additional projects obtained through enhanced selling efforts.

                                                                               9
<PAGE>   2

                      ROY F. WESTON, INC. AND SUBSIDIARIES

                       MANAGEMENT DISCUSSION AND ANALYSIS

The Company had income from operations of $1,145,000 in 1998 compared to a loss
from operations of $13,216,000 in 1997. The 1998 results included a $1,000,000
reduction in the Company's estimated insurance claim liability and $800,000 of
net revenues for work performed on a contract in prior years, resulting from a
settlement of that contract. The 1997 loss was reduced by a gain of $3,899,000
from curtailment of the Company's defined benefit pension plan and by
restructuring credits of $1,668,000 resulting from the sales of the net assets
of two subsidiaries. Included in the 1997 loss were charges of $1,245,000 for
the writedown of financial and project software costs, approximately $3,400,000
related to reductions in the Company's workforce, changes in senior management,
and election of new directors in May, 1997, and approximately $1,000,000 for
excess office lease space.

Margins were significantly improved in 1998 as the Company realized the benefit
of staff and cost reductions initiated in the second half of 1997. Operations
personnel utilization was up nearly two full percentage points in 1998.

General and administrative expenses declined $7,545,000, or 30%, in 1998,
decreasing to 12.7% of net revenues from 17.8% in 1997. Expenditures in 1997
included approximately $2,500,000 for reductions in the Company's administrative
workforce and changes to its Board of Directors and senior management. The
workforce reductions resulted in substantially lower administrative salaries and
expenses in 1998. In addition, expenses for the Company's computer systems were
much lower in 1998 due to the 1997 writedown of financial and project software
costs. The Company is developing replacement systems which are currently
expected to be placed in service in early 1999.

The Company had an effective income tax rate of 40% in 1998 compared to an
effective income tax benefit rate of 11% in 1997. The 1997 rate included an
income tax charge of $3,000,000 to provide for the uncertain realizability of a
portion of the Company's deferred tax assets. The charge increased the Company's
1997 basic net loss per share by $.31, or 26% of its 1997 basic net loss per
share.

The Company had other income of $285,000 in 1998 compared to $341,000 in 1997.
Interest and dividend income decreased $356,000 in 1998 primarily due to
significantly lower average amounts invested. This decrease was partially offset
by a 1998 increase of $174,000 in gains on sales of investments. In addition,
the Company realized gains of $157,000 and $21,000 on redemptions of $3,971,000
and $186,000 of its 7% Convertible Subordinated Debentures in 1998 and 1997,
respectively. Interest expense decreased $252,000 from 1997 due primarily to the
repurchase of 7% Convertible Subordinated Debentures and the repayment of a
five-year term loan.

1997 Compared To 1996

Net revenues decreased 19% to $142,359,000 from $176,530,000 in 1996. Consulting
net revenues were impacted by reduced levels of available business.
Non-dedicated-site federal government projects and industrial projects accounted
for 52% and 33%, respectively, of the decline in net revenues. Net revenues from
analytical services declined $13,100,000 as the Company completed the sale of
its analytical laboratory assets in May 1997. Construction and remediation
project net revenues were lower in 1997 due primarily to the lack of an active
thermal incineration project.

The Company had losses from operations of $13,216,000 in 1997 and $23,181,000 in
1996. The 1997 loss was reduced by a gain of $3,899,000 from curtailment of the
Company's defined benefit pension plan and by restructuring credits of
$1,668,000 resulting from the sales of the net assets of two subsidiaries.
Included in the 1997 loss were charges of $1,245,000 for the writedown of
financial and project software costs, 

10
<PAGE>   3

                      ROY F. WESTON, INC. AND SUBSIDIARIES

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

approximately $3,400,000 related to reductions in the Company's workforce,
changes in senior management, and election of new directors in May 1997, and
approximately $1,000,000 for excess office lease space. The 1996 loss included
restructuring charges of $14,421,000 consisting principally of asset writedowns
and other expenses associated with a plan to withdraw from the analytical
laboratory business, costs to close or reduce the size of certain office
facilities and severance costs associated with workforce reductions. Also, 1996
included a charge of $3,146,000 to recognize the impairment in value of
transportable thermal treatment systems and a minority interest in a
bioremediation company.

Margins were lower in 1997 as staff and cost reductions could not fully offset
revenue declines in both consulting and construction and remediation activities.
Operations personnel utilization was slightly higher for the full year 1997 than
in 1996, reflecting improvement in the second half of the year. Margins were
lower in 1997 than in 1996, reflecting the continuing impacts of significant
competition, heightened by industry consolidation and the impact of cost
overruns on certain construction and remediation projects.

General and administrative expenses declined $1,596,000, or 6%, in 1997,
although increasing to 17.8% of net revenues from 15.2% in 1996. Expenditures in
1997 included approximately $2,500,000 for reductions to the Company's
administrative workforce and changes to its Board of Directors and senior
management. Expenditures in 1996 included $944,000 relating to severance
benefits for two of the Company's former senior officers.

The Company had an effective income tax benefit rate of 11% in 1997 compared to
an effective income tax benefit rate of 27% in 1996. This rate change was due to
a 1997 income tax charge of $3,000,000 to provide for the uncertain
realizability of a portion of the Company's deferred tax assets. The charge
increased the Company's basic net loss per share by $.31, or 26% of its 1997
basic net loss per share.

The Company had other income of $341,000 in 1997 compared to $381,000 in 1996.
The Company realized gains of $21,000 and $273,000 on redemptions of $186,000
and $3,715,000 of its 7% Convertible Subordinated Debentures in 1997 and 1996,
respectively. Interest expense decreased $328,000 from 1996 due primarily to the
repurchase of 7% Convertible Subordinated Debentures and scheduled repayments of
a five-year term loan.

LIQUIDITY AND CAPITAL RESOURCES

Cash and cash equivalents decreased $6,774,000 in 1998 to $3,993,000 from
$10,767,000 at December 31, 1997. Marketable securities decreased $2,621,000 in
1998 to $1,547,000 from $4,168,000 at December 31, 1997. 

Operating activities used cash of $4,167,000 in 1998 and provided cash of
$2,275,000 in 1997. The total of accounts receivable and work in process, net of
advance billings, increased $9,639,000 in 1998, due primarily to increased gross
revenues in the fourth quarter of 1998 and significant billing delays arising
from contract modification issues on one large federal construction project. The
Company expects the contract issues to be resolved in 1999, resulting in
collection of the related unbilled receivables. However, in the event of an
unfavorable resolution, the Company would sustain a significant loss and an
impairment to its cash flow. In addition, the Company had net repayments of
$2,898,000 and $2,411,000 of its short-term and long-term debt in 1998 and 1997,
respectively.

Net cash investments in property and equipment and other assets were $3,180,000
in 1998 and $2,780,000 in 1997. Investments in 1998 and 1997 consisted primarily
of computers and other 


                                                                              11
<PAGE>   4

                      ROY F. WESTON, INC. AND SUBSIDIARIES

                       MANAGEMENT DISCUSSION AND ANALYSIS

equipment. The Company plans to invest approximately $3,000,000 to $4,500,000 in
capital expenditures in 1999. The Company's capital expenditures are generally
financed through operating cash flow, but some borrowing may be required in
1999.

The Company is required to make annual redemptions of 10% of its 7% Convertible
Subordinated Debentures in the principal amount of $3,140,000 by April 15 of
each year. Repurchases of $1,398,000 need to be made to satisfy the 1999
requirement.

The Company has an $18,000,000 revolving credit facility with a bank to provide
cash borrowings and letters of credit. The facility is collateralized by liens
on substantially all of the Company's tangible and intangible assets, excluding
real estate. The facility expires on June 5, 2000 with a one-year renewal option
and is available for working capital and general corporate purposes, including
permitted acquisitions. Cash borrowings bear interest at 1% over the prime
interest rate or, at the Company's option, other variable rates. Cash borrowings
for purposes other than acquisitions are limited to 125% of cash and marketable
securities pledged by the Company. The agreement requires the Company to
maintain minimum levels of cash and marketable securities, tangible net worth
and certain financial ratios and restricts dividend payments, certain
expenditures and debt outside the agreement. At December 31, 1998, the Company
had $1,900,000 of outstanding cash borrowings under the facility and had
outstanding letters of credit aggregating $2,592,000.

The Company received $235,000 in 1998 and $583,000 in 1997 from shares of Series
A common stock issued through its Employee Stock Purchase Plan. Substantially
all of the shares reserved for issuance under this plan have been distributed as
of July 1, 1998 and the plan has terminated in accordance with its terms.

YEAR 2000 ISSUES

Year 2000 Readiness Disclosure

Many computer systems and other equipment with embedded chips or processors use
only two digits to represent the year and may be unable to accurately process
data and transactions on and after January 1, 2000 (Y2K Issues). As a result,
there are risks of miscalculations or system failures, which could cause
disruptions of business operations.

The Company is in the process of implementing a readiness program with the
objective of having all significant exposures under its direct control
functioning properly with respect to Y2K Issues before January 1, 2000. The
Company expects that its readiness program will achieve this objective and that
the costs of Y2K readiness will not have a material effect on the Company's
results of operations or financial condition.

The Y2K readiness program is organized into functional areas including business
systems; computer hardware infrastructure; office facilities and equipment;
legal and insurance matters; and communications with clients and vendors. The
Company has formed a Y2K Readiness team, which is addressing the following:

      o     Inventorying Y2K Issues;

      o     Assigning priorities to identified Y2K Issues;

      o     Assessing Y2K compliance of material items;

      o     Repair or replacement of any items found to be non-compliant;

      o     Testing of repaired or replaced items;

      o     Design and implementation of contingency and business continuation
            plans.

The Company has substantially completed its inventory of Y2K Issues and has
assigned priorities 


12
<PAGE>   5

                      ROY F. WESTON, INC. AND SUBSIDIARIES

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

to the identified Issues. The assessment of compliance is more than 80% complete
and the process of repair and replacement of non-compliant systems is underway
and is expected to be completed by August 1999. In addition, the Company is in
the process of identifying and contacting service providers, suppliers and
clients whose activities are believed to be critical to business operations to
determine their compliance with Y2K Issues.

The Company has begun the process of developing contingency plans intended to
mitigate possible disruptions in business that may result from Y2K Issues. These
plans will address special payment considerations from clients, alternate
suppliers and alternate methods of processing business transactions. The
contingency plans are expected to be completed by November 30, 1999.

As part of the Company's ongoing plan to reduce overhead costs, the Company is
in the process of installing new business systems, which are designed to more
efficiently manage the Company's operations. The new systems are expected to be
fully operational during 1999, and the vendor of these systems has warranted
that they are Y2K compliant. The cost of implementation of the new business
systems is expected to be $4,250,000 to $5,250,000 of which approximately
$2,200,000 was expended as of December 31, 1998.

In addition to the cost of implementation of the new business systems, the
Company currently estimates that the cost of identifying, evaluating and
correcting Y2K Issues will be $500,000 to $1,000,000. Expenditures as of
December 31, 1998 were approximately $100,000. The costs of replacing systems,
including hardware and software packages, will be capitalized and amortized over
their useful lives, while all other costs will be expensed as incurred.

The Company's Y2K readiness program is an ongoing process and the estimates of
costs and completion dates, as well as the Company's expectations, described
above are subject to uncertainties. For example, the total costs which the
Company will incur in connection with Y2K Issues will be influenced by the
Company's ability to successfully complete its Y2K readiness program, including
identification of issues, the nature and amount of programming required to fix
affected programs, the related labor and/or consulting costs for such
remediation and the ability of third parties with whom the Company has business
relationships to successfully address their own Y2K Issues. The failure of the
Company to successfully identify and fix all Y2K Issues in critical operations,
or the failure of critical customers or critical systems vendors to continue
operations due to their Y2K Issues, could have a material adverse effect on the
Company's results of operations and financial condition.

OTHER

The Company had net contract backlog of $61,000,000 and $65,300,000 on December
31, 1998 and 1997, respectively. In addition to backlog, the Company can
generate additional revenues from open order contracts and activities related to
emergency responses, which are excluded from contract backlog until approved and
funded. Contracts are subject to cancellation by the client, changes in the
scope of work, and delays in project startup. The maintenance of adequate
contract backlog is dependent on continued generation of new contract bookings.
In 1998, new contract bookings were $145,000,000, a 2% increase from 1997. New
contract bookings had declined in each of the previous four years.

Management believes that inflationary increases in its operating costs and
expenses can generally be 


                                                                              13
<PAGE>   6

                      ROY F. WESTON, INC. AND SUBSIDIARIES

                       MANAGEMENT DISCUSSION AND ANALYSIS

absorbed by increased rates the Company can bill for its services. To date,
inflationary effects have had little impact on the Company.

FORWARD LOOKING STATEMENTS

From time to time, the Company, its management or other company representatives
may make or publish statements that contain projections, beliefs, expectations,
predictions or intentions relating to anticipated financial performance,
business prospects, potential contract value, business strategy and plans,
technological developments and other matters. The Private Securities Litigation
Reform Act of 1995 provides a safe harbor for these forward looking statements.
In order to comply with the terms of the safe harbor, the Company notes that a
number of risk factors and uncertainties could cause the Company's actual
results, experience or outcome to differ materially from projections, beliefs,
expectations, predictions or intentions expressed in forward looking statements.
These risks and uncertainties, which may affect the operations, performance,
development and results of the Company's business, include, but are not limited
to, the following (as well as those identified elsewhere in this report):

      o     The highly competitive marketplace in which the Company operates.

      o     Changes in and levels of enforcement of federal, state, and local
            environmental legislation and regulations.

      o     The Company's ability to obtain new contracts from existing as well
            as new clients, and the uncertain timing of awards and contracts.

      o     The Company's ability to execute new projects and those in backlog
            within reasonable cost estimates, as well as other contract
            performance risks.

      o     Funding appropriation, funding delay, and the issuance of work
            orders on government projects.

      o     The Company's ability to achieve any planned overhead or other cost
            reductions while maintaining adequate work flow.

      o     The Company's ability to successfully implement its readiness
            program for Y2K Issues.

      o     The Company's ability to obtain adequate financing for its current
            operations and future expansion, including adequate financing for
            the Company's acquisition strategy.

      o     The Company's ability to execute its strategic plan through
            successful marketing activities and continued cost containment.

      o     The nature of the Company's work with hazardous materials, toxic
            wastes and other pollutants, and the potential for uninsured claims
            or claims in excess of insurance limits, including professional
            liability and pollution claims.

      o     The Company's ability to conclude and implement acquisitions of
            other businesses consistent with the Company's acquisition strategy.

      o     The Company's ability to retain key personnel.

The Company disclaims any intent or obligation to update forward looking
statements.


14
<PAGE>   7

                      ROY F. WESTON, INC. AND SUBSIDIARIES

                                                  SELECTED FINANCIAL DATA [LOGO]

<TABLE>
<CAPTION>
                                                                          For the years ended December 31
                                             ------------------------------------------------------------
(Thousands of dollars,                          1998        1997         1996          1995        1994
except per share amounts)
- ---------------------------------------------------------------------------------------------------------
<S>                                          <C>         <C>          <C>           <C>         <C>      
Gross revenues                               $ 241,192   $ 238,103    $ 263,388     $ 309,858   $ 290,081
Net revenues                                 $ 140,386   $ 142,359    $ 176,530     $ 206,273   $ 200,304
Income (loss) from operations                $   1,145   $ (13,216)   $ (23,181)*   $   2,623   $    (730)
Net income (loss)                            $     858   $ (11,425)   $ (16,655)    $   1,514   $  (1,103)
Basic earnings (loss) per share              $     .09   $   (1.18)   $   (1.74)    $     .16   $    (.12)
</TABLE>

* Includes restructuring and impairment charges aggregating $17,567. 

<TABLE>
<CAPTION>
At December 31
- ---------------------------------------------------------------------------------------------------------
<S>                                          <C>         <C>          <C>           <C>         <C>      
Working capital                              $  44,854   $  46,239    $  58,956     $  67,875   $  74,352
Total assets                                 $ 121,356   $ 125,248    $ 141,472     $ 163,406   $ 156,730
Short-term debt                              $   3,600   $   2,914    $   2,159     $   2,261   $   2,431
Long-term debt (less current portion)        $  12,997   $  15,884    $  18,922     $  24,673   $  29,843
Stockholders' equity                         $  56,324   $  55,367    $  66,090     $  82,901   $  80,892
- ---------------------------------------------------------------------------------------------------------
</TABLE>

REPORT OF INDEPENDENT ACCOUNTANTS

Board of Directors and Stockholders

Roy F. Weston, Inc.

We have audited the accompanying consolidated balance sheets of Roy F. Weston,
Inc. and Subsidiaries as of December 31, 1998 and 1997, and the related
consolidated statements of operations, cash flows and stockholders' equity for
each of the three years in the period ended December 31, 1998. 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 in accordance with generally accepted auditing
standards. Those standards 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. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the consolidated financial position of Roy F. Weston,
Inc. and Subsidiaries as of December 31, 1998 and 1997, and the consolidated
results of their operations and their cash flows for each of the three years in
the period ended December 31, 1998 in conformity with generally accepted
accounting principles.


/s/ PricewaterhouseCoopers LLP


2400 Eleven Penn Center
Philadelphia, Pennsylvania
February 4, 1999


                                                                              15
<PAGE>   8

                      ROY F. WESTON, INC. AND SUBSIDIARIES

[LOGO] FINANCIAL STATEMENTS
       CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                         December 31
                                                                     -------------------
(Thousands of dollars)                                                   1998       1997
<S>                                                                  <C>        <C>     
ASSETS
- ----------------------------------------------------------------------------------------
Current Assets

Cash and cash equivalents                                            $  3,993   $ 10,767
Marketable securities                                                   1,547      4,168
Accounts receivable, trade, net of allowance for doubtful accounts     60,476     54,497
Unbilled costs and estimated earnings on contracts in process          20,540     20,920
Prepaid and refundable income taxes                                        --      1,000
Deferred income taxes                                                   2,470      3,104
Other                                                                   4,376      2,643

- ----------------------------------------------------------------------------------------
   Total current assets                                                93,402     97,099
- ----------------------------------------------------------------------------------------

Property and Equipment

Land                                                                      215        215
Buildings and improvements                                             11,500     11,625
Furniture and equipment                                                30,544     38,803
Leasehold improvements                                                  1,787      2,849
Construction in progress                                                   --          8

- ----------------------------------------------------------------------------------------
   Total property and equipment                                        44,046     53,500
   Less accumulated depreciation and amortization                      34,852     43,248
- ----------------------------------------------------------------------------------------
   Property and equipment, net                                          9,194     10,252
- ----------------------------------------------------------------------------------------

Other Assets

Goodwill, net of accumulated amortization of $4,138 in 1998
   and $4,076 in 1997                                                   1,816      1,878
Deferred income taxes                                                   5,528      5,125
Other                                                                  11,416     10,894
- ----------------------------------------------------------------------------------------
   Total other assets                                                  18,760     17,897
- ----------------------------------------------------------------------------------------
TOTAL ASSETS                                                         $121,356   $125,248
                                                                     ===================
</TABLE>

See notes to consolidated financial statements.


16
<PAGE>   9

                      ROY F. WESTON, INC. AND SUBSIDIARIES

<TABLE>
<CAPTION>
                                                                           December 31
                                                                       -------------------
(Thousands of dollars)                                                     1998       1997
<S>                                                                    <C>        <C>     
LIABILITIES AND STOCKHOLDERS' EQUITY
- ------------------------------------------------------------------------------------------
Current Liabilities

Borrowings under line of credit                                        $  1,900   $     --
Current maturities of long-term debt                                      1,700      2,914
Accounts payable and accrued expenses                                    17,579     13,879
Billings on contracts in process in excess of costs and
   estimated earnings                                                    10,939     14,275
Employee compensation, benefits and payroll taxes                         8,445      8,721
Income taxes payable                                                        202         59
Other                                                                     7,783     11,012
- ------------------------------------------------------------------------------------------
   Total current liabilities                                             48,548     50,860
- ------------------------------------------------------------------------------------------
Long-Term Debt                                                           12,997     15,884
- ------------------------------------------------------------------------------------------
Other Liabilities                                                         3,487      3,137
- ------------------------------------------------------------------------------------------
Contingencies
- ------------------------------------------------------------------------------------------
Stockholders' Equity

Common stock, $.10 par value, 10,500,000 shares authorized;
   3,170,294 shares issued in 1998; 3,170,494 shares issued in 1997         317        317

Series A common stock, $.10 par value, 20,500,000 shares authorized;
   8,650,778 shares issued in 1998; 8,581,821 shares issued in 1997         865        858
Unrealized gain on investments                                              597        733
Additional paid-in capital                                               55,928     55,700
Retained earnings                                                         3,707      2,849
- ------------------------------------------------------------------------------------------
                                                                         61,414     60,457

Less treasury stock at cost, 1,081,275 Common shares in 1998
   and 1997; 792,805 Series A common shares in 1998 and 1997              5,090      5,090
- ------------------------------------------------------------------------------------------
   Total stockholders' equity                                            56,324     55,367
- ------------------------------------------------------------------------------------------

TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                             $121,356   $125,248
                                                                       ===================
</TABLE>


                                                                              17
<PAGE>   10

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FINANCIAL STATEMENTS
CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                         For the years ended December 31
                                                   -----------------------------------------
(Thousands of dollars, except per share amounts)          1998           1997           1996
- --------------------------------------------------------------------------------------------
<S>                                                <C>            <C>            <C>        
Gross revenues                                     $   241,192    $   238,103    $   263,388
Direct project costs                                   100,806         95,744         86,858
- --------------------------------------------------------------------------------------------
Net revenues                                           140,386        142,359        176,530
- --------------------------------------------------------------------------------------------
Expenses
   Direct salaries and other operating costs           121,441        134,552        155,203
   General and administrative expenses                  17,800         25,345         26,941
   Pension curtailment gain                                 --         (3,899)            --
   Restructuring charges (credits)                          --         (1,668)        14,421
   Impairment of long-lived assets                          --          1,245          3,146
- --------------------------------------------------------------------------------------------
                                                       139,241        155,575        199,711
- --------------------------------------------------------------------------------------------
      Income (loss) from operations                      1,145        (13,216)       (23,181)
- --------------------------------------------------------------------------------------------
Other income (expense)
   Investment income                                     1,662          1,844          1,965
   Interest expense                                     (1,371)        (1,623)        (1,951)
   Other                                                    (6)           120            367
- --------------------------------------------------------------------------------------------
                                                           285            341            381
- --------------------------------------------------------------------------------------------

Income (loss) before income taxes                        1,430        (12,875)       (22,800)
Provision (benefit) for income taxes                       572         (1,450)        (6,145)
- --------------------------------------------------------------------------------------------

Net income (loss)                                  $       858    $   (11,425)   $   (16,655)
                                                   =========================================
Basic earnings (loss) per share                    $       .09    $     (1.18)   $     (1.74)
                                                   =========================================

Weighted average shares outstanding - basic          9,914,379      9,712,752      9,562,945
                                                   =========================================
Diluted earnings (loss) per share                  $       .09    $     (1.18)   $     (1.74)
                                                   =========================================

Weighted average shares outstanding - diluted        9,936,379      9,712,752      9,562,945
                                                   =========================================
</TABLE>

See notes to consolidated financial statements.


18
<PAGE>   11

                      ROY F. WESTON, INC. AND SUBSIDIARIES

                                           CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                              For the years ended December 31
                                                             --------------------------------
(Thousands of dollars)                                           1998        1997        1996
- ---------------------------------------------------------------------------------------------
Cash Flows from Operating Activities
- ---------------------------------------------------------------------------------------------
<S>                                                          <C>         <C>         <C>      
Net income (loss)                                            $    858    $(11,425)   $(16,655)

Adjustments to reconcile net income (loss)
   to net cash provided by operating activities:
      Depreciation and amortization                             3,770       5,396       7,833
      Provision for losses on accounts receivable                 704         511         291
      Pension curtailment gain                                     --      (3,899)         --
      Restructuring charges                                        --          --      14,421
      Impairment of long-lived assets                              --       1,245       3,146
      Other                                                      (438)       (174)     (1,040)

Change in assets and liabilities:
   Accounts receivable, trade                                  (6,683)     10,472      12,803
   Unbilled costs and estimated earnings on contracts
      in process                                                  380      (2,769)       (216)
   Other current assets                                        (1,733)        (60)        164
   Accounts payable and accrued expenses                        3,700       2,010         (36)
   Billings on contracts in process in excess of costs
       and estimated earnings                                  (3,336)      2,042      (3,113)
   Employee compensation, benefits and payroll taxes             (276)     (4,605)      1,488
   Income taxes                                                 1,143       1,558      (1,338)
   Deferred income taxes                                          301         424      (4,130)
   Other current liabilities                                   (2,793)     (1,927)     (2,166)
   Other assets and liabilities                                   236       3,476      (1,823)
- ---------------------------------------------------------------------------------------------
      Net cash provided by (used for) operating activities     (4,167)      2,275       9,629
- ---------------------------------------------------------------------------------------------
Cash Flows from Investing Activities

   Proceeds from sale of investments                            9,912      15,381      21,663
   Payments for purchase of investments                        (6,676)    (12,075)    (24,539)
   Purchase of property and equipment                          (2,036)     (2,670)     (3,052)
   Investments in other assets                                 (1,144)       (110)       (388)
- ---------------------------------------------------------------------------------------------
      Net cash provided by (used for) investing activities         56         526      (6,316)
- ---------------------------------------------------------------------------------------------
Cash Flows from Financing Activities

   Borrowings under line of credit                              1,900          --          --
   Principal payments under long-term debt                     (4,798)     (2,411)     (6,187)
   Proceeds from issuance of Series A common stock                235         583         971
   Purchase of Series A common treasury stock                      --         (84)     (1,199)
- ---------------------------------------------------------------------------------------------
      Net cash used for financing activities                   (2,663)     (1,912)     (6,415)
- ---------------------------------------------------------------------------------------------
      Net increase (decrease) in cash and cash equivalents     (6,774)        889      (3,102)
- ---------------------------------------------------------------------------------------------
Cash and Cash Equivalents

   Beginning of year                                           10,767       9,878      12,980
- ---------------------------------------------------------------------------------------------
   End of year                                               $  3,993    $ 10,767    $  9,878
                                                             ================================
</TABLE>

See notes to consolidated financial statements.


                                                                              19
<PAGE>   12

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FINANCIAL STATEMENTS
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
                                                          Series A
                                     Common Stock       Common Stock   Unrealized Gain
                                   ----------------    ---------------    (Loss on)
(Thousands of dollars and shares)  Shares    Amount    Shares   Amount   Investments
- --------------------------------------------------------------------------------------
<S>                                 <C>      <C>        <C>     <C>        <C>   
At January 1, 1996                  3,193    $  319     8,028   $  803     $  514
   Shares issued under employee                                          
      stock purchase plan              --        --       291       29         --
   Purchase of treasury stock          --        --        --       --         --
   Other                               --        --        --       --         27
   Net loss                            --        --        --       --         --
- --------------------------------------------------------------------------------------
                                                                         
At December 31, 1996                3,193       319     8,319      832        541
   Shares issued under employee                                          
      stock purchase plan              --        --       240       24         --
   Purchase of treasury stock          --        --        --       --         --
   Other                              (23)       (2)       23        2        192
   Net loss                            --        --        --       --         --
- --------------------------------------------------------------------------------------
                                                                         
At December 31, 1997                3,170       317     8,582      858        733
   Shares issued under employee                                          
      stock purchase plan              --        --        69        7         --
   Other                               --        --        --       --       (136)
   Net income                          --        --        --       --         --
- --------------------------------------------------------------------------------------
At December 31, 1998                3,170    $  317     8,651   $  865     $  597
                                    ==================================================
</TABLE>

See notes to consolidated financial statements.


20
<PAGE>   13

                      ROY F. WESTON, INC. AND SUBSIDIARIES

<TABLE>
<CAPTION>
                                        Treasury Stock
                             -------------------------------------
Additional
  Paid-in     Retained       Common       Series A
  Capital     Earnings       Shares     Common Shares      Amount       Total
- --------------------------------------------------------------------------------
<S>           <C>            <C>            <C>          <C>          <C>     
 $ 54,143     $ 30,929       (1,081)        (513)        $ (3,807)    $ 82,901
                                                      
      942           --           --           --               --          971
       --           --           --         (257)          (1,199)      (1,199)
       45           --           --           --               --           72
       --      (16,655)          --           --               --      (16,655)
- --------------------------------------------------------------------------------
                                                      
   55,130       14,274       (1,081)        (770)          (5,006)      66,090
                                                      
      559           --           --           --               --          583
       --           --           --          (23)             (84)         (84)
       11           --           --           --               --          203
       --      (11,425)          --           --               --      (11,425)
- --------------------------------------------------------------------------------
                                                      
   55,700        2,849       (1,081)        (793)          (5,090)      55,367
                                                      
      228           --           --           --               --          235
       --           --           --           --               --         (136)
       --          858           --           --               --          858
- --------------------------------------------------------------------------------
 $ 55,928     $  3,707       (1,081)        (793)        $ (5,090)    $ 56,324
================================================================================
</TABLE>


                                                                              21
<PAGE>   14

                      ROY F. WESTON, INC. AND SUBSIDIARIES

[LOGO] FOOTNOTES

Note 1 - Nature of Operations

The Company provides services to industry, the federal government, and public
works and local government markets. Services provided include infrastructure
redevelopment, federal program management, and knowledge systems and solutions.
The Company's services are provided primarily in the United States, although
services in foreign nations are performed.

Note 2 - Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements include the accounts of the Company and
its subsidiaries. All material intercompany accounts and transactions have been
eliminated in consolidation. The preparation of financial statements in
conformity with generally accepted accounting principles requires management to
make estimates and assumptions that affect the reported amounts of assets and
liabilities and disclosure of contingent assets and liabilities at the date of
the financial statements, and the reported amounts of revenues and expenses
during the reporting period. Actual results could differ from those estimates.

Cash Equivalents and Investments

The Company considers all highly liquid investments with a remaining maturity of
three months or less at the time of purchase to be cash equivalents. Cash and
cash equivalents consist of cash on hand, demand deposit accounts, and
investments in corporate commercial paper and U.S. Government securities.
Marketable securities are stated at fair value. Realized gains and losses are
computed based on specific identification.

Marketable equity and debt securities available for current operations include
investments in corporate commercial paper and U.S. Government debt securities,
and are classified as current assets in the accompanying consolidated balance
sheets. Investments held by the Company's wholly-owned captive insurance
subsidiary include equity and bond mutual funds, and are classified as
noncurrent assets in the accompanying consolidated balance sheets.

Property and Equipment

Property and equipment are carried at cost. Depreciation is provided primarily
on the straight-line method over the assets' estimated useful lives of 10 to 40
years for buildings and improvements and 3 to 10 years for furniture and
equipment. Leasehold improvements are amortized over the shorter of the lease
period or estimated useful life on the straight-line method. Property and
equipment leased under capital leases are recorded at the lower of fair market
value or the present value of future lease payments. Property and equipment
under these leases are amortized on a straight-line basis, generally over the
assets' estimated useful lives. When property or equipment is sold or retired,
the cost of the asset and related accumulated depreciation are removed from the
balance sheet and any gain or loss is included in results of operations.

Goodwill

Goodwill arising from the excess of purchase price over the underlying fair
value of net assets of acquired subsidiaries is amortized on the straight-line
method over a 40-year period. The Company annually evaluates whether changes
have occurred that would require revision of the remaining estimated useful life
of goodwill.

Long-Lived Asset Impairment

The Company reviews its long-lived assets for impairment on an exception basis
whenever events or changes in circumstances indicate that the carrying amount of
the assets may not be recoverable through future cash flows. If it is determined
that an impairment loss has occurred, the loss is recognized in the consolidated
statement of operations.


22
<PAGE>   15

                      ROY F. WESTON, INC. AND SUBSIDIARIES

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

Income Taxes

The Company provides deferred income taxes on all temporary differences between
the tax and financial reporting bases of its assets and liabilities. A valuation
allowance is recorded to reduce deferred tax assets to the amount that is
expected to more likely than not be realized.

Contract Revenue Recognition

The Company provides professional engineering, consulting and other services
under cost-plus-fee, time and materials, and fixed-price contracts. Revenues
from contracts are recorded on the percentage-of-completion method of
accounting, determined by relating contract costs incurred to date to total
estimated contract costs at completion. Estimated award fees on certain
long-term federal contracts are included in revenues at the time the amounts can
be reasonably determined. Revenues associated with U.S. Government indirect
rates are adjusted when variances are determined on at least an annual basis.
Provisions for estimated contract losses are recorded when identified.

Stock-Based Compensation

The Company has elected not to adopt Statement of Financial Accounting Standards
No. 123, "Accounting for Stock-Based Compensation," but continues to use
Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued to
Employees," to account for its stock-based compensation programs, including its
Stock-Based Incentive Compensation Plan and Employee Stock Purchase Plan. Under
Opinion No. 25, no compensation expense is recognized for grants of stock
options if the exercise price is not less than market value at the date of
grant, and employee stock purchase plans that qualify under Section 423 of the
Internal Revenue Code are considered noncompensatory. Proforma disclosures
required under Statement No. 123 are included in Note 9 to the consolidated
financial statements.

Note 3 - Restructuring and Impairment Charges

During the third quarter of 1996, the Company adopted plans to withdraw from the
analytical laboratory business, close or reduce the size of certain office
facilities, and reduce the size of its workforce. The Company recorded
restructuring charges aggregating $14,421,000, consisting principally of
writedown of assets, severance costs for terminated employees, costs of idle
facilities, and estimated loss on disposal of the analytical laboratory
business. At December 31, 1998 and 1997, respectively, the Company had accruals
aggregating $593,000 and $1,433,000, respectively, included as other current
liabilities in the accompanying consolidated balance sheets, for costs,
principally lease payments, to be incurred in future periods as a result of the
restructuring.

During 1997, the Company completed the sale of net assets of its analytical
laboratory business and the sale of another subsidiary. The proceeds from these
transactions exceeded amounts anticipated in recording the 1996 restructuring
charge. The excess is included as restructuring credits in the accompanying
consolidated statement of operations for the year ended December 31, 1997.

In addition, the Company recorded impairment charges of $1,245,000 and
$3,146,000 in 1997 and 1996, respectively, in accordance with Statement of
Financial Accounting Standards No. 121. The impairment charges reduced the
carrying value of the Company's financial and project software in 1997 and its
thermal incineration assets and a minority interest in a bioremediation company
in 1996 to their estimated fair values.


                                                                              23
<PAGE>   16

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FOOTNOTES

Note 4 - Investments

The Company's investments are classified as available-for-sale securities and
recorded at current market value with an offsetting adjustment included in
stockholders' equity. 

Investments in debt and equity securities at December 31 consisted of the
following:

<TABLE>
<CAPTION>
                                                       =========================
(Thousands of dollars)                                    1998             1997
- --------------------------------------------------------------------------------
<S>                                                    <C>              <C>    
Fair Value:
   Current                                             $ 1,547          $ 4,168
   Noncurrent                                            3,853            4,344
- --------------------------------------------------------------------------------
                                                         5,400            8,512

Gross unrealized holding gains                            (950)          (1,130)
Gross unrealized holding losses                             45               19
- --------------------------------------------------------------------------------
Cost basis of investments                              $ 4,495          $ 7,401
                                                       =========================
</TABLE>

Investment activity for the years ended December 31 was as follows:

<TABLE>
<CAPTION>
                                               =================================
(Thousands of dollars)                             1998        1997        1996
- --------------------------------------------------------------------------------
<S>                                            <C>         <C>         <C>     
Proceeds from sale of investments              $  9,912    $ 15,381    $ 21,663
- --------------------------------------------------------------------------------
Gross realized gains                           $    461    $    270    $    294
- --------------------------------------------------------------------------------
Gross realized losses                          $     --    $     --    $    (15)
- --------------------------------------------------------------------------------

Change in unrealized holding gain              $   (206)   $    291    $     41

Deferred income taxes                                70         (99)        (14)
- --------------------------------------------------------------------------------

Net change in unrealized holding gain          $   (136)   $    192    $     27
                                               =================================
</TABLE>

Realized gains and losses are determined on a specific identification basis and
included in investment income in the accompanying consolidated statements of
operations.


24
<PAGE>   17

                      ROY F. WESTON, INC. AND SUBSIDIARIES

Note 5 - Accounts Receivable and Unbilled Costs and Estimated Earnings

Trade accounts receivable at December 31 consisted of the following:

<TABLE>
<CAPTION>
                                                          ======================
(Thousands of dollars)                                       1998           1997
- --------------------------------------------------------------------------------
<S>                                                       <C>            <C>    
Industrial clients                                        $16,003        $15,185
State and municipal governments                            13,913         12,304
U.S. Government agencies                                   31,674         28,393
Retentions                                                    768            365
- --------------------------------------------------------------------------------
                                                           62,358         56,247
Less allowance for doubtful accounts                        1,882          1,750
- --------------------------------------------------------------------------------
                                                          $60,476        $54,497
                                                          ======================
</TABLE>

Unbilled costs and estimated earnings consisted of the following:

<TABLE>
<CAPTION>
                                                          ======================
(Thousands of dollars)                                       1998           1997
- --------------------------------------------------------------------------------
<S>                                                       <C>            <C>    
Industrial clients                                        $ 2,564        $ 5,447
State and municipal governments                             6,751          5,260
U.S. Government agencies                                   10,952          9,695
Retentions                                                    273            518
- --------------------------------------------------------------------------------
                                                          $20,540        $20,920
                                                          ======================
</TABLE>

The Company does not believe there is any undue credit risk in connection with
realization of its accounts receivable.

Unbilled costs and estimated earnings can be invoiced upon attaining certain
milestones under fixed-price contracts, completion of federal government
indirect rate audits, final approval of design plans for engineering services,
and completion of construction on certain projects. Billed and unbilled
retentions of $1,041,000 at December 31, 1998 include $534,000 which is expected
to be collected during 2000 and thereafter.

Note 6 - Line of Credit Agreement

The Company has an $18,000,000 revolving credit facility with a bank to provide
cash borrowings and letters of credit that expires on June 5, 2000. The facility
is collateralized by liens on substantially all of the Company's tangible and
intangible assets, excluding real estate. The facility is for a two-year period
with a one-year renewal option and is available for working capital and other
general corporate purposes, including permitted acquisitions.

Under the terms of the agreement, cash borrowings bear interest at 1% over the
prime interest rate or, at 


                                                                              25
<PAGE>   18

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FOOTNOTES

the Company's option, other variable rates. Cash borrowings for purposes other
than acquisitions are limited to 125% of cash and marketable securities pledged
by the Company. The Company is subject to a 3/8% annual charge on the unused
portion of the facility. The agreement requires the Company to maintain minimum
levels of cash and marketable securities, tangible net worth and certain
financial ratios and restricts dividend payments, certain expenditures and debt
outside the agreement.

The Company had $1,900,000 of outstanding cash borrowings under the facility at
December 31, 1998 and had outstanding letters of credit aggregating $2,592,000.

Note 7 - Long-Term Debt

Long-term debt at December 31 consisted of the following:

<TABLE>
<CAPTION>
                                                               =================
(Thousands of dollars)                                            1998      1997
- --------------------------------------------------------------------------------
<S>                                                            <C>       <C>    
7% Convertible Subordinated Debentures due April 15, 2002      $13,958   $17,929

Bank term loan, payable in quarterly installments of
    $500,000 plus interest at 5.85% through January 1, 1998         --       500

Capitalized lease obligations                                      739       369
- --------------------------------------------------------------------------------
      Total debt                                                14,697    18,798
      Less current maturities                                    1,700     2,914
- --------------------------------------------------------------------------------
                                                               $12,997   $15,884
                                                               =================
</TABLE>

The 7% Convertible Subordinated Debentures (the Debentures) are due April 15,
2002 and are convertible into the Company's Series A common stock at a
conversion price of $21.13 per share. The Company has the option to redeem the
Debentures at a redemption price of 100%.

The Company is required to redeem annually 10% of the principal amount of the
Debentures, so as to retire 80% of the Debentures prior to maturity. During
1998, 1997 and 1996, the Company repurchased $3,971,000, $186,000 and $3,715,000
principal amount of Debentures, respectively, thus satisfying redemption
requirements through 1998 and a portion of the 1999 redemption requirement.
Debentures aggregating $1,398,000 need to be repurchased by April 15, 1999. The
gains on redemption of $157,000, $21,000 and $273,000 in 1998, 1997 and 1996,
respectively, have been included in other income in the consolidated statements
of operations. The Debentures are uncollateralized and subordinated to all
senior indebtedness. The costs of issuing the Debentures have been deferred and
are being amortized over the life of the debt.

The Debenture Indenture limits the amount of dividends the Company may declare
and limits the funds the Company and its subsidiaries may use to 


26
<PAGE>   19

                      ROY F. WESTON, INC. AND SUBSIDIARIES

purchase, redeem or retire the Company's capital stock. The Indenture also
provides that the Company must maintain a minimum tangible net worth or offer to
purchase 10% of the principal amount of the Debentures issued at their principal
amount plus accrued interest.

The fair value of the Debentures based on quoted market price at December 31,
1998 and 1997 was $12,946,000 and $16,226,000, respectively.

Maturities of long-term debt are as follows:

Years Ending December 31 (Thousands of dollars)

<TABLE>
<S>                                                                   <C>       
      1999                                                            $    1,700
      2000                                                                 3,436
      2001                                                                 3,250
      2002                                                                 6,300
      2003                                                                    11
- --------------------------------------------------------------------------------
                                                                      $   14,697
                                                                      ==========
</TABLE>
                 
Note 8 - Leases

The Company leases certain office facilities and equipment under operating
leases. These leases generally provide for renewal options, and the office
leases include escalation clauses based on increases in real estate taxes and
operating expenses. For certain office facilities, the Company obtains
reimbursements for rental expense under long-term U.S. Government projects.

Minimum annual lease commitments under noncancelable leases principally for
office facilities are as follows:

Years ending December 31 (Thousands of dollars)

<TABLE>
<S>                                                                   <C>       
      1999                                                            $    3,369
      2000                                                                 2,675
      2001                                                                 2,019
      2002                                                                 1,418
      2003                                                                 1,614
      Thereafter                                                          13,637
- --------------------------------------------------------------------------------
                                                                      $   24,732
                                                                      ==========
</TABLE>

The following is a summary of rental expense for the years ended December 31:

<TABLE>
<CAPTION>
                                         =======================================
(Thousands of dollars)                       1998           1997           1996
- --------------------------------------------------------------------------------
<S>                                      <C>            <C>            <C>     
Gross rental expense                     $ 12,210       $ 15,068       $ 18,331
Reimbursed as
   direct project expenses                 (7,497)        (6,897)        (6,585)
- --------------------------------------------------------------------------------
Net rental expense                       $  4,713       $  8,171       $ 11,746
                                         =======================================
</TABLE>


                                                                              27
<PAGE>   20

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FOOTNOTES

Note 9 - Common Stock

The Company's Common stock and Series A common stock are equivalent except that
each share of Common stock has one vote per share and each share of Series A
common stock has one-tenth of one vote per share.

The Company has a Stock-Based Incentive Compensation Plan (Option Plan) that
provides for the grant to employees of nonqualified stock options and options
designed to qualify as "incentive stock options" under the Internal Revenue
Code. An option gives the participant the right to purchase from the Company a
specified number of shares of Series A common stock for a specified price during
a specified period not exceeding 10 years. A total of 1,075,000 shares of Series
A common stock have been reserved for issuance under the Option Plan pursuant to
the exercise of options. All options must have an exercise price of not less
than fair market value of the underlying shares on the date of grant. Options
granted under the Option Plan have all had a life of 10 years and generally vest
at the rate of 20% on each of the first 5 anniversary dates of the grant.
Payment by option holders upon exercise of an option may be made in cash, or by
delivering previously owned shares of Common stock, Series A common stock, or
any combination thereof.

Option activity under the Option Plan is summarized as follows:

<TABLE>
<CAPTION>
                                      ======================================================
                                                          Option Price      Weighted Average
                                      Number of Shares      per Share       Price per Share
- --------------------------------------------------------------------------------------------
<S>                                      <C>              <C>                   <C>   
Outstanding at January 1, 1996            630,720         $4.44 - $14.50        $ 8.93
 Granted                                  159,600         $4.00 - $ 4.75        $ 4.61
 Exercised                                     --               --                  --
 Canceled                                (134,420)        $4.75 - $14.50        $ 8.85
- --------------------------------------------------------------------------------------------
Outstanding at December 31, 1996          655,900         $4.00 - $14.50        $ 7.89
 Granted                                  689,016         $2.75 - $ 4.25        $ 3.84
 Exercised                                     --               --                  --
 Canceled                                (492,300)        $3.75 - $14.50        $ 8.14
- --------------------------------------------------------------------------------------------
Outstanding at December 31, 1997          852,616         $2.75 - $14.50        $ 4.47
 Granted                                       --               --                  --
 Exercised                                     --               --                  --
 Canceled                                 (83,467)        $3.75 - $14.50        $ 6.12
- --------------------------------------------------------------------------------------------
Outstanding at December 31, 1998          769,149         $2.75 - $14.50        $ 4.29
                                      ======================================================
 Exercisable at December 31, 1996         346,580         $4.44 - $14.50        $ 9.05
 Exercisable at December 31, 1997         120,600         $4.00 - $14.50        $ 7.13
 Exercisable at December 31, 1998         149,710         $3.75 - $14.50        $ 5.70
</TABLE>

At December 31, 1998 there were 191,551 shares of Series A common stock
available for further grants under the Option Plan. The weighted average
remaining contractual life of options outstanding at December 31, 1998 was 7.95
years.

Options granted during 1997 include options for 435,000 shares which will vest
if the fair market value of the Company's Series A common stock attains certain
thresholds, and remains at or above the prescribed market value for at least 90
days.


28
<PAGE>   21

                      ROY F. WESTON, INC. AND SUBSIDIARIES

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

There are five incremental thresholds, and 20% of the options will vest as each
condition is met. These options will fully vest 9 years from the date of grant,
if not vested or terminated at an earlier date. Also included in 1997 grants are
options for 22,216 shares at an exercise price of $4.25 per share. These options
replaced options for 124,300 shares originally issued in 1990, 1992, and 1993 at
exercise prices ranging from $7.75 to $14.50 per share.

The Company also has an Employee Stock Purchase Plan (Purchase Plan), which
provides for the purchase of Series A common stock by eligible employees. The
Purchase Plan is designed to qualify as a noncompensatory employee stock
purchase plan as defined in Section 423 of the Internal Revenue Code. A total of
2,425,000 shares of Series A common stock have been reserved for issuance under
the Purchase Plan. The price per share of Series A common stock is equal to 85%
of the lower of the closing market price of Series A common stock on the first
trading day of each semi-annual purchase period, or the last trading day of such
purchase period. During the years ended December 31, 1998, 1997, and 1996,
respectively, 68,737, 240,054 and 291,120 shares were issued under the Purchase
Plan at prices ranging from $2.34 per share to $3.83 per share. Substantially
all of the shares reserved for issuance under the Purchase Plan have been
distributed as of July 1, 1998, and the Purchase Plan has terminated in
accordance with its terms.

Statement of Financial Accounting Standards No. 123, which the Company has
elected not to adopt, would require the determination of compensation cost for
awards under the Option Plan and issuances under the Purchase Plan based on
their fair value. If the 1996, 1997 and 1998 awards and issuances had been
accounted for in accordance with Statement No. 123, the Company's proforma net
income (loss) and basic earnings (loss) per share for the years ended December
31 would approximate the amounts below:

<TABLE>
<CAPTION>
                                       =========================================
(Thousands of dollars,
except per share amounts)                    1998         1997             1996
- --------------------------------------------------------------------------------
<S>                                    <C>          <C>              <C>        
Net income (loss)                      $      557   $  (11,823)      $  (16,834)

Basic earnings
   (loss) per  share                   $      .06   $    (1.22)      $    (1.76)
================================================================================
</TABLE>

The impacts of applying Statement No. 123 in the proforma disclosure are not
indicative of future amounts. Statement No. 123 does not apply to awards and
issuances prior to 1995, and additional awards and issuances in future years are
anticipated.

Fair values used in calculating the proforma disclosures under Statement No. 123
were determined using the Black-Scholes option pricing model. There were no
option grants in 1998. Significant assumptions used and results follow:

<TABLE>
<CAPTION>
================================================================================
                                              1997                     1996
- --------------------------------------------------------------------------------
<S>                                       <C>                      <C>          
Risk-free interest rates                  6.28% - 6.78%            6.28% - 7.33%
Volatility                                    59% - 96%                48% - 59%
Dividends                                          None                     None
Fair value                                $2.19 - $3.85            $2.82 - $3.43
================================================================================
</TABLE>

Note 10 - Employee Benefit Plans

The Company has a defined benefit pension plan (Retirement Income Plan) which
covered substantially all of its employees until July 1, 1997. Effective that
date, benefits under the Retirement Income Plan were frozen resulting in the
recognition of a curtailment gain of $3,899,000. In addition, the Company has
nonqualified supplementary retirement plans (Supplemental Plans) that provide
additional benefits to certain executives. The Company also provides certain
postretirement medical benefits.


                                                                              29
<PAGE>   22

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FOOTNOTES

The following provides a reconciliation of benefit obligations, plan assets and
funded status of the plans:

<TABLE>
<CAPTION>
                                                  ==============================================
                                                  Retirement      Supplemental    Postretirement
                                                  Income Plan         Plans           Medical
- ------------------------------------------------------------------------------------------------
(Thousands of dollars)
<S>                                                 <C>             <C>             <C>     
Change in benefit obligation
   Benefit obligation at January 1, 1997            $ 33,942        $  2,932        $    776
      Service cost                                       979              76              51
      Interest cost                                    2,435             220              68
      Plan amendments                                 (4,391)           (110)             --
      Special termination benefits                        --             119              --
      Benefits paid                                     (524)           (197)            (64)
      Actuarial (gain) or loss                           505              28             169
- ------------------------------------------------------------------------------------------------
   Benefit obligation at December 31, 1997          $ 32,946        $  3,068        $  1,000
      Service cost                                        --              40              68
      Interest cost                                    2,360             212              77
      Plan amendments                                     --              --              --
      Special termination benefits                        --              58              --
      Benefits paid                                   (1,133)           (204)           (161)
      Actuarial (gain) or loss                         2,734             (29)            213
      Participant contributions                           --              --               8
- ------------------------------------------------------------------------------------------------
Benefit obligation at December 31, 1998             $ 36,907        $  3,145        $  1,205
                                                  ==============================================

Change in plan assets                                                              
   Fair value of plan assets at January 1, 1997     $ 26,209        $     --        $     --
      Actual return on plan assets                     5,843              --              --
      Employer contributions                           2,823             197              64
      Benefits paid                                     (524)           (197)            (64)
      Expenses                                           (88)             --              --
- ------------------------------------------------------------------------------------------------
   Fair value of plan assets at December 31, 1997   $ 34,263              --              --
- ------------------------------------------------------------------------------------------------
      Actual return on plan assets                     6,774              --              --
      Employer contributions                             796             204             153
      Participant contributions                           --              --               8
      Benefits paid                                   (1,133)           (204)           (161)
      Expenses                                          (147)             --              --
- ------------------------------------------------------------------------------------------------
  Fair value of plan assets at December 31, 1998    $ 40,553              --              --
                                                  ==============================================
                                                                                   
                                                                                   
Reconciliation of funded status:                                                   
At December 31, 1997                                                               
      Funded status                                 $  1,317        $ (3,068)       $ (1,000)
      Unrecognized actuarial (gain) loss                (474)            939            (800)
      Unrecognized transition (asset) obligation          --              73           1,110
      Unrecognized prior service cost                     --              24              --
                                                                                   
Net amount recognized                               $    843        $ (2,032)       $   (690)
- ------------------------------------------------------------------------------------------------
At December 31, 1998                                                               
      Funded status                                 $  3,646        $ (3,145)       $ (1,205)
      Unrecognized actuarial (gain) loss              (1,558)            869            (528)
      Unrecognized transition (asset) obligation          --              55           1,036
      Unrecognized prior service cost                     --              19              --
- ------------------------------------------------------------------------------------------------

Net amount recognized                               $  2,088        $ (2,202)       $   (697)
                                                  ==============================================
</TABLE>


30
<PAGE>   23

                      ROY F. WESTON, INC. AND SUBSIDIARIES

The components of net periodic benefit cost for the years ended December 31 are
as follows:

<TABLE>
<CAPTION>
                                                  ==============================
(Thousands of dollars)                               1998       1997       1996
- --------------------------------------------------------------------------------
<S>                                               <C>        <C>        <C>    
Retirement income plan:
    Service cost                                  $    --    $   979    $ 2,352
    Interest cost                                   2,360      2,435      2,421
    Expected return on plan assets                 (2,809)    (2,500)    (1,960)
    Amortization of prior service cost                 --         (7)       (15)
    Amortization of transitional obligation            --         16         32
    Recognized actuarial loss                          --         --        310
- --------------------------------------------------------------------------------
Net periodic benefit cost (credit)                $  (449)   $   923    $ 3,140
                                                  ==============================
Supplemental plans
    Service cost                                  $    40    $    76    $   105
    Interest cost                                     211        220        200
    Amortization of prior service cost                  5         13         21
    Amortization of transitional obligation            18         18         18
    Recognized actuarial loss                          41         54         78
- --------------------------------------------------------------------------------
Net periodic benefit cost                         $   315    $   381    $   422
                                                  ==============================
Postretirement medical:
    Service cost                                  $    68    $    51         24
    Interest cost                                      77         68         54
    Amortization of transition obligation              74         74         74
    Recognized actuarial gain                         (59)       (79)      (106)
- --------------------------------------------------------------------------------
Net periodic benefit cost                         $   160    $   114    $    46
                                                  ==============================
</TABLE>

In addition, the Company recorded charges under the Supplemental Plans of
$58,000, $129,000 and $134,000 in 1998, 1997 and 1996, respectively, for vested
benefits of former executives.

Significant assumptions used in the benefit plans at December 31 were:

<TABLE>
<CAPTION>
                                                             ===================
                                                                1998       1997
<S>                                                          <C>        <C>    
Retirement income plan:

     Weighted average discount rate                             6.90%      7.25%
     Expected long-term rate of return on plan assets           9.25%      9.25%
     Rate of compensation increase                              5.00%      5.00%

Supplemental plans:
     Weighted average discount rate                             6.90%      7.25%

Postretirement medical:
     Weighted average discount rate                             6.90%      7.25%
     Initial health care cost trend rate                        9.00%     10.00%
     Ultimate health care cost trend rate                       5.50%      5.50%
     Grading period                                          5 years    6 years
                                                             ===================
</TABLE>


                                                                              31
<PAGE>   24

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FOOTNOTES

Assumed health care cost trend rates can have a significant effect on amounts
reported for the postretirement medical plan. A 1% change in the assumed health
care cost trend rates would increase the aggregate of service cost and interest
cost for 1998 by $8,000 and the accumulated postretirement benefit obligation at
December 31, 1998 by $78,000.

The Company also has a Retirement Savings Plan (Savings Plan) which provides
that the Company will supplement an employee's contribution (which may not
exceed 12% of compensation). Employees are eligible to participate in the
Savings Plan at the beginning of the quarter after their hire but do not receive
the supplement until the quarter after completion of one year of service. The
Company has agreed to contribute to the Savings Plan an amount equal to 50% of
the first 6% of an employee's contributions. Company contributions resulted in
charges to earnings of $1,653,000, $1,951,000 and $2,335,000 for the years ended
December 31, 1998, 1997 and 1996, respectively. In addition, effective July 1,
1997, the Company began making an additional contribution to the Plan. The
additional contribution, which aggregated $1,508,000 in 1998 and $879,000 in
1997, is made for the benefit of all eligible employees and is not dependent on
an employee contribution.

The Company maintains medical and dental plans for its eligible employees on a
primarily self-funded basis. Claims in excess of specified individual and
aggregate amounts are covered by insurance. Costs and premiums in the financial
statements for the years ended December 31, 1998, 1997 and 1996 for these plans
were $2,771,000, $3,181,000 and $3,363,000, respectively.

Note 11 - Contingencies

As collateral for performance on contracts, the Company is contingently liable
at December 31, 1998 in the amount of $2,592,000, under standby letters of      
credit. A substantial portion of the Company's gross revenues is derived from
work involving hazardous materials, toxic wastes and other pollutants. Such
efforts frequently entail significant risks of liability for environmental
damage, personal injury, and fines and costs imposed by regulatory agencies. A
substantial number of the Company's contracts require indemnification of a
client for performance claims, damages or losses unless such injury or damage
is solely the result of the client's negligence or willful acts. The Company
has been able to insure against most liabilities it may incur in this regard. 

The Company has obtained coverage with commercial carriers to insure against
pollution liability claims. Although this insurance covers many of the Company's
environmental exposures, there are instances where project-specific pollution
insurance policies are necessary. The Company will continue to evaluate
exposures associated with each project to determine if additional coverage is
necessary. The Company is partially self-insured through its subsidiary,
Cardinal Indemnity Company of North America, a captive insurance company.
Cardinal provides professional liability and pollution coverage for deductible
amounts of the commercial insurance coverage.

While the insurance carried by the Company may not be sufficient to cover all
claims that may arise, and while insurance carriers may not continue to make
coverage available to the Company, management believes it has provided an
adequate level of insurance coverage.

The Company is subject to certain claims and lawsuits in connection with work
performed in the ordinary course of its business. In the opinion of management,
such claims and lawsuits will not have a material adverse effect on the
financial position or results of operations of the Company.


32
<PAGE>   25

                      ROY F. WESTON, INC. AND SUBSIDIARIES

Note 12 - Income Taxes

The components of the provision (benefit) for income taxes are as follows:

<TABLE>
<CAPTION>
                                          =====================================
(Thousands of dollars)                       1998           1997           1996
- -------------------------------------------------------------------------------
<S>                                       <C>            <C>            <C>     
Current
  Federal                                 $   149        $(1,905)       $(2,061)
  State                                       122             30             46
- -------------------------------------------------------------------------------
                                              271         (1,875)        (2,015)
- -------------------------------------------------------------------------------
Deferred
  Federal                                     301            425         (4,729)
  State                                        --             --            599
- -------------------------------------------------------------------------------
                                              301            425         (4,130)
- -------------------------------------------------------------------------------
                                          $   572        $(1,450)       $(6,145)
                                          =====================================
</TABLE>

Temporary differences that give rise to deferred tax assets and liabilities at
December 31 are as follows:

<TABLE>
<CAPTION>
                                                       ========================
(Thousands of dollars)                                     1998            1997
- --------------------------------------------------------------------------------
<S>                                                    <C>             <C>     
Deferred tax assets:
   Uncollectible accounts                              $    110        $     --
   Net operating loss carryforwards                       6,626           5,331
   Pensions                                               1,419           1,400
   Self insurance                                         1,647           2,202
   Other accruals                                         1,299             702
   Depreciation                                              --             423
   Facility closure                                       1,450           2,571
   State tax loss carryforwards                           2,942           2,156
   Other                                                  1,925           1,773
- --------------------------------------------------------------------------------
                                                       $ 17,418        $ 16,558
- --------------------------------------------------------------------------------
Deferred tax liabilities:
   Amortization                                        $     --        $    (24)
   Retainage                                               (174)           (635)
   Award fees                                              (312)           (168)
   Other                                                 (1,192)           (577)
- --------------------------------------------------------------------------------
                                                         (1,678)         (1,404)

Valuation allowance                                      (7,742)         (6,925)
- --------------------------------------------------------------------------------
Net deferred income taxes                              $  7,998        $  8,229
                                                       ========================
</TABLE>


                                                                              33
<PAGE>   26

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FOOTNOTES

At December 31, 1998, the Company has federal net operating loss carryforwards
of approximately $19,488,000, principally expiring in 2012. The Company's net
deferred tax assets include substantial amounts of net operating loss
carryforwards. Failure to achieve forecasted amounts of taxable income in future
periods could affect the ultimate realization of net deferred tax assets. A
valuation allowance has been established for certain deferred tax assets since,
based on the weight of available evidence, it is more likely than not that a
portion of these assets will not be realized.

The reconciliations of the effective tax rate to that based on the federal
statutory rate for the years ended December 31 are as follows:

<TABLE>
<CAPTION>
                                                    ===========================
                                                    1998       1997       1996
- --------------------------------------------------------------------------------
<S>                                                 <C>        <C>        <C>  
Statutory rate                                      34.0%      34.0%      34.0%
Valuation allowance                                  2.5      (23.3)        -- 
State income taxes, net of federal taxes             5.7       (0.2)      (1.9)
Amortization of goodwill                             1.5       (0.2)      (4.2)
Travel-related meals                                 5.7       (0.8)      (0.5)
Officers life insurance                             (5.8)      (0.1)       0.1
Other, net                                          (3.6)       1.9       (0.5)
- --------------------------------------------------------------------------------
Effective tax rate                                  40.0%      11.3%      27.0%
                                                    ===========================
</TABLE>

Note 13 - Major Customer Information

The Company's largest customer is the U.S. Government and its agencies which
provided the following gross revenues for the years ended December 31:

                                            ====================================
(Thousands of dollars)                          1998          1997          1996
- --------------------------------------------------------------------------------
Department of Defense                       $ 60,892      $ 50,146      $ 55,488
Environmental Protection Agency               50,842        47,285        46,285
Department of Energy                          20,229        25,379        35,230
Other                                          4,600         6,528         8,204
- --------------------------------------------------------------------------------
Total U.S. Government                       $136,563      $129,338      $145,207
                                            ====================================


34
<PAGE>   27

                      ROY F. WESTON, INC. AND SUBSIDIARIES

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

Note 14 - Supplemental Cash Flow Information

Cash payments for income taxes were $51,000, $192,000 and $101,000 in the years
ended December 31, 1998, 1997 and 1996, respectively. The Company received
refunds of previously paid income taxes aggregating $1,136,000, $3,672,000 and
$759,000 in the years ended December 31, 1998, 1997 and 1996, respectively.

Cash payments for interest were $1,218,000, $1,464,000 and $1,859,000 in the
years ended December 31, 1998, 1997 and 1996, respectively.

Capital lease obligations of $697,000, $128,000 and $334,000 were incurred
during the years ended December 31, 1998, 1997 and 1996, respectively, when the
Company entered into leases for office equipment.

Note 15 -  Related Party Transactions

The Company used the services of a travel agency that was owned by one of its
directors. Under an agreement entered into in early 1996, the Company paid the
travel agency a monthly fee and received rebates from the travel agency of the
commissions earned from providers of transportation and other travel-related
services. Net expenses for the travel agency included in general and
administrative expenses in the accompanying consolidated statements of
operations in 1998, 1997 and 1996 were $285,000, $280,000 and $286,000,
respectively. 

In June 1998 the above arrangement was terminated, and the Company's travel
requirements are handled internally using contracted labor. The director has
been retained as a consultant to the travel department and in 1998 was paid
$75,000 in this capacity.

Also, in 1997 the Company entered into consulting contracts with several of its
directors. Fees charged under these consulting contracts aggregated $349,000 in
1997.

Note 16 - Comprehensive Income

The Financial Accounting Standards Board has issued Statement of Financial
Accounting Standards No. 130, "Reporting Comprehensive Income." The statement,
which became effective January 1, 1998, establishes rules for the reporting of
comprehensive income and its components in financial statements. Comprehensive
income consists of net income, adjusted for other increases and decreases
affecting stockholders' equity that, under generally accepted accounting
principles, are excluded from the determination of net income.

Comprehensive income (loss) for the years ended December 31 follows:

<TABLE>
<CAPTION>
                                                       ================================
Thousands of dollars                                       1998        1997        1996
- ---------------------------------------------------------------------------------------
<S>                                                    <C>         <C>         <C>      
Net income (loss)                                      $    858    $(11,425)   $(16,655)

Change in unrealized gain on investments, net of tax       (136)        192          27
- ---------------------------------------------------------------------------------------
Comprehensive income (loss)                            $    722    $(11,233)   $(16,628)
                                                       ================================
</TABLE>


                                                                              35
<PAGE>   28

                      ROY F. WESTON, INC. AND SUBSIDIARIES

FOOTNOTES

Note 17 - Segments

The Financial Accounting Standards Board has adopted Statement of Financial
Accounting Standards No. 131, "Disclosures about Segments of an Enterprise and
Related Information," effective for fiscal years ending after December 15, 1998.
Under Statement No. 131, the Company has defined its reportable segments as
Infrastructure Redevelopment, Federal Programs, and Knowledge Systems and
Solutions. Federal Programs is segregated primarily because its services are
delivered to clients at dedicated site Federal government locations, while
Knowledge Systems and Solutions is segregated due to differences in its products
and services from the Company's other businesses.

The following information for the year ended December 31, 1998 is required by
Statement No. 131. Information for prior periods is not presented as it is
impractical to develop such information as the Company undertook a significant
reorganization in 1997.

<TABLE>
<CAPTION>
                                   ================================================================================
(Thousands of dollars)             Infrastructure      Federal        Knowledge        Corporate      Consolidated
                                    Redevelopment     Programs      Systems and
                                                                     Solutions
- -------------------------------------------------------------------------------------------------------------------
<S>                                   <C>             <C>             <C>              <C>              <C>     
Net revenues                          $110,937        $ 24,806        $  3,690         $    953         $140,386

Segment profit (loss)                 $ 11,426        $  3,524        $   (792)        $(12,728)        $  1,430

Total assets                          $ 74,810        $ 11,283        $  1,021         $ 34,242         $121,356

Depreciation and amortization         $  1,880        $    107        $    134         $  1,649         $  3,770

Interest expense                      $  1,195        $    200        $     13         $    (37)        $  1,371

Capital expenditures                  $    421        $     36        $    139         $  2,584         $  3,180
                                   ================================================================================
</TABLE>


36
<PAGE>   29

                      ROY F. WESTON, INC. AND SUBSIDIARIES

Note 18 - Quarterly Financial Data (Unaudited)

Quarterly financial information for 1998 and 1997 is presented in the following
tables:

<TABLE>
<CAPTION>
                                                    ==========================================================
                                                      First          Second            Third         Fourth
(Thousands of dollars, except per share data)        Quarter         Quarter          Quarter        Quarter
- --------------------------------------------------------------------------------------------------------------
<S>                                                 <C>             <C>              <C>            <C>     
1998
Gross revenues                                      $ 54,677        $ 58,780         $ 62,416       $ 65,319
Net revenues                                        $ 32,751        $ 34,936*        $ 36,552       $ 36,147
Income (loss) from operations                       $    348        $    168         $    155       $    474**
Net income (loss)                                   $    207        $    152         $    104       $    395
Basic earnings (loss) per share                     $    .02        $    .02         $    .01       $    .04
- --------------------------------------------------------------------------------------------------------------
1997
Gross revenues                                      $ 61,480        $ 55,777         $ 60,463       $ 60,383
Net revenues                                        $ 39,618        $ 34,091         $ 36,225       $ 32,425
Income (loss) from operations                       $    417***     $ (8,100)***     $  1,460+      $ (6,993)++
Net income (loss)                                   $    396        $ (5,394)        $  1,042       $ (7,469)+++
Basic earnings (loss) per share                     $    .04        $   (.56)        $    .11       $   (.76)
                                                    ==========================================================
</TABLE>

*     Includes $800 for work performed in an earlier period resulting from a
      contract settlement.

**    Includes a reduction in estimated insurance claim liabilities of $1,000.

***   Includes restructuring credits of $1,071 in the first quarter and $597 in
      the second quarter relating to proceeds from asset sales exceeding amounts
      anticipated in recording a 1996 restructuring charge.

+     Includes a pension curtailment gain of $3,899.

++    Includes an impairment charge of $1,245 relating to unamortized financial
      and project software.

+++   Includes an income tax charge of $3,000 to provide for the uncertain
      realizability of a portion of the Company's deferred tax assets.


                                                                              37
<PAGE>   30

                      ROY F. WESTON, INC. AND SUBSIDIARIES

[LOGO] OFFICE LOCATIONS

Corporate Headquarters

Roy F. Weston, Inc.
1400 Weston Way, P.O. Box 2653  o  West Chester, PA  19380
Phone: (610) 701-3000 o Fax: (610) 701-3186  o  Website: http://www.rfweston.com

[Map of office locations]

Full-Service Office Locations

  Alabama: Auburn
  California: Concord, Sherman Oaks
  Colorado: Denver
  Connecticut: Hartford
  Georgia: Atlanta, Norcross
  Illinois: Chicago, Vernon Hills
  Maryland: Rockville
  Massachusetts: Boston
  Michigan: Detroit, Okemos
  New Hampshire: Manchester
  New Jersey: Edison
  New Mexico: Albuquerque
  New York: Carle Place, New York
  North Carolina: Raleigh
  Ohio: Miamisburg
  Oregon: Portland
* Pennsylvania: Philadelphia, West Chester
  Tennessee: Oak Ridge
  Texas: Austin, Houston, San Antonio
  Washington: Seattle
  Washington, DC

International Offices

  Weston International de Mexico, S.A. de C.V.
     (WIMSA)
  Weston Poland Sp. zo.o
  Weston International Taiwan Branch Office

PROJECT OFFICES WORLDWIDE


38
<PAGE>   31

                      ROY F. WESTON, INC. AND SUBSIDIARIES

                                                                          [LOGO]

                                                               SENIOR MANAGEMENT

William L. Robertson
Chairman of the Board and Chief Executive Officer

Patrick G. McCann
President and Chief Operating Officer

William G. Mecaughey, CPA
Vice President, Chief Financial Officer, and
Treasurer

Robert B. Biggs
Vice President and Manager, Quality Assurance/ 
Quality Control

Arnold P. Borish, Esq.
Vice President, General Counsel,
Corporate Secretary, and
Manager, Mergers and Acquisitions

John R. Brooks
Vice President and Manager,
Construction Remediation and
Redevelopment Group

John D. DiFilippo, P.E.
Vice President and Manager, Southern Division

Raymond J. Griffin
Vice President and Manager, Human Resources

John Hammond
Vice President and Manager, Eastern Division

Vincent A. Laino, Jr.
Vice President and Chief Information Officer

Thomas C. Lewis, CPA
Vice President and Manager, Knowledge Systems
and Solutions Group

Frank Monahan
Vice President and Manager, Western Division

Edmund B. Pettiss, Jr.
Vice President and Manager, Marketing

Alan Solow, CHP
Vice President and Manager, Federal Group

Kurt Stimpson
Vice President and Manager, Midwest Division

John W. Thorsen, P.E.
Vice President and Manager,
Project Management Initiative


                                                                              39
<PAGE>   32

                      ROY F. WESTON, INC. AND SUBSIDIARIES

[LOGO] BOARD OF DIRECTORS

William L. Robertson(1)
Chairman of the Board and Chief Executive 
Officer, Roy F. Weston, Inc.

Ambassador Richard L. Armitage(1)
President, Armitage Associates, L.C.

Jesse Brown(2)
President and Chief Executive Officer,
Brown and Associates

Thomas E. Carroll(1)
President and Chief Executive Officer,
MEDIQ Incorporated

Tom Harvey(1)
President, A-55, Inc.
Chairman, Global Environment and Technology 
Foundation, Global Initiatives, Inc., and
GlobeQuest International, Inc.

Wayne F. Hosking, Jr., Esq.(1)
Government Relations Director,
Roy F. Weston, Inc.

Katherine W. Swoyer(1)
Vice Chair, Roy F. Weston, Inc.

Thomas M. Swoyer, Jr.(2)
Client Service Manager, Roy F. Weston, Inc.

A. Frederick Thompson, Ph.D., P.E.(2)
Program Director, Environmental Technologies, 
National Science Foundation

Roy F. Weston, P.E., DEE (1,2)
Retired, (Chairman Emeritus), Roy F. Weston, Inc.

James H. Wolfe, CPA(2)
Retired, PricewaterhouseCoopers, LLP

- ----------
Committees:
      (1) Member, Executive Committee
      (2) Member, Audit Committee


40
<PAGE>   33

                      ROY F. WESTON, INC. AND SUBSIDIARIES

                                                                          [LOGO]

Financial Information

Analysts, investors and others seeking information about WESTON's financial
performance or copies of financial reports, including SEC Forms 10-K and 10-Q,
may contact the company. Requests should be directed to:

      William G. Mecaughey, CPA
      Chief Financial Officer & Treasurer
      Roy F. Weston, Inc.
      1400 Weston Way, P.O. Box 2653
      West Chester, Pennsylvania 19380
      Telephone: (610) 701-4556

Company Information

News media and others seeking general information about WESTON may contact:

      Corporate Marketing
      Roy F. Weston, Inc.
      1400 Weston Way, P.O. Box 2653
      West Chester, Pennsylvania 19380
      Telephone: (610) 701-3182

Company Stock Listing

WESTON's Series A common stock is traded in the Nasdaq National Market System
under the symbol "WSTNA". There is no established public trading market for the
Company's Common stock. The table displayed sets forth the range of high and low
per share sales prices for the Series A common stock as reported by the Nasdaq.

As of December 31, 1998, there were 2,394 holders of record of Series A common
stock and 26 holders of Common stock. WESTON has not paid any cash dividends
since 1978. The Board of Directors intends to retain earnings for the
foreseeable future for the expansion of WESTON's business.

                                  STOCK HISTORY
                             Series "A" Nasdaq Price

<TABLE>
<CAPTION>
                                                High                       Low
<S>                                            <C>                        <C>  
1998 
First Quarter                                  $4.25                      $2.75
Second Quarter                                 $4.38                      $3.38
Third Quarter                                  $4.31                      $2.25
Fourth Quarter                                 $3.06                      $2.25 

1997 
First Quarter                                  $4.38                      $3.50 
Second Quarter                                 $3.88                      $2.13 
Third Quarter                                  $6.38                      $2.50 
Fourth Quarter                                 $5.38                      $3.75
</TABLE>

Annual Meeting

The annual meeting of stockholders will be held on May 10, 1999, 11:00 a.m. at
WESTON headquarters:

      Roy F. Weston, Inc.
      1400 Weston Way, P.O. Box 2653
      West Chester, Pennsylvania 19380

Certified Public Accountants

      PricewaterhouseCoopers, LLP
      2400 Eleven Penn Center
      Philadelphia, Pennsylvania 19103-2962

Transfer Agent and Registrar

      American Stock Transfer and Trust Company
      40 Wall Street
      New York, New York 10005-2392

Internet Address

For up-to-date information on WESTON's service capabilities, environmental
issues and information, corporate developments and investor relations, click to
http://www.rfweston.com.


<PAGE>   1
                                                                      Exhibit 21
                          LIST OF SUBSIDIARY COMPANIES



                                                          State of Incorporation

Cardinal Indemnity Company of North America                            Vermont
Roy F. Weston (Delaware), Inc.                                         Delaware
Weston International Holdings, Inc. (d/b/a Weston International)       Delaware
Roy F. Weston of New York, Inc.                                        New York
Roy F. Weston (IPR), Inc.                                              Delaware
Moorstein, Inc.                                                        Delaware


<PAGE>   1

                                                                      Exhibit 23




                       CONSENT OF INDEPENDENT ACCOUNTANTS

We consent to the incorporation by reference in the registration statements of
Roy F. Weston, Inc. and Subsidiaries on Forms S-8 (File Nos. 33-56755 and
33-13915) of our reports dated February 4, 1999 on our audits of the
consolidated financial statements and financial statement schedule of Roy F.
Weston, Inc. and Subsidiaries as of December 31, 1998 and 1997 and for the years
ended December 31, 1998, 1997, and 1996 which reports are either included in or
incorporated by reference into this Annual Report on Form 10-K.




PricewaterhouseCoopers LLP

2400 Eleven Penn Center
Philadelphia, Pennsylvania
March 23, 1998


<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated balance sheet of December 31, 1998 and the consolidated statement
of operations for the year ended December 31, 1998 and is qualified in its
entirety by reference to such financial statements.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                           3,993
<SECURITIES>                                     1,547
<RECEIVABLES>                                   81,016<F1>
<ALLOWANCES>                                     1,882
<INVENTORY>                                          0
<CURRENT-ASSETS>                                93,402
<PP&E>                                          44,046
<DEPRECIATION>                                  34,852
<TOTAL-ASSETS>                                 121,356
<CURRENT-LIABILITIES>                           48,548
<BONDS>                                         12,997
                                0
                                          0
<COMMON>                                         1,182
<OTHER-SE>                                      55,142
<TOTAL-LIABILITY-AND-EQUITY>                   121,356
<SALES>                                              0
<TOTAL-REVENUES>                               241,192
<CGS>                                                0
<TOTAL-COSTS>                                  240,047
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                   704
<INTEREST-EXPENSE>                               1,371
<INCOME-PRETAX>                                  1,430
<INCOME-TAX>                                       572
<INCOME-CONTINUING>                                858
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                       858
<EPS-PRIMARY>                                      .09
<EPS-DILUTED>                                      .09
<FN>
<F1>Includes 20,540 of unbilled costs and estimated earnings thereon.
</FN>
        

</TABLE>


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