MOBLEY ENVIRONMENTAL SERVICES INC
DEF 14C, 1997-05-09
HAZARDOUS WASTE MANAGEMENT
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<PAGE>
                            SCHEDULE 14C INFORMATION
 
               Information Statement Pursuant to Section 14(c) of
             the Securities Exchange Act of 1934 (Amendment No.   )
 
    Check the appropriate box:
    / /  Preliminary Information Statement
    / /  Confidential, for Use of the Commission Only (as permitted by Rule
         14c-5(d)(2))
    /X/  Definitive Information Statement
 
                            MOBLEY ENVIRONMENTAL SERVICES, INC.
- --------------------------------------------------------------------------------
                (Name of Registrant As Specified In Its Charter)
 
Payment of Filing Fee (Check the appropriate box):
 
/X/  No fee required
/ /  Fee computed on table below per Exchange Act Rules 14c-5(g) and 0-11
     (1) Title of each class of securities to which transaction applies:
        ------------------------------------------------------------------------
     (2) Aggregate number of securities to which transaction applies:
        ------------------------------------------------------------------------
     (3) Per unit price or other underlying value of transaction computed
        pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
        filing fee is calculated and state how it was determined):
        ------------------------------------------------------------------------
     (4) Proposed maximum aggregate value of transaction:
        ------------------------------------------------------------------------
     (5) Total fee paid:
        ------------------------------------------------------------------------
 
/ /  Fee paid previously with preliminary materials.
 
/ /  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2) and identify the filing for which the offsetting fee was paid
     previously. Identify the previous filing by registration statement number,
     or the Form or Schedule and the date of its filing.
 
     (1) Amount Previously Paid:
        ------------------------------------------------------------------------
     (2) Form, Schedule or Registration Statement No.:
        ------------------------------------------------------------------------
     (3) Filing Party:
        ------------------------------------------------------------------------
     (4) Date Filed:
        ------------------------------------------------------------------------
<PAGE>
                             INFORMATION STATEMENT
 
                                    MAY 9, 1997
                               TO SHAREHOLDERS OF
                      MOBLEY ENVIRONMENTAL SERVICES, INC.
 
                          RELATING TO THE PENDING SALE
               OF ITS HYDROCARBON RECYCLING AND RECOVERY BUSINESS
 
    This Information Statement relates to the sale by Mobley Environmental
Services, Inc. (the "Company") of substantially all of the operating assets of
the Company (the "Assets"), which Assets constitute its hydrocarbon recycling
and recovery business (the "Business"). This Information Statement was first
mailed or delivered to shareholders on or about May 9, 1997.
 
    On October 9, 1996, the Board of Directors of the Company approved in
general terms the sale of the Assets to United States Filter Corporation ("U.S.
Filter"). On April 25, 1997, the Company executed a definitive Asset Purchase
Agreement with U.S. Filter (the "Agreement"). The Company anticipates that the
sale as contemplated by the Agreement (the "Transaction"), will be completed by
May 31, 1997.
 
    The Transaction has been approved by shareholders of the Company holding at
least a majority of the votes represented by the outstanding common stock of the
Company, which shareholder approval was obtained by written consents in lieu of
a shareholder's meeting pursuant to Section 228 of the Delaware General
Corporation Law. Accordingly, the Transaction will not be submitted to the
shareholders of the Company for a vote. This Information Statement is being
furnished to shareholders solely to provide them with certain information
concerning the Transaction in accordance with the requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act") and the regulations
promulgated thereunder, including particularly Regulation 14C, and Section 228
of the Delaware General Corporation Law.
 
    In the event that the Transaction is not consummated, the Board of Directors
of the Company may seek opportunities to sell some or all of the Assets to
another purchaser pursuant to the general authority granted it. However, the
Company's inability to consummate the sale of the Assets to U.S. Filter or
another prospective purchaser in a timely manner could have a material adverse
effect on the Company's consolidated financial position and liquidity. Final
closing of the Transaction will be publicly announced by the Company, and
updated information, if any, concerning the Transaction will be provided in a
Form 8-K to be filed by the Company after closing of the Transaction and in the
Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange
Commission next following consummation of the Transaction.
 
                         WE ARE NOT ASKING YOU FOR A PROXY
                 AND YOU ARE REQUESTED NOT TO SEND US A PROXY.
 
    NO PERSON HAS BEEN AUTHORIZED BY THE COMPANY OR U.S. FILTER TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
INFORMATION STATEMENT IN CONNECTION WITH THE TRANSACTION DESCRIBED HEREIN AND,
IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION SHOULD NOT BE RELIED UPON
AS HAVING BEEN AUTHORIZED. NEITHER THE DELIVERY OF THIS INFORMATION STATEMENT
NOR THE CLOSING OF THE TRANSACTION DESCRIBED HEREIN SHALL IMPLY THAT THERE HAS
BEEN NO CHANGE IN THE INFORMATION SET FORTH HEREIN OR IN THE AFFAIRS OF THE
COMPANY OR U.S. FILTER SINCE THE DATE HEREOF.
<PAGE>
                               TABLE OF CONTENTS
 
                             INFORMATION STATEMENT
                               TO SHAREHOLDERS OF
                      MOBLEY ENVIRONMENTAL SERVICES, INC.
 
<TABLE>
<CAPTION>
                                                                                                             PAGE
                                                                                                          ----------
<S>                                                                                                       <C>
Available Information...................................................................................           1
 
Incorporation of Certain Documents by Reference.........................................................           1
 
Summary.................................................................................................           2
 
Sale of the Assets......................................................................................           4
  Background of the Transaction.........................................................................           4
  Reasons for the Transaction; Board Deliberations......................................................           7
  Terms of the Agreement & Related Matters..............................................................           8
  Fairness Opinion of Financial Advisors................................................................          11
  Use of Proceeds of Transaction........................................................................          13
  Future Plans of the Company...........................................................................          14
 
Disposition of Oilfield Services Business...............................................................          15
Voting and Beneficial Interests.........................................................................          16
  Interest of Certain Persons in Matters to be Acted Upon...............................................          16
  Voting Securities of the Company......................................................................          16
  Security Ownership of Certain Beneficial Owners and Management........................................          16
 
Information with Respect to Registrant..................................................................          19
  Description of Business...............................................................................          19
  Description of Properties.............................................................................          27
  Legal Proceedings.....................................................................................          28
  Market Information....................................................................................          30
  Management's Discussion and Analysis of Financial Condition and Results of Operations.................          30
 
Information with Respect to U.S. Filter.................................................................          38
 
Financial Matters.......................................................................................          39
  Consolidated Financial Statements.....................................................................          39
  Historical and Pro Forma Selected Financial Data......................................................          39
  Unaudited Pro Forma Condensed Consolidated Financial Information......................................          39
  Accounting Treatment of the Transaction...............................................................          39
  Federal Income Tax Consequences.......................................................................          40
 
Appraisal Rights........................................................................................          40
 
Consolidated Financial Statements for the Year Ended December 31, 1996..................................         F-1
 
Historical and Pro Forma Selected Financial Data and Unaudited Pro Forma Consolidated Condensed
  Financial Statements..................................................................................         S-1
 
Fairness Opinion of Rauscher Pierce Refsnes, Inc........................................................     Annex A
</TABLE>
<PAGE>
                             AVAILABLE INFORMATION
 
    The Company and U.S. Filter are both subject to the informational reporting
requirements of the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), and in accordance therewith each files reports, proxy statements and
other information with the U.S. Securities and Exchange Commission (the "SEC" or
"Commission"). The reports, proxy statements and other information filed by the
Company or U.S. Filter with the Commission can be inspected and copied at the
public reference facilities maintained by the Commission at Judiciary Plaza,
Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549, and at the regional
offices of the Commission, Seven World Trade Center, New York, New York 10048,
and Northwestern Atrium Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60621. The common stock of U.S. Filter is listed on the New York Stock
Exchange. Reports, proxy statements and other information concerning U.S. Filter
can also be inspected and copied at the New York Stock Exchange at 20 Broad
Street, New York, New York 10005.
 
    The Commission maintains a Web site that contains reports, proxy and
information statements and other information regarding registrants that file
electronically with the Commission, including the Company and U.S. Filter. The
address for such Web site is "http://www.sec.gov".
 
    The term "Company" when used herein shall mean Mobley Environmental
Services, Inc. and its subsidiaries and affiliates through which it conducts
business, unless the context indicates otherwise.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
    The following documents filed by U.S. Filter with the Commission (File No.
1-10728) pursuant to the Exchange Act are incorporated herein by reference: U.S.
Filter's Annual Report on Form 10-K for the year ended March 31, 1996; U.S.
Filter's Quarterly Reports on Form 10-Q for the quarters ended June 30, 1996,
September 30, 1996 and December 31, 1996; U.S. Filter's Current Reports on Form
8-K dated May 31, 1996 (as amended on Form 8-K/A dated June 28, 1996), June 10,
1996, June 27, 1996, July 15, 1996 (two such Current Reports), August 23, 1996,
September 6, 1996, October 28, 1996, November 6, 1996, December 2, 1996 and
January 6, 1997; and the description of the U.S. Filter common stock in U.S.
Filter's Registration Statement on Form 8-A, as the same may be amended.
 
    All reports and other documents filed by U.S. Filter pursuant to Section
13(a), 13(c), 14 and 15(d) of the Exchange Act after the date of this
Information Statement and prior to the closing of the transaction which is the
subject of this Information Statement shall be deemed to be incorporated by
reference herein from the dates of filing of such documents or reports. Any
statement contained herein or in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Information Statement to the extent that a statement
contained herein or in any other subsequently filed document which also is
incorporated or deemed to be incorporated by reference herein modifies or
supersedes such statement. Any such statement so modified or superseded shall
not be deemed, except as modified or superseded, to constitute a part of this
Information Statement.
 
    U.S. Filter will provide without charge to each person to whom a copy of
this Information Statement is delivered, upon the written or oral request of
such person, a copy of any or all of the documents that are incorporated herein
by reference, other than exhibits to such information (unless such exhibits are
specifically incorporated by reference into such documents). Requests should be
directed to the Vice President, General Counsel and Corporate Secretary of
United States Filter Corporation at 40-004 Cook Street, Palm Desert, California
92211 (telephone (619) 340-0098).
 
                                       1
<PAGE>
                                    SUMMARY
 
    This Information Statement relates to the sale by Mobley Environmental
Services, Inc. and its wholly-owned subsidiaries (the "Company") of
substantially all of the operating assets of the Company (the "Assets"), which
Assets constitute its hydrocarbon recycling and recovery business (the
"Business").
 
    Since December 1994, when the Company exited the hazardous waste services
business by completing the sale of its subsidiary, Gibralter Chemical Resources,
Inc., the Company has developed and executed a strategic plan for the growth of
its hydrocarbon recycling and recovery business. To date, development of this
business has included acquisition of existing businesses in the industry, as
well as construction and operation of new facilities for the production of
distillate fuels from used motor oil and the recycling of oil filters,
absorbents and related materials.
 
    In October 1995, the Company engaged Cureton & Co., Inc., an investment
banking and business advisory firm, to assist it in the investigation and
possible financing of other business combination opportunities that had come to
the Company's attention during the course of its strategic planning, industry
analysis, and due diligence. Through the process of investigating a variety of
business combination opportunities, and the financing thereof, United States
Filter Corporation ("U.S. Filter") emerged as the most viable party interested
in pursuing a specific transaction with the Company. However, U.S. Filter was
not interested in joint ownership and would only proceed with negotiations with
the Company on the basis of purchasing, with U.S. Filter common stock as
consideration, the Company's entire interest in its hydrocarbon recycling and
recovery business.
 
    On October 9, 1996, the Board of Directors of the Company approved, in
general terms, the sale of the Assets to U.S. Filter. On April 25, 1997, the
Company executed a definitive asset purchase agreement with U.S. Filter (the
"Agreement"). The Company anticipates that the sale, as contemplated by the
Agreement (the "Transaction"), will be completed by May 31, 1997.
 
    Under the terms of the Agreement, the Company will sell to U.S. Filter
substantially all of the Assets used to conduct the Business in exchange for
newly issued shares of common stock, $.01 par value per share, of U.S. Filter
(the "U.S. Filter Stock") registered pursuant to U.S. Filter's shelf
Registration Statement on Form S-4 with an aggregate exchange value of $8.0
million, subject to adjustment, plus the right to receive additional shares of
U.S. Filter Stock (with an aggregate exchange value of up to $4.0 million) upon
the attainment by the Business of certain financial performance goals in the
two-year period following the closing of the Transaction. Completion of the
Transaction is subject to the specific terms and conditions of the Agreement,
including various conditions to closing which are described herein.
 
    Presently, it is contemplated that all or substantially all of the $8.0
million in U.S. Filter Stock received at the closing of the Transaction will be
sold by the Company as soon as possible following such closing, resulting in
anticipated net proceeds totaling approximately $5,800,000 after repayment of
the Company's bank indebtedness (approximately $1,750,000) and transaction
expenses estimated at $450,000. Such net proceeds will be used to fund the
liabilities retained by the Company following the sale, and the remaining
surplus cash is expected to be invested in relatively low-risk, liquid
investments. The Company does not intend to distribute any of the shares of U.S.
Filter Stock to its shareholders, nor does it have any current plans to
distribute the proceeds thereof to its shareholders. Because of outstanding
contractual indemnification obligations of the Company and in light of pending
litigation to which the Company is a party, the Company will remain in existence
for the foreseeable future but will have no operating assets after the
Transaction. As circumstances change or additional information with respect to
the extent of the Company's potential indemnity obligations becomes available,
the Board of Directors will continue to evaluate various uses of the Company's
funds. While the Company may investigate new business opportunities that arise,
the nature and probability of any investments which might result from such
investigations cannot be determined.
 
                                       2
<PAGE>
    The entire Board of Directors of the Company (with the director having an
interest in the Transaction abstaining) has determined that the Transaction is
advisable and in the best interests of, and fair to, the Company and its
shareholders, and has approved the Transaction and the Agreement. In reaching
its determination, the directors considered a number of factors which are
described herein. In addition, the Company has obtained a written opinion from
Rauscher Pierce Refsnes, Inc., an independent investment banking firm, that as
of February 10, 1997, the consideration to be received by the Company pursuant
to the Agreement was fair to the Company's shareholders from a financial point
of view.
 
    The Transaction has been approved by the shareholders of the Company holding
60.6% of the votes represented by the outstanding Common Stock of the Company,
which shareholder approval was obtained by written consent in lieu of a
shareholder's meeting pursuant to Section 228 of the Delaware General
Corporation Law. Accordingly, the Transaction will not be submitted to the
shareholders of the Company for a vote. Under the Delaware General Corporation
Law, no appraisal rights are available to shareholders of the Company in
connection with the Transaction.
 
                                       3
<PAGE>
                               SALE OF THE ASSETS
 
BACKGROUND OF THE TRANSACTION
 
    In December 1994, the Company exited the hazardous waste services industry
by completing the sale of Gibraltar Chemical Resources, Inc. ("Gibraltar"), a
wholly-owned subsidiary, to American Ecology Corporation. In anticipation of
that sale, the Company sought to develop a strategic business plan to maintain
and enhance its financial position upon the divestiture of Gibraltar, and to
achieve long-term profitability for the Company in the face of changing
conditions in the waste management services industry. Through this planning
process, management identified significant market opportunities in the business
of non-hazardous hydrocarbon recycling and recovery. The Company's Board of
Directors and management believed that its core skills in managing liquid
hydrocarbon wastes, combined with its experience in processing industrial oily
wastes, formed a solid foundation for a business expansion into more advanced
hydrocarbon recycling and recovery technologies. The strategic plan developed by
the Company contemplated growth through process enhancement projects, as well as
through the acquisition of complementary existing business operations.
 
    In particular, through its strategic review process, the Company developed a
business plan that included (i) acquisitions of small used oil collection
operations in geographic areas where the Company was already active in the oily
waste business; (ii) installation of a distillate fuels production facility at
the Company's Baytown, Texas processing complex to manufacture value-added
products from recovered hydrocarbon waste streams; (iii) installation of a
filter recycling plant at its Baytown facility for the recycling of used oil
filters, absorbents and related materials; (iv) aggressive marketing of the
Company's new services to its existing industrial customer base; and (v)
exploration of new geographic and service markets for further expansion.
Management also believed that it would become increasingly important for the
Company to develop the skills and capabilities necessary to provide on-site
treatment services to its larger industrial clients in light of industry trends
toward waste minimization and recycle/recovery.
 
    As an initial step in the implementation of this plan, the Company
identified the used motor and industrial oils, filter, and antifreeze collection
and recycling businesses as a promising expansion opportunity for its existing
non-hazardous high water-content hydrocarbon recycling and recovery business, by
providing used oil and oil filter feedstock for the manufacture of value-added
finished products at facilities to be constructed in Baytown, Texas. Based on
the studies and analysis conducted by management, it determined that much of the
used oil and oil filter collection was currently performed by small operators
characterized by limited capital resources who lacked the enhanced processing
capabilities to add value to the products collected. Accordingly, the Company
pursued and eventually completed the acquisition of certain assets of a group of
three related recycling companies in July 1995. Simultaneously, the Company
continued its due diligence on the industry in general, its targeted business
markets, and the specific distillate fuels production and filter recycling
facilities most feasible for accomplishment of the Company's objectives. To
assist in this process, the Company engaged several consultants to provide
needed information regarding capital costs, relevant industry data, price
relationships, and general project economics. Management's market research and
industry analysis culminated in specific plans for the engineering and
construction of a distillate fuels production facility and oil filter recycling
facility.
 
    Engineering of the two new processing facilities began in April 1995;
however, permitting issues and contractor delays pushed commencement of
construction to the third quarter of that year. Construction of the filter
recycling facility was completed by the end of the 1996 first quarter and the
plant began operations in April of that year. The distillate fuels production
facility began its mechanical checkout and startup process during the 1996
second quarter; however, as a result of various technical and operational
issues, an extended testing and evaluation period delayed full-scale operation
of the plant until August, 1996.
 
    In October 1995, the Company engaged Cureton and Co., Incorporated ("Cureton
& Co."), an investment banking and business advisory firm, to assist it with the
investigation and possible financing of
 
                                       4
<PAGE>
other business combination opportunities that had come to the Company's
attention during the course of its strategic planning, industry analysis, and
due diligence. With the assistance of Cureton & Co., the Company investigated
possible relationships or affiliations with a variety of entities whose
operations might be a feasible expansion of, or complementary to, the Company's
existing operations or those contemplated under its strategic plan. Of the
discussions undertaken by management, PORI International, Inc. ("PORI"), based
in Baltimore, Maryland, emerged as a candidate for serious consideration due to
its longstanding reputation in the treatment of oily wastes on customers' sites,
its historic development of oil/ water separations technologies, and its
established presence as a consolidator of used oil from collectors in the Middle
Atlantic region of the United States. On March 11, 1996, the Company's
discussions with PORI culminated in a letter of intent to acquire substantially
all of PORI's assets and assume certain of its liabilities with completion of
the transaction subject to, among other things, the Company's ability to secure
the necessary financing.
 
    Although initial inquiries indicated financial institutions to be a
potential source of financing, it also became evident that significant equity
infusions would be required to complete the PORI acquisition and to otherwise
carry out the Company's overall expansion plans. In an effort to secure equity
financing, the Company prepared a detailed business plan that described the
opportunities for growth and the plan for the development of the business,
including financial projections. In addition to the acquisition of PORI, the
plan contemplated several follow-on business acquisitions in targeted geographic
regions, the expansion of its used oil and filter collection capabilities, and
the construction of new facilities for oil/water processing, distillate fuels
production, and oil filter recycling. Financing necessary to effectuate the
entire plan was estimated to require approximately $34.5 million in excess of
internally-generated funds over a three-year period.
 
    The Company incurred operating losses during the 1996 first and second
quarters of $672,000, or $0.08 per share, and $492,000, or $0.06 per share,
respectively. Such disappointing financial results reflected the impact of an
extended regional drought which severely impaired fluid volumes, revenues, and
the related profitability of the Company's oil/water separations business. In
addition to the effect of the drought conditions, this core business was also
impacted by the ongoing decline of fluids associated with underground storage
tank remediation activities. While such event-driven volumes were partially
offset by an increase in production-oriented oily wastes, the change in business
mix toward more difficult-to-treat waste streams resulted in diminished profit
margins. Additionally, competitive pressures in the Company's oilfield services
business, along with an unfavorable shift in business mix favoring a higher
proportion of lower-margin contract services revenue, reduced the profit
contribution from this segment during the fourth quarter of 1995 and first
quarter of 1996. Further, because of the startup nature of its used oil and
filter collection and recycling activities, compounded by delays in bringing the
new processing facilities on-line, these new business lines made virtually no
contribution to operating profit during this period. The operating losses
sustained by the Company, coupled with the aggressive capital spending program
associated with the execution of its growth strategy, significantly weakened the
Company's liquidity over the first half of 1996. By the end of the 1996 second
quarter, the Company had a working capital deficit of approximately $4.8
million, including $4.4 million in outstanding bank indebtedness which was
classified as a current liability as a result of violations of certain
restrictive covenants in its bank credit agreement. The Company's cash resources
had been reduced from $1.5 million at year-end 1995 to $516,000 at June 30,
1996, and it had exhausted substantially all of its available borrowing
capacity.
 
    As a result of the Company's deteriorated financial condition and
unfavorable results of operations, bank debt financing had effectively been
eliminated as a viable source of funds for the continued execution of its
strategic plan. Through Cureton & Co., the Company contacted over 30 venture
capitalists, private investors, and industry participants during the ensuing
months of the summer of 1996 to discuss the possibilities of a private
investment in the Company or other strategic alliance. Of those contacted,
approximately 27 asked to review the Company's business plan, many of whom
indicated interest in further investigation. Senior management was interviewed
by several potential investors, and six potential investor
 
                                       5
<PAGE>
groups toured the Company's Baytown facility to further discuss possible
relationships or investment structures. Through these discussions, it became
evident to management that more serious negotiations with most potential
investors were thwarted by one or more issues facing the Company, including the
risks associated with the unproven nature of the Company's distillate fuels
production facility, and the perceived litigation exposure arising from the
Company's former ownership of Gibraltar. (See "INFORMATION WITH RESPECT TO
REGISTRANT--Legal Proceedings--Claims and Legal Proceedings Against Gibraltar").
 
    Through this exhaustive process, U.S. Filter emerged as the most viable
party interested in pursuing a specific transaction with the Company. After
lengthy discussions, it became clear that U.S. Filter was not interested in
joint ownership and would only proceed with negotiations on the basis of
purchasing, with registered shares of U.S. Filter common stock as consideration,
the Company's entire interest in its hydrocarbon recycling and oil/water
processing business.
 
    In light of the Company's severely weakened financial condition and given
U.S. Filter's stated interest in acquiring the Company's hydrocarbon recycling
and recovery business, the Board of Directors reviewed the challenges facing the
Company and discussed in general terms the alternatives available to address
them. The Board and management noted that the hydrocarbon recycling and recovery
industry is currently highly fragmented, but characterized by increasing
consolidation, intensifying competition, and continued growth through
acquisition by larger entities with greater access to financial resources than
that of the Company. Among other things, the Board of Directors discussed (i)
the Company's relatively small size and the resultant constraints on its ability
to make significant investments in additional processing or collection
businesses without an infusion of equity; (ii) the Company's inability to obtain
bank financing and the unfavorable results of recent efforts to attract equity
investors to fund activities contemplated by the Company's strategic business
plan; (iii) the Company's default under its bank credit agreement due to its
inability to maintain compliance with certain covenants contained in such
agreement; and (iv) the Company's severely strained liquidity and immediate need
for working capital to continue its current operations. As part of these
deliberations, management and Cureton & Co. reviewed in detail with the Board of
Directors the contacts that had been made with third parties regarding possible
investments in, or strategic alliances with, the Company. Since such efforts had
not yielded access to funds on terms acceptable to the Company, discussions were
then focused on the possible acquisition of the Company's hydrocarbon recycling
and recovery business by U.S. Filter as offering the best prospects for the
Company and its shareholders. In conjunction with this decision, the Company
abandoned its plans to acquire the assets of PORI; such assets were subsequently
acquired by U.S. Filter.
 
    Discussions and negotiations with U.S. Filter continued through September
1996 and during this period management and Cureton & Co. continued to respond to
inquiries from other parties who had expressed an initial interest in a possible
investment in the Company; however, none of these inquiries resulted in a formal
offer. On October 9, 1996, the Company's Board of Directors met and reviewed
with management and Cureton & Co. the status of such negotiations. Based on the
progress of those discussions, and the terms of the outstanding offer from U.S.
Filter, the Company's Board authorized the Company to enter into a letter of
intent with U.S. Filter pursuant to which the Company would sell to U.S. Filter
the net assets of the Company's hydrocarbon recycling and recovery business in
consideration for U.S. Filter common stock having an aggregate exchange value of
$8.0 million, plus the right to receive additional shares of U.S. Filter common
stock with an exchange value of up to $4.0 million upon the attainment of
certain financial performance goals in the two-year period following the sale of
the net assets to U.S. Filter (the "Transaction"). Because the Transaction
contemplated an offer of employment to Mr. Stark and a success fee paid to Mr.
Cureton's firm, both Mr. Stark and Mr. Cureton abstained from votes on these
matters. Additionally, as it is anticipated that Mr. Stark may become an
employee of U.S. Filter upon consummation of the Transaction, in order to avoid
any potential conflict of interest which might result from such situation, Mr.
Stark resigned his position as director of the Company effective November 8,
1996. The Company executed a letter of intent with U.S. Filter on October 30,
1996, and
 
                                       6
<PAGE>
thereafter, U.S. Filter continued its due diligence business review of the
Company. Senior management of the Company, assisted by Cureton & Co. and legal
counsel, and U.S. Filter then began negotiating the terms of a definitive asset
purchase agreement. Matters negotiated during this time included the terms of
the consideration to be received by the Company, including among others,
finalization of the formula pursuant to which the number of shares of U.S.
Filter common stock issuable to the Company would be determined, the specific
terms regarding the contingent U.S. Filter common stock that may be earned by
the Company, the nature and scope of representations and warranties to be given
by the Company to U.S. Filter, the extent of indemnifications to be given by
each party to the other party, and specific conditions precedent to closing of
the Transaction. The negotiations between the Company and U.S. Filter continued
through April 16, 1997 and resulted in approval by the Company's Board of
Directors of a definitive Asset Purchase Agreement (the "Agreement") on that
date, subject to subsequent modifications as may be deemed appropriate by the
Company's executive officers, financial advisors, and legal counsel. Such
Agreement was executed on April 25, 1997.
 
    Notwithstanding the positive negotiations between the Company and U.S.
Filter concerning a sale of the Company's hydrocarbon recycling and recovery
business, U.S. Filter was not interested in an investment in the Company's
oilfield services business. Accordingly, the proposed transaction with U.S.
Filter necessitated the separation of the net assets of the Company's
hydrocarbon recycling and recovery business, both operationally and financially,
from the assets used to conduct the Company's oilfield services business. The
assets of the oilfield services business were ultimately sold by the Company to
another party on January 20, 1997. (See "DISPOSITION OF OILFIELD SERVICES
BUSINESS").
 
REASONS FOR THE TRANSACTION; BOARD DELIBERATIONS
 
    THE ENTIRE BOARD OF DIRECTORS OF THE COMPANY (WITH THE DIRECTOR HAVING AN
INTEREST IN THE TRANSACTION ABSTAINING) HAS DETERMINED THAT THE TRANSACTION IS
ADVISABLE AND IN THE BEST INTERESTS OF, AND FAIR TO, THE COMPANY AND ITS
SHAREHOLDERS, AND HAS APPROVED THE TRANSACTION AND THE AGREEMENT.
 
    In reaching its determination that the Transaction is in the best interests
of the Company and its shareholders, the directors considered a number of
factors, including without limitation, the following, each of which the Board of
Directors believed in general supported approval of the Transaction:
 
        (a) the written opinion of Rauscher Pierce Refsnes, Inc. ("RPR"), an
    independent investment banking firm, that, as of February 10, 1997,
    determined that the consideration to be received by the Company pursuant to
    the Agreement was fair to the Company's shareholders from a financial point
    of view (see "--Fairness Opinion of Financial Advisor");
 
        (b) information relating to the financial condition, results of
    operations, capital levels, cash flow, business and prospects of the
    Company. In this regard, the Company's Board of Directors noted particularly
    the sizable operating losses sustained by the Company in recent quarters,
    the resultant negative impact of such losses on its liquidity (as evidenced
    by a working capital deficit of $4.8 million at June 30, 1996), the
    Company's technical default under its bank credit agreement and lack of
    additional borrowing capacity, and its expected future cash requirements.
    Additionally, the Board considered the extensive efforts of management and
    Cureton & Co. to attempt to attract equity investors and strategic partners
    over an extended period of time throughout 1996;
 
        (c) the likelihood that the Transaction would be consummated, based upon
    the experience, reputation and financial capabilities of U.S. Filter,
    including its established track record of successfully completing and
    integrating acquisitions;
 
        (d) the relationship of the total consideration to be received for the
    assets to be sold pursuant to the offer from U.S. Filter (including an
    assessment of the likelihood of the ultimate realization of the contingent
    consideration that may be earned by the Company) to the returns expected to
    be received by the Company through a strategy of continuing operations, with
    particular consideration given to
 
                                       7
<PAGE>
    the near-term cash flow demands and risks associated with the Company's
    current operations (see also "--Fairness Opinion of Financial Advisor");
 
        (e) information relating to the financial condition, results of
    operations, business and prospects of U.S. Filter; specifically, the Board
    of Directors believed that U.S. Filter had the financial capacity and
    wherewithal to consummate the Transaction, and that its stock and earnings
    performance would continue to support the valuation of the shares of U.S.
    Filter Stock to be received as consideration;
 
        (f) the current operating environment, including without limitation, the
    continued consolidation and increasing competition in the waste management
    services business, the prospects for further changes in the industry and the
    importance of being able to capitalize on developing opportunities in the
    industry;
 
        (g) the relatively high administrative costs of continuing to operate
    the Company at its current size; and
 
        (h) the U.S. Filter common stock to be received by the Company in the
    Transaction was considered to be tantamount to cash in all material
    respects, as it is believed that it can be sold quickly and efficiently into
    a liquid and relatively stable market.
 
    The foregoing discussion of the information and factors discussed by the
Company's Board of Directors is not meant to be exhaustive but is believed to
include all primary factors considered by the Board. The Board of Directors did
not quantify or attach any particular weight to the various factors that it
considered in reaching its determination that the Transaction is in the best
interests of the Company and its shareholders.
 
TERMS OF THE AGREEMENT & RELATED MATTERS
 
    CONSIDERATION FOR SALE.  Under the Agreement, the Company will sell to U.S.
Filter substantially all of the assets, more specifically described below (the
"Assets"), used to conduct its hydrocarbon recycling and recovery business (the
"Business") in exchange for newly issued shares of common stock, $.01 par value
per share, of U.S. Filter (registered by U.S. Filter with the SEC pursuant to a
shelf Registration Statement on Form S-4) with an aggregate exchange value of
$8.0 million (the "U.S. Filter Stock"), subject to adjustment (the "Purchase
Price"), plus the right to receive additional shares of U.S. Filter Stock (with
an aggregate exchange value of up to $4.0 million) upon the attainment of
certain financial performance goals in the two-year period following the closing
of the Transaction. The Purchase Price will be adjusted upward or downward in
the event that the total pro forma stockholder's equity increases or decreases
by more than $500,000 from the June 30, 1996 estimate of $15,086,000 to the date
of closing of the Transaction. Such amount was determined based on the book
values of the assets expected to be conveyed to U.S. Filter, and the estimated
liabilities which would be assumed by U.S. Filter, assuming the Transaction was
consummated effective June 30, 1996. Such liabilities excluded the Company's
outstanding bank indebtedness. In the event total stockholder's equity increases
or decreases by less than $500,000 from June 30, 1996 to the closing date, no
adjustment will be made to the Purchase Price. In the event total stockholder's
equity increases or decreases by more than $500,000 from June 30, 1996 to the
closing date, then the Purchase Price will be proportionately adjusted up or
down, respectively, to the extent such stockholder's equity increases or
decreases by more than $500,000. Total pro forma stockholder's equity at March
31, 1997 amounted to approximately $15,039,000. Consequently, had the
Transaction been effectuated as of that date, no adjustment to the purchase
price would have been required. The total pro forma stockholder's equity as
defined in the Agreement is based on certain agreed-upon accounting conventions
and specifically excludes approximately $6.7 million in asset impairment
write-downs recorded by the Company during the 1996 third quarter, as required
by generally accepted accounting principles. The parties agreed to exclude such
write-downs from the determination of total pro forma stockholder's equity since
they were recorded based on the estimated net realizable volume of the assets as
determined primarily by the terms of the Agreement. Notwithstanding the
foregoing, the ultimate value realized from the sale of the
 
                                       8
<PAGE>
U.S. Filter Stock received as consideration by the Company may vary depending on
market fluctuation of the USF Average Share Value (as defined below), and its
actual sales prices at the time of the sale of such shares.
 
    EARNOUT SHARES.  Under the Agreement, the Company may be entitled to receive
additional shares of U.S. Filter Stock (the "Earnout Shares") based upon the net
operating earnings generated by the Business during the two-year period
following the Transaction. The aggregate maximum exchange value of the Earnout
Shares will be $4.0 million. The obligation of U.S. Filter to issue Earnout
Shares shall be determined as follows: (i) in the event that the Business
generates net operating income (as defined) equal to or less than $500,000 in
either or both of the two twelve-month periods following the closing of the
Transaction, then no Earnout Shares shall be issuable to the Company with
respect to such year; (ii) in the event that the Business has net operating
income greater than $500,000 but less than or equal to $1,600,000 for the first
fiscal year following the Transaction, then the Company shall be entitled to
receive Earnout Shares with a maximum exchange value of $4.0 million, ratably
determined based on the amount in excess of $500,000 but less than $1,600,000;
(iii) in the event that the Business has net operating income equal to or
greater than $1,600,000 for the first fiscal year following the Transaction, the
Company will be entitled to receive Earnout Shares with an exchange value equal
to $4.0 million and there will be no further Earnout Shares available for
issuance to the Company; (iv) in the event that the Business has net operating
earnings during the second fiscal year following the closing of the Transaction,
in excess of the greater of $500,000 or the net operating income of the Business
for the first fiscal year following the Transaction (the "Second Year Base
Amount"), but less than or equal to $2.0 million, then the Company shall be
entitled to receive Earnout Shares in an amount equal to a maximum exchange
value of $4.0 million (less any amounts paid for the first fiscal year following
the Transaction), ratably determined based on the amount in excess of the Second
Year Base Amount but less than $2.0 million; and (v) in the event that the
Business has net operating income equal to or greater than $2.0 million for the
second fiscal year following the Transaction and no Earnout Shares were issued
for the first fiscal year following the Transaction, the Company will be
entitled to receive Earnout Shares with an exchange value of $4.0 million.
 
    DETERMINATION OF NUMBER OF SHARES OF U.S. FILTER STOCK.  The number of
shares of U.S. Filter Stock to be issued to the Company pursuant to the
preceding two paragraphs shall be determined by dividing the applicable amount
by the USF Average Share Value. "USF Average Share Value" shall be the average
closing price for the U.S. Filter Stock as reported by the New York Stock
Exchange for the twenty (20) consecutive trading days ending on the sixth
trading day immediately preceding the date of closing of the Transaction (except
that the date of determination of the earnout shall be used in place of the
Transaction closing date in determining USF Average Share Value for purposes of
issuance of Earnout Shares). By way of example, the following information sets
forth the number of shares of U.S. Filter Stock issuable in connection with the
Transaction had it been effectuated on April 15, 1997:
 
<TABLE>
<CAPTION>
       "ASSUMED"                                           SHARES OF
        DATE OF                 USF AVERAGE            U.S. FILTER STOCK
        CLOSING                 SHARE VALUE                 ISSUABLE
- ------------------------  ------------------------  ------------------------
<S>                       <C>                       <C>
     April 15, 1997              $32.44375                  246,580
</TABLE>
 
    ESCROW.  Ten percent (10%) of the shares of U.S. Filter Stock (as determined
by the formula described in the preceding paragraph) shall be deposited in and
such shares (or their equivalent exchange value will be) maintained in escrow
pursuant to an escrow agreement for a period of one year from the closing of the
Transaction to satisfy the indemnification obligations of the Company under the
Agreement.
 
    ASSETS TO BE CONVEYED TO U.S. FILTER.  The Assets to be conveyed to U.S.
Filter include (i) the Company's three facilities (located in Baytown, Kilgore,
and Corsicana, Texas) for processing and recycling certain materials managed as
non-hazardous oily wastes, off-specification motor fuels, and underground
storage tank remediation fluids; (ii) the distillate fuels production facility
in Baytown; (iii) the filter recycling
 
                                       9
<PAGE>
facility in Baytown; (iv) the Company's terminal and office facilities in or
near Baytown, Austin, San Antonio, Dallas, and Kilgore, Texas; Little Rock,
Arkansas; and Baton Rouge, Louisiana; (v) tangible personal property, including
vehicles, machinery, equipment, spare parts and supplies, inventories, office
furniture, equipment and supplies, computer software and hardware, and leasehold
improvements; (vi) rights under leases or contracts; and (vii) accounts
receivable, intellectual property, and various other assets incidental to the
operation of the Business, excluding cash and cash equivalents.
 
    U.S. FILTER'S ASSUMPTION OF LIABILITIES.  Under an Assumption Agreement to
be executed at the closing of the Transaction, U.S. Filter will assume certain
liabilities of the Company which are: (i) properly recorded and accrued on the
books of the Company using accounting principles and methodologies consistently
applied and mutually acceptable to U.S. Filter and the Company, (ii) incurred in
the ordinary course of business, and (iii) otherwise described in the Assumption
Agreement. Such liabilities will consist primarily of accounts payable and
accrued expenses but will not include any of the Company's outstanding bank
indebtedness.
 
    COVENANT NOT TO COMPETE.  Pursuant to the terms of the Agreement, for a
period of five years following the closing of the Transaction, the Company shall
not, directly or indirectly, own, manage, operate or control any business that
competes with the activities of the Business in the geographic areas in which
the Business currently operates.
 
    REPRESENTATIONS AND WARRANTIES.  Generally, the representations and
warranties of the Company in the Agreement relate to: (i) the organization and
good standing of the Company and its subsidiaries and authority to conduct the
operations of the Business; (ii) the authority of the Company and its
subsidiaries to execute, and the enforceability of, the Agreement and documents
contemplated thereunder against the Company and its subsidiaries, and the
noncontravention of the Agreement with any agreement, law, or organizational
document of the Company or its subsidiaries; (iii) the financial statements of
the Company and the absence of undisclosed liabilities; (iv) the assets,
liabilities and operations of the Business and the Company; (v) absence of
litigation effecting the Transaction; (vi) agreements or contracts with third
parties and affiliates; (vii) regulatory matters and compliance with laws;
(viii) consents and approvals required in connection with the Agreement; (ix)
tax matters; (x) labor relations and employee benefits of employees of the
Business and the Company; and (xi) environmental matters regarding the Business.
Generally, representations and warranties of U.S. Filter relate to: (i) U.S.
Filter corporate organization and good standing; (ii) the authority of U.S.
Filter to execute, and the enforceability of, the Agreement and documents
contemplated thereunder against U.S. Filter, and noncontravention of the
Agreement with its charter documents or applicable laws; (iii) the absence of
litigation; (iv) capitalization of U.S. Filter; and (v) the accuracy of
information provided for use in this Information Statement regarding U.S.
Filter.
 
    COVENANTS AND OBLIGATIONS.  From and after the date of the Agreement until
the closing of the Transaction, the Company is required to: (i) conduct the
Business in the ordinary course and consistent with past practice; (ii) keep its
business, properties, and business relationships substantially intact; (iii) not
make any distribution with respect to its capital stock, organize any subsidiary
or acquire any equity ownership in any business, cancel any right to dispose of
any assets, except in the ordinary course of business, make any capital
expenditures or commitments therefor in excess of $100,000 (in the aggregate),
enter into any contracts the performance of which may extend beyond the closing
of the Transaction, enter into employment or consulting arrangements not
terminable at will without penalty, fail to pay liabilities when due, take any
action that is reasonably likely to result in the occurrence of any of the
foregoing matters, or take any action or omit to take any action that will cause
a breach or termination of any permit or contract of the Company; (iv) provide
U.S. Filter access to its employees and records; and (v) not make public
announcements with respect to the agreement without the written consent of U.S.
Filter.
 
    CONDITIONS TO CLOSING.  The obligation of U.S. Filter to consummate the
Transaction is subject to the satisfaction or waiver of the following
conditions: (i) the accuracy in all material respects of the representations and
warranties of the Company set forth in the Agreement; (ii) the absence of any
matter which
 
                                       10
<PAGE>
would restrain or prohibit the Agreement or Transaction or that would adversely
affect U.S. Filter's ownership of the Assets or assumption of the assumed
liabilities; (iii) the absence of any material adverse change in the Assets,
assumed liabilities, or other aspects of the Business; (iv) the delivery of
certain documents, certificates, and legal opinions of the Company and its
subsidiaries; (v) acceptance by substantially all of the Company's employees of
employment with U.S. Filter; (vi) requisite shareholder approval of the
Transaction by shareholders of the Company, and (vii) the receipt of all
necessary and appropriate governmental and third party consents and approvals.
 
    The obligation of the Company to consummate the Transaction is subject to
the satisfaction or waiver of the following conditions: (i) the accuracy in all
material respects of the representations and warranties of U.S. Filter set forth
in the Agreement; (ii) the absence of any action or proceeding which would have
the effect of prohibiting the Agreement or the Transaction; (iii) delivery of
certain documents, certificates, and legal opinions of U.S. Filter; and (iv)
listing of the U.S. Filter Stock on the New York Stock Exchange.
 
    TERMINATION.  The Agreement may be terminated and abandoned at any time
prior to closing of the Transaction by the mutual consent of the Company and
U.S. Filter. The Agreement may be terminated and the Transaction abandoned by
the Company or U.S. Filter if such party's conditions to closing have not been
satisfied in full or waived by May 31, 1997. In the event of termination of the
Agreement by the Company or U.S. Filter pursuant to the preceding sentence, the
Company and U.S. Filter shall be liable to the other party for any breach
thereof by such party, which breach led to such termination.
 
    INDEMNIFICATION.  The Company has agreed to indemnify, defend, and hold
harmless U.S. Filter from and against any damages arising out of (i) a breach of
any representation or warranty made by the Company in the Agreement; (ii) a
breach or nonfulfillment of any covenant or agreement made by the Company in the
Agreement or any document executed by the Company in consummating the
Transaction; and (iii) any liability of the Company not assumed by U.S. Filter
under the Agreement. Provided, however, the Company shall have no obligation to
indemnify U.S. Filter unless the aggregate amount of damages to U.S. Filter
exceeds $100,000. Except in the cause of fraud or intentional misrepresentation,
the indemnification obligations of the Company expire five years after the
closing of the Transaction, and the maximum liability of the Company under such
indemnification provisions is $4,000,000.
 
FAIRNESS OPINION OF FINANCIAL ADVISORS
 
    RPR, as part of its investment banking business, is continually engaged in
the valuation of businesses and their securities in connection with mergers and
acquisitions, negotiated underwritings, secondary distributions of listed and
unlisted securities, private placements, and valuations for estate, corporate
and other purposes. The Board of Directors of the Company selected RPR as its
financial advisor because RPR is a recognized investment banking firm with
emphasis in the waste management services industry and regularly engages in the
valuation of businesses and their securities in connection with mergers and
acquisitions.
 
    In arriving at its opinion as to the fairness of the consideration to be
received by the Company in connection with the Transaction, RPR considered a
wide variety of factors that might have been considered by an actual buyer of
the Company's hydrocarbon recycling and recovery business. In its analyses, RPR
considered numerous assumptions with respect to industry performance, general
business and economic conditions, and other matters, many of which are beyond
the Company's control.
 
    In connection with its opinion, RPR reviewed certain internal financial
information concerning the Company and its waste management segment and certain
publicly available information regarding U.S. Filter. RPR also held discussions
with members of senior management of the Company regarding the business and
prospects of the segment. In addition, RPR (i) compared certain financial
information for the Company and the segment with similar information for
selected companies within the environmental industry whose securities are
publicly traded, (ii) reviewed the financial terms of certain recent business
 
                                       11
<PAGE>
combinations which were deemed comparable in part, and (iii) performed such
other studies and analyses and considered such other factors as were deemed
appropriate. RPR also reviewed the proposal letter with U.S. Filter and the
draft Agreement.
 
    RPR did not independently verify the information described above and for
purposes of its opinion assumed the accuracy, completeness and fairness thereof.
With respect to information relating to the prospects of the segment, RPR
assumed that such information reflects the best currently available estimates
and judgments of management of the Company as to the likely future financial
performance of the segment. In addition, RPR did not make an independent
evaluation or appraisal of the assets of the segment, nor was RPR furnished with
any such evaluation or appraisal. RPR's opinion is based on market, economic and
other conditions as they existed and could be evaluated as of the date of their
opinion.
 
    The following is a summary of the analysis conducted by RPR as a basis for
its fairness opinion as presented by RPR to the Company's Board of Directors.
This summary does not purport to be a complete description of the analyses
performed by RPR or the presentation to the Board of Directors in this regard,
but does provide an overview of all the material analyses conducted by RPR. RPR
believes that its analyses must be considered as a whole and that selecting
portions of its analyses and factors considered, without considering all factors
and analyses, could create an incomplete view of the processes underlying its
opinion. The preparation of a fairness opinion is a complex process and not
necessarily susceptible to partial analyses or summary description.
 
    REVIEW OF RECENT AND PROJECTED FINANCIAL PERFORMANCE OF COMPANY'S WASTE
MANAGEMENT SEGMENT. RPR reviewed the historical performance of the Company's
waste management segment for the three years ended December 31, 1995, the three
quarters ended on each of September 30, 1996 and September 30, 1995, and the
twelve months ended December 31, 1996. RPR noted that historical earnings of
this segment have been low, and that during 1996 monthly operating earnings in
this segment ranged from a loss of $265,000 to earnings of $32,000, with losses
in 10 of 12 months and an operating loss for the entire year 1996 of
approximately $1,618,000.
 
    RPR noted that, largely due to the startup nature of two new business lines,
historical earnings of this segment have been relatively low in comparison to
earnings that are expected in 1997, 1998 and subsequent years. Consequently, in
RPR's opinion, the fair market value of the Assets being acquired by U.S. Filter
depends primarily upon the expected future earnings of this segment. The Company
provided estimates to RPR of most likely projected earnings before interest,
taxes, depreciation and amortization ("EBITDA") in the fiscal year ending March
31, 1998 of approximately $4.0 million and for the fiscal year ending March 31,
1999 of approximately $5.2 million. RPR noted that these expected earnings would
result in the Company receiving the maximum total proceeds of $12.0 million in
U.S. Filter Stock (including Earnout Shares with an exchange value of $4.0
million). RPR noted that a $12.0 million purchase price would be 20.9 times
estimated EBITDA for calendar year 1996, and 2.6 times the average projected
EBITDA for the most likely expected earnings in fiscal years 1998 and 1999 for
this segment. RPR noted that the 2.6x ratio appears to be fair in this case
because the 1998 and 1999 estimated earnings are highly uncertain and are an
unusually large improvement over 1995 and 1996 results.
 
    In addition, RPR reviewed the principal terms of the earnout and concluded
that, based on current expectations of the business unit's performance by
management, it is likely that the earnout will be achieved. If, on the other
hand, the earnout targets are not met, such lack of earnings will most likely
indicate that the assets were not worth the additional earnout provision, which
would indicate that the $8.0 million price was fair to the Company.
 
    REVIEW OF PROJECTED CASH FLOWS.  RPR reviewed the present value of future
cash flow projections discounted at pre-tax rates of 25% to 35%. The analysis
indicated a present value range of $11.3-$15.2 million using the Company's
"optimistic case" cash flow projections that did not include negative cash flows
for capital expenditures or working capital needs. The "optimistic case" was the
only set of projections furnished to RPR that covered more than one future year.
RPR developed a lower, "most likely," case that
 
                                       12
<PAGE>
indicated a present value range of $9.1-$12.1 million. In addition, RPR noted
that a typical buyer would expect a typical seller to present his operation in a
favorable manner. Therefore, a typical buyer may revise a seller's financial
projections downward.
 
    COMPARISON WITH SELECTED PUBLICLY TRADED COMPANIES.  RPR reviewed selected
financial data of seven publicly traded environmental companies. RPR noted that
these companies traded at a market value ratio of 3.1 to 15.3 times historical
(trailing 12 months) EBITDA. However, because none of these companies conducts a
line of business similar to the Company's waste management services segment, RPR
did not consider any of the public companies to be comparable to the Company's
waste management services segment.
 
    ANALYSIS OF SELECTED MERGERS AND ACQUISITIONS.  RPR reviewed seven recent
environmental acquisitions including those of Sanifill Inc., Continental Waste
Industries, Davis Water & Waste Industries, Western Waste Industries, Inc.,
Earth Tech. Corp. USA, Greiner Engineering Inc., and Rust International, Inc.
and noted that the ratio of "enterprise value" for the trailing 12 months to
EBITDA ranged from 7.3x to 12.2x. The purchase price of the Company's waste
management services segment was 9.2 times 1995 EBITDA and 20.9 times 1996
estimated EBITDA. However, RPR did not consider the seven acquisitions to be
comparable to the Transaction as none of the acquired assets were similar to the
types of assets being sold by the Company.
 
    REVIEW OF U.S. FILTER.  RPR also reviewed the price of U.S. Filter common
stock and concluded that the price in recent periods (ranging back 180 days)
appeared to represent a normal and reliable "fair market value" for that
security. RPR reviewed U.S. Filter's Annual Reports on Form 10-K and its Annual
Reports to Shareholders for the two fiscal years ending March 31, 1996 and 1995,
U.S. Filter's Quarterly Report on Form 10-Q and its Second Quarter Shareholder
Report dated September 30, 1996, and a series of articles and analyst reports on
U.S. Filter. In addition, RPR reviewed select financial data on 13 publicly
traded water-related companies.
 
    OTHER FACTORS.  RPR noted several other factors in their review including:
(a) the fact that the Company was unsuccessful in its initial effort to raise
capital in a private placement in which more than 30 potential investors were
contacted (for various reasons including concern about litigation from the
Company's prior hazardous waste business and the uncertainty of future earnings
from new operations involving used oil and used oil filters); (b) the Company
received an indication of interest in purchasing the assets from another
possible buyer that was under U.S. Filter's bid (and also subject to an
earnout); and (c) that the Company's management was not aware of any party who
would likely be willing to purchase the assets at a price above U.S. Filter's
offer.
 
    The full text of the written opinion of RPR dated February 10, 1997, which
sets forth assumptions made, factors considered and limitations on the review
undertaken by RPR is included as Annex A to this Information Statement.
 
USE OF PROCEEDS OF TRANSACTION
 
    The shares of U.S. Filter Stock representing the Purchase Price (and any
Earnout Shares) will be issued by U.S. Filter pursuant to a shelf Registration
Statement on Form S-4 filed with the Commission by U.S. Filter, and the public
reoffer and resale of such shares by the Company has also been registered
pursuant to a prospectus supplement to such Form S-4 to be filed immediately
after closing of the Transaction. Presently, it is contemplated that all or
substantially all of the $8.0 million in U.S. Filter Stock received at the time
of the closing of the Transaction will be sold by the Company as soon as
possible following such closing. After retirement of the Company's remaining
outstanding bank indebtedness and related accrued interest (totaling
approximately $1,750,000) and transaction expenses (estimated at $450,000), the
Company anticipates the Transaction will result in net proceeds of approximately
$5,800,000. These net proceeds will be available for the payment of certain
liabilities retained by the
 
                                       13
<PAGE>
Company following the sale, including accounts payable and accrued expenses not
directly related to the Business and accrued salaries, wages and related costs.
The remaining surplus cash, estimated at approximately $4,500,000, is expected
to be invested in relatively low-risk, liquid investments. Such amount assumes
the immediate payment of the current liabilities retained by the Company;
however, certain of these liabilities are expected to be funded in the months
following the Transaction, and consequently the surplus cash initially available
for investment may exceed this amount.
 
    In addition to the aforementioned proceeds, under the terms of the
Agreement, the Company may receive up to $4.0 million in U.S. Filter Stock
during the two-year period following the Transaction based on the financial
performance of the Business. (See "--Terms of the Agreement & Related Matters--
Earnout Shares"). It is currently contemplated that all or substantially all of
the Earnout Shares, if any, received by the Company will be sold as soon as
possible following receipt of such shares and that the net proceeds from such
sale will be invested in relatively low-risk, liquid investments.
 
    The amounts described herein are approximate and based on the Company's
current estimates, including the current market price of the U.S. Filter Stock.
Furthermore, there can be no assurance that such amounts will actually be
realized.
 
FUTURE PLANS OF THE COMPANY
 
    Because of its indemnity obligations related to the sale of its former
subsidiary, Gibraltar Chemical Resources, Inc., as well as indemnification
responsibilities with respect to the Transaction and the recent asset sale of
the Company's oilfield services business (see "DISPOSITION OF OILFIELD SERVICES
BUSINESS"), and considering the extent of ongoing litigation (see "INFORMATION
WITH RESPECT TO REGISTRANT--Legal Proceedings" and Note 13 of Notes to
Consolidated Financial Statements), the Company will remain in existence for the
foreseeable future, but will have no operating assets after the Transaction.
 
    The extensive litigation involving the Company is in varying stages, with
some cases in the early phases of discovery, while others are awaiting trial.
The claims are unliquidated; and the Company's potential liability, even after
considering potential recoveries from available insurance coverage, could exceed
the amount of its assets. Accordingly, based on consultation with legal counsel
(including the law firms of Brown McCarroll & Oaks Hartline and Bracewell &
Patterson, L.L.P.), the Company's Board of Directors believes that they are
required by applicable law to hold the Company's assets as a fiduciary for
potential creditors as well as the stockholders. No steps will be taken to
reduce the corporate corpus of the Company by paying liquidating or other
dividends to shareholders until these claims are resolved or more nearly
quantified. In light of the nature and complexity of the litigation, the Company
expects that it may take a period of up to several years to resolve these
matters.
 
    As circumstances change or additional information with respect to the
Company's potential indemnity obligations and litigation exposure becomes
available, the Board of Directors will continue to evaluate various uses of the
Company's funds. While the Company may investigate new business opportunities
that arise, the nature and probability of any investments which might result
from such investigations cannot be determined.
 
    The Company anticipates that its ongoing general and administrative expenses
will be reduced to approximately $300,000 annually upon completion of the
Transaction, and expects earnings from investments to largely offset such costs.
The Company currently plans to engage a Controller through a staff leasing
company to assist in the management of its ongoing accounting and administrative
matters at an approximate annual cost of $50,000. None of the Company's current
officers will remain employees after the Transaction is completed. Such amounts
are approximate based on current estimates and actual amounts could differ from
those estimates.
 
                                       14
<PAGE>
                   DISPOSITION OF OILFIELD SERVICES BUSINESS
 
    In light of its decision to sell the Assets, the Company's Board of
Directors evaluated the remainder of the Company's assets and business
activities, including its oilfield services business. Such business constituted
approximately 20.3% of the Company's consolidated revenues for the year ended
December 31, 1996 and approximately 16.1% of the Company's consolidated assets
at December 31, 1996. Given the relatively high administrative costs of
operating a business as small as the oilfield services business on a stand-alone
basis, and the rather limited growth opportunities available to the Company for
this business (either internally or through acquisition), the Board of Directors
concluded that a sale of the oilfield services business was in the best interest
of the Company. The Company, with the assistance of Cureton & Co., prepared a
memorandum describing this segment of the Company's business, including its
assets, key personnel and historical and anticipated pro forma operating
results. The memorandum was distributed to numerous potentially interested
parties, and an offer by Dawson Production Services, Inc. ("Dawson") to acquire
the oilfield services business was deemed to be superior to the expressions of
interest by other parties. Dawson's offer was deemed superior to the other
expressions of interest received given its recent experience in completing
similar acquisitions, its industry reputation and base of existing operations in
the Company's general market area, as well as its financial capabilities. Five
other parties expressed an interest in receiving the descriptive memorandum,
resulting in one other offer to purchase the assets which was substantially
below that of Dawson. On November 1, 1996, the Company executed a letter of
intent with Dawson to sell substantially all of its oilfield services assets.
The Company determined that the value received for the oilfield services assets
was fair to and in the best interests of the Company and its shareholders. This
determination was made in part based upon a written fairness opinion from RPR
dated January 9, 1997. Because the oilfield services assets were being sold by a
wholly-owned subsidiary of the Company, approval by the shareholders of Mobley
Environmental Services, Inc. was not required under applicable corporate law or
otherwise required under the terms of the subject agreement. The sale was
completed on January 20, 1997 pursuant to a definitive asset purchase agreement,
and resulted in the Company receiving approximately $4.9 million in cash and a
subordinated note for $500,000, due in January 2002. The Company used the cash
proceeds to reduce its outstanding bank indebtedness by $3.3 million, with the
remainder being used to fund transaction expenses of approximately $255,000 and
for working capital purposes (see Note 2 of Notes to Consolidated Financial
Statements).
 
                                       15
<PAGE>
                        VOTING AND BENEFICIAL INTERESTS
 
INTEREST OF CERTAIN PERSONS IN MATTERS TO BE ACTED UPON
 
    The Company has engaged Cureton & Co., an entity in which Stewart Cureton,
Jr. has an ownership and management interest, to provide certain business
consulting services to the Company, including analysis and negotiation of
potential business combination transactions to which the Company might be a
party. Mr. Cureton is a Class A director. Under the terms of the engagement, the
Company has paid Cureton & Co. retainer fees of $162,000 through December 31,
1996, and would be obligated to pay additional fees in the event a transaction
is consummated by the Company. Based on the terms of the Agreement, the Company
will be obligated to pay Cureton & Co. a total of approximately $220,000, plus
out-of-pocket expenses, in conjunction with the Transaction. In addition, the
Company paid Cureton & Co. a fee of approximately $207,500, plus out-of-pocket
expenses, in connection with U.S. Filter's acquisition of PORI, which was
completed on February 28, 1997. Under the terms of the Agreement, U.S. Filter
reimbursed the Company $250,000 for expenses associated with its due diligence
investigations of PORI, including amounts due to Cureton & Co. Additionally, in
connection with the disposition of its oilfield services business described
previously, the Company paid Cureton & Co. approximately $150,000, plus out-
of-pocket expenses. A portion of the retainer fees referred to previously are
partially creditable toward the various transaction fees. The Company believes
that the terms of its arrangements with Cureton & Co. are consistent with
industry standards for similar services.
 
    It is anticipated that Michael M. Stark, the Company's President and Chief
Executive Officer, and W. Christopher Chisholm, the Company's Chief Financial
Officer and a Vice President, will become employees of U.S. Filter upon
completion of the Transaction. Prior to November 8, 1996, Mr. Stark was also a
director of the Company; however, to avoid any possible conflict of interest
which might have resulted from his potential future employment with U.S. Filter,
he resigned his director position with the Company effective that date.
 
    Additionally, although certain directors of the Company may also be
substantial shareholders of the Company, their interests in the Transaction are
no different than that of any other shareholder of the Company. No member of
U.S. Filter's Board of Directors is a director or officer of the Company or an
associate of any officer or director of the Company. Neither the Company nor any
of its affiliates has any relationships with U.S. Filter.
 
VOTING SECURITIES OF THE COMPANY
 
    As of April 29, 1997, the date on which holders of a majority of the
Company's outstanding stock approved the Transaction by written consent, there
were outstanding 4,155,097 shares of Class A Common Stock, $.01 par value
("Class A Stock") and 4,680,196 shares of Class B Common Stock, $.01 par value
("Class B Stock"). For purposes of approving the Transaction, the Class A Stock
and Class B Stock vote together as a single class. Each share of Class A Stock
is entitled to one vote and each share of Class B Stock is entitled to ten votes
on all matters submitted to a vote of the shareholders, except for the election
of directors. To be entitled to give written consent of approval of the
Transaction, a shareholder must have been a shareholder of record as of April
29, 1997.
 
    As of April 29, 1997, the Company had received written consents approving
the Transaction from shareholders representing 30,902,480 votes (out of a total
of 50,957,057 votes) or 60.6% of the votes represented by the Company's
outstanding common stock.
 
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
    The following table sets forth, as of April 15, 1997, the shares of Class A
and Class B Stock beneficially owned by (i) each person known to the Company to
be the beneficial owner of more than five percent of the issued and outstanding
shares of the Company's Class A or Class B Stock, (ii) each director, (iii) the
Company's Chief Executive Officer and (iv) the directors and executive officers
as a group. This information is based on public filings made with the Securities
and Exchange Commission through
 
                                       16
<PAGE>
November 1996, and certain information supplied to the Company by the persons
listed below. The persons named below, having overall voting power of 87.1%,
have sole voting and investment power with respect to all shares owned, unless
otherwise noted.
 
<TABLE>
<CAPTION>
                                                                  CLASS A STOCK(1)               CLASS B STOCK(1)
                                                             ---------------------------  ------------------------------
                                                                            PERCENT OF                      PERCENT OF
NAME OF BENEFICIAL OWNER(2)                                  SHARES(3)(4)    CLASS(5)         SHARES           CLASS
- -----------------------------------------------------------  ------------  -------------  ---------------  -------------
<S>                                                          <C>           <C>            <C>              <C>
John Mobley................................................     38,600(6)        *            864,780(7)         18.5%
Lois Ann Mobley............................................       --            --            253,550(8)          5.4%
James A. Mobley(9).........................................       --            --            558,629            11.9%
Steven M. Mobley(9)........................................       --            --            558,629            11.9%
H. David Hughes, Trustee...................................       --            --            365,786(10)         7.8%
T.M. Mobley................................................       --            --          1,108,210(11)        23.7%
Jo Ann Mobley Grooms.......................................       --            --            324,671(12)         6.9%
Susan Mobley Matthews......................................       --            --            235,471(13)         5.0%
David Mobley...............................................       --            --            515,163(14)        11.0%
Robert G. Schleier, Trustee................................       --            --            691,527(15)        14.8%
Michael M. Stark(16).......................................    296,200           6.80%          --              --
Stewart Cureton, Jr........................................     10,000           *              --              --
Antar & Co.(17)............................................    470,809           10.8%          --              --
Directors and Executive Officers as a Group (5 persons)....    464,564           10.6%      1,972,990            42.1%
</TABLE>
 
- ------------------------
 
*   Less than 1%
 
(1) Each share of Class B Stock is convertible into Class A Stock on a
    share-for-share basis at any time. The information set forth for Class A
    Stock does not include the shares of Class B Stock which are convertible
    into Class A Stock.
 
(2) Addresses of beneficial owners are as follows: John Mobley and Lois Ann
    Mobley, Stillhouse Canyon Office Park, Building One, 4807 Spicewood Springs
    Road, Suite 1245, Austin, Texas; James A. Mobley, 919 Hillcrest Dr.,
    Longview, Texas; Steven M. Mobley, 816 Congress Ave., Suite 1100, Austin,
    Texas; H. David Hughes, 111 Congress Avenue, Suite 1400, Austin, Texas; T.M.
    Mobley, Michael M. Stark, Stewart Cureton, Jr., 4415 E. Greenwood, Baytown,
    Texas; Jo Ann Mobley Grooms, 1880 Bent Tree, Tyler, Texas; Susan Mobley
    Matthews, HCR 68, Box 23A, Hondo, Texas; David Mobley, 1909 N. Longview
    Street, Kilgore, Texas; Robert G. Schleier, 1100 Stone Road, Suite 101,
    Kilgore, Texas; and Antar & Co., 600 Jefferson #850, Houston, Texas.
 
(3) Includes 190,200 shares for Mr. Stark; 10,000 shares for Mr. Cureton; and
    219,964 shares for Directors and Executive Officers as a Group which may be
    acquired within 60 days of April 15, 1997, pursuant to options granted to
    such persons by the Company.
 
(4) Includes 100,000 shares for Mr. Stark and 200,000 shares for Directors and
    Executive Officers as a Group which were granted pursuant to the 1995
    Employee Restricted Stock Plan. Such shares vest over a five year period
    beginning January 1, 1995, and vesting may be accelerated upon the
    attainment of certain specified increases in the market price of the Class A
    Stock.
 
(5) Percentages are calculated on 4,375,061 shares, the number of shares that
    would be outstanding if the stock options described in Footnote (3) were
    exercised.
 
(6) Includes a pro-rata portion of the shares of Class A Stock owned by a
    corporation which is owned 40% by John Mobley; Mr. Mobley shares voting and
    investment power for shares owned by such corporation.
 
(7) Includes 253,550 shares held by a family trust for which Mr. Mobley's
    spouse, Lois Ann Mobley, is co-trustee; Mr. Mobley has no pecuniary interest
    in such shares.
 
                                       17
<PAGE>
(8) Represents shares held as co-trustee for a trust; Mrs. Mobley shares voting
    and investment power for such shares with H. David Hughes.
 
(9) The number of shares listed for each of James A. Mobley and Steven M. Mobley
    includes 290,600 shares owned by trusts for which they serve as trustees.
 
(10) Represents shares held as co-trustee for two trusts (see Footnotes (8) and
    (11)). Although Mr. Hughes shares voting and investment power for such
    shares, he has no pecuniary interest in the shares.
 
(11) Includes 112,236 shares held as co-trustee for a trust; although Mr. Mobley
    shares voting and investment power with H. David Hughes for shares owned by
    such trust, he has no pecuniary interest in those shares.
 
(12) Includes 296,671 shares owned by trusts for which Mrs. Grooms is sole
    trustee. Also includes 28,000 shares owned of record by Mrs. Grooms' spouse;
    Mrs. Grooms disclaims beneficial ownership for such shares.
 
(13) Includes 207,471 shares owned by trusts for which Mrs. Matthews is sole
    trustee. Also includes 28,000 shares owned of record by Mrs. Matthews'
    spouse; Mrs. Matthews disclaims beneficial ownership for such shares.
 
(14) Represents shares held as trustee or co-trustee for trusts. Mr. Mobley
    shares voting and investment power for 512,739 of the shares.
 
(15) Represents shares held as trustee or co-trustee for four trusts; Mr.
    Schleier shares voting and investment power with David Mobley for 511,527 of
    these shares. However, Mr. Schleier has no pecuniary interest in any of the
    shares he beneficially owns.
 
(16) It is anticipated that Mr. Stark will become an employee of U.S. Filter
    upon completion of the Transaction. In order to avoid any possible conflict
    of interest which might result from such situation, Mr. Stark resigned his
    position as director with the Company effective November 8, 1996; he
    continues to serve as the Company's President and Chief Executive Officer.
 
(17) Neither Antar & Co. nor any person claiming through Antar & Co. has filed a
    Schedule 13D with the Securities and Exchange Commission. Based on the
    absence of such filing, the Company has assumed that no beneficial owner of
    the shares registered in the name of Antar & Co. owns 5% or more of the
    Company's Class A Stock.
 
                                       18
<PAGE>
                     INFORMATION WITH RESPECT TO REGISTRANT
 
DESCRIPTION OF BUSINESS
 
GENERAL
 
    Mobley Environmental Services, Inc. (the "Company") provides diverse
environmental and field-related services to industrial, governmental and
commercial markets, and specializes in the collection, transportation,
treatment, recycling, and management of a wide variety of non-hazardous liquid
hydrocarbons, oil filters, absorbents, and related materials. Prior to January
20, 1997, as discussed below, the Company also provided oilfield services,
including transporting, marketing, storing, and disposing of various liquid
materials used or produced as waste throughout the lifecycle of oil and gas
wells.
 
    The Company was formed in July 1991 for the purpose of combining the
businesses of Gibraltar Chemical Resources, Inc. ("Gibraltar"), Mobley Company,
Inc. ("Mobley Co."), and Mobley Group, Inc. which had been under common
management since their inception. Shareholders of the predecessor companies
received shares of the Company's Class B Common Stock in exchange for their
shares of common stock of these companies, and certain of the principal
shareholders of the Company sold to the Company for cash certain assets used in
the business of the predecessor companies. As a result of the foregoing
transactions, Gibraltar and Mobley Co. became wholly-owned subsidiaries of the
Company and Mobley Group, Inc. was merged into the Company.
 
    The Company's oilfield services business was founded in 1943, primarily for
the recycling of tank bottoms, an oilfield waste material which was processed
and used to make specialty polishes and waxes. Based on the experience of
certain of the Company's principal shareholders in establishing and operating
several businesses managing chemicals and liquid and solid wastes, including the
operation of oilfield salt water disposal wells, in 1980 the Company expanded
into the hazardous waste treatment and disposal business through its Gibraltar
subsidiary with the construction of a deep well and related facilities.
Additional facilities for waste-derived fuels blending and solvent recycling
were constructed at the Gibraltar site in Winona, Texas in 1986 and 1987 and a
second deep well was completed in 1991. As discussed below and in Note 3 of
Notes to Consolidated Financial Statements the Company completed the sale of
Gibraltar on December 31, 1994. Consequently, the Company is no longer involved
in the commercial management of hazardous wastes.
 
    In 1987, the Company expanded its waste management services activities to
include the collection and treatment of non-hazardous, hydrocarbon-laden wastes
for customers outside the oil and gas industry and opened its initial oily waste
treatment facility in Kilgore, Texas. Subsequently, in 1991 and 1993, additional
treatment facilities for the processing of non-hazardous hydrocarbon-laden
fluids commenced operations in Corsicana, Texas and Baytown, Texas,
respectively. These treatment and recycling plants are supported by a network of
seven transportation terminals and transfer facilities in Texas, Arkansas, and
Louisiana. In 1995, the Company broadened its hydrocarbon recycling and recovery
activities to include the collection and marketing of used oil and oil filter
collection and recycling through the acquisition of the assets of a group of
three related recycling companies. Additionally, construction of two new
facilities for the recycling of used motor oil and fuel mixtures into
higher-value finished products for sale and the processing and recycling of used
oil filters, absorbents and related materials was completed during 1996. On
October 30, 1996 and April   , 1997, respectively, the Company executed a letter
of intent and definitive asset acquisition agreement with U.S. Filter for the
sale of its hydrocarbon recycling and recovery assets. The transaction is
expected to be consummated by May 31, 1997. See Note 2 of Notes to Consolidated
Financial Statements and "INFORMATION WITH RESPECT TO REGISTRANT-- Management's
Discussion and Analysis of Financial Condition and Results of Operations".
 
    On January 20, 1997, the Company completed the sale of the assets used in
its oilfield services business to Dawson Production Services, Inc. (see Note 2
of Notes to Consolidated Financial Statements, "INFORMATION WITH RESPECT TO
REGISTRANT--Management's Discussion and Analysis of
 
                                       19
<PAGE>
Financial Condition and Results of Operations" and "DISPOSITION OF OILFIELD
SERVICES BUSINESS").
 
RESTRUCTURING AND DIVESTITURE OF HAZARDOUS WASTE OPERATIONS
 
    In late 1993, management developed and began implementation of a
restructuring plan for Gibraltar. Such restructuring was precipitated by a
general decline in the hazardous waste services industry during 1992 and 1993 as
a result of an increasingly competitive and changing market, trends toward
recycling/ recovery and waste minimization by industrial waste generators, as
well as the effects of a recessionary economy. In addition, Gibraltar was
negatively impacted by a series of regulatory and legal issues. After a period
of continued operating losses, in light of management's ongoing assessment of
changed conditions in the hazardous waste market, and considering the
significance of Gibraltar's regulatory issues and future capital requirements,
in late 1993, the Company's senior management and Board of Directors determined
that the divestiture of its hazardous waste business was in the best interests
of the Company and its shareholders. On May 10, 1994 the Company entered into a
definitive agreement (the "Stock Purchase Agreement") for the sale of all of the
outstanding shares of common stock of Gibraltar to American Ecology Corporation
("AEC"). The sale of Gibraltar was completed effective December 31, 1994. See
Note 3 of Notes to Consolidated Financial Statements for additional information
regarding the Gibraltar sale and its effects on the Company's consolidated
financial statements.
 
    The Company made extensive warranties and representations in the Stock
Purchase Agreement, including the absence of any liabilities arising prior to
closing other than those disclosed to AEC. The Company is required to indemnify
AEC for all losses resulting from breaches of warranties and representations and
pending or future claims or proceedings resulting from circumstances existing
prior to closing through June 30, 1996 (or in the case of tax, environmental and
ERISA claims, through June 30, 1998). The maximum liability of the Company under
such indemnity with respect to undisclosed claims is $3.0 million; there is no
limit with respect to disclosed liabilities. See Note 13 of Notes to
Consolidated Financial Statements for further information regarding certain
obligations and contingent liabilities relating to Gibraltar.
 
    The Company had also formed a joint venture called Pro Ambiente, S.A. de
C.V. ("Pro Ambiente"), with Cemex, S.A. de C.V. ("Cemex") in March of 1993 to
collect organic hazardous wastes and blend hazardous waste fuels for certain
cement kilns operated by Cemex in Mexico. After the divestiture of Gibraltar and
the Company's decision to focus on its non-hazardous hydrocarbon recycling
business, as well as economic uncertainties in Mexico, the Company sold its
interest in the joint venture to Cemex in July 1995. See Note 5 of Notes to
Consolidated Financial Statements.
 
BUSINESS STRATEGY AND EXPANSION ACTIVITIES
 
    Having exited the hazardous waste industry with the year-end 1994 sale of
Gibraltar and the mid-1995 divestiture of its interest in Pro Ambiente, the
Company's focus has been on the continued growth and development of its
non-hazardous hydrocarbon recycling and recovery business. This new strategic
direction, unveiled in 1994, included leveraging the Company's existing customer
base through the addition of new services for these customers, expanding
geographically, entering new and complementary markets through selected
acquisitions, adding new processing capabilities at its existing facilities, and
transferring certain oily waste separation and processing technologies to client
sites.
 
    During 1995 and 1996, the Company continued its hydrocarbon recycling market
expansion efforts. Specifically:
 
    - In March 1995, the Company opened a new transfer terminal in Baton Rouge,
      Louisiana to service the south Louisiana and Mississippi markets.
 
                                       20
<PAGE>
    - In July 1995, the Company acquired the assets of a group of three related
      Texas and Louisiana-based recycling companies engaged in the collection
      and marketing of used oils and collection and recycling of oil filters,
      and has integrated these operations into its existing network of
      collection and transfer terminals.
 
    - In the 1995 third quarter, the Company began construction of two new
      processing plants at its Baytown, Texas site. These new facilities
      included a distillate fuels production facility for the manufacture of
      value-added finished products from used oil and motor-fuel feedstocks, and
      a filter processing and recycling facility for the recycling of used oil
      filters, absorbents and related materials. The new plants were completed
      and began operations during 1996.
 
    - In March 1996, the Company announced a letter of intent for the
      acquisition of PORI International, Inc., a Baltimore, Maryland-based
      environmental consulting and services company that designs, builds,
      maintains and operates on-site wastewater treatment, waste minimization,
      and oil recycling facilities. Plans for the Company's acquisition of PORI
      were subsequently dropped as a result of its decision to sell
      substantially all of its operating assets; however, U.S. Filter completed
      the acquisition of PORI's assets effective February 28, 1997 pursuant to a
      definitive acquisition agreement.
 
    The hydrocarbon recycling and recovery industry--particularly the oil and
filter recycling markets--is undergoing fundamental change. Currently, these
markets are highly fragmented, consisting primarily of many small companies and
relatively few major firms. The Company believes that continued regulatory
scrutiny and a growing awareness of the benefits of proper recycling practices
will continue to stimulate industry-wide consolidation, and it sees a growing
need for waste minimization and on-site services. These factors are expected to
reinforce the demand for hydrocarbon recycling and recovery firms with multiple
capabilities.
 
    The Company's strategy with respect to its oilfield services business has
been to maintain operations in east Texas, but not to expand such services to
other geographic regions. As a result of its decision to divest substantially
all of its operating assets, this business was sold on January 20, 1997 (see
"DISPOSITION OF OILFIELD SERVICES BUSINESS").
 
MARKET DEMAND FACTORS
 
    In recent years, the demand for the Company's waste management services has
resulted primarily from public concern over the quality of the environment and
ensuing adoption and enforcement of increasingly stringent federal, state and
local environmental laws and regulations. These laws and regulations have
increased the costs and potential liabilities associated with handling of
wastes, including used oil. Governmental regulation has also caused a number of
commercial treatment and disposal facilities to close, as many have been unable
to meet the increasingly strict siting and operating standards imposed by RCRA
and other applicable laws. Furthermore, many generators of hazardous and
non-hazardous wastes have chosen not to maintain their own treatment and
disposal facilities or to develop the technical expertise necessary to assure
regulatory compliance. Accordingly, many generators have sought to have their
waste streams managed by firms that possess collection, recycling, treatment,
transportation and disposal capabilities and have the expertise and financial
capacity necessary to comply with applicable environmental regulations.
 
    Additionally, concerns by generators about long-term liability has led the
industry toward waste minimization and recycle/recovery and thus have
significantly changed the market for both hazardous and non-hazardous waste
treatment and disposal in recent years, as waste generators continue to look for
ways to reduce or reuse the wastes they generate. Many generators and other
purchasers of waste management services have attempted to decrease the number of
providers of these services they utilize in response to liability concerns. The
Company believes that these trends will continually force waste management
services firms to focus on technological innovation, sound waste-tracking
capabilities and a heightened
 
                                       21
<PAGE>
commitment to customer service and responsiveness. It has been the Company's
intention to be responsive to these needs in the expansion of its hydrocarbon
recycling business.
 
BUSINESS SEGMENTS
 
    See Note 2 of Notes to Consolidated Financial Statements for information
regarding the Company's business segments.
 
WASTE MANAGEMENT SERVICES
 
    Following the divestiture of Gibraltar at year-end 1994, the waste
management services provided by the Company have consisted of the collection,
transportation, treatment, recycling, and management of non-hazardous liquid
industrial hydrocarbons, off-specification motor fuels, used oils, oil filters,
absorbents and related materials. These activities are collectively referred to
as "hydrocarbon recycling and recovery".
 
    TREATMENT AND RECYCLING OF OIL-WATER AND FUEL-WATER MIXTURES
 
    The Company treats selected non-hazardous oily fluids through phase
separation processes as a part of its hydrocarbon recycling and recovery
services. These oily fluids consist primarily of three types: industrial oily
fluids, off-specification motor fuels, and underground storage tank remediation
fluids. Oily fluids are broken into separate phases through the addition of
chemicals, heat, agitation, and mechanically-enhanced gravity separation.
Off-specification motor fuels and underground storage tank remediation fluids
are similarly processed at segregated facilities. The water recovered from the
above mixtures is treated and discharged to a local sewer system, and reclaimed
oil is marketed as industrial fuel. Recycled motor fuel is marketed as refinery
feedstock. The Company currently operates three hydrocarbon recycling and
recovery facilities in Baytown, Kilgore, and Corsicana, Texas. Sources of oily
fluids managed as used oils include industrial and manufacturing operations and
transportation activities. Sources of motor fuel-water mixtures managed as
off-specification motor fuels include motor fuel distribution, transportation,
and retailing activities. Underground storage tank fluid sources include
underground storage tank corrective action, removal, and groundwater remediation
activities.
 
    COLLECTION ACTIVITIES
 
    The Company transports high-water oily fluids using vacuum tank trucks and
other transports dedicated to the waste management business. The Company
collects motor fuel-water mixtures, as well as waste lubricants, machine
coolants, and other hydrocarbon-laden fluids, from industrial, manufacturing,
and transportation operations. Prior to treatment, these materials may be held
temporarily at one of the Company's transfer facilities. The Company also uses
its collection equipment to provide in-plant support services to industrial
companies and environmental engineering firms engaged in remediating groundwater
problems, cleaning up spills, or pumping and transporting industrial liquids and
sludges within their own plant sites.
 
    USED OIL COLLECTION AND RECOVERY SERVICES
 
    As a result of the asset acquisition in July 1995 described in Note 4 of
Notes to Consolidated Financial Statements, the Company began the collection and
marketing of used lubricating oils from various sources, including automobile
and truck dealers, transportation fleets, automotive garages, oil change
outlets, service stations, industrial plants, and other businesses. Currently,
the majority of this used oil is acquired with no fee payments to or from the
generator. Additionally, the Company currently acquires certain quantities of
used oil from other collectors, and typically pays the collectors for this
material based on the quantities and quality of the used oil acquired. This
purchased oil was formerly aggregated with the oil from the Company's own
collection activities and sold unprocessed to fuels blenders for use as a fuel
in certain industrial applications for which such oil is suitable. With the
startup of its distillate fuels
 
                                       22
<PAGE>
production facility in the 1996 second quarter, the Company began utilizing
substantially all of the used oil it collects and purchases as feedstock for the
manufacture of distillate fuel products, including marine diesel oil blendstock,
light distillates, and asphalt flux. Such conversion of used oils into
higher-value finished products allows the Company to derive revenue from the
sale of such products it sells into relatively large commodity markets. The new
plant is designed to process nominally 19.0 million gallons of feedstock
annually, including both used oils and mixed motor fuels. Although the plant
initially achieved such production rates for short periods of time, technical
problems and operational issues associated with startup of the used oil
processing operations prevented it from sustaining these throughput levels. As a
result, the plant's monthly production averaged 800,000 gallons during the
period from August 1996 to December, 1996 compared to its used oil processing
capacity of 1.2 million gallons per month. This production shortfall, as well as
a later-than-expected plant completion, materially impacted the decline in the
Company's liquidity during 1996. Management believes that certain capital
improvements to the plant, which are currently underway and scheduled to be
completed in the 1997 second quarter, will enable the plant to approach or
achieve its design and operating cost expectations.
 
    FILTER COLLECTION AND RECYCLING SERVICES
 
    Similarly, with the aforementioned asset acquisition, the Company began the
collection and recycling of used oil filters. In this business line, the Company
derives revenues from the fees it charges customers to manage used oil filters
and related products, as well as from the sale of the recovered products, as
described below. Containers (generally 55-gallon drums) of used automotive and
industrial filters and absorbents are typically collected from customers using
the Company's collection fleet and aggregated at selected sites in its network
of transfer facilities. These filters are then transported to the Company's
Baytown filter recycling facility, which commenced operations in April 1996.
Prior to the completion of its recycling plant, the Company utilized a
third-party processor to recycle the spent filters. The new filter processing
plant shreds, separates and recycles used oil filters into three reusable
components--used oil, filter fluff, and metal. The recovered used oil is
utilized as feedstock for the distillate fuels production facility described in
the preceding paragraph. The filter fluff is utilized as an alternative fuel
source for approved industrial users where possible, or otherwise properly
managed. The recovered metal is marketed as feedstock for regional "mini-mills"
in the steel-producing industry. The new facility is estimated to have a
single-shift processing capacity of approximately 97,000 drum equivalents of
filters annually.
 
    ANALYTICAL SERVICES
 
    The Company provides analytical services through two laboratory facilities
in Baytown and Kilgore that are integral to its ability to manage recyclable
hydrocarbons and used oil properly. These captive laboratory facilities perform
tests on the waste streams of customers and potential customers which enable the
Company to determine the optimal means of recycling or treatment. These tests
also allow the Company to determine whether or not it has the capability of
accepting the waste stream, determine whether the wastes conform to the
customer's pre-approved waste profile, and to estimate the cost of managing the
wastes. The Company's internal analytical capabilities are supplemented through
the use of outside commercial laboratories as needed.
 
OILFIELD SERVICES
 
    Until the Company's recent sale of its oilfield services assets (see
"DISPOSITION OF OILFIELD SERVICES BUSINESS"), this business segment consisted of
the transportation, management and disposal of various liquids which are used or
produced as waste in the drilling, completion, and production operations of oil
and gas wells. In particular, the Company had extensive capabilities in
supplying fluids and the necessary storage tanks for massive hydraulic fracture
treatments prevalent in its oilfield market in east Texas. The Company operated
a fleet of specialized trucks, some of which were also used in its hydrocarbon
recycling operations, for pumping and transporting oilfield drilling fluids and
oilfield liquid
 
                                       23
<PAGE>
waste, including produced salt water, and it rented to customers portable tanks
for well stimulation services and temporary fluids storage. The Company operated
three salt water disposal wells in east Texas. In addition, the Company sold
clear brine fluids which are used in well completion, workover, and fracturing
operations.
 
CUSTOMERS AND MARKETING
 
    The Company provides its waste management services to large and small-stream
generators of recyclable hydrocarbons engaged in the manufacturing,
transportation, steel, refining, chemical, automotive, and other industries. The
Company has historically derived a substantial portion of its revenues from
customers in Texas, Louisiana, and Arkansas. A substantial portion of the
Company's customers have used its services on an ongoing basis, although no
single customer accounted for more than 10% of the Company's consolidated
revenues in 1996.
 
    Waste streams are generally received by the Company pursuant to continuing
contracts which are terminable upon 30 days notice of either party and which do
not obligate either the customer to deliver, or the Company to accept, any
specific quantities of waste. The Company's waste management services are
marketed directly by its sales force. In addition to targeting small-stream
generators who require more value-added service, the sales force targets
medium-to-large companies who have large volumes of waste, and seeks to increase
the quantities of material managed on behalf of each existing customer by
serving more of the customer's locations and managing additional types of waste
streams.
 
COMPETITION
 
    The Company competes with numerous large and small companies in its waste
management services business. Among its primary competitors are Allwaste, Inc.,
Laidlaw Environmental, Inc., Safety-Kleen Corp., Specialty Environmental
Services, Philip Environmental and World Fuel Services, Inc. Each of these
companies is able to provide one or more of the waste management services
offered by the Company or alternative services, and many of the Company's
competitors have access to greater financial resources than does the Company. In
addition, the Company competes with other local or smaller regional companies,
many of which are privately-owned, that have hydrocarbon recycling capabilities
or that collect and market used oil. The Company believes that the principal
competitive factors in its markets for the waste management services it offers
are customers' ability to audit and approve competing waste treatment and
recycling facilities, comprehensiveness and quality of services, the degree of
sophistication of the treatment and recycling services offered (including the
number and types of materials capable of being processed), the availability of
alternative technologies, the physical proximity of facilities to customers, and
price.
 
REGULATION
 
    The Company is subject to comprehensive and continuously evolving regulation
by federal, state, and local authorities. These authorities are empowered to
regulate compliance with extensive environmental laws, regulations, and
ordinances. Federal environmental statutes affecting the business of the Company
include, but are not limited to, the Resource Conservation and Recovery Act of
1976 ("RCRA"), the Comprehensive Environmental Response, Compensation and
Liability Act of 1980 ("CERCLA"), Superfund Amendments and Reauthorization Act
of 1986 ("SARA"), the Safe Drinking Water Act, as amended (the "SDW Act"), the
Clean Air Acts of 1970 and 1972, as amended (the "Clean Air Acts"), the Clean
Water Act of 1972, as amended (the "Clean Water Act"), and the Occupational
Safety and Health Administration Act ("OSHA"). Such statutes are designed to
address management of waste at active disposal facilities, clean-up and
remediation of inactive hazardous waste sites, protection of public water
supplies, control of air quality standards, and exposure to toxic substances and
other forms of pollution in the workplace. These laws provide significant
penalties for violators, as well as continuing liability for waste generators,
owners, and operators of waste treatment facilities and others for past disposal
practices. Many
 
                                       24
<PAGE>
states have been authorized by the EPA to enforce regulations promulgated under
various federal environmental statutes. The state of Texas has authority to
administer most of the regulations related to RCRA as well as regulate the
management of non-hazardous industrial wastes. In addition, there are numerous
state and local authorities that further regulate the environment, some of which
impose standards stricter than those established in federal laws and
regulations. Penalties for violations of applicable laws or regulations include
injunctive relief, recovery of damages for injury to air, water or property, and
fines for non-compliance.
 
    In September 1992, the United States Environmental Protection Agency ("EPA")
finalized regulations that govern the management of used oils destined for
recycling. Although used oil is not classified as a hazardous waste under
federal law, certain states do regulate used oil as hazardous. The new
regulations address several areas of environmental risks that caused
environmental problems at used oil recycling facilities in the past, and contain
specific requirements for generators, transporters, and used oil processors. The
Texas Natural Resource Conservation Commission ("TNRCC") has adopted rules that
essentially implemented the EPA regulations in Texas effective March 26, 1996.
In some respects, these regulations are more stringent than the EPA rules,
including provisions for more frequent and comprehensive reporting and financial
assurance requirements for used oil processors. The Company has built and
operates its facilities to standards that meet and, in certain instances, exceed
current standards.
 
    The Company believes that it has obtained all material permits, approvals,
and authorizations required of it to operate its current hydrocarbon recycling
business. However, the Company may be required to obtain additional permits,
approvals, or authorizations or take substantial corrective action to retain
existing permits, approvals, and authorizations at its facilities to continue
current operations if new legislation or regulations are enacted or existing
laws and regulations are either amended or enforced differently. The Company may
in the future be required under these regulatory requirements to increase
capital and operating expenditures in order to maintain current operations or
initiate new operations. Under certain circumstances, the Company might be
required to curtail operations until a particular problem is remedied. Although
the Company cannot predict the extent to which any new legislation or regulation
may affect its operations, it is possible that changes in the current
environmental laws and regulations, or changes in the enforcement thereof, could
have a material adverse effect on the Company's operations, earnings and
competitive position.
 
    The waste generators serviced by the Company segregate hazardous waste from
non-hazardous waste and are aware of the penalties for misrepresenting wastes.
The Company requires generators of non-hazardous wastes to certify that the
wastes, for which they are seeking management and recycling services, are not
"hazardous" pursuant to federal regulations. The Company requires generators to
submit a characterization sample, along with pertinent analytical data, prior to
approval of the waste stream for collection.
 
    The Company is subject to enforcement actions for violations of any of its
permits. Citizens are entitled to file civil actions if certain regulatory
agencies fail to act on alleged violations of permits. The Company must comply
with all applicable regulations including those mandated by RCRA, OSHA, CERCLA,
the Clean Air Acts, the Clean Water Act, the SDW Act, and other applicable
regulations. The Company must exercise care to assure that it accepts only
wastes that it is authorized to manage at its various facilities. Evaluation of
the source generating waste materials, written representations required of the
generator, and analytical determinations (performed on samples of waste to be
received) are necessary to prevent the receipt of unauthorized wastes. In
addition to possible regulatory sanctions or fines associated with the receipt
of unauthorized materials, the Company must be concerned with possible risks to
its employees, equipment, and the environment that might result from receipt and
management of unauthorized wastes. When transporting wastes, the Company is
liable for any damages related to the accidental release of waste materials.
Such liability extends to injuries caused to individuals, costs related to
emergency response activities, and remediation of spill sites. Once wastes
arrive at one of the Company's facilities, the Company must assure that there is
no release of waste from tanks and containers
 
                                       25
<PAGE>
used for interim storage. Clean-up of such releases is mandated by state
regulation in the case of non-hazardous waste releases.
 
    Generators and transporters of hazardous substances, as well as past and
present owners and operators of hazardous release sites, are made strictly,
jointly and severally liable for the clean-up costs resulting from releases and
threatened releases of CERCLA-regulated hazardous substances. A large portion of
the materials collected by the Company are recycled or converted into materials
which may be used for another purpose. The amount of material that the Company
deposits at waste disposal sites is, therefore, small in relation to the volume
of materials collected by the Company, and the Company has sought new treatment
and processing technologies to reduce this amount even further. Additionally,
the Company periodically sends some of the materials it collects to selected
third party facilities for treatment and/or disposal. The Company audits
third-party treatment and disposal facilities prior to shipping any materials to
attempt to minimize its potential CERCLA liability at these sites. At the
present time, the Company is aware of only one proceeding in which the Company
may be a potentially responsible party (see "INFORMATION WITH RESPECT TO
REGISTRANT--Legal Proceedings").
 
COMPLIANCE AND RISK MANAGEMENT
 
    The Company regards compliance with applicable environmental laws and
regulations as a critical component of its overall operations, from providing
quality service to its customers to protecting the health and safety of its
employees and neighbors and protecting the Company's facilities from damage. The
Company strives to maintain the highest professional standards in its compliance
activities; its internal operating requirements are in many instances more
stringent than those imposed by regulation. The Company's compliance program has
been developed for each of its operational facilities under the direction of the
Company's compliance staff, which is responsible for facilities compliance,
health and safety, field safety, compliance training, transportation compliance,
and related record keeping.
 
    As part of the Company's continuing efforts to monitor environmental
compliance, its treatment and recycling facilities are periodically inspected by
its compliance staff, and also by regulators and customers. The Company believes
that its facilities are in substantial compliance with all applicable
requirements. Future legislation, regulatory interpretation, or administrative
procedures are likely to require capital expenditures to maintain compliance,
the amount of which cannot be anticipated. On certain occasions, the Company's
facilities have been cited for regulatory violations, and environmental problems
have been found in the facilities. The extent to which such violations and
problems have affected the financial condition and results of operations of the
Company is reflected in the Consolidated Financial Statements and Notes thereto
set forth on pages F-1 through F-26 herein. The Company has compliance and
health and safety representatives to oversee the implementation of the Company's
compliance program at its facilities. The Company also performs periodic
inspections of treatment, recycling, and disposal facilities of other firms
utilized by the Company.
 
    The Company follows a program of risk management policies and practices
designed to reduce potential liability as well as to manage customers' ongoing
regulatory responsibility. This program includes employee training, laboratory
testing and environmental monitoring, and policy decisions restricting the types
of wastes handled or projects undertaken. The Company evaluates all revenue
opportunities and declines those which it believes involve unacceptable risks.
 
    Typically, the Company applies established technologies to the treatment,
recycling, and disposal of wastes. The Company believes its operations are
conducted in a safe and prudent manner and in substantial compliance with
applicable laws and regulations. There can be no assurance, however, that the
Company is, in fact, in substantial compliance with such laws and regulations or
that it will not be subject to fines, damages, loss of permits, or other similar
consequences resulting from past, present or future violations.
 
                                       26
<PAGE>
INSURANCE
 
    The Company maintains insurance coverage for normal business risks,
including workers' compensation for its employees, automobile liability, general
liability, and excess liability insurance coverage. Additionally, the Company
carries pollution liability insurance providing coverage for damage to third
persons from pollution from its waste management facilities. Because this
coverage is on a claims-made basis, the Company will be covered only if the
policy is in place on the date the claim is asserted even if the Company carried
insurance on the date of the event giving rise to the claim.
 
    As discussed in Note 13 of Notes to Consolidated Financial Statements, the
Company has been notified by its pollution liability insurance carrier that the
carrier disputes the Company's interpretation of its pollution liability
insurance coverage and policy limitations applicable to certain pending claims
(see "INFORMATION WITH RESPECT TO REGISTRANT--Legal Proceedings").
 
EMPLOYEES
 
    At April 30, 1997, the Company employed approximately 181 persons. Of this
number, 17 were involved in corporate administrative and support functions and
164 were employed in its waste management services activities. The Company is
currently not a party to any collective bargaining agreements covering its
employees, has not experienced any work stoppages, and believes that relations
with its employees are good.
 
DESCRIPTION OF PROPERTIES
 
    The principal facilities of the Company are described below. Except as
otherwise indicated, the Company owns all of its principal facilities. The
Company has three facilities for processing and recycling certain materials
managed as non-hazardous oily wastes, off-specification motor fuels, and
underground storage tank remediation fluids. One of these facilities is located
in Kilgore, Texas at a site which is a short distance from where the Company
maintains operations offices for its local hydrocarbon recycling terminal. This
facility's processing and storage area is located on a 25-acre site with an
off-loading bay, tanks and other facilities for the testing and phase separation
of hydrocarbon-laden fluids and storing the recovered oil for shipment by truck
to the Company's distillate fuels processing facility, described below, or to
approved outlets. The Company has a facility for the recycling of
off-specification motor fuels and underground storage tank remediation fluids in
Corsicana, Texas. This facility's processing and storage area is located on an
11-acre site with an off-loading bay, tanks and other facilities for the phase
separation of motor fuels and storage of the recovered product for shipment by
truck to the Company's distillate fuels plant. The construction of a separations
plant near Baytown, Texas was completed in late 1993 for the recycling of
oil-water mixtures, off-specification motor fuels and underground storage tank
remediation fluids in separate processing units in a manner similar to that
described above for the two other facilities. This operation's analytical
testing, off-loading, processing and storage facilities are located on a 28-acre
site that is shared with various other facilities described below.
 
    The Company completed construction of an oil filter recycling facility at
its site in Baytown in April 1996, with an estimated single-shift processing
capacity of 97,000 drum equivalents of filters annually. The oil filter and
absorbent processing unit recovers high-grade scrap metal for use as steel
manufacturing feedstock and filter fluff with a targeted primary outlet for use
as supplemental fuel for approved industrial users. Construction of a distillate
fuels production facility at the Baytown site for the manufacture of marine
distillate fuels and related products from used oils and motor fuel feedstocks
was substantially completed in June 1996 and various operational issues
associated with startup have, until recently, hindered its ability to produce at
its design throughput objective of 1,300 barrels of feedstock per day.
 
    The Company also owns a terminal facility adjacent to its Baytown plant
consisting of approximately 6,300 square feet of office space, which also serves
as an administrative corporate office. Another terminal facility near Austin,
Texas, is owned and similar facilities in or near Dallas, Kilgore and San
Antonio, Texas,
 
                                       27
<PAGE>
Little Rock, Arkansas, and Baton Rouge, Louisiana are leased. These facilities
provide for the dispatching of trucks and equipment to customers and providing
other customer services, as well as serving as the base for regional sales
activities. In most cases, such facilities also temporarily hold non-hazardous
hydrocarbon-laden fluids, used oil and oil filters collected in the local
service areas, but do not process or treat these materials. All materials
collected are shipped by truck to one of the Company's treatment and recovery
facilities discussed in the previous paragraphs.
 
    The Company completed the relocation of its primary corporate offices and
consolidation of administrative support functions to Baytown, Texas in late
1996, utilizing the existing terminal facility referred to previously,
supplemented by an additional 3,000 square feet of modular office space. The
Company's previous corporate office in Kilgore, Texas, consisting of land and
approximately 10,000 square feet of office space, is currently held for sale or
lease.
 
    The Company's current mailing address is 4415 E. Greenwood, Baytown, Texas
77520. Following completion of the Transaction, the Company's mailing address
will be P.O. Box 1640, Kilgore, Texas 75662.
 
LEGAL PROCEEDINGS
 
    LITIGATION AND VARIOUS OTHER CLAIMS.  On January 26, 1996, Mobley Co. was
notified by the Texas Natural Resource Conservation Commission that it is a
potentially responsible party ("PRP") for the alleged release, during the early
or mid-1980s, of hazardous substances at the McBay Oil and Gas State Superfund
Site located near Grapeland, Texas. The Company has recorded an accrual for its
estimated exposure in connection with this matter, the amount of which is not
material to the consolidated financial statements.
 
    On May 3, 1996, the Company filed a complaint against National Union Fire
Insurance Company of Pittsburgh, Pa. ("National Union") in the United States
District Court for the Eastern District of Texas seeking declaratory judgment
that National Union is obligated to indemnify the Company under three pollution
legal liability insurance policies issued by National Union and that certain
claims previously made by the Company with respect to such policies are not
"related claims" covered by a single policy as is alleged by National Union.
Previously, National Union had issued three pollution liability policies to the
Company, each covering a different time period and each containing a provision
that all claims arising out of related or continuous acts would be considered a
single loss and be deemed first reported during the policy period in which the
initial claim was first reported. The Company sought a declaratory judgement
establishing that the foregoing provision was not applicable to claims that
might arise under various lawsuits in which the Company is a defendant (see
"Claims and Legal Proceedings Against Gibraltar" below).
 
    Additionally, in connection with its prior ownership of Gibraltar, the
Company is a party to lawsuits styled WILLIAMS V. GIBRALTAR CHEMICAL RESOURCES,
INC., STEICH V. GIBRALTAR CHEMICAL RESOURCES, INC. and DANIELS V. GIBRALTAR
CHEMICAL RESOURCES, INC. to which Gibraltar is also a party. These lawsuits are
described below.
 
    CLAIMS AND LEGAL PROCEEDINGS AGAINST GIBRALTAR.  In connection with the sale
of Gibraltar discussed in Note 3 of Notes to Consolidated Financial Statements,
the Company is obligated to indemnify AEC for certain claims against Gibraltar,
including various legal claims and proceedings disclosed to AEC, arising from
circumstances existing on or prior to the date of the sale of Gibraltar. The
following items constitute material legal claims and proceedings for which the
Company is obligated to indemnify AEC:
 
    A suit was filed against Gibraltar in August 1992 styled MONCRIEF V.
GIBRALTAR CHEMICAL RESOURCES, INC. in State District Court in Smith County,
Texas by certain persons who own land in the vicinity of Gibraltar's hazardous
waste facility in Winona, Texas. The suit asserts that the value of the
plaintiffs' land has been diminished as a result of the alleged emission of
objectionable odors from Gibraltar's facility. The plaintiffs assert various
grounds for recovery of damages and seek compensatory and punitive damages. The
 
                                       28
<PAGE>
Company defended these claims in a jury trial which resulted in inconsequential
damages being awarded to the plaintiffs on November 7, 1996. However, the
verdict is subject to appeal in accordance with applicable rules of civil
procedure.
 
    On October 18, 1993, a suit styled WILLIAMS V. GIBRALTAR CHEMICAL RESOURCES,
INC. was filed against the Company, Gibraltar, Mobley Co. and certain
individuals, former customers of Gibraltar and other entities. This case is
currently pending in the State District Court of Smith County, Texas. The named
plaintiffs, who have requested class certification, are certain individuals
residing in Smith County, and are seeking monetary damages for themselves and on
behalf of all other persons similarly situated. The petition alleges various
acts of negligence, fraudulent concealment, nuisance, trespass, and various
others resulting from operations of Gibraltar's hazardous waste facility.
Discovery is ongoing in this case. While the Company disputes the material
allegations of the plaintiffs' suit and is vigorously defending this litigation,
it is unable to determine the likelihood of an unfavorable outcome at this time.
 
    Also on October 18, 1993, a suit was filed against the Company, Gibraltar,
Mobley Co., and certain individuals, former customers of Gibraltar and other
entities, and is currently pending in State District Court in Smith County,
Texas styled STEICH V. GIBRALTAR CHEMICAL RESOURCES, INC. The three named
plaintiffs have allegedly lived in the vicinity of Gibraltar's hazardous waste
facility. The plaintiffs' seek compensation for damages allegedly resulting from
various acts of negligence, nuisance, trespass, and fraudulent concealment
committed by Gibraltar through its operations. Discovery is ongoing in this
case. While the Company disputes the material allegations of the plaintiffs'
suit and is vigorously defending the case, it is unable to determine the
likelihood of an unfavorable outcome at this time.
 
    A suit styled DANIELS V. GIBRALTAR CHEMICAL RESOURCES, INC. was filed on
August 31, 1995 in the State District Court of Dallas County, Texas against the
Company, Mobley Co., Gibraltar, and certain individuals, former customers of
Gibraltar and other entities by certain residents of Smith County, Texas. The
plaintiffs claim that they have experienced personal injury and property damage
which are alleged to have been caused by the operation of the Company's former
subsidiary, Gibraltar. The plaintiffs demand recovery of unspecified monetary
damages based on various legal grounds, including fraudulent concealment,
negligence, and assault & battery. This case is in the early stages of
discovery. While the Company disputes the material allegations of the
plaintiffs' suit and is vigorously defending the litigation, it is unable to
determine the likelihood of an unfavorable outcome at this time.
 
    A suit styled GLAZER V. GIBRALTAR CHEMICAL RESOURCES, INC. was filed on
September 6, 1994, in the United States District Court for the Eastern District
of Texas Tyler Division against Gibraltar by an individual and Mothers Organized
to Stop Environmental Sins ("MOSES"), under the citizens' suit provisions of the
Clean Air Act and the Resource Conservation and Recovery Act. The suit alleges
repeated and continuing violations of these federal environmental protection
statutes by Gibraltar and an imminent and substantial endangerment to public
health and the environment caused by Gibraltar's alleged improper
transportation, storage, treatment and disposal of solid and hazardous wastes.
The plaintiffs request that Gibraltar's hazardous waste facility be permanently
closed, civil penalties be imposed, and plaintiffs' costs of litigation be
awarded. The Company has recently been granted summary judgment as to a
significant number of the claims against it as the court found that certain
alleged violations of environmental protection statutes, on which plaintiffs'
claims were based, were diligently prosecuted by the State of Texas. The Company
continues to vigorously defend remaining claims in this litigation; however, it
is unable to determine the likelihood of an unfavorable outcome as to remaining
claims.
 
    A suit styled ADAMS V. AMERICAN ECOLOGY ENVIRONMENTAL SERVICES CORPORATION,
F/K/A GIBRALTAR CHEMICAL RESOURCES, INC. was filed on August 7, 1996 in the
State District Court of Tarrant County, Texas against Gibraltar by certain
individuals. The plaintiffs claim that they have experienced personal injury and
property damage which are alleged to have been caused by the operation of
Gibraltar. The plaintiffs demand recovery of unspecified monetary damages and
injunctive relief based on various legal grounds including negligence, assault
and battery, and intentional infliction of emotional distress. Discovery is
 
                                       29
<PAGE>
ongoing in this case. The Company may be obligated to indemnify the purchaser of
Gibraltar for certain losses resulting from the claims asserted by the
plaintiffs. While the Company disputes the material allegations of the
plaintiffs suit and intends to vigorously defend the litigation, it is unable to
determine the likelihood of an unfavorable outcome at this time.
 
    The Company is currently not able to reasonably estimate its potential
exposure with respect to the foregoing matters. The Company's future financial
condition, results of operations, and liquidity could be materially adversely
impacted as the nature and scope of the Company's ultimate liability arising
from Gibraltar's operations and sale become better defined. See Note 13 of Notes
to Consolidated Financial Statements for related information. Notwithstanding
the Transaction, all responsibility for the foregoing matters will be retained
by the Company. To the extent the Company is held liable for these matters, it
anticipates paying for any such obligations not covered by insurance with funds
retained from the net proceeds of the Transaction.
 
MARKET INFORMATION
 
    Prior to May 23, 1996, the Company's Common Stock was traded on the National
Market System of the National Association of Securities Dealers, Inc. Automated
Quotation System National Market System ("NASDAQ") under the symbol "MBLYA".
Since that date, the Company's Common Stock has been quoted for trading on the
OTC Bulletin Board under the same symbol. The following table presents the high
and low closing prices for the Company's Common Stock for 1995 and for 1996
prior to its de-listing, as reported by the NASDAQ. The table also reflects the
range of reported high and low bid quotations for the Company's Common Stock for
the period from May 23, 1996 through December 31, 1996 as reported by the OTC
Bulletin Board. Such over-the-counter market quotations reflect inter-dealer
prices, without retail mark-up, mark-down or commission and may not necessarily
represent actual transactions.
 
<TABLE>
<CAPTION>
                             1996                    1995
                     --------------------    --------------------
QUARTER ENDED          HIGH         LOW       HIGH         LOW
- -------------------- ---------    -------    -------    ---------
<S>                  <C>          <C>        <C>        <C>
March 31............ $  1 1/4     $ 5 5/8    $ 1 3/4    $ 1 3/8
June 30.............    1 1/4         5/8      2          1 3/8
September 30........   15 5/16        1/2      2            15/16
December 31.........      3/4         1/8      1 3/8        1/2
</TABLE>
 
    At April 4, 1997, there were approximately 1,100 beneficial owners of the
Company's Class A Common Stock, and 39 stockholders of record of the Company's
Class B Common Stock. Immediately preceding the public announcement of the
Transaction, the bid quotation for the Company's Class A Common Stock was $0.50.
 
    The Company has not paid any cash dividends on its Common Stock since its
initial public offering in September 1991 and has no current plans to make any
distributions (see "SALE OF THE ASSETS-- Future Plans of the Company").
 
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
  OPERATIONS
 
    THE FOLLOWING DISCUSSION SHOULD BE READ IN CONJUNCTION WITH THE COMPANY'S
AUDITED CONSOLIDATED BALANCE SHEETS AS OF DECEMBER 31, 1996 AND 1995, AND THE
RELATED CONSOLIDATED STATEMENTS OF OPERATIONS, STOCKHOLDERS' EQUITY, AND CASH
FLOWS FOR EACH OF THE YEARS IN THE THREE-YEAR PERIOD ENDED DECEMBER 31, 1996
("CONSOLIDATED FINANCIAL STATEMENTS") AND RELATED NOTES THERETO SET FORTH AT
PAGES F-1 TO F-26 ATTACHED HERETO.
 
GENERAL
 
    The Company provides diverse environmental and field-related services to
industrial, governmental, and commercial markets, and specializes in the
collection, transportation, treatment, recycling and management of a wide
variety of non-hazardous liquid hydrocarbons, oil filters, absorbents and
related
 
                                       30
<PAGE>
materials. Prior to the sale of Gibraltar at year-end 1994 (see Note 3 of Notes
to Consolidated Financial Statements), the Company's waste management services
activities also included the management of hazardous wastes. Prior to the sale
of its oilfield services assets on January 20, 1997, the Company also provided
oilfield services for managing liquids used or produced during the lifecycle of
oil and gas wells (see "DISPOSITION OF OILFIELD SERVICES BUSINESS" and Note 2 of
Notes to Consolidated Financial Statements).
 
    The Company's revenues have historically consisted of fees collected from
customers, principally related to waste management and oilfield services and, to
a lesser extent, from product sales and equipment rentals. As a result of new
business lines which began in 1995 and continued to grow in 1996, a larger
percentage of the Company's waste management services revenues have been derived
from sales of manufactured or recovered products. Revenues derived from waste
management services are closely associated with volumes of waste collected,
levels of service provided and the related pricing. Revenues from oilfield
services were derived from hourly and fixed charges for services provided,
equipment rentals and products sold. Cost of revenues include direct costs of
providing services to customers, such as labor, third party disposal, supplies
and other consumables, depreciation, utilities and fuel, equipment maintenance,
and repair. Selling, general and administrative expenses include selling and
marketing expenses, certain insurance and administrative salary expenses,
depreciation, amortization of goodwill, and legal and consulting fees.
 
    As more fully described in Note 13 of Notes to Consolidated Financial
Statements, the Company continues to defend various claims resulting from the
operations of Gibraltar. As of May 1, 1997, six such lawsuits were pending,
seeking compensatory and punitive damages for alleged personal injury and
property damage allegedly caused by operations and emissions of Gibraltar's
hazardous waste disposal facility, and permanent closure of the facility and
civil penalties as the remedy for alleged violations by Gibraltar of
environmental protection statutes and endangerment to public health and the
environment. These matters raise difficult and complex factual and legal issues,
including the nature and amount of the Company's liability, if any. Although the
Company is a defendant in certain of these claims, in other matters the
Company's potential liability arises from material contractual indemnifications
given by the Company to the purchaser of Gibraltar, including the potential
liability of certain former Gibraltar customers who have become defendants in
litigation involving Gibraltar's operations. The Company is currently unable to
reasonably estimate its potential exposure for defending such matters, any
indemnity obligations resulting therefrom, and any corresponding insurance
reimbursement. The Company's future financial condition, results of operations,
and liquidity could be materially adversely affected as the nature and scope of
the Company's ultimate liability arising from Gibraltar's operations and sale
become better defined.
 
RECENT AND PENDING ASSET SALES, DISCONTINUED OPERATIONS AND RESTRUCTURING
  CHARGES
 
    Due to the Company's inability to secure, on acceptable terms, the capital
resources necessary to continue the implementation of its strategic plans to
expand its hydrocarbon recycling and recovery business, and after considering
the attendant risks of continuing to pursue such strategy in light of its
severely strained liquidity, in September 1996, the Company's Board of Directors
determined that the divestiture of its operations was in the best interests of
the Company and its shareholders. Subsequently, on October 30, 1996 and November
1, 1996, the Company executed letters of intent to sell substantially all of its
operating assets in two separate transactions (see "SALE OF THE
ASSETS--Background of the Transaction, and--Reasons for the Transaction," Note 2
of Notes to Consolidated Financial Statements and "DISPOSITION OF OILFIELD
SERVICES BUSINESS"). Because of the sales pending at December 31, 1996, results
of operations of the Company's two business segments have been accounted for as
discontinued operations in the accompanying Consolidated Financial Statements.
The transactions and their impact on the Consolidated Financial Statements are
described in the following paragraphs.
 
                                       31
<PAGE>
    SALE OF WASTE MANAGEMENT SERVICES ASSETS & DISCONTINUANCE OF BUSINESS
SEGMENT.  As described herein, on October 30, 1996, the Company signed a letter
of intent with U.S. Filter to sell substantially all of the assets related to
its waste management services activities (see "SALE OF THE ASSETS"). The Assets
of the Business which are the subject of the letter of intent, and the
subsequently executed Agreement, are shown in the December 31, 1996 consolidated
balance sheet as "net assets of discontinued operations" at their estimated net
realizable value as determined by the terms of the Agreement, less anticipated
transaction costs of approximately $450,000. Such Assets had a net book value at
December 31, 1996 (net of assumed liabilities) of approximately $15,149,000. As
a result of the pending Transaction, the Company recorded a charge of $7,621,000
(net of a deferred income tax benefit of $698,000) during the 1996 third
quarter, representing the estimated loss on the disposal of the business
segment, including certain required capital expenditures prior to the
Transaction. In determining the estimated loss on disposal, only the $8.0
million fixed portion of the Purchase Price was considered (I.E., that portion
which is contingent on the future performance of the Business was ignored). The
Company estimates that it will incur additional operating losses in this
business segment, after the allocation of certain overhead and interest costs,
amounting to approximately $331,000 during the phase-out period from October 1,
1996 through the expected closing date of the sale. A provision for such
estimated net losses was recorded in the year ended December 31, 1996. The
Company's waste management services segment incurred a net loss of approximately
$288,000 during the period October 1, 1996 through December 31, 1996.
 
    SALE OF OILFIELD SERVICES ASSETS AND DISCONTINUANCE OF BUSINESS SEGMENT.  On
November 1, 1996, the Company signed a letter of intent with Dawson Production
Services, Inc. ("Dawson") to sell substantially all of the assets related to its
oilfield services business. Such sale was completed on January 20, 1997 pursuant
to a definitive asset purchase agreement. Under the terms of the definitive
agreement, the Company received $4,917,000 and a subordinated note in the amount
of $500,000, due in January 2002, in exchange for such assets. The assets which
are the subject of the sale had a net book value, based on historical cost
adjusted for accumulated depreciation and amortization, of approximately
$2,378,000 at December 31, 1996, and are shown in the December 31, 1996
consolidated balance sheet as "net assets of discontinued operations" at that
carrying amount. The results of operations of the discontinued segment through
the disposal date, after allocation of certain overhead and interest costs, did
not result in a loss and consequently, no additional losses have been reflected
in the statements of operations for the year ended December 31, 1996. The
Company's oilfield services segment generated net income of approximately
$120,000 during the period October 1, 1996 to December 31, 1996. The Company
recognized a gain upon completion of the sale, after transaction costs of
$255,000, amounting to approximately $2,800,000 in January 1997.
 
    In anticipation of the planned divestitures and after consideration of its
ongoing operational needs, the Company recorded certain restructuring expenses
during the 1996 third quarter. Such expenses, totaling $650,000, included
employee severance obligations, costs associated with the relocation and
recruitment of personnel, and other related expenses.
 
    The net effect of the transactions and related charges described in the
preceding paragraphs on the results of operations for the year ended December
31, 1996 approximated $8.6 million, and is summarized as follows (in thousands
of dollars):
 
<TABLE>
<S>                                                                   <C>
Provision for loss on disposal of waste management services
  segment...........................................................  $   8,319
Provision for losses during phase-out period of waste management
  services segment..................................................        331
Deferred income tax benefit.........................................       (698)
                                                                      ---------
                                                                          7,952
Restructuring expenses..............................................        650
                                                                      ---------
    Total...........................................................  $   8,602
                                                                      ---------
                                                                      ---------
</TABLE>
 
                                       32
<PAGE>
RESULTS OF OPERATIONS--1996 COMPARED TO 1995
 
    Revenues for the year ended December 31, 1996 amounted to $21,580,000
compared to $18,588,000 in 1995, an increase of $2,992,000, or 16.1%. All of the
increase was attributable to the waste management services segment, as revenues
from oilfield services during 1996 were virtually unchanged from the prior year.
 
    The growth in segment revenues stemmed largely from the continued expansion
of the Company's used oil and filter recycling activities, which contributed
$5,186,000 in 1996 vs. $960,000 in 1995. These new business lines commenced
operations in the 1995 third quarter with the Company's acquisition of an
existing business and their development has continued since that time through
enhancements of the Company's collection capabilities and the construction of
two new processing facilities in Baytown, Texas. The new facilities commenced
operation during 1996.
 
    Revenues from the Company's hydrocarbon/water separations business fell from
approximately $13,300,000 during 1995 to $12,021,000 in 1996, reflecting the
effect of a severe regional drought which greatly reduced fluid volumes received
for recycling in the first half of 1996. Such volumes, particularly those fluids
associated with the remediation of underground storage tanks, are generated from
groundwater and/or rainwater associated with construction activities and thus
are directly impacted by the amount of rainfall received.
 
    Gross profit (revenues less operating expenses) for the year ended December
31, 1996 totaled $4,333,000 compared to $5,731,000 in 1995. In the waste
management services segment, gross profit amounted to $3,201,000, or 18.6% of
revenues, in 1996, compared to $4,310,000, or 30.3% of segment revenues, in the
year-ago period. The marked degradation in gross margin was primarily
attributable to inordinately high costs associated with the startup of the new
used oil and filter recycling facilities. As discussed previously, such startup
began in the 1996 second quarter and while the new distillate fuels plant
initially achieved its design production rates, technical and operational
problems prevented the facility from sustaining these throughput levels. In
addition to the negative effect of the production shortfall on product yields,
higher maintenance costs also contributed to the reduced gross profit.
Ultimately, in order to achieve its design throughput and product yield
specifications, certain modifications to the facility, as originally designed
and constructed, were determined to be required. These capital improvements are
currently underway and scheduled to be completed in the 1997 second quarter.
Additionally, the diminished volumes referred to in the previous paragraph and
the relatively fixed nature of plant operating costs negatively impacted
profitability in its hydrocarbon/water separations business.
 
    Segment gross profit from oilfield services declined from $1,421,000 (32.6%
of revenues) in 1995 to $1,132,000 (25.9% of revenues) in 1996 largely the
result of an unfavorable business mix including reduced trucking and mobile
storage tank rental income and a higher proportion of lower-margin contract
services revenue. Segment profitability was further weakened by higher operating
costs, particularly those related to transportation services provided.
 
    Selling, general and administrative ("SG&A") expenses during 1996 were
$5,925,000 compared to $7,035,000 in 1995. Such costs in 1995 included certain
non-recurring expenses, including adjustments to insurance accruals, severance
expenses related to the retirement of an executive officer, relocation costs,
and legal and consulting fees. Excluding the effect of such costs, SG&A expenses
declined slightly during 1996 from their 1995 levels. As a percentage of
revenues, SG&A expenses amounted to 27.5% and 37.8% in 1996 and 1995,
respectively, reflecting, in part, the increased leverage of the Company's
overhead costs resulting from its new business lines.
 
    Other expense, net in 1996 amounted to $329,000 and consisted principally of
interest expense on bank indebtedness and other miscellaneous expenses,
partially offset by interest income on invested funds and other miscellaneous
receipts. In 1995, other expense, net amounted to $630,000, including losses
 
                                       33
<PAGE>
associated with the Company's Mexican operations, which were sold in the 1995
second quarter, and the writedown of a building held for sale to its estimated
net realizable value.
 
    In connection with the planned asset divestitures discussed previously, the
Company recorded a deferred income tax benefit of $698,000 during 1996,
representing a reduction in previously established deferred tax liabilities. No
other income tax expense or benefit was recognized during the year.
 
RESULTS OF OPERATIONS--1995 COMPARED TO 1994
 
    Total revenues fell from $29,510,000 in 1994 to $18,588,000 in 1995, an
overall decline of 37.0%. The decline was attributable to a 44.8% decline in
waste management services revenue, partially offset by a 17.4% increase in
oilfield services revenue. On a pro forma basis (excluding Gibraltar in 1994),
revenues from waste management services grew 3.2% in 1995.
 
    Increased waste management services revenues in 1995 compared to pro forma
revenues in the prior year were attributable to the revenue contribution of the
used oil and filter businesses acquired in July 1995, which approximated
$960,000 for the partial-year period. 1995 revenues from the Company's
hydrocarbon recycling activities involving the separation of relatively low
hydrocarbon/high water mixtures declined 3.8% compared to those of 1994, despite
an expansion into Baton Rouge, Louisiana in early 1995, while such revenues from
collection terminals open twelve months or longer decreased by approximately
6.0% during the year. This decline was largely a result of diminished volumes of
fluids collected in 1995, partially mitigated by improved pricing. A significant
special project in the 1994 first quarter, accounting for nearly 5% of the
year's total volume, as well as unusually heavy rainfall in the Texas Gulf Coast
region during the 1994 fourth quarter, were also key factors in the 1995
relative volume shortfall. Fluid volumes associated with underground storage
tank remediation activities fell precipitously in 1995 compared to 1994 levels,
partly the result of an extended regional drought in the latter part of the year
which continued into 1996. Volumes of industrial oily wastes, which are more
production-oriented as opposed to event-driven, increased approximately 15.4%
during the same period. This pronounced shift in business mix, which began in
1994, continued throughout 1995 and has been largely driven by market changes
and regulatory influences. Revenues from transportation and plant-related
services increased modestly in 1995 compared to the prior year, largely on the
strength of a significant one-time project in the Dallas, Texas area, but the
overall revenue contribution from large nonrecurring sources declined somewhat
during the year.
 
    Revenues in the Company's oilfield services business in 1995 surpassed 1994
levels by 17.4% due to renewed marketing efforts, including a focus on new
revenue sources, and weaker activity from this sector during the second and
third quarters of 1994.
 
    Total gross profit for the year ended December 31, 1995 fell 6.0% to
$5,731,000 from $6,094,000 in the prior year. On a segment basis, gross profit
from waste management services fell 9.1% during 1995, while gross profit from
oilfield services increased 5.1%. Stated as a percentage of revenues, waste
management services gross profit increased to 30.3% in 1995 from 18.4% in the
prior year, which included the impact of Gibraltar's significantly diminished
revenues and relatively high operating costs in 1994. Excluding the effects of
Gibraltar, the 1994 segment gross profit margin was 36.0%. The relative decline
in 1995 profitability was influenced by higher analytical and plant operating
expenses throughout the year, particularly at the Company's Baytown, Texas
oil-fuel-water separations facility. These escalated operating expenses were
attributable, in part, to the ongoing shift in business mix toward more
difficult-to-treat oily waste streams, as noted previously, and reflect the
startup of a new terminal operation in Baton Rouge, Louisiana in the 1995 first
quarter. Throughout 1995, management devoted substantive attention to the
enhancement of its Baytown operations and made significant capital improvements
at the facility. 1995 gross profit was further weakened by higher labor and
maintenance costs, as well as equipment utilization issues, relating to the
transportation services provided by the Company.
 
                                       34
<PAGE>
    Segment gross profit from oilfield services declined as a percentage of
revenue in 1995 to 32.6% from 36.5% a year ago, largely as a result of
competitive pricing pressures and a less profitable mix of business, despite the
increased activity and revenues referred to previously.
 
    SG&A expenses totaled $7,035,000 in 1995 vs. $9,483,000 in 1994, a 25.8%
decrease. Excluding the effects of Gibraltar on 1994 overhead expenses, such
costs increased 12.5% in 1995 primarily as a result of certain nonrecurring
expenses in the fourth quarter amounting to approximately $770,000. These
expenses included the following approximate amounts: insurance costs of
$235,000, severance expenses of $300,000 related to the retirement of an
executive officer, costs associated with the relocation of certain executive
officers totaling $100,000, consulting fees of $50,000 related to the Company's
strategic review of its opportunities for possible business combinations, and
certain legal expense accruals amounting to $70,000. Additionally, 1995 SG&A
spending was impacted by the incremental overhead costs associated with the
acquisition and new business lines discussed in Note 3 of Notes to Consolidated
Financial Statements, which amounted to approximately $375,000. Excluding the
impact of the significant one-time charges referred to previously, 1995 SG&A
expenses were relatively flat with pro forma 1994 expenses, despite the added
SG&A costs of the acquired businesses. Management continued its cost containment
efforts throughout 1995 in light of the Company's smaller revenue base following
the sale of Gibraltar at year-end 1994. As a percentage of revenues, 1995 SG&A
expenses amounted to 37.8% (33.7% excluding the special charges) vs. 32.1% in
1994 (35.7% on a pro forma basis).
 
    Other expense, net of $276,000 in 1995 resulted from a $392,000 write-down
of the carrying value of a Kilgore, Texas office building to its estimated net
realizable value in the 1995 fourth quarter, partially offset by other income.
The building, previously used by the Company as a corporate office, has been
held for sale since the Company relocated its corporate offices and consolidated
its administrative support functions. Other income, net of $50,000 in 1994
included a net loss on asset dispositions, offset by lease income and
miscellaneous other net receipts.
 
    Interest income, net of $193,000 for the year ended December 31, 1995
compares to net interest expense of $154,000 in 1994. The Company had virtually
no indebtedness outstanding during 1995, prior to borrowings on its term loan
facility in December to fund certain capital expenditures. Strained liquidity
during 1994, leading up to the completion of the sale of Gibraltar at year-end,
resulted in higher levels of outstanding indebtedness throughout the year.
 
    Losses associated with the Company's Mexican operations in 1995 totaled
$547,000, including a second quarter loss on the sale of the Company's 25%
interest in Pro Ambiente, S.A. de C.V., a Mexican joint venture (see Note 4 of
Notes to Consolidated Financial Statements). During 1994, the Company's equity
in losses of the joint venture amounted to $55,000. Additionally, at year-end
1994, the Company recorded, as a reduction of stockholders equity, a $700,000
write-down of its joint venture investment through establishment of a valuation
allowance for foreign currency translation losses. Such write-down was
necessitated by the devaluation of the Mexican peso late in 1994.
 
    The 1995 income tax benefit was $471,000, and consisted of a refund of
previously-paid Federal income taxes and net deferred income tax benefits
resulting principally from differences in depreciation expense for financial
accounting and income tax reporting purposes. Income tax expense for 1994 was
$547,000, and was impacted by the establishment of valuation allowances for
deferred tax assets resulting from an assessment of their likely realizability.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    During the year ended December 31, 1996, the Company used net cash of
approximately $206,000 in its operating activities, including its discontinued
waste management services and oilfield services operations. The substantial net
loss posted by the Company during the year of $10,235,000 included significant
net non-cash charges amounting to $8,602,000 for anticipated losses in
connection with the pending disposal of its waste management services assets and
related restructuring expenses.
 
                                       35
<PAGE>
    Capital expenditures in 1996 amounted to approximately $5,339,000 compared
to $5,226,000 in 1995 and $3,042,000 in 1994. Capital spending during 1995 and
1996 included approximately $6,188,000 associated with the construction of two
new recycling plants at the Company's Baytown, Texas facility as part of a major
expansion initiative.
 
    The substantial losses sustained by the Company in 1995 and 1996, coupled
with the significant capital requirements necessary to support its facilities
expansion, have severely weakened the Company's liquidity, substantially
consuming its cash resources and exhausting its existing borrowing capacity. The
sizeable capital investment referred to in the previous paragraph was funded
largely through bank borrowings, resulting in outstanding indebtedness of
$5,014,000 at year-end 1996. On January 20, 1997, the Company utilized
$3,300,000 of the cash proceeds realized from the sale of its oilfield services
assets to reduce such outstanding bank indebtedness, and the maturity date of
its credit agreement with Bank One, Texas, N.A. was amended to be March 31,
1997. The Company has been in violation of certain covenant requirements of the
credit agreement since June 30, 1996, placing it in technical default, and no
additional borrowings are available under such agreement. The Company and the
bank subsequently extended the maturity date of the credit agreement to May 31,
1997 to accommodate the expected completion of the Transaction and the Company
intends to retire the remaining outstanding indebtedness with the proceeds from
such sale.
 
    Presently, it is contemplated that all or substantially all of the $8.0
million in U.S. Filter Stock received at the closing of the Transaction will be
sold as soon as possible thereafter, resulting in net proceeds totaling
approximately $5.8 million after repayment of the aforementioned outstanding
bank indebtedness (approximately $1.75 million) and transaction expenses
estimated at $450,000. Such net proceeds will be used to fund the liabilities
retained by the Company following the sale, and the remaining surplus cash is
expected to be invested in relatively low-risk, liquid short-term investments.
The Company anticipates that ongoing general and administrative expenses will be
reduced to approximately $300,000 annually upon completion of the sale, and
expects earnings from investments to largely offset such costs. The amounts
described herein are approximate and based on the Company's current estimates.
Furthermore, there can be no assurance that such amounts will actually be
realized.
 
    In addition to the aforementioned proceeds, under the terms of the
Agreement, the Company may receive up to $4.0 million in U.S. Filter Stock
during the two-year period following the sale based on the financial performance
of the Business. Additionally, the Company received a $500,000 subordinated note
receivable from Dawson, bearing interest at 8.5%, which matures in January 2002.
 
    Because of its indemnification obligations related to the sale of Gibraltar,
as well as potential indemnity obligations with respect to the asset sales to
U.S. Filter and Dawson, and in light of the ongoing litigation (see "INFORMATION
WITH RESPECT TO REGISTRANT--Legal Proceedings"), the Company, based on
consultation with legal counsel, does not currently anticipate making a
distribution to its shareholders in the foreseeable future. As circumstances
change or additional information with respect to the extent of the Company's
potential indemnity obligations becomes available, the Board of Directors will
continue to evaluate various uses of the Company's funds. While the Company may
investigate new business opportunities that arise, the nature and probability of
any investments which might result from such investigations cannot be
determined.
 
    In the event that the sale to U.S. Filter is not consummated, the Company's
Board of Directors may seek to sell some or all of the Company's assets to
another purchaser or purchasers. The Company's inability to consummate the sale
to U.S. Filter as planned in a timely manner could have a material adverse
effect on the Company's consolidated financial position and liquidity.
 
ENVIRONMENTAL MATTERS
 
    The Company is subject to extensive and evolving regulation by federal,
state, and local authorities. This body of law provides for significant
penalties for violators, as well as continuing liability for waste generators,
owners, and operators of waste disposal facilities and others for past disposal
practices. The
 
                                       36
<PAGE>
Company regards environmental compliance as a critical component of its overall
operations, from providing quality service to its customers to protecting the
health and safety of its employees and protecting human health and the
environment. This environmental compliance effort is the shared responsibility
of all operating personnel and is under the direction of a staff of employees
who are responsible for its facilities' compliance, health and safety, field
safety, compliance training, and related recordkeeping. The Company has taken,
and is routinely taking, measures to correct all known existing problems and to
safeguard against potential problems. The Company believes that its facilities
are in substantial compliance with all applicable requirements. Future
legislation, regulatory interpretation, or administrative procedures are likely
to require capital expenditures to maintain compliance, the amount of which
cannot be anticipated.
 
MANAGEMENT'S RESPONSIBILITY FOR THE CONSOLIDATED FINANCIAL STATEMENTS
 
    The Consolidated Financial Statements of the Company are the responsibility
of management. They have been prepared in accordance with generally accepted
accounting principles and include estimates and judgments made by management.
 
    To meet the responsibility for reliable financial data, management maintains
a system of internal accounting controls which is designed to provide reasonable
assurance that transactions are executed as authorized and are accurately
recorded and that assets are properly safeguarded. Although accounting controls
are designed to achieve this objective, it must be recognized that errors or
irregularities may occur. In addition, it is necessary to assess and balance the
relative costs and the expected benefits of the internal accounting controls.
 
    The Company's independent auditors, KPMG Peat Marwick LLP, have audited the
Consolidated Financial Statements in accordance with generally accepted auditing
standards, which include a review of the system of internal accounting controls
only to the extent necessary to determine audit procedures required to express
their opinion.
 
CERTAIN TRENDS AND UNCERTAINTIES
 
    As a cautionary note to investors, the Company and its representatives may
make oral or written statements from time to time that are "forward-looking
statements" within the meaning of the United States federal securities laws,
including information contained in this Information Statement which is not
historical. There are a number of important factors which could cause actual
results and consequences to differ materially from those anticipated. Such
factors include, but are not limited to, those set forth below.
 
    COMPLETION OF THE TRANSACTION.  Closing of the Transaction described herein
is subject to various conditions set forth in the Agreement (see "SALE OF THE
ASSETS--Terms of the Agreement & Related Matters"), many of which are beyond the
control of the Company. The Company's inability to consummate the sale of the
Assets to U.S. Filter or another prospective purchaser in a timely manner could
have a material adverse effect on the Company's consolidated financial position
and liquidity.
 
    INABILITY TO LIQUIDATE SHARES OF U.S. FILTER STOCK.  As further described
herein (see "SALE OF THE ASSETS--Use of Proceeds of Transaction"), it is
currently contemplated that all or substantially all of the U.S. Filter stock to
be received at the time of the closing of the Transaction will be sold by the
Company as soon as possible following such closing. There can be no assurances
that the Company will, in fact, will be able to sell such shares, nor can there
be any assurance of the amounts that will actually be realized from such sales,
if any.
 
    RESOLUTION OF INDEMNIFICATION OBLIGATIONS AND PENDING LITIGATION.  As
discussed elsewhere herein (See "INFORMATION WITH RESPECT TO REGISTRANT--Legal
Proceedings" and Note 13 to Notes of Consolidated Financial Statements), the
Company has various outstanding contractual indemnification obligations and is a
defendant in various pending litigation matters. These matters raise difficult
and
 
                                       37
<PAGE>
complex factual and legal issues, including but not limited to, the nature and
amount of the Company's liability, if any. The Company, based on consultation
with legal counsel, believes that it is probable that it will continue to incur
certain costs associated with the foregoing matters and accordingly, in
connection with the divestiture of Gibraltar in 1994, established an accrual for
its estimated out-of-pocket expenses related to the ongoing administrative
management of such matters. However, the Company is currently unable to
reasonably estimate its potential exposure for defending such matters, any
indemnity obligations resulting therefrom, and any corresponding insurance
reimbursement. The Company's future financial condition, results of operations,
and liquidity could be materially adversely impacted as the nature and scope of
the Company's ultimate liability arising from Gibraltar's operations and sale
become better defined.
 
    FUTURE PLANS OF THE COMPANY.  For reasons described herein (see "SALE OF THE
ASSETS--Future Plans of the Company"), the Company does not currently anticipate
making a distribution to its shareholders in the foreseeable future. As
circumstances change or additional information with respect to the extent of the
Company's potential indemnity obligations becomes available, the Board of
Directors will continue to evaluate various uses for the Company's funds. While
the Company may investigate new business opportunities that arise, the nature
and probability of any investments which might result from such investigations
cannot be determined. The Company anticipates that its ongoing general and
administrative expenses will be reduced to approximately $300,000 annually upon
completion of the Transaction, and expects earnings from investments to largely
offset such costs. This amount is based on current estimates and actual amounts
could differ from this estimate.
 
                    INFORMATION WITH RESPECT TO U.S. FILTER
 
    U.S. Filter is a leading global provider of industrial and municipal water
and wastewater treatment systems, products and services, with an installed base
of systems that U.S. Filter believes is one of the largest worldwide. U.S.
Filter offers a single-source solution to industrial and municipal customers
through what U.S. Filter believes is the industry's broadest range of
cost-effective systems, products, services and proven technologies. In addition,
U.S. Filter has one of the industry's largest networks of sales and service
facilities. U.S. Filter capitalizes on its large installed base, extensive
distribution network and manufacturing capabilities to provide customers with
ongoing local service and maintenance. U.S. Filter is also a leading provider of
service deionization and outsourced water services, including the operation of
water and wastewater treatment systems at customer sites.
 
    U.S. Filter has grown internally and through the strategic acquisition and
successful integration of more than 65 United States based and international
water and wastewater treatment companies since 1991. On a previously reported
basis, U.S. Filter's revenues increased to $472.5 million for the fiscal year
ended March 31, 1996 from $41.2 million for the fiscal year ended March 31,
1992, representing a compound annual growth rate of approximately 84%. U.S.
Filter's revenues for the fiscal year ended March 31, 1996 would have been
approximately $1.8 billion after giving effect to the completed acquisitions of
Zimpro Environmental, Inc. and Davis Water & Waste Industries, Inc. and
including, on a pro forma basis, the completed acquisition of Process Equipment
Division of United Utilities PLC and the acquisitions of the Water Systems and
Manufacturing Group of Wheelabrator Technologies, Inc., WaterPro Supplies
Corporation and The Utility Supply Group, Inc. as if such acquisitions were
completed at the beginning of such year.
 
    Global population growth, economic expansion, scarcity of available water
resources, heightened public concern about water quality and growing regulatory
requirements have resulted in: (i) continued growth of the multibillion dollar
water and wastewater treatment industry; and (ii) heightened demand for
increasingly complex water and wastewater treatment systems. The water treatment
industry is highly fragmented, with numerous regional participants who provide
customers with a limited range of water and wastewater treatment solutions. U.S.
Filter differentiates itself from competitors by serving as a single-source
water and wastewater treatment provider capable of designing, manufacturing,
operating, financing
 
                                       38
<PAGE>
and maintaining water and wastewater systems on a local basis for industrial and
municipal customers. U.S. Filter's customer base includes a broad range of major
industrial customers, which require treated water as a necessary component of
many products and industrial processes, and municipalities, which treat water
and wastewater for their communities. Industrial customers include Chinese
Petroleum, Coca-Cola, Dow Chemical, General Motors, Hyundai, Intel, Johnson &
Johnson, Merck, Procter & Gamble and Samsung. Municipal customers include the
Cities of Los Angeles, Minneapolis-St. Paul and St. Louis.
 
    U.S. Filter is subject to the informational reporting requirements of the
Exchange Act and reports, proxy statements and other information filed by U.S.
Filter in accordance therewith contain additional material information
concerning U.S. Filter. See "AVAILABLE INFORMATION" contained elsewhere in this
Information Statement. U.S. Filter's principal executive offices are located at
40-004 Cook Street, Palm Desert, California 92211, and its telephone number is
(619) 340-0098. References herein to U.S. Filter refer to United States Filter
Corporation and its subsidiaries, unless the context requires otherwise.
 
                               FINANCIAL MATTERS
 
CONSOLIDATED FINANCIAL STATEMENTS
 
    The Company's audited balance sheets as of December 31, 1996 and 1995, and
the related consolidated statements of operations, stockholders' equity, and
cash flows for each of the years in the three-year period ended December 31,
1996 and related notes thereto are set forth at Pages F-1 to F-26 attached
hereto, and are referred to herein as the Consolidated Financial Statements.
 
HISTORICAL AND PRO FORMA SELECTED FINANCIAL DATA
 
    Certain historical financial information of the Company and certain pro
forma financial information of the Company after giving effect to the
Transaction is set forth on page S-1 attached hereto.
 
UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION
 
    Certain unaudited pro forma condensed consolidated financial information of
the Company after giving effect to the Transaction is set forth on pages S-2
through S-4 attached hereto.
 
ACCOUNTING TREATMENT OF THE TRANSACTION
 
    Because of the pending Transaction, results of operations of the Company's
waste management services segment have been accounted for as discontinued
operations in the Consolidated Financial Statements.
 
    As discussed in Note 2 of Notes to Consolidated Financial Statements, a
charge of approximately $7.6 million (net of a deferred income tax benefit of
$698,000) was required during the year ended December 31, 1996, representing the
estimated loss on the disposal of the Assets, including certain required capital
expenditures prior to consummation of the Transaction amounting to approximately
$900,000. This loss was determined based on the terms of the pending
Transaction, less anticipated transaction costs. In determining the estimated
loss on disposal, only the $8.0 million fixed portion of the sales price was
considered (I.E., that portion of the total consideration which is contingent on
the future performance of the Business was ignored). Additionally, anticipated
operating losses in this segment, after the allocation of certain overhead and
interest costs, amounting to approximately $331,000 during the phase-out period
from October 1, 1996 through the expected closing date of the sale have been
reflected in the consolidated statements of operations for the year ended
December 31, 1996 through an additional charge to earnings. In anticipation of
the pending Transaction as well as the sale of its oilfield services business,
the Company recorded certain restructuring charges during the year ended
December 31, 1996 approximating $650,000. No additional gain or loss is expected
to result from the Transaction.
 
                                       39
<PAGE>
FEDERAL INCOME TAX CONSEQUENCES
 
    The Company will realize a capital loss as a result of the consummation of
the Transaction in an amount equal to the excess of its adjusted basis in the
Assets over their adjusted sales price. The Company estimates that such loss
will amount to approximately $7.6 million. The loss will be used to offset the
capital gain which resulted from the disposition of the Company's oilfield
services assets, which approximated $3.7 million.
 
                                APPRAISAL RIGHTS
 
    Under the Delaware General Corporation Law, no appraisal rights are
available to shareholders of the Company in connection with the Transaction.
 
                                          By Order of the Board of Directors of
 
                                           MOBLEY ENVIRONMENTAL SERVICES, INC.
 
                                                 W. CHRISTOPHER CHISHOLM
                                                        SECRETARY
 
May 9, 1997
 
                                       40
<PAGE>
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors and Stockholders
Mobley Environmental Services, Inc.:
 
    We have audited the accompanying consolidated balance sheets of Mobley
Environmental Services, Inc. and subsidiaries as of December 31, 1996 and 1995,
and the related consolidated statements of operations, stockholders' equity, and
cash flows for each of the years in the three-year period ended December 31,
1996. These consolidated financial statements are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
consolidated 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 consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Mobley
Environmental Services, Inc. and subsidiaries as of December 31, 1996 and 1995,
and the results of their operations and their cash flows for each of the years
in the three-year period ended December 31, 1996, in conformity with generally
accepted accounting principles.
 
KPMG PEAT MARWICK LLP
 
Shreveport, Louisiana
February 28, 1997, except for the second sentence
 of the last paragraph of note 7 which is as of
 March 31, 1997
 
                                      F-1
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
 
                           DECEMBER 31, 1996 AND 1995
                       (IN THOUSANDS, EXCEPT SHARE DATA)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                                               1996       1995
                                                                                             ---------  ---------
<S>                                                                                          <C>        <C>
Current assets:
  Cash and cash equivalents................................................................  $     385  $   1,476
  Trade receivables, less allowance for doubtful accounts of $50 in 1996 and $257 in
    1995...................................................................................        161      2,836
  Prepaid expenses and other current assets................................................        207        582
  Net assets of discontinued operations--current...........................................      1,144     --
                                                                                             ---------  ---------
      Total current assets.................................................................      1,897      4,894
  Property, plant, and equipment, net......................................................        230     12,837
  Excess of purchase price over fair value of net assets acquired, net.....................     --          1,122
  Net assets of discontinued operations--non-current.......................................      9,659     --
  Other assets, net........................................................................        197        244
                                                                                             ---------  ---------
                                                                                             $  11,983     19,097
                                                                                             ---------  ---------
                                                                                             ---------  ---------
                                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Notes payable and current portion of long-term debt......................................  $   5,014         70
  Accounts payable.........................................................................        633      1,306
  Accrued expenses.........................................................................      3,721      3,613
                                                                                             ---------  ---------
      Total current liabilities............................................................      9,368      4,989
Long-term debt, less current portion.......................................................     --            490
Other long-term liabilities................................................................     --            166
Deferred income taxes......................................................................        148        846
                                                                                             ---------  ---------
      Total liabilities....................................................................      9,516      6,491
                                                                                             ---------  ---------
Stockholders' equity:
  Preferred stock, $.01 par value; 2,000,000 shares authorized, none issued................     --         --
  Common stock, $.01 par value:
    Class A, 15,000,000 shares authorized; 4,155,097 and 4,085,343 shares issued and
      outstanding in 1996 and 1995, respectively...........................................         42         41
    Class B, 10,000,000 shares authorized; 4,764,903 shares issued and 4,680,196 shares
      outstanding in 1996, 4,834,657 shares issued and 4,749,950 shares outstanding in
      1995.................................................................................         48         49
  Additional paid-in capital...............................................................     25,159     25,159
  Accumulated deficit......................................................................    (22,486)   (12,251)
  Deferred compensation costs under restricted stock agreements............................       (288)      (384)
  Treasury stock, 84,707 shares of Class B common stock, at cost...........................         (8)        (8)
                                                                                             ---------  ---------
      Total stockholders' equity...........................................................      2,467     12,606
Commitments and contingencies
                                                                                             ---------  ---------
                                                                                             $  11,983  $  19,097
                                                                                             ---------  ---------
                                                                                             ---------  ---------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-2
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
                 YEARS ENDED DECEMBER 31, 1996, 1995, AND 1994
            (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS AND SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                1996        1995        1994
                                                                             ----------  ----------  ----------
<S>                                                                          <C>         <C>         <C>
Revenues...................................................................  $   --      $   --      $   --
Cost of revenues...........................................................      --          --          --
                                                                             ----------  ----------  ----------
    Gross profit...........................................................      --          --          --
Selling, general, and administrative expenses..............................         516         683         376
Restructuring expenses.....................................................         650      --          --
                                                                             ----------  ----------  ----------
    Operating loss.........................................................      (1,166)       (683)       (376)
Other expense, net.........................................................        (120)       (630)         (5)
                                                                             ----------  ----------  ----------
    Loss from continuing operations before income taxes....................      (1,286)     (1,313)       (381)
Income tax benefit.........................................................      --             320          49
                                                                             ----------  ----------  ----------
    Loss from continuing operations........................................      (1,286)       (993)       (332)
                                                                             ----------  ----------  ----------
Discontinued operations, net of tax:
  Provision for loss on disposal of waste management services segment......      (7,621)     --          --
  Provision for losses during phase-out period of waste management services
    segment................................................................        (331)     --          --
  Net loss from operations of waste management services segment............        (623)       (318)     (3,727)
  Net loss from operations of oilfield services segment....................        (374)       (152)        (36)
                                                                             ----------  ----------  ----------
    Loss from discontinued operations......................................      (8,949)       (470)     (3,763)
                                                                             ----------  ----------  ----------
    Net loss...............................................................  $  (10,235) $   (1,463) $   (4,095)
                                                                             ----------  ----------  ----------
                                                                             ----------  ----------  ----------
Net loss per share:
  Continuing operations....................................................  $    (0.15) $    (0.12) $    (0.04)
  Discontinued operations..................................................       (1.01)      (0.05)      (0.48)
                                                                             ----------  ----------  ----------
                                                                             $    (1.16) $    (0.17) $    (0.52)
                                                                             ----------  ----------  ----------
                                                                             ----------  ----------  ----------
Weighted average number of common shares outstanding.......................   8,835,293   8,378,142   7,915,293
                                                                             ----------  ----------  ----------
                                                                             ----------  ----------  ----------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-3
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
 
                 YEARS ENDED DECEMBER 31, 1996, 1995, AND 1994
                       (IN THOUSANDS, EXCEPT SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                   1996        1995        1994
                                                                                ----------  ----------  ----------
<S>                                                                             <C>         <C>         <C>
Preferred stock--none issued..................................................  $   --      $   --      $   --
                                                                                ----------  ----------  ----------
Class A common stock:
  Balance at beginning of year................................................          41          27          26
  Issuance of 420,000 shares of restricted common stock.......................      --               4      --
  Issuance of 500,000 shares of common stock in connection with asset
    acquisition...............................................................      --               5      --
  Conversion of Class B common stock (69,754 shares in 1996, 500,809 shares in
    1995, and 30,263 shares in 1994)..........................................           1           5           1
                                                                                ----------  ----------  ----------
    Balance at end of year....................................................          42          41          27
                                                                                ----------  ----------  ----------
Class B common stock:
  Balance at beginning of year................................................          49          54          55
  Conversion into Class A common stock (69,754 shares in 1996, 500,809 shares
    in 1995, and 30,263 shares in 1994).......................................          (1)         (5)         (1)
                                                                                ----------  ----------  ----------
    Balance at end of year....................................................          48          49          54
                                                                                ----------  ----------  ----------
Additional paid-in capital:
  Balance at beginning of year................................................      25,159      23,788      23,788
  Issuance of restricted common stock.........................................      --             626      --
  Issuance of common stock in connection with asset acquisition...............      --             745      --
                                                                                ----------  ----------  ----------
    Balance at end of year....................................................      25,159      25,159      23,788
                                                                                ----------  ----------  ----------
Accumulated deficit:
  Balance at beginning of year................................................     (12,251)    (10,788)     (6,693)
  Net loss....................................................................     (10,235)     (1,463)     (4,095)
                                                                                ----------  ----------  ----------
    Balance at end of year....................................................     (22,486)    (12,251)    (10,788)
                                                                                ----------  ----------  ----------
Allowance for foreign currency translation loss:
  Balance at beginning of year................................................      --            (700)     --
  Provision for foreign currency translation loss.............................      --            (155)       (700)
  Reduction in allowance for foreign currency translation loss due to sale of
    investment in foreign joint venture.......................................      --             855      --
                                                                                ----------  ----------  ----------
    Balance at end of year....................................................      --          --            (700)
                                                                                ----------  ----------  ----------
Deferred compensation costs under restricted stock agreements:
  Balance at beginning of year................................................        (384)     --             (12)
  Issuance of restricted stock................................................      --            (630)     --
  Amortization of deferred compensation costs.................................          96         246          12
                                                                                ----------  ----------  ----------
    Balance at end of year....................................................        (288)       (384)     --
                                                                                ----------  ----------  ----------
Treasury stock................................................................          (8)         (8)         (8)
                                                                                ----------  ----------  ----------
      Total stockholders' equity..............................................  $    2,467  $   12,606  $   12,373
                                                                                ----------  ----------  ----------
                                                                                ----------  ----------  ----------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-4
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
                  YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                      1996       1995       1994
                                                                                   ----------  ---------  ---------
<S>                                                                                <C>         <C>        <C>
Cash flows from operating activities:
  Net loss.......................................................................  $  (10,235) $  (1,463) $  (4,095)
  Adjustments to reconcile net loss to net cash provided by (used in) operating
    activities:
    Provision for loss on disposal and losses during phase-out period of waste
      management services segment................................................       8,650     --         --
    Provision for restructuring charges..........................................         650     --         --
    Depreciation and amortization................................................       2,594      2,361      3,431
    Deferred income tax expense (benefit)........................................        (698)      (471)       547
    Deferred compensation costs under restricted stock agreements................          96        246         12
    Provision for losses on accounts receivable..................................      --            200        271
    Equity in net loss and loss on sale of joint venture.........................      --            323         55
    Write-down of assets.........................................................      --            392     --
    Changes in certain operating assets and liabilities:
      Trade receivables..........................................................        (698)      (123)      (612)
      Other assets...............................................................        (126)       343      1,150
      Accounts payable...........................................................         840     (1,732)     2,161
      Accrued expenses and other liabilities.....................................      (1,279)      (265)    (2,409)
                                                                                   ----------  ---------  ---------
        Net cash provided by (used in) operating activities, including
          discontinued operations................................................        (206)      (189)       511
                                                                                   ----------  ---------  ---------
Cash flows from investing activities:
  Capital expenditures...........................................................      (5,339)    (5,226)    (3,042)
  Proceeds from sale of joint venture investment.................................      --          1,324     --
  Acquisition of assets..........................................................      --           (770)    --
  Proceeds from sale of subsidiary, net of $229 cash balance at date of sale.....      --         --          5,500
  Other investing activities, net................................................      --             56        135
                                                                                   ----------  ---------  ---------
        Net cash provided by (used in) investing activities, including
          discontinued operations................................................      (5,339)    (4,616)     2,593
                                                                                   ----------  ---------  ---------
Cash flows from financing activities:
  Net borrowings on revolving lines of credit....................................       4,686     --            135
  Principal payments on long-term debt...........................................        (232)    (1,750)      (651)
  Borrowings of long-term debt...................................................      --            560        250
  Net advances from purchaser prior to sale of subsidiary........................      --         --          3,355
                                                                                   ----------  ---------  ---------
        Net cash provided by (used in) financing activities, including
          discontinued operations................................................       4,454     (1,190)     3,089
                                                                                   ----------  ---------  ---------
        Net increase (decrease) in cash and cash equivalents.....................      (1,091)    (5,995)     6,193
Cash and cash equivalents at beginning of year...................................       1,476      7,471      1,278
                                                                                   ----------  ---------  ---------
Cash and cash equivalents at end of year.........................................  $      385  $   1,476  $   7,471
                                                                                   ----------  ---------  ---------
                                                                                   ----------  ---------  ---------
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                      F-5
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                       DECEMBER 31, 1996, 1995, AND 1994
 
(1) DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
    PRINCIPLES OF CONSOLIDATION--The accompanying financial statements present
the consolidated accounts of Mobley Environmental Services, Inc. (the "Company")
and its wholly-owned subsidiaries, Hydrocarbon Technologies, Inc. ("HTI"),
Gibraltar Chemical Resources, Inc. ("Gibraltar"), and Mobley Company, Inc.
("Mobley"). In the fourth quarter of 1996, the Company announced its plans to
sell substantially all of its operating assets and completed the sale of the
assets of its oilfield services segment in January 1997 (note 2). On December
31, 1994, the Company sold Gibraltar (note 3). All significant intercompany
accounts and transactions have been eliminated in consolidation.
 
    DESCRIPTION OF BUSINESS--The Company provides diverse environmental and
field-related services to industrial, governmental, and commercial markets, and
specializes in the collection, transportation, treatment, recycling, and
management of a wide variety of non-hazardous liquid hydrocarbons, oil filters,
absorbents, and related materials. Prior to the sale of Gibraltar in 1994, the
Company's waste management services activities also included the management of
hazardous wastes. Prior to sale of the Company's oilfield services segment in
January 1997, the Company also provided oilfield services for managing liquids
used or produced during the lifecycle of oil and gas wells. The Company operates
primarily in the states of Texas, Louisiana, and Arkansas.
 
    BASIS OF PRESENTATION--The accompanying consolidated financial statements
have been prepared assuming that the Company will continue as a going concern.
As discussed in note 2, the Company's Board of Directors determined that the
divestiture of its operations was in the best interests of the Company and its
shareholders. The consolidated financial statements do not include any
adjustments that might result from the liquidation of the Company.
 
    CASH EQUIVALENTS--For purposes of reporting cash flows, the Company
considers investments with original maturities of three months or less to be
cash equivalents. Cash equivalents consist of investments in money market
accounts at December 31, 1996 and 1995.
 
    REVENUE RECOGNITION--Waste management services revenues are recognized when
the services are performed or upon the receipt and acceptance of waste material
at the Company's transfer or processing facilities. Upon the recognition of such
revenue, appropriate incidental treatment and residual disposal costs are
accrued. In the case of product sales, revenues are recognized upon acceptance
of the related product by the customer. Oilfield services revenues are
recognized when the services are performed.
 
    PROPERTY, PLANT, AND EQUIPMENT--Property, plant, and equipment are recorded
at cost and depreciated using the straight-line method over their estimated
useful lives ranging from three to thirty years.
 
    MAINTENANCE AND REPAIRS--Major repairs to disposal well facilities are
estimated and accrued by monthly charges to expense. Periodic costs incurred for
such items are charged against the related accrued expenses. All other
maintenance and repair costs are charged to expense as incurred. Renewals and
betterments are capitalized.
 
    IMPAIRMENT OF LONG-LIVED ASSETS AND LONG-LIVED ASSETS TO BE DISPOSED OF--The
Company adopted the provisions of Statement of Financial Accounting Standards
No. 121, Accounting for the Impairment of Long-Lived Assets and for Long-Lived
Assets to be Disposed Of ("SFAS 121"), on January 1, 1996. SFAS 121 requires
that long-lived assets and certain identifiable intangibles be reviewed for
impairment whenever events or changes in circumstances indicate that the
carrying amount of an asset may not be recoverable. Recoverability of assets to
be held and used is measured by a comparison of the carrying
 
                                      F-6
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(1) DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
(CONTINUED)
amount of an asset to future net cash flows, undiscounted and without interest
charges, expected to be generated by the asset. If such assets are considered to
be impaired, the impairment to be recognized is measured by the amount by which
the carrying amount of the assets exceed the fair value of the assets. Assets to
be disposed of are reported at the lower of the carrying amount or fair value
less costs to sell.
 
    In its review of possible asset impairment, management considered the
following factors: (i) the limited operating history of the Company's new
business endeavors prior to and as of January 1, 1996; (ii) the fact that a
substantial part of its capital assets were under construction prior to and as
of January 1, 1996; and (iii) the anticipated continued operations of the
Company, and the expected future net cash flows to be generated by such
operations. Based on these facts and circumstances, and considering its
analyses, management of the Company concluded that there was no indicated
impairment of the Company's assets consequently, the adoption of SFAS 121 did
not have a material impact on its financial position or results of operations.
Subsequent to the adoption of SFAS 121, the Company announced its plans to sell
substantially all of its operating assets which required material adjustments to
the carrying values of the Company's assets in the third quarter of 1996 (note
2).
 
    INVESTMENT IN JOINT VENTURE--Investment in joint venture consisted of a 25%
interest in Pro Ambiente, S.A. de C.V. ("Pro Ambiente"), a joint venture in
Mexico. On July 12, 1995, the Company sold its interest in Pro Ambiente (note
5). This investment was accounted for by the equity method.
 
    Assets and liabilities of Pro Ambiente were translated at the rate of
exchange in effect on the last day of each fiscal year. The related translation
adjustments are reflected in the allowance for foreign currency translation loss
in the stockholders' equity section of the consolidated balance sheet at that
date. Income and expenses have been translated at the average rates of exchange
prevailing during the year.
 
    INTANGIBLE ASSETS--Intangible assets are stated at unamortized cost and
consist primarily of excess of purchase price over fair value of net assets
acquired (goodwill). Historically, the carrying value of intangible assets has
been periodically reviewed by the Company based on the expected future
undiscounted operating cash flows of the related business segment. Goodwill was
being amortized over a fifteen-year life on a straight-line basis prior to the
decision to sell substantially all operating assets (note 2).
 
    INCOME TAXES--Income taxes are accounted for under the asset and liability
method. Deferred tax assets and liabilities are recognized for the future tax
consequences attributable to differences between the financial statement
carrying amounts of existing assets and liabilities and their respective tax
bases and operating loss and tax credit carryforwards. Deferred tax assets and
liabilities are measured using enacted tax rates expected to apply to taxable
income in the years in which those temporary differences are expected to be
recovered or settled. The effect on deferred tax assets and liabilities of a
change in tax rates is recognized in income in the period that includes the
enactment date.
 
    EARNINGS PER SHARE--Earnings per share computations are based on the
weighted average number of common and dilutive common equivalent shares
outstanding.
 
    USE OF ESTIMATES--Management of the Company has made a number of estimates
and assumptions relating to the reporting of assets and liabilities and the
disclosure of contingent assets and liabilities to prepare these financial
statements in conformity with generally accepted accounting principles. Actual
results could differ from those estimates which could have a material adverse
effect on the Company's future financial condition, results of operations and
liquidity as disclosed in note 13.
 
                                      F-7
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(1) DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
(CONTINUED)
    FINANCIAL INSTRUMENTS AND CREDIT RISK CONCENTRATIONS--Financial instruments
which potentially subject the Company to concentrations of credit risk consist
principally of cash equivalents and trade receivables. The Company places its
cash equivalents with high credit quality financial institutions; however, such
amounts are generally in excess of federally insured limits. Although the
Company does not require collateral for trade receivables, the credit risk is
limited due to the large number of customers. For the years ended December 31,
1996, 1995, and 1994 no customer accounted for more than 10% of revenues. At
December 31, 1996 and 1995, no receivable, that is going to be retained by the
Company after completion of the proposed transactions to sell its operating
assets, from any customer exceeded 5% of stockholders' equity.
 
    Statement of Financial Accounting Standards No. 107, DISCLOSURES ABOUT FAIR
VALUE OF FINANCIAL INSTRUMENTS, requires that the Company disclose estimated
fair values for its financial instruments. Fair value estimates are set forth
below for the Company's financial instruments:
 
    - Cash, Cash Equivalents, Trade Receivables, Accounts Payable, and Accrued
      Expenses--The carrying amounts approximate fair value because of the short
      maturity of these instruments.
 
    - Notes Payable and Long-term Debt--The carrying amount of the notes payable
      and long-term debt approximates market because of the variable interest
      rate, which is based on the bank's prime rate, or the current interest
      rate available to the Company for debt of similar terms approximates the
      existing rate.
 
    The fair value estimates are made at a specific point in time, based on
relevant market information and information about the financial instruments.
These estimates are subjective in nature and involve uncertainties and matters
of significant judgment and therefore cannot be determined with precision.
Changes in assumptions could significantly affect the estimates.
 
    STOCK OPTION PLANS--Prior to January 1, 1996, the Company accounted for its
stock option plans in accordance with the provisions of Accounting Principles
Board Opinion No. 25, ACCOUNTING FOR STOCK ISSUED TO EMPLOYEES ("APB 25") and
related interpretations. As such, compensation expense would be recorded on the
date of grant only if the current market price of the underlying stock exceeded
the exercise price. On January 1, 1996, the Company adopted Statement of
Accounting Standards Statement No. 123, ACCOUNTING FOR STOCK-BASED COMPENSATION
("SFAS 123"), which permits entities to recognize as expense over the vesting
period the fair value of all stock-based awards on the date of grant.
Alternatively, SFAS 123 also allows entities to continue to apply the provisions
of APB 25 and provide pro forma net income and pro forma earnings per share
disclosures for employee stock option grants made in 1995 and future years as if
the fair-value-based method defined in SFAS 123 has been applied. The Company
has elected to continue to apply the provisions of APB 25 and provide the pro
forma disclosure provisions of SFAS 123 (note 11).
 
    RECLASSIFICATIONS--Certain amounts in the prior year's financial statements
have been reclassified to conform to the current year presentation.
 
(2) RECENT AND PENDING ASSET SALES AND DISCONTINUED OPERATIONS
 
    In light of the Company's severely weakened financial condition and, in
particular, concerns about its liquidity, the Board of Directors reviewed the
challenges facing the Company and discussed in general terms the alternatives
available to address them. Among other things, the Board of Directors considered
 
                                      F-8
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(2) RECENT AND PENDING ASSET SALES AND DISCONTINUED OPERATIONS (CONTINUED)
(i) the Company's relatively small size and the resultant constraints on its
ability to make significant investments in additional processing or collection
businesses without an infusion of equity in an industry characterized by
increasing consolidation, intensifying competition, and continued growth through
acquisition by larger entities with greater access to financial resources than
has the Company; (ii) the Company's inability to obtain bank financing and the
unfavorable results of recent efforts to attract equity investors to fund
activities contemplated by the Company's strategic business plan; (iii) the
Company's default under its bank credit agreement due to its inability to
maintain compliance with certain covenants contained in such agreement; and (iv)
the Company's severely strained liquidity and immediate need for working capital
to continue its current operations. As part of these deliberations, management
and the Company's financial advisors reviewed in detail with the Board of
Directors their efforts with third parties to attract possible investments in,
or strategic alliances with, the Company. Since such efforts had not yielded
access to funds on terms acceptable to the Company, the Board of Directors
determined that the divestiture of its operations was in the best interests of
the Company and its shareholders. These circumstances required the Company to
re-evaluate the basis used to assess the carrying values of assets pursuant to
the provisions of SFAS 121. Subsequently, on October 30, 1996, and November 1,
1996, the Company executed letters of intent to sell substantially all of its
operating assets in two separate transactions. The transactions and their impact
on the Company's consolidated financial statements are described in the
following paragraphs. The Company's waste management services segment consists
of the operations of HTI and certain operations of Mobley. The Company's
oilfield services segment consists of certain operations of Mobley.
 
    SALE OF WASTE MANAGEMENT SERVICES ASSETS AND DISCONTINUANCE OF BUSINESS
SEGMENT.  On October 30, 1996, the Company signed a letter of intent with United
States Filter Corporation ("USF") to sell substantially all of the assets
related to its waste management services activities. Under the terms of the
letter of intent, the Company will receive $8,000,000 in shares of USF common
stock (registered with the Securities and Exchange Commission) in exchange for
such assets, and can earn up to an additional $4,000,000 in USF common stock
based on the performance of the business during the two years following its
sale, currently anticipated to be completed in the 1997 second quarter.
Additionally, USF will assume certain liabilities (accounts payable and accrued
expenses) as part of the transaction. The letter of intent further specifies
that the sales price of the assets will be adjusted upward or downward based on
the level of net assets, as defined, at the time of closing. Completion of the
transaction is subject to final negotiation and signing of a definitive
acquisition agreement, which is expected to contain standard conditions to
closing, including board and shareholder approval and due diligence, and the
distribution of an Information Statement describing the proposed transaction to
the Company's shareholders.
 
    The net assets which are the subject of the letter of intent are shown in
the accompanying December 31, 1996, consolidated balance sheet as "net assets of
discontinued operations" at their estimated net realizable value as determined
by the aforementioned terms, less anticipated transaction costs of approximately
$450,000. Such assets have a net book value at December 31, 1996, (net of
assumed liabilities) of approximately $15,149,000. As a result of the pending
sale, the Company recorded a charge of $7,621,000 (net of a deferred income tax
benefit of $698,000) during the year ended December 31, 1996, representing the
estimated loss on the disposal of the business segment, including certain
required capital expenditures prior to the sale amounting to approximately
$900,000. In determining the estimated loss on disposal, only the $8,000,000
fixed portion of the sales price was considered (i.e., that portion which is
contingent on the future performance of the business was ignored). Such loss was
recognized in the third quarter, when it was determined that a sale of the
assets was necessary given the Company's inability to secure acceptable
financing and concerns about its liquidity. Prior to that time, the evaluation
of potential
 
                                      F-9
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(2) RECENT AND PENDING ASSET SALES AND DISCONTINUED OPERATIONS (CONTINUED)
asset impairment had been made on a "going-concern" basis and cash flow
projections for the segment supported the carrying values of the related assets.
The Company estimates that it will incur additional operating losses in this
business segment, after the allocation of certain overhead and interest costs,
amounting to approximately $331,000 during the phase-out period from October 1,
1996 to the expected closing date of the transaction. A provision for such
estimated net losses has been made in the accompanying consolidated statements
of operations for the year ended December 31, 1996. The Company's waste
management services segment incurred a net loss of approximately $288,000 during
the period October 1, 1996 to December 31, 1996.
 
    SALE OF OILFIELD SERVICES ASSETS AND DISCONTINUANCE OF BUSINESS SEGMENT.  On
November 1, 1996, the Company signed a letter of intent with Dawson Production
Services, Inc. to sell substantially all of the assets related to its oilfield
services business. Such sale was completed on January 20, 1997, pursuant to a
definitive asset purchase agreement. Under the terms of the definitive
agreement, the Company received approximately $4,917,000 and a subordinated note
in the amount of $500,000, due in January 2002, in exchange for such assets. The
assets which were the subject of the sale had a net book value, based on
historical cost adjusted for accumulated depreciation and amortization, of
approximately $2,378,000, and are shown in the accompanying December 31, 1996,
consolidated balance sheet as "net assets of discontinued operations" at that
carrying amount. The results of operations associated with the discontinued
segment through the anticipated disposal date, after allocation of certain
overhead and interest costs, did not result in a loss and consequently, no
additional losses have been reflected in the accompanying statements of
operations for the year ended December 31, 1996. The Company's oilfield services
segment generated net income of approximately $120,000 during the period October
1, 1996, to December 31, 1996. The Company recognized a gain upon completion of
the sale, after transaction costs of approximately $255,000, amounting to
approximately $2,800,000 in January 1997.
 
    In anticipation of the planned divestitures and the significant reduction in
personnel necessary to support the administration of the Company's remaining
assets, the Company recorded certain restructuring expenses, none of which are
expected to benefit its future activities, during the 1996 third quarter. Such
expenses, totaling $650,000, included employee severance obligations of
approximately $285,000, costs associated with the relocation and recruitment of
personnel of approximately $155,000, and other related expenses of approximately
$210,000. Substantially all of such costs were subsequently incurred during the
1996 fourth quarter and 1997 first quarter. The twelve employees to be
terminated are primarily involved in providing certain corporate support
functions, including accounting, information systems, and environmental, health
and safety.
 
    Because of the outstanding contractual indemnification obligations of the
Company and in light of pending litigation to which the Company is a party, the
Company will remain in existence and incur certain general and administrative
expenses for the foreseeable future but will have no operating assets after the
sale of its waste management services segment to USF. Therefore, certain general
and administrative expenses and nonoperating income and expense have been
accounted for as continuing operations. Future costs incurred in connection with
these indemnification obligations and litigation responsibilities will be
reported as part of the discontinued operations in which they originated or to
which they relate. The Company believes it is probable that it will continue to
incur certain costs associated with these legal matters and accordingly, in
connection with the divestiture of Gibraltar in 1994, established an accrual for
estimated out-of-pocket expenses related to the ongoing administrative
management of such matters. However, the Company is currently unable to
reasonably estimate its potential exposure for defending
 
                                      F-10
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(2) RECENT AND PENDING ASSET SALES AND DISCONTINUED OPERATIONS (CONTINUED)
such matters, any indemnity obligations resulting therefrom, and any
corresponding insurance reimbursement (note 13).
 
    The Company's two business segments, waste management services and oilfield
services, have been accounted for as discontinued operations, and accordingly,
their operations have been segregated in the accompanying consolidated
statements of operations. The revenues, operating costs and expenses, interest
expense, and income taxes for the years ended December 31, 1996, 1995, and 1994,
have been reclassified for amounts associated with the discontinued segments.
Due to the relative significance of the Company's business segments to its
operations as a whole, and in light of the Company's decision to divest itself
of substantially all of its operating assets in the 1996 third quarter, the
Company has allocated certain general and administrative expenses to the
business segments in the accompanying consolidated statements of operations and
note 2. Historically, such costs had been treated as "corporate overhead" and
thus not allocated. The Company believes that such allocation provides financial
information that is more indicative of the actual operating results of the
business segments. However, such allocation method differs from that used in
presenting certain information about the Company's business segments in its
annual report on Form 10-K for the years ended December 31, 1995, 1994 and 1993.
General and administrative expenses attributable to continuing operations have
been determined based upon an allocation of such costs betweeen the business
segments and continuing operations. Restructuring charges, other income and
expense, and equity in losses and loss from sale of joint venture have been
recorded as continuing operations as such amounts are not specifically
attributable to either of the Company's business segments which are being
disposed of. Interest expense has been allocated to the segments based on the
outstanding indebtedness attributable to each of the business segments. Income
taxes have been allocated based on the effective tax rate, after a specific
charge to the waste management services segment for the change in the
beginning-of-the-year balance of the valuation allowance for deferred tax assets
of Gibraltar.
 
                                      F-11
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(2) RECENT AND PENDING ASSET SALES AND DISCONTINUED OPERATIONS (CONTINUED)
    Operating results and the estimated loss on disposal of the Company's waste
management services segment for the years ended December 31, 1996, 1995, and
1994 are as follows (in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                 1996       1995       1994
                                                               ---------  ---------  ---------
<S>                                                            <C>        <C>        <C>
Revenues.....................................................  $  17,207  $  14,233  $  25,801
Cost of revenues.............................................     14,006      9,923     21,059
                                                               ---------  ---------  ---------
  Gross profit...............................................      3,201      4,310      4,742
Selling, general, and administrative expenses, including
  allocated amounts..........................................      3,902      4,730      7,714
                                                               ---------  ---------  ---------
  Operating loss.............................................       (701)      (420)    (2,972)
Interest expense, net........................................       (210)    --           (154)
                                                               ---------  ---------  ---------
  Loss before income taxes...................................       (911)      (420)    (3,126)
Income tax expense (benefit).................................     --           (102)       601
                                                               ---------  ---------  ---------
  Net loss from operations of waste management services
    segment..................................................       (911)      (318)    (3,727)
Reduction in reserve for losses from operations of waste
  management services segment during phase-out period........        288     --         --
                                                               ---------  ---------  ---------
                                                               $    (623) $    (318) $  (3,727)
                                                               ---------  ---------  ---------
                                                               ---------  ---------  ---------
Provision for losses from operations of waste management
  services segment during phase-out period, recognized in the
  third quarter of 1996......................................  $    (331) $  --      $  --
                                                               ---------  ---------  ---------
                                                               ---------  ---------  ---------
Provision for loss on disposal of waste management services
  segment, recognized in the third quarter of 1996:
  Asset valuation adjustment.................................     (5,673)    --         --
  Accrued transaction costs and capital expenditures
    subsequent to measurement date...........................     (1,595)    --         --
  Write-off of excess of purchase price over fair value of
    net assets acquired......................................     (1,051)    --         --
  Deferred income tax benefit................................        698     --         --
                                                               ---------  ---------  ---------
                                                               $  (7,621) $  --      $  --
                                                               ---------  ---------  ---------
                                                               ---------  ---------  ---------
</TABLE>
 
                                      F-12
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(2) RECENT AND PENDING ASSET SALES AND DISCONTINUED OPERATIONS (CONTINUED)
    Operating results of the Company's oilfield services segment for the years
ended December 31, 1996, 1995, and 1994 are as follows (in thousands of
dollars):
 
<TABLE>
<CAPTION>
                                                                     1996       1995       1994
                                                                   ---------  ---------  ---------
<S>                                                                <C>        <C>        <C>
Revenues.........................................................  $   4,373  $   4,355  $   3,709
Cost of revenues.................................................      3,241      2,934      2,357
                                                                   ---------  ---------  ---------
  Gross profit...................................................      1,132      1,421      1,352
Selling, general, and administrative expenses, including
  allocated amounts..............................................      1,506      1,622      1,393
                                                                   ---------  ---------  ---------
  Operating loss.................................................       (374)      (201)       (41)
Income tax benefit...............................................     --            (49)        (5)
                                                                   ---------  ---------  ---------
  Net loss from operations of oilfield services segment..........  $    (374) $    (152) $     (36)
                                                                   ---------  ---------  ---------
                                                                   ---------  ---------  ---------
</TABLE>
 
    At December 31, 1996, the net assets of the Company's waste management
services segment are recorded at their estimated net realizable value and the
net assets of its oilfield services segment are recorded at their net book
value, and are included in the accompanying consolidated balance sheet as "net
assets of discontinued operations." Such assets are summarized as follows (in
thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                WASTE
                                                              MANAGEMENT    OILFIELD
                                                               SERVICES     SERVICES      TOTAL
                                                             ------------  -----------  ---------
<S>                                                          <C>           <C>          <C>
Trade receivables..........................................   $    2,873    $     500   $   3,373
Other current assets.......................................          519           32         551
Property, plant and equipment, net of accumulated
  depreciation of $14,087 and valuation reserve of
  $5,673...................................................        7,780        1,846       9,626
Excess of purchase price over fair value of net assets
  acquired, net of accumulated amortization of $101 and
  valuation reserve of $1,051..............................       --           --          --
Other assets, net..........................................           33       --              33
Current liabilities........................................       (2,780)      --          (2,780)
                                                             ------------  -----------  ---------
  Net assets of discontinued operations....................   $    8,425    $   2,378   $  10,803
                                                             ------------  -----------  ---------
                                                             ------------  -----------  ---------
</TABLE>
 
    Presently, it is contemplated that all or substantially all of the USF
common stock received at the time of closing will be immediately sold. Such
proceeds will be used to fund the current liabilities retained by the Company,
with the remaining surplus cash expected to initially be deployed in short-term
investments. The Company anticipates that ongoing general and administrative
expenses will be reduced to approximately $300,000 annually, and expects
earnings from investments to largely offset such costs. The amounts described
herein are approximate and based on the Company's current estimates.
Furthermore, there can be no assurance that such amounts will actually be
realized.
 
    In the event that the sale to USF is not consummated, the Company's Board of
Directors may seek to sell some or all of the Company's assets to another
purchaser or purchasers. The Company's inability to
 
                                      F-13
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(2) RECENT AND PENDING ASSET SALES AND DISCONTINUED OPERATIONS (CONTINUED)
consummate the sale to USF as planned in a timely manner could have a material
adverse effect on the Company's consolidated financial position and liquidity.
 
    In 1996, the Company engaged an investment banking and financial advisory
firm in which a Class A director has an ownership and management interest to
provide certain business consulting services to the Company, including analysis
and negotiation of potential business combination transactions to which the
Company might be a party. Under the terms of the engagement, the Company has
paid the investment banking firm retainer fees of approximately $162,000 through
December 31, 1996, and is obligated to pay additional fees in the event a
transaction is consummated by the Company. Additionally, the Company will be
obligated to pay such investment banking firm a total of approximately $220,000,
plus out-of-pocket expenses, in conjunction with the transaction with USF.
Further, the Company paid such investment banking firm approximately $207,500,
plus out-of-pocket expenses, in connection with USF's acquisition of an
unrelated entity, which was completed in February 1997. USF reimbursed the
Company $250,000 for certain expenses, including amounts that were paid to the
investment banking firm. Finally, in connection with the disposition of the
Company's oilfield services segment, the Company paid the investment banking
firm approximately $150,000, plus out-of-pocket expenses. The Company believes
that the terms of its arrangement with the investment banking firm are
consistent with industry standards for similar services.
 
(3) SALE OF GIBRALTAR
 
    After a period of continued operating losses, in light of management's
ongoing assessment of changed conditions in the hazardous waste market, and
considering the significance of Gibraltar's regulatory issues and future capital
requirements, in late 1993, the Company's senior management and Board of
Directors determined that the divestiture of Gibraltar was in the best interests
of the Company and its shareholders.
 
    On May 10, 1994, the Company executed a definitive agreement (the "Stock
Purchase Agreement") for the sale of all of the outstanding shares of common
stock of Gibraltar to American Ecology Corporation ("AEC"). Such agreement was
subsequently amended in an agreement dated September 2, 1994. The Company
completed the sale of Gibraltar to AEC pursuant to the Stock Purchase Agreement,
as amended, on December 31, 1994, and received cash of $5,500,000 from AEC. In
addition to the cash proceeds reflected above, AEC executed a note payable to
the Company in the amount of $550,000 to be held in escrow as a source of
payment of claims, if any, for which the Company indemnifies AEC under the Stock
Purchase Agreement (note 13).
 
    During 1993, as part of a restructuring of its hazardous waste business, the
Company recorded charges of $5,711,000 related to the abandonment and write-down
of certain of Gibraltar's assets and to reduce the net assets of Gibraltar to
their estimated net realizable value at December 31, 1993, determined primarily
based on the terms of the Stock Purchase Agreement. During 1994, the Company
recorded additional provisions for losses on the divestiture of Gibraltar of
$4,092,000 to further reduce the carrying value of Gibraltar's net assets. The
additional charges were necessitated by: (i) the settlement of litigation
against Gibraltar by the State of Texas involving its alleged violation of
environmental laws and regulations; (ii) Gibraltar's continuing losses prior to
the closing of the sale on December 31, 1994; (iii) the aforementioned amendment
to the Stock Purchase Agreement; (iv) certain indemnity obligations of the
Company to AEC relative to existing claims involving Gibraltar (note 13); and
(v) additional expenses related to the sale.
 
                                      F-14
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(3) SALE OF GIBRALTAR (CONTINUED)
    The change in the reserve for loss on sale of subsidiary for the years ended
December 31, 1996 and 1995, is summarized as follows (in thousands of dollars):
 
<TABLE>
<S>                                                                  <C>
Balance at December 31, 1994, included in accrued expenses.........  $   1,430
1995 expenditures related to Gibraltar indemnity obligations.......       (534)
                                                                     ---------
Balance at December 31, 1995, included in accrued expenses.........        896
1996 expenditures related to Gibraltar indemnity obligations.......       (492)
                                                                     ---------
Balance at December 31, 1996, included in accrued expenses.........  $     404
                                                                     ---------
                                                                     ---------
</TABLE>
 
    A summary of Gibraltar's results of operations for the year ended December
31, 1994, follows (in thousands of dollars):
 
<TABLE>
<S>                                                                  <C>
Revenues...........................................................  $  12,017
                                                                     ---------
                                                                     ---------
Gross profit (loss)................................................  $    (432)
                                                                     ---------
                                                                     ---------
Operating loss.....................................................  $  (3,664)
                                                                     ---------
                                                                     ---------
Net loss...........................................................  $  (4,012)
                                                                     ---------
                                                                     ---------
</TABLE>
 
    Included in the net loss of Gibraltar for the year ended December 31, 1994,
was $166,000, of intercompany overhead and interest charges assessed Gibraltar
by the Company.
 
(4) ASSET ACQUISITION AND BUSINESS EXPANSION
 
    On July 21, 1995, the Company acquired, pursuant to an asset purchase
agreement dated June 7, 1995, certain assets of a group of three affiliated
companies, including Romero Bros. Oil Exchange, Inc., Environmental Petroleum
Products Co./EPPCO, and Environmental Insight, Inc. The Texas and
Louisiana-based companies were involved in the collection and marketing of used
oils and oil filter collection and recycling. The asset purchase was effectuated
through a newly-formed, wholly-owned subsidiary of the Company, HTI. The
tangible assets acquired, consisting primarily of transportation equipment, were
recorded at their estimated fair market value of $500,000 and will be
depreciated over their estimated remaining useful lives. The total acquisition
cost of $1,536,000 included cash of approximately $786,000, including
acquisition-related costs, and the issuance of 500,000 shares of the Company's
Class A common stock. The purchase method of accounting has been used for this
asset acquisition; therefore, HTI's results of operations are consolidated with
the Company's since July 21, 1995. The excess of cost over fair market value of
net assets acquired amounted to $1,152,000, including $116,000 of deferred tax
liabilities for the basis difference in tangible assets. Such excess of cost
over fair market value of net assets acquired was written off in connection with
the decision to sell substantially all operating assets (note 2). Of the 500,000
shares of common stock issued, 300,000 of such shares are being held in escrow
pending the attainment of certain performance goals by HTI, including objectives
relating to operating profit and collected volumes of used oil and oil filters.
An additional 100,000 shares are being held by the Company as security for the
repayment of a $75,000 loan to the sellers.
 
                                      F-15
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(5) SALE OF INTEREST IN MEXICAN JOINT VENTURE
 
    On July 12, 1995, effective June 30, 1995, the Company executed an agreement
for the sale of its 25% interest in Pro Ambiente to Promotora de Servicios y
Proyectos Ecologicos, S.A. de C.V., owner of the remaining 75% of the joint
venture. Pro Ambiente is a Mexican corporation engaged in the collection and
blending of waste-derived fuels for use in cement kilns. The payment terms of
the sale were subsequently modified pursuant to an agreement dated August 11,
1995. Under the terms of the sale agreement, as amended, the Company received
cash proceeds of $1,324,000. As a result of the sale and other expenses
associated with its Mexican operations, the Company recorded losses totaling
$547,000 in the year ended December 31, 1995.
 
(6) PROPERTY, PLANT, AND EQUIPMENT
 
    Property, plant, and equipment, including $9,626,000 of property, plant, and
equipment, net, included in net assets of discontinued operations, consisted of
the following at December 31, 1996 and 1995 (in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                                      1996       1995
                                                                                    ---------  ---------
<S>                                                                                 <C>        <C>
Land..............................................................................  $     802  $     802
Buildings and improvements........................................................      1,862      1,588
Machinery and equipment...........................................................     26,514     19,168
Furniture, fixtures, and other....................................................        704        673
Construction in progress..........................................................         61      3,037
                                                                                    ---------  ---------
                                                                                       29,943     25,268
Less: Accumulated depreciation....................................................     14,414     12,431
    Valuation reserve.............................................................      5,673     --
                                                                                    ---------  ---------
Net property, plant, and equipment................................................  $   9,856  $  12,837
                                                                                    ---------  ---------
                                                                                    ---------  ---------
</TABLE>
 
    Depreciation expense totaled $2,523,000, $2,328,000, and $3,366,000 for the
years ended December 31, 1996, 1995, and 1994, respectively.
 
    The Company recorded a pre-tax charge of $392,000 during the 1995 fourth
quarter related to the write-down of an office building in Kilgore, Texas, to
its estimated net realizable value. Such amount is included in "other expense,
net" as a component of continuing operations in the accompanying consolidated
statements of operations for the year ended December 31, 1995. The property is
currently held for sale.
 
(7) NOTES PAYABLE
 
    The Company has a credit agreement, as amended, (the "Credit Agreement")
with Bank One, Texas, N.A. (the "Bank") that matures on March 31, 1997, that
provides up to $6,500,000 in available credit for the Company. Under the terms
of the Credit Agreement, the Company may borrow, subject to a defined borrowing
base, up to $4,000,000 under a revolving line of credit (including up to
$1,800,000 in letters of credit) for working capital and general corporate
purposes, and up to $2,500,000 under a term loan facility for purposes of
acquiring certain eligible equipment. The Credit Agreement is secured primarily
by accounts receivable and equipment.
 
                                      F-16
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(7) NOTES PAYABLE (CONTINUED)
    At December 31, 1996, the Company had borrowings of approximately $2,738,000
outstanding under the revolving line of credit and had approximately $1,179,000
in letters of credit outstanding. Interest on the revolving line of credit is
payable quarterly at the Bank's prime rate (8.875% at December 31, 1996). At
December 31, 1996, the Company had borrowed the full $2,500,000 available under
the term loan portion of the Credit Agreement, consisting of two notes in the
original amounts of $700,000 (payable quarterly over five years) and $1,800,000
(payable quarterly over seven years). Both notes bear interest at 8.25%. The
outstanding balance at December 31, 1996 was approximately $2,276,000 under the
term loan portion of the Credit Agreement.
 
    The Credit Agreement contains restrictive covenants which include the
maintenance of minimum tangible net worth, as defined, and certain financial
ratios. The Company has not been in compliance with certain covenant
requirements since June 30, 1996, placing the Company in technical default.
Consequently, the Company has classified the entire outstanding balance as a
current liability.
 
    In connection with the closing of the sale of the Company's oilfield
services segment in January 1997, the Company repaid $3,300,000 of outstanding
indebtedness under the Credit Agreement. On March 31, 1997, the Bank extended
the maturity date of the Credit Agreement to May 31, 1997, to accommodate the
anticipated closing date of the sale of the Company's waste management services
assets to USF. The Company's inability to consummate the sale to USF as planned
in a timely manner could have a material adverse effect on the Company's
consolidated financial position and liquidity.
 
(8) ACCRUED EXPENSES
 
    Accrued expenses consisted of the following at December 31, 1996 and 1995
(in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                                         1996       1995
                                                                                       ---------  ---------
<S>                                                                                    <C>        <C>
Accrued transaction costs and capital expenditures to be incurred prior to the sale
  of the waste management services segment (note 2)..................................  $     987  $  --
Insurance premiums and accrued claims payable........................................        696        742
Accrued expenses for estimated legal costs relating to Gibraltar
  (notes 3 and 13)...................................................................        404        896
Accrued restructuring expenses (note 2)..............................................        402     --
Salaries, wages, and benefits........................................................        258        591
Current portion of Gibraltar judgment (notes 3 and 13)...............................        167        167
Taxes other than income taxes........................................................        116        265
Accrued losses from operations of waste management services segment during phase-out
  period (note 2)....................................................................         43     --
Other................................................................................        648        952
                                                                                       ---------  ---------
                                                                                           3,721      3,613
                                                                                       ---------  ---------
Salaries, wages, and benefits........................................................        400     --
Taxes other than income taxes........................................................        210     --
Other................................................................................        491     --
                                                                                       ---------  ---------
Accrued expenses, included in net assets available for sale..........................      1,101     --
                                                                                       ---------  ---------
                                                                                       $   4,822      3,613
                                                                                       ---------  ---------
                                                                                       ---------  ---------
</TABLE>
 
                                      F-17
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(9) INCOME TAXES
 
    Income tax expense (benefit) for the years ended December 31, 1996, 1995,
and 1994, consisted of the following (in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                                  1996       1995       1994
                                                                                ---------  ---------  ---------
<S>                                                                             <C>        <C>        <C>
Deferred Federal income tax benefit from continuing operations................  $  --           (320)       (49)
                                                                                ---------  ---------  ---------
Deferred Federal income tax expense (benefit).................................       (698)      (151)       603
Deferred state income tax benefit.............................................     --         --             (7)
                                                                                ---------  ---------  ---------
  Income tax expense (benefit) from discontinued operations...................       (698)      (151)       596
                                                                                ---------  ---------  ---------
  Income tax expense (benefit)................................................  $    (698)      (471)       547
                                                                                ---------  ---------  ---------
                                                                                ---------  ---------  ---------
</TABLE>
 
    Income tax expense (benefit) differed from the amounts computed by applying
the U.S. Federal income tax rate of 34% to loss before income taxes as a result
of the following (in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                             1996       1995       1994
                                                                           ---------  ---------  ---------
<S>                                                                        <C>        <C>        <C>
Computed "expected" tax benefit..........................................  $  (3,717)      (658)    (1,206)
Change in the beginning-of-the-year balance of the valuation allowance
  for deferred tax assets................................................      3,198        364        608
Change in the beginning-of-the-year balance of the valuation allowance
  for deferred tax assets of Gibraltar...................................     --         --          1,007
Other, net...............................................................       (179)      (177)       138
                                                                           ---------  ---------  ---------
  Total income tax expense (benefit).....................................  $    (698)      (471)       547
                                                                           ---------  ---------  ---------
                                                                           ---------  ---------  ---------
</TABLE>
 
                                      F-18
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(9) INCOME TAXES (CONTINUED)
    The tax effects of temporary differences that give rise to significant
portions of the deferred tax assets and deferred tax liabilities at December 31,
1996 and 1995, are presented below (in thousands of dollars):
 
<TABLE>
<CAPTION>
                                                                                      1996       1995
                                                                                    ---------  ---------
<S>                                                                                 <C>        <C>
Deferred tax assets:
  Net operating loss carryforwards................................................  $   1,954      1,157
  Property, plant and equipment--basis differences and depreciation...............      1,985     --
  Accrued expenses, provisions for book not yet deductible for tax................        896        483
  Capital loss carryforward.......................................................        194        220
  Alternative minimum tax credit carryforward.....................................        134        134
  Other...........................................................................        137        108
                                                                                    ---------  ---------
    Total gross deferred tax assets...............................................      5,300      2,102
    Less valuation allowance......................................................     (5,300)    (2,102)
                                                                                    ---------  ---------
    Net deferred tax assets.......................................................  $  --         --
                                                                                    ---------  ---------
Deferred tax liabilities:
  Property, plant, and equipment--depreciation and basis differences..............  $  --            698
  Other...........................................................................        148        148
                                                                                    ---------  ---------
    Total gross deferred tax liabilities..........................................        148        846
                                                                                    ---------  ---------
    Net deferred tax liability....................................................  $     148        846
                                                                                    ---------  ---------
                                                                                    ---------  ---------
</TABLE>
 
    In assessing the realizability of deferred tax assets, management considers
whether it is more likely than not that some portion or all of the deferred tax
assets will not be realized. The ultimate realization of deferred tax assets is
dependent upon the generation of future taxable income during the periods in
which those temporary differences become deductible. Management considers the
scheduled reversal of deferred tax liabilities and projected future taxable
income in making this assessment. Subsequently recognized tax benefits relating
to the valuation allowance for deferred tax assets as of December 31, 1996, will
be included as an income tax benefit in the consolidated statement of operations
in future periods.
 
    At December 31, 1996, the Company has net operating loss carryforwards for
federal income tax purposes of approximately $5,100,000. Such amounts are
available to offset future Federal taxable income, if any, through 2011 and
expire in the following years: 2009--approximately $1,700,000;
2010--approximately $1,200,000; and 2011--approximately $2,200,000.
 
(10) LEASES
 
    The Company leases certain equipment and facilities used in its operations,
all of which have or will be assumed by Dawson and USF in connection with the
respective asset sales. Total rentals approximated $550,000, $330,000, and
$863,000 for the years ended December 31, 1996, 1995, and 1994, respectively.
Included in the total expense for the years ended December 31, 1994, are
$663,000, related to Gibraltar.
 
(11) EMPLOYEE BENEFIT PLANS
 
    RESTATED STOCK COMPENSATION PLAN--The Company has adopted the Restated Stock
Compensation Plan to provide for the grant of nonqualified options to
participating employees. An aggregate of 645,000
 
                                      F-19
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(11) EMPLOYEE BENEFIT PLANS (CONTINUED)
shares of Class A common stock has been authorized and reserved for issuance
under such plan. The plan is administered by the Compensation Committee of the
Board of Directors, which has the sole authority to interpret the plan, to
determine the persons to whom options will be granted, and to determine the
exercise price, duration, and other terms of options to be granted under the
plan, provided that options may not be granted at prices less than fair market
value on the dates of the grants and that options may not be outstanding for a
period longer than ten years from the date the options are granted.
 
    The following table summarizes activity under the Company's Restated Stock
Compensation Plan for the years ended December 31, 1996 and 1995:
 
<TABLE>
<CAPTION>
                                                                                    NUMBER OF    AVERAGE
                                                                                     OPTIONS      PRICE
                                                                                   -----------  ---------
<S>                                                                                <C>          <C>
Balance at December 31, 1994.....................................................     542,127   $  2.5861
  Granted........................................................................      84,000      0.5625
  Forfeited......................................................................     (30,000)     2.3319
                                                                                   -----------
Balance at December 31, 1995.....................................................     596,127      2.3138
  Granted........................................................................       3,500      1.2500
  Forfeited......................................................................     (31,954)     1.7161
                                                                                   -----------
Balance at December 31, 1996.....................................................     567,673      2.3408
                                                                                   -----------
                                                                                   -----------
Exercisable at December 31, 1996.................................................     345,140      2.5504
                                                                                   -----------
                                                                                   -----------
Exercisable at December 31, 1995.................................................     226,478      2.6545
                                                                                   -----------
                                                                                   -----------
</TABLE>
 
    The following table summarizes the Company's outstanding stock options at
December 31, 1996:
 
<TABLE>
<CAPTION>
                                   WEIGHTED
                                    AVERAGE      WEIGHTED
                    NUMBER OF      REMAINING      AVERAGE
RANGE OF EXERCISE    OPTIONS      CONTRACTUAL    EXERCISE
     PRICES        OUTSTANDING       LIFE          PRICE
- -----------------  -----------  ---------------  ---------
<S>                <C>          <C>              <C>
     $0.5625           73,500        9 years     $  0.5625
  $1.25 - $2.75       227,244        7 years        2.5470
  $2.00 - $2.75       240,000        6 years        2.4167
  $2.75 - $4.75        14,091        6 years        3.6667
      $6.00            12,838        6 years        6.0000
                   -----------
 $0.5625 - $6.00      567,673        7 years     $  2.3408
                   -----------
                   -----------
</TABLE>
 
                                      F-20
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(11) EMPLOYEE BENEFIT PLANS (CONTINUED)
    The following table summarizes the Company's exercisable stock options at
December 31, 1996:
 
<TABLE>
<CAPTION>
                    NUMBER OF
RANGE OF EXERCISE    OPTIONS    WEIGHTED AVERAGE
     PRICES        OUTSTANDING   EXERCISE PRICE
- -----------------  -----------  ----------------
<S>                <C>          <C>
     $0.5625           14,700      $   0.5625
  $1.25 - $2.75       140,896          2.5765
  $2.00 - $2.75       168,000          2.4167
  $2.75 - $4.75        11,272          3.6667
      $6.00            10,272          6.0000
                   -----------
 $0.5625 - $6.00      345,140      $   2.5504
                   -----------
                   -----------
</TABLE>
 
    The per-share weighted average fair value of stock options granted during
1996 and 1995 was not material. The Company applies APB 25 in accounting for the
plan and, accordingly, no compensation cost has been recognized for its stock
options in the consolidated financial statements. Had the Company determined
compensation cost based on the value at the grant date for its stock options
under SFAS 123, the Company's net loss and net loss per share for 1996 and 1995
would not have been affected. The full impact of calculating compensation costs
for stock options under SFAS 123 has not been considered because compensation
cost is reflected over the options' vesting period of five years and
compensation cost for options granted prior to January 1, 1995, is not
considered.
 
    1995 EMPLOYEE RESTRICTED STOCK PLAN--In January 1995, the Board of Directors
adopted the 1995 Employee Restricted Stock Plan (the "Restricted Plan"). The
Restricted Plan was approved by the shareholders in June 1995, at which time the
420,000 shares of Class A common stock available for issuance under the
Restricted Plan were issued to certain executive officers and senior managers of
the Company pursuant to the terms of the Restricted Plan. The shares granted
under the Restricted Plan vest 20% per year beginning in January 1995 with
provisions for earlier vesting based on increases in the Company's stock price.
 
    1996 NON-EMPLOYEE DIRECTOR STOCK OPTION PLAN--In December 1995, the Board of
Directors adopted, subject to shareholder approval, the 1996 Non-Employee
Director Stock Option Plan. Such plan replaced the Nonqualified Stock Option
Plan for Outside Directors, which as adopted in 1991. Directors who are not
employees of the Company are eligible to participate in the plan. Under the
terms of the plan, the exercise price of each option granted shall be equal to
the fair market value on the date of grant. Options become fully exercisable one
year from the date of grant, provided that such vesting period will be
accelerated upon the occurrence of a change of control. Options expire ten years
after the date of grant. A total of 90,000 shares of Class A common stock have
been reserved for issuance under the plan. Participants were granted, effective
December 6, 1995, options to purchase 15,000 shares of Class A common stock at
an exercise price equal to the fair market value at that date of $1.0625, of
which 5,000 shares vested immediately with the remainder vesting in equal
increments on the first and second anniversary dates of the grant. Upon the
election of any new outside directors, each such director shall be granted an
option to purchase 7,500 shares of Class A common stock. Thereafter, each
participant is to be granted an option to purchase 3,000 shares of Class A
common stock each date he or she is reelected as a director of the Company,
subject to share availability, adjustment for stock dividends, splits, and
similar events.
 
                                      F-21
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(11) EMPLOYEE BENEFIT PLANS (CONTINUED)
 
    MOBLEY EMPLOYEES' PROFIT SHARING PLAN--The Company has a contributory profit
sharing plan for the benefit of substantially all employees. Contributions to
the plan are made at the discretion of the Compensation Committee of the Board
of Directors and approximated $62,000, $51,000, and $96,000 for the years ended
December 31, 1996, 1995, and 1994, respectively. Included in the total
contributions for the year ended December 31, 1994, are approximately $39,000,
related to Gibraltar.
 
    MOBLEY ENVIRONMENTAL SERVICES, INC. EMPLOYEES' BENEFIT TRUST--The Company
has a medical benefit plan which is funded by employer and participant
contributions and is supplemented by stop-loss insurance. Contributions are
determined by the plan administrator based upon the actual claim experience and
administrative costs of the plan.
 
(12) STOCKHOLDERS' EQUITY
 
    The Company is authorized to issue up to 2,000,000 shares of preferred stock
(par value $.01), and the Board of Directors has the authority to fix the
rights, preferences, privileges, limitations, and restrictions of such stock. No
preferred stock has been issued as of December 31, 1996.
 
    Each share of the Company's Class A and Class B common stock is entitled to
one vote per share and ten votes per share, respectively. Each share of Class B
common stock is convertible into one share of Class A common stock at any time
at the option of the stockholder, and certain restrictions exist upon the
transfer of Class B common shares.
 
    In May 1996, the shareholders of the Company approved a one-for-two reverse
stock split of the Company's Class A and Class B common stock through approval
of an amendment to the Certificate of Incorporation of the Company, pursuant to
which each authorized and outstanding share of Class A common stock would have
been reclassified into one-half of a new share of Class A common stock and each
authorized and outstanding share of Class B common stock would have been
reclassified into one-half of a new share of Class B common stock (the "Reverse
Stock Split"). Subsequent to approval by the shareholders, the Board of
Directors determined that such action was not in the best interests of the
Company and its shareholders and elected not to effectuate the Reverse Stock
Split.
 
(13) COMMITMENTS AND CONTINGENCIES
 
    LETTERS OF CREDIT
 
    At December 31, 1996, letters of credit totaling approximately $1,012,000
had been provided by the Company to its insurance carrier in connection with its
workers' compensation, general liability, and auto liability insurance policies.
Additionally, the Company has provided a letter of credit to the Texas Natural
Resource Conservation Commission ("TNRCC") in the amount of approximately
$167,000 to secure the payment of fines assessed Gibraltar by the TNRCC in
connection with the December 1994 settlement of certain litigation.
 
    REGULATORY ENFORCEMENT ACTION AND LAWSUIT
 
    In November 1993, the State of Texas filed a lawsuit against Gibraltar
stemming from an enforcement action by the TNRCC alleging certain regulatory
violations. The lawsuit was subsequently amended to include certain notices of
violation issued by the TNRCC and allegations of noncompliance associated with
certain regulatory orders. In July 1994, this litigation was tentatively settled
through mediation and an
 
                                      F-22
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(13) COMMITMENTS AND CONTINGENCIES (CONTINUED)
Agreed Final Judgment was subsequently entered in December 1994. Under the terms
of the judgment, Gibraltar was obligated for $1,150,000 in assessed fines and
attorneys fees. Of such amount, $450,000 was paid by AEC and the Company is
responsible for payment of the remaining $700,000. As of December 31, 1996, the
Company had paid all but $167,000 of such amount, which is due in June 1997 and
included in "accrued expenses" in the December 31, 1996 consolidated balance
sheet (note 8).
 
    LITIGATION AND VARIOUS OTHER CLAIMS
 
    The Company continues to defend various claims resulting from the operations
of its former subsidiary, Gibraltar (the sale of which is discussed in note 3).
As of February 28, 1997, six such lawsuits were pending, one of which is
asserted as a class action. During the Company's ownership of Gibraltar,
Gibraltar engaged in the collection, transportation, analysis, treatment,
management, and disposal of various types of hazardous wastes. In the actions
pending against the Company and/or Gibraltar, the plaintiffs complain of a
variety of acts by Gibraltar which allegedly occurred in the course of its
operations, including improper air emissions, nuisance odors, contamination of
water supplies, and repeated and continuing violations of environmental laws. In
the various pending actions, plaintiffs assert similar theories as the alleged
basis for recovery, including negligence, nuisance, trespass, fraudulent
concealment, assault and battery, and international infliction of emotional
distress. Likewise, such plaintiffs seek similar types of damages, including
loss of property value and compensatory and punitive damages for personal injury
and property damage for nuisance odors, physical discomfort and impairment,
interference with use and enjoyment of property, medical expenses, mental
anguish, and loss of earning capacity. An additional claimant seeks permanent
closure of the facility and civil penalties as the remedy for alleged violations
by Gibraltar of environmental protection statutes and endangerment to public
health and the environment. While all of the six actions are technically
pending, in one such action, the Company has defended the subject claims in a
jury trial which resulted in inconsequential damages being awarded to the
plaintiffs on November 7, 1996. However, the verdict is subject to appeal in
accordance with the applicable rules of civil procedure.
 
    These matters raise difficult and complex factual and legal issues,
including but not limited to, the nature and amount of the Company's liability,
if any. Although the Company is a defendant in some litigation, in other matters
the Company's potential liability arises from material contractual
indemnifications given by the Company to the purchaser of Gibraltar. In
particular, in connection with the sale of Gibraltar, the Company made extensive
representations and warranties regarding Gibraltar and agreed to indemnify the
purchaser, AEC, for any breaches of such representations and warranties.
Additionally, the Company is obligated to indemnify AEC for certain claims
against Gibraltar arising from circumstances existing on or prior to the closing
of the sale, including various claims and proceedings disclosed to AEC. The
Company's indemnification obligations to AEC expired June 30, 1996, except in
the case of tax, environmental and ERISA claims, for which any claims for
indemnification must be asserted prior to June 30, 1998. These indemnifications
may include the potential liability of former customers of Gibraltar,
approximately 50 of which have also become defendants in litigation involving
Gibraltar's operations. The Company's contractual indemnity obligations to AEC
also encompass various pending regulatory and permit renewal proceedings. The
failure of Gibraltar to prevail in these matters could result in significant
liabilities to the Company.
 
    The Company has been notified by its insurance carrier that it disputes the
Company's interpretation of its pollution liability insurance coverage and
policy limitations applicable to the foregoing claims. While
 
                                      F-23
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(13) COMMITMENTS AND CONTINGENCIES (CONTINUED)
the Company is vigorously pursuing a favorable resolution of this dispute, it is
unable to determine the likelihood of an unfavorable outcome at this time.
 
    The Company, based on consultation with its legal counsel, believes that it
is probable that the Company will continue to incur certain costs associated
with the foregoing matters and accordingly, in connection with the divestiture
of Gibraltar in 1994, established an accrual for estimated out-of-pocket
expenses related to the ongoing administrative management of such matters (notes
3 and 8). However, the Company is currently unable to reasonably estimate its
potential exposure for defending such matters, any indemnity obligations
resulting therefrom, and any corresponding insurance reimbursement. As noted
above, the litigation matters to which the Company is a party raise several
difficult and complex factual and legal issues. More specifically: (i) while
certain of the plaintiffs exhibit apparent physical injury and a variety of
health problems, the requisite causal connection to Gibraltar's facilities or
operations has not been established; (ii) certain of the cases involve literally
hundreds of plaintiffs whose physical condition and medical history have not yet
begun to be investigated; (iii) although the Company has experienced some degree
of success recently in two separate jury trials, there is inherent uncertainty
associated with jury trials in cases such as these which tend to have a strong
emotional appeal; (iv) the extent of pollution liability insurance coverage
available to the Company for potential indemnity exposure and defense costs is
currently in dispute and is itself the subject of pending litigation as noted
previously; (v) the Company's potential liability relating to defense cost
claims of approximately 50 of Gibraltar's former customers who have also been
named in the litigation (and who are represented by over 20 different law firms)
is currently not determinable; and (vi) the indemnifications given to AEC in
connection with the Gibraltar sale are comprehensive and subject to broad
interpretation. Accordingly, the Company has not made an accrual for losses, if
any, which might result from these legal matters as such amounts or a range of
amounts are not currently reasonably estimatable. The Company's future financial
condition, results of operations, and liquidity could be materially adversely
affected as the nature and scope of the Company's ultimate liability arising
from Gibraltar's operations and sale become better defined.
 
    In January 1996, Mobley was notified by the TNRCC that it is a potentially
responsible party of the alleged release, during the early or mid-1980s, of
hazardous substances at the McBay Oil and Gas State Superfund Site located near
Grapeland, Texas. The Company has recorded an accrual for its estimated exposure
in connection with this matter, the amount of which is not material to the
consolidated financial statements.
 
    There are various other routine claims and legal actions pending and
threatened against the Company which are incidental to the Company's business
and have arisen in the ordinary course of its business related to services,
contracts, employment, and other matters. Where applicable, the Company has
recorded accruals for estimated potential damages and expenses associated with
such matters. While the final outcome of these matters cannot be predicted with
certainty, management, upon consultation with legal counsel, and considering the
Company's limited continuing activities, believes that financial obligations of
the Company arising from such claims could have a material adverse effect on its
consolidated financial condition, results of operations, or liquidity.
 
                                      F-24
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(14) SUPPLEMENTAL CASH FLOW INFORMATION
 
<TABLE>
<CAPTION>
                                                                          1996       1995       1994
                                                                        ---------  ---------  ---------
<S>                                                                     <C>        <C>        <C>
                                                                           (IN THOUSANDS OF DOLLARS)
Interest paid, net of amounts capitalized.............................  $     261  $      32  $     199
Noncash operating activities--provision for foreign currency
  translation loss....................................................     --            155        700
</TABLE>
 
    Included in the total interest paid for the year ended December 31, 1994, is
$12,000, related to Gibraltar.
 
(15) QUARTERLY FINANCIAL DATA (UNAUDITED)
 
    Summarized consolidated quarterly financial data for 1996, 1995, and 1994 is
as follows (in thousands of dollars, except per share amounts):
 
<TABLE>
<CAPTION>
                                                                       QUARTER
                                                      ------------------------------------------
                                                         1ST      2ND(1)     3RD(2)     4TH(3)
                                                      ---------  ---------  ---------  ---------
<S>                                                   <C>        <C>        <C>        <C>
1996
Revenues............................................  $   4,507  $   4,670  $   5,751  $   6,652
Gross profit........................................        901      1,105      1,221      1,106
Operating loss......................................       (690)      (284)    (1,056)      (212)
Net income (loss)...................................       (672)      (491)    (9,117)        45
Net income (loss) per common share..................      (0.08)     (0.06)     (1.03)      0.01
 
1995
Revenues............................................  $   4,206  $   4,763  $   4,904  $   4,715
Gross profit........................................      1,487      1,603      1,630      1,011
Operating income (loss).............................        117        142        195     (1,758)
Net income (loss)...................................         81       (254)       233     (1,523)
Net income (loss) per common share(4)...............       0.01      (0.03)      0.03      (0.17)
 
1994
Revenues............................................  $   6,955  $   7,273  $   7,100  $   8,182
Gross profit........................................      1,460      1,616      1,288      1,730
Operating income (loss).............................         63     (2,394)       159     (1,217)
Net income (loss)...................................         98     (2,452)        79     (1,820)
Net income (loss) per common share..................       0.01      (0.31)      0.01      (0.23)
</TABLE>
 
- ------------------------
 
(1) Second quarter 1994 results of operations include a charge of $2,470,000
    related to an additional provision for loss on the divestiture of Gibraltar.
 
(2) Third quarter 1996 results of operations include charges of $7,952,000
    related to provisions for loss on disposal and provision for losses during
    phase-out period of waste management services segment. In addition, charges
    of $650,000 related to restructuring expenses including employee severance
    obligations, costs associated with the relocation and recruitment of
    personnel, and other related expenses are included in third quarter 1996
    results of operations.
 
                                      F-25
<PAGE>
              MOBLEY ENVIRONMENTAL SERVICES, INC. AND SUBSIDIARIES
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
(15) QUARTERLY FINANCIAL DATA (UNAUDITED) (CONTINUED)
(3) Fourth quarter 1995 results of operations include certain nonrecurring
    expenses totaling $1,162,000, including insurance accruals, severance
    expenses, relocation expenses, legal and consulting expenses, and a
    write-down of the carrying value of an office building to its estimated net
    realizable value.
 
    Fourth quarter 1994 results of operations include a charge of $1,622,000 for
    certain estimated liabilities in connection with the Company's indemnity
    obligations related to the sale of Gibraltar.
 
(4) The sum of the 1995 quarterly per share amounts does not equal the per share
    amount for the year due to the effect of the issuance of common stock on the
    weighted average number of common shares outstanding.
 
                                      F-26
<PAGE>
                      MOBLEY ENVIRONMENTAL SERVICES, INC.
 
                HISTORICAL AND PRO FORMA SELECTED FINANCIAL DATA
 
    The following table sets forth, for the periods indicated, (i) certain
historical financial information of the Company and (ii) certain pro forma
financial information of the Company after giving effect to the sale of the
Assets of the Company's hydrocarbon recycling and recovery business as
contemplated by the Transaction and the sale of its oilfield services assets
which was completed on January 20, 1997. This information should be read in
conjunction with the Consolidated Financial Statements and notes thereto set
forth at pages F-1 to F-26. The information presented herein is not necessarily
indicative of the financial position or operating results that would have
occurred had the Transaction been completed on the date as of which, or at the
beginning of periods for which, the Transaction is being given effect nor is it
necessarily indicative of future operating results or financial position. All
dollar amounts are in thousands, except per share data.
 
<TABLE>
<CAPTION>
                                                                   HISTORICAL
                                             ------------------------------------------------------   PRO FORMA
                                                                                                     ------------
                                                            YEARS ENDED DECEMBER 31,                  YEAR ENDED
                                             ------------------------------------------------------  DECEMBER 31,
                                               1996       1995       1994        1993       1992         1996
                                             ---------  ---------  ---------  ----------  ---------  ------------
<S>                                          <C>        <C>        <C>        <C>         <C>        <C>
INCOME STATEMENT DATA:
Revenues...................................  $  21,580  $  18,588  $  29,510  $   35,618  $  43,130   $   --
Operating income (loss)....................     (1,166)    (1,304)    (3,389)    (12,129)     3,829       (1,166)
Net income (loss) from continuing
  operations...............................     (1,286)    (1,463)    (4,095)    (10,111)     2,530       (1,286)
Net income (loss)..........................    (10,235)    (1,463)    (4,095)    (10,111)     2,530       (1,286)
 
BALANCE SHEET DATA:
Working capital (deficit)..................     (7,471)       (95)     2,646       6,162      7,435        4,472
Total assets...............................     11,983     19,097     22,252      22,081     35,346       11,042
Long-term debt, excluding current
  maturities...............................     --            490     --             853        473       --
Total stockholders' equity.................      2,467     12,606     12,373      17,156     27,023        5,251
 
PER SHARE DATA:
Net income (loss)..........................      (1.16)     (0.17)     (0.52)      (1.28)       .32        (0.15)
Book value.................................       0.28       1.50       1.56        2.17       3.40         0.59
</TABLE>
 
- ------------------------
 
    - Years prior to 1995 include results of operations of Gibraltar Chemical
      Resources, Inc., which was sold effective December 31, 1994.
 
    - Year ended December 31, 1995 includes results of acquired businesses from
      date of acquisition.
 
                                      S-1
<PAGE>
                      MOBLEY ENVIRONMENTAL SERVICES, INC.
 
            UNAUDITED PRO FORMA CONSOLIDATED CONDENSED BALANCE SHEET
 
                               DECEMBER 31, 1996
                             (DOLLARS IN THOUSANDS)
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                                            PRO FORMA
                                                                             HISTORICAL    ADJUSTMENTS    PRO FORMA
                                                                             -----------  -------------  -----------
<S>                                                                          <C>          <C>            <C>
Current assets:
  Cash and cash equivalents................................................   $     385       (a) 4,662       1,747
                                                                                            (c) (3,300)
  Receivables..............................................................         161        --               161
  Prepaid expenses and other current assets................................         207        --               207
  Investment in U.S. Filter common stock...................................          --       (b) 8,000       8,000
  Net assets of discontinued operations--current...........................       1,144      (a)  (532)      --
                                                                                             (b)  (612)
                                                                             -----------  -------------  -----------
    Total current assets...................................................       1,897           8,218      10,115
Property, plant and equipment, net.........................................         230        --               230
Net assets of discontinued operations--non-current.........................       9,659     (a) (1,846)      --
                                                                                            (b) (7,813)
Other assets, net..........................................................         197       (a)   500         697
                                                                             -----------  -------------  -----------
                                                                              $  11,983           (941)      11,042
                                                                             -----------  -------------  -----------
                                                                             -----------  -------------  -----------
 
                                        LIABILITIES AND STOCKHOLDERS' EQUITY
 
Current liabilities:
  Current portion of long-term debt........................................   $   5,014     (c) (3,300)       1,714
  Accounts payable.........................................................         633        --               633
  Accrued expenses.........................................................       3,721      (b)  (425)       3,296
                                                                             -----------  -------------  -----------
    Total current liabilities..............................................       9,368         (3,725)       5,643
Deferred income taxes......................................................         148        --               148
Stockholders' equity.......................................................       2,467       (a) 2,784       5,251
                                                                             -----------  -------------  -----------
                                                                              $  11,983           (941)      11,042
                                                                             -----------  -------------  -----------
                                                                             -----------  -------------  -----------
</TABLE>
 
                                      S-2
<PAGE>
                      MOBLEY ENVIRONMENTAL SERVICES, INC.
 
 UNAUDITED PRO FORMA CONSOLIDATED CONDENSED STATEMENT OF CONTINUING OPERATIONS
 
                          YEAR ENDED DECEMBER 31, 1996
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                                         PRO FORMA
                                                                           HISTORICAL   ADJUSTMENTS   PRO FORMA(1)
                                                                           ----------  -------------  -------------
<S>                                                                        <C>         <C>            <C>
Revenues.................................................................  $   --        $  --         $   --
Cost of revenues.........................................................      --           --             --
                                                                           ----------       ------    -------------
    Gross profit.........................................................      --           --             --
Selling, general, and administrative expenses............................         516       --                 516
Restructuring expenses...................................................         650       --                 650
                                                                           ----------       ------    -------------
    Operating loss.......................................................      (1,166)      --              (1,166)
Other expense............................................................        (120)      --                (120)
                                                                           ----------       ------    -------------
    Loss from continuing operations......................................  $   (1,286)   $  --         $    (1,286)
                                                                           ----------       ------    -------------
                                                                           ----------       ------    -------------
Loss per share from continuing operations................................  $    (0.15)   $  --         $     (0.15)
                                                                           ----------       ------    -------------
                                                                           ----------       ------    -------------
Weighted average number of common shares outstanding.....................   8,835,293                    8,835,293
                                                                           ----------                 -------------
                                                                           ----------                 -------------
</TABLE>
 
- ------------------------
 
(1) The Company anticipates that its ongoing general and administrative expenses
    will be reduced to approximately $300,000 annually upon completion of the
    Transaction, and expects earnings from investments to largely offset such
    costs. Such amount is based on current estimates and actual amounts could
    differ from those estimates.
 
                                      S-3
<PAGE>
                      MOBLEY ENVIRONMENTAL SERVICES, INC.
 
                   NOTES TO UNAUDITED PRO FORMA CONSOLIDATED
                         CONDENSED FINANCIAL STATEMENTS
 
    The following adjustments have been reflected in the accompanying Unaudited
Pro Forma Consolidated Financial Statements as of and for the year ended
December 31, 1996, after giving effect to the sales of the assets of the
Company's waste management services and oilfield services segments as if such
transactions had occurred at December 31, 1996 (in thousands of dollars):
 
    (a) To reflect the receipt of consideration from the sale of the assets of
the oilfield services segment as follows:
 
<TABLE>
<S>                                                           <C>
Sales price per Definitive Agreement........................  $   5,417
Consideration received in the form of a note receivable.....       (500)
Accrued transaction expenses................................       (255)
                                                              ---------
  Net cash proceeds.........................................  $   4,662
                                                              ---------
                                                              ---------
Gain on sale of oilfield services segment...................  $   2,784
                                                              ---------
                                                              ---------
Depreciated cost of net assets of oilfield services segment
  as of December 31, 1996...................................  $   2,378
                                                              ---------
                                                              ---------
</TABLE>
 
    (b) To reflect the receipt of consideration from the sale of the assets of
the waste management services segment as follows:
 
<TABLE>
<S>                                                           <C>
Sales price per Asset Purchase Agreement (fixed portion)....  $   8,000
                                                              ---------
                                                              ---------
Estimated net realizable value of net assets of waste
  management services segment as of December 31, 1996.......  $   8,425
                                                              ---------
                                                              ---------
</TABLE>
 
    (c) To reflect a $3,300,000 payment of outstanding bank indebtedness after
closing of the sale of the oilfield services segment.
 
                                      S-4
<PAGE>
                                                                         ANNEX A
 
                                     [LOGO]
 
G. CLYDE BUCK
MANAGING DIRECTOR
 
                               February 10, 1997
 
PERSONAL AND CONFIDENTIAL
 
Board of Directors
Mobley Environmental Services, Inc.
4415 E. Greenwood
Baytown, Texas 77520
 
Gentlemen:
 
    You have advised Rauscher Pierce Refsnes, Inc. ("RPR") that U.S. Filter
Corporation ("U.S. Filter") has proposed to purchase the waste management
segment of Mobley Environmental Services, Inc. ("Mobley") for a price of (a)
approximately $8.0 million in shares of U.S. Filter common stock plus (b) an
"earn-out" opportunity for an addition of up to approximately $4.0 million in
U.S. Filter common stock. You have requested that RPR issue an opinion
("Opinion") as to the fairness from a financial point of view to the common
stockholders of Mobley of the terms of the proposed transaction as set forth in
the draft Purchase Agreement dated February 5, 1997.
 
    RPR, as part of its investment banking business, is continually engaged in
the valuation of businesses and their securities in connection with mergers and
acquisitions, negotiated underwritings, secondary distributions of listed and
unlisted securities, private placements, and valuations for estate, corporate
and other purposes.
 
    In arriving at our opinion, we have, among other things:
 
        1.  Reviewed draft Purchase Agreement dated February 5, 1997 with U.S.
    Filter;
 
        2.  Reviewed proposal letter dated October 28, 1996 with U.S. Filter;
 
        3.  Reviewed Mobley's annual report and Form 10-K for the years ended
    December 31, 1995, 1994, 1993, 1992 and 1991, with financial statements
    audited by KPMG Peat Marwick L.L.P.;
 
        4.  Reviewed Mobley's Form 10-Q quarterly reports for the periods ended
    9/30/96, 6/30/96, 3/31/96, 9/30/95, 6/30/95 and 3/31/95;
 
        5.  Reviewed U.S. Filter's Form 10-K and annual reports for the fiscal
    years ended March 31, 1996 and 1995;
 
        6.  Reviewed U.S. Filter's Form 10-Q and 2nd quarter shareholder report
    dated September 30, 1996;
 
        7.  Reviewed an article on U.S. Filter in the December 16, 1996 issue of
    FORBES magazine (pages 42-43);
 
        8.  Reviewed a research report on U.S. Filter dated September 17, 1996
    prepared by Alex. Brown & Sons;
<PAGE>
Mobley Environmental Services, Inc.
February 10, 1997
Page 2
 
        9.  Reviewed a research report on U.S. Filter dated September 17, 1996
    prepared by Raymond James & Associates;
 
        10. Reviewed a research report on U.S. Filter dated September 20, 1996
    prepared by VALUE LINE;
 
        11. Reviewed selected publicly traded environmental companies;
 
        12. Reviewed selected publicly traded water-related companies (perhaps
    comparable to U.S. Filter);
 
        13. Reviewed selected environmental service company acquisitions during
    1995-1996;
 
        14. Considered such other information, financial studies, analyses and
    investigations as we deemed relevant under the circumstances; and
 
        15. Discussed with management of Mobley the outlook for future operating
    results, the assets and liabilities of the Company's waste management
    segment, material in the foregoing documents, and other matters we
    considered relevant to our inquiry.
 
    In our review and in arriving at our opinion, we have, with your permission,
(i) not independently verified any of the foregoing information and have relied
upon its being complete and accurate in all material respects and (ii) not made
an independent evaluation or appraisal of specific assets of Mobley. Our opinion
is provided to you pursuant to the terms of our engagement letter dated December
6, 1996.
 
    Based upon and subject to the foregoing, it is our opinion that, as of the
date hereof, the consideration to be received pursuant to the proposed
transaction is fair to the common stockholders of Mobley from a financial point
of view.
 
                                          RAUSCHER PIERCE REFSNES, INC.
 
                                          By: /s/  G. CLYDE BUCK
 
                                             -----------------------------------
 
                                          G. Clyde Buck
                                             MANAGING DIRECTOR


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