THERMO PROCESS SYSTEMS INC
8-K, 1995-02-21
TESTING LABORATORIES
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C.  20549

                   ___________________________________________


                                    FORM 8-K

                                 CURRENT REPORT



                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934



                                 Date of Report
                       (Date of earliest event reported):

                                February 6, 1995

                    ________________________________________


                           THERMO PROCESS SYSTEMS INC.
             (Exact name of Registrant as specified in its charter)


   Delaware                        1-9549                           04-2925807
   (State or other             (Commission                    (I.R.S. Employer
   jurisdiction of             File Number)             Identification Number)
   incorporation or
   organization)


   12068 Market Street                                                   48150
   Livonia, Michigan                                                (Zip Code)
   (Address of principal executive offices)


                                 (617) 622-1000
                         (Registrant's telephone number
                              including area code)
PAGE
<PAGE>




   Item 2.  Acquisition or Disposition of Assets
            ------------------------------------

        On February 6, 1995, Thermo Process Systems Inc. (the "Company")
   acquired all of the issued and outstanding capital stock of Engineering,
   Technology and Knowledge Corporation ("ETKC") from Nord Est S.A., a French
   industrial company ("Nord Est"). ETKC's sole subsidiary, Elson T. Killam
   Associates, Inc. ("Killam Associates"), is a leading provider of
   comprehensive environmental consulting and professional engineering
   services in New Jersey, Pennsylvania, Ohio and New York.

        The purchase price for ETKC's stock was $12.5 million in cash and a
   zero coupon promissory note with a face value of $28 million and a present
   value of $22.3 million, payable in February and May, 1998. The purchase
   price is subject to a post-closing adjustment, and will either be (i)
   increased by the amount by which ETKC's net tangible book value as of
   January 29, 1995 exceeds $9,920,000; or (ii) decreased by the amount by
   which $9,920,000 exceeds ETKC's net tangible book value as of such date.
   In addition, the Company has guaranteed the payment by ETKC and/or Killam
   Associates of approximately $1.7 million in indebtedness. The Company has
   also agreed to pay, after the third anniversary date of the closing, an
   amount equal to 30% of the amount by which ETKC's cumulative net income for
   the three-year period ending on such anniversary, after taxes, depreciation
   and goodwill, exceeds $13 million.

        In a related transaction, certain members of Killam Associates' senior
   management (the "Killam Management") exchanged outstanding options to
   purchase shares of Killam Associates' capital stock for options to purchase
   an aggregate of 847,678 shares of the Company's common stock. Additional
   options to purchase shares of Killam Associates' capital stock were
   canceled in exchange for cash payments to the Killam Management in the
   aggregate amount of approximately $1.9 million.

        The acquisition was made pursuant to a Stock Purchase and Sale
   Agreement (the "Agreement") entered into on February 6, 1995, to be
   effective as of January 29, 1995, among the Company, Nord Est and the
   Killam Management. The purchase price was based on the Company's
   determination of the fair market value of Killam Associate's business, and
   the terms of the Agreement were determined by arms' length negotiation
   among the parties.

        The Company has no present intention to use ETKC's plant, equipment or
   other assets for purposes materially different from the purposes for which
   such assets were used prior to the acquisition. However, the Company will
   review ETKC's business and assets, corporate structure, capitalization,
   operations, properties, policies, management and personnel and, upon
   completion of this review, may develop alternative plans or proposals,
   including mergers, transfers of a material amount of assets or other
   transactions or changes relating to such business.

        ETKC had consolidated gross revenues and operating profits (before
   non-recurring items, interest and taxes) of approximately $40.2 million and
   $3.4 million, respectively, for the year ended December 31, 1993. ETKC's
   consolidated gross revenues and operating profits are estimated to be $42.0
   million and $5.6 million, respectively, for the year ended December 31,
   1994.




                                        2
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<PAGE>




   Item 2.  Acquisition or Disposition of Assets (continued)

        The Company borrowed the cash portion of the purchase price, including
   cash used to collateralize the promissory note delivered to Nord Est, from
   Thermo Electron Corporation pursuant to a $38 million promissory note due
   June 1, 1997. Thermo Electron Corporation indirectly owns approximately 80%
   of the outstanding capital stock of the Company.


   Item 7.  Financial Statements, Pro Forma Combined Condensed Financial
            Information and Exhibits

            (a) Financial Statements of Business Acquired: as it is
                impracticable to file such information at this time, it will
                be filed by amendment on or prior to April 21, 1995.

            (b) Pro Forma Combined Condensed Financial Information: as it is
                impracticable to file such information at this time, it will
                be filed by amendment on or prior to April 21, 1995.

            (c) Exhibits

                1. Stock Purchase and Sale Agreement made and entered into on
                   February 6, 1995, to be effective as of January 29, 1995,
                   by and between Nord Est S.A., Thermo Process Systems Inc.,
                   and Emil C. Herkert, Kenneth L. Zippler, Franklin O.
                   Williamson, Jr., Fletcher N. Platt, Jr., Eugene J.
                   Destefano, Meint Olthof and Stanley P. Kaltnecker, Jr.

                2. $28,000,000 Secured Promissory Note dated as of January
                   29, 1995 issued by Thermo Process Systems Inc. to Nord Est
                   S.A.

                3. $38,000,000 Promissory Note dated as of February 21, 1995
                   issued by Thermo Process Systems Inc. to Thermo Electron
                   Corporation.























                                        3
PAGE
<PAGE>




                                   SIGNATURES


        Pursuant to the requirements of the Securities Exchange Act of 1934,
   the Registrant has duly caused this report to be signed on its behalf by
   the undersigned thereunto duly authorized, on this 21st day of February
   1995.



                                             THERMO PROCESS SYSTEMS INC.


                                             /s/ Paul F. Kelleher     
                                             Paul F. Kelleher
                                             Chief Accounting Officer



























































                        STOCK PURCHASE AND SALE AGREEMENT




                                  by and among 




                                  Nord Est S.A.
                                  (as Seller),

                           Thermo Process Systems Inc.
                                   (as Buyer)

                                       and

                                 Emil C. Herkert
                               Kenneth L. Zippler
                           Franklin O. Williamson, Jr.
                             Fletcher N. Platt, Jr.
                               Eugene J. Destefano
                                  Meint Olthof
                           Stanley P. Kaltnecker, Jr.
                           (collectively, Management)




                        Effective as of January 29, 1995
PAGE
<PAGE>







                        STOCK PURCHASE AND SALE AGREEMENT

             This Stock Purchase and Sale Agreement is made and entered
        into on February 6, 1995, to be effective as of January 29, 1995,
        by and between Nord Est S.A., a French societe anonyme (the
        "Seller"), Thermo Process Systems Inc., a Delaware corporation
        (the "Buyer"), and Emil C. Herkert, Kenneth L. Zippler, Franklin
        O. Williamson, Jr., Fletcher N. Platt, Jr., Eugene J. Destefano,
        Meint Olthof and Stanley P. Kaltnecker, Jr. (such individuals,
        individually and collectively, "Management").


                                   WITNESSETH:

             WHEREAS, Seller owns 100% of the issued and outstanding
        shares (the "Shares") of the capital stock of Engineering
        Technology and Knowledge Corporation, a Delaware corporation
        ("ETKC"); 

             WHEREAS, ETKC owns 100% of the issued and outstanding shares
        of the capital stock of Elson T. Killam Associates, Inc., a New
        Jersey corporation ("Killam"); 

             WHEREAS, Buyer wishes to purchase, and Seller wishes to
        sell, the Shares, upon the terms and conditions herewith set
        forth below; and

             WHEREAS, Management collectively own options to purchase
        shares of the capital stock of Killam representing, in the
        aggregate, 1,590 shares of the outstanding capital stock of
        Killam, and Buyer also wishes to make or cause to be made payment
        to Management in cancellation of certain of such options, and
        exchange the remaining portion of such options for options to
        acquire common stock of Buyer; 

             NOW, THEREFORE, in consideration of the premises and the
        mutual covenants, agreements and provisions herein contained, the
        parties hereto, intending to be legally bound, agree as follows:


                                    ARTICLE 1

                           PURCHASE AND SALE OF SHARES

             Section 1.1.  Delivery of Outstanding Shares.  At the
        Closing (as defined in Section 2.1 hereof), and subject to the
        terms and conditions contained in this Agreement, Seller shall
        transfer to Buyer and Buyer shall acquire from Seller, effective
        as of the close of business on January 29, 1995 (the "Effective
        Date"), all right, title and interest in and to the Shares, free
        and clear of all liens, encumbrances, charges, equities or
        restrictions.

                                        1
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<PAGE>






             Section 1.2.  Purchase Price.  In exchange for the Shares,
        and subject to the terms and conditions contained in this
        Agreement, Buyer shall:

                  (a)   pay to Seller at the Closing $12,500,000 in cash
        (the "ETKC Cash Consideration"), plus interest on $34,800,000
        from the Effective Date through the date of the Closing (the
        "Closing Date"); and

                  (b)  deliver to Seller at the Closing Buyer's
        promissory note, in the form set forth as Exhibit A to this
        Agreement (the "Note"), representing the obligation of Buyer to
        pay to Seller $28,000,000 in cash, net of any withholding
        obligation.  

             Section 1.3.  Adjustment to the Purchase Price. 

                  (a)  Within 90 days after the Closing Date, Buyer and
        Seller shall jointly prepare a consolidated balance sheet of ETKC
        and its subsidiaries as of the Effective Date (the "Effective
        Date Balance Sheet").  The Purchase Price, as defined below,
        shall then be either (i) increased by the amount by which the Net
        Tangible Book Value of ETKC (as defined below) as calculated from
        the Effective Date Balance Sheet exceeds $9,920,000; or (ii)
        decreased by the amount by which $9,920,000 exceeds the Net
        Tangible Book Value of ETKC as calculated from the Effective Date
        Balance Sheet (such amount, as the case may be, the "Price
        Adjustment").  

                  (b)  Within 10 days after determination of the Price
        Adjustment, Buyer or Seller, as the case may be, shall pay the
        amount thereof to the other, by certified or bank check in New
        York Clearing House Funds or by wire transfer to such account as
        the recipient may specify, together with interest from the
        Effective Date, calculated at a rate equal to the rate announced
        from time to time by First National Bank of Boston as its "base
        rate" (or the legal rate of interest, if lower).

                  (c)  If Buyer and Seller are unable to agree to the
        Price Adjustment by the close of business on the 90th day after
        the Closing Date, then the parties shall retain Arthur Andersen
        L.L.P. to resolve any dispute between them and the Price
        Adjustment determined by Arthur Andersen L.L.P. shall be binding
        upon the parties.  Buyer and Seller shall each be responsible for
        one-half of Arthur Andersen L.L.P.'s fees and expenses.  

                  (d)  For purposes of this Agreement, the term "Net
        Tangible Book Value of ETKC" shall be determined in accordance
        with generally accepted accounting principles consistently
        applied (except that in determining such book value, no provision
        shall be included for a general tax reserve) and shall be defined
        as (i) the consolidated shareholder's equity of ETKC and its
        subsidiaries as of December 31, 1993, plus (ii) the net income of

                                        2
PAGE
<PAGE>





        ETKC and its subsidiaries for the period beginning on January 1,
        1994 and ending as of the close of business on the Effective Date
        (before taking into account any charge for compensation expense
        or other costs or expenses related to Killam's stock option
        program (including without limitation payments made in respect of
        the cancellation of options currently outstanding under such
        stock option program), the Buyer Options, as such term is defined
        below, contemplated to be issued in place of the options
        outstanding under Killam's stock option program, any of the
        transactions contemplated in Section 4.9 hereof and charges for
        post-retirement healthcare costs), less (iii) goodwill on the
        consolidated balance sheet of ETKC and its subsidiaries as of the
        Effective Date, less (iv) the amount reflected on such balance
        sheet for the "building option" at the Effective Date, less (v)
        $1,500,000 (representing an amount agreed by Seller and Buyer to
        equal the anticipated costs of ETKC's future post-retirement
        health care obligations as of the Effective Date).  For purposes
        of determining the Net Tangible Book Value of ETKC, there shall
        be accrued on the Effective Date Balance Sheet cash bonuses
        payable to management personnel of Killam and its Subsidiaries,
        including Management, in the amount of $700,000 for the period
        from January 1, 1994 through December 31, 1994 and $30,000 for
        the period from January 1, 1995 through and including the
        Effective Date.  In addition, certain fees and expenses incurred
        in connection with the consummation of the transactions
        contemplated hereby, including without limitation certain
        payments to be made to Management pursuant to that certain Letter
        Agreement dated January 24, 1995 among Management and Seller (the
        "Letter Agreement"), fees and expenses payable to Gerschel &
        Company, Inc., Compagnie Financiere de Paribas or its affiliates
        and Environmental Financial Consulting Group, as well as certain
        legal fees and expenses, may be paid by ETKC or its subsidiaries
        on or before the Closing Date as Seller in its discretion may
        determine; provided, however, that such fees and expenses shall
        be accrued for in the Effective Date Balance Sheet.  

                  (e)  Any adjustments made pursuant to this Section 1.3
        shall not be charged against the deductible described in Section
        5.3(a).
         
             Section 1.4.  Earn-Out.  Buyer shall pay, as soon as
        practicable after the third anniversary of the Effective Date,
        and in any event within 90 days after such third anniversary, (a)
        to Seller, an amount, net of any withholding obligation, equal to
        24% of the amount by which ETKC's cumulative net income for the
        three-year period ending on such third anniversary exceeds
        $13,000,000 and (b) to Management, an amount, net of any
        withholding obligation, equal to 6% of the amount by which ETKC's
        cumulative net income for the three-year period ending on such
        third anniversary exceeds $13,000,000 (such payments,
        collectively, the "Earn-Out").  For purposes of this Agreement,
        ETKC's "net income" shall mean the net income of ETKC and its
        subsidiaries, or their successors-in-interest, earned from the
        business operated by ETKC as of the Effective Date (the

                                        3
PAGE
<PAGE>





        "Business") (excluding income from extraordinary transactions),
        as measured in accordance with Buyer's usual accounting
        procedures consistently applied, after taxes, depreciation,
        goodwill (including goodwill associated with the acquisition of
        ETKC by Buyer) and payment of the annual management fee to Thermo
        Electron Corporation, Buyer's parent corporation ("Thermo
        Electron"), in an amount not to exceed 1.5% of ETKC's gross
        revenues per year; provided that such accounting procedures are
        consistent with generally accepted accounting principles.  

             Section 1.5.  Cancellation and Exchange of Killam Options.
        At the Closing, and subject to the terms and conditions contained
        in this Agreement, Management shall (i) cancel options to
        purchase that number of shares of the capital stock of Killam as
        is set forth opposite such member of Management's name in Column
        1 of Schedule 1.5 hereto (the "Killam Canceled Options"), and
        (ii) execute and deliver to Buyer an option exchange agreement in
        the form of Exhibit B hereto ("Option Agreement"), pursuant to
        which each member of Management will exchange the number of
        options to purchase shares of Killam's capital stock set forth
        opposite such member of Management's name in Column 2 of Schedule
        1.5 hereto (the "Killam Options") for options to purchase such
        number of shares of Buyer's common stock, $.10 par value per
        share, as is set forth opposite such member of Management's name
        in Column 3 of Schedule 1.5 hereto (the "Buyer Options").  In
        exchange for the Killam Canceled Options, Buyer agrees to pay
        Killam at the Closing and cause Killam to pay to Management, the
        day following  the Closing, in cash, the amount set forth
        opposite such member of Management's name in Column 4 of Schedule
        1.5 hereto (the "Killam Cash Consideration").


                                    ARTICLE 2

                                     CLOSING

             Section 2.1.  Time and Place of Closing.  The closing of the
        transactions contemplated by this Agreement (the "Closing") shall
        take place immediately upon the execution of this Agreement by
        all of the parties hereto.

             Section 2.2.  Action to be Taken by Buyer at the Closing.
        At the Closing, in addition to the taking of such other action as
        may be provided in this Agreement, Buyer shall (i) deliver the
        ETKC Cash Consideration and the Note (collectively, the "Purchase
        Price") to Seller, (ii) execute and deliver a custody agreement
        in the form of Exhibit C hereto (the "Custody Agreement"), (iii)
        execute and deliver a pledge agreement in the form of Exhibit C-2
        (the "Pledge Agreement") (iv) deliver to the custodian under the
        Custody Agreement (the "Custodian") a U.S. Treasury security the
        material economic terms of which are identical to those of the
        Note, together with a stock power executed in blank with
        signature guarantees in proper form for the transfer of such
        security, as security for the payment of the Note by Buyer, (v)

                                        4
PAGE
<PAGE>





        deliver the Killam Cash Consideration to Killam (vi) execute and
        deliver to Management an amendment in the form of Exhibit D
        hereto (the "Amendment Agreement") to that certain Shareholders'
        Agreement dated January 29, 1995 (the "Shareholders' Agreement"),
        (vii) cause ETKC and its subsidiaries to execute and deliver to
        the individuals listed in Schedule 2.2 Release and
        Indemnification Agreements in the form of Exhibit D-1, (viii)
        execute and deliver to Management the Option Agreements, and (ix)
        deliver the closing certificates, documents and opinions of
        counsel as may be requested by counsel to Seller and Management.

             Section 2.3.  Action to be Taken by Seller at the Closing.
        At the Closing, in addition to the taking of such other action as
        may be provided in this Agreement, (i) Seller shall deliver
        certificates for the Shares to Buyer, duly endorsed to Buyer or
        accompanied by duly executed stock powers, (ii) Seller shall
        execute and deliver the Custody Agreement, (iii) Seller shall
        deliver to Buyer copies of the Certificate of Incorporation of
        ETKC and of Killam, as amended to date, certified by the
        Secretary of State of the States of Delaware and New Jersey,
        respectively, and copies of the bylaws of ETKC and of Killam, as
        amended to date, certified by an officer of ETKC and Killam,
        respectively, (iv) Seller shall pay to Management $100,000 in
        cash, as provided for in paragraph 1 of the Letter Agreement, (v)
        Seller shall deliver to Buyer duly executed letters of
        resignation, effective as of the Closing Date, of all directors
        and officers of ETKC and of each of its subsidiaries, and (vi)
        Seller shall deliver to Buyer the closing certificates, documents
        and opinions of counsel as may be requested by counsel to Buyer.

             Section 2.4.  Action to be Taken by Management at the
        Closing.  At the Closing, in addition to the taking of such other
        action as may be provided in this Agreement, Management shall (i)
        execute and deliver to Buyer option cancellation certificates in
        the form of Exhibit E hereto (the "Option Cancellation
        Certificates"), (ii) execute and deliver to Buyer the Option
        Agreements, (iii) execute and deliver to Buyer noncompetition
        agreements in the form of Exhibit F hereto ("Noncompetition
        Agreements"), (iv) execute and deliver to Buyer the Amendment
        Agreement, and (v) deliver the closing certificates, documents
        and opinions of counsel as may be requested by counsel to Buyer.


                                    ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES

             Section 3.1.  Representations and Warranties of Seller.
        Seller represents and warrants to Buyer that, as of the Closing
        Date, except as set forth on the disclosure schedule attached
        hereto as Exhibit G (the "Disclosure Schedule"):

                  (a)  Authority.  The execution and delivery of this
        Agreement, and the consummation of the transactions contemplated

                                        5
PAGE
<PAGE>





        hereby to be performed by Seller, have been duly and validly
        authorized by all necessary corporate action on the part of
        Seller.  This Agreement and the Escrow Agreement constitute valid
        and binding obligations of Seller enforceable against Seller in
        accordance with the terms hereof and thereof, except as such
        enforceability may be limited by applicable bankruptcy,
        insolvency, reorganization, moratorium or other laws affecting
        the rights of creditors or by general principles of equity.
        Neither the execution, delivery and performance of this Agreement
        by Seller, nor the consummation of the transactions contemplated
        hereby will (i) conflict with or result in a violation, breach,
        termination or acceleration of, or default under (or would result
        in such a violation, breach, termination, acceleration or default
        with the giving of notice or passage of time, or both) any of the
        terms, conditions or provisions of the charter documents or
        bylaws of Seller or the certificate of incorporation or bylaws of
        ETKC or the certificate of incorporation or bylaws of Killam,
        each as amended, or of any note, bond, mortgage, indenture,
        agreement or other instrument or obligation to which Seller or,
        to the knowledge of Seller, ETKC or Killam is a party or by which
        Seller or, to the knowledge of Seller, ETKC or Killam, or any of
        their respective properties or assets may be bound or materially
        negatively affected; (ii) result in the violation of any order,
        writ, injunction, decree, statute, rule or regulation applicable
        to Seller, ETKC or Killam, or their respective properties or
        assets; or (iii) result in the imposition of any lien,
        encumbrance, charge or claim upon the Shares or any of the assets
        of ETKC or Killam, except, in the case of each of the subsections
        of this Section 3.1(a), for such conflicts, violations, breaches,
        terminations, accelerations, defaults and impositions which would
        not have a material adverse effect upon the business, assets or
        financial condition of ETKC and its subsidiaries taken together
        as a whole.  Except for a filing under the Hart-Scott-Rodino
        Antitrust Improvements Act of 1976, as amended (the "HSR Act"),
        no consent or approval by, or notification to or filing with, any
        court, governmental authority or third party is required in
        connection with the execution, delivery and performance of this
        Agreement by Seller or the consummation of the transactions
        contemplated hereby to be performed by Seller.

                  (b)  Ownership of Shares; Authority to Transfer.  The
        Shares are not encumbered and are freely transferable by Seller.
        Seller holds good and marketable title to the Shares to be
        transferred to Buyer hereunder and no third party is entitled to
        claim any right thereto or make any claim thereon.  The transfer
        of the Shares to Buyer pursuant to this Agreement will vest in
        Buyer title to the Shares, free and clear of all liens, claims,
        equities, options, calls, voting trusts, agreements, commitments
        and encumbrances whatsoever.

                  (c)  Organization and Qualification.  ETKC is a
        corporation validly existing and in good standing under the laws
        of the State of Delaware and has all requisite corporate power
        and authority to own, operate and lease its properties and to

                                        6
PAGE
<PAGE>





        carry on its business as it is now being conducted.  ETKC is not
        qualified as a foreign corporation to do business in any other
        jurisdiction.

                  (d)  Capitalization.  The authorized capital stock of
        ETKC consists of 1,500,000 shares of Voting Common Stock, 500,000
        shares of Non-Voting Common Stock and 500,000 shares of Preferred
        Stock.  There is no other capital stock of ETKC authorized for
        issuance.  There are 1,050,000 shares of ETKC's Voting Common
        Stock issued and outstanding, and 235,715 shares of ETKC's
        Non-Voting Common Stock issued and outstanding, and these shares
        collectively constitute the total issued and outstanding share
        capital of ETKC.  All of such shares have been duly authorized
        and validly issued, are fully paid, nonassessable and free of
        preemptive rights.  There are no existing or outstanding options
        to purchase shares of ETKC's capital stock.  Except as set forth
        on the Disclosure Schedule, no shares of ETKC's capital stock are
        reserved for issuance and there are no warrants, convertible
        instruments or other rights, agreements or commitments,
        contingent or otherwise, obligating ETKC to issue, sell or
        purchase shares of capital stock.  The books of account, minute
        books, stock certificate books and stock ledgers, are complete
        and correct in all material respects and accurately reflect the
        conduct of the business and affairs of ETKC.  There are 6,360
        shares of Killam's Class A Common Stock issued and outstanding,
        and these shares constitute the total issued and outstanding
        share capital of Killam.  All of such shares have been duly
        authorized and validly issued, are owned by ETKC, are fully paid,
        nonassessable and free of preemptive rights.  

                  (e)  Subsidiaries of ETKC.  ETKC has no Subsidiaries
        (as defined below) other than Killam and wholly-owned
        subsidiaries of Killam.  To the knowledge of Seller, ETKC is not
        a partner or joint venturer with any other person.  To the
        knowledge of Seller, ETKC is not subject to any obligation,
        contingent or otherwise, to provide funds to or make an
        investment (in the form of a loan, capital contribution or
        otherwise) in any entity.  For purposes of this Agreement, a
        Subsidiary of a corporation shall mean an entity of which 50% or
        more of the effective voting power or equity interest is owned
        directly or indirectly by such corporation.

                  (f)  Taxes.  ETKC has accurately prepared and duly and
        timely filed all tax and other returns and reports which were
        required to be filed, in respect of all U.S. Federal income taxes
        and penalties or interest associated therewith (collectively
        "Federal Income Taxes") and all state and local, income
        franchise, excise, sales, use, property (real and personal) and
        payroll taxes and penalties or interest associated therewith
        (collectively, "Taxes").  Seller has delivered to Buyer true and
        complete copies of the Federal Income Tax returns and income Tax
        returns filed by ETKC with the Federal government or any state
        governmental authority in respect of 1991, 1992 and 1993.  The
        Federal Income Tax return of ETKC for the year ended December 31,

                                        7
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<PAGE>





        1991 was audited by the Internal Revenue Service.  No deficiency
        for any Federal Income Tax has been asserted against ETKC with
        respect to any taxable year or period ending on or prior to the
        Effective Date.  No waivers of any statutes of limitation are in
        effect in respect of any Federal Income Taxes with respect to any
        taxable year or period ending on or prior to the Effective Date.
        There are no claims pending or, to the knowledge of Seller,
        threatened, against ETKC for past due Federal Income Taxes with
        respect to any taxable year or period ending on or prior to the
        Effective Date, except to the extent accrued for or reserved
        against in the Effective Date Balance Sheet, nor, to the
        knowledge of Seller, is there any basis for any such claim.  ETKC
        will not have any liability for Federal Income Taxes for or in
        respect of any period or periods ending on or prior to the
        Effective Date, except to the extent accrued for or reserved
        against in the Effective Date Balance Sheet.  None of the Tax
        returns of ETKC has been or is being audited or examined by the
        governmental department or agency having jurisdiction, nor has
        any deficiency for any Tax been asserted against ETKC with
        respect to any taxable year or period ending prior to the
        Effective Date, except to the extent accrued for or reserved
        against in the Effective Date Balance Sheet.  No waivers of any
        statutes of limitation are in effect in respect of any Taxes with
        respect to any taxable year or period ending on or prior to the
        Effective Date.  There are no claims pending or threatened
        against ETKC for past due Taxes with respect to any taxable year
        or period ending on or prior to the Effective Date, except to the
        extent accrued for or reserved against in the Effective Date
        Balance Sheet, nor, to the knowledge of Seller and Management, is
        there any basis for any such claim.  ETKC will not have any
        liability for Taxes for or in respect of any period or periods
        ending on or prior to the Effective Date, except to the extent
        accrued for or reserved against in the Effective Date Balance
        Sheet. 

                  (g)  Brokers and Finders.  Seller has not on behalf of
        ETKC or Killam employed any broker, agent or finder other than
        Gerschel & Company, Inc. and affiliates of Compagnie Financiere
        de Paribas in connection with the transactions contemplated
        hereby.  Seller has not and will not incur any liability on
        behalf of ETKC or Killam for any brokerage fees, agents'
        commissions or finders' fees in connection with the transactions
        contemplated hereby, except to the extent paid on or prior to the
        Effective Date or reserved for or accrued against on the
        Effective Date Balance Sheet.  It is understood that fees payable
        to Gerschel & Company, Inc., Compagnie Financiere de Paribas or
        its affiliates and Environmental Financial Consulting Group, as
        well as certain legal fees and expenses, may be accrued for in
        the Effective Date Balance Sheet.

                  (h)  Hart-Scott-Rodino Filing.  Seller has complied in
        all material respects with all applicable requirements under the
        HSR Act, and the rules and regulations promulgated thereunder,
        relating to making, filing with and furnishing information to the

                                        8
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        Federal Trade Commission and the United States Department of
        Justice in connection with the transactions contemplated hereby.

             Section 3.2.  Representations and Warranties of Management.
        Each member of Management represents and warrants to Buyer that,
        as of the Closing Date, except as set forth on the Disclosure
        Schedule:

                  (a)  Authority.  The execution and delivery of this
        Agreement by Management, and the consummation of the transactions
        contemplated hereby to be performed by Management, have been duly
        and validly authorized by all necessary action on the part of
        such member of Management.  This Agreement, the Amendment
        Agreement and the Noncompetition Agreements constitute the valid
        and binding obligations of such member of Management enforceable
        against him in accordance with the terms hereof and thereof,
        except as such enforceability may be limited by applicable
        bankruptcy, insolvency, reorganization, moratorium or other laws
        affecting the rights of creditors or by general principles of
        equity.  Neither the execution, delivery and performance of this
        Agreement by him, nor the consummation of the transactions
        contemplated hereby to be performed by Management will (i)
        conflict with or result in a violation, breach, termination or
        acceleration of, or default under (or would result in such a
        violation, breach, termination, acceleration or default with the
        giving of notice or passage of time, or both) any of the terms,
        conditions or provisions of the certificate of incorporation or
        bylaws of Killam, each as amended, or of any note, bond,
        mortgage, indenture, agreement or other instrument or obligation
        to which he or, to his knowledge, Killam is a party or by which
        he or, to his knowledge, Killam, or any of their respective
        properties or assets may be bound or materially negatively
        affected; (ii) result in the violation of any order, writ,
        injunction, decree, statute, rule or regulation applicable to
        him, Killam, or their respective properties or assets; or (iii)
        result in the imposition of any lien, encumbrance, charge or
        claim upon any of the assets of Killam, except, in the case of
        each of the subsections of this Section 3.2(a), for such
        conflicts, violations, breaches, terminations, accelerations,
        defaults and impositions which would not have a material adverse
        effect upon the business, assets or financial condition of Killam
        and its subsidiaries taken together as a whole.  No consent or
        approval by, or notification to or filing with, any court,
        governmental authority or third party is required in connection
        with the execution, delivery and performance of this Agreement by
        such member of Management or the consummation of the transactions
        contemplated hereby to be performed by such member of Management.

                  (b)  Certain Investment Representations.  

                       (i)  He has, in connection with his decision to
             acquire the Buyer Options, relied solely upon Buyer's
             Confidential Placement Memorandum dated January 29, 1995 and
             the documents incorporated therein by reference; and 

                                        9
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<PAGE>






                       (ii)  Taking into account the personnel and
             resources he can practically bring to bear on the
             acquisition of the Buyer Options contemplated hereby, is
             knowledgeable, sophisticated and experienced in making, and
             is able to make, decisions with respect to investments in
             securities presenting an investment decision like that
             involved in the acquisition of the Buyer Options, including
             investments in securities issued by Buyer, and to assess the
             risks and merits presented by the acquisition of the Buyer
             Options, and has requested, received, reviewed and
             considered all information he deems relevant in making an
             informed decision to acquire the Buyer Options.

                  (c)  Brokers and Finders.  Management has not on behalf
        of Killam employed any broker, agent or finder other than
        Environmental Financial Consulting Group in connection with the
        transactions contemplated hereby.  Management has not and will
        not incur any liability on behalf of Killam for any brokerage
        fees, agents' commissions or finders' fees in connection with the
        transactions contemplated hereby to be performed by Management,
        except to the extent paid on or prior to the Effective Date or
        reserved for or accrued against on the Effective Date Balance
        Sheet.  It is understood that fees payable to Gerschel & Company,
        Inc., Compagnie Financiere de Paribas or its affiliates and
        Environmental Financial Consulting Group, as well as certain
        legal fees and expenses, may be accrued for in the Effective Date
        Balance Sheet.

             Section 3.3.  Certain Definitions.  Unless and except to the
        extent expressly indicated otherwise, when used in Section 3.4 of
        this Agreement:

                       (i)  any reference to ETKC contained in Section
             3.4 shall be deemed to mean ETKC and its Subsidiaries taken
             together as a whole (other than in the case of any
             representation or warranty in Section 3.4 made by
             Management, in which case any such reference shall be deemed
             to mean Killam and its Subsidiaries taken together as a
             whole); and any reference to Killam contained in Section 3.4
             (other than Sections 3.4(a) and 3.4(b)) shall be deemed to
             mean Killam and its Subsidiaries taken together as a whole; 

                       (ii)  the term "knowledge," when used with respect
             to any party to this Agreement, shall mean the actual
             knowledge of such party and the knowledge such party would
             have acquired after conducting an investigation concerning
             the relevant matters as such party reasonably determined to
             be adequate and appropriate under the circumstances;
             provided, that Seller and each member of Management shall
             specifically be attributed with, and be deemed to possess,
             the knowledge of Seller and each member of Management; 



                                       10
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<PAGE>





                       (iii)  Management shall not be attributed with, or
             be deemed to possess, solely by virtue of the preceding
             clause (ii), the knowledge of Seller with respect to matters
             specifically related to ETKC but not to Killam; and

                       (iv)  the term "ordinary course of business" shall
             mean the ordinary course of business of ETKC or of Killam
             consistent with its past custom and practice.

             Section 3.4.  Representations and Warranties by Seller and
        Management.  Seller and Management represent and warrant
        (severally and not jointly, but subject in each case to the
        attribution of knowledge pursuant to Section 3.3(ii)) to Buyer
        that, as of the Closing Date, except as set forth on the
        Disclosure Schedule:

                  (a)  Organization and Qualification.  Killam is a
        corporation validly existing and in good standing under the laws
        of the State of New Jersey and has all requisite corporate power
        and authority to own, operate and lease its properties and to
        carry on its business as it is now being conducted.  Killam is
        duly qualified as a foreign corporation to do business, and is in
        good standing, in each jurisdiction listed on the Disclosure
        Schedule.

                  (b)  Capitalization.  The authorized capital stock of
        Killam consists of 45,000 shares of Class A Common Stock and
        5,000 shares of Class B Common Stock.  There is no other capital
        stock of Killam authorized for issuance.  There are 6,360 shares
        of Killam's Class A Common Stock issued and outstanding, and
        these shares constitute the total issued and outstanding share
        capital of Killam.  There are no existing or outstanding options
        to purchase shares of Killam's common stock other than the Killam
        Options.  Other than with respect to the Killam Options, no
        shares of Killam's capital stock are reserved for issuance and
        there are no warrants, convertible instruments or other rights,
        agreements or commitments, contingent or otherwise, obligating
        Killam to issue, sell or purchase shares of capital stock.  The
        minute books, stock certificate books and stock ledgers, are
        complete and correct in all material respects and accurately
        reflect the conduct of the business and affairs of Killam.

                  (c)  Subsidiaries of Killam.  Set forth on the
        Disclosure Schedule is a list of all Subsidiaries of Killam as of
        the Closing Date hereof, including, with respect to each such
        Subsidiary, its jurisdiction of incorporation.  All of the
        outstanding capital stock of each such Subsidiary has been duly
        authorized and validly issued, is fully paid, nonassessable and
        free of preemptive rights, and is owned beneficially and of
        record by Killam or by another Subsidiary free and clear of any
        lien, right, encumbrance or restriction of any nature, including,
        without limitation, any lien, right, encumbrance or restriction
        on transfer or voting.  No shares of any such Subsidiary's
        capital stock are reserved for issuance, and there are no

                                       11
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<PAGE>





        options, warrants, convertible instruments or other rights,
        agreements or commitments, contingent or otherwise, obligating a
        Subsidiary to issue, sell or purchase capital stock.  To the
        knowledge of Seller and Management, Killam is not a partner or
        joint venturer with any other person.  To the knowledge of Seller
        and Management, Killam is not subject to any obligation,
        contingent or otherwise, to provide funds to or make an
        investment (in the form of a loan, capital contribution or
        otherwise) in any entity other than ETKC or one of its
        Subsidiaries.  Each such Subsidiary is in good standing under the
        laws of its jurisdiction of incorporation and has all requisite
        power and authority to own, operate and lease its properties and
        to carry on its respective business as it is now being conducted.
        Seller and Management have delivered to Buyer complete and
        correct copies of the charter and bylaws of each such Subsidiary,
        as amended.  Each such Subsidiary is duly qualified as a foreign
        corporation to do business, and is in good standing, in each
        jurisdiction listed on the Disclosure Schedule.

                  (d)  Financial Statements.  Seller has delivered to
        Buyer prior to the execution of this Agreement true and complete
        copies of:  (i) the audited consolidated balance sheets of ETKC
        as at December 31, 1993 and 1992, and audited consolidated
        statements of earnings and cash flows for the years ended
        December 31, 1993 and 1992 accompanied by the report thereon by
        Arthur Andersen & Co., (ii) the audited consolidated balance
        sheet of ETKC as at October 31, 1994, and (iii) the unaudited
        consolidated balance sheet of ETKC as at December 31, 1994 (the
        "Balance Sheet") (all of the financial statements referred to in
        this Section 3.4(d), collectively, the "Financial Statements").
        The audited balance sheet as at October 31, 1994 and the Balance
        Sheet fairly present the financial condition of ETKC as at
        October 31, 1994 and December 31, 1994, respectively, and the
        other Financial Statements fairly present the financial
        condition, results of operations and cash flows of ETKC as at the
        dates and for the periods indicated, in each case in accordance
        with generally accepted accounting principles applied on a basis
        consistent with previous years.  Since the date of the Balance
        Sheet, there has been no material adverse change in the financial
        condition, assets, liabilities, earnings, business or prospects
        of ETKC.

                  (e)  [Intentionally left blank.]


                  (f)  No Undisclosed Liabilities.  To the knowledge of
        Seller and Management, ETKC has no liabilities or obligations of
        any nature, other than (i) liabilities reflected on the Balance
        Sheet (in amounts not in excess of those included for such
        liabilities on the Balance Sheet), (ii) liabilities which are not
        required under generally accepted accounting principles to be
        accrued for or reserved against on the Balance Sheet and which
        were incurred in the ordinary course of business and which would
        not have a material adverse effect upon the business, assets or

                                       12
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<PAGE>





        financial condition of ETKC, and (iii) liabilities incurred after
        the date of the Balance Sheet either in the ordinary course of
        business or in contemplation of the transactions contemplated by
        this Agreement, which would not have a material adverse effect
        upon the business, assets or financial condition of ETKC.   

                  (g)  Properties; Environmental and Health and Safety
        Matters.  ETKC has good and marketable title to, or a valid and
        continuing leasehold interest in, all properties and assets, real
        and personal, reflected on the Balance Sheet, free and clear of
        all mortgages, liens, attachments, pledges, encumbrances or
        security interests of any nature whatsoever.  To the knowledge of
        Seller and Management, ETKC has never owned any real estate.  To
        the knowledge of Seller and Management, all leases pursuant to
        which ETKC leases real or personal property are in good standing,
        and are valid and in full force and effect in accordance with
        their respective terms.  To the knowledge of Seller and
        Management, there are no uncured defaults under any such leases
        attributable to ETKC which would have a material adverse effect
        upon the business, assets or financial condition of ETKC, and no
        event has occurred that (whether or not with notice, lapse of
        time or both) would constitute such a default.  To the knowledge
        of Seller and Management, all buildings, improvements, machinery,
        equipment, vehicles and items of tangible personal property used
        in connection with the operations of ETKC or Killam are adequate
        for the uses to which they are being put.

                  To the knowledge of Seller and Management, and except
        for such units and occurrences which would not have a material
        adverse effect upon the business, assets or financial condition
        of ETKC, the Disclosure Schedule accurately sets forth or
        describes:

                       (i)  (A) landfills, surface impoundments, pits,
             ponds, lagoons, underground injection wells, waste piles,
             land treatment units and incinerators used by ETKC for the
             handling, treatment, recycling, reuse, storage and disposal
             (hereinafter "management") of Hazardous Materials (as
             defined below) and (B) all underground, in-ground or
             on-ground storage tanks on property which has been or is
             currently owned or leased by ETKC (including its
             predecessors in interest);

                       (ii)  for all units identified in clause (i)(A),
             information on the time period used, type of Hazardous
             Material, method of management, and whether there has been
             evidence of releases of Hazardous Materials from such units
             onto the ground or subsurface or into groundwater or surface
             waters;

                       (iii)  for all tanks identified in clause (i)(B),
             information on the time period used, Hazardous Material
             being stored, and when and what tests, if any, have been
             conducted regarding tank integrity and test results, and

                                       13
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<PAGE>





             whether there are releases of Hazardous Material from such
             units onto the ground or subsurface or into groundwater or
             surface waters;

                       (iv)  any evidence, including sample results, of
             soil, surface water, or groundwater contamination by
             Hazardous Materials on or migrating from property which has
             been or is currently owned or leased by ETKC which is not
             addressed by clauses (ii) or (iii);

                       (v)  a list of all sites to which hazardous
             wastes, as such term is defined under the Resources
             Conservation and Recovery Act, as amended ("RCRA")
             (hereinafter, "Hazardous Wastes") have been sent by ETKC
             since January 1, 1992, the owner or operator of such
             off-site facilities, the transporter of such Hazardous
             Wastes, and type of Hazardous Wastes;

                       (vi)  reports of releases (including, but not
             limited to, continuous release reports) of Hazardous
             Material occurring on or from facilities owned or leased by
             ETKC and reported to (A) the National Response Center, State
             Emergency Response Commissions, Local Emergency Planning
             Committees or the United States Environmental Protection
             Agency (the "EPA") pursuant to requirements of the
             Comprehensive Environmental Response, Compensation and
             Liability Act of 1980, as amended by the Superfund
             Amendments and Reauthorization Act of 1986 ("CERCLA"), RCRA,
             the Clean Water Act ("CWA") or other Federal statutes; or
             (B) any state or local governmental authority;

                       (vii)  noncompliance by ETKC with conditions of
             environmental permits or licenses issued pursuant to, or
             other requirements of, the Clean Air Act, CWA, RCRA, the
             Toxic Substances Control Act of 1976 ("TSCA"), the Safe
             Drinking Water Act, CERCLA or similar state or local
             statutes, laws, ordinances, rules or regulations;

                       (viii)  Hazardous Waste Manifest Discrepancy
             Reports, RCRA biennial reports or similar state reports,
             Discharge Monitoring Reports, air emission monitoring
             reports and air emission inventories, filed by ETKC with any
             government agency since January 1, 1992;

                       (ix)  Reports of environmental audits conducted of
             facilities owned or leased by ETKC, and action plans and
             progress reports responding to audit findings.  Such audits
             include audits conducted by ETKC and its consultants,
             insurance companies or governmental agencies;

                       (x)  Written claims, litigation and other legal
             proceedings (including but not limited to notices of
             violation, notices of noncompliance, citations, orders,
             investigation reports, consent orders, consent decrees and

                                       14
PAGE
<PAGE>





             administrative or judicial enforcement proceedings) seeking
             or alleging money damages (resulting from injury to person
             or property), injunctive relief, remedial action, fines,
             penalties or any other remedy by reason of (A) violation of
             or noncompliance with any law, regulation, rule or
             requirement of law or regulation relating to pollution or
             protection of the environment ("Environmental Laws"), or any
             permit, license or registration issued thereunder; or (B)
             the disposal, discharge or release into the environment of
             Hazardous Materials; or (C) the ownership, operation or use
             of any landfill, surface impoundment, pit, pond, lagoon,
             underground injection well, waste pile, land treatment unit,
             wastewater treatment plant, air pollution control equipment,
             or any other unit used for disposal of Hazardous Materials;
             including, in all cases, all legal proceedings which have
             been concluded (e.g., a judgment or consent decree has been
             entered) but pursuant to which work is ongoing (e.g., a
             decree requiring remedial activity to be undertaken);

                       (xi)  All permits and licenses and pending
             applications for permits and licenses for facilities which
             are currently owned or leased by ETKC, including
             notifications to governmental agencies required by Sections
             3010(a) (notice of hazardous waste activity) and 9002
             (underground storage tanks) of RCRA and by comparable state
             laws, and notices and reports required pursuant to Sections
             302, 311, 312 and 313 of Title III of the Superfund
             Amendments and Reauthorization Act of 1986 and comparable
             state laws;

                       (xii)  All current and expired or terminated
             contracts involving the off-site transportation or
             management of Hazardous Wastes generated by ETKC that were
             in effect at any time since January 1, 1992; and

                       (xiii)  A description of the manner in which any
             asbestos-containing material in a friable condition is used
             or otherwise present at any facility which is currently
             owned or leased by ETKC.

                  To the knowledge of Seller and Management, ETKC is not
        in violation of any law, regulation or ordinance (including
        without limitation, laws, regulations or ordinances relating to
        building, health code, zoning, environmental, land use or similar
        matters) relating to its properties or facilities.  To the
        knowledge of Seller and Management, the real property occupied or
        used by ETKC is not subject to any condition that requires
        clean-up or remediation by ETKC.  To the knowledge of Seller and
        Management, such properties do not contain any Hazardous Material
        (as defined below), nor has any Hazardous Material been
        discharged or spilled thereon.  To the knowledge of Seller and
        Management, ETKC has never owned or operated a Hazardous Waste
        landfill or any Hazardous Waste treatment, storage or disposal
        facility.  To the knowledge of Seller and Management, there are

                                       15
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<PAGE>





        no past or present events, conditions, circumstances, activities,
        practices, incidents, actions or plans of ETKC or its
        predecessors, either collectively, individually or severally,
        which may interfere with or prevent continued compliance, or
        which may give rise to any common law or legal liability, or
        otherwise form the basis of any claim, action, suit, proceeding,
        hearing, or investigation, based on or related to the disposal,
        storage, handling, manufacture, processing, distribution, use,
        treatment, or transport, or the emission, discharge, release or
        threatened release into the environment, of any pollutant or
        waste, whether or not by ETKC or affecting its properties, and in
        each case which would have a material adverse effect upon the
        business, assets or financial condition of ETKC.  To the
        knowledge of Seller and Management, there are no proceedings
        affecting any of the real properties currently owned or leased by
        ETKC pending or threatened which would have a material adverse
        effect on the present or future use of any such property for the
        purposes for which it was acquired or the purpose for which it is
        used.  To the knowledge of Seller and Management, ETKC has not
        received any written notice from any governmental agency or other
        party alleging any liability with regard to the real property
        occupied or used by ETKC now or at any time or with regard to any
        off-site environmental conditions.

                  For purposes of this Agreement, "Hazardous Materials"
        shall mean (a) any substance defined as a "hazardous substance"
        under CERCLA, (b) any petroleum or petroleum-based products, (c)
        any chemical substance or mixture regulated under the TSCA, (d)
        any "toxic pollutant" under the CWA, and (e) any similar
        contaminant deemed "hazardous" or "toxic" and regulated under any
        applicable state statute similar to such Federal statutes and
        relating to pollution control or environmental matters; but only
        if such substances, products, mixtures, pollutants or
        contaminants described in this paragraph are present in
        quantities or concentrations of a magnitude sufficient to give
        rise to an obligation on the part of ETKC, under such applicable
        statute, to remediate such contamination and which obligation to
        remediate is enforced by the applicable governmental authority or
        agency.

                  (h)  Governmental Authorizations.  To the knowledge of
        Seller and Management, set forth on the Disclosure Schedule is a
        complete and accurate list of all governmental permits, licenses,
        franchises, concessions, zoning variances and other governmental
        approvals, authorizations and orders which have been obtained in
        connection with the conduct of the business now being conducted
        by ETKC.  To the knowledge of Seller and Management, such
        approvals, authorizations and orders constitute all governmental
        approvals, authorizations and orders which are required under all
        applicable Federal, state or local laws and regulations for the
        operation of the business being conducted by ETKC as such
        business has been heretofore conducted.  To the knowledge of
        Seller and Management, all such approvals, authorizations and
        orders are presently in full force and effect, ETKC is in

                                       16
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<PAGE>





        compliance with the requirements thereof (except for minor
        violations that would not result in a suspension or forfeiture
        thereof and for other violations which claim would not have a
        material adverse effect upon the business, assets or financial
        condition of ETKC and its Subsidiaries taken together as a
        whole), no suspension or cancellation of any such approval,
        authorization or order is threatened, and the execution of this
        Agreement and the consummation of the transactions contemplated
        herein will not adversely affect the validity or effectiveness
        of, and will not require, for retention thereof after such change
        of ownership, the consent or approval of any party to, or any
        other person or 4.71 having jurisdiction of, any such approval,
        authorization or order.  To the knowledge of Seller and
        Management, there are no disputes pending between ETKC and any
        governmental authority about its respective operations as
        presently being conducted.  To the knowledge of Seller and
        Management, Buyer has been furnished or provided with an
        opportunity to review all material reports and applications filed
        by ETKC with any 4.71 in the last three years.

                  (i)  Intangibles.  To the knowledge of Seller and
        Management, set forth on the Disclosure Schedule is an accurate
        list and description of all patents, trademarks, trade names,
        service marks, brand names and copyrights, and registrations and
        applications therefor, used in the conduct of the business of
        ETKC or the use of which is necessary for the business of ETKC as
        now being conducted (the "Intangibles") and all licenses,
        sublicenses or other rights or obligations entered into or
        granted by or to ETKC with respect thereto.  To the knowledge of
        Seller and Management, ETKC owns or possesses adequate rights to
        use, free and clear of any obligation of payment, encumbrance,
        lien or claim, all such Intangibles.  To the knowledge of Seller
        and Management, no person has made any claim or demand upon ETKC
        pertaining to, and no proceeding is pending or threatened which
        challenges, the rights of ETKC in respect of any Intangibles.  To
        the knowledge of Seller and Management, ETKC has not infringed or
        engaged in the unauthorized use of any patent, trademark, trade
        name, service mark, brand name or copyright, or any invention,
        technology, technical know-how, process, design, trade secret or
        other intellectual property of any third party.  

                  (j)  Insurance.  To the knowledge of Seller and
        Management, ETKC is not in default with respect to any provisions
        of any policy of general liability, fire, title or other form of
        insurance held by it, except for defaults that would not result
        in a cancellation of any such policy or a denial of coverage
        thereunder, ETKC is current in the payment of all premiums due or
        has reserved for such premiums due on such insurance, and ETKC
        has not failed to give any notice or present any claim thereunder
        in due and timely fashion, except where such failure would not
        result in a cancellation of any such policy or a denial of
        coverage thereunder.  All policies of insurance held by ETKC are
        listed on the Disclosure Schedule.  To the knowledge of Seller
        and Management, under the terms of the policy relating thereto,

                                       17
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<PAGE>





        no such insurance will be automatically terminated or canceled by
        reason of the execution, delivery and performance of this
        Agreement or the consummation of the transactions contemplated
        hereby.  

                  (k)  Employee Benefit Plans.  For the purposes of this
        Section 3.4(k), the following definitions shall apply:

                  (i)  Accumulated Funding Deficiency:  An "accumulated
             funding deficiency" as defined in ERISA Section 302(a)(2) or
             the last two sentences of Section 412(a) of the Code.

                  (ii)  Complete Withdrawal:  A "complete withdrawal"
             from a Multiemployer Plan as defined in Section 4203 of
             ERISA.

                  (iii)  ERISA:  The Employee Retirement Income Security
             Act of 1974, as amended and in effect at the time of
             execution of this Agreement.

                  (iv)  ERISA Affiliate:  ERISA Affiliate shall mean any
             member of any controlled group of corporations, group of
             trades or businesses under common control, or affiliated
             service group (as defined for purposes of Section 414(b),
             (c) and (m), respectively, of the Code) which includes ETKC.

                  (v)  Multiemployer Plan:  A "multiemployer plan" as
             defined in ERISA Section 3(37) or Section 414(f) of the
             Code.

                  (vi)  Partial Withdrawal:  A "partial withdrawal" from
             a Multiemployer Plan as defined in Section 4205 of ERISA.

                  (vii)  Plan Termination:  A termination of a Pension
             Plan, whether partial or complete, within the meaning of
             Title IV of ERISA.

                  (viii)  PBGC:  The Pension Benefit Guaranty
             Corporation.

                  (ix)  Pension Plan:  A "pension plan" or "employee
             pension benefit plan" as defined in Section 3(2) of ERISA.

                  (x)  Prohibited Transaction:  A "prohibited
             transaction" as defined in ERISA Section 406 or Section
             4975(c) of the Code.

                  (xi)  Reportable Event:  A "reportable event" as
             defined in Section 4043(b) of ERISA.

                  (xii)  Welfare Plan:  A "welfare plan" or an "employee
             welfare benefit plan" as defined in Section 3(1) of ERISA.



                                       18
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<PAGE>





                  To the knowledge of Seller and Management, except for
        instances of noncompliance and other events which would not
        jeopardize the qualification of any Pension Plan or Welfare Plan
        under the Code or under ERISA and which would not otherwise have
        a material adverse effect upon the business, assets or financial
        condition of ETKC:

                  (i)  ETKC does not maintain or contribute to any
             Pension Plan or any Welfare Plan, and neither ETKC nor any
             ERISA Affiliate contributes to any Multiemployer Plan.  All
             Pension Plans and Welfare Plans of ETKC have been
             administered in compliance with their terms, ERISA and,
             where applicable, the Code.  The Internal Revenue Service
             has issued a favorable determination letter with respect to
             the qualification of each such Pension Plan which is
             intended to qualify under Section 401(a) of the Code and the
             exemption of any corresponding trust.  A copy of the most
             recent determination letter for each Pension Plan has been
             furnished to Buyer, and nothing has occurred since the date
             of each such determination letter that would cause the
             relevant Pension Plan or trust to lose such qualification or
             exemption.  With respect to each Pension Plan:  (1) there is
             no fact, including, without limitation, any Reportable
             Event, that exists that would constitute grounds for
             termination of such Plan by the PBGC or for the appointment
             by the appropriate United States District Court of a trustee
             to administer such plan, in each case as contemplated by
             ERISA; (2) neither ETKC nor any fiduciary, trustee or
             administrator of any Pension Plan or Welfare Plan has
             engaged in any Prohibited Transaction that would subject
             ETKC to any tax or any penalty imposed by ERISA or the Code;
             (3) ETKC has no liability to the PBGC (other than for
             payment of premiums); and (4) there is no Accumulated
             Funding Deficiency with respect to any Pension Plan
             maintained by ETKC or by any ERISA Affiliate, whether or not
             waived.  

                  (ii)  No Pension Plan or Welfare Plan, ETKC or any
             ERISA Affiliate, or any "party in interest" or "disqualified
             person" (as such terms are defined in Section 3 of ERISA and
             Section 4975 of the Code) with respect to any Pension Plan
             or Welfare Plan has taken any action including the making of
             any investment, or failed to take any action, that would
             subject any of them or any other person to any liability for
             any tax or for breach of fiduciary duty with respect to or
             in connection with any Pension Plan or Welfare Plan.  No
             Pension Plan or Welfare Plan, administrator or fiduciary of
             any Pension Plan or Welfare Plan, or ETKC has any liability
             under any provision of any applicable law by reason of any
             communication or failure to communicate with respect to or
             in connection with any Pension Plan or Welfare Plan, or any
             filing or failure to file with any governmental entity.  No
             Pension Plan or Welfare Plan, administrator or fiduciary of
             any Pension Plan or Welfare Plan, or ETKC or any ERISA

                                       19
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             Affiliate has any liability to any plan participant,
             beneficiary or other person under any provision of any
             applicable law by reason of any payment of benefits or other
             amounts or failure to pay benefits or any other amounts, or
             by reason of any credit or failure to give credit for any
             benefits or rights (such as, but not limited to, vesting
             rights) with respect to benefits under or in connection with
             any Pension Plan or Welfare Plan, other than benefit claims
             in the normal administration of each Pension Plan or Welfare
             Plan.  ETKC is not delinquent or in arrears on any amounts
             owed to, or with respect to any contributions under, any
             Pension Plan or Welfare Plan.  No person is a participant in
             or eligible for participation (without regard to age or
             service) in, any Pension Plan or Welfare Plan who is not a
             present or former employee of ETKC or a beneficiary of such
             an employee.  None of the Pension Plans or Welfare Plans
             provides for continuing accrual of benefits or coverage for
             any participant or beneficiary of a participant after such
             participant's termination of employment with ETKC other than
             Killam's post-retirement medical plan.

                  (iii)  There has been no Plan Termination that has
             occurred during the five-year period ending on the Closing
             Date.  ETKC has not incurred any liability under Title IV of
             ERISA with respect to any Pension Plan maintained by a trade
             or business (whether or not incorporated) which is under
             common control with, or part of a controlled group of
             corporations with, ETKC, within the meaning of Sections
             414(b) or (c) of the Code.  No event has occurred and no
             condition exists with respect to any Pension Plan or Welfare
             Plan that would subject ETKC to any tax under Section 4972,
             4977, 4979 or 4980B of the Code or to a fine under ERISA
             Section 502(c) with respect to any such plan.  No Welfare
             Plan is funded with a trust or other funding vehicle, other
             than insurance policies.  There has occurred no Complete
             Withdrawal or Partial Withdrawal with respect to any
             Multiemployer Plan that would cause ETKC to incur any
             liability under or as a result of ERISA other than to the
             extent reserved for or accrued against in the Balance Sheet,
             and all payments required to be made to any such Plan by
             ETKC under any applicable collective bargaining agreements
             have been made.  There are no actions, arbitrations or
             claims pending or threatened with respect to any Pension
             Plan, Welfare Plan or other employee benefit plans or any
             fiduciary or sponsor thereof.  

                  (l)  Descriptions and Lists.  To the knowledge of
        Seller and Management, set forth on the Disclosure Schedule is an
        accurate and complete list of the following oral or written
        contracts, agreements, leases and other documents presently in
        effect to which ETKC is a party or by which it or its respective
        properties or assets are bound, other than agreements and other
        commitments which would not have a material adverse effect upon
        the business, assets or financial condition of ETKC and other

                                       20
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<PAGE>





        than agreements and other commitments the termination of which
        would not have a material adverse effect upon the business,
        assets or financial condition of ETKC:

                       (i)  a list of all interests in real property
             owned or leased by ETKC;

                       (ii)  a list of (A) each customer that accounted
             for more than $100,000 of ETKC's revenues during calendar
             1994; (B) each agreement containing any covenant restricting
             the freedom of ETKC to compete in any line of business or
             area or with any person; (C) each agreement obligating,
             absolutely or on a contingent basis, ETKC to make payments
             to a third party based on its future sales, revenues or
             earnings from a product or service; and (D) each agreement
             of ETKC not made in the ordinary course of business which is
             not otherwise disclosed pursuant to another section of the
             Disclosure Schedule;

                       (iii)  a list of (A) the names and salaries,
             bonuses and vacation allowances of all present officers and
             employees of ETKC, including the last date of any increase
             in such persons' compensation; (B) any persons on leave of
             absence or who are currently collecting disability payments;
             and (C) all employment, consulting or similar compensation
             agreements of ETKC which may not be terminated without
             penalty within 60 days after the Closing;

                       (iv)  a list of all bonus, incentive compensation,
             deferred compensation, profit-sharing, stock option,
             retirement, pension, severance, death benefit or other
             fringe benefit plans, agreements or arrangements of ETKC in
             effect, or under which any amounts remain unpaid on the
             Closing Date;

                       (v)  a list of all labor unions or other
             organizations representing any employees of ETKC;

                       (vi)  a list of each agreement or other instrument
             or arrangement defining the terms on which any outstanding
             indebtedness of ETKC has been issued;

                       (vii)  a list of each outstanding commitment by
             ETKC to make a capital expenditure, capital addition or
             capital improvement involving an amount in excess of
             $250,000;

                       (viii)  the name and location of every bank in
             which ETKC has an account, safe deposit box or line of
             credit, the identifying number of all such accounts and safe
             deposit boxes, and the names of all persons having power to
             borrow, discount debt obligations, cash or draw checks or
             otherwise act on behalf of the respective corporation in any
             dealings with such banks; 

                                       21
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<PAGE>






                       (ix)  all industrial hygiene surveys prepared by
             or on behalf of ETKC since January 1, 1990, to the extent
             reasonably available from the records of ETKC;

                       (x)  summaries of all epidemiological or
             toxicological studies conducted by or on behalf of ETKC
             since January 1, 1990, to the extent reasonably available
             from the records of ETKC;

                       (xi)  all occupational safety and health reports
             filed with governmental agencies or instrumentalities by or
             on behalf of ETKC since January 1, 1990, to the extent
             reasonably available from the records of ETKC;

                       (xii)  annual summaries of workers compensation
             liabilities of ETKC since January 1, 1990, to the extent
             reasonably available from the records of ETKC;

                       (xiii)  all citations, notices of violations,
             orders, consent orders, administrative or judicial
             enforcement proceedings from governmental agencies or
             instrumentalities with respect to health or safety matters
             currently pending against ETKC;

                       (xiv)  all medical surveillance programs currently
             provided for employees involved with raw materials and
             products (including waste products) used or produced, to the
             extent reasonably available from the records of ETKC;

                       (xv)  a list of each accident or event which has
             resulted in, or may result in, a claim against ETKC that
             personal injury, property damage or economic loss was caused
             by ETKC or involved any employee of ETKC in his capacity as
             an employee, to the extent reasonably available from the
             records of ETKC; and 

                       (xvi)  a list of all claims (other than health and
             dental claims) filed and currently pending under the
             insurance policies listed pursuant to Section 3.4(j)
             (including, in their aggregate amount, employee benefit
             claims other than health or dental insurance claims).

                  (m)  Validity.  To the knowledge of Seller and
        Management, there is no default on the part of ETKC, or basis on
        which, with notice or lapse of time or both (including notice of
        this Agreement), a default would exist, in any obligation on the
        part of ETKC to be performed under any lease, contract, plan,
        policy or other instrument or arrangement referred to in Section
        3.4(l) that would entitle any other party to or beneficiary under
        any such lease, contract, plan, policy or other instrument or
        arrangement to unilaterally terminate or seek relief under such
        lease, contract, plan, policy or other instrument or arrangement.


                                       22
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<PAGE>





                  (n)  No Changes.  To the knowledge of Seller and
        Management, since the date of the Balance Sheet, there has not
        been:

                       (i)  any damage, destruction or loss (whether or
             not covered by insurance) to property materially adversely
             affecting the condition (financial or otherwise), assets,
             liabilities, earnings or business of ETKC;

                       (ii)  any declaration, setting aside or payment of
             any dividend, or other distribution, in respect of the
             capital stock of ETKC or any direct or indirect redemption,
             purchase or other acquisition of such stock;

                       (iii)  any issuance or sale by ETKC of any bonds
             or other corporate securities;

                       (iv)  any amendment, termination or waiver of any
             right belonging to ETKC except for amendments, terminations
             or waivers which would not have a material adverse effect
             upon the business, assets or financial condition of ETKC;

                       (v)  any increase in the compensation or benefits
             payable or to become payable by ETKC to any of its
             respective officers or employees except for ordinary
             increases for non-management employees in accordance with
             prior practice; or

                       (vi)  any other action or event not in the
             ordinary course of business.

                  (o)  Litigation or Proceedings.  To the knowledge of
        Seller and Management,  ETKC is not engaged in, or a party to, or
        threatened with, any claim or legal action or other proceeding
        before any court, arbitration panel or administrative agency, or
        any governmental investigation.  To the knowledge of Seller and
        Management, there are no orders, rulings, decrees, judgments or
        stipulations to which ETKC is a party by or with any court,
        arbitrator or administrative agency adversely affecting ETKC or
        its business or properties.  

                  (p)  Compliance with Laws.  To the knowledge of Seller
        and Management and except with respect to matters set forth in
        Sections 3.1(f) and 3.4(g) and (k), as to which no representation
        or warranty, implied or expressed, is made in this Section
        3.4(p), ETKC (i) is not in violation of any applicable building,
        zoning, occupational safety and health, or other Federal, state
        or local law, ordinance, regulation, rule, order or governmental
        policy applicable to its plants, structures or equipment or the
        operation thereof, or any employment, equal opportunity or
        similar law, ordinance, regulation, rule, order or governmental
        policy, or any other Federal, state or local law, ordinance,
        regulation, rule, order or governmental policy applicable to it,
        or to its respective business or assets; (ii) has not received

                                       23
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<PAGE>





        any complaint which is currently pending from any governmental
        authority, and none is threatened, alleging that it has violated
        any such law, ordinance, regulation, order or policy; (iii) has
        not received any notice from any governmental authority of any
        pending proceedings to take all or any part of its properties
        (whether leased or owned) by condemnation or right of eminent
        domain and no such proceeding is threatened; and (iv) is not a
        party to any agreement or instrument, or subject to any charter
        or other corporate restriction or judgment, order, writ,
        injunction, rule, regulation, code or ordinance, which has a
        material adverse effect upon the business, assets or financial
        condition of ETKC.

                  (q)  Labor Matters.  To the knowledge of Seller and
        Management, there are no labor organizing activities, election
        petitions or proceedings, labor strikes, disputes, slowdowns,
        work stoppages or unfair labor practice complaints, pending or
        threatened against ETKC or between ETKC and any of its employees,
        nor have there been any such activities or controversies within
        the two years prior to this Agreement.  To the knowledge of
        Seller and Management, no labor grievance has been filed with any
        Federal or state governmental agency and no arbitration
        proceeding has arisen out of or under collective bargaining
        agreements and is pending and no claim therefor has been
        asserted.

                  (r)  Powers of Attorney.  To the knowledge of Seller
        and Management, ETKC has no powers of attorney or similar
        authorizations outstanding.

                  (s)  No Termination of Relationship.  To the knowledge
        of Seller and Management, no relationship between ETKC and any
        distributor, customer, supplier, lender, employee or other person
        may be terminated as a result of the execution of this Agreement.

                  (t)  Backlog; Quotations.  The Disclosure Schedule
        contains an accurate list of all firm purchase orders and
        commitments for services and products that make up the backlog of
        ETKC as of approximately January 15, 1995 (other than with
        respect to the Killam division known as "Killam East," as to
        which such date is approximately December 25, 1994), as well as
        the sum of such backlog.  To the knowledge of Seller and
        Management, such orders and commitments, together with any
        quotations for work which are outstanding at this time, contain,
        in the aggregate, terms and conditions that are consistent with
        the practices of ETKC in the ordinary course of business prior to
        the Closing Date.

             Section 3.5.  Representations and Warranties of Buyer.
        Buyer represents and warrants to Seller and Management that, as
        of the Closing Date:

                  (a)  Organization and Good Standing.  Buyer is a
        corporation validly existing and in good standing under the laws

                                       24
PAGE
<PAGE>





        of the State of Delaware, and has all requisite corporate power
        and authority to own, lease and operate its properties and to
        carry on its business as it is now being conducted.  

                  (b)  Authority.   The execution and delivery of this
        Agreement by Buyer, and the consummation of the transactions
        contemplated hereby to be performed by Buyer, have been duly and
        validly authorized by all necessary corporate action on the part
        of Buyer.  This Agreement, the Note, the Custody Agreement, the
        Pledge Agreement, the Amendment Agreement and the Option
        Agreements (the "Agreements") constitute valid and binding
        obligations of Buyer enforceable against Buyer in accordance with
        the terms hereof and thereof, except as such enforceability may
        be limited by applicable bankruptcy, insolvency, reorganization,
        moratorium or other laws affecting the rights of creditors or by
        general principles of equity.  Neither the execution, delivery
        and performance of the Agreements by Buyer, nor the consummation
        of the transactions contemplated hereby or thereby will (i)
        conflict with or result in a violation, breach, termination or
        acceleration of, or default under (or would result in such a
        violation, breach, termination, acceleration or default with the
        giving of notice or passage of time, or both) any of the terms,
        conditions or provisions of the certificate of incorporation or
        bylaws of Buyer, each as amended, or of any note, bond, mortgage,
        indenture, agreement or other instrument or obligation to which
        Buyer is a party or by which Buyer or any of its properties or
        assets may be bound or affected; or (ii) result in the violation
        of any order, writ, injunction, decree, statute, rule or
        regulation applicable to Buyer or its properties or assets.
        Except for a filing under the HSR Act, and filings with certain
        states under "blue sky" laws with respect to the Buyer Options,
        no consent or approval by, or notification to or filing with, any
        court, governmental authority or third party is required in
        connection with the execution, delivery and performance of the
        Agreements by Buyer or the consummation of the transactions
        contemplated hereby.

                  (c)  Brokers and Finders.  Buyer has not employed any
        broker, agent or finder, or incur or will incur any liability for
        any brokerage fees, agents' commissions or finders' fees in
        connection with the transactions contemplated hereby.

                  (d)  Hart-Scott-Rodino Filing.  Buyer has complied in
        all material respects with all applicable requirements under the
        HSR Act, and the rules and regulations promulgated thereunder,
        relating to making, filing with and furnishing information to the
        Federal Trade Commission and the United States Department of
        Justice in connection with the transactions contemplated hereby.

                  (e)  Due Diligence; Responsibility to Notify.  Buyer
        and its representatives have been afforded access to the books,
        records and premises of ETKC and its Subsidiaries and have been
        given the opportunity to meet with officers, employees  and other
        representatives of ETKC and its Subsidiaries for the purpose of

                                       25
PAGE
<PAGE>





        obtaining information with respect to the business of ETKC and
        its Subsidiaries in order to determine whether to proceed with
        the transactions contemplated by this Agreement.  Buyer is not
        aware of any event, condition or circumstance occurring at any
        time on or prior to the Closing Date which would cause any
        representation or warranty made by Seller or Management in this
        Agreement to be misleading, inaccurate or false or which would
        constitute a violation or breach of this Agreement, and such
        failure of Buyer to so notify the other parties hereto shall
        preclude Buyer from asserting any claim against the other parties
        in respect of such matter.

                  The Pledge Agreement creates a valid security interest
        in favor of Seller in the Collateral (as such term is defined in
        the Pledge Agreement), including, without limitation, the U.S.
        Treasury security subject to the Pledge Agreement (the "Pledged
        Securities") and, upon the registration of the Custodian, as
        agent for Seller, as the owner of the Pledged Securities, Seller
        shall have a perfected first priority security interest in such
        Pledged Securities.


                                    ARTICLE 4

                                CERTAIN COVENANTS

             Section 4.1.  Expenses.  Except as may be otherwise
        expressly contemplated hereby, all expenses paid or incurred by
        any party hereto shall be borne by such party.  All sales,
        transfer or similar taxes required to be paid in respect of the
        transfer of the Shares contemplated hereby shall be the
        responsibility of Seller.  Notwithstanding the foregoing, this
        Section 4.1 shall not be construed as relieving any party from
        any liability which it may have for any breach of any
        representation or warranty made by it herein or any failure to
        perform any obligation or comply with any covenant imposed on it
        herein.

             Section 4.2.  Further Assurances.  From time to time and at
        any time after the Closing, and without further expense to the
        requesting party, each party will execute and furnish to the
        requesting party all documents and will do or cause to be done
        all other things that the requesting party may reasonably request
        in order to give full effect to this Agreement and to effectuate
        the intent of the parties.

             Section 4.3.  Confidentiality of Information.  Seller agrees
        that (a) it has obtained and may in the future obtain
        confidential and proprietary information about ETKC, Killam,
        Buyer or any parent, subsidiary or affiliate of Buyer (as the
        case may be, a "TPS Entity"),  including, but not limited to,
        business plans strategies, customer lists, and financial and
        statistical information and (b) it will not disclose, directly or
        indirectly, such information or use it for any purpose other than

                                       26
PAGE
<PAGE>





        for such TPS Entity's benefit.  The obligations of
        confidentiality in this Section 4.3 shall not apply to any
        information which (a) was known to Seller or to the public prior
        to receipt by Seller from another party hereto; (b) is or becomes
        generally available to the public other than as a breach of this
        Agreement by Seller; (c) is disclosed to Seller by a third party
        having a legal right to make such disclosure (e.g., other than by
        employees, auditors and other representatives of the parties to
        this Agreement); or (d) is required to be disclosed in compliance
        with applicable law or legal process.  The obligations under this
        Section 4.3 shall terminate on the second anniversary of the
        Closing Date.

                  Seller agrees that damages are an inadequate remedy for
        any breach of this Section 4.3 and that Buyer shall, whether or
        not it is pursuing any potential remedies at law, be entitled to
        equitable relief in the form of preliminary and permanent
        injunctions without bond or other security upon any actual or
        threatened breach hereof.

             Section 4.4.  Releases.  

                  (a)  Seller hereby releases, holds harmless and forever
        discharges ETKC and Killam, their respective successors, assigns,
        agents, servants, employees, principals, directors, officers,
        administrators, stockholders, affiliates, subsidiaries and
        related companies, including, without limitation, Management, of
        and from any and all actions, causes of action, claims, demands,
        costs, liabilities, losses, expenses and compensation, past,
        present or future, known or unknown, which it ever had, now has
        or may have against any of the foregoing arising from actions,
        omissions, circumstances or conditions that existed on or prior
        to the Closing Date; provided, however, that nothing contained in
        this Section 4.4(a) shall be deemed to relieve ETKC or Management
        of any obligation imposed on it or them by this Agreement; and
        further provided, that nothing contained in this Section 4.4(a)
        shall be deemed to relieve ETKC of its obligation to pay when due
        loans payable by ETKC to Nord Est Finance in the principal amount
        of $1,500,000.  This release is binding on Seller's agents,
        servants, employees, affiliates, related companies, assigns and
        successors in interest.

                  (b)  Management hereby releases, holds harmless and
        forever discharges Seller, ETKC and Killam, and their respective
        successors, assigns, agents, servants, employees, principals,
        directors, officers, administrators, stockholders, affiliates,
        subsidiaries and related companies of and from any and all
        actions, causes of action, claims, demands, costs, liabilities,
        losses, expenses and compensation, past, present or future, known
        or unknown, which it ever had, now has or may have against any of
        the foregoing arising from actions, omissions, circumstances or
        conditions that existed on or prior to the Closing Date,
        including without limitation any claim for or with respect to any
        portion of the Purchase Price; provided, however, that nothing

                                       27
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<PAGE>





        contained in this Section 4.4(b) shall be deemed to relieve
        Seller, ETKC or Killam of any obligation imposed on them by this
        Agreement.  This release is binding on Management's agents,
        servants, employees, affiliates, related companies, assigns and
        successors in interest.

                  (c)  ETKC hereby releases, holds harmless and forever
        discharges, and concurrently with the execution and delivery of
        this Agreement, ETKC shall cause each of its Subsidiaries to
        release, hold harmless and forever discharge, Seller, Management
        and their successors, assigns, agents, servants, employees,
        principals, directors, officers, administrators, stockholders,
        affiliates, subsidiaries and related companies of and from any
        and all actions, causes of action, claims, demands, costs,
        liabilities, losses, expenses and compensation, past, present or
        future, known or unknown, which it ever had, now has or may have
        against Seller or Management arising from actions, omissions,
        circumstances or conditions that existed on or prior to the
        Closing Date; provided, however, that nothing contained in this
        Section 4.4(c) shall be deemed to relieve Seller or Management of
        any obligation imposed on them by this Agreement.  This release
        is binding on ETKC's agents, servants, employees, affiliates,
        related companies, assigns and successors in interest.

             Section 4.5.  Covenant Against Competition; Solicitation and
        Hiring of Former Employees.  For a period of five years after the
        Effective Date, Seller shall not, directly or indirectly:

                  (a)  engage in any business that provides any services
        or products competitive with those offered by ETKC or Killam as
        of the Effective Date in the states of Alabama, New Jersey, New
        York, Ohio and/or Pennsylvania, or 

                  (b)  without the prior written consent of Buyer, (i)
        solicit any person employed by ETKC or Killam (or any of their
        affiliates) on the Effective Date to terminate his employment
        with ETKC or Killam (or any of such affiliates) or to become an
        employee of Seller or any affiliate of Seller, or (ii) hire any
        such employee except Eugene Leventis and except for employees
        involuntarily terminated by ETKC or Killam (or any of their
        affiliates).

                  The parties hereto agree that the scope, duration and
        geographic area of the covenant against competition set forth in
        Section 4.5(a) above are reasonable.  If any court of competent
        jurisdiction determines that the scope, duration or geographic
        area are unreasonable and that such provision is to that extent
        unenforceable, the parties hereto agree that the provision shall
        remain in full force and effect for the greatest scope, the
        greatest time period and in the greatest area that would not
        render it unenforceable.  The parties intend that such
        noncompetition provision shall be deemed to be a series of
        separate covenants, one for each and every county of each and
        every state in which this provision is intended to be effective.

                                       28
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<PAGE>






                  Seller agrees that damages are an inadequate remedy for
        any breach of this Section 4.5 and that Buyer shall, whether or
        not it is pursuing any potential remedies at law, be entitled to
        equitable relief in the form of preliminary and permanent
        injunctions without bond or other security upon any actual or
        threatened breach hereof.  The parties acknowledge that for
        purposes of this Section 4.5, the prohibitions on Seller shall
        apply to Nord Est S.A. only.

             Section 4.6.  Payment of Certain Indebtedness.  Buyer hereby
        irrevocably and unconditionally covenants to cause and guarantee
        that (a) ETKC shall pay the loan payable by ETKC to Nord Est
        Finance in the principal amount of $1,500,000, together with
        accrued interest thereon, when and as due, and (b) Killam shall
        pay the loans payable by Killam to Banque Nationale de Paris
        ("BNP") (i) in the principal amount of $200,000, pursuant to the
        Term Loan Agreement dated February 27, 1987 between Killam and
        BNP, together with accrued interest thereon, when and as due, and
        (ii) outstanding as of the Closing Date pursuant to the Revolving
        Credit Facility dated March 31, 1994 between Killam and BNP
        together with accrued interest thereon, when and as due. 

             Section 4.7.  Tax Matters.

                  (a)  Seller shall prepare or cause to be prepared when
        due all returns in respect of Federal Income Taxes and Taxes of
        ETKC and its Subsidiaries for any taxable years or periods ending
        on or prior to the Closing Date in accordance with ETKC's and its
        Subsidiaries' past custom and practice.  Seller shall allow Buyer
        opportunity to review and comment on such returns.  In the case
        of any such return, Buyer shall cause ETKC and its Subsidiaries
        to sign and file such returns and pay any Federal Income Tax and
        Tax due on a timely basis upon delivery by Seller of the
        completed return to Buyer and receipt of payment from Seller of
        any Federal Income Tax and Tax shown as due on such return, 

                       (i)  reduced by the amount of such Federal Income
             Taxes and Taxes that have been accrued for or reserved
             against in the Effective Date Balance Sheet, 

                       (ii)  reduced by the amount of any estimated
             payments of Federal Income Taxes or Taxes, as the case may
             be, and

                       (iii)  with respect to Federal Income Taxes and
             Taxes of ETKC and its Subsidiaries attributable to the
             taxable period beginning January 1, 1995 and ending on the
             Closing Date (the "Straddle Period"), reduced (or increased)
             by the amount by which the Federal Income Taxes or Taxes (as
             the case may be) of ETKC and its Subsidiaries attributable
             to the Straddle Period (which amount shall not be less than
             zero) exceed (or are less than) the Federal Income Taxes or
             Taxes (as the case may be) that would have been imposed on

                                       29
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<PAGE>





             ETKC and its Subsidiaries with respect to a taxable year
             beginning January 1, 1995 and ending on the Effective Date,
             determined in accordance with ETKC's and its Subsidiaries'
             past custom and practice; provided, that any expenses
             incurred by ETKC and its Subsidiaries within the Straddle
             Period in connection with the transactions contemplated by
             this Agreement (including, without limitation, brokerage,
             accounting, attorneys' fees and compensatory payments made
             to Management) shall be deemed to have been accrued on the
             day prior to the Effective Date, regardless of when actually
             accrued, but only to the extent that such expenses are
             accrued on the Effective Date Balance Sheet; and provided
             further that notwithstanding anything in this Agreement to
             the contrary and for the purposes of the avoidance of doubt,
             any additional amount payable by Seller to Buyer pursuant to
             this clause (iii) shall be deemed to be a payment with
             respect to Seller's obligation, if any, under Article 5 to
             indemnify the Buyer in respect of any Federal Income Taxes
             or Taxes incurred with respect to any Straddle Period to the
             extent that any net tax loss which is attributable to the
             portion of the Straddle Period following the Effective Date
             and which resulted in the payment of such additional amount
             is disallowed.

                  (b)  Buyer and the Seller shall cooperate fully, as and
        to the extent reasonably requested by the other party, in
        connection with the preparation and filing of Federal Income Tax
        and Tax Returns pursuant to this Section 4.7 and any audit,
        litigation or other proceeding with respect to Federal Income
        Taxes and Taxes.  Such cooperation shall include the retention
        and (upon the other party's request) the provision of records,
        files, books, documents and information which are reasonably
        relevant to any such preparation, filing, audit, litigation or
        other proceeding and making employees available on a mutually
        convenient basis to provide additional information and
        explanation of any material provided hereunder.  Buyer agrees to
        retain all books, files, documents, information and records with
        respect to Federal Income Tax and Tax matters pertinent to ETKC
        and its Subsidiaries relating to any tax periods ending on or
        prior to the Closing Date and any tax periods beginning before
        the Closing Date and ending after the Closing Date until the
        expiration of any applicable statute of limitations or extensions
        thereof.

                  (c)  Any refunds or credits of Federal Income Taxes and
        Taxes (including interest thereon) received by or credited to
        ETKC or any of its Subsidiaries attributable to taxable years or
        periods ending on or before the Effective Date (not including any
        refund or credit attributable to the carryback of losses,
        credits, or other items attributable to taxable years or periods
        ending after the Effective Date) shall be for the benefit of
        Seller, and Buyer shall use its best efforts to obtain such
        refunds and shall cause ETKC and its Subsidiaries to pay over to
        Seller any such refunds immediately upon receipt thereof;

                                       30
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        provided that notwithstanding anything to the contrary in the
        foregoing, all other refunds or credits shall be for the benefit
        of Buyer; provided further that, for purposes of this Section
        4.7(c), any taxable year or period beginning before the Effective
        Date and ending after the Effective Date (x) shall be deemed to
        consist of two hypothetical taxable years, the first taxable year
        ending on the Effective Date and the second beginning immediately
        after the Effective Date; (y) items of income, loss, credit or
        other items shall be apportioned between such two hypothetical
        taxable years on the basis of a closing of the books of ETKC and
        Subsidiaries as of the end of the Effective Date; and (z) any
        expenses incurred by ETKC and its Subsidiaries within the
        Straddle Period in connection with the transactions contemplated
        by this Agreement (including, without limitation, brokerage,
        accounting, attorneys' fees and compensatory payments made to
        Management) shall be deemed to have been accrued on the day prior
        to the Effective Date, regardless of when actually accrued, but
        only to the extent that such expenses are accrued on the
        Effective Date Balance Sheet.

             Section 4.8.  Maintenance of Certain Insurance Policies;
        Additional Insurance.  Buyer covenants to maintain in full force
        and effect all liability insurance policies, including without
        limitation professional liability insurance policies, maintained
        by ETKC or any of its subsidiaries as of the Effective Date (or
        to maintain in full force and effect equivalent policies) for a
        period of not less than two years after the Effective Date,
        provided that such insurance is available to Buyer on
        commercially reasonable terms.  If such insurance is available to
        Buyer on commercially reasonable terms, but is not so maintained,
        then Damages, as such term is defined in Section 5.6, shall not
        include any amount which would have been recoverable from the
        insurer had such insurance policies been maintained.  If Buyer
        shall cause ETKC to cancel any such insurance policies, Buyer
        shall provide Seller and Management with thirty (30) days prior
        written notice of such cancellation.  Notwithstanding the
        foregoing, Buyer reserves the right at any time and from time to
        time to increase the deductibles under any such policies,
        provided that Damages, as such term is defined in Section 5.6,
        shall not include the amount of any increase in such deductibles.
        Buyer further covenants to use reasonable efforts to increase the
        amount of professional liability insurance coverage maintained by
        ETKC to not less than $10,000,000 and to make such increase
        retroactive for a period of five years prior to the Effective
        Date, provided in each case that such additional insurance is
        available to Buyer on commercially reasonable terms, and
        provided, further, that the cost of such additional expense shall
        not be accrued as an expense or capitalized on the Effective Date
        Balance Sheet in determining the Net Tangible Book Value of ETKC
        as of the Effective Date.

             Section 4.9.  Certain Compensation and Related Matters.
        Buyer covenants solely with Management as follows:


                                       31
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                  (a)  Management Base Salaries.  Buyer will continue to
        pay Management after the Closing at rates equal to their base
        salaries in effect as of the Effective Date.  Such base salaries
        will be subject to review annually in accordance with Buyer's
        standard policies.  Management acknowledges that (i) such
        policies will require, among other things, that salary
        recommendations be approved by both the Compensation Committee of
        Buyer's Board of Directors and the Operating Committee of Thermo
        Electron and (ii) because Buyer reviews salaries annually after
        the end of its fiscal year, Buyer intends to move toward a single
        annual salary review for Management, as soon as is consistent
        with proper and equitable implementation.  Nothing in this
        Section 4.9(a) or elsewhere in this Agreement is intended to
        confer upon any member of Management any right to continued
        employment.

                  (b)  Cash Bonuses.  Buyer will pay such cash bonuses to
        management personnel of Killam and its Subsidiaries, including
        Management, with respect to calendar year 1994 in the amount of
        $700,000 and with respect to the period from January 1, 1995
        through the Effective Date in the amount of $30,000, which
        amounts will be accrued on the Effective Date Balance Sheet
        pursuant to Section 1.3(d).  The timing of the payment of such
        bonuses shall be consistent with Killam's past practices.  Buyer
        will pay cash bonuses to management personnel of Killam and its
        Subsidiaries, including Management, with respect to calendar year
        1995 at the rate of 12% of the pretax income of Killam and its
        Subsidiaries after payment of the annual management fee to Thermo
        Electron, but without reduction for the amortization of the
        increased goodwill on Buyer's books associated with the
        acquisition of ETKC.  Management acknowledges that the management
        fee referred to in the preceding sentence is a fee paid by all
        subsidiaries of Thermo Electron, that such fee currently equals
        1.25% of each subsidiary's gross revenues, and that such fee may
        be changed by mutual agreement of Thermo Electron and Buyer.
        Bonuses with respect to calendar year 1995 not accrued for on the
        Effective Date Balance Sheet will be prorated from the Effective
        Date through December 31, 1995.  Buyer and Management agree to
        discuss late in calendar 1995 or early in calendar 1996 the terms
        on which bonuses with respect to calendar years 1996 and beyond
        would be paid to management personnel of Killam and its
        Subsidiaries.  Management acknowledges, however, that such
        bonuses would be (a) linked to meeting certain minimum pretax
        income expectations to be determined prior to the beginning of
        each year and (b) paid as a percentage of the pretax income of
        Killam and its Subsidiaries, after (i) amortizing not more than
        $750,000 of the increased goodwill (excluding amortization of the
        building intangible) on Buyer's books associated with acquisition
        of ETKC and (ii) payment of the annual management fee to Thermo
        Electron.  Buyer agrees that neither (i) interest payable or
        accrued with respect to the Note nor (ii) any compensation
        charges for tax and/or financial accounting purposes attributable
        to the exchange of the Killam Options, the exercise of any Buyer
        Options and the payment of the option exercise price therefor

                                       32
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        will be charged against the income of Killam and its Subsidiaries
        for purposes of calculating the payment of bonuses.

                  (c)  Floor Price on Buyer Shares.  In the event that
        any member of Management desires to sell in the open market any
        or all of the shares of Buyer's common stock that may be issued
        upon exercise of the Buyer Options at any time prior to January
        29, 2002, (subject to the resale restrictions in the
        Shareholders' Agreement and the Amendment Agreement) but cannot
        do so at prices equal to at least $8.00 per share, as adjusted
        for stock dividends, stock splits, reclassifications and similar
        events (the "Floor Price"), Buyer will either, in its discretion,
        buy any such shares that cannot be sold for at least the Floor
        Price for an amount equal to the Floor Price or (ii) permit such
        member of Management to sell such shares in the open market at
        such price or prices as may be obtainable and pay to such member
        an amount which is equal to the difference between the Floor
        Price and the amount which such member received (before taking
        into account commissions, taxes and other transaction costs) upon
        such sales.  Each member of Management agrees, as a condition to
        such agreements by Buyer, to give Buyer reasonable prior written
        notice of any such intention to sell such shares and to consult
        with Buyer as to the timing of such sales.

                  (d)  Grants of Additional Options.  Within 60 days
        after the Closing, Buyer will grant options to purchase an
        aggregate of 500,000 shares of Buyer's common stock to such
        persons, and in such amounts, as may be mutually agreeable to
        Management and Buyer.  All such options (i) will be granted
        pursuant to Buyer's Equity Incentive Plan, a copy of which has
        been previously provided to Management, (ii) will be evidenced by
        stock option agreements in substantially the form of Exhibit H
        hereto, and (iii) will be exercisable at a price equal to the
        fair market value of the stock on the date of approval by the
        Board of Directors.

                  (e)  Retirement Plans.  To the extent permitted by
        ERISA and other applicable law, (i) Killam's employees will
        continue to participate in Killam's existing Salaried Employees
        Savings and Investment Plan (the "401(k) Plan"), and (ii) Killam
        will continue to be permitted to make matching contributions to
        the 401(k) Plan in accordance with the terms of such plan.  As
        soon as practicable after the Closing, Buyer will cause the
        401(k) Plan to be amended so that it will conform to the
        description set forth on Exhibit I hereto (the "Plan Amendment").
        Buyer explicitly reserves the right, however, to further amend
        the 401(k) Plan from time to time to change the annual
        profit-sharing contribution from the amount set forth in the Plan
        Amendment after consultation with Management.  

                  (f)  Employee Stock Purchase Plan.  All otherwise
        eligible Killam employees, including Management, will be entitled
        to participate in any employee stock purchase plan adopted from
        time to time by Buyer, in accordance with the terms thereof.

                                       33
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<PAGE>





         
                  (g)  Post-Retirement Medical Plan.  As soon as
        practicable after the Closing, Buyer will cause Killam's
        post-retirement medical plan to be amended so that it will
        conform to the description set forth on Exhibit I hereto.

                  (h)  Defined Benefit Retirement Plan.  As soon as
        practicable after the Closing, Buyer shall, at its discretion,
        either terminate or freeze Killam's current defined benefit
        retirement plan, consistent with the description set forth on
        Exhibit I hereto.  

                  (i)  Other Employee Benefit Policies and Programs.
        Except as otherwise provided in this Section 4.9 and except to
        the extent required by applicable law from time to time, Thermo
        will not make any material changes in any employee benefit
        policies and programs of Killam and its Subsidiaries, such as
        vacation policies, life insurance programs and health insurance
        programs, for a period of two years after the Closing.  If, as a
        result of changes to the employee benefit policies and programs
        applicable to Buyer's other employees over such two-year period,
        material differences between such policies and programs and the
        policies and programs of Killam and its Subsidiaries develop or
        are identified, Buyer reserves the right thereafter to require
        such policies and programs to be conformed to Buyer's policies
        and programs.  

             Section 4.10.  Certain Environmental Matters.  

                  Buyer shall, in its sole discretion, determine within
        one year after the Effective Date whether any further action is
        required as a result of certain groundwater sampling conducted on
        the Killam property at 21-27 Bleeker Street in Millburn, New
        Jersey, during Buyer's due diligence process.  

                  Irrespective of any further sampling and investigation,
        if at any time prior to the fifth anniversary of the Effective
        Date Killam shall be required by any applicable governmental
        agency to take corrective or remedial action with regard to
        perchloroethelyne or trichloroethylyne at 21-27 Bleeker Street in
        Millburn, New Jersey discovered during Buyer's due diligence
        process, then (a) Buyer shall notify Seller and Management of
        such request and (b) within ten days after presentation of
        Buyer's statement or statements setting forth its out-of-pocket
        costs incurred in connection with any monitoring, reporting
        and/or remediation in response to such agency's requirements,
        Seller shall pay to Buyer 89% of the amounts set forth on such
        statement or statements and Management shall pay to Buyer 11% of
        the amounts set forth on such statement or statements;  provided,
        however, that the aggregate liability of Seller and Management to
        Buyer under this Section 4.10 shall be $200,000.

             Section 4.11.  Management Bonuses.  Seller covenants with
        Buyer and Management that it will accrue cash bonuses for

                                       34
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<PAGE>





        management personnel of Killam and its subsidiaries, including
        Management, on the Effective Date Balance Sheet in the amount of
        $700,000 for 1994 and $30,000 for the period from January 1, 1995
        through the Effective Date.


                                    ARTICLE 5

                                 INDEMNIFICATION

             Section 5.1.  Indemnification by Seller.  Subject to the
        provisions of Section 5.3, Buyer upon its demand shall be
        indemnified by Seller for all Damages (as defined in Section 5.6
        below) suffered by Buyer as a result of:

                  (i)  the inaccuracy of any representation or warranty
             made by Seller in this Agreement (including Sections 3.1 and
             3.4) or in any other document executed by Seller at the
             Closing; and

                  (ii)  any failure by Seller to perform any obligation
             of Seller, or to comply with any covenant or agreement of
             Seller, specified herein (including without limitation the
             covenants set forth in Article 4) or in any other document
             executed by Seller at the Closing.

                  Buyer shall give Seller prompt notice of any claim,
        action or proceeding by a third party which is reasonably likely
        to result in a claim for indemnification under this Section 5.1.
        Subject to the provisions of Section 5.2.A, Seller shall have the
        right, at its expense and with counsel selected by Seller, to
        defend, contest, protest, settle and otherwise control the
        resolution of any such claim, action or proceeding.  Seller shall
        keep Buyer apprised of developments with respect to any such
        claim, action or proceeding, and Buyer shall have the right to
        consult with Seller, and to participate therein, subject to
        Seller's right of control thereof, at Buyer's expense and with
        counsel selected by Buyer.  If Seller shall notify Buyer that
        Seller has elected to assume any such defense, contest or
        protest, Seller shall not be liable to Buyer hereunder for any
        legal or other expense subsequently incurred by Buyer in
        connection therewith.

             Section 5.2.  Indemnification by Management.  Subject to the
        provisions of Section 5.3, Buyer upon its demand shall be
        indemnified by Management for all Damages suffered by Buyer as a
        result of:

                  (i)  the inaccuracy of any representation or warranty
             made by Management in this Agreement (including Sections 3.2
             and 3.4) or in any other document executed by Management at
             the Closing; and



                                       35
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<PAGE>





                  (ii)  any failure by Management to perform any
             obligation of Management, or to comply with any covenant or
             agreement of Management, specified herein (including without
             limitation the covenants set forth in Article 4) or in any
             other document executed by Management at the Closing.

                  Buyer shall give Management prompt notice of any claim,
        action or proceeding by a third party which is reasonably likely
        to result in a claim for indemnification under this Section 5.2.
        Subject to the provisions of Section 5.2.A, Management shall have
        the right, at its expense and with counsel selected by
        Management, to defend, contest, protest, settle and otherwise
        control the resolution of any such claim, action or proceeding.
        Management shall keep Buyer apprised of developments with respect
        to any such claim, action or proceeding, and Buyer shall have the
        right to consult with Management, and to participate therein,
        subject to Management's right of control thereof, at Buyer's
        expense and with counsel selected by Buyer.  If Management shall
        notify Buyer that Management has elected to assume any such
        defense, contest or protest, Management shall not be liable to
        Buyer hereunder for any legal or other expense subsequently
        incurred by Buyer in connection therewith.

             Section 5.2.A  Defense of Claim Involving Joint Liability.
        Buyer shall give Management and Seller prompt notice of any
        claim, action or proceeding by a third party which is reasonably
        likely to result in a claim for indemnification against both
        Seller and Management under this Article 5.  Seller shall have
        the right, at its expense and with counsel selected by Seller, to
        defend, contest and protest any such claim, and Management shall
        have the right, at its expense and with counsel selected by
        Management, to consult with Seller and to participate in (but not
        control) the defense of such claim, action or proceeding by a
        third party; provided that  Management shall have the right, at
        their expense, to defend, contest, protest, settle and otherwise
        control the resolution of any such claim, which Seller has
        declined to defend.  The defending party shall keep the other
        parties apprised of developments with respect to any such claim,
        action or proceeding.  If either Seller or Management proposes to
        settle any such claim for which Seller and Management are jointly
        responsible, such party shall notify the other party in writing
        of the terms of such proposed settlement.  If the party receiving
        the notice objects to such settlement terms, then it may take
        over and continue, at its own expense, the defense of such third
        party claim, but only if the party proposing the settlement is
        then released by such third party from any liability in respect
        of such claim in excess of the amount it would have paid in such
        proposed settlement.  If the defending party shall notify Buyer
        that the defending party has elected to assume any such defense,
        contest or protest, it shall not be liable to Buyer hereunder for
        any legal or other expense subsequently incurred by Buyer in
        connection therewith.



                                       36
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<PAGE>





             Section 5.3.  Limitation of Liability of Seller and
        Management.  

                  (a)  Except as set forth below, the right of Buyer to
        be indemnified pursuant to Sections 5.1(i) and 5.2(i) shall not
        apply until the sum of the Damages suffered by Buyer on a
        cumulative basis exceeds $250,000, in which case Buyer shall be
        entitled to recover 100% of the Damages suffered in excess of
        $250,000 (subject to the remainder of this Section 5.3).   
        Notwithstanding the foregoing, Buyer shall be entitled to recover
        the Damages suffered by it with respect to claims based solely on
        representations and warranties in Section 3.1(f), irrespective of
        whether such Damages equal or exceed $250,000.  Notwithstanding
        the terms of this Section 5.3(a), no liability of Seller or
        Management to Buyer pursuant to Section 4.10 hereof shall be
        considered to be Damages for purposes of the first sentence of
        this Section 5.3(a).    

                  (b)   The right of Buyer to be indemnified pursuant to
        Section 5.1(i) shall:

                  (i)  apply to claims based solely on representations
             and warranties in Section 3.1 (other than (A) the first two
             sentences of Section 3.1(a), (B) the first five sentences of
             Section 3.1(d) and (C) Section 3.1(f)) and Section 3.4
             (other than (A) the first two sentences of Section 3.4(a)
             and (B) the first five sentences of Section 3.4(b)) only if
             asserted by Buyer before the second anniversary of the
             Effective Date; and 

                       (ii)  apply to claims based solely on
             representations and warranties in Section 3.1(f) only if
             asserted by Buyer before any applicable statute of
             limitations for unpaid Income Taxes and Taxes, respectively,
             shall expire.  

                  (c)   The right of Buyer to be indemnified pursuant to
        Section 5.2(i) shall apply to claims based solely on
        representations and warranties in Section 3.4 (other than (A) the
        first two sentences of Section 3.4(a) and (B) the first five
        sentences of Section 3.4(b)) only if asserted by Buyer before the
        second anniversary of the Effective Date.  

                  (d)  The right of Buyer to be indemnified pursuant to
        Sections 5.1(ii) and 5.2(ii), and with respect to any claim under
        (A) the first two sentences of Section 3.1(a), (B) Section
        3.1(b), (C) the first five sentences of Section 3.1(d), (D)
        Section 3.2, (E) the first two sentences of Section 3.4(a) and
        (F) the first five sentences of Section 3.4(b) shall survive the
        execution of this Agreement indefinitely.

                  (e)  Seller shall not be liable for more than 80% of
        the Damages arising out of or in connection with the breach of
        any representation or warranty set forth in Section 3.4 or for

                                       37
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        Damages pursuant to Section 5.1(i) in excess of $16,000,000 in
        the aggregate, except for (i) claims based solely on
        representations and warranties in (A) the first two sentences of
        Section 3.1(a), (B) the first five sentences of Section 3.1(d),
        (C) the first two sentences of Section 3.4(a) and (D) the first
        five sentences of Section 3.4(b), with respect to which Seller's
        liability for Damages shall be unlimited, and (ii) except for
        claims based solely on representations and warranties in Section
        3.1(f), with respect to which Seller's liability shall be equal
        to 100% of the Damages, but shall be subject to such $16,000,000
        aggregate liability limit.  Seller's aggregate liability limit as
        described in this Section 5.3(e) shall not be increased by any
        third party claim.

                  (f)  Management shall not be liable for more than 10%
        of the Damages arising out of or in connection with the breach of
        any representation or warranty set forth in Section 3.4 or
        Damages pursuant to Section 5.2(i) in excess of $1,200,000 in the
        aggregate, except for claims based solely on representations and
        warranties in (A) Section 3.2, (B) the first two sentences of
        Section 3.4(a) and (C) the first five sentences of Section
        3.4(b), with respect to which Management's liability for Damage
        shall be unlimited; and no member of Management shall be liable
        for Damages pursuant to Section 5.2(i) (except for claims based
        solely on representations and warranties in (A) Section 3.2, (B)
        the first two sentences of Section 3.4(a) and (C) the first five
        sentences of Section 3.4(b), with respect to which each member of
        Management's liability for Damages shall be unlimited) in excess
        of (i) $1,200,000 multiplied by (ii) a fraction, the numerator of
        which equals the value of the Buyer Options and Killam Cash
        Consideration set forth opposite such member's name in Columns 3
        and 4, respectively, of Schedule 1.5 hereto, and the denominator
        of which equals the aggregate value of all of the Buyer Options
        and Killam Cash Consideration set forth opposite all members of
        Management's names in Columns 3 and 4, respectively, of such
        Schedule 1.5.   Management's aggregate liability limit as
        described in this Section 5.3(f) shall not be increased by any
        third party claim.

                  (g)  Notwithstanding anything to the contrary in this
        Agreement, in any case in which Seller and Management shall be
        jointly liable for Damages under this Article 5, Seller shall not
        be liable for any Damages pursuant to Section 5.3(e) unless
        Management is jointly liable for such Damages pursuant to Section
        5.3(f); and Management shall not be liable for any Damages
        pursuant to Section 5.3(f) unless Seller is jointly liable for
        such Damages pursuant to Section 5.3(e), and neither Seller nor
        Management shall have the right of contribution against the
        other, absent fraud, for any sum in excess of their percentage of
        such joint liability as provided in this Article 5.  In the event
        that Seller and Management are both liable for Damages for any
        claim of Buyer under this Article 5, Buyer shall pursue such
        claim against both Seller and Management for the full amount of
        their respective Damages.   

                                       38
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<PAGE>






             Section 5.4.  Indemnification by Buyer.  Subject to the
        provisions of Section 5.5, Seller and Management upon their
        respective demand shall be indemnified by Buyer for all Damages
        suffered by such parties as a result of

                  (i)  the inaccuracy of any representation or warranty
             made by Buyer in this Agreement (including Section 3.5) or
             in any other document executed by Buyer at the Closing; and

                  (ii)  any failure by Buyer to perform any obligation of
             Buyer, or to comply with any covenant or agreement of Buyer,
             specified herein (including without limitation the covenants
             set forth in Article 4) or in any other document executed by
             Buyer at the Closing.

                  The party seeking indemnification shall give Buyer
        prompt notice of any claim, action or proceeding by a third party
        which is reasonably likely to result in a claim for
        indemnification under this Section 5.4.  Buyer shall have the
        right, at its expense, to defend, contest, protest, settle and
        otherwise control the resolution of any such claim, action or
        proceeding.  Buyer shall keep the party seeking indemnification
        apprised of developments with respect to any such claim, action
        or proceeding, and such party shall have the right to consult
        with Buyer, and to participate therein, subject to Buyer's right
        of control thereof, at such party's expense and with counsel
        selected by such party.  If Buyer shall notify the party seeking
        indemnification that Buyer has elected to assume any such
        defense, contest or protest, Buyer shall not be liable to such
        party hereunder for any legal or other expense subsequently
        incurred by such party in connection therewith.

             Section 5.5.  Limitation of Liability of Buyer.  

                  (a)  The right of Seller and Management to be
        indemnified pursuant to Section 5.4(i) shall not apply until the
        sum of the Damages suffered by Seller and Management on a
        cumulative basis exceeds $250,000, in which case Seller, which
        shall be entitled to recover 80% of excess Damages, and
        Management, which shall be entitled to recover 10% of such excess
        Damages, shall together be entitled to recover 90% of the Damages
        suffered in excess of $250,000 (subject to the remainder of this
        Section 5.5 and except for Damages suffered by Seller due to
        nonpayment of the Note or breach by Buyer of its covenants in
        Section 4.6, in which case Seller shall be entitled to recover
        100% of such Damages).

                  (b)   The right of Seller and Management to be
        indemnified pursuant to Section 5.4(i) shall apply to claims
        based solely on representations and warranties in Section 3.5
        (other than Section 3.5(a) and the first two sentences of Section
        3.5(b)) only if asserted by the party seeking indemnification
        before the second anniversary of the Effective Date.

                                       39
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<PAGE>






                  (c)  The right of Seller and Management to be
        indemnified pursuant to Section 5.4(ii) and with respect to any
        claim under Section 3.5(a) or the first two sentences of Section
        3.5(b) shall survive the execution of this Agreement
        indefinitely.

                  (d)   In no event shall Buyer be liable for Damages (i)
        sustained by Seller in excess of $16,000,000 in the aggregate
        (except for Damages suffered by Seller due to nonpayment of the
        Note or breach by Buyer of its convenants in Section 4.6, in
        which case Buyer shall be liable for 100% of such Damages) or
        (ii) sustained by Management in excess of $1,200,000 in the
        aggregate; provided, however, that nothing in this Section 5
        shall limit the liability of Buyer to indemnify Seller in respect
        of any claim asserted by a third party against Seller which is
        the proper subject of indemnification hereunder if the claim
        exceeds the limits set forth in this Section 5.5(d).

             Section 5.6.  Definition of "Damages."  For the purpose of
        this Article 5, the term "Damages" (a) shall be determined and
        computed by reference to the effect of the compensable event on
        the party or parties entitled thereto, (b) shall mean the amount
        finally determined by reason of a settlement or by other final
        resolution of the claim, and (c) shall be deemed to include (i)
        all losses, liabilities, expenses or costs incurred by such party
        or parties, including reasonable attorneys' fees, but after
        reduction for all amounts recovered from any insurer or other
        party liable for such Damages (it being understood that the
        indemnified party shall use all reasonable efforts to effect any
        such recovery) and after reduction for any tax benefit allowable
        as a result of the facts giving rise to the claim for
        indemnification, and (ii) interest at a rate per annum equal to
        that announced from time to time by First National Bank of Boston
        as its "base rate" (or the legal rate of interest, if lower) from
        the date on which the amount of Damages is determined by reason
        of a settlement or by another final resolution of the claim.

             Section 5.7.  Limitation of Liability.  The liability of
        Seller, Management and Buyer for money damages for the failure to
        fulfill any covenant or agreement contained in this Agreement or
        for the inaccuracy of any representation or warranty set forth in
        this Agreement, and the source of recovery on account of any such
        liability, shall be limited as provided for in this Article 5.
        Nothing in this Article 5 shall limit the right of any party
        hereto to seek rescission of this Agreement or other equitable
        relief.

             Section 5.8.  Purchase Price Adjustment.  As between Buyer
        and Seller, except as may otherwise be required by generally
        accepted accounting principles, all amounts paid pursuant to this
        Article 5 shall be treated by the parties as an adjustment to the
        Purchase Price. 


                                       40
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<PAGE>





                                    ARTICLE 6

                                     GENERAL

             Section 6.1.  Notices.  All notices, requests, demands,
        consents and other communications which are required or permitted
        hereunder shall be in writing, and shall be deemed given when
        actually received or if earlier, two days after deposit with the
        U.S. postal authorities, certified or registered mail, return
        receipt requested, postage prepaid or two days after deposit with
        an internationally recognized air courier or express mail,
        charges prepaid, addressed as follows:

             If to Buyer, ETKC or Killam:

                  Thermo Process Systems Inc.
                  c/o Thermo Electron Corporation
                  81 Wyman Street
                  Waltham, Massachusetts  02254-9046
                  Attention:  President

             With a copy to:

                  Thermo Electron Corporation
                  81 Wyman Street
                  Waltham, Massachusetts  02254
                  Attention:  General Counsel

             If to Seller:

                  Nord Est S.A.
                  10 Rue d'Athenes
                  75009 Paris, France
                  Attention:  Michel Jacquet

             With a copy to:

                  Sutherland, Asbill & Brennan
                  1270 Avenue of the Americas
                  New York, New York  10020-3247
                  Attention:  Burton K. Haimes, Esq.

             If to Management:

                  Mr. Emil C. Herkert
                  Killam Associates Inc.
                  27 Bleeker Street
                  P. O. Box 32
                  Millburn, New Jersey  07041-0032

             With copies to:

                  Norris, McLaughlin & Marcus
                  721 Route 202-206

                                       41
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<PAGE>





                  P. O. Box 1018
                  Somerville, New Jersey  08876-1018
                  Attention: John J. Eagan, Esq.

                  and

                  Thermo Electron Corporation
                  81 Wyman Street
                  Waltham, Massachusetts  02254
                  Attention:  General Counsel

        or to such other address as any party hereto may designate in
        writing to the other parties, specifying a change of address for
        the purpose of this Agreement.

             Section 6.2.  Survival of Representations and Warranties.
        Each of the representations and warranties made by the parties
        hereto shall survive the Closing and the consummation of the
        transactions contemplated hereby in accordance with, and to the
        extent set forth in, Article 5 hereof.  

             Section 6.3.  Entire Agreement.  This Agreement, the Letter
        Agreement and the other agreements contemplated to be signed by
        the parties at the Closing supersede any and all oral or written
        agreements or understandings heretofore made relating to the
        subject matter hereof (including without limitation the letter of
        intent executed by Buyer and Seller and the letter regarding
        Management compensation issues executed by Buyer and Management,
        each dated November 4, 1994) and collectively constitute the
        entire agreement of the parties relating to the subject matter
        hereof.

             Section 6.4.  Modification; Waiver.  This Agreement may be
        amended, modified or supplemented by a writing signed by the
        party or parties against whom enforcement of the amendment,
        modification or supplement is sought.  Any party hereto may, by a
        written signed instrument, extend the time for or waive the
        performance of any of the obligations of another party hereto or
        waive compliance by such other party with any of the covenants or
        conditions contained herein.

             Section 6.5.  No Implied Rights or Remedies.  Except as
        otherwise expressly provided herein, nothing herein expressed or
        implied is intended or shall be construed to confer upon or to
        give any person, firm or corporation, other than the parties
        hereto, any rights or remedies under or by reason of this
        Agreement.  The parties hereto acknowledge that, except as
        expressly provided in this Agreement, no party hereto has made or
        is making any representations or warranties whatsoever, implied
        or otherwise.

             Section 6.6.  Public Announcements.  The content of any
        public announcement by Buyer or Seller will be subject to the


                                       42
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<PAGE>





        review and approval of Seller or Buyer, as the case may be, such
        review to be timely and approval not to be unreasonably withheld.

             Section 6.7.  Headings.  The headings in this Agreement are
        inserted for convenience of reference only and shall not be a
        part of or control or affect the meaning hereof.

             Section 6.8.  Severability.  If any provision of this
        Agreement shall be declared void or unenforceable by any judicial
        or administrative authority, the validity of any other provision
        shall not be affected thereby.

             Section 6.9.  Counterparts.  This Agreement may be executed
        in one or more counterparts, each of which shall be deemed an
        original, but all of which together shall constitute one and the
        same instrument.

             Section 6.10.  Exhibits.  The Exhibits attached hereto and
        referred to in this Agreement are a part of this Agreement for
        all purposes.

             Section 6.11.  Agreement Binding.  This Agreement and the
        rights and duties hereunder shall be binding upon and inure to
        the benefit of the successors, assigns, heirs and legal and
        personal representatives of the parties hereto.

             Section 6.12. Gender.  In this Agreement, unless the context
        requires otherwise the singular includes the plural, the plural
        the singular, the masculine gender includes the neuter, masculine
        and feminine genders and vice versa.

             Section 6.13.  Governing Law.  This Agreement shall be
        governed exclusively by the laws of the State of New Jersey and
        the Federal laws of the United States of America.

             Section 6.14.  Consent to Jurisdiction.  Each party to this
        Agreement hereby irrevocably and unconditionally consents to
        submit to the exclusive jurisdiction of the courts of the State
        of New Jersey and of the United States of America located in or
        having jurisdiction over Millburn, New Jersey, for any actions,
        suits or proceedings arising out of or relating to this Agreement
        and the transactions contemplated hereby (and each party agrees
        not to commence any action, suit or proceeding relating thereto
        except in such courts), and further agrees that service of any
        process, summons, notice or document in accordance with the
        provisions of Section 6.1 shall be effective service of process
        for any action, suit or proceeding brought against such party in
        any such court.  Each party hereby irrevocably and
        unconditionally waives any objection to the laying of venue of
        any action, suit or proceeding arising out of this Agreement or
        the transactions contemplated hereby, in the courts of the State
        of New Jersey or of the United States of America located in or
        having jurisdiction over Millburn, New Jersey, and hereby further
        irrevocably and unconditionally waives and agrees not to plead or

                                       43
PAGE
<PAGE>





        claim in any such court that any such action, suit or proceeding
        brought in any such court has been brought in an inconvenient
        forum.

             IN WITNESS WHEREOF, the parties have caused this Agreement
        to be duly executed as of the date first written above.

        THERMO PROCESS SYSTEMS INC.        NORD EST S.A.


        By: /s/ John P. Appleton           By: /s/ Michel Jacquet

        Printed Name: John Pl Appleton     Printed Name: Michel Jacquet 

        Title: President                   Title: _____________________

                                           FOR PURPOSES OF SECTION 
        /s/ Emil C. Herkert                4.4(c) ONLY:
        Emil C. Herkert
                                           ENGINEERING TECHNOLOGY AND
                                           KNOWLEDGE CORPORATION
        /s/ Kenneth L. Zippler
        Kenneth L. Zippler                 By: /s/ Michel Jacquet 

                                           Printed Name: Michel Jacquet
        /s/ Franklin O. Williamson, Jr.
        Franklin O. Williamson, Jr.        Title:______________________


        /s/ Fletcher N. Platt, Jr.
        Fletcher N. Platt, Jr.


        /s/ Eugene J. Destefano
        Eugene J. Destefano


        /s/ Meint Olthof 
        Meint Olthof


        /s/ Stanley P. Kaltnecker, Jr.
        Stanley P. Kaltnecker, Jr.






















                           THERMO PROCESS SYSTEMS INC.

                             Secured Promissory Note
                             Waltham, Massachusetts
                                                                         
                                    
        $28,000,000                                As of January 29, 1995


             For value received, THERMO PROCESS SYSTEMS INC., a Delaware
        corporation (the "Company"), hereby promises to pay to the order
        of Nord Est S.A., or assigns (hereinafter referred to as the
        "Payee"), the principal sum of twenty-eight million dollars
        ($28,000,000) or such part thereof as then remains unpaid,
        without interest, except as set forth below, and net of any
        withholding obligation that may apply under applicable law.  The
        principal amount hereof shall be payable $13,935,000 on February
        15, 1998 and $14,065,000 on May 15, 1998.  Principal and
        interest, if any, shall be payable in lawful money of the United
        States of America, in immediately available funds, at the
        principal office of the Payee or at such other place as the Payee
        may designate from time to time in writing to the Company.  This
        Note may be prepaid at any time or from time to time, in whole or
        in part, without any premium or penalty.  

             This Note is the Note referred to in that certain Stock
        Purchase and Sale Agreement effective as of the date hereof among
        Payee, the Company and certain members of the management of Elson
        T. Killam Associates Inc., a New Jersey corporation (the
        "Agreement"), and is secured by the deposit of U.S. Treasury
        securities as provided for in that certain Pledge Agreement
        effective as of the date hereof between the Company and the
        Payee.

             The then unpaid principal amount of this Note shall be and
        become immediately due and payable without notice or demand, at
        the option of the Payee, upon the occurrence of any of the
        following events (an "Event of Default"):

                  (a)  the failure of the Company to pay when due the
             principal amount hereof;

                  (b)  any representation or warranty made to the Payee
             by the Company in the Agreement shall prove to have been
             false or misleading in any material respect as of the date
             hereof;

                  (c)  the failure of the Company to pay its debts as
             they become due, the insolvency of the Company, the filing
             against the Company of any petition under the U.S.
             Bankruptcy Code (or the filing of any similar petition under
             the insolvency law of any jurisdiction) which filing is not
PAGE
<PAGE>





             dismissed within 60 days thereafter, the filing by the
             Company of any petition under the U.S. Bankruptcy Code (or
             the filing by the Company of any similar petition under the
             insolvency law of any jurisdiction), or the making by the
             Company of an assignment or trust mortgage for the benefit
             of creditors or the appointment of a receiver, custodian or
             similar agent with respect to, or the taking by any such
             person of possession of, any property of the Company;

                  (d)  the sale by the Company of all or substantially
             all of its assets (other than to Thermo Electron Corporation
             ("Thermo Electron") or to a subsidiary of Thermo Electron in
             a transaction in which Thermo Electron guarantees the
             payment of this Note);

                  (e)  the merger or consolidation of the Company with or
             into any other corporation (other than Thermo Electron or a
             subsidiary of Thermo Electron) in a transaction in which the
             Company is not the surviving entity;

                  (f)  the issuance of any writ of attachment, by trustee
             process or otherwise, or any restraining order or injunction
             not removed, repealed or dismissed within 60 days of
             issuance, against or affecting the person or property of the
             Company or any liability or obligation of the Company to the
             holder hereof; and

                  (f)  the suspension of the transaction of the usual
        business of the Company.

             Any amount that remains unpaid when due under this Note
        shall bear interest, from and after such due date through the
        date on which such amount is paid, at a rate per annum equal to
        the rate of interest announced from time to time by The First
        National Bank of Boston at its head office in Boston,
        Massachusetts as its "base rate" plus 3%.  In case any payment
        herein provided for shall not be paid when due, the Company
        further promises to pay all costs of collection, including all
        reasonable attorneys' fees.

             No delay or omission on the part of the Payee in exercising
        any right hereunder shall operate as a waiver of such right or of
        any other right of the Payee, nor shall any delay, omission or
        waiver on any one occasion be deemed a bar to or waiver of the
        same or any other right on any future occasion.  The Company
        hereby waives presentment, demand, notice of prepayment, protest
        and all other demands and notices in connection with the
        delivery, acceptance, performance, default or enforcement of this
        Note.  The Company hereby assents to any indulgence and any
        extension of time for payment of any indebtedness evidenced
        hereby granted or permitted by the Payee.  The Company waives
        trial by jury and the right to interpose any counterclaim or
        setoff of any kind whatsoever.
PAGE
<PAGE>





             The Company hereby irrevocably and unconditionally consents
        to submit to the exclusive jurisdiction of the courts of the
        State of New Jersey and of the United States of America located
        in or having jurisdiction over Millburn, New Jersey, for any
        actions, suits or proceedings arising out of or relating to this
        Note (and agrees not to commence any action, suit or proceeding
        relating thereto except in such courts), and further agrees that
        service of any process, summons, notice or document in accordance
        with the provisions of Section 6.1 of the Agreement shall be
        effective service of process for any action, suit or proceeding
        brought against the Company in any such court.  The Company
        hereby irrevocably and unconditionally waives any objection to
        the laying of venue of any action, suit or proceeding arising out
        of this Note in the courts of the State of New Jersey or of the
        United States of America located in or having jurisdiction over
        Millburn, New Jersey, and hereby further irrevocably and
        unconditionally waives and agrees not to plead or claim in any
        such court that any such action, suit or proceeding brought in
        any such court has been brought in an inconvenient forum.
          
             This Note shall be governed by and construed in accordance
        with, the laws of the Commonwealth of Massachusetts and shall
        have the effect of a sealed instrument.


                                      THERMO PROCESS SYSTEMS INC.

                                      By: /s/ John P. Appleton

                                      Printed Name: John P. Appleton

                                      Title: President

        [Corporate Seal]

        Attest:

        /s/ Sandra L. Lambert
        Sandra L. Lambert












        THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER
        THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT").  THESE
        SECURITIES HAVE BEEN ACQUIRED FOR INVESTMENT, AND NOT WITH A VIEW
        TO DISTRIBUTION OR RESALE, AND MAY NOT BE SOLD, PLEDGED,
        MORTGAGED, HYPOTHECATED OR OTHERWISE TRANSFERRED (1) WITHOUT AN
        EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT COVERING THESE
        SECURITIES OR (2) UNLESS AN EXEMPTION FROM REGISTRATION IS
        AVAILABLE.



                           THERMO PROCESS SYSTEMS INC.
                        Promissory Note Due June 1, 1997
                                Livonia, Michigan
                                                                         
                                                        February 21, 1995


             For value received, THERMO PROCESS SYSTEMS INC., a Delaware
        corporation (the "Company"), hereby promises to pay to Thermo
        Electron Corporation (hereinafter referred to as the "Payee"), or
        registered assigns, on June 1, 1997, as described below, the
        principal sum of thirty-eight million dollars ($38,000,000) or
        such part thereof as then remains unpaid, to pay interest from
        the date hereof on the whole amount of said principal sum
        remaining from time to time unpaid at a rate per annum equal to
        the rate of the Commercial Paper Composite Rate as reported by
        Merrill Lynch Capital Markets, as an average of the last five
        business days of each fiscal quarter, plus twenty-five (25) basis
        points, such interest to be payable in arrears on the first day
        of each fiscal quarter of the Company during the term set forth
        herein, until the whole amount of the principal hereof remaining
        unpaid shall become due and payable, and to pay interest on all
        overdue principal and interest at a rate per annum equal to the
        rate of interest announced from time to time by The First
        National Bank of Boston at its head office in Boston,
        Massachusetts as its "base rate" plus one percent (1%).
        Principal and all accrued but unpaid interest shall be repaid on
        June 1, 1997.  Principal and interest shall be payable in lawful
        money of the United States of America, in immediately available
        funds, at the principal office of the Payee or at such other
        place as the legal holder may designate from time to time in
        writing to the Company.  Interest shall be computed on an
        actual/360-day basis.

             This Note may be prepaid at any time or from time to time,
        in whole or in part, without any premium or penalty.  All
        prepayments shall be applied first to accrued interest and then
        to principal.


                                        1
PAGE
<PAGE>







             The then unpaid principal amount of, and interest
        outstanding on, this Note shall be and become immediately due and
        payable without notice or demand, at the option of the holder
        hereof, upon the occurrence of any of the following events:

                  (a)  the failure of the Company to pay any amount due
             hereunder within ten (10) days of the date when due;

                  (b)  any representation, warranty or statement made or
             furnished to the Payee by the Company in connection with
             this Note or the transaction from which it arises shall
             prove to have been false or misleading in any material
             respect as of the date when made or furnished;

                  (c)  the failure of the Company to pay its debts as
             they become due, the insolvency of the Company, the filing
             by or against the Company of any petition under the U.S.
             Bankruptcy Code (or the filing of any similar petition under
             the insolvency law of any jurisdiction), or the making by
             the Company of an assignment or trust mortgage for the
             benefit of creditors or the appointment of a receiver,
             custodian or similar agent with respect to, or the taking by
             any such person of possession of, any property of the
             Company;

                  (d)  the sale by the Company of all or substantially
             all of its assets;

                  (e)  the merger or consolidation of the Company with or
             into any other corporation in a transaction in which the
             Company is not the surviving entity;

                  (f)  the issuance of any writ of attachment, by trustee
             process or otherwise, or any restraining order or injunction
             not removed, repealed or dismissed within thirty (30) days
             of issuance, against or affecting the person or property of
             the Company or any liability or obligation of the Company to
             the holder hereof; and

                  (g)  the suspension of the transaction of the usual
             business of the Company.

             Upon surrender of this Note for transfer or exchange, a new
        Note or new Notes of the same tenor dated the date to which
        interest has been paid on the surrendered Note and in an
        aggregate principal amount equal to the unpaid principal amount
        of the Note so surrendered will be issued to, and registered in
        the name of, the transferee or transferees.  The Company may
        treat the person in whose name this Note is registered as the
        owner hereof for the purpose of receiving payment and for all
        other purposes.


                                        2
PAGE
<PAGE>





             In case any payment herein provided for shall not be paid
        when due, the Company further promises to pay all cost of
        collection, including all reasonable attorneys' fees.

             No delay or omission on the part of the Payee in exercising
        any right hereunder shall operate as a waiver of such right or of
        any other right of the Payee, nor shall any delay, omission or
        waiver on any one occasion be deemed a bar to or waiver of the
        same or any other right on any future occasion.  The Company  
        hereby waives presentment, demand, notice of prepayment, protest
        and all other demands and notices in connection with the
        delivery, acceptance, performance, default or enforcement of this
        Note.  The undersigned hereby assents to any indulgence and any
        extension of time for payment of any indebtedness evidenced
        hereby granted or permitted by the Payee.  

             This Note shall be governed by and construed in accordance
        with, the laws of the Commonwealth of Massachusetts and shall
        have the effect of a sealed instrument.


                                        THERMO PROCESS SYSTEMS INC.


                                        By:  /s/ John P. Appleton
                                             John P. Appleton
                                             President and Chief         
                                             Executive Officer

        [Corporate Seal]

        Attest:


        /s/ Sandra L. Lambert
        Sandra L. Lambert
        Secretary


        AA950510011


















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