EXHIBIT 2.2

                         AGREEMENT AND PLAN OF MERGER



  This Agreement and Plan of Merger ("Agreement") is entered into on May 14,
1997, by and among PETROTECH ACQUISITION, INC., a Delaware corporation (the
"Buyer"), ROPER INDUSTRIES, INC., a Delaware corporation and parent of Buyer
("Parent"),  PETROTECH, INC., a Louisiana corporation and its wholly-owned
subsidiary, PETROTECH INTERNATIONAL, INC., a Louisiana corporation
(collectively, "Petrotech") and DOUGLAS W. MOORE, TERRY E IRWIN, WILLIAM A.
DYAR, each individual residents of the state of Louisiana and the WILLIAM A.
DYAR AND MARGUERITE S. DYAR CHARITABLE REMAINDER TRUST, a trust established
under the laws of the state of Louisiana and represented herein by its
independent special trustee Timothy Murphy (each of the latter individuals, as
well as said trust, a "Shareholder").  The Buyer, Parent, Petrotech and the
Shareholders are referred to collectively herein as the "Parties."

  This Agreement contemplates a transaction in which Buyer shall merge with
Petrotech, with Buyer being the surviving corporation and in connection
therewith, the Shareholders will receive certain consideration in the form of
cash and shares of capital stock of Parent.

  Now, therefore, in consideration of the premises and the mutual promises
herein made, and in consideration of the representations, warranties, and
covenants herein contained, the Parties agree as follows.


  1.  DEFINITIONS.


        "Accredited Investor" has the meaning set forth in Regulation D
promulgated under the Securities Act.

        "Acquired Company" means Petrotech and Petrotech's interests in
Petrotech Europa BV., a Netherlands corporation ("Petrotech Europa").

        "Adverse Consequences" means all actions, suits, proceedings, hearings,
investigations, charges, complaints, claims, demands, injunctions, judgments,
orders, decrees, rulings, damages, penalties, fines, costs, amounts paid in
settlement, Liabilities, obligations, Taxes, liens, losses, expenses, and fees,
including court costs and reasonable attorneys' fees and expenses; provided,
however, that an Indemnified Party shall be obligated to take steps which are
reasonable under the circumstances to mitigate any Adverse Consequences.

        "Affiliated Group" means any affiliated group within the meaning of Code
Sec. 1504(a) (or any similar group defined under a similar provision of state,
local, or foreign law).

        "Affiliate Leased Real Property" means the leasehold interests in and to
the real property and improvements used by Petrotech, which is located at (i)
108 Jarrell Drive, Belle

 
Chasse, Louisiana, (ii) the annex to the 108 Jarrell Drive property, including,
without limitation, the adjacent warehouse, parking lot and other items located
therein, and (iii) 150 Keating Drive, Belle Chasse, Louisiana and more
particularly described in (S) 3(l)(ii) of the Petrotech Disclosure Schedule.

        "Agreed Value" means that price per share of the Parent Shares which is
the average of the closing sales prices of the common stock of the Parent on
each of the three (3) trading days immediately preceding, on and immediately
following (each a "Trading Day") the Closing Date as reported by the New York
Stock Exchange ("NYSE").

        "Applicable Rate" means the corporate base rate of interest announced
from time to time by NationsBank.

        "Bank Loan" means that certain loan agreement, dated as of July 20,
1990, by and between Petrotech and Whitney National Bank, with a revolving line
of credit in the original amount of $3,050,000, as amended to date with a line
of credit of $7,000,000.

        "Basis" means any past or present fact, situation, circumstance, status,
condition, activity, practice, occurrence, event, incident, action, failure to
act, or transaction that forms or would probably form the basis for any
specified consequence.

        "Business" means the business conducted by the Acquired Company,
including without limitation, gas pipeline systems and services, turbo machinery
controls, production and wellhead safety controls and related engineering,
construction, and training services.

        "Buyer" has the meaning set forth in the preface above.

        "Buyer Disclosure Schedule" has the meaning set forth in (S) 4 below.

        "Cash Consideration" shall have the meaning set forth in (S) 2(c) below.

        "Closing" has the meaning set forth in (S) 2(e) below.

        "Closing Balance Sheet" has the meaning set forth in (S) 2(f)(i) below.

        "Closing Date" has the meaning set forth in (S) 2(g) below.

        "Code" means the Internal Revenue Code of 1986, as amended.

        "Company Loans" means any and all loans of Petrotech for borrowed money
including, without limitation, the Bank Loan, the Shareholder Loan and the
Sellers Loan.

                                      -2-

 
        "Confidential Information" means: (a) confidential data and confidential
information relating to the business of any Party (the "Protected Party") which
is or has been disclosed to another Party (the "Recipient") or of which the
Recipient became aware as a consequence of or through its relationship with the
Protected Party and which has value to the Protected Party and is not generally
known to its competitors and which is designated by the Protected Party as
confidential or otherwise restricted; and (b) information of the Protected
Party, without regard to form, including, but not limited to, Intellectual
Property, technical or nontechnical data, algorithms, formulas, patents,
compilations, programs, devices, methods, techniques, drawings, processes,
financial data, financial plans, product or service plans or lists of customers
or suppliers which is not commonly known or available to the public and which
information (i) derives economic value from not being generally known to, and
not being readily ascertainable by proper means by, other Persons who can obtain
economic value from its disclosure or use, and (ii) is the subject of efforts
that are reasonable under the circumstances to maintain its secrecy.
Notwithstanding anything to the contrary contained herein, Confidential
Information shall not include any data or information that (a) has been
voluntarily disclosed to the public by the Protected Party, (b) has been
independently developed and disclosed to the public by others, (c) otherwise
enters the public domain through lawful means, (d) was already known by
Recipient prior to such disclosure or was lawfully and rightfully disclosed to
Recipient by another Person, or (e) that is required to be disclosed by law or
order.

        "Controlled Group of Corporations" has the meaning set forth in Code
Sec. 1563.

        "Delaware Act" shall mean the General Corporation Law of the State of
Delaware, as amended.

        "Employee Benefit Plan" means any (a) nonqualified deferred compensation
or retirement plan or arrangement which is an Employee Pension Benefit Plan (as
defined in ERISA Sec. 3(2)), (b) qualified defined contribution retirement plan
or arrangement which is an Employee Pension Benefit Plan, (c) qualified defined
benefit retirement plan or arrangement which is an Employee Pension Benefit Plan
(including any Multiemployer Plan), or (d) Employee Welfare Benefit Plan (as
defined in ERISA Sec. 3(1)) or material fringe benefit plan or program.

        "Environmental, Health, and Safety Laws" means the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, the Resource
Conservation and Recovery Act of 1976, and the Occupational Safety and Health
Act of 1970, each as amended, together with all other laws (including rules,
regulations, state law rulings, codes, plans, permits, injunctions, judgments,
orders, decrees, rulings, and charges thereunder) of federal, state, local and
foreign governments (and all agencies thereof) concerning pollution or
protection of the environment, natural resources, public health and safety, or
employee health and safety, including, but not limited to, laws relating to
emissions, discharges, releases, or threatened releases of Hazardous Substances
in ambient air, surface water, drinking water, wetlands, ground water, or lands
or otherwise relating to the manufacture, processing, distribution, use,
treatment, storage, disposal, recycling, transport, or handling of pollutants,
contaminants, or chemical, industrial, hazardous, or toxic materials or wastes.

                                      -3-

        "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

        "Escrow Agreement" means the Escrow Agreement dated the Closing Date,
entered into among the Parties with respect to the indemnification obligations
of the Shareholders under (S) 7 of this Agreement, the form of which is set
forth as Exhibit J.

        "Escrow Funds" shall have the meaning set forth in (S) 7(b)(v).

        "Extremely Hazardous Substance" has the meaning set forth in Sec. 302 of
the Emergency Planning and Community Right-to-Know Act of 1986, as amended.

        "Fiduciary" has the meaning set forth in ERISA Sec. 3(21).

        "Financial Statements" shall have the meaning set forth in (S) 3(g).

        "GAAP" means United States generally accepted accounting principles as
in effect as of the date hereof.

        "Hart-Scott-Rodino Act" means the Hart-Scott-Rodino Antitrust
Improvements Act of 1976, as amended.

        "Hazardous Substance" means any substance regulated under or defined by
Environmental, Health, and Safety Laws, including, but not limited to, any
pollutant, contaminant, hazardous substance, hazardous constituent, hazardous
waste, special waste, solid waste, industrial waste, petroleum derived substance
or waste, or toxic substance.

        "Indemnified Party" has the meaning set forth in (S) 7(d) below.

        "Indemnifying Party" has the meaning set forth in (S) 7(d) below.

        "Intellectual Property" means with respect to the Business:

        (a) all inventions (whether patentable or unpatentable and whether or
     not reduced to practice), all improvements thereto, and all patents, patent
     applications, and patent disclosures, together with all reissuances,
     continuations, continuations-in-part, revisions, extensions, and
     reexaminations thereof;

        (b) all trademarks, service marks, trade dress, logos, trade names and
     corporate names, together with all translations, adaptations, derivations,
     and combinations thereof and including all goodwill associated therewith,
     and all applications, registrations, and renewals in connection therewith;

                                      -4-

 
        (c) all copyrightable works, all copyrights, and all applications,
     registrations, and renewals in connection therewith;

        (d) all mask works and all applications, registrations, and renewals in
     connection therewith;

        (e) all trade secrets and confidential business information (including
     ideas, research and development, know-how, formulas, compositions,
     manufacturing and production processes and techniques, technical data,
     designs, drawings, specifications, customer and supplier lists, pricing and
     cost information, and business and marketing plans and proposals);

        (f) all computer software (including data and related documentation);

        (g) all other proprietary rights; and

        (h) all copies and tangible embodiments thereof (in whatever form or
     medium).

        "Knowledge" means knowledge of the Shareholders, after due inquiry of
Petrotech employees with management responsibility in the area of Petrotech
operations with respect to which the applicable representation or warranty
applies.

        "Leased Real Property" means the Affiliate Leased Real Property and the
leasehold interests in and to the real property and improvements used by
Petrotech, which is located at (i) 7121 North Loop East, Houston, Texas, (ii)
3520 General DeGaulle Drive, Timbers Office Park, New Orleans, Louisiana and
(iii) Northway 10, Executive Park, Ballston Lake, New York, and more
particularly described in (S) 3(l)(ii) of the Petrotech Disclosure Schedule.

        "Louisiana Corporation Act" shall mean the Louisiana Business
Corporation Law, LA.R.S. 12:1, et seq., as amended.

        "Liability" means any liability (whether known or unknown, whether
asserted or unasserted, whether absolute or contingent, whether accrued or
unaccrued, whether liquidated or unliquidated, and whether due or to become
due), including any liability for Taxes.

        "Merger" shall have the meaning set forth in (S) 2 below.

        "Merger Consideration" shall have the meaning set forth in Section 2
hereof.

        "Multiemployer Plan" has the meaning set forth in ERISA Sec. 3(37).

                                      -5-

 
        "Ordinary Course of Business" means the ordinary course of business
consistent with past custom and practice (including with respect to quantity and
frequency).

        "Parent Financial Statements" shall have the meaning set forth in (S)
4(f).

        "Parent Shares" means the shares of common stock, par value $.01, of
Parent which shares shall be delivered to Petrotech as provided in (S) 2(c)
below without registration under, and subject to the restrictions imposed by,
the Securities Act.

        "Party" has the meaning set forth in the preface above.

        "PBGC" means the Pension Benefit Guaranty Corporation.

        "Person" means an individual, a partnership, a corporation, an
association, a joint stock company, a trust, a joint venture, an unincorporated
organization, or a governmental entity (or any department, agency, or political
subdivision thereof).

        "Petrotech" has the meaning set forth in the preface above.

        "Petrotech Disclosure Schedule" has the meaning set forth in (S) 3
below.

        "Petrotech Plans" has the meaning set forth in (S) 3 below.

        "Petrotech Shares" means share(s) of the Common Stock, no par value, of
Petrotech.

        "Process Agent" has the meaning set forth in (S) 8 below.

        "Product Warranty Claims" means claims of Petrotech customers and/or
users made at any time following Closing in the Ordinary Course of Business with
respect to products sold, manufactured, leased or delivered by Petrotech on or
prior to the Closing Date which are based on the written terms and conditions
set forth in the documentation regarding each project in which Petrotech is
engaged.

        "Prohibited Transaction" has the meaning set forth in ERISA Sec. 406 and
Code Sec. 4975.

        "Public Information" means all Forms 10-K, 10-Q, 8-K, and proxy
statement of Buyer since December 31, 1996.

        "Reportable Event" has the meaning set forth in ERISA Sec. 4043.

        "Securities Act" means the Securities Act of 1933, as amended.

                                      -6-

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

        "Security Interest" means any mortgage, pledge, lien, encumbrance,
charge, or other security interest, other than (a) mechanic's, materialmen's,
and similar liens, (b) liens for Taxes not yet due and payable or for Taxes that
the taxpayer is contesting in good faith through appropriate proceedings, (c)
purchase money liens and liens securing rental payments under capital lease
arrangements, and (d) other liens arising in the Ordinary Course of Business and
not incurred in connection with the borrowing of money.

        "Sellers Loan" means those certain four (4) promissory notes executed by
Petrotech in favor of Celia Sellers, in the aggregate principal amounts of
$200,000; the current principal balance of which is $120,000. The four (4)
promissory notes executed by Petrotech in favor of Celia Sellers are as follows:
(i) promissory note in the amount of $100,000 executed on December 25, 1995;
(ii) promissory note in the amount of $25,000 executed on February 26, 1996;
(iii) promissory note in the amount of $50,000 executed on March 6, 1996; and
(iv) promissory note in the amount of $25,000 executed on October 21, 1996.

        "Shareholder(s)" means Douglas W. Moore, Terry E Irwin, William A. Dyar,
and Timothy Murphy, as independent special trustee of the William A. Dyar and
Marguerite S. Dyar Charitable Remainder Trust, who are the only shareholders of
Petrotech.

        "Shareholder Family Trusts" means the Moore Children Trust (Jennifer Lee
Moore, beneficiary of one trust and Benjamin Alexander Moore, beneficiary of the
second trust) established by act dated December 21, 1993; the Dyar Children
Trust (Marie Suzanne Dyar Waldrop, beneficiary of one trust and Debra Lynn Dyar
Loga, beneficiary of the second trust) established by act dated December 21,
1993; and the Irwin Children Trust (Terry E Irwin, II, beneficiary of one trust
and Tonya Dawn Irwin Rourke, beneficiary of the second trust) established by act
dated December 21, 1993.

        "Shareholder Loan" means that certain loan, made as of June 7, 1994 in
the principal sum of Five Million and no/100 Dollars ($5,000,000.00) or the
aggregate unpaid principal amount owed thereon, whichever is less, as evidenced
by the internal records of the lenders with interest thereon at the rate of
Whitney National Bank Prime plus 1% per annum from date until paid in full, by
Douglas W. Moore, Terry E Irwin and William A. Dyar to Petrotech.

        "Subsidiary" means any corporation with respect to which a specified
Person (or a Subsidiary thereof) owns a majority of the common stock or has the
power to vote or direct the voting of sufficient securities to elect a majority
of the directors.

        "Tax" means any federal, state, local, or foreign income, gross
receipts, license payroll, employment, excise, severance, stamp, occupation,
premium, windfall profits, environmental (including taxes under Code Sec. 59A),
customs duties, capital stock, franchise profits, withholding, social security

                                      -7-

 
(or similar), unemployment, disability, real property, personal property, sales,
use, transfer, registration, value added, alternative or add-on minimum,
estimated, or other tax of any kind whatsoever, including any interest, penalty,
or addition thereto, whether disputed or not.

        "Tax Return" means any return, declaration, report, claim for refund, or
information return or statement relating to Taxes, including any schedule or
attachment thereto, and including any amendment thereof.

  2.  MERGER.

        (a) At the Effective Time (as hereinafter defined) and subject to the
     terms and conditions of this Agreement, Buyer shall be merged with
     Petrotech, in accordance with the relevant provisions of the Louisiana
     Corporation Act and the Delaware Act, the separate corporate existence of
     Petrotech shall cease and the Buyer shall continue as the surviving
     corporation (the "Merger"). The Buyer is the surviving corporation after
     the Merger and is hereinafter sometimes referred to as the "Surviving
     Corporation." The Merger shall otherwise have the effect set forth in the
     Delaware Act.

        (b) At the Closing, the parties hereto shall cause the Merger to be
     consummated by delivering articles of merger to the Secretary of State of
     Louisiana and the Secretary of State of Delaware executed in accordance
     with relevant provisions of the Louisiana Corporation Act and the Delaware
     Act for filing thereby (the time of such filing being the "Effective
     Time"). The Articles of Incorporation and Bylaws, respectively, of the
     Buyer as in effect immediately prior to the Effective Time, shall be the
     Articles of Incorporation and Bylaws of the Surviving Corporation. The
     officers and directors of Buyer immediately prior to the Effective Time
     shall be the officers and directors of the Surviving Corporation, in each
     case, until their respective successors are duly elected and qualified. The
     corporate name of the Surviving Corporation shall be Petrotech, Inc.

        (c) At the Effective Time, by virtue of the Merger and without any
     action on the part of the holders thereof:

                (i) all of the Petrotech Shares shall be converted into, and
          represent the right to receive in the manner provided in Sections 2(d)
          and 2(e) below, the sum of (A) that number of shares of Parent Common
          Stock equal to Six Million Five Hundred Thousand Dollars
          ($6,500,000.00) divided by the Agreed Value (the "Stock
          Consideration") plus (B) cash in the amount of Six Million Five
          Hundred Thousand Dollars ($6,500,000.00) (the "Cash Consideration" and
          the Stock Consideration collectively, the "Merger Consideration");

                                      -8-

 
                (ii) each share of capital stock of Petrotech that is held in
          the treasury of Petrotech, if any, shall be cancelled and retired and
          cease to exist and no consideration shall be issued in exchange
          therefor; and

                (iii) each issued and outstanding share of capital stock of
          Buyer shall be converted into and become one fully paid and non-
          assessable share of common stock of the Surviving Corporation.

          (d) At the Closing Date, the Cash Consideration shall be paid as
     follows:

                (i) $1,324,000 shall be paid to the escrow agent pursuant to the
          Escrow Agreement to be held and disbursed as provided in Section 7 of
          the Agreement and the Escrow Agreement; and

                (ii) the balance of the Cash Consideration shall be paid as
          follows: 37.5% thereof to Douglas W. Moore, 37.5% thereof to the
          William A. Dyar and Marguerite S. Dyar Charitable Remainder Trust and
          the remaining 25% thereof to Terry E Irwin.

          (e) Five (5) days following the Closing Date, Parent shall transmit to
     Douglas W. Moore, William A. Dyar and Terry E Irwin certificates
     representing the aggregate Merger Consideration issuable pursuant to
     Section 2(c) above. Douglas W. Moore and William A. Dyar each shall be
     entitled to receive 37.5% of the total Stock Consideration and Terry E
     Irwin shall be entitled to receive the remaining 25% of the total Stock
     Consideration. At the Closing, each Shareholder shall execute and deliver a
     letter of transmittal, in a form reasonably satisfactory to Parent and
     deliver such letter of transmittal to Parent, together with a
     certificate(s) that immediately prior to the Effective Time represented the
     Petrotech Shares held by such Shareholder (the "Certificates"). Upon
     surrender of Certificates to Parent, together with such letter of
     transmittal, the holder of such Certificates shall be entitled to receive
     in exchange therefore the Merger Consideration as set forth above and the
     Certificates so surrendered shall be forthwith cancelled. No fraction of
     the Parent Shares shall be issued and each Shareholder who would otherwise
     be entitled to receive a fractional share of Parent Shares (after taking
     into account all shares then held by such Shareholder) shall receive, in
     lieu thereof and as a part of the Merger Consideration, one fully-paid and
     non-assessable share of Parent Shares.

          (f) The Closing. The closing of the transactions contemplated by this
     Agreement (the "Closing") shall take place at the offices of Powell,
     Goldstein, Frazer & Murphy LLP, on May 16, 1997 or such other date as the
     Parties may agree (the "Closing Date").

                                      -9-

 
        (g) Deliveries at the Closing. (i) At the Closing, Petrotech will
     deliver to the Buyer the various certificates, instruments, and documents
     referred to in (S) 5(a) below; (ii) the Buyer will deliver to Petrotech the
     various certificates, instruments, and documents referred to in (S) 5(b)
     below; (iii) Petrotech and the appropriate Shareholders and the trustees of
     the Shareholder Family Trusts will execute, acknowledge (if appropriate),
     and deliver to the Buyer (A) the original lease agreements with respect to
     the Leased Real Property in the forms attached hereto as Exhibits A-1
     through A-3 together with fully executed original amendments thereto in the
     form attached to said Exhibits and (B) such other documents as the Buyer
     and its counsel may reasonably request; (iv) the Buyer will execute,
     acknowledge (if appropriate), and deliver to Petrotech (A) such documents
     as Petrotech and the Shareholders and their counsel reasonably may request;
     and (v) the Buyer will deliver to Petrotech the Cash Consideration.


  3.  REPRESENTATIONS AND WARRANTIES OF THE SHAREHOLDERS.  The Shareholders
jointly and severally represent and warrant to the Buyer and Parent that the
statements contained in this (S) 3 are correct and complete as of the date
hereof and will be as of the Closing Date, except as specified to the contrary
in the disclosure schedule prepared by Petrotech accompanying this Agreement and
initialed by Petrotech and the Buyer and as amended or supplemented as of the
Closing Date (the "Petrotech Disclosure Schedule").  The Petrotech Disclosure
Schedule will be arranged in paragraphs corresponding to the lettered and
numbered paragraphs contained in this (S) 3.


        (a) Organization of the Acquired Company; Investment Interest.

                (i) Petrotech, Inc. is a corporation duly organized, validly
          existing, and in good standing under the laws of the jurisdiction of
          its incorporation; and is duly qualified to conduct business and in
          good standing in each of the jurisdictions set forth in Schedule
          3(a)(i) hereto, which constitute the jurisdictions in which the
          character of Petrotech, Inc.'s properties or the nature of its
          Business requires such qualification, except for those jurisdictions
          where the failure to be so qualified would not have a material adverse
          effect on the Business of Petrotech, Inc.


                (ii) Petrotech International, Inc. is a corporation duly
          organized, validly existing and in good standing under the laws of the
          jurisdiction of its incorporation; and is duly qualified to conduct
          business and in good standing in each of the jurisdictions set forth
          in Schedule 3(a)(ii) hereto, which constitute the jurisdictions in
          which the character of Petrotech International Inc.'s properties or
          the nature of its Business requires such qualification, except for
          those jurisdictions where the failure to be so qualified would not
          have a material adverse effect on the Business of Petrotech
          International, Inc.

                                     -10-

 
                (iii) Petrotech Europa is a corporation duly organized, validly
          existing and in good standing under the laws of the jurisdiction of
          its incorporation; and is duly qualified to conduct business and in
          good standing in each of the jurisdictions set forth in Schedule
          3(a)(iii) hereto, which constitute the jurisdictions in which the
          character of Petrotech Europa's properties or the nature of its
          Business requires such qualification, except for those jurisdictions
          where the failure to be so qualified would not have a material adverse
          effect on the Business of Petrotech Europa.

                (iv) The Petrotech Shares are held of record and beneficially by
          the Shareholders as described in (S) 3(a)of the Petrotech Disclosure
          Schedule. All issued and outstanding shares of capital stock of
          Petrotech International, Inc. are held of record and beneficially by
          Petrotech, Inc. and fifty-one percent (51%) of the issued and
          outstanding shares of capital stock of Petrotech Europa are held of
          record and beneficially by Petrotech, Inc. as described in (S) 3(a) of
          the Petrotech Disclosure Schedule.

                (v) Douglas W. Moore, Terry E Irwin and William A. Dyar, are
          each Accredited Investors. Each said Shareholder understands that the
          Parent Shares being acquired by him have not been, and are not
          proposed to be, registered under the Securities Act or any state
          securities laws, and are being offered and sold in reliance upon
          United States federal and state exemptions for transactions not
          involving any public offering. Each said Shareholder acknowledges that
          he is acquiring the Parent Shares for investment purposes and not with
          a view to, or intention to effect, the distribution thereof in
          violation of the Securities Act or any applicable state securities
          laws, and that such Parent Shares may not be disposed of in
          contravention of the Securities Act or any applicable state securities
          laws. Each said Shareholder represents that he is a sophisticated
          investor with knowledge and experience in business and financial
          matters, is able to evaluate the risks and benefits of the investment
          in Parent Shares, has received the Public Information concerning the
          Parent and has had the opportunity to obtain additional information as
          desired in order to evaluate the merits of and the risks inherent in
          acquiring such Parent Shares.

        (b) Authorization of Transaction. Petrotech and each Shareholder has
     full power and authority (including full corporate power and authority) to
     execute and deliver this Agreement and to perform its, his or their
     obligations hereunder. Without limiting the generality of the foregoing,
     the board of directors of Petrotech and the Shareholders of Petrotech have
     duly authorized the execution, delivery, and performance of this Agreement
     by Petrotech. This Agreement constitutes the valid and legally binding
     obligation of Petrotech, enforceable in accordance with its terms and
     conditions. Petrotech and the Shareholders do not need to give any notice

                                     -11-

 
     to, make any filing with, or obtain any authorization, consent, or approval
     of any governmental agency in order for the Parties to consummate the
     transactions contemplated by this Agreement other than the notification and
     approval under the Hart-Scott-Rodino Act.


        (c)  Noncontravention.  Neither the execution and the delivery of this
     Agreement, nor the consummation of the transactions contemplated hereby,
     will (i) violate any constitution, statute, regulation, rule, injunction,
     judgment, order, decree, ruling, charge, or other restriction of any
     government, governmental agency, or court to which the Acquired Company or
     any Shareholder is subject or any provision of the charter or bylaws of the
     Acquired Company, or (ii) conflict with, result in a breach of, constitute
     a default under, result in the acceleration of, create in any party the
     right to accelerate, terminate, modify, or cancel, or require any notice
     under any agreement, contract, lease, license, instrument, or other
     arrangement to which the Acquired Company or any Shareholder is a party or
     by which it is bound or to which any of its assets is subject (or result in
     the imposition of any Security Interest upon any of its assets).


        (d) Brokers' Fees. Neither the Acquired Company nor any Shareholder has
     any Liability or obligation to pay any fees or commissions to any broker,
     finder, or agent with respect to the transactions contemplated by this
     Agreement.


        (e) Title to Assets. The assets of the Acquired Company and the Leased
     Real Property constitute all of the property and assets necessary to
     conduct the Business as presently conducted. Each Shareholder has the right
     to convey, and upon the transfer of the Petrotech Shares to the Buyer, each
     Shareholder will have conveyed good title and interest in and to the
     Petrotech Shares free and clear of all Security Interests. Petrotech has
     good title to all of the assets of the Acquired Company free and clear of
     any Security Interest, except the Company Loans and except as listed on
     Schedule 3(p)(iv), or restriction on transfer.


        (f) Petrotech Shares. The Petrotech Shares constitute all of the issued
     and outstanding capital stock of Petrotech and are validly issued, fully
     paid and non-assessable and owned, beneficially and of record, by the
     Shareholders and no Petrotech Shares are subject to, nor have any been
     issued in violation of, preemptive or similar rights. All issuances, sales
     and repurchases of equity interests by the Acquired Company have been
     effected in compliance with all applicable laws, including, without
     limitation, applicable federal and state securities laws. The Shareholders
     have good title to the Petrotech Shares, free and clear of any Security
     Interest or restriction on transfer, except for the restrictions on
     transfer set forth in Article VI of the articles of incorporation of
     Petrotech, which the Shareholders individually and on behalf of Petrotech
     hereby waive. The stock ledger and other corporate records of the Acquired
     Company contain a complete and correct record of all issuance and transfer
     of equity interests of the Acquired Company. There are no preemptive or
     similar rights on the part of any holder of any Petrotech Shares. No

                                     -12-

 
     options, warrants, conversion or other rights, agreements, commitments,
     arrangements or understandings of any kind obligating Petrotech,
     contingently or otherwise, to issue or sell any shares of its common stock
     or any securities convertible into or exchangeable for any such shares or
     any other securities, are outstanding, and no authorization therefor has
     been given.


        (g) Financial Statements. Attached hereto as Exhibit B is an unaudited
     balance sheet and income statement of the Acquired Company as of March 31,
     1997 (the "Financial Statements"). The Financial Statements present fairly
     the assets and liabilities of Petrotech as of such date, are prepared in
     accordance with the historical accounting practices of Petrotech, are
     correct and complete, and are consistent with the books and records of
     Petrotech subject to normal year-end audit adjustments.


                As of the Closing Date, the total amount owed by Petrotech under
     the Sellers Loan shall not exceed the principal sum of $120,000; under the
     Shareholder Loan shall not exceed the principal sum of $1,906,326; and
     under the Bank Loan shall not exceed the principal sum of $7,000,000.


        (h) Events Subsequent to March 31, 1997. Since March 31, 1997, there has
     not been any material adverse change in the business, financial condition,
     operations, or results of operations of the Acquired Company. Without
     limiting the generality of the foregoing, since that date, the Acquired
     Company:

                (i) has not sold, leased, transferred, or assigned any of its
          assets, tangible or intangible outside the Ordinary Course of
          Business;

                (ii) has not entered into any agreement, contract, lease, or
          license (or series of related agreements, contracts, leases, and
          licenses) either involving more than $150,000 (exclusive of customer
          orders) or outside the Ordinary Course of Business, except as listed
          on Schedule 3(h)(ii);

                (iii) has not and to the Knowledge of the Acquired Company or
          any Shareholder no party has, accelerated, terminated, modified, or
          canceled any agreement, contract, lease, or license (or series of
          related agreements, contracts, leases, and licenses) involving more
          than $150,000 to which the Acquired Company is a party or by which it
          is bound, except as listed on Schedule 3(h)(iii);

                (iv) has not imposed or permitted any Security Interest upon any
          of its assets, tangible or intangible, except the continuing Security
          Interest granted on July 20, 1990 in favor of Whitney National Bank to
          secure the Bank Loan, and the continuing Security Interest granted on
          July 7, 1994 in favor of Douglas W. Moore, William A. Dyar and Terry E
          Irwin to secure the Shareholder Loan;

                                     -13-

 
                (v) has not made any capital expenditure (or series of related
          capital expenditures) either involving more than $150,000 or outside
          the Ordinary Course of Business, except as listed on Schedule 3(h)(v);

                (vi) has not made any capital investment in, any loan to, or any
          acquisition of the securities or assets of, any other Person, except
          as listed on Schedule 3(h)(vi);

                (vii) has not issued any note, bond, or other debt security or
          created, incurred, assumed, or guaranteed any indebtedness for
          borrowed money or capitalized lease obligation other than performance
          bonds issued in the Ordinary Course of Business, and except as listed
          on Schedule 3(h)(vii);

                (viii) has not delayed or postponed the payment of accounts
          payable or other Liabilities outside of the Ordinary Course of
          Business, except as listed on Schedule 3(h)(viii);

                (ix) has not canceled, compromised, waived, or released any
          right or claim (or series of related rights and claims) outside the
          Ordinary Course of Business, except as listed on Schedule 3(h)(ix);

                (x) has not granted any license or sublicense of any rights
          under or with respect to any Intellectual Property, except as listed
          on Schedule 3(h)(x);

                (xi) has not changed or authorized any change in its charter or
          bylaws;

                (xii) has not experienced any material damage, destruction, or
          loss (whether or not covered by insurance) to its property, except as
          listed on Schedule 3(h)(xii);

                (xiii) has not made any loan to, or entered into any other
          transaction with, any of its directors, officers, and employees, other
          than normal advances to employees (excluding the Shareholders) in the
          Ordinary Course of Business, and except as listed on Schedule
          3(h)(xiii);

                (xiv) has not entered into any employment contract or collective
          bargaining agreement, written or oral, or modified the terms of any
          existing such contract or agreement, except as listed on Schedule
          3(h)(xiv);

                (xv) has not granted any increase in the base compensation of
          any of its directors, officers, and employees, except as listed on
          Schedule 3(h)(xv);

                                     -14-

 
                (xvi) has not adopted, amended, modified or terminated any
          bonus, profit-sharing incentive, severance, or other plan, contract,
          or commitment for the benefit of any of its directors, officers, and
          employees (or taken any such action with respect to any other Employee
          Benefit Plan), except as listed on Schedule 3(h)(xvi);

                (xvii) has not made any other change in employment terms for any
          of its directors, officers, and employees, except as listed on
          Schedule 3(h)(xvii);

                (xviii) has not made or pledged to make any charitable or other
          capital contribution;

                (xix) has not suffered or experienced any other occurrence,
          event, incident, action, failure to act, or transaction outside the
          Ordinary Course of Business;

                (xx) has not declared or paid any dividend or other equity
          distribution, whether in cash or other property; and

                (xxi) has not committed to any of the foregoing.

        (i) Undisclosed Liabilities. The Acquired Company has no Liability (and
     there is no Basis for any present or future action, suit, proceeding,
     hearing, investigation, charge, complaint, claim or demand against the
     Acquired Companies giving rise to any Liability), except for (i)
     Liabilities set forth on the face of the Financial Statements, (ii)
     Liabilities which have arisen after the date of the Financial Statements in
     the Ordinary Course of Business (none of which results from, arises out of,
     or was caused by any breach of contract, breach of warranty claims, product
     liability, tort, infringement, or violation of law), (iii) Liabilities
     which will arise from and after the Closing Date under contracts,
     instruments and similar obligations of the Acquired Company to be performed
     following the Closing Date and (iv) Liabilities set forth on Schedule 3(i).

        (j) Legal Compliance. The Acquired Company has complied with all
     applicable laws (including rules, regulations, codes, injunctions,
     judgments, orders, decrees, rulings, and charges thereunder) of federal,
     state, local, and foreign governments (and all agencies thereof), the
     failure to comply with which will result in Adverse Consequences the costs
     of which will exceed $25,000, and no action, suit, proceeding, hearing,
     investigation, charge, complaint, claim, demand, or notice has been filed
     or commenced against the Acquired Company alleging any failure so to
     comply.

                                     -15-

 
        (k) Tax Matters.

                Except as set forth on Schedule 3(k):

                (i) The Acquired Company has filed all Tax Returns that they
          were required to file and were due. All such Tax Returns were correct
          and complete in all material respects. All Taxes owed by the Acquired
          Company (whether or not shown on any Tax Return) have been paid. The
          Acquired Company currently is not the beneficiary of any extension of
          time within which to file any Tax Return. No claim is presently being
          made by an authority in a jurisdiction where the Acquired Company does
          not file Tax Returns that such Acquired Company is or may be subject
          to taxation by that jurisdiction. There are no Security Interests on
          any of the assets of any of the Acquired Company that arose in
          connection with any failure (or alleged failure) to pay any Tax. The
          Acquired Company has not been a member of an Affiliated Group that has
          filed a "consolidated return" within the meaning of Code Sec. 1501, or
          has filed a combined or consolidated return with another corporation
          with any other taxing authority.

                (ii) The Acquired Company has made all withholdings of Taxes
          required to be made in connection with amounts paid or owing to any
          employee, independent contractor, creditor, shareholder, or other
          third party and such withholdings have either been paid to the
          appropriate governmental agency or set aside in appropriate accounts
          for such purpose.

                (iii) The Acquired Company has not received any notice or other
          indication that any authority is considering assessing any additional
          Taxes for any period for which Tax Returns have been filed. There is
          no dispute or claim concerning any Tax Liability of the Acquired
          Company either (A) claimed or raised by any authority in writing or
          (B) as to which the Acquired Company or any Shareholder has knowledge
          based upon personal contact with any agent or representative of such
          authority. (S) 3(k) of the Petrotech Disclosure Schedule lists all
          federal, state, local, and foreign income Tax returns filed with
          respect to the Acquired Company for taxable periods ended on or after
          July 31, 1993, indicates those Tax Returns that have been audited, and
          indicates those Tax Returns that currently are the subject of audit.
          The Acquired Company has delivered to the Buyer correct and complete
          copies of all federal and foreign income Tax Returns, examination
          reports, and statements of deficiencies assessed against or agreed to
          by the Acquired Company since July 31, 1993.

                (iv) The Acquired Company has not waived any statute of
          limitations in respect of Taxes or agreed to any extension of time
          with respect to a Tax assessment or deficiency.

                                     -16-

 
                (v) The Acquired Company has not made any payments, is not
          obligated to make any payments, or is not a party to any agreement
          that under certain circumstances could obligate it to make any
          payments that will not be deductible under Code Sec. 280G. The
          Acquired Company is not a party to any Tax allocation or sharing
          agreement. The Acquired Company (A) has not been a member of an
          Affiliated Group filing a consolidated federal income Tax Return
          (other than a group the common parent of which was Petrotech) or (B)
          has no Liability for the Taxes of any Person (other than the Acquired
          Company) under Treas. Reg. (S) 1.1502-6 (or any similar provision of
          state, local, or foreign law), as a transferee or successor, by
          contract, or otherwise.

        (l) Real Property.

                (i)  The Acquired Company owns no real property.

                (ii) (S) 3(l)(ii) of the Petrotech Disclosure Schedule lists
          briefly the Leased Real Property. Petrotech has delivered to the Buyer
          correct and complete copies of the leases listed in (S) 3(l)(ii) of
          the Petrotech Disclosure Schedule (as amended to date). With respect
          to each lease listed in (S) 3(l)(ii) of the Petrotech Disclosure
          Schedule:

                (A) the lease or sublease is legal, valid, binding, enforceable,
               and in full force and effect;

                (B) the Acquired Company is not, and to the Knowledge of the
               Acquired Company, no party to the lease or sublease is, in breach
               or default, and no event has occurred which, with notice or lapse
               of time, would constitute a breach or default or permit
               termination, modification, or acceleration thereunder, except as
               set forth on Schedule 3(l)(ii)(B);

                (C) the Acquired Company has not, and to the Knowledge of the
               Acquired Company, no party to the lease or sublease has,
               repudiated any provision thereof;

                (D) to the Knowledge of the Acquired Company, there are no
               disputes, oral agreements, or forbearance programs in effect as
               to the lease;

                (E) the Acquired Company has not assigned, transferred,
               conveyed, mortgaged, deeded in trust, or encumbered any interest
               in the leasehold; or

                                     -17-

 
                (F) to the Knowledge of the Acquired Company, all facilities
               leased thereunder have received all approvals of governmental
               authorities (including licenses and permits) required in
               connection with the operation thereof and have been operated and
               maintained in all material respects in accordance with applicable
               laws, rules, and regulations.

        (m) Intellectual Property.

                (i) The Acquired Company owns or has the right to use pursuant
          to license, sublicense, agreement, or permission of all Intellectual
          Property necessary or desirable for the operation of the Business as
          presently conducted or as proposed to be conducted. Each item of
          Intellectual Property included among the Assets or owned or used by
          the Acquired Company or any Shareholder immediately prior to the
          Closing hereunder will be owned or available for use by the Buyer on
          identical terms and conditions immediately subsequent to the Closing
          hereunder.

                (ii) Except as set forth in Schedule 3(m)(ii), the Acquired
          Company or any Shareholder has not interfered with, infringed upon,
          misappropriated, or otherwise come into conflict with any Intellectual
          Property rights of third parties, and the Acquired Company or any
          Shareholder has not ever received any charge, complaint, claim,
          demand, or notice alleging any such interference, infringement,
          misappropriation, or violation (including any claim that any of the
          Acquired Company or any Shareholder must license or refrain from using
          any Intellectual Property rights of any third party). To the Knowledge
          of the Acquired Company or any Shareholder, no third party has
          interfered with, infringed upon, misappropriated, or otherwise come
          into conflict with any Intellectual Property rights of the Acquired
          Company.

                (iii) (S) 3(m)(iii) of the Petrotech Disclosure Schedule
          identifies each patent or registration which has been issued or
          transferred to the Acquired Company or any Shareholder with respect to
          any of its Intellectual Property, identifies each pending patent
          application for registration which the Acquired Company or any
          Shareholder has made with respect to any of its Intellectual Property,
          and identifies each license, agreement, or other permission which the
          Acquired Company or any Shareholder has granted to any third party
          with respect to any of its Intellectual Property. The Acquired Company
          has delivered to the Buyer correct and complete copies of all such
          patents, registrations, applications, licenses, agreements, and
          permissions (as amended to date) and has made available to the Buyer
          correct and complete copies of all other written documentation
          evidencing ownership and prosecution (if applicable) of each such
          item. (S) 3(m)(iii) of the Petrotech Disclosure Schedule also
          identifies each trade name or unregistered trademark used by the
          Acquired Company in connection with the Business. With respect to each
          item of Intellectual Property required to be identified in (S)
          3(m)(iii) of the Petrotech Disclosure Schedule:

                                     -18-

 
                (A) the Acquired Company possess all right, title, and interest
               in and to the item, free and clear of any Security Interest,
               license, or other restriction;

                (B) the item is not subject to any outstanding injunction,
               judgment, order, decree, ruling, or charge;

                (C) no action, suit, proceeding, hearing, investigation, charge,
               complaint, claim, or demand is pending or, to the Knowledge of
               the Acquired Company threatened, which challenges the legality,
               validity, enforceability, use, or ownership of the item; and

                (D) Neither the Acquired Company nor any Shareholder has ever
               agreed to indemnify any Person for or against any interference,
               infringement, misappropriation, or other conflict with respect to
               the item.

               (iv) (S) 3(m)(iv) of the Petrotech Disclosure Schedule identifies
        each item of Intellectual Property that any third party owns and that
        the Acquired Company uses pursuant to license, sublicense, agreement, or
        permission other than licenses for commercially available software
        involving standard license fees, which need not be listed. Petrotech has
        delivered to the Buyer correct and complete copies of all such licenses,
        sublicenses, agreements, and permissions (as amended to date). With
        respect to each item of Intellectual Property required to be identified
        in (S) 3(m)(iv) of the Petrotech Disclosure Schedule;

                (A) the license, sublicense, agreement, or permission covering
               the item is legal, valid, binding, enforceable, and in full force
               and effect;

                (B) the license, sublicense, agreement, or permission will
               continue to be legal, valid, binding, enforceable, and in full
               force and effect on identical terms following the consummation of
               the transactions contemplated hereby (including the Merger
               referred to in (S) 2 above);

                (C) The Acquired Company, and to the Knowledge of the Acquired
               Company, no other party to the license, sublicense, agreement, or
               permission, is in breach or default, and no event has occurred
               which with notice of lapse of time would constitute a breach or
               default or permit termination, modification, or acceleration
               thereunder;

                                     -19-

 
                (D)  The Acquired Company has not, and to the Knowledge of the
               Acquired Company, no other party to the license, sublicense,
               agreement, or permission has repudiated any provision thereof;

                (E) with respect to each sublicense, the representations and
               warranties set forth in subsections (A) through (D) above are
               true and correct with respect to the underlying license;

                (F) the underlying item of Intellectual Property is not subject
               to any outstanding injunction, judgment, order, decree, ruling,
               or charge;

                (G) no action, suit, proceeding, hearing, investigation, charge,
               complaint, claim or demand is pending or, to the Knowledge of the
               Acquired Company, threatened, which challenges the legality,
               validity, or enforceability of the underlying item of
               Intellectual Property; and

                (H) The Acquired Company has not granted any sublicense or
               similar right with respect to the license, sublicense, agreement,
               or permission.

        (n) Tangible Assets. The Acquired Company owns or leases all buildings,
     machinery, equipment, and other tangible assets necessary for the conduct
     of the Business as presently conducted, except for those items thereof
     which need to be acquired in the ordinary course of the normal day-to-day
     operations of the Business of the Acquired Company consistent with past
     practice. Each such tangible asset owned or leased by the Acquired Company
     is free from any known material defects, has been maintained in accordance
     with normal industry practice, is in good operating condition and repair
     (subject to normal wear and tear), and is suitable for the purposes for
     which it presently is used.

        (o) Inventory. The inventory of the Acquired Company consists of raw
     materials and supplies, manufactured and purchased parts, construction work
     in progress, goods in process, and finished goods, all of which is
     merchantable and fit for the purpose for which it was procured or
     manufactured, except for those items which have no value and none of which
     is slow-moving (except for parts and components on hand for servicing
     products already sold), obsolete, damaged, or defective.

        (p) Contracts. (S) 3(p) of the Petrotech Disclosure Schedule lists the
     following contracts and other agreements, written or oral, to which the
     Acquired Company is a party, exclusive of contracts with customers and
     related project documentation entered into in the Ordinary Course of
     Business, which need not be listed hereunder;

                                     -20-

 
                (i) any agreement (or group of related agreements) for the lease
          of personal property to or from any Person providing for lease
          payments in excess of $15,000 per annum;

                (ii) any agreement (or group of related agreements) for the
          purchase or sale of raw materials, commodities, supplies, products, or
          other personal property, or for the furnishing or receipt of services,
          the performance of which will extend over a period of more than one
          year, or which to the Knowledge of the Acquired Company, will result
          in a loss to the Acquired Company, or which involves consideration, in
          excess of $50,000;

                (iii) any agreement concerning a partnership or joint venture;

                (iv) any agreement (or group of related agreements) under which
          it has created, incurred, assumed, or guaranteed any indebtedness for
          borrowed money, or any capitalized lease obligation, under which it
          has imposed a Security Interest on any of its assets, tangible or
          intangible (other than the Company Loans) except as listed on Schedule
          3(p)(iv);

                (v) any agreement concerning confidentiality or noncompetition,
          other than with Parent;

                (vi) any agreement involving any Shareholder to which the
          Acquired Company is a party;

                (vii) any profit sharing, stock option, stock purchase, stock
          appreciation, deferred compensation, severance, or other plan or
          arrangement for the benefit of its current or former directors,
          officers, and employees;

                (viii) any agreement for the employment of any individual on a
          full-time, part-time, consulting, or other basis providing annual
          compensation in excess of $75,000 or providing severance benefits
          (other than accounting and legal consultants, which have no fixed
          annual compensation);

                (ix) any agreement under which it has advanced or loaned any
          amount to any of its directors, officers, and employees;

                                     -21-

 
                (x) any agreement not already listed herein or on the Petrotech
          Disclosure Schedule under which the consequences of a default or
          termination would have an adverse effect in the amount of $50,000 or
          more on the business, financial condition, operations or results of
          operations of the Acquired Company; or

                (xi) any other agreement (or group of related agreements) the
          performance of which involves consideration in excess of $50,000.

The Acquired Company has delivered to the Buyer a correct and complete copy of
each written agreement listed in (S) 3(p) of the Petrotech Disclosure Schedule
(as amended to date) and the listing in (S) 3(p) of the Petrotech Disclosure
Schedule is a written summary setting forth the terms and conditions of each
oral agreement referred to in (S) 3(p) of the Petrotech Disclosure Schedule.
With respect to each such agreement: (A) the agreement is legal, valid, binding,
enforceable, and in full force and effect, subject to applicable bankruptcy,
insolvency, fraudulent conveyance or transfer, reorganization, arrangement,
moratorium or other similar laws from time to time affecting creditor's rights
generally; (B) to the Knowledge of the Acquired Company, the agreement will
continue to be legal, valid, binding, enforceable, and in full force and effect
on identical terms following the consummation of the transactions contemplated
hereby (including the assignments and assumptions referred to in (S) 2 above),
subject to applicable bankruptcy, insolvency, fraudulent conveyance or transfer,
reorganization, arrangement, moratorium or other similar laws from time to time
affecting creditor's rights generally; (C) the Acquired Company is not, and to
the Knowledge of the Acquired Company, no other party, is in material breach or
default, and no event has occurred which with notice or lapse of time would
constitute a material breach or default, or permit termination, modification, or
acceleration, under the agreements; and (D) no party has repudiated any
provision of the agreement.

        (q) Notes and Accounts Receivable. Notes and accounts receivable of the
Acquired Company included among the assets are at least an aggregate face amount
as of the Closing Date as set forth on the list of aged receivables to be
delivered at Closing and set forth on Exhibit C and all such notes and accounts
receivable are reflected properly on their books and records, are valid
receivables subject to no setoffs or counterclaims, are current and collectible,
subject only to the reserve for bad debts set forth on the face of the Financial
Statements, except that no representation shall be made with respect to accounts
receivable outstanding longer than 90 days from invoice date, which will be
treated as described in (S) 7.

        (r) Powers of Attorney. There are no outstanding powers of attorney
executed on behalf of the Acquired Company, except as set forth on Schedule
3(r).

                                     -22-

 
        (s) Insurance. The Acquired Company has provided the Buyer with each
insurance policy (including policies providing property, casualty, liability,
and workers' compensation coverage and bond and surety arrangements) to which
the Acquired Company has been a party, a named insured, or otherwise the
beneficiary of coverage at any time within the past seven 7 years.

Except as described on Schedule 3(s), with respect to each such insurance
policy: (A) all policy premiums due to date have been paid in full, and to the
Knowledge of the Acquired Company, the policy is legal, valid, binding,
enforceable, and in full force and effect with respect to the periods for which
it purports to provide coverage subject to applicable bankruptcy, insolvency,
fraudulent conveyance or transfer, reorganization, arrangement or moratorium or
other similar laws from time to time affecting creditor's rights generally; (B)
the Acquired Company or, to the Knowledge of the Acquired Company, any other
party to the policy is not in breach or default (including with respect to the
payment of premiums or the giving of notices), and no event has occurred which,
with notice or the lapse of time, would constitute such a breach or default, or
permit termination, modification, or acceleration, under the policy; and (C) no
party to the policy has repudiated any provision thereof. Section 3(s) of the
Petrotech Disclosure Schedule describes any self-insurance arrangements
affecting the Acquired Company.

        (t) Litigation. The Acquired Company (i) is not subject to any
outstanding injunction, judgment, order, decree, ruling, or charge and (ii) is
not a party nor, to the Knowledge of the Acquired Company, is threatened to be
made a party to any action, suit, proceeding, hearing, or investigation of, in,
or before any court or quasi-judicial or administrative agency of any federal,
state, local, or foreign jurisdiction or before any arbitrator, other than as
set forth herein, and except as set forth in Schedule 3(t).

        (u) Warranty. Each product manufactured, sold, leased, or delivered by
the Acquired Company or service provided by the Acquired Company has been in
conformity with all applicable contractual commitments and all express and
implied warranties, and, except as set forth in the documentation with respect
to ongoing projects of the Acquired Company, the Acquired Company has no
Liability (and there is no Basis for any present or future action, suit,
proceeding, hearing, investigation, charge, complaint, claim, or demand against
it giving rise to any Liability) for replacement or repair thereof or other
damages in connection therewith. Except as otherwise may be provided by
applicable law, no product manufactured, sold, leased, or delivered by the
Acquired Company is subject to any guaranty, warranty, or other indemnity beyond
the applicable written terms and conditions of sale or lease set forth in the
Acquired Company's documentation with respect to such projects.

        (v) Product Liability. Except as set forth in Schedule 3(v), there are
no existing or, to the Knowledge of the Acquired Company, threatened, claims
against the Acquired Company arising out of any injury to individuals or

                                     -23-

 
property as a result of the ownership, possession, or use of any product
manufactured, sold, leased, or delivered by the Acquired Company which could
result in Liability to the Acquired Company and neither Petrotech nor the
Shareholders have any knowledge of a reasonable basis for any such claim.

        (w) Employees. Except as set forth in Schedule 3(w), to the Knowledge of
the Acquired Company, no executive, key employee, or group of employees has any
plans to terminate employment with the Acquired Company. The Acquired Company is
not a party to or bound by any collective bargaining agreement, nor has it
experienced any strikes, grievances, claims of unfair labor practice. The
Acquired Company has no Knowledge of any organizational effort presently being
made or threatened by or on behalf of any labor union with respect to its
employees. There is no claim outstanding or, to the Knowledge of the Acquired
Company, threatened or any Basis for a claim respecting employment of any past
or present employee of the Acquired Company including, without limitation,
claims of personal injury (unless fully covered by worker's compensation,
liability or indemnity insurance) discrimination, wage, hours or similar laws or
regulations.

        (x) Employee Benefits.

                (i) No other corporation, trade, business, or other entity,
          would, together with the Acquired Company, now or in the past 5 years,
          constitute a single employer within the meaning of Code (S) 414.

                (ii) Section 3(x) of the Petrotech Disclosure Schedule contains
          a true and complete list of all of the Employee Benefit Plans which
          are presently in effect or which have previously been in effect in the
          last 5 years for the benefit of current or former employees, officers,
          directors or consultants of the Acquired Company (the
          "Petrotech Plans").

                (iii) Except as set forth in (S) 3(x) of the Petrotech
          Disclosure Schedule, the Acquired Company does not maintain and has
          never maintained an "employee benefit pension plan," within the
          meaning of ERISA (S) 3(2), that is or was subject to Title IV of
          ERISA.

                (iv) There is no lien outstanding upon any Assets pursuant to
          Code (S) 412(n) in favor of any of the Petrotech Plans. No Assets or
          assets of any Affiliate have been provided as security to any of the
          Petrotech Plans pursuant to Code (S) 401(a)(29).

                (v) Except as set forth in (S) 3(x) of the Petrotech Disclosure
          Schedule, Petrotech has no past, present or future obligation or
          liability to contribute to any multiemployer plan as defined in ERISA
          (S) 3(37).

                                     -24-

 
                (vi) Petrotech has complied in all material respects with the
          continuation health coverage requirements of Code (S) 4980B and ERISA
          (S)(S) 601 through 608.

                (vii) Petrotech is not obligated, contingently or otherwise,
          under any agreement to pay any amount which would be treated as a
          "parachute payment," as defined in Code (S) 280G(b) (determined
          without regard to Code (S) 280G(b)(2)(A)(ii)).

                (viii) With respect to each of the Petrotech Plans, except as
          set forth in (S) 3(x) of the Petrotech Disclosure Schedule:

                        (A) each of the Petrotech Plans has been established,
               maintained, funded and administered in all material respects in
               accordance with its governing documents, and any applicable
               provisions of ERISA, the Internal Revenue Code of 1986 (the
               "IRC"), other applicable law, and all regulations promulgated
               thereunder;

                        (B) none of the Petrotech Plans nor any fiduciary has
               engaged in a prohibited transaction as defined in ERISA (S) 406
               or IRC (S) 4975 (for which no individual or class exemption exist
               under ERISA (S) 408 or IRC (S) 4975, respectively);

                        (C) all filings and reports as to each of the Petrotech
               Plans required to have been made on or before the Closing Date to
               the Internal Revenue Service, or to the United States Department
               of Labor or to the Pension Benefit Guaranty Corporation, have
               been or will be duly made by that date;

                        (D) each of the Petrotech Plans which is intended to
               qualify as a tax-qualified retirement plan under IRC (S) 401(a)
               has received a favorable determination letter(s) from the
               Internal Revenue Service as to qualification of such Petrotech
               Plan for the period from its adoption through the Closing Date;
               nothing has occurred, whether by action or failure to act, which
               has resulted in or would cause the loss of such qualification;
               and each trust thereunder is exempt from tax pursuant to IRC (S)
               501(a);

                        (E) each of the Petrotech Plans which is required to
               satisfy IRC (S)(S) 401(k)(3) or 401(m)(2) has been tested for
               compliance with, and has satisfied the requirements of, IRC
               (S)(S) 401(k)(3) and 401(m)(2) for each plan year ending prior to
               the Closing Date;

                                     -25-

 
                        (F) no event has occurred and no condition exists
               relating to any of the Petrotech Plans that would subject the
               Acquired Company to any tax or Liability under IRS (S)(S) 4971,
               4972 or 4979, or to any Liability under ERISA (S)(S) 502 or 4071;
               and

                        (G) to the extent applicable, each of the Petrotech
               Plans has been funded in accordance with its governing documents,
               ERISA and the IRC, has not experienced any accumulated funding
               deficiency (whether or not waived) and has not exceeded its full
               funding limitation (within the meaning of IRC (S) 412) at any
               time.

                (ix) With respect to the Petrotech Plans which provide group
          health benefits to employees of the Acquired Company and are subject
          to the requirements of IRC (S) 4980B and ERISA Title I Part 6
          ("COBRA"), such group health plan has been administered in every
          material respect in accordance with its governing documents and COBRA.

                (x)  With respect to employee benefit matters generally:

                        (A) the Acquired Company (nor any person, firm or
               corporation which is or has been under common control within the
               meaning of Section 4001(b) of ERISA of the Acquired Company) does
               not maintain or contribute to or has ever maintained or
               contributed to any Petrotech Plan subject to Title IV of ERISA;

                        (B) except as set forth on (S) 3(x) of the Petrotech
               Disclosure Schedule, the consummation of the transactions
               contemplated hereby will not accelerate or increase any Liability
               under any of the Petrotech Plans because of an acceleration or
               increase of any of the rights or benefits to which Petrotech Plan
               participants or beneficiaries may be entitled thereunder;

                        (C) except as set forth on (S) 3(x) of the Petrotech
               Disclosure Schedule, the Acquired Company has no obligation to
               any retired or former employee or any current employee of the
               Company upon retirement or termination of employment under any
               Petrotech Plans, other than such obligations imposed by COBRA;
               and

                        (D) except as set forth on (S) 3(x) of the Petrotech
               Disclosure Schedule, any of the Petrotech Plans which is an
               "employee welfare benefit plan," within the meaning of ERISA (S)
               3(1), may be terminated prospectively without Liability to the
               Acquired Company or Parent or Buyer, including, without
               limitation, Liability for unreported (e.g., run-off) benefit
               claims, premium adjustments or termination charges of any kind.

                                     -26-

 
        (y) Guaranties. The Acquired Company is not a guarantor or otherwise
liable for any Liability or obligation (including indebtedness) of any other
Person (except for indemnities under project documentation of the Acquired
Company).

        (z) Environment, Health, and Safety.

                (i) The Acquired Company has complied with all Environmental,
          Health, and Safety Laws, the failure to comply with which could result
          in Adverse Consequences in an amount in excess of $25,000 individually
          or in the aggregate, and no action, suit, proceeding, hearing,
          investigation, charge, complaint, claim, demand, or notice has been
          filed or commenced against the Acquired Company alleging such failure.

                (ii) The Acquired Company has no Liability (and the Acquired
          Company, to its Knowledge, has not handled used, stored, treated,
          recycled, or disposed of any Hazardous Substance, arranged for the
          disposal of any Hazardous Substance, exposed any employee or other
          individual to any Hazardous Substance or owned or operated any
          property or facility in any manner that could form the Basis for any
          present or future action, suit, proceeding, hearing, investigations,
          charge, complaint, claim or demand giving rise to any Liability) for
          penalties, investigations of or damage to any site, location, body of
          water (surface or subsurface), or other natural resource, for any
          illness of or personal injury to any employee or other individual, or
          for any reason under any Environmental, Health, and Safety Laws.

                (iii) Except as set forth in (S) 3(z) of the Petrotech
          Disclosure Schedule, all properties and equipment used in the Business
          are and in the past have been free of any amounts of Hazardous
          Substances, the presence of which could result in Adverse
          Consequences.

                (iv) Except as set forth in (S) 3(z) of the Petrotech Disclosure
          Schedule, there are no in-service or out-of-service underground or
          above ground storage tanks.

        (aa) Certain Business Relationships With the Acquired Company. Except as
set forth in (S) 3(aa) of the Petrotech Disclosure Schedule, none of the
Shareholders or their relatives has been involved directly or indirectly in any
business arrangement or relationship with Petrotech within the past 36 months,
and, except for the Leased Real Property and automobile leases of the
Shareholders, none of the Shareholders owns any asset, tangible or intangible,
which is used in the Business.

                                     -27-

 
        (ab) Disclosure. To the Knowledge of the Acquired Company, the
    representations and warranties contained in this (S) 3 (including the
    Petrotech Disclosure Schedule) do not as of the Closing Date contain any
    untrue statement of a material fact or omit to state any material fact
    necessary in order to make the statement and information contained in this
    (S) 3 not misleading.

  4.  REPRESENTATIONS AND WARRANTIES OF THE BUYER.  Parent and Buyer, jointly
and severally, represent and warrant to the Shareholders that the statements
contained in this (S) 4 are correct and complete as of Closing Date, except as
set forth in the disclosure schedule prepared by Buyer accompanying this
Agreement and initialed by the Parties (the "Buyer Disclosure Schedule").  The
Buyer Disclosure Schedule will be arranged in paragraphs corresponding to the
lettered and numbered paragraphs contained in this (S) 4.

        (a) Organization of the Buyer. Each of Parent and Buyer is a corporation
     duly organized, validly existing, and in good standing under the laws of
     the jurisdiction of its incorporation and is duly qualified as a foreign
     corporation to do business in every jurisdiction where such qualification
     is required.

        (b) Authorization of Transaction. Each of Parent and Buyer has full
     power and authority (including full corporate power and authority) to
     execute and deliver this Agreement and to perform its obligations
     hereunder. This Agreement constitutes the valid and legally binding
     obligation of Parent and Buyer, enforceable in accordance with its terms
     and conditions.  Parent and Buyer need not give any notice to, make any
     filing with, or obtain any authorization, consent, or approval of any
     government or governmental agencies in order for the Parties to consummate
     the transactions contemplated by this Agreement (including the assignment
     and assumption referred to in (S) 2 above) other than the notification and
     approval under the Hart-Scott-Rodino Act.

        (c) Noncontravention. Neither the execution and the delivery of this
     Agreement, nor the consummation of the transactions contemplated hereby
     (including the assignments and assumptions referred to in (S) 2 above) will
     (i) violate any constitution, state, regulation, rule, injunction,
     judgment, order, decree, ruling, charge, or other restriction of any
     government, governmental agency, or court to which Parent or Buyer is
     subject, or any provision of its charter or bylaws or (ii) conflict with,
     result in a breach of, constitute a default under, result in the
     acceleration of, create in any party the right to accelerate, terminate,
     modify, or cancel, or require any notice under any agreement, contract,
     lease, license, instrument, or other arrangement to which Parent or Buyer
     is a party or by which they are bound or to which any of their assets are
     subject.

        (d) Broker's Fees. Neither Parent nor Buyer has Liability or obligation
     to pay any fees or commissions to any broker, finder, or agent with respect
     to the transactions contemplated by this Agreement for which the
     Shareholders could become liable or obligated.

                                     -28-

 
        (e) Disclosure. To the Knowledge of Parent and Buyer, (i) the
     representations and warranties contained in this (S) 4 (including the Buyer
     Disclosure Schedule) do not contain any untrue statements of a material
     fact or omit to state any material fact necessary in order to make the
     statements contained in this (S) 4 not misleading and (ii) the Public
     Information did not, as of the date of its release, contain any untrue
     statement of a material fact or omit to state a material fact necessary in
     order to make the statements contained therein not misleading.

        (f) Financial Statements. Attached hereto as Exhibit D are the following
     financial statements of the Parent (collectively the "Parent Financial
     Statements"):

                (i) audited balance sheets, statements of income, changes in
          shareholders' equity, and cash flow as of and for the fiscal year
          ended October 31, 1996; and

                (ii) unaudited balance sheet and statement of income, change in
          shareholders' equity, and cash flow as of and for the quarter ended
          January 31, 1997.

      The Parent Financial Statements (including the notes thereto) have been
      prepared in accordance with GAAP applied on a consistent basis throughout
      the periods covered thereby, present fairly the financial condition of
      Parent as of such dates and the results of operations of Parent for such
      periods (subject in the case of interim statements only to normal year-end
      adjustments which in the aggregate are not material), are correct and
      complete, and are consistent with the books and records of Parent (which
      books and records are correct and complete).

        (g) Events Subsequent to Most Recent Fiscal Quarter End. Since January
      31, 1997, there has not been any material adverse change in the business,
      financial condition, operations, or results of operations of Parent.

  5.  CONDITIONS TO OBLIGATION TO CLOSE.

        (a)  Conditions to Obligation of Parent and Buyer.  The obligation of
      Parent and Buyer to consummate the transactions to be performed by it in
      connection with the Closing is subject to satisfaction of the following
      conditions:

        (i) the representations and warranties set forth in (S) 3 above shall be
      true and correct in all material respects at and as of the Closing Date;

        (ii) Petrotech and the Shareholders shall have performed and complied
      with all of their covenants hereunder in all material respects through the
      Closing;

                                     -29-

 
     (iii)  no action, suit, or proceeding shall be pending or threatened before
  any court or quasi-judicial or administrative agency of any federal, state,
  local, or foreign jurisdiction or before any arbitrator wherein an unfavorable
  injunction, judgment, order, decree, ruling, or charge would (A) prevent
  consummation of any of the transactions contemplated by this Agreement (B)
  cause any of the transactions contemplated by this Agreement to be rescinded
  following consummation, or (C) affect adversely the right of the Buyer to own
  the assets of the Acquired Company or to operate the Business (and no such
  injunction, judgment, order, decree, ruling, or charge shall be in effect);

     (iv)   Petrotech shall have delivered to the Buyer a certificate to the
  effect that each of the conditions specified above in (S) 5(a)(i)-(iii) is
  satisfied in all respects;

     (v)   all applicable waiting periods (and any extensions thereof) under the
  Hart-Scott-Rodino Act shall have expired or otherwise been terminated;

     (vi)   Douglas W. Moore, Terry E Irwin and William A. Dyar shall each have
  entered into an Employment Agreement and a Noncompetition Agreement in form
  and substance as set forth in Exhibits E-1 through E-6 attached hereto and the
  same shall be in full force and effect;

     (vii)  the Buyer shall have received from counsel to the Acquired Company 
  an opinion in form and substance as set forth in Exhibit F attached hereto,
  addressed to the Buyer, and dated as of the Closing Date;

     (viii) the certificates of merger with respect to the Merger shall have
  been filed in accordance with the Louisiana Corporation Act and the Delaware
  Act; and

     (ix)   the amount necessary to pay and satisfy in full the Company Loans
  shall not exceed $9,026,326, exclusive of interest;

     (x)    all actions to be taken by the Acquired Company in connection with
  consummation of the transactions contemplated hereby and all certificates,
  opinions, instruments, and other documents required to effect the transactions
  contemplated hereby will be reasonably satisfactory in form and substance to
  the Buyer;

     (xi)   Petrotech shall provide Buyer and Parent with a true and complete 
  copy of the written consent from Chevron with respect to the 3520 General
  DeGaulle Drive property, from the landlord of the 7121 North Loop East,
  Houston, Texas property and from the landlord of the Northway 10, Executive
  Park, Ballston Lake, New York property;

                                      -30-

 
     (xii)  with respect to the Leased Real Property, the Buyer shall receive
  estoppel letters from each landlord in the form attached as Exhibit G; and

     (xiii) with respect to the Affiliate Leased Real Property, each lease shall
  be amended in the form attached hereto as Exhibit A-1 through A-3.

     (xiv) the spouse of any Shareholder shall have executed an appropriate
  consent or joinder with respect to the obligations of the Shareholders under
  this Agreement.

The Buyer may waive any condition specified in this (S) 5(a) if it executes a
writing so stating at or prior to the Closing.

     (b) Conditions to Obligation of Sellers. The obligation of Shareholders to
consummate the transactions to be performed by it in connection with the Closing
is subject to satisfaction of the following conditions:

     (i) the representations and warranties set forth in (S) 4 above shall be
  true and correct in all material respects at and as of the Closing Date;

     (ii)  Parent and Buyer shall have performed and complied with all of its
  covenants hereunder in all material respects through the Closing;

     (iii) no action, suit, or proceeding shall be pending or threatened before
  any court or quasi-judicial or administrative agency of any federal, state,
  local, or foreign jurisdiction or before any arbitrator wherein an unfavorable
  injunction, judgment, order, decree, ruling, or charge would (A) prevent
  consummation of any of the transactions contemplated by this Agreement or (B)
  cause any of the transactions contemplated by this Agreement to be rescinded
  following consummation (and no such injunction, judgment, order, decree,
  ruling, or charge shall be in effect);

     (iv)  the Buyer shall have delivered to Petrotech a certificate to the
  effect that each of the conditions specified above in (S) 5(b)(i)-(iii) is
  satisfied in all respects;

     (v)   all applicable waiting periods (and any extensions thereof) under the
  Hart-Scott-Rodino Act shall have expired or otherwise been terminated;

                                      -31-

 
         (vi)   Petrotech shall have received from counsel to the Buyer an 
      opinion form and substance as set forth in Exhibit H attached hereto,
      addressed to Petrotech, and dated as of the Closing Date;

         (vii)  Buyer shall have caused the Company Loans (except the Sellers 
      Loan) to be paid and satisfied in full;

         (viii) all actions to be taken by the Buyer in connection with
      consummation of the transactions contemplated hereby and all certificates,
      opinions, instruments, and other documents required to effect the
      transactions contemplated hereby will be reasonably satisfactory in form
      and substance to Petrotech; and

         (ix)   Parent shall have delivered to Petrotech and the Shareholders
      resolutions from its Board of Directors (or Compensation Committee)
      granting options under Parent's 1991 Stock Option Plan to individuals as
      set forth on Exhibit I.

    The Shareholders may waive any condition specified in this (S) 5(b) if it
    executes a writing so stating at a prior to the Closing.

    6. POST-CLOSING COVENANTS. The Parties agree as follows with respect to the
period following the Closing.

       (a) General. In case at any time after the Closing any further action is
    necessary to carry out the purposes of this Agreement, each of the
    Shareholders and Buyer will take such further action (including the
    execution and delivery of such further instruments and documents) as any
    other Party reasonably may request, at the sole cost and expense of the
    requesting Party (unless the requesting Party is entitled to indemnification
    therefor hereunder). The Shareholders acknowledge and agree that from and
    after the Closing the Buyer will have the right to possession of all
    documents, books, records (including Tax records), agreements, and financial
    data of any sort relating to the Acquired Company in this Agreement;
    provided, however, that the Shareholders shall have the right to obtain
    access to such documents, books, records (including Tax records),
    agreements, and financial data and make photocopies thereof for a proper
    purpose, such as in connection with the preparation of their tax returns.

       (b)  Litigation Support.  In the event and for so long as any Party 
    actively is contesting or defending against any action, suit, proceeding,
    hearing, investigation, charge, complaint, claim or demand in connection
    with (i) any transaction contemplated under this Agreement or (ii) any fact,
    situation, circumstance, status, condition, activity, practice, plan,
    occurrence, event, incident, action, failure to act, or transaction on or
    prior to the Closing Date involving the Surviving Corporation or any
    Shareholder, each of the other Parties will reasonably cooperate with the
    contesting or defending Party and his or its

                                      -32-

 
    counsel in the contest or defense, make available his or its personnel, and
    provide such testimony and access to his or its books and records as shall
    be necessary in connection with the contest or defense, all at the sole cost
    and expense of the contesting or defending Party (unless the contesting or
    defending Party is entitled to indemnification therefor under (S) 7 below).

       (c) Transition. Each of the Shareholders will use his best efforts not to
    take any action that is designed or intended to have the effect of
    discouraging any lessor, licensor, customer, supplier, or other business
    associate of the Acquired Company from maintaining the same business
    relationships with the Surviving Corporation after the Closing as it
    maintained with the Acquired Company prior to the Closing.

       (d) Confidentiality. Each Shareholder will treat and hold as confidential
     all of the Confidential Information, refrain from using any of the
     Confidential Information and deliver promptly to the Surviving Corporation
     or destroy, at the request and option of the Surviving Corporation, all
     tangible embodiments (and all copies) of the Confidential Information which
     are in his or its possession. In the event that a Shareholder is requested
     or required (by oral question or request for information or documents in
     any legal proceeding, interrogatory, subpoena, civil investigative demand,
     or similar process) to disclose any Confidential Information, that Party
     will notify the Surviving Corporation promptly of the request or
     requirement so that the Surviving Corporation may seek an appropriate
     protective order or waive compliance with the provisions of this (S) 6(d).
     If, in the absence of a protective order or the receipt of a waiver
     hereunder, a Shareholder is, on the advice of counsel, compelled to
     disclose any Confidential Information to any tribunal or else stand liable
     for contempt, that Party may disclose the Confidential Information to the
     tribunal; provided, however, that a Shareholder shall use its reasonable
     efforts to obtain, at the reasonable request of the Surviving Corporation
     and at the Surviving Corporation's sole expense, an order or other
     assurance that confidential treatment will be accorded to such portion of
     the Confidential Information required to be disclosed as the Surviving
     Corporation shall designate.

       (e)  Parent Shares.  The Shareholders covenant and agree that they 
    shall hold Parent Shares for a period of not less than one (1) year
    following the Closing Date and they shall not sell, transfer or otherwise
    dispose of such Parent Shares during such period except for donations to
    relatives of Shareholders or their wives, and then only as permitted by Rule
    144 of the Securities Act and subject to the holding requirements hereof.
    The Parent Shares shall contain an appropriate legend reflecting the
    understanding of the Parties as to the holding period of the Parent Shares
    set forth herein.

                                      -33-

 
    7. REMEDIES FOR BREACHES OF THIS AGREEMENT.

       (a)  Survival of Representations and Warranties.  All of the 
    representations and warranties contained in (S) 3(g)--(ab), except (S) 3(k)
    and 3(x), of this Agreement and of Buyer contained in (S) 4(d)-(g) of this
    Agreement shall survive the Closing and continue in full force and effect
    for a period of 1 year thereafter; the representations and warranties
    contained in (S) 3(k) and (S) 3(x) shall survive the Closing and continue in
    full force and effect for a period of 30 days following the applicable
    statute of limitations with respect to such matters; all of the other
    representations, warranties, covenants, indemnities, and other agreements of
    the Buyer and the Shareholders contained in this Agreement (including the
    representations and warranties contained in (S) 3(a)-(f) and (S) 4(a)-(c))
    shall survive the Closing and continue in full force and effect forever
    thereafter, subject to any applicable statues of limitations. No action,
    claim, or proceeding may be brought by any Party hereto against any other
    Party resulting from, arising out of, or caused by a breach of a
    representation or warranty contained herein, or the failure to perform any
    covenant or other obligations hereunder, after the time such representation,
    warranty or covenant ceases to survive pursuant to the preceding sentence,
    unless written notice of such claim setting forth with specificity the basis
    for such claim is delivered to the applicable Party prior to such time.

    (b) Indemnification Provisions for Benefit of the Parent and the Buyer.

        (i) In the event a Shareholder breaches (or in the event any third party
    alleges facts that, if true, would mean Shareholder has breached) any of its
    representations, warranties, and covenants contained in this Agreement, and,
    if there is an applicable survival period pursuant to (S) 7(a) above,
    provided that the Buyer makes a written claim for indemnification setting
    forth the basis for such claim against the Shareholders pursuant to (S) 8(g)
    below within such survival period, then each of the Shareholders jointly and
    severally agrees to indemnify Parent, Buyer and the Surviving Corporation,
    subject to the limitations set forth herein, from and against the entirety
    of any Adverse Consequences the Parent, the Buyer or the Surviving
    Corporation may suffer through and after the date of the claim for
    indemnification (including any Adverse Consequences the Parent, the Buyer or
    the Surviving Corporation may suffer after the end of any applicable
    survival period) resulting from, arising out of, or caused by the breach (or
    the alleged breach); provided, however, that

            (w) The Shareholders shall not have any obligation to indemnify the
        Buyer from and against any Adverse Consequences resulting from, arising
        out of, or caused by the breach (or alleged breach) of any
        representation, warranty or covenant contained in (S) 3(g)-(ab) of the
        Agreement which exceed the funds escrowed pursuant to the Escrow
        Agreement; and

                                      -34-

 
            (x) The Shareholders shall have no such indemnification obligation
        with respect to such (S) 3(g)-(ab) (excluding (S) 3(q)) breaches (or
        alleged breaches) until the Buyer has suffered Adverse Consequences by
        reason thereof in excess of One Hundred Seventy-Five Thousand Dollars
        ($175,000). No such restriction shall be applicable to the
        representations and warranties contained in (S) 3(a)-(f) and (S) 3(q).

        (ii) Each of the Shareholders jointly and severally agrees to indemnify
    Parent, Buyer and the Surviving Corporation for any foreign or domestic
    worker's compensation claims incurred by any employee, consultant,
    independent contractor, agent, affiliate or other individual of the Acquired
    Company prior to Closing, including, without limitation any claims for
    personal injuries, property damages and lost wages, except to the extent
    coverage is provided for such claims under the Acquired Company's applicable
    insurance policy. Such indemnification shall not be limited in time or
    amount or subject to any deductible or cap.

        (iii) Each of the Shareholders jointly and severally, agrees to
    indemnify Parent, Buyer and the Surviving Corporation for any damages
    (including costs of cleanup, containment, or other remediation) arising,
    directly or indirectly from or in connection with any Environmental, Health,
    and Safety Laws arising out of or relating to: (A) the ownership, operation,
    or condition at any time on or prior to the Closing Date of any facilities
    or any other properties and assets (whether real, personal, or mixed and
    whether tangible or intangible) in which Petrotech has or had an interest,
    (B) any Hazardous Substances that were present on the facilities or such
    other properties and assets at any time on or prior to the Closing Date, or
    (C) any Hazardous Substances, wherever located, that were, or were
    allegedly, used, generated, recycled, disposed, transported, stored,
    treated, released, or otherwise handled by Petrotech or by any other person
    for whose conduct they are or may be held responsible at any time on or
    prior to the Closing Date.

        (iv) Each of the Shareholders jointly and severally agrees to indemnify
    and reimburse the Surviving Corporation upon demand for the full amount of
    any accounts receivable of Petrotech which were (A) invoiced more than
    ninety (90) days prior to the Closing Date and (B) remain uncollected by the
    Surviving Corporation one hundred eighty (180) days following the Closing
    Date. Within a reasonable time following such 180 day period, Parent or the
    Surviving Corporation shall provide the Shareholders with a reconciliation
    of such accounts receivable and certify to the Shareholders that such
    receivables remain unpaid. The Shareholders shall pay to the Surviving
    Corporation or Parent such uncollected amount within ten (10) days following
    receipt of such reconciliation and certification.

                                      -35-

 
        (v) As security for the indemnification obligations of Shareholders
    under this Agreement, the Parties shall enter into the Escrow Agreement as
    of the Closing Date in the form and substance as set forth in Exhibit J,
    which shall be funded with $1,324,000 of the Cash Consideration otherwise
    payable to the Shareholders (the "Escrow Funds") The amount of $300,000
    shall be exclusively allocated from the Escrow Funds for the indemnification
    obligations of Shareholders under (S) 7(b)(iv) of this Agreement (the
    "Receivables Funds"). In the event indemnification obligations under (S)
    7(b)(iv) are less than or equal to $300,000, Parent or the Surviving
    Corporation shall be paid from the Receivables Funds the amount owed at the
    time specified under (S) 7(b)(iv), and Shareholders shall receive from the
    Escrow Funds the balance of the Receivables Funds remaining at that time.
    The Receivables Funds shall be the exclusive remedy of Parent or the
    Surviving Corporation in the event Shareholders indemnification obligations
    under (S) 7(b)(iv) are $300,000 or less. In the event indemnification
    obligations under (S) 7(b)(iv) are greater than $300,000, Parent or the
    Surviving Corporation shall have the option of (i) receiving payment of all
    of the Receivables Funds and the amount owed in excess of $300,000 from the
    Escrow Funds, or (ii) receiving payment of all of the Receivables Funds and
    the amount owed in excess of $300,000 directly from the Shareholders. The
    amount of the Escrow Funds shall be reduced at the first anniversary of the
    Closing Date to $75,000 (except with respect to claims then outstanding)
    and, solely with respect to claims under (S) 3(k) and (S) 3(x), shall
    continue until the third anniversary of the Closing Date.

        (vi) Notwithstanding the foregoing, the Liability of any Shareholder
    under this (S) 7 shall not exceed the percentage of the Merger Consideration
    set opposite such Shareholder's name below:

                  Shareholder           Percentage of Merger Consideration
                  -----------           ----------------------------------

               Douglas W. Moore                           37.5%

               William A. Dyar, individually
                and William A. Dyar and                   37.5%
                Marguerite S. Dyar Charitable
                Remainder Trust

               Terry E Irwin                              25%

        (vii) In addition to the foregoing, each of the Shareholders jointly and
    severally agrees to indemnify the Parent, Buyer and the Surviving
    Corporation from and against any Adverse Consequences arising out of the
    nonpayment of employee loans referenced in Petrotech Disclosure Schedule (S)
    3(p)(ix).

    (c) Indemnification Provisions for Benefit of the Shareholders.

                                      -36-

 
        In the event Parent or Buyer breaches (or in the event any third party
    alleges facts that, if true, would mean Parent or Buyer has breached) any of
    their representations, warranties, and covenants contained in this
    Agreement, and, if there is an applicable survival period pursuant to (S)
    7(a) above, provided that the Shareholders makes a written claim for
    indemnification setting forth with specificity the basis for such claim
    against Parent or Buyer pursuant to (S) 8(g) below within such survival
    period, then Parent and Buyer jointly and severally agree to indemnify the
    Shareholders from and against the entirety of any Adverse Consequences (up
    to but not in excess of the Merger Consideration) the Shareholders may
    suffer through and after the date of the claim for indemnification
    (including any Adverse Consequences the Shareholders may suffer after the
    end of any applicable survival period) resulting from, arising out of, or
    caused by the breach (or the alleged breach).

    (d) Matters Involving Third Parties.

        (i) If any third party shall notify any Party (the "Indemnified Party")
    with respect to any matter ( a "Third Party Claim") which may give rise to a
    claim for indemnification against any other Party (the "Indemnifying Party")
    under this (S) 7, then the Indemnified Party shall promptly notify each
    Indemnifying Party thereof in writing; provided, however, that no delay on
    the part of the Indemnified Party in notifying any Indemnifying Party shall
    relieve the Indemnifying Party from any obligation hereunder unless (and
    then solely to the extent) the Indemnifying Party thereby is prejudiced.

        (ii) Any Indemnifying Party will have the right to defend the
    Indemnified Party against the Third Party Claim with counsel of its choice
    satisfactory to the Indemnified Party so long as (A) the Indemnifying Party
    notifies the Indemnified Party in writing within 15 days after the
    Indemnified Party has given notice of the Third Party Claim that the
    Indemnifying Party will indemnify the Indemnified Party from and against the
    entirety of any Adverse Consequences the Indemnified Party may suffer
    resulting from, arising out of, relating to, in the nature of, or caused by
    the Third Party Claim, (B) the Indemnifying Party provides the Indemnified
    Party with evidence reasonably acceptable to the Indemnified Party that the
    Indemnifying Party will have the financial resources to defend against the
    Third Party Claim and fulfill its indemnification obligations hereunder, (C)
    the Third Party Claim involves only money damages and does not seek an
    injunction or other equitable relief, (D) settlement of, or an adverse
    judgment with respect to, the Third Party Claim is not, in the good faith
    judgment of the Indemnified Party, likely to establish a precedential custom
    or practice materially adverse to the continuing business interest of the
    Indemnified Party, and (E) the Indemnifying Party conducts the defense of
    the Third Party Claim actively and diligently.

                                      -37-

 
          (iii) So long as the Indemnifying Party is conducting the defense of 
      the Third Party Claim in accordance with (S) 7(d)(ii) above, (A) the
      Indemnified Party may retain separate co-counsel at its sole cost and
      expense and participate in the defense of the Third Party Claim, (B) the
      Indemnified Party will not consent to the entry of any judgment or enter
      into any settlement with respect to the Third Party Claim without the
      prior written consent of the Indemnifying Party (not to be withheld
      unreasonably).

          (iv) In the event any of the conditions in 7(d)(ii) above is or 
      becomes unsatisfied, however, (A) the Indemnified Party may defend
      against, and consent to the entry of any judgment or enter into any
      settlement with respect to, the Third Party Claim in any manner it may
      deem appropriate (and the Indemnified Party need not consult with, or
      obtain any consent from, any Indemnifying Party in connection therewith),
      (B) the Indemnifying Parties will reimburse the Indemnified Party promptly
      and periodically for the costs of defending against the Third Party Claim
      (including reasonable attorneys' fees and expenses), and (C) the
      Indemnifying Parties will remain responsible for any Adverse Consequences
      the Indemnified Party may suffer resulting, arising out of, relating to,
      in the nature of, or caused by the Third Party Claim to the fullest extent
      provided in this (S) 7.

       (e)  Determination of Adverse Consequences.  The Parties shall take into 
    account the time cost of money (using the Applicable Rate as the discount
    rate) in determining Adverse Consequences for purposes of this (S) 7. All
    indemnification payments under this (S) 7 shall be deemed adjustments to the
    Merger Consideration.

       (f)  Post-Closing.  Following the Closing, the remedy of the 
    Shareholders, on the one hand, and Parent and the Buyer on the other hand,
    with respect to any breach or threatened breach of a representation,
    warranty or covenant contained herein or with respect to any event,
    circumstance or condition occurring on or before the Closing shall be
    limited to the enforcement of the indemnification obligations set forth in
    (S) 7; provided, however, that nothing provided in this (S) 7(f) shall limit
    the right of any Party to seek any equitable remedy available to enforce his
    or its rights hereunder in accordance with (S) 8 (n).

    8. MISCELLANEOUS.

       (a) Press Releases and Public Announcements. Neither Petrotech nor any
    Shareholder shall issue any press release or make any public announcement
    relating to the subject matter of this Agreement without the prior written
    approval of the Parent. Parent, upon prior notice to Petrotech, may make any
    public disclosure it believes in good faith is required or permitted by
    applicable law or any listing or trading agreement concerning its publicly-
    traded securities.

                                      -38-

 
       (b) No Third-Party Beneficiaries. This Agreement shall not confer any
    rights or remedies upon any Person other than the Parties and their
    respective successors and permitted assigns.

       (c) Entire Agreement. This Agreement (including the documents referred to
    herein) constitutes the entire agreement between the Parties and supersedes
    any prior understandings, agreements, or representations by or between the
    Parties, written or oral, to the extent they related in any way to the
    subject matter hereof.

       (d) Succession and Assignment. This Agreement shall be binding upon and
    inure to the benefit of the Parties named herein and their respective
    successors and permitted assigns. No Party may assign either this Agreement
    or any of its rights, interests, or obligations hereunder without the prior
    written approval of the other Party; provided, however, that the Buyer may
    (i) assign any or all of its rights and interests hereunder to one or more
    of its affiliates and (ii) designate one or more of its affiliates to
    perform its obligations hereunder (in any or all of which cases the Buyer
    nonetheless shall remain responsible for the performance of all of its
    obligations hereunder).

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

       (f) Headings. The section headings contained in this Agreement are
    inserted for convenience only and shall not affect in any way the meaning or
    interpretation of this Agreement.

       (g) Notices. All notices, requests, demands, claims, and other
    communications hereunder will be in writing. Any notice, request, demand,
    claim, or other communication hereunder shall be deemed duly given if (and
    then two business days after) it is sent by registered or certified mail,
    return receipt requested, postage prepaid, and addressed to the intended
    recipient as set forth below:

If to Petrotech and the Shareholders:



                                           
    Petrotech, Inc.                    Copy to:  Charles N. Miller, Jr., Esq.
    Mr. Douglas W. Moore, President              210 Baronne Street, Suite 605
    108 Jarrell Drive                            New Orleans, LA  70112
    Belle Chasse, LA  70037

and

    Mr. Douglas W. Moore                         Mr. William A. Dyar
    113 Noble Drive                              132 Willow Drive
    Belle Chasse, LA  70037                      Gretna, LA  70053
 

                                      -39-

 


                                    
    Mr. Terry E Irwin                     William A. Dyar and Marguerite S. Dyar
    62 Asphodel Drive                     Charitable Remainder Trust
    Marrero, LA  70072                    132 Willow Drive
                                          Gretna, LA  70053

If to Buyer or Parent:
 
    Derrick N. Key              Copy to:  Shanler D. Cronk, Esq.
    Roper Industries, Inc.                Roper Industries, Inc.
    160 Ben Burton Road                   160 Ben Burton Road
    Bogart, Georgia  30622                Bogart, Georgia  30622
    (706) 369-7170                        (706) 369-7170


       Any Party may send any notice, request, demand, claim, or other
    communication hereunder to the intended recipient at the address set forth
    above using any other means (including personal delivery, expedited courier,
    messenger service, telecopy, telex, ordinary mail, or electronic mail), but
    no such notice, request, demand, claim, or other communication shall be
    deemed to have been duly given unless and until it actually is received by
    the intended recipient. Any Party may change the address to which notices,
    requests, demands, claims, and other communications hereunder are to be
    delivered by giving the other Party notice in the manner herein set forth.

       (h) Governing Law. This Agreement shall be governed by and construed in
    accordance with the domestic laws of the State of Delaware without giving
    effect to any choice or conflict of law provision or rule (whether of the
    State of Delaware or any other jurisdiction) that would cause the
    application of the laws of any jurisdiction other than the State of
    Delaware.

       (i) Amendments and Waivers. No amendment of any provision of this
    Agreement shall be valid unless the same shall be in writing and signed by
    each of the Parent, Buyer, Petrotech and the Shareholders. No waiver by any
    Party of any default, misrepresentation, or breach of warranty or covenant
    hereunder, whether intentional or not, shall be deemed to extend to any
    prior or subsequent default, misrepresentation, or breach of warranty or
    covenant hereunder or affect in any way any rights arising by virtue of any
    prior or subsequent such occurrence.

       (j) Severability. Any term or provision of this Agreement that is invalid
    or unenforceable in any situation in any jurisdiction shall not affect the
    validity or enforceability of the remaining terms and provisions hereof or
    the validity or enforceability of the offending term or provision in any
    other situation or in any other jurisdiction.

                                      -40-

 
        (k) Expenses. Buyer and each Shareholder will bear its (his) own costs
and expenses (including legal fees and expenses) incurred in connection with
this Agreement and the transactions contemplated hereby. The Shareholders shall
bear all such expenses incurred by Petrotech.

        (l) Construction. Any reference to any federal, state, local, or foreign
statute or law shall be deemed also to refer to all rules and regulations
promulgated thereunder, unless the context requires otherwise. The word
"including" shall mean including without limitation. Items set forth in the
Petrotech Disclosure Schedule or the Buyer Disclosure Schedule shall be deemed
an exception only to the representations and warranties for which they are
identified and any other representations and warranties to which the Petrotech
Disclosure Schedule or Buyer Disclosure Schedule with respect to such
representations and warranties contains an appropriate cross-reference.

        (m) Incorporation of Exhibits and Schedules. The Exhibits and Schedules
identified in this Agreement are incorporated herein by reference and made a
part hereof.

        (n) Specific Performance. Each of the Parties acknowledges and agrees
that the other Party would be damaged irreparably in the event any of the
provisions of this Agreement are not performed in accordance with their specific
terms or otherwise are breached. Accordingly, each of the Parties agrees that
the other Party shall be entitled to an injunction or injunctions to prevent
breaches of the provisions of this Agreement and to enforce specifically this
Agreement and the terms and provisions hereof in any action instituted in any
court of the United States or any state thereof having, in accordance with the
terms of this Agreement, jurisdiction over the Parties and the matter, in
addition to any other remedy to which it may be entitled, at law or in equity.

        (o) Submission to Jurisdiction. Each of the Parties submits to the
jurisdiction of any state or federal court sitting in Delaware in any action or
proceeding arising out of or relating to this Agreement and agrees that all
claims in respect of the action or proceeding may be heard and determined in any
such court. Each Party also agrees not to bring any action or proceeding arising
out of or relating to this Agreement in any other court. Each of the Parties
waives any defense of inconvenient forum to the maintenance of any action or
proceeding so brought and waives any bond, surety, or other security that might
be required of any other Party with respect thereto. Parent and Buyer appoints
The Prentice-Hall Corporation System, Inc. (the "Process Agent") as his or its
agent to receive on is or its behalf service of copies of the summons and
complaint and any other process that might be served in the action or
proceeding. Shareholders shall have service of process personally served to the
address listed in (S) 8(g) above. Any Party may make service on any other Party
by sending or delivering a copy of the process (i) to the Party to be served at
the address and in the manner provided for the giving of notices in (S) 8(g)
above or (ii) to the Party to be served in care of the Process Agent at the
address and in the manner provided for the giving of notices in (S) 8(g) above.
Each Party agrees that a final judgment in any

                                      -41-

 
action or proceeding so brought shall be conclusive and may be enforced by
suit on the judgment or in any other manner provided by law or in equity.

        (p) Dyar Guaranty. William A. Dyar, in addition to his individual
obligations as a Shareholder under this Agreement, shall fully and completely
guarantee any and all obligations of the William A. Dyar and Marguerite S. Dyar
Charitable Remainder Trust which may arise and exist under this Agreement.


        IN WITNESS WHEREOF, the Parties hereto have executed this Agreement on
the date first above written.

                                     BUYER
                                     Petrotech Acquisition, Inc.



                                     By:  /S/ MARTIN S. HEADLEY
                                          ---------------------
                                     Name:  Martin S. Headley
                                            -----------------
                                     Title:  Vice President
                                             --------------

                                     PARENT
                                     Roper Industries, Inc.



                                     By:  /S/ DERRICK N. KEY
                                          ------------------
                                          Derrick N. Key,
                                          President and Chief Executive Officer

                                     PETROTECH
                                     PetroTech, Inc.


                                     By:  /S/DOUGLAS W. MOORE
                                          -------------------
                                          Douglas W. Moore
                                          President



                      [SIGNATURES CONTINUED ON NEXT PAGE]

                                      -42-

 
                                     PETROTECH INTERNATIONAL, INC.
 


                                     BY:  /S/ DOUGLAS W. MOORE
                                          --------------------
                                     NAME:  DOUGLAS W. MOORE
                                            ----------------
                                     TITLE:  PRESIDENT
                                             ---------

 


                                     SHAREHOLDERS


                                     /S/ DOUGLAS W. MOORE
                                     --------------------
                                     DOUGLAS W. MOORE



                                     /S/ TERRY E. IRWIN
                                     ------------------
                                     TERRY E IRWIN



                                     /S/ WILLIAM. A. DYAR
                                     --------------------
                                     WILLIAM A. DYAR



                                     THE WILLIAM A. DYAR AND MARGUERITE 
                                     S. DYAR CHARITABLE REMAINDER TRUST



                                     BY:  /S/ TIMOTHY MURPHY
                                          ------------------
                                          TIMOTHY MURPHY
                                          INDEPENDENT SPECIAL TRUSTEE

                                      -43-

 
           CONSENT TO BE BOUND BY THE ABOVE AND FOREGOING AGREEMENT



           We, MARY DIMBERG MOORE, MARGUERITE SUE PIPKIN DYAR AND JO HELEN
McMORRIES IRWIN, declare and state that each of us is a spouse of a shareholder
in the above and foregoing Agreement and Plan of Merger; and we further declare
and state that we have read said Agreement and Plan of Merger and understand it
and approve it, including, without limitation, specifically approving and
authorizing the Plan of Merger and the sale thereunder of all of the issues and
outstanding shares of capital stock of Petrotech, Inc., which are in the names
of our respective husbands; and we hereby further agree to be bound by all of
the terms, conditions and provisions contained in said Agreement and Plan of
Merger, and hereby ratify and approve all actions which our husbands have taken
and will take in connection with consummating the transactions contemplated by
the Agreement and Plan of Merger.

           Thus done and signed by each of us on the 14th day of May, 1997.



                                               /S/ MARY DIMBERG MOORE
                                               ----------------------
                                               MARY DIMBERG MOORE


                                               /S/ MARGUERITE SUE PIPKIN DYAR
                                               ------------------------------
                                               MARGUERITE SUE PIPKIN DYAR


                                               /S/ JO HELEN McMORRIES IRWIN
                                               ----------------------------
                                               JO HELEN McMORRIES IRWIN