TANKNOLOGY ENVIRONMENTAL INC /TX/
8-K, 1996-11-12
CONSTRUCTION - SPECIAL TRADE CONTRACTORS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                      ------------------------------------





                                    FORM 8-K


                CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934



                        Date of Report: OCTOBER 25, 1996



                               Commission File No.
                                     0-18899


                         TANKNOLOGY ENVIRONMENTAL, INC.
             (Exact name of registrant as specified in its charter)




                  TEXAS                                   76-0284783
     (State or other jurisdiction of                    (IRS Employer
     incorporation or organization)                  Identification No.)

              5225 HOLLISTER
              HOUSTON, TEXAS                                 77040
(Address of principal executive offices)                  (Zip Code)

Registrant's telephone number, including area code:     (713) 690-8265





                                                       Page 1
                                                       Index to Exhibits appears
                                                       on page 9


<PAGE>


                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES


<TABLE>
<CAPTION>

                                      INDEX

                                                                         Page(s)


<S>         <C>                                                             <C>


Item 2.     Acquisition or Disposition of Assets.......................     3

Item 7.     Financial Statements and Exhibits..........................     3

SIGNATURES.............................................................     8
</TABLE>



                                     Page 2

<PAGE>


                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES




     ITEM 2. ACQUISITION OR DISPOSITION OF ASSETS

     On October 24, 1996, Tanknology Environmental, Inc. ("the Company"), a
Texas corporation, disposed of certain assets and liabilities, ("the Tank
Testing Group"), which consisted of the stock of the following wholly owned
subsidiaries, Tanknology Corporation International, including its cathodic
protection division d/b/a Tanknology Cathodic Protection, USTMAN Industries,
Inc., and Tanknology Canada (1988), Inc. to NDE Environmental Corporation
("NDE"), a Delaware corporation, an unrelated third party.

     The disposition of the Tank Testing Group was made pursuant to a Stock
Purchase Agreement (the "Agreement") between the Company and NDE dated October
7, 1996. The terms of the Agreement were determined by arm's length negotiation
between the Company and NDE.

     The Company disposed of the Tank Testing Group in consideration of the
receipt of $12,000,100 in cash. The agreement calls for adjustments to the
purchase price of up to $1,000,000 for working capital deficiencies and of up to
$1,250,00 for liabilities relating to services performed by the Tank Testing
Group prior to October 24, 1996. Such consideration was determined following
negotiation between the parties as to the value of the assets. The Company will
report a gain on this sale during the fourth quarter of 1996.


ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS

     (b)  Pro Forma Financial Information

          The following unaudited pro forma condensed consolidated financial
          statements set forth the results of operations for the year ended
          December 31, 1995, and the six months ended June 30, 1996, as if the
          disposition of the Tank Testing Group had occurred as of the beginning
          of the respective periods presented. The pro forma condensed
          consolidated balance sheet presented gives effect to the disposition
          as if it occurred on the balance sheet date, June 30, 1996.

          The pro forma information is based upon the historical financial
          statements of the Company and all material adjustments necessary to
          the historical financial statements to reflect the assumptions.

          The pro forma financial information is not necessarily indicative of
          the results that actually would have occurred had the sale been in
          effect on the dates and for the periods indicated or that may be
          obtained in the future. The pro forma financial information should be
          read in connection with the


                                     Page 3

<PAGE>


                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES



          Financial Statements included in Item 8 of the Company's Form 10-K for
          the fiscal year 1995 and in Item 1 of the Company's Form 10-Q for the
          quarter ended June 30, 1996.

     (c)  Exhibits

          Stock Purchase Agreement dated as of October 7, 1996, between the
          Company and NDE.

          Press Release dated October 25, 1996, announcing the completion by the
          Company of its disposition of subsidiaries.



                                     Page 4

<PAGE>


                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES

                         TANKNOLOGY ENVIRONMENTAL, INC.
            UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                               AS OF JUNE 30, 1996

<TABLE>
<CAPTION>

                                                                      June 30,       Pro Forma
                                                                        1996        Adjustments       Pro Forma
                                                                     ------------  -------------    -------------
<S>                                                                <C>            <C>               <C> 
                                     ASSETS
CURRENT ASSETS:
      Cash and cash equivalents....................................$  16,195,556  $  12,000,100 b   $ 28,195,656
      Short-term investments .......................................   1,989,917                       1,989,917
      Accounts receivable, net .....................................   4,602,376     (4,184,908)a        417,468
      Inventories, net .............................................     244,997       (206,911)a         38,086
      Current deferred tax asset ...................................     768,578       (638,075)c        130,503
      Income tax receivable ........................................   2,347,320     (1,428,444)c        918,876
      Other current assets .........................................     429,952       (252,458)a        177,494
                                                                     ------------  -------------    -------------

                    Total current assets ...........................  26,578,696      5,289,304       31,868,000

PROPERTY AND EQUIPMENT, NET ........................................   9,269,087     (4,265,305)a      5,003,782

INTANGIBLE ASSETS, LESS ACCUMULATED AMORTIZATION ...................   3,576,764       (978,694)a      2,598,070

DEFERRED TAX ASSET .................................................     647,926        450,519 c      1,098,445

NET ASSETS OF DISCONTINUED OPERATIONS AND
             OTHER ASSETS ..........................................   1,973,662       (222,566)a      1,751,096
                                                                     ------------  -------------    -------------
      Total assets.................................................$  42,046,135   $   (273,258)    $ 42,319,393
                                                                     ============  =============    =============


                  LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES:
      Accounts payable.............................................$     752,485   $   (703,100)a   $     49,385
      Accrued liabilities ..........................................   1,726,976     (1,649,783)a         77,193
                                                                     ------------  -------------    -------------
                    Total current liabilities ......................   2,479,461     (2,352,883)         126,578

DEFERRED INCOME ....................................................      10,080        (10,080)a              0
                                                                     ------------  -------------    -------------
                    Total liabilities ..............................   2,489,541     (2,362,963)         126,578

SHAREHOLDERS' EQUITY:

      Common stock, $.01 par value .................................     151,922                         151,922
      Additional paid-in capital ...................................  33,109,657                      33,109,657
      Retained earnings ............................................  10,482,686      2,636,221 c     13,118,907
      Treasury stock at cost .......................................  (4,187,671)                     (4,187,671)
                                                                     ------------  -------------    -------------
                    Total shareholders' equity .....................  39,556,594      2,636,221       42,192,815
                                                                     ------------  -------------     -------------


      Total liabilities and shareholders' equity...................$  42,046,135   $   (273,258)    $ 42,319,393
                                                                     ============  =============    =============

</TABLE>

     The  accompanying  notes are an integral part of the consolidated pro forma
financial statements.

                                     Page 5
<PAGE>


                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES
       UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS

<TABLE>



<CAPTION>
                                                  Twelve Months Ended December 31, 1995          Six Months Ended June 30, 1996
                                               ------------------------------------------- -----------------------------------------
                                                                Pro Forma                                  Pro Forma
                                               Consolidated    Adjustments    Pro Forma    Consolidated   Adjustments    Pro Forma
                                               ------------- --------------  ------------- ------------- -------------  ------------
<S>                                            <C>           <C>             <C>           <C>           <C>            <C>        
REVENUES...................................... $ 26,981,957  $ (24,607,321)e $  2,374,636  $ 11,838,405  $(10,733,682)d $ 1,104,723
COST OF SERVICES..............................   15,757,110    (14,440,611)e    1,316,499     7,423,007    (6,745,144)d     677,863
  Gross profit................................   11,224,847    (10,166,710)     1,058,137     4,415,398    (3,988,538)      426,860

SELLING, GENERAL & ADMINISTRATIVE
  EXPENSES....................................   10,426,733     (7,081,313)e    3,345,420     5,014,324    (3,266,318)d   1,748,006
  Income (loss) from operations...............      798,114     (3,085,397)    (2,287,283)     (598,926)     (722,220)   (1,321,146)

OTHER INCOME: ................................      728,859         12,495 e      741,354       482,131        23,625 d     505,756
   Income (loss) from continuing operations
     before income taxes......................    1,526,973     (3,072,902)    (1,545,929)     (116,795)     (698,595)     (815,390)

INCOME TAX PROVISION (BENEFIT)................      710,936     (1,333,599)e     (622,663)        4,484      (299,567)d    (295,083)
                                               ------------- --------------  ------------- ------------- -------------  ------------
   Income (loss) from continuing operations...      816,037     (1,739,303)      (923,266)     (121,279)     (399,028)     (520,307)
   Loss from discontinued operations,
     net of tax...............................   (9,405,142)            --     (9,405,142)          --            --            --
                                               ------------- --------------  ------------- ------------- -------------  ------------
   Net income (loss).......................... $ (8,589,105)  $ (1,739,303)  $(10,328,408) $   (121,279) $   (399,028)  $  (520,307)
                                               ============= ==============  ============= ============= =============  ============


Earnings (loss) per share from continuing 
   operation.................................. $       0.06   $      (0.12)  $      (0.06) $      (0.01) $      (0.03)  $     (0.04)

Loss per share from discontinued operations...        (0.66)           --           (0.66)           --             --         0.00

                                               ------------- --------------  ------------- ------------- -------------  ------------
NET EARNINGS (LOSS) PER SHARE................. $      (0.60)  $      (0.12)  $      (0.72) $      (0.01) $      (0.03)  $     (0.04)
                                               ============= ==============  ============= ============= =============  ============
WEIGHTED AVERAGE COMMON SHARES
     OUTSTANDING..............................   14,230,012     14,230,012     14,230,012    14,239,379    14,239,379    14,239,379
                                               ============= ==============  ============= ============= =============  ============
</TABLE>

     The accompanying  notes are an integral part of the consolidated  financial
statements.


                                     Page 6

<PAGE>


                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES

               NOTES TO UNAUDITED PRO FORMA FINANCIAL INFORMATION


<TABLE>
<S>  <C>

a    Adjustment to eliminate the assets and liabilities of the Tank Testing
         Group in the Company's consolidated balance sheet as of June 30, 1996,
         which were sold to NDE.
b    Adjustment to reflect proceeds from the sale of the Tank Testing Group
         to NDE.
c    Adjustment to reflect the effect of the sale of the Tank Testing Group
         on tax assets and liabilities. Tax expense of approximately $1,616,000
         is expected to result from the sale using an effective tax rate of 38%.
</TABLE>
<TABLE>
<S>       <C>                                              <C>

          Proceeds from sale ...........................   $12,000,100
          Net assets of the Tank Testing Group .........     7,747,879
                                                           -----------
          Estimated gain on sale before income taxes....     4,252,221
          Tax expense ..................................     1,616,000
                                                           -----------
          Estimated gain on sale .......................   $ 2,636,221
                                                           ===========
</TABLE>
<TABLE>
<S>  <C>
d    Adjustment to eliminate the Tank Testing Group for the six-month period
         ended June 30, 1996.

e    Adjustment to eliminate the Tank Testing Group for the twelve-month period
         ended December 31, 1995.



NOTE The unaudited proforma condensed consolidated statement of operations
         does not reflect anticipated reductions in selling, general &
         administrative expenses.
</TABLE>




                                     Page 7

<PAGE>


                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES


                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed by the undersigned,
thereunto duly authorized.





                                     TANKNOLOGY ENVIRONMENTAL, INC.


Date:    November 8, 1996        By  /s/ RICK BERRY

                                     Rick Berry
                                     Executive Vice President and
                                     Chief Financial Officer





                                     Page 8

<PAGE>


                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES


                                INDEX TO EXHIBITS
<TABLE>


<CAPTION>

                                                                Sequentially
 Exhibit                                                          Numbered
  Number                Exhibit                                     Page

- ---------  ---------------------------------------------------  ------------
<S>        <C>                                                  <C>    

    2      Stock Purchase Agreement between Tanknology
           Environmental, Inc. and NDE Environmental
           Corporation dated October 7, 1996.                       10

    28     Press Release dated October 25, 1996.                    75
</TABLE>




                                     Page 9

<PAGE>





                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES



                                    EXHIBIT 2

                            Stock Purchase Agreement



                                     Page 10

<PAGE>
<TABLE>

                                TABLE OF CONTENTS
<CAPTION>


                                                                                          Page

<S>     <C>           <C>      <C>  <C>                                                    <C>
ARTICLE I
        Definitions..........................................................................2

ARTICLE II
        Purchase and Sale....................................................................6
                      Section  2.1  The Sale.................................................6
                      Section  2.2  Purchase Price...........................................6
                      Section  2.3  Post Closing Adjustment..................................6
                      Section  2.4  Transactions Prior to Closing............................8

ARTICLE III
        Closing.............................................................................10

ARTICLE IV
        Representations and Warranties of Seller............................................10
                      Section  4.1  Organization and Good Standing of the Company...........10
                      Section  4.2  Corporate Records.......................................10
                      Section  4.3  Authorization...........................................11
                      Section  4.4  Non-Contravention.......................................11
                      Section  4.5  Validity................................................12
                      Section  4.6  Broker Involvement......................................12
                      Section  4.7  Litigation..............................................12
                      Section  4.8  Title to Shares.........................................12
                      Section  4.9  Continuity Prior to Closing Date........................13
                      Section  4.10 Contracts and Commitments...............................15
                      Section  4.11 Taxes...................................................15
                      Section  4.12 Title to Properties.....................................17
                      Section  4.13 Trademarks, Trade Names and Intellectual Property.......17
                      Section  4.14 Financial Records; Budget...............................18
                      Section  4.15 Condition of Assets and Inventory.......................18
                      Section  4.16 Liabilities.............................................19
                      Section  4.17 Employees and Related Matters...........................19
                      Section  4.18 No Material Change......................................20
                      Section  4.19 Compliance With Law.....................................20
                      Section  4.20 Tangible Personal Property..............................20
                      Section  4.21 Insurance...............................................21
                      Section  4.22 Government Licenses, Permits and Related Approvals......21
                      Section  4.23 Distributed Products....................................21
                      Section  4.24 Safety Reports..........................................21
                      Section  4.25 Transactions with Certain Persons.......................21
                      Section  4.26 Accounts Receivable.....................................22
                      Section  4.27 Studies, Etc............................................22

                                       -i-

<PAGE>



                      Section  4.28 Disclosure..............................................23
                      Section  4.29 Employee Benefits.......................................23
                      Section  4.30 Environmental Matters...................................26

ARTICLE V
        Representations and Warranties of Buyer.............................................28
                      Section  5.1  Corporate Status and Good Standing......................28
                      Section  5.2  Authorization...........................................28
                      Section  5.3  Non-Contravention.......................................28
                      Section  5.4  Validity................................................29
                      Section  5.5  Broker Involvement......................................29
                      Section  5.6  Litigation..............................................29
                      Section  5.7  Investment Intention....................................29
                      Section  5.8  Disclosure of Information...............................29
                      Section  5.9  Financial Condition.....................................30
                      Section  5.10 Restricted Securities...................................30

ARTICLE VI
        Additional Agreements and Covenants.................................................31
                      Section  6.1  Other Offers............................................31
                      Section  6.2  Conduct of the Business Pending the Closing.............31
                      Section  6.3  Public Announcements....................................34
                      Section  6.4  Further Assurances......................................34
                      Section  6.5  Covenant Against Competition............................35
                      Section  6.6  Governmental Filings....................................36
                      Section  6.7  Access to Information...................................36
                      Section  6.8  Use of Name.............................................36
                      Section  6.9  Other Action............................................37
                      Section  6.10 Employee Benefit Matters................................37
                      Section  6.11 Cooperation with Financings and Financial Reporting
                      ......................................................................37
                      Section  6.12 Consents................................................37
                      Section  6.13 Tax Certificate.........................................38
                      Section  6.14 Certain Tax Elections...................................38
                      Section  6.15 Liability for Taxes.....................................39
                      Section  6.16 Cooperation and Exchange of Information.................43
                      Section  6.17 Conflict................................................43
                      Section  6.18 Insurance...............................................44

ARTICLE VII
        Extent and Survival of Representations,
        Warranties, Covenants and Agreements; Indemnification...............................44
                      Section  7.1  Indemnification of Buyer................................44
                      Section  7.2  Survival; Threshold and Limits of Liability.............45
                      Section  7.3  Indemnification Procedures..............................46
                      Section  7.4  Arbitration of Disputes.................................49

                                      -ii-

<PAGE>



                      Section  7.5  General.................................................50
                      Section  7.6  Security................................................50

ARTICLE VIII Conditions to Closing..........................................................51
                      Section  8.1  Conditions Precedent to Obligations of Buyer............51
                      Section  8.2  Conditions Precedent to Obligations of the Seller.......52

ARTICLE IX
        Actions to be Taken at Closing......................................................53
                      Section  9.1  Actions to be Taken by Seller at the Closing............53
                      Section  9.2  Actions to be Taken by Buyer at the Closing.............54

ARTICLE X
        General Provisions..................................................................54
                      Section  10.1 Termination.............................................54
                      Section  10.2 Confidentiality; Publicity; Books and Records...........55
                      Section  10.3 Expenses................................................57
                      Section  10.4 Entire Agreement........................................57
                      Section  10.5 Waivers and Consents....................................58
                      Section  10.6 Notices.................................................58
                      Section  10.7 Successors and Assigns..................................58
                      Section  10.8 Performance.............................................59
                      Section  10.9 Choice of Law; Section Headings; Table of Contents......59
                      Section  10.10 Counterparts...........................................59
                      Section  10.11 Jurisdiction and Venue.................................59
                      Section  10.12 Severability...........................................59
                      Section  10.13 Assignment.............................................59

</TABLE>


                                      -iii-

<PAGE>



                            STOCK PURCHASE AGREEMENT

     This STOCK PURCHASE AGREEMENT (this "Agreement"), dated as of October 7,
1996, between NDE Environmental Corporation, a Delaware corporation ("Buyer"),
and Tanknology Environmental, Inc., a Texas corporation ("Seller"),

                              W I T N E S S E T H:

     WHEREAS, Seller owns all of the outstanding capital stock (the "Shares") of
(i) Tanknology Corporation International ("Tanknology") including its cathodic
protection division d/b/a Tanknology Cathodic Protection, a Delaware corporation
with its principal place of business at 5225 Hollister, Houston, Texas 77040,
(ii) USTMAN Industries, Inc. ("USTMAN"), a Delaware corporation with its
principal place of business at 12265 W. Bayaud Ave., Lakewood, CO 80225, and
(iii) Tanknology Canada (1988), Inc. ("Tanknology Canada"), a Canadian
corporation with its principal place of business at 2650 Meadowvale Blvd., Suite
12A, Mississauga, Ontario L5N 6M5 (each of Tanknology, USTMAN and Tanknology
Canada a "Subsidiary" and all three collectively the "Subsidiaries"); and

     WHEREAS, Buyer desires to acquire the Shares from Seller, and Seller
desires to sell the Shares to Buyer, upon the terms and subject to the
conditions hereinafter set forth;

     NOW, THEREFORE, in consideration of the premises and of the respective
representations, warranties, covenants, agreements and conditions contained
herein, the parties hereto hereby agree as follows:



                                       -1-

<PAGE>



                                    ARTICLE I
                                   Definitions

     The terms set forth below in this Article I shall have the meanings
ascribed to them below:

     Affiliate:  with respect to any person,  means any person that  directly or
indirectly  controls,  is  controlled  by or is under  common  control with such
person.

     Applicable Law: means any and all federal, national, state, regional,
local, municipal or foreign laws, statutes, rules, regulations, guidelines,
ordinances, licenses, Permits or judicial or administrative decisions of any
country, or any political subdivision, agency, commission, official or court
thereof having jurisdiction over the Seller or any Subsidiary.

     August 31 Financial Statements shall mean the Tanknology UST Group Combined
Balance Sheet, the Tanknology Corporation International Balance Sheet, the
Tanknology Canada Balance Sheet, the Cathodic Protection Balance Sheet and the
USTMAN Industries Balance Sheet, each dated as of August 31, 1996 and each
attached hereto in Schedule 4.14(A).

     best  efforts:  means a  party's  efforts  in  accordance  with  reasonable
commercial practice and without the incurrence of unreasonable expense.

     Business:  means  all  of  the  business  and  operations  conducted  by  a
Subsidiary, taken as a whole.

     Code: means the United States Internal Revenue Code of 1986, as amended, or
any amending or superseding Tax laws of the United States.

     Effective Date: means August 31, 1996.

     Environmental   Law:  means  any  applicable  law  (including  common  law)
regulating  or  prohibiting  Releases  into  any  part of the  workplace  or the
environment, or pertaining

                                       -2-

<PAGE>


to the protection or improvement of natural resources or wildlife, the
environment or public and employee health and safety including, without
limitation, the Comprehensive Environmental Response, Compensation, and
Liability Act ("CERCLA") (42 U.S.C. Section 9601 et seq.), the Hazardous
Materials Transportation Act (49 U.S.C. Section 1801 et seq.), the Resource
Conservation and Recovery Act (42 U.S.C. Section 6901 et seq.), the Clean Water
Act (33 U.S.C. Section 1251 et seq.), the Clean Air Act (42 U.S.C. Section 7401
et seq.), the Toxic Substances Control Act (15 U.S.C. Section 7401 et seq.), the
Atomic Energy Act of 1954 (42 U.S.C. Section 2014 et seq.), the Federal
Insecticide, Fungicide, and Rodenticide Act (7 U.S.C. Section 136 et seq.), the
Occupational Safety and Health Act (29 U.S.C. Section 651 et seq.) ("OSHA") and
the regulations promulgated pursuant thereto, and any such applicable state or
local statutes, and the regulations promulgated pursuant thereto, as such laws
have been and may be amended or supplemented.

     Excluded Assets: shall mean (a) all cash of the Subsidiaries reflected on
the August 31 Financial Statements, (b) the real property located at 5225
Hollister St., Houston, Texas 77040, (c) certain personal property belonging to
the Subsidiaries located at 5225 Hollister St., Houston, Texas 77040, and (d)
amounts owed to Subsidiaries by other Affiliates of the Seller, including the
accounts reflected under the item "Investment in Subsidiaries" on the August 31
Financial Statements.

     Forms 8023-A: means IRS Form 8023-A (including the required schedules
thereto) and any other form required to be filed with any jurisdiction so that
such jurisdiction will recognize the Section 338(h)(10) Election.

     Hazardous  Material:  means  any  substance,  material  or  waste  which is
regulated  pursuant  to any  Environmental  Law by any  public  or  governmental
authority in any jurisdiction in

                                       -3-

<PAGE>


which the Seller or any Subsidiary conducts business, or the United States,
including, without limitation, any material or substance which is defined as a
"hazardous waste," "hazardous material," "hazardous substance," "extremely
hazardous waste," "restricted hazardous waste," "contaminant," "toxic waste,"
"toxic substance," "source material," "special nuclear material," "byproduct
material," "high-level radioactive waste," "low-level radioactive waste" or
"spent nuclear material" under any provision of Environmental Law.

     IRS: means the United States Internal Revenue Service.

     Lien: means any lien, pledge, claim, charge, security interest, mortgage or
other  encumbrance,  option or other  rights of any third  person of any  nature
whatsoever.

     Permit: means any and all federal, national, state, regional, local,
municipal or foreign licenses, permits, variances, waivers, riders,
registrations or any other governmental authorizations or approvals necessary or
appropriate for any Subsidiary to conduct its Business.

     person: means any individual, firm, corporation, partnership, limited
liability company, joint venture, association, trust, unincorporated
organization, government or agency or subdivision thereof or any other entity.

     Paid  Reimbursable  Taxes:  shall  have the  meaning  set forth at  Section
6.15(e).

     Post-Closing Period: shall have the meaning set forth at Section 6.15(b).

     Pre-Closing Period: shall have the meaning set forth at Section 6.15(b).

     Regulation:  means a United States Department of Treasury regulation issued
with respect to the Code.

     Release: means any release, spill, effluent,  emission,  leaking,  pumping,
pouring, emptying, escaping, dumping, injection,  deposit, disposal,  discharge,
dispersal, leaching

                                       -4-

<PAGE>


or migration into the indoor or outdoor environment, or into or out of any
property currently or formerly owned, operated or leased by the Seller or any
Subsidiary.

     Remedial Action: means all actions, including, without limitation, any
capital expenditures, required by a governmental entity or required under any
Environmental Law, or voluntarily undertaken to (a) clean up, remove, treat, or
in any other way ameliorate or address any Hazardous Materials or other
substance in the indoor or outdoor environment; (b) prevent the Release or
threat of Release, or minimize the further Release of any Hazardous Material so
it does not endanger or threaten to endanger the public or employee health or
welfare of the indoor or outdoor environment; (c) perform pre-remedial studies
and investigations or post-remedial monitoring and care pertaining or relating
to a Release; or (d) bring the applicable party into compliance with any
Environmental Law.

     Section  338(h)(10)  Election:  shall have the meaning set forth at Section
6.14.

     Straddle Period: shall have the meaning set forth at Section 6.15(a).

     Taxes: means all United States federal, state, county and local, all
foreign and all other taxes, charges, fees, levies or other assessments,
including, without limitation, all net income, gross income, gross receipts,
sales, use, ad valorem, transfer, franchise, profits, profit share, license,
lease, service, service use, value added, withholding, payroll, employment,
excise, estimated, severance, stamp, occupation, premium, real and personal
property, windfall profits, gains, capital stock, production, business and
occupation, disability, custom duties or other taxes of any kind whatsoever,
together with any interest, penalties, additions to tax, fines or other
additional amounts imposed thereon or related thereto, and the term "Tax" means
any one of the foregoing Taxes.

     Tax Certificate: shall have the meaning set forth at Section 6.13.

                                       -5-

<PAGE>



     Tax  Returns:  means all  United  States  federal,  local and state and all
foreign  returns,   declarations,   reports,  estimates,   information  returns,
statements  and other  documents  of,  relating  to, or  required to be filed in
respect of, any and all Taxes.

                                   ARTICLE II

                                Purchase and Sale

     Section 2.1 The Sale. Upon the terms and subject to the conditions of this
Agreement, at the Closing, as defined below under Article III, Seller will sell,
assign, transfer and deliver to Buyer, the Shares (together with a stock power
or powers executed in blank), and Buyer will purchase and acquire the Shares.

     Section 2.2 Purchase Price. The purchase price for all the Shares (the
"Purchase Price") shall be $12,000,000. The Purchase Price shall be subject to
adjustment pursuant to Section 2.3 only. The Purchase Price shall be paid at
Closing by wire transfer of $12,000,000 in immediately available funds to an
account or accounts designated in writing by Seller at least two business days
prior to the Closing.

     Section  2.3 Post Closing Adjustment.

     (a) Within 90 calendar days following the Closing, Buyer shall prepare and
deliver to Seller a combined balance sheet (the "Balance Sheet") of the
Subsidiaries as of the Closing Date, as defined below under Article III (prior
to the effects of the transactions occurring at the Closing) and a statement
(the "Statement"), reflecting the calculation of the adjustment, if any, to the
Purchase Price pursuant to Section 2.3(b). The Balance Sheet shall be prepared
in accordance with generally accepted accounting principles ("GAAP")
consistently applied in the United States and the financial reporting policies
and procedures utilized by Seller prior to the Closing. Seller shall have a
period of 30 calendar days after

                                       -6-

<PAGE>


delivery of the Balance Sheet and the Statement to review such documents and
make any objections it may have in writing to Buyer. If written objections are
delivered to Buyer by Seller within such 30-day period, then Buyer and Seller
shall attempt to resolve the matter or matters in dispute. If no written
objections are made by Seller within such 30-day period, then the Balance Sheet
and the Statement shall be final and binding on the parties hereto. If disputes
with respect to the Balance Sheet or the Statement cannot be resolved by Buyer
and Seller within 30 calendar days after the delivery of the objections thereto,
then, at the request of Buyer or Seller, the specific matters in dispute shall
be submitted to Arthur Andersen & Co. (the "Auditors") or such other independent
accounting firm as may be approved by Seller and Buyer, which firm shall render
its opinion as to such matters. Based on such opinion, such independent
accounting firm will then send to Seller and Buyer its determination of the
specified matters in dispute, which determination shall be final and binding on
the parties hereto. The fees and expenses of the Auditors shall be borne
one-half by Seller and one-half by Buyer.

     (b) The Purchase Price shall be adjusted (i) upward for the implied
interest on $12,000,000 for the period August 31, 1996 through the Closing Date
at an annual rate of 8%, (ii) downward for any withdrawals of current assets by
the Seller or an Affiliate or the incurrence of any liabilities on behalf of or
to the Seller or an Affiliate other than the transactions provided for in
Section 2.4, and (iii) downward for (A) a decrease in value of total non-current
assets, adjusted for noncurrent Excluded Assets and normal depreciation and
amortization, unless such decrease in non-current assets is covered by insurance
proceeds of comparable amount and (B) an increase in any liability or in the
total liabilities, all as reflected in the August 31 Financial Statements except
any such increase offset by a

                                       -7-

<PAGE>


comparable increase in assets, except any decrease or increase contemplated in
this Section 2.3(b)(iii) due to operations in the normal course of business. If
the aggregate Adjustment is upward, then within five days following the final
determination thereof, Buyer shall pay Seller by wire transfer in immediately
available funds to the account or accounts designated by Seller the amount by
which the Purchase Price is adjusted upward. If the aggregate adjustment is
downward, then within five days following the final determination thereof,
Seller shall pay Buyer by wire transfer in immediately available funds to the
account or accounts designated by Buyer the amount by which the Purchase Price
is adjusted downward.

     Section 2.4 Transactions Prior to Closing.

     (a) Prior to the Closing, the deeds covering the real property located at
5225 Hollister St., Houston, Texas 77040, and certain personal property located
at 5225 Hollister St., Houston, Texas 77040, shall be assigned by Tanknology to
the Seller.

     (b) At or prior to Closing, cash of the Subsidiaries in the amount of
$793,000 as reflected on the August 31 Financial Statements shall be withdrawn
by the Seller.

     (c) Prior to Closing, the Seller shall eliminate or cause its Affiliates to
eliminate all intercompany account balances, including the accounts reflected on
each of the August 31 Financial Statements under the item "Investment in
Subsidiaries."

     (d) At or prior to Closing, Seller shall execute assumption agreements
reasonably acceptable to Buyer assuming from the Subsidiaries (i) any and all
income Taxes for the period through the Closing Date, (ii) any and all claims,
losses or liabilities arising from or relating to the real property and
improvements and certain personal property located at 5225 Hollister St.,
Houston, Texas 77040 and the adjacent lot owned by Seller, (iii) any

                                       -8-

<PAGE>


obligation of the  Subsidiaries  relating to T. G. Bogle under that certain
consulting  agreement  between T. G. Bogle,  Seller and  Tanknology  dated as of
December,  1991,  and (iv) any  obligation of the  Subsidiaries  relating to the
employees listed on Schedule 2.4(d)(iv).

                                       -9-

<PAGE>




                                   ARTICLE III

                                     Closing

     The closing of the transactions contemplated hereby (the "Closing") shall
take place at such time and at such date as are mutually agreed to by Buyer and
Seller at the offices of Baker & Botts, L.L.P., Houston, Texas, but in no event
later than October 15, 1996. The date on which the Closing is held is referred
to in this Agreement as the "Closing Date."

                                   ARTICLE IV

     Representations and Warranties of Seller

     The Seller represents and warrants to Buyer the following:

     Section 4.1 Organization and Good Standing of the Company. Each of the
Seller and its Subsidiaries is a corporation duly organized, validly existing
and in good standing under the laws of the jurisdiction of its incorporation and
has full corporate power and authority to own, operate and lease its assets in
the manner currently owned, operated and leased by it and to carry on its
business as now conducted. The Seller and each Subsidiary is duly qualified to
do business as a foreign corporation in all jurisdictions in which the nature of
its business requires such qualification and where the failure to do so would
have a material adverse effect on the Seller or such Subsidiary. Schedule 4.1 is
a complete list of all jurisdictions in which each Subsidiary is currently
licensed or qualified to transact business as a foreign entity.

     Section 4.2 Corporate Records. Copies of the certificate of incorporation
and by-laws of the Seller and each Subsidiary have been delivered to Buyer and
are complete and correct as of the date hereof. The minute book and stock book
of Seller and each Subsidiary have been exhibited to Buyer and each is a
complete and accurate record of the material corporate actions

                                      -10-

<PAGE>


of the stockholders and directors (and any committees thereof) of the
corporation through the date hereof and all issuances, cancellations and
transfers of the capital stock thereof.

     Section 4.3 Authorization. Each of the Seller and the Subsidiaries has full
corporate power and authority under its certificate or articles of incorporation
and by-laws, and all necessary corporate action has been taken to authorize it,
to execute and deliver this Agreement and the exhibits and schedules hereto, to
consummate the transactions contemplated herein and to take all actions required
to be taken by it pursuant to the provisions hereof, and each of this Agreement
and the exhibits hereto constitutes the valid and binding obligation of the
Seller and each Subsidiary enforceable against the Seller and each Subsidiary,
as the case may be, in accordance with its terms, except as such enforcement may
be subject to bankruptcy, insolvency, reorganization, moratorium or other
similar laws now or hereafter in effect relating to creditors' rights and
general principles of equity.

     Section 4.4 Non-Contravention. Except as set forth in Schedule 4.4, neither
the execution and delivery of this Agreement or any documents executed in
connection herewith, nor the consummation of the transactions contemplated
herein or therein, does or will violate, conflict with, result in breach of or
require notice or consent under any Applicable Law, the charter or by-laws of
the Seller or any Subsidiary or any provision of any agreement or instrument to
which the Seller or any Subsidiary is a party or result in the creation of any
Lien upon the capital stock, properties or assets of any Subsidiary. Except as
set forth in Schedule 4.4, no consent, approval, exemption, authorization or
other action of, or notice to or filing with, any third party, court or
administrative or other governmental or regulatory body is required by Seller or
any Subsidiary to execute, deliver or perform this Agreement and to consummate
the transactions

                                      -11-

<PAGE>


contemplated  herein  and to take all  actions  required  to be taken by it
pursuant to the provisions hereof.

     Section 4.5 Validity. There are no pending or threatened judicial or
administration actions, proceedings or investigations which question the
validity of this Agreement or any action taken or contemplated by the Seller in
connection with this Agreement.

     Section 4.6 Broker Involvement. Neither the Seller nor any Subsidiary
thereof has hired, retained or dealt with any broker or finder in connection
with the transactions contemplated by this Agreement other than Raymond James &
Associates.

     Section 4.7 Litigation. Except as set forth in Schedule 4.7, there is no
investigation, claim or proceeding or litigation of any type pending or
threatened involving the Seller or any Subsidiary or that would have an adverse
effect on the Seller or any Subsidiary or Buyer, and Seller is unaware after
reasonable investigation of any judgment, order, writ, injunction or decree of
any court, government or governmental agency, or arbitral tribunal against or
involving Seller or any Subsidiary or that would have an adverse effect on
Seller or any Subsidiary or Buyer.

     Section 4.8 Title to Shares. The capitalization of the Subsidiaries is set
forth in Schedule 4.8 hereto. All of the outstanding Shares were duly authorized
for issuance and are validly issued, fully paid and nonassessable and none of
such Shares are held in treasury. Seller owns beneficially and of record the
Shares, free and clear of all Liens, and such Shares are not subject to any
agreements or understandings with respect to the voting or transfer of any of
the Shares. There are no outstanding subscriptions, options, convertible
securities, warrants or calls of any kind issued or granted by, or binding upon,
the Seller to purchase or otherwise acquire or to sell or otherwise dispose of
any security of or equity interest in any Subsidiary. The Seller has the
requisite legal right to sell, assign and transfer the Shares owned by it to
Buyer and will, upon

                                      -12-

<PAGE>


delivery of a certificate or certificates representing such Shares to Buyer
pursuant to the terms hereof, transfer to Buyer title to such Shares, free and
clear of any Liens.

     Section 4.9 Continuity Prior to Closing Date. Except as set forth in
Schedule 4.9, from August 31, 1996 to and including the Closing Date, the
Subsidiaries have not conducted their respective businesses otherwise than in
the usual and customary manner and in the ordinary course of business,
consistent with their historical practice, and there has not been:

     (a) any sale, lease, distribution, transfer, mortgage, pledge or subjection
to Lien of assets of a Subsidiary, except sales or purchases of inventory and
obsolete or surplus equipment in the ordinary and usual course of business;

     (b) any  material  transaction  by any  Subsidiary  not in the ordinary and
usual course of business;

     (c)  any  material  damage,  destruction  or  loss  to  the  assets  of any
Subsidiary whether or not covered by insurance;

     (d) a termination, or a threatened termination, or material modification,
in each case not in the ordinary course of business, of any material contract or
the relationship of any Subsidiary with any customer or supplier, who in the
aggregate accounted for in excess of $50,000 of gross sales or purchases during
the Subsidiary's last two full fiscal years unless such contract or relationship
is lost to Buyer;

     (e) any change in accounting methods or principles or the application
thereof, any change in policies or practices with respect to items affecting
working capital or any material change by the Seller and any of the Subsidiaries
in tax methods or principles or the application thereof;

                                      -13-

<PAGE>




     (f) any delay or reduction in capital expenditures in contemplation of this
Agreement or otherwise, or any failure to continue to make capital expenditures
in the ordinary course of business consistent with past practice by Seller or a
Subsidiary;

     (g) any acceleration of sales or orders or other similar action in
contemplation of this Agreement or otherwise not in the ordinary course of
business consistent with past practice;

     (h) any bonus payments, salary increases, commission increases or
modifications, the execution of any employment agreement, severance arrangement,
consulting arrangement, sales agency agreement, representation agreement or
distribution agreement or similar document or agreement, or other changes in
employee benefits or other compensation affecting any employee, officer,
director, representative or agent of any Subsidiary;

     (i) any waiver of any rights that, singly or in the aggregate, are material
to any  Subsidiary  or the  financial  condition  or results of operation of any
Subsidiary;

     (j) any issuance by any of the  Subsidiaries of any shares of capital stock
or any  repurchase  or redemption  by any of the  Subsidiaries  of any shares of
capital stock;

     (k) any transaction between Seller or any Affiliate other than a Subsidiary
on the one hand and any of the Subsidiaries on the other hand;

     (l)  any   declaration  or  payment  of  any  dividend  on,  or  any  other
distribution  with respect to, the equity securities of any of the Subsidiaries;
or

     (m) any  contract  or  commitment  to do or  cause  to be  done  any of the
foregoing.

                                      -14-

<PAGE>



     Section 4.10 Contracts and Commitments Schedule 4.10 lists all agreements,
leases, commitments, contracts, undertakings or understandings, oral or written,
to which any of the Subsidiaries is a party as of the date of execution of this
Agreement, including but not limited to trademark, trade name or patent license
agreements, service agreements, lease, purchase or sale agreements, supply
agreements, distribution or distributor agreements, purchase orders, customer
orders and equipment rental agreements, that are either material to any of the
Subsidiaries or involve consideration with a value of $50,000 or more. No
Subsidiary is in breach of or default under any agreement, lease, contract or
commitment listed or of a type required to be listed (without regard to the date
thereof) in Schedule 4.10 (collectively, the "Agreements"). Each Agreement is a
valid, binding and enforceable agreement of a Subsidiary and, to the knowledge
of Seller after reasonable investigation, the other parties thereto, enforceable
except as such enforcement may be subject to bankruptcy, insolvency,
reorganization, moratorium or other similar laws now or hereafter in effect
relating to creditors' rights and general principles of equity. There has not
occurred any breach or default under any Agreement on the part of the other
parties thereto, and no event has occurred which with the giving of notice or
the lapse of time, or both, would constitute a default under any Agreement.
There is no dispute between the parties to any Agreement as to the
interpretation thereof or as to whether any party is in breach or default
thereunder, and no party to any Agreement has indicated its intention to, or
suggested it may evaluate whether to, terminate any Agreement. No Subsidiary is
a party to any covenant or obligation of any nature limiting the freedom of any
Subsidiary to compete in any line of business after the Closing. No notice has
been given under any lease to extend the term hereof beyond its current term.

                    Section  4.11   Taxes.

                                      -15-

<PAGE>



     (a) Each of the Seller, its Subsidiaries and any affiliated, combined or
unitary group of which any such corporation is or was a member has (i) timely
(taking into account any extensions) filed all Tax Returns required to be filed
or sent by or with respect to it in respect of any Taxes, (ii) timely paid all
Taxes (including estimated Taxes) that are due and payable for which the Seller
or any of its Subsidiaries may be liable, (iii) established reserves that are
adequate for the payment of all Taxes not yet due and payable with respect to
the results of operations of the Seller and its Subsidiaries through the Closing
Date and (iv) complied in all respects with all applicable laws, rules and
regulations relating to the payment and withholding of Taxes and has in all
respects timely withheld from employee wages and paid over to the proper taxing
and other governmental authorities all amounts required to be so withheld and
paid over, based on the manner in which Seller and the Subsidiaries have
classified their employees under the Fair Labor Standards Act and Department of
Transportation regulations.

     (b) Schedule 4.11 sets forth (i) the last period through which all Tax
Returns of the Seller and any of its Subsidiaries have been examined by the IRS,
Revenue Canada, or any other taxing authority or otherwise closed and (ii) any
affiliated, consolidated, combined, unitary or similar group Tax Return in which
the Seller is or has been a member or is or has joined in the filing. Except to
the extent being contested in good faith, all deficiencies asserted as a result
of such examinations have been paid, fully settled or adequately provided for in
accordance with generally accepted accounting principles consistently applied in
the United States as reflected in the Seller's most recent audited financial
statements. No Tax audits or other administrative proceedings or court
proceedings are presently pending with regard to any Taxes for which the Seller
or any of its Subsidiaries

                                      -16-

<PAGE>


would be liable, and no deficiency for any such Taxes has been proposed,
asserted or assessed pursuant to such examination against the Seller or any of
its Subsidiaries by any taxing authority with respect to any period.

     (c) Neither the Seller nor any of its Subsidiaries has executed or entered
into with the IRS, Revenue Canada, or any other taxing authority (i) any
agreement or other document extending or having the effect of extending the
period for assessments or collection of any Tax for which the Seller or any of
its Subsidiaries would be liable or (ii) a closing agreement pursuant to Section
7121 of the Code that relates to the assets or operations of the Seller or any
of its Subsidiaries other than the items noted on Schedule 4.11. There are no
Tax liens upon any assets of the Seller or any of its Subsidiaries.

     (d) Neither the Seller nor any of its Subsidiaries has made an election
under Section 341(f) of the Code or agreed to have Section 341(f)(2) of the Code
apply to any disposition of a subsection (f) asset (as such term is defined in
Section 341(f)(4) of the Code) owned by the Seller or any of its Subsidiaries.

     (e) Neither the Seller nor any of its Subsidiaries is a party to, is bound
by or has any obligation under any Tax sharing agreement or similar agreement or
arrangement.

     Section 4.12 Title to Properties. Except as set forth in Schedule 4.12
hereto, each Subsidiary has good and indefeasible title to all of its assets,
free and clear of all Liens.

     Section 4.13 Trademarks, Trade Names and Intellectual Property. Schedule
4.13 contains an accurate and complete list of (a) all patents, pending patent
applications and invention memoranda owned by any Subsidiary or relating to the
Business of any of them, (b) all registered United States and foreign
trademarks, trade names and logos owned or used by any Subsidiary, and all
registrations thereof, and all unregistered United States and foreign
trademarks,

                                      -17-

<PAGE>


trade names and logos used by any Subsidiary. Such Subsidiary has the right to
use all trademarks, trade names, logos, patents, pending patent applications and
invention memoranda referred to herein. Except as expressly set forth in
Schedule 4.7 hereto, there is no pending or threatened action or claim that
would impair any such right. Except as set forth in Schedule 4.13 hereto, any or
all Subsidiaries are the sole and exclusive owners of, with all right, title and
interest in and to, each item described in Schedule 4.13 and have sole and
exclusive rights to the use thereof or the material covered thereby.

     Section 4.14 Financial Records; Budget. The audited consolidated financial
statements of the Seller and its Subsidiaries as of and for the years ended
December 31, 1993, 1994, 1995, the unaudited consolidated financial statements
for the quarters ended March 31, 1996 and June 30, 1996, and the unaudited
consolidating financial statements of the Subsidiaries as of and for the years
ended December 31, 1993, 1994 and 1995 previously delivered to Buyer
(collectively, the "Financial Statements"), are each accurate, complete, true
and correct in all material respects, were prepared in accordance with GAAP
consistently applied in the United States (except as set forth therein), and
fairly present in all material respects the financial condition and results of
operations of the Seller and its Subsidiaries. The August 31 Financial
Statements, previously delivered to Buyer, are each accurate, complete, true and
correct, were prepared in accordance with GAAP consistently applied in the
United States (except as set forth therein), and fairly present the financial
condition and results of operations of the Subsidiaries. Schedule 4.14(B)
reflects all intercompany transactions between any Subsidiary and the Seller or
any Affiliates of Seller for the period from August 31, 1996 through the Closing
Date.

     Section 4.15 Condition of Assets and Inventory. All the assets of each
Subsidiary are in good, serviceable condition and fit for the particular
purposes for which they are

                                      -18-

<PAGE>


used in the business of the owner thereof, subject only to normal maintenance
requirements and normal wear and tear reasonably expected in the ordinary course
of business. All items of inventory of each Subsidiary are merchantable or (in
the case of raw materials, supplies and work in process) suitable and useable
for the production or completion of merchantable products, for sale in the
ordinary course of business as first quality goods at mark-ups consistent with
past practice, none of such items is below standard quality, obsolete or
obsolescent, and each item is reflected in the Financial Statements and the
August 31 Financial Statements on the basis of a physical count and is valued at
the lower of cost or market in accordance with GAAP consistently applied in the
United States (including any required reduction for impaired value or
slow-moving inventory). Such inventory includes a sufficient but not an excess
quantity of each type of such inventory to meet the normal requirements of the
Subsidiaries.

     Section 4.16 Liabilities. Except as set forth in Schedule 4.16 or in the
financial statements and notes thereto referred to in Section 4.14, there is no
existing, contingent or, to Seller's knowledge after reasonable investigation,
threatened liability, obligation, lien or claim of any nature (absolute,
accrued, contingent or otherwise) that relates to or has been or may be asserted
against any Subsidiary.

     Section 4.17 Employees and Related Matters. (a) Seller has heretofore
delivered a complete list of all employees of each Subsidiary, listing the title
or position held, base salary, any commissions or other compensation paid or
payable in 1996 as reflected on such Schedule, all employee benefits received by
such employees and any other terms of any oral or written agreement between any
such employee and the Seller, any Subsidiary or any Affiliate thereof. The
Seller has heretofore delivered to the Buyer true and correct copies of each
management or employment contract or contract for personal services and a
complete

                                      -19-

<PAGE>


description of any other understanding or commitment between any Subsidiary (or
the Seller on behalf of any Subsidiary) and any officer, consultant, director,
employee, independent contractor or other person or entity.

     (b) The Seller is not a party to any  collective  bargaining  agreement  or
labor contract.

     (c) The Seller has taken all necessary actions to comply with the Worker
Adjustment and Retraining Notification Act (the "WARN Act") through the Closing
Date, to the extent it is subject to such act, and the Buyer shall not have any
disclosure or announcement obligations under the WARN Act as a result of the
transaction contemplated by this Agreement.

     Section 4.18 No Material Change. There has been no material adverse change
in the business, results of operations, assets or financial position of any
Subsidiary from August 31, 1996 to and including the Closing Date, and no event
has occurred which could be expected to lead to or cause such a material adverse
change.

     Section 4.19 Compliance With Law. No Subsidiary is in violation of any
provision of Applicable Law, including any Environmental Law, and no Subsidiary
has received any notice of any alleged violation of such Applicable Law.

     Section 4.20 Tangible Personal Property. Except for the Excluded Assets,
all of the fixtures, machinery and equipment reflected in the August 31
Financial Statements and/or used in connection with the Business of a Subsidiary
are in the possession and under the operating control of such Subsidiary
("Tangible Personal Property"). Except as set forth in Schedule 4.20 hereto, no
item of Tangible Personal Property requires repairs in excess of $2,500 to be in
good, serviceable condition and fit for the particular purpose for which it is
currently used, subject only

                                      -20-

<PAGE>


to normal maintenance requirements and normal wear and tear reasonably expected
in the ordinary course of business.

     Section 4.21 Insurance. Schedule 4.21 contains a list of all insurance
policies of the Seller or any Subsidiary or relating to the conduct of the
Business and the status of prepayments. The Seller has heretofore delivered to
Buyer a copy of all such policies. Such policies are in full force and effect,
and the Seller and the Subsidiaries are not in default under any of them.

     Section 4.22 Government Licenses, Permits and Related Approvals. Seller has
heretofore provided to Buyer a list of all Permits required for the conduct of
Business by the Subsidiaries, all of which are in full force and effect and are
not being violated.

     Section 4.23 Distributed Products. Schedule 4.23 sets forth a complete
listing of all products (a) distributed by any Subsidiary (and the manufacturer
thereof and the person, if different, for whom such Subsidiary distributes such
product) or (b) manufactured or sold by any Subsidiary and distributed by others
(and the name of such distributor). Such Schedule also sets forth the terms of
each such distribution arrangement. Each Subsidiary has full right to distribute
all products referred to in clause (a) of this Section.

     Section 4.24 Safety Reports. Seller has heretofore provided to Buyer a
complete listing of all insurance loss runs, worker's compensation reports and
claims, safety citations and reports, OSHA reports and all documents relating to
any of the foregoing since July 1, 1993.

     Section 4.25 Transactions with Certain Persons. Except as set forth in
Schedule 4.25, during the past three years no Subsidiary has, directly or
indirectly, purchased, leased or otherwise acquired any property or obtained any
services from, or sold, leased or otherwise disposed of any property or
furnished any services to, or otherwise dealt with (except with respect to
remuneration for services rendered as a director, officer or employee of any
Subsidiary), in the

                                      -21-

<PAGE>


ordinary course of business or otherwise, with a value of or in a transaction or
series of transactions with a value of $60,000 or more, (a) any officer,
director or shareholder of the Seller or any Affiliate thereof other than a
Subsidiary or (b) any person, firm or corporation which, directly or indirectly,
alone or together with others, controls, is controlled by or is under common
control with the Seller or any shareholder thereof. No Subsidiary owes any
amount to, or has any contract with or commitment to, any of its shareholders,
directors, officers, employees or consultants (other than compensation for
current services not yet due and payable and reimbursement of expenses arising
in the ordinary course of business not in excess of $1,000 in the aggregate),
and none of such persons owes any amount to any Subsidiary.

     Section 4.26 Accounts Receivable. All the accounts receivable of the
Subsidiaries are valid, genuine and subsisting, arise out of bona fide sales and
deliveries of goods, performance of services or other business transactions in
the ordinary course of business, are owned free and clear and not subject to any
Lien, and are current and collectible net of any reserves shown on the August 31
Financial Statements (which reserves are adequate and were calculated consistent
with past practice).

     Section 4.27 Studies, Etc. Seller has heretofore provided to Buyer a
complete list of all studies, reports, plans, analyses or similar documents of a
material nature (whether prepared by employees of the Seller or any Subsidiary
or others) in the possession or control of the Seller or any Subsidiary thereof
relating to safety, the environment, Hazardous Material, intellectual property,
markets, competitors, strategic planning, product liability, warranties or
otherwise relating in any way to a Subsidiary, excluding any reports prepared by
Raymond James & Associates.

                                      -22-

<PAGE>




     Section 4.28 Disclosure. All schedules to this Agreement are complete and
accurate or will be on the Closing Date. No representation or warranty by Seller
in this Agreement or in any schedule or exhibit to this Agreement, or in any
statement or certificate or other document furnished to Buyer by Seller or any
representative of Seller, contains or will contain any untrue statement of a
material fact or omits or will omit a material fact necessary to make the
statements therein not misleading. The information concerning the Seller in
Seller's filings, reports and submissions under the Securities Exchange Act of
1934, as amended (the "Exchange Act"), does not contain any untrue statement of
a material fact or omit a material fact necessary to make the statements therein
not misleading. Seller's disclosure on any schedule to this Agreement shall not
affect Buyer's right to indemnification under Article VII hereunder in any way.

                    Section 4.29 Employee Benefits.

     (a) For purposes of Section 4.29, all references to the Seller shall be
deemed to refer to the Seller, any Subsidiary and any trade or business, whether
or not incorporated, that together with the Seller or any Subsidiary would be
deemed or treated as a "single employer" within the meaning of Section 4001 of
the Employee Retirement Income Security Act of 1974, as amended ("ERISA") or
Code Section 414.

     The term "Seller Plan" shall mean any stock purchase, stock option,
pension, profit-sharing, retirement, bonus, deferred compensation, incentive
compensation, commission, severance or termination pay, hospitalization,
medical, dental, disability, life or other insurance, or supplemental
unemployment benefits plan or agreement or policy or contract or other
arrangement that is or ever has been maintained or contributed to by the Seller
for the purpose of providing employment-related compensation or benefits to any
current or former officer, consultant, director, annuitant, employee, retiree or
independent

                                      -23-

<PAGE>


contractor of the Seller or members of their respective families (other than
directors' and officers' liability policies), whether or not insured, including
without limitation "employee benefit plans" as defined in ERISA and the rules
and regulations thereunder.

     The term "Subsidiary Plan" shall mean any Seller Plan that formerly
provided, provides or is intended to provide compensation or benefits to any
person or member of a person's family as a consequence of that person's current
or former relationship to a Subsidiary.

     (b) As of the Closing Date, no Seller Plan is or has been (i) covered by
Title IV of ERISA, (ii) subject to the minimum funding requirements of Section
412 of the Code, (iii) a "multi-employer plan" as defined in Section 3(37) of
ERISA, (iv) subject to Section 4063 or 4064 of ERISA, or (v) a voluntary
employees' beneficiary association within the meaning of Code Section 501(c)(9).

     (c) A list of each Subsidiary Plan is listed on Schedule 4.29. The Seller
has no commitment or obligation to establish or adopt any new or additional
plans or other arrangements that would constitute Subsidiary Plans if adopted,
or to increase materially the benefits under any existing Subsidiary Plan. The
Seller has heretofore delivered to the Buyer true and correct copies of the
following:

          (i) each written  Subsidiary Plan and all amendments thereto as of the
     date hereof;

          (ii) a complete written description of each other Subsidiary Plan;

          (iii) all current summary plan descriptions provided to employees
     regarding the Subsidiary Plans;

                                      -24-

<PAGE>




     (iv) each trust agreement and annuity contract (or any other funding
instruments), and each insurance contract, pertaining to any of the Subsidiary
Plans, including all amendments to such documents to the date hereof;

     (v) the most recent IRS  Form 5500 for each  Subsidiary  Plan and schedules
thereto; and

     (vi) the most recent determination letter issued by the IRS with respect to
any Subsidiary Plan qualified under Section 401(a) of the Code.

     (d) Each Subsidiary Plan is in compliance with the provisions of all
applicable laws, rules and regulations, including, without limitation, ERISA and
the Code. No person has engaged in any prohibited transaction (within the
meaning of Section 4975 of the Code or Section 406 of ERISA) that could subject
any Subsidiary to a liability.

     (e) All contributions and premiums required of any Subsidiary (or of the
Seller on behalf of any Subsidiary) by any legal requirement or by the terms of
any Seller Plan or any contract relating thereto have been timely made (without
regard to any waivers granted with respect thereto) or accrued. All obligations
of all Subsidiaries (and of the Seller on behalf of any Subsidiary) with respect
to each Seller Plan have been paid or performed.

     (f) Except as provided in Schedule 4.29, neither the Seller nor any
Subsidiary Plan provides for medical, life insurance or health benefits or death
benefits after an employee's termination of employment (including retirement)
except for continuation coverage required pursuant to Section 4980B of the Code
and Part 6 of Title I of ERISA and the regulations thereunder.

     (g) The Subsidiaries  have no obligation to make any payments that would be
"excess parachute  payments" under Section 280G of the Code. The consummation of
the

                                      -25-

<PAGE>


transactions contemplated by this Agreement will not (A) entitle any current or
former employee of any Subsidiary to severance pay, employment compensation or
any other payment, benefit or award (whether under a Subsidiary Plan or
otherwise) or (B) accelerate the time of payment or vesting, or increase the
amount of any benefit, award (including stock options, restricted stock and
similar awards) or compensation due any such employee or former employee.

     (h) There are no pending, threatened or anticipated claims or proceedings
against any Subsidiary Plan, the assets of any Subsidiary Plan or any
Subsidiary, or the plan administrator or fiduciary of any Subsidiary Plan with
respect to the operation of any such plan (other than routine, uncontested
benefit claims), and there are no facts or circumstances that could form the
basis for any such claim or proceeding.

                    Section 4.30 Environmental Matters.

     (a) The operations of the Seller and its Subsidiaries have been and, as of
the Closing Date, will be, in compliance with all Environmental Laws;

     (b) The Seller and its Subsidiaries have obtained and will, as of the
Closing Date, maintain all Permits and have made and will, as of the Closing
Date, make all filings, reports and notices required under applicable
Environmental Law in connection with the operations of their respective
businesses;

     (c) As of the date hereof, the Seller and its Subsidiaries are not subject
to any outstanding written orders, contracts or agreements with any governmental
entity or other person respecting (i) Environmental Laws, (ii) Remedial Action,
(iii) any Release or threatened Release of a Hazardous Material, or (iv) an
assumption of responsibility for environmental claims of another entity;

                                      -26-

<PAGE>




     (d) The Seller and its Subsidiaries have not received any written
communication alleging, with respect to any such party, the violation of or
liability under any Environmental Law or requesting, with respect to any such
party, information with respect to an investigation pursuant to CERCLA or any
other Environmental Law;

     (e) Neither the Seller nor any of its Subsidiaries has any contingent
liability in connection with the Release of any Hazardous Material into the
indoor or outdoor environment (whether on-site or off-site) or employee or
third-party exposure to Hazardous Materials;

     (f) The operations of the Seller or its Subsidiaries involving the
generation, transportation, treatment, storage or disposal of hazardous waste,
as defined and regulated under 40 C.F.R. parts 260-270 or any state equivalent,
are in compliance with applicable Environmental Laws;

     (g) Except as described on Schedule 4.30, there is not now, nor, to the
best knowledge of the Seller as of the date hereof, or has there ever been, on
or in any property owned, operated, leased or under option by, the Seller or any
Subsidiary or for which the Seller or any Subsidiary has assumed responsibility
for environmental claims, any of the following: (i) any underground storage
tanks or surface impoundments, (ii) any on-site disposal of solid waste or
Hazardous Materials, (iii) any asbestos-containing materials, or (iv) any
polychlorinated biphenyls; and

     (h) Buyer shall have the right to conduct such inspections and
investigations of the properties of any Subsidiary as Buyer deems necessary or
desirable, including, without limitation, the right to conduct sampling of
surface water, groundwater, soil, indoor and outdoor air quality, and building
materials.

                                      -27-

<PAGE>




                                    ARTICLE V

                     Representations and Warranties of Buyer

             Buyer represents and warrants to Seller the following:

     Section 5.1 Corporate Status and Good Standing. Buyer is a corporation duly
organized, validly existing and in good standing under the laws of Delaware,
with full corporate power and authority under its certificate of incorporation
and by-laws to conduct its business as the same exists on the date hereof and on
the Closing Date.

     Section 5.2 Authorization. Buyer has full corporate power and authority
under its certificate of incorporation and by-laws, and all necessary corporate
action has been taken to authorize it, to execute and deliver this Agreement and
the exhibits and schedules hereto, to consummate the transactions contemplated
herein and to take all actions required to be taken by it pursuant to the
provisions hereof or thereof, and each of this Agreement and the exhibits hereto
constitutes the valid and binding obligation of the Buyer enforceable against
Buyer in accordance with its terms, except as such enforcement may be subject to
bankruptcy, insolvency, reorganization, moratorium or other similar laws now or
hereafter in effect relating to creditors' rights and general principles of
equity.

     Section 5.3 Non-Contravention. Neither the execution and delivery of this
Agreement and the schedules and exhibits hereto, nor the consummation of the
transactions contemplated herein or therein, does or will violate, conflict with
or result in breach of or require notice or consent under any Applicable Law,
the charter or by-laws of Buyer or any provision of any agreement or instrument
to which the Buyer is a party or result in the creation of any Lien upon the
capital stock, property or assets of Buyer, such that there would be a material
adverse effect on any

                                      -28-

<PAGE>


benefit to Seller hereunder. Except as set forth in Schedule 5.3, no consent,
approval, exemption, authorization or other action of, or notice to or filing
with, any third party, court or administrative or other governmental or
regulatory body is required by Buyer to execute, deliver or perform this
Agreement and to consummate the transactions contemplated herein and to take all
actions required to be taken by it pursuant to the provisions hereof.

     Section 5.4 Validity. There are no pending or threatened judicial or
administrative actions, proceedings or investigations which question the
validity of this Agreement or any action taken or contemplated by Buyer in
connection with this Agreement.

     Section 5.5 Broker Involvement. Buyer has not hired, retained or dealt with
any broker or finder in connection with the transactions contemplated by this
Agreement.

     Section 5.6 Litigation. Except as set forth in Schedule 5.6, there is no
investigation, claim or proceeding or litigation of any type pending or
threatened involving Buyer and Buyer is unaware of any judgment, order, writ,
injunction or decree of any court, government or governmental agency or arbitral
tribunal against or involving Buyer, that would have a material adverse effect
on any benefit to Seller hereunder.

     Section 5.7 Investment Intention. The Shares are being purchased by Buyer
for investment purposes, and not with a view to, or for resale in connection
with, the distribution or other disposition thereof.

     Section 5.8 Disclosure of Information. Buyer agrees and acknowledges that
it and its employees, officers and agents have been permitted full and complete
access to the books and records, plants, facilities, equipment, tax returns,
contracts, inventories, and other assets and information of the Subsidiaries
which it and its employees, officers and agents have desired to review. Buyer
further acknowledges that it has conducted such investigation of the
Subsidiaries,

                                      -29-

<PAGE>


their assets, liabilities, operations and financial conditions, it has deemed
necessary and advisable for purposes of determining to enter into this
Agreement. Except to the extent of the express representations, warranties and
agreements contained in this Agreement, Buyer is purchasing the Subsidiaries in
reliance upon its own investigation of the Subsidiaries. Buyer agrees and
acknowledges that it is experienced in the tank testing services business and
has the knowledge and ability to conduct a full investigation of the
Subsidiaries and to evaluate the Subsidiaries' business, operations, financial
conditions, assets and liabilities. Buyer expressly represents and warrants that
it has not relied on any projections or representations (oral or written) except
as set out herein, which Buyer has obtained from Seller or the Subsidiaries
and/or any of their respect directors, officers, employees or agents.
Notwithstanding the foregoing, Seller's representations and warranties in this
Agreement or Buyer's right to rely thereon are not limited in any way as a
result of Buyer's investigation as described above.

     Section 5.9 Financial Condition. At Closing, Buyer's financial condition
will be adequate to bear the economic risks of this acquisition. At Closing, the
Buyer will be in compliance with all financial and other covenants related to
all of its outstanding credit agreements including the facilities being utilized
to consummate this transaction, and will not be in default on any credit
agreement or facility.

     Section 5.10 Restricted Securities. Buyer understands that the Shares are
characterized as "restricted securities" under the United States federal
securities laws and that under such laws and applicable rules and regulations
promulgated thereunder the Shares may be resold without registration under the
Securities Act of 1933, as amended (the "Act") only in certain circumstances.
Buyer understands that the certificates evidencing the Shares may contain a
legend

                                      -30-

<PAGE>


restricting transfer as provided under the Act and applicable rules and
regulations promulgated thereunder.

                                   ARTICLE VI

                       Additional Agreements and Covenants

     Section 6.1 Other Offers. From and after the date hereof until Closing,
Seller, or each of its officers, directors, stockholders, employees, affiliates,
representatives or agents shall not, directly or indirectly, (a) solicit, enter
into or conduct discussions relating to, initiate or knowingly encourage any
offer or proposal for, or any indication of interest in, directly or indirectly,
a merger or business combination involving a Subsidiary or the acquisition of an
equity interest in, or a substantial portion of the assets of, a Subsidiary or
(b) unless required by law, regulation or judicial compulsion, disclose any
nonpublic information relating to a Subsidiary or the Business of a Subsidiary,
or afford access to the properties, books or records of a Subsidiary, to any
person or entity.

     Section 6.2 Conduct of the Business Pending the Closing. Seller covenants
that until the Closing, each of the Subsidiaries shall comply, and Seller shall
cause the Subsidiaries to comply, with the provisions set forth below:

     (a) Each Subsidiary  shall operate its respective  Business in the ordinary
course;

     (b) Seller shall promptly notify Buyer of, and furnish to Buyer any
information that Buyer may reasonably request with respect to, the occurrence of
any event or the existence of any fact that may result in the representations
and warranties of Seller not being true if they were made at any time prior to
or as of the date of the Closing;

                                      -31-

<PAGE>



     (c) Except as set forth in Schedule 6.2, neither the Seller nor any of its
Subsidiaries shall (i) grant or agree to grant any bonuses to any employee,
officer, director, representative or agent of any Subsidiary, (ii) grant any
general increase in the rates of salaries or compensation of employees,
officers, directors, representatives or agents of any of the Subsidiaries or any
specific increase to any employee, officer, director, representative or agent of
any of the Subsidiaries, (iii) provide for any new pension, retirement or other
employment benefits to any employee, officer, director, representative or agent
of any of the Subsidiaries or any increase in any existing benefits, (iv)
terminate or amend in any respect or provide for any material increase in
benefits under any Seller Plan or (v) execute any employment agreement,
severance arrangement, consulting arrangement, sales agency agreement,
representation agreement or distribution agreement with any employee, officer,
director, representative or agent of any Subsidiary;

     (d) No Subsidiary shall amend its certificate of incorporation or by-laws
and neither the Seller nor any of the Subsidiaries shall enter into any merger
or consolidation agreement involving any Subsidiary or its assets;

     (e) Neither the Seller nor any of its Subsidiaries shall authorize for
issuance, issue, sell, deliver or agree or commit to issue, sell or deliver
(whether through the issuance or granting of options, warrants, commitments,
subscriptions, rights to purchase or otherwise) any capital stock of any class
or any other securities or equity equivalents of any Subsidiary or amend any of
the terms of any such securities or agreements;

     (f) Seller shall use best efforts to maintain and preserve the Business of
each Subsidiary intact, to retain each Subsidiary's present employees so that
they will be available after the Closing and to maintain each Subsidiary's
existing relationships with

                                      -32-

<PAGE>


customers,  suppliers  and  others  so  that  those  relationships  will be
preserved after the Closing;

     (g) None of the Subsidiaries shall sell, assign or dispose of any of its
material assets or properties, tangible or intangible, or incur or assume any
liabilities or enter into any sale/leaseback or similar transaction, except for
sales and dispositions made, or liabilities incurred, in the ordinary course of
business consistent with past practices;

     (h) None of the Subsidiaries shall assume, guarantee, endorse or otherwise
become liable or responsible (whether directly, contingently or otherwise) for
the obligations of any other person or entity or make any loans, advances or
capital contributions to or investments in any other person or entity;

     (i) Seller and its Subsidiaries shall maintain in full force and effect all
insurance currently maintained as set forth in Schedule 4.21;

     (j) Neither the Seller nor any of its Subsidiaries shall take, or agree in
writing or otherwise to take, any of the actions described in this Section 6.2
or any action that would make any representation or warranty inaccurate or
untrue or that would result in any of the conditions set forth in Article VIII
hereof not being satisfied;

     (k) Seller and its Subsidiaries shall comply in all material respects with
all Applicable Laws including, without limitation, Environmental Laws;

     (l) Each Subsidiary shall maintain the books of account and records in the
usual, regular and customary manner consistent with practices employed prior to
the date hereof;

     (m) Seller and each Subsidiary shall not implement or adopt (i) any change
in its accounting methods or principles or the application thereof (including
depreciation

                                      -33-

<PAGE>


lives) or (ii) any material  change in its tax methods or principles or the
application thereof (including depreciation lives); and

     (n) No Subsidiary shall split, combine or reclassify any shares of its
capital stock, declare, set aside or pay any dividends or other distributions in
respect of its capital stock or redeem, purchase or otherwise acquire any of its
capital stock.

     Section 6.3 Public Announcements. Subject to applicable securities law,
stock exchange requirements or judicial compulsion, neither Seller or a
Subsidiary or another Affiliate of Seller nor Buyer or another Affiliate of
Buyer shall, without the prior approval of Seller or Buyer, as the case may be,
issue, or permit any of their respective directors, officers, employees, agents
to issue, any press release or other public announcement with respect to this
Agreement or the transactions contemplated hereby.

     Section 6.4 Further Assurances. The Seller and Buyer each shall execute,
acknowledge and deliver or cause to be executed, acknowledged and delivered to
Buyer or Seller, as the case may be, such assignments or other instruments of
transfer, assignment and conveyance, in form and substance reasonably
satisfactory to counsel of Buyer or counsel of Seller, as the case may be, as
shall be necessary to vest in Buyer all of the right, title and interest in and
to the Shares free and clear of all liens, charges, encumbrances, rights of
others, mortgages, pledges or security interests, and any other document
reasonably requested by Buyer in connection with this Agreement. Seller and
Buyer each agree that, from time to time, whether before, at or after the
Closing Date, it will execute and deliver such further instruments and take such
other action as may be reasonably necessary to carry out the purposes and intent
of this Agreement.

                                      -34-

<PAGE>



     Section  6.5 Covenant Against Competition.

     (a) As an essential consideration for the obligations of Buyer under this
Agreement, Seller hereby agrees and covenants that, for a period of five years
following the Closing Date, without Buyer's written consent,

          (i) neither Seller nor any of its Affiliates other than a current
     member of the Board of Directors of the Seller shall engage in any manner
     in any business in competition with the Business of any Subsidiary or
     provide products or services of the same general type as those provided by
     a Subsidiary, in the geographic areas in which the Subsidiaries have
     provided products or services within one year before Closing; and

          (ii) neither Seller nor any of its Affiliates other than a current
     member of the Board of Directors of the Seller shall hire, attempt to hire
     or assist any other person in hiring or attempting to hire, or discouraging
     any person from accepting employment with a Subsidiary, or inducing to
     leave the employ of a Subsidiary, any employee or officer of a Subsidiary,
     or any person who was an employee or officer of a Subsidiary within one
     year prior to the Closing Date.

     (b) If Buyer believes Seller or any Affiliate has violated the provisions
of this Section 6.5, Buyer shall have the right to seek relief from any court of
competent jurisdiction. Seller acknowledges that money damages alone will not
adequately compensate Buyer in the event of a breach of the covenants of this
Section. Therefore, Seller agrees that in addition to all remedies available at
law, in equity or under this Agreement, Buyer shall be entitled to injunctive
relief for the enforcement of this covenant. Seller agrees that the covenants in
this Section are reasonable with respect to their duration, scope and

                                      -35-

<PAGE>


geographical area. If, at the time of enforcement of this Section, a court
should hold that the restrictions herein are unreasonable under the
circumstances then existing or otherwise, the parties agree that the maximum
duration, scope or geographical area legally permissible under such
circumstances will be substituted for the duration, scope or area stated herein.

     Section 6.6 Governmental Filings. As promptly as practicable after the
execution of this Agreement, each party shall, in cooperation with the other,
file any reports or notifications that may be required to be filed by it under
applicable law and shall furnish to the other all such information in its
possession as may be necessary for the completion of the reports or
notifications to be filed by the other.

     Section 6.7 Access to Information. Prior to Closing, Buyer may make such
investigation of the business and properties of Seller and the Subsidiaries as
Buyer may desire and, upon reasonable notice, Seller and the Subsidiaries shall
give to Buyer and its counsel, accountants and other representatives reasonable
access, during normal business hours throughout the period prior to the Closing,
to the property, books, commitments, agreements, records, files and personnel of
Seller and the Subsidiaries, and Seller shall furnish to Buyer during that
period all copies of documents and information concerning the Business of Seller
and the Subsidiaries as Buyer may reasonably request, subject to applicable law.
Buyer shall hold, and shall cause its counsel, accountants and other agents and
representatives to hold, all such information and documents in confidence.
Seller will cooperate with Buyer's transition planning for the acquisition by
providing access to key executives of Seller and the Subsidiaries.

     Section 6.8 Use of Name. Prior to or at Closing, Seller shall eliminate,
and cease and desist from, any use of the designation "Tanknology," "Vacutect,"
"Vacutest" or any similar name or designation or any designation indicating an
affiliation with a Subsidiary (the

                                      -36-

<PAGE>


"Tanknology Designation") and shall commence doing business under an assumed
name. At the next meeting of shareholders but in any event no later than June
30, 1997, Seller shall officially change its name to a name that does not
include a Tanknology Designation.

     Section 6.9 Other Action. Each of the parties shall use its best efforts to
cause the fulfillment at the earliest practicable date but, in any event, prior
to the Closing Date of all conditions to their respective obligations to
consummate the transactions under this Agreement.

     Section 6.10 Employee Benefit Matters. Effective as of the Closing Date,
the Seller shall amend all Subsidiary Plans except stock options plans of the
Seller to terminate the participation of the Subsidiaries therein, and shall
further amend the Seller's defined contribution Subsidiary Plans except stock
option plans of the Seller to provide for full vesting of the accounts of all
current and former employees of the Subsidiaries participating therein.

     Section 6.11 Cooperation with Financings and Financial Reporting. Seller
acknowledges and understands that in the event Buyer conducts certain offerings
of its securities or is subject to reporting requirements under the Exchange
Act, Buyer will be required to obtain certain information relating to the
Seller, the Subsidiaries or the Business, including, but not limited to, audited
or unaudited financial statements of Seller and the Subsidiaries, and disclose
such information in registration statements and other documents filed with the
Securities and Exchange Commission under the federal securities laws or in
disclosure documents given investors in certain securities offerings. Seller
agrees to use its best efforts to cooperate fully and promptly, and shall cause
their affiliates, accountants, counsel and other agents and representatives to
cooperate fully and promptly, with Buyer in connection therewith.

     Section 6.12 Consents. Each party will cooperate with the other and
proceed, as promptly as is practicable, to seek to obtain all necessary consents
and approvals set forth

                                      -37-

<PAGE>


in Schedule 4.4 or Schedule 5.3, and to endeavor to comply with all other legal
or contractual requirements for or preconditions to the execution and
consummation of this Agreement.

     Section 6.13 Tax Certificate. On or before the Closing Date, Seller will
provide to Buyer a certificate ("Tax Certificate") that sets forth the following
information as of the date for each particular item of information which is as
close to the Closing Date as is reasonably practicable:

     (a) The following information shall be provided in accordance with the
reporting of such information on the most recently filed Tax Return for each
such Tax:

          (i) The adjusted basis for Tax purposes of the assets of each of the
     Seller and the Subsidiaries, and

          (ii) The amounts of the net operating loss, net capital loss, foreign
     Tax credit and Tax credit carry forwards, the overall foreign losses and
     the foreign Taxes paid or accrued in excess of the applicable foreign Tax
     credit limitations of or allocable to each of the Subsidiaries;

     (b) All current consents and elections with respect to Taxes of or with
respect to each of the Subsidiaries that have been filed with any taxing
authority;

     (c) All taxable  periods for which the income and  franchise Tax Returns of
or with respect to each of the Subsidiaries are open; and

     (d) All Tax partnerships in which either of the Subsidiaries is a member.

     Section 6.14 Certain Tax Elections. Buyer and Seller shall make a timely
and effective joint election (the "Section 338(h)(10) Election") under Section
338(h)(10) of the Code for each of Tanknology and USTMAN with respect to the
purchase of the Tanknology Shares and the USTMAN Shares. Moreover, Buyer shall
prepare completed Forms 8023-A for each of

                                      -38-

<PAGE>


Tanknology and USTMAN providing for the Section 338(h)(10) Elections. If Buyer
and Seller disagree as to any information (including but not limited to the
valuation of any asset) required to be provided on any Form 8023-A (including
any schedule attached thereto), the specific matters in dispute shall be
submitted to the Auditors, or such independent accounting firm as may be
approved by Seller and Buyer, which firm shall render its opinion as to such
matters. Based on such opinion, such independent accounting firm will then send
to Seller and Buyer its determination of the specified matters in dispute, which
determination shall be final and binding on the parties hereto. The parties
agree to represent such information on Form 8023-A consistent with such
Auditors' opinion. The fees and expenses of the Auditors shall be borne one-half
by Seller and one-half by Buyer. At the Closing Date or as soon as practicable
thereafter, Seller and Buyer will jointly execute such Forms 8023-A, and
thereafter Buyer, on behalf of Buyer and Seller, will timely file such Forms
8023-A with the relevant taxing authority and will provide proof of such filing
to Seller. Buyer shall have the right, but not the obligation, to make an
election under Section 338(g) of the Code for Tanknology Canada with respect to
the purchase of Tanknology Shares.

     Section 6.15 Liability for Taxes.

     (a) Seller shall be liable for, and shall defend, indemnify and hold Buyer
harmless against, (i) any Taxes incurred by any of the Subsidiaries for any
taxable period ending on or before the Closing Date, (ii) a portion, determined
in the manner set forth in this Section 6.15, of any Taxes incurred by any of
the Subsidiaries for any taxable period that includes the Closing Date but ends
after the Closing Date ("Straddle Period"), (iii) any income Taxes caused by, or
arising from, the Section 338(h)(10) Election, (iv) any transfer or sales Taxes
arising from the transactions contemplated in this Agreement, other than
transfer or sales Taxes that are imposed because of the Section 338(h)(10)
Election if such

                                      -39-

<PAGE>


Taxes are in excess of the transfer or sales Taxes that would have been imposed
if the Section 338(h)(10) Election had not been made, and (v) any Taxes imposed
with respect to any payment from Seller under this sentence. Any Tax refunds
received by the Buyer relating to the Tax liability of a Subsidiary for a period
ending on or before the Closing Date shall be the property of the Seller other
than Tax refunds generated because of a Buyer tax attribute. Seller will ensure
that with respect to any Tax partnership listed on the Tax Certificate, the
appropriate party has made or will make a valid election under Section 754 of
the Code with respect to each such Tax partnership in the time and in the manner
provided in Regulation ss. 1.754-1(b) such that each such election is in effect
for the taxable year of each such Tax partnership that includes the Closing
Date.

     (b) If a Straddle Period exists for any of the Subsidiaries for any Tax
purpose, the Buyer, Seller, and such Subsidiary, to the extent permitted by law,
shall elect to treat such period for purposes of this Agreement as consisting of
two periods: (i) a period beginning with the first day of the Straddle Period
and ending on the Closing Date ("Pre- Closing Period") and (ii) a period
beginning immediately after the Closing Date and ending with the last day of the
Straddle Period ("Post-Closing Period"). If applicable law does not permit such
an election to be made, Taxes for the entire Straddle Period shall be
apportioned between the Pre-Closing Period and the Post-Closing Period under the
interim-closing-of- the-books method applied on the Closing Date, except that
exemptions, allowances, deductions, and credits calculated under Applicable Law
on an annual basis shall be apportioned on a per diem basis between these two
periods. Seller shall be liable for the Taxes apportioned to the Pre-Closing
Period.

                                      -40-

<PAGE>



     (c) Seller shall prepare, or cause the Subsidiaries to prepare, and submit
to Buyer all Tax Returns of the Subsidiaries (and any Tax partnerships in which
(i) a Subsidiary owns an interest and (ii) Seller or a Subsidiary has
responsibility for preparing and filing partnership Tax Returns) for Taxes for
any taxable period ending on or before the Closing Date and for which the due
date of any such Tax Return is subsequent to the Closing Date. Any such Tax
Return shall be prepared on a basis consistent with Tax Returns prepared with
respect to the Subsidiaries for prior taxable periods, unless otherwise required
by law, and shall be submitted to Buyer not later than (i) in the case of any
United States federal income or Canadian income Tax Return, 60 days before the
due date of such Tax Return, and (ii) in the case of any other Tax Return, 30
days before the due date of such Tax Return. Seller is responsible for filing
any such Tax Return and for preparing and filing any other Tax Return of the
Subsidiaries for Taxes for any taxable period ending on or before the Closing
Date.

     (d) Buyer and its Affiliates, including the Subsidiaries, are responsible
for preparing and filing with the appropriate taxing authorities all Tax Returns
which relate to the Taxes of the Subsidiaries other than those described in
Section 6.15(c), except that Tax Returns which relate to a Post-Closing Period
shall be completed by the Buyer. Seller shall cooperate with the Buyer and shall
make available all necessary records and timely take all action necessary to
allow Buyer to file, or prepare and file, as the case may be, the Tax Returns
described in this paragraph (including, without limitation, providing or causing
to be provided to Buyer any powers of attorney which Buyer shall request for
purposes of filing any such Tax Returns). Such Tax Returns shall be prepared on
a basis consistent with those

                                      -41-

<PAGE>


prepared with respect to the Subsidiaries for taxable periods ending on or
before the Closing Date, unless otherwise required by law.

     (e) Notwithstanding any provision in this Section 6.15 to the contrary, the
Buyer shall reimburse the Seller for certain Taxes, if any, incurred by the
Seller in connection with the liability of an affiliated, combined, or unitary
group of corporations with respect to the income, if any, of the Subsidiaries
from the period from August 31, 1996, through the Closing Date in an amount
equal to 37% of the net taxable income, reduced by all appropriate expenses,
deductions and credits, of the Subsidiaries for such period determined in
accordance with United States federal income tax principles ("Reimbursable
Taxes"). The Buyer has an obligation to reimburse the Seller for such
Reimbursable Taxes only if (i) the Seller submits, on or after the date the
Seller filed all Tax returns relating to the period from August 31, 1996 through
the Closing Date, to the Buyer a certificate (and such supporting documentation
as the Buyer may reasonably request) prepared by the Seller setting forth the
amount of such Reimbursable Taxes. If the Buyer disputes the amount of such
Reimbursable Taxes set forth on such certificate, the parties shall submit the
specific matters in dispute to the Auditors, or such independent accounting firm
as may be approved by Seller and Buyer, which firm shall render its opinion as
to such matters. Based on such opinion, such independent accounting firm will
then send to Seller and Buyer its determination of the specified matters in
dispute, which determination shall be final and binding on the parties hereto.
The fees and expenses of the Auditors shall be borne one-half by Seller and
one-half by Buyer. The Buyer shall make such reimbursement payment within 60
days of receiving the certificate and supporting documentation referred to in
this Section 6.15(e), unless a dispute is submitted to the Auditors. If a
dispute regarding the Reimbursable Taxes is

                                      -42-

<PAGE>


submitted to the Auditors, the payment, if any, shall be made within 15 days of
the Auditors' decision.

     (f) Any payment made with respect to Taxes pursuant to this Section 6.15
shall be treated by Seller and Buyer as a nontaxable adjustment to the Purchase
Price for the Shares.

     Section 6.16 Cooperation and Exchange of Information. The parties will
provide each other with such cooperation and information as they may reasonably
request of each other in preparing or filing any Tax Return, amended Tax Return
or claim for refund, in determining a liability or a right to refund or in
conducting any audit or other proceeding, in respect of Taxes imposed on the
parties or their respective Affiliates. The Subsidiaries and each party will
preserve and retain all Tax Returns, schedules, work papers and other documents
relating to any such Tax Returns, claims, audits or other proceedings until the
expiration of the statutory period of limitations (including extensions) of the
taxable periods to which such documents relate and until the final determination
of any payments which may be required with respect to such periods under this
Agreement and shall make such documents available to representatives of Seller
upon reasonable notice and at reasonable times, it being understood that such
representatives shall be entitled to make copies of any such books and records
as they shall deem necessary. Any information obtained pursuant to this Section
6.16 shall be kept confidential, except as may be otherwise necessary in
connection with the filing of Tax Returns or claims for refund or in conducting
any audit or other proceeding.

     Section 6.17 Conflict. In the event of a conflict between the provisions of
Sections 6.13, 6.14, 6.15, or 6.16 and any other provision of this Agreement,
the provisions of this Article VI shall control.

                                      -43-

<PAGE>



     Section 6.18 Insurance. Buyer agrees to procure and maintain for three
years after the Closing Date commercial general liability insurance and
environmental liability insurance covering contractors' legal liability and
professional/errors & omissions liability with no pollution exclusion with
policy terms, conditions, exclusions, limits and deductibles not materially less
favorable than such insurance maintained by Seller, as described in Schedule
6.18.


                                   ARTICLE VII

                     Extent and Survival of Representations,

              Warranties, Covenants and Agreements; Indemnification

     Section 7.1 Indemnification of Buyer. Seller agrees to defend, indemnify
and hold harmless Buyer (including its officers, directors, employees and agents
and Affiliates) from and against, any and all claims, actions, causes of action,
arbitrations, proceedings, losses, damages, liabilities, judgments and expenses
(including, without limitation, reasonable attorneys' fees) ("Claim") incurred
by Buyer, any Affiliate of Buyer, Seller or any Subsidiary as a result of (a)
any error, inaccuracy, breach or misrepresentation in any of the representations
and warranties made by or on behalf of Seller in this Agreement or in any
certificate or other instrument delivered by or on behalf of Seller in
connection with this Agreement (including the Schedules hereto), (b) any
violation or breach by Seller of or default by Seller under the terms of this
Agreement, (C) any act or omission occurring, or condition or circumstances
existing, prior to the Closing, or any condition or circumstances caused by any
act or omission occurring prior to the Closing, by Seller or any Subsidiary or
otherwise with respect to Seller or any Subsidiary, (d) the past or present
presence, release, remediation or clean-up of, or exposure to, Hazardous
Material relating to or located on,

                                      -44-

<PAGE>


within or under any assets owned, leased or used by Seller or any Subsidiary, or
(e) any product liability, strict liability or other claims concerning (i)
products sold or services provided by Seller or any Subsidiary prior to the
Closing or (ii) inventory owned by Seller or any Subsidiary at the Closing.
Buyer shall be entitled to recover its reasonable and necessary attorneys' fees
and litigation expenses incurred in connection with successful enforcement of
its rights under this Section.

     Section 7.2 Survival; Threshold and Limits of Liability.

     (a) The representations, warranties and covenants in this Agreement and in
any certificate or instrument delivered in connection herewith shall be
continuing and shall survive the Closing until two years after the Closing Date
(the period during which the representations and warranties shall survive being
referred to herein with respect to such representations and warranties as the
"Survival Period"), but shall thereafter terminate and be of no further force
and effect unless a written notice asserting a claim shall have been made
pursuant to this Article VII within the Survival Period with respect to such
matter. Any claim for indemnification of a Claim of the type set forth in
Section 7.1(a)-(d) of this Agreement (a "Section 7.1 Claim") made during the
Survival Period shall remain in effect for purposes of such indemnification
notwithstanding such claim may not be resolved within the Survival Period.
Seller shall indemnify Buyer for any Section 7.1 Claim in an aggregate amount up
to $1,000,000 in excess of any estimated liabilities accrued therefore by the
Subsidiaries and transferred to Buyer and any insurance proceeds realized by
Buyer in respect of such Claims net of any insurance premiums that become due as
a result of such Claims.

     (b) Any claim for indemnification of Buyer for a Claim of the type set
forth in Section 7.1(e) (a "Section 7.1(e) Claim") must be made no later than
three years after

                                      -45-

<PAGE>


the Closing Date. Any such Claim shall remain in effect for purposes of such
indemnification even if the Claim is not resolved within three years after the
Closing Date. Seller shall indemnify Buyer for any Section 7.1(e) Claim up to an
aggregate amount of $1,250,000 in excess of $659,650, representing the estimated
liabilities accrued therefore by the Subsidiaries to be transferred to Buyer,
and in excess of any insurance proceeds realized by Buyer in respect of Section
7.1(e) Claims net of any insurance premiums that become due as a result of such
Claim.

     Section 7.3 Indemnification Procedures. All claims for indemnification
under this Agreement shall be asserted and resolved as follows:

     (a) A party claiming indemnification under this Agreement (an "Indemnified
Party") shall with reasonable promptness (i) notify the party from whom
indemnification is sought (the "Indemnifying Party") of any third-party claim or
claims asserted against the Indemnified Party ("Third Party Claim") for which
indemnification is sought and (ii) transmit to the Indemnifying Party a copy of
all papers served with respect to such claim (if any) and a written notice
("Claim Notice") containing a description in reasonable detail of the nature of
the Third Party Claim, an estimate of the amount of damages attributable to the
Third Party Claim to the extent feasible (which estimate shall not be conclusive
of the final amount of such claim) and the basis of the Indemnified Party's
request for indemnification under this Agreement.

     Within 15 days after receipt of any Claim Notice (the "Election Period"),
the Indemnifying Party shall notify the Indemnified Party whether the
Indemnifying Party disputes its potential liability to the Indemnified Party
with respect to such Third Party Claim and, if the Indemnifying Party does not
dispute its potential liability to the Indemnified Party with respect to

                                      -46-

<PAGE>


such Third Party Claim, whether the Indemnifying Party elects to defend the
Indemnified Party with respect to such Third Party Claim.

     If the Indemnifying Party does not dispute its potential liability to the
Indemnified Party within the Election Period and notifies the Indemnified Party
that it elects to defend such Third Party Claim, the Indemnified Party shall
control negotiations toward resolution of such claim without the necessity of
litigation, and if litigation ensues, to defend the same with counsel reasonably
acceptable to both parties, at the Indemnifying Party's expense, and the
Indemnified Party shall extend reasonable cooperation in connection with such
defense. The Indemnified Party shall be entitled to elect to participate in, but
not to control, the defense of any Third Party Claim resulting in litigation, at
its own cost and expense; provided, however, that if the parties to any suit or
proceeding shall include the Indemnifying Party as well as the Indemnified Party
and the Indemnified Party shall have been advised by counsel that one or more
legal defenses may be available to it that may not be available to the
Indemnifying Party, then the Indemnified Party shall be entitled to elect to
control such suit or proceeding, but the Indemnifying Party shall be obligated
to bear the fees and expenses of counsel of the Indemnified Party, which shall
be selected by the Indemnified Party in its complete and sole discretion. If the
Indemnifying Party does not dispute its potential liability to the Indemnified
Party within the Election Period and the Indemnified Party fails to assume
control of the negotiations prior to litigation or to defend such action within
a reasonable time, the Indemnifying Party shall be entitled, but not obligated,
to assume control of such negotiations or defense of such action, and the
Indemnifying Party shall be liable to the Indemnified Party for its expenses
reasonably incurred or amounts paid in connection therewith. If the Indemnifying
Party disputes its potential liability to the Indemnified Party within the
Election Period or does not elect to defend such Third Party Claim, then the
Indemnified Party shall be

                                      -47-

<PAGE>


entitled to assume control of such negotiations or defense of action and the
liability for the expense thereof, as well as any liability with respect to such
Third Party Claim, shall be determined as provided in Section 7.4 below.

     If the Indemnifying Party fails to notify the Indemnified Party within the
Election Period that the Indemnifying Party elects to defend the Indemnified
Party pursuant to the preceding paragraph, or if the Indemnifying Party elects
to defend the Indemnified Party but fails to prosecute or settle the Third Party
Claim as herein provided, then the Indemnified Party shall have the right to
defend, at the sole cost and expense of the Indemnifying Party (if the
Indemnified Party is entitled to indemnification hereunder), the Third Party
Claim by all appropriate proceedings, which proceedings shall be promptly and
vigorously prosecuted by the Indemnified Party to a final conclusion or settled.
The Indemnified Party shall have full control of such defense and proceedings.
Notwithstanding the foregoing, if the Indemnifying Party has delivered a written
notice to the Indemnified Party to the effect that the Indemnifying Party
disputes its potential liability to the Indemnified Party under this Article VII
and if such dispute is resolved in favor of the Indemnifying Party, the
Indemnifying Party shall not be required to bear the costs and expenses of the
Indemnified Party's defense pursuant to this Section or of the Indemnifying
Party's participation therein at the Indemnified Party's request, and the
Indemnified Party shall reimburse the Indemnifying Party in full for all costs
and expenses of such litigation. The Indemnifying Party may participate in, but
not control, any defense or settlement controlled by the Indemnified Party
pursuant to this Section, and the Indemnifying Party shall bear its own costs
and expenses with respect to such participation.

     Neither the Indemnifying Party nor the Indemnified Party shall settle,
compromise, or make any other disposition of any Third Party Claim which would
or might result

                                      -48-

<PAGE>


in any liability to the Indemnified Party or the Indemnifying Party under this
Article VII without the written consent of such other party.

     (b) In the event any Indemnified Party should have a claim against any
Indemnifying Party hereunder that does not involve a Third Party Claim, the
Indemnified Party shall transmit to the Indemnifying Party a written notice (the
"Indemnity Notice") describing in reasonable detail the nature of the claim, an
estimate of the amount of damages attributable to such claim to the extent
feasible (which estimate shall not be conclusive of the final amount of such
claim) and the basis of the Indemnified Party's request for indemnification
under this Agreement. If the Indemnifying Party does not notify the Indemnified
Party within 15 days from its receipt of the Indemnity Notice that the
Indemnifying Party disputes such claim, the claim specified by the Indemnified
Party in the Indemnity Notice shall be deemed a liability of the Indemnifying
Party hereunder.

     Section 7.4 Arbitration of Disputes. If the Indemnifying Party disputes,
either as to the amount or liability, that any claim described in a Claim Notice
or an Indemnity Notice, as the case may be, is covered by such Indemnifying
Party's covenant to indemnify contained in this Article VII, then the
Indemnifying Party and the Indemnified Party agree to promptly negotiate in good
faith to resolve their differences and to mutually agree upon an amount, if any,
owed to Indemnified Party by the Indemnifying Party hereunder. If Indemnifying
Party and Indemnified Party fail to agree within 30 days thereafter, the dispute
shall be resolved by binding and final arbitration of a single arbitrator
mutually agreed to by Buyer and Seller conducted in Houston, Texas in accordance
with the rules of commercial arbitration of the American Arbitration
Association. The prevailing party in any such arbitration proceeding shall be
entitled to attorneys'

                                      -49-

<PAGE>


fees and other out-of-pocket expenses reasonably and necessarily incurred in
connection with such proceeding, the amounts of which shall be contained in the
award of the arbitrator.

     Section 7.5 General. The covenants and agreements entered into pursuant to
this Agreement to be performed after the Closing shall survive the Closing
without limitation. The indemnification obligations under this Article VII shall
apply regardless of whether any Claim results solely or in part from the active,
passive or concurrent negligence of the Indemnified Party or a Subsidiary prior
to the Closing Date. The parties agree that this Article VII does not entitle
the Buyer to indemnification for the Buyer's or a Subsidiary's act or omission
after the closing Date. The rights of the parties to indemnification under this
Article VII shall not be limited due to any investigations heretofore or
hereafter made by such parties or their representatives, regardless of
negligence in the conduct of any such investigations. All representations,
warranties and covenants and agreements made by the parties shall not be deemed
merged into any instruments or agreements delivered in connection with the
Closing or otherwise in connection with the transactions contemplated hereby.

     Section 7.6 Security. Seller agrees that it shall not effect its
liquidation, dissolution, change of control, merger or sale of all or a
substantial portion of its assets, or any event causing it to cease to exist,
without assigning its obligations under this Section VII to a third party
acceptable to Buyer and/or posting security for such indemnification
obligations, in each case, to Buyer's reasonable satisfaction sufficient to
cover Seller's obligations hereunder throughout the period of time such
obligations exist.

                                      -50-

<PAGE>


                                  ARTICLE VIII

                              Conditions to Closing

     Section 8.1 Conditions Precedent to Obligations of Buyer. The obligation of
the Buyer to consummate the purchase under this Agreement is subject to the
fulfillment, prior to or at the Closing, of each of the following conditions
(any or all of which may be waived by the Buyer):

     (a) all representations and warranties of the Seller contained in this
Agreement including all Schedules to this Agreement shall be true and correct in
all respects at and as of the time of the Closing with the same effect as though
made again at, and as of, that time, except such as will not have a material
adverse effect and except such as would not reasonably be expected to have a
material adverse effect on the Seller's ability to perform its obligations under
this Agreement;

     (b) Seller shall have performed and complied in all material respects with
all obligations and covenants required by this Agreement to be performed or
complied with by the Seller prior to or at the Closing;

     (c) Buyer shall have been furnished with a certificate, dated the Closing
Date, executed by an officer of the Seller (other than the Chief Financial
Officer) certifying to the fulfillment of the conditions specified in Sections
8.1(a) and 8.1(b) hereof;

     (d) no provision of any Applicable Law shall prohibit, and there shall not
be in effect any injunction, restraining order or decree issued by a court of
competent jurisdiction or any governmental body that shall prohibit, the
consummation of this Agreement and there shall be no action or proceeding
pending or threatened seeking any such injunction, order or decree;

                                      -51-

<PAGE>



     (e) Buyer shall have received proceeds from loans from one or more
commercial banks and/or commercial lenders totaling at least $12,000,000 on
terms and conditions satisfactory to Buyer in order to finance the transactions
contemplated hereby, related transaction costs and working capital;

     (f) Seller shall have received all consents, approvals and Permits to
execute this Agreement and to consummate the transactions contemplated hereby;
and

     (g) Buyer shall be furnished with an opinion of counsel to Seller and each
of the Subsidiaries, as to the due execution and delivery of this Agreement and
the documents delivered by Seller at Closing and substantially as to the matters
set forth in Sections 4.1, 4.3, 4.4, 4.7 and 4.8 hereof and such other matters
as Buyer may reasonably request.

     Section 8.2 Conditions Precedent to Obligations of the Seller. The
obligation of the Seller to consummate the sale under this Agreement is subject
to the fulfillment, prior to or at the Closing, of each of the following
conditions (any or all of which may be waived by the Seller):

     (a) all representations and warranties of the Buyer contained in this
Agreement, including all Schedules to this Agreement, shall be true and correct
in all respects at and as of the time of the Closing with the same effect as
though made again at, and as of, that time, except such as would not reasonably
be expected to have a material adverse effect on the Buyer's ability to perform
its obligations under this Agreement;

     (b) Buyer shall have performed and complied in all material respects with
all obligations and covenants required by this Agreement to be performed or
complied with by the Buyer prior to or at the Closing;

                                      -52-

<PAGE>




     (c) Seller shall have been furnished with a certificate, dated the Closing
Date, executed by an officer of the Buyer certifying to the fulfillment of the
conditions specified in Sections 8.2(a) and 8.2(b) hereof; and

     (d) no provision of any Applicable Law shall prohibit, and there shall not
be in effect any injunction or restraining order issued by a court of competent
jurisdiction in any action or proceeding against, the consummation of this
Agreement.

                                   ARTICLE IX

                         Actions to be Taken at Closing

     Section 9.1 Actions to be Taken by Seller at the Closing. Seller shall take
the following actions at the Closing:

     (a) Seller shall deliver to Buyer copies certified by its Secretary of
resolutions duly adopted by the boards of directors of Seller and each
Subsidiary authorizing and approving the execution and delivery of this
Agreement, including the exhibits and schedules hereto, and the consummation of
the transactions contemplated herein;

     (b) Seller shall execute and deliver to Buyer a bill of sale and deeds,
assignments and any other necessary instruments, satisfactory in form and
content and approved prior to Closing by Buyer, conveying the Shares and assets
of each Subsidiary (other than Excluded Assets) to Buyer;

     (c)  Seller  shall  deliver  the  officer's   certificate  referred  to  in
Section 8.1(c);

     (d) Buyer  shall have been  furnished  with a legal  opinion as provided in
Section 8.1(g) hereof; and

                                      -53-

<PAGE>




     (e) Seller shall have delivered to Buyer a letter of resignation from each
noncontinuing officer and director of each Subsidiary.

     Section 9.2 Actions to be Taken by Buyer at the Closing. Buyer shall take
the following actions at the Closing:

     (a) Buyer shall deliver to Seller a copy certified by its Secretary of
resolutions duly adopted by the board of directors of Buyer authorizing and
approving the execution and delivery of this Agreement, including the exhibits
and schedules hereto, and the consummation of the transactions contemplated
herein;

     (b) Buyer shall make the payment of funds  specified for payment at Closing
under Sections 2.2 and 2.3 above; and

     (c) Buyer shall  deliver the officer's  certificate  referred to in Section
8.2(c).

                                    ARTICLE X

                               General Provisions

     Section  10.1 Termination.

     (a) This Agreement may be terminated at any time prior to the Closing:

          (i) by mutual written agreement executed by the Seller and the
     Buyer; or

          (ii) if the Board of Directors of the Seller in the exercise of its
     fiduciary duties under applicable laws as advised in writing by counsel
     withdraws or modifies its approval or recommendation of the proposed
     acquisition of Shares by the Buyer on the terms and conditions set forth
     herein in any manner adverse to Buyer and recommends or approves a
     Competing Transaction, or resolves

                                      -54-

<PAGE>


     to do the foregoing. For purposes of this Agreement, "Competing
     Transaction" shall mean any merger, consolidation, share exchange, business
     combination or similar transaction involving any of the Subsidiaries, or
     the acquisition in any manner, directly or indirectly, of a material
     interest in any voting securities of, or a material interest in a
     substantial portion of the assets of, any of the Subsidiaries, other than
     the transactions contemplated by this Agreement.

     (b) Upon termination of this Agreement, neither of the parties nor any
other person shall have any liability or further obligation arising out of this
Agreement except for any liability resulting from its breach of this Agreement
prior to termination and as stated in Section 10.1(c) hereof, except that the
provisions of Sections 10.2, 10.3, 10.9 and 10.11 shall continue to apply.

     (c) In the event Seller terminates this Agreement pursuant to Section
10.1(a)(ii) hereof and enters into a Competing Transaction on or before March
31, 1997, Seller shall reimburse Buyer for its reasonable costs related to
Buyer's proposed acquisition of the Shares, not to exceed $250,000.

     Section  10.2 Confidentiality; Publicity; Books and Records.

     (a) For three years, neither party nor any Affiliate thereof will, directly
or indirectly, disclose or provide to any other person any non-public
information of a confidential nature concerning the other party or their
business or operations, and neither Seller nor any Affiliate thereof will
directly or indirectly, disclose or provide to any other person any non-public
information of a confidential nature concerning any Subsidiary or their business
or operations, except as is required in governmental filings or judicial,
administrative or arbitration proceedings. In the event that a party or its
Affiliate becomes

                                      -55-

<PAGE>


legally required to disclose any such information in any governmental filings or
judicial, administrative or arbitration proceedings, that party shall, and shall
cause such Affiliate to, provide the other party with prompt notice of such
requirement so that the other party may seek a protective order or other
appropriate remedy. In the event that such protective order or other remedy is
not obtained, the disclosing party shall, and shall cause such Affiliate to,
furnish only that portion of the information that the disclosing party or such
Affiliate, as the case may be, is advised by its counsel is legally required and
such disclosure shall not result in any liability hereunder unless such
disclosure was caused by or resulted from a previous disclosure by the other
party which was not permitted by this Agreement, by that certain Confidentiality
Agreement between the parties dated as of April 18, 1995 or that certain
Confidentiality Agreement between the parties dated as of January 24, 1996.
Subject to applicable securities law or stock exchange requirements, the parties
hereto will promptly advise, and obtain the approval of, the other parties
before issuing any press release with respect to this Agreement or the
transactions contemplated hereby.

     (b) If the parties fail to close the acquisition of Shares contemplated in
this Agreement, each party shall, and shall cause its officers, directors,
employees, representatives and agents (the "Representatives") to return all
copies of the other party's confidential non- public information in its
possession or in the possession of its Representatives, and destroy all copies
of any analyses, compilations, studies or other documents prepared by that party
or its Representatives or for its use containing or reflecting any such
information.

     For purposes of this Agreement, non-public information of a confidential
nature shall not include any information which (i) at the time of disclosure or
thereafter is generally available to and known by the public (other than as a
result of a disclosure directly or

                                      -56-

<PAGE>


indirectly by a party, its Affiliate or its Representatives), (ii) was available
to a party on a nonconfidential basis from a source other than the other party,
its Affiliate or Representatives, provided that such source is not and was not
directly or indirectly bound by a confidentiality agreement with the
nondisclosing party, its Affiliate or Representatives with respect to that
information, or (iii) has been independently acquired or developed by the other
party, its Affiliate or Representatives, without violating any obligations under
this agreement, that certain Confidentiality Agreement between the parties dated
as of April 18, 1995 or that certain Confidentiality Agreement between the
parties dated as of January 24, 1996.

     (c) For a period of five years after the Closing Date, Buyer will preserve
and retain the books and records of each Subsidiary and make such books and
records available at the then current administrative headquarters of Buyer to
Seller and its officers, employees and agents, upon reasonable notice and at
reasonable times, at Seller's cost and expense, it being understood that Seller
shall be entitled to make copies of any such books and records as shall be
reasonably necessary.

     Section 10.3 Expenses. Buyer and Seller shall pay their own respective
expenses, including the fees and disbursements of their respective counsel in
connection with the negotiation, preparation and execution of this Agreement and
the consummation of the transactions contemplated herein. Seller shall be solely
responsible for paying all fees and expenses of Raymond James & Associates.

     Section 10.4 Entire Agreement. This Agreement, including all schedules and
exhibits hereto, constitutes the entire agreement of the parties and supersedes
any prior oral or written agreements with respect to the subject matter hereof,
and may not be modified, amended or

                                      -57-

<PAGE>


terminated except by a written instrument specifically referring to this
Agreement signed by all the parties hereto.

     Section 10.5 Waivers and Consents. All waivers and consents given hereunder
shall be in writing. No waiver by any party hereto of any breach or anticipated
breach of any provision hereof by any other party shall be deemed a waiver of
any other contemporaneous, preceding or succeeding breach or anticipated breach,
whether or not similar.

     Section 10.6 Notices. All notices and other communications hereunder shall
be in writing and shall be deemed to have been received only if and when (a)
personally delivered (b) if mailed, on the third day after mailing, by United
States mail, first class, postage prepaid, by certified mail, return receipt
requested, addressed in each case as follows (or to such other address as may be
specified by like notice) or (c) delivered by overnight courier or facsimile:

                    (i)      if to Buyer, to:
                                   NDE Environmental Corporation
                                   8900 Shoal Creek Blvd.
                                   Bldg. 200
                                   Austin, Texas 78758
                                   P.O. Box 140795
                                   Austin, Texas 78714
                                   Facsimile: 512-459-1459
                                   Attention: President

                    (ii)     if to Seller, to:

                                   Tanknology Environmental, Inc.
                                   5225 Hollister Street
                                   Houston, Texas 77040-6294
                                   Facsimile: 713-895-6022
                                   Attention: President

     Section 10.7 Successors and Assigns. This Agreement shall be binding upon
and shall inure to the benefit of the parties hereto and their respective
successors, legal

                                      -58-

<PAGE>


representatives   and  assigns.  No  third  party  shall  have  any  rights
hereunder. No assignment shall release the assigning party.

     Section 10.8 Performance. Seller agrees to cause each Subsidiary to perform
all its obligations and agreements under this Agreement and hereby guarantees
performance by each Subsidiary of all such obligations and agreements.

     Section 10.9 Choice of Law; Section Headings; Table of Contents. This
Agreement shall be governed by the internal laws of the State of Texas (without
regard to the choice of law provisions thereof). The section headings and any
table of contents contained in this Agreement are for reference purposes only
and shall not affect the meaning or interpretation of this Agreement.

     Section 10.10 Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original and all of which
together shall be deemed to be one and the same instrument.

     Section 10.11 Jurisdiction and Venue. Seller and Buyer hereby consent to
personal jurisdiction in any action brought with respect to this Agreement and
the transactions contemplated hereunder in any federal or state court in Harris
County, Texas and agree that service of process may be accomplished pursuant to
Section 10.6 above.

     Section 10.12 Severability. The invalidity or unenforceability of any
provision of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement which shall remain in full force and
effect.

     Section 10.13 Assignment. This Agreement and each party's rights hereunder
may not be assigned without the prior written consent of the other parties;
provided that no such consent shall be required by Buyer or Seller to assign all
or part of its rights to a subsidiary

                                      -59-

<PAGE>


or Affiliate but no such assignment shall relieve the assigning party of any of
its obligations under this Agreement.


                                      -60-

<PAGE>



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

                         NDE ENVIRONMENTAL CORPORATION



                         By:
                              Name:
                              Title:


                         TANKNOLOGY ENVIRONMENTAL, INC.



                         By:
                              Name:
                              Title:




                                      -61-
<PAGE>




                 TANKNOLOGY ENVIRONMENTAL, INC. AND SUBSIDIARIES



                                   EXHIBIT 28

                                  Press Release



                                    Page 75

<PAGE>

For Immediate Release:


             "TANKNOLOGY COMPLETES SALE OF TANK TESTING BUSINESSES"


     Houston, Texas (October 25, 1996)--Tanknology Environmental,  Inc. (NASDAQ:
"TANK")  today   announced  that  it  has  completed  the  sale  of  its  three
subsidiaries  involved in  underground  storage tank services to NDE  Environmen
tal,  Inc.  The sale price  consisted  of a cash  payment of  approximately  $12
million.

     "This sale allows Tanknology to monetize its investment in the tank testing
business,"  stated Donald R. Campbell,  President.  "After the sale, the company
has cash and  marketable  securities  of  approximately  $30 million  ($2.11 per
share) and  shareholder's  equity in excess of $41 million  ($2.90 per  share),"
continued Mr. Campbell.

     Tanknology's continuing operations consist of Energy Recovery Resources, a
wastewater and waste oil treatment company located in Charlotte, North Carolina.
The Company also owns Engineered Systems, Inc., ("ESI") a provider of fuel
system products based in Tempe, Arizona. The Company treats its investment in
ESI as a discontinued operation.

     Tanknology Environmental,  Inc. is headquartered in Houston, Texas, and its
shares are traded on NASDAQ'S  National  Market  System under the ticker  symbol
"TANK."



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