MET PRO CORP
8-K, 1998-11-13
INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFING EQUIP
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<PAGE>
================================================================================


                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                               ------------------

                                    FORM 8-K

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

        DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED) OCTOBER 29, 1998


                               MET-PRO CORPORATION                              
- --------------------------------------------------------------------------------
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)


        DELAWARE                       001-07763                 23-1683282     
- --------------------------------------------------------------------------------
STATE OR OTHER JURISDICTION           (COMMISSION              (IRS EMPLOYER
   OF INCORPORATION)                  FILE NUMBER)           IDENTIFICATION NO.)

160 CASSELL ROAD, HARLEYSVILLE, PA                                 19438        
- --------------------------------------------------------------------------------
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                         (ZIP CODE)


REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE           215-723-6751       
                                                  ------------------------------

================================================================================
<PAGE>





ITEM 2.           ACQUISITION OR DISPOSITION OF ASSETS.


ON  OCTOBER  29,  1998,  MET-PRO  CORPORATION,   TOGETHER  WITH  A  WHOLLY-OWNED
SUBSIDIARY  INCORPORATED  AS  AN  ONTARIO  (CANADA)  CORPORATION   (COLLECTIVELY
"REGISTRANT"),  COMPLETED  THE  ACQUISITION  OF ALL OF THE  OPERATING  ASSETS OF
FLEX-KLEEN CORPORATION, A DELAWARE CORPORATION,  AND FLEX-KLEEN CANADA, LTD., AN
ONTARIO (CANADA) CORPORATION  (COLLECTIVELY  "FLEX-KLEEN")  PURSUANT TO AN ASSET
ACQUISITION  AGREEMENT TO WHICH  FLEX-KLEEN'S  AFFILIATES,  AQUA ALLIANCE,  INC.
(FORMERLY  KNOWN AS AIR & WATER  TECHNOLOGIES,  INC.) AND AWT AIR COMPANY,  INC.
(FORMERLY KNOWN AS RESEARCH COTTRELL, INC.) ARE ALSO PARTY.

FLEX-KLEEN IS A LEADING  SUPPLIER OF DRY  PARTICULATE  COLLECTORS  THAT ARE USED
PRIMARILY IN THE PROCESS OF  MANUFACTURING  FOOD  PRODUCTS AND  PHARMACEUTICALS.
REGISTRANT DOES NOT EXPECT TO MAKE ANY IMMEDIATE SIGNIFICANT OPERATIONAL CHANGES
IN FLEX-KLEEN'S OPERATIONS.

THE  CONSIDERATION  PAID BY REGISTRANT WAS  $15,000,000,  PLUS THE ASSUMPTION OF
ORDINARY  BUSINESS   LIABILITIES.   THE  SOURCE  OF  SUCH  CONSIDERATION  WAS  A
$12,000,000  LOAN FROM MELLON  BANK,  N. A., WITH THE  BALANCE  BEING  FUNDED BY
REGISTRANT'S CASH ON HAND.

ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.
                              ---------

(A)      FINANCIAL STATEMENTS OF BUSINESSES ACQUIRED.

FINANCIAL  STATEMENTS OF FLEX-KLEEN  FOR THE YEAR ENDED OCTOBER 31, 1997 AND THE
NINE MONTHS ENDED JULY 31, 1998 ARE INCLUDED HEREWITH.

(B)      PRO FORMA FINANCIAL INFORMATION.
         --------------------------------

REGISTRANT SHALL FILE BY AMENDMENT THE PRO FORMA FINANCIAL  INFORMATION REQUIRED
BY THIS  ITEM 7(B) OF FORM 8-K NOT  LATER  THAN 60 DAYS  AFTER THE DATE THAT THE
INITIAL REPORT ON FORM 8-K MUST BE FILED.

(C)      EXHIBITS.
         ---------

EXHIBIT NO.                               DESCRIPTION
- -----------                               -----------

     2         ASSET  PURCHASE  AGREEMENT  DATED AS OF  OCTOBER  29,  1998 AMONG
               FLEX-KLEEN   CORPORATION,   FLEX-KLEEN  CANADA,   LIMITED,   AQUA
               ALLIANCE,  INC., AWT AIR COMPANY,  INC.,  1321249 ONTARIO LIMITED
               AND MET-PRO CORPORATION

          





<PAGE>







                                   SIGNATURES


         PURSUANT TO THE  REQUIREMENTS  OF THE SECURITIES  EXCHANGE ACT OF 1934,
THE  REGISTRANT  HAS DULY  CAUSED  THIS REPORT TO BE SIGNED ON ITS BEHALF BY THE
UNDERSIGNED THEREUNTO DULY AUTHORIZED.


DATE: NOVEMBER 13, 1998
                                                MET-PRO CORPORATION



                                                BY:/s/ William L. Kacin
                                                   ---------------------------
                                                   WILLIAM L. KACIN, PRESIDENT




<PAGE>



ITEM 7. (A) FINANCIAL STATEMENTS OF BUSINESSES ACQUIRED









                             FLEX-KLEEN CORPORATION

                                FINANCIAL REPORT

                       JULY 31, 1998 AND OCTOBER 31, 1997






































<PAGE>



                                    CONTENTS

- --------------------------------------------------------------------------------
INDEPENDENT AUDITOR'S REPORT                                               1
- --------------------------------------------------------------------------------


FINANCIAL STATEMENTS

Combined balance sheets                                                    2

Combined statements of operations                                          3

Combined statements of stockholder's equity                                4

Combined statements of cash flows                                          5

Notes to combined financial statements                                  6-10

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












<PAGE>











                          INDEPENDENT AUDITOR'S REPORT


To the Stockholder and Board of Directors
Flex-Kleen Corporation
Itasca, Illinois

We  have  audited  the  accompanying  combined  balance  sheets  of  Flex-Kleen
Corporation and Flex-Kleen Canada, Ltd. (both wholly-owned subsidiaries of Air &
Water Technologies Corporation and collectively referred to hereinafter as Flex-
Kleen  Corporation)  as of July 31, 1998 and October 31,  1997,  and the related
combined statements of operations,  stockholder's  equity and cash flows for the
nine months  ended July 31,  1998 and the year ended  October  31,  1997.  These
financial  statements are the  responsibility of the Company's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material  respects,  the financial  position of Flex-Kleen Corporation as of
July 31, 1998 and October  31,  1997 and the results of its  operations  and its
cash flows for the nine months and year then ended, in conformity with generally
accepted accounting principles.


/s/ McGladrey & Pullen, LLP
- ---------------------------
New York, New York
September 18, 1998









                                        1

<PAGE>




FLEX-KLEEN CORPORATION

COMBINED BALANCE SHEETS
July 31, 1998 and October 31, 1997
<TABLE>
<CAPTION>


                                                                        July 31,              October 31,
                                                                         1998                   1998
- -------------------------------------------------------------------------------------------------------------------

<S>                                                                 <C>                       <C>    
ASSETS (Note 7)
Current Assets
Cash                                                                $           -             $    16,000
Accounts receivable (less allowance for doubtful
  accounts 1998 - $61,000; 1997 - $80,000)                              2,359,000               4,055,000
Inventories                                                             1,745,000               1,503,000
Prepaid expenses and other                                                 30,000                  46,000
                                                                    --------------            ------------
                         Total current assets                           4,134,000               5,620,000

Machinery and Equipment, net                                              240,000                 273,000
Related Party Receivables                                               1,305,000               2,312,000
                                                                    --------------            ------------
                                                                    $   5,679,000             $ 8,205,000
                                                                    ==============            ============


LIABILITIES AND STOCKHOLDER'S EQUITY
Current Liabilities
  Accounts payable                                                  $   2,142,000             $ 3,149,000
  Employee compensation related payables                                  404,000                 548,000
  Other accrued expenses                                                  153,000                 322,000
  Income taxes payable                                                     36,000                  74,000
                                                                    --------------            ------------
                         Total current liabilities                      2,735,000               4,093,000
                                                                    --------------            ------------

Related Party Payables                                                  1,108,000               1,024,000
                                                                    --------------            ------------

Stockholder's Equity
  Common stock - $100 par value; 2,000                                    200,000                 200,000
  shares authorized, issued and outstanding
Additional paid-in-capital                                              1,715,000               2,930,000
Retained earnings                                                              -                       -
Cumulative currency translation adjustment                                (79,000)                (42,000)
                                                                    --------------           -------------
                         Total stockholder's equity                     1,836,000               3,088,000
                                                                    --------------           -------------
                                                                       $5,679,000              $8,205,000
                                                                    ==============           =============
</TABLE>




See Notes to Financial Statements.




                                        2

<PAGE>




FLEX-KLEEN CORPORATION

COMBINED STATEMENTS OF OPERATIONS
For the Nine Months Ended July 31, 1998 and the Year Ended October 31, 1997
<TABLE>
<CAPTION>

                                                                          1998                    1997    
- ----------------------------------------------------------------------------------------------------------------------

<S>                                                                    <C>                     <C>        
Sales, net                                                             $13,331,000             $19,396,000

Cost of Sales                                                            8,460,000              12,895,000
                                                                       ------------            ------------

                         Gross profit                                    4,871,000               6,501,000

Selling, General and Administrative Expenses                             3,025,000               3,999,000

Depreciation and Amortization                                               59,000                  74,000
                                                                       ------------            ------------

                         Operating income                                1,787,000               2,428,000

Other Expense                                                               91,000                 134,000
                                                                       ------------            ------------

                         Income before income tax provision              1,696,000               2,294,000

Federal and state income taxes                                             650,000                 793,000
                                                                       ------------            ------------

                         Net income                                    $ 1,046,000             $ 1,501,000
                                                                       ============            ============
</TABLE>






See Notes to Financial Statements.

















                                        3

<PAGE>



FLEX-KLEEN CORPORATION

COMBINED STATEMENTS OF  STOCKHOLDER's EQUITY
For the Nine Months Ended July 31, 1998 and the Year Ended October 31, 1997


<TABLE>
<CAPTION>

                                                                                                      Cumulative
                                                               Additional                              Currency
                                   Common Stock                 Paid-In           Retained            Translation
                                 Shares       Amount            Capital           Earnings            Adjustment           Total
                           ---------------------------------------------------------------------------------------------------------
<S>                              <C>         <C>               <C>               <C>                  <C>              <C>
Balance, October
   31, 1996                      2,000       $ 200,000         $ 3,889,000       $      66,000        $   (17,000)     $  4,138,000

Net Income                           -               -                               1,501,000                  -         1,501,000

Net transfers to parent              -               -            (959,000)         (1,567,000)                 -        (2,526,000)

Currency translation                                                                                    
     adjustment                      -               -                   -                   -            (25,000)          (25,000)
                            --------------------------------------------------------------------------------------------------------
Balance, October                                                                                       
   31, 1997                      2,000         200,000           2,930,000                   -            (42,000)        3,088,000

Net income                           -               -                   -           1,046,000                  -         1,046,000

Net transfers to parent              -               -          (1,215,000)         (1,046,000)                 -        (2,261,000)

Currency translation                 -               -                   -                   -            (37,000)          (37,000)
adjustment
                            --------------------------------------------------------------------------------------------------------
Balance July 31,
1998                             2,000       $ 200,000         $ 1,715,000       $           -        $   (79,000)     $  1,836,000
                            ========================================================================================================
</TABLE>





         See Notes to Financial Statements.


                                        4

<PAGE>



FLEX-KLEEN CORPORATION

COMBINED STATEMENTS OF CASH FLOWS
For the Nine Months Ended July 31, 1998 and the Year Ended October 31, 1997
<TABLE>
<CAPTION>

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

                                                                                             1998                    1997     
                                                                                        --------------------------------------
<S>                                                                                        <C>                    <C>    
Cash Flows From Operating Activities
  Net income                                                                               $ 1,046,000            $ 1,501,000
  Adjustments to reconcile net income to net cash provided by
     operating activities:
     Depreciation and amortization                                                              59,000                 74,000
     (Increase) decrease in assets:
        Accounts receivable                                                                  1,696,000                360,000
        Inventories                                                                           (242,000)               (49,000)
        Prepaid expenses and other                                                              16,000                 35,000
        Related party receivables/payables                                                   1,091,000                492,000
      Increase (decrease) in liabilities:
        Accounts payable                                                                    (1,007,000)               535,000
        Employee compensation related payables                                                (144,000)               (14,000)
        Other accrued expenses                                                                (169,000)              (231,000)
        Income taxes                                                                           (38,000)               (83,000)
                                                                                           ------------           ------------
            Net cash provided by
              operating activities                                                           2,308,000              2,620,000 
                                                                                           ------------           ------------

Cash Flows From Investing Activities
  Purchase of machinery and equipment                                                          (26,000)               (53,000)
                                                                                           ------------           ------------
            Net cash (used in) investing activities                                            (26,000)               (53,000)
                                                                                           ------------           ------------

Cash Flows From Financing Activities
  Net transfers to parent                                                                   (2,261,000)            (2,526,000)
  Other                                                                                        (37,000)               (25,000)
                                                                                           ------------           ------------
            Net cash (used in)
            financing activities                                                            (2,298,000)            (2,551,000)
                                                                                           ------------           ------------

            Net  (decrease) increase in cash                                                   (16,000)                16,000

Cash
  Beginning of period                                                                           16,000                      -   
                                                                                          -------------           ------------
  End of period                                                                           $          -            $    16,000       
                                                                                          =============           ============

Supplemental Disclosures of Cash Flow Information
  Cash paid for income taxes                                                              $     44,000            $     8,000
                                                                                          =============           ============


</TABLE>

See Notes to Financial Statements.



                                        5

<PAGE>



FLEX-KLEEN CORPORATION

NOTES TO FINANCIAL STATEMENTS                                                   

     Note 1. Basis of Presentation

     The  accompanying  combined  financial  statements  include the accounts of
     Flex-Kleen   Corporation,   a  Delaware   corporation  and  a  wholly-owned
     subsidiary of AWT Air Company ("AWT Air"),  a New Jersey  corporation,  and
     Flex-Kleen  Canada,   Ltd.,  a  Canadian  corporation  and  a  wholly-owned
     subsidiary of AWT Air.  Hereafter,  Flex-Kleen  Corporation and Flex- Kleen
     Canada, Ltd. are referred to collectively as "Flex-Kleen" or "the Company".
     AWT Air is wholly-owned by Air & Water Technologies Corporation (AWT).

     All  significant   inter-company   transactions   and  balances  have  been
     eliminated in the preparation of these combined financial statements.

     Note 2. Nature of Business and Summary of Significant  Accounting  Policies
    
     Nature of Business:

          Flex-Kleen services customers throughout the United States and Canada,
          providing  industrial air pollution and filtration devices and related
          parts to its customers.

          The  following is a summary of the  Company's  significant  accounting
          policies:

     Revenue recognition

          The Company  recognizes revenue when goods are shipped and when repair
          and maintenance services are performed.

     Inventories:

          Inventories  are stated  principally  at the lower of cost  (first in,
          first out method) or market and consist  primarily of  components  and
          parts.

     Machinery and equipment:

          Machinery   and  equipment  is  stated  at  cost.   Depreciation   and
          amortization  of machinery and equipment is primarily  computed on the
          straight-line  method over the  estimated  useful lives of the assets.
          The  estimated  useful lives are  generally 5 to 10 years.  Repair and
          maintenance  costs  are  expensed  as  incurred;  major  renewals  and
          betterments are capitalized.  Machinery and equipment at July 31, 1998
          and October 31, 1997 consists of the following:

<TABLE>
<CAPTION>
                                                                              1998                   1997    
                                                                          ------------            -----------
<S>                                                                       <C>                     <C>  
     Machinery and equipment                                              $   144,000             $  130,000
     Computer equipment                                                       459,000                463,000 
                                                                          ------------            -----------
                                                                              603,000                593,000
     Less: accumulated depreciation and amortization                         (363,000)              (320,000)
                                                                          ------------            -----------
                                                                          $   240,000             $  273,000 
                                                                          ============            ===========
</TABLE>


                                        6

<PAGE>



FLEX-KLEEN CORPORATION

NOTES TO FINANCIAL STATEMENTS                                                   

     Note 2. Nature Of Business and Summary of Significant  Accounting  Policies
            (continued)

     Income taxes:

          The Company  files a federal  consolidated  tax return with its parent
          corporation AWT and subsidiaries. Accordingly, income taxes payable to
          (refundable  from) the tax authorities are recognized on the financial
          statements of AWT as the taxpayer for income tax purposes. The members
          of the consolidated  group allocate tax payments to all members of the
          group for the income tax reduction resulting from a member's inclusion
          in the consolidated  return,  or, the member makes payments to AWT for
          its allocated  share of the  consolidated  income tax liability.  This
          allocation  represents the liability or benefit that would be reported
          if the Company was separately filing its tax return(s).  The result of
          these allocations increases or reduces the amounts due to or from AWT.

          The Company in accordance with FASB 109 recognizes deferred tax assets
          on deductible  temporary  differences  and deferred tax liabilities on
          taxable   temporary   differences.   Temporary   differences  are  the
          differences between the reported amounts of assets and liabilities and
          their tax bases. As those  differences  reverse,  they will enter into
          the   determination   of  future  taxable   income   included  in  the
          consolidated  tax  returns.  Deferred  tax  assets  are  reduced  by a
          valuation  allowance  when, in the opinion of  management,  it is more
          likely than not that some  portion or all of the  deferred  tax assets
          will not be realized. Deferred tax assets and liabilities are adjusted
          for the  effects  of  changes  in tax  laws  and  rates on the date of
          enactment. For these financial statements,  the deferred tax effect is
          recorded as a component of amounts due to or from AWT.

     Use of accounting estimates:

          The  preparation of financial  statements in conformity with generally
          accepted  accounting  principles requires management to make estimates
          and  assumptions  that  affect  the  reported  amounts  of assets  and
          liabilities  and  disclosures of contingent  assets and liabilities at
          the date of the  financial  statements  and the  reported  amounts  of
          revenues and expenses  during the  reporting  period.  Actual  results
          could differ from those estimates.

     Note 3. Related Party Transactions

     Net cash transfers to AWT:

          As noted earlier, the Company is a wholly-owned  subsidiary of AWT. As
          part of the cash needs management system of AWT, all available cash is
          swept from the  Company's  accounts on a regular  updated  basis.  The
          Company  processes  payments through bank accounts which are funded by
          AWT as checks are presented.  The net cash transfers to AWT during the
          year ended  October 31,  1997 and the nine months  ended July 31, 1998
          were  approximately  $2,526,000 and  $2,261,000,  respectively.  These
          amounts  have been  reflected  as a reduction  in  available  retained
          earnings and additional  paid-in-capital in the accompanying  combined
          financial statements.




                                       7

<PAGE>



FLEX-KLEEN CORPORATION

NOTES TO FINANCIAL STATEMENTS                                                   

     Note 3. Related Party Transactions (continued)

     Allocation of Shared Expenses:

          AWT  regularly  incurs  and pays  certain  expenses  on the  Company's
          behalf.  All costs applicable to the Company have been included in the
          accompanying  statements of operations.  Certain  common  expenses and
          expenses  incremental and  proportional  to the Company's  operations,
          such  as  marketing,  human  resources,  information  system  support,
          clerical  and  other   administrative   support  as  well  as  certain
          managerial  and other  costs,  have been  allocated to the Company and
          included in the accompanying statements of operations. The allocations
          to the Company are based on various factors,  including  percentage of
          revenue and expenses and number of employees which, in the judgment of
          management who control both AWT and the Company, are reasonable.

          General and administrative costs allocated to the Company for the nine
          months  ended July 31,  1998 and the year ended  October 31, 1997 were
          $266,000 and $508,000, respectively.

          Management  believes  the costs that would have been  incurred had the
          Company  existed on a stand alone basis would not have been materially
          different  than  the  costs  reflected  in the  accompanying  combined
          statements of operations.

     Other

          Related party  receivables and payables  represent amounts due from or
          to other AWT  subsidiaries  and  affiliates for goods and services and
          facility use exchanged by the Company and the related companies. There
          currently  exists no scheduled  repayment terms for these amounts and,
          accordingly,   they  have  been   classified   as   long-term  in  the
          accompanying financial statements.


     Note 4. Benefit Plans

     AWT maintains  savings and retirement  plans in which the Company matches a
     fixed  percentage of each employee's  contribution up to a maximum of 4% of
     such   employee's   compensation.   One  plan  also   provides  for  annual
     discretionary  Company  contributions  which  are  fixed  by the  Board  of
     Directors  based on the  performance of the  applicable  employee group for
     certain eligible employees. The expense charged to operations applicable to
     these plans was approximately $99,000 and $78,000 for the nine months ended
     July 31, 1998 and the year ended October 31, 1997, respectively.

     Note 5. Income Taxes

     The federal and state income tax  provision  (benefit)  for the nine months
     ended July 31,  1998 and the year ended  October  31,  1997  consist of the
     following:

<TABLE>
<CAPTION>

Current                                 1998                  1997   
                                    -------------         -------------
<S>                                 <C>                   <C>        
  Federal                           $    605,000          $    741,000
  State                                    8,000               (75,000)
Deferred
  Federal                                 37,000               127,000
  State                                        -                     -   
                                    -------------         -------------
                                    $    650,000          $    793,000 
                                    =============         =============

</TABLE>

                                        8

<PAGE>



FLEX-KLEEN CORPORATION

NOTES TO FINANCIAL STATEMENTS                                                   

     Note 5. Income Taxes (continued)

     The  difference  between the income tax provision  computed by applying the
     statutory  federal  income tax rate to the pretax income and the actual tax
     provision is as follows:
<TABLE>
<CAPTION>

                                        1998                 1997    
                                    -------------        -------------
<S>                                 <C>                  <C>        
Statutory provision                 $    577,000         $    780,000
State income taxes                        17,000               13,000
Impact of foreign operations              11,000               11,000
Non-deductible expenses                   31,000               45,000
Other                                     14,000              (56,000)  
                                    -------------        -------------
                                    $    650,000         $    793,000   
                                    =============        =============
</TABLE>


     Note 6. Subsequent Event

     On August 12, 1998,  AWT signed a letter of intent  which  provides for the
     sale of substantially all of the assets and assumption of substantially all
     of the liabilities of the Company for total  consideration of approximately
     $15 million.

     Note 7. Commitment and Contingencies

     The  Company  is party to  various  lease  agreements  for  facilities  and
     warehouses.  Rent  expense for the nine months  ended July 31, 1998 and the
     year ended October 31, 1997 was $365,000 and $650,000, respectively. Future
     minimum  obligations  under  noncancellable  leases with original  terms in
     excess of one year are as follows:

<TABLE>
<CAPTION>

                           Years Ended
                           October                  Amount    
                           -----------          ------------
<S>                          <C>                <C>            
                             1999               $   215,000
                             2000                   222,000
                             2001                   209,000
                             2002                   200,000
                             2003                    33,000
                           Thereafter           ------------
                                                $   879,000
                                                ============
</TABLE>

          In   connection   with   certain   financing   transactions   of  AWT,
          substantially all of the assets of the Company are pledged.


     Note 8. Recently Issued Accounting Pronouncements

     Under  Statement of Financial  Accounting  Standards  No. 130 issued by the
     Financial  Accounting  Standards  Board in June 1997,  the Company  will be
     required to display components of both net income and comprehensive  income
     on the  face of the  financial  statements  along  with  the  corresponding
     earnings per share amount.

                                        9

<PAGE>






FLEX-KLEEN CORPORATION

NOTES TO FINANCIAL STATEMENTS                                                   

     Note 8. Recently Issued Accounting Pronouncements (continued)

          Comprehensive income is the change in equity during a period resulting
          from non-owner sources. It consists of two major items: net income and
          other  comprehensive  income.  The  most  common  components  of other
          comprehensive income include foreign currency translation adjustments,
          minimum pension liability  adjustments and unrealized gains and losses
          on available-for-sale securities.

          The  effective  date of the  statement  for the Company is fiscal 1999
          (i.e. periods beginning after December 15, 1997).

     Note 9. Year 2000 Issue

          The Year 2000 Issue relates to whether  computer systems will properly
          recognize and process date-sensitive information when the year changes
          to 2000. Systems that do not properly recognize such information could
          generate  erroneous  data or  possibly  fail.  The  Company is heavily
          dependent on computer  processing in the conduct of substantially  all
          of its business activities.  The Company has conducted a comprehensive
          review of its  computer  systems to identify the systems that could be
          affected by the Year 2000 issue and believes its critical  systems are
          Year 2000 compliant.

          The cost of  making  the  systems  Year  2000  compliant  has not been
          significant  to date. Due to the  uncertainty  regarding the direction
          and actions the buyer of the Company's  assets may take regarding Year
          2000 issues,  a reasonable  estimate of the costs that may be incurred
          to become Year 2000 compliant cannot be made.


                                       10

<PAGE>

Item 7.  (C-2)  Asset  Purchase  Agreement  dated as of October  29,  1998 among
     Flex-Kleen Corporation, Flex-Kleen Canada Limited, Aqua Alliance, Inc., AWT
     Air Company, Inc., 1321249 Ontario Limited and Met-Pro Corporation
                                                                              












                            ASSET PURCHASE AGREEMENT


                                   dated as of


                                October 29, 1998


                                      among

                             FLEX-KLEEN CORPORATION

                           FLEX-KLEEN CANADA LIMITED

                               AQUA ALLIANCE, INC.

                              AWT AIR COMPANY, INC.

                             1321249 ONTARIO LIMITED

                                       and

                               MET-PRO CORPORATION



<PAGE>

                                                     TABLE OF CONTENTS
                                                  ----------------------
<TABLE>
<CAPTION>
                                                                                                                         PAGE
                                                                                                                         ----
                                                        ARTICLE 1
                                                    PURCHASE AND SALE

<S>       <C>                                                                                                             <C> 
1.1      Purchase and Sale..............................................................................................  2
         1.1.1    Included Assets.......................................................................................  2
         1.1.2    Excluded Assets.......................................................................................  4
1.2      Purchase As Between Met-Pro and Met-Pro Canada.................................................................  5
1.3      The Purchase Price.............................................................................................  5
         1.3.1    Purchase Price........................................................................................  5
         1.3.2    Adjustment at Closing to Purchase Price...............................................................  6
         1.3.3    Payment of Purchase Price.............................................................................  6
         1.3.4    Allocation of Purchase Price..........................................................................  7
         1.3.5    Reimbursement for Cash Outlays between the Effective Date and the
                  Closing Date..........................................................................................  8
1.4      Assumption of Certain Liabilities; Excluded Liabilities........................................................ 11
         1.4.1    Assumed Liabilities................................................................................... 11
         1.4.2    Excluded Liabilities.................................................................................. 12

                                                        ARTICLE 2
                      CLOSING, ITEMS TO BE DELIVERED, THIRD PARTY CONSENTS, CHANGES IN NAME, FURTHER
                                              ASSURANCES AND EFFECTIVE DATE

2.1      Closing........................................................................................................ 14
2.2      Items to be Delivered at Closing............................................................................... 14
2.3      Third Party Consents........................................................................................... 16
2.4      Changes in Name................................................................................................ 16
2.5      Further Assurances............................................................................................. 17
2.6      Effective Date................................................................................................. 17

                                                        ARTICLE 3
                                              REPRESENTATIONS AND WARRANTIES

3.1      Representations and Warranties of the Sellers.................................................................. 17
         3.1.1    Corporate Existence................................................................................... 17
         3.1.2    Corporate Power; Authorization; Enforceable Obligations............................................... 18
         3.1.3    No Interest in Other Entities......................................................................... 18
         3.1.4    Validity of Contemplated Transactions, etc............................................................ 18
         3.1.5    No Third Party Options................................................................................ 19
         3.1.6    Financial Statements.................................................................................. 19
</TABLE>



                                                            i

<PAGE>

<TABLE>
<CAPTION>

                                                                                                                        PAGE
                                                                                                                        ----


<S>     <C>                                                                                                              <C>

         3.1.7    Absence of Undisclosed Liabilities.................................................................... 20
         3.1.8    Property of Others; Location of Assets................................................................ 20
         3.1.9    Transactions With Affiliates.......................................................................... 20
         3.1.10   Existing Condition.................................................................................... 21
         3.1.11   Title to Properties................................................................................... 22
         3.1.12   Compliance with Law; Authorizations................................................................... 22
         3.1.13   Litigation............................................................................................ 23
         3.1.14   Insurance............................................................................................. 23
         3.1.15   Contracts and Commitments............................................................................. 24
         3.1.16   Additional Information................................................................................ 25
         3.1.17   Labor Matters......................................................................................... 26
         3.1.18   Employee Benefit Plans and Arrangements............................................................... 26
         3.1.19   Intellectual Property Matters......................................................................... 26
         3.1.20   Environmental Matters................................................................................. 27
         3.1.21   Real Property......................................................................................... 28
         3.1.22   Availability of Documents............................................................................. 29
         3.1.23   Assets................................................................................................ 29
         3.1.24   Conditions Affecting Sellers.......................................................................... 29
         3.1.25   Warranty Costs........................................................................................ 30
         3.1.26   Flex-Kleen Canada..................................................................................... 30
3.2      Representations and Warranties of Purchasers................................................................... 30
         3.2.1    Corporate Existence................................................................................... 30
         3.2.2    Corporate Power and Authorization..................................................................... 31
         3.2.3    Validity of Contemplated Transactions, etc............................................................ 31
         3.2.4    Met-Pro Canada........................................................................................ 31
         3.2.5    No Other Representations.............................................................................. 31
3.3      Survival of Representations and Warranties..................................................................... 32

                                                        ARTICLE 4
                                                     INDEMNIFICATION

4.1      Indemnification by Sellers and Shareholders.................................................................... 33
         4.1.1    Indemnification by Sellers and Shareholders........................................................... 33
         4.1.2    Limitation on Sellers' and Shareholders' Liability for Breaches of
                  Representations and Warranties........................................................................ 33
         4.1.3    Liability for Breach of Covenant and Excluded Liabilities............................................. 33
4.2      Indemnification by Purchasers.................................................................................. 34
4.3      Method of Asserting Claims, etc................................................................................ 34
4.4      Payment........................................................................................................ 38
4.5      Arbitration.................................................................................................... 39
4.6      Compliance with Bulk Sales Laws................................................................................ 40
</TABLE>



                                                            ii

<PAGE>

<TABLE>
<CAPTION>

                                                                                                                        PAGE
                                                                                                                        ----


<S>     <C>                                                                                                             <C>   
4.7      Calculation of Damages......................................................................................... 40
4.8      Exclusive Remedy............................................................................................... 41
4.9      Goods and Services Gross-up On Indemnification................................................................. 41

                                                        ARTICLE 5
                                                 EMPLOYEE BENEFIT MATTERS

5.1      Employees and Offers of Employment............................................................................. 41
5.2      Non-Solicitation............................................................................................... 42
5.3      Vacation Credit................................................................................................ 43
5.4      COBRA.......................................................................................................... 43
5.5      Health Care and Prescription Benefits; Other Employee Benefits................................................. 43
5.6      Allocation of Liability........................................................................................ 44
5.7      Service Credit and Pre-existing Conditions..................................................................... 44
5.8      Savings Plans.................................................................................................. 45
5.9      Employee Benefit Plans......................................................................................... 45

                                                        ARTICLE 6
                                               CERTAIN POST CLOSING MATTERS

6.1      Discharge of Business Obligations.............................................................................. 46
6.2      Maintenance of Books and Records; Cooperation.................................................................. 46
6.3      Payments Received.............................................................................................. 47
6.4      Use of Name.................................................................................................... 47
6.5      UCC Matters.................................................................................................... 48
6.6      Covenant Not to Compete........................................................................................ 48
6.7      Contracting of Non-Assignable Customer Contracts............................................................... 49
6.8      Auditor's Consent.............................................................................................. 49
6.9      Right to Use Network in Connection with EMS Accounting System.................................................. 49
6.10     Transfer of Permits............................................................................................ 49
6.11     Insurance...................................................................................................... 49
6.12     Straddle Taxes................................................................................................. 50
6.13     Income Tax; Financial Reporting................................................................................ 50

                                                        ARTICLE 7
                                                      MISCELLANEOUS

7.1      Brokers' and Finders' Fees..................................................................................... 51
7.2      Sales, Transfer and Documentary Taxes, etc..................................................................... 52
7.3      Expenses....................................................................................................... 52
7.4      Contents of Agreement; Parties in Interest; etc................................................................ 52
</TABLE>




                                                           iii

<PAGE>

<TABLE>
<CAPTION>

                                                                                                                        PAGE
                                                                                                                        ----


<S>     <C>                                                                                                              <C>  

7.5      Assignment..................................................................................................... 53
7.6      Amendments and Waiver.......................................................................................... 53
7.7      Notices........................................................................................................ 53
7.8      Delaware Law to Govern......................................................................................... 54
7.9      No Benefit to Others........................................................................................... 54
7.10     Headings, Gender, "Person" and Certain Definitions............................................................. 54
7.11     Schedules and Exhibits......................................................................................... 55
7.12     Severability................................................................................................... 55
7.13     Counterparts................................................................................................... 55
7.14     Waiver of Jury Trial........................................................................................... 55
7.15     Guarantee...................................................................................................... 55


</TABLE>

                                                            iv

<PAGE>






          ASSET PURCHASE  AGREEMENT,  dated as of October 29, 1998, by and among
     FLEX-KLEEN  CORPORATION,  a Delaware  corporation  ("Flex-Kleen"),  AWT AIR
     COMPANY,  INC.,  a New  Jersey  corporation  and the  sole  shareholder  of
     Flex-Kleen ("AWT Air"),  FLEX-KLEEN  CANADA,  LIMITED,  an Ontario,  Canada
     corporation  that  is an  indirect,  wholly-owned  subsidiary  of  AWT  Air
     ("Flex-Kleen   Canada")  (Flex-Kleen  and  Flex-Kleen  Canada  referred  to
     collectively  as  the  "Sellers"  and  individually  as a  "Seller"),  AQUA
     ALLIANCE,  INC., a Delaware corporation and the sole shareholder of AWT Air
     ("Aqua  Alliance")  (AWT Air and Aqua Alliance  referred to collectively as
     the  "Shareholders"  and  individually  as a  "Shareholder"),  and  MET-PRO
     CORPORATION,  a  Delaware  corporation  ("Met-Pro"),  and  1321249  ONTARIO
     LIMITED, an Ontario corporation whose sole shareholder is Met-Pro ("Met-Pro
     Canada")  (Met-Pro  and  Met-Pro  Canada  referred to  collectively  as the
     "Purchasers" and individually as a "Purchaser").

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




          Sellers are engaged in the business of designing,  manufacturing on an
     out-sourced   contract  basis,  and  distributing  and  selling  worldwide,
     equipment and products used in the collection of dry dust  particulate from
     various gas streams,  including fabric filter dust collectors and other bag
     houses,   cartridge  dust  collectors,   compleat  dust   collectors,   and
     aftermarket  filter bags, cages,  valves and fabrications (such business as
     of July 31, 1998 hereafter referred to as the "Business").

          Shareholders  are the direct or  indirect  holders of all of  Sellers'
     issued and outstanding capital stock.

          Purchasers,  between them as set forth herein,  desire to purchase all
     of the Business of Sellers.

          Subject  only to the  limitations  and  exclusions  contained  in this
     Agreement and on the terms and conditions  hereinafter  set forth,  Sellers
     desire  to sell  and  Purchasers  desire  to  purchase  the  Business,  its
     operations, and the assets of Sellers used therein.

          NOW, THEREFORE, in consideration of the recitals and of the respective
     covenants, representations, warranties and agreements herein contained, and
     intending to be legally  bound hereby,  the parties  hereto hereby agree as
     follows:







                                        1

<PAGE>






                                    ARTICLE 1

                                Purchase and Sale

          1.1 Purchase and Sale. At the Closing hereunder (as defined in Section
     2.1 hereof) and except for the Excluded Assets (as defined by and set forth
     in Section  1.1.2  hereof),  Purchasers,  upon and subject to the terms and
     conditions  of this  Agreement  and in reliance  upon the  representations,
     warranties,  covenants and  agreements of Sellers and  Shareholders  herein
     contained, agree to purchase from Sellers, and Sellers, upon and subject to
     the  terms  and  conditions  of this  Agreement  and in  reliance  upon the
     representations,  warranties, covenants and agreements of Purchasers, agree
     to sell,  grant,  convey,  assign,  transfer and deliver to Purchasers,  as
     between  them as set forth in Section  1.2  hereof,  all  right,  title and
     interest of Sellers in and to (a) the Business as a going concern,  (b) the
     names  "FLEX-KLEEN  CORPORATION"  and  "FLEX-KLEEN  CANADA LIMITED" and all
     variations thereof and all goodwill  associated  therewith,  and (c) all of
     the assets,  properties and rights of Sellers  constituting the Business or
     used  therein,  of every kind and  description,  real,  personal and mixed,
     tangible and intangible, wherever situated (which Business, name, goodwill,
     assets,  properties and rights are herein  sometimes  called the "Assets"),
     free and  clear  of all  mortgages,  liens,  pledges,  security  interests,
     charges,  claims,  restrictions and  encumbrances of any nature  whatsoever
     (collectively  "Liens"),  except  Permitted  Liens (as  defined  in Section
     3.1.11 hereof).  In addition,  AWT Air at Closing shall assign and transfer
     to Purchasers all of its right,  title and interest in any  Confidentiality
     Agreement (as defined in Section 1.1(e) below)  executed by AWT Air and any
     employee,  consultant,  customer or vendor of Sellers;  provided,  however,
     that the foregoing shall not be deemed to preclude  Sellers or Shareholders
     from  enforcing the  provisions  of such  Confidentiality  Agreements  with
     respect to information matters or events arising on or prior to the Closing
     Date.

          1.1.1  Included  Assets.  The Assets  shall  exclude only those assets
     expressly  set forth in Section 1.1.2  hereof,  and shall  include  without
     limitation all of the tangible and intangible assets, properties and rights
     of Sellers used  directly or  indirectly in the conduct of, or generated by
     or constituting,  the Business,  both in the United States,  Canada, and in
     any other  locations,  as of the Effective  Date (as  hereafter  defined in
     Section 2.6), including, without limitation, the following:

               (a) all  machinery,  equipment,  office  equipment  and  systems,
          tools, vehicles, furniture, furnishings,  partitions, plant equipment,
          fixtures,  leasehold  improvements,  molds,  dies,  goods,  and  other
          tangible personal property;




                                        2

<PAGE>






               (b) all cash or cash equivalents of Sellers,  in transit, in hand
          or in bank accounts,  regardless of whether  maintained in the name of
          Sellers or Shareholders,  including all cash generated by the Business
          after the Effective Date;

               (c) all prepaid  items,  unbilled  costs and fees,  and accounts,
          notes and other receivables;

               (d) all  supplies,  inventories,  finished  goods,  spare  parts,
          replacement parts, materials,  raw materials,  work in process, goods,
          and  office  and  other  supplies  including  packaging  material  and
          cartons;

               (e) to the extent  permitted by applicable  law, all rights under
          any agreement,  non-disclosure  or  confidentiality  agreement (each a
          "Confidentiality  Agreement"),  Contract (as defined in Section 3.1.15
          hereof), contract,  agreement with vendors and suppliers, lease, plan,
          instrument,  registration,  license,  certificate of occupancy,  other
          permit or  approval  of any  nature,  or other  document,  commitment,
          arrangement, undertaking, practice or authorization;

               (f) all rights under any patent,  trademark,  service mark, trade
          name,   business  name,  trade  dress,  logo  or  copyright,   whether
          registered or unregistered, and any applications therefor;

               (g) all technologies,  methods,  formulations,  data bases, trade
          secrets, know-how,  inventions and other intellectual property used in
          the Business or under development;

               (h) all computer  software  including  but not limited to the EMS
          Accounting  System  (including  documentation  and related  object and
          source codes, if presently available to Sellers);

               (i) all information, files, records, documents, sales and product
          literature, advertising mechanicals and photographs,  advertising text
          and  copy,   advertising,   marketing   and   promotional   materials,
          demonstration  samples,  product  models,  and any other  usual  sales
          materials,  engineering drawings, technical data, operational manuals,
          books and records,  data,  plans,  contracts  and recorded  knowledge,
          including customer, vendor,  representative,  distributor and supplier
          lists, related to the foregoing;

               (j)  all  business   telephone  numbers  and  mailing  addresses,
          including all post office box numbers, for and owned by the Business;

                                        3

<PAGE>







               (k) all  rights or choses in action  arising  out of  occurrences
          before or after the Closing,  including without  limitation all rights
          under express or implied warranties relating to the Assets;

               (l) to the extent not covered above, all claims and rights under
         contracts,  agreements,  contract rights,  leases,  license agreements,
         franchise  rights,  policies,  purchase  and sale  orders,  quotations,
         executory commitments,  instruments, arrangements and understandings of
         Sellers to which either Seller is a party, including but not limited to
         any security deposits; and

               (m) to the extent not covered  above,  all assets and  properties
          reflected on the Effective Date Pro Forma Balance Sheet (as defined in
          Section 3.1.6 hereof).

          1.1.2 Excluded Assets. Notwithstanding the foregoing, the Assets shall
     not include any of the following  (collectively  the "Excluded  Assets" and
     each an "Excluded Asset"):

               (a) the corporate seals,  certificates of  incorporation,  minute
          books,  stock books,  tax returns,  books of account or other  records
          having to do with corporate organization of Sellers;

               (b) the rights which accrue or will accrue to Sellers  under this
          Agreement;

               (c)  the  rights  to any of  Sellers'  claims  for  any  federal,
          Canadian,  Provincial,  state,  local, or other foreign tax refunds or
          credits  relating to periods  prior to the  Effective  Date,  plus the
          rights  to  any  of  Sellers'   claims  for  any  federal,   Canadian,
          Provincial,  state,  local or other  foreign  income  tax  refunds  or
          credits relating to periods prior to the Closing Date;

               (d) any receivable or inter-company  indebtedness due from either
          of the  Shareholders or other affiliate of Sellers as of the Effective
          Date;

               (e) assets disposed of in the ordinary course of business between
          the  Effective  Date  and the  Closing  Date in  accordance  with  the
          provisions of this Agreement;

               (f) Sellers' "CARAT" accounting software;


                                        4

<PAGE>






               (g) any  insurance  policy of  Seller,  and any right of  Sellers
          under any policy of insurance,  including any proceeds payable or paid
          thereunder, for claims arising prior to the Effective Date;

               (h) any  trademark or service mark not used in the  Business,  or
          other tangible or intangible asset or right set forth on Exhibit 1.1.2
          hereof;

               (i) assets  associated  with employees or employee  benefit plans
          prior to the Closing Date;

               (j) the leases of Sellers for the facilities in Sharpsburg, North
         Carolina and Richmond Hill, Ontario;

               (k) the capital stock of Sellers;

               (l) assets of Flex-Kleen  Canada which do not primarily relate to
          the Business,  including but not limited to Flex-Kleen  Canada's right
          to payment from Stone Container (Canada), Inc; and

               (m) any asset or item set forth on Schedule 1.1.2 hereof.

          1.2 Purchase As Between  Met-Pro and Met-Pro Canada.  At Closing,  the
     Assets  shall be acquired by, and  transferred  and conveyed to, as between
     the Purchasers as follows:

               (a) all of the Assets that are used by  Flex-Kleen  Canada in the
          Business  shall be  acquired  by, and  transferred  and  conveyed  to,
          Met-Pro Canada; and

               (b)  all  other  Assets  shall  be  acquired  by,  and  shall  be
          transferred  and  conveyed  to,  Met-Pro,  except  that at or prior to
          Closing,  Met-Pro may assign its right  hereunder to any  wholly-owned
          subsidiary of Met-Pro; provided, however, that Met-Pro shall be solely
          liable for any performance  required of it hereunder,  notwithstanding
          any such assignment.

          1.3 The Purchase Price.

          1.3.1 Purchase Price. The purchase price (the "Purchase  Price") to be
     paid hereunder by Purchasers shall be in the amount of $15,000,000 (fifteen
     million  dollars)  cash,  which  amount shall be subject to  adjustment  as
     provided for by Section 1.3.2 hereof.


                                        5

<PAGE>






          1.3.2  Adjustment  at Closing to Purchase  Price.  The Purchase  Price
     shall be adjusted at Closing as follows:

               (a) The Purchase Price shall be reduced by the amount, if any, by
          which the Pro Forma Net Equity (as hereafter defined) on the Effective
          Date Pro Forma Balance Sheet is less than $2,200,000. No adjustment to
          the amount of the Purchase  Price shall be made to the extent to which
          such Pro Forma  Net  Equity on the  Effective  Date Pro Forma  Balance
          Sheet shall exceed  $2,200,000.  For purposes of this Agreement,  "Pro
          Forma Net Equity" shall mean the book value of the Assets  recorded on
          the  Effective  Date Pro  Forma  Balance  Sheet,  net of and minus the
          liabilities  recorded on the Effective  Date Pro Forma Balance  Sheet;
          and

               (b) The Purchase  Price shall be reduced by the product,  if any,
          determined  by  multiplying  (x) the  amount by which the  EBITDA  (as
          hereafter  defined)  for the  nine  months  ending  July  31,  1998 as
          determined  from the July 31,  1998  Financial  Statements  (hereafter
          defined in Section 3.1.6 hereof) is less than $1,650,000,  (y) by five
          (5). The maximum amount of reduction in the Purchase Price pursuant to
          this adjustment shall be $500,000.  No adjustment to the amount of the
          Purchase  Price  shall be made to the extent to which such  EBITDA for
          the nine months  ending  July 31, 1998 on the July 31, 1998  Financial
          Statements  shall exceed  $1,650,000.  For purposes of this Agreement,
          "EBITDA" shall mean earnings on the July 31, 1998 Financial Statements
          before interest, taxes, depreciation, and amortization,  determined in
          accordance  with  U.S.   generally  accepted   accounting   principles
          ("GAAP"), consistently applied.

               (c) The sum of the  reductions,  if any,  to the  Purchase  Price
          provided by this Section 1.3.2 shall be referred to in this  Agreement
          as the "Purchase Price Closing Adjustment."

          1.3.3 Payment of Purchase Price. On the Closing Date, Purchasers shall
     pay (i) to Sellers, on account of the Purchase Price, $14,500,000 (fourteen
     million five  hundred  thousand  dollars),  less the amount of the Purchase
     Price Closing  Adjustment (such net amount, the "Sellers Closing Payment"),
     payable by wire transfer of immediately  available funds to such account as
     Sellers  shall  designate,  and (ii) to the  Escrow  Agent  (the  costs and
     charges of which shall be shared equally  between  Sellers and  Purchasers)
     under an Escrow  Agreement  substantially  in the form  attached  hereto as
     Exhibit 1.3.3 (the "Escrow  Agreement"),  on account of the Purchase Price,
     the sum of $500,000 (five hundred  thousand  dollars) (the "Escrow  Closing
     Payment";  and  together  with the Sellers  Closing  Payment,  the "Closing
     Payment").


                                        6

<PAGE>






          1.3.4 Allocation of Purchase Price.

               (a) As soon as practicable after the Closing Date,  Sellers shall
          deliver to Purchasers a statement (the "Allocation Statement") setting
          forth the allocation of the Purchase Price, plus or minus, as the case
          may be, and to the extent  properly  taken into account  under Section
          1060 of the Internal  Revenue Code of 1986,  as amended (the  "Code"),
          the  Assumed  Liabilities,   any  Purchase  Price  Closing  Adjustment
          pursuant  to  Section  1.3.2   hereof,   and  any  Closing  Cash  Flow
          Reimbursement  Payment and any  Post-Closing  Cash Flow  Reimbursement
          Payment   pursuant  to  Sections   1.3.5(a)   and   1.3.5(b)   hereof,
          respectively,  amongst  the  Assets  and the  covenant  not to compete
          contained  in Section  6.6  hereof.  The  Allocation  Statement  shall
          reflect the  allocation  set forth on Schedule  1.3.4 hereto,  plus or
          minus any adjustments to the Purchase Price for the Post-Closing  Cash
          Flow Reimbursement  Payment (to the extent properly taken into account
          under Section 1060 of the Code).

               (b) Purchasers  shall have a period of fifteen (15) calendar days
          after the delivery of the  Allocation  Statement to present in writing
          to Seller any objections  that  Purchasers may have to the calculation
          and  allocation  set  forth  in  the  Allocation   Statement.   Unless
          Purchasers  timely object,  the Allocation  Statement shall be binding
          upon the parties without further adjustment.

               (c) If Purchasers shall raise any objections  within such fifteen
          (15) calendar day period,  Purchasers  and Sellers shall  negotiate in
          good faith and use their best efforts to resolve such dispute.  If the
          parties fail to agree within five (5) calendar days after  Purchasers'
          delivery  of their  objections,  then  each  party may  calculate  and
          allocate the Purchase Price (for purposes of Section 1060 of the Code)
          as it shall determine;  provided,  however, that the $50,000 allocated
          in  Schedule  1.3.4 to the  covenant  not to compete  provided  for in
          Section 6.6 hereof and the absence in Schedule 1.3.4 of any allocation
          to goodwill as a component  of the Assets and  Business of  Flex-Kleen
          Canada shall not vary from that provided for in Schedule 1.3.4.

               (d) If  the  Allocation  Statement  is  finally  agreed  upon  as
          provided for hereby, Sellers and Purchasers agree to (i) calculate and
          report,  and to cause their  affiliates  to calculate  and report,  an
          allocation  of such  Purchase  Price (with  adjustments  as  described
          above)  amongst the Assets and the covenant not to compete in a manner
          entirely consistent with the agreed-to Allocation Statement,  (ii) act
          in accordance  with the Allocation  Statement in the  preparation  and
          filing of all Tax returns and elections (including, without limitation
          filing Form 8594 with their Federal income Tax returns for the taxable

                                        7

<PAGE>






          year that  includes the  Effective  Date) and in the course of any Tax
          audit, Tax review or Tax litigation relating thereto and (iii) take no
          position and cause their  affiliates to take no position  inconsistent
          with the Allocation  Statement for U.S. federal and state and Canadian
          and Provincial income Tax purposes.

               (e)  Not  later  than  30  days  prior  to the  filing  of  their
          respective Forms 8594 relating to this  transaction,  each party shall
          deliver to the other party a copy of its Form 8594.

               (f) The parties  acknowledge and agree that any adjustment to the
          Allocation  Statement for the Closing Cash Flow Reimbursement  Payment
          and the Post-Closing Cash Flow Reimbursement  Payment  contemplated by
          Section 1.3.4(a) hereof is for tax reporting  purposes only, and shall
          not be considered an adjustment for financial reporting purposes,  and
          that  nothing  contained  in this  Section  1.3.4  or in  Sellers'  or
          Purchasers'  Form 8594  shall be deemed to in any way alter the intent
          or intended effect of Section 2.6 or Section 6.13(b) hereof.

          1.3.5  Reimbursement  for Cash Outlays  between the Effective Date and
     the Closing Date.

               (a) At Closing,  there shall be a reimbursement for the Cash Flow
          (as  hereafter  defined) of the Business  during the period  beginning
          with the  Effective  Date and ending on  September  25,  1998,  in the
          amount set forth on Schedule 1.3.5 hereto, payable by wire transfer of
          immediately available funds to such account as Purchasers, if the Cash
          Flow shall be a positive number, or Sellers, if the Cash Flow shall be
          a  negative   number,   shall   designate   (the  "Closing  Cash  Flow
          Reimbursement Payment").

                For purposes of this Section 1.3.5,  "Cash Flow" of the Business
         shall  mean  the  difference  obtained  by  subtracting  (i)  net  cash
         transfers, payments, contributions or infusions made by Shareholders or
         any of their  affiliates  to Sellers  which are in the nature of loans,
         capital  contributions  or similar  advances to Sellers,  from (ii) net
         cash  transfers,  payments,  distributions  or  disbursements  made  by
         Sellers to  Shareholders  or any of their  affiliates  which are in the
         nature  of loans,  dividends,  distributions  or  similar  advances  to
         Shareholders or their affiliates or withdrawals from Sellers.

               (b) After Closing,  there shall be a  reimbursement  for the Cash
          Flow of the Business during the period between  September 26, 1998 and
          ending on the Closing Date (the "Post-Closing Cash Flow Reimbursement

                                        8

<PAGE>






          Payment"), as follows:

                        (i) Within  twenty  (20)  calendar  days  following  the
                  Closing Date,  Sellers shall deliver to Purchasers a pro forma
                  unaudited  Cash Flow  statement of the Business for the period
                  beginning  with  September  26, 1998 and ending on the Closing
                  Date  (the  "Closing  Pro  Forma  Cash  Flow  Statement").  In
                  preparing the Closing Pro Forma Cash Flow  Statement,  Sellers
                  shall utilize the same procedures and methodology  utilized in
                  the   determining   the  amount  of  the  Closing   Cash  Flow
                  Reimbursement Payment reflected in Schedule 1.3.5 hereof.

                       (ii) If Purchasers  disagree  with  Sellers'  Closing Pro
                  Forma  Cash  Flow  Statement  delivered  pursuant  to  Section
                  1.3.5(b)(i)  hereof,  Purchasers  may, within twenty five (25)
                  calendar  days after  delivery  of the  Closing Pro Forma Cash
                  Flow Statement,  deliver a notice to Sellers  disagreeing with
                  such calculation and setting forth Purchasers'  calculation of
                  such amount.  Any such notice of  disagreement  shall  specify
                  those items or amounts as to which  Purchasers  disagree,  and
                  Purchasers shall be deemed to have agreed with all other items
                  and  amounts  contained  in the  Closing  Pro Forma  Cash Flow
                  Statement.

                      (iii) The "Final  Closing  Pro Forma Cash Flow  Statement"
                  shall be (A) the  Closing  Pro Forma  Cash Flow  Statement  if
                  Purchasers do not notify Sellers of any disagreement therewith
                  within such  twenty-five (25)  calendar-day  period and (B) if
                  Purchasers  notify Sellers in writing of any disagreement with
                  such Closing Pro Forma Cash Flow  Statement,  such Closing Pro
                  Forma  Cash  Flow   Statement  as  adjusted  or  corrected  in
                  accordance with the resolution of such disagreement, either by
                  agreement of Sellers or  Purchasers  or by an  internationally
                  recognized firm of independent  public accountants as to which
                  Sellers and Purchasers  shall mutually agree (the "CPA Firm"),
                  as the case may be.

                       (iv) Purchasers and Sellers shall negotiate in good faith
                  to   resolve   any   disagreements   raised   by   Purchasers'
                  disagreement  notice, but if Purchasers and Sellers are unable
                  to  resolve  all of their  disagreements  with  respect to the
                  determination  of any of the  disputed  items  within ten (10)
                  calendar days following  receipt of  Purchasers'  disagreement
                  notice,   they  shall   proceed  to  refer   their   remaining
                  disagreements to the CPA Firm, which shall,  acting as experts
                  and not as  arbitrators,   determine,   only  with  respect to

                                        9

<PAGE>






                    the remaining differences so submitted,  whether and to what
                    extent,  if any,  the Closing Pro Forma Cash Flow  Statement
                    requires   correction  or  adjustment.   The  parties  shall
                    instruct  the CPA Firm to deliver its written  determination
                    to  Purchasers  and  Sellers  no later  than  the  twentieth
                    calendar  day after  the  remaining  differences  underlying
                    Purchasers' notice are referred to the CPA Firm. The cost of
                    such review and report  shall be borne (A) by Sellers if the
                    difference  between  the Final  Closing  Pro Forma Cash Flow
                    Statement  and Closing Pro Forma Cash Flow  Statement as set
                    forth in Sellers'  calculation of the Closing Pro Forma Cash
                    Flow  Statement  delivered  pursuant to Section  1.3.5(b)(i)
                    hereof is  greater  than the  difference  between  the Final
                    Closing  Pro Forma Cash Flow  Statement  and the Closing Pro
                    Forma  Cash  Flow  Statement  as set  forth  in  Purchasers'
                    calculation  of the  Closing  Pro Forma Cash Flow  Statement
                    delivered  pursuant to Section  1.3.5(b)(i)  hereof,  (B) by
                    Purchasers  if the first  such  difference  is less than the
                    second  such  difference,   and  (C)  otherwise  equally  by
                    Purchasers and Sellers.

                         (v) If the Final Closing Pro Forma Cash Flow  Statement
                    reflects a  negative  cash  amount  (i.e.,  that  during the
                    period  between  October 1, 1998 and the Closing  Date,  the
                    amount of cash  infused  into the  Business  by  Sellers  or
                    Shareholders  exceeded  the amount  withdrawn  by Sellers or
                    Shareholders),   then  Purchasers  shall  pay  Sellers  such
                    negative  amount;  and if the Final  Closing  Pro Forma Cash
                    Flow Statement  reflects a positive cash amount (i.e.,  that
                    during the period  between  October 1, 1998 and the  Closing
                    Date,   the   amount  of  cash   withdrawn   by  Sellers  or
                    Shareholders  from the Business  exceeded the amount infused
                    by Sellers or Shareholders into the Business),  then Sellers
                    shall pay Purchasers such positive amount,  in each case, by
                    wire transfer of immediately available funds to such account
                    as the recipient shall  designate,  within five (5) calendar
                    days of  finalizing  the Final  Closing  Pro Forma Cash Flow
                    Statement pursuant to this Section 1.3.5, provided, however,
                    that if  upon  Purchasers  completing  their  review  of the
                    Closing Pro Forma Cash Flow  Statement,  there is any amount
                    owning  hereunder by either party to the other party that is
                    not in dispute by the  parties,  Purchasers  or Sellers,  as
                    applicable,  shall pay such  undisputed  amount to the other
                    party promptly (within five (5) calendar days of Purchasers'
                    completion of such review).


                                       10

<PAGE>






               (c) To the extent to which this Agreement elsewhere  specifically
          provides  for  reimbursement  of Sellers for  certain  expenses of the
          Business  beginning  with  the  Effective  Date,  including,   without
          limitation,  as set forth in Sections  5.5(a) and 5.5(c) hereof,  such
          amounts  shall not be  included  as an  expense  of the  Business  for
          purposes of this Section 1.3.5.  In addition,  in determining the Cash
          Flow of the Business for the period beginning with the Effective Date,
          the parties  shall give effect to the  provisions  of this  Agreement,
          including without limitation Section 6. 13(a) and Section 7.3 hereof.

          1.4 Assumption of Certain Liabilities; Excluded Liabilities.

          1.4.1  Assumed  Liabilities.   Upon  the  terms  and  subject  to  the
     conditions of this Agreement including but not limited to Purchasers' right
     to indemnity under Section 4.1 hereof,  Purchasers agree,  effective at the
     time of the  Closing,  to assume  all  debts,  obligations,  contracts  and
     liabilities of Sellers of any kind, character or description relating to or
     arising  out of the  conduct of the  Business  (collectively  the  "Assumed
     Liabilities"),  except for the Excluded  Liabilities (as defined by and set
     forth in Section 1.4.2 hereof), including without limitation the following:

               (a) all  liabilities  set forth on the  Effective  Date Pro Forma
          Balance Sheet and all liabilities incurred after the Effective Date to
          the extent not satisfied prior to the Closing Date;

               (b) all  liabilities and obligations of Sellers arising under the
          Contracts (as defined in Section 3.1.15 hereof);

               (c) by way of an assignment of such leases,  all  liabilities and
          obligations of Sellers arising after the Effective Date under the real
          property  lease for the  offices  occupied  by  Flex-Kleen  in Itasca,
          Illinois (the "Itasca Lease");

               (d) all  warranty  liabilities  and  obligations  relating to any
          products  manufactured  or sold by the  Business  on or  prior  to the
          Closing Date (exclusive of any product liability claims);

               (e) except as set forth in Section 1.4.2 hereof,  all liabilities
          or  obligations   relating  to  employee   benefits  or   compensation
          arrangements existing on or prior to the Effective Date, to the extent
          such  obligations  are  reserved for on the  Effective  Date Pro Forma
          Balance  Sheet,  with  respect to any  employee of the Business who is
          employed by Purchasers as of the Closing Date; and


                                       11

<PAGE>






               (f) the  obligations  of  Sellers  and Aqua  Alliance  under that
          certain  Transitional  Services  Agreement  dated as of July 23,  1998
          between Aqua Alliance and Hamon & Cie (International)  S.A. ("Hamon"),
          only with respect to the provision to Hamon and/or its subsidiaries of
          office  space at Itasca,  Illinois,  warehouse  space and  services at
          Sharpsburg,  North  Carolina and the EMS Inventory  Accounting  System
          described in items 2, 6 and 7 of Schedule A thereof.

          1.4.2  Excluded  Liabilities.  Notwithstanding  any  provision in this
     Agreement  including  but not limited to Section  1.4.1 hereof or any other
     writing to the  contrary,  Purchasers  at  Closing  shall  assume  only the
     Assumed  Liabilities and shall not assume any other liability or obligation
     of Sellers of whatever  nature,  whether  presently in existence or arising
     hereafter.  All such other liabilities and obligations shall be retained by
     and remain obligations and liabilities of Sellers (all such liabilities and
     obligations  not being  assumed  being herein  referred to as the "Excluded
     Liabilities"  and  each  an  "Excluded  Liability"),  and,  notwithstanding
     anything to the contrary in this Section 1.4, none of the  following  shall
     be Assumed Liabilities for the purposes of this Agreement:

               (a) any  liability  or  obligation  for  any  Tax  (as  hereafter
          defined)  incurred  prior  to the  Effective  Date  together  with any
          liability  or  obligation  under  Section  6.13(a)  hereof;  provided,
          however,  that  Transfer  Taxes (as  defined  by Section  7.2  hereof)
          incurred in  connection  with the  transactions  contemplated  by this
          Agreement shall be paid in the manner set forth in Section 7.2 hereof.
          For  purposes  of this  Agreement,  "Tax"  means  (i) any net  income,
          alternative  or add-on  minimum tax,  gross  income,  gross  receipts,
          sales, use, ad valorem,  value added,  transfer,  franchise,  profits,
          license, registration,  recording,  documentary,  conveyancing, gains,
          withholding on amounts paid to or by any Seller, payroll,  employment,
          excise,    severance,    stamp,   occupation,    premium,    property,
          environmental,  windfall profit, goods and services,  capital,  Canada
          Pension Plan, custom duty or other tax, governmental fee or other like
          assessment  or  charge  of any  kind  whatsoever,  together  with  any
          interest, penalty, addition to tax or additional amount imposed by any
          governmental  authority responsible for the imposition of any such tax
          (domestic  or  foreign),  or (ii)  liability  for the  payment  of any
          amounts of the type described in (i) as a result of being party to any
          agreement or any express or implied  obligation to indemnify any other
          person;

               (b) any  obligations  of Sellers in  respect of  Flex-Kleen's  or
          Flex-Kleen   Canada's  real  property  sub-leases  for  facilities  in
          Richmond Hill, Ontario,  Canada,  respectively,  and Flex-Kleen's sale
          and leasing back of  facilities  in  Sharpsburg,  North  Carolina (the
          "Sharpsburg Facilities"), whenever  arising,  relating  to  activity  

                                       12

<PAGE>






          or events prior to the Effective Date, it being  understood that as of
          Closing,  Purchaser  shall  enter into a new lease for the  Sharpsburg
          Facilities;

               (c) all liabilities for overdrafts relating to checks written but
          not cashed prior to the Effective Date;

               (d) any  inter-company  liability  with  respect to the  Business
          owing by Sellers to Shareholders or any of their affiliates;

               (e) all liabilities for personal injury claims  (including claims
          relating to silicosis or any personal  injury  relating to exposure to
          Hazardous  Substances  (as  defined  in (f)  below))  and for  product
          liability  claims,  in  each  case  relating  to an  action  or  event
          occurring, or product sold by Sellers, prior to the Effective Date;

               (f) all  liabilities  arising  under  any  Environmental  Law (as
          defined in Section 3.1.20 hereof),  whenever  asserted,  to the extent
          arising  out of: (i) the alleged or actual  violation,  on or prior to
          the  Effective  Date,  of  any  Environmental  Law by  any  Seller  in
          connection  with its  operation  or  ownership  of the Business or the
          Assets, (ii) the existence,  on or prior to the Effective Date, of any
          hazardous,  carcinogenic  or toxic material,  pollutant,  contaminant,
          chemical  or  waste,  regulated  by  or  designated  as  such  by  any
          Environmental Law (any of the foregoing,  a "Hazardous Substance") at,
          on or under any real  property that was owned or leased or operated by
          any Seller,  to the extent to which such  existence  represented as of
          the Effective Date a violation of any Environmental Law or as to which
          any Environmental Law would require  remediation,  (iii) the disposal,
          discharge  or  release,  on or prior  to the  Effective  Date,  of any
          Hazardous  Substance by any Seller in connection with its operation of
          the  Business or by any present or former  affiliate of Sellers at the
          Sharpsburg  Facility,  (iv) the  ownership or operation on or prior to
          the  Effective  Date by  Flex-Kleen  or AWT Air of the  real  property
          constituting the Sharpsburg  Facility,  (v) the ownership or operation
          by any Seller of any business or real  property  other than the Assets
          or the  Business,  (vi) the removal of the items set forth on Schedule
          2.2(a) hereof (notwithstanding that this shall have occurred after the
          Effective  Date),  (vii) any matter  referred  to in  Schedule  3.1.20
          hereof,  and (viii) any claims made by any third party  including  any
          governmental agency with respect to any of the foregoing (collectively
          "Environmental Liabilities" and any of the foregoing an "Environmental
          Liability");


                                       13

<PAGE>






               (g)  any  liability  or  obligation  relating  to  the  following
          employee benefits or compensation arrangements existing on or prior to
          the Effective Date with respect to any employee or former  employee of
          the Business: (A) any retirement or post-retirement benefit or benefit
          plan  including but not limited to any  retirement or  post-retirement
          health  care,   insurance  or  pension   benefit   (collectively   the
          "Post-Retirement  Benefits");  (B) any  carried-over  vacation benefit
          carried  over from any period prior to January 1, 1998  including  but
          not  limited  to any  "equitable  adjustment"  made or  granted to any
          Flex-Kleen employee during 1998 which was not used as of the Effective
          Date; (C) any defined benefit plan or obligation relating thereto; (D)
          any employee retention agreement (collectively the "Employee Retention
          Agreements");  and (E) any employment termination obligation including
          without limitation any obligation under the AWT Air Severance Pay Plan
          adopted April 1, 1997 (the "AWT Air  Severance  Pay Plan"),  except as
          relates to Maurice  and Joan  Hamilton  under the terms of Section 5.1
          hereof (collectively the "Employment Termination Agreements"); and

               (h) any liability or obligation arising out of an action or event
          occurring on or prior to the  Effective  Date  relating to an Excluded
          Asset; provided, however, that Flex-Kleen's indemnity obligation under
          Section 11.2 of its lease for the  Sharpsburg  Facility is an Excluded
          Liability.





                                    ARTICLE 2

CLOSING, ITEMS TO BE DELIVERED,  THIRD PARTY CONSENTS,  CHANGES IN NAME, FURTHER
ASSURANCES AND EFFECTIVE DATE

          2.1  Closing.   The  closing  (the  "Closing")  of  the   transactions
     contemplated  hereby shall take place at 11:00 A.M., local time, on October
     29, 1998 at the offices of Davis, Polk and Wardwell,  450 Lexington Avenue,
     New York, NY 10017. The date of the Closing is sometimes herein referred to
     as the "Closing Date."

          2.2 Items to be  Delivered  at Closing.  At the Closing and subject to
     the terms and conditions herein contained:

          (a) Sellers shall deliver to Purchasers the following:

                    (i) such  bills of sale,  assignments,  patent  assignments,
               endorsements,  and  other  good and  sufficient  instruments  and
               documents  of  conveyance  and  transfer,   in  form   reasonably
               
         

                                               14

<PAGE>






               satisfactory  to  Purchasers  and  their  counsel,  as  shall  be
               necessary  and  effective to transfer and assign to, and vest in,
               Purchasers  all of Sellers'  right,  title and interest in and to
               the Assets, and simultaneously with such delivery,  Sellers shall
               take  all  such  steps  as  may  be  reasonably  required  to put
               Purchasers  in actual  possession  and  operating  control of the
               Assets;

                    (ii)  the  Closing  Cash  Flow  Reimbursement   Payment,  if
               required, pursuant to Section 1.3.5(a) hereof;

                    (iii) to the  extent  not  addressed  by  Section  2.2(a)(i)
               hereof,  an assignment  and  assumption  agreement  pertaining to
               Flex-Kleen's lease for facilities at 955 Hawthorn Drive,  Itasca,
               Illinois  (the "Itasca  Lease") (and shall  deliver to Purchasers
               original copies of all consents obtained for such assignment) and
               with  respect to the Itasca  Lease,  Purchasers  shall at Closing
               provide a letter of credit  security  deposit to the  landlord as
               required  by the  Itasca  Lease to  replace  the letter of credit
               security deposit to be returned by the landlord to the Sellers;

                    (iv) a certificate from Sellers and  Shareholders  dated the
               Closing Date as to the removal of the items set forth on Schedule
               2.2(a) hereof;

                    (v) such documents as Purchasers  shall request  relating to
               the  existence  of Sellers and  Shareholders,  the  authority  of
               Sellers  and   Shareholders  for  these   transactions,   and  as
               Purchasers shall otherwise reasonably request; and

                    (vi) any other documents or items called for by this Article
               2 and elsewhere by this Agreement.

          (b) Purchasers shall deliver to Sellers the following:

                    (i) the Sellers  Closing  Payment in accordance with Section
               1.3 hereof;

                    (ii)  the  Closing  Cash  Flow  Reimbursement   Payment,  if
               required, pursuant to Section 1.3.5(a) hereof;

                    (iii) the Closing Health Care and Prescription  Plan Premium
               Reimbursement Payment and the Closing Benefits Cost Reimbursement
               Payment, in accordance with Sections 5.5 (a) and 5.5(c) hereof,
          

                                               15

<PAGE>






               respectively,  unless  such  payments  shall be  included  in the
               Closing Cash Flow Reimbursement Payment;

                    (iv) an undertaking whereby Purchasers will assume and agree
               to  pay,   discharge  or  perform,   as   appropriate,   Sellers'
               liabilities  and  obligations  to the extent and as  provided  in
               Section 1.4.1 hereof in form  reasonably  satisfactory to Sellers
               and their counsel;

                    (v) such documents as Sellers shall request  relating to the
               existence of  Purchasers,  the authority of Purchasers  for these
               transactions,  and as Sellers shall otherwise reasonably request;
               and

                    (vi) any other documents or items called for by this Article
               2 and elsewhere by this Agreement.

               (c)  Sellers,  Purchasers  and Escrow  Agent  shall  execute  and
          deliver the Escrow Agreement,  and Purchasers shall deliver the Escrow
          Closing Payment to the Escrow Agent.

          2.3 Third Party Consents. To the extent that Sellers' rights under any
     agreement,  contract,  commitment,  lease or other  Asset to be assigned to
     Purchasers  hereunder  may not be  assigned  without the consent of another
     person which as of Closing has not been obtained,  this Agreement shall not
     constitute an agreement to assign the same if an attempted assignment would
     constitute a breach thereof or be unlawful.  Prior to Closing,  Sellers, at
     their expense,  shall use reasonable  commercial efforts to obtain any such
     required  consents.  If any such consent  shall not be obtained or would in
     Sellers' reasonable opinion require  unreasonable  commercial efforts or if
     any attempted  assignment would be ineffective or would impair  Purchasers'
     rights under the Asset in question so that  Purchasers  would not in effect
     acquire  the benefit of all such  rights,  Sellers,  to the maximum  extent
     permitted by law and the Asset,  shall act after the Closing as Purchasers'
     agents,  without  mark-up  charges or expense  to  Purchasers,  in order to
     obtain for it the benefits  thereunder and shall cooperate,  to the maximum
     extent  permitted  by law and  the  Asset,  with  Purchasers  in any  other
     reasonable arrangement designed to provide such benefits to Purchasers.

          2.4 Changes in Name.  On the Closing  Date,  Sellers and  Shareholders
     shall deliver to Purchasers all such executed  documents as may be required
     on that date to change  Sellers'  names in Sellers'  state and  province of
     incorporation, respectively. Not later than twenty (20) calendar days after
     the Closing Date,  Sellers and Shareholders shall deliver to Purchasers all
     such executed documents as may be required to change Sellers' names in each
     state and province where either of the Sellers is qualified to do business.

                                       16

<PAGE>







          2.5 Further  Assurances.  Sellers and  Shareholders  from time to time
     after the Closing, at Purchasers'  request,  will execute,  acknowledge and
     deliver to Purchasers such other instruments of conveyance and transfer and
     will take such other actions and execute and deliver such other  documents,
     certifications  and further assurances as Purchasers may reasonably require
     in order to vest more effectively in Purchasers,  or to put Purchasers more
     fully in possession of, any of the Assets,  or to better enable  Purchasers
     to complete,  perform or discharge any of the  liabilities  or  obligations
     assumed by Purchasers at the Closing pursuant to Section 1.4.1 hereof. Each
     of the parties hereto will cooperate with the other and execute and deliver
     to the other parties hereto such other  instruments  and documents and take
     such other actions as may be reasonably  requested from time to time by any
     other party  hereto as  necessary  to carry out,  evidence  and confirm the
     intended purposes of this Agreement.

          2.6 Effective  Date.  Notwithstanding  the actual date of the Closing,
     the  Closing  shall be deemed to be  effective  as of 5:01 P.M. on July 31,
     1998 (the "Effective  Date").  For the period from the Effective Date until
     the actual date of the Closing,  Sellers  shall be deemed to have  operated
     the  Business  for the benefit of  Purchasers,  as if the Closing had taken
     place on the Effective  Date. All economic  activity of Sellers,  including
     all sales, cash and earnings,  during the period between the Effective Date
     and the Closing, shall inure to Purchasers.  Notwithstanding the foregoing,
     tax reporting and  liability  and  financial  reporting  pertaining to such
     activity  shall be  treated  as set forth in Section  6.13(a)  and  Section
     6.13(b) hereof, respectively.





                                    ARTICLE 3

                         REPRESENTATIONS AND WARRANTIES

          3.1  Representations  and  Warranties of the Sellers.  Sellers  hereby
     represent and warrant to Purchasers as of the Closing Date that,  except as
     set  forth  on a  disclosure  schedule  attached  hereto  (the  "Disclosure
     Schedule"),  each of  which  exceptions  shall  specifically  identify  the
     relevant  subsection  hereof to which it relates  and shall be deemed to be
     representations and warranties as if made hereunder:

          3.1.1  Corporate   Existence.   Each   Shareholder  and  Seller  is  a
     corporation duly organized, validly existing and in good standing under the
     laws of the  jurisdiction of its respective  incorporation.  Each Seller is
     duly qualified to do business and in good standing as a foreign corporation
     in each jurisdiction where the conduct of the Business by it requires it to

                                       17

<PAGE>






     be so qualified,  all of which jurisdictions are listed on Section 3.1.1 of
     the Disclosure Schedule, except for such qualification the absence of which
     would not have a  Material  Adverse  Effect  (as  hereafter  defined).  Any
     penalty  or fine for the  failure by any  Seller to have  qualified  in any
     jurisdiction  shall  constitute  Damages under Section 4.1 hereof.  As used
     herein,  "Material  Adverse Effect" means a material  adverse effect on the
     business,  assets or results of operations of the Business, except any such
     effect  resulting from or arising in connection  with (i) this Agreement or
     the transactions  contemplated hereby, (ii) changes or conditions affecting
     the air pollution analysis,  monitoring,  control or management  industries
     generally or (iii) changes in economic,  regulatory or political conditions
     generally.

          3.1.2 Corporate Power;  Authorization;  Enforceable Obligations.  Each
     Shareholder  and Seller has the  corporate  power and authority to execute,
     deliver and perform this Agreement. The execution, delivery and performance
     of this Agreement by each  Shareholder and Seller have been duly authorized
     by all necessary corporate and shareholder action. This Agreement has been,
     and  the  other  agreements,  documents  and  instruments  required  to  be
     delivered by Sellers or  Shareholders  in  accordance  with the  provisions
     hereof (the "Sellers'  Documents")  will be, duly executed and delivered on
     behalf  of  Shareholders  and  Sellers  by  duly  authorized   officers  of
     Shareholders and Sellers, and this Agreement constitutes,  and the Sellers'
     Documents  when  executed  and  delivered  will  constitute,  the valid and
     binding  obligations of each  Shareholder and Seller as is a party thereto,
     enforceable against such party in accordance with their respective terms.

          3.1.3 No  Interest  in Other  Entities.  Except for  interests  in the
     entities described in Section 3.1.3 of the Disclosure  Schedule,  no shares
     of any corporation or any ownership or other investment interest, either of
     record, beneficially or equitably, in any association,  partnership,  joint
     venture or other legal entity are included in the Assets.

          3.1.4 Validity of Contemplated Transactions,  etc. Except as set forth
     in Section 3.1.4 to the Disclosure  Schedule,  the execution,  delivery and
     performance of this Agreement by each  Shareholder  and Seller does not and
     will not  violate,  conflict  with or  result  in the  breach  of any term,
     condition  or  provision  of, or require  the  consent of any other  person
     under, (a) any existing law, ordinance,  or governmental rule or regulation
     to which such Seller or  Shareholder is subject,  (b) any judgment,  order,
     writ, injunction,  decree or award of any court, arbitrator or governmental
     or  regulatory  official,  body or authority  which is  applicable  to such
     Seller  or  Shareholder,  (c)  the  charter  documents  of such  Seller  or
     Shareholder or any securities issued by such Seller or Shareholder,  or (d)
     any mortgage,  indenture,  agreement,  contract,  commitment,  lease, plan,
     Authorization  (hereinafter  defined in Section  3.1.12),  or other written
     instrument,  to which such Seller or Shareholder is a party,  by which such
 
                                       18

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     Seller or Shareholder  may have rights or by which any of the Assets may be
     bound or affected,  or give any party with rights  thereunder  the right to
     terminate,  modify,  accelerate or otherwise  change the existing rights or
     obligations of such Seller or Shareholder thereunder.  Except as aforesaid,
     no  authorization,  approval or consent of, and no  registration  or filing
     with,  any  governmental  or  regulatory  official,  body or  authority  is
     required in connection with the execution,  delivery or performance of this
     Agreement by Sellers or Shareholders.

          3.1.5  No Third  Party  Options.  There  are no  existing  agreements,
     options,  commitments  or rights  with,  of or to any person to acquire any
     Sellers'  assets,  properties  or  rights  included  in the  Assets  or any
     interest  therein,  except for those  contracts  entered into in the normal
     course of business  consistent with past practice for the sale of inventory
     of such Seller.

          3.1.6 Financial Statements.  Sellers have provided Purchasers with (i)
     an audited  balance sheet of Sellers as of and at October 31, 1997, and the
     related audited statements of income,  shareholders  equity, cash flows and
     notes to financial  statements  for the fiscal year ended  October 31, 1997
     (the  "October 31, 1997  Financial  Statements");  (ii) an audited  balance
     sheet  of  Sellers  as of and at July 31,  1998,  and the  related  audited
     statements  of  income,  shareholders  equity,  cash  flows  and  notes  to
     financial statements for the interim period ended July 31, 1998 ( the "July
     31, 1998 Financial Statements"); and (iii) an unaudited balance sheet as of
     and at July 31,  1998  which on a pro forma  basis  records  the Assets and
     Assumed  Liabilities,   and  excludes  the  Excluded  Assets  and  Excluded
     Liabilities, as if the Closing had taken place on such date (the "Effective
     Date Pro Forma Balance Sheet"), together with such pro forma adjustments.

          The statements of income,  shareholders equity, cash flow and notes to
     financial  statements  included in the July 31, 1998  Financial  Statements
     fairly present the income,  cash flow and changes in shareholders equity of
     Sellers for the nine month period ended July 31, 1998,  have been  prepared
     in accordance with GAAP,  consistently applied, and contain all adjustments
     necessary to present fairly the income,  shareholders  equity and cash flow
     of Sellers for the nine month period then ended.

          The  Effective  Date Pro  Forma  Balance  Sheet  fairly  presents  the
     financial  position  of the Assets and Assumed  Liabilities  as of July 31,
     1998 on a pro forma basis,  as if the Closing had taken place on such date,
     has been  prepared  in  accordance  with GAAP,  consistently  applied,  and
     contains all adjustments necessary to fairly present the financial position
     of the  Assets  and  Assumed  Liabilities  as of July  31,  1998  including
     adjustments to exclude the Excluded Assets and Excluded Liabilities.

                                       19

<PAGE>






          3.1.7 Absence of Undisclosed Liabilities.  Sellers have no liabilities
     or  obligations  with respect to the  Business,  either direct or indirect,
     matured or unmatured or absolute, contingent or otherwise, except:

               (a) as set forth on Section 3.1.7 to the Disclosure Schedule;

               (b) those  liabilities or obligations  set forth on the Effective
          Date Pro Forma Balance Sheet and not heretofore paid or discharged;

               (c) liabilities  arising in the ordinary course of business under
          any  agreement,  contract,  commitment,  lease  or  plan  specifically
          disclosed on Schedule 3.1.7 to the Disclosure Schedule or not required
          to be disclosed because of the term or amount involved; and

               (d) those  liabilities or obligations  incurred,  consistent with
          past business  practice,  in the ordinary course of business since the
          Effective Date.

          For purposes of this Agreement,  the term "liabilities" shall include,
     without  limitation,   any  direct  or  indirect  indebtedness,   guaranty,
     endorsement,  claim, loss, damage, deficiency, cost, expense, obligation or
     responsibility, fixed or unfixed, known or unknown, asserted or unasserted,
     choate or inchoate, liquidated or unliquidated, secured or unsecured.

          3.1.8 Property of Others;  Location of Assets.  Except as set forth in
     Section 3.1.8 of the Disclosure Schedule, no person other than Sellers owns
     any  equipment  or other  tangible  assets or  properties  situated  on the
     premises  of Sellers or  necessary  to the  operation  of the  business  of
     Sellers,  except  for  leased  items  disclosed  in  Section  3.1.8  of the
     Disclosure Schedule and for items of immaterial value. Section 3.1.8 of the
     Disclosure  Schedule  identifies the location of all of the tangible Assets
     being acquired by Purchasers hereunder that are not located on the premises
     of Sellers,  such as but not limited to molds,  casting  patterns,  special
     machinery, and office equipment such as laptop computers.

          3.1.9  Transactions  With  Affiliates.  Except as set forth in Section
     3.1.9 to the Disclosure  Schedule,  no shareholder,  director or officer of
     Sellers,  or any of  such  person's  affiliates,  owns  or has a 5% or more
     ownership interest in any corporation or other entity that is or was during
     the last three years a party to, or in any property  which is or was during
     the last three years the subject of, any  material  contract,  agreement or
     understanding, business arrangement or relationship with Sellers.

                                               20

<PAGE>






          3.1.10 Existing  Condition.  Since the Effective  Date,  except as set
     forth on Section 3.1.10 of the Disclosure Schedule, Sellers with respect to
     the Business have not:

               (a) incurred any liabilities,  other than liabilities incurred in
          the ordinary  course of business  consistent  with past  practice,  or
          discharged  or  satisfied  any  lien  or  encumbrance,   or  paid  any
          liabilities,  other than in the ordinary course of business consistent
          with  past  practice,  or  failed  to pay or  discharge  when  due any
          liabilities  of which the  failure to pay or  discharge  has caused or
          will cause any material  damage or risk of material  loss to it or any
          of its assets or properties;

               (b) sold,  encumbered,  assigned  or  transferred  any  assets or
          properties which would have been included in the Assets if the Closing
          had been held on the Effective Date or on any date since then,  except
          in the ordinary course of business consistent with past practice;

               (c) created, incurred, assumed or guaranteed any indebtedness for
          money borrowed,  or mortgaged,  pledged or subjected any of its Assets
          to any Lien,  except  for  Permitted  Liens  (hereinafter  defined  in
          Section 3.1.11 hereof);

               (d) made or suffered any amendment or termination of any material
          agreement,  contract, commitment, lease or plan to which it is a party
          or by which it is bound, except for amendments or terminations that do
          not  have  economic  effect,  or  canceled,  modified  or  waived  any
          substantial  debts  or  claims  held by it or  waived  any  rights  of
          substantial value,  whether or not in the ordinary course of business,
          except for  cancellations,  modifications  or waivers that do not have
          economic effect;

               (e) declared, set aside or paid any dividend or made or agreed to
          make any other  distribution  or payment  in  respect  of its  capital
          shares or  redeemed,  purchased  or  otherwise  acquired  or agreed to
          redeem, purchase or acquire any of its capital shares;

               (f)  suffered  any damage,  destruction  or loss,  whether or not
          covered by  insurance,  (i)  materially  and  adversely  affecting its
          business,  operations,  assets, properties or prospects or (ii) of any
          item or items carried on its books of account  individually  or in the
          aggregate at more than $5,000 or suffered any  repeated,  recurring or
          prolonged  shortage,  cessation or interruption of supplies or utility
          or other services required to conduct its business and operations;

               (g) suffered any Material Adverse Effect;


                                               21

<PAGE>






               (h)  received  written  notice or had  knowledge of any actual or
          threatened  litigation,  workers'  compensation  claim,  human  rights
          claim,  personal injury claim,  product liability claim or other claim
          or  demand,  labor  trouble,  strike  or  other  occurrence,  event or
          condition  of any  similar  character  which has had or might  have an
          adverse  effect on its  business,  operations,  assets,  properties or
          prospects;

               (i) made  commitments or agreements for capital  expenditures  or
          capital  additions or  betterments  exceeding in the aggregate  $5,000
          except  such as may be involved in  ordinary  repair,  maintenance  or
          replacement of its assets;

               (j) increased the salaries or other  compensation of, or made any
          advance  (excluding  advances  for  ordinary  and  necessary  business
          expenses) or loan to, any of its employees or made any increase in, or
          any addition to, other  benefits to which any of its  employees may be
          entitled, other than in the ordinary course of business;

               (k) changed any of the  accounting  principles  followed by it or
          the methods of applying such principles;

               (l) taken any action which under  Sellers'  prevailing  operating
          policies or procedures  requires the written approval or authorization
          of George Mammola;

               (m)  entered  into any  transaction  other  than in the  ordinary
          course of business consistent with past practice; or

               (n)  suffered,  caused or  permitted an  Environmental  Liability
          which if  unremediated  would  require  an  expenditure  in  excess of
          $5,000.

          3.1.11  Title to  Properties.  Each Seller has good and valid title to
     all of its properties and assets, real, personal and mixed, included in the
     Assets which such Seller purports to own,  including without limitation all
     properties  and assets  reflected in the  Effective  Date Pro Forma Balance
     Sheet  (except for  inventory  sold since the date  thereof in the ordinary
     course of business  consistent  with past  practice)  free and clear of all
     Liens,  except for (i) Liens for  current  Taxes not yet due and payable or
     which are being  contested in good faith,  (ii) Liens  disclosed in Section
     3.1.11  of  the  Disclosure   Schedule,   (iii)  worker's,   carrier's  and
     materialman's  Liens,  and (iv) Liens  that are  immaterial  in  character,
     amount,  and extent,  and which do not detract  from the value or interfere
     with the present use of the properties they affect ("Permitted Liens").

          3.1.12  Compliance  with Law;  Authorizations.  Except as disclosed in
     Section  3.1.12 of the  Disclosure  Schedule,  since January 1, 1995,  each
     Seller  has  complied  with,  and has not been in  violation  of any,  law,
     ordinance,  or  governmental  or  regulatory  rule or  regulation,  whether
     

                                       22

<PAGE>






     federal, Canadian,  Provincial,  state, local or foreign, applicable to the
     Business,   including,  without  limitation,  laws,  rules  or  regulations
     primarily  related  to  employee  health and  safety  (the  "Regulations").
     Sellers own, hold and possess all material franchises,  licenses,  permits,
     rights,  applications,  filings,  registrations  and  other  authorizations
     ("Authorizations")  which are required to conduct the Business as presently
     conducted;  all such  Authorizations  are in full  force  and  effect;  and
     Sellers have no knowledge of any threatened  suspension or  cancellation of
     them. All such Authorizations are listed and described in Section 3.1.12 of
     the  Disclosure  Schedule.  Sellers are not in default,  nor has any Seller
     received  any written  notice of any claim of default,  with respect to any
     such  Authorization,  and the use of the Authorizations by Sellers has been
     in compliance with the Regulations.

          3.1.13  Litigation.  Except  as set  forth in  Section  3.1.13  of the
     Disclosure   Schedule,   no   litigation,    including   any   arbitration,
     investigation  or other  proceeding  of or before any court,  arbitrator or
     governmental  or regulatory  official,  body or authority is pending or, to
     the knowledge of any of Alain Brunais,  George  Mammola,  William Hughes or
     Wayne Fritz, threatened against Sellers or which relates to the Assets, the
     Business or the transactions  contemplated by this Agreement, nor do to the
     knowledge of such  persons,  is there any  reasonably  likely basis for any
     such litigation,  arbitration,  investigation or proceeding. No Seller is a
     party  to or  subject  to the  provisions  of any  judgment,  order,  writ,
     injunction,  decree or award of any court,  arbitrator or  governmental  or
     regulatory  official,  body or authority which could  materially  adversely
     affect Sellers,  the Assets, the Business or the transactions  contemplated
     hereby. All litigation, losses and proceedings against or involving Sellers
     during the previous  five (5) years,  both  resolved  and pending,  are set
     forth on Section 3.1.13 of the Disclosure Schedule.

          3.1.14 Insurance. Section 3.1.14 of the Disclosure Schedule sets forth
     a list of all insurance  policies and bid and performance bonds relating to
     the Assets and the business and  operations of the  Business.  There are no
     claims by  Sellers  pending  under any such  policies  or bonds as to which
     coverage has been  questioned,  denied or disputed by the  underwriters  of
     such  policies  or bonds or in  respect  of which  such  underwriters  have
     reserved their rights.  The insurance  maintained by Sellers with regard to
     the  Business is adequate for the  business  conducted  by Sellers.  To the
     knowledge of Alain Brunais,  Augustine  Bolella,  William Komianos,  Jeremy
     Long and George Mammola,  all insurance  claims (other than medical claims)
     involving  Sellers  during the previous  five (5) years,  both resolved and
     pending, are set forth on Section 3.1.14 of the Disclosure Schedule.

                                       23

<PAGE>






          3.1.15  Contracts  and  Commitments.  Except as set  forth in  Section
     3.1.15 of the Disclosure Schedule, no Seller is a party to any written:

               (a) agreement,  contract or commitment with any present or former
          employee or consultant or for the employment of any person,  including
          any consultant, who is engaged in the conduct of the Business;

               (b) agreement, contract or commitment for the future purchase of,
          or payment  for,  supplies  or  products,  or for the  performance  of
          services  by a third party which  supplies,  products or services  are
          used in the conduct of the Business  involving in any one case $20,000
          or more,  except as to contracts for the  fabrication of equipment for
          which the limitation should be $75,000 or more;

               (c) agreement,  contract or commitment to sell or supply products
          ("Goods Contracts") or to perform services  ("Services  Contracts") in
          connection  with the business  involving  in any one case  $100,000 or
          more;

               (d)  agreement,  contract or commitment  relating to the Business
          not otherwise listed on the Disclosure  Schedule and continuing over a
          period  of more than six  months  from the date  hereof  or  exceeding
          $20,000 in value;

               (e)   distribution,   dealer,   representative  or  sales  agency
          agreement, contract or commitment relating to the Business;

               (f)  lease  under  which any  Seller  is either  lessor or lessee
          relating  to the  Assets  or any  property  at which  the  Assets  are
          located;

               (g) note, debenture,  bond, equipment trust agreement,  letter of
          credit  agreement,  loan agreement or other contract or commitment for
          the  borrowing  or  lending  of  money  relating  to the  Business  or
          agreement or arrangement  or a line of credit or guarantee,  pledge or
          undertaking of the  indebtedness  of any other person  relating to the
          Business;

               (h)  agreement,  contract  or  commitment  for  any or  political
          contribution relating to the Business;

               (i)  commitment  or  agreement  for any  capital  expenditure  or
          leasehold improvement in excess of $5,000 relating to the Business;

               (j)  agreement,  contract or commitment  limiting or  restraining
          Sellers,  the  Business  or any  successor  thereto  from  engaging or
          competing in any manner or in any  business,  nor,  to  Sellers'  

                                       24

<PAGE>






          knowledge,  is any  employee of Sellers  engaged in the conduct of the
          Business subject to any such agreement, contract or commitment;

               (k) license, franchise,  distributorship or other agreement which
          relates in whole or in part to any software,  patent, trademark, trade
          name, service mark or copyright or to any ideas,  technical assistance
          or  other  know-how  of or  used  by  Sellers  in the  conduct  of the
          Business; or

               (l) material  agreement,  contract or commitment  relating to the
          Business not made in the ordinary course of business.

               With respect to each such agreement, contract, commitment, lease,
          plan and other instrument,  document or undertaking  listed in Section
          3.1.15  of the  Disclosure  Schedule,  or not  required  to be  listed
          therein  because of the amount  thereof  (the  "Contracts"  and each a
          "Contract"):  (i) each  Contract  is in full  force and  effect and is
          valid and enforceable in accordance with its terms; (ii) no Seller is,
          and to  knowledge of any such  Seller,  no other party  thereto is, in
          default in the performance,  observance or fulfillment of any material
          obligation, covenant or condition contained in any Contract; and (iii)
          no event has  occurred  which  with or  without  the giving of written
          notice  or  lapse  of  time,  or  both,  would  constitute  a  default
          thereunder by any Seller or, to the  knowledge of any such Seller,  of
          any other party thereto.

          3.1.16  Additional  Information.  Section  3.1.16  to  the  Disclosure
     Schedule contains accurate schedules, lists or summary descriptions, as the
     case may be, of the following:

               (a) [Intentionally omitted]

               (b) the  name and  address  of every  bank  and  other  financial
          institution  in which  either  Seller  maintains  an account  (whether
          checking, savings or otherwise),  lock box or safe deposit box for the
          Business,  and the account numbers and names of persons having signing
          authority or other access thereto;

               (c) the names and titles of and  current  annual  base  salary or
          hourly rates for all  employees  of Sellers  engaged in the conduct of
          the Business,  together with a statement of the full amount and nature
          of any other remuneration,  whether in cash or kind, paid to each such
          person during the current or  immediately  previous  calendar year and
          the bonuses  accrued  for,  the  incentive,  bonus plan or  agreement,
          commission  structure or entitlement,  and as of October 23, 1998, the
          vacation and severance benefits to which each such person is entitled;
          and


                                       25

<PAGE>






               (d) all names under which each of the Sellers has  conducted  any
          business or which such Seller has otherwise  used during the last five
          years.

          3.1.17  Labor  Matters.  Except as set forth in Section  3.1.17 of the
     Disclosure  Schedule,  since  January 1, 1995,  no Seller has  suffered any
     strike, slowdown, picketing or work stoppage by any union or other group of
     employees  affecting the Business;  no Seller is a party to any  collective
     bargaining  agreement  with respect to employees of the  Business,  no such
     agreement determines the terms and conditions of employment of any employee
     of the Business of such Seller,  no  collective  bargaining  agent has been
     certified as a  representative  of any of the  employees of the Business of
     such Seller, and no representation  campaign or election is now in progress
     with respect to any of the employees of the Business of either Seller.

          3.1.18 Employee Benefit Plans and Arrangements.

               (a) Section 3.1.18 of the Disclosure Schedule contains a complete
          list of all  employee  benefit  plans,  whether  formal  or  informal,
          whether or not set forth in writing,  and whether  covering one person
          or more than one person,  sponsored  or  maintained  by Sellers or any
          affiliate of Sellers for the benefit of any employee of the  Business.
          For the purposes hereof, the term "employee benefit plan" includes all
          plans,  retirement  and  post-retirement  benefits,  funds,  programs,
          policies,   arrangements,   practices,   customs  and   understandings
          providing  benefits of economic  value to any  employee,  beneficiary,
          dependent or assignee of any such employee other than regular  salary,
          wages  or  commissions  paid   substantially   concurrently  with  the
          performance of the services for which paid.  Without  limitation,  the
          term  "employee  benefit plan" includes all employee  welfare  benefit
          plans within the meaning of section  3(l) of the  Employee  Retirement
          Income  Security  Act of 1974,  as  amended  ("ERISA"),  all  employee
          pension  benefit  plans within the meaning of section 3(2) of ERISA or
          any other similar United States,  Canadian,  State and Provincial law,
          statute, regulation or rule.

               (b) No "employee benefit plan" covering employees of the Business
          is a  "multiemployer  plan"  within the  meaning  of Section  3(37) of
          ERISA.

          3.1.19 Intellectual Property Matters. Section 3.1.19 of the Disclosure
     Schedule sets forth a list of all patents,  trademarks, trade names, logos,
     owned,  licensed  or  used by  Sellers  or held  for use  primarily  in the
     Business (the "Intellectual  Property"),  all of which are owned by Sellers
     free and clear of any Liens,  other  than  Permitted  Liens,  except as set
     forth in Section 3.1.19 of the Disclosure Schedule.  Except as set forth in
     Section 3.1.19 of the Disclosure Schedule,  no claim or litigation has been
     asserted  and Sellers has not  received  written  notice of any  threatened
     claim of  infringement  or any  other  claim or  litigation  by any  person
     contesting the right of Sellers to use, or the validity or enforceability

                                       26

<PAGE>






     of, the Intellectual Property or challenging or questioning the validity or
     effectiveness of any license or agreement  pertaining  thereto or asserting
     the misuse thereof.  The use by Sellers of the Intellectual  Property prior
     to the Closing has not infringed  upon the rights of any person or violated
     any license or other  agreement  applicable  thereto.  No present or former
     employee  of  Sellers  and no  other  person  owns or has any  proprietary,
     financial or other  interest,  direct or indirect,  in whole or in part, in
     the Intellectual  Property.  Section 3.1.19 of the Disclosure Schedule also
     lists all  confidentiality or nondisclosure  agreements to which Sellers or
     any of Sellers' employees is a party which relates to the Business.

          3.1.20 Environmental Matters.

               (a)  Except as set  forth in  Section  3.1.20  of the  Disclosure
          Schedule, each Seller has obtained all permits, licenses, certificates
          and other  authorizations  which are required in  connection  with the
          conduct of the Business by any and all federal, Canadian,  Provincial,
          state or local law,  rule or  regulation,  as in effect on or prior to
          the  date  hereof,   relating  to  pollution  or   protection  of  the
          environment,  including Regulations relating to emissions, discharges,
          releases  or   threatened   releases  of   pollutants,   contaminants,
          chemicals,  or toxic or other Hazardous  Substances or wastes into the
          environment  (including without limitation ambient air, surface water,
          groundwater,  or land),  or  otherwise  relating  to the  manufacture,
          processing,   distribution,   use,   treatment,   storage,   disposal,
          transport,  or handling of  pollutants,  contaminants,  chemicals,  or
          toxic or other  Hazardous  Substances or wastes,  but  excluding  such
          laws,  rules, or regulations  primarily related to employee health and
          safety  (collectively  the  "Environmental  Laws"  and  any of such an
          "Environmental Law").

               (b)  Except as set  forth in  Section  3.1.20  of the  Disclosure
          Schedule,  each Seller is in compliance in the conduct of the Business
          with all terms  and  conditions  of the  required  permits,  licenses,
          certificates  and  authorizations,  and is also in compliance with all
          other limitations,  restrictions, conditions, standards, prohibitions,
          requirements,  obligations,  schedules and timetables contained in the
          Environmental Laws or contained in any plan, order, decree,  judgment,
          injunction,  notice or demand letter issued,  entered,  promulgated or
          approved  thereunder  and which has been issued to or is applicable to
          any  Seller  in   connection   with  its  operation  of  the  Business
          (collectively "Order").

               (c)  Except as set  forth in  Section  3.1.20  of the  Disclosure
          Schedule,  no Seller is aware of, nor has such Seller received written
          notice  of,  any  past  or  present  event,  condition,  circumstance,
          activity,  practice, incident, action or plan which has resulted in or
          is reasonably likely to result in a violation of any Environmental Law
          or any Order  thereunder  or which has  resulted  in or is  reasonably
          
                                       27

<PAGE>






     likely to result in an obligation under any  Environmental Law or any Order
     thereunder to perform any remedial,  removal or clean-up activity, or which
     is reasonably likely to give rise to any common law or legal liability,  or
     otherwise form the basis of any claim, action,  demand,  suit,  proceeding,
     hearing,  study or  investigation,  based on or related to the manufacture,
     processing,  distribution, use, treatment, storage, disposal, transport, or
     handling,  or the emission,  discharge,  release or threatened release into
     the  environment,  of any  pollutant,  contaminant,  chemical,  or toxic or
     hazardous substance or waste.

               (d)  Except as set  forth in  Section  3.1.20  of the  Disclosure
          Schedule,  there is no civil, criminal or administrative action, suit,
          demand,  claim,  hearing,  written  notice or demand  letter,  written
          notice of violation,  investigation,  or proceeding pending or, to the
          knowledge  of  Sellers,   threatened  against  either  of  Sellers  in
          connection with the conduct of the Business relating in any way to any
          Environmental Law.

          3.1.21 Real Property.

               (a) Real Property Defined. All real property (including,  without
          limitation,  all  interests  in  and  rights  to  real  property)  and
          improvements  located thereon which are owned or leased by Sellers and
          used in  connection  with the  Business  or included in the Assets are
          listed  on  Section  3.1.21  of the  Disclosure  Schedule  (the  "Real
          Property").

               (b) Owned Real  Property.  Sellers  own no Real  Property  in fee
          simple.

               (c) Leased Real Property.  With respect to the Real Property that
          is leased by Sellers,  all of which is identified on Section 3.1.21 of
          the Disclosure Statement:

                    (i) Sellers have delivered to Purchasers a true and complete
               copy of the  Itasca  Lease,  which  is the  only  lease  for Real
               Property that is being assumed by or assigned to Purchasers;

                    (ii) The  Itasca  Lease is in full  force and effect and has
               not been assigned,  modified,  supplemented  or amended except as
               set forth on Section  3.1.21 of the Disclosure  Schedule,  and no
               Seller  is in  default  thereunder,  and,  to  the  knowledge  of
               Sellers,  no other party to such lease is in default  thereunder,
               and no  circumstances  or state of facts presently  exists which,
               with the  giving of written  notice or passage of time,  or both,
               would  permit the  landlord  under such lease to  terminate  such
               lease; and


                                       28

<PAGE>






                    (iii) Section 3.1.21 of the Disclosure Schedule sets forth a
               description  of all executory  contracts  made by or on behalf of
               Sellers,  or by which  Sellers  are  bound,  with  respect to the
               Itasca  property  including,   without   limitation,   operation,
               management, maintenance, utility, and construction contracts (the
               "Leaseholds  Executory  Contracts").  At Closing,  Sellers  shall
               deliver to the  Purchasers a true and complete copy (the original
               execution copy, if available) of each of the Leaseholds Executory
               Contracts.

          3.1.22 Availability of Documents.

               (a) [Intentionally omitted]

               (b)  Sellers  have made  available  to  Purchasers  (i)  accounts
          receivable aging reports with run dates of October 26, 1998 as of July
          31,1998 and September 25, 1998 for each of Flex-Kleen  and  Flex-Kleen
          Canada   (collectively,   the  "A/R  Aging  Reports"),   (B)  accounts
          receivable check receipt  registers with run dates of October 27, 1998
          for  the  fiscal  months  of  July  and  September  1998  for  each of
          Flex-Kleen and  Flex-Kleen  Canada  (collectively,  the "Check Receipt
          Registers"),  (C) Physical  Inventory at Sharpsburg with a run date of
          October  27,  1998 (the  "Inventory  Report")  and (D) the  Listing of
          Equipment and Machinery as of July 31, 1998 (the "Equipment Listing").
          Copies of each of the A/R Aging Reports,  the Check Receipt Registers,
          the Inventory Report and the General Ledger  (collectively the "Ledger
          Reports") is attached to Section 3.1.22(b) to the Disclosure Schedule.
          The  information  contained in the Ledger Reports has been prepared in
          the ordinary  course of business with Sellers'  customary care and, to
          the knowledge of William Hughes and Wayne Fritz,  is true and correct.
          The   foregoing   representation   shall   not  be   construed   as  a
          representation as to the  collectability or quality of the receivables
          listed on A/R Aging  Reports  or as to the  quality  of the  inventory
          listed  on the  Inventory  Report  or  the  assets  identified  in the
          Equipment Listing.

          3.1.23 Assets. The Assets include all rights and property necessary to
     the present  conduct of the Business by  Purchasers,  and used by or in the
     Business in the manner it is presently conducted by Sellers.

          3.1.24  Conditions  Affecting  Sellers.   Each  Seller  has  used  its
     commercially  reasonable  efforts  to keep  available  for  Purchasers  the
     services of the employees,  agents,  customers and suppliers of such Seller
     active in the  conduct  of the  Business.  Except  as set forth in  Section
     3.1.24  of the  Disclosure  Schedule,  Sellers  have not been  notified  in
     writing that any employee, agent, customer or supplier or other 



                                       29

<PAGE>






     advantageous  arrangement will be lost or become  unavailable to Purchasers
     on account of the consummation of the transactions contemplated hereby.

          3.1.25  Warranty  Costs.  The  Effective  Date Pro Forma Balance Sheet
     contains an adequate  reserve for  pre-Effective  Date  warranty  costs and
     expenses on the basis of the actual warranty costs and expenses incurred by
     the Business for the one-year  period  immediately  prior to the  Effective
     Date.

          3.1.26 Flex-Kleen Canada. Except as set forth in Section 3.1.26 of the
     Disclosure Schedule:

               (a) Flex-Kleen  Canada is not a  non-resident  of Canada with the
          meaning  of  Section  116 of the  Income  Tax Act of  Canada.  Neither
          Flex-Kleen nor the Shareholders are disposing of any "Taxable Canadian
          Property"  in this  transaction  for  purposes  of the  Income Tax Act
          (Canada);

               (b) Flex-Kleen  Canada is registered for purposes of the GST, and
          Flex-Kleen Canada's registration number is 120881336RT002;

               (c)  Flex-Kleen  Canada does not have  assets  with an  aggregate
          value in  excess  of CDN  $35,000,000  (thirty-five  million  Canadian
          dollars),  and Flex-Kleen Canada does not generate gross revenues from
          sales in or from Canada in excess of an aggregate  of CDN  $35,000,000
          (thirty-five million Canadian dollars) per year;

               (d) Purchasers  will not assume any  liabilities  with respect to
          any  underfunding  which may  exist  under any  defined  benefit  plan
          covering  Canadian  employees of the Business as of the Closing  Date;
          and

               (e) There are no registrations,  executions,  levies, or the like
          with  respect  to  the  Business  or  affecting  the  Assets   against
          Flex-Kleen  Canada  or any  of  its  predecessor  entities  under  the
          Personal Property Security Act of Ontario, the Bank Act of Canada, the
          Bankruptcy and Insolvency Act of Canada,  and/or the Bulk Sales Act of
          Ontario.

          3.2 Representations and Warranties of Purchasers. Purchasers represent
     and warrant to Sellers as follows:

          3.2.1  Corporate  Existence.  Each  Purchaser  is a  corporation  duly
     organized,  validly  existing  and in good  standing  under the laws of the
     jurisdiction of its incorporation.

                                       30

<PAGE>






          3.2.2 Corporate Power and Authorization.  Each Purchaser has the power
     and  authority  to  execute,   deliver  and  perform  this  Agreement.  The
     execution,  delivery and  performance  of this  Agreement by each Purchaser
     have been duly authorized by all necessary corporate action. This Agreement
     has been duly executed and delivered by each Purchaser and  constitutes the
     legal, valid and binding obligation of such Purchaser  enforceable  against
     such Purchaser in accordance with its terms.

          3.2.3  Validity of  Contemplated  Transactions,  etc.  The  execution,
     delivery and  performance  of this Agreement by each Purchaser does not and
     will not  violate,  conflict  with or  result  in the  breach  of any term,
     condition  or  provision  of, or require the consent of any other party to,
     (a) any existing  law,  ordinance,  or  governmental  rule or regulation to
     which such Purchaser is subject, (b) any judgment, order, writ, injunction,
     decree or award of any court,  arbitrator  or  governmental  or  regulatory
     official, body or authority which is applicable to such Purchaser,  (c) the
     charter  documents  or  bylaws  of,  or  any  securities  issued  by,  such
     Purchaser, or (d) any mortgage, indenture, agreement, contract, commitment,
     lease, plan or other written  instrument to which such Purchaser is a party
     or  by  which  Purchaser  is  otherwise  bound.  Except  as  aforesaid,  no
     authorization,  approval or consent of, and no registration or filing with,
     any governmental or regulatory  official,  body or authority is required in
     connection  with the execution,  delivery and performance of this Agreement
     by Purchasers.

          3.2.4 Met-Pro Canada. Met-Pro Canada is registered for purposes of the
     GST, and Met-Pro Canada's registration number is 882943624RT0001.

          3.2.5 No Other  Representations.  EXCEPT FOR THE  REPRESENTATIONS  AND
     WARRANTIES OF SELLERS SET FORTH IN SECTION 3.1 HEREOF, PURCHASERS AGREE AND
     ACKNOWLEDGE  THAT  THE  PURCHASED  ASSETS  ARE  BEING  SOLD  "AS  IS,"  AND
     PURCHASERS  AGREE TO ACCEPT THE  PURCHASED  ASSETS AND THE  BUSINESS IN THE
     CONDITION  THAT THEY ARE IN ON THE CLOSING DATE WITHOUT  RELIANCE  UPON ANY
     OTHER  REPRESENTATIONS  OR  WARRANTIES,  EXPRESS OR IMPLIED,  MADE BY OR ON
     BEHALF OF OR IMPUTED TO SELLERS OR THEIR  AFFILIATES.  Without limiting the
     generality of the foregoing,  Purchasers acknowledge that Sellers and their
     affiliates  make no  representation  or  warranty  with  respect to (a) any
     projections,  estimates  or  budgets  delivered  to or  made  available  to
     Purchasers  of  future  revenues,  future  results  of  operations  (or any
     components  thereof),  future cash flows or future financial  condition (or
     any  component  thereof)  of  the  Business  or  the  future  business  and
     operations  of the  Business  or, (b) except  for the  representations  and
     warranties  of  Sellers  set  forth  in  Section  3.1  hereof,   any  other
     information  or documents  made  available to Purchasers or their  counsel,
     accountants or advisors with respect to the Business.

                                       31

<PAGE>






          3.3 Survival of Representations and Warranties.

               (a) All  representations  and  warranties  made by the parties in
          this Agreement or in any certificate, schedule, statement, document or
          instrument  furnished  hereunder or in  connection  with  negotiation,
          execution and  performance of this Agreement shall survive the Closing
          for  a  period  of  one  year,  except  for  the  representations  and
          warranties set forth in (i) Section 3.1.19 hereof, which shall survive
          the Closing until the period of any applicable  statute of limitations
          or extension thereof for the assertion of any third party claims shall
          expire, and (ii) Section 3.1.18 and Section 3.1.20 hereof, which shall
          survive the  Closing  indefinitely  with  respect to a claim or matter
          resulting solely from any claim made by any third party; provided that
          Section  3.1.18 and 3.1.20  shall  survive  the  Closing  only for the
          period of any applicable  statute of limitations or extensions thereof
          with respect to claims not resulting from such third party claims.

               (b) For  purposes of Section  3.3(a),  a "third  party"  shall be
          deemed not to include Purchasers' affiliates.

               (c)  Notwithstanding  any investigation or audit conducted before
          or after the Closing Date or the decision of any party to complete the
          Closing, each party shall be entitled to rely upon the representations
          and warranties  set forth herein;  provided,  however,  that if on the
          Closing Date any of William L. Kacin,  Gary J. Morgan,  Robert Cane or
          Jeffrey H. Nicholas has actual  knowledge that any  representation  or
          warranty made by Sellers is inaccurate as of the date made, Purchasers
          and their  affiliates  shall have no right or remedy after the Closing
          to the extent of such  inaccuracy,  and shall be deemed to have waived
          their rights to indemnification to the extent thereof.

               (d) Neither the  identification of Jeffrey H. Nicholas in Section
          3.3(c) nor his participation in the transactions  contemplated  hereby
          shall  create  any basis  for  disqualifying  him or Fox,  Rothschild,
          O'Brien & Frankel, LLP from representing Purchasers in any controversy
          or dispute arising out of the transactions contemplated hereby.





                                       32

<PAGE>






                                    ARTICLE 4
                                 INDEMNIFICATION

          4.1 Indemnification by Sellers and Shareholders.

          4.1.1  Indemnification  by Sellers  and  Shareholders.  Subject to the
     limitation  set forth in Section  4.1.2  hereof,  Sellers and  Shareholders
     jointly and severally indemnify  Purchasers,  their affiliates,  successors
     and assigns (each an  "Indemnified  Purchaser  Party") against and agree to
     hold each of them  harmless  from any and all damage,  loss,  liability and
     expense   (including,   without   limitation,    reasonable   expenses   of
     investigation and reasonable attorneys' and accountants' fees and expenses)
     (collectively "Damages") in connection with any claim, demand,  assessment,
     fine, penalty,  judgment,  deficiency,  liability,  cost, expense,  action,
     suit,  proceeding  or judgment  incurred  or  suffered  by any  Indemnified
     Purchaser Party arising out of any of:

               (a) any misrepresentation or breach of representation or warranty
          made by any Seller or Shareholder pursuant to this Agreement;

               (b) any breach of covenant or  agreement  made or to be performed
          by any Seller or Shareholder in this Agreement; and

               (c) any Excluded Liability as defined by Section 1.4.2 hereof.

          4.1.2 Limitation on Sellers' and Shareholders'  Liability for Breaches
     of  Representations  and Warranties.  Sellers and Shareholders shall not be
     liable under Section  4.1.1(a) unless the aggregate  amount of Damages with
     respect to all matters  referred to in Section 4.1.1(a) exceeds $25,000 and
     then only to the  extent of such  excess  and  Sellers'  and  Shareholders'
     maximum  liability  under  Section  4.1.1(a)  shall not exceed  $1,500,000;
     provided further,  that Sellers and Shareholders  shall not be liable under
     Section  4.1.1(a) for any Damages with respect to  liabilities in excess of
     the amounts reserved therefor on the Effective Date Pro Forma Balance Sheet
     unless such  liabilities  exceed the aggregate of amount of all reserves on
     the Effective Date Pro Forma Balance Sheet,  and then only to the extent of
     such excess.

          4.1.3 Liability for Breach of Covenant and Excluded  Liabilities.  (a)
     The  limitation  on liability  imposed by Section  4.1.2 hereof for Damages
     under  Section  4.1.1(a)  hereof shall not apply to Damages  under  Section
     4.1.1(b)  hereof or Section  4.1.1(c)  hereof,  each of which  shall not be
     subject  to such  $25,000  threshold  amount  nor such  $1,500,000  maximum
     amount, and shall be without limitation.

                                       33

<PAGE>






               (b) The  expiration  provided  for by  Section  3.3 hereof of the
          representations  and warranties set forth in Article 3 hereof does not
          apply  to the  indemnification  obligations  provided  for by  Section
          4.1.1(b)  hereof and Section  4.1.1(c)  hereof.  The  expiration  of a
          representation and warranty that may also be of similar subject matter
          to an Excluded Liability does not affect Purchasers'  indemnity rights
          for the Excluded  Liability.  The parties further  acknowledge that as
          pertains to a given subject  matter,  there may be  differences in the
          scope  of a  representation  and  warranty,  on the one  hand,  and an
          Excluded  Liability,  on the other  hand,  and that the  accuracy of a
          representation  and  warranty  shall  not be deemed to limit a party's
          right to indemnity for an Excluded Liability, nor shall the absence of
          an  indemnity  claim for an  Excluded  Liability  be deemed to limit a
          party's  right to  indemnification  for breach of  representation  and
          warranty.

          4.2  Indemnification  by Purchasers.  Purchasers jointly and severally
     indemnify  Sellers  and  Shareholders,  their  affiliates,  successors  and
     assigns (each an "Indemnified Seller Party") against and agree to hold each
     of them  harmless  from any and all Damages in  connection  with any claim,
     demand, assessment, fine, penalty, judgment,  deficiency,  liability, cost,
     expense,  action, suit,  proceeding or judgment incurred or suffered by any
     Indemnified Seller Party arising out of:

               (a)  any   misrepresentation   or  breach  of  representation  or
          warranty,  covenant  or  agreement  made  or to be  performed  by  any
          Purchaser pursuant to this Agreement; and

               (b) any Assumed Liability as defined by Section 1.4.1 hereof.

          4.3 Method of  Asserting  Claims,  etc. In the event that any claim or
     demand for which Sellers or Shareholders  would be liable to an Indemnified
     Purchaser  Party  hereunder  is asserted  against or sought to be collected
     from an  Indemnified  Purchaser  Party by a third  party,  the  Indemnified
     Purchaser  Party shall notify Sellers and  Shareholders  in writing of such
     claim or  demand,  specifying  the  nature of such  claim or demand and the
     amount or the estimated  amount thereof to the extent then feasible  (which
     estimate  shall not be  conclusive  of the final  amount of such  claim and
     demand)  (the  "Claim  Notice").  The Claim  Notice  shall be given  within
     fifteen (15) calendar  days after an  Indemnified  Purchaser  Party becomes
     aware of any fact,  condition  or event  which may give rise to a claim for
     which   indemnification  may  be  sought  hereunder.   Notwithstanding  the
     foregoing,  the failure by an  Indemnified  Purchaser  Party to give timely
     notice shall not affect its rights to indemnification hereunder,  except to
     the extent to which Sellers or Shareholders shall demonstrate damage caused
     by such failure.  Sellers and Shareholders shall have fifteen (15) calendar
     days from receipt of the Claim  Notice (the "Notice  Period") to notify the
     Indemnified  Purchaser  Party,  (x)  whether  or  not  they  dispute  their
     liability to the Indemnified Purchasers Party hereunder with respect to

                                       34

<PAGE>






     such claim or demand and (y) notwithstanding  any such dispute,  whether or
     not they desire, at their sole cost and expense,  to defend the Indemnified
     Purchaser Party against such claim or demand.

               (a) If Sellers  or  Shareholders  dispute  their  liability  with
          respect to such claim or demand or the amount thereof  (whether or not
          Sellers or  Shareholders  desire to defend the  Indemnified  Purchaser
          Party against such claim or demand as provided in  paragraphs  (b) and
          (c) below),  such dispute shall be resolved in accordance with Section
          4.5  hereof.  Pending  the  resolution  of any  dispute  by Sellers or
          Shareholders  of their  liability with respect to any claim or demand,
          such claim or demand shall not be settled by the Indemnified Purchaser
          Party without the prior written consent of Sellers or Shareholders.

               (b)  In  the  event  that  Sellers  or  Shareholders  notify  the
          Indemnified  Purchaser Party within the Notice Period that they desire
          to defend the Indemnified Purchaser Party against such claim or demand
          then,  except  as  hereinafter  provided,   Sellers  or  Shareholders,
          respectively, shall have the right to defend the Indemnified Purchaser
          Party by appropriate proceedings,  which proceedings shall be promptly
          settled or prosecuted  by them to a final  conclusion in such a manner
          as to  avoid  any risk of the  Indemnified  Purchaser  Party  becoming
          subject to liability for any other matter; provided,  however, Sellers
          and  Shareholders  shall not, without the prior written consent of the
          Indemnified  Purchaser  Party,  consent  to the entry of any  judgment
          against the  Indemnified  Purchaser Party or enter into any settlement
          or  compromise  which  does  not  include,  as an  unconditional  term
          thereof,  the giving by the claimant or  plaintiff to the  Indemnified
          Purchaser  Party of a release,  in form and substance  satisfactory to
          the  Indemnified  Purchaser  Party,  as the  case  may  be,  from  all
          liability in respect of such claim or litigation.  If any  Indemnified
          Purchaser Party desires to participate  in, but not control,  any such
          defense or settlement,  it may do so at its sole cost and expense. If,
          in the reasonable opinion of the Indemnified Purchaser Party, any such
          claim or demand or the  litigation  or resolution of any such claim or
          demand  involves  an issue or matter  which  could  have a  materially
          adverse  effect on the  business,  operations,  assets,  properties or
          prospects  of  the  Indemnified  Purchaser  Party,  including  without
          limitation the administration of the tax returns and  responsibilities
          under  the tax  laws of any  Indemnified  Purchaser  Party,  then  the
          Indemnified  Purchaser  Party  shall  have the  right to  control  the
          defense or settlement  of any such claim or demand and its  reasonable
          costs and  expenses  shall be included as part of the  indemnification
          obligation of Sellers and Shareholders hereunder;  provided,  however,
          that the  Indemnified  Purchaser Party shall not settle any such claim
          or  demand   without   the  prior   written   consent  of  Sellers  or
          Shareholders, which consent shall not be unreasonably withheld. If the
          Indemnified  Purchaser  Party  should  elect to  exercise  such right,
          Sellers or Shareholders shall have the right to participate  in, but 

                                       35

<PAGE>






          not  control,  the  defense or  settlement  of such claim or demand at
          their sole cost and expense.

               (c) (i) If  Sellers  or  Shareholders  elect  not to  defend  the
          Indemnified  Purchaser Party against such claim or demand,  whether by
          not giving the  Indemnified  Purchaser Party timely notice as provided
          above or otherwise, then the amount of any such claim or demand, or if
          the same be defended by Sellers or  Shareholders or by the Indemnified
          Purchaser  Party (but none of the  Indemnified  Purchaser  Party shall
          have any  obligation  to defend any such claim or  demand),  then that
          portion thereof as to which such defense is unsuccessful, in each case
          shall  be  conclusively  deemed  to  be a  liability  of  Sellers  and
          Shareholders  hereunder,  unless Sellers and  Shareholders  shall have
          disputed their liability to the Indemnified Purchaser Party hereunder,
          as  provided  in (a)  above,  in which  event  such  dispute  shall be
          resolved as provided in Section 4.5 hereof.

                    (ii) In the event an Indemnified Purchaser Party should have
               a claim against Sellers or  Shareholders  hereunder that does not
               involve a claim or demand being asserted  against or sought to be
               collected  from it by a third party,  the  Indemnified  Purchaser
               Party shall  promptly  send a Claim  Notice with  respect to such
               claim to Sellers  and  Shareholders.  If Sellers or  Shareholders
               dispute  their  liability  with  respect to such claim or demand,
               such  dispute  shall be resolved in  accordance  with Section 4.5
               hereof;  if Sellers or Shareholders do not notify the Indemnified
               Purchaser  Party within the Notice  Period that they dispute such
               claim,  the amount of such claim shall be  conclusively  deemed a
               liability of Sellers or Shareholders, respectively, hereunder.

               (d) All claims for indemnification by an Indemnified Seller Party
          under  this  Agreement  shall  be  asserted  and  resolved  under  the
          procedures  set forth  above  substituting  in the  appropriate  place
          "Indemnified  Seller  Party"  for  "Indemnified  Purchaser  Party" and
          variations thereof and "Purchasers" for "Sellers" and "Shareholders."

               (e) Each  party  shall  cooperate,  and  cause  their  respective
          affiliates to cooperate, in the defense or prosecution of any claim or
          demand  made by a  third  party  and  shall  furnish  or  cause  to be
          furnished  such  records,   information  and  testimony,  attend  such
          conferences,  discovery proceedings,  hearings, trials or appeals, and
          make such filings with governmental authorities,  as may be reasonably
          requested  in  connection   therewith.   Sellers  shall  reimburse  an
          Indemnified Purchaser Party for its out-of-pocket expenses,  including
          reasonable  attorneys fees and expenses,  incurred in connection  with
          this  provision  in  respect  of any  matter or claim  for which  such
          Indemnified  Purchaser  Party  has a right  of  indemnity  under  this
          Agreement, and Purchasers shall indemnify an Indemnified Seller Party

                                       36

<PAGE>






          for its out-of-pocket  expenses,  including  reasonable attorneys fees
          and expenses, incurred in connection with this provision in respect of
          any  matter or claim for which  such  Indemnified  Seller  Party has a
          right of indemnity under this Agreement.

               (f)  Notwithstanding  any of the foregoing  provisions in Section
          4.3 of this Agreement:

                    (i) In the  event  that any  claim  or  demand  relating  to
               Environmental  Liabilities for which Sellers or Shareholders  may
               be liable  hereunder  is  asserted,  Shareholders  shall have the
               option to assume exclusive  control of the resolution of any such
               claim or demand.  Except as set forth below,  Shareholders  shall
               have  satisfied  their  obligations  under  this  Agreement  with
               respect to any Environmental  Liabilities as regards any affected
               real property if the result of any  remediation  meets or exceeds
               the least stringent standards,  based on the use of such property
               at the Closing Date,  required to comply with  Environmental Laws
               as in  effect  on the  Closing  Date  (or,  at the  Shareholders'
               option,  as in effect on the date any  remediation is concluded);
               provided,  however,  that  Shareholders  agree to use  reasonable
               efforts  to obtain any  available  approval  from the  applicable
               governmental  authority  of  such  remediation.   Notwithstanding
               anything herein to the contrary,  Shareholders' obligations under
               this Agreement shall not be considered satisfied to the extent to
               which such "least stringent  standards"  criteria shall result in
               the creation of any obligation,  liability or duty on the part of
               an  Indemnified  Purchaser  Party as regards such  affected  real
               property.

                    (ii)  Each  Indemnified  Purchaser  Party  agrees to take no
               action  (such as, but not limited to, any  drilling or testing of
               the soil or ground  water)  and that each will not  affirmatively
               initiate any action by any  Indemnified  Purchaser Party or third
               party,  including any  governmental  agency or  authority,  which
               could  reasonably  be expected to lead to a claim with respect to
               any such  matter,  except in each case to the extent  believed by
               such Indemnified Purchaser Parties, in good faith, to be required
               by any Environmental Law.

                    (iii) Each  Indemnified  Purchaser Party agrees to maintain,
               to instruct its executive officers and directors to maintain, and
               to  require  each New Hire (as  hereafter  defined)  to execute a
               confidentiality    agreement   substantially   similar   to   the
               Confidentiality  Agreement  (as  hereafter  defined)  executed by
               Sellers' existing  employees.  For purposes of this provision,  a
               "New Hire" is any new employee of Met-Pro's Flex-Kleen division,

                                               37

<PAGE>






               other than a New  Employee  as  defined in Article 5 hereof.  The
               parties   acknowledge  that  Sellers'  existing   employees  have
               executed  confidentiality  agreements  (each  a  "Confidentiality
               Agreement")  with Sellers,  which at Closing shall be assigned to
               Purchasers.

                    (iv)  Notwithstanding  any  breach  by any  New  Hire or New
               Employee of his confidentiality  obligation,  the indemnification
               rights  of  an  Indemnified   Purchaser   Party  as  pertains  to
               environmental  matters  shall  not be deemed  waived  or  limited
               unless  Sellers  or  Shareholders   shall  demonstrate  that  the
               Indemnified  Purchaser  Party  conspired or acted in concert with
               such  breaching  New  Hire or New  Employee  in  regards  to such
               breach. In addition, notwithstanding any breach by an Indemnified
               Purchaser Party of its obligations under Section 4.3(f)(iii),  an
               Indemnified  Purchaser Party's  indemnification  rights hereunder
               shall not be deemed  waived or  limited  except to the  extent to
               which Sellers or  Shareholders  shall  establish that such breach
               was the proximate cause of the  governmental or other third party
               action.  Under no event shall an  Indemnified  Purchaser  Party's
               indemnification rights be deemed waived or limited for any action
               taken by Helser Industries, its successors and assigns, except to
               the extent to which an Indemnified Purchaser Party shall act with
               regard to Helser Industries, its successors and assigns in breach
               of Section 4.3(f)(ii) hereof.

                    (v) No obligation of an  Indemnified  Purchaser  Party under
               Section 4.3 (f)(iii)  shall be deemed  breached by (A) the filing
               by  Met-Pro  of a  copy  of  this  Agreement,  exclusive  of  the
               Disclosure  Schedules and Exhibits,  with any governmental agency
               pursuant  to a good faith  belief that such filing is required by
               law or (B) any  disclosure  made to any  governmental  agency  or
               other  third  party  to the  extent  believed  by the  disclosing
               Indemnified Purchaser Party, in good faith, to be required by any
               Environmental Law.

                    (vi) Sellers or Shareholders agree to use reasonable efforts
               to ensure that any actions  taken by Sellers or  Shareholders  or
               their  representatives  in  connection  herewith on property then
               occupied by  Purchasers  or their  successors  are performed in a
               manner which is not  disruptive  to the normal  operation of such
               property.   Sellers  or  Shareholders   shall  promptly   furnish
               Purchasers  and  its  successors  with  a  copy  of  any  written
               engineering,  environmental or other similar report pertaining to
               the property.

          4.4 Payment. Upon the determination of the liability under Section 4.3
     or 4.5 hereof,  the  appropriate  party shall pay to the other, as the case
     may be, within ten (10) calendar days after such determination,  the amount
     of any claim for indemnification made hereunder. The first $500,000 (five

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<PAGE>






     hundred thousand dollars) of Sellers' payment  obligations for claims under
     Section  4.1.1(a) hereof shall initially be satisfied with withdrawals from
     the Escrow Closing Payment held under the Escrow  Agreement.  Sellers shall
     directly pay Purchasers for claims under Section 4.1.1(b) and Section 4.1.1
     (c) hereof. In the event that the indemnified party is not paid in full for
     any such claim promptly after the other party's obligation to indemnify has
     been  determined  in  accordance   herewith,   it  shall  have  the  right,
     notwithstanding any other rights that it may have against any other person,
     firm or corporation, to set off the unpaid amount of any such claim against
     any amounts owed by it under any  agreements  entered into pursuant to this
     Agreement.  Upon the  payment  in full of any  claim,  either by set off or
     otherwise,  the entity making  payment shall be subrogated to the rights of
     the indemnified party against any person,  firm or corporation with respect
     to the subject matter of such claim.

          4.5 Arbitration.

               (a) All  disputes  under  this  Article  4 shall  be  settled  by
          arbitration in Philadelphia,  Pennsylvania, before a single arbitrator
          (the "Arbitrator")  pursuant to the rules of the American  Arbitration
          Association.  Arbitration  may be  commenced  at any time by any party
          hereto  giving  written  notice to each other party to a dispute  that
          such dispute has been referred to arbitration  under this Section 4.5.
          The Arbitrator shall be selected by the joint agreement of Sellers and
          Purchasers,  but if they do not so agree within twenty (20) days after
          the date of the notice referred to above,  the selection shall be made
          pursuant  to the rules from the panels of  arbitrators  maintained  by
          such  Association.  Any  award  rendered  by the  Arbitrator  shall be
          conclusive  and binding upon the parties  hereto;  provided,  however,
          that any such award shall be accompanied  by a written  opinion of the
          Arbitrator  giving the  reasons  for the  award.  This  provision  for
          arbitration  shall be specifically  enforceable by the parties and the
          decision of the  Arbitrator in accordance  herewith shall be final and
          binding  and there shall be no right of appeal  therefrom.  Each party
          shall pay its own  expenses  of  arbitration  and the  expenses of the
          Arbitrator shall be equally shared; provided,  however, that if in the
          opinion of the Arbitrator any claim for indemnification or any defense
          or objection thereto was  unreasonable,  the Arbitrator may assess, as
          part of his award, all or any part of the arbitration  expenses of the
          other  party  (including   reasonable  attorneys'  fees)  and  of  the
          Arbitrator against the party raising such unreasonable claim,  defense
          or objection.

               (b) To the extent that  arbitration may not be legally  permitted
          hereunder and the parties to any dispute hereunder may not at the time
          of such dispute  mutually agree to submit such dispute to arbitration,
          any  party  may  commence  a civil  action  in a court of  appropriate
          jurisdiction to resolve disputes hereunder. Nothing contained in this

                                       39

<PAGE>






          Section 4.5 shall  prevent the parties  from  settling  any dispute by
          mutual agreement at any time.

               (c) Sellers or  Shareholders  may apply to the  Arbitrator  for a
          written  determination  that  Purchasers  filed a Notice  of Claim (as
          defined  in  Section  4 of the  Escrow  Agreement)  in bad  faith  and
          principally  for the  purpose of  delaying  the  release to Sellers or
          Shareholders  of any portion of the Escrow Fund (as defined in Section
          1 of the Escrow Agreement). Upon such a determination,  the Arbitrator
          may  assess  against  Purchasers  all or any  part of the  arbitration
          expenses of Sellers or Shareholders  (including  reasonable attorneys'
          fees) and of the Arbitrator.

          4.6  Compliance  with  Bulk  Sales  Laws.  The  parties  hereby  waive
     compliance by Purchasers  and Sellers with the bulk sales law and any other
     similar laws in any applicable  jurisdiction in respect of the transactions
     contemplated  by  this  Agreement.   Purchasers,   jointly  and  severally,
     indemnify  Sellers and Shareholders  from, and hold them harmless  against,
     any liabilities,  damages, costs and expenses resulting from or arising out
     of (i) the  parties'  failure to comply with any of such laws in respect of
     the transactions contemplated by this Agreement, or (ii) any action brought
     or levy made as a result thereof,  other than those  liabilities which have
     been expressly assumed,  on such terms as expressly assumed,  by Purchasers
     pursuant  to this  Agreement.  It is agreed that the  Purchasers  shall not
     require Flex-Kleen Canada to comply, or to assist the Purchasers to comply,
     with the  requirements  of section 6 of the Retail Sales Tax Act (Ontario),
     or  such  other  comparable  legislation  in  other  provinces  as  may  be
     applicable to the transfer of the Assets used by  Flex-Kleen  Canada in the
     Business under this Agreement. Notwithstanding the foregoing, Sellers agree
     to indemnify and hold harmless the  Purchasers  from and against any claims
     which may be made or brought against the Purchasers or which the Purchasers
     may suffer or incur as a result of, in respect  of, or arising  out of such
     non-compliance.

          4.7 Calculation of Damages. (a) The Sellers and Shareholders shall not
     be liable  under  Section 4.1 hereof for (i) any Damages to the extent that
     the  Indemnified  Purchaser  Party has been  compensated  for such claim or
     matter  pursuant to Section 6.11 hereof or pursuant to any other  insurance
     proceeds realized by the Indemnified  Purchaser Party or its affiliates for
     such claim or matter,  (ii) consequential  Damages,  (iii) Damages for lost
     profits  incurred by the  Indemnified  Purchaser  Party,  or (iv)  punitive
     Damages.



                                       40

<PAGE>






               (b) Notwithstanding Section 4.7(a)(iii), Sellers and Shareholders
          shall be liable for Damages  for lost  profits for any claim or matter
          arising under Section 6.6(a) hereof.

               (c) Warranty  costs and claims arising after the Closing Date for
          product  sold  by  Sellers  prior  to  the  Effective  Date  shall  be
          calculated for purposes of determining  Damages in a manner consistent
          with Sellers' past  practices  during the twelve months ended July 31,
          1998.

          4.8 Exclusive Remedy. The indemnification  rights of the parties under
     this Article 4 shall be the sole and  exclusive  rights and remedies of the
     parties hereto for  misrepresentations  and breaches of representations and
     warranties  set  forth in  Article  3 hereof.  The  foregoing  shall not be
     deemed,  however, to limit the parties' rights and remedies as may exist in
     law, equity or otherwise for breach of any agreement or covenant hereunder.

          4.9 Goods and Services Gross-up On Indemnification. Where an amount is
     payable by an Indemnified  Purchaser  Party or Indemnified  Seller Party as
     indemnification  pursuant to the terms of this Agreement and the Excise Tax
     Act  (Canada)  provides  that GST is deemed to have been  collected  by the
     payee  thereof,  the amount so payable as determined  without  reference to
     this Section 4.9 (the  "Indemnification  Amount")  shall be increased by an
     amount  equal to the rate of GST applied to the  Indemnification  Amount in
     accordance with the Excise Tax Act (Canada).




                                    ARTICLE 5
                            EMPLOYEE BENEFIT MATTERS

          5.1 Employees and Offers of Employment.

               (a) Purchasers  shall make offers of employment as of the Closing
          Date to all of the  employees  who work for the  Business  immediately
          prior to the Closing  Date for  positions  similar to those  performed
          immediately  prior to the Closing Date (i) at their  current  salaries
          and (ii) on such other terms and conditions  which, for a period of no
          less  than  one  year  following  the  Closing  Date,  will be no less
          favorable in the  aggregate to those  generally  provided to similarly
          situated employees of Purchasers. All employees who accept such offers
          of employment shall be referred to herein as "New Employees."  Subject
          to the provisions  hereof,  all New Employees will become employees of
          Purchasers on the Closing Date, except that any employee of the

                                       41

<PAGE>






          Business who is inactive  (including without limitation  employees who
          are disabled) as of the Closing Date will become a New Employee  after
          such  employee  returns  to work on the  earlier  of (i) the date such
          employee   becomes   eligible  to  participate  in  life,   short-term
          disability and health plans of Purchasers or their affiliates and (ii)
          the tenth  business  day  following  such  employee  returns  to work.
          Purchasers shall promptly  reimburse  Sellers for the costs associated
          with such employee  including  salary and cost of benefits between the
          date such employee  returns to work and the date such employee becomes
          a New Employee. The date an employee becomes an employee of Purchasers
          is a "Hire  Date."  Nothing  in this  Article 5 or  elsewhere  in this
          Agreement is intended to confer upon any employee of Sellers any right
          to  continued  employment  by  Purchasers  and it is  understood  that
          Purchasers shall employ any such person on an "at will" basis.

               (b)  Notwithstanding  anything  in Section  5.1 (a) herein to the
          contrary,  Met-Pro  Canada at Closing shall offer  employment on terms
          and conditions which shall not trigger any severance obligations under
          Canadian,  statutory or common law or otherwise  (excepting,  however,
          any  obligation  under the AWT Air  Severance Pay Plan) to Maurice and
          Joan Hamilton, and Purchasers shall be jointly and severally liable to
          pay any severance  payment under  Canadian  statutory or common law or
          otherwise  (excepting,  however,  any  payment  due  under the AWT Air
          Severance  Pay Plan) to Maurice and Joan Hamilton for years of service
          accrued  as an  employee  of  Flex-Kleen  Canada as of the date of the
          Closing.  Purchasers  shall solely assume the defense of any claim for
          severance  brought by such persons  following  Closing,  whether under
          statutory or common law or otherwise (excepting,  however, the AWT Air
          Severance  Pay  Plan),  and shall be solely  liable  for the costs and
          expenses including legal fees in connection with any such claim. Prior
          to  Closing,   except  for  the  transactions   contemplated  by  this
          Agreement, Sellers shall take no act which would trigger any severance
          obligation  under  Canadian,  statutory  or common law or otherwise to
          Maurice and Joan Hamilton.

               (c) Prior to Closing, Sellers agree to give written notice to its
          employees not eligible as of Closing for  post-retirement  benefits of
          the termination and unavailability of post-retirement benefits, and of
          the  elimination of any benefits under the AWT Air Severance Pay Plan,
          and to provide evidence of same at Closing to Purchasers.

          5.2 Non-Solicitation.

               (a) Until the third anniversary of the Closing Date,  Sellers and
          Shareholders  will  not,  directly  or  indirectly,  solicit  or offer
          employment  to any person  who,  after the  Closing  Date,  is then an
          employee  of  Purchasers,   or  who  has  terminated  employment  with
          

                                       42

<PAGE>






          Purchasers  without the consent of Purchasers  within 180 days of such
          solicitation or offer.

               (b) Until the third  anniversary of the Closing Date,  Purchasers
          will  not,  and  will  cause  their  affiliates  not to,  directly  or
          indirectly,  solicit or offer  employment to any person who, after the
          Closing  Date,  is then an  employee  of  Sellers or an  affiliate  of
          Sellers or who has terminated employment with Sellers or any affiliate
          of Sellers without the consent of Sellers or such affiliate of Sellers
          within 180 days of such solicitation or offer.

          5.3 Vacation  Credit.  From and after the Closing Date,  New Employees
     shall be entitled to use their unused vacation benefits earned as employees
     of Sellers after January 1, 1998 under Sellers' vacation  arrangements that
     were in effect as of January 1, 1998.  All  vacation  benefits  of Sellers'
     employees earned as of December 31, 1997,  including but not limited to any
     equitable  adjustments  made or granted  during  1998 for prior  service to
     Sellers,  not used or paid in the ordinary  course of business prior to the
     Effective Date shall be paid by Sellers to such employees within sixty (60)
     days of the Closing Date in accordance with Exhibit 5.3.

          5.4 COBRA.  Subsequent to the Closing Date, Purchasers shall be liable
     for continuation of health care coverage required by Code Section 4980B and
     ERISA Section 601 through 608 ("COBRA") with respect to New Employees,  and
     Sellers shall be liable for health care continuation  required by COBRA for
     any of their employees who are not New Employees.  Purchasers  shall ensure
     that any COBRA  requirements are met with respect to any "qualifying event"
     with  respect  to a New  Employee  (and  covered  family  members  of a New
     Employee) occurring on or after the Closing Date. Sellers shall ensure that
     any COBRA  requirements are met with respect to any "qualifying event" with
     respect  to  Sellers'   employees  (and  covered  family  members  of  such
     employees)  who do not  become  New  Employees  occurring  on or after  the
     Closing Date.  Prior to or on the Closing,  Sellers shall give  appropriate
     written  notices to their  respective  employees  of the Business as to the
     occurrence of the transactions contemplated by this Agreement.

          5.5 Health Care and Prescription Benefits; Other Employee Benefits.

               (a) All health care and prescription  claims incurred by Sellers'
          employees  between the Effective Date and the Closing Date and between
          the  Closing  Date and  October  31,  1998 shall be paid  pursuant  to
          Sellers' insurance policies or Sellers'  self-insurance  plans subject
          to no deductible.  At Closing,  Purchasers shall reimburse Sellers for
          the portion of the health care and prescription  plan "deemed premium"
          for Sellers'  employees for the period  between the Effective Date and
          September  30, 1998, in an amount  consistent  with and based upon the
          per month  premium  charges to  Flex-Kleen  during the period  between
          November 1, 1997 and the Effective  Date,  pursuant to Schedule 5.5(a)
          (the "Closing Health Care and Prescription Plan Premium  Reimbursement
          Payment"). After Closing, Purchasers shall similarly reimburse Sellers
          on the same basis,  for the period October 1, 1998 through October 31,
          1998,  within  fifteen  (15) days after being  provided  with  written
          documentation  adequately supporting such charge. For purposes of this
          Section  5.5(a),  "deemed  premium"  shall be the amount  allocated by
          Sellers to the health care and prescription plan covering employees of
          the Business for purpose of funding claims under such plan, consistent
          with  Sellers'  past  practices  for same during the nine months ended
          July 31, 1998.



                                       43
<PAGE>



               (b) In  addition  to the  reimbursement  provided  for by Section
          5.5(a)  hereof,   Purchasers   shall  reimburse   Sellers  for  actual
          out-of-pocket   costs   for   other   employee   benefits   or   other
          employment-benefit   related  costs  during  the  period  between  the
          Effective  Date and the  Closing  Date and  from the  Closing  Date to
          October  31, or with  respect to  employees  who were  inactive on the
          Effective Date, the date of such employees return to work,  consistent
          with the cost of such  charges  during the one year period  ended with
          the Effective Date. At Closing, Purchasers shall reimburse Sellers for
          these charges for the period  between the Effective Date and September
          30,1998,  pursuant to  Schedule  5.5(c) (the  "Closing  Benefits  Cost
          Reimbursement  Payment").  After Closing,  Purchasers  shall similarly
          reimburse  Sellers on the same basis,  for the period  October 1, 1998
          through  October  31,  1998,  within  fifteen  (15) days  after  being
          provided with written documentation adequately supporting such charge.

          5.6 Allocation of Liability.

               (a)  Except  as set forth in this  Article  5, in  Section  1.4.2
          hereof or as elsewhere  herein set forth,  as of the Closing Date, (i)
          Purchasers  shall assume all  liabilities in respect of employees that
          are  recorded on the  Effective  Date Pro Forma  Balance  Sheet to the
          extent not  satisfied  prior to the Closing  Date and all  liabilities
          incurred after the Effective Date,  (ii) all  liabilities  incurred in
          the normal  course of the  Business  with  respect to employees of the
          Business  between the  Effective  Date and the Closing  Date and (iii)
          Purchasers  shall have sole  liability and  responsibility  for and in
          respect of all  obligations to New Employees  arising on and after the
          Closing Date, and Purchasers shall indemnify and hold harmless Sellers
          in respect of each of the foregoing.

               (b)  Except  as  set  forth  herein,  Sellers  shall  retain  all
          obligations and  liabilities and have sole liability for  obligations,
          including  obligations arising under any employee benefit plan and any
          lawsuits  or  claims,  relating  to or  arising  with  respect  to any
          employee of the Business, including any person who has retired from or
          terminated  employment  with Sellers,  arising or  attributable to any
          time prior to the  Effective  Date and with respect to any employee of
          Sellers after the Closing Date other than a New Employee.

          5.7 Service Credit and Pre-existing Conditions.

               (a)  Purchasers  or one of their  affiliates  will  recognize all
          prior service with Sellers or any of their affiliates of New Employees
          solely  for  eligibility  and  vesting  purposes  in  regard  to those
          employee  benefit  plans  in  which  New  Employees  are  enrolled  by
          Purchasers or one of their  affiliates  immediately  after the Closing
          Date.

               (b)  Purchasers,  to the extent  allowable  under its agreements,
          agree to waive any restrictions  under the health and welfare plans of
          either  Purchaser or any  affiliate  thereof with respect to those New
          Employees  who  are  no  longer   subject  to  Sellers'   pre-existing
          limitation  provisions on the Closing Date.  With respect to those New
          Employees  who  are  subject  to  Sellers'   pre-existing   limitation
          provisions on the Closing Date,  Purchasers'  pre-existing  limitation
          provisions shall lapse on the date such limitations  would have lapsed
          under Sellers'  applicable plans had the New Employee  remained in the
          employ  of  either  Seller  or an  affiliate  thereof,  to the  extent
          allowable under Purchasers' agreements.

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<PAGE>






          5.8 Savings Plans.

               (a)  Effective as of the Closing  Date,  Sellers  shall amend the
          Aqua Alliance  Savings and Retirement Plan (the "Seller Savings Plan")
          to cause the account balances of each New Employee  thereunder to vest
          as of each  employee's  respective Hire Date and to cause their active
          participation  in  the  Seller  Savings  Plan  to  cease  as of  their
          respective Hire Dates.

               (b) On or  immediately  prior to the Closing Date,  Met-Pro shall
          (i) establish or designate one or more qualified defined  contribution
          plans  (the  "Buyer  DC  Plans")  for  the  benefit  of New  Employees
          excepting  Maurice and Joan Hamilton ("New American  Employees"),  and
          furnish Sellers with the most recent  favorable  determination  letter
          from the Internal  Revenue  Service  relating to the Buyer DC Plans as
          promptly as practicable, (ii) take any necessary action to qualify the
          Buyer DC Plans under the  applicable  provisions of the Code and (iii)
          make all filings and submissions to appropriate  governmental agencies
          required of it in  connection  with a transfer of assets as  described
          below.  All New American  Employees who are eligible to participate in
          the Seller  Savings Plan shall become  eligible to  participate in the
          Buyer DC  Plans  as of  their  respective  Hire  Dates,  and  shall be
          credited with  eligibility  service and vesting service for all period
          of service with Sellers,  their affiliates or any other entity,  if so
          credited with such service under the Seller Savings Plan.

               (c) As soon as  practical  following  receipt by  Purchasers  and
          Sellers   of   favorable    determination   letters   or   Purchasers'
          certification to Sellers, and Sellers' certification to Purchasers, in
          a manner  reasonably  acceptable to both Purchasers and Sellers,  that
          the Seller Savings Plan and the Buyer DC Plans are qualified under the
          applicable  provisions of the Code, Sellers shall cause the trustee of
          the Seller  Savings  Plan to  transfer  assets  representing  the full
          account  balances of the New  American  Employees,  together  with the
          appropriate net investment return (including  unrealized  appreciation
          or  depreciation)  thereon,   reduced  by  any  necessary  benefit  or
          withdrawal payments made in respect of New American Employees prior to
          the actual date of transfer, to the trustee of the Buyer DC Plans.

          5.9 Employee Benefit Plans.  Purchasers shall not assume any liability
     for any employee benefit plan sponsored or maintained by Sellers, nor shall
     Purchasers  assume or be liable  for any  liability  or  obligation  to any
     employee of Sellers or New Employee  relating to any such employee  benefit
     plan, except for the  reimbursement  obligation under Section 5.5(c) hereof
     with respect to contributions by Sellers under such plans during the period
     between the  Effective  Date and the Closing Date. No portion of the assets
     of any employee benefit plan heretofore  sponsored or maintained by Sellers
     (and no amount  attributable  to any such  plan)  shall be  transferred  to
     Purchasers,  and Purchasers shall not be required to continue any such plan
     after the  Closing  Date.  The  amounts  payable on account of all  benefit
     arrangements shall be determined with reference to the date of the event by
     reason of which such amounts become  payable,  without regard to conditions
     subsequent, and Purchasers shall not be liable for any claim for insurance,
     reimbursement or other benefits payable by reason of any event which occurs
     prior to the Closing Date. All amounts payable directly to employees, or to
     any fund,  program,  arrangement  or plan  maintained by Sellers  therefor,
     shall be paid by  Sellers  within a  reasonable  period  of time  after the
     Closing Date to the extent that such payment is not  inconsistent  with the
     terms of such fund, program, arrangement or plan.



                                       45

<PAGE>






                                    ARTICLE 6
                          CERTAIN POST CLOSING MATTERS

          6.1  Discharge  of  Business  Obligations.  From and after the Closing
     Date, Sellers shall pay and discharge, in accordance with past practice but
     not less than on a timely basis,  all obligations and liabilities  incurred
     prior to the Effective  Date in respect of the Business,  its operations or
     the assets and properties used therein (except for those expressly  assumed
     by  Purchasers  hereunder  pursuant to Section  1.4.1),  including  without
     limitation any  liabilities or obligations to employees,  trade  creditors,
     vendors,  representatives,  customers and clients of the Business inclusive
     of PostRetirement  Benefits,  Employee Retention  Agreements and Employment
     Termination Agreements.

          6.2 Maintenance of Books and Records; Cooperation. Each of Sellers and
     Purchasers  shall preserve until the tenth  anniversary of the Closing Date
     all records  possessed or to be possessed by such party  relating to any of
     the assets,  liabilities  or business of the Business  prior to the Closing
     Date (including,  without limitation, all records relating to the filing of
     all Tax  returns,  the  making  of any  election  relating  to  Taxes,  the
     preparation for any audit by any taxing  authority,  and the prosecution or
     defense of any claim,  suit or proceeding  relating to any Tax).  After the
     Closing Date, where there is a legitimate purpose, such party shall provide
     the other  parties  with  access,  upon prior  reasonable  written  request
     specifying the need therefor,  during regular  business  hours,  to (i) the
     officers  and  employees  of such party and (ii) the books of  account  and
     records of such party,  but, in each case,  only to the extent  relating to
     the assets,  liabilities  or business of the Business  prior to the Closing
     Date, and the other parties and their  representatives shall have the right
     to make  copies of such  books and  records;  provided,  however,  that the
     foregoing  right of access  shall not be  exercised  in such a manner as to
     interfere  unreasonably  with the normal  operations  and  business of such
     party;  and further,  provided,  that, the requesting  party, its officers,
     directors  and  representatives  shall not  disclose  such  information  as
     constitutes  trade secrets or  confidential  business  information  of such
     party,  except (i) as required by law, (ii) with the prior written  consent
     of such party, which consent shall not be unreasonably  withheld,  or (iii)
     where  such  information  becomes  available  to the public  generally,  or
     becomes generally known to competitors of such party, through sources other
     than the requesting  party,  its  affiliates or its officers,  directors or
     representatives.  Sellers and Purchasers shall cooperate with each other in
     the conduct of any audit or other  proceeding  relating to Taxes  involving
     the Assets or the Business, including without limitation, providing any tax
     returns,  supporting  schedules  and other  related  documents  that may be
     reasonably requested.



                                       46

<PAGE>






          6.3 Payments  Received.  Sellers and Purchasers  each agree that after
     the Closing  they will hold and will  promptly  transfer and deliver to the
     other,  from time to time as and when  received by them,  any cash,  checks
     with appropriate  endorsements (using their commercially reasonable efforts
     not to convert  such  checks into cash),  or other  property  that they may
     receive on or after the Closing which properly  belongs to the other party,
     including without  limitation any insurance proceeds and any tax refunds or
     credits (and  interest  thereon,  if any)  referred to in Section  1.1.2(c)
     hereof,  and will  account to the other for all such  receipts.  Purchasers
     shall send written  notice to Sellers  within fifteen (15) calendar days of
     the  receipt  by  Purchasers  of any tax  refund  or credit  (and  interest
     thereon,  if any)  referred to in Section  1.1.2(c).  Such notice shall set
     forth the amount received, the date of receipt, and the matter to which the
     refund or credit relates. From and after the Closing, Purchasers shall have
     the right and authority to endorse without  recourse the name of Sellers on
     any check or any other evidences of indebtedness  received by Purchasers on
     account of the Business and the Assets transferred to Purchasers hereunder.

          6.4 Use of Name.

               (a) From and after the Closing  Date,  Sellers  and  Shareholders
          will sign such consents and take such other action as Purchasers shall
          reasonably  request  in order to  permit  Purchasers  to use the names
          "Flex-Kleen  Corporation,"  "Flex-Kleen  Canada  Limited" and variants
          thereof.  From and after the Closing Date, except as set forth in this
          Section 6.4, Sellers and Shareholders will not use or do business,  or
          assist any third party in using or doing business,  under the names or
          marks  "Flex-Kleen  Corporation,"  "Flex-Kleen  Canada Limited" or any
          names or marks similar thereto or being a variant thereof.

               (b) After the Closing, affiliates of Sellers shall have the right
          to use existing  materials  owned by such  affiliates that contain the
          name of Sellers  until the  earlier of (i) one year after the  Closing
          Date and (ii)  the date  existing  stocks  are  exhausted.  After  the
          Closing,  Purchasers  shall have the right to use existing  packaging,
          labeling, containers,  supplies, advertising materials, technical data
          sheets,  and all such other  materials  that  contain  the name "Air &
          Water Technologies  Corporation"  ("AWT") until the earlier of (i) one
          year  after the  Closing  Date and (ii) the date  existing  stocks are
          exhausted.

               (c)  Affiliates  of Sellers  shall have the right to use Sellers'
          names  and  marks  in  advertising  that  cannot  be  changed  by such
          affiliates  using  reasonable  efforts  for a period not to exceed one
          year after the Closing  Date.  Purchasers  shall have the right to use
          the names and marks of AWT in  advertising  that  cannot be changed by
          Purchasers  using  reasonable  efforts  for a period not to exceed one
          year after the Closing Date.

                                       47

<PAGE>







               (d) Notwithstanding  anything in Section 6.4 (b) to the contrary,
          affiliates  of Sellers  shall not be obligated to change the names and
          marks of Sellers on goods (i) used solely on an internal basis or (ii)
          in the  hands of  customers  at the time of the  expiration  of a time
          period  set forth in  subsection  (b) above.  Purchasers  shall not be
          obligated  to  change  the  names  and  marks of AWT on goods (i) used
          solely on an internal  basis or (ii) in the hands of  customers at the
          time of the  expiration of a time period set forth in  subsection  (b)
          above.  The  obliteration  of the  names  and  marks  shall be  deemed
          compliance  with the covenant not to use the names and marks  pursuant
          to this Section 6.4.

               (e) Purchasers  acknowledge and agree that they are not obtaining
          any rights hereunder to use the mark  "Research-Cottrell" and variants
          thereof the globe logo associated with such mark or any other marks or
          rights  conveyed  by Aqua  Alliance  and/or  its  affiliates  to Hamon
          pursuant to the Asset and Stock Purchase  Agreement between AWT (n/k/a
          Aqua  Alliance) and Hamon dated as of June 6, 1998 and that any use by
          Purchasers of such marks or logos only shall be pursuant to the letter
          agreement  dated the date hereof between  Met-Pro and Hamon, a copy of
          which is attached as Exhibit 6.4(e).

               (f) Shareholders  agree to use reasonable  efforts to cease using
          the marks of Sellers on buildings, cars, trucks and other fixed assets
          as soon as  possible,  and in any event by no later than  January  31,
          1999.

          6.5 UCC  Matters.  From and  after  the  Closing  Date,  Sellers  will
     promptly refer all inquiries with respect to ownership of the Assets or the
     Business to  Purchasers.  In addition,  Sellers will execute such documents
     and financing  statements  as  Purchasers  may request from time to time to
     evidence  transfer of the Assets to  Purchasers,  including  any  necessary
     assignments of financing statements.

          6.6 Covenant Not to Compete.

               (a) From and after the  Closing,  for a period of five years from
          the date  thereof,  Sellers and  Shareholders  shall not,  directly or
          indirectly,  own, manage, operate, join, control or participate in the
          ownership,  management,  operation or control of, any business whether
          in corporate,  proprietorship or partnership form or otherwise as more
          than a five  percent  owner  in such  business,  where  such  business
          competes  with  the   Business.   The  parties   hereto   specifically
          acknowledge  and agree  that the  remedy at law for any  breach of the
          foregoing will be inadequate and that the  Purchasers,  in addition to
          any other relief available to them, shall be entitled to temporary and
          permanent  injunctive  relief  without the necessity of proving actual
          damage. In the event that the provisions of this Section 6.6(a) should
          ever be deemed to exceed the limitation provided by applicable law,

                                       48

<PAGE>






          then the parties hereto agree that such  provisions  shall be reformed
          to set forth the maximum limitations permitted.

               (b)  Notwithstanding  anything in Section 6.6(a) to the contrary,
          (i) Metcalf & Eddy, Inc. and its successors may continue to market and
          sell  fugitive  emissions  monitoring  equipment  and  services to oil
          refineries and other clients (including, without limitation,  fugitive
          emissions monitoring,  inventory and tagging field services,  database
          products  and  programming   services,   fugitive   emissions  related
          hardware, including air monitoring equipment, identification tags, and
          data collection  equipment),  (ii) Shareholders and their subsidiaries
          may continue to carry on their  businesses  (other than the  Business)
          consistent  with  prior  practice  and  (iii)  Shareholders  and their
          subsidiaries  may  perform  any of  their  respective  obligations  in
          respect of any Excluded Asset or Excluded  Liability,  in each case as
          provided or contemplated by this Agreement.

          6.7 Contracting of  Non-Assignable  Customer  Contracts.  In the event
     that any of the  contracts  that Sellers  have with any of their  customers
     shall not be assignable to Purchasers,  Sellers agree following  Closing to
     contract  with  Purchasers,  at no  additional  cost  or  mark-up,  for the
     performance of Sellers'  respective  obligations  under such contracts,  in
     accordance with the terms thereof.

          6.8  Auditor's  Consent.  Sellers agree to use  reasonable  commercial
     efforts to cause McGladrey and Pullen, Sellers' auditors, from time to time
     to provide their  written  consent to the inclusion of the October 31, 1997
     Financial  Statements and the July 31, 1998 Financial Statements in Section
     3.1.6  hereof in any filings made by  Purchasers  with the  Securities  and
     Exchange  Commission  (the "SEC") after the Closing,  where in  Purchasers'
     reasonable judgment the SEC's rules or regulations require such inclusion.

          6.9 Right to Use Network in  Connection  with EMS  Accounting  System.
     Until January 31, 1999, Purchasers shall have the right to utilize Sellers'
     worldwide  access  network,   at  no  charge,  for  communication   between
     Flex-Kleen's  Sharpsburg,  NC, Markham, Ontario and Itasca, IL locations in
     connection with the EMS Accounting System.

          6.10  Transfer  of  Permits.  Sellers  each agree to use  commercially
     reasonable   efforts  to  cooperate  with  Purchasers  in  connection  with
     Purchasers'  application  for the  transfer,  renewal  or  issuance  of any
     permits,   licenses,   approvals  or  other  authorizations  involving  the
     Business.

          6.11 Insurance.  Except for health care and prescription  claims which
     shall be  resolved  as set  forth in  Section  5.5  hereof,  if,  after the
     Closing, Purchasers shall suffer any loss, arising between the Effective

                                       49

<PAGE>






     Date and the Closing Date,  out of a third-party  claim or otherwise,  that
     Purchasers  in good faith notify  Sellers would be covered by any insurance
     policy  (including,  but not limited to, any  general  liability  insurance
     policy) maintained by or for the benefit of Sellers,  Sellers shall present
     and pursue with commercially  reasonable  efforts a claim for payment under
     such policy in respect of such loss, and pay to Purchasers the proceeds, if
     any, of such claim, net of applicable deductibles, under any such policy as
     reimbursement  in respect of such loss,  subject to the  provisions of this
     Section 6.11.

          6.12 Straddle Taxes. All real property taxes,  personal property taxes
     and similar ad valorem  obligations levied with respect to the Assets for a
     taxable  period  which  includes  (but  does not end on) the  Closing  Date
     (collectively,  the "Apportioned Obligations") shall be apportioned between
     Sellers and  Purchasers  based on the number of days of such taxable period
     included in the  Pre-Effective  Date Straddle Tax Period (as defined below)
     and the number of days of such  taxable  period  after the  Effective  Date
     (with respect to any such taxable period, the "Post-Effective Date Straddle
     Tax  Period").  "Pre-Effective  Date Straddle Tax Period" means (i) any tax
     period  ending on or before the  Effective  Date and (ii) with respect to a
     tax period that  commences  before but ends after the Effective  Date,  the
     portion of such period up to and  including  the  Effective  Date.  Sellers
     shall  be  liable  for  the  proportionate  amount  of such  taxes  that is
     attributable to the Pre-Effective  Date Straddle Tax Period, and Purchasers
     shall  be  liable  for  the  proportionate  amount  of such  taxes  that is
     attributable to the Post-Effective  Date Straddle Tax Period.  Upon receipt
     of any bill for real or  personal  property  taxes  relating to the Assets,
     each of Sellers  and  Purchasers  shall  present a  statement  to the other
     setting forth the amount of  reimbursement  to which each is entitled under
     this Section 6.12 together with such  supporting  evidence as is reasonably
     necessary to calculate the proration amount.  The proration amount shall be
     paid by the party owing it to the other within ten (10) calendar days after
     delivery of such statement.  In the event that either Sellers or Purchasers
     shall make any payment for which it is entitled to reimbursement under this
     Section 6.12, the other party shall make such reimbursement promptly but in
     no event  later than ten (10)  calendar  days after the  presentation  of a
     statement setting forth the amount of reimbursement to which the presenting
     party is entitled  along with such  supporting  evidence  as is  reasonably
     necessary to calculate the amount of reimbursements.

          6.13 Income Tax; Financial Reporting.

               (a) The  parties  agree  that all  items of  income  and  expense
          relevant  to the  calculation  of  taxable  income  and the income tax
          liability with respect to or attributable to the Business,  the Assets
          and the operation  thereof for the period  between the Effective  Date
          and  the  Closing  Date  will,  for  all  tax  purposes,  be  reported
          

                                               50

<PAGE>






          exclusively  by  Sellers,   and  that  Sellers  shall  be  exclusively
          responsible  for  the  payment  of  any  and  all  federal,  Canadian,
          Provincial,  state,  local or other foreign income taxes  attributable
          thereto,  whether based on net or gross income. Such tax liability and
          expense  shall  not be  considered  an  expense  of the  Business  for
          purposes  of the  Closing and Final  Closing  Cash Flow  Reimbursement
          Statements referred to in Section 1.3.5 hereof.

               (b) The parties  agree that for purposes of Aqua  Alliance's  and
          Met-Pro's respective financial reporting requirements to the SEC, Aqua
          Alliance shall exclusively report the sales and earnings  attributable
          to the  operation of the  Business  for the period from the  Effective
          Date  through  September  25,  1998 (the  closing  date of Sellers and
          Shareholders  for the fiscal  month of  September  1998),  and Met-Pro
          shall  exclusively  report the sales and earnings  attributable to the
          operation of the Business for the period beginning September 26, 1998.

               (c) Nothing  contained  in Section  6.13(a)  and Section  6.13(b)
          shall be construed  to in any way alter the intent or intended  effect
          of  Section  2.6  hereof  (relating  to  the  Effective  Date  of  the
          transactions contemplated by this Agreement).

          6.14  Markham  Facilities.  Purchasers  understand  that  there  is no
     existing lease for Sellers' occupancy of the Markham Facilities and Sellers
     in no way represent  that they shall assist  Purchasers in its occupancy of
     the Markham  Facilities.  Purchaser shall be responsible for all agreements
     with the landlord and tenant at the Markham Facilities.





                                    ARTICLE 7
                                  MISCELLANEOUS

          7.1 Brokers' and Finders' Fees.

               (a) Except for any fees due to Lazard  Freres & Co.,  LLC,  which
          Sellers  agree to be solely  responsible  for,  Sellers  represent and
          warrant to Purchasers that all negotiations relative to this Agreement
          have been carried on by them directly  without the intervention of any
          person who may be entitled to any fee,  brokerage  or finder's  fee or
          other  commission in respect of this Agreement or the  consummation of
          the transactions  contemplated  hereby, and Sellers agree to indemnify
          and hold  harmless  Purchasers  against  any and all  claims,  losses,
          liabilities and expenses which may be asserted against or incurred by

                                               51

<PAGE>






          them as a result of Sellers' dealings, arrangements or agreements with
          any such person.

               (b)  Except  for any fees  due to  Howard,  Lawson  & Co.,  which
          Purchasers agree to be solely  responsible for,  Purchasers  represent
          and warrant that all negotiations relative to this Agreement have been
          carried on by them directly without the intervention of any person who
          may be  entitled  to any  fee,  brokerage  or  finder's  fee or  other
          commission  in respect of this  Agreement or the  consummation  of the
          transactions  contemplated  hereby,  and Purchasers agree to indemnify
          and  hold  harmless  Sellers  against  any  and  all  claims,  losses,
          liabilities and expenses which may be asserted  against or incurred by
          them as a result of Purchasers'  dealings,  arrangements or agreements
          with any such person.

          7.2 Sales, Transfer and Documentary Taxes, etc. Sellers and Purchasers
     shall share  equally all  federal,  Canadian,  Provincial,  state and local
     sales, documentary and other transfer taxes, if any, due as a result of the
     purchase,  sale or transfer of the Assets or the  assumption of the Assumed
     Liabilities in accordance herewith, without regard to upon which party such
     taxes may be imposed by law. To the extent  permitted by applicable  law or
     regulation,  Purchasers  will,  at their own  expense,  file all  necessary
     returns and other  documentation  with  respect to all such taxes and fees,
     and to the  extent to which any such  return or  documentation  must  under
     applicable law or regulation be filed by Sellers, Sellers agree to do so at
     their own expense.  At Closing,  Flex-Kleen Canada and Met-Pro Canada shall
     jointly  execute and file an election  (a) under  subsection  167(1) of the
     Excise Tax Act  (Canada)  and any similar  provincial  legislation,  in the
     prescribed  manner and form,  that no GST, QST or HST be payable in respect
     of the Assets of Flex-Kleen Canada transferred under this Agreement and (b)
     under Section 22 of the Income Tax Act (Canada) and any similar  provincial
     legislation  with respect to any accounts  receivable of Flex-Kleen  Canada
     transferred  to Met-Pro  Canada under this  Agreement.  Met-Pro  Canada and
     Flex-Kleen Canada shall file all necessary  elections or filings under this
     Section 7.2 in compliance with all relevant tax legislation.

          7.3 Expenses.  Except as otherwise  provided in this  Agreement,  each
     party hereto shall pay its own expenses  incidental to the  preparation  of
     this  Agreement,  the carrying out of the  provisions of this Agreement and
     the consummation of the transactions  contemplated  hereby. No such expense
     of any  Seller  or  Shareholder  shall be deemed  to be an  expense  of the
     Business for purposes of the Closing Cash Flow Reimbursement Payment or the
     Pro Forma or Final Closing Cash Flow Statements.

          7.4 Contents of Agreement;  Parties in Interest;  etc. This  Agreement
     sets forth the entire  understanding  of the parties hereto with respect to
     the transactions  contemplated  hereby. It shall not be amended or modified
     except by written instrument duly executed by each of the parties hereto.

                                               52

<PAGE>






     Any and all previous  agreements  and  understandings  between or among the
     parties  regarding the subject matter hereof,  whether written or oral, are
     superseded by this Agreement.

          7.5  Assignment.  All of the terms and  provisions  of this  Agreement
     shall be binding upon and inure to the benefit of and be enforceable by the
     respective successors and assigns of Shareholders, Sellers and Purchasers.

          7.6 Amendments and Waiver.  (a) Any provision of this Agreement may be
     amended or waived if, but only if, such  amendment  or waiver is in writing
     and is  signed,  in the  case  of an  amendment,  by  each  party  to  this
     Agreement, or in the case of a waiver, by the party against whom the waiver
     is to be effective.

               (b) No  failure  or delay by any party in  exercising  any right,
          power or privilege  hereunder  shall  operate as a waiver  thereof nor
          shall any single or partial  exercise  thereof  preclude  any other or
          further exercise thereof or the exercise of any other right,  power or
          privilege. The rights and remedies herein provided shall be cumulative
          and not exclusive of any rights or remedies provided by law.

          7.7 Notices. Any notice, request, demand, waiver, consent, approval or
     other  communication  which is required or permitted  hereunder shall be in
     writing and shall be deemed given only if delivered  personally  or sent by
     telecopy or by registered or certified mail, postage prepaid, as follows:

         If to Purchasers, to:

                                    William L. Kacin, President
                                    Met-Pro Corporation
                                    160 Cassell Road
                                    Harleysville, PA 19438
                                    Telecopy: (215) 723-6226

          With a required copy (which shall not constitute notice) to:

                                    Jeffrey H. Nicholas, Esq.
                                    Fox, Rothschild, O'Brien & Frankel, LLP
                                    997 Lenox Drive
                                    Lawrenceville, NJ 08648
                                    Telecopy: (609) 896-1469


                                               53

<PAGE>






          If to Sellers or Shareholders, to:

                                    Aqua Alliance, Inc.
                                    800 Third Avenue, 38th Floor
                                    New York, New York 10022
                                    Attention: General Counsel
                                    Telecopy: (212) 702-2709/2710

          With a required copy (which shall not constitute notice) to:

                                    Davis Polk & Wardwell
                                    450 Lexington Avenue
                                    New York, New York 10017
                                    Attention: John A. Bick, Esq.
                                    Telecopy: (212) 450-4800

     or to such other address as the  addressee  may have  specified in a notice
     duly given to the sender as provided herein. Such notice, request,  demand,
     waiver,  consent,  approval or other  communication  will be deemed to have
     been given as of the date so delivered, telecopied or mailed.

          7.8 Delaware Law to Govern.  This  Agreement  shall be governed by and
     interpreted  and  enforced  in  accordance  with the  laws of the  State of
     Delaware, without regard to the conflicts of laws rules of such state.

          7.9 No Benefit to Others. The representations,  warranties,  covenants
     and agreements  contained in this Agreement are for the sole benefit of the
     parties hereto and, in the case of Article 4 hereof,  the other Indemnified
     Parties, and their heirs, executors, administrators, legal representatives,
     successors  and assigns,  and they shall not be construed as conferring any
     rights on any other persons.

          7.10 Headings,  Gender, "Person" and Certain Definitions.  All section
     headings contained in this Agreement are for convenience of reference only,
     do not form a part of this  Agreement  and shall not  affect in any way the
     meaning or interpretation of this Agreement.  Words used herein, regardless
     of the number and gender  specifically  used, shall be deemed and construed
     to include  any other  number,  singular or plural,  and any other  gender,
     masculine, feminine, or neuter, as the context requires. Any reference to a
     "person"   herein  shall   include  an   individual,   firm,   corporation,
     partnership,   trust,   governmental   authority   or  body,   association,
     unincorporated  organization  or any  other  entity.  Any  reference  to an
     "affiliate"  herein  means,  with  respect to any person,  any other person
     directly or indirectly controlling,  controlled by, or under common control
     with such other person. Unless specifically provided for to the contrary,

                                       54

<PAGE>






     "Knowledge of Sellers," "Sellers' knowledge" or any other similar knowledge
     qualification  in this  Agreement  means  to the  actual  knowledge,  after
     reasonable investigation,  of any of the following persons: George Mammola,
     President of AWT Air Company,  Inc.;  William  Hughes,  General  Manager of
     Flex-Kleen; Alain Brunais; Wayne Fritz; Augstine Bolella; Donald Schneider;
     Al Foote;  James Hojnacki;  Mike Maxwell;  Carrie Tepper;  John Mondak; and
     Maurice  Hamilton.  All  monetary  amounts  set forth  herein are in United
     States dollars unless expressly otherwise set forth.

          7.11  Schedules and Exhibits.  All Exhibits and Schedules  referred to
     herein are intended to be and hereby are  specifically  made a part of this
     Agreement.

          7.12 Severability. Any provision of this Agreement which is invalid or
     unenforceable  in any  jurisdiction  shall be  ineffective to the extent of
     such  invalidity  or  unenforceability  without  invalidating  or rendering
     unenforceable the remaining  provisions  hereof, and any such invalidity or
     unenforceability  in  any  jurisdiction  shall  not  invalidate  or  render
     unenforceable such provision in any other jurisdiction.

          7.13  Counterparts.  This  Agreement  may be executed in any number of
     counterparts and any party hereto may execute any such counterpart, each of
     which when executed and delivered shall be deemed to be an original and all
     of which  counterparts taken together shall constitute but one and the same
     instrument.   This  Agreement   shall  become  binding  when  one  or  more
     counterparts  taken  together shall have been executed and delivered by the
     parties. It shall not be necessary in making proof of this Agreement or any
     counterpart hereof to produce or account for any of the other counterparts.

          7.14  Waiver  of  Jury  Trial.  EACH  OF  THE  PARTIES  HERETO  HEREBY
     IRREVOCABLY  WAIVES  ANY AND  ALL  RIGHT  TO  TRIAL  BY  JURY IN ANY  LEGAL
     PROCEEDING  ARISING OUT OF OR RELATED TO THIS AGREEMENT OR THE TRANSACTIONS
     CONTEMPLATED HEREBY.

          7.15  Guarantee.  Shareholders  hereby  unconditionally  guarantee  to
     Purchasers and their  affiliates the full and timely  performance of all of
     the  obligations and agreements of Sellers.  The foregoing  guarantee shall
     include the  guarantee  of the payment of all  damages,  costs and expenses
     which might become  recoverable as a result of the nonperformance of any of
     the  obligations  or  agreements  so  guaranteed  or  as a  result  of  the
     nonperformance of this guarantee. Any guaranteed person may, at its option,
     proceed against Shareholders, jointly and severally, for the performance of
     any such  obligation  or  agreement,  or for  damages  for  default  in the
     performance  thereof,  without first proceeding  against any other party or
     against  any of its  properties.  Shareholders  further  agree  that  their
     guarantee shall be an irrevocable guarantee  and shall  continue in effect

                                       55

<PAGE>






     notwithstanding any extension or modification of any guaranteed obligation,
     any assumption of any such guaranteed obligation by any other party, or any
     other act or thing which might  otherwise  operate as a legal or  equitable
     discharge  of a  guarantor,  and  Shareholders  hereby  waive  all  special
     suretyship defenses and notice requirements.


                                       56

<PAGE>






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


                                                 FLEX-KLEEN CORPORATION


                                            By:  /s/ George C. Mammola
                                                 -------------------------
                                                 Name: George C. Mammola
                                                 Title: President


                                                 AWT AIR COMPANY, INC.


                                            By:  /s/ George C. Mammola
                                                 -------------------------
                                                 Name: George C. Mammola
                                                 Title: President


                                                 FLEX-KLEEN CANADA LIMITED


                                            By:  /s/ George C. Mammola
                                                 -------------------------      
                                                 Name: George C. Mammola
                                                 Title: President

                                                 AQUA ALLIANCE, INC.


                                            By:  /s/ Alain Brunais
                                                 -------------------------      
                                                 Name: Alain Brunais
                                                 Title: Chief Financial Officer


                                                 MET-PRO CORPORATION


                                            By:  /s/ William L. Kacin
                                                 -------------------------      
                                                 Name: William L. Kacin
                                                 Title: President


                                       57

<PAGE>





                                                 1321249 ONTARIO LIMITED


                                                 By:  /s/ William L. Kacin
                                                      -------------------------
                                                      Name: William L. Kacin
                                                      Title: President



WITNESSES:

/s/
- --------------------------

/s/
- --------------------------


                                       58

<PAGE>


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