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                                                                   EXHIBIT 10.22
    

                                    AMENDMENT
                                       TO
                      AGREEMENT AND PLAN OF REORGANIZATION




         THE UNDERSIGNED, being all of the parties to that certain AGREEMENT AND
PLAN OF REORGANIZATION (hereinafter referred to as the "Agreement") made and
entered into as of the 31st day of July, 1997, by and among LYONNAISE AMERICAN
HOLDING, INC., a Delaware corporation, GESTRA CORPORATION N.V., a company
organized in the Netherlands Antilles, RUSH CREEK LLC, a Wisconsin limited
liability company, AQUA-CHEM, INC., a Delaware corporation, A-C ACQUISITION
CORP., a Delaware corporation, and JEFFREY A. MILLER hereby agree as follows:

         1. Capitalized terms used herein and not defined shall have the meaning
set forth in the Agreement.

         2. Section 9.1 of the Agreement is amended to read as follows in its
entirety:


   
                  9.1 UPON REDEMPTION OF SERIES A AND SERIES B PREFERRED STOCK.
         The General Indemnity, [THIS PROVISION HAS BEEN OMITTED AND FILED 
         SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION AND IS SUBJECT 
         TO A REQUEST FOR CONFIDENTIAL TREATMENT PURSUANT TO 17 CFR SECTION 
         240.24b2] obligations of each Seller as the same shall have 
         accrued from the date of Closing to the date of complete redemption 
         of the Series A and Series B Preferred Stock shall be satisfied from 
         such Seller's shares of the Series A and Series B Preferred Stock and 
         required cash payments in accordance with the priorities and solely 
         and exclusively in the manner hereinafter set forth.

                           (a) First, the [THIS PROVISION HAS BEEN OMITTED AND
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION 
                  AND IS SUBJECT TO A REQUEST FOR CONFIDENTIAL TREATMENT
                  PURSUANT TO 17 CFR SECTION 240.24b2] obligation (as the
                  same shall exist at the time of redemption of the Series B
                  Preferred Stock) shall be satisfied in full and solely and
                  exclusively (i) first, by reducing the redemption price of the
                  Series B Preferred Stock and (ii) second, by reducing the
                  dividends accrued on the Series B Preferred Stock.

                           (b) Second, the [THIS PROVISION HAS BEEN OMITTED AND 
                  FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION 
                  AND IS SUBJECT TO A REQUEST FOR CONFIDENTIAL TREATMENT
                  PURSUANT TO 17 CFR SECTION 240.24b2] obligation (as the
                  same shall exist at the time(s) of any redemption(s) of all or
                  any part of the Series A and Series B Preferred Stock) shall
                  be satisfied in full and solely and exclusively (i) first, by
                  reducing any remaining redemption price of the Series B
                  Preferred Stock, (ii) second, by reducing any remaining
                  dividends accrued on the Series B Preferred Stock, (iii)
                  third, by reducing the dividends accrued on the Series A Stock
                  and (iv) fourth, by reducing the redemption price of the
                  Series A Preferred Stock.
    

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                                                                 EXHIBIT 10.22
    


                           (c) Third, the General Indemnity obligation (as the
                  same shall exist at the time of any redemption(s) of all or
                  any part of the Series A and Series B Preferred Stock) shall
                  be satisfied in full and solely and exclusively (i) first, by
                  reducing any remaining redemption price of the Series B
                  Preferred Stock, (ii) second, by reducing any remaining
                  dividends accrued on the Series B Preferred Stock, (iii)
                  third, by reducing the dividends accrued on the Series A Stock
                  (iv) fourth, by reducing the redemption price of the Series A
                  Preferred Stock and (v) fifth, by cash payment from the
                  Seller.

         3. Section 9.2 of the Agreement is amended to read as follows in its
entirety

   
                  9.2 SUBSEQUENT TO THE COMPLETE REDEMPTION OF ALL ISSUED AND
         OUTSTANDING SERIES A AND SERIES B PREFERRED STOCK. Subject in all
         respects to the limitations on indemnification set forth in Sections 6,
         7 and 8 of this Agreement, the General Indemnity, [THIS PROVISION HAS
         BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE 
         COMMISSION AND IS SUBJECT TO A REQUEST FOR CONFIDENTIAL TREATMENT
         PURSUANT TO 17 CFR SECTION 240.24b2] obligations of each Seller as 
         the same shall accrue from and after the date of the complete 
         redemption of all of the issued and outstanding shares of Series A and 
         Series B Preferred Stock shall be satisfied in accordance with the 
         priorities and solely and exclusively in the manner hereinafter set 
         forth.

                           (a) First, any unfulfilled [THIS PROVISION HAS BEEN 
                  OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE 
                  COMMISSION AND IS SUBJECT TO A REQUEST FOR CONFIDENTIAL 
                  TREATMENT PURSUANT TO 17 CFR SECTION 240.24b2] obligation 
                  shall be satisfied by cash payment from the Seller to the 
                  Purchaser Group, with such payment not to exceed an amount 
                  equal to (i) the total cash proceeds in payment of the
                  redemption price and accrued dividends actually received by
                  the Seller upon redemption of its Series B Preferred Stock,
                  plus (ii) the amount of any General Indemnity obligation of
                  the Seller that was satisfied at the time of redemption by
                  offset against the redemption price and/or accrued dividends
                  paid with respect to the Seller's Series B Preferred Stock,
                  plus (iii) the amount of any [THIS PROVISION HAS BEEN OMITTED 
                  AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE 
                  COMMISSION AND IS SUBJECT TO A REQUEST FOR CONFIDENTIAL 
                  TREATMENT PURSUANT TO 17 CFR SECTION 240.24b2] obligation of
                  the Seller that was satisfied at the time of redemption by
                  offset against the redemption price and/or accrued dividends
                  paid with respect to the Seller's Series B Preferred Stock,
                  minus (iv) any previous payments made by the Seller to the
                  Purchaser Group subsequent to the date of such redemption
                  pursuant to this paragraph (a).


                           (b) Second, any unfulfilled [THIS PROVISION HAS BEEN 
                  OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE 
                  COMMISSION AND IS SUBJECT TO A REQUEST FOR CONFIDENTIAL 
                  TREATMENT PURSUANT TO 17 CFR SECTION 240.24b2] obligation 
                  shall be satisfied by cash payment from the Seller to the 
                  Purchaser Group, with such payment not to exceed an amount 
                  equal to (i) the cash proceeds in payments of the redemption 
                  price and accrued dividends actually received by the Seller 
                  with respects to theSeries A and Series B Preferred Stock 
                  owned by the Seller, plus (ii) the amount of any General 
                  Indemnity obligation of the Seller that was satisfied at any 
                  times by offset against the redemption price
    

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                                                                EXHIBIT 10.22
    


                  and/or accrued dividends paid with respect to the Seller's
                  Series A or Series B Preferred Stock, minus (iii) the sum of
                  (A) any previous payments made by the Seller to the Purchaser
                  Group subsequent to the date of such redemption pursuant to
                  paragraph (a) immediately above or this paragraph (b), plus
                  (B) any current payment to be made by the Seller pursuant to
                  paragraph (a) immediately above.

                           (c) Third, any unfulfilled General Indemnity
                  obligation shall be satisfied by cash payment from the Seller
                  to the Purchaser Group, with such payment not to exceed an
                  amount equal to Five Million Dollars ($5,000,000) minus the
                  sum of (i) the amount of any General Indemnity obligation of
                  the Seller that was satisfied by offset against the redemption
                  price and/or accrued dividends paid with respect to the
                  Seller's Series A or Series B Preferred Stock, and minus the
                  sum of (ii) any previous payments made by the Seller to the
                  Purchaser Group subsequent to the date of such redemption
                  pursuant to this paragraph (c).

   
                  Notwithstanding anything to the contrary in this Section 9.2,
                  the total indemnity to the Purchaser Group with respect to    
                  [THIS PROVISION HAS BEEN OMITTED AND FILED SEPARATELY WITH
                  THE SECURITIES AND EXCHANGE COMMISSION AND IS SUBJECT TO A
                  REQUEST FOR CONFIDENTIAL TREATMENT PURSUANT TO 17 CFR SECTION
                  240.24b2] and interest thereon shall not exceed the lesser of
                  (i) the redemption price plus accrued dividends for the
                  Series A and Series B Preferred Stock and (ii) $10,000,000.
    

         4. There shall be substituted for Exhibit B to the Agreement the terms
of the Series A and Series B Preferred Stock as set forth in the Certificate of
Amendment attached hereto.

         5. Except to the extent expressly set forth herein, all provisions of
the Agreement shall continue in full force and effect.

         6. This Amendment to Agreement and Plan of Reorganization may be
executed in counterparts, which together shall constitute one and the same
instrument.


         IN WITNESS WHEREOF, the undersigned have executed this Amendment to
Agreement and Plan of Reorganization as of the 22nd day of June, 1998.

Lyonnaise American Holding, Inc.

By:        /s/ Joseph V. Boyle
   --------------------------------------  
       Vice President-Finance

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                                                                  EXHIBIT 10.22
    



Gestra Corporation, N.V.

By:     /s/ Miraj Ubdin
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Rush Creek LLC

By:   /s/ JA Miller
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Aqua-Chem, Inc.

By:    /s/ JA Miller
   --------------------------- 

A-C Acquisition Corp.

By:   /s/ JA Miller
   --------------------------- 


/s/ JA Miller
- --------------------------- 
Jeffrey A. Miller, Individually


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