1


                                                        Exhibit 10(a)

           AMENDMENT NO. 2 TO AGREEMENT AND PLAN OF REORGANIZATION


        This Amendment, dated as of July 27, 1995 (the "Amendment") to the
Agreement and Plan of Reorganization, dated December 5, 1995, as amended, (the
"Reorganization Agreement") by and among OHM Corporation, an Ohio corporation,
Rust Remedial Services, Inc., a Delaware corporation, Enclean Environmental
Services Group, Inc., a Delaware corporation, Rust Environmental Inc., a former
Delaware corporation that merged out of existence with and into OHM Remediation
Services Corp., an Ohio corporation and Rust International, Inc., a Delaware
corporation.

        For good and valuable consideration, the parties hereby agree that the
Reorganization Agreement shall be amended as follows:

        1.      Section 3.1(a) of the Reorganization Agreement is hereby
amended and restated as follows:

                (a) By the close of business on August 15, 1995, OHM shall
        prepare and deliver a statement of current assets and current
        liabilities of Environmental as of the last day of the month either
        preceding or following the Closing Date which is closest to the Closing
        Date (the "Closing Statement") which shall be prepared on a basis
        consistent with the Division Balance Sheet (each, as hereinafter
        defined).
        
        2.      Section 3.1(b) of the Reorganization Agreement is hereby
amended and restated as follows:

                (b)  If, within 45 days after the date such Closing Statement
        is delivered to Rust, Rust shall not have given written notice to OHM
        setting forth in detail any objection of Rust to such Closing
        Statement, then such Closing Statement shall constitute the "Division
        Closing Statement" and the current assets shown thereon less the
        current liabilities shown thereon shall constitute the "Division
        Closing Net Current Asssets."  In the event Rust, within such 45-day
        period, shall give written notice of any objection to such Closing
        Statement, OHM and Rust shall endeavor to reach agreement on all
        differences within the 30-day period following the giving of notice by
        Rust of its objections.  If the parties are unable to reach agreement
        within such 30-day period, the matter shall be submitted to a firm of
        independent certified public accountants as may be agreed to by OHM and
        Rust (the "Independent Accountants"), the decision of which shall be
        final and binding upon the OHM and Rust.  The Closing Statement agreed
        upon by OHM and Rust or as determined by the Independent Accountants
        pursuant to this Section 3.1 shall constitute the "Division Closing
        Statement" and the net current assets shown thereon shall constitute
        the "Division Closing Net Current Assets".
        
   2


        OHM and Rust shall bear equally the expenses of the Independent
        Accountants.

        3.      Except as amended herein, the Reorganization Agreement and the
Schedules thereto shall remain in full force and effect.

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


OHM CORPORATION                          RUST REMEDIAL SERVICES INC.

By:    /s/ Randall M. Walters            By:    /s/ Michael T. Brown
   -----------------------------               ----------------------------- 
Title:  Vice President                   Title:  Treasurer                

                                                                             
ENCLEAN ENVIRONMENTAL SERVICES           OHM REMEDIATION SERVICES CORP.
  
By:    /s/ Michael T. Brown              By:    /s/ Randall M. Walters    
   -----------------------------               ----------------------------- 
Title:  Treasurer                         Title:  Vice President           


RUST INTERNATIONAL INC.

By:   /s/ Michael T. Brown
   ------------------------------  
Title:  Vice President