Exhibit 10.18



May 23, 1997


Mr. Ron Logerwell
8245 Boon Blvd., Suite 700
Vienna, VA 22l82

Dear Mr. Logerwell:


This  consulting  agreement  ("Agreement")  revises,  restates  and replaces the
original  consulting  agreement between IDM Environmental  Corp. (the "Company")
and you dated April 25, 1996 ("Original  Agreement").  The Company is pleased to
present you with the revised  Agreement in recognition of your  contributions to
the Company and as an incentive to continue to serve the Company.

Inasmuch  as  you  have  developed   substantial   expertise  in   environmental
contracting  and have many  contacts  among  public  and  private  environmental
remediation  customers that IDM  Environmental  Corp. (the  "Company")  believes
would be useful to the Company,  subject to the further  provisions  hereof, the
Company will retain you and you will serve the Company as a consultant.

     1. Duties.  During the Term (as hereinafter  defined) you agree to consult,
in person and by  telephone,  with the  Company  and its  employees,  agents and
representatives  and other persons that the Company reasonably requests that you
meet with.

     2. Compensation; Expenses.
        ----------------------
 
          (a) Fee.  The  Company  will  compensate  you for the  services  to be
     rendered  by you  hereunder  with a  monthly  fee at the rate of  $2,500.00
     payable on the first business day of each month.
 
          (b) Stock Option.  In addition to your monthly fee, the Company hereby
     grants to you an option to purchase from the Company up to thirty  thousand
     (30,000)  shares (the  "Option  Shares") of the  Company's  $.00l par value
     Common  Stock at the  price  per share  set  forth  below  pursuant  to the
     Company's  l995 Stock  Option Plan and subject to the terms and  conditions
     thereof (the  "Option").  This grant is subject to the terms and conditions
     hereinafter stated.  Your options may be purchased,  subject to the vesting
     schedule set forth herein, at the following prices per share:

<PAGE>


                Option Shares                      Price Per Share
               --------------                     -----------------
                1 to 5,000                         $2.00
                5,001 to 10,000                    $2.50
                10,001 to 15,000                   $3.00
                15,001 to 20,000                   $3.50
                20,001 to 25,000                   $4.00
                25,001 to 30,000                   $4.50

          (i) Vesting Schedule.  Upon execution of this Agreement,  5,000 Option
     Shares shall vest and be immediately exercisable by you. The balance of the
     Option  Shares shall vest at the rate of l,000  Option  Shares for each one
     million  dollars in revenue  recognized  by the  Company  which is directly
     attributable to your efforts.

          (ii) Exercise  Period.  Except as otherwise  provided  below,  you may
     exercise your Option Shares to the extent vested from the date of the grant
     through the fifth anniversary  thereof.  The Option Shares may be exercised
     in part from time to time or in full but only to the extent vested.
 
          (iii)  Payment.  You shall pay for the Common  Stock  underlying  your
     Option  Shares  in full at the time you  exercise  and no  shares  shall be
     issued until such payment has been received.

          (iv)  Termination  of  Consulting  Relationship.  Except as  otherwise
     expressly provided, this Option may be exercised only while you are engaged
     by the  Company  as a  consultant  provided,  however,  (a) if the  Company
     terminates you with cause or you terminate your  engagement  without cause,
     your Option shall expire immediately, and (b) if the Company terminates you
     without cause or you terminate your engagement  with cause,  then you shall
     have the right for one year from the date of  termination  to exercise  the
     Option Shares to the extent  vested,  in whole or in part. If you die while
     engaged by the Company, your estate or any person who acquires the right to
     exercise this Option by bequest or  inheritance  or by reason of your death
     shall  have  the  right  within  one year  from  the date of your  death to
     exercise the Option Shares to the extent vested, in whole or in part.

          (v)  Non-Transferability.  The Option shall not be transferable  other
     than by last will and testament or by the laws of descent and distribution.
     During your lifetime, the Option shall be exercisable only by you.

          (vi) SEC  Requirements.  The  exercise of the Option,  the issuance of
     shares  pursuant  to such  exercise,  and the  subsequent  transfer of such
     shares shall be conditioned  upon compliance with the listing  requirements
     of any  securities  exchange  upon  which the stock of the  Company  may be
     listed,  the  requirements  of  the  Securities  Act  of  l933  and/or  the
     Securities  Exchange Act of l934, and the  requirements of applicable state
     laws relating to  authorization,  issuance or sale of  securities,  and the
     Company may take such measures as it deems  desirable to secure  compliance
     with the foregoing.

<PAGE>


          (vii) Change in Capital  Stock.  The total number of shares subject to
     this Option shall be appropriately adjusted for a change in the outstanding
     shares of  Common  Stock of the  Company  through  recapitalization,  stock
     split, stock dividend or a change in the corporate structure through merger
     or consolidation in which the Company is not the surviving corporation, any
     outstanding options hereunder shall terminate,  provided that you shall, in
     such  event,   have  the  right  immediately  prior  to  such  dissolution,
     liquidation,  or merger or  consolidation  in which the  Company is not the
     surviving  corporation,  to exercise  your  Option to the extent  vested in
     whole or in part.  Nothing herein contained shall prevent the assumption of
     an option or the  substitution  thereof  of a new  option by the  surviving
     corporation.  Such adjustments and the manner of application  thereof shall
     be  determined  by the  Board  of  Directors  of the  Company  in its  sole
     discretion.
 
          (viii)  Withholding  Tax.  The  Company may adopt and apply rules that
     will  ensure  that  the  Company  will be able to  comply  with  applicable
     provisions of any federal,  state or local law relating to the  withholding
     of tax,  including but not limited to the  withholding of tax on the amount
     includable in your income on the exercise of the Option.


          (ix) Right to Terminate  Employment;  Benefits under Other Plans.  The
     right of the Company to  terminate  or change your  engagement  at any time
     with or without  cause shall not be  restricted by the grant of the Option.
     You shall not be deemed to receive  compensation  or realize  earnings  for
     purposes of determining  benefits under any pension,  profit sharing,  life
     insurance,  salary  continuation or other employee benefit plan as a result
     of receiving or exercising the Option.
 
          (c) Expenses.  The Company will  reimburse  you for all  extraordinary
     travel expenses reasonably incurred in performing your duties hereunder, in
     all cases upon the presentation by you of an itemized account  satisfactory
     to  the  Company  in   substantiation   of  such   expenses  when  claiming
     reimbursement.

     3. Term.  You agree that your  engagement  as a  consultant  to the Company
began on March 25, l996 and  continues on and through the date hereof;  provided
that your engagement may, at any time upon three days' prior written notice,  be
terminated  by  you  or  by  the  Company   (collectively,   the  "Term").  Upon
termination, all of your obligations,  other than those contained in paragraph 4
of  this  Agreement,  and  all of the  obligations  of the  Company  under  this
Agreement  except with respect to fees earned through such date and expenses due
for reimbursement and as otherwise set forth herein shall terminate.

     4.  Secret or  Confidential  Information.  During the Term and for ten (l0)
years thereafter,  you will not directly or indirectly  divulge to anyone (other
than the Company's  directors and persons  designated by its Board of Directors)
or  use  for  your  personal  benefit,  or the  benefit  of  any  other  person,
confidential  or  proprietary  information  of the Company,  including,  without
limitation, any trade secrets, inventions,  discoveries,  improvements, devices,
practices,   processes,   methods  or  products,  whether  or  not  patented  or
patentable, as to which at any time during the Term you become aware except that
which (i) shall be  generally  known to the  public or  recognized  as  standard
practice,  (ii)  becomes  available  to you on a  non-confidential  basis from a
source  other than the  Company,  unless  disclosed  in breach of  agreement  or
applicable law, (iii) was already known to you on the date of this Agreement, or
(iv) must be disclosed,  as  determined by the Company on advice of counsel,  to
comply with applicable law.

<PAGE>


     5. Survival.  Notwithstanding  any termination of this  Agreement,  you, in
consideration  of your  consulting  hereunder  to the date of such  termination,
shall remain bound by the provisions of the foregoing paragraph 4.
 
     6.  Severability.  If any provision of this  Agreement  including,  without
limitation,  the  provisions of Paragraph 4, or the  application  thereof to any
person(s) or  circumstance(s)  shall be invalid or  unenforceable to any extent,
the remainder of this  Agreement and the  application of such provision to other
Person(s)  or  circumstance(s)  shall  not be  affected  thereby;  and each such
provisions shall be enforced to the greatest extent permitted by law.
 
     7.  Miscellaneous.  The  provisions  of this  Agreement  may be  amended or
modified by and only by a written instrument signed by the parties hereto.  This
Agreement  shall inure to the benefit of and be binding upon the  successors  of
the Company,  but shall not  otherwise be assignable by the Company or you. This
Agreement  shall be construed  and enforced in  accordance  with the laws of the
State of New Jersey.

     If you agree with the  foregoing,  please  sign the  enclosed  copy of this
letter and return it to the  Company,  whereupon  this  revised  Agreement  will
become  a  binding  agreement  between  you and  the  Company  and the  Original
Agreement shall immediately  terminate and shall no longer be legally binding or
have any force or effect.

                                                    Very truly yours,

The foregoing is agreed to as                       IDM ENVIRONMENTAL CORP.
of the day and year first above
written.
 
 /s/  Ron Logerwell                                  By: /s/  Joel Freedman
--------------------------------                       ------------------------
     Ron Logerwell                                          Joel Freedman
                                                            President