Document:

EXHIBIT 10.70
                                                                   -------------

                           S.BREWER ENTERPRISES, INC.

                        2121 Jamieson Avenue, Suite 1406
                              Alexandria, VA 22314
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                                 (703)-567-1284

April 9, 2001

James M. DeAngelis
Commodore Applied Technologies
Chief Financial Officer
150 East 58th Street
Suite 3238
New York, New York 10155

Dear Jim,

Re:      Partial Note Conversion

Per the recent agreement deferring repayment of my loan of $500,000 to Commodore
from March 15, 2001 until December 31, 2001, please convert one-half of the
principal two-hundred thousand ($250,000) to CXI stock at the five-day average
close market price at March 15, 2001 close.

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   Date                                       Closing Price CXI Common
--------------------------------------------------------------------------------
April 06, 2001                                          $0.23
--------------------------------------------------------------------------------
April 05, 2001                                          $0.24
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April 04, 2001                                          $0.23
--------------------------------------------------------------------------------
April 03, 2001                                          $0.24
--------------------------------------------------------------------------------
April 02, 2001                                          $0.26
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
5-Day Average                                           $0.24
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$250,000 x 1/$0.24 = 1,041,666.7

This will amount to 1,041,667 shares. Please register these shares in the S-3
filing under preparation.

/s/ SHELBY T. BREWER
--------------------

S. BREWER ENTERPRISES, INC.
Shelby T. Brewer
PresidentEXHIBIT 10.71
                                                                   -------------

                           MEMORANDUM OF UNDERSTANDING
                                FOR AMENDMENT OF
                       $500,000 CXI BRIDGE LOAN DOCUMENTS

         1. Transaction: (i) Securities Purchase Agreement by and among
Commodore Environmental Services, Inc., a Delaware corporation ("COES")
Commodore Applied Technologies, Inc., a Delaware corporation ("CXI"), and
Mathers Associates, Klass Partners, Ltd., Jon Paul Hannesson and Stephen A.
Weiss, Esq. (except for Klass Partners, Ltd., individually an "Investor" and
collectively, the "Investors"), (ii) corresponding 12% Senior Secured Promissory
Notes due February 12, 2001 (the "Notes") in the aggregate principal amount of
up to $500,000 issued to the Investors in the proportion shown on Schedule A
annexed hereto, (iii) the Security Agreement (iv) the Registration Rights
Agreement, (v) the "DRM Undertaking", and all other documents executed and
delivered incident thereto, all dated as of November 13, 2000 (collectively the
"Bridge Loan Documents"). Klass Partners, Ltd. is not a party hereto.

         2. Amendments: Notwithstanding anything to the contrary in the Bridge
Loan Documents, the Investors, CXI and COES hereby agree to amend the Bridge
Loan Documents as follows:

                  (a). The Maturity Date (as defined in the Notes) of all Notes
                  will be extended so that 50% of all of the unpaid principal
                  and accrued interest on the Notes shall be payable on or
                  before on June 30, 2001 and the balance, or 50% of all unpaid
                  principal and accrued interest on the Notes, shall be due and
                  payable on or before July 31, 2001. The Notes shall be subject
                  to mandatory prepayment as set forth in 2(b) below.

                  (b). The Notes will be subject to earlier mandatory prepayment
                  or whole or in part, as the case may be, out of all net
                  proceeds in excess of $1.0 million which CXI or any subsidiary
                  of CXI shall receive from any third party in connection with
                  any on or more debt and/or equity cash financings (exclusive
                  of any funds distributed to CXI from its Dispute Resolution
                  Management, Inc. ("DRM" subsidiary). Any such mandatory
                  prepayments shall be applied first to accrued and unpaid
                  interest and net to principal in the order of first maturing
                  indebtedness. CXI shall provide the Investors (or its
                  representative, Greenberg Traurig, LLP) with true copies of
                  all letters of intent or related written proposals acceptable
                  to CXI which are received by CXI in connection with any such
                  external financings, not later than 10 days from receipt of
                  same; failure to so provide the Investors with such copies to
                  represent an event of default under the Notes.

                  (c) An "event of default" under the Notes (as restated by the
                  terms of this Memorandum of Understanding ("MOU")) shall

                                                                               1
<PAGE>

                  consist of: (i) CXI's failure to pay, when due, any
                  installment of principal and accrued interest under the
                  restated Notes or any other Notes due Klass Partners, Ltd.;
                  (ii) CXI's failure to register under the Securities Act of
                  1933, as amended, for the benefit of the Investors all shares
                  of CXI common stock and shares issuable under the CXI warrants
                  described herein, pursuant to an effective registration
                  statement on Form S-3 or Form S-1 by not later than May 31,
                  2001; (iii) the occurrence of an "Event of Default" by CXI
                  under the August 30, 2000 Amended and Restated Stock Purchase
                  Agreement among CXI, DRM, William J. Russell and Tamie P.
                  Speciale (the "DRM Principals") and the related exercise by
                  the DRM Principals of any of their rights and remedies to
                  foreclose upon 81% of the shares of capital stock of DRM under
                  a pledge agreement with CXI dated as of August 30, 2000; or
                  (iv) the voluntary or involuntary filing of any proceedings
                  against CXI under Chapter 11 of the Federal Bankruptcy Act or
                  similar state statutes.

                  (d) If and for so long as no event of default under the Notes
                  shall occur, the Investors shall irrevocably and
                  unconditionally waive their rights to all cash dividends,
                  other distributions or loans from DRM to CXI (the "DRM
                  Distributions") from November 12, 2000 through and including
                  July 31, 2001. From and after the earlier to occur of an event
                  of default the Notes or July 31, 2001, all funding from DRM to
                  CXI, if any, will first be paid to the Investors or their
                  successors (to the extent the Notes are still unpaid) as per
                  the terms of the existing DRM Undertaking letter.

                  (e). Contemporaneously herewith, CXI shall issue to the
                  Investors, pro rata, warrants for an additional 1.0 million
                  shares of CXI common stock in the form as that attached
                  hereto, each such warrant to have an exercise price equal to
                  the April 5, 2001 closing price for CXI's common stock (i.e.,
                  $0.22 per share). The warrants will contain cashless exercise
                  features and the shares of CXI common stock issuable upon
                  exercise of the warrants will be included in S-3 registration
                  statement that CXI is about to file with the SEC. In all other
                  respects, the warrants shall be subject to the same
                  registration rights as are contained in the Registration
                  Rights Agreement.

                  (f). CXI will file an S-3 registration statement with the SEC
                  within ten days after the filing of its Form 10-K for the year
                  ended December 31, 2001, and shall cause such registration
                  statement to be declared effective by the SEC by not later
                  than May 31, 2001.
                  .
                  (g). The Investors shall subordinate their security agreement
                  in their Collateral (as defined in the Security Agreement) in
                  favor of any lender to the extent of the first $1.0 million of
                  net proceeds (after selling commissions but before other
                  customary closing costs) received by CXI in connection with
                  any indebtedness owed by CXI to such third party lender;

                                                                               2
<PAGE>

                  provided, that such third party lender shall not be any
                  affiliate of CXI or its DRM subsidiary.

         3. Holders Representations. The Investors will, and hereby do,
represent that: (i) they are and since November 13, 2000, have been, the holders
of the Notes, (ii) they have full power and authority to agree to the terms
herein, and to make execute and deliver this Memorandum of Understanding and
(iii) if subsequent definitive agreements are necessary to implement this
Memorandum of Understanding, at the time thereof, they will have full power and
authority to agree to the terms herein, and to make execute and deliver such
definitive agreements.

         4. Representations by Corporation Parties. Each corporation party
separately represents to the Investors and to each other corporation party that
(i) Klass Partners, Ltd. has agreed to extend the maturity date of its Note
until May 1, 2001 pending a negotiation of a further extension of such maturity
date with Klass Partners, Ltd., (ii) it has full power and authority to agree to
the terms herein, and to make execute and deliver this Memorandum of
Understanding (ii) this Memorandum of Understanding has been duly approved and
authorized by the board of directors of each of CXI, Commodore Environmental
Services, Inc. and DRM; and (iii) if subsequent definitive agreements are
necessary to implement this Memorandum of Understanding, at the time thereof, it
will have full power and authority to agree to the terms herein, and to make
execute and deliver such definitive agreements.

         5. No default. Each investor hereby acknowledges and agrees that when
each party to this Memorandum of Understanding has executed and delivered this
Memorandum Of Understanding to each other party and when each of the conditions
precedent set forth below have been met, the Notes and all other Bridge Loan
Documents shall be deemed to be in compliance as of the Effective Date hereof.

         6. Definitive Agreements. Any party hereto may request the preparation
of and execution and delivery by each party hereto of definitive agreements
which definitive agreements shall incorporate the terms hereof. In the absence
of the making, preparation and delivery of these agreements, this Memorandum of
Understanding is and shall be the definitive agreement of the parties with
respect the amendment of the Bridge Loan Documents.

         7. Conditions Precedent. It shall be a condition precedent of the
effectiveness to this Memorandum of Understanding that on or before 1:00 P.M. on
Monday, April 16, 2001 each party hereto shall execute and deliver by facsimile
transmission a copy of this Memorandum of Understanding to each other party
hereto. This MOU may be executed in counterparts, each of which shall constitute
an original.

         8. Incorporation by reference. All of the representations and
warranties made by each of the parties to the Security Purchase Agreement are
incorporated herein by reference and are hereby deemed to be made to each other
party as fully as if set forth at length herein. Except as otherwise set forth
herein, the Bridge Loan Documents shall remain in full force and effect as of

                                                                               3
<PAGE>

their original effective date according to the terms contained therein and
binding upon the parties thereto and hereto.

         9. Counterpart, Delivery and Fax Signatures. This Agreement may be
executed in any number of counterparts, each of which shall be deemed an
original, but all of which taken together shall constitute one and the same
instrument. The direct or indirect delivery by hand delivery, mail, courier,
facsimile or otherwise, by any party hereto to any other party hereto bearing
the facsimile signature of such party shall be deemed to be execution and
delivery of an original counterpart version of this Memorandum of Understanding
and shall be deemed to be effective and binding upon such person.

         IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Memorandum of Understanding this 16th day of April 2001 and made effective as of
the 5th day of April 2001 (the "Effective Date").

                                    COMMODORE APPLIED TECHNOLOGIES, INC.

                                    By:     /s/ SHELBY T. BREWER
                                       -----------------------------------------
                                    Name:  Shelby T. Brewer
                                    Title:    President

                                    COMMODORE ENVIRONMENTAL SERVICES, INC.

                                    By:    /s/ JERRY KARLIK
                                       -----------------------------------------
                                    Name:  Jerry Karlik
                                    Title:

                                    DISPUTE RESOLUTION MANAGEMENT, INC.

                                    By:   /s/ WILLIAM J. RUSSELL
                                       -----------------------------------------
                                    Name:  William J. Russell
                                    Title:    President

                                    INVESTORS:

                                    MATHERS ASSOCIATES

                                    /s/ NORBERT J. ZEELANDER
                                    --------------------------------------------
                                    Norbert J. Zeelander, General Partner

                                                                               4
<PAGE>

                                    /s/ JON PAUL HANNESSON
                                    --------------------------------------------
                                    Jon Paul Hannesson

                                    /s/ STEPHEN A. WEISS
                                    -------------------------------------------
                                    Stephen A. Weiss

                                                                               5
<PAGE>

                                   Schedule A

                                   INVESTORS
                                   ---------
<TABLE>
<CAPTION>

    -------------------------------------------- -------------------------------- -----------------------------------
                                                                                    Number of New Warrants for CXI
                 Name and Address:                 Principal Amount Invested:               Common Stock:

    -------------------------------------------- -------------------------------- -----------------------------------
    <S>                                                    <C>                                 <C>
    Mathers Associates
    230 Mathers Road                                       $150,000                            300,000
    Ambler, PA 19002
    -------------------------------------------- -------------------------------- -----------------------------------
    Jon Paul Hannesson
    150 East 58th Street                                     75,000                            150,000
    Suite 3410
    New York, New York 10155
    -------------------------------------------- -------------------------------- -----------------------------------
    Stephen A. Weiss
    200 Park Avenue, 14th Floor                              25,000                             50,000
    New York, NY 10166
    -------------------------------------------- -------------------------------- -----------------------------------

    -------------------------------------------- -------------------------------- -----------------------------------
    Total . . . .                                          $250,000                            500,000
    -------------------------------------------- -------------------------------- -----------------------------------

</TABLE>

                                                                               6
<PAGE>

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