Document:

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Halifax Letter
June 7, 2002
Page 1

                                                                    EXHIBIT 10.4

                [TO BE PRINTED ON HALIFAX FUND, L.P. LETTERHEAD]

June 7, 2002

Mr. Bruce C. Rosetto
Executive Vice President and Secretary
U.S. Plastic Lumber Corp.
2300 W. Glades Rd., Suite 440W
Boca Raton, Florida 33431

                           HALIFAX CONSENT AND WAIVER

Dear Bruce:

                  Halifax Fund, L.P. and its affiliated entities (collectively,
"HALIFAX"), as holders of the Convertible Debenture Purchase Agreements dated as
of February 2, 2000 and June 15, 2001 between USPL and Halifax (the "PURCHASE
AGREEMENTS") and the related Convertible Debentures due February 2, 2005 (the
"February 2005 Debenture") and May 31, 2002 (the "May 2002 DEBENTURE"),
respectively, and together with the Purchase Agreements and all other related
documents, instruments and agreements, the "HALIFAX DOCUMENTS", hereby state
that they have no objection to the sale of all of the issued and outstanding
capital stock of Clean Earth, Inc., a Delaware corporation ("CLEAN EARTH") by
U.S. Plastic Lumber Corp., a Nevada corporation ("USPL") to CEI Holding
Corporation, a Delaware corporation and/or CEI Acquisition Corp., a Delaware
corporation, or such other nominee as sponsored by EOS Partners, L.P. (the
"CLEAN EARTH SALE TRANSACTION"). ). In particular, Halifax hereby waives any and
all defaults that may arise under, or relate to, the Halifax Documents as a
result of the Clean Earth Sale Transaction, including but not limited to, any
default pursuant to Section 19(g) of the February 2002 Debenture and Section 17
(g) of the May 2002 Debenture.

                  Subject to the execution of definitive documentation as
contemplated by the letter dated June 6, 2002 from USPL addressed to Scott
Grotjan of The Palladin Group, L.P., upon the consummation of the Clean Earth
Sale Transaction, Halifax will (i) release any and all of its liens upon, and
security interests in, all of the assets of Clean Earth, Inc. and its
subsidiaries (including but not limited to any liens or security interest
against the capital stock of Clean Earth and its subsidiaries), and (ii)
cooperate with and/or authorize USPL or Clean Earth to file any documents
necessary to terminate Halifax's liens and/or security interests of record as
herein indicated.

                  This letter agreement is intended to be a binding agreement
between the parties hereto and shall be governed by the laws of the State of New
York, without giving effect to the conflict or choice of law provisions or
rules.

                                            Very truly yours,

                                            HALIFAX FUND, L.P.

                                            By: /s/ ROBERT CHENDER
                                            -----------------------------------
                                            Name: Robert Chender
                                            Title: Managing Director<PAGE>
                                                                    EXHIBIT 10.5

                              TERMINATION AGREEMENT

         TERMINATION AGREEMENT (the "Agreement"), dated as of June 04, 2002, by
and between U.S. PLASTIC LUMBER CORP., a Nevada corporation, (the "Company"),
and FUSION CAPITAL FUND II, LLC, an Illinois limited liability company (the
"Buyer").

         WHEREAS, the Buyer and the Company mutually desire to terminate the
Common Stock Purchase Agreement dated as of May 16, 2001, by and between the
Company and the Buyer (the "Purchase Agreement") and the agreements entered into
in connection with the Purchase Agreement. All capitalized terms used in this
Agreement that are not defined in this Agreement shall have the meanings set
forth in the Purchase Agreement.

         NOW THEREFORE, the Company and the Buyer hereby agree as follows:

         1. TERMINATION OF THE PURCHASE AGREEMENT.

         The Purchase Agreement, any other Transaction Document or any other
agreement between the Buyer and the Company related to the Purchase Agreement
(other than this Agreement) are hereby terminated effective as of the date
hereof and any and all rights, duties and obligations arising thereunder or in
connection with the Purchase Agreement, and the Transaction Documents are now
and hereafter fully and finally terminated, provided, however, that the
representations and warranties of the Company contained in Sections 2 and 3 of
the Purchase Agreement, the indemnification provisions set forth in Section 8 of
the Purchase Agreement and the agreements and covenants set forth in Section 11
of the Purchase Agreement shall survive such termination and shall continue in
full force and effect (the "Surviving Obligations").

         2. MUTUAL GENERAL RELEASE.

         Except as may arise under or in connection with this Agreement or the
Surviving Obligations, the Company and the Buyer hereby release and forever
discharge each party hereto and its predecessors, successors and assigns,
employees, shareholders, partners, managing members, officers, directors,
agents, subsidiaries, divisions and affiliates from any and all claims, causes
of actions, suits, demands, debts, dues, accounts, bonds, covenants, contracts,
agreements, judgments whatsoever in law or in equity, whether known or unknown,
including, but not limited to, any claim arising out of or relating to the
transactions described in the Purchase Agreement and Transaction Documents which
any party hereto had, now has or which its heirs, executors, administrators,
successors or assigns, or any of them, hereafter can, shall or may have, against
any party hereto or such parties predecessors, successors and assigns,
employees, shareholders, partners, managing members, officers, directors,
agents, subsidiaries, divisions and affiliates, for or by reason of any cause,
matter or thing whatsoever, whether arising prior to, on or after the date

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hereof, provided, however, that this Agreement and the Surviving Obligations
shall continue in full force and effect as the legal, valid and binding
obligation of each party thereto enforceable against each such party in
accordance with its terms.

         3. MISCELLANEOUS.

         (a) GOVERNING LAW; JURISDICTION; JURY TRIAL. All questions concerning
the construction, validity, enforcement and interpretation of this Agreement
shall be governed by the internal laws of the State of Illinois, without giving
effect to any choice of law or conflict of law provision or rule (whether of the
State of Illinois or any other jurisdictions) that would cause the application
of the laws of any jurisdictions other than the State of Illinois. Each party
hereby irrevocably submits to the exclusive jurisdiction of the state and
federal courts sitting in the City of Chicago, for the adjudication of any
dispute hereunder or under the other Transaction Documents or in connection
herewith or therewith, or with any transaction contemplated hereby or discussed
herein, and hereby irrevocably waives, and agrees not to assert in any suit,
action or proceeding, any claim that it is not personally subject to the
jurisdiction of any such court, that such suit, action or proceeding is brought
in an inconvenient forum or that the venue of such suit, action or proceeding is
improper. Each party hereby irrevocably waives personal service of process and
consents to process being served in any such suit, action or proceeding by
mailing a copy thereof to such party at the address for such notices to it under
this Agreement and agrees that such service shall constitute good and sufficient
service of process and notice thereof. Nothing contained herein shall be deemed
to limit in any way any right to serve process in any manner permitted by law.
EACH PARTY HEREBY IRREVOCABLY WAIVES ANY RIGHT IT MAY HAVE, AND AGREES NOT TO
REQUEST, A JURY TRIAL FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN
CONNECTION HEREWITH OR ARISING OUT OF THIS AGREEMENT OR ANY TRANSACTION
CONTEMPLATED HEREBY.

         (b) COUNTERPARTS. This Agreement may be executed in two or more
identical counterparts, all of which shall be considered one and the same
agreement and shall become effective when counterparts have been signed by each
party and delivered to the other party; provided that a facsimile signature
shall be considered due execution and shall be binding upon the signatory
thereto with the same force and effect as if the signature were an original, not
a facsimile signature.

         (c) HEADINGS. The headings of this Agreement are for convenience of
reference and shall not form part of, or affect the interpretation of, this
Agreement.

         (d) SEVERABILITY. If any provision of this Agreement shall be invalid
or unenforceable in any jurisdiction, such invalidity or unenforceability shall
not affect the validity or enforceability of the remainder of this Agreement in
that jurisdiction or the validity or enforceability of any provision of this
Agreement in any other jurisdiction.

         (e) NOTICES. Any notices, consents, waivers or other communications
required or permitted to be given under the terms of this Agreement must be in
writing and will be deemed to have been delivered: (i) upon receipt, when
delivered personally; (ii) upon receipt, when sent by facsimile (provided

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confirmation of transmission is mechanically or electronically generated and
kept on file by the sending party); or (iii) one Trading Day after deposit with
a nationally recognized overnight delivery service, in each case properly
addressed to the party to receive the same. The addresses and facsimile numbers
for such communications shall be:

         If to the Company:
                  U.S. Plastic Lumber Corp.
                  2300 Glades Road, Suite 440W
                  Boca Raton, FL 33431
                  Telephone: 561-394-3511
                  Facsimile: 561-394-5335
                  Attention: Bruce  C. Rosetto

         With a copy to:
                  U.S. Plastic Lumber Corp.
                  2300 Glades Road, Suite 440W
                  Boca Raton, FL 33431
                  Telephone: 561-394-3511
                  Facsimile: 561-394-5335
                  Attention: John W. Poling

         If to the Buyer:
                  Fusion Capital Fund II, LLC
                  222 Merchandise Mart Plaza, Suite 9-112
                  Chicago, IL 60654
                  Telephone: 312-644-6644
                  Facsimile: 312-644-6244
                  Attention: Steven G. Martin

or at such other address and/or facsimile number and/or to the attention of such
other person as the recipient party has specified by written notice given to
each other party three (3) Trading Days prior to the effectiveness of such
change. Written confirmation of receipt (A) given by the recipient of such
notice, consent, waiver or other communication, (B) mechanically or
electronically generated by the sender's facsimile machine containing the time,
date, and recipient facsimile number or (C) provided by a nationally recognized
overnight delivery service, shall be rebuttable evidence of personal service,
receipt by facsimile or receipt from a nationally recognized overnight delivery
service in accordance with clause (i), (ii) or (iii) above, respectively.

         (f) SUCCESSORS AND ASSIGNS. This Agreement shall be binding upon and
inure to the benefit of the parties and their respective successors and assigns.
The Company shall not assign this Agreement or any rights or obligations
hereunder without the prior written consent of the Buyer, including by merger or
consolidation. The Buyer may not assign its rights or obligations under this
Agreement.

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         (g) NO THIRD PARTY BENEFICIARIES. This Agreement is intended for the
benefit of the parties hereto and their respective permitted successors and
assigns, and is not for the benefit of, nor may any provision hereof be enforced
by, any other person.

         (h) FURTHER ASSURANCES. Each party shall do and perform, or cause to be
done and performed, all such further acts and things, and shall execute and
deliver all such other agreements, certificates, instruments and documents, as
the other party may reasonably request in order to carry out the intent and
accomplish the purposes of this Agreement.

         (i) NO STRICT CONSTRUCTION. The language used in this Agreement is the
language chosen by the parties to express their mutual intent, and no rules of
strict construction will be applied against any party.

         (j) CHANGES TO THE TERMS OF THIS AGREEMENT. This Agreement and any
provision hereof may only be amended by an instrument in writing signed by the
Company and the Buyer. The term "Agreement" and all reference thereto, as used
throughout this instrument, shall mean this instrument as originally executed,
or if later amended or supplemented, then as so amended or supplemented.

         (k) FAILURE OR INDULGENCE NOT WAIVER. No failure or delay in the
exercise of any power, right or privilege hereunder shall operate as a waiver
thereof, nor shall any single or partial exercise of any such power, right or
privilege preclude other or further exercise thereof or of any other right,
power or privilege.

                                     * * * *

         IN WITNESS WHEREOF, the Buyer and the Company have caused this
Termination Agreement to be duly executed as of the date first written above.

                            THE COMPANY:

                            U.S. PLASTIC LUMBER CORP.

                            By: /s/  BRUCE C. ROSETTO
                               -------------------------------------------
                            Name:  Bruce C. Rosetto
                            Title: Vice President and General Counsel

                            BUYER:

                            FUSION CAPITAL FUND II, LLC
                            BY: FUSION CAPITAL PARTNERS, LLC
                            BY: SGM HOLDINGS CORP.

                            By: /s/ STEVEN G. MARTIN
                               -------------------------------------------
                            Name:  Steven G. Martin
                            Title: President

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