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                                                                   EXHIBIT 10.24

                                    GUARANTY

         THIS GUARANTY is made as of March 5, 2001, by DONALD F. MOOREHEAD, a
resident of the State of Texas ("Guarantor"), in favor of the Lender, as such
term is defined in the Credit Agreement described below.

RECITALS:

         1. EarthCare Resource Management of South Florida, Inc., a Florida
corporation, and EarthCare Acquisition Sub, Inc., an Illinois corporation
("Borrower"), has executed in favor of Lender the promissory notes of even date
herewith, payable to the order of Lender in the aggregate principal amount of
$2,500,000 (such promissory notes, as from time to time amended, and all
promissory notes given in substitution, renewal or extension therefor or
thereof, in whole or in part, being herein collectively called the "Note").

         2. The Note was executed pursuant to a Loan Letter Agreement of even
date herewith, (herein, as from time to time amended, supplemented or restated,
called the "Credit Agreement"), by and between Borrower, Lender, pursuant to
which Lender has agreed to advance funds to Borrower under the Note.

         3. It is a condition precedent to Lender's obligation to advance funds
pursuant to the Credit Agreement that Guarantor shall execute and deliver to
Lender a satisfactory guaranty of Borrower's obligations under the Note and the
Credit Agreement.

         4. Guarantor is a principal stockholder and creditor of EarthCare
Company, a Delaware corporation and the ultimate parent of Borrower.

         5. Guarantor will benefit directly or indirectly from the advances
under the Note to Borrower.

         NOW, THEREFORE, in consideration of the premises, of the benefits which
will inure to Guarantor from Lender's advances of funds to Borrower under the
Credit Agreement, and of Ten Dollars and other good and valuable consideration,
the receipt and sufficiency of all of which are hereby acknowledged, and in
order to induce Lender to advance funds under the Credit Agreement, Guarantor
hereby agrees with Lender as follows:

AGREEMENTS:

         Section 1. Definitions. Reference is hereby made to the Credit
Agreement for all purposes. All terms used in this Guaranty which are defined in
the Credit Agreement and not otherwise defined herein shall have the same
meanings when used herein. All references herein to any Obligation Document,
Loan Document, or other document or instrument refer to the same as from time to
time amended, supplemented or restated. As used herein the following terms shall
have the following meanings:

         "Lender" means all Persons who at any time are a "Lender" under the
Credit Agreement.


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         "Obligations" means collectively all of the indebtedness, obligations,
and undertakings, which are guaranteed by Guarantor and described in subsection
(a) and (b) of Section 2.

         "Obligation Documents" means this Guaranty, the Note, the Credit
Agreement, the Loan Documents, all other documents and instruments under, by
reason of which, or pursuant to which any or all of the Obligations are
evidenced, governed, secured, or otherwise dealt with, and all other documents,
instruments, agreements, certificates, legal opinions and other writings
heretofore or hereafter delivered in connection herewith or therewith.

         "Obligors" means Borrower, Guarantor and any other endorsers,
guarantors or obligors, primary or secondary, of any or all of the Obligations.

         "Security" means any rights, properties, or interests of Lender, under
the Obligation Documents or otherwise, which provide recourse or other benefits
to Lender in connection with the Obligations or the non-payment or
non-performance thereof, including collateral (whether real or personal,
tangible or intangible) in which Lender have rights under or pursuant to any
Obligation Documents, guaranties of the payment or performance of any
Obligation, bonds, surety agreements, keep-well agreements, letters of credit,
rights of subrogation, rights of offset, and rights pursuant to which other
claims are subordinated to the Obligations.

         Section 2. Guaranty.

         (a) Guarantor hereby irrevocably, absolutely, and unconditionally
guarantees to Lender the prompt, complete, and full payment when due, and no
matter how the same shall become due, of:

                  (i) the Note, including all principal, all interest thereon
         and all other sums payable thereunder; and

                  (ii) All other sums payable under the other Obligation
         Documents, whether for principal, interest, fees or otherwise; and

                  (iii) Any and all other indebtedness or liabilities which
         Borrower may at any time owe to Lender, whether incurred heretofore or
         hereafter or concurrently herewith, voluntarily or involuntarily,
         whether owed alone or with others, whether fixed, contingent, absolute,
         inchoate, liquidated or unliquidated, whether such indebtedness or
         liability arises by notes, discounts, overdrafts, open account
         indebtedness or in any other manner whatsoever, and including interest,
         attorneys' fees and collection costs as may be provided by law or in
         any instrument or agreement evidencing any such indebtedness or
         liability.

Without limiting the generality of the foregoing, Guarantor's liability
hereunder shall extend to and include all post-petition interest, expenses, and
other duties and liabilities of Borrower described above in this subsection (a),
or below in the following subsection (b), which would be owed by Borrower but
for the fact that they are unenforceable or not allowable due to the existence
of a bankruptcy, reorganization, or similar proceeding involving Borrower.

         (b) Guarantor hereby irrevocably, absolutely, and unconditionally
guarantees to Lender the prompt, complete and full performance, when due, and no
matter how the same shall become due,


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of all obligations and undertakings of Borrower to Lender under, by reason of,
or pursuant to any of the Obligation Documents.

         (c) If Borrower shall for any reason fail to pay any Obligation, as and
when such Obligation shall become due and payable, whether at its stated
maturity, as a result of the exercise of any power to accelerate, or otherwise,
Guarantor will, upon demand by Lender, pay such Obligation in full to Lender. If
Borrower shall for any reason fail to perform promptly any Obligation, Guarantor
will, upon demand by Lender, cause such Obligation to be performed or, if
specified by Lender, provide sufficient funds, in such amount and manner as
Lender shall in good faith determine, for the prompt, full and faithful
performance of such Obligation by Lender or such other Person as Lender shall
designate.

         (d) If either Borrower or Guarantor fails to pay or perform any
Obligation as described in the immediately preceding subsections (a), (b), or
(c) Guarantor will incur the additional obligation to pay to Lender, and
Guarantor will forthwith upon demand by Lender pay to Lender, the amount of any
and all expenses, including fees and disbursements of Lender's counsel and of
any experts or agents retained by Lender, which Lender may incur as a result of
such failure.

         (e) As between Guarantor and Lender, this Guaranty shall be considered
a primary and liquidated liability of Guarantor.

         Section 3. Unconditional Guaranty.

         (a) No action that Lender may take or omit to take in connection with
any of the Obligation Documents, any of the Obligations (or any other
indebtedness owing by Borrower to Lender), or any Security, and no course of
dealing of Lender with any Obligor or any other Person, shall release or
diminish Guarantor's obligations, liabilities, agreements or duties hereunder,
affect this Guaranty in any way, or afford Guarantor any recourse against
Lender, regardless of whether any such action or inaction may increase any risks
to or liabilities of Lender or any Obligor or increase any risk to or diminish
any safeguard of any Security. Without limiting the foregoing, Guarantor hereby
expressly agrees that Lender may, from time to time, without notice to or the
consent of Guarantor, do any or all of the following:

                  (i) Amend, change or modify, in whole or in part, any one or
         more of the Obligation Documents and give or refuse to give any waivers
         or other indulgences with respect thereto.

                  (ii) Neglect, delay, fail, or refuse to take or prosecute any
         action for the collection or enforcement of any of the Obligations, to
         foreclose or take or prosecute any action in connection with any
         Security or Obligation Document, to bring suit against any Obligor or
         any other Person, or to take any other action concerning the
         Obligations or the Obligation Documents.

                  (iii) Accelerate, change, rearrange, extend, or renew the
         time, rate, terms, or manner for payment or performance of any one or
         more of the Obligations (whether for principal, interest, fees,
         expenses, indemnifications, affirmative or negative covenants, or
         otherwise).



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                  (iv) Compromise or settle any unpaid or unperformed Obligation
         or any other obligation or amount due or owing, or claimed to be due or
         owing, under any one or more of the Obligation Documents.

                  (v) Take, exchange, amend, eliminate, surrender, release, or
         subordinate any or all Security for any or all of the Obligations,
         accept additional or substituted Security therefor, and perfect or fail
         to perfect Lender's rights in any or all Security.

                  (vi) Discharge, release, substitute, or add Obligors.

                  (vii) Apply all monies received from Obligors or others, or
         from any Security for any of the Obligations, as Lender may determine
         to be in their best interest, without in any way being required to
         marshal Security or assets or to apply all or any part of such monies
         upon any particular Obligations.

         (b) No action or inaction of any Obligor or any other Person, and no
change of law or circumstances, shall release or diminish Guarantor's
obligations, liabilities, agreements, or duties hereunder, affect this Guaranty
in any way, or afford Guarantor any recourse against Lender. Without limiting
the foregoing, the obligations, liabilities, agreements, and duties of Guarantor
under this Guaranty shall not be released, diminished, impaired, reduced, or
affected by the occurrence of any or all of the following from time to time,
even if occurring without notice to or without the consent of Guarantor:

                  (i) Any voluntary or involuntary liquidation, dissolution,
         sale of all or substantially all assets, marshaling of assets or
         liabilities, receivership, conservatorship, assignment for the benefit
         of creditors, insolvency, bankruptcy, reorganization, arrangement, or
         composition of any Obligor or any other proceedings involving any
         Obligor or any of the assets of any Obligor under laws for the
         protection of debtors, or any discharge, impairment, modification,
         release, or limitation of the liability of, or stay of actions or lien
         enforcement proceedings against, any Obligor, any properties of any
         Obligor, or the estate in bankruptcy of any Obligor in the course of or
         resulting from any such proceedings.

                  (ii) The failure by Lender to file or enforce a claim in any
         proceeding described in the immediately preceding subsection (i) or to
         take any other action in any proceeding to which any Obligor is a
         party.

                  (iii) The release by operation of law of any Obligor from any
         of the Obligations or any other obligations to Lender.

                  (iv) The invalidity, deficiency, illegality, or
         unenforceability of any of the Obligations or the Obligation Documents,
         in whole or in part, any bar by any statute of limitations or other law
         of recovery on any of the Obligations, or any defense or excuse for
         failure to perform on account of force majeure, act of God, casualty,
         impossibility, impracticability, or other defense or excuse whatsoever.



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                  (v) The failure of any Obligor or any other Person to sign any
         guaranty or other instrument or agreement within the contemplation of
         any Obligor, Lender.

                  (vi) The fact that Guarantor may have incurred directly part
         of the Obligations or is otherwise primarily liable therefor.

                  (vii) Without limiting any of the foregoing, any fact or event
         (whether or not similar to any of the foregoing) which in the absence
         of this provision would or might constitute or afford a legal or
         equitable discharge or release of or defense to a guarantor or surety
         other than the actual payment and performance by Guarantor under this
         Guaranty.

         (c) Lender may invoke the benefits of this Guaranty before pursuing any
remedies against any Obligor or any other Person and before proceeding against
any Security now or hereafter existing for the payment or performance of any of
the Obligations. Lender may maintain an action against Guarantor on this
Guaranty without joining any other Obligor therein and without bringing a
separate action against any other Obligor.

         (d) If any payment to Lender by any Obligor is held to constitute a
preference or a voidable transfer under applicable state or federal laws, or if
for any other reason Lender is required to refund such payment to the payor
thereof or to pay the amount thereof to any other Person, such payment to Lender
shall not constitute a release of Guarantor from any liability hereunder, and
Guarantor agrees to pay such amount to Lender on demand and agrees and
acknowledges that this Guaranty shall continue to be effective or shall be
reinstated, as the case may be, to the extent of any such payment or payments.
Any transfer by subrogation which is made as contemplated in Section 6 prior to
any such payment or payments shall (regardless of the terms of such transfer) be
automatically voided upon the making of any such payment or payments, and all
rights so transferred shall thereupon revert to and be vested in Lender.

         (e) This is a continuing guaranty and shall apply to and cover all
Obligations and renewals and extensions thereof and substitutions therefor from
time to time.

         Section 4. Waiver. Guarantor hereby waives, with respect to the
Obligations, this Guaranty, and the other Obligation Documents:

         (a) notice of the incurrence of any Obligation by Borrower, and notice
of any kind concerning the assets, liabilities, financial condition,
creditworthiness, businesses, prospects, or other affairs of Borrower (it being
understood and agreed that: (i) Guarantor shall take full responsibility for
informing itself of such matters, (ii) Lender shall not have any responsibility
of any kind to inform Guarantor of such matters, and (iii) Lender is hereby
authorized to assume that Guarantor, by virtue of its relationships with
Borrower which are independent of this Guaranty, has full and complete knowledge
of such matters whenever Lender extend credit to Borrower or take any other
action which may change or increase Guarantor's liabilities or losses
hereunder).

         (b) notice that Lender, any Obligor, or any other Person has taken or
omitted to take any action under any Obligation Document or any other agreement
or instrument relating thereto or relating to any Obligation.



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         (c) notice of acceptance of this Guaranty and all rights of Guarantor
under Section 34.02 of the Texas Business and Commerce Code, as amended.

         (d) default, demand, presentment for payment, and notice of default,
demand, dishonor, nonpayment, or nonperformance.

         (e) notice of intention to accelerate, notice of acceleration, protest,
notice of protest, notice of any exercise of remedies (as described in the
following Section 5 or otherwise), and all other notices of any kind whatsoever.

         Section 5. Exercise of Remedies. Lender shall have the right to
enforce, from time to time, in any order and at Lender's sole discretion, any
rights, powers and remedies that Lender may have under the Obligation Documents
or otherwise, including judicial foreclosure, the exercise of rights of power of
sale, the taking of a deed or assignment in lieu of foreclosure, the appointment
of a receiver to collect rents, issues and profits, the exercise of remedies
against personal property, or the enforcement of any assignment of leases,
rentals, oil or gas production, or other properties or rights, whether real or
personal, tangible or intangible; and Guarantor shall be liable to Lender
hereunder for any deficiency resulting from the exercise by Lender of any such
right or remedy even though any rights which Guarantor may have against Borrower
or others may be destroyed or diminished by exercise of any such right or
remedy. No failure on the part of Lender to exercise, and no delay in
exercising, any right hereunder or under any other Obligation Document shall
operate as a waiver thereof; nor shall any single or partial exercise of any
right preclude any other or further exercise thereof or the exercise of any
other right. The rights, powers and remedies of Lender provided herein and in
the other Obligation Documents are cumulative and are in addition to, and not
exclusive of, any other rights, powers or remedies provided by law or in equity.
The rights of Lender hereunder are not conditional or contingent on any attempt
by Lender to exercise any of its rights under any other Obligation Document
against any Obligor or any other Person.

         Section 6. Limited Subrogation.

         (a) Until all of the Obligations have been paid and performed in full
Guarantor shall have no right to exercise any right of subrogation,
reimbursement, indemnity, exoneration, contribution or any other claim which it
may now or hereafter have against or to any Obligor or any Security in
connection with this Guaranty (including any right of subrogation under Section
34.04 of the Texas Business and Commerce Code, as amended), and Guarantor hereby
waives any rights to enforce any remedy which Guarantor may have against
Borrower and any right to participate in any Security until such time. If any
amount shall be paid to Guarantor on account of any such subrogation or other
rights, any such other remedy, or any Security at any time when all of the
Obligations and all other expenses guaranteed pursuant hereto shall not have
been paid in full, such amount shall be held in trust for the benefit of Lender,
shall be segregated from the other funds of Guarantor and shall forthwith be
paid over to Lender to be held by Lender as collateral for, or then or at any
time thereafter applied in whole or in part by Lender against, all or any
portion of the Obligations, whether matured or unmatured, in such order as
Lender shall elect.



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            (b) If Guarantor shall make payment to Lender of all or any portion
of the Obligations and if all of the Obligations shall be finally paid in full,
Lender will, at Guarantor's request and expense, execute and deliver to
Guarantor (without recourse, representation or warranty) appropriate documents
necessary to evidence the transfer by subrogation to Guarantor of an interest in
the Obligations resulting from such payment by Guarantor; provided that such
transfer shall be subject to Section 3(d) above and that without the consent of
Lender (which Lender may withhold in its discretion) Guarantor shall not have
the right to be subrogated to any claim or right against any Obligor which has
become owned by Lender, whose ownership has otherwise changed in the course of
enforcement of the Obligation Documents, or which Lender otherwise has released
or wishes to release from its Obligations.

         Section 7. Successors and Assigns. Guarantor's rights or obligations
hereunder may not be assigned or delegated, but this Guaranty and such
obligations shall pass to and be fully binding upon the successors of Guarantor,
as well as Guarantor. This Guaranty shall apply to and inure to the benefit of
Lender and their successors or assigns.

         Section 8. Subordination. Guarantor hereby subordinates and makes
inferior to the Obligations any and all indebtedness now or at any time
hereafter owed by Borrower to Guarantor. Guarantor agrees that after the
occurrence of any Default or Event of Default it will neither permit Borrower to
repay such indebtedness or any part thereof nor accept payment from Borrower of
such indebtedness or any part thereof without the prior written consent of
Lender. If Guarantor receives any such payment without the prior written consent
of Lender, the amount so paid shall be held in trust for the benefit of Lender,
shall be segregated from the other funds of Guarantor, and shall forthwith be
paid over to Lender to be held by Lender as collateral for, or then or at any
time thereafter applied in whole or in part by Lender against, all or any
portions of the Obligations, whether matured or unmatured, in such order as
Lender shall elect.

         Section 9. No Oral Change. No amendment of any provision of this
Guaranty shall be effective unless it is in writing and signed by Guarantor and
Lender, and no waiver of any provision of this Guaranty, and no consent to any
departure by Guarantor therefrom, shall be effective unless it is in writing and
signed by Lender, and then such waiver or consent shall be effective only in the
specific instance and for the specific purpose for which given.

         Section 9. Invalidity of Particular Provisions. If any term or
provision of this Guaranty shall be determined to be illegal or unenforceable
all other terms and provisions hereof shall nevertheless remain effective and
shall be enforced to the fullest extent permitted by applicable law.

         Section 10. Term. This Guaranty shall be irrevocable until all of the
Obligations have been completely and finally paid and performed, no Lender has
any obligation to make any loans or other advances to Borrower, and all
obligations and undertakings of Borrower under, by reason of, or pursuant to the
Obligation Documents have been completely performed, and this Guaranty is
thereafter subject to reinstatement as provided in Section 3(d). All extensions
of credit and financial accommodations heretofore or hereafter made by Lender to
Borrower shall be conclusively presumed to have been made in acceptance hereof
and in reliance hereon.



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         In the event of the death of Guarantor, the obligation of the deceased
shall continue in full force and effect against his estate as to all Obligations
that shall have been created or incurred by Borrower prior to the time when
Lender shall have received notice, in writing, of such death.

         Section 11. Notices. Any notice or communication required or permitted
hereunder shall be given in writing, sent by personal delivery, by telecopy, by
delivery service with proof of delivery, or by registered or certified United
States mail, postage prepaid, addressed to the appropriate party as follows:

         To Guarantor:     Donald F. Moorehead
                           14901 Quorum Drive, Suite 200
                           Dallas, Texas 75240
                           Telecopy:  972-858-6023

         To Lender:        Sanders Morris Harris Inc.
                           600 Travis, Suite 3100
                           Houston, Texas 77002
                           Attention: Bruce R. McMaken
                           Telecopy: 713-250-4294

or to such other address or to the attention of such other individual as
hereafter shall be designated in writing by the applicable party sent in
accordance herewith. Any such notice or communication shall be deemed to have
been given (a) in the case of personal delivery or delivery service, as of the
date of first attempted delivery at the address or in the manner provided
herein, (b) in the case of telecopy, upon receipt, or (b) in the case of
registered or certified United States mail, three days after deposit in the
mail.

         Section 12. Limitation on Interest. Lender and Guarantor intend to
contract in strict compliance with applicable usury law from time to time in
effect, and the provisions of the Credit Agreement and the Note limiting the
interest for which Guarantor is obligated are expressly incorporated herein by
reference.

         Section 13. Loan Document. This Guaranty is a Loan Document, as defined
in the Credit Agreement, and is subject to the provisions of the Credit
Agreement governing Loan Documents.

         Section 15. Fax. This Agreement may be validly executed and delivered
by facsimile or other electronic transmission.

         SECTION 14. GOVERNING LAW. THIS GUARANTY IS TO BE PERFORMED IN THE
STATE OF TEXAS AND SHALL BE GOVERNED BY AND CONSTRUED AND ENFORCED IN ACCORDANCE
WITH THE LAWS OF SUCH STATE WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAW.
GUARANTOR HEREBY IRREVOCABLY SUBMITS ITSELF TO THE NON-EXCLUSIVE JURISDICTION OF
THE STATE AND FEDERAL COURTS OF SUCH STATE OF TEXAS.



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         IN WITNESS WHEREOF, Guarantor has executed and delivered this Guaranty
as of the date first written above.


                                                 -------------------------------
                                                 DONALD F. MOOREHEAD






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