Exhibit 10.9
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                                FOURTH AMENDMENT
                       TO THE CONTRACTOR SERVICE AGREEMENT
           BETWEEN THE UNIVERSITY OF TEXAS MEDICAL BRANCH AT GALVESTON
                                       AND
                      ENVIROCLEAN MANAGEMENT SERVICES, INC.

This fourth  amendment (the "Fourth  Amendment")  is to the  Contractor  Service
Agreement (the  "Agreement" or the  "Contract")  between The University of Texas
Medical Branch at Galveston,  a component institution of The University of Texas
System  which is an  agency  of the State of  Texas,  ("UTMB")  and  EnviroClean
Management  Services,  Inc.  ("EMSI') and which  Agreement  became  effective on
December 8, 1995.

         WHEREAS,  UTMB and BMI  Services,  Inc.  entered into the  Agreement to
provide medical waste disposal services for UTMB on December 8, 1995;

         WHEREAS, BMI Services, Inc. assigned its rights and responsibilities to
EMSI on March 4, 1996;

         WHEREAS,  UTMB and EMSI,  Inc.  have  amended  the  Agreement  on three
previous occasions;

         WHEREAS,  UTMB AND EMSI desire to amend the  Agreement to allow EMSI to
provide  security  other than a performance  bond as  contemplated  by the Third
Amendment;

         NOW THEREFORE,  for and in consideration of the above-stated  premises,
the payments,  and the covenants and agreements herein contained,  UTMB and EMSI
do agree that the Agreement is amended as follows:

The Third Amendment's Attachment A is amended as follows by adding the following
Section 1.4.5:

1.4.5. In lieu of the required $200,000  performance bond,  Contractor may elect
to fund an account  ("Retainage  Account")  which  shall be retained by UTMB and
which UTMB shall return to Contractor upon Contractor's  faithful performance of
the Agreement.

In the event  Contractor  elects to fund the Retainage  Account in the amount of
$125,000 and provided it maintains its current performance bond of $75,000, UTMB
shall  withhold  monthly  an amount  not to exceed Ten  Thousand  and  no/100ths
Dollars  ($10,000)  from  the  proceeds  that  UTMB  would  otherwise  remit  to
Contractor until the Retainage Account equals $125,000.

In the event  Contractor  elects to fund the Retainage  Account in the amount of
$200,000,  UTMB shall withhold  monthly an amount not to exceed Fifteen Thousand
and no/100ths  Dollars  ($15,000)  from the proceeds  that UTMB would  otherwise
remit to Contractor until Retainage Account equals $200,000.

<PAGE>

Contractor  may  elect to  provide a Letter  of  Credit  ("LoC")  in lieu of any
Retainage  Account  provided the LoC  satisfies  the  requirements  of the Third
Amendment's  Section  1.4 and  subject to the  approval of the Office of General
Counsel of The University of Texas System and UTMB. UTMB's approval shall not be
unreasonably withheld.

UTMB shall  return the  Retainage  Account to  Contractor  promptly in the event
Contractor  tenders to UTMB either the required  performance bond or LoC, but in
no event no later than thirty (30) days.

Contractor may elect to provide any combination of a LoC, Retainage Account,  or
Performance  Bond to satisfy the requirements of the Third  Amendment's  Section
1.4.

Except to the extent  specifically  modified by any properly executed amendment,
all the terms and  conditions  of the Agreement as amended are in full force and
effect,  and the parties by their  signatures to this Fourth Amendment do hereby
confirm and adopt the Agreement as amended by this Fourth Amendment.

ENVIROCLEAN MANAGEMENT                         THE UNIVERSITY OF TEXAS
SERVICES, INC.                                 MEDICAL BRANCH AT GALVESTON

By:  /s/  Matt Fleeger                           /s/ Richard S. Moore
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Title: President/CEO                           Richard S. Moore
                                               Vice President for Business
                                               and Administration

Date: Jan 15, 2002                             Date: Jan 17 2001
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