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Exhibit 10.12

Form of
Amendment No. 1
to
PROMISSORY NOTE
 
Between
 
RIO VISTA OPERATING PARTNERSHIP, L.P.
 
And
 
TRANSMONTAIGNE PRODUCT SERVICES INC.

Rio Vista Operating Partnership, L.P. (“Rio”) executed a Promissory Note dated
August 15, 2006 (“Promissory Note”) in favor of TransMontaigne Product Services
Inc. (“TPSI”) pursuant to the terms of that certain Purchase and Sale Agreement
dated August 15, 2005 (“Agreement”) between the same parties. In accordance with
the Amended and Restated Agreement dated August 15, 2006, Rio and TPSI agreed to
amend the Promissory Note, effective as of the Closing Date of the Amended and
Restated Agreement, as follows:
 
1.     Delete the fifth sentence of Section 3 in its entirety and replace it
with the following:

“The entire principal balance and any other amounts due under this Note shall be
due and payable in full on the first anniversary of the Closing Date, as that
term is defined in the Purchase and Sale Agreement dated August 15, 2005, as
amended and restated on August 15, 2006 between Borrower and Holder
(“Maturity”).”

2.     In Section 9, after the date “August 15, 2005,” insert “, as amended and
restated on August 15, 2006.”

3.     The other terms of the Promissory Note remain unchanged and the parties
hereby ratify and confirm them.

RIO VISTA OPERATING PARTNERSHIP, LP
 
TRANSMONTAIGNE PRODUCT SERVICES INC.
     
By:
   
By:
 
Name: Charles Handly
 
Name: William S. Dickey
Title:   President
 
Title:   President

 
 

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