1

                                EXHIBIT 10.19



                      SUBORDINATION AND STANDBY AGREEMENT


         This Subordination and Standby Agreement ("Agreement") is executed by
and among NATIONSBANK OF TEXAS, N.A. ("NationsBank"), GOLD LINE REFINING, LTD.,
a Texas limited partnership ("Debtor") and CITIZENS BANK AND TRUST COMPANY, a
Missouri bank ("Citizens Bank"), effective as of the effective date specified
hereinbelow, as follows:


                                  Definitions

       "Citizens Bank" means Citizens Bank and Trust Company, a Missouri bank
       with its principal place of business located in Chillicothe, Missouri.

       "Citizens Bank Letter of Credit" means the certain Letter of Credit
       dated on or about even date herewith issued by Citizens Bank for the
       account of Debtor and for the benefit of NationsBank in the face amount
       of $1,700,000.00, and any and all renewals, extensions, amendments,
       modifications, supplements or replacements thereof.

       "Citizens Bank Obligations" means all obligations and indebtedness,
       including without limitation reimbursement obligations, accrued
       interest, fees, costs, expenses and other amounts now or hereafter owing
       by Debtor to Citizens Bank under the Citizens Bank Reimbursement
       Agreement, or otherwise in connection with the Citizens Bank Letter of
       Credit, and any and all renewals, amendments, modifications or
       extensions thereof.

       "Citizens Bank Reimbursement Agreement" means, collectively, the certain
       Loan and Reimbursement Agreement dated as of November 2, 1990 by and
       among Debtor, Citizens Bank and Guarantors, as amended by (i) the
       certain First Amendment and Supplement to Loan and Reimbursement
       Agreement dated as of November 14, 1990 among the same parties, (ii) the
       certain Second Amendment and Supplement to Loan and Reimbursement
       Agreement dated as of April 15, 1991 among the same parties, and (iii)
       the certain letter dated November 7, 1991 from Citizens Bank to Debtor
       and Guarantors (excluding Gold Line Services, Inc.), and (iv) the
       certain Third Amendment and Supplement to Loan and Reimbursement
       Agreement dated as of March 22, 1995, among the same parties (excluding
       Gold Line Services, Inc.), and any and all other agreements or
       instruments between Borrower and Citizens Bank in respect of the
       Citizens Bank Letter of Credit, and any and all renewals, amendments,
       modifications, extensions or replacements thereof, respectively,
       provided, that "Citizens Bank Reimbursement Agreement" does not include
       any guaranty, pledge agreement, security agreement or other agreement
       between Citizens Bank and any Guarantor (other than Earl L. Thomas) to
       which Debtor is not a party and under which neither Debtor nor any of
       its property are bound.

       "Debtor" means Gold Line Refining, Ltd., a Texas limited partnership
       with its principal place of business located at 7324 Southwest Freeway,
       Suite 600, Houston, Texas 77074,

       "Guarantor" means any of Gold Line Services, Inc., a Texas corporation,
       JWP Capital, Inc., a Texas corporation, Marceline Investors, Inc., a
       Missouri corporation, Earl L. Thomas (in his capacity as a party to any
       agreements with Citizens Bank) and wife Rosiland H. Thomas, Jerry W.
       Porter and wife Mary A. Porter, Don O. Walsworth and wife Audrey
       Walsworth, and "Guarantors" collectively means all of such parties.

       "NationsBank" means NationsBank of Texas, N.A., a national bank with its
       principal place of business located at NationsBank Plaza, 901 Main
       Street, Dallas, Texas 75202.

       "NationsBank Collateral" means all "Collateral" defined in the
       NationsBank Credit Agreements (which definition hereby is incorporated
       herein by references, including without limitation all of Debtor's
       accounts, chattel paper, general intangibles, inventory, equipment,
       documents and instruments, now owned and hereafter acquired, and all
       proceeds of any of the foregoing (provided, that notwithstanding the
       terms of the NationsBank Credit Agreements, as the same may be amended
       from time to time, for purposes of this Agreement "NationsBank
       Collateral" does not include any property owned by any Guarantor other
       than Earl L. Thomas and in which Debtor has no interest).

       "NationsBank Credit Agreements" means the certain Financing and Security
       Agreement dated on or about even date herewith between NationsBank and
       Debtor and all "Loan Documents" as defined therein, as the same may be
       amended, supplemented or extended from time to time.

       "NationsBank Obligations" means all "Obligations" defined in the
       NationsBank Credit Agreements (which definition hereby is incorporated
       herein by reference, including without limitation all obligations and
       indebtedness for loans, accrued interest, fees, costs and expenses





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       under the NationsBank Credit Agreements, as the same may be renewed,
       modified, or extended (provided, that notwithstanding the terms of the
       NationsBank Credit Agreements, as the same may be amended from time to
       time, for purposes of this Agreement "NationsBank Obligations" is limited
       to NationsBank Obligations owing by Debtor).



                                    Recitals

       It is proposed that Debtor and NationsBank enter into the NationsBank
       Credit Agreements to establish a credit facility for loans by
       NationsBank to Debtor, subject to the terms thereof, reference to which
       is hereby made.  The NationsBank Obligations will be secured by
       continuing security interests granted by Debtor to NationsBank in the
       NationsBank Collateral.

       In connection with the NationsBank Credit Agreements, NationsBank has
       required Debtor to deliver to NationsBank the Citizens Bank Letter of
       Credit, in form satisfactory to NationsBank, as additional credit in
       support of the credit facilities available to Debtor under the
       NationsBank Credit Agreement, provided, that all reimbursement and
       repayment obligations in connection therewith now or hereafter owing by
       Debtor to the issuer of such letter of credit be subordinated in right
       of payment and claim to the prior payment and performance in full of the
       NationsBank Obligations.

       Debtor proposes to deliver to NationsBank the Citizens Bank Letter of
       Credit.

       As a condition to entering into the NationsBank Credit Agreements,
       NationsBank has required that the Citizens Bank Obligations be
       subordinated as provided hereinbelow.  Citizens Bank acknowledges that
       it will benefit from its issuance of the Citizens Bank Letter of Credit
       and the credit accommodations available to Debtor under the NationsBank
       Credit Agreements, and has determined that execution of this Agreement
       is in its best interest.

       NOW THEREFORE, for value consideration, the receipt of which hereby is
acknowledged, and in consideration of the mutual benefits and agreements
provided herein, Citizens Bank, Debtor and NationsBank hereby agree as follows:



                                       Agreement

       1.      Citizens Bank and Debtor each agrees that the Citizens Bank
Obligations shall be and hereby are deemed to be fully subordinated in right of
payment and claim in favor of the NationsBank Obligations.  Until termination of
this Agreement, Citizens Bank agrees that it will not request, demand, accept or
receive from Debtor, and Debtor agrees that it will not pay or deliver to
Citizens Bank, whether by payment, prepayment, setoff or otherwise, any payment,
amount, credit or reduction of all or any part of the Citizens Bank Obligations,
of any security therefor, except as specifically allowed pursuant to paragraph 2
below.

       2.      Notwithstanding any other provision of this Agreement, Debtor may
pay to Citizens Bank and Citizens Bank may receive and retain from Debtor
Citizens Bank's customary letter of credit fees in consideration of, and
reimbursement of reasonable attorneys fees and reimbursable disbursements
incurred in connection with, Citizens Bank's issuance of the Citizens Bank
Letter of Credit as specifically provided in the Citizens Bank Reimbursement
Agreement and provided further, that, subject to paragraph 13, Citizens Bank may
accept and receive from any Guarantor (other than Earl L. Thomas) and any
Guarantor (other than Earl L. Thomas) may pay and deliver to Citizens Bank, by
way of payment, prepayment, set off or otherwise, any payment amount, credit or
reduction of any and all Citizens Bank Obligations guaranteed by any such
Guarantor, and Citizens Bank may foreclose upon and may pursue any other
remedies it may have, at law or in equity, against any Guarantor (other than
Earl L. Thomas) and any and all assets and collateral pledged by any such
Guarantor to Citizens Bank to secure such Guarantor's guarantee: and Citizens
Bank shall have no obligation to pay to NationsBank, or otherwise account to
NationsBank, for any such amount.

       3.      Until termination of this Agreement, Citizens Bank and Debtor
each agrees with NationsBank as follows:

               a.      In the event of any liquidation or dissolution of Debtor,
       whether partial of complete, voluntary or involuntary, by operation of
       law or otherwise, or in the event of any receivership, insolvency or
       bankruptcy proceedings by or against Debtor under any bankruptcy or
       insolvency laws, any and all payments or distributions of any kind or
       character made by or on behalf of Debtor or its estate, whether in cash,
       securities, or other property, which thereafter shall be payable or
       deliverable to Citizens Bank upon or with respect to any portion of the
       Citizens Bank Obligations shall immediately be paid or delivered directly
       to NationsBank for application (as liquidated) in reduction of the
       NationsBank Obligations, whether or not then due or mature, in such
       manner as NationsBank shall determine in its sole discretion;
         



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                 b.       In the event of any bankruptcy or insolvency
         proceedings or any assignment to or for the benefit of creditors
         respecting Debtor, or in the event a receiver is appointed for Debtor
         or its property, NationsBank shall have the right to file a claim in
         such proceedings respecting it rights under this Agreement, and to
         collect and receive all distributions that may be declared or become
         payable under the Citizens Bank Obligations (up until full payment of
         the NationsBank Obligations).

                 c.       Citizens Bank shall not assign or transfer the
         Citizens Bank Obligations or the Citizens Bank Reimbursement
         Agreement, or any claim thereunder, unless such assignment or transfer
         is made by Citizens Bank and accepted by the assignee or transferee
         expressly in writing expressly subject to this Agreement after prior
         written notice thereof to NationsBank; and

                 d.       Citizens Bank shall not make demand on Debtor under
         the Citizens Bank Reimbursement Agreement, or file suit to enforce or
         collect same, without the prior written consent of NationsBank.

         4.      Notwithstanding anything to the contrary (if any) as may be
provided in the Citizens Bank Reimbursement Agreement, until termination of
this Agreement no payment of any Citizens Bank Obligations shall be demanded by
Citizens Bank or made by Debtor, except as expressly allowed by paragraph 2 of
this Agreement.  Any payment of the Citizens Bank Obligations except as
expressly allowed by paragraph 2 of this Agreement are expressly prohibited
without the prior written consent of NationsBank.  Citizens Bank and Debtor
agree, and represent to NationsBank, that there are no Citizens Bank
Obligations except as evidenced by the Citizens Bank Reimbursement Agreement.

         5.      The Citizens Bank Reimbursement Agreement hereby is deemed to
be subject to all of the terms and provisions of this Agreement.  The execution
and delivery by Citizens Bank of this Agreement shall be deemed to amend and
supplement the Citizens Bank Reimbursement Agreement to the extent provided
herein, provided, that such amendment and supplement shall not inure to the
benefit of or be enforceable by any Guarantor.  Debtor and Citizens Bank agree
that they will not modify, amend, restructure, renew, or otherwise change the
Citizens Bank Reimbursement Agreement, or any of the terms thereof, or the
obligations evidenced thereby, without the prior written consent of
NationsBank, other than amendments that do not change the terms of payment or
increase the amount of Debtor's obligations or the extent of Citizens Bank's
interests thereunder, it being understood that all of such amended or changed
terms shall remain subject to the terms of this Agreement.

         6.      Citizens Bank and Debtor each agrees that NationsBank's
continuing rights in and to the NationsBank Collateral are and shall be first,
senior and prior to any rights now or hereafter claimed by Citizens Bank with
respect to any property included therein.  Any and all security interests,
liens, mortgages, or other rights now or hereafter claimed by Citizens Bank
with respect to any of such property shall be and hereby are expressly
subordinated and made junior to any and all security interests, liens,
mortgages, or rights now or hereafter claimed by NationsBank with respect to
the NationsBank Collateral.  Citizens Bank represents that it has no interest
in the NationsBank Collateral other than as provided by the Citizens Bank
Reimbursement Agreement as the same exists as of the effective date of this
Agreement, and Debtor and Citizens Bank each agrees that Debtor hereafter shall
not grant to Citizens Bank any additional security interest, lien or other
interest in any property included within the NationsBank Collateral without the
prior written consent of NationsBank.

         7.      Until termination of this Agreement Citizens Bank agrees that
it will not (i) take any action to foreclose, repossess, marshal, control, or
exercise remedies with respect to any property included within the NationsBank
Collateral, or take any other action with respect to Debtor or any of its
property which could reasonably be expected to interfere with the daily
operation of Debtor's business or (ii) make any contact or communications,
directly or indirectly (including but not limited to notification or
confirmation) with any account debtor or obligor on any accounts, chattel
paper, instruments, general intangibles or other property included within the
NationsBank Collateral, without the prior written consent of NationsBank.
Citizens Bank agrees that if it from time to time comes into possession of any
payments, distributions, property, security, or proceeds in respect of
obligations owing by any such account debtors, all of such amount shall be held
in trust for the benefit of NationsBank and shall be paid forthwith to
NationsBank for the account of Debtor.

         8.      In the event any payment, prepayment, distribution,
instruments, checks or other items, property or security, or proceeds thereof,
at any time is received by Citizens Bank from Debtor, or in respect of any
property of Debtor, in respect of the Citizens Bank Obligations other than as
expressly allowed pursuant to paragraph 2 above, Citizens Bank agrees forthwith
to deliver same to NationsBank in the form received, with any necessary
endorsement or assignment by Citizens Bank (without recourse, which Citizens
Bank agrees to provide upon request by NationsBank), for application in
reduction of the NationsBank Obligations, whether or not due or mature, and
until so delivered, the same shall be held in trust by Citizens Bank for the
benefit of NationsBank as the property of NationsBank, for the account of
Debtor.  In the absence of any necessary endorsement or assignment





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by Citizens Bank, NationsBank is irrevocably appointed as attorney-in-fact with
full power of substitution, coupled with an interest, with full authority for
the limited purpose to make any such endorsement or assignment on behalf of
Citizens Bank as may be necessary to collect or enforce same (provided, that it
is agreed that any such endorsement or assignment shall be deemed to be without
recourse against, or warranty by, Citizens Bank).

         9.      It is understood and agreed that NationsBank may release any
person or entity now or hereafter liable upon any of the NationsBank 
Obligations, or permit substitutions, withdrawals or release of any of the 
NationsBank Collateral or any other security or collateral at any time securing
same, or renew, extend or accept partial payments upon any of the NationsBank
Obligations, or amend or modify the terms of any instrument or agreement
evidencing or securing same, or any part thereof, in such manner and at such
times from time to time, as NationsBank may determine in its sole discretion,
without notice to or consent from Citizens Bank and without in any manner
impairing the rights and obligations under this Agreement.  NationsBank shall
not at any time be required to institute suit or exercise or exhaust remedies
against any person or entity obligated to pay any of the NationsBank
Obligations, or against the NationsBank Collateral, the Citizens Bank Letter of
Credit or any other security or credit support for the NationsBank Obligations,
prior to exercising its rights or receiving the benefits of this Agreement.
NationsBank shall be entitled to exercise and pursue rights and remedies, or
defer or refrain from exercising same, from time to time, in such order and in
such manner as NationsBank may determine in its sole discretion.

         10.     The subordinations and priorities specified in this Agreement
are applicable irrespective of the validity or the time or order of attachment
or perfection of the security interests referred to herein, the time or order of
filing of financing statements, the acquisition of purchase money or other
security interests, or the time of giving or failure to give notice with
respect to any purchase money or other security interests.  Without limiting
the foregoing, Citizens Bank agrees that, contemporaneously upon execution
hereof, Citizens Bank shall deliver to NationsBank for filing an executed UCC-3
statement of amendment relative to each presently effective financing statement
maintained by Citizens Bank covering any property included within the
NationsBank Collateral, therein expressly stating as follows:

         "Secured Party's rights under the above referenced financing statement,
         and all interests claimed by Secured Party in the collateral described
         therein, are subordinate to the interests of NationsBank of Texas, N.A.
         as provided by the certain Subordination and Standby Agreement dated
         March 22, 1995 among Debtor, Secured Party NationsBank of Texas, N.A.
         (as may be amended from time to time), reference to which hereby is
         made."

         11.     This Agreement is an irrevocable and continuing agreement of
subordination, and NationsBank may continue to rely upon same in lending
money, extending credit, and making other financial accommodations to or for
the account of Debtor, without notice to Citizens Bank, pursuant to the terms
of any agreements now or hereafter existing between NationsBank and Debtor.

         12.     Debtor and NationsBank agree that, to the extent allowed by
law, Citizens Bank shall be subrogated to all rights of NationsBank in respect
of the NationsBank Obligations and the NationsBank Collateral to the extent of
payments, if any, recovered by NationsBank from claims owing by Debtor to
Citizens Bank as provided by paragraph 3(a) and paragraph 3(b), provided that
Citizens Bank shall have no right to pursue or enforce any such subrogation
rights, or demand or receive any payments in respect thereof, until termination
of this Agreement, subject to the provisions of paragraph 15, and provided
further, that NationsBank makes no representations or warranties in respect of
the NationsBank Obligations, the NationsBank Collateral, Citizens Bank's
subrogation rights, if any, or the priority thereof, in respect of any person.

         13.     Citizens Bank and Debtor each agrees that all obligations and
indebtedness now or hereafter owing to Citizens Bank by Earl L. Thomas (Earl
Thomas) or any other person or entity serving as general partner of Debtor
shall be and hereby are deemed to be fully subordinated in right of payment and
claim in favor of the NationsBank Obligations.  Until termination of this
Agreement, Citizens Bank agrees that it will not request, demand, accept or
receive from Earl Thomas or any such other person or entity serving as general
partner of Debtor, whether by payment, prepayment, suit, setoff or otherwise,
any payment, amount, credit or reduction of, or in respect of, all or any part
of such obligations and indebtedness owing to Citizens Bank, or the Citizens
Bank Obligations, or any security therefor.  Until termination of this
Agreement Citizens Bank agrees that it will not take any action to foreclose,
repossess, marshal, control, or exercise remedies with respect to any property
(including without limitation the general partner interest) now or hereafter
owned by Earl Thomas or any other person or entity serving as general partner
of Debtor, or take any other action with respect to Earl Thomas or such other
person or entity which could reasonably be expected to interfere with the daily
operation of Debtor's business.  Subject to the foregoing, however, nothing in
this Agreement shall restrict the rights and remedies of Citizens Bank against
any Guarantor other than Earl Thomas who is not now or hereafter a general
partner of Debtor.





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         14.     Any notice or demand by one party to another under this
Agreement shall be in writing and shall be deemed made and received upon
delivery (via personal delivery, courier, telecopy or other electronic
transmission) to the address specified below, or on the third day following
deposit in the United States mail, postage prepaid, addressed as specified
below:

         Citizens Bank:

               Citizens Bank and Trust Company 
               700 Jackson
               Chillicothe, Missouri 64601-0050
               Attention:  Mr. Edward Douglas, President

         Debtor:

               Gold Line Refining, Ltd.
               7324 Southwest Freeway
               Suite 600, Houston, Texas 77074
               Attention:  Mr. Earl Thomas, General Partner

         NationsBank:

               NATIONSBANK OF TEXAS, N.A. 
               P.O. Box 830732
               Dallas, TX 75283-0732
               Attn:  Business Credit/Regional Manager--URGENT

               Address for hand delivery:

               NATIONSBANK OF TEXAS, N.A.
               NationsBank Plaza, 6th Floor
               901 Main Street
               Dallas, TX
               Attn:  Business Credit/Regional Manager--URGENT

         15.     This Agreement shall terminate upon payment in full of the
NationsBank Obligations and termination of the NationsBank Credit Agreements;
provided however, that in the event, following any such termination, any amount
previously applied in reduction of the NationsBank Obligations is subsequently
set aside, avoided, declared invalid or recovered by Borrower or any trustee or
in bankruptcy, or in the event NationsBank is otherwise required to refund or
repay any such amount pursuant to any applicable law, then the NationsBank
Obligations, and all rights of NationsBank under the NationsBank Credit
Agreements, shall automatically be deemed to be reinstated to the extent of
such amount and the same shall continue to be secured by the NationsBank
Collateral as if such amount had not been so applied; and in such event, all
rights and obligations under this Agreement shall likewise be reinstated and,
until such amount has been recovered by NationsBank, all amounts, if any,
received by Citizens Bank in respect of the Citizens Bank Obligations after
such termination likewise shall be governed by the provisions of this Agreement
as if the same had not been terminated.

         16.     No waiver shall be deemed to have been made by NationsBank of
any of its rights hereunder unless such waiver is in writing and signed by
NationsBank, and any such written waiver shall be limited to the specific
instance specified therein.  The rights of NationsBank hereunder are cumulative
of all other rights of NationsBank under any other agreement with Debtor and
Citizens Bank, respectively, or as otherwise provided by law,

         17.     If any provision of this Agreement is for any reason held
invalid, illegal or unenforceable in any respect, such invalidity, illegality
or unenforceability will not affect any other provision of this Agreement.

         18.     This Agreement is binding upon and inures to the benefit of
the parties hereto and their respective assignees, transferees, and successors.
THIS AGREEMENT SHALL BE GOVERNED AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF
THE STATE OF TEXAS.

         19.     This Agreement may be executed in counterparts, each of which
shall be an original, but all of which, taken together, shall constitute one
and the same instrument.  A telecopy of any such executed counterpart shall be
deemed valid as an original.

         20.     This Agreement is binding upon, and is solely for the benefit
of, NationsBank, Citizens Bank and Debtor, and their respective successors and
assigns and no other person shall have any rights or benefits under this
Agreement.





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         Signed effective as of the 22nd day of March, 1995.


                                  
                                  NATIONSBANK OF TEXAS, N.A.

                                  By:     /s/Dan Lane                         
                                          ------------------------------------
                                          Dan Lane
                                          Vice President


                                  CITIZENS BANK AND TRUST COMPANY

                                  By:     /s/Edward D. Douglas                
                                          ------------------------------------
                                          Edward D. Douglas
                                          President


                                  GOLD LINE REFINING, LTD.

                                  By:     /s/Earl Thomas                      
                                          ------------------------------------
                                          Earl Thomas, General Partner





THE STATE OF TEXAS )
                   )
COUNTY OF DALLAS   )

         BEFORE ME, the undersigned authority, on this day personally appeared
Dan Lane, known to me to be the person and officer whose name is subscribed to
the foregoing instrument, and acknowledged to me that the same was the act of
said NATIONSBANK OF TEXAS, N.A. and that he executed the same for the purposes
and considerations therein expressed.

       GIVEN UNDER MY HAND AND SEAL OF OFFICE this the 22nd day of March, 1995.


                                         
                                         /s/Sherri D. Bender                 
                                         ------------------------------------
                                         NOTARY PUBLIC IN AND FOR
                                         THE STATE OF TEXAS

My Commission Expires:

- ------------------------------------
                                          /s/Sherri D. Bender
                                          [STAMP]
                                          Notary Public, State of Texas,
                                          My Commission Expires 03/14/96      
                                          ------------------------------------
                                          Printed Name






THE STATE OF MISSOURI )
                      )
COUNTY OF LIVINGSTON  )

         BEFORE ME, the undersigned authority, on this day personally appeared 
Edward D. Douglas, known to me to be the person and officer whose name is 
subscribed to the foregoing instrument, and acknowledged to me that the same 
was the act of said Citizens Bank and Trust Company and that he executed the 
same for the purposes and considerations therein expressed.

         GIVEN UNDER MY HAND AND SEAL OF OFFICE this the 20th day of March,
1995.




                                        /s/Rosemary Beck                    
                                        ------------------------------------
                                        NOTARY PUBLIC IN AND FOR
                                        THE STATE OF MISSOURI

My Commission Expires:

May 10, 1996             
- -------------------------
                                        Rosemary Beck                       
                                        ------------------------------------
                                        (Printed Name of Notary)

                                      6
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THE STATE OF TEXAS ) 
                   )
COUNTY OF DALLAS   )

         BEFORE ME, the undersigned authority, on this day personally appeared
Earl Thomas, known to me to be the person whose name is subscribed to the
foregoing instrument, and acknowledged to me that the same was the act of said
Gold Line Refining, Ltd. and that he executed the same for the purposes and
considerations therein expressed.

         GIVEN UNDER MY HAND AND SEAL OF OFFICE this the 22 day of March, 1995.


                                         /s/Sherri D. Bender            
                                         -------------------------------
                                         NOTARY PUBLIC IN AND FOR
                                         THE STATE OF TEXAS


My Commission Expires:

- -------------------------

                                         [STAMP]
                                         Notary Public, State of Texas,
                                         My Commission Expires 03/14/96      
                                         ------------------------------------
                                         Printed Name

   8
                         THIRD AMENDMENT AND SUPPLEMENT
                                     TO THE
                        LOAN AND REIMBURSEMENT AGREEMENT


                 THIS THIRD AMENDMENT AND SUPPLEMENT TO THE LOAN AND
REIMBURSEMENT AGREEMENT (this "Third Amendment"), dated as of March 22, 1995,
is made by and among Gold Line Refining, Ltd., a Texas limited partnership (the
"Borrower"), JWP Capital, Inc., a Texas corporation ("JWP"), Marceline
Investors, Inc., a Missouri corporation ("Marceline"), Earl L. and Rosiland H.
Thomas, husband and wife (both singularly and collectively, "Thomas"), Jerry W.
and Mary A. Porter, husband and wife (both singularly and collectively,
"Porter"), Don O. and Audrey H.  Walsworth, husband and wife (both singularly
and collectively, "Walsworth") (JWP, Marceline, Thomas, Porter and Walsworth
are collectively referred to herein as the "Guarantors"), and Citizens Bank and
Trust Company, a Missouri bank (the "Bank").

                                   RECITALS:

                 A.       The Borrower, the Guarantors, Gold Line Services,
Inc., a Texas corporation ("Gold Line Services"), and the Bank are parties to
the Loan and Reimbursement Agreement, dated as of November 2, 1990 (the
"Original Agreement"), as amended and supplemented by (i) the First Amendment 
and Supplement to Loan and Reimbursement Agreement, dated November 14, 1990 (the
"First Amendment"), by and among the Borrower, the Guarantors, Gold Line
Services and the Bank, (ii) the Second Amendment and Supplement to the Loan and
Reimbursement Agreement, dated as of April 15, 1991 (the "Second Amendment"),
by and among the Borrower, the Guarantors, Gold Line Services and the Bank, and
(iii) that certain letter, dated November 7, 1991 (the "Letter Supplement"),
from the Bank to the Borrower and the Guarantors.

                 B.       The Borrower, the Guarantors and the Bank now desire
to enter into this Third Amendment to amend and supplement the Original
Agreement, as previously amended and supplemented to date (the Original
Agreement, as amended by the First Amendment, the Second Amendment, the Letter
Supplement and this Third Amendment, is referred to herein as the "Agreement").

                 C.       The Borrower has entered or is about to enter into
with NationsBank of Texas, N.A., a national bank ("NationsBank"), a Financing
and Security Agreement, dated on or about even date herewith (collectively,
including all "Loan Documents" as defined therein, the "NationsBank Credit
Agreements"), pursuant to which the Borrower will obtain up to $15 million in
new financing from NationsBank.
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                 D.       The Borrower has entered or is about to enter into
with MG Trade Finance Corp. ("MG") certain amended instruments and agreements
evidencing existing loans to the Borrower, each dated on or about even date
herewith (collectively, the "Amended MG Agreements"), to facilitate the
execution and delivery of the NationsBank Credit Agreements.

                 E.       The Borrower, the Guarantors and the Bank now desire
to amend and supplement (i) the Original Agreement, as previously amended and
supplemented to date, (ii) the Security Agreement, as previously amended and
supplemented to date, and (iii) the Thomas Security Agreement, as previously
amended and supplemented to date, to facilitate the execution and delivery of
the NationsBank Credit Agreements, on the terms and subject to the conditions
set forth herein.

                 F.       The Borrower desires to have the Bank issue, and the
Bank is willing to issue, an irrevocable standby letter of credit, in the
principal amount of $1,700,000, in favor of NationsBank, for the account of the
Borrower, substantially in the form attached hereto as Exhibit A (the
"NationsBank Additional Letter of Credit"), on the terms and subject to the
conditions set forth herein.

                 G.       The Borrower desires to have the Bank enter into, and
the Bank is willing to enter into, a Subordination and Standby Agreement with
NationsBank, substantially in the form attached hereto as Exhibit B (the
"NationsBank Subordination Agreement"), on the terms and subject to the
conditions set forth herein.

                 H.       The Borrower desires to have the Bank enter into, and
the Bank is willing to enter into, a third letter agreement with MG and
American International Refinery, Inc. ("AIRI"), substantially in the form
attached hereto as Exhibit C (the "Third MG Letter Agreement"), on the terms
and subject to the conditions set forth herein.

                                   AGREEMENT

                 ACCORDINGLY, in consideration of the premises set forth above,
the mutual covenants and agreements set forth herein and for other good and
valuable consideration, receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

                 1.       Definitions.  All capitalized terms used herein and
not otherwise defined herein shall have the meaning given to each such term in
the Original Agreement, as previously amended and supplemented to date.





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                 2.       NationsBank Additional Letter of Credit.

                 (a)      Upon satisfaction of the conditions set forth in
paragraph 13 of this Third Amendment, the Bank will (i) execute and issue the
NationsBank Additional Letter of Credit in favor of NationsBank for the account
of the Borrower and (ii) deliver the NationsBank Additional Letter of Credit to
NationsBank.

                 (b)      The Borrower and the Guarantors hereby acknowledge
and agree that the NationsBank Additional Letter of Credit is an "Additional
Letter of Credit," as contemplated by Section 3.1(b) of the Agreement, and
as such is subject to all of the terms and conditions of the Agreement.

                 3.       NationsBank Subordination Agreement.  Upon
satisfaction of the conditions set forth in paragraph 13 of this Third
Amendment, the Bank shall execute and deliver to NationsBank the NationsBank
Subordination Agreement.

                 4.       Third MG Letter Agreement.  Upon satisfaction of the
conditions set forth in paragraph 13 of this Third Amendment, the Bank shall
execute and deliver to MG the Third MG Letter Agreement.

                 5.       Amendment of the Agreement.  Upon satisfaction of the
conditions set forth in paragraph 13 of this Third Amendment, the Borrower, the
Guarantor and the Bank hereby amend and supplement the Original Agreement, as
previously amended and supplemented to date, to provide that notwithstanding
the terms and provisions of any representation, warranty, covenant, Default or
Event of Default, condition or other term or provision in the Agreement:

                 (a)      the execution and delivery by the Borrower of the
NationsBank Credit Agreements and the Amended MG Agreements, and the
performance by the Borrower of its obligations under the NationsBank Credit
Agreements and the Amended MG Agreements, shall not be, or result in, a breach
of any representation, warranty or covenant, or any Default or Event of
Default, under the Agreement, and this paragraph 5 shall supersede and take
precedence over any representation, warranty, covenant, Default or Event of
Default, condition or other term or provision in the Agreement otherwise
inconsistent herewith, and

                 (b)      the Bank expressly consents to, and irrevocably
waives any Default or Event of Default which, but for this paragraph 5, might
have resulted from, the execution and delivery of the NationsBank Credit
Agreements or the Amended MG Agreements, or the performance by the Borrower of
its obligations under the NationsBank Credit Agreements or the Amended MG
Agreements, or both.





                                       3
   11
                 6.       Additional Amendments to the Agreement.  Upon
satisfaction of the conditions set forth in paragraph 13 of this Third
Amendment, the Borrower, the Guarantors and the Bank further agree to amend and
supplement the Original Agreement, as previously amended and supplemented to
date, as follows:

                 (a)      Section 1.1 is hereby amended by deleting the
definition of the term "Letter of Credit" the first time it appears in such
section (but retaining the definition of such term the second time it appears
in such section).

                 (b)      Section 6.10 is hereby deleted in its entirety.

                 (c)      Section 7.4 is hereby amended by deleting said
Section 7.4 in its entirety and replacing it with the following:

                          Section 7.4.     Distributions to Partners.

                          (a)     The Borrower shall not make any distributions
                 with respect to, or redeem or otherwise acquire, any general
                 or limited partnership interest (i) except as expressly set
                 forth in Section 7.4(b), without the prior written consent of
                 the Bank or (ii) which would be in violation of the Borrower's
                 covenant (the "NationsBank Capital and Surplus Retention
                 Covenant") with NationsBank set forth in Section 6.23 of the
                 NationsBank Credit Agreements.

                          (b)     Without the prior written consent of the
                 Bank, during any fiscal year the Borrower may make periodic
                 cash distributions to the partners in an amount not greater in
                 the aggregate than 40% of the Borrower's year to date net
                 income to be used by the partners solely for the payment of
                 federal and state income taxes.

                 (d)      Section 8.1 is amended by adding the word "or" at the
end of subsection 8.1(m), and inserting after such subsection (m) and prior
to the flush language immediately following such subsection (m) the following
new subsection:

                          (n)     An Event of Default (as defined in the
                 NationsBank Credit Agreements) shall be declared by
                 NationsBank under the NationsBank Credit Agreements.

                 7.       Amendment of the Security Agreement.  Upon
satisfaction of the conditions set forth in paragraph 13 of this Third
Amendment, the Bank and the Borrower hereby amend and supplement the Security
Agreement, as previously amended and supplemented to date, to provide that,
notwithstanding the terms and provisions of any representation, warranty,
covenant, default





                                       4
   12
or event of default, condition or other term or provision in the Security
Agreement:

                 (a)      the execution and delivery by the Borrower of the
NationsBank Credit Agreements and the Amended MG Agreements, and the
performance by the Borrower of its obligations under the NationsBank Credit
Agreements and the Amended MG Agreements, shall not be, or result in, a breach
of any representation, warranty, covenant, or any default or event of default,
under the Security Agreement, and this paragraph 7 shall supersede and take
precedence over any representation, warranty, covenant, default or event of
default, condition or other term or provision in the Security Agreement
otherwise inconsistent herewith; and

                 (b)      the Bank expressly consents to, and irrevocably
waives any default or event of default under the Security Agreement which, but
for this paragraph 7, might have resulted from, the execution and delivery of
the NationsBank Credit Agreements or the Amended MG Agreements, or the
performance by the Borrower of its obligations under the NationsBank Credit
Agreements or the Amended MG Agreements, or both.

                 8.       Amendment of the Thomas Security Agreement.  Upon
satisfaction of the conditions set forth in paragraph 13 of this Third
Amendment, the Bank and Thomas hereby amend and supplement the Thomas Security
Agreement, as previously amended and supplemented to date, to provide that,
notwithstanding the terms and provisions of any representation, warranty,
covenant, default or event of default, condition or other term or provision in
the Thomas Security Agreement:

                 (a)      the execution and delivery by Thomas of the
NationsBank Credit Agreements and the Amended MG Agreements, and the
performance by Thomas of his obligations under the NationsBank Credit
Agreements and the Amended MG Agreements, shall not be, or result in, a breach
of any representation, warranty, covenant, or any default or event of default,
under the Security Agreement, and this paragraph 8 shall supersede and take
precedence over any representation, warranty, covenant, default or event of
default, condition or other term or provision in the Thomas Security Agreement
otherwise inconsistent herewith, and

                 (b)      the Bank expressly consents to, and irrevocably
waives any default or event of default under the Thomas Security Agreement
which, but for this paragraph 8, might have resulted from, the execution and
delivery of such NationsBank Credit Agreements or the Amended MG Agreements, or
the performance by Thomas of his obligations under such NationsBank Credit
Agreements or the Amended MG Agreements, or both.





                                       5
   13
                 9.       Waiver of Defaults.  Upon satisfaction of the
conditions set forth in paragraph 13 of this Third Amendment, the Bank hereby
waives any and all Defaults and Events of Default which may exist on the date
hereof; provided, however, that the Bank does not waive any Default or Event of
Default which would also be (or with the giving of notice or the passage of
time, or both, would become) an Event of Default (as defined in the NationsBank
Credit Agreements) under the NationsBank Credit Agreements.

                 10.      Certain Representations and warranties.  The Borrower
hereby makes to the Bank each and every representation and warranty made by the
Borrower to NationsBank in the NationsBank Credit Agreements (the "NationsBank
Representations and warranties"), and acknowledges and confirms that the
NationsBank Representations and Warranties are representations and warranties
made in the Agreement and are subject to Section 8.1(g) of the Agreement.

                 11.      Affirmations by the Borrower and the Guarantors.

                 (a)      The Borrower hereby expressly represents, warrants,
covenants and agrees that the Agreement and each of the Security Documents, in
each case as previously amended and supplemented to date, is and remains a
legal, valid and binding obligation of the Borrower, enforceable against the
Borrower in accordance with its terms; subject, however, to the provisions of
this Third Amendment and the agreements contemplated hereby.

                 (b)      Each of the Guarantors hereby expressly represents,
warrants, covenants and agrees that the Agreement and each Guaranty Document to
which such Guarantor is a party, in each case as previously amended and as
supplemented to date, is and remains a legal, valid and binding obligation of
the Guarantor, enforceable against the Guarantor in accordance with its terms;
subject, however, to the provisions of this Third Amendment and the agreements
contemplated hereby.

                 12.      Consents of the Borrower and the Guarantors.  The
Borrower and each of the Guarantors hereby expressly consents and agrees to:

                 (a)     the execution and delivery by the Borrower of the 
NationsBank Credit Agreements;

                 (b)     the execution and delivery by the Borrower of the 
Amended MG Agreements; and

                 (c)     the execution and delivery by the Bank of:

                         (1)      the NationsBank Additional Letter of Credit;





                                       6
   14
                          (2)      the NationsBank Subordination Agreement; and

                          (3)      the Third MG Letter Agreement.

                 13.      Conditions Precedent.  The Bank shall have no
obligations under this Third Amendment unless and until the following
conditions have been met:

                 (a)      the Bank shall have received copies of this Third
Amendment executed by the Borrower and each of the Guarantors;

                 (b)      the Bank shall have received a copy of the
NationsBank Subordination Agreement duly executed by NationsBank;

                 (c)      the Bank shall have received a copy of the Third MG
Letter Agreement duly executed by MG and AIRI;

                 (d)      the NationsBank Credit Agreements shall have been
duly executed and delivered by all parties thereto;

                 (e)      the Borrower shall have paid or caused to be paid to
the Bank the Bank's customary letter of credit fees, as provided in Section 3.2
of this Agreement, and all attorneys' fees and other expenses reasonably
incurred by the Bank in connection with the negotiation, drafting, execution
and delivery of this Third Amendment and the transaction documents completed
hereby;

                 (f)      the Borrower shall have physically delivered and
surrendered, or caused MG to have physically delivered and surrendered, to the
Bank, the original Letter of Credit (Number 005056), originally dated November
18, 1990, issued by Commerce Bank of Kansas City, N.A. ("Commerce Bank"), for
the joint account of the Borrower and the Bank and for the benefit of MG, in
the original face amount of $2,500,000 (the "Commerce Letter of Credit"), with
a remaining undrawn balance of $1,700,000, together with such releases and
other documentation as Commerce Bank may reasonably request in order to effect
the cancellation of the Commerce Letter of Credit; and

                 (g)      the Borrower shall have executed and delivered to
this Bank such additional documents and instruments as the Bank may reasonably
request to evidence and consummate the transactions contemplated by this Third
Amendment.

                 14.      Governing Law.  This Third Amendment and all rights
hereunder shall be governed by and construed in accordance with the laws of the
State of Missouri.

                 15.      Counterparts.  This Third Amendment may be executed
in any number of counterparts, all of which taken





                                       7
   15
together shall constitute one agreement, and any party hereto may execute this
Third Amendment by signing any such counterpart.

                 16.      Execution and Delivery Via Facsimile.  The parties
hereto agree that the Borrower and each Guarantor may execute and deliver this
Third Amendment by executing an original or a facsimile copy of this Third
Amendment and transmitting such executed copy via facsimile to the Bank at
816-646-5594, Attn: Edward D. Douglas.  Each party that transmits an executed
copy of this Third Amendment to the Bank via facsimile agrees (i) to be bound
by the terms of this Third Amendment upon the Bank's receipt of such facsimile
and (ii) to promptly deliver a hard copy of the executed copy of this Third
Amendment to the Bank via courier for next day delivery.





                                       8
   16
                 IN WITNESS WHEREOF, the parties hereto have executed and
delivered this Third Amendment as of the date first above written.


                                   
                                    GOLD LINE REFINING, LTD.


                                    By:   /s/ Earl L. Thomas                   
                                          ------------------------------------
                                          Name:       Earl L. Thomas
                                          Title:      General Partner

                                    JWP CAPITAL, INC.


                                    By:   /s/ Jerry W. Porter                
                                          ------------------------------------
                                          Name:       Jerry W. Porter
                                          Title:      President


                                    MARCELINE INVESTORS, INC.


                                    By:                   
                                          ------------------------------------
                                          Name:       Don O. Walsworth
                                          Title:      President

                                    /s/ Frank L. Thomas
                                    ------------------------------------------
                                    Earl L. Thomas


                                    /s/ Rosiland H. Thomas
                                    ------------------------------------------
                                    Rosiland H. Thomas

                                    /s/ Jerry W. Porter
                                    ------------------------------------------
                                    Jerry W. Porter

                                    /s/ Mary A. Porter
                                    ------------------------------------------
                                    Mary A. Porter

                                    /s/ Don O. Walsworth
                                    ------------------------------------------
                                    Don O. Walsworth

                                    /s/ Audrey H. Walsworth
                                    ------------------------------------------
                                    Audrey H. Walsworth


                                    CITIZENS BANK AND TRUST COMPANY

                                    By:   /s/ Edward D. Douglas
                                          ------------------------------------
                                          Name:       Edward D. Douglas
                                          Title:      President