Exhibit 10.34


                     LYONDELL-CITGO REFINING COMPANY LTD.
                                 $100,000,000


                               CREDIT AGREEMENT

                           Dated as of July 1, 1993

                             CONTINENTAL BANK N.A.

                                   As Agent



                              TABLE OF CONTENTS*


                                   ARTICLE I
                                  DEFINITIONS
 
 

                                                                PAGE
                                                                ----
                                                          
SECTION    1.01  Definitions...............................       1
           1.02  Accounting Terms and Determinations.......       9
           1.03  Types of Borrowings.......................       9
 
                                   ARTICLE II
                                   THE CREDIT

SECTION    2.01  Commitments to Lend.......................      10
           2.02  Notice of Committed Borrowings............      10
           2.03  Letters of Credit.........................      11
           2.04  Notice to Banks; Funding of Loans.........      14
           2.05  Notes.....................................      14
           2.06  Maturity of Loans.........................      15
           2.07  Interest Rates............................      15
           2.08  Fees......................................      18
           2.09  Optional Termination or Reduction of
                 Commitments...............................      18
           2.10  Mandatory Termination of Commitments......      19
           2.11  Optional Prepayments......................      19
           2.12  General Provisions as to Payments.........      19
           2.13  Computation of Interest and Fees..........      20
           2.14  Maximum Interest Rate.....................      20
           2.15  Extension of Termination Date.............      22
           2.16  Withholding Tax Exemption.................      23
 

                                  ARTICLE III
                                   CONDITIONS

SECTION   3.01  Effectiveness..............................      24
          3.02  Borrowings.................................      25
 

* The Table of Contents is not a part of this Agreement.

                                       i


 
 
                                                               PAGE
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                                  ARTICLE IV
                       REPRESENTATIONS AND WARRANTIES  

SECTION    4.01  Representations and Warranties of the
                 Borrower.....................................   26


                                   ARTICLE V
                                   COVENANTS

SECTION    5.01  Certain Information to be Furnished by the
                 Borrower.....................................   29
           5.02  Maintenance of Property; Insurance...........   31
           5.03  Limitation on Liens..........................   31
           5.04  Consolidation, Merger........................   33
           5.05  Use of Proceeds..............................   34
           5.06  Compliance with Laws.........................   34
           5.07  No Material Change...........................   34

                                  ARTICLE VI
                                   DEFAULTS

SECTION    6.01  Defaults.....................................   34
           6.02  Notice of Default............................   37


                                  ARTICLE VII
                                   THE AGENT

SECTION    7.01  Appointment and Authorization................   37
           7.02  Agent and Affiliates.........................   37
           7.03  Action by Agent..............................   37
           7.04  Consultation with Experts....................   37
           7.05  Liability of Agent...........................   38
           7.06  Indemnification..............................   38
           7.07  Credit Decision..............................   38
           7.08  Successor Agent..............................   39
 
         
                                      ii 

 
 

                                                                PAGE
                                                                ----
                                                        
                                 ARTICLE VIII
                            CHANGE IN CIRCUMSTANCES

SECTION    8.01  Illegality..................................    39
           8.02  Increased Cost and Reduced Return...........    40
           8.03  Substitute Loans............................    42
           8.04  Regulation D Compensation...................    42
           8.05  Substitution of Bank........................    43

                                  ARTICLE IX
                                 MISCELLANEOUS
SECTION    9.01  Notices.....................................    43
           9.02  No Waiver...................................    44
           9.03  Governing Law...............................    44
           9.04  Expenses; Documentary Taxes; Indemnification    44
           9.05  Amendments, Etc.............................    45
           9.06  Counterparts; Integration...................    46
           9.07  Successors and Assigns......................    46
           9.08  Survival....................................    47
           9.09  Acknowledgment..............................    48
           9.10  Headings....................................    48
           9.11  Sharing of Setoffs..........................    48
           9.12  Collateral..................................    49
           9.13  Consent to Jurisdiction.....................    49
           9.14  Waiver of Jury Trial........................    50
 
 
EXHIBIT A - Note
 
EXHIBIT B - Loans and Principal Payments
 
EXHIBIT C - Form of Assignment and Acceptance

EXHIBIT D - Secretary's Certificate

EXHIBIT E - Certificate of Incumbency

EXHIBIT F - Opinion of General Counsel

                                      iii

 

          CREDIT AGREEMENT dated as of July 1, 1993 among LYONDELL-CITGO
REFINING COMPANY LTD, the BANKS listed on the signature pages hereof and
CONTINENTAL BANK N.A., as Agent.

          The Borrower desires to borrow from time to time amounts not exceeding
in the aggregate $100,000,000 outstanding at any one time from the Banks for its
general corporate purposes, and the Banks are prepared to make loans on the
terms hereof.  Accordingly, the parties hereto agree as follows:



                                   ARTICLE I

                                  DEFINITIONS

SECTION 1.01.  DEFINITIONS.

In addition to terms defined elsewhere in this Agreement, as used in this
Agreement, the following terms have the following meanings (all terms defined in
this Agreement in the singular to have the same meanings when used in the plural
and vice versa):

"ADJUSTED CD RATE" has the meaning set forth in Section 2.07(b).

"ADMINISTRATIVE QUESTIONNAIRE" means, with respect to each Bank, the
administrative questionnaire in the form submitted to such Bank by the Agent and
submitted to the Agent (with a copy to the Borrower) duly completed by such
Bank.

"AGENT" means Continental Bank N.A. its capacity as agent for the Banks
hereunder, and its successors in such capacity.

"APPLICABLE LENDING OFFICE" means, with respect to any Bank, (i) in the case of
its Domestic Loans, its Domestic Lending  Office and (ii) in the case of its
Euro-Dollar Loans, its Euro-Dollar Lending Office.

"ASSESSMENT RATE" has the meaning set forth in Section 2.07(b).

"ASSIGNEE" has the meaning set forth in Section 9.07(c).

"AUTHORIZED OFFICER" and "AUTHORIZED REPRESENTATIVE" of the Borrower shall mean
an officer or other representative of the Borrower designated in the latest
Certificate of Incumbency of the Borrower or Lyondell or Lyondell Refining
Company.  The Agent and the Banks shall be conclusively entitled to rely on the
latest such Certificate of Incumbency of the Borrower delivered to the Agent.

                                       1

 
"BANK" means each bank which is listed on the signature pages hereof as having a
Commitment and which has executed and delivered this Agreement, each Assignee
which becomes a Bank pursuant to Section 9.07(c), each substitute bank which
becomes a Bank pursuant to Section 8.05, and their respective successors.

"BASE RATE" means, for any day, a rate per annum equal to the higher of (i) the
Reference Rate for such day and (ii) the Federal Funds Rate for such day plus
1/4 of 1%.

"BASE RATE LOAN" means a Committed Loan to be made by a Bank as a Base Rate Loan
in accordance with the applicable Notice of Committed Borrowing or pursuant to
Article VIII.

"BORROWER" means LYONDELL-CITGO REFINING COMPANY LTD., a Texas limited liability
company.

"BORROWING" has the meaning set forth in Section 1.03.

"CD BASE RATE" has the meaning set forth in Section 2.07(b).

"CD LOAN" means a Committed Loan to be made by a Bank as a CD Loan in accordance
with the applicable Notice of Borrowing.

"CD MARGIN" has the meaning set forth in Section 2.07(b).

"CERTIFICATE OF INCUMBENCY" shall mean a Certificate of Incumbency described in
Section 3.01 (ii) and any successor or replacement Certificate of Incumbency
delivered hereunder.

"CITGO" means CITGO Petroleum Corporation.

"CODE" means the Internal Revenue Code of 1986, as amended, or any successor
statute.

"COMMITMENT" means, as to each Bank, the amount set forth opposite its name on
the signature pages hereof under the heading "Commitment" which includes the
Maximum Drawing Amount (as such amount may be reduced from time to time as
provided in Sections 2.09 and 2.10).

"COMMITMENT PERCENTAGE" means, with respect to each Bank, the percentage set
forth on the signature pages hereto as such Bank's percentage of the aggregate
Commitments of all of the Banks.

"COMMITTED LOAN" means a loan made by a Bank pursuant to Section 2.01.

                                       2

 
"COMPANY REGULATIONS" means the limited liability company regulations dated as
of July 1, 1993 between Lyondell Refining Company and CITGO Refining Investment
Company.

"CONTROLLED GROUP" means all members of a controlled group of corporations and
all trades or businesses (whether or not incorporated) under common control
which, together with the Borrower, are treated as a single employer under
Section 414(b) or 414(c) of the Code.

"CONTRIBUTION AGREEMENT" means the Contribution Agreement dated as of July 1,
1993 between Borrower and Lyondell.

"CRUDE SUPPLY AGREEMENT" means the Crude Supply Agreement dated as of May 5,
1993 between Borrower and Lagoven, S. A., including any supplemental agreements.

"DEBT" of any Person means at any date, without duplication, (i) all obligations
of such Person for borrowed money, (ii) all obligations of such Person evidenced
by bonds, debentures, notes or other similar instruments, (iii) all obligations
of such Person to pay the deferred purchase price of property or services,
except trade accounts payable arising in the ordinary course of business, (iv)
all obligations of such Person as lessee under capital leases, (v) all Debt of
others to the extent secured by a Lien on any asset of such Person, whether or
not such Debt is assumed by such Person, and (vi) all Debt of others to the
extent Guaranteed by such Person.

"DEFAULT" means any condition or event which constitutes an Event of Default or
which with the giving of notice or lapse of time or both would, unless cured or
waived, become an Event of Default.

"DOMESTIC BUSINESS DAY" means any day except a Saturday, Sunday or other day on
which commercial banks in Chicago, Illinois or Houston, Texas are authorized by
law to close.

"DOMESTIC LENDING OFFICE" means, as to each Bank, its office, branch or
affiliate located at its address set forth in its Administrative Questionnaire
(or identified in its Administrative Questionnaire as its Domestic Lending
Office) or such other office, branch or affiliate as such Bank may from time to
time specify to the Agent and the Borrower as its Domestic Lending Office;
provided that any Bank may from time to time by notice to the Borrower and the
Agent designate separate Domestic Lending Offices for its Reference Rate Loans,
on the one hand, and its CD Loans, on the other hand, in which case all
references herein to the Domestic Lending Office of such Bank shall be deemed to
refer to either or both of such offices, as the context may require.

"DOMESTIC LOANS" means CD Loans or Reference Rate Loans or both.

                                       3

 
"DOMESTIC RESERVE PERCENTAGE" has the meaning set forth in Section 2.07(b).

"EFFECTIVE DATE" means the date on which this Agreement becomes effective in
accordance with Section 3.01.

"ENVIRONMENTAL MATTERS" means matters relating to pollution or protection of the
environment, including without limitation emissions, discharges, releases or
threatened releases of pollutants, contaminants or chemicals or industrial,
toxic or hazardous substances or wastes into the environment (including without
limitation ambient air, surface or ground water, land surface or subsurface
strata), or otherwise relating to the manufacture, processing, distribution,
use, treatment, storage, disposal, transport or handling of pollutants,
contaminants or toxic or hazardous substances or wastes.

"ERISA" means the Employee Retirement Income Security Act of 1974, as amended
from time to time, and any successor statute.

"EURO-DOLLAR BUSINESS DAY" means any Domestic Business Day on which commercial
banks are open for international business (including dealings in dollar
deposits) in New York.

"EURO-DOLLAR LENDING OFFICE" means, as to each Bank, its office, branch or
affiliate located at its address set forth in its Administrative Questionnaire
(or identified in its Administrative Questionnaire as its Euro-Dollar Lending
Office) or such other office, branch or affiliate of such Bank as it may from
time to time specify to the Agent and the Borrower as its Euro-Dollar Lending
Office.

"EURO-DOLLAR LOAN" means a Committed Loan to be made by a Bank as a Euro-Dollar
Loan in accordance with the applicable Notice of Borrowing.

"EURO-DOLLAR MARGIN" has the meaning set forth in Section 2.07(c).

"EURO-DOLLAR RESERVE PERCENTAGE" means with respect to any Bank for any day that
percentage (expressed as a decimal) which is in effect on such day, as
prescribed by the Board of Governors of the Federal Reserve System (or any
successor) for determining the reserve requirement (including without limitation
any basic, supplemental or emergency reserves) imposed on such Bank in respect
of "Euro-currency liabilities" (or in respect of any other category of
liabilities which includes deposits by reference to which the interest rate on
Euro-Dollar Loans is determined or in respect of any category of extensions of
credit or other assets which includes loans by a non-United States office of
such Bank to United States residents).

"EVENT OF DEFAULT" has the meaning assigned to that term in Section 6.01.

                                       4

 
"FEDERAL FUNDS RATE" means, for any day, the rate per annum (rounded upwards, if
necessary, to the nearest 1/100th of one percent (1%)) equal to the weighted
average of the rates on overnight Federal funds transactions with members of the
Federal Reserve System arranged by Federal funds brokers on such day, as
published by the Federal Reserve Bank of New York on the Domestic Business Day
next succeeding such day, provided that (i) if such day is not a Domestic
Business Day, the Federal Funds Rate for such day shall be such rate on such
transactions on the next preceding Domestic Business Day as so published on the
next succeeding Domestic Business Day, and (ii) if no such rate is so published
on such next succeeding Domestic Business Day, the Federal Funds Rate for such
day shall be the average rate quoted to Continental Bank National Association on
such day for such transactions as determined by the Agent.

"GRADE 1 PERIOD" means any time during which the sum of the Maximum Drawing
Amount and the Loans is less than 50% of the aggregate amount of the
Commitments.

"GRADE 2 PERIOD" means any time during which the sum of the Maximum Drawing
Amount and the Loans is equal to and greater than 50% of the aggregate amount of
the Commitments and less than the aggregate amount of the Commitments.

"GUARANTEE" means to guarantee or act, directly or indirectly, as a surety for
any Debt or other obligation of any other Person and, without limiting the
generality of the foregoing, to incur or assume any obligation, direct or
indirect, contingent or otherwise, (i) to purchase or pay (or advance or supply
funds for the purchase or payment of) such Debt or other obligation (whether
arising by virtue of partnership arrangements, by agreement to keep-well, to
purchase assets, goods, securities or services, to take-or-pay, or to maintain
financial statement conditions or otherwise) or (ii) entered into for the
purpose of assuring in any other manner the obligee of such Debt or other
obligation of the payment thereof or to protect such obligee against loss in
respect thereof (in whole or in part); provided that the term "Guarantee" shall
not include to endorse for collection or deposit in the ordinary course of
business.

"INTEREST PERIOD" means:

(1)  with respect to each Euro-Dollar Borrowing, the period commencing on the
     date of such Borrowing and ending one or seven (1 or 7) days, or one, two,
     three or six (1, 2, 3 or 6) months thereafter, as the Borrower may elect in
     the applicable Notice of Borrowing; provided that:

     (a)  any Interest Period which would otherwise end on a day which is not a
          Euro-Dollar Business Day shall be extended to the next succeeding
          EuroDollar Business Day unless such Euro-Dollar Business Day falls in
          another

                                       5

 
          calendar month, in which case such Interest Period shall end on the
          next preceding Euro-Dollar Business Day;

     (b)  any Interest Period which begins on the last Euro-Dollar Business Day
          of a calendar month (or on a day for which there is no numerically
          corresponding day in the calendar month at the end of such Interest
          Period) shall, subject to clause (c) below, end on the last Euro-
          Dollar Business Day of a calendar month; and

     (c)  any Interest Period applicable to any Euro-Dollar Loan of any Bank
          which begins before such Bank's Termination Date and would otherwise
          end after such Termination Date shall end on such Termination Date;

(2)  with respect to each CD Borrowing, the period commencing on the date of
     such Borrowing and ending thirty (30), sixty (60), ninety (90) or one
     hundred eighty (180) days thereafter, as the Borrower may elect in the
     applicable Notice of Borrowing; provided that:

     (a)  any Interest Period (other than an Interest Period determined pursuant
          to clause (b) below) which would otherwise end on a day which is not a
          Domestic Business Day shall be extended to the next succeeding
          Domestic Business Day; and

     (b)  any Interest Period applicable to any CD Loan of any Bank which begins
          before such Bank's Termination Date and would otherwise end after such
          Termination Date shall end on such Termination Date;

(3)  with respect to each Base Rate Borrowing, the period commencing on the date
     of such Borrowing and ending 90 days thereafter; provided that:

     (a)  any Interest Period (other than an Interest Period determined pursuant
          to clause (b) below) which would otherwise end on a day which is not a
          Domestic Business Day shall be extended to the next succeeding
          Domestic Business Day; and

     (b)  any Interest Period applicable to any Base Rate Loan of any Bank which
          begins before such Bank's Termination Date and would otherwise end
          after such Termination Date shall end on such Termination Date;

"INTERBANK OFFERED RATE" has the meaning set forth in Section 2.07(c).

"ISSUING BANK" means the Agent, or such other Bank as the Borrower may have
requested and the Required Banks shall have approved, issuing a Letter of
Credit.

                                       6

 
"LETTER OF CREDIT"  See Section 2.03.

"LIEN" means, with respect to any asset, any mortgage, lien, pledge, charge,
security interest or encumbrance of any kind in respect of such asset.  For the
purposes of this Agreement, the Borrower or any Subsidiary shall be deemed to
own subject to a Lien any asset which it has acquired or holds subject to the
interest of a vendor or lessor under any conditional sale agreement, capital
lease or other title retention agreement relating to such asset.

"LOAN" means a Domestic Loan or a Euro-Dollar Loan and "Loans" means Domestic
Loans or Euro-Dollar Loans or any combination of the foregoing.

"LYONDELL" means Lyondell Petrochemical Company.

"LRC" means Lyondell Refining Company.

"MAXIMUM DRAWING AMOUNT" means the maximum aggregate amount from time to time
that the beneficiaries may draw under outstanding Letters of Credit, as such
aggregate amount may be reduced from time to time pursuant to the terms of the
Letters of Credit.

"NOTES" means promissory notes of the Borrower, substantially in the form of
Exhibit A hereto, evidencing the obligation of the Borrower to repay the Loans,
and "Note" means any one of such promissory notes issued hereunder.

"NOTICE OF BORROWING" means a Notice of Committed Borrowing (as defined in
Section 2.02).

"PARENT" means, with respect to any Bank, any Person controlling such Bank.

"PARTICIPANT" has the meaning set forth in Section 9.07(b).

"PBGC" means the Pension Benefit Guaranty Corporation or any entity succeeding
to any or all of its functions under ERISA.

"PERSON" means an individual, a corporation, a partnership, an association, a
trust or any other entity or organization, including a government or political
subdivision or an agency or instrumentality thereof.

"PLAN" means at any time an employee pension benefit plan which is covered by
Title IV of ERISA or subject to the minimum funding standards under Section 412
of the Code and is either (i) maintained by a member of the Controlled Group for
employees of a member of the Controlled Group or (ii) maintained pursuant to a
collective bargaining agreement or any other arrangement under which more than
one employer

                                       7

 
makes contributions and to which a member of the Controlled Group is then
making or accruing an obligation to make contributions or has within the
preceding five (5) plan years made contributions.

"REFERENCE RATE" shall mean the rate of interest then most recently announced by
Continental Bank N.A. in Chicago from time to time as its "reference rate" for
calculating interest on certain loans (which may not be the lowest rate charged
by Continental Bank N.A. at that time): the "Reference Rate" hereunder will
change simultaneously with any change in Continental Bank N.A.'s "reference
rate".

"REFERENCE BANK" means Continental Bank N.A. or its successor.

"REFUNDING BORROWING" means a Committed Borrowing which, after application of
the proceeds thereof, results in no net increase in the outstanding principal
amount of Committed Loans made by any Bank.

"REGULATION D" means Regulation D of the Board of Governors of the Federal
Reserve System, as in effect from time to time (including any successor
provision thereto or any other United States law or regulation imposing reserves
on deposits or loans).

"REGULATION G" shall mean Regulation G of the Board of Governors of the Federal
Reserve System, as in effect from time to time (including any successor
provision thereto).

"REGULATION U" means Regulation U of the Board of Governors of the Federal
Reserve System, as in effect from time to time (including any successor
provision thereto).

"REGULATION X" shall mean Regulation X of the Board of Governors of the Federal
Reserve System, as in effect from time to time (including any successor
provision thereto).

"REQUIRED BANKS" means at any date Banks having at least sixty-six and two-
thirds (66 2/3%) percent of the aggregate amount of the Commitments or, if the
Commitments have been terminated, holding Notes evidencing at least sixty-six
and two-thirds (66 2/3%) percent of the aggregate unpaid principal amount of the
Loans.

"SUBSIDIARY" means any corporation or other entity of which securities or other
ownership interests having ordinary voting power to elect a majority of the
board of directors or other Persons performing similar functions (whether or not
any other class of securities has or might have voting power, by reason of the
happening of a contingency) are at the time owned or controlled directly or
indirectly by the Borrower.

"TERMINATION DATE" means, for each Bank, June 30, 1994, or such later date to
which the Termination Date of such Bank shall have been extended pursuant to
Section

                                       8

 
2.15, or, if such day is not a Euro-Dollar Business Day, the next succeeding
Euro-Dollar Business Day unless such Euro-Dollar Business Day falls in another
calendar month, in which case the Termination Date for such Bank shall be the
next preceding Euro-Dollar Business Day.

"UNFUNDED VESTED LIABILITIES" means, with respect to any Plan at any time, the
amount (if any) by which (i) the present value of all vested nonforfeitable
benefits under such Plan exceeds (ii) the fair market value of all Plan assets
allocable to such benefits, all determined as of the then most recent valuation
date for such Plan, but only to the extent that such excess represents a
potential liability of a member of the Controlled Group to the PBGC or the Plan
under Title IV of ERISA.


SECTION 1.02.  ACCOUNTING TERMS AND DETERMINATIONS.

Unless otherwise specified herein, all accounting terms used herein shall be
interpreted, all accounting determinations hereunder shall be made, and all
financial Statements required to be delivered hereunder shall be prepared in
accordance with generally accepted accounting principles as in effect from time
to time, applied on a basis consistent (except for changes concurred in by the
Borrower's independent public accountants) with the most recent audited
financial statements of the Borrower delivered to the Banks.


SECTION 1.03.  TYPES OF BORROWINGS.

The term "Borrowing" denotes the aggregation of Loans of one or more Banks to be
made to the Borrower pursuant to Article II on a single date and for a single
Interest Period.  Borrowings are classified for purposes of this Agreement
either by reference to the pricing of Loans comprising such Borrowing (e.g., a
"Euro-Dollar Borrowing" is a Borrowing comprised of Euro-Dollar Loans) or by
reference to the provisions of Article II under which participation therein is
determined (i.e., a "Committed Borrowing" is a Borrowing under Section 2.01 in
which all Banks participate in proportion to their Commitments).

                                       9

 
                                   ARTICLE II

                                  THE CREDITS


SECTION 2.01.  COMMITMENTS TO LEND.

Each Bank severally agrees, on the terms and conditions set forth in this
Agreement, to make loans to the Borrower pursuant to this Section 2.01 from time
to time in amounts such that the aggregate principal amount of Committed Loans
by such Bank at any one time outstanding shall not exceed the amount of its
Commitment.  Each Borrowing under this Section 2.01 shall be in an aggregate
principal amount of $5,000,000 or any larger multiple of $1,000,000 (except that
any such Borrowing may be in an aggregate amount such that, immediately after
giving effect to such Borrowing, the aggregate outstanding principal amount of
the Loans will equal the aggregate amount of the Commitments) and shall be made
from the several Banks ratably in proportion to their respective Commitments.
Within the foregoing limits, the Borrower may borrow under this Section 2.01,
repay, or to the extent permitted by Section 2.11, prepay Loans and re-borrow at
any time.


SECTION 2.02.  NOTICE OF COMMITTED BORROWINGS.

The Borrower shall give the Agent notice (a "Notice of Committed Borrowing") not
later than 10:00 A.M. (Chicago time) (9:00 A.M. Chicago time in the event of one
day Euro-Dollar Borrowing) on (x) the date of each Reference Rate Borrowing, (y)
the second Domestic Business Day before each CD Borrowing and (z) the third
Euro-Dollar Business Day before each Euro-Dollar Borrowing, specifying:

(a)  the date of such Borrowing, which shall be a Domestic Business Day in the
     case of a Domestic Borrowing or a Euro-Dollar Business Day in the case of a
     Euro-Dollar Borrowing,

(b)  the aggregate amount of such Borrowing,

(c)  whether the Loans comprising such Borrowing are to be CD Loans, Base Rate
     Loans or EuroDollar Loans, and

(d)  in the case of a CD Borrowing or a Euro-Dollar Borrowing, the requested
     Interest Period; provided, however, that the Borrower shall not be
     permitted to request Euro-Dollar Borrowings with one (1) day Interest
     Period longer than 5 consecutive Domestic Business Days.

                                       10

 
SECTION 2.03.  LETTERS OF CREDIT.

(a)  Subject to the terms and conditions hereof and the execution and delivery
     by the Borrower of a letter of credit application on the Issuing Bank's
     customary form (a "Letter of Credit Application"), each of the Banks, in
     its sole discretion, and the Agent in reliance upon the representations and
     warranties of the Borrower contained in this Agreement, agrees to issue,
     extend and renew between the Effective Date and Termination Date for the
     account of the Borrower one or more standby letters of credit or
     documentary letters of credit (individually, a "Letter of Credit"), in such
     form as may be requested from time to time by the Borrower and agreed to by
     such Bank; provided, however, that, after giving effect to such request the
     sum of (A) the aggregate Maximum Drawing Amount of all Letters of Credit
     and (B) the amount of all Loans outstanding shall not exceed the aggregate
     amount of the Commitments.

(b)  Each new Letter of Credit Application shall be completed to the
     satisfaction of the Issuing Bank.  In the event that any provision of any
     Letter of Credit Application shall be inconsistent with any provision of
     this Agreement, then the provisions of this Agreement shall, to the extent
     of any such inconsistency, govern.

(c)  Each Letter of Credit issued, extended or renewed hereunder shall, among
     other things, (i) provide for the payment of sight drafts for honor
     thereunder when presented in accordance with the terms thereof and when
     accompanied by the documents described therein, and (ii) have an expiry
     date no later than fourteen (14) days or, if the beneficiary is located
     outside of the United States, forty-five (45) days prior to the Termination
     Date.  Each Letter of Credit so issued, extended or renewed shall be
     subject to the Uniform Customs and Practice for Documentary Credits (1983
     Revision), International Chamber of Commerce Publication No. 400 or any
     successor version thereto.

(d)  Upon the reduction of the total Commitments to an amount less than the
     maximum Drawing Amount, the Borrower shall immediately pay to the Agent an
     amount equal to such difference.

(e)  The amount of each drawing under any Letter of Credit issued by an Issuing
     Bank pursuant to this Agreement shall be deemed to be a Loan made by the
     Banks to the Borrower on the date of such drawing and shall be funded by
     the Banks in accordance with Sections 2.02 and 2.04.

(f)  Each Bank (other than the Issuing Bank) and the Borrower hereby acknowledge
     that each Letter of Credit issued by the Issuing Bank pursuant to this
     Agreement is issued by the Issuing Bank on behalf of all of the Banks.
     Each Bank absolutely and irrevocably agrees, regardless of the existence or

                                       11

 
     continuance of an Event of Default or any other condition whatsoever, to
     reimburse the Issuing Bank in an amount equal to such Bank's Commitment
     Percentage of each drawing under any Letter of Credit made in accordance
     with paragraph (e) above and to be responsible for its Commitment
     Percentage of all liabilities incurred by the Issuing Bank in respect of
     each Letter of Credit opened or extended by the Issuing Bank for the
     account of the Borrower pursuant to this Agreement.  The obligations of the
     Banks hereunder are several and the failure of any Bank to fulfill its
     obligations shall not result in any Bank becoming obligated to advance more
     than its Commitment percentage of the Loans hereunder.

(g)  The Issuing Bank, upon receipt of any draft drawn under a Letter of Credit,
     shall promptly examine such draft and any accompanying certificate or other
     document in accordance with its customary procedures for conformity to the
     requirements of such Letter of Credit.  In the event the Issuing Bank
     determines to pay such draft in accordance with the foregoing, the Issuing
     Bank shall promptly notify the Banks and the Agent and each Bank shall, as
     contemplated by paragraph (f) of this Section 2.03, provide to the Agent
     for the account of the Issuing Bank in funds immediately available to the
     Issuing Bank, such Bank's Commitment Percentage of the funds necessary to
     pay such draft.

(h)  The Borrower's obligations under this Section 2.03 to repay Loans in
     respect of drawings under the Letters of Credit as provided hereunder shall
     rank pari passu with the obligations of the Borrower to repay all other
     Loans, shall be absolute and unconditional under any and all circumstances
     and irrespective of the occurrence of any Event of Default or any condition
     precedent whatsoever or any setoff, counterclaim or defense to payment
     which the Borrower may have or have had against the Agent, the Issuing
     Bank, any other Bank or any beneficiary of a Letter of Credit.  The
     Borrower further agrees with the Agent and the Banks that the Agent and the
     Banks shall not be responsible for, among other things, the validity or
     genuineness of documents or of any endorsements thereon, even if such
     documents should in fact prove to be in any or all respects invalid,
     fraudulent or forged, or any dispute between or among the Borrower, the
     beneficiary of any Letter of Credit or any financial institution or other
     party to which any Letter of Credit may be transferred or any claims or
     defenses whatsoever of the Borrower against the beneficiary of any Letter
     of Credit of any such transferee.  The Agent and the Banks shall not be
     liable for any error, omission, interruption or delay in transmission,
     dispatch or delivery or any message or advice, however transmitted, in
     connection with any Letter of Credit absent the Agent's and the Banks'
     gross negligence and willful misconduct.  The Borrower agrees that any
     action taken or omitted by the Agent or any Issuing Bank under or in
     connection with each Letter of Credit and the related drafts and documents,
     absent the Agent's and the Banks' gross negligence and willful misconduct,
     shall be binding upon the Borrower and shall

                                       12

 
     not result in any liability on the part of the Agent or any Issuing Bank to
     the Borrower.

(i)  To the extent not inconsistent with paragraph (h) above, the Issuing Bank
     shall be entitled to rely, and shall be fully protected in relying upon,
     any Letter of Credit, draft, writing, resolution, notice, consent
     certificate, affidavit, letter, cablegram, telegram, facsimile, telex or
     teletype message, statement, order or other document believed by it to be
     genuine and correct and to have been signed, sent or made by the proper
     Person or Persons and upon advice and statements of legal counsel,
     independent accountants and other experts selected by the Issuing Bank.
     The Issuing Bank shall be fully indemnified by the Banks (exclusive of the
     Issuing Bank's pro rata share of such indemnification obligation) against
     any and all liability and expense (including any expense for which the
     Issuing Bank has not been reimbursed by the Borrower as required by Section
     9.04) which may be incurred by it by reason of taking or failing to take
     any action absent the Issuing Bank's gross negligence or willful
     misconduct.  The Issuing Bank shall in all cases be fully protected in
     acting, or in refraining from acting, under this Agreement in accordance
     with a request of the Required Banks, and such request and any action taken
     or failure to act pursuant thereto shall be binding upon the Banks.

(j)  The Borrower shall, on the date of issuance or any extension or renewal of
     any Letters of Credit and at such other time or times as such charges are
     customarily made by the Issuing Bank, pay an upfront fee (in each case, a
     "Letters of Credit Fee") to the Agent in respect of each Letter of Credit
     so issued equal to 0.25% per annum for commercial letters of credit and
     0.375% per annum during any Grade 1 Period (.625% per annum for any Grade 2
     Period for the face amount of such Letters of Credit in excess of 50% of
     the aggregate amount of Commitment) for standby Letters of Credit of the
     face amount of such Letter of Credit, plus the Issuing Bank's issuance,
     amendment and other administrative fees and charges customarily charged to
     its customers similarly situated.  Such Letter of Credit Fee (but not such
     customary issuance, amendment fee or other administrative fees and charges
     which shall be solely for the account of the Issuing bank) shall be for the
     accounts of the Banks in accordance with their respective Commitment
     Percentages.  Such upfront fees shall be based on a 360 day year.

(k)  Upon the occurrence of an Event of Default, the Borrower shall pay to the
     Agent on demand an amount equal to the Maximum Drawing Amount on all
     Letters of Credit, which amount shall be held in an interest bearing
     account by the Agent for the benefit of all the Banks and the Agent as cash
     collateral for all obligations related to such Letters of Credit.

                                       13

 
SECTION 2.04.  NOTICE TO BANKS; FUNDING OF LOANS.

(a)  Upon receipt of a Notice of Borrowing, the Agent shall promptly notify each
     Bank of the contents thereof and of such Bank's share (if any) of such
     Borrowing and such Notice of Borrowing shall not thereafter be revocable by
     the Borrower.

(b)  Not later than 2:00 P.M. (Chicago time) on the date of each Borrowing, each
     Bank participating therein shall (except as provided in subsection (c) of
     this Section) make available its share of such Borrowing, in Federal or
     other funds immediately available in Chicago to the Agent at its address
     specified in or pursuant to Section 9.01. Unless the Agent determines that
     any applicable condition specified in Article III has not been satisfied,
     the Agent will make the funds so received from the Banks available to the
     Borrower at an account to be designated by Borrower.

(c)  Unless the Agent shall have received notice from a Bank prior to the date
     of any Borrowing that such Bank will not make available to the Agent such
     Bank's share of such Borrowing, the Agent may assume that such Bank has
     made such share available to the Agent on the date of such Borrowing in
     accordance with subsections (b) and (c) of this Section 2.04 and the Agent
     may, in reliance upon such assumption, make available to the Borrower on
     such date a corresponding amount.  If and to the extent that such Bank
     shall not have so made such share available to the Agent, such Bank and the
     Borrower severally agree to repay to the Agent forthwith on demand such
     corresponding amount together with interest thereon, for each day from the
     date such amount is made available to the Borrower until the date such
     amount is repaid to the Agent, at (i) in the case of the Borrower, a rate
     per annum equal to the higher of the Federal Funds Rate and the interest
     rate applicable thereto pursuant to Section 2.07 and (ii) in the case of
     such Bank, the Federal Funds Rate.  If such Bank shall repay to the Agent
     such corresponding amount, such amount so repaid shall constitute such
     Bank's Loan included in such Borrowing for purposes of this Agreement.  In
     no event shall any payment by the Agent, or repayment by the Borrower, of
     any amount pursuant to this subsection (d) relieve the Bank that failed to
     make available its share of the related Borrowing of its obligations
     hereunder.


SECTION 2.05.  NOTES.

(a)  The Loans of each Bank shall be evidenced by a single Note payable to the
     order of such Bank for the account of its Applicable Lending Office in an
     amount equal to the aggregate unpaid principal amount of such Bank's Loans.

                                       14

 
(b)  Upon receipt of each Bank's Note pursuant to Section 3.01(vi), the Agent
     shall mail such Note to such Bank.  Each Bank shall record the date, amount
     and maturity of each Loan made by it and the date and amount of each
     payment of principal made by the Borrower with respect thereto, and prior
     to any transfer of its Note shall endorse on the schedule forming a part
     thereof appropriate notations to evidence the foregoing information with
     respect to each such Loan then outstanding; provided that the failure of
     any Bank to make any such recordation or endorsement shall not affect the
     obligations of the Borrower hereunder or under the Notes.  Each Bank is
     hereby irrevocably authorized by the Borrower so to endorse its Note and to
     attach to and make a part of its Note a continuation of any such schedule
     as and when required.


SECTION 2.06.  MATURITY OF LOANS.

Each Loan included in any Borrowing shall mature, and the principal amount
thereof shall be due and payable, on the last day of the Interest Period
applicable to such Borrowing.


SECTION 2.07.  INTEREST RATES.

(a)  Each Base Rate Loan shall bear interest on the outstanding principal amount
     thereof, for each day from the date such Loan is made until it becomes due,
     at a rate per annum equal to the Base Rate for such day.  Such interest
     shall be payable for each Interest Period on the last day thereof.  Any
     overdue principal of and, to the extent permitted by law, overdue interest
     on any Reference Rate Loan shall bear interest, payable on demand, for each
     day until paid at a rate (the "Default Rate") per annum equal to 2% above
     the Reference Rate.

(b)  Each CD Loan shall bear interest on the outstanding principal amount
     thereof, for the Interest Period applicable thereto, at a rate per annum
     equal to the sum of the CD Margin (as in effect on the first day of such-
     Interest Period) plus the applicable Adjusted CD Rate.  Such interest shall
     be payable for each Interest Period on the last day thereof and if such
     Interest Period is longer than 90 days, at intervals of 90 days after the
     first day thereof.  Any overdue principal of and, to the extent permitted
     by law, overdue interest on any CD Loan shall bear interest, payable on
     demand, for each day until paid at a rate per annum equal to the Default
     Rate.

     "CD MARGIN" means 0.5% per annum during any Grade 1 Period and 0.75% per
     annum during any Grade 2 Period, provided, however, that such increased
     rate is applicable only on the incremental borrowings.

                                       15

 
     The "ADJUSTED CD RATE" means for any Interest Period for any CD Loan, an
     interest rate per annum equal at all times during such Interest Period to
     the sum of:

               (1) the rate per annum obtained by dividing (x) the rate of
          interest determined by the Reference Bank to be the average (rounded
          upward, if necessary, to the nearest whole multiple of 1/16 of 1% per
          annum) of the bid rates per annum quoted to the Reference Bank in the
          secondary market at approximately 10:00 A.M. (Chicago, Illinois time),
          or as soon thereafter as practicable, on the first day of such
          Interest Period, by two Chicago certificate of deposit dealers of
          recognized standing selected by the Reference Bank for the purchase at
          face value of certificates of deposit issued by the Reference Bank in
          an amount approximately equal or comparable to such Loan and with a
          maturity approximately equal to such Interest Period, by (y) a
          percentage equal to 100% minus the Domestic Reserve Percentage (as
          defined below) for such Interest Period,

     plus

               (2) the CD Assessment Rate (as defined below) for such Interest
          Period.

     The "CD BASE RATE" applicable to any Interest Period is the rate of
     interest determined by the Agent to be the average (rounded upward, if
     necessary, to the next higher 1/100 of one percent (1%)) of the prevailing
     rates per annum bid at 10:00 A.M. (Chicago time) (or as soon thereafter as
     practicable) on the first day of such Interest Period by two or more
     Chicago certificate of deposit dealers of recognized standing for the
     purchase at face value from  the Reference Bank of its certificates of
     deposit in an amount comparable to the unpaid principal amount of the CD
     Loan of the Reference Bank to which such Interest Period applies and having
     a maturity comparable to such Interest Period.

     "DOMESTIC RESERVE PERCENTAGE" means for any day that percentage (expressed
     as a decimal) which is in effect on such day, as prescribed by the Board of
     Governors of the Federal Reserve System (or any successor) for determining
     the maximum reserve requirement (including without limitation any basic,
     supplemental or emergency reserves) for a member bank of the Federal
     Reserve System in Chicago, Illinois with deposits exceeding five billion
     dollars in respect of new non-personal time deposits in dollars in Chicago,
     Illinois having a maturity comparable to the related Interest Period and in
     an amount of $100,000 or more.  The Adjusted CD Rate shall be adjusted
     automatically on and as of the effective date of any change in the Domestic
     Reserve Percentage.

                                       16

 
     "CD ASSESSMENT RATE" means for any Interest Period the net annual
     assessment rate (rounded upwards, if necessary, to the next higher 1/100 of
     one percent (1%)) actually incurred by Continental Bank N.A. to the Federal
     Deposit Insurance Corporation (or any successor) for such Corporation's (or
     such successor's) insuring time deposits at offices of Continental Bank
     N.A. in the United States during the most recent period for which such rate
     has been determined prior to the commencement of such Interest Period.

(c)  Each Euro-Dollar Loan shall bear interest on the outstanding principal
     amount thereof, for the Interest Period applicable thereto, at a rate per
     annum equal to the sum of the Euro-Dollar Margin (as in effect on the first
     day of such Interest Period) plus the applicable Interbank Offered Rate.
     Such interest shall be payable for each Interest Period on the last day
     thereof and, if such Interest Period is longer than three (3) months, at
     intervals of three (3) months after the first day thereof.

     "EURO-DOLLAR MARGIN" means 0.375% per annum during any Grade 1 Period and
     0.625% per annum during any Grade 2 Period, provided however, that such
     increased rate is applicable only on the incremental borrowings.

     The "INTERBANK OFFERED RATE" applicable to any Interest Period means the
     average (rounded upward, if necessary, to the next higher 1/16 of one
     percent (1%)) of the respective rates per annum at which deposits in
     dollars are offered by prime banks to the Reference Bank in the interbank
     Eurodollar market at approximately 10:00 A.M. (Chicago time) two Euro-
     Dollar Business Days before the first day of such Interest Period in an
     amount approximately equal to the principal amount of the Euro-Dollar Loan
     of the Reference Bank to which such Interest Period is to apply and for a
     period of time comparable to such Interest Period.

(d)  Any overdue principal of and, to the extent permitted by law, overdue
     interest on any Euro-Dollar Loan shall bear interest, payable on demand,
     for each day from and including the date payment thereof was due to but
     excluding the date of actual payment, at a rate per annum equal to the sum
     of one percent (1%) plus the average (rounded upward, if necessary, to the
     next higher 1/16 of one percent (1%)) of the respective rates per annum at
     which one day (or, if such amount due remains unpaid more than three (3)
     Euro-Dollar Business Days, then for such other period of time not longer
     than three (3) months as the Agent may select) deposits in dollars in an
     amount approximately equal to such overdue payment due to the Reference
     Bank are offered to the Reference Bank in the interbank Eurodollar market
     for the applicable period determined as provided above (or, if the
     circumstances described in clause (a) or (b) of Section 8.01 shall exist,
     at a rate per annum equal to the sum of one percent (1%) plus the rate
     applicable to Base Rate Loans for such day).

                                       17

 
(e)  The Agent shall determine each interest rate applicable to the Loans
     hereunder.  The Agent shall give prompt notice to the Borrower and the
     participating Banks by fax or cable of each rate of interest so determined,
     and its determination thereof shall be conclusive in the absence of
     manifest error.

SECTION 2.08.  FEES.

(a)  Commitment Fee.

     The Borrower shall pay to the Agent for the account of the Banks ratably in
     proportion to their Commitments a commitment fee at the rate of 0.15%  per
     annum on the daily average amount by which the aggregate amount of the
     Commitments exceeds the aggregate outstanding principal amount of the
     Loans.  Such commitment fee shall accrue for the account of each Bank and
     including the Effective Date to but excluding the Termination Date of such
     Bank.

(b)  Participation Fee.

     Upon the execution and delivery hereof, the Borrower shall pay to the Agent
     for the account of each Bank a one time participation fee at the rate of
     0.06% of such Bank's commitment.

(c)  Payments.

     Accrued fees under this Section for the account of any Bank shall be
     payable quarterly in arrears on each September 30, December 31, March 31
     and June 30 and upon the date of termination of such Bank's Commitments in
     their entirety (and, if later, the date the Loans of such Bank shall be
     repaid in their entirety).



SECTION 2.09.  OPTIONAL TERMINATION OR REDUCTION OF COMMITMENTS.

The Borrower may, upon at least three Domestic Business Day's notice to the
Agent, (i) terminate the Commitments at any time, if no Loans are outstanding at
such time or (ii) ratably reduce from time to time by an aggregate amount of
$10,000,000 or any larger multiple of $1,000,000, the aggregate amount of the
Commitments in excess of the aggregate outstanding principal amount of the
Loans.

                                       18

 
SECTION 2.10.  MANDATORY TERMINATION OF COMMITMENTS.

(a)  The Commitment of each Bank shall terminate on the Termination Date of such
     Bank, and any Loans of such Bank then outstanding (together with accrued
     interest thereon) shall be due and payable on such date.


SECTION 2.11.  OPTIONAL PREPAYMENTS.

(a)  The Borrower may, upon at least one Domestic Business Day's notice to the
     Agent, prepay any Reference Rate Borrowing or, upon at least two Domestic
     Business Days notice to the Agent, prepay any CD Borrowing or, upon at
     least three (3) Euro-Dollar Business Days' notice to the Agent, prepay any
     Euro-Dollar Borrowing in whole at any time, or from time to time in part in
     amounts aggregating $5,000,000 or any larger multiple of $1,000,000, by
     paying the principal amount to be prepaid together with accrued interest
     thereon to but excluding the date of prepayment. Each such optional
     prepayment shall be applied to prepay ratably the Loans of the several
     Banks included in such Borrowing.

(b)  Upon receipt of a notice of prepayment pursuant to this Section, the Agent
     shall promptly notify each Bank of the contents thereof and of such Bank's
     ratable share (if any) of such prepayment and such notice shall not
     thereafter be revocable by the Borrower.


SECTION 2.12.  GENERAL PROVISIONS AS TO PAYMENTS.

(a)  The Borrower shall make each payment of principal of, and interest on, the
     Loans and of fees hereunder, not later than 12:00 Noon (Chicago time) on
     the date when due, in Federal or other funds immediately available in
     Chicago, to the Agent at its address referred to in Section 9.01.  The
     Agent will promptly distribute to each Bank its ratable share, if any, of
     each such payment received by the Agent for the account of the Banks.
     Whenever any payment of principal of, or interest on, the Domestic Loans or
     of fees shall be due on a day which is not a Domestic Business Day, the
     date for payment thereof shall be extended to the next succeeding Domestic
     Business Day.  Whenever any payment of principal of, or interest on, the
     Euro-Dollar Loans shall be due on a day which is not a Euro-Dollar
     Business Day, the date for payment thereof shall be extended to the next
     succeeding Euro-Dollar Business Day unless such Euro-Dollar Business Day
     falls in another calendar month, in which case the date for payment thereof
     shall be the next preceding Euro-Dollar Business Day.  If the date for any
     payment of principal is extended by operation of law or otherwise, interest
     thereon shall be payable for such extended time.

                                       19

 
(b)  Unless the Agent shall have received notice from the Borrower prior to the
     date on which any payment is due to the Banks hereunder that the Borrower
     will not make such payment in full, the Agent may assume that the Borrower
     has made such payment in full to the Agent on such date and the Agent may,
     in reliance upon such assumption, cause to be distributed to each Bank on
     such due date an amount equal to the amount then due such Bank.  If and to
     the extent that the Borrower shall not have so made such payment, each Bank
     shall repay to the Agent forthwith on demand such amount distributed to
     such Bank together with interest thereon, for each day from the date such
     amount is distributed to such Bank until the date such Bank repays such
     amount to the Agent, at the Federal Funds Rate.


SECTION 2.13.  COMPUTATION OF INTEREST AND FEES.

All interest and fees shall be computed on the basis of a year of three hundred
sixty (360) days and paid for the actual number of days elapsed (including the
first day but excluding the last day).


SECTION 2.14.  MAXIMUM INTEREST RATE.

(a)  It is the intention of the parties hereto to comply strictly with all
     applicable usury laws regarding the contracting for, and the charging,
     payment and receipt of, interest (which shall, for purposes of this Section
     2.15, be deemed to include, without limitation, any compensation received
     by any Bank for the use, forbearance or detention (as such terms are used
     in Tex. Rev. Civ. Stat. Ann. Art. 5069-1.01(a)) of the indebtedness
     incurred under this Agreement and evidenced by the Notes) whether such laws
     are now or hereafter in effect, including the laws of the United States of
     America or any other jurisdiction whose laws are applicable, and including
     any subsequent revisions to or judicial interpretations of those laws, in
     each case to the extent they are applicable to this Agreement and the Notes
     (the "Applicable Usury Laws").

(b)  If any payment by the Borrower to any Bank hereunder (including any payment
     upon acceleration of the maturity of any Notes of such Bank) results or
     would result in the Borrower paying to any Bank any interest in excess of
     the Maximum Amount, as defined in subsection (e) below, or if any
     transaction contemplated by or any provision of this Agreement, such Bank's
     Note or Notes or any other agreement or instrument (collectively, such
     Bank's "Loan Documents") would otherwise be usurious under any Applicable
     Usury Laws, then, notwithstanding anything to the contrary in such Bank's
     Loan Documents, the Borrower and such Bank agree as follows:

                                       20

 
     (i)   the provisions of this Section 2.14 shall govern and control;

     (ii)  the aggregate amount of all interest that is contracted for, charged
           or received pursuant to such Bank's Loan Documents or otherwise shall
           under no circumstances exceed the Maximum Amount;

     (iii) neither the Borrower nor any other Person shall be obligated to pay
           the amount of such interest to the extent that it would exceed the
           Maximum Amount; and

     (iv)  the provisions of such Bank's Loan Documents immediately shall be
           deemed reformed, without the necessity of the execution of any new
           document or instrument, so as to comply with all Applicable Usury
           Laws.

(c)  If any payment by the Borrower under any Bank's Loan Documents (including
     any payment upon acceleration of the maturity of any Note) results in the
     Borrower actually having paid to such Bank any interest in excess of the
     Maximum Amount, then such excess amount shall be applied to the reduction
     of the principal balance of such Bank's Loans or to other amounts (other
     than interest) payable hereunder, and if no such principal is then
     outstanding, and no such other amount is then payable, such excess or part
     thereof remaining, shall be repaid to the Borrower.

(d)  All interest paid, or agreed to be paid, pursuant to any Bank's Loan
     Documents shall, to the fullest extent permitted by Applicable Usury Laws,
     be amortized, prorated, allocated and spread throughout the full term of
     any indebtedness incurred under or evidenced by such Bank's Loan Documents
     so that the rate of interest paid under such Bank's Loan Documents does
     not exceed the Highest Lawful Rate in effect at any particular time during
     the full term thereof.

(e)  As used herein, the term "Maximum Amount" means, with respect to any Bank,
     the maximum nonusurious amount of interest that may be lawfully contracted
     for, charged or received by such Bank in connection with the indebtedness
     incurred under or evidenced by such Bank's Loan Documents under all
     Applicable Usury Laws, and the term "Highest Lawful Rate" means, with
     respect to any Bank, the maximum rate of interest, if any, that may be
     charged the Borrower under all Applicable Usury Laws on the principal
     balance of the indebtedness incurred under or evidenced by such Bank's Loan
     Documents from time to time outstanding.

(f)  In the event that the rate of interest set forth in Section 2.07 on any
     Loan of any Bank (the "Stated Rate"), together with any fees or other
     amounts payable to such Bank deemed to constitute interest under Applicable
     Usury Laws ("Additional Interest"), exceeds the Highest Lawful Rate, then
     the amount of

                                       21

 
     interest payable to such Bank to accrue pursuant to such Bank's Loan
     Documents shall be limited, notwithstanding anything to the contrary in
     such Bank's Loan Documents, to the amount of interest that would accrue at
     the Highest Lawful Rate; provided that, to the fullest extent permitted by
     Applicable Usury Laws, any subsequent reductions in the Stated Rate shall
     not reduce the interest payable to such Bank to accrue pursuant to such
     Bank's Loan Documents below the Highest Lawful Rate until the aggregate
     amount of interest payable to such Bank actually accrued pursuant to such
     Bank's Loan Documents, together with all Additional Interest payable to
     such Bank, equals the amount of interest which would have accrued if the
     Stated Rate had at all times been in effect and such Additional Interest,
     if any, had been paid in full.

(g)  In the event that, at maturity or upon payment in full of all amounts
     payable under any Bank's Loan Documents, the total amount of interest paid
     to any Bank or payable to such Bank and accrued under the terms of or
     evidenced by such Bank's Loan Documents is less than the total amount of
     interest which would have been paid to such Bank or accrued on the
     indebtedness incurred under or evidenced by such Bank's Loan Documents if
     the Stated Rate had, at all times, been in effect and all Additional
     Interest had been paid in full, then the Borrower shall, to the extent
     permitted by Applicable Usury Laws, pay to the Agent for the account of
     such Bank an amount equal to the difference between (a) the lesser of (i)
     the amount of interest payable to such Bank which would have accrued if the
     Highest Lawful Rate for such Bank had at all times been in effect or (ii)
     the amount of interest which would have accrued on the indebtedness
     incurred under or evidenced by such Bank's Loan Documents if the Stated
     Rate had at all times been in effect and all Additional Interest had been
     paid in full and (b) the amount of interest actually paid to such Bank or
     payable to such Bank and accrued under or evidenced by such Bank's Loan
     Documents.


SECTION 2.15.  EXTENSION OF TERMINATION DATE.

(a)  The Termination Date of each Bank may be extended, in the manner set forth
     in this Section 2.15, on June 30, 1994 and on the day following such date
     (an "Extension Date") for a period of 364 days after the date on which such
     Termination Date would otherwise have occurred.  If the Borrower wishes to
     request an extension of the Termination Date of the Banks on any Extension
     Date it shall give notice to that effect to the Agent not less than forty-
     five (45) nor more than sixty (60) days prior to such Extension Date,
     whereupon the Agent shall promptly notify each of the Banks of such
     request.

(b)  Each Bank which desires to extend its Termination Date as requested by the
     Borrower may, at its option, so elect by notice to the Borrower and the
     Agent

                                       22

 
     within fifteen (15) days after receipt of such notice.  Such notice shall
     be irrevocable.  Any Bank which does not give such notice to the Borrower
     and the Agent shall be deemed to have elected not to extend its Termination
     Date as requested, and such Bank's Commitment shall terminate in accordance
     with Section 2.10 on its then Termination Date.

(c)  The Borrower shall have the right, with the assistance of the Agent, to
     seek a mutually satisfactory substitute bank or banks (which may be one or
     more of the Banks) to purchase the Note at par and assume the Commitment of
     any Bank electing not to extend its Termination Date, all in accordance
     with Section 9.07(c).


SECTION 2.16.  WITHHOLDING TAX EXEMPTION.

At least five (5) Domestic Business Days prior to the first date on which
interest or fees are payable hereunder for the account of any Bank, each Bank
that is not incorporated under the laws of the United States of America or a
state thereof agrees that it will deliver to each of the Borrower and the Agent
two duly completed copies of United States Internal Revenue Service Form 1001 or
4224, certifying in either case that such Bank is entitled to receive payments
under this Agreement and the Notes without deduction or withholding of any
United States federal income taxes.  Each Bank which so delivers a Form 1001 or
4224 further undertakes to deliver to each of the Borrower and the Agent two
additional copies of such form (or a successor form) on or before the date that
such form expires or becomes obsolete or after the occurrence of any event
requiring a change in the most recent form so delivered by it, and such
amendments thereto or extensions or renewals thereof as may be reasonably
requested by the Borrower or the Agent, in each case certifying that such Bank
is entitled to receive payments under this Agreement and the Notes without
deduction or withholding of any United States federal income taxes, unless an
event (including without limitation any change in treaty, law or regulation) has
occurred prior to the date on which any such delivery would otherwise be
required which renders all such forms inapplicable or which would prevent such
Bank from duly completing and delivering any such form with respect to it and
such Bank advises the Borrower and the Agent that it is not capable of receiving
payments without any deduction or withholding of United States federal income
tax.  If any Bank notifies the Borrower that it is not capable of receiving
payments without any deduction or withholding of United States federal income
tax, the Borrower shall commence making any deductions and withholding any
amounts with respect to payments for the account of such Bank that are required
by applicable law.

                                       23

 
                                  ARTICLE III

                                   CONDITIONS

SECTION 3.01.  EFFECTIVENESS.

This Agreement shall become effective on the date that each of the following
conditions shall have been satisfied (or waived in accordance with Section
9.05):

     (i)   receipt by the Agent of certified copies of the Certificate of
           Organization and Regulations of the Borrower and the resolutions of
           the Owners Committee of the Borrower authorizing the transactions
           contemplated hereby and such other documents as the Agent or the
           Required Banks may reasonably request relating to the existence of
           the Borrower, the corporate authority for and the validity of this
           Agreement and the Notes, and any other matters relevant hereto, all
           in form and substance satisfactory to the Agent;

     (ii)  receipt by the Agent of a Certificate of Incumbency dated the
           Effective Date executed by the Secretary or an Assistant Secretary of
           the Borrower in substantially the form of Exhibit E hereto setting
           forth the name, title and specimen signature of each Authorized
           Officer or Authorized Representative of the Borrower (l) who has
           signed this Agreement on behalf of the Borrower, (2) who will sign
           the Notes on behalf of the Borrower or (3) who will, until replaced
           by another officer or representative duly authorized for that
           purpose, act as the representative of the Borrower for the purposes
           of signing documents and giving notices and other communications by
           the Borrower in connection with this Agreement and the transactions
           contemplated hereby;

     (iii) receipt by the Agent of counterparts hereof signed by each of the
           parties hereto (or, in the case of any party as to which an executed
           counterpart shall not have been received, receipt by the Agent in
           form satisfactory to it of telegraphic, telex or other written
           confirmation from such party of execution of a counterpart hereof by
           such party);

     (iv)  receipt by the Agent of an opinion of the General Counsel of the
           Borrower in substantially the form of Exhibit F hereto and covering
           such additional matters relating to the transactions contemplated
           hereby as the Required Banks may reasonably request;

     (v)   receipt by the Agent of a certificate signed by the Chief Executive
           Officer or Controller of the Borrower dated the Effective Date to the
           effect set forth in clauses (iii) and (iv) of Section 3.02; and

                                       24

 
     (vi)  receipt by the Agent for the account of each Bank of a duly executed
           Note dated on or before the Effective Date, complying with the
           provisions of Section 2.05.

provided that this Agreement shall not become effective or be binding on any
party hereto unless all of the foregoing conditions are satisfied not later
than    July 1    , 1993.  The Agent shall promptly notify the Borrower and the
Banks of the Effective Date, and such notice shall be conclusive and binding on
all parties hereto.


SECTION 3.02.  BORROWINGS.

The obligation of any Bank to make a Loan, including, without limitation, a
Letter of Credit, on the occasion of any Borrowing hereunder is subject to the
satisfaction of the following conditions:

     (i)   receipt by the Agent of a Notice of Borrowing as required by Section
           2.02;

     (ii)  the fact that, immediately after such Borrowing, the aggregate
           outstanding principal amount of the Loans will not exceed the
           aggregate amount of the Commitments.  For purposes of calculating the
           available amount of a Loan as at any date, all Loans requested but
           not yet advanced and the aggregate face amount of all Letters of
           Credit requested but not yet issued will be treated as advanced
           unless the Borrower has directed that the requested advance be
           disbursed to repay the Loans;

     (iii) the fact that, immediately after such Borrowing, no Default shall
           have occurred and be continuing;

     (iv)  the fact that the representations and warranties of the Borrower
           contained in this Agreement shall be true on and as of the date of
           such Borrowing as if made on and as of such date (except in the case
           of a Refunding Borrowing, the representations and warranties set
           forth in clauses (c) and (d) of Section 4.01 as to any material-
           adverse change or litigation which has theretofore been disclosed in
           writing by the Borrower to the Banks);

Each Borrowing hereunder shall  be deemed to be a  representation and warranty
by the Borrower on the date of such Borrowing as to the facts specified in
clauses (ii),  (iii) and (iv) of this Section.

                                       25

 
                                 ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES


SECTION 4.01.  REPRESENTATIONS AND WARRANTIES OF THE BORROWER.

The Borrower represents and warrants to the Banks as follows:

(a)  (1)  The Borrower is

          (i)  a limited liability company duly organized, validly existing and
               in good standing under the laws of the State of Texas and

          (ii) The Borrower is registered, qualified or licensed (or has applied
               for such registration, qualification or licensing) to do business
               and in good standing in each of the jurisdictions within the
               United States where ownership of its properties or the conduct of
               its business requires such registration, qualification or
               licensing and which currently permit registration, qualification
               or licensing of limited liability companies and has or will apply
               for registration, qualification or licensing to do business in
               each other jurisdiction within the United States where the
               ownership of its properties or the conduct of its business
               requires such registration, qualification or licensing as soon as
               such jurisdiction permits registration, qualification of or
               licensing for limited liability companies, except in all cases
               where the failure to be so registered, qualified or licensed
               would not have a material adverse effect on the business,
               operations, affairs, assets, condition (financial or otherwise)
               or results of operation of the Borrower considered as a whole.

     (2)  The Borrower has all power and authority, governmental permits,
          licenses, consents, authorizations, orders and approvals and other
          authorizations as are necessary to carry on its business substantially
          as presently conducted except for such governmental permits, licenses,
          consents, authorizations, orders and approvals and other
          authorizations as are held by Lyondell or any of Lyondell's
          subsidiaries or predecessors in interest, are non-transferable in
          accordance with their respective terms or require the consent of third
          parties (including governmental entities) to their transfer and as to
          which the Borrower and Lyondell believe that such third-party consents
          can be obtained or substitute permits, licenses, consents,
          authorizations, orders and approvals may be obtained by the Borrower
          in due course and without materially affecting the ability of the
          Borrower to carry on its business substantially as presently
          conducted in

                                       26

 
          the meantime.  The Borrower is diligently seeking to obtain such
          third-party consents and such substitute permits, licenses, consents,
          authorizations, orders and approvals.

     (3)  The execution, delivery and performance by the Borrower of this
          Agreement and of the Notes, and Borrowings hereunder, are within its
          power and authority and have been duly authorized by all necessary
          proceedings.

     (4)  Neither such authorization nor the execution, delivery and performance
          by the Borrower of this Agreement or of the Notes, nor any Borrowing
          hereunder when made, will conflict with, result in a breach of or
          constitute a default under any of the terms, conditions or provisions
          of any law or any regulation, order, writ, injunction or decree of any
          court or governmental authority or of the Certificate of Organization
          or Regulations of the Borrower or result in the violation or
          contravention of, or the acceleration of any obligation under, or
          cause the creation of any Lien on any of the assets of the Borrower
          pursuant to the provisions of, any indenture, agreement or other
          instrument to which it is a party or by which it is bound.

     (5)  Assuming its due execution by the Banks and the Agent, this Agreement
          constitutes a legal, valid and binding agreement of the Borrower and
          the Notes, when duly executed on behalf of the Borrower and delivered
          in accordance with this Agreement, will constitute legal, valid and
          binding obligations of the Borrower.

(b)  The pro forma balance sheet of the Borrower as of March 31, 1993 a copy of
     which has been delivered to each of the Banks, fairly present, in
     conformity with generally accepted accounting principles applied on a basis
     consistent with the financial statements referred to in paragraph (b) of
     this Section, the financial position of the Borrower as of such date
     (subject to normal year-end adjustments and not including footnotes or
     schedules required by generally accepted accounting principles).

(c)  Except as disclosed in writing to the Banks, there has been no material
     adverse change since March 31, 1993 in the business, operations, assets or
     condition (financial or otherwise) of the Borrower, considered as a whole.

(d)  Except as disclosed in writing to the Banks, there is no action, suit or
     proceeding pending or, to the knowledge of the Borrower, threatened
     against or affecting the Borrower in any court or before or by any
     arbitrator, governmental department, agency or instrumentality, an adverse
     decision in which might materially and adversely affect the business,
     operations, affairs,

                                       27

 
     assets, condition (financial or otherwise) or results of operations of the
     Borrower considered as a whole or the ability of the Borrower to perform
     its obligations hereunder and under the Notes or which in any manner draws
     into question the validity of this Agreement or the Notes.

(e)  No Default has occurred and is continuing.

(f)  No consent, authorization, order or approval of (or filing or registration
     with) any governmental commission, board or other regulatory authority
     (other than routine reporting requirements) is required for the execution,
     delivery and performance by the Borrower of this Agreement or of the Notes.

(g)  Each member of the Controlled Group has fulfilled its obligations under the
     minimum funding standards of ERISA and the Code with respect to each Plan
     and is in compliance in all material respects with the presently applicable
     provisions of ERISA and the Code, and has not incurred any liability to the
     PBGC or a Plan under Title IV of ERISA.

(h)  Each of the Contribution Agreement and the Company Regulations is in full
     force and effect in accordance with its respective terms as originally
     executed except for any amendments, modifications or waivers which do not
     affect the Borrower in any material fashion, including without limitation
     (1) any amendments, modifications or waivers which do not, in the
     aggregate, materially reduce the rights of the Borrower thereunder against
     Lyondell or CITGO or materially increase the obligations of the Borrower
     thereunder to Lyondell or CITGO and (2) any other amendments, modifications
     or waivers to which the Required Banks have consented in writing.  True and
     complete copies of all amendments, modifications and waivers referred to
     above have been delivered to the Agent for each of the Banks.

(i)  The Borrower is not an "investment company" within the meaning of the
     Investment Company Act of 1940, as amended, or a "public-utility company"
     or a "holding company" within the meaning of the Public Utility Holding
     Company Act of 1935 or a "public utility" under the laws of the State of
     Texas.

(j)  The Borrower has good and indefeasible fee simple title to or valid and
     enforceable leasehold interests in all of its real property, and good title
     to all of its other property and assets (which property, real or otherwise,
     is material to the businesses, operations, properties, assets or condition,
     financial or otherwise, of the Borrower, considered as a whole), and none
     of such property or assets is subject to any Lien, except as permitted by
     Section 5.03.  Except as permitted in Section 5.03, there is not on file in
     any public office, and the Borrower has not signed any financing statement
     naming it as debtor.  The

                                       28

 
     Borrower has not subordinated any of its rights under any obligation owing
     to it the rights of any other Person.  The Borrower has no subsidiary.

(k)  All information heretofore furnished by or on behalf of the Borrower to the
     Agent or any Bank for purposes of or in connection with this Agreement or
     any transaction contemplated hereby is, and all such information hereafter
     furnished by the Borrower to the Agent or any Bank will be, true, accurate
     and complete in every material respect or based on reasonable estimates on
     the date as of which such information is stated or certified.


(l)  Except as set forth in Lyondell's Annual Report on Form 10-K for the year
     ended 1992 and any subsequent documents filed by Lyondell pursuant to the
     Securities Exchange Act of 1934, there does not exist any violation by the
     Borrower of any law, rule, regulation or order of any government or
     government agency relating to the Environmental Matters which will or
     threatens to impose a liability on the Borrower or which will require an
     expenditure by the Borrower to cure such violation, which liability or
     expenditure would be material to the Borrower.

                                   ARTICLE V

                                   COVENANTS

The Borrower agrees that, so long as any Bank has any Commitment hereunder or
any amount payable under any Note remains unpaid:

SECTION 5.01.  CERTAIN INFORMATION TO BE FURNISHED BY THE BORROWER. The Borrower
will deliver to each Bank:

(a)  as soon as available and in any event within one hundred twenty (120) days
     after the end of each of its fiscal years, the balance sheet of the
     Borrower as of the end of such fiscal year and the related statements of
     income, stockholder's equity and cash flows for such year, setting forth in
     each case in comparative form the figures for the previous fiscal year,
     prepared in accordance with generally accepted accounting principles
     consistently applied and so certified by a nationally recognized firm of
     independent certified public accountants;

(b)  as soon as available and in any event within sixty (60) days after the end
     of each of the first three quarters of each of its fiscal years, the
     balance sheet of the Borrower as of the end of such fiscal quarter, the
     related statement of income for such fiscal quarter and for the portion of
     the fiscal year ended with such quarter and the related statement of cash
     flows for the portion of the

                                       29

 
     fiscal year ended with such quarter, setting forth in each case in
     comparative form the figures for the corresponding quarter and the
     corresponding portion of the Borrower's previous fiscal year, all
     certified (subject to normal year-end adjustments and not including
     footnotes or schedules required by generally accepted accounting
     principles) as to fairness of presentation, generally accepted accounting
     principles and consistency by the chief financial officer or the chief
     accounting officer of the Borrower;

(c)  simultaneously with the delivery of the financial statements referred to in
     clause (a) and (b) above, a certificate of the Borrower signed by an
     Authorized Officer of the Borrower stating whether there exists on the date
     of such certificate any Default, and, if any such Default then exists,
     specifying the nature and period of existence thereof and the action the
     Borrower is taking and proposes to take with respect thereto;

(d)  forthwith, if at any time any officer of the Borrower shall obtain
     knowledge of any Default, a certificate of an Authorized Officer specifying
     the nature and period of existence thereof and the action the Borrower is
     taking and proposes to take with respect thereto;

(e)  if and when any member of the Controlled Group (i) gives or is required to
     give notice to the PBGC of any "reportable event" (as defined in Section
     4043 of ERISA) with respect to any Plan which might constitute grounds for
     a termination of such Plan under Title IV of ERISA, or knows that the plan
     administrator of any Plan has given or is required to give notice of any
     such reportable event, a copy of the notice of such reportable event given
     or required to be given to the PBGC; (ii) receives notice of complete or
     partial withdrawal liability under Title IV of ERISA, a copy of such
     notice; or (iii) receives notice from the PBGC under Title IV of ERISA of
     an intent to terminate or appoint a trustee to administer any Plan, a copy
     of such notice;

(f)  in the event of any damage, loss or casualty to or destruction of any
     portion of any facility of the Borrower, the Borrower shall give prompt
     notice thereof to the Banks, specifying the nature and extent of such
     damage, loss, casualty or destruction and whether such damage, loss,
     casualty or destruction, in the reasonable judgment of the Borrower,
     materially adversely affects the production capacity of such facility or
     the economic value of such facility; provided that the Borrower shall have
     no obligation to deliver such notice if the damage to the facility in the
     good faith judgment of the Borrower will not cost in excess of $25,000,000
     to rebuild, replace or restore or if such damage does not materially
     adversely affect such production capacity or the economic value of the
     facility;

                                       30

 
(g)  in the event of any total or partial shutdown of any production or storage
     facility of the Borrower or any Subsidiary in connection with any
     Environmental Matter, the Borrower shall give prompt notice thereof to the
     Banks, specifying the reason for such shutdown; provided that the Borrower
     shall have no obligation to deliver such notice if in the good faith
     judgment of the Borrower such shutdown will not result in a reduction of
     consolidated net income of $25,000,000 or more over the remaining period of
     this Agreement; and

(h)  from time to time such further information regarding compliance with this
     Agreement or the business, operations, assets, condition (financial or
     otherwise), material change or results of operations of the Borrower as the
     Agent, at the request of any Bank, may reasonably request.


SECTION 5.02.  MAINTENANCE OF PROPERTY; INSURANCE.

(a)  The Borrower will keep all property useful and necessary in its business in
     good working order and condition, ordinary wear and tear excepted.

(b)  The Borrower will maintain insurance to the extent available to the
     Borrower on commercially reasonable terms and will furnish to the Banks,
     upon request from the Agent, information presented in reasonable detail as
     to the insurance so carried.


SECTION 5.03.  LIMITATION ON LIENS.

Nothing in this Agreement shall in any way restrict or prevent the Borrower from
incurring any Debt; provided that neither the Borrower will issue, assume or
guarantee any Debt secured by any Lien or grant any Lien to secure any such Debt
without effectively providing that all of the Notes (together with, if the
Borrower so determines, any other Debt then existing and any other Debt
thereafter created ranking equally with the Notes) shall be secured equally and
ratably with (or prior to) such Debt so long as such Debt shall be so secured.
To the extent the following Liens would otherwise be prohibited by the foregoing
provisions, the foregoing provisions shall not apply to:

(a)  Liens on any property of a corporation existing at the time it becomes a
     Subsidiary or at the time it is merged into or consolidated with the
     Borrower or a Subsidiary and not created in contemplation of such event;

(b)  Liens on any property (i) existing at the time of acquisition thereof and
     not created in contemplation of such event or (ii) incurred to secure
     payment of all or part of the purchase price thereof or (iii) incurred to
     secure Debt incurred

                                       31

 
     prior to, at the time of or within ninety (90) days after acquisition
     thereof for the purpose of financing all or part of the purchase price
     thereof;

(c)  Liens on property of the Borrower existing on the date hereof and listed on
     Schedule I hereto;

(d)  Liens (i) on any improvement in connection with such improvement to be made
     on the properties of the Borrower, or (ii) on the real properties of the
     Borrower in connection with construction to be done on such real properties
     (but only on the real properties upon which such construction occurs), and
     in connection with the acquisition of real property by the Borrower (but
     only on the real property so acquired), after the date hereof, securing
     Debt incurred or assumed either

     (i)  at the time of or within twenty-four (24) months after commencement of
          improvement or construction or

     (ii) within ninety (90) days after completion of improvement or
          construction of such plant in a principal amount not exceeding the
          cost of such improvement or construction and the cost of acquisition
          of such plant and such real estate;

(e)  Liens which secure only Debt owing by a Subsidiary to the Borrower or
     another Subsidiary;

(f)  Liens in favor of the United States of America or any state thereof or any
     department, agency, instrumentality or political subdivision of any such
     jurisdiction to secure partial, progress, advance or other payments
     pursuant to any contract or statute or to secure any Debt incurred for the
     purpose of financing all or any part of the purchase price or cost of
     constructing or improving the property subject to such Lien, including,
     without limitation, Liens to secure Debt of the pollution control or
     industrial revenue bond type;

(g)  Liens required by any contract or statute in order to permit the Borrower
     or a Subsidiary to perform any contract or subcontract made by it with or
     at the request of the United States of America, any state or any
     department, agency or instrumentality or political subdivision of either;
     or

(h)  any extension, renewal or replacement (or successive extensions, renewals
     or replacements), in whole or in part, of any Lien referred to in the
     foregoing clauses (a) to (g) inclusive or of any Debt secured thereby,
     provided that the principal amount of Debt secured thereby shall not exceed
     the principal amount of Debt so secured at the time of such extension,
     renewal or replacement, and that such extension, renewal or replacement
     Lien shall be limited to all or part

                                       32

 
     of substantially the same property which secured the Lien extended, renewed
     or replaced (plus improvements on such property); provided that the
     Borrower may issue, assume or guarantee Debt secured by Liens which would
     otherwise be subject to the foregoing restrictions or grant any such Lien
     to secure any such Debt in an aggregate principal amount which, together
     with the aggregate outstanding principal amount of all Debt of the Borrower
     which would otherwise be subject to the foregoing restrictions (not
     including Debt permitted to be secured under clauses (a) to (h) inclusive
     above) does not at any one time exceed the greater of $50,000,000 or ten
     percent (10%) of net tangible assets of the Borrower.


SECTION 5.04.  CONSOLIDATION, MERGER.

(a)  Nothing contained in this Agreement shall prevent any consolidation or
     merger of the Borrower with or into any other limited liability company or
     other organization (whether or not affiliated with the Borrower), or
     successive consolidations or mergers in which the Borrower or its successor
     or successors shall be a party or parties, or shall prevent any sale or
     conveyance of all or substantially all the property of the Borrower, to any
     other Person (whether or not affiliated with the Borrower) authorized to
     acquire and operate the same; provided, however, that upon any such
     consolidation, merger, sale or conveyance, other than a consolidation or
     merger in which the Borrower is the continuing organization, the due and
     punctual payment of the principal of and interest on all of the Notes,
     according to their tenor, and the due and punctual performance and
     observance of all of the covenants and conditions of this Agreement, shall
     be expressly assumed by instrument satisfactory to the Required Banks and
     executed and delivered to the Agent by the organization (if other than the
     Borrower) (i) formed by such consolidation or into which the Borrower shall
     have been merged or by the Person which shall have acquired such property
     and (ii) satisfactory to the Required Banks; and provided further that no
     Default shall exist hereunder after giving effect to such consolidation,
     merger or sale of assets.

(b)  If, upon any consolidation or merger of the Borrower with or into any other
     organization, or upon the sale or conveyance of all or substantially all
     the property of the Borrower to any other Person, any of the property of
     the Borrower would thereupon become subject to any Lien, the Borrower,
     prior to or simultaneously with such consolidation, merger, sale or
     conveyance, will secure the Notes and all other obligations of the Borrower
     under this Agreement equally and ratably with any other obligations of the
     Borrower then entitled thereto, by a direct Lien on all such property prior
     to all Liens other than any theretofore existing thereon.

                                       33

 
SECTION 5.05.  USE OF PROCEEDS.

The proceeds of the Loans made under this Agreement will be used by the Borrower
for general corporate purposes.  None of such proceeds will be used in violation
of Regulation U, Regulation X, Regulation G or of any similar laws or
regulations.


SECTION 5.06.  COMPLIANCE WITH LAWS.

The Borrower will comply in all material respects with all applicable laws,
ordinances, rules, regulations, and requirements to governmental authorities
(including, without limitation, ERISA and the rules and regulations thereunder,
and relating to the Environmental Matters) except where the necessity of
compliance therewith is contested in good faith by appropriate proceedings.


SECTION 5.07.  NO MATERIAL CHANGE.

The Borrower shall not amend, supplement, waive or modify the Crude Supply
Agreement in any way which would result in a material change of terms set forth
in the Crude Supply Agreement as in effect as of the date hereof, without
written consent of the Required Banks.


                                   ARTICLE VI


                                    DEFAULTS

SECTION 6.01.  DEFAULTS.

If one or more of the following events (herein called "Events of Default") shall
occur and be continuing:

(a)  the Borrower shall default in the payment when due of any principal of any
     Loan or shall default in the payment within five (5) days of the due date
     thereof of any interest on any Loan or any other amount payable hereunder;

(b)  the Borrower shall fail to perform or observe any covenant or agreement to
     be performed by it contained in Sections 5.03 and 5.04;

(c)  the Borrower shall fail to perform or observe any covenant or agreement to
     be performed by it contained in this Agreement (other than those covered by

                                       34

 
     clause (a) or (b) above) for thirty (30) days after written notice of such
     failure is given to the Borrower by the Agent at the request of any Bank;

(d)  the Borrower shall have made, or be deemed to have made pursuant to Section
     3.02, any representation or warranty in this Agreement, or in any
     certificate, financial statement or other document delivered pursuant
     hereto, which shall prove to have been incorrect in any material respect
     when so made or deemed to have been made;

(e)  an amendment or modification to the Company Regulations shall have been
     adopted that affects the Borrower in any material fashion, including any
     amendment or modification that materially changes the ownership of the
     Borrower as in effect as of the date hereof, other than the changes in the
     Owners' Participation Percentages (as defined in the Company Regulations)
     as contemplated by the Company Regulations. reduces the rights of the
     Borrower thereunder against Lyondell or CITGO or materially increases the
     obligations of the Borrower thereunder to Lyondell or CITGO and such
     amendment or modification shall not have been consented to in writing by
     the Required Banks;

(f)  the Borrower or any Subsidiary shall fail to pay any indebtedness for
     borrowed money (other than the Loans) payable or guaranteed by it, or any
     interest or premium thereon, when due (whether by scheduled maturity,
     required prepayment, acceleration, demand or otherwise) and such failure
     shall continue after the applicable grace period, if any, specified in the
     agreement or instrument relating to such indebtedness or guarantee;
     provided that the aggregate amount of such indebtedness or guarantee,
     including any interest or premium thereon, shall exceed $20,000,000;

(g)  the Borrower shall commence a voluntary case or other proceeding seeking
     liquidation, reorganization or other relief with respect to itself or its
     debts under any bankruptcy, insolvency or other similar law now or
     hereafter in effect or seeking the appointment of a trustee, receiver,
     liquidator, custodian or other similar official of it or any substantial
     part of its property, or shall consent to any such relief or to the
     appointment of or taking possession by any such official in an involuntary
     case or other proceeding commenced against it, or shall make a general
     assignment for the benefit of creditors, or shall fail generally to pay its
     debts as they become due, or shall take any corporate action to authorize
     any of the foregoing, or shall admit in writing its inability to pay its
     debts as they become due;

(h)  an involuntary case or other proceeding shall be commenced against the
     Borrower seeking liquidation, reorganization or other relief with respect
     to it or its debts under any bankruptcy, insolvency or other similar law
     now or hereafter in effect or seeking the appointment of a trustee,
     receiver, liquidator, custodian

                                       35

 
     or other similar official of it or any substantial part of its property,
     and such involuntary case or other proceeding shall remain undismissed and
     unstayed for a period of sixty (60) days; or an order for relief shall be
     entered against the Borrower under the federal bankruptcy laws as now or
     hereafter in effect;

(i)  any member of the Controlled Group shall fail to pay when due an amount or
     amounts aggregating in excess of $25,000,000 which it shall have become
     liable to pay to the PBGC or to a Plan under Title IV of ERISA; or notice
     of intent to terminate a Plan or Plans having aggregate Unfunded Vested
     Liabilities in excess of $25,000,000 (collectively, a "Material Plan")
     shall be filed under Title IV of ERISA by any member of the Controlled
     Group, any plan administrator or any combination of the foregoing; or the
     PBGC shall institute proceedings under Title IV of ERISA to terminate or to
     cause a trustee to be appointed to administer any Material Plan or a
     proceeding shall be instituted by a fiduciary of any Material Plan against
     any member of the Controlled Group to enforce Section 515 of ERISA and such
     proceeding shall not have been dismissed within thirty (30) days
     thereafter; or a condition shall exist by reason of which the PBGC would be
     entitled to obtain a decree adjudicating that any Material Plan must be
     terminated;

(j)  a final, non-appealable judgment or order for the payment of money in
     excess of $25,000,000 shall be rendered against the Borrower and such
     judgment or order shall continue unsatisfied for a period of thirty (30)
     days; or

(k)  A default shall have occurred and shall be continuing under either the
     Company Regulations or the Crude Supply Agreement

then, and in every such event, the Agent shall (i) if requested by Banks having
more than fifty percent (50%) in aggregate amount of the Commitments, by notice
to the Borrower terminate the Commitments, and they shall thereupon terminate,
and (ii) if requested by Banks holding Notes evidencing more than fifty percent
(50%) in aggregate principal amount of the Loans, by notice to the Borrower
declare the full unpaid principal of and accrued interest on the Loans and the
Notes and all other amounts payable hereunder to be immediately due and payable,
whereupon the Commitments shall terminate and the Loans and the Notes and such
other amounts shall be immediately due and payable, without further notice,
presentment, demand, protest or other formality of any kind, all of which are
hereby expressly waived by the Borrower; provided that in the case of the
occurrence of an event referred to in clause (f) or (g) above, the Commitments
shall automatically terminate and the full unpaid principal of and accrued
interest on the Loans and the Notes and all other amounts payable hereunder
shall automatically become immediately due and payable, without notice,
presentment, demand, protest or other formality of any kind, all of which are
hereby expressly waived by the Borrower.

                                       36

 


SECTION 6.02.  NOTICE OF DEFAULT.

The Agent shall give notice to the Borrower under Section 6.01(c) promptly upon
being requested to do so by any Bank and shall thereupon notify all the Banks
thereof.


                                  ARTICLE VII

                                   THE AGENT

SECTION 7.01.  APPOINTMENT AND AUTHORIZATION.

Each Bank irrevocably appoints and authorizes the Agent to take such action as
agent on its behalf and to exercise such powers under this Agreement and the
Notes as are delegated to the Agent by the terms hereof or thereof, together
with all such powers as are reasonably incidental thereto.


SECTION 7.02.  AGENT AND AFFILIATES.

Continental Bank National Association shall have the same rights and powers
under this Agreement as any other Bank and may exercise or refrain from
exercising the same as though it were not the Agent, and Continental Bank N. A.
and its affiliates may accept deposits from, lend money to, and generally engage
in any kind of business with the Borrower or any Subsidiary or any affiliate
thereof as if it were not the Agent hereunder.


SECTION 7.03.  ACTION BY AGENT.

(a)  The obligations of the Agent hereunder are only those expressly set forth
     herein. Without limiting the generality of the foregoing, the Agent shall
     not be required to take any action with respect to any Default, except as
     expressly provided in Article VI.


SECTION 7.04.  CONSULTATION WITH EXPERTS.

The Agent may consult with legal counsel (who may be counsel for the Borrower),
independent public accountants and other experts selected by it and shall not be
liable for any action taken or omitted to be taken by it in good faith in
accordance with the advice of such counsel, accountants or experts.

                                       37

 

SECTION 7.05.  LIABILITY OF AGENT.

Neither the Agent nor any of its directors, officers, agents or employees shall
be liable to any Bank for any action taken or not taken by it in connection
herewith

     (i)  with the consent or at the request of the Required Banks or

     (ii) in the absence of its own gross negligence or willful misconduct.
          Neither the Agent nor any of its directors, officers, agents or
          employees shall be responsible for or have any duty to ascertain,
          inquire into or verify (i) any statement, warranty or representation
          made in connection with this Agreement or any Borrowing hereunder;
          (ii) the performance or observance of any of the covenants or
          agreements of any Borrower; (iii) the satisfaction of any condition
          specified in Article III, except receipt of items required to be
          delivered to the Agent; or (iv) the validity, effectiveness or
          genuineness of this Agreement, the Notes or any other instrument or
          writing furnished in connection herewith.  The Agent shall not incur
          any liability by acting in reliance upon any notice, consent,
          certificate, statement, or other writing (which may be a bank wire,
          telex or similar writing) reasonably believed by it to be genuine or
          to be signed by the proper party or parties.


SECTION 7.06.  INDEMNIFICATION.

Each Bank shall, ratably in accordance with its Commitment, indemnify the Agent
(to the extent not reimbursed by the Borrower) against any cost, expense
(including counsel fees and disbursements), claim, demand, action, loss or
liability (except such as result from the Agent's gross negligence or willful
misconduct) that the Agent may suffer or incur in connection with this Agreement
or any action taken or omitted by the Agent hereunder.


SECTION 7.07.  CREDIT DECISION.

Each Bank acknowledges that it has, independently and without reliance upon the
Agent or any other Bank, and based on such documents and information as it has
deemed appropriate, made its own credit analysis and decision to enter into this
Agreement.  Each Bank also acknowledges that it will, independently and without
reliance upon the Agent or any other Bank, and based on such documents and
information as it shall deem appropriate at the time, continue to make its own
credit decisions in taking or not taking any action under this Agreement.

                                       38

 
SECTION 7.08.  SUCCESSOR AGENT.

The Agent may resign at any time by giving written notice thereof to the Banks
and the Borrower, with such resignation to be effective upon the acceptance by a
successor Agent of its appointment as agent hereunder, as set forth below.  Upon
any such resignation, the Required Banks shall have the right to appoint a
successor Agent.  If no successor Agent shall have been so appointed by the
Required Banks, and shall have accepted such appointment, within (thirty) 30
days after the retiring Agent's giving of notice of resignation, then the
retiring Agent may, on behalf of the Banks, appoint a successor Agent, which
shall be a Bank or a commercial bank organized under the laws of the United
States of America or of any state thereof and having a combined capital and
surplus of at least $50,000,000.  Upon the acceptance of its appointment as
Agent hereunder by a successor Agent, such successor Agent shall thereupon
succeed to and become vested with all the rights and duties of the retiring
Agent, and the retiring Agent shall be discharged from its duties and
obligations hereunder.  After any retiring Agent's resignation hereunder as
Agent, the provisions of this Article shall inure to its benefit as to any
actions taken or omitted to be taken by it while it was Agent.


                                  ARTICLE VIII

                            CHANGE IN CIRCUMSTANCES

SECTION 8.01.  ILLEGALITY.

If, after the Effective Date, the adoption of any applicable law, rule or
regulation, or any change therein, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by any Bank (or its Euro-Dollar Lending Office) with any request or directive
(whether or not having the force of law) of any such authority, central bank or
comparable agency shall make it unlawful or impossible for any Bank (or its
Euro-Dollar Lending Office) to make, maintain or fund its Euro-Dollar Loans and
such Bank shall so notify the Agent, the Agent shall forthwith give notice
thereof to the other Banks and the Borrower whereupon until such Bank notifies
the Borrower and the Agent that the circumstances giving rise to such suspension
no longer exist, the obligation of such Bank to make Euro-Dollar Loans shall be
suspended.  Before giving any notice to the Agent pursuant to this Section, such
Bank shall designate a different Euro-Dollar Lending Office if such designation
will avoid the need for giving such notice and will not, in the judgment of such
Bank, be otherwise disadvantageous to such Bank.  If such Bank shall determine
that it may not lawfully continue to maintain and fund any of its outstanding
Euro-Dollar Loans to maturity and shall so specify in such notice, the Borrower
shall immediately prepay in full the then outstanding principal amount of each
such affected

                                       39

 
Euro-Dollar Loan, together with accrued interest thereon.  Concurrently with
prepaying each such affected Euro-Dollar Loan, the Borrower shall borrow a
Reference Rate Loan (or, if the Borrower so elects by at least one Domestic
Business Day's notice to the Agent and such Bank the Borrower shall borrow a CD
Loan), from such Bank in a principal amount equal to the principal amount of
such affected Euro-Dollar Loan for an Interest Period coincident with the
remaining term of the Interest Period applicable to such affected Euro-Dollar
Loan of the Borrower, and such Bank shall make such a Reference Rate Loan.


SECTION 8.02.  INCREASED COST AND REDUCED RETURN.

(a)  If on or after the Effective Date, in the case of any Committed Loan or any
     obligation to make Committed Loans the adoption of any applicable law,
     rule or regulation, or any change therein, or any change in the
     interpretation or administration thereof by any governmental authority,
     central bank or comparable agency charged with the interpretation or
     administration thereof, or compliance by any Bank (or its Parent or
     Applicable Lending Office) with any request or directive (whether or not
     having the force of law) of any such authority, central bank or comparable
     agency:

          shall impose, modify or deem applicable any reserve, special deposit,
          deposit insurance assessment or similar requirement (including,
          without limitation, any such requirement imposed by the Board of
          Governors of the Federal Reserve System, but excluding (A) with
          respect to any CD Loan any such requirement included in an applicable
          Domestic Reserve Percentage and (B) with respect to any Euro-Dollar
          Loan any such requirement with respect to which such Bank is entitled
          to compensation during the relevant Interest Period under Section
          8.04) against assets of, deposits with or for the account of, or
          credit extended by, any Bank (or its Applicable Lending Office);

     and the result of any of the foregoing is to reduce the amount of any sum
     received or receivable by such Bank (or its Applicable Lending Office)
     under this Agreement or under its Notes with respect thereto, by an amount
     deemed by such Bank to be material, then, within fifteen (15) days after
     demand by such Bank (with a copy to the Agent), the Borrower shall pay to
     such Bank (without duplication of amounts otherwise payable hereunder) such
     additional amount or amounts as will compensate such Bank for such
     increased cost or reduction with respect to such affected sum.

(b)  If any Bank shall have reasonably determined that the adoption of any
     applicable law, rule or regulation regarding capital adequacy or any change
     therein, or any change in the interpretation or administration thereof by
     any governmental

                                       40

 
    authority, central bank or comparable agency charged with the interpretation
    or administration thereof, or compliance by any Bank (or its Parent or
    Applicable Lending Office) with any request or directive regarding capital
    adequacy (whether or not having the force of law) of any such authority,
    central bank or comparable agency, has or has had the effect of reducing the
    rate of return on capital of such Bank (or its Parent) as a consequence of
    such Bank's obligations hereunder to a level below that which such Bank or
    its Parent could have achieved but for such adoption, change or compliance
    (taking into consideration such Bank's policies with respect to capital
    adequacy) by an amount deemed by such Bank to be material, then from time
    to time, within fifteen (15) days after demand by such Bank (with a copy to
    the Agent), the Borrower shall pay to such Bank (without duplication of
    amounts otherwise payable hereunder) such additional amount or amounts as
    will compensate such Bank or its Parent for such reduction.

(c) Each Bank will promptly notify the Borrower and the Agent of any event of
    which it has knowledge, occurring after the Effective Date, which will
    entitle such Bank to compensation pursuant to this Section and will
    designate a different Applicable Lending Office if such designation will
    avoid the need for, or reduce the amount of, such compensation and will
    not, in the judgment of such Bank, be otherwise disadvantageous to such
    Bank.  A certificate of any Bank claiming compensation under this Section,
    setting forth the additional amount or amounts to be paid to it hereunder
    and setting forth in reasonable detail the basis for such compensation shall
    be conclusive in the absence of manifest error, and the amount set forth
    therein shall be payable by Borrower within five (5) days after receipt of
    such certificate.  In determining such amount, such Bank may use any
    reasonable averaging and attribution methods.

(d) In the event a Bank shall incur any loss or expense (including any loss or
    expense incurred by reason of the liquidation or reemployment of deposits or
    other funds acquired by such Bank to make, continue or maintain any  portion
    of the principal amount of any Loan as, or to convert any portion of the
    principal amount of any Loan into, a CD Loan or Euro-Dollar Loan) as a
    result of

    (1)   any conversion or repayment or prepayment of the principal amount of
          any CD Loan or Euro-Dollar Loan on a date other than the scheduled
          last day of the Interest Period applicable thereto;

    (2)   any Loans not being made as CD Loans or Euro-Dollar Loans in
          accordance with any request therefor; or

    (3)   any Loans not being continued as, or converted into, CD Loans or Euro-
          Dollar Loans in accordance with the notice therefor,

                                       41

 
    then, upon the written notice of such Bank to the Borrower, the Borrower
    shall, within five days of its receipt thereof, pay to such Bank such amount
    as will (in its reasonable determination) reimburse such Bank for such loss
    or expense.  Such written notice (which shall include calculations in
    reasonable detail) shall, in the absence of manifest error, be conclusive
    and binding on the Borrower.

(e) If a Bank shall have determined that

    (1)   U.S. dollar certificates of deposit or U.S. dollar deposits, as the
          case may be, in the relevant amount and for the relevant Interest
          Period are not available to such Bank in its relevant market; or

    (2)   by reason of circumstances affecting such Bank's relevant market,
          adequate means do not exist for ascertaining the interest rate
          applicable hereunder to CD Loans or Euro-Dollar Loans of such type,

    then, upon notice from such Bank to the Borrower, such Bank's obligations
    under this Agreement to make or continue any Loans as, or to convert any
    Loans into, CD Loans or Euro-Dollar Loans of such type shall forthwith be
    suspended until such Bank shall notify the Borrower that the circumstances
    causing such suspension no longer exist.


SECTION 8.03.  SUBSTITUTE LOANS.

If (i) the obligation of any Bank to make Euro-Dollar Loans has been suspended
pursuant to Section 8.01 or (ii) any Bank has demanded compensation under
Section 8.02(a) and the Borrower shall, by at least five (5) Euro-Dollar
Business Days' prior notice to such Bank through the Agent, have elected that
the provisions of this Section shall apply to such Bank, then, unless and until
such Bank notifies the Borrower that the circumstances giving rise to such
suspension or demand for compensation no longer apply:

(a) all Loans which would otherwise be made by such Bank as CD Loans or Euro-
    Dollar Loans, as the case may be, shall be made instead as Reference Rate
    Loans.


SECTION 8.04.   REGULATION D COMPENSATION.

Each Bank may require the Borrower to pay, contemporaneously with each payment
of interest on Euro-Dollar Borrowings, additional interest on the related Euro-
Dollar Loan of such Bank at a rate per annum equal to the excess of (i) (A) the
applicable London Interbank Offered Rate divided by (B) one minus the Euro-
Dollar Reserve

                                       42

 
Percentage over (ii) the rate specified in clause (i)(A).  Any Bank electing to
require payment of such additional interest shall so notify the Borrower and the
Agent, at least five (5) Euro-Dollar Business Days prior to each date on which
interest is payable on the Euro-Dollar Loans of the amount then due it under
this Section.


SECTION 8.05.  SUBSTITUTION OF BANK.

If (i) the obligation of any Bank to make Euro-Dollar Loans has been suspended
pursuant to 8.01 or (ii) any Bank has demanded compensation under Section 8.02
or 8.04, the Borrower shall have the right, with the assistance of the Agent, to
seek a mutually satisfactory substitute bank or banks (which may be one or more
of the Banks) to purchase the Notes for cash without recourse to such Bank and
assume the Commitment of such Bank.  Any such purchase shall be at par, shall be
without prejudice to the Borrower's obligations under Section 9.04 and shall
release such Bank from all further obligations under this Agreement.



                                   ARTICLE IX

                                 MISCELLANEOUS

SECTION 9.01.  NOTICES.

(a) All notices and other communications provided for herein shall be in writing
    (including bank wire, telecopy, or similar writing) and shall be given to
    the intended recipient at the "Address for Notices" specified, if the
    intended recipient is the Borrower or the Agent, below its name on the
    signature pages hereof or, if the intended recipient is a Bank, in such
    Bank's Administrative Questionnaire, or, as to any party, at such other
    address as shall be designated by such party in a notice to the Borrower and
    the Agent. All notices and other communications shall be effective

    (i)   if given by mail, 72 hours after such communication is deposited in
          the mails with first class postage prepaid, addressed as aforesaid,

    (ii)  if given by telecopier, upon confirmation that the telecopied document
          has been received by the individual to whom it was addressed, or

    (iii) if given by any other means, when delivered at the address specified
          in this Section; provided that notices to the Agent under Article II
          or VIII hereof shall not be effective until received and notices to
          the Borrower under Section 6.01 shall not be effective until such
          notice is delivered.

                                       43

 
(b) All notices given to the Borrower shall also be given to LYONDELL at the
    address below and to CITGO at the address below:

           to LYONDELL:

           Lyondell Petrochemical Company
           1221 McKinney, Suite 1600
           One Houston Center
           Houston, Texas  77010
           Attention:  Treasurer

           to CITGO:

           CITGO Petroleum Corporation
           One Warren Place
           6100 S. Yale
           Tulsa, Oklahoma  74136
           Attention:  Treasurer


SECTION 9.02.  NO WAIVER.

No failure on the part of the Agent or any Bank to exercise and no delay in
exercising, and no course of dealing with respect to, any right, power or
privilege under this Agreement or any Note shall operate as a waiver thereof,
nor shall any single or partial exercise of any right, power or privilege under
this Agreement or any Note preclude any other or further exercise thereof or the
exercise of any other right, power or privilege.  The remedies provided herein
are cumulative and not exclusive of any remedies provided by law.


SECTION 9.03.  GOVERNING LAW.

THIS AGREEMENT, THE NOTES AND THE REQUESTS, INVITATIONS AND OFFERS PROVIDED FOR
HEREIN SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE
STATE OF ILLINOIS.


SECTION 9.04.  EXPENSES; DOCUMENTARY TAXES; INDEMNIFICATION.

(a) The Borrower shall pay, within thirty (30) days after receipt of a
    reasonably detailed statement setting forth the amount and nature thereof,
    (i) all out-of-pocket expenses of the Agent, including the reasonable fees
    and disbursements of special counsel for the Agent, in connection with the
    preparation of this

                                       44

 
    Agreement, any waiver or consent hereunder or any amendment hereof or any
    Default or alleged Default hereunder and (ii) if an Event of Default occur,
    all out-of-pocket expenses incurred by the Agent or any Bank, including
    reasonable fees and disbursements of counsel, in connection with such Event
    of Default and collection and other enforcement proceedings resulting
    therefrom.  The Borrower shall indemnify each Bank against any transfer
    taxes, documentary taxes, assessments or charges made by any governmental
    authority by reason of the execution and delivery of this Agreement or the
    Notes.

(b) The Borrower agrees to indemnify each Bank and the Agent and hold each Bank
    and the Agent harmless from and against any and all liabilities (including
    without limitation, environmental liabilities), losses, damages, costs and
    expenses of any kind (including, without limitation, the reasonable fees and
    disbursements of counsel for any Bank and the Agent in connection with any
    investigative, administrative or judicial proceeding, whether or not such
    Bank or the Agent shall be designated a party thereto) which may be incurred
    by any Bank, or by the Agent in connection with its actions as Agent
    hereunder, relating to or arising out of Article VI or VII of this Agreement
    or any actual or proposed use of proceeds of Loans hereunder; provided that
    neither any Bank nor the Agent shall have the right to be indemnified
    hereunder for its own gross negligence or willful misconduct as determined
    by a court of competent jurisdiction.


SECTION 9.05.  AMENDMENTS, ETC.

Any provision of this Agreement or the Notes may be amended or waived if, but
only if, such amendment or waiver is in writing and is signed by the Borrower
and the Required Banks (and, if the rights or duties of the Agent are affected
thereby, by the Agent); provided that no such amendment, waiver or modification
shall, unless signed by all the Banks,

    (i)   increase or decrease the Commitment of any Bank or subject any Bank to
          any additional obligation (except for increases to the Commitment of
          any Bank pursuant to Section 8.05 to which such Bank has agreed in
          writing),

    (ii)  reduce the principal of or rate of interest on any Loan or any fees
          hereunder,

    (iii) postpone the date fixed for any payment of principal of or interest on
          any Loan or any fees hereunder or for any reduction or termination of
          any Commitment,

                                       45

 
    (iv)  change the percentage of the Commitments or of the aggregate unpaid
          principal amount of the Notes, or the number of Banks, which shall be
          required for the Banks or any of them to take any action under this
          Section or any other provision of this Agreement or

    (v)   amend or waive any provision of Section 3.01 or Section 9.05.


SECTION 9.06.  COUNTERPARTS; INTEGRATION.

This Agreement may be executed in any number of counterparts, all of which taken
together shall constitute one and the same instrument, and any of the parties
hereto may execute this Agreement by signing any such counterpart.  This
Agreement constitutes the entire agreement and understanding among the parties
hereto and supersedes any and all prior agreements and understandings, oral or
written, relating to the subject matter hereof.


SECTION 9.07.  SUCCESSORS AND ASSIGNS.

(a) The provisions of this Agreement shall be binding upon and inure to the
    benefit of the parties hereto and their respective successors and assigns,
    except that the Borrower may not assign or otherwise transfer any of its
    rights under this Agreement without the prior written consent of all Banks,
    except as set forth in Section 5.04(a).

(b) Any Bank may at any time grant to one or more banks or other institutions
    (each a "Participant") participating interests in its Commitment or any or
    all of its Loans.  In the event of any such grant by a Bank of a
    participating interest to a Participant, whether or not upon notice to the
    Borrower and the Agent, such Bank shall remain responsible for the
    performance of its obligations hereunder, and the Borrower and the Agent
    shall continue to deal solely and directly with such Bank in connection with
    such Bank's rights and obligations under this Agreement.  Any agreement
    pursuant to which any Bank may grant such a participating interest shall
    provide that such Bank shall retain the sole right and responsibility to
    enforce the obligations of the Borrower hereunder including, without
    limitation, the right to approve any amendment, modification or waiver of
    any provision of this Agreement; provided that such participation agreement
    may provide that such Bank will not agree to any modification, amendment or
    waiver of this Agreement described in clause (i), (ii), (iii) or (iv) of
    Section 9.05 without the consent of the Participant.  The Borrower agrees
    that each Participant shall be entitled to the benefits of Sections 2.11 and
    9.04 and Article VIII with respect to its participating interest; provided
    that all amounts payable to a Bank for the account of a Participant under
    Sections 2.11

                                       46

 
    and 9.04 and Article VIII shall be determined as if such Bank had not
    granted such participation to the Participant.  An assignment or other
    transfer which is not permitted by subsection (c) below shall be given
    effect for purposes of this Agreement only to the extent of a participating
    interest granted in accordance with this subsection (b).

(c) Any Bank may upon 5 days notice by the Agent and the Borrower at any time
    assign to one or more banks or other institutions (each an "Assignee") all,
    or a part of all(a minimum of $5,000,000, in multiples of $1,000,000) of its
    rights and obligations under this Agreement and the Notes, and such Assignee
    shall assume such rights and obligations, pursuant to an instrument
    substantially in the form of Exhibit B attached hereto, executed by such
    Assignee and such transferor Bank, with (and subject to) the subscribed
    consent of the Borrower and the Agent, which consent shall not be
    unreasonably withheld; provided that if an Assignee is an affiliate of such
    transferor Bank, no such consent shall be required.  Upon execution by the
    transferor Bank, the Borrower, the Assignee and the Agent, and delivery of,
    such an instrument and payment by such Assignee to such transferor Bank of
    an amount equal to the purchase price agreed between such transferor Bank
    and such Assignee, such Assignee shall be a Bank party to this Agreement and
    shall have all the rights and obligations  of a Bank with a Commitment as
    set forth in such instrument of assumption, and the transferor Bank shall be
    released from its obligations hereunder to the extent of such assignment,
    and no further consent or action by any party shall be required.  Upon the
    consummation of any assignment pursuant to this subsection (c), the
    transferor Bank, the Agent and the Borrower shall make appropriate
    arrangements so that, if required, new Notes are issued to the Assignee.
    Prior to the issuance of any such new Note, the Assignee to which such Note
    is issued shall pay to the Agent a fee of $2,500.

(d)  No Assignee or other transferee of any Bank's rights shall be entitled to
    receive any greater payment under Section 8.02 than such Bank would have
    been entitled to receive with respect to the rights transferred, unless such
    transfer is made with the Borrower's prior written consent or by reason of
    the provisions of Section 8.01 or 8.02 requiring such Bank to designate a
    different Lending Office under certain circumstances or at a time when the
    circumstances giving rise to such greater payment did not exit.


SECTION 9.08.  SURVIVAL.

The obligation of the Borrower under Article VIII and Section 9.04 shall survive
the repayment of the Loans and the termination of the Commitments.

                                       47

 
SECTION 9.09.  ACKNOWLEDGEMENT.

The Borrower acknowledges that the Banks have entered into this Agreement in
reliance on the Borrower's assurance that the Borrower does not intend to use
the proceeds of any Borrowings hereunder in a manner which would violate any
applicable law or governmental rule or regulation.


SECTION 9.10. HEADINGS.

The Table of Contents and Article and Section headings used herein shall not
affect the interpretation of any provision of this Agreement.


SECTION 9.11.  SHARING OF SETOFFS.

Each Bank agrees that, if it shall, by exercising any right of setoff or
counterclaim or otherwise, receive payment of a proportion of the aggregate
amount of principal and interest due with respect to any Note held by it which
is greater than the proportion received by any other Bank in respect of the
aggregate amount of principal and interest due with respect to any Note held by
such other Bank (other than disproportionate payments to any Bank provided for
by this Agreement), the Bank receiving such proportionately greater payment
shall purchase such participation in the Notes held by the other Banks, and such
other adjustments shall be made, as may be required so that all such payments of
principal and interest with respect to the Notes held by the Banks shall be
shared by the Banks pro rata; provided that nothing in this Section shall impair
the right of any Bank to exercise any right of setoff or counterclaim it may
have and to apply the amount recovered thereby to the payment of indebtedness of
the Borrower other than its indebtedness under the Notes.  If under any
applicable bankruptcy, insolvency or other similar law, any Bank receives a
secured claim in lieu of a setoff to which this Section applies, such Bank
shall, to the extent practicable, exercise its rights in respect of such secured
claim in a manner consistent with the rights of the Banks entitled under this
Section to share in the benefits of any recovery on such secured claim.  The
Borrower agrees, to the fullest extent it may effectively do so under applicable
law, that any Bank which is a holder of a participation in a Note, whether or
not acquired pursuant to the foregoing arrangements, may exercise rights of
setoff or counterclaim and               other rights with respect to such
participation as fully as if such holder of a participation were a direct
creditor of the Borrower in the amount of such participation.

                                       48

 

SECTION 9.12.  COLLATERAL.

Each of the Banks represents to the Agent and each of the other Banks that it in
good faith is not relying upon any "margin stock" (as defined in Regulation U)
as collateral in the extension or maintenance of the credit provided for in this
Agreement.


SECTION 9.13.  CONSENT TO JURISDICTION.

(A) THE BORROWER IRREVOCABLY SUBMITS TO THE JURISDICTION OF ANY FEDERAL OR
    ILLINOIS STATE COURT OVER ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR
    RELATING TO THIS AGREEMENT OR ANY NOTE.  THE BORROWER IRREVOCABLY WAIVES, TO
    THE FULLEST EXTENT PERMITTED BY LAW ANY OBJECTION WHICH IT MAY NOW OR
    HEREAFTER HAVE TO THE LAYING OF THE VENUE OF ANY SUCH SUIT, ACTION OR
    PROCEEDING BROUGHT IN SUCH COURT AND ANY CLAIM THAT ANY SUIT, ACTION OR
    PROCEEDING BROUGHT IN SUCH A COURT HAS BEEN BROUGHT IN AN INCONVENIENT
    FORUM.  THE BORROWER AGREES THAT A FINAL, NONAPPEALABLE JUDGMENT IN ANY SUCH
    SUIT, ACTION OR PROCEEDING BROUGHT IN SUCH A COURT SHALL BE CONCLUSIVE AND
    BINDING UPON THE BORROWER AND MAY BE ENFORCED IN ANY FEDERAL OR ILLINOIS
    STATE COURT (OR ANY OTHER COURTS TO THE JURISDICTION OP WHICH THE BORROWER
    IS OR MAY BE SUBJECT) BY A SUIT UPON SUCH JUDGMENT, PROVIDED THAT SERVICE OF
    PROCESS IS EFFECTED UPON THE BORROWER IN ONE OP THE MANNERS SPECIFIED IN
    SUBSECTION (B) OF THIS SECTION OR AS OTHERWISE PERMITTED BY LAW.

(B) IN LIGHT OF THE EXPRESS INTENT OF THE PARTIES TO SUBMIT TO THE JURISDICTION
    OF ILLINOIS COURTS FOR THE RESOLUTION OF ANY AND ALL DISPUTES ARISING UNDER
    THIS AGREEMENT, THE PARTIES FURTHER HEREBY WAIVE ANY AND ALL AFFIRMATIVE
    DEFENSES THEY COULD OR MIGHT OTHERWISE BE ABLE TO ASSERT BASED ON AN ALLEGED
    INCAPACITY OF THE BORROWER (SOLELY BASED ON CERTAIN STATUTORY PROVISIONS OF
    ILLINOIS LAW) TO ASSERT A CLAIM OR COUNTER-CLAIM IN EITHER THE FEDERAL OR
    STATE COURTS OF THE STATE OF ILLINOIS.  THE AFFIRMATIVE DEFENSES AND MOTIONS
    HEREBY WAIVED INCLUDE BUT ARE NOT LIMITED TO OBJECTIONS TO SUIT PURSUANT TO
    THE ILLINOIS BUSINESS CORPORATION ACT SECTION 13.70, AS AMENDED, AND ANY
    SIMILAR ILLINOIS PARTNERSHIP LAW STATUTE.  THE PARTIES WAIVE ALL AFFIRMATIVE
    DEFENSES AND DEFENSIVE MOTIONS PREDICATED ON,, THE FOREGOING STATUTORY
    PROVISIONS WITH FULL KNOWLEDGE OF THEIR RIGHTS, IF ANY, UNDER THOSE
    PROVISIONS.  IT IS THE EXPRESS AND KNOWING INTENTION OF THE PARTIES TO WAIVE
    THE RIGHT TO ASSERT AS

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    AN AFFIRMATIVE DEFENSE THE LEGAL INCAPACITY OF THE BORROWER TO MAINTAIN A
    CLAIM OR COUNTER-CLAIM ON THE GROUNDS THAT IT FAILED TO COMPLY WITH ANY OR
    ALL REGISTRATION, CERTIFICATION, NOTIFICATION, FILING OR DESIGNATION-OF-
    AGENT REQUIREMENTS SET FORTH AND ENFORCED BY THE FOREGOING OR ANY SIMILAR
    STATUTORY PROVISIONS.

(C) SERVICE OF PROCESS.  THE BORROWER HEREBY CONSENTS TO PROCESS BEING SERVED
    IN ANY SUIT, ACTION OR PROCEEDING REFERRED TO IN THE FIRST SENTENCE OF
    SUBSECTION (A) OF THIS SECTION IN ANY FEDERAL OR ILLINOIS STATE COURT BY
    MAILING A COPY THEREOF BY REGISTERED OR CERTIFIED AIR MAIL, POSTAGE PREPAID,
    RETURN RECEIPT REQUESTED, TO THE BORROWER AT ITS ADDRESS SPECIFIED IN
    SECTION 9.01 OR TO ANY OTHER ADDRESS OF WHICH THE BORROWER SHALL HAVE GIVEN
    WRITTEN NOTICE TO THE AGENT.  THE BORROWER IRREVOCABLY WAIVES TO THE FULLEST
    EXTENT PERMITTED BY LAW, ALL CLAIM OF ERROR BY REASON OF ANY SUCH SERVICE IN
    ANY SUIT, ACTION OR PROCEEDING BROUGHT BY THE AGENT OR ANY BANK.  THE
    BORROWER AGREES THAT SUCH SERVICE SHALL BE DEEMED IN EVERY RESPECT EFFECTIVE
    SERVICE OF PROCESS UPON THE BORROWER IN ANY SUCH SUIT, ACTION OR PROCEEDING
    AND SHALL, TO THE FULLEST EXTENT PERMITTED BY LAW, BE TAKEN AND HELD TO BE
    VALID AND PERSONAL SERVICE UPON AND PERSONAL DELIVERY TO THE BORROWER.

(D) NO LIMITATION ON SERVICE OR SUIT.  NOTHING IN THIS ARTICLE SHALL AFFECT THE
    RIGHT OF THE AGENT OR ANY BANK TO SERVE PROCESS IN ANY OTHER MANNER
    PERMITTED BY LAW OR LIMIT THE RIGHT OF THE AGENT OR ANY BANK TO BRING
    PROCEEDINGS AGAINST THE BORROWER IN THE COURTS OF THE JURISDICTION OF THE
    BANK'S LENDING OFFICE OR THE COURTS OP ANY JURISDICTION OR JURISDICTIONS IN
    WHICH THE BORROWER HAS ANY ASSETS.


SECTION 9.14.  WAIVER OF JURY TRIAL

THE AGENT, THE BANKS AND THE BORROWER HEREBY KNOWINGLY, VOLUNTARILY AND
INTENTIONALLY WAIVE ANY RIGHTS THEY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF
ANY LITIGATION BASED HEREON, OR ARISING OUT OF, UNDER, OR IN CONNECTION WITH,
THIS AGREEMENT OR ANY OTHER LOAN DOCUMENT, OR ANY COURSE OF CONDUCT, COURSE OF
DEALING, STATEMENTS (WHETHER VERBAL OR WRITTEN) OR ACTIONS OF THE AGENT, THE
BANKS OR THE BORROWER.  THE BORROWER ACKNOWLEDGES AND AGREES THAT IT HAS
RECEIVED FULL AND SUFFICIENT CONSIDERATION FOR THIS PROVISION (AND EACH OTHER
PROVISION OF EACH OTHER LOAN DOCUMENT TO WHICH IT IS A

                                       50

 
PARTY) AND THAT THIS PROVISION IS A MATERIAL INDUCEMENT FOR THE AGENT AND THE
BANKS ENTERING INTO THIS AGREEMENT AND EACH SUCH OTHER LOAN DOCUMENT.

    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed as of the day and year first above written.

                                   LYONDELL-CITGO REFINING COMPANY LTD.

                                   By:          /s/ William E. Haynes
                                      -----------------------------------------
                                   Title: President and Chief Executive Officer
 
                                          Address for Notices:
 
                                          One Houston Center
                                          Suite 1600
                                          1221 McKinney Street
                                          P. O. Box 3646
                                          Houston TX  77253-3646
                                          Attn:  Controller
 
                                          Telephone No.:  713-475-4111
                                          Telecopier No.:  713-951-1505
 
                                   CONTINENTAL BANK N.A.
                                          As Agent

                                   By:          /s/ Ronald E. McKaig
                                      -----------------------------------------
                                   Title:            Vice President


                                          Address for Notices:

                                          231 South La Salle Street
                                          Chicago, Illinois  60697
                                          Attn: Robert Ingersoll

                                          Telephone No.: 312-828-6720
                                          Telecopier No.: 312-987-5614

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