1
                                                                     EXHIBIT 2.1


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                            ASSET PURCHASE AGREEMENT

                                  By and Among

                       BP CORPORATION NORTH AMERICA INC.,

                               AMOCO OIL COMPANY

                                      and


                          TESORO PETROLEUM CORPORATION



                                  Dated as of

                                 July 16, 2001




                                Relating to the

                               Purchase and Sale

                   of the Mandan Refinery and Related Assets

================================================================================

   2


                               TABLE OF CONTENTS

<Table>
<Caption>
                                                                            PAGE
                                                                      
1. PURCHASE AND SALE OF THE BUSINESS ......................................    1

2. EXCLUDED ASSETS ........................................................    5

3. DEPOSIT AND PURCHASE PRICE .............................................    7
        (a) Deposit .......................................................    7
        (b) Purchase Price ................................................    8
        (c) Closing Date Payments .........................................    9
        (d) Post-Closing Adjustment .......................................    9

4. ASSUMPTION OF LIABILITIES ..............................................   10
        (a) Assumed Liabilities ...........................................   10
        (b) Excluded Liabilities ..........................................   12

5. CLOSING ................................................................   14

6. SELLER'S REPRESENTATIONS AND WARRANTIES ................................   16
        (a) Organization and Good Standing ................................   16
        (b) Authority .....................................................   17
        (c) Consents ......................................................   17
        (d) No Breach .....................................................   17
        (e) Real Property .................................................   17
        (f) Brokers .......................................................   18
        (g) Machinery and Equipment .......................................   19
        (h) Compliance With Laws ..........................................   19
        (i) Permits .......................................................   19
        (j) Intellectual Property .........................................   19
        (k) Actions and Proceedings .......................................   19
        (l) Collective Bargaining Agreements ..............................   20
        (m) Assets ........................................................   20
        (n) Tangible Assets ...............................................   20

7. ENVIRONMENTAL MATTERS ..................................................   21
        (a) Environmental Representations and Warranties ..................   21
        (b) Limitation ....................................................   21

8. DISCLAIMERS ............................................................   21
</Table>


                                      -i-
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<Table>
                                                                      

9. BUYER'S REPRESENTATIONS AND WARRANTIES .................................   23
        (a) Organization and Good Standing ................................   23
        (b) Authority of Buyer ............................................   23
        (c) Consents ......................................................   23
        (d) No Breach .....................................................   24
        (e) Litigation ....................................................   24
        (f) Brokers .......................................................   24
        (g) Availability of Funds .........................................   24
        (h) No Knowledge of Misrepresentations or Omissions ...............   24

10. COVENANTS .............................................................   24
        (a) Covenants of Seller ...........................................   24
            (i)    Access and Information .................................   24
            (ii)   Conduct of Business ....................................   25
            (iii)  Schedules ..............................................   26
            (iv)   Confidentiality ........................................   27
            (v)    Sale of North Dakota Core Pipeline Interest ............   27
        (b) Covenants of Buyer ............................................   28
            (i)    Confidentiality ........................................   28
            (ii)   Notification ...........................................   29
            (iii)  Litigation .............................................   29
            (iv)   Title Policies .........................................   30
            (v)    Removal of Seller Marks ................................   30
            (vi)   Project Sunshine Consent Decree ........................   30
            (vii)  Easement Agreements ....................................   31
        (c) Mutual Covenants ..............................................   31
            (i)    H-S-R ..................................................   31
            (ii)   Assignments ............................................   32
            (iii)  Transition Services Agreement ..........................   34
            (iv)   Other Governmental Approvals ...........................   35
            (v)    Other Actions ..........................................   35
            (vi)   Throughput Agreement ...................................   35
            (vii)  Retail Marketing Facilities ............................   35
            (viii) Jobber Business ........................................   35

11. EMPLOYEES .............................................................   36
        (a) Employees .....................................................   36
        (b) Employment Offers to Active Non-Union Employees, to Active
              Non-Refinery Union Employees, and to All Refinery Union
              Employees ...................................................   36
        (c) Employment Offers to Non-Union Employees on Leave and to
              Non-Refinery Union Employees on Leave .......................   37
</Table>


                                      -ii-
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<Table>
                                                                              
        (d) Transfer Time ........................................................   37
        (e) Level of Employee Benefits Provided by Buyer .........................   37
        (f) Pension Plans ........................................................   37
        (g) Defined Contribution Pension Plans ...................................   38
        (h) Welfare Benefits and Other Benefits and Policies .....................   38
        (i) Vacation .............................................................   38
        (j) Severance ............................................................   39
        (k) Buyer's Adoption of Collective Bargaining Agreement ..................   39
        (l) WARN Act .............................................................   39
        (m) Service Credit .......................................................   40

12. BUYER'S OBLIGATION TO CLOSE ..................................................   40
        (a) Compliance with Agreement ............................................   40
        (b) Representations and Warranties .......................................   40
        (c) Litigation ...........................................................   40
        (d) Governmental Consents ................................................   41

13. SELLER'S OBLIGATION TO CLOSE .................................................   41
        (a) Compliance with Agreement ............................................   41
        (b) Representations and Warranties .......................................   41
        (c) Litigation ...........................................................   41
        (d) Governmental Consents ................................................   41

14. FURTHER ASSURANCES ...........................................................   41

15. INDEMNIFICATION ..............................................................   42
        (a) Buyer's Indemnification of Seller ....................................   42
        (b) Seller's Indemnification of Buyer ....................................   42
        (c) Environmental Indemnifications .......................................   43
        (d) Exclusive Remedy .....................................................   44
        (e) Procedures Relating to Indemnification Among Buyer and Seller ........   45
        (f) Procedures Relating to Indemnification for Third Party Claims ........   46
        (g) Losses Net of Insurance and Taxes ....................................   47
        (h) Attorneys' Fees ......................................................   47
        (i) Time Limitation ......................................................   47
        (j) Monetary Limitation ..................................................   47
        (k) Limitation of Liability ..............................................   48
        (l) Environmental Remediation Monetary Limitation ........................   48
        (m) Rights-of-Way Monetary Limitation ....................................   48
        (n) Mitigation ...........................................................   49
</Table>


                                     -iii-
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<Table>
                                                                              
        (o) Losses ................................................................ 49

16. TAXES ......................................................................... 49

17. RECORDS/LITIGATION ASSISTANCE ................................................. 50

18. TERMINATION RIGHTS ............................................................ 50

19. SPECIFIC PERFORMANCE .......................................................... 52

20. NOTICES ....................................................................... 52

21. GOVERNING LAW; SUBMISSION TO JURISDICTION ..................................... 53

22. PUBLICITY ..................................................................... 54

23. SURVIVAL OF COVENANTS, REPRESENTATIONS AND WARRANTIES ......................... 54

24. ENTIRE AGREEMENT .............................................................. 54

25. ASSIGNMENT .................................................................... 55

26. AMENDMENT AND WAIVER .......................................................... 55

27. EXPENSES ...................................................................... 55

28. HEADINGS ...................................................................... 55

29. COUNTERPARTS .................................................................. 56

30. INTERPRETATION ................................................................ 56

31. NO STRICT CONSTRUCTION ........................................................ 56

32. SCHEDULES ..................................................................... 56

33. REPRESENTATION BY COUNSEL; INTERPRETATION ..................................... 57

34. SEVERABILITY .................................................................. 57
</Table>


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<Table>
                                                                           
35. BULK TRANSFER LAWS ....................................................   57

36. NO THIRD PARTY BENEFICIARIES ..........................................   57

37. DEFINITION OF AFFILIATE ...............................................   57

38. TIME OF ESSENCE .......................................................   57

39. NO CONDITIONS .........................................................   57
</Table>


                                      -v-
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                                   SCHEDULES

<Table>
<Caption>
 SCHEDULE                                DESCRIPTION
 --------                                -----------
              
   1(a)          Major Refinery Equipment and Facilities
   1(b)          Refinery Real Property
   1(c)          Retail Marketing Assets
   1(d)          Retail Marketing Real Property
   1(h)          Terminal Assets
   1(i)          Terminal Real Property
   1(j)          Product Pipelines
   1(k)          Contracts
   1(n)          Third-Party Process Technology Licenses
   1(r)          Jobber Business
   2(c)          Excluded Assets Related to Support and Other Services Provided to the
                 Refinery by the BP Group
   2(d)          Excluded Assets: North Dakota Crude Pipeline
   2(p)          Other Excluded Assets
   2(q)          Excluded Contracts
   2(s)          Intercompany Agreements
   6(c)          Consents
   6(d)          No Breach
  6(e)(i)        Real Property Exceptions
   6(g)          Machinery and Equipment
   6(h)          Compliance
   6(i)          Permits
   6(k)          Actions and Proceedings
   6(l)          Collective Bargaining Agreements
   6(m)          Assets
   6(n)          Tangible Assets
   7(a)          Environmental Matters
10(a)(ii)        Conduct of Business
10(b)(vii)       Easement Agreements
  11(a)          Employees
  11(k)          Letter of Understanding- Successorship
</Table>



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                                    EXHIBITS

<Table>
<Caption>
                  EXHIBIT                    DESCRIPTION
                  -------                    -----------
                            
                     A         Methodology For Valuing Inventories

                     B         Form of Technology Transfer and License Agreement

                     C         Form of Deeds for Real Property

                     D         Form of Transition Services Agreement

                     E         Form of Product Offtake Agreement

                     F         Form of Throughput Agreement
</Table>


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                             INDEX TO DEFINED TERMS

<Table>
<Caption>
Term                                                                               Page
----                                                                               ----
                                                                                
affiliate ........................................................................   57
Agreement ........................................................................    1
Amoco ............................................................................    1
Asbestos-Related Liabilities .....................................................   11
Assumed Liabilities ..............................................................   10
Base Price .......................................................................    9
BP ...............................................................................    1
BP Group .........................................................................    4
BP RAP ...........................................................................   37
BP Severance Plan ................................................................   39
Business .........................................................................    1
Buyer ............................................................................    1
Buyer Indemnified Parties ........................................................   42
Buyer Pension Plan ...............................................................   37
CBA ..............................................................................   39
CERCLA ...........................................................................   12
Closing ..........................................................................   14
Closing Date .....................................................................   14
Code .............................................................................   15
Confidentiality Agreement ........................................................   24
Data .............................................................................   25
Deposit ..........................................................................    7
Deposit Return Event .............................................................    8
Disclosed Environmental Liabilities ..............................................   11
Employees ........................................................................   36
Environmental Permits ............................................................    3
ERISA ............................................................................   37
Excluded Assets ..................................................................    5
Excluded Liabilities .............................................................   12
First Threshold ..................................................................   48
H-S-R Act ........................................................................   14
Health, Safety and Environmental Laws ............................................   12
Hydrocarbon Inventories ..........................................................    2
Indemnification Notice ...........................................................   45
Indemnified Party ................................................................   45
Indemnifying Party ...............................................................   45
Inventories ......................................................................    2
knowledge ........................................................................   16
Leave ............................................................................   36
</Table>


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<Table>
                                                                                  
Level 1 Threshold .................................................................   48
Level 2 Threshold .................................................................   48
Losses ............................................................................   49
Non-Hydrocarbon Inventories .......................................................    2
Non-Refinery Union Employees ......................................................   36
Non-Refinery Union Transferred Employees ..........................................   36
Non-Refinery Unions ...............................................................   36
Non-Union Employees ...............................................................   36
Non-Union Transferred Employees ...................................................   36
Jobber Business ...................................................................    4
Offering Memorandum ...............................................................   22
Offsite Environmental Liabilities .................................................   14
ordinary course of business .......................................................    4
Permits ...........................................................................    3
Permitted Liens ...................................................................   18
Person ............................................................................   17
Personal Property .................................................................    2
Pipeline Assets ...................................................................   27
Pipeline Purchase Agreement .......................................................   28
Product Pipelines .................................................................    3
Project Sunshine Consent Decree ...................................................   11
Purchase Price ....................................................................    8
Purchased Assets ..................................................................    1
Refinery ..........................................................................    1
Refinery Real Property ............................................................    1
Refinery Union ....................................................................   36
Refinery Union Employees ..........................................................   36
Refinery Union Transferred Employees ..............................................   36
Remediation Losses ................................................................   43
Retail Marketing Assets ...........................................................    2
Retail Marketing Facility .........................................................    2
Retail Marketing Real Property ....................................................    2
Rights-of-Way Losses ..............................................................   43
Second Threshold ..................................................................   48
Seller ............................................................................    1
Seller Indemnified Parties ........................................................   42
Seller Information ................................................................   29
Seller Vacation Policy ............................................................   38
Seller's knowledge ................................................................   16
Taxes .............................................................................    5
Technology Agreement ..............................................................    3
Terminal Assets ...................................................................    3
Terminal Real Property ............................................................    3
</Table>

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<Table>
                                                                                  

Third Party Buyer .................................................................   27
Third Party Claim .................................................................   46
Threshold .........................................................................   47
Throughput Agreement ..............................................................   35
Transferred Employees .............................................................   36
Transition Services Agreement .....................................................   34
Union Employees ...................................................................   36
Unions ............................................................................   36
WARN Obligations ..................................................................   39
</Table>



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                            ASSET PURCHASE AGREEMENT

                  This ASSET PURCHASE AGREEMENT for the purchase and sale of
assets ("Agreement"), is made and entered into as of July 16, 2001, by and among
BP Corporation North America Inc., an Indiana corporation ("BP"), and Amoco Oil
Company, a Maryland corporation ("Amoco," and together with BP, "Seller"), on
the one hand, and Tesoro Petroleum Corporation, a Delaware corporation
("Buyer"), on the other hand.

                                   WITNESSETH:

            WHEREAS, upon and subject to the terms and conditions of this
Agreement, Seller wishes to sell its petroleum refining assets located in the
vicinity of Mandan, North Dakota and related assets and certain retail marketing
assets as described below (the "Business") and certain liabilities, each as
further described in Sections 1 and 4, and Buyer wishes to purchase the Business
and to assume certain liabilities relating thereto, in each case upon the terms
and subject to the conditions set forth herein;

            NOW, THEREFORE, in consideration of the mutual promises made herein
and for other good and valuable consideration, the receipt and sufficiency of
which is hereby expressly acknowledged, and subject to the conditions
hereinafter set forth, the parties hereto agree as follows:

         1. PURCHASE AND SALE OF THE BUSINESS. Subject to the terms and
conditions of this Agreement (including the provisions of Section 10(c)(ii)),
Seller agrees to sell, assign, convey, transfer and deliver, or cause such sale,
assignment, conveyance, transfer and delivery by Seller's affiliates, to Buyer,
as of the Closing Date, and Buyer agrees to purchase and take assignment and
delivery from Seller as of the Closing Date, of all of Seller's rights, title
and interest in the following assets relating to the Business (the "Purchased
Assets"):

                  (a) the refinery and related equipment and facilities of
         Seller located in the vicinity of Mandan, North Dakota, including the
         process units, storage tanks, control houses, office buildings,
         laboratory facilities, warehouses, boiler houses, power plants, waste
         water treatment facilities and other similar facilities of such
         refinery, major items of which are listed on Schedule 1(a) attached
         hereto (the "Refinery");

                  (b) the real property on which the Refinery is situated,
         whether or not contiguous, owned by Seller and used in the operation of
         the Business as it is currently operated by Seller, in each case as
         more particularly described on Schedule 1(b) attached hereto, including
         (subject to Section 2(i)) the improvements to such real property
         together with all appurtenances thereto and the fixtures thereon (the
         "Refinery Real Property");

                  (c) the retail marketing assets and related equipment relating
         to the twelve (12) retail marketing facilities of Seller located in
         North Dakota, including all storage tanks,

   13

         gasoline pumps, automated and manual carwash facilities, air pumps,
         motor vehicles and other similar equipment in each case as more
         particularly described on Schedule 1(c) attached hereto (the "Retail
         Marketing Assets");

                  (d) the real property on which the Retail Marketing Assets are
         situated and used exclusively in the operation of the Business as it is
         currently operated by Seller, in each case as more particularly
         described on Schedule 1(d) attached hereto, including, subject to
         Section 2(i), the improvements to such real property together with all
         appurtenances thereto and fixtures thereon (the "Retail Marketing Real
         Property and each individual location together with the related real
         property, a "Retail Marketing Facility")

                  (e) the hydrocarbon inventories (the "Hydrocarbon
         Inventories") of the Business (including any such inventories located
         at the marketing terminals described in Section 1(h) or in the product
         pipeline serving those marketing terminals, as described in Section
         1(j)) as of the Closing Date (which shall be measured and valued in
         accordance with Exhibit A attached hereto), including:

                           (i) all crude oil inventories at, or in transit to,
                  the Business where title has passed to Seller;

                           (ii) all crude oil inventories in the storage tanks
                  at the Business (it being expressly understood by the parties
                  hereto that all such hydrocarbon inventories shall consist of
                  the total contents thereof, regardless of whether above or
                  below the off-take pipe, including bottom sediment and water);

                           (iii) all refined and intermediate product
                  inventories at the Business; and

                           (iv) all additives at the Business;

         but in all cases excluding all finished and unfinished products which
         have left the Business and are en route to any customer (including the
         BP Group) where title has passed to the customer;

                  (f) the non-hydrocarbon inventories of the Business as of the
         Closing Date consisting of (i) the chemicals and catalyst inventories
         located at the Business and (ii) the stores inventories, including
         maintenance and capital spares, joints, valves and parts located at the
         Business or in any off-site storage facility, and (iii) any precious
         metals and other Non-Hydrocarbon Inventories of the Business
         (collectively, the "Non-Hydrocarbon Inventories," and together with
         Hydrocarbon Inventories, the "Inventories");

                  (g) the machinery (including machinery related to the
         utilities), vehicles and other personal property owned and used
         exclusively in the operation of the Business as it is currently
         operated by Seller (collectively, the "Personal Property");

                                      -2-
   14

                  (h) the marketing terminals, including all loading racks,
         equipment, spares and additives located in Mandan, North Dakota,
         Jamestown, North Dakota, Moorhead, Minnesota, Sauk Center, Minnesota
         and Roseville, Minnesota (the "Twin Cities Terminal"), in each case as
         more particularly described on Schedule 1(h) attached hereto (the
         "Terminal Assets");

                  (i) the real property on which the Terminal Assets are
         situated and used exclusively in the operation of the Business as it is
         currently operated by Seller, in each case as more particularly
         described on Schedule 1(i) attached hereto, including (subject to
         Section 2(i)) the improvements to such real property together with all
         appurtenances thereto and fixtures thereon (the "Terminal Real
         Property" and collectively with the Refinery Real Property and the
         Retail Marketing Real Property, the "Real Property");

                  (j) subject to Section 2(i), Seller's interest in the 8" and
         10" pipelines and all real property interests of Seller, including
         lateral pipelines, pump stations and related facilities, used to
         transport petroleum products from the Refinery to the Twin Cities
         Terminal, each as more particularly described on Schedule 1(j) attached
         hereto (collectively, the "Product Pipelines"), including, subject to
         Section 10(c)(ii), all assignable or transferrable easements,
         rights-of-way, permits, licenses, leases and other rights of access to
         the Product Pipelines (the "Product Pipeline Agreements");

                  (k) subject to Section 10(c)(ii), all assignable or
         transferable rights and obligations of Seller under the supply,
         distribution, exchange, collective bargaining and other agreements,
         contracts, leases, licenses and similar instruments relating
         exclusively to the Business as it is currently operated by Seller,
         including those set forth on Schedule 1(k) attached hereto;

                  (l) subject to Section 10(c)(ii), all assignable or
         transferable permits or licenses of Seller from any federal, state or
         local regulatory agencies which are necessary to and used exclusively
         in connection with the ownership and operation of the Business as it is
         currently operated by Seller (collectively, the "Permits"), including
         any approval, registration, authorization, certificate, certificate of
         occupancy, consent, exemption, license, order or permit or other
         similar authorization of or filing with any governmental authority
         required by applicable Health, Safety and Environmental Laws in effect
         on or prior to the Closing Date, as they are enforced with respect to
         the Business, for the ownership or operation of the Business as it is
         currently operated by Seller (collectively, the "Environmental
         Permits");

                  (m) subject to and in accordance with the Technology Transfer
         and License Agreement attached hereto as Exhibit B (the "Technology
         Agreement"), a nonexclusive, royalty-free license to use in the
         operation of the Business as it is currently operated by Seller certain
         technology, software, know-how and proprietary information owned by
         Seller, BP p.l.c. and/or its other direct or indirect subsidiaries and
         its affiliates (together with Seller, the

                                      -3-
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         "BP Group"), whether patented or unpatented, as more specifically
         described in the Technology Agreement;

                  (n) subject to Section 10(c)(ii) and subject to and in
         accordance with the Technology Agreement, Seller's assignable or
         transferable rights under the process technology licenses with third
         parties listed on Schedule 1(n) attached hereto, all as are necessary
         or used exclusively for the operation of the Business as it is
         currently operated by Seller;

                  (o) subject to Section 2(f), all operating records and data in
         possession of Seller or any other member of the BP Group and relating
         exclusively to and necessary for the operation of the Business as it is
         currently operated by Seller, including all books, records, cost and
         pricing information, accounting records, supplier lists and records,
         training materials and equipment, training records, maintenance and
         inspection reports, equipment lists, repair notes and archives;

                  (p) subject to Section 10(c)(ii) and in accordance with the
         Technology Agreement, all assignable or transferable technical drawings
         in possession of Seller located at the Business and relating
         exclusively to and necessary for the operation of the Business as it is
         currently operated by Seller; and

                  (q) all other assignable or transferable assets, active or
         inactive, owned or leased by, or licensed to or used by Seller and
         located at the Business and used exclusively in the operation of the
         Business as it is currently operated by Seller; and

                  (r) all rights and obligations of Seller under the agreements,
         contracts, leases, licenses and similar instruments relating to
         Seller's jobber business, as more particularly described on Schedule
         1(r) attached hereto (the "Jobber Business");

         provided that the Purchased Assets shall not include the Excluded
         Assets.

                  At any time and from time to time prior to the Closing, Seller
         shall have the right to update and supplement the description of the
         Purchased Assets (including the Schedules and Exhibits referred to
         above) to reflect changes, including additions and deletions, occurring
         in the ordinary course of business prior to the Closing. For purposes
         of this Agreement, the term "ordinary course of business" shall include
         all reasonably necessary actions taken in connection with, in
         contemplation of or in preparation for, the sale of the Business, the
         Closing and any other transaction contemplated by this Agreement, so
         long as such actions do not have a material adverse effect on the
         Business, taken as a whole, as it is currently operated by Seller or
         the Purchased Assets, taken as a whole.

         2. EXCLUDED ASSETS. The Purchased Assets shall not include any assets
other than those specifically described in Section 1 above, and, without
limiting the generality of the foregoing,


                                      -4-
   16
Seller (or, as applicable, other members of the BP Group) shall retain and not
sell, convey, transfer or deliver to Buyer, and Buyer shall not purchase or have
any rights in, the following assets, each of which is specifically excluded from
the Purchased Assets being sold hereunder (collectively, the "Excluded Assets"):

                  (a) cash and cash equivalents (including marketable securities
         and short-term investments);

                  (b) accounts and notes receivable and exchange balances due
         from a third party as of 12:01 a.m., Central Time, on the Closing Date,
         including payments for all finished and unfinished products which have
         left the Business and are en route to any customer (including members
         of the BP Group) prior to the Closing Date where title has passed to
         the customer; provided that all accounts receivable with respect to any
         Inventories included or to be included in the Purchased Assets shall
         not be Excluded Assets;

                  (c) assets owned by other members of the BP Group not used
         exclusively by Seller in the operation of the Business or not located
         at the Business, including employee and other records (including
         employee, personnel and medical records) necessary to administer
         salaried payrolls and benefits and welfare plans retained by Seller or
         other members of the BP Group and to file tax returns, assets related
         to certain support services provided by the BP Group to the Business
         including those described on Schedule 2(c) attached hereto and certain
         other specified assets not located at the Business as described on
         Schedule 2(c) attached hereto;

                  (d) the crude pipeline owned by members of the BP Group,
         including all lateral pipelines and gathering lines attached thereto,
         running to the Refinery and including the portion of the pipeline which
         terminates at the pumping station at the Refinery as described more
         particularly on Schedule 2(d) attached hereto;

                  (e) tax refunds arising out of all taxes, charges, fees,
         imposts, duties, levies, withholdings or other assessments imposed by
         any governmental entity, including environmental taxes, excise taxes,
         customs, duties, utility, property, income, sales, use, value added,
         transfer and fuel taxes, and any interest, fines, penalties or
         additions to tax attributable to or imposed on or with respect to any
         such assessment, including all applicable income, sales, use, excise,
         business, occupation or other tax, if any, relating in any way to this
         Agreement or any other service, supply or operating agreement
         (collectively, "Taxes") relating to the Purchased Assets accruing to or
         for any period, or portion thereof, ending prior to or on the Closing
         Date;

                  (f) all forecasts, financial information or financial
         statements and proprietary manuals (except rights to use manuals
         specific to and necessary for the operation of the Business as it is
         currently operated by Seller (as determined by Seller in its reasonable
         discretion)) prepared by or used by Seller or another member of the BP
         Group to the extent

                                      -5-
   17
         not relating exclusively to the Business and all copies of and
         subscriptions to third-party reports;

                  (g) except as otherwise expressly provided in the Technology
         Agreement, all proprietary BP Group computer systems and software;

                  (h) defenses and claims that Seller could assert against third
         parties, other than claims which Seller could assert on account of
         matters or acts as to which Buyer has agreed to assume liability or as
         to matters to the extent Buyer is entitled to be indemnified by Seller
         pursuant to this Agreement;

                  (i) any assets, property improvements, appurtenances,
         fixtures, equipment or goods located at the Business which are not
         owned by Seller, including spare parts on consignment, certain
         chemicals on consignment, leased nitrogen units, transformers, wires,
         pipes and equipment owned by Montana Dakota Utilities Co., city water
         mains and other equipment, leased and rented mobile equipment, leased
         office equipment, copiers, telephones and other leased items;

                  (j) to the extent not otherwise excluded, proprietary
         information, intellectual property (including patents, inventions and
         trade secrets (in each case, whether patentable or not) and copyrights)
         and technology of Seller and other members of the BP Group not used
         exclusively in the operation of the Business as it is currently
         operated by Seller or not otherwise assignable by Seller;

                  (k) all service marks, trademarks, trade names, trade dress or
         other indicia of origin of Seller and other members of the BP Group and
         variants thereof, including the following: the words "Amoco" and
         "Standard," any items that include the words "Amoco" or "Standard," the
         BP Group torch and oval design, the letters "BP," any items that
         include the word "BP," the phrase "BP Oil," the BP Group shield or the
         BP Group Helios logo and/or variants thereof;

                  (l) all books, documents, records and files prepared in
         connection with or relating in any way to the transactions contemplated
         by this Agreement, including bids received from other parties and
         analyses relating in any way to the Purchased Assets, the Assumed
         Liabilities and the Refinery;

                  (m) all rights of Seller and other members of the BP Group
         under or pursuant to this Agreement and the other agreements and
         transactions contemplated hereby;

                  (n) any assets, properties and rights of Seller and/or other
         members of the BP Group not used exclusively in the operation of the
         Business as it is currently operated by Seller;

                                      -6-
   18

                  (o) employment records, including personnel records and
         medical records, relating to employees of the Business, and subject to
         Section 11, all rights of Seller and other members of the BP Group and
         any assets under employee benefit plans or trusts;

                  (p) the assets, property and property improvements,
         appurtenances, fixtures, equipment, goods and rights listed on Schedule
         2(p) attached hereto;

                  (q) the rights and obligations of Seller and other members of
         the BP Group under any agreements, contracts, leases, licenses and
         similar instruments that do not relate exclusively to the Refinery or
         are not assignable by Seller, including those set forth on Schedule
         2(q) attached hereto;

                  (r) any rights under or amounts payable from present or former
         insurance policies applicable to the Business; and

                  (s) all arrangements, contracts, agreements, understandings or
         commitments, whether written or oral by and among members of the BP
         Group, other than those listed on Schedule 2(s) attached hereto (it
         being understood that all such arrangements, contracts, agreements,
         understandings or commitments will be terminated on or prior to
         Closing).

         To the extent that any Excluded Assets remain located at the Business
         or any other owned or leased real property constituting part of the
         Purchased Assets after the Closing Date, Buyer shall grant to Seller
         and other members of the BP Group and their respective representatives
         reasonable access to such property from and after the Closing Date for
         a reasonable period of time not to exceed 180 days in order to permit
         Seller and such persons to review and remove such Excluded Assets and
         make any other appropriate arrangements with respect thereto. Seller
         agrees that it will consult with Buyer in advance of taking any such
         actions following the Closing Date with a view towards establishing a
         mutually agreeable plan for such review and removal so that these
         actions will not unreasonably interfere with the normal operation of
         the Business.

         3. DEPOSIT AND PURCHASE PRICE.

                  (a) Deposit. On the date hereof, Buyer shall pay to Seller (or
         Seller's designee) in immediately available funds, by wire transfer to
         an account designated by Seller, a non-refundable deposit against the
         Purchase Price of certain of the Purchased Assets (excluding the Real
         Property) in an amount equal to Fifteen Million Dollars ($15,000,000)
         (the "Deposit"). The Deposit shall be non-refundable in that it shall
         not be returned to Buyer under any circumstances, unless this Agreement
         shall be terminated by Buyer or by Seller, the Closing shall not have
         occurred and a Deposit Return Event has occurred in which event Seller
         shall transfer to Buyer, in immediately available funds by wire
         transfer to an account designated by Buyer, a cash amount equal to the
         Deposit plus interest thereon from the date on which the Deposit was
         received by Seller through and including the date on which such

                                      -7-
   19
         payment is made at a rate of 4% per annum. As used herein, the term
         "Deposit Return Event" means the occurrence of any of the following:

                           (i) between the date hereof and the Closing Date,
                  there shall have occurred any damage, destruction or other
                  casualty losses with respect to the Purchased Assets that (A)
                  cause the Purchased Assets to become unusable or inoperable
                  and not capable of repair for a period of at least ninety (90)
                  days or (B) individually or in the aggregate, have an
                  estimated cost (as determined by Seller in good faith) to
                  repair or replace of more than Forty-Three Million Dollars
                  ($43,000,000.00), that has not been substantially repaired or
                  rectified by Seller by the later of the Closing Date or within
                  ninety (90) days after Seller becomes aware of the existence
                  of such matter (provided, for the avoidance of doubt, that if
                  Seller elects to repair or rectify any such damage,
                  destruction or other casualty losses, Seller shall bear the
                  cost of any such repair or replacement);

                           (ii) each of Buyer and Seller mutually agree that the
                  closing condition set forth in Sections 12(d) and 13(d) has
                  become incapable of fulfillment and each of Buyer and Seller
                  have complied with the obligations of Section 10(c)(i);

                           (iii) this Agreement is terminated pursuant to
                  Section 18(a)(i);

                           (iv) this Agreement is terminated by Buyer pursuant
                  to Section 18(a)(ii) (other than pursuant to Section 12(d)
                  which is covered under Section 3(a)(ii) above); provided,
                  however, that at the time of such termination, Buyer is not in
                  material breach of its representations, warranties, covenants
                  or agreements contained in this Agreement;

                           (v) this Agreement is terminated by Seller pursuant
                  to Section 18(a)(iv); provided, however, that at the time of
                  such termination, Buyer is not in material breach of its
                  representations, warranties, covenants or agreements contained
                  in this Agreement; or

                           (vi) this Agreement is terminated by Buyer pursuant
                  to Section 18(a)(v); provided, however, that at the time of
                  such termination, Buyer is not in material breach of its
                  representations, warranties, covenants or agreements contained
                  in this Agreement.

                  (b) Purchase Price. In consideration for the Purchased Assets,
         Buyer shall pay, transfer and undertake to Seller as follows
         (collectively, the "Purchase Price"):

                           (i) Buyer shall pay to Seller (or Seller's designee)
                  in cash:

                                      -8-
   20
                               (A)   a base price of Two Hundred Twenty-Two
                                     Million Dollars ($222,000,000),
                                     representing the value of the Purchased
                                     Assets (excluding the value of the
                                     Hydrocarbon Inventories) as of the Closing
                                     Date (the "Base Price"); plus

                               (B)   an amount equal to the estimated market
                                     value of the Hydrocarbon Inventories, as of
                                     the Closing Date, as determined by Seller
                                     in accordance with Exhibit A attached
                                     hereto (provided that Seller shall deliver
                                     such estimated market value to Buyer at
                                     least two (2) business days prior to the
                                     Closing Date); minus

                               (C)   an amount equal to any aggregate adjustment
                                     made in accordance with Section 10(c)(vii);
                                     minus

                               (D)   an amount equal to any aggregate adjustment
                                     made in accordance with Section
                                     10(c)(viii); and

                           (ii) Buyer shall assume and agree to pay and perform
                  and discharge when due the Assumed Liabilities.

                  For purposes of determining the market value of the
         Hydrocarbon Inventories, all Hydrocarbon Inventories which are located
         in storage tanks shall be valued as specified on Exhibit A based on the
         total contents thereof, regardless of whether above or below the
         off-take pipe, excluding only the bottom sediment and water (it being
         expressly understood by the parties hereto, however, that such bottom
         sediment and water shall constitute part of the Purchased Assets to be
         transferred to Buyer).

                  (c) Closing Date Payments. On the Closing Date, Buyer shall
         pay to Seller (or Seller's designee), in immediately available funds by
         wire transfer to an account designated by Seller, the total of (i) the
         amount equal to the Base Price plus (ii) the amount specified by
         Section 3(b)(i)(B) above, minus (iii) the amount specified in Section
         3(b)(i)(C) above, minus (iv) the amount specified in Section 3(b)(i)(D)
         above, minus (v) an amount equal to the Deposit specified in Section
         3(a) above (which amount shall already have been paid by Buyer to
         Seller upon the execution of this Agreement) plus interest thereon from
         the date on which the deposit was received by Seller through and
         including the Closing Date at a rate of 4% per annum.

                  (d) Post-Closing Adjustment. The Purchase Price shall be
         subject to adjustment based on the final market value of the
         Hydrocarbon Inventories as described in this Section 3(d). Within
         thirty (30) days following the Closing Date, the final market value of
         the Hydrocarbon Inventories as of the Closing Date shall be determined
         by Seller and Buyer in accordance with procedures specified in Exhibit
         A. If the final market value of the


                                      -9-
   21
          Hydrocarbon Inventories is greater than the estimated market value of
          the Hydrocarbon Inventories referenced in Section 3(b) above, Buyer
          shall pay to Seller an amount equal to such difference, and if the
          final market value of the Hydrocarbon Inventories is less than such
          estimated market value of the Inventories, Seller shall pay to Buyer
          an amount equal to such difference. In either case, such payment shall
          include interest from the Closing Date through and including the date
          the payment is made at a rate of 4% per annum, and such payment shall
          be made in immediately available funds within five (5) business days
          after the determination of the final market value of the Hydrocarbon
          Inventories.

         4. ASSUMPTION OF LIABILITIES.

                  (a) Assumed Liabilities. As of the Closing Date, Buyer shall,
         without any further action on the part of Buyer or Seller, assume and
         agree to pay, perform and discharge, and indemnify, defend and hold
         Seller and the other members of the BP Group harmless from, each of the
         following liabilities (collectively, the "Assumed Liabilities")
         (provided that the Assumed Liabilities shall not include the Excluded
         Liabilities):

                           (i) all obligations, responsibilities, liabilities,
                  costs and expenses of whatever kind and nature, primary or
                  secondary, direct or indirect, absolute or contingent, whether
                  based in common law or statute or arising under written
                  contract or otherwise, known or unknown, liquidated or
                  unliquidated, real or potential, tangible or intangible,
                  whether or not accrued, caused by, arising out of, incurred in
                  connection with or relating in any way to the ownership of the
                  Purchased Assets or the operation of the Business now existing
                  or arising at any time prior to, on or after the Closing Date
                  as heretofore, currently or hereafter conducted. Without
                  limiting the generality of the foregoing in this subparagraph
                  (i), the Assumed Liabilities shall include all obligations,
                  responsibilities, liabilities, costs and expenses of Seller
                  and/or any other member of the BP Group caused by, arising out
                  of, incurred in connection with or relating in any way to any
                  of the following, prior to, on or after the Closing Date:

                               (A)   the Business (including the Refinery, the
                                     Real Property, the Inventories, the
                                     Terminal Assets, the Product Pipelines and
                                     the Personal Property);

                               (B)   all of the agreements, contracts,
                                     collective bargaining agreements, leases,
                                     permits or similar instruments, including
                                     easements, rights-of-way, the Product
                                     Pipeline Agreements and other rights of
                                     access, constituting part of the Purchased
                                     Assets;

                               (C)   the Permits;

                                      -10-
   22
                               (D)   except with respect to Hydrocarbon
                                     Inventories, all accounts payable and
                                     accrued liabilities relating to goods
                                     and/or services provided to the Business on
                                     or after the Closing Date;

                               (E)   the Transferred Employees to the extent
                                     provided in Section 11;

                               (F)   all actions, grievances, arbitrations,
                                     suits, liabilities, obligations,
                                     proceedings and investigations of, relating
                                     to or arising out of the business or
                                     operations of the Business or any of the
                                     Purchased Assets, including those asserted
                                     under, relating to, arising out of or
                                     incurred in connection with Health, Safety
                                     and Environmental Laws; and

                           (ii) subject to any rights to indemnification Buyer
                  may have pursuant to Section 15, all obligations,
                  responsibilities, liabilities, costs and expenses caused by,
                  arising from, incurred in connection with or relating in any
                  way to the ownership of the Purchased Assets or the operation
                  of the Business under, relating to or otherwise required or
                  incurred to achieve or maintain compliance with Health, Safety
                  and Environmental Laws, as the same are in effect from time to
                  time, irrespective of whether the events or conditions giving
                  rise to such liabilities occurred prior to, on or after the
                  Closing Date, including (A) any and all obligations,
                  responsibilities, liabilities, costs and expenses caused by,
                  arising from, incurred in connection with or relating in any
                  way to the existence of asbestos and lead-based paint at, on
                  or within the Business or the Purchased Assets, including any
                  incidental contamination resulting therefrom (collectively,
                  the "Asbestos-Related Liabilities"), (B) any and all
                  obligations, responsibilities, liabilities, compliance costs
                  and expenses (whether presently realized or projected) caused
                  by, arising from, incurred in connection with or otherwise
                  relating in any way to the matters disclosed in that certain
                  URS report dated March 21, 2001, a copy of which previously
                  has been provided to Buyer, the Confidential Information
                  Memorandum or in any of the health, safety and environmental
                  records or reports of the Business previously provided to
                  Buyer (collectively, the "Disclosed Environmental
                  Liabilities"), (C) any and all obligations, responsibilities,
                  liabilities, compliance costs and expenses relating to
                  governmental requirements, including mandated clean-up, fines
                  and penalties, and (D) any and all obligations,
                  responsibilities, liabilities, compliance costs and expenses
                  incurred in connection with, arising as a result of or
                  otherwise required to comply with those terms and conditions
                  of the Project Sunshine Consent Decree. As used in this
                  Agreement, "Project Sunshine Consent Decree" means that
                  certain consent decree among the United States of America
                  (including certain intervening state and local governments),
                  BP Exploration and Oil Co., Amoco Oil Company and Atlantic


                                      -11-
   23
                  Richfield Company, in Civil No. 2:96CV095 RL (N.D. IN), as the
                  same may be amended, supplemented or revised from time to
                  time.

                           As used in this Agreement, "Health, Safety and
                  Environmental Laws" means any and all past, present or future
                  local, state, and federal laws, principles of common law,
                  statutes, ordinances, regulations, rules, orders, permits,
                  standards or requirements (including consent decrees, judicial
                  decisions, judgments, injunctions and administrative orders
                  issued or approved thereunder), together with all related
                  amendments and implementing regulations and all common law,
                  pertaining to or regulating pollution, environmental
                  protection, health and safety of persons, pipeline safety,
                  natural resource damages, conservation of resources, wildlife,
                  waste management, the use, storage, generation, production,
                  treatment, emission, discharge, remediation, removal, disposal
                  or transport or any other activity related to a toxic or
                  hazardous substance, waste or material (including crude
                  petroleum and its fractions or derivatives thereof), or any
                  other environmental matter, including: the Comprehensive
                  Environmental Response, Compensation and Liability Act
                  ("CERCLA"), 42 U.S.C. Section 9601 et. seq.; the Resource
                  Conservation and Recovery Act, as amended, 42 U.S.C. Section
                  6901 et. seq.; the Toxic Substances Control Act, as amended,
                  15 U.S.C. Section 2601 et. seq.; the Clean Air Act, as
                  amended, 42 U.S.C. Section 7401 et. seq.; the Federal Water
                  Pollution Control Act, as amended, 33 U.S.C. Section 1251 et.
                  seq.; the Safe Drinking Water Act of 1974, as amended, 42
                  U.S.C. Section 3009(f) et. seq.; the Emergency Planning and
                  Community Right-to-Know Act of 1986, 42 U.S.C. Section 11001
                  et. seq.; the Occupational Safety and Health Act of 1970, as
                  amended, 29 U.S.C. Section 651 et. seq.; and the Hazardous
                  Liquid Pipeline Safety Act, as amended, 49 U.S.C. Section
                  60101 et. seq.

                      Buyer's obligations under this Section 4(a) shall not be
         subject to offset or reduction by reason of any actual or alleged
         breach by Seller of any representation, warranty or covenant contained
         in this Agreement or any agreement or document delivered in connection
         herewith or any right or alleged right to indemnification hereunder.

                  (b) Excluded Liabilities. The liabilities and obligations of
         Seller and other members of the BP Group transferred to Buyer shall not
         include the following (collectively, the "Excluded Liabilities"):

                           (i) any liability or obligation for Taxes (including
                  deficiencies, interest and penalties relating thereto)
                  accruing to or for any period ending on or prior to the
                  Closing Date, except to the extent provided otherwise in
                  Section 16;

                           (ii) any liability or obligation for any expenses
                  incurred in connection with the transactions contemplated by
                  this Agreement;

                                      -12-
   24
                           (iii) any brokerage or finder's fees payable by
                  Seller or any other member of the BP Group in connection with
                  the transactions contemplated by this Agreement;

                           (iv) any liability or obligation accruing prior to
                  the Closing Date for real property taxes and charges as
                  prorated in accordance with Section 16(b);

                           (v) any liability or obligation with respect to any
                  accounts payable and exchange balances owed to a third party,
                  in each case determined in accordance with generally accepted
                  accounting principles as in effect in the United States at the
                  Closing Date (notwithstanding anything to the contrary
                  contained in this Agreement, all accounts payable with respect
                  to any Inventories shall be Excluded Liabilities);

                           (vi) any liability or obligation in respect of
                  indebtedness for borrowed money;

                           (vii) except as otherwise expressly provided in this
                  Agreement, all liabilities or obligations relating to any
                  litigation, threatened litigation or claims against Seller or
                  any other member of the BP Group to the extent attributable
                  solely to periods ending prior to the Closing Date, including
                  those set forth on Schedule 6(k) attached hereto; provided,
                  that Buyer shall provide Seller with reasonable access to (and
                  permission to take copies of) all records and reasonable
                  access to all relevant personnel of the Business in connection
                  with the defense of any such claims in accordance with the
                  provisions of Section 17 hereof;

                           (viii) to the extent attributable solely to periods
                  ending prior to the Closing Date, all liabilities or
                  obligations with respect to third party personal injury or
                  wrongful death claims, including those arising under
                  Environmental, Health and Safety Laws, relating to the
                  pre-Closing operation of the Business; provided, that (i) this
                  clause shall not be deemed to include any liability or
                  obligation for property damage and (ii) Buyer shall provide
                  Seller with reasonable access to (and permission to take
                  copies of) all records and reasonable access to all relevant
                  personnel of the Business in connection with the defense of
                  any such claims in accordance with the provisions of Section
                  17 hereof;

                           (ix) all liabilities or obligations relating to any
                  violations by Seller or other members of the BP Group of
                  antitrust laws prior to the Closing Date;

                           (x) all liabilities or obligations arising under
                  Environmental, Health and Safety Laws with respect to the
                  disposal prior to the Closing Date by Seller or any member of
                  the BP Group (or by a third-party at the express direction of
                  Seller of any member of the BP Group) at any location other
                  than the Purchased Assets of hazardous materials generated as
                  a result of or in connection with the operation of the
                  Business (the "Offsite Environmental Liabilities");

                                      -13-
   25


                           (xi) any responsibility for the payment of any
                  criminal sanctions against Seller or other members of the BP
                  Group imposed at any time arising from the operation of the
                  Purchased Assets prior to the Closing Date; provided that
                  Buyer shall provide Seller with reasonable access to (and
                  permission to take copies of) all records and reasonable
                  access to all relevant personnel of the Business in connection
                  with the defense of any such claims in accordance with Section
                  17 hereof; and

                           (xii) any liability or obligation related to an
                  Excluded Asset.

         5. CLOSING.

                  (a) Subject to the parties' satisfaction or waiver of the
         conditions precedent set forth in Sections 12 and 13, the closing and
         consummation of the transactions contemplated by this Agreement (the
         "Closing") shall take place at 10:00 a.m., Central Time, at the offices
         of Kirkland & Ellis at 200 East Randolph Drive, Chicago, Illinois, on a
         business day which is not later than five (5) business days after the
         expiration of the waiting period, or any extension thereof (without
         challenge), provided for in the Hart-Scott-Rodino Antitrust Improvement
         Act of 1976, as amended (the "H-S-R Act"), if a filing is required. The
         date of the Closing is referred to herein as the "Closing Date."

                  (b) On the Closing Date, Seller shall deliver to Buyer the
         following:

                           (i) duly-executed limited or special warranty deeds
                  for the Real Property, substantially in the form of Exhibit C
                  attached hereto, conveying fee simple title to such Real
                  Property subject to the Permitted Liens;

                           (ii) appropriately executed instruments of sale,
                  assignment, transfer and conveyance evidencing and effecting
                  the sale and transfer to Buyer of the Purchased Assets (it
                  being expressly understood by the parties hereto, however,
                  that such instruments shall not require Seller or any other
                  Person to make any additional representations, warranties or
                  covenants, express or implied, not contained in this
                  Agreement);

                           (iii) a certified copy of the resolution(s) adopted
                  by the Board of Directors of Seller authorizing the
                  transactions contemplated by this Agreement and authorizing
                  specified individuals to act on behalf of Seller in connection
                  therewith;

                           (iv) an incumbency certificate, duly executed by an
                  authorized officer of Seller attesting to the due appointment
                  and authorization of individuals signing this

                                      -14-
   26


                  Agreement on behalf of Seller, any agreement contemplated
                  hereby or any agreement related to the transactions
                  contemplated hereby;

                           (v) a current certificate of BP's good standing in
                  Indiana and Amoco's good standing in Maryland, and BP's
                  qualification to do business and good standing in North Dakota
                  and Amoco's qualification to do business and good standing in
                  North Dakota and Minnesota; and

                           (vi) the affidavit referred to in Section 1445(b)(2)
                  of the Internal Revenue Code of 1986, as amended, (the "Code")
                  in customary form.

                  (c) On the Closing Date, Buyer shall deliver to Seller the
following:

                           (i) the payments specified in Section 3(c) hereof;

                           (ii) instruments of assumption evidencing and
                  effecting the assumption by Buyer of the Assumed Liabilities
                  and such other documents as are required by this Agreement;

                           (iii) a certified copy of the resolution(s) adopted
                  by the Board of Directors of Buyer or its affiliates, as
                  appropriate, authorizing the transactions contemplated by this
                  Agreement and authorizing specified individuals to act on
                  behalf of Buyer herewith;

                           (iv) an incumbency certificate, duly executed by an
                  authorized officer of Buyer attesting to the due appointment
                  and authorization of individuals signing this Agreement on
                  behalf of Buyer, any agreement contemplated hereby or any
                  agreement related to the transactions contemplated hereby;

                           (v) a current certificate of Buyer's good standing in
                  the state of its incorporation and its qualification, or the
                  qualification of its wholly-owned subsidiary to which Buyer
                  directs that Seller convey the Purchased Assets, to do
                  business and good standing in North Dakota and Minnesota;

                           (vi) a modification to the Project Sunshine Consent
                  Decree, in a form satisfactory to Seller and the United States
                  of America, duly executed by an authorized officer of Buyer
                  (provided that such modification shall be for the purpose of
                  making Buyer a party thereto and shall not result in any
                  substantive changes in the obligations that Buyer is assuming
                  as compared to the obligations contained in the Project
                  Sunshine Consent Decree relating to the Purchased Assets as of
                  the Closing Date); and


                                      -15-
   27
                           (vii) evidence, in a form satisfactory to Seller, of
                  Buyer's acceptance of the CBA (as defined in Section 11(k)).

                  (d) On the Closing Date, Buyer and Seller shall each deliver
         duly executed counterparts by the appropriate parties of the following:

                           (i) the Technology Agreement substantially in the
                  form of Exhibit B;

                           (ii) subject to Section 10(c)(iii), the Transition
                  Services Agreement substantially in the form of Exhibit D
                  attached hereto;

                           (iii) a Product Offtake Agreement substantially in
                  the form of Exhibit E attached hereto; and

                           (iv) a Throughput Agreement substantially in the form
                  of Exhibit F attached hereto.

                  (e) All of the transactions identified in this Section 5 shall
         occur simultaneously, and none shall be deemed completed until all are
         completed. Unless otherwise expressly provided for herein, all
         transfers of assets and liabilities, as well as all other actions
         related to the Closing, shall be deemed to have occurred at 12:01 a.m.,
         Central Time, on the Closing Date.

         6. SELLER'S REPRESENTATIONS AND WARRANTIES. Subject to the exceptions,
disclaimers and other matters set forth in this Section 6 and in Section 8
below, the matters set forth on the Schedules to this Agreement and any other
written disclosures made to Buyer at any time prior to the Closing Date, Seller
hereby represents and warrants to Buyer as of the date of this Agreement and as
of the Closing Date (except with respect to those representations and warranties
that speak as to a particular date or time, which need only be true and correct
as of such date or time) as set forth below. For purposes of this Agreement,
"knowledge," when used in the phrase "Seller's knowledge" in this Agreement
means, and shall be limited to, the actual knowledge (without independent
investigation) of the manager of the Refinery and the individuals acting as his
or her direct reports as of the date of this Agreement. Buyer understands that
none of such individuals is making any representations or warranties to Buyer
and that such individuals shall have no liability to Buyer in connection with
the matters covered in this Section 6.

                  (a) Organization and Good Standing. BP is a corporation duly
         organized, validly existing and in good standing under the laws of the
         State of Indiana. Amoco is a corporation duly organized, validly
         existing and in good standing under the laws of the State of Maryland.


                                      -16-
   28

                  (b) Authority. Seller has the corporate power and authority to
         enter into this Agreement and the transactions contemplated hereby and
         to carry out its obligations hereunder. The execution, delivery and
         performance of this Agreement and the transactions contemplated hereby
         have been duly authorized and this Agreement has been duly executed and
         delivered by Seller and constitutes a valid and binding agreement of
         Seller enforceable against Seller in accordance with its terms, except
         as such enforceability is limited by general principles of equity and
         applicable provisions of bankruptcy, insolvency, moratorium,
         reorganization or similar laws.

                  (c) Consents. Other than with respect to (i) the H-S-R Act,
         (ii) obtaining the consents required in connection with certain
         agreements, contracts, licenses, leases, easements, rights-of-way and
         permits and (iii) Buyer's execution of a modification to the Project
         Sunshine Consent Decree and the filing thereof with the U.S. District
         Court upon Closing, in accordance with the terms and conditions of
         paragraph six of the Project Sunshine Consent Decree, no consent,
         approval of or by, or filing with or notice to any other individual,
         corporation, partnership, association, trust, limited liability company
         or any other entity or organization, including a government or
         political subdivision or agency, unit or instrumentality thereof (a
         "Person") is required with respect to Seller in connection with the
         execution, delivery or enforceability of this Agreement or the
         consummation of the transactions provided for hereby, except where the
         failure to obtain such consent or approval, make such filing or give
         such notice would not have a material adverse effect on the Business,
         taken as a whole, as it is currently operated by Seller.

                  (d) No Breach. Subject to obtaining the consents required in
         connection with certain agreements, contracts, licenses, leases,
         easements, rights-of-way and permits and except for such matters as
         would not have a material adverse effect on the Business, taken as a
         whole, as it is currently operated by Seller, the execution and
         delivery of this Agreement and the consummation of the transactions
         contemplated hereby and the compliance by Seller with any of the
         provisions hereof does not and will not (i) violate or conflict with,
         or result in a breach of, any provisions of, or constitute a default
         (or an event which, with notice or lapse of time or both, would
         constitute a default) under, or result in termination of, or accelerate
         the performance required by, or result in the creation of any lien or
         other encumbrance upon the Purchased Assets under any of the terms,
         conditions or provisions of the Certificate of Incorporation or By-Laws
         of Seller or under any material agreement, instrument or obligation to
         which Seller is a party, or by which the Purchased Assets are otherwise
         bound, or (ii) violate any order, injunction, judgment, decree or
         award, federal, state, local or foreign law, ordinance, statute, rule
         or regulation.

                  (e) Real Property.

                           (i) Title to the Real Property is owned in fee by
                  Seller and, when transferred to Buyer, shall be good and
                  marketable, free and clear of all liens and encumbrances,
                  except for: (A) such items as are set forth on Schedule
                  6(e)(i)

                                      -17-
   29
                  attached hereto or the other Schedules attached hereto; (B)
                  mechanics', carriers', workmen's, repairmen's or other like
                  liens arising or incurred in the ordinary course of business,
                  liens arising under original purchase price conditional sales
                  contracts and equipments leases with third parties entered
                  into in the ordinary course of business, liens for taxes and
                  other governmental charges which are not due and payable or
                  which may thereafter be paid without penalty or which are
                  being contested in good faith and liens relating to
                  environmental or safety conditions; (C) other imperfections of
                  title, restrictions or encumbrances, if any, which
                  imperfections of title, restrictions or encumbrances do not,
                  individually or in the aggregate, materially adversely impair
                  the continued use and operation of the assets to which they
                  relate in the operation of the Business as currently conducted
                  by Seller; (D) easements, covenants, conditions,
                  rights-of-way, minor title exceptions and other similar
                  restrictions; (E) any conditions that would be shown on an
                  accurate survey or upon a personal inspection of the Real
                  Property; (F) existing leases, licenses and similar
                  agreements; (G) zoning, building, fire, health, environmental
                  and pollution control laws, ordinances, rules and safety
                  regulations and other similar restrictions; (H) the rights of
                  the owners of outstanding oil, gas and mineral interests
                  and/or their lessees, to explore for, drill, produce and
                  develop said oil, gas and minerals owned by them in, on and
                  under said lands, together with the right to use as much of
                  the surface of said lands as is reasonably necessary to
                  exercise their rights to explore for and extract said oil, gas
                  and minerals from said lands; (I) the exposure restrictions
                  contained in the deeds attached hereto as Exhibit C; and (J)
                  acts done or suffered to be done by, and judgments against,
                  Buyer and those claiming by, through or under Buyer
                  (collectively, (A) through (J) are referred to herein as the
                  "Permitted Liens").

                           (ii) Subject to the Disclosed Environmental
                  Liabilities, to Seller's knowledge, all water, sewer, gas,
                  steam, electric, telephone and drainage facilities and all
                  other utilities necessary for the operation of the Business as
                  it is currently operated by Seller are adequately available to
                  service the Real Property.

                           (iii) To Seller's knowledge, the Real Property has
                  access to a public street adjoining the Real Property, and
                  such access is not dependent on any land or other real
                  property interest which is not included in the Real Property.

                           (iv) There are no Permitted Liens that would have a
                  material adverse effect on the Business, taken as a whole, as
                  it is currently operated by Seller.

                  (f) Brokers. Seller has not retained any broker or finder or
         incurred any liability or obligation for any brokerage fees,
         commissions, finder's fees or similar compensation with respect to this
         Agreement or the transactions contemplated hereby, except pursuant to
         an agreement with Rothschild Inc., for which Seller or another member
         of the BP Group will be solely responsible.


                                      -18-
   30

                  (g) Machinery and Equipment. Other than with respect to items
         leased from third parties, Seller has, and as of the Closing Buyer will
         have, valid title to all major items of machinery and equipment
         included in the Purchased Assets free and clear of all liens and
         encumbrances, except for Permitted Liens.

                  (h) Compliance With Laws. To Seller's knowledge, other than
         with respect to Health, Safety and Environmental Laws (which are
         addressed in Section 7), the Purchased Assets are in compliance in all
         material respects with all laws, governmental regulations, orders and
         decrees, as they are currently enforced with respect to the operation
         of the Business by Seller, except for violations, non-compliance or
         other matters, if any, which would not have a material adverse effect
         on the operation of the Business, taken as a whole, as it is currently
         operated by Seller.

                  (i) Permits. Seller possesses all Permits, licenses and
         governmental approvals necessary for the operation of the Business,
         taken as a whole, as it is currently operated by Seller, except (i) for
         Environmental Permits (which are addressed in Section 7) and (ii) for
         such Permits, licenses and other governmental approvals the failure to
         possess would not, individually or in the aggregate, have a material
         adverse effect on the Business, taken as a whole, as it is currently
         operated by Seller.

                  (j) Intellectual Property.

                           (i) BP-Group-Owned Process Technology. Seller or
                  another member of the BP Group has the right to use, and to
                  license to Buyer pursuant to the Technology Agreement, the
                  material BP Group-owned process technology that is used in and
                  necessary for the operation of the Business as it is currently
                  operated by Seller, except for any technology which would not
                  have a material adverse effect on the operation of the
                  Business, taken as a whole, as it is currently operated by
                  Seller.

                           (ii) Non-BP Group-Owned Process Technology. Schedule
                  1(l) attached hereto contains a true, correct and complete
                  list of all material process technology (which does not
                  include software and related intellectual property matters)
                  not owned by the BP Group that is used in and necessary for
                  the operation of the Business as it is currently operated by
                  Seller. To Seller's knowledge, Seller has not received any
                  notices of, and is not aware of any facts that indicate a
                  likelihood of, any infringement by Seller of any of such
                  non-BP Group-owned process technology rights due to the
                  operation of the Business as it is currently operated by
                  Seller.

                  (k) Actions and Proceedings. Except for such matters as would
         not have a material adverse effect on the operation of the Business,
         taken as a whole, as it is currently operated by Seller, and except as
         set forth on the Schedules attached hereto:



                                      -19-
   31

                           (i) there is no action, suit, arbitration proceeding
                  or claim pending, or , to Seller's knowledge, threatened
                  against Seller and/or any other member of the BP Group
                  involving or affecting the Purchased Assets, and, other than
                  Permitted Liens, except as set forth in Section 7, there are
                  no decrees, injunctions, liens, orders or judgments of or with
                  any court or governmental department or agency outstanding
                  against Seller and/or any other member of the BP Group
                  relating to or affecting the Purchased Assets;

                           (ii) no action, suit, arbitration or regulatory
                  proceeding is pending or, to Seller's knowledge, threatened
                  seeking to restrain or prohibit this Agreement or any
                  agreement, instrument or transaction contemplated hereby, or
                  to obtain damages, a discovery order or other relief in
                  connection with this Agreement or the transactions
                  contemplated hereby; and

                           (iii) there is no pending or, to Seller's knowledge,
                  threatened condemnation or other governmental taking of any of
                  the Real Property included in the Purchased Assets.

                  (l) Collective Bargaining Agreements. Schedule 6(l) attached
         hereto sets forth each collective bargaining agreement, contract
         extension agreement, memorandum of agreement and letter of
         understanding by or to which any of the Union Employees (as defined in
         Section 11(a)) is covered or subject.

                  (m) Assets. Except for (i) assets disposed of in the ordinary
         course of business subsequent to the date hereof, (ii) Excluded Assets,
         (iii) pipeline rights of way, permits, licenses and other property
         rights, and (iv) assets set forth on Schedule 6(m), the Purchased
         Assets and the assets, properties and rights provided to Buyer pursuant
         to this Agreement and the other agreements contemplated hereby, include
         all material assets, other than the intellectual property assets and
         leases and licenses and other contracts that are not transferable, and
         which are reasonably required to operate the Business immediately
         following the Closing Date substantially in the manner in which the
         Business is currently conducted by Seller, except for such assets the
         failure of which to include would not individually or in the aggregate,
         have a material adverse effect on the Business, taken as a whole, as it
         is currently operated by Seller.

                  (n) Tangible Assets. The Purchased Assets, excluding all
         rights-of-way, permits, licenses, leases and other rights of access
         relating to the Product Pipelines, are free from material defects, have
         been maintained substantially in accordance with normal industry
         practice, and are in substantially good operating condition and repair
         for their age (taking account of their nature, normal wear and tear and
         continued repair and replacement in accordance with Seller's past
         practice).


                                      -20-
   32
         7. ENVIRONMENTAL MATTERS.

                  (a) Environmental Representations and Warranties. Subject to
         the exceptions, disclaimers and other matters set forth in Section 6
         above and Section 8 below, the matters set forth on the Schedules
         attached hereto, the Disclosed Environmental Liabilities and any other
         written disclosures made to Buyer at any time prior to the Closing
         Date, to Seller's knowledge, as of the date hereof and as of the
         Closing Date:

                           (i) all Environmental Permits necessary for the
                  operation of the Business as it is currently operated by
                  Seller have been obtained and are in effect and, where
                  applicable, applications for renewal thereof have been timely
                  filed, except where the failure to obtain such Environmental
                  Permits or have them in effect or file for such renewals would
                  not, individually or in the aggregate, have a material adverse
                  effect on the Business, taken as a whole, as it is currently
                  operated by Seller;

                           (ii) all environmental control equipment necessary
                  for the operation of the Business as it is currently operated
                  by Seller is in substantial compliance with Health, Safety and
                  Environmental Laws, as they are currently enforced with
                  respect to the operation of the Business by Seller, is
                  installed at the Business, and such equipment is operating in
                  a manner sufficient to achieve and maintain such compliance
                  under normal operating conditions, except where the failure to
                  be in such compliance would not have a material adverse effect
                  on the Business, taken as a whole, as it is currently operated
                  by Seller; and

                           (iii) there are no existing or known violations of
                  Health, Safety and Environmental Laws, as they are currently
                  enforced with respect to the operation of the Business by
                  Seller, which, individually or in the aggregate, would have a
                  material adverse effect on the Business, taken as a whole, as
                  it is currently operated by Seller.

                  (b) Limitation. The representations and warranties set forth
         in this Section 7 represent the sole and exclusive representations and
         warranties of Seller with respect to health, safety or environmental
         matters, including any matters arising under or relating to Health,
         Safety and Environmental Laws.

         8. DISCLAIMERS. EXCEPT AS OTHERWISE EXPRESSLY SET FORTH IN THIS
AGREEMENT AND THE INSTRUMENTS, DOCUMENTS AND AGREEMENTS REFERRED TO HEREIN OR
EXECUTED IN CONNECTION WITH THE TRANSACTIONS CONTEMPLATED HEREBY:

                  (a) NEITHER SELLER NOR ANY OTHER MEMBER OF THE BP GROUP MAKES
         ANY REPRESENTATIONS OR WARRANTIES OF ANY KIND OR NATURE, EXPRESS OR
         IMPLIED, AT LAW OR IN EQUITY, WITH RESPECT TO ITSELF, THE BUSINESS, THE
         REFINERY, THE PURCHASED ASSETS, THE


                                      -21-
   33

         ASSUMED LIABILITIES OR ANY PORTION THEREOF, AND SELLER AND THE OTHER
         MEMBERS OF THE BP GROUP EXPRESSLY DISCLAIM ANY IMPLIED WARRANTIES,
         INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
         PARTICULAR PURPOSE OR ORDINARY PURPOSE OR ANY REPRESENTATION OR
         WARRANTY AS TO VALUE;

                  (b) THE PURCHASED ASSETS, INCLUDING THE BUSINESS AND ANY OTHER
         ASSETS TRANSFERRED TO BUYER PURSUANT TO THE TERMS AND CONDITIONS OF
         THIS AGREEMENT ARE BEING TRANSFERRED "AS IS, WHERE IS"AND "WITH ALL
         FAULTS" AND BUYER SHALL RELY UPON ITS OWN EXAMINATION THEREOF;

                  (c) NEITHER SELLER NOR ANY OTHER MEMBER OF THE BP GROUP MAKES
         ANY REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE CONDITION OF THE
         BUSINESS, INCLUDING ANY OF THE PURCHASED ASSETS, THE MERCHANTABILITY OF
         THE BUSINESS, INCLUDING THE PURCHASED ASSETS, THE FITNESS OF ANY ASSETS
         FOR ANY PURPOSE OR THE ASSIGNABILITY, COMPLETENESS OR CONTIGUITY OF
         PIPELINE RIGHTS OF WAY, PERMITS, LICENSES AND OTHER PROPERTY RIGHTS,
         AND SELLER AND THE OTHER MEMBERS OF THE BP GROUP EXPRESSLY DISCLAIM ANY
         AND ALL SUCH REPRESENTATIONS AND WARRANTIES OF ANY KIND OR NATURE;

                  (d) BUYER EXPRESSLY ACKNOWLEDGES THAT NONE OF SELLER, ANY
         OTHER MEMBER OF THE BP GROUP OR ANY OTHER PERSON HAS MADE ANY
         REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, AT LAW OR IN EQUITY, AS
         TO THE ACCURACY OR COMPLETENESS OF ANY INFORMATION REGARDING THE
         BUSINESS, THE PURCHASED ASSETS OR THE ASSUMED LIABILITIES, EXCEPT AS
         EXPRESSLY SET FORTH IN THIS AGREEMENT OR THE SCHEDULES HERETO, AND
         BUYER FURTHER AGREES THAT NONE OF SELLER, ANY OTHER MEMBER OF THE BP
         GROUP OR ANY OTHER PERSON SHALL HAVE OR BE SUBJECT TO ANY LIABILITY TO
         BUYER OR ANY OTHER PERSON RESULTING FROM THE DISTRIBUTION TO BUYER, OR
         BUYER'S USE OF, ANY SUCH INFORMATION, INCLUDING THE CONFIDENTIAL
         INFORMATION MEMORANDUM, DATED AS OF FEBRUARY 2001 (THE "OFFERING
         MEMORANDUM"), AND ANY INFORMATION, DOCUMENT OR MATERIAL MADE AVAILABLE
         TO BUYER IN CERTAIN "DATA ROOMS," MANAGEMENT PRESENTATIONS OR ANY OTHER
         FORM IN EXPECTATION OF THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT;
         AND

                                      -22-
   34


                  (e) BUYER EXPRESSLY ACKNOWLEDGES THE DISCLAIMERS OF SELLER AND
         THE OTHER MEMBERS OF THE BP GROUP, INCLUDING (I) THOSE SET FORTH IN
         SECTIONS 8(a), 8(b), 8(c) AND 8(d) ABOVE AND (II) THAT THERE ARE
         UNCERTAINTIES INHERENT IN ANY ESTIMATES, PROJECTIONS AND OTHER
         FORECASTS AND PLANS PROVIDED BY SELLER AND OTHER MEMBERS OF THE BP
         GROUP TO BUYER, INCLUDING ANY SUCH INFORMATION CONTAINED IN THE
         OFFERING MEMORANDUM, THAT BUYER IS AWARE OF AND FAMILIAR WITH SUCH
         UNCERTAINTIES AND THAT BUYER TAKES FULL RESPONSIBILITY FOR MAKING ITS
         OWN EVALUATION OF THE ADEQUACY AND ACCURACY OF ANY SUCH ESTIMATES,
         PROJECTIONS AND OTHER FORECASTS AND PLANS (INCLUDING THE REASONABLENESS
         OF THE ASSUMPTIONS UNDERLYING SUCH ESTIMATES, PROJECTIONS AND
         FORECASTS) IN CONNECTION WITH THE TRANSACTIONS CONTEMPLATED BY THIS
         AGREEMENT. ACCORDINGLY, NEITHER SELLER NOR ANY OTHER MEMBER OF THE BP
         GROUP MAKES ANY REPRESENTATIONS OR WARRANTIES WITH RESPECT TO SUCH
         ESTIMATES, PROJECTIONS AND OTHER FORECASTS AND PLANS (INCLUDING THE
         REASONABLENESS OF THE ASSUMPTIONS UNDERLYING SUCH ESTIMATES,
         PROJECTIONS AND FORECASTS). BUYER ACKNOWLEDGES THAT IT HAS HAD
         SUFFICIENT OPPORTUNITY TO MAKE WHATEVER INVESTIGATION IT HAS DEEMED
         NECESSARY AND ADVISABLE FOR PURPOSES OF DETERMINING WHETHER OR NOT TO
         ENTER INTO THIS AGREEMENT.

         9. BUYER'S REPRESENTATIONS AND WARRANTIES. Buyer hereby represents and
warrants to Seller as of the date of this Agreement and as of the Closing Date
(except with respect to those representations and warranties that speak as to a
particular date or time, which need only be true and correct as of such date or
time) as set forth below:

                  (a) Organization and Good Standing. Buyer is a corporation
         duly organized, validly existing and in good standing under the laws of
         the State of Delaware.

                  (b) Authority of Buyer. Buyer has the corporate power and
         authority to enter into this Agreement and the transactions
         contemplated hereby and to carry out its obligations hereunder. The
         execution, delivery and performance of this Agreement and the
         transactions contemplated hereby have been duly authorized and this
         Agreement has been duly executed and delivered by Buyer and constitutes
         a valid and binding agreement of Buyer enforceable against Buyer in
         accordance with its terms, except as such enforceability is limited by
         general principles of equity and applicable provisions of bankruptcy,
         insolvency, moratorium, reorganization or similar laws.

                  (c) Consents. Other than with respect to the H-S-R Act, no
         consent, approval of or by, or filing with or notice to any other
         Persons is required with respect to Buyer in

                                      -23-
   35
         connection with the execution, delivery or enforceability of this
         Agreement or the consummation of the transactions provided for hereby.

                  (d) No Breach. The execution and delivery of this Agreement
         and the consummation of the transactions contemplated hereby and the
         compliance by Buyer with any of the provisions hereof does not and will
         not: (i) violate or conflict with, or result in a breach of, any
         provisions of, or constitute a default (or an event which, with notice
         or lapse of time or both, would constitute a default) under, or result
         in termination of, or accelerate the performance required by any of the
         terms, conditions or provisions of the Certificate of Incorporation or
         By-Laws or other organizational documents of Buyer or under any
         material agreement, instrument or obligation to which Buyer is a party
         or (ii) violate any order, injunction, judgment, decree or award,
         federal, state, local or foreign law, ordinance, statute, rule or
         regulation.

                  (e) Litigation. No action, suit, arbitration or regulatory
         proceeding is pending or, to Buyer's knowledge, threatened seeking to
         restrain or prohibit this Agreement, or any agreement, instrument or
         transaction contemplated hereby, or to obtain damages, a discovery
         order or other relief in connection with this Agreement or the
         transactions contemplated hereby.

                  (f) Brokers. Buyer has not retained any broker or finder or
         incurred any liability or obligation for any brokerage fees,
         commissions, finders' fees or similar compensation with respect to this
         Agreement or the transactions contemplated hereby, except pursuant to
         an arrangement with Lehman Brothers Inc., for which Buyer is solely
         responsible.

                  (g) Availability of Funds. Buyer has cash available to enable
         it to consummate the transactions contemplated by this Agreement, to
         operate the Business for the reasonably foreseeable future and to meet
         the Business's financial obligations as such are presently known or
         reasonably anticipated.

                  (h) No Knowledge of Misrepresentations or Omissions. Buyer has
         no knowledge that any representation or warranty of Seller in this
         Agreement or any agreement contemplated hereby is not true and correct
         in all material respects, and Buyer has no knowledge of any material
         errors in, or material omissions from, the Schedules to this Agreement
         or the schedules, exhibits or attachments to any agreement contemplated
         hereby.

         10. COVENANTS.

                  (a) Covenants of Seller. Seller covenants and agrees as
         follows:

                           (i) Access and Information. Subject to the provisions
                  of the letter agreement between Buyer and Seller with respect
                  to confidentiality dated on or about December 12, 2000 (the
                  "Confidentiality Agreement") and upon reasonable notice,

                                      -24-
   36

                  Seller shall grant, or cause to be granted to, Buyer access
                  during normal business hours throughout the period between the
                  date of this Agreement and the Closing Date to the Business
                  and the books and records and other information relating to
                  the operations of the Business. During this period, Seller
                  shall use all commercially reasonable efforts to furnish, or
                  cause to be furnished to, Buyer and its representatives all
                  data and information concerning the Business (the "Data") and
                  concerning operations of the Business which may reasonably be
                  requested by Buyer and shall use all commercially reasonable
                  efforts to make available, or cause to be made available, such
                  personnel of Seller as may reasonably be requested for the
                  furnishing of such Data. During this period, Buyer shall not
                  contact or communicate with any employees, customers,
                  suppliers or distributors of the Business without Seller's
                  prior written consent. Buyer shall indemnify and hold Seller
                  and its affiliates harmless against any and all Losses
                  suffered in connection with the exercise of Buyer's rights
                  under this Section 10(a)(i). Notwithstanding any provision in
                  this Agreement to the contrary, Buyer's obligations under this
                  Section 10(a)(i) shall survive the termination of this
                  Agreement and the consummation of the transactions
                  contemplated hereby.

                           (ii) Conduct of Business. Except as provided on the
                  Schedules attached hereto, Seller shall: operate the Business
                  in the ordinary course of business consistent with past
                  practice or as described in the Offering Memorandum; use
                  commercially reasonable efforts to maintain satisfactory
                  relationships with employees, suppliers, distributors,
                  customers, collective bargaining units and others having
                  business relationships with the Business; use commercially
                  reasonable efforts to maintain the Purchased Assets in
                  reasonably good operating condition, normal wear and tear
                  excepted; maintain its inventory of supplies, parts and other
                  materials and inventories and keep its books of account
                  records and files, in each case in the ordinary course of
                  business consistent with past practice; refrain from (A)
                  amending, modifying, waiving any rights under or terminating
                  (or allowing to terminate) any material contract, except in
                  the ordinary course of business, (B) disposing of,
                  encumbering, selling or otherwise transferring any of the
                  material assets constituting Purchased Assets or other rights
                  of the Business, except sales of inventory in the ordinary
                  course of business, (C) commencing any new capital projects or
                  making any additional commitments for capital expenditures
                  relating to the Business in excess of Five Hundred Thousand
                  Dollars ($500,000) in the aggregate, except in connection with
                  certain scheduled turnarounds, and except as reasonably
                  required to comply with the Project Sunshine Consent Decree or
                  (D) granting or agreeing to grant any bonus to any employees
                  of the Business, except for any bonus approved prior to the
                  date hereof or made in the ordinary course of business, or
                  enter into any contract of employment involving aggregate
                  annual salary in excess of Two Hundred Thousand Dollars
                  ($200,000), collective bargaining agreement or other labor
                  contract with respect to any such employees outside the
                  ordinary course of business; provided that

                                      -25-
   37
                  Seller may take any action to which Buyer consents (which
                  consent shall not be unreasonably withheld taking account of
                  Buyer's and Seller's commercial objectives with respect to the
                  Purchased Assets).

                           (iii) Schedules.

                                 (A)   Prior to the Closing Date, Seller shall
                                       notify Buyer of additions or changes to
                                       the Schedules to this Agreement required
                                       to reflect events since the date of this
                                       Agreement or facts discovered by Seller
                                       after the date hereof, so as to cause
                                       Seller's representations and warranties
                                       contained herein (other than any which
                                       speak as to a particular date) to be true
                                       and correct in all material respects as
                                       of the Closing Date. Notices given by
                                       Seller pursuant to this Section
                                       10(a)(iii) will be deemed to have amended
                                       the Schedules, to have qualified the
                                       representations and warranties contained
                                       in Sections 6 and 7, and to have
                                       corrected any misrepresentation or breach
                                       of warranty that otherwise might have
                                       existed hereunder by reason of the fact,
                                       circumstance, event or development (with
                                       the result that no misrepresentation or
                                       breach shall be deemed to have occurred),
                                       in each case to the extent of the
                                       disclosure contained in such notice,
                                       including for purposes of Section 12(b).

                                 (B)   If such additions or changes would have a
                                       material adverse effect on the Business,
                                       taken as a whole, as it is currently
                                       operated by Seller, the parties shall
                                       negotiate in good faith to determine a
                                       reasonable adjustment to the Purchase
                                       Price to fully reflect any Losses
                                       actually incurred by Buyer resulting from
                                       such matters. For purposes of this
                                       Section 10(a)(iii) only, such additions
                                       or changes shall be deemed to have a
                                       material adverse effect on the Business
                                       only if such adverse effect exceeds Ten
                                       Million Dollars ($10,000,000).

                                 (C)   In the event that the parties hereto are
                                       unable to agree upon an adjustment to the
                                       Purchase Price prior to the Closing Date,
                                       each party agrees that the Closing will
                                       take place without delay as set forth in
                                       this Agreement and the Buyer shall pay
                                       the full purchase price. The Parties
                                       further agree, upon the demand of any
                                       party, to submit the need for, and size
                                       of, any adjustment to the Purchase Price
                                       to binding arbitration. A party desiring
                                       to submit to arbitration any such matter
                                       shall

                                      -26-
   38

                                       furnish its demand for arbitration in
                                       writing to the other party within a ten
                                       (10) day period commencing on the
                                       Closing Date. The arbitration shall be
                                       conducted before three (3) arbitrators
                                       who are experienced in matters
                                       pertaining to the oil refining industry.
                                       The arbitrators shall not be a past or
                                       present officer, director or employee of
                                       any party or any of its affiliates. The
                                       arbitration shall be governed by the
                                       Commercial Arbitration Rules of the
                                       American Arbitration Association. Should
                                       the arbitrators render a decision in
                                       favor of the Buyer for an adjustment in
                                       the Purchase Price, Seller shall pay to
                                       Buyer such amount plus interest from the
                                       Closing Date through and including the
                                       date payment is made at a rate of 4% per
                                       annum.

                           (iv) Confidentiality. After the Closing, Seller shall
                  maintain the confidentiality of all information, documents and
                  materials relating exclusively to the Business, including all
                  such materials which remain in the possession of Seller,
                  except to the extent that disclosure of any such information
                  is requested or required by law (by oral questions,
                  interrogatories, requests for information or other documents
                  in legal proceedings, subpoena, civil investigative demand or
                  any other similar legal process) or legal or administrative
                  process or authorized by Buyer or reasonably occurs in
                  connection with disputes over the terms of this Agreement. The
                  provisions of this Section 10(a)(iv) shall not apply to any
                  information, documents or materials which are in the public
                  domain or shall come into public domain, other than by reason
                  of a breach by the Seller of its obligations hereunder.
                  Furthermore, notwithstanding the foregoing, Seller shall be
                  permitted to disclose any confidential information (i) to any
                  other member of the BP Group or (ii) as required to operate
                  Seller's ongoing business, provided such member shall comply
                  with the terms of this Section 10(a)(iv).

                           (v) Sale of North Dakota Core Pipeline Interest.

                               (A)   The owner of the assets (the "Pipeline
                                     Assets") to be conveyed by the Asset
                                     Purchase Agreement by and between Buyer and
                                     Seller dated July 16, 2001 relating to the
                                     purchase and sale of the North Dakota
                                     Pipeline Interest and Related Assets (the
                                     "Pipeline Purchase Agreement"), whether
                                     such owner is Seller or any third party
                                     (such third party, the "Third Party
                                     Buyer"), shall continue to operate the
                                     Pipeline Interest (as defined in the
                                     Pipeline Purchase Agreement) in a manner
                                     substantially similar to the manner such
                                     Pipeline Interest is currently operated by
                                     the BP Group, including operating

                                      -27-
   39

                                     trunklines in the same flow direction and
                                     transporting, at a minimum, the same types
                                     of crude oil, and shall use all of the
                                     Pipeline Assets to transport substantially
                                     the same number of barrels of crude per
                                     day, subject to adjustment downward in the
                                     event of a reduction in the availability of
                                     field production to the Refinery; provided,
                                     however, that such obligations shall not
                                     survive the seventh anniversary of the
                                     Closing Date.

                               (B)   The owner of the Pipeline Assets, whether
                                     such owner is Seller or any Third Party
                                     Buyer, shall not take any action to
                                     initiate or in any way support any increase
                                     in the tariff rate for use of the Pipeline
                                     Assets prior to the seventh anniversary of
                                     the Closing Date.

                               (C)   If Buyer does not purchase the Pipeline
                                     Assets and Seller executes a definitive
                                     agreement to sell the Pipeline Assets to a
                                     Third Party Buyer, Seller shall require the
                                     Third Party Buyer to agree in writing for
                                     the benefit of Buyer to the provisions of
                                     this Section 10(a)(v).

                               (D)   Notwithstanding any other provision of this
                                     Agreement (including Section 15(i)), any
                                     claim by the Buyer Indemnified Party for
                                     indemnity arising under this Section
                                     10(a)(v) shall be brought within two (2)
                                     years after the expiration of Seller's
                                     obligations under this Section 10(a)(v).
                                     A claim shall be deemed to have been
                                     brought only upon delivery of a proper
                                     Indemnification Notice to the other party
                                     at the notice address set forth in
                                     Section 20. Any claim required to be made
                                     within the time period set forth in this
                                     Section 10(a)(v) not so timely made shall
                                     be forever barred.

                  (b) Covenants of Buyer. Buyer covenants and agrees as follows:

                           (i) Confidentiality.

                               (A)   Buyer acknowledges that all information
                                     provided to any of it and its affiliates,
                                     directors, officers, employees, counsel,
                                     auditors, accountants, agents, advisors and
                                     other representatives by Seller and other
                                     members of the BP Group and their
                                     respective directors, officers, employees,
                                     counsel, auditors, accountants, agents,
                                     advisors and other representatives is
                                     subject to the terms of the Confidentiality

                                      -28-
   40
                                     Agreement, the terms of which are hereby
                                     incorporated herein by reference. Effective
                                     upon, and only upon, the Closing, the
                                     Confidentiality Agreement shall terminate
                                     only with respect to information provided
                                     to any of Buyer and its affiliates,
                                     directors, officers, employees, counsel,
                                     auditors, accountants, agents, advisors and
                                     other representatives that relates solely
                                     to the Business, the Purchased Assets and
                                     the Assumed Liabilities; provided that
                                     Buyer acknowledges that any and all
                                     information provided or made available to
                                     any of it and its affiliates, directors,
                                     officers, employees, counsel, auditors,
                                     accountants, agents, advisors and other
                                     representatives by or on behalf of Seller
                                     (other than information relating solely to
                                     the Purchased Assets and the Assumed
                                     Liabilities) shall remain subject to the
                                     terms and conditions of the Confidentiality
                                     Agreement on and after the Closing Date.

                               (B)   Buyer agrees that, from and after the
                                     Closing Date, Buyer shall, and shall cause
                                     its affiliates, directors, officers,
                                     employees, counsel, auditors, accountants,
                                     agents, advisors and other representatives
                                     to, keep the Seller Information
                                     confidential following the Closing Date,
                                     except to the extent that disclosure of any
                                     such Seller Information is requested or
                                     required by law (by oral questions,
                                     interrogatories, requests for information
                                     or other documentation in legal
                                     proceedings, subpoena, civil investigative
                                     demand or any other similar legal process)
                                     or legal or administrative process or
                                     authorized by Seller or reasonably occurs
                                     in connection with disputes over the terms
                                     of this Agreement. The provisions of this
                                     Section 10(b)(i)(B) shall not apply to any
                                     information, documents or materials which
                                     are in the public domain or shall come into
                                     the public domain, other than by reason of
                                     a breach by Buyer of its obligations
                                     hereunder or under the Confidentiality
                                     Agreement. Furthermore, notwithstanding the
                                     foregoing, Buyer shall be permitted to
                                     disclose the Seller Information to any of
                                     its affiliates, provided such affiliate
                                     shall comply with the terms of this Section
                                     10(b)(i)(B). In connection with the
                                     Transferred Employees, Buyer shall use
                                     commercially reasonable efforts, at
                                     Seller's request and at Buyer's expense, to
                                     enforce existing confidentiality agreements
                                     and rights requiring employees to keep
                                     trade secrets confidential. For purposes of
                                     this Agreement, "Seller Information" shall
                                     mean all information concerning Seller


                                      -29-
   41
                                     and/or any other member of the BP Group,
                                     other than information that relates
                                     exclusively to the Business, the
                                     Purchased Assets and the Assumed
                                     Liabilities and other than any such
                                     information that is available to the
                                     public on the Closing Date, or thereafter
                                     becomes available to the public, other
                                     than as a result of a breach of this
                                     Section 10(b)(i).

                           (ii) Notification. From the date hereof through and
                  including the Closing Date, Buyer shall promptly notify Seller
                  if Buyer obtains knowledge that any representation or warranty
                  of Seller in this Agreement or any agreement contemplated
                  hereby or information set forth in the Schedules hereto is not
                  true and correct in all material respects, or if Buyer obtains
                  knowledge of any material errors in, or omissions from, the
                  Schedules to this Agreement.

                           (iii) Litigation. With respect to all litigation and
                  other matters set forth on the Schedules attached hereto and
                  any other matters that constitute Excluded Liabilities and for
                  so long as Seller is contesting or defending such matter,
                  Buyer shall cooperate in all respects with Seller and other
                  members of the BP Group and their respective counsel in their
                  efforts to conduct or resolve such litigation, including by
                  making available to them such documents and witnesses as may
                  be deemed necessary or useful therefor in Seller's sole but
                  reasonable discretion. With respect to any dispute or
                  litigation involving any terminated Employee seeking
                  reinstatement, Buyer shall take such actions as are necessary
                  for Seller to comply with the terms of any judgment, decision
                  or order of any proper authority issued in connection with
                  such dispute or litigation (including by offering to employ
                  such former Employee) and shall treat any former Employee who
                  is ordered to be reinstated as a Transferred Employee for all
                  purposes hereunder.

                           (iv) Title Policies. Buyer may procure, and shall pay
                  the cost of the premium for commitments or policies from title
                  insurance companies to provide owner's title insurance
                  policies with respect to the portions of the Purchased Assets
                  constituting real property, provided, however, that Buyer's
                  ability or inability to obtain title insurance (and without
                  regard to (i) any exceptions contained therein and (ii) any
                  title insurance premium Buyer is required to pay in order to
                  obtain such title insurance) on such real property for any
                  reason shall not cause there to be an adjustment to the
                  Purchase Price and shall not cause the Closing of the
                  transactions contemplated by this Agreement to be delayed.

                           (v) Removal of Seller Marks. Buyer agrees that,
                  within three (3) months after the Closing Date, Buyer shall
                  (i) remove, obliterate, cover or replace, as appropriate, all
                  signs, billboards, containers, drums, advertisements or other
                  media containing any service marks, trade names, trade dress
                  or other indicia of origin of


                                      -30-
   42
                  Seller or any member of the BP Group, including the words
                  "Amoco" and "Standard," any items that include the words
                  "Amoco" or "Standard," the BP Group torch and oval design, the
                  letters "BP," any items that include the word "BP," the phrase
                  "BP Oil," the BP Group shield or the BP Group Helios logo or
                  variants thereof located on or appurtenant to any of the
                  Purchased Assets, including signs, billboards and
                  advertisements or other media located at the Business and (ii)
                  return to Seller or, at Seller's option, destroy (and certify
                  such destruction to Seller) all items and materials, including
                  stationery, letterhead and purchase orders, located at any of
                  the Purchased Assets containing the above described marks.

                           (vi) Project Sunshine Consent Decree. Buyer
                  represents and warrants that it has received a copy of the
                  Project Sunshine Consent Decree and that it has the financial
                  and technical capability to assume the obligations set forth
                  in the Project Sunshine Consent Decree with respect to the
                  Purchased Assets. Buyer covenants and agrees that prior to or
                  at the Closing it will execute and deliver a modification to
                  the Project Sunshine Consent Decree, in a form satisfactory to
                  Seller and the United States of America, pursuant to which
                  Buyer shall agree to be bound by the terms and conditions of
                  the Project Sunshine Consent Decree applicable to the
                  Purchased Assets, and Buyer further covenants and agrees that
                  from and after the Closing Date it shall comply in all
                  respects with those provisions of the Project Sunshine Consent
                  Decree (including any amendments, supplements or revisions
                  thereto) relating to the operation, maintenance, insurance,
                  and use of the Refinery and the Business and assume all costs
                  and expenses associated therewith, and Buyer shall be
                  responsible and liable for all costs and expenses arising from
                  or relating in any way to compliance with the Project Sunshine
                  Consent Decree as it relates to the Business. Buyer further
                  agrees that the provisions of this paragraph shall be binding
                  upon (A) any successors or assigns of Buyer, (B) any
                  transferees of all or any portion of the Business and (C) any
                  grantee of rights of use and/or operation thereof. Prior to
                  transferring any interest in the Business, Buyer shall deliver
                  to Seller written evidence satisfactory to Seller that such
                  transferee has agreed to assume and has the financial and
                  technical capability to assume the obligations set forth in
                  the Project Sunshine Consent Decree with respect to the
                  Purchased Assets.

                           (vii) Easement Agreements. Buyer agrees that it shall
                  grant such permanent licenses, easements or similar rights, in
                  form and substance reasonably satisfactory to Seller, as may
                  reasonably be requested by Seller in order to provide Seller
                  with access to any appurtenant pipeline facilities within the
                  Twin Cities Terminal and/or the Purchased Assets as is
                  necessary (as determined by Seller) to operate the assets as
                  described on Schedule 10(b)(vii); provided, however, that
                  Seller's access and use of any such facilities shall be done
                  in a manner so as not to unreasonably interfere with Buyer's
                  operation of the Business.

                                      -31-
   43

                  (c) Mutual Covenants. Buyer and Seller covenant and agree as
         follows:

                           (i) H-S-R. Buyer and Seller shall each file or cause
                  to be filed with the Federal Trade Commission and the United
                  States Department of Justice any notifications required to be
                  filed under the H-S-R Act with respect to the transactions
                  contemplated hereby, and Buyer and Seller shall bear the costs
                  and expenses of their respective filings; provided that Buyer
                  and Seller shall each pay 50% of the filing fee in connection
                  therewith. Buyer and Seller shall use their respective
                  reasonable best efforts to make such filings promptly (and in
                  any event within ten (10) business days) following the date
                  hereof, to respond promptly to any requests for additional
                  information and documentary materials made by either of such
                  agencies, to make any further filings that may be necessary,
                  proper or advisable in connection therewith and to cause the
                  waiting periods under the H-S-R Act to terminate or expire at
                  the earliest possible date and to resist in good faith, at
                  each of their respective cost and expense (including the
                  institution or defense of legal proceedings), any assertion
                  that the transactions contemplated hereby constitute a
                  violation of the antitrust laws, all to the end of expediting
                  consummation of the transactions contemplated hereby. Each of
                  Buyer, on the one hand, and Seller, on the other, shall
                  consult with the other prior to any meetings, by telephone or
                  in person, with the staff of the applicable governmental
                  authorities, and each of Buyer and Seller shall have the right
                  to have a representative present at any such meeting.

                           (ii) Assignments.

                             (A)  (I) With respect to any agreement, contract,
                                  license, lease, easement, right-of-way or
                                  Permit which (1) is not an Excluded Asset, (2)
                                  is material to the operation of the Business
                                  as it is currently operated by Seller, and (3)
                                  requires consent for the assignment thereof to
                                  Buyer, Seller shall take such actions as are
                                  commercially reasonable and necessary, and
                                  Buyer shall cooperate fully with Seller in all
                                  commercially reasonable respects, to effect
                                  assignment thereof to Buyer as of the Closing
                                  Date. It is understood that such actions by
                                  Seller shall not include any requirement of
                                  Seller to expend money, commence any
                                  litigation or offer or grant any accommodation
                                  (financial or otherwise) to any third party.
                                  In the event that Seller is unable to obtain
                                  the requisite approval for assignment of any
                                  such agreement, contract, license, lease,
                                  easement, right-of-way or Permit, or in the
                                  event such agreement, contract, license,
                                  lease, easement, right-of-way or Permit is
                                  required to be amended or supplemented and is
                                  not so amended or supplemented as of

                                      -32-
   44

                             the Closing Date, and such assignment is
                             reasonably necessary to conduct the Business in
                             the ordinary course of business without giving
                             rise to a material adverse effect on the Business,
                             at the written request of Buyer on or before the
                             Closing Date (except where such action would be
                             unlawful or prohibited by such agreement,
                             contract, license, lease, easement, right-of-way
                             or Permit), Seller shall (x) retain any such
                             agreement, contract, license, lease, easement,
                             right-of-way or Permit and shall enter into an
                             arrangement with Buyer to provide Buyer with the
                             benefits of such agreement, contract, license,
                             lease, easement, right-of-way or Permit, provided
                             that Buyer shall perform Seller's obligations
                             thereunder arising on or after the Closing Date
                             (and indemnify Seller against Losses suffered in
                             connection therewith) until such agreement,
                             contract, license, lease, easement, right-of-way
                             or Permit is assigned to Buyer or expires at the
                             earliest opportunity in accordance with its terms,
                             or is properly amended or supplemented, and (y)
                             take all commercially reasonable and necessary
                             actions required to assign to Buyer, or amend or
                             supplement, any such agreement, contract, license,
                             lease, easement, right-of-way or Permit as soon as
                             practicable after the Closing Date;

                             and (II) In addition to the obligations of Seller
                             under Section 10(c)(ii)(A)(I) above, from the
                             Closing Date until the second anniversary of the
                             Closing Date, Seller shall take such actions as are
                             commercially reasonable and necessary, including
                             expending money, and Seller shall cooperate fully
                             with Buyer in all commercially reasonable respects
                             to remedy the absence or invalidity of any
                             easement, right-of-way, permit, license or other
                             right of access relating to the Product Pipelines.

                       (B)   Notwithstanding Seller's obligations pursuant to
                             Section 10(c)(ii)(A), the assignment of any
                             agreement, contract, license, lease, easement,
                             right-of-way or Permit to be transferred to Buyer
                             which requires consent for assignment, or amendment
                             or supplement, may be effected after the Closing
                             Date. Except as otherwise provided in this
                             Agreement, the Purchase Price shall not be subject
                             to adjustment, and the Closing of the transactions
                             contemplated by this Agreement shall not be
                             delayed, by reason of any

                                     -33-
   45
                             inability to obtain consent for assignment of any
                             agreement, contract, license, lease, easement,
                             right-of-way or Permit or any such amendment or
                             supplement. Buyer acknowledges that certain
                             consents to the transactions contemplated by this
                             Agreement may be required from parties to
                             agreements, contracts, licenses, leases,
                             easements, rights-of-way or Permits (written or
                             otherwise) to which any of Seller or other member
                             of the BP Group is a party, and such consents may
                             not be obtained (provided that Seller has complied
                             with its obligations under this Section
                             10(c)(ii)). Buyer agrees that Seller shall not
                             have any liability whatsoever to Buyer arising out
                             of or relating to the failure to obtain any
                             consents that may have been or may be required in
                             connection with the transactions contemplated by
                             this Agreement or because of the default,
                             acceleration or termination of any such agreement,
                             contract, license, lease, easement, right-of-way
                             or Permit as a result thereof (provided that
                             Seller has complied with its obligations under
                             this Section 10(c)(ii)). Buyer further agrees that
                             no representation, warranty or covenant of Seller
                             contained herein shall be breached or deemed
                             breached and no condition of Buyer shall be deemed
                             not to be satisfied as a result of the failure to
                             obtain any consent or as a result of any such
                             default, acceleration or termination or any
                             lawsuit, action, claim, proceeding or
                             investigation commenced or threatened by or on
                             behalf of any persons arising out of or relating to
                             the failure to obtain any consent or any such
                             default, acceleration or termination (provided that
                             Seller has complied with its obligations under this
                             Section 10(c)(ii)).

                       (C)   With respect to any agreement, contract, license,
                             lease, easement, right-of-way or Permit that may
                             not be properly assigned to Buyer because of the
                             failure to obtain a required consent or that may
                             not be operated or used by Seller for Buyer's
                             benefit, Buyer shall indemnify, defend and hold
                             harmless Seller and the other members of the BP
                             Group from and against any liability that Seller or
                             any other members of the BP Group may have in
                             connection with such nontransferred agreements,
                             contracts, licenses, leases, easements,
                             rights-of-way or Permits as a result of the
                             transactions contemplated by this Agreement;
                             provided that, for the avoidance of doubt, it is
                             expressly understood and agreed that in the event
                             Seller is unable to provide Buyer the


                                      -34-
   46
                             benefits of any such agreement, contract, license,
                             lease, easement, right-of-way or Permit, Buyer
                             shall not be required to indemnify Seller against
                             Losses suffered in connection therewith until and
                             to the extent Seller, with full cooperation from
                             Buyer in all respects, is able to provide Buyer
                             the benefit of any such agreement, contract,
                             license, lease, easement, right-of-way or Permit.


                  (iii) Transition Services Agreement. In the event Buyer and
         Seller agree that transition services will be necessary after the
         Closing, Buyer and Seller shall negotiate in good faith to execute and
         deliver, at the Closing, a Transition Services Agreement substantially
         in the form attached hereto as Exhibit D (the "Transition Services
         Agreement"). Promptly following the execution of this Agreement,
         representatives of Buyer and Seller shall meet to develop a transition
         plan which shall identify services, service periods (not to exceed six
         (6) months) and service charges to be provided pursuant to the terms
         and conditions of the Transition Services Agreement and which will, to
         the extent practicable, be completed prior to the Closing. Such
         services may include any technical and/or managerial support required
         to operate the Business that are necessitated by a cessation of
         employment at the Refinery of one or more of the managers of the
         Refinery or the individuals acting as his or her direct reports as of
         the date of this Agreement.

                  (iv) Other Governmental Approvals. Buyer and Seller shall
         cooperate with each other and take all reasonable steps necessary to
         obtain authorization for the sale of the Business from all other
         applicable governmental authorities.

                  (v) Other Actions. Buyer and Seller shall otherwise use their
         respective commercially reasonable efforts to cause the satisfaction of
         all conditions precedent in this Section 10 and Sections 12 and 13 and
         the Closing to occur as soon as reasonably practicable after the date
         of this Agreement.

                  (vi) Throughput Agreement. At the Closing, Buyer and Seller
         shall execute and deliver a Throughput Agreement substantially in the
         form attached hereto as Exhibit F (the "Throughput Agreement"). The
         Throughput Agreement shall provide for usage by the BP Group of the
         Twin Cities Terminal.

                  (vii) Retail Marketing Facilities. If there shall be any fact
         or circumstance not disclosed in this Agreement or the schedules hereto
         relating to a Retail Marketing Facility that is reasonably likely to
         impose upon Buyer a material Loss with respect to, or diminution in
         value in, such Retail Marketing Facility, then Seller, at its election,
         may (A) remove such Retail Marketing Facility from the definition of
         Purchased Assets, (B) cure such fact or circumstance or (C) indemnify
         Buyer from

                                      -35-
   47
         such Loss or diminution in value. For each Retail Marketing Facility so
         removed the Purchase Price shall be reduced by Five Hundred Thousand
         Dollars ($500,000) and the parties shall deem such fact or circumstance
         cured with no further rights to any adjustment to the Purchase Price as
         a result thereof. For purposes of this Section 10(c)(vii) only, any
         such fact or circumstance shall be deemed to impose a material Loss or
         diminution in value only if such Loss or diminution in value is
         reasonably likely to exceed Seven Hundred Fifty Thousand Dollars
         ($750,000) with respect to such Retail Marketing Facility or One
         Hundred Seventy-Five Thousand Dollars ($175,000) if such Loss or
         diminution in value results from a defect in title to the Retail
         Marketing Real Property relating to such Retail Marketing Facility.

                  (viii) Jobber Business. Buyer and Seller acknowledge that
         Seller may be unable to assign certain of the agreements relating to
         the Jobber Business that are listed on Schedule 1(r) attached hereto.
         For each such agreement that Seller is unable to assign to Buyer,
         Seller shall remove such agreement from the definition of the Purchased
         Assets. For each agreement so removed, the Purchase Price shall be
         adjusted as set forth in Section 3(b) in an amount equal to the product
         of (A) $0.085 and (B) the aggregate gallons of product supplied by
         Seller in fiscal year 2000 pursuant to such unassigned agreement.

         11. EMPLOYEES.

                  (a) Employees. Schedule 11(a) attached hereto contains a list
         of all employees of Seller or other members of the BP Group directly
         employed in the operation of the Business (collectively, the
         "Employees"), including employees who are receiving short-term
         disability benefits or are on family and medical, medical/long-term
         disability, administrative or military leave or any other type of leave
         that entitles the employee to reinstatement upon completion of the
         leave under the applicable leave policies of Seller or other members of
         the BP Group (collectively, "Leave"). Schedule 11(a) sets forth both
         Employees represented by Local 7-10 of the Paper, Allied Industrial,
         Chemical and Energy Workers International Union (the "Refinery Union,"
         and the Employee membership of the Refinery Union, "Refinery Union
         Employees") and Employees represented by Local 6-1 and Local 6-0507 of
         the Paper, Allied-Industrial, Chemical and Energy Workers International
         Union and Local Union No. 120 of the General Drivers, Helpers, and
         Truck Terminal Employees International Union, Affiliated with the
         International Brotherhood of Teamsters, Teamsters Joint Council 32 (the
         "Non-Refinery Unions," and the Employee membership of the Non-Refinery
         Unions, "Non-Refinery Union Employees"), including which Employees are
         covered by each such Unions. The Refinery Union and the Non-Refinery
         Unions are also referred to herein collectively as "Unions" and
         Refinery Union Employees and Non-Refinery Union Employees are also
         referred to herein collectively as "Union Employees." Schedule 11(a)
         also sets forth Employees not represented by the Unions ("Non-Union
         Employees"). Seller shall be entitled


                                      -36-
   48
         to update Schedule 11(a) as necessary at any time prior to Closing to
         reflect any and all employment changes.

                  (b) Employment Offers to Active Non-Union Employees, to Active
         Non-Refinery Union Employees, and to All Refinery Union Employees. No
         later than ten (10) days after the date of this Agreement (and not
         later than three (3) days after any update of Schedule 11(a)), Buyer
         shall offer employment with Buyer, effective as of the Closing Date, to
         all active Non-Union Employees of the Business, to all active
         Non-Refinery Union Employees and to all Refinery Union Employees at the
         same or better salaries or wages, with similar duties and
         responsibilities, at the same location and on the same status (e.g.,
         full-time or part-time) as provided by Seller or other members of the
         BP Group immediately prior to the Closing Date. All Employees who
         accept employment with Buyer pursuant to the offers described either in
         this Section 11(b) or in Section 11(c) are referred to herein as
         "Transferred Employees." Transferred Employees who are Refinery Union
         Employees are also referred to herein as "Refinery Union Transferred
         Employees," Transferred Employees who are Non-Refinery Union Employees
         are also referred to herein as "Non-Refinery Union Transferred
         Employees" and Transferred Employees who are Non-Union Employees are
         also referred to herein as "Non-Union Transferred Employees." Buyer
         shall not reduce any Transferred Employee's initial salary or wages as
         an employee of Buyer during the 12-month period after the Closing Date.
         Buyer will give each active Non-Union Employee, each active
         Non-Refinery Union Employee, and each Refinery Union Employee no less
         than seven (7) days in which to accept or reject Buyer's employment
         offer.

                  (c) Employment Offers to Non-Union Employees on Leave and to
         Non-Refinery Union Employees on Leave. In addition, no later than ten
         (10) days after the date of this Agreement, Buyer shall offer
         employment with Buyer to each Non-Union Employee who is on Leave as of
         the Closing Date and to each Non-Refinery Union Employee who is on
         Leave as of the Closing Date, commencing at such time as such Non-Union
         Employee or Non-Refinery Union Employee is ready to return to work, at
         the same or better salaries or wages, with similar duties and
         responsibilities, at the same location and on the same status (e.g.,
         full-time or part-time) as provided by Seller or other members of the
         BP Group immediately prior to the commencement of such Non-Union
         Employee's or Non-Refinery Union Employee's Leave; provided, however,
         that such Non-Union Employee or Non-Refinery Union Employee is ready to
         return to work within one hundred twenty (120) days after the Closing
         Date. Buyer will give each Non-Union Employee on Leave and each
         Non-Refinery Union Employee on Leave no less than seven (7) days in
         which to accept or reject Buyer's employment offer.

                  (d) Transfer Time. All Transferred Employees shall become
         employees of Buyer as of 12:01 a.m., Central Time, on the Closing Date,
         and except as otherwise provided herein, at such time, Buyer shall
         assume and be responsible for payment of all salaries and benefits and
         all other costs and liabilities relating to the Transferred Employees,
         except that with regard to a Non-Union Employee on Leave or a
         Non-Refinery Union Employee on Leave,


                                      -37-
   49
         such obligations shall not attach until the Non-Union Employee on Leave
         or the Non-Refinery Union Employee on Leave commences employment with
         Buyer.

                  (e) Level of Employee Benefits Provided by Buyer. Buyer shall
         provide to all Non-Union Transferred Employees and to all Non-Refinery
         Union Transferred Employees employee benefits in accordance with
         employee benefit plans (such as defined benefit plans, defined
         contribution plans and welfare benefit plans), programs, policies and
         pay practices (such as vacations, bonuses and short-term disability
         leaves) which shall be the same as or better than the benefits provided
         to substantially similar employees of Buyer. No later than the Closing
         Date, Seller will provide to Buyer the Transferred Employees'
         recognized credited service, and participation, vesting and, as
         applicable, benefit accrual periods of service amounts, with Seller or
         other members of the BP Group as of immediately prior to the Closing
         Date.

                  (f) Pension Plans. Buyer agrees that, effective as of the
         Closing Date, Buyer will sponsor a defined benefit pension plan ("Buyer
         Pension Plan"), as defined under Section 3(35) of the Employee
         Retirement Income Security Act of 1974, as amended, with respect to
         Transferred Employees who participate in the BP Retirement Accumulation
         Plan ("BP RAP") prior to the Closing Date. The Buyer Pension Plan will
         provide that (i) such Transferred Employees will be eligible to
         participate in the Buyer Pension Plan as of the Closing Date, and (ii)
         such Transferred Employees will be given service credit equal to the
         number of years of participation and vesting periods of service such
         Transferred Employees have under the BP RAP. The Buyer Pension Plan
         also will grant service for benefit accrual service equal to the number
         of years of benefit accrual service for those Transferred Employees who
         have an accrued benefit in the BP RAP and may provide that the age 65
         single life annuity payable to Transferred Employees under the Buyer
         Pension Plan may be offset by the amount of the age 65 single life
         annuity payable to such Transferred Employees under the BP RAP. In no
         event shall the age 65 single life benefit accrued under the Buyer
         Pension Plan for Transferred Employees be less than the benefit such
         Transferred Employees would receive if only service with Buyer were
         recognized under the Buyer Pension Plan. The Buyer Pension Plan may
         include such other terms and provisions as shall be determined by Buyer
         in its sole discretion to the extent not inconsistent with this Section
         11(f). Seller agrees to furnish on a timely basis such information with
         regard to benefits payable to Transferred Employees under the BP RAP
         and such other information as Buyer may from time to time, within one
         (1) year after the Closing Date, reasonably request for purposes of
         complying with this Section 11(f).

                  (g) Defined Contribution Pension Plans. Buyer agrees that,
         effective as of the Closing Date, Buyer's defined contribution pension
         plans that Transferred Employees participate in shall be amended to
         recognize such Transferred Employees' participation and vesting periods
         of service with Seller and other members of the BP Group for purposes
         of determining participation, vesting and the level of company
         contributions.


                                      -38-
   50

                  (h) Welfare Benefits and Other Benefits and Policies. For each
         Transferred Employee who participates in any welfare benefit plan, or
         is subject to any policy or pay practice, of Buyer, both Buyer and the
         applicable welfare benefit, policy and pay practice (i) shall recognize
         the Transferred Employee's recognized credited service amounts with
         Seller and other members of the BP Group for all purposes including
         eligibility, vesting and benefit determination and accrual; (ii) shall
         not require a physical examination or other proof of insurability, and
         shall waive all coverage exclusions and limitations relating to waiting
         periods or pre-existing conditions, with respect to any of the
         Transferred Employees or any dependent covered by Seller's and other
         members of the BP Group's comparable welfare benefit plan, policy or
         pay practice in effect as of the Closing Date; and (iii) shall credit
         the expenses of the Transferred Employees which were credited toward
         2001 deductibles or co-payments under the applicable welfare benefit
         plan of Seller or other members of the BP Group against satisfaction of
         any 2001 deductibles or co-payments under Buyer's medical welfare
         benefit plan for the Transferred Employees.

                  (i) Vacation. Seller shall be responsible for paying the
         Transferred Employees for any vacation due as of the Closing Date under
         the applicable vacation policy of Seller or other members of the BP
         Group (the "Seller Vacation Policy"). Buyer will provide Transferred
         Employees who, based upon the recognized credited service amounts of
         such Transferred Employees with Seller or other members of the BP
         Group, were eligible for a greater amount of annual vacation under the
         Seller Vacation Policy than they are under Buyer's vacation policy even
         after Buyer recognizes such Transferred Employees' credited service
         amounts, with their Seller annual vacation amount. Between the Closing
         Date and the end of the year in which the Closing occurs, Buyer shall
         permit all Transferred Employees to take the same number of days of
         vacation on an unpaid basis as they would have been eligible to take
         immediately prior to the Closing Date under the Seller Vacation Policy
         based upon the recognized credited service amounts of such Transferred
         Employees with Seller or other members of the BP Group.

                  (j) Severance. Buyer shall establish a severance policy
         substantially similar to the 2001 BP Severance Benefits Plan (the "BP
         Severance Plan") with respect to any Non-Union Transferred Employee who
         has actions taken against such Non-Union Transferred Employee within
         eighteen (18) months after the Closing Date that would make the
         Non-Union Transferred Employee eligible for severance benefits under
         the involuntary terminations section of the BP Severance Plan. Buyer's
         severance policy established under this Section 11(j) shall recognize
         the Non-Union Transferred Employees' recognized credited service
         amounts with Seller or other members of the BP Group.

                  (k) Buyer's Adoption of Collective Bargaining Agreement. Buyer
         will recognize the Refinery Union as the exclusive representative of
         the Refinery Union Transferred Employees and will adopt all collective
         bargaining agreements between Seller and the Refinery Union and all
         existing contract extension agreements, memoranda of agreement,

                                      -39-
   51

         letters of understanding and similar agreements and instruments
         (collectively, the "CBA"), except that Buyer is not required to
         continue the existing employee benefit plans provided for under any
         applicable provisions of the CBA. If Buyer does not continue said
         existing employee benefit plans, Buyer will comply with the terms of
         the Letter of Understanding- Successorship attached hereto as Schedule
         11(k) relating to establishing and implementing an alternate package of
         benefit plans and shall indemnify the Seller Indemnified Parties
         against any Losses caused by, arising from, incurred in connection with
         or relating in any way thereto.

                  (l) WARN Act. Buyer represents and warrants to, and covenants
         with, Seller that there will be no major employment losses as a
         consequence of the transactions contemplated by this Agreement that
         might trigger obligations under the Worker Adjustment and Retraining
         Notification Act, 29 U.S.C. Section 2101 et. seq., or under any similar
         provision of any federal, state, regional, foreign or local law, rule
         or regulation (collectively, "WARN Obligations"). To the extent that
         any WARN Obligations might arise as a consequence of the transactions
         contemplated by this Agreement, Buyer shall be responsible for, and
         shall indemnify the Seller Indemnified Parties against any Losses
         caused by, arising from, incurred in connection with or relating in any
         way to, any WARN Obligations arising as a result of any employment
         losses occurring on or after the Closing Date. For ninety (90) days
         following the Closing Date, Buyer shall not engage in any mass layoff,
         plant closing or other action that might trigger WARN Obligations of
         Seller or any other member of the BP Group.

                  (m) Service Credit. From and after the Closing Date, the
         Transferred Employees shall be given credit for their service
         recognized by Seller or other members of the BP Group prior to the
         Closing Date for all purposes, including eligibility, vesting and
         benefit determination and accrual under all applicable plans and
         programs of Buyer as well as for purposes of determining any vacation,
         severance or other related benefits to be provided pursuant to the
         manner described above.

                  (n) Benefits Miscellaneous. Notwithstanding the foregoing,
         Buyer shall not be liable for any obligations arising out of
         participation by Transferred Employees in the Employee Benefit Plans of
         Seller.

         12. BUYER'S OBLIGATION TO CLOSE. Buyer's obligation to close under this
Agreement is subject to the fulfillment on or prior to the Closing Date of each
of the following conditions (except to the extent that Buyer shall have
hereafter agreed in writing to waive one or more of such conditions).

                  (a) Compliance with Agreement. Seller shall have performed and
         complied in all material respects with all covenants, agreements and
         conditions required by this Agreement to be performed or complied with
         by Seller prior to the Closing Date.

                                      -40-
   52

                  (b) Representations and Warranties. The representations and
         warranties of Seller made in this Agreement (as amended by Seller in
         accordance with Section 10(a)(iii)) shall be true and correct in all
         material respects as of the date hereof and on and as of the Closing
         Date, as though made on and as of the Closing Date, except for
         representations and warranties that speak as of a specific date or time
         (which need only be true and correct as of such date or time). Seller
         shall have performed or complied in all material respects with the
         obligations and covenants required by this Agreement to be performed or
         complied with by Buyer by the time of the Closing.

                  (c) Litigation. There shall not be any judicial restraining
         order or injunction, preliminary or otherwise, in effect prohibiting
         the Closing of the transactions contemplated by this Agreement. There
         shall not be pending or threatened any litigation or proceeding
         instituted by any federal, state or foreign governmental agency to
         restrain, prohibit or otherwise interfere with or obtain substantial
         monetary damages in connection with the consummation of the
         transactions contemplated by this Agreement, or operation of the
         Business by Buyer after the Closing Date.

                  (d) Governmental Consents. The applicable waiting period under
         the H-S-R Act and any extension thereof shall have terminated or
         expired, without a challenge to the transactions contemplated by this
         Agreement, and the transactions contemplated by this Agreement shall
         have been authorized by applicable governmental
         authorities.

         13. SELLER'S OBLIGATION TO CLOSE. Seller's obligation to close under
this Agreement is subject to the fulfillment on or prior to the Closing Date of
each of the following conditions (except to the extent that Seller shall have
hereafter agreed in writing to waive one or more of such conditions).

                  (a) Compliance with Agreement. Buyer shall have performed and
         complied in all material respects with all covenants, agreements and
         conditions required by this Agreement to be performed or complied with
         by Buyer prior to the Closing Date.

                  (b) Representations and Warranties. The representations and
         warranties of Buyer made in this Agreement shall be true and correct in
         all material respects as of the date hereof and on and as of the
         Closing Date, as though made on and as of the Closing Date, except for
         representations and warranties that speak as of a specific date or time
         (which need only be true and correct as of such date or time). Buyer
         shall have performed or complied in all material respects with the
         obligations and covenants required by this Agreement to be performed or
         complied with by Buyer by the time of the Closing.

                  (c) Litigation. There shall not be any judicial restraining
         order or injunction, preliminary or otherwise, in effect prohibiting
         the Closing of the transactions contemplated by this Agreement. There
         shall not be pending or threatened any litigation or proceeding

                                      -41-
   53

         instituted by any federal, state or foreign governmental agency to
         restrain, prohibit or otherwise interfere with or obtain substantial
         monetary damages in connection with the consummation of the
         transactions contemplated by this Agreement, or the operation of the
         Business by Buyer after the Closing Date.

                  (d) Governmental Consents. The applicable waiting period under
         the H-S-R Act and any extension thereof shall have terminated or
         expired, without a challenge to the transactions contemplated by this
         Agreement, and the transactions contemplated by this Agreement shall
         have been authorized by applicable governmental authorities.

         14. FURTHER ASSURANCES. From time to time, as and when reasonably
requested by any party hereto, the other party shall execute and deliver, or
cause to be executed and delivered, all such documents and instruments and shall
take, or cause to be taken, all such further or other actions (subject to the
limitations set forth in Section 10(c)(ii)), which documents, instruments or
actions are consistent with, and customary and necessary for, the consummation
of the transactions contemplated by this Agreement.

         15. INDEMNIFICATION.

                  (a) Buyer's Indemnification of Seller. Except as otherwise
         provided herein and subject to the provisions of this Section 15, from
         and after the Closing Date, Buyer shall indemnify, defend, save and
         hold harmless, Seller, the other members of the BP Group, and their
         respective directors, officers, employees, shareholders, partners,
         counsel, auditors, accountants, agents, advisors and other
         representatives and each of the heirs, executors, successors and
         assigns of any of the foregoing (collectively, the "Seller Indemnified
         Parties"), from and against any and all Losses of any kind which are
         caused by, arise from, are incurred in connection with or relate in any
         way to:

                           (i) the ownership of the Purchased Assets, including
                  the Refinery and all of the other Purchased Assets, and the
                  operation of the Refinery on and after the Closing Date,
                  including those Losses arising under, any foreign, federal,
                  state or local laws or regulations, or any contract, warranty,
                  tort or other theory of law;

                           (ii) Buyer's modification of any technology,
                  software, know-how or proprietary information transferred or
                  licensed to Buyer pursuant to the Technology Agreement;

                           (iii) (A) Buyer's breach of or failure to perform any
                  covenant or agreement in this Agreement requiring performance
                  by Buyer on or after the Closing Date (including any
                  discontinuance, suspension or modification of any compensation
                  or employee benefit plan or program maintained by Buyer as
                  contemplated by

                                      -42-
   54
                  Section 11); or (B) Buyer's breach of any representation or
                  warranty in this Agreement which survives the Closing; or

                           (iv) the Assumed Liabilities.

                  provided, however, that Buyer shall not have any liability
         under clause (iii) above for any breach of a representation or warranty
         contained in this Agreement or the other agreements contemplated hereby
         is Seller had knowledge of such breach at the time of Closing and
         failed to notify Buyer of such breach, and no Losses caused by, arising
         from, incurred in connection with or related in any way thereto shall
         be aggregated for purposes of Section 15(j).

                  (b) Seller's Indemnification of Buyer. Except as otherwise
         provided herein and subject to the provisions of this Section 15, from
         and after the Closing Date, Seller shall indemnify, defend, save and
         hold harmless, Buyer, its affiliates and their respective directors,
         officers, employees, shareholders, partners, counsel, auditors,
         accountants, agents, advisors and other representatives and each of the
         heirs, executors, successors and assigns of any of the foregoing
         (collectively, the "Buyer Indemnified Parties") from and against any
         and all Losses of any kind which are caused by, arise from, are
         incurred in connection with or relate in any way to:

                           (i) the Excluded Assets or the Excluded Liabilities
                  (other than any environmental matters covered by Section
                  15(c)ii below) (provided, however, that with respect to the
                  Excluded Liabilities, the provisions of Sections 15(i) through
                  15(m) will not apply to indemnity claims by Buyer relating to
                  Sections 4(b)(i) through (vi) and 4(b)(ix) through (xii) of
                  this Agreement);

                           (ii) (A) Seller's breach of or failure to perform any
                  covenant or agreement in this Agreement requiring performance
                  by Seller on or after the Closing Date; or (B) Seller's breach
                  of any representation or warranty in this Agreement which
                  survives the Closing; provided that, for purposes of this
                  Section 15, any occurrence relating to Seller's representation
                  contained in (x) Section 6(e)(iii) shall not be deemed to be
                  material or have a material adverse effect on the Business
                  unless such effect or adverse effect exceeds Two Million
                  Thousand Dollars ($2,000,000) and (y) Section 6(m) shall not
                  be deemed to be material or to have a material adverse effect
                  on the Business unless such effect or adverse effect exceeds
                  Four Million Dollars ($4,000,000);

                           (iii) any failure by Seller to comply with the
                  provisions, if any, of state or local bulk sales laws;

                                      -43-
   55

                           (iv) property damage caused by, or any environmental
                  remediation required due to a violation of, Health, Safety and
                  Environmental Laws during the pre-Closing operation of the
                  Business ("Remediation Losses"); and

                           (v) subject to the limitations set forth in Section
                  15(m), disruption in the operation of the Product Pipelines
                  resulting from the absence or invalidity of any easements,
                  rights-of-way, permits, licenses or other rights of access
                  relating to the Product Pipelines ("Rights-of-Way Losses");

                  provided, however, that Seller shall not have any liability
                  under clause (ii) above for any breach of a representation or
                  warranty contained in this Agreement or the other agreements
                  contemplated hereby if Buyer had knowledge of such breach at
                  the time of Closing and failed to notify Seller of such breach
                  in accordance with Section 10(b)(ii), and no Losses caused by,
                  arising from, incurred in connection with or related in any
                  way thereto shall be aggregated for purposes of Section 15(j).

                  (c) Environmental Indemnifications. Buyer and Seller shall
         provide the environmental indemnifications specified below:

                           (i) Seller shall indemnify, defend, save and hold
                  harmless the Buyer Indemnified Parties from and against any
                  and all Losses of any kind which are caused by, arise from,
                  are incurred in connection with or relate in any way to (A) a
                  breach of Seller's representations and warranties in Section 7
                  or (B) the Excluded Liabilities described in Section 4(b)(x)
                  (provided, however, that the provisions of Sections 15(i)
                  through 15(l) will not apply to indemnity claims by Buyer
                  relating to Section 4(b)(x) or (xii) of this Agreement); and

                           (ii) Buyer shall assume responsibility for, and shall
                  indemnify, defend, save and hold harmless, the Seller
                  Indemnified Parties from and against (A) any and all Losses of
                  any kind which are caused by, arise from, are incurred in
                  connection with or relate in any way to, the ownership of the
                  Purchased Assets or the operation of the Business, under,
                  relating to or otherwise required or incurred to achieve or
                  maintain compliance with Health, Safety and Environmental
                  Laws, as the same are in effect from time to time,
                  irrespective of whether the events giving rise to such
                  liabilities occurred prior to, on or after the Closing Date,
                  including any and all Losses of any kind which are caused by,
                  arise from, are incurred in connection with or relate in any
                  way to Asbestos-Related Liabilities, the Disclosed
                  Environmental Liabilities or the Project Sunshine Consent
                  Decree and (B) any and all Losses that are caused by or result
                  or arise from changes in, modifications to or amendments of
                  Health, Safety and Environmental Laws that were in effect
                  prior to the Closing Date or promulgated, made or enacted on
                  or after the Closing Date;


                                      -44-
   56
                  provided, however, that Seller shall not have any liability
                  under clause (i) above for any breach of a representation or
                  warranty contained in this Agreement or the other agreements
                  contemplated hereby if Buyer had knowledge of such breach at
                  the time of Closing and failed to notify Seller of such breach
                  in accordance with Section 10(b)(ii), and no Losses caused by,
                  arising from, incurred in connection with or related in any
                  way thereto shall be aggregated for purposes of Section 15(j).

                  (d) Exclusive Remedy. Any claim or cause of action based on,
         arising out of or relating in any way to any of the transactions
         contemplated under this Agreement (including all Exhibits and Schedules
         attached hereto or referenced herein) must be brought by either party
         in accordance with the provisions and limitations of this Agreement,
         whether such claim arises out of any contract, tort or otherwise.
         Except as otherwise provided in this Agreement, the parties hereby
         waive to the fullest extent permitted under applicable law, any and all
         rights, claims and causes of action they may have against each other
         relating to the subject matter of this Agreement and the other
         agreements contemplated hereby arising under or based on any federal,
         state, provincial, local or foreign statute, law, ordinance, rule or
         regulation or otherwise, including such rights, claims and causes of
         action Buyer may have against Seller under CERCLA, breaches of
         statutory or implied warranties or otherwise, nuisance or other tort
         actions, and common law rights of contribution. Without limiting the
         generality of the foregoing, Buyer understands and agrees that the
         rights accorded under this Section 15 are the sole and exclusive remedy
         of Buyer against Seller or any other member of the BP Group with
         respect to any matters relating to Health, Safety and Environmental
         Laws. Buyer hereby waives any right to seek contribution or other
         recovery from Seller or any other member of the BP Group under such
         Health, Safety and Environmental Laws, and Buyer hereby releases Seller
         and the other members of the BP Group from any claims, demands or
         causes of action that Buyer has or may have in the future against
         Seller and/or the other members of the BP Group under Health, Safety
         and Environmental Laws. Buyer further acknowledges and agrees that, (A)
         other than the representations and warranties of Seller specifically
         contained in this Agreement, there are no representations or warranties
         of Seller, any other member of the BP Group or their respective
         directors, officers, employees, shareholders, partners, counsel,
         auditors, accountants, agents, advisors or other representatives or any
         other Person either express or implied, with respect to any of them,
         the Business, the Purchased Assets or the Assumed Liabilities and (B)
         it shall have no claim or right to indemnification with respect to any
         information, documents or materials furnished by Seller, any other
         member of the BP Group or their respective directors, officers,
         employees, shareholders, partners, counsel, auditors, accountants,
         agents, advisors or other representatives or any other Person or any of
         their officers, directors, employees, shareholders, partners, counsel,
         auditors, accountants, agents, advisors or other representatives,
         including the Offering Memorandum and any information, documents or
         material made available to Buyer in certain "data rooms," management
         presentations or any other form in expectation of the transactions
         contemplated by this Agreement.


                                      -45-
   57
                  (e) Procedures Relating to Indemnification Among Buyer and
         Seller. Following the discovery of any facts or conditions which could
         reasonably be expected to give rise to a Loss or Losses for which
         indemnification is provided under this Agreement, the party seeking
         indemnification (the "Indemnified Party") shall, as promptly as
         reasonably possible thereafter, provide written notice to the party
         from whom indemnification is sought (the "Indemnifying Party"), setting
         forth the specific facts and circumstances, in reasonable detail,
         relating to such Loss or Losses and the amount of Loss or Losses (or a
         reasonable, good-faith estimate thereof if the actual amount is not
         known or not capable of reasonable calculation) ("Indemnification
         Notice"); provided, however, that failure to give such Indemnification
         Notice on a timely basis shall not affect the indemnification provided
         hereunder except to the extent the Indemnifying Party shall have been
         actually and materially prejudiced as a result of such failure.
         Notwithstanding the foregoing:

                           (i) a Buyer Indemnified Party shall not be entitled
                  to make a claim against Seller under Section 15(b)(ii) unless
                  and until (A) Buyer shall have provided Seller written notice
                  of such default; and (B) Seller shall have failed to cure such
                  default within sixty (60) days after Seller's receipt of
                  Buyer's notice; and

                           (ii) a Seller Indemnified Party shall not be entitled
                  to make a claim against Buyer under Section 15(a)(iii) unless
                  and until (A) Seller shall have provided Buyer written notice
                  of default; and (B) Buyer shall have failed to cure such
                  default within sixty (60) days after Buyer's receipt of
                  Seller's notice.

                  (f) Procedures Relating to Indemnification for Third Party
         Claims.

                           (i) In order for an Indemnified Party to be entitled
                  to any indemnification provided for under this Agreement in
                  respect of, arising out of or involving a claim or demand made
                  by any Person against the Indemnified Party (a "Third Party
                  Claim"), such Indemnified Party must provide an
                  Indemnification Notice to the Indemnifying Party of the Third
                  Party Claim as promptly as reasonably possible after receipt
                  by such Indemnified Party of notice of the Third Party Claim.
                  Thereafter, the Indemnified Party shall deliver to the
                  Indemnifying Party, within five (5) business days after the
                  Indemnified Party's receipt thereof, copies of all notices and
                  documents (including court papers) received by the Indemnified
                  Party relating to the Third Party Claim; provided, however,
                  that failure to provide an Indemnification Notice, or deliver
                  copies of all notices and documents, on a timely manner shall
                  not affect the indemnification provided hereunder except to
                  the extent the Indemnifying Party shall have been actually
                  prejudiced as a result of such failure.

                           (ii) If a Third Party Claim is made against an
                  Indemnified Party, the Indemnifying Party shall be entitled to
                  participate in the defense thereof and, if it so chooses and
                  acknowledges its obligation to indemnify the Indemnified Party
                  therefor,

                                      -46-
   58

                  to assume the defense thereof with counsel selected by the
                  Indemnifying Party and reasonably satisfactory to the
                  Indemnified Party. Notwithstanding any acknowledgment made
                  pursuant to the immediately preceding sentence, the
                  Indemnifying Party shall continue to be entitled to assert any
                  limitation on its indemnification responsibility contained in
                  Sections 15(j) and 15(k). Should the Indemnifying Party so
                  elect to assume the defense of a Third Party Claim, the
                  Indemnifying Party shall not be liable to the Indemnified
                  Party for legal expenses subsequently incurred by the
                  Indemnified Party in connection with the defense thereof. If
                  the Indemnifying Party assumes such defense, the Indemnified
                  Party shall have the right to participate in the defense
                  thereof and to employ counsel, at its own expense, separate
                  from the counsel employed by the Indemnifying Party, it being
                  understood, however, that the Indemnifying Party shall control
                  such defense. The Indemnifying Party shall be liable for the
                  fees and expenses of counsel employed by the Indemnified Party
                  for any period during which the Indemnifying Party has not
                  assumed the defense thereof. If the Indemnifying Party chooses
                  to defend any Third Party Claim, all the parties hereto shall
                  cooperate in the defense or prosecution of such Third Party
                  Claim. Such cooperation shall include the retention and (upon
                  the Indemnifying Party's request) the provision to the
                  Indemnifying Party of records and information which are
                  reasonably relevant to such Third Party Claim and making
                  employees available on a mutually convenient basis to provide
                  additional information and explanation of any material
                  provided hereunder. Whether or not the Indemnifying Party
                  shall have assumed the defense of a Third Party Claim, the
                  Indemnified Party shall not admit any liability with respect
                  to, or settle, compromise or discharge, or consent to the
                  entry of any judgment with respect to such Third Party Claim
                  without the Indemnifying Party's prior written consent (which
                  consent shall not be unreasonably withheld).

                  (g) Losses Net of Insurance and Taxes. The amount of any and
         all Losses under this Section 15 and elsewhere under this Agreement
         shall be determined net of any amounts recovered or recoverable by the
         Indemnified Party under insurance policies, indemnities or other
         reimbursement arrangements with respect to such Losses. Each party
         hereby waives, or will procure the waiver of, any subrogation rights
         that its insurer may have with respect to any indemnifiable Losses. The
         amount of any and all Losses shall be reduced by the amount of any net
         reduction in cash Tax payable by the Indemnified Party with respect to
         such Losses through and including the Tax year in which the
         indemnification payment is made. Any indemnity payment under this
         Agreement shall be treated as an adjustment to the Purchase Price for
         tax purposes.

                  (h) Attorneys' Fees. In connection with any litigation arising
         out of this Agreement or to enforce any indemnification claim pursuant
         to this Agreement, the prevailing party shall be entitled to recover
         from the nonprevailing party its reasonable attorneys' fees and costs,
         on appeal or otherwise.


                                      -47-
   59
                  (i) Time Limitation. Except as otherwise provided in this
         Agreement, any claim by any Buyer Indemnified Party for indemnity
         arising under this Agreement, including pursuant to Sections 15(b) and
         15(c), shall be brought within two (2) years after the Closing Date. A
         claim shall be deemed to have been brought only upon delivery of a
         proper Indemnification Notice to the other party at the notice address
         set forth in Section 20. Any claim required to be made within such two
         (2) year period not so timely made shall be forever barred.

                  (j) Monetary Limitation. Buyer shall have no claim under this
         Agreement against Seller or any other member of the BP Group for any
         Losses unless and until the aggregate of all such Losses incurred or
         sustained by the Buyer Indemnified Parties exceeds Four Million Dollars
         ($4,000,000) and then only for the excess over Four Million Dollars
         ($4,000,000) (the "Threshold"); provided that Losses amounting to less
         than Two Hundred Fifty Thousand Dollars ($250,000) in the aggregate
         arising out of the same occurrence or matter shall not be aggregated
         with other Losses for purposes of determining whether and when the
         Threshold has been reached. After the Threshold has been reached,
         Seller shall have no obligation to indemnify the Buyer Indemnified
         Parties under this Agreement with respect to such matters for any
         Losses amounting to less than Two Hundred Fifty Thousand Dollars
         ($250,000) in the aggregate arising out of the same occurrence or
         matter. For purposes of this Section 15(j), Losses shall exclude
         Remediation Losses and Rights-of-Way Losses, which are addressed in
         Sections 15(l) and 15(m), respectively, below.

                  (k) Limitation of Liability. Seller's aggregate liability for
         Indemnification pursuant to this Agreement, including Section 15(b) and
         (c), shall in no event exceed an amount equal to Fifty-Two Million Five
         Hundred Thousand Dollars ($52,500,000).

                  (l) Environmental Remediation Monetary Limitation.
         Notwithstanding any other provision of this Agreement, Buyer shall have
         no claim under this Agreement against Seller or any other member of the
         BP Group for any Remediation Losses by Seller or other members of the
         BP Group unless and until the aggregate of all such Remediation Losses
         incurred or sustained by the Buyer Indemnified Parties exceeds Five
         Million Dollars ($5,000,000), and then only for the excess over Five
         Million Dollars ($5,000,000) (the "First Threshold"). After the First
         Threshold has been reached, Buyer shall only have a claim under this
         Agreement against Seller for fifty percent (50%) of the excess of any
         Remediation Losses incurred or sustained by the Buyer Indemnified
         Parties over the First Threshold unless and until the aggregate of all
         such Remediation Losses incurred or sustained by the Buyer Indemnified
         Parties exceeds Ten Million Dollars ($10,000,000) (the "Second
         Threshold"). Thereafter, subject to Sections 15(j) and 15(k), Buyer
         shall have a claim under this Agreement against Seller for 100% of the
         excess of Remediation Losses over the Second Threshold. Notwithstanding
         the foregoing, (i) Remediation Losses amounting to less than Two
         Hundred Fifty Thousand Dollars ($250,000) in the aggregate arising out
         of the same occurrence or matter shall not be aggregated with any other
         Remediation Losses for purposes of determining


                                      -48-
   60
         whether and when the First Threshold or the Second Threshold has been
         reached. After the First Threshold or Second Threshold has been
         reached, Seller shall have no obligation to indemnify the Buyer
         Indemnified Parties under this Agreement with respect to such matters
         for any Remediation Losses amounting to less than Two Hundred Fifty
         Thousand Dollars ($250,000) in the aggregate arising out of the same
         occurrence or matter.

                  (m) Rights-of-Way Monetary Limitation. Notwithstanding any
         other provision of this Agreement, Buyer shall have no claim under this
         Agreement against Seller or any other member of the BP Group for any
         Rights-of-Way Losses unless and until the aggregate of all such
         Rights-of-Way Losses incurred or sustained by the Buyer Indemnified
         Parties exceeds Two Million Dollars ($2,000,000), and then only for the
         excess over Two Million Dollars ($2,000,000) (the "Level 1 Threshold").
         After the Level 1 Threshold has been reached, Buyer shall only have a
         claim under this Agreement against Seller for fifty percent (50%) of
         the excess of any Rights-of-Way Losses incurred or sustained by the
         Buyer Indemnified Parties over the Level 1 Threshold unless and until
         the aggregate of all such Rights-of-Way Losses incurred or sustained by
         the Buyer Indemnified Parties exceeds Four Million Dollars ($4,000,000)
         (the "Level 2 Threshold"). Thereafter, subject only to Section 15(l),
         Buyer shall have a claim under this Agreement against Seller for 100%
         of the excess of Rights-of-Way Losses over the Level 2 Threshold.
         Notwithstanding the foregoing, Seller shall have no obligation to
         indemnify the Buyer Indemnified Parties under this Agreement with
         respect to such matters for any Rights-of-Way Losses amounting to less
         than One Hundred Seventy-Five Thousand Dollars ($175,000) in the
         aggregate arising out of the same occurrence or matter.

                  (n) Mitigation. Each party hereto shall take all reasonable
         steps and use all commercially reasonable efforts to mitigate any and
         all Losses.

                  (o) Losses. As used in this Agreement, "Losses" means any and
         all costs, claims, losses, liabilities, obligations (including
         corrective and remedial obligations), damages and expenses (including
         reasonable legal fees and expenses but excluding any liability relating
         to consequential damages, lost profits or punitive damages).

         16. TAXES

                  (a) Except as provided in this Section 16, Buyer shall be
         liable for and pay all Taxes, utility charges or apportionments which
         arise as a result of this Agreement or the consummation of the
         transactions contemplated hereby or as a result of any purchase, sale,
         rental, lease, storage, use, consumption or operation of the Purchased
         Assets by Buyer. Seller agrees to cooperate with and assist Buyer in
         claiming any applicable occasional sale or other sales tax exemption;
         provided that Seller shall not incur any unreimbursed third party
         costs, expenses, fees or liabilities as a result of or in any way
         relating to, the provision of such assistance.


                                      -49-
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                  (b) General and special real estate and other ad valorem taxes
         and assessments and other state or local taxes, fees, charges and
         assessments in respect of real property on the basis of the fiscal year
         in which the Closing occurs shall be prorated between Buyer and Seller
         as of 12:01 a.m., Central Time, on the Closing Date. If the Closing
         Date shall occur before the tax rate or assessment is fixed for such
         fiscal year, the apportionment of such taxes and payments at the
         Closing shall be based upon the most recently ascertainable tax bills;
         provided, that Buyer and Seller shall recalculate and re-prorate said
         taxes and payments and make the necessary cash adjustments promptly
         upon the issuance, and on the basis, of the actual tax bills received
         for the fiscal year in which the Closing occurs and the amount of any
         payments in lieu of tax made with respect to any such fiscal year.

                  (c) Personal property taxes, if any, on the basis of the
         fiscal year in which the Closing occurs shall be prorated between Buyer
         and Seller as of 12:01 a.m., Central Time, on the Closing Date. If the
         Closing Date shall occur before the tax rate or assessment is fixed for
         such fiscal year, the apportionment of such taxes at the Closing shall
         be based upon a reasonable estimate mutually agreed upon by Buyer and
         Seller; provided that Buyer and Seller shall recalculate and re-prorate
         said taxes and make the necessary cash adjustments promptly upon the
         issuance of, and on the basis of, the actual tax bills received for
         such fiscal year.

         17. RECORDS/LITIGATION ASSISTANCE.

                  (a) For a period of seven (7) years following the Closing
         Date, Buyer shall provide to Seller and other members of the BP Group
         (and their counsel, auditors, accountants, agents, advisors or other
         representatives) reasonable access to and permission to take from the
         Business copies of any books, records or accounts relating to the
         Business through and including the Closing Date; and Buyer shall not
         destroy or dispose of any such books, records and accounts for a period
         of at least seven (7) years after the Closing Date without first
         offering to surrender to Seller such books, records and accounts which
         Buyer may intend to destroy or dispose of. Seller agrees that it will
         consult with Buyer in advance of taking any such actions following the
         Closing Date with a view towards establishing a mutually agreeable plan
         for such visits so that these actions will not unreasonably interfere
         with the normal operation of the Business.

                  (b) After the Closing Date, each party shall provide such
         assistance as the other party may from time to time reasonably request
         in connection with the preparation of tax returns required to be filed,
         any audit or other examination by any taxing authority, any judicial or
         administrative proceeding relating to liability for taxes, or any claim
         for refund in respect of such Taxes or in connection with any
         litigation and proceedings or liabilities related to the Business,
         including making available employees for interviews, litigation
         preparation and testimony. The requesting party shall reimburse the
         assisting party for the out-of-pocket costs incurred by the assisting
         party.


                                      -50-
   62
                  (c) If Buyer, as a result of the transactions contemplated by
         this Agreement, at any time within twelve (12) months after the Closing
         Date, is required to file with the Securities and Exchange Commission
         financial statements relating to the Business, Seller shall provide
         such assistance as Buyer may reasonably request in connection with the
         preparation of such financial statements, including providing to Buyer
         Seller's books, records or accounts relating to the Business and
         relevant personnel relating to the Business and access to Seller's
         independent auditors from the date hereof through and including the
         Closing Date and for a period of twelve (12) months thereafter;
         provided that Seller shall not incur any unreimbursed third-party
         costs, expenses, fees or liabilities as a result of or in any way
         relating to, the provision of such assistance.

         18. TERMINATION RIGHTS.

                  (a) This Agreement may be terminated at any time prior to the
         Closing Date as follows and in no other manner:

                           (i) By mutual written consent of Buyer and Seller;

                           (ii) By Buyer, if any of the conditions set forth in
                  Section 12 shall have become incapable of fulfillment, and
                  shall not have been waived by Buyer (provided, however, that
                  Buyer is not in material breach of its representations,
                  warranties, covenants or agreements contained in this
                  Agreement);

                           (iii) By Seller, if any of the conditions set forth
                  in Section 13 shall have become incapable of fulfillment, and
                  shall not have been waived by Seller (provided, however, that
                  Seller is not in material breach of its representations,
                  warranties, covenants or agreements contained in this
                  Agreement);

                           (iv) By Seller, if the Closing does not occur on or
                  prior to December 14, 2001;

                           (v) By Buyer, if the Closing does not occur on or
                  prior to December 31, 2001; provided, however, that in the
                  event that all conditions of Section 12 other than termination
                  or expiration of the waiting period under the HSR Act are
                  satisfied, then Buyer may not terminate under this clause (v)
                  until March 15, 2002; or

                           (vi) By Buyer, if a Deposit Return Event occurs.

                  (b) In the event of termination by Buyer or Seller pursuant to
         this Section 18, written notice thereof shall forthwith be given to the
         other party and the transactions contemplated by this Agreement shall
         be terminated, without further action by any party. If the transactions
         contemplated by this Agreement are terminated as provided herein:


                                      -51-
   63
                           (i) Buyer shall return to Seller all documents and
                  copies and other materials received from, or on behalf of,
                  Seller relating to the transactions contemplated hereby,
                  whether so obtained before or after the execution hereof; and

                           (ii) all confidential information received by Buyer
                  with respect to the Purchased Assets, the Assumed Liabilities
                  and the Business shall be treated in accordance with the terms
                  and conditions of the Confidentiality Agreement, which shall
                  remain in full force and effect notwithstanding the
                  termination of this Agreement.

                  (c) If this Agreement is terminated and the transactions
         contemplated hereby are abandoned as described in this Section 18, this
         Agreement shall become void and of no further force and effect, except
         for the provisions of:

                           (i) Section 10(b)(i) relating to the obligation of
                  Buyer to keep confidential certain information and data
                  obtained by it;

                           (ii) Section 22 relating to publicity;

                           (iii) Section 10(a)(i) relating to indemnification in
                  connection with the matters contemplated thereby;

                           (iv) Section 27 relating to certain
                  expenses;

                           (v) Sections 6(f) and 9(f) relating to finder's fees
                  and broker's fees; and

                           (vi) this Section 18.

             Nothing in this Section 18 shall be deemed to release any party
from any liability for any breach by such party of the terms and provisions of
this Agreement or to impair the right of any party to compel specific
performance by another party of its obligations under this Agreement.

         19. SPECIFIC PERFORMANCE. Each party hereto acknowledges and agrees
that the other party would be damaged irreparably in the event any of the
provisions of this Agreement are not performed in accordance with their specific
terms or otherwise are breached. Accordingly, each party hereto agrees that the
other party shall be entitled to an injunction or injunctions to prevent
breaches of the provisions of this Agreement and to enforce specifically this
Agreement and the terms and provisions hereof in any action instituted in any
court of the United States or any state thereof having jurisdiction over the
parties hereto and the matter (subject to the provisions set forth in Section 21
below), in addition to any other remedy to which they may be entitled, at law or
in equity.


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   64
         20. NOTICES.

             (a) All notices or other communications required or permitted to be
         given hereunder shall be in writing and shall be delivered by hand or
         sent by prepaid telex or telecopy, or sent, postage prepaid, by
         registered, certified or express mail, or reputable overnight courier
         service and shall be deemed given when so delivered by hand, telexed or
         telecopied, or if mailed, five (5) days after mailing (one (1) business
         day in the case of express mail or overnight courier service), as
         follows:

            If to Buyer:

                  Tesoro Petroleum Corporation
                  300 Concord Plaza Drive
                  San Antonio, TX
                  Attn: James C. Reed, Jr., General Counsel
                  Telecopy: (210) 283-2400

            with a copy to:

                  Fulbright & Jaworski, L.L.P.
                  1301 McKinney, Suite 5100
                  Houston, TX 77010-0395
                  Attn: Michael W. Conlon
                  Telecopy: (713) 651-5246

            If to Seller:

                  BP Corporation North America Inc.
                  200 East Randolph Drive
                  Chicago, IL 60601
                  Attn: Assistant General Counsel - Corporate
                  Telecopy: (312) 856-4091

                  Amoco Oil Company
                  200 East Randolph Drive
                  Chicago, IL 60601
                  Attn: Richard J. Battaglia
                  Telecopy: (312) 856-4091

             (b) Any party may change the address to which such
         communications are to be directed to it by giving written notice to the
         other in the manner in paragraph (a) above.


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   65
         21. GOVERNING LAW; SUBMISSION TO JURISDICTION. This Agreement and the
obligations of the parties hereunder shall be governed by and construed and
enforced in accordance with the substantive and procedural laws of the State of
Illinois, without regard to rules on choice of law. Any action to enforce the
terms hereof may be properly venued in, and shall be brought in, the federal or
state courts located in Cook County in the State of Illinois on a non-exclusive
basis. Each party hereto agrees that it shall submit to the jurisdiction of such
courts for purposes of actions to enforce the terms of this Agreement.

         22. PUBLICITY. Buyer and Seller agree that, from the date hereof
through and including the Closing Date, no public release or announcement
concerning the transactions contemplated hereby shall be issued or made by any
party hereto (including any member of the BP Group) without the prior consent of
the other party (which consent shall not be unreasonably withheld), except (a)
as such release or announcement may be required by law or the rules or
regulations of any securities exchange, whether in the United States, United
Kingdom or elsewhere, (or in the opinion of counsel such release or announcement
is appropriate or desirable under or in light of such laws and regulations), in
which case the party making the release or announcement shall allow the other
party reasonable time to comment on such release or announcement in advance of
such issuance, and (b) that any member of the BP Group, including Seller, may
make such an announcement to its employees. Notwithstanding the foregoing, Buyer
and Seller shall cooperate to prepare a joint press release to be issued on the
Closing Date and, upon the request of either Buyer or Seller, at the time of the
signing of this Agreement. Buyer and Seller agree to keep the terms of this
Agreement confidential, except to the extent required by applicable law or for
financial reporting purposes and except that the parties may disclose such terms
to their respective (and in the case of Seller, the BP Group's) counsel,
auditors, accountants, agents, advisors and other representatives as necessary
in connection with the ordinary conduct of their respective businesses (so long
as such Persons agree to keep the terms of this Agreement confidential).

         23. SURVIVAL OF COVENANTS, REPRESENTATIONS AND WARRANTIES. The
covenants and representations and warranties in this Agreement and in any other
document delivered in connection herewith shall survive the Closing solely for
purposes of Sections 15(a) and 15(b). The representations and warranties in this
Agreement shall terminate at the close of business on the second anniversary of
the Closing Date; provided, however, that the representations and warranties
provided in Section 6(e)(i) and (ii) with respect to the Real Property shall not
survive and shall terminate at the Closing.

         24. ENTIRE AGREEMENT. This Agreement, the attached Schedules and
Exhibits and the agreements referred to herein or executed simultaneously
herewith, set forth the entire agreement and understanding of the parties in
respect to the transactions contemplated hereby and thereby and supersede all
prior agreements, arrangements and undertakings, whether written or oral,
relating to the subject matter hereof (other than the Confidentiality Agreement
which shall continue in effect). No representation, promise, inducement or
statement of intention, whether written or oral, has been made by any party
which is not embodied in or superseded by this Agreement or the Confidentiality


                                      -54-
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Agreement or in the documents referred to herein, and no party shall be bound by
or liable for any alleged representation, promise, inducement or statement of
intention not so set forth whether in the Offering Memorandum, in certain "data
rooms," management presentations or any other form in expectation of the
transactions contemplated by this Agreement. Except as otherwise specifically
provided in this Agreement, no conditions, usage of trade, course of dealing or
performance, understanding or agreement purporting to modify, vary, explain or
supplement the terms or conditions of this Agreement will be binding unless
hereafter made in writing and signed by the party to be bound, and no
modification will be effected by the acknowledgment or acceptance of documents
containing terms or conditions at variance with or in addition to those set
forth in this Agreement, except as otherwise specifically agreed to by the
parties in writing.

         25. ASSIGNMENT. This Agreement and any rights and obligations hereunder
shall not be assignable or transferable by Buyer or Seller (including by
operation of law in connection with a merger or sale of stock, or sale of
substantially all the assets, of Buyer or Seller) without the prior written
consent of the other party and any purported assignment without such consent
shall be void and without effect; provided, however, that each of Buyer and
Seller may (a) assign any and all of its rights and interests hereunder to one
or more of its affiliates and (b) designate one or more of its affiliates to
perform its obligations hereunder; provided further that each of Buyer and
Seller shall remain responsible for the performance of all of its respective
obligations hereunder. Notwithstanding the foregoing, Seller may assign or
transfer any or all of its rights hereunder to any qualified intermediary in
order to complete an exchange of like-kind property under Section 1031 of the
Code and, at the request of Seller, Buyer shall execute such agreements and
other documents as may be necessary, in the reasonable opinion of Seller's
counsel, to complete and otherwise effectuate Seller's exchange of properties in
accordance with said Section 1031 of the Code and the regulations thereunder;
provided that Buyer shall not incur any unreimbursed third party costs,
expenses, fees or liabilities as a result of or connected with the exchange.

         26. AMENDMENT AND WAIVER. This Agreement may be amended, modified,
superseded or canceled, and any of the terms, covenants, representations,
warranties or conditions hereof may be waived, only by a written instrument
executed by the parties hereto, or, in the case of a waiver, by or on behalf of
the party waiving compliance. The failure of any party at any time or times to
require performance of any provision hereof shall in no manner affect the right
at a later time to enforce the same. No waiver by any party of any condition, or
of any breach of any term, covenant, representation or warranty contained in
this Agreement, in any one or more instances, shall be deemed to be or construed
as a further or continuing waiver of any such condition or breach or a waiver of
any other condition or of any breach of any other term, covenant representation
or warranty. No course of dealing between or among any Persons having any
interest in this Agreement shall be deemed effective to modify, amend or
discharge any part of this Agreement or any rights or obligations of any Person
under or by reason of this Agreement.

         27. EXPENSES. Whether or not the transactions contemplated hereby are
consummated, and except as otherwise specifically provided in this Agreement,
all costs and expenses incurred in

                                      -55-
   67
connection with this Agreement and the transactions contemplated hereby,
including legal, due diligence, accounting and investment banking fees and
expenses, shall be paid by the party incurring such costs or expenses.

         28. HEADINGS. The section and paragraph headings contained in this
Agreement are for reference purposes only, and shall not in any way affect the
meaning or interpretation of this Agreement.

         29. COUNTERPARTS. This Agreement may be executed simultaneously in one
or more counterparts (including by means of telecopied signature pages), all of
which shall be considered one and the same agreement, and shall become effective
when one or more such counterparts have been signed by each of the parties and
delivered to the other party.

         30. INTERPRETATION. Unless the context requires otherwise:

            (a) this Agreement includes this Asset Purchase Agreement and any
         other agreement entered into by Buyer and Seller on the Closing Date or
         in connection with the transactions contemplated hereby;

                  (b) the singular shall include the plural and the plural shall
         include the singular and any gender shall include all other genders,
         all as the meaning and the context of the Agreement shall require;

                  (c) references to Sections and paragraphs refer to sections
         and paragraphs, respectively, of this Agreement;

                  (d) references to Exhibits and Schedules are to exhibits and
         schedules attached to this Agreement, each of which is hereby
         incorporated and made a part of this Agreement for all purposes as if
         set forth in full herein;

                  (e) the words "including," "include," "includes" and all
         variants thereof mean "including, without limitation;" and

                  (f) all references to "Dollars" and "dollars" in this
         Agreement are to United States dollars.

         31. NO STRICT CONSTRUCTION. Notwithstanding the fact that this
Agreement has been drafted or prepared by one of the parties, Buyer and Seller
confirm that both they and their respective counsel have reviewed, negotiated
and adopted this Agreement as the joint agreement and understanding of the
parties, and the language used in this Agreement shall be deemed to be the
language chosen by the parties hereto to express their mutual intent, and no
rule of strict construction shall be applied against any Person.

                                      -56-
   68

         32. SCHEDULES. The disclosures in the Schedules hereto (including any
disclosures made in amendments made pursuant to Section 10(a)(iii)) are to be
taken as relating to the representations and warranties of Seller as a whole.
Matters listed once on the Schedules shall be deemed disclosed with reference to
all sections of the Schedules and all of Sections 6 and 7 of this Agreement. The
inclusion of information in the Schedules hereto shall not be construed as an
admission that such information is material to the Business, the Purchased
Assets, the Assumed Liabilities or Seller. In addition, matters reflected in the
Schedules are not necessarily limited to matters required by this Agreement to
be reflected in such Schedules. Such additional matters are set forth for
informational purposes only and do not necessarily include other matters of a
similar nature. Prior to the Closing, Seller shall have the right at all times
to supplement, modify or update the Schedules hereto; provided, however, that
any such supplements, modifications or updates shall be subject to the
provisions of Section 10(a)(iii). The Schedules are incorporated herein by
reference and made a part hereof.

         33. REPRESENTATION BY COUNSEL; INTERPRETATION. Buyer and Seller
acknowledge that each of them has been represented by counsel in connection with
this Agreement and the transactions contemplated hereby. Accordingly, any rule
of law or any legal decision that would require interpretation of any claimed
ambiguities in this Agreement against the party that drafted it has no
application and is expressly waived.

         34. SEVERABILITY. Whenever possible, each provision of this Agreement
shall be interpreted in such manner as to be valid and effective under
applicable law, but if any provision of this Agreement or the application of any
such provision to any Person or circumstance shall be held invalid, illegal or
unenforceable in any respect by a court of competent jurisdiction, such
invalidity, illegality or unenforceability shall not affect any other provision
hereof.

         35. BULK TRANSFER LAWS. Buyer hereby waives compliance by Seller with
the provisions of any so-called bulk transfer laws of any jurisdiction in
connection with the purchase and sale of the Purchased Assets. Seller shall
indemnify and hold Buyer harmless from any Losses which Buyer may incur due to
failure to so comply in accordance with Section 15.

         36. NO THIRD PARTY BENEFICIARIES. Except as provided with respect to
indemnification as set forth in Section 15 and elsewhere in this Agreement,
nothing in this Agreement shall confer any rights upon any Person other than the
parties hereto and their respective heirs, successors and permitted assigns.

         37. DEFINITION OF AFFILIATE. As used herein, the term "affiliate" shall
have the meaning set forth in Rule 405 promulgated under the Securities Act of
1933, as amended.

         38. TIME OF ESSENCE. With regard to all rights and obligations of the
parties and all dates and time periods set forth or referred to in this
Agreement, time is of the essence.


                                      -57-
   69

         39. NO CONDITIONS. For the avoidance of doubt, the only conditions to
closing are those set forth in Sections 12 and 13 herein, and no other covenants
or conditions set forth in this Agreement are intended to have any effect on the
Closing or the payment of the Purchase Price.

                                    * * * *


                                      -58-
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         IN WITNESS WHEREOF, the parties have duly executed this instrument as
of the day and year first above written.

                                   BP CORPORATION NORTH AMERICA INC.

                                   By: /s/ RICHARD J. BATTAGLIA
                                      --------------------------
                                        Richard J. Battaglia
                                   Title: Attorney-in-Fact


                                   AMOCO OIL COMPANY


                                   By: /s/ N. R. MORRIS
                                      --------------------------
                                        Neil R. Morris
                                   Title: Attorney-in-Fact

                                   TESORO PETROLEUM CORPORATION

                                   By: /s/ WILLIAM T. VAN KLEEF
                                      --------------------------
                                        William T. Van Kleef
                                   Title: Executive Vice President, Chief
                                          Operating Officer



                   Signature Page to Asset Purchase Agreement