EXHIBIT 2.1

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

                            ASSET PURCHASE AGREEMENT

                                  By and Among

                       BP CORPORATION NORTH AMERICA INC.,

                        BP PIPELINES (NORTH AMERICA) INC.

                                       and

                          TESORO PETROLEUM CORPORATION

                                   Dated as of

                                  July 16, 2001

                                 Relating to the

                                Purchase and Sale

         of the North Dakota Core Pipeline Interest and Related Assets


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


                                TABLE OF CONTENTS

<Table>
<Caption>

                                                                                                        Page
                                                                                                        ----
                                                                                                  
        1.      PURCHASE AND SALE OF THE PIPELINE INTEREST ............................................... 1

        2.      EXCLUDED ASSETS .......................................................................... 3

        3.      DEPOSIT AND PURCHASE PRICE ............................................................... 5
                         (a)    Deposit .................................................................. 5
                         (b)    Purchase Price ........................................................... 6
                         (c)    Closing Date Payments .................................................... 6

        4.      ASSUMPTION OF LIABILITIES ................................................................ 7

        5.      CLOSING ..................................................................................10

        6.      SELLER'S REPRESENTATIONS AND WARRANTIES ..................................................12
                         (a)    Organization and Good Standing ...........................................12
                         (b)    Authority ................................................................12
                         (c)    Consents .................................................................12
                         (d)    No Breach ................................................................13
                         (e)    Real Property ............................................................13
                         (f)    Brokers ..................................................................14
                         (g)    Machinery and Equipment ..................................................14
                         (h)    Compliance With Laws .....................................................14
                         (i)    Permits ..................................................................14
                         (j)    Actions and Proceedings ..................................................14
                         (k)    Assets ...................................................................15
                         (l)    Tangible Assets ..........................................................15

        7.      ENVIRONMENTAL MATTERS ....................................................................15
                         (a)    Environmental Representations and Warranties .............................15
                         (b)    Limitation ...............................................................16

        8.      DISCLAIMERS ..............................................................................16

        9.      BUYER'S REPRESENTATIONS AND WARRANTIES ...................................................18
                         (a)    Organization and Good Standing ...........................................18
                         (b)    Authority of Buyer .......................................................18
                         (c)    Consents .................................................................18
                         (d)    No Breach ................................................................18
                         (e)    Litigation ...............................................................18
                         (f)    Brokers ..................................................................18

</Table>

                                       i



<Table>
                                                                                                    
                         (g)    Availability of Funds ....................................................19
                         (h)    No Knowledge of Misrepresentations or Omissions ..........................19

        10.     COVENANTS ................................................................................19
                         (a)    Covenants of Seller ......................................................19
                         (b)    Covenants of Buyer .......................................................21
                         (c)    Mutual Covenants .........................................................24

        11.     EMPLOYEES ................................................................................27
                         (a)    Employees ................................................................27
                         (b)    Employment Offers to Active Employees ....................................27
                         (c)    Employment Offers to Employees on Leave ..................................27
                         (d)    Transfer Time ............................................................28
                         (e)    Level of Employee Benefits Provided by Buyer .............................28
                         (f)    Pension Plans ............................................................28
                         (g)    Defined Contribution Pension Plans .......................................28
                         (h)    Welfare Benefits and Other Benefits and Policies .........................29
                         (i)    Vacation .................................................................29
                         (j)    Severance ................................................................29
                         (k)    WARN Act .................................................................29
                         (l)    Service Credit ...........................................................30

        12.     BUYER'S OBLIGATION TO CLOSE ..............................................................30
                         (a)    Compliance with Agreement ................................................30
                         (b)    Representations and Warranties ...........................................30
                         (c)    Litigation ...............................................................30
                         (d)    Governmental Consents ....................................................31
                         (e)    Mandan Refinery ..........................................................31

        13.     SELLER'S OBLIGATION TO CLOSE .............................................................31
                         (a)    Compliance with Agreement ................................................31
                         (b)    Representations and Warranties ...........................................31
                         (c)    Litigation ...............................................................31
                         (d)    Governmental Consents ....................................................31

        14.     FURTHER ASSURANCES .......................................................................32

        15.     INDEMNIFICATION ..........................................................................32
                         (a)    Buyer's Indemnification of Seller ........................................32
                         (b)    Seller's Indemnification of Buyer ........................................32
                         (c)    Environmental Indemnifications ...........................................33
                         (d)    Exclusive Remedy .........................................................34
                         (e)    Procedures Relating to Indemnification Among Buyer and
                                Seller ...................................................................35
                         (f)    Procedures Relating to Indemnification for Third Party
</Table>


                                       ii


<Table>
                                                                                                    
                                Claims ...................................................................35
                         (g)    Losses Net of Insurance and Taxes ........................................36
                         (h)    Attorneys' Fees ..........................................................37
                         (i)    Time Limitation ..........................................................37
                         (j)    Monetary Limitation ......................................................37
                         (k)    Limitation of Liability ..................................................37
                         (l)    Environmental Remediation Monetary Limitation. ...........................37
                         (m)    Rights-of-Way Monetary Limitation. .......................................38
                         (n)    Mitigation ...............................................................38
                         (o)    Losses ...................................................................38

        16.     TAXES ....................................................................................38

        17.     RECORDS/LITIGATION ASSISTANCE ............................................................39

        18.     TERMINATION RIGHTS .......................................................................40

        19.     SPECIFIC PERFORMANCE .....................................................................41

        20.     NOTICES ..................................................................................42

        21.     GOVERNING LAW; SUBMISSION TO JURISDICTION ................................................43

        22.     PUBLICITY ................................................................................43

        23.     SURVIVAL OF COVENANTS, REPRESENTATIONS AND
                WARRANTIES ...............................................................................43

        24.     ENTIRE AGREEMENT .........................................................................43

        25.     ASSIGNMENT ...............................................................................44

        26.     AMENDMENT AND WAIVER .....................................................................44

        27.     EXPENSES. ................................................................................44

        28.     HEADINGS .................................................................................45

        29.     COUNTERPARTS .............................................................................45

        30.     INTERPRETATION ...........................................................................45

        31.     NO STRICT CONSTRUCTION ...................................................................45

        32.     SCHEDULES ................................................................................45

</Table>

                                       iii


<Table>
                                                                                                        

        33.     REPRESENTATION BY COUNSEL; INTERPRETATION .................................................46

        34.     SEVERABILITY ..............................................................................46

        35.     BULK TRANSFER LAWS ........................................................................46

        36.     NO THIRD PARTY BENEFICIARIES ..............................................................46

        37.     DEFINITION OF AFFILIATE ...................................................................46

        39.     NO CONDITIONS .............................................................................46
</Table>

                                       iv




                                    SCHEDULES

<Table>
<Caption>

             SCHEDULE            DESCRIPTION
             --------            -----------
                          
               1(a)          Pipeline Assets
               1(c)          Contracts
               2(c)          Excluded Assets Related to Support and Other Services
                             Provided to the Pipeline Interest by the BP Group
               2(o)          Other Excluded Assets
               2(p)          Excluded Contracts
               2(r)          Intercompany Agreements
               6(c)          Consents
               6(d)          No Breach
               6(e)          Real Property
               6(h)          Compliance with Laws
               6(i)          Permits
               6(j)          Actions and Proceedings
               6(k)          Assets
               6(l)          Tangible Assets
               7(a)          Environmental Matters
             10(a)(ii)       Conduct of Business by Seller
              11(a)          Employees
</Table>


                                       v


                                    EXHIBITS

<Table>
<Caption>

EXHIBIT                          DESCRIPTION
- -------                          -----------
                  
A                    Form of Technology Agreement
B                    Form of Deed for the Pipeline Real Property
C                    Form of Assignment of Pipeline Agreements
D                    Form of Transition Services Agreement
</Table>


                                       vi

                             INDEX TO DEFINED TERMS

<Table>
<Caption>

TERM                                                                                                        PAGE
- ----                                                                                                        ----
                                                                                                         
Agreement .................................................................................................1, 30
Asbestos-Related Liabilities ..................................................................................8
Assumed Liabilities ...........................................................................................7
BP ............................................................................................................1
BP Group ......................................................................................................2
BP Pipelines ..................................................................................................1
BP RAP .......................................................................................................28
BP Severance Plan ............................................................................................29
Buyer .........................................................................................................1
Buyer Indemnified Parties ....................................................................................33
Buyer Pension Plan ...........................................................................................28
CERCLA ........................................................................................................8
Closing ......................................................................................................10
Closing Date .................................................................................................10
Code .........................................................................................................11
Confidentiality Agreement ....................................................................................19
Data .........................................................................................................19
Deposit .......................................................................................................5
Deposit Return Event ..........................................................................................5
Disclosed Environmental Liabilities ...........................................................................8
Employees ....................................................................................................27
Environmental Permits .........................................................................................2
Excluded Assets ...............................................................................................3
Excluded Liabilities ..........................................................................................9
Final Orders .................................................................................................30
First Threshold ..............................................................................................37
H-S-R Act ....................................................................................................10
Health, Safety and Environmental Laws .........................................................................8
Indemnification Notice .......................................................................................35
Indemnified Party ............................................................................................35
Indemnifying Party ...........................................................................................35
knowledge ....................................................................................................12
Leave ........................................................................................................27
Level 1 Threshold ............................................................................................38
Level 2 Threshold ............................................................................................38
Losses .......................................................................................................38
Offering Memorandum ...........................................................................................8
Offsite Environmental Liabilities ............................................................................10
ordinary course of business ...................................................................................3
Permits .......................................................................................................2
Permitted Liens ..............................................................................................14
Person .......................................................................................................13
</Table>

                                      vii




<Table>
<Caption>

TERM                                                                                                        PAGE
- ----                                                                                                        ----
                                                                                                         
Personal Property .............................................................................................1
Pipeline Agreements ...........................................................................................1
Pipeline Interest .............................................................................................1
Pipeline Real Property ........................................................................................1
Pipelines .....................................................................................................1
Purchase Price ................................................................................................6
Purchased Assets ..............................................................................................1
Remediation Losses ...........................................................................................33
Rights-of-Way Losses .........................................................................................33
Schedules ....................................................................................................45
Second Threshold .............................................................................................38
Seller ........................................................................................................1
Seller Indemnified Parties ...................................................................................32
Seller Information ...........................................................................................22
Seller Vacation Policy .......................................................................................29
Seller's knowledge ...........................................................................................12
Taxes .........................................................................................................3
Technology Agreement ..........................................................................................2
Third Party Claim ............................................................................................35
Threshold ....................................................................................................37
Transferred Employees ........................................................................................27
Transition Services Agreement ................................................................................26
WARN Obligations .............................................................................................29
</Table>

                                      viii


                            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 BP
Pipelines (North America) Inc., a Maine corporation ("BP Pipelines," 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 interest in the assets constituting those
certain pipelines and certain liabilities, each as further described in Sections
1 and 4 (the "Pipeline Interest") located in Montana and North Dakota, and used
to transport crude oil, and Buyer wishes to purchase such assets 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 PIPELINE INTEREST. 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 Pipeline Interest (the
"Purchased Assets"):

                  (a) subject to Section 2(h), Seller's interest in the
         pipelines and all real property interests used to transport crude oil,
         as more particularly described on Schedule 1(a) attached hereto
         (collectively, the "Pipelines"), including but not limited to:

                           (i) the real property owned by Seller on which pump
                  stations and booster stations are situated, as more
                  particularly described on Schedule 1(a)(i) attached hereto,
                  including the improvements to such real property, together
                  with all appurtenances, rights and benefits related thereto
                  and the fixtures thereon (the "Pipeline Real Property"); and

                           (ii) subject to Section 10(c)(ii), all assignable or
                  transferable easements, rights-of-way, permits, licenses,
                  leases and other rights of access relating to the Pipelines
                  (the "Pipeline Agreements");

         (b) the machinery, equipment, vehicles, and other personal property
owned and used exclusively in the operation of the Pipeline Interest as it is
currently operated by Seller (collectively, the "Personal Property");






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

         (d) 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 Pipeline Interest 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 Pipeline Interest, for the ownership or operation of the Pipeline
Interest as it is currently operated by Seller (collectively, the "Environmental
Permits");

         (e) subject to and in accordance with the Technology Transfer and
License Agreement attached hereto as Exhibit A (the "Technology Agreement"), a
nonexclusive, royalty-free license to use in the operation of the Pipeline
Interest 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
"BP Group"), whether patented or unpatented, as more specifically described in
the Technology Agreement;

         (f) subject to Section 2(e), 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 Pipeline Interest 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;

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

         (h) all other assignable or transferable assets, active or inactive,
operating or abandoned, owned or leased by, or licensed to or used by Seller and
located at the Purchased Assets and used exclusively in the operation of the
Pipeline Interest as it is currently operated by Seller; 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
                                       2

         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 Pipeline Interest, the Closing and any
         other transaction contemplated by this Agreement, so long as such
         actions do not have a material adverse effect on the Pipeline Interest,
         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, 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 as of 12:01 a.m., Central
         Time, on the Closing Date;

                  (c) assets owned by other members of the BP Group, not used
         exclusively by Seller in the operation of the Pipeline Interest or not
         located at the Purchased Assets, 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
         Pipeline Interest as described on Schedule 2(c) attached hereto and
         certain other specified assets not located at the Purchased Assets as
         described on Schedule 2(c) attached hereto, including assets owned by
         or located at the pipeline control center in Tulsa, Oklahoma;

                  (d) 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;

                  (e) all forecasts, financial information or financial
         statements and proprietary manuals (except rights to use manuals
         specific to and necessary for the operation of the Pipeline Interest 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 not relating exclusively to the Pipeline
         Interest and all copies of and subscriptions to third-party reports;




                                       3



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

                  (g) 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;

                  (h) any assets, property improvements, appurtenances,
         fixtures, equipment or goods located at the Purchased Assets which are
         not owned by Seller, including spare parts on consignment, certain
         chemicals on consignment, leased and rented mobile equipment, leased
         office equipment, copiers, telephones and other leased items;

                  (i) 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 Pipeline Interest as it is
         currently operated by Seller or not otherwise assignable by Seller;

                  (j) 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;

                  (k) 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 Pipeline Interest;

                  (l) 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;

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

                  (n) employment records, including personnel records and
         medical records, relating to employees of the Pipeline Interest 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;

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


                                       4



                  (p) 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 Pipeline
         Interest or are not assignable by Seller, including those set forth on
         Schedule 2(p) attached hereto;

                  (q) any rights under or amounts payable from present or
         former insurance policies applicable to the Pipeline Interest; and

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

         To the extent that any Excluded Assets remain located at the Pipelines
         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 Pipeline Interest.

         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 all
         interests in real property) in an amount equal to Five Million Dollars
         ($5,000,000) (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 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 Seventeen Million Two Hundred


                                       5



         Thousand Dollars ($17,200,000), 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, except
         with respect to the fulfillment of the conditions set forth in Section
         12(e) for which the material breach of Buyer's representations,
         warranties, covenants or agreements contained herein shall be ignored;

                  (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:

                  (i) Buyer shall pay to Seller (or Seller's designee) in cash a
         price of Ninety Million Dollars ($90,000,000), representing the value
         of the Purchased Assets as of the Closing Date (the "Purchase Price");
         and

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

                  (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 Purchase Price
         minus 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.


                                       6



         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 Pipeline Interest 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 Pipelines, the Pipeline Real Property
                                    and the Personal Property;

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

                           (C)      the Permits;

                           (D)      all accounts payable and accrued liabilities
                                    relating to goods and/or services provided
                                    to the Pipeline Interest on or after the
                                    Closing Date;

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

                           (F)      all actions, grievances, arbitrations,
                                    suits, liabilities, obligations, proceedings
                                    and investigations of, relating to or
                                    arising out of the business or operations of
                                    the Pipeline Interest 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,


                                       7

                  arising from, incurred in connection with or relating in any
                  way to the ownership of the Purchased Assets or the operation
                  of the Pipeline Interest 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 Pipeline Interest 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 April 20,
                  2001, a copy of which previously has been provided to Buyer,
                  in the Confidential Information Memorandum for the Pipeline
                  Interest dated March 2001 (the "Offering Memorandum") or in
                  any of the health, safety and environmental records or reports
                  of the Pipeline Interest previously provided to Buyer
                  (collectively, the "Disclosed Environmental Liabilities"); and
                  (C) any and all obligations, responsibilities, liabilities,
                  compliance costs and expenses relating to governmental
                  requirements including mandated clean-up, fines and penalties.

                           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, as amended, 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.

                                       8

                           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;

                         (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, in each case, determined in accordance with
                  generally accepted accounting principles as in effect in the
                  United States at the Closing Date;

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

                         (vii) except as otherwise 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(j) 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 Pipeline Interest 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 Health,
                  Safety and Environmental Laws, relating to the pre-Closing
                  operation of the Pipeline Interest; 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


                                       9


                  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
                  Health, Safety and Environmental 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
                  Pipeline Interest (the "Offsite Environmental Liabilities");

                           (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 Pipeline Interest 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, a
         business day which is not later than five (5) business days after the
         last to occur of (A) 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 and (B) the notification of
         approval by the Public Service Commission of North Dakota. 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 deeds for the Pipeline Real
                  Property, substantially in the form of Exhibit B attached
                  hereto;

                           (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);




                                       10


                           (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 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 BP Pipelines' good standing in Maine and BP's and
                  BP Pipelines' qualification to do business and good standing
                  in Montana and North Dakota; 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; and

                           (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 Montana and North Dakota.

                  (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 A;





                                       11


                           (ii) subject to Section 10(c)(ii), the Assignment of
                  Pipeline Agreements substantially in the form of Exhibit C
                  attached hereto for the Pipeline Agreements; and

                           (iii) subject to Section 10(c)(iii), the Transition
                  Services Agreement substantially in the form of Exhibit D
                  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 Patrick H. McGrath, Howard Fox and Joseph A. Cappa. 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. BP Pipelines is a corporation duly organized, validly
         existing and in good standing under the laws of the State of Maine.

                  (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 regulatory approvals of the Public Service
         Commission of North Dakota and (iii) obtaining the consents required in
         connection with the Pipeline Agreements and certain agreements,
         contracts, licenses, leases, easements, rights-of-way and permits, 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





                                       12


         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 Pipeline
         Interest, taken as a whole, as it is currently operated by Seller.

                  (d) No Breach. Subject to obtaining the consents required in
         connection with the Pipeline Agreements and 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 Pipeline Interest, 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. Title to the Pipeline 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) 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 B; (J) acts done or
         suffered to be done by, and





                                       13


         judgments against, Buyer and those claiming by, through or under Buyer
         (collectively, (A) through (J) are referred to herein as the "Permitted
         Liens").

                  (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.

                  (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 Pipeline Interest 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 Pipeline Interest,
         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 Pipeline
         Interest, taken as a whole, as it is currently operated by Seller,
         except for (i) Environmental Permits (which are addressed in Section 7)
         and, (ii) 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 operation of the Pipeline Interest,
         taken as a whole, as it is currently operated by Seller.
         Notwithstanding the foregoing, this Section 6(i) shall not apply to the
         real property of the Pipelines, including the Pipeline Agreements, any
         Pipelines rights-of-way, Permits, licenses and other real property
         rights.

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

                           (i) there is no action, suit, arbitration or
                  regulatory 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




                                       14


                  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.

                  (k) 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(k), 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
         Pipeline Interest immediately following the Closing Date substantially
         in the manner in which the Pipeline Interest 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 Pipeline Interest, taken as a whole, as it is currently operated by
         Seller.

                  (l) Tangible Assets. The Purchased Assets, excluding all
         rights-of-way, permits, licenses, leases and other rights of access
         relating to the 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, current usage, normal wear and
         tear and continued repair and replacement in accordance with Seller's
         past practice).

         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 Pipeline Interest 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 Pipeline Interest, taken as a whole, as it is
                  currently operated by Seller;

                           (ii) all environmental control equipment necessary
                  for the operation of the Pipeline Interest 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 Pipeline Interest by
                  Seller, is installed at the Purchased Assets,




                                       15


                  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 Pipeline
                  Interest, 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 Pipeline
                  Interest by Seller, which, individually or in the aggregate,
                  would have a material adverse effect on the Pipeline Interest,
                  taken as a whole, as it is currently operated by Seller.

                  (b) Limitation. The representations and warranties set forth
         in Section 7(a) 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 PIPELINE
         INTEREST, THE PURCHASED ASSETS OR THE ASSUMED LIABILITIES OR ANY
         PORTION THEREOF, INCLUDING THE PIPELINES OR ANY OTHER ASSET TRANSFERRED
         TO BUYER PURSUANT TO THE TERMS OF THIS AGREEMENT, 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 PIPELINES, ANY PORTION
         THEREOF 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 (I) THE CONDITION OR
         MERCHANTABILITY OF ANY OF THE PURCHASED ASSETS, INCLUDING THE
         PIPELINES, ANY PORTION THEREOF OR ANY OTHER ASSETS TRANSFERRED TO BUYER
         PURSUANT TO THE TERMS AND CONDITIONS OF THIS AGREEMENT, (II) THE
         FITNESS OF ANY




                                       16


         ASSETS FOR ANY PURPOSE, OR (III) THE ASSIGNABILITY, COMPLETENESS OR
         CONTIGUITY OF ANY PIPELINES RIGHTS-OF-WAY, THE PIPELINE AGREEMENTS,
         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
         PIPELINE INTEREST, 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
         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

                  (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




                                       17


         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 this
         Agreement 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 (i) the H-S-R Act and
         (ii) obtaining the regulatory approvals of the Public Service
         Commission of North Dakota, no consent, approval of or by, or filing
         with or notice to any other Persons is required with respect to Buyer
         in 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




                                       18


         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 Pipelines for the reasonably foreseeable future and to meet
         the Pipeline Interest'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,
                  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 Purchased
                  Assets and the books and records and other information
                  relating to the operations of the Pipeline Interest. 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
                  Purchased Assets and the operation of the Pipeline Interest
                  (the "Data") 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 of or suppliers to
                  the Pipeline Interest 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 Pipeline
                  Interest 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 and others having business relationships with the
                  Pipeline Interest; use commercially reasonable efforts to




                                       19


                  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 Pipeline Interest, (C)
                  commencing any new capital projects or making any additional
                  commitments for capital expenditures relating to the Pipeline
                  Interest in excess of Five Hundred Thousand Dollars ($500,000)
                  in the aggregate, or (D) granting or agreeing to grant any
                  bonus to any employees of the Pipeline Interest, 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 of the ordinary course of business; provided
                  that 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 Pipeline
                                    Interest, 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 Pipeline




                                       20


                                    Interest only if such adverse effect exceeds
                                    Five Million Dollars ($5,000,000).

                           (C)      In the event that the parties hereto are
                                    unable to agree upon on 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 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
                                    pipeline 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 Pipeline Interest,
                  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).

                  (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,





                                       21


                                    officers, employees, counsel, auditors,
                                    accountants, agents, advisors and other
                                    representatives is subject to the terms of
                                    the Confidentiality 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 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 documents
                                    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 and/or any other member of
                                    the BP Group, other than information that
                                    relates exclusively to the Pipeline
                                    Interest, 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).




                                       22


                           (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 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
                  offices and facilities related to the Pipeline Interest; 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. In addition, Buyer agrees that, within three (3) months
                  after





                                       23


                  the Closing Date, Buyer shall replace all signs located along
                  each Pipeline, including at river crossings, that identify BP,
                  BP Pipelines or any other member of the BP Group as the
                  operator of such Pipeline.

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

                           (i) H-S-R/State Regulatory Approvals. Buyer and
                  Seller shall each file or cause to be filed with (A) the
                  Federal Trade Commission and the United States Department of
                  Justice any notifications required to be filed under the H-S-R
                  Act and (B) the Public Service Commission of North Dakota the
                  application required to be filed pursuant to applicable law,
                  in each case 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
                  fourteen (14) 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, to cause the waiting periods under
                  the H-S-R Act to terminate or expire at the earliest possible
                  date, to successfully complete the approval process before the
                  Public Service Commission of North Dakota 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 or are adverse to the public interest, 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
                                    Pipeline Interest 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,





                                       24


                                    right-of-way or Permit is required to be
                                    amended or supplemented and is not so
                                    amended or supplemented as of the Closing
                                    Date, and such assignment is reasonably
                                    necessary to conduct the operation of the
                                    Pipeline Interest in the ordinary course of
                                    business without giving rise to a material
                                    adverse effect on the Pipeline Interest, 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 Purchased Assets.

                           (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. 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 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





                                       25


                                    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
                                    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





                                       26


                  Closing. Such services may include any technical and/or
                  managerial support required to operate the Business.

                           (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 Pipeline
                  Interest 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.

         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 Pipeline Interest (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"). Seller shall be
         entitled 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 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
         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." 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
         Employee no less than seven (7) days in which to accept or reject
         Buyer's employment offer.

                  (c) Employment Offers to 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 Employee who is on Leave as of the
         Closing Date, commencing at such time as such 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
         Employee's Leave; provided, however, that such Employee is ready to
         return to work within one hundred twenty (120) days after the Closing
         Date. Buyer will give each Employee on Leave no less than seven (7)
         days in which to accept or reject Buyer's employment offer.





                                       27


                  (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 an Employee on Leave, such obligations shall
         not attach until the Employee on Leave commences employment with Buyer.

                  (e) Level of Employee Benefits Provided by Buyer. Buyer shall
         provide to all 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 the day 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.





                                       28


                  (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 Transferred Employee who has
         actions taken against such Transferred Employee within eighteen (18)
         months after the Closing Date that would make the 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 Transferred Employees'
         recognized credited service amounts with Seller or other members of the
         BP Group.

                  (k) 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





                                       29


         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.

                  (l) 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.

                  (m) 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.

                  (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 (i) contained in Section 6(j) with
         respect to appeals from and rehearings of Final Orders and (ii) 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. As used in this Agreement, "Final Orders"
         means approval by the Public Service Commission of North Dakota without
         regard to whether such approval is subject to rehearing or appeal to
         the extent that the consummation of the transactions contemplated by
         this Agreement is permitted by law.

                  (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. Except
         for appeals from and rehearings of Final Orders, 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





                                       30


         contemplated by this Agreement, or operation of the Pipeline Interest
         by Buyer after the Closing Date.

                  (d) Governmental Consents. (i) 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 (ii) the transactions contemplated by this Agreement
         shall have been authorized in Final Orders by applicable governmental
         authorities, including the Public Service Commission of North Dakota.

                  (e) Mandan Refinery. Buyer shall have consummated the
         acquisition of the Mandan Refinery and related assets pursuant to that
         certain Asset Purchase Agreement by and among BP, Amoco Oil Company and
         Buyer, dated as of the date hereof.

         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. Except
         for appeals from and rehearings of Final Orders, 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 the operation of the Pipeline Interest by Buyer
         after the Closing Date.

                  (d) Governmental Consents. (i) 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 (ii) the transactions contemplated by this Agreement
         shall have been authorized in Final Orders by applicable governmental
         authorities, including the Public Service Commission of North Dakota.





                                       31


         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 Pipelines, and the operation of the Pipeline Interest 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 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 if 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,





                                       32


         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
                  Excluded Liabilities, the provisions of Sections 15(i) through
                  15(k) will not apply to indemnity claims by Buyer relating to
                  Sections 4(b)(i) through (vi) and 4(b)(ix) through (xii).

                           (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, no occurrence relating to Seller's representation
                  contained in Section 6(k) shall be deemed to be material or
                  have a material adverse effect on the Pipeline Interest unless
                  such effect or adverse effect exceeds Two Million Five Hundred
                  Thousand Dollars ($2,500,000);

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

                           (iv) subject to the limitations set forth in Section
                  15(l), 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
                  Pipeline Interest ("Remediation Losses"); and

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





                                       33


                  of Seller's representations and warranties in Section 7, and
                  (B) the Excluded Liabilities described in Section 4(b)(x)
                  (provided, however, that the provisions of Section 15(j)
                  through 15(m) will not apply to indemnity claims by Buyer
                  relating to Section 4(b)(x) or 4(b)(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 Pipeline Interest,
                  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 or the Disclosed
                  Environmental Liabilities 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;

                  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





                                       34


         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
         Pipeline Interest, 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.

                  (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





                                       35


                  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, 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





                                       36


         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.

                  (i) Time Limitation. Except as otherwise provided herein, 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 Two Million Five
         Hundred Thousand Dollars ($2,500,000) and then only for the excess over
         Two Million Five Hundred Thousand Dollars ($2,500,000) (the
         "Threshold"); provided that Losses amounting to less than Two Hundred
         Thousand Fifty 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 Section 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 Thirty One Million Five
         Hundred Thousand Dollars ($31,500,000).

                  (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 Two
         Million Five Hundred Thousand Dollars ($2,500,000), and then only for
         the excess over Two Million Five Hundred Thousand Dollars ($2,500,000)
         (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 Five





                                       37


         Million Dollars ($5,000,000) (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, 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(k),
         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 Fifty 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 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.





                                       38


                  (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 copies of
         any books, records or accounts relating to the Pipeline Interest
         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 Pipeline Interest.

                  (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 Pipeline
         Interest, 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.

                  (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 Pipeline Interest,





                                       39


         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
         Pipeline Interest and relevant personnel relating to the Pipeline
         Interest 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, except with respect to the fulfillment of the
                  conditions set forth in Section 12(e) for which the material
                  breach of Buyer's representations, warranties, covenants or
                  agreements contained herein shall be ignored);

                           (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 February 1, 2002;

                           (v) by Buyer, if the Closing does not occur on or
                  prior to February 1, 2002; 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 and the
                  issuance of Final Orders by the Public Service Commission of
                  North Dakota are satisfied, then Buyer may not terminate under
                  this clause (v) until June 30, 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:





                                       40


                           (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 Pipeline Interest 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.





                                       41


         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, Texas
                        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, Texas
                        Attn: Michael W. Conlon, Esq.
                        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

                        BP Pipelines (North America) Inc.
                        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.





                                       42


         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) with respect to the Pipeline 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
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





                                       43


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 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.





                                       44


         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.

         32. SCHEDULES. The disclosures in the schedules hereto (including any
disclosures made in amendments made pursuant to Section 10(a)(iii)) (the
"Schedules") 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
Pipeline Interest, the Purchased Assets, the Assumed Liabilities or Seller. In
addition, matters reflected in the Schedules are not





                                       45


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.

         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.

                                      ****





                                       46


         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
                                     ------------------------------------------
                                     Name:   Richard J. Battaglia
                                     Title:  Attorney In Fact


                                 BP PIPELINES (NORTH AMERICA) INC.


                                 By: /s/ NEIL R. MORRIS
                                     ------------------------------------------
                                     Name:   Neil R. Morris
                                     Title:  Attorney In Fact


                                 TESORO PETROLEUM CORPORATION


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