Document:

exv10w10

 

Exhibit 10.10

OPERATING AGREEMENT

     THIS AGREEMENT, entered into as of the sixth day of May, 1993, by and between REFINERY
HOLDING COMPANY L.P., a Delaware limited partnership (“RHC”), and CHEVRON U.S.A. INC, a
Pennsylvania corporation (“Chevron”).

W I T N E S S E T H:

     WHEREAS, Chevron owns and operates a petroleum products refinery located at 6501 Trowbridge
Drive, El Paso, Texas (the “Chevron Refinery”);

     WHEREAS, concurrently herewith RHC has acquired the currently closed petroleum products
refinery located at 6500 Trowbridge Drive, E1 Paso, Texas (the “EPR Refinery”);

     WHEREAS, RHC and Chevron believe that significant efficiencies and synergies can be achieved
by utilizing certain of the processing units at the EPR Refinery in connection with the refining of
crude oil at the Chevron Refinery and Chevron has trained personnel qualified to operate the EPR
Refinery;

     WHEREAS, RHC is willing to allow Chevron to utilize various operating units at the EPR
Refinery in connection with Chevron’s operations at the Chevron Refinery; and

     WHEREAS; RHC desires that from time to time (as RHC may request) Chevron process for RHC
certain quantities of crude oil into finished petroleum products and Chevron is willing to do so on
the terms and conditions set forth herein;

     NOW, THEREFORE, the parties hereto agree as follows:

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     1. Term.

          The initial term of this agreement shall commence on the date of this agreement (the
“Commencement Date”), and shall continue until December 31, 2003. Chevron shall have the option to
extend such initial term for two successive periods of five years each by giving RHC at least one
year’s prior written notice of Chevron’s intention to exercise each such option. If Chevron fails
to exercise either such option, RHC shall have during the remainder of the term of this agreement
(i) a right of first refusal to purchase the Chevron Refinery and (ii) the right to purchase the
Chevron Refinery at the book value thereof.

     2. Use of EPR Facilities.

          (a) During the term of this agreement, Chevron shall have the exclusive right to utilize all
facilities and equipment at the EPR Refinery except those specified in Exhibit A (the “Excluded
Facilities”). (The facilities and equipment at the EPR Refinery which Chevron has the exclusive
right to use during the term hereof, i.e., all facilities at the EPR Refinery other than the
Excluded Facilities, are hereinafter referred to as the “Designated Facilities”.) The Designated
Facilities shall, to the extent rights thereto are acquired by RHC (and RHC shall use all
commercially reasonable efforts to obtain such rights), include all equipment and facilities
located on pipeline and utility rights of way appurtenant to the EPR Refinery, including but not
limited to those described in Exhibit B. Chevron shall at all times have the right at its own
expense to make such modifications, rearrangements or additions to the Designated Facilities as
Chevron may deem desirable to provide for the appropriate operation of the Designated Facilities in
conjunction with the Chevron Refinery (the Designated Facilities and the Chevron Refinery being
sometimes hereinafter collectively referred to as the “Combined Facility”). Chevron, at its own
expense, shall cause the major processing units included within the Designated Facilities to

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be maintained in good order and repair, subject to normal wear and tear, in accordance with
normal industry practice, and in accordance with the same standards applied by Chevron to the
maintenance of the Chevron Refinery and other refineries in Chevron’s U.S. refinery system.
Chevron shall diligently endeavor to comply with all governmental laws, rules, regulations, orders,
permits and licenses applicable to the maintenance and operation of the Designated Facilities.
Title to any improvements, changes, rearrangements, repairs, replacements (excluding vehicles), or
reconfigurations made by Chevron to the Designated Facilities shall immediately vest in RHC.
Chevron may abandon, and shall have no obligation to maintain, all equipment and facilities
included within the Designated Facilities other than major processing units, and also may abandon,
and shall have no obligation to maintain, major processing units included within the Designated
Facilities which have reached the end of their useful life as reasonably determined by Chevron in
accordance with normal industry practice. Whenever Chevron elects to abandon any such equipment,
it shall give RHC written notice of such abandonment. Chevron shall have the right, by written
notice to RHC given prior to the end of the Transition Period referred to in Section 5, to add to
the Excluded Facilities any storage tanks which Chevron elects not to utilize. RHC shall be
responsible for any costs and expenses associated with disposing of any wastes that may be located
in any such tanks so added to the Excluded Facilities.

          (b) RHC may use the Excluded Facilities for any purpose which does not interfere with the
operation of the Designated Facilities and the Chevron Refinery.

          (c) RHC shall use its best efforts to cause all governmental permits necessary for the
operation of the Designated Facilities to be transferred to Chevron or, if such permits are not
transferable, shall cooperate fully with Chevron’s efforts to obtain new permits in Chevron’s name
with regard to the Designated Facilities. RHC shall cooperate fully with Chevron’s efforts

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           to obtain any necessary new permits for connections between the Chevron Refinery and the
Designated Facilities. Chevron shall keep RHC fully advised of all significant developments with
regard to obtaining such permits. If any such permits have not been transferred to Chevron or
Chevron has not been able to obtain any such necessary new permits in its own name within six
months following the Commencement Date, Chevron shall have the right to terminate this agreement by
written notice to RHC.

          (d) Upon termination of this agreement, Chevron shall have the right, but not the obligation,
to remove from the EPR Refinery any new process unit added to the EPR Refinery by Chevron and any
connections between the Designated Facilities and the Chevron Refinery; provided, however if RHC
determines in good faith that failure to remove any such new unit shall be a material burden for
RHC, RHC shall have the right to require that Chevron remove the same. Upon such removal Chevron
shall repair any damage that may have been occasioned thereby. Upon the termination of this
agreement, Chevron shall return possession of all major processing units within the Designated
Facilities to RHC in good working order, except for any such major processing units previously
abandoned by Chevron pursuant to Section 2(a).

     3. Processing Agreement.

          (a) Chevron agrees to process West Texas Intermediate crude oil at the Combined Facility for
RHC during the term of this agreement. All crude oil to be processed on behalf of RHC shall meet
the quality requirements set forth in Exhibit C.

          (b) For all crude oil provided to Chevron by RHC and processed hereunder by Chevron for RHC,
Chevron shall deliver to RHC a 95% yield (based on the volume of crude oil processed) of petroleum
products, as follows: (60% regular unleaded motor gasoline, 20% jet fuel (including 2,000 barrels
per day of military jet fuel), 10% low sulphur diesel fuel, and 5%

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high sulfur diesel fuel. For example, for each 25,000 barrels of West Texas Intermediate
crude oil processed by Chevron for RHC, RHC shall be entitled to receive 15,000 barrels of regular
unleaded motor gasoline, 3,000 barrels of commercial jet fuel, 2,000 barrels of military jet fuel,
2,500 barrels of low sulfur diesel fuel, and 1,250 barrels of high sulfur diesel fuel. All such
products shall conform to the quality specifications set forth in Exhibit D. Notwithstanding the
foregoing, it is understood and agreed that military jet fuel and low sulfur diesel fuel shall not
be available to RHC until October 1, 1993, and that prior to such date, RHC shall receive
commercial jet fuel in lieu of military jet fuel and high sulfur diesel fuel in lieu of low sulfur
diesel fuel.

          (c) In consideration for such crude oil processing, RHC shall pay to Chevron a processing fee
of $1.20 per barrel of crude oil processed, payable by wire transfer of immediately available funds
on the last business day of the month following the month in which such processing occurs. Such
processing fee shall be subject to adjustment during the term of this agreement as provided in
Exhibit E.

          (d) To the extent nominated by RHC pursuant to Section 3(g), Chevron shall, during the term of
this agreement process for RHC at the Combined Facility up to 25,000 Barrels per Day (the “Base
Volume”) of West Texas Intermediate crude oil. If during any three-month period the total quantity
of crude oil inputs to the Combined Facility exceeds 90,000 barrels per day, the quantity of West
Texas Intermediate crude oil to be processed by Chevron for RHC for the subsequent month shall be
increased (over the Base Volume) by an amount equal to 30% of the average amount (on a per-day
basis) by which total crude oil inputs to the Combined Facility during the prior three-month period
exceeded 90,000 barrels per day. RHC shall have no right to have additional quantities of crude
oil (over 25,000 barrels per day) processed by Chevron

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hereunder to the extent that crude oil inputs to the Combined Facility in excess of 90,000
barrels per day are properly attributable to new process units, or discretionary capital
improvements to existing processing units, installed by Chevron at Chevron’s sole expense; provided
that this limitation shall not apply if RHC, by written notice to Chevron, agrees that the per
barrel processing fee otherwise provided for in Section 3(c) shall be increased by an amount equal
to:

     (The initial cost of such discretionary capital improvements) times 12% times 30%
times (1/25,000) times (1/365),

to reflect Chevron’s investment in such discretionary capital improvements.

          (e) Chevron shall keep strict accounting records of all crude oil delivered to the Combined
Facility by RHC, of all crude oil processed by Chevron for RHC, of all products produced for RHC,
and of all products lifted from the Combined Facility by RHC. Notwithstanding Section 3(b), RHC
shall have no right (following the Transition Period referred to in Section 5) to lift any products
from the Combined Facility unless RHC has established at the Combined Facility a minimum crude oil
balance on Chevron’s books of at least 325,000 barrels. If at the end of any day, RHC’s crude oil
balance would otherwise fall below 325,000 barrels, the quantity of crude oil deemed run for RHC
during that day shall be reduced in order to maintain a minimum crude oil balance in favor of RHC
of 325,000 barrels. Following termination of this agreement, RHC shall be entitled to receive from
Chevron a yield of products (upon payment of the then-current processing fee) based on the crude
oil balance in favor of RHC on the date of termination.

          (f) Subject to Sections 7 and 11, Chevron’s obligation to deliver products to RHC as specified
in this Section 3 shall remain in effect regardless whether Chevron is utilizing

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the Designated Facilities for the processing of crude oil, and any election by Chevron not to
utilize the Designated Facilities shall not affect in any way the obligations of Chevron hereunder.

     4. Crude Oil and Product Nominations and Deliveries.

          (a) RHC shall have no obligation to nominate crude oil hereunder and may at its option
nominate for any calendar month any quantity of crude oil between 0 and 25,000 Barrels per Day.
(Quantities in excess of 25,000 barrels per day may be nominated only to the extent authorized by
Section 3(d).) RHC shall deliver crude oil to the Combined Facility by pipeline ratably over the
month.

          (b) At least ten days prior to the beginning of any calendar month during the term of this
agreement, RHC shall advise Chevron in writing of (i) RHC’s crude oil nominations, (ii) the
schedule for its crude oil deliveries during the applicable month, and (iii) the schedule for its
pipeline product deliveries for the applicable month. At the same time, RHC shall provide Chevron
with RHC’s tentative nominations, crude oil delivery schedule, and pipeline product delivery
schedule for the following month. RHC and Chevron shall cooperate in scheduling such deliveries.

          (c) RHC shall lift products from the Combined Facility reasonably evenly over the month. If
at any time RHC’s failure to lift such products creates operating difficulties at the Combined
Facility, Chevron may (after consultation with RHC in an effort to resolve the problem) suspend
RHC’s right to process crude oil at the Combined Facility until the problem is corrected. Products
shall be delivered by Chevron to RHC into pipelines at the Combined Facility as directed by RHC;
provided that RHC shall be entitled to lift products from the truck loading rack at the Combined
Facility pursuant to such terms and conditions as may be negotiated between the parties.

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     5. Transition Period.

          Notwithstanding Section 3, the maximum crude oil quantities that RHC may have processed by
Chevron hereunder during the period between the Commencement Date and November 30, 1993 (while the
Combined Facility is being connected to and integrated with the Chevron Refinery) (the “Transition
Period”) shall be as follows:

	 	 	 	 	 
	Month	 	Barrels per Day
	May
	 	 	0	 
	June
	 	 	5,000	 
	July
	 	 	5,000	 
	August
	 	 	10,000	 
	September
	 	 	10,000	 
	October
	 	 	15,000	 
	November
	 	 	20,000	 

The minimum crude oil balance required of RHC pursuant to Section 3(e) shall be phased in as
appropriate to accommodate such Transition Period.

     6. Mandatory Expenditures.

          (a) As used in this agreement, “Mandatory Expenditures” means:

     (1) Expenditures required because changes in applicable laws and regulations
mandate a change in permissible product specifications and capital investment is
necessary to allow the Combined Facility to continue to produce at least 90,000
barrels per day of marketable products;

     (2) Expenditures required because changes in applicable laws and regulations
require that capital investments be made at the Combined Facility in order to allow
the Combined Facility to continue to meet environmental or other compliance
standards; or

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     (3) Environmental cleanup or remediation expenses incurred by Chevron in
connection with the Combined Facility other than those referred to in Sections 9(d)
and 9(e) hereof.

          (b) If in any calendar year during the term hereof Mandatory Expenditures are required at the
Combined Facility in excess of $10 million, Chevron shall so notify RHC in writing and RHC and
Chevron shall meet and confer regarding appropriate modifications to this agreement to address such
Mandatory Expenditures. If the parties are unable to agree to such modifications within 30 days
following the time such notice is given to RHC by Chevron, then this agreement shall continue in
effect and Chevron shall cause such Mandatory Expenditures to be made; provided that the per barrel
processing fee otherwise provided for in Section 3(c) shall be increased by an amount equal to:

     (The initial cost of such Mandatory Expenditures in excess of $10 million) times 12%
times (1/90,000) times (1/365),

to reflect the value of such Mandatory Expenditures by Chevron. An example of such calculation is
set forth in Exhibit F. Such processing fee shall be subject to being increased only for Mandatory
Expenditures incurred by Chevron in years subsequent to 1993. Any such increased fee shall apply
beginning with the first calendar month during the year after the month during which the $10
million threshold is exceeded, and shall be further increased thereafter to reflect additional
Mandatory Expenditures by Chevron during such year.

     7. Casualty and Insurance.

          (a) Neither Chevron nor RHC shall have any obligation to insure the Designated Facilities, but
either may do so at its option. In the event of any casualty to the Designated Facilities, Chevron
shall have no obligation to repair or replace the Designated

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Facilities unless such casualty was the result of gross negligence or willful misconduct by
Chevron or its employees or agents. In the event of any casualty to the Designated Facilities, RHC
shall have no obligation to repair or replace the Designated Facilities, but shall have the right
to do so should it so elect.

          (b) In the event of any material casualty to the Designated Facilities or the Chevron
Refinery, the obligations of the parties under Sections 3 and 4 (and, if applicable, Section 5)
hereof shall be suspended for such period of time as would be required for Chevron with due
diligence to repair the effect of the casualty. If the Combined Facility is able to operate at a
reduced level despite such casualty, RHC’s entitlement to process crude oil and to receive
petroleum products pursuant to Section 3 shall be adjusted in a fair and equitable manner to
properly allocate the effect of the casualty between the parties.

          (c) Notwithstanding Section 7(b), Chevron shall have no obligation to repair or replace any
casualty to the Designated Facilities or to the Chevron Refinery; provided that following that time
period which would be reasonably required with due diligence to repair the effect of such casualty,
Chevron’s obligations to provide products to RHC as provided in Section 3 shall resume.

          (d) If any casualty renders any of the Designated Facilities inoperable and Chevron elects to
reconstruct any such facility, such facility shall be rebuilt on the EPR Refinery and shall
thereafter be deemed to be part of the Designated Facilities.

     8. Property Taxes.

          RHC shall pay any and all property taxes on the EPR Refinery, the Designated Facilities, and
all facilities located at the EPR Refinery, except any facilities which may be installed on the EPR
Refinery which are owned by Chevron. Chevron shall pay all property

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taxes related to the Chevron Refinery and to any equipment installed by Chevron and owned by
Chevron at the EPR Refinery.

     9. Environmental Liabilities.

          (a) Except as otherwise provided herein, Chevron shall have no liability for any environmental
contamination which resulted from operations at the EPR Refinery prior to the Commencement Date
regardless whether such contamination is now or hereafter located on or off the EPR Refinery, and
RHC hereby agrees that Chevron has no responsibility therefor. Except as otherwise provided
herein, RHC shall have no liability for any environmental contamination which resulted from
operations at the Chevron Refinery regardless whether such contamination is now or hereafter
located on or off the Chevron Refinery, and Chevron hereby agrees that RHC has no responsibility
therefor.

          (b) Chevron is currently engaged in making an environmental assessment of the EPR Refinery.
If prior to the end of the Transition Period specified in Section 5, Chevron discovers any
information regarding the environmental condition of the EPR Refinery which in Chevron’s reasonable
judgment would materially impair the benefit of this agreement to Chevron, Chevron shall have the
right to terminate this agreement upon giving written notice to RHC of such termination prior to
the end of the Transition Period.

          (c) Chevron and RHC acknowledge the existence of certain governmental remedial and cleanup
requirements with regard to the EPR Refinery. Chevron agrees to operate the Combined Facility
subsequent to the Commencement Date in a prudent manner so as to comply with any such existing
remedial or cleanup requirements or any such remedial or cleanup requirement that may be imposed in
the future to the extent such requirements are applicable to the Designated Facilities.

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          (d) Chevron shall assume initial responsibility for compliance with any governmental
requirements with regard to all solid waste management units subject to corrective action under the
Resource Conservation Recovery Act (“RCRA”) or the Texas Water Code or hazardous waste management
activities subject to regulation under RCRA or the Texas Water Code, associated with operations at
the EPR Refinery prior to the Commencement Date (whether currently identified or identified in the
future), including but not limited to those sites identified in Exhibit H (“RCRA Sites”). Chevron
shall invoice RHC each month for Chevron’s reasonable costs and expenses incurred in complying with
any such remedial or cleanup requirements with regard to such RCRA Sites. RHC shall pay such
invoice prior to the end of the month following the month in which such costs and expenses were
incurred by Chevron. RHC shall have the right at any time to assume direct responsibility for
compliance with any such remedial or cleanup requirements.

          (e) RHC shall reimburse Chevron for a percentage (specified below) of all costs and expenses
incurred by Chevron in connection with cleanup or remediation of contamination located off of the
EPR Refinery or the Chevron Refinery. Such percentage shall be equal to the percentage of such
cleanup and remediation costs and expenses reasonably attributable to the cleanup or remediation of
environmental contamination originating from operations at the EPR Refinery prior to the
Commencement Date. Chevron shall invoice RHC each month for RHC’s percentage of such costs and
expenses. RHC shall pay such invoice prior to the end of the month following the month in which
such costs and expenses were incurred by Chevron. The parties hereto shall cooperate in seeking to
recover such costs and expenses from potentially responsible third parties.

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     10. Indemnity.

          Chevron shall save, and shall protect, indemnify and save harmless RHC, and its officers,
directors, incorporators, shareholders, partners, employees, agents and servants from and against
all liabilities, losses, obligations, claims, damages, penalties, fines, causes of action, suits,
costs and expenses (including, without limitation, attorneys’ fees and expenses and such fees and
expenses incurred in enforcing this indemnity) or judgments of any nature (collectively the
“Indemnified Risks”) to the extent they arise from or relate to Chevron’s use, maintenance and
operation of the Combined Facility during the term of this agreement. If any claim, action, suit
or proceeding arising from any of the foregoing is brought against RHC or any other person
indemnified or intended to be indemnified pursuant to this Section 10, Chevron shall, at Chevron’s
expense, resist and defend such action, suit or proceeding or cause the same to be resisted and
defended by counsel designated by Chevron and acceptable to the person or persons indemnified or
intended to be indemnified under this Section 10, but such party shall be entitled to participate
jointly in such defense, in which case such party shall be responsible for its own legal fees or
other expenses, if any, related to such defense incurred subsequent to the joint participation by
such party in such defense other than the reasonable costs of investigation. The obligations of
Chevron under this Section 10 shall survive the termination of this agreement.

     11. Force Majeure.

          Either party shall be excused from the performance of its obligations under this agreement in
the event and to the extent that such performance is delayed or prevented by any cause beyond its
reasonable control, including without limitation acts of God, floods, fire, explosion, war
(declared or undeclared), insurrection, strikes or other differences with employees (regardless
whether such labor disturbance could be settled by acceding to the demands of a

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labor group), major process unit failure, or acts or orders of governmental authorities;
provided in the event of any such contingency such party shall take all reasonable action to
mitigate the effect or duration of such contingency. If the Combined Facility is able to operate
at a reduced level despite such contingency, RHC’s entitlement to process or nominate crude oil and
to receive petroleum products pursuant to Section 3 shall be adjusted in a fair and equitable
manner to properly allocate the effect of the contingency between the parties.

     12. Condition and Use of Designated Facilities; Quiet Enjoyment.

          (a) RHC hereby warrants to Chevron that Chevron shall have the exclusive and uninterrupted
right during the term hereof to utilize the Designated Facilities.

          (b) The Designated Facilities are made available in the present condition thereof, without
representations and warranties of any kind as to their condition by RHC or any person acting on
behalf of RHC. CHEVRON ACKNOWLEDGES AND AGREES THAT THE DESIGNATED FACILITIES HAVE NOT BEEN
DESIGNED, CONSTRUCTED, MANUFACTURED OR MAINTAINED BY RHC, THAT RHC HAS NOT SUPPLIED ANY
SPECIFICATIONS WITH RESPECT TO THE DESIGN, CONSTRUCTION, MANUFACTURE OR MAINTENANCE OF ANY
DESIGNATED FACILITIES AND THAT RHC (i) IS NOT A MANUFACTURER OF, OR VENDOR OF, OR MERCHANT WITH
RESPECT TO, ANY OF THE DESIGNATED FACILITIES, (ii) HAS NOT MADE ANY RECOMMENDATION, GIVEN ANY
ADVICE OR TAKEN ANY OTHER ACTION WITH RESPECT TO THE CHOICE OF ANY MANUFACTURER, SUPPLIER OR
TRANSPORTER OF, OR ANY VENDOR OF OR OTHER CONTRACTOR WITH RESPECT TO, THE DESIGNATED FACILITIES,
(iii) HAS NEVER HAD PHYSICAL POSSESSION OF SUCH DESIGNATED FACILITIES OR MADE ANY INSPECTION
THEREOF, AND (iv) HAS NOT

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MADE AND IS NOT MAKING ANY WARRANTY, EXPRESS OR IMPLIED, RELATING TO THE DESIGNATED
FACILITIES, WITH RESPECT TO MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE, WHETHER
ARISING PURSUANT TO THE UNIFORM COMMERCIAL CODE OR ANY OTHER PRESENT OR FUTURE LAW OR OTHERWISE.
CHEVRON EXPRESSLY WAIVES THE PROVISIONS OF CHAPTER 17, SUBCHAPTER E, SECTION 17.41 THROUGH 17.63,
INCLUSIVE (OTHER THAN SECTION 17.555, WHICH IS NOT WAIVED), VERNON’S TEXAS CODE ANNOTATED BUSINESS
& COMMERCIAL CODE.

          (c) During the term of this agreement, RHC hereby assigns to Chevron the benefits in respect
of any manufacturer’s or vendor’s warranties or undertakings, express or implied, relating to any
item of Designated Facilities (including any equipment or parts supplied therewith), and to the
extent assignment of the same is prohibited or precludes enforcement of any such warranty or
undertaking, RHC hereby subrogates Chevron to its rights in respect thereof. RHC hereby authorizes
Chevron, at Chevron’s expense, to assert any and all claims, and to prosecute any and all suits,
actions and proceedings, in its own name or in the name of RHC, in respect of any such warranty or
undertaking and to retain the proceeds received. Notwithstanding anything else in this Section
12(c), RHC shall have the rights conferred on Chevron in this Section 12(c) if RHC incurs any
unindemnified damage or liability relating to or in connection with any manufacturer’s or vendor’s
warranty or undertaking.

     13. Representations and Warranties.

          (a) Chevron represents and warrants as follows:

     1. Chevron is a corporation duly organized, validly existing and in good
standing under the laws of the State of Pennsylvania. Chevron has all

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requisite corporate power and corporate authority to own its properties and
assets and to carry on its business as now conducted and as presently proposed to be
conducted. Chevron is duly qualified and in good standing in the State of Texas,
and is duly qualified and in good standing in each other United States jurisdiction
in which the failure so to qualify would have a material adverse effect on Chevron.

     2. Chevron has all necessary corporate power and corporate authority to execute
and deliver this agreement and to carry out the provisions hereof. All corporate
action on the part of Chevron which is required for the valid and binding execution
and delivery of, and compliance with, this agreement by Chevron has been duly and
effectively taken. This agreement constitutes a legal, valid and binding obligation
of Chevron, enforceable in accordance with its terms, except as the same may be
limited by bankruptcy, insolvency, reorganization or other laws relating to or
affecting the enforcement of creditors’ rights generally and by general principles
of equity.

     3. Neither Chevron nor any of its properties or assets is subject to any
contract or agreement, any provision of its Certificate of Incorporation or its By
Laws, or other corporate restriction, any order, ruling, certificate, license,
judgment, injunction or demand of any country, state, territory or political
subdivision thereof or of any court, agency, board, commission, governmental
instrumentality or other tribunal which materially adversely affects the ability of
Chevron to perform its obligations under this agreement.

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     4. To the best knowledge of Chevron, there presently exists no need to incur
mandatory Expenditures, except as specified in Exhibit H.

          (b) RHC represents and warrants as follows:

     1. RHC is a limited partnership duly organized, validly existing and in good
standing under the laws of the State of Delaware. RHC has all requisite partnership
power and partnership authority to own its properties and assets and to carry on its
business as now conducted and as presently proposed to be conducted. RHC is duly
qualified and in good standing in the State of Texas, and is duly qualified and in
good standing in each other United States jurisdiction in which the failure so to
qualify would have a material adverse effect on RHC.

     2. RHC has all necessary partnership power and partnership authority to execute
and deliver this agreement and to carry out the provisions hereof. All partnership
action on the part of RHC which is required for the valid and binding execution and
delivery of, and compliance with, this agreement by RHC has been duly and
effectively taken. This agreement constitutes a legal, valid and binding obligation
of RHC, enforceable in accordance with its terms, except as the same may be limited
by bankruptcy, insolvency, reorganization or other laws relating to or affecting the
enforcement of creditors’ rights generally and by general principles of equity.

     3. Neither RHC nor any of its properties or assets is subject to any contract
or agreement, any provision of its Agreement or Certificate of Limited Partnership
or its By-Laws, or other corporate restriction, any order, ruling, certificate,
license, judgment, injunction or demand of any country, state, territory

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or political subdivision thereof or of any court, agency, board, commission,
governmental instrumentality or other tribunal which materially adversely affects
the ability of RHC to perform its obligations under this agreement.

     14. Inspection; Right to Enter Premises; Information.

          (a) RHC or its authorized representatives may, (i) enter the premises of the EPR Refinery at
reasonable times upon reasonable advance notice in order to inspect the Designated Facilities
(subject to the availability thereof for inspection) and to inspect, audit and make copies of all
documents and instruments in the possession of Chevron that are reasonably necessary or appropriate
for RHC or such authorized representatives to determine the truth and accuracy of any statement,
schedule, annex, exhibit or representation delivered or made hereunder or compliance by Chevron
with any of the agreements herein contained and (ii) discuss the condition and performance of the
Designated Facilities with the responsible officers of Chevron, and Chevron agrees to take such
reasonable and customary steps as are appropriate to facilitate such inspections and discussions.
RHC shall not incur any liability or obligation for not making any such inspection or for not
conducting any discussion.

          (b) RHC or its authorized representatives may enter the premises of Chevron at reasonable
times upon reasonable advance notice in order to inspect, audit and make copies of (i) the records
referred to in Section 3(e) hereof and (ii) all documents and instruments in the possession of
Chevron that are reasonably necessary or appropriate for RHC or such authorized representatives to
determine the truth and accuracy of any statement, schedule, annex or exhibit delivered or made
hereunder, or to determine compliance with any provisions of this agreement.

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          (c) Chevron shall upon request by RHC provide RHC with copies of any documents referred to in
Section 14(b) provided that the cost of such copies shall be borne by RHC.

          (d) Any data obtained by RHC pursuant hereto which is designated by Chevron as proprietary or
confidential shall be held in confidence by RHC.

     15. Liens.

          (a) Chevron shall not directly or indirectly create or permit to be created or to remain, and
shall discharge, any mortgage, attachment, lien (including any tax lien other than such arising
from the failure of RHC to discharge property taxes for which RHC is responsible pursuant to
Section 8), charge, security interest or other encumbrance of any nature whatsoever on, in or with
respect to the Designated Facilities or any part thereof (“Liens”) other than (i) Liens created
directly or indirectly or acquiesced in by RHC, (ii) any Lien being contested as permitted by
Section 15(b), (iii) Liens of mechanics, laborers, garagemen, garage-keepers, materialmen,
suppliers, vendors, workmen, carriers and any other statutory or common law possessory Liens
created in the ordinary course of business for sums of money (other than borrowed money) which
under the terms of the related contracts are not at the time due and (iv) Liens which are of record
on the Commencement Date.

          (b) After prior notice to RHC, Chevron may at its expense contest, by appropriate proceedings
conducted in good faith and with due diligence, any Lien which Chevron is obligated to discharge or
pay to any person other than RHC. Chevron shall pay, and save RHC harmless against, all losses,
judgments, decrees and reasonable costs, including attorneys’ fees and expenses and such fees and
expenses incurred in enforcing this indemnity, in connection with any such contest and shall,
promptly after the final determination of such

-19-

 

contest, pay and discharge the amounts which shall be imposed or determined to be payable
therein; together with all penalties, reasonable costs and expenses incurred in connection
therewith.

     16. Events of Default and Remedies.

          (a) Each of the following acts or occurrences shall constitute an “Event of Default”
hereunder:

     1. default by a party in the performance of any covenant, liability or
obligation of such party to the other and the continuance of such default for 30
days after notice to such party of such default from the other; or

     2. any representation or warranty made by a party herein or otherwise in
writing in connection with or pursuant to this agreement shall be false or
misleading in any material adverse respect on the date as of which made or
reaffirmed; or

     3. a party shall (1) voluntarily commence any proceeding or file any petition
seeking relief under Title 11 of the United States Code or any other Federal or
state bankruptcy, insolvency or similar law, (2) consent to the institution of any
such proceeding or the filing of any such petition, (3) apply for or consent to the
appointment of a receiver, trustee, custodian, sequestrator or similar official for
a party or for a substantial part of its property, (4) file an answer admitting the
material allegations of a petition filed against it in any such proceeding, (5) make
a general assignment for the benefit of creditors, (6) admit in writing its
inability or fail generally to pay its debts as they become due or (7) take
corporate action for the purpose of effecting any of the foregoing; or

-20-

 

     4. an involuntary proceeding shall be commenced or an involuntary petition
shall be filed in a court of competent jurisdiction seeking (1) relief in respect of
a party, or of a substantial part of its property, under Title ii of the United
States Code or any other Federal or state bankruptcy, insolvency or similar law, (2)
the appointment of a receiver, trustee, custodian, sequestrator or similar official
for a party or for a substantial part of its property or (3) the winding-up or
liquidation of a party; and such proceeding or petition shall continue undismissed
for 60 days and the other party determines in its sole discretion that such
proceeding or petition is not frivolous and notifies such party of such
determination (it being understood that the notifying party need not make any
investigation), or an order or decree approving or ordering any of the foregoing
shall continue unstayed and in effect for 60 days.

          (b) Upon the occurrence and during the continuance of any Event of Default, the non-defaulting
party may in its discretion do any one or more of the following:

     1. proceed by appropriate judicial proceedings, either at law or in equity or
in bankruptcy, to enforce performance or observance by the defaulting party of the
applicable provisions of this agreement, or to recover damages for the breach of any
thereof; or

     2. by notice to the defaulting party terminate this agreement; provided that
RHC shall have no right to terminate this agreement except based on a breach by
Chevron of Chevron’s obligation under Section 3(b) to deliver petroleum products to
RHC and Chevron shall have no right to terminate this agreement except based on a
breach by RHC of its obligation to pay processing

-21-

 

fees under Section 3(c). No such termination shall relieve the defaulting
party of its obligations to the other party accruing prior to termination.

          (c) The remedies herein provided in case of an Event of Default shall not be deemed to be
exclusive, but shall be cumulative and shall be in addition to all other remedies existing at law,
inequity or in bankruptcy.

          (d) Notwithstanding Section 11, if the Combined Facility is shut down for a period of six
months by reason of any governmental order or an injunction issued on behalf of a governmental
entity, RHC shall have the right to terminate this agreement by written notice to Chevron.

     17. Notices.

          All notices to be given under this agreement shall be in writing and shall be deemed to have
been duly given if delivered personally, delivered by a recognized overnight commercial carrier, or
telecopied with receipt acknowledged, to the party at the address set forth below or such other
address as such party shall have designated by 10 days’ prior written notice to the other:

If to Chevron:

Chevron U.S.A. Products Company

6501 Trowbridge Drive

El Paso, Texas 79905

Attention: Refinery Manager

If to RHC:

Refinery Holding Company, L.P.

Attention: Timothy J. Bennett, Manager

c/o Capital Equipment Financing, Inc.

1211 Avenue of the Americas

New York, New York 10036

-22-

 

     18. Entire Agreement.

          This agreement and the exhibits hereto constitute the entire agreement between RHC and Chevron
with respect to the subject matter hereof, and supersede all prior oral or written agreements,
commitments or understandings with respect thereto. No amendment to this agreement shall be
binding on the parties unless in writing and signed by authorized representatives of both parties.
The headings in this agreement are for convenience of reference only and shall not be used to
construe or interpret the meaning of any provision.

     19. Assignment.

          Either party hereto shall have the right to assign its rights or delegate its duties hereunder
if it first obtains the written consent of the other party, which consent shall not unreasonably be
withheld.

     20. Governing Law.

          This agreement shall be governed by the laws of the State of Texas, without regard to rules
concerning choice of law.

     21. Dispute Resolution.

          In the event of any dispute between the parties hereto, each party shall promptly appoint a
negotiator, other than legal counsel (unless the parties agree otherwise), knowledgeable about the
subject matter under dispute to represent them in settlement negotiations. The negotiator for each
party should be a person that has (or can expeditiously obtain) settlement authority for resolving
disputes of the nature in question. If the negotiators are unable to resolve such dispute, they
may, if they so elect, select a mutually satisfactory third party mediator having expertise in the
area under dispute to help expedite a resolution of the matter. The cost of any such mediator
shall be borne equally by the parties. If the parties are unable to resolve the

-23-

 

dispute within 60 days following the appointment of the negotiators (or such longer period as
may be mutually agreed upon), the matter shall be referred for arbitration pursuant to Section 22.

     22. Arbitration.

          Any dispute, controversy or claim arising out of or relating to his agreement, or the breach,
termination or validity thereof, shall be submitted for arbitration at E1 Paso, Texas, in
accordance with the Commercial Arbitration Rules of the American Arbitration Association by three
arbitrators appointed in accordance with such rules; provided that, unless otherwise agreed to in
writing by the parties, the award rendered by the arbitrators shall not be binding on the parties.
Any party dissatisfied with such award shall retain all rights to have such matter adjudicated de
novo by a court.

     23. Conflict of Interest.

          No director, employee or agent of either party has given or received or shall give or receive
any commission, fee, rebate, gift of entertainment of significant value, or has entered or shall
enter into any business arrangement (without that party’s prior written consent) with any director,
employee or agent of the other party. Either party shall have the right to have the books of the
other audited by a third party for the purpose of assuring compliance with this Section 23.

          IN WITNESS WHEREOF, the parties hereto have executed this agreement as of the date first set
forth above.

	 	 	 	 	 	 	 
	 	 	REFINERY HOLDING COMPANY, L.P.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	REFINERY COMPANY, L.C.,	 	 
	 

	 	 	 	general partner	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Timothy J. Bennett	 	 
	 

	 	 	 	 

Timothy J. Bennett

Manager
	 	 

-24-

 

	 	 	 	 	 	 	 
	 	 	CHEVRON U.S.A. INC.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ D. R. Hoyer	 	 
	 

	 	 	 	 

D. R. Hoyer

Executive Vice President
	 	 

-25-exv10w11

 

Exhibit 10.11

Execution Copy

EL PASO REFINERY AND CRUDE PIPELINE SYSTEM

PURCHASE AND SALE AGREEMENT

among

CHEVRON U.S.A. INC. and

CHEVRON PIPE LINE COMPANY

(“Sellers”),

WESTERN REFINING COMPANY, L.P.

(“Refinery Buyer”),

and

KASTON PIPELINE COMPANY, L.P.

(“Pipeline Buyer”)

May 29, 2003

 

 

TABLE OF CONTENTS

	 	 	 	 	 	 	 
	 	 	 	 	Page	 
	ARTICLE 1 DEFINITIONS	 	 	2	 
	 
	 	 	 	 	 	 
	1.1
	 	Defined Terms	 	 	2	 
	1.2
	 	Rules of Construction	 	 	11	 
	 
	 	 	 	 	 	 
	ARTICLE 2 PURCHASE AND SALE OF TRANSFERRED PROPERTIES	 	 	12	 
	 
	 	 	 	 	 	 
	2.1
	 	CUSA Properties	 	 	12	 
	2.2
	 	CPL Properties	 	 	13	 
	2.3
	 	Inventories	 	 	14	 
	2.4
	 	Excluded Items	 	 	14	 
	2.5
	 	Conveyancing Instruments	 	 	16	 
	 
	 	 	 	 	 	 
	ARTICLE 3 INDEMNIFICATION OF LIABILITIES	 	 	16	 
	 
	 	 	 	 	 	 
	3.1
	 	Losses Indemnified by Sellers	 	 	16	 
	3.2
	 	Losses Indemnified by Buyers	 	 	22	 
	3.3
	 	General Liability Provisions	 	 	25	 
	3.4
	 	Indemnification and Defense Procedures	 	 	26	 
	3.5
	 	No Liability if Loss is Otherwise Compensated For	 	 	28	 
	 
	 	 	 	 	 	 
	ARTICLE 4 DEPOSIT AND PURCHASE PRICE	 	 	29	 
	 
	 	 	 	 	 	 
	4.1
	 	Deposit	 	 	29	 
	4.2
	 	Purchase Price	 	 	29	 
	4.3
	 	Purchase Price Adjustments	 	 	29	 
	4.4
	 	Settlement Statement	 	 	30	 
	4.5
	 	Allocation of f Purchase Price	 	 	31	 
	 
	 	 	 	 	 	 
	ARTICLE 5 CLOSING	 	 	31	 
	 
	 	 	 	 	 	 
	5.1
	 	Time and Place of Closing	 	 	31	 
	5.2
	 	Scheduled Closing Date	 	 	31	 
	5.3
	 	Termination	 	 	31	 
	5.4
	 	Consequences of Termination	 	 	31	 
	 
	 	 	 	 	 	 
	ARTICLE 6 CLOSING CONDITIONS PRECEDENT	 	 	32	 
	 
	 	 	 	 	 	 
	6.1
	 	Sellers’ Closing Conditions Precedent	 	 	32	 
	6.2
	 	Buyers’ Closing Conditions Precedent	 	 	34	 
	 
	 	 	 	 	 	 
	ARTICLE 7 REPRESENTATIONS AND WARRANTIES	 	 	37	 
	 
	 	 	 	 	 	 
	7.1
	 	CUSA’s Representations and Warranties	 	 	37	 
	7.2
	 	CPL’s Representations and Warranties	 	 	41	 
	7.3
	 	Buyers’ Representations and Warranties	 	 	44	 
	7.4
	 	Survival	 	 	45	 
	7.5
	 	Exclusivity of Warranties and Specific Disclaimers	 	 	45	 

i

 

	 	 	 	 	 	 	 
	 	 	 	 	Page	 
	ARTICLE 8 PRE-CLOSING COVENANTS	 	 	46	 
	 
	 	 	 	 	 	 
	8.1
	 	Buyers’ Inspections	 	 	46	 
	8.2
	 	Operation of Transferred Properties Prior to Closing	 	 	48	 
	8.3
	 	Announcements	 	 	48	 
	8.4
	 	Requirements for Transfer of Transferred Properties	 	 	49	 
	8.5
	 	Other Government Authority Reviews and Approvals	 	 	50	 
	8.6
	 	Replacement or Provision of Security	 	 	51	 
	8.7
	 	CPL Real Property Title Matters	 	 	51	 
	8.8
	 	Transfer of South Refinery Permits	 	 	52	 
	8.9
	 	Application for Texas Direct Pay Permit	 	 	52	 
	 
	 	 	 	 	 	 
	ARTICLE 9 POST-CLOSING COVENANTS	 	 	52	 
	 
	 	 	 	 	 	 
	9.1
	 	Termination of Rights to Sellers’ Insurance	 	 	52	 
	9.2
	 	Removal of Proprietary Information	 	 	53	 
	9.3
	 	Replacement of Sellers’ Identification	 	 	53	 
	9.4
	 	CUSA’s Performance of Free Product Recovery Activities	 	 	53	 
	9.5
	 	Remediation and Conveyance of CUSA-Retained Option Property	 	 	53	 
	9.6
	 	Buyers’ Corrective Action Cooperation Covenants	 	 	55	 
	9.7
	 	Transition Services Agreement	 	 	58	 
	9.8
	 	Right of First Refusal and Option Agreements	 	 	58	 
	9.9
	 	Product Sales Agreement	 	 	58	 
	9.10
	 	Residuum Supply Agreement	 	 	58	 
	9.11
	 	Operational Services Agreement	 	 	59	 
	9.12
	 	Termination of Operating Agreement	 	 	59	 
	9.13
	 	Product Pipeline Shipping History Notifications	 	 	59	 
	9.14
	 	Connection Agreements with Products Pipelines	 	 	59	 
	9.15
	 	Loaned Employee Agreement	 	 	59	 
	9.16
	 	Remediation Hydrocarbon Sales Agreement	 	 	59	 
	9.17
	 	Technology Agreement	 	 	59	 
	9.18
	 	Rotor Use Agreement	 	 	59	 
	9.19
	 	Pipeline Repair Covenants	 	 	59	 
	9.20
	 	Pipeline Remediation Covenants	 	 	60	 
	9.21
	 	Cooperation in Filing Environmental Compliance Reports	 	 	60	 
	9.22
	 	Cooperation in Obtaining Security	 	 	60	 
	9.23
	 	Cooperation in Filing Clean Fuel Compliance Report	 	 	61	 
	9.24
	 	Mechanisms for Implementing Sellers’ Environmental Obligations	 	 	61	 
	9.25
	 	South Refinery PLL Insurance Policy	 	 	61	 
	9.26
	 	Success Sharing Agreement	 	 	61	 
	9.27
	 	Guaranty and Undertaking Letters	 	 	61	 
	9.28
	 	Aceituno Litigation	 	 	61	 
	 
	 	 	 	 	 	 
	ARTICLE 10 TAXES	 	 	61	 
	 
	 	 	 	 	 	 
	10.1
	 	Transfer Taxes	 	 	61	 
	10.2
	 	Property and Excise Taxes	 	 	62	 
	10.3
	 	Tax-Deferred Exchange Option	 	 	63	 
	10.4
	 	Refunds	 	 	63	 

ii

 

	 	 	 	 	 	 	 
	 	 	 	 	Page	 
	10.5
	 	Compliance and Contests	 	 	63	 
	 
	 	 	 	 	 	 
	ARTICLE 11 EMPLOYEES AND BENEFITS	 	 	64	 
	 
	 	 	 	 	 	 
	11.1
	 	Offers of Employment	 	 	64	 
	11.2
	 	Defined Benefit Pension Plans	 	 	66	 
	11.3
	 	Qualified Defined Contribution Plans	 	 	67	 
	11.4
	 	Severance Plans	 	 	68	 
	11.5
	 	Vacation Pay	 	 	69	 
	11.6
	 	Health Care Plans	 	 	69	 
	11.7
	 	Post Retirement Welfare Benefits	 	 	70	 
	11.8
	 	WARN Act Indemnification	 	 	71	 
	11.9
	 	Buyers’ Other Employee Benefits	 	 	71	 
	11.10
	 	General Employee Provisions	 	 	71	 
	 
	 	 	 	 	 	 
	ARTICLE 12 GENERAL TERMS	 	 	72	 
	 
	 	 	 	 	 	 
	12.1
	 	Costs and Expenses	 	 	72	 
	12.2
	 	Bulk Transfer Law	 	 	72	 
	12.3
	 	Further Assurances	 	 	72	 
	12.4
	 	Notices	 	 	73	 
	12.5
	 	Assignment	 	 	73	 
	12.6
	 	Governing Law and Dispute Resolution	 	 	73	 
	12.7
	 	Entire Agreement and Modifications	 	 	75	 
	12.8
	 	Parties in Interest	 	 	76	 
	12.9
	 	Severability	 	 	76	 
	12.10
	 	Records and Assistance	 	 	76	 
	12.11
	 	Counterparts; Facsimile	 	 	77	 

iii

 

SCHEDULES

	 	 	 
	Schedule 1

	 	CUSA Real Property
	Schedule 2

	 	CUSA Fixed Assets
	Schedule 3

	 	Depiction of Bright Line
	Schedule 4

	 	CUSA Applicable Contracts
	Schedule 5

	 	CUSA Applicable Permits
	Schedule 6

	 	CPL Real Property
	Schedule 7

	 	CPL Fixed Assets
	Schedule 8

	 	CPL Applicable Contracts
	Schedule 9

	 	CPL Applicable Permits
	Schedule 10

	 	South Refinery Remediation Equipment
	Schedule 11

	 	Measurement and Valuation of Inventories
	Schedule 12

	 	Aceituno Litigation
	Schedule 13

	 	Specifically Excluded Items
	Schedule 14

	 	Subsurface Plume Footprint
	Schedule 15

	 	Map of CUSA Properties and Retained Properties
	Schedule 16

	 	Prospective Employees
	Schedule 17

	 	Sellers’ Knowledge
	Schedule 18

	 	Sellers’ Security
	Schedule 19

	 	Heavy Straight Run Gasoline Chromatogram
	Schedule 20

	 	Allocation of Purchase Price
	Schedule 21

	 	Loans to Affected Employees

EXHIBITS

	 	 	 
	Exhibit A

	 	Special Warranty Deed for Fee Property
	Exhibit B-1

	 	CUSA Deed for Easements
	Exhibit B-2

	 	CPL Deed for Easements
	Exhibit C-1

	 	CUSA Assignment and Assumption Agreement for Leases and Contracts
	Exhibit C-2

	 	CPL Assignment and Assumption Agreement for Leases and Contracts
	Exhibit D-1

	 	CUSA Bill of Sale for Personal Property
	Exhibit D-2

	 	CPL Bill of Sale for Personal Property
	Exhibit E-1

	 	Easement Agreement
	Exhibit E-2

	 	Pipeline Easement Agreements
	Exhibit F

	 	Opinion of Buyers’ Counsel
	Exhibit G

	 	Opinion of Sellers’ Counsel
	Exhibit H-1

	 	CUSA Affidavit of Non-Foreign Status
	Exhibit H-2

	 	CPL Affidavit of Non-Foreign Status
	Exhibit I

	 	Transition Services Agreement
	Exhibit J

	 	Right of First Refusal Agreement — Southwest Asphalt Business
	Exhibit K

	 	Right of First Refusal Agreement — Crude Pipelines
	Exhibit L

	 	Option Agreement — CUSA-Retained Option Property
	Exhibit M

	 	Product Sales Agreement
	Exhibit N

	 	Residuum Supply Agreement
	Exhibit O

	 	Operational Services Agreement

iv

 

	 	 	 
	Exhibit P

	 	Termination of Operating Agreement
	Exhibit Q

	 	Products Pipeline Shipping History Notifications
	Exhibit R-1

	 	Connection Agreement for Products Pipelines (Juarez)
	Exhibit R-2

	 	Connection Agreement for Products Pipelines (Albuquerque)
	Exhibit S

	 	Loaned Employee Agreement
	Exhibit T

	 	Remediation Hydrocarbon Sales Agreement
	Exhibit U

	 	Technology Agreement
	Exhibit V

	 	Rotor Use Agreement
	Exhibit W

	 	Guaranty Agreement
	Exhibit X-1

	 	Foster Undertaking Letter
	Exhibit X-2

	 	Refinery Trust Undertaking Letter
	Exhibit X-3

	 	Pipeline Trust Undertaking Letter
	Exhibit Y

	 	Success Sharing Agreement

v

 

PURCHASE AND SALE AGREEMENT

     THIS PURCHASE AND SALE AGREEMENT (this “Agreement”), entered into on May 29, 2003 (the
“Execution Date”) by and among CHEVRON U.S.A. INC. (“CUSA”), a Pennsylvania corporation, CHEVRON
PIPE LINE COMPANY, a Delaware corporation (“CPL”), WESTERN REFINING COMPANY, L.P., a Delaware
limited partnership (formerly named Refinery Holding Company, L.P.) (“Refinery Buyer”), and KASTON
PIPELINE COMPANY, L.P., a Delaware limited partnership (“Pipeline Buyer”; and Refinery Buyer and
Pipeline Buyer, collectively, the “Buyers” and each, a “Buyer”),

W I T N E S S E T H:

     WHEREAS CUSA is the owner of a crude oil refinery and light products marketing terminal
located in El Paso, Texas, and CPL is the owner of certain crude oil pipeline properties located in
Texas; and

     WHEREAS CUSA and CPL (collectively the “Sellers”) desire to sell to Buyers such assets as set
forth herein, including related processing facilities, storage facilities, real property interests,
equipment, inventories and other property and interests, all as more particularly defined below,
and Buyers desire to purchase such assets of Sellers on the terms and subject to the conditions set
forth in this Agreement; and

     WHEREAS CUSA currently provides operating services for, and maintains certain property
interests at, a crude oil refinery and related facilities owned by Refinery Buyer, located south of
the CUSA refinery at 6500 Trowbridge Drive, El Paso, Texas (the “South Refinery”), in accordance
with an Operating Agreement defined below; and

     WHEREAS RHC Holdings, L.P. and WRC Refining Company (formerly named Western Refining Company),
the general partner of RHC Holdings, L.P., have acquired all of the outstanding equity of Refinery
Buyer and Refinery Company, L.C., the general partner of Refinery Buyer, respectively, pursuant to
a Purchase Agreement dated August 29, 2000; and

     WHEREAS effective on the date of sale of Sellers’ assets described above, except to the extent
described herein and in the Termination of Operating Agreement, CUSA and Refinery Buyer desire to
terminate the Operating Agreement between CUSA and Refinery Buyer dated as of May 6, 1993, as
amended by the July 1998 Settlement Agreement (as amended, the “Operating Agreement”) in
consideration of various agreements herein;

     WHEREAS Refinery Buyer and Pipeline Buyer are Affiliates of each other (as the term
“Affiliate” is defined herein); and

     WHEREAS in December 2002, a Settlement Agreement (the “December 2002 Settlement Agreement”)
was entered into among Refinery Buyer, CUSA, Chevron Environmental Management Company, an Affiliate
of CUSA, and TRMI Holdings Inc. (“TRMI”), to settle claims asserted by Refinery Buyer against TRMI
and Texaco Inc. (“Texaco”) related to environmental contamination during the time period that TRMI
and Texaco (now Affiliates of CUSA) owned and operated the South Refinery:

1

 

     NOW, THEREFORE, in consideration of the mutual promises set forth in this Agreement, Sellers
and Buyers hereby agree as follows:

ARTICLE 1

DEFINITIONS

1.1 Defined Terms. As used in this Agreement, the following capitalized terms shall have the
respective meanings set forth below or in the respective referenced Sections.

     1988 Agreed Order. An administrative order relating to the investigation and remediation of
petroleum contamination associated with CUSA’s historical refining operations on the North Refinery
that was issued to CUSA by the Texas Water Commission (the predecessor agency to the TCEQ (as
defined below)) on October 11, 1988, as the terms and conditions of such order are in effect as of
the Closing Date. Any alteration by the TCEQ of regulatory obligations for Free Product Recovery
Activities unrelated to Buyers’ Remediation on the Transferred Properties shall be deemed
obligations of the 1988 Agreed Order, even if implemented through a separate order, to the extent
that any such incremental obligations (i) are the result of pre-Closing contamination and (ii) do
not involve soil or groundwater contamination at elevations that are above the Bright Line.

     Adjustment Amount. See Section 4.4.

     Affected Employees. See Section 11.1(d).

     Affiliate. With respect to a given Person, any other Person directly or indirectly
controlling, controlled by or under common control with the given Person. For purposes of this
definition “control” means ownership of fifty percent (50%) or more of the voting securities or
equivalent voting rights of a Person.

     Agreement. See Preamble.

     Applicable Contracts. The CUSA Applicable Contracts and the CPL Applicable Contracts defined
in Article 2, collectively.

     Applicable Permits. The CUSA Applicable Permits and the CPL Applicable Permits defined in
Article 2, collectively.

     Asbestos or Silica Related Disease Losses. Any Losses resulting from present or future causes
of action on any theory of recovery, regardless of by whom brought, arising out of the death or
injury of an individual from any exposure to asbestos, asbestos-containing products, silica, or
other pneumoconiosis-producing dust or material.

     Bright Line. The elevation that is three thousand six hundred thirty (3630) feet above mean
sea level as depicted on Schedule 3.

2

 

     Business Day. Any day other than a Saturday, a Sunday or any other day on which federal
banking institutions in the United States of America conducting business in the State of Texas are
required or authorized by Law to suspend such business.

     Buyers. See Recitals.

     Buyers’ Defined Contribution Plan. See Section 11.3(b).

     Buyers’ Health Care Plans. See Section 11.6(a).

     Buyers’ Pension Plan. See 11.2(b).

     Buyers’ Past Retirement Health Care Coverage. See Section 11.7(b).

     Buyers’ Remediation. Any investigation or remediation of Hazardous Materials on the
Transferred Properties, subsequently conveyed CUSA-Retained Properties after conveyance, or South
Refinery (without regard to whether such action is mandated by a Government Authority). Buyers’
Remediation does not include Sellers’ obligations under Sections 3.1(c), 3.1(d)(vii), 3.1(g)(vii),
9.4 or 9.5(a), (b), (c) or (e) of this Agreement. Buyers’ Remediation includes investigation or
remediation of Hazardous Materials at elevations that are above the Bright Line.

     Buyers’ Severance Pay Program. See Section 11.4(b).

     Buyers’ Vacation Pay Policy. See Section 11.5.

     CAMU. The Corrective Action Management Unit approved by the TCEQ in the CAMU Agreed Order.

     CAMU Agreed Order. An administrative order issued by the TCEQ as Docket No. 2002-0272-IHW on
March 20, 2002, including any subsequent amendments thereto.

     CAMU Portion of the Primary Option Property. See Section 2.4(k).

     ChevronTexaco Policies. See Section 9.1.

     Clean Air Act New Source Review Enforcement Actions. All current and future actions by a
Government Authority alleging non-compliance under the Clean Air Act (or analogous state statutes)
that are similar in nature to actions threatened or initiated against other refiners as part of the
United States Environmental Protection Agency’s nationwide enforcement initiative, which include
allegations under the following provisions:

     (i) New Source Review (NSR) requirements;

     (ii) Prevention of Significant Deterioration (PSD) requirements;

     (iii) New Source Performance Standards (NSPS) applicable requirements of 40 CFR 60
Subparts A and J for sulfur recovery units, fuel gas combustion devices, and fluid catalytic
cracking unit (FCCU) regenerators;

3

 

     (iv) New Source Performance Standards (NSPS) applicable requirements of 40 CFR 60
Subparts A and J for flares;

     (v) Benzene Waste Operations NESHAP (National Emission Standards for Hazardous Air
Pollutants) 40 CFR 61 Subparts A and FF and wastewater related provisions of 40 CFR 60
Subpart QQQ and 40 CFR 63 Subparts A, CC, and G; and

     (vi) Leak Detection and Repair (LDAR) requirements of 40 CFR 60, Subparts A, VV, GGG
and Appendix A-7 (Method 21); 40 CFR 63, Subparts A, F, H, CC; and 40 CFR 61, Subparts A, V,
J, FF, and BB.

     Clean Backfill. Soil that meets the criteria set forth in the TCEQ’s Risk Reduction Rule
Standard No. 2 in effect as of the Closing Date.

     Closing. See Section 5.1.

     Closing Date. See Section 5.2.

     Code. The U.S. Internal Revenue Code of 1986, as amended.

     Confidentiality Agreement. The Confidentiality Agreement dated December 19, 2002 between
Sellers and Buyers’ Affiliate, WRC Refining Company, and any related confidentiality agreements
executed by Buyers’ employees or representatives.

     Connection Agreements. See Section 6.1(p).

     Controlled Group. “Controlled group of corporations,” as defined in Internal Revenue Code
Section 1563(a), without giving effect to Internal Revenue Code Sections 1563(a)(4) and
1563(e)(3)(C).

     Corrective Action. Collectively, (i) any Free Product Recovery Activities conducted pursuant
to Section 9.4; (ii) Sellers’ remediation under Section 3.1(c) and (d)(vii); (iii) Sellers
remediation under Sections 3.1(g)(vii); and (iv) any Sellers’ SWMU Remediation performed pursuant
to Sections 95(a), (b), (c) or (e) of this Agreement. Corrective Action does not include any
environmental obligations of any kind not specifically covered in Sections 3.1(c), 3.1(d)(vii),
3.1(g)(vii), 9.4 or 9.5(a), (b), (c) and (e), or any improvements required for future operations at
a particular site, such as the addition, repair or replacement of any operating equipment (e.g.,
repair of leaking tanks or equipment).

     Corrective Action Conditions Precedent. The following conditions precedent to CUSA’s
obligations under Section 9.5(e):

     (i) the required corrective measure study or corrective measure is a compliance
obligation derived directly from the RCRA Permit;

     (ii) Refinery Buyer, either directly or indirectly, has not engaged in any
construction, demolition or excavation activities on the North Refinery (other than
activities associated with the reasonable and prudent operation of the North Refinery, as

4

 

such operations had been conducted immediately before the Closing Date) that, in whole
or in part, have precipitated the required corrective measure study or corrective measure;

     (iii) Refinery Buyer, either directly or indirectly, has not engaged in any soil
sampling/analysis, groundwater sampling/analysis, or sewer investigation activities on the
North Refinery in excess of that required by Laws and Applicable Permits, or engaged in any
discussions with any Government Authority in excess of that required by Laws and Applicable
Permits, that, in whole or in part, have precipitated the required corrective measure study
or corrective measure;

     (iv) The Internal Solid Waste Management Unit in question has not been impacted in any
respect by post-Closing releases or activities on the North Refinery or releases otherwise
attributable to Refinery Buyer; and

     (v) The TCEQ has not issued a closure letter or the equivalent for the Internal Solid
Waste Management Unit in question.

     Covered Expenses. See Section 11.6(a).

     CPL Applicable Contracts. See Section 2.2(c).

     CPL Applicable Permits. See Section 2.2(d).

     CPL Fixed Assets. See Section 2.2(b).

     CPL Properties. See Section 2.2.

     CPL Real Property. See Section 2.2(a).

     CPL Records. See Section 2.2(e).

     CPL-Retained Property. See Section 2.4(h).

     CUSA Applicable Contracts. See Section 2.1(c).

     CUSA Applicable Permits. See Section 2.1(d).

     CUSA Fixed Assets. See Section 2.1(b).

     CUSA Properties. See Section 2.1.

     CUSA Real Property. See Section 2.1(a).

     CUSA Records. See Section 2.1(e).

     CUSA-Retained Properties. The CUSA-Retained Option Property and the El Paso Asphalt Plant.

     CUSA-Retained Option Property. See Section 2.4(j).

5

 

     Default Interest Rate. An interest rate per annum equal to the lesser of (i) the Prime Rate
plus four percent (4%) or (ii) the highest rate permitted by applicable Laws.

     Deferred Properties. See Section 8.5(b).

     Deposit. See Section 4.1.

     December 2002 Settlement Agreement. See Recitals.

     Disclosure Letter. The letter from Sellers to Buyers setting forth the disclosures referenced
in Article 7 of this Agreement.

     Dollars or $. United States of America dollars.

     Eligible Affected Employees. See Section 11.7.

     El Paso Asphalt Plant. See Section 2.4(i).

     Environmental Losses. Losses relating to the presence, release, discharge or threatened
discharge of Hazardous Materials in or into the air, surface water, ground water, soil, land
surface, subsurface strata or soil vapor; Losses incurred in investigating and remediating such
presence, release, discharge or threatened discharge; and Losses relating to Hazardous Materials
(except asbestos, asbestos-containing products, silica, or other pneumoconiosis-producing dust or
material). Environmental Losses include investigatory costs mandated by a Government Authority
based upon suspected contamination by Hazardous Materials (except asbestos, asbestos-containing
products, silica, or other pneumoconiosis-producing dust or material). Environmental Losses
exclude (i) any claims of consequential damages suffered by any of Sellers, Buyers or their
Affiliates, including claims of lost profits, lost revenue or loss of use of facilities or assets,
(ii) any claims of punitive damages by any of Sellers, Buyers or their Affiliates and (iii) any
fines, penalties, costs, claims, judgments or demands arising out of any Clean Air Act New Source
Review Enforcement Actions.

     Equivalent Wage. See Section 11.1(b).

     Execution Date. See Preamble.

     FERC. Federal Energy Regulatory Commission.

     Free Product Recovery Activities. Remediation activities involving the recovery of a
phase-separate petroleum product from subsurface recovery wells, to the extent that such
phase-separate petroleum product was caused by operations prior to the Closing Date and that such
activities are required to be undertaken by CUSA in order to comply with the 1988 Agreed Order.
Free Product Recovery Activities include future requirements under the 1988 Agreed Order, if any,
to treat dissolved petroleum components in groundwater and vapor recovery (i) where such dissolved
components and/or vapors occur at elevations below the Bright Line and (ii) to the extent that the
presence of such petroleum components was caused by operations prior to the Closing Date of the
Transferred Properties or the CUSA-Retained Option Properties. Free Product Recovery Activities do
not include (w) any activities made necessary by the

6

 

operation of the South Refinery, (x) any activities made necessary by the operation of the
CUSA Properties or the CUSA-Retained Properties after the date such properties are acquired by the
Buyer, (y) Buyers’ Remediation, or (z) any work (except for Sellers’ obligations under Sections
3.1(c), 3.1(d)(vii), 3.1(g)(vii), 9.4 or 9.5(a), (b), (c) or (e) of this Agreement) relating to
investigation or remediation of Hazardous Materials on the Transferred Properties or subsequently
conveyed CUSA-Retained Properties after conveyance in both cases at elevations that are above the
Bright Line. Free Product Recovery Activities may be conducted through any remediation process
that CUSA deems appropriate, including the operation of dual pump extraction wells or vapor
extraction.

     Government Authority. Any national, state or local government or any subdivision, agency,
court, commission, board, bureau or other authority thereof.

     Hazardous Material. Any substance, product, waste or other material which is, or becomes
identified, listed, published or defined as a hazardous substance, hazardous waste, hazardous
material, toxic substance, solid waste or pollutant, or which is otherwise regulated or restricted
under any Laws or permits, licenses or other Government Authority approvals, including the
Comprehensive Environmental Response Compensation and Liability Act (CERCLA), the Superfund
Amendments and Reauthorization Act (SARA), the Hazardous Materials Transportation Act, the Resource
Conservation and Recovery Act (RCRA), the Toxic Substances Control Act (TSCA), the Clean Water Act
and the Oil Pollution Act of 1990 (OPA 90). Without limitation, Hazardous Material includes
hydrocarbons, asbestos and polychlorinated biphenyls.

     Heavy Straight Run Gasoline. Petroleum product having a gas chromatogram consistent with that
depicted on Schedule 19.

     Hire Date. See Section 11.1(c).

     HSR Act. See Section 8.5(a).

     Indemnitee. A Person that is the express beneficiary of any of the express indemnity
provisions of this Agreement.

     Indemnitor. A Party that is the obligor under any of the express indemnity provisions of this
Agreement.

     Internal Solid Waste Management Units. Separate sites that as of the Execution Date are
located on the Internal Solid Waste Management Unit Parcels. These sites consist of RCRA Unit No.
2 and the solid waste management units designated on Schedule 15.

     Internal Solid Waste Management Unit Parcels. Separate real property parcels, containing the
Internal Solid Waste Management Units and adjacent property to be retained by CUSA as of the
Closing Date as part of the CUSA-Retained Properties. A map identifying each of the retained
Internal Solid Waste Management Unit Parcels is included in Schedule 15 attached to this
Agreement.

     Inventories. See Section 2.3.

7

 

     July 1998 Settlement Agreement. The Settlement Agreement between CUSA and Refinery Buyer
dated as of July 1, 1998.

     Laws. All applicable statutes, laws, rules, regulations, orders, permits, ordinances,
judgments, decrees, directives, instructions, and interpretations of any Government Authority,
including common law, equity and other legal principles.

     Liens. All pledges, mortgages, charges, security interests, options, rights of first refusal
or first offer, preemptive rights or any other encumbrances or liens of any kind in respect of any
of the Transferred Properties.

     Losses. All liabilities, losses, damages, penalties (civil or criminal), expenses (including
reasonable attorneys’ fees), fines, settlements, interest, suits, causes of action, legal or
administrative proceedings, arbitration awards, demands or claims, including claims for personal
injury or damage to property. Losses may include claims of consequential or punitive damages
sought by third parties against any of Sellers, Buyers or their Affiliates, and include
Environmental Losses defined above, but exclude (i) any claims of consequential damages suffered by
any of Sellers, Buyers or their Affiliates, including claims of lost profits, lost revenue or loss
of use of facilities or assets, (ii) any claims of punitive damages by any of Sellers, Buyers or
their Affiliates and (iii) any fines, penalties, costs, claims, judgments or demands arising out of
any Clean Air Act New Source Review Enforcement Actions.

     Measured Inventories. See Section 2.3.

     NAPL. Phase separate petroleum product, including phase separate crude oil.

     North Refinery. See Section 2.1.

     Notice Triggering Buyers’ Option Period. See Section 9.5(d).

     Notice Triggering Sellers’ Option Period. See Section 9.5(c).

     Operating Agreement. See Recitals.

     Party. CUSA, CPL, Refinery Buyer or Pipeline Buyer.

     Permitted Encumbrances. Any of the following:

     (i) Liens for Taxes or assessments not yet due or delinquent or, if delinquent, that
are being contested in good faith in the normal course of business;

     (ii) all rights to consent by, required notices to, filings with, or other actions by
governmental entities in connection with the sale or conveyance of the applicable property,
if the same are customarily obtained subsequent to such sale or conveyance;

     (iii) easements, road-use agreements, rights-of-way, servitudes, permits, surface
leases and other rights in respect of surface operations, or defects or deficiencies

8

 

in title thereto, that do not materially interfere with Buyers’ operation or use of the
applicable property;

     (iv) zoning, planning and environmental Laws to the extent valid and applicable to the
applicable property; and

     (v) Liens of carriers, warehousemen, mechanics, workers, material suppliers or other
providers of materials or services arising by operation of Law in the ordinary course of
business or incident to the construction or improvement of any property in respect of
obligations which are not yet due.

     Person. Any individual, partnership, corporation, limited liability company, business trust,
joint stock company, trust, unincorporated association, joint venture, firm, Government Authority
or other entity or person.

     Pipeline Buyer. See Preamble.

     Primary Option Property. The property referred to in the Option Agreement attached hereto as
Exhibit L as the Primary Option Property and depicted on Schedule 15 hereto,
including the CAMU Portion of the Primary Option Property.

     Prime Rate. An interest rate per annum equal to the interest rate last published as the
“Prime Rate” by The Wall Street Journal on or immediately prior to the date a given obligation
first becomes due. Such published rate is defined by The Wall Street Journal as the base rate on
corporate loans posted by at least 75% of the 30 largest U.S. banks.

     Prospective Employees. See Section 11.1(a).

     Purchase Price. See Section 4.2.

     RCRA Permit. Resource Conservation and Recovery Act Permit No. HW50159-000 issued to CUSA by
the TCEQ, including any renewal thereof.

     RCRA Units. Units, in addition to the Internal Solid Waste Management Units, for which
Sellers hold one or more permits pursuant to Part B of the federal Resource Conservation and
Recovery Act.

     Refinery Buyer. See Preamble.

     Refinery Buyer Properties. The North Refinery, the South Refinery and any portion of the
CUSA-Retained Properties that, as of a given date or time period, has been conveyed to Refinery
Buyer.

     Refinery Union. See Section 7.1(i).

     Remaining Employees. See Section 11.1(d).

     Remediation Objectives. See Section 9.5(c).

9

 

     Represented Employees. See Section 11.1(a).

     Sellers. See Recitals.

     Sellers’ Bank Account. Account number 59-51755 in the name of Chevron Products Co., a
Division of Chevron U.S.A. Inc., at the Chicago, Illinois principal office of BankOne, N.A.,
American Banking Association (“ABA”) number 0710-0001-3, or such other account as Sellers may
designate by written notice to Buyer more than three Business Days prior to the payment date of any
payment obligation of Buyer under this Agreement.

     Sellers’ Defined Contribution Plan. See Section 11.3(a).

     Sellers’ Pension Plan. See Section 11.2(a).

     Sellers’ Post-Retirement Health Care Coverage. See Section 11.7(a).

     Sellers’ Severance Pay Plans. See Section 11.4(a).

     Sellers’ SWMU Remediation. Any action undertaken by Sellers to address Sellers’ obligations
under Sections 9.5(a), (b), (c) or (e) consisting of investigation or remediation of Hazardous
Materials required by the RCRA Permit at any of the Internal Solid Waste Management Units.

     Settlement Estimate. See Section 4.4.

     Settlement Statement. See Section 4.4.

     South Refinery. See Recitals.

     South Refinery PLL Insurance Policy. The Pollution Legal Liability Select Clean-Up Cost Cap
insurance policy issued by Commerce and Industry Insurance Company, an Affiliate of American
International Group, Inc., to Refinery Buyer as Primary Named Insured as of December 31, 1999, as
amended.

     South Refinery Remediation Equipment. All remediation assets that are used solely for
investigation and remediation of Hazardous Materials conditions on the South Refinery as listed on
Schedule 10 hereto.

     Tax (or Taxes). Any and all fees (including, without limitation, documentation, license,
recording, filing and registration fees), taxes (excluding taxes based on or measured by net income
or profits, but including, without limitation, production, gross receipts, ad valorem, value added,
windfall profit, environmental, turnover, sales, use, personal property (tangible and intangible),
stamp, leasing, lease, user, leasing use, excise, franchise, transfer, heating value, fuel, excess
profits, occupational, interest equalization, lifting, oil, gas, or mineral production or
severance, and other taxes), levies, imposts, duties, charges or withholdings of any nature
whatsoever, imposed by any Government Authority or taxing authority thereof, domestic or foreign,
together with any and all penalties, fines, additions to tax and interest thereon, whether or not
such tax shall be existing or hereafter adopted.

10

 

     Tax-Deferred Exchange. See Section 10.3.

     Tar Return. Any return, report, statement, form or other documentation (including any
additional or supporting material, amendments or supplements, information return, claim for refund,
amended return or declaration of estimated tax) filed or maintained, or required to be filed or
maintained, with respect to or in connection with the calculation, determination; assessment or
collection of any Taxes or taxes based on or measured by net income or profits.

     TCEQ. Texas Commission on Environmental Quality and its predecessors (including the Texas
Natural Resource Conservation Commission and the Texas Water Commission) or successors or any other
government agency to which TCEQ has delegated authority over an environmental matter.

     Texaco. See Recitals.

     Third-Party Action. A lawsuit, arbitration proceeding or other judicial or administrative
adversary proceeding filed by a Person other than a Government Authority, any of the Buyers, or any
entity that any of the Buyers directly or indirectly holds an interest in and their respective
directors, officers, employees or representatives.

     Title Company. See Section 6.2(v).

     TPH. Total Petroleum Hydrocarbons.

     Transferred Pipelines. See Section 2.2.

     Transferred Properties. The CUSA Properties, the CPL Properties, and the Inventories. The
term “Transferred Properties” does not include any CUSA-Retained Properties or CPL-Retained
Properties, even if such properties are conveyed to any of the Buyers subsequent to the Closing
Date.

     Transferred Working Capital. The net value of current assets minus current liabilities as
described and defined in Section 4.3.

     TRMI. See Recitals.

     TRRC. The Texas Railroad Commission.

     Unaudited Financial Data. See Section 7.1(k).

1.2 Rules of Construction. For the purposes of this Agreement, unless the context otherwise
requires:

     (a) General. In any provision, (i) “or” is not exclusive; (ii) “including” and “include” are
not exclusive; (iii) an accounting term not otherwise defined has the meaning assigned to it in
accordance with accounting principles that are generally accepted in the United States of America;
(iv) words in the singular include the plural and words in the plural include the singular; (v) words in the masculine include the feminine; (vi) any date specified for any
action

11

 

that is not a Business Day means the first Business Day after such date; and (vii) a
reference to a corporation, limited liability company or partnership includes its successors and
permitted assigns.

     (b) Articles and Sections. References to Articles and Sections without identifying a specific
agreement shall be deemed references to Articles and Sections of this Agreement. The captions of
Articles and Sections are for convenience of reference only and shall not be used in the
interpretation of this Agreement.

     (c) Agreements and Instruments. References to this Agreement or any other agreement or
instrument shall be deemed references to such agreement or instrument as it may from time to time
be amended, and shall be deemed to include reference to any schedules, exhibits or other materials
incorporated into such agreement or instrument.

ARTICLE 2

PURCHASE AND SALE OF TRANSFERRED PROPERTIES

2.1 CUSA Properties. At the Closing, CUSA shall sell, convey, transfer and assign to Refinery
Buyer and Refinery Buyer shall purchase and receive from CUSA all right, title and interest of CUSA
in and to CUSA’s crude oil refinery and light products marketing terminal at El Paso, Texas and the
assets associated with the crude oil refinery and light products marketing terminal (the “North
Refinery”), being more particularly described as follows (collectively the “CUSA Properties”):

     (a) CUSA Real Property. The fee properties, surface leases, easements and other real property
interests relating to the North Refinery, as described in Schedule 1 attached to this
Agreement, including all real property rights appurtenant thereto (the “CUSA Real Property”);

     (b) CUSA Fixed Assets. The plant and production equipment, South Refinery Remediation
Equipment, machinery, furnishings, vehicles, fixtures, roads, pipelines, tanks, appurtenances,
materials, improvements, storehouse inventory, spare parts, chemicals inventory and other property
(excluding Inventories separately defined and transferred under Section 2.3 below, and excluding
those assets separately listed or scheduled under Section 2.4 below) dedicated solely to the North
Refinery or the South Refinery, which either are located on the CUSA Real Property or the South
Refinery on the Closing Date or are otherwise described in Schedule 2 attached to this
Agreement, together with the benefits of any manufacturer’s or vendor’s warranties or undertakings
related thereto to the extent transferable by CUSA (the “CUSA Fixed Assets”);

     (c) CUSA Applicable Contracts and Air Emission Reduction Credits. To the extent assignable by
CUSA, the contracts of CUSA relating to the ownership or operation of the foregoing assets, as
described in Schedule 4 attached to this Agreement (the “CUSA Applicable Contracts”), and
the air emission reduction credits recognized under existing or future Law with respect to emission
levels or reductions in emission levels at or from the CUSA Properties with respect to periods on or prior to the Closing Date (other than those emission credits
specifically excluded under Section 2.4(m) below);

12

 

     (d) CUSA Applicable Permits. To the extent transferable by CUSA, the licenses, permits and
other approvals issued by Government Authorities to CUSA relating to the ownership or operation of
the foregoing assets, as described in Schedule 5 attached to this Agreement (the “CUSA
Applicable Permits”); and

     (e) CUSA Records. Subject to the provisions of Sections 2.4(l) and 12.10 below, the files,
records and other information relating to the foregoing assets owned by CUSA available through
CUSA’s commercially reasonable efforts to locate such information and which CUSA is not prohibited
from transferring to Buyers by Laws, Applicable Permits or existing contractual relationships
(collectively the “CUSA Records”), including (i) lease, land and title records and (ii) the
Applicable Contracts and Applicable Permits documents to which CUSA is a party.

2.2 CPL Properties. At the Closing, CPL shall sell, transfer and assign to Pipeline Buyer and the
Pipeline Buyer shall purchase and receive from CPL all right, title and interest of CPL in and to
the crude oil pipelines and the assets associated with the crude oil pipelines from Colorado City
to Snyder, Texas, from Snyder to Wink, Texas, from McCamey to Wink, Texas, and from Wink to El
Paso, Texas (the “Transferred Pipelines”), together with associated gathering systems and tank
farms, as more particularly described in Schedules 6 and 7 attached to this Agreement, and
all being more particularly described as follows (collectively the “CPL Properties”):

     (a) CPL Real Property. The fee properties, surface leases, easements and other real property
interests described in Schedule 6 attached to this Agreement, including all real property
rights appurtenant thereto (the “CPL Real Property”);

     (b) CPL Fixed Assets. The pipelines, pump stations, tanks, equipment, machinery, furnishings,
fixtures, roads, appurtenances, materials, improvements, spare parts, and other property (excluding
those assets separately listed or scheduled under Section 2.4 below) dedicated solely to the CPL
Real Property, which either are located on the CPL Real Property as of the Closing Date or are
otherwise described in Schedule 7 attached to this Agreement, together with the benefits of
any manufacturer’s or vendor’s warranties or undertakings relating thereto to the extent
transferable by CPL (the “CPL Fixed Assets”);

     (c) CPL Applicable Contracts. To the extent assignable by CPL, the contracts of CPL relating
to the ownership or operation of the foregoing assets, as described in Schedule 8 attached
to this Agreement (the “CPL Applicable Contracts”);

     (d) CPL Applicable Permits. To the extent transferable by CPL, the licenses, permits and
other approvals issued by Government Authorities to CPL relating to the ownership or operation of
the foregoing assets described in Schedule 9 attached to this Agreement (the “CPL
Applicable Permits”); and

     (e) CPL Records. Subject to the provisions of Sections 2.4(l) and 12.10 below, the files,
records and other information relating to the foregoing assets owned by CPL available through CPL’S commercially reasonable efforts to locate such information and which CPL is not
prohibited from transferring to Buyers by Laws, Applicable Permits or existing contractual
relationships (collectively the “CPL Records”), including (i) lease, land and title records and
(ii) the Applicable Contracts and Applicable Permits documents to which CPL is a party.

13

 

2.3 Inventories. At the Closing, CUSA shall sell, convey, transfer and assign to Refinery Buyer
and Refinery Buyer shall purchase and receive from CUSA all right, title and interest of CUSA in
and to the crude oil, refined products (including carbon black and sulfur), materials in process,
fresh and spent sulfuric acid, product additives and dyes, and other refining products or
by-products, whether gaseous or liquid, owned by CUSA as of the Closing Date and located on any of
the CUSA Properties or CPL Properties (or at offsite locations to the extent described in
Schedule 11 attached to this Agreement) (collectively the “Inventories”). The portion of
the Inventories not located within refinery process units or refinery process piping (the “Measured
Inventories”) shall be measured as of the Closing Date and valued separately as provided in
Schedule 11.

2.4 Excluded Items. Notwithstanding the foregoing Sections of this Article 2, the following items
are excluded from the Transferred Properties:

     (a) Cash and Cash Equivalents. Cash located at the Transferred Properties, deposits with
Government Authorities, contractors and vendors, and other cash equivalents, to the extent that
such cash was generated from transactions occurring on or prior to the Closing Date or such deposit
was made on or prior to the Closing Date;

     (b) Insurance Policies. The insurance policies pertaining to the assets and claims of Sellers
of every nature and description under or arising out of such insurance policies, including any
refundable premiums relating to such policies;

     (c) Ordinary Course Dispositions. Items used, consumed or otherwise disposed of in the
ordinary course of business prior to the Closing or with the applicable Buyer’s consent;

     (d) Property Owned by Third Parties and Contractors. The property (including hydrocarbons)
owned by third parties or by contractors located on any of the Transferred Properties;

     (e) SCADA System. The supervisory control and data acquisition (SCADA) system associated with
the CPL-Retained Properties, or any software or other systems used for monitoring and control of
such properties from remote locations;

     (f) Certain Information Technology Hardware. Certain computer and telecommunications equipment
and hardware (including personal computer, satellite and microwave communication systems) presently
located on the Transferred Properties, as more particularly set forth as excluded items in
Schedule 13;

     (g) Certain Intellectual Property. Any right to use the “ChevronTexaco”, “Chevron” or
“Texaco” names, logos, hallmarks or other designs and insignia, trademarks, service marks or other
company identity, and all rights to technology, software and other intellectual property not
dedicated solely to the operation and maintenance of the Transferred Properties, as the excluded
technology and software ownership or license rights are described in Schedule 13 attached
to this Agreement;

     (h) CPL-Retained Property. All CPL facilities not dedicated solely to the Transferred
Pipelines included in the CPL Properties, including the 10-inch products pipeline to

14

 

Albuquerque, New Mexico; the 8-inch products pipeline to Ciudad Juárez, Mexico; the El Paso Pipeline Station
assets as more particularly described in Schedule 13 and other assets of CPL listed in
Schedule 13 (collectively the “CPL-Retained Property”);

     (i) El Paso Asphalt Plant. The property constituting the El Paso Asphalt Plant subject to the
Right of First Refusal Agreement — Southwest Asphalt Business attached as Exhibit J to this
Agreement, including all real, mixed and personal property, contracts and permits associated with
such property (the “El Paso Asphalt Plant”);

     (j) CUSA-Retained Option Property. The property constituting the CUSA-Retained Option
Property subject to the Option Agreement attached as Exhibit L to this Agreement,
consisting of the Internal Solid Waste Management Unit Parcels and the Primary Option Property, and
all real, mixed and personal property, contracts and permits associated with such properties (the
“CUSA-Retained Option Property”);

     (k) CAMU Portion of the Primary Option Property. The CAMU and certain adjacent real property
and other property included in the Primary Option Property as more particularly described in
Exhibit L and depicted on Schedule 15.

     (l) Certain Records. Records that are subject to the attorney-client privilege, work product
immunity or other privileges or immunities against disclosure enjoyed by Sellers or their
representatives, and records pertaining to (i) Sellers’ marketing or strategic research and
planning, (ii) Sellers’ employees except as provided in Section 11.1(f), or (iii) Sellers’ retained
assets or liabilities,

     (m) Emissions Credits. Any fuel credits relating to sulfur content in gasoline, winter
oxygenate and anti-dumping programs, and any carbon credits, recognized under existing or future
Law with respect to emission levels or reductions in emission levels at or from the Transferred
Properties, the CUSA-Retained Properties or the CPL-Retained Properties with respect to periods on
or prior to the Closing Date;

     (n) Sellers’ Claims Against Third Parties. All claims against third parties (excluding Buyers
and Sellers and their Affiliates) arising out of Losses, including Environmental Losses, and other
present or future claims by Sellers, that relate either to the ownership or operation of the
Transferred Properties with respect to time periods on or prior to the Closing Date or to the
ownership or operation of any portion of the CUSA-Retained Properties with respect to time periods
on or prior to the date of conveyance to the Refinery Buyer of any such portion, or to performance
of Sellers’ obligations under this Agreement after the Closing Date. Notwithstanding the foregoing, Sellers shall promptly notify Buyers of, and upon written
request, assign to Buyers, without recourse or warranty, the portion of any claims Sellers may have
against third parties (excluding Sellers and their Affiliates) to the extent such claims relate to
the ownership or operation of the Transferred Properties with respect to time periods on or prior
to the Closing Date or to the ownership or operation of any portion of the CUSA-Retained Properties
with respect to time periods on or prior to the date of conveyance to the Refinery Buyer of any
such portion, to the extent Buyers have indemnified Sellers and their Affiliates under this
Agreement with respect to Losses relating to such ownership or operation; and

15

 

     (o) Specifically Excluded Items. The additional items specifically excluded from the
transaction as listed on Schedule 13.

2.5 Conveyancing Instruments. The fee real property to be conveyed at Closing shall be conveyed by
means of special warranty deeds in the form of Exhibit A attached to this Agreement. The
rights-of-way and other easements to be transferred at Closing shall be transferred by means of
deeds for easement in the form of Exhibits B-1 and B-2 attached to this Agreement. Leases
and other contract rights to be conveyed or transferred at Closing shall be transferred by means of
assignment and assumption agreements in the form of Exhibits C-1 and C-2 attached to this
Agreement, or such assignment forms as may be prescribed by applicable Government Authorities. The
personal property to be transferred at Closing, including the Inventories, shall be transferred by
means of bills of sale in the form of Exhibits D-1 and D-2 attached to this Agreement. The
transferable Applicable Permits will be transferred by means of appropriate forms consistent with
the requirements of the applicable Government Authority. Certain rights-of-way and other easements
appurtenant to the Transferred Properties, the CPL-Retained Properties and the CUSA-Retained
Properties, and certain easements in gross, shall be created and governed by means of easement
agreements in the form of Exhibits E-1 and E-2 attached to this Agreement, as applicable.

ARTICLE 3

INDEMNIFICATION OF LIABILITIES

3.1 Losses Indemnified by Sellers.

     (a) CUSA Breaches. CUSA shall indemnify, defend and hold harmless Refinery Buyer from and
after the Closing against any Losses attributable to a breach of CUSA’s representations and
warranties under Section 7.1 of this Agreement, provided that (i) any claim made pursuant to this
Section 3.1(a) shall be void unless notice of such claim is given to Sellers within two (2) years
after the Closing Date; (ii) the Losses for any claim made pursuant to this Section 3.1(a) must
individually exceed Two Hundred Fifty Thousand Dollars ($250,000); and (iii) CUSA’s liability for
all Losses for all claims made by Refinery Buyer pursuant to this Section 3.1(a) shall not exceed
Twenty Million Dollars ($20,000,000) in the aggregate.

     (b) CPL Breaches. CPL shall indemnify, defend and hold harmless Pipeline Buyer from and after
the Closing against any Losses attributable to a breach of CPL’s representations and warranties
under Section 7.2 of this Agreement, provided that (i) any claim made pursuant to this Section
3.1(b) shall be void unless notice of such claim is given to Sellers within two (2) years after the
Closing Date; (ii) the Losses for any such claim made pursuant to this Section 3.1(b) must
individually exceed Two Hundred Fifty Thousand Dollars ($250,000); and (iii) CPL’s liability for
all Losses for all claims made by Pipeline Buyer pursuant to this Section 3.1(b) shall not exceed
Twenty Million Dollars ($20,000,000) in the aggregate.

     (c) Contamination on CUSA-Retained Properties. From and after the Closing, CUSA shall
indemnify, defend and hold harmless Refinery Buyer and its Affiliates (including their respective
directors, officers, employees and representatives) against all Environmental Losses attributable
to any contamination from CUSA’s or its Affiliates’ ownership, operation,

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maintenance, improvement or use of the CUSA-Retained Properties, until and except to the extent that any individual portion
of the CUSA-Retained Properties is transferred to Refinery Buyer or its designee. Upon conveyance
of any portion of the CUSA-Retained Properties, this Section 3.1(c) shall be superseded by Section
3.1(g) for covered Losses associated with such conveyed portion claimed by an Indemnitee after such
conveyance.

     (d) Certain Claims Regarding CUSA Properties. From and after the Closing, CUSA shall
indemnify, defend and hold harmless Refinery Buyer and its Affiliates (including their respective
directors, officers, employees and representatives) against:

     (i) Losses (excluding Asbestos or Silica Related Disease Losses) resulting from injury
or death to persons caused by the on-site exposure to Hazardous Materials and which are
asserted in a Third-Party Action where liability is attributable to the ownership,
operation, maintenance, improvement or use of the CUSA Properties on or prior to the Closing
Date, provided that any claim made against CUSA under this Section 3.1(d)(i) shall be void
unless notice of the respective Third-Party Action shall have been given to Sellers within
three (3) years after the Closing Date;

     (ii) Losses (excluding Environmental Losses and Asbestos or Silica Related Disease
Losses) resulting from a Third-Party Action attributable to the ownership, operation,
maintenance, improvement or use of the CUSA Properties on or prior to the Closing Date,
provided that any claim made against CUSA under this Section 3.1(d)(ii) shall be void unless
notice of the respective Third-Party Action shall have been given to Sellers within three
(3) years after the Closing Date;

     (iii) Asbestos or Silica Related Disease Losses to the extent such Losses relate to
exposures or alleged exposures occurring prior to the Closing Date at any of the CUSA
Properties, provided that except as described in Section 3.3(e) any claim made against CUSA
under this Section 3.1(d)(iii) shall be void to the extent it relates to any person who
worked (as an employee or independent contractor or otherwise) after the Closing Date at
either the Refinery Buyer Properties or the CPL Properties acquired by the Pipeline Buyer;

     (iv) Losses asserted in a Third-Party Action or in an action brought by a Government
Authority based on the migration offsite from the CUSA Properties of either soil, air or
groundwater contamination caused by operations on or prior to the Closing Date on the CUSA
Properties;

     (v) Losses that are fines or civil penalties brought by a Government Authority to the
extent relating to activities or alleged activities occurring on or prior to the Closing
Date at any of the CUSA Properties (for the avoidance of doubt, excluding fines, penalties,
costs, claims, judgments and demands arising out of Clean Air Act New Source Review
Enforcement Actions);

     (vi) Losses attributable to the offsite treatment, recycling, reclamation and/or
disposal of Hazardous Materials transported from any of the CUSA Properties to a third-party
offsite disposal facility on or prior to the Closing Date; and

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     (vii) the cost of CUSA performing any order by a Government Authority requiring
investigative or remediation work with respect to any drums or other containers of
non-hydrocarbon waste buried on the CUSA Properties, or trenches containing tetraethyl lead
or spent catalyst, in existence as of the Closing Date (but, as to this subsection (vii)
only, excluding liability of CUSA with respect to any materials associated with historical
refinery operations, such as crude oil, refined products, or hexavalent chromium from
cooling tower operations). In the event a claim is validly made pursuant to this subsection
(vii), CUSA shall only be liable for the cost of the work provided that CUSA is provided the
right to conduct the work, the exclusive right to negotiate regulatory requirements
pertaining to the government order and the necessary access under the Easement Agreement to
perform such work and CUSA’s obligations under this subsection (vii) shall terminate if the
Refinery Buyer discontinues refining operations on the CUSA Properties or the use of the
property affected by the government order is changed to a use other than petroleum refining.

     (e) Certain Claims Regarding CPL Properties. From and after the Closing, CPL shall indemnify,
defend and hold harmless Pipeline Buyer and its Affiliates (including their respective directors,
officers, employees and representatives) against:

     (i) Losses (excluding Asbestos or Silica Related Disease Losses) resulting from injury
or death to persons caused by the on-site exposure to Hazardous Materials and which are
asserted in a Third-Party Action where liability is attributable to the ownership,
operation, maintenance, improvement or use of the CPL Properties on or prior to the Closing
Date, provided that any claim made against CPL under this Section 3.1(e)(i) shall be void
unless notice of the respective Third-Party Action shall have been given to Sellers within
three (3) years after the Closing Date;

     (ii) Losses (excluding Environmental Losses and Asbestos or Silica Related Disease
Losses) resulting from a Third-Party Action attributable to the ownership, operation,
maintenance, improvement or use of the CPL Properties on or prior to the Closing Date,
provided that any claim made against CPL under this Section 3.1(e)(ii) shall be void unless notice of the respective Third-Party Action shall have been given
to Sellers within three (3) years after the Closing Date;

     (iii) Asbestos or Silica Related Disease Losses to the extent such Losses relate to
exposures or alleged exposures occurring prior to the Closing Date at any of the CPL
Properties, provided that except as described in Section 3.3(e) any claim made against CPL
under this Section 3.1(e)(iii) shall be void to the extent it relates to any person who
worked (as an employee or independent contractor or otherwise) after the Closing Date at
either the CPL Properties acquired by the Pipeline Buyer or the Refinery Buyer Properties;

     (iv) Losses asserted in a Third-Party Action or in an action brought by a Government
Authority based on the offsite migration from the CPL Properties of either soil, air or
groundwater contamination caused by operations on or prior to the Closing Date on the CPL
Properties, provided that any claim made against CPL under this

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Section 3.1(e)(iv) shall be void unless notice of the respective Third-Party Action shall have been given to Sellers
within three (3) years after the Closing Date;

     (v) Losses that are fines or civil penalties brought by a Government Authority to the
extent relating to activities or alleged activities occurring on or prior to the Closing
Date at any of the CPL Properties (for the avoidance of doubt, excluding fines, penalties,
costs, claims, judgments and demands arising out of Clean Air Act New Source Review
Enforcement Actions);

     (vi) Losses attributable to the offsite treatment, recycling, reclamation and/or
disposal of Hazardous Materials transported from any of the CPL Properties to a third-party
offsite disposal facility on or prior to the Closing Date; and

     (vii) Losses attributable to the Snyder release on August 24, 2000, the Guadalupe
Milepost 105 release on February 12, 2003, the North Reeves release on March 17, 2003, the
Sharon Ridge MP 2.7 release on September 17, 1999, the Cordona Lake Station release on
February 14, 2002, the Mason Station release on January 5, 2003, the Milepost 13 release of
unknown date, the North Snyder Station release on April 24, 2003 and the Plains Tank Farm
release on April 14, 2003. In the event a claim is validly made pursuant to this subsection
(vii), CPL shall only be liable for the Losses attributable to such releases provided that:
1) Pipeline Buyer, either directly or indirectly, has not engaged in any soil
sampling/analysis, groundwater sampling/analysis, or other investigation activities in, on,
or around the relevant release site in excess of that required by Laws and Applicable
Permits, or engaged in any discussions with any Government Authority in excess of that
required by Laws and Applicable Permits, that, in whole or in part, precipitated the
required corrective measure study or corrective measure for which indemnity is sought
pursuant to this subsection (vii), 2) no reportable release has occurred in, on, or around
the relevant release site subsequent to either the Closing Date or the date upon which CPL
provides Pipeline Buyer with confirmation sampling test results indicating that the soils
remaining at the release site are less than 1% TPH, whichever occurs later, 3) CPL is
provided the right to conduct any work related to the cleanup of such releases, 4) CPL is
provided the exclusive right to negotiate any regulatory requirements, and 5) CPL is provided the necessary access under the Easement Agreement
to perform such work. CPL’s obligations under this subsection (vii) shall terminate in its
entirety if the use of any portion of the CPL Properties is changed to a use other than to
transport crude oil or, as to each specific release site, if CPL obtains a closure letter
from the Government Authority with oversight responsibilities for the specific release site
and provides said closure letter to Pipeline Buyer.

     (f) Certain Claims Regarding South Refinery Operation. From and after the Closing, CUSA shall
indemnify, defend and hold harmless Refinery Buyer and its Affiliates (including their respective
directors, officers, employees and representatives) against:

     (i) Losses (excluding Asbestos or Silica Related Disease Losses) resulting from injury
or death to persons caused by the on-site exposure to Hazardous Materials and which are
asserted in a Third-Party Action where liability is attributable to CUSA’s operation,
maintenance, improvement or use of the South Refinery on or prior to the

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Closing Date, provided that any claim made against CUSA under this Section 3.1(f)(i) shall be void unless
notice of the respective Third-Party Action shall have been given to Sellers within three
(3) years after the Closing Date;

     (ii) Losses (excluding Environmental Losses and Asbestos or Silica Related Disease
Losses) resulting from a Third-Party Action attributable to CUSA’s operation, maintenance,
improvement or use of the South Refinery on or prior to the Closing Date; provided that any
claim made against CUSA under this Section 3.1(f)(ii) shall be void unless notice of the
respective Third-Party Action shall have been given to Sellers within three (3) years after
the Closing Date

     (iii) Asbestos or Silica Related Disease Losses to the extent such Losses relate to
exposures or alleged exposures occurring during CUSA’s operation of the South Refinery,
provided that except as described in Section 3.3(e) any claim made against CUSA under this
Section 3.1(f)(iii) shall be void to the extent it relates to any person who worked (as an
employee or independent contractor or otherwise) after the Closing Date at either the
Refinery Buyer Properties or the CPL Properties acquired by the Pipeline Buyer;

     (iv) Losses attributable to the offsite treatment, recycling, reclamation and/or
disposal of Hazardous Materials transported or caused to be transported by CUSA from the
South Refinery prior to the Closing Date; and

     (v) Losses that are fines or civil penalties brought by a Government Authority with
respect to CUSA’s operation of the South Refinery prior to the Closing Date (for the
avoidance of doubt, excluding fines, penalties, costs, claims, judgments and demands arising
out of Clean Air Act New Source Review Enforcement Actions).

     (g) Certain Claims Regarding Subsequently Conveyed CUSA Retained Properties. From and after
each closing subsequent to the Closing Date of the transfer of all or a portion of the
CUSA-Retained Properties, with respect to the property conveyed at such subsequent closing, CUSA shall indemnify, defend and hold harmless Refinery Buyer and its Affiliates
(including their respective directors, officers, employees and representatives) against:

     (i) Losses (excluding Asbestos or Silica Related Disease Losses) resulting from injury
or death to persons caused by the on-site exposure to Hazardous Materials and which are
asserted in a Third-Party Action where liability is attributable to the ownership,
operation, maintenance, improvement or use of the CUSA-Retained Properties on or prior to
the Closing Date, provided that any claim made against CUSA under this Section 3.1(g)(i)
shall be void unless notice of the respective Third-Party Action shall have been given to
Sellers within three (3) years after the Closing Date;

     (ii) Losses (excluding Environmental Losses and Asbestos or Silica Related Disease
Losses, resulting) from a Third-Party Action attributable to the ownership, operation,
maintenance, improvement or use of the CUSA-Retained Properties on or prior to the Closing
Date, provided that any claim made against CUSA under this

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Section 3.1(g)(ii) shall be void unless notice of the respective Third-Party Action shall have been given to Sellers within
three (3) years after the Closing Date;

     (iii) Asbestos or Silica Related Disease Losses to the extent such Losses relate to
exposures or alleged exposures occurring prior to the Closing Date at any of the CUSA
Retained Properties, provided that except as described in Section 3.3(e) any claim made
against CUSA under this Section 3.1(g)(iii) shall be void to the extent it relates to any
person who worked (as an employee or independent contractor or otherwise) after the Closing
Date at either the Refinery Buyer Properties or the CPL Properties acquired by the Pipeline
Buyer;

     (iv) all Losses asserted in a Third-Party Action or in an action brought by a
Government Authority based on the migration offsite of the Refinery Buyer Properties of
either soil, air or groundwater contamination caused by operations on any portion of the
CUSA-Retained Properties on or before the date of transfer to Refinery Buyer of such
portion;

     (v) any Losses that are fines or civil penalties brought by a Government Authority to
the extent relating to activities or alleged activities occurring at any portion of the
CUSA-Retained Properties on or before the date of transfer to Refinery Buyer of such portion
(for the avoidance of doubt, excluding fines, penalties, costs, claims, judgments and
demands arising out of Clean Air Act New Source Review Enforcement Actions);

     (vi) all Losses attributable to the offsite treatment, recycling, reclamation and/or
disposal of Hazardous Materials transported from any portion of the CUSA-Retained Properties
to a third-party offsite disposal facility on or before the date of transfer to Refinery
Buyer of such portion; and

     (vii) the cost of CUSA performing any order by a Government Authority requiring
investigative or remediation work with respect to any drums or other containers of
non-hydrocarbon waste buried on the property adjacent to the Internal Solid Waste Management Units included in the Internal Solid Waste Management Unit Parcels, or
trenches containing tetraethyl lead or spent catalyst, in existence as of the date of
transfer to Refinery Buyer of any such Internal Solid Waste Management Unit Parcel (but, as
to this subsection (vii) only, excluding liability of CUSA with respect to any materials
associated with historical refinery operations, such as crude oil, refined products, or
hexavalent chromium from cooling tower operations). In the event a claim is validly made
pursuant to this subsection (vii), CUSA shall only be liable for the cost of the work
provided that CUSA is provided the right to conduct the work, the exclusive right to
negotiate regulatory requirements pertaining to the government order and the necessary
access under the Easement Agreement to perform such work and CUSA’s obligations under this
subsection (vii) shall terminate if the Refinery Buyer discontinues refining operations on
the CUSA Properties or the use of the property affected by the government order is changed
to a use other than industrial.

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     (h) Certain Claims Regarding Prospective Employees. Except as otherwise provided in Section
3.2(f) or 11.1, Sellers shall indemnify, defend and hold each Buyer and its Affiliates (including
their respective directors, officers, employees and representatives) harmless from and against all
Losses attributable to (i) the Affected Employees’ (and any other employees’) employment or alleged
employment with Sellers or their Affiliates before the date any such employee becomes an employee
of any of the Buyers, (ii) the Remaining Employees’ employment with Sellers or their Affiliates and
any subsequent termination of employment from Sellers or their Affiliates and (iii) the application
of Sellers’ employee benefits plans to Affected Employees and Remaining Employees.

     (i) Aceituno Litigation. CUSA’s indemnity obligations under this Agreement shall not apply
with respect to Losses incurred by Refinery Buyer or its Affiliates in connection with (A) the
defense of the Aceituno Litigation (which litigation is more specifically described on Schedule
12 hereto) prior to, on or after the Closing or (B) the settlement agreement reached between
the Refinery Buyer and the Aceituno Litigation plaintiffs in or around June 2000.

3.2 Losses Indemnified by Buyers.

     (a) Buyer Breaches. Each Buyer shall indemnify, defend and hold harmless Sellers against any
Losses attributable to a breach of such Buyer’s representations and warranties under this
Agreement, provided that (i) any claim made pursuant to this Section 3.2(a) shall be void unless
notice of such claim is given to such Buyer within two (2) years after the Closing Date; (ii) the
Losses for any claim made under this Section 3.2(a) must individually exceed Two Hundred Fifty
Thousand Dollars ($250,000); and (iii) each Buyer’s liability for all Losses for all claims made
under this Section 3.2(a) shall not exceed Twenty Million Dollars ($20,000,000).

     (b) Claims Regarding Transferred Properties. Except to the extent of Sellers’ obligations
under Sections 3.1, 3.3(e), 9.4 and 9.5(e) herein, from and after the Closing Buyers shall, in
accordance with their respective interests, severally and not jointly, indemnify, defend and hold
harmless Sellers and their Affiliates (including their respective directors, officers, employees
and representatives) against all Losses including Asbestos or Silica Related Disease Losses, Buyers’ Remediation and other Environmental Losses that are attributable to the
ownership, operation, maintenance, improvement, use or closure of the Transferred Properties,
whether such Losses arise or such activities occur prior to, on or after the Closing Date. Buyers’
indemnity obligations under this Section 3.2(b) shall also include (i) all costs of investigating
and remediating impacts of a post-Closing release attributable to Buyers’ ownership, operation,
maintenance, improvement, use or closure of the Transferred Properties, the subsequently conveyed
CUSA-Retained Properties and/or the South Refinery (and, in the case of Free Product Recovery
Activities, in accordance with the allocation pursuant to Section 3.2(e)) and (ii) all fines,
penalties, costs, claims, judgments and demands arising out of Clean Air Act New Source Review
Enforcement Actions.

     (c) Claims Regarding Subsequently Conveyed CUSA-Retained Properties. Except to the extent of
Sellers’ obligations under Sections 3.1 and 3.3(e) herein, effective upon conveyance of title to
Refinery Buyer of all or a portion of the CUSA-Retained Properties, including any individual
Internal Solid Waste Management Unit Parcel or any remaining portion of the CUSA-Retained Option
Property, Refinery Buyer shall indemnify, defend and hold harmless Sellers and

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their Affiliates (including their respective directors, officers, employees and representatives) against all Losses,
including Asbestos or Silica Related Disease Losses, Buyers’ Remediation and other Environmental
Losses that are attributable to the ownership, operation, maintenance, improvement, use or closure,
whether prior to, on or after the Closing Date, of the particular property conveyed on such date;
provided, however, that CUSA shall remain responsible notwithstanding such conveyance for
performance of its obligations under Sections 9.4 and 9.5(e) with respect to a transferred Internal
Solid Waste Management Unit or Internal Solid Waste Management Unit Parcel. Buyers’ indemnity
obligations under this Section 3.2(c) shall also include (i) all costs of investigating and
remediating impacts of a post-Closing release attributable to Buyers’ ownership, operation,
maintenance, improvement, use or closure of the Transferred Properties, the subsequently conveyed
CUSA-Retained Properties and/or the South Refinery (and, in the case of Free Product Recovery
Activities, in accordance with the allocation pursuant to Section 3.2(e)) and (ii) all costs,
fines, penalties, claims, judgments and demands arising out of Clean Air Act New Source Review
Enforcement Actions.

     (d) South Refinery Claims. Except to the extent of the Sellers’ obligations under 3.1(f) and
3.3(e) herein, from and after the Closing, Refinery Buyer shall indemnify, defend and hold harmless
Sellers and their Affiliates (including their respective directors, officers, employees and
representatives) against all Losses, including Asbestos or Silica Related Disease Losses,
attributable to the ownership, operation, maintenance, improvement, use or closure of the South
Refinery, whether prior to, on or after the Closing Date, and including any claims made through
subrogation or otherwise pursuant to the South Refinery PLL Insurance Policy. In addition to the
foregoing, Refinery Buyer shall indemnify, defend and hold harmless Sellers and their Affiliates
(including their respective directors, officers, employees and representatives) against all costs,
fines, penalties, claims, judgments and demands arising out of Clean Air Act New Source Review
Enforcement Actions attributable to the ownership, operation, maintenance, improvement, use or
closure of the South Refinery, whether prior to, on or after the Closing Date, and including any
claims made through subrogation or otherwise pursuant to the South Refinery PLL Insurance Policy.
The indemnity in this section 3.2(d) does not apply to Losses related to historical releases of
Heavy Straight Run Gasoline present on the South Refinery, west of Tank 4117, prior to Closing;
provided, any such Losses are denied as not being covered pursuant to AIG Policy No. PLS-CCC 529 5413 (the “Policy”) issued by Commerce and Industry
Insurance Company, an Affiliate of American International Group, Inc. (“AIG”) and further provided
Refinery Buyer uses commercially reasonable efforts to pursue any denied Losses against AIG
requested by CUSA, and, further provided, the financial cost of pursuing any such losses against
AIG will be the sole responsibility of CUSA. In such event, CUSA shall have the right to select
legal counsel

     (e) Post-Closing Release Impacts.

(i) Post-Closing Release Impacts Within the Existing NAPL Plume.

     (A) If a release of any kind occurs after the Closing Date from either Buyers’
pipeline operations or operations on the properties constituting the Refinery Buyer
Properties as of the time of such release, and such release impacts in any respect
CUSA’ s Free Product Recovery Activities, then Refinery Buyer shall be responsible
for a portion of CUSA’ s costs associated with Free Product

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Recovery Activities (other than costs resulting from soil vapor extraction of soils that are not part of
the NAPL plume) in a proportion equal to the ratio of (1) the gallonage of
hydrocarbons released after Closing that migrates below the Bright Line and (2) the
number of gallons of recoverable hydrocarbons on the groundwater table at time of
the subject release. If CUSA and Refinery Buyer fail to agree on the volumes to be
used in the calculation of the ratio in this Section 3.2(e)(i)(A) within forty-five
(45) days following the subject release, either CUSA or Refinery Buyer may refer
such dispute to an independent expert appointed by Battelle. Such dispute will not
be subject to the dispute resolution provisions in Section 12.6 of this Agreement
and the resolution of the expert shall be final and binding on the Parties. If such
an expert cannot be appointed by Battelle, such dispute will be subject to the
dispute resolution provisions of Section 12.6 of this Agreement.

     (B) If, after such a release, a Government Authority requires soil vapor
extraction of soils (that are not part of the NAPL plume) below the Bright Line,
Refinery Buyer shall be responsible for a portion of CUSA’ s costs associated with
such soil vapor extraction in a proportion equal to the ratio of (1) the gallonage
of hydrocarbons released after Closing that migrates below the Bright Line and (2)
number of gallons of NAPL trapped below the Bright Line at time of the subject
release. If CUSA and Refinery Buyer fail to agree on the volumes to be used in the
calculation of the ratio in this Section 3.2(e)(i)(B) within forty-five (45) days
following the subject release, either CUSA or Refinery Buyer may refer such dispute
to an independent expert appointed by Battelle. Such dispute will not be subject to
the dispute resolution provisions in Section 12.6 of this Agreement and the
resolution of the expert shall be final and binding on the Parties. If such an
expert cannot be appointed by Battelle, such dispute will be subject to the dispute
resolution provisions of Section 12.6 of this Agreement.

     (C) Where all or a portion of such impacts are attributable to operations of
third-party pipeline operators conducting operations in the rights-of-way existing as of the Closing Date, rather than to Refinery Buyer, Refinery
Buyer shall be excused from responsibility under this Section 3.2(e) for that
portion of the costs that Refinery Buyer reasonably demonstrates to CUSA are
attributable to such third-party operators.

     (D) If a release of any kind (1) occurs after the Closing Date from either
Buyers’ pipeline operations or operations on the properties constituting the
Refinery Buyer Properties as of the time of such release, and (2) impacts conditions
below the Bright Line; and Seller has obtained concurrence from TCEQ that no further
active remediation activities are necessary to address conditions formerly addressed
through Free Product Recovery Activities, then Refinery Buyer shall be responsible
for the impact of such release.

     (ii) Post-Closing Release Impacts Beyond the Existing NAPL Product Plume. If there is
any release or any other action of Refinery Buyer or its Affiliates or their respective
contractors that occurs after the Closing Date from any operations on the

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Refinery Buyer Properties and such release or other action
precipitates an increase in the foot print of any sub-surface
contamination in any of the plumes delineated or described in
Schedule 14 attached to this Agreement,
Refinery Buyer shall be responsible for 100% of all costs
associated with investigating and/or remediating contamination associated with the increased
foot print, minus that portion of the costs demonstrated to be the responsibility of
third-party pipeline operators, if any.

     (iii) Post Closing Release Insurance. Refinery Buyer shall cause Sellers to be named
as additional insureds on any policies of environmental impairment liability, pollution
liability limitation, accidental release or commercial general liability insurance that
Refinery Buyer carries from time to time covering releases of Hazardous Materials from any
of the Refinery Buyer Properties, the coverage amount of which shall not be less than
$2,000,000 per occurrence (or the minimum amount required of Refinery Buyer under any
applicable financing agreements, if greater), and shall cause any such policy of insurance
to include contractual liability coverage covering Refinery Buyer’s obligations under this
Section 3.2. In the event an insurer demands an additional premium for naming Sellers on any
such policy, Refinery Buyer and Sellers shall promptly meet to determine whether Sellers
will share the costs of the additional premium. If in the event Sellers are unwilling to
share in the costs of the additional premium, Refinery Buyer may proceed with the
acquisition of the policy so long as the policy contains a waiver of subrogation of all
claims against Sellers and their respective Affiliates involving matters that are the
subject of this Agreement. Refinery Buyer’s obligations under this Section 3.2(e)(iii) shall
expire ten (10) years after Closing.

     (f) Certain Claims Regarding Prospective Employees. Except as otherwise provided in Article
11, Buyers shall, in accordance with their respective interests, severally and not jointly,
indemnify, defend and hold Sellers and their Affiliates harmless from and against all Losses
attributable to (i) the Affected Employees’ employment or alleged employment with any of the Buyers
arising on or after the effective date of such affected Employees’ employment or alleged employment
with any of the Buyers, (ii) Buyers’ employee selection and offer process and actions taken by any
of the Buyers relating to employees or former employees of Sellers or their
Affiliates (including Prospective Employees and Affected Employees) whether prior to, on or
after the Closing Date, (iii) Buyers’ use of employee records or other records maintained by
Sellers or their Affiliates that have been provided to Buyers, and (iv) the actions of any
employees of Sellers or their Affiliates (including the Prospective Employees), or employees,
representatives or contractors of Buyers or their Affiliates, acting on any of the Buyer’s behalf
and at any of the Buyer’s direction in connection with Buyers’ employee selection and offer
process.

3.3 General Liability Provisions.

     (a) The indemnification obligations in this Article 3 and elsewhere in this Agreement unless
otherwise expressly stated, apply even in the event of the active, passive or concurrent
negligence, liability without fault or strict liability of any indemnified Person (but not to the
extent of any intentional misconduct by an indemnified Person), and shall apply and remain in force
notwithstanding the performance or nonperformance of any covenant or the truthfulness or accuracy
of any representation or warranty contained in this Agreement or otherwise.

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     (b) For purposes of allocating liability between Sellers and Buyers under the indemnity
provisions of this Agreement, (i) Losses shall be deemed to be attributable to ownership,
operation, maintenance, improvement, use or closure as of the time that an injury or alleged injury
is suffered by a Person and not as of the time a claim or legal action is filed, and (ii) Losses
relating to the failure of or release from an improvement, fixture or item of equipment shall be
deemed to have occurred as of the time that the failure or release occurs and not as of the time
that an allegedly deficient condition or maintenance act or omission occurs.

     (c) Nothing in this Agreement amends or modifies the Parties’ rights and obligations under the
December 2002 Settlement Agreement.

     (d) Notwithstanding Sections 3.1 and 3.2, indemnification for Losses attributable to personal
injury, death or damage to personal property resulting directly from the access of a Party or its
employees or contractors on the property of another Party for the performance of activities
permitted under the Easement Agreement or the Connection Agreements shall be governed exclusively
by the Easement Agreement or the Connection Agreements respectively.

     (e) With respect to Asbestos or Silica Related Disease Losses, a claim that qualifies for
coverage under Sections 3.1(d)(iii), 3.1(e)(iii), 3.1(f)(iii) or 3.1(g)(iii) within seven (7) years
following the Closing Date shall not be void to the extent it relates to an employee of Buyers or
their Affiliates who worked after the Closing Date at either the Refinery Buyer Properties or the
CPL Properties, provided that (i) such person also was an employee of Seller Indemnitor or its
Affiliates at either the Refinery Buyer Properties or the CPL Properties prior to the Closing Date;
(ii) the Seller Indemnitor shall only be responsible for a percentage of the Losses associated with
such claim, which percentage is calculated based on the year following the Closing Date in which
the claim is made as follows: 87.5% in year one, 75% in year two, 62.5% in year three, 50% in year
four, 37.5% in year five, 25% in year six and 12.5% in year seven; and (iii) Buyers, under Section
3.2, shall be responsible for the remaining percentage of any claim allowed under
this Section 3.3(e). Notwithstanding any provision in this Agreement to the contrary; Sellers
shall remain liable for Asbestos or Silica Related Disease Losses associated with any Designated
Employee (as such term is defined in the Loaned Employee Agreement attached hereto as Exhibit S)
who works at either the Refinery Buyer Properties or the CPL Properties following the Closing Date
pursuant to the Loaned Employee Agreement. The Parties shall use their reasonable efforts to
cooperate to keep claims for Asbestos or Silica Related Disease Losses within the workers’
compensation system. Notwithstanding anything to the contrary in Section 3.5, no Indemnitee shall
be entitled to recover for Asbestos or Silica Related Disease Losses under this Agreement to the
extent such Losses are covered by any third party insurance whether carried by the Indemnitee or
others.

3.4 Indemnification and Defense Procedures. Upon any Indemnitee becoming aware of anything which
is or may give rise to a claim for indemnification or grounds for making a claim under any of the
indemnities under this Agreement or of any claim, action or demand against it or matter likely to
give rise to any of these in respect of the indemnities, the Indemnitee shall:

     (a) notify the Indemnitor by written notice as soon as reasonably practicable after it appears
to the Indemnitee that any assessment or claim, action or demand of a third party

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received by or
coming to the notice of the Indemnitee may result in a claim under the indemnities, specifying all
material relevant details as are then available to the Indemnitee;

     (b) take such action and give such information and access to personnel, premises, property,
documents and records to the Indemnitor and its professional advisers as the Indemnitor may
reasonably request and the Indemnitor shall be entitled to require the Indemnitee to take such
action and give such information and assistance in order to avoid, dispute, resist, mitigate,
settle, compromise, defend or appeal any claim in respect thereof or adjudication with respect
thereto, subject to the Indemnitor indemnifying the Indemnitee against all reasonable costs and
expenses incurred by the Indemnitee in complying with any such request or requirement;

     (c) at the request of the Indemnitor, allow the indemnitor to take the sole conduct of such
actions as the Indemnitor may deem appropriate in connection with any such assessment or claim in
the name of the Indemnitee, subject to the Indemnitor’s indemnifying “the Indemnitee against any
increase in liability, costs, damages or expenses (excluding any consequential or indirect
liabilities, losses, costs, damages or expenses) which it may incur as a result of the manner in
which the Indemnitor conducts such actions, and in that connection the Indemnitee shall give or
cause to be given to the Indemnitor all such assistance as the Indemnitor may reasonably require in
avoiding, disputing, resisting, settling, compromising, defending or appealing any such claim and
shall instruct such attorneys or other professional advisors as the Indemnitor may nominate to act
on behalf of the Indemnitee, as appropriate, but to act in accordance with the Indemnitor’s sole
instructions, subject to the Indemnitor’s indemnifying the Indemnitee against all costs and
expenses incurred by the Indemnitee in complying with any such requirement; and

     (d) make no admission of liability, agreement, settlement or compromise with any third party
in relation to any such claim or adjudication without the prior written consent of the Indemnitor.

Except in the case of claims for Asbestos or Silica Related Disease Losses; in the event that a
claim is within the scope of the indemnities of two or more Indemnitors, each Indemnitor shall be
responsible for the indemnity and defense and shall bear the costs of indemnity and defense to the
extent of the coverage of its indemnity. With respect to claims for Asbestos or Silica Related
Disease Losses, in the event that such a claim that qualifies for coverage under this Agreement is
within the scope of the indemnities of two or more Indemnitors, each Indemnitor shall be
responsible for the indemnity and shall bear the costs of indemnity and defense to the extent of
the coverage of its indemnity; provided, that the Indemnitor responsible under Section 33(e)(ii)
for greater than fifty percent (50%) of the Losses associated with a claim shall have the option,
on notice to the other parties, to be solely responsible for the defense of such claim in
accordance with Section 3.4, although each Indemnitor shall continue to bear the costs of such
defense to the extent of the coverage of its indemnity. If an Indemnitor does not exercise its
option to be solely responsible for the defense of such claims, each Indemnitor shall be
responsible for the defense and shall bear the costs of defense to the extent of the coverage of
its indemnity.

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3.5 No Liability if Loss is Otherwise Compensated For.

     (a) No Indemnitee shall be entitled to recover damages or otherwise obtain reimbursement or
restitution more than once in respect of the same loss or damage.

     (b) The Indemnitor shall not be liable to the extent that the subject of the claim has been or
is made good without cost to an Indemnitee.

     (c) In calculating the liability of the Indemnitor there shall be taken into account the
amount by which any Tax, tax based on or measured by net income or profits, or assessment for which
an Indemnitee is now or in the future accountable or liable to be assessed is reduced or
extinguished as a result of the matter giving rise to such liability.

     (d) If in respect of any matter which would give rise to a claim for indemnity, an Indemnitee
is entitled to claim under any policy of insurance carried by a party other than the Indemnitees
(e.g., a policy carried by a contractor of an Indemnitee that names an Indemnitee as an additional
insured), then no such matter shall be the subject of a claim unless and until such Indemnitee
shall have made a claim against such insurers, and any such amount claimed against the Indemnitor
shall be reduced by the amount recovered.

     (e) Recovery From Third Parties.

     (i) Where an Indemnitee is entitled to recover from another Person (other than the
other Indemnitees or an insurer under a policy carried by the Indemnitees) any sum in
respect of any matter giving rise to a claim such Indemnitee shall undertake all reasonable
steps for a period of six (6) months to enforce such recovery prior to taking action against
the Indemnitor (other than to notify the Indemnitor of the claim against it)
and, in the event that such Indemnitee shall recover any amount from such other Person,
the amount of the claim against the Indemnitor shall be reduced by the amount recovered (net
of expenses). At the expiration of such six-month period, the provisions of Section
3.5(e)(ii) below shall apply. The three-year limitations on the time for Buyers to make
claims under the indemnities contained in Sections 31(d), 3.1(e) and 3.1(g) shall be tolled
to the extent that such six-month period exceeds the expiration date of any such limitation.

     (ii) If the Indemnitor pays at any time to an Indemnitee an amount pursuant to a claim
in respect of the indemnities and such Indemnitee subsequently becomes entitled, or has
commenced taking steps under Section 3.5(e)(i) above to recover from another Person (other
than the other Indemnitees) any sum in respect of any matter giving rise to such claim, such
Indemnitee shall take all reasonable steps to enforce such recovery, and shall forthwith
upon the recovery of the same repay to the Indemnitor so much of the amount paid by the
Indemnitor to the Indemnitees as does not exceed the sum recovered from such other Person
(net of expenses).

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ARTICLE 4

DEPOSIT AND PURCHASE PRICE

4.1 Deposit. On the Execution Date, Buyers shall deliver to Sellers a deposit of Four Million
Dollars ($4,000,000) (the “Deposit”). The Deposit shall be made in Dollars by transfer of
immediately available funds to Sellers’ Bank Account. Sellers need not segregate the Deposit and
shall not hold the Deposit in trust. If the Closing occurs, the principal amount of the Deposit
shall be credited against the Purchase Price, and interest thereon at the Prime Rate shall be
credited in the Settlement Statement defined below. If the Closing does not occur, the Deposit and
interest thereon at the Prime Rate shall be applied pursuant to Section 5.4 below.

4.2 Purchase Price. As consideration for the sale of the Transferred Properties and Sellers’ other
obligations hereunder, Buyers shall transfer the following amounts (collectively the “Purchase
Price”) subject to adjustment as set forth in Section 4.3 below:

     (i) the Deposit shall be paid to Sellers in accordance with Section 4.1 above on the
Execution Date;

     (ii) the sum of Thirty-Six Million Dollars ($36,000,000) shall be paid by Buyers to
Sellers on the Closing Date; and

     (iii) an amount which shall be the Sellers’ good faith estimate of the Transferred
Working Capital, which estimate shall be made by Sellers and reviewed with Buyers on the
date that is no later than fifteen (15) days prior to the Closing Date and shall be paid by
Buyers to Sellers on the Closing Date.

All amounts owed to Sellers shall be paid in Dollars by wire transfer of immediately available
funds to Sellers’ Bank Account.

4.3 Purchase Price Adjustments. The Purchase Price shall be subject to adjustment following the
Closing Date pursuant to the procedure set forth in. Section 4.4 to reflect the actual value as of
the Closing Date of the following items of Transferred Working Capital:

     (i) Measured Inventories. The difference between the value of the Measured Inventories
calculated in accordance with Schedule 11 and the Transferred Working Capital
estimate set forth in Section 4.2(iii), shall be credited to Sellers or the Buyers as
applicable.

     (ii) Cash, Deposits and Cash Equivalents, and Prepayments. Any cash, deposits and
other cash equivalents associated with the Transferred Properties which were provided by
Sellers on or before the Closing Date but which were not released by Buyers pursuant to
Section 8.6 below, and any prepayment of Tax or other obligations by Sellers on or before
the Closing Date with respect to periods after the Closing Date, shall be credited to
Sellers. All accounts receivable generated from performance under the Applicable Contracts
on or before the Closing Date shall be retained by Sellers.

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     (iii) Deferred Payments. All deferred or otherwise outstanding payment obligations
associated with the Transferred Properties which relate to liabilities that have been
incurred on or prior to the Closing Date that have been assumed by Buyers or for which
Buyers are otherwise responsible shall be credited to Buyers. All accounts payable under the
Applicable Contracts with respect to periods on or before the Closing Date shall be retained
by Sellers.

     (iv) Unpaid Invoices Under Operating Agreement. The outstanding amounts of CUSA’s
receivables under invoices issued by CUSA pursuant to the Operating Agreement shall be paid
to Sellers prior to Closing.

     (v) Other Prorations. All prepayments, rents, current Taxes, salaries, assessments,
utilities, maintenance charges and similar expenses associated with the Transferred
Properties shall be prorated between Sellers and Buyers as of the Closing Date. To the
extent such proration has not been effected by other means and to the extent of information
then available, such proration shall be reflected in the Settlement Statement.

In addition to such elements of Transferred Working Capital, interest on the Deposit from the date
of payment through the Closing Date at the Prime Rate shall be credited to Buyers as part of the
Settlement Statement.

4.4 Settlement Statement. A preliminary estimate of the amounts set forth in Section 4.3 above
shall be calculated by Sellers and set forth in a settlement estimate (the “Settlement Estimate”)
delivered to Buyers not
later than five (5) Business Days prior to the scheduled date for Closing. A final determination of
the adjustments under Section 4.3 (the “Adjustment Amount”) shall be calculated by Sellers and set
forth in a settlement statement (the “Settlement Statement”) delivered to Buyers not later than 90
calendar days after the Closing. The Settlement Statement shall contain information detailing the
basis for Sellers’ calculations, and Buyers and their representatives shall have access to such
records of Sellers as may be reasonably requested for verifying the measurements and calculations.
If any Buyer gives to Sellers written notice of dispute of any element of the Settlement Statement
within fifteen (15) calendar days after receiving the Settlement Statement, (i) Sellers or Buyers,
as the case may be, shall pay all undisputed portions of the Adjustment Amount, with interest at
the Prime Rate from the Closing Date, to the other Party not later than fifteen (15) calendar days
after receiving the Settlement Statement, and (ii) the disputed amount shall be negotiated between
Sellers and Buyers. If such negotiations do not result in a resolution of the dispute within
fifteen (15) calendar days after any Buyer’s notice of dispute, the disputed amount shall be
determined by one partner designated by the Houston, Texas office of Deloitte & Touche, whose
determination shall be consistent with the provisions of this Agreement and shall be final and
conclusive. The disputed amount shall be payable by the parties owing such amount within three (3)
Business Days following resolution or determination of the dispute with interest from the Closing
Date at the Prime Rate. Any Adjustment Amount owing under the Settlement Statement not paid within
the applicable time period set forth above shall bear interest at the Default Interest Rate from
the date such Adjustment Amount became due until paid.

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4.5 Allocation of f Purchase Price. The Purchase Price shall be allocated among the Transferred
Properties in a manner mutually agreed upon prior to Closing by Sellers and Buyers, as set forth on
Schedule 20 (the “Allocation”). Sellers and Buyers shall use the Allocation for all
reporting purposes having to do with federal, state and local income and franchise taxes. Sellers
and Buyers will timely file any forms and information reports required to be filed under Section
1060 of the Code (including IRS Form 8594) and any corresponding provision of state or local tax
law. In addition, Sellers and Buyers each agree (i) to file all Tax Returns and determine all Taxes
and taxes based on or measured by net income or profits (including, without limitation, for
purposes of Section 1060 of the Code) in accordance with and based upon the Allocation and (ii) not
to take any position inconsistent with such Allocation in any audit or judicial or administrative
proceeding or otherwise.

ARTICLE 5

CLOSING

5.1 Time and Place of Closing. The consummation of the sale of the Transferred Properties
contemplated by this Agreement (the “Closing”) shall be deemed to have occurred at 11:59 p.m. El
Paso time on the Closing Date. The meeting at which execution or delivery of Closing documents and
confirmation of transfer of funds shall take place at the offices of Pillsbury Winthrop LLP in San
Francisco, California at 9:00 a.m. California time on the Closing Date (or, if the Closing Date
does not
occur on a Business Day, on the Business Day immediately preceding the Closing Date), or such other
location, date or time as Sellers and Buyers may mutually agree in writing.

5.2 Scheduled Closing Date. The transfer of funds and the delivery of documents required under
this Agreement to be made on the Closing Date is scheduled to occur on June 30, 2003.
Alternatively, Sellers and Buyers may mutually agree to schedule the Closing Date on a different
date.

5.3 Termination. If the Closing has not occurred on or before (i) August 31, 2003 or (ii) any
later Closing Date established by mutual agreement, either Sellers (acting collectively) or Buyers
(acting collectively), by written notice to the other, may elect to terminate their respective
obligations to close the transactions contemplated by this Agreement; provided that no Party may so
terminate its obligations if it is then in default of any of its obligations under this Agreement.

5.4 Consequences of Termination.

     (a) No termination of this Agreement shall relieve any Party hereto of any liability for any
breach hereof occurring prior to such termination.

     (b) If the Closing does not occur because of a breach of Buyers’ obligations and this
Agreement is terminated as contemplated herein, Sellers shall retain from the Deposit an amount
equal to the reasonable expenses incurred by Sellers in connection with this Agreement, including
internal expenses and value of employee time, not to exceed One Million Five Hundred Thousand
Dollars ($1,500,000) as liquidated damages for the failure to close. Refinery Buyer shall be
entitled to the immediate return of the remaining principal amount of the Deposit

31

 

and any interest
thereon at the Prime Rate. In such event, the recovery of such expenses shall be Sellers’ sole
remedy against Buyers arising out of this Agreement or the termination hereof.

     (c) If the Closing does not occur because of a breach of Sellers’ obligations and this
Agreement is terminated as contemplated herein, Refinery Buyer shall be entitled to the immediate
return of the principal amount of the Deposit and any interest thereon at the Prime Rate and Buyers
shall be entitled to reimbursement by Sellers of the reasonable expenses incurred by Buyers in
connection with this Agreement, including internal expenses and value of employee time, not to
exceed One Million Five Hundred Thousand Dollars ($1,500,000) as liquidated damages for the failure
to close. In such event, the recovery of such Deposit and payment by Sellers of such additional
reimbursement shall be Buyers’ sole remedy against Sellers arising out of this Agreement or the
termination hereof

     (d) If the Closing does not occur for reasons other than as set forth in (b) and (c) of this
Section 5.4 and this Agreement is terminated as contemplated herein, Sellers shall return the
principal amount of the Deposit and interest thereon at the Prime Rate, each Party will otherwise
be responsible for its own expenses incurred in connection with this Agreement, and no Party
shall have any remedy against the other Parties arising out of this Agreement or the
termination hereof.

     (e) By initialing where indicated below, the parties specifically agree to this liquidated
damages provision.

CUSA
___CPL ___ REFINERY BUYER ___ PIPELINE BUYER ___

ARTICLE 6

CLOSING CONDITIONS PRECEDENT

6.1 Sellers’ Closing Conditions Precedent. The obligations of Sellers to be performed by them at
the Closing shall be subject to the satisfaction, at or prior to the Closing, of each of the
following conditions, each of which may be waived by Sellers (acting collectively) except as
otherwise prohibited by Law:

     (a) Payments. Buyers shall make the payments required to be made on or before the Closing
Date, in accordance with Article 4 and Article 10.

     (b) Accuracy and Performance of Buyers’ Representations and Covenants. The representations
and warranties of Buyers contained in this Agreement shall be true and correct in all material
respects both as of the Execution Date and as of the Closing Date as if made on and as of the
Closing Date, except for changes permitted or contemplated by this Agreement or otherwise consented
to by Sellers in writing. Each of the covenants of Buyers required by this Agreement to be
performed and complied with at or prior to the Closing shall have been duly performed and validly
complied with at or prior to the Closing. Sellers shall have received a certificate executed by an
officer of each Buyer certifying the substance of this clause (b).

     (c) Authorization of Buyers. All corporate, limited partnership, or other legal entity as
applicable, action necessary to authorize the execution, delivery and performance of this

32

 

Agreement
and the consummation of the transactions contemplated hereby shall have been duly taken by Buyers.

     (d) Opinion of Buyers’ Counsel. Sellers shall have received an opinion of Larson King, LLP,
legal counsel for Buyers, in the form of Exhibit F attached to this Agreement.

     (e) Absence of Restraining Litigation. No action or proceeding by or before any Government
Authority shall have been instituted or threatened (and not subsequently dismissed, settled or
otherwise terminated) which might prohibit, invalidate or materially restrain the transactions
contemplated by this Agreement, other than an action or proceeding instituted or threatened by
Sellers or any of their Affiliates.

     (f) Deeds for Easements and Assignment and Assumption Agreements. Buyers shall have executed
and delivered to Sellers the deeds for easements and the assignment and assumption agreements with
respect to the transfer of rights-of-way and other easements and leases and contract rights in the
forms described in Section 2.5 above.

     (g) Required Consents. Subject to the provisions of Section 8.5, any required waiting periods
under the HSR Act shall have expired; all notice and consent requirements shall have been satisfied
for assignment of the Applicable Contracts identified as “Essential Contracts” in Schedules 4
and 8; and all notice, consent or other regulatory action requirements shall have been
satisfied for transfer of the Applicable Permits identified as “Essential Permits” in Schedules
5 and 9.

     (h) Transition Services Agreement. Buyers shall have executed and delivered to Sellers the
Transition Services Agreement in the form of Exhibit I attached to this Agreement.

     (i) Right of First Refusal Agreement — Southwest Asphalt Business. Refinery Buyer shall have
executed, acknowledged and delivered to CUSA the Right of First Refusal Agreement — Southwest
Asphalt Business in the form of Exhibit J attached to this Agreement.

     (j) Right of First Refusal Agreement — Crude Pipelines. Pipeline Buyer shall have executed,
acknowledged and delivered to CPL the Right of First Refusal Agreement — Crude Pipelines in the
form of Exhibit K attached to this Agreement.

     (k) Option Agreement. Refinery Buyer shall have executed, acknowledged and delivered to CUSA
the Option Agreement in the form of Exhibit L attached to this Agreement.

     (l) Product Sales Agreement. Refinery Buyer shall have executed and delivered to CUSA the
Product Sales Agreement in the form of Exhibit M attached to this Agreement.

     (m) Residuum Supply Agreement. Refinery Buyer shall have executed and delivered to CUSA the
Residuum Supply Agreement in the form of Exhibit N attached to this Agreement.

     (n) Operational Services Agreement. Buyers shall have executed and delivered to Sellers the
Operational Services Agreement in the form of Exhibit O attached to this Agreement.

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     (o) Termination of Operating Agreement. Refinery Buyer shall have executed and delivered to
CUSA the Termination of Operating Agreement in the form of Exhibit P attached to this
Agreement.

     (p) Connection Agreements. Pipeline Buyer shall have executed and delivered to CPL the
Connection Agreements in the form of Exhibits R-1 and R-2 attached to this Agreement.

     (q) Loaned Employee Agreement. Buyers shall have executed and delivered to CUSA the Loaned
Employee Agreement in the form of Exhibit S attached to this Agreement.

     (r) Remediation Hydrocarbon Sales Agreement. Refinery Buyer shall have executed and delivered
to CUSA the Remediation Hydrocarbon Sales Agreement in the form of Exhibit T attached to
this Agreement for sale of recovered products from CUSA to Refinery Buyer.

     (s) Technology Agreement. Buyers shall have executed and delivered to Sellers the Technology
Agreement in the form of Exhibit U attached to this Agreement.

     (t) Rotor Use Agreement. Refinery Buyer shall have executed and delivered to CUSA the Rotor
Use Agreement in the form of Exhibit V attached to this Agreement, pursuant to which CUSA
will provide access to and use of certain rotors listed on Schedule 13 hereto to the Buyers
for two years from the Closing Date pursuant to the terms thereof.

     (u) Buyer Guaranty and Undertaking Letters. Buyers shall have caused to be executed and
delivered to Sellers, by the relevant parties, the following: (i) a Guaranty Agreement in the form
of Exhibit W attached to this Agreement; (ii) a Foster Undertaking Letter in the form of
Exhibit X-1 attached to this Agreement; (iii) a Refinery Trust Undertaking Letter in the
form of Exhibit X-2 attached to this Agreement; and (iv) a Pipeline Trust Undertaking
Letter in the form of Exhibit X-3 attached to this Agreement.

     (v) Replacement or Provision of Security. Buyers shall have caused to be delivered to Sellers
evidence that (i) Buyers have caused to be released and returned to Sellers any bonds or other
security provided by any Sellers or any of their Affiliates to Government Authorities or other
third parties in connection with the Transferred Properties as described in Schedule 18
attached to this Agreement, (ii) Buyers have arranged for substitute security for any commitments
which are canceled or terminated pursuant to Section 8.6; and (iii) Buyers have caused to be
furnished any insurance, bonds or other security required in connection with the ownership,
operation, maintenance, improvement, use or closure of the Transferred Properties on and after the
Closing Date.

     (w) Success Sharing Agreement. Buyers shall have caused to be executed and delivered to
Sellers a letter agreement regarding Sellers’ bonus program in the form of Exhibit Y
attached to this Agreement.

6.2 Buyers’ Closing Conditions Precedent. The obligations of Buyers to be performed by them at the
Closing shall be subject to the satisfaction, at or prior to the Closing, of the following
conditions precedent, each of which may be waived by Buyers (acting collectively) except as
otherwise prohibited by Law:

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     (a) Delivery of Conveyancing Instruments. Sellers shall have executed, acknowledged where
applicable, and delivered to Buyers the conveyancing instruments defined in Section 2.5 above.

     (b) Accuracy and Performance of Sellers’ Representations and Covenants. The representations
and warranties of Sellers contained in this Agreement shall be true and correct in all material
respects both as of the Execution Date and as of the Closing Date as if made on and as of the
Closing Date, except for changes permitted or contemplated by this Agreement or otherwise consented
to by Buyer in writing. Each of the covenants of Sellers required by this Agreement to be performed
and complied with at or prior to the Closing shall have been duly performed and validly complied
with at or prior to the Closing. Buyers shall have received a certificate executed by an officer of
each of CUSA and of CPL certifying the substance of this clause (b).

     (c) Authorization of Sellers. All corporate approvals necessary to authorize the execution,
delivery and performance of this Agreement and the consummation of the transactions contemplated
hereby shall have been duly taken by Sellers.

     (d) Opinion of Sellers’ Counsel. Buyers shall have received an opinion of Pillsbury Winthrop
LLP, legal counsel for Sellers, in the form of Exhibit G attached to this Agreement.

     (e) Absence of Restraining Litigation. No action or proceeding by or before any Government
Authority shall have been instituted or threatened (and not subsequently dismissed, settled or
otherwise terminated) which might prohibit, invalidate or materially restrain the transactions
contemplated by this Agreement, other than an action or proceeding instituted or threatened by
Buyers.

     (f) Required Consents. Subject to the provisions of Section 8.5, any required waiting periods
under the HSR Act shall have expired; all notice and consent requirements shall have been satisfied
for assignment of the Applicable Contracts identified as “Essential Contracts” in Schedules 4
and 8; and all notice, consent or other regulatory action requirements shall have been
satisfied for transfer of the Applicable Permits identified as “Essential Permits” in Schedules
5 and 9.

     (g) Affidavits of Sellers’ Non Foreign Status. Buyers shall have received affidavits of
non-foreign status of each of CUSA and CPL in the form of Exhibits H-1 and H-2 attached to
this Agreement.

     (h) Transition Services Agreement. Sellers shall have executed and delivered to Buyers the
Transition Services Agreement in the form of Exhibit I attached to this Agreement.

     (i) Right of First Refusal Agreement — Southwest Asphalt Business. CUSA shall have executed,
acknowledged and delivered to Refinery Buyer the Right of First Refusal Agreement — Southwest
Asphalt Business in the form of Exhibit J attached to this Agreement.

     (j) Right of First Refusal Agreement — Crude Pipelines. CPL shall have executed, acknowledged
and delivered to Pipeline Buyer the Right of First Refusal Agreement — Crude Pipelines in the form
of Exhibit K attached to this Agreement.

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     (k) Option Agreement. CUSA shall have executed, acknowledged and delivered to Refinery Buyer
the Option Agreement in the form of Exhibit L attached to this Agreement.

     (l) Product Sales Agreement. CUSA shall have executed and delivered to Refinery Buyer the
Product Sales Agreement in the form of Exhibit M attached to this Agreement.

     (m) Residuum Supply Agreement. CUSA shall have executed and delivered to Refinery Buyer the
Residuum Supply Agreement in the form of Exhibit N attached to this Agreement.

     (n) Operational Services Agreement. Sellers shall have executed and delivered to Buyers the
Operational Services Agreement in the form of Exhibit O attached to this Agreement.

     (o) Termination of Operating Agreement. CUSA shall have executed and delivered to Refinery
Buyer the Termination of Operating Agreement in the form of Exhibit P attached to this
Agreement.

     (p) Product Pipeline Shipment Notifications. CUSA shall have executed and delivered to SFPP,
L.P. and to CPL the notifications in the form of Exhibit Q attached to this Agreement
notifying such companies of the transfer of the Transferred Properties and requiring that Buyers
have the benefit under applicable tariffs, contracts and Laws of certain portions of CUSA’s
shipment history on certain products pipelines.

     (q) Connection Agreements. CPL shall have executed and delivered to Pipeline Buyer the
Connection Agreements in the form of Exhibits R-1 and R-2 attached to this Agreement.

     (r) Loaned Employee Agreement. CUSA shall have executed and delivered to Buyers the Loaned
Employee Agreement in the form of Exhibit S attached to this Agreement.

     (s) Remediation Hydrocarbon Sales Agreement. CUSA shall have executed and delivered to
Refinery Buyer the Remediation Hydrocarbon Sales Agreement in the form of Exhibit T
attached to this Agreement for sale of recovered products from CUSA to Refinery Buyer.

     (t) Technology Agreement. Sellers shall have executed and delivered to Buyers the Technology
Agreement in the form of Exhibit U attached to this Agreement.

     (u) Rotor Use Agreement. CUSA shall have executed and delivered to Refinery Buyer the Rotor
Use Agreement in the form of Exhibit V attached to this Agreement, pursuant to which CUSA
will provide access to and use of the certain rotors listed on Schedule 13 hereto to the
Buyers for two years from the Closing Date pursuant to the terms thereof.

     (v) Title Insurance Policy. Lone Star Title Company (the “Title Company”) or another title
company reasonably satisfactory to Buyers shall be prepared to issue to Refinery Buyer at Buyers’
expense on the Closing Date an owner’s policy or policies of title insurance (or binding
commitments to issue and deliver such policy or policies promptly after the Closing), for the CUSA
Real Property, dated the Closing Date, in the minimum sum of $125,000,000.

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     (w) Survey. Buyers shall have received at Sellers’ expense a survey of the boundaries of the
CUSA and CPL Real Property performed by a Registered Professional Land Surveyor who is acceptable
to the Title Company and any lender of Buyers.

     (x) Success Sharing Agreement. Sellers shall have caused to be executed and delivered to
Buyers a letter agreement regarding Sellers’ bonus program in the form of Exhibit Y
attached to this Agreement.

ARTICLE 7

REPRESENTATIONS AND WARRANTIES

7.1 CUSA’s Representations and Warranties. CUSA represents and warrants the following to each Buyer
as of the Execution Date. As used herein, “to the knowledge of CUSA’s designated personnel” means
to the actual knowledge of the CUSA personnel having authority and responsibility for the CUSA
Properties that are listed in Schedule 17 attached to this Agreement.

     (a) Due Incorporation. CUSA is a corporation duly organized, validly existing and in good
standing under the Laws of the Commonwealth of Pennsylvania. CUSA has all requisite corporate power
and authority to own, lease and operate its properties and to carry on its business as now being
conducted. CUSA is in good standing as a foreign corporation authorized to transact intrastate
business in the State of Texas.

     (b) Due Authorization and Enforceability. CUSA has full power and authority to enter into
this Agreement and the instruments and agreements hereunder and to consummate the transactions
contemplated hereby and thereby. The execution, delivery and performance of this Agreement and the
instruments and agreements hereunder have been duly approved, and no other corporate proceedings on
the part of CUSA are necessary to authorize this Agreement, the instruments and agreements
hereunder or the transactions contemplated hereby and thereby. This Agreement and the instruments
and agreements hereunder have been duly and validly executed and delivered by CUSA and are
enforceable against CUSA in accordance with their respective terms, except as such enforceability
may be limited by applicable bankruptcy, insolvency, moratorium, reorganization or similar laws
from time to time in effect which affect creditors’ rights generally and by legal and equitable
limitations on the availability of specific remedies.

     (c) Defaults. To the knowledge of CUSA’s designated personnel and except as disclosed to
Buyers in the Disclosure Letter, the CUSA Applicable Contracts are in full force and effect; there
are no defaults by CUSA, or events that with notice or the lapse of time, or both, would constitute
a default by CUSA under the CUSA Applicable Contracts or any other party thereto; and CUSA has not
received any notice that any party to any of the CUSA Applicable Contracts intends to terminate
such agreement.

     (d) Notices of Violation. To the knowledge of CUSA’s designated personnel and except as
disclosed to Buyers in the Disclosure Letter, CUSA has not received between January 1, 1998 and the
date hereof notice from any Government Authority claiming violation of any Law (including any
building, zoning or other ordinance) or CUSA Applicable Permits or

37

 

requiring any substantial work,
construction or expenditure, or asserting any Tax penalty, with respect to the CUSA Properties.

     (e) Compliance with Laws and Permits. Except as disclosed to Buyers in this Agreement or in
the Disclosure Letter, to the knowledge of CUSA’s designated personnel, and except for
noncompliance matters as to which a fine or other penalty would not be applicable, (i) the CUSA
Applicable Permits constitute the permits, licenses and other approvals currently
utilized by CUSA in its operation of the CUSA Properties; (ii) each of the CUSA Applicable
Permits is valid and subsisting, in full force and effect, and enforceable by CUSA, (iii) upon the
Closing each of the Essential Permits of CUSA as defined in Section 6.1(g) above transferred to
Buyers by Closing will be in full force and effect without any further consent, approval or other
action of any Government Authority or third party; (iv) none of the CUSA Applicable Permits have
been, or is currently threatened to be, revoked, canceled, suspended or modified; and (v) the CUSA
Properties and, to the extent of CUSA’s responsibilities under the Operating Agreement, the South
Refinery are currently being operated in compliance with applicable regulatory requirements and
Applicable Permits.

     (f) Litigation. Except as disclosed to Buyers in the Disclosure Letter, there are no actions,
suits or other litigation, proceedings or governmental investigations (including claims of
employment discrimination and intellectual property infringement) pending or, to the knowledge of
CUSA’s designated personnel, threatened by, against or affecting CUSA, or any of its officers,
directors, employees or the stockholders thereof in their capacity as such, or any of the
properties or businesses of CUSA, arising out of CUSA’s ownership or operation of the Transferred
Properties, or which in any manner challenge or seek to prevent, enjoin, alter or delay the
transactions contemplated hereby, and to the knowledge of CUSA’s designated personnel there are no
facts or circumstances which may give rise to any of the foregoing. Except as disclosed to Buyers
in the Disclosure Letter and except for the Applicable Permits, CUSA is not subject to any order,
judgment, decree, stipulation or consent order of or with any court or other Government Authority
which has or could have a material adverse effect on the CUSA Transferred Properties.

     (g) Inclusion of Properties. Except for the items specifically excluded in Section 2.4 and
Schedule 13, the Transferred Properties include all the real and personal properties owned
and used by CUSA for the operation of the North Refinery and the South Refinery.

     (h) Encumbrances Created by CUSA. CUSA has not conveyed any right, title or interest in the
Transferred Properties to any Person, including any Affiliate, except as described in the
Disclosure Letter, the title policy referenced in Section 6.2(v) or the Schedules attached hereto.
All of the Transferred Properties are free and clear of mortgages, mechanics’ liens, Tax liens and
other forms of security interests securing financial obligations of CUSA, except for those
disclosed to Buyers in the Disclosure Letter and except for Permitted Encumbrances; or, if such
liens exist, they have been bonded or otherwise secured against.

     (i) Represented Employees. The Represented Employees associated with the CUSA Properties are
represented by the International Union of Operating Engineers, AFL-CIO (IUOE), Local 351 (the
“Refinery Union”). No other Prospective Employees are represented by a union. No Prospective
Employees participate in any multi-employer pension plans or in any employee

38

 

benefit plans other
than those maintained as single employer pension or welfare plans by Sellers and their Affiliates.

     (j) No Brokers. CUSA has not incurred any liability, contingent or otherwise, for brokers’ or
finders’ fees relating to the transactions contemplated by this Agreement by which any of the
Buyers or any of the Transferred Properties would be liable.

     (k) Financial Data. CUSA has delivered to Buyers copies of financial data for the period
ending December 31, 2002 (the “Financial Data”) pursuant to the Confidentiality Agreement. The
Financial Data contains volumes, prices, and operating expenses which are based upon CUSA’s
internal management information and profit reporting systems. Certain CUSA expenses are determined
on a corporation-wide basis, and allocations and prorations of these expenses are then derived on
an analytical basis. Additionally, portions of the reported revenue and raw material costs are
priced internally based upon market indices. Accordingly, Financial Data is not audited or
constructed in accordance with accounting principles that are generally accepted in the United
States of America. This Financial Data has been utilized to prepare financial statements for the
CUSA Properties, which to the extent reasonably practical were constructed to represent the
financial position of the operations of the CUSA Properties had those operations been separated
from the other downstream operations of ChevronTexaco Corporation (“Financial Statements”). To the
knowledge of CUSA’s designated personnel, the Financial Data does not contain any untrue statement
of material fact which would make the Financial Data or the Financial Statements misleading.

     (l) Title to the Transferred Properties. Except as disclosed in this Agreement, in the
Disclosure Letter or in a preliminary title report received by any Buyer prior to the Closing Date,
(i) CUSA has not entered into any option, warrant, subscription or other right with a third party
for the purchase or sale of any of the CUSA Properties; (ii) to the knowledge of CUSA’s designated
personnel there are no unrecorded easements or encumbrances granted by CUSA, no rights to purchase
or acquire granted by CUSA, and no other restrictions or limitations created by CUSA which could
materially interfere with the Buyers’ ownership of or ability to use and operate the CUSA
Properties as they are now being used or operated. CUSA is not a party to any lease relating to any
CUSA Real Property (nor to any agreement or option to enter into such a lease) other than as set
forth in this Agreement, the Disclosure Letter or such a title report. To the knowledge of CUSA’s
designated personnel, CUSA is in compliance with any material restrictive covenants and other
restrictions against or affecting the CUSA Real Property, and no improvement or structure on any
CUSA Real Property encroaches on any adjacent land or onto any easements.

     (m) Pending Labor Disputes. Except as set forth in the Disclosure Letter:

     (i) Since January 1, 2000, CUSA has not received any written notification of any unfair
labor practice charges or complaints pending before any agency having jurisdiction thereof,
nor are there any current labor union representation claims involving any of the CUSA
Prospective Employees. To the knowledge of CUSA’s designated personnel, CUSA is not the
subject of any such threatened charges or claims.

39

 

     (ii) No strike, work stoppage, work slow down or lockouts have occurred since January
1, 1998 and are continuing or to the knowledge of CUSA’s designated personnel are threatened
affecting the CUSA Properties, and no question involving recognition of a collective
bargaining agent exists in respect of any CUSA Prospective Employees.

     (iii) To the knowledge of CUSA’s designated personnel, there are no pending labor
negotiations or union organization efforts relating to CUSA Prospective Employees.

     (iv) To the knowledge of CUSA’s designated personnel, there are no pending grievances
filed by CUSA Prospective Employees within any collective bargaining unit or by
representatives of employees within any collective bargaining unit. Further, there are no
arbitration decisions, settlement agreements, injunctions, consent decrees or conciliation
agreements which affect the operation of the CUSA Properties (other than those specifically
listed in the Disclosure Letter, and other than decisions not directly involving the
Transferred Properties, but affecting the refinery industry in general).

     (n) Employees. Schedule l6 accurately sets forth a list of all CUSA Prospective
Employees and, among other things, each such CUSA Prospective Employee’s job title and the date
such Prospective Employee’s service commenced.

     (o) Intellectual Property. To the knowledge of CUSA’s designated personnel, and except as
disclosed in this Agreement or the Disclosure Letter, the Technology Agreement and Schedule
13 (which schedule lists items excluded from the purchase and sale hereunder) list all material
intellectual property rights which are or have been in the past twelve (12) months used in
connection with the operation of the CUSA Properties, specifying as to each, as applicable: (i) the
nature of such intellectual property, right; (ii) the owner of such intellectual property right;
(iii) if such right is owned by a third party, whether such intellectual property right is
assignable to Buyers. To the knowledge of CUSA’s designated personnel, and except as disclosed in
this Agreement or the Disclosure Letter, no intellectual property right transferred hereunder is
subject to any outstanding order, judgment, decree, stipulation or agreement restricting the use
thereof by CUSA in connection with ownership or operations of any of the CUSA Properties.

     (p) Inventories. All Inventories are owned by CUSA free and clear of all Liens except
Permitted Liens.

     (q) Environmental Matters. To the knowledge of CUSA’s designated personnel, and except as
disclosed in this Agreement or the Disclosure Letter (i) no Government Authority having
jurisdiction has issued any order requiring the investigation and/or remediation of soil and/or
groundwater contamination on the CUSA Properties other than that which has been issued pursuant to
the CAMU Agreed Order, the 1988 Agreed Order and/or the RCRA Permit; (ii) there are no proposed or
threatened actions by any Government Authority having jurisdiction that, as of the Execution Date,
involve the issuance of a new order or permit requiring the investigation and/or remediation of
soil and/or groundwater contamination on the CUSA Properties, except as set forth in the Disclosure
Letter; and (iii) there has been no failure to file reports to the extent required by Laws with
respect to documented releases of Hazardous Materials from the CUSA

40

 

Properties, the South Refinery
or the CUSA-Retained Properties into soil or groundwater within the five (5) years prior to the
date hereof.

     (r) Manufacturing History. To the knowledge of CUSA’s designated personnel, halogenated
compounds have not been manufactured at the North refinery.

7.2 CPL’s Representations and Warranties. CPL represents and warrants the following to each Buyer
as of the Execution Date. As used herein, “to the knowledge of CPL’s designated personnel” means to
the actual knowledge of all the CPL personnel having authority and responsibility for the CPL
Properties that are listed in Schedule 17 attached to this Agreement.

     (a) Due Incorporation. CPL is a corporation duly organized, validly existing and in good
standing under the laws of the State of Delaware. CPL has all requisite corporate power and
authority to own, lease and operate its properties and to carry on its business as now being
conducted. CPL is in good standing as a foreign corporation authorized to transact intrastate
business in the State of Texas.

     (b) Due Authorization and Enforceability. CPL has full power and authority to enter into this
Agreement and the instruments and agreements hereunder and to consummate the transactions
contemplated hereby and thereby. The execution, delivery and performance of this Agreement and the
instruments and agreements hereunder have been duly approved, and no other corporate proceedings on
the part of CPL are necessary to authorize this Agreement, the instruments and agreements hereunder
or the transactions contemplated hereby and thereby. This Agreement and the instruments and
agreements hereunder have been duly and validly executed and delivered by CPL and are enforceable
against CPL in accordance with their respective terms, except as such enforceability may be limited
by applicable bankruptcy, insolvency, moratorium, reorganization or similar laws from time to time
in effect which affect creditors’ rights generally and by legal and equitable limitations on the
availability of specific remedies.

     (c) Defaults. To the knowledge of CPL’S designated personnel and except as disclosed to
Buyers in the Disclosure Letter, the CPL Applicable Contracts are in full force and effect; there
are no material defaults by CPL, or events that with notice or the lapse of time, or both, would
constitute a material default by CPL under the CPL Applicable Contracts or (to the knowledge of
CPL’s designated personnel) any other party thereto; and CPL has not received any notice that any
party to any of the CPL Applicable Contracts intends to terminate such agreement.

     (d) Notices of Violation. To the knowledge of CPL’S designated personnel and except as
disclosed to Buyers in the Disclosure Letter, CPL has not received between January 1, 1998 and the
Execution Date notice from any Government Authority claiming any substantial violation of any Law
(including any building, zoning or other ordinance) or CPL Applicable Permits, or requiring any
substantial work, construction or expenditure, or asserting any Tax penalty, with respect to the
CPL Properties.

     (e) Compliance with Laws and Permits. Except as disclosed to Buyers in Schedule 9 or
in the Disclosure Letter, to the knowledge of CPL’s designated personnel, and except for
noncompliance matters as to which a fine or other penalty would not be applicable, (i) the CPL

41

 

Applicable Permits constitute all the permits, licenses and other approvals currently utilized by
CPL in its operation of the CPL Properties; (ii) each of the Applicable Permits is valid and
subsisting, in full force and effect, and enforceable by CPL, (iii) upon the Closing each of the
Essential Permits of CPL as defined in Section 6.1(g) above transferred to Buyers by Closing
will be in full force and effect without any further consent, approval or other action of any
Governmental Body or third party; (iv) none of the CPL Applicable Permits have been, or is
currently threatened to be, revoked, canceled, suspended or modified; and (v) the CPL Properties
are currently being operated in compliance with applicable regulatory requirements and Applicable
Permits.

     (f) Litigation. Except as disclosed to Buyers in the Disclosure Letter, there are no actions,
suits or other litigation, proceedings or governmental investigations (including claims of
employment discrimination and intellectual property infringement) pending or, to the knowledge of
CPL’s designated personnel, threatened by, against or affecting CPL, or any of its officers,
director, employees or the stockholders thereof in their capacity as such, or any of the properties
or businesses of CPL, arising out of CPL’s ownership or operation of the Transferred Properties, or
which in any manner challenge or seek to prevent, enjoin, alter or delay the transactions
contemplated hereby, and to the knowledge of CPL’s designated personnel there are no facts or
circumstances which may give rise to any of the foregoing. Except as disclosed to Buyers in the
Disclosure Letter, CPL is not subject to any order, judgment, decree, stipulation or consent of or
with any court or other Government Authority which has or could have a substantially adverse
effect.

     (g) Inclusion of Properties. Except for the items specifically excluded in Section 2.4 and
Schedule 13, (i) the Transferred Properties include all the real and personal property
owned and used by CPL for the operation of the Transferred Pipelines (excluding Colorado City to
Snyder, Texas) as of the Closing Date, including the crude oil pipelines from Snyder to Wink,
Texas, from McCamey to Wink, Texas, and from Wink to El Paso, Texas; and (ii) the Transferred
Properties include all the real and personal property owned by CPL associated with the crude oil
pipeline assets from Colorado City to Snyder, Texas (without any warranty that such Colorado
City-Snyder assets are complete or capable of use or operation).

     (h) Encumbrances Created by CPL. CPL has not conveyed any right, title or interest in the
Transferred Properties to any Person, including any Affiliate, except as described in the
Disclosure Letter, the title policy referenced in Section 6.2(v) or in the Schedules attached
hereto. All of the Transferred Properties owned by CPL are free and clear of mortgages, mechanics’
liens, Tax liens and other forms of security interests securing financial obligations of CPL,
except for those disclosed to Buyers in the Disclosure Letter and Permitted Encumbrances; or, if
such liens exist, they have been bonded or secured against.

     (i) No Brokers. CPL has not incurred any liability, contingent or otherwise, for broker’ or
finders’ fees relating to the transactions contemplated by this Agreement by which any of the Buyer
or any of the Transferred Properties would be liable.

     (j) Title to the Transferred Properties. Except as disclosed in this Agreement, in the
Disclosure Letter or in a preliminary title report received by any Buyer prior to the Closing Date,
(i) CPL has not entered into any option, warrant, subscription or other right with a third party
for

42

 

the purchase or sale of any of the Transferred Properties; (ii) to the knowledge of CPL’s
designated personnel there are no unrecorded easements or encumbrances granted by CPL, no rights to
purchase or acquire granted by CPL, and no other restrictions or limitations created by CPL which
could materially interfere with the Buyers’ ownership of or ability to use and operate
the CPL Properties as they are now being used or operated. CPL is not a party to any lease
relating to any CPL Real Property (nor to any agreement or option to enter into such a lease) other
than as set forth in this Agreement, the Disclosure Letter or such a title report. To the
knowledge of CPL’s designated personnel, CPL is in compliance with any material restrictive
covenants and other restrictions against or affecting the CPL Real Property, and no improvement or
structure on any CPL Real Property encroaches on any adjacent land or onto any easements.

     (k) Pending Labor Disputes. Except as set forth in the Disclosure Letter:

     (i) Since January 1, 2000, CPL has not received any written notification of any unfair
labor practice charges or complaints pending before any agency having jurisdiction thereof,
nor are there any current labor union representation claims involving any of the CPL
Prospective Employees. To the knowledge of CPL’s designated personnel, the CPL is not the
subject of any such threatened charges or claims.

     (ii) No strike, work stoppage, work slow down or lockouts have occurred since January
1, 1998 and are continuing or to the knowledge of CPL’s designated personnel are threatened
affecting the CPL Properties, and no question involving recognition of a collective
bargaining agent exists in respect of any CPL Prospective Employees.

     (iii) To the knowledge of CPLs designated personnel, there are no pending labor
negotiations or union organization efforts relating to CPL Prospective Employees.

     (iv) To the knowledge of LPL’s designated personnel, there are no pending grievances
filed by CPL Prospective Employees within any collective bargaining unit or by
representatives of employees within any collective bargaining unit. Further, there are no
arbitration decisions, settlement agreements, injunctions, consent decrees or conciliation
agreements which affect the operation of the CPL Properties (other than those specifically
listed in the Disclosure Letter, and other than decisions not directly involving the CPL
Properties, but affecting the refinery industry in general).

     (l) Employees. Schedule 16 accurately sets forth a list of all CPL Prospective
Employees and, among other things, each such CPL Prospective Employee’s job title and the date such
Prospective Employee’s service commenced.

     (m) Intellectual Property. To the knowledge of CPL’s designated personnel, and except as
disclosed in this Agreement or the Disclosure Letter, the Technology Agreement and Schedule
13 (which schedule lists items excluded from the purchase and sale hereunder) list all material
intellectual property rights which are or have been in the past twelve (12) months used in
connection with the operation of the CPL Properties, specifying as to each, as applicable: (i) the
nature of such intellectual property right; (ii) the owner of such intellectual property right;
(iii) if such right is owned by a third party, whether such intellectual property right is
assignable

43

 

to Buyers. To the knowledge of CPL’s designated personnel, and except as disclosed in
this Agreement or the Disclosure Letter, no intellectual property right transferred hereunder is
subject to any outstanding order, judgment, decree, stipulation or agreement restricting the use
thereof by Sellers in connection with ownership or operations of any of the CPL Properties.

     (n) Environmental Matters. To the knowledge of CPL’s designated personnel, and except as
disclosed in this Agreement or the Disclosure Letter (i) no Government Authority having
jurisdiction has issued any order requiring the investigation and/or remediation of soil and/or
groundwater contamination on the CPL Properties; (ii) there has been no failure to file reports to
the extent required by Laws with respect to documented releases of Hazardous Materials from the CPL
Properties into soil or groundwater within the five (5) years prior to the date hereof; (iii) the
responsibility for environmental liabilities associated with the Rio Grande release on November 17,
1999 and the Kinder Morgan release on November 12, 2001 has been assumed by third parties; and,
(iv) CPL has completed remediation activities to below action levels for the following releases:
the Wink Tank Farm releases on October 9, 1999 and October 11, 1999; the Porterville South Field
release on August 29, 1993; the Sharon Ridge Pump Station release on January 29, 1994; the
Porterville Station release on January 3, 1996; the Milepost 124 release on April 7, 1997; the Wink
Tank Farm release on July 17, 1998; and, the Wink Tank #7 release on April 1, 2003.

     (o) Transport and Storage History. To the knowledge of CPL’S designated personnel and except
as disclosed in the Disclosure Letter, only crude oil, drag reducing agents or water has been
transported in the pipelines or stored in the tanks included in the CPL Properties and described in
Schedule 7 hereto.

7.3 Buyers’ Representations and Warranties. Each Buyer, severally and not jointly, represents and
warrants to Sellers as of the Execution Date as follows as to such Buyer:

     (a) Due Incorporation. Each Buyer is a limited partnership duly organized, validly existing
and in good standing under the laws of the State of its formation. Each Buyer has all requisite
power and authority to own, lease and operate its properties and to carry on its businesses as now
being conducted. Each Buyer is in good standing, and is authorized to transact intrastate business
in the State of Texas.

     (b) Due Authorization and Enforceability. Each Buyer has full power and authority to enter
into this Agreement and the instruments and agreements hereunder and to consummate the transactions
contemplated hereby and thereby. The execution, delivery and performance of this Agreement and the
instruments and agreements hereunder have been duly and validly approved and no other proceedings
on the part of Buyers are necessary to authorize this Agreement, the instruments and agreements
hereunder or the transactions contemplated hereby and thereby. This Agreement and the instruments
and agreements hereunder have been duly and validly executed and delivered by each Buyer and are
enforceable against each Buyer in accordance with their respective terms, except as such
enforceability may be limited by applicable bankruptcy, insolvency, moratorium, reorganization or
similar laws from time to time in effect which affect creditors’ rights generally and by legal and
equitable limitations on the availability of specific remedies.

44

 

     (c) No Brokers. None of the Buyers have incurred any liability, contingent or otherwise, for
brokers’ or finders’ fees relating to the transactions contemplated by this Agreement by which
Sellers or any of their Affiliates would be liable.

     (d) Experienced Investor. Refinery Buyer has been engaged in conducting refining, marketing
and transportation businesses with respect to the South Refinery. Prior to entering into this
Agreement, Buyers were advised by their own legal, tax and other professional counsel concerning
this Agreement, the Transferred Properties and the value thereof. Buyers are aware of the risks and
uncertainties of an investment in refining, marketing and pipeline properties and operations and
are able to absorb a loss of their investment.

     (e) Tax Registrations. Refinery Buyer is registered or is in the process of registering for
the following federal and state sales and excise taxes: Federal excise tax (Form 637), Texas and
New Mexico motor fuel tax, and Texas sales and use tax, and will obtain a Texas direct pay permit.

7.4 Survival. The representations and warranties of Sellers in Sections 7.1 and 7.2 and the
representations and warranties of Buyers in Section 7.3 shall survive the Closing of the
transaction contemplated by this Agreement, but shall expire two (2) years after the Closing,
except to the extent that a notice of claim under this Article 7, filed in accordance with Sections
3.1(a) or (b) or 3.2(a), as applicable, shall have been given to the Party obligated thereunder
within such two-year period.

7.5 Exclusivity of Warranties and Specific Disclaimers. Buyers acknowledge that at Closing they
will acquire the Transferred Properties on the basis of their own investigation of the physical
condition of the Transferred Properties and assume the risk that adverse conditions outside the
scope of Sellers’ representations and warranties set forth in Sections 7.1 and 7.2 may not be
revealed by Buyers’ own investigation. Buyers acknowledge that EXCEPT AS EXPRESSLY PROVIDED IN THIS
AGREEMENT, (i) THE TRANSFERRED PROPERTIES ARE SOLD “AS IS” AND “WITH ALL FAULTS,” (ii) NO WARRANTY,
EXPRESS OR IMPLIED, IN FACT OR BY LAW, WHETHER OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR
PURPOSE, CONDITION OR OTHERWISE, CONCERNING THE TRANSFERRED PROPERTIES HAS BEEN MADE TO BUYERS, AND
(iii) BUYERS’ REMEDIES AGAINST SELLERS AND SELLERS’ LIABILITIES TO BUYERS FOR CONDITIONS ASSOCIATED
WITH THE TRANSFERRED PROPERTIES ARE LIMITED TO THOSE PROVIDED IN THIS AGREEMENT. Without limiting
the foregoing, Buyers acknowledge and assume the following specific disclaimers:

     (i) Buyers have made their own estimate of prospective data such as future revenues,
operating costs, and liabilities based on Buyers’ own abilities and skills to operate these
properties, and are not relying on Sellers’ own estimates of such data.

     (ii) Low levels of naturally occurring radioactive material (“NORM”) may be present at
some locations where the Transferred Properties are located.

     (iii) Certain Transferred Properties lie or may lie within a flood plain or flood zone
as designated by the Federal Emergency Management Agency or its designees.

45

 

     (iv) Sellers do not warrant that ownership or operation of the Transferred Properties
would not infringe any patent, copyright, trademark or trade secret rights of any Person.

     (v) Certain equipment on the Transferred Properties includes asbestos-containing
materials; however, this acknowledgement by the Buyers shall not limit or alter in any
manner Sellers’ liability pursuant to Section 3.1 of this Agreement.

     (vi) WAIVER OF CONSUMER RIGHTS. BUYERS WAIVE THEIR RIGHTS UNDER THE TEXAS DECEPTIVE
TRADE PRACTICES-CONSUMER PROTECTION ACT, SECTION 17.41 ET SEQ., TEXAS BUSINESS & COMMERCE
CODE, A LAW THAT GIVES CONSUMERS SPECIAL RIGHTS AND PROTECTIONS. AFTER CONSULTATION WITH AN
ATTORNEY OF BUYERS’ OWN SELECTION, BUYERS VOLUNTARILY CONSENT TO THIS WAIVER. IN ORDER TO
EVIDENCE THEIR ABILITY TO CONSENT TO SUCH WAIVER, BUYERS HEREBY REPRESENT AND WARRANT TO
SELLERS THAT BUYERS (i) ARE IN THE BUSINESS OF SEEKING OR ACQUIRING, BY PURCHASE OR LEASE,
GOODS OR SERVICES FOR COMMERCIAL OR BUSINESS USE, (ii) HAVE KNOWLEDGE AND EXPERIENCE IN
FINANCIAL AND BUSINESS MATTERS THAT ENABLE THEM TO EVALUATE THE MERITS AND RISKS OF THE
TRANSACTION CONTEMPLATED HEREBY AND (iii) ARE NOT IN A SIGNIFICANTLY DISPARATE BARGAINING
POSITION.

ARTICLE 8

PRE-CLOSING COVENANTS

8.1 Buyers’ Inspections.

     (a) Prior to the Execution Date, Buyers have had the opportunity to conduct due diligence
reviews of the Transferred Properties in accordance with the Confidentiality Agreement, including
the review of certain information with respect to the finances, operations, financial and operating
results, markets, customers and suppliers, properties, methods of doing business, personnel,
contracts, commitments or contingencies or legal affairs involving the Transferred Properties, as
well as the products, processes or scientific, technical or engineering information developed,
owned or licensed by Sellers that are related to the Transferred Properties. Buyers shall have the
right between the Execution Date and the Closing Date to inspect the Transferred Properties, public
records and the records made available by Sellers to Buyers pursuant to the Confidentiality
Agreement with respect to the quality and validity of Sellers’ title to the Transferred Properties.

     (b) Sellers hereby grant to Buyers and their representatives the right at each such Buyer’s
sole risk to enter onto the Transferred Properties from time to time upon reasonable notice to
Sellers, for the purposes of inspection of the Transferred Properties. If any Buyer plans to
conduct any activities on the Transferred Properties which may affect Sellers’ operations,
including any soil or groundwater sampling or analysis, such Buyer shall provide Sellers with

46

 

written notification of such plans and shall obtain Sellers’ written approval and all necessary
approvals from Government Authorities prior to conducting any such activities.

     (c) Each Buyer waives and releases all claims against ChevronTexaco Corporation, Sellers and
their respective Affiliates, and their directors, officers, employees and agents, for injury to or
death of any persons or damage to property arising in any way from the exercise of rights granted
to Buyers by this Section 8.1 or the activities performed pursuant to this Section 8.1 by Buyers or
their representatives on the Transferred Properties.

     (d) Buyers shall maintain at a minimum the following types and amounts of insurance with
respect to the exercise by Buyers and their representatives of the rights granted in this Section
8.1:

     (i) commercial general liability and property damage insurance with limits of not less
than $2,000,000 combined single limit per occurrence;

     (ii) automobile liability insurance with a $2,000,000 limit;

     (iii) workers’ compensation insurance with limits as required by law; and

     (iv) employer’s liability insurance with a $2,000,000 limit.

Buyers shall furnish to Sellers a certificate evidencing the existence of the insurance required
hereunder, confirming that the insurance:

     (i) is obtained from and maintained with primary and/or excess insurers acceptable to
Sellers;

     (ii) covers Buyers’ obligations under the indemnity provisions of this Section 8.1;

     (iii) names ChevronTexaco Corporation, Sellers and their respective Affiliates as
additional insureds (or, in the case of workers’ compensation insurance, provides a waiver
of subrogation to any rights against ChevronTexaco Corporation, Sellers and their respective
Affiliates); and

     (iv) contains a provision pursuant to which the insurer agrees not to cancel or modify
the insurance coverage without furnishing at least thirty (30) days’ prior written notice to
Sellers.

     (e) Each Buyer shall release, defend, indemnify and hold harmless ChevronTexaco Corporation,
Sellers and their respective Affiliates, and their directors, officers, employees and agents, from
and against any and all Losses arising out of (i) any and all statutory or common law liens or
other encumbrances for labor or materials furnished in connection with such rights granted
hereunder, including samplings, studies or surveys that such Buyer may conduct with respect to the
Transferred Properties pursuant to this Section 8.1, or (ii) any injury to or death of persons or
damage to property
occurring in, on or about the Transferred Properties as a result of such exercise of the

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rights granted hereunder or activities conducted pursuant to this Section 8.1. This indemnity shall
not apply to the extent that it is void or otherwise unenforceable under applicable law in effect
on or validly retroactive to the execution date of this Agreement and shall not apply where such
loss, cost, damage, injury, liability or claim is the result of the sole negligence or willful
misconduct of any Indemnitee.

     (f) Each Buyer shall not permit its activities permitted by this Section 8.1 to unreasonably
interfere with the business and operations of the Transferred Properties, and agrees that such
inspections shall be subject to the Confidentiality Agreement. Such activities shall also be
conducted in compliance with Laws and Sellers’ safety regulations.

8.2 Operation of Transferred Properties Prior to Closing.

     (a) In the event a material adverse change in the physical condition of the Transferred
Properties arises between the Execution Date and the Closing Date, and such event results in a
reduction of the economic value of the Transferred Properties by more than One Million Five Hundred
Thousand Dollars ($1,500,000), Sellers shall promptly notify Buyers of such event. If Sellers
undertake to remedy the material adverse change in a manner reasonably satisfactory to the Buyers,
the Agreement shall continue in full force and effect in accordance with the terms and conditions
thereof. Alternatively, the Parties may elect to negotiate an appropriate adjustment to the terms
of the Agreement to reflect the impact of such material adverse change. If Sellers do not undertake
to remedy the adverse material change or no alternative adjustment is agreed, either Sellers
(acting collectively) or Buyers (acting collectively) may elect to terminate the Agreement by
written notice to the other Parties given within 15 calendar days after becoming aware of such
material adverse change, in which event Sellers shall refund the principal amount of the Deposit
and any interest thereon at the Prime Rate as provided in Article 4, and none of the Parties shall
have any further rights or obligations hereunder. If no such notice of termination is timely given,
the Agreement shall continue in effect, and upon the Closing, Sellers shall further assign to
Buyers any claims against third parties resulting from such material adverse change (other than
claims under the ChevronTexaco Policies, or claims for expenses incurred by Sellers in remedying
the material adverse change).

     (b) Except as otherwise provided herein or with the prior written approval of Buyers (acting
collectively), between the Execution Date and the Closing Date Sellers will operate the Transferred
Properties in the ordinary course of business, and shall not sell, transfer or abandon any portion
of the Transferred Properties belonging to them (other than the sale, transfer or abandonment in
the ordinary course of the operations consistent with past practices of (i) Inventories of any
value or (ii) other items having a per item fair market value of less than $10,000 of materials,
supplies, spare parts, inventories, furniture, motor vehicles, rolling stock, tools, implements,
appliances, machinery, equipment, improvements or other tangible personal property or fixtures
forming a part of the Transferred Properties).

8.3 Announcements. Except for disclosures that Sellers or Buyers reasonably believe are required by Law or any
securities exchange to which Sellers or Buyers may be subject, neither Sellers nor Buyers shall
issue any press release or otherwise make any public announcement on or prior to the Closing Date
with respect to this transaction without the prior written consent of the other Parties, which
shall not be unreasonably withheld or delayed.

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8.4 Requirements for Transfer of Transferred Properties.

     (a) Transfer of Applicable Contracts. At and effective as of the Closing, Sellers shall
assign all their rights and delegate performance of all their duties to Refinery Buyer and Pipeline
Buyer, respectively, under the contracts included in the Applicable Contracts as described in
Schedules 4 and 8, respectively, and Refinery Buyer and Pipeline Buyer, as applicable,
shall assume and agree to perform all duties of Sellers under each such contract. Without
limitation, such assumption by Buyer includes its assumption of any termination charges associated
with a termination of any such contract made after the Closing. Notwithstanding the foregoing, the
contracts described in Schedules 4 and 8 as requiring notice to or consent from third
parties shall not be assigned until and unless the proper notice or consent shall have been
satisfied. Buyers and Sellers shall use their commercially reasonable efforts, each as to matters
within its control, to satisfy such requirements as of the Closing Date. Subject to Sections 6.1(g)
and 6.2(f), if any such requirement is not satisfied as of the Closing and the Closing occurs,
Sellers and Buyers shall consider whether to exclude the affected contracts from the transfer
hereunder or to enter into alternative arrangements with each other or with third parties, but in
no event shall the Purchase Price be adjusted in respect of exclusion of any contract.

     (b) Marketing Contracts. Without limitation on the provisions of clause (a) above, but
subject to Sections 6.1(g) and 6.2(f), the Parties agree that if, despite the Parties’ commercially
reasonable efforts to secure required consents to any of the CUSA Applicable Contracts identified
as “marketing contracts” in Schedule 4, any such required consent is not obtained by the
Closing Date, CUSA shall retain the contract at Closing but CUSA and Refinery Buyer shall enter
into an agreement whereby the net economic benefit or loss (being net of all costs of Sellers)
resulting from performance of such contract with respect to deliveries after the Closing Date is
for Refinery Buyer’s account and Refinery Buyer shall provide to CUSA the volume of product meeting
the requirements of such contract for deliveries after the Closing Date.

     (c) Transfer of Applicable Permits, Easements and Rights-of-Way. Buyers and Sellers shall use
their commercially reasonable efforts, each as to matters within its control, to cause the
Applicable Permits as described in Schedules 5 and 9 and the beneficial easements and
rights-of-way as described in Schedule 6 to be transferred or reissued in favor of (i)
Refinery Buyer with respect to Applicable Permits described in Schedule 5 and (ii) Pipeline
Buyer with respect to Applicable Permits described in Schedule 9 and beneficial easements
and rights-of-way described in Schedule 6 effective as of the Closing Date. Effective on
transfer or reissuance of each such permit, easement, or right-of-way, Refinery Buyer and Pipeline
Buyer, as applicable, shall assume and agree to perform all duties thereunder from and after the
Closing. Notwithstanding the foregoing, the permits, easements or rights-of-way identified as
requiring
notice, consent or action by any Government Authority or third party shall not be assigned
until and unless the proper notice, consent or action requirement shall have been satisfied.
Sellers and Buyers shall use their commercially reasonable efforts, each as to matters within its
control, to satisfy such requirements as soon as reasonably practicable. Subject to Sections 6.1(g)
and 6.2(f), if any such requirement is not satisfied as of the Closing and the Closing occurs,
Sellers and Buyers shall consider whether to exclude the affected permit, easement, or right-of-way
from the transfer hereunder or to enter into alternative arrangements with each other or with third
parties,

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but in no event shall the Purchase Price be adjusted in respect of exclusion of any
permit, easement or right-of-way.

     (d) Costs of Transfer of Applicable Permits, Easements and Rights-of-Way. Buyers shall bear
all costs and expenses incurred in connection with the transfer, amendment, reissuance or issuance
of Applicable Permits, easements or rights-of-way to Buyers. Buyers, at their sole expense, shall
provide bonds or other security as may be required by Government Authorities for the transfer or
reissuance of the Applicable Permits to Buyers.

     (e) Property Line Adjustments. To the extent that the lot line adjustments required pursuant
to this Agreement or the Exhibits or Schedules hereto have not been completed of record on or
before the Closing Date, Sellers shall retain and shall perform at their expense the obligations to
effect such adjustments.

     (f) South Refinery PLL Insurance Policy. Refinery Buyer shall use its best efforts to cause
CUSA, Chevron Environmental Management Company, Texaco, and TRMI to be added as additional insureds
for coverages A through H under the South Refinery PLL Insurance Policy. CUSA shall not tender, and
shall cause Chevron Environmental Management Company, Texaco, and TRMI not to tender, the defense
of or coverage under the South Refinery PLL Insurance Policy for any item to which Refinery Buyer
is entitled to indemnity under Section 3.1.

8.5 Other Government Authority Reviews and Approvals.

     (a) Pre Merger Notification. The consummation of the transactions contemplated by this
Agreement may be subject to the pre-merger notification requirements of Section 7A of the Clayton
Act (15 U.S.C. § 18a) as enacted by the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the
“HSR Act’’). Sellers and Buyers shall cooperate and promptly undertake all filings and other
actions as may be required to comply with such requirements. Should the reviewing agency advise any
Party of its need for additional information, that Party, with the cooperation of the other Parties
if appropriate, shall promptly respond to the reviewing agency’s request. Should the reviewing
agency or another interested governmental agency advise any Party of its opposition to the
transactions contemplated herein, the Parties shall diligently endeavor to persuade the agency
concerned to abandon its opposition and, failing to do so, the Parties shall take such additional
action as they may agree.

     (b) Regulatory Approvals. Without limitation on the conditions for transfer of the Applicable
Permits, the transfer of ownership of certain of the Transferred Properties are subject to prior
approval by the City of El Paso or the County of El Paso in accordance with applicable
Laws. If any such agency has not approved the transfer of ownership of certain Transferred
Properties (the “Deferred Properties”) by the scheduled Closing Date and the conditions precedent
for closing with respect to the other Transferred Properties have been satisfied, then (i) the
Closing shall proceed in accordance with all terms of this Agreement with respect to all
Transferred Properties other than the Deferred Properties, (ii) Sellers and Buyers shall negotiate
and enter into mutually satisfactory transportation or operating agreements that provide Buyers
with use of the Deferred Properties in compliance with Laws until the date such Deferred Properties
are transferred to Buyers, as applicable, and (iii) Sellers and Buyers shall use their commercially
reasonable efforts, each as to matters within its control, to obtain the approval of

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the agency as
soon as practicable after the Closing Date, at which time the Deferred Properties shall be
transferred to Buyers in accordance with the terms of this Agreement.

     (c) Tariffs. Certain of the Transferred Properties being conveyed hereunder are operated as a
common carrier pipeline system subject to tariffs filed with TRRC and with FERC. Buyers shall adopt
such tariffs as of the Closing or, upon written notification by Buyers not later than 10 Business
Days prior to the Closing Date, Sellers shall withdraw such tariff’s as Buyers may designate.

     (d) Ownership Change Filings. Buyers shall promptly and diligently make all necessary filings
and satisfy all necessary requirements with appropriate Government Authorities in order to transfer
ownership and operations of the Transferred Properties from Sellers to Buyers.

8.6 Replacement or Provision of Security. By the Closing Date, Buyers shall cause to be released
and returned to Sellers any bonds or other security provided by any Sellers or any of their
Affiliates to Government Authorities or other third parties in connection with the Transferred
Properties as described in Schedule 18 attached to this Agreement. Buyers shall arrange for
substitute security for any commitments which are canceled or terminated pursuant to this Section.
Buyers shall cause to be furnished any insurance, bonds or other security required in connection
with the ownership, operation, maintenance, improvement, use or closure of the Transferred
Properties on and after the Closing Date.

8.7 CPL Real Property Title Matters.

     (a) Pipeline Buyer shall, at its own expense, conduct such title examination of the CPL Real
Property that they deem appropriate prior to Closing pursuant to Section 8.l(a) above. Within ten
(10) days following the Execution Date, Pipeline Buyer shall provide CPL written notice of any
title gaps or material title defects relating to the CPL Real Property that Pipeline Buyer has
identified (each a “CPL Real Property Title Defect”). Such written notice shall set forth, in
reasonable detail, the facts of each such CPL Real Property Title Defect.

     (b) At Closing CPL shall, with respect to each CPL Real Property Title Defect, have the
option, at CPL’S discretion, to either:

     (i) commence and continue to diligently undertake curative actions necessary to remedy
such CPL Real Property Title Defect, or

     (ii) provide Pipeline Buyer with written notice of Sellers’ election to defer taking
such curative actions necessary to remedy such CPL Real Property Title Defect in return for
CPL’s providing the Pipeline Buyer with an indemnity, consistent with the indemnities
provided in Article 3 above, for Losses resulting from Third-Party Actions or Government
Authority actions arising as a result of such CPL Real Property Title Defect for a period of
three (3) years following the Closing Date.

     (c) Pipeline Buyer agrees to cooperate with CPL in furtherance of CPL’s efforts to perform
title curative actions, including Pipeline Buyer’s filing and pursuing condemnation actions when
reasonably requested by CPL, and at CPL’ s cost.

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     (d) Except as expressly provided in Section 7.2(h) and Section 7.2(j), CPL makes no general
warranty of title to the CPL Real Property and is selling only such interest or interests, if any,
as it may own in the CPL Real Property.

8.8 Transfer of South Refinery Permits. CUSA and Refinery Buyer shall use their commercially
reasonable efforts, each as to matters within its control, to cause the industrial waste discharge
permit number 180-4276.300 and stormwater general permit TXR05M994 to be transferred or reissued in
favor of Refinery Buyer effective as of the Closing. Effective on transfer or reissuance of each
such permit, Refinery Buyer shall assume and agree to perform all duties thereunder from and after
the Closing.

8.9 Application for Texas Direct Pay Permit. Within five (5) business days following the Execution
Date, Buyers shall each apply for a Texas direct pay permit.

ARTICLE 9

POST-CLOSING COVENANTS

9.1 Termination of Rights to Sellers’ Insurance.

     (a) Sellers and Buyers acknowledge that ChevronTexaco Corporation, Texaco and Gulf Oil Company
have maintained worldwide programs of property and liability insurance coverage for themselves and
their Affiliates, including Sellers with respect to the Transferred Properties, that include
insurance policies that are written or reinsured by Heddington Insurance Company, Bermaco Insurance
Company and Insco Limited (which are Affiliates of ChevronTexaco Corporation) and insurance
policies that require the payment of retrospective premium adjustments to cover losses. All of the
insurance policies through which such worldwide programs of coverage are presently or have
previously been provided (including,
without limitation, all employers’ liability insurance policies) are herein called the
“ChevronTexaco Policies.”

     (b) It is the understanding and intention of Sellers and Buyers that:

     (i) from and after the Closing, no insurance coverage shall be provided for Buyers
under the ChevronTexaco Policies relating to the Transferred Properties; and

     (ii) from and after the Closing, no claims regarding any matter whatsoever, whether or
not arising from events occurring prior to, at or after Closing, shall be made against or
with respect to the ChevronTexaco Policies by Buyers.

     (c) Each Buyer, on behalf of itself and its successors and assigns, hereby releases, to the
extent permitted by applicable Law, Seller and their Affiliates from any claim made after the
Closing against or with respect to any of the ChevronTexaco Policies by or through Buyers.

     (d) Nothing contained in the foregoing provision of this Section 9.1 shall in any way limit,
impair or constitute a release or discharge of any right of any Buyer or obligation of Sellers with
respect to any representation, warranty, covenant, agreement, indemnity or other obligation of
Sellers contained in this Agreement (regardless of whether the same was, is or may be covered

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by any insurance described herein), all of which rights and obligations shall continue in full force
and effect.

9.2 Removal of Proprietary Information. Except as provided in any third party license included in
the Transferred Properties, Sellers may remove all proprietary information in tangible or
intangible form that is (i) owned by a third party (or is not in use or has not been in use within
one (1) year prior to Closing) at the Transferred Properties, (ii) proprietary to Sellers or their
Affiliates, or (iii) otherwise excluded from the Transferred Properties pursuant to Section 2.4.

9.3 Replacement of Sellers’ Identification. Buyers shall, at their own expense and in a timely
manner not exceeding 30 calendar days after the Closing, remove or cause to be removed all signs
and placards which identify Sellers as prior owner or operator of each of the Transferred
Properties, including any usage of trademarks or trade names of Sellers and their Affiliates.
Buyers shall, at their own expense and in a timely manner not to exceed one week after the Closing,
erect or install signs and placards as may be required by state or other governmental agencies
identifying Buyer as the owner and/or operator of each of the Transferred Properties.

9.4 CUSA’s Performance of Free Product Recovery Activities. CUSA shall perform all Free Product
Recovery Activities requirements of the 1988 Agreed Order. The TCEQ’s determination as to the
parties named in the 1988 Agreed Order shall not affect any allocation of liability under this
Agreement. CUSA’s obligation to perform Free Product Recovery Activities shall terminate on the
earliest to occur of the following: (i) the date when the TCEQ gives written notice that the Free
Product Recovery Activity requirements in the
1988 Agreed Order have been completed to the TCEQ’s satisfaction; or (ii) the date on which an
insurance policy or risk transfer mechanism meeting the requirements of Section 9.24 below is
caused by CUSA to become effective. Sellers’ sole liability for Free Product Recovery Activities is
limited to those obligations set forth in this Section 9.4. CUSA shall use commercially reasonable
efforts to avoid groundwater injection on the Refinery Buyer Properties as long as sewer disposal
continues to be an economic means of handling groundwater produced from Free Product Recovery
Activities. Groundwater injection shall be in conformance with the TCEQ orders and regulatory
standards, with prior notification to Buyer. Unless directed or requested by the TCEQ or other
Government Authority having jurisdiction, CUSA will not operate any injection well, existing at
Closing or installed after Closing, that divides the free product plume along Trowbridge Road or
for any other purpose involving the displacement of the free product plume.

9.5 Remediation and Conveyance of CUSA-Retained Option Property.

     (a) Buyers shall cooperate and provide reasonable access and assistance regarding Sellers’
SWMU Remediation, including construction, operation and maintenance of a CAMU. For purposes of this
Section 9.5, the term “reasonable access” shall mean that access permitted in those easements set
forth in the Easement Agreement attached hereto as Exhibit E-I.

     (b) CUSA may elect to perform Sellers’ SWMU Remediation activities on either the Transferred
Properties or subsequently conveyed CUSA Retained Properties where either such properties are
adjacent to the CUSA-Retained Property provided such activities will not materially interfere with
Buyers’ operations at such properties and, in CUSA’s reasonable

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judgment, such additional Sellers’
SWMU Remediation will be necessary in order to obtain TCEQ’s approval of the remediation of the
CUSA-Retained Option Property. In such event, by written notice to Buyers, CUSA may require that
the Parties enter into such lot line adjustments, deed restrictions, restrictive covenants,
easement agreements or leases as may be reasonably required to secure the TCEQ’ s approval for
Sellers’ SWMU Remediation activities.

     (c) CUSA, at its option on thirty (30) days’ prior written notice to Refinery Buyer (each a
“Notice Triggering Sellers’ Option Period”), may convey to Refinery Buyer and Refinery Buyer shall
accept conveyance of title to any Internal Solid Waste Management Unit Parcel, provided that as of
the date of any such notice CUSA either (i) has achieved regulatory closure from the TCEQ for each
Internal Solid Waste Management Unit contained in such Internal Solid Waste Management Unit Parcel
(which closure shall be predicated upon industrial use, and which may be conditioned on deed
restrictions limiting the use of such property for industrial purposes) or (ii) has removed the top
five (5) feet of contaminated soil from the affected Internal Solid Waste Management Unit,
replacing such contaminated soils with Clean Backfill (“Remediation Objectives”). Before conveying
any Internal Solid Waste Management Unit Parcel pursuant to Section 9.5(c)(ii) above, CUSA shall
provide Refinery Buyer with notice as provided above and provide Refinery Buyer with an opportunity
to review CUSA’s actions with respect to soil removal and replacement and the regulatory status of
the affected Internal Solid Waste Management Unit Parcel. If Refinery Buyer notifies CUSA within
such 30-day period that it can reasonably demonstrate that conveyance of the affected Internal
Solid Waste Management
Unit Parcel would subject Refinery Buyer to new permitting requirements under Subtitle C of
the Resource Conservation and Recovery Act as a result of CUSA’s soil removal and replacement and
the conveyance of such Internal Solid Waste Management Unit Parcel, the conveyance shall be
deferred while Refinery Buyer demonstrates to CUSA the basis on which the new permitting
requirements would be created. If such discussions do not result in an agreement that new
permitting requirements would be created within 90 days of the commencement of such discussions,
either Refinery Buyer or CUSA may refer the matter as a Dispute for resolution under Section 12.6,
with Refinery Buyer bearing the burden of persuasion in any arbitration proceeding. If it is agreed
or established through arbitration that new permitting requirements would be created, the
conveyance of the affected Internal Solid Waste Management Unit Parcel shall be deferred until CUSA
obtains and provides evidence reasonably satisfactory to Refinery Buyer of acceptance by the TCEQ
of closure of the affected Internal Solid Waste Management Unit. Such Internal Solid Waste
Management Unit Parcel shall be conveyed to Refinery Buyer subject to the indemnity provisions of
this Agreement and the terms and conditions of the Option Agreement.

     (d) Upon Sellers’ completion of their obligations (with the exception of postclosure care
requirements) under the RCRA Permit and CAMU Agreed Order relating to the Primary Option Property,
Sellers shall provide written notice to Buyers (the “Notice Triggering Buyers’ Option Period”).
Following the Refinery Buyer’s receipt of the Notice Triggering Buyers’ Option Period, Refinery
Buyer shall have the option, subject to compliance with all of the terms and conditions of the
Option Agreement (Exhibit Q, to acquire title to the Primary Option Property.

     (e) If a corrective measure study is required pursuant to the RCRA Permit for any of the
Internal Solid Waste Management Units, then CUSA shall conduct at its own expense such

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corrective measure study, provided that all of the Corrective Action Conditions Precedent are satisfied for
such Internal Solid Waste Management Unit. If CUSA is required to perform such a corrective measure
study pursuant to this Section 9.5(e) and as a result the TCEQ requires the implementation of
corrective measures for the subject Internal Solid Waste Management Unit, then CUSA, at its
expense, shall conduct such corrective measures, provided that all of the Corrective Action
Conditions Precedent are satisfied for such Internal Solid Waste Management Unit. CUSA’s
obligations under this Section 9.5(e) shall terminate as to any expenses not required to be
incurred within five (5) years following the date of conveyance to the Refinery Buyer of the
Internal Solid Waste Management Unit Parcel containing the applicable Internal Solid Waste
Management Unit. If any groundwater monitoring is required pursuant to the RCRA Permit, CUSA shall
be responsible for conducting such groundwater monitoring, — at its — sole cost, until the date
Refinery Buyer exercises its option to acquire the Primary Option Property; thereafter, all
obligations, including those related to groundwater monitoring related to the RCRA Permit, shall be
assumed by Refinery Buyer and the Refinery Buyer shall cause the RCRA Permit to be transferred to
the Refinery Buyer (if the permit has not been terminated by the TCEQ).

     (f) If Refinery Buyer and CUSA cannot agree within thirty (30) days after notice by either
Party whether the conditions precedent required for conveyance of title to any of the Internal
Solid Waste Management Unit Parcels or the Corrective Action Conditions Precedent have been
satisfied, then either of them may, by written notice to the other, require that the
matter be submitted to binding, non-appealable determination before an expert who shall decide
whether such conditions have been satisfied. If the Parties have not selected the expert in advance
or agreed on the expert within five (5) days following the date of such notice, the expert shall be
selected by the Houston, Texas office of Deloitte & Touche. Refinery Buyer and CUSA shall have
thirty (30) days following the date of such notice to present evidence to such expert. The expert’s
costs shall be shared equally by Refinery Buyer and CUSA, and any other costs incurred by either
Party relating to such determination shall be borne by such Party.

9.6 Buyers’ Corrective Action Cooperation Covenants. In support of performance of Corrective
Action by Sellers or their respective designees as described in this Agreement, each Buyer
covenants as follows:

     (a) Refinery Buyer shall use commercially reasonable efforts, consistent with industry
standards, to operate all underground lines and storage tanks (both above ground and below ground)
on the North Refinery and the South Refinery in conformance with good industry practices, and with
all Laws relating to the inspection, testing, maintenance, and repair of such lines and tanks.
Refinery Buyer shall have all responsibility associated with compliance obligations, whether under
the 1988 Agreed Order or applicable Law related to the post-Closing maintenance, operation, testing
and inspection of above-ground tanks, below ground tanks and underground lines, and shall indemnify
Sellers pursuant to Section 3.2(b) for Refinery Buyer’s failure to comply with such requirements.
Refinery Buyer shall provide CUSA upon request with access to and copies of all correspondence with
the TCEQ associated with such legal obligations related to tank and line operation, maintenance,
inspection and integrity testing.

     (b) Refinery Buyer agrees to the following restrictions on the manufacture and use of ethers
and alcohols:

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     (i) Refinery Buyer shall not manufacture any ethers (including MfiBE) or alcohols
(including ethanol) on any portion of the North Refinery or South Refinery;

     (ii) Refinery Buyer shall not store, transport or handle any ethers (including MTBE) or
blended hydrocarbons containing ethers on any portion of the North Refinery. Refinery Buyer
shall not store, transport or handle any alcohols (including ethanol) or blended
hydrocarbons containing alcohols on any portion of the North Refinery except as provided in
subsection (v).

     (iii) Refinery Buyer shall not store, transport or handle any ethers (including MTBE)
or blended hydrocarbons containing ethers on any portion of the South Refinery (other than
as permitted pursuant to clause (iv) below), and Refinery Buyer and CUSA agree that sections
1(a) and 5(b) of the July 1998 Settlement Agreement remain in full force and effect and
shall survive the Closing. Refinery Buyer shall have the option, exercisable following
CUSA’s acknowledgement of receipt of written notice from Refinery Buyer to CUSA within two
(2) years of the Closing Date, to have the right to store, transport or handle any ethers
(including MTBE) or blended hydrocarbons containing ethers on any portion of the South
Refinery (in addition to the rights permitted pursuant to clause (iv) below) in strict
conformance with subsections (vii) and (viii),
provided that CUSA’s liability under the surviving sections 1(a) and 5(b) of the July
1998 Settlement Agreement will terminate automatically on the exercise of such option.

     (iv) Refinery Buyer may store, transport and handle blended hydrocarbons containing
ethers that are pre-blended (offsite) at market levels on the South Refinery in strict
conformance with subsections (vii) and (viii).

     (v) Refinery Buyer may store, transport and handle ethanol on the North Refinery light
products marketing terminal but only to the extent that such activities are conducted in the
same or more protective manner that CUSA stored, transported and handled ethanol as of the
Closing Date.

     (vi) Refinery Buyer shall not store, transport or handle on any portion of the South
Refinery any alcohols (including ethanol) or blended hydrocarbons containing alcohols.

     (vii) In those circumstances set forth in subsections (iii) and (iv) where Refinery
Buyer is authorized to store, transport and handle either ethers (including MTBE) or blended
hydrocarbons containing ethers, the Refinery Buyer shall (A) hydrotest the above-ground
lines used for transport of ethers or blended hydrocarbons containing ethers, at least once
every six months; (B) maintain and monitor cathodic protection systems in accordance with
American Petroleum Institute standards for lines and tanks used for transport, storage or
handling of ethers or blended hydrocarbons containing ethers; (C) perform monthly
inspections of above-ground lines and tanks used for transport, storage or handling of
ethers or blended hydrocarbons containing ethers, including verification of tank levels and
inspection of seepholes; and (D) use (1) only above-ground lines and (2) double-bottom tanks
or tanks with leak detection systems, all

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in accordance with good industry practices for the
transport, storage and handling of ethers or blended hydrocarbons containing ethers.

     (viii) Refinery Buyer shall, at its expense, cause a third-party engineering firm
reasonably acceptable to CUSA to certify at least annually that Refinery Buyer is in
compliance with the requirements of this Section 9.6(b), and shall promptly provide CUSA
with a copy of each such certificate. Nothing in this Section 9.6(b) shall prohibit the
utilization of those product lines regulated by the United States Department of
Transportation existing under the North Refinery and South Refinery within easements granted
by Sellers prior to Closing.

     (ix) Nothing in this Section 9.6(b) shall apply to ethers, alcohols or blended
hydrocarbons containing ethers or alcohols transported in any third party pipeline over
which neither Refinery Buyer nor Pipeline Buyer has direct or indirect control.

     (x) Refinery Buyer shall comply with all Laws regarding the storage, transport and
handling of ethers and alcohols.

     (c) Buyers shall provide CUSA or its designees with: (i) the exclusive right to negotiate
regulatory requirements relating to the Corrective Action activities; (ii) the exclusive
right to perform such regulatory requirements; and (iii) the necessary access pursuant to the
Easement Agreement to perform such activities.

     (d) In performing Corrective Action, CUSA, in its sole discretion, may follow the minimum
applicable legal requirements of Government Authorities having jurisdiction over such Corrective
Action. Corrective Action may include the use of any lawful risk assessment approach; the use of
deed restrictions or restrictive covenants; monitoring and natural attenuation; confinement (in
situ or otherwise); no action; or treatment. CUSA or its designees shall have control of all
matters relating to Corrective Action. CUSA or its designees shall retain all contractors and pay
all costs directly as incurred. Subject to such control, Buyers shall be kept advised by CUSA or
its designees of the planning, implementation and oversight of all Corrective Action. Buyers, at
their cost, may also reasonably inspect all stages of Corrective Action provided that such
inspection shall not interfere with or delay such work. Buyers shall consult with CUSA regarding
its positions with all government officials in relation to Corrective Action. Buyers agree that
they will not object to or comment upon any of the Corrective Action proposals or reports submitted
by CUSA or its designees to the TCEQ (except to the extent such communication is mandated by Law or
Applicable Permits). Further, Buyers agree that they will not orally or in writing communicate
with or respond to any Government Authority with respect to Corrective Action activities, other
than to refer the TCEQ to CUSA, without first obtaining CUSA’s written consent, which consent may
be arbitrarily withheld in CUSA’s sole discretion (except to the extent such communication is
mandated by Law or Applicable Permits). Any oral and/or written communication from a Government
Authority to any of the Buyers relating to Corrective Action shall promptly be disclosed to CUSA by
such Buyer. Buyers shall take no action to interfere with or delay or increase the amount or cost
of Corrective Action responsibilities. As provided in the Option Agreement, any material default by
Buyers of the provisions of this Section 9.6(d) shall result in a termination of the Refinery
Buyer’s option to purchase the CUSA-Retained Option Property.

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     (e) If Refinery Buyer materially breaches any of its obligations under this Section 9.6,
Sellers may bring an arbitration action pursuant to Section 12.6 and shall be entitled to
injunctive relief whereby Buyers could be directed to comply with their obligations under Section
9.6. If Buyers fail to comply with such injunctive relief, the arbitral panel shall retain
jurisdiction to assess such failure and to impose whatever remedies may be equitable and
appropriate.

     (f) Refinery Buyer will not operate any injection well or water production well (whether
existing at Closing or installed after Closing) on any of the Refinery Buyer Properties in a manner
that will contaminate the Hueco Bolson aquifer. This section 9.6(f) does not restrict the Buyer in
any manner from evaluating existing water production wells, making any necessary repairs and
continuing to operate such existing water production wells post-Closing in a manner which will not
contaminate the Hueco Bolson aquifer.

9.7 Transition Services Agreement. Effective on the Closing Date, Sellers and Buyers shall enter
into a Transition Services Agreement for the provision of administrative and operational services
by Sellers and their Affiliates to Buyers and their Affiliates during a transition period
commencing on the Closing
Date. The transition period shall be a maximum of one year for SCADA system operational services
and for all other services shall be a maximum of six (6) months; provided that such periods may be
extended by mutual agreement of Sellers and Buyers to up to one (1) year from the Closing Date. The
Transition Services Agreement shall be substantially in the form of Exhibit I attached
hereto.

9.8 Right of First Refusal and Option Agreements. Effective on the Closing Date, CUSA and
Refinery Buyer shall enter into and acknowledge a Right of First Refusal Agreement — Southwest
Asphalt Business for Refinery Buyer to have the preemptive right to purchase CUSA’s Southwest
Asphalt Business (as defined in such agreement), including the El Paso Asphalt Plant in the event
that CUSA elects to sell such property, such agreement being substantially in the form of
Exhibit J attached hereto. Effective on the Closing Date, CPL and Pipeline Buyer shall
enter into and acknowledge a Right of First Refusal Agreement — Crude Pipelines for CPL to have the
preemptive right to purchase the Crude Pipelines in the event that Pipeline Buyer elects to sell
such property, such agreement being substantially in the form of Exhibit K attached hereto.
Effective on the Closing Date, CUSA and Refinery Buyer shall enter into and acknowledge an Option
Agreement governing the potential conveyance subsequent to the Closing Date from CUSA to Refinery
Buyer of specified portions of the CUSA-Retained Option Property, such agreement being
substantially in the form of Exhibit L attached hereto.

9.9 Product Sales Agreement. Effective on the Closing Date, Refinery Buyer and CUSA shall enter
into a Product Sales Agreement for the supply by Refinery Buyer to CUSA of motor gasoline, low
sulfur diesel fuel and other products for an initial term of five (5) years. The Product Sales
Agreement shall be substantially in the form of Exhibit M attached hereto.

9.10 Residuum Supply Agreement. Effective on the Closing Date, Refinery Buyer and CUSA shall enter
into a Residuum Supply Agreement for the supply by Refinery Buyer to the El Paso Asphalt Plant of
residuum for an initial term of two and one-half (2.5) years. The Residuum Supply Agreement shall
be substantially in the form of Exhibit N attached hereto.

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9.11 Operational Services Agreement. Effective on the Closing Date, Buyers and Sellers shall enter
into an Operational Services Agreement for the provision by Buyers to Sellers of steam, handling of
storm water, remediation water and process water, and other products or services required or
generated in connection with Sellers’ conduct of environmental remediation activities and Sellers’
operation of their retained properties for an initial term of twenty (20) years. The Operational
Services Agreement shall be substantially in the form of Exhibit O attached hereto.

9.12 Termination of Operating Agreement. Effective on the Closing Date, CUSA and Refinery Buyer shall enter into a Termination of
Operating Agreement for termination of CUSA’s operation of the South Refinery and release of
obligations and liabilities of each of CUSA and Refinery Buyer in consideration of the obligations
and liabilities undertaken by each of the Parties in this Agreement. The Termination of Operating
Agreement shall be substantially in the form of Exhibit P attached hereto.

9.13 Product Pipeline Shipping History Notifications. Prior to the Closing Date, CUSA shall
provide notifications to SFPP, L.P. and CPL in the form of the letters attached as Exhibit
Q.

9.14 Connection Agreements with Products Pipelines. Effective on the Closing Date, CPL and Refinery
Buyer shall enter into Connection Agreements relating to certain CPL products pipelines. The
Connection Agreements shall be substantially in the form of Exhibits R-1 and R-2 attached
hereto.

9.15 Loaned Employee Agreement. Effective on the Closing Date, CUSA and Buyers shall enter into a
Loaned Employee Agreement governing the seconding to Buyers of certain CUSA employees who are not
Prospective Employees for a term of six (6) months. The Loaned Employee Agreement shall be
substantially in the form of Exhibit S attached hereto.

9.16 Remediation Hydrocarbon Sales Agreement. Effective on the Closing Date, CUSA and Pipeline
Buyer shall enter into a Remediation Hydrocarbon Sales Agreement in the form of Exhibit T
attached hereto for sale and purchase of recovered products generated from Sellers’ remediation
activities.

9.17 Technology Agreement. Effective on the Closing Date, Sellers and Buyers shall enter into a
Technology Agreement for transfer of interests in certain ChevronTexaco and third-party technology.
The Technology Agreement shall be substantially in the form of Exhibit U attached hereto.

9.18 Rotor Use Agreement. Effective on the Closing Date, CUSA and Refinery Buyer shall enter into
a Rotor Use Agreement in the form of Exhibit V attached hereto.

9.19 Pipeline Repair Covenants. Not later than three (3) months after the Closing Date, Pipeline
Buyer shall, at its sole expense, cause PII Pipeline Solutions (“PII”) to complete the
smart-pigging of the Sharon Ridge and the Guadalupe Pass-El Paso segments of the CPL Properties,
using the PII Magnetic Flux Leakage High Resolution MFL) technique. CPL shall reimburse Pipeline
Buyer for fifty percent (50%) of up to Eight Hundred Thousand Dollars ($800,000) of qualifying
out-of-pocket costs (as defined
in the last sentence of this Section 9.19) actually incurred by Pipeline Buyer within twelve (12)
months following the Closing Date in performing repairs on the Sharon Ridge and the Guadalupe
Pass-El Paso segments identified in

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the PII work referred to above, to the extent that such repairs
are required to address line pipe corrosion, and provided that CPL shall have been given access to
the results of the PII work prior to repairs being made and reasonable advance notice of and the
opportunity to be present to observe any such repairs. Such reimbursement shall be made promptly
following submission to CPL of reasonable supporting documentation therefor. The portion of the
repair costs qualifying for reimbursement by CPL shall be those required in accordance with DOT 49
CFR 195 to cause the Sharon Ridge segment to operate at a pressure of 1125 pounds per square inch
and the Guadalupe Pass-El Paso segment to operate at a pressure of 814 pounds per square inch.

9.20 Pipeline Remediation Covenants. To the extent required by Laws and applicable industry
practice, CPL shall pay for and cause to be performed the work required for investigation and
remediation of impacts of the Snyder release on August 24, 2000, the Guadalupe Milepost 105 release
on February 12, 2003, the North Reeves release on March 17, 2003, the Sharon Ridge MP 2.7 release
on September 17, 1999, the Cordona Lake Station release on February 14, 2002, the Mason Station
release on January 5, 2003, the Milepost 13 release of unknown date, the North Snyder Station
release on April 24, 2003 and the Plains Tank Farm release on April 14, 2003, provided that: 1)
Pipeline Buyer, either directly or indirectly, has not engaged in any soil sampling/analysis,
groundwater sampling/analysis, or other investigation activities in, on, or around the relevant
release site in excess of that required by Laws and Applicable Permits, or engaged in any
discussions with any Government Authority in excess of that required by Laws and Applicable
Permits, 2) no reportable release has occurred in, on, or around the relevant release site
subsequent to either the Closing Date or the date upon which CPL provides Pipeline Buyer with
confirmation sampling test results indicating that the soils remaining at the release site are less
than 1% TPH, whichever occurs later, 3) CPL is provided the right to conduct any work related to
the cleanup of such releases, 4) CPL is provided the exclusive right to negotiate any regulatory
requirements, and 5) CPL is provided the necessary access under the Easement Agreement to perform
such work.

9.21 Cooperation in Filing Environmental Compliance Reports. Buyers and Sellers acknowledge that
certain environmental compliance reports, including clean fuel compliance reports addressed in
Section 9.23, will have to be filed after the Closing Date. Sellers shall prepare at their expense
and file with the appropriate Government Authorities partial reports, covering the period January
1, 2003 through the Closing Date, for all periodic environmental reports due in 2003 and 2004 for
the Transferred Properties. If any Government Authority will not accept any such partial reports,
Buyers and Sellers will work cooperatively together to file a joint report each being responsible
for the portion of the joint report covering their respective ownership in 2003 of the Transferred
Properties. Buyers shall cause all environmental compliance reports due after the Closing Date for
the Transferred Properties to be filed with the appropriate Government Authorities. Each Party
shall cooperate as reasonably requested by the other Parties by providing information in its
possession necessary for filing said reports after the Closing Date.

9.22 Cooperation in Obtaining Security. Buyers shall cooperate with Sellers in Sellers’ efforts to
obtain insurance, surety bonds or other financial instrument(s) as security for the performance of
Buyers’ obligations proposed under this Agreement, including providing third parties with Buyers’
audited financials, business plans and other confidential business information subject to
reasonable confidentiality restrictions.

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9.23 Cooperation in Filing Clean Fuel Compliance Report. If compliance with EPA’s gasoline
regulations can be demonstrated separately, CUSA and Refinery Buyer will, at their own expense and
effort, file separate reports covering their respective periods of operation of the North and South
Refineries during 2003. If compliance cannot be demonstrated separately, Refinery Buyer is
authorized to file a single report, and both CUSA and Refinery Buyer agree to jointly prepare the
report, to share expenses thereof and to fully share all relevant information regarding the
gasoline shipped from the North and South Refineries during 2003. Such information will include
both the volume and quality of the gasoline shipped.

9.24 Mechanisms for Implementing Sellers’ Environmental Obligations. Sellers may elect to perform
any of their respective environmental obligations under this Agreement, including but not limited
to those obligations set forth in Sections 3.1(c), 3.1(d)(vii), 3.1(g)(vii), 9.4 or 9.5(a), (b),
(c) and (e), though consultants, contractors, insurers, agents, Affiliates, risk management
entities and other third parties that Sellers may individually or collectively choose. Sellers’ use
of such consultants, contractors, insurers, agents, Affiliates, risk management entities and other
third parties shall not relieve Buyers of any of their obligations under this Agreement, including
but not limited to Buyers’ obligations under Section 9.6.

9.25 South Refinery PLL Insurance Policy. Buyers shall enforce rights of all insureds under and
maintain the South Refinery PLL Insurance Policy in full force and effect. Without limiting the
foregoing, Buyers shall not commute or otherwise terminate or reduce coverage under such policy
without CUSA’s prior written consent.

9.26 Success Sharing Agreement. Effective on the Closing Date, Sellers and Buyers shall enter into
a letter agreement regarding Sellers’ bonus program in the form of Exhibit Y attached
hereto.

9.27 Guaranty and Undertaking Letters. Effective on the Closing Date, Refinery Buyer shall
execute, and cause its Affiliates to execute, the Guaranty substantially in the form of Exhibit
W hereto; (ii) cause Paul Foster to execute and deliver to Sellers the Foster Undertaking
Letter in the form of Exhibit X-1 to this Agreement; (iii) cause the applicable trusts
involved in the Buyers’ financing to execute the Undertaking Letters in the form of Exhibits
X-2 and X-3 hereto.

9.28 Aceituno Litigation. In the event that the settlement agreement reached between the Refinery
Buyer and the Aceituno Litigation plaintiffs in or around June 2000 is not consummated, Refinery
Buyer and CUSA agree to meet promptly and attempt, in good faith, to reach a mutually beneficial
agreement related to the defense of, and allocation of liability with respect to, the Aceituno
Litigation (which litigation is more specifically described on Schedule 12 hereto).

ARTICLE 10

TAXES

10.1 Transfer Taxes. Any recording fees, transfer taxes and other charges imposed on the
conveyance of the Transferred Properties by any governmental body shall be promptly paid by

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Buyers
(or reimbursed to Sellers by Buyers within five Business Days after demand therefor) in accordance
with the Law or Government Authority levying such tax or fee.

10.2 Property and Excise Taxes.

     (a) All ad valorem property taxes for the current year, including but not limited to the real
estate, fixtures, personal property and inventory shall be prorated between Buyers and Sellers as
of the Closing Date. Sellers shall be responsible for all such taxes for all periods prior to the
Closing Date. Buyers shall be responsible for the payment of all such taxes for all periods on or
subsequent to the Closing Date. If such taxes are prorated at the time of Closing, pursuant to
Section 4.3(v), and based on an estimate of the current year taxes, there shall be a final
settlement between Buyers and Sellers based on the actual taxes due for the year. Any refunds or
rebates that may be received for the current year shall be prorated between Buyers or Sellers as of
the Closing Date and Seller shall be entitled to all refunds and rebates that may be received for
prior years. Any refunds or rebates will be paid to the applicable Parties within thirty (30) days
of receiving the refund or rebate.

     (b) Buyers shall be responsible for all sales, use and similar taxes arising out of the sale
of the Transferred Properties. On the Closing Date, Buyers shall pay Sellers all state and local
sales or use taxes determined by Buyers’ independent accounting firm, Ernst & Young, to be
applicable, and Sellers shall remit such amount to the appropriate taxing authority in accordance
with applicable law; provided, however, that if Buyers hold a direct payment permit which is valid
on the Closing Date, Buyers shall assume all responsibility for remitting to the appropriate taxing
authority the state and local sales and use taxes due and shall provide Sellers with any exemption
certificates or other documentation required under applicable Law in lieu of paying Sellers such
taxes due. Buyers shall, in accordance with their respective interests, severally and not jointly,
indemnify, defend and hold harmless Sellers against any sales or use taxes assessed against Sellers
by any taxing authority in respect of this sale including the amounts of any penalties, interest
and attorney’s fees.

     (c) In the event that the transferor or transferee of any of the Transferred Properties
receives a notice of liability for additional Taxes or charges (the Party receiving such notice of
liability will hereafter be referred to as the liable party) which are assessed upon or levied
against any of the Transferred Properties after the Closing Date with respect to any period for
which the liable party is not responsible for payment under the above terms then the other Party
(being the transferee or transferor, respectively) (hereafter referred to as the responsible party)
after receiving such notice of liability shall have the option of either:

     (i) Paying the Tax directly, including payment under protest to preserve the right to
contest the liability, or

     (ii) Challenging the liability asserted in such notice, taking all action necessary and
incident to such challenge. If the responsible party elects to challenge the validity of
such bill or any portion thereof, the liable party shall extend reasonable cooperation to
the responsible party in such efforts at no expense to the responsible party.

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Notwithstanding the foregoing, the liable party may elect to pay such notice of liability; however,
the responsible party will not have to reimburse such payment unless the responsible party has
consented to that payment and reimbursement and the responsible party’s right to contest such
liability is preserved.

     (d) The Parties believe and intend that the purchase and sale of assets covered by this
Agreement constitutes an isolated or occasional sale as defined in Texas Tax Code Section 151.304.
In connection therewith, Sellers represent that the sale pursuant to this Agreement constitutes a
sale of the entire operating assets of a separate division, branch or identifiable segment of a
business, and that the income and expenses attributable thereto can be separately established from
the books of account or record. For these purposes, “operating assets” means tangible personal
property used exclusively by the enterprise in providing the product or service but does not mean
tangible personal property maintained and used both for general business purposes and by the
specific enterprise, and “operating assets” excludes inventory and intangible property. Should this
purchase and sale constitute an isolated or occasional sale and not be subject to sales or use tax
with any of the taxing authorities having jurisdiction over this transaction, no sales tax will be
collected by Sellers from Buyers at the Closing Date. Sellers agree to cooperate with Buyers in
demonstrating that the requirements for an isolated or occasional sale or any other sales tax
exemption have been met.

10.3 Tax-Deferred Exchange Option. Sellers shall have the right to elect to effect a tax deferred
exchange under Internal Revenue Code Section 1031 (a “Tax-Deferred Exchange”) for one or more of
the Transferred Properties at any time prior to the Closing Date, provided such election does not
and will not delay the Closing. If Sellers elect to effect a Tax-Deferred Exchange, Buyers agree to
execute additional escrow instructions, documents, agreements, or instruments to effect the
exchange, provided that Buyers shall incur no additional costs, expenses, fees or liabilities as a
result of or connected with the exchange. Sellers may assign any of their rights and delegate
performance of any of their duties under this Agreement in whole or in part to a third party in
order to effect such an exchange; provided that Sellers shall remain responsible to Buyers for the
full and prompt
performance of their respective delegated duties. Sellers shall indemnify and hold each Buyer and
their Affiliates harmless from and against any and all claims, expenses (including reasonable
attorney’s fees), loss and liability resulting from any exchange undertaken pursuant to this
Section 10.3.

10.4 Refunds. Other than Taxes covered in Section 10. 2, Sellers shall be entitled to any refund
of Taxes (associated with operations related to the assets and entities subject to this Agreement)
paid by Sellers to any governmental entity. Other than Taxes covered in Section 10.2, Buyers shall
be entitled to any refund of Taxes (associated with operations related to the assets and entities
subject to this Agreement) paid by Buyers to any governmental entity. The Party receiving a refund
shall make a good faith effort to ascertain the source of the refund and to resolve by mutual
consent the ownership of any refunds related to the subject properties.

10.5 Compliance and Contests. Subject to the reimbursement of reasonable out-of-pocket expenses,
the Parties will provide each other such records and assistance as may be reasonably requested by
any of them in connection with the preparation of any Tax Return, and audit or other examination by
any taxing authority, and any judicial and administrative proceedings

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related to the liability for
Taxes (including without limitation, any additions to or refund of Taxes).

ARTICLE 11

EMPLOYEES AND BENEFITS

11.1 Offers of Employment.

     (a) Sellers’ employees listed on Schedule 16 are the “Prospective Employees”. Buyers
shall offer employment with them to one hundred percent (100%) of all Prospective Employees who are
represented by the Refinery Union (the “Represented Employees”). Buyers shall also offer employment
to not less than eighty-five percent (85%) of the total Prospective Employees who are
non-Represented Employees. Buyers, however, shall not offer employment to any Prospective Employee
(none of which are Represented Employees) listed in Schedule 16 with an asterisk by his or
her name unless Buyers receive Sellers’ prior written consent to do so. Any Prospective Employee
with an asterisk by his or her name shall not be considered for purposes of determining whether
Buyers have made offers of employment to not less than eighty-five percent (85%) of the total
Prospective Employees who are non Represented Employees. For purposes of this Article 11,
references to “Sellers” shall include Sellers’ Affiliate where a Prospective Employee is employed
by such Affiliate no later than thirty-one (31) days prior to the Closing Date.

     (b) Buyers’ employment offers to Prospective Employees shall be made in writing during a
“hiring period” beginning on the Execution Date and ending two weeks prior to the scheduled Closing
Date. Buyers may require each Prospective Employee to submit a formal
application for employment and submit to Buyers’ customary hiring procedures. Each such
employment offer shall be for a position with Buyers at a salary or wage that is no less than the
base salary (or the base wage rate) plus any shift, incentive or piece-rate differentials
applicable with respect to such Prospective Employee on the Closing Date (“Equivalent Wage”).
Equivalent Wage shall not include the value of any benefit plan or program, including without
limitation, the ChevronTexaco Success Sharing Program and/or Management Incentive Plan, or any
other company incentive program in effect as of the Closing Date. Each such employment offer shall
also be for a position at a work location that is fifty (50) miles or less from the Prospective
Employee’s work location at the time of the offer.

     (c) Such employment offers shall provide that the employment with the Buyers shall commence on
the first day immediately following the Closing Date (“Hire Date”) and shall be conditioned upon
Closing. Notwithstanding the foregoing, Buyers shall have no obligation under this Agreement to
employ any Prospective Employee who accepts its employment offer but does not actively report for
work with Buyers on the Hire Date, unless (1) such Employee is on vacation, scheduled time off, or
other similar Sellers-approved absence and commences active work with Buyers upon the termination
of such approved absence; or (2) such Employee is absent from work due to illness or injury and
reports for active work with Buyers within thirty (30) days after the Hire Date.

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     (i) Any Prospective Employee selected by Buyers who has accepted his or her employment
offer but is on vacation, scheduled time off or on other Sellers-approved absence on the
Hire Date shall become the Buyers’ employee, as applicable, on the hire Date.

     (ii) Any Prospective Employee who accepts Buyers’ employment offer but is absent from
work due to illness or injury, and who reports for active work with Buyers within thirty
(30) days after the Hire Date, shall become the Buyers’ employee, as applicable, with effect
as of the Hire Date.

Any Prospective Employee who accepts Buyers’ offer for employment but who fails to report for work
in accordance with this Section 11.1(c) shall not become a Buyers’ employee for any purpose.

     (d) Sellers will terminate the employment of all Prospective Employees who accept Buyers’
employment offers on the Closing Date, provided Sellers will terminate the employment of any
Prospective Employee described in clause (c)(ii) above effective on the earlier of the day
immediately before reporting for work with Buyers or thirty (30) days after the Hire Date.
Prospective Employees who become Buyers’ employees as of the Hire Date (or, in the case of
Employees described in clause (c)(ii) above, within thirty (30) days after the Hire Date), are the
“Affected Employees.” Prospective Employees who do not become Affected Employees are “Remaining
Employees.”

     (e) Nothing in this Agreement shall affect Buyers’ right to terminate the employment of any
Affected Employee on or after the date he or she becomes Buyers’ employee, with or without cause;
provided that Buyers shall comply with the terms of the severance program required by Section 11.4
below if such termination is prior to one (1) year after the Hire Date.

     (f) Buyers shall control and be responsible for the process by which the Buyers offer
employment to Prospective Employees. Buyers may interview any Prospective Employee during normal
working hours (including interviews on site) consistent with the operating requirements of Sellers
and, with the written permission of the Prospective Employee (a copy of which written permission
shall be furnished to Buyers), may review and retain copies of such Prospective Employee’s
training, attendance and safety records (if any) maintained by Sellers. All of the original
personnel records maintained by Sellers relating to the Prospective Employees shall remain with
Sellers after the Closing Date and shall not be turned over to Buyers. Buyers shall, however, have
access to and use of such records as may be required in connection with the prosecution or defense
of any administrative or court claim, and Sellers shall not destroy any such records prior to the
time such records are scheduled for destruction pursuant to Sellers’ records retention policy
applicable to records of this type.

     (g) Buyers shall not reduce an Affected Employee’s salary (or wage rate) below the Affected
Employee’s Equivalent Wage prior to one (1) year after the Hire Date.

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11.2 Defined Benefit Pension Plans.

     (a) Sellers’ Pension Plan.

     (i) Sellers shall cause the ChevronTexaco Corporation Retirement Plan and related
excess benefit plan (“Sellers’ Pension Plan”) to:

     (A) retain the liability for pension benefits accrued by each Affected Employee
as of the date he or she terminates employment with Sellers;

     (B) provide for distributions in accordance with Sellers’ Pension Plan’s
distribution rules to any Affected Employee eligible for an immediate distribution
as of the date he or she terminates employment with Sellers. Sellers shall also
cause the Sellers’ Pension Plan to recognize the Affected Employee’s service with
the Buyers from the date such Affected Employee commences employment with the Buyer
until the earlier of the date the Affected Employee is no longer employed by Buyers
(including any entity within Buyers’ Controlled Group) or receives a distribution
from Sellers’ Pension Plan. The service described in the preceding sentence shall be
recognized by the Sellers’ Pension Plan only for purposes of vesting and determining
eligibility to receive a benefit (including, without limitation, eligibility to
receive subsidized early retirement benefits, Social Security supplements and
ancillary benefits), but not for the purpose of accruing additional benefits (i.e.,
pension credit). Such recognition of service for above described purposes, however,
is expressly conditioned on the Affected Employee’s not receiving a distribution
from Sellers’ Pension Plan prior to the date he is no longer employed by Buyers
(including any entity within Buyers’ Controlled Group).

     (ii) Upon reasonable request, Buyers, as applicable, shall provide Sellers as soon as
reasonably practical with information concerning each Affected Employee’s
service with the Buyers’ Controlled Group and the date when the Affected Employee is no
longer employed by Buyers (including any entity within Buyers’ Controlled Group).

     (b) Buyers’ Pension Plan.

     (i) No later than the Hire Date, Buyers shall establish and maintain, or make provision
for, a defined benefit pension plan that is qualified as soon as practicable following the
Closing Date under Section 401 of the Internal Revenue Code (“Buyers’ Pension Plan”).
Buyers’ Pension Plan shall not be amended in a manner inconsistent with this Section 11.2 or
terminated prior to one year after the Hire Date.

     (ii) Buyers shall cause the Buyers’ Pension Plan to provide that all Affected Employees
shall be immediately eligible to participate in Buyers’ Pension Plan upon commencement of
their employment with Buyers, as applicable.

     (iii) Buyers shall cause the Buyers’ Pension Plan to recognize each Affected Employee’s
service under the Sellers’ Pension Plan as of the date his or her employment with Sellers
terminates for purposes of vesting and determining eligibility to receive a

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benefit
(including, without limitation, eligibility to receive subsidized early retirement benefits,
Social Security supplements and ancillary benefits). Such service shall also be the service
used by Sellers’ Pension Plan for such purposes.

     (iv) Buyers shall also cause the Buyers’ Pension Plan to provide a “wraparound” benefit
for each Affected Employee. Such “wraparound” benefit will be determined as follows. Buyers
shall cause Buyers’ Pension Plan to accrue a benefit for each Affected Employee based on his
or her combined service with Sellers and Buyers (both including service with any entity
within their respective Controlled Groups). Such service shall be the service in the
respective Pension Plans used to calculate benefit accruals. Buyers shall then cause Buyers’
Pension Plan to offset the accrued benefit under the Sellers’ Pension Plan from the portion
of the Affected Employee’s accrued benefit in the Buyers’ Pension Plan that is attributable
to service before the termination of his or her employment with Sellers (both expressed in
the form of a single life annuity commencing at age 65).

As soon as reasonably practicable after the termination of each Affected Employee’s employment with
Sellers, Sellers shall provide Buyers with such Affected Employee’s service, compensation and
benefit payable under Sellers’ Pension Plan in the form of a single life annuity commencing at age
65.

11.3 Qualified Defined Contribution Plans.

     (a) Sellers shall cause the ChevronTexaco Employee Savings Investment Plan (“Sellers’ Defined
Contribution Plan”) to fully vest each Affected Employee as of the date his or her employment with
Sellers terminates, and to provide for the distribution of such Affected Employee’s vested benefits
in accordance with such plan’s distribution rules.

     (b) No later than the Hire Date, Buyers shall establish and maintain, or make provision for, a
defined contribution plan that is qualified as soon as practicable following the Closing Date under
Section 401 of the Internal Revenue Code (“Buyers’ Defined Contribution Plan”). Buyers’ Defined
Contribution Plan shall not be terminated prior to one year after the Hire Date. Buyers shall cause
the Buyers’ Defined Contribution Plan to recognize for purposes of participation eligibility,
vesting and benefit eligibility purposes each Affected Employees service for such purposes under
Sellers’ Defined Contribution Plan as of the’ date his or her employment with Sellers terminates.

     (c) Buyer shall cause the Buyers’ Defined Contribution Plan to accept the direct rollover of
Affected Employees’ benefit distributed from Sellers’ Defined Contribution Plan in cash and, where
the Affected Employee elects to roll over his entire eligible balance, any promissory notes not
accelerated (as provided in Internal Revenue Code Section 401(a)(31)). Any Affected Employee who
elects to roll over his or her entire eligible balance from Sellers’ Defined Contribution Plan to
Buyers’ Defined Contribution Plan may elect to include with the rollover any loans outstanding
under Sellers’ Defined Contribution Plans as of the date his or her employment with Sellers
terminates, provided the loans have not been accelerated at the time of the rollover.

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11.4 Severance Plans.

     (a) Sellers’ Severance Pay Plans. Sellers shall cause the execution of a severance pay
plan(s) for the benefit of qualifying Prospective Employees (“Sellers’ Severance Pay Plans”).
Prospective Employees will only receive severance pay in connection with the termination of their
employment with Sellers if they qualify for it under the terms of Sellers’ Severance Pay Plans.
Without limitation, Sellers’ Severance Pay Plans shall provide that a Prospective Employee is
ineligible for severance pay if he or she received an employment offer from Buyers at an Equivalent
Wage and at a work location within 50 miles of his or her work location with Sellers at the Closing
Date, regardless of whether such offer is accepted or rejected.. In addition, Sellers’ Severance
Pay Plans shall provide that no Affected Employee shall be eligible for severance pay.

     (b) Buyers’ Severance Program.

     (i) If within one year of the Hire Date (A) Buyers involuntarily terminates the
employment of an Affected Employee (for reasons other than cause or to commence employment
with another entity within Buyers’ Controlled Group), (B) the Affected Employee elects to
terminate employment with the Buyers (or another entity within Buyers’ Controlled Group)
rather than be required to transfer to a job location more than fifty (50) miles from his or
her current job location, or (C) the Affected Employee elects to terminate employment with
the Buyers (or another entity within the Buyers’ Controlled Group) rather than accept a
reduction in compensation below his or her Equivalent Wage (without regard to whether such
reduction in compensation would violate Section 11.1(g) of this Agreement), the Buyers shall
provide severance pay and other benefits to such Affected Employee as described below
(“Buyers’ Severance
Program”). Buyers agree to adopt such Buyers’ Severance Program no later than the Hire
Date and not to terminate it or amend it in a manner inconsistent with this Section 11.4(b)
prior to one year after the Hire Date.

     (ii) Buyers’ Severance Program shall provide severance pay in an amount no less than
two weeks of such Affected Employee’s Equivalent Wage (or his then-current base rate of pay,
if greater) for each combined year of service with Sellers and Buyers (each including any
other entity within its respective Controlled Group). Such service shall be prorated for
completed calendar months and subject to a minimum of four years and a maximum of twenty-six
(26) years. Service with Sellers for these purposes shall be Sellers’ service used to
calculate severance pay under Sellers’ Severance Pay Plan. Buyers’ Severance Program shall
also provide for the continuation of employee rates and Buyers’ contribution for medical
coverage that are applicable to similarly situated active Buyers employees for up to six
months after the Closing Date.

     (iii) As soon as reasonably practicable after the termination of each Affected
Employee’s employment with Sellers, Sellers shall provide Buyers with such Affected
Employee’s service (as defined in Sellers’ Severance Pay Plan).

     (iv) Notwithstanding the foregoing, Buyer may condition eligibility for any benefit
under Buyers’ Severance Program on the execution of a release or waiver of any

68

 

liability.
Such release or waiver shall be in such form as Buyers determine in their sole discretion.

11.5 Vacation Pay. Buyers shall adopt a vacation pay plan or policy no later than the Hire Date.
(“Buyers’ Vacation Pay Policy”). Buyers’ Vacation Pay Policy shall:

     (i) be applicable to each Affected Employee upon the commencement of his or her
employment with Buyers, as applicable;

     (ii) recognize the service that Sellers used for purposes of vacation pay accrual as of
the date each Affected Employee terminates employment with Sellers; and

     (iii) recognize all earned and unused vacation for 2003 of each Affected Employee as of
the date each Affected Employee terminates employment with Sellers (Sellers shall be
responsible for any compensation due to Affected Employees for any vacation carryover not
used prior to the Closing Date); and

     (iv) provide a minimum annual vacation pay accrual equal to the ChevronTexaco Vacation
Policy (non-Represented Employees) or specified in the collective bargaining agreement
between CUSA and the Refinery Union (Represented Employees), as applicable.

Notwithstanding the foregoing, such minimum annual accrual may be prorated where the Affected
Employee is employed by the Buyers (including other entities within Buyers’ Controlled Group) for
less than a full calendar year.

11.6 Health Care Plans.

     (a) In General. Buyers shall establish and maintain, or make provision for, medical, mental
health, substance abuse, and dental plans (“Buyers’ Health Care Plans”) as of the Hire Date.
Buyers’ Health Care Plans shall provide that each Affected Employee and his or her eligible
dependents, as prescribed by applicable employment law, shall be eligible to enroll in such plans
with coverage commencing immediately upon commencement of his or her employment with Buyers, as
applicable. If such Affected Employee was enrolled in Sellers’ corresponding plan upon termination
of Sellers’ employment, Buyers shall cause Buyers’ Health Care Plans to: (i) waive any pre-existing
condition limitations; and (ii) recognize each such Affected Employee’s expenditures (including
those of his covered dependents) under Sellers’ corresponding plan for the calendar year in which
the Affected Employee becomes Buyers’ employee, as applicable, toward any applicable deductible and
annual out-of-pocket limit in Buyers’ Health Care Plans for such calendar year. In addition, Buyers
will cause Buyers’ Health Care Plans to waive any pre-existing condition limitation where required
to comply with the provisions of the Health Insurance Portability and Accountability Act of 1996
(“HIPAA”). Sellers’ benefit plans that provide medical, mental health, substance abuse, and dental
coverage (“Sellers’ Health Care Plans”) shall be liable for the following expenses of the Affected
Employees and their dependents to the extent such individuals have coverage under such plans and
such expenses are covered under the terms of such plans (“Covered Expenses”):

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     (i) Covered Expenses incurred before the date the Affected Employee becomes an employee
of Buyers, as applicable; and

     (ii) Covered Expenses incurred within six (6) months after the date they terminate
employment with Sellers that relate to a condition that caused the employee or covered
dependent to be totally disabled as of that date as determined under the terms of the
applicable Sellers’ plan.

     (b) Special Rules for Flexible Spending Account. The Parties agree to coordinate the
transition of the Sellers’ health care flexible spending account plan with respect to Affected
Employees as described in Situation 1 of Internal Revenue Service Revenue Ruling 2002-32.
Accordingly, Sellers agree to cause the ChevronTexaco Health Care Program to permit the continued
participation of Affected Employees without an additional contribution for the remainder of the
calendar year including the Hire Date. Buyers agree to establish and maintain or make provision
for, the establishment of a health care flexible spending account plan applicable to Affected
Employees and that the election by any Affected Employee under the ChevronTexaco Health Care
Program shall be continued as an election as if made under the Buyers’ health care flexible
spending account. All benefits for the remainder of that calendar year will be paid by the
ChevronTexaco Health Care Plan and not from the Buyers’ health care flexible spending account plan.
In consideration of Affected Employees being able to participate in the ChevronTexaco Health Care
Program for the remainder of that calendar year, Buyers will remit to Sellers all periodic salary
reductions made by Affected Employees in Buyers’ health care flexible spending account plan after
the Hire Date and during the remainder of the calendar year no later than five days after the month
in which such salary reduction occurs.

11.7 Post Retirement Welfare Benefits.

     (a) Sellers’ Post-Retirement Health Care Coverage. Sellers shall be responsible for all
post-retirement medical, mental health, substance abuse, and dental coverage for the Remaining
Employees (“Sellers’ Post-Retirement Health Care Coverage”). Sellers also shall make available
Post-Retirement Health Care Coverage to any Affected Employee who as of the date he or she
terminates employment with Sellers is eligible to receive and enroll in Sellers’ Post-Retirement
Health Care Coverage (“Eligible Affected Employees”). Eligible Affected Employees shall be treated
in the same manner as any other similarly situated Sellers’ employees who would terminate
employment with Sellers. For purposes of calculating the amount of any Company contributions toward
such coverage, Sellers shall not be obligated to consider any age greater than the Affected
Employee’s age upon termination of employment with Sellers or any service with Buyers.
Notwithstanding the foregoing, Sellers’ Post Retirement Health Care Coverage shall be subject to
Sellers’ unilateral and discretionary right (including the rights of any entity within Sellers’
Controlled Group) to amend or terminate such coverage at any time and with respect to any Eligible
Affected Employees.

     (b) Buyers’ Post Retirement Health Care Coverage. Buyers shall establish and maintain, or
make provision for, as of the Hire Date post-retirement medical, mental health, substance abuse,
and dental coverage in Buyers’ Health Care Plans for eligible pre-age 65 former employees (“Buyers’
Post-Retirement Health Care Coverage”). Affected Employees shall be eligible to qualify for Buyer’
Post-Retirement Health Care Coverage on a basis no less favorable

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than that applicable to Buyers’
non-Affected Employee employees. In meeting any service requirement for Buyers’ Post-Retirement
Health Care Coverage, Buyers shall recognize all service with the Sellers used by it for purposes
of qualifying for Sellers’ Post-Retirement Health Care Coverage as of the date such Affected
Employee terminates employment with Sellers. As soon as reasonably practicable after the Closing
Date, Sellers shall provide Buyers with such Affected Employee’s service as of the Closing Date it
uses to determine qualification for Sellers’ Post-Retirement Health Care Coverage.

11.8 WARN Act Indemnification. Buyers shall indemnify Sellers from all liabilities arising out of
the notification or other requirements of the Worker Adjustment and Retraining Notification Act of
1988, as amended (“WARN Act”), with respect to the Affected Employees in connection with actions
taken by Buyers on the Closing Date. Sellers shall indemnify Buyers against all liabilities under
the WARN Act with respect to all other employees of Sellers, including the Remaining Employees.

11.9 Buyers’ Other Employee Benefits. Buyers agree that as of the date an Affected Employee
becomes Buyers’ employee, he or she will be eligible to participate in Buyers’ employee benefit
plans and programs that are not specifically described in this Article 11 which are generally
applicable to Buyers’ non-Affected Employee employees (or, at the time he or she may retire, will
be eligible to participate in the retiree employee benefit plans and programs for which he or she
qualifies based upon his or her
age and service and which are generally applicable to similarly situated retirees of Buyers), and
that each Affected Employee shall be given credit for the corresponding service recognized by
Sellers prior to the date he or she terminates employment with the Sellers for all applicable
purposes (including participation eligibility, vesting, benefit eligibility and benefit accrual)
under Buyers’ employee benefit plans and programs, whether in effect on the Hire Date or
subsequently established by Buyers. In addition, if the Affected Employee (or his covered
dependent) was participating in the Sellers’ similar employee welfare benefit plan as of the date
his or her employment with the Seller terminates, Buyers will cause such Buyers’ employee welfare
benefit plan to waive any and all restrictions relating to pre-existing conditions and evidence of
insurability. For purposes of such waiver, if Sellers had no similar employee welfare benefit plan,
Buyers will presume participation and satisfaction of pre-existing condition limitations on the
part of the Affected Employee (or his covered dependents).

11.10 General Employee Provisions.

     (a) Sellers and Buyers shall give any notices required by law and take whatever other actions
with respect to the plans, programs and policies described in this Article 11 as may be necessary
to carry out the arrangements described in this Article 11.

     (b) Sellers and Buyers shall provide each other with such plan documents and descriptions,
employee data or other information as may be reasonably required to carry out the arrangements
described in this Article 11.

     (c) If any of the arrangements described in this Article 11 are determined by the Internal
Revenue Service or other applicable Government Authority, or by a court of competent jurisdiction,
to be prohibited by law, Sellers and Buyers shall modify such arrangements to (as

71

 

closely as
possible) retain the intent and economic benefits and burdens of the parties as reflected herein in
a manner which is not prohibited by law.

     (d) In the event that Buyers hire any Remaining Employee within six months after he or she
terminates Sellers’ employment, Buyers will notify Sellers of such event and shall reimburse
Sellers for any severance pay paid by Sellers to such Remaining Employee within three business days
after the date they are employed by Buyers.

     (e) Notwithstanding anything to the contrary in this Article 11, the Parties’ obligations
under this Article 11 with respect to Represented Employees shall be subject to Buyers’ successful
negotiations of the terms and conditions described herein with the Refinery Union. With respect to
the negotiation of any such applicable collective bargaining agreement, Buyers agree to offer to
the Refinery Union representing any Represented Employee, the terms and conditions of employment as
described in this Article 11. Buyers further agree to assume the collective bargaining agreement as
listed in Schedule 4 hereto between CUSA and the Refinery Union representing any
Represented Employee who becomes an Affected Employee.

     (f) Buyers agree that Sellers shall assign to Buyers and Buyers shall accept and assume as of
the date the Affected Employee terminates employment with Sellers any outstanding loan that Sellers
may have made to Affected Employees. In exchange for such
assignment and assumption, Buyers shall, on the day of such assignment, transfer to Sellers an
amount equal to the then outstanding amount of principal due under such loans. Any such loans
outstanding as of the date hereof are listed on Schedule 21 hereto.

ARTICLE 12

GENERAL TERMS

12.1 Costs and Expenses. Buyers shall pay the cost of any title insurance acquired on any of the
Transferred Properties. Sellers shall pay for all survey and replatting expenses. In addition,
Buyers shall pay all HSR Act and other filing fees, costs of assignments of Applicable Contracts
and Applicable Permits and costs of recording required in connection with the Closing. Each Party
shall pay its own attorneys’ fees and other expenses related to the preparation and execution of
this Agreement.

12.2 Bulk Transfer Law. Each Buyer waives compliance with the provisions of any applicable bulk
sales or bulk transfers Law. Sellers shall indemnify and hold Buyers harmless from any claims, loss
or liability incurred by Buyers as a result of the failure to so comply; provided, however, such
indemnity shall not apply to obligations and liabilities assumed by Buyers.

12.3 Further Assurances. Sellers and Buyers will cause to be executed and delivered from time to
time at the request of the other Parties all such further instruments of conveyance, assignments
and further assurances as reasonably may be required to transfer and assign the Sellers’ interest
in the Transferred Properties or otherwise to implement the provisions and intent of this
Agreement, including any further documentation that may be necessary to preserve the rights and
obligations of the Parties under this Agreement in connection with any financing structure
implemented by Buyers.

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12.4 Notices. All notices and other communications required or permitted to be given or delivered
hereunder shall be in writing and shall be delivered personally, transmitted by facsimile with
answer back confirmed or sent by recognized overnight courier service or United States mail,
postage prepaid and return receipt requested, directed to the Party intended at the address set
forth below, or at such other address as may be designated by such Party by notice given to the
other Party in the manner aforesaid, and shall be effective upon receipt:

	 	 	 
	If to Sellers:	 	If to Buyers:
	 
	 	 
	Chevron Products Company

	 	Western Refining Company, L.P.
	6001 Bollinger Canyon Road Building T, 4th Floor

	 	Kaston Pipeline Company, L.P.
	San Ramon, California 94583

	 	6500 Trowbridge Drive
	Attention: Vice President & General Counsel

	 	El Paso, Texas 79905
	Facsimile: (925) 842-5060

	 	Attention: President
	 

	 	Facsimile: (915) 881-0002
	 
	 	 
	With a copy to:
	 	 
	 
	 	 
	Chevron Pipe Line Company
	 	 
	2811 Hayes Road
	 	 
	Houston, Texas 77082
	 	 
	Attention: Vice President & General Counsel
	 	 
	Facsimile: (281) 596-3619
	 	 

12.5 Assignment. No Party may assign any right granted it under this Agreement or delegate
performance of any duty to be performed by it hereunder without the express written consent of the
other Parties, which consent shall not be unreasonably withheld. Notwithstanding the foregoing, any
Party may assign its rights or delegate performance of its duties to its Affiliate effective upon
notice thereof to the other Parties (provided that, in the case of assignment or delegation by
either Buyer, the recipient either is a party to the Guaranty Agreement referenced in Section
6.1(u) or provides Sellers with an undertaking to assume the duties of Buyer hereunder in
proportion to the rights or duties assigned or delegated). Further, except as expressly consented
to by Sellers in their sole discretion, Buyer shall not transfer any material interest in the real
property or fixed assets included in the Transferred Properties without the transferee’s providing
Sellers with an undertaking assuming the duties of Buyer hereunder in proportion to the applicable
interest transferred. Subject to the foregoing, all rights and duties of each Party hereunder shall
inure to the benefit of and be binding upon its successors and assigns.

12.6 Governing Law and Dispute Resolution. The interpretation and enforcement of this Agreement,
and any arbitration and arbitral decision pursuant to clause (b) below, shall be governed by the
substantive law of the State of Texas, without the application of its conflict of law rules;
provided, however, questions concerning arbitrability under the dispute resolution provision hereof
shall be governed exclusively by the United States Arbitration Act.

     (a) The Parties desire to avoid all forms of traditional litigation and therefore agree,
except as otherwise specifically set forth in this Agreement, that all disputes, controversies or
claims arising out of or relating to this Agreement (collectively “Disputes”) shall be resolved in
accordance with the following procedures:

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     (i) The Parties shall use commercially reasonable efforts to resolve Disputes through
direct discussions. The management of each Party commits itself to respond promptly to any
communications concerning Disputes.

     (ii) Within fifteen (15) days of written notice that there is a Dispute,
representatives of the Parties with authority to settle the matter shall meet at a mutually
acceptable time and place in Houston, Texas, or such other location as may be agreed, and as
often thereafter as they deem reasonably necessary in an effort to reach an amicable
resolution. If a negotiator intends to be accompanied at a meeting by an attorney, the other
negotiator shall be given at least three (3) Business Days’ notice of such intention and may
also be accompanied by an attorney.

     (iii) If no amicable resolution or settlement is reached as a result of the procedures
in subparagraph (i) or (ii) herein, the Dispute shall be finally resolved through binding
arbitration which shall be conducted expeditiously. The Parties and arbitration panel shall
endeavor to complete the arbitration process within one hundred twenty (120) days of the
first status conference before the arbitrator(s). Unless otherwise agreed to by the Parties,
such arbitration shall be conducted in accordance with the Commercial Arbitration Rules of
the American Arbitration Association (the “Rules”), with Sellers collectively being
considered one “party” for purposes of the Rules and the Buyers collectively being
considered one “party” for purposes of the Rules.

     (A) For disputes involving an amount in controversy of less than Five Million
Dollars ($5,000,000), the arbitration shall be conducted by a single arbitrator. For
disputes involving a greater amount in controversy, the arbitration shall be
conducted by a panel of three (3) arbitrators. Each side shall be permitted to
nominate one arbitrator and the two Party-nominated arbitrators shall confer and
attempt to agree on a suitable chair for the arbitration panel within five (5)
Business Days or such other time as the Parties may agree. If the two
Party-nominated arbitrators are unable to agree on a third arbitrator, or if any
Party fails to nominate an arbitrator as herein provided, the arbitrators shall be
appointed in accordance with the Rules. In any event, all arbitrators appointed
hereunder shall have expertise relevant to the matter under dispute.

     (B) Unless the Parties agree otherwise, the place of arbitration shall be
Houston, Texas. The arbitrators shall. not be empowered to award any form of
exemplary or punitive damages. As part of any arbitral award pursuant to this
paragraph, the arbitrators shall render a reasoned award. The Parties consent to
judgment on such award being entered in any court having jurisdiction.

     (b) The dispute resolution proceedings contemplated by this provision shall be as confidential
and private as permitted by Law or the rules of any applicable securities exchange. To that end,
the Parties shall not disclose the existence, content or results of any proceedings conducted in
accordance with this provision, and materials prepared or submitted in connection with such
proceedings shall not be admissible in any other proceeding, provided, however, that this
confidentiality provision shall not prevent a petition to vacate or enforce an arbitral award, and
shall not bar disclosures required by Law or the rules of any applicable securities exchange.

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The Parties agree that any decision or award resulting from proceedings in accordance with
this dispute resolution provision shall have no preclusive effect in any other matter involving
third parties.

     (c) Should any Party institute any arbitration (or court proceeding, to the extent permitted)
under this Section 12.6 to enforce any provision hereof or for damages by reason of the breach,
default or liability of the other Party arising out of any provision of this Agreement or
otherwise, the prevailing Party (as determined by the arbitral panel or court) shall be entitled to
recover costs of the arbitration or court proceeding and reasonable attorneys’ fees to be fixed by
the arbitral panel or court.

     (d) Each Party is required to continue to perform its obligations under this Agreement pending
final resolution of any Dispute.

     (e) Any judicial proceedings permitted to be brought-with respect to this Agreement shall be
brought in any state or federal court of competent jurisdiction in the State of Texas, and the
Parties generally and unconditionally accept the exclusive jurisdiction of such courts. The Parties
waive, to. the fullest extent permitted by applicable law, any objection which they may now or
hereafter have to the bringing of any such action or proceeding in such jurisdiction.

BINDING ARBITRATION

NOTICE: BY INITIALING IN THE SPACE PROVIDED BELOW YOU ARE AGREEING TO HAVE ANY
DISPUTE RELATING TO OR ARISING OUT OF THE MATTERS INCLUDED IN THE “GOVERNING LAW AND
DISPUTE RESOLUTION PROVISION DECIDED BY NEUTRAL ARBITRATION AS PROVIDED BY TEXAS LAW
AND YOU ARE GIVING UP ANY RIGHTS YOU MIGHT POSSESS TO HAVE THE DISPUTE LITIGATED IN
A COURT OR JURY TRIAL. BY INITIALING IN THE SPACE PROVIDED BELOW YOU ARE GIVING UP
YOUR JUDICIAL RIGHTS TO DISCOVERY AND APPEAL, UNLESS THOSE RIGHTS ARE SPECIFICALLY
INCLUDED IN THIS PROVISION. IF YOU REFUSE TO SUBMIT TO ARBITRATION AFTER AGREEING TO
THIS PROVISION, YOU MAY BE COMPELLED TO ARBITRATE UNDER THE AUTHORITY OF THE LAWS OF
THE STATE OF TEXAS. YOUR AGREEMENT TO THIS ARBITRATION PROVISION IS VOLUNTARY.

WE HAVE READ AND UNDERSTAND THE FOREGOING AND AGREE TO SUBMIT DISPUTES ARISING OUT
OF THE MATTERS INCLUDED IN THE “GOVERNING LAW AND DISPUTE RESOLUTION” PROVISION TO
NEUTRAL ARBITRATION.

CUSA                      REFINERY BUYER                      CPL                      PIPELINE BUYER                     

12.7 Entire Agreement and Modifications.

     (a) This Agreement, together with all Schedules and Exhibits attached hereto, constitutes the
entire agreement between Sellers and Buyers with respect to the subject matter

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hereof, superseding
all prior statements, representations, discussions, agreements and understandings relating to such
subject matter; provided, however, that the Confidentiality Agreement shall remain in effect until
and unless the Closing occurs.

     (b) Except as otherwise specifically provided in this Agreement, all covenants, agreements,
representations, guaranties, indemnities, and warranties shall survive the Execution Date of this
Agreement, the Closing Date, and the delivery and recordation of deeds, assignments or bills of
sale which convey the Transferred Properties to Buyers.

     (c) No modification to this Agreement shall be binding unless in writing and signed by all
Parties. The waiver or failure of any Party to enforce any provision of this Agreement shall not be
construed or operate as a waiver of any further breach of such provision or of any other provision
of this Agreement.

12.8 Parties in Interest. Nothing in this Agreement, whether express or implied, is intended to
confer any rights or remedies under or by reason of this Agreement on any persons other than the
Parties and their respective successors and assigns, nor is anything in this Agreement intended to
relieve or discharge the obligation or liability of any third person to any Party to this
Agreement, nor shall any provision of this Agreement give any third persons any right of
subrogation or action over and against any Party to this Agreement.

12.9 Severability. In the event any provision of this Agreement is held to be invalid by a court
or arbitrator of competent jurisdiction, the invalidity of any such provision shall in no way
affect any other provision contained herein; provided, however, that any such invalidity does not
materially prejudice either the Buyers or Sellers in their respective rights and obligations
contained in the valid provisions of this Agreement.

12.10 Records and Assistance.

     (a) For a period of ten (10) years after the Closing Date, Buyers will retain the CUSA Records
and the CPL Records defined in Sections 2.1 and 2.2 above and any records evidencing the operation
and maintenance obligations or the cost reimbursement rights of Buyers hereunder (the “Records”),
and will make such Records available to Sellers for inspection and copying upon reasonable notice
at Buyers’ headquarters (or at such other location in the United States as Buyers shall designate
in writing to Sellers) at reasonable times and during regular office hours. In addition, Buyers
will cooperate in providing information required by Sellers to complete reports, statements, or
other submissions required by Law, without regard to whether such information is contained in CUSA
Records or CPL Records. Following the expiration of such ten-year period, Buyers may destroy such
Records provided Buyers provide Sellers with 60 days’ prior written notice of Buyers’ intent to
destroy any Records transferred to Buyers pursuant to this Agreement. If Sellers do not consent to
the proposed destruction of Records, Buyers shall either continue to retain the Records and
continue to make them available to Sellers as provided
in the preceding sentence or require Sellers to remove such records at Sellers’ cost and
expense. To the extent Buyers receive copies of the Records because such Records relate to both the
Transferred Properties and properties excluded from the Transferred Properties, Buyers shall
maintain those portions of the Records which do not relate solely to the Transferred Properties

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strictly confidential and shall not disclose any such Records to any person or agency, unless such
disclosure is required by Law or has otherwise been made publicly available.

     (b) Notwithstanding the provisions of clause (a) above, Sellers shall prior to or at the
Closing Date designate records located at the Transferred Properties as tax records and shall make
arrangements to have such tax records removed within sixty days of the Closing Date. Buyers may
request copies, at Buyers’ expense, of any such designated tax records either prior to the sixtieth
day after the Closing Date or thereafter upon written request of the Sellers. Buyers shall retain
all other records located at the Transferred Properties for a period of not less than eight years
from the Closing Date and shall grant Sellers’ employees or designees reasonable access to review
and make copies of any records at Sellers’ expense.

     (c) In the event of any dispute with respect to the ownership or operation of the Transferred
Properties arising out of events which occurred prior to Closing, Buyer shall cooperate with
Sellers in the resolution of such dispute, including appearing in any litigation which may result
therefrom; provided, however, that Buyers’ agreement so to cooperate shall not be deemed an
acceptance by any Buyer of any liability arising from such dispute, as to which the other
provisions of this Agreement shall control. Buyer, acknowledging that Sellers have continuing
obligations with respect to outstanding lawsuits and claims associated with the Transferred
Properties and that Sellers may be parties to claims and litigation asserted after Closing arising
out of ownership or operations prior to Closing, shall make available to Sellers, upon Sellers’
request at all reasonable times, any and all files and business records in Buyers’ custody or
control transferred by Sellers to Buyers hereunder and, except in the case of a conflict of
interest between the parties, any and all individuals employed by Buyers whose testimony or
knowledge in the opinion of Sellers’ counsel may be necessary or useful to it respecting the issues
involved in such claims or litigation or in anticipation thereof. The Buyers agree to preserve all
documents required to be preserved by any statutes regulation, ordinance, order, and other
government requirements. The Refinery Buyer also agrees to preserve all documents relating to Clean
Air Act New Source Review Enforcement Actions until all potential such claims have been resolved.

     (d) While Sellers are transferring books and records pertaining to the Transferred Properties
to Buyers, Sellers by such act in no way intend to waive their attorney client and work product
privileges as to such documents which may be contained in such books and records and in particular
with respect to those files associated with outstanding claims and lawsuits which have been
identified in this Agreement. Buyers shall continue to maintain the confidential status of those
files or turn them over to Sellers if so requested.

12.11 Counterparts; Facsimile. This Agreement may be executed in multiple counterparts, which together shall constitute an
original Agreement. The signature of any of the Parties hereto transmitted to the other Parties via
facsimile, shall constitute the valid execution and delivery of this Agreement by such Party.

[Remainder of page intentionally left blank; signature page follows]

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     IN WITNESS WHEREOF, Sellers and Buyers have caused this Agreement to be executed by their duly
authorized representatives as of the Execution Date.

	 	 	 	 	 
	 	CHEVRON U.S.A. INC.,

a Pennsylvania corporation

 	 
	 	By:  	       /s/ Walker C. Taylor
 	 
	 	 	                    Walker C. Taylor          	 
	 	 	                    Assistant Secretary 	 
	 

	 	 	 	 	 
	 	CHEVRON PIPE LINE COMPANY, 

a Delaware corporation

 	 
	 	By:  	       /s/ Walker C. Taylor
 	 
	 	 	                    Walker C. Taylor             	 
	 	 	                    Assistant Secretary 	 
	 

	 	 	 	 	 	 	 	 	 
	 	 	WESTERN REFINING COMPANY, L.P.	 	 
	 	 	a Delaware limited partnership	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	By: Refinery company, L.C.,
its general partner	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	By:
	 	   /s/ Paul Foster
 

	 	 
	 

	 	 	 	 	 	                Paul Foster, President	 	 

	 	 	 	 	 	 	 	 	 
	 	 	KASTON PIPELINE COMPANY, L.P.,	 	 
	 	 	a Delaware limited partnership	 	 
	 
	 	 	 	 	 	 	 	 
	 	 	By: KPL Pipeline Company, L.L.C.	 	 
	 	 	its general partner	 	 
	 
	 	 	 	 	 	 	 	 
	 

	 	 	 	By:
	 	   /s/ Paul Foster
 

	 	 
	 

	 	 	 	 	 	                Paul Foster, President	 	 

78

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