Exhibit 10.5



                     UNOCAL NONQUALIFIED RETIREMENT PLAN C1
                                 (July 14, 2005)

The Unocal Nonqualified Retirement Plan C1 (the "Plan") replaces Unocal
Nonqualified Retirement Plan "C" for benefits in Unocal Nonqualified Retirement
Plan C that were transferred to the Plan effective January 1, 2005 with regard
to persons who were Employees on or after January 1, 2005.

The Plan is maintained by the Company primarily for the purpose of providing
deferred compensation for a select group of management or highly compensated
employees.

The Plan is intended to comply with the provisions of the American Jobs Creation
Act of 2004, Public Law Number 108-357 which added Section 409A to the Internal
Revenue Code. To the extent that guidance from the United States Treasury and
the United States Internal Revenue Service has not been issued, the Plan will be
operated in accordance with a reasonable, good-faith interpretation of Section
409A and its purpose, including the legislative history.

Article 1- Eligibility

The Employee shall be eligible if each of the following provisions is satisfied:

1.1      The Employee is a Member of the Unocal Retirement Plan;

1.2      The Employee's salary grade classification with an Employer is M04,
         T06, or above;

1.3      At the time of the Employee's separation from service with an Employer,
         the Employee had at least five years of Benefit Service under the
         Unocal Retirement Plan or the Employee is entitled to a vested right to
         his or her Accrued Benefit under the Unocal Retirement Plan as a result
         of a Change of Control; and

1.4      At the time of the Employee's separation from service with an Employer,
         the Employee had received a Qualifying Incentive Plan Award ("Incentive
         Award") within the ten-year period used in determining Final Average
         Monthly Pay.

Article 2 - Benefit

2.1. The amount of the Employee's monthly benefit shall be equal to the excess,
if any, of:

         1.   The amount of the monthly benefit that would have been payable
              under the Unocal Retirement Plan, without regard to the
              limitations imposed by the Internal Revenue Service under Sections
              415 and 401(a)(17) of the Code (including without limitation any
              enhanced benefit that would have been payable as a result of a
              Termination of Employment following a Change of Control) if, for
              all purposes thereunder, (1) Final Average Monthly Pay had
              included one-thirty-sixth (1/36) of the sum of the highest three
              calendar year Qualifying Incentive Plan Awards included in
              Earnings during the 120-month period ending on the Member's date
              of separation from service (for this purpose any Qualifying
              Incentive Plan Award (whether or not consecutive) received after
              separation from service shall also be included) (the "Alternative
              Incentive Pay Component"), in lieu of the Qualifying Incentive
              Plan Award component included in the actual computation of Final
              Average Monthly Pay, and (2) Earnings had included the amounts the
              Employee elected to defer under the Unocal Deferred Compensation
              Plan (but not interest, dividends, or gains in the value of such
              deferrals while in the Deferred Compensation Plan or payments from
              the Deferred Compensation Plan) which were not included in
              Earnings and which, but for such deferral, would have been
              included in Earnings, over

         2.   The sum of monthly benefits actually payable under Unocal
              Nonqualified Retirement Plan A1, Unocal Nonqualified Retirement
              Plan "B1, and the Unocal Retirement Plan.

         For purposes of calculating the monthly benefit under Article 2.1.1.,
         the Employee's Final Average Monthly Pay shall be computed using the
         Alternative Incentive Pay Component notwithstanding that for purposes
         of the Unocal Retirement Plan, Final Average Monthly Pay may be
         determined with reference to a 12 month period pursuant to the Change
         of Control provisions of the Unocal Retirement Plan, if in effect and
         applicable to the Employee.

  2.2    Notwithstanding any provision in this Plan, in the event that: (1) it
         shall be determined that any benefit or payment under the Plan is a
         "parachute payment" (within the meaning of Section 280G of the Code)
         which is subject to the excise tax imposed by Section 4999 of the Code
         ("Excise Tax"), (2) the Employee is not entitled (pursuant to an
         employment or other agreement) to receive a "gross up" payment to
         provide the Employee with additional compensation to offset the impact
         of the Excise Tax (a "Gross Up Arrangement"), and (3) the Employee
         would receive a greater net after-tax benefit if such Employee's
         aggregate benefits and payments from the Company and its affiliates,
         whether under the Plan or otherwise, were reduced to a level which does
         not exceed the greatest amount that could be paid to the Employee
         without giving rise to Excise Tax (the "Reduced Amount"), then the
         Employee's benefits or payments under the Plan shall be reduced as
         determined by the Company so the benefits or payments under the Plan
         when aggregated with all benefits and payments from the Company and its
         affiliates do not exceed the Reduced Amount. The Employee's net
         after-tax benefit shall be determined after application of the Excise
         Tax, all federal, state and local income taxes and payroll or other
         taxes, and by including all benefits and payments from the Company and
         its affiliates which are treated as "parachute payments" and included
         in determining liability for the Excise Tax. The determination of the
         applicability of the Excise Tax and the Reduced Amount shall be made by
         the Company in good faith, provided that with respect to an Employee
         who is subject to Gross Up Arrangement or other contract or agreement
         that provides procedures for determining the existence of an Excise
         Tax, the procedures in such Gross Up Arrangement, contract or agreement
         shall apply. If the benefits or payments under the Plan are to be
         reduced to the Reduced Amount and the Employee receives other benefits
         or payments treated as "parachute payments" and included in determining
         liability for the Excise Tax, the Company may allocate such portion of
         the reduction amount to the benefits and payments under the Plan as it
         deems appropriate.

Article 3 - Form and Time of Payment

3.1      Benefits under this Plan shall commence at the same time as benefits
         under the Unocal Retirement Plan, except that benefits paid under this
         Plan in installment payments shall commence on the date that
         installment payments are elected to commence subject to Article 3.4 and
         except that distributions to a Key Employee shall not commence until
         the earlier of at least six months after the Employee's retirement or
         six months after the Employee's death. Interest in an amount allowed by
         law as determined by the Union Oil Company of California Treasury
         Department shall accrue to such distribution during the six-month
         waiting period. Benefits under this Plan shall, in addition to any
         Iimits imposed herein, be subject to the provisions of the Unocal
         Retirement Plan, except as specifically provided otherwise by this
         Plan.

3.2.     An eligible Employee may elect to receive payments under this Plan
         under any of the forms of payments available under the Unocal
         Retirement Plan, except the Five Years Certain Life Annuity Form and
         the Ten Years Certain Life Annuity Form, with respect to his or her
         benefit under this Plan. For purposes of this Plan, the Lump Sum Cash
         Settlement Form is referred to as a single sum cash payment. Such
         election shall also apply with respect to amounts payable subsequent to
         retirement when an Incentive Award received subsequent to retirement
         results in an increased benefit hereunder.

3.3      The forms of payment under this Plan shall be subject to the terms,
         conditions and actuarial adjustments applicable to such forms of
         payment under the Unocal Retirement Plan.



3.4      Notwithstanding the foregoing, an Employee may elect, subject to such
         dates, terms, and conditions as the Company deems appropriate, to
         receive the single sum cash payment amount, as determined above,
         payable in up to ten annual cash installments. No interest shall accrue
         or be credited to such payments or amounts.

3.5      An eligible Employee may elect a method of distribution within 30 days
         after such employee first becomes eligible to participate in the Plan.
         An eligible Employee may change an elected distribution method by
         making a subsequent timely election, at any time that is not later than
         twelve months prior to the Employee's retirement date.

         Also, an eligible Employee may make a distribution election prior to
         December 31, 2005, provided that the election complies with Q&A 19 of
         Internal Revenue Service Notice 2005-1 or subsequent guidance under
         Section 409A of the Code.

3.6      If an Employee does not make a timely election of the form of payment
         of benefits, then benefits under this Plan will be paid as a single sum
         cash payment unless the Employee makes a timely and proper election to
         change the distribution method.

         An election to change a distribution method (or the single sum cash
         payment if no distribution election has been made) (1) May not take
         effect for at least twelve months, (2) Must provide for an additional
         deferral of at least five years in the case of a payment that is not
         attributable to death, disability, or unforeseeable emergency, and (3)
         Must be made at least twelve months before the date of the first
         scheduled payment if the election relates to distributions at a
         specified time or pursuant to a fixed schedule.

3.7     The time or schedule of a payment under the plan cannot be accelerated
        except: (1) as necessary to fulfill a domestic relations order, (2) to
        comply with a certificate of divestiture (as defined in Internal Revenue
        Code Section 1043(b)(2)), or (3) for a cash-out of an amount of not
        greater than $10,000 to a former Employee.

        Regarding such cashouts, the payment must be a payment of the Employee's
        entire interest in the Plan and the payment must be made on or before
        the later of (A) December 31 of the calendar year in which occurs the
        Employee's separation of service, or (B) the date 2 1/2 months after the
        Employee's separation from service.

3.8      If any provision of this Plan causes Plan benefits to be includable for
         federal income tax purposes in the gross income of an Employee (or
         beneficiary) prior to actual payment of such Plan benefits to the
         Employee (or beneficiary), the Company shall pay such Plan benefits to
         the Employee (or beneficiary) upon a final determination to such
         effect, notwithstanding any other provision of this Plan to the
         contrary.

3.9      The Spouse (or other beneficiary) of an Employee may be entitled to
         benefits in the event of the death of the Employee.

         1.   If the Employee dies prior to commencement of payment of benefits,
              a benefit shall be payable only to the Employee's Spouse and only
              if the Spouse has been married to the Employee for a period of at
              least one year on the date of the Employee's death. The amount of
              the benefit payable to the Employee's eligible Spouse shall equal
              the amount that would be paid from the Unocal Retirement Plan
              under the Spouse's Annuity Benefit, the Special Spouse's Benefit,
              the Spouse's Benefit, or the Spouse's Employee-Equivalent Benefit,
              provided that the eligibility requirements under the Unocal
              Retirement Plan have been met for the elected benefit, with the
              calculation based on the Member's  benefit under Article 2.1 and
              Article 2.2 of this Plan. Benefits under this Plan will commence
              at the same time as benefits under the Unocal Retirement Plan. If
              a Spouse elects to receive the  Spouse's Employee-Equivalent
              Benefit, the Spouse may elect, subject to such dates, terms, and
              conditions as the



              Company deems appropriate, to receive such benefit payable in up
              to ten annual cash installments. No interest shall accrue or be
              credited to such payments. No other benefit shall be payable to
              any other person or entity in the event that a benefit is paid
              under this Article 3.9.1.

         2.  If the Employee dies after commencement of payment of benefits, the
             amount, timing, and form of the benefit payments under this Plan
             shall be in accordance with the Employee's election of form of
             payment under this Plan.

               a.   If the  Employee  elected  installment  payments  or the Ten
                    Equal Annual Installments,  the Spouse (or beneficiary) will
                    receive  one  payment  in an amount  equal to the  remaining
                    payments.

               b.   If the Employee  elected a Joint and Survivor  Life Annuity,
                    payments  will  continue  for the life of the  Spouse  (with
                    appropriate reduction based on the Employee's election).

               c.   If the Employee elected the Single Life Annuity,  no benefit
                    will be paid from this Plan to the Spouse (or beneficiary).

         No other benefit shall be payable to any other Beneficiary or
         entity in the event that a benefit is paid under this Article 3.9.2..

Article 4 - Administration and Termination

4.1      Union Oil Company of California shall administer the Plan. Such
         responsibilities shall be carried out through its corporate officers
         and employees acting in their capacities as officers and employees and
         not as fiduciaries.

4.2      The Board of Directors may terminate or amend any or all of the
         provisions of or add provisions to this Plan at any time, provided that
         it is the Board of Director's intent that such termination and
         amendments comply with applicable law. However, no termination or
         amendment of this Plan shall reduce or adversely affect a benefit then
         being paid under this Plan,. After a Change of Control, the Plan may
         not be amended to eliminate or modify the right of an Employee (or
         beneficiary) to receive a single sum cash payment of his or her
         benefits pursuant to Article 3.

4.3      Except for a domestic relations order, no Employee, beneficiary or
         joint annuitant may assign, transfer, hypothecate, encumber, commute or
         anticipate his or her interest in any benefits under this Plan.
         Interests and payments under this Plan are to be free from voluntary or
         involuntary assignment, and judicial levy and execution to the full
         extent permissible under applicable law.

4.4      Payments under this Plan shall be made from the general funds of the
         Company or an Employer or from a grantor (rabbi) trust established by
         the Company or Union Oil Company of California, unless otherwise
         provided for by the Board of Directors.

4.5      The Unocal Retirement Plan Committee shall have sole discretion
         regarding interpretation of this Plan and making factual
         determinations. Unless defined below or otherwise indicated,
         capitalized or quoted materials refer to the meanings and definitions
         under the Unocal Retirement Plan. Any questions that arise as to the
         rights to and amount of any benefits under this Plan or as to the
         interpretation of any of its provisions shall be determined by said
         Committee.

4.6      Nothing in this Plan shall give any person a right to remain in the
         employment of the Employer or affect the right of the Employer to
         modify or terminate the employment of an Employee at any time, with or
         without cause.

4.7      Any controversy or claim arising out of or relating to this Plan shall
         be settled by binding arbitration in Los Angeles, California, in
         accordance with the Commercial Arbitration Rules of the



         American Arbitration Association. The parties shall seek to agree upon
         appointment of the arbitrator and the arbitration procedures. If the
         parties are unable to reach such agreement, a single arbitrator who is
         a retired judge of a Federal or California state court shall be
         appointed pursuant to the AAA Commercial Arbitration Rules, and the
         arbitrator shall determine the arbitration procedures. Any award
         pursuant to such arbitration shall be included in a written decision
         which shall state the legal and factual reasons upon which the award
         was based, including all the elements involved in the calculation of
         any award. Any such award shall be deemed final and binding and may be
         entered and enforced in any state or federal court of competent
         jurisdiction. The arbitrator shall interpret the Plan in accordance
         with the laws of California. The arbitrator shall be authorized to
         award reasonable attorney's fees and other arbitration-related costs to
         a Participant or his or her beneficiary if an award is made in favor of
         the Participant or beneficiary. The award shall be limited to Plan
         benefits at issue, reasonable attorneys' fees and arbitration-related
         costs.

4.8      The Plan shall not be terminated by a transfer or sale of assets of the
         Company or by the merger or consolidation of the Company into or with
         any other corporation or other entity. The Plan shall be binding upon
         and inure to the benefit of any successor of the Company provided,
         however, that the Company or its successor may terminate the Plan, in
         whole or in part, at such time as it may determine in its sole
         discretion. Upon such termination, all affected Employees shall become
         fully vested in the benefits payable hereunder,

Article 5 - Definitions

5.1      "Board of Directors" - The Board of Directors of Unocal Corporation.

5.2      "Change of Control" - For time of payment purposes, a Change of Control
         as defined by Internal Revenue Service Notice 2005-1 and prior or
         subsequent related guidance by the Internal Revenue Service or the
         Department of the Treasury. For vesting purposes, a Change of Control
         as defined by the Unocal Retirement Plan.

5.3      "Company" - Unocal Corporation.

5.4      "Deferred Compensation Plan" - The Unocal Deferred Compensation Plan,
         including any successor plan.

5.5      "Employee" - A person who is in the employment of an Employer on or
         after January 1, 2005.

5.6      "Employer" - Unocal Corporation, Union Oil Company of California and
         any other subsidiary or affiliate of the Company that is a
         Participating Company in the Unocal Retirement Plan.

5.7      "Key Employee" - An Employee who is a "Key Employee" as defined by the
         JOBS Act, including Internal Revenue Service Notice 2005-1 and prior or
         subsequent related guidance by the Internal Revenue Service or the
         Department of the Treasury.

5.8      "Law" - The Plan shall be governed by and construed in accordance with
         the laws of the State of California to the extent that United States
         federal law is inapplicable.

5.9      "Plan" - Unocal Nonqualified Retirement Plan "C1."

5.10     "Qualifying Incentive Plan" - Means the Unocal Revised Incentive
         Compensation Plan, the Unocal Global Trade Trader and Support Incentive
         Plan and the New Ventures Incentive Compensation Program.

5.11     "Qualifying Incentive Plan Award" - Means an annual award under a
         Qualifying Incentive Plan other than awards which are team, project or
         special awards. Such annual awards shall be included on the date the
         annual award was payable, regardless of whether or not the annual award
         was deferred. A Qualifying Incentive Plan Award shall not include any
         portion of any enhancement resulting from an election to defer such an
         annual award.