Exhibit 10.4




                     UNOCAL NONQUALIFIED RETIREMENT PLAN B1
                                 (July 14, 2005)

This Unocal Nonqualified Retirement Plan B1 (the "Plan") replaces the Unocal
Supplemental Retirement Plan For Key Management Personnel and Unocal
Nonqualified Retirement Plan B effective January 1, 2005 for benefits in the
Unocal Supplemental Retirement Plan for Key Management Personnel and Unocal
Nonqualified Retirement Plan B 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 and only for the purpose of providing retirement benefits for such
employees in excess of the limitations imposed by the Internal Revenue Service
under Section 401(a)(17) of the Internal Revenue Code.

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      The Employee's "Final Average Monthly Pay" under the Unocal Retirement
         Plan is less than it would have been in the absence of the requirements
         of Section 401(a)(17) of the Code.

Article 2 - Benefit

2.1      The amount of the Employee's monthly benefit shall be equal to the
         excess, if any, of: (1) the monthly benefit which would have been
         payable under the Unocal Retirement Plan to the Employee were it not
         for the limitations imposed by 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), over (2) the sum of (a) the actual monthly benefits
         payable under the Unocal Retirement Plan and (b) the actual monthly
         benefit payable under Unocal Nonqualified Retirement Plan A1.

2.2      In the event that: (1) the monthly benefits computed under Article
         2.1.1 of Unocal Nonqualified Retirement Plan C1 (determined without
         regard to the Employee's eligibility to participate in such plans)
         minus (2) the sum of (a) the actual monthly benefit payable under the
         Unocal Retirement Plan and (b) the actual monthly benefits payable
         under Unocal Nonqualified Retirement Plan A1 is less than the benefit
         calculated under Article 2.1 of this Plan, the monthly benefit payable
         under this Plan shall be reduced to such lower amount.

2.3      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 installments 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 payment 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.

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 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 includible 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
         such termination and amendment(s) 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      "Employee" - A person who is in the employment of an Employer on or
         after January 1, 2005.

5.5      "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.

5.6      "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.

5.6      "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.

5.7      "Plan" - Unocal Nonqualified Retirement Plan B1.