Document:

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                                                                  Exhibit 10.6.a

                                FMC CORPORATION
                        DEFINED BENEFIT RETIREMENT TRUST

     THIS AGREEMENT, effective as of the 2nd day of October, 2000, is made
between FMC CORPORATION, a Delaware corporation, herein referred to as the
"Company", and THE NORTHERN TRUST COMPANY, an Illinois corporation, of Chicago,
Illinois, as Trustee, and constitutes a restatement of the FMC CORPORATION
DEFINED BENEFIT RETIREMENT TRUST agreement, which was heretofore made by the
Company as the funding medium for the FMC Corporation Employees' Retirement
Program, hereinafter referred to as the "Plan", and under which the Trustee is
accepting appointment as successor trustee.

     The Company has appointed the Employee Welfare Benefit Plans Committee,
hereinafter referred to as the "Committee", as the Plan fiduciary which has the
responsibility for administering the Plan. The Committee has appointed the
Pension Investment Subcommittee of the Committee as the Plan fiduciary which has
the responsibility for Plan investments.

     The Trust Fund shall consist of all assets held by the Trustee as of the
date of this Agreement, all investments and reinvestments thereof and all
additions thereto by way of contributions, earnings and increments; is intended
to constitute a qualified trust as defined under Section 401(a) of the Code and
is entitled to tax exemption under Section 501(a) of the Code; shall at all
times be maintained as a domestic trust in the United States; and shall be held
upon the following terms:

                           ARTICLE ONE:  DEFINITIONS

     For the purposes of this Agreement:

     1.1 "Beneficiary" means a person designated to receive a benefit under the
Plan after the death of a Participant;

     1.2 "Code means the Internal Revenue Code of 1986, as in effect from time
to time, and the regulations issued thereunder;

     1.3  "Committee" means the Employee Welfare Benefit Plans Committee as
constituted from time to time which has the responsibility for administering the
Plan and shall be deemed for purposes of ERISA to be the Plan administrator and
the named fiduciary for Plan administration or any designee thereof authorized
to act on behalf of the Committee;

     1.4  "Company" means FMC Corporation and any successor to it;
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     1.5  "Company Stock Account" means a Separate Account subject to the
investment responsibility of the Committee as set forth in Section 5.5 hereof;

     1.6 "Custodial Agent" means one or more persons or entities designated by
the Investment Subcommittee to maintain custody of assets of a Separate
Investment Account pursuant to Section 3.1(c);

     1.7 "ERISA" means the Employee Retirement Income Security Act of 1974, as
in effect from time to time, and the regulations issued thereunder;

     1.8 "Investment Adviser" means an Investment Manager or an Investment
Trustee to whom the Investment Subcommittee has delegated investment
responsibility for a Separate Account or the Investment Committee with respect
to any assets of the Trust Fund for which the Investment Committee has
investment responsibility;

     1.9 "Investment Subcommittee" means the Pension Investment Subcommittee of
the Committee as constituted from time to time which has the responsibility for
allocating the assets of the Trust Fund among the Separate Accounts and any
Trustee Investment Account, for monitoring the diversification of the
investments of the Trust Fund, for determining the propriety of investment of
the Trust Fund in foreign securities and of maintaining the custody of foreign
investments abroad, for assuring that the Plan does not violate any provisions
of ERISA limiting the acquisition or holding of "employer securities" or
"employer real property" and for the appointment and removal of Investment
Advisers and shall be deemed for purposes of ERISA to be the named fiduciary for
Plan investments;

     1.10 "Investment Manager" means an investment manager as defined in Section
3(38) of ERISA, which is appointed by the Investment Subcommittee to manage a
Separate Investment Account; but the Trustee shall have no responsibility to
determine whether a person or entity acting as an Investment Manager meets or
continues to meet this definition;

     1.11 "Investment Trustee" means the trustee appointed by the Investment
Subcommittee to manage a Separate Investment Trust Account;

     1.12 "Participant" means a person who is a current, retired or former
employee and who has rights in the Plan;

     1.13 "Plan" means the FMC Corporation Employees' Retirement Program;

     1.14 "Separate Account" means a Separate Investment Account, a Separate
Investment Trust Account or a Separate Insurance Contract Account;

     1.15 "Separate Insurance Contract Account" means assets of the Trust Fund
allocated by the Investment Subcommittee to an account of the Trust for
investment in insurance contracts directed by the Investment Subcommittee;

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     1.16 "Separate Investment Trust Account" means assets of the Trust Fund
allocated by the Investment Subcommittee to an account of the Trust which is to
be managed by an Investment Manager or the Investment Subcommittee;

     1.17 "Separate Investment Trust Account" means assets of the Trust Fund
allocated by the Investment Subcommittee to a Separate Account to be managed by
an Investment Trustee;

     1.18 "Subsidiary" means a subsidiary or affiliate of the Company;

     1.19 "Subtrust" means assets of a Separate Investment Account which are
held by a Subtrustee pursuant to an agreement which the Investment Subcommittee
has approved and directed the Trustee to enter into;

     1.20 "Subtrustee" means the trustee appointed by the Investment
Subcommittee to act as trustee of a Subtrust;

     1.21 "Trust" means the qualified defined benefit retirement trust evidenced
hereby, as amended from time to time;

     1.22 "Trust Fund" means all assets subject to this Agreement;

     1.23 "Trustee" means The Northern Trust Company and any successor to it as
trustee or trustees of the Trust Fund under this Agreement; and

     1.24 "Trustee Investment Account" means assets of the Trust Fund allocated
by the Investment Subcommittee to an account of the Trust to be managed by the
Trustee with the written consent of the Trustee.

                          ARTICLE TWO:  DISTRIBUTIONS

     2.1 The Trustee shall make distributions from the Trust Fund to such
persons, in such amounts, at such times and in such manner as the Committee or
its designee shall from time to time direct pursuant to the service description
furnished by the Trustee to the Committee from time to time. The Trustee shall
have no responsibility to ascertain whether any direction received by the
Trustee from the Committee or its designee in accordance with the preceding
sentence is proper and in compliance with the terms of the Plan or to see to the
application of any distribution. The Trustee shall not be liable for any
distribution made in accordance with any direction from the Committee or its
designee in accordance with the first sentence hereof and in good faith without
actual notice or knowledge of the changed condition or status of any recipient.
If any distribution made by the Trustee is returned unclaimed, the Trustee shall
notify the Committee or its designee and shall dispose of the distribution as
the

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Committee or its designee shall direct. The Trustee shall have no obligation to
search for or ascertain the whereabouts of any payee of benefits of the Trust
Fund.

     2.2 Notwithstanding the foregoing, the Committee may make distributions
from the Trust Fund through a commercial banking account in a federally insured
banking institution (including the Trustee) established by the Committee in the
name of the Trust for such purpose after written notice to the Trustee that the
commercial banking account has been so established. Upon such written notice,
the Committee shall have the responsibility to assure that any such commercial
banking account is established and maintained in accordance with ERISA and is
properly insured. The Trustee shall make such deposits of portions of the Trust
Fund to the commercial banking account as the Committee or its designee may from
time to time direct. The Trustee shall have no further responsibility for funds
held in or disbursed from any such commercial banking account, or to prepare any
informational returns for tax purposes as to distributions made therefrom.

               ARTICLE THREE:  SEPARATE ACCOUNTS AND INVESTMENT
                             SUBCOMMITTEE ADVISORS

     3.1 The Trust Fund shall consist of one or more Separate Accounts and, with
the Trustee's written consent, one or more Trustee Investment Accounts. All
Separate Accounts and any Trustee Investment Accounts shall be established by
the Trustee at the direction of the Investment Subcommittee. The Investment
Subcommittee shall designate assets of the Trust Fund to be allocated to each
Separate Account and each Trustee Investment Account and shall direct the
Trustee with respect to any transfer of assets between Separate Accounts or
between a Separate Account and a Trustee Investment Account; provided that no
asset shall be allocated or transferred to a Trustee Investment Account without
the Trustee's written consent. The Investment Subcommittee shall have investment
responsibility for any assets of the Trust Fund not otherwise allocated to a
Separate Account or Trustee Investment Account, and such assets shall comprise a
Separate Investment Account for which the Investment Subcommittee serves as
Investment Adviser. The following provisions shall apply to the Separate
Accounts:

     3.2 With respect to each Separate Investment Account, the Investment
Subcommittee may appoint an Investment Manager, who shall acknowledge by a
writing delivered to the Investment Subcommittee and to the Trustee that it is a
fiduciary with respect to the assets allocated thereto, or in the event the
Investment Subcommittee does not appoint an Investment Manager, the Investment
Subcommittee shall have investment responsibility with respect to such Separate
Investment Account. The Trustee shall act with respect to assets allocated to a
Separate Investment Account only as directed by the Investment Manager or, in
the event that the Investment Subcommittee does not appoint an Investment
Manager, the Investment Subcommittee. The Investment Subcommittee may direct
that any or all of the assets of a Separate Investment Account be held by a
Subtrustee. The Trustee shall have custody of and custodial responsibility for
all assets of the Trust Fund held in a Separate Investment Account except as
otherwise provided in this Agreement or as follows:

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          (a) The Subtrustee of a Subtrust shall have custody of and custodial
     responsibility for any assets of a Separate Investment Account allocated to
     it by the Investment Subcommittee;

          (b) The trustee of a collective or group trust fund (including without
     limitation an Investment Manager or its bank affiliate) shall have custody
     of and custodial responsibility for any assets of a Separate Investment
     Account invested in such collective or group trust fund; and

          (c) The Investment Subcommittee may direct in writing that the custody
     of additional assets of a Separate Investment Account (other than those
     referred to in paragraphs (a) and (b) of this Section 3.2) be maintained
     with a Custodial Agent.  In such event, the Investment Subcommittee shall
     approve, and direct the Trustee to enter into, a custody agreement with the
     Custodial Agent (which custody agreement may authorize the Custodial Agent
     to maintain custody of such assets with one or more subagents, including a
     broker or dealer registered under the Securities Exchange Act of 1934 or a
     nominee of such broker or dealer).  The Custodial Agent shall have
     custodial responsibility for any assets maintained with the Custodial Agent
     or its subagents pursuant to the custody agreement. Notwithstanding any
     other provision of this Agreement, the Company (which has the authority to
     do so under the laws of its state of incorporation) agrees to indemnify the
     Trustee from any liability, loss and expense, including reasonable legal
     fees and expenses, which the Trustee sustains by reason of acting in
     accordance with any directions of the Investment Committee pursuant to this
     paragraph (c).  This paragraph shall survive the termination of this
     Agreement.

     3.3 With respect to each Separate Investment Trust Account, the Trustee and
the Investment Trustee thereof shall upon the direction of the Investment
Subcommittee execute an investment trust agreement with respect thereto. The
Investment Trustee shall have custody of all of the assets of the Separate
Investment Trust Account except such assets as the Investment Subcommittee may
from time to time determine shall be held in the custody of the Trustee with the
Trustee's written consent; the Trustee shall act with respect to any such assets
in its custody only as directed by the Investment Trustee.

     3.4 With respect to each Separate Insurance Contract Account, from assets
allocated thereto, the Trustee shall purchase or continue in effect such
insurance contracts, including annuity contracts and policies of life insurance,
as the Investment Subcommittee shall direct, the issuing insurance company may
credit those assets to its general account or to one or more of its separate
accounts, and the Trustee shall act with respect to those contracts only as
directed by the Investment Subcommittee.

     3.5 The Investment Subcommittee shall have investment responsibility for
assets held in any Separate Account for which an Investment Manager or
Investment Trustee has not been retained, has been removed, or is for any reason
unwilling or unable to act. With respect to assets or Separate Accounts for
which the Investment Subcommittee has investment

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responsibility, the Trustee, acting only as directed by the Investment
Subcommittee, shall enter into such agreements as are necessary to facilitate
any investment, including agreements entering into a limited partnership,
Subtrust or the participation in real estate funds. The Trustee shall not make
any investment review of, or consider the propriety of holding or selling, or
vote any assets for which the Investment Subcommittee has investment
responsibility.

     3.6 With respect to each Separate Account, the Investment Adviser thereof
shall have the investment powers granted to the Trustee by ARTICLE FOUR, as
limited by Section 5.1 through Section 5.3 of ARTICLE FIVE, as if all references
therein to the Trustee referred to the Investment Adviser.

     3.7 The Investment Subcommittee may also direct the Trustee as fiduciary to
lend securities of the Trust Fund held by the Trustee by entering into a written
agreement with the Trustee. The terms of the agreement between the Investment
Subcommittee and the Trustee shall be consistent with Department of Labor
Prohibited Transaction Exemption 81-6 or any successor exemption. The written
agreement between the Investment Subcommittee and the Trustee shall direct the
Trustee to enter into a loan agreement with a borrower or borrowers. The Trustee
shall transfer securities to the borrower and invest or hold on behalf of the
Trust Fund the collateral received in exchange for the securities.
Notwithstanding anything in this Agreement to the contrary, the borrower shall
have the authority and responsibility to vote securities it has borrowed. The
Trustee shall maintain a record of the market value of the loaned securities and
shall be paid reasonable compensation as agreed to by the Trustee and the
Investment Subcommittee.

     3.8 The Investment Subcommittee may direct the Trustee to: (i) enter into
such agreements as are necessary to implement investment in futures contracts
and options on futures contracts; (ii) transfer initial margin to a futures
commission merchant or third party safekeeping bank pursuant to directions from
an Investment Adviser and (iii) pay or demand variation margin in accordance
with industry practice to or from such futures commission merchant based on
daily marking to market calculations. The Trustee shall have no investment or
custodial responsibility with respect to assets transferred to a futures
commission merchant or third party safekeeping bank.

                       ARTICLE FOUR:  POWERS OF TRUSTEE

     Except as otherwise provided in this Agreement, the Trustee shall hold,
manage, care for and protect the assets of the Trust Fund and shall have until
actual distribution thereof the following powers and, except to the extent
inconsistent herewith, those now or hereafter conferred by law:

     4.1 To retain any asset originally included in the Trust Fund or
subsequently added thereto;

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     4.2 To invest and reinvest the assets without distinction between income
and principal in property of any kind, without restriction, including options,
futures contracts, and options on futures contracts.

     4.3 To acquire and hold qualifying employer securities and qualifying
employer real property, as such investments are defined in Section 407(d) of
ERISA;

     4.4 To deposit any part or all of the assets with the Trustee or its
affiliate as trustee, or another person or entity acting as trustee of any
collective or group trust fund which is now or hereafter maintained as a medium
for the collective investment of funds of pension, profit sharing or other
employee benefit plans, and which is qualified under Section 401(a) of the Code
and exempt from taxation under Section 501(a) of the Code, and to withdraw any
part or all of the assets so deposited; any assets deposited with the trustee of
a collective or group trust fund shall be held and invested by the trustee
thereunder pursuant to all the terms and conditions of the trust agreement or
declaration of trust establishing the fund, which are hereby incorporated herein
by reference and shall prevail over any contrary provision of this Agreement;
provided, however, that the books and records of the Trustee shall at all times
show that all such investments are part of the Trust Fund;

     4.5 To deposit cash in any depository, including the banking department of
the Trustee or its affiliate and any organization acting as a fiduciary with
respect to the Trust Fund;

     4.6 To hold any part of the assets in cash without liability for interest
as the Trustee deems reasonable or necessary pending investment thereof or the
payment of expenses or making of distributions therewith;

     4.7 To cause any asset, real or personal, to be held in a corporate
depository or federal book entry account system or registered in the Trustee's
name or in the name of a nominee or in such other form as the Trustee deems best
without disclosing the trust relationship; provided, however, that the books and
records of the Trustee shall at all times show that all such investments are
part of the Trust Fund;

     4.8 Other than with respect to Company stock, to vote, either in person or
by general or limited proxy, or refrain from voting, any corporate securities
for any purpose; to exercise or sell any subscription or conversion rights; to
consent to and join in or oppose any voting trusts, reorganizations,
consolidations, mergers, foreclosures and liquidations and in connection
therewith to deposit securities and accept and hold other property received
therefor;

     4.9 Subject to Section 5.5 of this Agreement, with respect to Company
stock, to vote, either in person or by general or limited proxy, or refrain from
voting any Company stock for any purpose; to exercise or sell any subscription
or conversion rights; to consent to and join in or oppose any voting trusts,
reorganizations, consolidations, mergers, foreclosures and liquidations and in
connection therewith to deposit securities and accept and hold other

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property received therefor; to give general or special proxies or powers of
attorney with or without the power of substitution; and to generally exercise
any of the powers of an owner with respect to such Company stock;

     4.10 At the direction of the Investment Subcommittee, to lease any assets
for any period of time though commencing in the future or extending beyond the
term of the trust;

     4.11 To borrow money from any lender in order to complete transactions in
cases where adequate funds may not otherwise be available to the Trust Fund,
and, at the direction or with the consent of the Investment Subcommittee, to
borrow money from any lender for any other purpose that as set forth above, to
extend or renew any existing indebtedness and to mortgage or pledge any assets;

     4.12 To sell at public or private sale, contract to sell, convey, exchange,
transfer and otherwise deal with the assets in accordance with industry
practice, and to sell put and covered call options from time to time for such
price and upon such terms as the Trustee sees fit; the Company acknowledges that
the Trustee may reverse any credits made to the Trust Fund by the Trustee prior
to receipt of payment in the event that payment is not received;

     4.13 To employ agents, attorneys-in-fact and proxies and to delegate to any
one or more of them any power, discretionary or otherwise, granted to the
Trustee at the Trustee's expense without any cost to the Company or the Trust
Fund unless such expense is authorized under Section 9.6 hereof, or the Company
agrees in writing to bear such expense;

     4.14 Upon giving the Committee 30 days prior written notice, to compromise,
contest, prosecute or abandon claims in favor of or against the Trust Fund;

     4.15 To appoint foreign custodians as agent of the Trustee to custody
foreign securities holdings of any Separate Account established by the
Investment Subcommittee or of any Trustee Investment Account.

     4.16 To lend securities held by the Trustee and to receive and invest
collateral provided by the borrower, all pursuant to a written agreement between
the Trustee and the Investment Subcommittee;

     4.17 To utilize any tax refund claim procedures with respect to taxes
withheld to which the Trust Fund may be entitled under applicable tax laws,
treaties and regulations; any exercise of such power by the Trustee shall be on
a best efforts basis; and

     4.18 To perform other acts necessary or appropriate for the proper
administration of the Trust Fund, execute and deliver necessary instruments and
give full receipts and discharges.

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                     ARTICLE FIVE:  LIMITATIONS ON POWERS

     For purposes of this Agreement, the powers and responsibilities allocated
to the Trustee shall be limited as follows:

     5.1 The powers of the Trustee shall be exercisable for the exclusive
purpose of providing benefits to the Participants and Beneficiaries under the
Plan and in accordance with the standards of a prudent man under ERISA;

     5.2 Subject to Section 5.1 and Section 5.3, the Trustee shall diversify the
investments of that portion of the Trust Fund for which it has investment
responsibility so as to minimize the risk of large losses;

     5.3 Subject to Section 5.1, the Trustee shall, with respect to that portion
of the Trust Fund for which it has investment responsibility, follow the
investment guidelines established by the Investment Subcommittee;

     5.4 Except as otherwise provided in Section 3.7, the Trustee shall not make
any investment review of, consider the propriety of holding or selling, or vote
other than as directed by the Investment Adviser, any assets of the Trust Fund
allocated to a Separate Account in accordance with ARTICLE THREE, except that if
the Trustee shall not have received contrary instructions from the Investment
Adviser thereof, the Trustee shall invest for short term purposes any cash
consisting of U. S. dollars of a Separate Account in its custody in bonds, notes
and other evidences of indebtedness having a maturity date not beyond five years
from the date of purchase, U.S. Treasury bills, commercial paper, bankers'
acceptances and certificates of deposit, and undivided interests or
participations therein and (if subject to withdrawal on a daily or weekly basis)
participations in common or collective funds composed thereof and regulated
investment companies (including those for which the Trustee or any of its
affiliates acts as advisor). For currencies other than U. S. dollars, the
Trustee shall invest cash of a Separate Account as directed by the Investment
Adviser with respect to that Separate Account and such investments may include
an interest bearing account of a foreign custodian;

     5.5 The Investment Subcommittee shall have the sole investment
responsibility with respect to the retention, sale, purchase or voting of any
Company stock other than Company stock which has been allocated to a Separate
Account over which the Investment Subcommittee has delegated investment
responsibility to an Investment Adviser. The Trustee shall have custody of such
Company stock and shall act with respect thereto as directed by an Investment
Adviser of a Separate Account holding Company stock or the Investment
Subcommittee with respect to Company stock in a Company Stock Account. The
Trustee shall not make any investment review of, consider the propriety of
holding or selling, or vote any such Company stock. With respect to such Company
stock, the Investment Subcommittee shall have the investment powers granted to
the Trustee by ARTICLE FOUR as limited by Section 5.1 and Section 5.2 of ARTICLE
FIVE, as if all references therein to the Trustee referred to the Investment
Subcommittee. No provision of this Section 5.5 shall prevent the

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Trustee from taking any action with respect to the voting or tender of such
Company stock if the Trustee determines in its sole discretion that such action
is necessary in order for the Trustee to fulfill its fiduciary responsibilities
under ERISA;

     5.6 The Investment Subcommittee shall have sole responsibility for the
decision to maintain the custody of foreign investments abroad. Except as
otherwise directed by the Investment Subcommittee, custody of foreign
investments shall be maintained with foreign custodians selected by the Trustee.
The Trustee shall have no responsibility for losses to the Trust Fund resulting
from the acts or omissions of any foreign custodian appointed by the Trustee
unless due to the foreign custodian's fraud, negligence or willful misconduct.
The Trustee shall maintain custody of foreign investments in any jurisdiction
where the Trustee has not selected a custodian solely as directed by the
Investment Subcommittee. The Trustee shall have no responsibility for the
financial condition, acts or omissions of any foreign custodian holding assets
of the Trust Fund at the direction of the Investment Subcommittee.

                            ARTICLE SIX:  ACCOUNTS

     6.1 The Trustee shall maintain accounts of all investments, receipts and
disbursements, including contributions, distributions, purchases, sales and
other transactions of the Trust Fund. The accounts, and the books and records
relating thereto, shall be open to inspection and audit at all reasonable times
by any person or persons designated by the Investment Subcommittee or entitled
thereto under ERISA.

     6.2 Within sixty (60) days after the close of each fiscal year of the Trust
Fund and of any other period agreed upon by the Trustee and the Investment
Subcommittee the Trustee shall render to the Investment Subcommittee a statement
of account for the Trust Fund for the period commencing with the close of the
last preceding period and a list showing each asset thereof as of the close of
the current period and its cost and fair market value. In preparing the
Trustee's written account, the Trustee shall be fully protected in relying,
without duty of inquiry: (i) upon the determination of the issuing insurance
company or other entity with respect to the value of each insurance or
investment contract included in such written account, (ii) upon information
provided by the general partner or other investment entity with respect to the
value of each limited partnership or other investment interest included in such
written account, and (iii) with respect to any assets of the Trust Fund managed
by an Investment Adviser for which the Trustee deems not to have a readily
ascertainable value, upon the fair market value of such assets as determined by
the applicable Investment Adviser.

     6.3 An account of the Trustee may be approved by the Investment
Subcommittee by written notice delivered to the Trustee or by failure to object
to the account by written notice delivered to the Trustee within six (6) months
of the date upon which the account was delivered to the Investment Subcommittee.
The approval of an account shall constitute a full and complete discharge to the
Trustee as to all matters set forth in that account as if the account had been
settled by a court of competent jurisdiction in an action or proceeding to

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which the Trustee, the Company and the Investment Subcommittee were parties. In
no event shall the Trustee be precluded from having its accounts settled by a
judicial proceeding. Nothing in this article shall relieve the Trustee of any
responsibility, or liability for any responsibility, under ERISA.

                      ARTICLE SEVEN:  TRUSTEE SUCCESSION

     7.1 The Trustee may resign at any time by written notice to the Investment
Subcommittee, or the Investment Subcommittee may remove the Trustee by written
notice to the Trustee. The resignation or removal shall be effective sixty (60)
days after the date of the Trustee's resignation or receipt of the notice of
removal or at such earlier date as the Trustee and the Investment Subcommittee
may agree.

     7.2 In case of the resignation or removal of the Trustee, the Investment
Subcommittee shall appoint a successor trustee by delivery to the Trustee of a
written instrument executed by the Investment Subcommittee appointing the
successor trustee and a written instrument executed by the successor trustee
accepting the appointment, whereupon the Trustee shall deliver the assets of the
Trust Fund to the successor trustee but may reserve such reasonable amount as
the Trustee may deem necessary to satisfy outstanding invoices for compensation
for its services as Trustee and any other undisputed, outstanding and accrued
expenses as described in Section 9.5 hereof, against the Trust Fund.

     7.3 The successor trustee, and any successor to the trust business of the
Trustee by merger, consolidation or otherwise, shall have all the powers given
the originally named Trustee. No successor trustee shall be personally liable
for any act or omission of any predecessor. Except as otherwise provided in this
Agreement or under ERISA, the receipt of the successor trustee and the approval
of the Trustee's final account by the Investment Subcommittee in the manner
provided in ARTICLE SIX shall constitute a full and complete discharge to the
Trustee.

                   ARTICLE EIGHT:  AMENDMENT AND TERMINATION

     8.1 The Company may at any time or times with the consent of the Trustee
amend this Agreement in whole or in part by instrument in writing delivered to
the Trustee and effective upon the date therein provided.

     8.2 This Agreement shall terminate by action of the Company. Upon
termination, the Trustee shall distribute the Trust Fund in the manner directed
by the Investment Subcommittee, in kind to the extent of identified assets and
the balance in cash or in kind or partly in each as the Trustee and the
Investment Subcommittee shall agree, except that the Trustee shall be entitled
to prior receipt of such rulings and determinations from such administrative
agencies as it may deem necessary or advisable to assure itself that the
distribution directed is in accordance with law and will not subject the Trust
Fund or the

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Trustee to liability, and except, further, that the Trustee may reserve such
reasonable amount as the Trustee may deem necessary to satisfy outstanding
invoices for compensation for its services as Trustee and any other undisputed,
outstanding and accrued expenses as described in Section9.5 hereof, against the
Trust Fund.

     8.3 This Agreement shall terminate in its entirety when there is no asset
included in the Trust Fund.

                         ARTICLE NINE:  MISCELLANEOUS

     9.1 Any action required to be taken by the Company shall be by resolution
of its board of directors or by the written direction of one or more of its
president, any vice president or treasurer or assistant treasurer, or by such
other person or persons as shall be authorized by such officers or by resolution
of its board of directors, which resolution shall be filed with the Trustee. The
Trustee may take or omit to take any action in accordance with written direction
purporting to be signed by such an officer of the Company or other authorized
person, or in reliance upon a certified copy of a resolution of the board of
directors which the Trustee believes to be genuine. The Trustee shall have no
responsibility for any action taken by the Trustee in accordance with any such
resolution or direction.

     9.2 The Company shall certify to the Trustee in writing the names of the
members of the Committee and Investment Subcommittee acting from time to time,
and the Trustee shall not be charged with knowledge of a change in the
membership of either such committee until so notified in writing by the Company.
Any action required or permitted to be taken by the Committee or the Investment
Subcommittee shall be by direction of (i) one or more of the members of the
committee authorized to take such action hereunder, (ii) such committee's
secretary or (iii) such other designee as shall be designated in writing by the
Committee or the Investment Subcommittee to act for such committee. The Trustee
may rely upon an instrument of designation received from the Committee or the
Investment Subcommittee appointing a designee to act for such committee which it
reasonably believes has been signed by a majority of the members (or by the
secretary or chairman) of the appropriate committee and filed with the Trustee.
The Trustee shall have no responsibility for any action taken by it in
accordance with any direction it reasonably believes to have been given as
provided above. Directions of the Committee or the Investment Subcommittee may
be given to the Trustee by telephone, letter, telex, fax, SWIFT, other
electronic or electro-mechanical means or by other methods the Trustee deems
acceptable.

     9.3 In no event shall the terms of the Plan, either expressly or by
implication, be deemed to impose upon the Trustee any power or responsibility
other than those set forth in this Agreement. The Trustee may assume until
advised to the contrary that the Plan and the Trust Fund are qualified under
Section 401(a) and exempt from taxation under Section 501(a) of the Code, or
under corresponding provisions of subsequent federal tax laws. The Trustee

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shall be accountable for contributions made to the Plan and included among the
assets of the Trust Fund but shall have no responsibility to determine whether
the contributions comply with the provisions of the Plan or of ERISA.

     9.4 In any judicial proceeding to settle the accounts of the Trustee, the
Trustee, the Company and the Investment Subcommittee shall be the only necessary
parties; in any other judicial proceeding with respect to the Trustee or the
Trust Fund, the Trustee, the Company and each affected Subsidiary shall be the
only necessary parties; and no Participant or Beneficiary shall be entitled to
any notice of process. A final judgment in any such proceeding shall be binding
upon the parties to the proceeding and all Participants and Beneficiaries.

     9.5 The Trustee shall be reimbursed for all reasonable and direct expenses
incurred in extraordinary and nonrecurring circumstances in the management and
protection of the Trust Fund to the extent such expenses are not included in the
compensation the Company pays the trustee for its services and shall receive
such reasonable compensation for its services as the Trustee and the Company
shall from time to time agree. Those items of expense and compensation shall be
paid from the Trust Fund, subject to prior payment or reimbursement by the
Company in its discretion.

     9.6 Without limiting the rights of the Trustee as otherwise provided in
this Agreement, pursuant to direction by the Committee, the Trustee shall pay
from the Trust Fund expenses of the Plan or compensation to parties providing
services to the Plan including but not by way of limitation, expenses or
compensation related to actuarial, legal, accounting, office space, printing,
computer, recordkeeping, investment, performance evaluation or any other
material or service provided to the Plan.

     9.7 The Company has allocated fiduciary responsibility among various
persons and entities in accordance with the terms of the Plan and this
Agreement. Except as provided herein, the Trustee shall have no responsibility
for any error or loss that results by reason of the exercise or non-exercise of
fiduciary responsibility which is not allocated to the Trustee hereunder and the
Company (which has the authority to do so under the laws of the state of its
incorporation) agrees to hold harmless and indemnify the Trustee from any
liability, loss and expense, including reasonable attorneys fees, which it
incurs to the extent the liability, loss or expense is a direct result of such
exercise or non-exercise of fiduciary responsibility by the person or entity to
which it is allocated; provided, however, the Trustee shall not be so
indemnified to the extent such liability, loss or expense is a result of a
breach by the Trustee of a duty specifically allocated to it by the terms of
this Agreement or the Trustee's negligence in carrying out such a duty or to the
extent the Trustee participated knowingly in a breach, or knowingly undertook to
conceal an act or omission of another fiduciary, knowing such act or omission
was a breach of fiduciary responsibility by such fiduciary. This Section 9.7
shall survive the termination of this Agreement.

     9.8 The Trustee hereby agrees to hold harmless and indemnify the Company
from and against any liability, loss or expense, including reasonable attorneys
fees which it incurs

                                       13
<PAGE>

to the extent the liability, loss or expense was a direct result of a breach by
the Trustee of a duty specifically allocated to it by the terms of this
Agreement or the Trustee's negligence in carrying out such a duty or to the
extent the Trustee participated knowingly in a breach, or knowingly undertook to
conceal an act or omission of another fiduciary, knowing such act or omission
was a breach of fiduciary responsibility by such fiduciary. This Section 9.8
shall survive the termination of this Agreement.

     9.9 For purposes of the foregoing, the Trustee shall not be deemed to have
participated knowingly in a breach, or knowingly undertook to conceal an act or
omission of another fiduciary, knowing such act or omission was a breach of
fiduciary responsibility by such fiduciary, by merely complying with the
authorized directions of an Investment Adviser or by its failure to act in the
absence of such authorized direction or by reason of maintaining accounting
records or solely as a result of the normal information received by the Trustee
or its officers, employees, or agents in the normal course of performing any
custodial, reporting, recording and bookkeeping functions with respect to any
assets of the Trust Fund managed by an Investment Manager or the Investment
Subcommittee. This Section 9.9 shall survive the termination of the Agreement.

     9.10 Notwithstanding any other provision of this Agreement, in no event
shall the Trustee or the Company be liable for any incidental or consequential
damages of any nature.

     9.11 Neither the Company, the Committee nor the Investment Subcommittee
shall direct the Trustee to cause any part of the Trust Fund to be diverted to
any purpose other than the exclusive benefit of the Participants and
Beneficiaries and for defraying the reasonable expenses of administering the
Plan or, except as otherwise permitted under the Plan and under ERISA, to be
remitted to the Company or a Subsidiary.

     9.12 Any person dealing with the Trustee shall not see to the application
of any money paid or property delivered to the Trustee or inquire into the
provisions of this Agreement or of the Plan or the Trustee's authority
thereunder or compliance therewith, and may rely upon the statement of the
Trustee that the Trustee is acting in accordance with this Agreement.

     9.13 Except as otherwise directed by the Committee, which direction shall
be in compliance with all applicable provisions of the 1984 Retirement Equity
Act, the relevant Plan and Section 401(a)(13) of the Code, any interest of a
Participant or Beneficiary in the Trust Fund or the Plan or in any distribution
therefrom shall not be subject to the claim of any creditor, any spouse for
alimony or support, or others, or to legal process, and may not be voluntarily
or involuntarily alienated or encumbered.

     9.14 The Trustee shall not be responsible for any delay in performance, or
non-performance, of any obligation hereunder to the extent that the same is due
to forces beyond its reasonable control, including but not limited to delays,
errors or interruptions caused by the Company, the Committee, the Investment
Subcommittee or third parties, any industrial,

                                       14
<PAGE>

juridical, governmental, civil or military action, acts of terrorism,
insurrection or revolution, nuclear fusion, fission or radiation, failure or
fluctuation in electrical power, heat, light, air conditioning or
telecommunications equipment, or acts of God.

     9.15 In case any provision of this Agreement shall be held illegal or
invalid for any reason, the illegality or invalidity shall not affect the
remaining provisions of this Agreement, but shall be fully severable, and the
Agreement shall not be construed and enforced as if said illegal or invalid
provisions had never been inserted herein. This Agreement supersedes and
replaces any prior agreements with respect to the subject matter hereof.

     9.16 This Agreement may be executed in any number of counterparts, each of
which shall be deemed an original, and the counterparts shall constitute one and
the same instrument.

                          ARTICLE TEN:  GOVERNING LAW

     The provisions of ERISA and the internal laws of Illinois shall govern the
validity, interpretation and enforcement of this Agreement, and in case of
conflict, the provisions of ERISA shall prevail.

     IN WITNESS WHEREOF, the Company and the Trustee have executed this
Agreement by their respective duly authorized officers effective as of the day
and year first above written.

                                       15
<PAGE>

                                  FMC CORPORATION

ATTEST:                           By: /s/ Michael W. Murray
                                      __________________________________

/s/ Lori A. Lenard                Its: Vice President H.R.
_________________________              _________________________________
Lori A. Lenard
Assistant Secretary

     The undersigned, Stephan F. Gates, does hereby certify that he is the duly
elected, qualified and acting Secretary of FMC Corporation (the "Company") and
further certifies that the person whose signature appears above is a duly
elected, qualified and acting officer of the Company with full power and
authority to execute this Trust Agreement on behalf of the Company and to take
such other actions and execute such other documents as may be necessary to
effectuate this Agreement.

/s/ Stephen F. Gates
_________________________
Senior Vice President, General Counsel
Secretary
FMC Corporation

                                  THE NORTHERN TRUST COMPANY

ATTEST:                           By: /s/ Curtis Pence
                                      __________________________________

/s/ Ronald Szafranski
_________________________         Its: Vice President
                                       __________________________________

                                       16<PAGE>

                                                                  Exhibit 10.6.b

                                   AMENDMENT
                                    TO THE
                                FMC CORPORATION
                       DEFINED BENEFIT RETIREMENT TRUST

     THIS AGREEMENT is made effective as of the 30th day of April, 2001 by and
between FMC CORPORATION (the "Company"), a Delaware corporation, and THE
NORTHERN TRUST COMPANY, an Illinois corporation of Chicago, Illinois (the
"Trustee");

     WHEREAS the Company and the Trustee executed the FMC Corporation Defined
Benefit Retirement Trust (the "Trust") dated the 2nd day of October, 2000; and

     WHEREAS the Company and the Trustee desire to amend the Trust pursuant to
Article Eight;

     NOW, THEREFORE, the sections of the Trust set forth below are amended as
follows, effective as of May 1, 2001, except as otherwise provided below, but
all other sections of the Trust shall remain in full force and effect.

1.   The following language is hereby inserted into the third paragraph between
"date of this Agreement" and ", all investments and reinvestments thereof":

     "or hereafter acquired by the Trustee as Trustee in connection with a Plan
     for which this Agreement is adopted as the funding medium,".

2.   The language "the Plan" is hereby replaced with "a Plan" in Sections 1.1,
1.12, 2.1, 9.3 in the sixth line, and 9.6.

3.   The language "the Plan" is hereby replaced with "each Plan" in Sections
1.3, 5.1, 9.3 in the third line, and 9.7.

4.   The sixth line of Section 1.9 is hereby amended to replace "for assuring
that the Plan does not violate any provisions of" with "for assuring that no
Plan violates any provisions of".

5.   Section 1.13 is hereby amended in its entirety as follows:

          "1.13 "Plan" means a retirement plan which has been established by the
     Company or by a Subsidiary and for which this agreement has been adopted as
     the funding medium;".

6.   Effective as of October 2, 2000, Section 1.16 is hereby amended to delete
"Separate Investment Trust Account" and replace it with "Separate Investment
Account".
<PAGE>

7.   Section 1.25 is hereby added as follows immediately following Section 1.24:

          "1.25 "Company Stock" means common stock of the Company, and common
     stock of FMC Technologies, Inc. prior to the date upon which shares of FMC
     Technologies, Inc. common stock are no longer "qualifying employer
     securities" for purposes of section 407 of ERISA. It shall be the sole
     responsibility of the Investment Subcommittee to determine whether the
     shares of common stock of FMC Technologies, Inc. are "qualifying employer
     securities" under ERISA;".

8.   Section 1.26 is hereby added as follows immediately following Section 1.25:

          "1.26  "Plan Account" means the interest of each Plan in the Trust
     Fund;".

9.   Section 2.1 is hereby amended to insert the following language between "in
such amounts" and ", at such times":

     "(but not exceeding the then value of the Plan Account to which the
     distribution is chargeable)".

10.  Section 5.5 is hereby amended in its entirety to read as follows:

          "5.5 (a) The Investment Subcommittee shall have the sole investment
     responsibility with respect to the retention, sale, purchase or voting of
     any Company Stock other than Company Stock which has been allocated to a
     Separate Account over which the Investment Subcommittee has delegated
     investment responsibility to an Investment Adviser. The Trustee shall have
     custody of such Company Stock and shall act with respect thereto as
     directed by an Investment Adviser of a Separate Account holding Company
     Stock or the Investment Subcommittee with respect to Company Stock in a
     Company Stock Account. The Trustee shall not make any investment review of,
     consider the propriety of holding or selling, or vote any such Company
     Stock. With respect to such Company Stock, the Investment Subcommittee
     shall have the investment powers granted to the Trustee by ARTICLE FOUR as
     limited by Section 5.1 and Section 5.2 of ARTICLE FIVE, as if all
     references therein to the Trustee referred to the Investment Subcommittee.
     No provision of this Section 5.5 shall prevent the Trustee from taking any
     action with respect to the voting or tender of such Company Stock if the
     Trustee determines in its sole discretion that such action is necessary in
     order for the Trustee to fulfill its fiduciary responsibilities under
     ERISA;

          (b) In the event that shares of common stock of the Company held in
     the Company Stock Account receive a distribution of common stock of FMC
     Technologies, Inc. ("FTI Stock"), such FTI Stock shall be held in a
     Separate Investment Account for which the Investment Subcommittee shall
     have investment responsibility as provided for in ARTICLE THREE.

                                       2
<PAGE>

          (c) In the event that the Investment Subcommittee determines that FTI
     Stock is no longer a "qualifying employer security" for purposes of section
     407 of ERISA, a Company Stock Account composed of investments in FTI Stock
     shall become a Separate Investment Account for which the Investment
     Subcommittee shall have investment responsibility as provided for in
     ARTICLE THREE.

          (d) If the Investment Subcommittee or its designee determines to swap
     shares of FTI Stock with another trust or to enter into non-market trades,
     it shall direct the Trustee with respect to the terms and conditions of
     such trades."

11.  The language "the Plan" is hereby replaced with "any Plan" in Sections 9.3
the first line, 9.12 and 9.13.

12.  The fourth line of Section 9.11 is hereby amended in its entirety to read
as follows:

     "expenses of administering a Plan or, except as otherwise permitted under
     the affected Plan and under"

13.  The following new Article Eleven is hereby added immediately following
Article Ten:

                  "ARTICLE ELEVEN:  VALUATION AND ALLOCATION

          The Trustee shall hold the Trust Fund as a commingled fund or
     commingled funds in which each separate Plan shall be deemed to have a
     proportionate undivided interest in the fund or funds in which it
     participates, except that each fund or asset identified by the Committee as
     allocable to a particular Plan Account, herein referred to as an
     "identified fund" or "identified asset", and income, appreciation or
     depreciation and expenses attributable to a particular Plan Account or to
     an identified asset thereof, shall be allocated or charged to that Plan
     Account. Contributions shall be designated by the Committee as allocable,
     and distributions shall be designated by the Committee as chargeable, to a
     particular Plan Account and shall be so allocated or charged. Upon the
     direction of the Committee the Trustee shall periodically determine the
     value of each Plan Account on such basis as the Trustee and the Committee
     shall from time to time agree (considering the fair market value of the
     assets initially received from the predecessor trustee or the Company with
     respect to the Plan and subsequent contributions and distributions, net
     income, net appreciation or depreciation and expenses attributable to the
     Plan) and shall render a statement thereof to the Committee within sixty
     (60) days after each valuation date."

                                       3
<PAGE>

     IN WITNESS WHEREOF, the Company and the Trustee have caused this Amendment
to be executed and attested by their respective corporate officers effective on
the day and year first written above.

                                       FMC CORPORATION
                                       By:  /s/ Stephen F. Gates
                                            ______________________________
                                       Its: Senior Vice President,
                                            General Counsel and
                                            Secretary

ATTEST
/s/ Lori A. Lenard
_________________________
Its:  Assistant Secretary

The undersigned, Steven H. Shapiro, does hereby certify that he/she is the
duly elected, qualified and acting Secretary of FMC Corporation (the "Company")
and further certifies that the person whose signature appears above is a duly
elected, qualified and acting officer of the Company with full power and
authority to execute this Amendment on behalf of the Company and to take such
other actions and execute such other documents as may be necessary to effectuate
this Amendment.

/s/ Steven H. Shapiro
_________________________
Assistant Secretary
FMC Corporation
                                       THE NORTHERN TRUST COMPANY
                                       By:  /s/ M. Curtis Pence
                                            _____________________________
                                       Its: Vice President

ATTEST:

_________________________
Its:  Assistant Secretary

                                       4

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