Exhibit 99.3

Jonathan G. Katz
Secretary
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, DC 20549

     Statement Under Oath of Principal Executive Officer Regarding Facts and
                 Circumstances Relating to Exchange Act Filings

  I, William G. Walter, state and attest that:

        (1) To the best of my knowledge, based upon a review of the covered
        reports of FMC Corporation, and, except as corrected or supplemented in
        a subsequent covered report:

            .    no covered report contained an untrue statement of a material
                 fact as of the end of the period covered by such report (or in
                 the case of a report on Form 8-K or definitive proxy materials,
                 as of the date on which it was filed); and

            .    no covered report omitted to state a material fact necessary to
                 make the statements in the covered report, in light of the
                 circumstances under which they were made, not misleading as of
                 the end of the period covered by such report (or in the case of
                 a report on Form 8-K or definitive proxy materials, as of the
                 date on which it was filed).

        (2) I have reviewed the contents of this statement with the Company's
        audit committee.

        (3) In this statement under oath, each of the following, if filed on or
        before the date of this statement, is a "covered report":

            .    The Annual Report on Form 10-K of FMC Corporation for the year
                 ended December 31, 2001 filed with the Commission on March 14,
                 2002;

            .    all reports on Form 10-Q, all reports on Form 8-K and all
                 definitive proxy materials of FMC Corporation filed with the
                 Commission subsequent to the filing of the Form 10-K identified
                 above; and

            .    any amendments to any of the foregoing.

Signature: /s/ William G. Walter                      Subscribed and sworn to
           -----------------------------              before me this 14th day of
                William G. Walter                     August 2002.

Date: August 14, 2002
      ---------------------------------

                                                      /s/ Mary Ellen DiVito
                                                      --------------------------
                                                      Commissioner of Deeds

                                                      My Commission Expires:
                                                      April 20, 2004