FMC Corporation Quarterly Report on Form 10-Q for September 30, 1999 Exhibit 15 Letter re: Unaudited Interim Financial Information -------------------------------------------------- FMC Corporation Chicago, Illinois Ladies and Gentlemen: Re: Registration Statements No. 33-10661, No. 33-7749, No. 33-41745, No. 33-48984, No. 333-18383, No. 333-24039, No. 333-69805 and No. 333-62683 on Form S-8 and Registration Statement No. 33-59543 on Form S-3. With respect to the subject registration statements, we acknowledge our awareness of the incorporation by reference therein of our report dated October 13, 1999 related to our review of interim financial information. Pursuant to Rule 436(c) under the Securities Act of 1933, such report is not considered part of a registration statement prepared or certified by an accountant or a report prepared or certified by an accountant within the meaning of Sections 7 and 11 of the Act. Very truly yours, KPMG LLP Chicago, Illinois November 15, 1999