89080000216 Re: TSCA 8(e) Substantial Risk Notice: Supplemental to Docket No. 8EHQ-0598-373; Sulfonate-based and Carboxylate-based Fluorochemicals To whom it may concern, 3M is submitting this notice to supplement its previous submissions on sulfonyl-based and carboxylate-based fluorochemicals.

June 25,2009 Via Federal Express NDf1o0eur9wPH0oaeErnaktll,ktHhtDoaaEnsnkRd1el9oEl7aGnd1v,4loiP-rb0o.Oa0nl5.m0CBeeonntxtael5rs0Sciences fy\ir 3 2 .0 0 (0. ?

Case 1:06-cv-01810-RMB-AMD Document 459-7 Filed 09/21/10 Page 1 of 8 PagelD: 21878 v(S0 Si.*, II UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION 2 290 BROADWAY NEWYORK, NY 10007-1866 OCT 2 4 2009 C E R T IFIED MAIL-RETURN RECEIPT RffiOTrF.STff.

Via electronic mail Andrea V.

OFFICE OF INSPECTOR GENERAL Evaluation Report Catalystfor Improving the Environment Continued EPA Leadership Will Support State Needs for Information and Guidance on RCRA Financial Assurance Report No. 2005-P-00026 September 26, 2005 Report Contributors: Steve Hanna Martha Chang Jayne Lilienfeld-Jones Abbreviations ASTSWMO EFAB EPA OIG RCRA TSDF Association of State and Territorial Solid Waste Management Officials Environmental Financial Advisory Board U.S.

J ohn Bel E dwards GOVERNOR JAN 06 O n -I!

3M K atherine E.

Robert A.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION III 1650 Arch Street Philadelphia, Pennsylvania 19103-2029 Mr.