T3eMaCrosrporyosrautevToSxerivics ology and 8S1t7aC5l3e, e17B7eFlaxin40200603 SEHR 120500373 ARARG_ 3872 RECEIVED Certified Mail OSDEC-8 AM 6:05 November 29, 2005 Document Processing Center EPA East - Room 6428 Attn: Section 8(e) Officeof Pollution Prevention and Toxics USEPA 1200 Pennsylvania Avenue NW.

p. 1 TAFT, STETTINIUS & HOLLISTER LL P NORTHERN KENTUCKY OFFICE CLEVELAND, OHIO OFFICE SUITE 340 3500 BP TOWE R 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 425 WALNUT STREET, SUITE 1800 200 PUBLIC SQUARE CLEVELAND, OHIO 44114-2302 606-331-2838 216-241-283 8 513-381-2838 FAX : 513-381-6613 CINCINNATI, OHIO 45202-3957 FAX : 216-241-3707 COLUMBUS, OHIO OFFICE DAYTON, OHIO OFFICE SUITE 900 110 NORTH 513-381-2838 21 EAST STATE STREET : 513-381-0205 COLUMBUS, OHIO 43215-4221 MAIN FS AX TREET 614-221-2838 DAYTON, OHIO 45402-1786 FAX :614-221-2007 937-228-2838 www.taftlaw .co m FAX: 937-228-2816 1-9 c2 a 6 3 ROBERT A . (513) 357-963 8 bilott@taftlaw.com BILOTT !!

Fc-1z9 lo Submitted to: BIOSEARCH.

:- - : 207 am SKaaitfheVriienePr.esRiedeendt, PhD.

BACK TO MAIN BIOCONCENTRATION (PARTITION COEFFICIENT) TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: The test substance is a white powder.

BACK TO MAIN SELECTED FLUOROCHEMICALS IN THE DECATUR, ALABAMA AREA Prepared for: 3M St.

BACK BIODEGRADATION TEST SUBSTANCE Identity: Remarks: Perfluorooctanoic acid, ammonium salt; may also be referred to as PFOA, PFOA ammonium salt, Ammonium perfluorooctanoate, FC-116, FC-126, FC-169, or FC-143.

1 =I=EJ sPsaren in AR2Z6.

. : SE atheros &.Bvt,PD.

Genotoxicity, Carcinogenicity, Developmental Effects and Reproductive Effects of Perfluorooctanoate: A Perspective from Available Animal and Human Studies Prepared for the Association of Plastics Manufacturers of Europe and the Society of the Plastics Industry John L.

eteree see -------------------- Pros AREPRODUCTION STUDY WITH THE MALLARD FINAL REPORT WILDLIFE INTERNATIONAL, LTD.

AR226-2194 ^ Stephen J Gissy 08/28/2001 07:33 AM To: cc: Subject: Ta-Wei Fu/SE/DuPont@DuPont Oscar T Garza/AE/DuPont@DuPont, Fred M Lentz/SE/DuPont@DuPont, Robbin Baneriee/AE/DuPontQDuPont, Paul K.

AR226-2472 Stephen R Peck 03/07/2000 07:48 AM To: cc: Subject: Carey E Cole/CL/DuPont@DuPont, Roger J Zipfe!

\/""_^-^--/ Stephen W Constable_______09/08/2000 11:02 AM To: cc: Subject: William G 0'Brien/AE/DuPont@DuPont Ta-Wei Fu/CL/DuPont@DuPont analytical for C8 I met wilh Ta-Wei Ihis moniiiig and he mentioned (hat you were searching for a method to analyse C8.

AR226-2558 -9 - Andrew S Hartten 05/31/2001 03:29 PM To: cc: Subject; wentworth.wltliaffi@epamall.epa.gov Robert L Ritchey/CL/DuPont@DuPont, Isidores J Zanites/ABDuPont@DuPont, Andrea V Malinowski/AE/DuPont@OuPont, Alison A Crane/A/DuPont@DuPont information on Washington Works Facility Bill, The following provides answers to your questions in the May 23 memo you sent me, which Is attached, Per our conversation today, I'm faxing to you hard copy analytical results and the pertinent portion of the site NPDES permit modification (to add to the original permit which you have).