AR226-2327 Air Emissions Modeling Plan Air dispersion modeling will be performed to calculate ambient ground-level air concentrations ofC8 emissions from the Chambers Works site.

P. 1 ~tZ226-3'7 MP( 3a3 65-5- o~~ O' ~ Apri12 200 7 ~ r' i~ i" +` . r LL> ()~ i,~ DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P .O .

Taft/ Taft Stettinius & Hollister LLP 425 Walnut Street, Suite 1800/ Cincinnati, OH 45202-3957 / Tel : 513 .381 .2838 / Fax : 513 .381 .0205 /www.taftlaw.com Cincinnati / Cleveland / Columbus / Dayton / Indianapolis / Northern Kentucky / Phoenix / Beijing ROBERT A BILOTT 513.357 .9638 bilott@taftlaw.com ~-1 "a - 01Dr 37 S ~~.aa~-3~g~ March 20, 2009 ~f~ 3f ~ ( f~ TSCA Confidential Business Information Center (7407M) I EPA East - Room 6428, Attn: Section 8(e) & FYI U.S.

3 Final Report Study Title Anaerobic Biodegradability Testing of the Perfluoroalkyl Substances PFOS, PFBS, PFOA, PFBA, MeFBSE, EtFOSE, 6:2-FTS, 6:2 FTOH and 8:2 FTOH, and also 246-Trichlorophenol and Pentachlorophenol Data Requirement Exploratory/Method Development Author Cleston C.

FINAL REPORT Epidemiology, 220-6W-08.

AR226-2399 COMMUNITY STATUS VATER AIR SOLID WASTE 10635-1 - 03/08/9 - WBCllft EID951507 WASHINGTON WRKS OFF-PLANT EMISSIONS POUNDS C-8 1983 1986 ' 1988 WATER 21,700 19,100 23,300 AIR 12,700 16,200 26,200 PRODUCT 8,000 8,300 11,300 OFF-PLANT DISPOSAL TO CW - VWTP 7,700 TO LETART LANDFILL ____ 8,300 ____ 9,000 2,000 50,100 51,900 71,800 10635-2 - 03/08/t9 - WKCikst EID951508 C-8 LEVELS IN DRINKING WATER DISTANCE FROM NO. 5 OUTFALL {HZLKS) PPB 1984 1987 1988 PARKERSBURG 7.50 UPSTREAM ND ND WASH WORKS 0.50 UPSTREAM ND ND ND LUBECK WATER DISTRICT 0.25 DOWNSTREAM 0.25 DOWNSTREAM 1.1 1.9 1.8 1.5 1.9 1.4 LITTLE HOCKING 3.00 DOWNSTREAM 0.6 ND ND RAVENSVOOD 29.0 DOWNSTREAM ND ND = NOT DETECTABLE 10635-3 - 03/08/89 - WBCflcat EID951509 005>/ 00 0091- 00 ?

AR226-2470 1/25/00 DRAFT Responses to GE questions made by Dale VaaDeVelde on 1/5/00. 7) C-8 storage and use history Dupont Fluoroproducts began the use of Ammonium Perfluorooctanoate, C-8, in the early 1950's.

AR226-2663 53 RESEARCH Proven Results.

Copies to: E.

AR226-2935 % FOR DU PONT USE ONLY Du Pont HLR 801-88 Study Title Skin Irritation Test in Rabbits o Author William J.

LITTLE HOCKING WATER ASSOCIATION, INC. 3998 St.

NORTHERN KENTUCKY SUITE 340 OFFICE 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 606-331-2838 513-381-2838 FAX: 513-381-6613 DAYTON, OHIO OFFICE I - SUITE 900 110 NORTH MAIN STREET DAYTON, OHIO 45402-1786 937-228-2838 FAX: 937-228-2816 ROBERT A.

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3M 3.NiGeneral Offices April21, 2000 3M Center St.Paul,'vt,\5'5144- 1000 612 733 1110 Dr.