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#2 0 ,-/2 4 3 Toxicological Summary PFOS Dietary Acute Northern Bobwhite Study Test Substance: Perfluorooctanesulfonate (PFOS) Structure: 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, CAS# 2795-39-3 Remarks: The test substance is a white powder (3M lot #217).

Biennial Report for the Manufacture of APFO Calendar Years of 2002 and 2003 DuPont Company - Fayetteville Work Page 1 of 4 /87& Biennial Report for the Manufacture of APFO Calendar Years of 2002 and 2003 DuPont Company - Fayetteville Works Note: The information contained in this document is submitted voluntarily and may be subject tofuture revision and/or modification.

The miracles o f science 05FEB-9 AH!!

AR226-2251 Catherine A Barton ^ 01/30/2002 05:12 PWI To- Mark H Russell/AE/DuPont@DuPont cc: Robert F Pinchot/DEV/AE/DuPont@DuPont, Andrew S Hartten/AE/DuPont@DuPont, Theodore H Carski/AE/DuPont@DuPont Subject: Re: Draft modeling report D Mark, Thanks so much for your great work.

Ohio EPA December 2,2003 ks o to CO o Ul AR226-2350 EXP01582Q O b jectives Provide grounding/update on recent activities Solicit input on upcoming activities 'H****** 8O1000 o <j\ EXP015821 Agenda Water - GIST Final Report Recommendations - Proposed MOU Based on GIST Recommendations - OEPA Requests - DuPont Suggested Modifications Air - Review Recent M odel Results g - Air Permit Update I - Additional Reduction Programs - Air Model Verification Plan EXP015822 Proposed Memorandum of Understanding-West Virginia DEP and Ohio EPA Summary of Activities December 2, 2003 m oxo cUol ASH028048 GIST Report Recommendations Summary Final GIST report issued August, 2003 Continued quarterly/annual monitoring of certain Ohio River public water systems Quarterly/annual monitoring of private water supplies (10 locations) in West Virginia and Ohio - West Virginia: Wash Works 0-2 mile radius and Dry Run Landfill/Letart Landfill 1-mile radius - Ohio: Wash Works 0-2 mile radius - List to include wells, springs, cisterns Conduct C8 monitoring at all DuPont Washington Works facilities according to applicable West Virginia Solid Waste/NPDES, NPDES, g and EPA HSWA (Corrective Action) permit requirements to GO o EXP015824 Proposed MOU -Administrative Details Parties: - West Virginia Department of Environmental Protection - West Virginia Department of Health and Human Resources - Ohio Environmental Protection Agency - E.I. du Pont de Nemours & Company i Objectives: - Continued monitoring and reporting of C8 concentrations in groundwater and surface water - Implement recommendations of the GIST concerning continued sampling and monitoring in WV & Ohio ("in and around the g facilities") g00 - Begin first quarter 2004 o w o E X P 0 1 5825 Proposed MOU -Public Water Syste II Sampling WV Public Water Systems: - Quarterly sampling 1Q2004-4Q2005 at Lubeck PSD, DuPont WW, and GE production wells and finished water (if applicable) - Annual sampling 2004-2005 at Blennerhassett Island State Park, Mason Cty.

AR226-2509 # # Stephen R Peck 03/07/2002 08:21 PM To: Yasu Shibuta/SE/DuPont@DuPont cc: Ta-Wei Fu/SE/DuPont@DuPont, Mohammad Rezaei/SE/DuPont@DuPont Subject: Procedure for Analytical Determination of APFO Procedure for Analytical Determinatior EDD0042621

AR226-3162 DuPont-2932 TRADE SECRET Study Title H10-2-D40o4se3:OBrailoGpearvsaisgteenScteudSycrieneRniantgs Laboratory Project ID: DuPont-2932 Author: Carol Finlay, B.A.

TRADE SECRET AR226-3177 DuPont-6087 Study Title H-24516: Skin Irritation Test in Rabbits Laboratory Project ED: DuPont-6087 Author: Carol Finlay, B.A.

AR226-3214 DuPont-8863 TRADE SECRET Study Title H-25134: Influence on Growth and Growth Rate of the Green Alga Selenastrum capricornutum Laboratory Project ID: DuPont-8863 A u t h o r : Terry Lee S lo m a n , B .S .

3RMeguCloartoproyraSteervTiocxeiscology and 3M Center, Building 0220-06-E-03 St.

3Afl A&2S16- $S7Z 3M ENVIRONMENTAL LABORATORY PROJECT NO.E05-0442 Analytical Report Definitive Study: Quantitative Screening of Commercial Lots of Human Serum Obtained in 2004 for Endogenous Fluorochemicals Using Solid Phase Extraction and Liquid Chromatography/Tandem Mass Spectrometry Laboratory Request Num ber EQ5-0442 Testing Laboratory 3M Environmental Health and Safety Operations 3M Environmental Laboratory' _________________ _ _ _____________________________________________ ;_________ _ 3M Environmental Laboratory Project Lead Mark E.

A fL a a _ 3 T 2 7 # Ui \ DuPont Legal Andrea V Malinowski, Es.4-^ 2h l o: 5 9 Wilmington Office Buildings 1007 Market Street Wilmington, DE 19898 Corporate Counsel DuPont Environmental 1007 Market Street & fy o 10 6- 743^ Wilmington, Delaware 19898 Phone: (302) 774-6443 Fax: (302) 774-4812 E-mail address: Andrea.V.Malinowski@usa.dupont.com CONTAIN NO CBI 3 CTJ CT** C-- 6 January 2006 7 \f r VIA OVERNIGHT MAIL TSCA Confidential Business Information Center (7407M) EPA East - Room 6428 Attn: Section 8(e) U.S.

K ath erin e E.

\6YY p.1 m i 2 6 - 3733 July 28, 2006 u c ; QO 05 HUG - 1 " " D ' DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P.O.