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TELOMER RESEARCH PROGRAM 1200SouTetth( HayesT SroetDSA5vi4n.gFonn, VBirgAie 2I2025060 |4 [ESI =S Clariant WIR February 14.2003 8ZE z otn Mary F.

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AR226-1539 ATTACHMENT 1 YEAR 2002 AIR DISPERSION MODELING ANALYSIS OF APFO EMISSIONS DuPont Washington Works Facility Parkersburg, West Virginia RECEIVED OPPT NCIC 2003 October 31 8:25AM Prepared by: DuPont Engineering Technology (DuET) Environmental Section Wilmington, DE 19898 October 17, 2003 Year 2002 Air Dispersion Modeling Analysis October 17, 2003 Page 2 1.

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Ar226 - 0637 ACUTE TOXICITY TO AQUATIC INVERTEBRATES (COROPHIUM'VOLUTATOR) EST SUBSTANCE Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95 or as a component of FC-201AF. (1`Octanesulfonic acid) (CAS # 2795-39-3).

Ip AR 226 0935 DaiA nipron Tokar & Clrermi_ cnls_ , Inc. 12TangoTakai.

150 ff AR 226- 0947 Telomer Research Program 2 Update and Status Report : Presented to U.S.

BACK TO MAIN Executive Summary of Photolysis Studies 3M has completed a series of studies of the direct and indirect photolytic reactions of four materials; Table 1 lists the materials, their chemical abbreviations, and the relevant 3M report numbers.

BACK TO MAIN TOXICITY TO AQUATIC PLANTS (Marine Diatom, Skeletonema costatum) 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: Sample from 3M production lot number 217.

STUDY TITLE Extraction of Potassium Perfluorooctanesulfonate from Quail Serum and Quail Liver for Analysis Using HPLC-ElectrosprayMass Spectrometry DATA REQUIREMENTS Analytical Method Requirements STUDY DIRECTOR Sean Gallagher STUDY COMPLETED ON September 06,2001 -F'ERFORMING LABORATORY / TESTING FACILITY Centre Analytical Laboratories, Inc.

AR226-2180 Robert F Pinchot 08/22/2001 11:22 AM To: cc: Subject: David M Rural</AE/DuPont@DuPont Bernard J Reilly/AE/DuPont@DuPont, Robert L Ritchey/CUDuPontQDuPont, Paul J Bossert/AE/DuPont@DuPont, Gerald L Kennedy/AE/DuPont@DuPont, Isidores J 2anikos/AE/DuPont@DuPont, Andrew S Hartten/AE/DuPont@DuPont.

AR226-2195 ^ David M Rurak 08/28/2001 07:59 AM To: cc: Subject: Ta-Wei Fu/SE/DuPont@DuPont Stephen J Gissy/AE/DuPont@DuPont Oscar T Garza/AE/DuPont@DuPont, Fred M Lentz/SE/DuPort@DuPont, Robbin Banerjee/AE/DuPont@DuPont, Paul K Mathur/CUDuPont@DuPont, Raymond C Butterworth/CL/DuPont@DuPort, John R Flynn/AE/DuPontQDuPont, Amy L Brown/AE/DuPontQDuPont, Thomas W Mahlberg/SE/DuPont@DuPont, Robert F P!