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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.

ENVIRONMENTAL ENGR.

BACK TO MAIN MELTING POINT TEST SUBSTANCE Identity: Decafluoro(pentafluoroethyl)cyclohexanesulfonate, DEA salt; may be referred to as CS-2070.

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.

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NMSQ RELEASE A12125926 6- Minnesota Pollution Control Agency www.pca.state.mn.us Toll-free and TDD 1 (800) 857-3884 Saint Paul l Brained l Detroit Lakes 0 Duluth l Mankato 0 Marshall l Rochester 0 Willmar FOR RELEASE: May 9,200s MPCA Media Contact: Michael Rafferty, (65 1) 297-8294 MDH Media Contact: Tannie Eshenaur, (651) 215-0916 MPCA Technical Contact: lngrid Verhagen, (651) 296-7266 MDH Technical Contact: Jim Kelly, (651) 215-0913 GROUND-WATER INVESTIGATION CONTINUES TO FIND PFCS AT LOW LEVELS IN LAKE ELM0 PRIVATE WELLS AS FOUR TEST ABOVE HEALTH-BASED CRITERIA St.

AR226-2090 61 6 a 5"~ 61^ S ;- * 0 3 0 5 A: 00 a> 0 M 5 ^. 1 tO 01 CT oi i a [ 01 m !

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!

AR226-2332 y Charles J Zarzecki 04/11/2003 03:49 PM To: cc: Subject: Catherine A Barton/AE/DuPont Wash Works Modeling Cathie, Not as easy as I thought it would be.

AR226-2365 Manage Existing C-8 Products and Processes The meeting will be held at 8:00 am on April 2, 1998 in CBP 702-1242 (contact is Pinchot) with an audio connection/to MM (B21 Downstairs Small CR % 883-3615, contact is Chapman) and Rik Brandenburg at OH (947-1648).

-0027722.txt AR226-2374 In the follow-up to a finding at Dordrecht, we analyzed the No. 2 .Wet f inishing line every 30 minutes for 2 hrs for .