BIOCONCENTRATION - REVISED 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 number217.

Azas- 1750 Laboratory Rep-- o Revr isiton 1 Analytical Report of Data for PFOS Dietary LC50 Study in Northern Bobwhite (Sera and Liver) Laboratory Report No.

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AR226-2253 / Debbie J Mulrooney 01/30/2002 06:13 PM To: cc: Subject: Robert F Pinchot/DEV/AE/DuPont@DuPont Re: Watershed Deposition Results D Rob, The areas are: Little Hocking - 2.57 km2 Lake Washington - 2.8 km2 Robert F Pinchot 01/30/2002 10:38 AM __ Robert F Pinchot 01/30/2002 10:38 AM To: cc: Subject: Debbie J Muli-ooney/AE/DuPont@DuPont Re: Watershed Deposition Results Q Debbie, Thanks a bunch.

AR226-2289 Robbin Banerjee muai/uM4i/um^ Un72..'

AR226-2294 DRAFT 3 DuPont Statement on January 7, 2003, Letter from Ohio EPA Regarding "Air impacts in Ohio due to emissions of C8" In a January 7, 2003, letter to Paul Bossert, Plant Manager at DuPont Washington Works, Ohio EPA Director Christopher Jones refers to "concern over ambient levels of C8, as predicted by air quality modeling of year 2000 actual emissions."

AR226-2315 /y Charles J Zarzecki 03/19/2003 11:31 AM To: cc: Subject Catherine A Barton/AE/DuPont WVC8 Modeling Cathie, I took a look at the location of the maximum predictions in the VW C8 modeling summary.

AR226-2481 Roger J Zpfel 11/08/2000 02:35 PM To: cc; Subject: shamrockl wirefire.com Results from extraction studies Jeff.

: ARR26. 2724 PATTONBOGES.

From: To: Sent: Subject: McCrory Dennis M NSSC Merten Thomas M NSSC; #NSSC SEA05L4 6/15/2001 6:33:08 PM Highlight AFFF environmental issues.

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ok PP AR226_ 113] REVISED DRAFT HAZARD ASSESSMENT OF PERFLUOROOCTANOIC ACID AND ITS SALTS U.S.

Little Hocking Water Association, Inc.