Page 1 FINAL REPORT Epidemiology, 220-3W-05 Medical Department 3M Company St.

A Pharmacokinetic Study of Potassium Perfluorooctanoate in the Cynomolgus Monkey Southern Research Institute Study ID: 9921.4 January 14,2003 Final Report on A Pharmacokinetic Study of Potassium Perfluorooctanoate in the Cynomolgus Monkey To: 3M Corporation P.O.

FINAL REPORT ONE GENERATION REPRODUCTION STUDY OF PFOS - MEVALONIC ACID/CHOLESTEROL CHALLENGE AND NOEL INVESTIGATION IN RATS SPONSOR'S STUDY NUMBER: T-6295.25 FINAL REPORT DATE: 16 DECEMBER 2002 TITLE - ONE GENERATION REPRODUCTION STUDY OF PFOS - MEVALONIC ACIDKHOLESTEROL CHALLENGE AND NOEL INVESTIGATION IN RATS ARGUS STUDY NUMBER: 4 18-018 SPONSOR'S STUDY NUMBER: T-6295.25 TABLE OF CONTENTS SUBJECT PAGE I.

3M Strategic Toxicology Laboratory Study Title: Acute Inhalation T.oxicokinetic Study of Perfluoroctanesulfonyl Fluoride (POSF) T-7098.4 Test Number (sample): T-7098.4 (Perfluoroctanesulfonyl Laboratory Project Identifi'cation: ST64 In-Life Initiation Date: 5/1/2001 In-Life Completion Date: 5/14/2001 Research Client: 3M Specialty Materials Division 3M Center Building 236 Saint Paul, MN 55133-3220 Fluoride (POSF) Testing Laboratory: 3M Strategic Toxicology Laboratory 3M Center Building 270-SB- 181 Saint Paul, MN 55133-3220 Study Director: Andrew M.

ldlife International, Ltd.

AR226-2010 C-8 BLOOD DATA (WASHINGTON WORKS) STATUS OF EMPLOYEES AS OF: ^0.5 PPM ^ 1.0 PPM ^ 5.0 PPM ^ 10 PPM >10 PPM BASE DATA 1984-1986 (108 PEOPLE) 22% (24) < 67% 92% 97% 3% (73) (100) (105) (3) 1987 (31 PEOPLE) 1988 (28 PEOPLE) 1987-1988 COMBXNED (58 PEOPLE) 1989 (41 PEOPLE) 26% (8)' 43 (12) 34% (20) 34% (14) 39% 87% 97% 3% (12) (27) (30) (1) 61% 93% 100% 0% (17) (26) (28) 50% 90% 100% 0% (29) (52) (58) 59% 83% 98% 2% (23) (34) (40) (1) 0 THIS DATA IS ONLY USEFUL TO PROVIDE A GENERAL OVERVIEW (A SNAPSHOT IM TIME). 0 NOT USEFUL FOR TRENDS BECAUSE OF PEOPLE MOVEMENT, AND THE COMPOSITION OF PEOPLE TESTED CHANGES EACH YEAR, H.

AR226-2048 ^ Ta-Wei Fu 07/30/2001 08:01 AM To: cc: Subject John E Crum/SE/DuPont@DuPont Ta-Wel Fu/CL/DuPont@DuPont, Roger J 2ipfel/AE/DuPont@DuPont Re: C-8 sampling D John, Maybe I did not make my points clear on the phone so I would like to clarify it here: 1.

AR226-2223 Mary A Kaiser jf 12/04/2001 03:03 PM II TlW -^.

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

AR226-2361 September 2002 Through August 2003 Air Dispersion Modeling Analysis ofAPFO Emissions (Revised) May 24,2004 Page 1 of 9 SEPTEMBER 2002 THROUGH AUGUST 2003 AIR DISPERSION MODELING ANALYSIS OF APFO EMISSIONS .- _..-_ -_... -..--_^-_ __.---__--.-..

AR226-2550 DuPont Washington Works RCRA Facility Investigation Results Review Oct.28,1999 * * * * IID156232 Proposed Agenda Introductions Site Background Site Hydrogeology RFI Scope of Work RFI Results Conclusions and Recommendations Wrap-Up EID156233 Desited Meeting Outcomes To familiarize the EPA project team with the Washington Works site physical setting To share the results obtained from the recently completed RCRA Facility Investigation To provide perspective on the RFI results To propose a path forward that will ensure continued protection of human health and the environment SID156234 Main Messages for Today: The DuPont Washington Works site is well characterised and well understood, as a result of over 10 years of investigation and monitoring, The combination of TRMs and the active site hydraulic control program ensure protection of human health and the environment from site SWMUs.

AR226-2583 Document 12 of 25 ASH018251 EID521411 I ^ I I I C-8 PLUME IDENTIFICAT10N/GROUNDWATER I ASSESSMENT WORK PLAN I DUPONT WASHINGTON WORKS FACILITY AND LOCAL, LETART AND I DRY RUN LANDFILLS I I I Dates May 2002 I Project No.; D6WW7423 I ^ I CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond I Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 I I I ASH018252 EID521412 I C-a Plums IdenflfledUon/GioundwatBr Assessment Wotk Plan __Introduction y TABLE OF CONTENTS 1.0 Introduction.......................................................................................................... 2 1.1 Document Organization..--......,........--........-,......--... .....,,..............,,..,,..-- ...,...3 1 2 . 12.0 Washingtoii Works Facility.....................................................................,.......,.,.,.4 Key Findings..............................................................................................4 2.2 Data Gaps,............................................................................................... ,.5 2.3 Summary--Recommended Activities to Fill Data Gaps.................................. 5 2.4 Detailed Justification..............................................................................6 1 1| H ^ 3 4 . . 3.0 Local LandfilL..................,.,..................,..,......................................-..........,.............8 KayFhldings.......................,,...................,...................,.................,..................,8 3.2 Summary--Recommended Activities to Fill Local Landfill Data Gaps ...........9 3.3 Detailed Justification................................................................................ 10 14.0 Letart Landfill...................................................................................................... 12 4.1 Key Findings--Letart Landfill.......................................................,...,,...,...12 Data Gaps for the Letart Landfill.........,................-...................,,.............,.....13 4.3 Summary--Recommended Activities to Fill Letart Landfill Data Gaps,.,......13 4.4 Detailed Justification .......,,,,.,,....................................................................14 25.0 Dry Run LandfiU...........................,.....,.....................................................-,.,...........16 5.1 Key Findings--Dry Run Landfill............................................................ 16 5.2 Summary--Data Gaps for the Dry Run Landfill............,,.,,,...............,.,,........]?

^ < GIST meeting notes May 15,2002 AR226-2585 Minutes from the C-8 DuPont meeting May 15,2002 The meeting began at approximately 10:20 am.

AR226-2593 Mark Houlday 08/1S/2002 12:44:54 PM To: cc: Subject: Isidores J Zanikos/AE/DuPont@DuPont Andrew S Hartten/AE/DuPontQDuPont Washington Works Talking Points Izzy here are some topics that you may wish to discuss: GIST Meeting - went well.