AR226-1739 STUDY TITLE Extraction of Potassium Perfluorooctanesulfonate from Mallard Serum and Mallard Liver for Analysis Using HPLC-Electrospray/Mass Spectrometry DATA REQUIREMENTS Analytical Method Requirements STUDY DIRECTOR Sean Gallagher STUDY COMPLETED ON September 06, 2001 PERFORMING LABORATORY / TESTING FACILITY Centre Analytical Laboratories, Inc.

A & U lr11*11 CANCER PREVALENCE IN SUBJECTS EXPOSED TO PERFLUOROOCTANONIC ACID (PFOA) # James Dahlgren M D 1, Ayman B Ibrahim M D `" " \ Raphael W arshaw', Harpreet Takhar MPH 1.

Attachment 2 A & lltrlT lX CANCER PREVALENCE IN SUBJECTS EXPOSED TO ALKYLATED SUBSTANCES (PFAS) James Dahlgrsn M D', Ayman B Ibrahim M D1'2' 3, Ray Warshaw2, Karpreet Takhar MPH3 * i .

3M FLUOROCHEMICAL SUBMISSION TOXICOLOGY, EPIDEMIOLOGY AND MEDICAL SURVEILLANCE April 2004 Click on Study Title to View Report April 16, 2004 Butenhoff, J.L., et al., "Characterization of Risk for General Population Exposure to Perfluorooctanoate," Regulatory Toxicology and Pharmacology 39 (2004) 363-380, April 16, 2004

ARX& - 03U BIODEGRADATION TEST SUBSTANCE Identity: Perfluorodecanesulfonate, ammonium salt; may also be referred to as PFDS, FC-120, or 3M Sample J2905-1. (1-Decanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10heneicosafluoro-, ammonium salt, CAS # 67906-42-7) Remarks: Test sample is a mixture of the test substance in water and butyl cellosolve (approximately 25% test substance, 37.5% butyl cellosolve and 37.5% water).

3M Specialty Materials June 15, 2000 3M Center St.

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a \ - ` UiAKr 36 22:ot ' ID:UfiNlKRFfiK3800 Ff: PAGE Z AR226-2021 WASHINGTON WORKS C-B INDUSTRIAL HYGIENE WORK ROLES, PROTECTIVE CLOTHING, RESPIRATORY PROTECTION, ETC, LIQUID C-S AIR MONITORING BLOOD MONITORING RJZ007180 i E ID 1 3 6 9 5 7 \J1S\JS" 30 C.C,-Ol 1 L r-.U IIM iC W H A O 'O O O rH A* PHtat ' 3 WASHINGTON WORKS AIR SAMPLING RESULTS PERSONAL SAMPLES OX - <107.

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AR226-2156 Catherine A Barton A 07/08/2001 04:23 PM To: Robert F Pinchot/DEV/AE/DuPont@DuPont cc: Debbie J Mulrooney/AE/DuPont@DuPont Subject: Rob, I hope you had a nice vacation last week.

AR226-2159 Robert F Pinchot 07/12/2001 12:33 PM To: David M Rurak/AE/DuPont@DuPont, H David Ramsey/SE/DuPont@DuPont, Stephen J Gfesy/AE/DuPont@DuPont, Robert L Ritchey/CL/DuPorrt@DuPont, John J Mentink/CL/DuPont@DuPont, Chris E Shoop/AE/DuPont@DuPont, Bernard J Reilly/AE/DuPont@DuPont, John R Bowman/AE/DuPont@DuPont, Andrea V Maiinowski/AE/DuPont@DuPont, Oscar T Garza/AE/DuPont@DuPont cc: Maurice Astorga/AE/DuPont@DuPont, Debbie J Mulrooney/AE/DuPont@DuPont, Catherine A Barton/AE/DuPont@DuPont Subject: Air dispersion modeling strategy I have talked with a number of people yesterday and today concerning modeling of APFO emissions from Washington Works.

AR226-2163 Chris E S hoop 07/16/2001_ 01:38 PM To: Robert F Pinchot/DEV/AE/DuPont@DuPont, Debbie J Mulrooney/AE/DuPont@DuPont cc: David M RuraWAE/DuPorrt@DuPont, H David Ramsey/SE/DuPont@DuPont, Stephen J Gissy/AE/DuPont@DuPont, Robert L Ritchey/CUDuPont@DuPont, John J Mentink/CUDuPont@DuPont, Bernard J Reilly/AE/DuPont@DuPont, John R Bowman/AE/DuPont@DuPont, Andrea V Malinowski/AE/DuPont@DuPont, O scar T Garza/AE/DuPont@DuPont, Maurice Astorga/AE/DuPont@DuPont, Catherine A Barton/AEVDuPont@DuPont Subject: Air Dispersion Modeling Data Rob / Debbie, I have updated the table I sent Friday to include the vents from the not yet submitted Research Semiworks application.

AR226-2289 Robbin B anerjee 09/04/02 02:34 PM To: Oscar T Garza/AE/DuPont@ DuPont, Ta-W ei Fu/SE/DuPont@ DuPont cc: Stephen J Gissy/AE/DuPont@ DuPont, Kart G Kronberg/AE/DuPont@ DuPont, Fred M Lentz/SE/DuPont@ DuPont, Chris E Shoop/AE/DuPont@ DuPont Subject: CB report N O T Q U ITE SURE W H A T T H IS NUM BER M EANS Y E T ....F E N C E L IN E O R PO PULATIO N R EC EPTO R .....JU S T FO R IN FO ..... ----------------------------- Forwarded by Robbin Banerjee/AE/DuPont on 09/04/2002 05:33 PM -- ---------------------------------- From: Dawn D Jackson on 09/04/2002 04:48 PM To: Martha L Rees/AE/DuPont@ DuPont, John R Bowm an/AE/DuPont@ DuPont, David M Rurak/AE/DuPont@ DuPont, Diane R Shomper/AE/DuPont@ DuPont, Paul J Bosseri/AE/DuPont@ DuPont, H David Ram sey/SE/DuPont@ DuPont, George A Ainsley/SE/DuPont@ DuPont, Dawn D Jackson/CUDuPont@ DuPont, George H Senkler Jr/AE/DuPont@ DuPont, Robbin BanerJee/AE/DuPont@ DuPont, Kelli H Kukura/AE/DuPont@ DuPont, M.