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.

Handling of lithium-ion batteries, etc. for automotive use and facilitation of procedures for export repatriation, etc.

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.

AR226-2489 OiiPtffl Waslincrer!

DuPotit Fluoroproducts AR226-2612 DuPoat Pluofoproducts ''' Chestnut RUB Plaza P.O.

AR226-3174 TRADE SECRET FINAL REPORT Study Title H-24616; In Vitro Mammalian Chromosome Aberration Test in Chinese Hamster Ovary (CHO) Cells Authors Ramadevi Gudi, Ph.D.

3M EnvironmentaLl boratory FinalReport-AnalyticaSltudy Single-DosDeermal Absorption/ToxiciStyudyofT-6051and T-6054 in Rabbits In-VivoStudyReferenceNumber: HWI#6329-133 StudyNumber: AMDT-013195.1 TestSubstance:FC-129 (T-6051andT-6054) Name and AddressofSponsor: 3M SCD Division 367 Grove Street St.Paul,MN 55106 Name and Address of Testing Facility: 3M Environmental Technology & Services 935 Bush Avenue St.Paul,MN 55106 Method Numbers AMDT-M-1-0, AMDT-M-2-0, AMDT-M-4-0, AMDT-M-5-0, AMDT-M-8-0, and Revisions: Thermal Extractionof Fluorideby Means of a Modified Dohrmann DX2000 Organic Halide Analyzer-Liver FluorideMeasurement by Means of an Orion EA940 Expandable Ion Analyzer Extractionof Fluorochemicalsfrom RabbitLiver Analysisof RabbitLiverExtractforFluorochemicalsUsing ElectrospmyMass Spectrometry Analysisof FluorideUsing the SkalarSegmented Flow Analyzer with Ion SelectiveElectrode InitiatioDnate: See attachedprotocol Author:James D.

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ag226-375"pY, FETAL EXPOSURE TO PERFLUORINATED COMPOUNDS: DISTRIBUTION AND DETERMINANTS OF EXPOSURE AND RELATIONSHIPS WITH WEIGHT AND SIZE AT BIRTH. by Benjamin Joseph Apelberg, M.H.S.

3M 3M Corporate Toxicology and 3M Center, Building 0220-06-E-03 Regulatory Ser0ces St .

Final Report Mortality of Employees of an Ammonium Perfluorooctanoate Production Facility JessicaI.

3tLtq q ~ Taft/ Taft Stettinius & Hollister LLP 425 Walnut Street, Suite 1800/ Cincinnati, 01145202-3957 / Tel: 513.381 .2838 / Fax: 513.38t:0205 /www.taftlaw .com Cincinnati / Clevelano / Columbus / Dayton / Indianapolis / Northern Kentucky/ Phoenix/ Beijing ROBERT A.