AR226-2463 'A V A y.W .S V -W ^\\\\V .W A '`.V.

AR226-2483 fii July 16, 2001 C E R T IF IE D M A IL RET U R N R E C E IP T R E Q U E ST E D M s.

AR226-2541 RESPONSE TO INFORMATION REQUESTED REGARDING APRIL 1992 VI REPORT (REFERENCE; EPA REGION III LETTER DATED MAT 5, 1997) DUPONT WASHINGTON WORKS WVD045875291 Responses to information requested in the referenced EPA letter are presented below.

AR226-2812 DuPont-12944 TRADE SECRET Study Title Perfluorooctanoic Acid: Relationship Between Repeated Inhalation Exposures and Plasma PFOA Concentration in the Rat Author: Paul M.

I FOR DU PONT USE ONLY AR226-2934 Du Pont HLR 624-87 Study T it le In h a la tio n Approximate Lethal Concentration of Author Rudolph V a le n tin e Study Completed On November 10, 1987 Performing Laboratory E .

H-24516: Subchromc I'oxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations AR226-3201 DuPont-5368 TRADE SECRET Study Title H-24516: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations Volume 5 o f 5 Laboratory Project ID: DuPont-5386 Test Guidelines: U.S.

3 GLP10-01-02 Interim Report 12: Analysis for PFOS, PFHS and PFBS in Decatur, AL Off-Site Soils Collected September/October 2010 Study Title 3M Environmental Laboratory Analytical Protocol GLP-10-01-02: Analysis of Perfluorooctane Sulfonate (PFOS), Perfluorohexane Sulfonate (PFHS) and Perfluorobutane Sulfonate (PFBS) in Groundwater, Soil and Sediment for the 3M Decatur Phase 3 Site-Related Monitoring Program Data Requirement EPA TSCA Good Laboratory Practice Standards 40 CFR Part 792 Study Director Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way West Chester, PA 19380 Phone: 610-701-3761 Principle Analytical Investigator Cleston C.

3 3M Environm ental Laboratory E05-0210 Interim R eport#13 Interim Report #13: Analysis of Tennessee River Water Samples Study Title A P (PFBS), Pn a l y s i s o f e r f l u o r o b u t a n e s u l f o n a t e erfluo ro hexanesulfonate (PFHS), a n d Pe r f l u o r o o c t a n e s u l f o n a t e (PFOS) in Wa t e r , So i l , Se d i m e n t , Fi s h , C , V , Sl a m s e g e t a t i o n m a l l Ma m m a l Liv e r a n d Sm a l l M Sa m m a l e r u m Us i n g LC/MS/MS 3M D M Pf o r t h e e c a t u r o n it o r in g r o g r a m Data Requirement EPA TSCA Good Laboratory Practice Standards 40 CFR 792 Author Michelle D.

SEVERN TRENT LABORATORIES ANALYTICAL REPORT JOB NUMBER: 244404 Prepared For: Weston Solutions, Inc. 1400 Weston Way Building 5-2 West Chester, PA 19380-1499 Project: Confidential Decatur - FC Investigation Attention: Jai Kesari Date: 02/28/2006 Signature Name: Richard C.

bm lr< X > & PFOS: *' A 96-HOUR SHELL DEPOSITION TEST WITH THE EASTERN OYSTER (Crassostrea virginica) FINAL REPORT WILDLIFE INTERNATIONAL LTD.

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BIOACCUMULATION (ANALYTICAL ONLY) AR23&0354 TEST SUBSTANCE_______________ Identity: N-ethylperfluorooctane sulfonamidoethanol; may also be referred to as N-EtFOSE Alcohol or FM-3422. (1-Octanesulfonamide,N-ethyl1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-N-(2-hydroxyethyl)-, CAS #1691-99-2) Remarks: Material is an off-white, waxy solid of uncharacterized purity.

06/22/00 T-7098.1 POSF PK PHARMACOKINETIC STUDY OF POSF IN RATS - STUDY OUTLINE Study Objective: The objective o f this study is to assess the potential for oral absorption, urinary and fecal clearance and biological persistence o f perfluorooctane sulfonyl fluoride (POSF) in male Sprague Dawley rats after a single oral dose.

BACK TO MAIN Larry R.

Quality Assurance Project Plan Multi-City Study Sampling Task (N100672) ' BACK TO MAIN Amendment 1 to Revision No.: 1 Effective Date: Junel6, 1999 Page 1 of3 Amendment 1 to the Quality Assurance Project Plan and Associated SOP's for Empirical Human Exposure Assessment Multi-City Study Sampling Task To June 16,1999 Prepared by Battelle 397 Washington Street Duxbury, MA 02332 (781) 934-0571 APPROVALS Donald Gunster \ Sampling Task Leader ^-- A)P Rosanna Buhl Battelle Sampling Task QA Officer Marcia Nishioka ' Battelle Project Manager JhMA Susan Abbgy| if u (j Battelle Program QA Officer tI ifln Date ' Date VV ?