There is only one TRP member company (DuPont) that manufactures both the basic telomer chemicals and end-use products in the United States.

n TSCA CBI H-23005: In Vitro Mammalian Cell Gene Mutation Test (CHO/HGPR.T) with an Independent Repeat Assay DuPont HLO-1998-01211 TABLE OF CONTENTS Page Good Laboratory Practice Compliance Statement 2 ..........................

Mail Code 7405M Washington, DC 20004-001 06/10/02 18:25 093810205 TS&H CINCINNATI 004/019 June 10, 2002 Page 3 Re: C-S Assessment O f Toxicity Team Work Under November 14,2001 Consent Order Between DuPont And State Of West Virginia (Order No, GRW-2001-0191 Ladies and Gentlemen: As indicated in our prior correspondence to the State and Federal agencies, our law firm and co-counsel in Charleston, West Virginia, have been certified by a State Court in West Virginia to serve as counsel for a class of all persons whose drinking water is or has been contaminated with ammonium perfiuorooctanoate ("C-S") attributable to releases from E.I. duPont de Nemours and Company's ("DuPont's") Washington Works in Wood County, West Virginia.

Chambers Works C8 Sampling 2/06 DuPont Sample Identification APFO (ng/L) PFOA (ng/L) C W K-G -3003310 C W K-G -3000563 C W K-G -3001815 C W K-G -3000098 CWK-K-FBLK-1 CWK-K-TBLK-1 \ \ \ \ \ \ .

Environmental Control Consultant DuPont Washington Works P.0.

I Skin Irrilation Test with H-21987 in Rabbits DuPont HLR 605-96 B.

Box 50 Newark, Delaware 19714-0050 ones (0) LABORATORYPROJECT ID: DuPont-13216 `Company Sanitized.

To Improve the accuracy of the analysis for the presence of ammoniumi pertluoreoctanoate (C-8) in water, DuPont has been assessing alternative anaiybcai procedure DuPont has also been investigating new samping procedures to assure more , J hrou?

Vapor Pressure Determination: DuPont report 12735 Test Guideline^) Authors Mary A.

Dom not contain TSCA CBI Page5 DUPONT SM.DOC 000071 P F O A Sample Collection Record Study: PFOA Screening S ite No.: 1 1!

Voluuary UEP.AmmoaiunPefaaroosasces OL DUPONT AND CUSTOMER ACTIVITIES NarradiveDescription of APFOUse "The blockdiagramon theback page Ged"DuPont US APFO Balance"describesthe procasses discussedbelow.

DuPont did not divulge that it had found the Teflon-related pollution in Little Hocking tap water as early as 1984.

.: Sponsor: DuPont Specialty Chemicals E.

H-23005: In Vitro Mammalian Cell Gene Mutation Test (CHO/HGPRT) with an Independent Repeat Assay DuPont HLO-1998-01211 TABLE OF CONTENTS .

DuPont Specialty Chemicals E.