DUPONT AND CUSTOMER ACTIVITIES Narrative Description ofAPFO Use The block diagram on the back page titled "DuPont US APFO Balance" describes the processes discussed below.

Have a nice weekend, DuPont a aeGmbH & Co.

DuPont-13267 -*2^ 6- /6S3> Study Title Ammonium Perfluorooctanoate: Age Effect on the Plasma Concentration in Post-Weaning Rats Following Oral Gavage A u t h o r : Xing Han, Ph.D.

DuPont-13267 - ^ < 2*2 /6S2> Study Title Ammonium Perfluorooctanoate: Age Effect on the Plasma Concentration in Post-Weaning Rats Following Oral Gavage A u t h o r : Xing Han, Ph.D.

DuPont agreed to change the proposal as recommended by Ohio EPA (DuPont letter to Ohio EPA, dated April 1,2002).

Does not contain TSCA CBt H-24516: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproductive Evaluations DuPont-5386 APPENDIX MM INDIVIDUAL ANIMAL FINAL BODY AND ORGAN WEIGHTS Pi ADULTS AND F, ADULTS Company Sanitized.

DuPont Legal Andrea V.

This study was conducted at DuPont's Haskell laboratory during 1991 and 1992.

Another interesting fact Debbie shared with Dave was that DuPont has run a deposition model using software different than the standard ISC model.

TRADE SECRET AR226-3170 DuPont-448 Study Title H-24616: Influence on Growth and Growth Rate of the Green Alga Selenastrum capricornutum Laboratory Project ID: DuPont-4488 AUTHOR: Terry Lee Sloman, B.S.

TRADE SECRET AR226-3170 DuPont-4488 Study Title H-24616: Influence on Growth and Growth Rate o f the Green Alga Selenastrum capricornutum Laboratory Project ID: DuPont-4488 Author: Terry Lee Sloman, B.S.

TWA * AEL is DuPont's Acceptable Exposure Limit.

Box 029 Trenton, NJ 08625-0029 Re: DuPont Chambers Works NJPDES Permit No.

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.

Ann Bradtey/STB/DUP@DUP, Bernard J Re%/A&DuPont@DuPont, DWATKINS@MAIL.DEP.STATE.WV.US, QDASHER@MAIL.DEP.STATE.WV.US, DCR1SS@MA1L.DEP.STATE.WV.US, CONNOR.GARTH@EPA.GOV, REINHART.ROGER@EPA.GOV, D5TAATS@MAIL.DEP.STATE.WV.US, Robert L Ritchey/CL/DuPont@DuPont, WTOOMEY@WVDHHR.ORG, Laura R Walter/AE/DuPont@DuPont, abenincasa@mall.dep.state.wv,us, STEVE.WILLiAMS@EPA.STATE.OH.US.