AR226-3187 DuPont-4739 TRADE SECRET Study Title H-24616: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations Volume 4 o f 5 Laboratory Project ID: DuPont-4739 Test Guidelines: U.S.

AR226-3205 DuPont-2927 Supplement No. 1 TRADE SECRET Study Title H-24018: Biopersistence Screening 10-Dose Oral Gavage Study in Rats Supplement No. 1 Laboratory Project ED: DuPont-2927 :g:iW:a Sfir AUTHOR: Carol Finlay, B.A.

DuPont-2925 Supplement No. 1 -7Company Sanitized.

DuPont-2924 Supplement No. 1 Known Impurities: iJnknown Sponsor: E.

This report provides the details of comments which have been previously presented to the Agency by DuPont.

Dominiak: Re: March 6, 2001 Letter from Taft, Stettinius & Hollister LLP DuPont Confidential Business Information Claim Per our discussion, with respect to the above-identified letter from the Taft, Stettinius & Hollister law firm, which represents plaintiffs in a lawsuit against the DuPont Company, the following documents attached to that letter are claimed by DuPont as containing TSCA Confidential Business Information: 2, 9, 101, 122, and 130.

Dominiak: Re: March 6, 2001 Letter from Taft, Stettinius & Hollister LLP DuPont Confidential Business Information Claim Per our discussion, with respect to the above-identified letter from the Taft, Stettinius & Hollister law firm, which represents plaintiffs in a lawsuit against the DuPont Company, the following documents attached to that letter are claimed by DuPont as containing TSCA Confidential Business Information: 2, 9, 101, 122, and 130.

DuPont indicated that for many years most of their focus had been on occupational areas, but that this had changed when the issues with PFOS were recognized.

Included are an Executive Summary and two reports: DuPont EMSE Report No. 13-03 and DuPont EMSE Report No. 15-03.

Korziniowski - DuPont R EC EIV ED O P P T N CIC 2003 O CT-15 AM 8:10

Ann Bradley/STB/DUP @DUP, Robert F Pinchot/DEV/AE/DuPont@DuPont, Debbie J Mulrooney/AE/DuPont@ DuPonl, Bernard J Reiily/AE/DuPont@ DuPont co: Paula Durst-G illis (SpilmanThomas & BatUe)@DUP Subject: MET data communication with agencies In follow up to our d iscussions A p ril 2 4 ,20 0 2 w ith D AQ a nd M ay 2 ,2 0 0 2 w ith O hio EPA, I called C hris A rrington a t DAQ a nd B ill S pires a t OEPA th is m orning to indicate th a t to the b e st of o u r know ledge, we believe th a t the ra in fa ll rate data used in the a ir e m issions m odelling m ust have been from the P arkersburg a irp o rt sin ce w e do not have th e ca p a b ility to m easure ra in fa ll rate a t the plant.

Korziniowski - DuPont R EC EIV ED O P P T N CIC 2003 O CT-15 AM 8:10

DuPont Letter to WVDEP attaching resultsof C-8 sampling of West Virginiaand Ohio public water supplies (third quarter and fourth quarterof 2002) (November 20, 2002); 3 DuPont's "Ohio River Water Sampling Results: DuPont Washington Works Facility And The Letart Landfill" (November 2002); 4.

Included are an Executive Summary and two reports: DuPont EMSE Report No. 13-03 and DuPont EMSE Report No. 15-03.

This report provides the details of comments which have been previously presented to the Agency by DuPont.