The purpose o f this report is to document the revised groundwater flow model for the DuPont Washington Works facility.

MR-10890-l,DuPont-1202 2001.

This report is submitted pursuant to commitments made by DuPont in a March 14, 2003, Letter of Intent (LOI) to Stephen L.

DuPont AEMR 205-95 -7- EID941486 FIG. 1: CLOSED BOTTLE TEST - C _ H RJZ023484 EID941487 DAYS

MR-10890-1, DuPont-1202 2001.

We look forward to working wrth you and other representatives from DuPont In this matter.

To: Katsunosuke Kitagawa/PO/DuPont@DuPont cc: HidetakaHironiatsu/PC>/DuPont@DuPont subject Re: C-B in theAirQ Kitagawa-san, It is rather complicated to explain on paper concerning the CEG issue. .We had a C-8 review with Tanaka-san and Hiromatsu-san when they were at WW last Friday.

Air Data -- DuPont Washington Works Site (4 pages) 2.

I ttust that the details eoneerning this sampling effort will be determined between you and Andrew Haitten from DuPont.

AR226-2557 - , , -<9 Andrew S Hartten 05/23/2001 05:21 PM To: Robert L Ritchey/CUOuPont@OuPontA, Hson A Crane/AE/DuPont@DuPont, George Woytowich/CL/DuPont@OuPont cc: Subject: Information on Washington Works Facility I received this today.

DuPont Haskell Laboratory P.O.

The EPA order sets forth procedures which DuPont must follow to provide iramediate and long term safe drinking water to usersofpublic or private water supplies in West Virginia and Ohiowhere C8 concentrations exceed screening levels. we To View All Press Releases:http://www.epa.gov/region3/r3press/s3press.htm 2 .

r -- ------------------------------------- ---- ------- -- -- -------------------------------404 TRADE SECRET Study Title H-24768: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations Volume 4 of 5 Laboratory Project ID: DuPont-5990 DuPont-5990 Test Guidelines: U.S.

M W 502 MAC - 33*0 H-24768: One-Generation Reproduction Study in Rats______________________________________ DuPont-13784 TRADE SECRET Study Title H-24768: One-Generation Reproduction Study in Rats Volume 1 of 2 Laboratory Project ID: DuPont-13784 Authors: Eve Mylchreest, PhD.

In addition, Duponts agreements with U.S.EPA do not specify which releases are targeted for reductions. 2.