Callaghan Secretary Andrew Hartten Dupont Corporate Remediation Group Barley Mill Plaza Building 27 Wilmington, ____________________ Delaware 19805 Re: Washington Works and Dupont Landfills O rder# G W R-2001-019 Wood and Mason Counties Dear Mr.

Skin Irritation Test with H-21665 in Rabbits DuPont HLR 179

Does not contain TSCA CBS H-22994: Eye Irritation Test in Rabbits DuPont HL-1997-01226 Study Director: CERTIFICATION Issed b y Q..

Filliben T oxicology A ssociate DuPont HL-1997-01205 Date -2 - Company Sanitized.

I. du Pont de Nemours and Company, Newark, Delaware or in the DuPont Records Management Center, Wilmington, Delaware

DuPont-5206 Company Sanitized.

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 of 5 Laboratory Project ID: DuPont-4739 TEST GUIDELINES: U.S.

Does not contain TSCA CBI ) H-24678: Subchronic Toxicity 90-Day Oral Gavage Study in Rats ) ) DuPont-6554 Individual Body Weights Body Weight Body Weight Body Weight Body weight Body Wei

McCabe and can hereby reaffirm that neither DuPont nor Mr.

TRADE SECRET Study Title H-24943: Biopersistence Screening 10-Dose Oral Gavage Study in Rats Laboratory Project ID: DuPont-6544 AR226-3195 DuPont-6544 Author: Carol Finlay, B.A.

Summary of Off-Site Sampling Program (C-8 Sampling)- Ohio One-Mile Radius Residential Sampling Sunanaty of C-8 Analytical Results in Groundwater and Surface Water Ohio One-Mile Radius Residential Sampling Summary of Off-Site SamplingProgram (C-8 Sampling) - Ohio Two-Mile Radius Residential Sampling Summary of C-S Analytical Results Zones A, B, and C - Ohio Two-Mile Radius Residential Sampling Monitoring Well Construction and Groundwater Elevation Data - DuPont Washington Works Facility Summary of Analytical Results: C-8 in Groundwater - DuPont Washington Works Facility Summary of Analytical Results: C-8 m Surface Water - DuPont Washington Works Facility Ohio River Water Sampl

Korzeniowski - DuPont M.

Catherine A Barton y Catherine A Barton 03/03/2003 12:53 PM To: cc: Subject: Charles J Zarzecl<i/AE/DuPont@DuPont C8 meeting Chariie, I reviewed the draft presentation (attached in last email) with the business crowd, at a hideous 7:30 this morning.

Catherine A Barton y Catherine A Barton 03/19/2003 04:25 PM To: cc: Subject: Charles J Zarzecki/AE/DuPont@DuPont lookee what I found Charlie, Dam it,- There are a few papers on the web that discuss uncertaintly around Gaussian models.

Catherine A Barton Catherine A Barton 03/03/2003 12:53 PM To: Charles J Zarzecki/AE/DuPont@DuPont cc: Subject: C8 meeting Charlie, I reviewed the draft presentation (attached in last em ail) with the business crowd, at a hideous 7:30 this morning.