A287 567 UJuSly.E13P, A2005 Page2 As you know, E. 1. du Pont de Nemours and Company ("DuPont") owns and operates the DuPon: Washington Works Plant in Parkersburg, West Virginia, across the Ohio River from the Little Hocking well field.

The updated serum sampling results for workers at the above referenced DuPont site are for 2008 .

AR226-3145 DuPont-4002 HASKELL LABORATORY FOR TOXICOLOGY AND INDUSTRIAL MEDICINE H-24390: STATIC, ACUTE 48-HOUR SCREENING TEST TO Daphnia magna PURPOSE; This is a rangefinding study designed to provide an estimate of aquatic toxicity using fixed test concentrations and data measurements at predetermined intervals.

AR226-3062 DuPont HLR 902-96 naaver.T.

Arrrg~ iH-sy Jah, 2 99 02: 02p DuPont-Chasbers Werks 609-540-4654 p .2 CC: B.

Ann Bradley/STB/DUPQDUP (bcc: Andrew S Hartten/AE/DuPont) Re: Little Hocking Soil Samples D Steve, I have talked with our chemists several times this week and now feel!

not contain TSCA CBS Sanitized- Does C om paoV DuPont H L-1997-00260 HASKELL LABORATORY FOR TOXICOLOGY a n d in d u s t r ia l m e d ic in e STATIC, ACUTE 96-HOUR SCREENING TEST F H -22274 j n p * r m ?

AR226-3035 DuPont HUI 822-95 HASKELL LABORATORY POR TOXICOLOGY AUD INDUSTRIAL MEDICINE STATIC, ACUTE 48-HOOK SCREENING TEST OF H-21460 Daphnie w a a , CONTINUED Based on visual observations, all solutions were clear, except for 50 mg/L which was slightly cloudy, 500 mg/L which was cloudy, and 5000 mg/L which was cloudy and white in color.

AR226-3146 DuPont-4003 HASKELL LABORATORY FOR TOXICOLOGY AND INDUSTRIAL MEDICINE H-24390: STATIC, ACUTE 96-HOUR SCREENING TEST TO FATHEAD MINNOWS, Pimephales promelas PURPOSE; This is a rangefmding study designed to provide an estimate of aquatic toxicity using fixed test concentrations and data measurements at predetermined intervals.

Oletacedago SAIL. cromen ts JR (302) 366-5260 (II) "DuPont Statistical Analysis of Serum Lipid Data of Miteni Workers" 2

Best regards and thank you very much, A Phone Mobil upontholding.com DuPont Deutschland Holding GmbH & Co.

In the process of starting operation of the new dryer, source ID T6IV, DuPont engineers have discovered that the existing scrubber and exhaust system cause excessive back pressure when the two existing dryers, T6IE and T6IF, are also operating.

<^''<VS^ j( 06/27/2001 0334 PM To: crc Sublecl: Dabble J Mulrooney/AE/DuPontQDuPont, Robert F PinchoVDEWAE/DuPont@DuPont Catherine A Barton/AE/DuPontQDuPont Recap of our meeting Just so we're on the same page (and so I can remember what we said we'd do a week from now), I've summarized some notes from our meeting today.

In the process o f starting operation of the new dryer, source ID T61V, DuPont engineers have discovered that the existing scrubber and exhaust system cause excessive back pressure when the two existing dryers, T6IE and T6IF, are also operating.

DuPont began using PFOA in the manufacture of Teflon at their Washington Works plant in the carly 19505.