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-4 ^ 226-/666 From: Dawn D Jackson on 08/21/2000 11:01 AM To: cc: Subject: Diane R Shomper/AE/DuPont@DuPont R Clifton Webb/AE/DuPont@DuPont, H David Ramsey/AE/DuPont@DuPont, G Irvin Lipp/AE/DuPont@DuPont, L Craig Skaggs/AE/DuPont@DuPont Re: 3M Announcement - Local Media Inquiries Cj Hi, Diane, Thanks for your response to my questions, but I am in need of clarification on the Corporate/FP standby statement about the 3M announcement.

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AR5.U-OH55 BIOSEARCH, INC. p.o. bo* 8598 Philadelphia, Pennsylvania 19101 telephone: (215) 848-4499 Submitted to: Material: Sample Received: Date of Report: Test: Object of Test: Procedure: ResuIts: Conclusion : 3M Company 3M Center St.

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#2 0 ,-/2 4 3 Toxicological Summary PFOS Dietary Acute Northern Bobwhite Study Test Substance: Perfluorooctanesulfonate (PFOS) Structure: 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, CAS# 2795-39-3 Remarks: The test substance is a white powder (3M lot #217).

Biennial Report for the Manufacture of APFO Calendar Years of 2002 and 2003 DuPont Company - Fayetteville Work Page 1 of 4 /87& Biennial Report for the Manufacture of APFO Calendar Years of 2002 and 2003 DuPont Company - Fayetteville Works Note: The information contained in this document is submitted voluntarily and may be subject tofuture revision and/or modification.

The miracles o f science 05FEB-9 AH!!

AR226-2233 Vapor Scavenging Coefficient Estimation Vapor scavenging coefficients are used to estimate the rate of removal of a soluble species that exists below the cloud line based on rain event characteristics, such as intensity and droplet size.

AR226-2251 Catherine A Barton ^ 01/30/2002 05:12 PWI To- Mark H Russell/AE/DuPont@DuPont cc: Robert F Pinchot/DEV/AE/DuPont@DuPont, Andrew S Hartten/AE/DuPont@DuPont, Theodore H Carski/AE/DuPont@DuPont Subject: Re: Draft modeling report D Mark, Thanks so much for your great work.