Applicant / Sponsor DuPont Representative Date 2 Company Sanitized.

0m DuPont Engineering I February 5, 2003 AR226-1415 DuPont Engineering Barley Mill Plaza - Bldg. 27 Lancaster Pike & Rte. 141 Wilmington, DE 19805 David P.

DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P.0.

DuPont Internal Final Report, "A Case-Control Study Of Leukemia At The Washington Works Site" (12/31/91) (EID151953-65).

Andrea V Maiinowaki/AE/DuPont@OuPont.

We understand that the first set of slides (Exhibit 1) was used by DuPont in conjunction with a public media presentation to explain the preliminary results and that the second set of slides (Exhibit 2) was used by DuPont in conjunction with a meeting with USEPA the same week to explain the preliminary results.

.^1 AR226-2624 INS AR226-2624 JULY 2004 PFOA SAMPLING DUPONT CIRCLEVILLE WORKS CIRCLEVILLE, OHIO Date: August 2004 Project No.: 18984003.04005 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 July 2004 PFOA Sampling Introduction On July 8,2004, groundwater was sampled from two recovery wells and three production wells at the DuPont Circleville Plant.

-Ti -\ i r 07 IQ: UZ DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P.O.

July 31.2002, leter from DuPont to WVDEP; 29.

DuPont Hid Teflon Poll.

Andrea V Maiinowaki/AE/DuPont@OuPont.

DuPont-13309, 3M Reference No.

Ivarsson, I am contacting you on behalf of DuPont, a premier multi-industrial company.

Auer Oscar Hernandez Jennifer Seed Mary Ellen Weber Mary Dominiak September 15, 2004 Page 2 at the DuPont Washington Works Plant.

Prior to the start of the program, DuPont & Envirogen reviewed and agreed on the test protocol and the analytical methods.