AR226-2476 &-14.00 Jim: Per your request for assistance in wording a letter to your customers, here is a draft that may be helpful. 1(1 can be of further assistance, you can reach me at 863-2513.

AR226-2518 OHIO RIVER WATER SAMPLING RESULTS DUPONT WASHINGTON WORKS FACILITY AND THE LETART LANDFILL Date; November 2002 Project No,: D6WW7423 18983635J4000 18983632.00021 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Bartey Mill Plaza, Building 27 Wllmlngton, Delaware 1980S ASB019657 EID630089 I 1 1 1 1 1 1 1 ...I Il^iTi^1' 1 1 1 1 1 1 1 <

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.

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3M ENVIRONMENTAL LABORATORY ARLLG-c06Y BactCopy ofO Tw = 28 ooo = METHOD EH-2 A SPECTROMETRY (HPLC/MS/MS) DETERMINATION OF PERFLUOROOCTANE SULFONATE (PFOS), PERFLUOROOCTANE SULFONYLAMIDE (PFOSA), AND PERFLUOROOCTANOATE (POAA) IN WATER BY LIQUIDSOLID EXTRACTION AND HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY/TANDEM MASS Method Number: ETS-8-154.0 Adoption Date: 04/2/2000 Author: Kristen J.

} `BIODEGRADATION STUDY REPORT i. . -- ETT Wednesday, Novemb0e6r, 2002 } Blodogradatin Srsan Styfr TelomerType Alcohols aco ConamaPptRrOojJeEcrCiT0N:uwEE0Bo1E.nR0s088 cacns - CoSstToUnDYDILRaEeC,TOPR A cuss } EJaGnmens naLunnL, eP1o0.n,y a } Soturi ataveeSSmot,o a as 4a J etEe tor: gat, 2000on sun .

3hMaSpectay Meat ert 3M January 29, 2003 SWU Forl MN 144.000 ARRAG _ 12079 FYZ- 0203_ 01378 HMR | FYI-80-001373 VVIIAAFFEEDDEERRAALLEEXXPPRREESSSS Document Control Office (DCO) Officeof Pollution Prevention and Toxics (OPPT) US EnvironmentalProtection Agency EPA East, Room 6428 1201 Constitution Washington, DC Avenue, 20460 NW Attention: Docket No.

AR &26 -- 1356 A Pharmacokinetic Study of Potassium Perfluorooctanesulfonate in the Cynomolgus Monkey `Southern Research Institute Study ID: 9921.6 April 22, 2003 : 000378 Final Report on A Pharmacokinetic Study of Potassium Perfluorooctanesulfonate in the Cynomolgus Monkey To: 3M Corporation P.O.3BMoxCe3n3te3r2,72245-5I1N3-30-43327 St.

ARBRE -- 1416 SAMPLING INVESTIGATION RESULTS LITTLE HOCKING WATER ASSOCIATION WELL FIELD WASHINGTON COUNTY, OHIO Date: April 2003 Project No: 714889283762.00010 am `CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 `Wilmington, Delaware 19805 000302, `Samping nvestgatn Resuts ____ Tableof Contents TABLE OF CONTENTS BROUIVE SULIILY consmssmsmsssssmmsmmsmmmns ori 1 TH mmm) EE TO -------- 21 ClO mmm ----) 22 BSrogtoloYommmmmmmmmmmmmmmme------------d 3.0 Sampling APPIOGCh rr wsssmmm----"-- 40 Groundwater Sample Results..............

EnvironmentalNews AR226-1529 Potential explanation for fluorinated compounds' persistence The first assessment of the atmospheric lifetime of an important class of fluorinated chemicals, fluorotelomer alcohols (FTOHs), in- ducers.

Precise Research.