Enclosed please find the additional information you requested on : 1) The comprehensive, peer reviewed study commissioned by DuPont and conducted by Environ on the global fate and exposure potential from DuPont Fluorotelomer products an d 2) Information on the studies that DuPont has conducted and commissioned on the biodegradation of fluorotelomer intermediates and products.

Box 50,1090 Elkton Road Newark, DE 19714-0050 Performing Laboratory Study Number AA44ER.341.BTL DuPont Project Number DuPont-6406 Page 1 o f 40 H-24889: In Vitro Chromosome Abenation Study in Human Peripheral Blood Lymphocytes DuPont-6406 STATEM ENT O F COM PLIANCE Study No.

AR226-2548 RCRA FACILITY INVESTIGATION REPORT DUPONT WASHINGTON WORKS WASHINGTON, WEST VIRGINIA JUNE 30,1999 Project No.

Between March 20and June 6, 2002, DuPont, through Potesta Associates, Inc.

Task been completed A: Groundwater (DuPont, 2002a; Use and 2002b).

DuPont-2921 -7- Company Sanitized.

A R 2 2 6 -1 892 81 PP EPA -DuPont Telomers Degradation Technical Meeting 9 AM - 4 PM 15 December 2004 Washington, D.

DC 20004-001 000124 r . une 10. 2002 'age 3 Re: C-8 Assessment O f Toxicity Team Work Under November 14. 2001 Consent Order Between DuPont .And State O f West Virginia (Order No.

DuPont Wilmington, DE Report Number: DuPont-19567 May 23, 2006 DuPont-19567 Author Signature Page ohn T.

Toric Study in Rats AR 226 -- 23/4 Dupont 10157 `TRADE SECRET [CJ I Study Title -- Laboratory Project ID: DuPont-10157 TEST GUIDELINES: United States (U.

2in TSCA CBS H-24944: Biopersistence Screening 10-Dose Oral Gavage Study in Rats DuPont-6542 LIST OF TABLES Page 1.

. \ Capka V.2, Sulecki L.1, Berti W.R.1, Gannon J.T.1, and Buck R.C.3 1 DuPont Central Research and Development, Wilmington, DE, USA; 2 DuPont Haskell Laboratory, USA; 3 DuPont Chemical Solutions Enterprise, U SA 8-2 Telomer B Alcohol: C8F17CH2CH2OH (8-2 TBA; CAS# 678-39-7) Background Information A key raw material used in the manufacture o f sales products.

AR226 - 3257 439 TRADE SECRET AR2RG 3257 Dupont 11408 Study Title H-25434: Static, Acute, 96-Hour Screening Test to Pimephales promelas Laboratory Project ID: DuPont-11408 AurHoR: Laurie D.

Catherine A Barton ^ Catherine A Barton ' 04/02/2003 04:57 PM To: Charles J Zarzecki/AE/DuPont@ DuPont cc: Subject: Re: Beychok Article Cl C h a rlie , Firs}, thanks fo r taking the tim e to go over Beychok's article thoroughly.

I. du Pont de Nemours and Company ("DuPont") owns and operates the DuPont Washington Works Plant in Parkersburg, West Virginia, across the Ohio River from the Little Hocking well field.