3M General Offices 3M Center St.

P-1 "McCrea, Deborah" <mccrea@taftlaw.com> 11/02/2009 11:42 AM bcc Subject 11/02/2009 Letter To EPA Docket Center i 3 ^i0:35 Taft / Deborah McCrea / Legal Assistant Taft Stettinius & Hollister LLP 425 Walnut Street, Suite 1800 Cincinnati, Ohio 45202-3957 Tel: 513.381.2838 Fax: 513.381.0205 www.taftlaw.com / mccrea@taftlaw.com Internal Revenue Service Circular 230 Disclosure: As provided for in Treasury regulations, advice (if any) relating to federal taxes that is contained in this communication (including attachments) is not intended or written to be used, and cannot be used, for the purpose of (1) avoiding penalties under the Internal Revenue Code or (2) promoting, marketing or recommending to another party any transaction or matter addressed herein.

SEVERN TRENT LABORATORIES ANALYTICAL REPORT JOB NUMBER: 244403 Prepared For: Weston Solutions, Inc. 1400 Weston Way Building 5-2 West Chester, PA 19380-1499 Project: Confidential Decatur - FC Investigation Attention: Jai Kesari Date: 02/28/2006 Signature Name: Richard C.

71 pp Ann K.

3M ENVIRONMENTAL LABORATORY REPORT NO.

INTERIM REPORT # 10 - Analysis of Fish and Clam Samples STUDY TITLE Analysis of Perflnorobutanesulfonata (PFBS), Perfluorohexanesulfonate (PFHS), and Perflnorooctanesulfonate (PFOS) in Water, Soil, Sediment, Fish, Clams, Vegetation, Small Mammal Liver and Small Mammal Serum Using LC/MS/MS for the 3M Decatur Monitoring Program DATA REQUIREMENTS EPA TSCA Good Laboratory Practice Standards 40 CFR 792 STUDY DIRECTOR Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way West Chester, PA 19380 Phone: 610-701-3761 INTERIM REPORT COMPLETION DATE May 09, 2006 PERFORMING LABORATORY Exygen Research 3058 Research Drive State College, PA 16801 Phone:814-272-1039 STUDY SPONSOR 3M Company 3M Building 0236-01-B-10 St.

3M Environmental Laboratory WX&OX7S Final Report- Analytical Study Single-Dose Dermal Absorption/Toxicity Study of T-6051 and T-6054 in Rabbits In-Vivo Study Reference Number: HWI#6329-133 Study Number: AMDT-013195.1 Test Substance: FC-129 (T-6051 and T-6054) Name and Address of Sponsor: 3M SCD Division 367 Grove Street St.

BACK BIODEGRADATION TEST SUBSTANCE Identity: Perfluorooctanesulfonylamido(ethyl)acetate; may also be referred to as PFOSAA, N-EtFOSAA, FC-128 (acid form) or FC-129 acid.

AA oIZ 6 FLUOROPOLYMERS DIVISION 10 0 3 April 13, 2001 Mr.

O ff 3M 3\1 General Offices 3M Center ^ ' ^ 55IJ4-,00 * * 2 - 2 .1038 ftR 86H Q . -.& J O I - 0 5 1 3 September 5, 2001 Document Processing Center (7407) Office o f Toxic Substances U.S.

^ R5 G_ M-I Telomer Research Program (TRP) Update Presented to U.S.

AAA6 - ll<W TWO-MILE RADIUS SURVEY AND C-8 SAMPLING REPORT DUPONT WASHINGTON WORKS FACILITY/LOCAL LANDFILL, WEST VIRGINIA (MARCH - MAY 2002) T 'O o cn ~Ui0*-77 Date: August 2002 Project No.: D6WW7423 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 CONTAJN NC 000365 Two-mile Radius Survey and C-8 Sampling Report Table of Contents TABLE OF CONTENTS 1.0 Introduction...................................................................................................................1 2.0 C-8 Analyses and Analytical Reporting...................................................................... 3 3.0 Washington Works Facility/Local Landfill Two-mile Radius Survey Summary of Results......................................................................................................5 4.0 Re-sampling of Selected Residences Located Within the One-Mile Radius..............6 5.0 Results for Additional Sampling Locations................................................................. 7 6.0 Path Forward................................................................................................................ 8 7.0 References.................................................................................................................... 9 Table 1 Table 2 Table 3 Table 4 TABLES Summary of Off-site Sampling Program (C-8 Sampling) Summary of C-8 Analytical Results in Groundwater and Surface Water (Off-site Wells, Springs, and Cisterns) Local Landfill Two-mile Radius Summary of C-8 Analytical Results in Drinking Water (Off-site Wells, Springs, and Cisterns)--One-mile Radius Re-sampling at Washington Works Facility/Local, Letart, and Dry Run Landfills Summary of Additional C-8 Analytical Results in Groundwater and Surface Water Figure 1 FIGURES Washington Works Facility and Local Landfill Two-mile Radius Map Appendix A Appendix B APPENDIX Two-mile Radius Well Survey Results--Washington Works Facility and Local Landfill DuPont Washington Works West Virginia Miscellaneous Groundwater Samples WV-2 report.doc Jul. 31, 02 Wilmington, DE 000366 i Two-mile Radius Survey and C-8 Sampling Report Introduction 1.0 INTRODUCTION A multi-media consent order (Order No.

a.a 6 -- TOXICITY TO TERRESTRIAL PLANTS TEST SUBSTANCE_______ Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: The test substance is a white powder.

AR226-1742 PFOS: A PILOT REPRODUCTION STUDY WITH THE MALLARD FINAL REPORT WILDLIFE INTERNATIONAL, LTD.

Enclosure 5 Analytical Report Fluorochemical Characterization of Water and Sediment Samples Decatur Bakers Creek #2 - July 2003 (E03-0561) Exygen Research Laboratory Report No.