TOXIKON FINAL REPORT: 01-7019-G1 CHO/HGPRT FORWARD MUTATION ASSAY - ISO (T-6889.7) Author Devaki Sadhu, Ph.D.

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AR226-1864 it RESEARCH *, Proven Results

AR226-2295 ^ Paul J Bossert 01/28/2003 05:05 PM To: cc: S u b je c t Gerald L Kennedy/AE/DuPont@ DuPont, Robert W Rickard/AE/DuPont@ DuPont Catherine A Barton/AE/DuPont@ DuPont, David M Rurak/AE/DuPont@ DuPont, John R Bowm an/AE/DuPont@ DuPont, M.

AR226-2562 Meeting Notes - September 25,2001 Washington Works Groundwater Model A meeting was held on September 25, 2001, at EPA headquarters in Philadelphia to discuss the groundwater model developed for the Washington Works Plant in Parkersburg, WV.

INTERIM REPORT #22 - Analysis of Soil Samples STUDY TITLE Analysis of Perfluorooctanoic Acid (PFOA) 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 September 22,2006 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.

P-1 "McCrea, Deborah" <mccrea@taftlaw.com> 09/01/2009 11:30 AM To NCIC OPPT@ EPA cc "Bilott, Robert A."

P-1 "McCrea, Deborah" < m ccrea@ taftlaw .com > 12/14/2009 03:38 PM To NCIC O PPT@ EPA cc "Bilott, Robert A." < bilott@taftlaw.com> bcc Subject 12/14/2009 Letter To EPA Docket Center f i / L Z I G ' 3> 9 x l 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.

3M ENVIRONMENTAL LABORATORY REPORT NO. 07-0650 Final Report Analysis of PFBA, PFOA, PFBS, PFOS, FBSA, and FOSA in Aqueous Samples from 3M Decatur, Alabama 3M Decatur NPDES Permit Number AL0000205: Quarterly FC Monitoring of Outfall DSN001; 4th Quarter 2007 Sampling Laboratory Request Number: E07-0650 Method Requirement: 3M Method ETS-8-154.1 Report Date -December 10, 2007 Testing Laboratory 3M EHS Operations 3M Environmental Laboratory Building 260-5N-17 Maplewood, MN 55144-1000 Requester Gary Hohenstein 3M Building 42-02-E-27 PO Box 3331 Saint Paul, MN 55133-3331 Phone: (651)778-5150 Fax: (651)778-7203 1ir accredited] Certificate #2052-01 The testing reported herein meet the requirements of ISO/IEC17025-2005 "General Requirements for the Competence of Testing and Calibration Laboratories", in accordance with the A2LA Certificate #2052-01.

From: B fW 4 J R*41y on 01/20/2002 09 22 AM To: ASNppQonvirorcorp com, rhamsigenvironccrp :cm cc: M Ann Sradly/STB/DUP@OUP *ohn R 8owman/AE/DuPont@QuPont Subjsct: 10 ug/L m Environ Hazard Narrativa ------------------------- Fcrvrarded oy Barnard j RetiiyiAE/CuPcni on 01/20/2002 09 23 A M ---------- From: Bernard J Reilly on 01/20/2002 09 2i AM To cc: Subject: Gerald L Kennedy/AE/DuPont@DoPont Robert W Rickard/AE/DuPont@OuPont David M Rurak/AE/DuPontjgDuPont, M Ann 8raaley/S"rB/0UP@0UP, John R Bowman/AE/DuPontOuPont.

April 15, 2012 Probable Link Evaluation of Cancer Conclusion: On the basis of epidemiologic and other data available to the C8 Science Panel, we conclude that there is a probable link between exposure to C8 (also known as PFOA) and testicular cancer and kidney cancer but not any of the other cancers that were considered.

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