AR226-3197 H-24516: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations________ ______________DuPont-5386 TRADE SECRET Study Title H-24516: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations Volume 1 of 5 Laboratory Project ID: DuPont-5386 T e s t G u id e l in e s : U.S.

H-24678: Subchronic Toxicity 90-Day Oral Gavage Study in Rats AR226-3243 DuPont-6554 TRADE SECRET Study Title H-24678: Subchronic Toxicity 90-Day Oral Gavage Study in Rats Volume 1 of 4 Laboratory Project ID: DuPont-6554 Test Guidelines: U.S.

AR&6- 2lf-6sr H 000654 AP.

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."

Nam e R o b e rt E.

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.

ARSLA6 - 0 7 6 / ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE____________________________________________ Identity: Mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-203CF-X or FC-203CF. (1-Octanesulfonic acid) (CAS # 2795-39-3).

M A S 6 - 0 2 /5 ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE________________________________________________ Identity: A mixture containing periluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-206CE. (1Octanesulfonic acid) (CAS # 2795-39-3).

AR SLSLG-Ogtf ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE__________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-600. (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 3M production lot number was not noted.

W A 26- l/J-IO C-8 LEVELS IN DRINKING WATER DISTANCE FROM NO. 5 OUTFALL (KXX.CS ) PPB 1984 1987 1988 PARKERSBURG 7.50 UPSTREAM ND ND WASH WORKS 0.50 UPSTREAM ND ND ND LBECK WATER DISTRICT 0.25 DOWNSTREAM 0.25 DOWNSTREAM 1.1 1.9 1.8 1.5 1.9 1.4 LITTLE HOCKING 3.00 DOWNSTREAM 0.6 ND ND RVENSVOOD 29.0 DOWNSTREAM ND ND = NOT DETECTABLE 10 6 3 5-3 - 03/08/89 - WS C:kit A TTACHMENT 2 000006

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.

^2Z&~ l72(p Determination of Possible Interference of Perfluorooctane Sulfonic Acid Potassium Salt with Rat Cholesterol Date: 8/17/99 Study: 6329 263 Serum Vehicle Blank Blank 0 ug/mL 0 ug/mL 1.08 mg 3.23 mg 6.46 mg /mL_______/mL_____ /mL mg/dL #1 mg/dL #2 mg/dL #3 68 66 66 65 67 66 66 65 65 65 65 65 66 66 65 mean s.d. 66.33333 65.66667 65.66667 65.33333 65.66667 1.527525 0.57735 0.57735 0.57735 1.154701 Method Principle (Trinder reaction) Cholesterol esters present in serum or plasma are hydrolyzed qualitatively in to free cholesterol and fatty acids by microbial cholesterol esterase.