P-1 "McCrea, Deborah" <mccrea@taftlaw.com> 03/15/2010 02:08 PM To NCIC OPPT@EPA cc "Bilott, Robert A." < bilott@taftlaw.com> bcc Subject 03/15/2010 Letter To EPA Docket Center 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.

AfLRa.6 _ 0&3i BIODEGRADATION (BOD/COD) TEST SUBSTAN CE____________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95 or as a component of FC-201AF. (1Octanesulfonic acid) (CAS # 2795-39-3).

A R U 6 _ 0854 MICROBICS MICROTOX TOXICITY TEST T E S T SUBSTANCE__________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-603EF. (1Octanesulfonic acid) (CAS # 2795-39-3).

GLP10-01-02; Interim Report 16 Analysis of PFBS, PFHS, and PFOS in Groundwater Samples Avenue A Investigation Area; Decatur, AL - Jan 2011 GLP10-01-02: Interim Report 16 - Analysis o f PFBS.

3 GLP10-01-02 Interim Report 05: Analysis for PFOS, PFHS and PFBS in Avenue A Soils and Sediments Collected June/Julv 2010 Study Title 3M Environmental Laboratory Analytical Protocol GLP-10-01-02: Analysis of Perfluorooctane Sulfonate (PFOS), Perfluorohexane Sulfonate (PFHS) and Perfluorobutane Sulfonate (PFBS) in Groundwater, Soil and Sediment for the 3M Decatur Phase 3 Site-Related Monitoring Program Data Requirement EPA TSCA Good Laboratory Practice Standards 40 CFR Part 792 Study Director Jaisimha Kesari P.E., DEE Weston Solutions, Inc. 1400 Weston Way West Chester, PA 19380 Phone: 610-701-3761 Principle Analytical Investigator Cleston C.

3 Analytical Report Determination of PFC Concentrations in Fish Collected from the Tennessee River in the Fall of 2012 Study Title Analytical Study ISO12-01-01-04: Tennessee River Fish Sample Analysis, October 2012 Project Coordinator(s) Jai Kesari, P.E., DEE and Charles Young Weston Solutions, Inc. 1400 Weston Way Westchester, MA 19380 Principal Analytical Investigator Cleston C.

STLS E V E R N STL Chicago 2417 Bond Si reel University Park, IL 646B Tel: 708 534 5200 Tax: 703 534 5211 www.stl-inc.com SEVERN; TRENT ANALYTICAL REPORT JOE NUMBER: 332472 Prepared For :.. . .

310 Bonk Sfmei Decatur, Alabama 35601 256.353.291D tsla 256.353.3944 lax w w w .TTU NC.com geotechnical mm a n a l y t i c a l * m a t e r i a l s * e n v i r o n m e n t a l ........................................ ....... -- Decatur.

R K i-O II ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity: Perfluorooctanesulfonate, Ammonium salt; may also be referred to as PFOS NH4+ salt or FC-93. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, ammonium salt, CAS #29081-56-9) Remarks: Test sample was taken from 3M production lot #1.

M D fil Acute Ocular Irritation Test with T-3421 in Albino Rabbits 'i-- \ Experiment No.: 0883EB028 6 Conducted At: Safety Evaluation Laboratory Riker Laboratories, Inc.

Pathology Associates International A Company of Science Applications International Corporation A nB npk9tC m m dO otiitm nr Sponsor: 3M St.

NOTOX Safety & Environmental Research BV.

C orning H azleton liw.

final report R O G E R G.

3M Environmental Technology and Services PO Box 33331 St.