3M Corporate Toxicology and Regulatory Services 3M Center, Building 0220-06-E-03 St.

M 2 S 6 _ 373C Andrea V.

\6YY p.1 m i 2 6 - 3733 July 28, 2006 u c ; QO 05 HUG - 1 " " D ' DuPont Haskell Laboratory for Health and Environmental Sciences Elkton Road, P.O.

3M Generai Offices 3M Center S t Paul, MM 55 144-1000 651 7 3 3 1 1 1 0 P-1 i\ QOlefP. ' 3M September 17,2008 RF'Ct-IVTD J ` I u IL 08 SEP I 9 AH I0-* f 0 Document Control Office EPA East Room 6428 AR- 226 Docket US Environmental Protection Agency 1201 Constitution Avenue, NW W ashington DC 20460 iOOC -.I $ : li 9 VIA Federal Express AZ2Cr38a% Attention: Docket No.

P-1 Taft/ Taft Stettinius & Hollister LLP 425 W alnut Street.

P-1 "McCrea, Deborah" <mccrea@taftlaw.com> 06/12/2009 03:54 PM To NCIC OPPT@EPA cc "Bilott, Robert A."

3M Environmental Laboratory P0003268; Interim Report#2 Analytical Report Analysis of PFBS, PFHS, and PFOS from 3M Decatur Offsite Sediment Samples Interim Report #2 MPI GLP Protocol Number P0003268 Data Requirement 40 CFR Part 792 Author Michelle D.

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y lK S _ 0 2 6 MICROBIOS MICROTOX TO XIC ITY TEST TEST SUBSTANCE______________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-603F. (1Octanesulfonic acid) (CAS # 2795-39-3).

Internal Correspondence de: V.

Internal Correspondence de: M.

3M ENVIRONMENTAL LABORATORY REPORT NO.

3M ENVIRONMENTAL LABORATORY REPORT NO.

STLS E V E R N TRENT STL Chicago 2417 Bond Street University Park, IL 60466 Tel: 708 534 5200 Fax: 708 534 5211 mvw.sf/-/ni:.com S ig n a tu re Name : Rij^yCrrl C , Wright Title: Pt o jecL Manager E-Mail : rwright@st.l- inc .com Thi.s Report Contains Leaders in F.nvironmenta!

fm -o o ^ i BIODEGRADATION F 7 ^J5 - TEST SUBSTANCE Identity: Perfluorooctanesulfonate, DEA salt; may also be referred to as PFOS DEA salt, FC-99, or 3M Sample No. 2. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, compd. with 2,2'-iminobis[ethanol] (1:1), CAS # 70225-14-8) Remarks: Test sample is a mixture of the test substance in water (approximately 25% test substance and 75% water).