3M General Offices 3M Center St.Paul,MN 55144-1000 612733 1110 May 18,2000 VIA EXPRESS MAIL Dr.

~ 3N1 Corporate ToxicologN and 3M Center.

NEW SOLUTIONS, Vol. 18(2) 129-143.2008 ~p, -,~ -7 ~ ~ Q ~1q , 0S OCi et' n~ 9:*al d01?

April 1,2008 The Pinousgh GfSoypovills "E17 WATER DEPARTMENT 10MR~g py g.

| stAmerica City of Salem F0034S Layee | J-- | Pronpros nays Lot#: D7J150133 e aC Laboy ra, | `Southampton, PA 18966 | ---- | APtorv" | November, 2007 oe 4955YamowSweet Arvada, CO80002 16 303.736.0100.

Jean B.

GLP10-01-02; Interim Report 28 - Analysis of PFBS, PFHS, and PFOS in Groundwater Samples Collected at the Former Sludge Incorporation Area (FSIA) located in Decatur, AL, March/April 2012 Study Title 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 P h o n e :610-701-3761 Author Susan W olf 3M Environmental Laboratory Interim Report Completion Date Date of signing Performing Laboratory 3M Environmental Health and Safety Operations Environmental Laboratory 3M Center, Bldg 260-05-N-17 St.

SEVERN TRENT STL STL Chicago 2417 Bond Slreel University Park, IL 50465 Tel: 70S 534 5200 Fax: 708 534 5211 www.stl-inc.com SEVERN TRENT LABORATORIES ANALYTICAL REPORT JOB NUMBER; 232883 Prepared For: Weston Solutions/ Inc: 1400 W e s t o n Way .

Attachments to Letter to C.

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.

3M Specialty Materials 3M Center St.

1UL&.2.G - 6bQ If fl L_ Barbara Leczynski 05/05/2000 03:37 PM To: Karen Lannon/DC/USEPA/US@EPA, Mary Dominiak/DC/USEPA/US@EPA cc: Subject: followup to perfluorochemicals meeting on April 28 -------------------------Forwarded by Barbara Leczynski/DC/USEPA/US on 05/05/2000 03:31 PM Charles Auer ; 05/05/2000 12:03 PM ro om~ov i JHS- -o zx ro cn CO <=>za ~ ~~ oo om --rn O pq OO To: dchakes1@mmm.com cc: bob.sussman@lw.com, Oscar Hernandez/DC/USEPA/US@EPA, Neil Patel/DC/USEPA/US@EPA, Robert Perlis/DC/USEPA/US@EPA, Barbara Leczynski/DC/USEPA/US@EPA Subject: followup to perfluorochemicals meeting on April 28 Dear Bill and Dan, 3M, We found the meeting very helpful in furthering our understanding of the situation with regard to PFOS and other perfluorochemicals.

n th 2001 Zfp NAjv/l L, ^5C ^ AvoVV>'\l\. l > a b ~>u-ce )b a 4 L # i Ae^^fir- S c< J k ik ' W oe ~n\ii^<Oe3-^ \~i i_cA>- l Cl!

RECEIVED OPPTNCiC 2003 MAR 10 AH II** 5 I Telomer Research Program 1200 South Hayes Street Arlington, Virginia 22202-5050 Tet (703)413-1100 ad.5264 Fax: (703)4136111 M &Q& - I AW Clariant February 14, 2003 Mary F.

..H M 01 N W M AR / AA3 Telomer Research Program 1200 South Hayes Street Arlington, Virginia 22202-5050 Tet (703)413-1100 ext 5264 Face (703)4138111 ^ Clariant (D lD K ) February 14, 2003 Mary F.