3M Specialty Materials June 28, 2000 c f yr - - 13M Center S65t.1P7a3u3l, M11N0055144-1000 0300 M 22.6- 062% r&(-5s>, m-o ---aonmmo ---F3aCo coom VIA EXPRESS MAIL Dr.

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.

DuPont Legal Andrea V.

A Pharmacokinetic Study of Potassium Perfluorooctanoate in the Cynomolgus Monkey Southern Research Institute Study ID: 9921.4 January 14, 2003 Final Report on A Pharmacokinetic Study of Potassium Perfluorooctanoate in the Cynomolgus Monkey To: 3M Corporation P.O.

Toxicological Summary PFOS Dietary Acute Mallard Study Test Substance: Perfluorooctanesulfonate (PFOS) Structure: 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, CAS# 2795-39-3 Remarks: The test substance is a white powder (3M lot #217).

EPL EXPERIM ENTA L PA THO LO G Y LA BO RATOR IES, INC.

amr r i 63050000008/S Monitoring and Reduction Efforts in Decatur, AL Daikin America November 8, 2004 Outline of Presentation Overall site objectives Waste Water and Sludge - Monitoring Results - Reduction Project to Reduce PFOA in Waste W ater Surface Runoff Monitoring Results Soil and Groundwater Monitoring Results Reduction of PFOA from Vaporizer Summary of Overall Site Reduction Overall Site Objectives Identify the major sources of PFOA through screening level monitoring - Daikin - Other/ Implement measures to reduce PFOA releases to the environment as soon as possible Waste Water Monitoring Waste W ater to Tennessee River (NPDES Permit AL0064351,DSN 001) Date 7/13/2003 9/25/2003 11/11/2003 12/10/2003 1/6/2004 2/23/2004 3/8/2004 4/12/2004 5/11/2004 6/2/2004 7/13/2004 8/5/2004 9/16/2004 10/7/2004 Sample 677 Duplicate Average' 700 689 Field Blank Units 1.11 ng/mL or ppb 1010 997 1004 ng/mL or ppb 1130 1100 1115 ng/mL or ppb 599 599 0.282 ng/mL or ppb 1260 1310 1285 1.8 ng/mL or ppb 546 546 ng/mL or ppb 761 874 818 ng/mL or ppb 1960 2030 1995 ng/mL or ppb 1610 1630 1620 ng/mL or ppb 1520 1520 ng/mL or ppb 901 901 ng/mL or ppb 426 424 425 ng/mL or ppb 1450 852 1540 851 1495 852 ng/mL or ppb ng/mL or ppb Type 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite Exygen Report# L34865 L35195 L0001297 L0001445 L0001562 L0002120 L0002044 L2328 L2477 L0002651 L0003031 L0003076 L0003412 L0003561 Sludge Monitoring Results Sludge from Utility (Sent to Subtitle D Landfill Permit # 40-08 by ADEM) Date 9/25/2003 12/10/2003 3/8/2004 5/11/2004 8/5/2004 10/7/2004 Sample 9.4 29.1 6.43 10.40 2.55 3.97 Duplicate 9.3 28.3 6.36 10.70 2.31 4.04 Average 9.3 28.7 6.4 10.6 2.4 4.0 % Solids 46.94 48.73 55.65 54.32 49.46 56.15 Units ug/g or ppm ug/g or ppm ug/g or ppm ug/g or ppm ug/g or ppm ug/g or ppm Type 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite 24 hr Composite Reported on Dry Weight Basis Exygen Report # L35195 L0001445 L0002044 L2477 L0003076 L0003561 Telomer Finishing Facility Waste W ater from Telomer Finishing Facility to POTW (SID Permit IU 0852 00384, DSN 006) Date Sample Duplicate Average Field Blank Units 7/15/2003 153 163 158 ND ng/mL or ppb 12/11/2003 67 63 65 ng/mL or ppb 3/26/2004 15.7 15.7 ng/mL or ppb 5/12/2004 47.9 46 46.9 ng/mL or ppb 8/4/2004 54.4 54.4 ng/mL or ppb Type Grab from tank Grab from tank Grab from tank Grab from tank Grab from tank Exygen Report # L34865 L0001445 L2328 L0002651 L0003076 Project to Reduce PFOA in Waste Water PFOA Reduction Waste Water Stream PFOA Reduction Waste Water Stream PFOA Reduction Waste Water Stream Project Schedule: - Installation Complete: - Start-up/Commissioning - Normal Operation: July 04 Aug-Nov 04 Dec 04 Project Status: - Capital Cost: - Initial results shows well. - System nearing turnover to Operations.