AR226-2293 Oebbte J Mulrooney 11/04/2002 12:16 PM cc:To: Catherine A Barton/AE/DuPont@ DuPont Subject FYI (C8 Modeling) - Permit Determination - Discussion with DAQ ------------------- Forwarded by Debbie J Mulrooney/AE/DuPont on 11/04/200212:15 P M Robert L Ritchey 11/04/2002 10:30 A M To: Kart G Kronberg/AE/DuPont DuPont, Michael T Evans/AE/DuPont@DuPont, John E Crum/SE/DuPont@DuPont cc: David F Altman/SE/DuPont@ DuPont, Andrea V Malinowski/AE/DuPont DuPont, M.

AR226-2310 Charles J Zarzecki 03/13/2003 11:02 AM To: Catherine A Barton/AE/DuPont cc: Subject: Re: Our stance on actual sampling Q C a th ie , Actual sampling w ill show low er numbers.

AR226-2511 Akito Abe 04/01/2002 09:46 PM To: Stephen R Peck/SE/DuPont@DuPont cc: Yoshihiro Hayatsu/PO/DuPont@DuPont, Hidetaka Hiromatsu/PO/DuPont@DuPont, Paul K Mathur/CL/DuPont@DuPont, Ta-Wet Fu/SE/DuPont@DuPont Subject: C-8 analysis at W W lab Steve, l imagine you had enjoyed in your Easter holidays.

AR226-2517 Mark E Reeder 05/21/2002 09:20 A M To: Michael G McClusky/AE/DuPont@DuPont cc: Ta-Wel Fu/SE/DuPont@ DuPont Subject: Water Samples The C-8 results on the float tank samples you submitted are listed below.

AR226-2563 DuPont Fluoroproducts September 28, 2001 DuPont Fluafoproilucts Chestnut Run Plaza P.0.

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

ANALYTICAL REPORT STL STL Denver 4955 Yarrow Street Arvada, CO 80002 Tel: 303 736 0100 Fax: 303 431 7171 www.stl-inc.com PFOATFOS Analysis Lot#: D7D180342 Laura Vancho/Jane Hanszczyk NJ American Water 213 Carriage Lane Delran, NJ 08075 Severn Trent Laboratories, Inc .

INTERIM REPORT # 21 - Analysis of Soil Samples STUDY TITLE Analysis of Perfluorobutanesulfonate (PFBS), Perfluorohexanesulfonate (PFHS), and Perfluorooctanesulfonate (PFOS) 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 November 6,2006 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.

AH 26 BJORN.FR!

GLP10-01-02; Interim Report 18 Analysis o f PFBS, PFHS, and PFOS in W ater Samples F S IA -J u n e 2011 GLP10-01-02: Interim Report 18 - Analysis of PFBS.

BACK TO MAIN May 3, 2001 . . .

BACK TO MAIN Im p in g er Studies o f V o la tility o f FC -95 and FC -143 Intoduction and Purpose: Thermospray mass spectrometry was used to quantitate a number of samples for FC-143 and FC-95.

BACK TO MAIN 3M Medical Department Study: T-6314.1 Analytical Report: FACT TO X-028 LRN-U2636 Study Title Determination of the Presence and Concentration of PFOS, PFOSA, M556, and M570 in the 13-Week Dietary Study of Crl:CD (SD) IGS BR Rats Analytical Laboratory Report Title Determination of the Presence and Concentration of Perfluorooctanesulfonate, Perfluorooctanesulfonylamide, M556 and M570 in Liver and Sera Samples Data Requirement Not Applicable Author 3M Environmental Laboratory Study Completion Date February 23, 2001 Performing Laboratories Liver and Sera Analyses Liver and Sera Extractions 3M Environmental Laboratory Building 2-3E-09, 935 Bush Avenue St.