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&tfGt' fa> iooosnyAP* \ 3M SPECIALTY ADHESIVES & CHEMICALS ANALYTICAL LABORATORY ' To: ' From: Leo Gehlhoff- (309727) -3M Chemicals - 236-2A-01 Tom Kestner - (3-5633) SA&C Analytical Lab - 236-2B-11 Request # 's 53030 ARXU-05CM Subject: Fluorochemical Isomer Distribution by 19F-NMR Spectroscopy Date: December 1, 1997 SAMPLE DESCRIPTIONS: * FC-95, lot # 217 (T-6295); Nominal product = CFi7-S03(-) K(+) INTRODUCTION: This sample was subjected to a 19F-NMR spectral analysis method to determine the identities and relative concentrations of the fluorochemical isomers and as many other identifiable impurity components as possible.

IHTEROFFICE MEMORANDUM DFarte:: Dept : Tel Mo: 23-Apr-1997 02 :12pm DAVID E.

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A 2 2 2 -lclort Report Title Evaluation of the Northwest Bioanalytical Method Validation Reports for P F O S and Related Analytes in Human Serum or Plasm a in Meeting the Requirements of the _________ EDABioanalyticaLM ethod Validation Q A I Report No. 405-503 Data Requirement Full Validation of Bioanalytical Method Author Nancy Benson Philippe O urisson Quality Associates, Inc. 9017 Red Branch Road, Suite 102 Columbia, M D 21045 Sponsor 3M Environmental Laboratories 935 Bush Avenue Bldg 2-3E-09 St Paul, M N 55106 Report Date December 31, 2001 Report Number QAI 405-503 Number of Pages 26 337 TABLE OF CONTENTS I.

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AR226-2472 '# Stephen R Peck 03/07/2000 07:48 AM To: Carey E Cole/CL/DuPont@DuPont, Roger J Zipfe[/AE/DuPont@DuPont cc: Ta-Wei Fu/CL/DuPont@DuPont Subject: 3m fluoride?

AR226-2523 % THIRD QUARTER 2003 C-8 SURFACE WATER AND GROUNDWATER MONITORING REPORT FOR WASHINGTON WORKS FACILITY AND LOCAL, LETART AND DRY RUN LANDFILLS WASHINGTON, WV Date: October 2003 Project No. : D6WW7423.01 18983632.00028 18983633.00026 18983634.00026 HI CORPORATE REM EDIATIO N G R O U P An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 ASH026479 EXD779761 E ID 779761 Surface W ater And Groundwater Monitoring Report Table of Contents TABLE OF CONTENTS 1.0 Introduction..,,...,.......--....*............ 2.0 C-8 Analytical Reporting............. . 3.0 Washington Works Facility 4.0 Local Landfill............................. ... 5.0 Letart Landfill................... ....:...... 6.0 D r y Run landfill,. >*>********>**************'***************#********>** 7.0 References,.,...,.,............ ............... ........................ ....................... ............................. .8 fable 1.0 Table 1.1A Table 1.1B Table 2.0 Table 2.1A Table 2.1B Table 3.0 Table 3.1A Table 3.1B Table 4.0 Table 4.1A Table 4.

AR226-2543 RCRA FACILITY INVESTIGATION PLAN BnPont W ashington W orks W ashington, W est Virginia September 24,1997 DEBS Project No, 7179 Prepared by DuPont Corporate Remediation Group & DuPont Environmental Remediation Services Barley Mill Plaza 27 P.O.Box 80027 Wilmington, Delaware 19880-0027 JSO01918 BD624915 DERS Project No. 7179 September 24,1997 Page!

AR226-2623 Draft: Prepared at the Request of Council AR226-2623 Data and Modeling Procedures Dispersion modeling was performed using the U.S.