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3 GLP10-01-02 Interim Report 03: Analysis for PFOS, PFHS and PFBS in Decatur, AL Wetlands Edge Environmental Center (WEEC) Soils and Sediments Collected June/July 2010 Study Title 3M Environmental Laboratory Analytical Protocol GLP-10-01-02: 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 Phone: 610-701-3761 Principle Analytical Investigator Cleston C.

Afm 6- o w MECHANISM OF TOXICITY OF A UNIQUE PESTICIDE:m ETHYLPERFLUOROOCTANE SULFONAMIDE (NEPFOS), A .

Po ri . 6 / 4 / 11 TECHNICAL REPORT SUMMARY BACK TO MAIN U.llB ' " ` 2- 5-81 TO: TECH N ICA L COMMUNICATIONS CEN TER - 201-2CN /Important - If report is printed on,both sides o f paper, send two copies to TCC.)

BACK TO MAIN 3M Medical Department Study: T-6316.8 A nalytical R eport: FA C T T O X -097 L R N -U 2 4 5 2 Study Title Oral (Stomach Tube) Developmental Toxicity Study of 2(N-Ethylperfluorooctanesulfonamido)-ethanol in Rabbits Analytical Laboratory Report Title Determination of the Presence and Concentration of Potassium Perfluorooctanesulfonate (PFOS) or another metabolite of 2(N-ethylperfluorooctanesulfonamido)-ethanol (N-EtFOSE) in Liver and Serum Specimens Data Requirement Not Applicable Author 3M Environmental Laboratory Study Completion Date At signing Performing Laboratory Liver and Serum, Extraction and Analyses 3M Environmental Laboratory Building 2-3E-09, 935 Bush Avenue St.

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AR226-1392 CC: Manufacturing Superintendents Process Superintendents Maintenance Superintendents ' Chief Chemist Research Superintendents Power & Services Superintendent J .

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) t ii Wa o(0 H HW N iPont Overview o f Fluoi Lers, C-8 and Parker; _ Operations P resented to th e State o f O hio E nviroi February, 20i Columbus, Obi n A gency IO IO Ol AR226- EID781412 ASH028133 EID781414 I I< Fluoiopo lymers "Super" Polymers Chemical resistance across brol temperature range "Slipperiest substance known to m aif Unique properties/High value in use ASH02B135 r-- v00j 1 H * M1 Confidential DuPont Business Information 4 4 Fluoropolynter- 2000 Global Market Demaiwk($Billions) ASH028136 n Major Indtrstties Served by F lu orop olym ers/elastom ers Aerospace/Military Automotive/Transportation Chemical/Petrochemical Processing Semiconductor/Electronics Manufacture Telecommunications Power Generation/Pollution Control Consumer Housewares ASH028137 H-J Htb> H Confidential DuPont Business Information Key requirements: Temperature and chemical resistance; electrical performance; low flammability M ^orfises:, Wire and cable insulation Fuel and hydraulic hoses Seals/bushing Space apparel Societal Benefits: Passenger ASH028138 ` ' \.II.

AR226-2381 c- 8 EXWIRONMENTAL STATUS History Industrial Hygiene Engineering Changes Protective Equipment Air Monitoring Blood Sampling Long-Term and Short-Term Employees New Hires C-8 Material Balance Off-Plant Disposal In Product To River To Atmosphere Ground Level Modeling Results ENVIRONMENTAL ALTERNATIVES PIP Replace C -8 - C 7F 15CO2NB4 With TBSA - R fC H 2CH2S03H fine Powder EID09134I No Known Substitute Two Expensive Alternatives - Scrubbing of Vents - Conversion to Presumed Innocuous Compound C 7F 15C02NH4 C 7F 15H + C02 + N H 3 RJZQ26744 EID091341 8/ SI 6/27/78 6/12/79 8/13/79 9/79 11/12/79 C "8 REVIEW ' HISTORY BEGAN USE OF C-8 IN DISPERSION POLYMERIZATION, ` FEW PRECAUTIONS'IN HANDLING, ' `: ADVISED EMPLOYEES THAT 3M' FOUND ELEVATED ORGANIC FLUORINE LEVELS IN BLOOD OF WORKERS EXPOSED TO FLU0R1NATED SURFACTANTS, WE WOULD REVIEW OUR SITUATION, ADVISED EMPLOYEES THAT THE REVIEW WAS COMPLETE WITH NO PROBLEMS FOUND, AS AN ADDITIONAL STEP FLUORINE LEVELS IN SOME EMPLOYEES WOULD BE CHECKED.

AR226-2578 Laura Waller Document 10 of 16 ASH017 4 91 E1D477528 OHIO RIVER WATER SAMPLING PROPOSAL FOR THE WASHINGTON WORKS FACILITY AND THE LETART LANDFILL Date: February 2002 Project No.: D6WW7423 CORPORATE REM EDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 ASH017492 EID477529 Ohio River W ater Sampling Proposal Table of Contents TABLE OF CONTENTS 1.0 Introduction............,,................................. ................................... ....... ..1 2.0 River Water Sampling Approach Near The Washington Works Facility............... ...3 3.0 River Water Sampling Near the Letart Landfill....................................................... ..5 Table 1 TABLES Proposed River Water Sampling Plan DuPont Washington Works Facility and Letart Landfill Figure 1A Figure 1B Figure 2 FIGURES Proposed Ohio River Water Sampling Locations - Upstream, DuPont Washington Works Facility Proposed Ohio River Water Sampling Locations - Downstream, DuPont Washington Works Facility Proposed Ohio River Water Sampling Locations, Letart Landfill Site rev2rfver.doc Feb. 2 7 ,0 2 Wilmington, DE j A SH 017493 EID47753G Ohio Rivet Water Sampling Proposal Introduction 1.0 INTRODUCTION A multi-media Consent Order (Order No.

AR226-2832 HASKELLLABOR A TO R YFQ R TOXICOLOGY ANpINDUSTRIALMEDICINE Company Sanitized.

AR226-2905 FOR DU PONT USE ONLY E.