3M General Offices >p 3M March 17, 2000 3M Center St.

$X )ltrO % t Analytical Laboratory RepSotrutdoyn PTritelseence and Concentration of Potassium Perfluorooctanesulfonate in Serum and Liver of Sprague-Dawley Rats Exposed to PFOS via Gavage REPORT AMENDMENT NO. 1 Am1e9nAdpmrieln2t00D0ate: Performing Laboratory 3M Environmental Technology & Safety Services 3M Environmental Laboratory 935 Bush Avenue St.

Final Draft Guidance Document Telomer Research Program (TRP) AR226-1888 Guidance Document Best Analytical Practices for TRP Studies Author Marilyn Stadalius Critical Path Services 300 Foulk Road, Suite 1C Wilmington, Delaware 19803 Completion Date March 2004 RECEIVED OPPT NCIC 2004 DEC 22 AM 11:20 Sponsor Telomer Research Program Asahi Glass Co., Ltd.

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AR226-2306 Charles J Zarzecki ' 03/03/2003 01:16 PM To: Catherine A Barton/AE/DuPont cc: Subject: Re: C8 meeting Q Cathy, Yes, they can be done, however, not until Wednesday as I am on m y way out the door to Front Royal.

AR226-2320 Ann K Masse 04/02/2003 06:03 PM To: Irene A Legiec/AE/DuPont@DuPont, Mark D Richmond/AE/DuPont@DuPont cc: Catherine A Barton/AE/DuPont@DuPont Subject: Dispersion modeling data folks, W e need to have this data to Cathy by the end of next week (4/11).

AR226-2323 / Irene A Legiec 04/03/2003 10:40 AM To: Ann K Masse/HO/DuPont@DuPont cc: Mark D Richmond/AE/DuPont@DuPont, Catherine A Barton/AE/DuPont@DuPont, Richard S Viekery/AE/DuPont@DuPont, Maria S Angelo/AE/DuPont@DuPont, Paul J Gorzsas/ABDuPont@DuPont Subject Re: Dispersion modeling data Q Ann, W e have a ballpark number for influent data.

AR226-2359 J DRAFT PHASE II QUALITY ASSURANCE PROJECT PLAN DUPONT WASHINGTON WORKS SITE WASHINGTON, WEST VIRGINIA ) Date: March 2004 Project No.: 507532 18983990.04006 ||S |) 'i l i r CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 EXP000431 Draft Document Do Not Gite or Quote, March 30, 2004 Draft Phase II Quality Assurance Project Plan Table of Contents TABLE OF CONTENTS 1.0 Project Management........................................................... ........................................ 1 1.1 Project Background...............................................................................................1 1.2 Project Description..............................................................................................2 1.3 Project Organization............................................................................................. 3 1.3.1 Project Director..................................................................................... 3 1.3.2 Project Manager.............................................................. 4 1.3.3 Health and Safety Officer........................................ 4 1.3.4 Project Geologist..................................................... 4 1.3.5 Technical Consultants............................................................................ 4 1.3.6 Technical and Support Staff.................................................................. 4 1.3.7 Quality Assurance Officer.................................................. 5 1.3.8 Project Chemist................... !.........................................................

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.

AR226-2460 y w y w w w y w w w y tw * v> -- * w ?

AR226-2691 13 AR226-2691 DuPont EMSE Report No. 15-03 Study Title Accelerated Biodegradation of 8-2 Telomer B Alcohol- A preliminary Screening Study j I Test Guideline This study uses the concept o f OECD Guideline for Testing o f Chepiicals; Section 3: Inherent Biodegradability (1992).

AR226-2752 Copies to: E.

# AR226-2872 Copies to: E.

AR226-2919 FOR DU PONT USE ONLY E .

tFMrecher'ie AR226-3140 CONFIDENTIAL SPONSOR Elf Atochem SA.