BIOCONCENTRATION - REVISED TEST SUBSTANCE____________________________________________ Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonicacid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: Sample from 3M production lot number 217.

3M ENVIRONMENTAL LABORATORY PROJECT NO E05-0120 iflv l Analytical Report Revised August 12, 2005 Initial Quantitative Screening of Commercial Lots of Human Serum Obtained in 2004 for Endogenous Fluorochemicals Using Protein Precipitation and Liquid Chromatography/Tandem Mass Spectrometry Laboratory Request Number: E05-0120 Testing Laboratory 3M Environmental Health and Safety Operations 3M Environmental Laboratory 3M Environmental Laboratory Project Lead Mark E.

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At&t> STUDY TITLE Extraction of Potassium Perfluorooctanesulfonate from Egg Membrane, Albumen, and Yolk for Analysis Using HPLC-Electrospray/Mass Spectrometry DATA REQUIREMENTS Analytical Method Requirements STUDY DIRECTOR Sean Gallagher STUDY COMPLETED ON September 06, 2001 PERFORMING LABORATORY / TESTING FACILITY Centre Analytical Laboratories, Inc.

AR226-2104 Test R esults Sam ple Date R ange Concentration Range A ction Level Industrial Hygiene mm 12/31/77 100% Sam ple D t Sam ple# D uration Type Em ployee Name B T O : 08 TEFLON L O C : 701 FINE PO W D ER D RYER-EAST SIDE #2 2/3/77 62672 Z Pers Chem ical C-8 B TO ; 08 TEFLON L O C : 702 FINE PO W D ER D RYER CO NTRO L ROOM (ALSO S E E TTF031 2/3777 57138 Z C-8 B TO : 08 TEFLON L O C : 703 FINE PO W D ER PACKO U T ROOM 213/77 49590 Z C-8 B TO : 08 TEFLON L O C : 704 A/S - FINE PO W D ER C-8 W EIGH HOOD 2/3/77 51160 Z C-8 Cone Unit Percent <0.1 PPM 0.0% <0.1 PPM 0.0% 0 .1 PPM 0.0% <0.1 PPM 0.0% AJP04114 Tuesday, January 16,2001 12:48:12 PM Page 1 of 1 EID 11 324 9

AR226-2155 C atherine A Barton j j 08/27/2001 03:24 PM ' To: Debbie J MuIrooney/AE/DuPont@ DuPont, Robert F Pinehot/DEV/AE/DuPont DuPont cc: Catherine A Bartan/AE/DuPorrt@ DuPont Subject: Recap of our meeting Just s o w e're on the sam e p age (and so l can rem em ber w hat w e sa id we'd do a w eek from now), I've sum m arized som e notes from our meeting today.

TestResults AR226-2131 file:///C|/WND.

AR226-2192 Ta-Wei Fu 08/27/2001 11:34 PM To: Stephen J Gissy/AE/DuPont@DuPont, Oscar T Garza/AE/DuPorrt@DuPont, Fred M Lentz/SE/DuPont@DuPont, Robbin Banerjee/AE/DuPont@DuPont, Paul K Mathur/CL/DuPont@DuPont, David M Rurak/AE/DuPont@DuPont, Raymond C Butterworth/CL/DuPont@DuPont, John R Flynn/AE/DuPont@DuPont, Amy L Brown/AE/DuPont@DuPont, Thomas W Mahlberg/SE/DuPont@DuPont cc: Robert F Pinchot/DEV/AE/DuPont@DuPont, Chris E Shoop/AE/DuPont@DuPont, Roger J .

AR226-2268 T o: Catherine A Barton/AE/Du Pont@ DuPont co: Subject: Spruance C 8 A ssessm ent W ith the legal suit, you m ay want to talk with Legal and not create any docum entation that is not necessary-- Bob -----------Forwarded by Robert L Dunn/AE/DuPont on 03/28/2002 03:27 P M ------- Thom as V Robertson 03/28/2002 02:56 P M T o: Catherine A Barton/AE/DuPont@ DuPont cc: Robert L Dunn/AE/DuPont @ DuPont, W ayne C W alpole/AE/D uPont D uPont Subject: Spruance C 8 A ssessm ent P e r your request, in support of your work with Circleville, I am providing below a m em o docum enting the 1991 Spruance w astewater assessm ents for C8.

AR226-2300 fi Charles J Zarzecki 02/21/2003 1230 PM To: Catherine A Barton/AE/DuPont co: Subject: Actual 2002 Results C a th y, The maximum annual prediction fo r actual 2002 emissions is 1.36 ug/m3, occurring at the plant property fine.

AR226-2316 y Charles J Zarzecki ' 03/20/2003 08:08 A M To: Catherine A Barton/AE/DuPont cc: Subject R e lookee what I found 0 .

AR226-2599 f l ?

AR RR6 _ 3664 PFCAs and Precursors Simplified Terminology/Sources/Fate Consultation Meeting on PFCA Action Plan February 2006 000092 Purpose > Intended to provide terminology and simplified background on PFCA sources and environmental fate. > Useful in discussing the proposed Action Plan. 000093 Presentation Outline > Perfluorinated Carboxylic Acids > Fluorotelomer Intermediates > Fluorotelomer Based Substances > "Residuals" > Pathways to PFCAs Via Residuals Via degradation of Fluorotelomer Based Substances 3 000094 Perfluorinated Carboxylic Acids (PFCAs) > General structure: > Can be referred to by the number of carbons in the molecule; e.g..

AR M 6 - 3 6 U UNITED NATIONS ^ United Nations Environment %wjf Programme Stockholm Convention on Persistent Organic Pollutants Persistent Organic Pollutants Review Committee First meeting Geneva, 7-11 November 2005 Item 5 (e) of the provisional agenda* Consideration of chemicals proposed for inclusion in Annexes A, B and C of the Convention: Perfluorooctane sulfonate SC U N EP/PO PS/PO PR C . 119 Distr.: General 24 August 2005 Original: English Perfluorooctane sulfonate proposal** Note by the Secretariat 1.