ATTACHMENT TO LETTER TO C.

BACK TO MAIN ACUTE CONTACT TOXICITY TO TERRESTRIAL INVERTEBRATES (HONEY BEE) TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks field: The 3M production lot number was 217.

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AR226-1742 PFOS: A PILOT REPRODUCTION STUDY WITH THE MALLARD FINAL REPORT WILDLIFE INTERNATIONAL, LTD.

OPPI Ht H i t 17 PI 18 Am onio pyi - ok. o \W i DuPont Legal Andrea V.

A Pharmacokinetic Study of Potassium Perfluorooctanesulfonate in the Cynomolgus Monkey Southern Research Institute Study ID: 9921.6 April 22, 2003 Final Report on A Pharmacokinetic Study of Potassium Perfluorooctanesulfonate in the Cynomolgus Monkey To: 3M Corporation P.O.

Study Title Soil Adsorption/Desorption Study o f Potassium Perfluorooctanesulfonate (PFOS) Data Requirem ent Based on OECD 106 A u th o r M ark E.

BACK TO MAIN 3M FLUOROCHEMICAL SUBMISSION TOXICOLOGY, EPIDEMIOLOGY AND MEDICAL SURVEILLANCE February 2005 Click on Study Title to View Report February 10, 2005 Geary Olsen and Larry Zobel (3M), Comments of the 3M Company to the EPA Sci ence Advisory Board PFOA Review Panel, February 10, 2005 February 10, 2005 John A.

M&S.6 _ 0637 If Charles Auer ' 05/16/2000 03:42 PM To: waweppner@mmm.com, dchakes1@mmm.com cc: Oscar Hernandez/DC/USEPA/US@EPA, Jennifer Seed/DC/USEPA/US, Barbara Leczynski/DC/USEPA/US@EPA, Karen Lannon/DC/USEPA/US@EPA Subject: PFOS items Following up on my phone call with Bill Weppner on May 15, I want to confirm a few points: 3M has arranged a discussion with the Commission of the EU on May 24 in Brussels to discuss PFOS.

NORTHERN KENTUCKY OFFICE SUITE 340 1717 DIXIE HIGHWAY COVINGTON, KENTUCKY 41011-4704 606-331-2838 513-381-2838 FAX: 513-381-6613 DAYTON, OHIO OFFICE SUITE 900 110 NORTH MAIN STREET DAYTON, OHIO 45402-1786 937-228-2838 FAX: 937-228-2816 R o b e r t a .

AZ2Z(o- tf3C> February 1, 2005 Data Validation for PFOS/PFOA Oakdale Project (MDH Sample Numbers 200501211-200501219) Sample receipt: Samples were received in good condition.

AR226-2048 / / Ta-Wei Fu 07/30/2001 08:01 AM .

AR226-2196 From: Fred M Lentz on 08/28/2001 07:54 AM To: Ta-Wei Fu/SE/DuPont@DuPont cc: Stephen J Gissy/AE/DuPont@DuPont, Oscar T Garza/AE/BuPont@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, Robert F Pinchot/DEV/AE/DuPont@DuPont, Chris E Shoop/AE/DuPont@DuPont, Roger J Zipfel/AE/DuPont@DuPont, Alvin H Gibson_Jr/CL/DuPont@DuPont, Debbie J Mulrooney/AE/DuPont@DuPont, Kenneth P Kelch/AE/DuPont@DuPont Subject: Re: ACTION ITEMS FROM APFO DISPERSION MODELLING D Ta-W ei If you have not already done so, please take a moment to review these results with Ken Kelch.

AR226-2216 Chris E Shoop 11/19/2001 03:08 P M _________ _______ _ To: Ralph M Aten/AE/DuPont@DuPont cc: Debbie J Mulrooney/AE/DuPont@DuPont Su bject Particulate / C -8 Em issions from Semiworks Ralph, In about August of this year 1used information from the semiworks air permit application that you were preparing to provide data to the state on total C-8 emissions for the site.