-2- Absorption of FC-l43-*^C In Rets After e Single Orel Dose December 28, J979 WC/*\ JAN 17 1980 Conducted et: During: Conducted by: Report by: Reviewed by: Rlker Leboretories, Inc.

&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.

A f l J2A6 SUMMARY OF A STUDY CONDUCTED WITH POTASSIUM PERFLUOROALKYL SULFONATE (PFOS) AT DUPONT Type: Species/S train: Sex/Number: Exposure Period: Frequency of Treatment: Exposure Levels: Method: Biopersistence Screening Study Rats/Crl :CDSD(IGS)BR Male/5/group 5 or 10 days; 94 days of recovery Ad libitum for 5 or 10 days Ammonium perfluorooctanoate: 20 mg/kg Potassium perfluoroalkyl sulfonate (PFOS): 10 mg/kg Six groups of rats were administered ammonium perfluorooctanoate, 1 group received the test substance for 5 consecutive days and the other 5 groups received the test substance for 10 days.

CAS Number 4151-50-2 3M Company AR.AZGj&gO 1 Voluntary Use and Exposure Information Profile N-ethyl perfluorooctanesulfonamide I.

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 600 110 NORTH MAIN STREET DAYTON, OHIO 45402-1786 937-228-2838 FAX: 937-228-2816 Ro b e r t a .

AR226-2040 I'-' ir OFFENBJL 09/22/98 01:48 PM To: BROWNAL, ROGERSJD , RURAK , MORRISWC cc: MAJTSORR, MAHANEY , PLAYTIS , SZAKATBK , ZIPFEL Subject: C-8 The Industrial Hygiene Air Sampling results for c-8 in some sample locations are higher this year then they were last year.

AR226-2055 EXD077151 EID077152

AJP002348 000 AR226-2089 MUOHOH 1 -K R , 8-H R AND ANNUAL HEA13 C-8 CONCENTRATIONS OVER THE FIVE YEAR S ?

AR226-2411 I- INTEROFFICE MEMORANDUM Date: 2o-Sep-1990 10:31arn From: Peter D.

AR226-2485 Walter R Tong 10/08/2001 10:38 AM To: Ta-W ei Fu/SE/DuPont@DuPont cc: Takuya.ichida@daikin.co.jp, Satoshi_komatsu@notes.che.daikin.co.jp, Charles J Noelke/AE/DuPont@DuPont, Steven H Swearingen/AE/DuPont@DuPont, Katsunosuke Kitagawa/PO/DuPont@DuPont, Nancy L Tanzola/AE/DuPont@DuPont, David R Wallace/AE/DuPont@DuPont, Shawn E Messinger/AE/DuPont@DuPont Subject: Re: PROPOSED APFO SPECIFICATIO NS How does this list compare with the FAX th at Daikin sent?

AR226-2561 September 4, 2001 Samantha P.

AR226-2767 FOR DU PONT USE ONLY E.

AR226-2775 FOR DU PONT USE ONLY E I .

AR226-2978 Du Pont H LR 477-92 T P A P J ...5 .Q BII Study Tftlo STATIC, ACUTE, 96-HOUR LC50 O F H-19,173 T O FATHEAD MINNOWS, Pimephates pmmelas Data Requirement United States Environmental Protection Agency Environmental Effects Test Guidelines Subdivision EG-9 Author Kevin N.

AR226-3063 DuPont HLR 903-96 HASKELL LABORATORY FOR TOXICOLOGY AMD IHDUSTRIAL MBDZCZMM STATIC, ACUTX 48-HOUR 8CREEHZMG TBST OF H-21952 TO Daofania i-- an* POKPOSI: This is a rangefinding study designed to provide an estimate of aquatic toxicity using fixed test concentrations and data measurements nat predetermined intervals. w w .