Section I - Nylon-Teflon 7 - 2- August 31, 1981 ^ezz4rH55 C.

AR226-1737 Toxicological Summary PFOS Dietary Chronic Pilot Reproductive Study: Mallard Test Substance: Perfluorooctanesulfonate (PFOS) Structure: 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoropotassium salt, CAS# 2795-39-3 Test Remarks: The test substance is a white powder (3M Lot #217).

.

FINAL REPORT PROTOCOL 418-028 ORAL (GAVAGE) COMBINED REPEATED DOSE TOXICITY STUDY OF T-7706 WITH THE REPRODUCTION/DEVELOPMENTAL TOXICITY SCREENING TEST SPONSOR'S STUDY NUMBER: T-7706.1 FINAL REPORT DATE: 31 JULY 2003 PROTOCOL 418-028 - ORAL (GAVAGE) COMBINED REPEATED DOSE TOXICITY STUDY OF T-7706 WITH THE REPRODUCTION/DEVELOPMENTAL TOXICITY SCREENING TEST SPONSOR'S STUDY NUMBER: T-7706.1 TABLE OF CONTENTS SUBJECT 1.

Voluntary UEIP, Ammonium Perfluorooctanoate Voluntary Use and Exposure Information Profile Ammonium Perfluorooctanoate (APFO) I.

CHEM EHSR 236 1B 3M Chemicals 651' 733 1958 12/09 '98 13:22 NO.461 01/01 3M Center S.

AR226-2209 Roger J Zipfel 11/02/2001 04:23 PM * To: Debbie J Mulrooney/AE/DuPont@DuPont cc: Subject: Info on C-8 density Debbie, attached is the msds for C-8 in the powder form, it says that the solids density is 0.4-0.5. i think this is the bulk density of the powder.

Z-47 REV. 10-50 PB W A S H IN G T O N W O R K S P .O .

3M Katherine E.

AR226-2855 HASKELL LABORATORY RAYMOND L.

AR226-3123 DuPont-3101 HASKELALNLDAIBNODRUASTTORRIAYLFMOERDTIOCIXNIECOLOGY H-24108: STATIC, TAOCUDTaEph4n8ia-HmOaUgnRaSCREENING TEST PURPOSE: Ttheisst cisonacreanntgreaftiionndsinagnsdtuddaytadmeseiagsnuerdemtoepnrtsovaitdpereadneetesrtimmianteedoifnateqruvaatlisc. toxicity using fixed GENERAL INFORMATION WORK tHRiAEi sQSTMKUEELS.TL1.

fin R-3(f~lf7 > 000426 C-8 TREND IN BLOOD FEP PROCESS OPERATOR (17) FEP SERVICE OPERATOR (18) RAW DISPERSION PROCESS OPERATOR (18) GRANULAR PROCESS OPERATOR (7 ) FINE POWDER SERVICE OPERATOR (19) MONOMER OPERATOR (31) C-8 IN BLOOD PPM) 1981 1982 1983 1984 1985 1986 1.53 1.48 1.14 1.09 1.09 1.22 0.60 0.59 0,57 0.53 0.53 0.56 7.66 6.67 6.36 6.38 5.96 6.57 3.44 3.12 2.64 2.70 2.38 2.93 2.25 2.07 1.74 1.59 1.37 1.37 1.01 1.02 0.83 0.82 0.81 -- ALL TEFLON * OPERATORS (490) 0.98 0.92 _ MSB mm 00042 * DuPont's registered trademark, for its fluorocarbon resin a \ 003546-566 - 06/09/87 - RJZskst

m PATTON BOGGS, ATTORNEYS *T U W VIr**.M.'

3M Corporate Toxicology and Regulatory Services 3M Center, Building 0220-06-E-03 St.

3M 3M General Offices QrtjM-M8il 3M Center St.