Toxicological Summary PFOS Dietary Chronic Definitive Reproductive Study: Northern Bobwhite 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-heptadecafluoro, potassium salt.

= ol ES 3M ENVIRONMENTAL LABORATORY AL2261934 Final Report Analysis of PFOS and PFOA in Aqueous Samples 3M Dyneon, Oakdale Minnesota Laboratory Request Number: E05-0007 - Method Requirement: 3M Method ETS-8-154.1 (modified) Testing Laboratory 3M EHS Operations 3M Environmental Laboratory Building 2-3E-09 - or 935 Bush Avenue St.

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AR226-2098 TestWgsuh"S Sarnple Date Range Conesntratlon Range Action Level Industrial Hygiime 1/1/58 1201/96 100% Sample Dt Sample 9 Duration Type Employee Name BTO: 06 LOC: 048 TEFLON B-162 OUTSIDE SMCIKING AREA - 2ND LEVEL 1/26(99 7719 380 A 1/3098 7718 360 A 2/393 7721 3SO A wigs 8019 380 A S/iBIEIB 8020 360 A BUSS 8192 24) A S/14S8 8222 360 A 6/1496 8223 380 A 9/4B6 8247 380 A 11/1688 8401 360 A Pen; Chemical 04/FC-.143 C-8/FC-143 CWC-143 M/PC-)43 C.a/FC-143 C.8/F&.143 C^/FC-143 C-a/FC-143 C-8/FC-143 C-WC-143 BTO: 08 LOC: 101 TEFLON P/8 - TPE FIELD OPERATOR (08PA) 1/3098 27147 2898 27150 360.

TasfReiiulte AR226-2127 fae:///C|/WINDOWSArEMP/PolyroeCrs-8 7-24-78 tfara 1-3-98 23 pages.hta lof43 Test Results Sample Date Range Concentration Range Action Level Industrial Hygiene 7/24/78 1/3/98 100% Sample Dt Sampled Duration type Employee Name Pets BTO; LOG: 18 TEFLON COPOLYMERS 001 FEP OVENS NORTH SIDE 12/19/79 47723 Z 1/15/80 47724 Z 1/22/80 47726 Z a/a/so 47726 Z Chemical Cone Unit Percent C-8 0.0005 PPM 0.0% C-8 0.0006 PPM 0.0% C-8 0.0009 PPM 0.0% 08 0.0095 PPM 0.0% BTO: LOC: 18 TEFLON COPOLYMERS 002 FEP OVENS SOUTH SIDE 12/19/79 47601 .Z. 1/25/80 47602 Z C-8 0.0001 PPM 0.0% C-8 0.0031 PPM 0.0% BTO; LOC: 18 TEFLON COPOLYMERS 003 #1 OVEN COOLING TOWER 2/5/81 54696 Z 2/11/B1 54697 Z 3/17/81 54688 Z 5/23/81 54699 Z 8/10/81 54700 2 8/11/81 54701 Z C-8 0-8 C-8 C-8 t> C-8 C-8 0.0001 PPM 0.0% <0.0001 PPM 0.0% 0.0002 PPM 0.0% -0 <0.0001 PPM OS '0 0.0% )--* 0.0001 PPM 0.0% <0.0001 PPM 0.0% 8/28/20014:49 EID129308 TesfResults fiW//C|/WINDOWS/TEMP/PolymeisC-8 7-24-78 thru 1-3-98 23 pagesAtm 8/12/81 S4702 BTO: LOC: 18 TEFLON COPOLYMERS 004 US.

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AR226-2386 CONFIDENTIAL Polymer Products Department Research and DttvelopiaenC Division Experimental Station y?

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AR226-2553 To: oo: Subject: Andraw S Hartten/AE/DuPont@DuPont request for information on pBrfluorochemicals can you mate a meeting this afternoon at 3:15 at chestnut run 711 ..------...------ Forwarded by Isidores J Zanikos/AE/OuPont on 04/20/2000 08:05 AM - Robert F_Pinc;hot_04^p^Op008,p4_AH4 ___________ To: Isidores J Zanlkos/AE/DuPontQDuPont cc: Subject: request for information on perfluorocriemicals See attached.

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FOR DUPONT USE ONLY AR226-2791 Approximate Lethal Concentration of Haskell Laboratory Report No. 276-85 MR No Haskeli E.

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AR226-3053 Local Lymph Node Assay Screen with H21953 The Local Lymph Node Assay (ULNA) screen with H21953 in female-CriA/lHsd mice.