BACK TO MAIN SRPT REPORT DETERMINATION OF THE PARTITION COEFFICIENT (N-OCTANOL/WATER) OF T-5874 BY HIGH PERFORMANCE L I Q U I D CHROMATOGRAPHY (HPLC) -.-.

3M Medical Department Study: T-6295.4 Analytical Report: FACT TOX-002 LRN-U2121 Study Title 104-Week Dietary Chronic Toxicity Study with Perfluorooctane Sulfonic Acid Potassium Salt (PFOS T-6295) in Rats (Covance Study No.: 6329-183) Analytical Laboratory Report Title Determination of the Presence and Concentration of Perfluorooctanesulfonate (PFOS) in Liver and Serum Specimens of Crl:CD(SD) IGS BR Rats Exposed to Perfluorooctane Sulfonic Acid Potassium Salt (PFOS T-6295) Data Requirement Not Applicable Author 3M Environmental Laboratory Study Completion Date At signing Performing Laboratories Liver and Serum Analyses 3M Environmental Laboratory Building 2-3E-09, 935 Bush Avenue St.

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0.00 PTFE Based CCL -0.20 Other Based CCL Insertion Loss(dB/cm) -0A0 -0.60 -0.80 -1.00 0.0 20.0 40.0 60.0 frequency(GHz) SO 0 Fig 2.Transmission Loss of PTFE CCL and Other CCL

AR226-2356 "Steve Williams" <steve.willlams@epa.state.oh.us> on 01/27/200410:17:55 AM To: cc: Subject: Andrew S Hartten/AE/DuPont DuPont "Michael Preston' <michael.preston@epa.state.oh.us> Re: Draft Surface Soil Procedure Andrew, I looked over the draft soil/biota sampling procedure and have a few questions/comments.

E.tiGlNEERiMS ROMP'-nAT^ y^-' AR226-2373 -- '',';'"--------------^- -----:7-- T-^-----

AR226-2424 LETART LANDFILL 6ROUNDHATER HONITORINg - SUMMARY Of PC-143* ANALYTICAL RESULTS Sample location Upper Pond Lower Pond Upper Pond Lower Pond Well 1 Well 2A Well 3 Well 3A Wen 4 WeU 5A WeU 5B WeU 8 Upper Pond Lower Pond Upper Pond Lower Pond Well SB Well 5A Well 4 Well 5A Duplicate Upper Pond Lower Pond Well 3 WeU 3A Well 7 Well 1 Well 8 Well 8 Duplicate Well 6 Well 2A Trip Blank Date^Sampled 1/18/91 1/18/91 2/8/91 2/8/91 3/22/91 3/22/91 3/22/91 3/22/91 3/22/91 3/22/91 3/22/91 3/22/91 3/22/91 3/22/91 4/26/91 4/26/91 *11/22/91** 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 11/22/91 FC-143 Result (ug/1) 2,900 1.200 2300 400 60 50 390 380 690 1.6 340 25 500. 340 930 670 380 0.8 830 0.9 790 1,000 1,000 350 O.I 68 280 280 24 63 0,1 * FC-143 Is anrooniua perfluorooGtanoate Ionic surfactant & ** Analyses ptsrforeed bys CHzM mn Quality Analytical Laboratories 2567 Fairlane Avenue Montgomery, AIL 36116 Method Detection UaH O.I ug/1 | Other analyses performed bys Du POnt Experimental Station 141 N Henry Clay Road wnrotngton. 06 19880-0301 Method Detection Unrit 1.0 ug/1 o g 1/31/92 <ji hews 1023 EID1162B4

AR226-2627 15 AR226-2627 RESULTS OF C8 SAHPLES PROM Dg'IH J993 5BOmro QATES SAMPLES ON THE SITE, Sample poinc C8 ia ppb ^fT-^^ -^/-2/ (r3 A B ff6 A B C D ?

PFAS Opinion Letter Zhan Weidong, Quzhou Dongye Chemical Technology Co., Ltd., 13957005831, @126.com Content: Apply for exemption Org. name: Quzhou Dongye Chemical Technology Co., Ltd General Comments: Our company is a trader of fluorine containing fine chemicals, and we would like to express our greeting to the five countries who have proposed the ECHA and PFAS management and control draft.

CAS Number 113507-82-7 120226-60-0 13252-13-6 133201-07-7 151772-58-6 16517-11-6 1691-99-2 1763-23-1 2058-94-8 2355-31-9 24448-09-7 2706-90-3 2706-91-4 27619-97-2 27854-31-5 2991-50-6 307-24-4 307-55-1 31506-32-8 335-67-1 335-76-2 335-77-3 355-46-4 356-02-5 375-22-4 375-73-5 375-85-9 Analysis Name PFAS PES (PFEESA) 10:2 FTS HFPO-DA PFECHS PFECA B Perfluorooctadecanoic acid 2-(N-ethylperfluoro-1octanesulfonamido) ethanol RL ng/g Dry LOQ PTFE MGN7055 OPN. 184839 Lot # G200894AS Units CD127G 129252 17041569C 2053Z 98742 5561530 1.9 ng/g 2.9 ng/g N.D. 1.7 J N.D.

Copies to: Material Tested E.

SECTION IV Attachment Table 1 Tape roughness Ra= 1.5nm Ra= 2.0nm Lubricant Tape surface free energy PFAS -20 % silicones -10 % (Alternative candidate) Alkyl carboxylicReference acids (used for low recording capacity tape) Friction of tape Low (Good) High (Bad) High (Bad) Low (Good) Areal density 26 Gbpsi - (no practical use) - (no practical use) 10 Gbpsi Graph 1 Graph 2

Non-confidential attachment question 8 Figure 1 (cite 3): Crossover leak as a function of humidity cycles during inert RH cycling of Nafion NR-111 (S) and hydrocarbon and partially-fluorinated hydrocarbon membranes.

Ar226- 3295 - 80 AR226- 3298 Dupont-11603 -- `TRADE SECRET Study Title H-24678: Early Life-Stage Toxicity to Rainbow Trout, Oncorhynchus mykiss TEST GUIDELINES: U.S.