LaSrariyVRi.oZPorbeesli,deMntD MPR 0dMedical Dirctor 3M Medical Deparment S3tM.

3M General Offices Ps ocEanr e s BEHQ_ OT04. 15607 ARR ~ 804 ertified Mail B DEoPcAumEaesntt-PRroocoesmsi6n4g2C8eAntttenr: Section 8(c) OUfSfiEcPeAof Pollution Prevention and Toxics `1W2a0s0hiPnegntnosnylDvCani2a04A6v0e-n0u0e01NW RE: Ei TSCA 8(E) SUB4STANTIAL RISK NOTICE ON: any = 2} sS SANITIZED HA EI as Dear Sirs: `3cMondhuacsterdecweiitvhedapprreoltiemcitniaverymarteesrulitasl.foTrhaefcoourm-phoosuirtiaocnutfeorinthhailsatteisotnssutbusdtyanicneraists attached.

AR226-1892 81 PP EPA -DuPont Telomers Degradation Technical Meeting 9 AM - 4 PM 15 December 2004 Washington, D.

So AR224-1907 Report Title Evaluationofthe Northwest Bioanalytical Method Validation Reports for PFOS and Related Analytes in Human Serum or Plasma in Meeting the Requirementsofthe EDABioanalyticalMethod Validation QAI Report No. 405-503 ------ Data Requirement Full Validation of Bioanalytical Method Author Nancy Benson Philippe Ourisson `QUALITYASSOCIATES, INC. 9017 Red Branch Road, Suite 102 Columbia, MD 21045 { `Sponsor 3M Environmental Laboratories 935 Bush Avenue Bldg 2-3E-09 St Paul, MN 55106 Report Date December 31, 2001 Report Number QAI 405-503 Number of Pages 26 337 !

AR226-2097 Test R,, esul,ts Sample Date Range Concentration Range Action Level Industrial.Hygiene 1/1/97 12(31/97 100% Sample Dt Sample* Duration Type Emptoyee Name BTO; 07 TECHNICAL HOC: 252 BLDQ.3-QEN6RAL 6/25/97 6890 390 A Pers Chemical OWC-143 BTO; 08 TEFLON lOC; MS BLDG. 162 ROOF- GENERAL 7007 7137 362 A 7/EKI7 7138 362 A 7/2107 7139 7C1/97 7219 370 A 371 A 7/21/87 72 368 A 7/2207 7140 370 A 7/22B7 7220 374 A 7/22/97 72% 375 A 7/22S7 7232 384 A 7/2387 7141 7/23B7 7221 386 A <100 A 703(97 7227 374 A 7/23897 7233 331 A 7/24(97 7142 362 A 7/24(97 7222 381 A 7/2497 7228 338 A 7/247 7234 7C5S7 7223 7<2S(97 7229 366 A 354 A 351 A 7/25(97 7235 351 A 7C9S7 7230 8(507 7224 378 .A 378 A ?

AR226-2232 Steven L Grise 12/12/2001 09:43:14 AM To: cc: Subject: Bernard J ReilIy/AE/DuPont@DuPont, Robert F Pinchot/DEV/AE/DiiPont@DuPont, Debbie J Mulrooney/AE/DuPont@DuPont Steven L Grise/AE/DuPont@DuPont C.O.

AR226-2317 ^ Charles J Zarzecki 03/26/2003 11:02 AM To: cc: Subject Ann K Masse/HO/DuPont@DuPont Catherine A Barton/AE/DuPont Washington Works C8 Modeling Report Ann, As we had promised, attached is the modeling report that Debbie Mulrooney wrote for the modeling she did for Washington Works.

AR226-2492 ) MY ^(a"I^ie--S/ 08/31/01 11:01 0:08/13 N0:150 HjynKUCW* ^HWWfUVt Ewr1)^ ya-w-s '-"'" "it'B-;;.,.

AR226-2536 ATTACHMENTI VERIFICATION INVESTIGATION WORKPLAN E.

AR226-2769 FOR DO POHT USE ONLY CopieB to; POLYMER PRODdcTS OEPT.

AR226-2985 ^a^BS^.

AR226-3007 DuPont HLR 696-92 Study Title Subchronic Inhalation Toxicity Study vith|U||^--------in Rats Laboratory Project ID Haskell Laboratory Report No. 696-92 Author Hanan N.

AR226-3043 Study Title Eye Irritation Test with H-21987 in Rabbits Laboratory Project ID Haskel!

HR226 - 3258 440 TRADE SECRET Study Title H-25434: Static, Acute, 48-Hour Screening Test to Daphnia magna Laboratory Project ID: DuPont-11409 AR226 -3258 DuPont11409 AuThoR: Laurie D.

AR226-3337 Migration ofApFQfrQ^ PTF^ It was decided to develop a new method of extraction of APFO from PTFE samples (extraction during 8 h at reQux with 95 % ethanol at pH = 10 on finely ground material) as well as a new method of detection of APPO using capillary gg$ chromatography.