interimReport#1 Epidemiology2,20-3W-05 MedicalDepartment 3M Company St.Paul,NIN 55144 Date: June8,2000 TitleD:eterminationofSerum Half-Livesof SeveralFluorochemicals Study StartDate: EstimatedDate of FinalReport: IRB Approval Date: ProtocolNumber # 0007 IRB Approval # 98095 Exempt XX Expedited June,2004 14 October 1998 PrincipalInvestigator: Co-investigators: Jean M.

me 2930524 ReviDsiuopnoNnutm1b4e1r621 TRADE SECRET AR2RG. 3583 Study Title PFO (L1i4n-eDaary/BOrraanlchGeadv)a,gAePSFtOud(yLiinneMara)l,eaRnadtsAPanFdOM(iBcreanched): AUTHOR: Carol Finlay, B.A.

| ARA2R2R6A-636_503644 Attachment A 000003 | SEVERN STL EE, | S3H5oo5n5sm,YeaCr5ro3w0s00s2 Tne8u3s0b3in7c3o6o0m100 Fas: 3034317171 ANALYTICAL REPORT | | PFOA Analysis | Lot#: D6A2I0318 Dale VanDeVelde | pa State RoutGeE8B5l2sDtiucPsontRoad `Washington, WV 26181 | Seven Trent Laboratories,Ino STL Dever | 2 | tidy | Project Manager February 13,2006 EE -- | 000000000033a Table Of Contents Standard Deliverables || Report Contents `Total Number | ofPages | TpShettCaoonvfedrhaiLsarStdtearnDadenadlrdiDhveeleRlrerapaboblslepeoosvckrapgeg: recroenpsiodretrsednctormpallte [] ts al oges ciate in hisToleofCotescre chute + Tableof Contents + Case Narrative Executive Summ--Da eter ctiy on Highlights * Methods Summary + Method/Analyst Summary + Lot Sample Summary + Analytical Results * QC Data Association Summary | + Chain-of-Custody 000004 CasDe6ANZaTr0r31a8tive "MTahneuraels.ulAtslilncrluedesdhuiavltehbites ersenpforotuhnadvteobmeeeent raelvrieeweqdfuoircromeopmlfieaNnEncLetAwCisthatnhdeaLnaybeorxatcoreypQutaalriietonyontesd below

EXHIBIT A p. 2 36qq TM rrv,, .., . ,. " .

p. 1 ~~zzE ~ 3~zZ Off-site Sampling PFOA Concentrations I T- Sample ID Decatur, AL verage PFOA (ppb) Location in Relation to 3M Decatur Facility S il Samples DAL-SB-603R-0-0000 DAL-SB-603R-0-0005 DAL-SB-603R-0-0010 DAL-SB-603R-0-0050 DAL-SB-603R-0-0100 DAL-SB-603R-DB-0100 NR 4 .03 5.06 3.71 1 .275 0.963 Southwest DAL-SB-604R-0-0000 DAL-SB-604R-0-0005 DAL-SB-604R-0-0010 DAL-SB-604R-0-0050 DAL-SB-604R-0-0100 DAL-~SB-605R-0-0000 DAL-SB-605R-DB-0000 DAL-SB-605R-0-0005 DAL-SB-605R-0-0010 DAL-SB-605R-0-0050 DAL-SB-605R-0-0100 DAL-SB-138R-0-0000 DAL-SB-138R-0-0005 DAL-SB-138R-0-0010 DAL-SB-138R-0-0050 DAL-SB-138R-0-0100 DAL-SB-138R-DB-0100 DAL-SB-602R-0-0000 DAL-SB-602R-0-0005 DAL-SB-602R-0-0010 DAL-SB-602R-0-0050 DAL-SB-602R-0-0100 DAL-SB-601 R-0-0000 DAL-SB-601 R-DB-0000 DAL-SB-601 R-0-0005 DAL-SB-601 R-0-0010 DAL-SB-601 R-DB-0010 DAL-SB-601 R-0-0050 DAL-SB-601 R-0-0100 DAL-SB-601 R-DB-0100 2~29 3.75 1 .54 5.615 0.356 7.905 7.795 7.64 2 .985 1 .02 0 .8555 28 .35 53 44 .05 104 311 .5 308 .5 6 .345 6.82 3.635 0.72 0.613 1 .93 2.095 1 .89 NR 1 .905 1 .1575 0.4575 0.442 Groundwater Samples South East Eastern boundary of facility West West DAL-GW-138L-0-060411 DAL-GW-138R-0-060412 DAL-GW-138S-0-060412 0.232 NR NR Eastern boundary of facility DAL-GW-605R-0-060412 0.0881 DAL GW 605L 0 060412 ~ ND I East I 'Average PFOA (ppb) = ng/mL for aqueous samples, nglg for solid samples .

TEE The4ler -- "plied STL : SMueneurrdaa,le prE oomei msaraee oe md FrONPFOSAmin Lox prez soma ------ 0T rAinaoWi Tansmingam a et sop2200 oEp2.sowaontr METHODS SUMMARY DrG270329 | PEE ARJLeYaTInCAL rPeRTEaPoARnATION : Le/us/ns, pron Dex -1c-0012 References: omy OSepveerrantinTgrenPtrocLeadbuorrea.tores, Denver, Facility Standard | DEP2-SDWB-000002 METHOD / ANALYST SUMMARY DrG270329 | mmTLHrOTDICN, mer nave oan -1c-0012 Jaqueline Bonnett 003601 References: ax OSepveerrantinTgrenPtrocLeadbuorrea.tores, Denver, Facility Standard | DEP2-SDWB-000003 SAMPLE SUMMARY 76270329 | MnOa#msapororEs cmLaiEnverseumiesn 333300603 000032 sRovUaNmEDMAELDEE Fpo0z8 ooe ArmkE(d esr).ntse0mgeos rioerpsr mf12lr | TPeo r are tt begppee,s esi por i ty eepeercl, or ne.dn,ktpl,ho, hr.eype, vty, lspe ec t,t i,i,ml,ee, ty, we.

-'R DU FONT USE ONLY AR226-2903 'Copies to E.

Study Sponsor: Issue Date: Document Reference No.: ELFATOCHEM IO-Jul-95 95/SAE6/0548/HT AR226-3022 Ready Biodegradability Author(s): H.

AR226-3030 r 'j CCR PROJECT 509800 GENE MUTATION ASSAY IN CHINESE HAMSTER V79 CELLS IN VITRO (V79/HPRT) WITH REPORT Study Completion Date: October 06,1995 RCC Company"-8'1-'308 Test Report CCR Project 509800 COPY OF GLP CERTIFICATE HESSISCHES MINISTERIUM FOR UMWELT.

AR226-3073 TRADE SECRET DuPontHL- 1W7.00273 Study Title Inhalation Approximate Lethal Concentration (ALC) ofH-22359 in Rats Laboratory Project ID HL-1997-00273 Author John R.

AR226-3188 DuPont-4739 TRADE SECRET Study Title H-24616: Subchronic Toxicity 90-Day Gavage Study in Rats with One-Generation Reproduction Evaluations Volume 5 of 5 Laboratory Project ID: DuPont-4739 TEST GUIDELINES: U.S.

AR226-3211 TRADE SECRET Study Title H-23961: Biopersistence Screening 10-Dose Oral Gavage Study in Rats Supplement No. 1 Laboratory Project ID: DuPont-2923 AUTHOR: Carol Finlay, B.A.

Fr AR226-3267 ~~ `DuPonstodHaEsvkeilrloLnambeonrattaorSyeefnorceHesalth AR226-3267 March 6, 2003 wl) To sxrsufmagrocie nases FROM. 1.C.Muska ANCE STAB : ~~ Medical Resere rec Number: [mm] HHaasskkeellllSRaemfperleencNeumSbteanrdsard Number 22554025 AAnnaallyyttiiccaallRTeepsotrCtodNeo:raber CuHA20y03.032 Notebook References: [mm] FApotertrafccothrvemdedpius1rtphosseaesn.aylytpircoatlocroelposretqfuoiretmheensttsudfyodoesnttisfuibsdtaabnocvees,abTlhiityabnaultymsiasywaalssobe" used .

Mass 328 463 AR226._ 328] -_-- wDuePonnt. 1n2090 TRADE SECRET Study Title H-25767: Static,DAacupthen,i4a8m-aHgonura Screening Test to AUTHOR: Barbra D.

Society of Environmental Toxicology & Chemistry Summary of DuPont Presentations AR226-3343 SETAC Europe 27 April -1 May, 2003 Hamburg, Germany Biotransformation of the fluorotelomer 8-2 Telomer B Alcohol (8-2 TBA) in bacterial culture WangN.'.