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EPL EXPERIMENTAL PATHOLOGY LABORATORIES, INC. 5A6 _ X7A3 Report Title PATHOLOGY PEER REVIEW AND PATHOLOGY WORKING GROUP REVIEW OF MAMMARY GLANDS FROM A CHRONIC FEEDING STUDY' IN RATS WITH PFOA PWG REPORT Data Requirement N/A Author Jerry F.

P-1 Sanitized Version for the AR-226 Public Printed Copy File fCBI removed: copy restricted materials included as read only) Index DOCUMENT DESCRIPTION NO.

FINAL STUDY TITLE Ammonium Perfluorooctanoate: Phase II.

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SEVERN TRENT LABORATORIES ANALYTICAL REPORT JOB NUMBER: 244434 Prepared For: Weston Solutions, Inc. 1400 Weston Way Building 5-2 West Chester, PA 19380-1499 Project: Confidential Decatur - FC Investigation Attention: Jai Kesari Date: 03/06/2006 Signature Name: Richard C.

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43 Environmental Laboratory 26H8 - 0500 - 373 3M EEnnvviirroonnmmeennttaall LaLabboorraattoor:y ARD26-0945 & Z Nos FFiinnaall RReeppoorrtt-- AAnnaalylyttiiccaall SSttuuddyy EG Single-dose Intravenous Pharmacokinetic Study ofT6246 in Rabbits Single-dose Intravenous Pharmacokinetic Study ofT-6246 in Rabbits IInn--VViivvoo SSttuuddyy RReeffeerreennccee Number: Number: HWI#6329-159 HWI#6329-159 SSttuuddyy NNuummbbeerr:: AMDT-042095.1 AMDT-042095.1 TTeesstt SSuubbssttaannccee:: FC-95 (T-6246) FC-95 ('I?

B AttachmenPtesrtfoluLoertotcetratnoe CS.ulAfuoneartedaStteuddiMesay 4,2000 -O; A X3 R226 = 53 Submitted under Claim of Confidentiality Sulu aaaspurl The following study includes data on PFOS and on other chemicals that are confidential research & development materials. 1-309); Analytical Report re same `Exploratory 28-day Oral Toxicity Study with Telomer Alsohol, Telomer Acrylate, PFBS, PFHS and PFOS (positive control) by Daily Gavage in the Rat Followed by a 14/28-day Recovery Period, NOTOX Project 24933, 3M Test No.

: AR226 _ 1161 cmomgmise SEE, Rl1oo9st)ei5A5ro.7.nB00uc3o0mrr TAFT, STETTINIUS & HOLLISTER LLP 1800 FIRSTAR TOWER 425 WALNUT STREET CINCINNATI, OHIO 45202-3957 FA3X135.318313.8210002808 oonato am April 12,2002 comme ii iesn in n co5 ms soS uoco erce eCor - CERMATLLNI O. 7F 0001I 6700E009D 4961 7412 RETURN RECEIPT REQUESTED IRIS Submission Desk clo ASRC 6Gr3e0e1nbIevlyt,LaMneD, S2u0i7te70300 < on z= 3S3R =E B2a9 = 5 Re: IRIS Submission Inventory for Perfluorooctanoic A-cAmi mond ium Salt IRIS Submission Desk: EnvironOmnenJtaanluParroyte9,ct2i0o0n2A,agennoctyicweaasppseolairceidtiinng tahdediFteidonearlalinRfeogrimsatteirotnhawtitthhereUsnpietcetdtoStaatnes euxppcoosmuiren,gi[nRaIdSdietviaolnutaoticohnrooftnihceexrepfoesruernec.e"d Aclhtehmiocuaglh "UfSorEePffAecrtesqfuersotmedaciuntiteiaalnsdusbumbicshsrioonnic niontviecnetotrhyati"ntfhoermpautbiloinc mbyayMasrucbhmi1t1,in2f0o0r2m,atUiSonEoPnAasntyatcehdeimnictaslJsaunbusatraync9,e2a0t0a2n,yFteidmeer.a"l(R6e7giFsetde.r Reg. 1214 (Jan. 9, 2002).)

(cass on XW/T) STTI Z0/20E0 AR 286 -- 1172 ENVIRONMENUTNIATLEPDRSOTTAETCETSION AGENCY 1650RAERGCIHONSTlitREET PHILADELPHIA, PA 19103 77 WEST REGION JACKSON V BOULEVARD CHICAGO, IL 60604.

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LABORATORY-SCALE THERMAL DEGRADATION OF PERFLUOROOCTANYL SULFONATE AND RELATED SUBSTANCES TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or C8F17SO3-K+. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, potassium salt, CAS # 2795-39-3).