Interoffice Correspondence H.E.

CCHHEEMMIICCCAAHLLENRROEELSSIOOTUUERRCCEEPSSLANDDTIIVVIISSIIOONN CHEMOLITE PLANT OOppeerraattiinngg SSttaannddaarrdd DDSaautteeperoosffedIIissnssuugee::: AAApuurggiuulsstt2,1144,,197113997733 Superseding : April 2, 1973 coDE wo: CODE NO: F-3256 FM-3256 Perfluorooctanotc Actd Distillation Perfluorooctanolc Acid Distillation MMFGG FFORR:: FRM-331775,, FRMN--33339955 RREAESONAFFOORSRCCHOHAANNGNGEE:: 21I...

lo BIOSEARCH, INC. p.c. box 8598 philadelphia, pennsylvania 19101 telephone: (215) 848-4499 Submitted to: 33HM CCeonmtpearny sSts.iolpaul, Minnesota Haterial: 3M Conpany - T-1395 Sample Received: December 6, 1975 Date of Report: Test: Object of Test: Method of Test: Results: March 4, 1976 Primary Eye Irritation Study - Rabbits wThoicdhetetrheminseubjtehcetdmeagtreereiaolf miaryritpartoidounc,e wIhfenany, Tihnisstiltelsetd wianstopetrheforemyeeds oifn aorldbeirnotorabcbliatsss.ify StuhibsstamnacteesriaLlabeulnidnegr Atchte.

BACK TO MAIN ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE Identity: Potassium Decafluoro(pentafluoroethyl)cyclohexanesulfonate may also be referred to as FC-98.

M AS.6 - 0788 ACUTE TOXICITY TO AQUATIC INVERTEBRATES (SCUD) T EST SUBSTANCE___________________________________________ __ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-206 or L3243. (1-Octanesulfonic acid) (CAS # 2795-39-3).

ACUTE TOXICITY TO AQUATIC INVERTEBRATES TEST SUBQ@TANCE (DAPHNIA MAGNA) Identity: A mixture containingperfluorooctanesulfonate,which may also be referredtoas PFOS, FC-95, or as a component ofFC-206 or L3243. (1-Octanesulfoniacid)(CAS # 2795-39-3).

B10 -TEST 1810 FRONTAGE ROAD NORTHBROOK, TLLINOIS 60062 REPORT TO REVERSE IN FIVE ONE 3M COMPANY MUTATION STUDIES WITH T-1485 SALMONELLA STRAINS AND SACCHAROMYCES STRAIN P.O.

e- ` ARNE-0ll6 ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE Identity: Perfluorooctanesulfonate, DEA salt; may also be referred to as PFOS DEA salt, FC-99, or 3 Sample No. 2. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7.7.8,8 8-heptadecafluoro-, compd. with 2,2-iminobis[ethanol] (1:1), CAS # 70225-14-8) R(aepmparrokxism:atTeelsyt 2s5am%plteestissaubmsitxatnucree aofndth7e5te%stwastuebrs)t.anAclevianlwuaetserreported relate to this mixture.

L P h o n e : (814) 231-8032 BACK TO MAIN Fax: (814) 231-1253 or (814) 231-1580 Analytical Report Fluorochemical Characterization of Sediment, POTW Sludge, and Landfill Leachate Samples Decatur, AL (W1979) Centre Analytical Laboratory Report No. 023-014R (Revision 1) Revision Date 3/28/01 Testing Laboratory Centre Analytical Laboratory, Inc. 3048 Research Drive State College, PA 168011 3M Environmental Laboratory Contact Kent R.

R K i-O II ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity: Perfluorooctanesulfonate, Ammonium salt; may also be referred to as PFOS NH4+ salt or FC-93. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, ammonium salt, CAS #29081-56-9) Remarks: Test sample was taken from 3M production lot #1.

Covance Studies The attached report summarizes the results from the assessment of mitochondrial bioenergetics of hepatic mitochondria isolated from rats treated for 3 weeks with one of 4 doses (plus control) of dietary FC10.

M 6_ 0737 MICROBIAL INHIBITION (DEHYDROGENASE ACTIVITY) TEST SUBSTANCE__________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-206A. (1Octanesulfonic acid) (CAS # 2795-39-3).

AR226-2840 BIOASSAY REPORT SUBMITTED TO E.

BIOACCUMULATION TEST SUBSTANCE Identity:[2-(N-Ethylperfluorooctanesulfonamiedtoh)ylacrylate;may also be referredtoas Bl 228, D-1, ETFOSEA, or FX-13.(2-Propenoicacid,2[ethyl[heptadecafluorooctyl)sulfonyl]aminoe]settehry,ClAS # 423-825) Remarks:Materiiaslan ambersolidR.eportstatetshatsamplepuritiys99% or more based on informatiosnuppliedby Sponsor.

CorporatOeccupationMaeldicine 3M CenterB,uildin2g20-3W-05 St.PaulM,N 55144-1000 6517374230Telephone 6517339066Fax 9.PhysiciaPnlantSummary ReportsRegardingMedicalSurveillanPcreogram atCottageGrove (1978-1991) Followinrgeportosfthefindinogforganifcluorinienserasamplesa,fluorochemical medical surveillancperogram began at3M's manufacturingfacilitiiensthemid 1970's.