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CONFIDENTIAL AR226-3110 DPT478/992105 This report is ecmsiderea^!

CorporatHeealthPhysics 3M Center2,20-2E-02 CorporatOeccupationMaeldicine PO Box 33220 CorporatPeroductResponsibility St.PaulM,N 55133-3220 CorporatTeoxicology 6517331110 3M MedicalDepartment DeterminatioofnSerumFluorochemicLaelvelisnSumitomo3M Employees Ninety-fouSrumitomo3M employeesparticipaitneadvoluntarcyr,oss-sectiosnearlum fluorochemicalassessment.Three groups of employees were examined.

BOD/COD resultstorFC-99 (DEA saltotPFOS) BIODEGRADATION TEST SUBSTANCE Identity:PerfluorooctanesulfonatDeE,A salt;may alsobe referredto as PFOS DEA salt,FC-99, or 3M Sample No. 2. (1-Octanesulfonic acid,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafcloumoprdo.-, with2,2'-iminobis[ethan(o1l:]1)C.AS # 70225-14-8) Remarks: Testsample isa mixtureofthe testsubstanceinwater (approximately25% testsubstance and 75% water).Allvaluesreported relatetothismixture.No calculationwsere made to adjustforthe actual concentrationofthe testsubstance inthetestsample.

TOXICITY TO AQUATIC PLANTS TEST SUBSTANCE Identity:N-ethylperfluorooctanseulfonamidoethanolm;ay alsobe referredto as N-ETFOSE Alcoholor FM-3422. (1-Octanesulfonamide,N-ethyl1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-N-(2-hydroxyethyl@, CAS # 1691-99-2) Remarks: Materialisan off-whitew,axy solidofuncharacterizedpurity:The limitedwater solubiliotfythismaterialprohibiteda definitive determinationofthe aquatictoxicity.

HAZLR;'CON LABC)RATC)Rlr=S ARAF-RICA.

CorporatOeccupationMaeldicine 3M CenterB,uildin2g20-3W-05 St.PaulM,N 55144-1000 65''Lt34,230Telephone 6517339066Fax 1.HealthStatusofPlantWorkers ExposedtoFluorochemical-sa Preliminary Report Thispublishepdaperby Ube]etal(Am IndHyg AssocJ 1980;41:384-38p9r)ovideasn overview of fluorochemicalindustriahlygiene,medicalsurveillancaend epidemiology researchdata collectedinthe late1970'satthe Chemolite (CottageGrove, Nlinnesota) facilityT.he authorsconcludedthattotalorganicfluorinewas found intheblood of workers exposed to industriaflluorochemicals.Medical examinationof exposed workers and a briefsummary ofthe initiarletrospectiveepidemiologicmortalitystudy(seestudy # 2) ofthe plantemployees indicatedthattherewere no illhealtheffectsattributablteo fluorochemicalexposure.

ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity:Perfluorooctanoiaccid,ammonium salt;may alsobe referredto as PFOA ammonium salt,Ammonium perfluorooctanoateP,FO, FC116,FC-1 26,FC-1 69,or FC-143.

BIODEGRADATION (BOD/COD) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredto as PFOS, FC-95, oras a component ofFC-206 or L3243. (1-Octanesulfonaicid)(CAS # 2795-39-3).

ACUTE TOXICITY TO FISH (BLUEGILL SUNFISH) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonawthei,ch may alsobe referredtoas PFOS, FC-95, oras a component ofFC-206 or L3243. (1-Octanesulfonaiccid)(CAS #2795-39-3).