Document 3E4EeY0xGg40wzNarLqrBLx

PffYSICAL - CIffEIN/fICALPROPERTT-ES A Robust Summary, FinalReport, and Protocol on the physical-cbemicaplropertiesof perfluorooctanesulfonataere includedfor each of the followingparameters: PAR-KWTER DATE OF REPORT RESULTS ;MeltingPoint/MeltingPointRange Vapor Pressure n-Octanol/Water PartitionCoefficient Air-Water PartitionCoefficient Solubilitiyn ppre water SolubilityMeasurements on FC-95 2/24/99 5/5/99 2/11/00 3119/00 5/3/99 2/6/81 4000C 3.31x 104p (4@200C Not calculablet;hr" 0(<2xlO-) 570mg/l 1080mg/l phases The data presentedinthe study "SolubilitMyeasurements on FC-95," was determined by indirectmeasurement, not by actualanalysis.Therefore,the data isnot reliable. Please note thatthe March 1,2000 submittalto EPA entitled"Sulfonated Perfluorochemicalsin theEnvironment Sources,Dispersion,Fate and Effetts"included solubilitdyata on water otherthan pure freshwater, rdteredseawater-,unf-iletred sea water).These data were developed,however, in support ofotherstudiesand not produced. using GLP Standards.For thisreason,Robust Summaries, FinalReports,or protocolsfor thisspeciricdata are not beingprovided. EINVI]RONW,NTAL FA rE A @D TRANSPORT This sectionpresentsinformationand testresultsfrom abiotica,nd bioticdegradation and soiladsorption studies.Degradation studiesincjudehydrolysisp,hotalysisa,nd biodegradation.Much of thiswork isinprogi@sresswith finalreportsscheduled for the June to August, 2000 timeframe. As these studiesprogress,there are certainkey findingsthatcan be presented as preliminaryresults: 1.There has been no indicationthatperfluorooctanesulfonatuendergoes any degradation from hydrolysisp,hotolysis,or biodegradationmechanisms. 2.In aU hydrolysisand photolysisstudies,perfluorooctanesulfunatheas not been detectedas a degradationproduct in any conclusiveexperimeul This preliminary finding callsintoquesl,.-:t.hoenassumption of expected de,-Mdationof other fluorochemi.c-atlos_perfluoroctanesulfonate. 3. In the studiesfocused on hydrolysisof fluorochemicalpolymers that form the structureof the specificindustrialand consumer products,ithas been determined thatthesematerialsare relativelsytablein the environmenl For example, the foflowinghalf-liveasre estimatedforvarious polymers: PgLYiMER E[A.LF-LEFE Acrylateand ester 1-5 years Polyethyleneclycolbased 3-50 years Urethane >500 years For hydrolysisto occur,polymers must be subjectedto an aqueous environment, which isnot expectedto occur in a municipal or industrialandfill. 4.Relativefo photolysist,he current data sugcestsa hypothesisthatthesematerialt willphotolyzeto carboxylatestructures.Thesec'structureshave much different propertiesthen sulfonatesin thatthey are much lessbioaccumulativein ecological species. Additional discussionof theseresultsand ongoing studieswillbe presentedin subsequefa" submissions and reports. ECOTOXIC= ELEINM.NTS This sectionpresentsinformationand testresultsfrom a seriesofecotoxicitsytudiesan perfluorooetanesulfonatense. informationispresentedasRobust Summaries, Final Report and Protocolforeach ecotoxir-ietlyemenl The studiesperformed during 1999 and inearly2000 were carriedout usingGLP Standards.In contraste,catoxicitsytudiesperformed duringtheperiod1974 to 1998 were conducted usingprotocolsand analyticamlethodologiesavailableatthetime ofthestudy. In addition,in theseoldertestst,he sulfanatedperfluorochemicaplroductswere variable mixturesand containedmore impuritiesS.everaltestswere hampered by theinsolubilitoyf theperfluorochemicaland resultsare expressedas"greaterthan" themeasured solubility. Therefore,the data presentedinthesehistoricarleportsmay notbe reliable. EiNVMONiMENTAL MONITORING: PART ONE - NfULTl-CFIFY STUDY The multi-citsytudy was designedto obtainpreliminarydata about dispersionof fluorochemicalsin the environment,uptake intofoodsand presencein drinking water to understand the potentialsources of human and environmental exposures thatmight resultfrom thistype of dispersion.The multi-citsytudy paired a city having manufacturing or commercial use of fluorochemicalproductsbased on customer saleswith a citythatdoes not. Initiallsyixcities(,threepairs)are being examined. The study may be expanded depending on furtherresults. The multi-citystudywW yieldenvironmental distributiodnata as wellas data on potentialsourcesof human exposure. The citieswere selectedto representurban locationswith variouslevelsoffluorochemicalreleasesand varioustypes of municipal water supplies.The samples to be obtained,where possible,include: urban air,surf@cewater column and surfacemicrolayer,sediment,riverrisl@., drinking water intake@treateddrinking water, tap water,the influentto and effluentfrom publicly-ownedwaste treatment works, sludge,and municipal landfill leachate-Additionallya, "market basket" of severalfood productswillbe sampled. These include: beef,pork, chicken,hot dogs, catfish,egl.,mcisl,k,bread, green beans@ applesfrom grocery storesand, ifpossible,produce from localfarmers' markets. The attachedmaterialdata provides more detailon the designand structureof thestudy and representsthe firstresultsfrom the multi-citsytudy. Included are reportson the qualityassurance plan and riejdsamplinc,procedures used and the resultsof the drinkingwater samples taken from the sixcitiesT.he resultsindicate thatdrinkingwater infour citie(sDecatur,Alabama; Cleveland,Tennessee; Mobile, Alabama; and Port St.Lucie,Florida)did not containdetectablelevelsof tluorochemicals.Only two citie(sColumbus, Georgia,and Pensacola,Florida) containeddetectablelevelsof sulfonatedfluorochemicalsin the drinkingwater. The resultsshow thatthe levelsare in the range of 40-60 partsper trillioonf perfluoroctanesulfonate.Only one city,Columbus, Georgia,showed very low detectablelevelsofperfluorooctanoate. .kho includedisa copy of a draft"lifetime"drinkingwater healthadvisory developed forPFOS. This advisoryreflectsa very conservativeapproach based on applicationof "safetyfactors."The advisorylevelof 1 part per billiosnhould not be misconstrued as thresholdfor danger or concem, but only a referencepoint based on applicationof conservativemethods and the informationavailableto datp- A comparison ofthe drinkingwater data from the multi-citsytudy indicatesthat there are two orders or magnitude of safetybetween the draftdrinkingwater advisory and theresultsfrom thesetwo citieisn the multi-citsytudy. E',N-MONTYIE.NTAL MO@'i-ffORLNG.: PART TWO - BIOSPHERE SAMTLING AND A.N.A-LYSIS A plan to assesspotentialenvironmental exposure to perflucrooctanesulfonataend other nuorochemical substanceshas been developed by 3M and outsideexperts.One component of thisplan involvescharacterizatioonf the geographic distributioonffluorochemicalsin bioticand abioticreceptors.Two studiesare in progress,one focusedin thevicinityof the 3M Decatur, Alabama manufacturing facilitya,nd the othera much more comprehensive globalbiospheremonitoring program. The preliminary resultsobtainedto date have been reportedin the 3M Environmental White Paper entitle"dSulfonatedPerfluorochemicalsin the Environment: Sources,Dispersion,Fate and Effects." The study in theDecatur,Alabama area isbeing designed tounderstand the impact, ifany, of production operationsin the localenvironment- Samples of thegroundwater, surface water, sediments and fishand bird specieswillb.e col!ectedin May and June@ 2000 for analyses.This data willbe used to evaluatethe environmental presenceoffluorochemicals and to assessthepotentialof any effectsusing ecotoxicologicatlestresults. The Biosphere monitoring program was designed in consultationwith Dr. John Geisy of Michi'-anStateUniversity.This plan isbeing viewed as an iterativperocessto assessglobal distributionoffluorocbemir-alAss. resultsare obtained from the globalenvironment, the plan isto concentrateon those areas where fluorochemicalsare detectedin samples and focus on additionalsampling and analysesin those sp'ecifilcocations. InitiaBy,samples of tissuesand blood plasma are being collectedfrom archivedspedmens coveringdifferentspeciesand locationsA.reas offocusincludeNorth America (Great Lakes and coastalmarine locations)t,he arcticregion,and Europe- Speciesto be studied includelake trout,w2lleye,salmon, catfish,and brown trout;cormorants,eaolesand albatross;musselsand shellfishm;arine mammals; and otherspeciesT.his sampling plan is in progressand as data isobtained and reportsgenerated,additionalsubmissionswillbe made to EPA. Included in thissectionare.the followingdocuments: 1. LCiviS.,MSAnalysisof Extractsreportedin:"PreliminaryReport Analysis of PerfluorinatedCompounds in Environmental Samples" by.P.Jones and K Kannan - 4/7/99 2. FinalLaboratory 3M Reports on Analysisof Fluorocbemicalsin Wild Bird Livers- 4/28199 3. Screening of PFOS levelsin Eagle and Albatross- 5)18198