Document GzZgJEBLkqpYy7qabGvNbDEzm

3M SpecWty Materials 3M Center St.Paul.MN 55144- 1000 651733 1100 May "30,2000 Dr.CharlesAuer Director Chemical ControlDivision officeofPollutioPnreventionand Toxics United StatesEnvironmentalProtectioAngency 401 M StreetS,outhwest Room 403 EastTower (MailCode 7405) Washington,D.C. 20460 Re: Informationof PerfluorooctanSeulfonates And RelatedCompounds - UEIP Forms Dear Charlie: 3M isenclosingthecompleted"Use and Exposure InformationProfileso"r "LTEIPS" for compounds relatedtoperfluorooctanseulfonatesA.s explainedinmy coverlettetro theMay 18th submittalto EPA, we neededadditionatlimeto clarifiyndustriahlygieneand otherrelease informationto ensurethatthedataintheproflleissaccurateand placedinappropriatecontext. The enclosedinformationcoverscertaincompounds relatetdo perfluorooctanseulfonateas listed inTable I ofthedocument entitled":SulfonatePderfluorochemicalisntheEnvironment: Sources,DispersionF,ateand Effects"a,t12 (March 1.2000). SpecificaltlhyeUEIps provided cover the followingchemicals: *Perfluorooctanesulfonfylluoride *Perfluorooctanesulfonamide *Perfluorooctanseulfonylamido(ethyla)cetate *Perfluorodecanesulfonate *N-ethylperfluorooctanesulfonamide *N-methyl perfluorooctanesulfonamide *N-ethylperfluorooctasnuelfonamidoethanol *N-methylperfluorooctanseulfonamidoethanol *N-ethylperfluorooctanesulfonamidoeatchryyllate *N-ethylperfluorooctanesulfonamidoemtehtyhlacrylate *N-methyl perfluorooctanesulfonamidoetahcyrlylate A LTEIPisnotprovidedforone of thecompounds, ,perfluorohexanesulfonatel,isteidnTable I becauseitisnot an octylsulfonate. Page 2 Dr. CharlesAuer With respectto industriahlygiene information,you should be aware thateach 3M plantthat produces sulfonatedfluorochemicalshas an industria'lhygienisotn staffand issupported by a corporateindustriahlygiene group. 3M's industriahlygiene program focuseson task-based exposure assessment and control.Exposures areidentifieadnd assessedqualitativelaynd/or quantitativelyQ.ualitativaessessmentsareperformed by an industriahlygienist.Quantitative assessmentsincludetask-basedpersonalsampling forcertain,specificfluorochemicalsand/or sourceor area sampling. The resultsofthe assessmentssupportdecisionson exposure control. Engineeringcontrolsarepreferredb,ut personalprotectiveequipment may be used on an interim basisor when effectivengineeringcontrolisnot feasible. In certainsituations3,M has gatheredpersonalindustriahlygienemonitoringdataforthe specific compounds and have includedthatdata inthe profile.In some situationst,hereisno chemicalspecificpersonalindustriahlygienemonitoringdata,but area/sourcemonitoringdataand/or surfacewipe sampling dataforthe specificmaterialmay be availableatthe facilityT.hese area/sourcesample resultsand/orsurfacewipe sample resultsareused totargetareaswith employee exposure potentialaspartof exposure assessmentunder 3M's industriahlygiene program and arenot measurements of actualemployee exposures.Hence, they are not included with thissubmission.In othersituationsn,eitherpersonalsampling datanor area/sourcedatahave been collectedfora specificchemical. The sample resultosf any airmonitoringarecompared to 3M's voluntaryexposure guideline(EG) of 0.1 mg/m3 (milligramsof fluorochemicalper cubicmeter of air)forvariousfluorochemical compounds The EG isan 8-hourtime-weightedaverage(TWA) personalbreathingzone exposure chosen to minimize potentialforuptake. Similartothe industriahlygiene program, each 3M facilittyhatproduces sulfonated fluorochemicalshas one or more environmentalengineerson-siteand isalsosupportedby a corporateand divisionlevelenvirorunentaolrganization.The envirorunentaelngineersassisthe process engineerswith calculationasnd emission estimates.The corporateenvirorunental organizationdevelops methods foranalyzingemissions.In additionto theseresources,several teams were establishedinrecentyearstoidentifyc,haracterizeand reduce specificfluorochemical emissions from the manufacturingsites. While analyticamlethods have improved over time,largevariabilitsytilelxistsforcertain matricesand compounds, so dataavailableforthisreportismostly of a qualitativneature. Although limitedmonitoringdataexistsm,ost emission and waste estimatesarebased upon processmodels and engineeringcalculationsE.ngineeringcalculationsh,owever, have limitations with respectto fluorochemicalsbecause fluorochemicallosseswere not always includedinthe analysisof each intermediatestep. The accuracy ofthe emissionsdatasubmittedvariesdue to severalfactors.Batch process system emissionsare difficulttomeasure due to quicklychanging processconditionsv,entingpressures and difficultiynisolatinpgrocessestotakemeasurements. Additionallyt,he unique characteristiocfs thesecompounds cause them tobehave differentlfyrom conventional compounds, and physicalchemical datapropertiesarenot availableforallintermediatereaction steps. Page 2 Dr.CharlesAuer Pleasedo nothesitatetocontactme at651-733-6374 shouldyou have any questions. Very trulyyours, William A. Weppner, Ph.D. Director Environmental,Health,Safety& RegulatoryAffairs SpecialtyMaterialMarkets Group 3M Center,Building236-IB-10 St.Paul,N4N 55144-1000 Attachrrients