Document nk4mvQbgz409wypvY9G7pZega

. SKaaltthrViiosP!Er.eRseesndt, Ph.D. S3aMteErmiOpreornamteinotnsal Heath and 97SU000PBBoauxsh3M3A3Nv3n1Suse, Building 4225.26 aan . 3M...Mail RECEIVED 0PPT chic AIN21 Aig 3 N FEH P- 060500373 #3262737 2 = on Fon June 14,2005 Beg -po-31D Tor Document Processing Center EPA East - Room 6428 Attn: Section 8() UOSfSf.icEenovfirPoolnlmuetnitoanlPPrreovteencttiioonnaAngdeTnocxyics 1200 Pensylvania Avenue, NW. Washington, D.C. 20460-0001 NocBl @ @ CoNTaly NG sg Re: TSCA Section 8(e) Supplemental Notice: Sulfonate-based and Carboxylic-based Fluorochemicals, Docket Nos. SEHQ-1180-374; SEHQ-0381-0394; SEHOQ-0598-373 Dear Sirs: 3M is submitting this letter to supplement its previous submissions on sulfonyl and carboxylic- based water fluorochemicals samples. and specifically its February 9, 2005 submission with analytical data for 3M has recently received summariesofanalytical data from the State of Minnesota Department of Health (MDH) for water samples taken from private wellsinthecommunities ofOakdale and Lake Elmo, Minnesota. The sampling and analysis ofthese wells was performed by the Minnesota this letter; Departmentof Health however, it is our unde (MDH). rstandin 3M i g that s providing abriefsummary the actual laboratory reports ofthe would information be available i n from MDH upon request. Each sample was analyzed for perfluorooctane sulfonate (PFOS) (CyF7SOsH) and perfluorooctanoic acid (PFOA) (C;F1sCOOH). The MDH Environmental Laboratory lists "Report Levels" in their reports to describe the analytical sensitivity ofthe test method employed. For the work addressed by this submittal, the "Report Levels" were 0.5 and 1.0 parts per billion (ppb) for PFOS and PFOA, respectively. PFOS was not detected in anyofthe seven Oakdale samples. PFOA was detected in one Oakdale sample but at aconcentration below the "Report Level" of1 ppb. Ofthe 141 Lake Elmo locations sampled in 2005, 114 were repoarst"neodn detects" or previously referenced "Report Levels". There were 15 locations where had results below the results were above "Report Levels" but below health-based criteria and 12 samples with results at or just above State of Minnesota health-based criteria. As 3M understands the situation, MDH, in conjunction A MATTE WEB | me# 337306 `twhietshetwheellMsinannedsohtaasPsoulplpultiieodnbCototnlterdolwaAtgeernciny,thiesmaerarnatnigmien.g for installationof carbon treatment on pAusrpdoissceusossfetdhien foeudrerFaelbrSuafaeryDr9,in2k0i0n5g sWuabtmeirssAicotn,,4M2DUH.S,.Ct.hepr3i0m0afreytagseeqn,cyhains Meistnanbelsioshteadfor Hwehaelrtehb-oBtahsePdFVOaSluaensd(PHFBOVA)oafre1prpepsebnta,ndM7DpHpbalfsoorhPaFsOrSeceanntdlyPbFeOgAunreaspppelcytiivneglya.n aIdnditthievecase meaocdhelsutbhsattagnecneetroatietss HaBHVa.zarUdsiInngdetxhi(sHaIp)pbroyaacdh,diMngDtHogectohnesridtehresraatnioHsIofofth1eacsoanncaelnotrgaotuisontootfhe HBV for an individual substance. In communicating these water data to the public, MDH has explained that HBV represent levels ce10oxnpasociscduoerurenetdmfasoayrfeohtafhvoeerreoexcxpcpouosrsururerede,saebavonevdneaohdvedaieltratiohnl-iabflaestseiadmfeec.tr"yitefArasicat,toorgsti,hvteeinLsathbkaeetliEseulvcmehodctdrhaiatttae,raineavaiendncelqwuuhdaeetreaefactor `marginofsafety exists.' dIantvaibeawseof--th3eMMDdoHe'ssnoctombemluineivceatthiatonth-eswehdiactha imseseutptphoertTeSdCbAy oSuerctoiwonn8r(eev)i"eswuobfsttahnetiealxtreinsski"ve riemppoorrttianngctehrteosthohled.ongNoeivnegrtwhoelrekssb,yU3.MS.haEsPdAectiodeasdsteossrefplourotrtohcihseimnifcoarlmaetxipoons,urreecpoagtnihzwianygsiatsnd potential risks. If you 6374, have any questions, please do not hesitate to contact Michael A. Santoro at (651) 733- Sinceoe rely, TE Fathiine fol. Katherine D. Reed, PhD Staff Vice President Environmental Technology and Safety Services posse ' MDH "Model for Assessing Heal RisksofChemical Mixtures", availabe at worhealthsat mms, * MwwDwHhEenavltihrosntamteenmtanluHs.eal Information Perfluorochemicals and Healt, available at * MwiDvH.h"eLaalkhestEaltmeomGnro.undwater Investigation Overview" (Apr. 26, 2005), available at.