Document Rb0NEen7QbQ4n5xg34wgno0E

. . Sopp 3M KeheE ram. Sail Vice President IM Eronmonal Hath and 900 Bs vou, Safety Operations SP[IOoBeorx 33331 BEHR 04406_00373 BERQ- 20-3 bog, Certified Mail April 14,2006 A#RR222266_-33663357 -E EDoPcAumEeanst--tPRroocoemssi6n4g2C8eAntttenr: Section 8(c) / 1UO2fS0fiE0cPePAeonfnPsoylllvuatniiona Prevention and Avenue NW Toxics EEE waningionosossoooor+ HIAIT MME Tie Bui 41.35.25 g -2 23 ~ Do z 23 @ = 8= Re: TFlSuCorAoc8h(eem)iScuablsst,anDtoicakleRtisNoks.Not8iEceH:Q-S1u1lf8o0n-a3t7e4-;ba8seEdHQa-n0d3C8a1r-b0o3x9yl4i;c-based = 8EHQ-0598-373 - Results from Analysis of Groundwater in the vicinityofformer & Oakdale Disposal Site 3 oon To whom it mayconcern: N38 3M is submitin this nti to supplement is previous submissions on sulfonyl and carboxglle- 12 basedfluorochemicals. 3Mhasrecentlyreceivedtheenclosedanalyticalreport (3M on Environmental Laboratory Report No. 06-0151) for groundwater samples collected in the vicinity ofthe former Oakdale Disposal Site (Site) in Oakdale, MN. - From the late 1940's until 1960, a varietyofindustrial and municipal wastesweredisposedofata property know as the Abresch site in Oakdale, MN. This location is also known as the Oakdale oDuitspyossaelSmitweaasnndtulnededrtwoernaentmoevxeteannsdivceosittearseomlevdieanttiiomnp/acclteeadnupshianll1o9w83g-r8o4u.ndIwna1t9e8r5a,tahpeuSmhpe- `This system has been in continuous operation since installation. M(3uMMoPrhCoaAcs)hbeeamenindclaMeliandantientsghoeatSasittDeu.deyp,TanwriamtnehnaitrnovyfoHlepvaehlmatenhotf(tfMhrDioHsm)at,shseteoMsicmnhenanetrs,aocteaxeiiPszotlitlnhguetnipor-neCseoenntacrenodolfnAagrensctye 2p`T3mroocobnavituitidosoenridsinoigfnfoatrEnhxldeysgpeoeuwnmecplS-ltnosauiudntyetaw lNsdoid.ie tenFwonOecnDglarl DolesImemAodo0l nnu,iistItonFos rrfieigodnuigrmfwo1Rre.fllTseuhoerFopr#ce1hs,euoomoelintfcsctralfhluoesrss.otemd.Rmheossnuimlsttaaosrrpfiyrndweogpmopirctkthoiiwsnigewrtonrercetkuosnase:rde site and fivearein close proximityto the Site. The locationofthese wells is provided on Figure 2, enclosed. Results from the first round of sampling for these wells are contained in the aforementioned 3M Environmental Laboratory Report (No. 06-0151). "The new wells were constructed to sample from four different geological strata: alluvium, Platteville limestone, St. Peter sandstone and the Prairie du Chien group. These are depicted on Figur3eforthe Site. Results for fourofthe five offsite wealreblelsow the limitofquantitation 000001 1 294725 (0.025 ng/mL) for all analytes. (ppb) for each analyte. Levels in the fifth offsite well are significantly less than | ng/mL `While 3M does not believe "substantial isk" reporting tthhartesahnoylod,ftwheesneevdearttahetlaeksesnraelcoongeniozrectuhmeuloantgiovienlgy meet work the by U.S. EPA 1d0ocaksestesassfalusourpopclheemmeincatltoexpproesvuioruespsautbhmwiasyssi.onsT.herefore, we arc placing these results in the (c) I(6f5y1)ou7h7a8v-e51a5n0y. questions, please do not hesitate to contact Gary Hohenstein at Sincerely, Kathrine E. Reed SEtnavfifrVoincmeentParels,idHeenatlth and Safety Operations . Enclosures 000002