Document ga6k4148GM26xZw9xdkj3OLN

RRoog~aacc,kkii, LLaarrrr~y FsrFoornotmm::: TocSTooe!::nt: SSCuucb:bjjeecctt:: BBTaualeloosggdhha,,y,SSttAeepvveer 27, 20101000 A Tuesday, April PRoolgae,ckB.bLary Rogacki, Larry 27, 20"10 10:00 AM Estimated Polta, Bob Estimated PPFFOOSS llooaaddss iin MMeettrroo eeffffluueenntt aanndd tthhee MMiissssiissssiipppii RRiivveerr LL1 aairrrnryyk,, the best estimate we have forthe Melo lant contriouon to PFOS evel n the ver i basicly as we discussed epet aatsrhrliilinieeekrr.,athbbmeuuttobfitehhisertrteeeosiistsimissuuaebbtsesslttwnamineaittiahaelaldvuuenanctcefoe-5trr6atatiig~indnet.tyyM..heBBetraaossloeePaddldaoonGnntocwMMonPPnsCtCtrAiiAb'eu'ssatimoPPnoooofotlolM22PossFlaaOmm8ipspilleeinnsvggteiloosmnnaitn77eft1d2h2ate220r02i0v029e93,r thgishdeeb.aPPssFFiicOOganSSlalyillonaogaasddawniinenittdhnhieseccriruivevseeasrrseodef u11upp66s7s7itrggretdedaammddiuodefofutMwoonMeMsterieeoirtrreiosameiinnspiptuniutmc.tr.ae((taOeOstdethh.ae)ertrA5ss6noouugirr/ncdcde;eesstph(e(einePd.loiePangditgssdeoEsEwyyteneisLmLtaraeekkeaoe,mf, NNhooeofrrtMtMhheeSStiratooarriisnSSptetueestlet,ilfm, aaetltthcec.d))mrmaiatvaye2y2bcc3aosogneftdnrdi,btosunietgenNfiatooelintthhgoeeeafniiennctrease of `isunsapam2sm0tprp0elii7annmgg(n/yyd=ie2oek)wldianssnsaadtremmRaaa&mssDssinsllocoaarameddpaiiisnneMMg.)ieftAtrrrnoomoein1ffdf1lfue/epe2en0nnt0d3oofef(n55vt=56"egg)s)tdtdimO((uanussteeiinneoggefffetffhffleeluuteMennsettatrccmooopnnilcnceepenuftnttrtarotaotmititoo7hn1ne2dcr0il0aavre9aars((bh93ao00swennedggdfoL)an) PfrMroEoemGmtrSoMMcePPofCfCnlucAAeennsSitaarmmaptplilioinnnggof 2h2in55e2000Mnn0eg7tfLrL(o;n=bPbl2aaa)ssneeatddnsdooennRfftt&huhDeiissnstccaoolmnnocacpedelninntotgrfraaPfltriiFooomOnn,St1thph1ere1Mo2Mbe0a0teb9rtlrooy(nPlP=lellaas)nn)nt.t eeOtffhnffleleuuereenanftntflguPFeeFOn5Ot0SSs.a2ll0moo0aapddgleiwwdoforuourlmleddpr7bbe/ees2e011n055t922insggghf/d.ao.pwSpSer0odo1xIaitthmPiainFikkeOlitStysis1co0afan0ic-rrte4toon0t0rsSa%aatyyiottnhhaaottf the Metro Plant's effluent load of PFOS Sitnecvreeasiens theriverload. Cleaarloyt increases in the river load. Clearly a lot of uncertainty probably lies of uncertainty hae, in the here, bo in the Melo range 50-200 gtd, both in the Metro contribution and n re ver load representing approximately 100-400% contribution and in t~e river load. Steve `SPSrttienovcveienpnelJJ..RBBeaaslleooaggrhhc,, hPP.ShOc.Di..ntst 2`MPM4reei0nttr0croioppCpaoholliiitdRaasnensRCCeooaoaurudcnnhccliSl cEEinenvnviitrrisootnnmmeennttaall SSeerrvviicceess 62SS45tt.01PP06aau0Clu2,lh, i8lMMd3sNN67R55op55ah11do00n66e 66655511110t666h000I222nt888e223r1m16a557tipffoaohnxxoalneConference on Mercury as a Giokal Polktant "- - PHH1l0aaetllhiafalsIxen,,tveiNNsrnoiotavvtaaihoiSSntccapool/tt/Ci,amo,enrGCfceaaunrnnea2and0dca1ae;1; oJJonuurllyMya/22em44rec--ur22c~99u,,ans222000a11111GlWobeallcPoomlleuthaintm - Please visit: _http:/tmercury2011 ~0r,q/mercury2011./Welcome.html Mississippi River EMsitsismisastipedpiPRRivOeSr dcdoiisnscchceahnratgraetgaaoettnSS,t.t.MiPPsasauiulsl,,si77p1tp22i/122R00i0v09e9r ai St. Paul Estimated PMFaOssS lconocoefnPatRraOtdiSon,, MMisisssisisssiippppii RRiivevar aet SrStt.. PPaauull Mass load of PFOS, Mississippi River at St. Paul PlEEassnttitimmaatteedd PPRFOOSS ccoonncceennltrraaitioonn,, MMiissssiissssiipppii RRiivveerr ddoowannssttrreeaamm ooff MMeettrroo Plant MMMoaassssss lloooaaaddd ooifnf cPPrFFeOaOsSSe,, iMMnifissiivsesirss,sipiopsppl:irRReiiavvmeeirrdddoowownnwssintrressaamtroroofffeMMMeeaetttrrmrooo Plant Plant MPaansts load increase in river, upstreamldownstream of Metro Plant 0911211500 ngccffss 5%2.5 56 ganglL gld 2211300 9nn1gdglL 223 gtd 116677 gg/ad MEMesetitrrmooatPPealadnntPt dFdiiOssccShhaacrroggneec,,en77a/22l12i2o00n00,09 Metro Plant effuent Estimated PMFOSalcooands coefnPtrFasOtiSon,, MMetertroo PPilanntt effluent Mass load of PFOS, Metro Plant Estimated Estimated PPMFFaOOssSS lccoooanndcceoenfinrPtraRatOtiioSonn,,, MMMeetetrtrrooo PPPlalaannnttt effuent effluent Mass load of PFOS, Metro Plant 16085 GD 160.95 9 ngl 90 5 9 55 MGD ngfL gtd 221550O2 ngnggufLL 152 gfd (nalline DL MPCA Pool 2 (half the DL, MPCA Poo~ 2. bbaasseedd oonn MMPPCCAA ddaattaa ffroomm b7baa2ss0ee0dd9oonn ssiinnggllee MMOCEESS ddaatt~e 7t2009 : 22668866..00000011 Exhibit 2686 MET 0007023 MET 0007023