Document XN87KoBnJz6EBvj5Ymx6E2nB
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RECEIVED
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FFEEBB 11882Z000053 "
_ memoRaNoUM EENNVVIIRROONNMMEENNTTAALL RREESSOOUURRCCEE GGRROOUUPP ee " " .MEMORANDUM
MMPPCCAA,, MMAAPR. DDiivviissiiooan Strhmdboion
DDaavvee DDouoglasuaanndgdMMalairkkRaRyysss `Minnesota Potion Corio Agency COMPANY:
Minnesota Pollution Control Agency
"FRDOMa: nComeauand Pout Bock DanComeau and Paul Book
. .
_DATEFF: eebrubaryv13a, 2y003wsoes 00 CC
RE_"
33MMCCotoittaaggeeGGrorovvee;;
AArreeaa
0D1I
nial initial
Groundwater
Groundwater
Samping Rests
Sampling.Reselts
N OT ESICOMM E kl]~:
.
EMEWnn-cc1loo0ss2ce)dd-wiaahrreiechtthheow.erllaeab.boortraueitcooerrnyylyaanniaanblsyyiftaicclaaelld rraeetssuutllhtess fDfrToommarnnoeaewwofmmoSonMnititooCroriitnniggagwweeelGlllrssov((eM.MWW-1T100h11e awaennlddl.
lMoWca-t1i0on2s)..r.wehlicaht1wi0evDre1e aoshownon Figur recently installed at the D1 area of 3M Cottage Grove. The well
I.qcations relative to D1 are shownon Figure t.
DS`TDeSoaecaqmcmeuepepmmlslbeetbessee-rdffrraro33,om,m22n0t0t0hh02ee2aowawafneenllddlsiss"gshwwhhyieteipprirppueeseeodccdroocoeollcvlvleoacecrrtrtmsbeneiodidgngh(hbbtFtyyoConEE)nncnvoivocioiemrropottnoonommuEEeenxnxndytytsagagl.loe'InnRRHeReossesooseuuearrarccrceechhG,~,rrInIoonuucpp.,,((ELLExLLyCxCgey((nEE)gRRffoeGGo)r)nhtoho)enne..
requested analyses0f eightfluorocarbon (FC) compounds.
ange .QNQC.:
: "
"
tA`oCoAossmqqiipnunuaoddaliiuilccinttaayydttese.aaddsswst0soouurrryye~aoonr~suucuceceppicr/rqqeeeuvusvaiasiloolltiuutusyyslllyyycc,,ooannEEnttaxrxrlooyylylggzeee((nnQdQArrAa6e]GQnvvidiG(s~se)qe).dudaiisaansslnnsuiuddieesesrr.de.e.--iisQsSssSAueuo/evevdeQdennGtitssooi-fspfps[rettuehhleifemesm"'iieewnniieagagrrrhhyety.t,arrrsereeesppqqooouurcrteietsascdtttuueeeededd.
w"SacoociicttcmhhcohpmpttoohhaopueetannCCndyiy4s4hnienwaagglcceaiiarlbddaeobr((soaHbHutre~aocprptcrtoyteaarsfypfsrlluorpfieuotoooplrrlcoyorcobrbl,atuu,snlt.t1yayhdrgleyScczaGCeaam4cd4cpiilddaaa)a)ccniidadqadnnuqaaaaaulnlnyynaaiosnlyceyaliasstf.ies.eisdnAA.aohs.faQodiirdnAntddhlo/oiiQoecvwaCaGttsse4eipdsdoiskaeiiucnenei'rdrsSSeieeecswccocnteotvoiirvoeoetnernirrea55esss.p.s77oaaoornncotfdidfead.td'ttdhehdiiddeen
Exons final laboratory report not r~eet the laboratory protocols..
Ex~igen's final laboratory report.
S~mplequantitation
for
the
C4
acid
is
notreported
in
FFlluuxxAAnanlaylyssiiss,
UeaeuUstms5iseeninm6pnsgulgoattttyphhtieehehodeecnlc.oDaaonDcencsooecsoenTceenrsehyrvesmvmiareabsvirbteeevavievaxtererited2aivvr2as0eec0ss0i0seeusu2v2vmeamasl.plSauupinaaamtditimotpiiononlpostnnleteothhaeoafnasafattnhahlaaeytellltlhypipat.FoiFcloctCCaateoeslslnnvdtmdmtiaoeiaaatnealltaaasDDwsfuT1fuhrrFrroeoeFeCmmCdnditgguinthnhrseroeittuhnnhongeonegduegrwwwtnroaohmudtueomnennsdaroidefwfnttllwvaoioottweasorwetrri..eirTnnyrTggmhchm,woooewoenvolvesevlaelaeslvsw,lanw,iulvuiahE~iEatoiotRRiiuovuoGGnotnt.
:
`assumptions,groundwater FClevels al attenuation. This exercise indicates
assumption& groundwater FC levels at
DI shoud that even
D.1 should
haveroadversseffectscn Mississipi when us!rig these very conservative
have no adverse effects on Mississippi
RiRviveerrwwaatteerrqquaulailtityy.,
..
Concentration * DISChaTgesas = Conoantatonye * Discharges TThheeffoolllloowwiinnggrreellaattiioonnsshhiippwwaassuusseedd1t00"eessttiimmaatteeFFCCcconocnecnetnrtarattiioonnssiinntthheerriidveerr:. -
-
ConcentrationA~f~ ~ Discharge~.~=f~r = Concentrationa~,e~ * DischargeR~,~r
.
-
EEx1xh8hi8ibb3iitt
1883
State of Minnesota v. 3M Co.,
Court File No. 27-CV-10-28862
W_NOTOT0351
3M MN01010361
1188833..00000011
spon emorim : N~,POA DI~ M~momndum FoFon B70 : February 13;:2,,Q03- "
Page 2
To cloth dchaorftgh aqui;tho folowing cual vas od: To calculate the discharge of the aquifer; the following equation was used:.
wowed H.W.K.dh_
Qtsaminy = oA Q(gallmin) -
dl 1440
en: 1E i 100 min ts Where:
H (fl) = Plume Thickness
K(g=Ho yuk aCot nduct) ialy W (ft) = Plume Widfl3
K (gpd/f~) = Hydraulic Conductivity dh/dh ,'ft/[t) -- Hydraulic Gradient
Tis oquaon was olan rom tho MPCA Water Cty Dvn, Hust kor Striaco This equation was obtained from the MPCA Water Quality Division~-Hequest for Surface Water Tos pt Assessment frm. Tho saloon of parameter Vokes isons Water Toxics Impact Assessment form The selection of parameter values is discussed Deon below.
PlumeThickness (4) Plume Thickness. (H) JHEH ~ 66 feet
Puma ines vas assumed o sua he saute zone Tiingss fom te mesured Plume thickness was assumed, to equal the saturated zone thickness from the measu[ed. Voto bi coaaf thte nowsD1 re wes 1htp th St.LawrwcsFormaon, water table elevations at the new D1 area wells to. the top of the St. Lawrer~ce Formation.. Tho SiLaurence Formaion has. an ugper sac coven ofsppoamatey 623 0 The St. Lawrence Formation has an upper surface elevation of approximately 625 feet as founwels clua sst hesastod on Inkswsomeby vig tfthoheuesnstdtaatintijccwwwaeatlletser-Felllseevevewellhddeaartetaafafrtroothmmewweslietelll.MMW-WT-h1-e~00s22aatatutrtathhteeedttiizmmoeei~tethhteehwiwceklenlllewwsasassws.saa.sam,mpelpsetleidmdaiitnneDdD,eebccyeem~msbbienergr " 2003 350.50 totaboveSeale. Thecranesboo h wer coven x MI: 2002 (690.93 feet above sea level). The difference between the water table elevation at IViW: 102 adhe approranat pperaufac fh St.LawtoncaFormation 6fot. Tha value 102 and the approximate upper surface Of the St. Lawrence Formation is 66feet.. This value 1s consola ash compl personof hoFC consents rough th ants is conservative as it assumes complete dispersion .of the FC constituents through.the entii'e
`tthhiicckknneessssoofftthheeaaqquiufifeerrwwitithhiinnt.thheepplluummee..
PlumeWid 1) Plume Width (W). WES . W = 300 feet.
"
, .~.
Th pms dh was delrmined bus on he assanpion hal the pms woud diporse The plume width was determined based on the assumption .th&t the plume. woulddisperse dowadent and oman lps wih an voraga umlwthaca1 4 he anc om downgradient and forman ellipse With an average plume width, equal to 1/2 the distance from S ar 1y h ue 600fot).Tisval 1appro30xoiot. the sou,r~ area-to the.river (600.feet), This value.is approximately 300 feet. ,
Hydraulic Graont (ac) Hydraulic. Gradient (dhJdl)
.
hi 0o0gss dh/dl =.0.00655 ft/ft
"TThhee-hhyyddrraauuliliccggraraddiieenntt wwaass ddeetteerrmmiinneeddbbaasseeddoonntthhee cchhaannggeeiinn wwatateerr ttaabblleeeleelevvaattiioonn
Sonioon TALE dn is hada yh ance om A021 he er (300 100. I~etween MW-102 and theriver, divided by the distance from MW-;102 to the fiver (600 feet).
Tepo clvaon of hr (557.0 its alydterind om a USGS Cusdranglo map `Taannhddevveperoiroiffliieeeddlef.fvrroaomtmiomnmeaoesfatushurereermim.evenentr(ts6sa8af7tL.0Lo)oowckkaasannidndiDtDiaaallmmy d22e(t(leloorcmcaaitnteeedddaatfrtoHHamsatsaitinnUggSss)G)cocSlolQlleeuccattdeedrdabbnyygtltehheemSSaUpt.
-
PPaauu~l DDiissttrriicctt UU..SS...AArmmyy CCoorqp~ss ooff EEnnggiinneeeerrss wwiitthhiinn 22--44 hhoouurrss ooff wwaatteerr lleevveell' mmeeaassuurreemmenetnsts.
kein hgnw ols oy ERG. taken in the new wells.by ERG.
ddiWvddll ==:((6960.993-6087..00 9ft))//(3(66(0~-00..00600ftft)8)==070..00.006650555ff0tujftt
11888833..00000022
awmoroross2
3M MN01010362
MCAD! Veneta MPCA D1 Merne~andunl Feomsy 15.7000 February 13, 2003 Page Page3
HHyyddrraauulliicc CCoonndduuccttiviivtyi((tKK)y)
KK==2277..77 ggaalllioonnss/]ddaayyf/iftt~'
mmEvEoeRRonsGinGttiitoouagrrsadiientnhdiggotl wwnheeelRlllehp(y(ModVrWrIo ta--uf11ol9i3rc))CbCboyoyn lnRaRdoguoyscytiGFFvr..ie toyWWvoveesa.stlutooenn,,((27II7n.nc..77.
pit ect ck gpd/ft2 estimated for the nearest site i ine February 1966 Final Remedial in the February 1986 Final Remedial
I.nvestigatiO!i Report for Cottage.Grove.
-
U
stUhisoninqggutheheers:seelleecctteedd
pplluummeewwididtthhaannddhhyycdrraauuilicc
conduchty
conductivity,
he
the
discwahsacalreugateec
discharge was calculated
for
for
the aquifer:
WW =200 fat)
]
KK,W==22=77.3.7700((g(gpfedoe/dftt)2))
Zag galn
Aquifer Discharge--
2..493 gal/min
TAT((hoohubebetedtaaiirdnnsieesccddchohanffarrclroeggomneemtvrv33aaaMMltlu)ui)eoeiunisssuss11wee..e8ddr77fe99foobbbriaitlltslhhiioeeoend.nrngeogvaanerllrllaoion~nnsssa22yp5p5leeparrpalerddraoafcyoyeennsoottrurolof11f,,f33ttrh00hoe44em,,8m8mt66eh1e1dediggiDaaaaonnllcllboboonnaamsssbseeppfeerelorrw.2mm.0i0inn2TTuuhthtsaeeatatm(v(gpvgalpaoliml)uun.)ege.
evasseummnarizted below: Aquifer concentrations .were
event as su.mmadzed below:
based
on
analytical
results
from
the
December
2002
sampling
AmcRao -bcm 002 3
" TT
=
Analytical R~ults - December 2002
[sam}eIam--1 | Eaae a | WL oe i--|--- ios Sample [bowie| co wor --1 Lab Duplicate Tor oe ame | om | Field DuP!iCa;~e ne oe ome | os won| Average
MV~-10t (ppm) 0.170 0.180 0.172 ~3.174 "
PFOA
: MW-102 iPPm) "
0.324 0.404 0.369 0.366
. .
P'FOS
: ,MW-101 ,(ppm)_
MW-!02 (ppm)
0.325
0.384
0.356
- 0.394
0.358
0.336
.. 0.371 ,'
El=] =[=T'1 =] Cone (Average ppm) --
0.174
0.366
0.34-6
0.371
CCooncnenctreatinontAqaquuo~enr*" DDiisscchhaarGgees~qua,exr == Concantaons ConcentrationRiv,r **DDiisscchharagreRg~eerr
or
Dischargeon -
'*CCeoncenrltrcaIoenRn~etr==rCCoonar~cceetnnttrirataiotoniAoqnnus~eDr i* DsiscchharaqerAagqs~eeer
Discharge~,
11888833..00000033
M3M_UNMON100101100335633
sflees } . MPCA D! Memorandum BeFebruary 13, 2063
Page 4
ang. e| wan | or Groundwater a I Predicted | om
Dec. 2002
(ppm) |
a he LEY Bs
TromioteeHaEViaFaOAPtECs acer deisoooy Sda Noss %-he ntedm }}e@th base~ va ues {HBV} t@ Pi-~A!PSOS Cecent y @eve@pea by the e b A o r e I n J as the most ~esidctiveoi ~,he ~C HBV'S (I .00E-03 ppm) was c0mpared-to the maximum I aIJ FC's (5.48E-06 ppm~. At~hough .~sing the HBV in this manner has do technicaL basis, this eo In oummery, ERG' avaksaoonf polenta grouncaterdischarge fc 0 he For (given comparison affirms that the groundwater flux from the site causes no unacceptable risk "
~n S~mma~,, ERG% evaluation of potential groundwater discharge .effects to the rKe~ (given
ro combos S000) ots outevsr1 1Be ~0 co~centratJons ~esent at ~1 ~n D~embeF 2002MndJ~t~sgroundwater FC JeWels at 5vrpee osscaaenei.nTgoe rSer sn nwoobmoetnSiengpaOf eav: oroepwaolde DT350 when it becomes available. oss cotton Ca an (8232T0a2o47r6)a rPyaSBeoik n(GoT2c3o5mSAnTtT)ssof otsnlifchoox Please contact Dan Comeau {612:389.2478} 5~ Pa@ Bc~ok (6!2.339.4779) of this oifice or
TcddFask~ngat3M(65~:o778.53- 44.),,~ y~ ou nave an} questions or commen~s oon. cemlnc~~ the
avi aero information provided in thb memorandum. Encoies Gorin) ToCaner5 CCCO:: Mr. TTooddddFFaasksngk, 33iMME~ nT&g&S~,SSS
Mark Gaetz, 3M ET & 88
11888833..00000044
Suororosss 3M MN01010364