ML18150A568

Lacrossesolutions, LLC - Submittal of Site Investigation Work Plan

ML18150A568
Person / Time
Site:	La Crosse File:Dairyland Power Cooperative icon.png
Issue date:	05/24/2018
From:	VanNoordennen G P LaCrosseSolutions
To:	Zeichert T Office of Nuclear Material Safety and Safeguards, State of WI, Dept of Natural Resources
MVaaler NMSS DUWP
References
LC-2018-0039
Download: ML18150A568 (75)

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SITEINVESTIGATIONWORKPLANLACROSSEBOILINGWATERREACTORGENOA,WISCONSINDNRBRRTSACTIVITY#02-63581112DNRFID#663020930 byHaley&Aldrich,Inc.Portland,Maine

forLaCrosseSolutionsGenoa,Wisconsin

FileNo.128924004May2018www.haleyaldrich.com iListofTablesiiiListofFiguresiiiListofAcronymsiv1.Introduction11.1SITELOCATIONANDDESCRIPTION11.2PURPOSE11.3APPLICABLECODES,STANDARDSANDGUIDELINES11.4WORKPLANORGANIZATION22.SiteBackground22.1SITEHISTORY22.2PHYSICALSETTING22.2.1Topography32.2.2Geology32.2.3Hydrology42.2.4SurfaceWater52.3SUMMARYOFPREVIOUSINVESTIGATIONS52.3.1PreliminaryConceptualSiteModelandHydrogeologicInvestigation52.3.2GroundwaterMonitoring63.ConceptualSiteModel94.InvestigationWorkScope104.1ADDITIONALGROUNDWATERQUALITYMONITORING104.2GROUNDWATERMODELING104.3DYETRACERSTUDY114.4VAPORINTRUSIONEVALUATION114.5RECEPTORSURVEY115.SampleCollection125.1SAMPLINGMETHOD125.2SAMPLECUSTODYANDMANAGEMENT125.3LABORATORYANALYTICALMETHODSANDDETECTIONLIMITS125.4EQUIPMENTCALIBRATIONANDDECONTAMINATION136.QualityControlandDataValidation137.ScheduleandSequence148.Report14 iiReferences15TablesFiguresAppendixALCRPPR057RevisionNo.2 iiiListofTables TableNo.Title 1SummaryofRadiologicalAnalyticalResultsforGroundwater2AnalyticalMethodsandDetectionLimits ListofFigures FigureNo.Title 1 SiteLocus2 SitePlan3GroundwaterContoursShallowAquifer 4GroundwaterContoursDeepAquifer5EstimatedExtentsofTritiumImpactedGroundwater

ivListofAcronymsAECAtomicEnergyCommissionALARAAOIBgsCm/secAsLowAsReasonablyAchievableAreaofInterestBelowgroundsurfaceCentimeterspersecondCs137Cesium137Co60COCCobalt60ContaminantofConcernCSMD&DConceptualSiteModelDecontaminationandDecommissioningftfeetorfootft/ftfeetperfootHaley&AldrichHaley&Aldrich,Inc.H3ISFSITritiumIndependentSpentFuelStorageInstallationLACBWRLaCrosseBoilingWaterReactorLTPLicenseTerminationPlanMCLsMaximumContaminantLevelsMSLMWePCBsMeanSeaLevelMegawattElectricalPolychlorinatedBiphenylsNi63NRCSAFSTORSIRNickel63NuclearRegulatoryCommissionSAFeSTORageSiteInvestigationReportSr90USEPAVOCsStrontium90UnitedStatesEnvironmentalProtectionAgencyVolatileOrganicCompoundsDNRWisconsinDepartmentofNaturalResources

11. IntroductionHaley&Aldrich,Inc.(Haley&Aldrich)haspreparedthisSiteInvestigationWorkPlan(WorkPlan)onbehalfofLaCrosseSolutionstoassesstritiumconcentrationsdetectedingroundwaterattheLaCrosseBoilingWaterReactor(LACBWR).ThisWorkPlanhasbeendevelopedinresponsetotheletterreceivedfromtheWisconsinDepartmentofNaturalResources(DNR)datedMarch30,2018whichenteredthereportedcontaminationintotheBureauforRemediationandRedevelopmentTrackingSystem(BRRTS)asActivity#0263581112.1.1 SITELOCATIONANDDESCRIPTION Thesiteislocatedat4601StateHighway35,Genoa,inVernonCounty,Wisconsin(43o13'35"northand91o13'53"west)asshownonFigure1.Surroundinglandsarepredominantlyusedforagriculture(dairy)andforestry(DPC,1972).LACBWRisborderedtothewestbytheMississippiRiver,tothenorthbytheformerGenoa1coalfiredplant(currentlyavacantlot),totheeastbyStateHighway35andtothesouthbytheGenoa3coalfiredplant.Therailroadalsocrossesthroughtheeasternportionoftheparcel,eastoftheplantstructures.LACBWRwasbuiltin1967aspartofafederalprojecttodemonstratetheviabilityofnuclearpower.Itcontainedasmall50megawatt(MWe)electricalnucleargeneratingplantthatutilizeda165MWeboilingwaterreactorthatwasownedandoperatedbytheDairylandPowerCooperative(DPC).In1987,after19yearsofoperation,theplantwasshutdownandwasplacedinSAFSTOR(1991).In2007,thereactorpressurevesselwasremovedandshippedtotheBarnwellWasteManagementFacilityinSouthCarolina.Thesiteiscurrentlyundergoingfinaldecontaminationanddecommissioning(D&D)withthegoaloflicensetermination.SitefeaturesandboundariesareshownonFigure2.

1.2 PURPOSEInaccordancewithSection292.11oftheWisconsinStatuesandChapterNR716oftheWisconsinAdministrativeCode,thisWorkPlanhasbeendevelopedtoinvestigatethepotentialsourceofthetritiumcontaminationfoundinthegroundwater,tofurthercharacterizethecurrentconcentrationsseeningroundwateronsite,andtoverifythattheseconditionsdonotposeathreattothedrinkingwaterwellslocatedonsiteortotheMississippiRiver.Priortothereleasereportedon14March2018,noimpactstositegroundwaterqualitywereobservedinthemonitoringwellnetworkwhichwasestablishedandmonitoredduringD&Dactivitiesstartingin2013asdiscussedinSection2.3.2.

1.3 APPLICABLECODES,STANDARDSANDGUIDELINESTheNuclearRegulatoryCommission(NRC)istheprimarystakeholderforlicenseterminationhowever;theDNRandUnitedStatesEnvironmentalProtectionAgency(USEPA)regulationsapplytositegroundwater,soil,andsurfacewaters.Allsiteinvestigationactivitieswillbeconductedinaccordancewithalllocal,stateandfederalrules,lawsandregulations,includingbutnotlimitedto: Section292.11WisconsinStatutes; WisconsinAdministrativeCodechaptersNR700throughNR754; WisconsinAdministrativeCodechapterNR140; 2 NuclearRegulatoryCommission;and USUSEPA40CFR761.61forPolychlorinatedBiphenyls(PCBs).1.4 WORKPLANORGANIZATIONTheremainderofthisWorkPlanpresentsthefollowing:

Section2-SiteBackgroundSection3-ConceptualSiteModelSection4-InvestigationWorkScopeSection5-SampleCollectionSection6-QualityControlandDataValidationSection7-ScheduleandSequenceSection8-Report2. SiteBackground2.1 SITEHISTORYLACBWRisa50MWenuclearpowerplantthatisownedandwasoperatedbyDPCofLaCrosse,Wisconsin.TheplantislocatedontheeastbankoftheMississippiRiverinVernonCounty,Wisconsin,approximatelyonemilesouthofthevillageofGenoa,Wisconsinandapproximately19milessouthofthecityofLaCrosse,Wisconsin.TheplantwasoneofaseriesofdemonstrationplantsfundedinpartbytheUnitedStatesAtomicEnergyCommission(AEC).TheAllisChalmersCompanywastheoriginallicensee.TheAEClatersoldtheplanttoDPCandprovidedDPCwithaprovisionaloperatinglicense.LACBWRachievedinitialcriticalityon11July1967andbegancommercialpowergenerationon1November1969.Theplantoperatedfor19yearsuntilitwasshutdownpermanentlyon30April1987.TheNRCapprovedtheDecommissioningPlanon7August1991.DPCconducteddecontaminationanddecommissioning(D&D)activitiesuntilthemiddleof2014,whenitwasdecidedtoreturnthefacilitytoSAFSTORuntiladditionalresourcescouldbeobtainedtocompletethedecommissioningeffort.InJune2016,DCPtransferredthestorageanddecommissioninglicensetoLaCrosseSolutionsforthepurposeofcompletingthedecommissioningeffort.Severalstructures,includingthereactorcore,havebeenremovedfromsite.ThespentfuelisallstoredontheISFSIstoragepad.

2.2 PHYSICALSETTINGTheLACBWRsitelocationwasfirstdevelopedbyhydraulicdredgingandrelocatingsandsfromtheadjacentrivertofillinthelowlyingareastoextendtheshorelinesuchthatthereactorandsupportingstructurescouldbeconstructed.Thissectionprovidesanoverviewofthephysicalsettingofthearea,withafocusontheplantitselfandspecificallyhowthephysicalsettingimpactsgroundwaterflowdirectionsandhydrogeologicalproperties.

32.2.1 Topography ThesiteislocatedwithintheMississippiRiverValley,wherethevalleyiscutintohighlydissecteduplands.FromLaCrossetoPrairieduChien,Wisconsin,thevalleywidthvariesbetween2.5to4.5milesandthevalleywallsrisesharplytoheightsof500to600feetabovetheriverlevel.

Initially,thesiteconsistedofmarshesandlowlyingwetlands.Thecurrentpropertywasthenbuiltupthroughthedepositionofhydraulicallydredgedsandsfromtheriver.Duringthesandplacementandsitepreparation(priortoconstruction),theareawasgradedtoarelativelyflatgroundsurface.TheresultinggradefortheLACBWRsiteisgenerallyflatwithgradelevelatapproximately639feetaboveMeanSeaLevel(MSL)fromtheaccessroadalongtheeasternboundaryofthesitetotheriprapalongtherivershore(Figure2).

ThesiteissituatedbetweentwovalleysthatcutintothebluffslocatedeastofHighway35(Figure1).Thefirstvalleydrainstoanareanorthofthesite,towardGenoa,andthesecondvalleydrainstoanareasouthofthesite.Thesetwovalleyslimitthedrainageareathatmaycontributestormwaterrunofffromupgradientsources.Furthermore,drainageupgradientofthesiteischanneledalongthehighwayandrailroadintoarechargeswale.Asmallamountofotherdrainagefromtherailroadrightofwayandnearbyhillsischanneledtotheriverviathreeundergroundculverts.TheseculvertscrossthepropertydischargingtotheMississippiRiver(DPC,1972).

2.2.2 Geology

LACBWRislocatedontheeastbankoftheMississippiRiverintheWisconsinDriftlesssectionoftheCentralLowlandPhysiographicProvince.ItsitsonthesouthwestflankoftheWisconsinDomeandthewesternflankoftheWisconsinArch.Thesedimentarystrataorbedrockinthisregiondipslessthan20feetpermiletothesouthwest(Dames&Moore,1973).

Muchoftheregionalandsitegeologyhasbeenstudiedandiswelldocumented.Duringconstructionandthenduringsupportofseismicstudies,soilboringswerecompletedwithintheLACBWRfootprintandtheshallowgeologyisverywellunderstood.

Generally,thelocalgeologyisdescribedasapproximately15feetofhydraulicfilloverlying100to130feetofglacialoutwashandfluvialdepositsontheeastfloodplainoftheMississippiRiverValley.TheseunconsolidateddepositsareunderlainbyflatlyingsandstoneandshalesoftheDreshbachGroup(UpperCambrian).TheDreshbachGroupisthenunderlainbydensePrecambriancrystallinerocksencounteredatapproximately650feetbgs(Dames&Moore,1973).Atthesubjectsite,thebedrocksurfaceisencounteredatanelevationofapproximately509feetaboveMSLneartheReactorBuildingandslopestoapproximately501feetaboveMSLneartherivershoreline.

Numerousgeotechnicalsubsurfaceexplorationshavebeenconductedonsite.Belowisasummaryofsitespecificsoilconditionsencountered. 0to20feetbgs.HydraulicFill-Fillsandsareencounteredfromapproximately0to20feetbgsanddescribedaslightbrowntobrown,finetomediumsandswithoccasionalfinegravel. 20to30feetbgs.Browntogrey,finetomediumsandsunderliethefill,withanaveragethicknessof7to28feet.

4 30to100feetbgs.Brown,finetomediumsandsthatalsohavezonesofcoarsesandandfinegravelbelowthefinersands. 100to115feetbgs.Brownfinetomediumsandandfinetomediumgravels. 115to135feetbgs.Brownfinetomediumsandwithtracesilt,occasionalzonesofgravel.

Thesedatawereusedtobetterunderstandsitehydrogeology,specificallyhowtheshallowunconsolidateddepositsthatunderlieLACBWRgoverngroundwaterflow,aswellas,thefateandtransportofpotentialradionuclidesinboththevadosezoneandintheaquifersbelow.

2.2.3 HydrologyRegionally,groundwaterflowsfromtheblufftowardstheMississippiRiver.Closertotheriver,itislikelythatthegroundwaterflowdirectionturns'downstream'asgroundwaterdischargestothesurfacewater.Groundwaterelevationdatafromsitemonitoringwellsagreewiththeregionalgroundwaterflow,andshowseasonalvariationonupwardanddownwardgradients,thatareinfluencedbytheriverstage.Groundwaterbeneaththesiteisfirstencounteredatdepthsrangingfromapproximately15to25feetbgsandthewatertableaquiferisinstronghydrauliccommunicationwiththeadjacentMississippiRiver.GroundwaterintheshallowdepositsandfillmaterialflowstowardsthewestanddischargesintotheMississippiRiver.Thedeepergroundwaterflowswestbutmaybeinfluencedbytheriverandmayturnandflowparalleltotheriver.SitemonitoringwelllocationsandgroundwaterelevationcontoursareshownonFigures3and4.

Groundwaterflowthroughthesiteisgenerallytowardstheriverbutimpactedlocallybythedeeperstructures(i.e.,thecontainmentstructureshell)aswellasthedeeppilingsthatsupportthestructures.Duringplantconstruction,andmorespecificallytheinstallationofthesupportpilings,thesoilwascompacted,reducingtheeffectiveporosityandpermeabilityofthesoils.Thisreductioninpermeabilitylikelydecreasedthehydraulicconductivityoftheaquiferwithinthefootprintofthebuildings.Theresultingimpacttogroundwaterflowisthatgroundwaterwithinthecompactedsoilswillflowataslowervelocity.Basedonthesoilclassificationoffinetomediumsands(SMandSP)andsilts(ML)fortheshallowsoils,expectedhydraulicconductivitiesfortheshallowaquiferrangefrom105centimeterspersecond(cm/sec)(or101feetperday[ft/day])to101cm/sec(or100ft/day).Theaverageshallowaquiferhydraulicconductivityisapproximately313feetperdayandtheaveragedeepaquiferhydraulicconductivityisapproximately429feetperday.

Thehorizontalgradientofthewatertablerangesfrom0.004to0.005feetperfoot(ft/ft)intheshallowaquiferand0.001to0.002ft/ftinthedeeperaquifer.Verticalgroundwatergradientsalsovaryandareimpactedbytheriverstage.Generally,thereisanupwardgradient,asexpected,duringthelowriverstageswithadownwardgradientduringtimesofextremelyhighwater.Verticalgradientsaresmallandrangefrom0.015ft/ftinthedownwarddirectionto0.028ft/ftintheupwarddirection.

5Groundwatervelocityisdirectlyrelatedtothegradientsordifferenceinhydraulicheadacrossthesite.Groundwatervelocityintheshallowwaterbearingzonerangesfrom0.13to1.67ft/dayand0.25to0.69ft/dayinthedeepzone(Haley&Aldrich,2016).2.2.4 SurfaceWater LACBWRislocatedalongtheMississippiRiverwiththedischargelocatedattheheadofThiefSlough,asidechanneloftheMississippiRiverthatisseparatedfromthemainchannelbyIsland126.TheMississippiRiverValleyfloorisprimarilycomprisedofmarshlands,withislandsbetweenriverchannelsandextensionsoflowlyingfloodplaincutbyponds,sloughsandmeanderingstreamchannels.Themainchanneloftherivervariesgreatlyinwidthbothaboveandbelowthesite.AseriesofdamsareoperatedbytheUnitedStatesArmyCorpsofEngineersfornavigationalpurposes.AboveDamNo.8(about3/4milenorthofthesite)theriverisnearly4mileswide.Belowthedamandclosertothesite,theriveris1,500to2,000feetwide(DPC,1972).ThepublishedfloodstagesfortheMississippiRiveratthesiteare: 50yearfloodstateisat635'2"aboveMSL 100yearfloodstageis637'2"aboveMSL 500yearfloodstageisat640'aboveMSLTherefore,the100yearfloodiswithintwofeetoftheplantgrade(639feetaboveMSL).

2.3 SUMMARYOFPREVIOUSINVESTIGATIONSSeveralphasesofenvironmentalassessmentsandinvestigationshavebeenconductedonsitesince2012.Thissectionprovidesabriefsummaryoftheworkperformedandsignificantfindings.

2.3.1 PreliminaryConceptualSiteModelandHydrogeologicInvestigationInAugust2012,Haley&AldrichdevelopedapreliminaryHydrogeologicCSMfortheSitebyreviewingavailablerelevantdocumentsregardingtheplantconstruction,physicalsetting(e.g.geology,hydrogeology,etc.),andhistoricoperations.InSeptember2012,basedonthepreliminaryCSManddatagapsidentified,Haley&AldrichdevelopedaHydrogeologicInvestigationWorkPlan(WorkPlan)toevaluatetheAOIsandobtaindatatocharacterizethesite'shydrogeologyandsupporttheD&Defforts.TheWorkPlanwaspairedwithaQualityAssuranceProjectPlan(QAPP)toensurethethatappropriateanddefensibledataarecollectedandthatallregulatoryrequirementsaremet.Thescopeoftheinvestigationincluded: Drillingoffivedeepboringsforobservationandcollectionofsoilsamples; Installationoffivepairedmonitoringwells; Collectionofsoilsamplesforgeotechnicalanalyses; Hydraulicconductivitytestingofallnewlyinstalledwells; Collectionofgroundwaterlevelmeasurements;and Collectionofgroundwatersamplesforonsitetritiumanalysisandoffsiteradiochemicalanalyses.

6ResultsoftheHydrogeologicalInvestigationareincludedinour"HydrogeologicInvestigationReport"dated15January2015,revised14February2016.Pertinentfindingsandconclusionsaresummarizedbelow: Geologyiswellunderstoodandconsistsoffillsandsoverlyingfinetomediumsandswithincreasinglycoarsesandsandgravelwithdepth.Bedrockisencounteredatapproximately130feetbgs.Ingeneral,themonitoringwellnetworkinstalledwithintheLACBWRareaisscreenedinmediumormediumfinesand. GroundwaterflowstowardstheMississippiRiverandishydraulicallyconnectedtotheriver.Riverstageaffectslocalgroundwaterfluctuationsandmayslightlyaltergroundwaterflowdirectiontoparallelriverflow.Typically,groundwaterisencounteredatapproximately20feetbgs. Theaverageshallowaquiferhydraulicconductivityisapproximately313ft/dayandtheaveragedeepaquiferhydraulicconductivityisapproximately429ft/day. Thehorizontalgradientofthewatertablerangesfrom0.004to0.005ft/ftintheshallowaquiferand0.001to0.002ft/ftinthedeeperaquifer. Verticalgroundwatergradientsareimpactedbytheriverstage.Generally,thereisanupwardgradient,asexpected,duringthelowriverstageswithadownwardgradientduringtimesofextremelyhighwater.Verticalgradientsaresmallandrangefrom0.015ft/ftinthedownwarddirectionto0.028ft/ftintheupwarddirection. Groundwatervelocityintheshallowwaterbearingzonerangesfrom0.13to1.67ft/dayand0.25to0.69ft/dayinthedeepzone. ThedataindicatethattheshallowaquiferhasslowervelocitiesandgroundwatermovementbelowtheTurbineBuildingandfastergroundwatermovementoutsideandaroundtheTurbineBuilding,suggestingsomeinterferenceofthesubsurfacepilingsassociatedwiththebuilding.Groundwatervelocitydataforthedeepaquiferindicatelessvariabilityandlacktheinfluenceofsubsurfacedisturbances. ThemostlikelyAOIswhereradionuclidescouldhavebeenreleasedtosoilsandgroundwaterincludetheTurbineBuildingwastecollectionsystemandtheUndergroundGasStorageTankVaultandPiping.NoradionuclidesweredetectedabovebackgroundfromthegroundwatermonitoringwellssuggestingthattheseAOIsdidnotimpactdowngradientconditions. Groundwateranalyticalresultsdidnotreportradionuclidesatactivitiesabovebackgroundinanyofthesamples;historicsiteoperationsdidnotsignificantlyimpactgroundwaterqualitydowngradientofthepotentialAOIs.2.3.2 GroundwaterMonitoring Severalroundsofgroundwatersampleshavebeencollectedfromsitemonitoringwells.Thisincludestworoundsofgroundwatersamplescollectedin2014;andquarterlysamplescollectedin2015.

7SampleswerecollectedfrommonitoringwellsMW201A/B,MW202A/B,MW203A/B,MW204A/B,MWB11R,andMWB11AR(Figure2).

GroundwatersampleswerecollectedusingUSEPA'sLowStress/LowFlowSamplingMethods(USEPA2010)withfieldparametermeasurementsforthefollowing: pH; oxidationreductionpotential(ORP); Temperature; Conductivity;and Turbidity.

Aspartofthiscollectionmethod,groundwaterispurgedasaratenottodepressthewatertable.Samplesarethencollectedforlaboratoryanalysisoncethefieldparametershavestabilizedtowithin10%.

GroundwatersamplesweresubmittedtoEberlineAnalyticalServices(OakRidge,Tennessee),ChemicalServicesLaboratory(LaCrosse,Wisconsin),andNorthernLakeService(Crandon,Wisconsin)foroneormoreofthefollowinganalyses: Radionuclidesbyalphaandgammaspectroscopy; Volatileorganiccompounds(VOCs)byUSEPAmethod8260C; Inorganicconstituents,ormetalsbyUSEPAMethods9056,6010B,7010B,and/orSW846;and Polychlorinatedbiphenyls(PCBs)byUSEPAMethod8082.Sampleswerealsocollectedindomesticwellsnumber3,4,and7(inJune2014,radionuclidesonly)anddomesticwellnumber5(inJuneandSeptember2014andquarterlyin2015,fullsuiteanalyzed).DomesticwelllocationsareshownonFigure2.InDecember2016,May2017andDecember2017additionalgroundwatersampleswerecollectedfrommonitoringwellsMW200A/B,MW201A/B,MW202A/B,MW203A/B,MW204A/B,MWB11R,MWB11AR,anddomesticWellNumber5.(Note:MW201BwasdestroyedduringdemolitionoftheTurbineBuildingandwasnotsampledinDecember2017).AnadditionallimitedroundofgroundwatersampleswascollectedfromMW201A,MW202AandMW203AinFebruaryandanalyzedfortritiumonly.

GroundwatersamplesweresubmittedtoGeneralEngineeringLaboratories(Charleston,SouthCarolina)forthefollowinganalyses: RadionuclidesCo60andCs137bygammaspectroscopy; RadionuclidesNickel63(Ni63)andtritium(H3)byliquidscintillation;and RadionuclideSr90bygasflowproportionalcounting.AsummaryofradiologicalgroundwateranalyticalresultsisprovidedonTable1.

82.3.2.1 RadionuclideAnalyticalResults Samplescollectedfrommonitoringanddomesticwellsbetween2014andMay2017showedlowlevelsofradionuclidesthatareconsistentwithexpectedbackgroundvalues.ReportedvalueswerewellbelowtheUSEPAMCLsforgroundwateranddonotsuggestsiterelatedimpacts.

DuringtheDecember2017samplingevent,tritiumwasdetectedatMW203Aataconcentrationof13,000picocuriesperliter(pCi/L).Tritiumhadnotbeendetectedatthislocationtheprevioustwosamplingroundsandwaslastdetectedataconcentrationof104pCi/LinNovember2015.WhilethisreportedvalueisbelowtheUSEPAmaximumcontaminantlevel(MCL)of20,000pCi/L,additionalinvestigationwaswarrantedtoverifythedecreasingtrendanddocumentpotentialseasonalimpacts.

InFebruary2018,additionalsampleswerecollectedfromMW201A,MW202AandMW203AtofurtherevaluateresultsfromtheDecember2017event.TritiumwasdetectedbelowdetectioninMW201A,belowtheMCLinMW202A(13,200pCi/L),however;itexceededtheMCLinMW203Aat24,200pCi/L.

Concentrationsobservedinallothergroundwatersamplescollectedduringthiseventshowedlowlevelsofradionuclidesthatareconsistentwithbackgroundvalues.ReportedvalueswerewellbelowtheUSEPAMCLsforgroundwateranddonotsuggestsiterelatedimpactsorincreasingtrends.

2.3.2.2 ChemicalConstituentAnalyticalResults AllVOCandPCBchemicalconstituentswerereportedatconcentrationsbelowtheUSEPAandtheDNRdrinkingwatercriteria.TheregulatorystandardsusedforcomparisonincludeUSEPAMCLsfordrinkingwaterandDNR'sPublicHealthGroundwaterQualityStandardsandPublicWelfareGroundwaterQualityStandards.EachoftheDNRGroundwaterQualityStandards(PublicHealthandPublicWelfare)hasanEnforcementStandardandaPreventativeActionLimit.Thepreventativeactionlimitsare10to25%lowerthanenforcementstandardsforPublicHealthStandardsand50%lowerPublicWelfareStandards.NotethatthePublicHealthGroundwaterQualityStandardsaresubstancesofpublicconcernthatcauseorcontributetoanincreaseinmortality,illness,incapacity,adversehumanhealtheffect,orposeasubstantialpresentorpotentialhazardtohumanhealth.ThePublicWelfareGroundwaterQualityStandardsarealsoasubstanceofpublicconcernbutarerelatedtotheinfluenceofthesubstanceonaesthetics,suitabilityofwaterforotheruses,andadverseeffectonplantlifeoranimallife.VOCs.VOCswerenotdetectedatthesite,withtheexceptionofacetone,chloromethane,tetrachloroethene(PCE),andtoluene,whichwere"J"flaggedindicatingthattheresultwasanestimatedvaluewhichwaslessthanthelaboratoryreportinglimit.PCEwasdetectedinMarchandSeptember2015inMW201AgroundwaterbutwasnotdetectedineitherJuneorNovember2015groundwatersamplescollectedfromthiswell.Chloromethaneandtoluenewereonlydetectedinoneroundofsampling(31Augustand1September2015)andmaybealaboratoryerrororenvironmentalcontaminantfromthesamplingprocedures.Theseconstituentswerenotdetectedinsubsequentsamplingroundsandarenotinterpretedtobesiterelated.Acetonewasdetected(Jflagged)inMW200Aonlyon24March2015andwasnotdetectedinsubsequentsamplingrounds.

PCBs.PCBswerenotdetectedinthegroundwatersamples.

9Inorganics.NoinorganicconstituentsexceededtheUSEPAMCLs;however,manganeseandironexceededboththeDNR'sEnforcementStandardaswellasthemoreconservativePreventiveActionStandard.ItshouldalsobenotedthatelevatedmanganeseandironconcentrationswasalsodetectedconsistentlyinwellB11R,confirmingthatitislikelyeithernaturallyoccurringornotsiterelated.ArsenicandcobaltalsoexceededtheDNR'sPreventativeActionLimitsforatleastonewellinthegroundwatermonitoringnetwork.BothoftheseconstituentswerealsodetectedinWellB11Rwitharsenicatanelevatedconcentration.InadditiontothePublicHealthGroundwaterQualityStandards,severalcompounds(iron,chlorideandnitrite/nitrateasNitrogen)alsoexceededthePublicWelfareGroundwaterQualityStandards.Thesearecriteriathatmaynotberequiredtobeprotectiveofhumanhealthbutaremoreprotectiveofthewaterqualityaesthetics(color,ironchlorides,sulfatesandalsomanganese).NotethatinsomeinstancesacompoundmaybeincludedonboththePublicHealthandPublicWelfareGroundwaterQualityStandards.

PertheDNRregulation,(§140.14(1)(1)),statenotificationisrequiredifgroundwaterresultsexceedeithercriteria.Itshouldalsobenotedthatforseveralconstituents,thelaboratory'sdetectionandreportinglimitsexceedtheDNRPreventiveActionStandardhowever;theseconstituentsarenaturallyoccurringinorganicsanddonotsuggestinfluencesbyhistoricsitepractices.Additionally,thereisnoexposurepathwayforshallowgroundwaterandtherefore,potentialimpactstohumanhealth.

NoinorganiccompoundsweredetectedabovetheMCLsorDNRcriteriafromsamplescollectedfromthedomestic,i.e.drinkingwaterwells.3. ConceptualSiteModelTheCSMwasupdatedfollowingtheHydrogeologicalInvestigation.ItnotedthathistoricoperationsmayhavereleasedCOCstotheenvironmenthowever,noimpactswereobservedinthegroundwatercollectedfromdowngradientwells.Generally,mostofthepotentialreleaseswereassociatedwiththewastecollectionsystemintheTurbineBuilding.Forthisbuilding,radioactiveliquidwastewascollectedbyfloordrains,pumpedintowastewatertanksandthenbatchreleasedintothecirculatingwaterline.Inthelate1970s,voidswerecharacterizedbelowthebuilding(mostlyinthenortheastbelowthelaundryarea).Whenthevoidsweregrouted,groutthenenteredthefloordrains,pluggingthem.ThesedataraisequestionsontheintegrityoftheTurbineBuildingsubsurfacefloordrains.

Therewerelikelylocalizedimpactsongroundwaterflowfromdeeperplantstructureandtheareaswerepilingswereusedtosupportstructures.Theimplicationsoftheselocalizedflowregimesoncontaminantfateandtransportarethatpotentialreleasesthatoccurredwithinthefootprintofthebuildingsviafloordrainscouldtakelongertomigratebothinthevadosezoneaswellastheunderlyingaquifer.Thisisfurthercompoundedastheoverlyingstructuresisolatetheshallowsoilsfromprecipitation,creatinganareathatwilllikelyretainanypotentiallyreleasedcontamination.Therefore,althoughnositerelatedradionuclidesweredetectedabovebackgroundlevels,itwasstillpossibletohaveimpactedmediabelowtheTurbineBuilding.

104. InvestigationWorkScopeOn14March2018,LaCrosseSolutionsreportedatritiumreleasetoDNR.ThiswasbasedonrecentsitedatathatshowedincreasingtritiumlevelsindowngradientgroundwatersamplescollectedfromMW202Aand203A.Toverifythesourceofcontamination;groundwatermigrationpathways;andevaluateifthereisapotentialfortritiumtoreachsensitivereceptors,thefollowingworkwillbecompletedinaccordancewiththerequirementsinNR716oftheWisconsinAdministrativeCode: AdditionalGroundwaterQualityMonitoring; GroundwaterModeling; DyeTracerStudy; EvaluationofPotentialReceptors;and AssessmentofPotentialVaporIntrusionPathways.4.1 ADDITIONALGROUNDWATERQUALITYMONITORING AdditionalgroundwatersampleswillbecollectedfrommonitoringwellsMW202AR(installedinMarch2018followingdestructionofMW202Aandsubsequentabandonmentduetoconstructionactivities),MW202B,MW203AandMW203B,MW201AandMW201B,andfromthewatersupplywellsonsite,tocontinuetoevaluateconcentrationsandmigration.PurgewaterfromwellsthataredocumentedtobebelowtheMCLs(20,000pCi/L)willbereturnedtothegroundintheareaofthewell.Ifthereisapotentialforincreasedtritiumingroundwater,thepurgewaterwillbecontainerizedanddisposedofinaccordancewiththesite'shealthphysicprogram.4.2 GROUNDWATERMODELING Haley&AldrichwillusetheexistingCSMdataalongwithregionalgeologicaldatatogenerateagroundwaterflowandtransportmodel.ThismodelingeffortwilluseMODFLOWandsimplifiedboxmodelforparticletrackingtoassessgroundwaterflowpathsandpossiblecapturezonesinthreedimensions.Additionalanalyticalmodelsorcombinationofmodelsmaybeemployed,ifwarranted,andmaybeusedalongwithMODFLOW.Onceagroundwaterflowmodelisdeveloped,itmayalsobeusedtoestimatecapturezonesforpumpingwells,orguideotherremedyoptions,shouldhydrauliccontrolsordewateringactivitiesbeneeded.Themodelmayalsobeusedtodemonstratethattheexistinggroundwatermonitoringnetworkisappropriatetomonitortheplumemigration,withwellslocateddowngradientofthepotentialsources(asevidencedbythepresenceoftritiuminMW202AandMW203A)andthatthedurationofthedyetracertestisappropriate.PreliminarytestresultshaveindicatednomigrationoftritiumtothedrinkingwaterwellsorupgradienttowardresidentialwellsalongtheothersideofthehighwaysasshownonFigure5.Datafromthesewellsandtheestimatedconcentrationingroundwaterwillalsobeusedtoevaluatethepotentialfortritiumtomigrateviavaporintrusiontositebuildings(iftheyremain)orforfuturesiteuses.

114.3 DYETRACERSTUDY ThepurposeofthisstudyistoconfirmiftheReactorPlant,GeneratorPlantAccess(RPGPA)sumpisthesourcefortritiumdetectedinmonitoringwellsMW202AandMW203A.ThesedatawillalsobeusedtocalibratethegroundwatermodelwithrespecttothegroundwatervelocityaswellasthepotentialfluxoftritiumtowardstheMississippiRiver.

Anontoxicfluorescentdyewillbeintroducedtothesumptoidentifyifitrepresentsthesourceoftritiumtogroundwater.Dyetestingwillbecompletedviathefollowingsteps: WorkPlan:AbriefworkplanwasprovidedtoWIDNRinMarch2018,withthenecessaryinformationtoapprovethedyeintroduction. BackgroundEvaluation:Tofirstestablishthattherearenobackgrounddyespresent,carbonpacketswereplacedinthreeofthewellsonsiteon8March2018.Thecarbonpacketscontaingranularactivatedcarbonplacedinaclothbag.Thecarbonpacketswereremovedafterbeingsubmergedforaminimumofsevendays,driedtoremoveresidualtritium,andsubmittedtothelaboratorytoevaluatebackgroundconditionsandsupportdyeselection. DyeIntroduction

WithWIDNRapproval,approximatelyonepoundoffluorescentdyewillbeintroducedtothesump.Ifthesumpisdry,thedyeswillthenbeflushedwithupto200gallonsofnonchlorinatedwater.Ifthesumphaswater,noadditionalwatermaybeneeded. Sampling:Charcoalpacketsshallbeplacedinupto6wells.Thesesampleswillbereplacedweeklyforuptofourweekstoidentifytheleadingedgeoftheplumeandverifywhetherornotthesumpisthesource.Uponremoval,thepacketswillbedriedandsubmittedtoOzarksUndergroundLaboratoryforanalysis.Oncedataaresufficienttoconfirm/denythatthesumpisthesource,samplingmaybeterminated.AcopyoftheapplicationanddyestudyworkplanisprovidedinAttachmentA.Theresultsofthedyetracerstudywillconfirmthepresumedsourceofthereleaseandbeusedtocalibratethegroundwatermodel,tobeabletoestimatefluxandgroundwatervelocity.

4.4 VAPORINTRUSIONEVALUATIONInaccordancewithChapterNR716oftheW.A.C,Haley&Aldrichwillalsoevaluatethegroundwaterdatawithrespecttopotentialvaporintrusionpathwaysforexistingandpotentialfuturestructures.4.5 RECEPTORSURVEY Haley&AldrichwillalsoperformanevaluationofthepotentialreceptorsintheMississippiRiverandonsite.Wewillusethisdatatoperformalimitedscreeninglevelecologicalriskassessmenttoidentifyanypotentialrisksoftritiumonthebenthicandaquaticreceptors.

125. SampleCollectionGroundwatersampleswillbecollectedinaccordancewiththe"LACBWRSiteRestorationProjectWorkControlProcedure,GroundwaterSampling,ProcedureNo.LCRPPR057,Revision2."(LCRPPR057)Thisdocumentincludesproceduresforsampling,equipmentrequirements,samplecollectionandpreservation,decontamination,qualitycontrolandsampledocumentation.AcopyisprovidedinAppendixA.

5.1 SAMPLINGMETHODGroundwatersampleswillbecollectedusingtheUSEPA'sLowStress/LowFlowSamplingMethods(USEPA2010)withfieldparametermeasurementsforthefollowing: pH; ORP; Temperature; Conductivity; Dissolvedoxygen(DO);and Turbidity.Aspartofthiscollectionmethod,groundwaterispurgedataratenottodepressthewatertable.Samplesarecollectedoncethefieldparametershavestabilizedtowithinapplicablecriteria.

5.2 SAMPLECUSTODYANDMANAGEMENTEachsamplewillbegivenauniqueidentificationusingthefollowingnomenclature:

AABBBCCCCCCwhere:- AArepresentsthesampletype(i.e.MWformonitoringwell)- BBBrepresentsthewelllocation(i.e.201A)- CCCCrepresentsthedateofcollectionForexample,sampleMW201A120617isasamplecollectedfromMW201AonDecember6,2017.Ifaduplicatesampleiscollectedforqualityassurance/qualitycontrol(QA/QC)requirements,a"D"willbeinsertedbetweenthewelllocationandthesamplecollectiondate(i.e.MW201AD120617).

Sampleswillbemaintainedunderchainofcustody,asrequiredbythesitesamplingprocedure(LCRPPR057).AllsampleswillbescreenedonsitebytheRadiationProtectiondepartmentbeforebeingshippedtotheanalyticallaboratoryforradiologicalanalysis.

5.3 LABORATORYANALYTICALMETHODSANDDETECTIONLIMITSSampleswillbecollectedintolaboratoryprovidedglasswareandsubmittedtoGELLaboratories,LLC(GEL)foranalysis.Analyticalmethodsandlaboratorymethoddetectionlimits(MDLs)areprovidedinTable2.

13Table2:SummaryofAnalyticalMethodsandDetectionLimitsCompoundEPAMethodUnitsMDLCesium137901.1(RadGammaSpec)pCi/L10Cobalt60 901.1(RadGammaSpec) pCi/L 10 Nickel63DOERESLNi1,ModifiedpCi/L50Strontium90905.0Modified/DOERP501Rev.1ModifiedpCi/L2Tritium(H3)906.0ModifiedpCi/L700Note:MDLsarebasedonstandardoperatingproceduresprovidedbyGEL.5.4 EQUIPMENTCALIBRATIONANDDECONTAMINATION Acalibrationverificationoffieldinstrumentswillbeperformeddaily,priortoinitialuseinthefield.Additionalcalibrationmayberequiredifsignsofinstrumentmalfunctionorquestionablereadingsareobserved.CalibrationproceduresareincludedinAttachment3oftheLCRPPR057(AppendixA).

Dedicatedand/ordisposableequipmentwillbeusedwhenpossibletopreventcrosscontamination.Equipmentsuchaswaterlevelindicatorsthatwillbeusedtocollectdatafrommultiplewells,willbedecontaminatedbetweeneachuse.DecontaminationwillbeperformedinaccordancewithAttachment6oftheLCRPPR057.6. QualityControlandDataValidationThecommerciallaboratorysupplyingradiologicalanalyticalservicesshallhavecurrentNationalEnvironmentalLaboratoryAccreditationProgram(NELAP)andWisconsinrequiredcertifications.Thecommerciallaboratory'sQAprogramwillincludeprovisionsforreplicate,methodblank,matrixspike,traceryield,internalstandards,andsurrogatemeasurements.LaboratoryanalyticalreportswillbereviewedtodeterminedatausabilityinaccordancewithguidanceprovidedbytheUSUSEPA.ThefollowingQA/QCcriteriafromtheanalysisoftheprojectsampleswillbeevaluatedasapplicable: SamplePreservationandHoldingTimeCompliance MethodSampleAnalysis BlankSampleAnalysis LaboratoryControlSamples FieldandLaboratoryDuplicates TargetAnalyteIdentification UseofLaboratoryDataQualifiersAnalyticalprecisionandaccuracywillbeevaluatedbasedonlaboratoryduplicateanalysesperformedconcurrentlywiththeprojectsamples.Fieldprecisionwillbeevaluatedbasedonfieldduplicates.

Sampledatashallbequalifiedbythelaboratoryinaccordancewithlaboratorystandardoperatingprocedures(SOPs).Dataqualifiersassignedtoprojectsampleresultsbythelaboratorywillbeappliedto 14thereportedresults.Datawillbeevaluatedtodeterminecompliancewiththedataqualityobjectives(DQOs)andusabilityfortheproject.Allexceptionswillbenotedindatavalidationreports.7. ScheduleandSequenceLaCrosseSolutionsbeganinvestigationactivitiesinadvanceofthe31March2018DNRletter.AsaresultofongoinggroundwatermonitoringconductedaspartoftheD&Deffort,thetritiumreleasetogroundwaterwasidentifiedandreported.Workhasbegunonacalibratedgroundwatermodeltoevaluateiftherewasanypotentialfortritiumtomigratetothedrinkingwatersupplyoroffsite.Thiseffortwascoupledwiththedesignofadyetracerstudytoconfirmthesourceandtocalibratethemodel.PreliminaryresultsindicatetherehasbeennomigrationtoofH3tothesitedrinkingwaterwellsorupgradienttotheresidentialwellsontheothersideofthehighway.

LaCrosseSolutionshasincreasedthesamplingfrequencyofmonitoringwellsMW202AR/B,MW203A/B,MW201A/BandwithapprovalofthisWorkPlantheywillcontinuebimonthlymonitoring,withtheremainingsitewellstobesampledsemiannually.

LaCrosseSolutionswillmeetthefollowingscheduleforremainingtasksasrequiredbytheDNRintheir30March2018letter: Siteinvestigationwillbeinitiatedwithin90daysofsubmittingthisSiteInvestigationWorkPlan.Thefieldinvestigationwillbeginwithin60daysforreceivingDNRapproval. ASiteInvestigationReport(SIR)willbesubmittedtotheDNRwithin60daysoffieldinvestigationcompletionandreceiptoflaboratoryanalyticaldata. ARemedialActionsOptionsReportwillbesubmittedwithin60daysaftersubmittaloftheSIR,ifremediationiswarranted.8. ReportUponreceiptoflaboratorydata,Haley&AldrichwillcompleteaSIR.Thereportwillincludedescriptionsofthefieldprograms,fieldlogs,analyticalresults,andanupdatedCSM.Thiswillincludeevaluationofgroundwaterflowdirectionsandvelocities,andanassessmentofthetritiumplumeattheLACBWRsite.Thereportwillalsoincluderecommendationsforadditionalinvestigations,ifwarranted.ThereportwilldiscussthepotentialimpactsofthetritiumreleaseontheenvironmentandpotentialimpactstobothhumanheathreceptorsviavaporintrusionaswellastheaquaticandbenthicreceptorsintheadjacentMississippiRiver.

15ReferencesDames&Moore,1973.GeotechnicalInvestigationofGeology,Seismology,andLiquefactionPotential,LaCrosseBoilingWaterReactor(LACBWR)nearGenoa,VernonCounty,WisconsinforGulfUnitedNuclearFuelsCorporation,October1973.DPC,1972.EnvironmentalReport,LaCrosseBoilingWaterReactor,FullTermOperatingLicenseStage,DairylandPowerCooperative,LaCrosse,WI,September1972.Haley&Aldrich,Inc.(Haley&Aldrich),2016a.GroundwaterMonitoringReport,20142015;LaCrosseBoilingWaterReactor.April2016.Haley&Aldrich,2016b.HydrogeologicalInvestigationReport,LaCrosseBoilingWaterReactor,DairylandPowerCooperative.Revised24February2016.Haley&Aldrich.2017.GroundwaterMonitoringReport,December2016;LaCrosseBoilingWaterReactor.January2017.LaCrosseSolutions

.2017.RadiationProtection,InstructionNo.LCRPPR057,Revision2,GroundwaterSampling,LaCrosseSolutionsSiteRestorationProject.2April2018.U.S.EnvironmentalProtectionAgency.2010.LowStress(lowflow)PurgingandSamplingProcedurefortheCollectionofGroundwaterSamplesfromMonitoringWells.USEPA-Region1.WisconsinDepartmentofNaturalResources,NR140.Publishedunders.35.93,stats.RegisterJuly2015,No715.WisconsinDepartmentofNaturalResources,March2018.ReportedContaminationatLaCrosseBoilingWaterReactorFacility.30March2018.

TABLES Page 1 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORGROUNDWATER(20142017)LACROSSEBOILINGWATERREACTOR(LACBWR)3455555MWDW306182014MWDW406182014MWDW506182014MWDW509242014DW503252015DW511122015Well512071606/18/201406/18/201406/18/201409/24/201403/25/201511/12/201512/07/2016 0.0538+/-0.08980.0341+/-0.090.00464+/-0.08460.128+/-0.1562.79+/-8.740+/-8.893.97+/-8.760.944+/-7.340.597+/-2.030.346+/-1.490.745+/-2.063.96+/-2.452.17+/-2.80.568+/-3.010.249U+/-2.321.02+/-1.980.394+/-2.172.49+/-2.112.17+/-3.172.37+/-3.520.377+/-2.150.0409U+/-1.509.48+/-12.92.34+/-7.767.42+/-11.22.48+/-20.54.59+/-12.61.51+/-17.95.23+/-4.133.15+/-5.061.34+/-6.023.3+/-7.973.36+/-10.10.26+/-7.182.67+/-4.381.46+/-4.670.154+/-4.422.68+/-4.490.902+/-7.840.438+/-6.760.126+/-1.010.132+/-0.8624.43+/-1.710.847+/-0.7251.06+/-1.150.947+/-1.821.48+/-1.573.13+/-1.651.92+/-2.152.95+/-1.742.09+/-1.641.05+/-2.4220+/-7031.1+/-78.226.6+/-80.29.39+/-77.718.3+/-62.239.6+/-76.947.4+/-87.93.12+/-59.91.77+/-3.826.13+/-3.627.4+/-3.622.79+/-2.8916.4U+/-25.40.44+/-2.130.143+/-1.981.25+/-1.680.945+/-2.041.86+/-2.140.374+/-2.10.0282+/-0.2790.0476+/-0.1720.0221+/-0.1540.0171+/-0.07130.096+/-0.2010.0336+/-0.1720.0313+/-0.160.0928+/-0.123.51+/-17.42.7+/-20.18.39+/-17.63.17+/-9.310.609+/-0.6860.0898+/-0.6580.0898+/-0.5950.0174+/-0.6570.0369+/-0.6580.579+/-0.9060.870U+/-0.8298.27+/-3.487.37+/-3.528.26+/-3.481.54+/-3.14104+/-137159+/-140194+/-14134.2+/-13952.6+/-143104+/-14696.7U+/-133Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 2 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240557B11ARB11ARB11ARWell5052217Well5120717MWDW706182014MWB11AR06182014MWB11AR09242014MWB11AR0325201505/22/201712/07/201706/18/201406/18/201409/24/201403/25/20150.0109+/-0.07660.0837+/-0.1070.0168+/-0.05145.08+/-9.86.83+/-9.840+/-7.010.132U+/-2.081.03U+/-4.121.83+/-2.241.83+/-3.80.972+/-2.180.186+/-2.711.12U+/-2.410.457U+/-4.652.41+/-3.241.93+/-3.731.22+/-1.982.58+/-2.215.5+/-21.11.47+/-21.76.41+/-13.94.68+/-15.74.73+/-5.452.61+/-9.621.1+/-5.624.5+/-7.250.174+/-4.334.46+/-5.541.69+/-4.495.89+/-7.090.378+/-0.9090.733+/-1.60.207+/-1.860.221+/-1.560+/-1.380.269+/-2.360.303+/-1.971.43+/-3.0638.5+/-82.337.5+/-74.234.8+/-77.226+/-65.92.52+/-54.98.49+/-60.618.6U+/-19.714.5U+/-18.14.38+/-3.830+/-3.620.413+/-2.920.748+/-2.351.52+/-3.070.129+/-1.820.985+/-2.130.0822+/-0.1680.0409+/-0.1180.0055+/-0.06430.406+/-0.3310.0339+/-0.1220.0109+/-0.06522.62+/-130.837+/-12.42.29+/-8.270.370U+/-0.6960.25U+/-0.4430.0177+/-0.7250.611+/-0.6331.32+/-0.7353.52+/-0.9249.35+/-3.538.46+/-3.481.56+/-3.188.03U+/-237127U+/-330123+/-139161+/-14234.3+/-13969.4+/-141Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 3 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240B11ARB11ARB11ARB11ARB11ARB11ARB11R MWB11AR11122015B11AR120616B11AR052217B11ARD052217B11AR120517B11ARD120517MWB11R0618201411/12/201512/06/201605/22/201705/22/201712/05/201712/05/201706/18/20140.0122+/-0.06269.06+/-9.662.38+/-2.930.727U+/-1.950.421U+/-1.981.08U+/-2.198U+/-10.50.274U+/-4.931.24+/-2.126.3+/-3.291.72U+/-2.180.214U+/-2.300.690U+/-2.191.94U+/-6.371U+/-5.260.876+/-1.8729.8+/-36.30.993+/-13.40.762+/-4.121.63+/-5.51.69+/-7.931.59+/-4.530.239+/-2.610+/-1.660.0949+/-3.013.59+/-3.0231.8+/-81.34.16+/-55.612.5U+/-23.25.53U+/-16.621.4U+/-22.16.1U+/-17.15.69U+/-17.53.56+/-4.11.22+/-3.250.699+/-1.830+/-0.120.0254+/-0.0925.72+/-9.321.4+/-0.6780.248U+/-0.6091.02U+/-1.011.44U+/-1.010.784UJ+/-0.3960.0335U+/-0.5610.733+/-0.6735.52+/-3.4886.3+/-146367U+/-31693.5U+/-22951U+/-224243U+/-32285.9U+/-337245+/-141Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 4 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240B11RB11RB11RB11RB11RB11RB2 MWB11R09242014MWB11R03252015MWB11R11122015B11R120616B11R052217B11R120517MWB20618201409/24/201403/25/201511/12/201512/06/201605/22/201712/05/201706/18/2014 0.0368+/-0.1080.00398+/-0.07252.7+/-6.971.93+/-100.724+/-2.062.2+/-2.540.562+/-2.79R0.0792U+/-2.811.81U+/-4.061.36+/-2.021.32+/-2.081.04+/-2.71.34+/-2.060.436U+/-2.000.347U+/-2.052.31U+/-5.161.38+/-1.863+/-10.310.5+/-16.96.36+/-14.70.106+/-123.92+/-5.310.782+/-5.421.97+/-6.452.35+/-4.861.94+/-4.612.39+/-6.916.62+/-7.291.6+/-4.723.08+/-1.941.11+/-2.10.267+/-3.12.12+/-3.2314.4+/-4.054.68+/-2.82.26+/-3.6111.2+/-4.9930.9+/-719.2+/-72.916.3+/-66.87.12+/-57.72.47+/-2.983.05U+/-24.312.8U+/-17.44.5U+/-17.67.94+/-3.631.39+/-1.640.556+/-2.320.284+/-2.31.76+/-1.620.0368+/-0.1020.0539+/-0.1420+/-0.1020.034+/-0.09853.68+/-8.840+/-11.81.63+/-0.6420.974+/-0.6822.46+/-0.7770.702U+/-0.4820.993U+/-0.9180.313U+/-0.5720.652+/-0.690.399+/-3.277.41+/-3.440+/-140191+/-139105+/-147322U+/-31869.3U+/-22989.2U+/-331159+/-141Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 5 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240B3MW200AMW200AMW200AMW200AMW200AMWB306182014MW200A06172014MW200A09242014MW200A03242015MW200A11112015MW200A12081606/18/201406/17/201409/24/201403/24/201511/11/201512/08/2016 0.0228+/-0.0660.172+/-0.1790.11+/-0.1332.04+/-10.59.25+/-7.330.455+/-7.092.13+/-2.220.176+/-2.051.71+/-2.731.13+/-3.083.93+/-4.181.29U+/-1.981.13+/-1.771+/-2.023.55+/-2.864.15+/-3.80.653+/-4.121.11U+/-1.8914.2+/-13.19.7+/-14.82.38+/-21.93.51+/-18.44.84+/-28.71.69+/-5.460.576+/-50.657+/-7.9611+/-8.140.816+/-7.73.16+/-4.363.62+/-4.330.816+/-3.912.13+/-7.828.19+/-7.630.645+/-1.834.04+/-1.910.241+/-1.71.05+/-1.820.322+/-2.894.14+/-3.338.65+/-3.882.4+/-3.165.27+/-5.090.964+/-4.4443.9+/-85.619.3+/-74.633.4+/-73.431.4+/-76.521.8+/-687.84+/-66.71.49+/-3.831.97+/-2.863.61+/-2.930.294U+/-23.10.664+/-1.871.08+/-1.751.42+/-2.631.94+/-3.180.59+/-4.270.0829+/-0.1380.0138+/-0.08180.0264+/-0.06350.145+/-0.1920.0267+/-0.08190.0583+/-0.08940.739+/-10.90+/-7.962.22+/-8.040.612+/-0.6710.986+/-0.7232.17+/-0.7480.522+/-0.6442.4+/-0.9191.8U+/-0.9168.09+/-3.413.54+/-3.151.57+/-3.2193+/-14052.3+/-14068.6+/-140155+/-13917.2+/-147469U+/-326Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 6 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW200AMW200AMW200BMW200BMW200BMW200BMW200A052217MW200A120617MW200B06172014MW200B09242014MW200B03242015MW200BD0324201505/22/201712/06/201706/17/201409/24/201403/24/201503/24/20150.37+/-0.2320.229+/-0.2494.84+/-7.484.98+/-6.991.68U+/-2.610.559U+/-5.190.364+/-2.21.94+/-2.82.34+/-2.440.725+/-2.430.176U+/-1.981.24U+/-4.481.26+/-3.10.619+/-2.470.676+/-2.40.388+/-1.8411.5+/-17.113.4+/-19.13.81+/-13.92.24+/-17.40.559+/-7.461.53+/-7.962.98+/-6.580.376+/-7.283.44+/-4.391.64+/-4.22.74+/-6.911.33+/-6.850.226+/-2.122.01+/-1.870.958+/-0.9951.51+/-1.191.79+/-3.429.1+/-3.352.17+/-1.61.66+/-2.5141.6+/-78.445.5+/-75.933.1+/-75.223.7+/-70.82.58U+/-16.50.184U+/-18.34.68+/-3.360.787+/-2.770.847+/-2.480.268+/-2.691.22+/-2.580.332+/-1.970.015+/-0.06280.00649+/-0.0760.0156+/-0.06280+/-0.1054.49+/-6.558.49+/-10.40.567U+/-0.9811.31U+/-0.9350.998+/-0.7581.54+/-0.7312.14+/-0.8133.68+/-15.08+/-3.181.53+/-3.13174U+/-221244U+/-355123+/-14451.7+/-140121+/-141104+/-142Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 7 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW200BMW200BMW200BMW200BMW201AMW201AMW200B11112015MW200B120816MW200B052217MW200B120617MW201A06172014MW201AD0617201411/11/201512/08/201605/22/201712/06/201706/17/201406/17/20140.0945+/-0.1230.03+/-0.07924.83+/-7.470+/-7.061.49+/-2.350.608U+/-1.550.176U+/-2.102.36U+/-3.410.309+/-1.841.13+/-2.250.506+/-2.350.114U+/-1.800.257U+/-2.563.19U+/-3.20.0604+/-1.681.42+/-1.9915.1+/-144.15+/-11.11.41+/-18.40.619+/-6.922.39+/-4.891.15+/-7.852.79+/-6.372.92+/-4.611.75+/-4.341.06+/-3.460.383+/-1.590.636+/-2.165.1+/-4.367.25+/-3.546.75+/-3.1732+/-73.40.717+/-67.616.7+/-60.416.4+/-61.711.2U+/-24.60.622U+/-19.23.58U+/-17.21.81+/-2.721.8+/-2.621.1+/-2.340.373+/-2.030.348+/-2.40.0532+/-0.1150.0739+/-0.08980.00685+/-0.08020.00671+/-0.07850.485+/-6.950+/-8.850.829+/-0.8960.531U+/-0.4851.44U+/-1.140.548U+/-0.8490.0686+/-0.7081.53+/-0.7483.91+/-3.156.95+/-3.352+/-147107U+/-35738.5U+/-233128U+/-34670.2+/-14287+/-141Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 8 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW201AMW201AMW201AMW201AMW201AMW201AMW201AMW201A09242014MW201A03252015MW201A11112015MW201A120816MW201A052317MW201A120617MW201A02011809/24/201403/25/201511/11/201512/08/201605/23/201712/06/20172/1/2018 0.14+/-0.142.69+/-7.061.09+/-2.070.346+/-3.790.388+/-2.380.629U+/-2.602.08U+/-2.952.45U+/-4.140.0723+/-1.853.58+/-3.20.258+/-2.383.57U+/-3.102.05U+/-3.152.8U+/-4.444.79+/-13.210+/-20.510.4+/-11.33.08+/-6.444.57+/-7.382.9+/-7.71.47+/-4.430.338+/-7.790.845+/-6.81.18+/-2.310.873+/-2.483.26+/-2.557.36+/-3.272.37+/-3.783.4+/-4.9521.8+/-7719.8+/-63.94.99+/-2.969.55U+/-24.414.3U+/-19.00.537U+/-180.655+/-1.920.0628+/-3.241.15+/-2.170.0358+/-0.08870+/-0.1170.691+/-100.92+/-0.7160.866+/-0.6621.24+/-0.7050.301U+/-0.6151.47U+/-1.030.343U+/-0.5990.794+/-3.2486.6+/-14152+/-14417.3+/-147375U+/-331115U+/-225192U+/-322264U+/-255Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 9 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW201BMW201BMW201BMW201BMW201BMW201BMW201B06172014MW201B09242014MW201B03252015MW201B11112015MW201B120816MW201B05231706/17/201409/24/201403/25/201511/11/201512/08/201605/23/2017 0.00398+/-0.07260.028+/-0.07774.51+/-6.970.927+/-7.250.62+/-2.071.84+/-2.122.18+/-2.630.067+/-2.772.40U+/-2.651.31U+/-2.111.72+/-1.830.95+/-1.941.46+/-2.110.977+/-2.31.08U+/-2.130.927U+/-2.3611.2+/-12.42.52+/-10.48.2+/-15.112.7+/-15.42.43+/-5.381.93+/-5.490.9+/-7.374.44+/-6.842.6+/-4.384.12+/-4.660.169+/-6.350.269+/-6.651.03+/-2.671.42+/-1.332.25+/-1.760+/-2.931.03+/-3.173.67+/-2.742.77+/-2.630.121+/-4.1415.7+/-72.327.6+/-78.971.1+/-12330.8+/-74.31.91+/-2.782.15+/-2.8210.3U+/-24.53.85U+/-18.91.79+/-1.870.643+/-1.480.208+/-2.231.32+/-2.170.0501+/-0.110.0854+/-0.1280.0236+/-0.09860.141+/-0.1461.41+/-10.10.584+/-8.481.01+/-0.7160.541+/-0.7081.27+/-0.7350.875+/-0.7320.208U+/-0.4741.06U+/-0.8341.17+/-3.061.94+/-3.16105+/-14234.1+/-13717.2+/-14234+/-146123U+/-307106U+/-235Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 10 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW202AMW202AMW202AMW202AMW202AMW202AMW202A06172014MW202A09232014MW202A03242015MW202A11112015MW202A120716MW202AD12071606/17/201409/23/201403/24/201511/11/201512/07/201612/07/2016 0.116+/-0.1180.0662+/-0.1260+/-7.094.94+/-7.140.463+/-2.120.433+/-2.181.68+/-32.1+/-3.241.33U+/-2.620.0139U+/-1.970.891+/-1.660.972+/-1.63.46+/-3.230.236+/-3.42.01U+/-2.652.49U+/-2.644.1+/-119.4+/-12.63.66+/-22.40+/-7.831.11+/-5.460.367+/-5.238.38+/-12.10.635+/-4.361.58+/-4.392.08+/-4.541.96+/-8.131.31+/-7.861.05+/-1.291.03+/-0.5740.106+/-0.860.475+/-1.724.33+/-2.120.486+/-1.561.47+/-1.772.51+/-2.743.26+/-74.754.3+/-8124.8+/-68.311.7+/-65.41.93+/-2.810.824+/-2.944.11U+/-21.50.983U+/-22.20.355+/-1.630.0647+/-1.960.125+/-2.640.926+/-2.80.00846+/-0.09560.0113+/-0.07310.0226+/-0.0910.0586+/-0.09982.19+/-10.50+/-9.651.12+/-0.7551.71+/-0.7410.0945+/-0.7411.21+/-0.810.236U+/-0.6260.430U+/-0.8250.388+/-3.020.797+/-3.29335+/-14951.7+/-138498+/-153174+/-152182U+/-350192U+/-317Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 11 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW202AMW202AMW202AMW202BMW202BMW202BMW202A052317MW202A120717MW202A020118MW202B06172014MW202B09232014MW202B0324201505/23/201712/07/20172/1/201806/17/201409/23/201403/24/20150.0391+/-0.06520.0947+/-0.1214.7+/-7.272.71+/-7.020.143U+/-1.960.896U+/-5.422.86+/-2.362.3+/-2.610.704+/-2.640.0306U+/-2.452.38U+/-4.991.02+/-2.891.17+/-2.980.862+/-2.4610.8+/-17.96.51+/-17.37.32+/-14.41.18+/-2.554.18+/-8.871.09+/-5.783.48+/-4.190.841+/-4.474.96+/-6.540.406+/-1.490.209+/-1.590.553+/-1.41.48+/-2.842.3+/-2.771.4+/-2.5745.4+/-77.933.6+/-76.710.4+/-65.444.6+/-87.317.0U+/-18.42.46U+/-18.13.73+/-2.680.829+/-2.920.104+/-1.991.02+/-2.070.556+/-2.450.148+/-0.1790.0363+/-0.09090.0453+/-0.07290.0524+/-0.08922.72+/-7.871.75+/-8.480.576U+/-0.8180.359U+/-0.5120.604+/-0.7011.57+/-0.7481.04+/-0.7322.72+/-2.890.194+/-3.19113U+/-23911.3U+/-33813200+/-785105+/-143103+/-14152+/-141Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 12 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW202BMW202BMW202BMW202BMW203AMW203AMW202B11112015MW202B120716MW202B052317MW202B120717MW203A06172014MW203A0923201411/11/201512/07/201605/23/201712/07/201706/17/201409/23/20140.0293+/-0.0850.25+/-0.3044.54+/-7.023.95+/-7.644.26+/-4.281.88U+/-2.710.914U+/-2.381.72U+/-5.691.48+/-1.671.55+/-2.531.33+/-4.062.07U+/-3.192.17U+/-1.733.67U+/-4.290.0348+/-1.983.66+/-2.854.37+/-21.80.958+/-9.464.06+/-21.110.5+/-14.21.93+/-6.13.32+/-9.282.16+/-7.534.9+/-4.390.0953+/-4.41.46+/-2.041.74+/-1.051.36+/-1.044.79+/-4.472.26+/-1.741.51+/-1.5649.5+/-75.149.4+/-79.527.1+/-69.253+/-90.82.79U+/-23.116.5U+/-19.00.455U+/-17.53.69+/-2.651.61+/-2.90.253+/-3.951.58+/-1.660.0853+/-2.050.0567+/-0.07470.0708+/-0.1060.0226+/-0.06910.0915+/-0.124.06+/-8.430.504+/-7.331.54+/-0.7920.145U+/-0.6871.30U+/-1.170.39U+/-0.6061.17+/-0.7081.52+/-0.7824.36+/-3.21.23+/-3.370+/-147197U+/-34954.5U+/-236193U+/-320279+/-14634.3+/-138Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 13 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW203AMW203AMW203AMW203AMW203AMW203AMW203A03242015MW203A11112015MW203A120716MW203A052317MW203A120717MW203A02011803/24/201511/11/201512/07/201605/23/201712/07/20172/1/20183.68+/-3.452.32+/-2.540.403U+/-2.930.355U+/-1.891.08U+/-4.462.59+/-3.430.467+/-2.421.34U+/-2.200.0464U+/-1.810.389U+/-5.6223.6+/-24.90.672+/-14.20.997+/-10.52.94+/-5.415.47+/-6.263.09+/-5.191.39+/-0.8030.819+/-1.63.87+/-1.891.26+/-3.21

1.09U+/-25.216.0U+/-20.27.03U+/-17.80.0209+/-3.331.67+/-2.05

0.177+/-0.6651.37+/-1.31.01U+/-0.8340.44U+/-1.030.517U+/-0.52634.7+/-142104+/-150303U+/-3406.35U+/-22713000+/-87424200+/-1040Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 14 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW203BMW203BMW203BMW203BMW203BMW203BMW203B06172014MW203B09232014MW203BD09232014MW203B03242015MW203B11112015MW203BD1111201506/17/201409/23/201409/23/201403/24/201511/11/201511/11/2015 0.0763+/-0.09790.102+/-0.1240.00498+/-0.05644.54+/-7.030.489+/-7.642.74+/-7.091.38+/-2.570.683+/-1.920.335+/-2.921.65+/-2.640.0708+/-2.712.83+/-2.590.955+/-2.821.99+/-1.841.21+/-2.650.949+/-2.480.613+/-2.562.15+/-2.314.98+/-21.51.15+/-12.34.86+/-18.49.69+/-123.14+/-16.910.8+/-18.33.69+/-7.710.231+/-5.181.53+/-7.340+/-7.552.96+/-4.191.28+/-6.614.04+/-4.440.365+/-3.814+/-4.136.5+/-6.462.79+/-6.321.5+/-6.230.228+/-2.140.668+/-20.785+/-1.541.09+/-1.023.32+/-2.681.41+/-2.425.53+/-2.991+/-3.022.4+/-2.631+/-2.223.04+/-4.830.386+/-4.1649.5+/-73.243.2+/-74.528.4+/-80.24.66+/-56.143.4+/-90.82.7+/-613.8+/-2.731.77+/-3.13.1+/-2.861.5+/-2.332.16+/-1.920.565+/-2.320.806+/-1.571.51+/-2.280.947+/-2.320.0586+/-0.1280.0812+/-0.1130.0264+/-0.1060.0394+/-0.1250.0596+/-0.09150.00882+/-0.10310.2+/-13.63.71+/-8.926.33+/-130.822+/-0.6711.91+/-0.7651.93+/-0.7341.12+/-0.6820.737+/-0.7811.21+/-0.8234.16+/-3.193.32+/-3.161.37+/-3.21278+/-145121+/-14268.7+/-140139+/-140153+/-143120+/-145Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 15 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW203BMW203BMW203BMW204AMW204AMW204AMW203B120716MW203B052317MW203B120717MW204A06172014MW204A09232014MW204A0324201512/07/201605/23/201712/07/201706/17/201409/23/201403/24/20150.155+/-0.149,0.0362+/-0.09550.105+/-0.1154.65+/-7.190.473+/-7.392.13U+/-3.720.161U+/-2.800.562U+/-3.30.303+/-2.021.14+/-2.490.633+/-4.542.40U+/-2.632.19U+/-2.641.54U+/-4.270.19+/-3.230.377+/-2.420.23+/-4.162.11+/-18.319.2+/-18.219.1+/-23.62.36+/-8.674.94+/-8.18.09+/-12.20.433+/-4.282.02+/-4.492+/-5.320.758+/-1.960.599+/-1.660.978+/-1.52.68+/-2.985.28+/-2.2110.9+/-3.0640.3+/-79.234.5+/-75.36.22+/-59.131.2+/-74.811.7U+/-25.75.62U+/-17.25.67U+/-17.40+/-2.750.183+/-2.60.225+/-10.118+/-2.460.241+/-3.760.0512+/-0.1150.000645+/-0.06850.0248+/-0.07570.00548+/-0.06414.07+/-8.443.97+/-8.170.210U+/-0.5930.287U+/-0.7960.256U+/-0.5382+/-0.6751.94+/-0.7344.52+/-1.076.95+/-3.31.95+/-3.18297U+/-335101U+/-24113.1U+/-338105+/-14368.7+/-14052+/-141Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 16 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW204AMW204AMW204AMW204AMW204BMW204BMW204A11112015MW204A120716MW204A052217MW204A120617MW204B06172014MW204B0923201411/11/201512/07/201605/22/201712/06/201706/17/201409/23/20140.0824+/-0.1460.268+/-0.35112.9+/-10.2,4.61+/-7.130.946+/-7.394.4+/-5.413.09U+/-3.172.7U+/-3.511.72U+/-5.241.92+/-2.24,2.46+/-2.151.24+/-2.092.52+/-3.460.909U+/-2.680.666U+/-3.020.771U+/-5.630.231+/-1.83,0.665+/-1.82.05+/-2.110+/-12.27.67+/-11.1,4.91+/-10.42.23+/-12.81.27+/-12.80.605+/-6.39,3.23+/-5.892.36+/-5.61.39+/-8.051.66+/-4.52,0.45+/-4.20.945+/-4.761.97+/-2.621.26+/-2.15,1.92+/-3.213.52+/-2.0311.1+/-4.570.256+/-4.48,1.25+/-4.090+/-3.398.68+/-68.2,3.98+/-78.792.5+/-89.824.7+/-71.8,22+/-65.718.6+/-6711.3U+/-23.611.6U+/-20.37.5U+/-17.81.97+/-2.86,1.95+/-2.840.393+/-2.791.52+/-2.091.28+/-1.65,0.511+/-0.6241.88+/-1.760.00928+/-0.108,0.0143+/-0.0920.0326+/-0.08060.0627+/-0.157,0.0381+/-0.09420.0701+/-0.1071.89+/-9.01,6.16+/-9.996.46+/-10.30.76+/-0.7030.428U+/-0.9580.463U+/-1.180.38U+/-0.5950.61+/-0.637,0.355+/-0.6811.26+/-0.7416.3+/-3.25,4.96+/-3.220.389+/-3.217.2+/-147206U+/-34022.4U+/-236211U+/-35634.9+/-140,139+/-142120+/-136Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 Page 17 of 17SUMMARYOFRADIOLOGICALANALYTICALRESULTSFORLACROSSEBOILINGWATERREACTOR(LACBWR)Notes:1RegulatorycriteriafromNR140.10SubchapterII2USEPAMCLS,40CFRPart141#ResultbetweenDetection&QuantificationLimitNotAnalyzedAMatrixSpikeRecoveryoutsidecontrollimitsJValueisestimated RResultisrejectedNANotApplicablepCi/LpicoCuriesperliterUNotdetectedabovelaboratoryreportinglimitExceedsoneormoreregulatorycriteriaExceedDNRTable2PublicWelfareGroundwaterQualityStandardsonly.Shadedcellsindicateduplicateanalyses.TABLE1GENOA,WISCONSINLocationSampleIDSampleDateRadiological(pCi/L)Americium241Carbon14Cesium137Cobalt60Europium152Europium154Europium155GrossAlphaAnalytesGrossBetaAnalytesIron55Plutonium241Strontium90Technetium99TritiumNickel59Nickel63Niobium94Plutonium238Plutonium239/240MW204BMW204BMW204BMW204BMW204BMW204B03242015MW204B11112015MW204B120716MW204B052217MW204B12061703/24/201511/11/201512/07/201605/22/201712/06/20171.87+/-3.734.15+/-3.090.257U+/-2.600.721U+/-2.410.793U+/-3.772.63+/-3.780.162+/-2.530.0975U+/-2.110.0548U+/-1.951.96U+/-4.737.43+/-28.18.74+/-10.90.428+/-11.81.76+/-6.921.87+/-7.283.68+/-6.730.537+/-2.883.65+/-3.41.8+/-3.6415+/-6.28

2.04U+/-24.66.34U+/-17.34.95U+/-16.10.0185+/-1.662.3+/-2.03

0.654+/-0.7281.25+/-0.7450.719U+/-0.6521.00U+/-0.9080.937U+/-0.801120+/-14017.3+/-147453U+/-327124U+/-228179U+/-325Haley&Aldrich,Inc.X:\128924LACBWR\Deliverables\SiteInvestigationWorkPlan\Tables\20180507HAIGWQualityTable1.xlsx5/22/2018 FIGURES

GATEGATEGATEGATEGATEGATEGATEGATEGATEGATEGATE62562562563063063063063563563563564064064064064064064064064064064064062162162162163763763763863863863863863863863863863863863963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963963964118" MAPLE 8" CRAB APPLE12" CRAB APPLEPIV-21TRANSMISSION TOWERELEVATED IRON WALK MISSISSIPPI RIVER (Shoreline Located 11-15-2012 Water Elevation 620.55')

ELEVATED IRON WALK IRON WALL GrassCollection BasinBeam Bases For Overhead Track TRANSMISSION STR.TRANSMISSION TOWERPAD FORDIESEL GENERATOR ELEC.BASINWellNo.5639640636637638638635621625625630Edge of Water Edge of Water CONCRETE TANK PEDESTALS SQUARE MANHOLEMW200AMW200BMW201AMW201BMW202AMW202BMW204BMW204AMWB11RMWB11ARMW203AMW203BREACTORBUILDINGFLOW DIRECTION BLOCK WALL SWITCH YARD ADMINISTRATIVE BUILDINGDOCKG3 CRIB HOUSE DOCKDOCKSTACK5437100 FT. SOUTH J:\GRAPHICS\42278\42278-001-B012.DWG ERVIN, DAYNA B0121/16/2018 11:00 AMLayout:

Printed:FIGURE LACBWRLACROSSESOLUTIONS GENOA, WISCONSIN SITE PSCALE: AS SHOWN 060120SCALE IN FEET DESIGNATION AND APPROXIMATE LOCATION OF MONITORING WELL IN DEEP AQUIFER MINOR ELEVATION CONTOUR LINE MAJOR ELEVATION CONTOUR LINE

LIGHT POLE TRANSMISSION LINE STRUCTURE GUY/STUB POLE NOTES1.ALL LOCATIONS AND DIMENSIONS ARE APPROXIMATE.2.BASE PLAN CREATED FROM PLAN TITLED "TOPOGRAPHIC/SITE SURVEY, DAIRYLAND POWER COOPERATIVE, LACBWR, GENOA, WISCONSIN", DATE 26 NOVEMBER 2012, BY LAMPMAN & ASSOCIATES, OF DE SOTO, WISCONSIN.3.DOMESTIC WELL LOCATIONS DIGITIZED FROM PLAN TITLED "LACBWR SITE GROUNDWATER WELLS, GENOA, WI",

DRAWING 14052187.A, DATED 20 MAY 2014, PREPARED BY

ENERGYSOLUTIONS AND SHOULD BE CONSIDERED APPROXIMATE.

MW200AMW200B640639ANCHORELECTRIC PEDESTAL SECURITY CAMERA ON PEDESTAL MAN HOLESTORM INLET HYDRANTWATER VALVE CHAIN-LINK FENCE LEGENDDESIGNATION AND APPROXIMATE LOCATION OF MONITORING WELL IN SHALLOW AQUIFER 3DESIGNATION AND APPROXIMATE LOCATION OF DOMESTIC WELL DEMOLISHED BUILDING GATEGATEGATEGATEGATEGATEGATEGATEGATEGATEGATE18" MAPLE 8" CRAB APPLE12" CRAB APPLEPIV-21TRANSMISSION TOWERELEVATED IRON WALK MISSISSIPPI RIVER (Shoreline Located 11-15-2012)

ELEVATED IRON WALK IRON WALL GrassCollection BasinBeam Bases For Overhead Track TRANSMISSION STR.TRANSMISSION TOWERPAD FORDIESEL GENERATOR ELEC.BASINWellNo.5Edge of Water Edge of Water CONCRETE TANK PEDESTALS SQUARE MANHOLEREACTORBUILDINGCONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.GRVL.GRVL.GRVL.GRVL.CONC.CONC.GRVL.GRVL.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.FLOW DIRECTION BLOCK WALL SWITCH YARD ADMINISTRATIVE BUILDINGDOCKG3 CRIB HOUSE DOCKDOCKSTACKMW200AMW200BMW201AMW201BMW202AMW202BMW204BMW204AMWB11RMWB11ARMW203AMW203B622.95622.95622.55622.86623.09625.21625.0624.8624.6624.4624.2624.0623.8623.6623.4623.2622.8622.6623.0J:\GRAPHICS\42278\42278-001-B013.DWG ERVIN, DAYNA B0131/18/2018 1:21 PMLayout:

Printed:FIGURE 3LACBWRLACROSSESOLUTIONS GENOA, WISCONSIN GROUNDWATER CONTOURS SHALLOW AQUIFER 2017SCALE: AS SHOWN 060120SCALE IN FEET DESIGNATION AND APPROXIMATE LOCATION OF MONITORING WELL IN DEEP AQUIFER INFERRED GROUNDWATER CONTOUR NOTES1.ALL LOCATIONS AND DIMENSIONS ARE APPROXIMATE.2.BASE PLAN CREATED FROM PLAN TITLED "TOPOGRAPHIC/SITE SURVEY, DAIRYLAND POWER COOPERATIVE, LACBWR, GENOA, WISCONSIN", DATE 26 NOVEMBER 2012, BY LAMPMAN

& ASSOCIATES, OF DE SOTO, WISCONSIN.3.WELL MW200A WAS NOT USED IN PREPARATION OF THE GROUNDWATER CONTOURS DUE TO ANOMALOUS WATER LEVEL READING MW200AMW200BLEGENDDESIGNATION AND APPROXIMATE LOCATION OF MONITORING WELL IN SHALLOW AQUIFER INFERRED GROUNDWATER FLOW DIRECTION CONCRETE SURFACE OR CONCRETE PAD GRAVEL SURFACE

BITUMINOUS SURFACE 622.5CONC.GRVL.BTMN.INDICATES GROUNDWATER ELEVATION (IN FEET)

OBSERVED ON 22 MAY 2017 625.57DEMOLISHED BUILDING GATEGATEGATEGATEGATEGATEGATEGATEGATEGATEGATE18" MAPLE 8" CRAB APPLE12" CRAB APPLEPIV-21TRANSMISSION TOWERELEVATED IRON WALK MISSISSIPPI RIVER (Shoreline Located 11-15-2012)

ELEVATED IRON WALK IRON WALL GrassCollection BasinBeam Bases For Overhead Track TRANSMISSION STR.TRANSMISSION TOWERPAD FORDIESEL GENERATOR ELEC.BASINWellNo.5Edge of Water Edge of Water CONCRETE TANK PEDESTALS SQUARE MANHOLEREACTORBUILDINGCONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.CONC.GRVL.GRVL.GRVL.GRVL.CONC.CONC.GRVL.GRVL.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.BTMN.FLOW DIRECTION BLOCK WALL SWITCH YARD ADMINISTRATIVE BUILDINGDOCKG3 CRIB HOUSE DOCKDOCKSTACKMW200AMW200BMW201AMW201BMW202AMW202BMW204BMW204AMWB11RMWB11ARMW203AMW203B623.22623.01622.68622.58622.73623.2623.0622.8622.6J:\GRAPHICS\42278\42278-001-B014.DWG ERVIN, DAYNA B0141/18/2018 1:19 PMLayout:

Printed:FIGURE LACBWRLACROSSESOLUTIONS GENOA, WISCONSIN GROUNDWATER CONTOURS DEEP AQUIFER 2017SCALE: AS SHOWN 060120SCALE IN FEET DESIGNATION AND APPROXIMATE LOCATION OF MONITORING WELL IN DEEP AQUIFER INFERRED GROUNDWATER CONTOUR NOTES1.ALL LOCATIONS AND DIMENSIONS ARE APPROXIMATE.2.BASE PLAN CREATED FROM PLAN TITLED "TOPOGRAPHIC/SITE SURVEY, DAIRYLAND POWER COOPERATIVE, LACBWR, GENOA, WISCONSIN", DATE 26 NOVEMBER 2012, BY LAMPMAN

& ASSOCIATES, OF DE SOTO, WISCONSIN.

MW200AMW200BLEGENDDESIGNATION AND APPROXIMATE LOCATION OF MONITORING WELL IN SHALLOW AQUIFER INFERRED GROUNDWATER FLOW DIRECTION CONCRETE SURFACE OR CONCRETE PAD GRAVEL SURFACE

BITUMINOUS SURFACE 622.5CONC.GRVL.BTMN.INDICATES GROUNDWATER ELEVATION (IN FEET)

OBSERVED ON 22 MAY 2017 626.10DEMOLISHED BUILDING

!?#!?#!?#!?#!?#!?#!?#!?#!?#!?#!A!A!A!A!?#!?#Estimated Groundwater PlumeSource AreaMW203BMW201AMW202BMW203AMW204AMW204BMW200AMW200BMW201BMW202AWELL5WELL4WELL7WELL3MWB11RMWB11ARNOTES GROUNDWATER AY LEGEND!A!?#

APPENDIXALCRPPR057RevisionNo.2

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 2 of 48 TABLE OF CONTENTS 1. PURPOSE AND SCOPE .......................................................................................................5 Purpose ........................................................................................................................5 1.1. Scope ...........................................................................................................................5 1.2.2. REFERENCES .......................................................................................................................6 None ............................................................................................................................6 2.1.3. GENERAL ..............................................................................................................................6 Background .................................................................................................................6 3.1.4. REQUIREMENTS AND GUIDANCE ................................................................................7 Method summary ........................................................................................................7 4.1. Interferences and potential problems ..........................................................................8 4.2. Purging ........................................................................................................................8 4.3. Materials .....................................................................................................................8 4.4. Equipment ...................................................................................................................9 4.5. Reagents ....................................................................................................................10 4.6. Procedures .................................................................................................................10 4.7. Well Inspection .........................................................................................................12 4.8. Water-Level Measurement........................................................................................12 4.9. Well Purging .............................................................................................................12 4.10. Groundwater Sample Collection ...............................................................................12 4.11. Recording of Information .........................................................................................13 4.12. Sample Containers and Preservatives .......................................................................14 4.13. Quality Control Samples ...........................................................................................14 4.14. Sample Documentation .............................................................................................14 4.15. Personnel Qualifications ...........................................................................................15 4.16. Health And Safety .....................................................................................................15 4.17. Quality Assurance/Quality Control...........................................................................15 4.18.5. Attachments ..........................................................................................................................15 Attachment 1 LACBWR Monitoring Well Map ...................................................15 5.1. Attachment 2 Low Flow Purge .................................................................................15 5.2. Attachment 3 Equipment Calibration .......................................................................15 5.3. Attachment 4 Manual Water Level Measurement ....................................................15 5.4. Attachment 5 Sample Management ..........................................................................15 5.5.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 3 of 48 Attachment 6 Equipment Decontamination ..............................................................15 5.6.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 4 of 48 Summary of Changes to Rev 1: 1.) Minor formatting that did not affect the technical content of this document. 2.) Minor clarifications and addition of (5) existing Work Instructions over use of Work Instructions versus Procedures for groundwater sampling. Summary of Changes to Rev 2: 1.) Added details to identify replacement wells. 2.) Minor formatting that did not affect the technical content of this document.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 5 of 48 1. PURPOSE AND SCOPE Purpose 1.1.1.1.1 The purpose of this procedure is to provide general guidance and direction on the proper procedures for sampling groundwater wells at the LACBWR site. This samples from the saturated zone of the subsurface. The goal is to collect samples that are representative of the particular zone of water being sampled at the time of collection. This instruction and its appendices are to be used in conjunction with analyses for groundwater constituents (e.g., radionuclides). Scope 1.2.1.2.1 This procedure is to be used by field samplers and others associated with performing field investigations at the LACBWR facility. It applies to the collection and handling of groundwater samples from monitoring wells. It addresses the specific activities to be performed prior to going to the field and upon arrival at each sampling location. This instruction also explains the process of groundwater sample collection, preparation or collection of quality control/quality assurance (QA/QC) samples, and sampling event documentation. 1.2.2 Guidelines for purging monitor wells using a low-flow purge method are presented in Attachment 2, Instruction for Low-Flow Purge. 1.2.3 Maintenance and calibration of sampling equipment are described in Attachment 3, Equipment Calibration. 1.2.4 The process for accurately determining the measurement of water levels is detailed in Attachment 4, Manual Water-Level Measurement. 1.2.5 Chain-of-Custody protocols for sample shipment to analytical laboratories are provided in Attachment 5, Sample Management. 1.2.6 Decontamination of sampling equipment is described in Attachment 6, Equipment Decontamination. 1.2.7 Sample containers and preservatives for water samples are described in Table 1-1.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 6 of 48 TABLE 1-1 SAMPLE CONTAINER, PERSERVATION, SHIPPING AND PACKAGING REQUIREMENTS FOR GROUNDWATER SAMPLING Analysis Sample Containers per Analysis Preservation Maximum Holding Time from Sample Collection Volume of Sample Shipping Tritium (H3) 1 L glass bottle or equivalent Ambient Temperature 180 days Fill to neck of bottle Overnight or hand deliver Strontium-90 1 L glass bottle or equivalent Ambient Temperature 180 days Fill to neck of bottle Overnight or hand deliver Cobalt-60 1 L glass bottle or equivalent Ambient Temperature 180 days Fill to neck of bottle Overnight or hand deliver Cesium-137 1 L glass bottle or equivalent Ambient Temperature 180 days Fill to neck of bottle Overnight or hand deliver HTDs 1 L glass bottle or equivalent Ambient Temperature 180 days Fill to neck of bottle Overnight or hand deliver HTDS = HARD-TO-DETECT RADIONUCLIDES: CARBON-14, IRON-55, NICKEL-59/63, TECHNETIUM-99, 2. REFERENCES None 2.1.3. GENERAL Background 3.1.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 7 of 48 3.1.1 Haley & Aldrich, Inc. (Haley & Aldrich) was contracted by Dairyland Power Cooperative (DPC) to develop a Hydrogeological Conceptual Site Model (CSM) of the La Crosse Boiling Water Reactor (LACBWR) site located near Genoa, Wisconsin. The purpose of the CSM was to acquire a better understand of both the hydrogeological setting of LACBWR as well as past operations that could have released site-related radiological constituents to the environment. 3.1.2 The Hydrogeological CSM was the first action involved in understanding both groundwater flow regimes as well as groundwater quality, with respect to radionuclides associated with LACBWR. The CSM was then used to identify data gaps that were used to develop a focused investigation to better define the hydrogeology. 3.1.3 At LACBWR, groundwater flows in a westerly direction from the bluffs on the east towards the river. Under typical river stage, groundwater gradients near the river are slightly upward; however, the vertical gradient reverses during flood stages. The geological and historic river stage data also suggests that the shallow aquifer is in direct hydraulic communication with the river and the river stage impacts the water table elevation. 3.1.4 Historic operations may potentially have released radionuclides to the environment. Generally, most of the potential releases are associated with the waste collection system in the Turbine Building, in which, radioactive liquid waste was collected by floor drains, pumped into wastewater tanks and then batch released into the circulating water line. In the late 1970s, voids were characterized below the building mostly in the northeast below the laundry area. When the voids were grouted, grout then entered the floor drains, plugging them. These data raise questions on the integrity of the Turbine Building subsurface floor drains. Other Areas of Interest (AOIs) include the Underground Gas Storage Tank Vault and Piping and the Contaminated Water Release Area. Based upon construction and the fact that there are not buried pipes, the soils and groundwater below the Reactor Building are not likely to be impacted. 3.1.5 Based upon the CSM and monitoring wells that Haley & Aldrich developed and installed, this procedure provides direction on the proper techniques to be used for groundwater sampling. 3.1.6 During 2018, two monitoring wells have been replaced due to significant damage, which negated their ability to continue to be used as monitoring wells. The wells that were replaced included MW-201B and MW-202A. The new wells were located within five feet of the abandoned wells and have the numbers MW-201BR and MW-202AR. 4. REQUIREMENTS AND GUIDANCE Method summary 4.1.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 8 of 48 To obtain a representative groundwater sample for radiological analysis, it is important that the sample is formation water, originating from outside the well. This can be accomplished either by purging the complete volume of water in the borehole/casing one to three times, or alternatively, by purging the well at a rate approximately equal to recovery (i.e., low-flow purge). Pumping at a rate near or slightly greater than well capacity minimizes drawdown, and ensures that water will be pumped from the aquifer adjacent to the pump or tubing intake. Mixing of water from the borehole, above or below the intake, is minimized or eliminated in this manner. In the low-flow method to be used at LACBWR, the well is purged at the low-flow rate until a specified set of parameters (pH, temperature, specific conductance, dissolved oxygen, turbidity, oxidation reduction potential) are stabilized or up to three well volumes or four hours (whichever is achieved first) if parameters have not stabilized. At that point, samples are collected from the pump discharge. Interferences and potential problems 4.2.4.2.1 General The primary goal in performing groundwater sampling is to obtain a representative sample of the groundwater aquifer. Field personnel can compromise analysis in two primary ways: (1) taking an unrepresentative sample or (2) by incorrect handling of the sample. Purging 4.3.In a non-pumping well, there may be little or no vertical mixing of the water and stratification may occur. Mixing may occur in the screened or open section of a well, but the well water above the screened or open section may remain isolated, become stagnant, and may not be representative of the groundwater. A non-representative sample can result from excessive pre-pumping of the monitoring well. Excessive pumping could dilute or increase the constituent concentrations from what is representative of the sampling point of interest. To safeguard against collecting non-representative stagnant water, the following guidelines and techniques should be adhered to during sampling: As a general rule, monitor wells will be purged prior to sampling. Purging until the parameters have stabilized is recommended for a representative sample. When purging, the pump should generally be set at the approximate mid-point of the saturated screened interval, or saturated open borehole. The flow rate for pumped wells should be maintained at a rate that is approximately equal to the recharge rate of the well by following the procedures described in Attachment 2. Materials 4.4.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 9 of 48 Equipment used in multiple wells should be decontaminated in accordance with Attachment 6 between uses. Disposable or dedicated equipment should be employed when practicable to help reduce the likelihood of cross-contamination. Materials made from Teflon are considered the optimal material for use in sample tubing and other flexible components of groundwater sampling equipment. For rigid components, stainless steel is considered the optimum material of construction. Other materials may also be deemed appropriate for sampling apparatus. Equipment 4.5.Planning for a sampling event entails assessing, selecting, and assembling the equipment, instruments, and supplies necessary to perform the work. Prior to going to the field, instrumentation shall be assembled, calibrated in a manner consistent with Attachment 3 and manufacturers recommendations (if applicable), and tested. Listed below are types of equipment, instruments, and supplies that may be used for groundwater sampling from LACBWR wells: Water-level indicator, 0.01 feet accuracy Discharge piping or tubing Flow meter or calibrated vessel Bladder pump, peristaltic pump, or small submersible centrifugal pump Pump controllers (Variable Frequency Drive, Peristaltic, and Bladder Pump controllers) for low-flow sampling pumps Compressed gas cylinder or oil-less compressor for bladder-pump operation Generator for Variable Frequency Drive style low-flow pump operation Twin-line Teflon-lined polyethylene tubing Flow cell for measurement of groundwater parameters Multi-parameter instrument Turbidity Meter Air-hoses, couplers and adaptors, as needed Tools necessary for set-up and field maintenance of pumping equipment Fuel for generator or compressor Calibrated vessel or flow meter to measure water volume purged LC-RP-PR-057 Groundwater Sampling Revision 2 Page 10 of 48 Labeled containers (e.g., drums and/or tanks) for purged well water, if needed Personal Protective Equipment (PPE), including nitrile gloves and safety glasses Measuring tape Sample containers and preservatives supplied by the laboratory Coolers for samples Keys to well box locks Cellular phone and/or radio to communicate with project managers and other field staff Watch with a stopwatch function Calculator Pen or marker with indelible ink Chain-of-Custody forms Custody seals Instrument calibration supplies and forms (see Attachment 3) Manual water-level measurement supplies (see Attachment 4) Sample collection, labeling and documentation supplies (see Attachment 5) Decontamination supplies (see Attachment 6) Safety Data Sheets (SDS) Health and Safety Plan (HASP) Reagents 4.6.Reagents may be used for preservation of samples and for decontamination of sampling equipment. The preservatives required are specified by the analysis to be performed, and summarized in Attachment 5. The analytical laboratory that will perform the sample testing should provide the reagents required for sample containers. Decontamination solutions are specified in Attachment 6, Equipment Decontamination. Procedures 4.7.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 11 of 48 This procedure addresses the specific activities to be performed to accomplish a groundwater sampling event or round at the LACBWR site. The procedure includes: Preparation of a delivery order for analytical laboratory services Procurement of equipment and supplies Field inspection of wells to be sampled Well water-level measurement Well purging and measurement of field parameters Groundwater sample collection Field documentation requirements 4.7.1 Schedule A complete set of groundwater samples will be taken twice per year at times when groundwater conditions are representative of the LACBWR norm. The tentative scheduled sampling activities should be during the months of May-June and November-December and continue until the conditions of the License Termination plan are fulfilled. 4.7.2 Preparation In preparation for a groundwater sampling event, the field sampler shall review the following information: Identification number(s) of the well(s) to be sampled Locations of the wells Well location access requirements (e.g., locked gates, road conditions) Field data recording requirements Field and analytical parameters to be tested Type and number of sample containers needed Volume of sample required for analysis Type and number of QA/QC samples to be collected (e.g., duplicates, splits, and blanks) Anticipated weather conditions LC-RP-PR-057 Groundwater Sampling Revision 2 Page 12 of 48 Type of equipment needed for the scheduled sampling activity A well location map and summaries of well completion data and pump specifications are available for field reference. A request for sample containers, which specifies the sample media, number of samples, and analytical parameters to be tested shall be prepared with sufficient advance notice and forwarded to the offsite analytical laboratory to complete the analyses. The analytical laboratory, in accordance with the sampling schedule and the sample volume requirements, will provide sample containers, preservatives, and quality control samples, as requested. Equipment shall be calibrated according to Attachment 3 and the equipment Well Inspection 4.8.Prior to sampling a well, its condition shall be inspected and recorded. Signs of vandalism, unauthorized entry, settlement, or ponding around the well shall be documented, along with the well identification number and the date. Water-Level Measurement 4.9.The depth to water shall be measured from the well reference point in accordance with Attachment 4, Manual Water-Level Measurement. The water level shall be recorded to the nearest 0.01 foot along with the time of day when the measurement was obtained. Well Purging 4.10.Wells will generally be purged according to the process described in Attachment 2, Low Flow Purge. Groundwater Sample Collection 4.11.Samples collected from dedicated pump systems (low-flow or submersible) will be collected from the pump discharge in accordance with Attachment 2. For low-flow purge systems, the sample point is prior to the flow cell. Water samples cannot pass the in-line parameter flow cell and associated plumbing before sampling. For wells with submersible pumps, the sample point is prior to the flow meter and any flow control valves. The wells shall be minimally sampled for Co-60, Cs-137, Ni-63, H-3, and Sr-90 and analyses performed for same at an approved off site lab. Whenever feasible, samples should be collected in the following recommended sampling order by sample type:

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 13 of 48 1. Equipment rinse blank samples, if applicable 2. Primary samples 3. Matrix duplicate samples, if applicable 4. Field duplicate samples 5. Field split samples, if applicable 6. Field blank samples, if applicable Prior to placement into the cooler, each sample should be double-checked to make certain it is properly identified and appropriately labeled. Sample handling, labeling, and transportation are discussed in Attachment 5. Recording of Information 4.12.Relevant information pertaining to field activities should be recorded on a regular basis. In order to avoid the potential to not document important information, the record should be in plain sight near the work area and be readily accessible so that observations, readings, and other pertinent information can be easily recorded whenever possible. Observations and other information should be recorded as soon as practicable, or at a minimum, a brief note and the time recorded for later elaboration. The types of information to be recorded may include: Arrival and departure times at the site and at individual wells. Dates should be recorded in the format MM/DD/YY. Times should be based on a 24-hour military type format for the given time zone (Central Standard Time or Central Daylight Time). For example, 8:45 a.m. should be recorded as 0845. The time 2:45 p.m. should be recorded as 1445. Information regarding instrument calibrations and the calibration standards used Depth to water Damage or concerns regarding wells or access Method and equipment used to purge wells Pump depths Method and equipment used to collect samples Groundwater parameters Purge volumes, times and estimated flow rates LC-RP-PR-057 Groundwater Sampling Revision 2 Page 14 of 48 Dates, times and volumes of samples collected Decontamination procedures, if required Times and names of visitors on the site and their purpose Problems or potential problems with equipment Potential health or safety issues that may require revision to the HASP Accidents or injuries Sample Containers and Preservatives 4.13.Requirements for groundwater sample containers, preservation requirements, and holding times are addressed in Table 1-1. Quality Control Samples 4.14.For each sampling event, additional samples are required for quality assurance and quality control (QA/QC) purposes. Quality assurance and quality control samples shall be collected, preserved, and handled at the same time and in the same manner as the other groundwater samples collected. The various types of QA/QC samples are discussed in Attachment 5. Sample Documentation 4.15.4.15.1 Chain of Custody The appropriate sample custody documentation shall be completed in accordance with Attachment 5, Sample Management. Entries on the Chain-of-Custody form shall be entered using indelible ink. Identified errors shall be lined out with a single line, initialed, and dated. Chain-of-Custody forms shall be fully completed, with applicable blocks having entries and the signatures of samplers and recipients. An example Chain-of-Custody form is presented in Attachment 5. 4.15.2 Field Activities Record The groundwater samples collected from each well, along with the QA/QC samples prepared or collected, shall be identified in the field record. The field sampler shall be responsible for completing the entries. The record shall be submitted to the project manager for review and kept in the project file. 4.15.3 Well Conditions Any observations by the sampler on the condition of the well pad, well vault, well seal or downhole equipment should be noted on the Groundwater Monitoring Report form in Attachment 4 and the field sampling record in Attachment 5.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 15 of 48 Personnel Qualifications 4.16.Field samplers shall obtain the following site specific training prior to engaging in field collection activities. LACBWR Site Restoration Project NGET LACBWR Site Restoration Project Radiation Worker Training LACBWR Site Restoration Project Radiation Worker Practical Factors In addition, field personnel should be trained in the appropriate methods before initiating the procedure alone. Health And Safety 4.17.Site personnel shall comply with the site Health and Safety Plan and Appendices A through E of this Work Instruction. Potential health and safety concerns include working with compressed gases, compressed gas cylinders, fueling air-compressors or generators, pH buffers and standard solutions, non-phosphate detergent, and decontamination liquid waste. Quality Assurance/Quality Control 4.18.The following general quality assurance/quality control (QA/QC) procedures apply: Pertinent data and activities will be recorded. Equipment will be calibrated and operated in accordance with operating instructions as supplied by the manufacturer. 5. ATTACHMENTS Attachment 1 LACBWR Monitoring Well Map 5.1. Attachment 2 Low Flow Purge 5.2. Attachment 3 Equipment Calibration 5.3. Attachment 4 Manual Water Level Measurement 5.4. Attachment 5 Sample Management 5.5. Attachment 6 Equipment Decontamination 5.6.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 16 of 48 ATTACHMENT 1 LACBWR MONITORING WELLS LC-RP-PR-057 Groundwater Sampling Revision 2 Page 17 of 48 Attachment 2 Low Flow Purge 1. SCOPE AND APPLICATION The purpose of this Work Instruction is to provide guidelines and direction for the purging of LACBWR monitor wells using the low-flow method. Generally, purging of wells will be conducted based on U.S. Environmental Protection Agency guidelines described in Low-Flow (Minimal Drawdown) Ground-water Sampling Procedures, dated April 1996. The low-flow purge method entails pumping a well at a flow rate approximately equal to the recharge rate of the aquifer, which may be near or slightly greater than the capacity of the well. The flow rate should not result in significant drawdown within the well. Minimal drawdown should inhibit vertical mixing within the well and result in drawing water directly from the aquifer media. The water level will be monitored regularly during the purging process to determine that the well is not being purged at a rate that induces drawdown in excess of the thresholds described in this Work Instruction. Exceptions to low-flow sampling protocols may include monitor wells sampled by bailing. These standard operating procedures may be varied or changed as required, dependent on site conditions, and equipment limitations. 2. INTERFERENCES AND POTENTIAL PROBLEMS Placing the low-flow purge pump at the vertical midpoint of the water column in a well 2.1.may be difficult for wells that experience large water level fluctuations. Drawdown may be induced in low-yield wells at even the lowest flow rates produced by 2.2.purge pumps. This may result in wells being purged to dryness. Parameters may not stabilize within a reasonable time period. Groundwater sample 2.3.collection may proceed if groundwater stabilization has not occurred after the removal of three well volumes or four hours, whichever is achieved first. 3. EQUIPMENT Prior to going to the field, instrumentation shall be assembled, calibrated in accordance with Attachment 3 and a manner consistent with manufacturers recommendations (if applicable), and tested. Additional equipment needed for manual water level measurement, sample management, and equipment decontamination is listed in Attachment 4-6 respectively. Listed below are types of equipment, instruments, and supplies necessary for well purging: Bladder pump, peristaltic pump, or small submersible centrifugal pump Pump controllers (Bladder Pump, Peristaltic Pump, and/or Variable Frequency Drive controllers) for low-flow sampling pumps Compressed gas cylinder or oil-less compressor for bladder-pump operation LC-RP-PR-057 Groundwater Sampling Revision 2 Page 18 of 48 Twin-line Teflon-lined polyethylene tubing Generator for Variable Frequency Drive style low-flow pump operation Air-hoses, couplers and adaptors, as needed Stainless steel compression fittings or dedicated grab plates Disposable polyethylene bladders Tools necessary for set-up and field maintenance of pumping equipment Fuel for generator or compressor Multi-parameter instrument Turbidity meter Flow cell for measurement of groundwater parameters Discharge tubing, hose or piping Calibrated vessel or flow meter to measure water volume purged Labeled vessels (e.g., drums or tanks) for containing purge water, if needed Water-level indicator, 0.01 feet accuracy Calculator Keys to well box locks Measuring tape Cellular phone or radio to communicate with project managers and other field staff Watch with a stopwatch function Personal Protective Equipment (PPE), including nitrile gloves and safety glasses Paper towels Garbage bags Pen or marker with indelible ink Safety Data Sheets (SDS) Decommissioning Work Plan (DWP)

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 19 of 48 Quality Assurance Project Plan (QAPP) Instrument calibration supplies and forms (see Attachment 3) Manual water-level measurement supplies (see Attachment 4) Sample collection, labeling and documentation supplies (see Attachment 5) Decontamination supplies (see Attachment 6) 4. REAGENTS No chemical reagents are used in this work instruction; however, calibration solutions and decontamination solutions may be necessary for the equipment used. 5. PROCEDURES Preparation 5.1.5.1.1 Review past purging information for equipment types, well size, purge depth, purge rates, purge volumes, pump inlet interval set point, etc. 5.1.2 Determine the low-flow purge pumps to be used, and the number and type of samples needed. 5.1.3 Obtain the equipment and supplies needed to operate the pumps, to contain and transport purge water, and to collect, handle, and transport the samples. 5.1.4 Decontaminate or pre-clean non-dedicated equipment, and ensure that it is in working order. Procedures 5.2.Procedures for low-flow purging are described below. 5.2.1 Setting Up Low-Flow Purge Equipment 1.) Clean non-dedicated sampling equipment in accordance with Equipment Decontamination Work Instruction. 2.) Unlock the well vault. If the presence of volatile organic vapors was indicated in a well during water-level monitoring activities, remove the well cap and allow the well to vent for approximately 2 minutes prior to purging and sampling. 3.) Measure the water level in accordance with Attachment 4, Manual Water-Level Measurement.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 20 of 48 4.) If the well is dry or the measured difference in depth between the depth to water and the well depth is less than three feet, the well contains insufficient water for sampling. Remove the water-level indicator and secure the well. Document the condition on the associated well log record. 5.) If using a portable pump, retrieve dedicated tubing, connect to the pump -dedicated pump intake at a depth halfway between the depth to water and the bottom of the saturated screened or open interval of the well. 6.) Install the appropriate power supply and controls for the specific type, manufacturer, size, and model of the pump. 7.) Install the in-line parameter monitoring equipment flow cell. Prior to performing purging, make sure the parameter monitoring equipment is calibrated in accordance with Attachment 3 at the beginning of each day. 8.) Set up an in-line flow meter or a calibrated container to monitor volume purged. 9.) Initiate operation of the low-flow purge pump. 5.2.2 Low-Flow Purge Set-up Using Electric Submersible Pumps Dedicated electric submersible Variable Frequency Drive (VFD) pumps are installed in some wells. Pumps are installed on steel or PVC column pipe, which conveys water from the pump to the surface. Power is supplied by a portable generator or fixed electrical source. The procedure for setting up the sampling apparatus on a well equipped with a dedicated VFD pump is the same as described above with the following additional procedures and considerations: If using a portable generator to power the well, ensure that the generator is downwind of the well. Connect discharge piping at the wellhead; usually a riser pipe that threads into the top of the column pipe with an elbow or tee above the top of the well vault. Downstream from the tee is the typical location of the flowmeter used to measure flow rate and total volume evacuated. Between the tee and the flowmeter and gate valve should be connections to divert flow through a flow cell for parameter measurements and a sample port for collection of samples. A garden hose or similar should be used to convey water from the discharge piping to the appropriate waste containment vessel. To operate the submersible pump, the electrical lead from the motor is plugged into the pump control box. The pump control box controls the flow rate at which the well will be pumping. The control box is then plugged into the generator or fixed power source. DO NOT plug in the control box until the generator has been LC-RP-PR-057 Groundwater Sampling Revision 2 Page 21 of 48 started and allowed to warm up. The control boxes are very sensitive to power fluctuations and could be damaged if the generator creates power surges or dips. When the equipment is properly connected and the generator is warmed up, the power to the control box may be switched on, starting the pump. 5.2.3 Purging The goal of low-flow purge methodology is to pump water from the well at a rate that is, to the extent practicable, equal to the rate of recharge to the well. This is accomplished by implementing the following methodology: 1.) The water level in the well is measured immediately after the pump starts to determine if drawdown is occurring in the well. 2.) If there is drawdown greater than 0.3 foot upon start-up of the well, the discharge from the pump should be decreased using the pump control box until the water level becomes stable. 3.) If no drawdown is observed, the pumping rate should be increased until drawdown is observed. The pumping rate should then be reduced to the level at which the water level is stable. The purging rate for the wells will target approximately 100 milliliters per minute (ml/min) to minimize groundwater drawdown and will not exceed 500 ml/min. 4.) If the pump cannot withdraw water at a rate that induces noticeable drawdown, the maximum pump capacity should be utilized. 5.) After a sufficient volume of water has been pumped to purge the discharge piping or tubing once, parameter measurements shall commence. Parameter measurements shall be recorded every three to five minutes, until parameter stabilization occurs, as specified below. 6.) Measure and record the depth to water at intervals not greater than five minutes. Dates should be recorded in the format MM/DD/YY. Times should be based on a 24-hour military type format for the given time zone (Central Standard Time or Central Daylight Time). For example, 8:45 a.m. should be recorded as 0845. The time 2:45 p.m. should be recorded as 1445. 7.) Adjust the pump flow rate as necessary so that excessive drawdown, greater than 0.3 feet, does not occur in the well screen or open hole interval of the well. 8.) Monitor the following groundwater parameters at intervals not exceeding five minutes: pH, specific conductance, ORP, turbidity, dissolved oxygen (DO) and temperature. Record the measurements until stabilized. Stabilization has been achieved when three successive readings are within: +/- 0.1 for pH LC-RP-PR-057 Groundwater Sampling Revision 2 Page 22 of 48 +/- 3% for conductivity +/-10 mV for ORP +/-10% for turbidity, and +/-10% for DO Temperature should be monitored even though it is not considered for stabilization. 9.) If parameters do not stabilize within three well volumes or four hours of the commencement of purging, whichever comes first, even if flow rates have been minimized, samples will be collected and a notation will be made on the sampling form. 10.) Water samples cannot pass through the in-line parameter flow cell. If there is plumbing before sampling. 11.) Collect the required groundwater samples. When sampling, make sure the sampler maintains the same flow rate sustained during the purging process. Label and store the samples on ice in an ice chest. 12.) Turn off pump and remove the non-dedicated equipment, pump power supply and controls, if necessary. 13.) Secure well cap and lock the well box. 14.) Decontaminate non-dedicated equipment in accordance with Attachment 6. 15.) Remove equipment, supplies, and wastes from the well site. At all times during purging, sampling, and clean-up, care must be taken to prevent accidental spillage of purged groundwater. 16.) Complete field record as necessary and in accordance with the requirements of this Work Instruction, the Work Plan and the QAPP. 6. HEALTH AND SAFETY Low-flow purging techniques with bladder pumps involve the use of compressed gases supplied either by a compressor or by a compressed gas cylinder. Compressed gas cylinders present special hazards due to the low temperature of the gas under high pressure and the potential for sudden uncontrolled release of the compressed gas. Care will be taken when handling and transporting compressed gases. When transporting compressed gas cylinders in a vehicle, the cylinders will be adequately secured to prevent shifting, and regulators should be removed and valve caps secured before moving.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 23 of 48 If the sampling crew is utilizing a gas-powered air-compressor, note the fire hazards associated with gas powered equipment. When operating the air compressor, make sure the compressor is placed downwind from the location where the samples will be collected and make sure the compressor is not located in close proximity to dry brush or grass. When refueling gas-powered equipment, use the proper PPE for personal protection and to eliminate the chance of cross contamination. Never refuel the compressor while it is still hot. 7. QUALITY ASSURANCE/QUALITY CONTROL The following general quality assurance/quality control (QA/QC) procedures apply: Pertinent data will be recorded. 7.1. Low-flow purge and parameter measurement equipment will be operated in accordance 7.2.with operating instructions as supplied by the manufacturer.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 24 of 48 Attachment 3 Equipment Calibration 1. PURPOSE AND SCOPE The purpose of this work instruction is for maintaining the accuracy of the instruments and measuring equipment used for conducting field tests and analyses. The instruments and equipment will be calibrated prior to each use or according to a periodic schedule. This procedure is applicable to instruments and equipment used during sampling activities at the LACBWR site. A list of field instruments (make, model, serial number) used during environmental sampling activities will be maintained. This equipment includes, but is not limited to, water-level indicators and meters to measure temperature, specific conductance, pH, dissolved oxygen, oxidation-reduction potential (ORP), and turbidity. In general, a calibration verification of field instruments will be performed daily, prior to initial use in the field. Additional calibration may be required if signs of instrument malfunction or questionable readings are observed. 2. TERMS AND DFINITIONS Buffer solution: A solution in which the pH is resistant to small additions of either a strong base or strong acid. Multi-parameter Instrument with Flow-through Cell: A multi-parameter instrument with a flow cell through which purge water passes and is monitored continuously for groundwater quality parameters such as pH, specific conductance, temperature, dissolved oxygen, ORP, and turbidity. Standard solution: A solution containing a precisely known concentration of a substance. 3. RESPONSIBILITIES Field Personnel - Performance of field activities as detailed in this procedure. Project Manager - Assure field activities comply with this procedure. Safety Manager - Assure safety at the facility through activities associated with this procedure, and review of this procedure on an ongoing basis. Coordinate use of this procedure to ensure all local, state, and federal environmental regulations are met. 4. PROCEDURE Calibration Equipment and Supplies 4.1. Manufacturer instructions and recommendations. Instruments and equipment used to gather environmental data would be calibrated LC-RP-PR-057 Groundwater Sampling Revision 2 Page 25 of 48 as specified by manufacturer instructions and recommendations. Standard solutions pH buffer solutions Squirt bottles containing deionized or distilled water 100-foot steel tape Field Log Book or Calibration Sheet Manufacturer calibration documentation, if applicable Nitrile gloves Safety glasses Turbidity Meter 4.2. If the instrument is not rented, calibrate the equipment in accordance with manufactures directions at the start of the monitoring event. Rented instruments may be pre-calibrated by the vendor and supplied with the calibration documentation. After the initial calibration, check instrument readings at the start of each day and, if needed, re-calibrate. Record expiration dates of standard solutions in Field Log Book or Calibration Sheet. Calibrate by referring to manufacturer specifications for step-by-step instructions. Do not store the instrument in areas that are below 55ºF. If the instrument is to be used in cold weather, keep it in a warm area (i.e. vehicles) when not in use. At the end of the day, check that the instrument is still providing reasonably accurate readings by measuring the concentrations of the standard solutions. Multi-parameter Instrument with Flow-through Cell 4.3. Calibrate the parameter probes at the start of each day in accordance with manufactured directions. Record expiration dates of pH buffer solutions and standard solutions in Field Log Book. Calibrate by referring to manufacturer specifications for step-by-step instructions.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 26 of 48 Do not store the probes in areas that are below 55ºF. If the probes are to be used in cold weather, keep it in a warm area (i.e., vehicles) when not in use. At the end of the day, check that the probes are still providing reasonably accurate readings by measuring the concentrations of the pH buffer solutions and standard solutions. Water-Level Indicator 4.4. Select a well that has had the historically deepest water level. Prior to each event, measure depth to water in the well using a 100-foot steel tape measure and chalk (DST). Measure depth to water in the same well using a water-level indicator with at least a 100-foot length (DWLI). Calculate the Calibration Correction Factor: C = DST - DWLI Record the Calibration Correction Factor (feet) on a Calibration Sheet or in the Field Log Book. Refer to Attachment 4, Manual Water-Level Measurement, for the formula to calculate groundwater elevation using the Calibration Correction Factor. 5. DOCUMENTATION AND RECORDS All calibration information must be documented in a Field Log Book. Information to be recorded includes: Date and time Field personnel Location Equipment make, model, and serial number Calibration solution lot and expiration date Calibration results Weather conditions Any deviations from established procedure LC-RP-PR-057 Groundwater Sampling Revision 2 Page 27 of 48 Readings of buffer and standard solutions at the end of the day If the instrument or equipment manufacturer has additional calibration documentation, it is to be included with the project files.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 28 of 48 Attachment 4 Manual Water Level Measurement 1. INTRODUCTION This work instruction describes the measurement of water levels in groundwater monitoring wells using an electric water-level indicator. This work instruction does not cover automated measurement of water levels with a transducer/datalogger. Water levels will be acquired using a methodology selected to provide accurate and precise data. This data may then be used to calculate groundwater elevations, determine hydraulic gradients and construct groundwater elevation contour maps. Accuracy and precision in obtaining the measurements are critical to the usability of the data. 2. BACKGROUND Water-level measurements should be made from a fixed reference point marked on the well. The fixed reference mark will be located on the top of the well casing or on the top of the water-level access point into the well, depending on the completion of the well at the surface. Following well installation, a survey mark is placed on the top of the well casing as a reference point for groundwater-level measurements. If a survey mark is not present, the reference point is typically established and marked on the north side of the well casing. If possible, the use of steel protective casings or flush-mounted road boxes as a measurement reference point should be avoided due to the greater potential for damage. Field personnel shall be made aware of the measurement reference point being used in order to ensure the collection of comparable data. The well reference point elevation is surveyed to the nearest 0.01 foot for later use in calculating groundwater elevation. Before measurements are made, water levels in monitor wells should be allowed to stabilize for a minimum of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after well construction and development. In low-yield situations, recovery of water levels to equilibrium may take longer. Measurements will be made to an accuracy of 0.01 foot. Water-level measuring equipment will be decontaminated prior to measurement activities at each well in accordance with Attachment 6, Equipment Decontamination. To ensure reliable data, water levels should be collected within the shortest time practical. Certain situations may produce rapidly changing groundwater levels that require taking measurements as close in time as possible. Large changes in water levels within wells may be indicative of such conditions. Rapid groundwater level changes may occur due to: Barometric pressure changes Tidal fluctuations Navigation controls on rivers LC-RP-PR-057 Groundwater Sampling Revision 2 Page 29 of 48 Rainfall events Groundwater pumping The time of data collection at each station should be accurately recorded on Attachment 1, Groundwater Monitoring Report. Personnel collecting water-level data shall record if the above conditions are known or suspected to be occurring during the groundwater-level collection period. In conjunction with groundwater-level measurements, surface water elevations (e.g., ponds, lakes, rivers, and lagoons) may be monitored as well. 3. EQUIPMENT An electric water-level indicator (i.e., sounder) consists of a battery-operated, non-stretch, electric water-level probe with permanent markings. Water level indicators will be operated and maintained pursuant to the manufactur instructions. The calibrated cable will be checked against a steel tape prior to field activities. The difference between the electric water-level indicator calibrated cable and the steel tape (the Calibration Correction Factor) will be used to calculate the water- level elevation as indicated in Section 5 of this Work Instruction. A new cable will be installed if the water-level indicator cable becomes difficult to read. Other field equipment may include: Steel survey tape for calibration Pocket tape Paper towels and trash bags Decontamination supplies, if applicable to the project Groundwater Monitoring Report Form (Form 1) 4. PREPARATION/PROCEDURE 4.1. Preparation 4.1.1 Review the Health and Safety Plan to determine project health and safety requirements. Determine and obtain the equipment and supplies needed. Obtain well depths and previous water-level monitoring data, if available. 4.1.2 Obtain site access, and necessary well keys or well wrenches. 4.1.3 Decontaminate or pre-clean equipment in accordance with Attachment 6, and ensure that it is in working order and calibrated in accordance with Attachment 3. Calibration of water sounders will be performed prior to each monitoring event. 4.1.4 Identify water-level monitoring locations on site plan prior to going into the field.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 30 of 48 4.2. Procedures Procedures for determining water levels are as follows: 4.2.1 Remove exterior lock and steel protective cover. Bail down or remove precipitation or surface water that may have accumulated in the well vault or the annulus between the steel protective cover and the casing, to prevent the water from draining into the well when opened. 4.2.2 Remove interior lock and cap or plug. Record the well ID, time of day (military format) and other pertinent information. 4.2.3 Turn on the electric water-level indicator and adjust the sensitivity, if necessary. Care should be taken to prevent contact of the water-level indicator with the ground prior to insertion in the well. Lower the water-level measuring device into the well until the audible or visual signals indicate that the probe has contacted the water surface. 4.2.4 Measure and record the depth to water from the marked reference point and also record a description of the reference point used for the measurement (e.g., top of four-inch PVC casing). Dates should be recorded in the following format MM/DD/YY. Times should be based on a 24-hour military type format for the given time zone (Central Standard Time or Central Daylight Time. For example, 8:45 a.m. should be recorded as 0845. The time 2:45 p.m. should be recorded as 1445. 4.2.5 If groundwater contact is not indicated by the audio signal, visual signal or meter, compare the total depth probed with the previously measured well depth. If the probed depth is at least equal to the well depth, the well is dry and this and the probed depth shall be recorded on the Groundwater Monitoring Report Form in the comments. If the probed depth is less than the well depth, remove the water- level indicator from the well and test it for proper operation by submersing the probe in water to confirm that it is functioning. If proper operation is determined, repeat the measurement. If the water-level measuring devise continues to indicate the well is at a probed depth less than the well total depth, the condition will be recorded and recommendations for evaluating maintenance or repair will be made. 4.2.6 Record the distance from the water surface (as determined by the audio signal, visual signal or meter) to the reference measuring point.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 31 of 48 4.2.7 Two water-level readings should be collected and the results compared. If results do not agree to within 0.01 foot, additional measurements will be taken until two readings within 0.01 foot are obtained. Consistent failure of readings to agree could suggest an anomalous condition with the well or equipment is precluding a correct measurement. Such an occurrence will be noted in the Groundwater Monitoring Report Form and the proper operation of the electric water-level indicator shall be determined prior to measuring additional water levels with that equipment. 4.2.8 Remove the down-hole measurement equipment; replace well caps, plugs, locks, and protective steel cover. 4.2.9 Record physical changes, such as evidence of tampering with the well or cover, vandalism, erosion or cracks in protective concrete pad. 5. CALCULATIONS To calculate groundwater elevation above mean sea level when using a water-level indicator, use the following equation: Where: EW = E D + C EW = Elevation of water above mean sea level (feet) or local datum E = Elevation above sea level or local datum at point of measurement (feet) D = Depth to water (feet) C = Calibration correction factor (feet) = DST - DWLI Where: DST = Depth to water measured by steel tape (feet) DWLI = Depth to water measured by water-level indicator (feet)

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 32 of 48 rface Othe Form 1 GROUNDWATER MONITORING REPORT WELL NUMBER of Date Time Depth of Water,D (ft) Previous Depth ofWater (ft) Groundwater ElevatioEw = E - D + C Remarks Well Depth(ft) FILE NO. FIELD REP. CONTRACTOR ELEVATION OF REFERENCE POINT, E (FEET) REFERENCE POINTG: round Su CALIBRATION CORRECTION FACTOR, C (FEET): r LC-RP-PR-057 Groundwater Sampling Revision 2 Page 33 of 48 Attachment 5 1. SCOPE AND APPLICATION The purpose of this work instruction is to provide guidance and direction for sample handling, shipping of samples from the field to the laboratory, and documentation of sample shipment using chain-of-custody protocols. Sample handling and shipping (also known as sample management) is the continuous care given to each sample from the point of collection to receipt at the analytical laboratory. Good sample management is intended to result in samples that are properly recorded, properly labeled, and not lost, broken, or exposed to conditions that affect the sample's integrity. The sample submissions will be accompanied with a Chain-of-Custody document to record sample collection and submission. 2. EQUIPMENT Groundwater sampling records (Form 2) Chain-of-Custody forms (example form provided in Form 3) Custody seals Water-proof re-sealable bags Indelible markers, preferably fine-point Nitrile gloves Laboratory-supplied, pre-preserved sample containers and coolers Sample labels Bubble wrap, packing material, and packing tape Shipping forms and labels Material safety data sheets (MSDS) for preservatives LC-RP-PR-057 Groundwater Sampling Revision 2 Page 34 of 48 3. PROCEDURES 3.1. Preparation Prior to entering the field area where sampling is to be conducted the sampler should ensure that materials necessary to complete the sampling are available. When sampling in extremely cold weather, proper protection of water samples, equipment rinse blanks, and field blanks from freezing will be considered. Personnel performing groundwater-sampling tasks will check the sample preparation and preservation requirements presented in the Quality Assurance Project Plan. The sampling personnel will also confirm before the sample event the amount of bottle filling required for the respective sample containers. 3.2. Procedures Samples will be properly labeled as soon as practical after collection. 3.2.1 Field Custody Procedures Field personnel will be required to keep written records of field activities on applicable preprinted field forms or in a bound field notebook. These records will be written legibly in ink and will contain pertinent field data and observations. Entry errors or changes will be crossed out with a single line, dated and initialed by the person making the correction. The Project Manager will periodically review field forms and notebooks. Each logbook will include the field team name, project name, project start date, project end date, and unique logbook number. 3.2.2 Field Procedures The following field procedures will be followed for sample collection: 1.) Upon collection, samples are placed in the proper containers. The sample container, preservation methods, shipping, and packaging requirements are presented in Table 1-1 of LC-RP-PR-057 S 2.) Samples will be assigned a unique sample number as described in Section 3.2.4 below and will be affixed to a sample label. Information on the labels will be completed with a ballpoint pen or indelible marker. 3.) Samples will be preserved by field personnel in order to minimize loss of the constituent(s) of interest due to physical, chemical or biological mechanisms.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 35 of 48 4.) Appropriate volumes will be collected to ensure that the requested detection limits can be successfully achieved and that the required Quality Control (QC) Sample Analyses can be completed. 3.2.3 Quality Control Samples The following QC samples should be collected: 1.) One field duplicate per 20 samples will be collected and analyzed for each target analyte. 2.) One field equipment rinse blank will be collected for each type of field equipment used for the sampling effort. If disposable sampling equipment is used, equipment rinse samples may not be collected. Equipment rinse blanks consist of deionized or distilled water that has been routed through decontaminated sampling equipment and collected into the appropriate containers. Field equipment rinse blanks will be analyzed for each target analyte. 3.2.4 Sample Labels/Sample Identification The samples will be labeled with: 1.) A unique sample name 2.) Grab or composite sample 3.) Date and time 4.) Analyses to be performed 5.) Preservative (no preservative indicated as 6.) Analytical laboratory 7.) File number and project 8.) Comments, if any 9.) Company name 10.) Sampler's initials Labels should be secured to the bottle and should be written in indelible ink. Note that the data identified for the sample label are the minimum required. The unique sample identification number may follow the format recommended below, or a specific sample protocol for labeling may be determined prior to sampling. Recommended sample names will include the following:

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 36 of 48 Groundwater samples: Well identifier Dash If applicable, samples Dash Date, Equipment rinse blank samples: - Dash Date, The following table provides sample name examples. Type of Sample Well ID Duplicate Sample Sample Date Sample Name Primary sample MW-201A- 042313 MW-201A-042313 Duplicate sample MW-201A- D- 042313 MW-201A-D-042313 Equipment rinse blank Equipment-rinse- 042313 Equipment-rinse-042313 Duplicate samples will follow the same naming convention with a unique sample number (i.e., MW-201A-D-mmddyy) but blind duplicates are not needed. Notes will also be kept in the field logbook and/or sampling record to identify which samples are primary and field duplicate pairs.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 37 of 48 3.2.5 Packaging Whenever possible, sample container preparation and packing for shipment should be completed in a well-organized and clean area, free of potential cross- contaminants. Sample containers should be prepared for shipment as follows: 1.) Don nitrile gloves. 2.) Containers should be wiped clean of debris and water using paper towels. 3.) If the container size and number of containers allow, the sample containers collected from an individual well for an individual laboratory will be placed into one cooler. 4.) Tighten the bottle caps to prevent leakage. The following packing guidelines should be followed: 1.) Line the bottom of the cooler with packing material. Line the cooler with a plastic bag to prevent leakage and tie shut around samples. 2.) Do not bulk pack. Each container will be individually padded and will stand upright in the cooler. 3.) One-liter or larger glass containers require much more space between containers. 4.) Glass containers will be individually wrapped in bubble wrap and sealed. 5.) Enclose the Chain-of-Custody form in a plastic re-sealable bag and attach to the inside top of the cooler. 6.) Place custody seals (two, minimum) on each cooler if the cooler is shipped by means other than laboratory supplied courier. Coolers with hinged lids should have both seals placed on the opening edge of the lid. Coolers with "free" lids should have seals placed on opposite diagonal corners of the lid. Place clear tape over custody seals. 7.) Ensure that the stickers, markings and prior address labels have been removed from coolers being used that previously contained such materials. 3.2.6 Chain-of-Custody Records LC-RP-PR-057 Groundwater Sampling Revision 2 Page 38 of 48 Chain-of-Custody forms will be completed for the samples collected. The form documents the transfer of sample containers. An example Chain-of-Custody is attached as Form 3. The Chain-of-Custody record, completed at the time of sampling, will contain, but not be limited to: Sample name (corresponding to the sample ID on the sample labels) Project or file number Project/client name and location Sampler signature(s) Date/time of sample collection Type of samples (composite or grab; soil or water matrix) Analytical requirements Number and type of containers Remarks (e.g., HTDs only if tritium etc.) Date and time samples were relinquished Date and time samples were received Each sample cooler being shipped to the laboratory will contain an original Chain-of-Custody form. The sampler will make and retain a copy. The original Chain-of-Custody form will be enclosed in a waterproof envelope taped inside to the inside of the lid of the cooler containing the samples. The cooler will then be sealed for shipment. The laboratory, upon receiving the samples, will complete the original Chain-of-Custody form and prepare a copy. The laboratory will retain the copy for their records. The original Chain-of-Custody form will be returned with the data deliverables package. The following list provides guidance for the completion and handling of Chain- of-Custody forms. 1.) Custody forms used should be standard forms or those supplied by the analytical laboratory. Do not use custody forms from other labs, even if the heading is blocked out. 2.) Custody forms will be completed in indelible ink only. 3.) Custody forms will be completed neatly using printed text.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 39 of 48 4.) Do not use "Ditto" or quotation marks to indicate repetitive information in columnar entries. If repetitive entries will be made in the same column, place a continuous vertical arrow between the first entry and the next different entry. 5.) If necessary, place additional instructions directly onto the custody form. Do not enclose separate loose instructions. 6.) When shipping samples via an overnight express service (i.e., Federal Express), the air-bill number for the shipment should be noted on the custody form. 7.) Include a contact name and phone number on the custody form in case there is a problem with the shipment. 8.) Before using an acronym on a custody form, define clearly the full interpretation of your designation [i.e., tritium (H-3)]. 3.2.7 Shipment The samples will be delivered to the laboratory by the samplers, transported by a laboratory-supplied courier or shipped to the laboratory using an overnight carrier. Prior to the start of the field sampling, the laboratory or shipper should be contacted to determine if pickup can be made at the field site location. If pickup at the field site can be made, the "no-later-than" time for having the shipment ready will be determined. If pickup is unavailable at the site, the nearest pickup or drop-off location should be determined. Again, the "no-later-than" time for each location should be determined. Sufficient time will be allowed not only for packaging but also for delivery of samples. Sample shipments will not be left at unsecured drop locations (i.e., if the cooler will not fit in a remote drop box, do not leave the cooler unattended next to the drop box). Some overnight carriers do not provide "overnight" shipment to/from some locations. Do not assume. Call the carrier in advance before the start of the fieldwork. 4. HEALTH AND SAFETY In some instances, sample containers may contain preservatives that can cause bodily injury if they come in contact with eyes or skin, or are ingested. Care should be taken to wear the appropriate personal protective equipment (PPE) during sample handling, in conformance with the Health and Safety Plan and Safety Data Sheets (SDS). 5. QUALITY ASSURANCE/QUALITY CONTROL LC-RP-PR-057 Groundwater Sampling Revision 2 Page 40 of 48 The following general quality assurance/quality control (QA/QC) procedures apply: The data will be documented in the record on Form 2, Low-Flow Groundwater Sampling Record. Any corrections to entries on the chain of custody will have a single line through the information being corrected along with the correct information and the initials and date. Dates should be recorded in the format MM/DD/YY. Times should be based on a 24- hour military type format for the given time zone (Central Standard Time or Central Daylight Time). For example, 8:45 a.m. should be recorded as 0845. The time 2:45 p.m. should be recorded as 1445. 6. ATTACHMENTS 6.1 Form 2, Low-Flow Groundwater Sampling Record 6.2. Form 3, Chain of Custody and Analytical Request LC-RP-PR-057 Groundwater Sampling Revision 2 Page 41 of 48 Form 2 LOW-FLOW GROUNDWATER SAMPLING RECORD Page of PROJECT LOCATION SAMPLER FILE NO. FIELD REP DATE GROUNDWATER SAMPLING INFORMATION Well ID Depth Of Well (ft.) per Log Reference Mark Depth to Water from Reference Mark (ft.) Time Depth to Product (ft.) Field Measured Depth Of Well (ft.) Inside Diameter (in.) Standing Water Depth (ft.) Volume Of Water In Well (gallons/liters) Purging Device Volume of Bailer/Pump Capacity Cleaning Procedure Bails Removed/ Volume Removed Time Purging Started Time Purging Stopped Instrument Used to Monitor Field Parameters Sampling Device Cleaning Procedure Color Odor LC-RP-PR-057 Groundwater Sampling Revision 2 Page 42 of 48 Form 2 LOW-FLOW GROUNDWATER SAMPLING RECORD Page of PROJECT FILE NO. LOCATION FIELD REP SAMPLER DATE GROUNDWATER SAMPLING INFORMATION TIME SAMPLES TAKEN Tritium Gamma Cobalt-60 Strontium-90 Cesium-137 HTDs PARAMETERS Time Temp. C Conductivity (umhos/cm) Dissolved Oxygen (mg/L) pH ORP (mV) Drawdown Ft Volume purged/Gals Turbidity (NTU) Remarks: (ie: field filtrations, persons communicated with at site, etc.)

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 42 of 47 Form 3 - Chain of Custody and Analytical Request EXAMPLE Page: of Project #: Quote #: COC Number: PO Number: Work Order Number: Laboratory Address: Phone: Fax: Client Name: Phone #: Sample Analysis Requested (5) (Fill in the number of containers for each test) Project/Site Name: Fax #: Should this sample be considered: Total number of containers <-- Preserva tive Type (6) Address: Comme nts Note: extra sample is required for sample specific QC Collected by: Send Results To: Radioactive TSCA Regulated Sample ID

• For composites - indicate start and stop date/time *Date Collecte d (mm- dd-yy) *Time Collected (Military) (hhmm) QC Co de (2) Fiel d Filte red (3) Sam ple Mat rix (4)

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 43 of 48 Form 3 - Chain of Custody and Analytical Request EXAMPLE 1 L pol y 1 L pol y TAT Requested: Normal: 10 Rush: Specify: (Subject to Surcharge) Fax Results: Yes/ No (see project setup) Circle Deliverable: C of A / QC Summary / Level 1 / Level 2 / Level 3 / Level 5 Remarks: Are there any known hazards applicable to these samples? If so, please list the hazards Sample Collection Time Zone Eastern Pacific Central Other Mountain X Chain of Custody Signatures Sample Shipping and Delivery Details Relinquished By (Signed) Date Time 1 Received by (signed) Date Time 1 Method of Shipment: FedEx Date Shipped: 2 2 Airbill #: 3 3 Airbill #: 1.) Chain of Custody Number=Client Determined 2.) QC Codes: N=Normal Sample, TB=Trip Blank, FD=Field Duplicate, EB: Equipment Blank, MS=Matrix Spike Sample, MSD: Matrix Spike Duplicate Sample, G=Grab, C=Composite 3.) Field Filtered: For liquid matrices, indicate with a Y for yes the sample was field filtered or N for sample was not field filtered. 4.) Matrix Codes: DW=Drinking Water, GW=Groundwater, SW=Surface Water, WW=Waste Water, W=Water, ML=Misc Liquid, SO=Soil, SD=Sediment, SL=Sludge, SS=Solid Waste, O=Oil, F= Filter, P=Wipe, U= Urine, F= Fecal, N=Nasal 5.) Sample Analysis Requested Analytical method requested (i.e. 8260B,6010B/7470A) and number of containers provided for each (i.e.8260B-3, 6010B/7470A-1). 6.) Preservative Type: HA= Hydrochloric Acid, NI= Nitric Acid, SH= Sodium Hydroxide, SA= Sulferic Acid, HX=Hexane, ST= Sodium Thiosulfate, If no preservatives added= leave field blank. For Lab Receiving Use Only Custody Seal Intact? YES NO Cooler Temp: C LC-RP-PR-057 Groundwater Sampling Revision 2 Page 44 of 48 Attachment 6 Equipment Decontamination 1. SCOPE AND APPLICATION The purpose of this Work Instruction is to provide a description of the methods used for preventing, minimizing, or limiting cross-contamination of samples due to inappropriate or inadequate equipment decontamination. This Work Instruction also provides general guidelines for developing decontamination procedures for sampling equipment to be used during hydrogeologic investigations. This Work Instruction does not address personnel decontamination. 2. METHOD SUMMARY Equipment utilized for groundwater sampling at multiple locations requires decontamination prior to reuse. The decontamination procedure may be summarized as follows: 1. Physical removal 2. Non-phosphate detergent wash 3. Tap water rinse 4. Distilled/deionized water rinse 5. Air dry 3. EQUIPMENT The following standard materials and equipment are recommended for decontamination activities: Decontamination Solutions 3.1. Non-phosphate detergent Potable or tap water Distilled or deionized water Decontamination Tools/Supplies 3.2. Brushes Drop cloth/plastic sheeting LC-RP-PR-057 Groundwater Sampling Revision 2 Page 45 of 47 Paper towels Plastic or galvanized tubs or buckets or other suitable containers Sprayers, squirt bottles, or pressurized sprayers (H2O) Aluminum foil Tables, plastic sheeting, or other devices to keep equipment off of the ground Health and Safety Equipment 3.3. Personal protective equipment shall include safety glasses or splash shield, and appropriate gloves (as per the Health and Safety Plan). SDS for non-phosphate detergent Waste Disposal 3.4. Trash bags or containers Labeled drums provided by the facility-contracted waste-handler Containers for storage of decontamination solutions Container labels and permanent markers 4. REAGENTS Water and non-phosphate detergent are utilized for decontamination purposes. 5. PROCEDURES This Work Instruction was established to minimize the potential for contamination. The following actions may be taken to minimize contamination potential: 1. Work practices that minimize contact with potential contaminants 2. Using remote sampling techniques 3. Covering monitoring and sampling equipment with plastic, aluminum foil, or other protective material 4. Watering down dusty areas 5. Avoid laying down equipment in areas of obvious contamination 6. Use of disposable sampling equipment LC-RP-PR-057 Groundwater Sampling Revision 2 Page 46 of 47 Field Sampling Equipment Decontamination Procedures 5.1.Steps 1 and 2: Physical Removal and Detergent Wash Place plastic sheeting on the ground to minimize impacts from spillage of decontamination fluids. Fill a wash basin, a large bucket, or other suitable container with non-phosphate detergent and tap water. A brush or brushes to physically remove contamination should be dedicated to this station. The volume of water required will depend upon the amount of equipment to decontaminate and the amount of contamination. If necessary, use a brush to physically remove foreign materials from the surface of the equipment. Scrub equipment with a mild solution of non-phosphate detergent and potable or tap water using brushes. Step 3: Potable or Tap Water Rinse Fill a washbasin, a large bucket, or other suitable container with potable or tap water. A brush or brushes should be dedicated to this station. Use a volume of water similar to that used for Step 1. Wash soap off equipment with water by immersing the equipment in the water while brushing. Step 4: Distilled/Deionized Water Rinse Fill a low-pressure sprayer with distilled/deionized water. Provide a 5-gallon bucket or basin to contain the water during the rinsing process. Rinse sampling equipment with distilled/deionized water with squirt bottles, sprayers, or a low-pressure sprayer. Step 5: Air Dry Lay clean equipment on a clean surface to dry. Once dry, the sampling equipment may be wrapped with aluminum foil, plastic, or other protective material. Follow these steps at the completion of decontamination: 1.) Empty non-phosphate detergent and water liquid wastes from basins and buckets to the ground, or into an appropriate waste container if directed by LaCrosseSolutions personnel. 2.) Use low-pressure sprayers to rinse basins and brushes. 3.) Empty low-pressure sprayer water to the ground or into an appropriate waste container if directed by LaCrosseSolutions (LS) personnel. 4.) Place solid waste materials generated from the decontamination area (i.e., gloves and plastic sheeting, etc.) in a labeled drum provided by the LaCrosseSolutions personnel.

LC-RP-PR-057 Groundwater Sampling Revision 2 Page 47 of 47 5.) Complete labels for waste containers and make arrangements for disposal by appropriate label for each drum generated from the decontamination process. 6. HEALTH AND SAFETY When working with potentially hazardous materials, follow OSHA, U.S. EPA, and LaCrosseSolutions regulations and guidelines, and the Health and Safety Plan. Decontamination can pose hazards under certain circumstances. Hazardous substances may be incompatible with decontamination materials. For example, the decontamination solution may react with contaminants to produce heat, explosion, or toxic products. In addition, vapors from decontamination solutions may pose a direct health hazard to workers by inhalation, contact, fire, or explosion. The decontamination solutions will be determined to be acceptable before use. Decontamination materials may degrade protective clothing or equipment. If decontamination materials do pose a health hazard, measures should be taken to protect personnel or substitutions should be made to eliminate the hazard. Material generated from decontamination activities requires proper handling, storage, and disposal. Personal Protective Equipment may be required for these activities. Safety Data Sheets (SDS) are required for the decontamination solutions.