ConsiderationsforNPDESGeneralfPermitorAquaticPesticides•Focus:AquaticWeedandAlgaeControl•NOI–Whoneedstofile?–TreatedAcreageThreshold?•CaseStudies–NOIsinpractice–TreatmentScaleandProductChoicev.GoalofEliminatingDischargeEffl tit•uenLims–Quantitative?•MonitoringCh llffi idi h/lblliith t–aengesoconrmngproperscargeaecompancewouanalyticalsamplingNOIConsiderations•EPAApproach?–160wateracresincalendaryearQuestions:–•Treatedacresorwaterbody?•Multipletreatmentssameacreage?treatmentsofacreage?–NOI‘Operator’•decisiontotreatand/orcontrolofcomplianceactivitiesdecisioncontrolcomplianceactivitiesNOIConsiderations•Challenges–PermiteeswillworktostayunderNOIthresholdandsignificantdischargeactivitymightnotbecapturedviaNOIsystem–Examples:ldii•Keeptreatmentsessuner160acresnagvenwaterbody–LakeAssociationisthe‘operator’...subcontractsapplicator–Canapplicatoravoidadding160acrestoaggregatecount?–Encourageslessrelianceoncertifiedapplicatorswhowillexceedthresholds(lessqualifiedapplicatorsordo‐it‐yourself)NOIConsiderations•Challenges–Permiteeswillseektousespottreatmentsolutionsthatencourageuseofolderchemistrywithhigheruseratesandlessfavorabletoxicology–MaximumUseRatesv.MCL•New(since1986)(in‐water)–Imazamox0.500ppm MCL=NotEstab...ToleranceExempt–Penoxsulam0.150ppm MCL=NotEstab...DWLOC1.500ppm–Fluridone0.150ppm MCL=NotEstab...HAL0.560ppm(CA)–Triclopyr 2.500ppm MCL=NotEstab...0.4ppmlabelDWlimit•Old–Diquat 0.370ppm MCL=0.020ppm–Endothall 5.000ppm MCL=0.100ppm–2,4‐D 4.000ppm MCL=0.070ppm–Copper 1.000ppm MCL=1.300ppmNOI– CaseStudy1(LAKES)5lakes–avg100surfaceacreseach(10ftmeandepth)25%avgcoverofinvasivesubmersedweeds(5ftmeandepth)PERMITEEGOAL:AvoidNPDESNOISubmission25•ACTION:25acresofsmall‐scaletreatmentperlakewith2,4‐D@100lbs/Aof19%2,4‐Destergranule(1.4ppmin5ft)=2,500lbsofformulatedherbicideor475lbsaiperlake25acres2,375lbsofherbicidedischargedfor5lakesNONOINEEDED(only125totalacrestreated)PERMITEEGOAL:UseBATandReduceEnvironmentalLoading100totalacres•ACTION:100acresofwhole‐laketreatmentwithfluridone@10ppbtotal4lbai/galliquid=6.8gallonsperlake=27.2lbsaiper100acrelake136lbsofherbicidedischargedfor5lakesNOINEEDED(all500totalacrestreated)THRESHOLDDISCOURAGENOITHRESHOLDWOULDDISCOURAGE17‐foldREDUCTIONINDISCHARGE

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docket-customerservice@epa.govNOI– CaseStudy2(PONDS)405‐APonds–5ftmeandepth20%avgcoverofinvasivesubmersedweedsPERMITEEGOAL:AvoidNPDESNOISubmission•ACTION:Treat1acreperpondwithcontactherbicide@2gal/Aof2lbai/galdiquat=4lbsai/pond/trmt160lbsofherbicidedischargedfor40pondspercycleThreeRepeatApplications=480totallbsactiveNONOINEEDED(only120totalacrestreated)PERMITEEGOAL:UseBATandReduceEnvLoading5acres•ACTION:5acresofwhole‐pondtreatmentwithfluridone@45ppbtotal5%pellet=60lbspelletsperpond=3lbsaiperpondforseason120lbsofherbicidedischargedfor40pondsNOINEEDED(all200totalacrestreated)NOITHRESHOLDWOULDDISCOURAGEDISCOURAGETHRESHOLDDISCOURAGE4‐foldREDUCTIONINDISCHARGEPotentialPermitModelPotentialThreshold‐BasedComplianceB)Allwaterbodies10to100acresfileNOIshortformandcomplywiththefollowingpermitprovisionsA)Allwaterbodies<10acres,automaticallycoveredbyGeneralNPDESpermit.Retainsprayrecords,mapandwatersampleanalysisdata(a.i.)for3yrs.PotentialThreshold‐BasedComplianceB)Allwaterbodies10to100acresfileNOIshortformandcomplywiththefollowingpermitprovisionsA)Allwaterbodies<10acres,automaticallycoveredbyGeneralNPDESpermit.Retainsprayrecords,mapandwatersampleanalysisdata(a.i.)for3yrs.B)Allwaterbodies10to100acres,fileNOIshortformandcomplywiththefollowingpermitprovisions.C)Allwaterbodies>100acressubmitNOIlongformandthencomplywithfollowingpermitprovisions.WaterbodySize(acres)PermitProvision<1010to100>100B)Allwaterbodies10to100acres,fileNOIshortformandcomplywiththefollowingpermitprovisions.C)Allwaterbodies>100acressubmitNOIlongformandthencomplywithfollowingpermitprovisions.WaterbodySize(acres)PermitProvision<1010to100>Provision100NoticeofIntent‐Short xNoticeofIntent‐Long xActiveIngredientMonitoring x x xBMP x xPermitProvision<1010to100>100NoticeofIntent‐Short xNoticeofIntent‐Long xActiveIngredientMonitoring x x xBMP x xBATx xPDMP(PesticideDischargeManagementPlan)xMonitoringandSurveillance(quantitative) xRecordKeeping(ataminimumsprayreport,BATx xPDMP(PesticideDischargeManagementPlan)xMonitoringandSurveillance(quantitative) xRecordKeeping(ataminimumsprayreport,map,a.i.pre/postdata)xxxAnnualReporttoEPAorState xmap,a.i.pre/postdata)xxxAnnualReporttoEPAorState xMonitoring•Analyticalconfirmationofdischargeseemsconfirmationdischargeessentialto:–Classifydischargeasexcesswasteercourt/planguage–Attributeanadverseincidenttopesticidedi hhlscargeversussomeoterenvironmentalfactor•Adverseincident– meansanincidentwhichyouhaveobserveduponinspectionorofwhichyouotherwisebecomeaware,inwhich:•(1)Apersonornon‐targetorganismmayhavebeenexposedtoapesticideresidue,and•(2)Thepersonornon‐targetorganismsufferedatoxicoradverseeffect....Monitoring•ChallengesofRequiringAnalyticalMonitoringRequiringAnalyticalMonitoring–Impractical/Impossibletoimplementanalyticalmonitoringforeveryaspectofaquatictreatmentmonitoringaquatictreatment•Expense,lackofresources,complexitiesofusevs.samplingdesign–Lackofmonitoringgreatlyincreasespotentialforlegalaction•Adverseincident...musthavebeentreatmentandregulatorygroupsshouldhaveprovidedbetteroversightMonitoring•CAStateNPDESPermit(precedent)–10%ofallsites–Background,Event,Post‐EventMonitoring–ProvidessomedefensethatlabelwasfollowedProvidesdefensefollowed•WhywillEPAnotimplementrequirementssimilartoCA?hhk ?•Watapproaceswillstatestae–CAormore‐‐‐‐‐‐‐‐Nothing•Legalchallengeswithhavingdifferentsystems?challengesdifferentsystems?–Mostwaterisinterstateinnature...differentinterpretationsMonitoring•PossibleApproach?–Requirerepresentativeanalyticalmonitoringforallactivestoconfirmlabelcompliance•MultipleusesforCWAandFIFRAregulationDidhib ttdt t•youaceveunoexceeargedose–UnderTarget:potentialwastebecausedidn’tmaximizedoseandlikelycontrol–OverTarget:excessorpotentialFIFRAviolationR t ti 10% i iltCAd l•Representative...10%...similaromoe•Pre‐Treatment–Confirmnobackgroundsignal•Post‐Treatment–Immediatelyposttreatment(liquid)–Peakofreleasefordryformulations»24hoursaftertreatment– 3weeksaftertreatment•RequireforotherFIFRA‐regulatedwaterusesRequireregulatedMiscTopics•GeneralBMP–CitationsofbathymetrysourceshouldberequiredforallNOItreatments.Updatedbathymetry10shouldbe–Updatedbathymetry(lastyears)requiredforalltreatmentsover100acresandrecommendedforall.Floreadingsalle ances–wreadingsannuyforconveyances•E.g.,WAirrigationsystempermit•Biologicals–Howmighttheybeapproacheddifferentlyvs.chemicalproductsinpermit?