TheStage1Disinfectants/DisinfectionByproductRule郑州微信营销•PublicHealthProtectionFor:–AcuteMicrobialRisks–ChronicDBPRisks•Cross-OverImpactsBackground(cont.)•PublicHealthProtectionforDBPsandDisinfectants–BalanceRisks–OptimizationofProtection•AProductof6YearsofCollaboration–RegNegin1992–FACAin1997•Participants–WaterSupplyIndustry–EnvironmentalandPublicHealthGroups–Local,State,andFederalGovernmentsBackground(cont.)•StagedProcess–1996InformationCollectionRule–On-GoingResearch•FirstSet:ModerateActiontoBalanceRisks–Stage1DBPR–IESWTRSpring/Summer2001Spring/Summer2001Spring/Summer2001May2002May2002Background(cont.)•PlannedRules–FilterBackwashRecyclingRule–LongTerm1ESWTR–GroundWaterRule–Stage2DBPR–LongTermESWTRBackground(cont.)•LargePopulationPotentiallyExposedtoDBPs•HealthHazardsofDBPs:–ToxicologyEvidence–EpidemiologicalEvidenceBackground(cont.)•ImproveProtectionAgainstRisksFrom:–KnownDBPs–UnknownDBPs•BalanceRisksandBenefitsOf:–SWTR–IESTWR–LeadandCopperRule–TotalColiformRuleBackground(cont.)•140MillionPeopleWillHaveIncreasedProtectionFromDBPs•24PercentReductioninDBPLevels(NationalAverage)•ReductioninExposureto:–HaloaceticAcids–Bromate–Chlorite•ReducedRisksFrom:–Cancer–ReproductiveEffects–DevelopmentalEffectsRuleStructureRuleStructure•Part141–NationalPrimaryDrinkingWaterRegulations–SubpartA:§141.2Definitions–SubpartB:§141.12MCLsforOrganicChemicals–SubpartC:§141.30TTHMSampling,AnalyticalandOtherRequirements–SubpartD:§141.32PublicNotification–SubpartF:§141.53MCLGsand§141.54MRDLGs–SubpartG:§141.64MCLsandMRDLs–SubpartI:§141.89AnalyticalRequirements–SubpartL:DisinfectionResiduals,DBPsandDBPPs–SubpartO:§141.154RequiredHealthInformation–SubpartP:EnhancedFiltrationandDisinfectionRuleStructure•Part142–NationalPrimaryDrinkingWaterRegulationsImplementation–§142.14RecordsKeptbyStates–§142.16SpecialPrimacyRequirementsProvisionsofTheStage1DisinfectantsandDisinfectionByproductsRuleSubpartA–General•§141.2Definitions–EnhancedCoagulation–EnhancedSoftening–GAC10–HaloaceticAcids(five)(HAA5)–MaximumResidualDisinfectantLevel(MRDL)–MaximumResidualDisinfectantLevelGoal(MRDLG)–SubpartHSystems–SUVA–TotalOrganicCarbon(TOC)SubpartB•SubpartB–MaximumContaminantLevels–§141.12MCLsforTTHMsPhasesOuttheCurrentMCLSubpartC•SubpartC–MonitoringandAnalyticalRequirements–§141.30TTHMsSampling,Analytical,andOtherRequirementsChangestoCitationsDesignatesEffectiveDatesSubpartD•SubpartD–Reporting,PublicNotification,andRecordkeeping–§141.32PublicNotificationSubpartsFandGMCLGs&MCLsforDisinfectionByproductsDBPMCLG(mg/L)MCL(mg/L)TotalTrihalomethanes-0.080Chloroform--Bromodichlorolmethane0-Bromoform0-Dibromochloromethane0.06-SubpartsFandG(cont.)MCLGs&MCLsforDisinfectionByproductsDBPMCLG(mg/L)MCL(mg/L)FiveHaloaceticAcids(HAA5)-0.060MonochloraceticAcid--DichloroaceticAcid0-TrichloraceticAcid0.30-MonobromoaceticAcid--DibromoaceticAcid--SubpartsFandG(cont.)MCLGs&MCLsforDisinfectionByproductsMCLG(mg/L)MCL(mg/L)Chlorite0.801.0Bromate00.010SubpartsFandG(cont.)MRDLGs&MRDLsforDisinfectantsDisinfectantMRDLG(mg/L)MRDL(mg/L)Chlorine44.0Chloramines44.0ChlorineDioxide0.80.8SubpartsFandG(cont.)BATForDisinfectionByproductsDBPBATTTHMsandHAA5EnhancedCoagulationorGAC10,WithCl2AsDisinfectantChloriteControlofTreatmentToReduceDisinfectantDemandAndToReduceDisinfectantLevelsBromateControlofOzoneTreatmentToReduceProductionofBromateSubpartLStructure•SubpartL–DisinfectantResiduals,DisinfectionByproducts,andDisinfectionByproductPrecursors–§141.130:GeneralRequirements–§141.131:AnalyticalRequirements–§141.132:MonitoringRequirements–§141.133:Compliance–§141.134:ReportingandRecordkeeping–§141.135:TreatmentTechniquesforControlofDBPPrecursors§141.130GeneralRequirements§141.130GeneralRequirements•Applicability–CWSsandNTNCWSsThatAddChemicalDisinfectants–TNCWSsThatAddChlorineDioxide•ComplianceDates–SubpartHServing10,000orMorePeople3YearsJanuary1,2002PossibleExtensions–AllOtherSystems5YearsJanuary1,2004•QualifiedPersonnel§141.131AnalyticalRequirements§141.131AnalyticalRequirements•SpecifiesAnalyticalMethods•CertifiedLabsfor:–DBPs(chloriteexception)•PartiesApprovedbytheStatefor:–Disinfectants–Alkalinity–Bromide–TOC—chlorite–SUVADOCUV254–pH§141.132Monitoring§141.132Monitoring–General•NormalOperatingConditions•MultipleWellsinSameAquifer–TTHMandHAA5•SystemsMustMonitorAccordingtoPlan§141.132Monitoring—DBPsRoutine—TTHMsandHAA5ReducedSystemTypeFrequencyLocationConditionsFrequencySubpartH10,0004/plant/qtr25%Max.ResidenceTime(RT)75%Rep.50%ofMCLsTOC4.0mg/L1/plant/qtratMaxRTSubpartH500–9,9991/plant/qtrMax.RT50%ofMCLsTOC4.0mg/L1/plant/yearinmonthofwarmestwatertemp.MaxRTGroundWater10,0001/plant/qtrMax.RT50%ofMCLs1/plant/yearinmonthofwarmestwatertemp.MaxRTSubpartH5001/plant/yearinmonthofwarmestwatertemp.Max.RTNoReducedMonitoringGroundWater10,0001/plant/yearinmonthofwarmestwatertemp.Max.RT50%ofMCLs(2years)or25%ofMCLs(1year)1/plant/3yearsinmonthofwarmestwatertemp.MaxRT§141.132Monitoring–DBP•ReducedMonitoringforTTHMandHAA5AsLongAs:–QuarterlyMonitoringAnnualAverageofSampl