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MetropolitanWastewaterManagementCommissionMetropolitanWastewaterManagementCommissionCapitalImprovementProgramCapitalImprovementProgram <br />AERATIONBASINIMPROVEMENTSAERATIONBASINIMPROVEMENTS–PHASE2 <br />Description: <br />AerationBasin(Phase2):Addstepfeed,anoxicselectors,andfinebubblediffusersto4Basin(Phase2):Addstepfeed,anoxicselectors,andfinebubblediffusersto4Basin(Phase2):Addstepfeed,anoxicselectors,andfinebubbledi <br />ffusersto4 <br />ofthe8cellsoftheaerationbasinsandmakehydraulicimprovements.Thisprojectwasofthe8cellsoftheaerationbasinsandmakehydraulicimprovements.Thisprojectwasofthe8cellsoftheaerationbasinsandmakehydraulicimprove <br />ments.Thisprojectwas <br />originallytheNorthAerationBasinImprovementsproject;howeverthePhaseoriginallytheNorthAerationBasinImprovementsproject;howeverthePhaseoriginallytheNorthAerationBasinImprovementsproject;howeverthePhase1 <br /> <br />study/designphaseshowedthatimprovementstothefoureasternmostbasinsasafirststudy/designphaseshowedthatimprovementstothefoureasternmostbasinsasafirststudy/designphaseshowedthatimprovementstothefoureaste <br />rnmostbasinsasafirst <br />phasewouldallowforbetterhydraulicsandmoreoperationalflexibility.phasewouldallowforbetterhydraulicsandmoreoperationalflexibility.phasewouldallowforbetterhydraulicsandmoreoperationalflexibility. <br /> <br />Status: <br />TheAerationBasin(Phase2)projectisanticipatedtostartdesigndevelopmenTheAerationBasin(Phase2)projectisanticipatedtostartdesigndevelopmenTheAerationBasin(Phase2)projectisanticipatedtostartdesigndevelopm <br />entin2016. <br />Justification: <br />Increasethedryweatheraerationbasintreatmentcapacitywithrespecttoammonia(withIncreasethedryweatheraerationbasintreatmentcapacitywithrespecttoammonia(withIncreasethedryweatheraerationbasintreatmentcapa <br />citywithrespecttoammonia(with <br />nitrification)andincreasethewetweathertreatmentcapacity.nitrification)andincreasethewetweathertreatmentcapacity. <br />ProjectDriver: <br />NPDES(NationalPollutionDischargeEliminationNPDES(NationalPollutionDischargeEliminationSystem)permitincludesammonialimitSystem)permitincludesammonialimit <br />requiringnitrificationindryweatherandexpansionofwetweathercapacitytotreatwetrequiringnitrificationindryweatherandexpansionofwetweathercapacitytotreatwetrequiringnitrificationindryweatherandexpansiono <br />fwetweathercapacitytotreatwet <br />weatherflowstomeetNPDESpermitmonthlyandweeklysuspendedsolidslimits.weatherflowstomeetNPDESpermitmonthlyandweeklysuspendedsolidslimits.weatherflowstomeetNPDESpermitmonthlyandweeklysuspendedsolidslimit <br />s. <br />ProjectTrigger: <br />AddresswaterqualityrequireAddresswaterqualityrequirements(needtoevaluatetheupcomingMWMCNPDESments(needtoevaluatetheupcomingMWMCNPDES <br />permitrenewalrequirements).permitrenewalrequirements). <br />ProjectType: <br />50%Capacity;50%Performance50%Capacity;50%Performance <br />Improvement <br />SDCEligibility: <br />59% <br />EstimatedProjectCost: <br />$12,461,000$12,461,000 <br />ExpectedCashFlow: <br />FY16-17=$1,500,000;FY1717=$1,500,000;FY17-18=$8,600,000;FY18-19=$2,361,00019=$2,361,000 <br />Prior20112011-12 <br />Expenditure/Category:YearsEst.Act.Est.Act.2012-132013-142014-152015-1620162016-17Total <br />Design/Construction$0$0$0$0$0$0$12,461,000$12,461,000$12,461,000 <br />Other00000000 <br />TotalCost$0$0$0$0$0$0$12,461,000$12,461,000$12,461,000 <br />Page53PreliminaryFY12-13BUDGETANDCIPBUDGETANDCIP <br />