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Locating the Lead inPittsburghPWSA’s Strategy to Find and Replace Lead ServiceLinesSarah Bolenbaugh, P.E., Mott MacDonaldWill Pickering, Pittsburgh Water and Sewer AuthorityPittsburgh Water and Sewer Authority, Pittsburgh, PA
Locating the Lead inPittsburgh 2BackgroundTimelineLead Service Line InventoryLead Service Line Identification ProgramLead Service Line Replacement ProgramPost-Construction SamplingMott MacDonald PWSA Pennsylvania AWWA May 201807 May 2018
Pittsburgh Water and Sewer AuthorityBackground Water Utility with 80,000 Connections(71,000 Residential) Traditional corrosion control technologyemployed has been pH adjustment to 8.2using lime/soda ash. Open reservoir precluded phosphate use. Three main pressure districts withfourteen sub-districts. Infrastructure dates to pre-1900s June 30, 2016: Exceeded Lead ActionLevelMott MacDonald PWSA Pennsylvania AWWA May 2018307 May 2018
TimelineJanuary 2017:Curb BoxInspectionProgramJune 30, 2016:Exceed LeadAction LevelFebruary 2016:LSLR TrackingApril 26, 2016:PA DEPAdministrativeOrderSeptember 30,2016: MaterialsInventoryMott MacDonald PWSA Pennsylvania AWWA May 2018June 2017:LSLR ProgramHaltedMay 2017: CityWide LSLRProgramFall 2017:HistoricalRecordDigitization4April 2018:PWSA-fundedfull line LSLRNovember 2017:Consent OrderMarch 2018:UpdatedMaterialsInventory07 May 2018
Service Line Ownership PWSA Owned – Main to Curb Stopo Residential Service: 1” Diameter andLesso Single Unit Property Owner Responsibilityo Curb Box to Property – Residentialo Entire line – Commercial, Multi-UnitResidentialMott MacDonald PWSA Pennsylvania AWWA May 2018507 May 2018
Locating the Lead inPittsburghLead Service Line Identification6Mott MacDonald PWSA Pennsylvania AWWA May 201807 May 2018
Service Line Material IdentificationHistoricalRecordsCurb BoxInspectionHistoricalRecordServiceRecordCurb rNonLeadPossibleLeadVerifyNo DataNoneLeadLeadReplaceNo DataNoneNonleadLikelyNonleadVerify(2018)No DataNoneUnknownUnknownVerifySite VerificationMott MacDonald PWSA Pennsylvania AWWA May 2018707 May 2018
Historical Record Digitization Over 120,000 records Each Record Contains 1 to 8 half size(4”x5.5”) Sheets Labor Intensive Data Entry and QA/QC Public Side Complete December 2017 Private Side Complete May 2018 13/RecordMott 8MacDonald PWSA Pennsylvania AWWA May 201807 May 2018
Historical Record Digitization9 Positive Identification of Nonlead Historical Presence of Lead Indicator for Lead TailpieceTotal CurrentCustomer Records42,214Public Lead18,896Public NonLead29,162No Data512Mott MacDonald PWSA Pennsylvania AWWA May 201807 May 2018
Historical Record Digitization Low false negative rate(Historical records indicate nonlead, but found to be lead) High false positive rate(Historical records indicatelead, but line has beenreplaced with non-lead)HistoricalRecordsCurb BoxInspectionContract Excavation ResultRecord 122122231325356Mott MacDonald PWSA Pennsylvania AWWA May 2018Site Verification07 May 2018
Service Line IdentificationCurb Box Inspection Camera Inserted Down Curb Box 200-400 Inspections/Work Order Work Orders rotates around city Positive Identification for lead Not all materials can be determined Snap-shot of material Curb Box Relatively non-invasiveMott MacDonald PWSA Pennsylvania AWWA May 20181107 May 2018
Service Line IdentificationCurb Box InspectionLead Service LineMott MacDonald PWSA Pennsylvania AWWA May 2018Non-Lead Service Line12Unable to Determine07 May 2018
Curb Box Inspection PitfallsWhen the Curb Stop was ReplacedMott MacDonald PWSA Pennsylvania AWWA May 20181307 May 2018
Curb Box Inspection PitfallsWhen the Curb Stop was ReplacedHistoricalRecordsCurb BoxInspectionServiceRecordsSiteVerificationMott MacDonald PWSA Pennsylvania AWWA May 20181407 May 2018
Service Line Material Identification MatrixWhen do we dig?HistoricalRecordServiceRecordCurb rNon-LeadPossibleLeadVerifyCBINo DataNoneLeadLeadReplaceNo DataNoneNon-leadLikely NonleadVerifyCBINo DataNoneUnknownUnknownVerifyNon-leadN/ANo ActionNon-LeadNo ActionMott MacDonald PWSA Pennsylvania AWWA May 20181507 May 2018
Service Line Material IdentificationSite Verification (Excavation) Dig Test Hole to Confirm Material Type More Conclusive than CBI Disruptive to Traffic Restoration Costs Could Temporarily Increase Lead in Water Replace if Lead is FoundMott MacDonald PWSA Pennsylvania AWWA May 20181607 May 2018
Locating the Lead inPittsburghLead Service Line Replacement17Mott MacDonald PWSA Pennsylvania AWWA May 201807 May 2018
Lead Service Line Replacement TimelineJune 30,2016:Exceed LeadAction LevelJune 2017:LSLRProgramHaltedMay 2017:City-WideLSLRProgramMott MacDonald PWSA Pennsylvania AWWA May 2018April 2018:PWSAfunded fullline LSLR1807 May 2018
Lead Service Line ReplacementConsent Order RequirementsDEADLINELSLR REQUIRED(PUBLIC SIDE ONLY)June 30, 20181,341December 31, 20181,341*Total2,682Completed to Date820Mott MacDonald PWSA Pennsylvania AWWA May 20181907 May 2018
Private Side Lead Service Line Replacement 2018 – PWSA Funded Neighborhood Based Community Environmental Program Emergency ReplacementsMott MacDonald PWSA Pennsylvania AWWA May 20182007 May 2018
Private Side Lead Service Line Replacement 45-Day Notice for Partial Replacement Agreement No Restoration Trenchless InspectionMott MacDonald PWSA Pennsylvania AWWA May 20182107 May 2018
Communications and PostConstructionPre and Post Construction Notifications07 May 201872-Hour Post Construction Water Sample forPartial ReplacementsMott MacDonald PWSA Pennsylvania AWWA May 2018Water Pitcher Filter with ReplacementCartridges for Partial Replacements22
Lead Service Line Replacement Program OrganizationLSLR ProjectManagerCommunicationsManagerLead ProgramTechnical ealth & SafetyProject ct ManagerField LiaisonField LiaisonLSLR EngineerField Liaison –GoodGPS/SurveyLSLR EngineerSurfaceRestoration2018 LSLRConstructionManager2018 LSLRConstructionManager2018 LSLRConstructionManager2018 LSLRConstructionManagerLead ProgramCommunicationCoordinatorLSLR DataManager/GISAnalystLSLR EngineerLSLR GISAnalystCustomerOutreachField InspectionData h2018 CEPConstructionManager2018 torCustomerOutreachContractor CrewContractor CrewContractor CrewContractor CrewContractor CrewContractor CrewContractor CrewContractor CrewContractor CrewContractor CrewContractor CrewContractor CrewCustomerOutreachMott MacDonald PWSA Pennsylvania AWWA May 20182307 May 2018
SummaryIdentificationReplacement Understand the Accuracy of the Data Notification Requirements for PartialReplacements Realistic Timelines Post-Construction SamplingRequirements Updated Owner Contact Information Restoration/Agreements Community Involvement Staffing QA/QCMott MacDonald PWSA Pennsylvania AWWA May 20182407 May 2018
Thank you25Mott MacDonald PWSA Pennsylvania AWWA May 201807 May 2018
PWSA's Strategy to Find and Replace Lead Service Lines Locating the Lead in Pittsburgh Sarah Bolenbaugh, P.E., Mott MacDonald . Contractor Crew Inspector Contractor Crew 2018 LSLR Construction Manager Inspector Contractor Crew Inspector Contractor Crew 2018 LSLR Construction Manager Inspector
