Document p2ebDG8OZbr3pqR8NwmKKNnpa

ft E A ~ UnitedStates ...,.., Environmental Protection , Agency Region6Enforcement&ComplianceAssuranceDivision INSPECTIONREPORT InspectionDate(s): 8/10/2023 MediaProgram: Water RegulatoryProgram(s) CWA CompanyName: TownofHighlandPark FacilityName: WastewaterUtilityDepartment FacilityPhysicalLocation: HighlandPark,UtilityServiceCenter,5005HollandAve. (city,state,zipcode) Dallas,TX75209 Mailingaddress: 4700DrexelDrive (city,state,zipcode) HighlandPark,Texas75205 County: Dallas FacilityPhoneNumber FacilityContact: 2145214161 StephenDavis sdavis@hptx.org I I PublicWorksSuperintendent FRSNumber: 110010935140 PermitNumber: TXU000120 NAICS: 221320 SIC: 4952 Personnelparticipatingininspection: StephenDavis TownofHighlandPark PublicWorksSuperintendent AlanVaughn EPARegion6 EnforcementOfficer DamonMcElroy EPARegion6 EnforcementOfficer EPALeadInspector Signature/Date Digitally signed by McElroy, Damon McElroy, Damon Date: 2023.08.25 15:38:27 -05'00' Supervisor Signature/Date DamonMcElroy Date Digitally signed by RO BERTO BERNIER ROBERTO BERNIER Date: 2023.08.28 10:05:27 -05'00' RobertoBernier Date 6ENFORM019R8.2(02/12/2020) 1  SectionI-INTRODUCTION TownofHighlandParkWastewaterUtilityDept. InspectionDateAugust10,2023 PURPOSEOFTHEINSPECTION EPARegion6inspectorsAlanVaughnandDamonMcElroyarrivedattheTownofHighlandParkPublic Worksofficeatabout9:00amonAugust10,2023,foranannouncedinspection.We(EPAinspectors) metwiththecityofficialindictedaboveandillustratedintheAppendix1signinsheet.Wepresented ourfederalcredentialidentifications.I(DamonMcElroy)informedthegroupthiswasanEPAinspection todeterminecompliancewiththeCleanWaterActregardingsanitaryseweroverflows(SSO)fromthe wastewatercollectionsystem.Thescopeoftheinspectionisacomplianceevaluationtodetermineif operationsandmaintenanceissufficienttopreventSSOs. FACILITYDESCRIPTION TheTownofHighlandPark(HP)servesapproximately8,900peoplethrough3,012residential,88 commercial,twoindustrial,and37multifamilyserviceconnections.TheTown'scollectionsystemis comprisedofgravitysanitarysewerpipesranginginsizefrom6inchto30inch.TheTowndischargesits sanitarysewagetotheDallasWaterUtilities(DWU)CentralWWTP.Twobasinsonthewestsideof Town,onebasininthenortheastpartofTown,andthecentralwastewaterbasindischargetoDallas throughaHPnewlyInsituformCIPPremediated30inchSScollectorthatfeedstoaDWUmeteredpoint ofentryatthelowestpointofthecollectionsystemattheDWU30inchRCPtransmissionline,asshown intheAppendix2,Photo2.TheTown'ssystemalsoservesasapassthroughfortheupstreamCityof UniversityParkandtheSouthernMethodistUniversity(SMU).UniversityParkandSMUSS(sanitary sewer)flowsareconveyedthroughtheTown'scentralbasinsystemanddischargedtothemetered dischargepointtoDWU.Thegravitymainsarecomprisedofthefollowing: HighlandParkSSPipeMaterialEstimateTable: PipeMaterial Approx.Composition (%) VC 20 PVC 26 RCP/CIPP 11 HDPE 35 Other 8 2  TownofHighlandParkWastewaterUtilityDept. InspectionDateAugust10,2023 SSOanalysis:TableBshowsthatoverthepastfiveyears,16SSOstotaling146,285gallonsoccurred.14 oftheseSSOs(88%)atover245,000gallonswerereportedasduetostormeventsindicatinghydraulic capacityandI/I(inflowandinfiltration)issues.FailuretopreventSSOsisshownasapublichealthand environmentalissuefortheTown.ArecuringSSOpointwasobservedasoccurringnearthecollection systemhydraulicdischargepointandalongtheTown's30inchRCPcollectormainasitapproachesthe DWU30inchtransmissionlinedischargepoint.ThenewHP30"CIPPSSmainmentionedabovehas alleviatedaprimaryissueofhydrauliccapacityandI/Iissuesinthisarea.ArecuringwetweatherSSO challengefortheTownremainsfromtheDWU30inchcollectorreportedtocausebackflow,dueto insufficienthydrauliccapacity,intotheHPcollectionsystemcausingbackuprelatedSSOsduringstorm events. TableB:TownofHighlandParkSSOsReportedfromAugust2018toCurrent ID Date Started Location 1 8/22/2022 MH#1MH403at LomoAltoDr. 2 8/22/2022 MH#1MH359at LomoAltoDr. 3 2/11/2022 MH#1MH33at DouglasAve. 4 2/12/2020 MH#3MH86at DouglasAve. 5 1/20/2020 MH#1MH3at WestsideDr. 6 2/12/2020 MH#3MH30at LomoAltoAve. 7 1/16/2020 MH#3MH27at LomoAltoAve. 8 1/16/2020 MH#3MH86at LakesideDrive. 9 5/18/2019 MH#3MH86at LakesideDrive. MH#s 10 10/16/2018 3MH30 12 3MH29 3MH86 MH#s 13 3MH130 16 10/15/2018 3MH27 3MH283 3MH86 Total=16SSOsat146,285gallons Typeof Overflow I/I,Storm Event I/I,Storm Event Grease I/I,Storm Event Construction I/I,Storm Event I/I,Storm Event I/I,Storm Event I/I,Storm Event I/I,Storm Event I/I,Storm Event Volumeof Overflow (Gallons) 6,300 42,000 520 9,600 630 6,240 4,620 24.640 13,500 19,650 43,200 SSOImpact DWUStorm Sewer TurtleCreek TurtleCreek TurtleCreek Streetandcurb only(ground) DWUStorm Sewer DWUStorm Sewer TurtleCreek TurtleCreek StormSeweror TurtleCreek StormSeweror TurtleCreek Description MHoverflow MHoverflow MHoverflow MHoverflow MHoverflow MHoverflow MHoverflow MHoverflow MHoverflow ThreeMHoverflows FourMHoverflows 3  SectionIIOBSERVATIONS TownofHighlandParkWastewaterUtilityDept. InspectionDateAugust10,2023 TheTownhasreachedbuildoutandhasmovedawayfromneedingnewwastewaterinfrastructure towardsrehabilitatingexistinginfrastructure.HP'sgoalistocontinuetorehabilitateorreplacethe collectionsystemtopreventfailuresaswellastoreducecapacityconstraintsondownstreampipes. Repair,maintenance,monitoring,andmaintainingproperSSflowwithinthecollectionsystemarethe city'sresponsibility.WastewatermaintenancefallsundertheCity'sPublicWorks(PW)department. BelowareCapacity,Management,Operation,andMaintenance(CMOM)programrelatedobservations: x Annualfundsarededicatedtoreplacingexisting6inchsewerlineswithminimum8inch sewerlinestoimprovecapacity. x Annualsmoketestingisdoneonabout10%ofitssystem(orabout25,000LFofSS mains)annuallytoidentifyandaddressI/Iissues. x AnnualCCTVassessmentonabout25,000LFofSSmainisconductedbasedoneither smoketestresultsorforgeneralmaintenance. x TheTownhasadequateordinanceandaprogramoutliningsewerdischarge requirements,includingFOG(fats,oils,andgrease),greasetraprequirementsfornon residentialdevelopments,restaurantorequivalentinspections,servicelateral responsibility,andmaintenanceprotocol. x TheTownwasnotedtoimplementadequatesafetyprotocolandtrainingresourcesfor itscrews. x TheTownoffers(yearround)curbsidecollectionandtwodropoffeventsannuallyand includeFOGasapartoftheHouseholdHazardousWasteprogram. x WWutilitystaffingisadequatebasedonEPA'sCMOMguidancemanual (reference https://www.epa.gov/sites/default/files/2015 10/documents/cmom_guide_for_collection_systems.pdf x TheTownhasstandardoperatingproceduresforrespondingtoSSOs. x TheTownownsandoperateslinecleaningequipmentincludingajettruckforsmall diameterlines(otherthan30inchTurtleCreekInterceptor)whichisusedtojetclean theTown'sSSsystematthegoalof1.5totwiceperyear. x HPvisuallyinspectsmanholesforconditionassessment,repairinganygroutingissueand ensuringplacementofrainguardstoaidintheabatementofinfiltration. 4  TownofHighlandParkWastewaterUtilityDept. InspectionDateAugust10,2023 x TheTownappliesrootkillerregularlyinareasofthesystemwithknownrootintrusion issues. x TheTownusesanenzymeformulatomitigategreasebuildupandodorsincommercial partsoftheTown'sSSsystem. x HPrespondstoSSrelatedcitizeninquiriesthroughtheCustomerRelationship Management(CRM)systemaccessiblethroughtheTown'swebsiteandoverthephone viacustomerservicethatgeneratesaworkorderasneededforresponse. x Adequatestafftrainingandcertificationisestablished.HPsewerpersonnelare supportedtomaintainaClassIIsewercollectionslicense. x TheCRMsystemiscurrentlyusedtotrackSSOsthoughaspreadsheet.TheTownhasa GISsysteminplacetomapsanitarysewerassets.Thetowniscurrentlydiscussing obtainingnewassetmanagementsoftwaretostreamlinetheWandWWutilityprogram process. x Adequateutilityfundsarebudgetedannuallytoaccountforoperations,maintenance, emergencyrepairsandreplacement. x ThehomeownerisresponsibletomaintainlaterallinesfromthetapinthestreetROW tothehome. SectionIII-AREASOFCONCERN ThefollowingconcernwasobservedanddiscussedtostopSSOs: 1. RecuringwetweatherSSOsarecausedbytheDWU30inchcollectorbackflowdueto insufficienthydrauliccapacity. SectionIV-SUGGESTIONS 1. EPArecommendsthatHPimplementaformalassetmanagementprogram.Anactive assetmanagementplanwillsupporttheTowntomanageandoperateutilityassetsata loweredcostaswellasjudiciouslyidentifycriticalinfrastructurerehabilitationor replacementprojects. 2. EPAsuggeststhatHPmayalternativelyconductCCTVanalysisafterjetcleaningfor targetedpipeareassuchasVCpipeandareasofthegravitysystemolderthan15years. 3. EPAsuggestsHPusetheEPAinformationalresourcesfoundonthewebsite:: https://www.epa.gov/npdes/sanitaryseweroverflowssoadditionalresources 5  SectionV-FOLLOWUP Therewasnofollowupaftertheinspection. SectionV-LISTOFAPPENDICES Appendix1- SigninSheet Appendix2 PhotoLog(threephotos) TownofHighlandParkWastewaterUtilityDept. InspectionDateAugust10,2023 6  TownofHighlandParkWastewaterUtilityDepartment InspectionDateAugust10,2023 Appendix1 SighInSheet  ! i'IR,........__.. AL IPROT.ECllON ADEYe'I' ~e 31il ~ sur sx, D'.t\S.1mt);2102 iUt: r : Tu I oU  TownofHighlandParkWastewaterUtilityDepartment InspectionDateAugust10,2023 Appendix2 PhotographLog UNITEDSTATESENVIRONMENTALPROTECTIONAGENCY PhotographLog PhotosNo.1 Location:HighlandParkPublicWorksBuilding Town:HighlandPark County:Dallas State:Texas PhotoFileNames: 20230810_102056.JPG(Left) 20230810_102101.JPG(Right) Photographer:DLM Time:10:20 Description:UtilityBuilding UNITEDSTATESENVIRONMENTALPROTECTIONAGENCY PhotographLog PhotosNo.2 Location:HighlandParkPublicWorksBuilding Town:HighlandPark I County:Dallas I State:Texas Town30inch NewCIPPSSLine r PhotoFileName:20230810_091012.JPG Photographer:DLM Time:9:10 Description:UtilityBuilding DWU30inch TransmissionLine --______ LXISTISG ...-\STE... = ,, _- -__-_-_--_---__ _ ., TEM ._.. '- HighlandParktoDWU PointofEntry UNITEDSTATESENVIRONMENTALPROTECTIONAGENCY PhotographLog PhotosNo.3 Location:HighlandParkPublicWorksBuilding Town:HighlandPark County:Dallas State:Texas PhotoFileName:20230810_104252.JPG Photographer:DLM Time:10:42 Description:HighlandPark30inchSSConnectionPointandmeteringMHtoDWU30inchCollector.