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Home My WebLink AboutTIR-3902UnionAve3956NE24thStreetRenton,WA98059BI5002755StormwaterTIRForFullDrainageReviewJune17,2016Preparedfor:TuscanyConstruction,LLCPCBox6127Bellevue,WA980082067147161CITY0iRENTONRECEIVFDJUN23DEVELOPMENTSERVICESPreparedby:GRNLAKENGNEERING60454thAvenueNWSeattle,Washington98115Office:206-525-5332Cell:206-898-4269Email:bob.kehrli@greenlakeengineering.com .WtEENLAKIr1ENGINEERINGTABLEOFCONTENTSSection1:ProjectOverviewSection2:ConditionsandRequirementsSummarySection3:OffsiteAnalysisSection4:FlowControlandWaterQualityFacilityAnalysisandDesignSection5:ConveyanceSystemAnalysisandDesignSection6:SpecialReportsandStudiesSection7:OtherPermitsSection8:CSWPPPAnalysisandDesignSection9:BondQuantities,FacilitySummaries,andDeclarationofCovenantSection10:OperationsandMaintenanceManualFiguresFigure11hRWorksheetFigure2:SiteLocationMapFigure3A:ExistingDrainageBasinsFigure3B:ProposedDrainageBasinsFigure4:SoilsMapFigure5:OffsiteAnalysisTablesTableIA:ExistingAreasTableYB:ProposedAreasTable2:ControlOrificeDesignTable3:FlowFrequencyReturnPeriodsTable4:PipeConveyanceCalculationAppendIxesAppendixA:DesignDrawingsAppendixB:WWHMFlowControlCalculationsAppendixC:MaintenanceandOperationPlanAppendixD:BondQuantityWorksheetAppendixF:GeotechnicalReportGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEETPart2PROJECTLOCATONAND\DESCRIPTION?ProjectNameUflionAve.DOESPermit#...LocationTownship23Range_5-- . . .Section_4SiteAddress3956NE24thSt.Renton,WA98059PartSPLANANDREPORtINFORMATIONTechnicalInformationReportSiteImprovementPlan(Engr.Plans)TypeofDrainageReviewTargetedIType(circleone):FlLJMoifledI(circle):LargeSitemallSjDate(includerevisionDate(includerevision.dates):..---— -— - -———dates):DateofFinal:DateofFinal:DateofApproval:PartIPROJECTOWNERANDPROJECTENGINEERProjectOwnerTUSCaflYConstruction,LLCPhone206-714-6707.AddressPOBox6127Bellevue,WA98008ProjectEngineer!PPQttKehrH..CompanyGreenLakeEngineeringPhone206-525-5332lartS-t4PEOPPERMtTAPPUCATIQIULanduseServicesSuivisonIShortSubd.IUPDBuildingServicesM/FICommericali:::iClearingandGradingciRight-of-WayUseOtherPart4OTHERFEVlEW$ANEPERM1TSDFWHPAUShoreJineciC0E404ManagementDOEDamSafetyStructuralURockeryNautt/FEMAFloodplainESASection7COEWetlandsOther________!%iType(circleone):StandardIComplexIPreapplicationIExperimentalIBlanketDescription:(includeconditionsinTIRSection2)2009SurfaceWaterDesignManual11/9/2009 KINGCOUNTY,WASHINGTON,SURFACEWATERDE$IGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEETPart7MONITORINGREQUIREMENTSMonitodrRequired:Yes‘•°———-—-----StartDate:CompletionDate:PartB$tTECOMMUNITYANDbRAINAQEBASINCommunityPlan:.SpecialDistrictOverlays:..DrainageBasth:MPYCreekLakeWashingtonStormwaterRequirements:A1[LQht.poreandsixspecigirequirernents!:....•.;:Part9QNSITEANDADJ4CBSJS’N$TIVEAREAS,—ciRiver/StreamSteepSlope.Lake____________________________i::iErosionHazard...i:::iWet’andsLandslideHazard.-ClosedDepression.CoalMineHazard__________________L:IFloodplainSeismicHazard___________________c:iOther_____________________________1JHabitatProtection__________________.Li________Part1GSOtLSSoilTypeSlopesErosionPotentialgC6-15.rno??iQ_LiHighGroundwaterTable(within5feet)LiSoleSourceAquiferLiOther..—-- - - .- - .LiSeeps/SpringsLiAdditionalSheetsAttached2009SurfaceWaterDesignManual21/9/2009 KINGCOUNTY,WAsHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEET••.:••‘;: .:.•::.).. ---DNEEGNUMIThTIONSREFERENCELIMITATIONISITECONSTRAINTCore2—cffsite.Anatysis- - . . . .—LI5sitve/CriticjpIAres. . . _ _ . __ . ._ . ..SEPA.Other--— - - - --_________.AdditionalSheetsAttachedfartI2TIRSUMMARYSHT@ovideoneT1R$upay$JeeterAres)ThresholdDischargeArea:jmeord9c!1ptI9pL_. . . _ ...... .CoreRequirementsfall8apply)DischargeatNaturalLocationNumberoaturatDischargeLocations:2. . ..OffsiteAnalysisLevel:II213dated:FlowControlLevel;II23orExemptionNumber____________(mci.fadllftysummarysheet)SmallSiteBM.ConveyanceSystemSpillcontainmentlocatedat:. ... .ErosionandSecmentControlESCSiteSupervisor:tobedeterminedContactPhone:AfterHoursPhone:MaintenanceandOperationResponsibility:t/Public. . .IfPrivate,MaintenanceLojRequfred:INoFinancialGuaranteesandProvided:Yes/No-i?bjiy...... - . . . .WaterQualityType:asicSens.LakeIEnhancedBasicmIBog(includefacilitysummarysheet)orExemptiono..... .. . . ..—.- . -Plan:YesINo. . .SpecialRequirements(asapplicable)‘.....AreaSpecificDrainageType:CDAISDOIMOPIBPILMPISharedFac.INoneRequirements- - . . . .Floodplain/FloodwayDelineationType;MajorIMinorIExemptionI00-yearBaseFloodElevation(orrange):Datum:FloodProtectionFacilitiesDescribe:SourceControl‘‘Describetanduse:. .(comm.tindustriartanduse)Describeanystructuralcontrols:2009SurfaceWaterDesignManual1/9120093 KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEET?art14STORMWATERFACtLtTYESCR1Io;,(NeJnc1ujFaii‘nyündSkØtchFlowControljyp/escr1ptionWaterQualityTypelDescñptionStormlechBiofiltration---- . - - ““ ....UInfiltrationWetpoolRegionalFacility..MeUiaFiltrationPerkFilter::iSharedFacilityUojiContro’IFlowControlSpillControlBMP s —--.. . - . - . . . “ .. . - . “ -- . .- . -FlowControlBMPs1JOther--.---—— ..—- - _ . - -- - . - - - --—— . . .ciOtherOilControlHighuseSite:YesTreatmentBMP:_______________________________MaintenanceAgreement:Yes______withwhom?9jherDrainageStructures.Describe:Pat1.EROS.tONANDS..EDIMEN.CONTFOI• . • . .MINIMUMESCREQUIREMENTSDURINGCONSTRUCTiON::iClearingLimitsCoverMeasuresPerimeterProtection:iTrafficAreaStabilizationSedimentRetentioncSurfaceWaterCollectionIZIDewateringControlDustControl:iFlowControlMINIMUMESCREQUIREMENTSAFTERCONSTRUCTIONStabilizeExposedSurfacesRemoveandRestoreTemporaryESCFacilitiestJCteanandRemoveAllSiltandDebris,EnsureOperationofPermanentFacilitiesFlagLimitsofSAOandopenspacepreservationareasUOther______________________2009SurfaceWaterDesignManual41/9/2009 KINGCOUNTY,WASHINGTON,$URFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEETPartI5EASEMENTS/TRACTSJPart16STRUCTURALANALYSISiageEasementCastinPlaceVauttCovenant11RetainingWaIlNativeGrowthProtectionCovenantIRockery>4HighUTractStructuralonSteepStopeOtherUOtherPart17SIGNATUREOFPROFESSIONALENGINEER• .I,oracivilengineerundermysupervision,havevisitedthesite.ActualsiteconditionsasobservedwereincorporatedintothisworksheetandtheattachedTechnicalInformationReport.Tothebestofmyknowledg,tI)inforationrvidedhejisurate.,,::L:Ecr1///q%6- -- ---$d,ed/Datt- --2009SurfaceWaterDesignManual1/9/2009 PROJECTOVERVIEWTheproposedprojectconsistsofa2lotsinglefamilydevelopmentlocatedat3956NE24thStreetinRenton,WA.Thesiteiscurrentlymadeupoftwoparcelsthattotal29,640square-feet.Thetwolotswillbecreatedviaalotlineadjustmentandthisreportiscoversbothproposedlots.Theproposeddevelopmentwillresultinatotalof14,650square-feetofimperviousareaand14,990square-feetoflandscapedareaforbothlots.Theexistingeasementtothenorthwhichcontainspartofthedetentionsystemwillresultin2,065squarefeetofreplacedimperviousareaand3,440squarefeetofreplacedperviousarea.AccesstothetwolotswillbeviaaprivatedrivewayfromUnionAvenueNE.ThepropertyissplitbytwoseparatedrainagebasinspertheCityofRentonbasemap.Intheexistingcondition,thenorthernlotgenerallyslopesfromeasttowestwhilethesouthernlotslopesfromtheeasttothesouthwestcornerofthelot.Afterthegeotechnicalsiteinvestigation,itwasdeterminedthatthestormwaterforthenorthernlotcouldnotbehandledthroughinfiltration,thereforethenorthernlotdrainagewillbepipedtothedetentionfacilitylocatedinthesoutherlydrainagebasin.Thesoilson-sitearecategorizedasalderwoodgravellysandyloam.SeeFigure4:SoilsMapandtheGeotechnicalReportinAppendixF.GREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332Figure2:SiteLocationMapMapfromGoogleEarthPro,downloadedSeptember18,2015 FIGURE3kEXISTINGDRAINAGEBASINS—454--:E:DGOFFSE-1’BYGREENLAKEENOINEERNG1/29/2016BASIN(0.20--56APPROXIMATELOCATIONOFDRAINAGEBASINDIVIDEPERCITYMAP1”=30’DRAINAGEAREAAC)---.--,BASIN2(03AC)EXITBWG00Li)BASINPREPARED IFIGURE36:pQpOSEDDRAINAGEBASINS1”=30’0t)PREPAREDBYGREEN6/17/20160it)--56EXITBLDG\BASINEXITBLDG1cr1LAKEENGINEERINGIi FIGURE 4:SOILSKpBKpBNnSKpB:.1 A pBeD 1 .•D AgC EwC KpB AgC i::Renton City Limits Soil Type Rh KpC PITS 5k,.AkF L_]Potential Annexation Area L.AgS Fl Br KpD [E’Pc SmKpBiBA9BKpCEBGroundwaterProtectionAreaBoundary[AgC EvB r Ma Pk [SoSJj2ndStT)id Aquifer Protection Area Zone 1 •AgD EvC Ng Pu [TuKpBAgB-,Sk gc c I Aquifer Protection Area Zone I Modified AkF I EvD Nk Py Ur‘&r_JKPO ::]AmB EwC [“No RUCEwCf0—,:%L]AmC nA Or RdE;_4\41 ;‘—AgD L_An EJ InC Os Re,9EVCdE J ii t’1 I :‘:o :‘_;::AgKpB.1:;S RdE ‘AgD ‘Sm ‘AgD B BeD %4’‘aI;ton .IDAgc EVCD OvD ‘-::::Sh\t S ‘‘::1%.RdC !,‘///7//////J fl .\o”OvD‘%4%V////%///////J //////7c::j AgD,I 4 )‘/////V////Y //J//7////A I .AgDI-----;ILL,SN4%/%UISEI‘:!q /9:%c:’c:i :ic\ I /LC _i i %‘ %‘ ;gJp \P1T : r .SeC (F EvB )Wo 8e0 ,;ii’EvB ‘ Beo AgD L: r J PU \ Ur ‘1fl-“ 0 AgC [%(e \%c -S’iy2zthst Tu .i t _ii I (1 Pu:‘1 So ‘168thStjJ . ‘%% S134t,hSt :t N •‘/‘/4i Sk ‘k AgC j .4 fr Py ,F •,i g inC :‘•Sk t/AA AmC .‘..I’ —D ‘)%%%D •mc %\I J.. Pu 41st St : %g9 •;?9%ô AISB Ag \>‘‘ AgC ;\!TS 0)I , JF ,18’hSt SE ‘, \N\ AB AmB ,oA> w,-—.AgC dT Re Pu jr A9CI Ts*LAgC. AgO ‘ w rn51 :nic MiC 2OSthSt3 ‘;:EvB EvC EVE N’\%kcNo , :u.,Ng °.o, *bNoNB AgB . AgC .Date:01/09/2014SoilSurvey I 4 .1 j W-E .0 1 2 ‘v’Miles S City ofRenton•ToN l’uhhu VorLs C CONDITIONANDREQUIREMENTSSUMMARYTheproposedprojectwillresultinover5,000square-feetofimperviousarea.PertheKin9CountySurfaceWaterDesignManual2009(KCSWDM)andtheCityofRentonAmendmentstotheKCSWDM,theprojectwillberequiredtocomplywithCoreRequirements1-8andSpecialRequirements1-6.CoreRequirementsCoreRequirement#1:DischargeataNaturalLocationStormwaterplanshavebeenpreparedandareincludedinAppendixA.Althoughthetwoproposedlotsarelocatedinseparatedrainagebasins(SeeFigure3A),thereisnotaviablelocationtodischargestormwaterfromthenorthernlotandtheexistingsitesoilsmakeisinfeasibletoinfiltratestormwaterflowsonthenorthernlot.ThereforebothlotswillbeconnectedtothedetentionfacilityinthesoutherlylotandthendischargetotheexistingstormwaterpipeinNE23tdPlace.Althoughbothlotswillbedischargingtothesouth,andincreasingthetotalareaofthesoutherndrainagebasin(SeeFigure3B),thedevelopedflowdischargesforthetwoproposedlotsislessthanthepredevelopedcase,assumingtheexistingconditionisforested.Thereforewecanconcludethattherewillbeno“adverseimpactstodownstreampropertiescausedbydiversionofflowfromoneflowpathtoanother.”ThedetentionfacilitywillachieveaLevel2flowcontrol.(MoreexplanationincludedinCoreRequirement#3below)CoreRequirement#2:OffsiteAnalysisALevel1analysishasbeenperformedasrequiredandcanbefoundinOffsiteAnalysisSectionofthisreport.CoreRequirement#3:FlowControlTheprojectislocatedwithintheFlowControlDurationStandard(ForestedConditions)areaasdeterminedbytheCityofRentonFlowControlApplicationsMapReference11-AoftheCityAmendmenttotheKCSWDM.Sincetheproposedlots,whichincludesthedriveway,willresultinover5,000square-feetofimperviousarea,adetentionfacilityutilizingcontrolorificeshasbeendesignedtomeettheLevel2flowcontrolstandardpertheKCSWDM.TheWesternWashingtonHydrologyModel2012(WWHM)wasutilizedtosizeanddesignthedetentionfacilityandcontrolstructure,seeAppendixBforcalculations.CoreRequirement#4:ConveyanceSystemRunofffromthetwoproposedlotswillpassthroughthedetentionfacilityandbeconveyedbya8-inchstormdrainlinewithcapacitytoconveythe100-yearflowfromthedetentionfacility.Thelinewilldischargeflowstothesouthofthesitewithina10-footwideeasementGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 alongthewesternpropertylineofparcel778840-0020(3918NE23tdPlace)totheexisting12-inchstormdrainlinelocatedinNE23rUPlace.SeeTable3intheConveyanceSystemAnalysissectionforconveyancecalculations.CoreRequirement#5:ErosionandSedimentControlAnErosionandSedimentControl(ESC)Planhasbeenincludedalongwiththestormwaterplans,seeAppendixA.ThecontractorwillalsoberequiredtoprepareaStormwaterPollutionPreventionandSpill(SWPPS)PlandescribedinSection2.3.1.4oftheCityAmendmenttotheKCSWDM.BestManagementPracticeswillbeimplementedandmaintainedbythecontractortocontrolerosionandsedimentfromleavingthesite.CoreRequirement#6:MaintenanceandOperationsAMaintenanceandOperationsPlanhasbeenpreparedandisincludedinAppendixC.CoreRequirement#7:FinancialGuaranteesandLiabilityTherequiredbondswillbepaidbytheOwnerperSection1.2.7oftheCityAmendmenttotheKCSWDM.SeeAppendixDforBondQuantities.CoreRequirement#8:WaterQualityTheproposedimprovementswillcreatemorethan5,000square-feetofPGIS,thereforeBasicWaterqualitywillberequired.TheBasicWaterQualityOption8-Stormfilterwillbeutilizedandbelocatedimmediatelydownstreamofthedetentionfacilityon-site.SeeAppendixAfordesignandspecifications.SpecialRequirementsSpecialRequirement#1:OtherAdoptedRequirementsNoadditionalarea-specificrequirementsareapplicable.SpecialRequirement#2:FloodHazardDelineationTheprojectisnotadjacenttoafloodhazardarea.SpecialRequirement#3:FloodProtectionFacilitiesNofloodprotectionfacilitiesarelocatedonorwithinthevicinityofthesite.SpecialRequirement#4:SourceControlTheprojectdoesnotrequireacommercialbuildingofcommercialsitedevelopmentpermit.SpecialRequirement#5:OilControlTheproposedsitewillnothavehigh-usesitecharacteristics.SpecialRequirement#6:AquiferProtectionAreaTheprojectisnotlocatedwithinanAquiferProtectionAreaperReferenceMap11BoftheCityAmendmenttotheKCSWDM.GREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 OFFSITEANALYSISTheareaofreviewincludesthearealocatedimmediatelytothenorthandeastoftheprojectstwoproposedlots,theproposedprojectitselfaswellastheexisting12-inchstormdrainmainconstructedinNE23tdPlacewhichwasconstructedinthemid1990’saspartoftheHoneyCreekRidgedevelopment;aswellastheexistingpipedsystemdownstreamtothelimitofdownstreamanalysisasidentifiedonFigure5.Theexistingareatothenorthandeastofthesiteshowageneraltrendofdrainagetowardstheprojectsitewithnodefinableconcentrationofflows.Theexistingoffsiteareanortheastoftheprojectisrelativelywelllandscapedwithatotalareaofapproximately0.55acres.Theexisting12-inchcorrugatedpolyethylenepipestormdrainlineinNE23tdPlacehasaslopeof1.2percentpertheas-builtdrawingsdatedOctober16,1996.Thispipethereforehasacalculatedcapacityofover4cubicfeetpersecond.TheexistingpipeinNE23rdPlacedoesnotappeartohaveanycloggingorothercapacityissuesasobservedfromthestreetsurface.Withnochangestotheexistingoff-sitecontributingdrainageareasandanoverallreductionoftheon-sitepeakflowdischargerates,the12-inchlineinNE23tdPlaceshouldhavesufficientcapacitytoprovidethenecessarystormwaterconveyancefortheproposedlots.GREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 LUD111Z>cI14!,CILL>b\‘‘_f•.‘‘[•ai,IIIi;4I—-I-_,j%LlO,1Ffl>I—-0—_25C’IÜsEIiSIIiiNE24tJr1—ri-i1-W,-“frdP1\[irnhi___w11tI-•1(Th4-r1.NE23rdStçgEr•i\-‘—!\‘Is1iLiii45-tIiI-Ii;icJLRThSU___——-—,—.————--—I-—-———_—_’,_I__U-2NE2lstpJIll%lINEi9thSt::_____K-Ib——411__%!NEFIGUREIrI5:OFFSITEANALYSISLLJ1EU)0><w:Esz25thP1othItz::_SE,—-—IfcfIcfl4thSt100thStPROJECTSITE_.__t____—::It-IcI,....II’NE24thStINP22ndP1—IIInUStNE£S.LUz11htPierce(3d—Rim4I0ii’—LIM1TIikSAN%YSIS-IOFNE4________DOWNSTREAMDo:!%rJ*ç;—___I.-———11/20/2015PREPAREDBYGREENLAKEENGINEERING FLOWCONTROLANDWATERQUALITYFACILITYANALYSISANDDESIGNTheprojectsiteislocatedwithinaLevel2FlowControlarea,thereforetheproposedprojectwillneedtoprovidedetentionandflowcontroltomatchhistoric(forested)durationsforhalfofthe2-yearpeakflowthroughthe50-yearpeakflowaswellasmatchhistoric2-yearand10-yearpeakflows.TheproposedlotsutitizetheStormTechsystemasmanufacturedbyADSinordertoprovidethedetentionvolume.Thehousedownspoutsaswellastheimperviousdrivewaywillbetightlinedtothedetentionfacility.Runofffromamajorityofthelandscapedareaswiltbedirectedtothecatchbasinsandinletson-sitewithaminimalamountoflandscapedareaatthewestandsouthwestcornerofthesiteexpectedtoflowoffsiteasitdoesintheexistingcondition.ThecontrolstructureisdesignedperKCSWDM5.3.4.Awiththreecontrolorifices.DownstreamofthecontrolstructureisamediafiltrationdevicemanufacturedbyOldcastleinordertoprovidewaterqualityrequired.InordertodesignthedetentionandflowcontrolsystemWWHM2012wasused.ThepredevelopedandproposedareasareincludedinTable1Aand1Bbelow,thecontrolorificedesignisinincludedinTable2,andasummaryofthecalculatedPredevelopedandMitigatedflowscanbefoundinTable3.ThecompleteresultsofthesystemmodelingarelocatedinAppendixB.Table1A:ExistingAreasPredevelopedConditionSoilTypeLandUseArea—CForestFlat0.8067AcresTotal0.8067AcresTable1B:ProposedAreasMitigated(Proposed)ConditionSoilTypeLandUseAreaCLawnFlat0.4230Acres-Roof0.0974Acres-Driveways0.2863AcresGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332Total0.8067Acres Table2ControlOrificeDesign..OrificeDiameterOrificeOrifice.(inches)Height(feet)107720000021.0001.100030.8001.3300Table3FlowFrequencyReturnPeriods.PredevelopedMitigatedReturnPeriodFlows(cfs)Flows(cfs)Halfof2-year0.01580.01102-year0.03150.02205-year0.05200.035110-year0.06750.045925-year0.08920.062450-year0.10670.0770100-year0.12550.0937GREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 CONVEYANCESYSTEMANDANALYSISTheKCSWDMrequiresthatallnewpipedsystemshavesufficientcapacitytoconveythe25-yearpeakflow.Allproposedpipesmeetthisrequirement.Thecapacityofthe8-inchconveyancelinewithintheoff-siteeasementwascalculatedusingManning’sEquation.Theproposed8-inchlinerunningat0.3%hasacalculatedcapacityof0.86cfs.Theproposed100-yearpeakflowfromthedetentionfacilityiscalculatedas0.O94cfs,thereforetheproposedpipehasoverninetimesthecapacityofthecalculated100-yearflow.Table4UnionAvenue8”ConveyancePipeResults———,,—Flow,qL°4Setunits.;;;jrj[chejielocIty,vA648Wsec’vRpediameterdSInCheSotyheadh0288m.FlowareaL0324mA2Manningroughness.n?01.r-—--_--_——Nettedperimeter6384mPressureslope(possibly?equaltopipeslope).S003HydraulicrachusL0508rnPercentof(orratioto)fulldepth(100%orIifflowngfull)IfrconTopwidth,TL0000rn\’J—Froudenumber,FLOOShearstressttractveforce),tau9777i2jGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 -SPECIALREPORTSANDSTUDIESSeeGeotechnicalReportinAppendixFGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 OTHERPERMITSAconstructionStormwaterGeneralPermitisnotrequiredastheprojectwilldisturblessthanoneacre.GREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 cswPPPANALYSISANDDESIGNTheTemporaryErosionandSedimentControlPlan(TESC)hasbeenpreparedandisincludedaspartofthedesigndrawingpackageinAppendixA.ThecontractorwillberequiredtoprepareaSWPPSplaninaccordancewithSection2.3.1.4oftheCityAmendmenttotheKCSWDM.GREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 BONDQUANTITIES,FACILITIESSUMMARIESANDDECLARATIONOFCOVENANTABondQuantityWorksheetisprovidedinAppendixD.SeeAppendixEfortheDeclarationofCovenant.GREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 OPERATIONSANDMAINIENANCEMANUALSeeAppendixCGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 APPENDIXAGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 TABLEOFCONTENTSSHEETNUMBERflj1COVERSHEET2EROSIONCONTROL&TREERETENTIONPLAN3WATERMAINPLAN&PROFILE—--“STORMQRAIN&EWERPLAN6WARLITYDETAILS7STORMTECHDETAILS8STANDARDDETAILSNECORNERSEC4235%FOUNDMONINCASE___L._________:E95.00’I---L‘:IFOUNDMONUMENTINCASE‘I;..CD1U)ICITYOFRENTON#1838I!p:EASTOFSECLINE?IjsS88O422EIi(SECLINETO#1838)LlT525INE24THSTREETISN8619’45’555.5O’——————-—————._-(/t_LOTXTAX#3448900440J—___81945W37000—___JIZI!l----NE23RDPLACE__-----1E1/4CORNERSEC4—23—5°FOUNDMONUMENTINCASE———--—--——-—--—-FOUNDMONUMENTINCASECITYOFRENTON#716N005830”C661.23’GreenLakeEngineering,LLC60454thAve.NE,Seattle,WA98115Phone:206-525-5332Iemail:bob.kehrIiarenlakeengineeringç‘Contact:BobKehrli,PEDATE:_____________DATE._____________DATE:______________LflLflF—(N00LI)mH-LULUF-Cr)F-(NLU25(0La0N)PORTIONOFTHESE1/4,NE1/4SECTION4,TWP.23N,RGE.5E.,W.M.3956NE24THSTREETWATERMAINEXTENSION&STORMDRAINRENTON,WASHINGTONBUILDINGPERMIT#B15002755VICINITYMAPCONTACTNFORMATIONDEVELOPER:TUSCANYCONSTRUCTION,LLCP.O.BOX6127BELLEVUE,WASHINGTON98008OFFICEPHONE:2D6—714—67O7ENGINEER:GREENLAKEENGINEERING,LLCATTN:ROBERTKEHRLI,PE60454THAVENUENE,SEATTLE,WASHINGTON98115CELLNUMBER:206—898—4269OFFICENUMBER:206—525—5332.BOB.KEHRLI©GREENLAKEENGINEERING.COMSURVEYOR:HANSENSURVEYINGATTN:RODNEYHANSEN,PLS17701108THAVENUESE,PMB208RENTON,WASHINGTON98055OFFICENUMBER:425—235—8440-HANSENSURVEY@COMCAST.NETLEGALDESCRIPTIONBENCHMARKVERTICALDATUM:CITYOFRENTONNAVD88CITYOFRENTONCONTROLPT#1838CONC.MONINCASEATINTERSECTIONNE24THSTANDUNIONAVENEELEVATION=456.63FTTOPOGRAPHICANDBOUNDARYSURVEYPROVIDEDBYHANSENSURVEYING;GREENLAKEENGINEERING,LLCASSUMESNOLIABILITYFORACCURACYORCOMPLETENESS.BASISOFBEARINGBASISOFBEARINGSISCITYOFRENTONNAD83/91CITY#1838TOCITY716=S013353WPARCELA:BEGINNING1020FEETNORTHOFTHESOUTHEASTCORNEROFTHESOUTHEAST1/4OFTHENORTHEAST1/4OFSECTION4,TOWNSHIP23NORTH,RANGE5EAST,W.M.,THENCEN881921W,PARALLELWITHTHESOUTHLINEOFSAIDSOUTHEAST1/4,ADISTANCEOF305FEETTOTHETRUEPOINTOFBEGINNING:THENCECONTINUINGN8819’21”W,95FEET:THENCENO156’19”E,PARALLELWITHTHEEASTLINEOFSAIDSOUTHEAST1/4,ADISTANCEOF196FEET,MOREORLESS,TOTHENORTHLINEOFSAIDSOUTHEAST1/4,THENCESO156’19”W196FEET,MOREORLESS,TOTHETRUEPINTOFBEGINNING.LOTX,HONEYCREEKEAST,ACCORDINGTOTHEPEATTHEREOF,RECORDEDINVOLUME261OFPLATS,PAGES32THROUGH35,INKINGCOUNTYWASHINGTON.TAXPARCEL#3448900440PROPERTYADDRESS:24XXUNIONAVENE,RENTON,WA98059EASEMENTSSHOWNHEREONPERTITLEREPORTPROVIDEDBYCLIENT.IPFRN.,-2IPERND.RECOMMENDEDFORAPPROVALBY.BY:BY:CALL611HEPOREYOUDIGDATE:____ICITYOF;iRENTONPInning/Bui!ding/PUbIICWorksDept.WATERMAINEXTENSION&STORMDRAINTUSCANYCONSTRUCTION,LLCCOVERSHEET3956NE24THSTREET6/23/2016ITtOVER 6.Theerosionandsedimentationcontrolsystemsdepictedonthisdrawingareintendedtobeminimumrequirementstomeetanticipatedsiteconditions.Asconstructionprogressesandunexpectedorseasonalconditionsdictate,thepermiteeshallanticipatethatmoreerosionandsedimentationcontrolfacilitieswillbenecessarytoensurecompletesiltationcontrolontheproposedsite.Duringthecourseofconstruction,itshallbetheobligationandresponsibilityofthepermiteetoaddressanynewconditionsthatmaybecreatedbytheactivitiesandtoprovideadditionalfacilities,overandaboveminimumrequirements,asmaybeneeded,toprotectadjacentpropertiesandwaterqualityofthereceivingdrainagesystem.7.Approvalofthisplanisforerosion/sedimentationcontrolonly.Itdoesnotconstituteanapprovalofstormdrainagedesign,sizenorlocationofpipes,restrictors,channels,orretentionfacilities.9.WetseasonseasonalerosionandsedimentcontrolrequirementsapplytoallconstructionsitesclearingbetweenOctober1andMarch30inclusive,unlessotherwiseapprovedbytheCitythroughanadjustmentprocess.10.CovermeasureswillbeappliedinconformancewithAppendix0oftheSurfaceWaterDesignManual.14.DuringthetimeperiodofOctober1stthroughMarch30th,allprojectdistributedsoilareasgreater,thataretobeleftun—workedformorethan12hours,shallbecoveredbymulch,soddingorplasticcovering.15.Anypermanentretention/detentionfacilityusedasatemporarysettlingbasinshallbemodifiedwiththenecessaryerosioncontrolmeasuresandshallprovideadequatestoragecapacity.Ifthepermanentfacilityistofunctionultimatelyasaninfiltrationsystem,thetemporaryfacilitymustberoughgradedsothatthebottomandsidesareatleastthreefeetabovethefinalgradeofthepermanentfacility.16.Priortothebeginningofthewetseason(Oct.1),alldisturbedareasshallbereviewedtoidentifywhichonescanbeseededinpreparationforthewinterrains.Disturbedareasshallbeseededwithinoneweekofthebeginningofthewetseason.AsketchmapofthoseareastobeseededandthoseareastoremainuncoveredshallbesubmittedtotheCityofRentonforreview.LI)LI)(N00LI)DoF-DiDiH-DOZ0H-(NDiz(0LI)DoN)l,,-x.:,.:‘.—11.Thesenotesshallappearforallprojects—site)<.improvements,surfacewaterutility,wastewaterutility,,,waterutility,andtransportationplans:EROSiONCONTROLNOTESPORTIONOFTHESE1/4,NE114SECTION4,TWP.23N,RGE.5E.,W.M.2.Beforeanyconstructionordevelopmentactivityoccurs,apre—constructionmeetingmustbeheldwiththeCityofJRenton,publicworksdesignengineer.3.TheBoundariesoftheclearinglimitsandareasofvegetationpreservationasprescribedontheplan(s)shallbeclearlyflaggedbysurveytapeorfencinginthefieldpriortoconstructioninaccordancewithAppendix0oftheSurfaceWaterDesignManualandobservedduringconstruction.Duringtheconstructionperiod,nodisturbancebeyondtheclearinglimitsshallbepermitted.Theclearinglimitsshallbemaintainedbytheapplicant/ESCsupervisorforthedurationofconstruction.4.Stabilizedconstructionentrancesshallbeinstalledatthebeginningofconstructionandmaintainedfarthedurationoftheproject.Additionalmeasures,suchasconstructedwheelwashsystemsorwashpads,mayberequiredtoensurethatallpavedareasarekeptcleanandtrackouttoroadrightofwaydoesnotoccurforthedurationoftheproject.I2.TheESCfacilitiesoninactivesitesshallbeinspectedandmaintainedaminimumofonceamonthorwithin24hoursfollowingastormevent.13.Atnotimeshallmorethanone(1)footofsedimentbeallowedtoaccumulatewithinacatchbasin.Allcatchbasinsandconveyancelinesshallbecleanedpriortopaving.Thecleaningoperationshallnotflushediment—ladenwaterintothedownstreamNOTE:EXISTINGUTILITYLOCA11ONSSHOWNHEREONAREAPPROXIMATEONLY.ITSHALLBETHECONTRACTOR’SRESPONSIBILITYTODETERMINETHEEXACTVERTICALANDHORIZONTALLOCATIONOFALLEXISTINGUNDERGROUNDUTILIITESPRIORTOCOMMENCINGcONSTRUc11ON.NOREPRESENTATIONISMADETHATALLEXISTiNGUTiLITiESARESHOWNHEREON.THEENGINEERASSUMESNORESPONSIBILITYFORUTILITIESNOTSHOWNORUTILITIESNOTSHOWNINTHEIRPROPERLOCATION.CALLBEFOREYOUDIG:1—800—424—55558.Anyareasofexposedsoils,includingroadwayembankments,thatwillnotbedisturbedfortwodaysduringthewetseason(October1sttroughMarch30th)orsevendaysduringthedryseason(April1sttoughSeptember30)shallbeimmediatelystabilizedwiththeapprovedESCcovermethods(e.g.,seeding,mulching,plasticcovering,etc.).x*,1..x•‘:REMOVETREE(TYP.)!.;JCi5.Allrequiredsedimentation/erosioncontrolfacilitiesmustbeconstructedandinoperationpriortolandclearingand/orconstructiontopreventtransportationofsedimenttosurfacewater,drainagesystemsandadjacentproperties.Allerosionandsedimentfacilitiesshallbemaintainedinasatisfactoryconditionuntilsuchtimethatclearingand/orconstructioniscompleteandpotentialforon—siteerosionhaspassed.Theimplementation,maintenance,replacementandadditionstoAnyareaneedingESCmeasures,notrequiringerosion/sedimentationcontrolsystemsshallbetheimmediateattention,shallbeaddressedwithinsevenresponsibilityofthepermitee.(7)days..HYDROSEEDDISTURBEDOFF—SITELANDSCAPEDREPLACEDISTURBEDGRAVELAREASDUETODETENTIONFDRIVEWAYWITH4INCHESOF)./1,-1/4INCHMINUSCRUSHEDCONSTRUCTION,(TYP)SURFACINGBASECOURSE-S..:,.:i.L.)NE24THSTREET,2002040“.‘I:I:’.DRVJI..\Lx,,,. .x‘‘xSTABILIZEDCONSTRUCTION-5-....... . .ENTRANCEPERCITYOFRENTON-- -- -- - .. - - . .STANDARDPLAN215.10INSTALLSILTFENCEON...... ..::,ALLDOWNSLOPES......i.;:.,,.I..• .,•‘ ,‘PERCITYOFRENTONSTANDARDPLAN214.00‘,.. . ,. . .L.iNORUNOFFTOADJACENTPROPERTYDURINGAND/ORAFTERCONSTRUCTION—.-- .—— -—— -————5..(TYP.).z.‘,, .zUNE23RDSTREETz0GreenLakeEngineering,LLC60454thAve.NE,Seattle,WA98115Phone:206-525-5332email:bobkehrIi@gnlakeengineering,comContact:BobKehrli,PEhorizontalscalefeetRECOMMENDEDFORAPPROVALBY:_____________________________DATE:_____________BY:_____________________________DATE:_____________BY:____________________________DATE:____________BY:____________________________DATE:____________‘1(1::,xNO.REVISIONCALL611BEFOREYOUDIC1PERCITEREVIEWCOMMENTSRMKTd/3s/15IRMK[JWNSENSURVEYiNGSCALECITYOFWATERMAINEXTENSION&STORMDRAIN_______________________RMK2/15/16RMKI“—EROSIONCONTROL&TREERETENTIONPLANPERCITEREVIEWCOMMENTS__ __ ___ ___ ___ ___ ___ __ _ __ ______RENTONTUSCANYCONSTRUCTION,LLCFKEHRLLP.E.[°t.KEHRLI,Planning/Building/PublicWorksDept.6NE24THSTREEIL.c5’:WIWAMS,Pt.BYDATEAPPRI6/23/2016t1Rq LI)LI)C’)00LI)IDUiUiIDCI)IDF-(NUiIDLI)U)0)r)(STA3+92.0)3-5O3-1-00NOTE:EXISTINGUTILITYLOCATIONSSHOWNHEREONAREAPPROXiMATEONLY.ITSHALLBETHECONTRACTOR’SRESPONSIBILITYTODETERMINETHEEXACTVERTICALANDHORIZONTALLOCATIONOFALLEXISTINGUNDERGROUNDUTILIITESPRIORTOCOMMENCINGCONSTRUCTIONNOREPRESENTATiONISMADEThATALLEXISTINGUTILITIESARESHOWNHEREON.THEENGINEERASSUMESNORESPONSIBILITYFORUTILITIESNOTSHOWNORUT1LITIESNOTSHOWNINThE1RPROPERLOCATION.CALLBEFOREYOUDIG:i—800—4245555NOTES1.IFTHEEXISTINGCITYOFSEATTLEWATERMAINHASMORETHAN4.8—FEETOFCOVERTHENTHEPROPOSEOWATERMAINMAYCROSSOVERTHEEXISTING36”MAIN.IFTHEEXISTINGSEATTLEMAINHASLESSTHAN4.8—FEETOFCOVERTHENPROPOSEDMAINSHALLCROSSUNDERTHEEXISTINGMAIN.LOTIlPORTIONOFTHESE114,NE1/4SECTION4,TWP.23N,RGE.5E,W.M.HYDROSEEDDISTURBED/OFF—SITELANDSCAPED/AREASDUETODETENTiON////CONSTRUCTION,(TYP.)44-47.0,130’RTFIREHYDRANTASSEMBLYPERTHECITYOFRENTONSTD.PLAN310.1w/1O”xB”TEE(MJxFL)AND6”GATEVALVE\\\STA10”X10”POLYPIGSTATIONFORCLEANINGOFWATERMAINPERCITYOFRENTONSTD.1PLAN311...F-zREPLACEDISTURBEDGRAVELDRIVEWAYWITH4INCHESOF1—1/4INCHMINUSCRUSHEDSURFACINGBASECOURSESTA1+B1.O,12.5’RT‘C”IFIREHYDRANTASSEMBLYPERTHEICITYOFRENTONSTD.PLAN310.1Iw/1O”x6’TEE(MJxFL)AND6”GATEVALVE(FLxMJ),:1..STA4+52.E1—10”CAP(MJ)WITHCONCRETEBLOCKINGPERCITYOFRENTONSTD.PLAN330.2. . ...NE24THSTREETILSTA4÷37.51”WATERSERVICETOLOT1PERCITYOFRENTONSTD.PLAN320.14+40.51”WATERSERVICETOLOT2PERCITYOFRENTOHSTD.PLAN320.1._15.O’WIDEUTILITYEASEMENTTOI(\IIBEDEDICATEDTOTHECITYOF\L..L_RENTONFORNEWWATEBMAIN.(INPERCITYlOGATEVALVE(M]xMJ)‘:460STA4+40.5-1”WATERSERVICETOLOT2455STA4+50.010”X10”POLYPIGSTATION-450445STA4+52.5—’1—10”CAP(MJ)WTHCONCRETEBLOCKINGOTORTOPOThOLE&VERIFYDEPTHOFEXISTINGUTILITIESINUNIONAVE.NE.—H—.—ZD.Zii2”x10”TAPINGTEE(MJxFL)w/NTRENCHRESTORATIONPERCITYOF‘NNRENTONSTANDARDPLANHO32.1.CROSSINGWITHEXISNG36”CITYOFSEATTLEWATERMAIN(SEENOTE1)HALLQWEPSSG(SEENOTE1)• ••:460—20020406OtIZOntGIscolefeet2-I5O(SEENOTE1)10”GATEVALVE—’2+00WATEF,M1NPROFJLLSCALE:J”20HOR.1=5’VERT.460_———-—11-iOO455_---r:‘THAN4.8’‘?‘:I.02.5LF10DIPWATER.STA1+81.0MAINASSEMBLYSEPT45010GATEVALVE,.BLOCKPERST1-i5OBLOCKPERSTD.PLAN330.20+50PLAN330.3CALL611BEFOREYOUGreenLakeEngineering,LLC60454thAve.NE,Seattle,WA98115Phone:206.525-5332email:ContactBobKehrIi,PEVERTICALTHRUSTBLOCKPER5TH.PLAN330.2J97’CITYOFRENTONpIanning/BuiIdiflg/PUCWorksDept.RECOMMENDEDFORJkPPROVALBY:——DATE:BY:- .— -—DATE:BY’..-—------DATE:__—UCBY:___________________________DATE;WATERMAINEXTENSION&STORMDRAINTUSCANYCONSTRUCTION,LLCWATERMAINPLAN&PROFILE3956NE24THSTREET1I LI)LI)00LI)mF—b-iwH-CI)ELH-LUz(0LI)0GreenLakeEngineering,LLC60454thAve.NE,Seattle,WA98115Phone:206-525-5332email:bobkehrli@greenlakeengineering.comContactBobKehrIi,PECALL811WATERUTiLITYNOTESANDSPECiFICATIONSTHISINOTESSHALLAPPEARONPROJECTSFORTHEWATERUTILITY.1.AllworkmaterialshallbeinconformancewiththestandardsandspecificationsoftheCityofRentonPlanning/Building/PublicWorksDepartmentandthelatesteditionoftheWSDOT/APWAStandardsandSpecificationsasapprovedandmodifiedbytheCityofRentonintheRentonStandardPlans&Specifications.Asetofapprovedplansshallbekeptonsiteatalltimesduringconstruction.2.Thehoursofworkinthestreetrightofwayshallbelimitedto8:30AMto3:30PMonweekdaysunlessotherwiseapprovedinwritingbythePublicWorksDepartmentat430—7301.ThePoliceDepartment,FireDepartment,and911shallbenotified24hoursinadvanceofanyworkintherightofway.3.Alllocationsofexistingutilitiesshownareapproximateanditshallbethecontractor’sresponsibilitytoverifythetrueandcorrectlocationsoastoavoiddamageordisturbance.Forutilitylocatescall45—hourlocators500—424—5555.4.AnapprovedTrafficControlPlanisrequiredtobesubmittedatthePre—Constructionmeeting.5.DatumforVerticalControlshallbeNorthAmericanVerticalDatum1985Meters,andforHorizontalControlshallbeNorthAmericanDatum1953/1991MetersunlessotherwiseapprovedbytheCityofRentonPublicWorksDepartment.Referencebenchmarkandelevationsarenotedontheplans.6.AllwatermainpipeistobecementlinedductileironpipeconformingtoAWWA000andCliiorlatestrevision,thicknessClass52.CementmortarliningandsealcoatingshallconformtoAWWAC104orlatestrevision.Pipejointstobepush—onormechanicalBeddingtobeClassC.AllductileironpipeandfittingsshallbepolyethylenewrappedperANSI/AWWAC105/A21.5—93Standards.7.Castironandductileironfittingsshallbecementlined,pressureratedasnotedonplans,andinaccordancewithANSI/AWWACJ1D/A21.1O—87.CementliningshallbeinaccordancewithANSI/AWWAC104/421/4—9O.Iffittingsare3to12inchesindiameterandhavemechanicaljoints,thefittingsshallinaccordancewitheitherANSI/AWWAC11D—A21.1O—87orANSI/AWWAC153/A21.53—94.Three(3)inchto12inchdiameterfittings,whichhavemechanicaljointsand/orflangedjoints,shallbeinaccordancewithANSI/AWWAC110/A21.10.57oracombinationofANSI/AWWAC11D/A21.1D.57andANSI/AWWAC153/A21.53—94suchthattheportionofthefittingwithamechanicaljoint(s)maybewithANSI/AWWAC153/A21.53—94andthatportionofthefittingwithflangedjoint(s)shallbeinaccordancewithAWWAC110/A21.10—57.Acceptancetestinginaccordancewithsection53.53ofANSI/AWWAsection10—4.3ofANSI/AWWAC110/A21.1D—87shallbeobtainedbythecontractorandtransmittedtotheowner.5.Gatevalvesshallbeironbody,bronzed—mounted,doublediscwithbronzewedgingdeviceand0—ringstuffingbox(AWWAC500)orofresilientseatedtype(AWWAC509).Valvesshallbedesignedforaminimumwateroperatingpressureof200psi.DatevalvesshallbeClowList14,MuellerCompanyNO.A2380orM&H.9.FirehydrantsshallbeCoreytype(openingwiththepressure)orcompressiontype(openingagainstpressure)conformingtoAWWAC—502—55witha6inchmechanicaljointinletandamainvalveopening(M.V.O.)of5—1/4inch,two2—1/2inchhosenozzleswithNationalStandardThreads7—1/2threadsperinchandone4inchpumpernozzlewiththenewSeattlePattern6threadsperinch,60degreesV.Threads:outsidediameterofmalethread4.875androotdiameter46263.Hydrantsshallhavea1—1/4inchpentagonoperatingnutopenedbyturningcounterclockwise(left).10.Thetwo2—1/2inchhosenozzlesshallbefittedwithcastironthreadedcapswithoperatingnutofthesamedesignandproportionsasthehydrantstemnut.Capsshallbefittedwithsuitableneoprenegasketsforpositivewatertightnessundertestpressures.11.The4inchpumpernozzleshallbefittedwithaStorzadapter,4inchSeattleThreadx5inchStorz.Storzadaptershallbeforgedand/orextruded6061—T6aluminumalloy,hardcoatanodized.Threadedendportionshallhavenolugsandtwosetscrews150degreesapart.Storzfacetobemetal,nogaskettoweather.Storzcaptohavesyntheticmoldedrubbergasket,andshallbeattachedtohydrant0Cadopterwith1/5inch,coated,stainlesssteel,aircraftcable.12.Firehydrantsshallbepaintedwithtwocoatsofpaint.Preservativepaintnumber43655safetyyelloworapprovedequal.13.Pumperconnectiontofaceroadwayassembly.14.FirehydrantsshallbeinstalledperCityofRentonStandardDetailforfirehydrants,latestrevision.15.Allwatermains10inchesandsmallertomaintainaminimumcoverof36inchesbelowfinishgrade.Allwatermain12inchesandlargershallbeataminimumof45inchesbelowfinishgrade.Whereutilityconflictsoccur,watermainsaretobeloweredtoclear.16.Allwatermains6inchesandlargerindiametershallbecleanedwithpipecleaning‘PlGS”priortodisinfection.The‘Foiypigs”shallbeCirardIndustriesAquaSwab—ASorapprovedequal,2lb/cu.ft.densityfoamwith90Adurometerurethanerubbercoatingontherearof‘PlG”only.17.‘PIGS”shallbecylindershapedwithbulletnoseorsquareend.Thecontractorwillperformthecleaningoperation.IS.Allwatermainsandservicesshallbepressuretestedtoaminimumof200psior150psioveroperatingpressure,inaccordancewiththespecificationsoftheCityofRentonandtheWashingtonStateHealthDepartment.AllpressuretestingshallbedoneinthepresenceofarepresentativeoftheCityofRenton.ThequantityofwaterlostfromthemainshallnotexceedthenumberofgallonsperhouraslistedinCityofRentonStandardPlans&Specifications7—11.3(11).Thelossinpressureshallnotexceed5psiduringthe2hourtestperiod.19.Allwatermainsandservicesshallbedisinfectedbytheinjectionof050ppm(minimumconcentration)chlorine/watersolution.DryCalciumHypochloriteshallNOTbeplacedinthepipeaslaid.Chlorineshallbemetered/injectedinaccordancewithSection711.3(12)Eor7—11.3(12)FoftheStandardSpecificationsreferencedabove.20.Apre—constructionconferenceisrequiredpriortoanyconstruction.Aminimumoffiveworkingdaysnoticeisrequiredfarscheduling.21.Twenty—four(24)hoursnoticewillberequiredpriortostartingnewconstruction.22.Itshallbethecontractor’sresponsibilitytosecureallnecessarypermitspriortostartingconstruction.23.Installationofcorporatestops,waterservices,linesandmetersshallnotbedoneuntilallserviceagreements,meterapplications,constructionpermits,andpaymentoffeeshavebeenmadetotheCityofRenton.24.AllconnectiontoexistingmainsistobeaccomplishedbytheCityofRenton,exceptwettaps,whichmaybemadebyapprovedwettapcontractorswithpriorapprovalfromthePublicWorksDepartment.Allnecessaryexcavationandmaterialsaretobesuppliedbythecontractorandbeon—sitepriortoCitynotifications.25.InspectionwillbeaccomplishedbyarepresentativeoftheCityofRenton.Itshallbethecontractor’sresponsibilitytonotifyDevelopmentServicestwentyfour(24)hoursinadvanceofbacklillingallconstruction.Thecontractor,aswellastheengineers,shallkeepas—builtdrawings.26.Contractortoprovideplugsandtemporaryblow—offassembliesfortestingandpurityacceptancepriortofinaltie—in.27.Alljointrestraintsystems(shacklerods,nuts,bolts,etc.)shallbeasmanufacturedbytheStarManufacturingCompanyofColumbusOhio,orequal,approvedinwritingbythePublicWorksDepartment.28.Asphaltandconcretestreetpavingshallbesawcuttoaminimumdepthoftwo(2)Oilmatstreetsmaybespadecut.Allsurfaceconcrete,pavement,sidewalks,curb,gutters,anddrivewayapproachesshallbesawcuttoaminimumdepthoftwo(2)inchesorremovedtoanexistingexpansionjoint.29.Atemporarycoldmixasphaltpatchshallbeplacedonthedayofinitialexcavationwithapermanent,sealedpatchtobeplaced,toCityofRentonpolicy,within10days.Callforsubgradeinspectionpriortoplacementoffinalpatch.*30.ForCityprojectssuchastelemetryconduit,thePVCpipeusedshallbeAllchemicalprocesslinesshallbeschedule50PVCpipe.Schedule40inunimprovedareasandschedule50PVCpipeunderimprovedareas.PORTIONOFTHESE1/4,NE1/4SECTION4,TWP.23N,RGE.5E.,W.M.%1;R!L—.swz..*’Ebi!K1rhI,.“J.CONNECTIONWATERMAiNWtTHSTi.PUN300.1;e’:TAPPINGTEE&VALVEI‘Nir‘s.o:J:_:ct,}iIi/E*OCALrejsrcrpo,yp,coscsrATDs:-,,:i.;”-..rPOLYPIGSTATtONFORcLEANINGOFSFDPW(-300.6-*WATERMAINSw‘‘‘e‘wm‘i‘F-V-HRb-HYflR%NTAZ(FHBv-.,,,,‘3.,‘!-Fw..CUT*F_—j-:T--//Et’J--t_*//.c_ _1,,,/*_aM.3/41**E”,ID-JA,-:f’I““fTANDIWATERSERVICE?N-3201THiLL/5,/:.EzEWEHYDRANTASSEMBLY[‘4*BEFOREYOUNO.REvISION55jhNSEtLY.6ILLItIE.jSCALE0.KEHRLI,P.E.RF-,PEIIBYDATEAPPRC*ECITYOFRENTONDATUMPlanning/Building/PublicworksDept.WATERMAINEXTENSION&STORMDRAINTUSCANYCONSTRUCTION,LLCWATERDETAILS/NOTES3956NE24THSTREET6/23/2016$,€‘4•8DETAWUS NOTE:EXISTINGUTILITYLOCATIONSSHOWNHEREONAREAPPROXIMATEONLY.ITSHALLSETHECONTRACTOR’SRESPONSIBILITYTODETERMINETHEEXACTVERTICALANDHORIZONTALLOCATIONOFALLEXISTINGUNDERGROUNDUTILIIThSPRIORTOCOMMENCINGCONSTRUCTION.NOREPRESENTATIONISMADETHATALLEXISTINGU0L111E5ARESHOWNHEREON.THEENGINEERASSUMESNORESPONSIBILITYFORUTILITIESNOTSHOWNORUTILITIESNOTSHOWNINTHEIRPROPERLOCATiON.CALLBEFOREYOUDIG:i—SOO—4245555J---1LOLI)00LI)mwLUF-CI)ZLEF-(NLUz(0LI)00Fr)PORTIONOFTHESE114,NE1/4SECTION4,TWP.23N,RGE.5E.,WM.,/(6”INV=449.OO‘N6”SIDESEWER(INSTALLATiONPERCORSTD.PLAN406.1.(EX8”INV=44O.42,-----CONNECTDRAIN2OLE4”PVC@2.0%SLOPEVARIES,2:1MAXSTD.PLAN200.0,‘--‘—FG=455.3O5.204”MIN.CSS“B”ASPHALTICCONCREI/PAVEMENT—2—2”LIFTSREQUIRED6”MIN.CRUSHEDSURFACINGTOPCOURSECRUSHEDSURFACINGBASECOURSETOBEDETERMINEDBYFIELDCONDITIONSE‘—EXTRUDEDASPHALTCURBLI6”PVC©2.5%SCALE:N.T.S.TTOROOFDRAIN450.80.‘:CONTROL0.386”INV45(21LF6”PVC©.4”PERFPIPESUBDRAININV=449.38,—MIN1MUMFINISHEDGRADEELEVATIONIABOVESTORMTECHDETENTION/STRUCTURE=453.906I.‘:,_....‘NE24THSTREETCURBADJACENTTO:CATCHBASINPERCITYOFRENTON.:STANDAROPLAN101.11+00Hz—zz.‘—2O.O’WIDECEMENTCONCRETEDRIVEWAYENTRANCEPERCITYOFzRENTONSTANDARDPLAN104.1zC‘...TYPE1CB/PERCORSTD.PLAN200.00RIM452.OOINV’45O.2530.0’WATER,STORM,UTILITYANDACCESSEASEMENT——11TYPE2CBEO/DIVERSIONSTRUCTURE#21RIM=457.251IlINV=449.88III_“EXTRUDEDASPHALTCURB:TC=4585O—...horizontolsColefBetFG=452.9O‘Ill—ISOLATORROW(FG=4S6.BJ‘—TYPE2CBDIVERSIONSTRUCTURE#1RIM=453.9OINV=449.88142LF6”3©0.3%::i:.—1O’STORM.DRAINEASEMENTCONNECTTOEXTYPE1CBEX12”INV=446.61REPLACECURBPERCORSTD.\i—TYPE1CBPLAN101.1\/PERCORSTD.PLAN200.0\LJIRIM=451.7547LF12”\/12”NV447.1ZCPE@1.2%\/6”INV=447.17=_=:NE23RDSTREET1.2.GreenLakeEngineering,LLC..60454thAve.NE,Seattle,WA98115Phone:2O6-5255332email:bob,kehrIgflkneetomContactIBobKehrli,PE3.NOTES,..ALLINDIVIDUALFLOWCONTROLDMP’sSHALLDEPRIVATELY‘,.OWNED,MAINTAINEDANDKEPTINDODDREPAIR.::ALLUTILITIESSERVICINGTHESITESHALLDE.‘UNDERGROUND...PROVIDEETHAFOAMPADWHENVERTICALSEPARATION.BETWEENUTILITIESISLESSTHAN1FOOT.:..REPMMENDEDFORAPFRPVAL!BY:_____________::BY.. . . . . .. . .DATE:_—.BY:. ..DATE:CALL611BEFOREYOU______ciTyOF;iRENIONpI0nnng/BuiIding/PubIcWorksDept.WATERMAINEXTENSION&STORMDRAIN3O16TUSCANYCONSTRUCTION,LLCSTORMDRAIN&SEWERPLANL3956NE24THSTREET H-wLUF-GOJIZF-(NLUx(0(00)(0GreenLakeEngineering,LLC60454thAve.NE,Seattle,WA98115Phone:206-525-5332email:bob.kehrli@greeiContact:BobKehrli,PEPORTIONOFTHESE1/4,NE1/4SECTION4,TWP.23N,RGE.5E.,W.M.FRAMEANDSOLIDCOVERMARKED“DRAIN”WITHLOCKINGBOLTSINV=450.71ORIFlCE=0.80”FROMCHAMBER12”INV449.88INV=45O.48OR1FICE=1.00”<IaIFROMUNDERDRAIN4”INV=449.38U-0TOPERKFILTERINV=449.38-SHEARGATEWITHCONTROLRODFORCLEANOUT/DRAIN(RODBENTAS\REQUIREDFORVERTICALALIGNMENT\WITHCOVER)SEEKCRSDWG.2—026PIPESUPPORT(TYP.)WashingtonLLGULD*RESTR1CTORPLATEW/0.772”ORIFICEFLOWCONTROLSTRUCTURESCALE:N.T.5.FiELDREMOVABLEWATERTIGHTCOUPLINGORFLANGEFALSEFLOOR.6”MIN.3.4.5.6.*Notes:7.PrecastconcretestructureshallbemanufacturedinaccordancewithASTMDesignation(478.2.FittersystemshaDbesuppliedwithtrafficrated(H20)betted&gasketed036’circularaccesscoverswithrisersasrequired.Fieldpoutedconcretecollarrequired,byothers.Inlet&outletpipetslaretobe018.00”maximum.tnletpipesmustenterthestructureintheintelbay.Isletchambershallbesuppliedwithdrain-downdevicedesignedtoremovestandingwaterbetweenstormevents.Minimumseparationbetweeninvertin&invertvolisoutetpipediameterplus4.00’.FordepthslessthenspecifiedminimumscontactOtdcastte®StormwaterSolutionsforengineeringassistance.TreatmentFlowRatesshownconformtoWashingtonStateGULDSpecificatIonsMinimumDepthPIPESIZEut.tm08.05’Ieio.ov-0i2.t0ø1o.voI018.00’CARTRIDGETYPEioOUTLETTflOUTLETTOOUTLETASSPECIFIEDMINIMUMMINIMUMMINIMUMDEPTHRIMDEPTHRIMDEPTHRXiTOOUTLETTOOUTLETTOOUTLETELEOWRESTRICTORø48.00PERKFILTERTREATMENTFLOWRATES,TOTALFLOWCAl5sToTTToISCALE:N.T.S.12’STACKTREATMENTOUANTIfl’FLOWRATE5PMICF5IIt’f\PerkFilterTMOicicastie644048.00”ManholeStormwaterSolutionsWashingtonStateGULD__________________________F,,OnetoTwoCartridges/StacksPBMH48.wAIRIIIS,4/2/I5ISETTIUT2TOTALFLOCCAPACITYlCF5lMANHOLEACITIES&MAXIMUMHEADLOSSUURATlONTREATMENTTOTALFLOWFLOWRATECAPACITYIGPMICFOIICFUI12’&12’TREAThIENTTOTALPLOWFLOWNATECAPACITY10PMICFSICFOI12&it’£c.TREATMENTFLOWRATE10PM/CF5ITOTALFLOCICFSIt1PerkFilter7M048.00°ManholeWashingtonStateGULDRsoa:eOnetoTwoCartridgesIStacks0StormwaterSolutions75215osthpoWPloeo.5,502001LITUHee,COI8UI2UIPE:sD5.57t.8 tItloIdosOstoeM*oMs.eOmIPF-MH-48-WAINRIsAvIL’4/27/15SHECT2012RECOMMENDEDFORAPPROVAL‘.— - ——DATE:_____________CALL611BEFOREYOUDIGBY:____________________________DATE:____________eoW5:s,Tss’CITYOF;:iRENTONPlonning/BuildiTg/Pub lic WorksDept.BY:___________________________DATE:____________e._____________________________DATE:_____________WATERMAINEXTENSION&STORMDRAINTUSCANYCONSTRUCTION,LLCFLOWCONTROL&WATERQUALITYDETAILS3956NE24THSTREET ACCEPTABLEFILLMATERIALS:STORMTECHSC-310_CHAMBERSYSTEMSMATERIALLOCATIONDESCPJPTIONLI)LI)00LI)mH-wwF-CAF-CAz(0LI)0)ND1ONEBLAVER)TO1rf45O)A8OVEThECOMPACTIONIDENSITYPFDIIIRFMFNTHAMaERSFROMThEFOUNDAflONSTONEA’AYER)TOThEVLAYERABOVEORANOLARWELL-GRADE000UAGGREAAVEMIXTURES.<35%CLEAVECRUSHED,ANGULARSTONE,NOMINALSIZEOISTRIBUTIONBETINEEN3W2NCH(2O5O<)OVEERIBUTIONRERVEEN334-2INCH(2A5O<<,)ROMThYSABGR0000PTOTHEFOOT(BOTTOM)3,357,44575,56,51COM000TA000TONALLAYERSIN5f150sos)MABNOTT00000EO12,000Es(53AN).OYNARIC:FORCENOTTOEXCEEO2O,OOOtb59kNAANGULARNO4(MSHTOM43)STONE<.2.STORMTECHCOMPACTIONR000IREMENTSAREMETFORA’LOCAT(ONMATERIALSWHENPERCEDASOCOMPACTEDINB(150ss<3fMAX)UFTSUSINGTWOFULLCOVERAAESWIERAVRRATORYCOBPACTOR&VBIEREiNFETRAOONSURFACESMAYBECOMPROMISEDBYCOMPACTiON,FORSSANABROOEStGNL000CONOrnONS.AFLATSURFAEEMAYBEACHIETEDBYRARNGORSRAGGINGWITHOATCOMPACAONtSEENOTE6)(CANBESLOP000RV005CAL)12(3O9oss)MIN—--PORTIONOFTHESE1/4,NE114SECTION4,TWP.23N,RGE.5E.,W.M.00<0z12OUTLETTO-INLETMANIFOLD6’NOTES:48”DIA.TYPE2CATCHBASIN_ _ _ _ _ _ _ _ _ _ _ [5(15O,<)SYASOAROSPECIFIEROONFORPOLYEIBYLENE(PE)CORRUGATEOWALLSTORMWATEROOLLECTIONC000BERSCATCH4’ThYE7ONCELAYERVSELACEO.ANYSOFJMATERIBLCAJBREPLACEDINLAYER’OAPTOThEFINISHEBGRADE.MOSTPAVEMENTSUBBASESOOSCANBEOSEDTOREPERCEThEMATERALREOUIREMENTSOFCASTINPLACEWEIRWALLGEABYNThERER8O1TNONWOVENGEOTEEflLELAOSSET0ANDIVERSIONDIVERSIONSTRUCTURE#1STRUCTURE#2\\12’(3OOo)HOPEACCESSRPEREQUIRED‘\\OVERSOFABSGEOSERTHETICS3I5WTKV<3VENSC-310ISOLATORROWDETAILINSPECTION&MAINTENANCEft<4.LOWERACABEABINTOISOiATORROWFORVISUALINSPE500NOFSEOIMENTLEVELB(OPTTONAL)A5FSEOIMENTSAT.ORABOVE.3(BBsss)PROCEEDTOSTEP2FNOTPROCEEOTOSTEP3.B2USINBAFLASHUGHT,INOPECTOOWNEREISOLATORROWVER030HOUTLETEiPEI)BURRERSERPOLESORCAMERASMAYBEUSFOTOAVOIDACONFINED5PACEENTRYB)FOUOWOSHAREUULAOONSFORCONFINEOSPAcEENTRYIFENTERNOMANHOLER3PSEDIMENTSAT,OROBOVE,3tS5VPROCEEDTOSTEP2FNOT,PROCEEDTOSTEP3A-AFIXEOCULVEBTCLEANINUNOZZLEWITHREARFACINGSPREAD0F45’(I1T)GRMOREISPREFERREDSLEP3)REPLACEALLCOVERS,GRATESFILTERS,ANDLIOS,RECORDOBSERVATIONSMBDAGITONS.NOTESOBSERVATIONBOFSEDIMENTACCUMGLATIONANDHIGRWATERELEVATIONS.NOTESYRHb(SOOBUWThGE<3OUBBT3RKNLJ:LE2URCGWTTRGSEOFOPENGRATE<IU’(25005U)AOSNI2INSERTATEETOBECENTEREDSO3SDCBAMBER6”INLET,(DIVERSION4IHNHIOF7SC-310INSPECTIONPORTDETAILGreenLakeEngineering,LLC60454thAve.NE,Seattle,WA98715Phone:206-525-5332email:bob.kehrjgeenIakeengineering.comContact:BobKehrli,PEt()•J@)VLT\!‘HV400091.PROVIDEREINFORCING,#4REBAR©12”O.C.INWEIR.2.GROUTWEIRWALLTOINSIDEOFCATCHBASIN.12”OUTLETTOISOLATORROWINV=449.88RECOMMENDEDFORAPPROVALBY:-DATE:____________BY:____________________________DATE:____________BY:____________________________DATE:____________BY:____________________________DATE:____________ND.STORMTFCHDIVERSIONSTRUCTURESSCALE:N.T.S.CALL811BEFOREYOU010CITYOFIWATERMAINEXTENSION&STORMDRAINRENTONTUSCANYCONSTRUCTION,LLCSTORMTECHDETAILSNCTTIT9/BuiIdIflg/PubIiCWorksDept.I3956NE24THSTREET6/2/2D16]STOM 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APPENDIXBGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 WWHM2012PROJECTREPORTProjectName:20160615-ASiteName:UNIONAVE.SiteAddress:3956NE24thSt.City:RentonReportDate:6/15/2016Gage:SeatacDataStart:1948/10/01DataEnd:2009/09/30PrecipScale:1.17Version:2015/01/28LowFlowThresholdforPOC1:50Percentofthe2YearHighFlowThresholdforPOC1:50yearPREDEVELOPEDLANDUSEName:Basin1Bypass:NoGroundWater:NoPervioiisLandUseAcresC,Forest,Flat.8067PerviousTotal0.8067ImperviousLandUseAcresImperviousTotal0BasinTotal0.8067ElementFlowsTo:SurfaceInterflowGroundwaterMITIGATEDLANDUSEName:Basin1Bypass:NoGroundWater:NoPerviousLandUseAcres C,Lawn,Flat.423PerviousTotalImperviousLandUseROOFTOPSFLATDRIVEWAYSFLATImperviousTotalBasinTotal0.423Acres0.09740.28630.38370.8067ElementFlowsTo:SurfaceInterfiowGroundwaterSSDTable1SSDTableName:SSDTable1Depth:2.333333ft.ElementFlowsTo:Outlet1Outlet2SSDTableHydraulicTableStageAreaVolumeOutletjft)faa)(ac-It)StructNotUsedNotUsedNotUsedNotUsed0.0000.1770.0000.0000.0000.0000.0000.0000.0830.1770.0060.0050.0000.0000.0000.0000.1670.1770.0120.0060.0000.0000.0000.0000.2500.1770.0180.0080.0000.0000.0000.0000.3330.1770.0240.0090.0000.0000.0000.0000.4170.1770.0290.0100.0000.0000.0000.0000.5000.1770.0350.0110.0000.0000.0000.0000.5830.1770.0470.0120.0000.0000.0000.0000.6670.1770.0580.0130.0000.0000.0000.0000.7500.1770.0700.0140.0000.0000.0000.0000.8330.1770.0810.0140.0000.0000.0000.0000.9170.1770.0920.0150.0000.0000.0000.0001.0000.1770.1020.0160.0000.0000.0000.0001.0830.1770.1130.0160.0000.0000.0000.0001.1670.1770.1230.0240.0000.0000.0000.0001.2500.1770.1330.0280.0000.0000.0000.0001.3330.1770.1420.0320.0000.0000.0000.0001.4170.1770.1520.0380.0000.0000.0000.0001.5000.1770.1600.0430.0000.0000.0000.0001.5830.1770.1680.0460.0000.0000.0000.0001.6670.1770.1750.0500.0000.0000.0000.0001.7500.1770.1820.0530.0000.0000.0000.0001.8330.1770.1880.0560.0000.0000.0000.000 FlowFrequencyReturnReturnPeriod2year5year10year25year50year100yearPeriodsforFlowfcfs)0.0315140.0519560.0674740.089160.1067480.125513Predeveloped.Poc#1FlowFrequencyReturnReturnPeriod2year5year10year25year50year100yearPeriodsforFlow(cfs)0.0220120.0350850.0459250.0624310.0769840.093658Mitigated.Poc#1ProtectionDurationPeaksforPredevelopedandMitigated.POC#1PredevelopedMitigated0.0390.0140.0450.0250.0650.0570.0220.0130.0180.0150.0270.0160.0410.0170.0330.0300.0300.0160.0310.0191.9170.1770.1940.0580.0000.0000.0000.0002.0000.1770.2000.0610.0000.0000.0000.0002.0830.1770.2060.0630.0000.0000.0000.0002.1670.1770.2120.0660.0000.0000.0000.0002.2500.1770.2170.0680.0000.0000.0000.000ANALYSISRESULTSStreamProtectionDurationPredevelopedLanduseTotalsforPOC#1TotalPerviousArea:0.8067TotalImperviousArea:0MitigatedLanduseTotalsforPOC#1TotalPerviousArea:0.423TotalImperviousArea:0.3837StreamAnnualYear1949195019511952195319541955195619571958 19590.0260.01519600.0500.05019610.0250.02419620.0170.01219630.0250.01619640.0310.01619650.0230.02819660.0200.01519670.0480.01919680.0280.01519690.0270.01419700.0230.01519710.0290.02319720.0490.04019730.0230.02519740.0260.02319750.0380.01619760.0270.01819770.0090.01319780.0220.02419790.0140.01219800.0710.04519810.0210.01519820.0490.04319830.0340.02019840.0210.01419850.0120.01519860.0530.03219870.0480.04419880.0210.01419890.0130.01419900.1350.05719910.0610.05019920.0250.02419930.0250.01419940.0100.01219950.0330.02319960.0770.05219970.0610.05119980.0220.01419990.0840.04320000.0230.02420010.0060.01220020.0330.03620030.0450.01520040.0520.06020050.0340.02220060.0350.02620070.1000.07220080.1060.06420090.0480.033StreamProtectionDurationRankedAnnualPeaksforPredevelopedandMitigated.POC#1RankPredevelopedMitigated0.13500.07251 23456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657580.10610.09980.08410.07700.07050.06480.06080.06080.05270.05200.05030.04950.04900.04840.04790.04780.04500.04490.04090.03860.03750.03540.03420.03360.03330.03280.03270.03090.03050.03010.02870.02800.02700.02670.02650.0263002590.02540.02510.02460.02450.02350.02340.02300.02270.02240.02170.02170.02120.02080.02060.02040.01830.01710.01400.01300.01240.06390.05970.05780.05710.05690.05090.05000.04970.04450.04410.04320.04260.03960.03630.03320.03200.03040.02810.02550.02530.02510.02410.02380.02380.02370.02320.02290.02270.02220.02020.01930.01890.01850.01730.01620.01620.01620.01580.01580.01530.01520.01510.01500.01500.01490.01460.01450.01430.01420.01410.01410.01400.01400.01380.01310.01300.0125 590.01000.0123600.00920.0122610.00610.0121StreamProtectionDurationpoc#1TheFacilityPASSEDTheFacilityPASSED.Flowfcfs)PredevMitPercentagePass/Fail0.01581846318521100Pass0.0167160951053065Pass0.017614316963867Pass0.018512694889870Pass0.019411178822873Pass0.02049894755976Pass0.02138819696278Pass0.02227848645382Pass0.02317007595785Pass0.02406288536285Pass0.02495679493786Pass0.02595168451987Pass0.02684699410587Pass0.02774278377588Pass0.02863910353690Pass0.02953527320090Pass0.03053183290991Pass0.03142864271694Pass0.03232592253097Pass0.033223532374100Pass0.034121382222103Pass0.035119532085106Pass0.036017961952108Pass0.036916691790107Pass0.037815141630107Pass0.038713431488110Pass0.039712231346110Pass0.040611231232109Pass0.041510421124107Pass0.0424970970100Pass0.043391086494Pass0.044283877592Pass0.045276668689Pass0.046170459284Pass0.047063353484Pass0.047957047883Pass0.048848843288Pass0.049842539192Pass0.050737634391Pass0.051634128884Pass0.052530724078Pass0.053427119772Pass0.054423515867Pass0.055319613267Pass0.056217111366Pass 0.05711459263Pass0.05801256955Pass0.05901076157Pass0.0599955254Pass0.0608844452Pass0.0617714056Pass0.0626613659Pass0.0636553258Pass0.0645452146Pass0.0654401537Pass0.06633700Pass0.06723500Pass0.06812900Pass0.06912500Pass0.07002200Pass0.07091700Pass0.07181500Pass0.07271100Pass0.0737900Pass0.0746800Pass0.0755800Pass0.0764800Pass0.0773700Pass0.0783700Pass0.0792700Pass0.0801700Pass0.0810700Pass0.0819700Pass0.0829700Pass0.0838600Pass0.0847500Pass0.0856500Pass0.0865500Pass0.0874400Pass0.0884400Pass0.0893400Pass0.0902400Pass0.0911400Pass0.0920400Pass0.0930400Pass0.0939400Pass0.0948400Pass0.0957400Pass0.0966300Pass0.0976300Pass0.0985300Pass0.0994300Pass0.1003200Pass0.1012200Pass0.1022200Pass0.1031200Pass0.1040200Pass0.1049200Pass0.1058200Pass0.1067100Pass WaterQualityBMPFlowandVolumeforPOC#1On-linefacilityvolume:0acre-feetOn-linefacilitytargetflow:0cfs.Adjustedfor15mm:0cfs.Off-linefacilitytargetflow:0cfs.Adjustedfor15mm:0cfs.WetlandsFluctuationforPOC1Volumefacft)AverageAnnualMonthPredevelMitigatedPercentPass/FailJan9.543116.7185175.2FailFeb6.698511.6179173.4FailMar5.14649.4991184.6FailApr2.55335.2945207.4FailMay0.53512.5154470.1FailJun0.27052.2136818.4FailJul0.01750.86544950.5FailAug0.01091.544714133.7FailSep0.03602.52987023.9FailOct0.56896.95261222.0FailNov4.931315.9034322.5FailDec8.367317.1804205.3FailDayPredevelMitigatedPercentPass/FailJani0.31160.5732183.9Fail20.31900.5629176.5Fail30.28010.5187185.2Fail40.33810.5276156.0Fail50.35190.5346151.9Fail60.36810.5599152.1Fail70.33540.5902176.0Fail80.32740.6121187.0Fail90.26770.5780215.9Fail100.23690.5260222.0Fail110.26260.5147191.6Fail120.27820.5054181.7Fail130.35660.5406151.6Fail140.37170.5659152.3Fail150.32110.5590174.1Fail160.32390.5438167.9Fail170.31140.5338171.4Fail180.36240.5461150.7Fail190.34690.5204150.0Fail200.30820.5197162.6Fail210.26880.5268196.0Fail220.29140.5587191.7Fail230.35200.5997170.4Fail240.31960.5799181.4Fail250.26020.5182199.1Fail260.26140.4941189.0Fail270.25680.4885190.2Fail280.27420.4892178.4Fail290.31520.4905155.6Fail300.29990.4888163.0Fail 310.30380.5001164.6FailFebi0.26340.4827183.2Fail20.22310.4400197.2Fail30.22140.4252192.1Fail40.17810.3978223.4Fail50.19840.3806191.8Fail60.22900.3836167.5Fail70.29800.4093137.3Fail80.31150.4566146.6Fail90.23890.4224176.8Fail100.18740.3733199.2Fail110.21660.3760173.6Fail120.22960.4001174.2Fail130.1968038$6197.4Fail140.22260.4126185.4Fail150.25320.43981737Fail160.26350.4380166.2Fail170.24570.4325176.0Fail180.31520.4509143.1Fail190.28980.4491154.9Fail200.24090.4039167.7Fail210.21590.3864179.0Fail220.20250.3739184.6Fail230.22700.38071677Fail240.21990.39261785Fail250.192303798191.5Fail260.21760.3523164.6Fail270.22170.3228172.7Fail280.26310.3852146.4Fail290.18420.3673199.3FailMarl0.17740.3396191.5Fail20.21120.3449163.3Fail30.22780.3639159.7Fail40.24440.3734152.8Fail50.1962032831673Fail60.16550.2958178.7Fail70.14610.3015206.4Fail80.18730.3504187.1Fail90.19880.3615181.8Fail100.19460.3652187.7Fail110.23150.3853166.4Fail120.20530.3669178.8Fail130.17790.3418192.2Fail140.18530.3495188.7Fail150.16440.3277199.3Fail160.17260.3065177.6Fail170.16410.2905177.1Fail180.16000.2632164.5Fail190.13150.2497189.9Fail200.107202197205.0Fail210.13350.2402179.9Fail220.16250.2845175.1Fail230.15920.3112195.5Fail240.15280.3179208.1Fail250.13000.2770213.1Fail260.12160.2413198.4Fail270.10720.2204205.6Fail 280.11810.2406203.7Fail290.12210.2433199.2Fail300.10680.2308216.1Fail310.09800.2188223.2FailApri0.08280.2028244.9Fail20.08690.1844212.2Fail30.13280.1983149.3Fail40.16270.2342144.0Fail50.13220.2153162.8Fail60.09810.1876191.1Fail70.09680.2016208.3Fail80.11340.2155190.1Fail90.09600.1963204.4Fail100.08390.2041243.2Fail110.08130.2013247.7Fail120.09040.2086230.6Fail130.08420.1928228.8Fail14007170.1724240.4Fail150.0964O1$1O187.7Fail160.11100.1956176.2Fail170.06860.1592231.9Fail180.08820.1724195.4Fail190.11430.1816158.9Fail200.07150.1518212.3Fail210.05980.1338223.8Fail220.09510.1634171.9Fail230.07380.1666225.7Fail240.05350.1227229.3Fail250.03710.0955257.2Fail260.03710.12903479Fail270.03660.1427389.9Fail280.04230.1232291.0Fail290.05690.1429251.2Fail300.05290.1350255.0FailMayl0.04340.1338308.2Fail20.03010.1180392.2Fail30.02860.0851297.8Fail40.03390.0963283.7Fail50.032600961294.8Fail60.02520.0816324.2Fail70.01530.0758497.2Fail80.01290.0615478.2Fail90.01380.0605439.6Fail10OO1950.0908466.8Fail110.01200.0625519.1Fail120.01910.0675352,8Fail130.01750.0806460.1Fail140.01510.0793524.9Fail150.01430.0788552.9Fail160.00930.0619666.2Fail170.01040.0649623.2Fail180.01700.0785461.2Fail190.01830.0822448.1Fail200.01120.0660587.9Fail210.01110.0526472.9Fail220.00960.0557578.3Fail230.00700.06981001.8Fail 240.00470.06191322.1Fail250.00310.06582124.5Fail260.00270.08303115.7Fail270.00470.07251541.0Fail280.00910.0805883.8Fail290.01770.0972548.3Fail300.01290.1197927.6Fail310.01190.1069896.9FailJuzil0.02010.0996494.9Fail20.02140.1021477.8Fail30.01920.1207629.3Fail40.01080.1046969.5Fail50.01150.0910789.1Fail60.02440.0986404.7Fail70.01880.0878466.5FailB0.02030.1004494.7Fail90.02280.1145501.3Fail100.01330.1078808.0Fail110.01020.1002984.0Fail120.00690.06891001.0Fail130.00360.04181149.0Fail140.00290.03591233.2Fail150.00440.0430977.0Fail160.00600.0563942.2Fail170.00640.0540237.5Fail180.00370.04151122.7Fail190.00240.04141741.8Fail200.00490.0446902.2Fail210.00390.04631187.8Fail22000350.05751653.3Fail230.00600.09341567.9Fail240.00440.09962249.2Fail250.00230.06802973.2Fail260.0013OO4463368.8Fail270.00100.04344132.2Fail280.00110.05484963.6Fail290.00090.04484811.1Fail300.00300.04771607.3Faillull0.00230.04742030.2Fail20.00150.04603112.0Fail30.00080.03253895.8Fail40.0007OO33$4865.0Fail50.00050.03396628.4Fail60.00040.01975348.5Fail70.00070.0433592O9Fail80.00070.04326053.0Fail90.00070.03805685.6Fail100.00050.02986366.9Fail110.00060.03716325.7Fail120.00070.03775093.3Fail130.00060.03395413.1Fail140.00050.03125696.1Fail150.00070.04406270.0Fail160.00060.04307782.3Fail170.00030.02207477.3Fail180.00020.021410245.6Fail190.00020.02029865.2Fail 200.00010.011510046.5Fail210.00010.018815415.8Fail220.00010.016523533.1Fail230.00000.010424859.7Fail240.00010.008814810.3Fail250.00020.027813581.3Fail260.00030.027310828.5Fail270.00020.020511535.4Fail280.00010.00788856.7Fail290.00010.00346275.6Fail300.00010.006910942.0Fail310.00010.018914680.0FailAugi0.00020.023011590.2Fail20.00050.03597743.6Fail30.00030.026810078.1Fail40.00020.021213846.0Fail50.00010.027821755.3Fail60.00010.041330378.9Fail70.00010.034234203.3Fail80.00010.035633589.4Fail90.00010.027143698.2Fail100.00000.019055561.2Fail110.00000.017184184.8Fail120.00000.0158173399.9Fail130.00010.025627846.8Fail14OOOO20.050921983.8Fail150.00020.059338127.4Fail160.00020.054334585.7Fail170.00010.054341928.4Fail180.00010.060361958.1Fail190.00010.058375661.2Fail200.00010.048895492.6Fail210.00010.068760772.8Fail220.00050.078016068.6Fail230.00060.099515849.8Fail240.00080.091911625.5Fail250.00110.08888092.9Fail260.00190.08384317.3Fail270.00110.0782‘7208.5Fail280.00070.073710241.7Fail290.00070.06439320.4Fail300.00060.062410676.1Fail310.00030.058816905.6FailSepi0.00020.065928677.1Fail20.00010.061546392.1Fail30.00010.070747922.7Fail40.00010.052460913.8Fail50.00010.059646674.2Fail60.00010.043956950.3Fail70.00010.044636682.2Fail80.00020.057335379.8Fail90.00010.066545215.5Fail100.00020.076144009.1Fail110.00030.045115047.8Fail120.00020.033519131.3Fail130.00030.065124675.0Fail140.00020.067231467.4Fail 150.00020.057335605.2Fail160.00070.113016991.6Fail170.00080.131915564.3Fail180.00070.123016984.4Fail190.00090.100011708.3Fail200.00060.097517492.7Fail210.00260.09073478.4Fail220.01130.1110983.6Fail230.00650.11641782.2Fail240.00330.12803843.3Fail250.00190.13697022.5Fail260.00110.117710445.3Fail270.00090.126514191.0Fail280.00070.098714296.8Fail290.00110.113010316.1Fail300.00080.106212741.9FailOcti0.00060.1048167307Fail20.00050.118823740.4Fail30.00110.150714141.7Fail40.00190.14297568.9Fail50.04310.1735402.3Fail60.03810.1901499.5Fail70.02330.1978848.4Fail80.01860.21571159.1Fail90.02140.22441048.7Fail100.01260.23361856.3Fail110.00690.21163080.2Fail120.00650.20673194.7Fail130.00390.16354183.5Fail140.00280.15585579.2Fail150.00170.14428431.2Fail160.00350.15834570.8Fail170.00710.19902820.0Fail180.00950.22162333.2Fail190.03690.2859775.5Fail200.06720.3494520.0Fail210.03870.3154814.5Fail220.02450.29871221.5Fail230.01490.28071889.2Fail240.01270.26822117.2Fail250.01420.26861896.0Fail260.01850.27871505.8Fail270.01840.32281752.4Fail280.03730.3313889.4Fail290.04890.3106634.7Fail300.03310.3233975.5Fail310.03370.3264969.3FailNovl0.04060.3412839.4Fail20.05600.3699660.8Fail30.06270.4282683.5Fail40.05390.4246787.9Fail50.08460.4620546.3Fail60.10170.4774469.4Fail70.07230.4165576.3Fail80.07990.4431554.8Fail90.10080.4812477.2Fail100.13500.4982369.1Fail 110.15630.5401345.5Fail120.14290.5694398.5Fail130.16300.5728351.3Fail140.13890.5491395.3Fail150.12560.5585444.7Fail160.13230.5540418.7Fail170.15250.5475358.9Fail180.20830.5596268.6Fail190.26140.5969228.3Fail200.24750.6051244.5Fail210.20820.5716274.6Fail220.21340.5768270.2Fail230.34770.6680192.1Fail240.36610.6925189.2Fail250.31530.6843217.1Fail260.26420.6657252.0Fail270.20360.5990294.2Fail280.21330.5650264.9Fail290.25000.5595223.7Fail300.22770.5696250.1FailDeci0.24060.5884244.5Fail20.33890.6380188.2Fail30.32570.6303193.5Fail40.26120.6073232.5Fail50.25980.6034232.3Fail60.22220.5662254.8Fail70.21050.5227248.4Fail80.21910.5065231.2Fail90.25370.5309209.3Fail10O267O0.5420203.0Fail110.28380.5801204.4Fail120.28380.5830205.4Fail130.29490.5894199.9Fail140.37500.6264167.0Fail150.32710.5991183.2Fail160.27790.5689204.7Fail170.23780.5619236.3Fail180.20770.5390259.6Fail190.25790.5448211.3Fail200.26920.5812215.9Fail210.24140.5532229.2Fail220.24600.5136208.7Fail230.23640.4889206.8Fail240.21940.4602209.7Fail250.28650.4832168.7Fail260.35020.4952141.4Fail270.26750.4732176.9Fail280.24770.4873196.7Fail290.35550.5801163.2Fail300.27570.5672205.7Fail310.25890.5524213.4FailLIDReport LIDTechniqueUsedforTotalVolumnVolumnInfiltrationCumulativePercentWaterQualityPercentCommentTreatment?NeedsThroughVolumnVolumnVolumnWaterQualityTreatmentFacility(ac-if)InfiltrationInfiltratedTreatedfac-ft)(ac-ft)Credit$SDTable1POCN106.48N0.00TotalVolumeInfiltrated106.480.000.000.000.000%NoTreat.CreditCompliancewithLIDStandard8DurationAnalysisResult=PassedPerindandImpindChangesNochangeshavebeenmade.Thisprogramandaccompanyingdocumentationareprovided‘as-is’withoutwarrantyofanykind.TheentireriskregardingtheperformanceandresultsofthisprogramisassumedbyEndUser.ClearCreekSolutionsInc.andthegovernmentallicenseeorsublicenseesdisclaimallwarranties,eitherexpressedorimplied,includingbutnotlimitedtoimpliedwarrantiesofprogramandaccompanyingdocumentation.InnoeventshallClearCreekSolutionsInc.beliableforanydamageswhatsoever(includingwithoutlimitationtodamagesforlossofbusinessprofits,lossofbusinessinformation,businessinterruption,andthelike)arisingoutoftheuseof,orinabilitytousethisprogramevenifClearCreekSolutionsInc.ortheirauthorizedrepresentativeshavebeenadvisedofthepossibilityofsuchdamages.SoftwareCopyright©by:ClearCreekSolutions,Inc.2005-2016;AllRightsReserved. _________STAGESTORMAGEVOLUMEHeightorinctentaiSmglekiaementa1Incremental”LcrèntaiSystemChamberTotalChamberStone4’&StChamberElevation(inches)(cubicfeet)(cubicfeet)(cubicfeet)(cubicfeet)(cubicfeet)(feet)28o.do’oO256.9726.91‘2z.O2.33270.000.00256.97256.979470.942.25260.000.00256.97256.979213.972.17250.00•0.00256.97256.978957.002.08240.000.00256.97256.978700.042.00230.000.00256.97256.978443.071.92220.0616.82250.24267.068186.101.83210.1544.25239.27283.527919.051.75200.2776.04226.55302.597635.53‘L67190.54155.81194.64350.457332.941.58180.70201.36176.42377.786982.491.50170.82235.82162.64398.466604.711.42160.92264.42151.20415.626206.251.33151.01290.29140.85431.145790.631.25141.09313.04131.75444.795359.491.17131.15330.12124.92455.044914.701.08121.21347.47117.98465.454459.661.00111.27364.62111.12475.743994.210.92—101.32378.83105.44484.263518.470.8391.36390.39100.81491.203034.210.7581.40401.8396.23498.062543.010.6771.43410.3092.85503.152044.950.5860.000.00256.97256.97‘541.800.5050.00•0.00256.97256.971284.830.4240.000.00256.97256.971027.870.3330.000.00256.97256.97770.900.2520.000.00256.97256.97513.930.1710.000.00256.97256.97256.970.08 APPENDIXCGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 0LStotmwaterSolutions- . - , ‘-.----_iNSPECTIONANDMAiNTENANCEGUIDEWashingtonStateDepartmentofEcology(800)579-8819oldcastlestorrnwater.comAugust31,2015Version2stormcapture.com PerkFilterInspectionandMaintenanceGuideforWashingtonStateDepartmentofEcologyPerkFiIterTMMediaFiltrationSystemDescription/BasicFunctionThePerkFilterisastormwaterfiltrationdeviceusedtoreducepollutantloadinginrunofffromurbandevelopments.Impervioussurfacesandotherurbanandsuburbanlandscapesgenerateavarietyofcontaminantsthatcanenterstormwater,pollutingdownstreamreceivingwaters.ThePerkFiltercapturesandretainssediment,oils,metalsandothertargetconstituentsclosetothesourceandreducesthetotalpollutantdischargeload.ThePerkFiltercartridgeismanufacturedfromdurablepolymericcomponentswithapolymer-coatedsteelsupportscreenandstainlesssteelhardware.Itsbaseconstructionallowsusewithawidevarietyofmediachosentoaddresssite-specificpollutantsofconcern.PerkFiltersmaybeinstalledasaretrofittosuitableexistingcurbinlet,dropinlet,orcombinationcatchbasins,asanintegralpartofacoatedsteel-orconcrete-housedstormwaterinletsystemforcommercial,residential,andindustrialdevetopments,orascentralizedmodulartreatmentsysteminstalledeitheronlineoroff-line.Pre-filtrationSystemsconstructedwithacatchbasininletareequippedwithaFloGard+Plus®CatchBasinInsertforpre-filtration.Thisinsertcapturesgrosspollutantssuchastrash,debris,hydrocarbons,andlargesedimentparticles.GravitySeparationSomePerkFiltersystemshaveaninletbaywhereintheinitialstormwaterflowsarereceived.Thisisseparatedfromthemaintreatmentchamberbyabafflewallwithweirassembly.Mediumsizesedimentparticlesareretainedintheinletbay.Adraindownassemblytoeliminatestandingwaterfromtheinletbayareabetweenstormeventsisincludedinstandardconfigurations.MediaFiltrationOncethestormwaterentersthetreatmentchamber,itwillpassthroughthefiltrationcartridgescontainingtheproject-specifiedfiltermediaasthewaterlevelrisesinthechamber.Veryfinepollutantparticulateswillberetainedinthefiltercartridgesasthewaterflowsthroughthemediatoaninteriorslottedpipe,droppingthetreatedstormwaterintoanoutletchamberbelowafalsefloor.PeakFlowBypassPerkFiltersystemsaredesignedwithapeakflowbypasstoensurethesystemwillnotbackupandcauseupstreamfloodingduringextraordinarystormevents.Thebypassweirisanintegralpartofthebafflewallassemblyintheinletbayandallowspeakflowstormwaterdirectlytotheoutletchamber.©2015OldcastlePrecast,Inc.28/31/2015V2 PerkFilterInspectionandMaintenanceGdeforWashhgtonStateDepartmentofEcologyMaintenanceOverviewforPerkFllterSystemsStateandLocalregulationsrequirethatstormwatermanagementsystemsbemaintainedandservicedonarecurringbasis.ThepurposeofmaintainingacleanandobstructionfreePerkFiltersystemistoensurethesystemperformstheintendedfunctionoftheprimarydesign.Trashanddebris,floatables,grosspollutantsandsedimentcanbuildupinanystormwatersystem.Thiscancausethesystemtofunctionimproperlybyimpedingflowinandoutofthesystemandreducingtheoperatingefficiencyofthemediafilters.Downstreamandupstream,areascouldruntheriskoffloodinganddeleteriousenvironmentalimpact.RecommendedFrequencyofServiceItisrecommendedthatPerkFiltersystemsbeservicedonaregularlyoccurringbasis.Ultimatelythefrequencydependsontheamountofrunoff,pollutantloading,andinterferencefromtrash,debrisandgrosspollutantsaswellaspropermaintenanceofupstreampretreatmentdevices.However,itisrecommendedthateachinstallationbeinspectedinaccordancewiththefollowingguidelines:Level1InspectionService—Sixmonthsafterunitisplacedintoservice,orsixmonthsalteraLevel2orLevel3inspection.Level2InspectionService—FourmonthsafteraLevel1inspectionor10monthsafteraLevel3service.Level3Service—AsdeterminedbyfindingsfromLevel2inspectionservice,reportsindicatingamediafilterchangeorsystemrepairsarerequiredtomaintaintheoperatingefficiencyofthesystem.ServiceProceduresInletBay1.Theinletmanholecover(s)andorgrate(s)shallberemovedandplacedtooneside.2.ForsystemswithaFloGard+Plus®CatchBasinInsert,theinsertwillbecleanedinaccordancewiththegeneralspecificationsformaintenanceofthosedevices.Aftercleaningthefittershaltberemovedandsetaside.3.Anydebriswillberemovedfromtheinletbay(s)anddisposedofinaccordancewithlocalregulations.4.Checkandcleantheareabehindandundertheinletweir/bypassassembly.Removeassemblyasnecessarytoconductinspection.5.Checkdraindownassemblyandcleanifnecessary.6.Re-installcatchbasininsertfilter.7.Re-installgrateormanholeaccesscover©2015OldcastlePrecast,Inc.38/31/2015V2 PerkFilterInspectionandMaintenanceGuideforWashingtonStateDepartmentofEcologyCartridgeBay1.Removeandplacetoonesidethemanholeaccesscoversabovethecartridgebay.2.ALevel1inspectionserviceshallconsistofavisualinspectionfromthesurfacetevel.Observeandnotetheconditionofthecartridgebayandthecartridges,measuresedimentlevel,ifany,andnoteonmaintenancerecord.Physicalentryisnotrequiredunlessthedepthpreventstheentirecartridgebayareafrombeingobserved.3.ALevel2inspectionserviceshallconsistofaphysical,confined-spaceentryintothecartridgebay.Thefiltercartridgesandfiltermediashallbeinspectedforconditionandfiltermedialife,thesedimentlevel,ifany,measured,andanytrashordebrisremovedanddisposedofinaccordancewithlocalregulations.Allinformationandrecommendationsshallbenotedonthemaintenancerecord.4.ALevel3serviceshallconsistofaphysical,confined-spaceentryintothecartridgebay.Thefiltercartridgesshallberemovedandreplacedwithre-chargedexchangefiltercartridges.Asanoption,thefiltermediamayberemovedofon-site,thecartridgescleaned,andreplacementmediabeinstalledintothecartridges.Allspentfiltermediashallbedisposedofinaccordancewithlocalregulations.5.Uponcompletionofinspection/service,re-installthemanholeaccesscover(s).6.Themanholecover(s)and/orgrate(s)shallbereplaced.inspectionIMaintenanceRequirementsListedbelowaresomerecommendationsforequipmentandtrainingforpersonneltoinspectandmaintainaPerkFiltersystem.Personnel:OSHAConfinedSpaceEntrylrainingisaprerequisiteforentranceintoasystem.Equipment:RecordTaking(pen,paper,voicerecorder)ProperClothing(appropriatefootwear,gloves,hardhat,safetyglasses,etc.)FlashlightTapeMeasureMeasuringStickPryBarTrafficControl(Flagging,barricades,signage,cones,etc.)FirstaidmaterialsDebrisandContaminantcollectorsDebrisandContaminantcontainersVacuumTruckDispasaloiGrossPollutants,Hydrocarbons,Sediment,andFilterMediaThecollectedgrosspollutants,hydrocarbons,sediment,andfiltermediashallbedisposedofinaccordancewithlocal,stateand/orfederalagencyrequirements.©2015OldcastlePrecast,Inc.48/31/2015_V2 cx:cE:ci,Eci,czI.01•U)0Eci,U)a)0EC-)C-,E02U)=00I0U)U,=cc I.0Theisolator®Row1.1INTRODUCTIONTheIsolatorRowistypicallydesignedtocapturetheAnmportantcomponentofanyStormwaterPollution‘firstflush”andofferstheversatflitytobesizedonavo’PreventionPlanisinspectionandmaintenance.Theumebasisorflowratebasis.AnupstreammanholenotStormTechsolatorRowisapatentedtechniquetoonlyprovidesaccesstotheIsolatorRowbuttypicallyinexpensivelyenhanceTotalSuspendedSolids(ISS)includesahighflowweirsuchthatstormwaterttowratesremovalandprovideeasyaccessforinspectionandorvolumesthatexceedthecapacityoftheIsolatorRowmaintenance.overtoptheoverflowweiranddischargethroughamanifoldtotheotherchambers.TheIsolatorRowmayalsobepartofatreatmenttrain.Bytreatingstormwaterpriortoentryintothechambersystem,theservicelifecanbeextendedandpollutantssuchashydrocarbonscanbecaptured.Pre-treatmentbestmanagementpracticescanbeassimpleasdeepsumpcatchbasins,oil-waterseparatorsorcanbeinnovativestormwatertreatmentdevices.Thedesignofthetreatmenttrainandselectionofpretreatmentdevicesbythedesignengineerisoftendrivenbyregulatoryrequirements.Whetherpretreatmentisusedornot,theIsolatorRowisrecommendedbyStormTechasaneffectivemeanstominimizemaintenancerequirementsandmaintenancecosts.Note:SeetheStormTechDesignManualfordetailedinformationondesigninginletsforaStormTechsystem,includingtheIsolatorRow.1.2THEiSOLATORROWTheIsolatorRowisarowofStormTechchambers,eitherSC-310,SC-310-3,SC-740,DC-780,MC-3500orMC-4500models,thatissurroundedwithfilterfabricandcon-nectedtoacloselylocatedmanholeforeasyaccess.Thefabric-wrappedchambersprovideforsettlingandfiltrationofsedimentasstormwaterrisesintheIsolatorRowandultimatelypassesthroughthefilterfabric.Theopenbottomchambersandperforatedsidewalls(SC-310,SC-310-3andSC-740models)allowstormwatertoflowbothverticallyandhorizontallyoutofthechambers.MANHOLESedimentsarecapturedintheIsolatorRowprotectingOVERFLOWthestorageareasoftheadjacentstoneandchambersWEIRfromsedimentaccumulation.TwodifferentfabricsareusedfortheIsolatorRow.AwovengeotextilefabricisplacedbetweenthestoneandtheIsolatorRowchambers.Thetoughgeotextileprovidesamediaforstormwaterfiltrationandprovidesadurablesurfaceformaintenanceoperations.Itisalsodesignedtopreventscouroftheunderlyingstoneandremainintactduringhighpressurejetting.Anon-wovenfabricisplacedoverthechamberstoprovideafiltermediaforflowspassingthroughtheperforationsinthesidewallofthechamber.Thenon-wovenfabricisnotrequiredovertheDC-f8O,MC-3500orMC-4500modelsasthesechambersdonothaveperforatedsidewalls.LookingdowntheIsolatorRowfromthemanholeopening,wovengeotextileisshownbetweenthechamberandstonebase.StormTechIsolatorRowwithOverflowSpiliway(nottoscale)OPTIONALAccEss2CallStormiechat888.892.2694orvisitourwebsiteatwwwstormtechcomfortechnicalandproductinformation. 2OisolatorRowInspectionlMaintenanceStormTech2.1INSPECTIONThefrequencyofnspectionandMaintenancevariesbylocation.Aroutineinspectionscheduleneedstobeestablishedforeachindividuallocationbaseduponsitespecificvariables.Thetypeoflanduse(i.e.industrial,commercial,residential),anticipatedpollutantload,per-centimperviousness,climate,etc.allplayacriticalroleindeterminingtheactualfrequencyofinspectionandmaintenancepractices.Ataminimum,StormTechrecommendsannualinspections.Initially,theIsolatorRowshouldbeinspectedevery6monthsforthefirstyearofoperation.Forsubsequentyears,theinspectionshouldbeadjustedbaseduponpreviousobservationofsedimentdeposition.TheIsolatorRowincorporatesacombinationofstandardmanhole(s)andstrategicallylocatedinspectionports(asneeded).Theinspectionportsallowforeasyaccesstothesystemfromthesurface,eliminatingtheneedtoperformaconfinedspaceentryforinspectionpurposes.Ifuponvisualinspectionitisfoundthatsedimenthasaccumulated,astadiarodshouldbeinsertedtodeter-minethedepthofsediment.Whentheaveragedepthofsedimentexceeds3inchesthroughoutthelengthoftheIsolatorRow,clean-outshouldbeperformed.2.2MAINTENANCETheIsolatorRowwasdesignedtoreducethecostofperiodicmaintenance.Byisolating’sedimentstojustonerow,costsaredramaticallyreducedbyeliminatingtheneedtocleanouteachrowoftheentirestoragebed.Ifinspectionindicatesthepotentialneedformain-tenance,accessisprovidedviaamanhole(s)locatedontheend(s)oftherowforcleanout.Ifentryintothemanholeisrequired,pleasefollowlocalandOSHArulesforaconfinedspaceentries.MaintenanceisaccomplishedwiththeJetVacprocess.TheJetVacprocessutilizesahighpressurewaternozzletopropelitselfdowntheIsolatorRowwhilescouringandsuspendingsediments.Asthenozzleisretrieved,thecapturedpollutantsareflushedbackintotheman-holeforvacuuming.Mostsewerandpipemaintenancecompanieshavevacuum/JetVaccombinationvehicles.SelectionofanappropriateJetVacnozzlewillimprovemaintenanceefficiency.Fixednozzlesdesignedforculvertsorlargediameterpipecleaningarepreferable.Rearfacingjetswithaneffectivespreadofatleast45”arebest.MostJetVacreelshave400feetofhoseallow-ingmaintenanceofanIsolatorRowupto50chamberslong.TheJetVacprocessshallonlybeperformedonStormTechIsolatorRowsthathaveAASHTOclass1wovengeotextlle(asspecifiedbyStormTech)overtheirangularbasestone.NOTE:NON-WOVENFABRICISONLYREQUIREDOVERTHEINLETPIPECONNECTIONINTOTHEENDCAPFORDC-780,MC-3500ANDMC-4500CHAMBERMODELSAND5NOTREQUIREDOVERTHEENTIREISOLATORROW.ExamplesofculvertcleaningnozzlesappropriateforIsolatorRowmaintenance.(ThesearenotStormlechproducts.)StormTechIsolatorRow(nottoscale)OPTIONALINSPECTIONPORTLOCATIONPERENGINEERSDRAWING(4[1OOmm]0PVCCOVERENTIREROWWiTHADS6S1TNONWOVENGEOTEXTILE(OREQUAL)SC-745.8)2.4m)W1DESTRIPSC.31S&SO-31S3.5(15m)WIDESTRIP-STORMTECHENDCAP2LAYERSOFADS315WOVENGEOTEXTILE(OREQUAL)BETWEENSTONEEASEANDCHAMBERSMC-4SSS-10.3)3.1m)W(DESTR)P)AOS3ISWTM)MC-USSS-8.252.5m)WIDESTRIP)ADS3ISWTM)SC.74S5DC7RS-5(1.5m)WIDESTRIP)ADS3I5WTK)SC31E&SC-31D4.41.2m)WIDESTRIP(ADS3155,0K)CallStormTechat$8&892.2694orvisitourwebsiteatwww.stormtechcomfortechnicalandproductinformation.3 3.OIsolatorRowStepByStepMaintenanceProceduresStep1)InspectsolatorRowforsedimentStormiechIsolatorRow(nottoscale)A)Inspectionports(ifpresent)I.Removelidfromfloorboxframeii.Removecapfrominspectionriseriii.Usingaflashlightandstadiarod,measuredepthofsedimentandrecordresultsonmaintenancelog.iv.Ifsedimentisat,orabove,3inchdepthproceedtoStep2.Ifnotproceedtostep3.B)AllIsolatorRowsi.RemovecoverfrommanholeatupstreamendofIsolatorRowii.Usingaflashlight,inspectdownIsolatorRowthroughoutletpipe1.Mirrorsonpolesorcamerasmaybeusedtoavoidaconfinedspaceentry2.FollowOSHAregulationsforconfinedspaceentryifenteringmanholeiii.Ifsedimentisatorabovethelowerrowofsidewallholes(approximately3inches)proceedtoStep2.IfnotproceedtoStep3.Step2)CleanoutIsolatorRowusingtheJetVacprocessA)Afixedculvertcleaningnozzlewithrearfacingnozzlespreadof45inchesormoreispreferableB)ApplymultiplepassesofJetVacuntilbackflushwateriscleanC)VacuummanholesumpasrequiredStep3)Replaceallcaps,lidsandcovers,recordobservationsandactionsStep4)Inspect&cleancatchbasinsandmanholesupstreamoftheStormTechsystemSampleMaintenanceLog.StadlaBadReadingsIFixIFSethmenlDatetoa:rieia:;IIeptObservatianslActionsInspectorhottom(1)[pediment(2)Jt[none4NewstatkflxedisClframetgre[I2OIO35.0.5ft.Muckyfeel,eItisvisiHeinmanholeinrvjm6StormTechDetention‘Retention•WaterQualityA&vzsionofLLttLL70InwoodRoad,Suite3RockyHillConnecticut06067860.529.8188888.892.2694fax866.328.8401www.stormtech.comADS“TermsandConditionsofSale”areavailableontheADSwebsite,www.ads-pipe.comAdvancedDrainageSystems,theADSlogo,andthegreenstripeareregisteredtrademarksofAdvancedDrainageSystems.StormtechandthelsoIatorRowareregisteredtrademarksofStormiech,Inc.GreenBuildingCouncilMemberlogoisaregisteredtrademarkoftheU.S.GreenBuildingCouncil.©2013AdvancedDrainageSystems,Inc.509080902/13 APPENDIXBGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 Site Improvement Bond Quantity Worksheet S15 Webdate:02122/2013 L King County Department of Permitting &Environmental Review35030SEDouglasStreet,Suite 210Snoqualmie,Washington 98065-9266 For alternate formats,call 206-296-6600.206-296-660C TrY Relay 711 Project Name:Union Avenue Date:09/23/15Location:3956 NE 24th Street,Renton ,WA Project No.:BI 5002755 Activity No.: ______________________________ Note:All prices include labor,equipment,materials,overhead andClearinggreaterthanorequalto5,000 board feet of timber?profit.Prices are from RS Means data adjusted for the Seattle area or from local sources if not included in the RS Means database. ___________ yes Xno If yes, Forest Practice Permit Number: ____________________ (RCW 76.09) Page 1 of 9 Unit prices updated:02/12/02 Version:11/26/2008AppendixD-BondQuantitiesSpreadsheet-updated.xls Report Date:11/2/2015 Site Improvement Bond Quantity Worksheet S15 Webdate:02/22/2013 Unit #f —---Reference #Price Unit Quantity Applications CostEROSIONISEDIMENTCONTROLNumber Backfill &compaction-embankment ESC-1 $5.62 CYCheckdams,4t minus rock ESC2 SWDM 5.4.63 $6751 Eachçmshedsurfacing11/4”minus ESC-3 WSDQT 9-03.9(3)$85A5 CYDitchingESC-4 i____8.08 CYExcavation-bulk ESC-5 $I 50 CYFence,silt ESC6 SWDM 54.31 $1.38 LF 690 1 952Fence,Temporary (NGPE)ESC-7 $I .38 LFHydroseedingESC8SWDM5A2.4 $059 SY 1655 1 976JuteMesh .ESC-9 SWDM 5A.2.2 $1 .45 SYMulch,by hand,straw,3”deep ESC-1O SWDM 5.42.1 $2.01 SYMulch,by machine,straw,2”deep ESC-11 SWDM 542.1 $0.53 SYPiping,temporary,CPP,6”ESC-12 $1OJO LFPiping,temporary,CPP,8’ESC-13 $16.10 LFPiping,temporary,CPP,12”ESC-14 $20.70 LFPlasticcovering,6mm thick,sandbagged ESC-15 SWDM 5.4.Z3 $230 SYRipRap,machine placed;slopes ESC-16 WSDOT 9-131(2)$39.08 CYRockConstructionEntrance,50’x15’xf’ESC-fZ SWDM 5.4.4.1 $I 464.34 Each 1 1 1464RockConstructionEntrance,100’x15’xJ’ESC-f8 SWDM 5AA.1 $2,928.68 EachSedimentpondriserassemblyESC-19 SWDM 5.4.5.2 $1 949.38 EachSedimenttrap,5’high berm ESC-20 SWDM 5.4.5.1 $17.91 LFSed.trap,5’high,riprapped spitiway berm section ESC-21 SWDM 5.4.5.1 $68.54 LFSeeding,by hand ESC-22 SWDM 5.42.4 $0.51 SYSodding,1”deep,level ground ESC-23 SWDM 5.42.5 $6.03 SYSodding,1”deep,sloped ground ESC-24 SWDM 5.4.2.5 $745 SYTESCSupervisorESC-25 $74.75 HRWatertruck,dust control ESC26 SWDM 5.4.7 $97.75 HRWRITE-IN-ITEMS ****(see page 9) Each ESCSUBTOTAL:$3,392.9930%CONTINGENCY &MOBILIZATION:$I 017.90 ESC TOTAL:$4,410.89 COLUMN:APage2of9 Unit prices updated:02/12/02 Version:11/26/2008AppendixD-BondQuantitiesSpreadsheet-updated.xls Report Date:11/2/2015 Web date:12/02/2008SitetmprovementBondQuantityWorksheet -. .-.--..—‘V •Existing Future Public Private Quantity Completed Right-of-Way Right of Way Improvements (Bond Reduction)* &Drainage Facilities Quant. Unit Price =::Quant.I Cost Quant.I Cost Quant.I Cost Complete Cost GENERALITEMS No Backfill &Compaction-embankment G1-1 $5.62 CY Backfill &Compaction-trench GI-2 $8.53 CY Clear/Remove Brush,by hand GI-3 $0.36 SY Clearing/Grubbing/Tree Removal GI-4 $8876.16 Acre Excavation -bulk GI-5 $I .50 CY Excavation -Trench GI-6 $4.06 CY Fencing,cedar,6’high Gl-7 $18.55 LF Fencing,chain link,vinyl coated,6’higl Gl-8 $13.44 LF Fencing,chain link,gate,vinyl coated,Gl-9 $1,271.81 Each Fencing,splitrail,3high GI-lO $12.12 LF Fill &compact -common barrow GI-il $22.57 CY Fill &compact -gravel base Gl-12 $25.48 CV Fill &compact -screened topsoil Gl-13 $37.85 CY Gabion,12”deep,stone filled mesh Gl-14 $54.31 SY Gabion,18”deep,stone filled mesh Gl-15 $74.85 SY Gabion,36”deep,stone filled mesh •Gl-16 $132.48 SY Grading,fine,by hand Gl-17 $2.02 SY ______Grading,fine,with grader Gl-18 $0.95 SY Monuments,3’long Gl-19 $135.13 Each Sensitive Areas Sign Gl-20 $2.88 Each Sodding,1’deep,sloped ground Gl-21 $7.46 SY Surveying.line &grade Gl-22 $788.26 Day Surveying,lot location/lines Gl-23 $1,556.64 Acre Traffic control crew (2 flaggers )Gl-24 $85.1 8 HR 8 681 44Trail,4”chipped wood Gl-25 $7.59 SY Trail,4 crushed cinder Gl-26 $8.33 SY Trail,4”top course Gl-27 $8.19 SY Wall,retaining,concrete Gl-28 $44.16 SF Wall,rockery Gl-29 $9.49 SF Page 3 of 9 SUBTOTAL Unit prices updated:02/12/02 Version:11/26/08 Report Date:11/2/2015 681.44 *KCC 27A authorizes only one bond reduction. Appendix D-BondQuantitiesSpreadsheet-updated.xls S ito I m p rove m e nt Bo n U Q u antity Works h eet Web date:12/02/2008 Existing Future Public Private Bond Reduction* Right-of-way Right of Way Improvements —&Drainage Facilities Quant.I Unit Price Unit Quant.I Cost Quant.I Cost Quant.I Cost Complete Cost ROADIMPROVEMENT No AC Grinding,4 wide machine <l000sy RI-I $28.00 SY AC Grinding,4’wide machine 1000-200 Rl-2 $15.00 SY AC Grinding,4’wide machine >2000sy RI-3 $7.00 SY _______________ AC Removal/Disposal/Repair RI-4 $67.50 SY 31 2,092.50Barricade,type 1 RI-5 $30.03 LF Barricade,type Ill (Permanent )Rl-6 $45.05 LF Curb &Gullet,rolled RI-7 $17.00 LF Curb &Gutter,vertical Rl-8 $12.50 LF Curb and Gutter,demolition and dispos 1RI-9 $18.00 LF Curb,extruded asphalt Ri-b $5.50 LF Curb,extruded concrete RI-Il $7.00 LF Sawcut,asphalt,3’depth Rl-12 $1.85 LF 85 157.25Sawcut,concrete,per I depth Rl-13 $1 .69 LF Sealant,asphalt F:L.j.4 $1.25 LF Shoulder,AC,(see AC road unit price Rl-15 $-SY Shoulder,gravel,4”thick Rl-16 $15.00 SY Sidewalk,4”thick ILj_z $35.00 Sidewalk,4fl thick,demolition and dispo Rl-18 $29.50 SY Sidewalk,5”thick Rl-19 $38.50 SY 29 1 ,1 I 6.50Sidewalk,5”thick,demolition and dispo Rl-20 $37.50 SY 29 1,087.50Sign,handicap Rl-21 $85.28 Each Striping,perstall Rl-22 $5.82 Each Striping,thermoplastic,(for crosswalk )Rl-23 $2.38 SF Striping,4”reflectorized line RL24 $0.25 LF Page 4 of 9 SUBTOTAL 4,453.75 Unit prices updated:02/12/02*KCC 27A authorizes only one bond reduction.Version:11/26/08AppendixD-BondQuantitiesSpreadsheet-updated.xls Report Date:11/2/2015 Site Improvement Bond Quantity Worksheet Webdate:12/02/2008 Existing Future Public Private Bond Reduction* Right-of-way Right of Way Improvements &Drainage Facilities Quant.Unit Price Unft Quant.I Cost Quant.I Cost Quant.I Cost Complete Cost ROAD SURFACING (4”Rock =2.5base &I .5’top course)For ‘93 KCRS f 6.5 Rock 5”base&15”top course)For KCRS ‘93,(additional 2.5 base)ad RS-1 $3.60 SY AC Overlay,I .5”AC RS-2 $I I .25 SY AC Overlay,2”AC RS-3 $15.00 SY AC Road,2,4”rock,First 2500 SY RS-4 $21 .00 SY AC Road,2’,4”rock,Qty.over 2500SY RS-5 $I9.00 SY AC Road,3”,4”rock,First 2500 SY RS-6 $23.30 SY 31 722.30ACRoad,3”,4”rock,Qty.over 2500 S RS-7 $21 .00 SY AC Road,5”,First 2500 SY RS-8 $27.60 SY AC Road,5”,Qty.Over 2500 SY RS-9 $25.00 SY AC Road,6’,First 2500 SY S-1 $33.10 SY AC Road,6”,Qty.Over 2500 SY S-1 $30.00 SY Asphalt Treated Base,4”thick S-1 $20.00 SY Gravel Road,4”rock,First 2500 SY S-1 $I 5.00 SY Gravel Road,4”rock,Qty.over 2500 S S-1 $8.50 SY PCC Road,5”,no base,over 2500 SY RS-1 $27.00 SY PCC Road,6”,no base,over 2500 SY RS-1 $25.50 SY Thickened Edge S-1 $8.60 LF Page 5 of 9 SUBTOTAL 722.30 Unit prices updated:02/12/02*KCC 27A authorizes only one bond reduction.Version:11/26/08AppendixD-BondQuantitiesSpreadsheet-updated.xls Report Date:1 1/2/2015 S ite I m p rovem ent Eon d Q u a ntity Works heet Web date:12/02/2008 Existing Future Public Private Bond Reduction* Right-of-way Right of Way Improvements &Drainage Facilities Quant. L===iE!:t Price =:i Quant.I Cost Quant.I Cost Quant.Cost Complete Cost DRAINAGE (CPP =Corrugated PlasticPipeN12 or_Equivalent)For Culvert prices,Averageof4coverwas assumed.Assume perforated PVC is same priceas solid pipe.Access Road,RID D -I $21 .00 SY Bollards -fixed D -2 $240.74 Each Bollards -removable D -3 $452.34 Each*(CBs include frame and lid) CB Type I D -4 $I ,257.64 Each CB Type IL D -5 $1,433.59 Each CB Type II,48”diameter D -6 $2,033.57 Each for additional depth over 4’D -7 $436.52 FT CB Type II,54”diameter D -8 $2192.54 Each for additional depth over 4’D -9 $486.53 FT CB Type II,60’diameter D -1 0 $2351 .52 Each for additional depth over 4 D -1 1 $536.54 FT CB Type II,72”diameter D-12 $3,212.64 Each for additional depth over 4’D -I3 $692.21 FT Through-curb lnlet Framework (Add)D -14 $366.09 Each Cleanout,PVC,4’D -1 5 $I 30.55 Each Cteanout,PVC,6”D -16 $174.90 Each Cleanout,PVC,&_:iJ 224.19 fi.%!2. ———Culvert,PVC,4”D -18 $8.64 LF Culvert,PVC,6 Li $12.60 Culvert,PVC,8’D -20 $I 3.33 LF Culvert,PVC,I 2”1_21 .77 LF Culvert,CMP,8”Q:P 17.25 Culvert,CMP,12”Q:26.45 Culvert,CMP,15’_z_-__ 32.73 Culvert,CMP,18”$ —Culvert,CMP,24’z__g_$53.33 Culvert,CMP,30”L?i $71 .45 —Culvert,CMP,36 z.a8 s 112.11 LF Culvert,CMP,48’$140.83 Culvert,CMP,60”D -30 $235.45 LF Culvert,CMP,72”D-31 $302.58 LF Page 6 of 9 SUBTOTAL Unit prices updated:02/12/02*KCC 27A authorizes only one bond reduction. Version:11/26/08AppendixD-BondQuantitiesSpreadsheet-updated.xls Report Date:I 1/2/2015 S ite I m provem ent Bo n U Q ua ntity Works heet Web date:72/02/2008 Existing Future Public Private Bond Reduction* Right-of-way Right of Way ImprovementsDRAINAGECONTINUED&Drainage Facilities Quant.jt Price =::Quant.Cost Q!gt.Cost Quant.Cost Complete CostCulvert,Concrete,8’D -32 $21 .02 LF Culvert,Concrete,12’D -33 $30.05 LF Culvert,Concrete,15”D -34 $37.34 LF Culvert,Concrete,18”D -35 $44.51 LF Culvert,Concrete,24”D -36 $61 .07 LFCulvert,Concrete,30’D -37 $104.18 LF Culvert,Concrete,36”D-38 $I 37.63 LF Culvert,Concrete,42”D -39 $158.42 LF Culvert,Concrete,48”D -40 $175.94 LFCulvert,CPP,6”D -41 $10.70 LF Culvert,CPP,8”D -42 $16.10 LF Culvert,CPP,12”D -43 $20.70 LF Culvert,CPP,1 5”D -44 $23.00 LFCulvert,CPP,18’D -45 $27.60 LF CuIver CPP,24”D-46 $36.80 LF Culvert,CPP,30”D -47 $48.30 LF Culvert,CPP,36”D -48 $55.20 LF Ditching $8.08 CY Flow Dispersal Trench (1 436 base+)D-50 $25.99 LF French Drain (3 depth)D -51 $22.60 LF Geotextile,laid in trench,polypropylene D-52 $2.40 SY Infiltration pond testing D-53 $74.75 HR Mid-tank Access Riser,48”dia,6’deep D-54 $f 605.40 Each Pond Overflow SpilIway D-55 $14.01 SY Restrictor/Oil Separator,I 2”D-56 $1,045.19 Each Restrictor/ON Separator,I 5 D-57 $I 095.56 Each Restñctor/Oil Separator,18’D -58 $1,146.16 Each Riprap,placed D -59 $39.08 CY Tank End Reducer (36”diameter)0-60 $I 000.50 Each TrashRack,72”D-61 $211.97 Each Trash Rack,15”D-62 $237.27 Each Trash Rack,1 8”$268.89 Trash Rack,21”D-64 $306.84 Each Pagefof9 SUBTOTAL Unit prices updated:02/12/02*KCC 27A authorizes only one bond reduction. Version:11/26/08AppendixD-BondQuantitiesSpreadsheet-updated.xls Report Date:I 1/2/20 15 Web date:12102/2008SiteImprovementBondQuantityWorksheet — Existing Future Public Private Bond Reduction* Right-of-way Right of Way Improvements &Drainage Facilities Quant. L=== UnitPrice Unit Quant.Price Quant.I Cost Quant.I Cost Complete Cost PARKING LOT SURFACING 2’AC,2”top course rock&4”borrow 2’AC.I .5’to course &2.5’base cou 4”select borrow 1 .5”top course rock &2.5”base course No. PL -I PL 2 PL-3 PL -4 $21.00 $28.00 $4.55 $11.41 sy sy sy sy [ -L L WRITE-IN-ITEMS (Such as detention/water quality vaults.)N StormTech Detention Facility WI-I $5.50 CF Sewer Main 8”-PVC WI-2 $36.00 LF Sidewalk Closed Sign WI-3 $85.00 Each 2 170 Oldcastle PerkFilter WI-4 $10,000.00 Each WI -5 WI -6 WI -7 WI -8 WI 9 WI -10 -.I — UTILITY POLES &STRFFT LIHTIN Utility pole relocation costs must be accompanied branchise Utility’s Cost Statement Utility Pole(s)Relocation I UP-I I Lump Sum I I I I I I 1 IStreetLightPolesw/Luminaires I UP-2 I I Each I SUBTOTAL 170.00 Page $of9 SUBTOTAL (SUM ALL PAGES): 30%CONTINGENCY &MOBILIZATION: GRANDTOTAL: COLUMN: 6,027.49 1,808.25 7,835.74 B C D E Unit prices updated:02/12/02 Version:11/26/08 Report Date:I 1/2/2015 *KCC 27A authorizes only one bond reduction. Appendix D-BondQuantitiesSpreadsheet-updated.xls Web date:12/02/2008 Original bond computations prepared by: Site Improvement Bond Quantity Worksheet Name: PE Registration Number: Firm Name: Address: Robert Kehrti,PE 48089 Green Lake Engineering,LLC 6045 4th Ave.NE,Seattle WA 98115 Date: TeL#: Project No: 11/20/15 206-898-4269 B1 5002755 Stabilization/Erosion Sediment Control (ESC) Existing Right-of-Way Improvements Future Public Right of Way &Drainage Facilities Private Improvements Calculated Quantity Completed Total Right-of Way and/or Site Restoration Bond*/** (First $7,500 of bond*shall be cash. Performance Bond*Amount (A+B+C+D)TOTAL Reduced Performance Bond*Total Maintenance/Defect Bond*Total (A+B) $4,410.9 $7,835.7 $ $ !12,246.6 (T)$12,246.6 Minimum bond*amount is $200G BOND*AMOUNT REQUIRED AT RECORDING OR TEMPORARY OCCUPANCY (T-E)$12,246.6 Use larger of Tx30%or (T-E NAME OF PERSON PREPARING BOND*REDUCTION:Robert Kehrli,PE Date:11/20/15 *NOTE:The word ‘bond”as used in this document means a financial guarantee acceptable to King County. **NOTE:KCC 27A authorizes right of way and site restoration bonds to be combined when both are required. The restoration requirement shall include the total cost for all TESC as a minimum,not a maximum.In addition,corrective work,both on-and off-site needs to be included. Quantities shall reflect worse case scenarios not just minimum requirements.For example,if a salmonid stream may be damaged,some estimated costs for restoration needs to be reflected in this amount.The 30%contingency and mobilization costs are computed in this quantity. ***NOTE:Per KCC 27A,total bond amounts remaining after reduction shall not be less than 30%of the original amount (I)or as revised by major design changes. 1 I REQUIRED BOND*AMOUNTS ARE SUBJECT TO REVIEW AND MODIFICATION BY DDES Page 9 of 9 Appendix D-BondQuantitiesSpreadsheet-updatbk out the DDES Web site at www.kinqcounty.gov/permits Unit prices updated:02/12/02 Version:11/26/08 Report Date:11/2/2015 (A) (B) (C) (D) ROAD IMPROVEMENTS &DRAINAGE FACILITIES FINANCIAL GUARANTEE REQUIREMENTS PERFORMANCE BOND*PUBLIC ROAD &DRAINAGE AMOUNT MAINTENANCE/DEFECT BOND* (E)$ T x 0.30 $3,674.0 OR (B+C)x 0.25=$1,958.9 APPENDIXEGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 RECORDING REQUESTEDBYANDWHENRECORDEDMAILTO:CITYCLERK’SOFFICECITYOfRENTON1055SOUTHGRADYWAYRENTON,WA98057DECLARATIONOFCOVENANTFORMAINTENANCEANDINSPECTIONOFFLOWCONTROLBMPSTuscanyConstruction,LLCGrantor:_______ _ ______ _______ ______ _ ______ ______Grantee:CityofRenton.Aportionofthesoutheast1/4ofthenortheast1/4ofsection4,LegalDescription:township23north,range5east,WM.,situateinKingCounty,WashingtonAdditionalLegal(s)on:V042305-9325AssessorsTaxParcelID#:_____________________________________________________________________INCONSIDERATIONoftheapprovedCityofRenton(checkoneofthefollowing)residentialbuildingpermit,Licommercialbuildingpermit,Uclearingandgradingpermit,Lisubdivisionpermit,orrJshortsubdivisionpermitforApplicationFileNo.LUA/SWP____________________relatingtotherealproperty(“Property”)describedabove,theGrantor(s),theowner(s)infeeofthatProperty,hereby covenants(covenant)withCityorRenton,apoliticalsubdivisionofthestateofWashington,thathe/she(they)willobserve,consentto,andabidebytheconditionsandobligationssetforthanddescribedinParagraphs1through8belowwithregardtotheProperty.Grantor(s)herebygrants(grant),covenants(covenant),andagrees(agree)asfollows:1.Grantor(s)orhis/her(their)successorsininterestandassigns(“Owners”)shallretain,uphold,andprotectthestormwatermanagementdevices,features,pathways,limits,andrestrictions,knownasflowcontrolbestmanagementpractices(“BMP&’),shownontheapprovedFlowControlBMPSitePlanforthePropertyattachedheretoandincorporatedhereinasExhibitA.2.TheOwnersshallattheirowncost,operate,maintain,andkeepingoodrepair,theProperty’sBMPsasdescribedintheapprovedDesignandMaintenanceDetailsforeachBMPattachedheretoandincorporatedhereinasExhibitB.3.CityorRentonshallprovideatleast30dayswrittennoticetotheOwnersthatentryonthePropertyisplannedfortheinspectionoftheBMPs.Afterthe30days,theOwnersshallallowtheCityofRentontoenterforthesolepurposeofinspectingtheBMPs.InlieuofinspectionbytheCity,theOwnersmayelecttoengagealicensedcivilengineerregisteredinthestateofWashingtonwhohasexpertiseindrainagetoinspecttheBMPsandprovideawrittenreportdescribingtheircondition.Iftheengineeroptionischosen,theOwnersshallprovidewrittennoticetotheCityofRentonwithinfifteendaysofreceivingtheCity’snoticeofinspection.Within30daysofgivingthisnotice,theOwners,ortheengineeronbehalfoftheOwners,shallprovidetheengineer’sreporttotheCityofRenton.Ifthereportisnotprovidedinatimelymannerasspecifiedabove,theCityofRentonmayinspecttheBMPswithoutfurthernotice.4.IftheCitydeterminesfromitsinspection,orfromanengineer’sreportprovidedinaccordancewithParagraph3,thatmaintenance,repair,restoration,and/ormitigationworkisrequiredfortheBMPs,TheCityshallnotifytheOwnersofthespecificmaintenance,repair,restoration,and/ormitigationwork(Work)requiredunderRMC4-6-030.TheCityshallalsosetareasonabledeadlineforcompletingtheWorkorprovidinganengineer’sreportthatverifiescompletionoftheWork.Afterthedeadlinehas passed,theOwnersshallallowtheCityaccesstore-inspecttheBMPsunlessanengineer’sreporthasbeenprovidedverifyingcompletionoftheWork.IftheworkisnotcompletedproperlywithinthetimeframesetbytheCity,theCitymayinitiateanenforcementaction.FailuretoproperlymaintaintheBMPsisaviolationofRMC4-6-030andmaysubjecttheOwnerstoenforcementundertheRMC1-3,includingfinesandpenalties.5.Apartfromperformingroutinelandscapemaintenance,theOwnersareherebyrequiredtoobtainwrittenapprovalfromtheCityorRentonbeforeperforminganyalterationsormodificationstotheBMPs.6.AnynoticeorapprovalrequiredtobegivenbyonepartytotheotherundertheprovisionsofthisDeclarationofCovenantshallbeeffectiveuponpersonaldeliverytotheotherparty,oraflerthree(3)daysfromthedatethatthenoticeorapprovalismailedwithdeliveryconfirmationtothecurrentaddressonrecordwitheachParty.Thepartiesshallnotifyeachotherofanychangetotheiraddresses.7.ThisDeclarationofCovenantisintendedtopromotetheefficientandeffectivemanagementofsurfacewaterdrainageontheProperty,anditshallinuretothebenefitofallthecitizensoftheCityofRentonanditssuccessorsandassigns.ThisDeclarationofCovenantshallnmwiththelandandbebindinguponGrantor(s),andGrantor’s(s’)successorsininterestandassigns.8.ThisDeclarationofCovenantmaybeterminatedbyexecutionofawrittenagreementbytheOwnersandtheCityofRentonthatisrecordedbyKingCountyinitsrealpropertyrecords. [NWITNESSWHEREOF,thisDeclarationofCovenantfortheMaintenanceandInspectionofFlowControlBMPsisexecutedthis_ _ _ _ _dayof,20GRANTOR,ownerofthePropertyGRANTOR,ownerofthePropertySTATEOFWASHiNGTON)COUNTYOFKING)ss.Onthisdaypersonallyappearedbeforeme:_________________________________________,tomeknowntobetheindividual(s)describedinandwhoexecutedthewithinandforegoinginstrumentandacknowledgedthattheysignedthesameastheirfreeandvoluntaryactanddeed,fortheusesandpurposesthereinstated.Givenundermyhandandofficialsealthis__ _ _ _dayof,20PrintednameNotaryPublicinandfortheStateofWashington,residingatMyappointmentexpires APPENDIXFGREENLAKEENGINEERING,LLC60454thAvenueNE,Seattle,WA98115206-525-5332 $,-OriginalMessage-Subject:AssessmentofSubsurfaceInfiltrationFeasibility-3956NE24thStreet,RentonFrom:MarcMcGinnis<marcm©geotechnwcom>Date:Fri,October30,20151:25pmTo:BobWenzl<bob©belmonthomeswa.com>,‘cIiffcsitedme.com”<cliff©sitedme.com>BobandCliff,IvisitedthesitetodaytoobservetheexcavationoftestpitsintheproposedlocationsoftheinfiltrationtrenchesonthewestsideofLot1andthestormsystemlocatedintheNE24thStreetright-of-waytothesoutheastofLot2.Thetestpitsexposedsiltysandfillandloose,gravetty,siltysandextendingtoadepthof4to5feetinbothareas.Belowthesesoils,weobservedverydense,gray,gravelly,siltysandextendingtothemaximumexploreddepthof12to13feet.Thisverydensesoilhasbeenglaciallycompressedandislocallyreferredtoasglacialtill.Nogroundwaterwasencounteredinthetestpits,butaseasonalperchedwatertableoftenformsontopofglacialtillsoilsfollowingextendedwetweather.Theglacialtillsoilsareessentiallyimpervious,andtheupperfillandsiltysandhasaverylowpermeability.Additionally,shallowperchedwaterislikelypresentatleastseasonally.Unfortunately,theseconditionsarenotfeasibleforsubsurfaceinfiltrationofrunofffromtheproject.MarcR.McGinnis,P.E.GeotechConsultants,Inc.13256N.E.20thStreet,No.16Bellevue,WA98005(425)747-5618(Office)/(425)260-1116(Mobile)Disclaimer:Anyelectronicform,facsimileorhardcopyoftheoriginaldocument(email,text,table,and/orfigure),ifprovided,andanyattachmentsareonlyacopyoftheoriginaldocument.TheoriginaldocumentisstoredbyGeotechConsultants,Inc.andwillserveastheofficialdocumentofrecord.Copyright2014GeotechConsultants,Inc.Allrightsreserved.