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HomeMy WebLinkAboutMarriot Residence Inn - Storm Drainage Adjustment Request.pdfCIVILENGINEERING,LANDPLANNING.SURVEYINGMay20,2016BrianneBannwarthCityofRenton1055SouthGradyWayRenton,WA98055M252016crrvoRE:RequestforSurfaceWaterDesignManualRequirementStandardsAdjustmentMarriottResidenceInnRenton,WashingtonCityofRentonFileNo.U15008434OurJobNo.15564DearBrianne:OnbehalfofourclientWesternInternational,wearerequestingadrainageadjustmentfromthe2009CityofRentonAmendmentstotheKingCountySurfaceWaterDesignManual,Section6.1.2,EnhancedBasicWaterQualityMenu.TheEnhancedBasicWaterQualityMenuhasseveraloptionswhicharenotfeasibleforuseonthisprojectduetogradeconstraintsofthesite.TherearethreeEnhancedBasicWaterQualityoptions,oneofwhichisalargesandfilter,thesecondoptionisastormwaterwetland,andthirdoptionisatwo-facilitytreatmenttrain.Thelargesandfilteroptionrequirestoomuchdropandthereisnotadequateroomonthesitetofacilitatealargesandfilter.Thesiteisonthefringeofanaquiferrechargeareaandtherefore,theopenstormwaterwetlandwouldnotbeallowedasanoption.Thethirdoptionofatwo-facilitytreatmenttrainalsorequiresadropthatisnotfeasibleonthissite.Amodularwetlandisproposedtobelocatedafterdetentionandwithadropofonly6-inchesthroughthesystem,wouldbeafeasibleoptionforthissite.PerCityofRentonstandardsforgrantingadjustments,twocriteriamustbeproven.Thefirstcriteriaaretoproduceacompensatingoracomparableresultthatisinthepublicinterest.Thesecondcriteriaaretomeettheobjectivesofsafety,function,appearances,environmentalprotection,andmaintainabilitybasedonsoundengineeringjudgment.Eachcriteriaisaddressedbelow.CriteriaNo.1CriteriaNo.2In2015,theDepartmentofEcologyProgramgrantedBioCleanEnvironmental,theproprietarymanufacturerofmodularwetlandsystems,aGeneralUseLevelDesignation(GULD)forEnhanced,Basic,andPhosphorusWaterQualityTreatmentMenusforthemodularwetlandsystemthatisproposedforusewiththisproject.ModularwetlandsystemshavebecomeamuchusedoptionforprovidingEnhancedWaterQualityfordevelopmentsinWashingtonStateaswellasinotherstatesthroughoutthecountry.Thesystemhasaproventrackrecordandisinthepublicinterestasitismorecosteffectiveandworkswellonsiteswithinadequateroomforothersystems.Themodularwetlandsystemmeetstheobjectivesofsafety,function,appearance,environmentalprotection,andmaintainabilitybasedonsoundengineeringjudgmentbecauseitissmallerinsizethananyoftheotheroptionsfromthe2009KingCountySurfaceWaterDesignManualasadoptedbytheCityofRenton.Itislocatedbelowgroundandthereforeisabletomitigateimpactstosafety,function,andaesthetics.Modularwetlandsystemsaremorecosteffectiveandeasertomaintainthanmostoftheotheroptionsdesignatedintheprioradoptedmanual.7821572NDAVENUESOUTHKENT,WA98032(425)251-6222(425)251-8782FAXBRANCHOFFICES•TUMWATER,WA•LONGBEACH,CA•ROSEVILLE,CA•SANDIEGO,CAwww.barghausen.com BrianneBannwarthCityofRenton-2-May20,2016AcopyoftheGeneralUseLevelDesignation(GULD)documentfromtheDepartmentofEcologygrantingmodularwetlandsystemsasacceptableforEnhanced,Basic,andPhosphorusWaterQualityregimensisenclosedwiththisrequest.Alsoattachedisthegradinganddrainageplanshowingthelayoutofthemodularwetlandsystemonthesite,andindicatingbestmanagementofthewaterqualityoptionusingthemodularwetlandsystem.BioCleanEnvironmentalprovidesthefirstyearofmaintenanceonthenewfacilitywhichwilldeterminearegularscheduleformaintenanceinthefuturebasedonpollutantloadingsoccurringfromagivensite.PleasereviewthisrequestforadjustmenttotheSurfaceWaterDesignManualrequirementsandfeelfreetocontactmeifyouhaveanyquestionsorcomments.Respectfully,‘rAliSadr,P.E.SeniorProjectManagerAS/Urn15564c.003.docenc:GeneralUseLevelDesignationforEnhanced,Basic,andPhosphorusWaterQualityRegimensGradingandDrainagePlancc:DanielK.BaIrnelli,BarghausenConsultingEngineers,Inc.JakeP.Jacobs,BarghausenConsultingEngineers,Inc. ECENEDMAY25crr(OFRENIONPLANNGDVONDecember2015GENERALUSELEVELDESIGNATIONFORBASIC,ENHANCED,ANDPHOSPHORUSTREATMENTFortheMWS-LinearModularWetlandEcology’sDecision:BasedonModularWetlandSystems,Inc.applicationsubmissions,includingtheTechnicalEvaluationReport,datedApril1,2014,Ecologyherebyissuesthefollowinguseleveldesignation:1.Generaluseleveldesignation(GULD)fortheMWS-LinearModularWetlandStormwaterTreatmentSystemforBasictreatment•Sizedatahydraulicloadingrateof1gallonperminute(gpm)persquarefoot(sqft)ofwetlandcellsurfacearea.Formoderatepollutantloadingrates(lowtomediumdensityresidentialbasins),sizethePrefiltersat3.0gpmlsqftofcartridgesurfacearea.Forhighloadingrates(commercialandindustrialbasins),sizethePrefiltersat2.1gpm!sqftofcartridgesurfacearea.2.Generaluseleveldesignation(GULD)fortheMW$-LinearModularWetlandStormwaterTreatmentSystemforPhosphorustreatment•Sizedatahydraulicloadingrateof1gallonperminute(gpm)persquarefoot(sqft)ofwetlandcellsurfacearea.Formoderatepollutantloadingrates(lowtomediumdensityresidentialbasins),sizethePrefiltersat3.0gpm!sqftofcartridgesurfacearea.Forhighloadingrates(commercialandindustrialbasins),sizethePrefiltersat2.1gpmlsqftofcartridgesurfacearea.3.Generaluseleveldesignation(GULD)fortheMWS-LinearModularWetlandStormwaterTreatmentSystemforEnhancedtreatment•Sizedatahydraulicloadingrateof1gallonperminute(gpm)persquarefoot(sqft)ofwetlandcellsurfacearea.Formoderatepollutantloadingrates(lowtomediumdensityresidentialbasins),sizethePreffitersat3.0gpmlsqftofcartridgesurfacearea.Forhighloadingrates(commercialandindustrialbasins),sizethePrefiltersat2.1gpm/sqftofcartridgesurfacearea.WASHINGTONSlUtOEPIATMENTOFECOLOGY 4.EcologyapprovestheMWS-LinearModularWetlandStormwaterTreatmentSystemunitsforBasic,Phosphorus,andEnhancedtreatmentatthehydraulicloadingratelistedabove.Designersshallcalculatethewaterqualitydesignflowratesusingthefollowingprocedures:•WesternWashington:Fortreatmentinstalledupstreamofdetentionorretention,thewaterqualitydesignflowrateisthepeak15-minuteflowrateascalculatedusingthelatestversionoftheWesternWashingtonHydrologyModelorotherEcology-approvedcontinuousrunoffmodel.•EasternWashington:Fortreatmentinstalledupstreamofdetentionorretention,thewaterqualitydesignflowrateisthepeak15-minuteflowrateascalculatedusingoneofthethreemethodsdescribedinChapter2.2.5oftheStormwaterManagementManualforEasternWashington(SWMMEW)orlocalmanual.•EntireState:Fortreatmentinstalleddownstreamofdetention,thewaterqualitydesignflowrateisthefull2-yearreleaserateofthedetentionfacility.5.TheseuseleveldesignationshavenoexpirationdatebutmayberevokedoramendedbyEcology,andaresubjecttotheconditionsspecifiedbelow.Eco1oy’sConditionsofUse:Applicantsshallcomplywiththefollowingconditions:1.Design,assemble,install,operate,andmaintaintheMW$—LinearModularWetlandStormwaterTreatmentSystemunits,inaccordancewithModularWetlandSystems,Inc.applicablemanualsanddocumentsandtheEcologyDecision.2.EachsiteplanmustundergoModularWetlandSystems,Inc.reviewandapprovalbeforesiteinstallation.ThisensuresthatsitegradingandslopeareappropriateforuseofaMW$—LinearModularWetlandStormwaterTreatmentSystemunit.3.MWS—LinearModularWetlandStormwaterTreatmentSystemmediashallconformtothespecificationssubmittedto,andapprovedby,Ecology.4.TheapplicanttestedtheMWS—LinearModularWetlandStormwaterTreatmentSystemwithanexternalbypassweir.Thisweirlimitedthedepthofwaterflowingthroughthemedia,andthereforetheactivetreatmentarea,tobelowtherootzoneoftheplants.ThisGULDappliestoMWS—LinearModularWetlandStormwaterTreatmentSystemswhetherplantsareincludedinthefinalproductornot.5.Maintenance:Therequiredmaintenanceintervalforstormwatertreatmentdevicesisoftendependentuponthedegreeofpollutantloadingfromaparticulardrainagebasin.Therefore,Ecologydoesnotendorseorrecommenda“onesizefitsall”maintenancecycleforaparticularmodel/sizeofmanufacturedfiltertreatmentdevice.•Typically,ModularWetlandSystems,Inc.designsMWS-LinearModularWetlandsystemsforatargetprefiltermedialifeof6to12months.•Indicationsoftheneedformaintenanceincludeeffluentflowdecreasingtobelowthedesignflowrateordecreaseintreatmentbelowrequiredlevels.•Owners/operatorsmustinspectMWS-LinearModularWetlandsystemsforaminimumoftwelvemonthsfromthestartofpost-constructionoperationtodeterminesite-specific maintenanceschedulesandrequirements.Youmustconductinspectionsmonthlyduringthewetseason,andeveryothermonthduringthedryseason.(AccordingtotheSWMMWW,thewetseasoninwesternWashingtonisOctober1toApril30.AccordingtoSWMMEW,thewetseasonineasternWashingtonisOctober1toJune30).Afterthefirstyearofoperation,owners/operatorsmustconductinspectionsbasedonthefindingsduringthefirstyearofinspections.•Conductinspectionsbyqualifiedpersonnel,followmanufacturer’sguidelines,andusemethodscapableofdeterminingeitheradecreaseintreatedeffluentflowrateandloradecreaseinpollutantremovalability.•Wheninspectionsareperformed,thefollowingfindingstypicallyserveasmaintenancetriggers:•Standingwaterremainsinthevaultbetweenrainevents,or•Bypassoccursduringstormssmallerthanthedesignstorm.•Ifexcessivefloatables(trashanddebris)arepresent(butnostandingwaterorexcessivesedimentation),performaminormaintenanceconsistingofgrosssolidsremoval,notprefiltermediareplacement.•Additionaldatacollectionwillbeusedtocreateacorrelationbetweenpretreatmentchambersedimentdepthandpre-filterclogging(seeIssuestobeAddressedbytheCompanysectionbelow)6.DischargesfromtheMWS-LinearModularWetlandStormwaterTreatmentSystemunitsshallnotcauseorcontributetowaterqualitystandardsviolationsinreceivingwaters.Applicant:ModularWetlandSystems,Inc.Applicant’sAddress:PU.Box869Oceanside,CA92054ApplicationDocuments:•OriginalApplicationforConditionalUseLevelDesignation,ModularWetlandSystem,LinearStormwaterFiltrationSystemModularWetlandSystems,Inc.,January2011•QualityAssuranceProjectPlan:ModularWetlandsystem—LinearTreatmentSystemperformanceMonitoringProject,draft,January2011.•RevisedApplicationforConditionalUseLevelDesignation,ModularWetlandSystem,Linear$tormwaterFiltrationSystemModularWetlandSystems,Inc.,May2011•Memorandum:ModularWetlandSystem-LinearGULDApplicationSupplementaryData,April2014•TechnicalEvaluationReport:ModularWetlandSystemStormwaterTreatmentSystemPerformanceMonitoring,April2014. Applicant’sUseLevelRequest:GeneraluseleveldesignationasaBasic,Enhanced,andPhosphorustreatmentdeviceinaccordancewithEcology’sGuidanceforEvaluatingEmergingStormwaterTreatmentTechnologiesTechnologyAssessmentProtocol—Ecology(TAPE)January2011Revision.Applicant’sPerformanceClaims:•TheMWS—LinearModularwetlandiscapableofremovingaminimumof80-percentofTSSfromstonnwaterwithinfluentconcentrationsbetween100and200mg/i.•TheMWS—LinearModularwetlandiscapableofremovingaminimumof50-percentofTotalPhosphorusfromstormwaterwithinfluentconcentrationsbetween0.1and0.5mg/i.•TheMWS—LinearModularwetlandiscapableofremovingaminimumof30-percentofdissolvedCopperfromstormwaterwithinfluentconcentrationsbetween0.005and0.020mg/l.•TheMWS—LinearModularwetlandiscapableofremovingaminimumof60-percentofdissolvedZincfromstormwaterwithinfluentconcentrationsbetween0.02and0.30mg/l.EcologyRecommendations:•ModularWetlandSystems,Inc.hasshownEcology,throughlaboratoryandfield-testing,thattheMWS-LinearModularWetlandStormwaterTreatmentSystemfiltersystemiscapableofattainingEcology’sBasic,Totalphosphorus,andEnhancedtreatmentgoals.FindingsofFact:LaboratoryTestingTheMW$-LinearModularwetlandhasthe:•Capabilitytoremove99percentoftotalsuspendedsolids(usingSil-Co-Sil106)111aquarter-scalemodelwithinfluentconcentrationsof270mg/L.•Capabilitytoremove91percentoftotalsuspendedsolids(usingSil-Co-Sil106)111laboratoryconditionswithinfluentconcentrationsof84.6mg/Lataflowrateof3.0gpmpersquarefootofmedia.•Capabilitytoremove93percentofdissolvedCopperinaquarter-scalemodelwithinfluentconcentrationsof0.757mg/L.•Capabilitytoremove79percentofdissolvedCopperinlaboratoryconditionswithinfluentconcentrationsof0.567mg/Lataflowrateof3.0gpmpersquarefootofmedia.•Capabilitytoremove80.5-percentofdissolvedZincinaquarter-scalemodelwithinfluentconcentrationsof0.95mg/Lataflowrateof3.0gpmpersquarefootofmedia.•Capabilitytoremove78-percentofdissolvedZincinlaboratoryconditionswithinfluentconcentrationsof0.75mg/Lataflowrateof3.0gpmpersquarefootofmedia. FieldTesting•ModularWetlandSystems,Inc.conductedmonitoringofanMWS-Linear(Model#MWS-L-4-13)fromApril2012throughMay2013,atatransportationmaintenancefacilityinPortland,Oregon.Themanufacturercollectedflow-weightedcompositesamplesofthesystem’sinfluentandeffluentduring28separatestormevents.Thesystemtreatedapproximately75percentoftherunofffrom53.5inchesofrainfallduringthemonitoringperiod.Theapplicantsizedthesystemat1gpmlsqft.(wetlandmedia)and3gpmlsqft.(prefilter).•InfluentTSSconcentrationsforqualifyingsampledstormeventsrangedfrom20to339mg/L.AverageTSSremovalforinfluentconcentrationsgreaterthan100mg/L(n=7)averaged85percent.Forinfluentconcentrationsintherangeof20-100mgIL(n=18),theupper95percentconfidenceintervalaboutthemeaneffluentconcentrationwas12.8mg/L.•Totalphosphorusremovalfor17eventswithinfluentTPconcentrationsintherangeof0.1to0.5mg/Laveraged65percent.Abootstrapestimateofthelower95percentconfidencelimit(LCL95)ofthemeantotalphosphorusreductionwas58percent.•Thelower95percentconfidencelimitofthemeanpercentremovalwas60.5percentfordissolvedzincforinfluentconcentrationsintherangeof0.02to0.3mg/L(n=11).Thelower95percentconfidencelimitofthemeanpercentremovalwas32.5percentfordissolvedcopperforinfluentconcentrationsintherangeof0.005to0.02mg/L(n=14)atflowratesupto28gpm(designflowrate41gpm).Laboratorytestdataaugmentedthedataset,showingdissolvedcopperremovalatthedesignflowrateof4lgpm(93percentreductionininfluentdissolvedcopperof0.757mg/L).IssuestobeaddressedbytheCompany:1.ModularWetlandSystems,Inc.shouldcollectmaintenanceandinspectiondataforthefirstyearonallinstallationsintheNorthwestinordertoassessstandardmaintenancerequirementsforvariouslandusesintheregion.ModularWetlandSystems,Inc.shouldusethesedatatoestablishrequiredmaintenancecycles.2.ModularWetlandSystems,Inc.shouldcollectpre-treatmentchambersedimentdepthdataforthefirstyearofoperationforallinstallationsintheNorthwest.ModularWetlandSystems,Inc.willusethesedatatocreateacorrelationbetweensedimentdepthandpre-filterclogging.TechnologyDescription:Downloadathttp://www.modularwetlands.com!ContactInformation:Applicant:GregKentModularWetlandSystems,Inc.P.O.Box869Oceanside,CA92054gkent(äD,biocleanenvironmental.net Applicantwebsite:http://www.modularwetlands.com!Ecologyweblink:http://www.ecy.wa.gov/programs/wg/stormwater/newtechlindex.htmlEcology:DouglasC.Howie,P.E.DepartmentofEcologyWaterQualityProgram(360)407-6444douglas.howie(ecy.wa.govRevisionHistoryDateRevisionJune2011Originaluse-level-designationdocumentSeptember2012ReviseddatesforTERandexpirationJanuary2013ModifiedDesignStormDescription,addedRevisionTable,addedmaintenancediscussion,modifiedformatinaccordancewithEcologystandardDecember2013UpdatednameofApplicantApril2014ApprovedGULDdesignationforBasic,Phosphorus,andEnhancedtreatmentDecember2015UpdatedGULDtodocumenttheacceptanceofMWS-LinearModularWetlandinstallationswithorwithouttheinclusionofplants. MaintenanceSummary9VEDMAY252OICTYCiNTONM0DULAR\)IETLI\NDSMaintenanceGuidelinesforModularWetlandSystem-LinearoRemoveSedimentfromSeparationChamber—averagemaintenanceintervalis12to24months.•(10minuteaverageservicetime).oReplaceCartridgeFilterMedia—averagemaintenanceinterval12to24months.•(10-15minutepercartridgeaverageservicetime).oTrimVegetation—averagemaintenanceintervalis6to12months.•(Servicetimevaries).SystemDiagramInflowPipe(optional)Accesstoscreeningdevice,separationchamberandcartridgefilterr’.70ufflow—JPipeiiJf\11)(A.IliI(IIJJt11Pre-TreatmentChamberBiofiltrationChamberDischargeChamberwww.modularwetlands.com MODULARWETLANDSMaintenanceProceduresSeparationChamber1.Performmaintenanceproceduresofscreeningdevicelistedabovebeforemaintainingtheseparationchamber.2.Withapressurewasherspraydownpollutantsaccumulatedonwallsandcartridgefilters.3.VacuumoutSeparationChamberandremoveallaccumulatedpollutants.Replacescreeningdevice,grateormanholecoverwhencompleted.CartridgeFilters1.Performmaintenanceproceduresonscreeningdeviceandseparationchamberbeforemaintainingcartridgefilters.2.Enterseparationchamber.3.Unscrewthetwoboltsholdingthelidoneachcartridgefilterandremovelid.4.Removeeachof4to8mediacagesholdingthemediainplace.5.Spraydownthecartridgefiltertoremoveanyaccumulatedpollutants.6.Vacuumoutoldmediaandaccumulatedpollutants.7.Reinstallmediacagesandfillwithnewmediafrommanufactureroroutsidesupplier.Manufacturerwillprovidespecificationofmediaandsourcestopurchase.8.Replacethelidandtightendownbolts.Replacescreeningdevice,grateormanholecoverwhencompleted.www.modularwetlands.com M0DULARWETLANDSMaintenanceNotes1.Followingmaintenanceand/orinspection,itisrecommendedthemaintenanceoperatorprepareamaintenance/inspectionrecord.Therecordshouldincludeanymaintenanceactivitiesperformed,amountanddescriptionofdebriscollected,andconditionofthesystemanditsvariousfiltermechanisms.2.Theownershouldkeepmaintenance/inspectionrecord(s)foraminimumoffiveyearsfromthedateofmaintenance.Theserecordsshouldbemadeavailabletothegoverningmunicipalityforinspectionuponrequestatanytime.3.Transportalldebris,trash,organicsandsedimentstoapprovedfacilityfordisposalinaccordancewithlocalandstaterequirements.4.Entryintochambersmayrequireconfinedspacetrainingbasedonstateandlocalregulations.5.NofertilizershallbeusedintheBiofiltrationChamber.6.Irrigationshouldbeprovidedasrecommendedbymanufacturerand/orlandscapearchitect.Amountofirrigationrequiredisdependentonplantspecies.Someplantsmayrequiteirrigation.www.modularwetlands.com MaintenanceProcedureIllustrationM0DULARWETLANDSSeparationChamberTheseparationchamberislocateddirectlybeneaththescreeningdevice.Itcanbequicklycleanedusingavacuumtruckorbyhand.Apressurewasherisusefultoassistinthecleaningprocess.www.modularwetlands.com CartridgeFiltersThecartridgefiltersarelocatedinthePre-Treatmentchamberconnectedtothewalladjacenttothebiofiltrationchamber.Thecartridgeshaveremovabletopstoaccesstheindividualmediafilters.Oncethecartridgeisopenmediacanbeeasilyremovedandreplacedbyhandoravacuumtruck.M0DULARWEILANDSwww.modularwetlands.com TrimVegetationVegetationshouldbemaintainedinthesamemannerassurroundingvegetationandtrimmedasneeded.Nofertilizershallbeusedontheplants.Irrigationpertherecommendationofthemanufacturerandorlandscapearchitect.Differenttypesofvegetationrequiresdifferentamountsofirrigation.MODULARWETLANDSwww.modulanwetlands.com MaintenanceReportModularWetlandSystem,Inc.P.760.433-7640F.760-433-3176E.Info@modularwetlands.comwww.modularwetlands.comMODULARWETLANDS BI4iCLEANENVIC0NMNTAL5tRVLC€S,It.LCInspectionReport_ _ _ModularWetlandsSystemWETLANDSProjectNameProjectAddressOwner!ManagementCompanyContactPhone(city)(ZipCode)_____ /_____/___ _ __ _Time____________AM/PMStormEventinLast72-hours?ElNoElYesWeatherConditionAdditionalNotesInspectionChecklistModularWetlandSystemType(Curb,GrateorUGVault):Size(22’,14’oretc.):WorkingCondition:Isthereevidenceofillicitdischargeorexcessiveoil,grease,orotherautomobilefluidsenteringandcloggingthunit?Istherestandingwaterininappropriateareasafteradryperiod?StructuralIntegrity:YesNoCommentsDamagetopre-treatmentaccesscovet(manholecover/grate)orcannotbeopenedusingnormalliftingpressure?Damagetodischargechamberaccesscover(manholecover/grate)orcannotbeopenedusingnormalliftingoressure?DoestheMWSunitshowsignsofstructuraldeterioration(cracksinthewall,damagetoframe)?Istheinlet/outletpipeordraindownpipedamagedorotherwisenotfunctioningproperly?Isthefilterinsert(ifapplicable)atcapacityand/oristhereanaccumulationofdebris/trashontheshelfsystem?Doesthedepthofsediment/trash/debrissuggestablockageoftheinflowpipe,bypassorcartridgefilter?Ifyesspecifywhichoneinthecommentssection.Notedepthofaccumulationininpre-treatmentchamber.Doesthecartridgefiltermedianeedreplacementinpre-treatmentchamberand/ordischargechamber?Anysignsofimproperfunctioninginthedischargechamber?Noteissuesincommentssection.OtherInspectionItems:Depth:ChamberIsthereanaccumulationofsediment/trash/debrisinthewetlandmedia(ifapplicable)?Isitevidentthattheplantsarealiveandhealthy(ifapplicable)?PleasenotePlantInformationbelow.Isthereasepticorfoulodorcomingfrominsidethesystem?Waste:Sediment/Silt/ClayTrash/Bags/BottlesGreenWaste/Leaves/FoliageYesNoRecommendedMaintenanceNoCleaningNeededScheduleMaintenanceasPlannedNeedsImmediateMaintenancePlantInformationDamagetoPlantsPlantReplacementPlantTrimminaAdditionalNotes:InspectorNameDateTypeofInspectionElRoutineElFollowUpElComplaintElStormForOfficeUseOnly(ReviewedBy)(Date)Officepersonneltocompletesectiontotheleft.2972SanLuisReyRoad,Oceanside,CA92058P(760)433-7640F(760)433-3176 InspectionFormModularWetlandSystem,Inc.P.760.433-7640F.760-433-3176E.Info@modularwetlands.comwww.modularwetlands.comMODULARWETLANDS BICleaningandMaintenanceReportENVIRONMENTALSERVICES.ModularWetlandsSystemProjectNameForOfficeUseOnlyProjectAddress(oily)(ZlyCode)(ReviewedBy)Owner/ManagementCompany__ _ _ _ _ _ _ _ _ _ _ ________ _ _ _ _ _(Date)OfficepersonneltocompletesectiontoContact_____________________________________________________Phonef)—theleftInspectorName______________________________________________Date______I______ /__ _ ___ _ _ ___Time___ _ _ _ _ _____ _ _ _ _AM/PMTypeofInspectionLIRoutineUFollowUpUComplaintUStormStormEventinLast72-hours?UNoUYesWeatherConditionAdditionalNotesConditionofMediaOperationalPerSiteGPSCoordinatesManufacturer/TrashFoliageSedimentTotalDebris25/50/75/100Manufactures’Map#ofInsertDescription/SizingAccumulationAccumulationAccumulationAccumulation(willbechangedSpecifications@75%)(Ifnot,why?)Lat:MWSCatchBasinsLong:MWSSedimentationBasinMediaFilterConditionPlantConditionDrainDownMediaConditionDischargeChamberConditionDrainDownPipeConditionInletandOutletPipeConditionComments2972SanLuisReyRoad,Oceanside,CA92058P.760.433.7640F.760.433.3176 SITESPECIFICDATAPROJECTNAME2335—MAR/OTTRESIDENCEINNPROJECTLOCATIONRENTON,WASTRUCTUREIDTREATMENTREQUIREDVOLUMEBASED(CE)2—YEARDISCHARGERATE(CE5)0.091TREATMENTHGLAVAILABLE(FT)PEAKBYPASSREQUIRED(CFS)—IFAPPLICABLE0.27PIPEDATAI.E.MATERIALDIAMETERINLETPIPE131.73PVC72”INLETPIPE2OUTLETPIPEJ1.23PVC12”PRETREATMENTBIOFILTRATIONDISCHARGERIMELEVATION40.0040.0040.00SURFACELOADPARKWAYPARKWAYPARKWAYFRAME&COVER030”2.5’X4’024”WETLANDMEDIAVOLUME(CY)4.79WETLANDMEDIADELIVERYMETHODPERCONTRACTORIFICESIZE(DIA.INCHES)TBDNOTES:INSTALLATIONNOTES1.CONTRACTORTOPROVIDEALLLABOR,EQUIPMENTMATERIALSANDINCIDENTALSREQUIREDTOOFFLOADANDINSTALLTHESYSTEMANDAPPURTENANCESINACCORDANCEWITHTHISDRAWINGANDTHEMANUFACTURERSSPECIFICATIONS,UNLESSOTHERWISESTATEDINMANUFACTURERSCONTRACT2.UNITMUSTBEINSTALLEDONLEVELBASEMANUFACTURERRECOMMENDSAMINIMUM6”LEVELROCKBASEUNLESSSPECIFIEDBYTHEPROJECTENGINEER.CONTRACTORISRESPONSIBLETOVERIFYPROJECTENGINEERSRECOMMENDEDBASESPECIFICATIONS.3.ALLPIPESMUSTBEFLUSHWITHINSIDESURFACEOFCONCRETE.(PIPESCANNOTINTRUDEBEYONDFLUSH).INVERTOFOUTFLOWPIPEMUSTBEFLUSHWITHDISCHARGECHAMBERFLOOR.ALLGAPSAROUNDPIPESSHALLBESEALEDWATERTIGHTWITHANON—SHRINKGROUTPERMANUFACTURERSSTANDARDCONNECTIONDETAILANDSHALLMEETOREXCEEDREGIONALPIPECONNECTIONSTANDARDS.4.CONTRACTORTOSUPPLYANDINSTALLALLEXTERNALCONNECTINGPIPES.5.CONTRACTORRESPONSIBLEFORINSTALLATIONOFALLRISERS,MANHOLES,ANDHATCHES.CONTRACTORTOGROUTALLMANHOLESANDHATCHESTOMATCHFINISHEDSURFACEUNLESSSPECIFIEDOTHERWISE.6.DRIPORSPRAYIRRIGATIONREQUIREDONALLUNITSWITHVEGETATION.GENERALNOTES1.MANUFACTURERTOPROVIDEALLMATERIALSUNLESSOTHERWISENOTED.2.ALLDIMENSIONS,ELEVATIONS,SPECIFICATIONSANDCAPACITIESARESUBJECTTOCHANGE.FORPROJECTSPECIFICDRAWINGSDETAILINGEXACTDIMENSIONS,WEIGHTSANDACCESSORIESPLEASECONTACTMANUFACTURER.ELEVATIONVIEWINTERNALBYPASSDISCLOSURE:ROCKLAYERTOPREVENTSCOURINGOUTLETPIPESEENOTESVOIDAREALEFTENDVIEWBIOFILTRATION/PRETREATMENTIL12PVC612PVC—o3,—O.THEDESIGNANDCAPACIIYOFTHEPEAKCONVEYANCEMETHODTOBEREVIEWEDANDAPPROVEDBYTHEENGINEEROFRECORD.HCL(S)ATPEAKFLOWSHALLBEASSESSEDTOENSURENOUPSTREAMFLOODING.PEAKHCLANDBYPASSCAPACI1YSHOWNONDRAWINGAREUSEDFORGUIDANCEONLYLOWINFLOWPIPEDISCLOSURE:ITISRECOMMENDEDTHATASUFFICIENTVARIATIONINELEVATIONBETWEENTHEINLETANDOUTLETBEPROVIDEDTOALLOWFORACCUMULATiONOFSEDIMENTINTHEPRE-TREATMENTCHAMBER.FAILURETODOSOMAYRESULTINBLOCKAGEATINFLOWPOINT(S)WHICHMAYCAUSEUPSTREAMFLOODING.THEPRODUCTDESCRIBEDMAY8EPROTECTEDBYONEORMOREOFTHEFOUO’NNGUSPATEN1S:7,425,262;7,470,362;7,674,378;8,303,616;RELA7ZDFOREIGNPATEN13OROTHERPA1EN7SPENDINGRIGHTENDVIEWDISCHARGE/8IOFILTRATIONPROPRIETARYANDCONFIDENTIAL:THEINFORMA17ONCONTAINEDINTHISDRAWINGISTHESOLEPROPERTYOFMODULARWETLANDSSYSTEMS.AM’REPRODUCTiONINPARTORASA11IOLEWITHOLifTHEWRI77ENPERMISSIONOFMODULARWETLANDSSYSTEMSISPROHIBITED.2YEARSDISCHARGERATE(CFS)0.091OPERATINGHEAD(Fr)2.8PRETREATMENTLOADINGRATE(GPM/SF)0.8ARwww.MduIrWeiI,r,d,nr,,IB555M00-WCIWETLANDMEDIALOADINGRATE(GPM/SF)0.5MWS-L-8-8-V-UGSTORMWATERBIOFILTRATIONSYSTEMSTANDARDDETAIL