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HomeMy WebLinkAboutTIR 3858R-3I1.engineeringplIcATSOfficeExpansion432ShattuckAvenueSouthRenton,WA98057TechnicalInformationReportAugust31,2015Theinformationcontainedinthisreportwaspreparedbyandunderthedirectsupervisionoftheundersigned:Lauriej.PfanRE.LPDEngineering,PLLC911WesternAvenue,Suite420Seatde,WA98104(206)725-I211Owner:TeamProperties,CCCContactBrianAllen432ShattuckAvenueSouthRenton,WA98057‘4_ctjnQEEQThV3QpPreparedbyPreparedfor:WeaverArchitectsContact:PaulGrundhoffer14114thAvenue,Suite810Seattle,WA98101(206)262-96221’t’ engineeringpIcATSOFFICEEXPANSIONTECHNICALINFORMATIONREPORTTABLEOFCONTENTSSectionI—ProjectOverviewSection2—ConditionsandRequirementsSummary3Section3—OffsiteAnalysis6Section4—FlowControlandWaterQualityFacilityAnalysisandDesign9Section5—ConveyanceSystemsAnalysisandDesign13Section6—SpecialReportsandStudies13Section7—OtherPermits14Section8—CSWPPPAnalysisandDesign14Section9—BondQuantities,FacilitySummaries,andDeclarationofCovenant14Section10—OperationsandMaintenanceManual14FIGURESFigureI:TIRWorksheetFigure2:VicinityMapFigure3:ExistingImperviousCoverageFigure4:ExistingConditionsFigure5:SoilsMapFigure6:ProposedConditionsFigure7:DownstreamDrainageMapAPPENDICESAppendixA—DesignDrawingsAppendixB—DesignCalculationsandSupportingInformationAppendixC—StormwaterPollutionPreventionandSpillPlan(SWPPS)&PreliminaryConstructionStormwaterPollutionPreventionPlan(SWPPP)NarrativeAppendixD—OperationandMaintenanceGuidelinesAppendixE—GeotechnicalReport engineeringpIcATSOFFICEEXPANSION432SHATTUCKAVESTECHNICALINFORMATIONREPORTAUGUST31,2015SECTIONI—PROJECTOVERVIEWThisTechnicalInformationReport(TIR)isforanewofficebuildingexpansion,adjacenttotheexistingATSAutomationbuilding.RefertoFigure1-TIRWorksheetforbasicsiteinformation.Theprojectislocatedat432ShattuckAvenueSwithintheCityofRenton.ThesiteisinSection18,Township23North,Range5East,WillametteMeridian.RefertoFigure2-VicinityMap.TheCityofRentonhasadoptedthe2009KingCountySurfaceWaterDesignManual(KCSWDM)withtheCity’sAmendments,datedFebruary2010.BasedupontheCityofRentonamendmentstothe2009KCSWDM,theprojectissubjecttodrainagereviewasitissubjecttoaCityofRentondevelopmentpermitbecauseitincludesgreaterthan2,000squarefeet(SF)ofnewplusreplacedimpervioussurfaceand7,000SFoflanddisturbingactivity.BaseduponFigure1.1.2.AintheRentonAmendments,theFlowChartforDeterminingTypeofDrainageReviewRequired,theprojectissubjecttoa“FullDrainageReview”becausetheprojectresultsingreaterthan2,000SFofnewpiusreplacedimpervioussurface,anditisnotalargeprojectorsinglefamilyresidentialproject.Perthe“FullDrainageReview”requirementsinTable1.1.2.A,theTIRaddressesCoreRequirements#1-sandSpecialRequirements#1-6oftheCityofRentonAmendmentstothe2009KCSWDM.Theproposedprojectisanewoffice/storagebuildingonthenorthsideoftheexistingATSbuilding,alongwithproposedparking,walkways,anddrainageinfrastructure.ExistingSiteTheprojectdisturbanceareawillmostlytakeplaceononeparcel(7841300175).Theparcelisabout0.95acres.Previously,thesiteconsistedofthreeindividualparcels,butaCityofRentonLotCombinationApplicationhasbeenapprovedinApril2015tocombinetheparcels.Theprojectdisturbanceareawillmostlybeonthenorthsideofthisparcel,consistingofanexistinggravelparkinglotandasmallcommercialbuildingthatwillbedemolished.OnthesouthernendofthisparcelistheexistingATSbuilding.Thetotaldisturbanceareaisapproximately16,909SF(0.388acres).Thedisturbanceareaalsoincludesaportionoftheright-of-wayalongShattuckAvenueSandthealleytothenortheastoftheATSsite.TheprojectareaisboundedbyShattuckAveStothewest,apublicalleytotheeast,asingle-familyresidencetothenorth,andtheexistingATSbuildingtothesouth.Theexistingtopographyonsiteisrelativelyflat,withslopesof0-2%throughouttheprojectdisturbancelimits.Basedonsitesurvey,theredoesnotappeartobeanystonTiwaterinfrastructurewithintheproposedprojectarea.ThereisanexistingpublicstormdrainmainlineonthewestsideofShattuckAvenue,towhichtheproposeddrainageinfrastructurewillconnect.LPDEngineeringPLLCPageIATSOfficeExpansionTechnicalInformationReport t‘HengineeringplicTheprojectisconsideredaredevelopmentprojectbaseduponthefollowingdefmitionfromtheRentonAmendmentstotheKCSWDM:“Redevelopmentprojectmeansaprojectthatproposestoadd,replace,orinod,i%’imperviousswfaces(forpurposesotherthanaresidentialsubdivisionor[1maintenance)onasitethatisalreadysubstantiallydevelopedinamannerconsistentwithitscurrentJzoningorwithalegalnon-conforminguse,orhasanexistingimpervioussufacecoverageof35%ormore.”AnaerialimagewasscaledandusedinAutoCADtodelineatetheexistingimperviouscoveragefortheparcel.Allbuilding,roof,concreteandasphaltsurfacesareconsideredimpervious.TheexistinggravelparkingareawasnotcountedasimperviousbasedupontheKCSWDM’sdefinitionof“newimpervious”surface,whichstatesthatproposedsurfacesoverexistinggravelarenewimpervioussurfaces(SeeSection4forfurtherexplanation).RefertoFigure3—ExistingImperviousCoverage.Theexistingimperviouscoverageisapproximately61%,whichexceeds35%andthereforetheprojectisconsideredaRedevelopment.[SeeFigure4—ExistingConditionsforalayoutoftheexistingimperviousareaswithinthedisturbancearea.[AccordingtotheUSDANaturalResourcesConservationService,thesitesoilsaremappedasUrbanLand.RefertoFigure5-SoilsMap.TheSCSSoilTypeisrecognizedasRenton(RE),classifiedundertheHydrologicSoilGroupDandwillbedefinedasTillinthestormwatercalculations(Table3.2.2.3,2009KCSWDM).AGeotechnicalEngineeringReporthasbeenpreparedbyPanGeo,Inc.datedDecember23,2014;acopyhasofbeenprovidedinAppendixE.Basedupontheexplorationpits,theunderlyingsoilsweregenerallydescribedassiltyclays.Groundwaterwasencounteredatadepthofabout8feetbelowgrade.ThesiteislocatedwithintheCedarValleySoleSourceAquiferarea.AccordingtoCityofRentonGIS,therearenootherenvironmentallysensitiveareaswithinorincloseproximitytothesite.ProposedSiteImprovementsProposedimprovementsincludeanewofficebuilding,constructedoffthenorthsideoftheexistingATSAutomationbuilding.Theexistingone-storycommercialbuildingnorthoftheexistingATSbuildingwillbedemolished.Apavedparkinglotwillbeestablishedalongthenorthandeastsidesofthebuildingexpansion,includingaheavydutyasphaltdrivinglanetoaccommodatetrucktraffic.Thewestpatioandonsiteportionofthewalkwaywillbesurfacedwithpermeablepayers.AccessimprovementswillbemadetoensureADAcompliance.Utilityimprovementsincludeanewfirehydrantassembly,connectingtotheexistingwaterlineinShattuckAvenue.Thereisanexisting6-inchsidesewerconnectioncomingontothesitenearthenorthwestcorneroftheexistingATSbuilding.Anewsidesewerconnectionisproposedforthe—buildingexpansion.tRefertoFigure6-ProposedConditionsforalayoutoftheproposedimprovements.tLPDEngineeringPLLCPage2MSOfficeExpansiontTechnicalInformationReportL engineeringpcProposedStormwaterManagementImprovementsAsnotedabove,theproposedprojectmeetsthecriteriasubjecttoa“FullDrainageReview.”Stonnwatermanagementimprovementsincludecatchbasinsandpipesforconveyance,alongwithroofdownspoutsfortheproposedbuildingaddition.TheprojectproposestheuseofFlowControlBMPstomitigaterunofffromtheimperviousareaassociatedwiththeproject.Thiswillconsistofperviouspayerstothesouthwestandsoutheastoftheofficebuildingaddition.Toaddresswaterqualitytreatmentrequirements,therewillbeatwo-facilitytreatmenttrain,consistingofawetvaultfollowedbyaStonnFilterstructureinstalledintheparkinglottothenorth.Thesitedischargepointisnearthenorthwestcornerofthedisturbancearea,withtheproposedconveyancesystemconnectingtotheexistingstormlineonthewestsideofShattuckAvenue.RefertoSection4ofthisreportformoteinformationregardingthestormwaterdesign.SECTION2—CONDITIONSANDREQUIREMENTSSUMMARYThissectionaddressestheCoreRequirements(Section1.2)andSpecialRequirements(Section1.3)requirementssetforthbytheCityofRentonAmendmentstothe2009KCSWDM.CoreRequirementsCoreRequirement1-DischargeatNaturalLocation(1.2.1):TheproposedstorrnwatersystemwillconnecttotheexistingstormlineinShattuckAvenueS.Drainagewillthenfollowtheexistingdownstreamdrainagepath.CoreRequirement2-Off-siteAnalysis(1.2.2):AnoffsiteanalysisfortheprojecthasbeencompletedandisincludedwithinSection3ofthisReport.CoreRequirement3—FlowControl(1.2.3):AccordingtotheRentonAmendmentstotheKCSWDMFlowControlApplicationMap(Reference11-A),theprojectsiteislocatedinaPeakRateFlowControlStandardArea.AccordingtotheRentonAmendmentstotheKCSWDMSection1.2.3.1.A,PeakRateFlowControlStandardAreas,flowcontrolmitigationtoexistingsiteconditionsisrequiredfortheproject’stargetsurfaces.Belowisadescriptionofthetargetsurfacesforthisproject:1.Newimperl.’ioussztrfacethatisnotfullydispersedperthecriteriainSection1.2.3.2(p.1-41).forindividuallotswithinresidentialsithdivisionprojects,theextentofnewimpervioussurfaceshaltbeassumedasspecUledinChapter3.Note,anynewimpervioussitifacesuchasabridgethatspanstheordinatyhighwaterofastream,pond,orlakemaybeexchtdedasatargetsm/aceftherunofffromsuchspanisconveyedtotheordinaiyhighwaterareainaccordancewithCriteria(b,),(c),(d),and(e,.)ofthe“DirectDischargeExemption”(p1-33).Newimpervioussurfaceswillbeconsideredatargetsurface.LPDEngineeringPIICPage3AISOfficeExpansionTechnicalInformationReport tengineeringpflc2.Newpervioussurfacethatisnotfullydispersed.Forindividuallotswithinresidentialsubdivisionprojects,theextentofnewpervioussurfaceshallbeassumedtobetheentirelotarea,excepttheassumedimperviousportionandanyportioninwhichnativeconditionsarepreservedbycovenant,tract,oreasement.Inaddition,thenewpervioussurfaceonindividuallotsshallbeassumedtobe100%grass.Theprojectdoesnotcreateany“new”pervioussurface.fThusbasedupontheaboverequirements,oniynewimpervioussurfaceswillbeconsideredas“TargetImperviousSurface.”However,asdescribedinSection4ofthisreport,aflowcontrolfacilityisnotrequiredduetoExceptionIinSection1.2.3.1oftheRentonAmendmentstotheKCSWDM,whichassertsthataflowcontrolfacilityisnotrequiredifthedifferenceinthe100-yearpeakrunoffratebetweentheexistingsiteconditionandthedevelopedconditionislessthan0.1cubicfeetpersecond(cfs).[FlowcontrolBMPsmustbeimplementedpersection1.2.3.3oftheRentonAmendmentstotheKCSWDM.FlowcontrolBMPswillincludeperviouspayers.RefertoSection4—FlowControlandrWaterQualityFacilityAnalysisandDesigninthisreportformoredetailedinformation.LCoreRequirement4-ConveyanceSystem(1.2.4):RefertoSection5ofthisReportfortheconveyancedesignandanalysis.CoreRequirement5-ErosionandSedimentationControl(1.2.5):Afulltemporaryerosionandsedimentationcontrol(TESC)planwillbeincludedwiththepermitsubmittal.Thisplanwillbeconsideredtheminimumforanticipatedsiteconditions.TheContractorwillberesponsibleforimplementingallTESCmeasuresandupgradingasnecessary.TheTESCfacilitieswillbeinplacepriortoanyclearing,grubbingorconstrctction.SeesheetCl.0inAppendixAandthepreliminaryconstructionstormwaterpollutionprevention(SWPPP)narrativeinAppendixC.CoreRequirement6-MaintenanceandOperations(1.2.6):Thepropertyownerwillmaintainandoperatethewaterqualitytreatmentfacilities.Conveyancefacilitiesanddrainagestructureswithintheright-of-wayand/ordrainageeasementswillbeoperatedandmaintainedbytheCityofRenton.AnOperationandMaintenanceManual,perSection2.3.1oftheRentonAmendmentstotheKCSWDM,willbeprovidedtothepropertyownerandCitypriortopermitissuance.OperationandMaintenanceGuidelinesareattachedinAppendixDofthisreport.CoreRequirement7—FinancialGuaranteesandLiability(1.2.7):Financialguaranteesandliabilityfortheproposedprojectwillbecompletedbytheownerpriortopermitissuance.CoreRequirement$—WaterQuality(1.2.8):Theredevelopmentprojectcontainsmorethan5,000SFofnewplusreplacedpollution-generatingimpervioussurface(PG1S)thatisnotfullydispersed.Becausethesiteisclassifiedascommerciallanduse,waterqualityfacilitiesmustbeselectedfromtheEnhancedBasicWQTreatmentMenu.Atwo-facilitytreatmenttrain,consistingofawetvaultfollowedbyaStorrnFilterstructurewaschosen.RefertoSection4ofthisreportforwaterqualityfacilitydesignandanalysis.LLPDEngineeringPLLCPage4ATSOfficeExpansiontTechnicalInformationReportt engineeringpcSpecialRequirementsSpecialRequirement1—OtherAdoptedArea-SpecificRequirements(1.3.1):•MasterDrainagePlans(7VIDPs,)—ProjectisnotwithinanareacoveredbyanapprovedMasterDrainagePlan.•BasinPlans(BPs,)—TheprojectsiteisintheBlackRiverdrainagebasin.ThereisnospecificbasinplanfortheBlackRiverbasin.•SalmonConservationPlans(SCPs,)—ProjectisnotwithinanareagovernedbyaSalmonConservationPlan.•StormwaterCompliancePlans(SWCPs)—TheprojectisnotwithinanareagovernedbyaSWCP.•floodHazardReductionPlan(FHRPs)—Theprojectsiteisnotwithinadesignatedfloodhazardarea.•SharedfacilityDrainagePlanfSFDPs,)—TheproposedprojectisnotwithinanareawithSFDP.SpecialRequirement2—FloodHazardAreaDelineation(1.3.2):Theprojectsiteisnotwithinoradjacenttoadesignatedfloodhazardarea.SpecialRequirement3—FloodProtectionFacilities(1.3.3):Theprojectdoesnotrelyonanexistingfloodprotectionfacility,norwillanewfloodprotectionfacilitybeconstrctcted;thereforethisrequirementisnotapplicable.SpecialRequirement4—SourceControl(1.3.4):Theprojectrequiresacommercialbuilding/commercialsitedevelopmentpermit;thereforesourcecontrolsareapplicableinaccordancewiththeKingCountyStorrnwaterPollutionPreventionManualandRentonMunicipalCodeIV.Waterqualityfacilitieswillincludeatwo-facilitytreatmenttrainfromtheEnhancedBasicWaterQualityMenuoftheKCSWDM.SpecialRequirement5—OilControl(1.3.5):Theprojectwillnothavehigh-usesitecharacteristics;thereforeoilcontrolsarenotapplicable.SpecialRequirement6—AquiferProtectionArea(1.3.6):PerReference11-B,theprojectiswithinthe“CedarValleySoleSourceAquiferProjectReviewArea.”However,theprojectisnotwithinanAquiferProtectionArea(APA)zone.LPDEngineeringPLICPage5ATSOfficeExpansionTechnicalInformationReport rengineeringp1cSECTION3—OFFSITEANALYSISThefollowingistheLevel1downstreamanalysisfortheproposedproject.RefertoFigure7-UDownstreamDrainageMap.TaskI—StudyAreaDefinitionandMapsThestudyareaconsistsofoneparcels(7841300175)andthetotaldisturbanceareaisabout0.388acres.Thedownstreamanalysisfortheprojectsiteisbaseduponthefollowingresources:•SiteSurvey,completedbyDuncansonCompany,Inc.•KingCountyiMap•CityofRentonOnlineGISMapApplicationTask2—ResourceReviewBasinSummaryBaseduponKingCountyiMap,thesiteislocatedwithintheBlackRiverdrainagebasin,whichiswithintheDuwarnish-GreenRiverWatershed.floodwayMap[PerFEMAFloodInsuranceRateMapNumber53033C0977F,thesiteisnotlocatedwithinfloodwayorfloodplain.SensitiveAreasThesensitiveareaswithinone-mileupstreamanddownstreamofthesubjectpropertywereexaminedusingtheCityofRentonAmendmentstothe2009KCSWDMandKingCountyiMapapplication.Thefollowingarethesensitiveareadesignationsfortheprojectsiteandwithinonemiledownstreamofthesite:•SAOErosionHazard—Theprojectisnotwithinadesignatederosionhazardarea.[•SAOSeismicHazard—Theprojectsiteisnotwithinadesignatedseismichazardarea.•SAOLandslideHazard—Theprojectisnotwithinadesignatedlandslidehazardarea.•SAOCoalMine-Therearenoknowncoalminesonthesiteorwithinonemileofthesite.•SAOStream—Therearenostreamswithintheprojectsiteorwithinthedownstreamdrainagecourse.•SAOWetland—Therearenowetlandslocatedwithintheprojectsiteorwithinthedownstreamdrainagecourse.•GroundwaterContamination-Theprojectsiteandupstreamstudyareaarewithinanareadesignatedasa“low”groundwatercontaminationzone.•SoleSourceAquifer—AccordingtoReference11-BandiMap,theprojectsitearea,upstreamarea,anddownstreamareaarewithintheCedarValleySoleSourceAquifer.•ChannelMigrationHazard-Therearenoknownchannelmigrationhazardsonthesiteorwithinonemileofthesite.L[PDEngineeringPCLCPage6ATSOfficeExpansion[TechnicalInformaonReportL HIengineeringplicCriticalAreasThecriticalareaswithinonemileupstreamanddownstreamofthesubjectpropertywereexaminedusingtheKingCountyGISiMapapplication.BasedontheGISmapping,thefollowingarethecriticalareadesignationsfortheprojectsiteandwithinonemiledownstreamofthesite:•Criticalareaordinance(CAO)BasinCondition—Theprojectarea,upstreamarea,anddownstreamareaisdesignatedas“low.”The“low”basinconditiondesignationisduetothehighdevelopmentintensitywithintheprojectanddownstreamarea.Themajorityoftheprojectsiteanddownstreamareahasreducedforestcoverandlargeamountsofimpervioussurfaces.•Criticalareaordinance(CAO)ShorelineCondition—Theprojectsite,upstreamarea,anddownstreamareaarenotwithinaCAOShorelineCondition.TopographicMapThetopographicinformationforthesiteisshownontheGradingandDrainagePlan.(RefertoAppendixA).DrainageComplaintsAccordingtoKingCounty’siMapprogram,therehavebeennodrainagecomplaintswithinthelast10yearswithintheprojectsite,upstreamarea,ordownstreamarea.KingCountySoilsSurveyAccordingtotheUSDANaturalResourcesConservationService,thesitesoilsaremappedasUrbanLand(Ur).RefertoFigure5-SoilsMap.AGeotechnicalEngineeringReporthasbeenpreparedbyPanGeo,Inc.datedDecember23,2014.ThegeotechnicalreportisattachedinAppendixE.MigratingRiverStudiesAccordingtoKingCoctntyiMap,theprojectsiteisnotlocatedwithinachannelmigrationhazardarea.303dListofPollutedWatersTherearenowatersthatarewithintheprojectsiteareaorwithinone-miledownstreamoftheprojectsitethatareonthecurrentWashingtonStateDepartmentofEcology’sCleanWaterAct303dlist.WaterQualityProblemsAccordingtoKingCounty’siMapprogram,neithertheprojectsite,northedownstreamareaiswithinadesignatedKingCountywaterqualityproblemarea.[PDEngineeringPL[CPage7ATSOfficeExpansionTechnicalInformationReport ‘UengineeringplicTask3—FieldInspectionOnsiteConditionsCurrentlythereisacommercialbuildinglocatedintheprojectareanorthoftheexistingATSbuilding.Tothenorthofthecommercialbuildingisagraveldrive.Tothewestofthecommercialbuildingisasmallpavedparkingarea.TheexistingATSbuildingandthesmallcommercialbuildingareseparatedbyadriveway.[Topographyofthesiteisgenerallyflat,slopingdowninthenortherlydirectionatanapproximateslopeof1%.Theredoesnotappeartobeanyonsitestorrnwaterinfrastructurewithintheprojectdisturbancearea.UpstreamAreasDuetotheflattopographyoftheprojectarea,offsiterunofffromthesurroundingpropertiesisassumedtobelimitedtonone.[Task4—DrainageSystemDescriptionandProblemDescriptionsAsdescribedearlier,duetotherelativelyflattopography,stormwaterisassumedtosheetflowwestoff[thesite,andthenflowssouthwardalongtheexistingcurb.AtthemanholeattheintersectionofShattuckAvenueSandS4thPlace,thedrainagecoursecansplitintwodirections(westandsouth),bothjoiningfurtherdownstream.RefertoFigure7—DownstreamDrainageMap.Belowisadescriptionofthe“west”downstreamdrainagecourse:LSurfacerunoffwillflowalongthecurbandenteraninletstructureand12—inchstormdrainlineneartheintersectionofShattuckAvenueSandS4thPlace.2.The12-inchsystemflowswest,becomingan1$-inchsystemafteramanholeinthecenteroftheaforementionedintersection.3.The18-inchstormdrainsystemconveysflowwestboundalongS4thPlaceforabout570feettoamanholeneartheintersectionofS4üiPlaceandRainierAvenueS.4.Fromthismanhole,thesystemturnssouthandconveysflowalongRainierAvenueStoanothermanholeapproximately270feettothesouth.[5.Thestorrnwatersystemturnswestandentersastormwaterpumpstation.Theforce-mainpipedsystemcontinueswestforabout$$0feetthroughanexistingparkinglottoamanholeatthenorthwestcornerofthelot,passingthe¼-milepointdownstreamfromthesite.6.Atthispoint,thesystembecomesa60-inchgravitysystemthatflowstoamanholewithinHardieAvenueSW.7.Thestormsystembecomes60-inchandcontinueswestthroughanotherparkinglot.Thesystemreducesto4$-inchandturnssoLithatastructureapproximately$25feetawayfromthemanholeinHardieAvenueSW.8.Afterthepipedsystemflowssouthforabout340feet,reachingamanholeinSW7thStreet,thepipedsystembecomes54-inchandturnstothewest.[9.The54-inchsystemdischargesintoavaultneartheintersectionofSW71StreetandLindAvenueSW.Theoutletfromthevatiltisa60-inchpipedsystemthatcontinueswestalongSW7thStreet.10.The60-inchsystemcontinuestothewestforapproximatelyanother2,700feettoamanholeatthenorthwestcorneroftheintersectionofSW7thStreetandNachesAvenueSW.11.The60-inchstormlineheadsnorthforapproximately640feetandoutfallsintotheBlackRiveratapointabout1.25milesfromthesite.12.TheBlackRivereventuallydischargestotheDuwamishRiver.IPDEngineeringPLLCPage8ATSOfficeExpansionTechnicalInformationReport[ engineeringpcThefollowingisthe“south”downstreamdrainagecourse,startingfromthemanholeindicatedin#2above.13.FromthemanholeattheintersectionofShattuckAvenue&41Place,a4$-inchconveyancesystemcontinuessouthalongShattuckAvenueSforabout1,150feet.14.This4$-inchstormlineentersavaultwithintheintersectionofShattuckAveSandSW7thStreet.15.Theoutletisa60-inchstormlineheadinginthewestbounddirectionforabout2,500feet,whereitentersavault(seeitem8above)attheintersectionofLindAvenueSWandSW71Street.Alongthisstretchof60-inchstormdrainmain,thesystempassesthe¼-milepointdownstreamfromthesite.16.Fromthispoint,thedownstreamcourseisthesameas#8-11fromthe“west”downstreamcoursenotedabove.SECTION4—FLOWCONTROLANDWATERQUALITYFACILITYANALYSISANDDESIGNExistingSiteHydrologyBasedonthesitesurvey,thereisnoexistingstormwaterinfrastructurewithintheprojectdisturbancearea.ItisasscimedthatrLrnofffromthewestsideofthesitesheetflowsandleavesthesiteatthedrivewaycutnearthesmallparkingareatothewestoftheexistingcommercialbuilding.RunofffromtheeastsideofthesiteappearstoflowtowardacatchbasinintheexistingATSparkinglot,southeastoftheprojectarea.BasedonsitetopographyandGISinformation,theeastbounddrainageisassumedtojointhesamedownstreamcourseasthewestboundrunoff.RefertotheOffsiteAnalysissectionforinformation.DevelopedSiteHydrologyTheproposeddrainagedesignincludescatchbasinsandconveyancepipesthrotighouttheparkinglottocollectandconveystonnwater.Thestormwaterisroutedtowardthenorthwestcornerofthesite,wheretherunofffromthepollution-generatingimperviousstirfaces(PGIS)willberoutedtotheproposedwetvaultandStormFiltersystemforwaterqualitytreatment.Theroofsurfaceswillberoutednorthtoacatchbasindownstreamofthewaterqualitytreatmentsystems.Fromthiscatchbasin,aproposed12-inchstormdrainlinewillconnecttotheexistingstormmaininShattuckAvenueS.RefertosheetC2.0inAppendixA,whichshowsthestormdrainageplanforthesite.FlowControlSystemTheproposedprojectimprovementswillincludetheconstructionofanewofficebuildingexpansionandaccompanyingparkinglot,alongwithwalkways.RefertoFigure6—ProposedConditions,whichshowstheproposedsiteconditionsandasummaryofthesurfaceareas.TheprojectiswithinaPeakRateFlowControlStandardarea,andthusthetrueexistingconditionsareallowedtobeevaluatedasthepredevelopedcondition.Persection1.2.3.1oftheRentonAmendmentstotheKCSWDM,Execptionlwasevaluatedtodetermineifflowcontrolfacilitiesarenecessary.LPDEngineeringPCLCPage9ATSOfficeExpansionTechnicalInformationReport tengineeringp1cException1states:“ThefacilityreqitirementinPeakflowControlStandardAreasiswaivedforanythresholddischargeareainwhichthetargetsurfacessubjecttothisrequirementwiltgeneratenomorethana0.1-cfsincreaseintheexistingsiteconditions100-yearpeakflow.”Sothegravelwillnotbeconsideredanexistingimpervioussurfaceinthecalculations.AccordingtotheRentonAmendmentstotheKCSWDM,thedefinitionfornewimpervioussurfaceis“theadditionofahardorcompactedsurfacelikeroofs,pavement,gravel,ordirt,ortheadditionofamorecompactedsurface,likepavingoverpre-existingdirtorgraveL”Thus,theexistinggravelparkingonthenorthsideofthesitethatwillbereplacedbypavingwillbeconsideredanewimpervioussurface.Therefore,theexistinggravelisnotcountedanexistingimpervioussurface.[Table1showsabreakdownoftheproposedeffectiveimpervioussurfacesandhowthetargetimpervioussurfacewasdetermined.Theperviouspayerswillbemodeledas50%impervious,50%grassperTablel.2.3.CoftheKCSWDM.Allotherimpervioctssurfaceswillbeconsidered100%effectiveimpervious.Areasinvolvingutilitytrenchingwerenotcountedasnew/replacedorexistingimpervioussurfaces.[Table1—ProposedEffectiveImperviousAreas______________________SquareFeetAcresNewPlusReplacedBuilding41400095(Consideredtobe100%effectiveimpervious)NewPlusReplacedStandardConcreteI7160039(Consideredtobe100%effectiveimpervious)NewPlusReplacedAsphalt71810165(Consideredtobe100%effectiveimpervious)NewPlusReplacedPerviousPayers5790013(1,158SFtotal,consideredtobe50%effectiveimpervious)TotalNewPlusReplacedImpervious13,6160.313ExistingImpervioustobeRemoved(ReplacedImpervious)(Consideredasreplacedimperviousanddeductedfromthetotalabovetogivethenew-7,9I7-0.I82impervioussurface.SeeFigure4forexistingimperviousarea)TotalNewImperviousSurface56990131(TargetImperviousSurface)Asoutlinedpreviously,onlynewimpervioussurfaceswillbeconsideredasthetargetimpervioussurfacerequiringflowcontrolmitigationandBMPs.However,Exception1ofthePeakRateFlowControlStandardareawasevaluated,whichallowsforthecomparisonof100-yearpeakflowratesbetweenthedevelopedconditionandthetrueexistingsiteconditions.UsingtheKingCountyRunoffTimeSeries(KCRTS),thepeakflowratesforthedevelopedconditionandthepredevelopedexistingsiteconditionswasdetermined.TheKCRTSoutputisincludedinAppendixB.Inthepredevelopedtimeseries,the0.182acresofexistingimpervious(SeeFigure4)wasmodeledasimpervious,whiletheremainingareawasmodeledastillgrass.Thedevelopedtimeseriesincludesproposedsiteconditions,whichconsistsofatotalnewplusreplacedimperviousof0.313LPDEngineeringPLLCPage10ATSOfficeExpansionTechnicalInformationReport[CCCC[[[L[t engineeringp1cacres(SeeTable1)andtheremainingareamodeledastillgrass.Thefollowingtablesummarizesthe100-yearpeakflowrates.Table2—100-yearPeakFlowRatesI00-yearExistingSiteConditionsPeakFlowRate0.130cfsI00-yearDevelopedSiteConditionsPeakFlowRate0.164cfsDifferenceinI00-yrPeakFlowRate0.034cfsThedifferencebetweenthepeakflowratesintheexistingsiteconditionsanddevelopedsiteconditionsrunoffinthe100-yeareventisbelowthe0.1cfsthreshold;thereforeaflowcontrolfacilityisnotrequired.However,flowcontrolBMPsarestillrequired.FlowControlBMPsAccordingtoSection5.2.1oftheKCSWDM,sincethesiteareaisgreaterthan22.000squarefeetwithmorethan45%imperviouscoverage,theprojectischaracterizedas“LargeLotHighImpervious.”ThereforeflowcontrolBMPsmustbeevaluatedpersection5.2.1.3oftheKCSWDM.Fulldispersionofroofrunoffwillnotbefeasibleduetothelackofunpavedopenspaceonthesite.TheprojectmustimplementanotheroptionfromthelistedBMPsinsection5.2.1.3.Theprojectwillresultinimpervioussurfacecoverageofmorethan65%;therefore,flowcontrolBMPsmustbeappliedtoanimperviousareaequalto10%ofthesite/lotor20%ofthetargetimpervioussurface,whicheverisless.Inthiscase,thelesservalueis20%ofthetargetimpervioussurface(5,699SF),whichmeansaminimumof1,140SFofimperviousareamustbemitigatedwithaflowcontrolBMP.LPDEngineeringPLLCPageIIAISOfficeExpansionTechnicalInformationReport tengineeringplicBelowisFigure5.2.LAfromtheKCSWDM,outliningthepathdescribedaboveforFlowControlBMPs.Listheprojectanasiteliotsmallerthan22,000squarefeat?fea&bleaedapp)cebletoimplementfullYesNofurtherOMPsroofareaasparAnyproposedSectionC.2.17connecionofroofNodowospoutstolocaldrainagesystemmustbeIsitfeasibleviaperforateddispersionforthequired.Noto:andapplicableptpoconnectiontoimplementSectionfullinfiltrationrunoffasperpeoftheroofSectionC.2.2?NofurtherBfslPsrequired.Note:AnyproposedconnectionofroofdownspautstolocaldrainagesystemmustbeviaperforatedpIpeconnectionperSection0,2.11.ThechosenFlowControlBMPforthisprojectispermeablepayers.SeesheetC3.1foradetailofthepermeablepayers.Thepermeablepaversurfacewillbeusedonthepatiossouthwestandsoutheastoftheproposedbuildingaddition(excludingtherampandstairs).Thetotalareaofthepermeablepayersis1,158SF,thussatisfyingtheflowcontrolBMPtequirements.LFIGtJRE5.2.LAFLOtVCIIARTFORDETERMINCINDiVIDUALLOTlIMPREQUIREMENTSApplyonoormornofthefollowingtoimperviousarea510%ofsite/lotforsite/lotsizesci1,000stand20%ofsite/lotforsite/lotsizesbetween11,000and22,000sf(Forprojectslocatedincf/i/calaquiferrechargeareastheseimperviousareaamountsdouble):1.LImitedInfiltration(Section0.2.3)2.BasIcDispersIon(SectionC.2.4)3.ReInGarden(Secllon0.2.5)4.PermeablePavement(SechonC.2.6)5.RainwaterHarvestIng(SectionC.2.7)6.VegetatedRoof(SeclionC.2.8)7.ReducedImpervIousServIceCredit(SectionC.2.9)6.NatIveGrowthRetentionCredit(SectionCOW)[1ttCC[CCCCC[[No[istheprojectenssite/tot22,000squaretoot1orlargerwIthImpervIoussurfaceYes.isitfeasibleandcoverageof45%ortoss?IapplicabletoimplementfulldispersiononallestargetimpervloussurfaceasperOneormoreofthefollowIngBMPsmustbeimplementedSectionC.2.17forthatportionoftargetimpervioussurfacenotaddressedwithfuitdispersIonorwIthMiintltrationofroofrunoff:No1,FullInfiltration(Section0.2.2orSection5.4)tiieaatbleandapp/icableto2.LimItedinfiltration(SectionC.2.3)NojImplemontfulltnttttratlonof3.BasIcDispersion(SectIon0.2.4)‘jtheroofrunoffasper4.RaInGarden(SectionC,2.5)SectionC.2.2orSection5.4?5.PermeablePavement(Section0.2.6)Yes6.RaInwaterHarvesting(SectionC.2,7)Yes________________________________7.VegetatedRoof(SectionC.28)Iatiaraanyremainingtarget8.ReducedimpervIousServiceCredit(Section0.2.9)impervioussurfacenot9.NativeGrowthRetentionCredIt(SectIon0.2.10)addressedwithfuildispersionorrTheprojectmustbeasIte/tot22,000squaretootIitfeasibleandorlargerw/thimpervioussurfacei‘9eppilcabietoImplementcoverageofmorethan45/a?IfuitdispersiononalltargetimperviousNosurfaceasperProjectswithImperviousareagreaterthan45%andequaltoorSectIon0.2.1?lessthan65%oneormoroofthetoilowingmustbeappliedloanimperviousareagreaterthanorequal1020%ofthesiteor40%ofYestiletargetimpervioussurfacewhichevertolessORforprojects__________________greaterthan65%ImperviousoneormoreofthefollowingmustbeNoturtherBMPsappliedloanimperviousareagreaterthanorequalto10%ofsiterequired.Note:ir20%oftargetimpervioussurface,whicheveriatoes:AnyproposedI.Fullinfiltration(Section5.4)connectionofroof2.LImitedInfiltration(SectionC.2.3)downopoutsto3.BasteDispersion(Section0.2.4)localdrainage4.RainGarden(Section0.2.5)systemmsuolbe5.PermeablePavement(SeclionC.2Zdjlvieperforated6.RaInwaterHarvesting(SectionC.2.7)pipeconnection7.VegetatedRoof(Suntan0.2.8)perSection8.ReducedimperviousServiceCredit(SectionC.2.9(0.2.11.9.NetlvoGrowthRetentionCredIt(Seclion0.2.10)[PDEngineeringPLLCPage12Al’SOfficeExpansionTechnicalInformadonReporttCC engineeringpcWaterQualityTreatmentAsdescribedearlier,theredevelopmentprojectcontainsmorethan5,000SFofnewplusreplacedpollution-generatingimpervioussurface(PGIS)thatisnotftillydispersed.Theprojectwillhavecommerciallanduse,thusrequiringtheutilizationoftheEnhancedBasicWaterQualityMenupersection6.1.2oftheKCSWDM.Atwo-facilitytreatmenttrainisproposedintheparkinglotareanorthoftheproposedofficebuilding.ThetreatmenttrainwillincludeawetvaultfollowedbyaStormFilterstructurewithleafcompost(CSf)media.Thewetvaultwassizedpersection6.4.1.1ofthe2009KCSWDM.Aminimumwetpoolvolumeof843cubicfeetwascalculatedbaseduponthetributaryimperviousareas.ThewetpoolcalculationspreadsheetisincludedinAppendixB.Thewetvaultwillhavedimensionsof24’x6’x8’,allowingfor6feetofpenTianentwetpoolstorage,1footoffreeboard,and1footofsedimentstorage.Theactualwetpoolvolumewillbe$64cubicfeet.TheStormFilterstructurewasdesignedwithinputfromContechStormwaterSolutions.Persection6.5.5.1oftheKCSWDM,theCSFStormFilterforenhancebasictreatmentmustbe“sizedusingboththeflow-basedandmass-basedmethods,andthedesignershallselecttheresultyieldingthelargernumberofcartridges.”ThewaterqualityflowforStormFiherswithCSFmediaforenhancedbasictreatmentis60%ofthedeveloped2-yearflow.BasedonContech’sanalysis,theflow-basedmethodyieldedmorecartridges.Therefore,theStormFilterstructurewillhave4cartridgeswithina60-inchmanhole.RefertoContech’sStormFiltercostestimateattachedinAppendixB.AlsorefertothedetailsofboththewetvaultandStormFilteronsheetC2.1inAppendixA.SECTION5—CONVEYANCESYSTEMSANALYSISANDDESIGNTheproposedconveyancesystemwasdesignedinaccordancewiththe2009KCSWDM.Theproposedconveyancesystemsaresizedtoconveyatminimumthe25-yearrunoffeventwithoutovertopping.Theproposed12-inchstormdrainlineconnectingtotheexisting18-inchlinewasanalyzedforconveyance.Thispipewasassumedtobeconveyingflowfromtheentireprojectarea,whichisatributaryimperviousareaof13,645SF(0.313acres).SeetheConveyanceAnalysisWorksheetandassociatedKCRTSOutputinAppendixB.Thefull-flowcapacityofthepipewasdeterminedusingManning’sEquation.Theproposed12-inchpipe(n0.011)isataslopeof1.7%,whichyieldsafull-flowcapacityof5.50cubicfeetpersecond(cfs).KCRTSwasusedwith15-minutetimesteptofindthe25-yearand100-yearpeakflow,whichwerefoundtobe0.30cfsand0.41cfs,respectively.Thus,theproposedconveyancesystemwillhaveadequatecapacitytoaccommodatethe25-yearand100-yearstormevent.SECTION6—SPECIALREPORTSANDSTUDIESAgeotechnicalreport,datedDecember23,2014,hasbeenconductedbyPanGeo,Inc.andisattachedinAppendixEofthisreport.[PDEngineeringP[[CPage13ATSOfficeExpansionTechnicalInformationReport [HIengineeringplicSECTION7—OTHERPERMITSTherewillbenootherpermitsrequiredfortlisproject.[SECTION8—CSWPPPANALYSISANDDESIGNTheconstructionstormwaterpollutionpreventionplan(CSWPPP)consistsoftheTESCplaninthedrawingsetwiththeaccompanyingpreliminaryconstructionSWPPPnarrativeperthe2012WashingtonStateDepartmentofEcology(DOE)StorrnwaterManagementManualforWesternWashington,andaStormwaterPollutionPreventionandSpill(SWPPS)planpertheRentonAmendmentstotheKCSWDM.TheTESCplanisinAppendixA,whiletheSWPPPnarrativeandSWPPSplanareprovidedinAppendixCofthisreport.[SizingcalculationswereperformedforasedimentsettlingfacilityandthecalculationsareincludedinAppendixB.TheproposedweWaultwillbeutilizedasasedimentsettlingfacilityintheTESCphase.SeetheSWPPPnarrativeformoreinformation.-SECTION9—BONDQUANTITIES,FACILITYSUMMARIES,ANDDECLARATION[OFCOVENANTfinancialguaranteesandliabilityfortheproposedprojectwillbecompletedbyownerpriortopermit[issuance.SECTION10—OPERATIONSANDMAINTENANCEMANUALRecommendedoperationsandmaintenanceguidelinesforthestormwaterdrainagefacilitieslocatedwithintheprojectareprovidedinAppendixDofthisreport.AnOperationsandMaintenanceManual,persection2.3.1oftheRentonAmendmentstotheKCSWDM,willbeprovidedwiththepermitsubmittal.[CCCtLPDEngineeringPLICPage14ATSOfficeExpansion[TechnicalInformationReportt engineeringpCFIGURESFigureI:TIRWorksheetFigure2:VicinityMapFigure3:ExistingImperviousCoverageFigure4:ExistingConditionsFigure5:SoilsMapFigure6:ProposedConditionsFigure7:DownstreamDrainageMapII Figure1-hRWorksheetKINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEETPart2PROJECTLOCATIONANDDESCRIPTION____________________ProjectNameATSAm&kior___________________________DDESPermit#_ _ _ _ _ _ ____ _ _ _ _ _ _ ____ _____________________________LocationTownship2.3(\j___________________________RangeSE_______________________Section1__ __ __ __ __ __ __ __ __ __ _SiteAddress13%Skok%’JEk.Ave..S___________________________PartIPROJECTOWNERANDPROJECTENGINEERProjectOwnerT€orneLi_CPhoneC’12)2Sl9(0OAddressttE()Sk&4-uckAvS.R€,rc’1tAAO7ProjectEngineerMo’rcSe.rvz,PECompanyL?t)Ern€2cir,LLC.Phone(ZO72Sl21iPart3TYPEOFPERMITAPPLICATION121LanduseSeMcesSubdivisonIShortSubd./UPDBuildinSrvicesM/F/3/SFRCleatingandGrading2)Right-of-WayUse21OtherPart4OTHERREVIEWSANDPERMITS121DEWHPA121Shoreline21COE404Management121DOEDamSafetyStructuralRockeryNauIt!_____LIFEMAFloodplainJESASection7LICOEWetlandsLIOther_ _ _ ___ _ _Part5PLANANDREPORTINFORMATIONTechnicalInformationReportSiteImprovementPlan(Engr.Plans)TypeofDrainageReviewITargeted/Type(circleone):(jIModified(circle):LargeSiteSmallSiteDate(includerevisionDate(includerevisiondates):dates):DateofFinal:—DateofFinal:Part6ADJUSTMENTAPPROVALSType(circleone):StandardIComplex/Preapplication/ExperimentalIBlanketDescription:(includeconditionsinTIRSection2)DateofApproval:2009SurfaceWaterDesignManualI1/9/2009 KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORTfuR)WORKSHEET[1Part7MONITORINGREQUIREMENTSMonitoringRequired:Yes/f(Describe:StartDate:CompletionDate:Part8SITECOMMUNITYANDDRAINAGEBASINCommunityPlan:•_____________________________SpecialDistrictOverlays:A)!ADrainageBasin:•1aJLStormwaterRequirements:P€uk)re.ItUJC-*\riAcirckPart9ONSITEANDADJACENTSENSITIVEAREASLiRiver/StreamLiSteepSlopeLiLakeUErosionHazardLiA1I’,r,rULandslideHazard21ClosedDepressionLiCoalMineHazardLiFloodplainLiSeismicHazard21OtherLiHabitatProtectionLiElUUCCCCCCI:CCCPart10SOILSSoilTypeSlopesErosionPotentialLiHighGroundwaterTable(within5feet)SoleSourceAquiferLiOtherLiSeeps/SpringsLiAdditionalSheetsAttached2009SutfaceWaterDesignManual21/9/2009 KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEETPart11DRAINAGEDESIGNLIMITATIONSREFERENCELIMITATION/SITECONSTRAINTL1Core2—OtfsiteAnalysisIIISensitive/CriticalAreasUSEPAUOtherU__________________UAdditionalSheetsAttachedPart12TIRSUMMARYSHEET(provideonehRSummarySheetperThresholdDischargeArea)ThresholdDischargeArea:(nameordescription)FTS%%4Aie.CoreRequirements(all8apply)DischargeatNaturalLocationNumberofNaturalDischargeLocations:jOffsiteAnalysisLevel:(13/2/3dated:t/ilt)i5FlowControlLevel:II2/3orExemptionNumber_find,facilitysummarysheet)SmallSiteBMPsc\e.rr+ConveyanceSystemSpillcontainmentlocatedat:ErosionandSedimentControlESCSiteSupervisor:ContactPhone:-rtciAfterHoursPhone:MaintenanceandOperationResponsibility:IPublicIfPrivate,MaintenanceLogRequired:YesFinancialGuaranteesandProvided:Yes/NoLiabilityIWaterQualityType:BasicISens.LakeIfEljJiTi/Bog(includefacilitysummarysheet)orExemptionNo.LandscapeManagementPlan:YesSpecialRequirements(asapplicable)AreaSpecificDrainageType:CDAI500/MOP/BPILMP/SharedFac.RequirementsName:Floodplain/FloodwayDelineation...Type:MajorIMinorIExemption/(iNon)100-yearBaseFloodElevation(orrange):Datum:FloodProtectionFacilitiesDescribe:N/SourceControlDescribelanduse:coer&\(comm./industriallanduse)Describeanystructuralcontrols:N/Pt2009SurfaceWaterDesignManual1/9/2009 KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEET2009SurfaceWaterDesignManual1/9/2009UUU[OilControlHigh-useSite:YesTreatmentBMP:MaintenanceAgreement:YesILt)withwhom?Describe:CiOtherDrainaaeStructuresPart13EROSIONANDSEDIMENTCONTROlREQUIREMENTSMINIMUMESCREQUIREMENTSDURINGCONSTRUCTIONIIClearingLimitsCoverMeasuresPerimeterProtectionTrafficAreaStabilizationSedimentRetentionSurfaceWaterCollectionDewateringControlDustControlFlowControlMINIMUMESCREQUIREMENTSAFTERCONSTRUCTIONStabilizeExposedSurfacesRemoveandRestoreTemporaryESCFacilitiesCleanandRemoveAllSiltandDebris,EnsureOperationofPermanentFacilitiesLIFlagLimitsofSAOandopenspacepreservationareasLIOtherU][1[1UUU]ElElElCCCCCPart14STORMWATERFACILITYDESCRIPTIONS(Note:IncludeFacilitySummaryandSketch)FlowControlType/Description—WaterQualityType/DescriptionLIDetentionLIBiofiltrationLIInfiltrationLIWetpoolLIRegionalFacilityMediaFiltrationS-rctil\efC5feAcLISharedFacilityLIOilControlFlowControlLISpillControlBMPsFlowControlBMPsLIOtherlJOtherWTVO..UU KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEETPart15EASEMENTS/TRACTSPart16STRUCTURALANALYSISLiDrainageEasementLiCastinPlaceVaultLiCovenantLiRetainingWallLiNativeGrowthProtectionCovenantLiRockery>4’HighLiTractLiStructuralonSteepSlopeLiOtherLiOtherPart17SIGNATUREOFPROFESSIONALENGINEERI,oracivilengineerundermysupervision,havevisitedthesite.ActualsiteconditionsasobservedwereincorporatedintothisworksheetaSl&theattachedTechnicalInformationReport.Tothebestofmyknowlgtheiriormationp9vid’edhereisaccurate.7//_1/I//Sianed/Dáte2009StirfaceWaterDesignManual51/9/2009I ATSAUTOMATION911WesternAve.,DESCRIPTIONMAY4,2015FIGURESuite420,!HSeattle,WA98104p206725.1211VICINITYMAP21.206.973,5344engineeringp11Cwww.lpdengineering.com ,-1-PROJECT9,——Iz1i__rAREAnC,’.Qjc-)N4ThP110Scale1“=60’EXISJJNGIMPERVIOUSCOVERAGEL’%..’%IExistingImperviousTotalSiteArea0.58ACPercentageofSiteImpervious0.95ACAThLOT©2015LPDEngineeringPLLCIIDESCRIPTIONengineeringp11cwww.lpdengineering.comATSAUTOMATIONMAY4,2015FIGUREEXISTINGIMPERVIOUSCOVER,GE c)HrLi-FtmLc)LI,I.HULN01530Sca’e1“=30’ImperviousAreaSummaryJJEXISTINGIMPERVIOUSAREA7,917SF(0.182Ac)—IAVEL—:PARKING;\ç.IzJ-I-———____w1Ln-YThENcl*1Q!!EXIS11NG.IPROJECTRgus_V/////ZAREA“I\i\HJI----______II\\‘.=,I‘Ii.EXISTING.:EJ___tI--N\\\-l:zAL...,.______‘-j*i’-j-‘eJ’\VrT,/‘—1—I‘‘CCJ-,I-/‘Sf’/‘\II‘Ij‘‘•IIj->7fIZEZ——TOTALEXISTINGIMPERVIOUSAREA7917SF(0182Ac)1’—r———I1%,X’JI—1201,1 C,,.)I—-Ir-————\----‘—______-{tfJi/////——--/J///‘////-77/-‘-Ifr-’‘-L)///I!---i--/-//Ii/4Th,t*71:--rJ\\t//NIi/-——+‘_,--,I-iI/-‘-‘-—/2II --iTrI-rrV.‘EXISTINGATS‘JiEOJEDEAS--=-BUILDING-“II-/--____________________-ATSAUTOMATION©2015LPDEngineeringPLLC911WesternAve,DESCRIPTIONMAY4,2015FIGURESuite420,EXISTINGCONDITIONSf.206,973.5344engIlleerIng3IIC —NKINGCOUNTYAREA,WASHINGTON(WA633)APUNITSYMBOLMAPUNITNAMEUrUrbanLandCCCw012-JU)-ccCCCC0U)ATSAUTOMATION Qicicicicicici.QiciciQiLLItLATSAUTOMATION©2015LPDEngineeringPLLCIDESCRIPTIONengineeringp11Cwww.lpdengineering.comPROPOSEDCONDITIONSMAY4,2015FIGUREHN01530Scale1“=30AreaSummary-:-L;::.-I-I.,II-CO(X1ETIOEXSDSTORMRLTERPROJECT’_____AULT/AREA--r_____fIlLL:1OLO0’000o0o0o00’IV700709’O00I1.oOhuoOOoOoOoQ’o000I0O0’00000t.N0oo0000‘0Q0ogogogo00-000000o0o0o0o0o0o00000Q0I———r’.r’.-00000000’00\i:goggggjJL-\00--o--9000Oo:1ti--cD,/“/,//////////‘/N1/,///,/,/000000b00•tso0o0bo1Iff!‘‘oo’Oo°II—/II\N11‘luLloo0000CaIj-1cI\/Qgoogogog--ij•a0000c0o0o0Ii\---oo-oooUa“/‘///z‘0000/BUILDING‘//-0-0o0o/I\—,/000000ci‘-—%2000_‘\cI-,-I-/I,-I-,’I000-___—_—ii..LIi—‘i00/_______—\-‘];IIL///0000‘I-’,I--’,’I‘0/I/I-/—————///,HWi-’,/__j/--J7jtH—/—‘“‘/I.L‘N/—FLOWCONTROLBMP‘\“]c7/’/PERMEABLEPAVERSiiII7-158SF-tri2ivNorI,——---FEw/RAbEoI-JMPa-_________________New/ReplacedAreasVBUILDING4,140SF(0.095AC)/(100%EFFECTIVEIMPERVIOUS)\‘..\‘\STANDARDCONCRETE1,716SF(0.039AC)\\\(100%EFFECTIVEIMPERVIOUS)LcJ000ASPHALT7,181SF(0.165AC)000(100%EFFECTIVEIMPERVIOUS)F/IiIPERVIOUSPAVERS579SF(0.013AC),I.JI7,I(1,158SFAT50%EFFECTIVEIMPERVIOUS)TOTALNEWPLUSREPLACEDEFFECTIVEIMPERVIOUSAREA13,616SF(0.313AC)EXISTINGIMPERVIOUSAREAFROMFIGURE4(DEDUCT)7,917SF(—0.182AC)NEWIMPERVIOUSAREA(*TARGETIMPERVIOUSSURFACE)*5,699SF(0.131AC) ©tJ(J1File:Figure7—DownstreamDrainageMap.dwgPath:S:\LPDEngineeringPLLC\Projects\WeaverArchitects\AISAutomationRenton\Drainage\TIRExhibI—II9-‘._n_3>(03mci,C-,-D0,>-IC,,>C-0>0z:>z>0m>-v0zCr,m>CDG)=mN Vengineeringpc.APPENDIXADesignDocuments SEC 18,WIP 23N,R 5E,W.M. _____ ATS AUTOMATION -OLD MILWAUKEE SUBSTATION ADDITION ! CONDITIONS OF APPROVAL THE PRDPOON SITE PlAN AND MOLIFTC4I1ON REQUEST FOR THE ATO CIPMISION.FUE NO LUll 5—00470,ECF,NW,TA—A.ARE AOPRENCO SUBJECT To THE FOUZAN4O CONLITTONSI A DEtHAZO LANDSCAPE PLAN.COMPLIANT WON OlE RAC 4—0—12W SHALL 10 SIJBNTTED AT ThE TIlE OF WILLING POINT REVIEW.THE DEIMOR LANDSCAPE PLAN SHALL INCLWEI 0.PLMIITNW BETWEEN THE 101000110 IRON FENCE AND LIDEANJI ON THE NORTHEAST CURNEN OF THE PROJECT SOt AL A MHAUUM 5-rOOt HIDE LANDSCAPE STRIP SHALL BE PROVIDED BETWEEN THE PROPOSED PAWING LOT AND NORTH PROPERTY UNO IN ALIRTON.EVENGBEEN SHRUBS TONI BE INSTALLED WITHIN TOE 5—FOOT NODE LANDSCAPE STRIP TO FURTHER BUFFER THE NORTHOR4 PROPERTY FROM THE PROPD PROJECT; LOFRECIFAUN 0011 STREET TREES AND 4 OF B THEE GRATES WOOER NOTCH THE DESIGN OF THE FRISTND GRHTtS ALONG SHATTUCK AVENUE THE DEIM.FR LMIW000E PLAN SHALL DO REVIEWOD AND M’PROSEO THE CURRENT PLANNING PROJECT IWILAGER PRIOR TO THE ISSUANCE OF THE BUlLING POMILT.LAN050APING SHALL BE INSTALLED PRIOR TO CERWIGATE RE OCCUPANCY. 2.A ROOTED PLAN 011111 10 STRUTTED AT TUE TONE OF BDNLLING PERUT REVIEW PRENILING AT LEAST 3 UNEAL.FEET OF SEAliNG AREA (BENCH, LEDGE.ETC)OR ONE INOMODLAL SEAT PEN NO SQUARE FEET RE PLAZA ANON WITHIN THE WENT PLAZA.THE REVISED STE PLAN SHALL BE 0301*11100 TO THE CURRENT PLANNING PROJECT MANAGER FDR TEVEW ANDAPPROVALPRIORTOTHEONOANCEOFTHEWILLINGPOINT.SENTNG ORAL].BE INSTALLED PRIOR TO COITFIGATE OF OCCUPANCY. 3.A UGHTHIG PLAN SHILL NE SILBNTTTED AT THE TINE RE WILLING PENNT RENEW SEM0110TRATTNG COMPLIANCE WITH NBC 4—4—075 LHAITNC. UlTERIOR.ON-SUE.THE UGHTNG PLAN SHALL 10 SUBMITTED TO THE CURRENT PLANNING PROJECT MANAGER FOR RENEW 4110 AJ’PRUVAL PRIOR 10 THE 50110CC OF A INJULIAD PERMIT. 4.AN ANBURIST SHALL 10 ON SITE LIJRRIG CONSTRUCTION OF THE PLAZA TO ENDURE TREE PROTECTION S SILFFSTENT TO ENSURE SURAWAL OF THE EA1STNG 1110!10 10 RETAINED AOJACENT TO THE PLAZA. 5.A REVISED SITE PLAN MACH COMPLON WON THE WCSCLC RELIJIRENUKIS OR A MOURCATION TO SHE REOUBED OCACLE P04000 SPACES THLTUKE IN RNC 4—4—DBOF.l1 SHALL BE IOAN1TTE AT ONE OF BLIWNC POINT REVIEW.THE 1011500 SITE PLAN SHILL NE SUBMITTED TO THE CURRENT PLANNING PROJECT MANAGER FOR RENEW AND APPROVAL PRIOR TO THE 1503014CC RE A DUASR4O PERMIT. B.A REVISED SOC PLAN SHILL 10 SUBMITTED AT THE TINE OF OLALLINGPERNTREVIEWDEVIONSIRATRICCOMPLIANCE10THTHETIREDOFARTUCI4T ACCESS BEOUROILENTS.THE TENSER STE PLAN SHALL 10 SUBMITTED TOSHEFINEDEPARTMENTFORREVIEWANDAPPROVALPRIOR10THEISSUANCE RE A NULOND PERMIT. 7.A REVISED SOC PLAN SHALL NE PROVIT2ES AT THE TNE OF BULLINGP00110REVIEWREPLACINGTHESTRIPESWAIJIWATSWITHAWALIONAYOF A NFTTROIITUNTED MATERIAL (E STAIIPES CONCRETE OR PAYERS).THE REVISED SITE PLAN SF1111 BE SUBMITTED TO THE CURRENT PLANNING PROJECT 11401001 FOR RENEW AND APPROVAL PRIOR THE ISOJANCE RE AWILLINGPERMIT. GLOAT ATS AUTOMATION THUMILWAUKEE SURSTATUFI 401SIIflflHEXnWNUE& RENTUN.WAPOUTS IYC*’,Cqp 450 SHATTUCK AVE S -RENTON,WA 98055 THSr VICINITY MAP IMPERVIOUS AREA —40110 WILE —0051010 INPTRI4ILIJS AREA (TO 10 REMOVED):L2i2...LO NEW IMPERVIOUS UREAI 0,TDLOECMLENGINEERTOTALNEWPUBSREPLACEDIMPTIOROUS AREAL 3O1LQELPDENGINEERING,PU.CBITWESTERNARE,STOIC 420 SEATTlE,WA 00104CONTACT:MARC SERACI PHONE.(200)72S—I2IIflINGIMARCSOLPDENGWEERING.COMAEROITE.ANIN.UPSENGNSERING.COM BENCHMARK NEAREST BENCHMARK S COT OF RENTON SURREY CO1IIRGI.NETWORK MONUMENT NO.073. DCV =3102 FEET (CUIAIENTEU) LEGAL DESCRIPTION 5*610 V-NO’ SHEET INDEX 0.0 100K AND SIT WONOTHA 01.1 1000 0140 0040 FUR P10 MUONS 01.2 1000 DETAiLS Cli 1000 ANTON TOP NOARIN OW ORANAUE Cli 00010*00 000’LE *001 0000101 012 01*14*10 NOSES 0010 NEIMAN 010 0101W *610 P40140 DIP PAWJO NOON MO XTMLS engieeñTg pIIc- tn COVER I— LOIS 2 AND 0 IN BLOCO 2 OF SUTROIS FFTH AMOTION TO THE TORN OFRET4TON,ACUOWINO 10 PLAT RECORDED IN VOLUME IS RE PLATO AT PACE 33,IN KING COUNTY.WASHINGTON. SITUATE IN SHE CITY RE RENTDN.CLILNTT RE KING,STATE OF WASHINGTON. 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IA.DUD 600 760900 66000665 16 65001101 0010.000 66000,9160.99 16 90120 995161 001 66210 60 A 00010 06 990 (I)6046 214 210160600 2 -410W DOD /16 —40%11009664 8*0 1020 0404 2 010 700 /TO — 000)691 P90101118*1 600 (*0), ATE AUTOMATON 0415011051601160101621 £66 00000100 4060600 9. 016190.160060* IOLI04IILIJS engineering pUn ORAINAOE NOTES ANO U 0ETAILS -— LU [1JH.H —pJ .4/) 1zz —LU ‘r, ,... .1111...— [N.frs/j COR STD PLAN 100.00-CS TOPS I 1 CORSTE PLAN 201.00-CS TYPE 2 2 CORSTE PLAN 202.00-CR INSTALL000N 3 -j(7;. - /‘L\[/.1 / -14.- ---: j:h 77r COR STE PLAN 204.00-RECTANGULAR FRAME 5 Iii L Hi COR STE PLAN 204.40-RECTANGULAR GRATE 6 1.0 0016 016600 7190 (160)1W 0-01 006) IA 6009806 0110600 660 (698)998 I-fl 00*) 1,0.4100019960010 0066116006 670 141160)(09 0-fl 000) CITYOF RENTON DRAINAGE NOTES 8 COR DID PLAN 204.50-ROUNDP50)45 AND COVER 7 __ ———L_Z3 [EJJ J L1J [:z .IJ E [1 lSURfsflE.PROVDG 1D1SHEO GRACE THCXENED EDGE & It.AG uou I.ri COR SOD PLAN 204.60-MISCELLANEOUS EDAINAGE DETAIlS 1 ,//.-I CLEAN.OUT TO GRADE 2 CLENr ATS AUTOMATION OLD OIMVOUKEESUBSTATODN RJITON ABr-so k’fl*ULLI IIII_ engineering plIc NOT USED 4 vj 1 ; L NOTUSED 5 NOT USED 6 NOT USED 7 U) w QDRAINAGE DETAILS F —- w ive’i0VL,.JmONAVUGNVSI1I7I1fltimI)________—IF]]CON)100O’N110I_______IOLUWd(O)IvdrmadiO00000d2110000010fl1OLfl001200004OV(a0033000)0I10000001000014/0010300003000010405001010fl000010011000(00400101NODOlSOUHOd—__________000110030—(0001)00100005—————31101100004—--—LJL.JLULUEUEl]Cr7El][1E1mianbA12011840100040100000fltVfld003NI010(1SIIIPOM£ROD///01/,-amo0010WONS00.005010Ol005_._0011fl0000III102000.0140410=_____001010010144303000000rS0401/0101004Odd3044*000FOols54010045103I3401100943103CI)000d010000]fl1/II/‘‘LLH:::L—•l•:.::r_•I00I10IH.DIIbusuiuoN04041001I’II031NIWHY1UHI{SI;,NlstVtLSflS310flYl,1110010NOIIVrOlflVsly-10312ON1(40)110001104001100AH04)r7 21Ia8fc\\\I’!IJPtH829r2—1—F L__J L I i L HJ H1 r’i ‘1 ,‘i Mn 4.F Lx 70403 40401 8 Th 06401 0 9001 4040004.406144404 2.49-644 4132.4040 0101 lOW 730404 #6/45 4003403439417 TICE 9444. 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I 032640,tan.C On 0 F 94445 604C 4131 10321 CEOSORL 04421.9040040 4040 CE 04 •Mn 404.040 40034 94411 SORT 49459344 05180 043.3440 3-TO 44-400.00 1m333100. 040 3 4104.10.1 0004 003 901 001.4419 3510 4030 11004140418440004500 10 01 2441 9101 001 4/IC 4944100 FILL 94041 4034 9943.43044 9311 194ff4 4/IC Ion421432140444404005-4440 SILL 41 240 404 400 &40,1 49115 40 21 5394 3,/C •4040 401510 41 44394491 ADA)I wn’c 4 400364 23130 04494403.0 940434 4110410 4141444.40230-MM40440CE40014400414044424440444404440449404014004 Mn nfl 450174040341413040412310. 04043400414404004410404 4410394444 41044004144,14404440040 I90 1 441 94044094994140 00103420041040454444104340404411412443400494944149425-42410 454 1040640 9444193104404040 CE 401 7414440.401412331 441 41 4/040064441414904144040044400100CE84410409440409141741040140214044134444044045-00194 8.0414 F 4410 040.10 94 436 07441 940444.040 01 41/040194230404003141€130411 9411 CE 4044000 F 405410114 404043114544440101—1101 30 41310 44440 4140440€741/400190440994141041040431640€0-491410 CE 369474241 94—4149460400 44404410 21394 10. 440444440 1/0430314400441 40 0040440400494450403044—33.4(3/0946140 40 40 40610 040r hJCV 1-’H 9040.94-40 340 41 944145440 449439944447 040440 4/044404134004 44 944904 940244 5431 Mn I.F 0 0040140440 9004,40940 404400 444040406000340904 I 03214400-48049400-n 04160404445-34. 4,0440140 404211 041 TOT 9401 41743010040441041044005-04.940409493414044044019043104406944040040410004074094 41. 19434051/241040.0 0040 140410340139200404400434409440402103040942104049400040710040.40.0 44006 4104040440 40447260’S 07040 4040/0490 41731 11193 ATS AUTOMATION TIn6133450414065474491 4411.314730914421/, ITL04FL;Jp 4 9405 4493414 ccsEwTtwa 3 engineering plic ‘(4 -a Ip40l 57304 “Ii. BCAJ 6 C3.2 I’! LEIEEELEZLEE]L*1[IIEEEf-98£991NDSISWL313DOD-UWV1dCSHOD\?/N7’r’\K-”fr•fl-vvv.Jsiiviaa&inan;omCD4n-a___——.ElrVAa—zgdbupaauibua1IIIrll*ThlHcftIS9flS33WWM1KiUtNOIiVrlOlflVCIVISiflOAviSC*CMJ}MJOAN-USCNY1JCSHODo?G1YJNVHOAHSJJ-[SC[WICJCSHOD?t!lt.IUSaVSSCN7SDZSCi—mlci[iCvaaNV]IBIVM-NYuCSHOD-J—LI‘4Th’I”\’dIII-‘54dYIISM-LOX1WWCSHODHILHr iFFtC]i L__.:J L...........J mr lit.TEE NEEd r. . I rmxit..,.,EX 8. 50tr tOIL It 10M1 OThEEl PITS AT t 100100 000 ONEEI t01 .t ITET.WA1H 1€pDLE II I I ILENT ATE AUTOMATION aDVLWILKEESCSTTATIDAI D2i1CN.ViA9L55 engineering pflc 15001 WATER LINE PROFILE F In MI MX ?DTL5 HIengineeringplicAPPENDIXBDesignCalculationsandSupportingInformation (FlowControlExemptionKCRTSProgram...FileDirectory:C:\KC_SWDM\KC_DATA\[C]CREATEanewTimeSeriesST0.000.000.210.000.000.000.000.18PREDEVTSFT1.00000T[C]CREATEaST0.000.000.080.000.000.000.000.31DEV.TSFT1.00000(ExistingSiteConditions0.000.000.000.000.000.000.000.00newTimeSeries0.000.000.000.000.000.000.000.00input.excTillForestTillPastureTillGrassoutwashForestOutwashPastureOutwashGrassWetlandImperviousTillForestTillPastureTillGrassoutwashForestOutwashPastureoutwashGrasswet]andImpervious0.0000000.0000000.0000000.0000000.0000000.0000000.0000000.0000000.0000000.0000000.0000000.0000000.0000000.0000000.0000000.000000IDevelopedSiteConditionsT[T]EntertheAnalysisTOOLSModule[p]ComputePEAKSandFlowFrequenciesptedev.tsfPREDEV.pks[p1ComputePEAKSandFlowFrequenciesdev.tsfDEV.pks[R]RETURNtoPreviousMenu[x]eXitKCRTSProgramPage1 FlowControlExemption:ExistingSiteConditionsFlowFrequencyAnalysisTimeSeriesFile:predev.tsfProjectLocation:Sea-Tac-—-AnnualFlowRate(CFS)0.0630.0480.0760.0490.0600.0660.0720.130ComputedPeaksFlowFrequencyAnalysis--Peaks--RankReturnProb(CFS)Period0.1301100.0010.9900.076225.000.9600.072310.000.9000.06645.000.8000.06353.000.6670.06062.000.5000.04971.300.2310.04881.100.0910.11250.000.980ElPREDEV.pksPeakFlowRates---RankTimeofPeak52/09/0181/05/0222/27/0378/26/04610/28/0441/18/06310/26/0611/09/082:0016:007:002:0016:0016:000:006:00ElElElU,ElElElElElElElElElCLCCPage1 FlowControlExemption:DevelopedSiteConditionsFlowFrequencyAnalysisTimeSeriesFile:dev.tsfProjectLocation:Sea-TacDEV.pks---AnnualPeakFlowRates---FlowFrequencyAnalysisFlowRateRankTimeofPeak--Peaks--RankReturnProb(cF5)(cFS)Period0.08362/09/012:00I0.1641100.00I0.9900.07081/05/0216:000.116225.000.9600.100312/08/0218:000.100310.000.9000.07978/26/042:000.09545.000.8000.095410/28/0416:000.08853.000.6670.08851/18/0616:000.08362.000.5000.116210/26/060:000.07971.300.2310.16411/09/086:000.07081.100.091computedPeaks0.14850.000.980Page1 0ElINPUTVALUESAREINBLUE2009KINGCOUNTYSURFACEWATERDESIGNMAUALWETPOOLCALCULATIONSDate:412812015ProjectATSOffice/Warehouse(PERMITLEVELCALCS)Area:PGISPARKINGProjectAssumptions:2010CityofRentonDrainageCodeEnhancedWaterQnalityMeeaVr=(0.9Ai+025kg+0.loAtf+0.OlAo)a(R1l2)(6-12)where,Vr=voluweofrveofffrommeaeannualstorm(cuhicfeet)Ad=areaofimpervioussurface(sqIt)kg=areaoftillsoilcoveredwithgrass(sqft)Ad=areaoftillsoilcoveredwithforest(sqIc)Ao=areaofontwushtoilconeredwithgrassorforest(sqft)ff12=rainfallfrommeananvnulstorm(feet)CovercategoriesarehatedonenistingU.S.DepartmentofAgriculturesoilsurveydunorsitespecificdunwhereavailable.CalculatewetpoolvolumeVb.Usetheresultofthepreviousstepstocalculatetherequiredwetpoolvolumeaccordingtothefollowingequatiov:VbfaVr(6-13)where,Vb=wetpoolvolume(cv5)=volumefactorfromStepIVr=runoffvolume(cubicfeet)fromStepIVr=(0.9Ai+O25Atg+0.loAtf+0.OlAo)a(R/l2)Ai=7971SF0.183acre0.18chktutulureakg=0SF0.000acresAd=0SF0.000acresAo=0SF0.000acres0.47ff12=0.0392Vr=281CFVbNr=3ForBasicWetpondVbNrSForLargeWetpondUseBasicWetpoolwithVbNr=3.0Vh=843Cv.Ft.WaterQualityVolumeWetvaultdemensions:Vh=(h(Al+A2fl12(6-IS)where,Vb=wetpoolvolume(ci)=wecpooldepth(It)Al=waterqualitydesignsurfacearea(si)A2=bottomureaofwetpool)si)W=widthofvault(ft)L=levgthofvault(ft)Vb=(h(Al+A2fl12Vh=843CFh=6rAl=140SFA2=140SF*Aflowlength-to-widthratiogreaterthan3:1minimumisdesirableW=6FTL=24FTusedimentDepth(frombottomofsidewall)is0”CCCC CNTECHENGINEEREDSOLUTIONS-SizeandCostEstimatePreparedbyStephanieJacobsenonApril28,2015432ShattuckAveS—StormwaterTreatmentSystemRenton,WAInformationprovided:•Totalcontributingarea0.18acre[•Imperviousarea=0.18acre•Detentionreleaserate=0.O52cfs•Presidingagency=KingCountytAssumptions:L•Media=CSFcartridges•Percartridgeflowrate=7.5gpm•Droprequiredfrominlettooutlet=2.3’minimumSizeandcostestimates:TheStormFilterisaflow-basedsystem,andtherefore,issizedbycalculatingthepeakwaterqualityflowratetassociatedwiththedesignstorm.However,whentheStormFilterisplaceddownstreamofdetentiontheflowrategeneratedatthewaterqualitystormisnotalwaysrepresentativeofthetotalvolumeofwaterthatwillgothroughthesystemortypeofpollutant-loadingthesystemmayexperienceinoneyear.Forthissite,ContechEngineeredSolutionsLLCrecommendsusinga60”ManholeStormFilterwith4cartridges(seeattacheddetail).Theestimatedcostofthissystemis$19,200,completeanddeliveredtothejobsite.ThisUestimateassumesthatthevaultis6feetdeep.Thefinalsystemcostwilldependontheactualdepthoftheunitandwhetherextraslikedoorsratherthancastingsarespecified.ThecontractorisresponsibleforsettingtheStormFilterandallexternalplumbing.Typically,precastStormFiltershaveinternalbypasscapacitiesof1.8cfs.Ifthepeakdischargeoffthesiteisexpectedtoexceedthisrate,werecommendplacingahigh-flowbypassupstreamoftheStormFiltersystem.ContechEngineeredSolutionscouldprovideourhigh-flowbypass,theStormGate,whichprovidesacombinationweir-orificecontrolstructuretolimittheflowtotheStormFilter.Theestimatedcostofthisstructureis$4,500.Thefinalcostwoulddependontheactualdepthandsizeoftheunit.©2012ContechEngineeredSolutionsLLC11835NEGlennWidingDr.,PortlandOR97220Page1of1www.ContechES.comToll-free:800.548.4667Fax:800.561.1271TS-P022 CDeterminingNumberofCNTECHCartridgesforSystemsCENGINEEREDSOLUTIONSDownstreamofDetentionCONTECHStormwaterSolutionsInc.Engineer:SKJDate4/2812015SiteInformationProjectName432ShattuckAveSProjectStateWashingtonProjectLocationRentonDrainageArea,Ad0.18acImperviousArea,Ai0.18acPerviousArea,Ap0.00%Impervious100%RunoffCoefficient,Rc0.95UpstreamDetentionSystemPeakreleaseratefromdetention,Qreteasepeak0.22cfsTreatmentreleaseratefromdetention,Qreieasetreat0.05cfsDetentionpretreatmentcredit50%(fromremovalefficiencycalcs)MassloadingcalculationsMeanAnnualRainfall,P38inAgencyrequired%removal80%PercentRunoffCapture90%MeanAnnualRunoff,V21,583ftEventMeanConcentrationofPollutant,EMC70mg/IAnnualMassLoad,Mtotai94.26lbsFilterSystemFiltrationbrandStormFilterCartridgeheight18inSpecificFlowRate1.00gpm/ft2Numberofcartridges-massloadingMassremovedbypretreatmentsystem,Mpre47.13lbsMassloadtofiltersafterpretreatment,Mpassi4713lbsEstimatetherequiredfilterefficiency,Efilte-0.60Masstobecapturedbyfilters,Miter28.28lbsAllowableCartridgeFlowrate,Q7.50Massloadpercartridge,Mca(Ibs)36.00lbsNumberofCartridgesrequired,Nmass1TreatmentCapacity0.02cfs[DetermineCriticalSizingValueNumberofCartridgesusingQreieasetreat’N04MethodtoUse:HYDRAULICSUMMARYTreatmentFlowRate,cfs0.05CartridgeFlowRate,gpm7.5NumberofCartridges4rlof1 ATS Office Expansion -432 Shattuck Ave S 5/4/2015 Conveyance Analysis Spreadsheet rrrrrrrrEnEnEnEnEnEnEnEnEnEnEn IConveyance-outletfromsiteFlowFrequencyAnalysisTimeSeriesFile:dev.tsfProjectLocation:Sea-Tac--—AnnualFlowRate(cFs)0.1490.1040.2980.1200.1630.1720.2050.407ComputedPeaksFlowFrequencyAnalysis--Peaks--RankReturnProb(CFS)period0.4071100.000.9900.298225.000.9600.205310.000.9000.17245.000.8000.16353.000.6670.14962.000.5000.12071.300.2310.10481.100.0910.37150.000.980DEV.pkSPeakFlowRates---RankTimeofPeak68/27/0189/17/02212/08/0278/23/04510/28/04410/27/05310/25/0611/09/0818:0017:4517:1514:3016:0010:4522:456:30Page1 ttSedimentSizingCalculationsPerSectionD.3.5.1ofthe2009KingCountySurfaceWaterDesignManual[ProjectName:ATSOfficeExpansion432ShattuckAveS[]RequiredSedimentTrapSurfaceArea(SA):SA=2*QNsedWhere:Q=2-yeardevelopedflowratefromKCRTS[with15-minutetimestepsVsed=SettlingVelocity(0.00096Wsec)Calculation:multiplier=20.15cfsVsed=0.00096fpsRequiredSA=312.5squarefeetEquivalentSedimentTrapVolume:Todeterminetheminimumsedimenttrapvolume,anequivalentsedimenttrapwassizedbasedupontherequiredsurfacearea.LengthofTopSurfaceArea=18feetWidthofTopSurfaceArea=18feetSurfaceAreaProvided=324squarefeetSideSlope=3(H:1V)TotalDepthofSedimentTrap=3.5feetBottomLengthofSedimentTrap=-3feetBottomWidthofSedimentTrap=-3feetTotalpondVolume=582.75cubicfeet4358.97gallonsSedimentVolumeprovidedwithdetentionvault:VaultInteriorDimensions:24x6x8TotalVolumeprovided:1,152CF(8,617gallons)t[[[[ TESCSizingFlowFrequencyAnalysisTimeSeriesFile:dev.tsfProjectLocation:Sea-TacDEV.pks---AnnualPeakFlowRates---FlowFrequencyAnalysisFlowRateRankTimeofPeak- -Peaks--RankReturnProb(cFS)(CFS)Period0.15068/27/0118:000.4081100.000.9900.10589/17/0217:450.299225.000.9600.299212/08/0217:150.205310.000.9000.12178/23/0414:300.17245.000.8000.163510/28/0416:000.16353.000.6670.172410/27/0510:45I0.15062.0010.5000.205310/25/0622:450.12171.300.2310.40811/09/086:300.10581.100.091ComputedPeaks0.37150.000.980Page1 engineeringpc.APPENDIXCStormwaterPollutionPreventionaixiSpillPlan(SWPPS)&PreliminaryConstructionStormwaterPollutionPreventionPlan(SWPPP)Narrative IATSOfficeExpansionIStormwaterPollutionPreventionandSpillPlanMay4,1015engineeringpIcATSOFFICEEXPANSIONSTORMWATERPOLLUTIONPREVENTIONANDSPILLPLANMAY4,2015ThefollowingreportisinaccordancewiththeCityofRentonAmendmentstothe2009KingCountySurfaceWaterDesignManualSection2.3.1.4fortheStormwaterPollutionPreventionandSpill(SWPPS)Plan.ThefollowingisasummaryoftheitemstobeaddressedontheTESCPlanofthecontractdocumentsandanindicationoftheirapplicabilitytothisproject.PARTA:ACTIVITYSPECIFICINFORMATIONREQUIREDStorageandHandlingofLiquids:Nopetroleumproducts,fuel,solvents,detergents,paint,pesticides,andconcreteadmixturesareexpectedtobestoredonsite.Theremaybesmallquantitiesofpaintorformoilstoredonsiteduringconstruction.Theyareexpectedtobestoredinaprotectedareasuchasinsideaconstructiontrailer,orinsideafencedenclosureinthecontractor’sworkarea.Exactquantitiesandstoragelocationsarenotknownatthistime.StorageandStockpilingofConstructionMaterialsandWastes:Constructionmaterialsandwastemaybestockpiledtemporarilybutshallbehauledoffregularly.RefertoNote2belowforadditionalinformation.fueling:Nostationaryfueltankwillbeallowedonsiteduringconstruction.fuelingwillbeallowedonsiteduringdaylighthoursonlybyamobilefueltruck,andonlyinpavedareas.Refertonotes3,4,and5belowforadditionalinformation.Maintenance,Repairs,andStorageofVehiclesandEquipment:Equipmentthatrequiressignificantrepairwillberemovedfromthesitetorepair.Minorrepairsormaintenancemaybeallowedonsiteonlyinanapprovedarea.Refertonote6belowforadditionalinformation.ConcreteSawCutting,Slurry,andWashwaterDisposal:Theprojectanticipateslimitedconcretesawcutting.Allconcretesawcuttingslurryshaltbecontrolledsuchthatitdoesnotcontaminateonsitestormwater.Concretetruckwashoutwillnotbeallowedonsite.Refertonote7below.HandlingofpHElevatedWater:Becauseconstructionstormwaterrunoffwillberoutedtoasedimentsettlingtank,monitoringforelevatedpHcanbeconductedasnecessarybysamplingfromthetank.PageI IATSOfficeExpansionIStormwaterPollutionPreventionandSpillPlanMay4,2015engineeringplIc____________________________________LApplicationofChemicalsincludingPesticidesandfertilizers:Nochemicalsareexpectedtobeusedinthisproject.PARTB:SWPPSSITEPLANRefertoSheetC1.1ofthedrawings.Also,perSection2.3.1.4.BoftheRentonAmendmentstotheKCSWDM:1.Liquidsincludingpetroleumproducts,fuel,solvents,detergents,pesticides,and[concreteadmixturesarenotanticipatedtobestoredonsite.Ifproductssuchasfuelarerequired,theseitemswillbebroughtinsmallquantities,used,andremovedfromthesite.Itemssuchaspaintorformoils,ifneeded,willbedeliveredtothesiteinsmallquantitiesandstoredinsideaconstructiontrailerpriortouse.Anoteisincludedontheplanasfollows:“Nohazardousliquidproductsincludingbutnotlimitedtopetroleumproducts,fuel,solvents,detergents,paint,pesticides,concreteadmixturesandformoilsshallbestoredon-sitewithoutpriorapproval.Ifrequested,theContractorshallprovideforspillcontainmentinaccordancewithCityofRentonrequirements.Contractorshallprovidealistofthetypesandsizesofliquidsthatwillbestored/handLedonsite.Contractorwiltalsoshowtheproposedlocationforstorageonaprojectsiteplanandwillprovideaproposedmethodofsecondarycontainment.TheOwner’sRepresentativeandtheCountyshallreviewandapprovetheplanpriortostorage.”2.Theproposedimprovementswillrequiredemolitionofasmallexistingbuilding.Anydemolishedmaterialwillberemovedimmediatelyupondemolition.Allpollutants,includingwastematerialsanddemolitiondebris,thatoccuronsiteshallbehandtedanddisposedofinamannerthatdoesnotcausecontaminationofstormwater.Goodhousekeepingandpreventativemeasureswittbetakentoensurethatthesitewillbekeptclean,well-organized,andfreeofdebris.AnoteisincltidedintheSWPPSnotesasfollows:“Constructionwasteshallbepromptlyremovedfromthesiteandshallnotbestockpiled.”3.Nostationarytankswiltbeusedforthisproject.AnoteisincludedintheSWPPSnotesasfollows:“Nostationaryfueltankshallbeallowed.”4.Ifrequired,amobilefueltruckwillbebroughttothesitetofueltheexcavationequipment.AnoteisincludedintheSWPPSnotesasfollows:“fuelingofconstructionequipmentshallbebyamobilefueltruckandshallbeallowedonlyinpavedareas.ContractorshallprovideaplanforfuelingareaspillcontainmenttotheOwner’sRepresentativeandCityofRentonwithaproposedmethodofsecondarycontainment.TheOwner’sRepresentativeandCityofRentonshalltreviewandapprovetheplanpriortofueling.Allspills,containment,andcleanupshallbethecontractor’sresponsibilityandattheirownexpense.”LPage2[ IATSOfficeExpansionRStormwaterPollutionPreventionandSpillPlanMay4,2015engIneenngplic5.Equipmentwillonlybefueledduringdaylighthours.AnoteisincludedintheSWPPSnotesasfollows:“fuelingofconstructionequipmentshallonlybeallowedduringdaylighthours.”6.Equipmentthatrequiressignificantrepairwillberemovedfromthesitetorepair.Minorrepairsormaintenancemaybeallowedonsiteonlyinanapprovedarea.Anoteisincludedinthe$WPPSnotesasfollows:“TheContractorshallremovefromthesiteallequipmentthatrequiressignificantrepair.Minorrepairsormaintenancemaybeallowedonsiteinanapprovedarea.TheContractorshallsubmitaplanfortheproposedlocationofvehiclemaintenanceandrepairandshallindicatetheproposedmethodofcontainmentforpossibleleakingvehiclefluids.ThecontractorshallalsoprovideaplantotheOwner’sRepresentativeandCityofRentonforthecollection,storage,anddisposalofthevehiclefluids.TheOwner’sRepresentativeandCityofRentonshallreviewandapproveplanpriortoanyon-sitemaintenance.”7.Truckwashoutwillnotbeallowedonsite.AnoteisincludedintheSWPPSnotesasfoltows:“TruckwashoutshaLlnotbeallowedonsite.TheContractorshallprovidetruckwashoutoff-siteatanapprovedandlegallocation.”8.Nochemicalsareanticipatedtoberequiredforthisproject.9.SelectedContractorshallprovidelocationforspillresponsematerials,andidentifydisposalmethodsforcontaminatedwaterandsoil.AnoteisincludedintheSWPPSnotesasfollows:“ContractorshallprovidetotheOwner’sRepresentativeandCityofRentonthelocationofspillresponsematerials.Contractorwitlalsoidentifydisposalmethodsforcontaminatedwaterandsoilafteraspill.”PARTC:POLLUTIONPREVENTIONREPORTTheprojectwillbebidthusnoexcavationcontractoriscurrentlyundercontract.Thepossiblesourcesofpollutionarelimitedandareaddressedabove.Inadditiontotheaboveinformationprovidedonthecontractdocuments,thefollowingnotesareincludedtospecificallyaddresspollutionprevention:•“TheContractorshallprovideareporttotheOwner’sRepresentativeandCityofRentonidentifyingthepersonnelresponsibleforpollutionprevention,includingcontactinformation,andclearlylistingtheresponsibilitiesofthesepersonnel.”•“TheContractorshallalsoprovideadescriptionoftheprocedurestobeusedinmonitoringthepollutionpreventionRMPsandrespondingtoaBMPthatneedsattention,includingrecordkeeping.”PARTD:SPILLPREVENTIONANDCLEANUPREPORTDuetothepublicbidprocess,anearthworksubcontractorisnotyetundercontractforthisproject.ThepersonnelresponsibleforspillpreventionandcleanupwiLtbeidentifiedatthepre-constructionmeetingfortheproject.Spillpreventionisaddressedwithnotesonthecontractdocumentsasstatedabove.ThesourcesofpotentialspillsarelimitedandPage3 tATSOfficeExpansionIStormwaterPollutionPreventionandSpillPlan[engineeringplichavebeenaddressedontheplanwithnotes.Inadditiontotheaboveinformationfprovidedonthecontractdocuments,thefollowingnoteshavebeenaddedintheSWPPSnotestospecificallyaddressspillprevention:•“TheContractorshallprovideareporttotheOwner’sRepresentativeandCityofRentonidentifyingthepersonnelresponsibleforspillprevention,includingcontactinformation,andclearLylistingtheresponsibilitiesofthesepersonnel.”•“TheContractorshallprovideadescriptionoftheprocedurestobeusedinmonitoringthespillpreventionBMPsandrespondingtoaspillincident,includingrecordkeeping.”[[C[CC[CCC________•LPage4C A15OfficeExpansionI)PreliminaryConstructionSWPPPNarrativeMay4,1015engineeringplIcATSOFFICEEXPANSIONPRELIMINARYCONSTRUCTIONSWPPPNARRATIVEMAY4,2015ThefollowingPreliminaryConstructionStormWaterPollutionPreventionPlan(SWPPP)NarrativefortheATSAutomationprojectat432ShattuckAvenueSinRentonsupplementstheTemporaryErosionandSedimentControldrawings.ThisnarrativeandthedrawingsaddresstherequirementsofSection3.3ofVolumeIIofthe2012WashingtonStateDepartmentofEcology(DOE)StormwaterManagementManualforWesternWashington.I.CONSTRUCTIONSTORMWATERPOLLUTIONPREVENTIONELEMENTS1)MarkClearingLimits:Clearinglimitswillbedefinedbyerosioncontrolcomponents,and/orconstructionfencing,asshownontheTESCandSiteDemolitionplan.Theactuallimitsofclearingwillmostlikelybesmallerthanthelimitofworkarea,butthisidentifiesthemaximumextentoftheclearinglimits.AreasimpactedandnotanticipatedtobecoveredwithfinalmeasuresshallbestabilizedusingapprovedESCmethods.2)EstablishConstructionAccess:Atemporaryconstructionaccess(BMPC105)willbeinstalledpriortoconstruction.ThequarryspallstabilizedconstructionentrancewillextendoffShattuckAvenueSinthenorthportionoftheprojectarea.TheContractorshallprovidewheelwashifnecessary.3)ControlflowRates:Stormwaterflowcontrolduringconstructionisanticipatedtobemitigatedbyroutingrunofftotheproposedwetvault,whichistobeutilizedasatemporarysedimentstoragefacility.RefertotheSedimentSizingcalculationsandtheKingCountyRunoffTimeSeries(KCRTS)outputincludedwithinAppendixBoftheproject’sStormwaterTechnicalInformationReport.4)InstallSedimentControls:DOEapprovedBMPsforsedimentcontrolsareshownontheTESCplan.Sedimentwillbecontrolledusingtriangularsiltdike(BMPC208),stormdraininletprotection(BMPC220),treeprotectionfencing,andtheproposedsedimentsettlingfacility.5)StabilizeSoils:Itispossiblethatsomeoftheearthworkandgradingmayoccurinwetweatherconditions.ThesitemustbestabilizedandnosoilswillbeallowedtoremainunstabilizedformorethantwodaysbetweenOctober15tandApril30thfromMayIthroughSeptember30,installcovermeasurestoprotectdisttirbedareasthatwillremainunworkedforsevendaysormore.ByOctober8,seedallareasthatwillremainunworkedfromOctober1throughApril30.Mulchallseededareas.ExposedslopeswillbeprotectedbyDOE-approvedcoveragemethods.BMPsincluding,butnotlimitedto:ClOl,PreservingNaturalVegetation;Cl21,Mulching;Cl23,PlasticCovering;C130,SurfaceRoughening;C140,DustControl;andT5.13PostConstructionSoilAmendmentwillbeusedtostabilizeon-sitesoilsduringconstruction.6)ProtectSlopes:DOE-approvedBMPsforslopeprotectionwillbeutilizedduringconstruction.Concentrateddischargesshallnotbeallowedtoflowoverthetopofsteepslopes.BMPsincluding,butnotlimitedtoC101,PreservingNaturalVegetation;Cl21,Mulching;C123,PlasticCovering;C130,SurfaceRoughening;Cl40,DustControl;PageI [ATSOfficeExpansionRPreliminaryConstruction5WPPPNarrativet’Hay4,2015LengmeeringplicC200,InterceptorDikeandSwale;C207,CheckDarns;andC233,SiltFencearetobetutilizedtoprotectslopesduringconstruction.7)ProtectDrainInlets:Drainagestructuresinareaswherenoworkoccurswillremainandwillbeprotected;dischargepointstothepublicstormdrainmainlinewillalsobeprotected.Topreventdischargeofturbidwaterdownstream,allexistingcatchbasinslocatedwithinthedisturbanceareaandoutsideofthedisturbanceareawithinapproximately300feetdownstreamofthesitewillbeprotectedwithstormdraininletprotection(BMPC220).Proposedinletswillalsobeprotectedwithcatchbasininserts,andwherefeasible,theiroutletswillbetemporarilypluggeduntilthesiteisstabilized.TheContractorshallremoveinletprotectionattheendoftheprojectwithoutreleasingcapturedsedimentintothestormsystem.8)StabilizeChannelsandOutlets:Thisprojectisnotexpectedtoinvolveanychannelsoroutlets.Ifnecessary,DOE-approvedBMPsforchannelstabilizationwillbeutilizedduringconstruction,including,butnotlimitedto:C200,tnterceptorDikeandSwale;andC207,CheckDams.9)ControlPollutants:Temporaryprotectionofthedisturbedsoilsprovidesthefirstlevelofprotectionforpollutioncontrol,andperimetermeasuresdownstreamwillmitigatetheremainingpollutants.Thetemporaryprotectionofdisttirbedsoilsmaybemitigatedwithatemporarysumpandpumpfacilitytoprovidethesecondlevelofinterceptionofpollutants.Thiscollectionsystemfilterssedimentspriortothepumpsystem.Thepumpsystemwillthenroutestormwaterviaforcemainsintotheproposedwetvaulttobetttilizedasasedimentfacility.Thesedimentsettlingtankmustprovideatleast4,400gallonsofstorage,andwillbelocatednorthoftheproposedwarehouseaddition.Thewetvaultdoeshaveadequatecapacitytoprovidetheneededstorage.Constructiondebriswillberemovedfromthesite.ContractorwillberesponsibleformanagingtheirconstructionequipmentperDOE-approvedBMPs.Thestabilizedconstructionentranceisassumedtobesufficientfortheconstructionperiod.Ifsomethingmoresubstantialisrequired,theContractoristocoordinatewiththeOwner’sRepresentativeandtheCityofRentoninspector.Ifatruckwheelwashisrequired,truckwheelwashwaterandconcretetruckwashoutwatershallbecollectedanddischargedtothepublicsanitarysewer(SS)system.ToapplyforSSrelease,contactthelocalsewerpurveyorforauthorization.Forinformationregardingspillcontrol,refertotheStorrnwaterPollutionPreventionandSpillPlan(SWPPS)plan/narrative,attached.10)ControlDc-Watering:Themajorityoftheearthworkontheprojectwillbeconstructeddtiringthedryseason,thereforeitisnotanticipatedthatgroundwaterwillbeencounteredintheexcavationsforthisproject.Intheeventthatperchedgroundwaterisencounteredditringanywetseasonconstruction,theContractorshaltrouteittothesedimentsettlingfacilitybypumpingitoutoftheexcavation.11)MaintainBMPs:DOE-approvedstandardBMPmaintenancewillberequiredinaccordancewiththestandardKingCountyTemporaryErosionandSedimentationControlPlanandNotes.[12)ManagetheProject:AllphasesofconstructionwillbemanagedbytheContractor.ThesitemustbestabilizedandnosoilswillbeallowedtoremainexposedandunworkedformorethantwodaysbetweenOctober1’andApril30thandformorethansevendaysbetweenMaylandSeptember30thTheContractorwillprovidemaintenanceandtPage2[ ATSOfficeExpansionPreliminaryConstructionSWPPPNarrativeMay4,2015engineeringpIcmonitoringofTESCBMPs.Workofallcontractorswillbecoordinatedtominimizethedurationofdisturbanceonthesite.ThebestmanagementpracticesshownontheTESCplanareminimumrequirements.FailuretomaintainSWPPPmeasuresinaccordancewithadoptedstandardsmayresultintheworkbeingperformedattheCounty’sdirectionandthecostsassessedasalienagainstthepropertywheresuchfacilitiesarelocated.13)ProtectLowImpactDevelopmentBMPs:TheContractormustcontrolerosionandavoidintroducingsedimentfromsurroundinglandusesontothepermeablepavementonthepatiossouthwestandsoutheastofthebuildingaddition.Pavementsexperiencingsedimentissuesornolongerpassinganinitialinfiltrationtestsmustbecleanedusingproceduresfromthelocalstormwatermanualorthemanufacturer’sprocedures.2.PROJECTDESCRIPTIONProposedimprovementsincludeanewwarehouse/officebuilding,constructedoffthenorthsideoftheexistingATSAutomationbuilding.TheexistingcommercialbuildingdirectlynorthoftheexistingATSbuildingwillbedemolished.Apavedparkinglotwillbeestablishedalongthenorthandeastsidesofthebuildingexpansion,includingaheavydutyasphaltdrivinglanetoaccommodatetrucktraffic.AccessimprovementswillbemadetoensureADAcompliance.Theareaofthesiteparcel(#7841300175)isabout0.95acres.Theprojectproposes13,616squarefeet(SF)ofnewplusreplacedimperviousarea.TheprojectislocatedwithinaPeakRateFlowControlStandardAreaasdesignatedbytheCityofRenton.Therewillbenoflowcontrolfacilitiesfortheproject;permeablepayerswillbeinstalledasaflowcontrolBestManagementPractice(BMP).EnhancedBasicWaterQualityTreatmentisrequiredandwillbeaddressedwithatwo-facilitytreatmenttrain,consistingofawetvaultfollowedbyaStormFilterstructurewithleafcompost(CSF)media.Seetheproject’stechnicalinformationreportformoreonthestormwaterimprovements.3.ExisTiNcSITECONDITIONSTheexistingprojectareaconsistsofasmallcommercialbuilding,withlimitedpavedparkingandagravelparkingarea.TheexistingbuildingisseparatedfromthemainATSbuildingbyadrivelaneandparking.StormwaterrunoffgenerallysheetflowsoffthesiteandenterstheexistingstormsystemwithinShattuckAvenue.ThesiteislocatedwithintheBlackRiverDrainageBasin.Theexistingtopographywithintheprojectareaisrelativelyflat,withslopesofaround0-2%throughouttheprojectdisturbancelimits.4.ADJACENTAREASTheprojectareaisboundedbyShattuckAveStothewest,apublicalleytotheeast,asinglefamilyresidencetothenorth,andtheexistingATSbuildingtothesouth.Page3 LiIATSOfficeExpansionIPreliminaryConstructionSWPPPNarrativeMay4,1015engineerin9plic5.CRITICALAREAS[1ThesiteislocatedwithintheCedarValleySoleSourceAqLtifer.BasedonCityofRentonGISandmapping,theredonotappeartobeanyotherenvironmentallysensitiveareaswithinorinpcloseproximitytothesite.U6.SoILSAccordingtotheUSDANaturalResourcesConservationService,thesitesoilsaremappedasUrbanLand.TheSCSSoilTypeisrecognizedasRenton(RE),classifiedundertheHydrologicSoilGroupDandisdefinedasTillintheproject’sstormwatercalculations(Table3.2.2.5,2009KCSWDM).AGeotechnicalEngineeringReporthasbeenpreparedbyPanGeo,Inc.datedDecember23,2014;acopyhasofbeenprovidedinAppendixEofthetechnicalinformationreport.Basedupontheexplorationpits,theunderlyingsoilsweregenerallydescribedassiltyclays.Groundwaterwasencounteredatadepthofabout8feet.7.POTENTIALEROSIONPROBLEMAREASPertheproposedcontractdocuments,thecontractoristoprovideprotectionforsoilstolimittheexposuretoerosion.Thelimitationofdisturbance,adequatecoverpractices,andrunoffcontrolarethemosteffectivemethodsforreductionofturbidityinstormwaterrunoff.Anyrunoffthatdoesoccurwillbedirectedtoatemporarysumpandthenpumpedtothesedimentsettlingfacility.AreasthathavenotbeenpermanentlystabilizedwillbeaddressedusingDOE-approvedLBMPs,pertheconstructiondocuments.8.CONSTRUCTIONPHASING[Atthistimeitisnotexpectedthattheprojectwillbeformallyphased.Thecontractorisresponsibleforcoordinatingworkofallstibcontractorstokeepthedurationofsitedisturbancelimitedtothemaximumextentpossible.9.CONSTRUCTIONSCHEDULEConstructionofprojectisexpectedtobegininJLIIy2015andbecompletedbyMarch2016.I0.FINANCIALIOWNERSHIPRESPONSIBILITIESThepropertyisprivatelyowned.Financialguaranteesandliabilityfortheproposedprojectwillbecompletedbyownerpriortopermitissuance.II.ENGINEERINGCALCULATIONSAcopyofanycalculationsperformedduringdesignoftheprojectandrelevantstormdrainagemodelingdisctissionsisincludedintheproject’sStorrnwaterTechnicalInformationReport.12.CERTIFIEDEROSIONCONTROLSPECIALISTThecontractorwillnametheirCertifiedErosionControlSpecialistandprovidecontactinformationatthepre-constructionmeeting.tPage4C HIengineeringpIIcAPPENDIXDOperationanc4MaintenanceGuidelinesp4 APPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESNO.5—CATCHBASINSANDMANHOLESMaintenanceDefectorProblemConditionWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceisPerformedStructureSedimentSedimentexceeds60%ofthedepthfromtheSumpofcatchbasincontainsnobottomofthecatchbasintotheinvertofthesediment.lowestpipeintooroutofthecatchbasinoriswithin6inchesoftheinvertofthelowestpipeintooroutofthecatchbasin.TrashanddebrisTrashordebrisofmorethan1/2cubicfootwhichNoTrashordebrisblockingorislocatedimmediatelyinfrontofthecatchbasinpotentiallyblockingentrancetoopeningorisblockingcapacityofthecatchbasincatchbasin.bymorethan10%.TrashordebrisinthecatchbasinthatexceedsNotrashordebrisinthecatchbasin.1/3thedepthfromthebottomofbasintoinvertthelowestpipeintooroutofthebasin.DeadanimalsorvegetationthatcouldgenerateNodeadanimalsorvegetationodorsthatcouldcausecomplaintsordangerouspresentwithincatchbasin.gases(e.g.,methane).Depositsofgarbageexceeding1cubicfootinNoconditionpresentwhichwouldvolume,attractorsupportthebreedingofinsectsorrodents.DamagetoframeCornerofframeextendsmorethan¾inchpastFrameisevenwithcurb.and/ortopslabcurbfaceintothestreet(Ifapplicable).Topslabhasholeslargerthan2squareinchesorTopslabisfreeofholesandcracks.crackswiderthan¾inch.Framenotsittingflushontopslab,i.e.,Frameissittingflushontopslab.separationofmorethan¾inchoftheframefromthetopslab.CracksinwallsorCrackswiderthan1/2inchandlongerthan3feet,Catchbasinissealedandbottomanyevidenceofsoilparticlesenteringcatchstructurallysound.basinthroughcracks,ormaintenancepersonjudgesthatcatchbasinisunsound.CrackswiderthanYzinchandlongerthan1footNocracksmorethan1/4inchwideatatthejointofanyinlet/outletpipeoranyevidencethejointofinlet/outletpipe.ofsoilparticlesenteringcatchbasinthroughcracks.SettlemenUCatchbasinhassettledmorethan1inchorhasBasinreplacedorrepairedtodesignmisalignmentrotatedmorethan2inchesoutofalignment,standards.DamagedpipejointsCrackswiderthan¾-inchatthejointoftheNocracksmorethan¼-inchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointofinlet/outletpipes.thecatchbasinatthejointoftheinlet/outletpipes.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.Inlet/OutletPipeSedimentSedimentfilling20%ormoreofthepipe.Inlet/outletpipesclearofsediment.accumulationTrashanddebrisTrashanddebrisaccumulatedininlet/outletNotrashordebrisinpipes.pipes(includesfloatablesandnon-floatables).DamagedCrackswiderthan¾-inchatthejointoftheNocracksmorethan¼-inchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointoftheinlet/outletpipe.atthejointsoftheinlet/outletpipes.2009SurfaceWaterDesignManual—AppendixA1/9/2009A-9 APPENDIXAMAINTENANCEREQUIREMENTSFLOWCONTROL,CONVEYANCE,ANDWQFACILITIES[1NO.5-CATCHBASINSANDMANHOLESMaintenanceDefectorProblemConditionWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceisPerformedMetalGratesUnsafegrateopeningGratewithopeningwiderthani8inch.Grateopeningmeetsdesign(CatchBasins)standards.TrashanddebrisTrashanddebristhatisblockingmorethan20%Gratefreeoftrashanddebris.ofgratesurface.footnotetoguidelinesfordisposalDamagedormissingGratemissingorbrokenmember(s)ofthegrate.GrateisinplaceandmeetsdesignAnyopenstructurerequiresurgentstandards.maintenance.ManholeCover/LidCover/lidnotinplaceCover/lidismissingoronlypartiallyinplace.Cover/lidprotectsopeningtoAnyopenstructurerequiresurgentstructure.maintenance.LockingmechanismMechanismcannotbeopenedbyoneMechanismopenswithpropertools.NotWorkingmaintenancepersonwithpropertools.Boltscannotbeseated.Self-lockingcover/liddoesnotwork.Cover/liddifficulttoOnemaintenancepersoncannotremoveCover/lidcanberemovedandRemovecover/lidafterapplying80lbs.oflift,reinstalledbyonemaintenanceperson.1/9/20092009SurfaceWaterDesignManual—AppendixAA-i0ppElElrCCElCElCElCCC[LC APPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESNO.6-CONVEYANCEPIPESANDDITCHESMaintenanceDefectorProblemConditionsWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceisPerformedPipesSediment&debrisAccumulatedsedimentordebristhatexceedsWaterflowsfreelythroughpipes.accumulation20%ofthediameterofthepipe.Vegetation/rootsVegetation/rootsthatreducefreemovementofWaterflowsfreelythroughpipes.waterthroughpipes.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.DamagetoprotectiveProtectivecoatingisdamaged;rustorcorrosionPiperepairedorreplaced.coatingorcorrosionisweakeningthestwcturalintegrityofanypartofpipe.DamagedAnydentthatdecreasesthecrosssectionareaofPiperepairedorreplaced.pipebymorethan20%orisdeterminedtohaveweakenedstructuralintegrityofthepipe.DitchesTrashanddebrisTrashanddebrisexceeds1cubicfootper1,000Trashanddebrisclearedfromsquarefeetofditchandslopes,ditches.SedimentAccumulatedsedimentthatexceeds20%oftheDitchcleaned/flushedofallsedimentaccumulationdesigndepth.anddebrissothatitmatchesdesign.NoxiousweedsAnynoxiousornuisancevegetationwhichmayNoxiousandnuisancevegetationconstituteahazardtoCountypersonnelortheremovedaccordingtoapplicablepublic,regulations.NodangerofnoxiousvegetationwhereCountypersonnelorthepublicmightnormallybe.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.VegetationVegetationthatreducesfreemovementofwaterWaterflowsfreelythroughditches.throughditches.ErosiondamagetoAnyerosionobservedonaditchslope.Slopesarenoteroding.slopesRockliningoutofOnelayerorlessofrockexistsabovenativesoilReplacerockstodesignstandards.placeormissing(Ifarea5squarefeetormore,anyexposednativeApplicable)soil.2009SurfaceWaterDesignManual—AppendixA1/9/2009A-ll APPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESNO.17—WETVAULTMaintenanceDefectorProblemConditionWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceisPerformedSiteTrashanddebrisTrashanddebrisaccumulatedonfacilitysite.Trashanddebrisremovedfromfacilitysite.TreatmentAreaTrashanddebrisAnytrashanddebrisaccumulatedinvaultNotrashordebrisinvault.(includesfloatablesandnon-floatables).SedimentSedimentaccumulationinvaultbottomexceedsNosedimentinvault.accumulationthedepthofthesedimentzoneplus6inches.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.VaultStructureDamagetowall,Crackswiderthan%-inch,anyevidenceofsoilVaultissealedandstructurallyframe,bottom,and/orenteringthestructurethroughcracks,vaultdoessound.topslabnotretainwaterorqualifiedInspectionpersonneldeterminesthatthevaultisnotstructurallysound.BafflesdamagedBafflescorroding,cracking,warpingand/orRepairorreplacebafflesorwailstoshowingsignsoffailureorbafflecannotbespecifications.removed.VentilationVentilationareablockedorplugged.Noreductionofventilationareaexists.lnleUOutietPipeSedimentSedimentfilling20%ormoreofthepipe.lnleVoutletpipesclearofsediment.accumulationTrashanddebrisTrashanddebrisaccumulatedIninlet/outletNotrashordebrisInpipes.pipes(includestloatablesandnon-floatables).DamageCrackswiderthanYz-inchatthejointoftheNocracksmorethanY4-inchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointoftheinlet/outletpipe.atthejointsoftheinlet/outletpipes.GravityDraininoperablevalveValvewillnotopenandclose.Valveopensandclosesnormally.Valvewon’tsealValvedoesnotsealcompletely.Valvecomptetelysealsclosed.AccessManholeAccesscover/ltdAccesscover/lidcannotbeeasilyopenedbyoneAccesscover/lidcanbeopenedbydamagedordifficulttoperson.Corrosion/deformationofcover/lid,oneperson.openLockingmechanismMechanismcannotbeopenedbyoneMechanismopenswithpropertools.notworkingmaintenancepersonwithpropertools.Boltscannotbeseated.Self-lockingcover/liddoesnotwork.Cover/liddifficulttoOnemaintenancepersoncannotremoveCover/lidcanberemovedandremovecover/lidafterapplying80lbsoflift,reinstalledbyonemaintenanceperson.Accessdoors/plateLargeaccessdoorsnotflatand/oraccessDoorscloseflatandcoversaccesshasgaps,doesn’topeningnotcompletelycovered,openingcompletely.covercompletelyLiftingRingsmissing,LiftingringsnotcapableofliftingweightofdoorLiftingringssufficienttoliftorrustedorplate.removedoororplate.LadderrungsunsafeMissingrungs,misalignment,rust,orcracks.Laddermeetsdesignstandards.Allowsmaintenancepersonsafeaccess.[2009SurfaceWaterDesignManual—AppendixAA-231/9/2009 APPENT)D(AMAINTENANCEREQUIREMENTSFLOWCONTROL,CONVEYANCE,ANT)WQFACIliTIESNO.21—STORMFILTER(CARTRIDGETYPE)MaintenanceDefectorProblemConditionWhenMaintenanceisNeededResultsexpectedWhenComponentMaintenanceisPerformedSiteTrashanddebrisAnytrashordebriswhichImpairsthefunctionofTrashanddebrisremovedfromthefacility,facility.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpoflutionasoils,gasoline,concretesiurriesorpaint,accordingtoappitcabiereguiations.SourcecontroiBMPsimplementedif.appropriate.Nocontaminantspresentotherthanasurfaceoiifilm.LifecycleSystemhasnotbeeninspectedforthreeyears.Facihtyisre-inspectedandanyneededmaintenanceperformed.VaultTreatmentSedimentonvaultGreaterthan2inchesofsediment.Vaultisfreeofsediment.AreafloorSedimentontopofGreaterthan%inchofsediment.Vaultisfreeofsediment.cartridgesMultiplescumlinesThickormultiplescumlinesabovetopofCauseofpluggingcorrected,abovetopofcartridges.Probablyduetopluggedcanistersorcanistersreplacedifnecessary.cartridgesunderdrainmanifold.VaultStructureDamagetowall,Crackswiderthan%-inchandanyevidenceofVaultreplacedorrepairedtodesignFrame,Bottom,and/orsoilparticlesenteringthestructurethroughthespecifications.TopSlabcracks,orqualifiedinspectionpersonneldeterminesthevaultisnotstructurallysound.BafflesdamagedBafflescorroding,crackingwarping,andlorRepairorreplacebafflestoshowingsignsoffailureasdeterminedbyspecification.maintenance/inspectionperson.FilterMediaStandingwaterin9inchesorgreaterofstaticwaterinthevaultforNostandingwaterinvault24hoursvaultmorethan24hoursfollowingaraineventand/orafterarainevent.overflowoccursfrequently.Probablydueto•pluggedfiltermedia,underdrainoroutletpipe.ShortcircuitingFlowsdonotproperlyenterfiltercartridges.Flowsgothroughfiltermedia.UnderdrainsandSediment/debrisUnderdrainsorclean-outspartiallypluggedorUnderdrainsandclean-outsfreeofClean-Outsfilledwithsedimentand/ordebrIs.sedimentanddebris.Inlet/OutletPipeSedimentSedimentfilling20%ormoreofthepipe.Inlet/outletpipesclearofsediment.accumulationTrashanddebrisTrashanddebrisaccumulatedinInlet/outletNotrashordebrisinpipes.pipes(includesfloatablesandnon-floatables).DamagedCrackswiderthan%-inchatthejointoftheNocracksmorethan‘/4-Inchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointoftheInlet/outletpipe.atthejointsoftheinlet/outletpipes.AccessManholeCoverllidnotinplaceCover/lidismissingoronlypartiallyinplace.Manholeaccesscovered.Anyopenmanholerequiresimmediatemaintenance.LockingmechanismMechanismcannotbeopenedbyoneMechanismopenswithpropertools.notworkingmaintenancepersonwithpropertools.Boltscannotbeseated.SeIf-tockingcover/liddoesnotwork.Cover/liddifficulttoOnemaintenancepersoncannotremoveCover/lidcanberemovedandremovecover/lidafterapplying80lbsoflift,reinstalledbyonemaintenanceperson.LadderrungsunsafeMissingrungs,misalignment,rust,orcracks.Laddermeetsdesignstandards.Allowsmaintenancepersonsafeaccess.LargeaccessDamagedordifficultLargeaccessdoorsorplatescannotbeReplaceorrepairaccessdoorsoitdoors/platetoopenopened/removedusingnormalequipment.canopenedasdesigned.1/9/20092009SurfaceWaterDesignManual—AppendixAA-30 APPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESNO.27—STORMFILTER(CARTRIDGETYPE)MaintenanceDefectorProblemConditionWhenMatntenanceIsNeededResultsExpectedWhenComponentMaintenanceisPerformedGaps,doesn’tcoverLargeaccessdoorsnotflatandloraccessDoorscloseflatandcovetaccesscompletelyopeningnotcompletelycovered,openingcompletely.LiftingRingsmissing,LiftingringsnotcapableofliftingweightofdoorLiftingringssufficienttoliftorrustedorplate,removedoororplate.rttF:tCCtCCC2009SurfaceWaterDesignManual—AppendixAA-3I1/9/2009 uiengineeringpIcAPPENDIXEGeotechnicalReport PanGEe-E-—INC0RP0RATED3213EastlakeAvenueESuiteB,Seattle,WA98102T.206.262.0370F.206.262.0374GEOTECHNICALENGINEERINGREPORTATSWAREHOUSE432ShattuckAvenueSouthRenton,WashingtonPROJECTNO.14-269December23,2014---—I0Itrt,,ALpPreparedfor:ATSAutomationGeotochnical&EarEnee1 tPanGEE•NCORPORATDGeotechnical&EarthquakeEngineeringConsultantsDecember23,2014FileNo.14-269Mr.BrianAllenATSAutomation450ShattuckAveS.Renton,WA98057Re:GeotechnicalEngineeringReportATSWarehouse432ShattuckAvenueSouthRenton,Washington[DearMr.Allen,Enclosedisourgeotechnicalreportforthedesignofthefoundationsforthenew2to3[storywarehousethatwillbeconstructedimmediatelynorthoftheATSmainbuilding.Weanticipatethatcolumnloadsforthewarehousemaybeontheorderof100kips.Thesiteofthewarehouseisunderlainbymoderatelycompressiblesoilsaswellassoilsthatmaybesusceptibletoliquefactioninastrongearthquake.Assuch,useofconventionalspreadfootingfoundationswithoutgroundimprovementmayresultinbuildingsettlementsontheorderof3to4inchesunderstaticloadingandanadditionalIto2inchesunderseismicloading.Useofapreloadwillreducestaticsettlementstoabout1inchbutdynamicsettlementswillbeunaffected.UseofgrounddensificationfromGeopiersorstonecolumnsextendingtoadepthofabout25feetwilllikelyreducestaticanddynamicsettlementstoabout1inch.Alternatively,18”diameteraugercastpilefoundationsinstalledtoadepthofabout53feettosupportboththestructureandfloorstabwiltlikelyreducesettlementstoaboutV2inch.Shorteraugercastpiles(i.e.about25feetlong)withalowerdesigncapacitymayatsobeusedwithexpected[setttementsontheorderof1inch.Sincerely,[W.PaulGrant,P.E.[PrincipalEnclosure:GeotechnicalReport[__________________[3213EastlakeAvenueEastSuiteBSeattle.WA98102-7127Tel:(206)262-0370fax:(206)262-0374t TABLEOFCONTENTS1.0INTRODUCTION11.1SITEANDPROJECTDESCRIPTION1.2SCOPEOfWORKANDAUTHORIZATION12.0SITERECONNAISSANCE13.0SUBSURFACECONDITIONS23.IS0ILs23.2GROUNDWATER34.0CONCLUSIONSANDRECOMMENDATIONS34.1SEISMICDESIGNPARAMETERS34.2LIQUEFACTION44.3PRELOADFILL44.4SPREADFOoTINGFOUNDATIONS44.5GROUNDIMPROVEMENT54.6AUGERCASTPILEFOUNDATIONs64.7STRUCTURALFILLANDCOMPACTION74.8FLOORSLABS74.9STORMWATERINFILTRATION74.10PAVEMENT75.0CONSTRUCTIONCONSIDERATIONS$5.1MATERIALREUSE85.2SURFACEDRAINAGEANDEROSIONCONSIDERATIONS85.3WETWEATHEREARTHWORK86.0CONSTRUCTIONSUPPORTSERVICES97.0LIMITATIONS10REFERENCES1214-269ATSWarehouseRpt.docjPanGEO,Inc. ciciLISTOfFIGURESANDAPPENDIX(FOLLOWINGTEXT)figure1VicinityMapfigure2SiteandExplorationPlanfigure3GeneralizedSubsurfaceProfileSectionA-A’figure4LateralPileCapacity,18-inchAugercastPile,40kipLateralLoad—Staticfigure5LateralPileCapacity,18-inchAugercastPile,IIkipLateralLoad-SeismicLISTOFAPPENDICESAppendixASummaryExplorationLogsfigureA-ITermsandSymbolsforBoringandTestPitLogsfigureA-2LogofTestBoringBH-1FigureA-3ConePenetrationTestLogCPT-1figureA-4ConePenetrationTestLogCPT-2figureA-5ConePenetrationTestLogCPT-3figureA-6ConePenetrationTestLogCPT-4CC[[[C14-269ATSWarehouseRpt.docPanGEO,Inc.C GEOTECHNICALENGINEERINGREPORTATSWAREHOUSE432SHATTUCKAVENUESOUTHRENTON,WASHINGTON1.0INTRODUCTIONPanGEO,Inc.(PanGEO)completedageotechnicalengineeringstudytoprovidefoundationdesignparametersforthenewATSwarehouseinRenton.Thestudyincludedevaluatingthesubsurfaceconditionsatthesiteandprovidingfoundationrecommendationsfordifferentsupportalternativesforthenewwarehouse.Thefollowingsummarizesourfindingsandconclusions.1.1SJTEANDPROJECTDESCRIPTIONThesiteofnewwarehouseencompassesthetwoparcelsat428and432ShattuckAvenueSouthasshownonFigure1.CurrentdevelopmentontheparceLsincludesasinglestorycommercialbuildingonthesouththatwillbedemolishedforthenewconstructionandagraveledparkinglotonthenorth.Thegroundsurfaceonthecombinedpropertiesisrelativelylevelataboutelevation30feet.AsshownonFigure2,the2to3storywarehousewillhavealengthof90feetandawidthof40feet.Atruckdrivelaneandaloadingdockwillbelocatedonthenorthsideofthebuilding.Weanticipatethatthemainfloorofthewarehousewillbeelevatedabout3to4feetabovetheexistinggradetofacilitatemovementontheloadingdock.Wealsoanticipatethatcolumnloadsfromthenewstructuremaybeontheorderof100kips1.2SCOPEOFWORKANDAUTHORIZATIONOurworkwasaccomplishedinaccordancewithourproposalletterdatedOctober7,2014,whichwasauthorizedbyMr.BrianAllenwithATSAutomationOctober15thOurworkscopeincludedreviewingexistinggeotechnicaldataforthesiteandadvancingtwoconepenetrometertest(CPT)probestoexploresubsurfaceconditionsatthesiteofthewarehousefromwhichwederiveddesignrecommendationsasdiscussedinthisreport.2.0SITERECONNAISSANCEOnNovember25,2014,weconductedasitereconnaissancetoidentifyindicationsofdifferentialsettlementofexistingbuildingsinthevicinityofthesite.Duringourvisitweobservedabout2to3inchesofdifferentialsettlementofawoodframedgarageimmediatelynorthofthe42$parcelandabout1inchofdifferentialsettlementintheexistingsinglestorycommercialbuildingonthe432parcel.Bothstructuresareassumedtobesupportedonshallowspreadfootingfoundations.Theobservedsettlementconfirmsthepresenceofcompressiblesoilsunderlyingthewarehousesite. CC3.0SUBSURFACECONDITIONS3.1SoiLsCSubsurfaceconditionsatthesitewereinferredfromthelogsoftwonewCPTprobes(CPT-3andCPT-4)advancedatthesiteofthewarehouseandthreepreviousexplorationsthatwereadvancedadjacenttotheATSbuilding.ThelocationsofthecurrentandpriorexplorationsareshownonFigure2.[WiththeexceptionofCPT-3thatencounteredrefusalatadepthofabout24feet,theremaining3CPTexplorationswereadvancedtoadepthofabout52feetwhereeachprobeencounteredrefusal.BoringBH-1fromourpriorworkwasadvancedtoamaximumdepthofabout78.5feet.Consistentsubsurfaceconditionsweregenerallyencounteredinallexplorationsasreflectedinabout48feetofalluviumwithzonesofsoftcompressiblesoilandpotentiallyliquefiablesoiloverlyingdensetoverydensebedload(i.e.sandandgravel)alluvialoroutwashdeposits.However,thewarehouseexplorations(CPT-3andCPT-4)aswellasCPT-2locatedsouthofthewarehousesiteallencounteredadensetoverydenseupperbedloaddepositbetweendepthsofabout22and32feet.SubsurfaceconditionsatthewarehousesitearegraphicallydepictedinFigure3andlogsofallexplorationsarepresentedinAppendixA.Thefollowingdescribesthesoilsencounteredintheexplorations:UpperAllîtvium—Thematerialswithinabout48feetoftheexistinggroundsurfaceconsistofinterbeddedsands,siltsandclaysthatweredepositedinalowenergyenvironment.Sandswithintheupperalluviumaretypicallylooseandthesiltyclaysandclayeysiltsaretypicallysoft.TheCPTprobesindicatethattheupperalluviummayalsocontainsensitiveorcompressiblematerialssuchaspeat.UpperBedLocidAlluviumorOzttwash—Anupperstratumofbedloaddepositsconsistingofdensetoverydensesandandgravelwasencounteredbetweendepthsofabout22and32feetintheexplorationsatthewarehousesite.CPT-3encounteredrefusalinthisstratumadepthofabout25feetwhereasCPT-4wasabletoadvancethroughthisstratumandbackintounderlyingweakeralluvialdeposits.LowerBedloadAlluviumorOutwash—WiththeexceptionofCPT-3which[encounteredrefusalatashaLlowdepth,allremainingsiteexplorationsencounteredalowerbedloadalluvialoroutwashdepositatadepthofabout4$feet(El.-18ft.).Thisdepositconsistsofdensetoverydense,finetocoarsegrainedsandwithsomegravel.WhiletheCPTprobesencounteredrefusalinthisstratum,boringBH-lwasabLetopenetratethisstratumtoadepthof78.5,atwhichpointtheboringwasterminated.StandardPenetrationTestN-valuesinthisstratumtypicallyvariedbetween35and80bpf.14-269ATSWarehouseRpt.Uoc2PanGEO,Inc.C 3.2GROUNIWATERGroundwaterwasinferredatadepthabout8feetbasedontheporewaterpressuremeasurementsfromtheCPTprobes.However,groundwaterseepagemaybeencounteredclosertothegroundsurfaceasrelatedtotheinterbeddednatureofthenearsurfacesandsandsilts.4.0CONCLUSIONSANDRECOMMENDATIONSThesiteofthenewwarehouseisunderlainbycompressiblesoilsthatmaysettleseveralinchesundertheweightoftheanticipated3to4fillthatmaybeusedtoelevatethefloorslabofthebuildingtotheloadingdocklevel.Additionalsettlementmayalsooccurfromthehighcolumnloads(i.e.—100kips).Accordingly,groundimprovementmeasuresordeepfoundationswilllikelybeneededtoreducebuildingsettlementstoacceptablelevels.Asaminimum,werecommendsurchargingthebuildingwithatleast6feetofsoilextendingabovetheplannedelevationofthefirstfloorstabtoreducestaticsettlementstotolerablelevelstoallowthebuildingtobesupportedonconventionalspreadfootingfoundations.Thesurchargeload,however,wouldnotreduceearthquakeinducedsettlementsthatmaybeontheorderofIto2inches.Alternatively,groundimprovementconsistingorGeopiersorstonecolumnsmaybespecifiedtosupportthefloorslabsandfootingsofthebuilding.Theseinstallationsaretypicallycontractordesignedtosupportfootingbearingpressuresofabout4ksfandfloorslabloads.Theseelementswouldtypicallyterminateintheupperbedloadstratumatadepthofabout25feetandshouldprovidestaticsettlementsoflessthanabout1inchandadditionalsettlementofabout1inchasrelatedtopotentialliquefactioninthezoneofloweralluvium.Finally,theleastamountofbuildingsettlement(i.e.lessthan‘/2inch)maybeachievedwiththeuseofaugercastpilesextendingtothelowerbedloaddepositstosupportthebuildingshellandthefloorslabs.1$’diameteraugercastpilesextendingatleast5feetintotothelowerbedtoaddepositswouldhaveanallowablecompressionloadofabout120kips.Augercastpilesthatterminateintheupperbedloaddepositswouldhaveareducedallowablecompressioncapacityofabout100kipsandsettlementcharacteristicssimilartothoseofthestonecolumngroundimprovements.Detaileddesignrecommendationsarepresentedbelow.4.1SEISMICDESIGNPARAMETERSThefollowingprovidesseismicdesignparametersforthesitethatareinconformancewiththe2012InternationalBuildingCode(IBC),whichspecifiesadesignearthquakehavinga2%probabilityofoccurrencein50years(returnintervalof2,475years),andthe200$USGSseismichazardmaps:14-269ATSWarehouseRpt.doc3PanGEO,Inc. SpectralSpectralDesignControlAcceleratioAcceleratioSiteSpectralPeriodsSitenat0.2sec.nat1.0sec.CoefficientsResponse(sec.)Class(g)(g)ParametersS5SifaFSDSIStYoITsD1.440.541.01.50.960.540.110.564.2LIQUEFACTIONThelooseupperandloweralluvialsoilsunderlyingthesitecontainsomezonesofpotentiallyLiquefiablesoil.ThesezonesaretypicallythinanddiscontinuoussuchthatgroundsettlementsrelatedtopotentialliquefactionareexpectedtobeontheorderofIto2inches.Becauseofthedepthofthesezones(i.e.greaterthan10feet),anyliquefactionwithinthesematerialswouldonlyresultingroundsettlementwhichmaycausesomearchitecturaldamageandsomestructuraldistressofthebuildingbutnotafoundationfailure.4.3PRELOADFILLTheuseofconventionalshallowfootingstosupportthebuildingshouldbeprecededbyplacingastaticsurchargefillonthesitetoconsolidatetheunderlyingcompressiblesoils.Staticsettlementsmaybereducedtoabout1inchbyplacingapreloadfillthatextendsatleast6feetabovetheelevationofthefinishedfirstfloorslab.Thetopofthefillshouldextendatleast5feetbeyondtheperimeterofthebuilding.Thefillshouldbelefttoconsolidatetheunderlyingsoilsforatleast4weeks.Priortoplacingthefill,settlementmarkersshouldbeplacedonthegroundat4locationstoallowmonitoringtherateofgroundsettlement.Surveyreadingsshouldbeobtainedtwiceweeklydocumentingtheelevationsofthesurveymarkerstoconfirmthetimeatwhichthepreloadcanberemoved.Whileapreloadwillreducestaticsettlement,thebuildingmaystillexperienceabout1to2inchesofsettlementrelatedtopotentialliquefactionofsomeoftheloose,saturatedsandsthatunderliethesite.4.4SPREADFooTINGFOUNDATIONSfollowingtheplacementofthepreloadfill,conventionalspreadandstripfootingsmaybeconstructedtosupportthebuilding.Allfootingsshouldbefoundedaminimumdistanceof18inchesbelowthefinishedgradeandshouldhaveaminimumwidthof1$inches.BecauseitisquiteLikelythatthedesignfootinggradeswillbeLocatedoverrelativelyweakcohesivesoils,werecommendthatallfootingbeoverexcavatedtoa14-269ATSWarehouseRpt.doc4PanGEO,Inc.tCtCCCCcCCCCCC[CCCC tdepthof2feetandtheexcavatedmaterialreplacedwithacompactedstructuralfillwhichwillalsoserveasaworkingplatformforthefootingconstruction.AllfootingexcavationsshouldobservedbyPanGEOtoconfirmthattheexposedfootingsubgradeisconsistentwiththeexpectedconditionsandadequatetosupporttheproposedbuilding.Werecommendthatthefootingsbesizedusingamaximumallowablebearingpressureof2ksfwhichmaybeincreasedby1/3fortransientconditionssuchaswindandseismicloadings.Totalstaticsettlementsforthefootingsasconstructedasdescribedaboveandfollowingplacementofthesurchargefillareanticipatedtobeontheorderof1inchwithdifferentialsettlementsofabouthalfthisamount.Mostsettlementwilloccurduringconstructionasloadsareapplied.TotalbuildingsettlementsfollowingalargeearthquakeareexpectedtobeontheorderofIto2inches.Lateralforcesfromwindorseismicloadingmayberesistedbythecombinationofpassiveearthpressuresactingagainsttheembeddedportionsofthefoundationsandbyfrictionactingonthebaseofthefoundations.Passiveresistancevaluesmaybedeterminedusinganequivalentfluidweightof350poundspercubicfoot(pc.Thisvalueincludesafactorsafetyofatleast2assumingthattheproperlycompactedstructuralfillwillbeplacedadjacenttothesidesofthefootings.Acoefficientfrictionof0.5maybeusedtodeterminethefrictionalresistanceatthebaseofthefootings.Thiscoefficientincludesafactorsafetyofapproximate1.5.4.5GROUNDIMPROVEMENTInlieuofthesurchargefill,groundimprovementconsistingoftheinstallationofGeopiersorstonecolumnsthatterminateintheupperbedloadstratumatadepthofabout25feetmaybeconductedtosupportthefootingsandfloorslabsofthebuildings.Thistypeofgroundimprovementisacontractordesign-builtelementtomeetperformancespecificationsforsettlementandallowablefootingbearingpressure.ContractorscapableofconductingsuchworkincludeGeopierNorthwest,HaywardBaker,andMalcolmDrilling.Thesesystemsconsistofcompactingcolumnsofwell-gradedstonetoincreasethebearingcapacityofpoorsoils,mitigateliquefactionpotential,andreducesettlement.Indevelopingaperformancespecificationforthisworkwerecommendthatthegroundimprovementelementsbespecifiedasbeingcompatiblewithafootingallowablebearingpressureof4ksfandamaximumstaticbuildingsettlementof1inch.Again,becausethedesignwillnotimprovethesoilunderlyingtheupperbedloadstratum,thebuildingmayexperience1to2inchesofsettlementfollowingalargeearthquake.Theperformanceofconventionalfootingsmaybeimprovedbytyingtheindividualfootingstogetherwithconcretegradebeams.Theperformancespecificationmayincludeorexcludefloorslabsupportforthegroundimprovementelements.14-269ATSWarehouseRpt.doc5PanGEO,Inc. tFAlthoughliquefactioncouldoccurduringarareIBCcodelevelearthquakebelowthetreatedsoils,itisouropinionthatthiswiLlnotresultinabearingfailureofthebuildingfoundationduetotheimproveduppercrust.4.6AUGERCASTPILEFOUNDATIONS[Settlementmaybereducedtolessthan‘/2inchforbothstaticanddynamicloadingbysupportingthebuildingshellandfloorslabson18-inchdiameteraugercastpilesthatextendintothelowerbedloaddepositswhichwereencounteredataboutelevation-18feet.Auger-castpilesareinstalledbydrillingwithacontinuousflighthollowstemaugerto[therequireddepth,andpumpinggroutthroughthehollowstemoftheaugerastheaugeriswithdrawn.Aftertheaugeriscompletelyremoved,steelreinforcementisplacedinthegrout-filledhole.Therateatwhichtheaugeriswithdrawnmustbeconsistentwithgroutsupply.Iftheaugeriswithdrawntooquickly,thepilewillbeunder-grouted,resultingin“necking”ofthepileorcontaminationofgroutmaterialsfromcavingsoil.Werecommendthatthefollowingdesignparametersforsizingtheaugercastpiles:Minimumpilediameter:18-inchesMinimumpileembedmentindense5feet(120kippile)sand:10feet(200kippiLe)MinimumPileTipElevation:-23feet(120kippile)-28feet(200kippile)CompressiveCapacity(18”dia.):120kipsatl./240kipsult.(5’embed.)[200kipsall./400kipsult.(10’embed.)TensionCapacity(1$”dia.):70kipall./140kipsutt.(5’embed.)[140kipsall./280kipsult.(10’embed.)Theaugercastpilesshouldbespacedaminimumdistanceof3timesthepilediameter.[Lateralloadsactingonthebuildingwillberesistedbyacombinationofpassiveearthpressureactingonthepilecapsandgradebeamsaswellasfromthelateralresistanceoftheaugercastpiles.ThecomputerprogramALLPILEwasusedtoevaluatethelateralresistanceoftheaugercastpilesassumingafixedheadconditionatthepilecap.Theresultsoftheseanalysesarepresentedinfigures4and5.Theanalysespresentedinfigure4representthepilebehavioruptothepointwheretheunderlyingsoilsliquefyorexperiencesignificantdegradation.TheseconditionswouldLikelygovernformostoftheearthquakegroundshaking.Theanalysespresentedinfigure5reflectconditionsofdegradedorliquefiedsoil,whichmaybemorereflectiveofconditionsneartheendoftheearthquakeoraftercessationofstronggroundshaking.Bothanalyseswereconductedusinglateralloadsthatwouldresultinabout1/2inchofpiledeflection.Lowerapplied14-269ATSWarehouseRpt.doc6PanGEO,Inc. loadswouldgenerallyresultinproportionatelylowerdeflections.Becauseoftherelativelywidepilespacinginthenewaddition,groupeffectsarenotexpectedtocontrolpilecapacities.Asanalternativetothedeeperpiles,theaugercastpilesmaybedesignedtobearwithintheupperbedloaddepositsatadesigntipelevationof+3feet.Thesepileswouldhaveanallowablecompressioncapacityof100kipsandanallowabletensioncapacityof50kips.Augercastpilesbearingwithintheupperbedloaddepositswouldhavethesamesettlementcharacteristicsasthestonecolumngroundimprovementoption.4.7STRUCTURALFILLANDCOMPACTIONWerecommendusingallweathermaterialsuchasCityofSeattleMineralAggregateType17(2003CityofSeattleStandardSpecifications,9-03.12(3))orWSDOTGravelBorrow(9-03.14(1))forstructuralfill.Thebackfillshouldbemoistureconditionedtowithinabout3percentofoptimummoisturecontent,placedinloose,horizontalliftslessthan$inchesinthickness,andsystematicallycompactedtoadenseandrelativelyunyieldingconditionandtoatleast95percentofthemaximumdrydensity,asdeterminedusingtestmethodASTMD1557.4.8FLooRSLABSSlabongradefloors(i.e.floorsthatarenotstructurallysupported)shouldbeconstructedoversubgradethathasbeencompactedtoadenseandunyieldingcondition.Werecommenduseofamodulusofsubgradereactionof100pciforthefloorslabdesign.Allfloorslabsshouldbeconstructedonaminimum4-inchthickcapillarybreakconsistingoffree-draining,crushedrockorwell-gradedgravelcompactedtoafirmandunyieldingcondition.Thecapillarybreakmaterialshouldhavenomorethan10percentpassingtheNo.4sieveandlessthan5percentbyweightofthematerialpassingtheU.S.StandardNo.100sieve.CityofSeattleType22materialmeetsthisgradationrequirement.WealsorecommendthataI0-milpolyethylenevaporbarrierbeplacedbelowtheslab.4.9STORMWATERINFILTRATIONTheconepenetrometerprobessuggestthatpoordrainingcohesivesoils,suchassiltyclays,arethepredominantmaterialsthatunderliethesite.Consequently,werecommendthatanyinfiltrationschemebebasedonaconservativeinfiltrationrateofabout0.1to0.3inchesperhour.Anydesignsassuminggroundwaterinfiltrationshouldbeconfirmedwithadditionalsiteexplorations.4.10PAVEMENTWerecommendthatthepavementsectionforthetrucklanesconsistof4inchesofHMAoverlying9inchesofCrushedSurfacingBaseCourse(CSBC)(WSDOT9-03.09(3))over14-269ATSWarehouseRpt.doc7PanGEO,Inc. FFthecompactedsubgrade.Allmaterialswithinthepavementsectionshouldbecompactedto95%ofthematerialsmaximumdrydensity,asdeterminedusingtestmethodASTMD1557.Alesserpavementsectionconsistingof3inchesofHMAover6inchesofCSBCmaybeusedforautoparkinganddrivelanes.f5.0CONSTRUCTIONCONSIDERATIONS5.1MATERIALREUSENativeon-sitesoilswithsiltcontentsinexcessofabout5%maybedifficulttohandleandcompactduringwetweather.Ifuseoftheexistingsoilsisplanned,anyexcavatedsoilshouLdbestockpiledandprotectedwithplasticsheetingtopreventsofteningfromrainfatl.[5.2SURFACEDRAINAGEANDEROSIONCONSIDERATIONSSurfacerunoffcanbecontrolledduringconstructionbycarefulgradingpractices.Typically,thisincludestheconstructionofshallow,upgradeperimeterditchesorlowearthenbermstocollectrunoffandpreventwaterfromenteringexcavations.Temporaryerosioncontrolmayrequiretheuseofhaybalesonthedownhillsideoftheprojecttopreventwaterfromleavingthesiteandpotentialstormwaterdetentiontotrapsandandsiltbeforethewaterisdischargedtoasuitableoutlet.Allcollectedwatershouldbedirectedtoapermanentdischargesystemsuchasastormsewer.Itshouldbenotedthatthesitesoilsarepronetosurficialerosion.Specialcareshouldbetakentoavoidsurfacewateronopencutexcavations,andexposedslopesshouldbeprotectedwithvisqueen.Temporaryprovisionsmayalsoberequiredsuchastheuseofquarryspallsattheentrancetotheconstructionsitetoreducethepossibilityoftheoffsitetransportofsoilonthetrucktires.[Permanentcontrolofsurfacewaterandroofrunoffshouldbeincorporatedinthefinalgradingdesign.ALlcollectedrunoffshouldbedirectedintoconduitsthatcarrythewaterawayfromthepavementorstructureandintostormdrainsystemsorotherappropriateoutlets.Adequatesurfacegradientsshouldbeincorporatedintothegradingdesignsuchthatsurfacerunoffisdirectedawayfromstructures.[5.3WETWEATHEREARTHWORKGeneralrecommendationsrelativetoearthworkperformedinwetweatherorinwetconditionsarepresentedbelow:•Earthworkshouldbeperformedinsmallareastominimizesubgradeexposure[towetweather.ExcavationortheremovalofunsuitablesoilshouldbefoLlowedpromptLybytheplacementandcompactionofcleanstructuralfill.[14-269ATSWarehouseRpt.doc$PanGEO,Inc.[ Thesizeandtypeofconstructionequipmentusedmayhavetobelimitedtopreventsoildisturbance.•Duringwetweather,theallowablefinescontentofthestructuralfillshouldbereducedtonomorethan5percentbyweightbasedontheportionpassing3/4Winchsieve.Thefinesshouldbenon-plastic.•Thegroundsurfacewithintheconstructionareashouldbegradedtopromoterun-offofsurfacewaterandtopreventthepondingofwater.•Balesofstrawand/orgeotextilesiltfencesshouldbestrategicallylocatedtocontrolerosionandthemovementofsoil.Erosioncontrolmeasuresshouldbeinstalledalongallthepropertyboundaries.•Excavationslopesandsoilsstockpiledonsiteshouldalsobecoveredwithplasticsheets.6.0CONSTRUCTIONSUPPORTSERVICESTherecommendationspresentedinthisreportarebasedontheassumptionthatanadequateprogramoftestsandobservationswillbemadeduringconstructiontoverifycompliancewiththeserecommendations.Thesetestsandobservationsshouldinclude,bynotnecessarilybelimitedto,thefollowing:•Reviewfinalprojectplansandspecifications•Verifyimplementationoferosioncontrolmeasures•Monitorpile/groundimprovementinstallations•Verifyadequacyofslabandpavementsubgrade•Confirmtheadequacyofthecompactionofstructuralbackfill•OtherconsultationasmayberequiredduringconstructionPendingthecompletionofthefinaldesigndrawings,wewillprovideyouaproposalforconstructionmonitoringservicestoaddresstheaboveitems.Geotechnicalconstructionmonitoring,bythegeotechnicalengineerofrecord,mayberequiredbytheCityofRentontoobtainanoccupancypermitforthebuilding.WewiLlprovidetheservicesnecessarytoassureyoucompliancewiththeBuildingPermit.14-269ATSWarehouseRpt.doc9PanGEO,Inc. [[7.0LIMITATIONSWehavepreparedthisreportforusebytheconsultantteamforthedesignofthe[proposedwarehouse.Recommendationscontainedinthisreportarebasedonasitereconnaissance,asubsurfaceexplorationprogram,reviewofpertinentsubsurfaceinformation,andourunderstandingoftheproject.Thestudywasperformedusingamutuallyagreed-uponscopeofwork.Variationsinsubsurfaceconditionsmayexistbetweenthelocationsoftheexplorationsandtheactualconditionsunderlyingthesite.Thenatureandextentofsoilvariationsmaynotbeevidentuntilconstructionoccurs.Ifanysoilconditionsareencounteredatthesitethataredifferentfromthosedescribedinthisreport,weshouldbeimmediatelynotified[toreviewtheapplicabilityofourrecommendations.Additionally,weshouldalsobenotifiedtoreviewtheapplicabilityofourrecommendationsifthereareanychangesintleprojectscope.[Thescopeofourworkdoesnotincludeservicesrelatedtoconstructionsafetyprecautionsandourrecommendationsarenotintendedtodirectthecontractor’smethods,techniques,sequencesorprocedures,exceptasspecificallydescribedinourreportforconsiderationindesign.Additionally,thescopeofourworkspecificallyexcludestheassessmentofenvironmentalcharacteristics,particularlythoseinvolvinghazardous[substances.Thisreporthasbeenpreparedforplanninganddesignpurposesforspecificapplicationtotheproposedprojectinaccordancewiththegenerallyacceptedstandardsoflocalpracticeatthetimethisreportwaswritten.Nowarranty,expressorimplied,ismade.Thisreportmaybeusedonlybytheclientandforthepurposesstated,withina[reasonabletimefromitsissuance.Landuse,siteconditions(bothoffandon-site),orotherfactorsincludingadvancesinourunderstandingofappliedscience,maychangeovertimeandcouldmateriallyaffectourfindings.Therefore,thisreportshouldnotberelieduponafter24monthsfromitsissuance.PanGEOshouldbenotifiediftheprojectisdelayedbymorethan24monthsfromthedateofthisreportsothatwemayreviewtheapplicabilityofourconclusionsconsideringthetimelapse.itistheclient’sresponsibilitytoseethatallpartiestothisproject,includingthedesigner,contractor,subcontractors,etc.,aremadeawareofthisreportinitsentirety.Theuseof[informationcontainedinthisreportforbiddingpurposesshouldbedoneatthe[C[14-269ATSWarehouseRpt.doc10PanGEO,Inc.[ contractor’soptionandrisk.AnypartyotherthantheclientwhowishestousethisreportshallnotifyPanGEOofsuchintendeduseandforpermissiontocopythisreport.Basedontheintendeduseofthereport,PanGEOmayrequirethatadditionalworkbeperformedandthatanupdatedreportbereissued.NoncompliancewithanyoftheserequirementswillreleasePanGEOfromanyliabilityresultingfromtheusethisreport.W.PaulGrant,P.E.PrincipalGeotechnicalEngineer14-269ATSWarehouseRpt.doc11PanGEO,Inc. LREFERENCESInternationalBuildingCode(IBC),2012,InternationalCodeCouncilWSDOT,2012,StandardSpecificationsforRoad,Bridges,andMunicipalConstruction.LCCC[CCCCCL14-269ATSWarehouseRpt.doc12PanGEO,Inc. —Irfr‘I‘W“‘‘C•r¶I—‘-i‘HIi_-sdtiers.AveS‘.4.—.——-/—414—--—Is•-L1..11*-._______1tIIiII9*AVS.J1•..11—11.4‘1.--IISL]O‘LIMh4-.-LIJ0N1)t4MI.I.II.1j1-—-.4___I$_L_1‘]sssoviI.‘,..-——-—-—--—--—-.w-—,‘——r-__________________________i1/—‘-i’ns‘4*-____1—4--..ii—kI---!i14-..9,‘—.......—C1.I,_____________Ia>-Iz0>0Cl,>3-.co<Cl)C.,aI(C0UEL_J[] ___——__I_LKEYEDSHEETNOTES---tci(‘1c..JONEWAYCPT-4CPT-31FT.TO10,800SQ.Ft.)REQUIREDRECYCUNGANDREFUSEAREA.15’SETBACKREQUIREDFORBUILDINGIFLETHAN25FEEtINHEIGHT.NEWPARKINGSTALL(MAXAllOWED,1STALLPER1,000NETSQ.FT.).LOADINGZONE.BUILDINGENTRANCE.APEDESTRIANTRUSSBRIDGEWHIT-WORTHST.:..‘:,EXISTINGBUILDINGCPTiLU00aZIaUI—0IUApproximateScale1”:20’Legend:•B-1PanGEOBoring•CPT-1ConePenetrometerTest\\PanGE®INCORP0MATIDATSWarehouse432ShaftuckAvenueSouthRenton,WashingtonNSITEANDEXPLORATIONPLANProjectNo.FigureNo.14-2692 A4035302520151050-25--30-35-40H-45-60-ClayandSiltbedsDenseSandyAlluviumoccasionalSiltytoClayeyinterbedsA’40353025201505G)-100-20H-25-30-35-40-45-50-55Note:AllsoilsunderthesiteareinterpretedasAlluvium.Densesandlayeratdepthisinterpretedasbedloadalluvium,butmaybeofmarineoroutwashorigin.GENERALIZEDSUBSURFACEPROFILESECTIONA-A’7SECTIONA-A’ProposedWarehouse?-?CPT-47DenseSandandGravelBedloadDeposit-10C0Cu>Cu-20w0100200300400500Qc(TSF)InterbeddedfineSand,SiltandClay,scatteredorganicsandpeat?DenseSandandGravelBedloadDeposit7-Dense,CoarseBedloadAlluviumorOutwash?0100200300400500Qc(TSF)H10InterbeddedfineSand,SiltandClay-50--55--65-0102030U)zU)01r..C,@1014050IIIIIpiiiiiIIiiiiIiiiiIIIIIiIIiIiiiIiiIiIiiiIiI80906070DistanCeinFeetLegend:CPT-2—_—jopraphicSurfaceGroundwaterLevelSoilUnitBoundar\-60--65130100110120Notes:1.SitetopographyinterpretedfromKingCountyGISdata.140PanGEeINCORPOHATIDATSWarehouse432ShattuckAvenueSouthRenton,WashingtonFigureNo.ProjectNo.14-2693 a)a,0Ca0-oia)a)900a,_L1_LU)C-ATSWarehouseLATERALPILECAPACITYfriGE®432ShattuckAvenueSouth18-INCHAUGERCASTPILEINC0RPoNATRenton,Washington40KIPLATERALLOAD-STATICProjectNo.14-269FigureNo.iiiiiII11111111IIIIIIliiiIIIIII0a0099-,ga,IIIIIIliiiliiiIIaa‘90]U0In+*U)*IzLu000acntra,z000+a0a9JJCzPaI0U1UUU)aF—aa0aa0iaII5:”0ta,a,a,zxaaaaaa00a)a)aaaa001111111,1,1.11,111111111IIIIIIIIIIIIIii 0aN+00+000U,0+000000.00•IqqLATERALPILECAPACITYATSWarehouse18-INCHAUGERCASTPILEFirtEEE432ShattuckAvenueSouth11KIPLATERALLOAD-SEISMICINCOHP0HATEDRenton,WashingtonProjectNo.14-269FigureNo.0.an009—2III11111111111111111111111111111liiiliiiIIIIIIiiiiia,.21o000000U,a,CopCCI)cS-e1c-L0lax—a,zCoNU)IiNIDU)aNaNNCl0N00110II00‘alapa,xxc0.FLii00/[tCCtCCCCEDCCCCCCC[C20I—UU-JUU0N09Co0Co>_u)o000o00—INCoU)CDEa,iiiiI11111IIIIIIII11111111II11111111IIIIiiIIIliiiii LLLLL[APPENDIXA[SummaryExplorationLogstnfl SAND/GRAVELSILT/CLAY.SPTApprox.Relative:SPTApprox.UndrainedShearDensityN-valuesDensity(%):Consistency:N-valuesStrength(psf)VeryLoose<4<15VerySoft<2<250Loose4tolO15-35Soft2to4250-500Med.Dense10to3035-65.Med.Stiff4to8500-1000Dense30to5065-85Stiff8to151000-2000VeryDense>5085-100VeryStiff15to302000-4000Hard>30>4000UNIFIEDSOILCLASSIFICATIONSYSTEMMAJORDIVISIONSGROUPDESCRIPTIONSi1GWWell-gradedGRAVELGravelGRAVEL(<5%fines)50%ormoreofthecoarseGP:Poorly-gradedGRAVELfractionretainedonthe#4flMQVEsieve.Usedualsymbolsleg.:GRAVEL‘>12°!GP-GMIfor5%to12%fines.:ines1GCClayeyGRAVELSWWell-gradedSANDSand:SAND(<5%fines)50%ormoreofthecourse:SPPoorly-gradedSANDfractienpassingthe#4sieve.Usedualsymbols(eg.SP-SMISAND(>12%fines)-MitySANDoroto/0nan.SCClayeySAND...MLSILTiLiquidLimit<50CLLeanSILTSiltandClayOLOrganicSILTorCLAY50%ormorepassing#200sieveMHElasticSILTLiquidLimit>50CHFatCLAYOHOrganicSILTorCLAYHighlyOrganicSoils,PTPEATLayered:Unitsofrpatedaldistinguishedbycolorand/orFissured:BreaksalongdefinedplanescompositionfrommaterialunitsaboveandbelowSlickensided:FractureplanesthatarepolishedorglossyLaminated:Layersofsoiltypically0.05to1mmthick,max.1cmBlocky:AngularsoillumpsthatresistbreakdownLens:LayerofsoilthatpinchesoutlaterallyDisrupted:SoilthatisbrokenandmixedInterlayered:AlternatinglayersofdifferingsoilmaterialScattered:LessthanoneperfootPocket:Erratic,discontinuousdepositoflimitedextentNumerous:MorethanoneperfootHomogeneous:SoilwithuniformcolorandcompositionthroughoutBCN:AnglebetweenbeddingplaneandaplanenormaltocoreaxisCOMPONENTDEFINITIONSCOMPONENTSIZE/SIEVERANGECOMPONENTSIZE/SIEVERANGEBoulder:>12inchesSandCobbles:3to12inchesCoarseSand:#4to#10sieve(4.5to2.0mm)GravelMediumSand:#10to#40sieve(2.0to0.42mm)CoarseGravel:3to3/4inchesFineSand:#40to#200sieve(0.42to0.074mm)FineGravel:3/4inchesto#4sieveSilt0.074to0.002mmClay<0.002mmPanGE®INCORPORATEDPhone:20&2610370TESTSYMBOLSforInSituandLaboratoryTestslistedin“OtherTests”column.CBRCompConDDDSCSPermPPRSCTVTXCUCCCaliforniaBearingRatioCompactionTestsConsolidationDryDensityDirectShearFinesContentGrainSizePermeabilityPocketPenetrometerR-valueSpecificGravityTorvaneTriaxialCompressionUnconfinedCompressionRELATIVEDENSITY/CONSISTENCYNotes:1.SoilexplorationlogscontainmaterialdescriptionsbasedonvisualobservationandfieldtestsusingasystemmodifiedfromtheUniformSoilClassificationSystem(USCS).Wherenecessarylaboratorytestshavebeenconducted(asnotedinthe“OtherTestscolumn),unitdescnptionsmayincludeaclassification.Pleaserefertothediscussionsinthereporttextforamorecompletedescriptionofthesubsurfaceconditions.2.Thegraphicsymbolsgivenabovearenotinclusiveofallsymbolsthatmayappearontheboreholelogs.Othersymbolsmaybeusedwherefieldobservationsindicatedmixedsoilconstituentsordualconstituentmaterials.DESCRIPTIONSOFSOILSTRUCTURESSYMBOLSSamplellnSitutesttypesandintervals2-inchODSplitSpoon,SPT(140-lb.hammer,30”drop)N3.25-inchODSpiltSpoon(300-lbhammer,30”drop)Non-standardpenetrationtest(seeboringlogfordetails)Thinwall(Shelby)tubeGrabRockcoreVaneShearMONITORINGWELL2GroundwaterLevelattimeofdrilling(ATD)VStaticGroundwaterLevelCement/ConcreteSealBentonitegrout/sealSilicasandbackfill•SlottedtipSloughBottomofBoringMOISTURECONTENTDryDusty,drytothetouchMoistDampbutnovisiblewaterWetVisiblefreewaterL[[[[[[[[[[[[[ICCH000LU0zu0U,00-ILU,H“ILU0qTermsandSymbolsforBoringandTestPitLogsFigureA-I —2”Asphalt\Browngravelandsand.(BaseCourse)Loose,rustybrownSAND:moistbecomingwet,finetocoarse2grained,interbedsofgraysiltyclayattop,tracefinegravel,laminated.S-i2(Alluvium)35.Wellgradedsand,tracefinegravel,laminaeofpeatandsiltattip,100S-2:dipSoft,greengray,slightlyClayeySILTwithSILTbeds:wet,non-plastico‘‘andlowplastic,rapiddilatancy,tracefinesand,woodandpeatyS-3materialscatteredthroughout,sub-horizontallaminae.(Alluvium)oGroundwaterinterpretedfromCPTlogs10Soft,interbeddedgreengraySiltyCLAYandSiltyfineSAND:wet,lowS-4gplastic,6”beds,laminated.(Alluvium)21Gradingtointerbeddedfinesandandsiltyclay,soWloose,beds1/4”to4”,sub-horizontal,laminated15:Loose,graySAND:wet,finetomediumgrained,poollygraded,S-6sub-horizontallylayered,20%interbedsofsiltyday.(Alluvium)2Gradingtoloose,gray,finetomediumsandwithoccasionalorganicVgrains,laminatedwithoccasionalsiltyclayinterbeds20.Loose,gray,finetomediumsand,wet,discretesiltinterbeds,S8:horizontallayering,non-plastic,rapiddilatancy,butslightlystickySoft,greengray,SiltyCLAYtoClayeySILT:wet,non-plastictolow5plastic,rapidtoslowdilatancy,laminatedwithoccasionalfinesand-2interlaminae,scatteredorganicbitsalongbedding.(Alluvium)250—35-1010a(3o3°00(3CompletionDepth:79.Oft<DateBoreholeStarted:1/19/07fDateBoreholeCompleted:1/19/07(3°LoggedBy:SHEDrillingCompany:HoloceneDrillingRemarks:StandardPenetrationTest(SPT)samplerdrivenwitha140lb.safetyhammer.HammeroperatedwithanautotripCMEhammermechanism.PanGEELOGOFTESTBORINGB-IINCORP0RATDFiaureA-2Phone:206.262.0370Sheet1of3Project:ATSBuildingRenovationSurfaceElevation:—30JobNumber:06-221ITopofCasingElev.:N/ALocation:450ShattuckAvenueSouth,Renton,WAIDrillingMethod:HollowStemAugerCoordinates:Northing:,Easting:SamplingMethod:SPTN-ValueA(I)—PLMoistureLL--H- ____ _ _ _ __2MATERIALDESCRIPTIONII>-‘05RQDRecovery0_ _ _ _ _______________________________________________________0501000Mediumdensetoloose,graySAND:wet,finetocoarse,wellgradedbutwithfiner/coarserinterbeds,tracesiltinfinebeds,sub-horizontallayering.(Alluvium)Thestratificationlinesrepresentapproximateboundaries.Thetransitionmaybegradual. Project:ATSBuildingRenovationSurfaceElevation:—30JobNumber:06-221TopofCasingElev.:N/ALocation:450ShattuckAvenueSouth,Renton,WADrillingMethod:HollowStemAugerCoordinates:Northing:,Easting:SamplingMethod:SPT0.(0—CD0)FMATERIALDESCRIPTION00N-ValueAPLMoistureLLIIRQD[CtttcRecoveryW%P%UIF/A.,,.,..,.,,,,,i.,,,CI:00)S-1135S-121400S-1324456S-141519507S-15231755S-16112360’7S-17222265——CompletionDepth:DateBoreholeStarted:DateBoreholeCompleted:LoggedBy:DrillingCompany:WASoft,graySILT:wet,non-plastictolowplastic,rapiddilatancy,sub-horizontallylaminated,1”finesandandbrownpeatylaminaeattip.(Alluvium)(Continued)Loose,graySAND:wet,finetocoarsegrained,wellgraded,homogenous,occasionalfinegravel,sub-horizontallylayered,3”siltyclaybedattip,sharpcontact,scatteredbrownorganics.(Alluvium)Soft,gray,SiltyCLAYtoClayeySILT:moisttowet,interbedded,lowtomediumplasticornon-plastic,laminatedwithoccasionalpeatylaminae,sandseam.(Alluvium)Gradingtosiltyfinesand,laminated,homogeneousDense,rustybrownSAND:wet,finetocoarsegrained,wellgraded,moderatelyweathered,withsubroundedfinetocoarsegravel,sub-horizontallayering.(BedloadAlluvium)Mainlyvolcanicclasts,someotherlithologiesInterbeddedfinetomediumsandwithfinetocoarsesandandgravel,moderatelyweatheredwithminorclayeymatrixHeavingconditions,rustybrownreturnwater,unevendriveindicatesfiner/coarserbeds.Coalclastonaugerfromaboutthislevel‘W///#‘)7r/////f////,%1-0H0C:0Co0z4:aa0Co00H4:010U0tCCCCC[CC[[t79.Oft1/19/071/19/07SHEHoloceneDrillingRemarks:StandardPenetrationTest(SPI)samplerdrivenwitha140lb.safetyhammer.HammeroperatedwithanautotripCMEhammermechanism.IPanGEE.LOGOFTESTBORINGB-I0INCORPORATLP°Phone:206.262.0370FigureA-2Thestratificationlinesrepresentapproximateboundaries.Thetransitionmaybegradual.Sheet2of3 0z00E(0U)a)0Ha)ECUU)(0U)0(0Project:ATSBuildingRenovationSurfaceElevation:—30JobNumber:06-221lopofCasingElev.:N/ALocation:450ShattuckAvenueSouth,Renton,WADrillingMethod:HollowStemAugerCoordinates:Northing:,Easting:SamplingMethod:SPTN-ValueAPLMoistureLLaMATERIALDESCRIPTIONU)U)0I—U)00.02>.U)RODRecovery5-18S-19S-204142172131162940Dense,rustybrownSAND:wet,finetocoarsegrained,wellgraded,moderatelyweathered,withsubroundedfinetocoarsegravel,sub-horizontallayering.(BedloadAlluvium)(Continued)Dense,yellowbrown,finetocoarsesand:wet,moderatelyweathered,subangulartosubrounded,blockytoplaty,minormatrixVerydense,brownsandwithgravel,wet,wellgraded,beddedandlaminatedwithalignedtabulargrains-c0U)65707580859095.\BottomofBoringF00q0U0z00.ciU)00U)INUCompletionDepth:79.QftRemarks:StandardPenetrationTest(SPT)samplerdrivenwitha140lb.safetyhammer.DateBoreholeStarted:1/19/07HammeroperatedwithanautotripCMEhammermechanism.DateBoreholeCompleted:1/19/07LoggedBy:SHEDrillingCompany:HoloceneDrillingPanGE®LOGOFTESTBORINGB-IINC0PRAEFinureA-20Phone:206.262.0370Thestratificationlinesrepresentapproximateboundaries.Thetransitionmaybegradual.Sheet3of3 Operator:DafniSounding:CPT-01ConeUsed:D5G0708PanGeo,Inc.CPTDate/Time:1/9/200710:23:47AMLocation:ATSBuildingRenovationJobNumber:06-221[MaximumDepth=51.18feetDepthIncrement=0.164feet[[0rEr[r0102030405060Depth(if)[TipResistanceFrictionRatioPorePressureSoilBehaviorTypetSPTNtOcTSFFs/Oc(%)PwPSIZone:UBC-198325006-20500120Ia a aaa11111 aaaaa a a a a aliii1111111111 ••iiiaaaaaaaIiiIII11111111 IIIIIII IIIIIa -——9r-aTr-r—r-a—ma9-nTIrIIIIII I IIaII1111111 (a a aaa a aaaII111111 aaaaaaaa aIaII1111111 aa a a a aaaaaia1111111 IIIIIIIIIliiiII aaaaa a a aaliiia aaaaaaa aa aaaaaa111111l.iaaiaaaaaa111111 aaaaIII111111 aaaaaaaaIllIll IIII aaaaailiiiliii iaaiaaaiaau aaaaaaiaiaaa aa aaaaaiaala aaaaa aai a aaa -—a911TTh1F11111aiaaa a i aaaaia ai a aaaaiaaaia aiaaa a i aaaaa ai iaaaiaiaiaa aaaaa a a aaaaaa a aaaaa aaaaaaa aaaaaa a a a aaa a a aaaaaaaaaaa aaaaaaa a aaaaaIaaaaa a a a aaaaaaaaaaa aaaaa aaaa aaaa aa a aaaaaaaaaa aaaa a aaaaaa a aa a a a aaaaaaaaaa -liii11111aaaaaa4aaaaaaaaaaaaaa a aiaai1aaa aaaaaaa a a aaaaaa a a aaaaaaaaaa a aaaaaaa a a aaa a 1aaaa‘IIaaaa’aaaaa---H:---I[60%Hammer50IIIliiiaaaaaaaaa aaaa a a aaaaaaaaaaaaaa aa aaaaaaa aa aa a aaaaaa aaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaa aaaaaaaa T9991arFa a a aaaaaa aaaaaaaaa a a a a aaaa aaaaaaaaaa a a a a a a a a aaaaaaaa a a a a a a a a aa aaaaaa aa a a a a a a aaa aaaaaa aaaa a a a a aaaaaaaa aaaaa a a a a aaaaa aa aaaaaaaaTiiiamraaaaaaaaa aaaaa aa aaaaaaaaaaaaaaa aa aaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaa a aaaaaa aaaaaaaaa a aaaaaa aaaaaaaaa a a a a a a aaaaaaaaa a_aaaaaaaaa aaaaaa aa aaaaaaaa aaaa a a a a aaaaaaa aaaaaaaa aaaaaaaa aaaaaaa aaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aa a a a aaaaa aaaaaa a a a a aaaa aaaa:::IiiJJJaa.Laaa a aaaaa aaaaaaaaa aaa a aa aaa aaaaaaaaaaaa a a a a a a aaaaaaaaaaaaaaaaaa a aaaaaaaa aaaaaaa a a a a aaaaaaa aaa aaaaaa aa a aaaaaa aaaaaaaa a aaaaaaaaa a aaaaaaaa aaaaaaaaa[CCCCC1sensitivefinegrained12organicmaterial13clay[14siltyclaytoclay5clayeysilttosiltyclay16sandysilttoclayeysilt[•7siltysandtosandysiltF8sandtosiltysandZ9sand•10gravellysandtosandIiiverystifffinegrained(*)I12sandtoclayeysand(*)Fig.A-3SoilbehaviortypeandSPTbasedondatafromUBC-1983NorthwestConeExploration PanGeo,Inc.Operator:DafniSounding:CPT-02ConeUsed:D500708CPTDate/Time:1/9/200711:59:45AMLocation:ATSBuildingRenovationJobNumber:06-221-1025IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII—rT—-r—rrIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIZone:UBC-198312IIIIIIHIIIIIFFII11111.i1111111111IIIIIIIiIll.I111111illIIIIIIIIIIIIIIIIIII-IIFIII‘IIIIIIIIIIIIIIIIIIIIIIIIIIIrrrrlTTTVr—11111111111IIIHHWIItITtIIIIlIL4IAIt4ltIIIIIIIIIIII—II11111111III11111HH•IIIiIII!1111IIIIIIIIP1111IIIIIIIIIIIII1111111111IF11111litILLLLL’JJ.1£VI.111111111FF_ _ _ _ _____ _ _ _ _ _ ___IFIIiIIFIIIFIIFIIIFIIIIIIFIIIFIIIFIIFIIIIIIIFIIIIIIIIIIFIIIIIIIIIIFIIIIIIIFIIFIIIIIFFFFFFFFIIFFIFFFFFFIIFFIFFFIFFIIFFIFFFIIFIIFFIIFFIIFII60%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52.33feetDepthIncrement=0.164feetI1sensitivefinegrained•2organicmaterial13clay14siltyclaytoclay*5clayeysilttosiltyclay16sandysilttoclayeysilt17siltysandtosandysilt[18sandtosiltysand[.19sand•10gravellysandtosandIiiverystifffinegrained(*)I12sandtoclayeysand(*)Fig.A-4TipResistanceQcTSFFs/Qc(%)02500PorePressurePwPSISoilBehaviorType*SPTN*0010200Depth30(if)FrictionRatio6IIIIIIIIIIIIIIIIIIIIIIIIIIIV7T-IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII_r_IIiiIFIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIV_I_J-.1—V—III405060SoilbehaviortypeandSPTbasedondatafromU8C-1953NorthwestConeExploration Operator:BrownSounding:CPT-03ConeUsed:DD01254PangeoCPTDate/Time:11/25/20148:00:34AMLocation:432ShattuckAveJobNumber14-279[MaximumDepth=24.44feetDepthIncrement=0.164feet17siltysandtosandysilt8sandtosiltysand9sandTipResistanceQcTSF08000IIIII I IIIIIIIIIIIIIIIIIIII-r--01020I I III I III I III I III I III I III I II-1——F—III I IIIIIIIIIIIIIII III III III III III I I I IIII I I IIIIII IIIIII II IIIIII IIIIII IIIIII IIIIII IIIII I IIIII I IIIII I IIIIIIZone:UBC-1983012I—1IIIII1II III IIIIIIIIIIIIIII I I III IIIIIIIIIII III TTrIIIIIIIIIIIII IIII II—-1——F—II100II IIII I I I IIIIIIIIII IIIIIII IIIIIIIIIIIIIII I II II IIIIIII IIIIIII II IIIIIIIII IIIIIIIII T319—rrrrIIIIIJ IIIIIIII IIIIII I IIII I IIIIIIII IIIIII IIIIIIIIIIIII IIIIIIIII IIIIII I IIIIIIII I IIIII I IIIIIIIIIIIIIIIII IIIIIIIII IIIII I -rHiiTrII I IIIIII IIIIII IIII I Depth30(if)FrictionRatioPorePressureSoilBehaviorType*SPTN*FslQc(%)PwPSI60%Hammer6-10600I11111 IIII III III IIIIII IIII IIII II IIIIIII III I I I III III IIII IIIIIIII 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IIIIIIIIIN1sensitivefinegrainedI2organicmaterial13clayInsituEngineeringW4siltyclaytoclayI5clayeysilttosiltyclay16sandysilttoclayeysilt110gravellysandtosand•11verystifffinegrained(*)112sandtoclayeysand(*)Fig.A-5SoNbehaviortypeandSPTbasedondatafromUBC-1983 i—___Operator:BrownSounding:CPT-04ConeUsed:DDG1254PangeoCPTDate/Time:11/25/20148:42:57AMLocation:432ShattuckAveJobNumber:14-2791sensitivefinegrainedI2organicmaterialSclayInSituEngineeringMaximumDepth=51.18feet14siltyclaytoclay05clayeysilttosiltyclay16sandysilttoclayeysiltDepthIncrement=0.164feet•7siltysandtosandysilta8sandtosiltysand9sand•10gravellysandtosandIiiverystifffinegrained(*)•12sandtoclayeysand(*)Fig.A-6TipResistanceQcTSF0FrictionRatio8000PorePressureSoilBehaviorType*00Zone:UBC-198312ml.IIIIIIII11111IIIIIII111ittThwII[IIjIIIFI—ILIIlIIIIIil-rirr111110102030405060Depth(if)PillIIIIIIIIIiIIIIIFIIIIIJIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII•IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII—-IIIIIIIIIIIIIIIIIIIIIIIIIIIIIFIIIIFPIIFIIIIFIIIIII•IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIItIIIIIIIIIIIIIIIIIIIIIIJLIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIItIIIIIIIIIIIFsIQc(%)PwPSI6-1060IIIIIIIIIIIIIIFIIPIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII11111IIIIIIIFIIIIIIIIIIIIIIIJIIIIIIIIIIIIIIIIIIIIIII——r—r-rriIJIIIIIIIIIIIIIIIIIIIIIIIIIIIII11111IIIIIIIrII11111FIIIIIIIIIFIIIIIIIIIrillIIIIII1111IIIIIIIIIIIIIJIllIIPIIIIIIIIII1111IIIIIII111111IIII11111171IIII111111IIIII111111IIIIIIIIIIliiiIIIIII1111•IIIIIIIIIIIIIII1111IIIIIIliiiIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIliiiIIIliiiIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIliiiIIIIIliiiIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII111111IIIIIIIIIII111111IIIIIIIIIIIIIIIIIIIIIIFIIIIIIIIIIIIIIIliiiIIII1111IIIII11111IIIII1111IIIIIIIIIIIIIIIIIL_IJ_J_1IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIJIllIIIIIIIliiiIIIIIII1111IIIIIIIliiiIIIIIII111111PIIII111111IiIIIIIIIIIIIIIIIJIIIIIIIIIIIIIIIIIIIIPIIIIIIIIIIIIIIIIIIIIIIIiSPTN*60%Hammer100IIIIIIIIIIIIIIIIIIIFIIIIJIIIIIIIII[IIIIIIIIIrIIIIIIIIIIIIIIIIIIIIIIIIIIIFIIIIIIIIFIIIIIJIIIIIIIFIIIIIT1111mmrIIIIIIIIIIIFIIIIIIIIIIIIIIIIIIIIIIFIIIIIrIIIIIIIIIJIIIIIIIPIIIIIIIIIIIIIIIIIIIIFIIIIIIIIIIIIIIIIIIIIIIIIIIII111ThThThFFIIIIIIIIIIIIIIIIIIII[IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIILIIIIIIrIIIIIFIIIIIIIIrIIIIJIIIIIIIIIJIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIiIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIliiiIII1111IIIIIIIIIIIIIII1JJJ_I_LLIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIJIIIIIFIIIIIIIIIIIIIIIIIIIIpsIIIIIIIIIIIIIIIIIFIIIIIIIIIIIIIIIIIIIIFFii•16fl1IFjIIII1IIIIIIIIIliiiIFIf!FIIIIIIIIIIIIIII/.’lIIL11111111111II111111111111111111111111111111111111111111111111111111111111111II111111IIIIIIIFIIIIFIIIIIIIIIIIIIIIFIIIIIIIIIIIIIIIIIIIIiIIIIIIISoilbehaviortypeandSPTbasedondatafromUBC-1983