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SunwoodDriveΑStreetImprovements <br />Ramsey,Minnesota <br />NTIProjectNo.16.61770.100 <br />PLACEMENTandCOMPACTIONOFENGINEEREDFILL <br />UnlessotherwisesupersededwithinthebodyoftheGeotechnicalExplorationReport,thefollowing <br />criteriashallbeutilizedforplacementofengineeredfillonproject.Thisincludes,butisnotlimited <br />toearthenfillplacementtoimprovesitegrades,fillplacedbelowstructuralfootings,fillplaced <br />interiorofstructure,andfillplacedasbackfilloffoundations. <br />Engineeredfillplacedforconstruction,ifnecessaryshouldconsistofnatural,nonorganic,competent <br />soilsnativetotheprojectarea.Suchsoilsmayinclude,butarenotlimitedtogravel,sand,orclays <br />withUnifiedSoilClassificationSystem(ASTMD2488)classificationsofGW,SP,orSM.Useofsiltor <br />clayeysiltasprojectfillwillrequireadditionalreviewandapprovalofprojectGeotechnicalEngineer <br />ofRecord.SuchsoilshaveUSCSclassificationsofML,MH,MLCL,MHCH.Useoftopsoil,marl,peat, <br />otherorganicsoilsconstructiondebrisand/orotherunsuitablematerialsasfillisnotallowed.Such <br />soilshaveUSCSclassificationsofOL,OH,Pt. <br />Engineeredfill,classifiedasclay,shouldbetemperedsuchthatthemoisturecontentatthetimeof <br />placementisequaltoandnomorethan3percentabovetheoptimumcontentforasdefinedbythe <br />appropriateproctortest.Likewise,engineeredfillclassifiedasgravelorsandshouldbetempered <br />suchthatthemoisturecontentatthetimeofplacementiswithin3percentoftheoptimumcontent. <br />Allengineeredfillforconstructionshouldbeplacedinindividual8inchmaximumdepthlifts.Each <br />liftoffillshouldbecompactedbylargevibratoryequipmentuntiltheinplacesoildensityisequalto <br />orgreaterthanthecriteriaestablishedwithinthefollowingtabulation. <br />1 <br />CompactionCriteria(%respectiveProctor) <br />TypeofConstructionClaySandorGravel <br />GeneralEmbankmentFillMin.95Min.95 <br />EngineeredFillbelowFoundationsNAMin.98 <br />EngineeredFillbelowFloorSlabsNAMin.98 <br />EngineeredFillplacedasPavementAggregateBaseNAMin.100 <br />EngineeredFillplacedtowithin3feetofpavementMin.95Min.95 <br />aggregatebase <br />EngineeredFillplacedwithin3feetofpavementMin.100Min.100 <br />aggregatebase <br />1Unlessotherwiserequired,compactionshallbebasedontheStandardProctorTest(ASTMD698). <br />Densitytestsshouldbetakenduringengineeredfillplacementtodocumentearthworkhasachieved <br />necessarycompactionofthematerial(s).Recommendationsforinteriorfillplacementandbackfillof <br />foundationwallsarepresentedwithinothersectionsofthisreport. <br /> <br />