Designation:D6461/D6461M−22StandardSpecificationsforSiltFenceMaterials1ThisstandardisissuedunderthefixeddesignationD6461/D6461M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversrequirementsandtestmethodsforgeotextilefabricsandassociatedcomponentsusedintemporarysiltfenceapplications.Table1isamaterialpur-chasingspecificationbasedonAASHTOM288.Table2isaspecificationtobeusedinareasofhighwaterflow.ThespecificationinTable2isahigherstrength,higherflowoptionthanTable1.Table2propertiescanwithstandmorehydraulicflowthanthespecificationlistedinTable1.TheTable2specificationshouldbeusedinsensitiveapplications,suchasareasnearregulatedwatersandwetlands,butalsoareasthatarepronetohighflowrunoffthatrequireincreasedstructuralstability.ThedesignprofessionalhastheoptionofTable2wherethespecificationslistedinTable1arenotsufficienttomeetthedemandofrunoff.1.2Bothspecificationsareapplicabletotheuseofageotextileasaverticalpermeableinterceptordesignedtoremovesuspendedsoilfromoverland,nonconcentratedwaterflow.Thefunctionofatemporarysiltfenceistotrapandallowsettlementofsoilparticlesfromsediment-ladenwater.Thepurposeistogreatlylimitthetransportoferodedsoilfromconstructionsitesandotherareasaffectedbywaterrunoff.NOTE1—Itshouldbenotedthatproperinstallationandmaintenancearecriticalfortheeffectivefunctioningofsiltfence.1.3Thetestsusedtocharacterizethesiltfenceareintendedtoensuregoodworkmanshipandqualityandarenotnecessar-ilyadequatefordesignpurposesinviewofthewidevarietyofpossiblesedimentsandperformanceobjectives.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewit...
