Designation:F2898−11AnAmericanNationalStandardStandardTestMethodforPermeabilityofSyntheticTurfSportsFieldBaseStoneandSurfaceSystembyNon-confinedAreaFloodTestMethod1ThisstandardisissuedunderthefixeddesignationF2898;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodmaybeusedtodeterminetheperme-abilityrateofsyntheticturfplayingfieldsystems,playingfieldsystemswithpadorpremoldeddrainageboards,orboth,playingfieldsystemswithpremoldedpanelbasesystems,porousandnonporouspavementsystems,orbasestonesystemsinthefield,oracombinationthereof,bynon-confinedareafloodtestmethod.Thissystemissuitableforuseonthefinishsyntheticturfplayingsurfaceandonthestonebasesystembelowtheplayingsystem.1.2Thistestmethodisapplicableforsyntheticturfplayingfieldsystemsandstonebaseswheresystemisdesignedforpermeabilitythroughthesyntheticturfsurfaceandorthroughabasestonesurface.Itisalsosuitableforsyntheticturfplayingsystemsthataredirectlyunderlinedwithresilientandnonre-silientpre-moldeddrainageboardssystemsandporouspave-mentbasesystems.Themethodtestsalargersurfaceareathanconfinedringtestmethodsanddecreasestheeffectlateralflowwithinthesurfaceandorstonebasesystemduetothelargeincreaseintheratiooftestsurfaceareatothesyntheticturfplayingsystemandstonebasesystemthickness.Themethodisintendedtomoreaccuratelymimicnaturalstormflowcondi-tionsbyeliminatingtheeffectofheadpressurecreatedbythewatercolumnheightwhichcreatesapressureflowconditionatthesurfaceofthetestareathatdoesnotexistnaturally.1.3Thistestmethodisintendedforfinish-gradedandcompactedstoneorfinishedsurfacesthatareinstalledwithcross-slopegradientsoflessthan2.0%orunderconditionswheretheeffectofcross-slopeismitigatedbyhighsystempermeability.Highslopingsystemstendtohavehighslopingbasesystemswhichmayimpactresultsduetoincreasesinthelat...
