Designation:D1987−07(Reapproved2016)StandardTestMethodforBiologicalCloggingofGeotextileorSoil/GeotextileFilters1ThisstandardisissuedunderthefixeddesignationD1987;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisusedtodeterminethepotentialfor,andrelativedegreeof,biologicalgrowthwhichcanaccumulateongeotextileorgeotextile/soilfilters.1.2Thistestmethodusesthemeasurementofflowratesoveranextendedperiodoftimetodeterminetheamountofclogging.1.3Thistestmethodcanbeadaptedfornonsaturatedaswellassaturatedconditions.1.4Thistestmethodcanuseconstantheadorfallingheadmeasurementtechniques.1.5Thistestmethodcanalsobeusedtogiveanindicationastothepossibilityofbackflushingand/orbiocidetreatmentforremediationpurposesifbiologicalcloggingdoesoccur.1.6ThevaluesinSIunitsaretoberegardedasthestandard.Thevaluesprovidedininch-poundunitsareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1776PracticeforConditioningandTestingTextilesD4354PracticeforSamplingofGeosyntheticsandRolledErosionControlProducts(RECPs)forTestingD4439TerminologyforGeosyntheticsD4491TestMethodsforWaterPermeabilityofGeotextilesbyPermittivityD5101TestMethodforMeasuringtheFiltrationCompat-ibilityofSoil-GeotextileSystemsG22PracticeforDeterminingResistanceofPlasticstoBacteria(Withdrawn2002)3E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1Definitions:3.1.1geotextile,n—apermeablegeosyntheticcomprisedsolelyoftextiles.3.1.2permeability,n—therateofflowofaliquidunderadiffer...
