Designation:D6707−06(Reapproved2011)StandardSpecificationforCircular-KnitGeotextileforUseinSubsurfaceDrainageApplications1ThisstandardisissuedunderthefixeddesignationD6707;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverscircular-knitgeotextilesforuseontheoutsideofperforatedpipesandClassBgeocom-positesperSpecificationD7001indrainageapplications.1.2Thetestsusedtocharacterizethegeotextileareintendedtoensuregoodworkmanshipandquality,andarenotneces-sarilyadequatefordesignpurposesinviewoftheimportanceofenvironmentalfactorsandspecificperformanceobjectives.Testshavebeenselectedwithessentiallyneutralaqueoussystemsinmind.Othertestsmaybenecessarytoestablishchemicalresistanceanddurabilityundertheconditionsofaparticularapplication.1.3Thisstandardmayinvolvehazardousmaterials,opera-tions,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatoryrequirementspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD4439TerminologyforGeosyntheticsD4491TestMethodsforWaterPermeabilityofGeotextilesbyPermittivityD4751TestMethodforDeterminingApparentOpeningSizeofaGeotextileD6241TestMethodfortheStaticPunctureStrengthofGeotextilesandGeotextile-RelatedProductsUsinga50-mmProbeD7001SpecificationforGeocompositesforPavementEdgeDrainsandOtherHigh-FlowApplications3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1circularknit—astructureproducedbyinterloopingoneormoreendsofyarnorcomparablematerialinacontinuouslycircularorientationaroundthefabric.3.1.2filtration—theequilibriumsoiltogeotextilesystemthatallowsforadequateliquidflowwithlimitedsoillossacros...
