Designation:D6747−15StandardGuideforSelectionofTechniquesforElectricalLeakLocationofLeaksinGeomembranes1ThisstandardisissuedunderthefixeddesignationD6747;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguideisintendedtoassistindividualsorgroupsinassessingdifferentoptionsavailableforlocatingleaksininstalledgeomembranesusingelectricalmethods.Forclarity,thisguideusestheterm“leak”tomeanholes,punctures,tears,knifecuts,seamdefects,cracks,andsimilarbreachesinaninstalledgeomembrane(asdefinedin3.2.3).1.2Thisguidedoesnotcoversystemsthatarerestrictedtoseamtestingonly,nordoesitcoversystemsthatmaydetectleaksnon-electrically.Itdoesnotcoversystemsthatonlydetectthepresence,butnotthelocationofleaks.1.3(Warning—Theelectricalmethodsusedforgeomem-braneleaklocationcouldusehighvoltages,resultinginthepotentialforelectricalshockorelectrocution.Thishazardmightbeincreasedbecauseoperationsmightbeconductedinornearwater.Inparticular,ahighvoltagecouldexistbetweenthewaterorearthmaterialandearthground,oranygroundedconductor.Theseproceduresarepotentiallyverydangerous,andcanresultinpersonalinjuryordeath.Theelectricalmethodsusedforgeomembraneleaklocationshouldbeattemptedonlybyqualifiedandexperiencedpersonnel.Appro-priatesafetymeasuresmustbetakentoprotecttheleaklocationoperatorsaswellasotherpeopleatthesite.)1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatoryrequirementspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4439TerminologyforGeosyntheticsD7002PracticeforElectricalLeakLocationonExposedGeomembranes...
