Designation:D6914/D6914M−16StandardPracticeforSonicDrillingforSiteCharacterizationandtheInstallationofSubsurfaceMonitoringDevices1ThisstandardisissuedunderthefixeddesignationD6914/D6914M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thispracticecoversproceduresforusingsonicdrillingmethodsintheconductingofsubsurfaceexplorationforsitecharacterizationandintheinstallationofsubsurfacemonitor-ingdevices.1.2Theuseofthesonicdrillingmethodforexplorationandmonitoring-deviceinstallationmayofteninvolvepreliminarysiteresearchandsafetyplanning,administration,anddocu-mentation.1.3SoilorRocksamplescollectedbysonicmethodsareclassedasgroupAorgroupBinaccordancewithPracticesD4220.Othersamplingmethods(GuideD6169)maybeusedinconjunctionwiththesonicmethodtocollectsamplesclassedasgroupCandGroupD.Otherdrillingmethodsaresumma-rizedinGuideD6286.1.4Units—Thevaluesstatedineitherinch-poundunitsorSIunits[presentedinbrackets]aretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.Reportingoftestresultsinunitsotherthanin-poundshallnotberegardedasnonconformancewiththispractice.1.5AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026,unlesssupersededbythisstandard.1.6Thispracticeoffersasetofinstructionsforperformingoneormorespecificoperations.Itisadescriptionofthepresentstate-of-the-artpracticeofsonicdrilling.Itdoesnotrecommendthismethodasaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthispracticemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentor...
