Designation:D5220−14StandardTestMethodforWaterMassperUnitVolumeofSoilandRockIn-PlacebytheNeutronDepthProbeMethod1ThisstandardisissuedunderthefixeddesignationD5220;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthecalculationofthewatermassperunitvolumeofsoilandrockbythermalizationorslowingoffastneutronswheretheneutronsourceandthethermalneutrondetectorareplacedatthedesireddepthintheboredholelinedbyanaccesstube.1.1.1ForlimitationsseeSection6onInterferences.1.2Thewatermassperunitvolume,expressedasmassperunitvolumeofthematerialundertest,iscalculatedbycomparingthethermalneutroncountratewithpreviouslyestablishedcalibrationdata(seeAnnexA1).1.3Aprecisionstatementhasnotbeendevelopedforthisstandardatthistime.Therefore,thisstandardshouldnotbeusedforacceptanceorrejectionofamaterialforpurchasingpurposesunlesscorrelatedtootheracceptedASTMmethods.1.4Units—ThevaluesexpressedinSIunitsareregardedasthestandard.Theinch-poundunitsgiveninparenthesesmaybeapproximateandareprovidedforinformationonly.1.5AllobservedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.1.5.1Theproceduresusedtospecifyhowdataarecollected,recorded,andcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproce-duresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsider-ationsfortheuser’sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itisthe...
