Designation:C1255−11StandardTestMethodforAnalysisofUraniumandThoriuminSoilsbyEnergyDispersiveX-RayFluorescenceSpectroscopy1ThisstandardisissuedunderthefixeddesignationC1255;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoverstheenergydispersiveX-rayfluorescence(EDXRF)spectrochemicalanalysisoftracelevelsofuraniumandthoriuminsoils.Anysamplematrixthatdiffersfromthegeneralgroundsoilcompositionusedforcalibration(thatis,fertilizerorasampleofmostlyrock)wouldhavetobecalibratedseparatelytodeterminetheeffectofthedifferentmatrixcomposition.1.2Theanalysisisperformedafteraninitialdryingandgrindingofthesample,andtheresultsarereportedonadrybasis.Thesamplepreparationtechniqueusedincorporatesintothesampleanyrocksandorganicmaterialpresentinthesoil.Thistestmethodofsamplepreparationdiffersfromothertechniquesthatinvolvetumblingandsievingthesample.1.3Linearcalibrationisperformedoveraconcentrationrangefrom20to1000µgpergramforuraniumandthorium.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsinparenthesesareforinforma-tiononly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C859TerminologyRelatingtoNuclearMaterialsC998PracticeforSamplingSurfaceSoilforRadionuclidesD420GuidetoSiteCharacterizationforEngineeringDesignandConstructionPurposes(Withdrawn2011)3D1452PracticeforSoilExplorationandSamplingbyAugerBoringsD1586TestMethodforPenetrationTest(SPT)andSplit-BarrelSamplingofSoilsD1587PracticeforThin-WalledTubeSamplingofSoilsforGeotechnicalPurposesD2113PracticeforRockCoreDrillingandSamplingofRockforSiteInves...
