Designation:D6327−10StandardTestMethodforDeterminationofRadonDecayProductConcentrationandWorkingLevelinIndoorAtmospheresbyActiveSamplingonaFilter1ThisstandardisissuedunderthefixeddesignationD6327;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodprovidesinstructionforusingthegrabsamplingfiltertechniquetodetermineaccurateandreproduc-iblemeasurementsofindoorradondecayproduct(RDP)concentrationsandoftheworkinglevelvaluecorrespondingtothoseconcentrations.1.2MeasurementsmadeinaccordancewiththistestmethodwillproduceRDPconcentrationsrepresentativeofclosed-buildingconditions.Resultsofmeasurementsmadeunderclosed-buildingconditionswillhaveasmallervariabilityandaremorereproduciblethanmeasurementsobtainedwhenbuildingconditionsarenotcontrolled.Thistestmethodmaybeutilizedundernon-controlledconditions,butagreaterdegreeofvariabilityintheresultswilloccur.Variabilityintheresultsmayalsobeanindicationoftemporalvariabilitypresentatthesamplingsite.1.3Thistestmethodutilizesashortsamplingperiodandtheresultsareindicativeoftheconditionsonlyattheplaceandtimeofsampling.Theresultsobtainedbythistestmethodarenotnecessarilyindicativeoflongertermsofsamplingandshouldnotbeconfusedwithsuchresults.Theaveragingofmultiplemeasurementsoverhoursanddayscan,however,provideusefulscreeninginformation.Individualmeasure-mentsaregenerallyobtainedfordiagnosticpurposes.1.4Therangeofthetestmethodmaybeconsideredfrom0.0005WLtounlimitedworkinglevels(WL),andfrom40Bq/m3tounlimitedforeachindividualrandondecayproduct.1.5Thistestmethodprovidesinformationonequipment,procedures,andqualitycontrol.Itprovidesformeasurementswithintypicalresidentialorbuildingenvironmentsandmaynotnecessarilyapplytospecializedcircumstances,forexample,cleanrooms.1.6ThevaluesstatedinSIunitsaretoberegardedasstandard.Noother...
