Designation:D7831−20StandardPracticeforSamplingofTanksbyFieldPersonnel1ThisstandardisissuedunderthefixeddesignationD7831;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversinformationforfieldpersonneltofollowinordertocollectsamplesfromtanks.1.2Thepurposeofthispracticeistohelpfieldpersonnelinplanningandobtainingsamplesfromverticalandhorizontaltanks,open-toppedrectangular/squaretanks,railroadandtrucktankers,vacuumtrucks,andtankswithmultiplecompartmentsusingequipmentandtechniquesthatwillassistinmeetingthesamplingobjectives.1.3Thepracticeisapplicabletohazardousmaterials,products,rawmaterials,by-product,orwaste.1.4Samplingfromcirculatingpumpdischargevalvesandtanktransferlinesisnotaddressedinthispractice.1.5Units—Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4687GuideforGeneralPlanningofWasteSamplingD4840GuideforSampleChain-of-CustodyProceduresD5088PracticeforDecontaminationofFieldEquipmentUsedatWasteSitesD5283PracticeforGenerationofEnvironmentalDataRe-latedtoWasteManagementActivities:QualityAssuranceandQualityControlPlanningandImp...
