Designation:D5495−21StandardPracticeforSamplingwithaCompositeLiquidWasteSampler(COLIWASA)1ThisstandardisissuedunderthefixeddesignationD5495;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedescribestheprocedureforsamplingliquidswiththecompositeliquidwastesampler,or“COLI-WASA.”TheCOLIWASAisanappropriatedeviceforobtain-ingarepresentativesamplefromstratifiedorunstratifiedliquids.Itsmostcommonuseisforsamplingcontainerizedliquids,suchastanks,barrels,anddrums.Itmayalsobeusedforpoolsandotheropenbodiesofstagnantliquid.NOTE1—AlimitationoftheCOLIWASAisthatthestoppermechanismmaynotallowcollectionofapproximatelythebottom2.54cm(1in.)ofmaterial,dependingonconstructionofthestopper.1.2TheCOLIWASAshouldnotbeusedtosampleflowingormovingliquids.1.3Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.ReportingoftestresultsinunitsotherthanSIshallnotberegardedasnonconformancewiththisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4687GuideforGeneralPlanningofWasteSamplingD5088PracticeforDecontaminationofFieldEquipmentUsedatWasteSitesD5283PracticeforGenerati...
