Designation:D6610–01aStandardPracticeforManuallySamplingCoalfromSurfacesofaStockpile1ThisstandardisissuedunderthefixeddesignationD6610;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversproceduresforobtainingamanualgrosssamplefromthesurface2ofcoalstockpiles.Theseproceduresareusedtoprovidegrosssamplesforgenerallaboratoryanalysisandforestimatingqualityandtotalmois-ture.ThegrosssampleistobecrushedandfurtherpreparedforanalysisinaccordancewithMethodD2013.Mechanicalequipmentsuchasaugersamplersandcoredrillrigsareaddressedbyotherguides(D4916)orworkingpapers.1.2Theuseriscautionedthatsamplesofthistypedonotsatisfytheminimumrequirementsforprobabilitysamplingandassuchcannotbeusedtodrawstatisticalinferencesabouttheprecision,standarderror,orbias.1.3Thissamplingmethodisintendedforuseonlywhensamplingbymorereliablemethodsthatprovideaprobabilitysampleisnotpossible.1.4ThequantitiesstatedineitheracceptableSIunitsorininch-poundunitsareregardedseparatelyasstandard.Thequantitiesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother,withoutcombiningquantitiesinanyway.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D2013MethodofPreparingCoalSamplesforAnalysis3D2234PracticeforCollectionofaGrossSampleofCoal3D4749TestMethodforPerformingSieveAnalysisofCoalandDesignatingCoalSize3D4916GuideforMechanicalAugerSampling3E105PracticeforProbabilitySamplingofMaterials43.Terminology3.1Definitions:3.1.1particlesizesegregation,n—thesegregationofsizedparticlestospecificareasasaresultoftheparticlesrolling,f...
