Designation:C458/C458M−98(Reapproved2011)´1StandardTestMethodforOrganicFiberContentofAsbestos-CementProducts1ThisstandardisissuedunderthefixeddesignationC458/C458M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.´1NOTE—UnitsinformationwaseditoriallycorrectedinJanuary2012.1.Scope1.1Thistestmethodcoversthedeterminationoftheorganicfibercontentofasbestos-cementproducts.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Warning—Breathingofasbestosdustishazardous.Asbestosandasbestosproductspresentdemonstratedhealthrisksforusersandforthosewithwhomtheycomeintocontact.Inadditiontootherprecautions,whenworkingwithasbestos-cementproducts,minimizethedustthatresults.Forinforma-tiononthesafeuseofchrysotileasbestos,referto“SafeUseofChrysotile:AManualonPreventiveandControlMeasures.”21.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3C114TestMethodsforChemicalAnalysisofHydraulicCementD2946TerminologyforAsbestosandAsbestos–CementProductsE11SpecificationforWovenWireTestSieveClothandTestSievesE50PracticesforApparatus,Reagents,andSafetyConsid-erationsforChemicalAnalysisofMetals,Ores,andRelatedMaterials2.2BNQStandard:4P2639-230Asbestos-CementSheets:MethodsofTestandControl3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1organicfibercontent—thepercentageoforganicmat-terexpressedastheequivalentpercentageofcelluloseinadrie...
