Designation:D4978−95(Reapproved2007)StandardTestMethodsforScreeningofReactiveSulfidesinWaste1ThisstandardisissuedunderthefixeddesignationD4978;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodsareapplicabletothescreeningofreactivesulfidesinwastes,liquids,sludges,semisolids,andsolidsbyusingthefollowingmethods:SectionsTestMethodA—LeadAcetatePaper9–14TestMethodB—GasDetectorTube15–191.2Thesetestmethodsarenotapplicableindeterminingthetypeandconcentrationofreactivesulfides.1.3Thesetestmethodsaredesignedandintendedasapreliminarytesttocomplementthemoresophisticatedquanti-tativeanalyticaltechniquesthatmaybeusedtodeterminesulfideconcentration.Thesetestmethodsoffer,totheuser,theoptionandtheabilitytoscreenwasteforpotentiallyhazardouslevelsofreactivesulfidewhenthesophisticatedtechniquesarenotavailableandthetotalwastecompositionisunknown.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardinformationisgiveninSection7and11.3.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWater3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1reactivesulfide—acompoundcontainingsulfidethatreadilyformshydrogensulfidegasuponreactionwithacid.3.1.2screeninganalysis—apreliminaryqualitativeorsemi-quantitativetestdevelopedfromclassicalqualitativeandquantitativetechniquesthatisdesignedtoefficientlygivetheuserparametersaboutawastethatwillaidindeterminingwasteidentification,processcompatibility,andsafetyinhan-dling.4.SummaryofTestMethods4.1MethodA:LeadAcetatePaper—Asampleofwastematerialisacidified.Ifsulfidesarepresentinthewaste,hydrogensu...
