Designation:D5951–96(Reapproved2002)StandardPracticeforPreparingResidualSolidsObtainedAfterBiodegradabilityStandardMethodsforPlasticsinSolidWasteforToxicityandCompostQualityTesting1ThisstandardisissuedunderthefixeddesignationD5951;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversastandardprocedureforpreparingtheresidualsolidsobtainedattheendofstandardmethodsforbiodegradabilitytestingofplasticsinsolidwaste,forsubse-quenttoxicityandcompostqualitytesting.Thepracticeyieldsmixturesthatcanbeusedassuchforterrestrialtoxicitytestingorthatcanbesubmittedtowaterextractionforfurtheraquatictoxicitytests,inaccordancewithPracticeD5152,andinconjunctionwithMethodD4229,GuidesE729,E1192,E1295,andE1440,orothercurrentlyacceptedtoxicitytestmethods(seeOECDGuidelines201,202,203,207,and208orU.S.EPA40FR797A,aswellasotherdocumentssuchasANewManualforConductingMicrotoxTestwiththeModel500Analyzer2theworkoncyst-basedtoxicitytestsbyCenteno,etal3).Themixturescanalsobeusedforfurthersoilcontactbiodegradationtesting.1.2Thispracticeprovidesforstorageanddryingofthemixturesobtainedattheendofthetestmethodsfordetermi-nationofthebiodegradabilityofplasticsundercontrolledcompostingconditions(TestMethodD5338),andunderhigh-solidsanaerobicdigestion(TestMethodD5511).Themixturescontainthebiologicallydecomposedresidualsfromsolidwasteandfromtheplasticmaterials.Fortheblanks,theresidualswillbederivedonlyfromthebiologicallydecomposedsolidwaste.Intheeventthataparticularsampledoesnotpassthetoxicitytest,chemicalcharacterizationofthedegradationproductscanbeperformedonthesampletodeterminethesourceofthetoxicity.Descriptionoftheperformanceoftheseanalysesisbeyondthescopeofthispractice.1.3ThereisnoISOstandardthatisequivalenttothispractice.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard....
