Designation:C1121/C1121M−04(Reapproved2015)StandardTestMethodforTurnerandNewall(TandN)Wet-LengthClassificationofAsbestos1ThisstandardisissuedunderthefixeddesignationC1121/C1121M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoverstheoperationoftheTurnerandNewall(TandN)wetsievingclassifierforasbestos,2andaprocedureforthedeterminationoffiberlengthdistributionandfines(definedinTerminologyD2946)contentofmilledasbes-tosfiber(−74µm[200mesh])sievedescribedinSpecificationE11.1.2Forpurposesofestimatinglengthdistribution,thetestislimitedtosamplesfreefromexcessivequantitiesofnon-fibrousparticlesorcontaminants.Quantitiesexceeding0.05gretainedinanygivenlengthfractionsareconsideredexcessive.1.3Forcomparisonsbetweendifferentfibergrades,onlythosespecimenswhichhaveapproximatelythesamedegreeoffiberizationasdeterminedbyTestMethodsD2752/D2752Mwillgivecompletelymeaningfulresults.1.4Thistestmethodisnotapplicabletoultrafinegradesofasbestospowderswhichcontainlittleornofibersretainedona74-µm[200mesh]sieve.ThismethodisrestrictedtoQuebecStandard3grades4Ato7DinclusiveasdeterminedbyTestMethodD3639/D3639M.NOTE1—ThisisanalternativeproceduretoTestMethodD2589/D2589M.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.6Warning—Breathingofasbestosdustishazardous.Asbestosandasbestosproductspresentdemonstratedhealthrisksforusersandforthosewithwhomtheycomeintocontact.Inadditiontootherprecautions,whenworkingwithasbestos-cementproducts,minimizethedustthatresults.Forinforma-tiononthesafeuseofchrysoltileasbestos,referto“SafeUseofChrysotileAsbestos:AManua...
