Designation:D7886−14StandardPracticeforAsbestosExposureAssessmentsforRepetitiveMaintenanceandInstallationTasks1ThisstandardisissuedunderthefixeddesignationD7886;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeestablishesproceduresforassessingtheexposureofworkerstoairbornefiberswhoperformrepetitivetasksofshortdurationwheresmallquantitiesofasbestos-containingmaterialsmustbedisturbedinordertoperformmaintenanceandinstallationactivities.1.2Thispracticedescribesthefacilitiesandequipmentforperformingthetasksundercontrolledconditionsfortheexpresspurposeofcollectingpersonalairsamplestodetermineworkerexposure.Thetasksareperformedonactualasbestos-containingmaterialsduringExposureAssessmenttestsandprecautionsaretakenforpersonalprotectionandavoidingcontaminationofadjacentspaces.1.3Thispracticedescribestheairsamplecollectionprocedures,theanalyticalmethodsfortheairsamples,andthecalculationofworkerexposureincludingtheuseofstatisticalconfidencelimits.Thispracticedifferentiatesbetweenthetesttoobtainexposuredataandthecurrentjobtowhichthedataareapplied,anddescribesthedutiesoftheindividualswhoconducttheseseparateactivities.1.4Theresultsareappliedtothecurrentjobasdefinedhereinfordeterminingworkerprotectionsuchasrespiratoryprotectionorforotherpurposesasdeterminedbythecompe-tentpersonresponsibleforthecurrentjob.Theresultsofthetestsshallnotbeappliedtocurrentjobsthatareexpectedtodiffersubstantiallyfromthetestconditionsinworkpractices,materialpropertiesorotherfactorsthatmightaffecttheconcentrationofairborneasbestosfibers.1.5Thispracticeisnotintendedtobeusedforasbestosabatementworkforwhichtheobjectiveistheremovalofasbestos-containingmaterials.Itisdesignedtoassessexpo-suresforshort-termrepetitivetasks.Compliancewithregula-toryrequirementsastothepurposeoftheworkand...
