1、Designation:D788614(Reapproved 2019)1Standard Practice forAsbestos Exposure Assessments for RepetitiveMaintenance and Installation Tasks1This standard is issued under the fixed designation D7886;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、 revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEReapproved with editorial changes to Sections 2 and 3 in November 2019.1.Scope1.1 This practice establishes
3、 procedures for assessing theexposure of workers to airborne fibers who perform repetitivetasks of short duration where small quantities of asbestos-containing materials must be disturbed in order to performmaintenance and installation activities.1.2 This practice describes the facilities and equipm
4、ent forperforming the tasks under controlled conditions for theexpress purpose of collecting personal air samples to determineworker exposure.The tasks are performed on actual asbestos-containing materials during Exposure Assessment tests andprecautions are taken for personal protection and avoiding
5、contamination of adjacent spaces.1.3 This practice describes the air sample collectionprocedures,the analytical methods for the air samples,and thecalculation of worker exposure including the use of statisticalconfidence limits.This practice differentiates between the testto obtain exposure data and
6、 the current job to which the dataare applied,and describes the duties of the individuals whoconduct these separate activities.1.4 The results are applied to the current job as definedherein for determining worker protection such as respiratoryprotection or for other purposes as determined by the co
7、mpe-tent person responsible for the current job.The results of thetests shall not be applied to current jobs that are expected todiffer substantially from the test conditions in work practices,material properties or other factors that might affect theconcentration of airborne asbestos fibers.1.5 Thi
8、s practice is not intended to be used for asbestosabatement work for which the objective is the removal ofasbestos-containing materials.It is designed to assess expo-sures for short-term repetitive tasks.Compliance with regula-tory requirements as to the purpose of the work and limits onthe quantity
9、 of asbestos-containing materials disturbed is theresponsibility of the user.1.6 This practice describes procedures for determining ex-posure to airborne asbestos fibers.It does not purport todetermine the risk of acquiring an asbestos-related disease forany individual,trade or work practice,nor doe
10、s it represent thatcompliance with any criterion constitutes a“safe”level ofexposure that is free of such risk.1.7 HazardsAsbestos fibers are acknowledged carcino-gens.Breathing asbestos fibers may result in disease of thelungs including asbestosis,lung cancer,and mesothelioma.Precautions should be
11、taken to avoid breathing airborneasbestos particles from materials known or suspected tocontain asbestos.See 2.2 for regulatory requirements address-ing asbestos.1.8 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound
12、units that are provided for informa-tion only and are not considered standard.1.9 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practice
13、s and deter-mine the applicability of regulatory limitations prior to use.1.10 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Re
14、com-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2E1368 Practice for Visual Inspection of Asbestos AbatementProjects1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct res
15、ponsibility of Subcommittee D22.07 on Sampling,Analysis,Management of Asbestos,and Other Microscopic Particles.Current edition approved Nov.1,2019.Published January 2020.Originallyapproved in 2014.Last previous edition approved in 2014 as D7886 14.DOI:10.1520/D7886-14R19E01.2For referenced ASTM stan
16、dards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of I
