ASTM_D_7390_-_18e1.pdf

Designation:D7390181Standard Guide forEvaluating Asbestos in Dust on Surfaces by ComparisonBetween Two Environments1This standard is issued under the fixed designation D7390;the number immediately following the designation indicates the year oforiginal adoption or,in the case of 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.1NOTEEditorial corrections were made throughout in October 2018.1.Scope1.1 There are multiple purposes for determining the loadingof asbestos in dust on surfaces.Each particular purpose mayrequire unique sampling strategies,analytical methods,andprocedures for data interpretation.Procedures are provided tofacilitate application of available methods for determiningasbestos surface loadings and/or asbestos loadings in surfacedust for comparison between two environments.At present,this guide addresses one application of the ASTM surface dustmethods.It is anticipated that additional areas will be added inthe future.It is not intended that the discussion of oneapplication should limit use of the methods in other areas.1.2 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 practices and deter-mine the applicability of regulatory limitations prior to use.For specific warning statements,see 5.7.1.3 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 Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D5755 Test Method for Microvacuum Sampling and IndirectAnalysis of Dust by Transmission Electron Microscopyfor Asbestos Structure Number Surface LoadingD6480 Test Method for Wipe Sampling of Surfaces,IndirectPreparation,and Analysis for Asbestos Structure NumberSurface Loading by Transmission Electron MicroscopyE456 Terminology Relating to Quality and StatisticsE2356 Practice for Comprehensive Building Asbestos Sur-veys3.Terminology3.1 DefinitionsUnless otherwise noted all statistical termsare as defined in Terminology E456.3.1.1 activity generated aerosol,na dispersion of particlesin air that have become airborne due to physical disturbancessuch as human activity,sweeping,airflow,etc.3.1.2 background samples,nsamples taken from surfacesthat are considered to have concentrations of asbestos insurface dust that are representative of conditions that exist in anenvironment that is affected by only prevailing conditions andhas not experienced events,disturbances or activities unusualfor the environment.3.1.3 control,nan area that is used as the basis for acomparison.3.1.3.1 DiscussionThis could be an area where the dusthas been previously characterized,an area thought to besuitable for occupancy,an area that has not experienced adisturbance of asbestos-containing materials,or that is forsome other reason deemed to be suitable as the basis for acomparison.3.1.4 control samples,nsamples collected for comparisonto the study samples.3.1.4.1 DiscussionThese differ from background samplesin that they are collected:either:in an area where the dust hasbeen previously characterized,or in an area that has notexperienced a disturbance of asbestos-containing materials,orin an area that is for some other reason deemed to be suitableas the basis for comparison.3.1.5 dust,nany material composed of particles in a sizerange of 0,(CHIINV(0.975,2N)/2),0)for the 95%LCL and(IF(N0,(CHIINV(0.025,2(N+1)/2),(CHIINV(0.05,2)/2)for the 95%UCL.7.3.1 The 95%LCL and 95%UCL in Table 1 refer to thenumber of structures at these limits,not the surface loading,which is calculated from the analytical parameters as shown inthe examples.7.3.2 The following terms are used in the tables in theexamples.All of the Analytical Parameters should be in thelaboratory report or available from the laboratory.(See also3.1,Definitions.)7.3.2.1 Effective filter area is the area of the filter on whichthe rinse solution aliquot is deposited for TEM analysis.It isnot the area of the filter in the sample collection cassette,whichis not analyzed.7.3.2.2 Sample area is the area of the surface sampled by theuser and is assumed to be 100 cm unless the user specifiesotherwise.It may vary for different samples.7.3.2.3 Volume filtered is the volume of the rinse solutionaliquot deposited on the filter for TEM analysis.It may vary fordifferent samples.7.3.2.4 Analytical Sensitivity is the surface loading calcu-lated on the basis of finding one structure in the sample and isa function of the analytical parameters.It may vary fordifferent samples.7.3.2.5 Number of Structures is the total number counted inall grid openings for