Review of the U.S. Navy's Exposure Standard for Manufactured Vitreous Fibers (2000) / Chapter Skim
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3 Sampling, Analytical Methods, and Exposure Assessment
3 Sampling, Analytical Methods, and Exposure Assessment
Pages 18-22
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From page 18... ...
analytical methods, 0500 and 0600 (NTOSH 1994) , cited in the Navy's review, for otherwise unregulated total and respirable particles, respectively, are not directly applicable to MVF without modification.
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From page 19... ...
in the section on gravimetric analysis appears to be misplaced, in that electron microscopy is more applicable to fiber counting than to mass measurement. A better example of an alternative means of determining sample mass would be x-ray fluorescence analysis based on the metal content of the MVF.
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From page 20... ...
The Navy documentation of monitoring data on worker exposures to MVF during manufacturing and use is important for linking exposures to the results of epidemiological studies that examined adverse effects of such exposures. At the same time the Navy must clearly determine whether its proposed occupational exposure limits will be protective for its workers.
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From page 21... ...
In addition, installation and removal operations create high dust levels, and there is a need for guidance on the sampling of MVF dusts for analyses of mass concentrations of inhalable particulate matter as a nuisance dust. NIOSH recommends PCOM as an appropriate anal~vtical method for fiber counting of conventional glass fibers, rock and slag wools, and RCF with fiber diameters typically greater than ~ ,um.
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From page 22... ...
For maintenance and removal operations where occupational exposures are likely to include high dust concentrations instead of or in addition to high fiber number concentrations, samplers with inlets that meet the ACGTH-ISO-CEN (American Conference of Governmental Industrial Hygienists-International Standards Organization-Comite Europeen de Normalisation) criteria for inhalable particulate matter should be used, and grav~metric determinations of the dust should be made.
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