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Technological Feasibility of Controlling Asbestos and Silica at Mines and Mills.

Chen CK; Katt RJ; Kent MB; Hamrick M; Perry WG; Smith D; Spooner C; Moore E
NIOSH 1983 Mar:526 pages
Worker exposures to airborne silica (14808607) dusts and mineral fibers in the mining and milling industries were assessed from samples provided by the Mine Safety and Health Administration (MSHA). A study was conducted for NIOSH which included a compilation of silica dust and mineral fiber exposure data and samples, an evaluation of dust control technologies and their efficiencies, and a feasibility assessment. Sources of samples and companies surveyed are contained in MSHA files. The fiber surveys were conducted between 1973 and 1976. Sixteen mining industry groups were surveyed. Industrial hygiene sampling data from the Mine Inspection Data Analysis System and personal samples were used for the evaluations. Processes commonly used in the mining industry were classified into 14 operational categories. Exposure profiles were used to obtain worst case estimates in each industry for silica and asbestos (1332214) exposures. Literature searches and site visits were conducted. The effectiveness and applicability of methods of dust formation control, paint source control, ambient source control, and worker isolation control were assessed. The feasibility of controlling silica dust and asbestos fiber exposures to the permissible exposure limits was assessed. The authors recommend exposure limits of 0.05 to 0.075 milligrams per cubic meter for silica dust are feasible for all industries surveyed.
NIOSH-Contract; Industrial-hygiene; Dust-inhalation; Mining-industry; Dust-exposure; Sampling-methods; Exposure-levels; Toxicology; Contract-210-81-4104;
14808-60-7; 1332-21-4;
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NIOSH, Public Health Service, U.S. Department of Health and Human Services
Page last reviewed: February 11, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division