Report of an Industrial Hygiene Survey of Sand and Gravel Crusher, Dworshak Dam, in Orofino, Idaho.
NIOSH 1968 Jul:16 pages
Potential dust and noise hazards were evaluated in the work environment at the Dworshak Dam (SIC-3281) in Orofino, Idaho, during and industrial hygiene survey on June 12 to 14 1968. The survey was requested by the District Engineer, Walla Walla District, U.S. Army Corps of Engineers. The percentage of free silica (7631869) in dust samples was 20 to 20.3 and respirable airborne dust concentrations ranged from 0 to 5.9 milligrams per cubic meter (mg/m3). Noise levels ranged from 101 to 105 decibels. The author concludes that a health hazard existed. He recommends engineering controls, improved ventilation to reduce dust exposures to below 0.5mg/m3, and the use of hearing protective devices for workers exposed to high noise levels.
NIOSH-Author; NIOSH-Survey; Field-Study; IWS-30-24; Region-10; Silicates; Air-contamination; Industrial-noise; Health-hazards; Workplace-studies; Dust-sampling; Respirable-dust; Pulmonary-system-disorders; Environmental-engineering; Occupational-exposure;
U.S. Public Health Service, Occupational Health Program, Occupational Health Field Station, Salt Lake City, Utah, 16 pages