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Health hazard evaluation determination report: HHE-78-50(A-B-C)-517, Colorado Ute Electric Association, Hayden, NICLA, and Montrose, Colorado, August 1978.
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HHE 78-50(A-B-C)-517, 1978 Aug; :1-14
Environmental and medical surveys were conducted from March 21 to 23, 1978, to evaluate potential exposures to coal dust during the operation and maintenance of power facilities of the Colorado Ute Electric Association (SIC-4911) in Hayden, Nucla, and Montrose, Colorado. The evaluation was requested by a representative of the International Brotherhood of Electrical Workers, Local 111, on behalf of approximately 80 affected employees. At the Hayden facility, excessive concentrations of crystalline silica (14808607), ranging from 0.0 to 0.06 milligrams per cubic meter (mg/m3) exceeded the OSHA standard of 10 milligrams per meter divided by the percentage of respirable quartz plus 2. Total coal dust concentrations also exceeded the 2.0mg/m3 OSHA standard at the Hayden facility. Concentrations of crystalline silica total coal dust, and fly ash, at the Nucla facility exceeded OSHA standards (fly ash standard was 15mg/m3). At the Montrose facility, concentrations of crystalline silica and respirable and total coal dust exceeded OSHA standards. The author concludes that a health hazard did exist at the three facilities, although the workers at the Hayden facility were adequately protected by respirators. The author recommends that respirators and a respirator program be initiated at the Nucla and Montrose facilities, that periodic coal dust monitoring be performed at all facilities, and that workers receiving dust exposures be periodically examined and X-rayed.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; Hazard-Confirmed; Region-8; Coal-dust; Fly-ash; Silica-dusts; Occupational-exposure; Humans; Medical-examinations; Electric-power-generation; Respiratory-protective-equipment; Author Keywords: Crystalline Silica; Quartz; Cristobalite; Respirable Coal Dust; Total Coal Dust; Fly Ash; Power Plants
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division