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Health hazard evaluation report: HETA-82-174-1298, Pacer Corporation, Custer, South Dakota.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 82-174-1298, 1983 Apr; :1-31
Environmental samples were analyzed for respirable crystalline silica (14808607) at Pacer Corporation (SIC-1493), Custer, South Dakota, in January and May 1982. The survey was requested by the Mine Safety and Health Administration, on behalf of the workers because of the incidence of silicosis among former employees. Raw materials, final products, settled dust, and breathing zone samples were analyzed for respirable crystalline silica. Medical tests including chest X-rays and breathing tests were performed and smoking history questionnaires were completed. Present and former workers were included. Quartz was the only form of crystalline silica identified. Respirable dust containing quartz exposures exceeded Mine Safety and Health Administration standards in 38 percent of the samples. The particles less than 10 microns in diameter comprised from 23 to 46 percent of the samples. Silicosis was found in four workers with less than 5 years of exposure. Two of these developed massive fibrosis. The prevalence rate of pneumoconiosis was 12 percent. The authors conclude that high concentrations of respirable quartz are the cause of accelerated silicosis in workers. It is recommended that engineering controls be instituted to reduce exposure.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; Hazard-Confirmed; Region-8; Disease-incidence; Employee-exposure; Dust-inhalation; Dust-exposure; HETA-82-174-1298; Author Keywords: milling; mica; feldspar; silicosis
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division