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Health hazard evaluation report: HETA-93-0797-2624, Nicks Silica Company, Jackson, Tennessee.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, HETA 93-0797-2624, 1997 Jan; :1-33
In response to a request from the Mine Safety and Health Administration, an investigation was begun into the prevalence of silicosis at specific ground silica (14808607) operations by conducting a medical evaluation of active and retired miners. This investigation centered around Nicks Silica Company (SIC-1446), Jackson, Tennessee. The study population included workers with 1 year or greater cumulative tenure subsequent to the opening of the mill in the grinding area or in areas downstream of the grinding process. A medical survey was conducted which included a questionnaire, spirometry, and a single view posterior/anterior (PA) chest X-ray. None of the 12 current and former workers participating in the survey had changes on their chest X-ray consistent with silicosis. One participant showed an abnormal spirometry pattern. Three reported chronic respiratory symptoms. All four participants with positive findings were current cigarette smokers. Because of the long latency usually associated with chronic nodular silicosis, the finding is not sufficient to conclude that current silica dust exposures are without any adverse effect. The author recommends that the medical monitoring program be modified to include classification of chest X-rays by a B-reader.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-93-0797-2624; Hazard-Confirmed; Region-4; Mining-industry; Milling-industry; Silica-dusts; Mineral-dusts; Chest-X-rays; Respiratory-system-disorders; Lung-disease; Author Keywords: Industrial Sand; Silica; Silicosis; Mineral processing; Ground silica; Silica flour
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