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Health hazard evaluation report: HETA-93-0793-2645, Unimin Specialty Minerals, Inc., Elco, Elco, Illinois.
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 93-0793-2645, 1997 Jul; :1-36
In response to a request from the Mine Safety and Health Administration, a medical survey of current workers at the Unimin Specialty Minerals Elco (SIC-1446) operation in Illinois was conducted. The primary objective was to estimate and report the prevalence of silicosis among participating current and former employees at the grinding area and/or downstream of the grinding area at each operation by tenure and job. Of the 28 current and former workers who participated in the medical survey, six (21%) had a chest X-ray considered to be consistent with silicosis. The prevalence among current workers was 10%. The highest median International Labour Office (ILO) profusion category was 2/3. Three participants had a chest X-ray consistent with progressive massive fibrosis. Two had "A" size large opacities and one had "C" size large opacities. None who had been working less than 10 years had a positive chest X-ray. The prevalence of silicosis among the group who met the study criterion, yet chose not to participate in the medical survey was 8%. Pulmonary function testing revealed that eight of the 25 participants who performed spirometry had abnormal patterns, and all eight exhibited an obstructive lung pattern. The author recommends that the frequency of medical monitoring examinations be increased.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-93-0793-2645; Hazard-Confirmed; Region-5; Respiratory-system-disorders; Pulmonary-function-tests; Mineral-dusts; Grinding-mills; 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: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division