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Health hazard evaluation report: HETA-93-0794-2621, Unimin Specialty Minerals, Inc. - Tamms, Tamms, 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 93-0794-2621, 1997 Jan; :1-40
In response to a request from the Mine Safety and Health Administration, an estimation was made of the prevalence of silicosis in active and retired miners at Unimin Specialty Minerals, Inc. - Tamms (SIC-1446), in Tamms, Illinois. This facility surface mined and processes microcrystalline quartz (14808607). A group of current and former workers participate in the NIOSH medical survey and of these, 17% had a chest X-ray consistent with silicosis. Four participants, all former workers, had a chest X-ray consistent with progressive massive fibrosis. Two had "A" size large opacities, one had "B" size large opacities, and one had large opacities without a consensus on size. None of the 13 participating current workers employed 10 years or less had a positive chest X-ray. Pulmonary function tests revealed that nine of the 28 participants who performed spirometry had abnormal patterns. Four of the five participants with a positive chest X-ray had abnormal pulmonary function test results, with three exhibiting an obstructive pattern and one a combined restrictive and obstructive pattern. The author recommended that the frequency of medical monitoring examinations be increased.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-93-0794-2621; Hazard-Confirmed; Region-5; Respiratory-system-disorders; Lung-function; Pulmonary-function-tests; Occupational-exposure; Mining-industry; Chest-X-rays; Underground-mining; 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