Abstract
Occupational quartz exposure data gathered from the Mine Safety and Health Administration's respirable dust enforcement program and a program to monitor quartz exposure in several mining occupations were compiled and analyzed to assess the status of quartz exposures in the coal mining industry. The analysis showed that, in underground mines, a substantial number of samples contained greater than 5% quartz. Occupations that showed a high frequency of excessive quartz exposure included the roof bolter, continuous miner operator, and continuous miner operator helper. In surface coal mines the highwall drill operator and helper, bulldozer operator, scraper operator, and truck driver were frequently exposed to high quartz concentrations.
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