Pneumoconiotic agents: Percent of exposures exceeding designated occupational exposure limits by MSHA coal mine district and states, MSHA inspector and mine operator samples, 1979–2003 |
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- indicates incalculable field.PEL - permissible exposure limitREL - recommended exposure limitMSHA - Mine Safety and Health Administration |
Note: The NIOSH REL for respirable coal mine dust of 1.0 mg/m3 was adopted in September 1995. The MSHA respirable coal mine quartz exposure data and the NIOSH REL for respirable quartz cannot be compared to each other because they are based on different sampling criteria. See appendices for source description, methods, and agents. |
Source: MSHA coal mine inspector and mine operator dust and quartz data. |
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Page last modified: June 23, 2008
Page last reviewed: June 23, 2008
Content Source: National Institute for Occupational Safety and Health (NIOSH)
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