Figure 3-7. Respirable quartz: Geometric mean metal/nonmetal mining exposures by state, MSHA samples, 1979–2003 |
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mg/m3 - milligrams per cubic meterMSHA - Mine Safety and Health Administration |
Note: See appendices for source description, methods, and agents. |
Source: MSHA metal/nonmetal mine 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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