Figure 3-8. Respirable quartz: Geometric mean exposures by state, OSHA samples, 1979–2003 |
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PEL - permissible exposure limitmg/m3 - milligrams per cubic meterOSHA - Occupational Safety and Health Administration |
Note: Before March 1, 1989 and after March 22, 1993, the OSHA PEL is [(10 mg/m3) /(% quartz + 2)] for respirable dust containing at least 1 percent quartz. From March 1, 1989 to March 22, 1993, the OSHA PEL was 0.1 mg/m3 for respirable quartz. See appendices |
Source: OSHA Integrated Management Information System. |
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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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