Respirable quartz: Geometric mean exposures and percent exceeding designated occupational exposure limits by OSHA region and state, OSHA samples, 1979–2003 |
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- indicates incalculable field.PEL - permissible exposure limitREL - recommended exposure limitGM - geometric meanmg/m3 - milligrams per cubic meter
OSHA - 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. The NIOSH REL is 0.05mg/m3. See appendices for source description and mehtods. |
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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