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Silicosis: Respirable Quartz Exposures

Respirable quartz: Number of samples, geometric mean exposures, and percent exceeding designated occupational exposure limits by industry, MSHA inspector and mine operator and OSHA samples, 1993-2003
Table showing Respirable quartz: Number of samples, geometric mean exposures, and percent exceeding designated occupational exposure limits by industry, MSHA inspector and mine operator and OSHA samples, 1993-2003

CIC - Census Industry CodePEL - permissible exposure limitREL - recommended exposure limit GM - ge

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. For coal minin

Source:  MSHA metal/nonmetal and coal mine inspector and mine operator quartz data. OSHA Integrated Management Information System.

Reference Number: 2007T03-17

Date Posted: June 2008

Archived Versions:
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