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Respirable quartz: Geometric mean exposures by major industry division, MSHA and OSHA samples, 1979-2003

Respirable quartz: Geometric mean exposures by major industry division, MSHA and OSHA samples, 1979-2003

PEL - permissible exposure limit    REL - recommended exposure limit    mg/m3 - milligrams per cubic meter    MSHA - Mine Safety and Health Administration    OSHA - Occupational Safety and Health Asministration

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% quartz. From March 1, 1989 to March 22, 1993, the OSHA PEL was 0.1 mg/m3 for respirable quartz. For metal/nonmetal mining, the MSHA PEL is [(10 mg/m3) / (% quartz + 2)] for respirable dust containing at least 1% quartz.

See Appendix for more information.

Source:

MSHA metal/nonmetal data

OSHA Integrated Management Information System

Citation:

NIOSH 2008. Work-Related Lung Disease Surveillance System (eWoRLD). 2008-303 U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Respiratory Health Division, Morgantown, WV. Available at: <https://wwwn.cdc.gov/eworld/Data/303> October 21, 2017.

Reference Number: 2008-303

Date Posted: June 2008

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