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Respirable quartz: Geometric mean exposures and percent exceeding designated occupational exposure limits by MSHA metal/nonmetal mine district and state, MSHA samples, 1979-1999

Respirable quartz:  Geometric mean exposures and percent exceeding designated occupational exposure limits by MSHA metal/nonmetal mine district and state, MSHA samples, 1979-1999

- indicates incalcuable field
PEL - permissible exposure limit    REL - recommended exposure limit    GM - geometric mean

Note: For metal/nonmetal mining, the MSHA PEL is [(10 mg/m3) / (% quartz+2)] for respirable dust containing at least 1 percent quartz. The NIOSH REL is 0.05 mg/m3. See appendices for source description, methods, and agents.

Source: Mine Safety and Health Administration (MSHA) metal/nonmetal mine data.

Citation:

NIOSH 2003. Work-Related Lung Disease Surveillance System (eWoRLD). 2003-70 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/70> December 15, 2017.

Reference Number: 2003-70

Date Posted: May 2003

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