Work-Related Lung Disease Surveillance System (eWoRLD)
Respirable coal mine dust: Geometric mean exposures and percent exceeding designated occupational exposure limits by type of facility, MSHA inspector and mine operator samples, 1979-1999
- indicates incalculable field
PEL - permissible exposure limitREL - recommended exposure limitGM - geometric mean
Note: In coal mining, for respirable dust containing less than 5% quartz, the MSHA PEL is 2 mg/m3 MRE; for respirable dust containing greater than 5% quartz, the MSHA PEL is [(10 mg/m3 MRE) / (% quartz)]. The NIOSH REL of 1 mg/m3 MRE for respirable coal mine dust was adopted in September of 1995. Geometric means are reported in MRE equivalent. All samples are compared to the MSHA PEL of 2 mg/m3 MRE for respirable coal mine dust containing less than 5% quartz, regardless of actual quartz content. See appendices for source description, methods, and agents.
Source: Mine Safety and Health Administration (MSHA) coal mine inspector and mine operator dust data.
Reference Number: 2002T02-14
Date Posted: May 2003
- Centers for Disease Control and Prevention
- National Institute for Occupational Safety and Health (NIOSH)
- 800-CDC-INFO (800-232-4636) TTY: (888) 232-6348
24 Hours/Every Day