Respirable quartz: Geometric mean coal mining exposures by state, MSHA inspector and mine operator samples, 1982-2003
mg/m3 - milligrams per cubic meter MRE - Mining Research Establishment MSHA - Mine Safety and Health Administration
Note: See appendices for source description, methods, and agents.
Source: MSHA coal mine inspector and operator quartz data.
Reference Number: 2008-307
Date Posted: June 2008