Selected pneumoconiotic agents: Geometric mean exposures and percent exceeding designated occupational exposure limits, MSHA and OSHA samples, 1979-2003
- indicates incalculable field. PEL - permissible exposure limit REL - recommended exposure limit GM
Note: Pneumoconiotic agents with at least 300 total samples in MSHA or OSHA for the time period 1979-2003 are presented. From March 1, 1989 to March 22, 1993, the OSHA PELs in force differed from those employed before and after those dates. NIOSH has designat
Source: MSHA metal/nonmetal mine data. OSHA Integrated Management Information System.
Reference Number: 2008-734
Date Posted: June 2008