Work-Related Lung Disease (WoRLD) Surveillance System

Table 3-20. Respirable quartz: Geometric mean exposures and percent exceeding designated occupational exposure limits by OSHA region and state, OSHA samples, 1979–2003

- indicates incalculable field.PEL - permissible exposure limitREL - recommended exposure limitGM -geometric meanmg/m³ - milligrams per cubic meterOSHA - Occupational Safety and Health Administration

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 percent quartz. From March 1, 1989 to March 22, 1993, the OSHA PEL was 0.1 mg/m3 for respirable quartz. The NIOSH REL i

Source:  OSHA Integrated Management Information System.

Archived Versions:

2002T03-20