OSHA Silica Rule Natural Stone Institute
OSHA Silica Rule OSHA Releases Final Silica Ruling. OSHA released its longanticipated rule reducing the permissible exposure level (PEL) for crystalline silica for general industry and construction. The rule cuts the respirable silica PEL from 100 µg/m 3 for an 8hour time weighted average to 50 µg/m 3. The rule was broken into two separate ...