In 2010, OSHA issued a proposed rule reducing the permissible exposure level (PEL) for crystalline silica for general industry and construction. The proposed rule cut the respirable silica PEL from 100 µg/m3 for an 8-hour time weighted average to 50 µg/m3. After public hearings and public comments were submitted on the proposed rule, OSHA finalized the rule and sent the rule to the Office of Management and Budget (OMB) in December 2015.

On March 22, 2016, OMB completed its review of the rule and a final rule is expected to be published in the Federal Register soon. Additional information from OSHA is expected today and Jackson Lewis will provide updated information when it is available.