New OSHA Silica Testing Requirement in Effect. New Rule ...
What''s New in the OSHA Silica Standard? Previously the Permissible Exposure Level (PEL) for respirable silica was 100 µg/m 3 for an 8hour time weighted average (TWA). The new OSHA Silica standard establishes an 8hr TWA PEL of 50 µg/m 3, half the old PEL, so it''s no wonder contractors are concerned and calling for silica air addition to testing requirements, "all ...