New OSHA Regulations on Silica Dust
On September 23, 2017, the Occupational Safety and Health Administration (OSHA) released the final rule for occupational exposure to respirable silica dust. This rule is designed to eliminate the harmful effects of respirable crystalline silica dust to workers in the construction industry. In this rule, OSHA reduced the Permissible Exposure Limit (PEL) from 250µg/cubic meter to 50 µg/cubic meter for an 8-hour Time Weighted Average (TWA). Respirable crystalline silica is produced by the drilling, cutting, and grinding of materials that contain silica. These materials include concrete, stone, slate, tile, asphalt filler, roofing granules, caulking, plaster and many others. Please refer to our new Silica Dust section located in our Industrial Hygiene services tab.