Text For Citation: 01 Item/Group: 003A Hazard:

29 CFR 1910.1053(c):The employer did not ensure that no employee was exposed to an airborne concentration of respirable crystalline silica in excess of 50 ug/m3, calculated as an 8-hour TWA: a) C/D Degating Area; On or about August 10, 2023, and at times prior, the employer exposed an employee to respirable crystalline silica hazards, in that the employer does not ensure employees are not exposed to an airborne concentration of respirable silica in excess of 50 ug/m3, calculated as an 8-hour TWA while an employee was hammering castings and was exposed to an 8-hour time-weighted average concentration of respirable crystalline silica at 150.0 micrograms per cubic meter of air (mcg/m), 2.99 times the permissible exposure limit (PEL) of 50 mcg/m. The sampling was performed during one shift on September 13, 2023 for 480 minutes. b) Cell-19 Area; On or about August 10, 2023, and at times prior, the employer exposed an employee to respirable crystalline silica hazards, in that the employer does not ensure employees are not exposed to an airborne concentration of respirable silica in excess of 50 ug/m3, calculated as an 8-hour TWA while an employee was hammering or inspecting castings and was exposed to an 8-hour time-weighted average concentration of respirable crystalline silica at 110.0 micrograms per cubic meter of air (mcg/m), 2.3 times the permissible exposure limit (PEL) of 50 mcg/m. The sampling was performed during one shift on September 13, 2023 for 480 minutes. c) C/D Degating Area; On or about August 10, 2023, and at times prior, the employer exposed an employee to respirable crystalline silica hazards, in that the employer does not ensure employees are not exposed to an airborne concentration of respirable silica in excess of 50 ug/m3, calculated as an 8-hour TWA while an employee was hammering castings and was exposed to an 8-hour time-weighted average concentration of respirable crystalline silica at 120.0 micrograms per cubic meter of air (mcg/m), 2.40 times the permissible exposure limit (PEL) of 50 mcg/m. The sampling was performed during one overnight shift from October 23-24, 2023 for 480 minutes.