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

29 CFR 1910.1053(d)(3)(i): The employer did not perform initial monitoring to assess the 8-hour TWA exposure for each employee on the basis of one or more personal breathing zone air samples that reflect the exposures of employees on each shift, for each job classification, in each work area: a) Manual cutting and polishing area; On or about May 1, 2024, and at times prior thereto, the employer failed to assess the employee wet and dry cutting and polishing, natural and manufactured stone countertops to determine their 8-hour TWA exposure. An employee wet and dry cutting and polishing, natural and manufactured stone countertops was exposed to respirable crystalline silica hazards at 193.18 micrograms per cubic meter which is approximately 3.86 times the permissible exposure level (PEL) of 50 micrograms per cubic meter. Results were based on a 346-minute sampling period with zero exposure used for the 134 minutes not sampled. b) Manual cutting and polishing area; On or about May 1, 2024, and at times prior thereto, the employer failed to assess the employee wet and dry cutting and polishing, natural and manufactured stone countertops to determine their 8-hour TWA exposure. An employee wet and dry cutting and polishing, natural and manufactured stone countertops was exposed to respirable crystalline silica hazards at 111 micrograms per cubic meter which is approximately 2.22 times the permissible exposure level (PEL) of 50 micrograms per cubic meter. Results were based on a 486-minute sampling period. c) Manual cutting and polishing area; On or about May 1, 2024, and at times prior thereto, the employer failed to assess the employee wet and dry cutting and polishing, natural and manufactured stone countertops to determine their 8-hour TWA exposure. An employee wet and dry cutting and polishing, natural and manufactured stone countertops was exposed to respirable crystalline silica hazards at 139.7 micrograms per cubic meter which is approximately 2.79 times the permissible exposure level (PEL) of 50 micrograms per cubic meter. Results were based on a 409-minute sampling period with zero exposure used for the 71 minutes not sampled.