Text For Citation: 01 Item/Group: 011 Hazard:

29 CFR 1910.1053(f)(1): The employer did not use engineering and work practice controls to reduce and maintain employee exposure to respirable crystalline silica to or below the PEL, unless the employer can demonstrate that such controls are not feasible: a) Production: On or about November 19, 2024 and at times prior, the employer exposed employees to respiratory hazards, in that a polisher tasked with polishing stone countertops without proper ventilation was exposed to Respirable Crystalline Silica at an 8-hour TWA of 126.3 �g/m3. This level exceeded the Permissible Exposure Limit for RCS (50 �g/m3). The exposure was derived from a sample collected for a 456-minute sampling period. Exposure calculations included a zero increment for the time not sampled. b) Production: On or about November 19, 2024 and at times prior, the employer exposed employees to respiratory hazards, in that a polisher tasked with polishing stone countertops was exposed to Respirable Crystalline Silica at an 8-hour TWA of 62.0 �g/m3. This level exceeded the Permissible Exposure Limit for RCS at 50 �g/m3. The exposure was derived from a sample collected for a 476-minute sampling period. Exposure calculations included a zero increment for the time not sampled. c) Production: On or about November 19, 2024 and at times prior, the employer exposed employees to respiratory hazards, in that a a fabricator tasked with cutting stone countertops was exposed to Respirable Crystalline Silica at an 8-hour TWA of 278.2 �g/m3. This level exceeded the Permissible Exposure Limit for RCS at 50 �g/m3. The exposure was derived from a sample collected for a 480-minute sampling period. Exposure calculations included a zero increment for the time not sampled. d) Production: On or about November 19, 2024 and at times prior, the employer exposed employees to respiratory hazards, in that a polisher tasked with polishing stone countertops was exposed to Respirable Crystalline Silica at an 8-hour TWA of 132.2 �g/m3. This level exceeded the Permissible Exposure Limit for RCS which is 50 �g/m3. The exposure was derived from a sample collected for a 464-minute sampling period. Exposure calculations included a zero increment for the time not sampled. e) Production: On or about November 19, 2024 and at times prior, the employer exposed employees to respiratory hazards, in that a fabricator tasked with cutting stone countertops was exposed to Respirable Crystalline Silica at an 8-hour TWA of 518.1 �g/m3. This level exceeded the Permissible Exposure Limit for RCS (50 �g/m3). The exposure was derived from samples collected for a 416-minute sampling period. Exposure calculations included a zero increment for the time not sampled.