Text For Citation: 01 Item/Group: 005 Hazard:

29 CFR 1910.1053(d)(1): The employer did not assess the exposure of each employee who was or may reasonably be expected to be exposed to respirable crystalline silica at or above the action level in accordance with either the performance option in paragraph (d)(2) or the scheduled monitoring option in paragraph (d)(3) of this section: a) Baja Design, Inc., 1285 South Kalamath Street, Denver CO: On March 25, 2024, and at times prior, employees were exposed to airborne crystalline silica exceeding the action limit of 25 micrograms per cubic meter of air while manufacturing cultured and natural stone countertops. Personal air sampling performed for 184 minutes indicated an exposure at a concentration of 47.5 micrograms per cubic meter of air, approximately 1.9 times the action limit. The exposures are based on an 8-hour time weighted average sampling period; exposure calculations included zero-increment for the 296 minutes not sampled. b) Baja Design, Inc., 1285 South Kalamath Street, Denver CO: On March 26, 2024, and at times prior, employees were exposed to airborne crystalline silica exceeding the action limit of 25 micrograms per cubic meter of air while manufacturing cultured and natural stone countertops. Personal air sampling performed for 281 minutes indicated an exposure at a concentration of 36.29 micrograms per cubic meter of air, approximately 1.45 times the action limit. The exposures are based on an 8-hour time weighted average sampling period; exposure calculations included zero-increment for the 199 minutes not sampled. c) Baja Design, Inc., 1285 South Kalamath Street, Denver CO: On March 28, 2024, and at times prior, employees were exposed to airborne crystalline silica exceeding the action limit of 25 micrograms per cubic meter of air while manufacturing cultured and natural stone countertops. Personal air sampling performed for 225 minutes indicated an exposure at a concentration of 29.53 micrograms per cubic meter of air, approximately 1.18 times the action limit. The exposures are based on an 8-hour time weighted average sampling period; exposure calculations included zero-increment for the 255 minutes not sampled.