Text For Citation: 02 Item/Group: 001A Hazard:

29 CFR 1926.1153(c)(1): For each employee engaged in a task identified on Table 1, the employer did not fully and properly implement the engineering controls, work practices, and respiratory protection specified for the task on Table 1: a) Location: Mountain Gate Apartments - 7501 S. Utica Dr., Littleton, CO 80128. On or about July 16, 2024, and at times prior, the employer, Centennial Concrete & Waterproofing LLC, did not ensure engineering controls listed in Table 1 were implemented during dry concrete grinding operations for uses other than mortar removal and for a working time period of greater than 4 hours. Employees were required to grind dry concrete surfaces in an enclosed area with a 7-inch Makita powered grinder. The employer did not ensure the Makita grinder was equipped with a grinding wheel or blade shroud as well as a dust collection system that provided 25 cubic feet per minute (cfm) or greater of airflow per inch of grinding wheel diameter, a filter with 99% or greater efficiency, and a cyclonic pre-separator or filter-cleaning mechanism. This condition exposed employees to respirable crystalline silica. Centennial Concrete & Waterproofing LLC was previously cited for a violation of this occupational safety and health standard, which was contained in OSHA Inspection 1705321, Citation 1, Item 3a, which was affirmed as a final order on May 2, 2024, with respect to the workplace located at 5105 DTC Pkwy. Greenwood Village, CO 80111.