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1926.1153 Table 1—Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica Equipment/task Engineering and work practice control methods Required respiratory protection and minimum assigned protection factor (APF) ≤ 4 hours/ shift >4 hours/ shift OR Use machine equipped with dust collection system
TABLE 1: SPECIFIED EXPOSURE CONTROL METHODS WHEN WORKING WITH MATERIALS CONTAINING CRYSTALLINE SILICA† Equipment/Task Engineering and Work Practice Control Methods require? Required Respiratory Protection and Minimum Assigned Protection Factor (APF) What does full and proper implementation ≤ 4 hours /shift > 4 hours /shift
Working With Materials Containing Crystalline Silica Adopted from the Occupational Safety and Health Administration (OSHA) Respirable Crystalline Silica Standard Page
protection described in Table 1: (1) Permissible exposure limit (PEL). The employer shall ensure that no employee is exposed to an airborne concentration of respirable crystalline silica in excess of 50 mg/m3, calculated as an 8-hour TWA. (2) Exposure assessment—(i) General. The employer shall assess the exposure of each employee who is or may
the engineering controls, work practices, and respiratory protection specified for the task on Table 1, unless the employer assesses and limits the exposure of the employee to respirable crystalline silica in accordance with paragraph (d) of this section.
Workers who are exposed to respirable crystalline silica dust are at increased risk of developing serious silica-related diseases. OSHA’s standard requires employers to take steps to protect workers from exposure to respirable crystalline silica. What is Respirable Crystalline Silica? Crystalline silica is a common mineral that is found
Table 1 is a flexible alternative that identifies 18 common construction tasks that generate high exposures to respirable crystalline silica and specifies engineering controls, work practices, and respiratory protection for each task.
