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Specified Exposure Control Methods:For each employee engaged in a task identified on Table 1, the employer shall fully and properly implement the engineering controls, work practices, and respiratory protection specified for the task on Table 1.

Performance option:The employer shall assess the 8-hour Time-Weighted Average (TWA) exposure for each employee on the basis of any combination of air monitoring data or objective data sufficient to accurately characterize employee exposures to respirable crystalline silica.

相关文件:

• Objective Test Data for Concrete Drilling with XRH03Z, XRH04Z, XRH06Z, RH01, HR2475 and HR2811F (PDF)DOWNLOAD
• Objective Test Data for Concrete Drilling with XRH011TX, XRH05Z, HR2641, HR2651 and HR2661 (PDF)DOWNLOAD
• Objective Test Data for Concrete Surfacing/Grinding with VC4710, using GA7011C, GA7040S and GA9040S (PDF)DOWNLOAD

Scheduled Self-Monitoring:If a control method is not listed on Table 1 and no objective data is available, OSHA requires employers implement a monitoring program to show that the employees have exposure levels below the PEL. The employer shall 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.