When used indoors or in an enclosed area Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions: (ii) Handheld power saws (any blade diameter) Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions Use saw equipped with integrated water delivery system that continuously feeds water to the blade Required respiratory protection and minimum assigned protection factor (APF) Table 1-Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica Equipment/taskĮngineering and work practice control methods 1153.įor 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, unless the employer assesses and limits the exposure of the employee to respirable crystalline silica in accordance with paragraph (d) of this section. This section means this respirable crystalline silica standard. Specialist means an American Board Certified Specialist in Pulmonary Disease or an American Board Certified Specialist in Occupational Medicine. Respirable crystalline silica means quartz, cristobalite, and/or tridymite contained in airborne particles that are determined to be respirable by a sampling device designed to meet the characteristics for respirable-particle-size-selective samplers specified in the International Organization for Standardization (ISO) 7708:1995: Air Quality-Particle Size Fraction Definitions for Health-Related Sampling.
Personal breathing zone samples professional#
Physician or other licensed health care professional means an individual whose legally permitted scope of practice (i.e., license, registration, or certification) allows him or her to independently provide or be delegated the responsibility to provide some or all of the particular health care services required by paragraph (h) of this section. The data must reflect workplace conditions closely resembling or with a higher exposure potential than the processes, types of material, control methods, work practices, and environmental conditions in the employer's current operations. Objective data means information, such as air monitoring data from industry-wide surveys or calculations based on the composition of a substance, demonstrating employee exposure to respirable crystalline silica associated with a particular product or material or a specific process, task, or activity. High-efficiency particulate air filter means a filter that is at least 99.97 percent efficient in removing mono-dispersed particles of 0.3 micrometers in diameter. Employee exposure means the exposure to airborne respirable crystalline silica that would occur if the employee were not using a respirator. The competent person must have the knowledge and ability necessary to fulfill the responsibilities set forth in paragraph (g) of this section. Competent person means an individual who is capable of identifying existing and foreseeable respirable crystalline silica hazards in the workplace and who has authorization to take prompt corrective measures to eliminate or minimize them. Department of Health and Human Services, or designee.
Director means the Director of the National Institute for Occupational Safety and Health (NIOSH), U.S.
Assistant Secretary means the Assistant Secretary of Labor for Occupational Safety and Health, U.S. For the purposes of this section the following definitions apply: Action level means a concentration of airborne respirable crystalline silica of 25 μg/m 3, calculated as an 8-hour TWA.
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