Objective data means information such as air monitoring data from industry-wide surveys or calculations based on the composition or chemical and physical properties of a substance demonstrating the employee exposure to chromium (VI) associated with a particular product or material or a specific process, operation, or activity. Historical monitoring data means data from chromium (VI) monitoring conducted prior to May 30, 2006, obtained during work operations conducted under workplace conditions closely resembling the processes, types of material, control methods, work practices, and environmental conditions in the employer's current operations. 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 or larger. If an incidental release of chromium (VI) can be controlled at the time of release by employees in the immediate release area, or by maintenance personnel, it is not an emergency.Įmployee exposure means the exposure to airborne chromium (VI) that would occur if the employee were not using a respirator. Department of Health and Human Services, or designee.Įmergency means any occurrence that results, or is likely to result, in an uncontrolled release of chromium (VI). Department of Labor, or designee.Ĭhromium (VI) means chromium with a valence of positive six, in any form and in any compound.ĭirector means the Director of the National Institute for Occupational Safety and Health (NIOSH), U.S. For the purposes of this section the following definitions apply:Īction level means a concentration of airborne chromium (VI) of 2.5 micrograms per cubic meter of air (2.5 µgm/mģ) calculated as an 8-hour time-weighted average (TWA).Īssistant Secretary means the Assistant Secretary of Labor for Occupational Safety and Health, U.S. (4) Where the employer has objective data demonstrating that a material containing chromium or a specific process, operation, or activity involving chromium cannot release dusts, fumes, or mists of chromium (VI) in concentrations at or above 0.5 µgm/mģ as an 8-hour time-weighted average (TWA) under any expected conditions of use. (2) Exposures that occur in the application of pesticides regulated by the Environmental Protection Agency or another Federal government agency (e.g., the treatment of wood with preservatives) (1) This standard applies to occupational exposures to chromium (VI) in all forms and compounds in general industry, except:
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