![]() ![]() ![]() (2) Any self-contained breathing apparatus with full facepiece.įull-facepiece self-contained breathing apparatus in positive-pressure mode. (2) Full-facepiece positive-pressure supplied-air respirator with auxiliary self-contained air supply. (1) Self-contained breathing apparatus with full facepiece in positive-pressure mode or Benzene (1910.1028)īenzene (1910.1028) Airborne Concentration or Condition of Use * A high-efficiency filter means a filter that is at least 99.97% efficient against mono-dispersed particles of 0.3 µm (micrometers) in diameter or higher. 100 f/cm 3 (1,000 X PEL), or unknown concentrationsįull-facepiece supplied-air respirator operated in pressure-demand mode, equipped with an auxiliary positive-pressure self-contained breathing apparatus. ** A high-efficiency filter means a filter that is at least 99.97% efficient against mono-disperesed particles of 0.3 µm (micrometers) in diameter or higher. * Half-mask respirators shall not be used for protection against arsenic trichloride, as it is rapidly absorbed through the skin. Requirements for Respiratory Protection for Inorganic Arsenicals With Significant Vapor Pressure Airborne Concentration (as As) or Condition of Use Requirements for Respiratory Protection for Inorganic Arsenicals With Significant Vapor Pressure * A high-efficiency filter means a filter that is at least 99.97% efficient against mono-disperesed particles of 0.3 µm (micrometers) in diameter or higher. ![]() 20,000 µg/m 3, unknown concentrations, or firefightingĪny full-facepiece self-contained breathing apparatus operated in positive-pressure mode. Requirements for Respiratory Protection for Inorganic Arsenic Particulate Except for Those With Significant Vapor Pressure Airborne Concentration (as As) or Condition of Use (2) Any self-contained breathing apparatus.Īrsenic, inorganic (1910.1018) Requirements for Respiratory Protection for Inorganic Arsenic ParticulateĮxcept for Those With Significant Vapor Pressure Self-contained breathing apparatus with full facepiece in positive-pressure mode. (2) Self-contained breathing apparatus with full facepiece in positive-pressure mode. (1) Supplied-air and auxiliary self-contained breathing apparatus with full facepiece in positive-pressure mode or A respirator affording higher levels of protection than this respirator may be substituted.Īcrylonitrile (1910.1045) Airborne Concentration or Condition of Use 13 Carcinogens (4-Nitrobiphenyl, etc.) (1910.1003)Įmployees engaged in handling operations involving the carcinogens listed below must be provided with, and required to wear and use, a half-mask filter-type respirator for dusts, mists, and fumes. For all of the chemicals listed in this appendix, any respirators that are permitted at higher environmental concentrations can be used at lower concentrations. ![]() 134 for the full content of the changes that apply. Fit testing is required by OSHA for all tight-fitting air-purifying respirators. These subheadings, which are also the titles of the affected standards within and, are followed by the standard number(s) in parentheses and the OSHA respirator requirements. Incorporated within the preamble of this ruling were changes to OSHA regulations for several chemicals or substances, which are listed as subheadings in blue text throughout this appendix. Revisions to the OSHA Respiratory Protection Standard (.134) became effective on April 8, 1998. ![]()
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