![]() ![]() 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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