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1lable 3.—Respiratory protection for benzene <br /> Condition Minimum ry p <br /> Any detectable concentration Any self-contained breathing apps,.=with a hill <br /> facepiece and operated in apressure-demand <br /> or other positive pressure mode <br /> Any supplied-air respirator with a full facepiece and operated in a pressure-demand or other , <br /> Positive pressure mode in combination with an auxiliary self-contained breathing apparatus oper- <br /> ated in a pressu -demand or other positive pressure mode <br /> Planned or emergency entry Airy self-contained breathing apparatus with a full facepiece and operated in a pressure-demand <br /> into environments containing or other positive pressure mode <br /> unknown or any detectable <br /> concentration Any supplied-air respirator with a frill facepiece and operated in a pressure-demand or other <br /> positive pressure mode in wrnbinatm with an auxiliary self-Wmained breathing apparatus oper- <br /> ated in a or other positive pressure mode <br /> Firefighting Any sdf-oonWn d breathing apparadhs with a fulliece and <br /> facep operated in a pressure-demand <br /> or other positive pressure made <br /> Fzcape only Any Nuri' g full rCSFnU0r(gas mask)with a chin-style or front-or back-mounted <br /> oeganic canister <br /> Any appropriate S-type self-contained breathing apparatus <br /> Only NIOSH/MSHA-apprvred equipment should be used. <br /> 6. ono <br /> 19" <br />