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7hble 3.—Respiratory protection for benzene <br /> Condition M e>espiriatary p+atecdod <br /> AnY detectable concenrrauon Any self-contained bresttuag apparatus with a full faceptece and operated in a pressure-demand <br /> tor other positive pressure made <br /> Any supplied-air respirator with a full &cepiece and operated in a pr=ure or other <br /> posttive pressure mode in cwmbu mon with an auxiliary self-contained breathing apparatus oper- <br /> ated m a pressure-demand or other positive possum mode <br />' Planned or emergency entry Any self-contained breathing apparatus with a hill faceptece and operated in a pressure-denrsrid <br /> into enviraimierits contarmng or other positive pressure mode <br /> unlrnown or any deu=ble <br /> concentration Any supplied-air respirator with a full facepiem and operated in a pressure-demand or other <br /> posi:;ve pressure mode m combmman with an auxiliary self-contained breathing apparatus oper- <br /> and m a pressure-demand or other positive pressure made <br />' Firefighung Any SCIPconutined bred mi;apparatus with a full h cqn=and opez:red in a pressufe-demand <br /> or other posrnve pressure mode <br /> Escape only Any air-Partying Cull faeepeoe respirator(gaa mask)with a rhm-style or front-or back-nhounted <br /> organic canum <br /> Any appoprraae escape-type self-contained Ih dung apparatus <br /> *Only NIOSHIMSHA-approved gwpmeit sbctild be used. <br /> 4 <br /> r <br /> 6 Benzw. <br />