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-- 2. Known Cgntaminantr -- - -- r•. <br /> Action Level <br /> Above <br /> Instrument 8t Background <br /> Date of Calibration Span Setting/ (Breathing <br /> Calibration Standard Gas Select Zone) Action <br /> NISv C71`�lD �-s et- L5rvwp�, Don respirator <br /> (Level C) <br /> Leave area <br /> (Level Q <br /> Upgrade to <br /> Level B <br /> Upgrade to <br /> Level A <br /> B. Explosion Hazard <br /> Action Level <br /> Inst.srnent & Above Background <br /> Date of Calibration (Ambient Air) Action <br /> Combustible gas indicator Less than 20% LEL Leave area <br /> C_ Oxygen Deficiency <br /> Instrument & Action Level - <br /> Date of Calibration (Ambient Air) Action <br /> O= meter Less than 19.5% O= Do not enter <br /> More than 23% O= <br /> t <br /> AM14-CP 11 <br /> Juir 1.a" <br />