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i 6 <br /> 3. QM=n Defi©encv NE <br /> "- Instrument and Date Action Level Frequency/Duration <br /> of Calibration (Ambient Air) of.Air Monitoring Action <br /> Oz meter Less than 1.95% Oz Do not enter <br /> More than 23% Oz <br /> 4. r jutruments, NE <br /> ..> Action Level <br /> Instrument and Date (Breathing Zone/ Duration/Frequency <br /> r- of Calibration Ambient Air) of Air Monitoring Action <br /> Mr Date <br /> Draeger pump/tubes <br /> x <br /> Radiation monitor <br /> Heat stress meter <br /> Noise meter <br /> HxS meter <br /> pH analyzer <br /> Others <br /> i <br /> i <br /> B. AIR M!2NIIQRKNQ F R UNKN WN CONTAMINANTS - For totally unknown contaminants, the 9 <br /> following levels of protection must be util'ized. <br /> PID or FID in Breathing Zone <br /> Rgadine for one minute <br /> j Background Level D ; <br /> >0-5 ppm above background Level C <br /> 5-500 ppm above background Level B <br /> 500-1,000 ppm above background Level A <br /> 16 <br />