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+FEB_22_2005 09.16AiA FROM- +9255517995 T-751 P.009/013 F-963 <br />AIR MONITORING \P`" <br />Air monitoring should be conducted with instruments selected to measare contaminants that employees may be <br />exposed to. Measurements should be taken within the breathing zones of workers. If action levels are reached <br />for one minute reading, appropriate action must occur. <br />GASES AND VAPORS v.J cd <br />Instrument Calibration Frequency/Duration Action Level <br />]Date of Gas of Air (a) (b) Above Ground <br />Calibration Standard Monitoring Breathing Zone on <br />Introduce <br />controls (fans) <br />Gear level <br />Don respirator <br />Gear Level C <br />Upgrade to Level B <br />Upgrade to Level A <br />(a) Action Levels for "known contaminants" should be based upon the contaminants Permissible Exposure <br />Level (PEL) or Threshold Limit Values (TLVs). <br />(b) Action levels for unknown contaminants are based upon the following: <br />HNu or OVA Measurements in Breathing Zone - one minute reading <br />Background Level D <br />> 9-5 ppm aboveground background Level C <br />5-500 ppm aboveground background Level B <br />500-1,000 ppm aboveground background Level A <br />Comments:! <br />EXI?OSUTRE JL4ZARD V'' <br />Instrument Frequency/Duration <br />Action Level <br />Date of of Air <br />(a) (b) Above Ground <br />Calibration Monitoring <br />Breathing Zone Action <br />Greater than. 20% LEL Leave Area <br />OXYGEN DEFICIENCY �4 <br />Instrument Frequency/I ition <br />Action Level <br />Date of of Air <br />(a) (b) Above Ground <br />Calibration Monitoring <br />Breathing Zone Action <br />Less than 19.5% Q2 <br />Do not enter <br />More than 23% 02 <br />10 <br />