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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date: Site Name: 791_ 2 <br /> Technician: Job No. <br /> WEATHER OBSERVATIONS <br /> Wind Speed: J-/5--MPH Wind Direction: Barometric Pressure.-?9?�?2"Hg <br /> Air Temperature:� °F General Weather Conditions: <br /> CALIBRATION INFORMATION <br /> Pre-monitoring Calibration Precision Check <br /> Procedure: Calibrate the instrument. Make a total of three measurements by alternating zero air <br /> and the calibration gas. Record the readings and calculate the average algebraic difference <br /> between the instrument reading and the calibration gas as a percentage. The calibration <br /> precision must be less-than or equal to 2% of the calibration gas value. - <br /> Instrument Serial No. e0?,37 <br /> Calibration Gas: %CH4 (�00 %CO2 <<J %02 <br /> Time CH4 CO2 02 <br /> Post-monitoring Calibration Check <br /> Time CH4 CO2 02 <br /> NOTES: <br /> Calibration Form GEM <br /> 12112/03 9:08 AM <br />