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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date: <br /> Site Name: ' �- <br /> Technician: _— Job No, <br /> WEATHER OBSERVATIONS <br /> Wind Speed: MPH Wind Direction: Barometric Pressure: "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 /> prec,;sion must be less than or equal to 2% of the calibration gas value. <br /> Instrument Serial No. �LZ7 <br /> Calibration Gas: %CH4' ,-O %CO2 3r-`C) %02 <br /> Time CH4 CO2 O2 <br /> Post-monitorin Calibration Check <br /> Time CH4 CO2 02 <br /> 1 3S <br /> NOTES: <br />