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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION_AND PERTINENT DATA <br /> Date: Site Name: <br /> Technician: r Job No. , <br /> 'WEATHER OBSERVATIONS <br /> Wind Speed: MPH Wind Direction: Barometric Pressure Hg <br /> Air Temperature: OF 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. <br /> Calibration Gas: %CH4 %CO2 %02 <br /> Time CH4 CO2 02 <br /> Post-monitoring Calibration Check <br /> Time CH4 CO2 02 <br /> NOTES <br /> Calibration Form GEM <br /> 12/2103 9:54 AM <br />