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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Site Name: <br /> Date: ,�� <br /> Technician: nn 1 � C� Job No. 7T)7_LY5� , bO <br /> WEATHER OBSERVATIONS <br /> Wind Speed:c"�H Wind Direction: �_ Barometric Pressure: uHg <br /> 2 —�Nev� <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 altemating 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 /V) <br /> Calibration Gas: %CH4 5D' (2%CO2 3c� ` C) %02 D G <br /> jTimeCO <br /> CH4 2 02 <br /> � LA a �� <br /> Post-milonitorin Calibration Check O2 <br /> Time CH4 CO2 <br /> NOTES: <br /> Calibration Form GEM <br />