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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date: Site Name: <br /> Technician: �� Job No. <br /> WEATHER OBSERVATIONS <br /> Wind Speed: - MPH Wind Direction: Barometric Pressure %- 'Hg <br /> Air Temperature: 6D °F General Weather Conditions: &4 (2-ccrw <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 instrumen reading and fhe 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. &32 7 <br /> Calibration Gas: %CH45D,O %CO2 3 0 % <br /> Time CH4 CO2 - 02 <br /> ?sem sr o <br /> 3- <br /> Post-monitoring Calibration Check O2 <br /> Time CH4 CO2 <br /> NOTES: <br /> Calibration Form GEM <br />