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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND'PERTINENT DATA <br /> i Site Name: <br /> Date: b Lt2 Ula <br /> Technician: �mtc— L ILSM-4 Cq- ' - ob No. 01' D <br /> WEATHER OBSERVATIONS <br /> Wind Speed: MPH Wind Direction: Barometric Pressure:' -&Hg <br /> Air Temperature: <br /> °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 /> t 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 D %CO2 ` %02 <br /> Time CH4 CO2 <br /> 02 <br /> e3L( r� <br /> post-monitoring Calibration Check CO2 02 <br /> Time CH4 <br /> NOTES: <br /> Calibration Form GEM <br />