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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date: Q Site Name: /_� a=1a d <br /> Technician:,-AL/I 6�2i IV" 41;1_G Job No. <br /> WEATHER OBSERVATIONS <br /> Wind Speed: 69431 MPH Wind Direction: �y Barometric Pressure:` G <br /> "H9 <br /> Air Temperature:— 'F General Weather Conditions: <br /> e <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�a6%CO2 %O2 ,ti 3 <br /> Time CH4 CO2 02 <br /> Post-monitoring Calibration Check <br /> Time CH4 CO202 <br /> NOTES: <br />