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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date: Site Name: <br /> Technician: aJob No. F( <br /> WEATHER OBSERVATIONS <br /> Wind Speed: MPH Wind Direction: Barometric PressureZ_D_ <br /> �,uC!'H g <br /> Air Temperature:_C °F General Weather Conditions ►e►t <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 /> y 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 6%CO2 %02_ <br /> Time CH4 CO2 hh O2 <br /> U <br /> Post-monitoring Calibration Check <br /> Time CH4 I CO2 O2 <br /> NOTES: <br /> Calibration Form GEM <br /> 12/12/03 9:08 AM <br />