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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date: Site Name: <br /> Technician: rq)e1+iS Job No. <br /> WEATHER OBSERVATIONS <br /> Wind Speed: 3 MPH Wind Direction: Barometric Pressure: <br /> Air Temperature: L'1'2�2 °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 differepce <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. 81 Ro <br /> Calibration Gas: %CH4 �50 %CO2 %02 <br /> TimeF�(l <br /> 4 CO2 02 <br /> O 7 <br /> Post-monitoring Calibration Check <br /> Time I CH4 CO2 O2 <br /> NOTES: <br /> Calibration Form GEM <br /> 6/23/04 10:46 AM <br />