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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date; 6U Site Name: <br /> Technician: LLV, L Job No. M <br /> WEATHER OBSERVATIONS <br /> Vlfind Speed: MPH Wind Direction: Barometric Pressure:-&B'Hg <br /> Air Temperature: °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 /> between the instrument reading and the calibraifon gas as a percentage. The calibration <br /> precision must be fess than or equal to 2%of the calibration gas value. <br /> Instivment Serial No. C-jA <br /> Calibration Gas: %CH4'Sb,0 %CO2 35 • %02 b <br /> Time CH4 002 - 02 <br /> Post-monitorinR Calibration Check <br /> Time CH4 CO2 02 <br /> NOTES: <br /> CeIR)Mtlon Fom GEM <br /> =2/03 9:08 AM <br />