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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date: j <br /> Site Name; <br /> Technician: rt Job No. <br /> WEATHER OBSERVATIONS <br /> Wind Speed: MPH Wind Direction:._ �.J __ Barometric Pressure;_Y-,�'Hg <br /> Air Temperature: f2 °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 a <br /> ItemaAng <br /> -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 201, of the calibration gas value. <br /> Instrument Serial No. <br /> Calibration Gas: %CH4L,0_0 %CO2 %02 <br /> Time CH4 CO2 02 <br /> .: 0 jS -� <br /> Post-monitoring Calibration Check <br /> Time CH4 CO2 02 <br /> NOTE'S: <br />