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LANDFILL GAS MONITORING <br /> GEM 500 CALIBRATION AND PERTINENT DATA <br /> Date: 2 I3cSite Name:_ <br /> Technician: Job No. <br /> WEATHER OBSERVATIONS <br /> Wind Speed: /-S MPH Wind Direction: _'z-0 Barometric Pressure:3�'•lU"Hg <br /> Air Temperature:1Z _ °F General Weather Conditions: C Lc, Lc% 17-7 <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 /> andthe 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 /> preC cion must be less than or equal to 2% of the calibration gas value. <br /> Instrument Serial No. ,� _7 <br /> Calibration Gas: %CH4 (!�0.O %CO2 3576 /02 <br /> Time CH4 CO2 - 02 - <br /> Post-monitorin2 Calibration Check <br /> Time CH4 COz O2 <br /> .� <br /> NOTES: <br />