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SEM FORM 1 <br /> SURFACE EMISSIONS MONITORING <br /> CALIBRATION AND PERTINENT DATA <br /> Date: 10Site Name: <br /> Inspector(s): Instrument: r'j 5y� <br /> WEATHER OBSERVATIONS <br /> Wind Speed: MPH Wind Direction:, Barometric Pressure: q, "Hg <br /> Air Temperature: OF General Weather Conditions: G <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 calibration gas as a percentage. The calibration <br /> precision must be less than or equal to 10% of the calibration gas value. <br /> Instrument ID: Off/S'll f !b I U Cal Gas Concentration: 6co ppm <br /> Trial Zero Air Reading Cal Gas Reading Cal Gas Conc.—Cal Gas Readin <br /> 2 0 <br /> 3 0 <br /> Average Difference: , <br /> Calibration Precision =Average Difference/Cal Gas Conc. X 100% <br /> _ 3 / soon x 100% <br /> CR C� % <br /> Post-monitoring Calibration Check <br /> Zero Air Reading: 0 ppm Cal Gas Reading: �Tdc-, ppm <br /> BACKGROUND CONCENTRATION CHECKS <br /> Upwind Location Description: Reading: Y, Yppm <br /> Downwind Location Description: rc, f;n,4,0I-\ Reading: S [Lppm <br /> NOTES: <br />