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SEM FORM 1 <br /> SURFACE EMISSIONS MONITORING <br /> CALIBRATION AND PERTINENT DATA <br /> Date: �l `� V 7 Site Name:AW62% <br /> Technician: 1jV5 7n Ve 14,1411 Instrument: <br /> Job No. PZOOt)ti4 c)/ <br /> WEATHER OBSERVATIONS <br /> Wind Speed: 0 MPH Wind Direction: 5 Barometric Pressure:3)y "WC <br /> Air Temperature: OF 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 calibration gas as a percentage. The calibration <br /> precision must be less than or equal to 10%of the calibration gas value. <br /> Instrument Serial No. 2 ' Cal Gas Concentration: �� Dpm <br /> Trial Zero Air Reading Cal Gas Reading Cal Gas Conc.—Cal Gas Readingl <br /> 1 0 Too d <br /> 2 1 Z <br /> 3 'Sul <br /> Average Difference: <br /> Calibration Precision =Average Difference/Cal Gas Conc. X 100% <br /> _ t / 06 X 100% <br /> _ �% <br /> Post-monitoring Calibration Check <br /> Zero Air Reading: _ ppm Cal Gas Reading: 5VL—p pm <br /> BACKGROUND CONCENTRATION CHECKS <br /> Upwind Location Description: Reading:_ppm <br /> Downwind Location Description: Reading:_ppm <br /> NOTES: <br /> Calibration Form OVA <br />