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SEM FORM 1 <br /> SURFACE EMISSIONS MONITORING <br /> CALIBRATION AND PERTINENT DATA <br /> Date: Site Name: &4wj <br /> Inspector(s): Instrument: V14 /4 <br /> WEATHER OBSERVATIONS <br /> Wind Speed: MPH Wind Direction: Barometric Pressure:3� / "Hg <br /> Air Temperature: _�2 °F General Weather Conditions: CV__ <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�da� I.(,'5 Cal Gas Concentration: ppm <br /> Trial Zero Air Reading Cal Gas Reading Cal Gas Conc.—Cal Gas Readin <br /> 1 <br /> 2 tp <br /> 3 <br /> Average Difference: �3 <br /> Calibration Precision =Average Difference/Cal Gas Conc. X 100% <br /> X 100% <br /> % <br /> Post-monitoring Calibration Check -1 <br /> Zero Air Reading: _ppm Cal Gas Reading: . 1� ppm <br /> BACKGROUND CONCENTRATION CHECKS <br /> Upwind Location Description: Reading: ppm <br /> Downwind Location Description: Reading: ppm <br /> NOTES: <br />