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SEM FORM 1 <br /> SURFACE EMISSIONS MONITORING <br /> CALIBRATION AND PERTINENT DATA <br /> Date: ,ld 9- Site Name: <br /> Inspector(s): Instrument: ;.L�. <br /> WEATHER OBSERVATIONS <br /> Wind Speed: MPH Wind Direction: f&barometric Pressure-301°Hg <br /> Air Temperature: _ °F General Weather Conditions: 4--_ L ( on <br /> CALIBRATION INFORMATION <br /> Pre-monitoring Calibration Precision Check <br /> Procedure:Calibrate the instrument. Make a total of three measurements by altemating 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: j�2J� Cal Gas Concentration: 00ppm <br /> Trial Zero Air Reading Cal Gas Read,ing lCal Gas Conc.—Cat Gas Readin <br /> 1 �� 4> <br /> 2g-� d s3 <br /> 3 is 6> <br /> Average Difference: <br /> Calibration Precision =Average Difference/Cal Gas Conc. X 900% <br /> - e / 4-0 r, X 100% <br /> _ Z42 C) % <br /> Past-monitoring Calibration Check <br /> t� <br /> Zero Air Reading: ppm Cal Gas Reading: .!o 0 ppm <br /> BACKGROUND CONCENTRATION CHECKS <br /> Upwind Location Description: ,t��i � � Read"mg: pm <br /> Downwind Location Description: Reading:Reading: pm <br /> NOTES: <br />