Abstract
During several days in 1980 through 1981, Southern California Edison Company (SCE) using its mobile Air Quality Measurements Laboratory (AQML) equipped with a correlation spectrometer (COSPEC) characterized the plume from its 1,500 MW oil-fired power plant located in Southern California. Concurrently, on some of these days, the SRI Differential Absorption Lidar (DIAL) system compared the plume characterization results. It was found that the AQML system can track the plume aloft to the surface impact and beyond, thus characterizing the plume dispersion as a function of distance downwind. The plume heights determined by the COSPEC and the DIAL techniques agreed reasonably well, generally within 20%, whereas the predicted plume heights using the Briggs Formulation for simple atmosphere showed agreement, overestimation or underestimation, depending on the atmospheric stability. Compared to the theoretical values, the plume SO 2 fluxes determined by COSPEC were about 30–40% lower and those determined by DIAL technique were 8% lower. Finally, the stack SO 2 concentrations estimated by COSPEC and DIAL were 85% and 2% lower, respectively, compared with theoretically calculated values.
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