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These displays show that the daily maximum 4-hour average PM 2.5 light extinction values in all of the study areas other than the three western non-California areas and the two areas in Texas are estimated to exceed the high CPL from about 4 percent up to over 15 percent of the days and the middle CPL from about 15 percent up to about 45 percent of the days, while all areas except Phoenix are esti
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