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Tuesday, June 24, 2008

PM2.5 Measurements At Sacramento T Street

Left: Monday evening sunset was the color of my car.


The smoke plume from the fire between Napa and Fairfield (first seen by myself while driving to Davis Saturday evening, 6/21, about 7 p.m.) is a hot air pollution topic here in Sacramento.

Left: Here are the hourly concentrations of fine particulate matter (PM 2.5, meaning particulate matter below 2.5 microns in diameter) at Sacramento's T Street monitor. The new national 24-hour average PM2.5 standard (35 ug/m3) is also indicated (the pre-2006 standard was 65 ug/m3).

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