Denial of Request for Extension of Attainment Date for 1997 PM2.5 NAAQS; California; San Joaquin Valley Serious Nonattainment Area

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요약

The Environmental Protection Agency (EPA) is denying a request submitted by California for extension of the attainment date for the 1997 24-hour and annual fine particulate matter (PM 2.5 ) national ambient air quality standards in the San Joaquin Valley Serious PM 2.5 nonattainment area.

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