The Environmental Protection Agency (EPA) is determining that the Imperial County, California Moderate nonattainment area (``the Imperial County NA'') has attained the 2006 24-hour fine particulate matter (PM2.5 ) national ambient air quality standard (NAAQS). The EPA is also approving a revision to California's state implementation plan (SIP) consisting of the 2008 winter and annual base year emissions inventories for the Imperial County NA submitted by California Air Resources Board on January 9, 2015.
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Determination of Attainment and Approval of Base Year Emissions Inventories for the Imperial County, California Fine Particulate Matter Nonattainment Area
The Environmental Protection Agency (EPA) is determining that the Imperial County, California Moderate nonattainment area (``the Imperial County NA'') has attained the 2006 24-h...
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82 FR 13413
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“Determination of Attainment and Approval of Base Year Emissions Inventories for the Imperial County, California Fine Particulate Matter Nonattainment Area,” thefederalregister.org (March 13, 2017), https://thefederalregister.org/documents/2017-04782/determination-of-attainment-and-approval-of-base-year-emissions-inventories-for-the-imperial-county-california-fine-part.