Phoenix, AZ


EPA Refines “Ambient Air” Policy

Nov 15, 2018

On November 9, 2018, EPA released a draft memorandum, “Revised Policy On Exclusions from ‘Ambient Air,’” that expands the number of measures that may be considered by sources and permitting authorities in determining where the “ambient air boundary” is located and hence where compliance with the National Ambient Air Quality Standards (NAAQS) is required. Read More


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