News & Analysis as of

Statutory Interpretation National Ambient Air Quality Standards Air Pollution

Mitchell, Williams, Selig, Gates & Woodyard,...

New Source Review/Clean Air Act: U.S. Environmental Protection Agency Guidance Addressing "Begin Actual Construction"

The United States Environmental Protection Agency (“EPA”) issued a September 2nd interpretive letter addressing the definition of “Begin Actual Construction” in the Clean Air Act New Source Review (“NSR”) regulations....more

Foley Hoag LLP - Environmental Law

The Other Shoe Drops on Upwind Ozone States

On Tuesday, the District of Columbia Court of Appeals vacated EPA’s “Close-Out Rule,” which basically concluded that upwind states contributing to exceedances of the National Ambient Air Quality Standard for ozone in downwind...more

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