Revised EPA ‘Ambient Air’ Policy Definition Spurs Fight On Legality, Scope

EPA’s draft guidance narrowing its policy definition of “ambient air” is spurring a fight between environmentalist critics and industry supporters, with opponents arguing the move is unlawful and will allow facilities to evade Clean Air Act permitting requirements while its backers are urging the agency to further limit air permit mandates. The competing positions are detailed in recently filed comments obtained by Inside EPA on the agency’s unsigned guidance from November that would allow regulators to consider a wider...