On April 30, 2012, the Environmental Protection Agency (“EPA”) issued a final rule for the implementation of the 2008 National Ambient Air Quality Standards (“NAAQS”) for ground-level ozone.  The final NAAQS rule identifies nonattainment areas, establishes nonattainment parameters and sets compliance deadlines for states to come into attainment.

On April 4, 2012, Oklahoma Attorney General, E. Scott Pruitt, filed a petition with the United States Court of Appeals for the Tenth Circuit (“10th Circuit”) on behalf of the state, Oklahoma Gas & Electric (“OG&E”), and Oklahoma Industrial Energy Consumers seeking a stay of the Environmental Protection Agency’s (“EPA”) Federal Implementation Plan (“FIP”) (or “regional haze rule”) for the state.

On February 27, 2012, EPA proposed not to change its greenhouse gas (“GHG”) permitting thresholds for the Prevention of Significant Deterioration (“PSD”) and Title V Operating Permit programs.  Under the proposal, smaller emissions sources will continue to be exempt from obtaining a PSD permit, while larger GHG emissions sources will continue to require a PSD permit.