Air Plan Approval; Wisconsin; Modification of Greenhouse Gas Language

The Environmental Protection Agency (EPA) is finalizing an approval to a revision to the Wisconsin State Implementation Plan (SIP) submitted by the Wisconsin Department of Natural Resources (WDNR) to EPA on November 28, 2017. In this revision, WDNR makes modifications to the language associated with how greenhouse gases are evaluated in the Prevention of Significant Deterioration (PSD) program. These revisions were made to reflect changes required by the United States Supreme Court in its June 23, 2014 decision, Utility Air Regulatory Group (UARG) v. EPA), 134 S. Ct. 2427.