Approval and Promulgation of Implementation Plans; Idaho: Stationary Source Permitting Revisions

The Environmental Protection Agency (EPA) is approving, and incorporating by reference, revisions to the Idaho State Implementation Plan (SIP) submitted on May 21, 2015. In the submission, Idaho revised stationary source permitting rules, including the addition of facility-wide emission limits and nonmetallic mineral processing plant regulations. Idaho also added an alternative method for stationary sources to comply with sulfur content of fuels limits, and updated provisions to account for changes to federal air quality regulations. The EPA is approving the submitted revisions, with the exception of certain provisions that are inappropriate for SIP approval.