Air Plan Approval; Iowa; Revisions to Iowa Air Quality Regulations

The EPA is proposing to approve revisions to the Iowa SIP and Title V Operating Permit Program to incorporate recent changes to Section 567 of the Iowa Administrative Code. The proposed changes include removal of the Voluntary Operating Permit Program; removal of the Emission Reduction Program; removal of previously SIP-approval language that was erroneously SIP-approved, including the case-by-case MACT determination language; new and renumbered rules; replacement of duplicative language with references to state statute and federal regulations; updated definitions; consolidation of 14 chapters into 8 chapters; and minor language clarifications and grammatical changes.