EPA is taking final action to approve a revision to the State Implementation Plan (SIP) submitted by the state of Kansas. The purpose of this revision is to delete the Wyandotte County Air Pollution Control Regulations from the Federally-Approved Regulations. These regulations were originally incorporated into the SIP to assure that local-specific air quality issues were addressed with Federally-enforceable provisions. Due to the continued evolution of the Kansas Air Quality Regulations, these local regulations are no longer necessary to assure continued maintenance of air quality standards for Wyandotte County.