Approval of Air Quality State Implementation Plans (SIP); State of Iowa; Infrastructure SIP Requirements for the 2008 Lead National Ambient Air Quality Standard (NAAQS)

The Environmental Protection Agency (EPA) is taking final action to approve a State Implementation Plan (SIP) submission from the State of Iowa addressing the applicable requirements of Clean Air Act (CAA) section 110 for the 2008 National Ambient Air Quality Standards (NAAQS) for Lead (Pb), which requires that each state adopt and submit a SIP to support implementation, maintenance, and enforcement of each new or revised NAAQS promulgated by EPA. These SIPs are commonly referred to as "infrastructure" SIPs. The infrastructure requirements are designed to ensure that the structural components of each state's air quality management program are adequate to meet the state's responsibilities under the CAA. EPA is also taking final action to approve a supplemental revision for the SIP to include article 1, section 2 of the Iowa Constitution, and portions of the Iowa Code and the Iowa Administrative Code to codify the relevant state laws as applied to conflict of interest requirements of section 128 of the CAA.