Approval and Promulgation of Implementation Plans; State of Iowa

EPA is approving the State Implementation Plan (SIP) revision submitted by the state of Iowa to demonstrate that the state meets the requirements of Section 110(a)(1) and (2) of the Clean Air Act (CAA). Section 110(a) of the CAA requires that each state adopt and submit a SIP for the implementation, maintenance and enforcement of each NAAQS promulgated by the EPA and is commonly referred to as an infrastructure SIP. In 1997, EPA promulgated the 8-hour ozone primary and secondary NAAQS. A revision to Iowa's SIP detailing how the state plans to ensure that the revised ozone standard is implemented, enforced, and maintained in Iowa was submitted on June 15, 2007. The submittal addressed all the elements of the October 2, 2007, guidance issued by the Office of Air Quality and Planning Standards with regard to infrastructure SIPs.