Approval and Promulgation of Air Quality Implementation Plans; Iowa; Update to Materials Incorporated by Reference

The Environmental Protection Agency (EPA) is updating the materials submitted by Iowa that are incorporated by reference (IBR) into the state implementation plan (SIP). EPA is also notifying the public of the correction of certain typographical errors within the IBR table. The regulations affected by this update have been previously submitted by the state agency and approved by EPA. This update affects the SIP materials that are available for public inspection at the National Archives and Records Administration (NARA), and the Regional Office.