Approval and Promulgation of Air Quality Implementation Plans; State of Utah; Revisions to Nonattainment Permitting Regulations

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The Environmental Protection Agency (EPA) is proposing to conditionally approve State Implementation Plan (SIP) revisions submitted by the state of Utah on August 20, 2013, with supporting administrative documentation submitted on September 12, 2013. These submittals revise the Utah Administrative Code (UAC) that pertain to the issuance of Utah air quality permits for major sources in nonattainment areas. The EPA proposes a conditional approval because while the submitted revisions to Utah's nonattainment permitting rules do not fully address the deficiencies in the state's program, Utah has committed to address additional remaining deficiencies in the state's nonattainment permitting program no later than a year from the EPA finalizing this conditional approval. If finalized, and upon the EPA finding a timely meeting of this commitment in full, the proposed conditional approval of the SIP revisions would convert to a final approval of Utah's plan. This action is being taken under section 110 of the Clean Air Act (CAA) (Act).