Summary

EPA is taking final action to approve revisions to the Arizona Department of Environmental Quality (ADEQ) portion of the applicable Clean Air Act (CAA or Act) state implementation plan (SIP) for the State of Arizona (State). We are approving revisions that are primarily intended to correct deficiencies in ADEQ's SIP-approved rules for the issuance of New Source Review (NSR) permits for stationary sources, with a focus on the Act's preconstruction permit requirements for major sources and major modifications. This action also finalizes a conditional approval of ADEQ's NSR program with respect to the CAA requirements related to ammonia as a precursor to fine particulate matter (PM_2.5) under the nonattainment NSR (NA-NSR) program requirements in CAA section 189(e). In addition, this action permanently terminates the sanctions clock associated with deficiencies being corrected by the rules being approved today, except that this action continues the deferral of sanctions under the Act related to PM_2.5 precursors under section 189(e) of the Act for the NA-NSR program.

Dates

This rule is effective June 4, 2018.

Addresses

EPA has established a docket for this action under Docket ID No. EPA-R09-OAR-2017-0255. All documents in the docket are listed on the www.regulations.gov website. Although listed in the index, some information is not publicly available, e.g., Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the internet and will be publicly available only in hard copy form. Publicly available docket materials are available through www.regulations.gov, or please contact the person identified in the FOR FURTHER INFORMATION CONTACT section for additional availability information.

For Further Information Contact

Lisa Beckham ( beckham.lisa@epa.gov), EPA Region IX, (415) 972-381.