On Monday, Feb. 25, 2019, the public comment period began for the proposed Arizona State Implementation Plan Revision: Demonstration of a Significant Emission Rate for Ammonia. The plan demonstrates, pursuant to 40 C.F.R. § 51.165(a)(13) and 83 Fed. Reg. 19631 (May 4, 2018), that ammonia is not a significant precursor in the formation of secondary PM2.5 and therefore does not contribute to the PM2.5 nonattainment in the State. Therefore, ADEQ is proposing that establishing a significant emission rate for ammonia as a PM2.5 precursor is unnecessary pursuant to 40 C.F.R. § 51.165(a)(13).
Comments may be submitted as follows:
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Mail: (Must be postmarked or received by March 27, 2019)
Air Quality Division, Air Quality Improvement Planning Section
1110 W. Washington Street
Phoenix, AZ 85007