ADEQ welcomes comments on the proposed Arizona State Implementation Plan (SIP) 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 PM_2.5 and therefore does not contribute to the PM_2.5 nonattainment in the State.  Therefore, ADEQ is proposing that establishing a significant emission rate for ammonia as a PM_2.5 precursor is unnecessary pursuant to 40 C.F.R. § 51.165(a)(13).

Review Documents

Original Published Public Notice | View/Download >
SIP Revision: Demonstration of a Significant Emission Rate for Ammonia | View/Download >

Documents may also be reviewed in person at the ADEQ Record Center | Learn More >

Public Comment Period 

Dates: Feb. 25, 2019 – March 27, 2019

Comments may be submitted as follows:
     Email | Send Email > 
     Mail (Must be postmarked or received by March 27, 2019):

       ADEQ
       Zachary Dorn
       Air Quality Division, Air Quality Improvement Planning Section
       1110 W. Washington Street
       Phoenix, AZ  85007

Public Hearing

Date: Wednesday, March 27, 2019
Time: 2 p.m.
Place: ADEQ, Room 145
            1110 W. Washington Street
            Phoenix, AZ 85007