North Carolina submitted a letter to EPA on December 16, 2019, with a commitment to address the State Implementation Plan deficiencies regarding the PSD-related requirements of CAA sections 110(a)(2)(C), 110(a)(2)(D)(i)(II) (Prong 3), and 110(a)(2)(J) for the 2015 8-hour ozone NAAQS. EPA conditionally approved these portions of North Carolina's September 27, 2018 infrastructure SIP submission in an action published in the Federal Register on April 15, 2020. If North Carolina fails to meet its commitment by April 15, 2021, the conditional approval will become a disapproval on that date and EPA will issue a notification to that effect.

[85 FR 20838, Apr. 15, 2020]