40 CFR § 52.1529
Significant deterioration of air quality
June 9, 2020
New Hampshire's Part Env-A 623, “Requirements for Prevention of Significant Deterioration Permits,” as submitted on August 6, 2001, is approved as meeting the requirements of Subpart 1, Part C, Title I, of the Clean Air Act.
[67 FR 65713, Oct. 28, 2002]