---
kind: "section"
citation: "40 C.F.R. § 52.931"
title: "40"
number: "52.931"
heading: "Significant deterioration of air quality."
url: "https://uscodex.org/cfr/40/52.931"
---

# §52.931. Significant deterioration of air quality.

- (a) **Regulations for preventing significant deterioration of air quality.** The provisions of [§ 52.21 (b) through (w)](/cfr/40/52.21.md?p=b..w) are hereby incorporated and made a part of the applicable state plan for the State of Kentucky only as they apply to permits issued pursuant to [§ 52.21](/cfr/40/52.21.md) prior to final approval of Kentucky's Regulation for Prevention of Significant Deterioration (PSD), Visibility Monitoring, and Visibility New Source Review in Attainment Areas. The provisions of [§ 52.21 (b) through (w)](/cfr/40/52.21.md?p=b..w) are rescinded for permits issued after final approval of Kentucky's Regulation for Prevention of Significant Deterioration (PSD), Visibility Monitoring, and Visibility New Source Review in Attainment Areas.
- (b) The Commonwealth of Kentucky has committed to revising the state's regulations accordingly when EPA amends the federal vessel emissions provisions contained in [40 CFR 51.166](/cfr/40/51.166.md). In a letter dated October 17, 1986, Kentucky stated:
- (c) In a letter dated May 3, 1988, EPA informed Kentucky that the following caveat must be included in all potentially affected permits due to a decision of the U.S. Court of Appeals for the District of Columbia Circuit (NRDC v. Thomas, 838 F.2d 1224):

  Kentucky responded with a letter dated May 11, 1988, stating in part:

- (d) All applications and other information required pursuant to [§ 52.21](/cfr/40/52.21.md) from sources located in the Commonwealth of Kentucky shall be submitted to the appropriate state or local agency for which the source is located, rather than to EPA's Region 4 office: Kentucky Department for Environmental Protection, Division for Air Quality, 300 Sower Boulevard, 2nd Floor, Frankfort, Kentucky 40601; or Louisville Metro Air Pollution Control District, 701 W. Ormsby Ave., Suite 303, Louisville, Kentucky 40203.

## Notes

### Amendments

[54 FR 36311, Sept. 1, 1989, as amended at 74 FR 55143, Oct. 27, 2009; 79 FR 30050, May 27, 2014; 82 FR 32645, July 17, 2017]

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Amendments

[40 FR 5521, Feb. 6, 1975]

### Amendments

[54 FR 36311, Sept. 1, 1989, as amended at 74 FR 55143, Oct. 27, 2009; 79 FR 30050, May 27, 2014; 82 FR 32645, July 17, 2017]