# Approval and Promulgation of Air Quality Implementation Plans; Delaware; Requirements for Preconstruction Review, Prevention of Significant Deterioration
> **Rule** · Final rule. · Published 2011-09-20 · Effective 2011-10-20 · 76 FR 58120
## Document
- **Document number:** 2011-23984
- **Category:** air-emissions
- **Federal Register citation:** 76 FR 58120
- **CFR reference:** 40 CFR 52
- **Publication date:** 2011-09-20
- **Effective date:** 2011-10-20
- **State:** DE
- **EPA docket:** EPA-R03-OAR-2010-0770
## Abstract

EPA is approving a State Implementation Plan (SIP) revision submitted by the State of Delaware. The revision establishes and requires the addition of nitrogen oxides (NO<INF>X</INF>) as a precursor to ozone in the Delaware SIP. EPA is approving this revision to include NO<INF>X</INF> as a precursor to ozone in the requirements for preconstruction review for prevention of significant deterioration (PSD) areas in Delaware in accordance with the requirements of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/09/20/2011-23984/approval-and-promulgation-of-air-quality-implementation-plans-delaware-requirements-for)
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