# Approval and Promulgation of Air Quality Implementation Plans; Virginia; Revised Major Stationary Source Applicability for Reasonably Available Control Technology in the Northern Virginia Ozone Nonattainment Area
> **Rule** · Direct final rule. · Published 2004-08-09 · Effective 2004-10-08 · 69 FR 48150
## Document
- **Document number:** 04-18023
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 48150
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-08-09
- **Effective date:** 2004-10-08
- **State:** VA
- **EPA docket:** VA146-5080a
## Abstract

EPA is taking direct final action to approve a revision to the Commonwealth of Virginia State Implementation Plan (SIP). The revision specifies that the Northern Virginia Ozone Nonattainment Area is now subject to the severe major source permitting requirements and lowers the major stationary source threshold for nitrogen oxide (NO<INF>X</INF>) from 50 tons per year to 25 tons per year. EPA is approving this revision to the Commonwealth of Virginia SIP in accordance with the requirements of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/08/09/04-18023/approval-and-promulgation-of-air-quality-implementation-plans-virginia-revised-major-stationary)
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