# Approval and Promulgation of Air Quality Implementation Plans; Virginia; Amendments to Virginia's Regulation Regarding the Sulfur Dioxide National Ambient Air Quality Standard
> **Rule** · Final rule. · Published 2012-02-03 · Effective 2012-03-05 · 77 FR 5400
## Document
- **Document number:** 2012-2334
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 5400
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-02-03
- **Effective date:** 2012-03-05
- **State:** VA
- **EPA docket:** EPA-R03-OAR-2011-0731
## Abstract

EPA is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Virginia (Virginia). This revision pertains to amendments of Virginia's regulations regarding the 2010 1- hour primary national ambient air quality standard (NAAQS) for sulfur dioxide (SO<INF>2</INF>). This action is being taken under the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/02/03/2012-2334/approval-and-promulgation-of-air-quality-implementation-plans-virginia-amendments-to-virginias)
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