# Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Revision to the 1-Hour Ozone Maintenance Plan for the Pittsburgh-Beaver Valley Area To Reflect the Use of MOBILE6
> **Rule** · Final rule. · Published 2004-12-10 · Effective 2005-01-10 · 69 FR 71712
## Document
- **Document number:** 04-27167
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 71712
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-12-10
- **Effective date:** 2005-01-10
- **State:** PA
- **EPA docket:** PA217-4232
## Abstract

EPA is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Pennsylvania. The revision amends Pennsylvania's ten-year plan to maintain the 1-hour ozone national ambient air quality standard (NAAQS) in the Pittsburgh-Beaver Valley ozone maintenance area (the Pittsburgh area). The maintenance plan is being amended to revise the volatile organic compound (VOC) and nitrogen oxides (NO<INF>X</INF>) motor vehicle emission budgets (MVEBs) to reflect the use of MOBILE6. The intended effect of this action is to approve a SIP revision that will better enable the Commonwealth of Pennsylvania to maintain attainment of the 1-hour ozone NAAQS in the Pittsburgh area. This action is being taken in accordance with the requirements of the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/12/10/04-27167/approval-and-promulgation-of-air-quality-implementation-plans-pennsylvania-revision-to-the-1-hour)
---
*AI Analytics · CC0 1.0*