# Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; The 2005 ROP Plan for the Pennsylvania Portion of the Philadelphia-Wilmington-Trenton Severe Area Severe 1-Hour Ozone Nonattainment Area
> **Rule** · Final rule. · Published 2004-05-21 · Effective 2004-06-21 · 69 FR 29238
## Document
- **Document number:** 04-11339
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 29238
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-05-21
- **Effective date:** 2004-06-21
- **State:** PA
- **EPA docket:** PA213-4026
## Abstract

EPA is approving State Implementation Plan (SIP) revisions submitted by the Commonwealth of Pennsylvania. These revisions amend Pennsylvania's rate-of-progress (ROP) plan for 2005 for its portion of the Philadelphia-Wilmington-Trenton severe 1-hour ozone nonattainment area (the Philadelphia area). These revisions update the plan's emission inventories and motor vehicle emissions budgets (MVEBs) to reflect the use of MOBILE6 while continuing to satisfy the ROP requirement for 2005. The revisions also amend the contingency measures associated with the 2005 ROP plan. These SIP revisions are being approved in accordance with the Clean Air Act (the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/05/21/04-11339/approval-and-promulgation-of-air-quality-implementation-plans-pennsylvania-the-2005-rop-plan-for-the)
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