# Approval and Promulgation of Air Quality Implementation Plans; Maryland; The 2005 ROP Plan for the Baltimore Severe 1-Hour Ozone Nonattainment Area: Revisions to the Plan's Emissions Inventories and Motor Vehicle Emissions Budgets to Reflect MOBILE6
> **Rule** · Final rule. · Published 2004-02-13 · 69 FR 7133
## Document
- **Document number:** 04-3224
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 7133
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-02-13
- **State:** MD
- **EPA docket:** MD151-3107
## Abstract

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

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/02/13/04-3224/approval-and-promulgation-of-air-quality-implementation-plans-maryland-the-2005-rop-plan-for-the)
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