# Approval and Promulgation of Air Quality Implementation Plans; Indiana; Lake and Porter Counties, Indiana, 1997 8-Hour Ozone Maintenance Plan and 1997 Annual Fine Particulate Matter Maintenance Plan Revision to Approved Motor Vehicle Emissions Budgets
> **Rule** · Direct final rule. · Published 2013-05-15 · Effective 2013-07-15 · 78 FR 28503
## Document
- **Document number:** 2013-11456
- **Category:** air-emissions
- **Federal Register citation:** 78 FR 28503
- **CFR reference:** 40 CFR 52
- **Publication date:** 2013-05-15
- **Effective date:** 2013-07-15
- **State:** IN
- **EPA docket:** EPA-R05-OAR-2013-0021 and EPA-R05-OAR-2013-0022: FRL-9812-4
## Abstract

EPA is approving Indiana's request to revise the Lake and Porter Counties State Implementation Plans (SIPs) for the 1997 8-hour ozone standard, and the 1997 annual fine particulate matter (PM<INF>2.5</INF>) standard to replace the previously approved motor vehicle emissions budgets (budgets) with budgets developed using EPA's Motor Vehicle Emissions Simulator (MOVES) 2010a emissions model. The Indiana Department of Environmental Management (IDEM) submitted these requests to EPA with submittal letters dated February 1, 2013.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/05/15/2013-11456/approval-and-promulgation-of-air-quality-implementation-plans-indiana-lake-and-porter-counties)
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