# Approval and Promulgation of Implementation Plans; Indiana
> **Rule** · Final rule. · Published 2004-02-03 · Effective 2004-03-04 · 69 FR 5036
## Document
- **Document number:** 04-1820
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 5036
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-02-03
- **Effective date:** 2004-03-04
- **State:** IN
- **EPA docket:** IN 144-4
## Abstract

Indiana submitted a particulate matter State Implementation Plan (SIP) revision request to EPA on December 19, 2001. EPA is approving revisions to particulate matter (PM) control requirements for certain Indiana natural gas combustion sources subject to 326 Indiana Administrative Code (IAC) 6-1, Indiana's PM regulations. EPA is also approving various cleanup revisions to this rule. The revision primarily concerns PM limits for combustion sources that burn natural gas and are located in certain Indiana counties. Other revisions to the rule include minor rewording, the updating of source and facility names, and the elimination of references to sources that have shut down.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/02/03/04-1820/approval-and-promulgation-of-implementation-plans-indiana)
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