# Approval and Promulgation of Air Quality Plans; Indiana; Ozone
> **Rule** · Final rule. · Published 2001-11-13 · Effective 2001-12-13 · 66 FR 56944
## Document
- **Document number:** 01-27722
- **Category:** air-emissions
- **Federal Register citation:** 66 FR 56944
- **CFR reference:** 40 CFR 52
- **Publication date:** 2001-11-13
- **Effective date:** 2001-12-13
- **State:** IN
- **EPA docket:** IN136-2
## Abstract

The EPA is fully approving State Implementation Plan (SIP) revisions submitted by the Indiana Department of Environmental Management (IDEM) for attainment of the 1-hour ozone standard in the Chicago-Gary-Lake County ozone nonattainment area. These SIP revisions are required by Section 182 of the Clean Air Act. This action approves the following: An ozone attainment demonstration; a plan demonstrating how progress in emission reductions will be achieved by specified milestone years through the area's attainment date of 2007 (i.e. a post-1999 Rate of Progress Plan (ROP)); a contingency measures plan for both the ozone attainment demonstration and the post-1999 ROP plan; a reasonably available control measure (RACM) analysis; NO<INF>X</INF> waiver revisions; motor vehicle emissions budgets; and commitments to complete a mid-course review and to recalculate the motor vehicle emissions budgets using MOBILE6. Also, EPA is incorporating into the SIP a portion of an agreed order between U.S. Steel (currently USX Corporation) and the IDEM to establish a coke plant process water treatment plant at its Gary Works. We proposed approval of these SIP revision elements on August 3, 2001 (66 FR 40802).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/11/13/01-27722/approval-and-promulgation-of-air-quality-plans-indiana-ozone)
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