# Approval and Promulgation of Implementation Plan; Indiana
> **Rule** · Direct final rule. · Published 2000-07-05 · Effective 2000-09-05 · 65 FR 41350
## Document
- **Document number:** 00-16070
- **Category:** air-emissions
- **Federal Register citation:** 65 FR 41350
- **CFR reference:** 40 CFR 52
- **Publication date:** 2000-07-05
- **Effective date:** 2000-09-05
- **State:** IN
- **EPA docket:** IN105-1a
## Abstract

EPA is approving Indiana's State Implementation Plan (SIP) revision request to control emissions of volatile organic compounds (VOCs) from steel mill sinter plants in Lake and Porter Counties. The Indiana Department of Environmental Management (IDEM) submitted the SIP revision request on April 6, 1999. The revision applies to integrated steel mills in Lake and Porter Counties, and provides for limits on emissions of VOCs from those facilities. VOC emissions are a precursor of ground-level ozone, commonly known as smog. High ozone levels are detrimental to human health and contribute to upper respiratory ailments such as asthma.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/07/05/00-16070/approval-and-promulgation-of-implementation-plan-indiana)
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