# Approval and Promulgation of Air Quality Implementation Plans; Indiana; Alternate Monitoring Requirements for Indianapolis Power and Light-Harding Street Station
> **Rule** · Direct final rule. · Published 2010-04-13 · Effective 2010-06-14 · 75 FR 18757
## Document
- **Document number:** 2010-8295
- **Category:** air-emissions
- **Federal Register citation:** 75 FR 18757
- **CFR reference:** 40 CFR 52
- **Publication date:** 2010-04-13
- **Effective date:** 2010-06-14
- **State:** IN
- **EPA docket:** EPA-R05-OAR-2009-0118
## Abstract

Indiana requested on December 31, 2008, that EPA approve as a revision to its State Implementation Plan (SIP) alternative monitoring requirements for the Indianapolis Power and Light Company (IPL) at its Harding Street Generating Station. The alternative monitoring requirements allow the use of a particulate matter (PM) continuous emissions monitoring system (CEMS) in place of a continuous opacity monitor system (COMS).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/04/13/2010-8295/approval-and-promulgation-of-air-quality-implementation-plans-indiana-alternate-monitoring)
---
*AI Analytics · CC0 1.0*