# Air Plan Approval; Illinois; Rule Part 225, Control of Emissions From Large Combustion Sources
> **Rule** · Final rule. · Published 2018-02-28 · Effective 2018-03-30 · 83 FR 8612
## Document
- **Document number:** 2018-03991
- **Category:** air-emissions
- **Federal Register citation:** 83 FR 8612
- **CFR reference:** 40 CFR 52
- **Publication date:** 2018-02-28
- **Effective date:** 2018-03-30
- **State:** IL
- **EPA docket:** EPA-R05-OAR-2016-0397
## Abstract

The Environmental Protection Agency (EPA) is approving a revision to the Illinois state implementation plan (SIP) to amend requirements applicable to certain coal-fired electric generating units (EGUs). These amendments require the Will County 3 and Joliet 6, 7, and 8 EGUs to permanently cease combusting coal; allow other subject EGUs to cease combusting coal as an alternative means of compliance with mercury emission standards; allows the transfer of an existing sulfur dioxide (SO<INF>2</INF>) control technology requirement exemption from Joliet 6 EGU to Will County 4 EGU; require all subject EGUs to comply with a group annual nitrogen oxide (NO<INF>X</INF>) emission rate; and require only those subject EGUs that combust coal to comply with a group annual SO<INF>2</INF> emission rate. EPA proposed this action on August 31, 2017, and received two public comments in response.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/02/28/2018-03991/air-plan-approval-illinois-rule-part-225-control-of-emissions-from-large-combustion-sources)
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