Environmental Protection Agency Docket EPA-R05-OAR-2016-0512 Proposed Rule

2017-14945: Air Plan Approval; Illinois; NAAQS Updates

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Summary

The Environmental Protection Agency (EPA) is approving revised rules submitted by the State of Illinois as State Implementation Plan (SIP) revisions. The submitted rules update Illinois' ambient air quality standards to include the 2015 primary National Ambient Air Quality Standard (NAAQS) for ozone (O<INF>3</INF>), add EPA-promulgated monitoring methods for multiple NAAQS, and address EPA's revocation of the 1997 O<INF>3</INF> NAAQS. In addition, the revised rules contain the timing requirements for the "flagging of exceptional events" and the submission of documentation supporting exceptional events for the initial area designations for the 2015 primary annual O<INF>3</INF> standard. These SIP revisions update Illinois air pollution control regulations to be "identical-in-substance" to EPA rulemakings related to the NAAQS that occurred between January 1, 2014 and July 13, 2016.

The agency’s own summary, as published.

What this changes

Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.

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