2018-09318: Air Plan Approval; Indiana; Air Quality Standards Update for the 2015 Ozone Standard
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The Environmental Protection Agency (EPA) is proposing to approve a September 7, 2017, request by the Indiana Department of Environmental Management (IDEM) to revise the Indiana state implementation plan (SIP) for ozone. IDEM revised its ozone standard in order to be consistent with EPA's 2015 revisions to the 8-hour national ambient air quality standards (NAAQS). IDEM also revised the references to the monitoring test methods in its rules to the current EPA test methods. EPA is also proposing to approve administrative revisions to regulations addressing other ambient air quality standards.
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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