air-emissions · Rule · Published 2015-08-20 · Effective 2015-10-19 · IN · 80 FR 50579
Document
Document number
2015-20528
Federal Register citation
80 FR 50579
CFR reference
40 CFR 52
Type
Rule
Action
Direct final rule.
Category
air-emissions
Publication date
2015-08-20
Effective date
2015-10-19
State
IN
EPA docket
EPA-R05-OAR-2014-0660
Abstract
The Environmental Protection Agency (EPA) is approving a revision to the Alcoa Best Available Retrofit Technology (BART) averaging time for nitrogen oxides (NO<INF>X</INF>) in the Indiana State Implementation Plan (SIP). On July 23, 2014, the Indiana Department of Environmental Management (IDEM) submitted to EPA a revision to the daily NO<INF>X</INF> emissions limits, changing from a rolling 24-hour average to a 24-hour daily average. IDEM provided a statistical analysis showing that no significant increase in emissions will occur as a result of this change. EPA is approving this SIP revision because it will not interfere with attainment or maintenance of the National Ambient Air Quality Standard (NAAQS).