Air Plan Approval; Indiana; Lake and Porter 2008 Ozone NAAQS Maintenance Plan Revision
air-emissions · Rule · Published 2024-01-19 · Effective 2024-03-19 · IN · 89 FR 3571
Document
Document number
2024-00790
Federal Register citation
89 FR 3571
CFR reference
40 CFR 52
Type
Rule
Action
Direct final rule.
Category
air-emissions
Publication date
2024-01-19
Effective date
2024-03-19
State
IN
EPA docket
EPA-R05-OAR-2023-0482
Abstract
The Environmental Protection Agency (EPA) is approving Indiana's September 21, 2023, state implementation plan (SIP) submission which revises the 2008 ozone maintenance plan for the Indiana portion (Lake and Porter Counties) of the Chicago Naperville, IL-IN-WI area (Chicago Naperville area). This SIP submission updates onroad vehicle emissions inventories for oxides of nitrogen (NO<INF>X</INF>) and volatile organic compounds (VOC) for the years 2019, 2030 and 2035. In addition to updated emissions inventories, this SIP submission updates the Motor Vehicle Emissions Budgets (budgets) for NO<INF>X</INF> and VOC for the years 2030 and 2035. EPA is approving the allocation of a portion of the safety margins for VOC and NO<INF>X</INF> in the ozone maintenance plan to the 2030 and 2035 budgets. Total year 2030 and 2035 emissions of NO<INF>X</INF> and VOC for the area will remain below the attainment level required by the transportation conformity regulations.