|  | | 1: |  | Title:   |  |  |  |  | Volume/Number: | 2011 August 18 |  |  |  | Issuing Agency: |  |  |  |  | Description: | This document describes Illinois Maintenance Plan for the Illinois portion of the St. Louis ozone nonattainment area (NAA), hereafter referred to as the Metro-East NAA. A Maintenance Plan is required before an area can be redesignated from nonattainment to attainment of a National Ambient Air Quality Standard (NAAQS). This document provides technical information required to support a request to redesignate the Metro-East NAA to attainment of the 1997 8-hour ozone NAAQS. This revision incorporates motor vehicle emissions estimates developed using the U.S. EPAs MOVES model. |  |  |  | Date Created: | 09-17-2015 |  |  |  | Agency ID: | AQPSTR 11-05 |  |  |  | ISL ID: | 000000056952   Original UID: 177962 FIRST WORD: Maintenance |  | 
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