Maintenance Plan for the Metro-East St. Louis Ozone Nonattainment Area for the 1997 8-Hour Ozone National Ambient Air Quality Standard (Revised)
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.