51.1011—Requirements for mid-course review.

(a) Any State that submits to EPA an approvable attainment plan for a PM2.5 nonattainment area justifying an attainment date of nine or ten years from the date of designation also must submit to EPA a mid-course review six years from the date of designation.

(b) The mid-course review for an area must include:

(1) A review of emissions reductions and progress made in implementing control measures to reduce emissions of direct PM2.5 and PM2.5 attainment plan precursors contributing to PM2.5 concentrations in the area;

(2) An analysis of changes in ambient air quality data for the area;

(3) Revised air quality modeling analysis to demonstrate attainment;

(4) Any new or revised control measures adopted by the State, as necessary to ensure attainment by the attainment date in the approved SIP of the nonattainment area.

CFR

51.1011—Requirements for mid-course review.