Procedures for Processing Requests to Redesignate Areas to Attainment
This memorandum consolidates EPA's guidance regarding the processing of requests for redesignation of nonattainment areas to attainment for ozone (O3), carbon monoxide (CO), particulate matter (PM), sulfur dioxide (SO2), nitrogen dioxide (NO2), and lead (Pb). Regional offices should use this guidance as a general framework for drafting Federal Register notices pertaining to redesignation requests.