This article outlines the legal basis for the use of modeling in attainment status designations, focusing on historical case law supporting its use and EPA’s current unconventional approach to modeling the SO2 NAAQS.
This article appears in the August 2012 issue of EM Magazine, a publication of the Air & Waste Management Association (A&WMA; www.awma.org). To obtain copies and reprints, please contact A&WMA directly at 1-412-232-3444.