National Ambient Air Quality Standards for Sulfur Oxides (Sulfur Dioxide)Final Decision

In accordance with sections 108 and 109 of the Clean Air Act (Act), EPA has reviewed and revised the air quality criteria upon which the existing national ambient air quality standards (NAAQS) for sulfur oxides are based. Based on that review, this document announces EPA's final decision under section 109(d)(1) that revisions of the NAAQS for sulfur oxides are not appropriate at this time, aside from several minor technical changes. In lieu of the two alternatives to short-term NAAQS proposed on November 15, 1994, EPA will shortly propose revisions to 40 CFR part 51 to establish concern and intervention levels under section 303 of the Act and associated guidance to assist States in addressing short-term peaks of sulfur dioxide (SO<INF>2). Final action will be taken on proposed changes to 40 CFR parts 53 and 58 when final action is taken on the 40 CFR part 51 proposal and associated guidance.