Clean Air Act Promulgation of Extension of Attainment Date for PM-10 Nonattainment Area in Denver, CO

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This action serves to grant a 1-year attainment date extension for the Denver, Colorado particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers (PM-10) nonattainment area. This action is based on monitored air quality data for the national ambient air quality standard for PM-10 during the years 1992-94 and EPA's evaluation of the applicable state implementation plan (SIP).