Description of Areas for Air Quality Planning Purposes; State of Idaho; Correction to Boundary of the Power-Bannock Counties Particulate Matter Nonattainment Area to Exclude the Inkom Area

This action corrects EPA's announcement of the boundary of the Power-Bannock Counties PM-10 nonattainment area (particulate matter with an aerodynamic diameter less than or equal to a nominal 10 micrometers) in the State of Idaho. The boundary of the Power-Bannock Counties PM-10 nonattainment area is being corrected to exclude that portion east of the Inkom Gap, a geographic feature separating the Inkom area from the rest of the nonattainment area. New analysis of air quality data existing at the time of the original area designation indicates that the Inkom area, at the time of and prior to designation, had never violated the National Ambient Air Quality Standard (NAAQS) for PM-10. Additional current information also indicates that the Inkom area has not and is not predicted to violate the PM-10 standard into the foreseeable future. This action will remove the City of Inkom and the surrounding area from the nonattainment area. With this correction, the Part D new source review requirements of the Clean Air Act will no longer apply to sources in the Inkom area. Instead, new or modified major sources of particulate matter would be subject to the Prevention of Significant Deterioration (PSD) requirements. DATES: This action will be effective on August 12, 1996 unless adverse or critical comments are received by July 12, 1996. If the effective date is delayed, timely notice will be published in the Federal Register.