Approval and Promulgation of Implementation Plans; Designation of Areas for Air Quality Planning Purposes; Idaho; Reclassification as Serious Nonattainment for the 2006 Fine Particulate Matter Standards

요약

The Environmental Protection Agency (EPA) is proposing to reclassify to Serious the Franklin County, Idaho portion of the multi- state Logan, Utah/Franklin county, Idaho nonattainment area (Logan UT/ ID area) for the 2006 24-hour fine particulate matter (PM 2.5 ) National Ambient Air Quality Standards (NAAQS). Our proposal is based on the EPA's determination that the Logan, UT/ID area cannot practicably attain the 2006 PM 2.5 NAAQS by the applicable Moderate area attainment date of December 31, 2015. Should the EPA finalize reclassification of the area to Serious, Idaho will be required to submit an updated emissions inventory, Best Available Control Measures (BACM)/Best Available Control Technology (BACT), and revisions to its Nonattainment New Source Review (NNSR) program within 18 months. The attainment demonstration and the remaining Serious area nonattainment plan elements will be due no later than three years after the effective date of the final action or December 31, 2018, whichever is earlier. Upon reclassification as Serious, the Logan, UT/ID PM 2.5 nonattainment area will be required to attain the standard as expeditiously as practicable, but no later than December 31, 2