Air Plan Approval; ID, Pinehurst PM10

The EPA is approving the redesignation request and limited maintenance plan for the PM10 National Ambient Air Quality Standard developed for the City of Pinehurst PM10 Nonattainment Area and the Pinehurst PM10 Expansion Nonattainment Area. This redesignation will change the status of both areas from nonattainment to attainment. The limited maintenance plan for these contiguous nonattainment areas addresses maintenance of the PM10 standard for a ten-year period beyond redesignation. Related to this action, the EPA is taking final agency action on the September 15, 2013, high wind exceptional event at the Pinehurst monitoring station. Additionally, the EPA is finalizing approval of the emissions inventory for the West Silver Valley 2012 annual PM2.5 nonattainment area.