How would a 1-hour violation change the status of the Compact?
RESPONSE: Any violation of the 1-hour standard occurring after the Compact is signed does not change the status of the area, as long as the milestones in the compact continue to be met. If an area that subsequently violates the 1-hour standard after Compact signature is a maintenance area for the 1-hour standard (i.e., an area that was previously designated nonattainment for the 1-hour ozone standard, but was redesignated to attainment for that standard pursuant to section 107(d)(3)(E) of the Clean Air Act (CAA)), contingency measures in the area’s 1-hour maintenance plan would be triggered pursuant to section 175A of the CAA. If an EAC area that subsequently violates the 1-hour standard after Compact signature is not subject to a maintenance plan, EPA intends to continue working with the area to implement the Compact. EPA could consider calling for other action requiring States to address the 1-hour standard, for example, issuing a SIP call under section 110 of the CAA. If an area is
