The action addresses alleged violations of non-attainment new source review requirements of the CAA and Maine state implementation plan, in particular failures to apply for and obtain amended air licenses for major modifications performed at the Dragon cement kiln. Dragon will come into compliance with NOx requirements at the cement kiln using existing SNCR emissions controls to establish a new NOx emission rate. Dragon will subsequently apply for an air license amendment incorporating the new NOx emission rate. Dragon will also pay a penalty of $50,000.