EPA has issued Notices and Findings of Violation (NOV/FOV) to PPG on July 10, 2013, and on February 5, 2015. EPA's investigation uncovered noncompliance with the provisions of its Title V operating permits at two of the facilities. Violations alleged in the NOV/FOVs include, among others: failure to correctly track and calculate emissions; failure to accurately maintain a permanent total enclosure; failure to establish emissions factors and operating parameters; failure to conduct compliant stack tests; an incomplete response to a Section 114 Information Request; and failure to meet an emissions limitation and required control efficiencies. This ACO will bring the facility into compliance with their operating permits and allow EPA to move forward in settlement.