Between June 1, 2014 and September 6, 2017, Royal Crown Bottling Corp (RC Transportation) violated Sections 203(a)(3)(A) and 203(a)(3)(B) of the Clean Air Act by removing and/or rendering inoperative the diesel particulate filter, engine gas recirculation, and/or on-board diagnostics systems and installing parts and/or components where a principal effect of the part or component was to bypass, defeat, or render inoperative these emission controls and emission-related elements of design on five heavy-duty diesel-engine fleet vehicles. EPA uncovered these violations through a Request for Information issued under Section 208 of the Clean Air Act on May 31, 2017 (and reissued on September 6, 2017), to which Royal Crown responded on October 31, 2017. EPA issued a Finding of Violation to Royal Crown on April 20, 2018. Royal Crown returned their five tampered trucks to compliant 'stock configurations' on or about September 2017, according to an affidavit Royal Crown provided EPA on August 29, 2018. Royal Crown has agreed to pay a penalty of $13,953 to settle this action. These violations resulted in approximately 4 tons of excess nitrogen oxide emissions.