A CAA defendant responsible for multiple violations at facilities in St. Thomas and St. John must pay a $1,300,000 penalty, must use liquid propane gas or liquid natural gas and renewables to generate a high percentage of its kilowatts per hour, must implement a spare parts inventory program, must control nitrogen oxide emissions through improved operation of its water injection system, must maintain and operate continuous emissions monitoring systems on specified units, must operate a video camera system for visible emissions; must perform stack testing, and must conduct targeted self-audits and third-party audits given its long-term compliance problems.