A settling CAA defendant that violated PSD and nonattainment new source review regulations and standards of performance for new stationary sources at a steam-generating facility in Cleveland, Ohio, must pay a $75,000 civil penalty, perform an environmental mitigation project worth $350,000, retire all three of its coal-fired boilers, retire three of its five fuel oil-fired boilers, operate its remaining two fuel oil-fired boilers as “limited use” boilers, and install and operate new natural gas-fired boilers that are properly permitted to replace the lost capacity; the defendant will have the option to install and operate a properly permitted new, natural gas-fired cogeneration facility.