A settling CAA defendant that emitted more than 24 tons per year of organic hazardous air pollutants from a used oil processing facility located in Indianapolis, Indiana, must install, maintain, operate, and continuously monitor a carbon adsorption system to control organic emissions from its oil and wastewater processing tanks; install new tanks, oil-water separators, piping and/or ductwork; make repairs to existing tanks, oil-water separators, piping and/or ductwork to ensure all existing, new, and replacement oil processing tanks and oil-water separators are covered by fixed roofs and vented directly through a closed-vent system; and pay a $310,000 civil penalty.