With respect to air pollution control, all thirteen units have electrostatic precipitator for particulate control with control efficiency of 99.9%. Only Units 12 and 13 have forced oxidation wet limestone flue gas desulfurization for sulfur dioxide control from their design with control efficiency of 95%. Units 1 to 11 do not have sulfur dioxide control from their design. Low NOx burners are used to control emission of nitrogen oxides.