text: AC Activated carbon ACI Activated carbon injection CAAA Clean Air Act Amendments DCS Distributed control system ESP Electrostatic precipitator FF Fabric filter FGD Flue gas desulfurization GWe Gigawatt ( electric ) IPM Integrated Planning Model LSD Lime spray dryer LSFO Limestone forced oxidation MEL Magnesium enhanced lime MWe Megawatt ( electric ) NAAQS National Ambient Air Quality Standards PJFF Pulsejet fabric filter PLC Programmable logic controller SCR Selective catalytic reduction SIP State Implementation Plan TVA Tennessee Valley Authority
  
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  There are amendments to the Clean Air Act .