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| Compliance Profiles: Environmental Control Technologies 32 DI Plant Acid Gases (SO2) Mercury (Hg) NOx Particulates Baldwin 1 Dry FGD CaBr Overfire Air, SCR ESP, FF Baldwin 2 Dry FGD CaBr Overfire Air, SCR ESP, FF Baldwin 3 Dry FGD ACI & CaBr Low NOx burners, Overfire Air ESP, FF Havana 6 Dry FGD ACI Low NOx burners, Overfire Air, SCR ESP, FF Hennepin 1-2 Ultra low sulfur coal ACI & CaBr Low NOx burners, Overfire Air ESP, FF Wood River 4 Ultra low sulfur coal ACI & CaBr Low NOx burners, Overfire Air ESP Wood River 5 Ultra low sulfur coal ACI & CaBr Low NOx burners, Overfire Air ESP AER Plant Acid Gases (SO2) Mercury (Hg) NOx Particulates (Nox) Coffeen 1 Wet FGD Overfire Air, SCR ESP Coffeen 2 Wet FGD Overfire Air, SCR ESP Joppa Steam 1-6 ACI Low NOx burners, Separated Overfire Air except Unit 2 ESP Newton 1-2 (1) Scrubbers under construction ACI & CaBr Low NOx burners, Overfire Air ESP Duck Creek 1 Wet FGD Low NOx burners, SCR ESP E. D. Edwards 1 ACI Low NOx burners, Overfire Air ESP -upgrades planned 2014 E. D. Edwards 2 ACI Low NOx burners, Overfire Air ESP E.D. Edwards 3 ACI Low NOx burners, Overfire Air, SCR ESP (1) In order to comply with the Multi-Pollutant Standard, Ameren Energy Resources has retired two of its facilities, Meredosia and Hutsonville, and has spent $237 million on scrubbers at Newton to date, which must be completed by December 31, 2019. FGD – Flue Gas Desulphurization (“scrubber”) CaBr – Calcium Bromide ACI – Activated Charcoal Injection ESP – Electrostatic Precipitator FF – Fabric Filter SCR – Selective Catalytic Reduction Abbreviations |