Updated September 2, 2011 page 1EGU Controls; Atlanta Nonattainment AreaPrepared by B. PearceNOx Control: Selective Catalytic Reduction (SCR), VISTAS removal efficiency = 82.5 % (VISTAS 2012 Projection Emission Inventory,MACTEC)SO2 Control: Flue Gas Desulfurization (FGD), required removal efficiency per (uuu) = 95%, VISTAS removal efficiency = 95 %(VISTAS 2012 Projection Emission Inventory, MACTEC).PM Control: ESPs began operation prior to 2007. The PM2.5 control factor due to FGD was assumed to be 50% according to Table 5.4-1on page 5.4-24 of EPA document "StationarySource Control Techniques Document for Fine ParticulateMatter" (EC/R Incorporated,1998).Control Order (Upstream to Downstream):SCR, ESP, FGDAttainment Year (Base Year) for Atlanta Maintenance Plan Emissions Inventories is 2008 [note:attainment year for other nonattainmentareas is different]Updated September 2, 2011 page 2EGU Control Dates: Atlanta PM2.5 NAAPlant/UnitCountyNOx ControlOperation (SCR)NOx Control(SCR)required byrule (sss)1SO2 ControlOperation(FGD)SO2 Control(FGD)required byrule (sss)OtherControlsCommentsBowen 1 Bartow 2001(ozone seasonoper.)6/1/10 6/1/10 6/1/10 LNB/OFAESPBowen 2 Bartow2001(ozone seasonoper.)6/1/09 5/1/09 6/1/09 LNB/OFAESPBowen 3 Bartow2002 (ozone seasonoper.)12/31/08 5/1/08 12/31/08 LNB/OFAESPBowen 4 Bartow2002 (ozone seasonoper.)12/31/08 12/1/08 12/31/08 LNB/OFAESPBranch 1 Putnam 12/31/13 12/31/13 LNBESPGA Power has filed request toGA PSC to shut down Unit 1 in20132Branch 2 Putnam12/31/13 12/31/13 LNBESPGA Power has filed request toGA PSC to shut down Unit 2 in20132Branch 3 Putnam6/1/15 6/1/15 LNBESPBranch 4 Putnam6/1/15 6/1/15 LNBESPMcDonough1Cobb 4/30/1234/30/123LNB/OFA,ESPWill replace with one gas-firedgenerating block in 2012 Q2McDonough2Cobb 12/31/11312/31/113LNB/OFA,ESPWill replace with two gas-firedgenerating blocks in 2011 Q4Updated September 2, 2011 page 3Plant/UnitCountyNOx ControlOperation (SCR)NOx Control(SCR)required byrule (sss)1SO2 ControlOperation (FGD)SO2 Control(FGD)required byrule (sss)OtherControlsCommentsWansley 1 Heard 2002 (ozone seasonoper.)12/31/08 12/1/08 12/31/08 LNB/OFAESPWansley 2 Heard 2003 (ozone seasonoper.)12/31/09 5/1/09 12/31/09 LNB/OFAESPYates 1 Coweta No requirement prior to 2008 – but notrequired12/31/08 LNBESPYates 2 - 5 Coweta No requirement No requirement ESPsYates 6 Coweta 6/1/15 6/1/15 LNBESPYates 7 Coweta 6/1/15 6/1/15 LNBESP(1) year-round operation required(2) Source: Georgia Power IntegratedResource Plan, updated August 2011(3) Georgia Power will shut downMcDonough’s coal-fired Units 1 and 2 by thesedates and replace them with three new gas-firedcombined cycle (combustion turbineand duct burner) blocks of 840 MW each. Annual potential emissions from the three generating blocks were estimated in the PSDPrelimary Determination datedNovember 2007 (see Permit Application No. 17297 and Permit 4911-067-0003-V-02-2 ). NOxemissions from each block will be controlled by an SCR and a low-NOxburner.Blk 4 annualemissionsBlk 5 annualemissionsBlk 6 annualemissionsSO2 (tons) 19 19 18NOx( tons) 217 217 200PM10 (tons) 203 203 175Updated September 2, 2011 page 4Bowen – Removal Efficiencies of Added ControlsPlant/Unit2008 ControlsNOxSO2PM/HgControls Added after2008NOxSO2PM/HgRemovalEfficiency ofAdded ControlsEfficiencyBasisRequirement foradditional controlCommentsBowen 1SCR (ozone season)LNB/OFASCR Oct - April82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1Bowen 2 SCR (ozone season)LNB/OFASCR Oct - April82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1Bowen 3SCR (ozone season)LNB/OFASCR Oct - April82.5 % VISTASinventoryRule (sss)FGD (bubbler) – SEECOMMENTFGD (bubbler) fullyear operation – SEECOMMENT95% - SEECOMMENTVISTASinventoryRules (sss) and(uuu)FGD was started up in May2008 and operated for partialyearESP FGD cobenefit50% EPA1Bowen 4SCR (ozone season)LNB/OFASCR Oct - April82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1(1) Table 5.4-1 on page 5.4-24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/RIncorporated, 1998).Updated September 2, 2011 page 5Branch – Removal Efficiencies of Added ControlsPlant/Unit2008 ControlsNOxSO2PM/HgControls Added after2008NOxSO2PM/HgRemovalEfficiency ofAdded ControlsEfficiencyBasisRequirement foradditional controlCommentsBranch 1LNB SCR82.5 % VISTASinventoryRule (sss)GPC has filed request to GA PSCto shut down Unit 1 in 2013none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1Branch 2LNB SCR82.5 % VISTASinventoryRule (sss)GPC has filed request to GA PSCto shut down Unit 2 in 2013none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1Branch 3LNB SCR82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1Branch 4LNB SCR82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1(1) Table 5.4-1 on page 5.4-24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/RIncorporated, 1998).Updated September 2, 2011 page 6Wansley – Removal Efficiencies of Added ControlsPlant/Unit2008 ControlsNOxSO2PM/HgControls Added after2008NOxSO2PM/HgRemovalEfficiency ofAdded ControlsEfficiencyBasisRequirement foradditional controlCommentsWansley 1SCR (ozone season)LNB/OFASCR Oct - April82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1Wansley 2 SCR (ozone season)LNB/OFASCR Oct - April82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1(1) Table 5.4-1 on page 5.4-24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/RIncorporated, 1998).Updated September 2, 2011 page 7Yates – Removal Efficiencies of Added ControlsPlant/Unit2008 ControlsNOxSO2PM/HgControls Added after2008NOxSO2PM/HgRemovalEfficiency ofAdded ControlsEfficiencyBasisRequirement foradditional controlCommentsYates 1LNB SCR82.5 % VISTASinventoryRule (sss)FGD (bubbler) FGD operationrequired by rule (sss)No additionalremovalVISTASinventory;CAMDrecordsRules (sss) and(uuu)CAMD SO2 emissions records for2006 – 2010 indicate that FGDoperating essentially year-roundprior to 2007.ESP, FGD cobenefit FGD operationrequired by rule (sss)No additionalremovalYates 6LNB SCR82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1Yates 7LNB SCR82.5 % VISTASinventoryRule (sss)none FGD (bubbler)95% VISTASinventoryRules (sss) and(uuu)ESP FGD cobenefit50% EPA1(1) Table 5.4-1 on page 5.4-24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/RIncorporated, 1998).