ANNUAL SULFUR DIOXIDE EMISSION REPORTANNUAL SULFUR DIOXIDE (SO2) EMISSION REPORTPacifiCorp Company ID - 948Hunter Power Plant Site ID - 10237SUMMARY OF ANNUAL SO2EMISSIONS SUBMITTED TO EPA FOR ACID RAIN PROGRAMComponentCompanyIDIDComponent19992006ActualsChangeAdjusted4026 1 utility boiler (coal fueled)2,636.4 3,595.13298.008 297.1 3,595.140274026 1 utility boiler (oil fueled)NA NA0.292 0.0 0.34028 2 utility boiler (coal fueled)2,962.1 3,066.92533.801 533.1 3,066.94029/4028 2 utility boiler (oil fueled)NA NA0.699 0.0 0.74030 3 utility boiler (coal fueled)1,446.5 1,731.21503.534 227.7 1,731.24031/4030 3 utility boiler (oil fueled)NA NA1.766 0.0 1.813704 15 Emergency diesel generator for Unit #10.008 0.0110.011 0.0 0.013705 16 Emergency diesel generator for Unit #20.008 0.0110.011 0.0 0.013707 17 Emergency diesel generator for Unit #30.007 0.0100.010 0.0 0.013708 18 Emergency diesel fire pump #10.005 0.0090.009 0.0 0.013709 19 Emergency diesel fire pump #20.005 0.0100.010 0.0 0.01369320Auxiliary Steam Boiler, fuel oil, unit 10.0000.0000.0000.00.0Mobile0.4720.00.472Total 7338.623 1,057.9 8,396.5CHANGES IN MONITORING OR CALCULATION METHODSComponentCompanyIDID4026 1ComponentCompanyIDID4027 1 utility boiler (oil fueled)Explanation of Change:NA, emissions are included in the CEM value for this Unit.Requirements and Instructions. The Flow AdjustmentFactor calculated was 1.09.ComponentAdjustment of 2006 emissions to be comparable to 1999 emissions:The 2006 SO2 Emissions were adjusted using method 2of the Sulfur Dioxide Milestone InventoryComponentutility boiler (coal fueled)Explanation of Change:Changed from Method 2 in 1999 to Method 2FH for 2006.HunterPage 1ANNUAL SULFUR DIOXIDE EMISSION REPORTComponentCompanyIDIDComponent4028 2ComponentCompanyIDID4029 2Adjustment of 2006 emissions to be comparable to 1999 emissions:Componentutility boiler (oil fueled)Explanation of Change:NA, emissions are included in the CEM value for this Unit.The 2006 SO2 Emissions were adjusted using method 2of the Sulfur Dioxide Milestone InventoryRequirements and Instructions. The Flow AdjustmentFactor calculated was 1.21.Adjustment of 2006 emissions to be comparable to 1999 emissions:utility boiler (coal fueled)Explanation of Change:Changed from Method 2 in 1999 to Method 2FH for 2006.Adjustment of 2006 emissions to be comparable to 1999 emissions:HunterPage 2ANNUAL SULFUR DIOXIDE EMISSION REPORTComponentCompanyIDID4030 3ComponentCompanyIDIDComponent4031 3ComponentCompanyIDID13704 15Adjustment of 2006 emissions to be comparable to 1999 emissions:ComponentEmergency diesel generator for Unit #1Explanation of Change:No changes, all values were calculated using AP-42factors.Adjustment of 2006 emissions to be comparable to 1999 emissions:NA, emissions are included in the CEM value for this Unit.Requirements and Instructions. The Flow AdjustmentFactor calculated was 1.15.utility boiler (oil fueled)Explanation of Change:Adjustment of 2006 emissions to be comparable to 1999 emissions:The 2006 SO2 Emissions were adjusted using method 2of the Sulfur Dioxide Milestone InventoryComponentutility boiler (coal fueled)Explanation of Change:Changed from Method 2 in 1999 to Method 2FH for 2006.HunterPage 3ANNUAL SULFUR DIOXIDE EMISSION REPORTComponentCompanyIDIDComponent13705 16ComponentCompanyIDID13707 17ComponentCompanyIDID13708 18Adjustment of 2006 emissions to be comparable to 1999 emissions:ComponentEmergency diesel fire pump #1Explanation of Change:No changes, all values were calculated using AP-42factors.Adjustment of 2006 emissions to be comparable to 1999 emissions:No changes, all values were calculated using AP-42factors.ComponentEmergency diesel generator for Unit #3Explanation of Change:Adjustment of 2006 emissions to be comparable to 1999 emissions:Explanation of Change:No changes, all values were calculated using AP-42factors.Emergency diesel generator for Unit #2HunterPage 4ANNUAL SULFUR DIOXIDE EMISSION REPORTComponentCompanyIDIDComponent13709 19ComponentCompanyIDID13693 20Adjustment of 2006 emissions to be comparable to 1999 emissions:Explanation of Change:Unit not operated in 2006ComponentAuxiliary Steam Boiler, fuel oil, unit 1Adjustment of 2006 emissions to be comparable to 1999 emissions:Emergency diesel fire pump #2Explanation of Change:No changes, all values were calculated using AP-42factors.HunterPage 5