ANNUAL SULFUR DIOXIDE EMISSION REPORT

ANNUAL SULFUR DIOXIDE (SO2) EMISSION REPORT

PacifiCorp Company ID - 948Hunter Power Plant Site ID - 10237SUMMARY OF ANNUAL SO2 EMISSIONS SUBMITTED TO EPA FOR ACID RAIN PROGRAM

Component Company

ID ID Component 1999 2006 Actuals Change Adjusted

4026 1 utility boiler (coal fueled) 2,636.4 3,595.1 3298.008 297.1 3,595.1

40274026 1 utility boiler (oil fueled) NA NA 0.292 0.0 0.3

4028 2 utility boiler (coal fueled) 2,962.1 3,066.9 2533.801 533.1 3,066.9

4029/4028 2 utility boiler (oil fueled) NA NA 0.699 0.0 0.7

4030 3 utility boiler (coal fueled) 1,446.5 1,731.2 1503.534 227.7 1,731.2

4031/4030 3 utility boiler (oil fueled) NA NA 1.766 0.0 1.8

13704 15 Emergency diesel generator for Unit #1 0.008 0.011 0.011 0.0 0.013705 16 Emergency diesel generator for Unit #2 0.008 0.011 0.011 0.0 0.013707 17 Emergency diesel generator for Unit #3 0.007 0.010 0.010 0.0 0.013708 18 Emergency diesel fire pump #1 0.005 0.009 0.009 0.0 0.013709 19 Emergency diesel fire pump #2 0.005 0.010 0.010 0.0 0.0

13693 20 Auxiliary Steam Boiler, fuel oil, unit 1 0.000 0.000 0.000 0.0 0.0

Mobile 0.472 0.0 0.472Total 7338.623 1,057.9 8,396.5

CHANGES IN MONITORING OR CALCULATION METHODS

Component Company

ID ID

4026 1

Component Company

ID ID

4027 1 utility boiler (oil fueled)

Explanation of Change:

NA, emissions are included in the CEM value for this Unit.Requirements and Instructions. The Flow Adjustment Factor calculated was 1.09.

Component

Adjustment of 2006 emissions to be comparable to 1999 emissions:

The 2006 SO2 Emissions were adjusted using method 2 of the Sulfur Dioxide Milestone Inventory

Component

utility boiler (coal fueled)

Explanation of Change:

Changed from Method 2 in 1999 to Method 2FH for 2006.
ANNUAL SULFUR DIOXIDE EMISSION REPORT

Component Company

ID ID Component

4028 2

Component Company

ID ID

4029 2

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Component

utility 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 2 of the Sulfur Dioxide Milestone InventoryRequirements and Instructions. The Flow Adjustment Factor 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:
ANNUAL SULFUR DIOXIDE EMISSION REPORT

Component Company

ID ID

4030 3

Component Company

ID ID Component

4031 3

Component Company

ID ID

13704 15

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Component

Emergency diesel generator for Unit #1

Explanation of Change:

No changes, all values were calculated using AP-42 factors.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 Adjustment Factor 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 2 of the Sulfur Dioxide Milestone Inventory

Component

utility boiler (coal fueled)

Explanation of Change:

Changed from Method 2 in 1999 to Method 2FH for 2006.
ANNUAL SULFUR DIOXIDE EMISSION REPORT

Component Company

ID ID Component

13705 16

Component Company

ID ID

13707 17

Component Company

ID ID

13708 18

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Component

Emergency diesel fire pump #1

Explanation of Change:

No changes, all values were calculated using AP-42 factors.Adjustment of 2006 emissions to be comparable to 1999 emissions:No changes, all values were calculated using AP-42 factors.

Component

Emergency diesel generator for Unit #3

Explanation of Change:Adjustment of 2006 emissions to be comparable to 1999 emissions:Explanation of Change:

No changes, all values were calculated using AP-42 factors.

Emergency diesel generator for Unit #2
ANNUAL SULFUR DIOXIDE EMISSION REPORT

Component Company

ID ID Component

13709 19

Component Company

ID ID

13693 20

Adjustment of 2006 emissions to be comparable to 1999 emissions:Explanation of Change:

Unit not operated in 2006

Component

Auxiliary Steam Boiler, fuel oil, unit 1 

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Emergency diesel fire pump #2

Explanation of Change:

No changes, all values were calculated using AP-42 factors.