ANNUAL SULFUR DIOXIDE EMISSION REPORT

ANNUAL SULFUR DIOXIDE (SO2) EMISSION REPORT

PacifiCorp Company ID - 948

Huntington Power Plant Site ID - 10238

SUMMARY OF ANNUAL SO2 EMISSIONS SUBMITTED TO EPA FOR ACID RAIN PROGRAM

Component Company

ID ID Component 1999 2006 Actuals Changes Adjusted

4032 01 dry bottom tangentially fired utility boiler 2,030.4 3,196.2 2878.76 317.5 3,196.2

4033/4032 01 dry bottom tangentially fired utility boiler-oil NA 0 0.74 0.0 0.74

4034 02 dry bottom tangentially fired utility boiler 11,870.2 17,128.8 14514.73 2,614.0 17,128.8

4035/4034 02 dry bottom tangentially fired utility boiler-oil NA 0 1.17 0.0 1.17

13720 15 Auxiliary Steam Boiler for Unit #1 0.07 0.00 0 0.0 0

13721 16 Auxiliary Steam Boiler for Unit #2 0.01 0.00 0 0.0 0

13730 12 Emergency generator diesel engine for Unit #1 0.01 0.01 0.197 0.0 0.197

13731 13 Emergency generator diesel engine for Unit #2 0.01 0.01 0.14 0.0 0.14

13732 14 Emergency fire pump diesel engine 0.08 0.07 0.072 0.0 0.072

Mobile 6.631 0.0 6.631

Total 17402.44 2931.517 20333.96

CHANGES IN MONITORING OR CALCULATION METHODS

Component Company

ID ID

4032 01 dry bottom tangentially fired utility boiler

Component Company

ID ID

4033 01

Component Company

ID ID Component

4034 02

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

Requirements and Instructions. The Flow Adjustment Factor calculated was 1.18.

Explanation of Change:

Changed from Method 2 in 1999 to Method 2FH for 2006.

dry bottom tangentially fired utility boiler

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Component

dry bottom tangentially fired utility boiler-diesel

Explanation of Change:

NA, emissions are included in the CEM value for this Unit.

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

Requirements and Instructions. The Flow Adjustment Factor calculated was 1.11.

Component

Explanation of Change:

Changed from Method 2 in 1999 to Method 2F for 2006.

Huntington

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ANNUAL SULFUR DIOXIDE EMISSION REPORT

Component Company

ID ID

4035 02

Component Company

ID ID

13720 15

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Component

Auxiliary Steam Boiler for Unit #1

Explanation of Change:

This unit did not operate in 2006

Adjustment of 2006 emissions to be comparable to 1999 emissions:

NA, emissions are included in the CEM value for this Unit.

Component

dry bottom tangentially fired utility boiler

Explanation of Change:

Huntington

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ANNUAL SULFUR DIOXIDE EMISSION REPORT

Component Company

ID ID Component

13721 16

Component Company

ID ID

13730 12

Component Company

ID ID Component

13731 13

Component Company

ID ID

13732 14

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Emergency fire pump diesel engine

Explanation of Change:

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

Component

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Emergency generator diesel engine for Unit #2

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 generator diesel engine for Unit #1

Explanation of Change:

Adjustment of 2006 emissions to be comparable to 1999 emissions:

Auxiliary Steam Boiler for Unit #2

Explanation of Change:

This unit did not operate in 2006

Huntington

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