### Name: Mr. Patrick L. Pope

Title: Vice President & Chief Operating Offi Company: Nebraska Public Power District Sign Date: 7/6/2010 Name: Mr. Jeremy Miller Title: Lead Field Engineer Company: GE International, Inc. Sign Date: 7/6/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

## Nebraska Public Power District Final Test Report for

/ / Based on information and belief formed after reasonable inquiry, I certify that the statements and information in this test report are true, accurate, and complete. I have reviewed all testing details and results in this test report and hereby certify that the test report is authentic and accurate.

Wednesday, February 23, 2011 Page 1 of 12

### Nebraska Public Power District
7/6/2010 Facility Information:
Nebraska Public Power District Sheldon Sta
4500 West Pella Road

Hallam NE 68368 Contact: Mr. Dave Darnell Phone: 402-563-5817 Fax: Email: dadarne@nppd.com Testing Company: GE International, Inc.
888 Industrial Drive

Elmhurst IL 60126 Contact: Mr. Jeffrey Daniels Phone: 630-530-6655 Fax: 630-530-6630 Email: jeffery.daniels@ge.com

Air Permit Number: Permitted Source ID/Name: NPPD Sheldon Station 3110900005 Permitted Maximum Process Rate: 1514 MMBtu/hr Max. Normal Operation Process Rate: N/A Target Process Test Rate N/A

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: Control Device: The control device is a pulse-jet baghouse. Flue Gas Flow Path: After exiting the boiler economizer, flue gas travels through a de-energized/non-functional precipitator before traveling through the air heater. After the air heater, the flue gas goes through the baghouse before exiting the stack Industry/SCC/NAIS 221112

Sampling Location Information:

Test Parameter Information: AFS #: 3110900005 FRS #: 110000447785

SCC / Description

The following state and federal regulations that apply to the proposed testing:

Location Round

Duct Diam. Distance from upstream dist. Distance from

downstream dist. Number of

Traverse Ports Equiv. Diam Min.Travers Points Rect. Duct Length /Width Unit 2 Stack A 139.38 696.9 376.33 4 0 6 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 362 0 Unit 2 Stack A

Total Particulate OTM - 27/28 3 362 0 Unit 2 Stack A Organic Condensible

Particulate OTM - 27/28 3 362 0 Unit 2 Stack A

Filterable Particulate OTM - 27/28 3 362 0 Unit 2 Stack A Total PM2.5 OTM - 27/28 3 362 0 Unit 2 Stack A



### Wednesday, February 23, 2011 Page 2 of 12

### Nebraska Public Power District
7/6/2010

The following describes any modifications and/or deviations to the applicable test methods. If alternative methods were requested, see the attachments for documentation of request AND approval, including dates.

Filterable PM2.5 OTM - 27/28 3 362 0 Unit 2 Stack A Chromium Method 29 3 240 0 Unit 2 Stack A Antimony Method 29 3 240 0 Unit 2 Stack A Arsenic Method 29 3 240 0 Unit 2 Stack A Selenium Method 29 3 240 0 Unit 2 Stack A Nickel Method 29 3 240 0 Unit 2 Stack A Mercury Method 29 3 240 0 During the Sheldon Unit 2 test runs, the boiler experienced degrading performance due to pluggage. This condition lowers the quality of combustion, thus raising the percentage of carbon carryover in the flyash due to loss-of-ignition. This condition may have affected the actual mercury emissions since carbon is known to capture some mercury in flue gas. Unit 2 Stack A

Manganese Method 29 3 240 0 Unit 2 Stack A Cobalt Method 29 3 240 0 Unit 2 Stack A Beryllium Method 29 3 240 0 Unit 2 Stack A Cadmium Method 29 3 240 0 Unit 2 Stack A Lead Method 29 3 240 0 Unit 2 Stack A O2 Method 3A O2 3 400 0 Unit 2 Stack A Co2 Method 3A CO2 3 400 0 Unit 2 Stack A O2 Method 3A O2 3 400 0 Unit 2 Stack A Co2 Method 3A CO2 3 400 0 Unit 2 Stack A Filterable Particulate Method 5 3 240 0 Unit 2 Stack A



### Wednesday, February 23, 2011 Page 3 of 12

### Nebraska Public Power District
7/6/2010 Sampling / Stack Data Results Summary



### Location Unit 2 Stack A - Method 29 Average Run Number 1 2 3
Test Date 5/11/2010 5/11/2010 5/12/2010 Run Start Time 6:38:00 AM 12:36:00 PM 6:57:00 AM

Run Finish Time 10:47:00 AM 4:46:00 PM 11:12:00 AM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 141.454 137.410 137.985 138.950 Moisture Content of Stack Gas, % 9.88 9.76 9.20 9.613 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 12.2 12.1 11.8 12.033 Oxygen, % 8 8 8.1 8.033 Average Stack Gas Temperature, °F 284.73 287.58 277.75 283.353 Dry Volumetric Flow Rate, dry scfm 294,328.3 286,993.8 290,472.8 290,598.300 Actual Wet Volumetric Flue Gas Flow Rate, acfm 490,665.7 478,268.7 476,107.2 481,680.533 Percent Isokinetic of Sampling Rate, % 101.3 100.9 100.1 100.767 F-Factor, dscfm/MMBtu @ %O2 8168 8168 9104 8,480.000
Fw 0 0 0 0.000
Fc 1674 1674 1828 1,725.333



### Wednesday, February 23, 2011 Page 4 of 12

### Nebraska Public Power District
7/6/2010
Location Unit 2 Stack A - Method 5 Average Run Number
Test Date Run Start Time
Run Finish Time Net Run Time, minutes Dry Gas Meter Volume Sampled, dscf Moisture Content of Stack Gas, % Moisture Saturation at Stack Gas Temperature, % Carbon Dioxide, % Oxygen, % Average Stack Gas Temperature, °F Dry Volumetric Flow Rate, dry scfm Actual Wet Volumetric Flue Gas Flow Rate, acfm Percent Isokinetic of Sampling Rate, % F-Factor, dscfm/MMBtu @ %O2
Fw
Fc



### Location Unit 2 Stack A - OTM - 27/28 Average Run Number
Test Date Run Start Time Run Finish Time Net Run Time, minutes Dry Gas Meter Volume Sampled, dscf Moisture Content of Stack Gas, % Moisture Saturation at Stack Gas Temperature, % Carbon Dioxide, % Oxygen, % Average Stack Gas Temperature, °F Dry Volumetric Flow Rate, dry scfm Actual Wet Volumetric Flue Gas Flow Rate, acfm Percent Isokinetic of Sampling Rate, % F-Factor, dscfm/MMBtu @ %O2
Fw
Fc



### Wednesday, February 23, 2011 Page 5 of 12

### Nebraska Public Power District
7/6/2010 Emissions Summary



### Location: Unit 2 Stack A - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.0028 0.0028 0.0028 0.003 lb/mmBtuO2 5.77E-07 5.94E-07 6.65E-07 0.000 

### Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.0028 0.0028 0.0028 0.003 lb/mmBtuO2 5.77E-07 5.94E-07 6.65E-07 0.000 

### Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.0007 0.0007 0.0007 0.001 lb/mmBtuO2 1.44E-07 1.49E-07 1.66E-07 0.000 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.00085 0.0007 0.0007 0.001 lb/mmBtuO2 1.75E-07 1.49E-07 1.66E-07 0.000 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.00361 0.00216 0.0021 0.003 lb/mmBtuO2 7.45E-07 4.59E-07 4.99E-07 0.000 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.0007 0.0007 0.0007 0.001 lb/mmBtuO2 1.44E-07 1.49E-07 1.66E-07 0.000 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.00162 0.0014 0.0014 0.001 lb/mmBtuO2 3.34E-07 2.97E-07 3.33E-07 0.000 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.00405 0.004 0.004 0.004 lb/mmBtuO2 8.35E-07 8.49E-07 9.50E-07 0.000 

### Compound: Mercury Average



### Wednesday, February 23, 2011 Page 6 of 12

### Nebraska Public Power District
7/6/2010
RunNumber 1 2 3 Mass_mg 0.002138 0.001535 0.000949 0.002 lb/mmBtuO2 4.41E-07 3.26E-07 2.25E-07 0.000 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.00574 0.00465 0.0035 0.005 lb/mmBtuO2 1.18E-06 9.87E-07 8.31E-07 0.000 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.0154 0.0088 0.007 0.010 lb/mmBtuO2 3.18E-06 1.87E-06 1.66E-06 0.000



### Location: Unit 2 Stack A - Method 5 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 4.6 2.7 2.4 3.233 lb/mmBtuO2 9.49E-04 5.73E-04 5.70E-04 0.001



### Location: Unit 2 Stack A - OTM - 27/28 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 1.5 1.5 1.3 1.433 lb/mmBtuO2 3.41E-04 3.30E-04 3.29E-04 0.000 

### Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 1 1 0.8 0.933 lb/mmBtuO2 2.27E-04 2.20E-04 2.03E-04 0.000 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 11.58 17.98 37.78 22.447 lb/mmBtuO2 2.63E-03 3.96E-03 9.57E-03 0.005 

### Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 3.52 2.12 2.72 2.787 lb/mmBtuO2 7.99E-04 4.67E-04 6.89E-04 0.001 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 16.6 21.6 41.8 26.667 lb/mmBtuO2 3.77E-03 4.75E-03 1.06E-02 0.006


### Wednesday, February 23, 2011 Page 7 of 12

### Nebraska Public Power District
7/6/2010

Process Run Data Compound: Total PM2.5 Average RunNumber 1 2 3 Mass_mg 16.1 21.1 41.3 26.167 lb/mmBtuO2 3.65E-03 4.64E-03 1.05E-02 0.006



### Wednesday, February 23, 2011 Page 8 of 12

### Nebraska Public Power District
7/6/2010 Process Run Data

APCD Run Data

Process Lab Run Data 

### Run Name Value UOM Comments Target Value 1 Total Steam Flow 728 KPPH 0


### 2 Total Steam Flow 722 KPPH 0
3 Total Steam Flow 703 KPPH 0
1 Total Coal Flow 0.128 KPPH 0


### 2 Total Coal Flow 0.127 KPPH 0
3 Total Coal Flow 0.12 KPPH 0
1 Gross Megawatts 104 MW 0


### 2 Gross Megawatts 103 MW 0
3 Gross Megawatts 100 MW 0



### Run Name Value UOM Comments Target Value 1 BAGHOUSE 0 0



### Wednesday, February 23, 2011 Page 9 of 12

### Nebraska Public Power District
7/6/2010 Sampling / Stack Data Results Detail



### Location Unit 2 Stack A - Method 29 Average Run Number 1 2 3 Test Date 5/11/2010 5/11/2010 5/12/2010 Run Start Time 6:38:00 AM 12:36:00 PM 6:57:00 AM Run Finish Time 10:47:00 AM 4:46:00 PM 11:12:00 AM Net Traversing Points 48 48 48 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.196 0.196 0.196 0.196 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.992 0.992 0.992 0.992 Barometric Pressure, inches of Mercury 28.13 28.21 28.13 28.157 Average Orifice Meter Differential, inches H2O 1.28 1.22 1.22 1.240 Dry Gas Meter Volume Sampled, cubic feet 149.955 149.153 145.839 148.316 Average Dry Gas Meter Temperature, °F 63.78 77.75 62.13 67.887 Dry Gas Meter Volume Sampled, dscf 141.454 137.410 137.985 138.950 Total Moisture Liquid collected, g 329.2 315.8 296.9 313.967 Volume of Water Vapor, standard cubic feet 15.50 14.86 13.98 14.780 Moisture Content of Stack Gas, % 9.88 9.76 9.20 9.613 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.9012 0.9024 0.908 0.904 Carbon Dioxide, % 12.2 12.1 11.8 12.033 Oxygen, % 8 8 8.1 8.033 Carbon Monoxide & Nitrogen, % 79.8 79.9 80.1 79.933 Fuel Factor 1.06 1.07 1.08 Dry Molecular Weight, lb/lb-Mole 30.27 30.26 30.21 30.247 Wet Molecular weight, lb/lb-Mole 29.06 29.06 29.09 29.070 Flue Gas Static Pressure, inches of H2O -0.5 -0.5 -0.5 -0.500 Absolute Flue Gas Pressure, inches of Mercury 28.09 28.17 28.09 28.117 Average Stack Gas Temperature, °F 284.73 287.58 277.75 283.353 Average Velocity Head, inches of H2O 1.2661962149 0634 1.201713109

18971 1.204533910

22461 1.224
Average Stack Gas Velocity, feet/second 77.18 75.23 74.89 75.767 Stack Cross-Sectional Area, square feet 105.957 105.957 105.957 105.957 Dry Volumetric Flow Rate, dry scfm 294,328.3 286,993.8 290,472.8 290,598.300 Actual Wet Volumetric Flue Gas Flow Rate, acfm 490,665.7 478,268.7 476,107.2 481,680.533 Percent Isokinetic of Sampling Rate, % 101.3 100.9 100.1 100.767 Percent Excess Air, % 61.2 61.1 62.1 61.467 F-Factor, dscfm/MMBtu @ %O2 8168 8168 9104 8,480.000 Round Duct Diameter, inches 139.38 139.38 139.38 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 0 0 0 0.000 Fc 1674 1674 1828 1,725.333



### Wednesday, February 23, 2011 Page 10 of 12

### Nebraska Public Power District
7/6/2010
Location Unit 2 Stack A - Method 5 Average Run Number Test Date Run Start Time Run Finish Time Net Traversing Points Net Run Time, minutes Nozzle Diameter, inches Pitot Tube Coefficient Dry Gas Meter Calibration Factor Barometric Pressure, inches of Mercury Average Orifice Meter Differential, inches H2O Dry Gas Meter Volume Sampled, cubic feet Average Dry Gas Meter Temperature, °F Dry Gas Meter Volume Sampled, dscf Total Moisture Liquid collected, g Volume of Water Vapor, standard cubic feet Moisture Content of Stack Gas, % Moisture Saturation at Stack Gas Temperature, % Dry Mole Fraction Carbon Dioxide, % Oxygen, % Carbon Monoxide & Nitrogen, % Fuel Factor Dry Molecular Weight, lb/lb-Mole Wet Molecular weight, lb/lb-Mole Flue Gas Static Pressure, inches of H2O Absolute Flue Gas Pressure, inches of Mercury Average Stack Gas Temperature, °F Average Velocity Head, inches of H2O Average Stack Gas Velocity, feet/second Stack Cross-Sectional Area, square feet Dry Volumetric Flow Rate, dry scfm Actual Wet Volumetric Flue Gas Flow Rate, acfm Percent Isokinetic of Sampling Rate, % Percent Excess Air, % F-Factor, dscfm/MMBtu @ %O2 Round Duct Diameter, inches Rectangular Duct Width, inches Rectangular Duct Length, inches Fw Fc



### Wednesday, February 23, 2011 Page 11 of 12

### Nebraska Public Power District
7/6/2010
Location Unit 2 Stack A - OTM - 27/28 Average Run Number Test Date Run Start Time Run Finish Time Net Traversing Points Net Run Time, minutes Nozzle Diameter, inches Pitot Tube Coefficient Dry Gas Meter Calibration Factor Barometric Pressure, inches of Mercury Average Orifice Meter Differential, inches H2O Dry Gas Meter Volume Sampled, cubic feet Average Dry Gas Meter Temperature, °F Dry Gas Meter Volume Sampled, dscf Total Moisture Liquid collected, g Volume of Water Vapor, standard cubic feet Moisture Content of Stack Gas, % Moisture Saturation at Stack Gas Temperature, % Dry Mole Fraction Carbon Dioxide, % Oxygen, % Carbon Monoxide & Nitrogen, % Fuel Factor Dry Molecular Weight, lb/lb-Mole Wet Molecular weight, lb/lb-Mole Flue Gas Static Pressure, inches of H2O Absolute Flue Gas Pressure, inches of Mercury Average Stack Gas Temperature, °F Average Velocity Head, inches of H2O Average Stack Gas Velocity, feet/second Stack Cross-Sectional Area, square feet Dry Volumetric Flow Rate, dry scfm Actual Wet Volumetric Flue Gas Flow Rate, acfm Percent Isokinetic of Sampling Rate, % Percent Excess Air, % F-Factor, dscfm/MMBtu @ %O2 Round Duct Diameter, inches Rectangular Duct Width, inches Rectangular Duct Length, inches Fw Fc



### Wednesday, February 23, 2011 Page 12 of 12