### Name: Pamela K. Graika

Title: Designated Representative (Gen. Mgr., Company: Northern States Power Company Sign Date: 9/1/2010 Name: Scott W. Banach Title: Director, Project Engineering Company: Platt environmental Services, Inc. Sign Date: 8/27/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

## Sherburne County Unit 3 MACT ICR

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.

Monday, February 21, 2011 Page 1 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010 Facility Information: Sherburne County
13999 Industrial Boulevard

Becker MN 55308 Contact: Arthur Zimmerman Phone: 612-330-7823 Fax: Email: arthur.t.zimmerman@xcelenergy.co

m Testing Company: Platt Environmental Services, Inc. 1520 Kensington Road
Suite 204
Oak Brook IL 60523 Contact: Scott Banach Phone: 630-521-9400 Fax: 630-521-9494 Email: SBanach@plattenv.com

Air Permit Number: 14100004-002 Permitted Source ID/Name: NSP - Sherburne County (EU003) 3 Permitted Maximum Process Rate: NA Max. Normal Operation Process Rate: 880-960 MW Target Process Test Rate 880-960 MW

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: Source is a wall-fired dry bottom pulverized coal boiler with separated close-coupled over-fire air and Low NOx burners for NOx control, a spray dryer absorber for SO2 control, activated carbon for mercury control, and a baghouse for particulate control. Industry/SCC/NAIS 221112

Sampling Location Information:

Test Parameter Information: AFS #: 2714100004 FRS #: 110000424700

SCC / Description 10100222 External Combustion Boilers - Electric Generation - Bituminous/Subbituminous Coal - Pulverized Coal: Dry Bottom (Subbituminous Coal)

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 Stack 354 11.5 8.5 4 0 0 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Flowrate Method 1 - 4 3 60 0 12 Sample Points Stack % H2O Method 1 - 4 3 60 0 12 Sample Points Stack Carbon Monoxide Method 10 3 60 0 1 Sample Point Stack Formaldehyde Method 0011 0 Stack Total organic compounds

(TOC) as Propane Method 25A 3 120 0 3 Sample Points Stack

Co2 Method 3A CO2 3 60 0 3 Sample Points Stack O2 Method 3A O2 3 60 0 3 Sample Points Stack


### Monday, February 21, 2011 Page 2 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010
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.



### Monday, February 21, 2011 Page 3 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010 Sampling / Stack Data Results Summary



### Location Stack - Method 0011 Average Run Number M0011-1 M0011-2 M0011-3
Test Date 4/6/2010 4/7/2010 4/7/2010 Run Start Time 1:00:00 PM 8:05:00 AM 11:10:00 AM

Run Finish Time 4:00:00 PM 10:30:00 AM 1:35:00 PM

Net Run Time, minutes 135 135 140 Dry Gas Meter Volume Sampled, dscf 71.321 66.531 72.458 70.103 Moisture Content of Stack Gas, % 14.24 14.27 13.99 14.167 Moisture Saturation at Stack Gas Temperature, % 45.64 44.01 43.97 44.540 Carbon Dioxide, % 12.8 13.1 13.1 13.000 Oxygen, % 6.9 6.2 6.2 6.433 Average Stack Gas Temperature, °F 173.08 171.79 171.75 172.207 Dry Volumetric Flow Rate, dry scfm 2,153,716.0 2,112,151.9 2,275,929.8 2,180,599.23 3 Actual Wet Volumetric Flue Gas Flow Rate, acfm 3,147,895.4 3,060,545.0 3,286,917.8 3,165,119.40 0 Percent Isokinetic of Sampling Rate, % 95.9 91.3 88.9 92.033 F-Factor, dscfm/MMBtu @ %O2 9902 9971 9964 9,945.667
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location Stack - Method 10 Average Run Number
Test Date Run Start Time Run Finish Time Carbon Dioxide, % Oxygen, % Dry Volumetric Flow Rate, dry scfm F-Factor, dscfm/MMBtu @ %O2 Moisture, % Fuel Type
Fw
Fc



### Monday, February 21, 2011 Page 4 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010
Location Stack - Method 25A Average Run Number
Test Date Run Start Time
Run Finish Time Carbon Dioxide, % Oxygen, % Dry Volumetric Flow Rate, dry scfm F-Factor, dscfm/MMBtu @ %O2 Moisture, % Fuel Type
Fw
Fc



### Location Stack - Method 3A CO2 Average Run Number
Test Date Run Start Time
Run Finish Time Carbon Dioxide, % Oxygen, % Dry Volumetric Flow Rate, dry scfm F-Factor, dscfm/MMBtu @ %O2 Moisture, % Fuel Type
Fw
Fc



### Monday, February 21, 2011 Page 5 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010
Location Stack - Method 3A O2 Average Run Number
Test Date Run Start Time
Run Finish Time Carbon Dioxide, % Oxygen, % Dry Volumetric Flow Rate, dry scfm F-Factor, dscfm/MMBtu @ %O2 Moisture, % Fuel Type
Fw
Fc



### Monday, February 21, 2011 Page 6 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010 Emissions Summary

Process Run Data 

### Location: Stack - Method 0011 Compound: Formaldehyde Average RunNumber M0011-1 M0011-2 M0011-3 Mass_mg 0.021 0.021 0.026 0.023 lb/mmBtuO2 9.60E-06 9.87E-06 1.12E-05 0.000 ppm 8.33E-03 8.93E-03 1.01E-02 0.009



### Location: Stack - Method 10 Compound: Carbon Monoxide Average Run 1 2 3 lb/mmBtuO2 1.58E-01 9.14E-02 5.58E-02 0.102 ppm 1.47E+02 8.87E+01 5.42E+01 96.633



### Location: Stack - Method 25A Compound: Total organic compounds (TOC) as Average Run 1 2 3 lb/mmBtuO2 1.74E-03 3.79E-04 2.83E-04 0.001 ppm 1.03E+00 2.33E-01 1.74E-01 0.479



### Monday, February 21, 2011 Page 7 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010 Process Run Data



### Run Name Value UOM Comments Target Value 1 Subbituminous Coal Burned 509.3 Tons/hr Run 1 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 0

1 Gross load 918.7 MW Run 1 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 880



### 1 Spray dryer absorber pressure drop 0.33 " wc Run 1 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 2.5

1 Spray dryer absorber slurry flow 127.1 gpm/module Run 1 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 25

1 Baghouse pressure drop 0 " w.c. Run 1 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 0

2 Subbituminous Coal Burned 499.9 Tons/hr Run 2 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 0



### 2 Gross load 906 MW Run 2 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 880

2 Spray dryer absorber pressure drop 0.31 " wc Run 2 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 2.5

2 Spray dryer absorber slurry flow 120.3 gpm/module Run 2 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 25

2 Baghouse pressure drop 0 " w.c. Run 2 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 0



### 3 Subbituminous Coal Burned 495.8 Tons/hr Run 3 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 0

3 Gross load 905.3 MW Run 3 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 880

3 Spray dryer absorber pressure drop 0.31 " wc Run 3 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 2.5

3 Spray dryer absorber slurry flow 123.3 gpm/module Run 3 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 25



### 3 Baghouse pressure drop 0 " w.c. Run 3 - Method 0010, 0011, 0031, 3A, 4, 6C, 18, 25A 0

Monday, February 21, 2011 Page 8 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010 APCD Run Data

Process Lab Run Data 

### Run Name Value UOM Comments Target Value 1 OVERFIRE AIR 0


### 2 OVERFIRE AIR 0
3 OVERFIRE AIR 0
1 LOW NOX BURNERS 0


### 2 LOW NOX BURNERS 0
3 LOW NOX BURNERS 0
1 SPRAY DRYER 127.1 gpm/module 25


### 2 SPRAY DRYER 120.3 gpm/module 25
3 SPRAY DRYER 123.3 gpm/module 25
1 SPRAY DRYER 0.33 " w.c. 2.5


### 2 SPRAY DRYER 0.31 " w.c. 2.5
3 SPRAY DRYER 0.31 " w.c. 2.5
1 ACTIVATED CARBON ADSORPTION 148.1 lb/hr


### 2 ACTIVATED CARBON ADSORPTION 108.2 lb/hr
3 ACTIVATED CARBON ADSORPTION 108.2 lb/hr
1 BAGHOUSE 7.1 " w.c. 0


### 2 BAGHOUSE 6.7 " w.c. 0
3 BAGHOUSE 6.7 " w.c. 0

Run Name Value UOM Comments 

### 1 Higher heating value 11841 Btu/lb 1 Moisture 26.41 % 2 Higher heating value 11502 Btu/lb 2 Moisture 23.32 % 

### 3 Higher heating value 11530 Btu/lb 3 Moisture 23.4 %



### Monday, February 21, 2011 Page 9 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010 Sampling / Stack Data Results Detail



### Location Stack - Method 0011 Average Run Number M0011-1 M0011-2 M0011-3 Test Date 4/6/2010 4/7/2010 4/7/2010 Run Start Time 1:00:00 PM 8:05:00 AM 11:10:00 AM Run Finish Time 4:00:00 PM 10:30:00 AM 1:35:00 PM Net Traversing Points 25 25 25 Net Run Time, minutes 135 135 140 Nozzle Diameter, inches 0.179 0.179 0.179 0.179 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.999 0.999 0.999 0.999 Barometric Pressure, inches of Mercury 28.65 28.85 28.85 28.783 Average Orifice Meter Differential, inches H2O 1.12 0.85 0.98 0.983 Dry Gas Meter Volume Sampled, cubic feet 75.992 69.425 74.675 73.364 Average Dry Gas Meter Temperature, °F 79.71 71.88 65.48 72.357 Dry Gas Meter Volume Sampled, dscf 71.321 66.531 72.458 70.103 Total Moisture Liquid collected, g 251.6 235.1 250.5 245.733 Volume of Water Vapor, standard cubic feet 11.84 11.07 11.79 11.567 Moisture Content of Stack Gas, % 14.24 14.27 13.99 14.167 Moisture Saturation at Stack Gas Temperature, % 45.64 44.01 43.97 44.540 Dry Mole Fraction 0.8576 0.8573 0.8601 0.858 Carbon Dioxide, % 12.8 13.1 13.1 13.000 Oxygen, % 6.9 6.2 6.2 6.433 Carbon Monoxide & Nitrogen, % 80.3 80.7 80.7 80.567 Fuel Factor 1.09 1.12 1.12 Dry Molecular Weight, lb/lb-Mole 30.32 30.34 30.34 30.333 Wet Molecular weight, lb/lb-Mole 28.57 28.58 28.61 28.587 Flue Gas Static Pressure, inches of H2O -0.4 -0.4 -0.4 -0.400 Absolute Flue Gas Pressure, inches of Mercury 28.62 28.82 28.82 28.753 Average Stack Gas Temperature, °F 173.08 171.79 171.75 172.207 Average Velocity Head, inches of H2O 1.4757839351 7869 1.408003700

44719 1.625927593

17001 1.503
Average Stack Gas Velocity, feet/second 76.76 74.63 80.15 77.180 Stack Cross-Sectional Area, square feet 683.493 683.493 683.493 683.493 Dry Volumetric Flow Rate, dry scfm 2,153,716.0 2,112,151.9 2,275,929.8 2,180,599.2 33 Actual Wet Volumetric Flue Gas Flow Rate, acfm 3,147,895.4 3,060,545.0 3,286,917.8 3,165,119.4 00 Percent Isokinetic of Sampling Rate, % 95.9 91.3 88.9 92.033 Percent Excess Air, % 48.3 41.0 41.0 43.433 F-Factor, dscfm/MMBtu @ %O2 9902 9971 9964 9,945.667 Round Duct Diameter, inches 354 354 354 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Monday, February 21, 2011 Page 10 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010
Location Stack - Method 10 Average Run Number Test Date Run Start Time Run Finish Time Carbon Dioxide, % Oxygen, % Fuel Factor Dry Volumetric Flow Rate, dry scfm F-Factor, dscfm/MMBtu @ %O2 Moisture, % Analyzer Make Analyzer Model Analyzer Serial Number Operating Range Operating Units No. Readings/Avg. Calibration Set Calibration Pre Zero Cylinder ID Calibration Pre Zero Cylinder Instrument Response Calibration Pre Zero Cylinder Bias Calibration Pre Zero Cylinder Drift Calibration Pre High Cylinder ID Calibration Pre High Cylinder Instrument Response Calibration Pre High Cylinder Bias Calibration Pre High Cylinder Drift Calibration Post Zero Cylinder ID Calibration Post Zero Cylinder Instrument Response Calibration Post Zero Cylinder Bias Calibration Post Zero Cylinder Drift Calibration Post High Cylinder ID Calibration Post High Cylinder Instrument Response Calibration Post High Cylinder Bias Calibration Post High Cylinder Drift Cavg Cavg Units Cgas Cgas Units Fuel Type Fw Fc Cgasw Cgasw Units



### Monday, February 21, 2011 Page 11 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010
Location Stack - Method 25A Average Run Number Test Date Run Start Time Run Finish Time Carbon Dioxide, % Oxygen, % Fuel Factor Dry Volumetric Flow Rate, dry scfm F-Factor, dscfm/MMBtu @ %O2 Moisture, % Analyzer Make Analyzer Model Analyzer Serial Number Operating Range Operating Units No. Readings/Avg. Calibration Set Calibration Pre Zero Cylinder ID Calibration Pre Zero Cylinder Instrument Response Calibration Pre Zero Cylinder Bias Calibration Pre Zero Cylinder Drift Calibration Pre High Cylinder ID Calibration Pre High Cylinder Instrument Response Calibration Pre High Cylinder Bias Calibration Pre High Cylinder Drift Calibration Post Zero Cylinder ID Calibration Post Zero Cylinder Instrument Response Calibration Post Zero Cylinder Bias Calibration Post Zero Cylinder Drift Calibration Post High Cylinder ID Calibration Post High Cylinder Instrument Response Calibration Post High Cylinder Bias Calibration Post High Cylinder Drift Cavg Cavg Units Cgas Cgas Units Fuel Type Fw Fc Cgasw Cgasw Units



### Monday, February 21, 2011 Page 12 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010
Location Stack - Method 3A CO2 Average Run Number Test Date Run Start Time Run Finish Time Carbon Dioxide, % Oxygen, % Fuel Factor Dry Volumetric Flow Rate, dry scfm F-Factor, dscfm/MMBtu @ %O2 Moisture, % Analyzer Make Analyzer Model Analyzer Serial Number Operating Range Operating Units No. Readings/Avg. Calibration Set Calibration Pre Zero Cylinder ID Calibration Pre Zero Cylinder Instrument Response Calibration Pre Zero Cylinder Bias Calibration Pre Zero Cylinder Drift Calibration Pre High Cylinder ID Calibration Pre High Cylinder Instrument Response Calibration Pre High Cylinder Bias Calibration Pre High Cylinder Drift Calibration Post Zero Cylinder ID Calibration Post Zero Cylinder Instrument Response Calibration Post Zero Cylinder Bias Calibration Post Zero Cylinder Drift Calibration Post High Cylinder ID Calibration Post High Cylinder Instrument Response Calibration Post High Cylinder Bias Calibration Post High Cylinder Drift Cavg Cavg Units Cgas Cgas Units Fuel Type Fw Fc Cgasw Cgasw Units



### Monday, February 21, 2011 Page 13 of 14

### Sherburne County Unit 3 MACT ICR
9/1/2010
Location Stack - Method 3A O2 Average Run Number Test Date Run Start Time Run Finish Time Carbon Dioxide, % Oxygen, % Fuel Factor Dry Volumetric Flow Rate, dry scfm F-Factor, dscfm/MMBtu @ %O2 Moisture, % Analyzer Make Analyzer Model Analyzer Serial Number Operating Range Operating Units No. Readings/Avg. Calibration Set Calibration Pre Zero Cylinder ID Calibration Pre Zero Cylinder Instrument Response Calibration Pre Zero Cylinder Bias Calibration Pre Zero Cylinder Drift Calibration Pre High Cylinder ID Calibration Pre High Cylinder Instrument Response Calibration Pre High Cylinder Bias Calibration Pre High Cylinder Drift Calibration Post Zero Cylinder ID Calibration Post Zero Cylinder Instrument Response Calibration Post Zero Cylinder Bias Calibration Post Zero Cylinder Drift Calibration Post High Cylinder ID Calibration Post High Cylinder Instrument Response Calibration Post High Cylinder Bias Calibration Post High Cylinder Drift Cavg Cavg Units Cgas Cgas Units Fuel Type Fw Fc Cgasw Cgasw Units



### Monday, February 21, 2011 Page 14 of 14