### Name: Mr. Jason White

Title: Environmental Compliance Specialist, Company: Minnesota Power Sign Date: Name: Mr. Anthony Sakellariou Title: Lead Field Engineer Company: GE International, Inc. Sign Date: 7/30/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

## Minnesota Power 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.

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### Minnesota Power

Facility Information: Minnesota Power - Taconite Harbor Energy 8124 Highway 61 West

Schroeder, Cook Co MN 55613 Contact: Mr. Jason White Phone: 218-722-5642 Fax: 218-722-5642 Email: jwhite@mnpower.com Testing Company: GE International, Inc.
888 Industrial Drive

Elmhurst IL 60126 Contact: Mr. Anthony Sakellariou Phone: 630-530-6689 Fax: 630-530-6630 Email: anthony.sakellariou@ge.com

Air Permit Number: 03100001-006 Permitted Source ID/Name: Taconite Harbor Energy Center SV001 EU001 Permitted Maximum Process Rate: N/A Max. Normal Operation Process Rate: 847 MMBtu/hr Target Process Test Rate N/A

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: Industry/SCC/NAIS 221112

Sampling Location Information:

Test Parameter Information: AFS #: 2703100001 FRS #: 110006367172

SCC / Description 10100203 External Combustion Boilers - Electric Generation - Bituminous/Subbituminous Coal - Cyclone Furnace (Bituminous 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 Unit 1 Stack 120 1044 1380 2 0 24 0 0 Unit 1 Stack (A) 120 1044 1380 2 0 24 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 370 0 Unit 1 Stack (A) Total Particulate OTM - 27/28 3 370 0 Unit 1 Stack (A) Organic Condensible

Particulate OTM - 27/28 3 370 0 Unit 1 Stack (A)



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### Minnesota Power

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 Particulate OTM - 27/28 3 370 0 Unit 1 Stack (A) Total PM2.5 OTM - 27/28 3 370 0 Unit 1 Stack (A) Filterable PM2.5 OTM - 27/28 3 370 0 Unit 1 Stack (A) O2 Method 3A O2 3 300 0 Unit 1 Stack (A) Co2 Method 3A CO2 3 300 0 Unit 1 Stack (A) Cadmium Method 29 3 240 0 Unit 1 Stack Selenium Method 29 3 240 0 Unit 1 Stack Nickel Method 29 3 240 0 Unit 1 Stack Manganese Method 29 3 240 0 Unit 1 Stack Antimony Method 29 3 240 0 Unit 1 Stack Arsenic Method 29 3 240 0 Unit 1 Stack Cobalt Method 29 3 240 0 Unit 1 Stack Beryllium Method 29 3 240 0 Unit 1 Stack Lead Method 29 3 240 0 Unit 1 Stack Mercury Method 29 3 240 0 Unit 1 Stack Chromium Method 29 3 240 0 Unit 1 Stack Co2 Method 3A CO2 3 300 0 Unit 1 Stack O2 Method 3A O2 3 300 0 Unit 1 Stack Filterable Particulate Method 5 3 240 0 Unit 1 Stack



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### Minnesota Power

Sampling / Stack Data Results Summary



### Location Unit 1 Stack - Method 29 Average Run Number 1 2 3
Test Date 5/18/2010 5/19/2010 5/19/2010 Run Start Time 12:20:00 PM 9:25:00 AM 3:50:00 PM

Run Finish Time 4:25:00 PM 1:30:00 PM 7:53:00 PM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 119.272 124.892 124.983 123.049 Moisture Content of Stack Gas, % 11.34 11.38 11.39 11.370 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 14 14.3 14.3 14.200 Oxygen, % 6.3 6 6.1 6.133 Average Stack Gas Temperature, °F 377.27 373.19 383.31 377.923 Dry Volumetric Flow Rate, dry scfm 181,908.7 184,303.3 184,508.1 183,573.367 Actual Wet Volumetric Flue Gas Flow Rate, acfm 335,098.8 339,292.8 344,429.3 339,606.967 Percent Isokinetic of Sampling Rate, % 101.4 101.6 101.6 101.533 F-Factor, dscfm/MMBtu @ %O2 8636 7992 7992 8,206.667
Fw 0 0 0 0.000
Fc 1810 1669 1669 1,716.000



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### Minnesota Power

Location Unit 1 Stack - 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 1 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



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### Minnesota Power

Emissions Summary



### Location: Unit 1 Stack - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.004 0.004 0.004 0.004 lb/mmBtuO2 9.14E-07 7.92E-07 7.96E-07 0.000 

### Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.00597 0.00567 0.00637 0.006 lb/mmBtuO2 1.36E-06 1.12E-06 1.27E-06 0.000 

### Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.001 0.001 0.001 0.001 lb/mmBtuO2 2.29E-07 1.98E-07 1.99E-07 0.000 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.001 0.00128 0.001 0.001 lb/mmBtuO2 2.29E-07 2.53E-07 1.99E-07 0.000 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.00561 0.00541 0.00601 0.006 lb/mmBtuO2 1.28E-06 1.07E-06 1.20E-06 0.000 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.00325 0.00302 0.00347 0.003 lb/mmBtuO2 7.43E-07 5.98E-07 6.91E-07 0.000 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.01011 0.01181 0.00769 0.010 lb/mmBtuO2 2.31E-06 2.34E-06 1.53E-06 0.000 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.02417 0.02217 0.02717 0.025 lb/mmBtuO2 5.52E-06 4.39E-06 5.41E-06 0.000 

### Compound: Mercury Average



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### Minnesota Power

RunNumber 1 2 3 Mass_mg 0.02551 0.03296 0.02412 0.028 lb/mmBtuO2 5.83E-06 6.52E-06 4.80E-06 0.000 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.00824 0.00764 0.00844 0.008 lb/mmBtuO2 1.88E-06 1.51E-06 1.68E-06 0.000 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.0189 0.0256 0.0224 0.022 lb/mmBtuO2 4.32E-06 5.07E-06 4.46E-06 0.000



### Location: Unit 1 Stack - Method 5 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 91.9 90 96.8 92.900 lb/mmBtuO2 2.10E-02 1.78E-02 1.93E-02 0.019



### Location: Unit 1 Stack (A) - OTM - 27/28 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 101.9 95.5 103.8 100.400 lb/mmBtuO2 1.96E-02 2.10E-02 2.18E-02 0.021 

### Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 60.7 61 71.7 64.467 lb/mmBtuO2 1.17E-02 1.34E-02 1.50E-02 0.013 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 35.54 29.74 30.34 31.873 lb/mmBtuO2 6.83E-03 6.55E-03 6.36E-03 0.007 

### Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 4.36 2.26 2.46 3.027 lb/mmBtuO2 8.38E-04 4.98E-04 5.16E-04 0.001 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 141.8 127.5 136.6 135.300 lb/mmBtuO2 2.73E-02 2.81E-02 2.86E-02 0.028


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### Minnesota Power

Process Run Data Compound: Total PM2.5 Average RunNumber 1 2 3 Mass_mg 100.6 93 104.5 99.367 lb/mmBtuO2 1.93E-02 2.05E-02 2.19E-02 0.021



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### Minnesota Power

Process Run Data

APCD Run Data

Process Lab Run Data 

### Run Name Value UOM Comments Target Value 1 Heat Input 830.35 MMBtu/hr Method 5/29 0


### 1 Heat Input 826.06 MMBtu/hr OTM-27/OTM-28 0
1 Gross Megawatts 73.6 MW OTM-27/OTM-28 0
1 Gross Megawatts 70.7 MW Methot 5/29 0


### 2 Heat Input 831.75 MMBtu/hr Method 5/29 0
2 Heat Input 818.7 MMBtu/hr OTM-27/OTM-28 0
2 Gross Megawatts 71.8 MW OTM-27/OTM-28 0


### 2 Gross Megawatts 73.6 MW Method 5/29 0
3 Heat Input 823.7 MMBtu/hr Method 5/29 0
3 Heat Input 817.36 MMBtu/hr OTM-27/OTM-28 0


### 3 Gross Megawatts 70.7 MW OTM-27/OTM-28 0
3 Gross Megawatts 72.5 MW Method 5/29 0
1 Coal Firing Rate 0.0422 1000 ton/hr OTM-27/OTM-28 0


### 2 Coal Firing Rate 0.041 1000 ton/hr OTM-27/OTM-28 0
3 Coal Firing Rate 0.0401 1000 ton/hr OTM-27/OTM-28 0
1 Coal Firing Rate 0.0401 1000 ton/hr Method 5/29 0


### 2 Coal Firing Rate 0.0418 1000 ton/hr Method 5/29 0
3 Coal Firing Rate 0.0414 1000 ton/hr Method 5/29 0

Run Name Value UOM Comments Target Value 

### 1 ELECTROSTATIC PRECIPITATOR 0 0
1 SELECTIVE NONCATALYTIC REDUCTION FOR NOX 0 0

1 MISCELLANEOUS CONTROL DEVICES 0 0



### Tuesday, February 08, 2011 Page 9 of 12

### Minnesota Power

Sampling / Stack Data Results Detail



### Location Unit 1 Stack - Method 29 Average Run Number 1 2 3 Test Date 5/18/2010 5/19/2010 5/19/2010 Run Start Time 12:20:00 PM 9:25:00 AM 3:50:00 PM Run Finish Time 4:25:00 PM 1:30:00 PM 7:53:00 PM Net Traversing Points 48 48 48 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.197 0.2 0.2 0.199 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 29.11 29 28.95 29.020 Average Orifice Meter Differential, inches H2O 0.92 0.97 1.02 0.970 Dry Gas Meter Volume Sampled, cubic feet 126.585 130.306 134.958 130.616 Average Dry Gas Meter Temperature, °F 82.10 70.98 88.66 80.580 Dry Gas Meter Volume Sampled, dscf 119.272 124.892 124.983 123.049 Total Moisture Liquid collected, g 324 340.5 341.4 335.300 Volume of Water Vapor, standard cubic feet 15.25 16.03 16.07 15.783 Moisture Content of Stack Gas, % 11.34 11.38 11.39 11.370 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.8866 0.8862 0.8861 0.886 Carbon Dioxide, % 14 14.3 14.3 14.200 Oxygen, % 6.3 6 6.1 6.133 Carbon Monoxide & Nitrogen, % 79.7 79.7 79.6 79.667 Fuel Factor 1.04 1.04 1.03 Dry Molecular Weight, lb/lb-Mole 30.49 30.53 30.53 30.517 Wet Molecular weight, lb/lb-Mole 29.07 29.10 29.10 29.090 Flue Gas Static Pressure, inches of H2O -0.8 -0.8 -0.8 -0.800 Absolute Flue Gas Pressure, inches of Mercury 29.05 28.94 28.89 28.960 Average Stack Gas Temperature, °F 377.27 373.19 383.31 377.923 Average Velocity Head, inches of H2O 0.9889238385 06291 1.016160349

35011 1.032738064

9776 1.013
Average Stack Gas Velocity, feet/second 71.11 72.00 73.09 72.067 Stack Cross-Sectional Area, square feet 78.540 78.540 78.540 78.540 Dry Volumetric Flow Rate, dry scfm 181,908.7 184,303.3 184,508.1 183,573.367 Actual Wet Volumetric Flue Gas Flow Rate, acfm 335,098.8 339,292.8 344,429.3 339,606.967 Percent Isokinetic of Sampling Rate, % 101.4 101.6 101.6 101.533 Percent Excess Air, % 42.7 39.9 40.9 41.167 F-Factor, dscfm/MMBtu @ %O2 8636 7992 7992 8,206.667 Round Duct Diameter, inches 120 120 120 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 0 0 0 0.000 Fc 1810 1669 1669 1,716.000



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### Minnesota Power

Location Unit 1 Stack - 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



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### Minnesota Power

Location Unit 1 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



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