### 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: Minnesota Power - Taconite Harbor Energy Center SV002 EU002 Permitted Maximum Process Rate: N/A Max. Normal Operation Process Rate: 913 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 2 Stack 120 1044 1380 2 0 24 0 0 Unit 2 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 Total Particulate OTM - 27/28 3 365 0 Unit 2 Stack (A) Organic Condensible

Particulate OTM - 27/28 3 365 0 Unit 2 Stack (A) Filterable Particulate OTM - 27/28 3 365 0 Unit 2 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.

Total PM2.5 OTM - 27/28 3 365 0 Unit 2 Stack (A) Filterable PM2.5 OTM - 27/28 3 365 0 Unit 2 Stack (A) Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 365 0 Unit 2 Stack (A) Co2 Method 3A CO2 3 420 0 Unit 2 Stack (A) O2 Method 3A O2 3 420 0 Unit 2 Stack (A) Arsenic Method 29 3 240 0 Unit 2 Stack Selenium Method 29 3 240 0 Unit 2 Stack Nickel Method 29 3 240 0 Unit 2 Stack Mercury Method 29 3 240 0 Unit 2 Stack Manganese Method 29 3 240 0 Unit 2 Stack Antimony Method 29 3 240 0 Unit 2 Stack Cobalt Method 29 3 240 0 Unit 2 Stack Chromium Method 29 3 240 0 Unit 2 Stack Beryllium Method 29 3 240 0 Unit 2 Stack Cadmium Method 29 3 240 0 Unit 2 Stack Lead Method 29 3 240 0 Unit 2 Stack Co2 Method 3A CO2 3 300 0 Unit 2 Stack O2 Method 3A O2 3 300 0 Unit 2 Stack Filterable Particulate Method 5 3 240 0 Unit 2 Stack



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### Minnesota Power

Sampling / Stack Data Results Summary



### Location Unit 2 Stack - Method 29 Average Run Number 1 2 3
Test Date 5/17/2010 5/17/2010 5/18/2010 Run Start Time 9:00:00 AM 3:40:00 PM 6:20:00 AM Run Finish Time 1:32:00 PM 7:53:00 PM 10:40:00 AM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 119.706 120.278 120.331 120.105 Moisture Content of Stack Gas, % 11.69 11.36 11.44 11.497 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 14.9 14.8 14.7 14.800 Oxygen, % 5.5 5.6 5.7 5.600 Average Stack Gas Temperature, °F 361.83 370.79 357.04 363.220 Dry Volumetric Flow Rate, dry scfm 181,042.3 181,583.4 182,416.5 181,680.733 Actual Wet Volumetric Flue Gas Flow Rate, acfm 327,747.4 331,187.5 326,710.7 328,548.533 Percent Isokinetic of Sampling Rate, % 102.2 102.4 102.0 102.200 F-Factor, dscfm/MMBtu @ %O2 9392 9392 8329 9,037.667
Fw 0 0 0 0.000
Fc 1951 1951 1749 1,883.667



### Location Unit 2 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



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### Minnesota Power

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



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### Minnesota Power

Emissions Summary



### Location: Unit 2 Stack - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.004 0.004 0.004 0.004 lb/mmBtuO2 9.39E-07 9.41E-07 8.39E-07 0.000 

### Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.004 0.004 0.004 0.004 lb/mmBtuO2 9.39E-07 9.41E-07 8.39E-07 0.000 

### Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.00118 0.001 0.001 0.001 lb/mmBtuO2 2.77E-07 2.35E-07 2.10E-07 0.000 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.00187 0.001 0.001 0.001 lb/mmBtuO2 4.39E-07 2.35E-07 2.10E-07 0.000 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.00324 0.003 0.003 0.003 lb/mmBtuO2 7.61E-07 7.05E-07 6.29E-07 0.000 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.00165 0.00106 0.00109 0.001 lb/mmBtuO2 3.87E-07 2.49E-07 2.29E-07 0.000 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.01411 0.00501 0.00421 0.008 lb/mmBtuO2 3.31E-06 1.18E-06 8.83E-07 0.000 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.00717 0.01883 0.01857 0.015 lb/mmBtuO2 1.68E-06 4.43E-06 3.90E-06 0.000 

### Compound: Mercury Average



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### Minnesota Power

RunNumber 1 2 3 Mass_mg 0.01059 0.01455 0.01282 0.013 lb/mmBtuO2 2.49E-06 3.42E-06 2.69E-06 0.000 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.00692 0.005 0.005 0.006 lb/mmBtuO2 1.62E-06 1.18E-06 1.05E-06 0.000 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.0373 0.0222 0.0238 0.028 lb/mmBtuO2 8.76E-06 5.22E-06 4.99E-06 0.000



### Location: Unit 2 Stack - Method 5 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 23.6 28 27 26.200 lb/mmBtuO2 5.54E-03 6.58E-03 5.67E-03 0.006



### Location: Unit 2 Stack (A) - OTM - 27/28 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 23 20.5 26 23.167 lb/mmBtuO2 5.19E-03 3.93E-03 5.89E-03 0.005 

### Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 15.8 19.8 22.5 19.367 lb/mmBtuO2 3.56E-03 3.79E-03 5.10E-03 0.004 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 23.94 22.44 27.44 24.607 lb/mmBtuO2 5.40E-03 4.30E-03 6.21E-03 0.005 

### Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 3.16 2.66 3.06 2.960 lb/mmBtuO2 7.13E-04 5.10E-04 6.93E-04 0.001 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 50.1 45.6 56.5 50.733 lb/mmBtuO2 1.13E-02 8.74E-03 1.28E-02 0.011


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### Minnesota Power

Process Run Data Compound: Total PM2.5 Average RunNumber 1 2 3 Mass_mg 42.9 44.9 53 46.933 lb/mmBtuO2 9.68E-03 8.60E-03 1.20E-02 0.010



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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 768.1 MMBtu/hr Method 5/29 0


### 1 Heat Input 759.07 MMBtu/hr OTM-27/OTM-28 0
1 Gross Megawatts 71 MW OTM-27/OTM-28 0
1 Gross Megawatts 70.3 MW Method 5/29 0


### 2 Heat Input 748.63 MMBtu/hr Method 5/29 0
2 Heat Input 769.51 MMBtu/hr OTM-27/OTM-28 0
2 Gross Megawatts 73.2 MW OTM-27/OTM-28 0


### 2 Gross Megawatts 69.3 MW Method 5/29 0
3 Heat Input 756.47 MMBtu/hr Method 5/29 0
3 Heat Input 751.18 MMBtu/hr OTM-27/OTM-28 0


### 3 Gross Megawatts 72.9 MW OTM-27/OTM-28 0
3 Gross Megawatts 69.5 MW Method 5/29 0
1 Coal Firing Rate 0.0338 1000 ton/hr OTM-27/OTM-28 0


### 2 Coal Firing Rate 0.0328 1000 ton/hr OTM-27/OTM-28 0
3 Coal Firing Rate 0.0352 1000 ton/hr OTM-27/OTM-28 0
1 Coal Firing Rate 0.0338 1000 ton/hr Method 5/29 0


### 2 Coal Firing Rate 0.0338 1000 ton/hr Method 5/29 0
3 Coal Firing Rate 0.0328 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


### 1 MISCELLANEOUS CONTROL DEVICES 0 0

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### Minnesota Power

Sampling / Stack Data Results Detail



### Location Unit 2 Stack - Method 29 Average Run Number 1 2 3 Test Date 5/17/2010 5/17/2010 5/18/2010 Run Start Time 9:00:00 AM 3:40:00 PM 6:20:00 AM Run Finish Time 1:32:00 PM 7:53:00 PM 10:40:00 AM Net Traversing Points 48 48 48 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.197 0.197 0.197 0.197 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 29.2 29.19 29.26 29.217 Average Orifice Meter Differential, inches H2O 0.92 0.93 0.92 0.923 Dry Gas Meter Volume Sampled, cubic feet 127.345 130.863 127.164 128.457 Average Dry Gas Meter Temperature, °F 85.05 97.27 82.56 88.293 Dry Gas Meter Volume Sampled, dscf 119.706 120.278 120.331 120.105 Total Moisture Liquid collected, g 336.5 327.3 330.1 331.300 Volume of Water Vapor, standard cubic feet 15.84 15.41 15.54 15.597 Moisture Content of Stack Gas, % 11.69 11.36 11.44 11.497 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.8831 0.8864 0.8856 0.885 Carbon Dioxide, % 14.9 14.8 14.7 14.800 Oxygen, % 5.5 5.6 5.7 5.600 Carbon Monoxide & Nitrogen, % 79.6 79.6 79.6 79.600 Fuel Factor 1.03 1.03 1.03 Dry Molecular Weight, lb/lb-Mole 30.60 30.59 30.58 30.590 Wet Molecular weight, lb/lb-Mole 29.13 29.16 29.14 29.143 Flue Gas Static Pressure, inches of H2O -1 -1 -1 -1.000 Absolute Flue Gas Pressure, inches of Mercury 29.13 29.12 29.19 29.147 Average Stack Gas Temperature, °F 361.83 370.79 357.04 363.220 Average Velocity Head, inches of H2O 0.9686201868 97999 0.979089644

562099 0.970387922

516655 0.973
Average Stack Gas Velocity, feet/second 69.55 70.28 69.33 69.720 Stack Cross-Sectional Area, square feet 78.540 78.540 78.540 78.540 Dry Volumetric Flow Rate, dry scfm 181,042.3 181,583.4 182,416.5 181,680.733 Actual Wet Volumetric Flue Gas Flow Rate, acfm 327,747.4 331,187.5 326,710.7 328,548.533 Percent Isokinetic of Sampling Rate, % 102.2 102.4 102.0 102.200 Percent Excess Air, % 35.5 36.3 37.2 36.333 F-Factor, dscfm/MMBtu @ %O2 9392 9392 8329 9,037.667 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 1951 1951 1749 1,883.667



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### Minnesota Power

Location Unit 2 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 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



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