### Name: Terry Graumann

Title: Manager, Environmental Services Company: Otter Tail Power Company Sign Date: 8/12/2010 Name: Ed Juers Title: Manager Company: Interpoll Laboratories, Inc. Sign Date: 6/10/2010 Permitted Facility Representative / Date Testing Company Representative / Date 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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### 8/12/2010

Facility Information: Big Stone
48450 144th St.

Big Stone City SD 57216 Contact:Mark Thoma Phone: 218-739-8526 Fax: 218-739-8629 Email: mthoma@otpco.com Testing Company: Interpoll Laboratories, Inc.
4500 Ball Road N.E.

Circle Pines MN55014 Contact:Ed Juers Phone: 763-456-6020 Fax: 763-786-7854 Email: ed.juers@interpoll-labs.com

Air Permit Number: 6098 Permitted Source ID/Name: Enter the Boiler ID of the tested boiler (left) 1 Permitted Maximum Process Rate: N/A 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: Big Stone Plant is a steam-to-electric conversion facility. The main boiler is primarily fired with subbituminous coal, and it is equipped with overfire air and a fabric filter for pollution control. Industry/SCC/NAIS 221112

Sampling Location Information:

Test Parameter Information: AFS #: FRS #: 110011493437

SCC / Description10100223 External Combustion Boilers - Electric Generation - Bituminous/Subbituminous Coal - Cyclone Furnace (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 Exit 290 2514 2583 4 0 12 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location % H2O Method 1 - 4 3 240 0 Stack Exit % H2O Method 1 - 4 3 120 0 Stack Exit % H2O Method 1 - 4 3 180 0 Stack Exit % H2O Method 1 - 4 3 480 0 Stack Exit Organic Condensible

Particulate OTM - 27/28 3 240 0 Use only for dry stacks. Delete Method 5/OTM28 tests. Stack Exit



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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. As instructed by EPA on the ICR website (https://utilitymacticr.rti.org/FAQ/FAQEmissionsTesting.aspx#TEST-021), the following modifications will be made to Method 29 for mercury measurement: 1. The procedures for preparation of mercury standards and sample analysis in sections 13.4.1.1 through 13.4.1.3 of ASTM D6784-02 will be followed instead of the procedures in sections 7.5.33 and 11.1.3 of Method 29; and 2. The QA/QC procedures in section 13.4.2 of ASTM D6784-02 will be performed instead of the procedures in section 9.2.3 of Method 29

Filterable Particulate OTM - 27/28 3 240 0 Use only for dry stacks. Delete Method 5/OTM28 tests. Stack Exit

Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 240 0 Use only for dry stacks. Delete Method 5/OTM28 tests. Stack Exit

Total PM2.5 OTM - 27/28 3 240 0 Use only for dry stacks. Delete Method 5/OTM28 tests. Stack Exit

Total Particulate OTM - 27/28 3 240 0 Use only for dry stacks. Delete Method 5/OTM28 tests. Stack Exit

Filterable PM2.5 OTM - 27/28 3 240 0 Use only for dry stacks. Delete Method 5/OTM28 tests. Stack Exit

Selenium Method 29 3 240 0 Stack Exit Arsenic Method 29 3 240 0 Stack Exit Beryllium Method 29 3 240 0 Stack Exit Cadmium Method 29 3 240 0 Stack Exit Chromium Method 29 3 240 0 Stack Exit Lead Method 29 3 240 0 Stack Exit Magnesium Method 29 3 240 0 Stack Exit Manganese Method 29 3 240 0 Stack Exit Nickel Method 29 3 240 0 Stack Exit Filterable Particulate Method 29 3 240 0 Stack Exit Antimony Method 29 3 240 0 Stack Exit Cobalt Method 29 3 240 0 Stack Exit Mercury Method 29 3 240 0 Stack Exit Co2 Method 3A CO2 3 480 0 Dilution Probe used Stack Exit O2 Method 3A O2 3 240 0 Stack Exit Co2 Method 3A CO2 3 240 0 Dilution probe used Stack Exit Co2 Method 3A CO2 3 120 0 Dilution probe used Stack Exit O2 Method 3A O2 3 120 0 Stack Exit O2 Method 3A O2 3 480 0 Stack Exit



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Sampling / Stack Data Results Summary


### Location Stack Exit - Method 29 Average Run Number 1 2 3
Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 7:30:00 AM 7:00:00 AM 7:00:00 AM

Run Finish Time 1:56:00 PM 4:11:00 PM 1:18:00 PM Net Run Time, minutes 360 360 360 Dry Gas Meter Volume Sampled, dscf 188.912 191.220 190.586 190.239 Moisture Content of Stack Gas, % 12.09 11.35 11.98 11.807 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 14.42 14.18 14.01 14.203 Oxygen, % 5.79 5.85 6.17 5.937 Average Stack Gas Temperature, °F 295.92 299.58 299.92 298.473 Dry Volumetric Flow Rate, dry scfm 1,292,840.0 1,314,383.7 1,307,406.9 1,304,876.86 7 Actual Wet Volumetric Flue Gas Flow Rate, acfm 2,216,592.9 2,261,453.2 2,301,634.8 2,259,893.63 3 Percent Isokinetic of Sampling Rate, % 99.7 99.3 99.5 99.500 F-Factor, dscfm/MMBtu @ %O2 9820 9820 9820 9,820.000
Fw 10640 10640 10640 10,640.000
Fc 1840 1840 1840 1,840.000



### Location Stack Exit - Method 3A CO2 Average Run Number
Test Date Run Start Time Run Finish Time Carbon Dioxide, % 7:30:00 AM 7:00:00 AM 7:00:00 AM

Oxygen, % Dry Volumetric Flow Rate, dry scfm Stack Exit Stack Exit Stack Exit F-Factor, dscfm/MMBtu @ %O2 0.06 0.23 0.23 0.173 Moisture, % 1 2 3 2.000 Fuel Type 0.06 -0.17 -0.4 Fw 12.529 12.445 12.196 12.390
Fc pptvw %vw %vw



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Location Stack Exit - Method 3A O2 Average Run Number 1 2 3
Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 7:30:00 AM 7:00:00 AM 7:00:00 AM

Run Finish Time 2:01:00 PM 4:17:00 PM 2:04:00 PM Carbon Dioxide, % 14.42 14.18 14.01 14.203 Oxygen, % 5.79 5.85 6.17 5.937 Dry Volumetric Flow Rate, dry scfm 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9820 9820 9820 9,820.000 Moisture, % 13.21 12.15 12.43 12.597 Fuel Type Override Override Override
Fw 10640 10640 10640 10,640.000
Fc 1800 1800 1800 1,800.000



### Location Stack Exit - 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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Emissions Summary


### Location: Stack Exit - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.022 0.022 0.022 0.022 Elb/hr 1.99E-02 2.00E-02 2.00E-02 0.020 lb/mmBtuO2 3.49E-06 3.46E-06 3.55E-06 0.000 mg/dscm 4.11E-03 4.06E-03 4.08E-03 0.004 mg/dscm@7%O2 3.78E-03 3.75E-03 3.85E-03 0.004 

### Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.0176 0.0176 0.0176 0.018 Elb/hr 1.59E-02 1.60E-02 1.60E-02 0.016 lb/mmBtuO2 2.79E-06 2.77E-06 2.84E-06 0.000 mg/dscm 3.29E-03 3.25E-03 3.26E-03 0.003 mg/dscm@7%O2 3.03E-03 3.00E-03 3.08E-03 0.003 

### Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.012 0.012 0.012 0.012 Elb/hr 1.09E-02 1.09E-02 1.09E-02 0.011 lb/mmBtuO2 1.90E-06 1.89E-06 1.93E-06 0.000 mg/dscm 2.24E-03 2.22E-03 2.22E-03 0.002 mg/dscm@7%O2 2.06E-03 2.05E-03 2.09E-03 0.002 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.011 0.011 0.011 0.011 Elb/hr 9.96E-03 1.00E-02 9.98E-03 0.010 lb/mmBtuO2 1.74E-06 1.73E-06 1.77E-06 0.000 mg/dscm 2.06E-03 2.03E-03 2.04E-03 0.002 mg/dscm@7%O2 1.90E-03 1.87E-03 1.93E-03 0.002 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.0416 0.0458 0.0414 0.043 Elb/hr 3.77E-02 4.16E-02 3.76E-02 0.039 lb/mmBtuO2 6.59E-06 7.20E-06 6.67E-06 0.000 mg/dscm 7.78E-03 8.46E-03 7.67E-03 0.008 mg/dscm@7%O2 7.16E-03 7.81E-03 7.24E-03 0.007 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.044 0.044 0.044 0.044 Elb/hr 3.98E-02 4.00E-02 3.99E-02 0.040



### Thursday, February 10, 2011 Page 6 of 15

### 8/12/2010
lb/mmBtuO2 6.97E-06 6.92E-06 7.09E-06 0.000 mg/dscm 8.23E-03 8.13E-03 8.15E-03 0.008 mg/dscm@7%O2 7.57E-03 7.51E-03 7.69E-03 0.008 

### Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 21 18.3 18.4 19.233 Elb/hr 1.90E+01 1.66E+01 1.67E+01 17.433 lb/mmBtuO2 3.33E-03 2.88E-03 2.97E-03 0.003 mg/dscm 3.93E+00 3.38E+00 3.41E+00 3.573 mg/dscm@7%O2 3.62E+00 3.12E+00 3.22E+00 3.320 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.0214 0.0216 0.0222 0.022 Elb/hr 1.94E-02 1.96E-02 2.01E-02 0.020 lb/mmBtuO2 3.39E-06 3.40E-06 3.58E-06 0.000 mg/dscm 4.00E-03 3.99E-03 4.11E-03 0.004 mg/dscm@7%O2 3.68E-03 3.69E-03 3.88E-03 0.004 

### Compound: Magnesium Average RunNumber 1 2 3 Mass_mg 0 0 0 0.000 Elb/hr 0.00E+00 0.00E+00 0.00E+00 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 0.00E+00 0.000 mg/dscm 0.00E+00 0.00E+00 0.00E+00 0.000 mg/dscm@7%O2 0.00E+00 0.00E+00 0.00E+00 0.000 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.0136 0.0178 29.608 9.880 Elb/hr 1.23E-02 1.62E-02 2.69E+01 8.976 lb/mmBtuO2 2.16E-06 2.80E-06 4.77E-03 0.002 mg/dscm 2.54E-03 3.29E-03 5.49E+00 1.832 mg/dscm@7%O2 2.34E-03 3.04E-03 5.18E+00 1.728 

### Compound: Mercury Average RunNumber 1 2 3 Mass_mg 0.03235 0.02965 0.04225 0.035 Elb/hr 2.93E-02 2.70E-02 3.83E-02 0.032 lb/mmBtuO2 5.13E-06 4.66E-06 6.81E-06 0.000 mg/dscm 6.05E-03 5.48E-03 7.83E-03 0.006 mg/dscm@7%O2 5.57E-03 5.06E-03 7.39E-03 0.006 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.011 0.012 0.011 0.011 Elb/hr 9.96E-03 1.09E-02 9.98E-03 0.010


### Thursday, February 10, 2011 Page 7 of 15

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Process Run Data lb/mmBtuO2 1.74E-06 1.89E-06 1.77E-06 0.000 mg/dscm 2.06E-03 2.22E-03 2.04E-03 0.002 mg/dscm@7%O2 1.90E-03 2.05E-03 1.93E-03 0.002 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.044 0.044 0.044 0.044 Elb/hr 3.98E-02 4.00E-02 3.99E-02 0.040 lb/mmBtuO2 6.97E-06 6.92E-06 7.09E-06 0.000 mg/dscm 8.23E-03 8.13E-03 8.15E-03 0.008 mg/dscm@7%O2 7.57E-03 7.51E-03 7.69E-03 0.008



### Location: Stack Exit - OTM - 27/28 

### Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 15.6 21.1 18.7 18.467 lb/mmBtuO2 3.73E-03 4.94E-03 4.51E-03 0.004 

### Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 4.2 11 5.7 6.967 lb/mmBtuO2 1.01E-03 2.57E-03 1.38E-03 0.002 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 35.71 30.77 26.48 30.987 lb/mmBtuO2 8.55E-03 7.20E-03 6.39E-03 0.007 

### Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 0.7 1.1 0.3 0.700 lb/mmBtuO2 1.68E-04 2.57E-04 7.24E-05 0.000 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 52.01 52.97 45.48 50.153 lb/mmBtuO2 1.24E-02 1.24E-02 1.10E-02 0.012 

### Compound: Total PM2.5 Average RunNumber 1 2 3 Mass_mg 40.61 42.87 32.48 38.653 lb/mmBtuO2 9.72E-03 1.00E-02 7.84E-03 0.009



### Thursday, February 10, 2011 Page 8 of 15

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Process Run Data



### Run Name Value UOM Comments Target Value 1 Subbituminous Coal Burned 0.2978 1000 Tons/hr Method 29 - Run 1, and Method OTM 27/28 - Run 1 0

2 Subbituminous Coal Burned 0 1000 Tons/hr 0


### 3 Subbituminous Coal Burned 0 1000 Tons/hr 0
1 Average Heat Input 5212.4 MMBtu/hr From CEMS 0
2 Average Heat Input 0 MMBtu/hr 0


### 3 Average Heat Input 0 MMBtu/hr 0
1 Steam Output 3721.81000 lb steam/hr 0
2 Steam Output 0 1000 lb steam/hr 0


### 3 Steam Output 0 1000 lb steam/hr 0
1 Flue Gas Flow Rate 7E+07 scfh Wet scfh from CEMS 0



### 1 Flue Gas Oxygen Content 2.5 % Excess Oxygen Measured at Boiler 0

1 Flue Gas Carbon Dioxide Content 12.3 % CEMS Value at Stack Exit 0



### 1 Flue Gas Sampling Point Temperature 302 Deg F 0
1 Flue Gas Pressure 0.9347 atm 0
1 Standard Pressure 1 atm 0


### 1 Standard Temperature 68 Deg F 0
1 Unit Gross Electrical Output 485 Mwe 0
1 Unit Net Electric Generation 465 MWh 0


### 4 Subbituminous Coal Burned 0.2982 1000 Tons/hr Method 29 - Run 2, and Method OTM 27/28 - Run 2 0

4 Average Heat Input 5137.5 MMBtu/hr From CEMS 0
4 Steam Output 3720.81000 lb steam/hr 0
4 Flue Gas Flow Rate 7E+07 scfh Wet scfh from CEMS 0



### 4 Flue Gas Oxygen Content 2.5 % Excess Oxygen Measured at Boiler 0

4 Flue Gas Carbon Dioxide Content 12.2 % CEMS Value at Stack Exit 0

4 Flue Gas Sampling Point Temperature 305 Deg F 0
4 Flue Gas Pressure 0.9235 atm 0



### Thursday, February 10, 2011 Page 9 of 15

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APCD Run Data 4 Standard Pressure 1 atm 0


### 4 Standard Temperature 68 Deg F 0
4 Unit Gross Electrical Output 485 Mwe 0
4 Unit Net Electric Generation 465 MWh 0


### 5 Subbituminous Coal Burned 0.2947 1000 Tons/hr Method 29 - Run 3 0
5 Average Heat Input 5216.2 MMBtu/hr From CEMS 0
5 Steam Output 3720.71000 lb steam/hr 0


### 5 Flue Gas Flow Rate 8E+07 scfh Wet scfh from CEMS 0

5 Flue Gas Oxygen Content 2.5 % Excess Oxygen Measured at Boiler 0



### 5 Flue Gas Carbon Dioxide Content 11.2 % CEMS Value at Stack exit 0

5 Flue Gas Sampling Point Temperature 301 Deg F 0


### 5 Flue Gas Pressure 0.9104 atm 0
5 Standard Pressure 1 atm 0
5 Standard Temperature 68 Deg F 0


### 5 Unit Gross Electrical Output 486 Mwe 0
5 Unit Net Electric Generation 465 MWh 0
6 Subbituminous Coal Burned 0.2946 1000 Tons/hr Method OTM 27/28 - Run 3 0



### 6 Average Heat Input 5195.8 MMBtu/hr From CEMS 0
6 Steam Output 3720.41000 lb steam/hr 0


### 6 Flue Gas Flow Rate 8E+07 scfh Wet scfh from CEMS 0

6 Flue Gas Oxygen Content 2.5 % Excess Oxygen Measured at Boiler 0



### 6 Flue Gas Carbon Dioxide Content 11.3 % CEMS Value at Stack Exit 0

6 Flue Gas Sampling Point Temperature 301 Deg F 0


### 6 Flue Gas Pressure 0.9103 atm 0
6 Standard Pressure 1 atm 0
6 Standard Temperature 68 Deg F 0


### 6 Unit Gross Electrical Output 486 Mwe 0
6 Unit Net Electric Generation 465 MWh 0

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



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Process Lab Run Data 1 FABRIC FILTER 0 0

Run Name Value UOM Comments 

### 1 Fuel Higher Heating Value 0 Btu/lb 1 Fuel Moisture 0 % 1 Fuel Mercury Content 0 ppm 

### 1 Fuel Cadmium Content 0 ppm 1 Ultimate/Proximate Analysis 0 1 Fuel Nickel Content 0 ppm 

### 1 Fuel Arsenic Content 0 ppm 1 Fuel Chromium Content 0 ppm 1 Fuel Beryllium Content 0 ppm 1 Fuel Lead Content 0 ppm 

### 1 Fuel Manganese Content 0 ppm 1 Fuel Chlorine Content 0 ppm 1 Fuel Fluorine Content 0 ppm



### Thursday, February 10, 2011 Page 11 of 15

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Sampling / Stack Data Results Detail


### Location Stack Exit - Method 29 Average Run Number 1 2 3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 7:30:00 AM 7:00:00 AM 7:00:00 AM Run Finish Time 1:56:00 PM 4:11:00 PM 1:18:00 PM Net Traversing Points 13 12 12 Net Run Time, minutes 360 360 360 Nozzle Diameter, inches 0.185 0.185 0.185 0.185 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.9954 0.9954 0.9954 0.995 Barometric Pressure, inches of Mercury 28.46 28.26 27.83 28.183 Average Orifice Meter Differential, inches H2O 0.94 0.96 1.00 0.967 Dry Gas Meter Volume Sampled, cubic feet 200.010 201.890 205.400 202.433 Average Dry Gas Meter Temperature, °F 70.58 65.42 68.25 68.083 Dry Gas Meter Volume Sampled, dscf 188.912 191.220 190.586 190.239 Total Moisture Liquid collected, g 552.054 519.993 551.052 541.033 Volume of Water Vapor, standard cubic feet 25.99 24.48 25.94 25.470 Moisture Content of Stack Gas, % 12.09 11.35 11.98 11.807 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.8791 0.8865 0.8802 0.882 Carbon Dioxide, % 14.42 14.18 14.01 14.203 Oxygen, % 5.79 5.85 6.17 5.937 Carbon Monoxide & Nitrogen, % 79.79 79.97 79.82 79.860 Fuel Factor 1.05 1.06 1.05 Dry Molecular Weight, lb/lb-Mole 30.54 30.50 30.49 30.510 Wet Molecular weight, lb/lb-Mole 29.02 29.08 28.99 29.030 Flue Gas Static Pressure, inches of H2O -0.57 -0.57 -0.57 -0.570 Absolute Flue Gas Pressure, inches of Mercury 28.42 28.22 27.79 28.143 Average Stack Gas Temperature, °F 295.92 299.58 299.92 298.473 Average Velocity Head, inches of H2O 1.3722455060 4563 1.414371290

75613 1.437744017

6323 1.408
Average Stack Gas Velocity, feet/second 80.54 82.17 83.63 82.113 Stack Cross-Sectional Area, square feet 458.694 458.694 458.694 458.694 Dry Volumetric Flow Rate, dry scfm 1,292,840.0 1,314,383.7 1,307,406.9 1,304,876.8 67 Actual Wet Volumetric Flue Gas Flow Rate, acfm 2,216,592.9 2,261,453.2 2,301,634.82,259,893.6 33 Percent Isokinetic of Sampling Rate, % 99.7 99.3 99.5 99.500 Percent Excess Air, % 37.9 38.3 41.4 39.200 F-Factor, dscfm/MMBtu @ %O2 9820 9820 9820 9,820.000 Round Duct Diameter, inches 290 290 290 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10640 10640 10640 10,640.000 Fc 1840 1840 1840 1,840.000



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Location Stack Exit - Method 3A CO2 Average Run Number Test Date Run Start Time Run Finish Time Carbon Dioxide, % 7:30:00 AM 7:00:00 AM 7:00:00 AM Oxygen, % Fuel Factor 14.4214 14.1792 14.0076 Dry Volumetric Flow Rate, dry scfm Stack Exit Stack Exit Stack Exit F-Factor, dscfm/MMBtu @ %O2 0.06 0.23 0.23 0.173 Moisture, % 1 2 3 2.000 Analyzer Make 13.21 12.15 12.43 12.597 Analyzer Model otm 27/28 RUN 1 OTM 27/28

Run 1 otm 27/28

Run 3 Analyzer Serial Number 14.42 14.18 14.01 14.203 Operating Range 3A 3A M3A Operating Units 5.79 5.85 6.17 No. Readings/Avg. 3A 3A M3A Calibration Set 410iANPDAA 410iANPDAA 410iANPDAA Calibration Pre Zero Cylinder ID 70921374 70921374 70921374 Calibration Pre Zero Cylinder Instrument Response 20 20 20 20.000 Calibration Pre Zero Cylinder Bias % % % Calibration Pre Zero Cylinder Drift 10 10 10 10.000 Calibration Pre High Cylinder ID 1 1 1 Calibration Pre High Cylinder Instrument Response 0 0 0 0.000 Calibration Pre High Cylinder Bias Nitrogen Nitrogen Nitrogen Calibration Pre High Cylinder Drift 0.02 0.02 0.03 0.023 Calibration Post Zero Cylinder ID 0.12 0 0.06 Calibration Post Zero Cylinder Instrument Response 0 0 0 0.000 Calibration Post Zero Cylinder Bias CC-79947- CO2 CC-79947-

CO2 CC-79947-

CO2 Calibration Post Zero Cylinder Drift 8.56 8.57 8.53 8.553 Calibration Post High Cylinder ID 0 0.06 -0.17 Calibration Post High Cylinder Instrument Response 0 0 0 0.000 Calibration Post High Cylinder Bias Nitrogen Nitrogen Nitrogen Calibration Post High Cylinder Drift 0.02 0.03 0.03 0.027 Cavg 0 0.06 0.06 0.040 Cavg Units 0.12 0.06 1.55 Cgas CC-79947- CO2 CC-79947-

CO2 CC-79947-

CO2 Cgas Units 8.57 8.53 8.49 Fuel Type 0.06 -0.17 -0.4 Fw 12.529 12.445 12.196 12.390 Fc pptvw %vw %vw Cgasw pptvd %vd %vd Cgasw Units Override Override Override



### Thursday, February 10, 2011 Page 13 of 15

### 8/12/2010

Location Stack Exit - Method 3A O2 Average Run Number 1 2 3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 7:30:00 AM 7:00:00 AM 7:00:00 AM Run Finish Time 2:01:00 PM 4:17:00 PM 2:04:00 PM Carbon Dioxide, % 14.42 14.18 14.01 14.203 Oxygen, % 5.79 5.85 6.17 5.937 Fuel Factor 1.05 1.06 1.05 Dry Volumetric Flow Rate, dry scfm 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9820 9820 9820 9,820.000 Moisture, % 13.21 12.15 12.43 12.597 Analyzer Make Servomex Servomex Servomex Analyzer Model 1400 1400 1400 1,400.000 Analyzer Serial Number 1420/B224 1420/392 1420/392 Operating Range 25 25 25 25.000 Operating Units % % % No. Readings/Avg. 10 10 10 10.000 Calibration Set 10 10 10 10.000 Calibration Pre Zero Cylinder ID Nitrogen Nitrogen Nitrogen Calibration Pre Zero Cylinder Instrument Response 0.07 0.04 0.05 0.053 Calibration Pre Zero Cylinder Bias 0.29 -0.14 -0.1 0.017 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC-79947-O2 CC-79947- O2CC-79947-O2
Calibration Pre High Cylinder Instrument Response 11.04 11.02 10.85 10.970 Calibration Pre High Cylinder Bias 0 -0.1 -0.91 -0.337 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Nitrogen Nitrogen Nitrogen Calibration Post Zero Cylinder Instrument Response 0.04 0.05 0.05 0.047 Calibration Post Zero Cylinder Bias -0.14 -0.1 -0.1 -0.113 Calibration Post Zero Cylinder Drift 0.43 0.04 0 0.157 Calibration Post High Cylinder ID CC-79947-O2 CC-79947- O2CC-79947-O2
Calibration Post High Cylinder Instrument Response 11.02 10.85 10.95 10.940 Calibration Post High Cylinder Bias -0.1 -0.91 -0.43 -0.480 Calibration Post High Cylinder Drift 0.1 0.81 0.48 0.463 Cavg 5.838 5.843 6.139 5.940 Cavg Units %vd %vd %vd Cgas 5.7909 5.8512 6.1676 5.937 Cgas Units %vd %vd %vd Fuel Type Override Override Override Fw 10640 10640 10640 10,640.000 Fc 1800 1800 1800 1,800.000 Cgasw 0 0 0 0.000 Cgasw Units %vw



### Thursday, February 10, 2011 Page 14 of 15

### 8/12/2010

Location Stack Exit - 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



### Thursday, February 10, 2011 Page 15 of 15