### Name:

Title: Company: Sign Date: Name: Title: Company: Sign Date: 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.

Wednesday, February 23, 2011 Page 1 of 17

### Facility Information:

A.B. Brown Generating Station
8511 Wellborn Road

Mt. Vernon IN 47620 Contact: Allen Rose
Phone: 812-491-4562
Fax:
Email: arose@vectren.com Testing Company: Platt Environmental Services, Inc. 1520 Kensington Road
Suite 204
Oak Brook IL 60523 Contact: Stuart Burton
Phone: 630-993-2100
Fax:
Email: sburton@plattenv.com

Air Permit Number: Permitted Source ID/Name: SIGECO A.B. Brown Generating Station Unit #2
Permitted Maximum Process Rate: Max. Normal Operation Process Rate: Target Process Test Rate

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 #: 1812900010 FRS #: 110022937599

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 16.25 0 0 4 0 24 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location
Custom 18 3 120 0 Unit 2 Stack Custom 0031 3 120 0 Unit 2 Stack Custom 0010 3 120 0 Unit 2 Stack Formaldehyde 316 3 120 0 Unit 2 Stack % H2O Method 1 - 4 0 Unit 2 Stack Carbon Monoxide Method 10 3 120 0 Unit 2 Stack Total organic compounds

(TOC) as Propane Method 25A 3 120 0 Unit 2 Stack



### Wednesday, February 23, 2011 Page 2 of 17

### 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.

Co2 Method 3A CO2 3 120 0 Unit 2 Stack O2 Method 3A O2 3 120 0 Unit 2 Stack Sulfur Dioxide Method 6C 3 120 0 Unit 2 Stack



### Wednesday, February 23, 2011 Page 3 of 17

### Sampling / Stack Data Results Summary



### Location Unit 2 Stack - 316 Average
Run Number M316-1 M316-2 M316-3
Test Date 2/24/2010 2/24/2010 2/24/2010
Run Start Time 8:45:00 AM 11:50:00 AM 2:40:00 PM

Run Finish Time 10:51:00 AM 1:56:00 PM 4:46:00 PM Net Run Time, minutes 120 120 120 Dry Gas Meter Volume Sampled, dscf 70.403 69.707 70.094 70.068 Moisture Content of Stack Gas, % 14.09 13.90 14.18 14.057 Moisture Saturation at Stack Gas Temperature, % 14.70 14.77 14.77 14.747 Carbon Dioxide, % 12.91 13.08 13.211 13.067 Oxygen, % 5.6841 5.671 5.4732 5.609 Average Stack Gas Temperature, °F 127.83 128.00 128.00 127.943 Dry Volumetric Flow Rate, dry scfm 4,020.0 4,023.8 4,037.9 4,027.233 Actual Wet Volumetric Flue Gas Flow Rate, acfm 5,376.7 5,371.5 5,407.8 5,385.333 Percent Isokinetic of Sampling Rate, % 95.4 94.3 94.5 94.733 F-Factor, dscfm/MMBtu @ %O2 9737 9696 9835 9,756.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Wednesday, February 23, 2011 Page 4 of 17

### Location Unit 2 Stack - Method 1 - 4 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 - Method 10 Average Run Number
Test Date Unit 2 Stack Unit 2 Stack Unit 2 Stack

Run Start Time Method 10 Method 10 Method 10
Run Finish Time 1 2 3 Carbon Dioxide, % Oxygen, % Dry Volumetric Flow Rate, dry scfm 2/24/2010 2/24/2010 2/24/2010 F-Factor, dscfm/MMBtu @ %O2 456.1606 467.3065 600.2402 507.902 Moisture, % 10:54:00 AM 1:49:00 PM 4:39:00 PM Fuel Type ppmvd ppmvd ppmvd
Fw ppmvd ppmvd ppmvd
Fc Override Override Override



### Wednesday, February 23, 2011 Page 5 of 17

### Location Unit 2 Stack - Method 25A Average

Run Number 1 2 3
Test Date 2/24/2010 2/24/2010 2/24/2010
Run Start Time 8:45:00 AM 11:50:00 AM 2:40:00 PM

Run Finish Time 10:44:00 AM 1:49:00 PM 4:39:00 PM Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 5.6841 5.671 5.473 5.609 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9737 9696 9835 9,756.000 Moisture, % 14.1 13.2 14.2 13.833 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location Unit 2 Stack - Method 3A CO2 Average Run Number 1 2 3
Test Date 2/24/2010 2/24/2010 2/24/2010
Run Start Time 8:45:00 AM 11:50:00 AM 2:40:00 PM

Run Finish Time 10:54:00 AM 1:49:00 PM 4:39:00 PM Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 0 0 0 0.000 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Moisture, % 0 0 0 0.000 Fuel Type
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Wednesday, February 23, 2011 Page 6 of 17

### Location Unit 2 Stack - Method 3A O2 Average

Run Number 1 2 3
Test Date 2/24/2010 2/24/2010 2/24/2010
Run Start Time 8:45:00 AM 11:50:00 AM 2:40:00 PM

Run Finish Time 10:54:00 AM 1:49:00 PM 4:39:00 PM Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 5.6841 5.671 5.4732 5.609 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Moisture, % 0 0 0 0.000 Fuel Type
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Wednesday, February 23, 2011 Page 7 of 17

### Emissions Summary



### Location: Stack #1 - Method 29 Compound: Antimony Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.0028 0.0028 0.0028 0.003 Elb/hr 1.24E-03 1.24E-03 1.23E-03 0.001 gr/dscf 2.49E-07 2.48E-07 2.53E-07 0.000 lb/mmBtuO2 4.89E-07 4.84E-07 5.03E-07 0.000 mg/dscm 5.71E-04 5.67E-04 5.78E-04 0.001 ppm 1.13E-04 1.12E-04 1.14E-04 0.000


### Compound: Arsenic Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.0204 0.0215 0.0182 0.020 Elb/hr 9.04E-03 9.52E-03 8.01E-03 0.009 gr/dscf 1.82E-06 1.90E-06 1.64E-06 0.000 lb/mmBtuO2 3.56E-06 3.72E-06 3.27E-06 0.000 mg/dscm 4.16E-03 4.35E-03 3.76E-03 0.004 ppm 1.33E-03 1.40E-03 1.21E-03 0.001


### Compound: Beryllium Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.0007 0.0007 0.0007 0.001 Elb/hr 3.10E-04 3.10E-04 3.08E-04 0.000 gr/dscf 6.23E-08 6.19E-08 6.31E-08 0.000 lb/mmBtuO2 1.22E-07 1.21E-07 1.26E-07 0.000 mg/dscm 1.43E-04 1.42E-04 1.44E-04 0.000 ppm 3.81E-04 3.78E-04 3.86E-04 0.000


### Compound: Cadmium Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.0007 0.00071 0.0007 0.001 Elb/hr 3.10E-04 3.15E-04 3.08E-04 0.000 gr/dscf 6.23E-08 6.28E-08 6.31E-08 0.000 lb/mmBtuO2 1.22E-07 1.23E-07 1.26E-07 0.000 mg/dscm 1.43E-04 1.44E-04 1.44E-04 0.000 ppm 3.05E-05 3.07E-05 3.09E-05 0.000


### Compound: Chromium Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.25032 0.42965 0.29402 0.325 Elb/hr 1.11E-01 1.90E-01 1.29E-01 0.143 gr/dscf 2.23E-05 3.80E-05 2.65E-05 0.000 lb/mmBtuO2 4.37E-05 7.43E-05 5.28E-05 0.000 mg/dscm 5.10E-02 8.69E-02 6.07E-02 0.066 ppm 2.36E-02 4.02E-02 2.81E-02 0.031



### Wednesday, February 23, 2011 Page 8 of 17

### Compound: Cobalt Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.00328 0.00421 0.0037 0.004 Elb/hr 1.45E-03 1.86E-03 1.63E-03 0.002 gr/dscf 2.92E-07 3.72E-07 3.34E-07 0.000 lb/mmBtuO2 5.72E-07 7.28E-07 6.65E-07 0.000 mg/dscm 6.69E-04 8.52E-04 7.64E-04 0.001 ppm 2.73E-04 3.48E-04 3.12E-04 0.000


### Compound: Lead Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.00155 0.00179 0.00214 0.002 Elb/hr 6.87E-04 7.93E-04 9.42E-04 0.001 gr/dscf 1.38E-07 1.58E-07 1.93E-07 0.000 lb/mmBtuO2 2.70E-07 3.09E-07 3.84E-07 0.000 mg/dscm 3.16E-04 3.62E-04 4.42E-04 0.000 ppm 3.67E-05 4.20E-05 5.13E-05 0.000


### Compound: Manganese Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.0268 0.0474 0.03213 0.035 Elb/hr 1.19E-02 2.10E-02 1.41E-02 0.016 gr/dscf 2.39E-06 4.19E-06 2.90E-06 0.000 lb/mmBtuO2 4.68E-06 8.20E-06 5.77E-06 0.000 mg/dscm 5.46E-03 9.59E-03 6.63E-03 0.007 ppm 2.39E-03 4.20E-03 2.90E-03 0.003


### Compound: Nickel Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.23575 0.26955 0.23945 0.248 Elb/hr 1.05E-01 1.19E-01 1.05E-01 0.110 gr/dscf 2.10E-05 2.38E-05 2.16E-05 0.000 lb/mmBtuO2 4.11E-05 4.66E-05 4.30E-05 0.000 mg/dscm 4.81E-02 5.45E-02 4.94E-02 0.051 ppm 1.97E-02 2.23E-02 2.02E-02 0.021


### Compound: Selenium Average RunNumber M29-1 M29-2 M29-3 Mass_mg 0.0691 0.1277 0.0989 0.099 Elb/hr 3.06E-02 5.66E-02 4.36E-02 0.044 gr/dscf 6.15E-06 1.13E-05 8.92E-06 0.000 lb/mmBtuO2 1.21E-05 2.21E-05 1.78E-05 0.000 mg/dscm 1.41E-02 2.58E-02 2.04E-02 0.020 ppm 4.29E-03 7.87E-03 6.22E-03 0.006



### Location: Stack #1 - Method 5/OTM-28 Compound: Total Particulate Average



### Wednesday, February 23, 2011 Page 9 of 17

### Process Run Data RunNumber M5B/OTM28-1 M5B/OTM28-2 M5B/OTM28-3 Mass_mg 77.6 106 89.3 90.967 Elb/hr 3.63E+01 4.90E+01 4.16E+01 42.300 gr/dscf 7.17E-03 9.68E-03 8.14E-03 0.008 lb/mmBtuO2 1.41E-02 1.93E-02 1.64E-02 0.017 mg/dscm 1.64E+01 2.22E+01 1.86E+01 19.067



### Wednesday, February 23, 2011 Page 10 of 17

### Process Run Data

APCD Run Data

Process Lab Run Data



### Wednesday, February 23, 2011 Page 11 of 17

### Sampling / Stack Data Results Detail



### Location Unit 2 Stack - 316 Average Run Number M316-1 M316-2 M316-3 Test Date 2/24/2010 2/24/2010 2/24/2010 Run Start Time 8:45:00 AM 11:50:00 AM 2:40:00 PM Run Finish Time 10:51:00 AM 1:56:00 PM 4:46:00 PM Net Traversing Points 28 28 28 Net Run Time, minutes 120 120 120 Nozzle Diameter, inches 0.201 0.201 0.201 0.201 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.006 1.006 1.006 1.006 Barometric Pressure, inches of Mercury 29.28 29.28 29.28 29.280 Average Orifice Meter Differential, inches H2O 1.14 1.14 1.16 1.147 Dry Gas Meter Volume Sampled, cubic feet 71.283 71.280 71.721 71.428 Average Dry Gas Meter Temperature, °F 67.81 73.06 73.42 71.430 Dry Gas Meter Volume Sampled, dscf 70.403 69.707 70.094 70.068 Total Moisture Liquid collected, g 245.4 239 246 243.467 Volume of Water Vapor, standard cubic feet 11.55 11.25 11.58 11.460 Moisture Content of Stack Gas, % 14.09 13.90 14.18 14.057 Moisture Saturation at Stack Gas Temperature, % 14.70 14.77 14.77 14.747 Dry Mole Fraction 0.8591 0.861 0.8582 0.859 Carbon Dioxide, % 12.91 13.08 13.211 13.067 Oxygen, % 5.6841 5.671 5.4732 5.609 Carbon Monoxide & Nitrogen, % 81.4059 81.249 81.3158 81.324 Fuel Factor 1.18 1.16 1.17 Dry Molecular Weight, lb/lb-Mole 30.29 30.32 30.33 30.313 Wet Molecular weight, lb/lb-Mole 28.56 28.61 28.58 28.583 Flue Gas Static Pressure, inches of H2O -4 -4 -4 -4.000 Absolute Flue Gas Pressure, inches of Mercury 28.99 28.99 28.99 28.990 Average Stack Gas Temperature, °F 127.83 128.00 128.00 127.943 Average Velocity Head, inches of H2O 1.0576123517 3238 1.057313199

97045 1.070578783

8421 1.062

Average Stack Gas Velocity, feet/second 62.23 62.17 62.59 62.330 Stack Cross-Sectional Area, square feet 1.440 1.440 1.440 1.440 Dry Volumetric Flow Rate, dry scfm 4,020.0 4,023.8 4,037.9 4,027.233 Actual Wet Volumetric Flue Gas Flow Rate, acfm 5,376.7 5,371.5 5,407.8 5,385.333 Percent Isokinetic of Sampling Rate, % 95.4 94.3 94.5 94.733 Percent Excess Air, % 36.0 35.9 34.2 35.367 F-Factor, dscfm/MMBtu @ %O2 9737 9696 9835 9,756.000 Round Duct Diameter, inches 16.25 16.25 16.25 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



### Wednesday, February 23, 2011 Page 12 of 17

### Location Unit 2 Stack - Method 1 - 4 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 13 of 17

### Location Unit 2 Stack - Method 10 Average

Run Number Test Date Unit 2 Stack Unit 2 Stack Unit 2 Stack Run Start Time Method 10 Method 10 Method 10 Run Finish Time 1 2 3 Carbon Dioxide, % Oxygen, % Fuel Factor 9737 9696 9835 Dry Volumetric Flow Rate, dry scfm 2/24/2010 2/24/2010 2/24/2010 F-Factor, dscfm/MMBtu @ %O2 456.1606 467.3065 600.2402 507.902 Moisture, % 10:54:00 AM 1:49:00 PM 4:39:00 PM Analyzer Make Analyzer Model 5.6841 5.671 5.4732 5.609 Analyzer Serial Number Operating Range Thermo Thermo Thermo Operating Units 48I 48I 48I No. Readings/Avg. 48I-ANPAA 48I-ANPAA 48I-ANPAA Calibration Set ppm ppm ppm Calibration Pre Zero Cylinder ID 120 120 120 Calibration Pre Zero Cylinder Instrument Response 1 1 1 1.000 Calibration Pre Zero Cylinder Bias 2 2 2 2.000 Calibration Pre Zero Cylinder Drift CC240000 CC240000 CC240000 Calibration Pre High Cylinder ID 0.2 -0.8 -0.7 Calibration Pre High Cylinder Instrument Response -0.07 -0.18 -0.17 -0.140 Calibration Pre High Cylinder Bias 0 0 0 0.000 Calibration Pre High Cylinder Drift XCO334707B XCO334707 B XCO334707

B Calibration Post Zero Cylinder ID 461.8 459.2 458.7 Calibration Post Zero Cylinder Instrument Response 0.4 0.11 0.06 0.190 Calibration Post Zero Cylinder Bias 0 0 0 0.000 Calibration Post Zero Cylinder Drift CC240000 CC240000 CC240000 Calibration Post High Cylinder ID -0.8 -0.7 -0.4 Calibration Post High Cylinder Instrument Response -0.18 -0.17 -0.13 -0.160 Calibration Post High Cylinder Bias 0.11 9.999999999 99998E-03 0.04 0.053

Calibration Post High Cylinder Drift XCO334707B XCO334707 B XCO334707

B Cavg 459.2 458.7 459.3 459.067 Cavg Units 0.11 0.06 0.12 Cgas 0.29 0.05 0.06 0.133 Cgas Units 461.3 471 605.2 Fuel Type ppmvd ppmvd ppmvd Fw ppmvd ppmvd ppmvd Fc Override Override Override Cgasw 0 0 0 0.000 Cgasw Units 0 0 0



### Wednesday, February 23, 2011 Page 14 of 17

### Location Unit 2 Stack - Method 25A Average

Run Number 1 2 3 Test Date 2/24/2010 2/24/2010 2/24/2010 Run Start Time 8:45:00 AM 11:50:00 AM 2:40:00 PM Run Finish Time 10:44:00 AM 1:49:00 PM 4:39:00 PM Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 5.6841 5.671 5.473 5.609 Fuel Factor 0 0 0 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9737 9696 9835 9,756.000 Moisture, % 14.1 13.2 14.2 13.833 Analyzer Make VIG VIG VIG Analyzer Model 200 200 200 200.000 Analyzer Serial Number R19802 R19802 R19802 Operating Range 38 38 38 38.000 Operating Units ppm ppm ppm No. Readings/Avg. 120 120 120 120.000 Calibration Set 4 4 4 4.000 Calibration Pre Zero Cylinder ID CC240000 CC240000 CC240000 Calibration Pre Zero Cylinder Instrument Response 0.13 0.11 0.06 0.100 Calibration Pre Zero Cylinder Bias 0.39 0.34 0.21 0.313 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC158728 CC158728 CC158728 Calibration Pre High Cylinder Instrument Response 10.08 10.12 10.19 10.130 Calibration Pre High Cylinder Bias -0.45 -0.34 -0.16 -0.317 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID CC240000 CC240000 CC240000 Calibration Post Zero Cylinder Instrument Response 0.11 0.06 0.19 0.120 Calibration Post Zero Cylinder Bias 0.34 0.21 0.55 0.367 Calibration Post Zero Cylinder Drift 0.05 0.13 0.34 0.173 Calibration Post High Cylinder ID CC158728 CC158728 CC158728 Calibration Post High Cylinder Instrument Response 10.12 10.19 10.09 10.133 Calibration Post High Cylinder Bias -0.34 -0.16 -0.42 -0.307 Calibration Post High Cylinder Drift 0.11 0.18 0.26 0.183 Cavg 5.17 3.4 3.56 4.043 Cavg Units ppmvw ppmvw ppmvw Cgas 5.9555 3.8343 4.0415 4.610 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 5.1157815631 2625 3.328167825

22344 3.467583624

56316 3.971

Cgasw Units ppmvw ppmvw ppmvw



### Wednesday, February 23, 2011 Page 15 of 17

### Location Unit 2 Stack - Method 3A CO2 Average

Run Number 1 2 3 Test Date 2/24/2010 2/24/2010 2/24/2010 Run Start Time 8:45:00 AM 11:50:00 AM 2:40:00 PM Run Finish Time 10:54:00 AM 1:49:00 PM 4:39:00 PM Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 0 0 0 0.000 Fuel Factor 0 0 0 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Moisture, % 0 0 0 0.000 Analyzer Make Servomex Servomex Servomex Analyzer Model 0114OD1 0144OD1 0144OD1 Analyzer Serial Number 3790 3790 3790 3,790.000 Operating Range 19.2 19.2 19.2 19.200 Operating Units % % % No. Readings/Avg. 120 120 120 120.000 Calibration Set 0 0 0 0.000 Calibration Pre Zero Cylinder ID CC240000 CC240000 CC240000 Calibration Pre Zero Cylinder Instrument Response 0.01 0.03 0.03 0.023 Calibration Pre Zero Cylinder Bias 0 0.1 0.1 0.067 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC287521 CC287521 CC287521 Calibration Pre High Cylinder Instrument Response 9.85 9.81 9.75 9.803 Calibration Pre High Cylinder Bias -0.05 -0.26 -0.57 -0.293 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID CC240000 CC240000 CC240000 Calibration Post Zero Cylinder Instrument Response 0.03 0.03 0.04 0.033 Calibration Post Zero Cylinder Bias 0.1 0.1 0.16 0.120 Calibration Post Zero Cylinder Drift 0.1 0 0.06 0.053 Calibration Post High Cylinder ID CC287521 CC287521 CC287521 Calibration Post High Cylinder Instrument Response 9.81 9.75 9.62 9.727 Calibration Post High Cylinder Bias -0.26 -0.57 -1.25 -0.693 Calibration Post High Cylinder Drift 0.21 0.31 0.68 0.400 Cavg 12.9 13 13 12.967 Cavg Units %vd %vd %vd Cgas 12.9102 13.0804 13.2109 13.067 Cgas Units %vd %vd %vd Fuel Type Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Wednesday, February 23, 2011 Page 16 of 17

### Location Unit 2 Stack - Method 3A O2 Average

Run Number 1 2 3 Test Date 2/24/2010 2/24/2010 2/24/2010 Run Start Time 8:45:00 AM 11:50:00 AM 2:40:00 PM Run Finish Time 10:54:00 AM 1:49:00 PM 4:39:00 PM Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 5.6841 5.671 5.4732 5.609 Fuel Factor 0 0 0 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Moisture, % 0 0 0 0.000 Analyzer Make Servomex Servomex Servomex Analyzer Model 0144OD1 0144OD1 0144OD1 Analyzer Serial Number 3790 3790 3790 3,790.000 Operating Range 22.5 22.5 22.5 22.500 Operating Units % % % No. Readings/Avg. 120 120 120 120.000 Calibration Set 5 5 5 5.000 Calibration Pre Zero Cylinder ID CC240000 CC240000 CC240000 Calibration Pre Zero Cylinder Instrument Response 0.02 0.01 0.01 0.013 Calibration Pre Zero Cylinder Bias -0.09 -0.13 -0.13 -0.117 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC266906 CC266906 CC266906 Calibration Pre High Cylinder Instrument Response 12.5 12.37 12.35 12.407 Calibration Pre High Cylinder Bias 0.67 0.09 0 0.253 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID CC240000 CC240000 CC240000 Calibration Post Zero Cylinder Instrument Response 0.01 0.01 0.07 0.030 Calibration Post Zero Cylinder Bias -0.13 -0.13 0.13 -0.043 Calibration Post Zero Cylinder Drift 0.04 0 0.26 0.100 Calibration Post High Cylinder ID CC266906 CC266906 CC266906 Calibration Post High Cylinder Instrument Response 12.37 12.35 12.55 12.423 Calibration Post High Cylinder Bias 0.09 0 0.89 0.327 Calibration Post High Cylinder Drift 0.58 0.09 0.89 0.520 Cavg 5.69 5.64 5.5 5.610 Cavg Units %vd %vd %vd Cgas 5.6841 5.671 5.4732 5.609 Cgas Units %vd %vd %vd Fuel Type Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Wednesday, February 23, 2011 Page 17 of 17