### Name: John K. Ekas, IV

Title: Production Manager Company: Allegheny Energy Supply Company, L Sign Date: 9/17/2010 Name: Kenneth Loder Title: Project Manager Company:TRC Companies, Inc. Sign Date: 9/17/2010 Permitted Facility Representative / Date Testing Company Representative / Date



## Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3 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.

Saturday, January 15, 2011 Page 1 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Facility Information:
Mitchell Power Station 50 Electric Way

Courtney PA15067 Contact:John S. Stepan Phone:724-838-6155 Fax: 724-830-7869 Email:JSTEPAN@alleghenyenergy.com Testing Company: TRC Companies, Inc.
5540 Centerview Drive
Suite 100 Raleigh NC27606 Contact:Kenneth Loder Phone:919-256-6239 Fax: 919-838-9661 Email:kloder@trcsolutions.com

Air Permit Number: 3181 Permitted Source ID/Name: 3 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: Mitchell Boiler Unit 3 were originally designed to burn coal as their primary fuel. In 1994 the units were modified to burn No. 2 fuel oil. The unit has a gross rated capacity of 82 megawatts. Industry/SCC/NAIS221112

Sampling Location Information:

Test Parameter Information: AFS #:4212500037 FRS #:110010265961

SCC / Description10100501 External Combustion Boilers - Electric Generation - Distillate Oil - Grades 1 and 2 Oil

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 3 Stack Exit 298 3180 2940 4 0 3 0 0

Target Parameter Test Method Number of

Test RunsTest Run

DurationSample

Points Comments LocationCarbon Monoxide Method 10 3 120 0 Unit 1 Stack Exit 2,3,7,8-TCDD Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,7,8-PeCDD Method 23 3 480 0 Unit 1 Stack Exit



### Saturday, January 15, 2011 Page 2 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 1,2,3,4,7,8-HxCDD Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,6,7,8-HxCDD Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,7,8,9-HxCDD Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,4,6,7,8-HpCDD Method 23 3 480 0 Unit 1 Stack Exit OCDD Method 23 3 480 0 Unit 1 Stack Exit 2,3,7,8-TCDF Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,7,8-PeCDF Method 23 3 480 0 Unit 1 Stack Exit 2,3,4,7,8-PeCDF Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,4,7,8-HxCDF Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,6,7,8-HxCDF Method 23 3 480 0 Unit 1 Stack Exit 2,3,4,6,7,8-HxCDF Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,7,8,9-HxCDF Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,4,6,7,8-HpCDF Method 23 3 480 0 Unit 1 Stack Exit 1,2,3,4,7,8,9-HpCDF Method 23 3 480 0 Unit 1 Stack Exit OCDF Method 23 3 480 0 Unit 1 Stack Exit Other TCDD Method 23 3 480 0 Unit 1 Stack Exit Other PeCDD Method 23 3 480 0 Unit 1 Stack Exit Other HxCDD Method 23 3 480 0 Unit 1 Stack Exit Other HpCDD Method 23 3 480 0 Unit 1 Stack Exit Other TCDF Method 23 3 480 0 Unit 1 Stack Exit Other PeCDF Method 23 3 480 0 Unit 1 Stack Exit Other HxCDF Method 23 3 480 0 Unit 1 Stack Exit Other HpCDF Method 23 3 480 0 Unit 1 Stack Exit Total Dioxins Method 23 3 480 0 Unit 1 Stack Exit Total Furans Method 23 3 480 0 Unit 1 Stack Exit 3,3',4,4'-TCB (PCB77) Method 23 3 480 0 Unit 1 Stack Exit 3,4,4',5-TCB (PCB81) Method 23 3 480 0 Unit 1 Stack Exit 2,3,3',4,4'-PeCB (PCB105) Method 23 3 480 0 Unit 1 Stack Exit



### Saturday, January 15, 2011 Page 3 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 2,3,4,4',5-PeCB (PCB114) Method 23 3 480 0 Unit 1 Stack Exit 2,3',4,4',5-PeCB (PCB118) Method 23 3 480 0 Unit 1 Stack Exit 2',3,4,4',5-PeCB (PCB123) Method 23 3 480 0 Unit 1 Stack Exit 3,3',4,4',5-PeCB (PCB126) Method 23 3 480 0 Unit 1 Stack Exit 2,3,3',4,4',5/2,3,3',4,4',5'-

HxCB (PCBs156/157) Method 23 3 480 0 Unit 1 Stack Exit 2,3',4,4',5,5'-HxCB (PCB167)Method 23 3 480 0 Unit 1 Stack Exit 3,3',4,4',5,5'-HxCB (PCB169)Method 23 3 480 0 Unit 1 Stack Exit 2,3,3',4,4',5,5'-HpCB

(PCB189) Method 23 3 480 0 Unit 1 Stack Exit Total organic compounds

(TOC) as Propane Method 25A 3 120 0 NMHC emissions only. Methane emissions reported in excel template. Unit 1 Stack Exit

Hydrogen Fluoride Method 26A 3 60 0 Unit 1 Stack Exit Hydrogen Chloride Method 26A 3 60 0 Unit 1 Stack Exit Filterable PM2.5 OTM - 27/28 3 240 0 Unit 1 Stack Exit Total PM2.5 OTM - 27/28 3 240 0 Unit 1 Stack Exit Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 240 0 Unit 1 Stack Exit Organic Condensible

Particulate OTM - 27/28 3 240 0 Unit 1 Stack Exit Total Particulate OTM - 27/28 3 240 0 Unit 1 Stack Exit Filterable Particulate OTM - 27/28 3 240 0 Unit 1 Stack Exit Selenium Method 29 3 240 0 Unit 1 Stack Exit Filterable Particulate Method 29 3 240 0 Unit 1 Stack Exit Nickel Method 29 3 240 0 Unit 1 Stack Exit Cobalt Method 29 3 240 0 Unit 1 Stack Exit Chromium Method 29 3 240 0 Unit 1 Stack Exit Beryllium Method 29 3 240 0 Unit 1 Stack Exit Cadmium Method 29 3 240 0 Unit 1 Stack Exit Arsenic Method 29 3 240 0 Unit 1 Stack Exit Manganese Method 29 3 240 0 Unit 1 Stack Exit Antimony Method 29 3 240 0 Unit 1 Stack Exit



### Saturday, January 15, 2011 Page 4 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
Lead Method 29 3 240 0 Unit 1 Stack Exit Sulfur Dioxide Method 6C 3 60 0 Unit 1 Stack Exit Nitrogen oxides (NOx) Method 7E 3 60 0 Unit 1 Stack Exit Carbon Monoxide Method 10 3 120 0 Unit 3 Stack Exit 2,3,7,8-TCDD Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,7,8-PeCDD Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,4,7,8-HxCDD Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,6,7,8-HxCDD Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,7,8,9-HxCDD Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,4,6,7,8-HpCDD Method 23 3 480 0 Unit 3 Stack Exit OCDD Method 23 3 480 0 Unit 3 Stack Exit 2,3,7,8-TCDF Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,7,8-PeCDF Method 23 3 480 0 Unit 3 Stack Exit 2,3,4,7,8-PeCDF Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,4,7,8-HxCDF Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,6,7,8-HxCDF Method 23 3 480 0 Unit 3 Stack Exit 2,3,4,6,7,8-HxCDF Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,7,8,9-HxCDF Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,4,6,7,8-HpCDF Method 23 3 480 0 Unit 3 Stack Exit 1,2,3,4,7,8,9-HpCDF Method 23 3 480 0 Unit 3 Stack Exit OCDF Method 23 3 480 0 Unit 3 Stack Exit Other TCDD Method 23 3 480 0 Unit 3 Stack Exit Other PeCDD Method 23 3 480 0 Unit 3 Stack Exit Other HxCDD Method 23 3 480 0 Unit 3 Stack Exit Other HpCDD Method 23 3 480 0 Unit 3 Stack Exit Other TCDF Method 23 3 480 0 Unit 3 Stack Exit Other PeCDF Method 23 3 480 0 Unit 3 Stack Exit Other HxCDF Method 23 3 480 0 Unit 3 Stack Exit



### Saturday, January 15, 2011 Page 5 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Other HpCDF Method 23 3 480 0 Unit 3 Stack Exit Total Dioxins Method 23 3 480 0 Unit 3 Stack Exit Total Furans Method 23 3 480 0 Unit 3 Stack Exit 3,3',4,4'-TCB (PCB77) Method 23 3 480 0 Unit 3 Stack Exit 3,4,4',5-TCB (PCB81) Method 23 3 480 0 Unit 3 Stack Exit 2,3,3',4,4'-PeCB (PCB105) Method 23 3 480 0 Unit 3 Stack Exit 2,3,4,4',5-PeCB (PCB114) Method 23 3 480 0 Unit 3 Stack Exit 2,3',4,4',5-PeCB (PCB118) Method 23 3 480 0 Unit 3 Stack Exit 2',3,4,4',5-PeCB (PCB123) Method 23 3 480 0 Unit 3 Stack Exit 3,3',4,4',5-PeCB (PCB126) Method 23 3 480 0 Unit 3 Stack Exit 2,3,3',4,4',5/2,3,3',4,4',5'-

HxCB (PCBs156/157) Method 23 3 480 0 Unit 3 Stack Exit 2,3',4,4',5,5'-HxCB (PCB167)Method 23 3 480 0 Unit 3 Stack Exit 3,3',4,4',5,5'-HxCB (PCB169)Method 23 3 480 0 Unit 3 Stack Exit 2,3,3',4,4',5,5'-HpCB

(PCB189) Method 23 3 480 0 Unit 3 Stack Exit Total organic compounds

(TOC) as Propane Method 25A 3 120 0 NMHC emissions only. Methane emissions reported in excel template. Unit 3 Stack Exit

Hydrogen Chloride Method 26A 3 60 0 Unit 3 Stack Exit Hydrogen Fluoride Method 26A 3 60 0 Unit 3 Stack Exit Total Particulate OTM - 27/28 3 240 0 Unit 3 Stack Exit Filterable PM2.5 OTM - 27/28 3 240 0 Unit 3 Stack Exit Total PM2.5 OTM - 27/28 3 240 0 Unit 3 Stack Exit Filterable Particulate OTM - 27/28 3 240 0 Unit 3 Stack Exit Organic Condensible

Particulate OTM - 27/28 3 240 0 Unit 3 Stack Exit Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 240 0 Unit 3 Stack Exit Cadmium Method 29 3 240 0 Unit 3 Stack Exit Antimony Method 29 3 240 0 Unit 3 Stack Exit Manganese Method 29 3 240 0 Unit 3 Stack Exit Beryllium Method 29 3 240 0 Unit 3 Stack Exit



### Saturday, January 15, 2011 Page 6 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010

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.

Chromium Method 29 3 240 0 Unit 3 Stack Exit Lead Method 29 3 240 0 Unit 3 Stack Exit Selenium Method 29 3 240 0 Unit 3 Stack Exit Filterable Particulate Method 29 3 240 0 Unit 3 Stack Exit Nickel Method 29 3 240 0 Unit 3 Stack Exit Cobalt Method 29 3 240 0 Unit 3 Stack Exit Arsenic Method 29 3 240 0 Unit 3 Stack Exit Sulfur Dioxide Method 6C 3 60 0 Unit 3 Stack Exit Nitrogen oxides (NOx) Method 7E 3 60 0 Unit 3 Stack Exit



### Saturday, January 15, 2011 Page 7 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Sampling / Stack Data Results Summary



### LocationUnit 3 Stack Exit - Method 10 Average Run Number 1 2 3
Test Date 7/20/20107/21/2010 7/21/2010 Run Start Time 11:00:00 AM 6:09:00 AM10:42:00 AM

Run Finish Time 2:30:00 PM 9:05:00 AM 1:08:00 PM

Carbon Dioxide, % 6.56 6.88 6.95 6.797 Oxygen, % 12.18 11.82 11.64 11.880 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9190 9190 9190 9,190.000 Moisture, % 8.83 9.02 8.6 8.817 Fuel Type Oil Oil Oil
Fw 10320 10320 10320 10,320.000
Fc 1420 1420 1420 1,420.000



### LocationUnit 3 Stack Exit - Method 23 Average Run Number 1 2 3
Test Date 7/20/20107/21/2010 7/23/2010 Run Start Time 10:55:00 AM 12:30:00 PM1:58:00 AM

Run Finish Time 7:18:00 PM2:35:00 PM10:22:00 AM Net Run Time, minutes 480 480 480 Dry Gas Meter Volume Sampled, dscf 334.441 234.863 289.961 286.422 Moisture Content of Stack Gas, % 8.31 9.05 8.72 8.693 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 6.45 5.48 6.22 6.050 Oxygen, % 12.02 13.21 12.29 12.507 Average Stack Gas Temperature, °F 301.13 295.13 290.71 295.657 Dry Volumetric Flow Rate, dry scfm 175,720.6 120,401.9 133,783.8143,302.100 Actual Wet Volumetric Flue Gas Flow Rate, acfm 278,405.0 194,999.7 213,889.4229,098.033 Percent Isokinetic of Sampling Rate, % 101.8 104.4 102.0 102.733 F-Factor, dscfm/MMBtu @ %O2 9190 9190 9190 9,190.000
Fw 10320 10320 10320 10,320.000
Fc 1420 1420 1420 1,420.000



### Saturday, January 15, 2011 Page 8 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 25A Average Run Number 1 2 3
Test Date 7/20/2010 7/21/2010 7/21/2010 Run Start Time 11:00:00 AM 6:09:00 AM10:42:00 AM

Run Finish Time 2:30:00 PM 9:05:00 AM 1:08:00 PM

Carbon Dioxide, % 6.56 6.88 6.95 6.797 Oxygen, % 12.18 11.82 11.64 11.880 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9190 9190 9190 9,190.000 Moisture, % 8.83 9.02 8.6 8.817 Fuel Type Oil Oil Oil
Fw 10320 10320 10320 10,320.000
Fc 1420 1420 1420 1,420.000



### LocationUnit 3 Stack Exit - Method 26A Average Run Number 1 2 3
Test Date 7/21/20107/22/2010 7/22/2010 Run Start Time 8:13:00 PM 12:17:00 AM3:11:00 AM

Run Finish Time 10:22:00 PM 2:36:00 AM4:40:00 AM

Net Run Time, minutes 60 60 60 Dry Gas Meter Volume Sampled, dscf 28.065 33.140 32.860 31.355 Moisture Content of Stack Gas, % 12.69 11.44 11.33 11.820 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 6.78 7.1 7.06 6.980 Oxygen, % 11.91 11.57 11.55 11.677 Average Stack Gas Temperature, °F 289.75 293.63 288.79 290.723 Dry Volumetric Flow Rate, dry scfm 135,369.7 118,912.8 120,359.5124,880.667 Actual Wet Volumetric Flue Gas Flow Rate, acfm 226,676.3 197,324.6 198,196.4207,399.100 Percent Isokinetic of Sampling Rate, % 88.4 105.9 103.8 99.367 F-Factor, dscfm/MMBtu @ %O2 9190 9190 9190 9,190.000
Fw 10320 10320 10320 10,320.000
Fc 1420 1420 1420 1,420.000



### Saturday, January 15, 2011 Page 9 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 29 Average Run Number 1 2 3
Test Date 7/22/2010 7/22/2010 7/22/2010 Run Start Time 6:18:00 AM2:33:00 PM1:05:00 AM
Run Finish Time 11:28:00 AM6:45:00 PM7:55:00 PM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 146.472 137.458 168.718 150.883 Moisture Content of Stack Gas, % 8.97 8.15 8.61 8.577 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 7.46 4.61 6.22 6.097 Oxygen, % 10.79 14.45 12.29 12.510 Average Stack Gas Temperature, °F 293.96 291.88 295.67 293.837 Dry Volumetric Flow Rate, dry scfm 132,792.0 127,331.2 152,772.6137,631.933 Actual Wet Volumetric Flue Gas Flow Rate, acfm 214,470.6 202,555.6 245,566.0220,864.067 Percent Isokinetic of Sampling Rate, % 103.8 101.6 103.9 103.100 F-Factor, dscfm/MMBtu @ %O2 9190 9190 9190 9,190.000
Fw 10320 10320 10320 10,320.000
Fc 1420 1420 1420 1,420.000



### LocationUnit 3 Stack Exit - Method 6C Average Run Number 1 2 3
Test Date 7/21/2010 7/22/2010 7/22/2010 Run Start Time 10:57:00 AM1:08:00 PM5:48:00 PM
Run Finish Time 12:33:00 PM3:37:00 PM8:32:00 PM Carbon Dioxide, % 6.78 7.1 7.06 6.980 Oxygen, % 11.91 11.57 11.55 11.677 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9190 9190 9190 9,190.000 Moisture, % 12.71 11.47 11.36 11.847 Fuel Type Oil Oil Oil
Fw 10320 10320 10320 10,320.000
Fc 1420 1420 1420 1,420.000



### Saturday, January 15, 2011 Page 10 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 7E Average Run Number 1 2 3
Test Date 7/21/2010 7/22/2010 7/22/2010 Run Start Time 10:57:00 AM1:08:00 PM5:48:00 PM
Run Finish Time 12:33:00 PM3:37:00 PM8:32:00 PM Carbon Dioxide, % 6.78 7.1 7.06 6.980 Oxygen, % 11.91 11.57 11.55 11.677 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9190 9190 9190 9,190.000 Moisture, % 12.71 11.47 11.36 11.847 Fuel Type Oil Oil Oil
Fw 10320 10320 10320 10,320.000
Fc 1420 1420 1420 1,420.000



### LocationUnit 3 Stack Exit - OTM - 27/28 Average Run Number 1 2 3
Test Date 7/22/20107/22/2010 7/22/2010 Run Start Time 4:25:00 AM2:30:00 PM6:41:00 AM
Run Finish Time 11:27:00 AM9:00:00 PM11:22:00 PM Net Run Time, minutes 373 344.25 419.25 Dry Gas Meter Volume Sampled, dscf 140.036 127.154 151.051 139.414 Moisture Content of Stack Gas, % 8.79 8.54 8.95 8.760 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 7.52 7.46 4.61 6.530 Oxygen, % 10.71 10.79 14.45 11.983 Average Stack Gas Temperature, °F 289.54 291.96 287.75 289.750 Dry Volumetric Flow Rate, dry scfm 124,728.6 119,683.3 140,030.0128,147.300 Actual Wet Volumetric Flue Gas Flow Rate, acfm 199,940.1 191,221.8 223,479.6204,880.500 Percent Isokinetic of Sampling Rate, % 266.0 272.7 227.4 255.367 F-Factor, dscfm/MMBtu @ %O2 9190 9190 9190 9,190.000
Fw 10320 10320 10320 10,320.000
Fc 1420 1420 1420 1,420.000



### Saturday, January 15, 2011 Page 11 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Emissions Summary



### Location: Unit 3 Stack Exit - Method 10 Compound: Carbon Monoxide Average Run 1 2 3 lb/mmBtuO2 -3.67E-04 -4.48E-04 -2.94E-04 0.000 ppm -2.29E-01 -2.91E-01 -1.95E-01 -0.238 ppm@7%O2 -3.65E-01 -4.45E-01 -2.93E-01 -0.368



### Location: Unit 3 Stack Exit - Method 23 Compound: 1,2,3,4,6,7,8-HpCDD Average RunNumber 1 2 3 Mass_mg 0.00000000562 0.00000000696 0.0000000137 0.000 lb/mmBtuO2 8.01E-13 1.63E-12 2.32E-12 0.000 ng/dscm 5.94E-04 1.05E-03 1.67E-03 0.001 ng/dscm@7%O2 9.30E-04 1.90E-03 2.70E-03 0.002 

### Compound: 1,2,3,4,6,7,8-HpCDF Average RunNumber 1 2 3 Mass_mg 0.0000000038 0.00000000272 0.00000000728 0.000 lb/mmBtuO2 5.42E-13 6.38E-13 1.23E-12 0.000 ng/dscm 4.01E-04 4.09E-04 8.87E-04 0.001 ng/dscm@7%O2 6.28E-04 7.39E-04 1.43E-03 0.001 

### Compound: 1,2,3,4,7,8,9-HpCDF Average RunNumber 1 2 3 Mass_mg 0.00000000233 0.00000000218 0.00000000221 0.000 lb/mmBtuO2 3.32E-13 5.11E-13 3.75E-13 0.000 ng/dscm 2.46E-04 3.28E-04 2.69E-04 0.000 ng/dscm@7%O2 3.85E-04 5.93E-04 4.34E-04 0.000 

### Compound: 1,2,3,4,7,8-HxCDD Average RunNumber 1 2 3 Mass_mg 0.00000000139 0.00000000129 0.00000000144 0.000 lb/mmBtuO2 1.98E-13 3.02E-13 2.44E-13 0.000 ng/dscm 1.47E-04 1.94E-04 1.75E-04 0.000 ng/dscm@7%O2 2.30E-04 3.51E-04 2.83E-04 0.000 

### Compound: 1,2,3,4,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000000632 0.00000000371 0.0000000077 0.000 lb/mmBtuO2 9.01E-13 8.70E-13 1.31E-12 0.000 ng/dscm 6.67E-04 5.58E-04 9.38E-04 0.001 ng/dscm@7%O2 1.04E-03 1.01E-03 1.51E-03 0.001 

### Compound: 1,2,3,6,7,8-HxCDD Average


### Saturday, January 15, 2011 Page 12 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
RunNumber 1 2 3 Mass_mg 0.0000000015 0.00000000137 0.00000000326 0.000 lb/mmBtuO2 2.14E-13 3.21E-13 5.53E-13 0.000 ng/dscm 1.58E-04 2.06E-04 3.97E-04 0.000 ng/dscm@7%O2 2.47E-04 3.72E-04 6.41E-04 0.000 

### Compound: 1,2,3,6,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000000205 0.00000000156 0.00000000296 0.000 lb/mmBtuO2 2.92E-13 3.66E-13 5.02E-13 0.000 ng/dscm 2.16E-04 2.35E-04 3.61E-04 0.000 ng/dscm@7%O2 3.38E-04 4.25E-04 5.83E-04 0.000 

### Compound: 1,2,3,7,8,9-HxCDD Average RunNumber 1 2 3 Mass_mg 0.00000000218 0.00000000241 0.00000000271 0.000 lb/mmBtuO2 3.11E-13 5.65E-13 4.60E-13 0.000 ng/dscm 2.30E-04 3.62E-04 3.30E-04 0.000 ng/dscm@7%O2 3.60E-04 6.54E-04 5.33E-04 0.001 

### Compound: 1,2,3,7,8,9-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000000104 0.00000000105 0.00000000122 0.000 lb/mmBtuO2 1.48E-13 2.46E-13 2.07E-13 0.000 ng/dscm 1.10E-04 1.58E-04 1.49E-04 0.000 ng/dscm@7%O2 1.72E-04 2.86E-04 2.41E-04 0.000 

### Compound: 1,2,3,7,8-PeCDD Average RunNumber 1 2 3 Mass_mg 0.00000000143 0.00000000151 0.00000000178 0.000 lb/mmBtuO2 2.04E-13 3.54E-13 3.02E-13 0.000 ng/dscm 1.51E-04 2.27E-04 2.17E-04 0.000 ng/dscm@7%O2 2.36E-04 4.10E-04 3.50E-04 0.000 

### Compound: 1,2,3,7,8-PeCDF Average RunNumber 1 2 3 Mass_mg 0.00000000444 0.0000000035 0.00000000453 0.000 lb/mmBtuO2 6.33E-13 8.21E-13 7.68E-13 0.000 ng/dscm 4.69E-04 5.26E-04 5.52E-04 0.001 ng/dscm@7%O2 7.34E-04 9.51E-04 8.91E-04 0.001 

### Compound: 2,3,3',4,4',5,5'-HpCB (PCB189) Average RunNumber 1 2 3 Mass_mg 0.0000000123 0.0000000165 0.0000000202 0.000 lb/mmBtuO2 1.75E-12 3.87E-12 3.43E-12 0.000 ng/dscm 1.30E-03 2.48E-03 2.46E-03 0.002 ng/dscm@7%O2 2.03E-03 4.48E-03 3.97E-03 0.003



### Saturday, January 15, 2011 Page 13 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Compound: 2,3,3',4,4',5/2,3,3',4,4',5'-HxCB (PC Average RunNumber 1 2 3 Mass_mg 0.0000003166 0.0000004032 0.0000003221 0.000 lb/mmBtuO2 4.51E-11 9.45E-11 5.46E-11 0.000 ng/dscm 3.34E-02 6.06E-02 3.92E-02 0.044 ng/dscm@7%O2 5.23E-02 1.10E-01 6.33E-02 0.075 

### Compound: 2,3,3',4,4'-PeCB (PCB105) Average RunNumber 1 2 3 Mass_mg 0.00000247 0.00000205 0.00000288 0.000 lb/mmBtuO2 3.52E-10 4.81E-10 4.88E-10 0.000 ng/dscm 2.61E-01 3.08E-01 3.51E-01 0.307 ng/dscm@7%O2 4.09E-01 5.57E-01 5.67E-01 0.511 

### Compound: 2,3',4,4',5,5'-HxCB (PCB167) Average RunNumber 1 2 3 Mass_mg 0.000000151 0.000000191 0.000000181 0.000 lb/mmBtuO2 2.15E-11 4.48E-11 3.07E-11 0.000 ng/dscm 1.59E-02 2.87E-02 2.20E-02 0.022 ng/dscm@7%O2 2.49E-02 5.19E-02 3.55E-02 0.037 

### Compound: 2,3,4,4',5-PeCB (PCB114) Average RunNumber 1 2 3 Mass_mg 0.000000238 0.000000184 0.000000229 0.000 lb/mmBtuO2 3.39E-11 4.31E-11 3.88E-11 0.000 ng/dscm 2.51E-02 2.77E-02 2.79E-02 0.027 ng/dscm@7%O2 3.93E-02 5.01E-02 4.50E-02 0.045 

### Compound: 2,3',4,4',5-PeCB (PCB118) Average RunNumber 1 2 3 Mass_mg 0.00000797 0.0000079 0.00000839 0.000 lb/mmBtuO2 1.14E-09 1.85E-09 1.42E-09 0.000 ng/dscm 8.42E-01 1.19E+00 1.02E+00 1.017 ng/dscm@7%O2 1.32E+00 2.15E+00 1.65E+00 1.707 

### Compound: 2',3,4,4',5-PeCB (PCB123) Average RunNumber 1 2 3 Mass_mg 0.000000242 0.000000265 0.000000259 0.000 lb/mmBtuO2 3.45E-11 6.21E-11 4.39E-11 0.000 ng/dscm 2.56E-02 3.99E-02 3.15E-02 0.032 ng/dscm@7%O2 4.01E-02 7.21E-02 5.09E-02 0.054 

### Compound: 2,3,4,6,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000000185 0.00000000133 0.00000000311 0.000 lb/mmBtuO2 2.64E-13 3.12E-13 5.27E-13 0.000



### Saturday, January 15, 2011 Page 14 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 ng/dscm 1.95E-04 2.00E-04 3.79E-04 0.000 ng/dscm@7%O2 3.05E-04 3.62E-04 6.12E-04 0.000 

### Compound: 2,3,4,7,8-PeCDF Average RunNumber 1 2 3 Mass_mg 0.000000007 0.00000000436 0.0000000076 0.000 lb/mmBtuO2 9.98E-13 1.02E-12 1.29E-12 0.000 ng/dscm 7.39E-04 6.56E-04 9.26E-04 0.001 ng/dscm@7%O2 1.16E-03 1.19E-03 1.49E-03 0.001 

### Compound: 2,3,7,8-TCDD Average RunNumber 1 2 3 Mass_mg 0.00000000174 0.0000000018 0.00000000131 0.000 lb/mmBtuO2 2.48E-13 4.22E-13 2.22E-13 0.000 ng/dscm 1.84E-04 2.71E-04 1.60E-04 0.000 ng/dscm@7%O2 2.88E-04 4.90E-04 2.58E-04 0.000 

### Compound: 2,3,7,8-TCDF Average RunNumber 1 2 3 Mass_mg 0.0000000139 0.0000000131 0.0000000118 0.000 lb/mmBtuO2 1.98E-12 3.07E-12 2.00E-12 0.000 ng/dscm 1.47E-03 1.97E-03 1.44E-03 0.002 ng/dscm@7%O2 2.30E-03 3.56E-03 2.32E-03 0.003 

### Compound: 3,3',4,4',5,5'-HxCB (PCB169) Average RunNumber 1 2 3 Mass_mg 0.00000000631 0.00000000899 0.0000000129 0.000 lb/mmBtuO2 9.00E-13 2.11E-12 2.19E-12 0.000 ng/dscm 6.66E-04 1.35E-03 1.57E-03 0.001 ng/dscm@7%O2 1.04E-03 2.44E-03 2.53E-03 0.002 

### Compound: 3,3',4,4',5-PeCB (PCB126) Average RunNumber 1 2 3 Mass_mg 0.0000000383 0.0000000404 0.000000106 0.000 lb/mmBtuO2 5.46E-12 9.47E-12 1.80E-11 0.000 ng/dscm 4.04E-03 6.08E-03 1.29E-02 0.008 ng/dscm@7%O2 6.32E-03 1.10E-02 2.08E-02 0.013 

### Compound: 3,3',4,4'-TCB (PCB77) Average RunNumber 1 2 3 Mass_mg 0.00000198 0.00000121 0.00000268 0.000 lb/mmBtuO2 2.82E-10 2.84E-10 4.55E-10 0.000 ng/dscm 2.09E-01 1.82E-01 3.26E-01 0.239 ng/dscm@7%O2 3.27E-01 3.29E-01 5.26E-01 0.394 

### Compound: 3,4,4',5-TCB (PCB81) Average RunNumber 1 2 3



### Saturday, January 15, 2011 Page 15 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Mass_mg 0.00000014 0.0000000726 0.000000157 0.000 lb/mmBtuO2 2.00E-11 1.70E-11 2.66E-11 0.000 ng/dscm 1.48E-02 1.09E-02 1.91E-02 0.015 ng/dscm@7%O2 2.32E-02 1.97E-02 3.08E-02 0.025 

### Compound: OCDD Average RunNumber 1 2 3 Mass_mg 0.0000000224 0.0000000222 0.0000000317 0.000 lb/mmBtuO2 3.19E-12 5.20E-12 5.38E-12 0.000 ng/dscm 2.37E-03 3.34E-03 3.86E-03 0.003 ng/dscm@7%O2 3.71E-03 6.04E-03 6.23E-03 0.005 

### Compound: OCDF Average RunNumber 1 2 3 Mass_mg 0.00000000375 0.00000000413 0.00000000428 0.000 lb/mmBtuO2 5.35E-13 9.68E-13 7.26E-13 0.000 ng/dscm 3.96E-04 6.21E-04 5.21E-04 0.001 ng/dscm@7%O2 6.20E-04 1.12E-03 8.41E-04 0.001 

### Compound: Other HpCDD Average RunNumber 1 2 3 Mass_mg 0.00000000853 0 0.0000000253 0.000 lb/mmBtuO2 1.22E-12 0.00E+00 4.29E-12 0.000 ng/dscm 9.01E-04 0.00E+00 3.08E-03 0.001 ng/dscm@7%O2 1.41E-03 0.00E+00 4.97E-03 0.002 

### Compound: Other HpCDF Average RunNumber 1 2 3 Mass_mg 0 0 0.00000000249 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 4.22E-13 0.000 ng/dscm 0.00E+00 0.00E+00 3.03E-04 0.000 ng/dscm@7%O2 0.00E+00 0.00E+00 4.89E-04 0.000 

### Compound: Other HxCDD Average RunNumber 1 2 3 Mass_mg 0.0000000194 0.0000000151 0.0000000688 0.000 lb/mmBtuO2 2.77E-12 3.54E-12 1.17E-11 0.000 ng/dscm 2.05E-03 2.27E-03 8.38E-03 0.004 ng/dscm@7%O2 3.21E-03 4.10E-03 1.35E-02 0.007 

### Compound: Other HxCDF Average RunNumber 1 2 3 Mass_mg 0.0000000106 0.00000000477 0.0000000175 0.000 lb/mmBtuO2 1.51E-12 1.12E-12 2.97E-12 0.000 ng/dscm 1.12E-03 7.17E-04 2.13E-03 0.001 ng/dscm@7%O2 1.75E-03 1.30E-03 3.44E-03 0.002



### Saturday, January 15, 2011 Page 16 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Compound: Other PeCDD Average RunNumber 1 2 3 Mass_mg 0.0000000268 0.0000000134 0.000000107 0.000 lb/mmBtuO2 3.82E-12 3.14E-12 1.81E-11 0.000 ng/dscm 2.83E-03 2.02E-03 1.30E-02 0.006 ng/dscm@7%O2 4.43E-03 3.65E-03 2.10E-02 0.010 

### Compound: Other PeCDF Average RunNumber 1 2 3 Mass_mg 0.0000000523 0.0000000307 0.0000000493 0.000 lb/mmBtuO2 7.46E-12 7.20E-12 8.36E-12 0.000 ng/dscm 5.52E-03 4.62E-03 6.01E-03 0.005 ng/dscm@7%O2 8.64E-03 8.35E-03 9.70E-03 0.009 

### Compound: Other TCDD Average RunNumber 1 2 3 Mass_mg 0.000000074 0.0000000406 0.000000128 0.000 lb/mmBtuO2 1.06E-11 9.52E-12 2.17E-11 0.000 ng/dscm 7.82E-03 6.11E-03 1.56E-02 0.010 ng/dscm@7%O2 1.22E-02 1.10E-02 2.52E-02 0.016 

### Compound: Other TCDF Average RunNumber 1 2 3 Mass_mg 0.000000128 0.00000011 0.0000000959 0.000 lb/mmBtuO2 1.83E-11 2.58E-11 1.63E-11 0.000 ng/dscm 1.35E-02 1.65E-02 1.17E-02 0.014 ng/dscm@7%O2 2.11E-02 2.98E-02 1.89E-02 0.023 

### Compound: Total Dioxins Average RunNumber 1 2 3 Mass_mg 0.00000016499 0.00000010664 0.000000385 0.000 lb/mmBtuO2 2.35E-11 2.50E-11 6.53E-11 0.000 ng/dscm 1.74E-02 1.60E-02 4.69E-02 0.027 ng/dscm@7%O2 2.72E-02 2.89E-02 7.57E-02 0.044 

### Compound: Total Furans Average RunNumber 1 2 3 Mass_mg 0.00000023738 0.00000018311 0.00000021788 0.000 lb/mmBtuO2 3.38E-11 4.29E-11 3.70E-11 0.000 ng/dscm 2.51E-02 2.75E-02 2.65E-02 0.026 ng/dscm@7%O2 3.93E-02 4.97E-02 4.28E-02 0.044



### Location: Unit 3 Stack Exit - Method 25A 

### Compound: Total organic compounds (TOC) as Average Run 1 2 3 lb/mmBtuO2 1.43E-03 -1.43E-04 -4.14E-04 0.000


### Saturday, January 15, 2011 Page 17 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010

ppm 5.68E-01 -5.92E-02 -1.74E-01 0.112 ppm@7%O2 9.05E-01 -9.06E-02 -2.61E-01 0.184



### Location: Unit 3 Stack Exit - Method 26A Compound: Hydrogen Chloride Average RunNumber 1 2 3 Mass_mg 0.42 0.359 0.144 0.308 lb/mmBtuO2 7.05E-04 4.92E-04 1.98E-04 0.000 

### Compound: Hydrogen Fluoride Average RunNumber 1 2 3 Mass_mg 0.14 0.142 0.155 0.146 lb/mmBtuO2 2.35E-04 1.94E-04 2.14E-04 0.000



### Location: Unit 3 Stack Exit - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.0002 0.0002 0.0002 0.000 lb/mmBtuO2 5.72E-08 9.55E-08 5.83E-08 0.000 

### Compound:Arsenic Average RunNumber 1 2 3 Mass_mg 0.0006 0.0009 0.0016 0.001 lb/mmBtuO2 1.72E-07 4.30E-07 4.66E-07 0.000 

### Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.00006 0.00006 0.00006 0.000 lb/mmBtuO2 1.72E-08 2.87E-08 1.75E-08 0.000 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.00006 0.00013 0.00013 0.000 lb/mmBtuO2 1.72E-08 6.21E-08 3.79E-08 0.000 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.0035 0.0035 0.012 0.006 lb/mmBtuO2 1.00E-06 1.67E-06 3.50E-06 0.000 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.0006 0.0006 0.0006 0.001 lb/mmBtuO2 1.72E-07 2.87E-07 1.75E-07 0.000



### Saturday, January 15, 2011 Page 18 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 6.9 6.3 5.2 6.133 lb/mmBtuO2 1.97E-03 3.01E-03 1.52E-03 0.002 

### Compound:Lead Average RunNumber 1 2 3 Mass_mg 0.0012 0.0012 0.0025 0.002 lb/mmBtuO2 3.43E-07 5.73E-07 7.29E-07 0.000 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.0041 0.0053 0.0082 0.006 lb/mmBtuO2 1.17E-06 2.53E-06 2.39E-06 0.000 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.0058 0.0057 0.0118 0.008 lb/mmBtuO2 1.66E-06 2.72E-06 3.44E-06 0.000 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.002 0.002 0.002 0.002 lb/mmBtuO2 5.72E-07 9.55E-07 5.83E-07 0.000



### Location: Unit 3 Stack Exit - Method 6C 

### Compound: Sulfur Dioxide Average Run 1 2 3 lb/mmBtuO2 1.13E-01 9.54E-02 9.57E-02 0.101 ppm 3.18E+01 2.79E+01 2.80E+01 29.233 ppm@7%O2 4.92E+01 4.16E+01 4.16E+01 44.133



### Location: Unit 3 Stack Exit - Method 7E 

### Compound:Nitrogen oxides (NOx) Average Run 1 2 3 lb/mmBtuO2 1.29E-01 1.35E-01 1.36E-01 0.133 ppm 5.08E+01 5.51E+01 5.56E+01 53.833 ppm@7%O2 7.85E+01 8.21E+01 8.27E+01 81.100



### Location: Unit 3 Stack Exit - OTM - 27/28 

### Compound:Filterable Particulate Average RunNumber 1 2 3 Mass_mg 15 16.7 11.1 14.267 lb/mmBtuO2 4.45E-03 5.50E-03 4.82E-03 0.005


### Saturday, January 15, 2011 Page 19 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010

Process Run Data Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 14.5 14.9 10 13.133 lb/mmBtuO2 4.30E-03 4.91E-03 4.35E-03 0.005 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 4.38 6.58 1.98 4.313 lb/mmBtuO2 1.30E-03 2.17E-03 8.61E-04 0.001 

### Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 8.62 16.42 17.02 14.020 lb/mmBtuO2 2.56E-03 5.41E-03 7.40E-03 0.005 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 28 39.7 30.1 32.600 lb/mmBtuO2 8.31E-03 1.31E-02 1.31E-02 0.012 

### Compound: Total PM2.5 Average RunNumber 1 2 3 Mass_mg 27.5 37.9 29 31.467 lb/mmBtuO2 8.16E-03 1.25E-02 1.26E-02 0.011



### Saturday, January 15, 2011 Page 20 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Process Run Data

APCD Run Data

Process Lab Run Data 

### Run Name Value UOM Comments Target Value 1 Unit 1 and 3 Combined Gross Generation 30 MW Collected during testing on 7/20/10 0



### 2 Unit 1 and 3 Combined Gross Generation 30 MW Collected during testing on 7/21/10 0

3 Unit 1 and 3 Combined Gross Generation 30 MW Collected during testing on 7/22/10 0



### 4 Unit 1 and 3 Combined Gross Generation 31 MW Collected during testing on 7/23/10 0

1 Unit 3 Fuel Oil Firing Rate 29735 gallons Collected during testing on 7/20/10 0

2 Unit 3 Fuel Oil Firing Rate 39493 gallons Collected during testing on 7/21/10 0



### 3 Unit 3 Fuel Oil Firing Rate 38048 gallons Collected during testing on 7/22/10 0

4 Unit 3 Fuel Oil Firing Rate 12734 gallons Collected during testing on 7/23/10 0



### 2 Unit 1 Fuel Oil Firing Rate 29564 gallons Collected during testing on 7/21/10 0

3 Unit 1 Fuel Oil Firing Rate 29179 gallons Collected during testing on 7/22/10 0



### 4 Unit 1 Fuel Oil Firing Rate 10959 gallons Collected during testing on 7/23/10 0

Saturday, January 15, 2011 Page 21 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010 Sampling / Stack Data Results Detail



### LocationUnit 3 Stack Exit - Method 10 Average Run Number 1 2 3 Test Date 7/20/2010 7/21/2010 7/21/2010 Run Start Time 11:00:00 AM6:09:00 AM10:42:00 AM Run Finish Time 2:30:00 PM9:05:00 AM 1:08:00 PM Carbon Dioxide, % 6.56 6.88 6.95 6.797 Oxygen, % 12.18 11.82 11.64 11.880 Fuel Factor 1.33 0 0 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9190 9190 91909,190.000 Moisture, % 8.83 9.02 8.6 8.817 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 0 0 0 0.000 Operating Units No. Readings/Avg. 0 0 0 0.000 Calibration Set 1 1 1 1.000 Calibration Pre Zero Cylinder ID XC028023BXC028023BXC028023B Calibration Pre Zero Cylinder Instrument Response 1.96 1.95 1.93 1.947 Calibration Pre Zero Cylinder Bias 1.52 1.51 1.49 1.507 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC100182 CC100182 CC100182 Calibration Pre High Cylinder Instrument Response 51.45 52.44 52.42 52.103 Calibration Pre High Cylinder Bias 0.51 1.5 1.48 1.163 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID XC028023BXC028023BXC028023B Calibration Post Zero Cylinder Instrument Response 1.95 1.93 1.94 1.940 Calibration Post Zero Cylinder Bias 1.51 1.49 1.5 1.500 Calibration Post Zero Cylinder Drift 0.01 0.02 0.01 0.013 Calibration Post High Cylinder ID CC100182 CC100182 CC100182 Calibration Post High Cylinder Instrument Response 52.01 52.42 52.86 52.430 Calibration Post High Cylinder Bias 1.07 1.48 1.92 1.490 Calibration Post High Cylinder Drift 0.56 0.02 0.44 0.340 Cavg 1.73 1.65 1.74 1.707 Cavg Units ppmvd ppmvd ppmvd Cgas -0.2292 -0.2912 -0.195 -0.238 Cgas Units ppmvd ppmvd ppmvd Fuel Type Oil Oil Oil Fw 10320 10320 1032010,320.000 Fc 1420 1420 14201,420.000 Cgasw 0 0 0 0.000 Cgasw Units



### Saturday, January 15, 2011 Page 22 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 23 Average Run Number 1 2 3 Test Date 7/20/2010 7/21/2010 7/23/2010 Run Start Time 10:55:00 AM12:30:00 PM1:58:00 AM Run Finish Time 7:18:00 PM2:35:00 PM10:22:00 AM Net Traversing Points 24 24 24 Net Run Time, minutes 480 480 480 Nozzle Diameter, inches 0.588 0.588 0.627 0.601 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0035 1.0035 0.999 1.002 Barometric Pressure, inches of Mercury 29.85 29.2 29.3 29.450 Average Orifice Meter Differential, inches H2O 1.80 0.82 1.37 1.330 Dry Gas Meter Volume Sampled, cubic feet 353.078 252.542 310.415 305.345 Average Dry Gas Meter Temperature, °F 100.54 97.17 94.88 97.530 Dry Gas Meter Volume Sampled, dscf 334.441 234.863 289.961 286.422 Total Moisture Liquid collected, g 644 496.3 588.5 576.267 Volume of Water Vapor, standard cubic feet 30.31 23.36 27.70 27.123 Moisture Content of Stack Gas, % 8.31 9.05 8.72 8.693 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.9169 0.9095 0.9128 0.913 Carbon Dioxide, % 6.45 5.48 6.22 6.050 Oxygen, % 12.02 13.21 12.29 12.507 Carbon Monoxide & Nitrogen, % 81.53 81.31 81.49 81.443 Fuel Factor 1.38 1.40 1.38 Dry Molecular Weight, lb/lb-Mole 29.51 29.41 29.49 29.470 Wet Molecular weight, lb/lb-Mole 28.55 28.38 28.49 28.473 Flue Gas Static Pressure, inches of H2O -2.12 -2.04 -2 -2.053 Absolute Flue Gas Pressure, inches of Mercury 29.69 29.05 29.15 29.297 Average Stack Gas Temperature, °F 301.13 295.13 290.71 295.657 Average Velocity Head, inches of H2O 1.9816939085 8056E-029.530111080

07866E-031.162172379

08746E-02 0.014

Average Stack Gas Velocity, feet/second 9.58 6.71 7.36 7.883 Stack Cross-Sectional Area, square feet 484.351 484.351 484.351 484.351 Dry Volumetric Flow Rate, dry scfm 175,720.6 120,401.9 133,783.8143,302.100 Actual Wet Volumetric Flue Gas Flow Rate, acfm 278,405.0 194,999.7 213,889.4229,098.033 Percent Isokinetic of Sampling Rate, % 101.8 104.4 102.0 102.733 Percent Excess Air, % 126.5 160.0 133.2 139.900 F-Factor, dscfm/MMBtu @ %O2 9190 9190 91909,190.000 Round Duct Diameter, inches 298 298 298 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10320 10320 1032010,320.000 Fc 1420 1420 14201,420.000



### Saturday, January 15, 2011 Page 23 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 25A Average Run Number 1 2 3 Test Date 7/20/2010 7/21/2010 7/21/2010 Run Start Time 11:00:00 AM6:09:00 AM10:42:00 AM Run Finish Time 2:30:00 PM9:05:00 AM 1:08:00 PM Carbon Dioxide, % 6.56 6.88 6.95 6.797 Oxygen, % 12.18 11.82 11.64 11.880 Fuel Factor 1.33 1.32 1.33 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9190 9190 91909,190.000 Moisture, % 8.83 9.02 8.6 8.817 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 0 0 0 0.000 Operating Units No. Readings/Avg. 0 0 0 0.000 Calibration Set 2 2 2 2.000 Calibration Pre Zero Cylinder ID Air Air Air Calibration Pre Zero Cylinder Instrument Response -0.06 0.13 0.31 0.127 Calibration Pre Zero Cylinder Bias -0.82 -0.06 0.66 -0.073 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC171780 CC171780 CC171780 Calibration Pre High Cylinder Instrument Response 6.74 6.83 6.73 6.767 Calibration Pre High Cylinder Bias -0.82 -0.46 -0.86 -0.713 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Air Air Air Calibration Post Zero Cylinder Instrument Response 0.13 0.31 0.53 0.323 Calibration Post Zero Cylinder Bias -0.06 0.66 1.54 0.713 Calibration Post Zero Cylinder Drift 0.76 0.72 0.88 0.787 Calibration Post High Cylinder ID CC171780 CC171780 CC171780 Calibration Post High Cylinder Instrument Response 6.83 6.73 6.53 6.697 Calibration Post High Cylinder Bias -0.46 -0.86 -1.66 -0.993 Calibration Post High Cylinder Drift 0.36 0.84 0.8 0.667 Cavg 0.53 0.17 0.28 0.327 Cavg Units ppmvw ppmvw ppmvw Cgas 0.5684 -0.0592 -0.1743 0.112 Cgas Units ppmvd ppmvd ppmvd Fuel Type Oil Oil Oil Fw 10320 10320 1032010,320.000 Fc 1420 1420 14201,420.000 Cgasw 0.5181733333 33333 - 5.385670731 70731E-02 -

0.159297906 602254 0.102

Cgasw Units ppmvw ppmvw ppmvw



### Saturday, January 15, 2011 Page 24 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 26A Average Run Number 1 2 3 Test Date 7/21/2010 7/22/2010 7/22/2010 Run Start Time 8:13:00 PM12:17:00 AM3:11:00 AM Run Finish Time 10:22:00 PM2:36:00 AM4:40:00 AM Net Traversing Points 24 24 24 Net Run Time, minutes 60 60 60 Nozzle Diameter, inches 0.589 0.624 0.624 0.612 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 29.21 29.21 29.21 29.210 Average Orifice Meter Differential, inches H2O 0.84 1.15 1.12 1.037 Dry Gas Meter Volume Sampled, cubic feet 30.474 35.170 34.998 33.547 Average Dry Gas Meter Temperature, °F 100.34 88.08 90.00 92.807 Dry Gas Meter Volume Sampled, dscf 28.065 33.140 32.860 31.355 Total Moisture Liquid collected, g 86.6 91 89.3 88.967 Volume of Water Vapor, standard cubic feet 4.08 4.28 4.20 4.187 Moisture Content of Stack Gas, % 12.69 11.44 11.33 11.820 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.8731 0.8856 0.8867 0.882 Carbon Dioxide, % 6.78 7.1 7.06 6.980 Oxygen, % 11.91 11.57 11.55 11.677 Carbon Monoxide & Nitrogen, % 81.31 81.33 81.39 81.343 Fuel Factor 1.33 1.31 1.32 Dry Molecular Weight, lb/lb-Mole 29.56 29.60 29.59 29.583 Wet Molecular weight, lb/lb-Mole 28.09 28.27 28.28 28.213 Flue Gas Static Pressure, inches of H2O -2.1 -2 -2 -2.033 Absolute Flue Gas Pressure, inches of Mercury 29.06 29.06 29.06 29.060 Average Stack Gas Temperature, °F 289.75 293.63 288.79 290.723 Average Velocity Head, inches of H2O 1.2860472085 5749E-029.735999179

26907E-039.907012519

19873E-03 0.011

Average Stack Gas Velocity, feet/second 7.80 6.79 6.82 7.137 Stack Cross-Sectional Area, square feet 484.351 484.351 484.351 484.351 Dry Volumetric Flow Rate, dry scfm 135,369.7 118,912.8 120,359.5124,880.667 Actual Wet Volumetric Flue Gas Flow Rate, acfm 226,676.3 197,324.6 198,196.4207,399.100 Percent Isokinetic of Sampling Rate, % 88.4 105.9 103.8 99.367 Percent Excess Air, % 124.6 116.9 116.2 119.233 F-Factor, dscfm/MMBtu @ %O2 9190 9190 91909,190.000 Round Duct Diameter, inches 298 298 298 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10320 10320 1032010,320.000 Fc 1420 1420 14201,420.000



### Saturday, January 15, 2011 Page 25 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 29 Average Run Number 1 2 3 Test Date 7/22/2010 7/22/2010 7/22/2010 Run Start Time 6:18:00 AM2:33:00 PM1:05:00 AM Run Finish Time 11:28:00 AM6:45:00 PM7:55:00 PM Net Traversing Points 24 24 24 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.627 0.627 0.627 0.627 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 29.21 29.3 29.3 29.270 Average Orifice Meter Differential, inches H2O 1.36 1.24 1.77 1.457 Dry Gas Meter Volume Sampled, cubic feet 157.312 149.202 180.615 162.376 Average Dry Gas Meter Temperature, °F 94.96 102.42 95.42 97.600 Dry Gas Meter Volume Sampled, dscf 146.472 137.458 168.718 150.883 Total Moisture Liquid collected, g 306.8 258.9 337.7 301.133 Volume of Water Vapor, standard cubic feet 14.44 12.19 15.90 14.177 Moisture Content of Stack Gas, % 8.97 8.15 8.61 8.577 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.9103 0.9185 0.9139 0.914 Carbon Dioxide, % 7.46 4.61 6.22 6.097 Oxygen, % 10.79 14.45 12.29 12.510 Carbon Monoxide & Nitrogen, % 81.75 80.94 81.49 81.393 Fuel Factor 1.36 1.40 1.38 Dry Molecular Weight, lb/lb-Mole 29.63 29.32 29.49 29.480 Wet Molecular weight, lb/lb-Mole 28.59 28.40 28.50 28.497 Flue Gas Static Pressure, inches of H2O -2 -1.9 -2 -1.967 Absolute Flue Gas Pressure, inches of Mercury 29.06 29.16 29.15 29.123 Average Stack Gas Temperature, °F 293.96 291.88 295.67 293.837 Average Velocity Head, inches of H2O 1.1627643067 7027E-021.036805446

17808E-021.520851147

13565E-02 0.012

Average Stack Gas Velocity, feet/second 7.38 6.97 8.45 7.600 Stack Cross-Sectional Area, square feet 484.351 484.351 484.351 484.351 Dry Volumetric Flow Rate, dry scfm 132,792.0 127,331.2 152,772.6137,631.933 Actual Wet Volumetric Flue Gas Flow Rate, acfm 214,470.6 202,555.6 245,566.0220,864.067 Percent Isokinetic of Sampling Rate, % 103.8 101.6 103.9 103.100 Percent Excess Air, % 100.0 208.9 133.2 147.367 F-Factor, dscfm/MMBtu @ %O2 9190 9190 91909,190.000 Round Duct Diameter, inches 298 298 298 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10320 10320 1032010,320.000 Fc 1420 1420 14201,420.000



### Saturday, January 15, 2011 Page 26 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 6C Average Run Number 1 2 3 Test Date 7/21/2010 7/22/2010 7/22/2010 Run Start Time 10:57:00 AM1:08:00 PM5:48:00 PM Run Finish Time 12:33:00 PM3:37:00 PM8:32:00 PM Carbon Dioxide, % 6.78 7.1 7.06 6.980 Oxygen, % 11.91 11.57 11.55 11.677 Fuel Factor 1.33 1.31 1.32 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9190 9190 91909,190.000 Moisture, % 12.71 11.47 11.36 11.847 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 0 0 0 0.000 Operating Units No. Readings/Avg. 0 0 0 0.000 Calibration Set 3 3 3 3.000 Calibration Pre Zero Cylinder ID XC028023BXC028023BXC028023B Calibration Pre Zero Cylinder Instrument Response -0.56 0.7 2.45 0.863 Calibration Pre Zero Cylinder Bias -0.04 0.21 0.56 0.243 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC267545 CC267545 CC267545 Calibration Pre High Cylinder Instrument Response 224.95 225.47 224 224.807 Calibration Pre High Cylinder Bias -2.63 -2.53 -2.82 -2.660 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID XC028023BXC028023BXC028023B Calibration Post Zero Cylinder Instrument Response 0.7 2.45 2.57 1.907 Calibration Post Zero Cylinder Bias 0.21 0.56 0.58 0.450 Calibration Post Zero Cylinder Drift 0.25 0.351.999999999 99999E-02 0.207

Calibration Post High Cylinder ID CC267545 CC267545 CC267545 Calibration Post High Cylinder Instrument Response 225.47 224 223.54 224.337 Calibration Post High Cylinder Bias -2.53 -2.82 -2.91 -2.753 Calibration Post High Cylinder Drift 0.1 0.299.000000000 00003E-02 0.160

Cavg 30.25 27.77 28.62 28.880 Cavg Units ppmvd ppmvd ppmvd Cgas 31.8235 27.8665 28.0146 29.235 Cgas Units ppmvd ppmvd ppmvd Fuel Type Oil Oil Oil Fw 10320 10320 1032010,320.000 Fc 1420 1420 14201,420.000 Cgasw 0 0 0 0.000 Cgasw Units



### Saturday, January 15, 2011 Page 27 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - Method 7E Average Run Number 1 2 3 Test Date 7/21/2010 7/22/2010 7/22/2010 Run Start Time 10:57:00 AM1:08:00 PM5:48:00 PM Run Finish Time 12:33:00 PM3:37:00 PM8:32:00 PM Carbon Dioxide, % 6.78 7.1 7.06 6.980 Oxygen, % 11.91 11.57 11.55 11.677 Fuel Factor 1.33 1.31 1.32 Dry Volumetric Flow Rate, dry scfm 0 0 0 0.000 F-Factor, dscfm/MMBtu @ %O2 9190 9190 91909,190.000 Moisture, % 12.71 11.47 11.36 11.847 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 0 0 0 0.000 Operating Units No. Readings/Avg. 0 0 0 0.000 Calibration Set 4 4 4 4.000 Calibration Pre Zero Cylinder ID XC028023BXC028023BXC028023B Calibration Pre Zero Cylinder Instrument Response -0.37 -3.45 -3.44 -2.420 Calibration Pre Zero Cylinder Bias -0.15 -0.77 -0.77 -0.563 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC325309 CC325309 CC325309 Calibration Pre High Cylinder Instrument Response 209.66 211.02 211.75 210.810 Calibration Pre High Cylinder Bias -3.58 -3.31 -3.16 -3.350 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID XC028023BXC028023BXC028023B Calibration Post Zero Cylinder Instrument Response -3.45 -3.44 -3.41 -3.433 Calibration Post Zero Cylinder Bias -0.77 -0.77 -0.76 -0.767 Calibration Post Zero Cylinder Drift 0.62 0 0.01 0.210 Calibration Post High Cylinder ID CC325309 CC325309 CC325309 Calibration Post High Cylinder Instrument Response 211.02 211.75 211.08 211.283 Calibration Post High Cylinder Bias -3.31 -3.16 -3.3 -3.257 Calibration Post High Cylinder Drift 0.27 0.15 0.14 0.187 Cavg 46.39 49.58 50.07 48.680 Cavg Units ppmvd ppmvd ppmvd Cgas 50.769 55.0662 55.5517 53.796 Cgas Units ppmvd ppmvd ppmvd Fuel Type Oil Oil Oil Fw 10320 10320 1032010,320.000 Fc 1420 1420 14201,420.000 Cgasw 0 0 0 0.000 Cgasw Units ppmvw



### Saturday, January 15, 2011 Page 28 of 29

### Utility Boiler MACT ICR - Mitchell Power Station Units 1 & 3

9/17/2010
LocationUnit 3 Stack Exit - OTM - 27/28 Average Run Number 1 2 3 Test Date 7/22/2010 7/22/2010 7/22/2010 Run Start Time 4:25:00 AM2:30:00 PM6:41:00 AM Run Finish Time 11:27:00 AM9:00:00 PM11:22:00 PM Net Traversing Points 24 24 24 Net Run Time, minutes 373 344.25 419.25 Nozzle Diameter, inches 0.317 0.317 0.317 0.317 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0035 1.0035 1.0035 1.004 Barometric Pressure, inches of Mercury 29.21 29.3 29.3 29.270 Average Orifice Meter Differential, inches H2O 0.44 0.45 0.45 0.447 Dry Gas Meter Volume Sampled, cubic feet 149.115 137.027 160.236 148.793 Average Dry Gas Meter Temperature, °F 91.42 99.79 91.04 94.083 Dry Gas Meter Volume Sampled, dscf 140.036 127.154 151.051 139.414 Total Moisture Liquid collected, g 286.7 252.2 315.3 284.733 Volume of Water Vapor, standard cubic feet 13.49 11.87 14.84 13.400 Moisture Content of Stack Gas, % 8.79 8.54 8.95 8.760 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.9121 0.9146 0.9105 0.912 Carbon Dioxide, % 7.52 7.46 4.61 6.530 Oxygen, % 10.71 10.79 14.45 11.983 Carbon Monoxide & Nitrogen, % 81.77 81.75 80.94 81.487 Fuel Factor 1.36 1.36 1.40 Dry Molecular Weight, lb/lb-Mole 29.63 29.63 29.32 29.527 Wet Molecular weight, lb/lb-Mole 28.61 28.64 28.31 28.520 Flue Gas Static Pressure, inches of H2O -2.119 -1.9 -1.9 -1.973 Absolute Flue Gas Pressure, inches of Mercury 29.05 29.16 29.16 29.123 Average Stack Gas Temperature, °F 289.54 291.96 287.75 289.750 Average Velocity Head, inches of H2O 1.0176058132 2356E-029.319963872

29932E-031.265388939

32538E-02 0.011

Average Stack Gas Velocity, feet/second 6.88 6.58 7.69 7.050 Stack Cross-Sectional Area, square feet 484.351 484.351 484.351 484.351 Dry Volumetric Flow Rate, dry scfm 124,728.6 119,683.3 140,030.0128,147.300 Actual Wet Volumetric Flue Gas Flow Rate, acfm 199,940.1 191,221.8 223,479.6204,880.500 Percent Isokinetic of Sampling Rate, % 266.0 272.7 227.4 255.367 Percent Excess Air, % 98.5 100.0 208.9 135.800 F-Factor, dscfm/MMBtu @ %O2 9190 9190 91909,190.000 Round Duct Diameter, inches 298 298 298 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10320 10320 1032010,320.000 Fc 1420 1420 14201,420.000



### Saturday, January 15, 2011 Page 29 of 29