### Name:

Title: Company: Sign Date: Name: Title: Company: Sign Date: Permitted Facility Representative / Date Testing Company Representative / Date 

## ICR Walter Scott Jr. Energy Center 4

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.

Monday, February 14, 2011 Page 1 of 32

### ICR Walter Scott Jr. Energy Center 4

Facility Information: Walter Scott Jr. Energy Center 4 7215 Navajo Street

Council Bluffs IA51501 Contact:Mark Podany Phone: 7123665363 Fax: 7123665314 Email: MBPodany@midamerican.com Testing Company: Comprehensive Emission Services
P.O. Box 910

Waukee IA 50263 Contact:Tim Titus Phone:5159870200 Fax: 5159876604 Email: tim@testces.com

Air Permit Number: 1082 Permitted Source ID/Name: Enter the Boiler ID of the tested boiler (left) 4 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: Subbituminous pulverized coal, wall-fired, dry bottom boiler. Emission control equipment includes: low NOx Burners with overfire air, selective catalytic reduction, activated carbon injection, dry flue gas desulfurization, and baghouse. Industry/SCC/NAIS221112

Sampling Location Information:

Test Parameter Information: AFS #: 1915500115 FRS #: 110000414383

SCC / Description10100222 External Combustion Boilers - Electric Generation - Bituminous/Subbituminous Coal - Pulverized Coal: Dry Bottom (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 295.56 3096 2652 4 0 12 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location 2,3,7,8-TCDD Method 23 3 480 0 Stack Exit 1,2,3,7,8-PeCDD Method 23 3 480 0 Stack Exit 1,2,3,4,7,8-HxCDD Method 23 3 480 0 Stack Exit 1,2,3,6,7,8-HxCDD Method 23 3 480 0 Stack Exit 1,2,3,7,8,9-HxCDD Method 23 3 480 0 Stack Exit 1,2,3,4,6,7,8-HpCDD Method 23 3 480 0 Stack Exit OCDD Method 23 3 480 0 Stack Exit



### Monday, February 14, 2011 Page 2 of 32

### ICR Walter Scott Jr. Energy Center 4

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.

2,3,7,8-TCDF Method 23 3 480 0 Stack Exit 1,2,3,7,8-PeCDF Method 23 3 480 0 Stack Exit 2,3,4,7,8-PeCDF Method 23 3 480 0 Stack Exit 1,2,3,4,7,8-HxCDF Method 23 3 480 0 Stack Exit 1,2,3,6,7,8-HxCDF Method 23 3 480 0 Stack Exit 2,3,4,6,7,8-HxCDF Method 23 3 480 0 Stack Exit 1,2,3,7,8,9-HxCDF Method 23 3 480 0 Stack Exit 1,2,3,4,6,7,8-HpCDF Method 23 3 480 0 Stack Exit 1,2,3,4,7,8,9-HpCDF Method 23 3 480 0 Stack Exit OCDF Method 23 3 480 0 Stack Exit Total Dioxins Method 23 3 480 0 Stack Exit Total Furans Method 23 3 480 0 Stack Exit 3,3',4,4'-TCB (PCB77) Method 23 3 480 0 Stack Exit 3,4,4',5-TCB (PCB81) Method 23 3 480 0 Stack Exit 2,3,3',4,4'-PeCB (PCB105) Method 23 3 480 0 Stack Exit 2,3,4,4',5-PeCB (PCB114) Method 23 3 480 0 Stack Exit 2,3',4,4',5-PeCB (PCB118) Method 23 3 480 0 Stack Exit 2',3,4,4',5-PeCB (PCB123) Method 23 3 480 0 Stack Exit 3,3',4,4',5-PeCB (PCB126) Method 23 3 480 0 Stack Exit 2,3,3',4,4',5/2,3,3',4,4',5'-

HxCB (PCBs156/157) Method 23 3 480 0 Stack Exit

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

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

(TOC) as Propane Method 25A 3 120 0 Stack Exit
Hydrogen Chloride Method 26A 3 60 0 Stack Exit Hydrogen Fluoride Method 26A 3 60 0 Stack Exit Total PM2.5 OTM - 27/28 3 240 0 Stack Exit Inorganic (Aqueous)

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

Filterable PM2.5 OTM - 27/28 3 240 0 Stack Exit Organic Condensible

Particulate OTM - 27/28 3 240 0 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 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 Mercury 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 O2 Method 3A O2 4 480 0 Stack Exit Co2 Method 3A CO2 4 480 0 Stack Exit



### Monday, February 14, 2011 Page 3 of 32

### ICR Walter Scott Jr. Energy Center 4

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. Week of May 6 2010



### Monday, February 14, 2011 Page 4 of 32

### ICR Walter Scott Jr. Energy Center 4

Sampling / Stack Data Results Summary



### Location Stack Exit - Method 23 Average Run Number 1 2 3
Test Date 4/6/2010 4/7/2010 4/8/2010 Run Start Time 8:57:00 AM 7:50:00 AM 7:43:00 AM

Run Finish Time 5:32:00 PM4:14:00 PM 6:06:00 PM Net Run Time, minutes 480 480 480 Dry Gas Meter Volume Sampled, dscf 356.905 322.643 329.716 336.421 Moisture Content of Stack Gas, % 18.07 17.20 17.36 17.543 Moisture Saturation at Stack Gas Temperature, % 74.15 66.55 69.35 70.017 Carbon Dioxide, % 13.6 13.5 13.4 13.500 Oxygen, % 5.9 6.1 6.4 6.133 Average Stack Gas Temperature, °F 194.75 190.00 192.50 192.417 Dry Volumetric Flow Rate, dry scfm 1,822,167.61,813,617.1 1,851,315.9 1,829,033.53 3 Actual Wet Volumetric Flue Gas Flow Rate, acfm 2,912,741.72,827,837.9 2,868,145.7 2,869,575.10 0 Percent Isokinetic of Sampling Rate, % 103.0 105.7 105.8 104.833 F-Factor, dscfm/MMBtu @ %O2 9820 9820 9820 9,820.000
Fw
Fc 1840 1840 1840 1,840.000



### Location Stack Exit - Method 25A Average Run Number 1 2 3
Test Date 4/7/2010 4/7/2010 4/7/2010
Run Start Time 8:20:00 AM 10:43:00 AM 1:02:00 PM

Run Finish Time 10:20:00 AM 12:43:00 PM 3:02:00 PM

Carbon Dioxide, % 13.5 13.7 13.6 13.600 Oxygen, % 6.1 6.1 6.1 6.100 Dry Volumetric Flow Rate, dry scfm 1846249.1 1846249.1 1880872.9 1,857,790.36 7 F-Factor, dscfm/MMBtu @ %O2 9820 9820 9820 9,820.000 Moisture, % 15.75 15.75 15.44 15.647 Fuel Type Override Override Override
Fw
Fc 1800 1800 1800 1,800.000



### Monday, February 14, 2011 Page 5 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 26A 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 Stack Exit - Method 29 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



### Monday, February 14, 2011 Page 6 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 3A CO2 Average Run Number 1 2 3
Test Date 4/6/2010 4/7/2010 4/8/2010 Run Start Time 8:57:00 AM 7:50:00 AM 8:01:00 AM

Run Finish Time 5:32:00 PM5:34:00 PM 6:08:00 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



### Location Stack Exit - Method 3A CO2 3 Average Run Number 4
Test Date 4/9/2010 Run Start Time 11:24:00 AM
Run Finish Time 3:10:00 PM Carbon Dioxide, % 0 0.000 Oxygen, % 0 0.000 Dry Volumetric Flow Rate, dry scfm 0 0.000 F-Factor, dscfm/MMBtu @ %O2 0 0.000 Moisture, % 0 0.000 Fuel Type
Fw 0 0.000
Fc 0 0.000



### Monday, February 14, 2011 Page 7 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 3A O2 Average Run Number 1 2 3
Test Date 4/6/2010 4/7/2010 4/8/2010 Run Start Time 8:57:00 AM 7:50:00 AM 8:01:00 AM

Run Finish Time 5:32:00 PM5:34:00 PM 6:08:00 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



### Location Stack Exit - Method 3A O2 3 Average Run Number 4
Test Date 4/9/2010 Run Start Time 11:24:00 AM
Run Finish Time 3:10:00 PM Carbon Dioxide, % 0 0.000 Oxygen, % 0 0.000 Dry Volumetric Flow Rate, dry scfm 0 0.000 F-Factor, dscfm/MMBtu @ %O2 0 0.000 Moisture, % 0 0.000 Fuel Type
Fw 0 0.000
Fc 0 0.000



### Monday, February 14, 2011 Page 8 of 32

### ICR Walter Scott Jr. Energy Center 4

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, % 4/8/2010 4/8/2010 4/9/2010 Moisture Saturation at Stack Gas Temperature, % OTM - 27/28 OTM - 27/28OTM - 27/28

Carbon Dioxide, % 7:28:00 AM2:09:00 PM11:13:00 AM Oxygen, % 12:34:00 PM6:04:00 PM 3:14:00 PM Average Stack Gas Temperature, °F 0.26 0.26 0.26 0.260 Dry Volumetric Flow Rate, dry scfm 67.41 73.38 74.75 71.847 Actual Wet Volumetric Flue Gas Flow Rate, acfm 0.8494 0.8545 0.8435 0.849 Percent Isokinetic of Sampling Rate, % 13.2 13.2 13.3 13.233 F-Factor, dscfm/MMBtu @ %O2 80.4 80.4 80.4 80.400
Fw 30.37 30.37 30.38 30.373
Fc 1.10 1.10 1.10 1.100



### Monday, February 14, 2011 Page 9 of 32

### ICR Walter Scott Jr. Energy Center 4

Emissions Summary



### Location: Stack Exit - Method 23 Compound: 1,2,3,4,6,7,8-HpCDD Average RunNumber 1 2 3 Mass_mg 0.00000002501 0.00000001187 0.00000001028 0.000 lb/mmBtuCO2 2.09E-12 1.11E-12 9.44E-13 0.000 lb/mmBtuO2 2.11E-12 1.12E-12 9.73E-13 0.000 mg/dscm 2.48E-09 1.30E-09 1.10E-09 0.000 mg/dscm@7%O2 2.30E-09 1.22E-09 1.05E-09 0.000 ng/dscm 2.48E-03 1.30E-03 1.10E-03 0.002 ng/dscm@7%O2 2.30E-03 1.22E-03 1.05E-03 0.002 

### Compound: 1,2,3,4,6,7,8-HpCDF Average RunNumber 1 2 3 Mass_mg 0.00000001506 0.00000000859 0.00000000578 0.000 lb/mmBtuCO2 1.26E-12 8.00E-13 5.31E-13 0.000 lb/mmBtuO2 1.27E-12 8.14E-13 5.47E-13 0.000 mg/dscm 1.49E-09 9.40E-10 6.19E-10 0.000 mg/dscm@7%O2 1.38E-09 8.83E-10 5.93E-10 0.000 ng/dscm 1.49E-03 9.40E-04 6.19E-04 0.001 ng/dscm@7%O2 1.38E-03 8.83E-04 5.93E-04 0.001 

### Compound: 1,2,3,4,7,8,9-HpCDF Average RunNumber 1 2 3 Mass_mg 0.00000002105 0.000000012 0.00000000807 0.000 lb/mmBtuCO2 1.76E-12 1.12E-12 7.41E-13 0.000 lb/mmBtuO2 1.78E-12 1.14E-12 7.64E-13 0.000 mg/dscm 2.08E-09 1.31E-09 8.64E-10 0.000 mg/dscm@7%O2 1.93E-09 1.23E-09 8.28E-10 0.000 ng/dscm 2.08E-03 1.31E-03 8.64E-04 0.001 ng/dscm@7%O2 1.93E-03 1.23E-03 8.28E-04 0.001 

### Compound: 1,2,3,4,7,8-HxCDD Average RunNumber 1 2 3 Mass_mg 0.00000002067 0.00000001351 0.00000001098 0.000 lb/mmBtuCO2 1.73E-12 1.26E-12 1.01E-12 0.000 lb/mmBtuO2 1.75E-12 1.28E-12 1.04E-12 0.000 mg/dscm 2.05E-09 1.48E-09 1.18E-09 0.000 mg/dscm@7%O2 1.90E-09 1.39E-09 1.13E-09 0.000 ng/dscm 2.05E-03 1.48E-03 1.18E-03 0.002 ng/dscm@7%O2 1.90E-03 1.39E-03 1.13E-03 0.001 

### Compound: 1,2,3,4,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000001898 0.00000001059 0.00000000925 0.000 lb/mmBtuCO2 1.59E-12 9.86E-13 8.49E-13 0.000 lb/mmBtuO2 1.60E-12 1.00E-12 8.75E-13 0.000



### Monday, February 14, 2011 Page 10 of 32

### ICR Walter Scott Jr. Energy Center 4

mg/dscm 1.88E-09 1.16E-09 9.91E-10 0.000 mg/dscm@7%O2 1.74E-09 1.09E-09 9.50E-10 0.000 ng/dscm 1.88E-03 1.16E-03 9.91E-04 0.001 ng/dscm@7%O2 1.74E-03 1.09E-03 9.50E-04 0.001 

### Compound: 1,2,3,6,7,8-HxCDD Average RunNumber 1 2 3 Mass_mg 0.00000001786 0.00000001167 0.00000000948 0.000 lb/mmBtuCO2 1.49E-12 1.09E-12 8.70E-13 0.000 lb/mmBtuO2 1.51E-12 1.11E-12 8.97E-13 0.000 mg/dscm 1.77E-09 1.28E-09 1.02E-09 0.000 mg/dscm@7%O2 1.64E-09 1.20E-09 9.78E-10 0.000 ng/dscm 1.77E-03 1.28E-03 1.02E-03 0.001 ng/dscm@7%O2 1.64E-03 1.20E-03 9.78E-04 0.001 

### Compound: 1,2,3,6,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000001618 0.00000000903 0.00000000789 0.000 lb/mmBtuCO2 1.35E-12 8.41E-13 7.24E-13 0.000 lb/mmBtuO2 1.37E-12 8.56E-13 7.47E-13 0.000 mg/dscm 1.60E-09 9.89E-10 8.45E-10 0.000 mg/dscm@7%O2 1.48E-09 9.29E-10 8.10E-10 0.000 ng/dscm 1.60E-03 9.89E-04 8.45E-04 0.001 ng/dscm@7%O2 1.48E-03 9.29E-04 8.10E-04 0.001 

### Compound: 1,2,3,7,8,9-HxCDD Average RunNumber 1 2 3 Mass_mg 0.00000002047 0.00000001338 0.00000001087 0.000 lb/mmBtuCO2 1.71E-12 1.25E-12 9.98E-13 0.000 lb/mmBtuO2 1.73E-12 1.27E-12 1.03E-12 0.000 mg/dscm 2.03E-09 1.46E-09 1.16E-09 0.000 mg/dscm@7%O2 1.88E-09 1.37E-09 1.11E-09 0.000 ng/dscm 2.03E-03 1.46E-03 1.16E-03 0.002 ng/dscm@7%O2 1.88E-03 1.37E-03 1.11E-03 0.001 

### Compound: 1,2,3,7,8,9-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000002352 0.00000001312 0.00000001146 0.000 lb/mmBtuCO2 1.97E-12 1.22E-12 1.05E-12 0.000 lb/mmBtuO2 1.99E-12 1.24E-12 1.08E-12 0.000 mg/dscm 2.33E-09 1.44E-09 1.23E-09 0.000 mg/dscm@7%O2 2.16E-09 1.35E-09 1.18E-09 0.000 ng/dscm 2.33E-03 1.44E-03 1.23E-03 0.002 ng/dscm@7%O2 2.16E-03 1.35E-03 1.18E-03 0.002 

### Compound: 1,2,3,7,8-PeCDD Average RunNumber 1 2 3 Mass_mg 0.00000002707 0.00000001463 0.00000000817 0.000 lb/mmBtuCO2 2.26E-12 1.36E-12 7.50E-13 0.000



### Monday, February 14, 2011 Page 11 of 32

### ICR Walter Scott Jr. Energy Center 4

lb/mmBtuO2 2.29E-12 1.39E-12 7.73E-13 0.000 mg/dscm 2.68E-09 1.60E-09 8.75E-10 0.000 mg/dscm@7%O2 2.48E-09 1.50E-09 8.39E-10 0.000 ng/dscm 2.68E-03 1.60E-03 8.75E-04 0.002 ng/dscm@7%O2 2.48E-03 1.50E-03 8.39E-04 0.002 

### Compound: 1,2,3,7,8-PeCDF Average RunNumber 1 2 3 Mass_mg 0.00000002018 0.00000001161 0.00000000733 0.000 lb/mmBtuCO2 1.69E-12 1.08E-12 6.73E-13 0.000 lb/mmBtuO2 1.71E-12 1.10E-12 6.94E-13 0.000 mg/dscm 2.00E-09 1.27E-09 7.85E-10 0.000 mg/dscm@7%O2 1.85E-09 1.19E-09 7.53E-10 0.000 ng/dscm 2.00E-03 1.27E-03 7.85E-04 0.001 ng/dscm@7%O2 1.85E-03 1.19E-03 7.53E-04 0.001 

### Compound: 2,3,3',4,4',5,5'-HpCB (PCB189) Average RunNumber 1 2 3 Mass_mg 0.00000002211 0.00000002785 0.00000006785 0.000 lb/mmBtuCO2 1.85E-12 2.59E-12 6.23E-12 0.000 lb/mmBtuO2 1.87E-12 2.64E-12 6.42E-12 0.000 mg/dscm 2.19E-09 3.05E-09 7.27E-09 0.000 mg/dscm@7%O2 2.03E-09 2.86E-09 6.97E-09 0.000 ng/dscm 2.19E-03 3.05E-03 7.27E-03 0.004 ng/dscm@7%O2 2.03E-03 2.86E-03 6.97E-03 0.004 

### Compound: 2,3,3',4,4',5/2,3,3',4,4',5'-HxCB (PC Average RunNumber 1 2 3 Mass_mg 0.00000002829 0.00000029717 0.00000046442 0.000 lb/mmBtuCO2 2.36E-12 2.77E-11 4.26E-11 0.000 lb/mmBtuO2 2.39E-12 2.82E-11 4.40E-11 0.000 mg/dscm 2.80E-09 3.25E-08 4.97E-08 0.000 mg/dscm@7%O2 2.59E-09 3.05E-08 4.76E-08 0.000 ng/dscm 2.80E-03 3.25E-02 4.97E-02 0.028 ng/dscm@7%O2 2.59E-03 3.05E-02 4.76E-02 0.027 

### Compound: 2,3,3',4,4'-PeCB (PCB105) Average RunNumber 1 2 3 Mass_mg 0.00000138044 0.00000109532 0.0000000216 0.000 lb/mmBtuCO2 1.15E-10 1.02E-10 1.98E-12 0.000 lb/mmBtuO2 1.17E-10 1.04E-10 2.04E-12 0.000 mg/dscm 1.37E-07 1.20E-07 2.31E-09 0.000 mg/dscm@7%O2 1.27E-07 1.13E-07 2.21E-09 0.000 ng/dscm 1.37E-01 1.20E-01 2.31E-03 0.086 ng/dscm@7%O2 1.27E-01 1.13E-01 2.21E-03 0.081 

### Compound: 2,3',4,4',5,5'-HxCB (PCB167) Average RunNumber 1 2 3 Mass_mg 0.00000055083 0.0000004568 0.00000082556 0.000



### Monday, February 14, 2011 Page 12 of 32

### ICR Walter Scott Jr. Energy Center 4

lb/mmBtuCO2 4.60E-11 4.25E-11 7.58E-11 0.000 lb/mmBtuO2 4.66E-11 4.33E-11 7.81E-11 0.000 mg/dscm 5.45E-08 5.00E-08 8.84E-08 0.000 mg/dscm@7%O2 5.05E-08 4.70E-08 8.47E-08 0.000 ng/dscm 5.45E-02 5.00E-02 8.84E-02 0.064 ng/dscm@7%O2 5.05E-02 4.70E-02 8.47E-02 0.061 

### Compound: 2,3,4,4',5-PeCB (PCB114) Average RunNumber 1 2 3 Mass_mg 0.00000001261 0.00000001475 0.00000002465 0.000 lb/mmBtuCO2 1.05E-12 1.37E-12 2.26E-12 0.000 lb/mmBtuO2 1.07E-12 1.40E-12 2.33E-12 0.000 mg/dscm 1.25E-09 1.61E-09 2.64E-09 0.000 mg/dscm@7%O2 1.16E-09 1.51E-09 2.53E-09 0.000 ng/dscm 1.25E-03 1.61E-03 2.64E-03 0.002 ng/dscm@7%O2 1.16E-03 1.51E-03 2.53E-03 0.002 

### Compound: 2,3',4,4',5-PeCB (PCB118) Average RunNumber 1 2 3 Mass_mg 0.0000037072 0.00000311106 0.00000533778 0.000 lb/mmBtuCO2 3.10E-10 2.90E-10 4.90E-10 0.000 lb/mmBtuO2 3.13E-10 2.95E-10 5.05E-10 0.000 mg/dscm 3.67E-07 3.41E-07 5.72E-07 0.000 mg/dscm@7%O2 3.40E-07 3.20E-07 5.48E-07 0.000 ng/dscm 3.67E-01 3.41E-01 5.72E-01 0.427 ng/dscm@7%O2 3.40E-01 3.20E-01 5.48E-01 0.403 

### Compound: 2',3,4,4',5-PeCB (PCB123) Average RunNumber 1 2 3 Mass_mg 0.00000324376 0.00000270446 0.00000002098 0.000 lb/mmBtuCO2 2.71E-10 2.52E-10 1.93E-12 0.000 lb/mmBtuO2 2.74E-10 2.56E-10 1.99E-12 0.000 mg/dscm 3.21E-07 2.96E-07 2.25E-09 0.000 mg/dscm@7%O2 2.97E-07 2.78E-07 2.16E-09 0.000 ng/dscm 3.21E-01 2.96E-01 2.25E-03 0.206 ng/dscm@7%O2 2.97E-01 2.78E-01 2.16E-03 0.192 

### Compound: 2,3,4,6,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000001893 0.00000001057 0.00000000923 0.000 lb/mmBtuCO2 1.58E-12 9.84E-13 8.47E-13 0.000 lb/mmBtuO2 1.60E-12 1.00E-12 8.74E-13 0.000 mg/dscm 1.87E-09 1.16E-09 9.89E-10 0.000 mg/dscm@7%O2 1.73E-09 1.09E-09 9.48E-10 0.000 ng/dscm 1.87E-03 1.16E-03 9.89E-04 0.001 ng/dscm@7%O2 1.73E-03 1.09E-03 9.48E-04 0.001 

### Compound: 2,3,4,7,8-PeCDF Average RunNumber 1 2 3



### Monday, February 14, 2011 Page 13 of 32

### ICR Walter Scott Jr. Energy Center 4

Mass_mg 0.0000000203 0.00000001168 0.00000000737 0.000 lb/mmBtuCO2 1.70E-12 1.09E-12 6.77E-13 0.000 lb/mmBtuO2 1.72E-12 1.11E-12 6.98E-13 0.000 mg/dscm 2.01E-09 1.28E-09 7.89E-10 0.000 mg/dscm@7%O2 1.86E-09 1.20E-09 7.56E-10 0.000 ng/dscm 2.01E-03 1.28E-03 7.89E-04 0.001 ng/dscm@7%O2 1.86E-03 1.20E-03 7.56E-04 0.001 

### Compound: 2,3,7,8-TCDD Average RunNumber 1 2 3 Mass_mg 0.00000001554 0.00000000875 0.00000000552 0.000 lb/mmBtuCO2 1.30E-12 8.15E-13 5.07E-13 0.000 lb/mmBtuO2 1.31E-12 8.29E-13 5.22E-13 0.000 mg/dscm 1.54E-09 9.58E-10 5.91E-10 0.000 mg/dscm@7%O2 1.43E-09 9.00E-10 5.67E-10 0.000 ng/dscm 1.54E-03 9.58E-04 5.91E-04 0.001 ng/dscm@7%O2 1.43E-03 9.00E-04 5.67E-04 0.001 

### Compound: 2,3,7,8-TCDF Average RunNumber 1 2 3 Mass_mg 0.00000001544 0.00000000978 0.000000005 0.000 lb/mmBtuCO2 1.29E-12 9.11E-13 4.59E-13 0.000 lb/mmBtuO2 1.30E-12 9.27E-13 4.73E-13 0.000 mg/dscm 1.53E-09 1.07E-09 5.36E-10 0.000 mg/dscm@7%O2 1.42E-09 1.00E-09 5.14E-10 0.000 ng/dscm 1.53E-03 1.07E-03 5.36E-04 0.001 ng/dscm@7%O2 1.42E-03 1.00E-03 5.14E-04 0.001 

### Compound: 3,3',4,4',5,5'-HxCB (PCB169) Average RunNumber 1 2 3 Mass_mg 0.0000000172 0.00000001703 0.00000002977 0.000 lb/mmBtuCO2 1.44E-12 1.59E-12 2.73E-12 0.000 lb/mmBtuO2 1.45E-12 1.61E-12 2.82E-12 0.000 mg/dscm 1.70E-09 1.86E-09 3.19E-09 0.000 mg/dscm@7%O2 1.58E-09 1.75E-09 3.06E-09 0.000 ng/dscm 1.70E-03 1.86E-03 3.19E-03 0.002 ng/dscm@7%O2 1.58E-03 1.75E-03 3.06E-03 0.002 

### Compound: 3,3',4,4',5-PeCB (PCB126) Average RunNumber 1 2 3 Mass_mg 0.00000005397 0.00000001805 0.00000002803 0.000 lb/mmBtuCO2 4.51E-12 1.68E-12 2.57E-12 0.000 lb/mmBtuO2 4.56E-12 1.71E-12 2.65E-12 0.000 mg/dscm 5.34E-09 1.98E-09 3.00E-09 0.000 mg/dscm@7%O2 4.95E-09 1.86E-09 2.88E-09 0.000 ng/dscm 5.34E-03 1.98E-03 3.00E-03 0.003 ng/dscm@7%O2 4.95E-03 1.86E-03 2.88E-03 0.003 

### Compound: 3,3',4,4'-TCB (PCB77) Average



### Monday, February 14, 2011 Page 14 of 32

### ICR Walter Scott Jr. Energy Center 4

RunNumber 1 2 3 Mass_mg 0.00000007871 0.00000010348 0.00000002926 0.000 lb/mmBtuCO2 6.58E-12 9.64E-12 2.69E-12 0.000 lb/mmBtuO2 6.65E-12 9.81E-12 2.77E-12 0.000 mg/dscm 7.79E-09 1.13E-08 3.13E-09 0.000 mg/dscm@7%O2 7.22E-09 1.06E-08 3.00E-09 0.000 ng/dscm 7.79E-03 1.13E-02 3.13E-03 0.007 ng/dscm@7%O2 7.22E-03 1.06E-02 3.00E-03 0.007 

### Compound: 3,4,4',5-TCB (PCB81) Average RunNumber 1 2 3 Mass_mg 0.0000004309 0.00000048034 0.00000003245 0.000 lb/mmBtuCO2 3.60E-11 4.47E-11 2.98E-12 0.000 lb/mmBtuO2 3.64E-11 4.55E-11 3.07E-12 0.000 mg/dscm 4.26E-08 5.26E-08 3.48E-09 0.000 mg/dscm@7%O2 3.95E-08 4.94E-08 3.34E-09 0.000 ng/dscm 4.26E-02 5.26E-02 3.48E-03 0.033 ng/dscm@7%O2 3.95E-02 4.94E-02 3.34E-03 0.031 

### Compound: OCDD Average RunNumber 1 2 3 Mass_mg 0.00000003451 0.00000001685 0.00000001047 0.000 lb/mmBtuCO2 2.88E-12 1.57E-12 9.61E-13 0.000 lb/mmBtuO2 2.92E-12 1.60E-12 9.91E-13 0.000 mg/dscm 3.42E-09 1.84E-09 1.12E-09 0.000 mg/dscm@7%O2 3.17E-09 1.73E-09 1.07E-09 0.000 ng/dscm 3.42E-03 1.84E-03 1.12E-03 0.002 ng/dscm@7%O2 3.17E-03 1.73E-03 1.07E-03 0.002 

### Compound: OCDF Average RunNumber 1 2 3 Mass_mg 0.00000003847 0.00000001921 0.00000001259 0.000 lb/mmBtuCO2 3.22E-12 1.79E-12 1.16E-12 0.000 lb/mmBtuO2 3.25E-12 1.82E-12 1.19E-12 0.000 mg/dscm 3.81E-09 2.10E-09 1.35E-09 0.000 mg/dscm@7%O2 3.53E-09 1.97E-09 1.29E-09 0.000 ng/dscm 3.81E-03 2.10E-03 1.35E-03 0.002 ng/dscm@7%O2 3.53E-03 1.97E-03 1.29E-03 0.002 

### Compound: Total Dioxins Average RunNumber 1 2 3 Mass_mg 0.00000008037 0.00000004363 0.00000003079 0.000 lb/mmBtuCO2 6.72E-12 4.06E-12 2.83E-12 0.000 lb/mmBtuO2 6.79E-12 4.13E-12 2.91E-12 0.000 mg/dscm 7.95E-09 4.78E-09 3.30E-09 0.000 mg/dscm@7%O2 7.37E-09 4.49E-09 3.16E-09 0.000 ng/dscm 7.95E-03 4.78E-03 3.30E-03 0.005 ng/dscm@7%O2 7.37E-03 4.49E-03 3.16E-03 0.005



### Monday, February 14, 2011 Page 15 of 32

### ICR Walter Scott Jr. Energy Center 4

Compound: Total Furans Average RunNumber 1 2 3 Mass_mg 0.00000007192 0.00000004186 0.00000002824 0.000 lb/mmBtuCO2 6.01E-12 3.90E-12 2.59E-12 0.000 lb/mmBtuO2 6.08E-12 3.97E-12 2.67E-12 0.000 mg/dscm 7.12E-09 4.58E-09 3.03E-09 0.000 mg/dscm@7%O2 6.60E-09 4.30E-09 2.90E-09 0.000 ng/dscm 7.12E-03 4.58E-03 3.03E-03 0.005 ng/dscm@7%O2 6.60E-03 4.30E-03 2.90E-03 0.005



### Location: Stack Exit - Method 25A Compound: Total organic compounds (TOC) as Average Run 1 2 3 lb/mmBtuCO2 5.88E-04 0.00E+00 0.00E+00 0.000 lb/mmBtuO2 6.11E-04 0.00E+00 0.00E+00 0.000 ppm 3.85E-01 0.00E+00 0.00E+00 0.128 ppm@7%O2 3.62E-01 0.00E+00 0.00E+00 0.121



### Location: Stack Exit - Method 26A Compound: Hydrogen Chloride Average RunNumber 1 2 3 Mass_mg 0.209 0.04 0.04 0.096 Elb/hr 1.31E+00 2.50E-01 2.50E-01 0.603 lb/mmBtuCO2 1.57E-04 3.03E-05 3.00E-05 0.000 lb/mmBtuO2 1.60E-04 3.07E-05 3.05E-05 0.000 mg/dscm 1.82E-01 3.48E-02 3.47E-02 0.084 mg/dscm@7%O2 1.73E-01 3.34E-02 3.30E-02 0.080 

### Compound: Hydrogen Fluoride Average RunNumber 1 2 3 Mass_mg 0.02 0.02 0.02 0.020 Elb/hr 1.25E-01 1.25E-01 1.25E-01 0.125 lb/mmBtuCO2 1.51E-05 1.51E-05 1.50E-05 0.000 lb/mmBtuO2 1.53E-05 1.54E-05 1.52E-05 0.000 mg/dscm 1.74E-02 1.74E-02 1.74E-02 0.017 mg/dscm@7%O2 1.66E-02 1.67E-02 1.66E-02 0.017



### Location: Stack Exit - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.00983 0.00941 0.0083 0.009 Elb/hr 1.36E-02 1.47E-02 1.30E-02 0.014 lb/mmBtuCO2 1.64E-06 1.81E-06 1.58E-06 0.000 lb/mmBtuO2 1.66E-06 1.84E-06 1.60E-06 0.000 mg/dscm 1.96E-03 2.13E-03 1.85E-03 0.002 mg/dscm@7%O2 1.80E-03 2.00E-03 1.74E-03 0.002 ug/dscm 1.96E+00 2.13E+00 1.85E+00 1.980


### Monday, February 14, 2011 Page 16 of 32

### ICR Walter Scott Jr. Energy Center 4

Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.0013 0.0007 0.00094 0.001 Elb/hr 1.80E-03 1.09E-03 1.47E-03 0.001 lb/mmBtuCO2 2.17E-07 1.35E-07 1.79E-07 0.000 lb/mmBtuO2 2.19E-07 1.37E-07 1.81E-07 0.000 mg/dscm 2.59E-04 1.58E-04 2.09E-04 0.000 mg/dscm@7%O2 2.38E-04 1.48E-04 1.96E-04 0.000 ug/dscm 2.59E-01 1.58E-01 2.09E-01 0.209 

### Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.000021 0.000011 0.000011 0.000 Elb/hr 2.90E-05 1.72E-05 1.72E-05 0.000 lb/mmBtuCO2 3.50E-09 2.11E-09 2.10E-09 0.000 lb/mmBtuO2 3.54E-09 2.15E-09 2.12E-09 0.000 mg/dscm 4.18E-06 2.49E-06 2.45E-06 0.000 mg/dscm@7%O2 3.85E-06 2.34E-06 2.30E-06 0.000 ug/dscm 4.18E-03 2.49E-03 2.45E-03 0.003 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.000083 0.000041 0.000013 0.000 Elb/hr 1.15E-04 6.41E-05 2.04E-05 0.000 lb/mmBtuCO2 1.38E-08 7.88E-09 2.48E-09 0.000 lb/mmBtuO2 1.40E-08 8.02E-09 2.50E-09 0.000 mg/dscm 1.65E-05 9.27E-06 2.89E-06 0.000 mg/dscm@7%O2 1.52E-05 8.71E-06 2.71E-06 0.000 ug/dscm 1.65E-02 9.27E-03 2.89E-03 0.010 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.00997 0.00583 0.00451 0.007 Elb/hr 1.38E-02 9.11E-03 7.06E-03 0.010 lb/mmBtuCO2 1.66E-06 1.12E-06 8.60E-07 0.000 lb/mmBtuO2 1.68E-06 1.14E-06 8.68E-07 0.000 mg/dscm 1.98E-03 1.32E-03 1.00E-03 0.001 mg/dscm@7%O2 1.82E-03 1.24E-03 9.39E-04 0.001 ug/dscm 1.98E+00 1.32E+00 1.00E+00 1.433 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.002 0.00223 0.00124 0.002 Elb/hr 2.77E-03 3.49E-03 1.94E-03 0.003 lb/mmBtuCO2 3.34E-07 4.29E-07 2.36E-07 0.000 lb/mmBtuO2 3.38E-07 4.36E-07 2.39E-07 0.000 mg/dscm 3.98E-04 5.04E-04 2.76E-04 0.000 mg/dscm@7%O2 3.66E-04 4.73E-04 2.59E-04 0.000



### Monday, February 14, 2011 Page 17 of 32

### ICR Walter Scott Jr. Energy Center 4

ug/dscm 3.98E-01 5.04E-01 2.76E-01 0.393 

### Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 24.8 16.9 13.7 18.467 Elb/hr 3.43E+01 2.64E+01 2.15E+01 27.400 lb/mmBtuCO2 4.14E-03 3.25E-03 2.61E-03 0.003 lb/mmBtuO2 4.19E-03 3.31E-03 2.64E-03 0.003 mg/dscm 4.93E+00 3.82E+00 3.05E+00 3.933 mg/dscm@7%O2 4.54E+00 3.59E+00 2.86E+00 3.663 ug/dscm 4.93E+03 3.82E+03 3.05E+03 3,933.333 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.00758 0.00807 0.00729 0.008 Elb/hr 1.05E-02 1.26E-02 1.14E-02 0.012 lb/mmBtuCO2 1.26E-06 1.55E-06 1.39E-06 0.000 lb/mmBtuO2 1.28E-06 1.58E-06 1.40E-06 0.000 mg/dscm 1.51E-03 1.82E-03 1.62E-03 0.002 mg/dscm@7%O2 1.39E-03 1.71E-03 1.52E-03 0.002 ug/dscm 1.51E+00 1.82E+00 1.62E+00 1.650 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.5664 0.01276 0.01635 0.199 Elb/hr 7.83E-01 1.99E-02 2.56E-02 0.276 lb/mmBtuCO2 9.45E-05 2.45E-06 3.12E-06 0.000 lb/mmBtuO2 9.56E-05 2.50E-06 3.15E-06 0.000 mg/dscm 1.13E-01 2.88E-03 3.64E-03 0.040 mg/dscm@7%O2 1.04E-01 2.70E-03 3.42E-03 0.037 ug/dscm 1.13E+02 2.88E+00 3.64E+00 39.840 

### Compound: Mercury Average RunNumber 1 2 3 Mass_mg 0.01758 0.01561 0.01451 0.016 Elb/hr 2.43E-02 2.44E-02 2.27E-02 0.024 lb/mmBtuCO2 2.93E-06 3.00E-06 2.77E-06 0.000 lb/mmBtuO2 2.97E-06 3.05E-06 2.79E-06 0.000 mg/dscm 3.50E-03 3.53E-03 3.23E-03 0.003 mg/dscm@7%O2 3.22E-03 3.32E-03 3.03E-03 0.003 ug/dscm 3.50E+00 3.53E+00 3.23E+00 3.420 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.01079 0.00869 0.00999 0.010 Elb/hr 1.49E-02 1.36E-02 1.56E-02 0.015 lb/mmBtuCO2 1.80E-06 1.67E-06 1.90E-06 0.000 lb/mmBtuO2 1.82E-06 1.70E-06 1.92E-06 0.000 mg/dscm 2.15E-03 1.96E-03 2.22E-03 0.002



### Monday, February 14, 2011 Page 18 of 32

### ICR Walter Scott Jr. Energy Center 4

mg/dscm@7%O2 1.98E-03 1.84E-03 2.09E-03 0.002 ug/dscm 2.15E+00 1.96E+00 2.22E+00 2.110 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.00667 0.00517 0.01552 0.009 Elb/hr 9.22E-03 8.08E-03 2.43E-02 0.014 lb/mmBtuCO2 1.11E-06 9.94E-07 2.96E-06 0.000 lb/mmBtuO2 1.13E-06 1.01E-06 2.99E-06 0.000 mg/dscm 1.33E-03 1.17E-03 3.45E-03 0.002 mg/dscm@7%O2 1.22E-03 1.10E-03 3.24E-03 0.002 ug/dscm 1.33E+00 1.17E+00 3.45E+00 1.983



### Location: Stack Exit - OTM - 27/28 Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 0.8 1.8 2.1 1.567 Elb/hr 2.55E+00 6.19E+00 7.20E+00 5.313 lb/mmBtuCO2 3.11E-04 7.56E-04 8.86E-04 0.001 lb/mmBtuO2 3.15E-04 7.67E-04 9.01E-04 0.001 mg/dscm 3.57E-01 8.68E-01 1.03E+00 0.752 mg/dscm@7%O2 3.42E-01 8.32E-01 9.81E-01 0.718 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 3.5 0 2.4 1.967 Elb/hr 1.12E+01 0.00E+00 8.22E+00 6.473 lb/mmBtuCO2 1.36E-03 0.00E+00 1.01E-03 0.001 lb/mmBtuO2 1.38E-03 0.00E+00 1.03E-03 0.001 mg/dscm 1.56E+00 0.00E+00 1.17E+00 0.910 mg/dscm@7%O2 1.50E+00 0.00E+00 1.11E+00 0.870 

### Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 2 1.2 0.4 1.200 Elb/hr 6.39E+00 4.13E+00 1.37E+00 3.963 lb/mmBtuCO2 7.77E-04 5.04E-04 1.69E-04 0.000 lb/mmBtuO2 7.89E-04 5.12E-04 1.72E-04 0.000 mg/dscm 8.93E-01 5.79E-01 1.95E-01 0.556 mg/dscm@7%O2 8.56E-01 5.55E-01 1.86E-01 0.532 

### Compound: Total PM2.5 Average RunNumber 1 2 3 Mass_mg 6.3 3 4.9 4.733 Elb/hr 2.01E+01 1.03E+01 1.68E+01 15.733 lb/mmBtuCO2 2.45E-03 1.26E-03 2.07E-03 0.002 lb/mmBtuO2 2.48E-03 1.28E-03 2.10E-03 0.002 mg/dscm 2.81E+00 1.45E+00 2.39E+00 2.217



### Monday, February 14, 2011 Page 19 of 32

### ICR Walter Scott Jr. Energy Center 4

Process Run Data mg/dscm@7%O2 2.69E+00 1.39E+00 2.28E+00 2.120



### Monday, February 14, 2011 Page 20 of 32

### ICR Walter Scott Jr. Energy Center 4

Process Run Data

APCD Run Data 

### Run Name Value UOM Comments Target Value 1 Subbituminous Coal Burned 454 1000 Tons May 6 2010 450


### 2 Subbituminous Coal Burned 452.35 1000 Tons May 7 2010 450
3 Subbituminous Coal Burned 447.14 1000 Tons May 8 2010 450
4 Subbituminous Coal Burned 5498.5 1000 Tons May 9 2010 450


### 1 Average Heat Input 7375.9 MMBtu/hr May 6 2010 7200
2 Average Heat Input 7248.7 MMBtu/hr May 7 2010 7200
3 Average Heat Input 7177.2 MMBtu/hr May 8 2010 7200


### 4 Average Heat Input 7444.8 MMBtu/hr May 9 2010 7200
1 Steam Output 55891000 lb steam/hr May 6 2010 5500
2 Steam Output 5539.21000 lb steam/hr May 7 2010 5500


### 3 Steam Output 5432.31000 lb steam/hr May 8 2010 5500
4 Steam Output 5498.51000 lb steam/hr May 9 2010 5500
1 Flue Gas Flow Rate 118.52 mmscfh May 6 2010 116


### 4 Flue Gas Flow Rate 120.94 mmscfh May 9 2010 116
1 Pressure Drop Across FGD (if applicable) 2.59 in H20 May 6 2010 2.5
4 Pressure Drop Across FGD (if applicable) 2.44 in H20 May 9 2010 2.5


### 1 FGD Scrubber Liquor Flow Rate 100.78 gal/min May 6 2010 95
4 FGD Scrubber Liquor Flow Rate 100.61 gal/min May 9 2010 95
1 Unit Gross Electrical Output 871 Mwe May 6 2010 860


### 4 Unit Gross Electrical Output 870.4 Mwe May 9 2010 860
1 Unit Net Electric Generation 809 MWh May 6 2010 850
4 Unit Net Electric Generation 797.24 MWh May 9 2010 850

Run Name Value UOM Comments Target Value 

### 1 LOW NOX BURNERS 0 NA 0
2 LOW NOX BURNERS 0 NA 0


### 3 LOW NOX BURNERS 0 NA 0
4 LOW NOX BURNERS 0 NA 0
1 BAGHOUSE 8.2 in H2O 8.2


### 2 BAGHOUSE 0 in H2O 8.2
3 BAGHOUSE 0 in H2O 8.2
4 BAGHOUSE 0 in H2O 8.2



### Monday, February 14, 2011 Page 21 of 32

### ICR Walter Scott Jr. Energy Center 4

Process Lab Run Data 1 ACTIVATED CARBON ADSORPTION 1.1 lb/mmscf 1.2


### 2 ACTIVATED CARBON ADSORPTION 0 lb/mmscf 1.2
3 ACTIVATED CARBON ADSORPTION 0 lb/mmscf 1.2
4 ACTIVATED CARBON ADSORPTION 0 lb/mmscf 1.2


### 1 DRY SCRUBBER 101 gal/min 95
2 DRY SCRUBBER 97.46 gal/min 95
3 DRY SCRUBBER 104.36 gal/min 95


### 4 DRY SCRUBBER 100.61 gal/min 95
1 DRY SCRUBBER 175.7 Deg F 170
2 DRY SCRUBBER 173.49 Deg F 170


### 3 DRY SCRUBBER 174.66 Deg F 170
4 DRY SCRUBBER 174.96 Deg F 170

Run Name Value UOM Comments 

### 1 Fuel Higher Heating Value 8483 Btu/lb 2 Fuel Higher Heating Value 8517 Btu/lb 3 Fuel Higher Heating Value 8436 Btu/lb 4 Fuel Higher Heating Value 8501 Btu/lb 

### 1 Fuel Moisture 29.36 % 2 Fuel Moisture 29.23 % 3 Fuel Moisture 30.1 % 

### 4 Fuel Moisture 29.28 % 1 Fuel Mercury Content 0.078 mg/kg 2 Fuel Mercury Content 0.118 mg/kg 3 Fuel Mercury Content 0.109 mg/kg 

### 4 Fuel Mercury Content 0.1 mg/kg 1 Fuel Cadmium Content 0.09 mg/kg 2 Fuel Cadmium Content 0.1 mg/kg 

### 3 Fuel Cadmium Content 0.1 mg/kg 4 Fuel Cadmium Content 0.11 mg/kg 1 Fuel Nickel Content 5 mg/kg 2 Fuel Nickel Content 5 mg/kg 

### 3 Fuel Nickel Content 5 mg/kg 4 Fuel Nickel Content 5 mg/kg 1 Fuel Arsenic Content 1.9 mg/kg 

### 2 Fuel Arsenic Content 1.9 mg/kg 3 Fuel Arsenic Content 0.16 mg/kg 4 Fuel Arsenic Content 2.1 mg/kg 1 Fuel Chromium Content 6 mg/kg



### Monday, February 14, 2011 Page 22 of 32

### ICR Walter Scott Jr. Energy Center 4

2 Fuel Chromium Content 0.1 mg/kg 

### 3 Fuel Chromium Content 6 mg/kg 4 Fuel Chromium Content 6 mg/kg 1 Fuel Beryllium Content 0.3 mg/kg 2 Fuel Beryllium Content 0.3 mg/kg 

### 3 Fuel Beryllium Content 0.3 mg/kg 4 Fuel Beryllium Content 0.3 mg/kg 1 Fuel Lead Content 3.1 mg/kg 

### 2 Fuel Lead Content 3.2 mg/kg 3 Fuel Lead Content 3.2 mg/kg 4 Fuel Lead Content 3.3 mg/kg 1 Fuel Manganese Content 18 mg/kg 

### 2 Fuel Manganese Content 16 mg/kg 3 Fuel Manganese Content 9 mg/kg 4 Fuel Manganese Content 17 mg/kg 

### 1 Fuel Fluorine Content 32.2 ppm 2 Fuel Fluorine Content 32.1 ppm 3 Fuel Fluorine Content 26.6 ppm 4 Fuel Fluorine Content 33.2 ppm 

### 1 Fuel Chorine Content 6 ppm 2 Fuel Chorine Content 9 ppm 3 Fuel Chorine Content 9 ppm 

### 4 Fuel Chorine Content 10 ppm

Monday, February 14, 2011 Page 23 of 32

### ICR Walter Scott Jr. Energy Center 4

Sampling / Stack Data Results Detail



### Location Stack Exit - Method 23 Average Run Number 1 2 3 Test Date 4/6/2010 4/7/2010 4/8/2010 Run Start Time 8:57:00 AM 7:50:00 AM 7:43:00 AM Run Finish Time 5:32:00 PM 4:14:00 PM 6:06:00 PM Net Traversing Points 12 12 12 Net Run Time, minutes 480 480 480 Nozzle Diameter, inches 0.186 0.175 0.175 0.179 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1 1 1 1.000 Barometric Pressure, inches of Mercury 28.45 28.65 29 28.700 Average Orifice Meter Differential, inches H2O 2.16 1.69 1.76 1.870 Dry Gas Meter Volume Sampled, cubic feet 379.978 330.934 337.972 349.628 Average Dry Gas Meter Temperature, °F 77.50 60.83 66.92 68.417 Dry Gas Meter Volume Sampled, dscf 356.905 322.643 329.716 336.421 Total Moisture Liquid collected, g 1672 1424 1471 1,522.333 Volume of Water Vapor, standard cubic feet 78.70 67.03 69.24 71.657 Moisture Content of Stack Gas, % 18.07 17.20 17.36 17.543 Moisture Saturation at Stack Gas Temperature, % 74.15 66.55 69.35 70.017 Dry Mole Fraction 0.8193 0.828 0.8264 0.825 Carbon Dioxide, % 13.6 13.5 13.4 13.500 Oxygen, % 5.9 6.1 6.4 6.133 Carbon Monoxide & Nitrogen, % 80.5 80.4 80.2 80.367 Fuel Factor 1.10 1.10 1.08 Dry Molecular Weight, lb/lb-Mole 30.41 30.40 30.40 30.403 Wet Molecular weight, lb/lb-Mole 28.17 28.27 28.25 28.230 Flue Gas Static Pressure, inches of H2O -1.6 -1.6 -1.6 -1.600 Absolute Flue Gas Pressure, inches of Mercury 28.33 28.53 28.88 28.580 Average Stack Gas Temperature, °F 194.75 190.00 192.50 192.417 Average Velocity Head, inches of H2O 2.4537780906 33862.354463146

19707 2.440850612

98594 2.416
Average Stack Gas Velocity, feet/second 101.89 98.92 100.33 100.380 Stack Cross-Sectional Area, square feet 476.452 476.452 476.452 476.452 Dry Volumetric Flow Rate, dry scfm 1,822,167.6 1,813,617.1 1,851,315.91,829,033.5 33 Actual Wet Volumetric Flue Gas Flow Rate, acfm 2,912,741.7 2,827,837.9 2,868,145.72,869,575.1 00 Percent Isokinetic of Sampling Rate, % 103.0 105.7 105.8 104.833 Percent Excess Air, % 38.4 40.3 43.3 40.667 F-Factor, dscfm/MMBtu @ %O2 9820 9820 9820 9,820.000 Round Duct Diameter, inches 295.56 295.56 295.56 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw Fc 1840 1840 1840 1,840.000



### Monday, February 14, 2011 Page 24 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 25A Average Run Number 1 2 3 Test Date 4/7/2010 4/7/2010 4/7/2010 Run Start Time 8:20:00 AM10:43:00 AM 1:02:00 PM Run Finish Time 10:20:00 AM12:43:00 PM 3:02:00 PM Carbon Dioxide, % 13.5 13.7 13.6 13.600 Oxygen, % 6.1 6.1 6.1 6.100 Fuel Factor 1.1 1.08 1.09 Dry Volumetric Flow Rate, dry scfm 1846249.1 1846249.1 1880872.91,857,790.3 67 F-Factor, dscfm/MMBtu @ %O2 9820 9820 9820 9,820.000 Moisture, % 15.75 15.75 15.44 15.647 Analyzer Make Ratfisch Ratfisch Ratfisch Analyzer Model RS55 RS55 RS55 Analyzer Serial Number E1 E1 E1 Operating Range 100 100 100 100.000 Operating Units ppm ppm ppm No. Readings/Avg. 30 30 30 30.000 Calibration Set 0 0 0 0.000 Calibration Pre Zero Cylinder ID Nitrogen Nitrogen Nitrogen Calibration Pre Zero Cylinder Instrument Response -0.29 -0.26 -0.39 -0.313 Calibration Pre Zero Cylinder Bias 0.01 0.04 -0.09 -0.013 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM024752ALM024752 ALM024752 Calibration Pre High Cylinder Instrument Response 34.17 35.25 34.42 34.613 Calibration Pre High Cylinder Bias -0.03 1.05 0.22 0.413 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Nitrogen Nitrogen Nitrogen Calibration Post Zero Cylinder Instrument Response -0.26 -0.39 -0.25 -0.300 Calibration Post Zero Cylinder Bias 0.04 -0.09 0.05 0.000 Calibration Post Zero Cylinder Drift 0.03 0.13 0.14 0.100 Calibration Post High Cylinder ID ALM024752ALM024752 ALM024752 Calibration Post High Cylinder Instrument Response 35.25 34.42 35.23 34.967 Calibration Post High Cylinder Bias 1.1 0.22 1.03 0.783 Calibration Post High Cylinder Drift 1.1 0.83 0.81 0.913 Cavg 0.05 -0.11 -0.25 -0.103 Cavg Units ppmvw ppmvw ppmvw Cgas 0.3852 0 0 0.128 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw Fc 1800 1800 1800 1,800.000 Cgasw 0.3244890667 4289 0 0 0.108
Cgasw Units ppmvw ppmvw ppmvw



### Monday, February 14, 2011 Page 25 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 26A 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



### Monday, February 14, 2011 Page 26 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 29 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



### Monday, February 14, 2011 Page 27 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 3A CO2 Average Run Number 1 2 3 Test Date 4/6/2010 4/7/2010 4/8/2010 Run Start Time 8:57:00 AM 7:50:00 AM 8:01:00 AM Run Finish Time 5:32:00 PM 5:34:00 PM 6:08:00 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 Horiba Horiba Horiba Analyzer Model Pir 2000 Pir 2000 Pir 2000 Analyzer Serial Number 411039 411039 411039411,039.000 Operating Range 20.16 20.16 20.16 20.160 Operating Units % % % No. Readings/Avg. 30 30 30 30.000 Calibration Set 0 20 20 13.333 Calibration Pre Zero Cylinder ID Nitrogen Nitrogen Calibration Pre Zero Cylinder Instrument Response -0.02 -0.07 0.03 -0.020 Calibration Pre Zero Cylinder Bias 0.28 -0.25 0.25 0.093 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM008428 CO2ALM008428

CO2 Calibration Pre High Cylinder Instrument Response 10.69 10.63 10.7 10.673 Calibration Pre High Cylinder Bias -23.51 9.9 0.05 -4.520 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Nitrogen Nitrogen Calibration Post Zero Cylinder Instrument Response 0.04 0.03 0.1 0.057 Calibration Post Zero Cylinder Bias 0.34 -0.14 0.6 0.267 Calibration Post Zero Cylinder Drift 0.06 0.48 0.35 0.297 Calibration Post High Cylinder ID ALM008428 CO2ALM008428

CO2 Calibration Post High Cylinder Instrument Response 10.46 10.71 10.62 10.597 Calibration Post High Cylinder Bias -23.74 10.29 -0.35 -4.600 Calibration Post High Cylinder Drift 10.420.389999999 999999 0.4 3.737
Cavg 13.7 13.7 13.4 13.600 Cavg Units %vd %vd %vd Cgas 13.4761 13.2154 13.346 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



### Monday, February 14, 2011 Page 28 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 3A CO2 3 Average Run Number 4 Test Date 4/9/2010 Run Start Time 11:24:00 AM Run Finish Time 3:10:00 PM Carbon Dioxide, % 0 0.000 Oxygen, % 0 0.000 Fuel Factor 0 Dry Volumetric Flow Rate, dry scfm 0 0.000 F-Factor, dscfm/MMBtu @ %O2 0 0.000 Moisture, % 0 0.000 Analyzer Make Horiba Analyzer Model Pir 2000 Analyzer Serial Number 411039 411,039.000 Operating Range 20.16 20.160 Operating Units % No. Readings/Avg. 30 30.000 Calibration Set 20 20.000 Calibration Pre Zero Cylinder ID Nitrogen Calibration Pre Zero Cylinder Instrument Response 0.05 0.050 Calibration Pre Zero Cylinder Bias 0.35 0.350 Calibration Pre Zero Cylinder Drift 0 0.000 Calibration Pre High Cylinder ID ALM008428 CO2 Calibration Pre High Cylinder Instrument Response 10.6 10.600 Calibration Pre High Cylinder Bias -0.45 -0.450 Calibration Pre High Cylinder Drift 0 0.000 Calibration Post Zero Cylinder ID Nitrogen Calibration Post Zero Cylinder Instrument Response 0.1 0.100 Calibration Post Zero Cylinder Bias 0.6 0.600 Calibration Post Zero Cylinder Drift 0.25 0.250 Calibration Post High Cylinder ID ALM008428 CO2 Calibration Post High Cylinder Instrument Response 10.62 10.620 Calibration Post High Cylinder Bias -0.35 -0.350 Calibration Post High Cylinder Drift 0.1 0.100 Cavg 13.4 13.400 Cavg Units %vd Cgas 13.2807 13.281 Cgas Units %vd Fuel Type Fw 0 0.000 Fc 0 0.000 Cgasw 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 29 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 3A O2 Average Run Number 1 2 3 Test Date 4/6/2010 4/7/2010 4/8/2010 Run Start Time 8:57:00 AM 7:50:00 AM 8:01:00 AM Run Finish Time 5:32:00 PM 5:34:00 PM 6:08:00 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 Horiba Horiba Horiba Analyzer Model MPA-500 MPA-510 MPA-510 Analyzer Serial Number 42108510024210851002 42108510024,210,851,0 02.000 Operating Range 21 21 21 21.000 Operating Units % % % No. Readings/Avg. 30 30 30 30.000 Calibration Set 10 10 10 10.000 Calibration Pre Zero Cylinder ID Nitrogen Nitrogen Nitrogen Calibration Pre Zero Cylinder Instrument Response 0.06 0.09 0.03 0.060 Calibration Pre Zero Cylinder Bias 0 0.14 -0.14 0.000 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM008428 O2ALM008428

O2ALM008428

O2 Calibration Pre High Cylinder Instrument Response 8.54 8.54 8.53 8.537 Calibration Pre High Cylinder Bias -0.05 -0.05 -0.1 -0.067 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Nitrogen Nitrogen Nitrogen Calibration Post Zero Cylinder Instrument Response 0.03 0.04 0.06 0.043 Calibration Post Zero Cylinder Bias -0.14 -0.1 0 -0.080 Calibration Post Zero Cylinder Drift 0.14 0.24 0.14 0.173 Calibration Post High Cylinder ID ALM008428 O2ALM008428

O2ALM008428

O2 Calibration Post High Cylinder Instrument Response 8.39 8.41 8.37 8.390 Calibration Post High Cylinder Bias -0.76 -0.67 -0.86 -0.763 Calibration Post High Cylinder Drift 0.76 0.62 0.76 0.713 Cavg 5.9 6.1 6.4 6.133 Cavg Units %vd %vd %vd Cgas 5.9037 6.0924 6.4193 6.138 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



### Monday, February 14, 2011 Page 30 of 32

### ICR Walter Scott Jr. Energy Center 4

Location Stack Exit - Method 3A O2 3 Average Run Number 4 Test Date 4/9/2010 Run Start Time 11:24:00 AM Run Finish Time 3:10:00 PM Carbon Dioxide, % 0 0.000 Oxygen, % 0 0.000 Fuel Factor 0 Dry Volumetric Flow Rate, dry scfm 0 0.000 F-Factor, dscfm/MMBtu @ %O2 0 0.000 Moisture, % 0 0.000 Analyzer Make Horiba Analyzer Model MPA-510 Analyzer Serial Number 4210851002 4,210,851,0 02.000 Operating Range 21 21.000 Operating Units % No. Readings/Avg. 30 30.000 Calibration Set 10 10.000 Calibration Pre Zero Cylinder ID Nitrogen Calibration Pre Zero Cylinder Instrument Response 0.03 0.030 Calibration Pre Zero Cylinder Bias 0.33 0.330 Calibration Pre Zero Cylinder Drift 0 0.000 Calibration Pre High Cylinder ID ALM008428 O2 Calibration Pre High Cylinder Instrument Response 8.21 8.210 Calibration Pre High Cylinder Bias -25.99 -25.990 Calibration Pre High Cylinder Drift 0 0.000 Calibration Post Zero Cylinder ID Nitrogen Calibration Post Zero Cylinder Instrument Response 0.04 0.040 Calibration Post Zero Cylinder Bias 0.34 0.340 Calibration Post Zero Cylinder Drift 0.01 0.010 Calibration Post High Cylinder ID ALM008428 O2 Calibration Post High Cylinder Instrument Response 8.19 8.190 Calibration Post High Cylinder Bias -26.01 -26.010 Calibration Post High Cylinder Drift 2.0000000000 0031E-02 0.020
Cavg 6.1 6.100 Cavg Units %vd Cgas 6.3064 6.306 Cgas Units %vd Fuel Type Fw 0 0.000 Fc 0 0.000 Cgasw 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 31 of 32

### ICR Walter Scott Jr. Energy Center 4

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 Stack Exit Stack Exit Stack Exit Moisture Content of Stack Gas, % 4/8/2010 4/8/2010 4/9/2010 Moisture Saturation at Stack Gas Temperature, % OTM - 27/28OTM - 27/28OTM - 27/28 Dry Mole Fraction 1 2 3 2.000 Carbon Dioxide, % 7:28:00 AM 2:09:00 PM11:13:00 AM Oxygen, % 12:34:00 PM 6:04:00 PM 3:14:00 PM Carbon Monoxide & Nitrogen, % 12 12 12 12.000 Fuel Factor 242.74 233.95 234.13 Dry Molecular Weight, lb/lb-Mole 0.125 0.125 0.125 0.125 Wet Molecular weight, lb/lb-Mole 0.84 0.84 0.84 0.840 Flue Gas Static Pressure, inches of H2O 1.007 1.007 1.007 1.007 Absolute Flue Gas Pressure, inches of Mercury 29 29 28.97 28.990 Average Stack Gas Temperature, °F 0.26 0.26 0.26 0.260 Average Velocity Head, inches of H2O 80.355 75.273 75.185 76.938 Average Stack Gas Velocity, feet/second 63.67 70.25 75.92 69.947 Stack Cross-Sectional Area, square feet 15.06 14.55 15.65 15.087 Dry Volumetric Flow Rate, dry scfm 67.41 73.38 74.75 71.847 Actual Wet Volumetric Flue Gas Flow Rate, acfm 0.8494 0.8545 0.8435 0.849 Percent Isokinetic of Sampling Rate, % 13.2 13.2 13.3 13.233 Percent Excess Air, % 6.4 6.4 6.3 6.367 F-Factor, dscfm/MMBtu @ %O2 80.4 80.4 80.4 80.400 Round Duct Diameter, inches 79.130 73.206 72.272 Rectangular Duct Width, inches 298 265 285 Rectangular Duct Length, inches 14.03 12.47 13.41 Fw 30.37 30.37 30.38 30.373 Fc 1.10 1.10 1.10 1.100



### Monday, February 14, 2011 Page 32 of 32