### Name: James Reilly

Title: Plant Manager Company: Arizona Public Service - Cholla Power Sign Date: 8/20/2010 Name: Rick Stallings Title: Project Manager, Field Lead Company:TRC Environmental Sign Date: 8/20/2010 Permitted Facility Representative / Date Testing Company Representative / Date Final Test Report for

/ / Based on information and belief formed after reasonable inquiry, I certify that the statements and information in this test report are true, accurate, and complete. I have reviewed all testing details and results in this test report and hereby certify that the test report is authentic and accurate.

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Facility Information: Cholla Power Plant 4801 Cholla Lake Road Mail Station 4458 Joseph City Az86032 Contact:Kimber Belknap Phone:928 288-1470 Fax: 928 288-1180 Email: kimber.belknap@aps.com Testing Company: TRC Environmental Inc. 4221-A Balloon Park Road NE

Albuquerque NM87109 Contact:Richard Stallings Phone:505 314-7072 Fax: 505 761-0208 Email:rstallings@trcsolutions.com

Air Permit Number: 33500 Permitted Source ID/Name: Cholla Unit 4 4 Permitted Maximum Process Rate: not applicable Max. Normal Operation Process Rate: 380 to 425 gross megawatts Target Process Test Rate > 380 gross megawatts

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: Cholla Unit 4 is a tangentially-fired, coal-burning electrical generation unit. The unit has a low NOx burner system with COFA and SOFA, fabric filter baghouse for particulate control and lime slurry spray tower absorber for sulfur dioxide control. Industry/SCC/NAIS221112

Sampling Location Information:

Test Parameter Information: AFS #:04017Z2369 FRS #:110017206192

SCC / Description10100212 External Combustion Boilers - Electric Generation - Bituminous/Subbituminous Coal - Pulverized Coal: Dry Bottom (Tangential) (Bituminous Coal)

The following state and federal regulations that apply to the proposed testing:

Location Round

Duct Diam. Distance from upstream dist. Distance from

downstream dist. Number of

Traverse Ports Equiv. Diam Min.Travers Points Rect. Duct Length /Width U4 Stack 278.5 1236 4164 4 0 24 0 0

Target Parameter Test Method Number of

Test RunsTest Run

DurationSample

Points Comments LocationHydrogen Chloride Method 26A 3 180 0 The Method Detection Limit is 0.1 ug/ml, specified in Method 26A, section 12.1 U4 Stack Regulation Description Compound Limit Unit

none 0



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The following describes any modifications and/or deviations to the applicable test methods. If alternative methods were requested, see the attachments for documentation of request AND approval, including dates. CTM-033 was modified to use three impingers with 2 Normal NaOH solution and a 60 minute run time, as described in the attached ICR TEST FAQ 025. The first impinger pH was checked at each port change and replaced with a fresh impinger when the pH was less than 12.

Hydrogen Fluoride Method 26A 3 180 0 The stack gas is saturated with moisture, so the impingers were not weight to determine wator vapor. The Method Detection Limit is 0.1 ug/ml, specified in Method 26A, section 12.1 U4 Stack

Beryllium Method 29 3 240 0 U4 Stack Arsenic Method 29 3 240 0 U4 Stack Selenium Method 29 3 240 0 The Method Detection Limit for all metals is specified in 40 CFR 136, appendix B. U4 Stack

Cadmium Method 29 3 240 0 U4 Stack Chromium Method 29 3 240 0 U4 Stack Cobalt Method 29 3 240 0 U4 Stack Lead Method 29 3 240 0 U4 Stack Manganese Method 29 3 240 0 U4 Stack Nickel Method 29 3 240 0 The stack gas is saturated with moisture, so the impingers were not weighed to determine wator vapor. U4 Stack

Antimony Method 29 3 240 0 U4 Stack Organic Condensible

Particulate Method 5/OTM-28 3 240 0 Hexane replaced methylene chloride for extraction U4 Stack

Inorganic (Aqueous)

Condensible Part. Method 5/OTM-28 3 240 0 Hexane replaced methylene chloride for extraction U4 Stack

Filterable Particulate Method 5/OTM-28 3 240 0 U4 Stack Total Particulate Method 5/OTM-28 3 240 0 U4 Stack



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Sampling / Stack Data Results Summary 

### LocationU4 Stack - Method 26A Average Run Number R1 R2 R3 Test Date 4/29/2010 4/29/2010 4/29/2010 Run Start Time 4/29/2010 8:40:00 AM4/29/2010

12:45:00 PM 4/29/2010 5:20:00 PM

Run Finish Time 4/29/2010 12:18:00 PM4/29/2010

5:00:00 PM 4/29/2010

8:57:00 PM Net Run Time, minutes 180 180 180 Dry Gas Meter Volume Sampled, dscf 132.134 131.087 130.844 131.355 Moisture Content of Stack Gas, % 14.24 14.10 14.27 14.203 Moisture Saturation at Stack Gas Temperature, % 14.24 14.10 14.27 14.203 Carbon Dioxide, % 14.65 14.62 13.97 14.413 Oxygen, % 5.36 5.36 5.41 5.377 Average Stack Gas Temperature, °F 120.17 119.83 120.25 120.083 Dry Volumetric Flow Rate, dry scfm 886,637.1 879,579.0 882,346.8882,854.300 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,399,318.51,385,104.5 1,393,226.81,392,549.93 3 Percent Isokinetic of Sampling Rate, % 100.3 100.3 99.8 100.133 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Fw 10640 10640 10640 10,640.000 Fc 1800 1800 1800 1,800.000



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LocationU4 Stack - Method 29 Average Run Number R1 R2 R3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 4/27/2010 9:19:00 AM4/28/2010

9:38:00 AM 4/29/2010 2:11:00 PM

Run Finish Time 4/27/2010 2:31:00 PM4/28/2010

4:28:00 PM 4/29/2010

6:57:00 PM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 178.382 175.767 169.465 174.538 Moisture Content of Stack Gas, % 14.86 14.60 13.80 14.420 Moisture Saturation at Stack Gas Temperature, % 14.86 14.60 13.80 14.420 Carbon Dioxide, % 16.3 15.22 14.25 15.257 Oxygen, % 5.19 5.26 5.39 5.280 Average Stack Gas Temperature, °F 122.25 121.46 119.05 120.920 Dry Volumetric Flow Rate, dry scfm 875,518.9 879,045.6 877,685.2877,416.567 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,376,982.21,382,058.6 1,375,459.31,378,166.70 0 Percent Isokinetic of Sampling Rate, % 102.9 101.0 99.0 100.967 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Fw 10640 10640 10640 10,640.000 Fc 1800 1800 1800 1,800.000



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LocationU4 Stack - Method 5/OTM-28 Average Run Number R1 R2 R3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 4/27/2010 9:19:00 AM4/28/2010

9:38:00 AM 4/29/2010 8:40:00 AM

Run Finish Time 4/27/2010 2:31:00 PM4/28/2010

11:28:00 AM 4/29/2010 1:32:00 PM

Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 174.519 172.363 172.081 172.988 Moisture Content of Stack Gas, % 15.05 15.16 15.19 15.133 Moisture Saturation at Stack Gas Temperature, % 14.67 14.42 13.97 14.353 Carbon Dioxide, % 16.3 15.22 14.67 15.397 Oxygen, % 5.19 5.26 5.35 5.267 Average Stack Gas Temperature, °F 121.77 121.00 119.50 120.757 Dry Volumetric Flow Rate, dry scfm 879,653.6 882,405.3 883,511.6881,856.833 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,379,266.61,383,327.7 1,388,404.21,383,666.16 7 Percent Isokinetic of Sampling Rate, % 101.8 100.2 99.9 100.633 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Fw 10640 10640 10640 10,640.000 Fc 1800 1800 1800 1,800.000



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Emissions Summary 

### Location: U4 Stack - Method 26A Compound: Hydrogen Chloride Average RunNumber R1 R2 R3 Mass_mg 0.381 0.383 0.393 0.386 lb/mmBtuO2 8.36E-05 8.47E-05 8.74E-05 0.000 

### Compound: Hydrogen Fluoride Average RunNumber R1 R2 R3 Mass_mg 0.39 0.392 0.403 0.395 lb/mmBtuO2 8.56E-05 8.67E-05 8.96E-05 0.000



### Location: U4 Stack - Method 29 Compound: Antimony Average RunNumber R1 R2 R3 Mass_mg 0.000346 0.000172 0.000218 0.000 lb/mmBtuO2 5.56E-08 2.82E-08 3.74E-08 0.000 

### Compound: Arsenic Average RunNumber R1 R2 R3 Mass_mg 0.00146 0.00133 0.00088 0.001 lb/mmBtuO2 2.35E-07 2.18E-07 1.51E-07 0.000 

### Compound: Beryllium Average RunNumber R1 R2 R3 Mass_mg 0.000029 0.000073 0.00007 0.000 lb/mmBtuO2 4.66E-09 1.20E-08 1.20E-08 0.000 

### Compound: Cadmium Average RunNumber R1 R2 R3 Mass_mg 0.000161 0.000054 0.000111 0.000 lb/mmBtuO2 2.59E-08 8.85E-09 1.90E-08 0.000 

### Compound: Chromium Average RunNumber R1 R2 R3 Mass_mg 0.00424 0.00164 0.00344 0.003 lb/mmBtuO2 6.82E-07 2.69E-07 5.90E-07 0.000 

### Compound: Cobalt Average RunNumber R1 R2 R3 Mass_mg 0.0002646 0.0001946 0.000219 0.000 lb/mmBtuO2 4.25E-08 3.19E-08 3.75E-08 0.000



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Process Run Data Compound: Lead Average RunNumber R1 R2 R3 Mass_mg 0.00195 0.0009 0.00051 0.001 lb/mmBtuO2 3.14E-07 1.48E-07 8.74E-08 0.000 

### Compound: Manganese Average RunNumber R1 R2 R3 Mass_mg 0.0059 0.0061 0.0043 0.005 lb/mmBtuO2 9.49E-07 1.00E-06 7.37E-07 0.000 

### Compound: Nickel Average RunNumber R1 R2 R3 Mass_mg 0.00505 0.001615 0.000295 0.002 lb/mmBtuO2 8.12E-07 2.65E-07 5.06E-08 0.000 

### Compound: Selenium Average RunNumber R1 R2 R3 Mass_mg 0.08901 0.10381 0.0459 0.080 lb/mmBtuO2 1.43E-05 1.70E-05 7.87E-06 0.000



### Location: U4 Stack - Method 5/OTM-28 Compound: Filterable Particulate Average RunNumber R1 R2 R3 Mass_mg 30.6 18.4 16.9 21.967 lb/mmBtuO2 5.03E-03 3.08E-03 2.85E-03 0.004 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber R1 R2 R3 Mass_mg 27.6 22.9 9.2 19.900 lb/mmBtuO2 4.54E-03 3.83E-03 1.55E-03 0.003 

### Compound: Organic Condensible Particulate Average RunNumber R1 R2 R3 Mass_mg 3.1 2.5 2.3 2.633 lb/mmBtuO2 5.10E-04 4.18E-04 3.87E-04 0.000 

### Compound: Total Particulate Average RunNumber R1 R2 R3 Mass_mg 61.3 43.8 28.4 44.500 lb/mmBtuO2 1.01E-02 7.32E-03 4.78E-03 0.007



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Process Run Data



### Run Name Value UOM Comments Target Value 1 Heat Input 4112.6 Million Btus/million BTU using CO2M5B R1, M28 R1, and M29 R1 4/207/10 0919- 1431 4000

2 Heat Input 3885.4 Million Btus/million BTU using CO2M5B R2, M28 R2, M29 R2, 4/28/10 0938-1628 4000

3 Heat Input 4018.8 Million Btus/million BTU using CO2M5B R3, M28 R3 4/29/10 0840-1332 4000



### 4 Heat Input 4121.7 Million Btus/million BTU using CO2M29 R3 4/29/10 1411-1857 4000

6 Heat Input 4028.5 Million Btus/million BTU using CO2M26A R1 4/29/10 0840-1218 4000



### 7 Heat Input 4075.2 Million Btus/million BTU using CO2M26A R2 4/29/10 1245-1700 4000

8 Heat Input 4169.1 Million Btus/million BTU using CO2M26A R3 4/29/10 1720-2057 4000



### 1 Steam output 2641.21000 lbs/hour 2800 2 Steam output 2526.31000 lbs/hour 2800 3 Steam output 26521000 lbs/hour 2800 

### 4 Steam output 2655.81000 lbs/hour 2800 6 Steam output 2649.81000 lbs/hour 2800 7 Steam output 2659.61000 lbs/hour 2800 

### 8 Steam output 2636.51000 lbs/hour 2800 1 fabric filter pressure drop 5.9 inches H2O 8 2 fabric filter pressure drop 5.5 inches H2O 8 

### 3 fabric filter pressure drop 5.8 inches H2O 8 4 fabric filter pressure drop 5.7 inches H2O 8 6 fabric filter pressure drop 5.8 inches H2O 8 

### 7 fabric filter pressure drop 5.7 inches H2O 8 8 fabric filter pressure drop 5.7 inches H2O 8 

### 1 scrubber liquor pH 5.9 pH 6 2 scrubber liquor pH 5.9 pH 6 3 scrubber liquor pH 5.8 pH 6 

### 4 scrubber liquor pH 5.8 pH 6 6 scrubber liquor pH 5.8 pH 6 7 scrubber liquor pH 5.8 pH 6



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8 scrubber liquor pH 5.7 pH 6 

### 1 scrubber liquor flow rate 50923 gpm 75000 2 scrubber liquor flow rate 50921 gpm 75000 3 scrubber liquor flow rate 50920 gpm 75000 

### 4 scrubber liquor flow rate 50919 gpm 75000 6 scrubber liquor flow rate 50919 gpm 75000 7 scrubber liquor flow rate 50921 gpm 75000 

### 8 scrubber liquor flow rate 50920 gpm 75000 1 lime slurry sorbent injection rate 76.6 gpm 75 2 lime slurry sorbent injection rate 72.4 gpm 75 

### 3 lime slurry sorbent injection rate 72.2 gpm 75 4 lime slurry sorbent injection rate 72.3 gpm 75 6 lime slurry sorbent injection rate 72.1 gpm 75 

### 7 lime slurry sorbent injection rate 72.2 gpm 75 8 lime slurry sorbent injection rate 73.4 gpm 75 1 standard temperature 68 Deg F 68 

### 2 standard temperature 68 Deg F 68 3 standard temperature 68 Deg F 68 4 standard temperature 68 Deg F 68 

### 6 standard temperature 68 Deg F 68 7 standard temperature 68 Deg F 68 

### 8 standard temperature 68 Deg F 68 1 standard pressure 29.92 " Hg 29.92 2 standard pressure 29.92 " Hg 29.92 

### 3 standard pressure 29.92 " Hg 29.92 4 standard pressure 29.92 " Hg 29.92 6 standard pressure 29.92 " Hg 29.92 

### 7 standard pressure 29.92 " Hg 29.92 8 standard pressure 29.92 " Hg 29.92 1 Gross electrical output 411.6 mwe 410 

### 2 Gross electrical output 397.2 mwe 410 3 Gross electrical output 412 mwe 410 4 Gross electrical output 412 mwe 410 

### 6 Gross electrical output 412 mwe 410 7 Gross electrical output 411.9 mwe 410 8 Gross electrical output 412 mwe 410



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APCD Run Data 1 Net electrical output 380.7 nwe 370 

### 2 Net electrical output 366.7 nwe 370 3 Net electrical output 380.5 nwe 370 4 Net electrical output 381 nwe 370 

### 6 Net electrical output 380.5 nwe 370 7 Net electrical output 380.6 nwe 370 8 Net electrical output 380.5 nwe 370 

### 1 Coal feed rate 199.9 tons/hour 200 2 Coal feed rate 197.6 tons/hour 200 3 Coal feed rate 204.9 tons/hour 200 

### 4 Coal feed rate 204.9 tons/hour 200 6 Coal feed rate 205 tons/hour 200 7 Coal feed rate 204.9 tons/hour 200 

### 8 Coal feed rate 204.9 tons/hour 200

Run Name Value UOM Comments Target Value 1 LOW NOX BURNERS 0.16NOx lb/mbtu 0.19 

### 2 LOW NOX BURNERS 0.17NOx lb/mbtu 0.19 3 LOW NOX BURNERS 0.17NOx lb/mbtu 0.19 4 LOW NOX BURNERS 0.17NOx lb/mbtu 0.19 

### 5 LOW NOX BURNERS 0.17NOx lb/mbtu 0.19 6 LOW NOX BURNERS 0.17NOx lb/mbtu 0.19 7 LOW NOX BURNERS 0.17NOx lb/mbtu 0.19 

### 1 OVERFIRE AIR 0.16NOx lb/mbtu 0.19 2 OVERFIRE AIR 0.17NOx lb/mbtu 0.19 3 OVERFIRE AIR 0.17NOx lb/mbtu 0.19 

### 4 OVERFIRE AIR 0.17NOx lb/mbtu 0.19 5 OVERFIRE AIR 0.17NOx lb/mbtu 0.19 6 OVERFIRE AIR 0.17NOx lb/mbtu 0.19 

### 7 OVERFIRE AIR 0.17NOx lb/mbtu 0.19 1 FABRIC FILTER 5.9 " H20 8 2 FABRIC FILTER 5.5 " H20 8 

### 3 FABRIC FILTER 5.8 " H20 8 4 FABRIC FILTER 5.7 " H20 8 5 FABRIC FILTER 5.7 " H20 8



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Process Lab Run Data 6 FABRIC FILTER 5.8 " H20 8 

### 7 FABRIC FILTER 5.7 " H20 8 1 SPRAY TOWER 0.14SO2 lb/mbtu 0.15 2 SPRAY TOWER 0.14SO2 lb/mbtu 0.15 

### 3 SPRAY TOWER 0.14SO2 lb/mbtu 0.15 4 SPRAY TOWER 0.14SO2 lb/mbtu 0.15 5 SPRAY TOWER 0.14SO2 lb/mbtu 0.15 

### 6 SPRAY TOWER 0.14SO2 lb/mbtu 0.15 7 SPRAY TOWER 0.15 SO2 lb/mbtu 0.15 1 FABRIC FILTER 2 Opacity % 3 

### 2 FABRIC FILTER 2 Opacity % 3 3 FABRIC FILTER 2 Opacity % 3 4 FABRIC FILTER 2 Opacity % 3 

### 5 FABRIC FILTER 2 Opacity % 3 6 FABRIC FILTER 2 Opacity % 3 7 FABRIC FILTER 2 Opacity % 3

Run Name ValueUOM Comments 

### 1 none 0

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Sampling / Stack Data Results Detail 

### LocationU4 Stack - Method 26A Average Run Number R1 R2 R3 Test Date 4/29/2010 4/29/2010 4/29/2010 Run Start Time 4/29/2010 8:40:00 AM 4/29/2010

12:45:00 PM 4/29/2010

5:20:00 PM Run Finish Time 4/29/2010 12:18:00 PM 4/29/2010

5:00:00 PM 4/29/2010

8:57:00 PM Net Traversing Points 24 24 24 Net Run Time, minutes 180 180 180 Nozzle Diameter, inches 0.253 0.253 0.253 0.253 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0099 1.0099 1.0099 1.010 Barometric Pressure, inches of Mercury 24.3 24.3 24.3 24.300 Average Orifice Meter Differential, inches H2O 2.18 2.14 2.14 2.153 Dry Gas Meter Volume Sampled, cubic feet 161.331 160.460 158.812 160.201 Average Dry Gas Meter Temperature, °F 72.25 73.54 69.04 71.610 Dry Gas Meter Volume Sampled, dscf 132.134 131.087 130.844 131.355 Total Moisture Liquid collected, g 466.2 457.2 462.8 462.067 Volume of Water Vapor, standard cubic feet 21.94 21.52 21.78 21.747 Moisture Content of Stack Gas, % 14.24 14.10 14.27 14.203 Moisture Saturation at Stack Gas Temperature, % 14.24 14.10 14.27 14.203 Dry Mole Fraction 0.8576 0.859 0.8573 0.858 Carbon Dioxide, % 14.65 14.62 13.97 14.413 Oxygen, % 5.36 5.36 5.41 5.377 Carbon Monoxide & Nitrogen, % 79.99 80.02 80.62 80.210 Fuel Factor 1.06 1.06 1.11 Dry Molecular Weight, lb/lb-Mole 30.56 30.55 30.45 30.520 Wet Molecular weight, lb/lb-Mole 28.77 28.78 28.67 28.740 Flue Gas Static Pressure, inches of H2O -0.18 -0.18 -0.18 -0.180 Absolute Flue Gas Pressure, inches of Mercury 24.29 24.29 24.29 24.290 Average Stack Gas Temperature, °F 120.17 119.83 120.25 120.083 Average Velocity Head, inches of H2O 0.7099947746 262960.696092462

1524750.701251260

834392 0.702 Average Stack Gas Velocity, feet/second 55.13 54.57 54.89 54.863 Stack Cross-Sectional Area, square feet 423.036 423.036 423.036 423.036 Dry Volumetric Flow Rate, dry scfm 886,637.1 879,579.0 882,346.8882,854.300 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,399,318.51,385,104.5 1,393,226.81,392,549.9 33 Percent Isokinetic of Sampling Rate, % 100.3 100.3 99.8 100.133 Percent Excess Air, % 34.0 34.0 34.1 34.033 F-Factor, dscfm/MMBtu @ %O2 9780 9780 97809,780.000 Round Duct Diameter, inches 278.5 278.5 278.5 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10640 10640 1064010,640.000 Fc 1800 1800 18001,800.000



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LocationU4 Stack - Method 29 Average Run Number R1 R2 R3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 4/27/2010 9:19:00 AM 4/28/2010

9:38:00 AM 4/29/2010

2:11:00 PM Run Finish Time 4/27/2010 2:31:00 PM 4/28/2010

4:28:00 PM 4/29/2010

6:57:00 PM Net Traversing Points 24 24 24 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.253 0.253 0.251 0.252 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0099 1.0099 0.99 1.003 Barometric Pressure, inches of Mercury 24.65 24.55 24.3 24.500 Average Orifice Meter Differential, inches H2O 2.15 2.17 1.97 2.097 Dry Gas Meter Volume Sampled, cubic feet 219.494 216.092 211.973 215.853 Average Dry Gas Meter Temperature, °F 84.02 81.40 74.19 79.870 Dry Gas Meter Volume Sampled, dscf 178.382 175.767 169.465 174.538 Total Moisture Liquid collected, g 661.6 638.5 576.5 625.533 Volume of Water Vapor, standard cubic feet 31.14 30.05 27.14 29.443 Moisture Content of Stack Gas, % 14.86 14.60 13.80 14.420 Moisture Saturation at Stack Gas Temperature, % 14.86 14.60 13.80 14.420 Dry Mole Fraction 0.8514 0.854 0.862 0.856 Carbon Dioxide, % 16.3 15.22 14.25 15.257 Oxygen, % 5.19 5.26 5.39 5.280 Carbon Monoxide & Nitrogen, % 78.51 79.52 80.36 79.463 Fuel Factor 0.96 1.03 1.09 Dry Molecular Weight, lb/lb-Mole 30.82 30.65 30.50 30.657 Wet Molecular weight, lb/lb-Mole 28.91 28.80 28.78 28.830 Flue Gas Static Pressure, inches of H2O -0.17 -0.18 -0.18 -0.177 Absolute Flue Gas Pressure, inches of Mercury 24.64 24.54 24.29 24.490 Average Stack Gas Temperature, °F 122.25 121.46 119.05 120.920 Average Velocity Head, inches of H2O 0.6981623441 866320.698875809

8240670.687464465

207935 0.695 Average Stack Gas Velocity, feet/second 54.25 54.45 54.19 54.297 Stack Cross-Sectional Area, square feet 423.036 423.036 423.036 423.036 Dry Volumetric Flow Rate, dry scfm 875,518.9 879,045.6 877,685.2877,416.567 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,376,982.21,382,058.6 1,375,459.31,378,166.7 00 Percent Isokinetic of Sampling Rate, % 102.9 101.0 99.0 100.967 Percent Excess Air, % 33.4 33.4 34.1 33.633 F-Factor, dscfm/MMBtu @ %O2 9780 9780 97809,780.000 Round Duct Diameter, inches 278.5 278.5 278.5 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10640 10640 1064010,640.000 Fc 1800 1800 18001,800.000



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LocationU4 Stack - Method 5/OTM-28 Average Run Number R1 R2 R3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 4/27/2010 9:19:00 AM 4/28/2010

9:38:00 AM 4/29/2010

8:40:00 AM Run Finish Time 4/27/2010 2:31:00 PM 4/28/2010

11:28:00 AM 4/29/2010

1:32:00 PM Net Traversing Points 24 24 24 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.251 0.251 0.251 0.251 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.99 0.99 0.99 0.990 Barometric Pressure, inches of Mercury 24.65 24.55 24.3 24.500 Average Orifice Meter Differential, inches H2O 2.04 2.05 2.02 2.037 Dry Gas Meter Volume Sampled, cubic feet 220.320 217.782 215.926 218.009 Average Dry Gas Meter Temperature, °F 86.98 85.25 75.96 82.730 Dry Gas Meter Volume Sampled, dscf 174.519 172.363 172.081 172.988 Total Moisture Liquid collected, g 656.9 654.5 654.9 655.433 Volume of Water Vapor, standard cubic feet 30.92 30.81 30.83 30.853 Moisture Content of Stack Gas, % 15.05 15.16 15.19 15.133 Moisture Saturation at Stack Gas Temperature, % 14.67 14.42 13.97 14.353 Dry Mole Fraction 0.8533 0.8558 0.8603 0.856 Carbon Dioxide, % 16.3 15.22 14.67 15.397 Oxygen, % 5.19 5.26 5.35 5.267 Carbon Monoxide & Nitrogen, % 78.51 79.52 79.98 79.337 Fuel Factor 0.96 1.03 1.06 Dry Molecular Weight, lb/lb-Mole 30.82 30.65 30.56 30.677 Wet Molecular weight, lb/lb-Mole 29.01 28.96 29.02 28.997 Flue Gas Static Pressure, inches of H2O -0.17 -0.18 -0.18 -0.177 Absolute Flue Gas Pressure, inches of Mercury 24.64 24.54 24.29 24.490 Average Stack Gas Temperature, °F 121.77 121.00 119.50 120.757 Average Velocity Head, inches of H2O 0.7035541083 536960.704575657

237960.705684220

26464 0.705 Average Stack Gas Velocity, feet/second 54.34 54.50 54.70 54.513 Stack Cross-Sectional Area, square feet 423.036 423.036 423.036 423.036 Dry Volumetric Flow Rate, dry scfm 879,653.6 882,405.3 883,511.6881,856.833 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,379,266.61,383,327.7 1,388,404.21,383,666.1 67 Percent Isokinetic of Sampling Rate, % 101.8 100.2 99.9 100.633 Percent Excess Air, % 33.4 33.4 33.9 33.567 F-Factor, dscfm/MMBtu @ %O2 9780 9780 97809,780.000 Round Duct Diameter, inches 278.5 278.5 278.5 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10640 10640 1064010,640.000 Fc 1800 1800 18001,800.000



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