### Name: Gregory D. Smith

Title: Plant Manager Company: Public Service Company of New Mexi Sign Date: 12/7/2010 Name: Karl G. Breuer Title: Technical Report Writer Company: Air Pollution Testing, Inc. Sign Date: 6/30/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

## San Juan Generating Station ICR Test

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, February 26, 2011 Page 1 of 21

### San Juan Generating Station ICR Test
12/7/2010 Facility Information:
San Juan Unit 2 6800 North County Road

Waterflow NM87421 Contact:Rod Seagle Phone: (598) 505-7529 Fax: (505) 598-7247 Email: rodney.seagle@pnmresources.com Testing Company: Air Pollution Testing, Inc.
5530 Marshall Street

Arvada CO80002 Contact:Scott Bouchard Phone: (303) 420-5949 Fax: Email: sbouchard@airtest.net

Air Permit Number: P062R1M1 Permitted Source ID/Name: San Juan Generating Station SJGS 2 Permitted Maximum Process Rate: Max. Normal Operation Process Rate: Target Process Test Rate

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: Coal fired generating unit burning subbituminuous coal. Controls include, Baghouse, Activated Carbon Injection, and an FGD. Industry/SCC/NAIS 221112

Sampling Location Information:

Test Parameter Information: AFS #: 110000600868 FRS #: 110000600868

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 Unit 2 Stack House 264 6.09 6.59 4 0 16 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Hydrogen Chloride Method 26A 3 180 0 Unit 2 Stack House Hydrogen Fluoride Method 26A 3 180 0 Unit 2 Stack House Cadmium Method 29 3 240 0 Unit 2 Stack House



### Saturday, February 26, 2011 Page 2 of 21

### San Juan Generating Station ICR Test
12/7/2010

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. No deviations were implemented as part of this test program.

Manganese Method 29 3 240 0 Unit 2 Stack House Arsenic Method 29 3 240 0 Unit 2 Stack House Chromium Method 29 3 240 0 Unit 2 Stack House Cobalt Method 29 3 240 0 Unit 2 Stack House Lead Method 29 3 240 0 Unit 2 Stack House Selenium Method 29 3 240 0 Unit 2 Stack House Nickel Method 29 3 240 0 Unit 2 Stack House Antimony Method 29 3 240 0 Unit 2 Stack House O2 Method 3A O2 9 60 0 Unit 2 Stack House Co2 Method 3A CO2 9 60 0 Unit 2 Stack House Organic Condensible

Particulate Method 5/OTM-28 3 240 0 Unit 2 Stack House Inorganic (Aqueous)

Condensible Part. Method 5/OTM-28 3 240 0 Unit 2 Stack House Filterable Particulate Method 5/OTM-28 3 240 0 Unit 2 Stack House Total Particulate Method 5/OTM-28 3 240 0 Unit 2 Stack House



### Saturday, February 26, 2011 Page 3 of 21

### San Juan Generating Station ICR Test
12/7/2010 Sampling / Stack Data Results Summary


### Location Unit 2 Stack House - Method 26A Average Run Number 1 2 3
Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 9:02:00 AM 7:06:00 AM 7:25:00 AM

Run Finish Time 1:30:00 PM 12:00:00 PM 12:02:00 PM

Net Run Time, minutes 180 180 180 Dry Gas Meter Volume Sampled, dscf 91.694 95.842 100.078 95.871 Moisture Content of Stack Gas, % 12.10 12.96 12.55 12.537 Moisture Saturation at Stack Gas Temperature, % 11.98 12.26 12.16 12.133 Carbon Dioxide, % 12.8 12.8 12.8 12.800 Oxygen, % 6.2 6.3 6.3 6.267 Average Stack Gas Temperature, °F 114.31 114.84 114.16 114.437 Dry Volumetric Flow Rate, dry scfm 785,439.9 830,279.7 850,233.0 821,984.200 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,185,330.7 1,269,036.0 1,310,546.5 1,254,971.06 7 Percent Isokinetic of Sampling Rate, % 97.8 96.7 98.6 97.700 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



### Saturday, February 26, 2011 Page 4 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 29 Average Run Number 1 2 3
Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 8:54:00 AM 7:16:00 AM 7:31:00 AM

Run Finish Time 4:07:30 PM2:12:30 PM 12:31:30 PM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 130.761 135.297 134.049 133.369 Moisture Content of Stack Gas, % 12.55 13.13 12.88 12.853 Moisture Saturation at Stack Gas Temperature, % 12.34 12.46 12.46 12.420 Carbon Dioxide, % 12.8 12.8 12.7 12.767 Oxygen, % 6.2 6.3 6.4 6.300 Average Stack Gas Temperature, °F 115.38 115.41 115.03 115.273 Dry Volumetric Flow Rate, dry scfm 806,463.0 846,009.8 847,372.4 833,281.733 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,224,332.4 1,297,317.9 1,312,599.2 1,278,083.16 7 Percent Isokinetic of Sampling Rate, % 101.9 102.4 101.3 101.867 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



### Location Unit 2 Stack House - Method 3A CO2 Average Run Number 1 2 3
Test Date 4/27/2010 4/27/2010 4/27/2010 Run Start Time 7:10:00 AM 9:55:00 AM 1:05:00 PM

Run Finish Time 9:12:00 AM 12:40:00 PM 4:19:00 PM

Carbon Dioxide, % 12.8 12.8 12.9 12.833 Oxygen, % 6.3 6.2 6 6.167 Dry Volumetric Flow Rate, dry scfm 793858 793858 793858 793,858.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 13.2 13.2 13.2 13.200 Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous
Fw 10640 10640 10640 10,640.000
Fc 1800 1800 1800 1,800.000



### Saturday, February 26, 2011 Page 5 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A CO2 3 Average Run Number 4 5 6 Test Date 4/28/2010 4/28/2010 4/28/2010 Run Start Time 7:03:00 AM 9:31:00 AM 11:55:00 AM

Run Finish Time 9:12:00 AM 11:40:00 AM 12:55:00 PM

Carbon Dioxide, % 12.8 12.8 12.9 12.833 Oxygen, % 6.4 6.3 6.2 6.300 Dry Volumetric Flow Rate, dry scfm 834835 834835 834835 834,835.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 13.4 13.4 13.4 13.400 Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous
Fw 10640 10640 10640 10,640.000
Fc 1800 1800 1800 1,800.000



### Location Unit 2 Stack House - Method 3A CO2 3 6 Average Run Number 7 8 9
Test Date 4/29/2010 4/29/2010 4/29/2010 Run Start Time 7:16:00 AM 9:21:00 AM 11:48:00 AM

Run Finish Time 7:59:00 AM 11:26:00 AM 1:41:00 PM

Carbon Dioxide, % 12.2 12.7 12.9 12.600 Oxygen, % 6.6 6.4 6.3 6.433 Dry Volumetric Flow Rate, dry scfm 853168 853168 853168 853,168.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 14.2 14.2 14.2 14.200 Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous
Fw 10640 10640 10640 10,640.000
Fc 1800 1800 1800 1,800.000



### Saturday, February 26, 2011 Page 6 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A O2 Average Run Number 1 2 3
Test Date 4/27/2010 4/27/2010 4/27/2010 Run Start Time 7:10:00 AM 9:55:00 AM 1:05:00 PM

Run Finish Time 9:12:00 AM 12:40:00 PM 4:19:00 PM

Carbon Dioxide, % 12.8 12.8 12.9 12.833 Oxygen, % 6.3 6.2 6 6.167 Dry Volumetric Flow Rate, dry scfm 793858 793858 793858 793,858.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 13.2 13.2 13.2 13.200 Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous
Fw 10640 10640 10640 10,640.000
Fc 1800 1800 1800 1,800.000



### Location Unit 2 Stack House - Method 3A O2 3 Average Run Number 4 5 6 Test Date 4/28/2010 4/28/2010 4/28/2010 Run Start Time 7:03:00 AM 9:31:00 AM 11:55:00 AM

Run Finish Time 9:12:00 AM 11:40:00 AM 12:55:00 PM

Carbon Dioxide, % 12.8 12.8 12.9 12.833 Oxygen, % 6.4 6.3 6.2 6.300 Dry Volumetric Flow Rate, dry scfm 834835 834835 834835 834,835.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 13.4 13.4 13.4 13.400 Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous
Fw 10640 10640 10640 10,640.000
Fc 1800 1800 1800 1,800.000



### Saturday, February 26, 2011 Page 7 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A O2 3 6 Average Run Number 7 8 9
Test Date 4/29/2010 4/29/2010 4/29/2010 Run Start Time 7:16:00 AM 9:21:00 AM 11:48:00 AM

Run Finish Time 7:59:00 AM 11:26:00 AM 1:41:00 PM

Carbon Dioxide, % 12.2 12.7 12.9 12.600 Oxygen, % 6.6 6.4 6.3 6.433 Dry Volumetric Flow Rate, dry scfm 853168 853168 853168 853,168.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 14.2 14.2 14.2 14.200 Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous
Fw 10640 10640 10640 10,640.000
Fc 1800 1800 1800 1,800.000



### Location Unit 2 Stack House - Method 5/OTM-28 Average Run Number 1 2 3
Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 7:47:00 AM 7:06:00 AM 7:25:00 AM

Run Finish Time 3:50:00 PM 12:23:00 PM 11:28:00 AM

Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 129.734 134.736 138.023 134.164 Moisture Content of Stack Gas, % 12.73 13.27 14.14 13.380 Moisture Saturation at Stack Gas Temperature, % 12.52 12.87 12.41 12.600 Carbon Dioxide, % 12.8 12.8 12.7 12.767 Oxygen, % 6.2 6.3 6.4 6.300 Average Stack Gas Temperature, °F 115.88 116.56 114.88 115.773 Dry Volumetric Flow Rate, dry scfm 791,525.4 833,867.2 848,372.3 824,588.300 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,205,173.7 1,287,282.4 1,313,055.4 1,268,503.83 3 Percent Isokinetic of Sampling Rate, % 103.0 101.5 102.2 102.233 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



### Saturday, February 26, 2011 Page 8 of 21

### San Juan Generating Station ICR Test
12/7/2010 Emissions Summary


### Location: Unit 2 Stack House - Method 26A Compound: Hydrogen Chloride Average RunNumber 1 2 3 Mass_mg 0.335 0.308 0.522 0.388 lb/mmBtuO2 1.12E-04 9.92E-05 1.61E-04 0.000 

### Compound: Hydrogen Fluoride Average RunNumber 1 2 3 Mass_mg 0.682 0.626 1.06 0.789 lb/mmBtuO2 2.28E-04 2.02E-04 3.27E-04 0.000



### Location: Unit 2 Stack House - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.0002 0.0002 0.0002 0.000 mg/dscm 5.40E-05 5.22E-05 5.27E-05 0.000 

### Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.0002 0.0002 0.0002 0.000 mg/dscm 5.40E-05 5.22E-05 5.27E-05 0.000 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.0004 0.0003 0.0004 0.000 mg/dscm 1.08E-04 7.83E-05 1.05E-04 0.000 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.0087 0.0048 0.0056 0.006 mg/dscm 2.35E-03 1.25E-03 1.48E-03 0.002 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.0018 0.0011 0.0028 0.002 mg/dscm 4.86E-04 2.87E-04 7.38E-04 0.001 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.0021 0.0014 0.0014 0.002 mg/dscm 5.67E-04 3.65E-04 3.69E-04 0.000



### Saturday, February 26, 2011 Page 9 of 21

### San Juan Generating Station ICR Test
12/7/2010

Process Run Data Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.0181 0.0102 0.0094 0.013 mg/dscm 4.89E-03 2.66E-03 2.48E-03 0.003 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.0085 0.0057 0.0188 0.011 mg/dscm 2.30E-03 1.49E-03 4.95E-03 0.003 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.0005 0.0015 0.0005 0.001 mg/dscm 1.35E-04 3.92E-04 1.32E-04 0.000



### Location: Unit 2 Stack House - Method 5/OTM-28 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 15.4 21.8 24 20.400 lb/mmBtuO2 3.64E-03 4.99E-03 5.40E-03 0.005 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 6.5 7.2 4 5.900 lb/mmBtuO2 1.54E-03 1.65E-03 9.01E-04 0.001 

### Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 10.2 13.7 12.1 12.000 lb/mmBtuO2 2.41E-03 3.14E-03 2.72E-03 0.003 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 32.1 42.7 40.1 38.300 lb/mmBtuO2 7.58E-03 9.78E-03 9.03E-03 0.009



### Saturday, February 26, 2011 Page 10 of 21

### San Juan Generating Station ICR Test
12/7/2010 Process Run Data

APCD Run Data 

### Run Name Value UOM Comments Target Value 1 Heat Input 3240 mmBtu/hr 3300


### 1 Load 331 Mw 330
1 Steam Output 2090 klbs/hr 2100
1 Stack Moisture 10.63 % 13


### 1 Stack Flow Rate 776794 dscfm 800000
1 Stack Temperature 118 Deg F 115
1 Coal Flow Rate 352970 lbs/hr 353000


### 1 CO2 13 % 13
1 O2 6.4 % 6.2
2 Heat Input 3557 mmBtu/hr 3300


### 2 Load 361 Mw 330
2 Steam Output 2271 klbs/hr 2100
2 Stack Moisture 10.31 % 13


### 2 Stack Flow Rate 834374 dscfm 800000
2 Stack Temperature 117 Deg F 115
2 Coal Flow Rate 389784 lbs/hr 353000


### 2 CO2 13.1 % 13
2 O2 6.3 % 6.2
3 Heat Input 3507 mmBtu/hr 3300


### 3 Load 357 Mw 330
3 Steam Output 2250 klbs/hr 2100
3 Stack Moisture 10.1 % 13


### 3 Stack Flow Rate 827690 dscfm 800000
3 Stack Temperature 116 Deg F 115


### 3 Coal Flow Rate 385824 lbs/hr 353000
3 CO2 13 % 13
3 O2 6.4 % 6.2

Run Name Value UOM Comments Target Value 

### 1 ACTIVATED CARBON ADSORPTION 0.15 ACI Feed Rate #/macf0.15
2 ACTIVATED CARBON ADSORPTION 0.15 ACI Feed Rate #/macf0.15
3 ACTIVATED CARBON ADSORPTION 0.15 ACI Feed Rate #/macf0.15



### Saturday, February 26, 2011 Page 11 of 21

### San Juan Generating Station ICR Test
12/7/2010

Process Lab Run Data 1 BAGHOUSE 99.99 Removal Efficiency99.99


### 2 BAGHOUSE 99.99 Removal Efficiency99.99
3 BAGHOUSE 99.99 Removal Efficiency99.99
1 SPRAY SCRUBBER 92.2Removal Efficiency 90


### 2 SPRAY SCRUBBER 92.2Removal Efficiency 90
3 SPRAY SCRUBBER 92.2Removal Efficiency 90



### Run Name Value UOM Comments 1 Scrubber TDS 51700 mg/l 1 Scrubber TSS 1E+05 mg/l 1 Scrubber Delta Pressure 0.523 "H2O 1 Scrubber Liquor Flow Rate 17.56 gal/min 

### 2 Scrubber TDS 56900 mg/l 2 Scrubber TSS 1E+05 mg/l 2 Scrubber Delta Pressure 0.617 "H2O 2 Scrubber Liquor Flow Rate 15.96 gal/min 

### 3 Scrubber TDS 43420 mg/l 3 Scrubber TSS 1E+05 mg/l 3 Scrubber Delta Pressure 0.583 "H2O 

### 3 Scrubber Liquor Flow Rate 15.81 gal/min

Saturday, February 26, 2011 Page 12 of 21

### San Juan Generating Station ICR Test
12/7/2010 Sampling / Stack Data Results Detail


### Location Unit 2 Stack House - Method 26A Average Run Number 1 2 3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 9:02:00 AM 7:06:00 AM 7:25:00 AM Run Finish Time 1:30:00 PM12:00:00 PM 12:02:00 PM Net Traversing Points 32 32 32 Net Run Time, minutes 180 180 180 Nozzle Diameter, inches 0.215 0.215 0.215 0.215 Pitot Tube Coefficient 0.82 0.82 0.82 0.820 Dry Gas Meter Calibration Factor 0.994 0.994 0.994 0.994 Barometric Pressure, inches of Mercury 24.6 24.39 24.13 24.373 Average Orifice Meter Differential, inches H2O 1.12 1.29 1.33 1.247 Dry Gas Meter Volume Sampled, cubic feet 112.630 121.160 123.956 119.249 Average Dry Gas Meter Temperature, °F 71.81 82.95 66.38 73.713 Dry Gas Meter Volume Sampled, dscf 91.694 95.842 100.078 95.871 Total Moisture Liquid collected, g 268.2 303.2 305 292.133 Volume of Water Vapor, standard cubic feet 12.62 14.27 14.36 13.750 Moisture Content of Stack Gas, % 12.10 12.96 12.55 12.537 Moisture Saturation at Stack Gas Temperature, % 11.98 12.26 12.16 12.133 Dry Mole Fraction 0.8802 0.8774 0.8784 0.879 Carbon Dioxide, % 12.8 12.8 12.8 12.800 Oxygen, % 6.2 6.3 6.3 6.267 Carbon Monoxide & Nitrogen, % 81 80.9 80.9 80.933 Fuel Factor 1.15 1.14 1.14 Dry Molecular Weight, lb/lb-Mole 30.30 30.30 30.30 30.300 Wet Molecular weight, lb/lb-Mole 28.85 28.92 28.87 28.880 Flue Gas Static Pressure, inches of H2O -1.3 -1.3 -1.3 -1.300 Absolute Flue Gas Pressure, inches of Mercury 24.50 24.29 24.03 24.273 Average Stack Gas Temperature, °F 114.31 114.84 114.16 114.437 Average Velocity Head, inches of H2O 0.6764898751 985140.769922853

98165 0.811650943

34238 0.753
Average Stack Gas Velocity, feet/second 51.97 55.64 57.46 55.023 Stack Cross-Sectional Area, square feet 380.133 380.133 380.133 380.133 Dry Volumetric Flow Rate, dry scfm 785,439.9 830,279.7 850,233.0821,984.200 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,185,330.7 1,269,036.0 1,310,546.51,254,971.0 67 Percent Isokinetic of Sampling Rate, % 97.8 96.7 98.6 97.700 Percent Excess Air, % 40.8 41.8 41.8 41.467 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Round Duct Diameter, inches 264 264 264 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000



### Saturday, February 26, 2011 Page 13 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 29 Average Run Number 1 2 3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 8:54:00 AM 7:16:00 AM 7:31:00 AM Run Finish Time 4:07:30 PM 2:12:30 PM 12:31:30 PM Net Traversing Points 32 32 32 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.215 0.213 0.213 0.214 Pitot Tube Coefficient 0.83 0.83 0.83 0.830 Dry Gas Meter Calibration Factor 0.993 0.993 0.993 0.993 Barometric Pressure, inches of Mercury 24.6 24.39 24.13 24.373 Average Orifice Meter Differential, inches H2O 1.24 1.35 0.80 1.130 Dry Gas Meter Volume Sampled, cubic feet 162.253 169.871 167.912 166.679 Average Dry Gas Meter Temperature, °F 76.88 78.80 70.95 75.543 Dry Gas Meter Volume Sampled, dscf 130.761 135.297 134.049 133.369 Total Moisture Liquid collected, g 398.6 434.4 421.1 418.033 Volume of Water Vapor, standard cubic feet 18.76 20.45 19.82 19.677 Moisture Content of Stack Gas, % 12.55 13.13 12.88 12.853 Moisture Saturation at Stack Gas Temperature, % 12.34 12.46 12.46 12.420 Dry Mole Fraction 0.8766 0.8754 0.8754 0.876 Carbon Dioxide, % 12.8 12.8 12.7 12.767 Oxygen, % 6.2 6.3 6.4 6.300 Carbon Monoxide & Nitrogen, % 81 80.9 80.9 80.933 Fuel Factor 1.15 1.14 1.14 Dry Molecular Weight, lb/lb-Mole 30.30 30.30 30.29 30.297 Wet Molecular weight, lb/lb-Mole 28.82 28.89 28.83 28.847 Flue Gas Static Pressure, inches of H2O -1.3 -1.3 -1.3 -1.300 Absolute Flue Gas Pressure, inches of Mercury 24.50 24.29 24.03 24.273 Average Stack Gas Temperature, °F 115.38 115.41 115.03 115.273 Average Velocity Head, inches of H2O 0.7023925133 468250.783707480

328602 0.792590552

018538 0.760
Average Stack Gas Velocity, feet/second 53.68 56.88 57.55 56.037 Stack Cross-Sectional Area, square feet 380.133 380.133 380.133 380.133 Dry Volumetric Flow Rate, dry scfm 806,463.0 846,009.8 847,372.4833,281.733 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,224,332.4 1,297,317.9 1,312,599.21,278,083.1 67 Percent Isokinetic of Sampling Rate, % 101.9 102.4 101.3 101.867 Percent Excess Air, % 40.8 41.8 42.8 41.800 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Round Duct Diameter, inches 264 264 264 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000



### Saturday, February 26, 2011 Page 14 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A CO2 Average Run Number 1 2 3 Test Date 4/27/2010 4/27/2010 4/27/2010 Run Start Time 7:10:00 AM 9:55:00 AM 1:05:00 PM Run Finish Time 9:12:00 AM12:40:00 PM 4:19:00 PM Carbon Dioxide, % 12.8 12.8 12.9 12.833 Oxygen, % 6.3 6.2 6 6.167 Fuel Factor 1.14 1.15 1.16 Dry Volumetric Flow Rate, dry scfm 793858 793858 793858793,858.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 13.2 13.2 13.2 13.200 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 10.1 10.1 10.1 10.100 Operating Units % % % No. Readings/Avg. 122 165 96 127.667 Calibration Set 1 1 1 1.000 Calibration Pre Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Pre Zero Cylinder Instrument Response 0.2 0.1 0.2 0.167 Calibration Pre Zero Cylinder Bias 1.02 0.51 1.02 0.850 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM017313ALM017313 ALM017313 Calibration Pre High Cylinder Instrument Response 10.1 10.2 10.2 10.167 Calibration Pre High Cylinder Bias -0.51 0 0 -0.170 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Post Zero Cylinder Instrument Response 0.1 0.2 0.2 0.167 Calibration Post Zero Cylinder Bias 0.51 1.02 1.02 0.850 Calibration Post Zero Cylinder Drift 0.51 0.51 0 0.340 Calibration Post High Cylinder ID ALM017313ALM017313 ALM017313 Calibration Post High Cylinder Instrument Response 10.02 10.2 10.2 10.140 Calibration Post High Cylinder Bias -0.92 0 0 -0.307 Calibration Post High Cylinder Drift 0.41 0 0 0.137 Cavg 12.8 12.8 12.9 12.833 Cavg Units %vd %vd %vd Cgas 12.8925 12.7129 12.827 12.811 Cgas Units %vd %vd %vd Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000 Cgasw 0 0 0 0.000 Cgasw Units



### Saturday, February 26, 2011 Page 15 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A CO2 3 Average Run Number 4 5 6 Test Date 4/28/2010 4/28/2010 4/28/2010 Run Start Time 7:03:00 AM 9:31:00 AM 11:55:00 AM Run Finish Time 9:12:00 AM11:40:00 AM 12:55:00 PM Carbon Dioxide, % 12.8 12.8 12.9 12.833 Oxygen, % 6.4 6.3 6.2 6.300 Fuel Factor 1.13 1.14 1.14 Dry Volumetric Flow Rate, dry scfm 834835 834835 834835834,835.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 13.4 13.4 13.4 13.400 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 10.1 10.1 10.1 10.100 Operating Units % % % No. Readings/Avg. 129 129 60 106.000 Calibration Set 2 2 2 2.000 Calibration Pre Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Pre Zero Cylinder Instrument Response 0.1 0.2 0.3 0.200 Calibration Pre Zero Cylinder Bias 0.51 0 1.53 0.680 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM017313ALM017313 ALM017313 Calibration Pre High Cylinder Instrument Response 10 10.4 10.3 10.233 Calibration Pre High Cylinder Bias -1.02 0 0.51 -0.170 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Post Zero Cylinder Instrument Response 0.2 0.3 0.2 0.233 Calibration Post Zero Cylinder Bias 1.02 1.53 1.02 1.190 Calibration Post Zero Cylinder Drift 0.51 1.53 0.51 0.850 Calibration Post High Cylinder ID ALM017313ALM017313 ALM017313 Calibration Post High Cylinder Instrument Response 10.4 10.3 10.3 10.333 Calibration Post High Cylinder Bias 1.02 0.51 0.51 0.680 Calibration Post High Cylinder Drift 2.04 0.51 0 0.850 Cavg 12.8 12.8 12.9 12.833 Cavg Units %vd %vd %vd Cgas 12.7129 12.55 12.7129 12.659 Cgas Units %vd %vd %vd Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000 Cgasw 0 0 0 0.000 Cgasw Units



### Saturday, February 26, 2011 Page 16 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A CO2 3 6 Average Run Number 7 8 9 Test Date 4/29/2010 4/29/2010 4/29/2010 Run Start Time 7:16:00 AM 9:21:00 AM 11:48:00 AM Run Finish Time 7:59:00 AM11:26:00 AM 1:41:00 PM Carbon Dioxide, % 12.2 12.7 12.9 12.600 Oxygen, % 6.6 6.4 6.3 6.433 Fuel Factor 1.17 1.14 1.13 Dry Volumetric Flow Rate, dry scfm 853168 853168 853168853,168.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 14.2 14.2 14.2 14.200 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 10.1 10.1 10.1 10.100 Operating Units % % % No. Readings/Avg. 43 125 113 93.667 Calibration Set 3 3 3 3.000 Calibration Pre Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Pre Zero Cylinder Instrument Response 0.1 0.2 0.1 0.133 Calibration Pre Zero Cylinder Bias 0.51 1.02 0.51 0.680 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM017313ALM017313 ALM017313 Calibration Pre High Cylinder Instrument Response 10.1 10.2 10.2 10.167 Calibration Pre High Cylinder Bias -0.51 0 0 -0.170 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Post Zero Cylinder Instrument Response 0.2 0.1 0.2 0.167 Calibration Post Zero Cylinder Bias 1.02 0.51 1.02 0.850 Calibration Post Zero Cylinder Drift 0.51 0.51 0.51 0.510 Calibration Post High Cylinder ID ALM017313ALM017313 ALM017313 Calibration Post High Cylinder Instrument Response 10.2 10.1 10.1 10.133 Calibration Post High Cylinder Bias 0 -0.51 -0.51 -0.340 Calibration Post High Cylinder Drift 0.51 0.51 0.51 0.510 Cavg 12.2 12.7 12.9 12.600 Cavg Units %vd %vd %vd Cgas 12.1705 12.6755 12.8775 12.575 Cgas Units %vd %vd %vd Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000 Cgasw 0 0 0 0.000 Cgasw Units



### Saturday, February 26, 2011 Page 17 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A O2 Average Run Number 1 2 3 Test Date 4/27/2010 4/27/2010 4/27/2010 Run Start Time 7:10:00 AM 9:55:00 AM 1:05:00 PM Run Finish Time 9:12:00 AM12:40:00 PM 4:19:00 PM Carbon Dioxide, % 12.8 12.8 12.9 12.833 Oxygen, % 6.3 6.2 6 6.167 Fuel Factor 1.14 1.15 1.16 Dry Volumetric Flow Rate, dry scfm 793858 793858 793858793,858.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 13.2 13.2 13.2 13.200 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 10 10 10 10.000 Operating Units % % % No. Readings/Avg. 122 165 96 127.667 Calibration Set 4 4 4 4.000 Calibration Pre Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Pre Zero Cylinder Instrument Response 0 -0.1 -0.1 -0.067 Calibration Pre Zero Cylinder Bias 0 -0.47 -0.47 -0.313 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM017313AALM017313 A ALM017313

A Calibration Pre High Cylinder Instrument Response 9.9 10 9.9 9.933 Calibration Pre High Cylinder Bias -0.95 -0.47 -0.95 -0.790 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Post Zero Cylinder Instrument Response -0.1 -0.1 -0.1 -0.100 Calibration Post Zero Cylinder Bias -0.47 -0.47 -0.47 -0.470 Calibration Post Zero Cylinder Drift 0.47 0 0 0.157 Calibration Post High Cylinder ID ALM017313AALM017313 A ALM017313

A Calibration Post High Cylinder Instrument Response 10 9.9 9.8 9.900 Calibration Post High Cylinder Bias -0.47 -0.95 -1.42 -0.947 Calibration Post High Cylinder Drift 0.48 0.48 0.47 0.477 Cavg 6.3 6.2 6 6.167 Cavg Units %vd %vd %vd Cgas 6.35 6.2687 6.1307 6.250 Cgas Units %vd %vd %vd Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000 Cgasw 0 0 0 0.000 Cgasw Units



### Saturday, February 26, 2011 Page 18 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A O2 3 Average Run Number 4 5 6 Test Date 4/28/2010 4/28/2010 4/28/2010 Run Start Time 7:03:00 AM 9:31:00 AM 11:55:00 AM Run Finish Time 9:12:00 AM11:40:00 AM 12:55:00 PM Carbon Dioxide, % 12.8 12.8 12.9 12.833 Oxygen, % 6.4 6.3 6.2 6.300 Fuel Factor 1.13 1.14 1.14 Dry Volumetric Flow Rate, dry scfm 834835 834835 834835834,835.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 13.4 13.4 13.4 13.400 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 10 10 10 10.000 Operating Units % % % No. Readings/Avg. 129 129 60 106.000 Calibration Set 5 5 5 5.000 Calibration Pre Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Pre Zero Cylinder Instrument Response -0.1 -0.1 -0.1 -0.100 Calibration Pre Zero Cylinder Bias -0.47 -0.47 -0.47 -0.470 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM017313AALM017313 A ALM017313

A Calibration Pre High Cylinder Instrument Response 9.9 10 9.8 9.900 Calibration Pre High Cylinder Bias -0.47 0 -0.95 -0.473 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Post Zero Cylinder Instrument Response -0.1 -0.1 -0.2 -0.133 Calibration Post Zero Cylinder Bias -0.47 -0.47 -0.95 -0.630 Calibration Post Zero Cylinder Drift 0 0 0.48 0.160 Calibration Post High Cylinder ID ALM017313AALM017313 A ALM017313

A Calibration Post High Cylinder Instrument Response 10 9.8 9.9 9.900 Calibration Post High Cylinder Bias 0 -0.95 -0.47 -0.473 Calibration Post High Cylinder Drift 0.47 0.95 0.48 0.633 Cavg 6.4 6.3 6.2 6.300 Cavg Units %vd %vd %vd Cgas 6.4677 6.4 6.35 6.406 Cgas Units %vd %vd %vd Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000 Cgasw 0 0 0 0.000 Cgasw Units



### Saturday, February 26, 2011 Page 19 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 3A O2 3 6 Average Run Number 7 8 9 Test Date 4/29/2010 4/29/2010 4/29/2010 Run Start Time 7:16:00 AM 9:21:00 AM 11:48:00 AM Run Finish Time 7:59:00 AM11:26:00 AM 1:41:00 PM Carbon Dioxide, % 12.2 12.7 12.9 12.600 Oxygen, % 6.6 6.4 6.3 6.433 Fuel Factor 1.17 1.14 1.13 Dry Volumetric Flow Rate, dry scfm 853168 853168 853168853,168.000 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Moisture, % 14.2 14.2 14.2 14.200 Analyzer Make Analyzer Model Analyzer Serial Number Operating Range 10 10 10 10.000 Operating Units % % % No. Readings/Avg. 43 125 113 93.667 Calibration Set 6 6 6 6.000 Calibration Pre Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Pre Zero Cylinder Instrument Response 0 0 -0.1 -0.033 Calibration Pre Zero Cylinder Bias 0 0 -0.47 -0.157 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID ALM017313AALM017313 A ALM017313

A Calibration Pre High Cylinder Instrument Response 9.9 10 9.9 9.933 Calibration Pre High Cylinder Bias -1.42 -0.95 -1.42 -1.263 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID Zero Gas Zero Gas Zero Gas Calibration Post Zero Cylinder Instrument Response 0 -0.1 0 -0.033 Calibration Post Zero Cylinder Bias 0 -0.47 0 -0.157 Calibration Post Zero Cylinder Drift 0 0.47 0.47 0.313 Calibration Post High Cylinder ID ALM017313AALM017313 A ALM017313

A Calibration Post High Cylinder Instrument Response 10 9.9 10 9.967 Calibration Post High Cylinder Bias -0.95 -1.42 -0.95 -1.107 Calibration Post High Cylinder Drift 0.47 0.47 0.47 0.470 Cavg 6.6 6.4 6.3 6.433 Cavg Units %vd %vd %vd Cgas 6.6332 0 6.35 4.328 Cgas Units %vd %vd %vd Fuel Type Coal - Bituminous Coal -

Bituminous Coal -

Bituminous Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000 Cgasw 0 0 0 0.000 Cgasw Units



### Saturday, February 26, 2011 Page 20 of 21

### San Juan Generating Station ICR Test
12/7/2010
Location Unit 2 Stack House - Method 5/OTM-28 Average Run Number 1 2 3 Test Date 4/27/2010 4/28/2010 4/29/2010 Run Start Time 7:47:00 AM 7:06:00 AM 7:25:00 AM Run Finish Time 3:50:00 PM12:23:00 PM 11:28:00 AM Net Traversing Points 16 16 16 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.215 0.215 0.215 0.215 Pitot Tube Coefficient 0.83 0.83 0.83 0.830 Dry Gas Meter Calibration Factor 1.002 1.002 1.002 1.002 Barometric Pressure, inches of Mercury 24.6 24.39 24.13 24.373 Average Orifice Meter Differential, inches H2O 1.07 1.18 1.22 1.157 Dry Gas Meter Volume Sampled, cubic feet 158.840 167.484 170.238 165.521 Average Dry Gas Meter Temperature, °F 74.28 78.00 68.22 73.500 Dry Gas Meter Volume Sampled, dscf 129.734 134.736 138.023 134.164 Total Moisture Liquid collected, g 402.2 438 482.9 441.033 Volume of Water Vapor, standard cubic feet 18.93 20.62 22.73 20.760 Moisture Content of Stack Gas, % 12.73 13.27 14.14 13.380 Moisture Saturation at Stack Gas Temperature, % 12.52 12.87 12.41 12.600 Dry Mole Fraction 0.8748 0.8713 0.8759 0.874 Carbon Dioxide, % 12.8 12.8 12.7 12.767 Oxygen, % 6.2 6.3 6.4 6.300 Carbon Monoxide & Nitrogen, % 81 80.9 80.9 80.933 Fuel Factor 1.15 1.14 1.14 Dry Molecular Weight, lb/lb-Mole 30.30 30.30 30.29 30.297 Wet Molecular weight, lb/lb-Mole 28.80 28.79 29.08 28.890 Flue Gas Static Pressure, inches of H2O -1.3 -1.3 -1.3 -1.300 Absolute Flue Gas Pressure, inches of Mercury 24.50 24.29 24.03 24.273 Average Stack Gas Temperature, °F 115.88 116.56 114.88 115.773 Average Velocity Head, inches of H2O 0.6794325326 077730.767496441

354658 0.800156426

575171 0.749
Average Stack Gas Velocity, feet/second 52.84 56.44 57.57 55.617 Stack Cross-Sectional Area, square feet 380.133 380.133 380.133 380.133 Dry Volumetric Flow Rate, dry scfm 791,525.4 833,867.2 848,372.3824,588.300 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,205,173.7 1,287,282.4 1,313,055.41,268,503.8 33 Percent Isokinetic of Sampling Rate, % 103.0 101.5 102.2 102.233 Percent Excess Air, % 17.0 41.8 42.8 33.867 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Round Duct Diameter, inches 264 264 264 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10640 10640 1064010,640.000 Fc 1800 1800 1800 1,800.000



### Saturday, February 26, 2011 Page 21 of 21