### Name: Steve Mills

Title: Designated Representative Company: Public Service Company of Colorado Sign Date: 6/18/2010 Name: Patrick Clark Title: Owner Company:Airtech Environmental Services Sign Date: 6/18/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

## Hayden Unit 1 2010 HAP ICR 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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### Hayden Unit 1 2010 HAP ICR
6/18/2010 Facility Information: Hayden 13125 U.S. Highway 40

Hayden CO81639 Contact:Chad Campbell Phone:303-294-2111 Fax: 303-294-2859 Email: Testing Company: Airtech Environmental Services, Inc. 5776 Lamar Street

Arvada CO80002 Contact:Patrick Clark Phone:303-670-0530 Fax: 303-670-4130 Email:pclark@airtechenv.com

Air Permit Number: 96OPRO132 Permitted Source ID/Name: Unit 1 Boiler 1 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: Source is a Riley single wall-fired pulverized coal boiler with separated over-fire air and Low NOx burners for NOx control, a spray dryer absorber for SO2 control and a baghouse for particulate control. Industry/SCC/NAIS221112

Sampling Location Information:

Test Parameter Information: AFS #:107.0001.001 FRS #:

SCC / Description10100202 External Combustion Boilers - Electric Generation - Bituminous/Subbituminous Coal - Pulverized Coal: Dry Bottom (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 Stack 275 8.73 3.05 4 0 0 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Flowrate Method 1 - 4 3 60 0 12 Sample Points Stack % H2O Method 1 - 4 3 60 0 12 Sample Points Stack Hydrogen Fluoride Method 26A 3 180 0 Stack Hydrogen Chloride Method 26A 3 180 0 Stack Total Particulate OTM - 27/28 3 240 0 Stack Regulation Description Compound Limit Unit Colorado Operating Permit 96OPRO132, Condition 1.1 Total Particulate 0.03 lb/million BTU using CO2



### Friday, February 18, 2011 Page 2 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010

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. Per discussion with Peter Westlin from the EPA on January 22, 2010, a three point traverse was used for Method 26A in lieu of isokinetic testing as the unit did not have any entrained water droplets in the flue gas stream. A constant sampling rate of 0.75 cfm was used for this testing.

Filterable PM2.5 OTM - 27/28 3 240 0 Stack Cobalt Method 29 3 240 0 Stack Selenium Method 29 3 240 0 Stack Nickel Method 29 3 240 0 Stack Manganese Method 29 3 240 0 Stack Lead Method 29 3 240 0 Stack Arsenic Method 29 3 240 0 Stack Chromium Method 29 3 240 0 Stack Beryllium Method 29 3 240 0 Stack Cadmium Method 29 3 240 0 Stack Filterable Particulate Method 29 3 240 0 Stack Antimony Method 29 3 240 0 Stack Filterable Particulate Method 5 3 240 0 Filter from M29 Testing Stack



### Friday, February 18, 2011 Page 3 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010 Sampling / Stack Data Results Summary


### Location Stack - Method 26A Average Run Number 1 2 3 Test Date 2/17/2010 2/17/2010 2/18/2010 Run Start Time 9:19:00 AM2:13:00 PM 8:56:00 AM Run Finish Time 12:19:00 PM5:13:00 PM11:56:00 AM Net Run Time, minutes Dry Gas Meter Volume Sampled, dscf 104.814 110.865 107.401 107.693 Moisture Content of Stack Gas, % 14.57 12.40 12.54 13.170 Moisture Saturation at Stack Gas Temperature, % 50.09 50.67 50.39 50.383 Carbon Dioxide, % 12.5 12.8 13 12.767 Oxygen, % 6.5 6 6 6.167 Average Stack Gas Temperature, °F 168.56 169.06 168.56 168.727 Dry Volumetric Flow Rate, dry scfm 460,098.9 501,151.0 465,954.6475,734.833 Actual Wet Volumetric Flue Gas Flow Rate, acfm 815,948.2 867,424.4 811,988.4831,787.000 Percent Isokinetic of Sampling Rate, % F-Factor, dscfm/MMBtu @ %O2 9717 9729 9651 9,699.000 Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Friday, February 18, 2011 Page 4 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010 Location Stack - Method 29 Average Run Number 1 2 3 Test Date 2/17/2010 2/18/2010 2/19/2010 Run Start Time 8:40:00 AM 8:32:00 AM 8:15:00 AM

Run Finish Time 5:25:00 PM3:38:00 PM 2:55:00 PM Net Run Time, minutes Dry Gas Meter Volume Sampled, dscf 160.872 163.489 167.970 164.110 Moisture Content of Stack Gas, % 14.32 13.27 12.98 13.523 Moisture Saturation at Stack Gas Temperature, % 49.41 49.42 49.33 49.387 Carbon Dioxide, % 13.1 12.8 13 12.967 Oxygen, % 6.1 6.1 6 6.067 Average Stack Gas Temperature, °F 167.97 167.72 167.50 167.730 Dry Volumetric Flow Rate, dry scfm 490,037.1 504,143.4 517,251.4503,810.633 Actual Wet Volumetric Flue Gas Flow Rate, acfm 865,692.0 884,748.2 907,516.5 885,985.567 Percent Isokinetic of Sampling Rate, % F-Factor, dscfm/MMBtu @ %O2 9717 9729 9646 9,697.333 Fw 0 0 0.000 Fc 0 0 0.000



### Location Stack - OTM - 27/28 Average Run Number 1 2 3 Test Date 2/17/2010 2/18/2010 2/19/2010 Run Start Time 8:40:00 AM 8:32:00 AM 8:15:00 AM

Run Finish Time 6:34:00 PM6:20:00 PM 4:37:00 PM Net Run Time, minutes Dry Gas Meter Volume Sampled, dscf 143.612 143.919 135.683 141.071 Moisture Content of Stack Gas, % 12.42 12.64 13.33 12.797 Moisture Saturation at Stack Gas Temperature, % 52.68 52.49 52.22 52.463 Carbon Dioxide, % 12.2 13 12.9 12.700 Oxygen, % 6.2 6.4 6.2 6.267 Average Stack Gas Temperature, °F 170.75 170.33 169.96 170.347 Dry Volumetric Flow Rate, dry scfm 495,987.5 505,985.7 494,407.3498,793.500 Actual Wet Volumetric Flue Gas Flow Rate, acfm 860,989.9 885,243.1 874,353.9 873,528.967 Percent Isokinetic of Sampling Rate, % F-Factor, dscfm/MMBtu @ %O2 9717 9729 9646 9,697.333 Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Friday, February 18, 2011 Page 5 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010

Friday, February 18, 2011 Page 6 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010 Emissions Summary


### Location: Stack - Method 26A Compound: Hydrogen Chloride Average RunNumber 1 2 3 Mass_mg 0.662 0.938 0.729 0.776 lb/mmBtuO2 1.96E-04 2.55E-04 2.03E-04 0.000 

### Compound: Hydrogen Fluoride Average RunNumber 1 2 3 Mass_mg 0.3 0.236 0.239 0.258 lb/mmBtuO2 8.90E-05 6.40E-05 6.64E-05 0.000


### Location: Stack - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.000416 0.000318 0.000423 0.000 lb/mmBtuO2 7.82E-08 5.89E-08 7.51E-08 0.000 

### Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.000485 0.00044 0.000412 0.000 lb/mmBtuO2 9.12E-08 8.15E-08 7.32E-08 0.000 

### Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.000096 0.000091 0.000088 0.000 lb/mmBtuO2 1.81E-08 1.69E-08 1.56E-08 0.000 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.005521 0.004225 0.003425 0.004 lb/mmBtuO2 1.04E-06 7.83E-07 6.08E-07 0.000 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.00232 0.000988 0.014968 0.006 lb/mmBtuO2 4.36E-07 1.83E-07 2.66E-06 0.000 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.000348 0.000298 0.000304 0.000 lb/mmBtuO2 6.54E-08 5.52E-08 5.40E-08 0.000



### Friday, February 18, 2011 Page 7 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010

Process Run Data Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 23.6 22.5 17 21.033 lb/mmBtuO2 4.44E-03 4.17E-03 3.02E-03 0.004 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.00489 0.00501 0.0058 0.005 lb/mmBtuO2 9.20E-07 9.28E-07 1.03E-06 0.000 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.003451 0.002491 0.002781 0.003 lb/mmBtuO2 6.49E-07 4.62E-07 4.94E-07 0.000 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.001209 0.000986 0.005685 0.003 lb/mmBtuO2 2.27E-07 1.83E-07 1.01E-06 0.000 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.00124 0.000476 0.000479 0.001 lb/mmBtuO2 2.33E-07 8.82E-08 8.51E-08 0.000



### Location: Stack - OTM - 27/28 

### Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 4.3 3.35 2.3 3.317 lb/mmBtuO2 9.12E-04 7.20E-04 5.13E-04 0.001 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 8.7 9 7.5 8.400 lb/mmBtuO2 1.85E-03 1.93E-03 1.67E-03 0.002



### Friday, February 18, 2011 Page 8 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010 Process Run Data

APCD Run Data

Process Lab Run Data 

### Run Name Value UOM Comments Target Value 1 Bituminous Coal Burned 2227.7 Tons/million BTU using CO2 0 

### 1 Gross load 201 MW 190 1 Spray dryer absorber pressure drop 2.65 " wc 2.5 1 Spray dryer absorber slurry flow 205 gpm 0 

### 1 Main Steam Flow 1448.6 KPPH 1400 1 SO2 Concentration Setpoint 0.12 lb/MMBtu 0.13 1 Bituminous Coal Feedrate 79.19 % 80 

### 2 Bituminous Coal Burned 2232.7 Tons/million BTU using CO2 0 2 Gross load 201 MW 190 2 Spray dryer absorber pressure drop 2.7 " wc 2.5 

### 2 Spray dryer absorber slurry flow 205.37 gpm 0 2 Main Steam Flow 1445.4 KPPH 1400 2 SO2 Concentration Setpoint 0.12 lb/MMBtu 0.13 

### 2 Bituminous Coal Feedrate 79.26 % 80 3 Bituminous Coal Burned 2216.6 Tons/million BTU using CO2 0 3 Gross load 200.9 MW 190 

### 3 Spray dryer absorber pressure drop 2.64 " wc 2.5 3 Spray dryer absorber slurry flow 202.35 gpm 0 3 Main Steam Flow 1451.3 KPPH 1400 

### 3 SO2 Concentration Setpoint 0.12 lb/MMBtu 0.13 3 Bituminous Coal Feedrate 79.51 % 80

Run Name Value UOM Comments Target Value 

### 1 LOW NOX BURNERS 0 0 1 OVERFIRE AIR 0 0 1 DRY SCRUBBER 0 

### 1 BAGHOUSE 0 0

Run Name ValueUOM Comments 1 Higher heating value 11217Btu/lb 1 Flue Gas Moisture 12.4 %



### Friday, February 18, 2011 Page 9 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010 2 Higher heating value 11150Btu/lb 

### 2 Flue Gas Moisture 12.6 % 3 Higher heating value 11268Btu/lb 3 Flue Gas Moisture 13.3 %



### Friday, February 18, 2011 Page 10 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010 Sampling / Stack Data Results Detail


### Location Stack - Method 26A Average Run Number 1 2 3 Test Date 2/17/2010 2/17/2010 2/18/2010 Run Start Time 9:19:00 AM2:13:00 PM 8:56:00 AM Run Finish Time 12:19:00 PM5:13:00 PM11:56:00 AM Net Traversing Points 18 18 18 Net Run Time, minutes Nozzle Diameter, inches Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0045 1.0045 1.0045 1.005 Barometric Pressure, inches of Mercury 23.52 23.52 23.38 23.473 Average Orifice Meter Differential, inches H2O 1.52 1.74 1.53 1.597 Dry Gas Meter Volume Sampled, cubic feet 131.750 140.530 136.560 136.280 Average Dry Gas Meter Temperature, °F 66.56 71.36 69.50 69.140 Dry Gas Meter Volume Sampled, dscf 104.814 110.865 107.401 107.693 Total Moisture Liquid collected, g 379.6 333.4 327.2 346.733 Volume of Water Vapor, standard cubic feet 17.87 15.69 15.40 16.320 Moisture Content of Stack Gas, % 14.57 12.40 12.54 13.170 Moisture Saturation at Stack Gas Temperature, % 50.09 50.67 50.39 50.383 Dry Mole Fraction 0.8543 0.876 0.8746 0.868 Carbon Dioxide, % 12.5 12.8 13 12.767 Oxygen, % 6.5 6 6 6.167 Carbon Monoxide & Nitrogen, % 81 81.2 81 81.067 Fuel Factor 1.15 1.16 1.15 Dry Molecular Weight, lb/lb-Mole 30.26 30.29 30.32 30.290 Wet Molecular weight, lb/lb-Mole 28.47 28.77 28.78 28.673 Flue Gas Static Pressure, inches of H2O -0.2 -0.2 -0.2 -0.200 Absolute Flue Gas Pressure, inches of Mercury 23.51 23.51 23.37 23.463 Average Stack Gas Temperature, °F 168.56 169.06 168.56 168.727 Average Velocity Head, inches of H2O 0.2244299151 107790.256200555

2084960.223375553

224253 0.235 Average Stack Gas Velocity, feet/second 32.97 35.05 32.81 33.610 Stack Cross-Sectional Area, square feet 412.470 412.470 412.470 412.470 Dry Volumetric Flow Rate, dry scfm 460,098.9 501,151.0 465,954.6475,734.833 Actual Wet Volumetric Flue Gas Flow Rate, acfm 815,948.2 867,424.4 811,988.4831,787.000 Percent Isokinetic of Sampling Rate, % Percent Excess Air, % 43.7 38.9 39.0 40.533 F-Factor, dscfm/MMBtu @ %O2 9717 9729 9651 9,699.000 Round Duct Diameter, inches 275 275 275 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Friday, February 18, 2011 Page 11 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010 Location Stack - Method 29 Average Run Number 1 2 3 Test Date 2/17/2010 2/18/2010 2/19/2010 Run Start Time 8:40:00 AM8:32:00 AM 8:15:00 AM Run Finish Time 5:25:00 PM3:38:00 PM 2:55:00 PM Net Traversing Points 36 36 36 Net Run Time, minutes Nozzle Diameter, inches Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0034 1.0034 1.0034 1.003 Barometric Pressure, inches of Mercury 23.52 23.38 23.3 23.400 Average Orifice Meter Differential, inches H2O 0.91 0.95 0.99 0.950 Dry Gas Meter Volume Sampled, cubic feet 201.980 206.930 211.440 206.783 Average Dry Gas Meter Temperature, °F 64.38 65.56 60.97 63.637 Dry Gas Meter Volume Sampled, dscf 160.872 163.489 167.970 164.110 Total Moisture Liquid collected, g 571.3 531.5 532.2 545.000 Volume of Water Vapor, standard cubic feet 26.89 25.02 25.05 25.653 Moisture Content of Stack Gas, % 14.32 13.27 12.98 13.523 Moisture Saturation at Stack Gas Temperature, % 49.41 49.42 49.33 49.387 Dry Mole Fraction 0.8568 0.8673 0.8702 0.865 Carbon Dioxide, % 13.1 12.8 13 12.967 Oxygen, % 6.1 6.1 6 6.067 Carbon Monoxide & Nitrogen, % 80.8 81.1 81 80.967 Fuel Factor 1.13 1.16 1.15 Dry Molecular Weight, lb/lb-Mole 30.34 30.29 30.32 30.317 Wet Molecular weight, lb/lb-Mole 28.57 28.66 28.72 28.650 Flue Gas Static Pressure, inches of H2O -0.2 -0.2 -0.2 -0.200 Absolute Flue Gas Pressure, inches of Mercury 23.51 23.37 23.29 23.390 Average Stack Gas Temperature, °F 167.97 167.72 167.50 167.730 Average Velocity Head, inches of H2O 0.2538045190 618480.264383043

4408510.277945608

235624 0.265 Average Stack Gas Velocity, feet/second 34.98 35.75 36.67 35.800 Stack Cross-Sectional Area, square feet 412.470 412.470 412.470 412.470 Dry Volumetric Flow Rate, dry scfm 490,037.1 504,143.4 517,251.4503,810.633 Actual Wet Volumetric Flue Gas Flow Rate, acfm 865,692.0 884,748.2 907,516.5885,985.567 Percent Isokinetic of Sampling Rate, % Percent Excess Air, % 40.0 39.8 39.0 39.600 F-Factor, dscfm/MMBtu @ %O2 9717 9729 96469,697.333 Round Duct Diameter, inches 275 275 275 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 0 0 0.000 Fc 0 0 0.000



### Friday, February 18, 2011 Page 12 of 13

### Hayden Unit 1 2010 HAP ICR
6/18/2010 Location Stack - OTM - 27/28 Average Run Number 1 2 3 Test Date 2/17/2010 2/18/2010 2/19/2010 Run Start Time 8:40:00 AM8:32:00 AM 8:15:00 AM Run Finish Time 6:34:00 PM6:20:00 PM 4:37:00 PM Net Traversing Points 24 24 24 Net Run Time, minutes Nozzle Diameter, inches Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0018 1.0018 1.0018 1.002 Barometric Pressure, inches of Mercury 23.52 23.38 23.3 23.400 Average Orifice Meter Differential, inches H2O 0.34 0.34 0.34 0.340 Dry Gas Meter Volume Sampled, cubic feet 182.620 184.390 173.790 180.267 Average Dry Gas Meter Temperature, °F 69.31 70.13 68.17 69.203 Dry Gas Meter Volume Sampled, dscf 143.612 143.919 135.683 141.071 Total Moisture Liquid collected, g 432.5 442.6 443.1 439.400 Volume of Water Vapor, standard cubic feet 20.36 20.83 20.86 20.683 Moisture Content of Stack Gas, % 12.42 12.64 13.33 12.797 Moisture Saturation at Stack Gas Temperature, % 52.68 52.49 52.22 52.463 Dry Mole Fraction 0.8758 0.8736 0.8667 0.872 Carbon Dioxide, % 12.2 13 12.9 12.700 Oxygen, % 6.2 6.4 6.2 6.267 Carbon Monoxide & Nitrogen, % 81.6 80.6 80.9 81.033 Fuel Factor 1.20 1.12 1.14 Dry Molecular Weight, lb/lb-Mole 30.20 30.34 30.31 30.283 Wet Molecular weight, lb/lb-Mole 28.68 28.78 28.67 28.710 Flue Gas Static Pressure, inches of H2O -0.2 -0.2 -0.2 -0.200 Absolute Flue Gas Pressure, inches of Mercury 23.51 23.37 23.29 23.390 Average Stack Gas Temperature, °F 170.75 170.33 169.96 170.347 Average Velocity Head, inches of H2O 0.2509477381 867050.264747837

4654040.256534582

303979 0.257 Average Stack Gas Velocity, feet/second 34.79 35.77 35.33 35.297 Stack Cross-Sectional Area, square feet 412.470 412.470 412.470 412.470 Dry Volumetric Flow Rate, dry scfm 495,987.5 505,985.7 494,407.3498,793.500 Actual Wet Volumetric Flue Gas Flow Rate, acfm 860,989.9 885,243.1 874,353.9873,528.967 Percent Isokinetic of Sampling Rate, % Percent Excess Air, % 40.4 43.0 40.9 41.433 F-Factor, dscfm/MMBtu @ %O2 9717 9729 96469,697.333 Round Duct Diameter, inches 275 275 275 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 0 0 0 0.000 Fc 0 0 0 0.000



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