### Name: Steve Mills

Title: Designated Representative Company: Public Service Company of Colorado Sign Date: 6/17/2010 Name: Patrick Clark Title: Owner Company:Airtech Environmental Services Sign Date: 6/17/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

## Valmont Unit 5 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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### Valmont Unit 5 2010 HAP ICR 6/17/2010 Facility Information: Valmont 1800 N. 63rd Street

Boulder CO80301 Contact:Chad Campbell Phone:303-294-2111 Fax: 303-294-2859 Email: chad.campbell@xcelenergy.com Testing Company: Airtech Environmental Services, Inc. 5776 Lamar St.

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

Air Permit Number: 96OPBO131 Permitted Source ID/Name: Unit 5 Boiler 5 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: Tangentially fired CE boiler with low Nox burner retrofit and seperated overfire air. Spray dryer absorber to control SO2 and fabric filter dust collector to control PM emissions.

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 of EPA on January 22, 2010, a 3-point traverse was used in lieu of sampling Industry/SCC/NAIS221112

Sampling Location Information:

Test Parameter Information: AFS #:013.0001.001 FRS #:110000467290

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 Stack 266.04 319.248 2027.2248 1 266.04 3 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Hydrogen Fluoride Method 26A 3 180 0 Stack Hydrogen Chloride Method 26A 3 180 0 Stack



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### Valmont Unit 5 2010 HAP ICR 6/17/2010 isokinetically for Method 26A at a rate of 0.75 cfm as there are no entrained water droplets in the flue gas stream.



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### Valmont Unit 5 2010 HAP ICR 6/17/2010

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### Valmont Unit 5 2010 HAP ICR 6/17/2010 Sampling / Stack Data Results Summary 

### LocationStack - Method 26A Average Run Number 2 3 4 Test Date 3/3/2010 3/4/2010 3/4/2010 Run Start Time 1:00:00 PM 8:33:00 AM12:07:00 PM
Run Finish Time 4:00:00 PM 11:33:00 AM 3:07:00 PM
Net Run Time, minutes Dry Gas Meter Volume Sampled, dscf 112.820 117.291 114.498 114.870 Moisture Content of Stack Gas, % 11.15 10.57 11.05 10.923 Moisture Saturation at Stack Gas Temperature, % 52.96 53.70 56.26 54.307 Carbon Dioxide, % 12.1 12.2 12.2 12.167 Oxygen, % 7 6.8 6.8 6.867 Average Stack Gas Temperature, °F 173.00 173.61 175.67 174.093 Dry Volumetric Flow Rate, dry scfm 400,300.6 400,111.2 371,609.1 390,673.633 Actual Wet Volumetric Flue Gas Flow Rate, acfm 656,405.4 652,467.9 611,239.9 640,037.733 Percent Isokinetic of Sampling Rate, % F-Factor, dscfm/MMBtu @ %O2 9751 9773 9693 9,739.000 Fw 0 0 0 0.000 Fc 0 0 0 0.000



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### Valmont Unit 5 2010 HAP ICR 6/17/2010 Emissions Summary

Process Run Data 

### Location: Stack - Method 26A Compound: Hydrogen Chloride Average RunNumber 2 3 4 Mass_mg 0.7475 0.7756 0.7518 0.758 lb/mmBtuO2 2.14E-04 2.11E-04 2.08E-04 0.000 

### Compound: Hydrogen Fluoride Average RunNumber 2 3 4 Mass_mg 0.2527 0.2622 0.266 0.260 lb/mmBtuO2 7.24E-05 7.14E-05 7.36E-05 0.000



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### Valmont Unit 5 2010 HAP ICR 6/17/2010 Process Run Data

APCD Run Data

Process Lab Run Data 

### Run Name Value UOM Comments Target Value 1 Heat Input 2065.7 MMBtu/hr 0 

### 1 Bituminous Coal Feed Rate 165.04 KPPH 0 1 Gross Load 193.69 GMW 170 1 Main Steam Flow 1312.4 KPPH 0 

### 1 SO2 Control Setpoint 0.12 lb/MMBtu 0.12 1 Total Slurry Flow 136.66 GPM 0 1 SDA Pressure Drop 1.62 "W.C. 0 

### 2 Heat Input 2058.0 MMBtu/hr 0 2 Bituminous Coal Feed Rate 166.08 KPPH 0 2 Gross Load 192.68 GMW 170 

### 2 Main Steam Flow 1305.1 KPPH 0 2 SO2 Control Setpoint 0.12 lb/MMBtu 0.12 2 Total Slurry Flow 127.53 GPM 0 

### 2 SDA Pressure Drop 1.58 "W.C. 0 3 Heat Input 2057.6 MMBtu/hr 0 3 Bituminous Coal Feed Rate 165.62 KPPH 0 

### 3 Gross Load 192.81 GMW 170 3 Main Steam Flow 1305 KPPH 0 3 SO2 Control Setpoint 0.12 lb/MMBtu 0.12 

### 3 Total Slurry Flow 133.28 GPM 0 3 SDA Pressure Drop 1.61 "W.C. 0 1 Heat Input 0 Million Btus/million BTU using O2 0

Run Name Value UOM Comments Target Value 

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

### 1 DRY SCRUBBER 0 0 1 FABRIC FILTER 0 0



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### Valmont Unit 5 2010 HAP ICR 6/17/2010 Sampling / Stack Data Results Detail 

### LocationStack - Method 26A Average Run Number 2 3 4 Test Date 3/3/2010 3/4/2010 3/4/2010 Run Start Time 1:00:00 PM8:33:00 AM12:07:00 PM Run Finish Time 4:00:00 PM11:33:00 AM 3:07:00 PM 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 24.63 24.63 24.63 24.630 Average Orifice Meter Differential, inches H2O 2.00 2.00 2.00 2.000 Dry Gas Meter Volume Sampled, cubic feet 142.370 140.410 143.560 142.113 Average Dry Gas Meter Temperature, °F 94.25 65.78 90.69 83.573 Dry Gas Meter Volume Sampled, dscf 112.820 117.291 114.498 114.870 Total Moisture Liquid collected, g 300.8 294.7 302.1 299.200 Volume of Water Vapor, standard cubic feet 14.16 13.87 14.22 14.083 Moisture Content of Stack Gas, % 11.15 10.57 11.05 10.923 Moisture Saturation at Stack Gas Temperature, % 52.96 53.70 56.26 54.307 Dry Mole Fraction 0.8885 0.8943 0.8895 0.891 Carbon Dioxide, % 12.1 12.2 12.2 12.167 Oxygen, % 7 6.8 6.8 6.867 Carbon Monoxide & Nitrogen, % 80.9 81 81 80.967 Fuel Factor 1.15 1.16 1.16 Dry Molecular Weight, lb/lb-Mole 30.22 30.22 30.22 30.220 Wet Molecular weight, lb/lb-Mole 28.86 28.93 28.87 28.887 Flue Gas Static Pressure, inches of H2O -0.2 -0.2 -0.2 -0.200 Absolute Flue Gas Pressure, inches of Mercury 24.62 24.62 24.62 24.620 Average Stack Gas Temperature, °F 173.00 173.61 175.67 174.093 Average Velocity Head, inches of H2O 0.1748350570 710470.172994555

3106080.151051229

679634 0.166 Average Stack Gas Velocity, feet/second 28.34 28.17 26.39 27.633 Stack Cross-Sectional Area, square feet 386.030 386.030 386.030 386.030 Dry Volumetric Flow Rate, dry scfm 400,300.6 400,111.2 371,609.1390,673.633 Actual Wet Volumetric Flue Gas Flow Rate, acfm 656,405.4 652,467.9 611,239.9640,037.733 Percent Isokinetic of Sampling Rate, % Percent Excess Air, % 48.8 46.6 46.6 47.333 F-Factor, dscfm/MMBtu @ %O2 9751 9773 9693 9,739.000 Round Duct Diameter, inches 266.04 266.04 266.04 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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