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.

Friday, February 18, 2011 Page 1 of 7
Valmont Unit 5 2010 HAP ICR

6/17/2010

Facility Information:

Valmont

1800 N. 63rd Street

Boulder CO 80301

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 CO 80002

Contact: Patrick Clark

Phone: 303-670-0530

Fax: 303-670-4130

Email: pclark@airtechenv.com

Air Permit Number:

96OPBO131

Permitted Source ID/Name:

5 Unit 5 Boiler

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/NAIS 221112

Sampling Location Information:

Test Parameter Information:

AFS #: 013.0001.001 FRS #: 110000467290

SCC / Description 10100212 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 0 0 266.04 319.248 2027.2248 1 3

Target

Parameter 

Test

Method

Number of

Test Runs

Test Run

Duration

Sample 

Location Points Comments

Stack Hydrogen Fluoride Method 26A 3 180 0

Stack Hydrogen Chloride Method 26A 3 180 0

Friday, February 18, 2011 Page 2 of 7
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.

Friday, February 18, 2011 Page 3 of 7
Valmont Unit 5 2010 HAP ICR

6/17/2010

Friday, February 18, 2011 Page 4 of 7
Valmont Unit 5 2010 HAP ICR

6/17/2010

Sampling / Stack Data Results Summary

Location Stack - 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 

AM

12:07:00 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

Friday, February 18, 2011 Page 5 of 7
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

Friday, February 18, 2011 Page 6 of 7
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 Million Btus/million BTU using O2 0 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

Friday, February 18, 2011 Page 7 of 7
Valmont Unit 5 2010 HAP ICR

6/17/2010

Sampling / Stack Data Results Detail

Location Stack - 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 AM 12:07:00 PM

Run Finish Time 4:00:00 PM 11:33:00 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

71047

0.172994555

310608

0.151051229

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 400,300.6 400,111.2 371,609.1 390,673.633

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, %

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

Friday, February 18, 2011 Page 8 of 7