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

Comanche Unit 2 2010 MACT 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 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Facility Information:

Comanche

2005 Lime Road

Pueblo CO 81006

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:

96OPPB133

Permitted Source ID/Name:

2 Unit 2 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:

Source is a B&W Opposed Wall Fired pulverized coal boiler with Low NOx Burners and seperated over-fire air for 

NOx control, a spray dryer absorber for SO2 control, Activated Carbon Injection for Hg control and a baghouse 

(FFDC) for particulate control.

Industry/SCC/NAIS 221112

Sampling Location Information:

Test Parameter Information:

AFS #: 101.0003.002 FRS #:

SCC / Description 10100222 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

Stack 280.92 0 0 0 12.8 6.4 4 0

Target

Parameter 

Test

Method

Number of

Test Runs

Test Run

Duration

Sample 

Location Points Comments

Stack Total Particulate OTM - 27/28 3 240 0

Stack Filterable PM2.5 OTM - 27/28 3 240 0

Stack Filterable Particulate Method 29 3 240 0

Stack Cadmium Method 29 3 240 0

Stack Beryllium Method 29 3 240 0

Regulation Description Compound Limit Unit

Colorado Operating Permit 96OPPB133, Condition 1.1 Total Particulate 0.1 lb/million BTU 

using CO2

Friday, February 18, 2011 Page 2 of 11
Comanche Unit 2 2010 MACT 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.

Stack Chromium Method 29 3 240 0

Stack Cobalt Method 29 3 240 0

Stack Arsenic Method 29 3 240 0

Stack Antimony Method 29 3 240 0

Stack Lead Method 29 3 240 0

Stack Manganese Method 29 3 240 0

Stack Nickel Method 29 3 240 0

Stack Selenium Method 29 3 240 0

Friday, February 18, 2011 Page 3 of 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Sampling / Stack Data Results Summary

Location Stack - Method 29

Average

Run Number 1 2 3

Test Date 3/16/2010 3/17/2010 3/19/2010

Run Start Time 9:23:00 AM 6:49:00 

AM

6:40:00 AM

Run Finish Time 4:09:00 PM 1:22:00 PM 12:59:00 PM

Net Run Time, minutes

Dry Gas Meter Volume Sampled, dscf 145.974 151.857 139.791 145.874

Moisture Content of Stack Gas, % 13.47 13.40 12.10 12.990

Moisture Saturation at Stack Gas Temperature, % 53.84 58.35 50.03 54.073

Carbon Dioxide, % 12.9 12.1 12.8 12.600

Oxygen, % 6.4 7 6.7 6.700

Average Stack Gas Temperature, °F 174.56 177.92 170.69 174.390

Dry Volumetric Flow Rate, dry scfm 909,344.0 943,748.7 860,748.9 904,613.867

Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,506,125.7 1,577,661.5 1,415,737.5 1,499,841.56

7

Percent Isokinetic of Sampling Rate, %

F-Factor, dscfm/MMBtu @ %O2 9566 9552 9591 9,569.667

Fw 0 0 0 0.000

Fc 0 0 0 0.000

Friday, February 18, 2011 Page 4 of 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Location Stack - OTM - 27/28

Average

Run Number

Test Date

Run Start Time

Run Finish Time

Net Run Time, minutes

Dry Gas Meter Volume Sampled, dscf

Moisture Content of Stack Gas, %

Moisture Saturation at Stack Gas Temperature, %

Carbon Dioxide, %

Oxygen, %

Average Stack Gas Temperature, °F

Dry Volumetric Flow Rate, dry scfm

Actual Wet Volumetric Flue Gas Flow Rate, acfm

Percent Isokinetic of Sampling Rate, %

F-Factor, dscfm/MMBtu @ %O2

Fw

Fc

Friday, February 18, 2011 Page 5 of 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Emissions Summary

Location: Stack - Method 29

Compound: Antimony

Average

RunNumber 1 2 3

Mass_mg 0.002937 0.001015 0.00133 0.002

lb/mmBtuO2 6.12E-07 2.12E-07 2.96E-07 0.000

Compound: Arsenic

Average

RunNumber 1 2 3

Mass_mg 0.001613 0.00175 0.00186 0.002

lb/mmBtuO2 3.36E-07 3.65E-07 4.14E-07 0.000

Compound: Beryllium

Average

RunNumber 1 2 3

Mass_mg 0.000138 0.000128 0.000165 0.000

lb/mmBtuO2 2.87E-08 2.67E-08 3.67E-08 0.000

Compound: Cadmium

Average

RunNumber 1 2 3

Mass_mg 0.000459 0.000286 0.000455 0.000

lb/mmBtuO2 9.56E-08 5.96E-08 1.01E-07 0.000

Compound: Chromium

Average

RunNumber 1 2 3

Mass_mg 0.007917 0.007323 0.005876 0.007

lb/mmBtuO2 1.65E-06 1.53E-06 1.31E-06 0.000

Compound: Cobalt

Average

RunNumber 1 2 3

Mass_mg 0.00158 0.00153 0.00115 0.001

lb/mmBtuO2 3.29E-07 3.19E-07 2.56E-07 0.000

Compound: Filterable Particulate

Average

RunNumber 1 2 3

Mass_mg 6.5 5.2 5.3 5.667

lb/mmBtuO2 1.35E-03 1.08E-03 1.18E-03 0.001

Compound: Lead

Average

RunNumber 1 2 3

Mass_mg 0.003185 0.003039 0.003349 0.003

lb/mmBtuO2 6.63E-07 6.34E-07 7.46E-07 0.000

Compound: Manganese

Average

Friday, February 18, 2011 Page 6 of 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Process Run Data

RunNumber 1 2 3

Mass_mg 0.00575 0.00568 0.006307 0.006

lb/mmBtuO2 1.20E-06 1.18E-06 1.40E-06 0.000

Compound: Nickel

Average

RunNumber 1 2 3

Mass_mg 0.001631 0.002355 0.002097 0.002

lb/mmBtuO2 3.40E-07 4.91E-07 4.67E-07 0.000

Compound: Selenium

Average

RunNumber 1 2 3

Mass_mg 0.000785 0.000976 0.00122 0.001

lb/mmBtuO2 1.63E-07 2.04E-07 2.72E-07 0.000

Location: Stack - OTM - 27/28

Compound: Filterable PM2.5

Average

RunNumber 1 2 3

Mass_mg 2.8 2.2 0.9 1.967

lb/mmBtuO2 6.43E-04 5.48E-04 2.10E-04 0.000

Compound: Total Particulate

Average

RunNumber 1 2 3

Mass_mg 167 19.1 30.5 72.200

lb/mmBtuO2 3.84E-02 4.75E-03 7.12E-03 0.017

Friday, February 18, 2011 Page 7 of 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Process Run Data

APCD Run Data

Process Lab Run Data

Run Name Value UOM Comments

Target

Value

1 Heat Input Million Btus/million BTU using CO2 375.7 0

1 Gross load 363.29 MW

1 Spray dryer absorber pressure drop 1.44 " wc

1 Spray dryer absorber slurry flow 282.1 gpm

1 Main Steam Flow 2715.8 KPPH 0

1 Heat Input 3403.1 MMBtu/hr 0

1 Flue Gas Flow Rate 53428 KSCFH 0

1 SO2 Control Setpoint 0.04 lb/MMBtu 0.1

2 Heat Input Million Btus/million BTU using CO2 368.88 0

2 Gross load 361.68 MW

2 Spray dryer absorber pressure drop 1.45 " wc

2 Spray dryer absorber slurry flow 278.6 gpm

2 Main Steam Flow 2704.9 KPPH 0

2 Heat Input 3361.7 MMBtu/hr 0

2 Flue Gas Flow Rate 54359 KSCFH 0

2 SO2 Control Setpoint 0.04 lb/MMBtu 0.1

3 Heat Input Million Btus/million BTU using CO2 355.16 0

3 Gross load 332.69 MW

3 Spray dryer absorber pressure drop 1.2 " wc

3 Spray dryer absorber slurry flow 180.14 gpm

3 Main Steam Flow 2482.4 KPPH 0

3 Heat Input 3078 MMBtu/hr 0

3 Flue Gas Flow Rate 49425 KSCFH 0

3 SO2 Control Setpoint 0.04 lb/MMBtu 0.1

1 Hg Injection Feedrate 65.56 lb/hr 0

Run Name Value UOM Comments

Target

Value

1 LOW NOX BURNERS 0 0

1 OVERFIRE AIR 0 0

1 DRY SCRUBBER 0

1 ACTIVATED CARBON ADSORPTION 0 0

1 BAGHOUSE 0 0

Friday, February 18, 2011 Page 8 of 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Process Lab Run Data

Friday, February 18, 2011 Page 9 of 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Sampling / Stack Data Results Detail

Location Stack - Method 29

Average

Run Number 1 2 3

Test Date 3/16/2010 3/17/2010 3/19/2010

Run Start Time 9:23:00 AM 6:49:00 AM 6:40:00 AM

Run Finish Time 4:09:00 PM 1:22:00 PM 12:59:00 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 0.9888 0.9888 0.9888 0.989

Barometric Pressure, inches of Mercury 25.13 25.01 24.76 24.967

Average Orifice Meter Differential, inches H2O 0.67 0.74 0.61 0.673

Dry Gas Meter Volume Sampled, cubic feet 178.160 186.520 170.680 178.453

Average Dry Gas Meter Temperature, °F 76.24 77.19 68.47 73.967

Dry Gas Meter Volume Sampled, dscf 145.974 151.857 139.791 145.874

Total Moisture Liquid collected, g 482.6 499.1 408.8 463.500

Volume of Water Vapor, standard cubic feet 22.72 23.49 19.24 21.817

Moisture Content of Stack Gas, % 13.47 13.40 12.10 12.990

Moisture Saturation at Stack Gas Temperature, % 53.84 58.35 50.03 54.073

Dry Mole Fraction 0.8653 0.866 0.879 0.870

Carbon Dioxide, % 12.9 12.1 12.8 12.600

Oxygen, % 6.4 7 6.7 6.700

Carbon Monoxide & Nitrogen, % 80.7 80.9 80.5 80.700

Fuel Factor 1.12 1.15 1.11

Dry Molecular Weight, lb/lb-Mole 30.32 30.22 30.32 30.287

Wet Molecular weight, lb/lb-Mole 28.66 28.58 28.83 28.690

Flue Gas Static Pressure, inches of H2O -0.6 -0.6 -0.6 -0.600

Absolute Flue Gas Pressure, inches of Mercury 25.09 24.97 24.72 24.927

Average Stack Gas Temperature, °F 174.56 177.92 170.69 174.390

Average Velocity Head, inches of H2O 0.7473842490

05739

0.809707161

692999

0.658445131

34035

0.739

Average Stack Gas Velocity, feet/second 58.32 61.09 54.82 58.077

Stack Cross-Sectional Area, square feet 430.420 430.420 430.420 430.420

Dry Volumetric Flow Rate, dry scfm 909,344.0 943,748.7 860,748.9 904,613.867

Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,506,125.7 1,577,661.5 1,415,737.5 1,499,841.5

67

Percent Isokinetic of Sampling Rate, %

Percent Excess Air, % 42.9 48.8 46.0 45.900

F-Factor, dscfm/MMBtu @ %O2 9566 9552 9591 9,569.667

Round Duct Diameter, inches 280.92 280.92 280.92

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 10 of 11
Comanche Unit 2 2010 MACT ICR

6/18/2010

Location Stack - OTM - 27/28

Average

Run Number

Test Date

Run Start Time

Run Finish Time

Net Traversing Points

Net Run Time, minutes

Nozzle Diameter, inches

Pitot Tube Coefficient

Dry Gas Meter Calibration Factor

Barometric Pressure, inches of Mercury

Average Orifice Meter Differential, inches H2O

Dry Gas Meter Volume Sampled, cubic feet

Average Dry Gas Meter Temperature, °F

Dry Gas Meter Volume Sampled, dscf

Total Moisture Liquid collected, g

Volume of Water Vapor, standard cubic feet

Moisture Content of Stack Gas, %

Moisture Saturation at Stack Gas Temperature, %

Dry Mole Fraction

Carbon Dioxide, %

Oxygen, %

Carbon Monoxide & Nitrogen, %

Fuel Factor

Dry Molecular Weight, lb/lb-Mole

Wet Molecular weight, lb/lb-Mole

Flue Gas Static Pressure, inches of H2O

Absolute Flue Gas Pressure, inches of Mercury

Average Stack Gas Temperature, °F

Average Velocity Head, inches of H2O

Average Stack Gas Velocity, feet/second

Stack Cross-Sectional Area, square feet

Dry Volumetric Flow Rate, dry scfm

Actual Wet Volumetric Flue Gas Flow Rate, acfm

Percent Isokinetic of Sampling Rate, %

Percent Excess Air, %

F-Factor, dscfm/MMBtu @ %O2

Round Duct Diameter, inches

Rectangular Duct Width, inches

Rectangular Duct Length, inches

Fw

Fc

Friday, February 18, 2011 Page 11 of 11