Name:

Title:

Company:

Sign Date:

Name:

Title:

Company:

Sign Date:

Permitted Facility Representative / Date Testing Company Representative / Date

Midwest Generation Will County Unit 4

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.

Tuesday, February 08, 2011 Page 1 of 20
Midwest Generation Will County Unit 4

Facility Information:

Midwest Generation - Will County Unit 4

529 E. 135th Street

Romeoville IL 60446

Contact: Scott B. Miller

Phone: 630-771-7859

Fax: 312-788-5219

Email: smiller@mwgen.com

Testing Company:

Platt Environmental Services, Inc.

1520 Kensington Road

Suite 204

Oak Brook IL 60523-2141

Contact:Eric L. Ehlers

Phone: 630-699-7690

Fax: 630-521-9494

Email: eehlers@plattenv.com

Air Permit Number:

95090080

Permitted Source ID/Name:

884 Will County

Permitted Maximum Process Rate:

5016 mmBtu/hr

Max. Normal Operation Process Rate:

5016 mmBtu/hr

Target Process Test Rate

4412 mmBtu/hr

Description of the source (including control equipment). Please see the attachments for source or

 process flow diagram:

Unit 4 is a tangentially fired boiler rated at 551 MW and 5,016 mmBtu/hr. The steam generator is capable of 

delivering 3,900,000 pounds of steam per hour. The outlet header pressure is 2,490 psig at 1005 degrees F with feed 

water at 533 degrees F. The steam generator will reheat 2,771,100 pounds of steam per hour for 608 degrees F and 

475 psia to 1005 degrees F and 447 psia. Unit 4 is a twin furnace and includes an economizer, four regenerativeair 

heaters, eight coal feeders and pulverizers, oil ignitors, superheat and reheat temperature control. Unit 4 burns 

primarily pulverized coal. Additionally, Unit 4 utilizes fuel oil ignition during startup and for flame stabilization. 

Heat produced in the boiler converts water to high-pressure steam in the boiler. Steam is forced through the turbine, 

causing the turbine blades and shaft to rotate. The turbine shaft turns the attached generator shaft, which produces 

electricity. The pollution controls consist of low NOx burners and overfire air for NOx, low sulfur coal for SO2, a 

cold ESP for PM and activated carbon injection for mercury.

Industry/SCC/NAIS 221112

Sampling Location Information:

Test Parameter Information:

AFS #: 17-197-0166 FRS #: 110000432933

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 198 0 0 0 0 0 4 12

Target

Parameter 

Test

Method

Number of

Test Runs

Test Run

Duration

Sample 

Location Points Comments

Regulation Description Compound Limit Unit

0

Tuesday, February 08, 2011 Page 2 of 20
Midwest Generation Will County Unit 4

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.

Target

Parameter 

Test

Method

Number of

Test Runs

Test Run

Duration

Sample 

Location Points Comments

Stack Mercury 30B-Hg 3 120 0

Stack % H2O Method 1 - 4 3 120 0

Stack Flowrate Method 1 - 4 3 120 0

Stack Total PM2.5 OTM - 27/28 3 360 0

Stack Filterable Particulate OTM - 27/28 3 360 0

Organic Condensible 

Particulate

Stack OTM - 27/28 3 360 0

Stack Total Particulate OTM - 27/28 3 360 0

Inorganic (Aqueous) 

Condensible Part.

Stack OTM - 27/28 3 360 0

Stack Filterable PM2.5 OTM - 27/28 3 360 0

Stack Arsenic 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 Antimony Method 29 3 240 0

Stack Cobalt 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 Lead Method 29 3 240 0

Stack Co2 Method 3A CO2 3 360 0

Stack O2 Method 3A O2 3 360 0

Tuesday, February 08, 2011 Page 3 of 20
Midwest Generation Will County Unit 4

Sampling / Stack Data Results Summary

Location Stack - Method 29

Average

Run Number MM5/29-1 MM5/29-2 MM5/29-3

Test Date 6/30/2010 7/1/2010 7/2/2010

Run Start Time 8:25:00 AM 8:30:00 

AM

8:00:00 AM

Run Finish Time 12:40:00 PM 12:45:00 

PM

12:13:00 PM

Net Run Time, minutes 240 240 240

Dry Gas Meter Volume Sampled, dscf 141.671 142.266 140.989 141.642

Moisture Content of Stack Gas, % 11.35 10.36 11.78 11.163

Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000

Carbon Dioxide, % 14.3 14.5 14.2 14.333

Oxygen, % 5.3 5.1 5.2 5.200

Average Stack Gas Temperature, °F 318.42 320.42 320.58 319.807

Dry Volumetric Flow Rate, dry scfm 1,138,942.4 1,161,773.3 1,138,110.9 1,146,275.53

3

Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,954,189.4 1,973,690.3 1,971,124.4 1,966,334.70

0

Percent Isokinetic of Sampling Rate, % 102.2 100.6 101.8 101.533

F-Factor, dscfm/MMBtu @ %O2 8525 9802 8705 9,010.667

Fw 0 0 0 0.000

Fc 1768 1886 1775 1,809.667

Location Stack - Method 3A CO2

Average

Run Number

Test Date

Run Start Time

Run Finish Time

Carbon Dioxide, %

Oxygen, %

Dry Volumetric Flow Rate, dry scfm

F-Factor, dscfm/MMBtu @ %O2

Moisture, %

Fuel Type

Fw

Fc

Tuesday, February 08, 2011 Page 4 of 20
Midwest Generation Will County Unit 4

Location Stack - Method 3A O2

Average

Run Number

Test Date

Run Start Time

Run Finish Time

Carbon Dioxide, %

Oxygen, %

Dry Volumetric Flow Rate, dry scfm

F-Factor, dscfm/MMBtu @ %O2

Moisture, %

Fuel Type

Fw

Fc

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

Tuesday, February 08, 2011 Page 5 of 20
Midwest Generation Will County Unit 4

Emissions Summary

Location: Stack - Method 29

Compound: Antimony

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.004 0.004 0.004 0.004

lb/mmBtuO2 7.11E-07 8.04E-07 7.25E-07 0.000

Compound: Arsenic

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.0065 0.0055 0.0056 0.006

lb/mmBtuO2 1.16E-06 1.11E-06 1.01E-06 0.000

Compound: Beryllium

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.001 0.001 0.001 0.001

lb/mmBtuO2 1.78E-07 2.01E-07 1.81E-07 0.000

Compound: Cadmium

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.0011 0.001 0.001 0.001

lb/mmBtuO2 1.96E-07 2.01E-07 1.81E-07 0.000

Compound: Chromium

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.01401 0.01821 0.01991 0.017

lb/mmBtuO2 2.49E-06 3.66E-06 3.61E-06 0.000

Compound: Cobalt

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.00491 0.00392 0.00347 0.004

lb/mmBtuO2 8.73E-07 7.88E-07 6.29E-07 0.000

Compound: Filterable Particulate

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 138.3 131.6 102.1 124.000

lb/mmBtuO2 2.46E-02 2.64E-02 1.85E-02 0.023

Compound: Lead

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.01401 0.01031 0.01213 0.012

lb/mmBtuO2 2.49E-06 2.07E-06 2.20E-06 0.000

Compound: Manganese

Average

Tuesday, February 08, 2011 Page 6 of 20
Midwest Generation Will County Unit 4

Process Run Data

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.03457 0.02903 0.03177 0.032

lb/mmBtuO2 6.14E-06 5.83E-06 5.76E-06 0.000

Compound: Nickel

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.03314 0.01994 0.02784 0.027

lb/mmBtuO2 5.89E-06 4.01E-06 5.04E-06 0.000

Compound: Selenium

Average

RunNumber MM5/29-1 MM5/29-2 MM5/29-3

Mass_mg 0.0152 0.0146 0.0213 0.017

lb/mmBtuO2 2.70E-06 2.93E-06 3.86E-06 0.000

Location: Stack - OTM - 27/28

Compound: Filterable Particulate

Average

RunNumber MOTM27/OTM28-1 MOTM27/OTM28-2 MOTM27/OTM28-3

Mass_mg 231.8 142.3 106 160.033

lb/mmBtuO2 4.81E-02 3.31E-02 2.23E-02 0.035

Compound: Filterable PM2.5

Average

RunNumber MOTM27/OTM28-1 MOTM27/OTM28-2 MOTM27/OTM28-3

Mass_mg 56.7 51.8 68.5 59.000

lb/mmBtuO2 1.18E-02 1.20E-02 1.44E-02 0.013

Compound: Inorganic (Aqueous) Condensible Pa

Average

RunNumber MOTM27/OTM28-1 MOTM27/OTM28-2 MOTM27/OTM28-3

Mass_mg 14 21.4 36.9 24.100

lb/mmBtuO2 2.91E-03 4.97E-03 7.78E-03 0.005

Compound: Organic Condensible Particulate

Average

RunNumber MOTM27/OTM28-1 MOTM27/OTM28-2 MOTM27/OTM28-3

Mass_mg 1 0.5 0.4 0.633

lb/mmBtuO2 2.08E-04 1.16E-04 8.43E-05 0.000

Compound: Total Particulate

Average

RunNumber MOTM27/OTM28-1 MOTM27/OTM28-2 MOTM27/OTM28-3

Mass_mg 246.8 164.2 143.3 184.767

lb/mmBtuO2 5.12E-02 3.81E-02 3.02E-02 0.040

Compound: Total PM2.5

Average

RunNumber MOTM27/OTM28-1 MOTM27/OTM28-2 MOTM27/OTM28-3

Mass_mg 71.7 73.7 105.8 83.733

lb/mmBtuO2 1.49E-02 1.71E-02 2.23E-02 0.018

Tuesday, February 08, 2011 Page 7 of 20
Midwest Generation Will County Unit 4

Process Run Data

Run Name Value UOM Comments

Target

Value

1 Steam Output 3751.0 1000lb steam/hr Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Steam Output 3739.7 1000lb steam/hr Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Steam Output 3677.5 1000lb steam/hr Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Steam Output 3751.5 1000lb steam/hr Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Steam Output 3748.0 1000lb steam/hr Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Steam Output 3692.9 1000lb steam/hr Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Steam Output 3760.7 1000lb steam/hr Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Steam Output 3762.5 1000lb steam/hr Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Steam Output 3696.2 1000lb steam/hr Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Unit Gross Electric Generation 539.02 MW Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Unit Gross Electric Generation 538.92 MW Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Unit Gross Electric Generation 527.70 MW Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Unit Gross Electric Generation 538.93 MW Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Unit Gross Electric Generation 539.24 MW Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Unit Gross Electric Generation 527.75 MW Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Unit Gross Electric Generation 538.95 MW Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Unit Gross Electric Generation 538.84 MW Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Unit Gross Electric Generation 527.71 MW Test 3, 7/2/10, 

M30B, 8:00-10:00

0

Tuesday, February 08, 2011 Page 8 of 20
Midwest Generation Will County Unit 4

1 Unit Net Electric Generation 509.56 MWh Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Unit Net Electric Generation 509.56 MWh Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Unit Net Electric Generation 499.5 MWh Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Unit Net Electric Generation 509.56 MWh Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Unit Net Electric Generation 509.53 MWh Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Unit Net Electric Generation 499.56 MWh Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Unit Net Electric Generation 509.53 MWh Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Unit Net Electric Generation 509.57 MWh Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Unit Net Electric Generation 499.71 MWh Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Sorbent Type and Sorbent Injection Rate 596.62 lbs/hr Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Sorbent Type and Sorbent Injection Rate 587.97 lbs/hr Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Sorbent Type and Sorbent Injection Rate 578.76 lbs/hr Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Sorbent Type and Sorbent Injection Rate 594.11 lbs/hr Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Sorbent Type and Sorbent Injection Rate 586.40 lbs/hr Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Sorbent Type and Sorbent Injection Rate 577.57 lbs/hr Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Sorbent Type and Sorbent Injection Rate 590.5 lbs/hr Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Sorbent Type and Sorbent Injection Rate 585.5 lbs/hr Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Sorbent Type and Sorbent Injection Rate 575.30 lbs/hr Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Flue Gas Sampling Point Temperature 312.9 Deg F Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

Tuesday, February 08, 2011 Page 9 of 20
Midwest Generation Will County Unit 4

2 Flue Gas Sampling Point Temperature 315.9 Deg F Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Flue Gas Sampling Point Temperature 315 Deg F Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Flue Gas Sampling Point Temperature 311.1 Deg F Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Flue Gas Sampling Point Temperature 314.1 Deg F Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Flue Gas Sampling Point Temperature 313.9 Deg F Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Flue Gas Sampling Point Temperature 308.6 Deg F Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Flue Gas Sampling Point Temperature 311.8 Deg F Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Flue Gas Sampling Point Temperature 311.5 Deg F Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Average Heat Input 5280.5 mmBtu/hr Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Average Heat Input 5305.3 mmBtu/hr Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Average Heat Input 5314.1 mmBtu/hr Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:27

0

4 Average Heat Input 5312.6 mmBtu/hr Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Average Heat Input 5324.1 mmBtu/hr Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Average Heat Input 5142.8 mmBtu/hr Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Average Heat Input 5320.4 mmBtu/hr Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Average Heat Input 5330.8 mmBtu/hr Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Average Heat Input 5158.9 mmBtu/hr Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Flue Gas Carbon Dioxide Content 12.77 % Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Flue Gas Carbon Dioxide Content 13.03 % Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

Tuesday, February 08, 2011 Page 10 of 20
Midwest Generation Will County Unit 4

3 Flue Gas Carbon Dioxide Content 12.79 % Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Flue Gas Carbon Dioxide Content 12.84 % Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Flue Gas Carbon Dioxide Content 13.04 % Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Flue Gas Carbon Dioxide Content 12.81 % Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Flue Gas Carbon Dioxide Content 12.91 % Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Flue Gas Carbon Dioxide Content 13.04 % Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Flue Gas Carbon Dioxide Content 12.84 % Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Flue Gas Oxygen Content 6.96 % Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Flue Gas Oxygen Content 6.67 % Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Flue Gas Oxygen Content 6.93 % Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Flue Gas Oxygen Content 6.88 % Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Flue Gas Oxygen Content 6.67 % Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Flue Gas Oxygen Content 6.92 % Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Flue Gas Oxygen Content 6.8 % Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Flue Gas Oxygen Content 6.67 % Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Flue Gas Oxygen Content 6.88 % Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Flue Gas Flowrate 1E+06 dscfm Test 1, 

6/30/10,OTM27/O

TM28, 8:25-14:47

0

2 Flue Gas Flowrate 1E+06 dscfm Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Flue Gas Flowrate 1E+06 dscfm Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:27

0

4 Flue Gas Flowrate 1E+06 dscfm Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

Tuesday, February 08, 2011 Page 11 of 20
Midwest Generation Will County Unit 4

5 Flue Gas Flowrate 1E+06 dscfm Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Flue Gas Flowrate 1E+06 dscfm Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Flue Gas Flowrate 1E+06 dscfm Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Flue Gas Flowrate 1E+06 dscfm Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Flue Gas Flowrate 1E+06 dscfm Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Coal Firing Rate 616.9 klbs/hr Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Coal Firing Rate 619.8 klbs/hr Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Coal Firing Rate 599.9 klbs/hr Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Coal Firing Rate 616.9 klbs/hr Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Coal Firing Rate 622 klbs/hr Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Coal Firing Rate 600.8 klbs/hr Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Coal Firing Rate 621.6 klbs/hr Test 1, 6/30/10, 

M30B, 8:25-10:25

0

8 Coal Firing Rate 622.8 klbs/hr Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Coal Firing Rate 602.7 klbs/hr Test 3, 7/2/10, 

M30B, 8:00-10:00

0

1 Flue Gas Moisture Content 11.2 % Test 1, 6/30/10, 

OTM27/OTM28, 

8:25-14:47

0

2 Flue Gas Moisture Content 11.2 % Test 2, 7/1/10, 

OTM27/OTM28, 

8:30-14:42

0

3 Flue Gas Moisture Content 11.2 % Test 3, 7/2/10, 

OTM27/OTM28, 

8:00-14:11

0

4 Flue Gas Moisture Content 11.2 % Test 1, 6/30/10, 

M5/29, 8:25-12:40

0

5 Flue Gas Moisture Content 11.2 % Test 2, 7/1/10, 

M5/29, 8:30-12:45

0

6 Flue Gas Moisture Content 11.2 % Test 3, 7/2/10, 

M5/29, 8:00-12:13

0

7 Flue Gas Moisture Content 0 % 0

Tuesday, February 08, 2011 Page 12 of 20
Midwest Generation Will County Unit 4

8 Flue Gas Moisture Content 11.2 % Test 2, 7/1/10, 

M30B, 8:30-10:30

0

9 Flue Gas Moisture Content 0 % 0

1 Synfuel Firing Rate 0 0

2 Synfuel Firing Rate 0 0

3 Synfuel Firing Rate 0 0

4 Synfuel Firing Rate 0 0

5 Synfuel Firing Rate 0 0

6 Synfuel Firing Rate 0 0

7 Synfuel Firing Rate 0 0

8 Synfuel Firing Rate 0 0

9 Synfuel Firing Rate 0 0

1 Petroleum Coke Firing Rate 0 0

2 Petroleum Coke Firing Rate 0 0

3 Petroleum Coke Firing Rate 0 0

4 Petroleum Coke Firing Rate 0 0

5 Petroleum Coke Firing Rate 0 0

6 Petroleum Coke Firing Rate 0 0

7 Petroleum Coke Firing Rate 0 0

8 Petroleum Coke Firing Rate 0 0

9 Petroleum Coke Firing Rate 0 0

1 Coal Gas Firing Rate 0 0

2 Coal Gas Firing Rate 0 0

3 Coal Gas Firing Rate 0 0

4 Coal Gas Firing Rate 0 0

5 Coal Gas Firing Rate 0 0

6 Coal Gas Firing Rate 0 0

7 Coal Gas Firing Rate 0 0

8 Coal Gas Firing Rate 0 0

9 Coal Gas Firing Rate 0 0

1 Fuel Oil Firing Rate 0 0

2 Fuel Oil Firing Rate 0 0

3 Fuel Oil Firing Rate 0 0

4 Fuel Oil Firing Rate 0 0

5 Fuel Oil Firing Rate 0 0

6 Fuel Oil Firing Rate 0 0

Tuesday, February 08, 2011 Page 13 of 20
Midwest Generation Will County Unit 4

7 Fuel Oil Firing Rate 0 0

8 Fuel Oil Firing Rate 0 0

9 Fuel Oil Firing Rate 0 0

1 Pressure Drop Across FGD (if applicable) 0 in H2O 0

2 Pressure Drop Across FGD (if applicable) 0 in H2O 0

3 Pressure Drop Across FGD (if applicable) 0 in H2O 0

4 Pressure Drop Across FGD (if applicable) 0 in H2O 0

5 Pressure Drop Across FGD (if applicable) 0 in H2O 0

6 Pressure Drop Across FGD (if applicable) 0 in H2O 0

7 Pressure Drop Across FGD (if applicable) 0 in H2O 0

8 Pressure Drop Across FGD (if applicable) 0 in H2O 0

9 Pressure Drop Across FGD (if applicable) 0 in H2O 0

1 FGD Scrubber Liquor Flow Rate 0 gal/min 0

2 FGD Scrubber Liquor Flow Rate 0 gal/min 0

3 FGD Scrubber Liquor Flow Rate 0 gal/min 0

4 FGD Scrubber Liquor Flow Rate 0 gal/min 0

5 FGD Scrubber Liquor Flow Rate 0 gal/min 0

6 FGD Scrubber Liquor Flow Rate 0 gal/min 0

7 FGD Scrubber Liquor Flow Rate 0 gal/min 0

8 FGD Scrubber Liquor Flow Rate 0 gal/min 0

9 FGD Scrubber Liquor Flow Rate 0 gal/min 0

1 Flue Gas Pressure 0 atm 0

2 Flue Gas Pressure 0 atm 0

3 Flue Gas Pressure 0 atm 0

4 Flue Gas Pressure 0 atm 0

5 Flue Gas Pressure 0 atm 0

6 Flue Gas Pressure 0 atm 0

7 Flue Gas Pressure 0 atm 0

8 Flue Gas Pressure 0 atm 0

9 Flue Gas Pressure 0 atm 0

1 Standard Pressure 0 atm 0

2 Standard Pressure 0 atm 0

3 Standard Pressure 0 atm 0

4 Standard Pressure 0 atm 0

5 Standard Pressure 0 atm 0

6 Standard Pressure 0 atm 0

Tuesday, February 08, 2011 Page 14 of 20
Midwest Generation Will County Unit 4

APCD Run Data

7 Standard Pressure 0 atm 0

8 Standard Pressure 0 atm 0

9 Standard Pressure 0 atm 0

1 Standard Temp 0 Deg F 0

2 Standard Temp 0 Deg F 0

3 Standard Temp 0 Deg F 0

4 Standard Temp 0 Deg F 0

5 Standard Temp 0 Deg F 0

6 Standard Temp 0 Deg F 0

7 Standard Temp 0 Deg F 0

8 Standard Temp 0 Deg F 0

9 Standard Temp 0 Deg F 0

1 FGD Scrubber Liquor pH 0 pH 0

2 FGD Scrubber Liquor pH 0 pH 0

3 FGD Scrubber Liquor pH 0 pH 0

4 FGD Scrubber Liquor pH 0 pH 0

5 FGD Scrubber Liquor pH 0 pH 0

6 FGD Scrubber Liquor pH 0 pH 0

7 FGD Scrubber Liquor pH 0 pH 0

8 FGD Scrubber Liquor pH 0 pH 0

9 FGD Scrubber Liquor pH 0 pH 0

1 Subbituminous Coal Burned 0 1000 Tons/hr 0

Run Name Value UOM Comments

Target

Value

1 ELECTROSTATIC PRECIPITATOR 0 0

2 ELECTROSTATIC PRECIPITATOR 0 0

3 ELECTROSTATIC PRECIPITATOR 0 0

1 LOW NOX BURNERS 0 0

2 LOW NOX BURNERS 0 0

3 LOW NOX BURNERS 0 0

1 OVERFIRE AIR 0 0

2 OVERFIRE AIR 0 0

3 OVERFIRE AIR 0 0

1 ACTIVATED CARBON ADSORPTION 5 lbs/macf 0

Tuesday, February 08, 2011 Page 15 of 20
Midwest Generation Will County Unit 4

Process Lab Run Data

2 ACTIVATED CARBON ADSORPTION 5 lbs/macf 0

3 ACTIVATED CARBON ADSORPTION 5 lbs/macf 0

1 0 0

Run Name Value UOM Comments

1 Fuel Higher Heating Value 0 Btu/lb

1 Fuel Moisture 0 %

1 Fuel Mercury Content 0 ppm

1 Fuel Cadmium Content 0 ppm

1 Ultimate/Proximate Analysis 0

1 Fuel Nickel Content 0 ppm

1 Fuel Arsenic Content 0 ppm

1 Fuel Chromium Content 0 ppm

1 Fuel Beryllium Content 0 ppm

1 Fuel Lead Content 0 ppm

1 Fuel Manganese Content 0 ppm

1 Fuel Chlorine Content 0 ppm

1 Fuel Fluorine Content 0 ppm

Tuesday, February 08, 2011 Page 16 of 20
Midwest Generation Will County Unit 4

Sampling / Stack Data Results Detail

Location Stack - Method 29

Average

Run Number MM5/29-1 MM5/29-2 MM5/29-3

Test Date 6/30/2010 7/1/2010 7/2/2010

Run Start Time 8:25:00 AM 8:30:00 AM 8:00:00 AM

Run Finish Time 12:40:00 PM 12:45:00 PM 12:13:00 PM

Net Traversing Points 16 16 16

Net Run Time, minutes 240 240 240

Nozzle Diameter, inches 0.141 0.141 0.141 0.141

Pitot Tube Coefficient 0.84 0.84 0.84 0.840

Dry Gas Meter Calibration Factor 1.003 1.003 1.003 1.003

Barometric Pressure, inches of Mercury 29.05 29.09 29 29.047

Average Orifice Meter Differential, inches H2O 1.13 1.12 1.11 1.120

Dry Gas Meter Volume Sampled, cubic feet 148.956 148.691 149.276 148.974

Average Dry Gas Meter Temperature, °F 82.17 79.67 85.00 82.280

Dry Gas Meter Volume Sampled, dscf 141.671 142.266 140.989 141.642

Total Moisture Liquid collected, g 385.2 349.4 399.8 378.133

Volume of Water Vapor, standard cubic feet 18.13 16.45 18.82 17.800

Moisture Content of Stack Gas, % 11.35 10.36 11.78 11.163

Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000

Dry Mole Fraction 0.8865 0.8964 0.8822 0.888

Carbon Dioxide, % 14.3 14.5 14.2 14.333

Oxygen, % 5.3 5.1 5.2 5.200

Carbon Monoxide & Nitrogen, % 80.4 80.4 80.6 80.467

Fuel Factor 1.09 1.09 1.11

Dry Molecular Weight, lb/lb-Mole 30.50 30.52 30.48 30.500

Wet Molecular weight, lb/lb-Mole 29.08 29.22 29.01 29.103

Flue Gas Static Pressure, inches of H2O -0.7 -0.7 -0.7 -0.700

Absolute Flue Gas Pressure, inches of Mercury 29.00 29.04 28.95 28.997

Average Stack Gas Temperature, °F 318.42 320.42 320.58 319.807

Average Velocity Head, inches of H2O 4.8742297211

0506

4.989732201

56733

4.924626936

20427

4.930

Average Stack Gas Velocity, feet/second 152.32 153.84 153.64 153.267

Stack Cross-Sectional Area, square feet 213.825 213.825 213.825 213.825

Dry Volumetric Flow Rate, dry scfm 1,138,942.4 1,161,773.3 1,138,110.9 1,146,275.5

33

Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,954,189.4 1,973,690.3 1,971,124.4 1,966,334.7

00

Percent Isokinetic of Sampling Rate, % 102.2 100.6 101.8 101.533

Percent Excess Air, % 33.3 31.6 32.3 32.400

F-Factor, dscfm/MMBtu @ %O2 8525 9802 8705 9,010.667

Round Duct Diameter, inches 198 198 198

Rectangular Duct Width, inches 0 0 0

Rectangular Duct Length, inches 0 0 0

Fw 0 0 0 0.000

Fc 1768 1886 1775 1,809.667

Tuesday, February 08, 2011 Page 17 of 20
Midwest Generation Will County Unit 4

Location Stack - Method 3A CO2

Average

Run Number

Test Date

Run Start Time

Run Finish Time

Carbon Dioxide, %

Oxygen, %

Fuel Factor

Dry Volumetric Flow Rate, dry scfm

F-Factor, dscfm/MMBtu @ %O2

Moisture, %

Analyzer Make

Analyzer Model

Analyzer Serial Number

Operating Range

Operating Units

No. Readings/Avg.

Calibration Set

Calibration Pre Zero Cylinder ID

Calibration Pre Zero Cylinder Instrument Response

Calibration Pre Zero Cylinder Bias

Calibration Pre Zero Cylinder Drift

Calibration Pre High Cylinder ID

Calibration Pre High Cylinder Instrument Response

Calibration Pre High Cylinder Bias

Calibration Pre High Cylinder Drift

Calibration Post Zero Cylinder ID

Calibration Post Zero Cylinder Instrument Response

Calibration Post Zero Cylinder Bias

Calibration Post Zero Cylinder Drift

Calibration Post High Cylinder ID

Calibration Post High Cylinder Instrument Response

Calibration Post High Cylinder Bias

Calibration Post High Cylinder Drift

Cavg

Cavg Units

Cgas

Cgas Units

Fuel Type

Fw

Fc

Cgasw

Cgasw Units

Tuesday, February 08, 2011 Page 18 of 20
Midwest Generation Will County Unit 4

Location Stack - Method 3A O2

Average

Run Number

Test Date

Run Start Time

Run Finish Time

Carbon Dioxide, %

Oxygen, %

Fuel Factor

Dry Volumetric Flow Rate, dry scfm

F-Factor, dscfm/MMBtu @ %O2

Moisture, %

Analyzer Make

Analyzer Model

Analyzer Serial Number

Operating Range

Operating Units

No. Readings/Avg.

Calibration Set

Calibration Pre Zero Cylinder ID

Calibration Pre Zero Cylinder Instrument Response

Calibration Pre Zero Cylinder Bias

Calibration Pre Zero Cylinder Drift

Calibration Pre High Cylinder ID

Calibration Pre High Cylinder Instrument Response

Calibration Pre High Cylinder Bias

Calibration Pre High Cylinder Drift

Calibration Post Zero Cylinder ID

Calibration Post Zero Cylinder Instrument Response

Calibration Post Zero Cylinder Bias

Calibration Post Zero Cylinder Drift

Calibration Post High Cylinder ID

Calibration Post High Cylinder Instrument Response

Calibration Post High Cylinder Bias

Calibration Post High Cylinder Drift

Cavg

Cavg Units

Cgas

Cgas Units

Fuel Type

Fw

Fc

Cgasw

Cgasw Units

Tuesday, February 08, 2011 Page 19 of 20
Midwest Generation Will County Unit 4

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

Tuesday, February 08, 2011 Page 20 of 20