### Name: Matt Greek

Title: Vice President Company: RRI Energy Sign Date: Name: Carl Vineyard Title: Utility MACT Program Manager Company: Grace Consulting, Inc. Sign Date: 7/16/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

## RRI Energy, Elrama Power Plant

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.

Monday, February 14, 2011 Page 1 of 30

### RRI Energy, Elrama Power Plant

Facility Information:
Elrama Power Plant 30 Duquesne Light Way

Elrama PA 150380800 Contact:Shawn Stenlake Phone: 570-897-2140 Fax: 570-897-2110 Email: sstenlake@rrienergy.com Testing Company: Grace Consulting, Inc.
510 Dickson St
PO Box 58 Wellington OH44090 Contact:Carl Vineyard Phone: 440-647-6672 Fax: 440-647-6673 Email: carlvineyard@gcitest.com

Air Permit Number: 63-0014 Permitted Source ID/Name: Elrama Power Plant Units 1, 2, 3 and 4 ElramaCS Permitted Maximum Process Rate: 1921 mmBtu/hr Max. Normal Operation Process Rate: 1900 mmBtu/hr Target Process Test Rate 1900 mmBtu/hr

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: Unit 3 and 4 are pulverized Coal Boilers with Mechanical collectors and Electrostatic Precipitators for Particulate control and ducted to a common Venturi-type scrubber for additional particulate control and SO2 control. Exhaust gases are discharged into the atmospere through a single exhaust stack. Industry/SCC/NAIS 221112

Sampling Location Information:

Test Parameter Information: AFS #: 4212500012 FRS #: 110000582995

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 Common Stack 327.25 2760 1560 4 0 24 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Carbon Monoxide Method 10 3 120 0 Common StackTotal organic compounds

(TOC) as Propane Method 25A 6 60 0 Common Stack

Hydrogen Chloride Method 26A 3 180 0 Common StackHydrogen Fluoride Method 26A 3 180 0 Common StackFilterable Particulate Method 26A 3 180 0 Common Stack Regulation Description Compound Limit Unit TVOP-63-0014 0



### Monday, February 14, 2011 Page 2 of 30

### RRI Energy, Elrama Power Plant

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. Method 033 used for HCN with one hour test runs and 6N NaOH per EPA Directions.

Beryllium Method 29 3 240 0 Common StackArsenic Method 29 3 240 0 Common StackCadmium Method 29 3 240 0 Common StackCobalt Method 29 3 240 0 Common StackChromium Method 29 3 240 0 Common StackNickel Method 29 3 240 0 Common StackLead Method 29 3 240 0 Common StackPhosphorus (yellow or white) Method 29 3 240 0 Common StackSelenium Method 29 3 240 0 Common StackManganese Method 29 3 240 0 Common StackMercury Method 29 3 240 0 Common StackFilterable Particulate Method 29 3 240 0 Common StackAntimony Method 29 3 240 0 Common StackCo2 Method 3A CO2 9 120 0 Common StackO2 Method 3A O2 9 120 0 Common StackTotal Particulate Method 5/OTM-28 3 480 0 Common StackOrganic Condensible

Particulate Method 5/OTM-28 3 480 0 Common Stack

Inorganic (Aqueous)

Condensible Part. Method 5/OTM-28 3 480 0 Common Stack

Filterable Particulate Method 5/OTM-28 3 480 0 Common Stack



### Monday, February 14, 2011 Page 3 of 30

### RRI Energy, Elrama Power Plant

Sampling / Stack Data Results Summary



### Location Common Stack - Method 10 Average Run Number 1 2 3
Test Date 4/26/2010 4/26/2010 4/26/2010 Run Start Time 10:35:00 AM 2:35:00 PM 5:35:00 PM
Run Finish Time 1:05:00 PM 5:20:00 PM 7:55:00 PM Carbon Dioxide, % 6.4 6.5 6.5 6.467 Oxygen, % 13.4 13.3 13.3 13.333 Dry Volumetric Flow Rate, dry scfm 876092 844621 854407 858,373.333 F-Factor, dscfm/MMBtu @ %O2 9804 9777 9816 9,799.000 Moisture, % 6.33 8.57 9.25 8.050 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location Common Stack - Method 25A Average Run Number 1 2 3
Test Date 4/26/2010 4/26/2010 4/26/2010 Run Start Time 10:30:00 AM 2:35:00 PM 5:35:00 PM
Run Finish Time 11:30:00 AM 3:35:00 PM 6:35:00 PM Carbon Dioxide, % 6.4 13.3 6.5 8.733 Oxygen, % 13.4 6.5 13.3 11.067 Dry Volumetric Flow Rate, dry scfm 876092 844621 854407 858,373.333 F-Factor, dscfm/MMBtu @ %O2 9804 9777 9816 9,799.000 Moisture, % 6.33 8.57 9.25 8.050 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 4 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 26A Average Run Number 1 2 3
Test Date 4/22/2010 4/23/2010 4/23/2010 Run Start Time 1:55:00 PM 8:45:00 AM 12:30:00 PM

Run Finish Time 4:47:30 PM 12:08:30 PM 3:42:30 PM

Net Run Time, minutes 180 180 180 Dry Gas Meter Volume Sampled, dscf 169.765 163.937 166.426 166.709 Moisture Content of Stack Gas, % 7.50 6.27 8.35 7.373 Moisture Saturation at Stack Gas Temperature, % 9.71 9.86 9.34 9.637 Carbon Dioxide, % 7.2 7.1 7 7.100 Oxygen, % 12.9 12.6 12.6 12.700 Average Stack Gas Temperature, °F 112.46 113.29 111.42 112.390 Dry Volumetric Flow Rate, dry scfm 1,037,801.5 1,034,302.7 1,010,930.4 1,027,678.20 0 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,269,013.5 1,239,574.9 1,235,018.9 1,247,869.10 0 Percent Isokinetic of Sampling Rate, % 98.7 95.6 99.3 97.867 F-Factor, dscfm/MMBtu @ %O2 9813 9718 9708 9,746.333
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 5 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 29 Average Run Number 1 2 3
Test Date 4/21/2010 4/22/2010 4/22/2010 Run Start Time 11:50:00 AM 8:30:00 AM 2:40:00 PM

Run Finish Time 4:40:00 PM 12:50:00 PM 7:05:00 PM

Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 204.061 211.091 208.015 207.722 Moisture Content of Stack Gas, % 9.25 7.90 8.57 8.573 Moisture Saturation at Stack Gas Temperature, % 8.81 8.72 9.33 8.953 Carbon Dioxide, % 7.2 7.2 7.2 7.200 Oxygen, % 13 12.9 12.9 12.933 Average Stack Gas Temperature, °F 109.25 108.75 111.08 109.693 Dry Volumetric Flow Rate, dry scfm 1,034,393.2 1,043,788.1 1,023,447.9 1,033,876.40 0 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,270,064.9 1,273,569.5 1,263,055.7 1,268,896.70 0 Percent Isokinetic of Sampling Rate, % 96.5 98.9 99.4 98.267 F-Factor, dscfm/MMBtu @ %O2 9817 9669 9813 9,766.333
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location Common Stack - Method 3A CO2 Average Run Number 1 10 11
Test Date 4/21/2010 4/23/2010 4/23/2010
Run Start Time 9:00:00 AM 11:50:00 AM 2:55:00 PM

Run Finish Time 12:00:00 PM 2:50:00 PM 3:42:00 PM Carbon Dioxide, % 7.2 7 6.9 7.033 Oxygen, % 12.95 12.6 12.6 12.717 Dry Volumetric Flow Rate, dry scfm 1106383 1139870 1140305 1,128,852.66 7 F-Factor, dscfm/MMBtu @ %O2 9817 9729 9708 9,751.333 Moisture, % 8.82 10.24 10.31 9.790 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 6 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A CO2 3 Average Run Number 12 13 14
Test Date 4/26/2010 4/26/2010 4/26/2010 Run Start Time 10:35:00 AM 2:35:00 PM 5:35:00 PM
Run Finish Time 1:05:00 PM 5:20:00 PM 7:55:00 PM Carbon Dioxide, % 6.4 6.5 6.5 6.467 Oxygen, % 13.4 13.3 13.3 13.333 Dry Volumetric Flow Rate, dry scfm 876092 844621 854407 858,373.333 F-Factor, dscfm/MMBtu @ %O2 9804 9777 9816 9,799.000 Moisture, % 6.33 8.57 9.25 8.050 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location Common Stack - Method 3A CO2 3 6 Average Run Number 2 3 4
Test Date 4/21/2010 4/21/2010 4/21/2010 Run Start Time 12:05:00 PM 3:10:00 PM 6:15:00 PM
Run Finish Time 3:05:00 PM 7:30:00 PM 7:30:00 PM Carbon Dioxide, % 7.2 7.15 7.15 7.167 Oxygen, % 13 13.05 13.05 13.033 Dry Volumetric Flow Rate, dry scfm 1136424 1012889 1012889 1,054,067.33 3 F-Factor, dscfm/MMBtu @ %O2 9817 9774 9774 9,788.333 Moisture, % 9.26 7.89 7.89 8.347 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 7 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A CO2 3 6 9 Average Run Number 5 6 7
Test Date 4/22/2010 4/22/2010 4/22/2010 Run Start Time 8:30:00 AM 11:35:00 AM 2:40:00 PM

Run Finish Time 11:30:00 AM 2:35:00 PM 5:40:00 PM Carbon Dioxide, % 7.2 7.2 7.2 7.200 Oxygen, % 12.9 12.9 12.9 12.900 Dry Volumetric Flow Rate, dry scfm 1132647 1132647 1119202 1,128,165.33 3 F-Factor, dscfm/MMBtu @ %O2 9669 9669 9813 9,717.000 Moisture, % 7.9 7.9 8.57 8.123 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location Common Stack - Method 3A CO2 3 6 9 12 Average Run Number 8 9
Test Date 4/22/2010 4/23/2010 Run Start Time 5:45:00 PM 8:45:00 AM
Run Finish Time 7:05:00 PM 11:45:00 AM Carbon Dioxide, % 7.2 7.1 7.150 Oxygen, % 12.9 12.6 12.750 Dry Volumetric Flow Rate, dry scfm 1119202 1128769 1,123,985.50 0 F-Factor, dscfm/MMBtu @ %O2 9813 9718 9,765.500 Moisture, % 8.57 6.36 7.465 Fuel Type Override Override
Fw 0 0 0.000
Fc 0 0 0.000



### Monday, February 14, 2011 Page 8 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A O2 Average Run Number 1 10 11
Test Date 4/21/2010 4/23/2010 4/23/2010 Run Start Time 9:00:00 AM 11:50:00 AM 2:55:00 PM

Run Finish Time 12:00:00 PM 2:50:00 PM 3:42:00 PM Carbon Dioxide, % 7.2 7 6.9 7.033 Oxygen, % 12.95 12.6 12.6 12.717 Dry Volumetric Flow Rate, dry scfm 1106383 1139870 1140305 1,128,852.66 7 F-Factor, dscfm/MMBtu @ %O2 9817 9729 9708 9,751.333 Moisture, % 8.82 10.24 10.31 9.790 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location Common Stack - Method 3A O2 3 Average Run Number 12 13 14
Test Date 4/26/2010 4/26/2010 4/26/2010 Run Start Time 10:35:00 AM 2:35:00 PM 5:35:00 PM
Run Finish Time 1:05:00 PM 5:20:00 PM 7:55:00 PM Carbon Dioxide, % 6.4 6.6 6.5 6.500 Oxygen, % 13.4 13.3 13.3 13.333 Dry Volumetric Flow Rate, dry scfm 876092 844621 854407 858,373.333 F-Factor, dscfm/MMBtu @ %O2 9804 9777 9816 9,799.000 Moisture, % 6.33 8.57 9.25 8.050 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 9 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A O2 3 6 Average Run Number 2 3 4
Test Date 4/21/2010 4/21/2010 4/21/2010 Run Start Time 12:05:00 PM 3:10:00 PM 6:15:00 PM
Run Finish Time 3:05:00 PM 7:30:00 PM 7:30:00 PM Carbon Dioxide, % 7.2 7.15 7.15 7.167 Oxygen, % 13 13.05 13.05 13.033 Dry Volumetric Flow Rate, dry scfm 1136424 1012889 1012889 1,054,067.33 3 F-Factor, dscfm/MMBtu @ %O2 9817 9774 9774 9,788.333 Moisture, % 9.26 7.89 7.89 8.347 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location Common Stack - Method 3A O2 3 6 9 Average Run Number 5 6 7
Test Date 4/22/2010 4/21/2010 4/22/2010
Run Start Time 8:30:00 AM 11:35:00 AM 2:40:00 PM

Run Finish Time 11:30:00 AM 2:35:00 PM 5:40:00 PM Carbon Dioxide, % 7.2 7.2 7.2 7.200 Oxygen, % 12.9 12.9 12.9 12.900 Dry Volumetric Flow Rate, dry scfm 1132647 1132647 1119202 1,128,165.33 3 F-Factor, dscfm/MMBtu @ %O2 9669 9669 9813 9,717.000 Moisture, % 7.9 7.9 8.57 8.123 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 10 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A O2 3 6 9 12 Average Run Number 8 9
Test Date 4/22/2010 4/23/2010 Run Start Time 5:45:00 PM 8:45:00 AM
Run Finish Time 7:05:00 PM 11:45:00 AM Carbon Dioxide, % 7.2 7.1 7.150 Oxygen, % 12.9 12.6 12.750 Dry Volumetric Flow Rate, dry scfm 111920 1128769 620,344.500 F-Factor, dscfm/MMBtu @ %O2 9813 9718 9,765.500 Moisture, % 8.57 6.36 7.465 Fuel Type Override Override
Fw 0 0 0.000
Fc 0 0 0.000



### Location Common Stack - Method 5/OTM-28 Average Run Number 1 2 3
Test Date 4/21/2010 4/21/2010 4/22/2010 Run Start Time 9:00:00 AM 3:00:00 PM 8:30:00 AM
Run Finish Time 2:09:00 PM 7:15:00 PM 12:53:00 PM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 214.986 211.282 221.903 216.057 Moisture Content of Stack Gas, % 8.82 7.89 8.08 8.263 Moisture Saturation at Stack Gas Temperature, % 9.62 10.31 9.86 9.930 Carbon Dioxide, % 7.2 7.15 7.15 7.167 Oxygen, % 12.95 13.05 12.9 12.967 Average Stack Gas Temperature, °F 112.31 114.73 113.02 113.353 Dry Volumetric Flow Rate, dry scfm 1,008,594.9 1,012,307.5 1,013,214.5 1,011,372.30 0 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,245,182.2 1,242,378.6 1,247,985.9 1,245,182.23 3 Percent Isokinetic of Sampling Rate, % 96.5 94.5 99.1 96.700 F-Factor, dscfm/MMBtu @ %O2 9817 9774 9669 9,753.333
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 11 of 30

### RRI Energy, Elrama Power Plant

Emissions Summary



### Location: Common Stack - Method 10 Compound: Carbon Monoxide Average Run 1 2 3 lb/mmBtuO2 7.20E-02 5.25E-02 5.62E-02 0.060 ppm 3.63E+01 2.69E+01 2.86E+01 30.600 ppm@7%O2 6.73E+01 4.92E+01 5.23E+01 56.267



### Location: Common Stack - Method 25A Compound: Total organic compounds (TOC) as Average Run 1 2 3 lb/mmBtuO2 1.86E-03 8.05E-04 1.67E-03 0.001 ppm 5.94E-01 4.96E-01 5.40E-01 0.543 ppm@7%O2 1.10E+00 4.79E-01 9.88E-01 0.856



### Location: Common Stack - Method 26A Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 51.6 42 55.1 49.567 lb/mmBtuO2 1.72E-02 1.38E-02 1.78E-02 0.016 

### Compound: Hydrogen Chloride Average RunNumber 1 2 3 Mass_mg 1.68 1.62 1.75 1.683 lb/mmBtuO2 5.59E-04 5.33E-04 5.67E-04 0.001 

### Compound: Hydrogen Fluoride Average RunNumber 1 2 3 Mass_mg 0.3 0.293 0.32 0.304 lb/mmBtuO2 9.99E-05 9.64E-05 1.04E-04 0.000



### Location: Common Stack - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.00505 0.00525 0.00625 0.006 lb/mmBtuO2 1.42E-06 1.39E-06 1.70E-06 0.000 

### Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.09347 0.07947 0.08137 0.085 lb/mmBtuO2 2.62E-05 2.10E-05 2.21E-05 0.000



### Monday, February 14, 2011 Page 12 of 30

### RRI Energy, Elrama Power Plant

Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.00186 0.00176 0.00176 0.002 lb/mmBtuO2 5.22E-07 4.64E-07 4.78E-07 0.000 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.001063 0.00137 0.001063 0.001 lb/mmBtuO2 2.98E-07 3.61E-07 2.89E-07 0.000 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.03138 0.03178 0.03218 0.032 lb/mmBtuO2 8.80E-06 8.38E-06 8.74E-06 0.000 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.0023 0.0018 0.0021 0.002 lb/mmBtuO2 6.45E-07 4.75E-07 5.71E-07 0.000 

### Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 63.8 75 91.6 76.800 lb/mmBtuO2 1.79E-02 1.98E-02 2.49E-02 0.021 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.0454 0.3608 0.0114 0.139 lb/mmBtuO2 1.27E-05 9.52E-05 3.10E-06 0.000 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.0385 0.0421 0.041 0.041 lb/mmBtuO2 1.08E-05 1.11E-05 1.11E-05 0.000 

### Compound: Mercury Average RunNumber 1 2 3 Mass_mg 0.00709 0.00401 0.001076 0.004 lb/mmBtuO2 1.99E-06 1.06E-06 2.92E-07 0.000 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.0281 0.0193 0.02148 0.023 lb/mmBtuO2 7.88E-06 5.09E-06 5.84E-06 0.000



### Monday, February 14, 2011 Page 13 of 30

### RRI Energy, Elrama Power Plant

Process Run Data Compound: Phosphorus (yellow or white) Average RunNumber 1 2 3 Mass_mg 0.2372 0.2319 0.2503 0.240 lb/mmBtuO2 6.66E-05 6.12E-05 6.80E-05 0.000 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.0338 0.0472 0.0123 0.031 lb/mmBtuO2 9.48E-06 1.25E-05 3.34E-06 0.000



### Location: Common Stack - Method 5/OTM-28 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 68.4 68.2 71.7 69.433 lb/mmBtuO2 1.81E-02 1.85E-02 1.80E-02 0.018 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 17.9 28.1 21 22.333 lb/mmBtuO2 4.74E-03 7.63E-03 5.27E-03 0.006 

### Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 6.1 7.6 6.8 6.833 lb/mmBtuO2 1.61E-03 2.06E-03 1.71E-03 0.002 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 92.4 103.9 99.5 98.600 lb/mmBtuO2 2.45E-02 2.82E-02 2.50E-02 0.026



### Monday, February 14, 2011 Page 14 of 30

### RRI Energy, Elrama Power Plant

Process Run Data

APCD Run Data

Process Lab Run Data 

### Run Name Value UOM Comments Target Value 1 Heat Input 1960 mmBtu/hr 1950


### 1 Steam Flow 1340 Klb/hr 1340
2 Heat Input 1932 mmBtu/hr 1950
2 Steam Flow 1342 Klb/hr 1340


### 3 Heat Input 1944 mmBtu/hr 1950
3 Steam Flow 1344 Klb/hr 1340



### Run Name Value UOM Comments Target Value 1 VENTURI SCRUBBER 101 in. H2O 6


### 1 VENTURI SCRUBBER 201 in. H2O 6
1 VENTURI SCRUBBER 301 in. H2O 6
1 VENTURI SCRUBBER 401 in. H2O 6


### 1 VENTURI SCRUBBER 501 in. H2O 6

Monday, February 14, 2011 Page 15 of 30

### RRI Energy, Elrama Power Plant

Sampling / Stack Data Results Detail



### Location Common Stack - Method 10 Average Run Number 1 2 3 Test Date 4/26/2010 4/26/2010 4/26/2010 Run Start Time 10:35:00 AM 2:35:00 PM 5:35:00 PM Run Finish Time 1:05:00 PM 5:20:00 PM 7:55:00 PM Carbon Dioxide, % 6.4 6.5 6.5 6.467 Oxygen, % 13.4 13.3 13.3 13.333 Fuel Factor 1.17 1.17 1.17 Dry Volumetric Flow Rate, dry scfm 876092 844621 854407858,373.333 F-Factor, dscfm/MMBtu @ %O2 9804 9777 9816 9,799.000 Moisture, % 6.33 8.57 9.25 8.050 Analyzer Make Thermo Env. Thermo Env.l Thermo Env.

Analyzer Model 48 48 48 48.000 Analyzer Serial Number 35982-251 35982-251 35982-251 Operating Range 504 504 504 504.000 Operating Units ppm ppm ppm No. Readings/Avg. 120 120 120 120.000 Calibration Set 11 11 11 11.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.38 0.44 0.37 0.397 Calibration Pre Zero Cylinder Bias -0.01 0 -0.02 -0.010 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0005121 EB0005121 EB0005121 Calibration Pre High Cylinder Instrument Response 227.65 229.01 225.65 227.437 Calibration Pre High Cylinder Bias -0.09 0.18 -0.49 -0.133 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.44 0.37 0.38 0.397 Calibration Post Zero Cylinder Bias 0 -0.02 -0.01 -0.010 Calibration Post Zero Cylinder Drift 0.01 0.02 0.01 0.013 Calibration Post High Cylinder ID EB0005121 EB0005121 EB0005121 Calibration Post High Cylinder Instrument Response 229.01 225.65 229.45 228.037 Calibration Post High Cylinder Bias 0.18 -0.49 0.27 -0.013 Calibration Post High Cylinder Drift 0.27 0.67 0.76 0.567 Cavg 36.5 27.03 28.77 30.767 Cavg Units ppmvd ppmvd ppmvd Cgas 36.261 26.8685 28.6231 30.584 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 16 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 25A Average Run Number 1 2 3 Test Date 4/26/2010 4/26/2010 4/26/2010 Run Start Time 10:30:00 AM 2:35:00 PM 5:35:00 PM Run Finish Time 11:30:00 AM 3:35:00 PM 6:35:00 PM Carbon Dioxide, % 6.4 13.3 6.5 8.733 Oxygen, % 13.4 6.5 13.3 11.067 Fuel Factor 1.17 1.08 1.17 Dry Volumetric Flow Rate, dry scfm 876092 844621 854407858,373.333 F-Factor, dscfm/MMBtu @ %O2 9804 9777 9816 9,799.000 Moisture, % 6.33 8.57 9.25 8.050 Analyzer Make CAI CAI CAI Analyzer Model 300HFID 300 HFID 300 HFID Analyzer Serial Number 27 302006 27 302006 27 302006 Operating Range 9.03 9.03 9.03 9.030 Operating Units ppm ppm ppm No. Readings/Avg. 120 120 120 120.000 Calibration Set 12 12 12 12.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.02 0.11 0.05 0.060 Calibration Pre Zero Cylinder Bias -0.55 0.44 -0.22 -0.110 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC243371 CC243371 CC243371 Calibration Pre High Cylinder Instrument Response 5.22 5.24 5.24 5.233 Calibration Pre High Cylinder Bias -0.66 -0.44 -0.44 -0.513 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.05 0.11 0.16 0.107 Calibration Post Zero Cylinder Bias -0.22 0.44 1 0.407 Calibration Post Zero Cylinder Drift 0.33 0 1.22 0.517 Calibration Post High Cylinder ID CC243371 CC243371 CC243371 Calibration Post High Cylinder Instrument Response 5.24 5.28 5.31 5.277 Calibration Post High Cylinder Bias -0.44 0 0.33 -0.037 Calibration Post High Cylinder Drift 0.22 0.44 0.77 0.477 Cavg 0.615 0.59 0.63 0.612 Cavg Units ppmvd ppmvd ppmvd Cgas 0.594 0.4958 0.5402 0.543 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 17 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 26A Average Run Number 1 2 3 Test Date 4/22/2010 4/23/2010 4/23/2010 Run Start Time 1:55:00 PM 8:45:00 AM 12:30:00 PM Run Finish Time 4:47:30 PM 12:08:30 PM 3:42:30 PM Net Traversing Points 24 24 24 Net Run Time, minutes 180 180 180 Nozzle Diameter, inches 0.314 0.314 0.314 0.314 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.981 0.981 0.981 0.981 Barometric Pressure, inches of Mercury 28.67 28.91 28.91 28.830 Average Orifice Meter Differential, inches H2O 3.38 2.91 3.18 3.157 Dry Gas Meter Volume Sampled, cubic feet 183.244 169.635 177.921 176.933 Average Dry Gas Meter Temperature, °F 80.38 61.71 79.38 73.823 Dry Gas Meter Volume Sampled, dscf 169.765 163.937 166.426 166.709 Total Moisture Liquid collected, g 292.5 233 322 282.500 Volume of Water Vapor, standard cubic feet 13.77 10.97 15.16 13.300 Moisture Content of Stack Gas, % 7.50 6.27 8.35 7.373 Moisture Saturation at Stack Gas Temperature, % 9.71 9.86 9.34 9.637 Dry Mole Fraction 0.925 0.9373 0.9165 0.926 Carbon Dioxide, % 7.2 7.1 7 7.100 Oxygen, % 12.9 12.6 12.6 12.700 Carbon Monoxide & Nitrogen, % 79.9 80.3 80.4 80.200 Fuel Factor 1.11 1.17 1.19 Dry Molecular Weight, lb/lb-Mole 29.67 29.64 29.62 29.643 Wet Molecular weight, lb/lb-Mole 28.79 28.91 28.65 28.783 Flue Gas Static Pressure, inches of H2O 0.2 0.2 0.2 0.200 Absolute Flue Gas Pressure, inches of Mercury 28.68 28.92 28.92 28.840 Average Stack Gas Temperature, °F 112.46 113.29 111.42 112.390 Average Velocity Head, inches of H2O 0.3666513296 43275 0.353858233

977806 0.349163743

056655 0.357

Average Stack Gas Velocity, feet/second 36.21 35.37 35.24 35.607 Stack Cross-Sectional Area, square feet 584.099 584.099 584.099 584.099 Dry Volumetric Flow Rate, dry scfm 1,037,801.5 1,034,302.7 1,010,930.41,027,678.2 00 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,269,013.5 1,239,574.9 1,235,018.91,247,869.1 00 Percent Isokinetic of Sampling Rate, % 98.7 95.6 99.3 97.867 Percent Excess Air, % 157.4 146.5 146.1 150.000 F-Factor, dscfm/MMBtu @ %O2 9813 9718 9708 9,746.333 Round Duct Diameter, inches 327.25 327.25 327.25 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



### Monday, February 14, 2011 Page 18 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 29 Average Run Number 1 2 3 Test Date 4/21/2010 4/22/2010 4/22/2010 Run Start Time 11:50:00 AM 8:30:00 AM 2:40:00 PM Run Finish Time 4:40:00 PM 12:50:00 PM 7:05:00 PM Net Traversing Points 48 48 48 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.302 0.302 0.302 0.302 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.955 0.955 0.955 0.955 Barometric Pressure, inches of Mercury 28.8 28.67 28.67 28.713 Average Orifice Meter Differential, inches H2O 2.60 2.72 2.74 2.687 Dry Gas Meter Volume Sampled, cubic feet 224.106 229.567 230.135 227.936 Average Dry Gas Meter Temperature, °F 76.58 69.13 78.31 74.673 Dry Gas Meter Volume Sampled, dscf 204.061 211.091 208.015 207.722 Total Moisture Liquid collected, g 442 384.5 414.5 413.667 Volume of Water Vapor, standard cubic feet 20.80 18.10 19.51 19.470 Moisture Content of Stack Gas, % 9.25 7.90 8.57 8.573 Moisture Saturation at Stack Gas Temperature, % 8.81 8.72 9.33 8.953 Dry Mole Fraction 0.9119 0.921 0.9143 0.916 Carbon Dioxide, % 7.2 7.2 7.2 7.200 Oxygen, % 13 12.9 12.9 12.933 Carbon Monoxide & Nitrogen, % 79.8 79.9 79.9 79.867 Fuel Factor 1.10 1.11 1.11 Dry Molecular Weight, lb/lb-Mole 29.67 29.67 29.67 29.670 Wet Molecular weight, lb/lb-Mole 28.72 28.75 28.67 28.713 Flue Gas Static Pressure, inches of H2O 0.2 0.2 0.2 0.200 Absolute Flue Gas Pressure, inches of Mercury 28.81 28.68 28.68 28.723 Average Stack Gas Temperature, °F 109.25 108.75 111.08 109.693 Average Velocity Head, inches of H2O 0.3702121966 70679 0.371328067

143283 0.362634039

262722 0.368

Average Stack Gas Velocity, feet/second 36.24 36.34 36.04 36.207 Stack Cross-Sectional Area, square feet 584.099 584.099 584.099 584.099 Dry Volumetric Flow Rate, dry scfm 1,034,393.2 1,043,788.1 1,023,447.91,033,876.4 00 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,270,064.9 1,273,569.5 1,263,055.71,268,896.7 00 Percent Isokinetic of Sampling Rate, % 96.5 98.9 99.4 98.267 Percent Excess Air, % 161.1 157.4 157.4 158.633 F-Factor, dscfm/MMBtu @ %O2 9817 9669 9813 9,766.333 Round Duct Diameter, inches 327.25 327.25 327.25 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



### Monday, February 14, 2011 Page 19 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A CO2 Average Run Number 1 10 11 Test Date 4/21/2010 4/23/2010 4/23/2010 Run Start Time 9:00:00 AM11:50:00 AM 2:55:00 PM Run Finish Time 12:00:00 PM 2:50:00 PM 3:42:00 PM Carbon Dioxide, % 7.2 7 6.9 7.033 Oxygen, % 12.95 12.6 12.6 12.717 Fuel Factor 1.1 1.19 1.2 Dry Volumetric Flow Rate, dry scfm 1106383 1139870 11403051,128,852.6 67 F-Factor, dscfm/MMBtu @ %O2 9817 9729 9708 9,751.333 Moisture, % 8.82 10.24 10.31 9.790 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/1194 01415C/119 4 01415C/1194

Operating Range 18 18 18 18.000 Operating Units % % % No. Readings/Avg. 180 180 60 140.000 Calibration Set 2 7 7 5.333 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.19 0.11 0.19 0.163 Calibration Pre Zero Cylinder Bias 0.22 -0.22 0.22 0.073 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC53029 CC53029 CC53029 Calibration Pre High Cylinder Instrument Response 8.87 8.89 9.01 8.923 Calibration Pre High Cylinder Bias -0.06 -0.89 -0.22 -0.390 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.14 0.19 0.18 0.170 Calibration Post Zero Cylinder Bias -0.06 0.22 0.17 0.110 Calibration Post Zero Cylinder Drift 0.28 0.44 0.05 0.257 Calibration Post High Cylinder ID CC53029 CC53029 CC53029 Calibration Post High Cylinder Instrument Response 8.96 9.01 9.06 9.010 Calibration Post High Cylinder Bias 0.44 -0.22 0.06 0.093 Calibration Post High Cylinder Drift 0.5 0.67 0.28 0.483 Cavg 7.19 7 7 7.063 Cavg Units ppmvd ppmvd ppmvd Cgas 7.2337 7.0135 6.9382 7.062 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 20 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A CO2 3 Average Run Number 12 13 14 Test Date 4/26/2010 4/26/2010 4/26/2010 Run Start Time 10:35:00 AM 2:35:00 PM 5:35:00 PM Run Finish Time 1:05:00 PM 5:20:00 PM 7:55:00 PM Carbon Dioxide, % 6.4 6.5 6.5 6.467 Oxygen, % 13.4 13.3 13.3 13.333 Fuel Factor 1.17 1.17 1.17 Dry Volumetric Flow Rate, dry scfm 876092 844621 854407858,373.333 F-Factor, dscfm/MMBtu @ %O2 9804 9777 9816 9,799.000 Moisture, % 6.33 8.57 9.25 8.050 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/1194 01415C/119 4 01415C/1194

Operating Range 18 18 18 18.000 Operating Units % % % No. Readings/Avg. 120 120 120 120.000 Calibration Set 10 10 10 10.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.15 0.11 0.15 0.137 Calibration Pre Zero Cylinder Bias 0.06 -0.17 0.06 -0.017 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC53029 CC53029 CC53029 Calibration Pre High Cylinder Instrument Response 8.88 8.94 8.99 8.937 Calibration Pre High Cylinder Bias -0.11 0.22 0.5 0.203 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.11 0.15 0.18 0.147 Calibration Post Zero Cylinder Bias -0.17 0.06 0.22 0.037 Calibration Post Zero Cylinder Drift 0.23 0.23 0.16 0.207 Calibration Post High Cylinder ID CC53029 CC53029 CC53029 Calibration Post High Cylinder Instrument Response 8.94 8.99 9.05 8.993 Calibration Post High Cylinder Bias 0.22 0.5 0.83 0.517 Calibration Post High Cylinder Drift 0.33 0.28 0.33 0.313 Cavg 6.37 6.48 6.52 6.457 Cavg Units ppmvd ppmvd ppmvd Cgas 6.4035 6.4758 6.4662 6.449 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 21 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A CO2 3 6 Average Run Number 2 3 4 Test Date 4/21/2010 4/21/2010 4/21/2010 Run Start Time 12:05:00 PM 3:10:00 PM 6:15:00 PM Run Finish Time 3:05:00 PM 7:30:00 PM 7:30:00 PM Carbon Dioxide, % 7.2 7.15 7.15 7.167 Oxygen, % 13 13.05 13.05 13.033 Fuel Factor 1.1 1.1 1.1 Dry Volumetric Flow Rate, dry scfm 1136424 1012889 10128891,054,067.3 33 F-Factor, dscfm/MMBtu @ %O2 9817 9774 9774 9,788.333 Moisture, % 9.26 7.89 7.89 8.347 Analyzer Make Servomex Servomex servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01420C/1194 01415C/119 4 01415C/1194

Operating Range 18 18 18 18.000 Operating Units % % % No. Readings/Avg. 180 180 60 140.000 Calibration Set 2 2 2 2.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.14 0.11 0.15 0.133 Calibration Pre Zero Cylinder Bias -0.06 -0.22 0 -0.093 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC53029 CC53029 CC53029 Calibration Pre High Cylinder Instrument Response 8.96 8.83 8.79 8.860 Calibration Pre High Cylinder Bias 0.44 -0.28 -0.5 -0.113 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.11 0.15 0.11 0.123 Calibration Post Zero Cylinder Bias -0.22 0 -0.22 -0.147 Calibration Post Zero Cylinder Drift 0.16 0.22 0.22 0.200 Calibration Post High Cylinder ID CC53029 CC53029 CC53029 Calibration Post High Cylinder Instrument Response 8.83 8.79 8.99 8.870 Calibration Post High Cylinder Bias -0.28 -0.5 0.61 -0.057 Calibration Post High Cylinder Drift 0.72 0.22 1.11 0.683 Cavg 7.16 7.03 7.03 7.073 Cavg Units ppmvd ppmvd ppmvd Cgas 7.2275 7.1623 7.0969 7.162 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 22 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A CO2 3 6 9 Average Run Number 5 6 7 Test Date 4/22/2010 4/22/2010 4/22/2010 Run Start Time 8:30:00 AM11:35:00 AM 2:40:00 PM Run Finish Time 11:30:00 AM 2:35:00 PM 5:40:00 PM Carbon Dioxide, % 7.2 7.2 7.2 7.200 Oxygen, % 12.9 12.9 12.9 12.900 Fuel Factor 1.11 1.11 1.11 Dry Volumetric Flow Rate, dry scfm 1132647 1132647 11192021,128,165.3 33 F-Factor, dscfm/MMBtu @ %O2 9669 9669 9813 9,717.000 Moisture, % 7.9 7.9 8.57 8.123 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/1194 01415C/119 4 01415C/1194

Operating Range 18 18 18 18.000 Operating Units % % % No. Readings/Avg. 180 180 180 180.000 Calibration Set 5 5 5 5.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.19 0.14 0.18 0.170 Calibration Pre Zero Cylinder Bias 0.44 0.17 0.39 0.333 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID CC53029 CC53029 CC53029 Calibration Pre High Cylinder Instrument Response 8.9 8.88 8.84 8.873 Calibration Pre High Cylinder Bias -1.11 -1.22 -1.44 -1.257 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.14 0.18 0.16 0.160 Calibration Post Zero Cylinder Bias 0.17 0.39 0.28 0.280 Calibration Post Zero Cylinder Drift 0.27 0.22 0.11 0.200 Calibration Post High Cylinder ID CC53029 CC53029 CC53029 Calibration Post High Cylinder Instrument Response 8.88 8.84 8.83 8.850 Calibration Post High Cylinder Bias -1.22 -1.44 -1.5 -1.387 Calibration Post High Cylinder Drift 0.11 0.22 6.000000000 00001E-02 0.130

Cavg 7.05 7.08 7.05 7.060 Cavg Units ppmvd ppmvd ppmvd Cgas 7.1099 7.1666 7.1539 7.143 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 23 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A CO2 3 6 9 12 Average Run Number 8 9 Test Date 4/22/2010 4/23/2010 Run Start Time 5:45:00 PM 8:45:00 AM Run Finish Time 7:05:00 PM11:45:00 AM Carbon Dioxide, % 7.2 7.1 7.150 Oxygen, % 12.9 12.6 12.750 Fuel Factor 1.11 1.17 Dry Volumetric Flow Rate, dry scfm 1119202 1128769 1,123,985.5 00 F-Factor, dscfm/MMBtu @ %O2 9813 9718 9,765.500 Moisture, % 8.57 6.36 7.465 Analyzer Make Servomex Servomex Analyzer Model 1440 1440 1,440.000 Analyzer Serial Number 01415C/1194 01415C/119 4 Operating Range 18 18 18.000 Operating Units % % No. Readings/Avg. 60 180 120.000 Calibration Set 5 7 6.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.16 0.15 0.155 Calibration Pre Zero Cylinder Bias 0.28 0 0.140 Calibration Pre Zero Cylinder Drift 0 0 0.000 Calibration Pre High Cylinder ID CC53029 CC53029 Calibration Pre High Cylinder Instrument Response 8.83 9 8.915 Calibration Pre High Cylinder Bias -1.5 -0.28 -0.890 Calibration Pre High Cylinder Drift 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.18 0.11 0.145 Calibration Post Zero Cylinder Bias 0.39 -0.22 0.085 Calibration Post Zero Cylinder Drift 0.11 0.22 0.165 Calibration Post High Cylinder ID CC53029 CC53029 Calibration Post High Cylinder Instrument Response 8.88 8.89 8.885 Calibration Post High Cylinder Bias -1.22 -0.89 -1.055 Calibration Post High Cylinder Drift 0.28 0.61 0.445 Cavg 0 7.1 3.550 Cavg Units ppmvd ppmvd Cgas 0 7.1242 3.562 Cgas Units ppmvd ppmvd Fuel Type Override Override Fw 0 0 0.000 Fc 0 0 0.000 Cgasw 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 24 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A O2 Average Run Number 1 10 11 Test Date 4/21/2010 4/23/2010 4/23/2010 Run Start Time 9:00:00 AM11:50:00 AM 2:55:00 PM Run Finish Time 12:00:00 PM 2:50:00 PM 3:42:00 PM Carbon Dioxide, % 7.2 7 6.9 7.033 Oxygen, % 12.95 12.6 12.6 12.717 Fuel Factor 1.1 1.19 1.2 Dry Volumetric Flow Rate, dry scfm 1106383 1139870 11403051,128,852.6 67 F-Factor, dscfm/MMBtu @ %O2 9817 9729 9708 9,751.333 Moisture, % 8.82 10.24 10.31 9.790 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/1193 01415C/119 3 01415C/1194

Operating Range 22.3 22.3 22.3 22.300 Operating Units % % % No. Readings/Avg. 180 180 60 140.000 Calibration Set 4 8 8 6.667 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.11 0.08 0.14 0.110 Calibration Pre Zero Cylinder Bias 0.04 -0.54 -0.27 -0.257 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0004573_O 2EB0004573_

O2 EB0004573_

O2 Calibration Pre High Cylinder Instrument Response 10.89 11.04 11.1 11.010 Calibration Pre High Cylinder Bias 0 -0.04 0.22 0.060 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.18 0.14 0.19 0.170 Calibration Post Zero Cylinder Bias 0.36 -0.27 -0.04 0.017 Calibration Post Zero Cylinder Drift 0.32 0.27 0.23 0.273 Calibration Post High Cylinder ID EB0004573_O 2EB0004573_

O2 EB0004573_

O2 Calibration Post High Cylinder Instrument Response 10.95 11.1 11.07 11.040 Calibration Post High Cylinder Bias 0.27 0.22 0.09 0.193 Calibration Post High Cylinder Drift 0.27 0.26 0.13 0.220 Cavg 12.85 12.67 12.65 12.723 Cavg Units ppmvd ppmvd ppmvd Cgas 12.9703 12.6058 12.5765 12.718 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 25 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A O2 3 Average Run Number 12 13 14 Test Date 4/26/2010 4/26/2010 4/26/2010 Run Start Time 10:35:00 AM 2:35:00 PM 5:35:00 PM Run Finish Time 1:05:00 PM 5:20:00 PM 7:55:00 PM Carbon Dioxide, % 6.4 6.6 6.5 6.500 Oxygen, % 13.4 13.3 13.3 13.333 Fuel Factor 1.17 1.15 1.17 Dry Volumetric Flow Rate, dry scfm 876092 844621 854407858,373.333 F-Factor, dscfm/MMBtu @ %O2 9804 9777 9816 9,799.000 Moisture, % 6.33 8.57 9.25 8.050 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/1193 01415C/119 4 01415C/1194

Operating Range 22.3 22.3 22.3 22.300 Operating Units % % % No. Readings/Avg. 120 120 120 120.000 Calibration Set 9 9 9 9.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.15 0.18 0.15 0.160 Calibration Pre Zero Cylinder Bias 0 0.13 0 0.043 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0004573_O 2EB0004573_

O2 EB0004573_

O2 Calibration Pre High Cylinder Instrument Response 10.88 10.92 10.83 10.877 Calibration Pre High Cylinder Bias -0.18 0 -0.4 -0.193 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.18 0.15 0.16 0.163 Calibration Post Zero Cylinder Bias 0.13 0 0.04 0.057 Calibration Post Zero Cylinder Drift 0.13 0.13 0.04 0.100 Calibration Post High Cylinder ID EB0004573_O 2EB0004573_

O2 EB0004573_

O2 Calibration Post High Cylinder Instrument Response 10.92 10.83 10.94 10.897 Calibration Post High Cylinder Bias 0 -0.4 0.09 -0.103 Calibration Post High Cylinder Drift 0.18 0.4 0.49 0.357 Cavg 13.21 13.11 13.08 13.133 Cavg Units ppmvd ppmvd ppmvd Cgas 13.367 13.2955 13.2502 13.304 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 26 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A O2 3 6 Average Run Number 2 3 4 Test Date 4/21/2010 4/21/2010 4/21/2010 Run Start Time 12:05:00 PM 3:10:00 PM 6:15:00 PM Run Finish Time 3:05:00 PM 7:30:00 PM 7:30:00 PM Carbon Dioxide, % 7.2 7.15 7.15 7.167 Oxygen, % 13 13.05 13.05 13.033 Fuel Factor 1.1 1.1 1.1 Dry Volumetric Flow Rate, dry scfm 1136424 1012889 10128891,054,067.3 33 F-Factor, dscfm/MMBtu @ %O2 9817 9774 9774 9,788.333 Moisture, % 9.26 7.89 7.89 8.347 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/1193 01420C/119 3 01415C/1193

Operating Range 22.3 22.3 22.3 22.300 Operating Units % % % No. Readings/Avg. 180 180 60 140.000 Calibration Set 4 4 4 4.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.18 0.11 0.15 0.147 Calibration Pre Zero Cylinder Bias 0.36 0.04 0.22 0.207 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0004573_O 2EB0004573_

O2 EB0004573_

O2 Calibration Pre High Cylinder Instrument Response 10.95 10.93 10.88 10.920 Calibration Pre High Cylinder Bias 0.27 0.18 -0.04 0.137 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.11 0.15 0.22 0.160 Calibration Post Zero Cylinder Bias 0.04 0.22 0.54 0.267 Calibration Post Zero Cylinder Drift 0.32 0.18 0.32 0.273 Calibration Post High Cylinder ID EB0004573_O 2EB0004573_

O2 EB0004573_

O2 Calibration Post High Cylinder Instrument Response 10.93 10.88 10.82 10.877 Calibration Post High Cylinder Bias 0.18 -0.04 -0.31 -0.057 Calibration Post High Cylinder Drift 0.09 0.22 0.27 0.193 Cavg 12.77 12.92 12.81 12.833 Cavg Units ppmvd ppmvd ppmvd Cgas 12.8648 13.0571 13.0216 12.981 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 27 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A O2 3 6 9 Average Run Number 5 6 7 Test Date 4/22/2010 4/21/2010 4/22/2010 Run Start Time 8:30:00 AM11:35:00 AM 2:40:00 PM Run Finish Time 11:30:00 AM 2:35:00 PM 5:40:00 PM Carbon Dioxide, % 7.2 7.2 7.2 7.200 Oxygen, % 12.9 12.9 12.9 12.900 Fuel Factor 1.11 1.11 1.11 Dry Volumetric Flow Rate, dry scfm 1132647 1132647 11192021,128,165.3 33 F-Factor, dscfm/MMBtu @ %O2 9669 9669 9813 9,717.000 Moisture, % 7.9 7.9 8.57 8.123 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/1193 01415C/119 3 01420C/1193

Operating Range 22.3 22.3 22.3 22.300 Operating Units % % % No. Readings/Avg. 180 180 180 180.000 Calibration Set 6 6 6 6.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.15 0.11 0.16 0.140 Calibration Pre Zero Cylinder Bias -0.18 -0.36 -0.13 -0.223 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0004573_O 2EB0004573_

O2 EB0004573_

O2 Calibration Pre High Cylinder Instrument Response 10.95 10.88 10.81 10.880 Calibration Pre High Cylinder Bias 0.18 -0.13 -0.45 -0.133 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.11 0.16 0.21 0.160 Calibration Post Zero Cylinder Bias -0.36 -0.13 0.09 -0.133 Calibration Post Zero Cylinder Drift 0.18 0.23 0.22 0.210 Calibration Post High Cylinder ID EB0004573_O 2EB0004573_

O2 EB0004573_

O2 Calibration Post High Cylinder Instrument Response 10.88 10.81 10.88 10.857 Calibration Post High Cylinder Bias -0.13 -0.45 -0.13 -0.237 Calibration Post High Cylinder Drift 0.31 0.32 0.32 0.317 Cavg 12.77 12.69 12.65 12.703 Cavg Units ppmvd ppmvd ppmvd Cgas 12.892 12.895 12.8626 12.883 Cgas Units ppmvd ppmvd ppmvd Fuel Type Override Override Override Fw 0 0 0 0.000 Fc 0 0 0 0.000 Cgasw 0 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 28 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 3A O2 3 6 9 12 Average Run Number 8 9 Test Date 4/22/2010 4/23/2010 Run Start Time 5:45:00 PM 8:45:00 AM Run Finish Time 7:05:00 PM11:45:00 AM Carbon Dioxide, % 7.2 7.1 7.150 Oxygen, % 12.9 12.6 12.750 Fuel Factor 1.11 1.17 Dry Volumetric Flow Rate, dry scfm 111920 1128769 620,344.500 F-Factor, dscfm/MMBtu @ %O2 9813 9718 9,765.500 Moisture, % 8.57 6.36 7.465 Analyzer Make Servomex Servomex Analyzer Model 1440 1440 1,440.000 Analyzer Serial Number 01415C/1193 01420C/119 3 Operating Range 22.3 22.3 22.300 Operating Units % % No. Readings/Avg. 60 180 120.000 Calibration Set 6 8 7.000 Calibration Pre Zero Cylinder ID EB0020533 EB0020533 Calibration Pre Zero Cylinder Instrument Response 0.21 0.18 0.195 Calibration Pre Zero Cylinder Bias 0.09 -0.09 0.000 Calibration Pre Zero Cylinder Drift 0 0 0.000 Calibration Pre High Cylinder ID EB0004573_O 2EB0004573_

O2 Calibration Pre High Cylinder Instrument Response 10.88 11 10.940 Calibration Pre High Cylinder Bias -0.13 -0.22 -0.175 Calibration Pre High Cylinder Drift 0 0 0.000 Calibration Post Zero Cylinder ID EB0020533 EB0020533 Calibration Post Zero Cylinder Instrument Response 0.19 0.08 0.135 Calibration Post Zero Cylinder Bias 0 -0.54 -0.270 Calibration Post Zero Cylinder Drift 0.09 0.45 0.270 Calibration Post High Cylinder ID EB0004573_O 2EB0004573_

O2 Calibration Post High Cylinder Instrument Response 10.83 11.04 10.935 Calibration Post High Cylinder Bias -0.36 -0.04 -0.200 Calibration Post High Cylinder Drift 0.23 0.18 0.205 Cavg 12.64 12.62 12.630 Cavg Units ppmvd ppmvd Cgas 12.8428 12.6162 12.730 Cgas Units ppmvd ppmvd Fuel Type Override Override Fw 0 0 0.000 Fc 0 0 0.000 Cgasw 0 0 0.000 Cgasw Units



### Monday, February 14, 2011 Page 29 of 30

### RRI Energy, Elrama Power Plant

Location Common Stack - Method 5/OTM-28 Average Run Number 1 2 3 Test Date 4/21/2010 4/21/2010 4/22/2010 Run Start Time 9:00:00 AM 3:00:00 PM 8:30:00 AM Run Finish Time 2:09:00 PM 7:15:00 PM 12:53:00 PM Net Traversing Points 48 48 48 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.314 0.314 0.314 0.314 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.981 0.981 0.981 0.981 Barometric Pressure, inches of Mercury 28.8 28.8 28.67 28.757 Average Orifice Meter Differential, inches H2O 2.92 2.94 3.04 2.967 Dry Gas Meter Volume Sampled, cubic feet 227.413 225.940 234.126 229.160 Average Dry Gas Meter Temperature, °F 71.33 77.17 67.75 72.083 Dry Gas Meter Volume Sampled, dscf 214.986 211.282 221.903 216.057 Total Moisture Liquid collected, g 442 384.5 414.5 413.667 Volume of Water Vapor, standard cubic feet 20.80 18.10 19.51 19.470 Moisture Content of Stack Gas, % 8.82 7.89 8.08 8.263 Moisture Saturation at Stack Gas Temperature, % 9.62 10.31 9.86 9.930 Dry Mole Fraction 0.9118 0.9211 0.9192 0.917 Carbon Dioxide, % 7.2 7.15 7.15 7.167 Oxygen, % 12.95 13.05 12.9 12.967 Carbon Monoxide & Nitrogen, % 79.85 79.8 79.95 79.867 Fuel Factor 1.10 1.10 1.12 Dry Molecular Weight, lb/lb-Mole 29.67 29.67 29.66 29.667 Wet Molecular weight, lb/lb-Mole 28.64 28.75 28.72 28.703 Flue Gas Static Pressure, inches of H2O 0.2 0.2 0.2 0.200 Absolute Flue Gas Pressure, inches of Mercury 28.81 28.81 28.68 28.767 Average Stack Gas Temperature, °F 112.31 114.73 113.02 113.353 Average Velocity Head, inches of H2O 0.3528483205 77941 0.351240157

359578 0.353521242

736185 0.353

Average Stack Gas Velocity, feet/second 35.53 35.45 35.61 35.530 Stack Cross-Sectional Area, square feet 584.099 584.099 584.099 584.099 Dry Volumetric Flow Rate, dry scfm 1,008,594.9 1,012,307.5 1,013,214.51,011,372.3 00 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,245,182.2 1,242,378.6 1,247,985.91,245,182.2 33 Percent Isokinetic of Sampling Rate, % 96.5 94.5 99.1 96.700 Percent Excess Air, % 159.3 162.8 157.2 159.767 F-Factor, dscfm/MMBtu @ %O2 9817 9774 9669 9,753.333 Round Duct Diameter, inches 327.25 327.25 327.25 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



### Monday, February 14, 2011 Page 30 of 30