### 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: 8/20/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

## RRI Energy, Shawville Station 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 33

### RRI Energy, Shawville Station

Facility Information:
Shawville 3 & 4 Common Stack
250 Power Plant Road

Shawville PA16873 Contact:Shawn Stenlake Phone:570-897-2140 Fax: 570-897-2110 Email: sstenlake@rrienergy.com Testing Company: Grace Consulting, Inc.
510 Dickson Street

Wellington OH44090 Contact:Carl Vineyard Phone:440-647-6672 Fax: 440-647-6673 Email:carlvineyard@gcitest.com

Air Permit Number: 17-00001 Permitted Source ID/Name: RRIEnergy ShawvilleCS Permitted Maximum Process Rate: 3580 Max. Normal Operation Process Rate: 3588 Target Process Test Rate 2900

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: Upstream Downstream drawing attached. Industry/SCC/NAIS221112

Sampling Location Information:

Test Parameter Information: AFS #:4203300001 FRS #:110000603641

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 CS3&4 228 7134 1290 4 0 5 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Carbon Monoxide Method 10 3 180 0 CS3&4 2,3,7,8-TCDD Method 23 3 480 0 CS3&4 1,2,3,7,8-PeCDD Method 23 3 480 0 CS3&4 1,2,3,4,7,8-HxCDD Method 23 3 480 0 CS3&4 1,2,3,6,7,8-HxCDD Method 23 3 480 0 CS3&4 1,2,3,7,8,9-HxCDD Method 23 3 480 0 CS3&4 Regulation Description Compound Limit Unit TVOP#-1700001 0



### Monday, February 14, 2011 Page 2 of 33

### RRI Energy, Shawville Station

1,2,3,4,6,7,8-HpCDD Method 23 3 480 0 CS3&4 OCDD Method 23 3 480 0 CS3&4 2,3,7,8-TCDF Method 23 3 480 0 CS3&4 1,2,3,7,8-PeCDF Method 23 3 480 0 CS3&4 2,3,4,7,8-PeCDF Method 23 3 480 0 CS3&4 1,2,3,4,7,8-HxCDF Method 23 3 480 0 CS3&4 1,2,3,6,7,8-HxCDF Method 23 3 480 0 CS3&4 2,3,4,6,7,8-HxCDF Method 23 3 480 0 CS3&4 1,2,3,7,8,9-HxCDF Method 23 3 480 0 CS3&4 1,2,3,4,6,7,8-HpCDF Method 23 3 480 0 CS3&4 1,2,3,4,7,8,9-HpCDF Method 23 3 480 0 CS3&4 OCDF Method 23 3 480 0 CS3&4 3,3',4,4'-TCB (PCB77) Method 23 3 480 0 CS3&4 3,4,4',5-TCB (PCB81) Method 23 3 480 0 CS3&4 2,3,3',4,4'-PeCB (PCB105) Method 23 3 480 0 CS3&4 2,3,4,4',5-PeCB (PCB114) Method 23 3 480 0 CS3&4 2,3',4,4',5-PeCB (PCB118) Method 23 3 480 0 CS3&4 2',3,4,4',5-PeCB (PCB123) Method 23 3 480 0 CS3&4 3,3',4,4',5-PeCB (PCB126) Method 23 3 480 0 CS3&4 2,3,3',4,4',5/2,3,3',4,4',5'-

HxCB (PCBs156/157) Method 23 3 480 0 CS3&4

2,3',4,4',5,5'-HxCB (PCB167)Method 23 3 480 0 CS3&4 3,3',4,4',5,5'-HxCB (PCB169)Method 23 3 480 0 CS3&4 2,3,3',4,4',5,5'-HpCB

(PCB189) Method 23 3 480 0 CS3&4
Total organic compounds

(TOC) as Propane Method 25A 3 120 0 CS3&4

Filterable Particulate Method 26A 3 180 0 CS3&4 Hydrogen Fluoride Method 26A 3 180 0 CS3&4 Hydrogen Chloride Method 26A 3 180 0 CS3&4 Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 329 0 CS3&4

Total PM2.5 OTM - 27/28 3 329 0 CS3&4 Organic Condensible

Particulate OTM - 27/28 3 329 0 CS3&4

Filterable PM2.5 OTM - 27/28 3 329 0 CS3&4 Filterable Particulate OTM - 27/28 3 329 0 CS3&4 Total Particulate OTM - 27/28 3 329 0 CS3&4 Beryllium Method 29 3 240 0 CS3&4 Lead Method 29 3 240 0 CS3&4 Antimony Method 29 3 240 0 CS3&4 Arsenic Method 29 3 240 0 CS3&4 Cadmium Method 29 3 240 0 CS3&4 Cobalt Method 29 3 240 0 CS3&4 Manganese Method 29 3 240 0 CS3&4 Nickel Method 29 3 240 0 CS3&4 Phosphorus (yellow or white)Method 29 3 240 0 CS3&4 Selenium Method 29 3 240 0 CS3&4 Mercury Method 29 3 240 0 CS3&4 Filterable Particulate Method 29 3 240 0 CS3&4 Chromium Method 29 3 240 0 CS3&4 Co2 Method 3A CO2 6 120 0 CS3&4 O2 Method 3A O2 6 120 0 CS3&4


### Monday, February 14, 2011 Page 3 of 33

### RRI Energy, Shawville Station

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. The HCN was sampled using CTM 033 with 2 Normal NaOH and an additional I impinger for one hour per the clarification given by the USEPA.



### Monday, February 14, 2011 Page 4 of 33

### RRI Energy, Shawville Station

Sampling / Stack Data Results Summary



### Location CS3&4 - Method 10 Average Run Number 1 2 3
Test Date 6/8/2010 6/8/2010 6/8/2010 Run Start Time 9:00:00 AM 12:15:00 PM 2:45:00 PM

Run Finish Time 11:12:00 AM2:21:00 PM 4:54:00 PM Carbon Dioxide, % 11.4 11.3 11.2 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Dry Volumetric Flow Rate, dry scfm 951405 948263 948582949,416.667 F-Factor, dscfm/MMBtu @ %O2 9736 9786 9779 9,767.000 Moisture, % 5.4 4.98 5.09 5.157 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location CS3&4 - Method 23 Average Run Number 1 2 3
Test Date 6/7/2010 6/9/2010 6/9/2010 Run Start Time 8:05:00 AM 6:30:00 AM 2:41:00 PM

Run Finish Time 4:16:00 PM2:40:00 PM10:49:00 PM Net Run Time, minutes 480 480 480 Dry Gas Meter Volume Sampled, dscf 294.731 299.308 293.673 295.904 Moisture Content of Stack Gas, % 5.73 5.69 5.03 5.483 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 10.9 10.9 10.9 10.900 Oxygen, % 8.6 8.6 8.8 8.667 Average Stack Gas Temperature, °F 260.28 262.83 259.80 260.970 Dry Volumetric Flow Rate, dry scfm 888,402.2 901,616.3 889,033.0 893,017.167 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,361,109.31,379,311.9 1,344,948.21,361,789.80 0 Percent Isokinetic of Sampling Rate, % 99.5 99.6 99.1 99.400 F-Factor, dscfm/MMBtu @ %O2 9716 9812 9778 9,768.667
Fw 10549 10678 10625 10,617.333
Fc 1796 1812 1802 1,803.333



### Monday, February 14, 2011 Page 5 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 25A Average Run Number 1 2 3
Test Date 6/8/2010 6/8/2010 6/8/2010 Run Start Time 9:00:00 AM 12:15:00 PM 2:45:00 PM

Run Finish Time 11:14:00 AM2:20:00 PM 4:54:00 PM Carbon Dioxide, % 11.4 11.3 11.2 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Dry Volumetric Flow Rate, dry scfm 951405 948263 948582949,416.667 F-Factor, dscfm/MMBtu @ %O2 9736 9786 9779 9,767.000 Moisture, % 5.4 4.98 5.09 5.157 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location CS3&4 - Method 26A Average Run Number 1 2 3
Test Date 6/2/2010 6/2/2010 6/2/2010 Run Start Time 8:00:00 AM 11:20:00 AM 2:40:00 PM

Run Finish Time 11:07:00 AM2:28:00 PM 5:53:00 PM Net Run Time, minutes 180 180 180 Dry Gas Meter Volume Sampled, dscf 109.845 108.880 110.255 109.660 Moisture Content of Stack Gas, % 6.40 6.47 6.38 6.417 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 11.2 11.4 11.5 11.367 Oxygen, % 8.8 8.7 9 8.833 Average Stack Gas Temperature, °F 256.20 264.15 269.65 263.333 Dry Volumetric Flow Rate, dry scfm 876,400.6 867,556.9 878,627.4 874,194.967 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,343,247.01,345,458.5 1,371,656.61,353,454.03 3 Percent Isokinetic of Sampling Rate, % 100.3 100.4 100.4 100.367 F-Factor, dscfm/MMBtu @ %O2 9779 9742 9747 9,756.000
Fw 10694 10636 10634 10,654.667
Fc 1808 1802 1801 1,803.667



### Monday, February 14, 2011 Page 6 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 29 Average Run Number 1 2 3
Test Date 6/3/2010 6/3/2010 6/4/2010 Run Start Time 6:50:00 AM1:35:00 PM 8:40:00 AM
Run Finish Time 11:25:00 AM5:46:00 PM12:34:00 PM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 147.672 148.056 147.383 147.704 Moisture Content of Stack Gas, % 7.16 6.75 7.27 7.060 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 11.4 11.2 11.3 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Average Stack Gas Temperature, °F 266.88 275.43 274.53 272.280 Dry Volumetric Flow Rate, dry scfm 878,082.4 882,418.2 874,413.3 878,304.633 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,384,415.41,401,427.1 1,394,792.61,393,545.03 3 Percent Isokinetic of Sampling Rate, % 100.9 100.7 101.1 100.900 F-Factor, dscfm/MMBtu @ %O2 9723 9778 9766 9,755.667
Fw 10596 10668 10678 10,647.333
Fc 1802 1809 1800 1,803.667



### Location CS3&4 - Method 3A CO2 Average Run Number 1 2 3
Test Date 6/2/2010 6/2/2010 6/2/2010 Run Start Time 8:00:00 AM 11:20:00 AM 2:40:00 PM

Run Finish Time 11:00:00 AM2:20:00 PM 5:45:00 PM Carbon Dioxide, % 11.2 11.4 11.5 11.367 Oxygen, % 8.8 8.7 9 8.833 Dry Volumetric Flow Rate, dry scfm 936291 927664 938133 934,029.333 F-Factor, dscfm/MMBtu @ %O2 9779 9741 9747 9,755.667 Moisture, % 6.4 6.47 6.38 6.417 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 7 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A CO2 3 Average Run Number 4 5 6
Test Date 6/3/2010 6/3/2010 6/4/2010 Run Start Time 6:15:00 AM 12:45:00 PM 7:49:00 AM

Run Finish Time 12:15:00 PM6:35:00 PM 1:35:00 PM Carbon Dioxide, % 11.4 11.2 11.3 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Dry Volumetric Flow Rate, dry scfm 921751 918395 919981 920,042.333 F-Factor, dscfm/MMBtu @ %O2 9723 9778 9766 9,755.667 Moisture, % 6.15 6.43 5.73 6.103 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location CS3&4 - Method 3A CO2 3 6 Average Run Number 7 8 9
Test Date 6/8/2010 6/8/2010 6/8/2010 Run Start Time 9:00:00 AM 12:15:00 PM 2:45:00 PM

Run Finish Time 11:12:00 AM2:21:00 PM 4:54:00 PM Carbon Dioxide, % 11.4 11.3 11.2 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Dry Volumetric Flow Rate, dry scfm 951405 948263 948582949,416.667 F-Factor, dscfm/MMBtu @ %O2 9736 9786 9779 9,767.000 Moisture, % 5.4 4.98 5.09 5.157 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 8 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A O2 Average Run Number 1 2 3
Test Date 6/2/2010 6/2/2010 6/2/2010 Run Start Time 8:00:00 AM 11:20:00 AM 2:40:00 PM

Run Finish Time 11:00:00 AM2:20:00 PM 5:45:00 PM Carbon Dioxide, % 11.2 11.4 11.5 11.367 Oxygen, % 8.8 8.7 9 8.833 Dry Volumetric Flow Rate, dry scfm 936291 927664 938133 934,029.333 F-Factor, dscfm/MMBtu @ %O2 9779 9741 9747 9,755.667 Moisture, % 6.4 6.47 6.38 6.417 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location CS3&4 - Method 3A O2 3 Average Run Number 4 5 6
Test Date 6/3/2010 6/3/2010 6/4/2010 Run Start Time 6:15:00 AM 12:45:00 PM 7:49:00 AM

Run Finish Time 12:15:00 PM6:35:00 PM 1:35:00 PM Carbon Dioxide, % 11.4 11.2 11.3 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Dry Volumetric Flow Rate, dry scfm 921751 918395 919981 920,042.333 F-Factor, dscfm/MMBtu @ %O2 9723 9778 9766 9,755.667 Moisture, % 6.15 6.43 5.73 6.103 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Monday, February 14, 2011 Page 9 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A O2 3 6 Average Run Number 7 8 9
Test Date 6/8/2010 6/8/2010 6/8/2010 Run Start Time 9:00:00 AM 12:15:00 PM 2:45:00 PM

Run Finish Time 11:12:00 AM2:21:00 PM 4:54:00 PM Carbon Dioxide, % 11.4 11.3 11.2 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Dry Volumetric Flow Rate, dry scfm 951405 948263 948582949,416.667 F-Factor, dscfm/MMBtu @ %O2 9736 9786 9779 9,767.000 Moisture, % 5.4 4.98 5.09 5.157 Fuel Type Override Override Override
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Location CS3&4 - OTM - 27/28 Average Run Number 1 2 3
Test Date 6/3/2010 6/3/2010 6/4/2010 Run Start Time 6:15:00 AM 12:45:00 PM 7:55:00 AM

Run Finish Time 11:51:00 AM6:25:00 PM 1:32:00 PM Net Run Time, minutes 329 329 329 Dry Gas Meter Volume Sampled, dscf 116.088 114.605 114.687 115.127 Moisture Content of Stack Gas, % 6.14 6.42 5.73 6.097 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 11.4 11.2 11.3 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Average Stack Gas Temperature, °F 265.92 273.33 267.92 269.057 Dry Volumetric Flow Rate, dry scfm 865,528.6 859,509.2 867,686.8 864,241.533 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,348,010.31,356,346.0 1,349,201.11,351,185.80 0 Percent Isokinetic of Sampling Rate, % 108.1 107.5 106.6 107.400 F-Factor, dscfm/MMBtu @ %O2 9723 9778 9766 9,755.667
Fw 10596 10668 10678 10,647.333
Fc 1802 1809 1800 1,803.667



### Monday, February 14, 2011 Page 10 of 33

### RRI Energy, Shawville Station

Emissions Summary



### Location: CS3&4 - Method 10 Compound: Carbon Monoxide Average Run 1 2 3 lb/mmBtuO2 1.00E-02 9.36E-03 9.29E-03 0.010 ppm 8.29E+00 7.74E+00 7.69E+00 7.907 ppm@7%O2 9.45E+00 8.75E+00 8.69E+00 8.963



### Location: CS3&4 - Method 23 Compound: 1,2,3,4,6,7,8-HpCDD Average RunNumber 1 2 3 Mass_mg 0.0000000054 0.0000000064 0.0000000033 0.000 lb/mmBtuO2 6.67E-13 7.86E-13 4.18E-13 0.000 ng/dscm 6.47E-04 7.55E-04 3.97E-04 0.001 ng/dscm@7%O2 7.31E-04 8.53E-04 4.56E-04 0.001 

### Compound: 1,2,3,4,6,7,8-HpCDF Average RunNumber 1 2 3 Mass_mg 0.000000014 0.00000003 0.0000000052 0.000 lb/mmBtuO2 1.73E-12 3.68E-12 6.59E-13 0.000 ng/dscm 1.68E-03 3.54E-03 6.25E-04 0.002 ng/dscm@7%O2 1.90E-03 4.00E-03 7.18E-04 0.002 

### Compound: 1,2,3,4,7,8,9-HpCDF Average RunNumber 1 2 3 Mass_mg 0.0000000031 0.0000000075 0.0000000017 0.000 lb/mmBtuO2 3.83E-13 9.21E-13 2.16E-13 0.000 ng/dscm 3.71E-04 8.85E-04 2.04E-04 0.000 ng/dscm@7%O2 4.19E-04 1.00E-03 2.34E-04 0.001 

### Compound: 1,2,3,4,7,8-HxCDD Average RunNumber 1 2 3 Mass_mg 0.0000000013 0.0000000036 0.0000000011 0.000 lb/mmBtuO2 1.61E-13 4.42E-13 1.39E-13 0.000 ng/dscm 1.56E-04 4.25E-04 1.32E-04 0.000 ng/dscm@7%O2 1.76E-04 4.80E-04 1.52E-04 0.000 

### Compound: 1,2,3,4,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.0000000012 0.0000000031 0.0000000012 0.000 lb/mmBtuO2 1.48E-13 3.81E-13 1.52E-13 0.000 ng/dscm 1.44E-04 3.66E-04 1.44E-04 0.000 ng/dscm@7%O2 1.63E-04 4.14E-04 1.65E-04 0.000 

### Compound: 1,2,3,6,7,8-HxCDD Average


### Monday, February 14, 2011 Page 11 of 33

### RRI Energy, Shawville Station

RunNumber 1 2 3 Mass_mg 0.0000000013 0.0000000035 0.0000000011 0.000 lb/mmBtuO2 1.61E-13 4.30E-13 1.39E-13 0.000 ng/dscm 1.56E-04 4.13E-04 1.32E-04 0.000 ng/dscm@7%O2 1.76E-04 4.67E-04 1.52E-04 0.000 

### Compound: 1,2,3,6,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.0000000015 0.0000000028 0.0000000008 0.000 lb/mmBtuO2 1.85E-13 3.44E-13 1.01E-13 0.000 ng/dscm 1.80E-04 3.30E-04 9.62E-05 0.000 ng/dscm@7%O2 2.03E-04 3.73E-04 1.11E-04 0.000 

### Compound: 1,2,3,7,8,9-HxCDD Average RunNumber 1 2 3 Mass_mg 0.0000000013 0.0000000035 0.0000000011 0.000 lb/mmBtuO2 1.61E-13 4.30E-13 1.39E-13 0.000 ng/dscm 1.56E-04 4.13E-04 1.32E-04 0.000 ng/dscm@7%O2 1.76E-04 4.67E-04 1.52E-04 0.000 

### Compound: 1,2,3,7,8,9-HxCDF Average RunNumber 1 2 3 Mass_mg 0.0000000013 0.0000000034 0.00000000097 0.000 lb/mmBtuO2 1.61E-13 4.18E-13 1.23E-13 0.000 ng/dscm 1.56E-04 4.01E-04 1.17E-04 0.000 ng/dscm@7%O2 1.76E-04 4.53E-04 1.34E-04 0.000 

### Compound: 1,2,3,7,8-PeCDD Average RunNumber 1 2 3 Mass_mg 0.0000000026 0.0000000051 0.0000000049 0.000 lb/mmBtuO2 3.21E-13 6.26E-13 6.21E-13 0.000 ng/dscm 3.12E-04 6.02E-04 5.89E-04 0.001 ng/dscm@7%O2 3.53E-04 6.80E-04 6.77E-04 0.001 

### Compound: 1,2,3,7,8-PeCDF Average RunNumber 1 2 3 Mass_mg 0.0000000035 0.0000000043 0.0000000011 0.000 lb/mmBtuO2 4.32E-13 5.28E-13 1.39E-13 0.000 ng/dscm 4.19E-04 5.07E-04 1.32E-04 0.000 ng/dscm@7%O2 4.74E-04 5.73E-04 1.52E-04 0.000 

### Compound: 2,3,3',4,4',5,5'-HpCB (PCB189) Average RunNumber 1 2 3 Mass_mg 0.0000000164 0.000000011 0.0000000131 0.000 lb/mmBtuO2 2.03E-12 1.35E-12 1.66E-12 0.000 ng/dscm 1.97E-03 1.30E-03 1.58E-03 0.002 ng/dscm@7%O2 2.23E-03 1.47E-03 1.82E-03 0.002



### Monday, February 14, 2011 Page 12 of 33

### RRI Energy, Shawville Station

Compound: 2,3,3',4,4',5/2,3,3',4,4',5'-HxCB (PC Average RunNumber 1 2 3 Mass_mg 0.000001076 0.0000000326 0.000000324 0.000 lb/mmBtuO2 1.33E-10 4.00E-12 4.11E-11 0.000 ng/dscm 1.29E-01 3.85E-03 3.90E-02 0.057 ng/dscm@7%O2 1.46E-01 4.35E-03 4.48E-02 0.065 

### Compound: 2,3,3',4,4'-PeCB (PCB105) Average RunNumber 1 2 3 Mass_mg 0.00000507 0.000001586 0.00000176 0.000 lb/mmBtuO2 6.26E-10 1.95E-10 2.23E-10 0.000 ng/dscm 6.08E-01 1.87E-01 2.12E-01 0.336 ng/dscm@7%O2 6.87E-01 2.11E-01 2.44E-01 0.381 

### Compound: 2,3',4,4',5,5'-HxCB (PCB167) Average RunNumber 1 2 3 Mass_mg 0.000000296 0.0000000776 0.000000072 0.000 lb/mmBtuO2 3.66E-11 9.53E-12 9.13E-12 0.000 ng/dscm 3.55E-02 9.16E-03 8.66E-03 0.018 ng/dscm@7%O2 4.01E-02 1.04E-02 9.95E-03 0.020 

### Compound: 2,3,4,4',5-PeCB (PCB114) Average RunNumber 1 2 3 Mass_mg 0.000000276 0.0000000951 0.000000097 0.000 lb/mmBtuO2 3.41E-11 1.17E-11 1.23E-11 0.000 ng/dscm 3.31E-02 1.12E-02 1.17E-02 0.019 ng/dscm@7%O2 3.74E-02 1.27E-02 1.34E-02 0.021 

### Compound: 2,3',4,4',5-PeCB (PCB118) Average RunNumber 1 2 3 Mass_mg 0.00001693 0.00000512 0.0000057 0.000 lb/mmBtuO2 2.09E-09 6.29E-10 7.23E-10 0.000 ng/dscm 2.03E+00 6.04E-01 6.86E-01 1.107 ng/dscm@7%O2 2.29E+00 6.83E-01 7.88E-01 1.254 

### Compound: 2',3,4,4',5-PeCB (PCB123) Average RunNumber 1 2 3 Mass_mg 0.000000372 0.0000001018 0.000000085 0.000 lb/mmBtuO2 4.59E-11 1.25E-11 1.08E-11 0.000 ng/dscm 4.46E-02 1.20E-02 1.02E-02 0.022 ng/dscm@7%O2 5.04E-02 1.36E-02 1.17E-02 0.025 

### Compound: 2,3,4,6,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.0000000012 0.0000000029 0.00000000085 0.000 lb/mmBtuO2 1.48E-13 3.56E-13 1.08E-13 0.000



### Monday, February 14, 2011 Page 13 of 33

### RRI Energy, Shawville Station

ng/dscm 1.44E-04 3.42E-04 1.02E-04 0.000 ng/dscm@7%O2 1.63E-04 3.86E-04 1.17E-04 0.000 

### Compound: 2,3,4,7,8-PeCDF Average RunNumber 1 2 3 Mass_mg 0.0000000032 0.0000000044 0.0000000021 0.000 lb/mmBtuO2 3.95E-13 5.40E-13 2.66E-13 0.000 ng/dscm 3.83E-04 5.19E-04 2.53E-04 0.000 ng/dscm@7%O2 4.33E-04 5.87E-04 2.91E-04 0.000 

### Compound: 2,3,7,8-TCDD Average RunNumber 1 2 3 Mass_mg 0.0000000033 0.0000000079 0.0000000025 0.000 lb/mmBtuO2 4.08E-13 9.70E-13 3.17E-13 0.000 ng/dscm 3.95E-04 9.32E-04 3.01E-04 0.001 ng/dscm@7%O2 4.46E-04 1.05E-03 3.46E-04 0.001 

### Compound: 2,3,7,8-TCDF Average RunNumber 1 2 3 Mass_mg 0.0000000023 0.0000000054 0.0000000014 0.000 lb/mmBtuO2 2.84E-13 6.63E-13 1.78E-13 0.000 ng/dscm 2.76E-04 6.37E-04 1.68E-04 0.000 ng/dscm@7%O2 3.12E-04 7.20E-04 1.93E-04 0.000 

### Compound: 3,3',4,4',5,5'-HxCB (PCB169) Average RunNumber 1 2 3 Mass_mg 0.000000052 0.0000000158 0.0000000187 0.000 lb/mmBtuO2 6.42E-12 1.94E-12 2.37E-12 0.000 ng/dscm 6.23E-03 1.86E-03 2.25E-03 0.003 ng/dscm@7%O2 7.04E-03 2.10E-03 2.58E-03 0.004 

### Compound: 3,3',4,4',5-PeCB (PCB126) Average RunNumber 1 2 3 Mass_mg 0.0000002663 0.0000000621 0.0000000542 0.000 lb/mmBtuO2 3.29E-11 7.63E-12 6.87E-12 0.000 ng/dscm 3.19E-02 7.33E-03 6.52E-03 0.015 ng/dscm@7%O2 3.60E-02 8.28E-03 7.49E-03 0.017 

### Compound: 3,3',4,4'-TCB (PCB77) Average RunNumber 1 2 3 Mass_mg 0.000006241 0.0000015063 0.000001443 0.000 lb/mmBtuO2 7.71E-10 1.85E-10 1.83E-10 0.000 ng/dscm 7.48E-01 1.78E-01 1.74E-01 0.367 ng/dscm@7%O2 8.45E-01 2.01E-01 2.00E-01 0.415 

### Compound: 3,4,4',5-TCB (PCB81) Average RunNumber 1 2 3


### Monday, February 14, 2011 Page 14 of 33

### RRI Energy, Shawville Station

Mass_mg 0.0000002175 0.0000000502 0.0000000559 0.000 lb/mmBtuO2 2.69E-11 6.16E-12 7.09E-12 0.000 ng/dscm 2.61E-02 5.92E-03 6.72E-03 0.013 ng/dscm@7%O2 2.95E-02 6.69E-03 7.72E-03 0.015 

### Compound: OCDD Average RunNumber 1 2 3 Mass_mg 0.000000018 0.000000017 0.000000012 0.000 lb/mmBtuO2 2.22E-12 2.09E-12 1.52E-12 0.000 ng/dscm 2.16E-03 2.01E-03 1.44E-03 0.002 ng/dscm@7%O2 2.44E-03 2.27E-03 1.65E-03 0.002 

### Compound: OCDF Average RunNumber 1 2 3 Mass_mg 0.000000013 0.000000013 0.000000011 0.000 lb/mmBtuO2 1.61E-12 1.60E-12 1.39E-12 0.000 ng/dscm 1.56E-03 1.53E-03 1.32E-03 0.001 ng/dscm@7%O2 1.76E-03 1.73E-03 1.52E-03 0.002 

### Compound: Total HpCDD Average RunNumber 1 2 3 Mass_mg 0.00000001 0.0000000064 0.0000000074 0.000 lb/mmBtuO2 1.23E-12 7.86E-13 9.38E-13 0.000 ng/dscm 1.20E-03 7.55E-04 8.90E-04 0.001 ng/dscm@7%O2 1.36E-03 8.53E-04 1.02E-03 0.001 

### Compound: Total HpCDF Average RunNumber 1 2 3 Mass_mg 0.000000019 0.00000003 0.0000000052 0.000 lb/mmBtuO2 2.35E-12 3.68E-12 6.59E-13 0.000 ng/dscm 2.28E-03 3.54E-03 6.25E-04 0.002 ng/dscm@7%O2 2.58E-03 4.00E-03 7.18E-04 0.002 

### Compound: Total HxCDD Average RunNumber 1 2 3 Mass_mg 0.000000034 0.00000003 0.000000014 0.000 lb/mmBtuO2 4.20E-12 3.68E-12 1.78E-12 0.000 ng/dscm 4.07E-03 3.54E-03 1.68E-03 0.003 ng/dscm@7%O2 4.60E-03 4.00E-03 1.93E-03 0.004 

### Compound: Total HxCDF Average RunNumber 1 2 3 Mass_mg 0.000000018 0.000000021 0.000000017 0.000 lb/mmBtuO2 2.22E-12 2.58E-12 2.16E-12 0.000 ng/dscm 2.16E-03 2.48E-03 2.04E-03 0.002 ng/dscm@7%O2 2.44E-03 2.80E-03 2.34E-03 0.003



### Monday, February 14, 2011 Page 15 of 33

### RRI Energy, Shawville Station

Compound: Total PeCDD Average RunNumber 1 2 3 Mass_mg 0.000000032 0.00000002 0.000000039 0.000 lb/mmBtuO2 3.95E-12 2.46E-12 4.94E-12 0.000 ng/dscm 3.83E-03 2.36E-03 4.69E-03 0.004 ng/dscm@7%O2 4.33E-03 2.67E-03 5.39E-03 0.004 

### Compound: Total PeCDF Average RunNumber 1 2 3 Mass_mg 0.000000024 0.000000012 0.000000022 0.000 lb/mmBtuO2 2.96E-12 1.47E-12 2.79E-12 0.000 ng/dscm 2.88E-03 1.42E-03 2.65E-03 0.002 ng/dscm@7%O2 3.25E-03 1.60E-03 3.04E-03 0.003 

### Compound: Total TCDD Average RunNumber 1 2 3 Mass_mg 0.000000033 0.000000018 0.0000000088 0.000 lb/mmBtuO2 4.08E-12 2.21E-12 1.12E-12 0.000 ng/dscm 3.95E-03 2.12E-03 1.06E-03 0.002 ng/dscm@7%O2 4.46E-03 2.40E-03 1.22E-03 0.003 

### Compound: Total TCDF Average RunNumber 1 2 3 Mass_mg 0.000000008 0.0000000031 0.000000011 0.000 lb/mmBtuO2 9.88E-13 3.81E-13 1.39E-12 0.000 ng/dscm 9.59E-04 3.66E-04 1.32E-03 0.001 ng/dscm@7%O2 1.08E-03 4.14E-04 1.52E-03 0.001



### Location: CS3&4 - Method 25A Compound: Total organic compounds (TOC) as Average Run 1 2 3 lb/mmBtuO2 6.83E-04 7.31E-04 9.95E-04 0.001 ppm 3.58E-01 3.84E-01 5.23E-01 0.422 ppm@7%O2 4.08E-01 4.34E-01 5.91E-01 0.478



### Location: CS3&4 - Method 26A Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 45.5 49.1 60.2 51.600 lb/mmBtuO2 1.54E-02 1.66E-02 2.06E-02 0.018 

### Compound: Hydrogen Chloride Average RunNumber 1 2 3 Mass_mg 260.064 260.884 267.584 262.844 lb/mmBtuO2 8.82E-02 8.82E-02 9.16E-02 0.089



### Monday, February 14, 2011 Page 16 of 33

### RRI Energy, Shawville Station

Compound: Hydrogen Fluoride Average RunNumber 1 2 3 Mass_mg 22.4136 23.4726 23.1136 23.000 lb/mmBtuO2 7.60E-03 7.93E-03 7.91E-03 0.008



### Location: CS3&4 - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.00085 0.06975 0.06855 0.046 lb/mmBtuO2 2.11E-07 1.73E-05 1.70E-05 0.000 

### Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.0326 1.65882 1.62882 1.107 lb/mmBtuO2 8.11E-06 4.10E-04 4.04E-04 0.000 

### Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.00064 0.00113 0.00112 0.001 lb/mmBtuO2 1.59E-07 2.80E-07 2.78E-07 0.000 

### Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.001 0.001217 0.001 0.001 lb/mmBtuO2 2.49E-07 3.01E-07 2.48E-07 0.000 

### Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.0017 0.013 0.0065 0.007 lb/mmBtuO2 4.23E-07 3.22E-06 1.61E-06 0.000 

### Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.0005 0.00352 0.001 0.002 lb/mmBtuO2 1.24E-07 8.71E-07 2.48E-07 0.000 

### Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 41 76.5 52.4 56.633 lb/mmBtuO2 1.02E-02 1.89E-02 1.30E-02 0.014 

### Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.3714 0.076 0.2612 0.236


### Monday, February 14, 2011 Page 17 of 33

### RRI Energy, Shawville Station

lb/mmBtuO2 9.24E-05 1.88E-05 6.48E-05 0.000 

### Compound: Manganese Average RunNumber 1 2 3 Mass_mg 0.00627 0.07977 0.07827 0.055 lb/mmBtuO2 1.56E-06 1.97E-05 1.94E-05 0.000 

### Compound: Mercury Average RunNumber 1 2 3 Mass_mg 0.112525 0.115285 0.134205 0.121 lb/mmBtuO2 2.80E-05 2.85E-05 3.33E-05 0.000 

### Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0 0.0045 0 0.002 lb/mmBtuO2 0.00E+00 1.11E-06 0.00E+00 0.000 

### Compound: Phosphorus (yellow or white) Average RunNumber 1 2 3 Mass_mg 0.1435 0.6274 0.5674 0.446 lb/mmBtuO2 3.57E-05 1.55E-04 1.41E-04 0.000 

### Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.477 0.4559 0.5882 0.507 lb/mmBtuO2 1.19E-04 1.13E-04 1.46E-04 0.000



### Location: CS3&4 - OTM - 27/28 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 26.6 25.6 25.7 25.967 lb/mmBtuO2 8.41E-03 8.18E-03 8.20E-03 0.008 

### Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 21.6 10.3 9.9 13.933 lb/mmBtuO2 6.83E-03 3.29E-03 3.16E-03 0.004 

### Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 11 11.8 9.6 10.800 lb/mmBtuO2 3.48E-03 3.77E-03 3.06E-03 0.003 

### Compound: Organic Condensible Particulate Average



### Monday, February 14, 2011 Page 18 of 33

### RRI Energy, Shawville Station

Process Run Data RunNumber 1 2 3 Mass_mg 4.9 4.9 4.3 4.700 lb/mmBtuO2 1.55E-03 1.57E-03 1.37E-03 0.001 

### Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 42.5 42.3 39.6 41.467 lb/mmBtuO2 1.34E-02 1.35E-02 1.26E-02 0.013 

### Compound: Total PM2.5 Average RunNumber 1 2 3 Mass_mg 37.5 27 23.8 29.433 lb/mmBtuO2 1.19E-02 8.63E-03 7.59E-03 0.009



### Monday, February 14, 2011 Page 19 of 33

### RRI Energy, Shawville Station

Process Run Data



### Run Name Value UOM Comments Target Value 1 Heat Input 2945.4 mmBtu/hr 2900


### 1 Steam Flow 2273.2 klb/hr 2200
1 Net MW 303 NMW 300
1 Gross MW 327.6 GMW 320


### 2 Heat Input 2967.2 mmBtu/hr 2900
2 Steam Flow 2289.1 klb/hr 2200
2 Net MW 305.6 NMW 300


### 2 Gross MW 327.8 GMW 320
3 Heat Input 2923.5 mmBtu/hr 2900
3 Steam Flow 2227.2 klb/hr 2200


### 3 Net MW 301.8 NMW 300
3 Gross MW 327.9 GMW 320
4 Heat Input 2920.9 mmBtu/hr 2900


### 4 Steam Flow 2269.5 klb/hr 2200
4 Net MW 305.8 NMW 300
4 Gross MW 327.9 GMW 320


### 5 Heat Input 2967.8 mmBtu/hr 2900
5 Steam Flow 2263.8 klb/hr 2200
5 Net MW 298.6 NMW 300


### 5 Gross MW 324.2 GMW 320
6 Heat Input 2968.8 mmBtu/hr 2900
6 Steam Flow 2255.1 klb/hr 2200


### 6 Net MW 306.4 NMW 300
6 Gross MW 328.7 GMW 320


### 7 Heat Input 2934.5 mmBtu/hr 2900
7 Steam Flow 2274.6 klb/hr 2200
7 Net MW 305 NMW 300


### 7 Gross MW 328.6 GMW 320
8 Heat Input 2947.3 mmBtu/hr 2900
8 Steam Flow 2280.6 klb/hr 2200


### 8 Net MW 305.6 NMW 300
8 Gross MW 327.9 GMW 320
9 Heat Input 2957.9 mmBtu/hr 2900



### Monday, February 14, 2011 Page 20 of 33

### RRI Energy, Shawville Station

APCD Run Data

Process Lab Run Data 9 Steam Flow 2297.3 klb/hr 2200


### 9 Net MW 305.4 NMW 300
9 Gross MW 328 GMW 320
10Heat Input 2971.5 mmBtu/hr 2900


### 10Steam Flow 2272.3 klb/hr 2200
10Net MW 305.5 NMW 300
10Gross MW 327.6 GMW 320


### 11Heat Input 2977.1 mmBtu/hr 2900
11Steam Flow 2281.4 klb/hr 2200
11Net MW 306 NMW 300


### 11Gross MW 327.6 GMW 320
12Heat Input 2990.8 mmBtu/hr 2900
12Steam Flow 2287.8 klb/hr 2200


### 12Net MW 306 NMW 300
12Gross MW 327.5 GMW 320

Run Name Value UOM Comments Target Value 

### 1 Low Nox Burners 0 0
1 Precipitators 0 0

Monday, February 14, 2011 Page 21 of 33

### RRI Energy, Shawville Station

Sampling / Stack Data Results Detail



### Location CS3&4 - Method 10 Average Run Number 1 2 3 Test Date 6/8/2010 6/8/2010 6/8/2010 Run Start Time 9:00:00 AM12:15:00 PM 2:45:00 PM Run Finish Time 11:12:00 AM2:21:00 PM 4:54:00 PM Carbon Dioxide, % 11.4 11.3 11.2 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Fuel Factor 1.07 1.09 1.1 Dry Volumetric Flow Rate, dry scfm 951405 948263 948582949,416.667 F-Factor, dscfm/MMBtu @ %O2 9736 9786 9779 9,767.000 Moisture, % 5.4 4.98 5.09 5.157 Analyzer Make Thermo Env.Thermo Env.Thermo Env. Analyzer Model 48 48 48 48.000 Analyzer Serial Number 35982-251 35982-251 35982-251 Operating Range 50.5 50.5 50.5 50.500 Operating Units ppm ppm ppm No. Readings/Avg. 120 120 120 120.000 Calibration Set 2 2 2 2.000 Calibration Pre Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Pre Zero Cylinder Instrument Response 0.06 0.12 0.15 0.110 Calibration Pre Zero Cylinder Bias 0.04 0.16 0.22 0.140 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0004212EB0004212 EB0004212 Calibration Pre High Cylinder Instrument Response 25.37 25.42 25.48 25.423 Calibration Pre High Cylinder Bias 0.06 0.16 0.28 0.167 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Post Zero Cylinder Instrument Response 0.12 0.15 0.17 0.147 Calibration Post Zero Cylinder Bias 0.16 0.22 0.26 0.213 Calibration Post Zero Cylinder Drift 0.12 0.06 0.04 0.073 Calibration Post High Cylinder ID EB0004212EB0004212 EB0004212 Calibration Post High Cylinder Instrument Response 25.42 25.48 25.51 25.470 Calibration Post High Cylinder Bias 0.16 0.28 0.34 0.260 Calibration Post High Cylinder Drift 0.1 0.12 0.06 0.093 Cavg 8.38 7.88 7.86 8.040 Cavg Units ppmvd ppmvd ppmvd Cgas 8.2884 7.7404 7.6894 7.906 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 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 23 Average Run Number 1 2 3 Test Date 6/7/2010 6/9/2010 6/9/2010 Run Start Time 8:05:00 AM6:30:00 AM 2:41:00 PM Run Finish Time 4:16:00 PM2:40:00 PM10:49:00 PM Net Traversing Points 40 40 40 Net Run Time, minutes 480 480 480 Nozzle Diameter, inches 0.19 0.19 0.19 0.190 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.996 0.996 0.994 0.995 Barometric Pressure, inches of Mercury 28.32 28.45 28.45 28.407 Average Orifice Meter Differential, inches H2O 1.08 1.07 1.21 1.120 Dry Gas Meter Volume Sampled, cubic feet 320.250 320.180 316.712 319.047 Average Dry Gas Meter Temperature, °F 82.38 76.40 79.88 79.553 Dry Gas Meter Volume Sampled, dscf 294.731 299.308 293.673 295.904 Total Moisture Liquid collected, g 380.2 384 330.5 364.900 Volume of Water Vapor, standard cubic feet 17.90 18.07 15.56 17.177 Moisture Content of Stack Gas, % 5.73 5.69 5.03 5.483 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.9427 0.9431 0.9497 0.945 Carbon Dioxide, % 10.9 10.9 10.9 10.900 Oxygen, % 8.6 8.6 8.8 8.667 Carbon Monoxide & Nitrogen, % 80.5 80.5 80.3 80.433 Fuel Factor 1.13 1.13 1.11 Dry Molecular Weight, lb/lb-Mole 30.09 30.09 30.10 30.093 Wet Molecular weight, lb/lb-Mole 29.40 29.40 29.49 29.430 Flue Gas Static Pressure, inches of H2O -0.8 -0.8 -0.8 -0.800 Absolute Flue Gas Pressure, inches of Mercury 28.26 28.39 28.39 28.347 Average Stack Gas Temperature, °F 260.28 262.83 259.80 260.970 Average Velocity Head, inches of H2O 1.4320634976 4591.472172996

896531.409655492

0662 1.438
Average Stack Gas Velocity, feet/second 80.01 81.08 79.06 80.050 Stack Cross-Sectional Area, square feet 283.529 283.529 283.529 283.529 Dry Volumetric Flow Rate, dry scfm 888,402.2 901,616.3 889,033.0893,017.167 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,361,109.3 1,379,311.9 1,344,948.21,361,789.8 00 Percent Isokinetic of Sampling Rate, % 99.5 99.6 99.1 99.400 Percent Excess Air, % 68.0 68.0 71.0 69.000 F-Factor, dscfm/MMBtu @ %O2 9716 9812 9778 9,768.667 Round Duct Diameter, inches 228 228 228 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10549 10678 1062510,617.333 Fc 1796 1812 1802 1,803.333



### Monday, February 14, 2011 Page 23 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 25A Average Run Number 1 2 3 Test Date 6/8/2010 6/8/2010 6/8/2010 Run Start Time 9:00:00 AM12:15:00 PM 2:45:00 PM Run Finish Time 11:14:00 AM2:20:00 PM 4:54:00 PM Carbon Dioxide, % 11.4 11.3 11.2 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Fuel Factor 1.07 1.09 1.1 Dry Volumetric Flow Rate, dry scfm 951405 948263 948582949,416.667 F-Factor, dscfm/MMBtu @ %O2 9736 9786 9779 9,767.000 Moisture, % 5.4 4.98 5.09 5.157 Analyzer Make CAI CAI CAI Analyzer Model 300 HFID 300 HFID 300 HFID Analyzer Serial Number 27 302006 27 302006 27 302006 Operating Range 51.4 51.4 26.4 43.067 Operating Units ppm ppm ppm No. Readings/Avg. 120 120 120 120.000 Calibration Set 3 3 3 3.000 Calibration Pre Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Pre Zero Cylinder Instrument Response 0.1 0.11 0.05 0.087 Calibration Pre Zero Cylinder Bias 0 0.02 -0.1 -0.027 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0002841EB0002841 EB0002841 Calibration Pre High Cylinder Instrument Response 26.3 26.3 26.1 26.233 Calibration Pre High Cylinder Bias -0.19 -0.19 -0.58 -0.320 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Post Zero Cylinder Instrument Response 0.11 0.05 -0.14 0.007 Calibration Post Zero Cylinder Bias 0.02 -0.1 -0.47 -0.183 Calibration Post Zero Cylinder Drift 0.02 0.12 0.37 0.170 Calibration Post High Cylinder ID EB0002841EB0002841 EB0002841 Calibration Post High Cylinder Instrument Response 26.3 26.1 25.8 26.067 Calibration Post High Cylinder Bias -0.19 -0.58 -1.17 -0.647 Calibration Post High Cylinder Drift 0 0.39 0.59 0.327 Cavg 0.46 0.46 0.47 0.463 Cavg Units ppmvd ppmvd ppmvd Cgas 0.3578 0.3841 0.523 0.422 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 24 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 26A Average Run Number 1 2 3 Test Date 6/2/2010 6/2/2010 6/2/2010 Run Start Time 8:00:00 AM11:20:00 AM 2:40:00 PM Run Finish Time 11:07:00 AM2:28:00 PM 5:53:00 PM Net Traversing Points 20 20 20 Net Run Time, minutes 180 180 180 Nozzle Diameter, inches 0.19 0.19 0.19 0.190 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.994 0.994 0.994 0.994 Barometric Pressure, inches of Mercury 28.35 28.35 28.35 28.350 Average Orifice Meter Differential, inches H2O 1.19 1.23 1.30 1.240 Dry Gas Meter Volume Sampled, cubic feet 117.932 120.114 123.221 120.422 Average Dry Gas Meter Temperature, °F 75.55 90.35 97.65 87.850 Dry Gas Meter Volume Sampled, dscf 109.845 108.880 110.255 109.660 Total Moisture Liquid collected, g 159.5 160 159.5 159.667 Volume of Water Vapor, standard cubic feet 7.51 7.53 7.51 7.517 Moisture Content of Stack Gas, % 6.40 6.47 6.38 6.417 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.936 0.9353 0.9362 0.936 Carbon Dioxide, % 11.2 11.4 11.5 11.367 Oxygen, % 8.8 8.7 9 8.833 Carbon Monoxide & Nitrogen, % 80 79.9 79.5 79.800 Fuel Factor 1.08 1.07 1.03 Dry Molecular Weight, lb/lb-Mole 30.14 30.17 30.20 30.170 Wet Molecular weight, lb/lb-Mole 29.36 29.38 29.42 29.387 Flue Gas Static Pressure, inches of H2O -0.8 -0.8 -0.8 -0.800 Absolute Flue Gas Pressure, inches of Mercury 28.29 28.29 28.29 28.290 Average Stack Gas Temperature, °F 256.20 264.15 269.65 263.333 Average Velocity Head, inches of H2O 1.4020796247 02921.392308570

061821.437890143

12062 1.411
Average Stack Gas Velocity, feet/second 78.96 79.09 80.63 79.560 Stack Cross-Sectional Area, square feet 283.529 283.529 283.529 283.529 Dry Volumetric Flow Rate, dry scfm 876,400.6 867,556.9 878,627.4874,194.967 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,343,247.01,345,458.5 1,371,656.61,353,454.0 33 Percent Isokinetic of Sampling Rate, % 100.3 100.4 100.4 100.367 Percent Excess Air, % 71.4 70.2 75.1 72.233 F-Factor, dscfm/MMBtu @ %O2 9779 9742 9747 9,756.000 Round Duct Diameter, inches 228 228 228 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10694 10636 1063410,654.667 Fc 1808 1802 1801 1,803.667



### Monday, February 14, 2011 Page 25 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 29 Average Run Number 1 2 3 Test Date 6/3/2010 6/3/2010 6/4/2010 Run Start Time 6:50:00 AM1:35:00 PM 8:40:00 AM Run Finish Time 11:25:00 AM5:46:00 PM12:34:00 PM Net Traversing Points 40 40 40 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.19 0.19 0.19 0.190 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.996 0.996 0.996 0.996 Barometric Pressure, inches of Mercury 28.2 28.2 28.2 28.200 Average Orifice Meter Differential, inches H2O 1.09 1.14 1.10 1.110 Dry Gas Meter Volume Sampled, cubic feet 161.333 165.330 162.490 163.051 Average Dry Gas Meter Temperature, °F 83.05 95.13 88.03 88.737 Dry Gas Meter Volume Sampled, dscf 147.672 148.056 147.383 147.704 Total Moisture Liquid collected, g 242 227.5 245.5 238.333 Volume of Water Vapor, standard cubic feet 11.39 10.71 11.56 11.220 Moisture Content of Stack Gas, % 7.16 6.75 7.27 7.060 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.9284 0.9325 0.9273 0.929 Carbon Dioxide, % 11.4 11.2 11.3 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Carbon Monoxide & Nitrogen, % 79.9 80.2 80.1 80.067 Fuel Factor 1.07 1.10 1.09 Dry Molecular Weight, lb/lb-Mole 30.17 30.14 30.15 30.153 Wet Molecular weight, lb/lb-Mole 29.30 29.32 29.27 29.297 Flue Gas Static Pressure, inches of H2O -0.8 -0.8 -0.8 -0.800 Absolute Flue Gas Pressure, inches of Mercury 28.14 28.14 28.14 28.140 Average Stack Gas Temperature, °F 266.88 275.43 274.53 272.280 Average Velocity Head, inches of H2O 1.4568733629 41941.476330295

835051.461890256

49406 1.465
Average Stack Gas Velocity, feet/second 81.38 82.38 81.99 81.917 Stack Cross-Sectional Area, square feet 283.529 283.529 283.529 283.529 Dry Volumetric Flow Rate, dry scfm 878,082.4 882,418.2 874,413.3878,304.633 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,384,415.41,401,427.1 1,394,792.61,393,545.0 33 Percent Isokinetic of Sampling Rate, % 100.9 100.7 101.1 100.900 Percent Excess Air, % 70.2 68.4 68.5 69.033 F-Factor, dscfm/MMBtu @ %O2 9723 9778 97669,755.667 Round Duct Diameter, inches 228 228 228 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10596 10668 1067810,647.333 Fc 1802 1809 1800 1,803.667



### Monday, February 14, 2011 Page 26 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A CO2 Average Run Number 1 2 3 Test Date 6/2/2010 6/2/2010 6/2/2010 Run Start Time 8:00:00 AM11:20:00 AM 2:40:00 PM Run Finish Time 11:00:00 AM2:20:00 PM 5:45:00 PM Carbon Dioxide, % 11.2 11.4 11.5 11.367 Oxygen, % 8.8 8.7 9 8.833 Fuel Factor 1.08 1.07 1.03 Dry Volumetric Flow Rate, dry scfm 936291 927664 938133934,029.333 F-Factor, dscfm/MMBtu @ %O2 9779 9741 9747 9,755.667 Moisture, % 6.4 6.47 6.38 6.417 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/119401415C/119 401415C/1194
Operating Range 18.2 18.2 18.2 18.200 Operating Units % % % No. Readings/Avg. 180 180 180 180.000 Calibration Set 4 4 4 4.000 Calibration Pre Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Pre Zero Cylinder Instrument Response 0.09 0.07 0.01 0.057 Calibration Pre Zero Cylinder Bias 0.27 0.16 -0.16 0.090 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0015430_C O2EB0015430_

CO2EB0015430_

CO2 Calibration Pre High Cylinder Instrument Response 10.07 10.03 9.98 10.027 Calibration Pre High Cylinder Bias -0.22 -0.44 -0.71 -0.457 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Post Zero Cylinder Instrument Response 0.07 0.01 0.13 0.070 Calibration Post Zero Cylinder Bias 0.16 -0.16 0.49 0.163 Calibration Post Zero Cylinder Drift 0.11 0.32 0.65 0.360 Calibration Post High Cylinder ID EB0015430_C O2EB0015430_

CO2EB0015430_

CO2 Calibration Post High Cylinder Instrument Response 10.03 9.98 10.09 10.033 Calibration Post High Cylinder Bias -0.44 -0.71 -0.11 -0.420 Calibration Post High Cylinder Drift 0.22 0.27 0.6 0.363 Cavg 11.16 11.24 11.44 11.280 Cavg Units %vd %vd %vd Cgas 11.2245 11.3517 11.524 11.367 Cgas Units %vd %vd %vd 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 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A CO2 3 Average Run Number 4 5 6 Test Date 6/3/2010 6/3/2010 6/4/2010 Run Start Time 6:15:00 AM12:45:00 PM 7:49:00 AM Run Finish Time 12:15:00 PM6:35:00 PM 1:35:00 PM Carbon Dioxide, % 11.4 11.2 11.3 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Fuel Factor 1.07 1.1 1.09 Dry Volumetric Flow Rate, dry scfm 921751 918395 919981920,042.333 F-Factor, dscfm/MMBtu @ %O2 9723 9778 97669,755.667 Moisture, % 6.15 6.43 5.73 6.103 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/119401415C/119 401415C/1194
Operating Range 18.2 18.2 18.2 18.200 Operating Units % % % No. Readings/Avg. 360 360 360 360.000 Calibration Set 5 5 6 5.333 Calibration Pre Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Pre Zero Cylinder Instrument Response 0.07 0.08 0.1 0.083 Calibration Pre Zero Cylinder Bias -0.11 -0.05 -0.05 -0.070 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0015430_C O2EB0015430_

CO2EB0015430_

CO2 Calibration Pre High Cylinder Instrument Response 10.11 10.15 10.17 10.143 Calibration Pre High Cylinder Bias -0.44 -0.22 0.16 -0.167 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Post Zero Cylinder Instrument Response 0.08 0.14 0.12 0.113 Calibration Post Zero Cylinder Bias -0.05 0.27 0.05 0.090 Calibration Post Zero Cylinder Drift 0.06 0.32 0.1 0.160 Calibration Post High Cylinder ID EB0015430_C O2EB0015430_

CO2EB0015430_

CO2 Calibration Post High Cylinder Instrument Response 10.15 10.2 10.19 10.180 Calibration Post High Cylinder Bias -0.22 0.05 0.27 0.033 Calibration Post High Cylinder Drift 0.22 0.27 0.11 0.200 Cavg 11.44 11.28 11.42 11.380 Cavg Units %vd %vd %vd Cgas 11.4159 11.2088 11.3437 11.323 Cgas Units %vd %vd %vd 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 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A CO2 3 6 Average Run Number 7 8 9 Test Date 6/8/2010 6/8/2010 6/8/2010 Run Start Time 9:00:00 AM12:15:00 PM 2:45:00 PM Run Finish Time 11:12:00 AM2:21:00 PM 4:54:00 PM Carbon Dioxide, % 11.4 11.3 11.2 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Fuel Factor 1.07 1.09 1.1 Dry Volumetric Flow Rate, dry scfm 951405 948263 948582949,416.667 F-Factor, dscfm/MMBtu @ %O2 9736 9786 9779 9,767.000 Moisture, % 5.4 4.98 5.09 5.157 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01415C/119401415C/119 401415C/1194
Operating Range 18.2 18.2 18.2 18.200 Operating Units % % % No. Readings/Avg. 120 120 120 120.000 Calibration Set 7 7 7 7.000 Calibration Pre Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Pre Zero Cylinder Instrument Response 0.14 0.11 0.14 0.130 Calibration Pre Zero Cylinder Bias 0.05 -0.11 0.05 -0.003 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0015289_C O2EB0015289_

CO2EB0015289_

CO2 Calibration Pre High Cylinder Instrument Response 10.56 10.59 10.63 10.593 Calibration Pre High Cylinder Bias 0.66 0.82 1.04 0.840 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Post Zero Cylinder Instrument Response 0.11 0.14 0.17 0.140 Calibration Post Zero Cylinder Bias -0.11 0.05 0.22 0.053 Calibration Post Zero Cylinder Drift 0.16 0.16 0.17 0.163 Calibration Post High Cylinder ID EB0015289_C O2EB0015289_

CO2EB0015289_

CO2 Calibration Post High Cylinder Instrument Response 10.59 10.63 10.66 10.627 Calibration Post High Cylinder Bias 0.82 1.04 1.21 1.023 Calibration Post High Cylinder Drift 0.16 0.22 0.17 0.183 Cavg 8.76 8.75 8.75 8.753 Cavg Units %vd %vd %vd Cgas 8.6763 8.6373 8.6032 8.639 Cgas Units %vd %vd %vd 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 29 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A O2 Average Run Number 1 2 3 Test Date 6/2/2010 6/2/2010 6/2/2010 Run Start Time 8:00:00 AM11:20:00 AM 2:40:00 PM Run Finish Time 11:00:00 AM2:20:00 PM 5:45:00 PM Carbon Dioxide, % 11.2 11.4 11.5 11.367 Oxygen, % 8.8 8.7 9 8.833 Fuel Factor 1.08 1.07 1.03 Dry Volumetric Flow Rate, dry scfm 936291 927664 938133934,029.333 F-Factor, dscfm/MMBtu @ %O2 9779 9741 9747 9,755.667 Moisture, % 6.4 6.47 6.38 6.417 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01420C/119301420C/119 301420C/1193
Operating Range 22.4 22.4 22.4 22.400 Operating Units % % % No. Readings/Avg. 180 180 180 180.000 Calibration Set 8 8 8 8.000 Calibration Pre Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Pre Zero Cylinder Instrument Response 0.05 0.12 0.13 0.100 Calibration Pre Zero Cylinder Bias 0.13 0.45 0.49 0.357 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0004046EB0004046 EB0004046 Calibration Pre High Cylinder Instrument Response 10.02 9.99 10.05 10.020 Calibration Pre High Cylinder Bias 0 -0.13 0.13 0.000 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Post Zero Cylinder Instrument Response 0.12 0.13 0.12 0.123 Calibration Post Zero Cylinder Bias 0.45 0.49 0.45 0.463 Calibration Post Zero Cylinder Drift 0.32 0.04 0.04 0.133 Calibration Post High Cylinder ID EB0004046EB0004046 EB0004046 Calibration Post High Cylinder Instrument Response 9.99 10.05 10.03 10.023 Calibration Post High Cylinder Bias -0.13 0.13 0.04 0.013 Calibration Post High Cylinder Drift 0.13 0.26 0.09 0.160 Cavg 8.79 8.69 9.01 8.830 Cavg Units %vd %vd %vd Cgas 8.784 8.6645 8.9701 8.806 Cgas Units %vd %vd %vd 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 30 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A O2 3 Average Run Number 4 5 6 Test Date 6/3/2010 6/3/2010 6/4/2010 Run Start Time 6:15:00 AM12:45:00 PM 7:49:00 AM Run Finish Time 12:15:00 PM6:35:00 PM 1:35:00 PM Carbon Dioxide, % 11.4 11.2 11.3 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Fuel Factor 1.07 1.1 1.09 Dry Volumetric Flow Rate, dry scfm 921751 918395 919981920,042.333 F-Factor, dscfm/MMBtu @ %O2 9723 9778 97669,755.667 Moisture, % 6.15 6.43 5.73 6.103 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01420C/119301420C/119 301420C/1193
Operating Range 22.4 22.4 22.4 22.400 Operating Units % % % No. Readings/Avg. 360 360 360 360.000 Calibration Set 9 9 10 9.333 Calibration Pre Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Pre Zero Cylinder Instrument Response -0.05 0.03 0.04 0.007 Calibration Pre Zero Cylinder Bias -0.31 0.04 0.04 -0.077 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0004046EB0004046 EB0004046 Calibration Pre High Cylinder Instrument Response 10.04 10.1 10.06 10.067 Calibration Pre High Cylinder Bias 0 0.27 0.04 0.103 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Post Zero Cylinder Instrument Response 0.03 0.09 0.06 0.060 Calibration Post Zero Cylinder Bias 0.04 0.31 0.13 0.160 Calibration Post Zero Cylinder Drift 0.35 0.27 0.09 0.237 Calibration Post High Cylinder ID EB0004046EB0004046 EB0004046 Calibration Post High Cylinder Instrument Response 10.1 10.13 10.08 10.103 Calibration Post High Cylinder Bias 0.27 0.4 0.13 0.267 Calibration Post High Cylinder Drift 0.27 0.13 0.09 0.163 Cavg 8.71 8.73 8.68 8.707 Cavg Units %vd %vd %vd Cgas 8.6594 8.6312 8.6214 8.637 Cgas Units %vd %vd %vd 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 31 of 33

### RRI Energy, Shawville Station

Location CS3&4 - Method 3A O2 3 6 Average Run Number 7 8 9 Test Date 6/8/2010 6/8/2010 6/8/2010 Run Start Time 9:00:00 AM12:15:00 PM 2:45:00 PM Run Finish Time 11:12:00 AM2:21:00 PM 4:54:00 PM Carbon Dioxide, % 11.4 11.3 11.2 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Fuel Factor 1.07 1.09 1.1 Dry Volumetric Flow Rate, dry scfm 951405 948263 948582949,416.667 F-Factor, dscfm/MMBtu @ %O2 9736 9786 9779 9,767.000 Moisture, % 5.4 4.98 5.09 5.157 Analyzer Make Servomex Servomex Servomex Analyzer Model 1440 1440 1440 1,440.000 Analyzer Serial Number 01420C/119301420C/119 301420C/1193
Operating Range 22.4 22.4 22.4 22.400 Operating Units % % % No. Readings/Avg. 120 120 120 120.000 Calibration Set 11 11 11 11.000 Calibration Pre Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Pre Zero Cylinder Instrument Response 0.05 0.08 0.1 0.077 Calibration Pre Zero Cylinder Bias -0.09 0.04 0.13 0.027 Calibration Pre Zero Cylinder Drift 0 0 0 0.000 Calibration Pre High Cylinder ID EB0015289EB0015289 EB0015289 Calibration Pre High Cylinder Instrument Response 10.98 11.01 11.04 11.010 Calibration Pre High Cylinder Bias 0.09 0.22 0.36 0.223 Calibration Pre High Cylinder Drift 0 0 0 0.000 Calibration Post Zero Cylinder ID EB002054 EB002054 EB002054 Calibration Post Zero Cylinder Instrument Response 0.08 0.1 0.13 0.103 Calibration Post Zero Cylinder Bias 0.04 0.13 0.27 0.147 Calibration Post Zero Cylinder Drift 0.13 0.09 0.14 0.120 Calibration Post High Cylinder ID EB0015289EB0015289 EB0015289 Calibration Post High Cylinder Instrument Response 11.01 11.04 11.06 11.037 Calibration Post High Cylinder Bias 0.22 0.36 0.45 0.343 Calibration Post High Cylinder Drift 0.13 0.14 0.09 0.120 Cavg 8.76 8.75 8.75 8.753 Cavg Units %vd %vd %vd Cgas 8.6711 8.6323 8.6074 8.637 Cgas Units %vd %vd %vd 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 32 of 33

### RRI Energy, Shawville Station

Location CS3&4 - OTM - 27/28 Average Run Number 1 2 3 Test Date 6/3/2010 6/3/2010 6/4/2010 Run Start Time 6:15:00 AM12:45:00 PM 7:55:00 AM Run Finish Time 11:51:00 AM6:25:00 PM 1:32:00 PM Net Traversing Points 12 12 12 Net Run Time, minutes 329 329 329 Nozzle Diameter, inches 0.14 0.14 0.14 0.140 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.994 0.994 0.994 0.994 Barometric Pressure, inches of Mercury 28.2 28.2 28.2 28.200 Average Orifice Meter Differential, inches H2O 0.42 0.42 0.42 0.420 Dry Gas Meter Volume Sampled, cubic feet 128.699 128.115 126.701 127.838 Average Dry Gas Meter Temperature, °F 89.00 93.58 87.08 89.887 Dry Gas Meter Volume Sampled, dscf 116.088 114.605 114.687 115.127 Total Moisture Liquid collected, g 161.5 167 148 158.833 Volume of Water Vapor, standard cubic feet 7.60 7.86 6.97 7.477 Moisture Content of Stack Gas, % 6.14 6.42 5.73 6.097 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.9386 0.9358 0.9427 0.939 Carbon Dioxide, % 11.4 11.2 11.3 11.300 Oxygen, % 8.7 8.6 8.6 8.633 Carbon Monoxide & Nitrogen, % 79.9 80.2 80.1 80.067 Fuel Factor 1.07 1.10 1.09 Dry Molecular Weight, lb/lb-Mole 30.17 30.14 30.15 30.153 Wet Molecular weight, lb/lb-Mole 29.42 29.36 29.45 29.410 Flue Gas Static Pressure, inches of H2O -0.8 -0.8 -0.8 -0.800 Absolute Flue Gas Pressure, inches of Mercury 28.14 28.14 28.14 28.140 Average Stack Gas Temperature, °F 265.92 273.33 267.92 269.057 Average Velocity Head, inches of H2O 1.3887467420 61961.388746742

061961.388746742

06196 1.389
Average Stack Gas Velocity, feet/second 79.24 79.73 79.31 79.427 Stack Cross-Sectional Area, square feet 283.529 283.529 283.529 283.529 Dry Volumetric Flow Rate, dry scfm 865,528.6 859,509.2 867,686.8864,241.533 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,348,010.3 1,356,346.0 1,349,201.11,351,185.8 00 Percent Isokinetic of Sampling Rate, % 108.1 107.5 106.6 107.400 Percent Excess Air, % 70.2 68.4 68.5 69.033 F-Factor, dscfm/MMBtu @ %O2 9723 9778 97669,755.667 Round Duct Diameter, inches 228 228 228 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10596 10668 1067810,647.333 Fc 1802 1809 1800 1,803.667



### Monday, February 14, 2011 Page 33 of 33