Name: Alan Madewell, P.E.

Title: Manager, Environmental, Energy Supp Company: Progress Energy Carolinas, Inc. Sign Date: 9/3/2010 Name: Carl F. Fink Title: Project Manager Company:TRC Environmental Corporation Sign Date: 9/3/2010 Permitted Facility Representative / Date Testing Company Representative / Date 

### Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 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.

Thursday, February 17, 2011 Page 1 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 Facility Information: HB Robinson / Darlington Electric Power Pl 3512 Lakeside Drive

Hartsville SC29550 Contact:Stephen Boone Phone:919-546-4798 Fax: 919-546-6302 Email: Stephen.Boone@pgnmail.com Testing Company: TRC Companies, Inc. 5540 Centerview Drive Suite 100 Raleigh NC27606 Contact:Carl F. Fink Phone:919-604-7790 Fax: 919-828-1977 Email:cfink@trcsolutions.com

Air Permit Number: 3251 Permitted Source ID/Name: 1 Permitted Maximum Process Rate: N/A Max. Normal Operation Process Rate: N/A Target Process Test Rate N/A

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: Unit 1 is a 2400 MMBtu/hr dry bottom, tangentially fired, pulverized coal boiler w/ overfire air and ESP. Industry/SCC/NAIS221112

Sampling Location Information:

Test Parameter Information: AFS #: FRS #:110041028429

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 Stack Exit 180 1020 720 4 0 5 0 0

Target Parameter Test Method Number of

Test Runs Test Run

Duration Sample

Points Comments Location Total PM2.5 OTM - 27/28 3 360 0 Stack Exit Filterable Particulate OTM - 27/28 3 360 0 Stack Exit Organic Condensible

Particulate OTM - 27/28 3 360 0 Stack Exit Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 360 0 Stack Exit Total Particulate OTM - 27/28 3 360 0 Stack Exit Filterable PM2.5 OTM - 27/28 3 360 0 Stack Exit Thursday, February 17, 2011 Page 2 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010

The following describes any modifications and/or deviations to the applicable test methods. If alternative methods were requested, see the attachments for documentation of request AND approval, including dates.

Cobalt Method 29 3 240 0 Stack Exit Arsenic Method 29 3 240 0 Stack Exit Beryllium Method 29 3 240 0 Stack Exit Cadmium Method 29 3 240 0 Stack Exit Chromium Method 29 3 240 0 Stack Exit Lead Method 29 3 240 0 Stack Exit Manganese Method 29 3 240 0 Stack Exit Antimony Method 29 3 240 0 Stack Exit Selenium Method 29 3 240 0 Stack Exit Filterable Particulate Method 29 3 240 0 Stack Exit Nickel Method 29 3 240 0 Stack Exit

Thursday, February 17, 2011 Page 3 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 Sampling / Stack Data Results Summary LocationStack Exit - Method 29 Average Run Number 1 2 3 Test Date 3/30/2010 3/31/2010 4/1/2010 Run Start Time Run Finish Time Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 172.770 183.052 177.647 177.823 Moisture Content of Stack Gas, % 7.35 7.10 7.35 7.267 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 13.44 13.24 13.32 13.333 Oxygen, % 5.64 5.85 5.74 5.743 Average Stack Gas Temperature, °F 261.00 261.93 264.00 262.310 Dry Volumetric Flow Rate, dry scfm 386,173.7 390,908.3 383,469.8386,850.600 Actual Wet Volumetric Flue Gas Flow Rate, acfm 580,614.8 582,735.4 573,086.7578,812.300 Percent Isokinetic of Sampling Rate, % 93.6 98.0 96.9 96.167 F-Factor, dscfm/MMBtu @ %O2 9780 9780 9780 9,780.000 Fw 10640 10640 10640 10,640.000 Fc 1800 1800 1800 1,800.000

LocationStack Exit - OTM - 27/28 Average Run Number Test Date Run Start Time Run Finish Time Net Run Time, minutes Dry Gas Meter Volume Sampled, dscf Moisture Content of Stack Gas, % Moisture Saturation at Stack Gas Temperature, % Carbon Dioxide, % Oxygen, % Average Stack Gas Temperature, °F Dry Volumetric Flow Rate, dry scfm Actual Wet Volumetric Flue Gas Flow Rate, acfm Percent Isokinetic of Sampling Rate, % F-Factor, dscfm/MMBtu @ %O2 Fw Fc
Thursday, February 17, 2011 Page 4 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010

Thursday, February 17, 2011 Page 5 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 Emissions Summary Location: Stack Exit - Method 29 Compound: Antimony Average RunNumber 1 2 3 Mass_mg 0.00627 0.00592 0.00655 0.006 lb/mmBtuO2 1.07E-06 9.68E-07 1.10E-06 0.000 Compound: Arsenic Average RunNumber 1 2 3 Mass_mg 0.0633 0.0371 0.0346 0.045 lb/mmBtuO2 1.08E-05 6.07E-06 5.79E-06 0.000 Compound: Beryllium Average RunNumber 1 2 3 Mass_mg 0.003812 0.003412 0.003912 0.004 lb/mmBtuO2 6.52E-07 5.58E-07 6.55E-07 0.000 Compound: Cadmium Average RunNumber 1 2 3 Mass_mg 0.00179 0.00138 0.00168 0.002 lb/mmBtuO2 3.06E-07 2.26E-07 2.81E-07 0.000 Compound: Chromium Average RunNumber 1 2 3 Mass_mg 0.0416 0.0299 0.0454 0.039 lb/mmBtuO2 7.11E-06 4.89E-06 7.60E-06 0.000 Compound: Cobalt Average RunNumber 1 2 3 Mass_mg 0.0187 0.013949 0.015294 0.016 lb/mmBtuO2 3.20E-06 2.28E-06 2.56E-06 0.000 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 250.6 246.8 236.1 244.500 lb/mmBtuO2 4.28E-02 4.04E-02 3.95E-02 0.041 Compound: Lead Average RunNumber 1 2 3 Mass_mg 0.02788 0.02404 0.02589 0.026 lb/mmBtuO2 4.77E-06 3.93E-06 4.33E-06 0.000 Compound: Manganese Average Thursday, February 17, 2011 Page 6 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010

Process Run Data RunNumber 1 2 3 Mass_mg 0.0365 0.02482 0.0261 0.029 lb/mmBtuO2 6.24E-06 4.06E-06 4.37E-06 0.000 Compound: Nickel Average RunNumber 1 2 3 Mass_mg 0.0452 0.0353 0.0936 0.058 lb/mmBtuO2 7.73E-06 5.77E-06 1.57E-05 0.000 Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.7618 0.5739 0.5322 0.623 lb/mmBtuO2 1.30E-04 9.39E-05 8.91E-05 0.000 Location: Stack Exit - OTM - 27/28 Compound: Filterable Particulate Average RunNumber 1 2 3 Mass_mg 220.9 208.4 177.7 202.333 lb/mmBtuO2 4.55E-02 4.66E-02 3.97E-02 0.044 Compound: Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 85.1 74.1 62.1 73.767 lb/mmBtuO2 1.75E-02 1.66E-02 1.39E-02 0.016 Compound: Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 238.6 429.6 332.4 333.533 lb/mmBtuO2 4.91E-02 9.61E-02 7.43E-02 0.073 Compound: Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 3.3 2.8 3.4 3.167 lb/mmBtuO2 6.80E-04 6.26E-04 7.60E-04 0.001 Compound: Total Particulate Average RunNumber 1 2 3 Mass_mg 460.8 638.8 511.5 537.033 lb/mmBtuO2 9.49E-02 1.43E-01 1.14E-01 0.117 Compound: Total PM2.5 Average RunNumber 1 2 3 Mass_mg 325 504.5 395.9 408.467 lb/mmBtuO2 6.69E-02 1.13E-01 8.85E-02 0.089
Thursday, February 17, 2011 Page 7 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 Process Run Data

Run Name Value UOM Comments Target Value 1 Heat Input 1749.3Million Btus/hr Collected during run 1 of M29 0
2 Heat Input 1745.9Million Btus/hr Collected duringrun 1 of OTM27/28 0

3 Heat Input 1738.6Million Btus/hr Collected during run 2 of M29 0
4 Heat Input 1742.3Million Btus/hr Collected duringrun 2 of OTM27/28 0

5 Heat Input 1722.7Million Btus/hr Collected during run 3 of M29 0
6 Heat Input 1724.1Million Btus/hr Collected duringrun 3 of OTM27/28 0

1 Gov Valve % 85.29 % Collected during run 1 of M29 0
2 Gov Valve % 85.24 % Collected duringrun 1 of OTM27/28 0

3 Gov Valve % 87.23 % Collected during run 2 of M29 0
4 Gov Valve % 87.14 % Collected duringrun 2 of OTM27/28 0

5 Gov Valve % 86.52 % Collected during run 3 of M29 0
6 Gov Valve % 86.34 % Collected duringrun 3 of OTM27/28 0

1 Stack CO2 12.49 % Collected during run 1 of M29 0
2 Stack CO2 12.53 % Collected duringrun 1 of OTM27/28 0

3 Stack CO2 12.36 % Collected during run 2 of M29 0
4 Stack CO2 12.39 % Collected duringrun 2 of OTM27/28 0

5 Stack CO2 12.39 % Collected during run 3 of M29 0

Thursday, February 17, 2011 Page 8 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 6 Stack CO2 12.42 % Collected duringrun 3 of OTM27/28 0

1 Stack Temp 253 Deg F Collected during run 1 of M29 0
2 Stack Temp 255.2 Deg F Collected duringrun 1 of OTM27/28 0

3 Stack Temp 256.2 Deg F Collected during run 2 of M29 0
4 Stack Temp 258.6 Deg F Collected duringrun 2 of OTM27/28 0

5 Stack Temp 259.4 Deg F Collected during run 3 of M29 0
6 Stack Temp 262.3 Deg F Collected duringrun 3 of OTM27/28 0

1 Net Load 178.28 MW Collected during run 1 of M29 0
2 Net Load 178.43 MW Collected duringrun 1 of OTM27/28 0

3 Net Load 178.78 MW Collected during run 2 of M29 0
4 Net Load 178.81 MW Collected duringrun 2 of OTM27/28 0

5 Net Load 177.92 MW Collected during run 3 of M29 0
6 Net Load 177.84 MW Collected duringrun 3 of OTM27/28 0

1 Gross Load 187.82 MW Collected during run 1 of M29 0
2 Gross Load 187.89 MW Collected duringrun 1 of OTM27/28 0

3 Gross Load 188.2 MW Collected during run 2 of M29 0
4 Gross Load 188.2 MW Collected duringrun 2 of OTM27/28 0

5 Gross Load 187.22 MW Collected during run 3 of M29 0
6 Gross Load 187.05 MW Collected duringrun 3 of OTM27/28 0

Thursday, February 17, 2011 Page 9 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 1 Stack Gas Flow 552.26 kacfm Collected during run 1 of M29 0
2 Stack Gas Flow 550.42 kacfm Collected duringrun 1 of OTM27/28 0

3 Stack Gas Flow 560 kacfm Collected during run 2 of M29 0
4 Stack Gas Flow 560.45 kacfm Collected duringrun 2 of OTM27/28 0

5 Stack Gas Flow 552.36 kacfm Collected during run 3 of M29 0
6 Stack Gas Flow 553 kacfm Collected duringrun 3 of OTM27/28 0

1 Coal Burned 1.37 tons/hr Collected during run 1 of M29 0
2 Coal Burned 1.38 tons/hr Collected duringrun 1 of OTM27/28 0

3 Coal Burned 1.32 tons/hr Collected during run 2 of M29 0
4 Coal Burned 1.34 tons/hr Collected duringrun 2 of OTM27/28 0

5 Coal Burned 1.18 tons/hr Collected during run 3 of M29 0
6 Coal Burned 1.21 tons/hr Collected duringrun 3 of OTM27/28 0

1 Coal Burned 2749.3 lbs/hr Collected during run 1 of M29 0
2 Coal Burned 2755 lbs/hr Collected duringrun 1 of OTM27/28 0

3 Coal Burned 2631.1 lbs/hr Collected during run 2 of M29 0
4 Coal Burned 2683.2 lbs/hr Collected duringrun 2 of OTM27/28 0

5 Coal Burned 2361.5 lbs/hr Collected during run 3 of M29 0
6 Coal Burned 2423.8 lbs/hr Collected duringrun 3 of OTM27/28 0

1 "A" Precip Outlet Gas Temp 257 Deg F Collected during run 1 of M29 0

Thursday, February 17, 2011 Page 10 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 2 "A" Precip Outlet Gas Temp 258.8 Deg F Collected duringrun 1 of OTM27/28 0

3 "A" Precip Outlet Gas Temp 259 Deg F Collected during run 2 of M29 0
4 "A" Precip Outlet Gas Temp 260 Deg F Collected duringrun 2 of OTM27/28 0

5 "A" Precip Outlet Gas Temp 261.6 Deg F Collected during run 3 of M29 0
6 "A" Precip Outlet Gas Temp 264.2 Deg F Collected duringrun 3 of OTM27/28 0

1 SO2 1.69351000 lbs/hr Collected during run 1 of M29 0
2 SO2 1.65441000 lbs/hr Collected duringrun 1 of OTM27/28 0

3 SO2 1.49481000 lbs/hr Collected during run 2 of M29 0
4 SO2 1.49271000 lbs/hr Collected duringrun 2 of OTM27/28 0

5 SO2 1.49341000 lbs/hr Collected during run 3 of M29 0
6 SO2 1.49281000 lbs/hr Collected duringrun 3 of OTM27/28 0

1 Oil Return 0.0623 gpm Collected during run 1 of M29 0
2 Oil Return 0.0623 gpm Collected duringrun 1 of OTM27/28 0

3 Oil Return 0.0623 gpm Collected during run 2 of M29 0
4 Oil Return 0.0623 gpm Collected duringrun 2 of OTM27/28 0

5 Oil Return 0.0623 gpm Collected during run 3 of M29 0
6 Oil Return 0.0623 gpm Collected duringrun 3 of OTM27/28 0

1 Oil Supply 0.2029 gpm Collected during run 1 of M29 0
2 Oil Supply 0.2029 gpm Collected duringrun 1 of OTM27/28 0

Thursday, February 17, 2011 Page 11 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 3 Oil Supply 0.2029 gpm Collected during run 2 of M29 0
4 Oil Supply 0.2029 gpm Collected duringrun 2 of OTM27/28 0

5 Oil Supply 0.2041 gpm Collected during run 3 of M29 0
6 Oil Supply 0.2043 gpm Collected duringrun 3 of OTM27/28 0

1 Barometric Pressure 29.82 in Hg Collected during run 1 of M29 0
2 Barometric Pressure 29.81 in Hg Collected duringrun 1 of OTM27/28 0

3 Barometric Pressure 29.98 in Hg Collected during run 2 of M29 0
4 Barometric Pressure 29.98 in Hg Collected duringrun 2 of OTM27/28 0

5 Barometric Pressure 30.07 in Hg Collected during run 3 of M29 0
6 Barometric Pressure 30.07 in Hg Collected duringrun 3 of OTM27/28 0

1 Air Temp 61.6 Deg F Collected during run 1 of M29 0
2 Air Temp 66.3 Deg F Collected duringrun 1 of OTM27/28 0

3 Air Temp 57.5 Deg F Collected during run 2 of M29 0
4 Air Temp 65 Deg F Collected duringrun 2 of OTM27/28 0

5 Air Temp 64.3 Deg F Collected during run 3 of M29 0
6 Air Temp 73.6 Deg F Collected duringrun 3 of OTM27/28 0

1 "B" Econ O2 2.4 % Collected during run 1 of M29 0
2 "B" Econ O2 2.46 % Collected duringrun 1 of OTM27/28 0

3 "B" Econ O2 2.71 % Collected during run 2 of M29 0

Thursday, February 17, 2011 Page 12 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 4 "B" Econ O2 2.71 % Collected duringrun 2 of OTM27/28 0

5 "B" Econ O2 2.62 % Collected during run 3 of M29 0
6 "B" Econ O2 2.64 % Collected duringrun 3 of OTM27/28 0

1 "A" Econ O2 3.77 % Collected during run 1 of M29 0
2 "A" Econ O2 3.76 % Collected duringrun 1 of OTM27/28 0

3 "A" Econ O2 3.81 % Collected during run 2 of M29 0
4 "A" Econ O2 3.78 % Collected duringrun 2 of OTM27/28 0

5 "A" Econ O2 3.64 % Collected during run 3 of M29 0
6 "A" Econ O2 3.64 % Collected duringrun 3 of OTM27/28 0

1 "B" Precip Outlet Gas Temp 242.7 Deg F Collected during run 1 of M29 0
2 "B" Precip Outlet Gas Temp 243.7 Deg F Collected duringrun 1 of OTM27/28 0

3 "B" Precip Outlet Gas Temp 244.9 Deg F Collected during run 2 of M29 0
4 "B" Precip Outlet Gas Temp 246.5 Deg F Collected duringrun 2 of OTM27/28 0

5 "B" Precip Outlet Gas Temp 246.6 Deg F Collected during run 3 of M29 0
6 "B" Precip Outlet Gas Temp 248.4 Deg F Collected duringrun 3 of OTM27/28 0

1 Steam Flow 1371.7 KPPH Collected during run 1 of M29 0
2 Steam Flow 1371.9 KPPH Collected duringrun 1 of OTM27/28 0

3 Steam Flow 1380.7 KPPH Collected during run 2 of M29 0
4 Steam Flow 1380.7 KPPH Collected duringrun 2 of OTM27/28 0

Thursday, February 17, 2011 Page 13 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 5 Steam Flow 1362.5 KPPH Collected during run 3 of M29 0
6 Steam Flow 1362.6 KPPH Collected duringrun 3 of OTM27/28 0

1 NOx 0.3359 lb/MMBtu Collected during run 1 of M29 0
2 NOx 0.3422 lb/MMBtu Collected duringrun 1 of OTM27/28 0

3 NOx 0.3321 lb/MMBtu Collected during run 2 of M29 0
4 NOx 0.3304 lb/MMBtu Collected duringrun 2 of OTM27/28 0

5 NOx 0.3563 lb/MMBtu Collected during run 3 of M29 0
6 NOx 0.3549 lb/MMBtu Collected duringrun 3 of OTM27/28 0

1 CEMS SO2 684.98 ppm Collected during run 1 of M29 0
2 CEMS SO2 670.31 ppm Collected duringrun 1 of OTM27/28 0

3 CEMS SO2 603.88 ppm Collected during run 2 of M29 0
4 CEMS SO2 608.13 ppm Collected duringrun 2 of OTM27/28 0

5 CEMS SO2 608.18 ppm Collected during run 3 of M29 0
6 CEMS SO2 608.27 ppm Collected duringrun 3 of OTM27/28 0

1 CEMS NOx 207.6 ppm Collected during run 1 of M29 0
2 CEMS NOx 206.27 ppm Collected duringrun 1 of OTM27/28 0

3 CEMS NOx 187.43 ppm Collected during run 2 of M29 0
4 CEMS NOx 187 ppm Collected duringrun 2 of OTM27/28 0

5 CEMS NOx 202.78 ppm Collected during run 3 of M29 0

Thursday, February 17, 2011 Page 14 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010

APCD Run Data

Process Lab Run Data 6 CEMS NOx 203.18 ppm Collected duringrun 3 of OTM27/28 0

1 CEMS Stack Flow 415.68 KSCFM Collected during run 1 of M29 0
2 CEMS Stack Flow 414.11 KSCFM Collected duringrun 1 of OTM27/28 0

3 CEMS Stack Flow 411.98 KSCFM Collected during run 2 of M29 0
4 CEMS Stack Flow 415.1 KSCFM Collected duringrun 2 of OTM27/28 0

5 CEMS Stack Flow 408.48 KSCFM Collected during run 3 of M29 0
6 CEMS Stack Flow 411.33 KSCFM Collected duringrun 3 of OTM27/28 0

1 CEMS CO2 12.625 % Collected during run 1 of M29 0
2 CEMS CO2 12.657 % Collected duringrun 1 of OTM27/28 0

3 CEMS CO2 12.425 % Collected during run 2 of M29 0
4 CEMS CO2 12.433 % Collected duringrun 2 of OTM27/28 0

5 CEMS CO2 12.425 % Collected during run 3 of M29 0
6 CEMS CO2 12.417 % Collected duringrun 3 of OTM27/28 0

Run Name Value UOM Comments Target Value 1 OVERFIRE AIR 0 0 1 ELECTROSTATIC PRECIPITATOR 0 0

Thursday, February 17, 2011 Page 15 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 Sampling / Stack Data Results Detail LocationStack Exit - Method 29 Average Run Number 1 2 3 Test Date 3/30/2010 3/31/2010 4/1/2010 Run Start Time Run Finish Time Net Traversing Points 40 40 40 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.254 0.254 0.254 0.254 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0029 1.0029 1.0029 1.003 Barometric Pressure, inches of Mercury 29.39 29.6 29.69 29.560 Average Orifice Meter Differential, inches H2O 1.95 2.12 2.05 2.040 Dry Gas Meter Volume Sampled, cubic feet 177.576 186.171 183.120 182.289 Average Dry Gas Meter Temperature, °F 77.23 75.60 84.40 79.077 Dry Gas Meter Volume Sampled, dscf 172.770 183.052 177.647 177.823 Total Moisture Liquid collected, g 291.2 297.1 299.6 295.967 Volume of Water Vapor, standard cubic feet 13.71 13.98 14.10 13.930 Moisture Content of Stack Gas, % 7.35 7.10 7.35 7.267 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.9265 0.929 0.9265 0.927 Carbon Dioxide, % 13.44 13.24 13.32 13.333 Oxygen, % 5.64 5.85 5.74 5.743 Carbon Monoxide & Nitrogen, % 80.92 80.91 80.94 80.923 Fuel Factor 1.14 1.14 1.14 Dry Molecular Weight, lb/lb-Mole 30.38 30.35 30.36 30.363 Wet Molecular weight, lb/lb-Mole 29.47 29.47 29.45 29.463 Flue Gas Static Pressure, inches of H2O -0.78 -0.77 -0.77 -0.773 Absolute Flue Gas Pressure, inches of Mercury 29.33 29.54 29.63 29.500 Average Stack Gas Temperature, °F 261.00 261.93 264.00 262.310 Average Velocity Head, inches of H2O 0.6970802997 455910.706308307

7037380.682811762

500604 0.695 Average Stack Gas Velocity, feet/second 54.76 54.96 54.05 54.590 Stack Cross-Sectional Area, square feet 176.715 176.715 176.715 176.715 Dry Volumetric Flow Rate, dry scfm 386,173.7 390,908.3 383,469.8386,850.600 Actual Wet Volumetric Flue Gas Flow Rate, acfm 580,614.8 582,735.4 573,086.7578,812.300 Percent Isokinetic of Sampling Rate, % 93.6 98.0 96.9 96.167 Percent Excess Air, % 35.9 37.7 36.7 36.767 F-Factor, dscfm/MMBtu @ %O2 9780 9780 97809,780.000 Round Duct Diameter, inches 180 180 180 Rectangular Duct Width, inches 0 0 0 Rectangular Duct Length, inches 0 0 0 Fw 10640 10640 1064010,640.000 Fc 1800 1800 18001,800.000

Thursday, February 17, 2011 Page 16 of 17Utility Boiler MACT ICR - HB Robinson / Darlington Electric Power Plant Unit 1 9/3/2010 LocationStack Exit - OTM - 27/28 Average Run Number Test Date Run Start Time Run Finish Time Net Traversing Points Net Run Time, minutes Nozzle Diameter, inches Pitot Tube Coefficient Dry Gas Meter Calibration Factor Barometric Pressure, inches of Mercury Average Orifice Meter Differential, inches H2O Dry Gas Meter Volume Sampled, cubic feet Average Dry Gas Meter Temperature, °F Dry Gas Meter Volume Sampled, dscf Total Moisture Liquid collected, g Volume of Water Vapor, standard cubic feet Moisture Content of Stack Gas, % Moisture Saturation at Stack Gas Temperature, % Dry Mole Fraction Carbon Dioxide, % Oxygen, % Carbon Monoxide & Nitrogen, % Fuel Factor Dry Molecular Weight, lb/lb-Mole Wet Molecular weight, lb/lb-Mole Flue Gas Static Pressure, inches of H2O Absolute Flue Gas Pressure, inches of Mercury Average Stack Gas Temperature, °F Average Velocity Head, inches of H2O Average Stack Gas Velocity, feet/second Stack Cross-Sectional Area, square feet Dry Volumetric Flow Rate, dry scfm Actual Wet Volumetric Flue Gas Flow Rate, acfm Percent Isokinetic of Sampling Rate, % Percent Excess Air, % F-Factor, dscfm/MMBtu @ %O2 Round Duct Diameter, inches Rectangular Duct Width, inches Rectangular Duct Length, inches Fw Fc

Thursday, February 17, 2011 Page 17 of 17