Name: Ted Lindenbusch

Title: Plant Manager Company: Dynegy Midwest Generation Sign Date: 9/3/2010 Name: Scott R. Miller Title: Operations Manager Company:TRC Companies, Inc. Sign Date: 9/3/2010 Permitted Facility Representative / Date Testing Company Representative / Date



### Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 Final Test Report for

/ / Based on information and belief formed after reasonable inquiry, I certify that the statements and information in this test report are true, accurate, and complete. I have reviewed all testing details and results in this test report and hereby certify that the test report is authentic and accurate.

Tuesday, February 15, 2011 Page 1 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Facility Information: Hennepin Power Station 13498 E 800th St. Hennepin IL61327 Contact:Rick Diericx Phone:618-206-5927 Fax: 618-206-5891 Email:Aric.diericx@dynegy.com Testing Company: TRC Companies, Inc. 1058 N Dupage Avenue Lombard IL60148 Contact:Scott R. Miller Phone:630-953-9046 Fax: 630-953-9114 Email:smiller@trcsolutions.com
Air Permit Number: 892 Permitted Source ID/Name: 1_2 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 & Unit 2 are Combustion Engineering tangential-fired boilers with burners evenly grouped into the four corners of each boiler. Unit 1 boiler has 12 burners; unit 2 boiler has 32 burners. The boilers have a combined nominal rating of 300 megawatts (MW). Each have a designated ESP, an activated carbon injection system & a baghouse. Industry/SCC/NAIS221112

Sampling Location Information:

Test Parameter Information: AFS #:1715500002 FRS #:110006166139

SCC / Description10100222 External Combustion Boilers - Electric Generation - Bituminous/Subbituminous Coal - Pulverized Coal: Dry Bottom (Subbituminous Coal) The following state and federal regulations that apply to the proposed testing:

Location Round

Duct Diam. Distance from upstream dist. Distance from

downstream dist. Number of

Traverse Ports Equiv. Diam Min.Travers Points Rect. Duct Length /Width Stack Exit 199 1592 398 4 0 3 0 0 Target Parameter Test Method Number of

Test RunsTest Run

DurationSample

Points Comments Location2,3,7,8-TCDD Method 23 3 480 0 Stack Exit 1,2,3,7,8-PeCDD Method 23 3 480 0 Stack Exit 1,2,3,4,7,8-HxCDD Method 23 3 480 0 Stack Exit 1,2,3,6,7,8-HxCDD Method 23 3 480 0 Stack Exit 1,2,3,7,8,9-HxCDD Method 23 3 480 0 Stack Exit 1,2,3,4,6,7,8-HpCDD Method 23 3 480 0 Stack Exit OCDD Method 23 3 480 0 Stack Exit Tuesday, February 15, 2011 Page 2 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 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.

2,3,7,8-TCDF Method 23 3 480 0 Stack Exit 1,2,3,7,8-PeCDF Method 23 3 480 0 Stack Exit 2,3,4,7,8-PeCDF Method 23 3 480 0 Stack Exit 1,2,3,4,7,8-HxCDF Method 23 3 480 0 Stack Exit 1,2,3,6,7,8-HxCDF Method 23 3 480 0 Stack Exit 2,3,4,6,7,8-HxCDF Method 23 3 480 0 Stack Exit 1,2,3,7,8,9-HxCDF Method 23 3 480 0 Stack Exit 1,2,3,4,6,7,8-HpCDF Method 23 3 480 0 Stack Exit 1,2,3,4,7,8,9-HpCDF Method 23 3 480 0 Stack Exit OCDF Method 23 3 480 0 Stack Exit Other TCDD Method 23 0 Stack Exit Other PeCDD Method 23 0 Stack Exit Other HxCDD Method 23 0 Stack Exit Other HpCDD Method 23 0 Stack Exit Other TCDF Method 23 0 Stack Exit Other PeCDF Method 23 0 Stack Exit Other HxCDF Method 23 0 Stack Exit Other HpCDF Method 23 0 Stack Exit Total Dioxins Method 23 3 480 0 Stack Exit Total Furans Method 23 3 480 0 Stack Exit 3,3',4,4'-TCB (PCB77) Method 23 3 480 0 Stack Exit 3,4,4',5-TCB (PCB81) Method 23 3 480 0 Stack Exit 2,3,3',4,4'-PeCB (PCB105) Method 23 3 480 0 Stack Exit 2,3,4,4',5-PeCB (PCB114) Method 23 3 480 0 Stack Exit 2,3',4,4',5-PeCB (PCB118) Method 23 3 480 0 Stack Exit 2',3,4,4',5-PeCB (PCB123) Method 23 3 480 0 Stack Exit 3,3',4,4',5-PeCB (PCB126) Method 23 3 480 0 Stack Exit 2,3,3',4,4',5/2,3,3',4,4',5'-

HxCB (PCBs156/157) Method 23 3 480 0 Stack Exit 2,3',4,4',5,5'-HxCB (PCB167)Method 23 3 480 0 Stack Exit 3,3',4,4',5,5'-HxCB (PCB169)Method 23 3 480 0 Stack Exit 2,3,3',4,4',5,5'-HpCB

(PCB189) Method 23 3 480 0 Stack Exit Filterable PM2.5 OTM - 27/28 3 240 0 Stack Exit Total PM2.5 OTM - 27/28 3 240 0 Stack Exit Inorganic (Aqueous)

Condensible Part. OTM - 27/28 3 240 0 Stack Exit Total Particulate OTM - 27/28 3 240 0 Stack Exit Filterable Particulate OTM - 27/28 3 240 0 Stack Exit Organic Condensible

Particulate OTM - 27/28 3 240 0 Stack Exit Antimony Method 29 3 240 0 Stack Exit Cobalt Method 29 3 240 0 Stack Exit Selenium Method 29 3 240 0 Stack Exit Nickel Method 29 3 240 0 Stack Exit Manganese Method 29 3 240 0 Stack Exit Lead Method 29 3 240 0 Stack Exit Chromium Method 29 3 240 0 Stack Exit Cadmium Method 29 3 240 0 Stack Exit Beryllium Method 29 3 240 0 Stack Exit Arsenic Method 29 3 240 0 Stack Exit Tuesday, February 15, 2011 Page 3 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 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.

Tuesday, February 15, 2011 Page 4 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Sampling / Stack Data Results Summary LocationStack Exit - Method 23 Average Run Number 1 2 3 Test Date 4/13/20104/14/2010 4/15/2010 Run Start Time 8:20:00 AM 8:40:00 AM7:35:00 AM Run Finish Time 4:41:00 PM5:12:00 PM3:54:00 PM Net Run Time, minutes 480 480 480 Dry Gas Meter Volume Sampled, dscf 275.783 270.127 265.420 270.443 Moisture Content of Stack Gas, % 10.85 11.57 10.90 11.107 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Carbon Dioxide, % 12.6 12.8 12.9 12.767 Oxygen, % 6.8 6.6 6.5 6.633 Average Stack Gas Temperature, °F 330.21 331.61 330.80 330.873 Dry Volumetric Flow Rate, dry scfm 637,153.1 619,390.1 614,664.1623,735.767 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,085,220.21,059,690.1 1,048,285.91,064,398.73 3 Percent Isokinetic of Sampling Rate, % 100.0 100.7 99.7 100.133 F-Factor, dscfm/MMBtu @ %O2 9721 9649 9635 9,668.333 Fw 0 0 0 0.000 Fc 0 0 0 0.000

Tuesday, February 15, 2011 Page 5 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 LocationStack Exit - Method 29 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 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
Tuesday, February 15, 2011 Page 6 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Emissions Summary Location: Stack Exit - Method 23 Compound: 1,2,3,4,6,7,8-HpCDD Average RunNumber 1 2 3 Mass_mg 0.00000002797 0.00000003153 0.000000017 0.000 lb/mmBtuO2 3.22E-12 3.63E-12 1.97E-12 0.000 ng/dscm 3.58E-03 4.12E-03 2.26E-03 0.003 ng/dscm@7%O2 3.53E-03 4.00E-03 2.18E-03 0.003 Compound: 1,2,3,4,6,7,8-HpCDF Average RunNumber 1 2 3 Mass_mg 0.00000007265 0.0000000241 0.00000001455 0.000 lb/mmBtuO2 8.37E-12 2.77E-12 1.69E-12 0.000 ng/dscm 9.30E-03 3.15E-03 1.94E-03 0.005 ng/dscm@7%O2 9.17E-03 3.06E-03 1.87E-03 0.005 Compound: 1,2,3,4,7,8,9-HpCDF Average RunNumber 1 2 3 Mass_mg 0.00000002518 0.00000003367 0.00000005059 0.000 lb/mmBtuO2 2.90E-12 3.88E-12 5.88E-12 0.000 ng/dscm 3.22E-03 4.40E-03 6.73E-03 0.005 ng/dscm@7%O2 3.17E-03 4.28E-03 6.50E-03 0.005 Compound: 1,2,3,4,7,8-HxCDD Average RunNumber 1 2 3 Mass_mg 0.00000002402 0.00000003331 0.00000002052 0.000 lb/mmBtuO2 2.77E-12 3.83E-12 2.38E-12 0.000 ng/dscm 3.08E-03 4.36E-03 2.73E-03 0.003 ng/dscm@7%O2 3.04E-03 4.24E-03 2.64E-03 0.003 Compound: 1,2,3,4,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000002078 0.00000002673 0.00000001736 0.000 lb/mmBtuO2 2.39E-12 3.08E-12 2.02E-12 0.000 ng/dscm 2.66E-03 3.50E-03 2.31E-03 0.003 ng/dscm@7%O2 2.62E-03 3.40E-03 2.23E-03 0.003 Compound: 1,2,3,6,7,8-HxCDD Average RunNumber 1 2 3 Mass_mg 0.00000002075 0.00000002877 0.00000001772 0.000 lb/mmBtuO2 2.39E-12 3.31E-12 2.06E-12 0.000 ng/dscm 2.66E-03 3.76E-03 2.36E-03 0.003 ng/dscm@7%O2 2.62E-03 3.65E-03 2.28E-03 0.003 Compound: 1,2,3,6,7,8-HxCDF Average Tuesday, February 15, 2011 Page 7 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 RunNumber 1 2 3 Mass_mg 0.00000001771 0.00000002278 0.0000000148 0.000 lb/mmBtuO2 2.04E-12 2.62E-12 1.72E-12 0.000 ng/dscm 2.27E-03 2.98E-03 1.97E-03 0.002 ng/dscm@7%O2 2.24E-03 2.90E-03 1.90E-03 0.002 Compound: 1,2,3,7,8,9-HxCDD Average RunNumber 1 2 3 Mass_mg 0.00000002379 0.00000003298 0.00000002032 0.000 lb/mmBtuO2 2.74E-12 3.80E-12 2.36E-12 0.000 ng/dscm 3.05E-03 4.31E-03 2.70E-03 0.003 ng/dscm@7%O2 3.01E-03 4.19E-03 2.61E-03 0.003 Compound: 1,2,3,7,8,9-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000002575 0.00000003312 0.00000002151 0.000 lb/mmBtuO2 2.97E-12 3.81E-12 2.50E-12 0.000 ng/dscm 3.30E-03 4.33E-03 2.86E-03 0.003 ng/dscm@7%O2 3.25E-03 4.21E-03 2.76E-03 0.003 Compound: 1,2,3,7,8-PeCDD Average RunNumber 1 2 3 Mass_mg 0.00000002146 0.00000002638 0.00000001657 0.000 lb/mmBtuO2 2.47E-12 3.04E-12 1.92E-12 0.000 ng/dscm 2.75E-03 3.45E-03 2.21E-03 0.003 ng/dscm@7%O2 2.71E-03 3.35E-03 2.13E-03 0.003 Compound: 1,2,3,7,8-PeCDF Average RunNumber 1 2 3 Mass_mg 0.00000006749 0.00000002699 0.00000001806 0.000 lb/mmBtuO2 7.77E-12 3.11E-12 2.10E-12 0.000 ng/dscm 8.64E-03 3.53E-03 2.40E-03 0.005 ng/dscm@7%O2 8.52E-03 3.43E-03 2.32E-03 0.005 Compound:2,3,3',4,4',5,5'-HpCB (PCB189) Average RunNumber 1 2 3 Mass_mg 0.0000000532 0.00000003239 0.00000005618 0.000 lb/mmBtuO2 6.13E-12 3.73E-12 6.53E-12 0.000 ng/dscm 6.81E-03 4.24E-03 7.48E-03 0.006 ng/dscm@7%O2 6.71E-03 4.12E-03 7.22E-03 0.006 Compound:2,3,3',4,4',5/2,3,3',4,4',5'-HxCB (PC Average RunNumber 1 2 3 Mass_mg 0.00000009581 0.00000006508 0.0000000544 0.000 lb/mmBtuO2 1.10E-11 7.49E-12 6.32E-12 0.000 ng/dscm 1.23E-02 8.51E-03 7.24E-03 0.009 ng/dscm@7%O2 1.21E-02 8.27E-03 6.99E-03 0.009 Tuesday, February 15, 2011 Page 8 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Compound:2,3,3',4,4'-PeCB (PCB105) Average RunNumber 1 2 3 Mass_mg 0.00000045835 0.00000031426 0.00000002315 0.000 lb/mmBtuO2 5.28E-11 3.62E-11 2.69E-12 0.000 ng/dscm 5.87E-02 4.11E-02 3.08E-03 0.034 ng/dscm@7%O2 5.79E-02 4.00E-02 2.97E-03 0.034 Compound:2,3',4,4',5,5'-HxCB (PCB167) Average RunNumber 1 2 3 Mass_mg 0.00000003279 0.00000002066 0.00000002854 0.000 lb/mmBtuO2 3.78E-12 2.38E-12 3.32E-12 0.000 ng/dscm 4.20E-03 2.70E-03 3.80E-03 0.004 ng/dscm@7%O2 4.14E-03 2.62E-03 3.67E-03 0.003 Compound:2,3,4,4',5-PeCB (PCB114) Average RunNumber 1 2 3 Mass_mg 0.00000001964 0.000000018 0.00000002538 0.000 lb/mmBtuO2 2.26E-12 2.07E-12 2.95E-12 0.000 ng/dscm 2.52E-03 2.35E-03 3.38E-03 0.003 ng/dscm@7%O2 2.48E-03 2.28E-03 3.26E-03 0.003 Compound:2,3',4,4',5-PeCB (PCB118) Average RunNumber 1 2 3 Mass_mg 0.00000109406 0.00000069034 0.00000069567 0.000 lb/mmBtuO2 1.26E-10 7.95E-11 8.08E-11 0.000 ng/dscm 1.40E-01 9.03E-02 9.26E-02 0.108 ng/dscm@7%O2 1.38E-01 8.78E-02 8.94E-02 0.105 Compound:2',3,4,4',5-PeCB (PCB123) Average RunNumber 1 2 3 Mass_mg 0.00000091848 0.00000060837 0.00000003545 0.000 lb/mmBtuO2 1.06E-10 7.00E-11 4.12E-12 0.000 ng/dscm 1.18E-01 7.95E-02 4.72E-03 0.067 ng/dscm@7%O2 1.16E-01 7.73E-02 4.56E-03 0.066 Compound:2,3,4,6,7,8-HxCDF Average RunNumber 1 2 3 Mass_mg 0.00000002073 0.00000002667 0.00000001732 0.000 lb/mmBtuO2 2.39E-12 3.07E-12 2.01E-12 0.000 ng/dscm 2.65E-03 3.49E-03 2.30E-03 0.003 ng/dscm@7%O2 2.61E-03 3.39E-03 2.22E-03 0.003 Compound:2,3,4,7,8-PeCDF Average RunNumber 1 2 3 Mass_mg 0.00000002122 0.00000002715 0.00000001816 0.000 lb/mmBtuO2 2.44E-12 3.12E-12 2.11E-12 0.000 Tuesday, February 15, 2011 Page 9 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 ng/dscm 2.72E-03 3.55E-03 2.42E-03 0.003 ng/dscm@7%O2 2.68E-03 3.45E-03 2.34E-03 0.003 Compound:2,3,7,8-TCDD Average RunNumber 1 2 3 Mass_mg 0.00000001479 0.00000002165 0.000000013 0.000 lb/mmBtuO2 1.70E-12 2.49E-12 1.51E-12 0.000 ng/dscm 1.89E-03 2.83E-03 1.73E-03 0.002 ng/dscm@7%O2 1.86E-03 2.75E-03 1.67E-03 0.002 Compound:2,3,7,8-TCDF Average RunNumber 1 2 3 Mass_mg 0.00000028542 0.0000001865 0.00000019503 0.000 lb/mmBtuO2 3.29E-11 2.15E-11 2.27E-11 0.000 ng/dscm 3.66E-02 2.44E-02 2.60E-02 0.029 ng/dscm@7%O2 3.61E-02 2.37E-02 2.51E-02 0.028 Compound: 3,3',4,4',5,5'-HxCB (PCB169) Average RunNumber 1 2 3 Mass_mg 0.00000003725 0.00000002569 0.00000003153 0.000 lb/mmBtuO2 4.29E-12 2.96E-12 3.66E-12 0.000 ng/dscm 4.77E-03 3.36E-03 4.20E-03 0.004 ng/dscm@7%O2 4.70E-03 3.27E-03 4.05E-03 0.004 Compound: 3,3',4,4',5-PeCB (PCB126) Average RunNumber 1 2 3 Mass_mg 0.00000002281 0.00000001753 0.00000002617 0.000 lb/mmBtuO2 2.63E-12 2.02E-12 3.04E-12 0.000 ng/dscm 2.92E-03 2.29E-03 3.48E-03 0.003 ng/dscm@7%O2 2.88E-03 2.23E-03 3.36E-03 0.003 Compound: 3,3',4,4'-TCB (PCB77) Average RunNumber 1 2 3 Mass_mg 0.00000005423 0.00000002106 0.00000002366 0.000 lb/mmBtuO2 6.25E-12 2.42E-12 2.75E-12 0.000 ng/dscm 6.95E-03 2.75E-03 3.15E-03 0.004 ng/dscm@7%O2 6.85E-03 2.67E-03 3.04E-03 0.004 Compound: 3,4,4',5-TCB (PCB81) Average RunNumber 1 2 3 Mass_mg 0.00000002299 0.00000014153 0.00000002624 0.000 lb/mmBtuO2 2.65E-12 1.63E-11 3.05E-12 0.000 ng/dscm 2.94E-03 1.85E-02 3.49E-03 0.008 ng/dscm@7%O2 2.90E-03 1.80E-02 3.37E-03 0.008 Compound:OCDD Average RunNumber 1 2 3 Tuesday, February 15, 2011 Page 10 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Mass_mg 0.00000003149 0.00000003112 0.00000001941 0.000 lb/mmBtuO2 3.63E-12 3.58E-12 2.25E-12 0.000 ng/dscm 4.03E-03 4.07E-03 2.58E-03 0.004 ng/dscm@7%O2 3.97E-03 3.96E-03 2.49E-03 0.003 Compound:OCDF Average RunNumber 1 2 3 Mass_mg 0.00000003875 0.00000003232 0.00000002203 0.000 lb/mmBtuO2 4.46E-12 3.72E-12 2.56E-12 0.000 ng/dscm 4.96E-03 4.23E-03 2.93E-03 0.004 ng/dscm@7%O2 4.89E-03 4.11E-03 2.83E-03 0.004 Compound:Other HpCDD Average RunNumber 1 2 3 Mass_mg 0 0 0.0000000628 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 7.29E-12 0.000 ng/dscm 0.00E+00 0.00E+00 8.36E-03 0.003 ng/dscm@7%O2 0.00E+00 0.00E+00 8.07E-03 0.003 Compound:Other HpCDF Average RunNumber 1 2 3 Mass_mg 0 0 0 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm@7%O2 0.00E+00 0.00E+00 0.00E+00 0.000 Compound:Other HxCDD Average RunNumber 1 2 3 Mass_mg 0 0 0 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm@7%O2 0.00E+00 0.00E+00 0.00E+00 0.000 Compound:Other HxCDF Average RunNumber 1 2 3 Mass_mg 0 0 0 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm@7%O2 0.00E+00 0.00E+00 0.00E+00 0.000 Compound:Other PeCDD Average RunNumber 1 2 3 Mass_mg 0 0 0 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm@7%O2 0.00E+00 0.00E+00 0.00E+00 0.000 Tuesday, February 15, 2011 Page 11 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Compound:Other PeCDF Average RunNumber 1 2 3 Mass_mg 0 0 0 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm@7%O2 0.00E+00 0.00E+00 0.00E+00 0.000 Compound:Other TCDD Average RunNumber 1 2 3 Mass_mg 0 0 0 0.000 lb/mmBtuO2 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm 0.00E+00 0.00E+00 0.00E+00 0.000 ng/dscm@7%O2 0.00E+00 0.00E+00 0.00E+00 0.000 Compound:Other TCDF Average RunNumber 1 2 3 Mass_mg 0.00000046686 0 0 0.000 lb/mmBtuO2 5.38E-11 0.00E+00 0.00E+00 0.000 ng/dscm 5.98E-02 0.00E+00 0.00E+00 0.020 ng/dscm@7%O2 5.90E-02 0.00E+00 0.00E+00 0.020 Compound:Total Dioxins Average RunNumber 1 2 3 Mass_mg 0.00000016427 0.00000020574 0.00000018734 0.000 lb/mmBtuO2 1.89E-11 2.37E-11 2.18E-11 0.000 ng/dscm 2.10E-02 2.69E-02 2.49E-02 0.024 ng/dscm@7%O2 2.07E-02 2.61E-02 2.40E-02 0.024 Compound:Total Furans Average RunNumber 1 2 3 Mass_mg 0.00000106254 0.00000044003 0.00000038941 0.000 lb/mmBtuO2 1.22E-10 5.06E-11 4.52E-11 0.000 ng/dscm 1.36E-01 5.75E-02 5.18E-02 0.082 ng/dscm@7%O2 1.34E-01 5.59E-02 5.00E-02 0.080 Location: Stack Exit - Method 29 Compound:Antimony Average RunNumber 1 2 3 Mass_mg 0.00413 0.00157 0.00123 0.002 lb/mmBtuO2 6.75E-07 2.87E-07 2.34E-07 0.000 Compound:Arsenic Average RunNumber 1 2 3 Mass_mg 0.002 0.00435 0.002 0.003 lb/mmBtuO2 3.27E-07 7.94E-07 3.80E-07 0.000 Tuesday, February 15, 2011 Page 12 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Compound:Beryllium Average RunNumber 1 2 3 Mass_mg 0.0004 0.00025 0.00023 0.000 lb/mmBtuO2 6.54E-08 4.57E-08 4.37E-08 0.000 Compound:Cadmium Average RunNumber 1 2 3 Mass_mg 0.00117 0.00071 0.0004 0.001 lb/mmBtuO2 1.91E-07 1.30E-07 7.59E-08 0.000 Compound:Chromium Average RunNumber 1 2 3 Mass_mg 0.00714 0.01667 0.0133 0.012 lb/mmBtuO2 1.17E-06 3.04E-06 2.53E-06 0.000 Compound:Cobalt Average RunNumber 1 2 3 Mass_mg 0.00205 0.00156 0.00082 0.001 lb/mmBtuO2 3.35E-07 2.85E-07 1.56E-07 0.000 Compound:Lead Average RunNumber 1 2 3 Mass_mg 0.01793 0.01713 0.01332 0.016 lb/mmBtuO2 2.93E-06 3.13E-06 2.53E-06 0.000 Compound:Manganese Average RunNumber 1 2 3 Mass_mg 0.01273 0.00816 0.00806 0.010 lb/mmBtuO2 2.08E-06 1.49E-06 1.53E-06 0.000 Compound:Nickel Average RunNumber 1 2 3 Mass_mg 0.01327 0.00976 0.01295 0.012 lb/mmBtuO2 2.17E-06 1.78E-06 2.46E-06 0.000 Compound: Selenium Average RunNumber 1 2 3 Mass_mg 0.01216 0.01124 0.00232 0.009 lb/mmBtuO2 1.99E-06 2.05E-06 4.40E-07 0.000 Location: Stack Exit - OTM - 27/28 Compound:Filterable Particulate Average RunNumber 1 2 3 Mass_mg 26.2 26.8 18.1 23.700 Tuesday, February 15, 2011 Page 13 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010

Process Run Data lb/mmBtuO2 6.30E-03 6.61E-03 4.50E-03 0.006 Compound:Filterable PM2.5 Average RunNumber 1 2 3 Mass_mg 8.5 4.2 5.2 5.967 lb/mmBtuO2 2.04E-03 1.04E-03 1.29E-03 0.001 Compound:Inorganic (Aqueous) Condensible Pa Average RunNumber 1 2 3 Mass_mg 20.8 16.6 14.6 17.333 lb/mmBtuO2 5.00E-03 4.10E-03 3.63E-03 0.004 Compound:Organic Condensible Particulate Average RunNumber 1 2 3 Mass_mg 3.1 3 5.7 3.933 lb/mmBtuO2 7.45E-04 7.40E-04 1.42E-03 0.001 Compound:Total Particulate Average RunNumber 1 2 3 Mass_mg 50.1 46.4 38.4 44.967 lb/mmBtuO2 1.20E-02 1.15E-02 9.55E-03 0.011 Compound:Total PM2.5 Average RunNumber 1 2 3 Mass_mg 32.4 23.8 25.5 27.233 lb/mmBtuO2 7.79E-03 5.87E-03 6.34E-03 0.007

Tuesday, February 15, 2011 Page 14 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Process Run Data Run Name Value UOM Comments Target Value 1 Unit 1 & 2 Avg. Combined Heat Input 2531Million Btus/hr Collected during M23 run 1 0 2Unit 1 & 2 Avg. Combined Heat Input 2505Million Btus/hr Collected during M23 run 2 0 3 Unit 1 & 2 Avg. Combined Heat Input 2597Million Btus/hr Collected during M23 run 3 0 4Unit 1 & 2 Avg. Combined Heat Input 3422.6Million Btus/hr Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 & 2 Avg. Combined Heat Input 3362.1Million Btus/hr Collected during run 2 of M29 and OTM27/28 0
6Unit 1 & 2 Avg. Combined Heat Input 3347.2Million Btus/hr Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 Coal Firing Rate 92.56 1000 lb/hr Collected during M23 run 1 0 2Unit 1 Coal Firing Rate 91.35 1000 lb/hr Collected during M23 run 2 0 3 Unit 1 Coal Firing Rate 91.5 1000 lb/hr Collected during M23 run 3 0 4Unit 1 Coal Firing Rate 245.541000 lb/hr Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 Coal Firing Rate 244.821000 lb/hr Collected during run 2 of M29 and OTM27/28 0
6Unit 1 Coal Firing Rate 240.73 1000 lb/hr Collected during run 3 of M29 and OTM27/28 0
1 Unit 2 Air Flow 1651.1 1000 lb/hr Collected during M23 run 1 0 2Unit 2 Air Flow 1631.5 1000 lb/hr Collected during M23 run 2 0 3 Unit 2 Air Flow 1697.5 1000 lb/hr Collected during M23 run 3 0 4Unit 2 Air Flow 0 1000 lb/hr NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Air Flow 0 1000 lb/hr NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 15 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6Unit 2 Air Flow 0 1000 lb/hr NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Air Flow 453.99 1000 lb/hr Collected during M23 run 1 0 2Unit 1 Air Flow 446.13 1000 lb/hr Collected during M23 run 2 0 3 Unit 1 Air Flow 446.15 1000 lb/hr Collected during M23 run 3 0 4Unit 1 Air Flow 0 1000 lb/hr NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Air Flow 0 1000 lb/hr NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Air Flow 0 1000 lb/hr NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Steam Flow 1162.11000 lb steam/hr Collected during M23 run 1 0 2Unit 2 Steam Flow 11411000 lb steam/hr Collected during M23 run 2 0 3 Unit 2 Steam Flow 1165.91000 lb steam/hr Collected during M23 run 3 0 4Unit 2 Steam Flow 1528.41000 lb steam/hr Collected during run 1 of M29 and OTM27/28 0
5 Unit 2 Steam Flow 1519.91000 lb steam/hr Collected during run 2 of M29 and OTM27/28 0
6Unit 2 Steam Flow 1524.31000 lb steam/hr Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 Steam Flow 421.331000 lb steam/hr Collected during M23 run 1 0 2Unit 1 Steam Flow 418.971000 lb steam/hr Collected during M23 run 2 0 3 Unit 1 Steam Flow 415.641000 lb steam/hr Collected during M23 run 3 0 4Unit 1 Steam Flow 558.41000 lb steam/hr Collected during run 1 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 16 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 Unit 1 Steam Flow 564.91000 lb steam/hr Collected during run 2 of M29 and OTM27/28 0
6Unit 1 Steam Flow 559.81000 lb steam/hr Collected during run 3 of M29 and OTM27/28 0
1 Unit 2 Gross Generation 186.54 MW Collected during M23 run 1 0 2Unit 2 Gross Generation 184.86 MW Collected during M23 run 2 0 3 Unit 2 Gross Generation 186.09 MW Collected during M23 run 3 0 4Unit 2 Gross Generation 229.9 MW Collected during run 1 of M29 and OTM27/28 0
5 Unit 2 Gross Generation 230.2 MW Collected during run 2 of M29 and OTM27/28 0
6Unit 2 Gross Generation 230.6 MW Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 Gross Generation 56.35 MW Collected during M23 run 1 0 2Unit 1 Gross Generation 55.9 MW Collected during M23 run 2 0 3 Unit 1 Gross Generation 55.36 MW Collected during M23 run 3 0 4Unit 1 Gross Generation 74 MW Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 Gross Generation 74.6 MW Collected during run 2 of M29 and OTM27/28 0
6Unit 1 Gross Generation 74.6 MW Collected during run 3 of M29 and OTM27/28 0
1 Unit 2 Net Generation 172.62 MW Collected during M23 run 1 0 2Unit 2 Net Generation 170.28 MW Collected during M23 run 2 0 3 Unit 2 Net Generation 171.33 MW Collected during M23 run 3 0 4Unit 2 Net Generation 214 MW Collected during run 1 of M29 and OTM27/28 0
5 Unit 2 Net Generation 214.2 MW Collected during run 2 of M29 and OTM27/28 0
Tuesday, February 15, 2011 Page 17 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6Unit 2 Net Generation 214.1 MW Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 Net Generation 51.35 MW Collected during M23 run 1 0 2Unit 1 Net Generation 50.9 MW Collected during M23 run 2 0 3 Unit 1 Net Generation 50.35 MW Collected during M23 run 3 0 4Unit 1 Net Generation 68.2 MW Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 Net Generation 68.6 MW Collected during run 2 of M29 and OTM27/28 0
6Unit 1 Net Generation 68.8 MW Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 Natural Gas Firing Rate 0 scfm Collected during M23 run 1 0 2Unit 1 Natural Gas Firing Rate 0 scfm Collected during M23 run 2 0 3 Unit 1 Natural Gas Firing Rate 0 scfm Collected during M23 run 3 0 4Unit 1 Natural Gas Firing Rate 0 scfm NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Natural Gas Firing Rate 0 scfm NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Natural Gas Firing Rate 0 scfm NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Natural Gas Firing Rate 0 scfm Collected during M23 run 1 0 2Unit 2 Natural Gas Firing Rate 0 scfm Collected during M23 run 2 0 3 Unit 2 Natural Gas Firing Rate 0 scfm Collected during M23 run 3 0 4Unit 2 Natural Gas Firing Rate 0 scfm NOT collected during run 1 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 18 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 Unit 2 Natural Gas Firing Rate 0 scfm NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Natural Gas Firing Rate 0 scfm NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Total # of Burners in Use 12 of 12 Collected during M23 run 1 0 2Unit 1 Total # of Burners in Use 12 of 12 Collected during M23 run 2 0 3 Unit 1 Total # of Burners in Use 12 of 12 Collected during M23 run 3 0 4Unit 1 Total # of Burners in Use 0 of 12 NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Total # of Burners in Use 0 of 12 NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Total # of Burners in Use 0 of 12 NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Total # of Burners in Use 32 of 32 Collected during M23 run 1 0 2Unit 2 Total # of Burners in Use 32 of 32 Collected during M23 run 2 0 3 Unit 2 Total # of Burners in Use 32 of 32 Collected during M23 run 3 0 4Unit 2 Total # of Burners in Use 0 of 32 NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Total # of Burners in Use 0 of 32 NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Total # of Burners in Use 0 of 32 NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Coal Firing Rate 190.73 1000 lb/hr Collected during M23 run 1 0 2Unit 2 Coal Firing Rate 190.461000 lb/hr Collected during M23 run 2 0
Tuesday, February 15, 2011 Page 19 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 3 Unit 2 Coal Firing Rate 192.741000 lb/hr Collected during M23 run 3 0 4Unit 2 Coal Firing Rate 497.8 1000 lb/hr Collected during run 1 of M29 and OTM27/28 0
5 Unit 2 Coal Firing Rate 496.561000 lb/hr Collected during run 2 of M29 and OTM27/28 0
6Unit 2 Coal Firing Rate 481.07 1000 lb/hr Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 Excess O2 2.56 % Collected during M23 run 1 0 2Unit 1 Excess O2 2.38 % Collected during M23 run 2 0 3 Unit 1 Excess O2 2.39 % Collected during M23 run 3 0 4Unit 1 Excess O2 0 % NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Excess O2 0 % NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Excess O2 0 % NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Excess O2 2.57 % Collected during M23 run 1 0 2Unit 2 Excess O2 2.58 % Collected during M23 run 2 0 3 Unit 2 Excess O2 2.15 % Collected during M23 run 3 0 4Unit 2 Excess O2 0 % NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Excess O2 0 % NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Excess O2 0 % NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Furnace Draft -0.2 in H2O Collected during M23 run 1 0 Tuesday, February 15, 2011 Page 20 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 2Unit 1 Furnace Draft -0.2 in H2O Collected during M23 run 2 0 3 Unit 1 Furnace Draft -0.2 in H2O Collected during M23 run 3 0 4Unit 1 Furnace Draft 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Furnace Draft 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Furnace Draft 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Furnace Draft -0.33 in H2O Collected during M23 run 1 0 2Unit 2 Furnace Draft -0.32 in H2O Collected during M23 run 2 0 3 Unit 2 Furnace Draft -0.32 in H2O Collected during M23 run 3 0 4Unit 2 Furnace Draft 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Furnace Draft 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Furnace Draft 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 F.D. Fan A 46.05 amps Collected during M23 run 1 0 2Unit 1 F.D. Fan A 44.95 amps Collected during M23 run 2 0 3 Unit 1 F.D. Fan A 44.63 amps Collected during M23 run 3 0 4Unit 1 F.D. Fan A 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 F.D. Fan A 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 21 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6Unit 1 F.D. Fan A 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 F.D. Fan A 67.61 amps Collected during M23 run 1 0 2Unit 2 F.D. Fan A 67.15 amps Collected during M23 run 2 0 3 Unit 2 F.D. Fan A 66.36 amps Collected during M23 run 3 0 4Unit 2 F.D. Fan A 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 F.D. Fan A 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 F.D. Fan A 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 F.D. Fan B 45.21 amps Collected during M23 run 1 0 2Unit 1 F.D. Fan B 44.38 amps Collected during M23 run 2 0 3 Unit 1 F.D. Fan B 44.67 amps Collected during M23 run 3 0 4Unit 1 F.D. Fan B 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 F.D. Fan B 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 F.D. Fan B 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 F.D. Fan B 58.55 amps Collected during M23 run 1 0 2Unit 2 F.D. Fan B 58.23 amps Collected during M23 run 2 0 3 Unit 2 F.D. Fan B 57.61 amps Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 22 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4Unit 2 F.D. Fan B 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 F.D. Fan B 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 F.D. Fan B 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 F.D. Fan A 6.66 in H2O Collected during M23 run 1 0 2Unit 1 F.D. Fan A 5.93 in H2O Collected during M23 run 2 0 3 Unit 1 F.D. Fan A 6.18 in H2O Collected during M23 run 3 0 4Unit 1 F.D. Fan A 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 F.D. Fan A 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 F.D. Fan A 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 F.D. Fan B 6.55 in H2O Collected during M23 run 1 0 2Unit 1 F.D. Fan B 5.64 in H2O Collected during M23 run 2 0 3 Unit 1 F.D. Fan B 6.02 in H2O Collected during M23 run 3 0 4Unit 1 F.D. Fan B 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 F.D. Fan B 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 F.D. Fan B 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 23 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 1 Unit 2 F.D. Fan A 8.47 in H2O Collected during M23 run 1 0 2Unit 2 F.D. Fan A 8.32 in H2O Collected during M23 run 2 0 3 Unit 2 F.D. Fan A 8.41 in H2O Collected during M23 run 3 0 4Unit 2 F.D. Fan A 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 F.D. Fan A 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 F.D. Fan A 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 F.D. Fan B 8.05 in H2O Collected during M23 run 1 0 2Unit 2 F.D. Fan B 7.92 in H2O Collected during M23 run 2 0 3 Unit 2 F.D. Fan B 8.03 in H2O Collected during M23 run 3 0 4Unit 2 F.D. Fan B 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 F.D. Fan B 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 F.D. Fan B 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 I.D. Fan 179.14 amps Collected during M23 run 1 0 2Unit 1 I.D. Fan 173.55 amps Collected during M23 run 2 0 3 Unit 1 I.D. Fan 171.54 amps Collected during M23 run 3 0 4Unit 1 I.D. Fan 0 amps NOT collected during run 1 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 24 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 Unit 1 I.D. Fan 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 I.D. Fan 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 I.D. Fan A 297.76 amps Collected during M23 run 1 0 2Unit 2 I.D. Fan A 290.37 amps Collected during M23 run 2 0 3 Unit 2 I.D. Fan A 295.41 amps Collected during M23 run 3 0 4Unit 2 I.D. Fan A 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 I.D. Fan A 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 I.D. Fan A 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 I.D. Fan Inlet Draft -11.69 in H2O Collected during M23 run 1 0 2Unit 1 I.D. Fan Inlet Draft -11.41 in H2O Collected during M23 run 2 0 3 Unit 1 I.D. Fan Inlet Draft -11.18 in H2O Collected during M23 run 3 0 4Unit 1 I.D. Fan Inlet Draft 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 I.D. Fan Inlet Draft 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 I.D. Fan Inlet Draft 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 I.D. Fan B 0.04 in H2O Collected during M23 run 1 0 2Unit 2 I.D. Fan B 0.04 in H2O Collected during M23 run 2 0
Tuesday, February 15, 2011 Page 25 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 3 Unit 2 I.D. Fan B 0.03 in H2O Collected during M23 run 3 0 4Unit 2 I.D. Fan B 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 I.D. Fan B 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 I.D. Fan B 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 I.D. Fan Outlet Draft -0.14 in H2O Collected during M23 run 1 0 2Unit 1 I.D. Fan Outlet Draft -0.16 in H2O Collected during M23 run 2 0 3 Unit 1 I.D. Fan Outlet Draft -0.13 in H2O Collected during M23 run 3 0 4Unit 1 I.D. Fan Outlet Draft 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 I.D. Fan Outlet Draft 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 I.D. Fan Outlet Draft 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 I.D. Fan A 0.05 in H2O Collected during M23 run 1 0 2Unit 2 I.D. Fan A 0.04 in H2O Collected during M23 run 2 0 3 Unit 2 I.D. Fan A 0.03 in H2O Collected during M23 run 3 0 4Unit 2 I.D. Fan A 0 in H2O NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 I.D. Fan A 0 in H2O NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 26 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6Unit 2 I.D. Fan A 0 in H2O NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Feedwater Flow Rate 408.03 1000 lb/hr Collected during M23 run 1 0 2Unit 1 Feedwater Flow Rate 404.88 1000 lb/hr Collected during M23 run 2 0 3 Unit 1 Feedwater Flow Rate 402.23 1000 lb/hr Collected during M23 run 3 0 4Unit 1 Feedwater Flow Rate 0 1000 lb/hr NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Feedwater Flow Rate 0 1000 lb/hr NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Feedwater Flow Rate 0 1000 lb/hr NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Feedwater Flow Rate 1141.91000 lb/hr Collected during M23 run 1 0 2Unit 2 Feedwater Flow Rate 1125 1000 lb/hr Collected during M23 run 2 0 3 Unit 2 Feedwater Flow Rate 1155.1 1000 lb/hr Collected during M23 run 3 0 4Unit 2 Feedwater Flow Rate 0 1000 lb/hr NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Feedwater Flow Rate 0 1000 lb/hr NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Feedwater Flow Rate 0 1000 lb/hr NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Feedwater Temp. 428.94 Deg F Collected during M23 run 1 0 2Unit 1 Feedwater Temp. 428.51 Deg F Collected during M23 run 2 0 3 Unit 1 Feedwater Temp. 427.8 Deg F Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 27 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4Unit 1 Feedwater Temp. 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Feedwater Temp. 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Feedwater Temp. 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Feedwater Temp. 452.52 Deg F Collected during M23 run 1 0 2Unit 2 Feedwater Temp. 451.46 Deg F Collected during M23 run 2 0 3 Unit 2 Feedwater Temp. 452.22 Deg F Collected during M23 run 3 0 4Unit 2 Feedwater Temp. 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Feedwater Temp. 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Feedwater Temp. 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Hotwell - Condensate Temp 95.05 Deg F Collected during M23 run 1 0 2Unit 1 Hotwell - Condensate Temp 96.39 Deg F Collected during M23 run 2 0 3 Unit 1 Hotwell - Condensate Temp 97.04 Deg F Collected during M23 run 3 0 4Unit 1 Hotwell - Condensate Temp 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Hotwell - Condensate Temp 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Hotwell - Condensate Temp 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 28 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 1 Unit 2 Hotwell - Condensate Temp 98.09 Deg F Collected during M23 run 1 0 2Unit 2 Hotwell - Condensate Temp 99.15 Deg F Collected during M23 run 2 0 3 Unit 2 Hotwell - Condensate Temp 99.94 Deg F Collected during M23 run 3 0 4Unit 2 Hotwell - Condensate Temp 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Hotwell - Condensate Temp 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Hotwell - Condensate Temp 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Steam Pressure 1449.9 psig Collected during M23 run 1 0 2Unit 1 Steam Pressure 1450 psig Collected during M23 run 2 0 3 Unit 1 Steam Pressure 1449.7 psig Collected during M23 run 3 0 4Unit 1 Steam Pressure 0 psig NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Steam Pressure 0 psig NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Steam Pressure 0 psig NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Steam Pressure 2000.7 psig Collected during M23 run 1 0 2Unit 2 Steam Pressure 2000.2 psig Collected during M23 run 2 0 3 Unit 2 Steam Pressure 2000.3 psig Collected during M23 run 3 0 4Unit 2 Steam Pressure 0 psig NOT collected during run 1 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 29 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 Unit 2 Steam Pressure 0 psig NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Steam Pressure 0 psig NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Steam Temp Superheater 968.63 Deg F Collected during M23 run 1 0 2Unit 1 Steam Temp Superheater 970.35 Deg F Collected during M23 run 2 0 3 Unit 1 Steam Temp Superheater 967.36 Deg F Collected during M23 run 3 0 4Unit 1 Steam Temp Superheater 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Steam Temp Superheater 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Steam Temp Superheater 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Steam Temp Superheater 1017 Deg F Collected during M23 run 1 0 2Unit 2 Steam Temp Superheater 1015.7 Deg F Collected during M23 run 2 0 3 Unit 2 Steam Temp Superheater 1014.7 Deg F Collected during M23 run 3 0 4Unit 2 Steam Temp Superheater 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Steam Temp Superheater 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Steam Temp Superheater 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Steam Temp Reheat 999.28 Deg F Collected during M23 run 1 0 2Unit 1 Steam Temp Reheat 1003.3 Deg F Collected during M23 run 2 0
Tuesday, February 15, 2011 Page 30 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 3 Unit 1 Steam Temp Reheat 1000.9 Deg F Collected during M23 run 3 0 4Unit 1 Steam Temp Reheat 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Steam Temp Reheat 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Steam Temp Reheat 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Steam Temp Reheat 1022.8 Deg F Collected during M23 run 1 0 2Unit 2 Steam Temp Reheat 1026.8 Deg F Collected during M23 run 2 0 3 Unit 2 Steam Temp Reheat 1015.5 Deg F Collected during M23 run 3 0 4Unit 2 Steam Temp Reheat 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Steam Temp Reheat 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Steam Temp Reheat 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Air In Temp 1A 102.02 Deg F Collected during M23 run 1 0 2Unit 1 Air In Temp 1A 104.96 Deg F Collected during M23 run 2 0 3 Unit 1 Air In Temp 1A 105.81 Deg F Collected during M23 run 3 0 4Unit 1 Air In Temp 1A 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Air In Temp 1A 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 31 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6Unit 1 Air In Temp 1A 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Air In Temp 2A 86.8 Deg F Collected during M23 run 1 0 2Unit 2 Air In Temp 2A 92.73 Deg F Collected during M23 run 2 0 3 Unit 2 Air In Temp 2A 94.79 Deg F Collected during M23 run 3 0 4Unit 2 Air In Temp 2A 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Air In Temp 2A 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Air In Temp 2A 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Air In Temp 1B 101.85 Deg F Collected during M23 run 1 0 2Unit 1 Air In Temp 1B 105.3 Deg F Collected during M23 run 2 0 3 Unit 1 Air In Temp 1B 107.24 Deg F Collected during M23 run 3 0 4Unit 1 Air In Temp 1B 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Air In Temp 1B 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Air In Temp 1B 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Air In Temp 2B 88.88 Deg F Collected during M23 run 1 0 2Unit 2 Air In Temp 2B 93.48 Deg F Collected during M23 run 2 0 3 Unit 2 Air In Temp 2B 94.85 Deg F Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 32 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4Unit 2 Air In Temp 2B 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Air In Temp 2B 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Air In Temp 2B 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Air Out Temp 559.44 Deg F Collected during M23 run 1 0 2Unit 1 Air Out Temp 561.51 Deg F Collected during M23 run 2 0 3 Unit 1 Air Out Temp 559.06 Deg F Collected during M23 run 3 0 4Unit 1 Air Out Temp 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Air Out Temp 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Air Out Temp 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Air Out Temp 2A 586.55 Deg F Collected during M23 run 1 0 2Unit 2 Air Out Temp 2A 586.88 Deg F Collected during M23 run 2 0 3 Unit 2 Air Out Temp 2A 589.37 Deg F Collected during M23 run 3 0 4Unit 2 Air Out Temp 2A 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Air Out Temp 2A 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Air Out Temp 2A 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 33 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 1 Unit 2 Air Out Temp 2B 576.24 Deg F Collected during M23 run 1 0 2Unit 2 Air Out Temp 2B 575.1 Deg F Collected during M23 run 2 0 3 Unit 2 Air Out Temp 2B 574.59 Deg F Collected during M23 run 3 0 4Unit 2 Air Out Temp 2B 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Air Out Temp 2B 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Air Out Temp 2B 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Gas In Temp - Leaving Econ 646.02 Deg F Collected during M23 run 1 0 2Unit 1 Gas In Temp - Leaving Econ 646.71 Deg F Collected during M23 run 2 0 3 Unit 1 Gas In Temp - Leaving Econ 643.43 Deg F Collected during M23 run 3 0 4Unit 1 Gas In Temp - Leaving Econ 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Gas In Temp - Leaving Econ 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Gas In Temp - Leaving Econ 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Gas In Temp 2A 662.75 Deg F Collected during M23 run 1 0 2Unit 2 Gas In Temp 2A 661.99 Deg F Collected during M23 run 2 0 3 Unit 2 Gas In Temp 2A 662.11 Deg F Collected during M23 run 3 0 4Unit 2 Gas In Temp 2A 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 34 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 Unit 2 Gas In Temp 2A 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Gas In Temp 2A 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Gas In Temp 2B 658.47 Deg F Collected during M23 run 1 0 2Unit 2 Gas In Temp 2B 656.59 Deg F Collected during M23 run 2 0 3 Unit 2 Gas In Temp 2B 650.68 Deg F Collected during M23 run 3 0 4Unit 2 Gas In Temp 2B 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Gas In Temp 2B 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Gas In Temp 2B 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 I.D. Fan B 245.27 amps Collected during M23 run 1 0 2Unit 2 I.D. Fan B 234.97 amps Collected during M23 run 2 0 3 Unit 2 I.D. Fan B 243.72 amps Collected during M23 run 3 0 4Unit 2 I.D. Fan B 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 I.D. Fan B 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 I.D. Fan B 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Lower AH Gas Out Temp 375.05 Deg F Collected during M23 run 1 0 2Unit 1 Lower AH Gas Out Temp 379.68 Deg F Collected during M23 run 2 0
Tuesday, February 15, 2011 Page 35 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 3 Unit 1 Lower AH Gas Out Temp 376.09 Deg F Collected during M23 run 3 0 4Unit 1 Lower AH Gas Out Temp 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Lower AH Gas Out Temp 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Lower AH Gas Out Temp 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Gas Out Temp 2A 337 Deg F Collected during M23 run 1 0 2Unit 2 Gas Out Temp 2A 340.01 Deg F Collected during M23 run 2 0 3 Unit 2 Gas Out Temp 2A 341.18 Deg F Collected during M23 run 3 0 4Unit 2 Gas Out Temp 2A 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Gas Out Temp 2A 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Gas Out Temp 2A 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Gas Out Temp 2B 349.57 Deg F Collected during M23 run 1 0 2Unit 2 Gas Out Temp 2B 352.92 Deg F Collected during M23 run 2 0 3 Unit 2 Gas Out Temp 2B 350.74 Deg F Collected during M23 run 3 0 4Unit 2 Gas Out Temp 2B 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Gas Out Temp 2B 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 36 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6Unit 2 Gas Out Temp 2B 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 1A Primary Amps 2.48 amps Collected during M23 run 1 0 2 1A Primary Amps 1.95 amps Collected during M23 run 2 0 3 1A Primary Amps 1.82 amps Collected during M23 run 3 0 4 1A Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 1A Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 1A Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 1B Primary Amps 2.68 amps Collected during M23 run 1 0 2 1B Primary Amps 2.44 amps Collected during M23 run 2 0 3 1B Primary Amps 2.53 amps Collected during M23 run 3 0 4 1B Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 1B Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 1B Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 1C Primary Amps 3.88 amps Collected during M23 run 1 0 2 1C Primary Amps 3.29 amps Collected during M23 run 2 0 3 1C Primary Amps 3.38 amps Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 37 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4 1C Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 1C Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 1C Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 1D Primary Amps 5.4 amps Collected during M23 run 1 0 2 1D Primary Amps 4.95 amps Collected during M23 run 2 0 3 1D Primary Amps 4.95 amps Collected during M23 run 3 0 4 1D Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 1D Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 1D Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 1A Primary Volts 131.54 volts Collected during M23 run 1 0 2 1A Primary Volts 120.92 volts Collected during M23 run 2 0 3 1A Primary Volts 118 volts Collected during M23 run 3 0 4 1A Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 1A Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 1A Primary Volts 0 volts Collected during run 3 of M29 and OTM27/28 0
1 1B Primary Volts 152.32 volts Collected during M23 run 1 0 Tuesday, February 15, 2011 Page 38 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 2 1B Primary Volts 142.41 volts Collected during M23 run 2 0 3 1B Primary Volts 147.03 volts Collected during M23 run 3 0 4 1B Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 1B Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 1B Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 1C Primary Volts 169.89 volts Collected during M23 run 1 0 2 1C Primary Volts 162.62 volts Collected during M23 run 2 0 3 1C Primary Volts 163.83 volts Collected during M23 run 3 0 4 1C Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 1C Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 1C Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 1D Primary Volts 161.24 volts Collected during M23 run 1 0 2 1D Primary Volts 156.86 volts Collected during M23 run 2 0 3 1D Primary Volts 157.4 volts Collected during M23 run 3 0 4 1D Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 1D Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 39 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6 1D Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 1A Secondary mADC 39.31 mADC Collected during M23 run 1 0 2 1A Secondary mADC 34.03 mADC Collected during M23 run 2 0 3 1A Secondary mADC 33.03 mADC Collected during M23 run 3 0 4 1A Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 1A Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 1A Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 1B Secondary mADC 26.8 mADC Collected during M23 run 1 0 2 1B Secondary mADC 22.94 mADC Collected during M23 run 2 0 3 1B Secondary mADC 24.37 mADC Collected during M23 run 3 0 4 1B Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 1B Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 1B Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 1C Secondary mADC 34.64 mADC Collected during M23 run 1 0 2 1C Secondary mADC 29.39 mADC Collected during M23 run 2 0 3 1C Secondary mADC 30.06 mADC Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 40 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4 1C Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 1C Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 1C Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 1D Secondary mADC 74.81 mADC Collected during M23 run 1 0 2 1D Secondary mADC 70.89 mADC Collected during M23 run 2 0 3 1D Secondary mADC 71 mADC Collected during M23 run 3 0 4 1D Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 1D Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 1D Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 1A Secondary kV 31.73 kV Collected during M23 run 1 0 2 1A Secondary kV 30.28 kV Collected during M23 run 2 0 3 1A Secondary kV 29.71 kV Collected during M23 run 3 0 4 1A Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 1A Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 1A Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 41 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 1 1B Secondary kV 36.07 kV Collected during M23 run 1 0 2 1B Secondary kV 34.86 kV Collected during M23 run 2 0 3 1B Secondary kV 35.54 kV Collected during M23 run 3 0 4 1B Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 1B Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 1B Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 1C Secondary kV 34.26 kV Collected during M23 run 1 0 2 1C Secondary kV 33.63 kV Collected during M23 run 2 0 3 1C Secondary kV 33.72 kV Collected during M23 run 3 0 4 1C Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 1C Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 1C Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 1D Secondary kV 31.2 kV Collected during M23 run 1 0 2 1D Secondary kV 30.59 kV Collected during M23 run 2 0 3 1D Secondary kV 30.64 kV Collected during M23 run 3 0 4 1D Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 42 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 1D Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 1D Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 1A Spark Rate 197.15 sprk/min Collected during M23 run 1 0 2 1A Spark Rate 193.74 sprk/min Collected during M23 run 2 0 3 1A Spark Rate 195.89 sprk/min Collected during M23 run 3 0 4 1A Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 1A Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 1A Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 1B Spark Rate 98.68 sprk/min Collected during M23 run 1 0 2 1B Spark Rate 99.72 sprk/min Collected during M23 run 2 0 3 1B Spark Rate 99.32 sprk/min Collected during M23 run 3 0 4 1B Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 1B Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 1B Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 1C Spark Rate 143.08 sprk/min Collected during M23 run 1 0 2 1C Spark Rate 144.04 sprk/min Collected during M23 run 2 0
Tuesday, February 15, 2011 Page 43 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 3 1C Spark Rate 143.93 sprk/min Collected during M23 run 3 0 4 1C Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 1C Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 1C Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 1D Spark Rate 100.93 sprk/min Collected during M23 run 1 0 2 1D Spark Rate 100.99 sprk/min Collected during M23 run 2 0 3 1D Spark Rate 101 sprk/min Collected during M23 run 3 0 4 1D Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 1D Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 1D Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 2A Primary Amps 84.45 amps Collected during M23 run 1 0 2 2A Primary Amps 83.6 amps Collected during M23 run 2 0 3 2A Primary Amps 82.32 amps Collected during M23 run 3 0 4 2A Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 2A Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 44 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6 2A Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 2B Primary Amps 80.24 amps Collected during M23 run 1 0 2 2B Primary Amps 80.35 amps Collected during M23 run 2 0 3 2B Primary Amps 78.89 amps Collected during M23 run 3 0 4 2B Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 2B Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 2B Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 2C Primary Amps 81.38 amps Collected during M23 run 1 0 2 2C Primary Amps 79.47 amps Collected during M23 run 2 0 3 2C Primary Amps 80.77 amps Collected during M23 run 3 0 4 2C Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 2C Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 2C Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 2D Primary Amps 64.97 amps Collected during M23 run 1 0 2 2D Primary Amps 60.36 amps Collected during M23 run 2 0 3 2D Primary Amps 63.15 amps Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 45 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4 2D Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 2D Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 2D Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 2E Primary Amps 72.92 amps Collected during M23 run 1 0 2 2E Primary Amps 64.06 amps Collected during M23 run 2 0 3 2E Primary Amps 63.32 amps Collected during M23 run 3 0 4 2E Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 2E Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 2E Primary Amps 0 amps Collected during run 3 of M29 and OTM27/28 0
1 2F Primary Amps 11.63 amps Collected during M23 run 1 0 2 2F Primary Amps 10.92 amps Collected during M23 run 2 0 3 2F Primary Amps 12.22 amps Collected during M23 run 3 0 4 2F Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 2F Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 2F Primary Amps 0 amps Collected during run 3 of M29 and OTM27/28 0
1 2G Primary Amps 39.39 amps Collected during M23 run 1 0
Tuesday, February 15, 2011 Page 46 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 2 2G Primary Amps 33.39 amps Collected during M23 run 2 0 3 2G Primary Amps 32.54 amps Collected during M23 run 3 0 4 2G Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 2G Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 2G Primary Amps 0 amps Collected during run 3 of M29 and OTM27/28 0
1 2H Primary Amps 37.21 amps Collected during M23 run 1 0 2 2H Primary Amps 35.75 amps Collected during M23 run 2 0 3 2H Primary Amps 36.85 amps Collected during M23 run 3 0 4 2H Primary Amps 0 amps NOT collected during run 1 of M29 and OTM27/28 0

5 2H Primary Amps 0 amps NOT Collected during run 2 of M29 and OTM27/28 0

6 2H Primary Amps 0 amps NOT Collected during run 3 of M29 and OTM27/28 0

1 2A Primary Volts 382.74 volts Collected during M23 run 1 0 2 2A Primary Volts 383.2 volts Collected during M23 run 2 0 3 2A Primary Volts 379.76 volts Collected during M23 run 3 0 4 2A Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 2A Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 47 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6 2A Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 2B Primary Volts 408.83 volts Collected during M23 run 1 0 2 2B Primary Volts 409.79 volts Collected during M23 run 2 0 3 2B Primary Volts 404.11 volts Collected during M23 run 3 0 4 2B Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 2B Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 2B Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 2C Primary Volts 408.56 volts Collected during M23 run 1 0 2 2C Primary Volts 408.01 volts Collected during M23 run 2 0 3 2C Primary Volts 405.58 volts Collected during M23 run 3 0 4 2C Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 2C Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 2C Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 2D Primary Volts 402.62 volts Collected during M23 run 1 0 2 2D Primary Volts 396.33 volts Collected during M23 run 2 0 3 2D Primary Volts 400.85 volts Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 48 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4 2D Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 2D Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 2D Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 2E Primary Volts 433.39 volts Collected during M23 run 1 0 2 2E Primary Volts 414.68 volts Collected during M23 run 2 0 3 2E Primary Volts 409.52 volts Collected during M23 run 3 0 4 2E Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 2E Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 2E Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 2F Primary Volts 209.27 volts Collected during M23 run 1 0 2 2F Primary Volts 206.97 volts Collected during M23 run 2 0 3 2F Primary Volts 211.34 volts Collected during M23 run 3 0 4 2F Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 2F Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 2F Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 49 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 1 2G Primary Volts 434.21 volts Collected during M23 run 1 0 2 2G Primary Volts 413.38 volts Collected during M23 run 2 0 3 2G Primary Volts 405.76 volts Collected during M23 run 3 0 4 2G Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 2G Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 2G Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 2H Primary Volts 440.9 volts Collected during M23 run 1 0 2 2H Primary Volts 440.13 volts Collected during M23 run 2 0 3 2H Primary Volts 439.98 volts Collected during M23 run 3 0 4 2H Primary Volts 0 volts NOT collected during run 1 of M29 and OTM27/28 0

5 2H Primary Volts 0 volts NOT Collected during run 2 of M29 and OTM27/28 0

6 2H Primary Volts 0 volts NOT Collected during run 3 of M29 and OTM27/28 0

1 2A Secondary mADC 420.6 mADC Collected during M23 run 1 0 2 2A Secondary mADC 417.92 mADC Collected during M23 run 2 0 3 2A Secondary mADC 407.46 mADC Collected during M23 run 3 0 4 2A Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 50 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 2A Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 2A Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 2B Secondary mADC 405.54 mADC Collected during M23 run 1 0 2 2B Secondary mADC 408.82 mADC Collected during M23 run 2 0 3 2B Secondary mADC 396.33 mADC Collected during M23 run 3 0 4 2B Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 2B Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 2B Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 2C Secondary mADC 389.99 mADC Collected during M23 run 1 0 2 2C Secondary mADC 382.07 mADC Collected during M23 run 2 0 3 2C Secondary mADC 384.78 mADC Collected during M23 run 3 0 4 2C Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 2C Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 2C Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 2D Secondary mADC 336.35 mADC Collected during M23 run 1 0 2 2D Secondary mADC 306.44 mADC Collected during M23 run 2 0
Tuesday, February 15, 2011 Page 51 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 3 2D Secondary mADC 317.5 mADC Collected during M23 run 3 0 4 2D Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 2D Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 2D Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 2E Secondary mADC 356.03 mADC Collected during M23 run 1 0 2 2E Secondary mADC 306.32 mADC Collected during M23 run 2 0 3 2E Secondary mADC 298.44 mADC Collected during M23 run 3 0 4 2E Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 2E Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 2E Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 2F Secondary mADC 41.61 mADC Collected during M23 run 1 0 2 2F Secondary mADC 38.83 mADC Collected during M23 run 2 0 3 2F Secondary mADC 43.85 mADC Collected during M23 run 3 0 4 2F Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 2F Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 52 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6 2F Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 2G Secondary mADC 182.95 mADC Collected during M23 run 1 0 2 2G Secondary mADC 154.67 mADC Collected during M23 run 2 0 3 2G Secondary mADC 150.75 mADC Collected during M23 run 3 0 4 2G Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 2G Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 2G Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 2H Secondary mADC 187.32 mADC Collected during M23 run 1 0 2 2H Secondary mADC 182.13 mADC Collected during M23 run 2 0 3 2H Secondary mADC 188.75 mADC Collected during M23 run 3 0 4 2H Secondary mADC 0 mADC NOT collected during run 1 of M29 and OTM27/28 0

5 2H Secondary mADC 0 mADC NOT Collected during run 2 of M29 and OTM27/28 0

6 2H Secondary mADC 0 mADC NOT Collected during run 3 of M29 and OTM27/28 0

1 2A Secondary kV 49.42 kV Collected during M23 run 1 0 2 2A Secondary kV 49.44 kV Collected during M23 run 2 0 3 2A Secondary kV 49.16 kV Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 53 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4 2A Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 2A Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 2A Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 2B Secondary kV 50.6 kV Collected during M23 run 1 0 2 2B Secondary kV 50.75 kV Collected during M23 run 2 0 3 2B Secondary kV 50.29 kV Collected during M23 run 3 0 4 2B Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 2B Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 2B Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 2C Secondary kV 51.25 kV Collected during M23 run 1 0 2 2C Secondary kV 51.46 kV Collected during M23 run 2 0 3 2C Secondary kV 51 kV Collected during M23 run 3 0 4 2C Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 2C Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 2C Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 54 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 1 2D Secondary kV 49.94 kV Collected during M23 run 1 0 2 2D Secondary kV 49.85 kV Collected during M23 run 2 0 3 2D Secondary kV 49.71 kV Collected during M23 run 3 0 4 2D Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 2D Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 2D Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 2E Secondary kV 52.45 kV Collected during M23 run 1 0 2 2E Secondary kV 51.49 kV Collected during M23 run 2 0 3 2E Secondary kV 50.92 kV Collected during M23 run 3 0 4 2E Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 2E Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 2E Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 2F Secondary kV 45.08 kV Collected during M23 run 1 0 2 2F Secondary kV 45.07 kV Collected during M23 run 2 0 3 2F Secondary kV 45.07 kV Collected during M23 run 3 0 4 2F Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 55 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 2F Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 2F Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 2G Secondary kV 55.42 kV Collected during M23 run 1 0 2 2G Secondary kV 54.21 kV Collected during M23 run 2 0 3 2G Secondary kV 53.37 kV Collected during M23 run 3 0 4 2G Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 2G Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 2G Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 2H Secondary kV 57.2 kV Collected during M23 run 1 0 2 2H Secondary kV 57.18 kV Collected during M23 run 2 0 3 2H Secondary kV 56.87 kV Collected during M23 run 3 0 4 2H Secondary kV 0 kV NOT collected during run 1 of M29 and OTM27/28 0

5 2H Secondary kV 0 kV NOT Collected during run 2 of M29 and OTM27/28 0

6 2H Secondary kV 0 kV NOT Collected during run 3 of M29 and OTM27/28 0

1 2A Spark Rate 98.35 sprk/min Collected during M23 run 1 0 2 2A Spark Rate 98.41 sprk/min Collected during M23 run 2 0
Tuesday, February 15, 2011 Page 56 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 3 2A Spark Rate 98.47 sprk/min Collected during M23 run 3 0 4 2A Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 2A Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 2A Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 2B Spark Rate 98.64 sprk/min Collected during M23 run 1 0 2 2B Spark Rate 98.77 sprk/min Collected during M23 run 2 0 3 2B Spark Rate 98.82 sprk/min Collected during M23 run 3 0 4 2B Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 2B Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 2B Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 2C Spark Rate 98.85 sprk/min Collected during M23 run 1 0 2 2C Spark Rate 98.87 sprk/min Collected during M23 run 2 0 3 2C Spark Rate 98.82 sprk/min Collected during M23 run 3 0 4 2C Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 2C Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 57 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6 2C Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 2D Spark Rate 15.71 sprk/min Collected during M23 run 1 0 2 2D Spark Rate 25.73 sprk/min Collected during M23 run 2 0 3 2D Spark Rate 39.04 sprk/min Collected during M23 run 3 0 4 2D Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 2D Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 2D Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 2E Spark Rate 86 sprk/min Collected during M23 run 1 0 2 2E Spark Rate 95.43 sprk/min Collected during M23 run 2 0 3 2E Spark Rate 99.54 sprk/min Collected during M23 run 3 0 4 2E Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 2E Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 2E Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 2F Spark Rate 0 sprk/min Collected during M23 run 1 0 2 2F Spark Rate 0 sprk/min Collected during M23 run 2 0 3 2F Spark Rate 0 sprk/min Collected during M23 run 3 0

Tuesday, February 15, 2011 Page 58 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 4 2F Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 2F Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 2F Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 2G Spark Rate 39.39 sprk/min Collected during M23 run 1 0 2 2G Spark Rate 33.39 sprk/min Collected during M23 run 2 0 3 2G Spark Rate 32.54 sprk/min Collected during M23 run 3 0 4 2G Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 2G Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 2G Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

1 2H Spark Rate 2.67 sprk/min Collected during M23 run 1 0 2 2H Spark Rate 22.98 sprk/min Collected during M23 run 2 0 3 2H Spark Rate 25.57 sprk/min Collected during M23 run 3 0 4 2H Spark Rate 0 sprk/min NOT collected during run 1 of M29 and OTM27/28 0

5 2H Spark Rate 0 sprk/min NOT Collected during run 2 of M29 and OTM27/28 0

6 2H Spark Rate 0 sprk/min NOT Collected during run 3 of M29 and OTM27/28 0

Tuesday, February 15, 2011 Page 59 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 1 Unit 1 Baghouse Avg. Inlet Temp 340.15 Deg F Collected during M23 run 1 0 2Unit 1 Baghouse Avg. Inlet Temp 342.63 Deg F Collected during M23 run 2 0 3 Unit 1 Baghouse Avg. Inlet Temp 341.01 Deg F Collected during M23 run 3 0 4Unit 1 Baghouse Avg. Inlet Temp 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Baghouse Avg. Inlet Temp 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Baghouse Avg. Inlet Temp 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Baghouse Avg. Outlet Temp 333.96 Deg F Collected during M23 run 1 0 2Unit 1 Baghouse Avg. Outlet Temp 337.94 Deg F Collected during M23 run 2 0 3 Unit 1 Baghouse Avg. Outlet Temp 334.82 Deg F Collected during M23 run 3 0 4Unit 1 Baghouse Avg. Outlet Temp 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 1 Baghouse Avg. Outlet Temp 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 1 Baghouse Avg. Outlet Temp 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 1 Baghouse Avg. Pressure Drop 4.65 in WC Collected during M23 run 1 0 2Unit 1 Baghouse Avg. Pressure Drop 4.62 in WC Collected during M23 run 2 0 3 Unit 1 Baghouse Avg. Pressure Drop 4.61 in WC Collected during M23 run 3 0 4Unit 1 Baghouse Avg. Pressure Drop 6.13 in WC Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 Baghouse Avg. Pressure Drop 5.99 in WC Collected during run 2 of M29 and OTM27/28 0
Tuesday, February 15, 2011 Page 60 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6Unit 1 Baghouse Avg. Pressure Drop 6.01 in WC Collected during run 3 of M29 and OTM27/28 0
1 Unit 2 Baghouse Avg. Inlet Temp 323.4 Deg F Collected during M23 run 1 0 2Unit 2 Baghouse Avg. Inlet Temp 326.53 Deg F Collected during M23 run 2 0 3 Unit 2 Baghouse Avg. Inlet Temp 326.28 Deg F Collected during M23 run 3 0 4Unit 2 Baghouse Avg. Inlet Temp 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Baghouse Avg. Inlet Temp 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Baghouse Avg. Inlet Temp 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Baghouse Avg. Outlet Temp 323.02 Deg F Collected during M23 run 1 0 2Unit 2 Baghouse Avg. Outlet Temp 325.71 Deg F Collected during M23 run 2 0 3 Unit 2 Baghouse Avg. Outlet Temp 324.82 Deg F Collected during M23 run 3 0 4Unit 2 Baghouse Avg. Outlet Temp 0 Deg F NOT collected during run 1 of M29 and OTM27/28 0

5 Unit 2 Baghouse Avg. Outlet Temp 0 Deg F NOT Collected during run 2 of M29 and OTM27/28 0

6Unit 2 Baghouse Avg. Outlet Temp 0 Deg F NOT Collected during run 3 of M29 and OTM27/28 0

1 Unit 2 Baghouse Avg. Pressure Drop 3.72 in WC Collected during M23 run 1 0 2Unit 2 Baghouse Avg. Pressure Drop 3.37 in WC Collected during M23 run 2 0 3 Unit 2 Baghouse Avg. Pressure Drop 4.99 in WC Collected during M23 run 3 0 4Unit 2 Baghouse Avg. Pressure Drop 4.92 in WC Collected during run 1 of M29 and OTM27/28 0
Tuesday, February 15, 2011 Page 61 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 5 Unit 2 Baghouse Avg. Pressure Drop 5.16 in WC Collected during run 2 of M29 and OTM27/28 0
6Unit 2 Baghouse Avg. Pressure Drop 4.87 in WC Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 ACI Injection Rate A-Feed 0.13 lb/min Collected during M23 run 1 0 2Unit 1 ACI Injection Rate A-Feed 0 lb/min Collected during M23 run 2 0 3 Unit 1 ACI Injection Rate A-Feed 0.06 lb/min Collected during M23 run 3 0 4Unit 1 ACI Injection Rate A-Feed 0 lb/min Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 ACI Injection Rate A-Feed 0 lb/min Collected during run 2 of M29 and OTM27/28 0
6Unit 1 ACI Injection Rate A-Feed 0 lb/min Collected during run 3 of M29 and OTM27/28 0
1 Unit 2 ACI Injection Rate A-Feed 0 lb/min Collected during M23 run 1 0 2Unit 2 ACI Injection Rate A-Feed 0 lb/min Collected during M23 run 2 0 3 Unit 2 ACI Injection Rate A-Feed 0 lb/min Collected during M23 run 3 0 4Unit 2 ACI Injection Rate A-Feed 0.9 lb/min Collected during run 1 of M29 and OTM27/28 0
5 Unit 2 ACI Injection Rate A-Feed 0.85 lb/min Collected during run 2 of M29 and OTM27/28 0
6Unit 2 ACI Injection Rate A-Feed 0.86 lb/min Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 ACI Injection Rate B-Feed 0.04 lb/min Collected during M23 run 1 0 2Unit 1 ACI Injection Rate B-Feed 0.15 lb/min Collected during M23 run 2 0 3 Unit 1 ACI Injection Rate B-Feed 0.07 lb/min Collected during M23 run 3 0 4Unit 1 ACI Injection Rate B-Feed 0.38 lb/min Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 ACI Injection Rate B-Feed 0.37 lb/min Collected during run 2 of M29 and OTM27/28 0
Tuesday, February 15, 2011 Page 62 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 6Unit 1 ACI Injection Rate B-Feed 0.35 lb/min Collected during run 3 of M29 and OTM27/28 0
1 Unit 2 ACI Injection Rate B-Feed 0.51 lb/min Collected during M23 run 1 0 2Unit 2 ACI Injection Rate B-Feed 0.51 lb/min Collected during M23 run 2 0 3 Unit 2 ACI Injection Rate B-Feed 0.5 lb/min Collected during M23 run 3 0 4Unit 2 ACI Injection Rate B-Feed 0 lb/min Collected during run 1 of M29 and OTM27/28 0
5 Unit 2 ACI Injection Rate B-Feed 0 lb/min Collected during run 2 of M29 and OTM27/28 0
6Unit 2 ACI Injection Rate B-Feed 0 lb/min Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 BH Flue Gas Flow 0.3 macfm Collected during M23 run 1 0 2Unit 1 BH Flue Gas Flow 0.3 macfm Collected during M23 run 2 0 3 Unit 1 BH Flue Gas Flow 0.3 macfm Collected during M23 run 3 0 4Unit 1 BH Flue Gas Flow 0.39 macfm Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 BH Flue Gas Flow 0.38 macfm Collected during run 2 of M29 and OTM27/28 0
6Unit 1 BH Flue Gas Flow 0.38 macfm Collected during run 3 of M29 and OTM27/28 0
1 Unit 2 BH Flue Gas Flow 0.64 macfm Collected during M23 run 1 0 2Unit 2 BH Flue Gas Flow 0.63 macfm Collected during M23 run 2 0 3 Unit 2 BH Flue Gas Flow 0.63 macfm Collected during M23 run 3 0 4Unit 2 BH Flue Gas Flow 0.92 macfm Collected during run 1 of M29 and OTM27/28 0
5 Unit 2 BH Flue Gas Flow 0.87 macfm Collected during run 2 of M29 and OTM27/28 0
6Unit 2 BH Flue Gas Flow 0.88 macfm Collected during run 3 of M29 and OTM27/28 0
Tuesday, February 15, 2011 Page 63 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 1 Unit 1 ACI Rate to System 0.55 lb/macf Collected during M23 run 1 0 2Unit 1 ACI Rate to System 0.48 lb/macf Collected during M23 run 2 0 3 Unit 1 ACI Rate to System 0.44 lb/macf Collected during M23 run 3 0 4Unit 1 ACI Rate to System 0.98 lb/macf Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 ACI Rate to System 0.97 lb/macf Collected during run 2 of M29 and OTM27/28 0
6Unit 1 ACI Rate to System 0.93 lb/macf Collected during run 3 of M29 and OTM27/28 0
1 Unit 2 ACI Rate to System 0.8 lb/macf Collected during M23 run 1 0 2Unit 2 ACI Rate to System 0.8 lb/macf Collected during M23 run 2 0 3 Unit 2 ACI Rate to System 0.79 lb/macf Collected during M23 run 3 0 4Unit 2 ACI Rate to System 0.97 lb/macf Collected during run 1 of M29 and OTM27/28 0
5 Unit 2 ACI Rate to System 0.98 lb/macf Collected during run 2 of M29 and OTM27/28 0
6Unit 2 ACI Rate to System 0.98 lb/macf Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 & 2 Combined StackFlow Rate 0 scfh NOT Collected during M23 run 1 0 2Unit 1 & 2 Combined StackFlow Rate 0 scfh NOT Collected during M23 run 2 0 3 Unit 1 & 2 Combined StackFlow Rate 0 scfh NOT Collected during M23 run 3 0 4Unit 1 & 2 Combined StackFlow Rate 5E+07 scfh Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 & 2 Combined StackFlow Rate 5E+07 scfh Collected during run 2 of M29 and OTM27/28 0
6Unit 1 & 2 Combined StackFlow Rate 5E+07 scfh Collected during run 3 of M29 and OTM27/28 0
1 Unit 1 & 2 Combined Flue Gas CO2 0 % NOT collected during M23 run 1 0
Tuesday, February 15, 2011 Page 64 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010

APCD Run Data

Process Lab Run Data 2Unit 1 & 2 Combined Flue Gas CO2 0 % NOT Collected during M23 run 2 0 3 Unit 1 & 2 Combined Flue Gas CO2 0 % NOT Collected during M23 run 3 0 4Unit 1 & 2 Combined Flue Gas CO2 12.8 % Collected during run 1 of M29 and OTM27/28 0
5 Unit 1 & 2 Combined Flue Gas CO2 13.3 % Collected during run 2 of M29 and OTM27/28 0
6Unit 1 & 2 Combined Flue Gas CO2 13 % Collected during run 3 of M29 and OTM27/28 0

Run Name Value UOM Comments Target Value 1 ELECTROSTATIC PRECIPITATOR 0 0 1 ACTIVATED CARBON ADSORPTION 0 0 1 BAGHOUSE 0 0

Tuesday, February 15, 2011 Page 65 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 Sampling / Stack Data Results Detail LocationStack Exit - Method 23 Average Run Number 1 2 3 Test Date 4/13/2010 4/14/2010 4/15/2010 Run Start Time 8:20:00 AM8:40:00 AM7:35:00 AM Run Finish Time 4:41:00 PM5:12:00 PM3:54:00 PM Net Traversing Points 96 96 96 Net Run Time, minutes 480 480 480 Nozzle Diameter, inches 0.189 0.189 0.189 0.189 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.9821 0.9821 0.9821 0.982 Barometric Pressure, inches of Mercury 29.55 29.7 29.55 29.600 Average Orifice Meter Differential, inches H2O 1.12 1.06 1.04 1.073 Dry Gas Meter Volume Sampled, cubic feet 291.128 281.377 277.464 283.323 Average Dry Gas Meter Temperature, °F 82.14 77.58 76.76 78.827 Dry Gas Meter Volume Sampled, dscf 275.783 270.127 265.420 270.443 Total Moisture Liquid collected, g 713.3 750.7 690.1 718.033 Volume of Water Vapor, standard cubic feet 33.58 35.34 32.48 33.800 Moisture Content of Stack Gas, % 10.85 11.57 10.90 11.107 Moisture Saturation at Stack Gas Temperature, % 100.00 100.00 100.00 100.000 Dry Mole Fraction 0.8915 0.8843 0.891 0.889 Carbon Dioxide, % 12.6 12.8 12.9 12.767 Oxygen, % 6.8 6.6 6.5 6.633 Carbon Monoxide & Nitrogen, % 80.6 80.6 80.6 80.600 Fuel Factor 1.12 1.12 1.12 Dry Molecular Weight, lb/lb-Mole 30.29 30.31 30.32 30.307 Wet Molecular weight, lb/lb-Mole 28.96 28.89 28.98 28.943 Flue Gas Static Pressure, inches of H2O -0.85 -0.65 -0.76 -0.753 Absolute Flue Gas Pressure, inches of Mercury 29.49 29.65 29.49 29.543 Average Stack Gas Temperature, °F 330.21 331.61 330.80 330.873 Average Velocity Head, inches of H2O 1.4696564527 73231.402869590

582791.371137832

87722 1.415 Average Stack Gas Velocity, feet/second 83.74 81.77 80.89 82.133 Stack Cross-Sectional Area, square feet 215.990 215.990 215.990 215.990 Dry Volumetric Flow Rate, dry scfm 637,153.1 619,390.1 614,664.1623,735.767 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,085,220.21,059,690.1 1,048,285.91,064,398.7 33 Percent Isokinetic of Sampling Rate, % 100.0 100.7 99.7 100.133 Percent Excess Air, % 47.0 45.0 44.0 45.333 F-Factor, dscfm/MMBtu @ %O2 9721 9649 96359,668.333 Round Duct Diameter, inches 199 199 199 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

Tuesday, February 15, 2011 Page 66 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 9/3/2010 LocationStack Exit - Method 29 Average Run Number Test Date Run Start Time Run Finish Time Net Traversing Points Net Run Time, minutes Nozzle Diameter, inches Pitot Tube Coefficient Dry Gas Meter Calibration Factor Barometric Pressure, inches of Mercury Average Orifice Meter Differential, inches H2O Dry Gas Meter Volume Sampled, cubic feet Average Dry Gas Meter Temperature, °F Dry Gas Meter Volume Sampled, dscf Total Moisture Liquid collected, g Volume of Water Vapor, standard cubic feet Moisture Content of Stack Gas, % Moisture Saturation at Stack Gas Temperature, % Dry Mole Fraction Carbon Dioxide, % Oxygen, % Carbon Monoxide & Nitrogen, % Fuel Factor Dry Molecular Weight, lb/lb-Mole Wet Molecular weight, lb/lb-Mole Flue Gas Static Pressure, inches of H2O Absolute Flue Gas Pressure, inches of Mercury Average Stack Gas Temperature, °F Average Velocity Head, inches of H2O Average Stack Gas Velocity, feet/second Stack Cross-Sectional Area, square feet Dry Volumetric Flow Rate, dry scfm Actual Wet Volumetric Flue Gas Flow Rate, acfm Percent Isokinetic of Sampling Rate, % Percent Excess Air, % F-Factor, dscfm/MMBtu @ %O2 Round Duct Diameter, inches Rectangular Duct Width, inches Rectangular Duct Length, inches Fw Fc

Tuesday, February 15, 2011 Page 67 of 68Utility Boiler MACT ICR - Hennepin Power Station Units 1 & 2 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

Tuesday, February 15, 2011 Page 68 of 68