## APPENDIX I ERT REPORTS

### Century Aluminum - ICR Testing
5/28/2013 Facility Information: Century Aluminum of Kentucky
1627 State Route North

Hawesville Ky42348 Contact:Jamie Coomes Phone:270-852-2818 Fax: Email: jcoomes@centuryky.com Testing Company: GEL Engineering, LLC 2040 Savage Road

Charleston SC29417 Contact:Craig McKenzie Phone:843-769-7378 Fax: Email:cam2@gel.com

Air Permit Number: V-08-012 Potline 1-4 Main Stack EP84 Permitted Maximum Process Rate: 66,000 tons of aluminum Max. Normal Operation Process Rate: 66,000 tons of aluminum Target Process Test Rat 56,000 tons of aluminum

Description of the source (including control equipment). Please see the attachments for source or process flow diagram: NA. Previously submitted. Industry/SCC/NAIS

Sampling Location Information:

Test Parameter Information: AFS #:29-091-0004 FRS #:

SCC / Description30304001 Industrial Processes - Primary Metal Production - Alumina Processing - Bayer Process - Bayer Process

The following state and federal regulations that apply to the proposed testing: Permitted Source ID/Name:

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 Line 4 Stack311.75 3177 1558 4 12 Line 4 Downcomer 14 28 14 2 12

Line 4 Downcomer-B 14 28 14 2 12

Line 4 Stack-B311.75 3177 1558 4 12

Target Parameter Test Method Number of

Test Runs Test Run

Duration Comments Location Filterable Particulate Method 17 3 240 Line 4 Downcomer



### Page 2 of 53

### Century Aluminum - ICR Testing
5/28/2013

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.
NA Beryllium Method 29 3 240 Line 4 Downcomer Cobalt Method 29 3 240 Line 4 Downcomer Selenium Method 29 3 240 Line 4 Downcomer Chromium Method 29 3 240 Line 4 Downcomer Cadmium Method 29 3 240 Line 4 Downcomer Nickel Method 29 3 240 Line 4 Downcomer Lead Method 29 3 240 Line 4 Downcomer Arsenic Method 29 3 240 Line 4 Downcomer Antimony Method 29 3 240 Line 4 Downcomer Mercury Method 29 3 240 Line 4 Downcomer Manganese Method 29 3 240 Line 4 Downcomer Particulate Matter (PM) Method 315 3 240 Line 4 Downcomer Methylene Chloride

Extractable Matter (MCEM) Method 315 3 240 Line 4 Downcomer Filterable Particulate Method 17 3 240 Line 4 Downcomer-BParticulate Matter (PM) Method 315 3 180 Line 4 Downcomer-BMethylene Chloride

Extractable Matter (MCEM) Method 315 3 180 Line 4 Downcomer-BCobalt Method 29 3 240 Line 4 StackArsenic Method 29 3 240 Line 4 StackSelenium Method 29 3 240 Line 4 StackChromium Method 29 3 240 Line 4 StackBeryllium Method 29 3 240 Line 4 StackAntimony Method 29 3 240 Line 4 StackMercury Method 29 3 240 Line 4 StackMagnesium Method 29 3 240 Line 4 StackLead Method 29 3 240 Line 4 StackNickel Method 29 3 240 Line 4 StackCadmium Method 29 3 240 Line 4 StackMethylene Chloride

Extractable Matter (MCEM) Method 315 3 180 Line 4 Stack
Particulate Matter (PM) Method 315 3 180 Line 4 StackMethylene Chloride

Extractable Matter (MCEM) Method 315 3 180 Line 4 Stack-B
Particulate Matter (PM) Method 315 3 180 Line 4 Stack-B



### Page 3 of 53

### Century Aluminum - ICR Testing
5/28/2013



### Page 4 of 53

### Century Aluminum - ICR Testing
5/28/2013 Sampling / Stack Data Results Summary

LocationLine 4 Downcomer - Method 17 Average Run Number 1 2 3
Test Date 5/7/2013 5/7/2013 5/8/2013 Run Start Time 5:30:00 PM 12:05:00 AM 2:00:00 AM

Run Finish Time 9:10:00 PM 11:45:00 PM 5:40:00 AM

Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 166.15 163.90 167.10 165.717 Moisture Content of Stack Gas, % 1.49 1.41 1.54 1.480 Moisture Saturation at Stack Gas Temperature, % 3.77 2.91 2.45 3.043 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 82.58 74.67 69.58 75.610 Dry Volumetric Flow Rate, dry scfm 892.0 881.1 896.8 889.967 Actual Wet Volumetric Flue Gas Flow Rate, acfm 935.2 910.8 918.5 921.500 Percent Isokinetic of Sampling Rate, % 100.0 99.9 100.0 99.967 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 5 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Downcomer - Method 29 Average Run Number 1 2 3
Test Date 3/12/2013 3/12/2013 3/13/2013 Run Start Time 7:00:00 PM 2:20:00 AM 2:40:00 AM

Run Finish Time 10:30:00 PM 1/1/1900 2:10:00 AM 6:10:00 AM

Net Run Time, minutes 220 220 220 Dry Gas Meter Volume Sampled, dscf 148.99 147.14 151.32 149.150 Moisture Content of Stack Gas, % 0.35 0.35 0.38 0.360 Moisture Saturation at Stack Gas Temperature, % 1.33 1.21 0.96 1.167 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 52.45 49.82 43.82 48.697 Dry Volumetric Flow Rate, dry scfm 757.0 751.0 771.0 759.667 Actual Wet Volumetric Flue Gas Flow Rate, acfm 738.3 728.6 739.5 735.467 Percent Isokinetic of Sampling Rate, % 94.8 94.4 94.6 94.600 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 6 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Downcomer - Method 315 Average Run Number 1 2 3
Test Date 3/12/2013 3/12/2013 3/13/2013 Run Start Time 7:00:00 PM 12:24:00 AM12:45:00 AM

Run Finish Time 9:30:00 PM 1/1/1900 12:05:00 AM 3:15:00 AM

Net Run Time, minutes 150 150 150 Dry Gas Meter Volume Sampled, dscf 109.12 107.68 109.19 108.663 Moisture Content of Stack Gas, % 0.35 0.33 0.29 0.323 Moisture Saturation at Stack Gas Temperature, % 1.34 1.21 1.16 1.237 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 52.60 49.90 48.70 50.400 Dry Volumetric Flow Rate, dry scfm 764.0 753.0 771.6 762.867 Actual Wet Volumetric Flue Gas Flow Rate, acfm 745.3 730.6 746.6 740.833 Percent Isokinetic of Sampling Rate, % 100.9 101.1 100.0 100.667 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 7 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Downcomer-B - Method 17 Average Run Number 4 5 6
Test Date 5/8/2013 5/8/2013 5/9/2013 Run Start Time 4:45:00 PM 12:00:00 AM 1:15:00 AM

Run Finish Time 8:25:00 PM 11:40:00 PM 4:35:00 AM

Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 163.72 162.29 165.50 163.837 Moisture Content of Stack Gas, % 1.18 1.17 1.26 1.203 Moisture Saturation at Stack Gas Temperature, % 4.99 3.27 2.67 3.643 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 91.42 78.08 72.00 80.500 Dry Volumetric Flow Rate, dry scfm 882.2 873.2 889.2 881.533 Actual Wet Volumetric Flue Gas Flow Rate, acfm 936.4 909.5 916.6 920.833 Percent Isokinetic of Sampling Rate, % 99.6 99.8 99.9 99.767 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 8 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Downcomer-B - Method 315 Average Run Number 1 2 3
Test Date 3/13/2013 3/13/2013 3/14/2013 Run Start Time 7:15:00 PM 12:00:00 AM12:45:00 AM

Run Finish Time 9:45:00 PM 11:45:00 PM 3:15:00 AM

Net Run Time, minutes 150 150 150 Dry Gas Meter Volume Sampled, dscf 112.03 107.08 107.91 109.007 Moisture Content of Stack Gas, % 0.28 0.30 0.31 0.297 Moisture Saturation at Stack Gas Temperature, % 0.75 0.74 0.77 0.753 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 37.30 37.00 38.10 37.467 Dry Volumetric Flow Rate, dry scfm 792.8 762.0 770.4 775.067 Actual Wet Volumetric Flue Gas Flow Rate, acfm 751.1 721.6 731.2 734.633 Percent Isokinetic of Sampling Rate, % 99.9 99.3 99.0 99.400 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 9 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Stack - Method 29 Average Run Number 1 2 3
Test Date 3/12/2013 3/12/2013 3/12/2013 Run Start Time 8:30:00 AM 12:10:00 PM 3:50:00 PM

Run Finish Time 12:15:00 PM3:50:00 PM 7:40:00 PM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 159.50 166.52 159.40 161.807 Moisture Content of Stack Gas, % 2.27 3.01 3.39 2.890 Moisture Saturation at Stack Gas Temperature, % 3.19 3.41 3.43 3.343 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 76.92 79.00 79.17 78.363 Dry Volumetric Flow Rate, dry scfm 1,330,962.51,321,718.1 1,338,923.51,330,534.70 0 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,414,672.21,420,079.0 1,446,158.81,426,970.00 0 Percent Isokinetic of Sampling Rate, % 91.7 96.4 91.1 93.067 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 10 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Stack - Method 315 Average Run Number 1 2 3
Test Date 3/13/2013 3/13/2013 3/13/2013 Run Start Time 9:05:00 AM 12:20:00 PM 3:35:00 PM

Run Finish Time 12:05:00 PM3:20:00 PM 6:35:00 PM Net Run Time, minutes 180 180 180 Dry Gas Meter Volume Sampled, dscf 137.82 133.19 131.86 134.290 Moisture Content of Stack Gas, % 2.55 2.46 2.89 2.633 Moisture Saturation at Stack Gas Temperature, % 2.83 2.95 2.92 2.900 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 73.75 74.92 74.67 74.447 Dry Volumetric Flow Rate, dry scfm 1,392,206.11,387,660.3 1,368,012.71,382,626.36 7 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,455,382.21,454,428.0 1,437,571.51,449,127.23 3 Percent Isokinetic of Sampling Rate, % 101.0 98.0 98.4 99.133 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 11 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Stack-B - Method 315 Average Run Number 1 3 5
Test Date 3/14/2013 3/14/2013 3/14/2013 Run Start Time 8:00:00 AM2:30:00 PM11:15:00 AM Run Finish Time 11:00:00 AM5:30:00 PM 2:15:00 PM Net Run Time, minutes 180 180 180 Dry Gas Meter Volume Sampled, dscf 132.43 133.88 131.06 132.457 Moisture Content of Stack Gas, % 2.83 2.27 2.51 2.537 Moisture Saturation at Stack Gas Temperature, % 2.80 3.07 3.06 2.977 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 73.42 76.17 76.08 75.223 Dry Volumetric Flow Rate, dry scfm 1,373,672.61,397,873.5 1,362,751.51,378,099.20 0 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,440,752.01,466,195.7 1,433,118.91,446,688.86 7 Percent Isokinetic of Sampling Rate, % 98.4 97.8 98.2 98.133 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 12 of 53

### Century Aluminum - ICR Testing
5/28/2013 Emissions Summary

Location: Line 4 Downcomer - Method 17 Compound: Filterable Particulate Average ProcRunID RunNumber 1 2 3 Mass_mg 22.928 13.498 16.685 1.77E+01 Elb/hr 1.63E-02 9.60E-03 1.18E-02 1.26E-02 gr/dscf 2.13E-03 1.27E-03 1.54E-03 1.65E-03



### Location: Line 4 Downcomer - Method 29 Compound: Antimony Average ProcRunID RunNumber 1 2 3 Mass_mg 0.0002 0.000387 0.000355 3.14E-04 Elb/hr 1.34E-07 2.61E-07 2.39E-07 2.11E-07 gr/dscf 2.07E-08 4.06E-08 3.62E-08 3.25E-08 mg/dscm 4.74E-05 9.29E-05 8.29E-05 7.44E-05 

### Compound: Arsenic Average ProcRunID RunNumber 1 2 3 Mass_mg 0.000569 0.000529 0.000681 5.93E-04 Elb/hr 3.82E-07 3.57E-07 4.59E-07 3.99E-07 gr/dscf 5.89E-08 5.55E-08 6.95E-08 6.13E-08 mg/dscm 1.35E-04 1.27E-04 1.59E-04 1.40E-04 

### Compound: Beryllium Average ProcRunID RunNumber 1 2 3 Mass_mg 0.000804 0.000742 0.00102 8.55E-04 Elb/hr 5.40E-07 5.01E-07 6.87E-07 5.76E-07 gr/dscf 8.33E-08 7.78E-08 1.04E-07 8.84E-08 mg/dscm 1.91E-04 1.78E-04 2.38E-04 2.02E-04 

### Compound: Cadmium Average ProcRunID RunNumber 1 2 3 Mass_mg 0.000242 0.000232 0.000338 2.71E-04 Elb/hr 1.63E-07 1.57E-07 2.28E-07 1.83E-07 gr/dscf 2.51E-08 2.43E-08 3.45E-08 2.80E-08 mg/dscm 5.74E-05 5.57E-05 7.89E-05 6.40E-05 

### Compound: Chromium Average ProcRunID



### Page 13 of 53

### Century Aluminum - ICR Testing
5/28/2013
RunNumber 1 2 3 Mass_mg 0.0049 0.00531 0.00869 6.30E-03 Elb/hr 3.29E-06 3.59E-06 5.86E-06 4.25E-06 gr/dscf 5.08E-07 5.57E-07 8.86E-07 6.50E-07 mg/dscm 1.16E-03 1.27E-03 2.03E-03 1.49E-03 

### Compound: Cobalt Average ProcRunID RunNumber 1 2 3 Mass_mg 0.00197 0.0013 0.0011 1.46E-03 Elb/hr 1.32E-06 8.78E-07 7.41E-07 9.80E-07 gr/dscf 2.04E-07 1.36E-07 1.12E-07 1.51E-07 mg/dscm 4.67E-04 3.12E-04 2.57E-04 3.45E-04 

### Compound: Lead Average ProcRunID RunNumber 1 2 3 Mass_mg 0.00332 0.00378 0.00533 4.14E-03 Elb/hr 2.23E-06 2.55E-06 3.59E-06 2.79E-06 gr/dscf 3.44E-07 3.96E-07 5.44E-07 4.28E-07 mg/dscm 7.87E-04 9.07E-04 1.24E-03 9.78E-04 

### Compound: Manganese Average ProcRunID RunNumber 1 2 3 Mass_mg 0.0347 0.0165 0.0118 2.10E-02 Elb/hr 2.33E-05 1.11E-05 7.95E-06 1.41E-05 gr/dscf 3.59E-06 1.73E-06 1.20E-06 2.17E-06 mg/dscm 8.23E-03 3.96E-03 2.75E-03 4.98E-03 

### Compound: Mercury Average ProcRunID RunNumber 1 2 3 Mass_mg 0.0005 0.0005 0.0005 5.00E-04 Elb/hr 3.36E-07 3.38E-07 3.37E-07 3.37E-07 gr/dscf 5.18E-08 5.24E-08 5.10E-08 5.17E-08 mg/dscm 1.19E-04 1.20E-04 1.17E-04 1.19E-04 

### Compound: Nickel Average ProcRunID RunNumber 1 2 3 Mass_mg 0.0965 0.0556 0.044 6.54E-02 Elb/hr 6.49E-05 3.75E-05 2.97E-05 4.40E-05 gr/dscf 1.00E-05 5.83E-06 4.49E-06 6.77E-06 mg/dscm 2.29E-02 1.33E-02 1.03E-02 1.55E-02



### Page 14 of 53

### Century Aluminum - ICR Testing
5/28/2013 Compound: Selenium Average ProcRunID RunNumber 1 2 3 Mass_mg 0.000269 0.000329 0.0002 2.66E-04 Elb/hr 1.81E-07 2.22E-07 1.35E-07 1.79E-07 gr/dscf 2.79E-08 3.45E-08 2.04E-08 2.76E-08 mg/dscm 6.38E-05 7.90E-05 4.67E-05 6.32E-05



### Location: Line 4 Downcomer - Method 315 Compound: Methylene Chloride Extractable Mat Average ProcRunID RunNumber 1 2 3 Mass_mg 3 3.4 2 2.80E+00 Elb/hr 2.78E-03 3.15E-03 1.87E-03 2.60E-03 gr/dscf 4.24E-04 4.87E-04 2.83E-04 3.98E-04 mg/dscm 9.71E-01 1.12E+00 6.47E-01 9.13E-01 

### Compound: Particulate Matter (PM) Average ProcRunID RunNumber 1 2 3 Mass_mg 10.7 8.4 8.1 9.07E+00 Elb/hr 9.91E-03 7.77E-03 7.57E-03 8.42E-03 gr/dscf 1.51E-03 1.20E-03 1.14E-03 1.28E-03 mg/dscm 3.46E+00 2.76E+00 2.62E+00 2.95E+00



### Location: Line 4 Downcomer-B - Method 17 Compound: Filterable Particulate Average ProcRunID RunNumber 4 5 6 Mass_mg 9.709 5.615 16.461 1.06E+01 Elb/hr 6.92E-03 4.00E-03 1.17E-02 7.54E-03 gr/dscf 9.15E-04 5.34E-04 1.53E-03 9.93E-04



### Location: Line 4 Downcomer-B - Method 315 Compound: Methylene Chloride Extractable Mat Average ProcRunID RunNumber 1 2 3 Mass_mg 3.2 1.4 1.7 2.10E+00 Elb/hr 3.00E-03 1.32E-03 1.61E-03 1.98E-03 gr/dscf 4.41E-04 2.02E-04 2.43E-04 2.95E-04 mg/dscm 1.01E+00 4.62E-01 5.56E-01 6.76E-01 

### Compound: Particulate Matter (PM) Average ProcRunID



### Page 15 of 53

### Century Aluminum - ICR Testing
5/28/2013
RunNumber 1 2 3 Mass_mg 6.8 7.7 10 8.17E+00 Elb/hr 6.37E-03 7.25E-03 9.44E-03 7.69E-03 gr/dscf 9.37E-04 1.11E-03 1.43E-03 1.16E-03 mg/dscm 2.14E+00 2.54E+00 3.27E+00 2.65E+00



### Location: Line 4 Stack - Method 29 Compound: Antimony Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00216 0.000894 0.000949 1.33E-03 Elb/hr 2.38E-03 9.39E-04 1.05E-03 1.46E-03 gr/dscf 2.09E-07 8.29E-08 9.19E-08 1.28E-07 mg/dscm 4.78E-04 1.90E-04 2.10E-04 2.93E-04 

### Compound: Arsenic Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00433 0.00494 0.00419 4.49E-03 Elb/hr 4.78E-03 5.19E-03 4.66E-03 4.88E-03 gr/dscf 4.19E-07 4.58E-07 4.06E-07 4.28E-07 mg/dscm 9.59E-04 1.05E-03 9.28E-04 9.79E-04 

### Compound: Beryllium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00684 0.00736 0.00551 6.57E-03 Elb/hr 7.55E-03 7.73E-03 6.12E-03 7.13E-03 gr/dscf 6.62E-07 6.82E-07 5.33E-07 6.26E-07 mg/dscm 1.51E-03 1.56E-03 1.22E-03 1.43E-03 

### Compound: Cadmium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00167 0.00172 0.00106 1.48E-03 Elb/hr 1.84E-03 1.81E-03 1.18E-03 1.61E-03 gr/dscf 1.62E-07 1.59E-07 1.03E-07 1.41E-07 mg/dscm 3.70E-04 3.65E-04 2.35E-04 3.23E-04 

### Compound: Chromium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0122 0.0149 0.0048 1.06E-02 Elb/hr 1.35E-02 1.56E-02 5.33E-03 1.15E-02 gr/dscf 1.18E-06 1.38E-06 4.65E-07 1.01E-06 mg/dscm 2.70E-03 3.16E-03 1.06E-03 2.31E-03



### Page 16 of 53

### Century Aluminum - ICR Testing
5/28/2013 Compound: Cobalt Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00182 0.00157 0.000849 1.41E-03 Elb/hr 2.01E-03 1.65E-03 9.43E-04 1.53E-03 gr/dscf 1.76E-07 1.46E-07 8.22E-08 1.35E-07 mg/dscm 4.03E-04 3.33E-04 1.88E-04 3.08E-04 

### Compound: Lead Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0221 0.0241 0.0203 2.22E-02 Elb/hr 2.44E-02 2.53E-02 2.26E-02 2.41E-02 gr/dscf 2.14E-06 2.23E-06 1.97E-06 2.11E-06 mg/dscm 4.89E-03 5.11E-03 4.50E-03 4.83E-03 

### Compound: Magnesium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0144 0.0127 0.00971 1.23E-02 Elb/hr 1.59E-02 1.33E-02 1.08E-02 1.33E-02 gr/dscf 1.39E-06 1.18E-06 9.40E-07 1.17E-06 mg/dscm 3.19E-03 2.69E-03 2.15E-03 2.68E-03 

### Compound: Mercury Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0005 0.0006 0.000706 6.02E-04 Elb/hr 5.52E-04 6.30E-04 7.84E-04 6.55E-04 gr/dscf 4.84E-08 5.56E-08 6.84E-08 5.75E-08 mg/dscm 1.11E-04 1.27E-04 1.56E-04 1.31E-04 

### Compound: Nickel Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0691 0.0418 0.0241 4.50E-02 Elb/hr 7.63E-02 4.39E-02 2.68E-02 4.90E-02 gr/dscf 6.69E-06 3.87E-06 2.33E-06 4.30E-06 mg/dscm 1.53E-02 8.87E-03 5.34E-03 9.84E-03 

### Compound: Selenium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.000683 0.000707 0.00177 1.05E-03 Elb/hr 7.54E-04 7.42E-04 1.97E-03 1.16E-03 gr/dscf 6.61E-08 6.55E-08 1.71E-07 1.01E-07


### Page 17 of 53

### Century Aluminum - ICR Testing
5/28/2013 mg/dscm 1.51E-04 1.50E-04 3.92E-04 2.31E-04



### Location: Line 4 Stack - Method 315 Compound: Methylene Chloride Extractable Mat Average ProcRunID RunNumber 1 2 3 Mass_mg 4.1 2.8 2.1 3.00E+00 Elb/hr 5.48E+00 3.86E+00 2.88E+00 4.07E+00 gr/dscf 4.59E-04 3.24E-04 2.46E-04 3.43E-04 mg/dscm 1.05E+00 7.43E-01 5.63E-01 7.85E-01 

### Compound: Particulate Matter (PM) Average ProcRunID RunNumber 1 2 3 Mass_mg 93.3 86.2 157.3 1.12E+02 Elb/hr 1.25E+02 1.19E+02 2.16E+02 1.53E+02 gr/dscf 1.04E-02 9.99E-03 1.84E-02 1.29E-02 mg/dscm 2.39E+01 2.29E+01 4.21E+01 2.96E+01



### Location: Line 4 Stack-B - Method 315 Compound: Methylene Chloride Extractable Mat Average ProcRunID RunNumber 1 5 3 Mass_mg 4.5 1.1 2.9 2.83E+00 Elb/hr 6.17E+00 1.51E+00 4.01E+00 3.90E+00 gr/dscf 5.24E-04 1.30E-04 3.34E-04 3.29E-04 mg/dscm 1.20E+00 2.96E-01 7.65E-01 7.54E-01 

### Compound: Particulate Matter (PM) Average ProcRunID RunNumber 1 5 3 Mass_mg 113.2 123.1 199.2 1.45E+02 Elb/hr 1.55E+02 1.69E+02 2.75E+02 2.00E+02 gr/dscf 1.32E-02 1.45E-02 2.30E-02 1.69E-02 mg/dscm 3.02E+01 3.32E+01 5.26E+01 3.87E+01



### Page 18 of 53

### Century Aluminum - ICR Testing
5/28/2013 Process Run Data

APCD Run Data

Process Lab Run Data Run Name Value UOM Comments Target Value 1Aluminum Produced 24.15 Tons/hr 0

Run Name Value UOM Comments Target Value 

### 1ELECTROSTATIC PRECIPITATOR - HIGH EFFICIENCY 0 0

Page 19 of 53

### Century Aluminum - ICR Testing
5/28/2013 Sampling / Stack Data Results Detail

LocationLine 4 Downcomer - Method 17 Average Run Number 1 2 3 Test Date 5/7/2013 5/7/2013 5/8/2013 Run Start Time 5:30:00 PM12:05:00 AM 2:00:00 AM Run Finish Time 9:10:00 PM11:45:00 PM 5:40:00 AM Net Traversing Points 12 84 108 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.39 0.39 0.39 0.390 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0062 1.0062 1.0062 1.006 Barometric Pressure, inches of Mercury 29.77 29.73 29.76 29.753 Average Orifice Meter Differential, inches H2O 1.58 1.53 1.58 1.563 Dry Gas Meter Volume Sampled, cubic feet 170.948 167.624 169.858 169.477 Average Dry Gas Meter Temperature, °F 86.00 81.92 79.25 82.390 Dry Gas Meter Volume Sampled, dscf 166.15 163.90 167.10 165.717 Total Moisture Liquid collected, g 53.4 49.9 55.5 52.933 Volume of Water Vapor, standard cubic feet 2.51 2.35 2.61 2.490 Moisture Content of Stack Gas, % 1.49 1.41 1.54 1.480 Moisture Saturation at Stack Gas Temperature, % 3.77 2.91 2.45 3.043 Dry Mole Fraction 0.9851 0.9859 0.9846 0.985 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.68 28.69 28.67 28.680 Flue Gas Static Pressure, inches of H2O -0.04 -0.04 -0.04 -0.040 Absolute Flue Gas Pressure, inches of Mercury 29.77 29.73 29.76 29.753 Average Stack Gas Temperature, °F 82.58 74.67 69.58 75.610 Average Velocity Head, inches of H2O 6.4903703492 0393E-026.235633857

12751E-020.0640730450

61705 0.064
Average Stack Gas Velocity, feet/second 14.58 14.20 14.32 14.367 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 892.0 881.1 896.8 889.967 Actual Wet Volumetric Flue Gas Flow Rate, acfm 935.2 910.8 918.5 921.500 Percent Isokinetic of Sampling Rate, % 100.0 99.9 100.0 99.967 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 20 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Downcomer - Method 29 Average Run Number 1 2 3 Test Date 3/12/2013 3/12/2013 3/13/2013 Run Start Time 7:00:00 PM2:20:00 AM 2:40:00 AM Run Finish Time 10:30:00 PM 1/1/1900 2:10:00 AM 6:10:00 AM
Net Traversing Points 12 12 12 Net Run Time, minutes 220 220 220 Nozzle Diameter, inches 0.43 0.43 0.43 0.430 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0102 1.0102 1.0102 1.010 Barometric Pressure, inches of Mercury 29.9 29.9 29.9 29.900 Average Orifice Meter Differential, inches H2O 1.66 1.63 1.71 1.667 Dry Gas Meter Volume Sampled, cubic feet 145.992 144.172 147.052 145.739 Average Dry Gas Meter Temperature, °F 64.45 64.36 60.18 62.997 Dry Gas Meter Volume Sampled, dscf 148.99 147.14 151.32 149.150 Total Moisture Liquid collected, g 11.2 10.9 12.1 11.400 Volume of Water Vapor, standard cubic feet 0.53 0.51 0.57 0.537 Moisture Content of Stack Gas, % 0.35 0.35 0.38 0.360 Moisture Saturation at Stack Gas Temperature, % 1.33 1.21 0.96 1.167 Dry Mole Fraction 0.9965 0.9965 0.9962 0.996 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.80 28.80 28.80 28.800 Flue Gas Static Pressure, inches of H2O -0.32 -0.32 -0.32 -0.320 Absolute Flue Gas Pressure, inches of Mercury 29.88 29.88 29.88 29.880 Average Stack Gas Temperature, °F 52.45 49.82 43.82 48.697 Average Velocity Head, inches of H2O 0.0431477585 519574.223623481

21617E-024.4069013614

5698E-02 0.043
Average Stack Gas Velocity, feet/second 11.51 11.36 11.53 11.467 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 757.0 751.0 771.0 759.667 Actual Wet Volumetric Flue Gas Flow Rate, acfm 738.3 728.6 739.5 735.467 Percent Isokinetic of Sampling Rate, % 94.8 94.4 94.6 94.600 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 21 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Downcomer - Method 315 Average Run Number 1 2 3 Test Date 3/12/2013 3/12/2013 3/13/2013 Run Start Time 7:00:00 PM12:24:00 AM12:45:00 AM Run Finish Time 9:30:00 PM 1/1/1900 12:05:00 AM 3:15:00 AM
Net Traversing Points 11 11 11 Net Run Time, minutes 150 150 150 Nozzle Diameter, inches 0.43 0.43 0.43 0.430 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0062 1.0062 1.0062 1.006 Barometric Pressure, inches of Mercury 29.9 29.9 29.9 29.900 Average Orifice Meter Differential, inches H2O 1.61 1.56 1.63 1.600 Dry Gas Meter Volume Sampled, cubic feet 107.263 106.232 107.153 106.883 Average Dry Gas Meter Temperature, °F 63.95 65.80 63.10 64.283 Dry Gas Meter Volume Sampled, dscf 109.12 107.68 109.19 108.663 Total Moisture Liquid collected, g 8 7.7 6.7 7.467 Volume of Water Vapor, standard cubic feet 0.38 0.36 0.32 0.353 Moisture Content of Stack Gas, % 0.35 0.33 0.29 0.323 Moisture Saturation at Stack Gas Temperature, % 1.34 1.21 1.16 1.237 Dry Mole Fraction 0.9965 0.9967 0.9971 0.997 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.80 28.80 28.81 28.803 Flue Gas Static Pressure, inches of H2O -0.32 -0.32 -0.32 -0.320 Absolute Flue Gas Pressure, inches of Mercury 29.88 29.88 29.88 29.880 Average Stack Gas Temperature, °F 52.60 49.90 48.70 50.400 Average Velocity Head, inches of H2O 4.3976450198 7817E-024.246320343

55964E-024.4486753236

8147E-02 0.044
Average Stack Gas Velocity, feet/second 11.62 11.39 11.64 11.550 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 764.0 753.0 771.6 762.867 Actual Wet Volumetric Flue Gas Flow Rate, acfm 745.3 730.6 746.6 740.833 Percent Isokinetic of Sampling Rate, % 100.9 101.1 100.0 100.667 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 22 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Downcomer-B - Method 17 Average Run Number 4 5 6 Test Date 5/8/2013 5/8/2013 5/9/2013 Run Start Time 4:45:00 PM12:00:00 AM 1:15:00 AM Run Finish Time 8:25:00 PM11:40:00 PM 4:35:00 AM Net Traversing Points 12 12 12 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.39 0.39 0.39 0.390 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0062 1.0062 1.0062 1.006 Barometric Pressure, inches of Mercury 29.79 29.62 29.62 29.677 Average Orifice Meter Differential, inches H2O 1.54 1.52 1.57 1.543 Dry Gas Meter Volume Sampled, cubic feet 169.182 169.094 171.280 169.852 Average Dry Gas Meter Temperature, °F 88.67 90.04 86.42 88.377 Dry Gas Meter Volume Sampled, dscf 163.72 162.29 165.50 163.837 Total Moisture Liquid collected, g 41.4 40.7 45.1 42.400 Volume of Water Vapor, standard cubic feet 1.95 1.92 2.12 1.997 Moisture Content of Stack Gas, % 1.18 1.17 1.26 1.203 Moisture Saturation at Stack Gas Temperature, % 4.99 3.27 2.67 3.643 Dry Mole Fraction 0.9882 0.9883 0.9874 0.988 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.71 28.71 28.70 28.707 Flue Gas Static Pressure, inches of H2O -0.04 -0.04 -0.04 -0.040 Absolute Flue Gas Pressure, inches of Mercury 29.79 29.62 29.62 29.677 Average Stack Gas Temperature, °F 91.42 78.08 72.00 80.500 Average Velocity Head, inches of H2O 6.4073045061 7049E-026.161316860

66885E-026.3247736437

3683E-02 0.063
Average Stack Gas Velocity, feet/second 14.60 14.18 14.29 14.357 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 882.2 873.2 889.2 881.533 Actual Wet Volumetric Flue Gas Flow Rate, acfm 936.4 909.5 916.6 920.833 Percent Isokinetic of Sampling Rate, % 99.6 99.8 99.9 99.767 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 23 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Downcomer-B - Method 315 Average Run Number 1 2 3 Test Date 3/13/2013 3/13/2013 3/14/2013 Run Start Time 7:15:00 PM12:00:00 AM12:45:00 AM Run Finish Time 9:45:00 PM11:45:00 PM 3:15:00 AM Net Traversing Points 11 11 11 Net Run Time, minutes 150 150 150 Nozzle Diameter, inches 0.43 0.43 0.43 0.430 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0062 1.0062 1.0062 1.006 Barometric Pressure, inches of Mercury 29.85 29.85 29.85 29.850 Average Orifice Meter Differential, inches H2O 1.67 1.57 1.60 1.613 Dry Gas Meter Volume Sampled, cubic feet 106.391 103.387 104.387 104.722 Average Dry Gas Meter Temperature, °F 45.45 53.75 54.75 51.317 Dry Gas Meter Volume Sampled, dscf 112.03 107.08 107.91 109.007 Total Moisture Liquid collected, g 6.5 6.8 7.2 6.833 Volume of Water Vapor, standard cubic feet 0.31 0.32 0.34 0.323 Moisture Content of Stack Gas, % 0.28 0.30 0.31 0.297 Moisture Saturation at Stack Gas Temperature, % 0.75 0.74 0.77 0.753 Dry Mole Fraction 0.9972 0.997 0.9969 0.997 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.81 28.81 28.81 28.810 Flue Gas Static Pressure, inches of H2O -0.3 -0.3 -0.3 -0.300 Absolute Flue Gas Pressure, inches of Mercury 29.83 29.83 29.83 29.830 Average Stack Gas Temperature, °F 37.30 37.00 38.10 37.467 Average Velocity Head, inches of H2O 4.5978932768 8082E-024.246320343

55964E-020.0434690908

85901 0.044
Average Stack Gas Velocity, feet/second 11.71 11.25 11.40 11.453 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 792.8 762.0 770.4 775.067 Actual Wet Volumetric Flue Gas Flow Rate, acfm 751.1 721.6 731.2 734.633 Percent Isokinetic of Sampling Rate, % 99.9 99.3 99.0 99.400 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 24 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Stack - Method 29 Average Run Number 1 2 3 Test Date 3/12/2013 3/12/2013 3/12/2013 Run Start Time 8:30:00 AM12:10:00 PM 3:50:00 PM Run Finish Time 12:15:00 PM3:50:00 PM 7:40:00 PM Net Traversing Points 12 12 12 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.23 0.23 0.23 0.230 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.9968 0.9968 0.9968 0.997 Barometric Pressure, inches of Mercury 29.25 29.27 29.24 29.253 Average Orifice Meter Differential, inches H2O 1.71 1.73 1.75 1.730 Dry Gas Meter Volume Sampled, cubic feet 160.247 168.572 160.623 163.147 Average Dry Gas Meter Temperature, °F 59.17 63.50 60.58 61.083 Dry Gas Meter Volume Sampled, dscf 159.50 166.52 159.40 161.807 Total Moisture Liquid collected, g 78.8 109.9 118.7 102.467 Volume of Water Vapor, standard cubic feet 3.71 5.17 5.59 4.823 Moisture Content of Stack Gas, % 2.27 3.01 3.39 2.890 Moisture Saturation at Stack Gas Temperature, % 3.19 3.41 3.43 3.343 Dry Mole Fraction 0.9773 0.9699 0.9661 0.971 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.59 28.51 28.47 28.523 Flue Gas Static Pressure, inches of H2O 0.55 0.53 0.56 0.547 Absolute Flue Gas Pressure, inches of Mercury 29.29 29.31 29.28 29.293 Average Stack Gas Temperature, °F 76.92 79.00 79.17 78.363 Average Velocity Head, inches of H2O 0.5984104119 598390.599281687

9451340.6197981368

7384 0.606
Average Stack Gas Velocity, feet/second 44.48 44.65 45.47 44.867 Stack Cross-Sectional Area, square feet 530.078 530.078 530.078 530.078 Dry Volumetric Flow Rate, dry scfm 1,330,962.5 1,321,718.1 1,338,923.51,330,534.7 00 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,414,672.2 1,420,079.0 1,446,158.81,426,970.0 00 Percent Isokinetic of Sampling Rate, % 91.7 96.4 91.1 93.067 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 311.75 311.75 311.75 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 25 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Stack - Method 315 Average Run Number 1 2 3 Test Date 3/13/2013 3/13/2013 3/13/2013 Run Start Time 9:05:00 AM12:20:00 PM 3:35:00 PM Run Finish Time 12:05:00 PM3:20:00 PM 6:35:00 PM Net Traversing Points 12 12 12 Net Run Time, minutes 180 180 180 Nozzle Diameter, inches 0.23 0.23 0.23 0.230 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.9968 0.9968 0.9968 0.997 Barometric Pressure, inches of Mercury 29.65 29.61 29.65 29.637 Average Orifice Meter Differential, inches H2O 1.75 1.76 1.72 1.743 Dry Gas Meter Volume Sampled, cubic feet 132.835 130.225 128.174 130.411 Average Dry Gas Meter Temperature, °F 44.88 51.50 49.17 48.517 Dry Gas Meter Volume Sampled, dscf 137.82 133.19 131.86 134.290 Total Moisture Liquid collected, g 76.7 71.583.499999999 9999 77.233
Volume of Water Vapor, standard cubic feet 3.61 3.36 3.93 3.633 Moisture Content of Stack Gas, % 2.55 2.46 2.89 2.633 Moisture Saturation at Stack Gas Temperature, % 2.83 2.95 2.92 2.900 Dry Mole Fraction 0.9745 0.9754 0.9711 0.974 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.56 28.57 28.53 28.553 Flue Gas Static Pressure, inches of H2O 0.56 0.56 0.53 0.550 Absolute Flue Gas Pressure, inches of Mercury 29.69 29.65 29.69 29.677 Average Stack Gas Temperature, °F 73.75 74.92 74.67 74.447 Average Velocity Head, inches of H2O 0.6450726075 549760.642176507

9175850.6276759500

51147 0.638
Average Stack Gas Velocity, feet/second 45.76 45.73 45.20 45.563 Stack Cross-Sectional Area, square feet 530.078 530.078 530.078 530.078 Dry Volumetric Flow Rate, dry scfm 1,392,206.1 1,387,660.3 1,368,012.71,382,626.3 67 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,455,382.2 1,454,428.0 1,437,571.51,449,127.2 33 Percent Isokinetic of Sampling Rate, % 101.0 98.0 98.4 99.133 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 311.75 311.75 311.75 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 26 of 53

### Century Aluminum - ICR Testing
5/28/2013
LocationLine 4 Stack-B - Method 315 Average Run Number 1 3 5 Test Date 3/14/2013 3/14/2013 3/14/2013 Run Start Time 8:00:00 AM2:30:00 PM11:15:00 AM Run Finish Time 11:00:00 AM5:30:00 PM 2:15:00 PM Net Traversing Points 12 12 12 Net Run Time, minutes 180 180 180 Nozzle Diameter, inches 0.23 0.23 0.23 0.230 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.9968 0.9968 0.9968 0.997 Barometric Pressure, inches of Mercury 29.61 29.6 29.59 29.600 Average Orifice Meter Differential, inches H2O 1.73 1.79 1.70 1.740 Dry Gas Meter Volume Sampled, cubic feet 128.563 131.567 128.297 129.476 Average Dry Gas Meter Temperature, °F 47.83 53.96 51.71 51.167 Dry Gas Meter Volume Sampled, dscf 132.43 133.88 131.06 132.457 Total Moisture Liquid collected, g 81.9 66.1 71.9 73.300 Volume of Water Vapor, standard cubic feet 3.85 3.11 3.38 3.447 Moisture Content of Stack Gas, % 2.83 2.27 2.51 2.537 Moisture Saturation at Stack Gas Temperature, % 2.80 3.07 3.06 2.977 Dry Mole Fraction 0.972 0.9773 0.9749 0.975 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.54 28.59 28.57 28.567 Flue Gas Static Pressure, inches of H2O 0.52 0.54 0.54 0.533 Absolute Flue Gas Pressure, inches of Mercury 29.65 29.64 29.63 29.640 Average Stack Gas Temperature, °F 73.42 76.17 76.08 75.223 Average Velocity Head, inches of H2O 0.6312786209 002130.651195189

0183930.6216350591

45932 0.635
Average Stack Gas Velocity, feet/second 45.30 46.10 45.06 45.487 Stack Cross-Sectional Area, square feet 530.078 530.078 530.078 530.078 Dry Volumetric Flow Rate, dry scfm 1,373,672.6 1,397,873.5 1,362,751.51,378,099.2 00 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,440,752.0 1,466,195.7 1,433,118.91,446,688.8 67 Percent Isokinetic of Sampling Rate, % 98.4 97.8 98.2 98.133 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 311.75 311.75 311.75 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 27 of 53

### Century Aluminum - ICR Testing
5/28/2013

Included Attachments:



### Page 28 of 53

### 5/28/2013

Facility Information:

Contact: Phone: Fax: Email: Testing Company:

Contact: Phone: Fax: Email:

Air Permit Number:

Permitted Maximum Process Rate:Max. Normal Operation Process Rate: Target Process Test Rat

Description of the source (including control equipment). Please see the attachments for source or process flow diagram:

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. Industry/SCC/NAIS

Sampling Location Information:

Test Parameter Information: AFS #: FRS #:

SCC / Description

The following state and federal regulations that apply to the proposed testing: Permitted Source ID/Name:



### Page 29 of 53

### 5/28/2013

Sampling / Stack Data Results Summary

LocationLine 4 Downcomer - Method 17 Average Run Number 1 2 3
Test Date 5/7/2013 5/7/2013 5/8/2013 Run Start Time 5:30:00 PM 12:05:00 AM 2:00:00 AM

Run Finish Time 9:10:00 PM 11:45:00 PM 5:40:00 AM

Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 166.15 163.90 167.10 165.717 Moisture Content of Stack Gas, % 1.49 1.41 1.54 1.480 Moisture Saturation at Stack Gas Temperature, % 3.77 2.91 2.45 3.043 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 82.58 74.67 69.58 75.610 Dry Volumetric Flow Rate, dry scfm 892.0 881.1 896.8 889.967 Actual Wet Volumetric Flue Gas Flow Rate, acfm 935.2 910.8 918.5 921.500 Percent Isokinetic of Sampling Rate, % 100.0 99.9 100.0 99.967 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 30 of 53

### 5/28/2013

LocationLine 4 Downcomer - Method 29 Average Run Number 1 2 3
Test Date 3/12/2013 3/12/2013 3/13/2013 Run Start Time 7:00:00 PM 2:20:00 AM 2:40:00 AM

Run Finish Time 10:30:00 PM 1/1/1900 2:10:00 AM 6:10:00 AM

Net Run Time, minutes 220 220 220 Dry Gas Meter Volume Sampled, dscf 148.99 147.14 151.32 149.150 Moisture Content of Stack Gas, % 0.35 0.35 0.38 0.360 Moisture Saturation at Stack Gas Temperature, % 1.33 1.21 0.96 1.167 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 52.45 49.82 43.82 48.697 Dry Volumetric Flow Rate, dry scfm 757.0 751.0 771.0 759.667 Actual Wet Volumetric Flue Gas Flow Rate, acfm 738.3 728.6 739.5 735.467 Percent Isokinetic of Sampling Rate, % 94.8 94.4 94.6 94.600 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 31 of 53

### 5/28/2013

LocationLine 4 Downcomer - Method 315 Average Run Number 1 2 3
Test Date 3/12/2013 3/12/2013 3/13/2013 Run Start Time 7:00:00 PM 12:24:00 AM12:45:00 AM

Run Finish Time 9:30:00 PM 1/1/1900 12:05:00 AM 3:15:00 AM

Net Run Time, minutes 150 150 150 Dry Gas Meter Volume Sampled, dscf 109.12 107.68 109.19 108.663 Moisture Content of Stack Gas, % 0.35 0.33 0.29 0.323 Moisture Saturation at Stack Gas Temperature, % 1.34 1.21 1.16 1.237 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 52.60 49.90 48.70 50.400 Dry Volumetric Flow Rate, dry scfm 764.0 753.0 771.6 762.867 Actual Wet Volumetric Flue Gas Flow Rate, acfm 745.3 730.6 746.6 740.833 Percent Isokinetic of Sampling Rate, % 100.9 101.1 100.0 100.667 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 32 of 53

### 5/28/2013

LocationLine 4 Downcomer-B - Method 17 Average Run Number 4 5 6
Test Date 5/8/2013 5/8/2013 5/9/2013 Run Start Time 4:45:00 PM 12:00:00 AM 1:15:00 AM

Run Finish Time 8:25:00 PM 11:40:00 PM 4:35:00 AM

Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 163.72 162.29 165.50 163.837 Moisture Content of Stack Gas, % 1.18 1.17 1.26 1.203 Moisture Saturation at Stack Gas Temperature, % 4.99 3.27 2.67 3.643 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 91.42 78.08 72.00 80.500 Dry Volumetric Flow Rate, dry scfm 882.2 873.2 889.2 881.533 Actual Wet Volumetric Flue Gas Flow Rate, acfm 936.4 909.5 916.6 920.833 Percent Isokinetic of Sampling Rate, % 99.6 99.8 99.9 99.767 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 33 of 53

### 5/28/2013

LocationLine 4 Downcomer-B - Method 315 Average Run Number 1 2 3
Test Date 3/13/2013 3/13/2013 3/14/2013 Run Start Time 7:15:00 PM 12:00:00 AM12:45:00 AM

Run Finish Time 9:45:00 PM 11:45:00 PM 3:15:00 AM

Net Run Time, minutes 150 150 150 Dry Gas Meter Volume Sampled, dscf 112.03 107.08 107.91 109.007 Moisture Content of Stack Gas, % 0.28 0.30 0.31 0.297 Moisture Saturation at Stack Gas Temperature, % 0.75 0.74 0.77 0.753 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 37.30 37.00 38.10 37.467 Dry Volumetric Flow Rate, dry scfm 792.8 762.0 770.4 775.067 Actual Wet Volumetric Flue Gas Flow Rate, acfm 751.1 721.6 731.2 734.633 Percent Isokinetic of Sampling Rate, % 99.9 99.3 99.0 99.400 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 34 of 53

### 5/28/2013

LocationLine 4 Stack - Method 29 Average Run Number 1 2 3
Test Date 3/12/2013 3/12/2013 3/12/2013 Run Start Time 8:30:00 AM 12:10:00 PM 3:50:00 PM

Run Finish Time 12:15:00 PM3:50:00 PM 7:40:00 PM Net Run Time, minutes 240 240 240 Dry Gas Meter Volume Sampled, dscf 159.50 166.52 159.40 161.807 Moisture Content of Stack Gas, % 2.27 3.01 3.39 2.890 Moisture Saturation at Stack Gas Temperature, % 3.19 3.41 3.43 3.343 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 76.92 79.00 79.17 78.363 Dry Volumetric Flow Rate, dry scfm 1,330,962.51,321,718.1 1,338,923.51,330,534.70 0 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,414,672.21,420,079.0 1,446,158.81,426,970.00 0 Percent Isokinetic of Sampling Rate, % 91.7 96.4 91.1 93.067 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 35 of 53

### 5/28/2013

LocationLine 4 Stack - Method 315 Average Run Number 1 2 3
Test Date 3/13/2013 3/13/2013 3/13/2013 Run Start Time 9:05:00 AM 12:20:00 PM 3:35:00 PM

Run Finish Time 12:05:00 PM3:20:00 PM 6:35:00 PM Net Run Time, minutes 180 180 180 Dry Gas Meter Volume Sampled, dscf 137.82 133.19 131.86 134.290 Moisture Content of Stack Gas, % 2.55 2.46 2.89 2.633 Moisture Saturation at Stack Gas Temperature, % 2.83 2.95 2.92 2.900 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 73.75 74.92 74.67 74.447 Dry Volumetric Flow Rate, dry scfm 1,392,206.11,387,660.3 1,368,012.71,382,626.36 7 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,455,382.21,454,428.0 1,437,571.51,449,127.23 3 Percent Isokinetic of Sampling Rate, % 101.0 98.0 98.4 99.133 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 36 of 53

### 5/28/2013

LocationLine 4 Stack-B - Method 315 Average Run Number 1 3 5
Test Date 3/14/2013 3/14/2013 3/14/2013 Run Start Time 8:00:00 AM2:30:00 PM11:15:00 AM Run Finish Time 11:00:00 AM5:30:00 PM 2:15:00 PM Net Run Time, minutes 180 180 180 Dry Gas Meter Volume Sampled, dscf 132.43 133.88 131.06 132.457 Moisture Content of Stack Gas, % 2.83 2.27 2.51 2.537 Moisture Saturation at Stack Gas Temperature, % 2.80 3.07 3.06 2.977 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Average Stack Gas Temperature, °F 73.42 76.17 76.08 75.223 Dry Volumetric Flow Rate, dry scfm 1,373,672.61,397,873.5 1,362,751.51,378,099.20 0 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,440,752.01,466,195.7 1,433,118.91,446,688.86 7 Percent Isokinetic of Sampling Rate, % 98.4 97.8 98.2 98.133 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000
Fw 0 0 0 0.000
Fc 0 0 0 0.000



### Page 37 of 53

### 5/28/2013

Emissions Summary

Location: Line 4 Downcomer - Method 17 Compound: Filterable Particulate Average ProcRunID RunNumber 1 2 3 Mass_mg 22.928 13.498 16.685 1.77E+01 Elb/hr 1.63E-02 9.60E-03 1.18E-02 1.26E-02 gr/dscf 2.13E-03 1.27E-03 1.54E-03 1.65E-03



### Location: Line 4 Downcomer - Method 29 Compound: Antimony Average ProcRunID RunNumber 1 2 3 Mass_mg 0.0002 0.000387 0.000355 3.14E-04 Elb/hr 1.34E-07 2.61E-07 2.39E-07 2.11E-07 gr/dscf 2.07E-08 4.06E-08 3.62E-08 3.25E-08 mg/dscm 4.74E-05 9.29E-05 8.29E-05 7.44E-05 

### Compound: Arsenic Average ProcRunID RunNumber 1 2 3 Mass_mg 0.000569 0.000529 0.000681 5.93E-04 Elb/hr 3.82E-07 3.57E-07 4.59E-07 3.99E-07 gr/dscf 5.89E-08 5.55E-08 6.95E-08 6.13E-08 mg/dscm 1.35E-04 1.27E-04 1.59E-04 1.40E-04 

### Compound: Beryllium Average ProcRunID RunNumber 1 2 3 Mass_mg 0.000804 0.000742 0.00102 8.55E-04 Elb/hr 5.40E-07 5.01E-07 6.87E-07 5.76E-07 gr/dscf 8.33E-08 7.78E-08 1.04E-07 8.84E-08 mg/dscm 1.91E-04 1.78E-04 2.38E-04 2.02E-04 

### Compound: Cadmium Average ProcRunID RunNumber 1 2 3 Mass_mg 0.000242 0.000232 0.000338 2.71E-04 Elb/hr 1.63E-07 1.57E-07 2.28E-07 1.83E-07 gr/dscf 2.51E-08 2.43E-08 3.45E-08 2.80E-08 mg/dscm 5.74E-05 5.57E-05 7.89E-05 6.40E-05 

### Compound: Chromium Average ProcRunID



### Page 38 of 53

### 5/28/2013
RunNumber 1 2 3 Mass_mg 0.0049 0.00531 0.00869 6.30E-03 Elb/hr 3.29E-06 3.59E-06 5.86E-06 4.25E-06 gr/dscf 5.08E-07 5.57E-07 8.86E-07 6.50E-07 mg/dscm 1.16E-03 1.27E-03 2.03E-03 1.49E-03 

### Compound: Cobalt Average ProcRunID RunNumber 1 2 3 Mass_mg 0.00197 0.0013 0.0011 1.46E-03 Elb/hr 1.32E-06 8.78E-07 7.41E-07 9.80E-07 gr/dscf 2.04E-07 1.36E-07 1.12E-07 1.51E-07 mg/dscm 4.67E-04 3.12E-04 2.57E-04 3.45E-04 

### Compound: Lead Average ProcRunID RunNumber 1 2 3 Mass_mg 0.00332 0.00378 0.00533 4.14E-03 Elb/hr 2.23E-06 2.55E-06 3.59E-06 2.79E-06 gr/dscf 3.44E-07 3.96E-07 5.44E-07 4.28E-07 mg/dscm 7.87E-04 9.07E-04 1.24E-03 9.78E-04 

### Compound: Manganese Average ProcRunID RunNumber 1 2 3 Mass_mg 0.0347 0.0165 0.0118 2.10E-02 Elb/hr 2.33E-05 1.11E-05 7.95E-06 1.41E-05 gr/dscf 3.59E-06 1.73E-06 1.20E-06 2.17E-06 mg/dscm 8.23E-03 3.96E-03 2.75E-03 4.98E-03 

### Compound: Mercury Average ProcRunID RunNumber 1 2 3 Mass_mg 0.0005 0.0005 0.0005 5.00E-04 Elb/hr 3.36E-07 3.38E-07 3.37E-07 3.37E-07 gr/dscf 5.18E-08 5.24E-08 5.10E-08 5.17E-08 mg/dscm 1.19E-04 1.20E-04 1.17E-04 1.19E-04 

### Compound: Nickel Average ProcRunID RunNumber 1 2 3 Mass_mg 0.0965 0.0556 0.044 6.54E-02 Elb/hr 6.49E-05 3.75E-05 2.97E-05 4.40E-05 gr/dscf 1.00E-05 5.83E-06 4.49E-06 6.77E-06 mg/dscm 2.29E-02 1.33E-02 1.03E-02 1.55E-02



### Page 39 of 53

### 5/28/2013

Compound: Selenium Average ProcRunID RunNumber 1 2 3 Mass_mg 0.000269 0.000329 0.0002 2.66E-04 Elb/hr 1.81E-07 2.22E-07 1.35E-07 1.79E-07 gr/dscf 2.79E-08 3.45E-08 2.04E-08 2.76E-08 mg/dscm 6.38E-05 7.90E-05 4.67E-05 6.32E-05



### Location: Line 4 Downcomer - Method 315 Compound: Methylene Chloride Extractable Mat Average ProcRunID RunNumber 1 2 3 Mass_mg 3 3.4 2 2.80E+00 Elb/hr 2.78E-03 3.15E-03 1.87E-03 2.60E-03 gr/dscf 4.24E-04 4.87E-04 2.83E-04 3.98E-04 mg/dscm 9.71E-01 1.12E+00 6.47E-01 9.13E-01 

### Compound: Particulate Matter (PM) Average ProcRunID RunNumber 1 2 3 Mass_mg 10.7 8.4 8.1 9.07E+00 Elb/hr 9.91E-03 7.77E-03 7.57E-03 8.42E-03 gr/dscf 1.51E-03 1.20E-03 1.14E-03 1.28E-03 mg/dscm 3.46E+00 2.76E+00 2.62E+00 2.95E+00



### Location: Line 4 Downcomer-B - Method 17 Compound: Filterable Particulate Average ProcRunID RunNumber 4 5 6 Mass_mg 9.709 5.615 16.461 1.06E+01 Elb/hr 6.92E-03 4.00E-03 1.17E-02 7.54E-03 gr/dscf 9.15E-04 5.34E-04 1.53E-03 9.93E-04



### Location: Line 4 Downcomer-B - Method 315 Compound: Methylene Chloride Extractable Mat Average ProcRunID RunNumber 1 2 3 Mass_mg 3.2 1.4 1.7 2.10E+00 Elb/hr 3.00E-03 1.32E-03 1.61E-03 1.98E-03 gr/dscf 4.41E-04 2.02E-04 2.43E-04 2.95E-04 mg/dscm 1.01E+00 4.62E-01 5.56E-01 6.76E-01 

### Compound: Particulate Matter (PM) Average ProcRunID



### Page 40 of 53

### 5/28/2013
RunNumber 1 2 3 Mass_mg 6.8 7.7 10 8.17E+00 Elb/hr 6.37E-03 7.25E-03 9.44E-03 7.69E-03 gr/dscf 9.37E-04 1.11E-03 1.43E-03 1.16E-03 mg/dscm 2.14E+00 2.54E+00 3.27E+00 2.65E+00



### Location: Line 4 Stack - Method 29 Compound: Antimony Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00216 0.000894 0.000949 1.33E-03 Elb/hr 2.38E-03 9.39E-04 1.05E-03 1.46E-03 gr/dscf 2.09E-07 8.29E-08 9.19E-08 1.28E-07 mg/dscm 4.78E-04 1.90E-04 2.10E-04 2.93E-04 

### Compound: Arsenic Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00433 0.00494 0.00419 4.49E-03 Elb/hr 4.78E-03 5.19E-03 4.66E-03 4.88E-03 gr/dscf 4.19E-07 4.58E-07 4.06E-07 4.28E-07 mg/dscm 9.59E-04 1.05E-03 9.28E-04 9.79E-04 

### Compound: Beryllium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00684 0.00736 0.00551 6.57E-03 Elb/hr 7.55E-03 7.73E-03 6.12E-03 7.13E-03 gr/dscf 6.62E-07 6.82E-07 5.33E-07 6.26E-07 mg/dscm 1.51E-03 1.56E-03 1.22E-03 1.43E-03 

### Compound: Cadmium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00167 0.00172 0.00106 1.48E-03 Elb/hr 1.84E-03 1.81E-03 1.18E-03 1.61E-03 gr/dscf 1.62E-07 1.59E-07 1.03E-07 1.41E-07 mg/dscm 3.70E-04 3.65E-04 2.35E-04 3.23E-04 

### Compound: Chromium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0122 0.0149 0.0048 1.06E-02 Elb/hr 1.35E-02 1.56E-02 5.33E-03 1.15E-02 gr/dscf 1.18E-06 1.38E-06 4.65E-07 1.01E-06 mg/dscm 2.70E-03 3.16E-03 1.06E-03 2.31E-03



### Page 41 of 53

### 5/28/2013

Compound: Cobalt Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.00182 0.00157 0.000849 1.41E-03 Elb/hr 2.01E-03 1.65E-03 9.43E-04 1.53E-03 gr/dscf 1.76E-07 1.46E-07 8.22E-08 1.35E-07 mg/dscm 4.03E-04 3.33E-04 1.88E-04 3.08E-04 

### Compound: Lead Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0221 0.0241 0.0203 2.22E-02 Elb/hr 2.44E-02 2.53E-02 2.26E-02 2.41E-02 gr/dscf 2.14E-06 2.23E-06 1.97E-06 2.11E-06 mg/dscm 4.89E-03 5.11E-03 4.50E-03 4.83E-03 

### Compound: Magnesium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0144 0.0127 0.00971 1.23E-02 Elb/hr 1.59E-02 1.33E-02 1.08E-02 1.33E-02 gr/dscf 1.39E-06 1.18E-06 9.40E-07 1.17E-06 mg/dscm 3.19E-03 2.69E-03 2.15E-03 2.68E-03 

### Compound: Mercury Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0005 0.0006 0.000706 6.02E-04 Elb/hr 5.52E-04 6.30E-04 7.84E-04 6.55E-04 gr/dscf 4.84E-08 5.56E-08 6.84E-08 5.75E-08 mg/dscm 1.11E-04 1.27E-04 1.56E-04 1.31E-04 

### Compound: Nickel Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.0691 0.0418 0.0241 4.50E-02 Elb/hr 7.63E-02 4.39E-02 2.68E-02 4.90E-02 gr/dscf 6.69E-06 3.87E-06 2.33E-06 4.30E-06 mg/dscm 1.53E-02 8.87E-03 5.34E-03 9.84E-03 

### Compound: Selenium Average ProcRunID 1 RunNumber 1 2 3 Mass_mg 0.000683 0.000707 0.00177 1.05E-03 Elb/hr 7.54E-04 7.42E-04 1.97E-03 1.16E-03 gr/dscf 6.61E-08 6.55E-08 1.71E-07 1.01E-07


### Page 42 of 53

### 5/28/2013 mg/dscm 1.51E-04 1.50E-04 3.92E-04 2.31E-04



### Location: Line 4 Stack - Method 315 Compound: Methylene Chloride Extractable Mat Average ProcRunID RunNumber 1 2 3 Mass_mg 4.1 2.8 2.1 3.00E+00 Elb/hr 5.48E+00 3.86E+00 2.88E+00 4.07E+00 gr/dscf 4.59E-04 3.24E-04 2.46E-04 3.43E-04 mg/dscm 1.05E+00 7.43E-01 5.63E-01 7.85E-01 

### Compound: Particulate Matter (PM) Average ProcRunID RunNumber 1 2 3 Mass_mg 93.3 86.2 157.3 1.12E+02 Elb/hr 1.25E+02 1.19E+02 2.16E+02 1.53E+02 gr/dscf 1.04E-02 9.99E-03 1.84E-02 1.29E-02 mg/dscm 2.39E+01 2.29E+01 4.21E+01 2.96E+01



### Location: Line 4 Stack-B - Method 315 Compound: Methylene Chloride Extractable Mat Average ProcRunID RunNumber 1 5 3 Mass_mg 4.5 1.1 2.9 2.83E+00 Elb/hr 6.17E+00 1.51E+00 4.01E+00 3.90E+00 gr/dscf 5.24E-04 1.30E-04 3.34E-04 3.29E-04 mg/dscm 1.20E+00 2.96E-01 7.65E-01 7.54E-01 

### Compound: Particulate Matter (PM) Average ProcRunID RunNumber 1 5 3 Mass_mg 113.2 123.1 199.2 1.45E+02 Elb/hr 1.55E+02 1.69E+02 2.75E+02 2.00E+02 gr/dscf 1.32E-02 1.45E-02 2.30E-02 1.69E-02 mg/dscm 3.02E+01 3.32E+01 5.26E+01 3.87E+01



### Page 43 of 53

### 5/28/2013

Process Run Data

APCD Run Data

Process Lab Run Data Run Name Value UOM Comments Target Value 1Aluminum Produced 24.15 Tons/hr 0

Run Name Value UOM Comments Target Value 

### 1ELECTROSTATIC PRECIPITATOR - HIGH EFFICIENCY 0 0

Page 44 of 53

### 5/28/2013

Sampling / Stack Data Results Detail

LocationLine 4 Downcomer - Method 17 Average Run Number 1 2 3 Test Date 5/7/2013 5/7/2013 5/8/2013 Run Start Time 5:30:00 PM12:05:00 AM 2:00:00 AM Run Finish Time 9:10:00 PM11:45:00 PM 5:40:00 AM Net Traversing Points 12 84 108 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.39 0.39 0.39 0.390 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0062 1.0062 1.0062 1.006 Barometric Pressure, inches of Mercury 29.77 29.73 29.76 29.753 Average Orifice Meter Differential, inches H2O 1.58 1.53 1.58 1.563 Dry Gas Meter Volume Sampled, cubic feet 170.948 167.624 169.858 169.477 Average Dry Gas Meter Temperature, °F 86.00 81.92 79.25 82.390 Dry Gas Meter Volume Sampled, dscf 166.15 163.90 167.10 165.717 Total Moisture Liquid collected, g 53.4 49.9 55.5 52.933 Volume of Water Vapor, standard cubic feet 2.51 2.35 2.61 2.490 Moisture Content of Stack Gas, % 1.49 1.41 1.54 1.480 Moisture Saturation at Stack Gas Temperature, % 3.77 2.91 2.45 3.043 Dry Mole Fraction 0.9851 0.9859 0.9846 0.985 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.68 28.69 28.67 28.680 Flue Gas Static Pressure, inches of H2O -0.04 -0.04 -0.04 -0.040 Absolute Flue Gas Pressure, inches of Mercury 29.77 29.73 29.76 29.753 Average Stack Gas Temperature, °F 82.58 74.67 69.58 75.610 Average Velocity Head, inches of H2O 6.4903703492 0393E-026.235633857

12751E-020.0640730450

61705 0.064
Average Stack Gas Velocity, feet/second 14.58 14.20 14.32 14.367 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 892.0 881.1 896.8 889.967 Actual Wet Volumetric Flue Gas Flow Rate, acfm 935.2 910.8 918.5 921.500 Percent Isokinetic of Sampling Rate, % 100.0 99.9 100.0 99.967 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 45 of 53

### 5/28/2013

LocationLine 4 Downcomer - Method 29 Average Run Number 1 2 3 Test Date 3/12/2013 3/12/2013 3/13/2013 Run Start Time 7:00:00 PM2:20:00 AM 2:40:00 AM Run Finish Time 10:30:00 PM 1/1/1900 2:10:00 AM 6:10:00 AM
Net Traversing Points 12 12 12 Net Run Time, minutes 220 220 220 Nozzle Diameter, inches 0.43 0.43 0.43 0.430 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0102 1.0102 1.0102 1.010 Barometric Pressure, inches of Mercury 29.9 29.9 29.9 29.900 Average Orifice Meter Differential, inches H2O 1.66 1.63 1.71 1.667 Dry Gas Meter Volume Sampled, cubic feet 145.992 144.172 147.052 145.739 Average Dry Gas Meter Temperature, °F 64.45 64.36 60.18 62.997 Dry Gas Meter Volume Sampled, dscf 148.99 147.14 151.32 149.150 Total Moisture Liquid collected, g 11.2 10.9 12.1 11.400 Volume of Water Vapor, standard cubic feet 0.53 0.51 0.57 0.537 Moisture Content of Stack Gas, % 0.35 0.35 0.38 0.360 Moisture Saturation at Stack Gas Temperature, % 1.33 1.21 0.96 1.167 Dry Mole Fraction 0.9965 0.9965 0.9962 0.996 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.80 28.80 28.80 28.800 Flue Gas Static Pressure, inches of H2O -0.32 -0.32 -0.32 -0.320 Absolute Flue Gas Pressure, inches of Mercury 29.88 29.88 29.88 29.880 Average Stack Gas Temperature, °F 52.45 49.82 43.82 48.697 Average Velocity Head, inches of H2O 0.0431477585 519574.223623481

21617E-024.4069013614

5698E-02 0.043
Average Stack Gas Velocity, feet/second 11.51 11.36 11.53 11.467 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 757.0 751.0 771.0 759.667 Actual Wet Volumetric Flue Gas Flow Rate, acfm 738.3 728.6 739.5 735.467 Percent Isokinetic of Sampling Rate, % 94.8 94.4 94.6 94.600 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 46 of 53

### 5/28/2013

LocationLine 4 Downcomer - Method 315 Average Run Number 1 2 3 Test Date 3/12/2013 3/12/2013 3/13/2013 Run Start Time 7:00:00 PM12:24:00 AM12:45:00 AM Run Finish Time 9:30:00 PM 1/1/1900 12:05:00 AM 3:15:00 AM
Net Traversing Points 11 11 11 Net Run Time, minutes 150 150 150 Nozzle Diameter, inches 0.43 0.43 0.43 0.430 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0062 1.0062 1.0062 1.006 Barometric Pressure, inches of Mercury 29.9 29.9 29.9 29.900 Average Orifice Meter Differential, inches H2O 1.61 1.56 1.63 1.600 Dry Gas Meter Volume Sampled, cubic feet 107.263 106.232 107.153 106.883 Average Dry Gas Meter Temperature, °F 63.95 65.80 63.10 64.283 Dry Gas Meter Volume Sampled, dscf 109.12 107.68 109.19 108.663 Total Moisture Liquid collected, g 8 7.7 6.7 7.467 Volume of Water Vapor, standard cubic feet 0.38 0.36 0.32 0.353 Moisture Content of Stack Gas, % 0.35 0.33 0.29 0.323 Moisture Saturation at Stack Gas Temperature, % 1.34 1.21 1.16 1.237 Dry Mole Fraction 0.9965 0.9967 0.9971 0.997 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.80 28.80 28.81 28.803 Flue Gas Static Pressure, inches of H2O -0.32 -0.32 -0.32 -0.320 Absolute Flue Gas Pressure, inches of Mercury 29.88 29.88 29.88 29.880 Average Stack Gas Temperature, °F 52.60 49.90 48.70 50.400 Average Velocity Head, inches of H2O 4.3976450198 7817E-024.246320343

55964E-024.4486753236

8147E-02 0.044
Average Stack Gas Velocity, feet/second 11.62 11.39 11.64 11.550 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 764.0 753.0 771.6 762.867 Actual Wet Volumetric Flue Gas Flow Rate, acfm 745.3 730.6 746.6 740.833 Percent Isokinetic of Sampling Rate, % 100.9 101.1 100.0 100.667 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



### Page 47 of 53

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LocationLine 4 Downcomer-B - Method 17 Average Run Number 4 5 6 Test Date 5/8/2013 5/8/2013 5/9/2013 Run Start Time 4:45:00 PM12:00:00 AM 1:15:00 AM Run Finish Time 8:25:00 PM11:40:00 PM 4:35:00 AM Net Traversing Points 12 12 12 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.39 0.39 0.39 0.390 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0062 1.0062 1.0062 1.006 Barometric Pressure, inches of Mercury 29.79 29.62 29.62 29.677 Average Orifice Meter Differential, inches H2O 1.54 1.52 1.57 1.543 Dry Gas Meter Volume Sampled, cubic feet 169.182 169.094 171.280 169.852 Average Dry Gas Meter Temperature, °F 88.67 90.04 86.42 88.377 Dry Gas Meter Volume Sampled, dscf 163.72 162.29 165.50 163.837 Total Moisture Liquid collected, g 41.4 40.7 45.1 42.400 Volume of Water Vapor, standard cubic feet 1.95 1.92 2.12 1.997 Moisture Content of Stack Gas, % 1.18 1.17 1.26 1.203 Moisture Saturation at Stack Gas Temperature, % 4.99 3.27 2.67 3.643 Dry Mole Fraction 0.9882 0.9883 0.9874 0.988 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.71 28.71 28.70 28.707 Flue Gas Static Pressure, inches of H2O -0.04 -0.04 -0.04 -0.040 Absolute Flue Gas Pressure, inches of Mercury 29.79 29.62 29.62 29.677 Average Stack Gas Temperature, °F 91.42 78.08 72.00 80.500 Average Velocity Head, inches of H2O 6.4073045061 7049E-026.161316860

66885E-026.3247736437

3683E-02 0.063
Average Stack Gas Velocity, feet/second 14.60 14.18 14.29 14.357 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 882.2 873.2 889.2 881.533 Actual Wet Volumetric Flue Gas Flow Rate, acfm 936.4 909.5 916.6 920.833 Percent Isokinetic of Sampling Rate, % 99.6 99.8 99.9 99.767 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



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LocationLine 4 Downcomer-B - Method 315 Average Run Number 1 2 3 Test Date 3/13/2013 3/13/2013 3/14/2013 Run Start Time 7:15:00 PM12:00:00 AM12:45:00 AM Run Finish Time 9:45:00 PM11:45:00 PM 3:15:00 AM Net Traversing Points 11 11 11 Net Run Time, minutes 150 150 150 Nozzle Diameter, inches 0.43 0.43 0.43 0.430 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 1.0062 1.0062 1.0062 1.006 Barometric Pressure, inches of Mercury 29.85 29.85 29.85 29.850 Average Orifice Meter Differential, inches H2O 1.67 1.57 1.60 1.613 Dry Gas Meter Volume Sampled, cubic feet 106.391 103.387 104.387 104.722 Average Dry Gas Meter Temperature, °F 45.45 53.75 54.75 51.317 Dry Gas Meter Volume Sampled, dscf 112.03 107.08 107.91 109.007 Total Moisture Liquid collected, g 6.5 6.8 7.2 6.833 Volume of Water Vapor, standard cubic feet 0.31 0.32 0.34 0.323 Moisture Content of Stack Gas, % 0.28 0.30 0.31 0.297 Moisture Saturation at Stack Gas Temperature, % 0.75 0.74 0.77 0.753 Dry Mole Fraction 0.9972 0.997 0.9969 0.997 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.81 28.81 28.81 28.810 Flue Gas Static Pressure, inches of H2O -0.3 -0.3 -0.3 -0.300 Absolute Flue Gas Pressure, inches of Mercury 29.83 29.83 29.83 29.830 Average Stack Gas Temperature, °F 37.30 37.00 38.10 37.467 Average Velocity Head, inches of H2O 4.5978932768 8082E-024.246320343

55964E-020.0434690908

85901 0.044
Average Stack Gas Velocity, feet/second 11.71 11.25 11.40 11.453 Stack Cross-Sectional Area, square feet 1.069 1.069 1.069 1.069 Dry Volumetric Flow Rate, dry scfm 792.8 762.0 770.4 775.067 Actual Wet Volumetric Flue Gas Flow Rate, acfm 751.1 721.6 731.2 734.633 Percent Isokinetic of Sampling Rate, % 99.9 99.3 99.0 99.400 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 14 14 14 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



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LocationLine 4 Stack - Method 29 Average Run Number 1 2 3 Test Date 3/12/2013 3/12/2013 3/12/2013 Run Start Time 8:30:00 AM12:10:00 PM 3:50:00 PM Run Finish Time 12:15:00 PM3:50:00 PM 7:40:00 PM Net Traversing Points 12 12 12 Net Run Time, minutes 240 240 240 Nozzle Diameter, inches 0.23 0.23 0.23 0.230 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.9968 0.9968 0.9968 0.997 Barometric Pressure, inches of Mercury 29.25 29.27 29.24 29.253 Average Orifice Meter Differential, inches H2O 1.71 1.73 1.75 1.730 Dry Gas Meter Volume Sampled, cubic feet 160.247 168.572 160.623 163.147 Average Dry Gas Meter Temperature, °F 59.17 63.50 60.58 61.083 Dry Gas Meter Volume Sampled, dscf 159.50 166.52 159.40 161.807 Total Moisture Liquid collected, g 78.8 109.9 118.7 102.467 Volume of Water Vapor, standard cubic feet 3.71 5.17 5.59 4.823 Moisture Content of Stack Gas, % 2.27 3.01 3.39 2.890 Moisture Saturation at Stack Gas Temperature, % 3.19 3.41 3.43 3.343 Dry Mole Fraction 0.9773 0.9699 0.9661 0.971 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.59 28.51 28.47 28.523 Flue Gas Static Pressure, inches of H2O 0.55 0.53 0.56 0.547 Absolute Flue Gas Pressure, inches of Mercury 29.29 29.31 29.28 29.293 Average Stack Gas Temperature, °F 76.92 79.00 79.17 78.363 Average Velocity Head, inches of H2O 0.5984104119 598390.599281687

9451340.6197981368

7384 0.606
Average Stack Gas Velocity, feet/second 44.48 44.65 45.47 44.867 Stack Cross-Sectional Area, square feet 530.078 530.078 530.078 530.078 Dry Volumetric Flow Rate, dry scfm 1,330,962.5 1,321,718.1 1,338,923.51,330,534.7 00 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,414,672.2 1,420,079.0 1,446,158.81,426,970.0 00 Percent Isokinetic of Sampling Rate, % 91.7 96.4 91.1 93.067 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 311.75 311.75 311.75 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



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LocationLine 4 Stack - Method 315 Average Run Number 1 2 3 Test Date 3/13/2013 3/13/2013 3/13/2013 Run Start Time 9:05:00 AM12:20:00 PM 3:35:00 PM Run Finish Time 12:05:00 PM3:20:00 PM 6:35:00 PM Net Traversing Points 12 12 12 Net Run Time, minutes 180 180 180 Nozzle Diameter, inches 0.23 0.23 0.23 0.230 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.9968 0.9968 0.9968 0.997 Barometric Pressure, inches of Mercury 29.65 29.61 29.65 29.637 Average Orifice Meter Differential, inches H2O 1.75 1.76 1.72 1.743 Dry Gas Meter Volume Sampled, cubic feet 132.835 130.225 128.174 130.411 Average Dry Gas Meter Temperature, °F 44.88 51.50 49.17 48.517 Dry Gas Meter Volume Sampled, dscf 137.82 133.19 131.86 134.290 Total Moisture Liquid collected, g 76.7 71.583.499999999 9999 77.233
Volume of Water Vapor, standard cubic feet 3.61 3.36 3.93 3.633 Moisture Content of Stack Gas, % 2.55 2.46 2.89 2.633 Moisture Saturation at Stack Gas Temperature, % 2.83 2.95 2.92 2.900 Dry Mole Fraction 0.9745 0.9754 0.9711 0.974 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.56 28.57 28.53 28.553 Flue Gas Static Pressure, inches of H2O 0.56 0.56 0.53 0.550 Absolute Flue Gas Pressure, inches of Mercury 29.69 29.65 29.69 29.677 Average Stack Gas Temperature, °F 73.75 74.92 74.67 74.447 Average Velocity Head, inches of H2O 0.6450726075 549760.642176507

9175850.6276759500

51147 0.638
Average Stack Gas Velocity, feet/second 45.76 45.73 45.20 45.563 Stack Cross-Sectional Area, square feet 530.078 530.078 530.078 530.078 Dry Volumetric Flow Rate, dry scfm 1,392,206.1 1,387,660.3 1,368,012.71,382,626.3 67 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,455,382.2 1,454,428.0 1,437,571.51,449,127.2 33 Percent Isokinetic of Sampling Rate, % 101.0 98.0 98.4 99.133 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 311.75 311.75 311.75 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



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LocationLine 4 Stack-B - Method 315 Average Run Number 1 3 5 Test Date 3/14/2013 3/14/2013 3/14/2013 Run Start Time 8:00:00 AM2:30:00 PM11:15:00 AM Run Finish Time 11:00:00 AM5:30:00 PM 2:15:00 PM Net Traversing Points 12 12 12 Net Run Time, minutes 180 180 180 Nozzle Diameter, inches 0.23 0.23 0.23 0.230 Pitot Tube Coefficient 0.84 0.84 0.84 0.840 Dry Gas Meter Calibration Factor 0.9968 0.9968 0.9968 0.997 Barometric Pressure, inches of Mercury 29.61 29.6 29.59 29.600 Average Orifice Meter Differential, inches H2O 1.73 1.79 1.70 1.740 Dry Gas Meter Volume Sampled, cubic feet 128.563 131.567 128.297 129.476 Average Dry Gas Meter Temperature, °F 47.83 53.96 51.71 51.167 Dry Gas Meter Volume Sampled, dscf 132.43 133.88 131.06 132.457 Total Moisture Liquid collected, g 81.9 66.1 71.9 73.300 Volume of Water Vapor, standard cubic feet 3.85 3.11 3.38 3.447 Moisture Content of Stack Gas, % 2.83 2.27 2.51 2.537 Moisture Saturation at Stack Gas Temperature, % 2.80 3.07 3.06 2.977 Dry Mole Fraction 0.972 0.9773 0.9749 0.975 Carbon Dioxide, % 0 0 0 0.000 Oxygen, % 20.9 20.9 20.9 20.900 Carbon Monoxide & Nitrogen, % 79.1 79.1 79.1 79.100 Fuel Factor Dry Molecular Weight, lb/lb-Mole 28.84 28.84 28.84 28.840 Wet Molecular weight, lb/lb-Mole 28.54 28.59 28.57 28.567 Flue Gas Static Pressure, inches of H2O 0.52 0.54 0.54 0.533 Absolute Flue Gas Pressure, inches of Mercury 29.65 29.64 29.63 29.640 Average Stack Gas Temperature, °F 73.42 76.17 76.08 75.223 Average Velocity Head, inches of H2O 0.6312786209 002130.651195189

0183930.6216350591

45932 0.635
Average Stack Gas Velocity, feet/second 45.30 46.10 45.06 45.487 Stack Cross-Sectional Area, square feet 530.078 530.078 530.078 530.078 Dry Volumetric Flow Rate, dry scfm 1,373,672.6 1,397,873.5 1,362,751.51,378,099.2 00 Actual Wet Volumetric Flue Gas Flow Rate, acfm 1,440,752.0 1,466,195.7 1,433,118.91,446,688.8 67 Percent Isokinetic of Sampling Rate, % 98.4 97.8 98.2 98.133 Percent Excess Air, % -118,750.0 -118,750.0 -118,750.0

- 118,750.000 F-Factor, dscfm/MMBtu @ %O2 0 0 0 0.000 Round Duct Diameter, inches 311.75 311.75 311.75 Rectangular Duct Width, inches Rectangular Duct Length, inches Fw 0 0 0 0.000 Fc 0 0 0 0.000



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Included Attachments:



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