Summary of Stack Gas Parameters and Test Results

Rio Tinto Alcan US EPA Test Method 315 (Polycyclic Organic Matter)

Potline 3 163S A-398 Scrubber

Page 1 of 2 MB# 1641 MB# 1869 MB# 1869 RUN NUMBER Section 3 Section 4 Section 5 RUN DATE 4/18/2013 4/18/2013 4/17/2013 Average RUN TIME 10:41-15:35 10:37-15:32 10:28-14:38 Runs 1-3
MEASURED DATA DH@ Orifice Meter Calibration Coef., in. H 2O 1.7306 1.7832 1.7832 1.7657 Pstatic Stack Static Pressure, inches H 2O -0.14 -0.14 -0.14 -0.14 y Meter Box Correction Factor 1.0042 1.0075 1.0075 1.0064 P bar Barometric Pressure, inches Hg 29.82 29.82 29.82 29.82 Vm Sample Volume, ft3 172.854 165.987 157.697 165.513 Dp 1/2 Average Square Root Dp, (in. H 2O) 1/2 0.6202 0.6218 0.6062 0.6161 DH Avg Meter Orifice Pressure, in. H 2O 1.470 1.490 1.430 1.463 T m Average Meter Temperature, °F 103.05 85.60 95.00 94.55 Ts Average Stack Temperature, °F 213.50 215.30 217.40 215.40 Vlc Condensate Collected, ml 59.3 53.6 74.7 62.5 CO2wet Carbon Dioxide content, % by volume, wet, if measured - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - O2wet Oxygen content, % by volume, wet, if measured - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - CO2dry Carbon Dioxide content, % by volume, dry 0.5 0.5 0.5 0.5 O2dry Oxygen content, % by volume, dry 19.5 19.5 19.5 19.5 N 2 Nitrogen content, % by volume 80.0 80.0 80.0 80.0 C p Pitot Tube Coefficient 0.84 0.84 0.84 0.84 Circular Stack? 1=Y,0=N: 0 0 0 D e/As Stack Dim- Circular (Dia-in) or Rectangular (Area-in 2): 2880.00 2880.00 2880.00 2880.00 Q Sample Run Duration, minutes 240.0 240.0 240.0 240.0 D n Nozzle Diameter, inches 0.260 0.260 0.260 0.260
CALCULATED DATA
An Nozzle Area, ft2 0.000369 0.000369 0.000369 0.000369 Vm(std) Standard Meter Volume, ft3 162.819 161.889 151.176 158.628 Vm(std) Standard Meter Volume, m 3 4.611 4.584 4.281 4.492 Q m Average Sampling Rate, dscfm 0.678 0.675 0.630 0.661 Ps Stack Pressure, inches Hg 29.81 29.81 29.81 29.81 Bws Moisture, % by volume 1.7 1.5 2.3 1.8 Bws(sat) Moisture (at saturation), % by volume 103.4 107.1 111.6 107.4 1-Bws Dry Mole Fraction 0.983 0.985 0.977 0.982 M d Molecular Weight (d.b.), lb/lb•mole 28.86 28.86 28.86 28.86 M s Molecular Weight (w.b.), lb/lb•mole 28.68 28.69 28.61 28.66 Vs Stack Gas Velocity, ft/s 39.5 39.7 38.8 39.3 A Stack Area, ft2 20.0 20.0 20.0 20.00 Qa Stack Gas Volumetric Flow, acfm 47,442 47,614 46,553 47,203 Qs Stack Gas Volumetric Flow, dscfm 36,430 36,521 35,329 36,093 Qs Stack Gas Volumetric Flow, dscmm 1,032 1,034 1,000 1,022 I Isokinetic Sampling Ratio, % 101.0 100.1 96.7 99.3 Project # 13661-21



### Page 1 of 2Summary of Stack Gas Parameters and Test Results Project # 13661-21 Rio Tinto Alcan US EPA Test Method 315 (Polycyclic Organic Matter)

Potline 3 163S A-398 Scrubber

Page 2 of 2

RUN NUMBER Section 3 Section 4 Section 5 RUN DATE 4/18/2013 4/18/2013 4/17/2013 Average RUN TIME 10:41-15:35 10:37-15:32 10:28-14:38
EMISSIONS DATA

Particulate Matter PM Filter Weight Gain, mg 9.90 9.40 11.40 10.23 PM Beaker Weight Gain, mg 2.20 5.10 9.00 5.43 PM Total Catch, g 0.0121 0.0145 0.0204 0.0157 C PM-1 Concentration, gr/dscf 1.15E-03 1.38E-03 2.08E-03 1.54E-03 C PM-2 Concentration, lb/dscf 1.64E-07 1.97E-07 2.97E-07 2.20E-07 E PM-1 Emission Rate, lb/hr 0.358 0.433 0.631 0.474 E PM-2 Emission Rate, lb/ton aluminum 0.0799 0.0966 0.1404 0.106

Methylene Chloride Extractable Matter Filter Weight Gain, mg 0.4 1.1 0.8 0.77 Front-half Weight Gain, mg 1.5 3.2 1.5 2.07 Impinger Weight Gain, mg 0.7 0.5 0.5 0.57 Back-half Weight Gain, mg 2.5 2.3 2.4 2.40 Total Acetone Blank, mg 0.1 0.1 0.2 Total MeCl Blank, mg 0.2 0.2 0.2 Total Filter Blank, mg 0.5 0.5 0.5 MCEM Total Catch, g 0.0043 0.0063 0.0043 0.0050 C MCEM-1 Concentration, gr/dscf 4.08E-04 6.01E-04 4.39E-04 4.82E-04 C MCEM-2 Concentration, lb/dscf 5.82E-08 8.58E-08 6.27E-08 6.89E-08 E MCEM-1 Emission Rate, lb/hr 0.127 0.188 0.133 0.149 E MCEM-2 Emission Rate, lb/ton aluminum 0.0284 0.0420 0.0296 0.033

Production: Tons aluminum per hour 4.480 4.480 4.490 4.483



### Page 2 of 2Summary of Stack Gas Parameters and Test Results

Rio Tinto Alcan US EPA Test Methods 5 (Filterable Particulate Matter - PM) & 29 (Metallic HAPS)

Room 6 Roof Monitor Sampling Manifold (aka Downcomer) Page 1 of 3 1534 RUN NUMBER 1 2 3

RUN DATE 4/16-17/13 4/17-18/13 4/18-19/13 Average RUN TIME 14:03-14:15 15:08-15:19 16:16-16:25 Runs 1-3
MEASURED DATA DH@ Orifice Meter Calibration Coef., in. H 2O 1.6095 1.6095 1.6095 1.6095 Pstatic Stack Static Pressure, inches H 2O 0.43 0.43 0.43 0.43 y Meter Box Correction Factor 1.0032 1.0032 1.0032 1.0032 P bar Barometric Pressure, inches Hg 29.70 29.68 29.62 29.67 Vm Sample Volume, ft3 1423.922 822.621 831.070 1025.871 Dp 1/2 Average Square Root Dp, (in. H 2O) 1/2 0.8293 0.8595 0.8713 0.8534 DH Avg Meter Orifice Pressure, in. H 2O 2.800 0.878 0.918 1.532 T m Average Meter Temperature, °F 95.08 94.71 75.35 88.38 Ts Average Stack Temperature, °F 106.00 113.92 79.83 99.92 Vlc Condensate Collected, ml 306.9 269.7 212.8 263.1 CO2 Carbon Dioxide content, dry % by volume 0.5 0.5 0.0 0.3 O2 Oxygen content, dry % by volume 20.0 20.0 20.0 20.0 N 2 Nitrogen content, dry % by volume 79.5 79.5 80.0 79.7 C p Pitot Tube Coefficient 0.84 0.84 0.84 0.84

Circular Stack? 1=Y,0=N: 1 1 1 As Diameter or Dimensions, inches: 14.00 14.00 14.00 14.00 Q Sample Run Duration, minutes 1440.0 1440.0 1440.0 1440.0 D n Nozzle Diameter, inches 0.258 0.190 0.190 0.213

CALCULATED DATA
An Nozzle Area, ft2 0.000363 0.000197 0.000197 0.000252 Vm(std) Standard Meter Volume, ft3 1358.140 780.912 815.887 984.979 Vm(std) Standard Meter Volume, m 3 38.458 22.113 23.103 27.892 Q m Average Sampling Rate, dscfm 0.943 0.542 0.567 0.684 Ps Stack Pressure, inches Hg 29.73 29.71 29.65 29.70 Bws Moisture, % by volume 1.1 1.6 1.2 1.3 Bws(sat) Moisture (at saturation), % by volume 7.8 9.8 3.5 7.0 Vwstd Standard Water Vapor Volume, ft 3 14.470 12.716 10.034 12.407 1-Bws Dry Mole Fraction 0.989 0.984 0.988 0.987 M d Molecular Weight (d.b.), lb/lb•mole 28.88 28.88 28.80 28.85 M s Molecular Weight (w.b.), lb/lb•mole 28.77 28.71 28.67 28.71 Vs Stack Gas Velocity, ft/s 48.4 50.6 49.9 49.6 A Stack Area, ft2 1.1 1.1 1.1 1.07 Qa Stack Gas Volumetric Flow, acfm 3,107 3,247 3,198 3,184 Qs Stack Gas Volumetric Flow, dscfm 2,850 2,919 3,062 2,944 Qs Stack Gas Volumetric Flow, dscmm 81 83 87 83 I Isokinetic Sampling Ratio, % 97.4 100.8 100.4 99.5
Ts- Roof Average Roof Temperature, °F 105.8 113.3 79.0 99.4 Vs- Roof Stack Gas Velocity, ft/min (*) 268.0 277.5 238.2 261.2 A- Roof Roof Area, ft2(**) 4,252 4,252 4,252 4,252 Qa- Roof Stack Gas Volumetric Flow, acfm 1,139,559 1,199,416 1,074,356 1,137,777 Qs- Roof Stack Gas Volumetric Flow, dscfm 1,042,924 1,069,617 1,018,743 1,043,761 Qs- Roof Stack Gas Volumetric Flow, dscmm 29,532 30,288 28,848 29,556

(*) measured by plant roof-mounted anemometers (**) as reported by Alcan Project # 13661-21



### Page 1 of 4Summary of Stack Gas Parameters and Test Results Project # 13661-21 Rio Tinto Alcan US EPA Test Methods 5 (Filterable Particulate Matter - PM) & 29 (Metallic HAPS)

Room 6 Roof Monitor Sampling Manifold (aka Downcomer) Page 2 of 3

RUN NUMBER 1 2 3 RUN DATE 4/16-17/13 4/17-18/13 4/18-19/13 Average RUN TIME 14:03-14:15 15:08-15:19 16:16-16:25
EMISSIONS DATA

Particulate Matter PM Filter Weight Gain, mg 16.10 35.40 50.40 33.97 PM Beaker Weight Gain, mg 24.80 66.40 18.30 36.50 PM Total Catch, g 0.0409 0.1018 0.0687 0.0705 C PM-1 Concentration, gr/dscf 4.65E-04 2.01E-03 1.30E-03 1.26E-03 C PM-2 Concentration, lb/dscf 6.64E-08 2.87E-07 1.86E-07 1.80E-07 E PM-1 Emission Rate, lb/hr 4.154 18.444 11.347 11.315 E PM-2 Emission Rate, lb/ton aluminum 1.8464 8.0541 4.9120 4.937

Antimony (Sb) Sb 

### mg/sample (front half) 4.3 6.6 3.7 4.87 Sb 

### mg/sample (back half) 1.00 0.86 0.92 0.93 Sb g/sample 5.30E-06 7.46E-06 4.62E-06 5.79E-06 CSb-1 Concentration, gr/dscf 6.02E-08 1.47E-07 8.74E-08 9.83E-08 CSb-2 Concentration, lb/dscf 8.60E-12 2.11E-11 1.25E-11 1.40E-11 E Sb-1 Emission Rate, lb/hr 5.38E-04 1.35E-03 7.63E-04 8.84E-04 E Sb-2 Emission Rate, lb/ton aluminum 2.39E-04 5.90E-04 3.30E-04 3.87E-04

Arsenic (As) As 

### mg/sample (front half) 16.7 22.6 12.7 17.33 As 

### mg/sample (back half) 0.25 0.28 0.25 0.26 As g/sample 1.70E-05 2.29E-05 1.30E-05 1.76E-05 CAs-1 Concentration, gr/dscf 1.93E-07 4.52E-07 2.45E-07 2.97E-07 CAs-2 Concentration, lb/dscf 2.75E-11 6.46E-11 3.50E-11 4.24E-11 EAs-1 Emission Rate, lb/hr 1.72E-03 4.15E-03 2.14E-03 2.67E-03 EAs-2 Emission Rate, lb/ton aluminum 7.65E-04 1.81E-03 9.26E-04 1.17E-03

Beryllium (Be) Be 

### mg/sample (front half) 4.7 5.4 3.8 4.63 Be 

### mg/sample (back half) 0.015 0.015 0.015 0.02 Be g/sample 4.72E-06 5.42E-06 3.82E-06 4.65E-06 C Be-1 Concentration, gr/dscf 5.36E-08 1.07E-07 7.22E-08 7.76E-08 C Be-2 Concentration, lb/dscf 7.65E-12 1.53E-11 1.03E-11 1.11E-11 E Be-1 Emission Rate, lb/hr 4.79E-04 9.81E-04 6.30E-04 6.97E-04 E Be-2 Emission Rate, lb/ton aluminum 2.13E-04 4.28E-04 2.73E-04 3.05E-04

Cadmium (Cd) Cd 

### mg/sample (front half) 2.0 3.3 0.94 2.08 Cd 

### mg/sample (back half) 1.1 0.12 0.30 0.51 Cd g/sample 3.10E-06 3.42E-06 1.24E-06 2.59E-06 CCd-1 Concentration, gr/dscf 3.52E-08 6.76E-08 2.35E-08 4.21E-08 CCd-2 Concentration, lb/dscf 5.03E-12 9.65E-12 3.35E-12 6.01E-12 E Cd-1 Emission Rate, lb/hr 3.15E-04 6.20E-04 2.05E-04 3.80E-04 E Cd-2 Emission Rate, lb/ton aluminum 1.40E-04 2.71E-04 8.87E-05 1.66E-04

Chromium (Cr) Cr 

### mg/sample (front half) 10.7 10.8 9.2 10.23 Cr 

### mg/sample (back half) 6.7 6.9 6.6 6.73 Cr g/sample 1.74E-05 1.77E-05 1.58E-05 1.70E-05 CCr-1 Concentration, gr/dscf 1.98E-07 3.50E-07 2.99E-07 2.82E-07 CCr-2 Concentration, lb/dscf 2.82E-11 5.00E-11 4.27E-11 4.03E-11 E Cr-1 Emission Rate, lb/hr 1.77E-03 3.21E-03 2.61E-03 2.53E-03 E Cr-2 Emission Rate, lb/ton aluminum 7.86E-04 1.40E-03 1.13E-03 1.11E-03



### Page 2 of 4Summary of Stack Gas Parameters and Test Results Project # 13661-21 Rio Tinto Alcan US EPA Test Methods 5 (Filterable Particulate Matter - PM) & 29 (Metallic HAPS)

Room 6 Roof Monitor Sampling Manifold (aka Downcomer) Page 3 of 3

RUN NUMBER 1 2 3 RUN DATE 4/16-17/13 4/17-18/13 4/18-19/13 Average RUN TIME 14:03-14:15 15:08-15:19 16:16-16:25 Cobalt (Co) Co 

### mg/sample (front half) 0.18 0.081 0.081 0.11 Co 

### mg/sample (back half) 0.32 0.14 1.00 0.49 Co g/sample 5.00E-07 2.21E-07 1.08E-06 6.01E-07 CCo-1 Concentration, gr/dscf 5.68E-09 4.37E-09 2.04E-08 1.02E-08 CCo-2 Concentration, lb/dscf 8.12E-13 6.24E-13 2.92E-12 1.45E-12 E Co-1 Emission Rate, lb/hr 5.08E-05 4.00E-05 1.79E-04 8.98E-05 E Co-2 Emission Rate, lb/ton aluminum 2.26E-05 1.75E-05 7.73E-05 3.91E-05

Lead (Pb) Pb 

### mg/sample (front half) 5.7 7.9 0.95 4.85 Pb 

### mg/sample (back half) 0.91 0.27 0.6 0.59 Pb g/sample 6.61E-06 8.17E-06 1.53E-06 5.44E-06 C Pb-1 Concentration, gr/dscf 7.51E-08 1.61E-07 2.89E-08 8.85E-08 C Pb-2 Concentration, lb/dscf 1.07E-11 2.31E-11 4.13E-12 1.26E-11 E Pb-1 Emission Rate, lb/hr 6.71E-04 1.48E-03 2.53E-04 8.01E-04 E Pb-2 Emission Rate, lb/ton aluminum 2.98E-04 6.46E-04 1.09E-04 3.51E-04

Manganese (Mn) Mn 

### mg/sample (front half) 3.4 4.1 7.1 4.87 Mn 

### mg/sample (back half) 0.84 0.79 0.75 0.79 Mn g/sample 4.24E-06 4.89E-06 7.85E-06 5.66E-06 C Mn-1 Concentration, gr/dscf 4.82E-08 9.66E-08 1.48E-07 9.78E-08 C Mn-2 Concentration, lb/dscf 6.88E-12 1.38E-11 2.12E-11 1.40E-11 E Mn-1 Emission Rate, lb/hr 4.31E-04 8.86E-04 1.30E-03 8.71E-04 E Mn-2 Emission Rate, lb/ton aluminum 1.91E-04 3.87E-04 5.61E-04 3.80E-04

Nickel (Ni) Ni 

### mg/sample (front half) 175.0 186.0 102.0 154.33 Ni 

### mg/sample (back half) 1.7 0.87 1.90 1.49 Ni g/sample 1.77E-04 1.87E-04 1.04E-04 1.56E-04 C Ni-1 Concentration, gr/dscf 2.01E-06 3.69E-06 1.97E-06 2.56E-06 C Ni-2 Concentration, lb/dscf 2.87E-10 5.28E-10 2.81E-10 3.65E-10 E Ni-1 Emission Rate, lb/hr 1.79E-02 3.39E-02 1.72E-02 2.30E-02 E Ni-2 Emission Rate, lb/ton aluminum 7.98E-03 1.48E-02 7.43E-03 1.01E-02

Selenium (Se) Se 

### mg/sample (front half) 2.4 2.2 2.0 2.20 Se 

### mg/sample (back half) 0.35 0.35 0.40 0.37 Se g/sample 2.75E-06 2.55E-06 2.40E-06 2.57E-06 CSe-1 Concentration, gr/dscf 3.12E-08 5.04E-08 4.54E-08 4.23E-08 CSe-2 Concentration, lb/dscf 4.46E-12 7.20E-12 6.48E-12 6.05E-12 E Se-1 Emission Rate, lb/hr 2.79E-04 4.62E-04 3.96E-04 3.79E-04 E Se-2 Emission Rate, lb/ton aluminum 1.24E-04 2.02E-04 1.72E-04 1.66E-04

Mercury (Hg) Hg 

### mg/sample (front half) 0.08 0.08 0.08 0.08 Hg 

### mg/sample (back half) 0.12 0.12 0.12 0.12 Hg g/sample 2.00E-07 2.00E-07 2.00E-07 2.00E-07 C Hg-1 Concentration, gr/dscf 2.27E-09 3.95E-09 3.78E-09 3.34E-09 C Hg-2 Concentration, lb/dscf 3.25E-13 5.65E-13 5.40E-13 4.77E-13 E Hg-1 Emission Rate, lb/hr 2.03E-05 3.62E-05 3.30E-05 2.99E-05 E Hg-2 Emission Rate, lb/ton aluminum 9.03E-06 1.58E-05 1.43E-05 1.31E-05

Production: Tons of Aluminum per hour 2.250 2.290 2.310 2.283


### Page 3 of 4Italics Below Detection Level

Bold Method blank contamination. The

associated method blank contains the target analyte at a reportable level Metallic HAPS Legend



### Page 4 of 4Summary of Stack Gas Parameters and Test Results

Rio Tinto Alcan US EPA Test Method 315 (Polycyclic Organic Matter) Room 6 Roof Monitor Sampling Manifold (aka Downcomer) Page 1 of 2 1311 RUN NUMBER 1 2 3

RUN DATE 4/16-17/13 4/17-18/13 4/18-19/13 Average RUN TIME 14:04-14:14 15:09-15:18 16:15-16:24 Runs 1-3
MEASURED DATA DH@ Orifice Meter Calibration Coef., in. H 2O 1.7411 1.7411 1.7411 1.7411 Pstatic Stack Static Pressure, inches H 2O 0.43 0.43 0.43 0.43 y Meter Box Correction Factor 0.9952 0.9952 0.9952 0.9952 P bar Barometric Pressure, inches Hg 29.54 29.33 29.25 29.37 Vm Sample Volume, ft3 1382.054 557.047 561.986 833.696 Dp 1/2 Average Square Root Dp, (in. H 2O) 1/2 0.7941 0.8461 0.8715 0.8372 DH Avg Meter Orifice Pressure, in. H 2O 2.754 0.405 0.443 1.201 T m Average Meter Temperature, °F 87.46 87.42 69.58 81.49 Ts Average Stack Temperature, °F 105.50 112.63 78.25 98.79 Vlc Condensate Collected, ml 277.3 175.4 179.2 210.6 CO2 Carbon Dioxide content, dry % by volume 0.5 0.5 0.0 0.3 O2 Oxygen content, dry % by volume 20.0 20.0 20.0 20.0 N 2 Nitrogen content, dry % by volume 79.5 79.5 80.0 79.7 C p Pitot Tube Coefficient 0.84 0.84 0.84 0.84

Circular Stack? 1=Y,0=N: 1 1 1 As Diameter or Dimensions, inches: 14.00 14.00 14.00 14.00 Q Sample Run Duration, minutes 1440.0 1440.0 1440.0 1440.0 D n Nozzle Diameter, inches 0.258 0.155 0.155 0.189

CALCULATED DATA
An Nozzle Area, ft2 0.000363 0.000131 0.000131 0.000208 Vm(std) Standard Meter Volume, ft3 1318.664 524.697 545.737 796.366 Vm(std) Standard Meter Volume, m 3 37.340 14.858 15.454 22.551 Q m Average Sampling Rate, dscfm 0.916 0.364 0.379 0.553 Ps Stack Pressure, inches Hg 29.57 29.36 29.28 29.40 Bws Moisture, % by volume 1.0 1.6 1.5 1.4 Bws(sat) Moisture (at saturation), % by volume 7.7 9.5 3.3 6.8 Vwstd Standard Water Vapor Volume, ft 3 13.075 8.270 8.449 9.931 1-Bws Dry Mole Fraction 0.990 0.984 0.985 0.986 M d Molecular Weight (d.b.), lb/lb•mole 28.88 28.88 28.80 28.85 M s Molecular Weight (w.b.), lb/lb•mole 28.77 28.71 28.64 28.71 Vs Stack Gas Velocity, ft/s 46.5 50.1 50.1 48.9 A Stack Area, ft2 1.1 1.1 1.1 1.07 Qa Stack Gas Volumetric Flow, acfm 2,982 3,212 3,216 3,137 Qs Stack Gas Volumetric Flow, dscfm 2,725 2,861 3,041 2,875 Qs Stack Gas Volumetric Flow, dscmm 77 81 86 81 I Isokinetic Sampling Ratio, % 98.9 103.9 101.6 101.5
Ts- Roof Average Roof Temperature, °F 105.8 113.3 79.0 99.4 Vs- Roof Stack Gas Velocity, ft/min (*) 268.0 282.1 252.7 267.6 A- Roof Roof Area, ft2(**) 4,252 4,252 4,252 4,252 Qa- Roof Stack Gas Volumetric Flow, acfm 1,139,559 1,199,416 1,074,356 1,137,777 Qs- Roof Stack Gas Volumetric Flow, dscfm 1,042,924 1,069,617 1,018,743 1,043,761 Qs- Roof Stack Gas Volumetric Flow, dscmm 29,532 30,288 28,848 29,556

(*) measured by plant roof-mounted anemometers (**) as reported by Alcan Project # 13661-21



### Page 1 of 2Summary of Stack Gas Parameters and Test Results Project # 13661-21 Rio Tinto Alcan US EPA Test Method 315 (Polycyclic Organic Matter) Room 6 Roof Monitor Sampling Manifold (aka Downcomer) Page 2 of 2

RUN NUMBER 1 2 3 RUN DATE 4/16-17/13 4/17-18/13 4/18-19/13 Average RUN TIME 14:04-14:14 15:09-15:18 16:15-16:24
EMISSIONS DATA

Particulate Matter PM Filter Weight Gain, mg 22.60 25.60 15.30 21.17 PM Beaker Weight Gain, mg 23.40 20.70 14.50 19.53 PM Total Catch, g 0.0460 0.0463 0.0298 0.0407 C PM-1 Concentration, gr/dscf 5.38E-04 1.36E-03 8.43E-04 9.14E-04 C PM-2 Concentration, lb/dscf 7.69E-08 1.95E-07 1.20E-07 1.31E-07 E PM-1 Emission Rate, lb/hr 4.81 12.48 7.36 8.218 E PM-2 Emission Rate, lb/ton aluminum 2.1388 5.4518 3.1854 3.5920

Methylene Chloride Extractable Matter Filter Weight Gain, mg 0.7 1.5 1.3 1.17 Front-half Weight Gain, mg 1.2 2.0 2.2 1.80 Impinger Weight Gain, mg 0.5 0.5 0.9 0.63 Back-half Weight Gain, mg 2.9 2.8 2.5 2.73 Total Acetone Blank, mg 0.1 0.2 0.1 Total MeCl Blank, mg 0.2 0.2 0.2 Total Filter Blank, mg 0.5 0.5 0.5 MCEM Total Catch, g 0.0045 0.0059 0.0061 0.0055 C MCEM-1 Concentration, gr/dscf 5.27E-05 1.74E-04 1.72E-04 1.33E-04 C MCEM-2 Concentration, lb/dscf 7.52E-09 2.48E-08 2.46E-08 1.90E-08 E MCEM-1 Emission Rate, lb/hr 0.47 1.59 1.51 1.19 E MCEM-2 Emission Rate, lb/ton aluminum 0.21 0.69 0.65 0.52

Production: Tons of Aluminum per hour 2.250 2.290 2.310 2.283



### Page 2 of 2