### Test ID: 4-24-13 MW POM **Value** 0 0 0

200.00 200.00 0.0013 0.0000 0.0000 200.00 200.00 0.0013

250.00 300.00 0.0026 0.0026

1225.00 1000.00 0.0004 0 0.00040

**Value** 3.0000 1.3000 4.3000 Volume of Acetone Used 2A (ml) Front half Rinses Volume of MC Used 2M (ml) Fron Half Rinses 2M W eight of MCEM From Front Half Glassware Rinses (g)

Volume of MC Used in Blank (ml) Volume of Acetone Used in Blank (ml)

Total mg of Particulate MCEM **Total mg of MCEM** 3W W eight of MCEM Impnger W ater Extracted (g). Volume of Acetone Used 3A (ml) Impinger (Back Half) Volume of MC Used 3M (ml) (Impinger Back Half) 3M W eight of MCEM From Back Glassware Rinses (g) 3M Net of MCEM Adjusted from Blanks (g)

**MCEM Analysis Calculations** 

## Potroom Roof Vent Emission Calculations MW

3W B W eight of MCEM From Extracted DI W ater Blank (g) 3W Net of Extracted W ater Adjusted from Blank (g)

Total mg of Gaseous MCEM Volume of Deionized W ater Used 3W (ml) Volume of Deionized W ater Used in Blank (ml) 2M Net MCEM Adjusted from Blank (g) Front Half Rinses 4A W eight of Acetone Blank (g) 4M W eight of MC Blank (g)



## 4-24-13 MW POM

**MCEM Analysis Data** 1A Filter W eight (g) MCEM Extracted 1B QC Filter Blank MCEM Extracted (g) Net MCEM From Filter (g)Test ID: 4-24-13 MW POM LIMS ID: **Value** 0.8146 0.84 28.84 28.80320906 0.003393998 531.6 541.6 29.97 55 1.8 1 29.97 2160 1.75 1581.722 114 29.99 0.227 0.00028104710 4.5710 48.747 95.022

**Value** 1580.3923365 46.32012 -87.7 -4.12804 201.7 9.510155 0.003394 0.447643 96.1865 Vd = Desired Velocity in stack for Isokinetic sampling

 Total sampling time required for test (min)

Bws = fraction of gas that is moisture  H@ = Orifice meter calibration factor, (in. water) Y = Dry gas meter calibration factor

Total impinger catch (ml)

I = % Isokinetic variation **Air Test Calculations**  Havg = average orifice meter differential Vm = Total sample volume from dry gas meter (dcf) * Vlc Volume collected Ps = Absolute stack gas pressure (in Hg)

Vwc (std) = converted water volume Total silica gel catch (ml)

Vwc(std) Nozzle diameter (in) Area of Nozzle (ft^2) Vr = Average Anemometer Velocity during test.
Ratio of Vs/Vd*100 (Must be less than 120%)

Vm (std) = Volume of sample measured by DGM (dscf) Vs = Average stack gas velocity

Vwsg (std) = converted silica gel water volume Ms = Stack gas (wet) molecular weight (lb/lb-mole) Bws = Stack gas moisture content

Pbar = Barometric pressure, (in. Hg)

**Potroom Roof Vent Emission Calculations MW**

**4-24-13 MW POM**

 p = Stack gas velocity pressure (avg. sqrt  p - in. water) Cp = Pitot tube calibration coefficient Md = Stack gas dry molecular weight, (lb/lb-mole)

Tm = Absolute average dry gas meter temp (R). Ts = Stack gas absolute average temperature (R) Pm = Pressure at orifice meter (in. Hg) Ta = Sampling site ambient temperature, (°F)Test ID: 4-24-13 MW POM LIMS ID: 0



### Value 3.0000 0.003 1.3 0.0013 1580.392336 4.5710 88.25 29.97 17004 404.8151667 0.003393998 269010203.2 2.25 53.99 0.97 23.40



### Value **0.13 0.06**  **0.19** Total mg of MCEM in Particulate Sample Total g of MCEM in Particulate Sample Total mg of MCEM in Gaseous Sample 

## Potroom Roof Vent Emission Calculations MW

**4-24-13 MW POM**

**Combined Method 5 Parameter and Analytical**

Total g of MCEM in Gaseous Sample

Vm(std) Volume of Air Sampled by DGM (dscf)
Tr Average Temperature of Roof Vent During Test (°F) Pbar Barometric Pressure During Test (in Hg) Area of Potroom Roof Vent (ft2)

Emission Rate of Gaseous MCEM lb/d Month Av erage Tons of Aluminum Produced per day (Line 1)

Emission Rate of Gaseous MCEM lb/hr Vr Velocity of Roof Vent Emissions During Test (ft/s)

Bws Moisture in Roof Emissions Qstd Flow of Roof Vent Emissions (dscf/hr)

Total Pounds of MCEM from Roof Vents per Ton of Aluminum Produced (lb/ton Al) Emission Rate of Particulate MCEM lb/hr Emission Rate of Particulate MCEM lb/d

Pounds of Gaseous MCEM per Ton of Aluminum Produced (lb/ton Al) Pounds of Particulate MCEM per Ton of Aluminum Produced (lb/ton Al) 

### Air Test Final ResultsEp= 2[(C s2 Q sd ) / (PK)] Value where Ep= roof vent emission rate of POM from potline II (lb/ton Al) **0.19**

2 = conversion factor to account for two potrooms per potline 2 C s2 = concentration of POM as measured for roof vent emissions (mg/dscf) 0.002721 Q sd= volumetric flow rate of roof vent effluent gas (dscf/hr) 269,010,203.156 P = potline II aluminum production rate (ton/hr) 16.87 K = conversion factor (453,600 mg/lb) 453,600



### Concentration of POM as Measured for Roof Vent Emissions

C s2 = M MCEM/ V v Value where C s2 = concentration of POM as measured for roof vent emissions (mg/dscf) 0.0027

M MCEM= mass of methylene chlorine extractable matter in sample (mg) 4.3 V v = volume of roof vent sample gas (dscf) 1580.39



### Volumetric Flow Rate of Roof Vent Effluent Gas

Qsd = 3600 (1-Bws) Vv As (528/Ts) (Ps/29.92) Value where Qsd = volumetric flow rate of roof vent effluent gas (dscf/hr) 269,010,203

528 = standard temperature (R) 528 vv = average velocity of roof vent effluent gas (ft/hr) 16,456 Pv = barometric pressure in the roof vent (in Hg) 29.97 A = area of potroom roof vent (ft2) 17,004 Md = mole fraction of dry gas 0.9966 Tv = roof vent temperature (°F) 88.25 460 = conversion factor (°F toR) 460 29.92 = standard pressure (in Hg) 29.92 

## 40 CFR Part 63 Subpart LL - NESHAP for Primary Aluminum Reduction Plants

**§ 63.847(d)(2) - POM Roof Vent Emissions from Potlines**

**Roof Vent Emission Rate of POM from MW Potlines**Units **lb/ton Al**

mg/dscf dscf/hr ton/hr mg/lb

Units mg/dscf
mg dscf

Units dscf/hr R ft/hr in Hg ft2

°F R in Hg 

## 40 CFR Part 63 Subpart LL - NESHAP for Primary Aluminum Reduction Plants

### Value 51.00 0.0510 1580.3923 4.571 88.25 29.97 17004 404.81517 0.003394 269010203

**Value** 38.24 917.82 2.27 Emission Rate of Particulate lb Particulate/hr Emission Rate of particulate lb particulate/d Pounds of Particulate per Ton of Aluminum Produced (lb Particulate/ton Al) Area of Potroom Roof Vent (ft2) Month Average Tons of Aluminum Produced per day (Line 3) Bws Moisture in Roof Emissions Qstd Flow of Roof Vent Emissions (dscf/hr) **Combined Method 5 Parameter and Analytical Potroom Roof Vent Emission Calculations MW** 

**4-24-13 MW POM**

**Air Test Final Results** Total mg of Particulate Total g of Particulate Vm(std) Volume of Air Sampled by DGM (dscf) Vr Velocity of Roof Vent Emissions During Test (ft/s) Tr Average Temperature of Roof Vent During Test (°F) Pbar Barometric Pressure During Test (in Hg)Ep= 2[(C s2 Q sd ) / (PK)] Value Units where Ep= roof vent emission rate of Particulate from potline I (lb/ton Al) **2.27 lb/ton Al** 

2 = conversion factor to account for two potrooms per potline 2 C s2 = concentration of Particulate as measured for roof vent emissions (mg/dscf) 0.0323 mg/dscf Q sd= volumetric flow rate of roof vent effluent gas (dscf/hr) 269,010,203 dscf/hr P = potline I aluminum production rate (ton/hr) 16.87 ton/hr K = conversion factor (453,600 mg/lb) 453,600 mg/lb



### Concentration of Particulate as Measured for Roof Vent Emissions

C s2 = MPART / V v Value Units where C s2 = concentration of Particulate as measured for roof vent emissions (mg/dscf) 0.0323 mg/dscf

Mpart = mass of particulate in sample (mg) 51 mg V v = volume of roof vent sample gas (dscf) 1580.39 dscf



### Volumetric Flow Rate of Roof Vent Effluent Gas

Qsd = 3600 (1-Bws) Vv As (528/Ts) (Ps/29.92) Value Units where Qsd = volumetric flow rate of roof vent effluent gas (dscf/hr) 269,010,203 dscf/hr

528 = standard temperature (R) 528 R vv = average velocity of roof vent effluent gas (ft/hr) 16,456 ft/hr Pv = barometric pressure in the roof vent (in Hg) 29.97 in Hg A = area of potroom roof vent (ft2) 17,004 ft2 Md = mole fraction of dry gas 0.9966 Tv = roof vent temperature (°F) 88.25 °F 460 = conversion factor (°F toR) 460 R 29.92 = standard pressure (in Hg) 29.92 in Hg 

## 40 CFR Part 63 Subpart LL - NESHAP for Primary Aluminum Reduction Plants **§ 63.847(d)(2) - Particulate Roof Vent Emissions from Potlines**

**Roof Vent Emission Rate of Particulate from MW Potline**