### Test ID: 4-22-13 MW POM **Value** 0 0 0

180.00 160.00 0.0018 0.0000 0.0000 200.00 200.00 0.0018

225.00 300.00 0.0036 0.0036

1150.00 1000.00 0.0003 0 0.00030

**Value** 3.9000 1.8000 5.7000 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)



## 4-22-13 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: 4-22-13 MW POM LIMS ID: **Value** 0.7734 0.84 28.84 28.82030496 0.001816886 529.1 542.2 29.75 55 1.8 1 29.75 2160 1.58 1496.752 57.3 29.77 0.227 0.00028104710 4.5090 48.086 91.817

**Value** 1490.9533180 44.15093 -151.6 -7.13581 208.9 9.849635 0.001817 0.463622 95.8592 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**

**4-22-13 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: 4-22-13 MW POM LIMS ID: 0



### Value 3.9000 0.0039 1.8 0.0018 1490.953318 4.5090 89.06 29.75 17004 404.8151667 0.001816886 263441110.7 3.04 72.86 1.40 33.63



### Value **0.18 0.08**  **0.26** 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

**4-22-13 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) **0.26**

2 = conversion factor to account for two potrooms per potline 2 C s2 = concentration of POM as measured for roof vent emissions (mg/dscf) 0.003823 Q sd= volumetric flow rate of roof vent effluent gas (dscf/hr) 263,441,110.710 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) 0.0038

M MCEM= mass of methylene chlorine extractable matter in sample (mg) 5.7 V v = volume of roof vent sample gas (dscf) 1490.95



### 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) 263,441,111

528 = standard temperature (R) 528 vv = average velocity of roof vent effluent gas (ft/hr) 16,232 Pv = barometric pressure in the roof vent (in Hg) 29.75 A = area of potroom roof vent (ft2) 17,004 Md = mole fraction of dry gas 0.9982 Tv = roof vent temperature (°F) 89.06 460 = 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 Potline 3- April 27, 2013**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 27.2 0.0272 1490.9533 4.509 89.06 29.75 17004 404.81517 0.0018169 263441111

**Value** 21.17 508.13 1.26 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** 

**4-22-13 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) **1.26 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) 0.0182 mg/dscf Q sd= volumetric flow rate of roof vent effluent gas (dscf/hr) 263,441,111 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) 0.0182 mg/dscf

Mpart = mass of particulate in sample (mg) 27.2 mg V v = volume of roof vent sample gas (dscf) 1490.95 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) 263,441,111 dscf/hr

528 = standard temperature (R) 528 R vv = average velocity of roof vent effluent gas (ft/hr) 16,232 ft/hr Pv = barometric pressure in the roof vent (in Hg) 29.75 in Hg A = area of potroom roof vent (ft2) 17,004 ft2 Md = mole fraction of dry gas 0.9982 Tv = roof vent temperature (°F) 89.06 °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**