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 Weight 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 Weight of MCEM Impnger Water Extracted (g).

Volume of Acetone Used 3A (ml) Impinger (Back Half)

Volume of MC Used 3M (ml) (Impinger Back Half)

3M Weight of MCEM From Back Glassware Rinses (g)

3M Net of MCEM Adjusted from Blanks (g)

MCEM Analysis Calculations

Potroom Roof Vent Emission Calculations MW

3WB Weight of MCEM From Extracted DI Water Blank (g)

3W Net of Extracted Water Adjusted from Blank (g)

Total mg of Gaseous MCEM

Volume of Deionized Water Used 3W (ml)

Volume of Deionized Water Used in Blank (ml) 

2M Net MCEM Adjusted from Blank (g) Front Half Rinses

4A Weight of Acetone Blank (g)

4M Weight of MC Blank (g)

4-24-13 MW POM

MCEM Analysis Data

1A Filter Weight (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 Average 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 Results
Ep

 = 2[(Cs2Qsd) / (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

Cs2 = concentration of POM as measured for roof vent emissions (mg/dscf) 0.002721

Qsd = 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

Cs2 = MMCEM / Vv

Value

where Cs2 = concentration of POM as measured for roof vent emissions (mg/dscf) 0.0027

MMCEM = mass of methylene chlorine extractable matter in sample (mg) 4.3

Vv = 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

tion 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[(Cs2Qsd) / (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

Cs2 = concentration of Particulate as measured for roof vent emissions (mg/dscf) 0.0323 mg/dscf

Qsd = 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

Cs2 = MPART / Vv

Value Units

where Cs2 = concentration of Particulate as measured for roof vent emissions (mg/dscf) 0.0323 mg/dscf

Mpart = mass of particulate in sample (mg) 51 mg

Vv = 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