Sample ID: 3-2-10-MW TF Lab ID: 2010002094

Value

0.9203

0.84

28.84

28.80499721

0.00322904

541.515

527.38

29.279

63

2.808

1

29.279

2160

1.4456

1218.0856

79.8

28.882

0.1802

0.00017710750

4.972

53.023 Vd = Desired Velocity in stack for Isokinetic sampling

99.236

Value

1166.459577

52.6184805

-202.2

-9.517554

282

13.2963

0.00322904

100.256058

Air Test Calculations

Ratio of Vs/Vd*100 (Must be less than 120%)

Md = Stack gas dry molecular weight, (lb/lb-mole)

Ms = Stack gas (wet) molecular weight (lb/lb-mole)

Vr = Average Anemometer Velocity during test. (ft/s)

Ps = Absolute stack gas pressure (in Hg)

Nozzle diameter (in)

Area of Nozzle (ft^2)

Vlc Volume collected

Bws = fraction of gas that is moisture

I = % Isokinetic variation

Vm (std) = Volume of sample measured by DGM (dscf) 

Vs = Average stack gas velocity

Total impinger catch (ml)

Vwc (std) = converted water volume 

Total silica gel catch (ml)

Vwsg (std) = converted silica gel water volume 

Method 5 Parameter

 Potroom Roof Vent Emission Calculations Massena 

Operations West

Pm = Pressure at orifice meter (in. Hg)

Vm = Total sample volume from dry gas meter (dcf)

Total sampling time required for test (min)

Tm = Absolute average dry gas meter temp (R).

Ts = Stack gas absolute average temperature (R)

3-2-10 MW TF

Bws = Stack gas moisture content

p = Stack gas velocity pressure (avg. sqrt p - in. water)

Cp = Pitot tube calibration coefficient

Ta = Sampling site ambient temperature, (°F)

H@ = Orifice meter calibration factor, (in. water)

Y = Dry gas meter calibration factor

Pbar = Barometric pressure, (in. Hg)

Havg = average orifice meter differential

Form 36.4, Rev. 0 8/20/09

Page 1 of 3
Test ID: 3-2-10-MW TF Lab ID: 2010002094

Value

1870 Total ug of Fluoride in Gaseous Sample

0.00187 Total g of Fluoride in Gaseous Sample

3365 Total ug of Fluoride in Particulate Sample

0.003365 Total g of Fluoride in Particulate Sample

0.0257 Total g of Particulate Matter

1166.45958 Vm(std) Volume of Air Sampled by DGM (dscf)

3.39 Vr Velocity of Roof Vent Emissions During Test (mph)

4.972 Vr Velocity of Roof Vent Emissions During Test (ft/s)

22.28 Tr Average Temperature of Roof Vent During Test (°C)

72.104 Tr Average Temperature of Roof Vent During Test (°F)

29.279 Pbar Barometric Pressure During Test (in Hg)

17004

395.809694 Month Average Tons of Aluminum Produced per day 

0.00322904 Bws Moisture in Roof Emissions

294586027 Qstd Flow of Roof Vent Emissions (dscf/hr)

28.5923411 Emission Rate of Particulate Matter lb F/hr

686.216186 Emission Rate of Particulate Matter lb F/d

2.08 Emission Rate of Gaseous Fluoride lb F/hr

49.93 Emission Rate of Gaseous Fluoride lb F/d

3.74 Emission Rate of Particulate Fluoride lb F/hr

89.85 Emission Rate of Particulate Fluoride lb F/d

Value

1.73 1.835991

1.835991

0.13

0.23

0.35

0.37 Total Pounds of Fluoride per Ton of Aluminum Adjusted for Single Point 

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

Total Pounds of Fluoride from Roof Vents per Ton of Aluminum Produced (lb F/ton Al)

 Potroom Roof Vent Emission Calculations Massena 

Operations West

3-2-10 MW TF

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

Air Test Final Results

Combined Method 5 Parameter and Analytical

Pounds of Particulate Matter per Ton of Aluminum Produced (lb F/ton Al)

Area of Potroom Roof Vent (ft2)

Pounds of PM per Ton of Aluminum Produced (lb F/ton Al) Ajusted for Single Pt

Form 36.4 Rev.0, 8/20/09

Page 2 of 3
Ep

 = 2[(Cs2Qsd) / (PK)]

Value Units

where Ep = roof vent emission rate of TF from potline I (lb/ton Al) 0.35 lb/ton Al

0.37 lb/ton Al

Single Point Adjustment Factor 1.059

2 = conversion factor to account for two potrooms per potline 2

lbs of Fluoride/Hour corrected for single point 6.17 lb/hr

lbs of Fluoride/Hour 5.83 lb/Hr

Cs2 = concentration of TF as measured for roof vent emissions (mg/dscf) 0.00449 mg/dscf

Qsd = volumetric flow rate of roof vent effluent gas (dscf/hr) 294,586,027.0 dscf/hr

P = potline I aluminum production rate (ton/hr) 16.49 ton/hr

K = conversion factor (453,600 mg/lb) 453,600 mg/lb

Concentration of TF as Measured for Roof Vent Emissions

Cs2 = (MGF + MPF) / Vv

Value Units

where Cs2 = concentration of TF as measured for roof vent emissions (mg/dscf) 0.00449 mg/dscf

MGF = mass of gaseous fluoride in sample (mg) 1.87 mg

MPF = mass of particulate fluoride in sample (mg) 3.365 mg

Vv = volume of roof vent sample gas (dscf) 1166.46 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) 294,586,027 dscf/hr

528 = standard temperature (R) 528 R

vv = average velocity of roof vent effluent gas (ft/hr) 17,899 ft/hr

Pv = barometric pressure in the roof vent (in Hg) 29.279 in Hg

A = area of potroom roof vent (ft2) 17,004 ft2

Md = mole fraction of dry gas 0.9968

Tv = roof vent temperature (°F) 72.10 °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)(1) - TF Roof Vent Emissions from Potlines

Roof Vent Emission Rate of TF from Massena Operations West Potlines - March 2, 2010

Total Pounds of Fluoride per Ton of Aluminum Adjusted for Single Point 

Form 36.4 rev. 0, 8/20/09

Page 3 of 3