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 v elocity Total impinger catch (ml) Vwc (std) = conv erted water v olume Total silica gel catch (ml) Vwsg (std) = conv erted silica gel water v olume



### 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 av erage temperature (R) 

# 3-2-10 MW TF

Bws = Stack gas moisture content  p = Stack gas v elocity pressure (av g. 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)

 Hav g = average orifice meter differential

Form 36.4, Rev. 0 8/20/09 Page 1 of 3Test 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 Av erage 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 W est 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 3E p= 2[(C s2 Q sd) / (PK)] Value Units wh ere E p= 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 C s2= concentration of TF as measured for roof vent emissions (mg/dscf) 0.00449 mg/dscf Q sd = 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

C s2= (M GF + MPF ) / Vv Value Units wh ere C s2= concentration of TF as measured for roof vent emissions (mg/dscf) 0.00449 mg/dscf

M GF= 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

Q sd = 3600 (1-B ws)Vv As (528/Ts) (Ps/29.92) Value Units wh ere Q sd

= volumetric flow rate of roof vent effluent gas (dscf/hr) 294,586,027 dscf/hr 528 = standard temperature (R) 528 R

v v = average velocity of roof vent effluent gas (ft/hr) 17,899 ft/hr P v = barometric pressure in the roof vent (in Hg) 29.279 in Hg A = area of potroom roof vent (ft2 ) 17,004 ft2
M d = mole fraction of dry

gas 0.9968 T v = 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 Em**

**ission 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