Where:
Ep = emission rate of TF, POM, PM, nickel or arsenic from a potline, kg/Mg (lb/ton) (or [MICRO]g TEQ/ton for PCB);
Cs1 = concentration of TF, POM, PM, nickel or arsenic from the primary control system, mg/dscm (mg/dscf) (or [MICRO]g TEQ/dscf for PCB);
Qsd = volumetric flow rate of effluent gas corresponding to the appropriate subscript location, dscm/hr (dscf/hr);
Cs2 = concentration of TF, POM, PM, nickel or arsenic as measured for roof monitor emissions, mg/dscm (mg/dscf) (or [MICRO]g TEQ/dscf for PCB);
P = aluminum production rate, Mg/hr (ton/hr);
K = conversion factor, 106 mg/kg (453,600 mg/lb) for TF, POM, PM, nickel or arsenic (= 1 for PCB);
1 = subscript for primary control system effluent gas; and
2 = subscript for secondary control system or roof monitor effluent gas.
Where:
Eb = emission rate of TF, POM or PM, kg/mg (lb/ton) of green anodes;
Cs = concentration of TF, POM or PM, mg/dscm (mg/dscf);
Qsd = volumetric flow rate of effluent gas, dscm/hr (dscf/hr);
Pb = quantity of green anode material placed in the furnace, mg/hr (ton/hr); and
K = conversion factor, 106 mg/kg (453,600 mg/lb).
Where:
EPMpp = emission rate of PM, kg/mg (lb/ton) of green anode material exiting the paste production plant;
Cs = concentration of PM, mg/dscm (mg/dscf);
Qsd = volumetric flow rate of effluent gas, dscm/hr (dscf/hr);
Pb = quantity of green anode material exiting the paste production plant, mg/hr (ton/hr); and
K = conversion factor, 106 mg/kg (453,600 mg/lb).
Where:
ECOS = the emission rate of COS during the calendar month, pounds per ton of aluminum produced;
K = factor accounting for molecular weights and conversion of sulfur to carbonyl sulfide = 234;
Y = the mass of anode consumed in the potline during the calendar month, tons;
Z = the mass of aluminum produced by the potline during the calendar month, tons; and
S = the weighted average fraction of sulfur in the anode coke consumed in the production of aluminum during the calendar month (e.g., if the weighted average sulfur content of the anode coke consumed during the calendar month was 2.5 percent, then S = 0.025). The weight of anode coke used during the calendar month of each different concentration of sulfur is used to calculate the overall weighted average fraction of sulfur.
Compliance is demonstrated if the calculated value of ECOS is less than the applicable standard for COS emissions in §§ 63.843(e) and 63.844(e) .
40 C.F.R. §63.847