Ep = [(Cs Qsd)1 + (Cs Qsd)2]/(P K)
where:
Ep = emission rate of total fluorides from a potroom group, kg/Mg (lb/ton).
Cs = concentration of total fluorides, mg/dscm (gr/dscf).
Qsd = volumetric flow rate of effluent gas, dscm/hr (dscf/hr).
P = aluminum production rate, Mg/hr (ton/hr).
K = conversion factor, 106 mg/kg (7,000 gr/lb).
1 = subscript for primary control system effluent gas.
2 = subscript for secondary control system or roof monitor effluent gas.
Eb = (Cs Qsd)/(PeK)
where:
Eb = emission rate of total fluorides, kg/Mg (lb/ton) of aluminum equivalent.
Cs = concentration of total fluorides, mg/dscm (gr/dscf).
Qsd = volumetric flow rate of effluent gas, dscm/hr (dscf/hr).
Pe = aluminum equivalent for anode production rate, Mg/hr (ton/hr).
K = conversion factor, 106 mg/kg (7,000 gr/lb).
40 C.F.R. §60.195