Where:
Eg = Monthly production-weighted average mercury emission rate for month "g" for the group of indurating furnaces, lb/LT of pellets produced,
Ef = Average mercury emission rate for furnace "f", as determined using either mercury CEMS data or the emission rate determined during the last compliance stack test and calculated using Equation 5 of § 63.9621(d)(7)(i) , lb/LT of pellets produced,
Pf = Total monthly production of finished taconite pellets for furnace "f", in LT, and
n = Number of furnaces in the averaging group.
Where:
Eavg = 12-month rolling average emission rate, lb/LT.
Ei = Monthly weighted average for month "i" calculated as shown in Equation 6 of this section.
40 C.F.R. §63.9634