Where:
E = Emission rate of PM, pounds per ton (lb/ton) of stone feed.
Ck = Concentration of PM in the kiln effluent, grain/dry standard cubic feet (gr/dscf).
Qk = Volumetric flow rate of kiln effluent gas, dry standard cubic feet per hour (dscf/hr).
Cc = Concentration of PM in the cooler effluent, grain/dscf. This value is zero if there is not a separate cooler exhaust to the atmosphere.
Qc = Volumetric flow rate of cooler effluent gas, dscf/hr. This value is zero if there is not a separate cooler exhaust to the atmosphere.
P = Stone feed rate, tons per hour (ton/hr).
K = Conversion factor, 7000 grains per pound (grains/lb).
Where:
ET = Emission rate of PM from all kilns and coolers, lb/ton of stone feed.
Ei = Emission rate of PM from kiln i, or from kiln/cooler combination i, lb/ton of stone feed.
Pi = Stone feed rate to kiln i, ton/hr.
n = Number of kilns you wish to include in averaging.
Where:
ETN = Weighted average PM emission limit for all kilns and coolers being included in averaging at the LMP, lb/ton of stone feed.
Ej = PM emission limit (0.10 or 0.12) for kiln j, or for kiln/cooler combination j, lb/ton of stone feed.
Pj = Stone feed rate to kiln j, ton/hr.
m = Number of kilns and kiln/cooler combinations you are averaging at your LMP. You must include the same kilns in the calculation of ET and ETN. Kilns that have a PM emission limit of 0.60 lb/tsf are ineligible for any averaging.
40 C.F.R. §63.7112