Ca = the VOC concentration in each gas stream leaving the control device and entering the atmosphere (parts per million as carbon)
Cb = the VOC concentration in each gas stream entering the control device (parts per million as carbon)
Dc = density of each coating, as received (kilograms per liter)
Dd = density of each VOC-solvent added to coatings (kilograms per liter)
Dr = density of VOC-solvent recovered by an emission control device (kilograms per liter)
E = VOC destruction efficiency of the control device (fraction)
F = the proportion of total VOC emitted by an affected facility which enters the control device to total emissions (fraction)
G = the volume-weighted average of VOC in coatings consumed in a calendar month per volume of coating solids applied (kilograms per liter of coating solids)
He = the fraction of VOC emitted at the coater and flashoff areas captured by a collection system
Hh = the fraction of VOC emitted at the cure oven captured by a collection system
Lc = the volume of each coating consumed, as received (liters)
Ld = the volume of each VOC-solvent added to coatings (liters)
Lr = the volume of VOC-solvent recovered by an emission control device (liters)
Ls = the volume of coating solids consumed (liters)
Md = the mass of VOC-solvent added to coatings (kilograms)
Mo = the mass of VOC-solvent in coatings consumed, as received (kilograms)
Mr = the mass of VOC-solvent recovered by emission control device (kilograms)
N = the volume-weighted average mass of VOC emissions to atmosphere per unit volume of coating solids applied (kilograms per liter of coating solids)
Qa = the volumetric flow rate of each gas stream leaving the control device and entering the atmosphere (dry standard cubic meters per hour)
Qb = the volumetric flow of each gas stream entering the control device (dry standard cubic meters per hour)
R = the overall emission reduction efficiency for an affected facility (fraction)
Se = the fraction of VOC in coating and diluent VOC-solvent emitted at the coater and flashoff area for a coating operation
Sh = the fraction of VOC in coating and diluent solvent emitted at the cure oven for a coating operation
Vs = the proportion of solids in each coating, as received (fraction by volume)
Wo = the proportion of VOC in each coating, as received (fraction by weight).
40 C.F.R. §60.491