Where:
Eh = Total organic mass flow rate, kg/h;
Qsd = Volumetric flow rate of gases entering or exiting control device (or exiting the process vent if no control device is used), as determined by Method 2 of 40 CFR part 60, appendix A, dscm/h;
n = Number of organic compounds in the vent gas;
Ci = Organic concentration in ppm, dry basis, of compound i in the vent gas, as determined by Method 18 of 40 CFR part 60, appendix A;
MWi = Molecular weight of organic compound i in the vent gas,kg/kg-mol;
Where:
EA = Total organic mass emissions rate, kilograms per year;
Eh = Total organic mass flow rate for the process vent, kg/h;
H = Total annual hours of operation for the affected unit, h.
Where:
Cij, Coj = Concentration of sample component j of the gas stream at the inlet and outlet of the control device, dry basis, parts per million by volume. For uncontrolled vents, Cij = Coj and equal the concentration exiting the vent;
Ei, Eo = Mass rate of total organic compounds (TOC) (minus methane and ethane) or total HAP, from Table 1 of this subpart, at the inlet and outlet of the control device, respectively, dry basis, kilogram per hour. For uncontrolled vents, Ei = Eo and equal the concentration exiting the vent;
Mij, Moj = Molecular weight of sample component j of the gas stream at the inlet and outlet of the control device, respectively, gram/gram-mole. For uncontrolled vents, Mij = Moj and equal the gas stream molecular weight exiting the vent;
Qi, Qo = Flowrate of gas stream at the inlet and outlet of the control device, respectively, dry standard cubic meters per minute (dscm/min). For uncontrolled vents, Qi = Qo and equals the flowrate exiting the vent;
K2 = Constant, 2.494 * 10-6 (parts per million)-1 (gram-mole per standard cubic meter) (kilogram/gram)(minute/hour, where standard temperature (gram-mole per standard cubic meter) is 20 °C);
n = the number of components in the sample.
Where:
Rv = Overall emissions reduction for all affected process vents, percent
Ei = Mass rate of TOC (minus methane and ethane) or total HAP, from Table 1 of this subpart, at the inlet to the control device, or exiting the vent for uncontrolled vents, as calculated in this section, kilograms TOC per hour or kilograms HAP per hour;
Eo = Mass rate of TOC (minus methane and ethane) or total HAP, from Table 1 of this subpart, at the outlet to the control device, or exiting the vent for uncontrolled vents, as calculated in this section, kilograms TOC per hour or kilograms HAP per hour. For vents without a control device, Eo = Ei;
n = number of affected source process vents.
40 C.F.R. §63.7941