Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR Figure 1 to Subpart G of Part 63: Figure 1 to Subpart G of Part 63—Definitions of Terms Used in Wastewater Equations

Main Terms
AMR = Actual mass removal of Table 8 and/or Table 9 compounds achieved by treatment process or a series of treatment processes, kg/hr.
C = Concentration of Table 8 and/or Table 9 compounds in wastewater, ppmw.
CG = Concentration of TOC (minus methane and ethane) or total organic hazardous air pollutants, in vented gas stream, dry basis, ppmv.
CGc = Concentration of TOC or organic hazardous air pollutants corrected to 3-percent oxygen, in vented gas stream, dry basis, ppmv.
CGS = Concentration of sample compounds in vented gas stream, dry basis, ppmv.
E = Removal or destruction efficiency, percent.
Fbio = Site-specific fraction of Table 8 and/or Table 9 compounds biodegraded, unitless.
f bio = Site-specific fraction of an individual Table 8 or Table 9 compound biodegraded, unitless.
Fm = Compound-specific fraction measured factor, unitless (listed in table 34).
Fr = Fraction removal value for Table 8 and/or Table 9 compounds, unitless (listed in Table 9).
Fravg = Flow-weighted average of the Fr values.
i = Identifier for a compound.
j = Identifier for a sample.
k = Identifier for a run.
K2 = Constant, 41.57 * 10−9, (ppm)−1 (gram-mole per standard m 3) (kg/g), where standard temperature (gram-mole per standard m 3) is 20 °C.
m = Number of samples.
M = Mass, kg.
MW = Molecular weight, kg/kg-mole.
n = Number of compounds.
p = Number of runs.
%O2d = Concentration of oxygen, dry basis, percent by volume.
Q = Volumetric flowrate of wastewater, m 3/hr.
QG = Volumetric flow rate of vented gas stream, dry standard, m 3/min.
QMG = Mass flowrate of TOC (minus methane and ethane) or organic hazardous air pollutants, in vented gas stream, kg/hr.
QMW = Mass flowrate of Table 8 and/or Table 9 compounds in wastewater, kg/hr.
ρ = Density, kg/m 3.
RMR = Required mass removal achieved by treatment process or a series of treatment processes, kg/hr.
tT = Total time of all runs, hr.
Subscripts
a = Entering.
b = Exiting.
i = Identifier for a compound.
j = Identifier for a sample.
k = Identifier for a run.
m = Number of samples.
n = Number of compounds.
p = Number of runs.
T = Total; sum of individual.

Where this section sits in the code

Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER C—AIR PROGRAMS
PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES
Subpart G—National Emission Standards for Hazardous Air Pollutants From the Synthetic Organic Chemical Manufacturing Industry for Process Vents, Storage Vessels, Transfer Operations, and Wastewater

Main Terms

AMR = Actual mass removal of Table 8 and/or Table 9 compounds achieved by treatment process or a series of treatment processes, kg/hr.

C = Concentration of Table 8 and/or Table 9 compounds in wastewater, ppmw.

CG = Concentration of TOC (minus methane and ethane) or total organic hazardous air pollutants, in vented gas stream, dry basis, ppmv.

CGc = Concentration of TOC or organic hazardous air pollutants corrected to 3-percent oxygen, in vented gas stream, dry basis, ppmv.

CGS = Concentration of sample compounds in vented gas stream, dry basis, ppmv.

E = Removal or destruction efficiency, percent.

Fbio = Site-specific fraction of Table 8 and/or Table 9 compounds biodegraded, unitless.

f bio = Site-specific fraction of an individual Table 8 or Table 9 compound biodegraded, unitless.

Fm = Compound-specific fraction measured factor, unitless (listed in table 34).

Fr = Fraction removal value for Table 8 and/or Table 9 compounds, unitless (listed in Table 9).

Fravg = Flow-weighted average of the Fr values.

i = Identifier for a compound.

j = Identifier for a sample.

k = Identifier for a run.

K2 = Constant, 41.57 * 10−9, (ppm)−1 (gram-mole per standard m 3) (kg/g), where standard temperature (gram-mole per standard m 3) is 20 °C.

m = Number of samples.

M = Mass, kg.

MW = Molecular weight, kg/kg-mole.

n = Number of compounds.

p = Number of runs.

%O2d = Concentration of oxygen, dry basis, percent by volume.

Q = Volumetric flowrate of wastewater, m 3/hr.

QG = Volumetric flow rate of vented gas stream, dry standard, m 3/min.

QMG = Mass flowrate of TOC (minus methane and ethane) or organic hazardous air pollutants, in vented gas stream, kg/hr.

QMW = Mass flowrate of Table 8 and/or Table 9 compounds in wastewater, kg/hr.

ρ = Density, kg/m 3.

RMR = Required mass removal achieved by treatment process or a series of treatment processes, kg/hr.

tT = Total time of all runs, hr.

Subscripts

a = Entering.

b = Exiting.

i = Identifier for a compound.

j = Identifier for a sample.

k = Identifier for a run.

m = Number of samples.

n = Number of compounds.

p = Number of runs.

T = Total; sum of individual.

Collected 2026-08-27T02:26:04Z. Source file · JSON

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