The TOC concentration corrected to 3 percent 02 (Cc) shall be computed using the following equation:
where:
Cc = Concentration of TOC corrected to 3 percent O2, dry basis, ppm by volume.
CTOC = Concentration of TOC (minus methane and ethane), dry basis, ppm by volume.
%O2d = Concentration of O2, dry basis, percent by volume.
where:
R = Emission reduction, percent by weight.
Ei = Mass rate of TOC entering the control device, kg/hr (lb/hr).
Eo = Mass rate of TOC discharged to the atmosphere, kg/hr (lb/hr).
where:
Cij, Coj = Concentration of sample component "j" of the gas stream at the inlet and outlet of the control device, respectively, dry basis, ppm by volume.
Mij, Moj = Molecular weight of sample component "j" of the gas stream at the inlet and outlet of the control device, respectively, g/g-mole (lb/lb-mole).
Qi, Qo = Flow rate of gas stream at the inlet and outlet of the control device, respectively, dscm/min (dscf/min).
K2 = 2.494 * 10-6 (1/ppm)(g-mole/scm) (kg/g) (min/hr) (metric units), where standard temperature for (g-mole/scm) is 20 °C.
= 1.557 * 10-7 (1/ppm) (lb-mole/scf) (min/hr) (English units), where standard temperature for (lb-mole/scf) is 68 °F.
where:
CTOC = Concentration of TOC (minus methane and ethane), dry basis, ppm by volume.
Cj = Concentration of sample components "j", dry basis, ppm by volume.
n = Number of components in the sample.
Where:
HT = Net heating value of the sample, MJ/scm (Btu/scf), where the net enthalpy per mole of vent stream is based on combustion at 25 °C and 760 mm Hg (77 °F and 30 in. Hg), but the standard temperature for determining the volume corresponding to one mole is 20 °C (68 °F).
K1 = 1.74 * 10-7 (1/ppm) (g-mole/scm) (MJ/kcal) (metric units), where standard temperature for (g-mole/scm) is 20 °C.
= 1.03 * 10-11 (1/ppm) (lb-mole/scf) (Btu/kcal) (English units) where standard temperature for (lb/mole/scf) is 68 °F.
Cj = Concentration on a wet basis of compound j in ppm, as measured for organics by Method 18 of appendix A-6 to this part, or ASTM D6420-18 (incorporated by reference, see § 60.17 ) as specified in paragraph (b)(4) of this section, and measured for hydrogen and carbon monoxide by ASTM D1946-77 or 90 (Reapproved 1994) (incorporated by reference, see § 60.17 ) as indicated in paragraph (e)(2) of this section.
Hj = Net heat of combustion of compound j, kcal/(g-mole) [kcal/(lb-mole)], based on combustion at 25 °C and 760 mm Hg (77 °F and 30 in. Hg).
Where:
ETOC = Measured emission rate of TOC, kg/hr (lb/hr).
K2 = 2.494 * 10-6 (1/ppm) (g-mole/scm) (kg/g) (min/hr) (metric units), where standard temperature for (g-mole/scm) is 20 °C.
= 1.557 * 10-7 (1/ppm) (lb-mole/scf) (min/hr) (English units), where standard temperature for (lb-mole/scf) is 68 °F.
Cj = Concentration on a wet basis of compound j in ppm, as measured by Method 18 of appendix A-6 to this part, or ASTM D6420-18 (incorporated by reference, see § 60.17 ) as specified in paragraph (b)(4) of this section, as indicated in paragraph (e)(2) of this section.
Mj = Molecular weight of sample j, g/g-mole (lb/lb-mole).
Qs = Vent stream flow rate, scm/min (scf/min), at a temperature of 20 °C (68 °F).
TRE = TRE index value.
Qs = Vent stream flow rate, scm/min (scf/min), at a temperature of 20 °C (68 °F).
HT = Vent stream net heating value, MJ/scm (Btu/scf), where the net enthalpy per mole of vent stream is based on combustion at 25 °C and 760 mm Hg (68 °F and 30 in. Hg), but the standard temperature for determining the volume corresponding to one mole is 20 °C (68 °F) as in the definition of Qs.
Ys = Qs for all vent stream categories listed in table 1 except for Category E vent streams where Ys = QsHT/3.6.
ETOC = Hourly emissions of TOC, kg/hr (lb/hr).
a, b, c, d, e, and f are coefficients.
The set of coefficients that apply to a vent stream can be obtained from table 1.
TRE = TRE index value.
Qs = 14.2 scm/min (501 scf/min).
HT = (FLOW) (HVAL)/Qs.
Where the following inputs are used:
FLOW = Vent stream flow rate, scm/min (scf/min), at a temperature of 20 °C (68 °F).
HVAL = Vent stream net heating value, MJ/scm (Btu/scf), where the net enthalpy per mole of vent stream is based on combustion at 25 °C and 760 mm Hg (68 °F and 30 in. Hg), but the standard temperature for determining the volume corresponding to one mole is 20 °C (68 °F) as in the definition of Qs.
Ys = Qs for all vent stream categories listed in table 1 except for Category E vent streams where Ys = QsHT/3.6.
ETOC = Hourly emissions of TOC, kg/hr (lb/hr).
a, b, c, d, e, and f are coefficients
The set of coefficients that apply to a vent stream can be obtained from table 1.
where:
TRE = TRE index value.
ETOC = Hourly emissions of TOC, kg/hr (lb/hr).
Qs = Vent stream flow rate, scm/min (scf/min), at a standard temperature of 20 °C (68 °F).
HT = Vent stream net heating value, MJ/scm (Btu/scf), where the net enthalpy per mole of vent stream is based on combustion at 25 °C and 760 mm Hg (68 °F and 30 in. Hg), but the standard temperature for determining the volume corresponding to one mole is 20 °C (68 °F) as in the definition of Qs.
a, b, c, d, and e are coefficients.
The set of coefficients that apply to a vent stream shall be obtained from table 2.
Table 2-Distillation NSPS TRE Coefficients for Vent Streams Controlled By a Flare
a | b | c | d | e | |
HT [LESS THAN] 11.2 MJ/scm | 2.25 | 0.288 | -0.193 | -0.0051 | 2.08 |
(HT [LESS THAN] 301 Btu/scf) | (0.140) | (0.0367) | (-0.000448) | (-0.0051) | (4.59) |
HT [GREATER THAN EQUAL TO] 11.2 MJ/scm | 0.309 | 0.0619 | -0.0043 | -0.0034 | 2.08 |
(HT [GREATER THAN EQUAL TO] 301 Btu/scf) | (0.0193) | (0.00788) | (-0.0000010) | (-0.0034) | (4.59) |
40 C.F.R. §60.664