CTOC is the concentration of TOC (minus methane and ethane), dry basis, ppm by volume
%O2d is the concentration of O2, dry basis, percent by volume
NR 440.675(5)(b)4.4. Method 18 to determine concentration of TOC in the control device outlet and the concentration of TOC in the inlet when the reduction efficiency of the control device is to be determined. NR 440.675(5)(b)4.a.a. The sampling time for each run shall be 1 hour in which either an integrated sample or 4 grab samples shall be taken. If grab sampling is used then the samples shall be taken at 15-minute intervals. NR 440.675(5)(b)4.b.b. The emission reduction (R) of TOC (minus methane and ethane) shall be determined using the following equation: where:
R is the emission reduction, percent by weight
Ei is the mass rate of TOC entering the control device, kg/hr (lb/hr)
Eo is the mass rate of TOC discharged to the atmosphere, kg/hr (lb/hr)
NR 440.675(5)(b)4.c.c. The mass rates of TOC (Ei , Eo) shall be computed using the following equations: where:
Cij and Coj are the 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 and Moj are the 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 and Qo are the flow rate of gas stream at the inlet and outlet of the control device, respectively, dscm/min (dscf/min)
K2 is a constant, 2.494 x 10-6 (1/ppm)(g-mole/scm)(kg/g)(min/hr) for metric units, where standard temperature for (g-mole/scm) is 20°C, and 1.557 x 10-7 (1/ppm)(lb-mole/scf)(min/hr) for English units, where standard temperature for (lb-mole/scf) is 68°F
NR 440.675(5)(b)4.d.d. The TOC concentration (CTOC) is the sum of the individual components and shall be computed for each run using the following equation: where:
CTOC is the concentration of TOC (minus methane and ethane), dry basis, ppm by volume
Cj is the concentration of sample components in the sample
n is the number of components in the sample
NR 440.675(5)(c)(c) When a boiler or process heater with a design heat input capacity of 44 MW (150 million Btu/hour) or greater is used to seek to comply with sub. (3) (a), the requirement for an initial performance test is waived, in accordance with s. NR 440.08 (2). However, the department reserves the option to require testing at such other times as may be required. NR 440.675(5)(e)(e) The following test methods in Appendix A of 40 CFR part 60, incorporated by reference in s. NR 440.17, except as provided under s. NR 440.08 (2), shall be used for determining the net heating value of the gas combusted to determine compliance under sub. (3) (b) and for determining the process vent stream TRE index value to determine compliance under sub. (3) (c). NR 440.675(5)(e)1.1. Method 1 or 1A, as appropriate, for selection of the sampling site. The sampling site for the vent stream flow rate and molar composition determination prescribed in subds. 3. and 4. shall be, except for the situations outlined in subd. 2., prior to the inlet of any control device, prior to any post-reactor dilution of the stream with air and prior to any post-reactor introduction of halogenated compounds into the vent stream. No transverse site selection method is needed for vents smaller than 10 centimeters (4 inches) in diameter. NR 440.675(5)(e)2.2. If any gas stream other than the air oxidation vent stream from the affected facility is normally conducted through the final recovery device: NR 440.675(5)(e)2.a.a. The sampling site for vent stream flow rate and molar composition shall be prior to the final recovery device and prior to the point at which the nonair oxidation stream is introduced. NR 440.675(5)(e)2.b.b. The efficiency of the final recovery device is determined by measuring the TOC concentration using Method 18 at the inlet to the final recovery device after the introduction of any nonair oxidation vent stream and at the outlet of the final recovery device. NR 440.675(5)(e)2.c.c. This efficiency is applied to the TOC concentration measured prior to the final recovery device and prior to the introduction of the nonair oxidation stream to determine the concentration of TOC in the air oxidation stream from the final recovery device. This concentration of TOC is then used to perform the calculations outlined in subds. 5. and 6. NR 440.675(5)(e)3.3. The molar composition of the process vent stream shall be determined as follows: NR 440.675(5)(e)3.a.a. Method 18 to measure the concentration of TOC including those containing halogens. NR 440.675(5)(e)4.4. The volumetric flow rate shall be determined using Method 2, 2A, 2C or 2D, as appropriate. NR 440.675(5)(e)5.5. The net heating value of the vent stream shall be calculated using the following equation: where:
HT is the 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 is a constant, 1.740 x 10-7 (1/ppm)(g-mole/scm)(MJ/kcal) for metric units where standard temperature for (g-mole/scm) is 20°C, and 1.03 x 10-11 (1/ppm)(lb-mole/scf)(Btu/kcal) for English units where standard temperature for (lb-mole/scf) is 68°F
Cj is the concentration on a wet basis of compound j in ppm, as measured for organics by Method 18 and measured for hydrogen and carbon monoxide by ASTM D1946-90 (reapproved 1994), incorporated by reference in s. NR 440.17 (2) (a) 24., as indicated in subd. 3. Hj is the 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). The heats of combustion of vent stream components would be required to be determined using ASTM D2382-88 or D4809-95, incorporated by reference as specified in s. NR 440.17 (2) (a) 30. and 61., if published values are not available or cannot be calculated NR 440.675(5)(e)6.6. The emission rate of TOC in the process vent stream shall be calculated using the following equation: where:
ETOC is the emission rate of TOC in the sample, kg/hr (lb/hr)
K2 is the constant, 2.494 ×10-6 (1/ppm) (g-mole/scm) (kg/g) (min/hr) for metric units, where standard temperature for (g-mole/scm) is 20°C, and 1.557 x 10-7 (1/ppm)(lb-mole/scf)(min/hr) for English units, where standard temperature for (lb-mole/scf) is 68°F
Cj is the concentration on a wet basis of compound j in ppm as measured by Method 18 as indicated in subd. 3.
Mj is the molecular weight of sample j, g/g-mole (lb/lb-mole)
Qs is the vent stream flow rate (scm/min) (scf/hr) at a standard temperature of 20°C (68°F)
NR 440.675(5)(e)7.7. The total process vent stream concentration (by volume) of compounds containing halogens (ppmv, by compound) shall be summed from the individual concentrations of compounds containing halogens which were measured by Method 18. NR 440.675(5)(f)(f) For purposes of complying with sub. (3) (c), the owner or operator of a facility affected by this section shall calculate the TRE index value of the vent stream using the equation for incineration in subd. 1. for halogenated vent streams. The owner or operator of an affected facility with a nonhalogenated vent stream shall determine the TRE index value by calculating values using both the incinerator equation in subd. 1. and the flare equation in subd. 2. and selecting the lower of the 2 values. NR 440.675(5)(f)1.1. The TRE index value of the vent stream controlled by an incinerator shall be calculated using the following equation: NR 440.675(5)(f)1.a.a. Where for a vent stream flow rate that is greater than or equal to 14.2 scm/min (501 scf/min) at a standard temperature of 20°C (68°F): TRE is the TRE index value
Qs is the vent stream flow rate scm/min (scf/min), at a standard temperature of 20°C (68°F)
HT is the 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 = (Qs) (HT)/3.6 for metric units and Ys = (Qs)(HT)/97 for English units
ETOC is the hourly emissions of TOC, kg/hr (lb/hr)
a, b, c, d, e and f are coefficients
The set of coefficients which apply to a vent stream shall be obtained from Table 1.
NR 440.675(5)(f)1.b.b. Where for a vent stream flow rate that is less than 14.2 scm/min (501 scf/min) at a standard temperature of 20°C (68°F): TRE is the TRE index value
Qs is 14.2 scm/min (501 scf/min)
HT is (FLOW) (HVAL) / Qs
where the following inputs are used:
FLOW is the vent stream flow rate (scm/min) (scf/min), at a standard temperature of 20°C (68°F)
HVAL is the 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 (77°F and 30 in Hg), but the standard temperature for determining the volume corresponding to 1 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 for metric units and Ys = QsHT/97 for English units.
ETOC is the hourly emissions of TOC reported in kg/hr (lb/hr)
a,b,c,d,e and f are coefficients
The set of coefficients that apply to a vent stream shall be obtained from Table 1.
NR 440.675(5)(f)2.2. The equation for calculating the TRE index value of a vent stream controlled by a flare is as follows: where:
TRE is the TRE index value
ETOC is the hourly emissions of TOC, kg/hr (lb/hr)
Qs is the vent stream flow rate, scm/min (scf/min) at a standard temperature of 20°C (68°F)
HT is the 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 (77°F and 30 in Hg), but the standard temperature for determining the volume corresponding to 1 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.
NR 440.675(5)(g)(g) Each owner or operator of an affected facility seeking to comply with sub. (1) (c) or (3) (c) shall recalculate the TRE index value for that affected facility whenever process changes are made. Some examples of process changes are changes in production capacity, feedstock type or catalyst type or whenever there is replacement, removal or addition of recovery equipment. The TRE index value shall be recalculated based on test data or on best engineering estimates of the effects of the change to the recovery system. NR 440.675(5)(g)1.1. Where the recalculated TRE index value is less than or equal to 1.0, the owner or operator shall notify the department within 1 week of the recalculation and shall conduct a performance test according to the methods and procedures required by sub. (5) to determine compliance with sub. (3) (a). Performance tests shall be conducted as soon as possible after the process change but no later than 180 days from the time of the process change. NR 440.675(5)(g)2.2. Where the initial TRE index value is greater than 4.0 and the recalculated TRE index value is less than or equal to 4.0, but greater than 1.0, the owner or operator shall conduct a performance test in accordance with s. NR 440.08 and this subsection, and shall comply with subs. (4) and (6) and this subsection. Performance tests shall be conducted as soon as possible after the process change but no later than 180 days from the time of the process change. NR 440.675(6)(a)(a) Each owner or operator subject to sub. (3) shall notify the department of the specific provisions of sub. (3) with which the owner or operator has elected to comply. Notification shall be submitted with the notification of initial startup required by s. NR 440.07 (1) (c). If an owner or operator elects at a later date to use an alternative provision of sub. (3) with which he or she will comply, then the department shall be notified by the owner or operator 90 days before implementing a change and, upon implementing the change, a performance test shall be performed as specified by sub. (5) within 180 days.
