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 (dcsf/min)
K2 is a 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
where:
CTOC is the concentration of TOC (minus methane and ethane), dry basis, ppm by volume
Cj is the concentration of sample components “j", dry basis, ppm by volume
n is the number of components in the sample
NR 440.686(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 440.686(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 440.686(5)(e)1.a.a. Method 1 or 1A, as appropriate, shall be used for selection of the sampling site. The sampling site for the vent stream flow rate and molar composition determination prescribed in
subds. 2. and
3. shall be, except for the situations outlined in
subd. 1. b., prior to the inlet of any control device, prior to any post-distillation dilution of the stream with air and prior to any post-distillation introduction of halogenated compounds into the process vent stream. No transverse site selection method is needed for vents smaller than 10 centimeters (4 inches) in diameter.
NR 440.686(5)(e)1.b.
b. If any gas stream other than the distillation vent stream from the affected facility is normally conducted through the final recovery device then all of the following apply:
1) 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 nondistillation stream is introduced.
2) 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 nondistillation vent stream at the outlet of the final recovery device.
3) This efficiency is applied to the TOC concentration measured prior to the final recovery device and prior to the introduction of the nondistillation stream to determine the concentration of TOC in the distillation vent stream from the final recovery device. This concentration of TOC is then used to perform the calculations outlined in subds. 4. and 5.
NR 440.686(5)(e)2.
2. The molar composition of the process vent stream shall be determined as follows:
NR 440.686(5)(e)2.a.
a. Method 18 to measure the concentration of TOC including those containing halogens.
NR 440.686(5)(e)3.
3. The volumetric flow rate shall be determined using Method 2, 2A, 2C or 2D, as appropriate.
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
C
j 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. 2.
H
j 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.
The heats of combustion of vent stream components would be required to be determined using ASTM D2382-76, incorporated by reference as specified in
s. NR 440.17, if published values are not available or cannot be calculated.
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. 2.
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 temperature of 20°C (68°F)
NR 440.686(5)(e)6.
6. 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 440.686(5)(f)
(f) For purpose 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 440.686(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)
NR 440.686(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 = 14.2 scm/min (501 scf/min)
HT = (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 one mole is 20°C (68°F) as in the definition of Qs
Ys is equal to Qs for all vent stream categories listed in Table 1 except for Category E vent streams, where Ys = QsH
T/3.6 for metric units and Ys = QsH
T/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.
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 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.
-
See PDF for table 
NR 440.686(5)(g)
(g) Each owner or operator of an affected facility seeking to comply with
sub. (1) (c) 4. or
(3) (c) shall recalculate the TRE index value for that affected facility whenever process changes are made. Examples of process changes include 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 440.686(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 one week of the recalculation and shall conduct a performance test according to the methods and procedures required by this subsection in order 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 440.686(5)(g)2.
2. Where the initial TRE index value is greater than 8.0 and the recalculated TRE index value is less than or equal to 8.0 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 440.686(5)(h)
(h) Any owner or operator subject to the provisions of this section seeking to demonstrate compliance with
sub. (1) (c) 6. shall use Method 2, 2A, 2C or 2D as appropriate, for determination of volumetric flow rate.
NR 440.686(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 within 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.
NR 440.686(6)(b)
(b) Each owner or operator subject to the provisions of this section shall keep an up-to-date, readily accessible record of the following data measured during each performance test and also include the following data in the report of the initial performance test required under
s. NR 440.08. Where a boiler or process heater with a design heat input capacity of 44 MW (150 million Btu/hour) or greater is used to comply with
sub. (3) (a), a report containing performance test data need not be submitted but a report containing the information in
subd. 2. a. is required. The same data specified in this subsection shall be submitted in the reports of all subsequently required performance tests where either the emission control efficiency of a control device, outlet concentration of TOC or the TRE index value of a vent stream from a recovery system is determined.
NR 440.686(6)(b)1.
1. Where an owner or operator subject to the provisions of this section seeks to demonstrate compliance with
sub. (3) (a) through use of either a thermal or catalytic incinerator:
NR 440.686(6)(b)1.a.
a. The average firebox temperature of the incinerator, or the average temperature upstream and downstream of the catalyst bed for a catalytic incinerator, measured at least every 15 minutes and averaged over the same time period of the performance testing and
NR 440.686(6)(b)1.b.
b. The percent reduction of TOC determined as specified in
sub. (5) (b) achieved by the incinerator or the concentration of TOC (ppmv, by compound) determined as specified in
sub. (5) (b) at the outlet of the control device on a dry basis corrected to 3% oxygen.
NR 440.686(6)(b)2.
2. Where an owner or operator subject to the provisions of this section seeks to demonstrate compliance with
sub. (3) (a) through use of a boiler or process heater:
NR 440.686(6)(b)2.a.
a. A description of the location at which the vent stream is introduced into the boiler or process heater, and
NR 440.686(6)(b)2.b.
b. The average combustion temperature of the boiler or process heater with a design heat input capacity of less than 44 MW (150 million Btu/hr) measured at least every 15 minutes and averaged over the same time period of the performance testing.
NR 440.686(6)(b)3.
3. Where an owner or operator subject to the provisions of this section seeks to demonstrate compliance with
sub. (3) (b) through use of a smokeless flare, flare design, that is, steam-assisted, air-assisted or nonassisted, all visible emission readings, heat content determinations, flow rate measurements and exit velocity determinations made during the performance test, continuous records of the flare pilot flame monitoring and records of all periods of operations during which the pilot flame is absent.
NR 440.686(6)(b)4.
4. Where an owner or operator subject to the provisions of this section seeks to demonstrate compliance with
sub. (3) (c):
NR 440.686(6)(b)4.a.
a. Where an absorber is the final recovery device in the recovery system, the exit specific gravity, or alternative parameter which is a measure of the degree of absorbing liquid saturation, if approved by the department, and average exit temperature, of the adsorbing liquid measured at least every 15 minutes and averaged over the same time period of the performance testing, both measured while the vent stream is normally routed and constituted; or
NR 440.686(6)(b)4.b.
b. Where a condenser is the final recovery device in the recovery system, the average exit (product side) temperature measured at least every 15 minutes and averaged over the same time period of the performance testing while the vent stream is routed and constituted normally; or
NR 440.686(6)(b)4.c.
c. Where a carbon adsorber is the final recovery device in the recovery system, the total steam mass flow measured at least every 15 minutes and averaged over the same time period of the performance test (full carbon bed cycle), temperature of the carbon bed after regeneration, and within 15 minutes of completion of any cooling cycle, and duration of the carbon bed steaming cycle, all measured while the vent stream is routed and constituted normally; or
NR 440.686(6)(b)4.d.
d. As an alternative to
subd. 4. a.,
b. or
c., the concentration level or reading indicated by the organics monitoring device at the outlet of the absorber, condenser or carbon adsorber, measured at least every 15 minutes and averaged over the same time period of the performance testing while the vent stream is normally routed and constituted, or
NR 440.686(6)(b)4.e.
e. All measurements and calculations performed to determine the TRE index value of the vent stream.
NR 440.686(6)(c)
(c) Each owner or operator subject to the provisions of this section shall keep up-to-date, readily accessible continuous records of the equipment operating parameters specified to be monitored under
sub. (4) (a) and
(c) as well as up-to-date, readily accessible records of periods of operation during which the parameter boundaries established during the most recent performance test are exceeded. The department may at any time require a report of these data. Where a combustion device is used to comply with
sub. (3) (a), periods of operation during which the parameter boundaries established during the most recent performance tests are exceeded are defined as follows:
NR 440.686(6)(c)1.
1. For thermal incinerators, all 3-hour periods of operation during which the average combustion temperature was more than 28
°C (50
°F) below the average combustion temperature during the most recent performance test at which compliance with
sub. (3) (a) was determined.
NR 440.686(6)(c)2.
2. For catalytic incinerators, all 3-hour periods of operation during which the average temperature of the vent stream immediately before the catalyst bed is more than 28
°C (50
°F) below the average combustion temperature during the most recent performance test at which compliance with
sub. (3) (a) was determined. The owner or operator also shall record all 3-hour periods of operation during which the average temperature difference across the catalyst bed is less than 80% of the average temperature difference of the device during the most recent performance test at which compliance with
sub. (3) (a) was determined.
NR 440.686(6)(c)3.
3. All 3-hour periods of operation during which the average combustion temperature was more than 28
°C (50
°F) below the average combustion temperature during the most recent performance test at which compliance with
sub. (3) (a) was determined for boilers or process heaters with a design heat input capacity of less than 44 MW (150 million Btu/hr).
NR 440.686(6)(c)4.
4. For boilers or process heaters, whenever there is a change in the location at which the vent stream is introduced into the flame zone as required under
sub. (3) (a).
NR 440.686(6)(d)
(d) Each owner or operator subject to the provisions of this section shall keep up to date, readily accessible continuous records of the flow indication specified under
sub. (4) (a) 2.,
(b) 2. and
(c) 1., as well as up-to- date, readily accessible records of all periods when the vent stream is diverted from the control device or has no flow rate.
