Bws is the water vapor content of the vent stream, proportion by volume
where:
ETOC is the emission rate of TOC in the sample, kg/hr
K2 is a constant, 2.494 10-6 (l/ppm) (g-mole/scm) (kg/g) (min/hr), where standard temperature for (g-mole/scm) is 20°C
Cj is the concentration on a dry 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
Qs is the vent stream flow rate (dscm/min) at a temperature of 20°C
NR 440.705(5)(d)6.
6. The total 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 440.705(5)(e)
(e) For purposes of complying with
subs. (1) (c) 2. and
(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 440.705(5)(e)1.a.
a. Where for a vent stream flow rate (scm/min) at a standard temperature of 20
°C that is greater than or equal to 14.2 scm/min:
TRE is the TRE index value
Qs is the vent stream flow rate (scm/min) at a standard temperature of 20°C
HT is the vent stream net heating value (MJ/scm), where the net enthalpy per mole of vent stream is based on combustion at 25°C and 760 mm Hg but the standard temperature for determining the volume corresponding to one mole is 20°C as in the definition of Qs
Ys is Qs for all vent stream categories listed in Table 1 except for Category E vent streams where Ys = (Qs ) (HT)/3.6
ETOC is the hourly emissions of TOC reported in kg/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.
NR 440.705(5)(e)1.b.
b. For a vent stream flow rate (scm/min) at a standard temperature of 20
°C that is less than 14.2 scm/min:
TRE is the TRE index value
Qs is 14.2 scm/min
HT = (FLOW) (HVAL)/14.2
where the following inputs are used:
FLOW is the vent stream flow rate (scm/min) at a standard temperature of 20°C
HVAL is the vent stream net heating value (MJ/scm) where the net enthalpy per mole of vent stream is based on combustion at 25°C and 760 mm Hg but the standard temperature for determining the volume corresponding to one mole is 20°C as in the definition of Qs
Ys is 14.2 scm/min for all vent streams except for Category E vent streams where Ys = (14.2) (HT)/3.6
ETOC is the hourly emissions of TOC reported in kg/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 is the TRE index value
ETOC is the hourly emission rate of TOC reported in kg/hr
Qs is the vent stream flow rate (scm/min) at a standard temperature of 20°C
HT is the vent stream net heating value (MJ/scm) where the net enthalpy per mole of offgas is based on combustion at 25°C and 760 mm Hg but the standard temperature for determining the volume corresponding to one mole is 20°C as in the definition of Qs
a, b, c, d and e are coefficients. The set of coefficients that apply to a vent stream can be obtained from Table 2.
-
See PDF for table 
NR 440.705(5)(f)
(f) Each owner or operator of an affected facility seeking to comply with
sub. (1) (c) 2. 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 on the recovery system.
NR 440.705(5)(f)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) or
(b). 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 440.705(5)(f)2.
2. Where 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 440.705(5)(g)
(g) Any owner or operator subject to the provisions of this section seeking to demonstrate compliance with
sub. (1) (c) 4. shall use Method 2, 2A, 2C or 2D of Appendix A to
40 CFR part 60, incorporated by reference in
s. NR 440.17, for determination of volumetric flow rate.
NR 440.705(5)(h)
(h) Each owner or operator seeking to demonstrate that a reactor process vent stream has a TOC concentration for compliance with the low concentration exemption in
sub. (1) (c) 8. shall conduct an initial test to measure TOC concentration.
NR 440.705(5)(h)3.
3. Where Method 18 is used to qualify for the low concentration exclusion in
sub. (1) (c) 8., the procedures in
par. (b) 4. a. and
d. shall be used to measure TOC concentration and the procedures of
par. (b) 3. shall be used to correct the TOC concentration to 3% oxygen. To qualify for the exclusion, the results shall demonstrate that the concentration of TOC corrected to 3% oxygen is below 300 ppm by volume.
NR 440.705(5)(h)4.
4. Where Method 25A is used, the following procedures shall be used to calculate ppm by volume TOC concentration corrected to 3% oxygen:
NR 440.705(5)(h)4.a.
a. Method 25A shall be used only if a single organic compound is greater than 50% of total TOC, by volume, in the reactor process vent stream. This compound shall be the principal organic compound.
NR 440.705(5)(h)4.b.
b. The principal organic compound may be determined by either process knowledge or test data collected using an appropriate reference method. Examples of information that could constitute process knowledge include calculations based on material balances, process stoichiometry or previous test results provided the results are still relevant to the current reactor process vent stream conditions.
NR 440.705(5)(h)4.c.
c. The principal organic compound shall be used as the calibration gas for Method 25A.
NR 440.705(5)(h)4.e.
e. Use of Method 25A is acceptable if the response from the high level calibration gas is at least 20 times the standard deviation of the response from the zero calibration gas when the instrument is zeroed on the most sensitive scale.
NR 440.705(5)(h)4.f.
f. The owner or operator shall demonstrate that the concentration of TOC, including methane and ethane, measured by Method 25A, corrected to 3% oxygen, is below 150 ppm by volume to qualify for the low concentration exclusion in
sub. (1) (c) 8.
NR 440.705(6)(a)(a) Each owner or operator subject to
sub. (3) shall notify the department of the specific provisions of
sub. (3) (a),
(b) or
(c) 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) no later than 180 days from initial startup.
NR 440.705(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 or where the reactor process vent stream is introduced as the primary fuel to any size boiler or process heater to comply with
sub. (3) (a), a report containing performance test data need not be submitted, but a report containing the information in
par. (b) 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 combustion device, outlet concentration of TOC or the TRE index value of a vent stream from a recovery system is determined.
NR 440.705(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 440.705(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 440.705(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 440.705(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 440.705(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 440.705(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 440.705(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, for example, 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 440.705(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 440.705(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 absorbing liquid measured at least every 15 minutes and averaged over the same time period of the performance testing, with both measured while the vent stream is normally routed and constituted; or
NR 440.705(6)(b)4.b.
b. Where a condenser is the final recovery device in the recovery system, the average product side exit 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 440.705(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 or 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 with all measured while the vent stream is routed and constituted normally; or
NR 440.705(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.
NR 440.705(6)(b)4.e.
e. All measurements and calculations performed to determine the TRE index value of the vent stream.
NR 440.705(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 440.705(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 440.705(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 temperature of the vent stream 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 bed during the most recent performance test at which compliance with
sub. (3) (a) was determined.
NR 440.705(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) where the vent stream is introduced with the combustion air or as a secondary fuel.
NR 440.705(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 440.705(6)(d)
(d) Each owner or operator subject to the provisions of this section shall keep records of the following:
NR 440.705(6)(d)1.
1. Up to date, readily accessible continuous records of the flow indication specified under
sub. (4) (a) 2. a.,
(b) 2. a. and
(c) 1. a. as well as up to date, readily accessible records of all periods and the duration when the vent stream is diverted from the control device.
NR 440.705(6)(d)2.
2. Where a seal mechanism is used to comply with
sub. (4) (a) 2. b.,
(b) 2. b., and
(c) 1. b., a record of continuous flow is not required. In such cases the owner or operator shall keep up to date, readily accessible records of all monthly visual inspections of the seals as well as readily accessible records of all periods and the duration when the seal mechanism is broken, the bypass line valve position has changed, the serial number of the broken car-seal has changed or when the key for a lock-and-key type configuration has been checked out.
NR 440.705(6)(e)
(e) Each owner or operator subject to the provisions of this section shall keep up to date, readily accessible continuous records of the flare pilot flame monitoring specified under
sub. (4) (b) as well as up to date, readily accessible records of all periods of operations in which the pilot flame is absent.
NR 440.705(6)(f)
(f) 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) (d) 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 an owner or operator seeks to comply with
sub. (3) (c), periods of operation during which the parameter boundaries established during the most recent performance tests are exceeded are defined as follows:
NR 440.705(6)(f)1.
1. Where an absorber is the final recovery device in a recovery system, and where an organic compound monitoring device is not used:
NR 440.705(6)(f)1.a.
a. All 3-hour periods of operation during which the average absorbing liquid temperature was more than 11
°C (20
°F) above the average absorbing liquid temperature during the most recent performance test; or
NR 440.705(6)(f)1.b.
b. All 3-hour periods of operation during which the average absorbing liquid specific gravity was more than 0.1 unit above or more than 0.1 unit below the average absorbing liquid specific gravity during the most recent performance test unless monitoring of an alternative parameter, which is a measure of the degree of absorbing liquid saturation, is approved by the department in which case the department will define appropriate parameter boundaries and periods of operation during which they are exceeded.
NR 440.705(6)(f)2.
2. Where a condenser is the final recovery device in a system and where an organic compound monitoring device is not used, all 3-hour periods of operation during which the average product side exit condenser operating temperature was more than 6
°C (11
°F) above the average product side exit operating temperature during the most recent performance test.
NR 440.705(6)(f)3.
3. Where a carbon adsorber is the final recovery device in a system and where an organic compound monitoring device is not used:
NR 440.705(6)(f)3.a.
a. All carbon bed regeneration cycles during which the total mass steam flow was more than 10% below the total mass steam flow during the most recent performance test; or
NR 440.705(6)(f)3.b.
b. All carbon bed regeneration cycles during which the temperature of the carbon bed after regeneration and after completion of any cooling cycle was more than 10% or 5
°C greater, whichever is less stringent, than the carbon bed temperature in degrees Celsius during the most recent performance test.
NR 440.705(6)(f)4.
4. Where an absorber, condenser or carbon adsorber is the final recovery device in the recovery system and where an organic compound monitoring device is used, all 3-hour periods of operation during which the average organic compound concentration level or reading of organic compounds in the exhaust gases is more than 20% greater than the exhaust gas organic compound concentration level or reading measured by the monitoring device during the most recent performance test.
NR 440.705(6)(g)
(g) Each owner or operator of an affected facility subject to the provisions of this section and seeking to demonstrate compliance with
sub. (3) (c) shall keep up to date, readily accessible records of:
NR 440.705(6)(g)1.
1. Any changes in production capacity, feedstock type or catalyst type or of any replacement, removal or addition of recovery equipment or reactors;
