- See PDF for table PDF
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 = 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 440.686(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 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.
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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)(6)Reporting and recordkeeping requirements.
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.