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)1.1. The equation for calculating the TRE index value of a vent stream controlled by an incinerator is as follows: 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.
NR 440.705(5)(e)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 emission rate of TOC reported in kg/hr
