where:
Eunc is the uncontrolled annual emissions, Mg/yr (ton/yr)
Cj is the concentration of sample component j of the gas stream, dry basis, ppmv
Mj is the molecular weight of sample component j of the gas stream, g/g-mole (lb/lb-mole)
Q is the flow rate of the gas stream, dscm/hr (dscf/hr)
K2 is 4.157 x 10-11 [(Mg) (g-mole)]/[(g) (ppm) (dscm)] for metric units and 1.298 x 10-12 [(ton) (lb-mole)]/[(lb) (ppm) (dscf)] for English units
8,600 is the operating hours per year
NR 440.647(6)(d)1.a.a. Method 18 shall be used to determine the concentration of each individual organic component (Cj) in the gas stream. Method 1 or 1A, as appropriate, shall be used to determine the sampling site. If the gas stream is controlled in an existing control device, the sampling site shall be before the inlet of the control device and after all product recovery units. NR 440.647(6)(d)1.b.b. Method 2, 2A, 2C or 2D, as appropriate, shall be used to determine the volumetric flow rate (Q). If necessary, Method 4 shall be used to determine the moisture content. Both determinations shall be compatible with the Method 18 determinations. NR 440.647(6)(d)1.c.c. 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 440.647(6)(d)2.2. The weight percent VOC of the uncontrolled individual vent stream shall be determined using the following equation: where:
Cj is the concentration of sample TOC component “j” of the gas stream, dry basis, ppmv
Mj is the molecular weight of sample TOC component “j” of the gas stream, g/g-mole (lb/lb-mole)
MWgas is the average molecular weight of the entire gas stream, g/g-mole (lb/lb-mole)
NR 440.647(6)(d)2.a.a. Method 18 shall be used to determine the concentration of each individual organic component (Cj) in the gas stream. Method 1 or 1A, as appropriate, shall be used to determine the sampling site. If the gas stream is controlled in an existing control device, the sampling site shall be before the inlet of the control device and after all product recovery units. If necessary, Method 4 shall be used to determine the moisture content. This determination shall be compatible with the Method 18 determinations. NR 440.647(6)(d)2.b.b. The average molecular weight of the gas stream shall be determined using methods approved by the department. If the carrier component of the gas stream is nitrogen, then an average molecular weight of 28 g/g-mole (lb/lb- mole) may be used in lieu of testing. If the carrier component of the gas stream is air, then an average molecular weight of 29 g/g-mole (lb/lb-mole) may be used in lieu of testing. NR 440.647(6)(d)2.c.c. 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 440.647(6)(e)(e) The owner or operator shall determine compliance of flares with the visible emission and flare provisions in sub. (3) as follows: NR 440.647(6)(f)(f) The owner or operator shall determine compliance with the net heating value provisions in s. NR 440.18 as referenced by sub. (3) (a) 1. a. 3). The net heating value of the process vent stream being combusted in a flare shall be computed as follows: where:
HT is the vent stream net heating value, MJ/scm (Btu/scf), where the net enthalpy per mole of offgas 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)
K3 is 1.74 x 10-7 (l/ppm)(g-mole/scm)(MJ/kcal) for metric units where standard temperature for (g-mole/scm) is 20°C and 4.67 x 10-6 (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
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)
NR 440.647(6)(f)1.1. Method 18 shall be used to determine the concentration of each individual organic component (Cj) in the gas stream. Method 1 or 1A, as appropriate, shall be used to determine the sampling site to the inlet of the flare. Using this same sample, ASTM D1946-90 (reapproved 1994), incorporated by reference in s. NR 440.17 (2) (a) 24., shall be used to determine the hydrogen and carbon monoxide content. NR 440.647(6)(f)2.2. 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 440.647(6)(f)3.3. Published or calculated values shall be used for the net heats of combustion of the sample components. If values are not published or cannot be calculated, ASTM D2382-88 or D4809-95, incorporated by reference in s. NR 440.17 (2) (a) 30. and 61., may be used to determine the net heat of combustion of component “j”. NR 440.647(6)(g)1.1. If applicable, the net heating value (HT) of the process vent shall be determined according to the procedures in par. (f) to determine the applicable velocity requirements. NR 440.647(6)(g)2.2. If applicable, the maximum permitted velocity (Vmax) for steam-assisted and nonassisted flares shall be computed using the following equation: where:
Vmax is the maximum permitted velocity, m/sec (ft/sec)
K4 is 28.8 for metric units and 1212 for English units
K5 is 31.7 for metric units and 850.8 for English units
HT is the net heating value as determined in par. (f), MJ/scm (Btu/scf)
NR 440.647(6)(g)3.3. The maximum permitted velocity, Vmax, for air-assisted flares shall be determined by the following equation: where:
Vmax is the maximum permitted velocity, m/sec (ft/sec)
K6 is 8.706 m/sec for metric units and 28.56 ft/sec for English units
K7 is 0.7084 [(m/sec)/(MJ/scm)] for metric units and 0.00245 [(ft/sec)/(Btu/scf)] for English units
HT is the net heating value as determined in par. (f), MJ/scm (Btu/scf)
NR 440.647(6)(g)4.4. The actual exit velocity of a flare shall be determined by dividing the volumetric flow rate (in units of standard temperature and pressure), as determined by Method 2, 2A, 2C or 2D as appropriate, by the unobstructed (free) cross sectional area of the flare tip. NR 440.647(6)(h)1.1. The emission rate of TOC shall be computed using the following equation: where:
ERTOC is the emission rate of total organic compounds, minus methane and ethane, kg TOC/Mg product (lb TOC/ton)
ETOC is the emission rate of total organic compounds, minus methane and ethane, in the sample, kg/hr (lb/hr)
Pp is the rate of polymer production, kg/hr (lb/hr)
K5 is 1,000 kg/Mg for metric units and 2,000 lb/ton for English units
NR 440.647(6)(h)2.2. The mass rate of TOC, ETOC, shall be determined according to the procedures, as appropriate, in par. (c) 2. The sampling site for determining compliance with sub. (1) (d) and (e) shall be before any add-on control devices and after all product recovery devices. Otherwise, the sampling site shall be at the outlet of the control device. NR 440.647(6)(h)3.3. The rate of polymer production, Pp, shall be determined by dividing the weight of polymer pulled (in kg (lb)) from the process line during the performance test by the number of hours taken to perform the performance test. The weight of polymer pulled shall be determined by direct measurement or, subject to prior approval by the department, computed from materials balance by good engineering practice. NR 440.647(6)(i)(i) The owner or operator shall determine continuous compliance with the temperature requirements in sub. (3) (b) 1. b. and 1. a. 2) by using the temperature monitoring equipment described in sub. (5) (a) 1. An average temperature shall be determined from measurements taken at least every 15 minutes every 3 hours while the vent stream is normally routed and constituted. Each 3-hour period constitutes a performance test. NR 440.647(6)(j)(j) For purposes of determining compliance with sub. (3) (c) 1. b. 2), 3), 2. b. 2) or 3), the ethylene glycol concentration in either the cooling tower or the liquid effluent from steam-jet ejectors used to produce a vacuum in the polymerization reactors, whichever is applicable, shall be determined: NR 440.647(6)(j)1.1. Using procedures that conform to the methods described in ASTM D2908-91, Standard Practice for Measuring Volatile Organic Matter in Water by Aqueous-Injection Gas Chromatography, incorporated by reference in s. NR 440.17 (2) (a) 37., except as provided in subd. 2.: NR 440.647(6)(j)1.a.a. At least one sample per operating day shall be collected using the grab sampling procedures of ASTM D3370-95a, Standard Practices for Sampling Water, incorporated by reference in s. NR 440.17 (2) (a) 47. An average ethylene glycol concentration by weight shall be calculated on a daily basis over a rolling 14-day period of operating days, except as provided in subd. 1. b. and c. Each daily average ethylene glycol concentration so calculated constitutes a performance test. Exceedance of the standard during the reduced testing program specified in subd. 1. b. and c. is a violation of these standards. NR 440.647(6)(j)1.b.b. For those determining compliance with sub. (3) (c) 1. b. 2) or 2. b. 2), the owner or operator may elect to reduce the sampling program to any 14 consecutive day period once every 2 calendar months, if at least 17 consecutive 14-day rolling average concentrations immediately preceding the reduced sampling program are each less than 0.10 weight percent ethylene glycol. If the average concentration obtained over the 14 day sampling during the reduced testing period exceeds the upper 95% confidence interval calculated from the most recent test results in which no one 14-day average exceeded 0.10 weight percent ethylene glycol, then the owner or operator shall reinstitute a daily sampling program. A reduced sampling program can be reinstituted if the requirements specified in this paragraph are met. NR 440.647(6)(j)1.c.c. For those determining compliance with sub. (3) (c) 1. b. 3) or 2. b. 3) the owner or operator may elect to reduce the sampling program to any 14 consecutive day period once every 2 calendar months, if at least 17 consecutive 14-day rolling average concentrations immediately preceding the reduced sampling program are each less than 1.8 weight percent ethylene glycol. If the average concentration obtained over the 14 day sampling during the reduced test period exceeds the upper 95% confidence interval calculated from the most recent test results in which no one 14-day average exceeded 1.8 weight percent ethylene glycol, then the owner or operator shall reinstitute a daily sampling program. A reduced program can be reinstituted if the requirements specified in this paragraph are met. NR 440.647(6)(j)1.d.d. The upper 95% confidence interval shall be calculated using the following equation: where:
Xi is the daily ethylene glycol concentration for each day used to calculate the 14-day rolling average used in test results to justify implementing the reduced testing program
n is the number of ethylene glycol concentrations
NR 440.647(6)(j)2.2. Measuring an alternative parameter, such as carbon oxygen demand or biological oxygen demand, that is demonstrated to be directly proportional to the ethylene glycol concentration. The parameter shall be measured during the initial 14-day performance test during which the facility is shown to be in compliance with the ethylene glycol concentration standard whereby the ethylene glycol concentration is determined using the procedures described in subd. 1. The alternative parameter shall be measured on a daily basis and the average value of the alternative parameter shall be calculated on a daily basis over a rolling 14-day period of operating days. Each daily average value of the alternative parameter constitutes a performance test. NR 440.647(7)(a)(a) Each owner or operator subject to the provisions of this section shall keep an up-to-date, readily-accessible record of the following information measured during each performance test and shall include the following information in the report of the initial performance test in addition to the written results of such performance tests as required under s. NR 440.08. Where a control device is used to comply with sub. (3) (a) 1. a. 4) only, a report containing performance test data need not be submitted, but a report containing the information in subd. 11. is required. Where a boiler or process heater with a design heat input capacity of 150 million Btu/hr 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 information 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 or the outlet concentration of TOC, minus methane and ethane, is determined. NR 440.647(7)(a)1.a.a. The average firebox temperature of the incinerator (or the average temperature upstream and downstream of the catalyst bed), measured at least every 15 minutes and averaged over the performance test period, and NR 440.647(7)(a)1.b.b. The percent reduction of TOC (minus methane and ethane) achieved by the incinerator, the concentration of TOC (minus methane and ethane) (ppmv, by compound) at the outlet of the control device on a dry basis or the emission rate in terms of kg TOC (minus methane and ethane) per Mg of product (lb TOC/ton) at the outlet of the control device, whichever is appropriate. If supplemental combustion air is used, the TOC concentration corrected to 3% oxygen shall be recorded and reported. NR 440.647(7)(a)2.a.a. A description of the location at which the vent stream is introduced into the boiler or process heater, and NR 440.647(7)(a)2.b.b. For boilers or process heaters with a design heat input capacity of less than 150 million Btu/hr, 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 was determined. NR 440.647(7)(a)3.a.a. All visible emission readings, heat content determinations, flow rate measurements and exit velocity determinations made during the performance test, NR 440.647(7)(a)4.4. When an incinerator, boiler or process heater is used to demonstrate compliance with sub. (3) (a) 2., a description of the location at which the vent stream is introduced into the incinerator, boiler or process heater. NR 440.647(7)(a)6.6. When an absorber is the final unit in a system to demonstrate compliance with sub. (3) except sub. (3) (a) 2., the specific gravity, or alternative parameter that is a measure of the degree of absorbing liquid saturation, if approved by the department, and average temperature, measured at least every 15 minutes and averaged over the performance test period, of the absorbing liquid, both measured while the vent stream is normally routed and constituted. NR 440.647(7)(a)7.7. When a condenser is the final unit in a system to demonstrate compliance with sub. (3) except sub. (3) (a) 2. the average exit (product side) temperature, measured at least every 15 minutes and averaged over the performance test period while the vent stream is normally routed and constituted.
