NR 440.26(6)(a)8.
8. An instrument for continuously monitoring and recording concentrations of sulfur dioxide in the gases at both the inlet and outlet of the sulfur dioxide control device from any fluid catalytic cracking unit catalyst regenerator for which the owner or operator seeks to comply with
sub. (5) (b) 1.
NR 440.26(6)(a)8.a.
a. The span value of the inlet monitor shall be set at 125% of the maximum estimated hourly potential sulfur dioxide emission concentration entering the control device, and the span value of the outlet monitor shall be set at 50% of the maximum estimated hourly potential sulfur dioxide emission concentration entering the control device.
NR 440.26(6)(a)9.
9. An instrument for continuously monitoring and recording concentrations of sulfur dioxide in the gases discharged into the atmosphere from any fluid catalytic cracking unit catalyst regenerator for which the owner or operator seeks to comply specifically with the 50 ppmv emission limit under
sub. (5) (b) 1.
NR 440.26(6)(a)9.a.
a. The span value of the monitor shall be set at 50% of the maximum hourly potential sulfur dioxide emission concentration of the control device.
NR 440.26(6)(a)10.
10. An instrument for continuously monitoring and recording concentrations of oxygen (O
2) in the gases at both the inlet and outlet of the sulfur dioxide control device (or the outlet only if specifically complying with the 50 ppmv standard) from any fluid catalytic cracking unit catalyst regenerator for which the owner or operator has elected to comply with
sub. (5) (b) 1. The span of the continuous monitoring system shall be set at 10%.
NR 440.26(6)(a)11.
11. The continuous monitoring systems under
par. (a) 8.,
9. and
10. are operated and data recorded during all periods of operation of the affected facility including periods of startup, shutdown or malfunction, except for continuous monitoring system breakdowns, repairs, calibration checks, and zero and span adjustments.
NR 440.26(6)(a)12.
12. The owner or operator shall use the following procedures to evaluate the continuous monitoring systems under
subds. 8.,
9. and
10.:
NR 440.26(6)(a)13.
13. When seeking to comply with
sub. (5) (b) 1., when emission data are not obtained because of continuous monitoring system breakdowns, repairs, calibration checks and zero and span adjustments, emission data will be obtained by using one of the following methods to provide emission data for a minimum of 18 hours per day in at least 22 out of 30 following successive calendar days:
NR 440.26(6)(c)
(c) The average coke burn-off rate (Mg (tons) per hour) and hours of operation shall be recorded daily for any fluid catalytic cracking unit catalyst regenerator subject to
sub. (3),
(4) or
(5) (b) 2.
NR 440.26(6)(d)
(d) For any fluid catalytic cracking unit catalyst regenerator under
sub. (3) that uses an incinerator-waste heat boiler to combust the exhaust gases from the catalyst regenerator, the owner or operator shall record daily the rate of combustion of liquid or solid fossil-fuels and the hours of operation during which liquid or solid fossil-fuels are combusted in the incinerator-waste heater boiler.
NR 440.26(6)(e)
(e) For the purpose of reports under
s. NR 440.07 (3), periods of excess emissions that shall be determined and reported are defined as follows:
NR 440.26 Note
Note:
All averages, except for opacity, shall be determined as the arithmetic average of the applicable 1-hour averages, e.g., the rolling 3-hour average shall be determined as the arithmetic average of 3 contiguous 1-hour averages.
NR 440.26(6)(e)1.
1. Opacity. All 1-hour periods that contain 2 or more 6-minute periods during which the average opacity as measured by the continuous monitoring system under
par. (a) 1. exceeds 30%.
NR 440.26(6)(e)2.
2. Carbon monoxide. All 1-hour periods during which the average CO concentration as measured by the CO continuous monitoring system under
par. (a) 2. exceeds 500 ppm.
NR 440.26(6)(e)3.a.a. All rolling 3-hour periods during which the average concentration of SO
2 as measured by the SO
2 continuous monitoring system under
par. (a) 3. exceeds 20 ppm (dry basis, zero percent excess air); or
NR 440.26(6)(e)3.b.
b. All rolling 3-hour periods during which the average concentration of H
2S as measured by the H
2S continuous monitoring system under
par. (a) 4. exceeds 230 mg/dscm (0.10 gr/dscf).
NR 440.26(6)(e)4.a.
a. All 12-hour periods during which the average concentration of SO
2 as measured by the SO
2 continuous monitoring system under
par. (a) 5. exceeds 250 ppm (dry basis, zero percent excess air); or
NR 440.26(6)(e)4.b.
b. All 12-hour periods during which the average concentration of reduced sulfur (as SO
2) as measured by the reduced sulfur continuous monitoring system under
par. (a) 6. exceeds 300 ppm; or
NR 440.26(6)(e)4.c.
c. All 12-hour periods during which the average concentration of SO
2 as measured by the SO
2 continuous monitoring system under
par. (a) 7. exceeds 250 ppm (dry basis, zero percent excess air).
NR 440.26(7)(a)(a) In conducting the performance tests required in
s. NR 440.08, the owner or operator shall use as reference methods and procedures the test methods in Appendix A of
40 CFR part 60, incorporated by reference in
s. NR 440.17, or other methods and procedures as specified in this subsection, except as provided in
s. NR 440.08 (2).
NR 440.26(7)(b)1.1. The emission rate (E) of PM shall be computed for each run using the following equation:
where:
E is the emission rate of PM, kg/Mg (lb/ton) of coke burn-off
cs is the concentration of PM, g/dscm (gr/dscf)
Qsd is the volumetric flow rate of exhaust gas, dscm/hr (dscf/hr)
Rc is the coke burn-off rate, Mg/hr (ton/hr) coke
K is a conversion factor, 1,000 g/kg (7000 gr/lb)
NR 440.26(7)(b)2.
2. Method 5B or 5F shall be used to determine particulate matter emissions and associated moisture content from affected facilities without wet FGD systems; only Method 5B shall be used after wet FGD systems. The sampling time for each run shall be at least 60 minutes and the sampling time for each run shall be at least 0.015 dscm/min (0.53 dscf/min) except that shorter sampling times may be approved by the department when process variables or other factors preclude sampling for at least 60 minutes.
NR 440.26(7)(b)3.
3. The coke burn-off rate (Rc) shall be computed for each run using the following equation:
where:
Rc is the coke burn-off rate, Mg/hr (ton/hr)
Qr is the volumetric flow rate of exhaust gas from catalyst regenerator before entering the emission control system, dscm/min (dscf/min)
Qa is the volumetric flow rate of air to FCCU regenerator, as determined from the fluid catalytic cracking unit control room instrumentation, dscm/min (dscf/min)
%CO2 is the carbon dioxide concentration, percent by volume (dry basis)
%CO is the carbon monoxide concentration, percent by volume (dry basis)
%O2 is the oxygen concentration, percent by volume (dry basis)
K1 is the material balance and conversion factor, 2.982 x 10-4 (Mg-min)/hr-dscm-%) [9.31 x 10
-6 (ton-min)/(hr-dscf-%)]
K2 is the material balance and conversion factor, 2.088 x 10-3 (Mg-min)/(hr-dscm-%) [6.52 x 10
-5 (ton-min)/(hr-dscf-%)]
K3 is the material balance and conversion factor, 9.94 x 10-5 (Mg-min)/(hr-dscm-%) [3.1 x 10-6 (ton-min)/(hr-dscf-%)]
NR 440.26(7)(b)3.b.
b. The emission correction factor, integrated sampling and analysis procedure of Method 3B of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1), shall be used to determine CO
2, CO and O
2 concentrations.
NR 440.26(7)(c)
(c) If auxiliary liquid or solid fossil fuels are burned in an incinerator-waste heat boiler, the owner or operator shall determine the emission rate of PM permitted in
sub. (3) (b) as follows:
NR 440.26(7)(c)1.
1. The allowable emission rate (E
s) of PM shall be computed for each run using the following equation:
where:
Es is the emission rate of PM allowed, kg/Mg (lb/ton) of coke burn-off in catalyst regenerator
F is the emission standard, 1.0 kg/Mg (2.0 lb/ton) of coke burn-off in catalyst regenerator
A is the allowable incremental rate of PM emission, 7.5 x 10-4 kg/million J (0.10 lb/million Btu)
H is the heat input rate from solid or liquid fossil fuel, million J/hr (million Btu/hr)
Rc is the coke burn-off rate, Mg coke/hr (ton coke/hr)
NR 440.26(7)(c)2.
2. Procedures subject to the approval of the department shall be used to determine the heat input rate.
NR 440.26(7)(d)
(d) The owner or operator shall determine compliance with the CO standard in
sub. (4) (a) by using the integrated sampling technique of Method 10 to determine the CO concentration (dry basis). The sampling time for each run shall be 60 minutes.
NR 440.26(7)(e)1.1. The owner or operator shall determine compliance with the H2S standard in
sub. (5) (a) 1. as follows: Method 11, 15, 15A or 16 of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1), shall be used to determine the H2S concentration. The gases entering the sampling train should be at about atmospheric pressure. If the pressure in the refinery fuel gas lines is relatively high, a flow control valve may be used to reduce the pressure. If the line pressure is high enough to operate the sampling train without a vacuum pump, the pump may be eliminated from the sampling train. The sample shall be drawn from a point near the centroid of the fuel gas line.
NR 440.26(7)(e)1.a.
a. For Method 11, the sampling time and sample volume shall be at least 10 minutes and 0.010 dscm (0.35 dscf). Two samples of equal sampling time shall be taken at about 1-hour intervals. The arithmetic average of these 2 samples shall constitute a run.
NR 440.26 Note
Note:
For most fuel gas, sampling time exceeding 20 minutes may result in depletion of the collection solution, although fuel gases containing low concentrations of H2S may necessitate sampling for longer periods of time.
NR 440.26(7)(e)1.b.
b. For Method 15 or 16, at least 3 injects over a 1-hour period shall constitute a run.
NR 440.26(7)(e)2.
2. Where emissions are monitored by
sub. (6) (a) 3., compliance with
sub. (6) (a) 1. shall be determined using Method 6 or 6C and Method 3 or 3A of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1). A 1-hour sample shall constitute a run. Method 6 samples shall be taken at a rate of approximately 2 liters/min. The ppm correction factor (Method 6) and the sampling location in
par. (f) 1. apply. Method 4 of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1), shall be used to determine the moisture content of the gases. The sampling point for Method 4 shall be adjacent to the sampling point for Method 6 or 6C.
NR 440.26(7)(f)
(f) The owner or operator shall determine compliance with the SO
2 and the H
2S and reduced sulfur standards in
sub. (5) (a) 2. as follows:
NR 440.26(7)(f)1.
1. Method 6 of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1), shall be used to determine the SO2 concentration. The concentration in mg/dscm obtained by Method 6 or 6C is multiplied by 0.3754 to obtain the concentration in ppm. The sampling point in the duct shall be the centroid of the cross section if the cross-sectional area is less than 5.00 m
2 (53.8 ft
2) or at a point no closer to the walls than 1.00 m (39.4 in.) if the cross-sectional area is 5.00 m
2 or more and the centroid is more than 1 m from the wall. The sampling time and sample volume shall be at least 10 minutes and 0.010 dscm (0.35 dscf) for each sample. Eight samples of equal sampling times shall be taken at about 30-minute intervals. The arithmetic average of these 8 samples shall constitute a run. For Method 6C, a run shall consist of the arithmetic average of 4 1-hour samples. Method 4 of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1), shall be used to determine the moisture content of the gases. The sampling point for Method 4 shall be adjacent to the sampling point for Method 6 or 6C. The sampling time for each sample shall be equal to the time it takes for 2 Method 6 samples. The moisture content from this sample shall be used to correct the corresponding Method 6 samples for moisture. For documenting the oxidation efficiency of the control device for reduced sulfur compounds, Method 15 of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1), shall be used following the procedures of
subd. 2.
NR 440.26(7)(f)2.
2. Method 15 shall be used to determine the reduced sulfur and H
2S concentrations. Each run shall consist of 16 samples taken over a minimum of 3 hours. The sampling point shall be the same as the described for Method 6 in
subd. 1. To ensure minimum residence time for the sample inside the sample lines, the sampling rate shall be at least 3.0 lpm (0.10 cfm). The SO
2 equivalent for each run shall be calculated after being corrected for moisture and oxygen as the arithmetic average of the SO
2 equivalent for each sample during the run. Method 4 shall be used to determine the moisture content of the gases as in
subd. 1. The sampling time for each sample shall be equal to the time it takes for 4 Method 15 samples.
NR 440.26(7)(f)3.
3. The oxygen concentration used to correct the emission rate for excess air shall be obtained by the integrated sampling and analysis procedure of Method 3 or 3A of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1). The samples shall be taken simultaneously with the SO
2 reduced sulfur and H
2S, or moisture samples. The SO
2, reduced sulfur and H
2S samples shall be corrected to zero percent excess air using the equation in
par. (h) 6.
NR 440.26(7)(g)
(g) Each performance test conducted for the purpose of determining compliance under
sub. (5) (b) shall consist of all testing performed over a 7-day period using Method 6 or 6C and Method 3 or 3A of
40 CFR part 60, Appendix A, incorporated by reference in
s. NR 440.17 (1). To determine compliance, the arithmetic mean of the results of all the tests shall be compared with the applicable standard.
NR 440.26(7)(h)
(h) For the purpose of determining compliance with
sub. (5) (b) 1., the following calculation procedures shall be used:
NR 440.26(7)(h)1.
1. Calculate each 1-hour average concentration (dry, zero percent oxygen, ppmv) of sulfur dioxide at both the inlet and the outlet to the add-on control device as specified in
s. NR 440.13 (8). These calculations are made using the emission data collected under
sub. (6) (a).
NR 440.26(7)(h)2.
2. Calculate a 7-day average (arithmetic mean) concentration of sulfur dioxide for the inlet and for the outlet to the add-on control device using all of the 1-hour average concentration values obtained during 7 successive 24-hour periods.
where:
-
See PDF for diagram 
is the sulfur dioxide emission concentration determined in
subd. 2. at the inlet to the add-on control device, ppmv
-
See PDF for diagram is the sulfur dioxide emission concentration determined in
subd. 2. at the outlet to the add-on control device, ppmv
100 is the conversion factor, decimal to percent
NR 440.26(7)(h)4.
4. Outlet concentrations of sulfur dioxide from the add-on control device for compliance with the 50 ppmv standard, reported on a dry, O
2-free basis, shall be calculated using the procedures outlined in
subds. 1. and
2., but for the outlet monitor only.
