NR 440.26(3)(a)2.2. Gases exhibiting greater than 30% opacity, except for one 6-minute average opacity reading in any one hour period. NR 440.26(3)(b)(b) Where the gases discharged by the fluid catalytic cracking unit catalyst regenerator pass through an incinerator or waste heat boiler in which auxiliary or supplemental liquid or solid fossil fuel is burned, particulate matter in excess of that permitted by par. (a) 1. may be emitted to the atmosphere, except that the incremental rate of particulate matter emissions may not exceed 43.0 g/MJ (0.10 lb/million Btu) of heat input attributable to such liquid or solid fossil fuel. NR 440.26(4)(4) Standard for carbon monoxide. Each owner or operator of any fluid catalytic cracking unit catalyst regenerator that is subject to the requirements of this section shall comply with the emission limitations set forth in this subsection on and after the date on which the initial performance test, required by s. NR 440.08, is completed, but not later than 60 days after achieving the maximum production rate at which the fluid catalytic cracking unit catalyst regenerator will be operated, or 180 days after initial startup, whichever comes first. NR 440.26(4)(a)(a) No owner or operator subject to the provisions of this section may discharge or cause the discharge into the atmosphere from any fluid catalytic cracking unit catalyst regenerator any gases that contain carbon monoxide (CO) in excess of 500 ppm by volume (dry basis). NR 440.26(5)(5) Standard for sulfur dioxide. Each owner or operator that is subject to the requirements of this section shall comply with the emission limitations set forth in this subsection on and after the date on which the initial performance test, required by s. NR 440.08, is completed, but not later than 60 days after achieving the maximum production rate at which the affected facility will be operated, or 180 days after initial startup, whichever comes first. NR 440.26(5)(a)(a) No owner or operator subject to the provisions of this section may: NR 440.26(5)(a)1.1. Burn in any fuel gas combustion device any fuel gas that contains hydrogen sulfide (H2S) in excess of 230 mg/dscm (0.10 gr/dscf). The combustion in a flare of process upset gases or fuel gas that is released to the flare as a result of relief valve leakage or other emergency malfunctions is exempt from this paragraph. NR 440.26(5)(a)2.2. Discharge or cause the discharge of any gases into the atmosphere from any Claus sulfur recovery plant containing in excess of: NR 440.26(5)(a)2.a.a. For an oxidation control system or a reduction control system followed by incineration, 250 ppm by volume (dry basis) of sulfur dioxide (SO2) at zero percent excess air. NR 440.26(5)(a)2.b.b. For a reduction control system not followed by incineration, 300 ppm by volume of reduced sulfur compounds and 10 ppm by volume of hydrogen sulfide (H2S), each calculated as ppm SO2 by volume (dry basis) at zero percent excess air. NR 440.26(5)(b)(b) Each owner or operator that is subject to the provisions of this section shall comply with one of the following conditions for each affected fluid catalytic cracking unit catalyst regenerator: NR 440.26(5)(b)1.1. With an add-on control device, reduce sulfur dioxide emissions to the atmosphere by 90% or maintain sulfur dioxide emissions to the atmosphere less than or equal to 50 ppm by volume (ppmv), whichever is less stringent. NR 440.26(5)(b)2.2. Without the use of an add-on control device, maintain sulfur oxides emissions calculated as sulfur dioxide to the atmosphere less than or equal to 9.8 kg/Mg (20 lb/ton) coke burn-off. NR 440.26(5)(b)3.3. Process in the fluid catalytic cracking unit fresh feed that has a total sulfur content no greater than 0.30% by weight. NR 440.26(5)(c)(c) Compliance with par. (b) 1., 2. or 3. is determined daily on a 7-day rolling average basis using the appropriate procedures outlined in sub. (7). NR 440.26(5)(d)(d) A minimum of 22 valid days of data shall be obtained every 30 rolling successive calendar days when complying with par. (b) 1. NR 440.26(6)(a)(a) Continuous monitoring systems shall be installed, calibrated, maintained and operated by the owner or operator subject to the provisions of this section as follows: NR 440.26(6)(a)1.1. For fluid catalytic cracking unit catalyst regenerators subject to sub. (3) (a) 2., an instrument for continuously monitoring and recording the opacity of emission into the atmosphere. The instrument shall be spanned at 60, 70 or 80% opacity. NR 440.26(6)(a)2.2. For fluid catalytic cracking unit catalyst regenerators subject to sub. (4) (a), an instrument for continuously monitoring and recording the concentration by volume (dry basis) of CO emission into the atmosphere, except as provided in subd. 2. b. NR 440.26(6)(a)2.b.b. A CO continuous monitoring system need not be installed if the owner or operator demonstrates that the average CO emission are less than 50 ppm on a dry basis and also files a written request for exemption to the department and receives an exemption. The demonstration shall consist of continuously monitoring CO emissions for 30 days using an instrument that shall meet the requirements of Performance Specification 4 of Appendix B of 40 CFR part 60, incorporated by reference in s. NR 440.17. The span value shall be 100 ppm CO instead of 1,000 ppm, and the relative accuracy limit shall be 10% of the average CO emission or 5 ppm CO, whichever is greater. For instruments that are identical to Method 10 of Appendix A of 40 CFR part 60, incorporated by reference in s. NR 440.17, and employ the sample conditioning system of Method 10A of Appendix A, the alternative relative accuracy test procedure in s. 10.1 of Performance Specification 2 of Appendix B may be used in place of the relative accuracy test. NR 440.26(6)(a)3.3. For fuel gas combustion devices subject to sub. (5) (a) 1., an instrument for continuously monitoring and recording the concentration by volume (dry basis, zero percent excess air) of SO2 emissions into the atmosphere, except where an H2S monitor is installed under par. (a) 4. The monitor shall include an oxygen monitor for correcting the data for excess air. NR 440.26(6)(a)3.b.b. The SO2 monitoring level equivalent to the H2S standard under sub. (5) (a) 1. shall be 20 ppm (dry basis, zero percent excess air). NR 440.26(6)(a)3.c.c. The performance evaluations for this SO2 monitor under s. NR 440.13 (3) shall use Performance Specification 2 of 40 CFR part 60, Appendix B, incorporated by reference in s. NR 440.17 (1). Methods 6 or 6C and 3 or 3A of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), shall be used for conducting the relative accuracy evaluations. Method 6 samples shall be taken at a flow rate of approximately 2 liters/min for at least 30 minutes. The relative accuracy limit shall be 20% or 4 ppm, whichever is greater, and the calibration drift limit shall be 5% of the established span value. NR 440.26(6)(a)3.d.d. Fuel gas combustion devices having a common source of fuel gas may be monitored at only one location, that is, after one of the combustion devices, if monitoring at this location accurately represents the SO2 emission into the atmosphere from each of the combustion devices. NR 440.26(6)(a)4.4. In place of the SO2 monitor in par. (a) 3., an instrument for continuously monitoring and recording the concentration (dry basis) of H2S in fuel gases before being burned in any fuel gas combustion device. NR 440.26(6)(a)4.b.b. Fuel gas combustion devices having a common source of fuel gas may be monitored at only one location, if monitoring at this location accurately represents the concentration of H2S in the fuel gas begin burned. NR 440.26(6)(a)5.5. For Claus sulfur recovery plants with oxidation control systems or reduction control systems followed by incineration subject to sub. (5) (a) 2. a., an instrument for continuously monitoring and recording the concentration (dry basis, zero percent excess air) of SO2 emissions into the atmosphere. The monitor shall include an oxygen monitor for correcting the data for excess air. NR 440.26(6)(a)6.6. For Claus sulfur recovery plants with reduction control systems not followed by incineration subject to sub. (5) (a) 2. b., an instrument for continuously monitoring and recording the concentration of reduced sulfur and O2 emissions into the atmosphere. The reduced sulfur emission shall be calculated as SO2 (dry basis, zero percent excess air). NR 440.26(6)(a)6.b.b. The performance evaluations for this reduced sulfur (and O2) monitor under s. NR 440.13 (3) shall use Performance Specification 5 (and Performance Specification 3 for the O2 analyzer) of 40 CFR part 60, Appendix B, incorporated by reference in s. NR 440.17 (1). Methods 15 or 15A and Method 3 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), shall be used for conducting the relative accuracy evaluations. If Method 3 yields O2 concentrations below 0.25% during the performance specification test, the O2 concentration may be assumed to be zero and the reduced sulfur CEMS need not include an O2 monitor. NR 440.26(6)(a)7.7. In place of the reduced sulfur monitor under subd. 6., an instrument using an air or O2 dilution and oxidation system to convert the reduced sulfur to SO2 for continuously monitoring and recording the concentration (dry basis, zero percent excess air) of the resultant SO2. The monitor shall include an oxygen monitor for correcting the data for excess oxygen. NR 440.26(6)(a)7.b.b. For reporting purposes, the SO2 exceedance level for this monitor is 250 ppm (dry basis, zero percent excess air). NR 440.26(6)(a)7.c.c. The performance evaluations for the SO2 (and O2) monitor under s. NR 440.13 (3) shall use Performance Specification 5. Methods 15 or 15A and Method 3 shall be used for conducting the relative accuracy evaluations. 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 (O2) 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 NoteNote: 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 SO2 as measured by the SO2 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 H2S as measured by the H2S 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 SO2 as measured by the SO2 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 SO2) 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 SO2 as measured by the SO2 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)
