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.