NR 440.20(6)(d)1.1. Operating all operable flue gas desulfurization system modules, and bringing back into operation any malfunctioned module as soon as repairs are completed. NR 440.20(6)(d)2.2. Bypassing flue gases around only those flue gas desulfurization system modules that have been taken out of operation because they were incapable of any sulfur dioxide emission reduction or which would have suffered significant physical damage if they had remained in operation, and NR 440.20(6)(d)3.3. Designing, constructing and operating a spare flue gas desulfurization system module for an affected facility larger than 365 MW (1,250 million Btu/hr) heat input (approximately 125 MW electrical output capacity). The department may at its discretion require the owner or operator within 60 days of notification to demonstrate spare module capability. To demonstrate this capability, the owner or operator shall demonstrate compliance with the appropriate requirements under sub. (4) (a), (b), (d) and (h) for any period of operation lasting from 24 hours to 30 days when: NR 440.20(6)(d)3.c.c. The fuel fired during the 24-hour to 30-day period is representative of the type and average sulfur content of fuel used over a typical 30-day period, and NR 440.20(6)(d)3.d.d. The owner or operator has given the department at least 30 days notice of the date and period of time over which the demonstration will be performed. NR 440.20(6)(e)(e) Compliance after the initial performance test. After the initial performance test required under s. NR 440.08, compliance with the sulfur dioxide emission limitations and percentage reduction requirements under sub. (4) and the nitrogen oxides emission limitations under sub. (5) shall be based on the average emission rate for 30 successive boiler operating days. A separate performance test is completed at the end of each boiler operating day after the initial performance test, and a new 30-day average emission rate for both sulfur dioxide and nitrogen oxides and a new percent reduction of sulfur dioxide are calculated to show compliance with the standards. NR 440.20(6)(f)(f) Initial performance test. For the initial performance test required under s. NR 440.08, compliance with the sulfur dioxide emission limitations and percent reduction requirements under sub. (4) and the nitrogen oxides emission limitation under sub. (5) shall be based on the average emission rates for sulfur dioxide, nitrogen oxides, and percent reduction for sulfur dioxide for the first 30 successive boiler operating days. The initial performance test is the only test in which at least 30 days prior notice is required unless otherwise specified by the department. The initial performance test shall be scheduled so that the first boiler operating day of the 30 successive boiler operating days is completed within 60 days after achieving the maximum production rate at which the affected facility will be operated, but not later than 180 days after initial startup of the facility. NR 440.20(6)(g)(g) Compliance calculations for SO2 and NOx. Compliance shall be determined by calculating the arithmetic average of all hourly emission rates for SO2 and NOx for the 30 successive boiler operating days, except for data obtained during startup, shutdown, malfunction (NOx only) or emergency conditions (SO2 only). Compliance with the percentage reduction requirement for SO2 shall be determined based on the average inlet and average outlet SO2 emission rates for the 30 successive boiler operating days. NR 440.20(6)(h)(h) Quantity of emission data below minimum. If an owner or operator has not obtained the minimum quantity of emission data as required under sub. (7), compliance of the affected facility with the emission requirements under subs. (4) and (5) for the day on which the 30-day period ends may be determined by the department by following the applicable procedures in section 7.0 of Method 19, 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17. NR 440.20(6)(i)(i) Compliance provisions for sources subject to sub. (5) (d) 1. The owner or operator of an affected facility subject to sub. (5) (d) 1. (new source constructed after July 7, 1997) shall calculate NOx emissions by multiplying the average hourly NOx output concentration measured according to the provisions of sub. (7) (c) by the average hourly flow rate measured according to the provisions of sub. (7) (L) and divided by the average hourly gross energy output measured according to the provisions of sub. (7) (k). NR 440.20(6)(j)(j) Compliance provisions for duct burners subject to sub. (5) (a) 1. To determine compliance with the emissions limits for NOx required by sub. (5) (a) for duct burners used in combined cycle systems, the owner or operator of an affected duct burner shall use one of the following procedures: NR 440.20(6)(j)1.1. Conduct the performance test required under s. NR 440.08 using the appropriate methods in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1). Compliance with the emissions limits under sub. (5) (a) 1. shall be determined on the average of 3 (nominal 1-hour) runs for the initial and subsequent performance tests. During the performance test, one sampling site shall be located in the exhaust of the turbine prior to the duct burner. A second sampling site shall be located at the outlet from the heat recovery steam generating unit. Measurements shall be taken at both sampling sites during the performance test. NR 440.20(6)(j)2.2. Use the continuous emission monitoring system specified under sub. (7) for measuring NOx and oxygen and meet the requirements of sub. (7). Data from a CEMS certified or recertified according to the provisions of 40 CFR 75.20, meeting the QA and QC requirements of 40 CFR 75.21, and validated according to 40 CFR 75.23, may be used. The sampling site shall be located at the outlet from the steam generating unit. The NOx emission rate at the outlet from the steam generating unit shall constitute the NOx emission rate from the duct burner of the combined cycle system. NR 440.20(6)(k)(k) Compliance provisions for duct burners subject to sub. (5) (d) 1. To determine compliance with the emissions limits for NOx required by sub. (5) (d) 1. for duct burners used in combined cycle systems, either of the procedures described in subd. 1. or 2. shall be used. where
E is the emission rate of NOx from the duct burner, ng/J (lb/Mwh) gross output
Csg is the average hourly concentration of NOx exiting the steam generating unit, ng/dscm (lb/dscf)
Cte is the average hourly concentration of NOx in the turbine exhaust upstream from duct burner, ng/dscm (lb/dscf)
Qsg is the average hourly volumetric flow rate of exhaust gas from steam generating unit, dscm/hr (dscf/hr)
Qte is the average hourly volumetric flow rate of exhaust gas from combustion turbine, dscm/hr (dscf/hr)
Osg is the average hourly gross energy output from steam generating unit, J (Mwh)
h is the average hourly fraction of the total heat input to the steam generating unit derived from the combustion of fuel in the affected duct burner
NR 440.20(6)(k)1.b.b. Use Method 7E in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), to determine the NOx concentrations (Csg and Cte). Use Method 2, 2F or 2G in 40 CFR part 60, Appendix A, as appropriate, to determine the volumetric flow rates (Qsg and Qte) of the exhaust gases. The volumetric flow rate measurements shall be taken at the same time as the concentration measurements. NR 440.20(6)(k)1.c.c. Develop, demonstrate and provide information satisfactory to the department to determine the average hourly gross energy output from the steam generating unit, and the average hourly percentage of the total heat input to the steam generating unit derived from the combustion of fuel in the affected duct burner.