NR 440.207(3)(b)1.a.a. Cause to be discharged into the atmosphere from that affected facility any gases that contain SO2 in excess of 20% (0.20) of the potential SO2 emission rate (80% reduction); nor NR 440.207(3)(b)1.b.b. Cause to be discharged into the atmosphere from that affected facility any gases that contain SO2 in excess of 520 ng/J (1.2 lb/million Btu) heat input. If coal is fired with coal refuse, the affected facility is subject to par. (a). If oil or any other fuel, except coal, is fired with coal refuse, the affected facility is subject to the 90% SO2 reduction requirement specified in par. (a) and the emission limit determined pursuant to par. (e) 2. NR 440.207(3)(b)2.2. Combusts only coal and that uses an emerging technology for the control of SO2 emissions may neither: NR 440.207(3)(b)2.a.a. Cause to be discharged into the atmosphere from that affected facility any gases that contain SO2 in excess of 50% (0.50) of the potential SO2 emission rate, 50% reduction; nor NR 440.207(3)(b)2.b.b. Cause to be discharged into the atmosphere from that affected facility any gases that contain SO2 in excess of 260 ng/J (0.60 lb/million Btu) heat input. If coal is combusted with other fuels, the affected facility is subject to the 50% SO2 reduction requirement specified in this paragraph and the emission limit determined pursuant to par. (e) 2. NR 440.207(3)(c)(c) On and after the date on which the initial performance test is completed or required to be completed under s. NR 440.08, whichever date comes first, no owner or operator of an affected facility that combusts coal, alone or in combination with any other fuel, and is listed in subd. 1., 2., 3. or 4. may cause to be discharged into the atmosphere from that affected facility any gases that contain SO2 in excess of the emission limit determined pursuant to par. (e) 2. Percent reduction requirements are not applicable to affected facilities under this paragraph. NR 440.207(3)(c)1.1. Affected facilities that have a heat input of 22 MW (75 million Btu/hr) or less. NR 440.207(3)(c)2.2. Affected facilities that have an annual capacity for coal of 55% (0.55) or less and are subject to a federally enforceable requirement limiting operation of the affected facility to an annual capacity factor for coal of 55% (0.55) or less. NR 440.207(3)(c)4.4. Affected facilities that combust coal in a duct burner as part of a combined cycle system where 30% (0.30) or less of the heat entering the steam generating unit is from combustion of coal in the duct burner and 70% (0.70) or more of the heat entering the steam generating unit is from exhaust gases entering the duct burner. NR 440.207(3)(d)(d) On and after the date on which the initial performance test is completed or required to be completed under s. NR 440.08, whichever date comes first, no owner or operator of an affected facility that combusts oil may cause to be discharged into the atmosphere from that affected facility any gases that contain SO2 in excess of 215 ng/J (0.50 lb/million Btu) heat input; or, as an alternative, no owner or operator of an affected facility that combusts oil shall combust oil in the affected facility that contains greater than 0.5 weight percent sulfur. The percent reduction requirements are not applicable to affected facilities under this paragraph. NR 440.207(3)(e)(e) On and after the date on which the initial performance test is completed or required to be completed under s. NR 440.08, whichever date comes first, no owner or operator of an affected facility that combusts coal, oil, or coal and oil with any other fuel may cause to be discharged into the atmosphere from that affected facility any gases that contain SO2 in excess of the following: NR 440.207(3)(e)1.1. The percent of potential SO2 emission rate required under par. (a) or (b) 2., as applicable, for any affected facility that: NR 440.207(3)(e)2.2. The emission limit determined according to the following formula for any affected facility that combusts coal, oil, or coal and oil with any other fuel: Es = (KaHa + KbHb + KcHc)/(Ha + Hb + Hc)
where:
Es is the SO2 emission limit, expressed in ng/J or lb/million Btu heat input
Ka is 520 ng/J (1.2 lb/million Btu)
Kb is 260 ng/J (0.60 lb/million Btu)
Kc is 215 ng/J (0.50 lb/million Btu)
Ha is the heat input from the combustion of coal, except coal combusted in an affected facility subject to par. (b) 2., in joules (J) (million Btu)
Hb is the heat input from the combustion of coal, in an affected facility subject to par. (b) 2., in J (million Btu)
Hc is the heat input from the combustion of oil, in J (million Btu)
NR 440.207(3)(f)(f) Reduction in the potential SO2 emission rate through fuel pretreatment is not credited toward the percent reduction requirement under par. (b) 2. unless: NR 440.207(3)(f)1.1. Fuel pretreatment results in a 50% (0.50) or greater reduction in the potential SO2 emission rate; and NR 440.207(3)(f)2.2. Emissions from the pretreated fuel, without either combustion or post-combustion SO2 control, are equal to or less than the emission limits specified under par. (b) 2.