NR 440.20(4)(g)(g) Compliance with the emission limitation and percent reduction requirements under this subsection are both determined on a 30-day rolling average basis except as provided under par. (c).
NR 440.20(4)(h)(h) When different fuels are combusted simultaneously, the applicable standard is determined by proration using the following formula:
NR 440.20(4)(h)1.1. If emissions of sulfur dioxide to the atmosphere are greater than 260 ng/J (0.60 lb/million Btu) heat input:
Es = [340 x + 520 y]/100
and
%Ps = 10
NR 440.20(4)(h)2.2. If emissions of sulfur dioxide to the atmosphere are equal to or less than 260 ng/J (0.60 lb/million Btu) heat input:
Es = [340 x + 520 y]/100
and
%Ps = [10 x + 30 y]/100
where:
Es is the prorated sulfur dioxide emission limit (ng/J heat input)
%Ps is the percentage of potential sulfur dioxide emission allowed
x is the percentage of total heat input derived from the combustion of liquid or gaseous fuels, excluding solid-derived fuels
y is the percentage of total heat input derived from the combustion of solid fuel, including solid-derived fuels
NR 440.20(5)(5)Standard for nitrogen oxides.
NR 440.20(5)(a)(a) On and after the date on which the initial performance test required to be conducted under s. NR 440.08 is completed, no owner or operator subject to the provisions of this section may cause to be discharged into the atmosphere from any affected facility, except as provided under pars. (b) and (d), any gases which contain nitrogen oxides, expressed as NO2, in excess of the following emission limits, based on a 30-day rolling average, except as provided under sub. (6) (j) 1.:
NR 440.20(5)(a)1.1. NOx emission limits.
- See PDF for table PDF
1Exempt from NOx standards and NOx monitoring requirements.
2Any fuel containing less than 25%, by weight, lignite is not prorated but its percentage is added to the percentage of the predominant fuel.
NR 440.20(5)(a)2.2. NOx reduction requirements.
- See PDF for table PDF
NR 440.20(5)(b)(b) The emission limitations under par. (a) do not apply to any affected facility which is combusting coal-derived liquid fuel and is operating under a commercial demonstration permit issued by the administrator in accordance with the provisions of 40 CFR 60.47Da.
NR 440.20(5)(c)(c) Except as provided under par. (d),when 2 or more fuels are combusted simultaneously, the applicable standard is determined by proration using the following formula:
En = [86 w + 130 x + 210 y + 260 z + 340 v] /100
where:
En is the applicable standard for nitrogen oxides when multiple fuels are combusted simultaneously (ng/J heat input)
w is the percentage of total heat input derived from the combustion of fuels subject to the 86 ng/J heat input standard