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´
=
   Equation 7
where:
Hgallowable is the mass of mercury emissions allowed for the compliance year
Fuel Hgannual is the mass of mercury in fuel combusted during the compliance year as determined in sub. (3) (b).
Hg CE is the applicable requirement for percent mercury emission reduction divided by 100.
NR 446.18(5)(a)2.2. For a mercury output emission limitation, Equation 8.
´
=
   Equation 8
where:
Hgallowable is the mass of mercury emissions in pounds allowed for the compliance year
GEOGWh is the annual gross energy output during the compliance year as determined in sub. (4) (c)
ELoutput is the applicable mercury output based emission limitation in pounds per GWh
NR 446.18(5)(a)3.3. For an NOx or SO2 emission limitation, Equation 9.
´
=
å
=
   Equation 9
where:
Pallowable is the mass of NOx or SO2 emissions allowed for the compliance year
HIi is the amount of fuel, in mmBtu combusted each hour i, during the compliance year
h is the number of hours fuel is combusted during the compliance year
ELp is the applicable emission limitation of s. NR 446.14 (1) for NOx or SO2
NR 446.18(5)(b)(b) When achieving compliance using unit averaging as allowed under s. NR 446.13 (2) (b) or 446.14 (2) (b), according to Equation 10:
å
=
=
   Equation 10
where:
Unit Averaging Pallowable is the mass of mercury, NOx, or SO2 emissions allowed for each pollutant determined in par. (a) for each EGU participating in emissions averaging during the compliance year
Pu is the lowest annual allowable mass of mercury, NOx or SO2 emissions allowed for the compliance year for each EGU as determined under par. (a) or applicable under any other enforceable state or federal requirement for each EGU participating in emissions averaging during the compliance year
n is the number of EGUs participating in emissions averaging
NR 446.18 HistoryHistory: CR 07-036: cr. Register November 2008 No. 635, eff. 12-1-08.
NR 446.185NR 446.185 Compliance alternatives.
NR 446.185(1)(1) Alternative annual allowable mercury emissions.
NR 446.185(1)(a)(a) Owners and operators of a coal-fired EGU affected by this subchapter may use baseline mercury emissions approved by the department as an alternative to procedures in s. NR 446.18 (5) (a) in determining annual allowable mercury emissions.
NR 446.185(1)(b)(b) Baseline mercury emissions shall be determined and used for calculating annual allowable mercury emissions for 5-year periods beginning with the period of 2016 to 2020. Baseline mercury emissions shall be determined every 5 years and used to calculate annual allowable mercury emissions for the subsequent 5-year period.
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