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 446.185(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. NR 446.185(1)(c)(c) Baseline mercury emissions for each 5-year period shall be determined using fuel mercury content data measured for the calendar year which is 2 years prior to the first year of the applicable 5-year period. The year designated for measuring fuel mercury content is the baseline determination year. NR 446.185 NoteNote: Baseline emissions are measured for 2013 for determining the annual allowable emissions for compliance years 2015 to 2019, measured for 2018 for determining allowable emissions for compliance years 2020 through 2024, etc.
NR 446.185(1)(d)(d) No later than May 1 of the calendar year after the baseline determination year, the owner or operator of a coal-fired EGU shall submit a report to the department that includes information necessary to determine the baseline mercury emissions for that 5-year period. NR 446.185(1)(e)(e) In the report required under par. (d), the owners or operators of a coal-fired EGU may request alternative data be used for determining baseline emissions if the data for the specified year is not representative of the EGU’s normal operations or maintenance schedule. NR 446.185(1)(f)(f) Baseline mercury emissions for each EGU shall be determined according to the following procedures: NR 446.185(1)(f)1.1. Measure and determine the fuel mercury content according to requirements of s. NR 446.18 (3) for all fuels combusted in the EGU for the baseline determination year. NR 446.185(1)(f)2.2. Calculate the baseline mercury concentration, on a mmBtu-basis, for the baseline determination year according to Equation 11. where:
BMC is the average baseline mercury concentration of fuel, in pounds per mmBtu, contained in the fuels combusted in the EGU during the baseline determination year
Fuel Hgannual is the total mass of mercury contained in the fuel determined in subd. 1.
HIi is the total amount of fuel, in mmBtu, consumed each hour i, during the baseline determination year
h is the total number of hours fuel is consumed during the baseline determination year
NR 446.185(1)(f)3.3. Calculate the baseline mercury emissions according to Equation 12 as the baseline mercury concentration times the 3-year average of annual fuel consumption, in mmBtu, for the baseline determination year and 2 years prior to the baseline determination year. where:
BME is the baseline mercury emissions for the EGU in pounds
BMC is the baseline mercury concentration for the EGU determined in subd. 2., in pounds per mmBtu.
HIi is the amount of fuel, in mmBtu combusted in the EGU for each hour i during each year y
h is the total number of hours fuel is combusted in the EGU during each year
NR 446.185(1)(g)(g) When determining annual allowable mercury emissions for achieving compliance on a unit-by-unit basis, use one of the following equations as applicable: