Excess emissions of nitrogen oxides under Sec. 77.6 of this chapter shall be calculated as follows:
(a) For a unit that is not in an approved averaging plan:
(1) Calculate EEi for each portion of the calendar year that the unit is subject to a different NOX emission limitation:[GRAPHIC] [TIFF OMITTED] TR13AP95.002 where: EEi = Excess emissions for NOX for the portion of
the calendar year (in tons);Rai = Actual average emission rate for the unit (in lb/
mmBtu), determined according to part 75 of this chapter for
the portion of the calendar year for which the applicable
emission limitation Rl is in effect;Rli = Applicable emission limitation for the unit, (in lb/
mmBtu), as specified in Sec. 76.5, 76.6, or 76.7 or as
determined under Sec. 76.10;
[GRAPHIC] [TIFF OMITTED] TR13AP95.003
HI\i\ = Actual heat input for the unit, (in mmBtu), determined according
to part 75 of this chapter for the portion of the calendar
year for which the applicable emission limitation,
Rl, is in effect.
(2) If EEi is a negative number for any portion of the calendar year, the EE value for that portion of the calendar year shall be equal to zero (e.g., if EEi = -100, then EEi = 0).
(3) Sum all EEi values for the calendar year: where: EE = Excess emissions for NOX for the year (in tons);n = The number of time periods during which a unit is subject to
different emission limitations; and
(b) For units participating in an approved averaging plan, when all the requirements under Sec. 76.11(d)(1) are not met,[GRAPHIC] [TIFF OMITTED] TR13AP95.004 where: EE = Excess emissions for NOX for the year (in tons);Rai = Actual annual average emission rate for NOX
for unit i, (in lb/mmBtu), determined according to part 75 of
this chapter;Rli = Applicable emission limitation for unit i, (in lb/
mmBtu), as specified in Sec. 76.5, 76.6, or 76.7;HIi = Actual annual heat input for unit i, mmBtu, determined
according to part 75 of this chapter;n = Number of units in the averaging plan.