Section 203.104 Actual Emissions

Section 203

Section 203.104  Actual

Emissions

"Actual Emissions"

means the actual rate of annual emissions of a pollutant from an emissions unit

as of a particular date.  Actual emissions are equal to the average rate, in

tons per year, at which the emissions unit actually emitted the pollutant

during the two-year period which immediately precedes the particular date or

such other period which is determined by the Illinois Environmental Protection

Agency (Agency) to be representative of normal source operation.  Actual

emissions shall be calculated using the unit's actual operating hours,

production rates, and types of materials processed, stored or combusted during

the selected time period; however:

a)         The Agency shall allow the use of a different time period upon

a demonstration by the applicant to the Agency that the time period is more

representative of normal source operation.  Such demonstration may include, but

need not be limited to, operating records or other documentation of events or

circumstances indicating that the preceding two years is not representative of

normal source operations.

b)         The Agency may presume in the absence of reliable data on

actual emissions that the source-specific allowable emissions for the emissions

unit are equivalent to the actual emissions of the emissions unit.

c)         For any emissions unit which has not begun normal operations

on the particular date, the Agency shall presume that the potential to emit of

the emissions unit is equivalent to the actual emissions on that date.