35 Ill. Adm. Code 202.107
Allowable Emissions
Section 202
Section 202.107 Allowable
Emissions
a) "Allowable emissions" means the emission rate of an
emission source calculated using the maximum rated capacity of the emission
source (unless the emission source is subject to permit conditions or other
enforceable limits that restrict the operating rate, or hours of operation, or
both) and the more stringent of the following:
1) The applicable emission standard or limitation contained in
this Chapter, including those with a future compliance date; or
2) The emissions rate specified as a permit condition, including
those with a future compliance date.
b) The allowable emissions may be expressed as a permit condition
limiting annual emissions or material or fuel throughput.
c) If an emission source is not subject to an emission standard
under subsection (a) and is not conditioned pursuant to subsection (b), the
allowable emissions will be the source's potential to emit.