35 Ill. Adm. Code 204.230
Allowable Emissions
Section 204.230 Allowable Emissions
"Allowable emissions" means the emissions rate of
a stationary source calculated using the maximum rated capacity of the source
(unless the source is subject to federally enforceable limits that restrict the
operating rate, or hours of operation, or both) and the most stringent of the
following:
a) The
applicable standards as set forth in 40 CFR 60, 61, 62 and 63 (incorporated by
reference in Section 204.100);
b) The
applicable SIP emissions limitation, including those with a future compliance
date; or
c) The
emissions rate specified as a federally enforceable permit condition, including
those with a future compliance date.