35 Ill. Adm. Code 204.560
Potential to Emit
Section 204.560 Potential to Emit
"Potential to emit" means the maximum capacity of
a stationary source to emit a pollutant under its physical and operational
design. Any physical or operational limitation on the capacity of the source
to emit a pollutant, including air pollution control equipment and restrictions
on hours of operation or on the type or amount of material combusted, stored,
or processed,
shall
be treated as part of its design
if the limitation or the effect it would have on emissions is federally
enforceable or legally and practicably enforceable by a state or local air
pollution control agency. Secondary emissions do not count in determining the
potential to emit of a stationary source.