35 Ill. Adm. Code 202.201
Emission Baseline for Alternative Control Strategies
Section 202
Section 202.201 Emission
Baseline for Alternative Control Strategies
a) The baseline for reviewing decreases or increases of emissions
from emission sources which are the subject of an ACS shall be the lesser of
the actual emissions or the allowable emissions prescribed by this Chapter.
b) Notwithstanding subsection (a), an increment of emission
reduction shall be creditable under an ACS to the extent that it:
1) Was achieved as a result of the installation of pollution
control equipment, changes in process, procedures, or materials, or the
shutdown of an emission source which would not have occurred but for the
purpose of creating an emission reduction;
2) Reduced emissions beyond the requirements of Board
regulations; and
3) Was not relied upon in the State Implementation Plan (SIP)
demonstration to demonstrate compliance with ambient air quality standards in
the compliance year in nonattainment areas or maintenance of air quality in
other areas.
c) For purposes of subsection (b), the burden shall generally be
on the permit applicant. However, for the purpose of subsection (b)(3) it
shall be the responsibility of the Agency to demonstrate that the SIP
demonstration either did or did not rely upon the emission reduction in
question, whether from the particular emission source or the category to which
it belongs.
d) Notwithstanding subsection (b)(3), if an emission source is
located in an area for which the SIP does not demonstrate attainment of the air
quality standards by the compliance year for the pollutant which is the subject
of the ACS, it may utilize an emission reduction credit only to the extent that
that reduction reduces its emissions below actual emissions.