Current through Register Vol. 48, No. 38, September 20, 2024
a) "Major
modification" means any physical change in or change in the method of operation
of a major stationary source that would result in:
1) A significant emissions increase (as
defined in Section 204.670) of a regulated NSR pollutant (as defined in
Section 204.610) other than GHGs (as defined in Section 204.430);
and
2) A significant net emissions
increase of that pollutant from the major stationary source.
b) Any significant emissions
increase (as defined in Section 204.670) from any emissions units or net
emissions increase (as defined in Section 204.550) at a major stationary
source that is significant for VOM or NOx shall be
considered significant for ozone.
c) A physical change or change in the method
of operation shall not include:
1) Routine
maintenance, repair and replacement;
2) Use of an alternative fuel or raw material
by reason of:
A) An order under sections 2(a)
and (b) of the Energy Supply and Environmental Coordination Act of 1974
(15 USC
791) (or any superseding legislation);
or
B) A natural gas curtailment
plan under the Federal Power Act (16 USC
791);
3) Use of an alternative fuel by reason of an
order or rule under section 125 of the CAA ( 42 USC 7435);
4) Use of an alternative fuel at a steam
generating unit to the extent that the fuel is generated from municipal solid
waste;
5) Use of an alternative
fuel or raw material by a stationary source that:
A) The source was capable of accommodating
before January 6, 1975, unless the change would be prohibited under any
federally enforceable permit condition established after January 6, 1975 under
40 CFR
52.21, this Part, or 35 Ill. Adm. Code
201.142
or
201.143;
or
B) The source is approved to use
under any permit issued under
40 CFR
52.21, this Part, or 35 Ill. Adm. Code
201.142
or 201.143;
6) An
increase in the hours of operation or in the production rate, unless such
change would be prohibited under any federally enforceable permit condition
established after January 6, 1975, under
40 CFR
52.21, this Part, or 35 Ill. Adm. Code
201.142
or 201.143;
7) Any change in
ownership at a stationary source;
8) The installation, operation, cessation, or
removal of a temporary clean coal technology demonstration project, provided
that the project complies with:
A) The
Illinois SIP; and
B) Other
requirements necessary to attain and maintain NAAQS during the project and
after it is terminated; or
9) The installation or operation of a
permanent clean coal technology demonstration project that constitutes
repowering, provided that the project does not result in an increase in the
potential to emit of any regulated pollutant emitted by the unit. This
exemption shall apply on a pollutant-by-pollutant basis.
d) This definition shall not apply with
respect to a particular regulated NSR pollutant when the major stationary
source is complying with Subpart K for a PAL for that pollutant. Instead, the
definition at Section 204.1720 shall apply.
