Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 203 - MAJOR STATIONARY SOURCES CONSTRUCTION AND MODIFICATION
Subpart B - MAJOR STATIONARY SOURCES IN NONATTAINMENT AREAS
Section 203.208 - Net Emission Determination
Current through Register Vol. 48, No. 38, September 20, 2024
A net emissions increase is the amount by which the sum of any increase in actual emissions from a particular physical change or change in method of operation at a source, and any other increases and decreases in actual emissions at the source that are contemporaneous with the particular change and are otherwise creditable, exceeds zero. The following steps determine whether the increase or decrease in emissions is available.
a) Except for increases or decreases in volatile organic material and nitrogen oxide emissions in serious and severe ozone nonattainment areas which are addressed in Section 203.209(b), an increase or decrease in actual emissions is contemporaneous only if it occurs between the date that an increase from a particular change occurs and the date five years before a timely and complete application is submitted for the particular change. It must also occur after either April 24, 1979, or the date the area is designated by the United States Environmental Protection Agency as a nonattainment area for the pollutant, whichever is more recent.
b) An increase or decrease in actual emissions is creditable:
c) A decrease in actual emissions is creditable to the extent that:
d) An increase that results from a physical change at a source occurs when the emissions unit on which construction occurred becomes operational and begins to emit a particular pollutant. Any replacement unit that requires shakedown becomes operational only after a shakedown period not to exceed 180 days.