Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 204 - PREVENTION OF SIGNIFICANT DETERIORATION
Subpart B - DEFINITIONS
Section 204.660 - Significant
Current through Register Vol. 48, No. 38, September 20, 2024
a) "Significant" means, in reference to a net emissions increase or the potential of a source to emit any of the following pollutants, a rate of emissions that would equal or exceed any of the following rates:
|
Pollutant and Emissions Rate |
|
|
Carbon monoxide |
100 tpy |
|
NOX |
40 tpy |
|
SO2 |
40 tpy |
|
PM |
25 tpy of particulate matter emissions |
|
PM10 |
15 tpy |
|
PM2.5 |
10 tpy of direct PM2.5 emissions; 40 tpy of SO2 emissions; 40 tpy of NOX emissions unless demonstrated not to be a PM2.5 precursor under Section 204.610(a)(2)(C) |
|
Ozone |
40 tpy of VOM or NOX |
|
Lead |
0.6 tpy |
|
Fluorides |
3 tpy |
|
Sulfuric acid mist |
7 tpy |
|
Hydrogen sulfide (H2S) |
10 tpy |
|
Total reduced sulfur (including H2S) |
10 tpy |
|
Reduced sulfur compounds (including H2S) |
10 tpy |
|
GHGs |
75,000 tpy CO2e |
|
Municipal waste combustor organics (measured as total tetra-through octa-chlorinated dibenzo-p-dioxins and dibenzofurans) |
3.2 x10-6 megagrams per year (3.5 x10-6 tpy) |
|
Municipal waste combustor metals (measured as PM) |
14 megagrams per year (15 tpy) |
|
Municipal waste combustor acid gases (measured as SO2 and hydrogen chloride) |
36 megagrams per year (40 tpy) |
|
Municipal solid waste landfills emissions (measured as nonmethane organic compounds) |
45 megagrams per year (50 tpy) |
|
Ozone depleting substances |
100 tpy |
b) "Significant" means, in reference to a net emissions increase or the potential of a source to emit a regulated NSR pollutant that subsection (a) does not list, any emissions rate.
c) Notwithstanding subsection (a), "significant" means any emissions rate or any net emissions increase associated with a major stationary source or major modification that would construct within 10 kilometers of a Class I area, and have an impact on that area equal to or greater than 1 µg/m3 (24-hr average).
