Ill. Admin. Code tit. 35, § 255.120 - Applicability

a) Conformity determinations for Federal actions related to transportation plans, programs, and projects developed, funded, or approved under Title 23 U.S.C. or the Federal Transit Act ( 49 U.S.C. 1601 et seq.) are not subject to the requirements of this Part.

b) For Federal actions not covered by subsection (a) of this Section and not exempt pursuant to Section 255.170 of this Part, a conformity determination is required for each pollutant where the total of direct and indirect emissions in a nonattainment or maintenance area caused by a Federal action would equal or exceed any of the rates in subsection (b)(1) or (b)(2) of this Section:

1) Nonattainment Areas:

	Tons/Year
Ozone (VOC's or NOx):
Serious NAA's	50
Severe NAA's	25
Extreme NAA's	10
Other ozone NAA's outside an ozone transport region	100
Marginal and moderate NAA's inside an ozone transport region:
VOC	50
NOx	100
Carbon monoxide:
All NAA's	100
SO2 or NO2:
All NAA's	100
PM-10:
Moderate NAA's	100
Serious NAA's	70
Pb:
All NAA's	25

2) Maintenance Areas:

	Tons/Year
Ozone (NOx) SO2 or NO2:
All maintenance areas	100
Ozone (VOC's):
Maintenance areas inside an ozone transport region	50
Maintenance areas outside an ozone transport region	100
Carbon monoxide:
All maintenance areas	100
PM-10:
All maintenance areas	100
Pb:
All maintenance areas	25

Notes

Ill. Admin. Code tit. 35, § 255.120