Colorado § 25-7-204 Exclusions

Colorado Statutes

§ 25-7-204 — Exclusions

Colorado § 25-7-204

Title 25Public

Art.Air Quality Control

This text of Colorado § 25-7-204 (Exclusions) is published on Counsel Stack Legal Research, covering Colorado primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook

Colo. Rev. Stat. § 25-7-204 (2026).

Text

(1)The requirements of the state implementation plan for prevention of significant deterioration of ambient air quality shall not apply to a major stationary source or major modification with respect to a particular pollutant if the owner or operator demonstrates that:

(a)As to the pollutant, the source or modification is subject to part 3 of this article, and the source or modification would impact no area attaining the national ambient air quality standards (either internal or external to areas designated as nonattainment under section 107 of the federal act); or

(b)(Deleted by amendment, L. 92, p. 1229, � 27, effective July 1, 1992.)

(c)Such emissions would be from a temporary activity which will not have an adverse impact on air quality in any class I area or an area wher

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(1) The requirements of the state implementation
plan for prevention of significant deterioration of ambient air quality shall not apply
to a major stationary source or major modification with respect to a particular
pollutant if the owner or operator demonstrates that:

(a) As to the pollutant, the source or modification is subject to part 3 of this
article, and the source or modification would impact no area attaining the national
ambient air quality standards (either internal or external to areas designated as
nonattainment under section 107 of the federal act); or

(b) (Deleted by amendment, L. 92, p. 1229, � 27, effective July 1, 1992.)

(c) Such emissions would be from a temporary activity which will not have an
adverse impact on air quality in any class I area or an area where an allowable
increase over the baseline concentration is known to be violated; except that such
temporary activities shall be subject to requirements related to the employment of
best available control technology; or

(d) Such emissions would not be significant.

(2) The following pollutant concentrations shall be excluded in determining
compliance with maximum allowable increases:

(a) Concentrations attributable to the increase in emissions from sources
which have converted from the use of petroleum products, natural gas, or both, by
reason of an order in effect under section 2(a) and (b) of the federal Energy Supply
and Environmental Coordination Act of 1974 (or any superseding legislation) over
the emissions from such sources before the effective date of such an order, but not
more than five years after the effective date of such an order;

(b) Concentrations attributable to the increase in emissions from sources
which have converted from using natural gas by reason of a natural gas curtailment
plan in effect pursuant to the federal Power Act over the emissions from such
sources before the effective date of such plan but not more than five years after
the effective date of the plan; and

(c) (Deleted by amendment, L. 92, p. 1229, � 27, effective July 1, 1992.)

(d) Concentrations of particulate matter attributable to an increase in
emissions from temporary activity.

Legislative History

Source: L. 79: Entire article R&RE, p. 1053, � 1, effective June 20. L. 81: (1)(c) amended and (1)(d) and (2) added, p. 1308, �� 4, 5, effective May 29. L. 92: (1)(b), (2)(b), and (2)(c) amended, p. 1229, � 27, effective July 1.