020-2 Wyo. Code R. § 2-6
(a) The level of the 8-hour primary and secondary ambient air quality standards for ozone (O3) is 0.070 parts per million (ppm, which is 1 part in 1,000,000), daily maximum 8-hour average, measured by a reference method based on Appendix D to 40 CFR part 50 and designated in accordance with 40 CFR part 53 or an equivalent method designated in accordance with 40 CFR part 53.
(b) The 8-hour primary and secondary standard ozone ambient air quality standards are met at an ambient air quality monitoring site when the 3-year average of the annual fourth-highest daily maximum 8-hour average ozone concentration is less than or equal to 0.070 ppm, as determined in accordance with 40 CFR part 50, Appendix P.
020-2 Wyo. Code R. § 2-6
Amended, Eff. 10/13/2015.
Amended, Eff. 12/20/2016.
Amended, Eff. 2/5/2018.