020-2 Wyo. Code R. § 2-5 - Ambient standards for carbon monoxide

(a) The ambient air standard for carbon monoxide, measured by nondispersive infrared spectrometry, as described in 40 CFR part 50, Appendix C, or by an equivalent method designated in accordance with 40 CFR part 53, is:

(i) 10 milligrams per cubic meter (9 ppm) - maximum 8-hour concentration not to be exceeded more than once per year;

(ii) 40 milligrams per cubic meter (35 ppm) - maximum 1-hour concentration not to be exceeded more than once per year.

Notes

020-2 Wyo. Code R. § 2-5

Amended, Eff. 10/13/2015. Amended, Eff. 12/20/2016. Amended, Eff. 2/5/2018.