A. The primary ambient air quality standards for carbon monoxide are:
1. Nine parts per million (ten milligrams per cubic meter) for an eight-hour average concentration not to be exceeded more than once per year; and
2. Thirty-five parts per million (forty milligrams per cubic meter) for a one-hour average concentration not to be exceeded more than once per year.
B. The levels of carbon monoxide in the ambient air shall be measured by:
1. A reference method based on 40 CFR 50, Appendix C, and designated in accordance with 40 CFR 53; or
2. An equivalent method designated in accordance with 40 CFR 53.
(Ord. 1993-128 § 2 (part), 1993)