9 Va. Admin. Code § 5-30-57 – Ozone (8-hour, 0.070 ppm).

A. The primary and secondary ambient air quality standard is 0.070 parts per million, daily maximum 8-hour average.
B. Ozone shall be 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.
C. The primary and secondary 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 Appendix U to 40 CFR Part 50.

§ 10.1-1308 of the Code of Virginia; §§ 108, 109, and 302 of the federal Clean Air Act; 40 CFR Parts 50, 53, and 58.of the Code of Virginia.

Derived from Virginia Register Volume 32, Issue 18, eff. June 1, 2016.