9 Va. Admin. Code § 5-30-15

Current through Register Vol. 41, No. 9, December 16, 2024

Section 9VAC5-30-15 - Reference conditions

All measurements of air quality that are expressed as mass per unit volume (e.g., micrograms per cubic meter) other than for the particulate matter (PM_2.5) standards contained in 9VAC5-30-65, 9VAC5-30-66, and 9VAC5-30-67, and lead standards contained in 9VAC5-30-80 shall be corrected to a reference temperature of 25°C and a reference pressure of 760 millimeters of mercury (1,013.2 millibars). Measurements of PM_2.5 for purposes of comparison to the standards contained in 9VAC5-30-65, 9VAC5-30-66, and 9VAC5-30-67 and of lead for purposes of comparison to the standards contained in 9VAC5-30-80 shall be reported based on actual ambient air volume measured at the actual ambient temperature and pressure at the monitoring site during the measurement period.

9 Va. Admin. Code § 5-30-15

Derived from Virginia Register Volume 23, Issue 21, eff. August 1, 2007; amended, Virginia Register Volume 25, Issue 19, eff. June 24, 2009; Volume 29, Issue 17, eff. May 22, 2013.

Statutory Authority

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