No owner or other person shall cause or permit to be discharged into the atmosphere from any affected facility any gases that contain sulfur dioxide in excess of 29 parts per million by volume or 25% of the potential sulfur dioxide emission concentration (75% reduction by weight or volume), corrected to 7.0% oxygen (dry basis), whichever is less stringent. Compliance with this emission limit is based on a 24-hour daily geometric mean.
9 Va. Admin. Code § 5-40-8020
Statutory Authority
§ 10.1-1308 of the Code of Virginia.