9VAC25-260-70
9VAC25-260-70. Maximum hourly temperature change
Cite as 9 Va. Admin. Code § 25-260-70
The maximum hourly temperature change shall not exceed 2°C, except in the case of Class VI waters (natural trout waters) where it shall not exceed 0.5°C. These criteria shall apply beyond the boundaries of mixing zones and are in addition to temperature changes caused by natural conditions.