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9VAC25-260-70. Maximum hourly temperature change.

The maximum hourly temperature change shall not exceed 2C, except in the case of Class VI waters (natural trout waters) where it shall not exceed 0.5C. These criteria shall apply beyond the boundaries of mixing zones and are in addition to temperature changes caused by natural conditions.

Statutory Authority

62.1-44.15(3a) of the Code of Virginia.

Historical Notes

Derived from VR680-21-01.7, eff. May 20, 1992; amended, Virginia Register Volume 14, Issue 4, eff. December 10, 1997.


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