3745-1-06 Mixing zones.

(A) Non-thermal

(1) Pursuant to Chapter 3745-2 of the Administrative Code, where necessary to attain or maintain the use designated for a surface water by these water quality standards, the director may establish, as a term of a discharge permit issued pursuant to Chapter 3745-33 of the Administrative Code or a permit to install issued pursuant to Chapter 3745-31 of the Administrative Code, a mixing zone applicable to the non-thermal constituents of the point source discharge authorized by such permit.

(2) For lakes and reservoirs (except lake Erie) defined as state resource waters by rule 3745-1-05 of the Administrative Code, no mixing zone shall be permitted.

(B) Thermal

(1) Pursuant to Chapter 3745-2 of the Administrative Code, the director may establish, as a term of a discharge permit issued pursuant to Chapter 3745-33 of the Administrative Code or a permit to install issued pursuant to Chapter 3745-31 of the Administrative Code, a mixing zone applicable to the thermal component of the point source discharge authorized by such permit.

(2) For all watercourses classified as coldwater habitat or exceptional warmwater habitat in rules 3745-1-08 to 3745-1-32 of the Administrative Code, thermal mixing zones will not be permitted.

(3) For lakes and reservoirs (except lake Erie), classified as state resource waters in rule 3745-1-05 of the Administrative Code, no thermal mixing zone shall be permitted.

R.C. 119.032 review dates: 03/29/2007 and 03/29/2012

Promulgated Under: 119.03

Statutory Authority: 6111.041

Rule Amplifies: 6111.041

Prior Effective Dates: 2/14/1978, 4/4/1985, 5/1/1990, 10/31/1997