Section 327IAC15-2-6. Exclusions

   (a) Except as provided in subsection (b), an individual NPDES permit issued under 327 IAC 5 is required for a discharge:

(1) to a receiving stream identified as an:

(A) outstanding state resource water; or

(B) outstanding national resource water;

as defined under IC 13-11-2-149.6 or IC 13-11-2-149.5, respectively; or

(2) that would significantly lower the water quality as defined under 327 IAC 2-1.3-2(50) of such a water downstream of the discharge.

  (b) A discharge to an outstanding national resource water or outstanding state resource water that consists only of storm water may be permitted under this article if the commissioner determines the discharge will not significantly lower the water quality as defined under 327 IAC 2-1.3-2(50) of such a water downstream of that discharge. (Water Pollution Control Division; 327 IAC 15-2-6; filed Aug 31, 1992, 5:00 p.m.: 16 IR 17; filed Jan 14, 1997, 12:00 p.m.: 20 IR 1476; filed Oct 27, 2003, 10:15 a.m.: 27 IR 830; filed May 29, 2012, 3:19 p.m.: 20120627-IR-327080764FRA; filed Nov 10, 2014, 1:51 p.m.: 20141210-IR-327130290FRA; filed Oct 9, 2015, 4:07 p.m.: 20151104-IR-327100659FRA)