Section 327IAC5-22-4. Classification of wastewater treatment plants; nonindustrial treatment plants

   A nonindustrial wastewater treatment plant shall be classified into one (1) of five (5) classifications based on the design population equivalent of the plant according to the following:

(1) Class I-SP includes all waste stabilization ponds, whether controlled discharge or continuous discharge, regardless of flow.

(2) Class I includes wastewater treatment plants having a design population equivalent of less than two thousand (2,000).

(3) Class II includes wastewater treatment plants having a design population equivalent:

(A) equal to or greater than two thousand (2,000); and

(B) less than ten thousand (10,000).

(4) Class III includes wastewater treatment plants having a design population equivalent:

(A) equal to or greater than ten thousand (10,000); and

(B) less than or equal to forty thousand (40,000).

(5) Class IV includes wastewater treatment plants having a design population equivalent greater than forty thousand (40,000).

(Water Pollution Control Division; 327 IAC 5-22-4; filed Nov 20, 2000, 4:07 p.m.: 24 IR 964; readopted filed Aug 17, 2006, 10:31 a.m.: 20060830-IR-327060183BFA; filed Mar 18, 2008, 2:55 p.m.: 20080416-IR-327060179FRA; readopted filed Jul 30, 2014, 4:04 p.m.: 20140827-IR-327140189BFA)