Authority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11

Affected: IC 13-17

Sec. 5. (a) All sources having less than twenty-five (25) tons per year of actual emissions (after controls) shall be exempt from the requirements specified in 326 IAC 1-7-3(a).

(b) The requirements specified in 326 IAC 1-7-4 shall not apply to stack heights in existence, or dispersion techniques implemented prior to December 31, 1970.

(c) Asphalt concrete plants are exempted from the requirements specified in 326 IAC 1-7-3.

(d) Stack that commenced construction or modifications that would raise them to GEP formula height prior to October 11, 1983, shall not be required to demonstrate GEP height by fluid modeling or field demonstration.

(Air Pollution Control Division; 326 IAC 1-7-5; filed Mar 10, 1988, 1:20 pm: 11 IR 2384; readopted filed Jan 10, 2001, 3:20 p.m.: 24 IR 1477; readopted filed Oct 18, 2024, 2:09 p.m.: 20241113-IR-326230809RFA)