Authority: IC 13-14-8; IC 13-15-2; IC 13-17-3-4; IC 13-17-3-11

Affected: IC 13-15; IC 13-17

Sec. 13. (a) The following definitions apply throughout this section:

1. (1) "Boiler" means a device that uses the heat generated from combustion of a fuel or electrical resistance to raise the temperature of water above the boiling point for water at the operating pressure.
2. (2) "Dryer" means a device that uses the heat generated from combustion of a fuel or electrical resistance to drive off volatile compounds by evaporation from materials processed in such a device.
3. (3) "Oven" means a device that uses the heat generated from combustion of a fuel or electrical resistance to cause or expedite a chemical curing process or drive off volatile compounds from material processed in such a device.
4. (4) "Process heater" means a device that uses the heat generated from combustion of a fuel or electrical resistance to heat a material so as to augment or expedite its processing.
5. (5) "Space heater" means a device that uses the heat generated from combustion of a fuel or electrical resistance to heat the air inside a building or otherwise provide comfort heating.
6. (6) "Water heater" means a device that uses the heat generated from combustion of a fuel or electrical resistance to raise the temperature of water below the boiling point for water at the operating pressure.

(b) Any external combustion source, including any combination of boilers, space heaters, ovens, dryers, or water heaters may elect to comply with this section by complying with the requirements of section 1 of this rule and the following:

1. (1) Visible emissions from the source shall not exceed twenty percent (20%) opacity in twenty-four (24) consecutive readings in a six (6) minute period. The opacity shall be determined using 40 CFR 60, Appendix A, Method 9*.

2. (2) Limiting fuel usage for every twelve (12) month period to less than the limits found in:

   1. (A) subsection (f), Table 1 for a single fuel or a combination of two (2) fuels; or
   2. (B) subsection (g), Table 2 for a single fuel or a combination of two (2) fuels.

(c) Sources electing to comply with subsection (b)(2)(A) must be able to demonstrate compliance not later than thirty (30) days after receipt of a written request by the department or U.S. EPA. No other demonstration of compliance shall be required. A source specific operating agreement is not required for these sources.

(d) Sources electing to comply with subsection (b)(2)(B) must:

1. (1) comply with the requirements of section 1 of this rule; and
2. (2) submit a request for a source specific operating agreement.

(e) For sources complying with subsection (b)(2)(B), the following records shall be kept at the source:

1. (1) Monthly hours operated for each combustion unit.
2. (2) Records of annual fuel usage for each combustion unit.
3. (3) Routine maintenance records.

(f) Table 1 limits shall be as follows:

(g) Table 2 limits shall be as follows:

*This document is incorporated by reference. Copies may be obtained from the Government Printing Office, 732 North Capitol Street NW, Washington, D.C. 20401 or are available for review and copying at the Indiana Department of Environmental Management, Office of Air Quality, Indiana Government Center North, Tenth Floor, 100 North Senate Avenue, Indianapolis, Indiana 46204.

(Air Pollution Control Division; 326 IAC 2-9-13; filed May 7, 1997, 4:00 p.m.: 20 IR 2313; errata filed Dec 12, 2002, 3:35 p.m.: 26 IR 1566; filed Aug 26, 2004, 11:30 a.m.: 28 IR 28; readopted filed Oct 22, 2004, 10:35 a.m.: 28 IR 811; filed Sep 28, 2011, 10:56 a.m.: 20111026-IR- 326070286FRA; filed Feb 6, 2012, 2:54 p.m.: 20120307-IR-326090493FRA; readopted filed Oct 18, 2024, 2:09 p.m.: 20241113-IR-326230809RFA)