Authority: IC 13-14-8; IC 13-17

Affected: IC 13-15

Sec. 1. (a) This rule establishes emission limitations for particulate emissions from manufacturing processes located anywhere in the state.

(b) The following manufacturing processes are exempt from this rule:

1. (1) Combustion for indirect heating.
2. (2) Incineration.
3. (3) Open burning.
4. (4) Existing foundry cupolas' manufacturing processes that are subject to the requirements of 326 IAC 11-1.
5. (5) Surface coating using dip coating.
6. (6) Surface coating using roll coating.
7. (7) Surface coating using flow coating.
8. (8) Surface coating using brush coating.
9. (9) Welding, provided that less than six hundred twenty-five (625) pounds of rod or wire is consumed per day.
10. (10) Torch cutting, provided that less than three thousand four hundred (3,400) inches per hour of stock one (1) inch thickness or less is cut.
11. (11) Noncontact cooling tower systems.
12. (12) Applications of aerosol coating products to repair minor surface damage and imperfections.
13. (13) Trivial activities as defined at 326 IAC 2-7-1(39).
14. (14) Manufacturing processes with potential emissions less than five hundred fifty-one thousandths (0.551) pound per hour.
15. (15) Surface coating manufacturing processes, not otherwise exempt in subdivisions (5) through (8), that use less than five (5) gallons per day.

(c) This rule shall not apply if a particulate matter limitation that is as stringent as or more stringent than the particulate limitation established in this rule is established in:

1. (1) 326 IAC 2-2-3, concerning prevention of significant deterioration (PSD) best available control technology (BACT) determinations contained in a permit;
2. (2) 326 IAC 2-3-3, concerning lowest achievable emission rate (LAER) determinations contained in a permit;
3. (3) 326 IAC 6.5 and 326 IAC 6.8, concerning particulate matter emissions;
4. (4) 326 IAC 11, concerning existing emission limitations for specific operations;
5. (5) 326 IAC 12, concerning new source performance standards; or
6. (6) 326 IAC 20, concerning national emission standards for hazardous air pollutants.

(Air Pollution Control Division; 326 IAC 6-3-1; filed Mar 10, 1988, 1:20 p.m.: 11 IR 2499; filed Apr 22, 1997, 2:00 p.m.: 20 IR 2367; filed May 13, 2002, 11:30 a.m.: 25 IR 3051; errata filed Oct 19, 2005, 4:28 p.m.: 29 IR 819; filed Mar 21, 2012, 11:27 a.m.: 20120418-IR-326070438FRA; errata filed Jan 2, 2013, 2:19 p.m.: 20130123-IR-326130002ACA; readopted filed Oct 18, 2024, 2:09 p.m.: 20241113-IR-326230809RFA; errata filed Jun 3, 2025, 1:59 p.m.: 20250618-IR-326250285ACA)