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

Affected: IC 13-15; IC 13-17

Sec. 4. (a) Except as provided in sections 3(d) and 8.5 of this rule, the owner or operator shall meet the monitoring system certification and other requirements of section 3(b) or 8.5(e) of this rule on or before the applicable dates in this section. The owner or operator shall record, report, and quality assure the data from the monitoring systems under section 3(b)(1) or 8.5(e) of this rule on and after the following dates:

1. (1) For units that commenced operation before August 26, 2018, by August 26, 2018.
2. (2) For the owner or operator of a large affected unit that commences operation after August 26, 2018, and that reports on an annual basis under section 8(b) of this rule, by one hundred eighty (180) calendar days after the date on which the unit commences commercial operation.

3. (3) For the owner or operator of a large affected unit that commences operation after August 26, 2018, and that reports on a control period basis under section 8(b) of this rule, by the later of the following dates:

   1. (A) One hundred eighty (180) calendar days after the date on which the unit commences commercial operation.
   2. (B) If the compliance date under clause (A) is not during an ozone control period, then by May 1 immediately following the compliance date under clause (A).

4. (4) For the owner or operator of a large affected unit for which construction of a new stack or flue or installation of add-on NOx emission controls is completed after August 26, 2018, and that reports on an annual basis under section 8(b) of this rule, by the earlier of the following dates:

   1. (A) One hundred eighty (180) calendar days after the date on which emissions first exit to the atmosphere through the new stack or flue or add-on NOx emissions controls.
   2. (B) Ninety (90) unit operating days after the date on which emissions first exit to the atmosphere through the new stack or flue or add-on NOx emissions controls.

5. (5) For the owner or operator of a large affected unit for which construction of a new stack or flue or installation of add-on NOx emission controls is completed after August 26, 2018, and that reports on a control period basis under section 8(b) of this rule, by the later of the following dates:

   1. (A) The earlier of:

      1. (i) one hundred eighty (180) calendar days after the date on which emissions first exit to the atmosphere through the new stack or flue or add- on NOx emissions controls; or
      2. (ii) ninety (90) unit operating days after the date on which emissions first exit to the atmosphere through the new stack or flue or add-on NOx emissions controls.
   2. (B) If the compliance date under clause (A) is not during an ozone control period, May 1 immediately following the compliance date under clause (A).

(b) The owner or operator of a large affected unit that does not meet the applicable compliance date set forth in subsection (a) for any monitoring system under section 3 of this rule shall, for each monitoring system, determine, record, and report maximum potential or, as appropriate, minimum potential, values for the following:

1. (1) NOx emission rate.
2. (2) NOx concentration.
3. (3) Stack gas moisture content.
4. (4) Stack gas flow rate.
5. (5) Fuel flow rate.

6. (6) Any other parameters required to determine NOx mass emissions and heat input in accordance with the following, as applicable:

   1. (A) 40 CFR 75.31(b)(2)*.
   2. (B) 40 CFR 75.31(c)(3)*.
   3. (C) 40 CFR 75, Appendix D, Section 2.4*.
   4. (D) 40 CFR 75, Appendix E, Section 2.5*.

*These documents are incorporated by reference. Copies may be obtained from the Government Publishing Office, www.gpo.gov, or are available for review at the Indiana Department of Environmental Management, Office of Legal Counsel, Indiana Government Center North, 100 North Senate Avenue, Thirteenth Floor, Indianapolis, Indiana 46204.

(Air Pollution Control Division; 326 IAC 10-2- 4; filed Jul 27, 2018, 2:25 p.m.: 20180822-IR-326150414FRA; filed Sep 14, 2021, 8:47 a.m.: 20211013-IR- 326190589FRA; readopted filed Oct 18, 2024, 2:09 p.m.: 20241113-IR-326230809RFA)