326 IAC 7-4-15 Pike County sulfur dioxide emission limitations

Sec. 15. (a) On and after January 1, 2017, sources and emission units located in Pike County shall comply with the sulfur dioxide emission limits and other requirements, as follows: Source Emission Unit Description Emission Limit (lbs/hour) or Other Requirements Emission Limit (lbs/MMBtu) (1) Indianapolis Power & (A) Unit 1 330.0 0.15 Light - Petersburg (B) Unit 2 621.6 0.15 Generating Station (C) Unit 3 2,049.8 0.37 Source ID No. 00002 (D) Unit 4 1,942.5 0.35 (E) Diesel Generators PB-2, PB-3, and PB-4 500 hour calendar year operating limit (each) (2) Hoosier Energy - Ratts (A) Boiler 1 58 0.05 Source ID No. 00001 (B) Boiler 2 58 0.05 (C) No. 2 Auxiliary Boiler 1 0.05 (b) Compliance with the emission limits in subsection (a) shall be determined by using quality assured hourly average continuous emission monitoring system data, except as allowed under subsection (c). (c) As an alternative to the emission limits in subsection (a)(1)(A) though (a)(1)(D), Indianapolis Power & Light - Petersburg Generating Station may comply with the following: Emission Unit Description Emission Limit (lbs/hour - 30 day rolling average) Emission Limit (lbs/MMBtu - 30 day rolling average) (1) Unit 1 263.0 0.12 (2) Unit 2 495.4 0.12 (3) Unit 3 1,633.7 0.29 (4) Unit 4 1,548.2 0.28 (d) Compliance with the emission limits in subsection (c) shall be determined by calculating the thirty (30) boiler operating day rolling arithmetic average emission rate at the end of each boiler operating day using all of the quality assured hourly average continuous emission monitoring system data for the previous thirty (30) boiler operating days. Boiler operating day means a twenty-four (24) hour period that begins at midnight and ends the following midnight during which any fuel is combusted at any time in the boiler. It is not necessary for the fuel to be combusted the entire twenty-four (24) hour period. (e) Indianapolis Power & Light shall notify the department prior to the compliance date to indicate if compliance for Units 1 through 4 will be determined using the emission limits in subsection (a) or subsection (c) and prior to switching from compliance with the set of emission limits in subsection (a) to subsection (c) or from subsection (c) to subsection (a). Indianapolis Power & Light may not switch between complying with the one (1) hour average limits in subsection (a) and the thirty (30) day rolling average limits in subsection (c) unless Indianapolis Power & Light continues to show compliance with the one (1) hour average limit for each boiler until the first thirty (30) boiler operating day rolling arithmetic average emission rate is calculated.