Indiana Administrative Code › Title 326 - AIR POLLUTION CONTROL DIVISION › Article 7 - SULFUR DIOXIDE RULES › Rule 4 - Emission Limitations and Requirements by County › Section 4-10 - Warrick County sulfur dioxide emission limitations

Current through July 10, 2024
Authority: IC 13-14-8; IC 13-17-3
Affected: IC 13-15; IC 13-17; IC 13-22
Sec. 10.
(a) The
				following sources and facilities located in Warrick County shall comply with
				the sulfur dioxide emission limitations in pounds per million Btu, unless
				otherwise specified, and other requirements:
(1) Southern Indiana Gas and Electric Company
				(SIGECO)
Facility Description
Emission Limitations
(A) Culley Units 1, 2, and 3
Beginning December 31, 1989
5.41 each
Beginning August 1, 1991 (Units 1 and 2 only)
2.79 each
(B) As an
				alternative to the emission limitations specified in clause (A), beginning
				August 1, 1991, sulfur dioxide emissions from Culley Units 1 and 2 shall be
				limited as follows:
Facility Description
Emission Limitations
Unit 1
0.0006
Unit 2
4.40
(C)
				SIGECO shall notify the department and the U.S. EPA via certified mail at least
				fourteen (14) days prior to its intention to rely on the set of limits in
				clause (B) or to switch between sets of limits listed in clauses (A) and (B).
(D) For the purposes of 326 IAC
				7-2-1(e)(1), during thirty (30) day periods in which SIGECO relies on more than
				one (1) set of limits contained in clauses (A) and (B), a separate thirty (30)
				day rolling weighted average for each set of limits shall be determined. Each
				thirty (30) day rolling weighted average shall be based on data from the
				previous thirty (30) operational days within the last ninety (90) days for that
				set of limits. If SIGECO does not operate thirty (30) days under any one (1)
				set of limits within the last ninety (90) days, the rolling weighted average
				shall be based on all operational days within the last ninety (90) days for
				that set of limits.
(E) Units 2 and
				3 shall maintain a thirty (30) day rolling average sulfur dioxide
				(SO2) removal efficiency of at least ninety-five percent
				(95%) using continuous emissions monitoring system (CEMS) data from both the
				inlet and outlet of the control device determined in accordance with 40 CFR 75
				*. A thirty (30) day rolling average sulfur dioxide
				(SO2) removal efficiency means the percent reduction in
				the mass of a pollutant achieved by a unit's pollution control device over a
				thirty (30) day period using the thirty (30) day rolling average emission rate.
				A thirty (30) day rolling average emission rate shall be determined by
				calculating an arithmetic average of all hourly emission rates in lb/MMBtu for
				the current day and the previous twenty-nine (29) operating days. A new thirty
				(30) day rolling average emission rate shall be calculated for each new
				operating day. Each thirty (30) day rolling average emission rate shall include
				all startup, shutdown, and malfunction periods within an operating
				day.
(F) SIGECO shall continuously
				operate the flue gas desulfurization system (FGD) serving Units 2 and 3 at all
				times the units are in operation. Following startup of the units, SIGECO need
				not operate the FGD until either unit is fired with any coal. In the event of a
				planned FGD outage, SIGECO may continue to operate Unit 2, but shall burn down
				the coal existing in the Unit 2 bunker to the extent practicable, and, prior to
				shutting down the FGD, load compliance coal into the bunker for use until such
				time as the FGD resumes operation. In the event of an unplanned FGD outage,
				SIGECO shall feed compliance coal to the Unit 2 bunker until such time as the
				FGD resumes operation. Compliance coal is defined as two (2.0) lb/MMBtu
				SO2, as demonstrated by a four (4) hour composite sample
				of the feed stock.