Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 225 - CONTROL OF EMISSIONS FROM LARGE COMBUSTION SOURCES › Subpart B - CONTROL OF MERCURY EMISSIONS FROM COAL-FIRED ELECTRIC GENERATING UNITS › Section 225.260 - Out of Control Periods and Data Availability for Emission Monitors

Current through Register Vol. 48, No. 28, July 12, 2024
a) Out of control
				periods must be determined in accordance with Section 1.7 of Appendix
				B.
b) Monitor data availability for
				all EGUs using a CEMS (or an excepted monitoring system) shall be greater than
				or equal to 75 percent; that is, quality assured data must be recorded by a
				certified primary monitor, a certified redundant or non-redundant backup
				monitor, or reference method for that unit at least 75 percent of the time the
				unit is in operation. Monitor data availability must be determined in
				accordance with Section
				1.8
				of Appendix B following initial certification of the required
				CO2, O2, flow monitor, or mercury
				concentration or moisture monitoring systems at a particular unit or stack
				location; monitor data availability shall be determined on a calendar quarterly
				basis until June 30, 2012, and on a rolling 12-month average basis from July 1,
				2012 forward (the first such 12-month period will cover July 1, 2012 through
				June 30, 2013). Compliance with the percent reduction standard in Section
				225.230(a)(1)(B),
				225.233(d)(1)(B)
				or (d)(2)(B),
				225.237(a)(1)(B),
				or
				225.294(c)(2),
				or the emissions concentration standard in Section
				225.230(a)(1)(A),
				225.233(d)(1)(A)
				or (d)(2)(A),
				225.237(a)(1)(A),
				or
				225.294(c)(1),
				can only be demonstrated if the monitor data availability is equal to or
				greater than 75 percent
.
c) Audit Decertification. Whenever both an
				audit of an emissions monitoring system and a review of the initial
				certification or recertification application reveal that any emissions
				monitoring system should not have been certified or recertified because it did
				not meet a particular performance specification or other requirement pursuant
				to Section
				225.250
				or the applicable provisions of Appendix B to this Part, both at the time of
				the initial certification or recertification application submission and at the
				time of the audit, the Agency must issue a notice of disapproval of the
				certification status of such monitoring system. For the purposes of this
				subsection (c), an audit must be either a field audit or an audit of any
				information submitted to the Agency. By issuing the notice of disapproval, the
				Agency revokes prospectively the certification status of the emissions
				monitoring system. The data measured and recorded by the monitoring system must
				not be considered valid quality-assured data from the date of issuance of the
				notification of the revoked certification status until the date and time that
				the owner or operator completes subsequently approved initial certification or
				recertification tests for the monitoring system. The owner or operator shall
				follow the applicable initial certification or recertification procedures in
				Section
				225.250
				for each disapproved monitoring system.