Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 225 - CONTROL OF EMISSIONS FROM LARGE COMBUSTION SOURCES › Subpart F - COMBINED POLLUTANT STANDARDS › Appendix B - Continuous Emission Monitoring Systems for Mercury › Exhibit C - Conversion Procedures

Current through Register Vol. 48, No. 28, July 12, 2024
1.
				  Applicability
Use the procedures in this Exhibit to convert measured data
					 from a monitor or continuous emission monitoring system into the appropriate
					 units of the standard.
2.
				  Procedures for Heat Input
Use the following procedures to compute heat input rate to
					 an affected unit (in mmBtu/hr or mmBtu/day):
2.1
Calculate and record heat input rate to an affected unit on
					 an hourly basis. The owner or operator may choose to use the provisions
					 specified in 40 CFR 75.16(e), incorporated by reference in Section 225.140, in
					 conjunction with the procedures provided in Sections 2.4 through 2.4.2 to
					 apportion heat input among each unit using the common stack or common pipe
					 header.
2.2
For an affected unit that has a flow monitor (or approved
					 alternate monitoring system under subpart E of 40 CFR 75, incorporated by
					 reference in Section 225.140, for measuring volumetric flow rate) and a diluent
					 gas (O2 or CO2) monitor, use the
					 recorded data from these monitors and one of the following equations to
					 calculate hourly heat input rate (in mmBtu/hr).
2.2.1
When measurements of CO2
					 concentration are on a wet basis, use the following equation:
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2.2.2
When measurements of CO2
					 concentration are on a dry basis, use the following equation:
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2.2.3
When measurements of O2
					 concentration are on a wet basis, use the following equation:
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2.2.4
When measurements of O2
					 concentration are on a dry basis, use the following equation:
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2.3
Heat Input Summation (for Heat Input Determined Using a
					 Flow Monitor and Diluent Monitor)
2.3.1
Calculate total quarterly heat input for a unit or common
					 stack using a flow monitor and diluent monitor to calculate heat input, using
					 the following equation:
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2.3.2
Calculate total cumulative (year-to-date) heat input for a
					 unit or common stack using a flow monitor and diluent monitor to calculate heat
					 input, using the following equation:
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2.4 Heat Input Rate Apportionment for Units
				  Sharing a Common Stack or Pipe
2.4.1
Where applicable, the owner or operator of an affected unit
					 that determines heat input rate at the unit level by apportioning the heat
					 input monitored at a common stack or common pipe using megawatts must apportion
					 the heat input rate using the following equation:
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2.4.2
Where applicable, the owner or operator of an affected unit
					 that determines the heat input rate at the unit level by apportioning the heat
					 input rate monitored at a common stack or common pipe using steam load must
					 apportion the heat input rate using the following equation:
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2.5 Heat Input Rate Summation for Units with
				  Multiple Stacks or Pipes
The owner or operator of an affected unit that determines
					 the heat input rate at the unit level by summing the heat input rates monitored
					 at multiple stacks or multiple pipes must sum the heat input rates using the
					 following equation:
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					 view image