(b) “Benchmark apportionment” means a point of reference against which the ozone
control period NOx emissions from a NOx budget source affected unit will be compared
to if the state exceeds its ozone season budget of 2,209 tons.
(c) “Commence operation” means to have begun any mechanical, chemical, or
electronic process, including, with regard to a unit, start-up of a unit's combustion
chamber. Except as provided in R 336.1802(2) for a unit that is a NOx budget unit under
R 336.1802(1) on the date of commencement of operation, the date remains the unit's
date of commencement of operation even if the unit is subsequently modified,
reconstructed, or repowered. Except as provided in R 336.1802(2), for a unit that is not a
NOx budget unit under R 336.1802(1) on the date of commencement of operation, the
date the unit becomes a NOx budget unit under R 336.1802(1) is the unit's date of
commencement of operation.
(d) “Continuous Emission Monitoring System” (CEMS) means the equipment used to
sample, analyze, measure, and provide, by means of readings taken at least once every 15
minutes, using an automated data acquisition and handling system (DAHS), a permanent
record of NOx emissions, stack gas volumetric flow rate or stack gas moisture content, as
applicable, in a manner consistent with 40 CFR part 75 or 40 CFR part 60, appendices B
and F, as applicable.
(e) “Department” means the department of environment, Great Lakes, and energy.
(f) “Emissions” means air pollutants exhausted from a unit or source into the
atmosphere, as measured, recorded, and reported to the administrator by the NOx
authorized account representative or responsible official.
(g) “EPA” means the United States environmental protection agency.
(h) “Fossil fuel” means natural gas, petroleum, coal, or any form of solid, liquid, or
gaseous fuel derived from natural gas, petroleum, or coal.
(i) “Generator” means a device that produces electricity.
(j) “Heat input” means, with regard to a specified period to time, the product, in
million Btu/time, of the gross calorific value of the fuel, in Btu/pound, divided by
1,000,000 Btu/million Btu and multiplied by the fuel feed rate into a combustion device,
in pounds of fuel/time, as measured, recorded, and reported to the administrator by the
NOx authorized account representative or responsible official. Heat input does not
include the heat derived from preheated combustion air, recirculated flue gases, or
exhaust from other sources.
(k) “Maximum design heat input” means the ability of a unit to combust a stated
maximum amount of fuel per hour, in million Btu/hour, on a steady state basis, as
determined by the physical design and physical characteristics of the unit.
(l) “Maximum potential hourly heat input” means an hourly heat input, in million
Btu/hour, used for reporting purposes when a unit lacks certified monitors to report heat
input for any unit that uses 40 CFR part 75 to comply with this part. If the unit intends to
use 40 CFR part 75, appendix D, to report heat input, this value should be calculated, in
accordance with 40 CFR part 75, using the maximum fuel flow rate and the maximum
gross calorific value. If the unit intends to use a flow monitor and a diluent gas monitor,
this value should be reported, in accordance with 40 CFR part 75, using the maximum
potential flowrate and either the maximum carbon dioxide concentration, in CO2, or the
minimum oxygen concentration, in percent O2.