Indiana Administrative Code
Title 326 - AIR POLLUTION CONTROL DIVISION
Article 2 - PERMIT REVIEW RULES
Rule 6 - Emission Reporting
Section 6-2 - Definitions

(1) "Actual emissions" means the emissions in tons per year of any pollutant emitted by an emissions unit for the calendar year.

(2) "Annual process rate" means the actual or estimated annual fuel, process, or solid waste operating rate in a calendar year.

(3) "Ash content" means the inert residual portion of a fuel.

(4) "Capture efficiency" means the percent of the total emissions captured and routed to the air pollution control equipment.

(5) "Control efficiency" means the percent of the total emissions routed to the air pollution control equipment that are destroyed or captured by the air pollution control equipment. The control efficiency includes control equipment downtime and any malfunctions that occurred while the emission unit or units are in operation. If the actual control efficiency during the calendar year is unknown or cannot reasonably be predicted from available data, then the efficiency provided by the manufacturer may be used.

(6) "Control equipment identification code" means the code provided by the department that defines the equipment used to reduce, by destruction or removal, the amount of air pollutants in a gas stream prior to discharge to the ambient air. Examples of destruction or removal are incineration and carbon adsorption.

(7) "Days per week in operation" means the days per week that the emitting process operates averaged over the inventory period.

(8) "Design capacity" means a measure of the size of a point source based on the reported maximum operational capacity of the unit.

(9) "Downtime" means the period of time when the air pollution control equipment is not operational and the process it is controlling is in operation.

(10) "Emission factor" means an estimate of the rate at which a pollutant is released to the atmosphere as the result of some activity, divided by the rate of that activity, such as production rate or throughput.

(11) "Emissions group" means any combination of like emissions units or processes from a single building, adjacent buildings, or areas. Like emissions units or processes will contain emission units with same or similar emission estimating methods or source classification codes.

(12) "Estimated emissions method code" means a code provided by the department that identifies the estimation technique used in the calculation of estimated emissions.

(13) "Fugitive emissions" has the meaning set forth in 326 IAC 2-7-1(18).

(14) "Heat content" means the amount of thermal heat energy in a solid, liquid, or gaseous fuel.

(15) "Hours per day in operation" means hours per day that the emitting process operated averaged over the days in operation in the calendar year.

(16) "Maximum nameplate capacity" means a measure of a unit's size that the manufacturer puts on the unit's nameplate.

(17) "Oxides of nitrogen" or "NOx" means all oxides of nitrogen, including, but not limited to, nitrogen oxide and nitrogen dioxide, but excluding nitrous oxide, collectively expressed as molecular weight of nitrogen dioxide.

(18) "Percent annual throughput" means the weighted percent of yearly activity for the following quarters:

(19) "Potential to emit" has the meaning set forth in 326 IAC 2-7-1.

(20) "Process rate" means a quantity per unit time of any raw material or process intermediate consumed, or product generated through the use of any equipment, source operation, or process. For a stationary internal combustion unit or any other fuel burning equipment, this term means the quantity of fuel burned per unit time.

(21) "Responsible official" has the meaning set forth in 326 IAC 2-7-1.

(22) "Sulfur content" means the sulfur content of a fuel, expressed as percent by weight.