Section 326 IAC 8-19-2 - DefinitionsAuthority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11
Affected: IC 13-15; IC 13-17
Sec. 2.
The following definitions apply throughout this rule:
(1) "Aggregate" means the summation of all process vents containing VOC within a process.(2) "Batch cycle" means a manufacturing event of an intermediate or product from start to finish in a batch process train.(3) "Batch operation" means a noncontinuous operation in which a discrete quantity or batch of feed is charged into a unit operation within a batch process train and processed at one (1) time. Batch operation includes noncontinuous operations in which the equipment is fed intermittently or discontinuously. Addition of raw material and withdrawal of product do not occur simultaneously in a batch operation. After each batch operation, the equipment is generally emptied before a fresh batch is started.(4) "Batch process train" means the collection of equipment, such as: (D) distillation columns;(K) product separators; configured to produce a specific product or intermediate by a batch operation. A batch process train terminates at the point of storage or product handling of the product or intermediate being produced in the batch process train. Irrespective of the product being produced, a batch process train that is independent of other processes shall be considered a single batch process train for purposes of this rule.
(5) "Boiler" means any enclosed combustion device that extracts useful energy in the form of steam.(6) "Btu" means British thermal unit.(7) "Continuous recorder" means a data recording device that either records: (A) an instantaneous data value at least once every fifteen (15) minutes; or(B) fifteen (15) minute or more frequent block average values.(8) "Control device" means any device or combination of devices designed to recover or destroy VOC vapors received from the process vents. A recovery device that is a required part of the process, for example, but not limited to, condensers operating under reflux conditions, is not a control device.(9) "Emission event" means a discrete period of venting that is associated with a unit operation. For example, a displacement of vapor resulting from the charging of a unit operation with VOC will result in a discrete emission event that will last through the duration of the charge and will have an average flow rate equal to the rate of the charge. The expulsion of expanded unit operation vapor space when the vessel is heated is also an emission event. Both of these examples of emission events and others may occur in the same unit operation during the course of the batch cycle. If the flow rate measurement for any discrete period of venting is zero (0), then the event is not an emission event for purposes of this rule.(10) "Flame zone" means the portion of the combustion chamber in a boiler occupied by the flame envelope. (11) "Incinerator" means any enclosed combustion device that is used for destroying organic compounds. Auxiliary fuel may be used to heat waste gas to combustion temperatures. Any energy recovery section present is not physically formed into one (1) section; rather, the energy recovery system is a separate section following the combustion section and the two are joined by ducting or connections that carry fuel gas.(12) "MmHg" means millimeters of mercury.(13) "Permit" means a permit issued by the commissioner under 326 IAC 2.(14) "Ppmv" means parts per million by volume.(15) "Process vent" means a vent gas stream that is discharged from a unit operation or multiple unit operations within the same batch process train that are manifolded together into a common header. A process vent begins at the inlet to the control device prior to mixing with vent gas streams from other process trains or unrelated operations or, in the absence of a control device, at the point of discharge to the atmosphere. The term does not include exhaust streams from exhaust hood and building ventilation fans that are used to provide ventilation for workers and not to collect and discharge emissions from specific unit operations. Process vents exclude the following:(A) Relief valve discharges.(B) Leaks from equipment.(C) Vents from storage tanks.(D) Vents from transfer or loading operations.(E) Vents from wastewater.(16) "Recovery device" means an individual unit of equipment, such as: (B) a carbon adsorber; or(C) a condenser; capable of and used for the purpose of recovering chemicals for use, reuse, or sale.
(17) "Recovery system" means an individual recovery device or series of such devices applied to the same vent stream.(18) "Scfm" means standard cubic feet per minute.(19) "Standard industrial classification code" or "SIC code" means a series of four (4) digit codes devised by the office of management and budget (OMB) of the federal government to classify establishments according to the type of economic activity in which they are engaged.(20) "Unit operation" means one (1) or more pieces of process equipment used to make a single change to the physical or chemical characteristics of one (1) or more process streams. Equipment used for these purposes includes, but is not limited to, the following: (D) Distillation columns.Air Pollution Control Board; 326 IAC 8-19-2; filed Nov 3, 2009, 3:32 p.m.: 20091202-IR-326090222FRA