Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 724 - STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES › Subpart AA - AIR EMISSION STANDARDS FOR PROCESS VENTS › Section 724.931 - Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
As used in this Subpart AA, all terms not defined in this
				  Subpart AA have the meaning given them in section 1004 of the Resource
				  Conservation and Recovery Act, incorporated by reference in 35 Ill. Adm. Code
				  720.111, and 35 Ill.
				  Adm. Code 720 through 728, and 738.
"Air stripping operation" means a desorption operation
				  employed to transfer one or more volatile components from a liquid mixture into
				  a gas (air) either with or without the application of heat to the liquid.
				  Packed towers, spray towers and bubble-cap, sieve, or valve-type plate towers
				  are among the process configurations used for contacting the air and a
				  liquid.
"Bottoms receiver" means a container or tank used to receive
				  and collect the heavier bottoms fractions of the distillation feed stream that
				  remain in the liquid phase.
"Btu" means British thermal unit.
"Closed-vent system" means a system that is not open to the
				  atmosphere and that is composed of piping, connections, and, if necessary,
				  flow-inducing devices that transport gas or vapor from a piece or pieces of
				  equipment to a control device.
"Condenser" means a heat-transfer device that reduces a
				  thermodynamic fluid from its vapor phase to its liquid phase.
"Connector" means flanged, screwed, welded, or other joined
				  fittings used to connect two pipelines or a pipeline and a piece of equipment.
				  For the purposes of reporting and recordkeeping, "connector" means flanged
				  fittings that are not covered by insulation or other materials that prevent
				  location of the fittings.
"Continuous recorder" means a data-recording device recording
				  an instantaneous data value at least once every 15 minutes.
"Control device" means an enclosed combustion device, vapor
				  recovery system, or flare. Any device the primary function of which is the
				  recovery or capture of solvents or other organics for use, reuse, or sale
				  (e.g., a primary condenser on a solvent recovery unit) is not a control
				  device.
"Control device shutdown" means the cessation of operation of
				  a control device for any purpose.
"Distillate receiver" means a container or tank used to
				  receive and collect liquid material (condensed) from the overhead condenser of
				  a distillation unit and from which the condensed liquid is pumped to larger
				  storage tanks or other process units.
"Distillation operation" means an operation, either batch or
				  continuous, separating one or more feed streams into two or more exit streams,
				  each exit stream having component concentrations different from those in the
				  feed streams. The separation is achieved by the redistribution of the
				  components between the liquid and vapor phase as they approach equilibrium
				  within the distillation unit.
"Double block and bleed system" means two block valves
				  connected in series with a bleed valve or line that can vent the line between
				  the two block valves.
"Equipment" means each valve, pump, compressor, pressure
				  relief device, sampling connection system, open-ended valve or line, flange or
				  other connector, and any control devices or systems required by this Subpart
				  AA.
"First attempt at repair" means to take rapid action for the
				  purpose of stopping or reducing leakage of organic material to the atmosphere
				  using best practices.
"Flame zone" means the portion of the combustion chamber in a
				  boiler occupied by the flame envelope.
"Flow indicator" means a device that indicates whether gas
				  flow is present in a vent stream.
"Fractionation operation" means a distillation operation or
				  method used to separate a mixture of several volatile components of different
				  boiling points in successive stages, each stage removing from the mixture some
				  proportion of one of the components.
"ft" means foot.
"h" means hour.
"Hazardous waste management unit shutdown" means a work
				  practice or operational procedure that stops operation of a hazardous waste
				  management unit or part of a hazardous waste management unit. An unscheduled
				  work practice or operational procedure that stops operation of a hazardous
				  waste management unit or part of a hazardous waste management unit for less
				  than 24 hours is not a hazardous waste management unit shutdown. The use of
				  spare equipment and technically feasible bypassing of equipment without
				  stopping operation are not hazardous waste management unit shutdowns.
"Hot well" means a container for collecting condensate as in
				  a steam condenser serving a vacuum-jet or steam-jet ejector.
"In gas-vapor service" means that the piece of equipment
				  contains or contacts a hazardous waste stream that is in the gaseous state at
				  operating conditions.
"In heavy liquid service" means that the piece of equipment
				  is not in gas-vapor service or in light liquid service.
"In light liquid service" means that the piece of equipment
				  contains or contacts a waste stream where the vapor pressure of one or more of
				  the organic components in the stream is greater than 0.3 kilopascals (kPa) at
				  20 °C, the total concentration of the pure organic components having a
				  vapor pressure greater than 0.3 kPa at 20 °C is equal to or greater than 20
				  percent by weight, and the fluid is a liquid at operating conditions.
"In situ sampling systems" means nonextractive samplers or
				  in-line samplers.
"In vacuum service" means that equipment is operating at an
				  internal pressure that is at least 5 kPa below ambient pressure.
"Kg" means kilogram.
"kPa" means kilopascals.
"lb" means pound.
"m" means meter.
"Mg" means Megagrams, or metric tonnes.
"MJ" means Megajoules, or ten to the sixth Joules.
"MW" means Megawatts.
"Malfunction" means any sudden failure of a control device or
				  a hazardous waste management unit or failure of a hazardous waste management
				  unit to operate in a normal or usual manner, so that organic emissions are
				  increased.
"Open-ended valve or line" means any valve, except a pressure
				  relief valve, that has one side of the valve seat in contact with hazardous
				  waste and one side open to the atmosphere, either directly or through open
				  piping.
"ppmv" means parts per million by volume.
"ppmw" means parts per million by weight.
"Pressure release" means the emission of materials resulting
				  from the system pressure being greater than the set pressure of the pressure
				  relief device.
"Process heater" means a device that transfers heat liberated
				  by burning fuel to fluids contained in tubes, including all fluids except water
				  that are heated to produce steam.
"Process vent" means any open-ended pipe or stack that is
				  vented to the atmosphere either directly, through a vacuum-producing system, or
				  through a tank (e.g., distillate receiver, condenser, bottoms receiver, surge
				  control tank, separator tank, or hot well) associated with hazardous waste
				  distillation, fractionation, thin-film evaporation, solvent extraction, or air
				  or steam stripping operations.
"Repaired" means that equipment is adjusted or otherwise
				  altered to eliminate a leak.
"s" means second.
"Sampling connection system" means an assembly of equipment
				  within a process or waste management unit that is used during periods of
				  representative operation to take samples of the process or waste fluid.
				  Equipment that is used to take non-routine grab samples is not considered a
				  sampling connection system.
"scm" means standard cubic meter.
"scft" means standard cubic foot.
"Sensor" means a device that measures a physical quantity or
				  the change in a physical quantity, such as temperature, pressure, flow rate,
				  pH, or liquid level.
"Separator tank" means a device used for separation of two
				  immiscible liquids.
"Solvent extraction operation" means an operation or method
				  of separation in which a solid or solution is contracted with a liquid solvent
				  (the two being mutually insoluble) to preferentially dissolve and transfer one
				  or more components into the solvent.
"Startup" means the setting in operation of a hazardous waste
				  management unit or control device for any purpose.
"Steam stripping operation" means a distillation operation in
				  which vaporization of the volatile constituents of a liquid mixture takes place
				  by the introduction of steam directly in to the charge.
"Surge control tank" means a large-sized pipe or storage
				  reservoir sufficient to contain the surging liquid discharge of the process
				  tank to which it is connected.
"Thin-film evaporation operation" means a distillation
				  operation that employs a heating surface consisting of a large diameter tube
				  that may be either straight or tapered, horizontal or vertical. Liquid is
				  spread on the tube wall by a rotating assembly of blades that maintain a close
				  clearance from the wall or actually ride on the film of liquid on the
				  wall.
"USDOT" means the United States Department of
				  Transportation.
"Vapor incinerator" means any enclosed combustion device that
				  is used for destroying organic compounds and does not extract energy in the
				  form of steam or process heat.
"Vented" means discharged through an opening, typically an
				  open-ended pipe or stack, allowing the passage of a stream of liquids, gases,
				  or fumes into the atmosphere. The passage of liquids, gases, or fumes is caused
				  by mechanical means, such as compressors or vacuum-producing systems, or by
				  process-related means, such as evaporation produced by heating, and not caused
				  by tank loading and unloading (working losses) or by natural means, such as
				  diurnal temperature changes.
"yr" means year.