South Carolina Code of Regulations › Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL › Subchapter 61-79 - Hazardous Waste Management Regulations › Part 61-79.264 - STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES › Subpart AA - AIR EMISSION STANDARDS FOR PROCESS VENTS › Section 61-79.264.AA.1031 - Definitions

Current through Register Vol. 48, No. 6, June 28, 2024
As used in this subpart, all terms not defined herein shall
					 have the meaning given them in the Act and parts 260-266.
Air stripping operation is 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 bubblecap, sieve, or valvetype 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.
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 stream(s) into two or more exit
					 streams, each exit stream having component concentrations different from those
					 in the feed stream(s). 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, or flange
					 or other connector, and any control devices or systems required by this
					 subpart.
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.
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.
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.
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 vacuumjet or steamjet 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 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
					 inline samplers.
In vacuum service means that equipment is operating at an
					 internal pressure that is at least 5 Kpa below ambient pressure.
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 pressure
					 relief valves, having one side of the valve seat in contact with hazardous
					 waste and one side open to the atmosphere, either directly or through open
					 piping.
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 openended 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, thinfilm evaporation, solvent extraction, or air
					 or steam stripping operations.
Repaired means that equipment is adjusted, or otherwise
					 altered, to eliminate a leak.
Sampling connection system means an assembly of equipment
					 within a process or waste management unit used during periods of representative
					 operation to take samples of the process or waste fluid. Equipment used to take
					 non-routine grab samples is not considered a sampling connection system.
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 contacted 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 into 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.
Thinfilm 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.
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
					 openended 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.