South Carolina Code of Regulations › Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL › Subchapter 61-79 - Hazardous Waste Management Regulations › Part 61-79.261 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE › Subpart AA - AIR EMISSION STANDARDS FOR PROCESS VENTS › Section 61-79.261.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 South Carolina Hazardous Waste Management
					 Act and R.61-79.260 through 266.
"Air stripping operation"
is a desorption
					 operation employed to transfer one (1) 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.
"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 (2) 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 fifteen (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 (1) or more feed stream(s) into two
					 (2) 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 (2)
					 block valves connected in series with a bleed valve or line that can vent the
					 line between the two (2) 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 (1) of the components.
"Hazardous secondary material management unit
					 shutdown"
means a work practice or operational procedure that stops
					 operation of a hazardous secondary material management unit or part of a
					 hazardous secondary material management unit. An unscheduled work practice or
					 operational procedure that stops operation of a hazardous secondary material
					 management unit or part of a hazardous secondary material management unit for
					 less than twenty-four (24) hours is not a hazardous secondary material
					 management unit shutdown. The use of spare equipment and technically feasible
					 bypassing of equipment without stopping operation are not hazardous secondary
					 material 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 secondary material 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 material stream where the vapor pressure of
					 one (1) or more of the organic components in the stream is greater than 0.3
					 kilopascals (kPa) at twenty degrees Celsius (20°C), the total concentration of
					 the pure organic components having a vapor pressure greater than 0.3
					 kilopascals (kPa) at twenty degrees Celsius (20°C) is equal to or greater than
					 twenty (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 five (5) kilopascals (kPa)
					 below ambient pressure.
"Malfunction"
means any sudden failure of a
					 control device or a hazardous secondary material management unit, or failure of
					 a hazardous secondary material 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 (1) side of the valve seat in contact
					 with hazardous secondary material and one (1) 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 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 secondary material 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.
"Sampling connection system"
means an assembly
					 of equipment within a process or material management unit used during periods
					 of representative operation to take samples of the process or material 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 (2) 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 (1) or more components into the solvent.
"Startup"
means the setting in operation of a
					 hazardous secondary material 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.
"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.
"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.