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 CC - AIR EMISSION STANDARDS FOR TANKS AND CONTAINERS › Section 61-79.261.CC.1081 - 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 to them in the South Carolina Hazardous Waste Management
					 Act and R.61-79.260 through 266.
"Average volatile organic concentration or average VO
					 concentration"
means the mass-weighted average volatile organic
					 concentration of a hazardous secondary material as determined in accordance
					 with the requirements of section 261.1084.
"Closure device"
means a cap, hatch, lid,
					 plug, seal, valve, or other type of fitting that blocks an opening in a cover
					 such that when the device is secured in the closed position it prevents or
					 reduces air pollutant emissions to the atmosphere. Closure devices include
					 devices that are detachable from the cover (e.g., a sampling port cap),
					 manually operated (e.g., a hinged access lid or hatch), or automatically
					 operated (e.g., a spring-loaded pressure relief valve).
"Continuous seal"
means a seal that forms a
					 continuous closure that completely covers the space between the edge of the
					 floating roof and the wall of a tank. A continuous seal may be a vapor-mounted
					 seal, liquid-mounted seal, or metallic shoe seal. A continuous seal may be
					 constructed of fastened segments so as to form a continuous seal.
"Cover"
means a device that provides a
					 continuous barrier over the hazardous secondary material managed in a unit to
					 prevent or reduce air pollutant emissions to the atmosphere. A cover may have
					 openings (such as access hatches, sampling ports, gauge wells) that are
					 necessary for operation, inspection, maintenance, and repair of the unit on
					 which the cover is used. A cover may be a separate piece of equipment which can
					 be detached and removed from the unit or a cover may be formed by structural
					 features permanently integrated into the design of the unit.
"Empty hazardous secondary material container"
means:
(1) A container from which all hazardous secondary
					 materials have been removed that can be removed using the practices commonly
					 employed to remove materials from that type of container, e.g., pouring,
					 pumping, and aspirating, and no more than 2.5 centimeters (one inch) of residue
					 remain on the bottom of the container or inner liner;
(2) A container that is less than or equal to one hundred
					 nineteen (119) gallons in size and no more than three (3) percent by weight of
					 the total capacity of the container remains in the container or inner liner;
					 or
(3) A container that is greater than one hundred nineteen
					 (119) gallons in size and no more than 0.3 percent by weight of the total
					 capacity of the container remains in the container or inner liner.
"Enclosure"
means a structure that surrounds a
					 tank or container, captures organic vapors emitted from the tank or container,
					 and vents the captured vapors through a closed-vent system to a control
					 device.
"External floating roof"
means a pontoon-type
					 or double-deck type cover that rests on the surface of the material managed in
					 a tank with no fixed roof.
"Fixed roof"
means a cover that is mounted on
					 a unit in a stationary position and does not move with fluctuations in the
					 level of the material managed in the unit.
"Floating membrane cover"
means a cover
					 consisting of a synthetic flexible membrane material that rests upon and is
					 supported by the hazardous secondary material being managed in a surface
					 impoundment.
"Floating roof"
means a cover consisting of a
					 double deck, pontoon single deck, or internal floating cover which rests upon
					 and is supported by the material being contained, and is equipped with a
					 continuous seal.
"Hard-piping"
means pipe or tubing that is
					 manufactured and properly installed in accordance with relevant standards and
					 good engineering practices.
"In light material service"
means the
					 container is used to manage a material for which both of the following
					 conditions apply: The vapor pressure of one (1) or more of the organic
					 constituents in the material is greater than 0.3 kilopascals (kPa) at twenty
					 degrees Celsius (20°C); and the total concentration of the pure organic
					 constituents having a vapor pressure greater than 0.3 kilopascals (kPa) at 20°C
					 is equal to or greater than twenty (20) percent by weight.
"Internal floating roof"
means a cover that
					 rests or floats on the material surface (but not necessarily in complete
					 contact with it) inside a tank that has a fixed roof.
"Liquid-mounted seal"
means a foam or
					 liquid-filled primary seal mounted in contact with the hazardous secondary
					 material between the tank wall and the floating roof continuously around the
					 circumference of the tank.
"Malfunction"
means any sudden, infrequent,
					 and not reasonably preventable failure of air pollution control equipment,
					 process equipment, or a process to operate in a normal or usual manner.
					 Failures that are caused in part by poor maintenance or careless operation are
					 not malfunctions.
"Material determination"
means performing all
					 applicable procedures in accordance with the requirements of section 261.1084
					 to determine whether a hazardous secondary material meets standards specified
					 in this subpart. Examples of a material determination include performing the
					 procedures in accordance with the requirements of section 261.1084 of this
					 subpart to determine the average VO concentration of a hazardous secondary
					 material at the point of material origination; the average VO concentration of
					 a hazardous secondary material at the point of material treatment and comparing
					 the results to the exit concentration limit specified for the process used to
					 treat the hazardous secondary material; the organic reduction efficiency and
					 the organic biodegradation efficiency for a biological process used to treat a
					 hazardous secondary material and comparing the results to the applicable
					 standards; or the maximum volatile organic vapor pressure for a hazardous
					 secondary material in a tank and comparing the results to the applicable
					 standards.
"Maximum organic vapor pressure"
means the sum
					 of the individual organic constituent partial pressures exerted by the material
					 contained in a tank, at the maximum vapor pressure-causing conditions (i.e.,
					 temperature, agitation, pH effects of combining materials, etc.) reasonably
					 expected to occur in the tank. For the purpose of this subpart, maximum organic
					 vapor pressure is determined using the procedures specified in section
					 261.1084(c).
"Metallic shoe seal"
means a continuous seal
					 that is constructed of metal sheets which are held vertically against the wall
					 of the tank by springs, weighted levers, or other mechanisms and is connected
					 to the floating roof by braces or other means. A flexible coated fabric
					 (envelope) spans the annular space between the metal sheet and the floating
					 roof.
"No detectable organic emissions"
means no
					 escape of organics to the atmosphere as determined using the procedure
					 specified in section 261.1084(d).
"Point of material origination"
means as
					 follows:
(1) When the remanufacturer or other person that stores or
					 treats the hazardous secondary material is the generator of the hazardous
					 secondary material, the point of material origination means the point where a
					 material produced by a system, process, or material management unit is
					 determined to be a hazardous secondary material excluded under section
					 261.4(a)(27).
Note to paragraph (1) of the definition of "Point of
					 material origination": In this case, this term is being used in a manner
					 similar to the use of the term "point of generation" in air standards
					 established under authority of the Clean Air Act in 40 CFR parts 60, 61, and
					 63.
(2) When the remanufacturer or other person that stores or
					 treats the hazardous secondary material is not the generator of the hazardous
					 secondary material, point of material origination means the point where the
					 remanufacturer or other person that stores or treats the hazardous secondary
					 material accepts delivery or takes possession of the hazardous secondary
					 material.
"Safety device"
means a closure device such as
					 a pressure relief valve, frangible disc, fusible plug, or any other type of
					 device which functions exclusively to prevent physical damage or permanent
					 deformation to a unit or its air emission control equipment by venting gases or
					 vapors directly to the atmosphere during unsafe conditions resulting from an
					 unplanned, accidental, or emergency event. For the purpose of this subpart, a
					 safety device is not used for routine venting of gases or vapors from the vapor
					 headspace underneath a cover such as during filling of the unit or to adjust
					 the pressure in this vapor headspace in response to normal daily diurnal
					 ambient temperature fluctuations. A safety device is designed to remain in a
					 closed position during normal operations and open only when the internal
					 pressure, or another relevant parameter, exceeds the device threshold setting
					 applicable to the air emission control equipment as determined by the
					 remanufacturer or other person that stores or treats the hazardous secondary
					 material based on manufacturer recommendations, applicable regulations, fire
					 protection and prevention codes, standard engineering codes and practices, or
					 other requirements for the safe handling of flammable, ignitable, explosive,
					 reactive, or hazardous materials.
"Single-seal system"
means a floating roof
					 having one (1) continuous seal. This seal may be vapor-mounted, liquid-mounted,
					 or a metallic shoe seal.
"Vapor-mounted seal"
means a continuous seal
					 that is mounted such that there is a vapor space between the hazardous
					 secondary material in the unit and the bottom of the seal.
"Volatile organic concentration"
or
"VO
					 concentration"
means the fraction by weight of the volatile organic
					 compounds contained in a hazardous secondary material expressed in terms of
					 parts per million by weight (ppmw) as determined by direct measurement or by
					 knowledge of the material in accordance with the requirements of section
					 261.1084. For the purpose of determining the VO concentration of a hazardous
					 secondary material, organic compounds with a Henry's law constant value of at
					 least 0.1 mole-fraction-in-the-gas-phase/mole-fraction-in the liquid-phase (0.1
					 Y/X) (which can also be expressed as 1.8 ×
					 10-6atmospheres/gram-mole/m3)
					 at twenty-five degrees Celsius (25°C) must be included.