South Carolina Code of Regulations › Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL › Subchapter 61-79 - Hazardous Waste Management Regulations › Part 61-79.265 - INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES › Subpart CC - AIR EMISSION STANDARDS FOR TANKS, SURFACE IMPOUNDMENTS, AND CONTAINERS › Section 61-79.265.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 Act and parts 260 through 266 of this
					 chapter.
"Average volatile organic concentration" or "average VO
					 concentration" means the mass-weighted average volatile organic concentration
					 of a hazardous waste as determined in accordance with the requirements of
					 265.1084 of this subpart.
"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 waste 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.
"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 waste 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 or more of the organic constituents in the material is greater
					 than 0.3 kilopascals (kPa) at 20°C; and the total concentration of the pure
					 organic constituents having a vapor pressure greater than 0.3 kPa at 20°C is
					 equal to or greater than 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 waste 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.
"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 wastes, 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 265.1084(c) of
					 this subpart.
"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
					 265.1084(d) of this subpart.
"Point of waste origination" means as follows:
(1) When the facility owner or operator is
				  the generator of the hazardous waste, the point of waste origination means the
				  point where a solid waste produced by a system, process, or waste management
				  unit is determined to be a hazardous waste as defined in part 261.
[Note: 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 for waste management operations under authority of the Clean Air
					 Act in 40 CFR parts 60, 61, and 63.]
(2) When the facility owner and operator are
				  not the generator of the hazardous waste, point of waste origination means the
				  point where the owner or operator accepts delivery or takes possession of the
				  hazardous waste.
"Point of waste treatment" means the point where a
					 hazardous waste to be treated in accordance with 265.1083(c)(2) of this subpart
					 exits the treatment process. Any waste determination shall be made before the
					 waste is conveyed, handled, or otherwise managed in a manner that allows the
					 waste to volatilize to the atmosphere.
"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 owner or
					 operator 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
					 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 waste 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 waste expressed in terms of parts per million (ppmw) as determined by
					 direct measurement or by knowledge of the waste in accordance with the
					 requirements of 265.1084 of this subpart. For the purpose of determining the VO
					 concentration of a hazardous waste, 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 x
					 10-6
					 atmospheres/gram-mole/m3) at 25 degrees Celsius must
					 be included. Appendix VI of this subpart presents a list of compounds known to
					 have a Henry's law constant value less than the cutoff level.
"Waste determination" means performing all applicable
					 procedures in accordance with the requirements of 265.1084 of this subpart to
					 determine whether a hazardous waste meets standards specified in this subpart.
					 Examples of a waste determination include performing the procedures in
					 accordance with the requirements of 265.1084 of this subpart to determine the
					 average VO concentration of a hazardous waste at the point of waste
					 origination; the average VO concentration of a hazardous waste at the point of
					 waste treatment and comparing the results to the exit concentration limit
					 specified for the process used to treat the hazardous waste; the organic
					 reduction efficiency and the organic biodegradation efficiency for a biological
					 process used to treat a hazardous waste and comparing the results to the
					 applicable standards; or the maximum volatile organic vapor pressure for a
					 hazardous waste in a tank and comparing the results to the applicable
					 standards.
"Waste stabilization process" means any physical or
					 chemical process used to either reduce the mobility of hazardous constituents
					 in a hazardous waste or eliminate free liquids as determined by Test Method
					 9095 (Paint Filter Liquids Test) in "Test Methods for Evaluating Solid Waste,
					 Physical/Chemical Methods," EPA Publication No. SW-846, Third Edition,
					 September 1986, as amended by Update I, November 15, 1992 (incorporated by
					 reference-refer to 260.11 of this chapter). A waste stabilization process
					 includes mixing the hazardous waste with binders or other materials, and curing
					 the resulting hazardous waste and binder mixture. Other synonymous terms used
					 to refer to this process are "waste fixation" or "waste solidification." This
					 does not include the adding of absorbent materials to the surface of a waste,
					 without mixing, agitation, or subsequent curing, to absorb free
					 liquid.