Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 725 - 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 725.981 - Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
As used in this Subpart CC, all terms not defined in this
				  Section will have the meanings given to them in section 1004 of RCRA,
				  incorporated by reference in 35 Ill. Adm. Code
				  720.111, and 35 Ill.
				  Adm. Code 720 through 728.
"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
				  Section
				  725.984.
"Closure device" means a cap, hatch, lid, plug, seal, valve,
				  or other type of fitting that blocks an opening in a cover so 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 emissions
				  to the atmosphere. A cover may have openings (such as access hatches, sampling
				  ports, and gauge wells) that are necessary for operation, inspection,
				  maintenance, or repair of the unit on which the cover is used. A cover may be a
				  separate piece of equipment that 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 a hazardous waste being 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 that 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 that 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 (1.2 inches
				  H2O at 68 °F); and the total concentration of the
				  pure organic constituents having a vapor pressure greater than 0.3 kPa at 20
				  °C (1.2 inches H2O at 68 °F) 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. A failure that
				  is caused in part by poor maintenance or careless operation is not a
				  malfunction.
"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 CC, maximum
				  organic vapor pressure is determined using the procedures specified in Section
				  725.984(c).
"Metallic shoe seal" means a continuous seal that is
				  constructed of metal sheets that are held vertically against the wall of the
				  tank by springs, weighted levers, or other mechanisms and that 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
				  725.984(d).
"Point of waste origination" means as follows:
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 35 Ill. Adm. Code 721.
BOARD 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 federal
				  Clean Air Act in 40 CFR 60 (Standards of Performance for New Stationary
				  Sources), 61 (National Emission Standards for Hazardous Air Pollutants), and 63
				  (National Emission Standards for Hazardous Air Pollutants for Source
				  Categories).
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 Section
				  725.983(c)(2)
				  exits the treatment process. Any waste determination must 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 that
				  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 CC, 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
				  so 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 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 Section 725.984. 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
				  x10-6
				  atmospheres/gram-mole/m3) at 25 °C (77 °F)
				  must be included. Appendix F 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 Section
				  725.984
				  to determine whether a hazardous waste meets standards specified in this
				  Subpart CC. Examples of a waste determination include performing the procedures
				  in accordance with the requirements of Section
				  725.984
				  to determine the average VO concentration of a hazardous waste at the point of
				  waste origination, determining 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 determining 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 9095B
				  (Paint Filter Liquids Test) in "Test Methods for Evaluating Solid Waste,
				  Physical/Chemical Methods", USEPA publication number EPA-530/SW-846,
				  incorporated by reference in 35 Ill. Adm. Code
				  720.111(a).
				  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 addition of absorbent
				  materials to the surface of a waste to absorb free liquid without mixing,
				  agitation, or subsequent curing.