Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 721 - IDENTIFICATION AND LISTING OF HAZARDOUS WASTE › Subpart CC - AIR EMISSION STANDARDS FOR TANKS AND CONTAINERS › Section 721.981 - Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
As used in this this Subpart CC, all terms not defined in
				  this Section will have the meaning given to them in section 1004 of the federal
				  Resource Conservation and Recovery Act (
				  42 USC
				  6903), incorporated by reference in 35 Ill.
				  Adm. Code
				  720.111, and 35 Ill.
				  Adm. Code 720 through 726.
"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 721.984.
"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 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.
"Empty hazardous secondary material container" means any of
				  the following:
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, or
				  aspirating), and no more than 2.5 centimeters (one inch) of residue remain on
				  the bottom of the container or inner liner;
A container that is less than or equal to 119 gallons (450
				  liters) in size and no more than three percent by weight of the total capacity
				  of the container remains in the container or inner liner; or
A container that is greater than 119 (450 liters) 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 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 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 721.984 to determine
				  whether a hazardous secondary material meets standards specified in this
				  Subpart CC. Examples of a material determination include performing the
				  procedures in accordance with the requirements of Section 721.984 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 CC, maximum
				  organic vapor pressure is determined using the procedures specified in Section
				  721.984(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
				  721.984(d).
"Point of material origination" means as follows:
Where 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 when a
				  material produced by a system, process, or material management unit is
				  determined to be a hazardous secondary material excluded under Section
				  721.104(a)(27).
BOARD NOTE: Where the person that stores or treats the
				  hazardous secondary material is the generator of the hazardous secondary
				  material, "point of material origination" is being used in a manner similar to
				  the use of the term "point of generation" in air standards established under
				  authority of the federal Clean Air Act in
				  40 CFR
				  60(St and ards 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), each incorporated by reference in 35
				  Ill. Adm. Code 720.111.
Where 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 when 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 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
				  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
				  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 (ppmw) as
				  determined by direct measurement or by knowledge of the material in accordance
				  with the requirements of Section 721.984. 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 x
				  10-6
				  atmospheres/gram-mole/m3) at 25 °C must be
				  included.