North Dakota Administrative Code › Title 33.1 - Department of Environmental Quality › Article 33.1-24 - Hazardous Waste Management › Chapter 33.1-24-05 - Standards for Treatment, Storage, and Disposal Facilities and for the Management of Specific Hazardous Wastes and Specific Types of Hazardous Waste Management Facilities › AIR EMISSION STANDARDS FOR TANKS, SURFACE IMPOUNDMENTS, AND CONTAINERS › Section 33.1-24-05-451 - Definitions

Current through Supplement No. 393, July, 2024
As used in sections
					 33.1-24-05-450 through
					 33.1-24-05-474, all terms shall
					 have the meaning given to them as defined below or as defined elsewhere in this
					 article.
1. "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
				  33.1-24-05-454.
2. "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 (for example, a sampling port cap),
				  manually operated (for example, a hinged access lid or hatch), or automatically
				  operated (for example, a spring-loaded pressure relief valve).
3. "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.
4. "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.
5. "Enclosure" means any 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.
6. "External
				  floating roof" means a pontoon or double-deck type cover that rests on the
				  surface of a material managed in a tank with no fixed roof.
7. "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.
8. "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.
9. "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.
10. "Hard-piping" means pipe or tubing that
				  is manufactured and properly installed in accordance with relevant standards
				  and good engineering practices.
11.
				  "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 at 20 degrees Celsius; and the total concentration of the pure
				  organic constituents having a vapor pressure greater than 0.3 kilopascals at 20
				  degrees Celsius is equal to or greater than twenty percent by weight.
12. "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.
13. "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.
14. "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.
15.
				  "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 (for example, temperature,
				  agitation, pH effects of combining wastes, etc.) reasonably expected to occur
				  in the tank. For the purpose of sections
				  33.1-24-05-450 through
				  33.1-24-05-474, maximum organic
				  vapor pressure is determined using the procedures specified in subsection 3 of
				  section 33.1-24-05-453.
16. "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.
17. "No detectable
				  organic emissions" means no escape of organics to the atmosphere as determined
				  using the procedure specified in subsection 4 of section
				  33.1-24-05-453.
18. "Point of waste origination" means as
				  follows:
a. 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
				  33.1-24-02.
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.
b. 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.