When used in Parts 260
through 266 and 268 of this chapter, the following terms have the
meanings given below:
Above ground tank means a device meeting the definition of
"tank'' in §260.10 and that is situated in such a way that
the entire surface area of the tank is completely above the plane
of the adjacent surrounding surface and the entire surface area
of the tank (including the tank bottom) is able to be visually
inspected.
Act or RCRA means the Solid Waste Disposal Act, as amended by the
Resource Conservation and Recovery Act of 1976, as amended, 42
U.S.C. section 6901 et seq.
Active life of a facility means the period from the initial
receipt of hazardous waste at the facility until the Regional
Administrator receives certification of final closure.
Active portion means that portion of a facility where treatment,
storage, or disposal operations are being or have been conducted
after the effective date of Part 261 of this chapter and which is
not a closed portion. (See also "closed portion'' and
"inactive portion''.)
Administrator means the Administrator of the Environmental
Protection Agency, or his designee.
Ancillary equipment means any device including, but not limited
to, such devices as piping, fittings, flanges, valves, and pumps,
that is used to distribute, meter, or control the flow of
hazardous waste from its point of generation to a storage or
treatment tank(s), between hazardous waste storage and treatment
tanks to a point of disposal onsite, or to a point of shipment
for disposal off-site.
Aquifer means a geologic formation, group of formations, or part
of a formation capable of yielding a significant amount of ground
water to wells or springs.
Authorized representative means the person responsible for the
overall operation of a facility or an operational unit (i.e.,
part of a facility), e.g., the plant manager, superintendent or
person of equivalent responsibility.
Boiler means an enclosed device using controlled flame combustion
and having the following characteristics:
(1)(i) The unit must have physical provisions for recovering and
exporting thermal energy in the form of steam, heated fluids, or
heated gases; and
(ii) The unit's combustion chamber and primary energy recovery
sections(s) must be of integral design. To be of integral design,
the combustion chamber and the primary energy recovery section(s)
(such as waterwalls and superheaters) must be physically formed
into one manufactured or assembled unit. A unit in which the
combustion chamber and the primary energy recovery section(s) are
joined only by ducts or connections carrying flue gas is not
integrally designed; however, secondary energy recovery equipment
(such as economizers or air preheaters) need not be physically
formed into the same unit as the combustion chamber and the
primary energy recovery section. The following units are not
precluded from being boilers solely because they are not of
integral design: process heaters (units that transfer energy
directly to a process stream), and fluidized bed combustion
units; and
(iii) While in operation, the unit must maintain a thermal energy
recovery efficiency of at least 60 percent, calculated in terms
of the recovered energy compared with the thermal value of the
fuel; and
(iv) The unit must export and utilize at least 75 percent of the
recovered energy, calculated on an annual basis. In this
calculation, no credit shall be given for recovered heat used
internally in the same unit. (Examples of internal use are the
preheating of fuel or combustion air, and the driving of induced
or forced draft fans or feedwater pumps); or
(2) The unit is one which the Regional Administrator has
determined, on a case-by-case basis, to be a boiler, after
considering the standards in §260.32.
Carbon regeneration unit means any enclosed thermal treatment
device used to regenerate spent activated carbon.
Certification means a statement of professional opinion based
upon and belief.
Closed portion means that portion of a facility which an owner or
operator has closed in accordance with the approved facility
closure plan and all applicable closure requirements. (See also
"active portion'' and "inactive portion''.)
Component means either the tank or ancillary equipment of a tank
system.
Confined aquifer means an aquifer bounded above and below by
impermeable beds or by beds of distinctly lower permeability than
that of the aquifer itself; an aquifer containing confined ground
water.
Container means any portable device in which a material is
stored, transported, treated, disposed of, or otherwise handled.
Contingency plan means a document setting out an organized,
planned, and coordinated course of action to be followed in case
of a fire, explosion, or release of hazardous waste or hazardous
waste constituents which could threaten human health or the
environment.
Corrosion expert means a person who, by reason of his knowledge
of the physical sciences and the principles of engineering and
mathematics, acquired by a professional education and related
practical experience, is qualified to engage in the practice of
corrosion control on buried or submerged metal piping systems and
metal tanks. Such a person must be certified as being qualified
by the National Association of Corrosion Engineers (NACE) or be a
registered professional engineer who has certification or
licensing that includes education and experience in corrosion
control on buried or submerged metal piping systems and metal
tanks.
Designated facility means a hazardous waste treatment, storage,
or disposal facility which (1) has received a permit (or interim
status) in accordance with the requirements of Parts 270 and 124
of this chapter, (2) has received a permit (or interim status)
from a State authorized in accordance with Part 271 of this
chapter, or (3) is regulated under §261.6(c)(2) or subpart F of
Part 266 of this chapter, and (4) that has been designated on the
manifest by the generator pursuant to §260.20. If a waste is
destined to a facility in an authorized State which has not yet
obtained authorization to regulate that particular waste as
hazardous, then the designated facility must be a facility
allowed by the receiving State to accept such waste.
Dike means an embankment or ridge of either natural or man-made
materials used to prevent the movement of liquids, sludges,
solids, or other materials.
Discharge or hazardous waste discharge means the accidental or
intentional spilling, leaking, pumping, pouring, emitting,
emptying, or dumping of hazardous waste into or on any land or
water.
Disposal means the discharge, deposit, injection, dumping,
spilling, leaking, or placing of any solid waste or hazardous
waste into or on any land or water so that such solid waste or
hazardous waste or any constituent thereof may enter the
environment or be emitted into the air or discharged into any
waters, including ground waters.
Disposal facility means a facility or part of a facility at which
hazardous waste is intentionally placed into or on any land or
water, and at which waste will remain after closure.
Drip pad is an engineered structure consisting of a curbed,
free-draining base, constructed of non-earthen materials and
designed to convey preservative kick-back or drippage from
treated wood, precipitation, and surface water run-on to an
associated collection system at wood preserving plants.
Elementary neutralization unit means a device which:
(1) Is used for neutralizing wastes that are hazardous only
because they exhibit the corrosivity characteristic defined in
§261.22 of this chapter, or they are listed in subpart D of Part
261 of the chapter only for this reason; and
(2) Meets the definition of tank, tank system, container,
transport vehicle, or vessel in §260.10 of this chapter.
EPA hazardous waste number means the number assigned by EPA to
each hazardous waste listed in Part 261, subpart D, of this
chapter and to each characteristic identified in Part 261,
subpart C, of this chapter.
EPA identification number means the number assigned by EPA to
each generator, transporter, and treatment, storage, or disposal
facility.
EPA region means the states and territories found in any one of
the following ten regions:
Region I -- Maine, Vermont, New Hampshire, Massachusetts,
Connecticut, and Rhode Island.
Region II -- New York, New Jersey, Commonwealth of Puerto Rico,
and the U.S. Virgin Islands.
Region III -- Pennsylvania, Delaware, Maryland, West Virginia,
Virginia, and the District of Columbia.
Region IV -- Kentucky, Tennessee, North Carolina, Mississippi,
Alabama, Georgia, South Carolina, and Florida.
Region V -- Minnesota, Wisconsin, Illinois, Michigan, Indiana and
Ohio.
Region VI -- New Mexico, Oklahoma, Arkansas, Louisiana, and
Texas.
Region VII -- Nebraska, Kansas, Missouri, and Iowa.
Region VIII -- Montana, Wyoming, North Dakota, South Dakota,
Utah, and Colorado.
Region IX -- California, Nevada, Arizona, Hawaii, Guam, American
Samoa, Commonwealth of the Northern Mariana Islands.
Region X -- Washington, Oregon, Idaho, and Alaska.
Equivalent method means any testing or analytical method approved
by the Administrator under §260.20 and 260.21.
Existing hazardous waste management (HWM) facility or existing
facility means a facility which was in operation or for which
construction commenced on or before November 19, 1980. A facility
has commenced construction if:
(1) The owner or operator has obtained the Federal, State and
local approvals or permits necessary to begin physical
construction; and either
(2)(i) A continuous on-site, physical construction program has
begun; or
(ii) The owner or operator has entered into contractual
obligations -- which cannot be cancelled or modified without
substantial loss -- for physical construction of the facility to
be completed within a reasonable time.
Existing portion means that land surface area of an existing
waste management unit, included in the original Part A permit
application, on which wastes have been placed prior to the
issuance of a permit.
Existing tank system or existing component means a tank system or
component that is used for the storage or treatment of hazardous
waste and that is in operation, or for which installation has
commenced on or prior to July 14, 1986. Installation will be
considered to have commenced if the owner or operator has
obtained all Federal, State, and local approvals or permits
necessary to begin physical construction of the site or
installation of the tank system and if either (1) a continuous
on-site physical construction or installation program has begun,
or (2) the owner or operator has entered into contractual
obligations -- which cannot be canceled or modified without
substantial loss -- for physical construction of the site or
installation of the tank system to be completed within a
reasonable time.
Facility means all contiguous land, and structures, other
appurtenances, and improvements on the land, used for treating,
storing, or disposing of hazardous waste. A facility may consist
of several treatment, storage, or disposal operational units
(e.g., one or more landfills, surface impoundments, or
combinations of them).
Federal agency means any department, agency, or other
instrumentality of the Federal Government, any independent agency
or establishment of the Federal Government including any
Government corporation, and the Government Printing Office.
Federal, State and local approvals or permits necessary to begin
physical construction means permits and approvals required under
Federal, State or local hazardous waste control statutes,
regulations or ordinances.
Final closure means the closure of all hazardous waste management
units at the facility in accordance with all applicable closure
requirements so that hazardous waste management activities under
Parts 264 and 265 of this chapter are no longer conducted at the
facility unless subject to the provisions in §262.34.
Food-chain crops means tobacco, crops grown for human
consumption, and crops grown for feed for animals whose products
are consumed by humans.
Free liquids means liquids which readily separate from the solid
portion of a waste under ambient temperature and pressure.
Freeboard means the vertical distance between the top of a tank
or surface impoundment dike, and the surface of the waste
contained therein.
Generator means any person, by site, whose act or process
produces hazardous waste identified or listed in Part 261 of this
chapter or whose act first causes a hazardous waste to become
subject to regulation.
Ground water means water below the land surface in a zone of
saturation.
Hazardous waste means a hazardous waste as defined in §261.3 of
this chapter.
Hazardous waste constituent means a constituent that caused the
Administrator to list the hazardous waste in Part 261, subpart D,
of this chapter, or a constituent listed in table 1 of §261.24
of this chapter.
Hazardous waste management unit is a contiguous area of land on
or in which hazardous waste is placed, or the largest area in
which there is significant likelihood of mixing hazardous waste
constituents in the same area. Examples of hazardous waste
management units include a surface impoundment, a waste pile, a
land treatment area, a landfill cell, an incinerator, a tank and
its associated piping and underlying containment system and a
container storage area. A container alone does not constitute a
unit; the unit includes containers and the land or pad upon which
they are placed.
In operation refers to a facility which is treating, storing, or
disposing of hazardous waste.
Inactive portion means that portion of a facility which is not
operated after the effective date of Part 261 of this chapter.
(See also "active portion'' and "closed portion''.)
Incinerator means any enclosed device that:
(1) Uses controlled flame combustion and neither meets the
criteria for classification as a boiler, sludge dryer, or carbon
regeneration unit, nor is listed as an industrial furnace; or
(2) Meets the definition of infrared incinerator or plasma arc
incinerator.
Incompatible waste means a hazardous waste which is unsuitable
for:
(1) Placement in a particular device or facility because it may
cause corrosion or decay of containment materials (e.g.,
container inner liners or tank walls); or
(2) Commingling with another waste or material under uncontrolled
conditions because the commingling might produce heat or
pressure, fire or explosion, violent reaction, toxic dusts,
mists, fumes, or gases, or flammable fumes or gases.
(See Part 265, appendix V, of this chapter for examples.)
Individual generation site means the contiguous site at or on
which one or more hazardous wastes are generated. An individual
generation site, such as a large manufacturing plant, may have
one or more sources of hazardous waste but is considered a single
or individual generation site if the site or property is
contiguous.
Industrial furnace means any of the following enclosed devices
that are integral components of manufacturing processes and that
use thermal treatment to accomplish recovery of materials or
energy:
(1) Cement kilns
(2) Lime kilns
(3) Aggregate kilns
(4) Phosphate kilns
(5) Coke ovens
(6) Blast furnaces
(7) Smelting, melting and refining furnaces (including
pyrometallurgical devices such as cupolas, reverberator furnaces,
sintering machine, roasters, and foundry furnaces)
(8) Titanium dioxide chloride process oxidation reactors
(9) Methane reforming furnaces
(10) Pulping liquor recovery furnaces
(11) Combustion devices used in the recovery of sulfur values
from spent sulfuric acid
(12) Halogen acid furnaces (HAFs) for the production of acid from
halogenated hazardous waste generated by chemical production
facilities where the furnace is located on the site of a chemical
production facility, the acid product has a halogen acid content
of at least 3%, the acid product is used in a manufacturing
process, and, except for hazardous waste burned as fuel,
hazardous waste fed to the furnace has a minimum halogen content
of 20% as-generated.
(13) Such other devices as the Administrator may, after notice
and comment, add to this list on the basis of one or more of the
following factors:
(i) The design and use of the device primarily to accomplish
recovery of material products;
(ii) The use of the device to burn or reduce raw materials to
make a material product;
(iii) The use of the device to burn or reduce secondary materials
as effective substitutes for raw materials, in processes using
raw materials as principal feedstocks;
(iv) The use of the device to burn or reduce secondary materials
as ingredients in an industrial process to make a material
product;
(v) The use of the device in common industrial practice to
produce a material product; and
(vi) Other factors, as appropriate.
Infrared incinerator means any enclosed device that uses electric
powered resistance heaters as a source of radiant heat and which
is not listed as an industrial furnace.
Inground tank means a device meeting the definition of
"tank'' in §260.10 whereby a portion of the tank wall is
situated to any degree within the ground, thereby preventing
visual inspection of that external surface area of the tank that
is in the ground.
Injection well means a well into which fluids are injected. (See
also "underground injection''.)
Inner liner means a continuous layer of material placed inside a
tank or container which protects the construction materials of
the tank or container from the contained waste or reagents used
to treat the waste.
Installation inspector means a person who, by reason of his
knowledge of the physical sciences and the principles of
engineering, acquired by a professional education and related
practical experience, is qualified to supervise the installation
of tank systems.
International shipment means the transportation of hazardous
waste into or out of the jurisdiction of the United States.
Landfill means a disposal facility or part of a facility where
hazardous waste is placed in or on land and which is not a pile,
a land treatment facility, a surface impoundment, an underground
injection well, a salt dome formation, a salt bed formation, an
underground mine, or a cave.
Landfill cell means a discrete volume of a hazardous waste
landfill which uses a liner to provide isolation of wastes from
adjacent cells or wastes. Examples of landfill cells are trenches
and pits.
Land treatment facility means a facility or part of a facility at
which hazardous waste is applied onto or incorporated into the
soil surface; such facilities are disposal facilities if the
waste will remain after closure.
Leachate means any liquid, including any suspended components in
the liquid, that has percolated through or drained from hazardous
waste.
Leak-detection system means a system capable of detecting the
failure of either the primary or secondary containment structure
or the presence of a release of hazardous waste or accumulated
liquid in the secondary containment structure. Such a system must
employ operational controls (e.g., daily visual inspections for
releases into the secondary containment system of aboveground
tanks) or consist of an interstitial monitoring device designed
to detect continuously and automatically the failure of the
primary or secondary containment structure or the presence of a
release of hazardous waste into the secondary containment
structure.
Liner means a continuous layer of natural or man-made materials,
beneath or on the sides of a surface impoundment, landfill, or
landfill cell, which restricts the downward or lateral escape of
hazardous waste, hazardous waste constituents, or leachate.
Management or hazardous waste management means the systematic
control of the collection, source separation, storage,
transportation, processing, treatment, recovery, and disposal of
hazardous waste.
Manifest means the shipping document EPA form 8700-22 and, if
necessary, EPA form 8700-22A, originated and signed by the
generator in accordance with the instructions included in the
appendix to Part 262.
Manifest document number means the U.S. EPA twelve digit
identification number assigned to the generator plus a unique
five digit document number assigned to the Manifest by the
generator for recording and reporting purposes.
Mining overburden returned to the mine site means any material
overlying an economic mineral deposit which is removed to gain
access to that deposit and is then used for reclamation of a
surface mine.
Miscellaneous unit means a hazardous waste management unit where
hazardous waste is treated, stored, or disposed of and that is
not a container, tank, surface impoundment, pile, land treatment
unit, landfill, incinerator, boiler, industrial furnace,
underground injection well with appropriate technical standards
under 40 CFR Part 146, or unit eligible for a research,
development, and demonstration permit under §270.65.
Movement means that hazardous waste transported to a facility in
an individual vehicle.
40 CFR §260.10 Definitions. (continued -- N through Z)
New hazardous waste management facility or new facility means a
facility which began operation, or for which construction
commenced after October 21, 1976. (See also "Existing
hazardous waste management facility''.)
New tank system or new tank component means a tank system or
component that will be used for the storage or treatment of
hazardous waste and for which installation has commenced after
July 14, 1986; except, however, for purposes of §264.193(g)(2)
and §265.193(g)(2), a new tank system is one for which
construction commences after July 14, 1986. (See also
"existing tank system.'')
On ground tank means a device meeting the definition of
"tank'' in §260.10 and that is situated in such a way that
the bottom of the tank is on the same level as the adjacent
surrounding surface so that the external tank bottom cannot be
visually inspected.
On-site means the same or geographically contiguous property
which may be divided by public or private right-of-way, provided
the entrance and exit between the properties is at a cross-roads
intersection, and access is by crossing as opposed to going
along, the right-of-way. Non-contiguous properties owned by the
same person but connected by a right-of-way which he controls and
to which the public does not have access, is also considered
on-site property.
Open burning means the combustion of any material without the
following characteristics:
(1) Control of combustion air to maintain adequate temperature
for efficient combustion,
(2) Containment of the combustion-reaction in an enclosed device
to provide sufficient residence time and mixing for complete
combustion, and
(3) Control of emission of the gaseous combustion products.
(See also "incineration'' and "thermal treatment''.)
Operator means the person responsible for the overall operation
of a facility.
Owner means the person who owns a facility or part of a facility.
Partial closure means the closure of a hazardous waste management
unit in accordance with the applicable closure requirements of
Parts 264 and 265 of this chapter at a facility that contains
other active hazardous waste management units. For example,
partial closure may include the closure of a tank (including its
associated piping and underlying containment systems), landfill
cell, surface impoundment, waste pile, or other hazardous waste
management unit, while other units of the same facility continue
to operate.
Person means an individual, trust, firm, joint stock company,
Federal Agency, corporation (including a government corporation),
partnership, association, State, municipality, commission,
political subdivision of a State, or any interstate body.
Personnel or facility personnel means all persons who work, at,
or oversee the operations of, a hazardous waste facility, and
whose actions or failure to act may result in noncompliance with
the requirements of Part 264 or 265 of this chapter.
Pile means any non-containerized accumulation of solid,
nonflowing hazardous waste that is used for treatment or storage.
Plasma arc incinerator means any enclosed device using a high
intensity electrical discharge or arc as a source of heat and
which is not listed as an industrial furnace.
Point source means any discernible, confined, and discrete
conveyance, including, but not limited to any pipe, ditch,
channel, tunnel, conduit, well, discrete fissure, container,
rolling stock, concentrated animal feeding operation, or vessel
or other floating craft, from which pollutants are or may be
discharged. This term does not include return flows from
irrigated agriculture.
Publicly owned treatment works or POTW means any device or system
used in the treatment (including recycling and reclamation) of
municipal sewage or industrial wastes of a liquid nature which is
owned by a "State'' or "municipality'' (as defined by
section 502(4) of the CWA). This definition includes sewers,
pipes, or other conveyances only if they convey wastewater to a
POTW providing treatment.
Qualified Ground-Water Scientist means a scientist or engineer
who has received a baccalaureate or post-graduate degree in the
natural sciences or engineering, and has sufficient training and
experience in ground-water hydrology and related fields as may be
demonstrated by state registration, professional certifications,
or completion of accredited university courses that enable that
individual to make sound professional judgements regarding
ground-water monitoring and contaminant fate and transport.
Regional Administrator means the Regional Administrator for the
EPA Region in which the facility is located, or his designee.
Replacement unit means a landfill, surface impoundment, or waste
pile unit (1) from which all or substantially all of the waste is
removed, and (2) that is subsequently reused to treat, store, or
dispose of hazardous waste. "Replacement unit'' does not
apply to a unit from which waste is removed during closure, if
the subsequent reuse solely involves the disposal of waste from
that unit and other closing units or corrective action areas at
the facility, in accordance with an approved closure plan or EPA
or State approved corrective action.
Representative sample means a sample of a universe or whole
(e.g., waste pile, lagoon, ground water) which can be expected to
exhibit the average properties of the universe or whole.
Run-off means any rainwater, leachate, or other liquid that
drains over land from any part of a facility.
Run-on means any rainwater, leachate, or other liquid that drains
over land onto any part of a facility.
Saturated zone or zone of saturation means that part of the
earth's crust in which all voids are filled with water.
Sludge means any solid, semi-solid, or liquid waste generated
from a municipal, commercial, or industrial wastewater treatment
plant, water supply treatment plant, or air pollution control
facility exclusive of the treated effluent from a wastewater
treatment plant.
Sludge dryer means any enclosed thermal treatment device that is
used to dehydrate sludge and that has a maximum total thermal
input, excluding the heating value of the sludge itself, of 2,500
Btu/lb. of sludge treated on a wet-weight basis.
Small Quantity Generator means a generator who generates less
than 1000 kg of hazardous waste in a calendar month.
Solid waste means a solid waste as defined in §261.2 of this
chapter.
State means any of the several States, the District of Columbia,
the Commonwealth of Puerto Rico, the Virgin Islands, Guam,
American Samoa, and the Commonwealth of the Northern Mariana
Islands.
Storage means the holding of hazardous waste for a temporary
period, at the end of which the hazardous waste is treated,
disposed of, or stored elsewhere.
Sump means any pit or reservoir that meets the definition of tank
and those troughs/trenches connected to it that serve to collect
hazardous waste for transport to hazardous waste storage,
treatment, or disposal facilities; except that as used in the
landfill, surface impoundment, and waste pile rules, "sump''
means any lined pit or reservoir that serves to collect liquids
drained from a leachate collection and removal system or leak
detection system for subsequent removal from the system.
Surface impoundment or impoundment means a facility or part of a
facility which is a natural topographic depression, man-made
excavation, or diked area formed primarily of earthen materials
(although it may be lined with man-made materials), which is
designed to hold an accumulation of liquid wastes or wastes
containing free liquids, and which is not an injection well.
Examples of surface impoundments are holding, storage, settling,
and aeration pits, ponds, and lagoons.
Tank means a stationary device, designed to contain an
accumulation of hazardous waste which is constructed primarily of
non-earthen materials (e.g., wood, concrete, steel, plastic)
which provide structural support.
Tank system means a hazardous waste storage or treatment tank and
its associated ancillary equipment and containment system.
Thermal treatment means the treatment of hazardous waste in a
device which uses elevated temperatures as the primary means to
change the chemical, physical, or biological character or
composition of the hazardous waste. Examples of thermal treatment
processes are incineration, molten salt, pyrolysis, calcination,
wet air oxidation, and microwave discharge. (See also
"incinerator'' and "open burning''.)
Totally enclosed treatment facility means a facility for the
treatment of hazardous waste which is directly connected to an
industrial production process and which is constructed and
operated in a manner which prevents the release of any hazardous
waste or any constituent thereof into the environment during
treatment. An example is a pipe in which waste acid is
neutralized.
Transfer facility means any transportation related facility
including loading docks, parking areas, storage areas and other
similar areas where shipments of hazardous waste are held during
the normal course of transportation.
Transport vehicle means a motor vehicle or rail car used for the
transportation of cargo by any mode. Each cargo-carrying body
(trailer, railroad freight car, etc.) is a separate transport
vehicle.
Transportation means the movement of hazardous waste by air,
rail, highway, or water.
Transporter means a person engaged in the offsite transportation
of hazardous waste by air, rail, highway, or water.
Treatability Study means a study in which a hazardous waste is
subjected to a treatment process to determine: (1) Whether the
waste is amenable to the treatment process, (2) what pretreatment
(if any) is required, (3) the optimal process conditions needed
to achieve the desired treatment, (4) the efficiency of a
treatment process for a specific waste or wastes, or (5) the
characteristics and volumes of residuals from a particular
treatment process. Also included in this definition for the
purpose of the 261.4 (e) and (f) exemptions are liner
compatibility, corrosion, and other material compatibility
studies and toxicological and health effects studies. A
"treatability study'' is not a means to commercially treat
or dispose of hazardous waste.
Treatment means any method, technique, or process, including
neutralization, designed to change the physical, chemical, or
biological character or composition of any hazardous waste so as
to neutralize such waste, or so as to recover energy or material
resources from the waste, or so as to render such waste
non-hazardous, or less hazardous; safer to transport, store, or
dispose of; or amenable for recovery, amenable for storage, or
reduced in volume.
Treatment zone means a soil area of the unsaturated zone of a
land treatment unit within which hazardous constituents are
degraded, transformed, or immobilized.
Underground injection means the subsurface emplacement of fluids
through a bored, drilled or driven well; or through a dug well,
where the depth of the dug well is greater than the largest
surface dimension. (See also "injection well''.)
Underground tank means a device meeting the definition of
"tank'' in §260.10 whose entire surface area is totally
below the surface of and covered by the ground.
Unfit-for use tank system means a tank system that has been
determined through an integrity assessment or other inspection to
be no longer capable of storing or treating hazardous waste
without posing a threat of release of hazardous waste to the
environment.
Unsaturated zone or zone of aeration means the zone between the
land surface and the water table.
United States means the 50 States, the District of Columbia, the
Commonwealth of Puerto Rico, the U.S. Virgin Islands, Guam,
American Samoa, and the Commonwealth of the Northern Mariana
Islands.
Uppermost aquifer means the geologic formation nearest the
natural ground surface that is an aquifer, as well as lower
aquifers that are hydraulically interconnected with this aquifer
within the facility's property boundary.
Vessel includes every description of watercraft, used or capable
of being used as a means of transportation on the water.
Wastewater treatment unit means a device which:
(1) Is part of a wastewater treatment facility that is subject to
regulation under either section 402 or 307(b) of the Clean Water
Act; and
(2) Receives and treats or stores an influent wastewater that is
a hazardous waste as defined in 261.3 of this chapter, or that
generates and accumulates a wastewater treatment sludge that is a
hazardous waste as defined in §261.3 of this chapter, or treats
or stores a wastewater treatment sludge which is a hazardous
waste as defined in §261.3 of this Chapter; and
(3) Meets the definition of tank or tank system in §260.10 of
this chapter.
Water (bulk shipment) means the bulk transportation of hazardous
waste which is loaded or carried on board a vessel without
containers or labels.
Well means any shaft or pit dug or bored into the earth,
generally of a cylindrical form, and often walled with bricks or
tubing to prevent the earth from caving in.
Well injection: (See "underground injection''.)
Zone of engineering control means an area under the control of
the that, upon detection of a hazardous waste release, can be
readily cleaned up prior to the release of hazardous waste or
hazardous constituents to ground water or surface water.
(45 FR 33073, May 19, 1980)
Editorial Note: For Federal Register citations affecting
§260.10, see the List of CFR Sections Affected in the Finding
Aids section of this volume.
Effective Date Note: At 57 FR 3485, Jan. 29, 1992, §260.10 was
amended by adding the definition of "Replacement unit'' and
revising the definition of "sump'' effective July 29, 1992.
For the convenience of the user, the superseded text appears as
follows:
§260.10 Definitions.
When used in Parts 260 through 265 and 268 of this chapter, the
following terms have the meanings given below:
* * * * *
Sump means any pit or reservoir that meets the definition of tank
and those troughs/trenches connected to it that serves to collect
hazardous waste for transport to hazardous waste storage,
treatment, or disposal facilities.