Washington Administrative Code › Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508) › Chapter 173-360A - Underground storage tank regulations › Part 1 - PURPOSE AND SCOPE › Section 173-360A-0150 - Definitions

Current through Register Vol. 24-14, July 15, 2024
For the purposes of this chapter, the following definitions
				  apply unless the context clearly requires otherwise.
(1)
"Airport hydrant fuel distribution
				system"
or
"airport hydrant system"
means an UST system
				which fuels aircraft and operates under high pressure with large diameter
				piping that typically terminates into one or more hydrants (fill stands). The
				airport hydrant system begins where fuel enters one or more tanks from an
				external source such as a pipeline, barge, railcar, or other motor fuel
				carrier.
(2)
"Ancillary
				equipment"
means any devices including spill prevention equipment,
				overfill prevention equipment, corrosion protection equipment, release
				detection equipment, containment sumps, and such devices as piping, fittings,
				flanges, valves, and pumps used to distribute, meter, or control the flow of
				regulated substances to and from an UST.
(3)
"Cathodic protection"
means
				a technique to prevent corrosion of a metal surface by making that surface the
				cathode of an electrochemical cell. For example, an UST system can be
				cathodically protected through the application of either galvanic anodes or
				impressed current.
(4)
"Cathodic protection tester"
means an individual who can
				demonstrate an understanding of the principles and measurements of all common
				types of cathodic protection systems as applied to buried or submerged metal
				piping and tank systems. At a minimum, such individuals must have sufficient
				education in and experience with soil resistivity, stray current,
				structure-to-soil potential, component electrical isolation measurements of
				buried metal piping and tank systems. Such individuals must be certified in
				accordance with WAC 173-360A-0930(6).
(5)
"Change-in-service"
means to
				change the substances stored in an UST system from regulated substances to
				unregulated substances.
(6)
"Class A operator"
means an individual designated by an UST system
				owner or operator as having primary responsibility for the operation and
				maintenance of the system. The Class A operator typically manages resources and
				personnel, such as establishing work assignments, to achieve and maintain
				compliance with regulatory requirements.
(7)
"Class B operator"
means an
				individual designated by an UST system owner or operator as having control of
				or responsibility for the day-to-day operation and maintenance of the system.
				The Class B operator typically performs or ensures the performance of operation
				and maintenance activities at a UST facility, maintains records of those
				activities, and reports those activities to the department.
(8)
"Class C operator"
means an
				individual responsible for initially responding to alarms or other indications
				of emergencies caused by spills, overfills, leaks, or releases from an UST
				system. The Class C operator typically controls or monitors the dispensing or
				sale of regulated substances from the system.
(9)
"Code of practice"
means the
				most recent edition of a code of practice developed by a nationally or
				internationally recognized association or independent testing laboratory
				available at the time an UST system service is performed.
(10)
"Compatible"
means the
				ability of two or more substances or materials to maintain their respective
				physical and chemical properties upon contact with one another for the design
				life of the UST system under conditions likely to be encountered in the UST
				system.
(11)
"Connected
				piping"
means all underground piping including valves, elbows, joints,
				flanges, and flexible connectors attached to an UST system through which
				regulated substances flow. For the purpose of determining how much piping is
				connected to any individual UST system, the piping that joins two UST systems
				should be allocated equally between them.
(12)
"Containment sump"
means a
				liquid-tight container that protects the environment by containing leaks and
				spills of regulated substances from piping, dispensers, pumps, and related
				components in the containment area. Containment sumps may be single walled or
				secondarily contained and located at the top of tank (tank top or submersible
				turbine pump sump), underneath the dispenser (under-dispenser containment
				sump), or at other points in the piping run (transition or intermediate
				sump).
(13)
"Corrosion
				expert"
means an individual who, by reason of a thorough 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 individuals must be certified in
				accordance with WAC 173-360A-0930(5).
(14)
"Decommission"
means to
				permanently take a tank or pipe out of operation.
(15)
"Department"
means the
				department of ecology.
(16)
"Dielectric material"
means a material that does not conduct
				direct electrical current. Dielectric coatings are used to electrically isolate
				UST systems from the surrounding soils. Dielectric bushings are used to
				electrically isolate portions of the UST system (e.g., tank from
				piping).
(17)
"Dispenser"
means a device used to dispense regulated substances
				from an UST system.
(18)
"Dispenser system"
means a dispenser and the aboveground equipment
				necessary to connect the dispenser to an UST system, including check valves,
				shear valves, unburied risers, flexible connectors, and other transitional
				components.
(19)
"Double-walled tanks"
and
"double-walled piping"
mean
				tanks and piping consisting of an inner wall and an outer wall with an
				interstitial space capable of being monitored for leaks.
(20)
"Electrical equipment"
means, for the purposes of the exemption described in WAC 173-360A-0110(1)(i),
				underground equipment that contains dielectric fluid that is necessary for the
				operation of equipment such as transformers and buried electrical
				cable.
(21)
"Environment"
means the term as defined in WAC
				173-340-200.
(22)
"Excavation zone"
means the
				volume containing the UST system and back fill material bounded by the ground
				surface, walls, and floor of the pit and trenches into which the UST system is
				placed at the time of installation.
(23)
"Existing UST system"
means
				an UST system used to contain an accumulation of regulated substances or for
				which installation had commenced on or before December 22, 1988. Installation
				is considered to have commenced if:
(a) The
				owner or operator had obtained all federal, state, and local approvals or
				permits necessary to begin physical construction at the UST facility or
				installation of the UST system; and
(b) Either a continuous on-site physical
				construction or installation program had begun or the owner or operator had
				entered into contractual obligations-which cannot be canceled or modified
				without substantial loss-for physical construction at the UST facility or
				installation of the UST system to be completed within a reasonable
				time.