Special definitions. The following definitions shall apply in interpretation
and application of source water protection provisions:
ABANDONMENT OF WELL
An abandoned or unused well may be defined as one of the
following:
(1)
A well, other than a monitoring well, which has been out of
service continuously for one year or more, and does not meet the definition
of a standby well.
(2)
A monitoring well from which no measurement or sample has been
taken for a period of three years.
(3)
A well which is in such a state of disrepair that it cannot
be made operational for its intended purpose.
(4)
A test hole or exploratory boring 24 hours after construction
and testing work has been completed.
(5)
A cathodic protection well that is no longer functional for
its original purpose.
(6)
An inactive geothermal groundwater heat exchange system.
ALTERATION OF SURFACE FEATURES
Any earth moving, clear-cutting, filling, mining, dredging,
grading, paving, excavating or drilling activities which require a
permit or approval from federal, state or local officials.
BEST MANAGEMENT PRACTICE (BMP)
Activities, facilities, measures or procedures used to manage
stormwater impacts from land development, to protect and maintain
water quality and groundwater recharge and to otherwise meet the purposes
of this chapter, including, but not limited to, infiltration, filter
strips, low-impact design, bioretention, wet ponds, permeable paving,
grassed swales, forested buffers, sand filters and detention basins.
CLOSED DEPRESSION
A distinctive bowl-shaped depression of varied sizes in the
land surface, characterized by internal drainage and an unbroken ground
surface.
COMMUNITY OR PACKAGE SEWER SYSTEM
A private sewage disposal system releasing treated effluent
either into the ground or a surface water source. A large-scale system
is intended to serve over 25 equivalent dwelling units (EDUs); a small
system is intended to serve between 2 and 24 EDUs.
DETENTION POND
A basin designed to retard stormwater runoff by temporarily
storing the runoff and releasing it at a predetermined rate through
a defined outlet.
FRACTURE TRACE
Natural, linear-drainage, soil-tonal and topographic alignments,
usually visible on aerial photographs, which are commonly the surface
manifestations of corresponding zones of fracture concentration within
underlying bedrock. Particularly in soluble rocks, (e.g., limestone)
fracture zones cause increased bedrock porosity and permeability,
resulting in rates of groundwater movement that are greater than the
surrounding bedrock.
GHOST LAKES
Transient surface water bodies formed in sinks and closed
depressions after heavy precipitation, due to poor internal drainage.
This poor drainage may be due to residual clay remaining after solution
of limestone minerals.
KARST
A type of topography characterized by closed depressions
and/or sinkholes, caves, rock pinnacles, fracture traces and underground
drainage resulting from solution of limestone and dolomite bedrock.
REGULATED SUBSTANCE
A product, by-product or combination of substances that,
because of physical, chemical or infectious characteristics and the
quantity or concentration of such substances, if not properly treated,
stored, transported, used or disposed of or otherwise managed, would
create a substantial present or potential threat to the public health
through direct or indirect introduction into groundwater resources
and the subsurface environment. Such hazardous substances include,
but are not limited to, substances regulated under federal or state
environmental, pollution control, hazardous substances and drinking
water laws and regulations.
RETENTION POND
A basin designed to retard stormwater runoff by temporarily
storing the runoff, which does not have a defined outlet structure,
but which empties through a combination of evaporation, transpiration
and infiltration.
SINKHOLE
A closed, generally circular depression in the land surface
of variable depth and width, characterized by a distinct breaking
of the ground surface and formed by solution of carbonate bedrock
and downward movement of soil into bedrock voids, or collapse of underlying
caves.
STORAGE TANK, ABOVEGROUND
A tank which contains hazardous or petroleum substances as
regulated under the Storage Tank and Spill Prevention Act (STSPA),
as amended, and which meets the following criteria: a stationary tank
with 250 gallons or more of capacity with greater than 90% of its
capacity above ground. Specific exceptions to this definition are
included within the STSPA, and include, among others, on-premises
heating fuel tanks, and farm or residential motor fuel tanks with
a capacity of 1,100 gallons or less.
STORAGE TANK, EXEMPTED
Any tank or container which contains hazardous or petroleum
substances, either above or underground, which is otherwise unregulated
by the STSPA to include, exclusively, the following: on-premises heating
fuel tanks; farm or residential motor fuel tanks with a capacity of
1,100 gallons or less, and tanks, drums or containers with a capacity
of less than 110 gallons which contain hazardous substances.
STORAGE TANK, UNDERGROUND
A tank which contains hazardous or petroleum substances as
regulated under the STSPA and which meets the following criteria: a tank with 110
gallons or more of capacity with 10% or greater of its capacity beneath
the ground surface. Specific exceptions to this definition are included
within the STSPA and include, among others, on-premises heating fuel
tanks and farm or residential motor fuel tanks with a capacity of
1,100 gallons or less.
UNDERGROUND INJECTION WELL
A bored, drilled, driven or dug well for the emplacement
of fluids into the ground (except geothermal exchange systems and
drilling muds and similar materials used in well construction.)