Definitions. This section defines words, terms, and phrases found
in this article.
ABOVEGROUND STORAGE TANK (AST)
An AST is a single containment vessel greater than 250 gallons
as defined in the Delaware Regulations Governing Aboveground Storage
Tanks, dated February 11, 2005, or as later revised. ASTs with a storage
capacity greater than 12,499 gallons containing petroleum or hazardous
substances and ASTs with a storage capacity greater than 39,999 gallons
containing diesel, heating fuel or kerosene are subject to the design,
construction, operation, and maintenance requirements of the Delaware
AST regulations.
APPLICANT
A person, firm, or government agency that executes the necessary
forms to obtain approval or a permit for any zoning, subdivision,
land development, building, land disturbance, or other activity regulated.
AQUIFER
A geological formation, group of formations or part of a
formation composed of rock, sand, or gravel capable of storing and
yielding groundwater to wells.
CERCLA HAZARDOUS SUBSTANCES
Are defined in terms of either those substances specifically
designated as hazardous under the Comprehensive Environmental Response,
Compensation, and Liability Act (CERCLA), otherwise known as the "Superfund
Law", or those substances identified under other laws. In all, the
Superfund Law includes references to four other laws to designate
more than 800 substances as hazardous and identifies many more as
potentially hazardous due to their characteristics and the circumstances
of their release.
CONTAMINATION
Any physical, chemical, biological, or radiological substance
that enters the hydrological cycle through human action and may cause
a deleterious effect on groundwater resources; it shall include but
is not limited to hazardous waste, limiting nutrients, and sanitary
sewage.
DELINEATION
The process of defining and/or mapping a boundary that approximates
the areas that contribute water to a particular water source used
as a public water supply.
ENVIRONMENTAL IMPACT ASSESSMENT REPORT
A report that documents how new development that will exceed twenty-percent impervious cover within excellent groundwater recharge potential areas and Wellhead Protection Zone 2 will augment recharge and assure water quality and quantity. See Subsection
H.
EXCELLENT GROUND-WATER RECHARGE POTENTIAL AREA
Those areas with high percentages of sand and gravel that
have "excellent" potential for recharge as determined through a Stack
Unit Mapping Analysis delineated by the Delaware Geological Survey
and presented in the Report of Investigations No. 66, Ground-Water
Recharge Potential Mapping in Kent and Sussex Counties, Delaware,
Geological Survey, 2004.
GEOLOGIST
An individual who is registered in the State of Delaware
to practice the profession of geology.
GROUND WATER
The water contained in interconnected pores located below
the water table in an unconfined aquifer or located in a confined
aquifer.
HAZARDOUS SUBSTANCE UST SYSTEM
An underground storage tank system that contains a hazardous
substance defined in Section 101(14) of CERCLA (but not including any substance regulated as
a hazardous waste under RCRA Subtitle C) or any mixture of such substances and petroleum and which
is not a petroleum UST system.
HAZARDOUS WASTE
A solid waste, or combination of solid wastes, which because
of its quantity, concentration, or physical, chemical, or infectious
characteristics may cause or significantly contribute to an increase
in mortality or an increase in serious irreversible or incapacitating
irreversible illness or pose a substantial present or potential hazard
to human health or the environment when improperly treated, stored,
transported, or disposed of or otherwise managed. Without limitation,
included within this definition are those hazardous wastes described
in Sections 261.31, 261.32, and 261.33 of the Delaware Regulations
Governing Hazardous Waste, or as later revised.
IMPERVIOUS COVER
Surfaces providing negligible infiltration, such as pavement,
buildings, recreation facilities (e.g., tennis courts, swimming pools,
etc.), and covered driveways.
INFILL
The rededication of land in a built environment, usually
open space, to new construction. The parcel has access to public infrastructure
such as utilities and wastewater treatment.
NATURAL CONDITION
Open space that is essentially unimproved and set aside,
dedicated, designated, or reserved for public or private use.
NONCONFORMING USE
An existing use of a lot or a building that was legal at
the time of its creation that is not permitted by this chapter in
the district in which it is located.
ON-SITE WASTEWATER TREATMENT AND DISPOSAL SYSTEM
Conventional or alternative, wastewater treatment and disposal
systems installed or proposed to be installed on land of the owner
or on other land to which the owner has the legal right to install
the system.
PASSIVE RECREATION
Refers to recreation that involves existing natural resources
and has a minimal impact because it does not require the alteration
of existing topography. Such passive recreation shall include but
not be limited to nonmotorized vehicles, hiking, bicycling, picnicking,
and bird-watching.
PREVIOUSLY DEVELOPED
Areas within the Town of Bridgeville that already are platted,
built out and served with public infrastructure, including water,
sewer and roads, including any brownfield sites or vacant lots that
would provide infill opportunities for development.
PUBLIC DRINKING WATER SYSTEM
A community, noncommunity, or nontransient noncommunity water
system, which provides piped water to the public for human consumption.
The system must have at least 15 service connections or regularly
serve at least 25 individuals daily for at least 60 days.
PUBLIC WATER SUPPLY WELL
Any well from which the water is used to serve a community
water system by Section 22.146 (Public Water Systems) in the Delaware
State Regulations Governing Public Drinking Water Systems, or as later
revised.
REDEVELOPMENT
Any proposed expansion, addition, or major facade change
to an existing building, structure, or parking facility.
RUNOFF
That portion of precipitation or snowmelt that has not evaporated
or infiltrated into the soil but flows on land or impervious surfaces.
SANITARY LANDFILL
A land site at which solid waste is deposited on or into
the land as fill for the purpose of permanent disposal, except that
it will not include any facility that has been approved for the disposal
of hazardous waste under the Delaware Regulations Governing Hazardous
Waste.
SITE PLAN APPROVAL
A process for the review and approval of a development plan
prior to the issuance of a development.
SOURCE WATER
Refers to any aquifer from which water is drawn either periodically
or continuously by a public water system.
SOURCE WATER ASSESSMENT AREA
The area delineated by DNREC Source Water Assessment and
Protection Program that contributes water to a public water supply
system.
SOURCE WATER ASSESSMENT PLAN
The October 1999 U.S. EPA-approved plan for evaluating the
sources of public drinking water in Delaware for their vulnerability
and susceptibility to contamination.
SOURCE WATER ASSESSMENT REPORT (SWAP)
The identification and evaluation of the sources of water
within the state used by public water systems in an effort to determine
the vulnerability and susceptibility to contamination.
STORMWATER
The runoff of water from the surface of the land resulting
from precipitation or snow- or icemelts.
STORMWATER MANAGEMENT
(1)
For water quantity control, a system of vegetative, structural,
and other measures that may control the volume and rate of stormwater
runoff which may be caused by land-disturbing activities or activities
upon the land; and
(2)
For water quality control, a system of vegetative, structural,
and other measures that control adverse effects on water quality that
may be caused by land-disturbing activities or activities upon the
land.
UNDERGROUND STORAGE TANK (UST)
An UST is one or a combination of tanks, including underground
pipes, the volume of which is 10% or more below the ground, as defined
in the Delaware Regulations Governing Underground Storage Tank Systems,
dated June 1, 2010, or as later revised. The following USTs are not
subject to the design, construction, operation, and maintenance requirements
of the Delaware UST Regulations: residential heating fuel, agricultural,
and residential motor fuel USTs less than 1,100 gallons and any UST
less than 110 gallons.
VACANT PROPERTY
Lands or buildings that are not actively used for any purpose
as designated in the underlying zoning district/overlay for one year.
WASTEWATER
Water-carried waste from septic tanks, water closets, residences,
building, industrial establishments, or other places, together with
such groundwater infiltration, subsurface water, and mixtures of industrial
wastes or other wastes as may be present.
WATER QUALITY
Those characteristics of stormwater runoff from an impervious
surface or a land-disturbing activity that relate to the chemical,
physical, biological, or radiological integrity of water.
WATER QUANTITY
(1)
Those characteristics of stormwater runoff that relate to the
volume of stormwater runoff to downstream-gradient areas resulting
from land-disturbing activities.
(2)
Those characteristics of stormwater that relate to the volume
of stormwater that infiltrates the land surface and enters the underlying
aquifer.
WELLHEAD
The upper terminal of a well, including adapters, ports,
seals, valves, and other attachments.
WELLHEAD PROTECTION AREA (WHPA)
Surface and subsurface areas surrounding public water supply
wells or well fields where the quantity or quality of groundwater
moving toward the wells or well fields may be adversely affected by
land use activity.
WELLHEAD PROTECTION PLAN
The March 1990 U.S. EPA-approved plan for protecting the
quality of drinking water derived from public water supply wells in
Delaware.