Definitions.
ABANDONED WELL
Shall mean any well which is not in use, has been illegally installed or improperly constructed, has been improperly maintained or is damaged, has not been maintained in a condition that ensures that the subsurface or percolation water of the State are protected from contamination, has been replaced by another well or connection to a public supply, is contaminated, is nonproductive, or no longer serves its intended use pursuant to the State Act.
ABANDONMENT OR DECOMMISSIONING OF A WELL
Shall mean the permanent closure or sealing of a well in accordance with N.J.A.C. 7:9D-3 et seq.
ALTER
Shall mean to enlarge, deepen or replace any portion of an existing water supply system. The terms "alteration" and "altered" shall be construed accordingly.
APPLICANT
Shall mean a developer or property owner submitting an application for development or permit to install or use a well.
APPLICATION FOR DEVELOPMENT
Shall mean the application form and all accompanying documents required by ordinance for approval of a subdivision plat, site plan, planned development, conditional use, zoning variance, or direction of the issuance of a permit pursuant to N.J.S.A. 40:55D-34 or N.J.S.A. 40:55D-36.
APPLICATION FOR WELL PERMIT
Shall mean the application form and all accompanying documentation required by the township for approval to locate, construct or alter a water supply in accordance with subsection 16-6.5 of Chapter 16 and as authorized by N.J.A.C. 7:10-12.40.
AQUICLUDE
Shall mean a low-permeability unit that forms either the upper or lower boundary of a groundwater flow system.
AQUIFER
Shall mean rock or sediment in a formation, group of formations, or part of a formation which is saturated and sufficiently permeable to transmit economic quantities of water to wells and springs.
AQUIFER TEST
Shall mean a three-part test conducted to obtain background, pumping, and recovery data from a pumping well and observation wells in order to determine aquifer characteristics and assess potential well interference.
AQUIFER, CONFINED
Shall mean an aquifer that is overlain by a confining bed. The confining bed has a significantly lower hydraulic conductivity than the aquifer.
AQUIFER, PERCHED
Shall mean a region in the unsaturated zone where the soil may be locally saturated because it overlies a low-permeability unit.
AQUIFER, SEMI-CONFINED
Shall mean an aquifer confined by a low-permeability layer that permits water to slowly migrate through to the aquifer. Also termed leaky artesian or leaky confined aquifer.
AQUIFER, UNCONFINED
Shall mean an aquifer in which there are no confining beds between the zone of saturation and the ground surface. Water-table aquifer is a synonym.
AQUITARD
Shall mean a low-permeability unit that can store groundwater and also transmit water slowly from one aquifer to another.
BARRIER BOUNDARY
Shall mean an aquifer-system boundary represented by a rock mass that is not a source of water.
BUILDING LOT
Shall mean a designated parcel, tract or area of land established by plat or otherwise permitted by law, to be used, developed or built upon as a unit and for which the water supply is obtained from a private on-site well.
COMMUNITY WATER SUPPLY SYSTEM
Shall mean a source and distribution system for potable water subject to the requirements of N.J.S.A. 58:12A-1.1 et seq. and N.J.A.C. 7:10-1.1 et seq.
CONE OF DEPRESSION
Shall mean the area around a pumping well in which the head in the aquifer has been lowered.
CONFINING BED
Shall mean a body of material of low hydraulic conductivity that is stratigraphically adjacent to one or more aquifers.
DEVELOPER
Shall mean the legal or beneficial owner or owners of a lot or of any land proposed to be included in a proposed development including the holder of an option or contract to purchase, or other person having an enforceable proprietary interest in such land.
DRAWDOWN
Shall mean the lowering of the water table of an unconfined aquifer or the potentiometric surface of a confined aquifer caused by pumping of groundwater from wells. Drawdown is determined by subtracting the depth to water from the static water level determined prior to the start of pumping.
FRACTURE TRACE
Shall mean the surface representation of a fracture zone.
GROUNDWATER
Shall mean water in the saturated zone that is under a pressure equal to or greater than atmospheric pressure.
GROUNDWATER MINING
Shall mean the practice of withdrawing groundwater at rates in excess of natural recharge.
HEAD
Shall mean the height above a datum plane of a column of water. In a groundwater system, it is composed of elevation head and pressure head.
HYDRAULIC CONDUCTIVITY
Shall mean the capacity of a rock to transmit water. It is expressed as the volume of water at the prevailing density and viscosity that will move in unit time under a unit hydraulic gradient through a unit area measured at right angle to the direction of flow.
HYDRAULIC GRADIENT
Shall mean change in head per unit of distance measured in the direction of the steepest change.
HYDROGEOLOGY
Shall mean the study of the interrelationships of geologic materials and process with water, especially groundwater.
INFILTRATION
Shall mean the flow of water downward from the land surface into and through the upper soil layers.
INTERFLOW
Shall mean the lateral movement of water in the unsaturated zone during and immediately after a precipitation event. Water moving as interflow discharges directly into a surface-water body.
IRRIGATION SYSTEM
Shall mean equipment including but not limited to pumps, piping, and sprinkler heads used to distribute water to grasses, landscape materials, and other vegetation.
LOCAL AGENCY
Shall mean the board of health, which is the municipal agency responsible for review and approval of an application for well operation.
LOCAL ENFORCEMENT OFFICER
Shall mean the township health officer or other technical representative of the township as may be designated by the Hopewell Township Board of Health.
NJDEP
Shall mean the New Jersey Department of Environmental Protection.
OBSERVATION WELL
Shall mean a nonpumping well used to observe the elevation of the water table or the potentiometric surface. An observation well is generally constructed similar to a pumping well. Also known as monitoring well.
POROSITY
Shall mean the voids or openings in a rock. Porosity may be expressed quantitatively as the ratio of the volume of openings in a rock to the total volume of the rock.
POROSITY, PRIMARY
Shall mean the porosity that represents the original pore openings when a rock or sediment formed.
POROSITY, SECONDARY
Shall mean the porosity that has been caused by fractures or weathering in a rock or sediment after it has been formed.
PUMPING TEST
Shall mean a test made by pumping a well for a period of time and observing the change in hydraulic head in the aquifer.
PUMPING TEST, CONSTANT RATE
Shall mean a pumping test during which the discharge rate from the pumping well is maintained at a constant rate for the duration of the test.
RECHARGE AREA
Shall mean an area in which there are downward components of head in an aquifer. Infiltration moves downward to deeper parts of an aquifer in a recharge area.
RECHARGE BOUNDARY
Shall mean an aquifer system boundary that adds water to the aquifer such as a stream or lake.
RECHARGE, AQUIFER
Shall mean the volume of water that infiltrates to an aquifer.
RECHARGE, GROUNDWATER
Shall mean the volume of water that infiltrates to a saturated zone.
RECOVERY
Shall mean the rate at which the water level in a well rises after the pump has been shut off. Recovery is the inverse of drawdown.
SATURATED ZONE
Shall mean the zone in which the voids in the rock or soil are filled with water at a pressure greater than atmospheric. The water table is the top of the saturated zone in an unconfined aquifer.
SPECIFIC CAPACITY
Shall mean an expression of the productivity of a well, obtained by dividing the pumping rate by the drawdown level. Should be described on the basis of the number of hours pumping prior to measurement of drawdown. Value will generally decrease with increased time of pumping.
STATIC WATER LEVEL
Shall mean the depth to water in the well prior to the commencement of pumping.
STORAGE COEFFICIENT
Shall mean the volume of water an aquifer releases from or takes into storage per unit surface area of the aquifer per unit change in head. It equals the product of specific storage and aquifer thickness. Also known as storativity.
TRANSMISSIVITY
Shall mean the rate at which water of a prevailing density and viscosity is transmitted through a unit width of an aquifer or confining bed under a unit hydraulic gradient. Transmissivity equals hydraulic conductivity times aquifer thickness.
UNSATURATED ZONE
Shall mean the zone between ground surface and the water table. Pore spaces in the unsaturated zone contain water at pressures less than atmospheric.
WATER TABLE
Shall mean the surface in an unconfined aquifer or confining bed at which the pore water pressure is atmospheric.
WELL INTERFERENCE
Shall mean the result of two or more pumping wells, the drawdown cones of which intercept. At a given location, the total well interference is the sum of the drawdowns due to each individual well.