For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AQUIFER. A glacial formation, group of glacial formations, or part of a glacial formation that contains enough saturated permeable material to yield significant quantities of water.
DE MINIMIS QUANTITY. A specified amount of regulated substances, expressed in gallons and/or pounds, that is excluded from the provisions of the “WO” Wellhead Operation District and the “WP” Well Field Protection Overlay District regulations. Any use of regulated substances in excess of the deminimis quantities and not explicitly subject to exclusion is considered nonconforming.
DIRECT RECHARGE AREA. The portion of a drainage basin in which water infiltrating vertically from the surface will intercept the water table.
NONROUTINE MAINTENANCE. Activities necessary not more frequently than every 24 months to keep structures and equipment in good repair.
ONE-YEAR CAPTURE AREA. The area around protected public water supply well fields delineated by the one-year travel time contour.
OVERLAY DISTRICT. The superimposition of a special district designation, whereby certain regulations and requirements apply in addition to those of the underlying zoning district to which the designation is added.
POTABLE WATER. Water that is satisfactory for drinking, culinary, and domestic purposes, meeting current drinking water standards.
PROTECTED PUBLIC WATER SUPPLY. A public water system which services at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents, and having a one-year capture area defined through appropriate hydrologic studies.
RECHARGE LAGOON. A body of water designated and maintained by humans to add water to the groundwater at a rate greater than that occurring naturally.
REGULATED SUBSTANCES. Chemicals and mixtures of chemicals which are health hazards. Materials packaged for personal or household use as food or drink for humans or other animals are not REGULATED SUBSTANCES. REGULATED SUBSTANCES include:
(1) Chemicals for which there is scientific evidence that acute or chronic health effects may result from exposure including carcinogens, toxic and highly toxic agents, reproductive toxins, irritants, corrosives, sensitizers, hepatotoxins, nephrotoxins, neurotoxins, agents which act on the hematopoietic system, and agents which damage the lungs, skin, eyes, or mucous membranes;
(2) Mixtures of chemicals which have been tested as a whole and have been determined to be a health hazard;
(3) Mixtures of chemicals which have not been tested as a whole but which contain any chemical which has been determined to be a health hazard and which comprises 1% or greater of the composition on a weight per unit weight basis, and mixtures of chemicals which include a carcinogen if the concentration of the carcinogen in the mixture is 0.1% or greater of the composition on a weight per unit weight basis;
(4) Ingredients of mixtures prepared within the “WP” Well Field Protection Overlay District in cases where the ingredients are health hazards but comprise less than 0.1% of the mixture on a weight per unit basis if carcinogenic, or less than 1% of the mixture on a weight per unit weight basis if non-carcinogenic; and
(5) Petroleum and non-solid petroleum derivatives (except non-PCB dielectric fluids).
TRAVEL TIME CONTOUR. A locus of points from which water takes an equal amount of time to reach a given destination such as a well or well field.
UNDERGROUND STORAGE TANK. Any one or combination of tanks (including underground pipes connected thereto) which is used to contain an accumulation of regulated substances, and the volume of which (including the volume of underground pipes connected thereto) is 10% or more beneath the surface of the ground. Flow-through process tanks and septic tanks approved by the Health Department or State Environmental Protection Agency, as applicable, are excluded from the definition of UNDERGROUND STORAGE TANKS.
WELL FIELD. A tract of land that contains one or a number of wells for supplying water.
ZONE OF INFLUENCE. A zone delineated by iso-travel time contours around well fields. The zone is calculated, based on the rate of movement of groundwaters in the vicinity of wells with an allowance for the dispersion of a pollutant entering into and moving with the groundwater.
(1985 Code, § 8-3-6F.) (Ord. 1996-5, passed - -1996)