The definitions contained in this section pertain to water resources protection areas. As used in this article, the following terms shall have the meanings indicated:
ABOVEGROUND STORAGE TANK (AST)A single containment vessel greater than 250 gallons as defined in the Delaware Regulations Governing Aboveground Storage Tanks. 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 diesels, heating fuel or kerosene are subject to the design, construction, operations, and maintenance requirements of the Delaware AST regulations.
BEST MANAGEMENT PRACTICESStructural, nonstructural and managerial techniques that are recognized to be the most effective and practical means to control nonpoint source pollutants yet are compatible with the productive use of the resource to which they are applied; used in both urban and agricultural areas.
EXCELLENT GROUNDWATER RECHARGE AREASThose areas with a high percentage of sand and gravel that have "excellent" potential for recharge as determined through a Stack Unit Mapping Analysis delineated by the Delaware Geological Survey (DGS) and presented in the Report of Investigations No. 66, Ground-water Recharge Potential Mapping in Kent and Sussex Counties, Delaware, Geological Survey, 2004.
GREEN TECHNOLOGY BEST MANAGEMENT PRACTICES (BMPs)Those practices that achieve stormwater management objectives by applying the principles of filtration, infiltration and storage most often associated with natural vegetation and undisturbed soils while minimizing a reliance on structural components. They may also be constructed using an imported soil medium and planted with vegetation designed to promote the natural hydrologic process. These practices include, but are not limited to, vegetative filtration, riparian buffer plantings, bioretention areas, vegetative flow conveyance, as well as recharge and surface storage in undisturbed natural areas.
HAZARDOUS WASTEA solid waste, or combination of solid wastes, that, 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.
IMPERVIOUS COVERThe sum of parking lots, roads, buildings, sidewalks, or other surfaces through which rainwater cannot pass or infiltrate the soil.
INFILTRATIONThe passage or movement of water through the soil profile.
LEADERSHIP IN ENERGY AND ENVIRONMENTAL DESIGN (LEED)A rating system developed and administered by the U.S. Green Building Council based in Washington D.C. It is designed to promote design and construction practices that increase profitability while reducing the negative environmental impacts of buildings and improving occupant health and well-being. The LEED rating system offers four certification levels for new construction which includes Certified, Silver, Gold, and Platinum, corresponds to the number of credits accrued in five green design categories: sustainable sites, water efficiency, energy and atmosphere, materials and resources, and indoor environmental quality. LEED standards cover new commercial construction, major renovation projects, interior projects, and existing building operations.
PUBLIC DRINKING WATER SYSTEMA community, noncommunity, or nontransient noncommunity water system that 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 WELLAny well from which the water is used to serve a community water system as defined in the Delaware State Regulations Governing Public Drinking Water Systems.
RUNOFFThat portion of precipitation or snow melt that has not evaporated or infiltrated into the soil, but flows on land or impervious surfaces.
SANITARY LANDFILLA 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.
STORMWATERWater runoff from the surface of land resulting from precipitation or snow or ice melts.
STORMWATER MANAGEMENTA. For water quantity control, a system of vegetative, structural, and other measures that may control the volume and rate of stormwater runoff that may be caused by land-disturbing activities or activities upon the land; and
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 upon the land.
UNDERGROUND STORAGE TANK (UST)One or a combination of tanks including underground pipes, the volume of which is 10% or more below ground, as defined in the Delaware Regulations Governing Underground Storage Tank Systems, dated March 12, 1995. 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.
WATER QUALITYThose 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 QUANTITYA. Those characteristics of stormwater runoff that relate to the volume of stormwater runoff to downstream-gradient areas resulting from land-disturbing activities;
Those characteristics of stormwater that relate to the volume of stormwater that infiltrates the land surface and enters the underlying aquifer.
WELLHEAD PROTECTION AREASSurface and subsurface area surrounding a water well or well field supplying a public water system through which contaminants are likely to reach such well, or well field.
