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For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
ACCELERATED EROSION. Erosion caused by development activities that exceed the natural processes by which the surface of the land is worn away by the action of water, wind or chemical action.
APPLICANT. A property owner or agent of a property owner who has filed an application for a storm water management permit.
BUILDING. Any structure, either temporary or permanent, having walls and a roof, designed for the shelter of any person, animal or property, and occupying more than 100 square feet of area.
CHANNEL. A natural or artificial watercourse with a definite bed and banks that conducts continuously or periodically flowing water.
DEDICATION. The deliberate appropriation of property by its owner for general public use.
DETENTION. The temporary storage of storm runoff in a storm water management practice, with the goals of controlling peak discharge rates and providing gravity settling of pollutants.
DETENTION FACILITY. A detention basin or alternative structure designed for the purpose of temporary storage of stream flow or surface runoff, and gradual release of stored water at controlled rates.
DEVELOPER. A person who undertakes land disturbance activities.
DRAINAGE EASEMENT. A legal right granted by a landowner to a grantee allowing the use of private land for storm water management purposes.
EROSION AND SEDIMENT CONTROL PLAN. A plan designed to minimize the accelerated erosion and sediment runoff at a site during construction activities.
FEE IN LIEU. A payment of money in place of meeting all or part of the storm water performance standards required by this chapter.
HOTSPOT. An area where land use or activities generate highly contaminated runoff, with concentrations of pollutants in excess of those typically found in storm water.
HYDROLOGIC SOIL GROUP (HSG). A Natural Resource Conservation Service classification system in which soils are categorized into four runoff potential groups. The groups range from A soils, with high permeability and little runoff production, to D soils, with low permeability and much more runoff production.
IMPERVIOUS COVER. Those surfaces that cannot effectively infiltrate rainfall (e.g., building rooftops, pavement, sidewalks, driveways, and the like).
INDUSTRIAL STORM WATER PERMIT. A National Pollutant Discharge Elimination System permit issued to a commercial industry or group of industries, which regulates the pollutant levels associated with industrial storm water discharges, or specifies on-site pollution control strategies.
INFILTRATION. The process of percolating storm water into the subsoil.
INFILTRATION FACILITY. Any structure or device designed to infiltrate retained water to the subsurface. These facilities may be above grade or below grade.
JURISDICTIONAL WETLAND. An area that is inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support a prevalence of vegetation typically adapted for life in saturated soil conditions, commonly known as hydrophytic vegetation.
LAND DISTURBANCE ACTIVITY. Any activity which changes the volume or peak flow discharge rate of rainfall runoff from the land surface. This may include the grading, digging, cutting, scraping or excavating of soil, placement of fill materials, paving, construction, substantial removal of vegetation, or any activity which bares soil or rock, or involves the diversion or piping of any natural or man-made watercourse.
LANDOWNER. The legal or beneficial owner of land, including those holding the right to purchase or lease the land, or any other person holding proprietary rights in the land.
MAINTENANCE AGREEMENT. A legally recorded document that acts as a property deed restriction, and which provides for long-term maintenance of storm water management practices.
NON-POINT SOURCE POLLUTION. Pollution from any source other than from any discernible, confined and discrete conveyances, and shall include, but not be limited to, pollutants from agricultural, silvicultural, mining, construction, subsurface disposal and urban runoff sources.
OFF-SITE FACILITY. A storm water management measure located outside the subject property boundary described in the permit application for land development activity.
OFFSET FEE. Monetary compensation paid to a local government for failure to meet pollutant load reduction targets.
ON-SITE FACILITY. A storm water management measure located within the subject property boundary described in the permit application for land development activity.
RECHARGE. The replenishment of underground water reserves.
REDEVELOPMENT. Any construction, alteration or improvement exceeding 5,000 square feet in areas where existing land use is high density commercial, industrial, institutional or multi-family residential.
STOP WORK ORDER. An order which, when issued, requires that all construction activity on a site be stopped.
STORM WATER MANAGEMENT. The use of structural or nonstructural practices designed to reduce storm water runoff pollutant loads, discharge volumes, peak flow discharge rates and detrimental changes in stream temperature that affect water quality and habitat.
STORM WATER RETROFIT. A storm water management practice designed for an existing development site that previously had either no storm water management practice in place, or a practice inadequate to meet the storm water management requirements of the site.
STORM WATER RUNOFF. Flow on the surface of the ground resulting from precipitation.
STORM WATER TREATMENT PRACTICES (STPs). Measures, either structural or nonstructural, that are determined to be the most effective practical means of preventing or reducing point source or non-point source pollution inputs to storm water runoff and water bodies.
WATER QUALITY VOLUME (WQv). The storage needed to capture and treat 90% of the average annual storm water runoff volume. Numerically, WQv will vary as a function of long-term rainfall statistical data.
WATERCOURSE. A permanent or intermittent stream or other body of water, either natural or man-made, which gathers or carries surface water.
(Ord. 0504, passed 12-12-05)