Orange County NC Website
Browse       Search
133 <br /> ARTICLE 22 - DEFINITIONS <br /> Best Management Practices (BMPs) A structural or non-structural management-based practice <br /> used singularly or in combination to reduce non-point source pollution to receiving waters in <br /> order to achieve water quality protection goals. (See also, Detention Pond and Engineered <br /> Stormwater Controls) <br /> Critical Area The land area within one-half mile of the normal pool of an existing or proposed <br /> watersupply impoundment, or the branch of the first major tributary, whichever is farther. <br /> Detention Pond A engineered stormwater control consisting of a pond constructed and <br /> maintained in accordance with Appendix of this Ordinance, which allows for pollutants to <br /> settle and provides for the gradual release of the impounded water. The detention pond is the <br /> Best Management Practice which must be used within protected watersheds when engineered <br /> stormwater controls are required. (See also, Best Management Practices and Engineered <br /> Stormwater Controls) <br /> Engineered (or Structural) Stormwater Controls A structural Best Management Practice <br /> (BMP) used to reduce non-point source pollution to receiving waters in order to achieve water <br /> quality protection goals. (See also Best Management Practices and Detention Pond) <br /> High-Density Option One of two approaches available for for development in some watershed <br /> overlay districts. Generally, the high-density option relies on density limits and engineered <br /> stormwater controls to minimize the risk of water pollution. <br /> Impervious Surface A surface composed of any material which impedes or prevents the <br /> natural infiltration of water into the soil. Such surfaces include all concrete, asphalt and gravel <br /> surfaces. These include, but are not be limited to, streets and parking areas, sidewalks, patios, <br /> and structures which cover the land. <br /> Infiltration The absorption of stormwater run-off into the ground. Infiltration allows for <br /> pollutants to be filtered from the water prior to its reaching the groundwater table, preventing <br /> the deposit of the pollutants directly into drinking water supplies. <br /> Landfill, Discharging A landfill facility with liners, monitoring equipment and other measures <br /> to detect and/or prevent leachate from entering the environment and in which the leachate is <br /> treated on site and discharged to a receiving stream. <br /> Landfill, Non-discharging A landfill facility which does not discharge leacheate into a <br /> receiving stream. <br /> Low-Density Option One of two approaches available for development in watershed overlay <br /> districts. Generally, the low-density option relies on density and impervious surface limits to <br /> minimize the risk of water pollution. <br /> Non-Point Source Pollution Pollution which enters waters mainly as a result of precipitation <br />