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Town means an incorporated town. Two-year storm means a storm that is capable of producing rainfall expected to be equaled or exceeded on the average of once in two years. It may also be expressed as an exceedance probability with a 50% chance of being equaled or exceeded in any given year. Virginia Erosion and Stormwater Management Act or "VESMA" means Article 2.3 (§ 62.1-44.15:24 et seq.) of Chapter 3.1, State Water Control Law, of Title 62.1 of the Code of Virginia. Virginia Erosion and Stormwater Management Program authority or "VESMP" means a program established by the VESMP authority for the effective control of soil erosion and sediment deposition and the management of the quality and quantity of runoff resulting from land -disturbing activities to prevent the unreasonable degradation of properties, stream channels, waters, and other natural resources. The program shall include such items as local ordinances, rules, requirements for permits and land -disturbance approvals, policies and guidelines, technical materials, and requirements for plan review, inspection, and enforcement consistent with the requirements of the VESMA. Virginia Erosion and Stormwater Management Program Authority or "VESMP Authority" means the city. Virginia Pollutant Discharge Elimination System (VPDES) permit or "VPDES permit" means a document issued by the department pursuant to the State Water Control Law authorizing, under prescribed opinions, the potential or actual discharge of pollutants from point source to surface waters. Virginia Stormwater BMP Clearinghouse means a collection that contains detailed design standards and specifications for control measures that may be used in Virginia to comply with the requirements of the VESMA and associated regulations. Virginia Stormwater Management Handbook means a collection of pertinent information that provides general guidance for compliance with the VESMA and associated regulations and is developed by the department with advice from a stakeholder advisory committee. Wasteload allocation or "wasteload" means the portion of a receiving surface water's loading or assimilative capacity allocated to one of its existing or future point sources of pollution. Wasteload allocations are a type of water quality -based effluent limitation. Water quality technical criteria means standards set forth in regulations adopted pursuant to the VESMA that establish minimum design criteria for measures to control nonpoint source pollution. Water quantity technical criteria means standards set forth in regulations adopted pursuant to the VESMA that establish minimum design criteria for measures to control localized flooding and stream channel erosion. Watershed means a defined land area drained by a river or stream, karst system, or system of connecting rivers or streams such that all surface water within the area flows through a single outlet. In karst areas, the karst feature to which water drains may be considered the single outlet for the watershed. Wetlands means those areas that are inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas. Sec. 11.1-3. Virginia Erosion and Stormwater Management Program established. Pursuant to § 62.1-44.15:27 of the Code of Virginia, the city hereby establishes a Viginia Erosion and Stormwater Management Program for land -disturbing activities and adopts the Virginia Erosion and Stormwater Management Regulation that specifies standards and specifications for VESMPs promulgated by the State Water Control Board for the purposes set out in section 11.1-1 of this article. The city also adopts the Virginia Stormwater Management Handbook, the Virginia Erosion and Sediment Control Handbook, and the BMP Page 10 of 27