As used in this article, unless the context requires a different meaning: “Agreement in lieu of a plan” means a contract between the VESMP authority or the Board acting as a VSMP authority and the owner or permittee that specifies methods that shall be implemented to comply with the requirements of this article for the construction of a (i) single-family detached residential structure or (ii) farm building or structure on a parcel of land with a total impervious cover percentage, including the impervious cover from the farm building or structure to be constructed, of less than five percent; such contract may be executed by the VESMP authority in lieu of a soil erosion control and stormwater management plan or by the Board acting as a VSMP authority in lieu of a stormwater management plan. “Applicant” means any person submitting a soil erosion control and stormwater management plan to a VESMP authority, or a stormwater management plan to the Board when it is serving as a VSMP authority, for approval in order to obtain authorization to commence a land-disturbing activity. “CWA” means the federal Clean Water Act (33 U.S.C. § 1251 et seq.), formerly referred to as the Federal Water Pollution Control Act or Federal Water Pollution Control Act Amendments of 1972, P.L. 92-500, as amended by P.L. 95-217, P.L. 95-576, P.L. 96-483, and P.L. 97-117, or any subsequent revisions thereto. “Department” means the Department of Environmental Quality. “Director” means the Director of the Department of Environmental Quality. “Erosion impact area” means an area of land that is not associated with a current land-disturbing activity but is subject to persistent soil erosion resulting in the delivery of sediment onto neighboring properties or into state waters. This definition shall not apply to any lot or parcel of land of 10,000 square feet or less used for residential purposes or any shoreline where the erosion results from wave action or other coastal processes. “Farm building or structure” means the same as that term is defined in § 36-97 and also includes any building or structure used for agritourism activity, as defined in § 3.2-6400, and any related impervious surfaces including roads, driveways, and parking areas. “Flooding” means a volume of water that is too great to be confined within the banks or walls of the stream, water body, or conveyance system and that overflows onto adjacent lands, thereby causing or threatening damage. “Land disturbance” or “land-disturbing activity” means a man-made change to the land surface that may result in soil erosion or has the potential to change its runoff characteristics, including construction activity such as the clearing, grading, excavating, or filling of land. “Land-disturbance approval” means the same as that term is defined in § 62.1-44.3. “Municipal separate storm sewer” or “MS4″ means the same as that term is defined in § 62.1-44.3. “Municipal Separate Storm Sewer System Management Program” means a management program covering the duration of a permit for a municipal separate storm sewer system that includes a comprehensive planning process that involves public participation and intergovernmental coordination, to reduce the discharge of pollutants to the maximum extent practicable, to protect water quality, and to satisfy the appropriate water quality requirements of the CWA and regulations, and this article and its attendant regulations, using management practices, control techniques, and system, design, and engineering methods, and such other provisions that are appropriate. “Natural channel design concepts” means the utilization of engineering analysis and fluvial geomorphic processes to create, rehabilitate, restore, or stabilize an open conveyance system for the purpose of creating or recreating a stream that conveys its bankfull storm event within its banks and allows larger flows to access its bankfull bench and its floodplain. “Nonpoint source pollution” means pollution such as sediment, nitrogen, phosphorus, hydrocarbons, heavy metals, and toxics whose sources cannot be pinpointed but rather are washed from the land surface in a diffuse manner by stormwater. “Owner” means the same as that term is defined in § 62.1-44.3. For a regulated land-disturbing activity that does not require a permit, “owner” also means the owner or owners of the freehold of the premises or lesser estate therein, mortgagee or vendee in possession, assignee of rents, receiver, executor, trustee, lessee, or other person, firm, or corporation in control of a property. “Peak flow rate” means the maximum instantaneous flow from a prescribed design storm at a particular location. “Permit” means a Virginia Pollutant Discharge Elimination System (VPDES) permit issued by the Board pursuant to § 62.1-44.15 for stormwater discharges from a land-disturbing activity or MS4. “Permittee” means the person to whom the permit is issued. “Runoff volume” means the volume of water that runs off the land development project from a prescribed storm event. “Rural Tidewater locality” means any locality that is (i) subject to the provisions of the Chesapeake Bay Preservation Act (§ 62.1-44.15:67 et seq.) and (ii) eligible to join the Rural Coastal Virginia Community Enhancement Authority established by Chapter 76 (§ 15.2-7600 et seq.) of Title 15.2. “Small construction activity” means:
1. A construction activity, including clearing, grading, or excavating, that results in land disturbance of equal to or greater than one acre and less than five acres. “Small construction activity” also includes the disturbance of less than one acre of total land area that is part of a larger common plan of development or sale if the larger common plan will ultimately disturb an area equal to or greater than one acre and less than five acres. “Small construction activity” does not include routine maintenance that is performed to maintain the original line and grade, hydraulic capacity, or original purpose of the facility. The Board may waive the otherwise applicable requirements in a general permit for a stormwater discharge from construction activities that disturb less than five acres where stormwater controls are not needed based on an approved total maximum daily load (TMDL) that addresses the pollutants of concern or, for nonimpaired waters that do not require TMDLs, an equivalent analysis that determines allocations for small construction sites for the pollutants of concern or that determines that such allocations are not needed to protect water quality based on consideration of existing in-stream concentrations, expected growth in pollutant contributions from all sources, and a margin of safety. For the purpose of this subdivision, the pollutants of concern include sediment or a parameter that addresses sediment, such as total suspended solids, turbidity, or siltation, and any other pollutant that has been identified as a cause of impairment of any water body that will receive a discharge from the construction activity. The operator shall certify to the Board that the construction activity will take place, and that stormwater discharges will occur, within the drainage area addressed by the TMDL or provide an equivalent analysis. As of the start date in the table of start dates for electronic submissions of Virginia Pollutant Discharge Elimination System (VPDES) information within the regulation governing the implementation of electronic reporting requirements for certain VPDES permittees, facilities, and entities, all certifications submitted in support of such waiver shall be submitted electronically by the owner or operator to the Department in compliance with (i) this subdivision; (ii) 40 C.F.R. Part 3, including, in all cases, 40 C.F.R. Part 3 Subpart D; (iii) the regulation addressing signatories to state permit applications and reports; and (iv) regulations addressing the VPDES electronic reporting requirements. Such regulations addressing the VPDES electronic reporting requirements shall not undo existing requirements for electronic reporting. Prior to such date, and independent of the regulations addressing the VPDES electronic reporting requirements, a permittee shall be required to report electronically if specified by a particular permit.
2. Any other construction activity designated by either the Board or the Regional Administrator of the U.S. Environmental Protection Agency, based on the potential for contribution to a violation of a water quality standard or for significant contribution of pollutants to surface waters. “Soil erosion” means the movement of soil by wind or water into state waters or onto lands in the Commonwealth. “Soil Erosion Control and Stormwater Management plan” or “plan” means a document describing methods for controlling soil erosion and managing stormwater in accordance with the requirements adopted pursuant to this article. “Stormwater,” for the purposes of this article, means precipitation that is discharged across the land surface or through conveyances to one or more waterways and that may include stormwater runoff, snow melt runoff, and surface runoff and drainage. “Stormwater management plan” means a document containing material describing methods for complying with the requirements of a VSMP. “Subdivision” means the same as that term is defined in § 15.2-2201. “Virginia Erosion and Sediment Control Program” or “VESCP” means a program approved by the Board that is established by a VESCP authority pursuant to Article 2.4 (§ 62.1-44.15:51 et seq.) for the effective control of soil erosion, sediment deposition, and nonagricultural runoff associated with a land-disturbing activity to prevent the unreasonable degradation of properties, stream channels, waters, and other natural resources. The VESCP shall include, where applicable, such items as local ordinances, rules, policies and guidelines, technical materials, and requirements for plan review, inspection, and evaluation consistent with the requirements of Article 2.4 (§ 62.1-44.15:51 et seq.). “Virginia Erosion and Sediment Control Program authority” or “VESCP authority” means a locality that is approved by the Board to operate a Virginia Erosion and Sediment Control Program in accordance with Article 2.4 (§ 62.1-44.15:51 et seq.). Only a locality for which the Department administered a Virginia Stormwater Management Program as of July 1, 2017, is authorized to choose to operate a VESCP pursuant to Article 2.4 (§ 62.1-44.15:51 et seq.). “Virginia Erosion and Stormwater Management Program” or “VESMP” means a program established by a 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 this article. “Virginia Erosion and Stormwater Management Program authority” or “VESMP authority” means the Board or a locality approved by the Board to operate a Virginia Erosion and Stormwater Management Program. For state agency or federal entity land-disturbing activities and land-disturbing activities subject to approved standards and specifications, the Board shall serve as the VESMP authority. “Virginia Stormwater Management Program” or “VSMP” means a program established by the Board pursuant to § 62.1-44.15:27.1 on behalf of a locality on or after July 1, 2014, to manage the quality and quantity of runoff resulting from any land-disturbing activity that (i) disturbs one acre or more of land or (ii) disturbs less than one acre of land and is part of a larger common plan of development or sale that results in one acre or more of land disturbance. “Virginia Stormwater Management Program authority” or “VSMP authority” means the Board when administering a VSMP on behalf of a locality that, pursuant to subdivision B 3 of § 62.1-44.15:27, has chosen not to adopt and administer a VESMP. “Water quality technical criteria” means standards set forth in regulations adopted pursuant to this article 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 this article 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.