For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning. Any term not defined in this chapter shall have the meaning as defined in any chapter of the County Code or in the Md. Code, Natural Resources Article, §§ 8-1201 et seq. Any term not defined in the County Code in any chapter shall have its generally accepted meaning.
   BEST MANAGEMENT PRACTICES (BMPs). Conservation practices or systems of practices and management measures that minimize adverse impacts to the environment including surface water, groundwater flow and circulation patterns, and to the chemical, physical, and biological characteristics. BMPs include schedules of activities, prohibitions of practices, general good housekeeping practices, pollution prevention and educational practices, maintenance procedures, and other management practices to prevent or reduce the discharge of pollutants directly or indirectly to stormwater, receiving waters, or stormwater conveyance systems. BMPs also include treatment practices, operating procedures, and practices to control site runoff, spillage or leaks, sludge or water disposal, or drainage from raw materials storage.
   CLEAN WATER ACT. The Federal Water Pollution Control Act (33 U.S.C. §§ 1251 et seq.), and any subsequent amendments.
   COMAR. Code of Maryland Regulations.
   CONSTRUCTION ACTIVITY. An activity subject to NPDES construction permits, including a construction project resulting in land disturbance of one acre or more, clearing, grubbing, grading, excavating, and demolition.
   COUNTY SEPARATE STORM SEWER SYSTEM or CS4. A separate storm sewer system that is owned or maintained by the county and designed to convey stormwater runoff to a point of discharge into waters of the state.
   DRAINAGE BASIN. An area drained by an ordered stream system and classified by the highest order stream that forms its discharge.
   ENHANCEMENT. An action performed to provide additional protection to create or improve the function of an ecosystem.
   FACILITY. Any structure or complex of structures where runoff is discharged into a CS4.
   HAZARDOUS MATERIALS. Any material, including any substance, waste, or combination thereof, which because of its quantity, concentration, or physical, chemical, or infectious characteristics may cause or significantly contribute to a substantial present or potential hazard to human health, safety, property, or the environment when improperly treated, stored, transported, disposed of, or otherwise managed.
   ILLICIT CONNECTION. A surface or subsurface drain or conveyance which allows an illicit discharge to enter the storm drain system, including but not limited to:
      (1)   A conveyance which allows a nonstormwater discharge including sewage, process wastewater, and wash water to enter the storm drain system or a connection to the storm drain system from an indoor drain or sink, regardless of whether the drain or connection had been previously allowed, permitted, or approved by an authorized enforcement agency; or
      (2)   A drain or conveyance connected from a commercial or industrial land use to the storm drain system which has not been documented in plans, maps, or equivalent records and approved by an authorized enforcement agency.
   ILLICIT DISCHARGE. Any discharge to any CS4 that is not composed entirely of stormwater runoff except discharges resulting from common residential stormwater runoff, firefighting activities, or from any legally permitted discharge. The direct discharge of any sanitary discharge, including domestic sewage or other pollutants into any CS4, will be considered an ILLICIT DISCHARGE.
   INDUSTRIAL ACTIVITY. An activity subject to NPDES industrial permits as defined in 40 C.F.R. § 122.26(b)(14).
   NPDES. National pollutant discharge elimination system.
   NPDES STORMWATER DISCHARGE PERMIT. A permit issued by the Environmental Protection Agency (EPA) or the state that authorizes the discharge of pollutants to waters of the United States.
   OUTFALL. The point where a storm sewer system discharges.
   PERSON. Includes the federal government, the state, any county, municipal corporation, or other political subdivision of the state, or any of their units, or an individual, receiver, trustee, guardian, executor, administrator, fiduciary, or representative of any kind, or any partnership, firm, association, public or private corporation, or any other entity.
      (1)   A contaminant that may result in any alteration of the physical, chemical, or biological properties of groundwater or surface water, including any change in temperature, taste, color, turbidity, or odor of the receiving waters or discharge or deposit of any organic matter, harmful organism, or liquid, gaseous, solid, radioactive, or other substance into groundwater or surface water that may render the waters harmful, or detrimental to the public health or welfare, to any domestic, commercial, industrial, agricultural, recreational, or other legitimate beneficial use of the water, to any livestock, wild animals, birds, fish, or other aquatic species that may use the water; or
      (2)   Any substance that may cause or contribute to pollution, including but not limited to paints, varnishes, and solvents; oil and other automotive fluids; non-hazardous liquid and solid wastes and yard wastes; refuse, rubbish, garbage, litter, or other discarded or abandoned objects, ordnances, and accumulations, so that same may cause or contribute to pollution; floatables; pesticides, herbicides, and fertilizers; hazardous substances and wastes; sewage, fecal coliform and pathogens; dissolved and particulate metals; animal wastes; wastes and residues that result from constructing a building or structure; and noxious or offensive matter of any kind.
   SEPARATE STORM SEWER SYSTEM. The equivalent of a municipal separate storm sewer system (MS4) as defined in 40 C.F.R. § 122.26. A conveyance or system of conveyances including but not limited to, drainage systems, public streets, catch basins, curbs, gutters, ditches, swales, constructed channels, storm drains, associated underground piping and any on-site stormwater management facilities that are:
      (1)   Designed or used for the collection and conveyance of stormwater runoff (either immediate or delayed) from any form of precipitation event;
      (2)   Not any part of a combined sewer system; and
      (3)   Not part of or discharging into any publicly owned treatment works (POTW) as defined in 40 C.F.R. § 122.2.
   SIGNIFICANT MATERIALS. Includes but is not limited to: raw materials, petroleum derivative products; any controlled hazardous substances pursuant to COMAR 26.13; industrial waste pursuant to COMAR; infectious waste pursuant to COMAR; materials such as solvents or detergents; finished materials such as metallic products; raw materials used in food processing or production; fertilizers; pesticides; waste products such as ashes, slag, and sludge, or any other material that could result in pollution of waters of the state as a constituent in stormwater discharge.
   STORM DRAINAGE SYSTEM. Any facilities by which stormwater is collected or conveyed, including but not limited to any roads with drainage systems, streets, gutters, curbs, inlets, piped storm drains, pumping facilities, retention and detention basins, natural and man-made or altered drainage channels, reservoirs, and other drainage structures.
   STORMWATER. Any surface flow, runoff, and drainage consisting entirely of water resulting from any form of natural precipitation.
   STRUCTURE. Anything constructed, the use of which requires fixed location on the ground or which is attached to something having fixed location.
   WASTEWATER. Any water or other liquid, other than uncontaminated stormwater, discharged from a facility.
   WATERCOURSE. Any natural or artificial stream, river, creek, ditch, channel, canal, conduit, culvert, drain, waterway, gully, ravine, or wash in and including any adjacent area that is subject to inundation from overflow or flood waters and their associated wetlands.
(2004 Code, § 105-2) (Ord. 04-03, passed 4-1-2004)