“AKART” means all known, available, and reasonable methods of prevention, control, and treatment (AKART). See also the State Water Pollution Control Act, RCW 90.48.010 and 90.48.520.

“Allowable discharges” means types of discharges that are not considered illegal discharges for the purposes of this chapter unless the city determines that the type of discharge, whether singly or in combination with others, is causing or is likely to cause pollution of surface water or groundwater.

“Best management practices (BMPs)” means schedules of activities, prohibitions of practices, maintenance procedures, and structural and/or managerial practices approved by the Department of Ecology that, when used singly or in combination, prevent or reduce the release of pollutants and other adverse impacts to waters of Washington State.

“City” means city of Lacey, Washington.

“Conditionally allowable discharges” means types of discharges that are not considered illegal discharges for the purposes of this chapter if they meet the stated conditions, or unless the city determines that the type of discharge, whether singly or in combination with others, is causing or is likely to cause pollution to surface water or groundwater.

“Groundwater” means water in a saturated zone or stratum beneath the surface of the land or below a surface water body.

“Hazardous materials” means substances that may create a public nuisance or constitute a hazard to humans, animals, fish or fowl, or any solid, dangerous, or extremely hazardous waste, as defined by Chapter 173-303 or 173-304 WAC. Harmful materials also include substances that, when released into the environment, may cause non-compliance with the following chapters of the WAC: 246-290, 173-200, 173-201, 173-204, and/or 173-340.

“Hyperchlorinated” means water that contains more than ten mg/liter chlorine.

“Illicit connection” means any infrastructure connection to the MS4 that is not intended, permitted, or used for collecting and conveying stormwater or non-stormwater discharges allowed as specified in the city’s NPDES municipal stormwater permit. Examples include sanitary sewer connections, floor drains, channels, pipelines, conduits, inlets, or outlets that are connected directly to the MS4.

“Illicit discharge” means all non-stormwater discharges to stormwater drainage systems that cause or contribute to a violation of state water quality, sediment quality or groundwater quality standards, including but not limited to sanitary sewer connections, industrial process water, interior floor drains, car washing, and greywater systems.

“Municipal separate storm sewer system (MS4)” means a conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains):

“National Pollutant Discharge Elimination System (NPDES) stormwater discharge permit” means a permit issued by the Environmental Protection Agency (EPA) (or by the Washington Department of Ecology under authority delegated pursuant to 33 U.S.C. 1342(b)) that authorizes discharge of pollutants to waters of the United States, whether the permit is applicable on an individual, group, or general area-wide basis.

“Non-stormwater discharges to the stormwater system” means discharges to any portion of the public or privately owned stormwater system that are not composed entirely of stormwater (i.e., rainfall or snow melt). Examples may include, but are not limited to, sanitary wastewater, laundry wastewater, non-contact cooling water, vehicle wash wastewater, radiator flushing wastewater, spills from roadway accidents, and improperly disposed motor oil, solvents, lubricants, and paints.

“Person” means any individual, partnership, corporation, association, organization, cooperative, public or municipal corporation, agency of the state, or local governmental unit, however designated.

“Pollutant” means anything which causes or contributes to pollution. Pollutants may include, but are not limited to: paints, varnishes and solvents; oil and other automotive fluids; nonhazardous liquid and solid wastes and yard wastes; refuse, rubbish, garbage, litter, or other discarded or abandoned objects 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.

“Source control BMP” means a structure or operation that is intended to prevent pollutants from coming into contact with stormwater through physical separation of areas or careful management of activities that are sources of pollutants. Source control BMPs are classified as structural or operational. Structural source control BMPs are physical, structural, or mechanical devices or facilities that are intended to prevent pollutants from entering stormwater. Operational BMPs are non-structural practices that prevent or reduce pollutants from entering stormwater.

“Stormwater” means surface runoff due to precipitation or snowmelt. That portion of precipitation that does not naturally percolate into the ground or evaporate, but flows via overland flow, interflow, pipes, and other features of the stormwater drainage system to a surface water body or constructed BMP.

“Stormwater BMP/facility” means a constructed component of a stormwater drainage system, designed or constructed to perform a particular function or multiple functions. Stormwater BMPs/facilities include, but are not limited to, pipes, swales, ditches, culverts, street gutters, detention ponds, retention ponds, constructed wetlands, infiltration devices, catch basins, oil/water separators, bioretention, permeable pavement, and biofiltration swales. Stormwater BMPs/facilities are described in the Stormwater Design Manual. “Stormwater BMP/facility” includes both public and privately owned facilities.

“Stormwater Design Manual” means the city of Lacey Stormwater Design Manual as currently adopted.

“Stormwater drainage system” means any stormwater facilities, including the city’s municipal separate storm sewer system, by which stormwater is collected and/or conveyed, including but not limited to any roads with drainage systems, municipal streets, gutters, curbs, inlets, piped storm drains, pumping facilities, retention and detention basins, natural and human-made or altered drainage channels, reservoirs, and other drainage structures. “Stormwater drainage system” includes both public and privately owned features.

“Stormwater pollution prevention plan (SWPPP)” means a document which describes the best management practices and activities to be implemented by a person to identify sources of pollution or contamination at a premises and the actions to eliminate or reduce pollutant discharges to stormwater, stormwater conveyance systems, and/or receiving waters to the maximum extent practicable.

“Water body” means surface waters, including rivers, streams, lakes, marine waters, estuaries, and wetlands.

“Waters of the state” means those waters defined as “waters of the United States” in 40 CFR Subpart 122.2 within the geographic boundaries of Washington State and “waters of the state” as defined in Chapter 90.48 RCW which includes lakes, rivers, ponds, streams, inland waters, underground waters, salt waters, and all other surface waters and water courses within the jurisdiction of the state of Washington. (Ord. 1638 §1, 2023; Ord. 1525 §2 (part), 2017).