Chapter 13.05 DEFINITIONS

The definitions in this chapter apply throughout this title unless the context clearly requires otherwise. Words, terms, expressions, abbreviations, and acronyms peculiar to the art or science of sewerage not herein defined shall have the respective meanings given in “Criteria for Sewage Works Design,” published by the Washington State Department of Ecology. (Ord. 13-09 § 2 (Exh. 1))

13.05.010 AKART.

“AKART” means all known, available, and reasonable methods of prevention, control and treatment. AKART represents the most current methodology that can be reasonably required for preventing, controlling, or abating the pollutants associated with a discharge. (Ord. 13-09 § 2 (Exh. 1))

13.05.015 Applicant.

“Applicant” means a property owner or a public agency or public or private utility that owns a right-of-way or other easement or has been adjudicated the right to such an easement under RCW 8.12.090, or any person or entity designated or named in writing by the property or easement owner to be the applicant, in an application for a development proposal, permit or approval. (Ord. 13-09 § 2 (Exh. 1))

13.05.020 Basin plan.

“Basin plan” means a plan and all implementing regulations and procedures including, but not limited to, capital projects, public education activities and land use management regulations adopted by ordinance for managing surface and stormwater within the basin. (Ord. 13-09 § 2 (Exh. 1))

13.05.025 Best management practices.

“Best management practices” or “BMPs” means the schedules of activities, prohibitions of practices, maintenance procedures, and structural and/or managerial practices, that when used singly or in combination prevent or reduce the release of pollutants and other adverse impacts to waters of Washington State. (Ord. 13-09 § 2 (Exh. 1))

13.05.030 CFR.

“CFR” means the Code of Federal Regulations. (Ord. 13-09 § 2 (Exh. 1))

13.05.035 Civil engineer.

“Civil engineer” means a person licensed and registered with the State of Washington as a professional engineer in civil engineering. (Ord. 13-09 § 2 (Exh. 1))

13.05.040 Class V well.

“Class V well” means a stormwater management facility that, under the UIC rule, is usually a shallow injection well that injects fluids above the uppermost groundwater aquifer. Class V wells must be registered by property owners with the Department of Ecology. (Ord. 13-09 § 2 (Exh. 1))

13.05.045 Closed depression.

“Closed depression” means an area that is low-lying, has no or such a limited surface water outlet that the area acts as a retention basin, has greater than 5,000 square feet at overflow elevation, and that the primary loss of water volume from which is through evapotranspiration and discharge into the ground rather than surface flow. (Ord. 13-09 § 2 (Exh. 1))

13.05.050 Commercial.

“Commercial” means premises used for or housing commercial or industrial concerns. For the purposes of this title, multifamily dwellings of two or more units, condominiums and manufactured home courts shall be included in this definition. (Ord. 13-09 § 2 (Exh. 1))

13.05.055 Construct or modify.

“Construct or modify” means to install a new drainage pipe or ditch or make improvements to an existing drainage pipe or ditch for purposes other than maintenance that either serves to concentrate previously unconcentrated surface and stormwater runoff or serves to increase, decrease or redirect the conveyance of surface and stormwater runoff. “Construct or modify” does not include installation or maintenance of a driveway culvert installed as part of a single-family residential building permit; provided, that such driveway culvert is located within City right-of-way. (Ord. 13-09 § 2 (Exh. 1))

13.05.060 Conveyance system.

“Conveyance system” means the drainage facilities and features, both natural and constructed, that collect, contain and provide for the flow of surface and stormwater from the highest points on the land down to receiving water. The natural elements of the conveyance system include swales and small drainage courses, streams, lakes and wetlands. The constructed elements of the conveyance system include gutters, ditches, pipes, channels, manholes, catchbasins, and flow control and water quality treatment facilities. (Ord. 13-09 § 2 (Exh. 1))

13.05.065 County sewerage system.

“County sewerage system” means any sewerage system consisting of sewerage facilities owned and/or operated by the County or utility district within the jurisdictional boundaries of the City of Covington. (Ord. 13-09 § 2 (Exh. 1))

13.05.070 Department.

“Department” means either the Department of Community Development or the Department of Public Works, as specified herein. (Ord. 13-09 § 2 (Exh. 1))

13.05.075 Design standards.

“Design standards” means the City of Covington Design and Construction Standards, and any subsequent amendments thereto. (Ord. 13-09 § 2 (Exh. 1))

13.05.080 Developed parcel.

“Developed parcel” means any parcel altered from the natural state by the construction, creation, or addition of impervious surfaces. (Ord. 13-09 § 2 (Exh. 1))

13.05.085 Development.

“Development” means any activity that requires a permit or approval, including, but not limited to, a building permit, grading permit, shoreline substantial development permit, conditional use permit, special use permit, zoning variance or reclassification, subdivision, short subdivision, urban planned development, binding site plan, site development permit or right-of-way use permit. (Ord. 13-09 § 2 (Exh. 1))

13.05.090 Director.

“Director” means either the Director of Community Development or the Director of Public Works, or his or her designee, as specified herein. (Ord. 13-09 § 2 (Exh. 1))

13.05.095 Director of Public Health.

“Director of Public Health” means the Director of the King County Department of Public Health, or his or her authorized designee. (Ord. 13-09 § 2 (Exh. 1))

13.05.100 Discharge.

“Discharge” means to throw, drain, release, dump, spill, empty, emit or pour forth any matter, or cause or allow any matter to flow, run, or seep from land or be thrown, drained, released, dumped, spilled, emptied, emitted, or poured into any system regulated under this title. (Ord. 13-09 § 2 (Exh. 1))

13.05.105 Drainage.

“Drainage” means the collection, conveyance, containment or discharge, or any combination thereof, of surface and stormwater runoff. (Ord. 13-09 § 2 (Exh. 1))

13.05.110 Drainage basin.

“Drainage basin” means a geographic and hydrologic subunit of a watershed. (Ord. 13-09 § 2 (Exh. 1))

13.05.115 Drainage facility.

“Drainage facility” means a constructed or engineered feature that collects, conveys, stores or treats surface and stormwater runoff. Such facilities include, but are not limited to, a constructed or engineered stream, pipeline, channel, ditch, gutter, lake, wetland, closed depression, flow control or water quality treatment facility, erosion and sediment control facility or other structures or appurtenances that provide for drainage. (Ord. 13-09 § 2 (Exh. 1))

13.05.120 Drainage report.

“Drainage report” or “stormwater site plan” means the comprehensive report containing all of the technical information and analysis necessary for the City to evaluate a proposed new development or redevelopment project for compliance with the minimum requirements. (Ord. 13-09 § 2 (Exh. 1))

13.05.125 Drainage review.

“Drainage review” means an evaluation by the City of a proposed project’s compliance with the drainage requirements in the stormwater manuals. (Ord. 13-09 § 2 (Exh. 1))

13.05.130 Erosion and sediment control.

“Erosion and sediment control” means any temporary or permanent measures taken to reduce erosion, control siltation and sedimentation and ensure that sediment-laden water does not leave the site or enter into wetlands or aquatic areas. (Ord. 13-09 § 2 (Exh. 1))

13.05.135 Farm management plan.

“Farm management plan” means a comprehensive site-specific plan developed by a farm owner in cooperation with the King County Conservation District, taking into consideration the land owner’s objectives while protecting water quality and related natural resources. (Ord. 13-09 § 2 (Exh. 1))

13.05.140 Financial guarantee.

“Financial guarantee” means a form of financial security posted to do one or more of the following: ensure timely and proper completion of improvements; ensure compliance with the City of Covington Municipal Code; or provide secured warranty of materials, workmanship of improvements and design. Financial guarantees include assignments of funds, cash deposit, surety bonds or other forms of financial security acceptable to the Director of the Department of Community Development or the Director of the Department of Public Works. Performance guarantees, maintenance guarantees and defect guarantees are considered subcategories of financial guarantees. (Ord. 13-09 § 2 (Exh. 1))

13.05.145 Flood hazard reduction plan.

“Flood hazard reduction plan” means a plan and all implementing programs, regulations and procedures including, but not limited to, capital projects, public education activities and enforcement programs for reduction of flood hazards and prepared in accordance with RCW 86.12.200. (Ord. 13-09 § 2 (Exh. 1))

13.05.150 Flow control best management practice.

“Flow control best management practice” means a method or design for dispersing, infiltrating or otherwise reducing or preventing development-related increases in surface or stormwater runoff at, or near, the sources of those increases, including those methods and designs specified in the stormwater manuals. (Ord. 13-09 § 2 (Exh. 1))

13.05.155 Flow control facility.

“Flow control facility” means a drainage facility designed to mitigate the impacts of increased surface and stormwater runoff generated by site development in accordance with the drainage requirements in this title. A flow control facility is designed either to hold water for a considerable length of time and then release it by evaporation, plant transpiration or infiltration into the ground or to hold runoff for a short period of time and then release it to the conveyance system. (Ord. 13-09 § 2 (Exh. 1))

13.05.160 Forest practices.

“Forest practices” means any activity conducted on or directly pertaining to forest land and relating to growing, harvesting, or processing timber, as defined in Chapter 222-16 WAC. (Ord. 13-09 § 2 (Exh. 1))

13.05.165 Fully dispersed runoff.

“Fully dispersed runoff” means runoff from an impervious surface that is dispersed, as specified in the stormwater manuals, through at least 100 feet of native vegetated surface on a slope of 15 percent or less before leaving the site or entering an existing on-site drainage feature, such as a pipe, ditch, stream, river, pond, lake or wetland, if:

(1) The amount of impervious surface being fully dispersed does not exceed 15 percent of the area of native vegetated surface, excluding areas of native vegetated surface occupied by and within 50 feet of a septic drain field and drain field reserve area; and

(2) The Department determines the dispersion of runoff does not create erosion or flooding impacts. (Ord. 13-09 § 2 (Exh. 1))

13.05.170 Groundwater.

“Groundwater” means water in a saturated zone or stratum beneath the surface of the land or below a surface water body. (Ord. 13-09 § 2 (Exh. 1))

13.05.175 Group A water system.

“Group A water system” means a public water system with 15 or more service connections, regardless of the number of people served, or a system serving an average of 25 or more people per day for 60 or more days within a calendar year, regardless of the number of service connections. (Ord. 13-09 § 2 (Exh. 1))

13.05.180 Group B water system.

“Group B water system” means a public water system which is not a Group A system, with less than 15 service connections and serving an average of less than 25 people for 60 or more days within a calendar year, or any number of people for less than 60 days within a calendar year. (Ord. 13-09 § 2 (Exh. 1))

13.05.185 Hazardous materials.

“Hazardous materials” means 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. (Ord. 13-09 § 2 (Exh. 1))

13.05.190 Hyperchlorinated.

“Hyperchlorinated” means water that contains more than 10 milligrams per liter of chlorine. (Ord. 13-09 § 2 (Exh. 1))

13.05.195 Hydraulically connected.

“Hydraulically connected” means connected through surface flow or water features such as wetlands or lakes.

“Impacting impervious surface” means that portion of the actual impervious surface from which runoff:

(1) Is not fully dispersed:

(2) Is not fully infiltrated according to the infiltration standards in the stormwater manuals; or

(3) Is not managed in an alternative manner approved by the Department that effectively mitigates all of the following downstream hydrologic impacts of the impervious surface; increased runoff peaks; frequencies; volumes and flashiness and decreased groundwater recharge. (Ord. 13-09 § 2 (Exh. 1))

13.05.200 Illicit connection.

“Illicit connection” means any manmade conveyance that is connected to the stormwater system without a permit, excluding roof drains and other similar type connections. Examples include sanitary sewer connections, floor drains, channels, pipelines, conduits, inlets, or outlets that are connected directly to the stormwater system. Illicit connections for discharges to the sanitary sewer system are defined by the sewer district. (Ord. 13-09 § 2 (Exh. 1))

13.05.205 Illicit discharge.

“Illicit discharge” means any direct or indirect nonstormwater discharge to the stormwater drainage system that causes or contributes 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, fuel islands, car washing, and gray water systems. Discharges from fire-fighting activities are not included in this definition. Illicit discharges for the sanitary sewer system are defined by the sewer district. (Ord. 13-09 § 2 (Exh. 1))

13.05.210 Impervious surface.

“Impervious surface” means a hard surface area that: (1) prevents or greatly retards the entry of water into the soil mantle as under natural conditions prior to development; or (2) causes water to run off the surface in greater quantities or at an increased rate of flow from the flow present under natural conditions prior to development. Common impervious surfaces include, but are not limited to, roofs, walkways, patios, driveways, parking lots, storage areas, concrete or asphalt-paved areas, or other surfaces that similarly impede the natural infiltration of surface and stormwater. (Ord. 13-09 § 2 (Exh. 1))

13.05.215 Improvement.

“Improvement” means a permanent, manmade, physical change to land or real property including, but not limited to, buildings, streets, driveways, sidewalks, crosswalks, parking lots, water mains, sanitary and storm sewers, drainage facilities, and landscaping. (Ord. 13-09 § 2 (Exh. 1))

13.05.220 Individual water system.

“Individual water system” means a water system serving only one single-family residence. (Ord. 13-09 § 2 (Exh. 1))

13.05.225 Industrial waste.

“Industrial waste” means any liquid, solid or gaseous substances, or combination thereof, resulting from any process of industry, manufacturing, commercial food processing, business, trade or research, including the development, recovery or processing of natural resources. (Ord. 13-09 § 2 (Exh. 1))

13.05.230 Lake management plan.

“Lake management plan” means a plan describing the lake management recommendations and requirements adopted by public rule for managing water quality within individual lake basins. (Ord. 13-09 § 2 (Exh. 1))

13.05.235 Land-disturbing activity.

“Land-disturbing activity” means an activity that results in a change in the existing soil cover, both vegetative and nonvegetative, or the existing soil topography. Land-disturbing activity includes, but is not limited to, demolition, construction, clearing, grading, filling, excavation and compaction. Land-disturbing activity does not include tilling conducted as part of agricultural practices, landscape maintenance or gardening. (Ord. 13-09 § 2 (Exh. 1))

13.05.240 Low impact development.

“Low impact development” or “LID” means a stormwater management and land development strategy applied at the parcel and subdivision scale that emphasizes conservation and the use of on-site natural features integrated with engineered, small-scale hydrologic controls to more closely mimic predevelopment hydrologic functions. Low impact development shall be in accordance with the standards set forth in the stormwater manuals. (Ord. 13-09 § 2 (Exh. 1))

13.05.245 Low impact stormwater facilities.

“Low impact stormwater facilities” means stormwater facilities approved and constructed in accordance with the stormwater manuals for low impact development projects. (Ord. 13-09 § 2 (Exh. 1))

13.05.250 Maintenance.

“Maintenance” means those usual activities taken to prevent a decline, lapse or cessation in the use of currently serviceable structures, facilities, equipment or systems, if there is no expansion of the structure, facilities, equipment or system and there are no significant hydrologic impacts. Maintenance includes the repair or replacement of nonfunctional facilities or the replacement of existing structures with different types of structures, if the repair or replacement is required by one or more environmental permits or to meet current engineering standards and the functioning characteristics of the original facility or structure are not changed. (Ord. 13-09 § 2 (Exh. 1))

13.05.255 Master drainage plan.

“Master drainage plan” means a comprehensive drainage control plan intended to prevent significant adverse impacts to the natural and constructed drainage system, both on- and off-site. (Ord. 13-09 § 2 (Exh. 1))

13.05.260 Minimum requirements.

“Minimum requirements” means the minimum requirements for stormwater management described in the NPDES Phase II Permit. (Ord. 13-09 § 2 (Exh. 1))

13.05.265 Native vegetated surface.

“Native vegetated surface” means a surface in which the soil conditions, ground cover, and species of vegetation are like those of the original native condition for the site, as more specifically set forth in the stormwater manuals. (Ord. 13-09 § 2 (Exh. 1))

13.05.270 Natural discharge location.

“Natural discharge location” means the location where runoff leaves the project site under existing site conditions as defined in the stormwater manuals. (Ord. 13-09 § 2 (Exh. 1))

13.05.275 New impervious surface.

“New impervious surface” means the creation of a hard or compacted surface such as roofs, pavement, gravel or dirt or the addition of a more compacted surface such as the paving of existing dirt or gravel. (Ord. 13-09 § 2 (Exh. 1))

13.05.280 Nonstormwater discharge.

“Nonstormwater discharge” means any discharge to the storm drain system that is not composed entirely of stormwater. (Ord. 13-09 § 2 (Exh. 1))

13.05.285 NPDES Phase II Permit.

“NPDES Phase II Permit” means the stormwater permit issued by the Washington State Department of Ecology in accordance with the National Pollution Discharge Elimination System as promulgated under the Clean Water Act. (Ord. 13-09 § 2 (Exh. 1))

13.05.290 NRCS.

“NRCS” means the Natural Resource Conservation Service, formerly the Soil Conservation Service. The NRCS is a Federal agency within the United States Department of Agriculture. (Ord. 13-09 § 2 (Exh. 1))

13.05.295 Open space.

“Open space” means a parcel, property, or portion thereof classified for current use taxation under, or for which the development rights have been sold to the City of Covington or King County. This definition includes lands which have been classified as open space, agricultural, or timberlands under criteria contained in the appropriate City or County code or Chapter 84.34 RCW. (Ord. 13-09 § 2 (Exh. 1))

13.05.300 Parcel.

“Parcel” means the smallest separately segregated unit or plot of land having an identified owner, boundaries, and surface area which is documented for property tax purposes and given a tax lot number by the King County Assessor. (Ord. 13-09 § 2 (Exh. 1))

13.05.305 Person.

“Person” means any individual, firm, association, co-partnership, corporation, governmental agency or political subdivision, whether acting by themselves or as a servant, agent or employee. (Ord. 13-09 § 2 (Exh. 1))

13.05.310 Pervious surface.

“Pervious surface” means a native vegetated surface converted to a nonnative pervious surface, including, but not limited to, pasture land, grassland, cultivated land, lawn, landscaping or bare soil or any alteration of existing nonnative pervious surface that results in increased surface and stormwater runoff as defined in the stormwater manuals. (Ord. 13-09 § 2 (Exh. 1))

13.05.315 Pollutant.

“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. (Ord. 13-09 § 2 (Exh. 1))

13.05.320 Pollution-generating impervious surface.

“Pollution-generating impervious surface” means an impervious surface considered to be a significant source of pollutants in surface and stormwater runoff. Pollution-generating impervious surfaces include: (1) those surfaces subject to vehicular use or storage of erodible or leachable materials, wastes, or chemicals and that receive direct rainfall or the run-on or blow-in of rainfall; (2) covered parking areas if runoff from uphill could regularly run through them or if rainfall could regularly blow in and wet the pavement surface; and (3) metal roofs, unless they are treated to prevent leaching. (Ord. 13-09 § 2 (Exh. 1))

13.05.325 Pollution-generating pervious surface.

“Pollution-generating pervious surface” means a nonimpervious surface considered to be a significant source of pollutants in surface and stormwater runoff. Pollution-generating pervious surfaces include surfaces subject to the use of pesticides and fertilizers, to the use or storage of erodible or leachable materials, wastes or chemicals or to the loss of soil. Examples of pollution-generating pervious surfaces include, but are not limited to, the lawn and landscaped areas of residential or commercial sites, golf courses, parks, sports fields, and grassed modular grid pavement installed in compliance with the stormwater manuals. (Ord. 13-09 § 2 (Exh. 1))

13.05.330 Preapplication.

“Preapplication” means the meeting(s) or form(s) used by an applicant for a development permit to present initial project intentions to the Department of Community Development or its successor agency. “Preapplication” does not mean application. (Ord. 13-09 § 2 (Exh. 1))

13.05.335 Premises.

“Premises” means any building, lot, parcel of land, or portion of land, whether improved or unimproved, including adjacent sidewalks and parking strips. (Ord. 13-09 § 2 (Exh. 1))

13.05.340 Project.

“Project” means any proposed action to alter or develop a site that may also require drainage review. (Ord. 13-09 § 2 (Exh. 1))

13.05.345 Project site.

“Project site” means the portion of a site and any off-site areas subject to proposed project activities, alterations and improvements including those required by this title. (Ord. 13-09 § 2 (Exh. 1))

13.05.350 Public sewer.

“Public sewer” means any sewer or appurtenant facility other than a side sewer, either owned or operated by or within the jurisdiction of the City of Covington. (Ord. 13-09 § 2 (Exh. 1))

13.05.355 Public water system.

“Public water system” means any water system except one serving only one single-family residence. (Ord. 13-09 § 2 (Exh. 1))

13.05.360 Rate category.

“Rate category” means the classification given to a parcel in the service area based upon the type of land use on the parcel and the percentage of impervious surface area contained on the parcel. (Ord. 13-09 § 2 (Exh. 1))

13.05.365 Redevelopment project.

“Redevelopment project” means a project that proposes one or more of the following modifications to a site that is already substantially developed (35 percent or more existing impervious surface coverage):

(1) The creation or addition of impervious surfaces;

(2) The expansion of a building footprint or addition or replacement of a structure;

(3) Structural development including construction, installation, or expansion of a building or other structure;

(4) Replacement of impervious surface that is not part of a routine maintenance activity;

(5) Land development activity; or

(6) Improvements to a previously developed site, regardless of existing impervious surface coverage, that cost $100,000 or more. (Ord. 13-09 § 2 (Exh. 1))

13.05.370 Replaced impervious surface.

“Replaced impervious surface” means: (1) for structures, the removal and replacement of any exterior impervious surfaces or foundations; and (2) for other impervious surfaces, the removal down to bare soil or base course and replacement. (Ord. 13-09 § 2 (Exh. 1))

13.05.375 Residence.

“Residence” means a building designed and/or used to house a single family. The definition of “residence” shall include trailers on an individual lot and condominium units. (Ord. 13-09 § 2 (Exh. 1))

13.05.380 Residential customer equivalent.

“Residential customer equivalent (RCE)” means each 900 cubic feet of water used or metered sewage flow shall be considered as one residential customer equivalent. (Ord. 13-09 § 2 (Exh. 1))

13.05.385 Residential parcel.

“Residential parcel” means any parcel, which contains no more than three residences or three residential units, which are within a single structure, and is used primarily for residential purposes. (Ord. 13-09 § 2 (Exh. 1))

13.05.390 Runoff.

“Runoff” means that portion of water originating from rainfall and other precipitation that flows over the surface or just below the surface from where it fell and is found in drainage facilities, rivers, streams, springs, seeps, ponds, lakes and wetlands as well as shallow groundwater. (Ord. 13-09 § 2 (Exh. 1))

13.05.395 Salmon conservation plan.

“Salmon conservation plan” means a plan and all implementing regulations and procedures including, but not limited to, land use management adopted by ordinance, capital projects, public education activities and enforcement programs for conservation and recovery of salmon within a water resource inventory and are designated by the State under WAC 173-500-040. (Ord. 13-09 § 2 (Exh. 1))

13.05.400 Service area.

“Service area” means the incorporated areas of the City of Covington. (Ord. 13-09 § 2 (Exh. 1))

13.05.405 Sewage.

“Sewage” means water-carried waste discharged from the sanitary facilities of buildings occupied or used by people. (Ord. 13-09 § 2 (Exh. 1))

13.05.410 Side sewer.

“Side sewer” means any sewer line used or installed by any person to conduct waste from any property to a public sanitary sewer. (Ord. 13-09 § 2 (Exh. 1))

13.05.415 Site.

“Site” means a single parcel, or two or more contiguous parcels that are under common ownership or documented legal control, used as a single parcel for a proposed project for purposes of applying for authority from the City of Covington to carry out a proposed project. For projects located primarily within dedicated rights-of-way, “site” includes the entire width of right-of-way subject to improvements proposed by the project. (Ord. 13-09 § 2 (Exh. 1))

13.05.420 Source control BMP.

“Source control BMP” means a BMP intended to prevent contaminants from entering surface and stormwater or groundwater including the modification of processes to eliminate the production or use of contaminants. Source control BMPs may be either structural or nonstructural. Structural source control BMPs involve the construction of a physical structure on site or other type of physical modification to a site. An example of a structural source control BMP involves the modification or addition of managerial or behavioral practices. Nonstructural source control BMPs involve the modification of or addition of managerial or behavioral practices. An example of a nonstructural source control BMP is using less toxic alternatives to current products or sweeping parking lots. (Ord. 13-09 § 2 (Exh. 1))

13.05.425 Standard specifications.

“Standard specifications” means the Washington State Department of Transportation Standard Specifications for Road, Bridge, and Municipal Construction, current edition, and any subsequent amendments. (Ord. 13-09 § 2 (Exh. 1))

13.05.430 State waste discharge permit.

“State waste discharge permit” means an authorization, license, or equivalent control document issued by the Washington State Department of Ecology in accordance with Chapter 173-216 WAC. (Ord. 13-09 § 2 (Exh. 1))

13.05.435 Storm drainage system.

“Storm drainage system” means publicly owned 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/or detention facilities, natural and human-made or altered drainage channels, reservoirs, or other drainage structures. (Ord. 13-09 § 2 (Exh. 1))

13.05.440 Stormwater.

“Stormwater” means runoff during and following precipitation and snowmelt events, including surface runoff and drainage. (Ord. 13-09 § 2 (Exh. 1))

13.05.445 Stormwater compliance plan.

“Stormwater compliance plan” means a plan or study and all regulations and procedures that have been adopted by the City to implement the plan or study, including, but not limited to, capital projects, public education activities, and enforcement programs for managing stormwater quantity and quality discharged from the City’s municipal separate storm sewer system in compliance with the NPDES permit program. (Ord. 13-09 § 2 (Exh. 1))

13.05.450 Stormwater management facilities.

“Stormwater management facilities” or “stormwater facilities” means constructed facilities that collect, convey, treat, detain, or retain stormwater. Stormwater management facilities may include such elements as catch basins, manholes, pipes, LID BMPs, detention ponds, retention ponds, or other elements. Stormwater management facilities may be located on private parcels or on public easements or rights-of-way. Stormwater management facilities also include conveyance systems and drainage facilities as defined in this chapter. (Ord. 13-09 § 2 (Exh. 1))

13.05.455 Stormwater manuals.

“Stormwater manuals” means the manuals, regulations, and standards adopted in CMC 13.25.020. (Ord. 13-09 § 2 (Exh. 1))

13.05.460 Stormwater Pollution Prevention Plan (SWPPP).

“Stormwater Pollution Prevention Plan” or “SWPPP” means a document that describes the best management practices and activities to be implemented by the property owner 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. (Ord. 13-09 § 2 (Exh. 1))

13.05.465 Subbasin.

“Subbasin” means a geographic area that drains to a stream or water body named and noted on common maps, and that is contained within a basin of the stream or water body. (Ord. 13-09 § 2 (Exh. 1))

13.05.470 Subsurface fluid distribution system.

“Subsurface fluid distribution system” means an assemblage of perforated pipes, drain tiles, or other similar mechanisms intended to distribute fluids below the surface of the ground. (Ord. 13-09 § 2 (Exh. 1))

13.05.475 Surface and stormwater.

“Surface and stormwater” means water originating from rainfall and/or other precipitation or discharges from seeps or springs that is found on ground surfaces and in drainage facilities, rivers, streams, springs, seeps, ponds, lakes and wetlands as well as shallow groundwater. (Ord. 13-09 § 2 (Exh. 1))

13.05.480 Surface and stormwater management services.

“Surface and stormwater management services” means the services provided by the Public Works Department, including, but not limited to, basin planning, facilities maintenance, regulation, financial administration, public involvement, drainage investigation and enforcement, aquatic resource restoration, surface and stormwater quality and environmental monitoring, natural surface water drainage system planning, intergovernmental relations and facility design and construction. (Ord. 13-09 § 2 (Exh. 1))

13.05.485 Surface and stormwater management system.

“Surface and stormwater management system” means constructed stormwater facilities and any natural surface water drainage features that do any combination of collection, storing, controlling, treating or conveying surface and stormwater. (Ord. 13-09 § 2 (Exh. 1))

13.05.490 Surface water.

“Surface water” means all water naturally open to the atmosphere (rivers, lakes, reservoirs, streams, impoundments, seas, estuaries, etc.) and all springs, wells, or other collectors which are directly influenced by surface water. (Ord. 13-09 § 2 (Exh. 1))

13.05.495 Treatment BMP.

“Treatment BMP” means a BMP intended to remove contaminants once they are already contained in stormwater. Examples of treatment BMPs include but are not limited to oil/water separators, biofiltration swales, and wet settling facilities. (Ord. 13-09 § 2 (Exh. 1))

13.05.500 UIC rule.

“UIC rule” means the underground injection control rule promulgated by the Washington State Department of Ecology under Chapter 173-218 WAC, and any subsequent amendments thereto. (Ord. 13-09 § 2 (Exh. 1))

13.05.505 UIC well.

“UIC well” means one of the following: (1) a bored, drilled or driven shaft, or dug hole whose depth is greater than the largest surface dimension; (2) an improved sinkhole; or (3) a subsurface fluid distribution system. UIC wells must be registered by project owners with the Department of Ecology. (Ord. 13-09 § 2 (Exh. 1))

13.05.510 Undeveloped parcel.

“Undeveloped parcel” means any parcel which has not been altered from its natural state by the construction, creation or addition of impervious surface. (Ord. 13-09 § 2 (Exh. 1))

13.05.515 Variance.

“Variance” means a Department-approved adjustment in the application of the requirements of the stormwater manuals. (Ord. 13-09 § 2 (Exh. 1))

13.05.520 Water quality treatment facility.

“Water quality treatment facility” means a drainage facility designed to reduce pollutants once they are already contained in surface and stormwater runoff. A water quality treatment facility is the structural component of best management practices. When used singly or in combination, a water quality treatment facility reduces the potential for contamination of both surface and groundwater. (Ord. 13-09 § 2 (Exh. 1))

13.05.525 Watershed.

“Watershed” means a geographic region within which water drains into a particular river, stream, or body of water. (Ord. 13-09 § 2 (Exh. 1))