A. The “city” shall mean the corporate limits of the city of Gig Harbor, Washington, a municipal corporation created and existing under the laws of the state of Washington.

B. “Developed” shall mean real property that has 600 square feet or more of hard surfaces.

C. “Equivalent billing unit” or “EBU” shall mean 4,400 square feet of hard surface.

D. “Hard surface” shall mean an impermeable surface, a permeable pavement, or a vegetated roof.

E. “Impermeable surface” means a nonvegetated surface which either prevents or retards the entry of water into the soil mantle as under natural conditions prior to development, and/or 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 impermeable surfaces include, but are not limited to, roof tops, walkways, patios, driveways, parking lots or storage areas, concrete or asphalt paving, gravel roads with compacted subgrade, packed earthen materials, and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater. Open, uncovered retention/detention facilities and tidelands shall not be considered as impermeable surfaces for the purposes of determining whether the thresholds for application of stormwater minimum requirements are exceeded but shall be considered impermeable surfaces for purposes of runoff modeling.

F. “Parcel” shall mean each legally defined tract of real property.

G. “Residential” means activity involving the human occupation of a building for living, cooking, sleeping, and recreation.

H. “Single-family dwelling” means a residential structure with one dwelling unit that is constructed on a permanent foundation. Single-family dwellings are detached from other single-family dwellings except that accessory apartments may be attached to a single-family dwelling.

I. “System” shall mean the entire system of stormwater facilities owned by the utility or over which the utility has control or right of use for the movement and retention of storm and surface waters, including both naturally occurring and manmade facilities.

J. “Undeveloped” shall mean real property that is not considered developed.

K. “Utility” shall mean the city stormwater utility, a municipal separate storm sewer system (MS4) as defined by the Western Washington Phase II Municipal Stormwater Permit, which operates and maintains the storm or surface water drains, channels, and facilities, outfalls for storm drainage and the rights and interests in real property related to the system. (Ord. 1482 § 1, 2022).