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For the purpose of this chapter and all of this title, the terms, phrases, words and their derivations have the following definitions. When not inconsistent with the context, words used in the present tense include the future tense, words in the plural number include the singular number, and words in the singular number include the plural number. The word “shall” is always mandatory. The word “may” is permissive. Other definitions contained in Chapter 11.02 BMC, Definitions, and in BMC Title 17, Transportation, shall also apply to this title and chapter, except when inconsistent with a definition herein.

1. “AKART” means all known, available, and reasonable methods of prevention, control, and treatment as established by State Water Pollution Control Act, RCW 90.48.010 and 90.48.520.

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

3. “Bothell Surface Water Design Manual (BSWDM)” means the manual of technical and administrative procedures established by the director which delineates methods to be used, the level of detail of analysis required, and other details for implementation of the provisions of this chapter. This manual is found in Chapter 4 of the Bothell Standards.

4. “Clean Water Act” means the federal Water Pollution Control Act (33 USC Section 1251 et seq.), and any subsequent amendments thereto.

5. “Common areas” means those parcels of land set aside for the use in common by the owners of other lots.

6. “Comprehensive storm and surface water program” means a plan and all implementing regulations and procedures including but not limited to capital projects, public education activities, land use management regulations adopted by ordinance for managing surface and storm water management facilities and features within the city.

7. “Director” means the director of the department of public works of the city of Bothell or the director’s designee.

8. “Drainage basin” means the geographic region within which water drains into a particular aquatic system or other body of water.

9. “Drainage facility” means the system of collecting, conveying, and storing surface and storm water runoff. Drainage facilities shall include but not be limited to all surface and storm water conveyance and containment facilities including streams, pipelines, channels, ditches, swamps, lakes, wetlands, closed depressions, infiltration facilities, retention/detention facilities, erosion/sedimentation control facilities, and other drainage structures and appurtenances, both natural and constructed.

10. “Excavation” means the digging, breaking, or removal of soil or rock.

11. “Grading” means the shaping, excavating, or filling of the ground surface.

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

13. “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.

14. “Hyperchlorinated” means water that contains more than 10 milligrams/liter chlorine.

15. “Illicit discharge” means any direct or indirect non-storm water discharge to the city’s surface and storm water management system, except as expressly allowed by this chapter.

16. “Illicit connection” means any manufactured conveyance that is connected to municipal separate storm sewers, surface waters, or ground waters 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, outfall to, or flow into municipal separate storm sewer system, surface waters, or ground waters.

17. “Low-income elderly” for the purpose of this title shall be the age as established by RCW 74.38.070 as it now exists or may hereafter be amended and shall have an annual income level as established by the very low-income category limit published by the United States Department of Housing and Urban Development for its programs for the Seattle, Bellevue, Everett-PMSA/MSA as the same now exists or may hereafter be amended.

18. “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, manufactured channels, or storm drains):

a. Owned or operated by the city of Bothell;

b. Designed or used for collecting or conveying storm water;

c. Which is not part of a publicly owned treatment works (POTW). “POTW” means any device or system used in treatment of municipal sewage or industrial wastes of a liquid nature which is publicly owned; and

d. Which is not a combined sewer. A “combined sewer” means a system that collects sanitary sewage and storm water in a single sewer system.

19. “National Pollutant Discharge Elimination System (NPDES) storm water 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 USC Section 1342(b)) that authorizes the discharge of pollutants to waters of the United States, whether the permit is applicable on an individual, group, or a general area-wide basis.

20. “Natural surface water drainage system” means such landscape features as rivers, streams, open watercourses that collect, convey, or store surface waters, piped streams, lakes, and wetlands. This system circulates water in a complex hydrological cycle.

21. “Permissible alternative” means alternative methods, procedures or materials which differ from the Bothell Standards and/or development regulations which result in a system function equal to, or better than, the original standard accomplishing the same purpose. Permissible alternatives are characterized as modifications which are in the public interest, are based upon sound engineering judgment, and that meet requirements for safety, function, appearance and maintainability.

22. “Pollutants” in regard to surface and storm water include but are not limited to oils and petroleum products, paints and paint thinners, pesticides, fertilizers, soaps, detergents, washing wastes and any pollutants found on the following lists, as now or hereafter amended, herein adopted as part of this chapter by reference:

a. Discarded Chemicals List of WAC 173-303-9903.

b. Toxic Dangerous Waste List of WAC 173-303-101.

c. Dangerous Waste Sources List of WAC 173-303-9904.

d. Dangerous Waste Constituents List of WAC 173-303-9905.

e. Dangerous Waste Mixtures List of WAC 173-303-084.

f. Persistent Dangerous Waste List of WAC 173-303-10.

23. “Pollution” means such contamination, or other alteration of the physical, chemical, or biological properties, of any waters of the state or surface and ground waters within the jurisdiction of the city of Bothell, including change in temperature, taste, color, turbidity, or odor of the waters, or such discharge of any liquid, gaseous, solid, radioactive or other substance into any waters as will or is likely to create a nuisance or render such waters harmful, detrimental, or injurious to public health, safety, or welfare, or to domestic, commercial, industrial, agricultural, recreational, or other beneficial uses, or to livestock, wild animals, birds, fish, or the most sensitive aquatic life.

24. “Receiving bodies of water” means creeks, streams, rivers, lakes, and other natural surface bodies of water into which storm and surface waters are directed, either naturally or in manufactured ditches or piped systems.

25. “Sewage” means the combination of water-carried wastes from residences, businesses, buildings, institutions and industrial establishments, which wastes contain polluted matter subject to treatment.

26. “Sanitary side sewer” means a conduit extending from the plumbing system of a structure to and connecting with a public sewer system.

27. “Storm and surface water management services” means the services provided by the storm and surface water management utility, including but not limited to basin planning, facilities maintenance, regulation, financial administration, public involvement, drainage investigation and enforcement, restoration and maintenance of aquatic resources, surface and storm water quality and environmental monitoring, natural surface water drainage system planning, intergovernmental relations, and facility design and construction.

28. “Storm water” means that portion of precipitation that does not naturally percolate into the ground or evaporates, but flows via overland flow, interflow, pipes, and other features of a storm water drainage system into a defined surface water body, or a constructed infiltration facility.

29. “Surface and storm water management system” means constructed drainage facilities and any natural surface water drainage features which collect, store, control, treat and/or convey surface and storm water.

30. “Storm drainage side sewer” means a conduit extending from the plumbing system of a structure to and connecting with a public storm drainage system.

31. “Storm drainage system” includes but is not limited to the system of pipes, detention/retention facilities, water quality devices, low impact development features, infiltration systems, any roads with drainage systems, municipal streets, gutters, curbs, inlets, piped storm drains, pumping facilities and ditches that direct storm water from surrounding lands to surface waters.

32. “Storm water 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 storm water, storm water conveyance systems, and/or receiving waters to the maximum extent practicable.

33. “Surface waters” includes lakes, rivers, ponds, streams, inland waters, salt waters, wetlands, other surface waters, and watercourses as well as shallow ground water.

34. “Undeveloped parcel” means any parcel which has not been altered from its natural state by the construction, creation, or addition of impervious surface(s).

35. “Utility” means the Bothell storm and surface water management utility created under the provisions of this title.

36. “Utility permit” means the permit required for the extension of any utility main owned by the city on private property.

37. “Water quality” means the chemical, physical, or biological integrity of surface and ground water as established by the federal Water Pollution Control Act, 33 USC Section 1251 et seq., Section 101. (Ord. 2200 § 2 (Exh. B), 2016; Ord. 2023 § 1 (Exh. A), 2009; Ord. 1832 § 1, 2000; Ord. 1634 § 1, 1996).