A. “BOD” means the quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedures during five (5) days at 20° Celsius, usually expressed as a concentration of mg/L.

B. “Building Sewer” means the sewer service line beginning two feet from the edge of the building and ending at the POTW’s sewer main.

C. “Dangerous Waste” is defined in WAC 173-303-040.

D. “Domestic Wastewater” means water that carries human wastes, including toilet, kitchen, bath, and laundry wastes.

E. “FOG” means polar and non-polar fats, oil, and grease that originate from animals, vegetables, petroleum, nonbiodegradable cutting oil, and mineral oil.

F. “Force main” means a sanitary sewer main that is pressurized by a POTW lift station, or a sanitary sewer main that is pressurized by commercial or industrial users.

G. “Garbage" means solid wastes from the preparation, cooking, and dispensing of food, and from the handling, storage, and sale of produce.

H. “Industrial User” means a person that discharges industrial wastewater to the POTW.

I. “Industrial Wastewater” means water or liquid that carries waste from industrial or commercial businesses. Apartment buildings containing three or more dwellings are considered a commercial business.

J. “Interference” means a discharge alone or in conjunction with discharges by other sources that inhibits or disrupts the POTW, or the POTW’s treatment operation, or biosolids processes, or that causes a violation of any requirement of the City’s state waste discharge permit.

K. “Low Pressure Main” means a sanitary sewer main that is not pressurized by a POTW lift station, and receives wastewater from low volume pumping systems.

L. “May” means permissive as allowed by the City Manager, City Council, Municipal Services Director, or the Department of Ecology.

M. “Medical Waste” means isolation wastes, infectious agents, blood, blood products, pathological wastes, sharps, body parts, contaminated bedding, surgical wastes, potentially contaminated laboratory wastes, and dialysis wastes.

N. “Municipal Services Director” is the director who is responsible to the City Manager for management of the Public Works and Engineering Divisions, the supervision of departmental employees, and for the effective administration, construction, and development of public works, engineering, and related public facilities. The Municipal Services Director may designate representatives to assist in the performance of these duties.

O. “Natural Outlet” means any outlet into a watercourse, pond, ditch, lake, or other body of surface water or groundwater.

P. “Owner” means property owner, part owner, joint owner, tenant in common, joint tenant, tenant by the entirety, of the whole, or a part of such building or land.

Q. “Pass Through” means a discharge that exits the POTW into waters of the United States in quantities or concentrations, alone or in conjunction with a discharge or discharges from other sources that create a violation of any requirement of the City’s state waste discharge permit.

R. “Person” means any individual, firm, company, association, society, corporation, or group.

S. “pH” means a measurement of the acidity or alkalinity of a solution, expressed in standard units.

T. “POTW” means the City owned system of gravity mains, force mains, pump stations, and wastewater treatment plants that convey and treat wastewater.

U. “Pretreatment Standards” means general discharge prohibitions, City’s specific limitations on discharge, State standards, or the National Categorical Pretreatment Standards for any specific pollutant, whichever standard is most stringent.

V. “Pretreatment” means the reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in industrial wastewater prior to or in lieu of introducing such pollutants into the POTW. This reduction, elimination, or alteration can be obtained by physical, chemical, or biological processes; by process changes; or by other means. Diluting the concentration of the pollutants is only allowed by an applicable pretreatment standard.

W. “Stormwater” means precipitation, groundwater, surface water, roof runoff, or subsurface drainage.

X. “Shall” means a mandatory requirement.

Y. “Significant Industrial User” means an industrial or commercial user that meets one or more of the following criteria:

Z. "Slug Discharge” means any discharge at a flow rate or concentration that could cause a violation of this chapter, and any discharge not of a routine, regular, or episodic nature.

AA. “Total Dissolved Solids” means the portion of total solid in water or wastewater that passes through a specific filter.

BB. “Total Suspended Solids” means the portion of total solids that are floating or suspended in water, or wastewater; and that are removable by laboratory filtering.

CC. “User” means a person that is responsible for discharging wastewater to the POTW. DD. “Wastewater” means domestic wastewater or industrial wastewater.

EE. “Waste Discharge Permit” means a permit required for every significant industrial user granting the privilege of discharging their industrial wastewater into the POTW. (Ord. 2810, 5/10/16; Ord. 2642, 2/14/12)