A. 
Unless the context specifically indicates otherwise, the meanings of terms used in this chapter shall be as follows:
BOD (denoting "biochemical oxygen demand")
The quantity of oxygen utilized in the biochemical oxidation of organic matter in five days at 20º C., expressed in milligrams per liter, as determined in accordance with the latest issue of Standard Methods or by a method acceptable to and approved by the State Department of Health and other agencies having jurisdiction.
BUILDING DRAIN
That part of the lowest horizontal piping of a drainage system which receives the discharge from soil, waste and other drainage pipes inside the walls of the building and conveys it to the building sewer, beginning five feet (1.5 meters) outside the inner face of the building wall.
BUILDING SEWER
The extension from the building drain to the public sewer or other place of disposal; also called "house connection."
COMBINED SEWER
A sewer intended to receive both wastewater and storm- or surface water.
DEPARTMENT
The Department of Planning and Public Works of the City of Westminster.
DIRECTOR
The Director of the Public Works or the Director's designee.
[Amended 12-6-2007 by Ord. No. 773]
FLOATABLE OIL
Oil, fat or grease in a physical state such that it will separate by gravity from wastewater by treatment in an approved pretreatment facility. A wastewater shall be considered free of floatable fat if it is properly pretreated and the wastewater does not interfere with the collection system.
GARBAGE
Solid wastes and residue from the preparation, cooking and dispensing of food and from the handling, storage and sale of food products and produce.
HAZARDOUS WASTE
Any waste or combination of waste that poses substantial danger to human beings, plants and animals. Specifically, a waste shall be considered hazardous if it poses one or more of the following characteristics: ignitability, corrosivity, reactivity, toxicity and radioactivity.
INDUSTRIAL WASTES
Waterborne solids, liquids or gaseous wastes resulting from, discharged, permitted to flow or escaping from any industrial, manufacturing or food processing operation or processes or from the development of any natural resource, or any mixture of these with water or domestic sewage as distinct from normal domestic sewage.
INTERFERENCE
(1) 
An inhibition or disruption of the wastewater treatment works or wastewater treatment plant operations or its processes or sludge processes use or disposal which causes either a violation of any requirement of the wastewater treatment works discharge permit or prevents sewage sludge use or disposal by the wastewater treatment works in accordance with any and all applicable statutory provisions and regulations or permits issued under them including:
(a) 
Section 405 of the Clean Water Act.
(b) 
The Solid Waste Disposal Act (SWDA) (including Title II, commonly referred to as the "Resource Conservation and Recovery Act (RCRA)" and any state regulation contained in any state sludge management plan prepared pursuant to Subtitle D of the SWDA.)
(c) 
The Clean Air Act.
(d) 
The Toxic Substances Control Act.
(2) 
Damage to sewer systems and threats to wastewater treatment works' workers and public health, safety and comfort.
LEACHATE
Wastewater produced by the percolation of water through a municipal solid waste landfill.
NATURAL OUTLET
Any outlet, including storm sewers, into a watercourse, pond, ditch, lake or other body of surface or ground water.
PARTS PER MILLION
A weight-to-weight ratio; in wastewater, parts per million value multiplied by the factor of 8.345 shall be equivalent to pounds per million gallons of water; or a weight-to-volume ratio; as one milligram per liter is equal to one part per million in wastewater.
PASS-THROUGH
Discharge of pollutants through the wastewater treatment works into waters of the state in quantities or concentrations which cause a violation of any requirement of the wastewater treatment works discharge permit and/or violation of any other state or federal regulation.
PERSON
Any individual, firm, partnership, company, association, society, corporation, group or entity.
pH
The logarithm of the reciprocal of the hydrogen ion concentration expressed in moles per liter. It shall be determined by one of the procedures outlined in Standard Methods.
PRETREATMENT
Treatment of wastewaters from sources before introduction into the wastewater treatment works.
PROPERLY SHREDDED GARBAGE
The wastes from the preparation, cooking and dispensing of food that have been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than 1/2 inch (1.27 centimeters) in any dimension.
POTW
Publicly owned treatment plant.
PUBLIC SEWER
A common sewer controlled by a governmental agency or public utility.
QUALIFIED ANALYST
(1) 
Any person holding an undergraduate degree in chemistry or in a closely allied field (e.g., biology, sanitary engineering); or
(2) 
Any other person who has demonstrated competency in wastewater analysis by having analyzed satisfactorily a minimum of three reference wastewater samples as supplied upon request by the approving authority.
SANITARY SEWER
A sewer that carries liquid and water-carried wastes from residences, commercial buildings, industrial plants and institutions, together with minor quantities of ground, storm and surface waters that are not admitted intentionally.
SEPTAGE
The liquid and solid material produced in individual on-site wastewater disposal systems, principally septic tanks and cesspools.
SEWER
A pipe or conduit which carries wastewater or drainage water.
SEWERAGE SYSTEM
See "wastewater facilities."
SIGNIFICANT INDUSTRIAL USER
(1) 
Any industrial user who:
(a) 
Is subject to national categorical standards; or
(b) 
Discharges total flows equal to greater than 25,000 gallons per day (gpd); or
(c) 
Contributes a process waste stream that makes up 5% or more of the hydraulic or organic capacity of the POTW; or
(d) 
Is found by the City, state or EPA to have significant impact, either slightly or in combination with other contributing industries, to the POTW, the quality of the sludge, the POTW's effluent quality or air emissions generated by the system.
(2) 
Upon finding an industrial user meeting the above criteria of this definition has no reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement, the City may at any time, on its own initiative or in response to a petition received from an industrial user, and in accordance with 40 CFR 403, determine that such industrial user is not a significant industrial user.
SLUDGE
Solid or semisolid materials removed from the liquid wastewater stream or wastewater or water treatment plant.
SLUG
Any discharge of water or wastewater which in concentration of any given constituent or in quantity of flow exceeds, for any period of duration longer than 15 minutes, more than five times the average twenty-four-hour concentration or flow during normal operation or which shall adversely affect the collection system and/or performance of the wastewater treatment works.
STANDARD METHODS
The examination and analytical procedures set forth in the latest edition of Standard Methods for the Examination of Water and Wastewater, as prepared, approved and published jointly by the American Public Health Association and the American Water Works Association.
STORM DRAIN (sometimes termed "storm sewer")
A sewer or drain for conveying water, groundwater, subsurface water or unpolluted water from any source.
SUSPENDED SOLIDS (SS)
Total suspended matter that either floats on the surface of or is in suspension in water, sewage or other liquids and which is removable by laboratory filtering under standard laboratory procedure as described in Standard Methods.
TOTAL KJEDAHL NITROGEN (TKN)
The sum of free ammonia and organic nitrogen compounds as determined in Standard Methods.
WASTEWATER
The spent water of a community. From the standpoint of source, it may be a combination of the liquid and water-carried wastes from residences, commercial buildings, industrial plants and institutions, together with any groundwater, surface water and stormwater that may be present.
WASTEWATER FACILITIES
The structures, equipment and processes required to collect, carry away and treat domestic and industrial wastes and discharge the effluent and treat, utilize or dispose of sludges resulting from collection and treatment of these wastes.
WASTEWATER TREATMENT WORKS
An arrangement of devices and structures for treating wastewater and sludge.
WATERCOURSE
A natural or artificial channel in which flow of water occurs, either continuously or intermittently.
B. 
The term "shall" is mandatory; "may" is permissive.