Definitions. For the purpose of this chapter, the following
definitions shall apply unless the context clearly indicates or requires
a different meaning.
AVAILABLE SEWER.
Any sewer that can be accessed and sufficient grade exists
to serve the property.
BIOCHEMICAL OXYGEN DEMAND or BOD5.
The quantity of dissolved oxygen utilized in the biochemical
oxidation of organic matter over a period of 5 days at a temperature
of 20TC expressed in terms of mg/l.
BUILDING DRAIN.
The part of the lowest horizontal piping of a building drainage
system which receives the discharge from waste and other drainage
pipes within the building or structure, and conveys the same to the
building sanitary sewer which begins at a point 5 feet outside the
established line of the building structure.
BUILDING SANITARY SEWER.
The part of the horizontal piping of a wastewater drainage
system beginning from any building drain, and conveys wastewater to
a public sewer or other point of disposal.
BUILDING STORM SEWER.
The part of the piping of a storm water drainage system which
begins at the connection to the building storm drain at a point 5
feet outside the established line of the building or structure, and
conveys storm water, surface water, and other unpolluted water to
the public storm sewer, street, or other point of disposal.
CATEGORICAL PRETREATMENT STANDARDS.
National pretreatment standards specifying quantities or
concentrations of pollutants or pollutant properties which may be
discharged or introduced into a public sewerage system by specific
industrial categories.
CHEMICAL OXYGEN DEMAND or COD.
The measure of the organic matter content in wastewater and
which is the oxygen equivalent of the organic matter that can be oxidized
under standard laboratory procedure using a strong chemical oxidizing
agent in an acidic medium.
CITY ENGINEER.
The consulting engineer retained by the city, or his or her
authorized agent.
COLLECTION SYSTEM.
Facilities maintained by the city for collecting, pumping,
conveying, and controlling wastewater.
COMBINED SEWER.
A sewer that is designed as both a sanitary sewer and a storm
sewer.
COMMERCIAL USER.
The occupant or lessee of any premises used for commercial
or business purposes which is not an industrial user as defined in
this chapter.
COMPATIBLE POLLUTANT.
The pollutants of biochemical oxygen demand, suspended solids,
pH, and fecal coliform bacteria, plus additional pollutants which
the city treatment works may be specifically designed to treat.
COMPOSITE SAMPLE.
A series of samples mixed together so as to approximate the
average strength of discharge to the sewer. A COMPOSITE
SAMPLE for 1 day shall consist of a pool of 24 samples,
each taken hourly, unless special conditions warrant otherwise and
the City Engineer designates an alternative acceptable procedure.
CONTROL MANHOLE.
A manhole as required under the provisions of this chapter;
to which wastes produced on premises and discharged into a sanitary
sewer are accessible for testing.
COOLING WATER.
The water discharged from any use to which the only pollutant
added is heat.
DIRECT DISCHARGE.
The discharge of treated or untreated wastewater directly
to the waters of the state.
DOMESTIC SEWAGE.
Wastewater of the type commonly introduced into a treatment
works by residential users.
DRAINAGE WATER.
Storm water, ground water, surface drainage, subsurface drainage,
spring water, well overflow, roof drainage, or other like drainage
other than sewage or industrial wastewater.
EQUIVALENT RESIDENTIAL UNIT or E.R.U.
A volume of wastewater which incurs the same costs for operations
and maintenance as the average volume of domestic waste discharged
from an average residential dwelling unit in the treatment works service
area. For purposes of making this determination the city may utilize
the metered water use records. Where a user believes his or her wastewater
discharge to the treatment works is substantially different than his
or her water consumption, an appropriate adjustment may be made provided
the user demonstrates to the satisfaction of the city the actual wastewater
discharge.
FLOW.
The daily total of wastewater flow from an industrial, commercial,
or domestic user.
GARBAGE.
Solid wastes from the preparation, cooking, and dispensing
of food, and from the handling, storage, and sale of produce.
GRAB SAMPLE.
A wastewater sample which is taken from a waste stream on
a 1-time basis without regard to the flow in the waste stream and
without consideration of time.
INDUSTRIAL WASTEWATER.
Any nondomestic liquid, gaseous substance, or semisolid from
any producing, manufacturing business or trade, or processing operation
of whatever nature (as distinct from sanitary sewage), including holding
tank or septic tank waste.
INDUSTRIAL WASTEWATER DISCHARGE PERMIT.
A permit to discharge industrial wastewaters into the city
sewer system issued under the authority of this chapter and which
prescribes certain discharge requirements and limitations.
MAY.
The act referred to is permissive.
NATURAL OUTLET.
Any outlet into a watercourse, pond, ditch, or other body
of surface or ground water.
OPERATION AND MAINTENANCE.
Activities required to ensure the dependable and economical
function of treatment works.
(a)
OPERATION.
Includes financial and personnel management records, laboratory
control, process control, safety and emergency operation planning,
attorney fees, consultant fees, court costs, and any costs or fees
reasonably associated with any of the above.
(b)
MAINTENANCE.
Preservation of functional integrity and efficiency of equipment
and structures. This includes preventive maintenance, corrective maintenance,
and replacement of equipment.
PERSON.
Any individual, company, enterprise, partnership, corporation,
association, society, or group.
pH.
The logarithm of the reciprocal of the weight of hydrogen
ions in grams per liter of solution.
POLLUTANT.
Any spoil, waste, residue, sewage, garbage, sludge, munitions,
chemicals, biological materials, radioactive materials, heat, rock,
sand, dirt, soil, agricultural, municipal, or industrial material
discharged into water.
POLLUTION.
The degradation of the chemical, physical, biological, or
radiological quality of ground, surface, subsurface, or storm drainage
waters by humans, or the activities thereof.
PRETREATMENT.
The reduction of the amount of pollutants, the elimination
of pollutants, or the alteration of the nature of pollutant properties
in wastewater to a less harmful state prior to or in lieu of discharging
or otherwise introducing the pollutants into the city sewerage system.
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.
REPLACEMENT.
Obtaining and installing equipment, accessories, or appurtenances
that are necessary during the design or useful life, whichever is
longer, of the collection and treatment works to maintain the capacity
and performance for which the works were designed and constructed.
RESIDENTIAL USER.
The occupant of a single-family dwelling, or a portion of
a multifamily dwelling.
SANITARY SEWER.
A conduit intended to carry liquid and water-carried wastes
from residences, commercial buildings, industrial plants, and institutions.
SETTLABLE SOLIDS.
Those solids that are capable of being settled in a standard
imhoff cone.
SEWAGE.
A combination of water-carried wastes from residences, commercial
buildings, institutions, and industrial establishments, together with
such ground, surface, and storm waters as may be present.
SEWER.
A pipe or conduit for carrying sewage.
SEWER OPENING.
Includes all lavatories, wash basins, toilets, bathtubs,
showers, sinks, laundry trays, floor drains, and any and all other
fixtures or connections which shall provide an opening for sewage
and waste to be drained into the sewer, but shall not include cleanout
openings which are used solely for maintaining, repairing, or cleaning
the plumbing system.
SEWER USER.
Any person using a city sewer, or who has a residence, multi-family,
or commercial building, institutional building, industrial building,
or other structure containing plumbing, requiring connection to a
sanitary sewer.
SEWERAGE SYSTEM OR WORKS.
The entire sewage collection and treatment system, exclusive
of building sanitary sewers. This includes all conduits, pumps, treatment
equipment, and any other components involved in the collection, transportation,
treatment, and disposal of domestic and industrial wastewater and
sludge.
SHALL.
The act referred to is mandatory.
SIGNIFICANT INDUSTRIAL USER.
Any industrial user of the city POTW who:
(a)
Has a dry weather wastewater discharge which exceeds 25,000
gallons per day;
(b)
Is subject to promulgated National Categorical Pretreatment
Standards;
(c)
Requires pretreatment in order to comply with the discharge
limitations; or
(d)
Is found to have significant impact, either singly or in combination
with other contributing industries, on the collection or treatment
system, the quality of sludge, the system's effluent quality, or air
emissions generated by the system.
SLUG.
Any discharge of water, sewage, or industrial waste which
in concentration of any constituent or in quantity of flow causes
interference to the operation of the POTW.
STORM DRAIN or STORM
SEWER.
The portion of the storm drainage system that is within the
public right-of-way or easement operated and maintained by the city.
This may include but is not limited to pipes, culverts, ditches, waterways,
or any other appurtenances used for the removal or transportation
of rain water or other unpolluted water.
SUPERINTENDENT.
The Public Works Superintendent of the city or his or her
authorized representative.
SUSPENDED SOLIDS.
The total suspended matter that either floats on the surface
or is in suspension in wastewater, and that is removable by laboratory
filtering.
TOXIC POLLUTANT.
Any pollutant or combination of pollutants listed as toxic
in regulations promulgated by the EPA.
UNPOLLUTED WATER.
Water to which no sewage or industrial wastewater has been
added; or water which has been used in such a manner that no pollutants
have been introduced to the flow.
USER.
Every person using any part of the sewage works of the city.
USER CHARGE.
A charge levied on users of a treatment works for the user's
proportionate share of the costs of operation and maintenance (including
replacement) of the works.
WASTEWATER.
Liquid or water-carried pollutants including any ground water,
surface water, and storm water that may be present, whether treated
or untreated, which is contributed into or permitted to enter the
POTW.
WATERCOURSE.
A channel in which a flow of water occurs, either continuously
or intermittently.