The Waterloo Sewer Utility shall be managed by the Waterloo
Water and Light Commission under the general direction of the Council.
As used in this article, the following terms shall have the
meaning indicated:
BACKWATER
The unwanted reverse flow of liquids, solids, or gases.
BACKWATER VALVE
A device designed to automatically prevent the reverse flow
of wastewater in a drain system. Usually referred to as a "palmer
valve" designed to protect the entire house drain system.
BASEMENT
That portion of a dwelling below the first floor or ground
floor with its entire floor below grade.
BIOCHEMICAL OXYGEN DEMAND (BOD)
The quantity of oxygen utilized in the biochemical oxidation
of organic matter in five days at 20° C., expressed as milligrams
per liter. Quantitative determination of BOD shall be made in accordance
with procedures set forth in Standard Methods.
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.
BUILDING SEWER
The extension from the building drain to the public sewer
or other place of disposal, also called "house connection" or "lateral."
Except as provided in this article, building sewers shall not be subject
to the jurisdiction of the City and the City shall not be responsible
for the construction and/or maintenance of such sewers.
CATEGORY A
Those sanitary sewer users who discharge normal domestic
strength wastewater with concentrations of BOD no greater than 250
mg/L, suspended solids no greater than 250 mg/L, nitrogen no greater
than 35 mg/L, phosphorous no greater than 7 mg/L, and chloride no
greater than 400 mg/L.
CATEGORY B
Those sanitary sewer users who discharge wastewater with
concentrations in excess of 250 mg/L of BOD, 250 mg/L suspended solids,
35 mg/L nitrogen, 7 mg/L phosphorous, and 400 mg/L chloride. Users
whose wastewater exceeds the concentration for any one of these parameters
shall be in Category B.
CHECK VALVE
A device designed to automatically prevent the reverse flow
of wastewater.
CHLORINE REQUIREMENT
The amount of chlorine, in milligrams per liter, which must
be added to sewage to produce a specified residual chlorine content
in accordance with procedures set forth in Standard Methods.
CLEAR (UNPOLLUTED) WATER
Water having no impurities, or where impurities are below
a minimum concentration considered harmful by the Wisconsin Department
of Natural Resources and would not be benefited by discharge to the
wastewater treatment facilities provided. Sources of clear water include
inflow and infiltration.
COMPATIBLE POLLUTANT
Biochemical oxygen demand, suspended solids, pH, or fecal
coliform bacteria plus additional pollutants identified in the NPDES
permit for the publicly owned treatment works receiving the pollutants
if such works were designed to treat such additional pollutants and,
in part, do remove such pollutants to a substantial degree.
DEBT SERVICE
A liability for a project incurred in the provision of the
City's wastewater facilities, including general obligations bonds,
revenue bonds, promissory notes, and special assessment bonds with
both principal and interest.
EASEMENT
An acquired legal right for the specific use of land owned
by others.
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. Wastewater shall be considered free of floatable oil if
it is properly pretreated and the wastewater does not interfere with
the collection system.
GARBAGE
The residue from the preparation, cooking, and dispensing
of food and from the handling, storage, and sale of food products
and produce.
GROUND GARBAGE
The residue from the preparation, cooking, and dispensing
of food that has been shredded to such degree that all particles will
be carried freely in suspension under the flow conditions normally
prevailing in public sewers with no particle greater than 1/2 inch
in any dimension.
HOLDING TANK
An approved watertight receptacle for the collection and
holding of sewage.
HOLDING TANK WASTE
The scum, liquid, sludge, or other waste from holding tanks,
such as chemical toilets, campers, trailers, vacuum pump trunks, and
other temporary holding facilities that collect wastewater from a
user. Holding tank waste does not include sludge or waste from a soil
absorption field, septic tank, privy, or grease trap.
INCOMPATIBLE POLLUTANTS
Wastewater with pollutants that will adversely affect the
wastewater treatment facilities or disrupt the quality of wastewater
treatment if discharged to the wastewater treatment facilities.
INDUSTRIAL USER
Any user who discharges more than 25,000 gallons per month
or discharges waste that exceeds normal domestic strength.
INDUSTRIAL WASTE
Any trade or process waste as distinct from segregated domestic
wastes or wastes from sanitary conveniences.
INFILTRATION
The water (other than wastewater) from the ground or other
sources that enters the sewage system through means such as, but not
limited to, defective pipes, pipe joints, connections, and manhole
walls. Infiltration does not include, and is distinguishable from,
inflow.
INFLOW
The water (other than wastewater) that enters the sewage
system from roof leaders, cellar drains, yard drains, area drains,
foundation drains, drains from springs and swampy areas, manhole covers,
cross-connections between storm sewers and sanitary sewers, catch
basins, cooling towers, stormwaters, surface runoff, street wash waters,
or drainage. Inflow does not include, and is distinguishable from,
infiltration.
NATURAL OUTLET
Any outlet, including storm sewers and combined sewer overflows,
into a watercourse, pond, ditch, lake, or other body of surface water
or groundwaters.
NITROGEN
Kjeldahl nitrogen which is the sum of organic nitrogen and
ammonia nitrogen.
NORMAL DOMESTIC STRENGTH WASTEWATER
Wastewater with concentrations of BOD no greater than 250
mg/L, suspended solids no greater than 250 mg/L, nitrogen no greater
than 35 mg/L, phosphorus no greater than 7 mg/L, and chloride no greater
than 400 mg/L.
pH
The logarithm of the reciprocal of the hydrogen-ion concentration.
Neutral water, for example, has a pH value of seven and a hydrogen
concentration of 10-7.
PHOSPHORUS (P)
Total phosphorus in wastewater which may be present in any
of three principal forms: orthophosphates, polyphosphates, and organic
phosphates. Quantitative determination of total phosphorus shall be
made in accordance with procedures set forth in Standard Methods.
PRETREATMENT
The reduction of the amount of pollutants, the elimination
of pollutants, or the alteration of the nature or characteristics
of the pollutant properties of the wastewater of a user prior to or
in lieu of discharge to the sewerage system.
PUBLIC SEWER
Any publicly owned sewer, storm drain, sanitary sewer, or
combined sewer.
REPLACEMENT COSTS
Expenditures for obtaining and installing equipment, accessories,
or appurtenances which are necessary during the useful life of the
wastewater treatment facility to maintain the capacity and performance
for which such facilities were designed and constructed. Operation
and maintenance costs include replacement costs.
SANITARY SEWAGE
A combination of water-carried wastes from residences, business
buildings, institutions, and industrial plants, other than industrial
wastes from such plants, together with such groundwater, surface water,
and stormwater as may be present.
SANITARY SEWER
A sewer that carries sanitary and industrial water-carried
wastes from residences, commercial buildings, industrial plants, and
institutions, together with minor quantities of groundwater, stormwater,
and surface water that are not admitted intentionally.
SEPTAGE
The wastewater or contents of septic tanks, dosing chambers,
grease interceptors, seepage beds, seepage pits, seepage trenches,
and privies.
SEPTIC TANK
A tank which receives and partially treats sewage through
processes of sedimentation, oxidation, flotations, and bacterial action
so as to separate solids from the liquid in the sewage, and discharges
the liquid to a soil absorption system.
SEWAGE
The spent water of a community. The preferred term is "wastewater."
SEWER
A pipe or conduit that carries wastewater or drainage water.
SEWER SERVICE CHARGE
A charge levied on users of the wastewater treatment facilities
for payment of operation and maintenance expenses, debt service costs,
and other expenses or obligations of said facilities.
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 of flows during normal operation and
shall adversely affect the system and/or performance of the wastewater
treatment works.
STANDARD METHODS
The examination and analytical procedures set forth in the
most recent edition of Standard Methods for the Examination of Water
and Wastewater, published jointly by the American Public Health Association,
the American Water Works Association, and the Water Environment Federation.
STORM DRAIN
Sometimes termed "storm sewer," a drain or sewer for conveying
water, groundwater, subsurface water, or unpolluted water from any
source.
SUSPENDED SOLIDS (SS)
Solids that either float on the surface of, or are in suspension
in, water, wastewater, or other liquid and that are removable by laboratory
filtering as prescribed in Standard Methods and are referred to as
"nonfilterable residue."
UNPOLLUTED WATER
Water of quality equal to or better than the effluent criteria
in effect or water that would not cause violation of receiving water
quality standards and would not be benefitted by discharge to the
sanitary sewers and wastewater treatment facilities provided.
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 TREATMENT FACILITY
An arrangement of devices and structures for the storage,
treatment, recycling, and reclamation of wastewater, liquid industrial
wastes, and sludge. These systems include interceptor sewers, outfall
sewers, wastewater collection systems, individual systems, pumping,
power, and other equipment and their appurtenances; any works that
are an integral part of the treatment process or are used for ultimate
disposal of residues from such treatment; or any other method or system
for preventing, abating, reducing, storing, treating, separating,
or disposing of municipal or industrial wastes.