Unless the context specifically indicates otherwise,
the meaning of the following terms used in this chapter shall be as
follows:
ASTM
American Society for Testing Materials current specifications
and standards.
BOD (denoting "biochemical oxygen demand")
The quantity of oxygen utilized in the biochemical oxidation
of organic matter under standard laboratory procedure in five days
at 20° C., expressed in parts per million by weight.
BUILDING DRAIN
That part of the lowest horizontal piping of a drainage system
which receives the discharge from soil, waste and other drain pipes
inside the walls of the building and conveys it to the building sewer,
beginning approximately five feet 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.
CHLORINE DEMAND
The difference between the amount of chlorine added to water
or wastewater and the amount of residual chlorine remaining at the
end of a specified contact period.
COMPATIBLE POLLUTANT
A substance amenable to treatment in a sewage treatment plant
such as BOD, suspended solids, pH and fecal coliform bacteria, plus
additional pollutants identified in the NPDES permit of the sewage
treatment plant which is designed to treat such pollutants, and in
fact does remove such pollutants to an acceptable degree. These additional
pollutants may include COD, total organic carbon, phosphorus and phosphorus
compounds, nitrogen and nitrogen compounds, fats, oils, and greases
of animal or vegetable origin.
CRITICAL MATERIALS
The organic and inorganic substances, elements or compounds
listed in the register compiled by the MDNR.
DAILY AVERAGE
Shall be based upon a minimum of eight grab samples at one-hour
intervals.
EPA
The United States Environmental Protection Agency.
GARBAGE
Solid wastes from the preparation, cooking, and dispensing
of food, and from the handling, storage, processing and sale of perishable
produce.
INDUSTRIAL COST RECOVERY
A charge imposed on an industrial user to reflect its share
of the amount of grant funds received to construct wastewater treatment
works as provided under United States Public Law 92 to 500 and the
regulations promulgated thereunder.
INDUSTRIAL COST RECOVERY PERIOD
A period of time equal to 30 years or the useful life of
the treatment works as indicated under "industrial cost recovery."
INDUSTRIAL USER
Any nongovernmental or nonresidential user of the wastewater
treatment system, identified in the "Standard Industrial Classification
Manual" (1972 Edition) under Division A, B, D, E or I.
INDUSTRIAL WASTES
The liquid wastes, solids, or semisolids from industrial
processes as distinct from domestic sanitary sewage.
MDNR
The Michigan Department of Natural Resources or any of its
affiliates, including the State Health Department, of the State of
Michigan.
NATURAL OUTLET
Any outlet into a watercourse, canal, waterway, pond, ditch,
lake, or other body of water, either surface or ground water.
NPDES PERMIT
The National Pollution Discharge Elimination System permit.
PERSON
Any individual, firm, company association society, corporation
or group.
pH
The logarithm of the reciprocal of weight of hydrogen ions
in grams per liter of solution.
PRETREATMENT
Treatment given to sewage prior to its discharge, directly
or indirectly, to the WCDC by the user in order to remove illegal
and/or undesirable constituents or to reduce the strength of the waste.
PROPERLY SHREDDED GARBAGE
The wastes from the cooking, preparation and dispensing of
food that has been cut or shredded to such a degree that all particles
will be carried freely under flow conditions normally prevailing in
public sewers, with no particle greater than 1/2 inch in any dimension.
PUBLIC SEWER
A sewer in which all owners of abutting property have equal
rights, and is controlled by public authority.
REPLACEMENT COSTS
The expenditures for obtaining and installing equipment,
accessories or appurtenances during the useful life of the sewage
treatment plant or pumping station necessary to maintain the capacity
and performance for which such works are designed and constructed.
SANITARY SEWAGE
Any liquid wastes discharged from residences, business buildings
and institutions, as distinct from industrial wastes with strengths
not exceeding the following limits: suspended solids: 250 ppm; BOD:
200 ppm; and Phosphorus: 10 ppm.
SANITARY SEWER
A sewer which carries sewage and to which storm, surface
and ground waters (including roof drains and downspouts) are not admitted.
SEWAGE
Any combination of water-carried wastes (including laundry
wastes) from residences, business buildings, institutions and industrial
establishments together with such ground, surface and storm waters
as may be present.
SEWAGE DISPOSAL SYSTEM
Includes all sanitary sewers, combined sanitary and storm
sewers, plants, works, instrumentalities and properties used or useful
in connection with the collection, treatment and/or disposal of sewage
and/or industrial wastes, now in existence or hereafter acquired or
constructed within the corporate limits of the Township of Grosse
Ile.
SEWAGE TREATMENT PLANT
The arrangement of devices and structures used for treating
sewage. The sewage treatment plant serving Grosse Ile Township is
owned, operated, and maintained by the Grosse Ile Sanitary Interceptor
Drain and Treatment Plant Drainage District acting through the Wayne
County Drain Commissioner on behalf of Grosse Ile Township.
SEWER
Any pipe, tile, tube or conduit for carrying sewage.
SEWER SERVICE CHARGES
The charges for sewer system operation, maintenance and replacement
(OM&R), any local capital costs if included, and the industrial
cost recovery charge (ICR).
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 flows during normal operation.
STORM SEWER or STORM DRAIN
A sewer which carries storm and surface waters and drainage
but which excludes sewage and polluted industrial wastes.
SURCHARGE
The additional treatment charges made for the treatment of
wastewater containing pollutants in excessive amounts of those listed
for sanitary sewage.
SUSPENDED SOLIDS
The solids that either float on the surface of, or are suspended
in, water, sewage, or other liquids, and which are removable by laboratory
filtering.
TOWNSHIP BOARD
The duly elected governing body of the Township of Grosse
Ile, Wayne County, Michigan.
USER CHARGES
The charges to recover operation, maintenance and replacement
(OM&R) costs only of the sewage disposal system passed on to the
system users.
WATERCOURSE
A channel, canal or waterway in which a flow of water occurs,
either continuously or intermittently, including the Detroit River,
Lake Erie and the Thorofare Canal.
WCDC
The office of the Wayne County Drain Commissioner acting
through the Drain Commissioner.
WCRC
The office of the Wayne County Road Commission.