General
Terms.
As used in this article, the following words and
terms shall have the meanings respectively ascribed to them in this
section:
BOD (Biochemical Oxygen Demand).
The quantity of oxygen utilized in the biochemical oxidation
or organic matter under standard laboratory procedures in five (5)
days at twenty (20) degrees Centigrade, expressed in parts per million
by weight, or milligrams per liter (mg/1).
Conventional Pollutant.
Those pollutants that are generally biodegradable and readily
handled within normal concentration ranges by conventional treatment
processes. Conventional pollutants specifically include biochemical
oxygen demand, total suspended solids, fecal coliform, pH, and oil
and grease.
Domestic Wastewater.
The liquid waste normally originating in quarters inhabited
or frequented by human beings and may include human excreta, bath
water, kitchen wastes (with or without properly shredded garbage)
and laundry waste.
Industrial Users.
Any nongovernmental, nonresidential user of a publicly owned
treatment works which discharges more than the equivalent of twenty-five
thousand (25,000) gallons per day of sanitary wastes as defined in
40 CFR 35.905 of Federal Rules and Regulations.
Nonconventional Pollutants.
All other pollutants which are not specifically identified
as either conventional or toxic and includes such pollutants as chemical
oxygen demand (COD), phosphorus, sulfates, chlorides, etc.
Nonresidential Customers.
All other customers receiving wastewater service and includes,
but is not limited to, commercial establishments, churches, schools,
nursing homes and hospitals.
Normal Wastewater Concentrations.
Wastewater having characteristics generally associated with
typical domestic wastewater and shall have the following limits:
BOD (five (5) days at 20°C), maximum, mg/1
|
250
|
Chlorine demand (fifteen (15) minutes at 68°F), maximum,
mg/1
|
25
|
Suspended solids, maximum, mg/1
|
250
|
Hydrogen ion concentration (pH)
|
5.0 to 9.0
|
Free oil and grease, maximum; mg/1
|
10
|
Grease, total, maximum, mg/1
|
100
|
Temperature, maximum
|
125°F
|
NHS-N, maximum, mg/1
|
30
|
Objectionable Pollutant.
Those toxic and nonconventional pollutants causing an increase
in the cost of managing the effluent or sludge of the treatment waste.
Suggested maximum limits for some objectionable pollutants are defined
in the sewer use ordinance.
pH.
The logarithm of the reciprocal of the weight of hydrogen
ions in moles per liter of solution.
Prohibited Pollutants.
Any toxic or nonconventional pollutants that would cause
problems in the adequate treatment of the wastewater and would be
required to be removed prior to any discharge into the wastewater
system.
Replacement.
Expenditures for obtaining and installing equipment, accessories
or appurtenances which are necessary to maintain the capacity and
performance of the treatment works during its service life.
Sewer Superintendent.
The person duly designated by the governing authority to
oversee and supervise the activities incident to the operation and
maintenance of the sewage works, or his authorized deputy, agency
or representative.
Suspended Solids.
Solids that either float on the surface of or are in suspension
in water, sewage or other liquids and which are removable by laboratory
filtering.
Toxic Pollutants.
Those pollutants which have been designated as toxic under
Section 307 of the 1972 Clean Water Act, including all additions to
the list.
User Charge.
A charge levied on users of a treatment works for the user’s
proportionate share of the cost of operation and maintenance of such
works.