Drain lines from all in-ground swimming pools
in the City shall be connected to storm drains, and filter backwash
lines shall be discharged to the public sanitary sewerage systems
as follows:
A. Sand filter backwash shall be discharged to the public
sanitary sewer.
B. Where required, diatomaceous earth filter backwash
shall be connected to the public sanitary sewer through settling tanks
with four months' storage capacity, which tanks shall be readily accessible
for removing solid waste for disposal. Maintenance of these tanks
shall be the responsibility of the owner, but subject to periodic
inspection by the approving authority or its representative.
All persons discharging wastes into the WPC
system shall be subject to a surcharge, in addition to any other sewer
service charges, if these wastes possess a characteristic in excessive
concentration as determined by the approving authority. A waste characteristic
of excessive concentration shall include but may not be limited to:
A. A five-day, 20° C. biochemical oxygen demand (BOD)
of 200 milligrams per liter or a chemical oxygen demand (COD) of 350
milligrams per liter;
B. A suspended solids content of 200 milligrams per liter;
or
C. A fats, oils and grease concentration in excess of
50 milligrams per liter.
The approving authority shall establish, maintain
and make available to the public a list to specify:
A. All waste characteristics which, in excessive concentration,
are subject to surcharge.
B. A definition for each waste characteristic of the
level of concentration which is excessive.
C. The rate of surcharge for each excessive waste characteristic.
If any waters or wastes are proposed to be discharged
to the WPC system by a customer, which contain the substances or possess
the characteristics enumerated in this article and which exceed the
standards and/or limitations, which create a hazard to life or constitute
a public nuisance or which, in the judgment of the approving authority,
may have a deleterious effect upon the WPC system or the receiving
waters, the approving authority shall require said customer to register
and furnish all information requested by the approving authority concerning
the proposed discharge, operations and processes and require that
said customer obtain all applicable permits for the discharge. The
approval authority shall also have the authority:
A. To reject the waters or wastes.
B. To require pretreatment of the waters or wastes to
an acceptable level prior to discharge.
C. To limit the quantities and rates of discharge of
the waters or wastes.
Prior to discharging any industrial waste to
the WPC system or to a public storm drain or prior to continuing the
discharge of any industrial waste to the WPC system or to a public
storm drain, the owner of the improved property from which such discharge
is proposed to be made shall apply to the City, in writing, for an
industrial waste discharge permit to make such discharge.
Dilution is prohibited as a substitute for treatment
to meet any applicable requirements and/or standards.
Grease, oil and sand interceptors shall be provided
at the expense of the customer when, in the opinion of the approving
authority, they are necessary for the proper handling of liquid wastes
containing grease in excessive amounts or any flammable wastes, sand
or other harmful ingredients, except that such interceptors shall
not be required for private living quarters or dwelling units. All
interceptors shall be of the type and capacity approved by the approving
authority, the City Engineer and the City Plumbing Inspector and shall
be located as to be readily and easily accessible for cleaning and
inspection. The WPC Department reserves the right to periodically
test for the effectiveness of an interceptor by methods hereinafter
described. The WPC Department shall not be liable for the lack of
efficiency of an approved interceptor, and all maintenance costs shall
be borne by the customer.
Where preliminary treatment or flow-equalizing
facilities are provided for any waters or wastes, they shall be maintained
continuously in satisfactory and effective operation by the owner
at his expense.
The owner or owners of any property serviced
by a building sewer carrying industrial wastes as hereinbefore defined
shall install a suitable control vault, together with such necessary
meters and other appurtenances, in the building sewer line to facilitate
observation, proportional sampling and continuous flow measurement
and recording of the wastes. Each vault shall be accessible and safely
located and shall be constructed in accordance with plans approved
by the approving authority. The vault shall be installed by the owner
at his expense and shall be maintained by him so as to be safe and
accessible at all times for public inspection.
When a person discharging less than 10,000 gallons
in a normal working day elects to be relieved of the requirement of
a control vault as specified in this article, he may do so, provided
that:
A. Such wastes meet all other requirements of this chapter,
as determined by the approving authority.
B. All such wastes are discharged through a single standard
sewer manhole before entrance into the public sanitary sewers.
C. Said person agrees to pay a surcharge double or equal
that required in this article and that the strength of waste on which
the surcharge is made will be based on tests made on similar wastes
discharged by other industries of the same type, if such information
is available; if not, by such other methods as the approving authority
may wish to employ. Whatever method is used for finding the strength
of the waste, the determination of the approving authority shall be
binding as a basis for surcharges.
No statement contained in this article shall
be construed as preventing any special agreement or arrangement between
the City and any industrial concern whereby an industrial waste of
unusual strength or character may be accepted by the City for treatment,
subject to proper continuous pretreatment prior to discharge into
the WPC system and/or payment therefor by the industrial concern.
Federal or state pretreatment requirements or standards cannot be
waived.