No person shall discharge or cause to be discharged any stormwater,
surface water, groundwater, roof runoff, subsurface drainage, uncontaminated
cooling water or unpolluted industrial process waters to any sanitary
sewer.
Stormwater and all other unpolluted drainage shall be discharged
to such sewers as are specifically designated as storm sewers or to
a natural outlet approved by the Superintendent. Industrial cooling
water or unpolluted process waters may be discharged, upon approval
by the Superintendent, to a storm sewer or natural outlet.
No person shall discharge or cause to be discharged any of the
following described waters or wastes to any public sewers:
A. Any gasoline, benzene, naphtha, fuel, oil or other flammable or explosive
liquid, solid or gas.
B. Any waters or wastes containing toxic or poisonous solids, liquids
or gases in sufficient quantity, either singly or by interaction with
other wastes, to injure or interfere with any sewage treatment process,
constitute a hazard to humans or animals, create a public nuisance
or create any hazard in the receiving waters of the sewage treatment
plant.
C. Any waters or wastes having a pH lower than 5.5 or having any other
corrosive property capable of causing damage or hazard to structures,
equipment and personnel of the sewage works.
D. Solid or viscous substances in quantities or of such size capable
of causing obstruction to the flow in sewers or other interference
with the proper operation of the sewage works, such as, but not limited
to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags,
feathers, tar, plastics, wood, unground garbage, whole blood, paunch
manure, hair and fleshings, entrails and paper dishes, cups, milk
containers, etc., either whole or ground by garbage grinders.
No person shall discharge or cause to be discharged the following
described substances, materials, waters or wastes if it appears likely,
in the opinion of the Superintendent, that such wastes can harm either
the sewers, sewage treatment process or equipment; have an adverse
effect on the receiving stream; or can otherwise endanger life, limb,
public property or constitute a nuisance. In forming his opinion as
to the acceptability of these wastes, the Superintendent will give
consideration to such factors as the quantities of the subject wastes
in relation to flows and velocities in the sewers, materials of construction
of the sewers, nature of the sewage treatment process, capacity of
the sewage treatment plant, degree of treatability of wastes in the
sewage treatment plant and maximum limits established by regulatory
agencies. The substances prohibited are as follows:
A. Any liquid or vapor having a temperature higher than 150° F.
(65° C.).
B. Any waters or wastes containing toxic or poisonous materials; or
oils, whether emulsified or not, in excess of 100 mg/l or containing
substances which may solidify or become viscous at temperatures between
32° F. and 150° F. (0° C. and 65° C.).
C. Any garbage that has not been properly shredded. The installation
and operation of any garbage grinder equipped with a motor of 3/4
(0.76 hp metric) horsepower or greater shall be subject to the review
and approval of the Superintendent.
D. Any waters or wastes containing strong acid, iron pickling wastes
or concentrated plating solutions, whether neutralized or not.
E. Any waters or wastes containing iron, chromium, copper, zinc or similar
objectionable or toxic substances; or wastes exerting an excessive
chlorine requirement, to such degree that any such material received
in the composite sewage at the sewage treatment works exceeds the
limits established by the Superintendent for such materials.
F. Any waters or wastes containing phenols or other taste- or odor-producing
substances in such concentrations exceeding limits which may be established
by the Superintendent, as necessary, after treatment of the composite
sewage, to meet the requirements of the state, federal or other public
agencies of jurisdiction for such discharge to the receiving waters.
G. Any radioactive wastes or isotopes of such half-life or concentration
as may exceed limits established by the Superintendent in compliance
with applicable state or federal regulations.
H. Any waters or wastes having a pH in excess of 9.5.
I. Any mercury or any of its compounds in excess of 0.0005 mg/l as Hg
at any time, except as permitted by the Superintendent in compliance
with applicable state and federal regulations.
J. Any cyanide in excess of 0.025 mg/l at any time, except as permitted
by the Superintendent in compliance with applicable state and federal
regulations.
K. Materials which exert or cause:
(1) Unusual concentrations of inert suspended solids (such as, but not
limited to, Fuller's Earth, lime slurries and lime residues) or of
dissolved solids (such as, but not limited to, sodium chloride and
sodium sulfate);
(2) Excessive discoloration (such as, but not limited to, dye wastes
and vegetable tanning solutions);
(3) Unusual BOD, chemical oxygen demand or chlorine requirements in such
quantities as to constitute a significant load on the sewage treatment
works;
(4) Unusual volume of flow or concentrations of wastes constituting "slugs"
as defined herein.
L. Waters or wastes containing substances which are not amenable to
treatment processes employed or are amenable to treatment only to
such a degree that the sewage treatment plant effluent cannot meet
the requirements to the receiving waters.
Grease, oil and sand interceptors shall be provided when, in
the opinion of the Superintendent, 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 a type and capacity
approved by the Superintendent and shall be located as to be readily
and easily accessible for cleaning and inspection.
Where preliminary treatment or flow-equalizing facilities are
provided, they shall be maintained continuously in satisfactory and
effective operation by the owner at his expense.
Each new industry shall be required to install a control manhole
and, when required by the Superintendent, the owner of any property
serviced by a building sewer carrying industrial wastes shall install
a suitable control manhole together with such necessary meters and
other appurtenances in the building sewer to facilitate observations,
sampling and measurement of the wastes. Such manhole, when required,
shall be accessibly and safely located and shall be constructed in
accordance with plans approved by the Superintendent. The manhole
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.
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 payment therefor by the industrial concern, in accordance with Article
XV of this Part
4.