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 combined sewers or
storm sewers, or to a natural outlet approved by the Superintendent.
Industrial cooling water or unpolluted process waters may be discharged,
on approval of the Superintendent, to a storm sewer, combined 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 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
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 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 and other pertinent factors. The substances
prohibited are:
A. Any liquid or vapor having a temperature higher than 150° F.
(65° C.).
B. Any water or waste containing fats, wax, grease or oils, whether
emulsified or not, in excess of 100 milligrams per liter 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
horsepower (0.76 horsepower metric) 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 and
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 or 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. 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 concentration of wastes constituting sludge
as defined herein.
J. Waters or wastes containing substances which are not amenable to
treatment or reduction by the sewage treatment processes employed,
or are amenable to treatment only to such degree that the sewage treatment
plant effluent cannot meet the requirements of other agencies having
jurisdiction over discharge 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 for any waters or wastes, they shall be maintained continuously
in satisfactory and effective operation by the owner at his expense.
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 safety 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.
All measurements, tests and analyses of the characteristics
of waters and wastes to which reference is made in this chapter shall
be determined in accordance with the latest edition of Standard Methods
for the Examination of Water and Wastewater, published by the American
Public Health Association, and shall be determined at the control
manhole provided, or upon suitable samples taken at said control manhole.
In the event that no special manhole has been required, the control
manhole shall be considered to be the nearest downstream manhole in
the public sewer to the point at which the building sewer is connected.
Sampling shall be carried out by customarily accepted method to reflect
the effect of constituents upon the sewage works and to determine
the existence of hazards to life, limb and property. The particular
analyses involved will determine whether a twenty-four-hour composite
of all outfalls of a premises is appropriate or whether a grab sample
or samples should be taken. Normally, but not always, BOD and suspended
solids analyses are obtained from twenty-four-hour composites of all
outfalls, whereas pH's are determined from periodic grab samples.
No statement contained in this article shall be construed as
preventing any special agreement or arrangement between the town and
any industrial concern whereby an industrial waste of unusual strength
or character may be exempted by the town for treatment subject to
payment therefor by the industrial concern.