No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, cooling water or other unpolluted waters to any sanitary sewer.
Stormwater and all other unpolluted drainage shall be discharged to such storm sewers specifically designated or to a natural outlet approved by the Engineer. Industrial cooling water or unpolluted process water may be discharged, upon approval by the Engineer, to a storm sewer or a natural outlet.
Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following waters or wastes to any public sewer:
A. 
Any liquid or vapor having a temperature higher than 120º F.
B. 
Any water or waste which contains grease or oil or other substance which could solidify or become discernibly viscous at temperatures between 32º F. and 150º F.
C. 
Any water or wastes containing emulsified oil and grease exceeding, on analysis, an average of 50 parts per million of either soluble material.
D. 
Any gasoline, benzine, naphtha, fuel oil, mineral oil or other flammable or explosive liquid, solid or gas.
E. 
Any water or wastes which contain more than two parts per million of the following gases: hydrogen sulfide, sulfur dioxide or oxides of nitrogen.
F. 
Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rubber, rags, feathers, tar, fleshings, entrails, lime slurry, lime residues, beer or distillery slops, chemicals or residues, paint residues, cannery waste bulk solids or any solid or viscous substance capable of causing obstruction to the flow of sewers or other interference with the proper operation of the sewage works.
G. 
Any water or wastes containing phenols in such quantities that the aggregate of contributions throughout the area of service creates treatment difficulties or produces a plant effluent which may be unsatisfactory.
H. 
Any waters or wastes, acid or alkaline in reaction and having corrosive properties capable of causing damage or hazards to structures, equipment or personnel of the sewage works. Free acids and alkali of such wastes must be neutralized at all times within a permissible range of pH between 6.5 and 9.5.
I. 
Toxic or poisonous substances.
(1) 
Any waters or wastes containing a toxic or poisonous substance in sufficient quantity to injure or interfere with any sewage treatment processes, constitute a hazard to humans or animals or create any hazard in the receiving waters, stormwater overflows or the effluent of the sewage treatment plant. Materials such as copper, zinc, chromium and similar toxic substances shall be limited to the following average quantities in the sewage as it arrives at the treatment plant:
Material
Concentration Limit
(parts per million)
Iron (Fe)
0.3
Chromium (Cr)
1.0
Nickel (Ni)
1.0
Copper (Cu)
0.2
Cadmium (Cd)
0.3
Zinc (Zn)
0.3
(2) 
At no time shall the hourly concentration be three times the average concentration, with contributions from individual establishments being subject to control in volume and concentration by the Engineer.
J. 
Any cyanides in excess of two parts per million by weight as CN in the wastes from any outlet into the public sewers.
K. 
Any water or wastes containing the discharge of strong acid, iron pickling wastes or concentrated plating solutions, whether neutralized or not.
L. 
Any waters containing suspended solids of such character and quantity that unusual provision, attention, or expense is required to handle such materials at the sewage treatment plant.
M. 
Any noxious or malodorous gas or substance which, either singly or by interaction with any waste, is capable of creating a hazard or menace to life or property or of preventing entry into sewers for their maintenance and repair.
N. 
Any radioactive substances without a special permit.
O. 
Any waters or wastes that for a duration of 15 minutes have a concentration greater than five times that of normal sewage as measured by suspended solids and BOD.
P. 
Any concentrated dye wastes, spent tanning solutions or other wastes which are highly colored, or wastes which are unusual in BOD or are of unusual volume, concentration of solids or composition, for example:
(1) 
Total suspended solids of inert nature (such as fuller's earth); and/or
(2) 
Total dissolved solids (such as sodium chloride, calcium chloride or sodium sulfate).
Q. 
Any waters or wastes which, by interaction with other water or wastes in the public sewer system, release obnoxious gases or develop color of undesirable intensity or form suspended solids in objectionable concentration or create any other condition deleterious to structures and treatment processes.
Notwithstanding the provisions of § 187-27, any discharge into the public sewer of wastes whose concentration of suspended solids, BOD or grease causes at the sewage works a monthly increase in the average daily analysis of any of these constituents in excess of 2% of the annual daily average for the previous year is prohibited.
Grease, oil and sand interceptors shall be provided when, in the opinion of the Engineer, they are necessary for the proper handling of liquid wastes containing grease in excessive amount or any flammable wastes, sand and 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 Engineer and shall be so located as to be readily and easily accessible for cleaning and inspection. Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, watertight and equipped with removable covers which, when mounted in place, shall be gastight and watertight.
All grease, oil and sand interceptors shall be maintained by the owner at his expense in continuous, efficient operation at all times.
A. 
The admission into the public sewers of any waters or wastes having the following characteristics shall be subject to review and approval by the Engineer:
(1) 
A BOD of more than 240 parts per million.
(2) 
A suspended solids content greater than 300 parts per million.
(3) 
A quantity of substances having the characteristics described in § 187-27.
(4) 
An average flow greater than 10,000 gallons per day and shall be subject to review and approval by the Engineer.
B. 
Where necessary, in the opinion of the Engineer, the owner shall provide, at his expense, such preliminary treatment as may be necessary to:
(1) 
Reduce the BOD to 240 parts per million and the suspended solids to 300 parts per million.
(2) 
Reduce objectionable characteristics or constituents to within the maximum limits which are provided for in § 187-27.
(3) 
Control the quantities and rates of discharge of such waters and wastes.
C. 
Plans, specifications and any other pertinent information related to the proposed preliminary treatment facilities shall be submitted for approval of the Engineer. No construction of such facilities shall be commenced until said approval is obtained in writing.
Where preliminary treatment facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense and shall be subject to periodic inspection by the Engineer. They shall be of the type and capacity approved by the Engineer and must produce an effluent conforming to the provisions of this Part 1 of this chapter. The owner shall maintain operating records and shall submit to the Engineer a monthly summary report of the character of the influent and effluent as may be prescribed by the Engineer to show satisfactory performance of the treatment facilities.
Any approval by the Engineer of the type, kind or capacity of an installation shall not relieve the owner from the responsibility of revamping, enlarging or otherwise modifying an installation if it is found inadequate to accomplish the intended purpose.
All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made herein shall be determined in accordance with Standard Methods for the Examination of Water and Waste Water and shall be determined from suitable samples taken at a control manhole provided for herein. In the event that no 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.
When required by the Engineer, the owner of any property served by a building sewer carrying industrial wastes shall install a suitable control manhole in the building sewer to facilitate observations, sampling and measurement of the wastes. Such manhole, when constructed, shall be accessibly located and shall be constructed in accordance with plans approved by the Engineer. 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 Town and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the Town for treatment subject to payment therefor by the industrial concern.