Sec. 26-156. - Prohibited substances generally.


Prohibited at all times. No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:


Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.


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, including but not limited to cyanide.


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.


Solid or viscous substances in quantities or of such size as would be 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.


Harmful substances, as determined by the town administrator. 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 town administrator 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 town administrator will give consideration to such factors as the quantities of subject waste in relation to flows and velocities in the sewers, materials of construction of the sewers or nature of the sewage treatment process, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors. The substances prohibited are:


Any liquid or vapor having a temperature higher than 120 degrees Fahrenheit (65 degrees Celsius).


Any waters or wastes containing fats, wax, grease, or oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperature between 32 and 120 degrees Fahrenheit (zero and 65 degrees Celsius).


Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of three-fourths horsepower (0.76 metric) or greater shall be subject to the review and approval of the town administrator.


Any waters or wastes containing strong acid, iron pickling wastes, or concentrated plating solutions, whether neutralized or not.


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 town administrator for such materials.


Any waters or wastes containing phenols or other taste or odor producing substances, in such concentrations exceeding limits which may be established by the town administrator 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.


Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the town administrator in compliance with applicable state or federal regulations.


Any waters or wastes having a pH in excess of 9.5.


Materials which exert or cause:


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).


Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).


Unusual BOD, BOD5 in excess of 500 mg/l, total Kjeldahl nitrogen in excess of 13 ppm, chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works.


Unusual volume of flow or concentration of wastes constituting "slugs" as defined in this article.


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.


Remedies by town administrator. If any waters or wastes are discharged or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in subsection (b), and which in the judgment of the town administrator may have a deleterious effect upon the sewage works, processes, equipment, or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the town administrator may:


Reject the wastes;


Require pretreatment to an acceptable condition for discharge to the public sewers;


Require control over the quantities and rates of discharge; and/or


Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions of section 26-161

If the town administrator permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the town administrator and subject to the requirements for major contributing industry in accordance with federal regulation 40 CFR 128, and the national pollutant discharge elimination system article, and allocated for discharging by this article.

(Ord. of 3-13-86, art. V, §§ 3—5)

Sec. 26-157. - Grease, oil and sand interceptors.

Grease, oil, and sand interceptors shall be provided when, in the opinion of the town administrator, 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 town administrator, and shall be located as to be readily and easily accessible for cleaning and inspection.

(Ord. of 3-13-86, art. V, § 6)

Sec. 26-158. - Preliminary treatment and flow equalizing facilities to be maintained by owner.

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.

(Ord. of 3-13-86, art. V, § 7)

Sec. 26-159. - Control manholes.

When required by the town administrator, 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 observation, 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 town administrator. 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.

(Ord. of 3-13-86, art. V, § 8)

Sec. 26-160. - Measurements, tests and analyses of wastewater characteristics.

All measurements, tests, and analyses of the characteristics of waters and wastes to which reference is made in this article 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 such control manhole. If 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 methods to reflect the effect of constituents upon the sewage works and to determine the existence of hazards to life, limb, and property. Industries discharging wastes into the public sewer system may properly be required to periodically sample and analyze their wastewaters and submit the results to the town in order to determine whether they are conforming to the standards set by the town administrator. The particular analyses involved will determine whether a 24-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 24-hour composites of all outfalls whereas pH's are determined from periodic grab samples.

(Ord. of 3-13-86, art. V, § 9)

Sec. 26-161. - Special arrangements for acceptance of certain industrial wastes.

No statement contained in this division shall be construed as preventing any special agreements 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.

(Ord. of 3-13-86, art. V, § 10)

Secs. 26-162—26-180. - Reserved.