A. Unpolluted Water; Surface Drainage: No persons shall discharge or cause to be discharged any unpolluted water such as stormwater, surface water, groundwater, roof runoff, subsurface drainage, or cooling water to any sewer, except stormwater runoff from limited areas, which stormwater may be polluted at times, may be discharged to the sanitary sewer by permission of the town.
B. Discharges To Storm Sewers: Stormwater other than that excepted under subsection A of this section 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 town and other regulatory agencies. Unpolluted industrial cooling water or process waters may be discharged, on approval of the town, to a storm sewer or natural outlet.
C. Certain Prohibited Waters And Wastes: No person shall discharge or cause to be discharged any of the following described water or wastes to any public sewers:
1. Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.
2. Any waters containing toxic or poisonous solids, liquids, or gases in sufficient quantity, either singly or by interaction with other wastes, to contaminate the sludge of any municipal system, 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 or have an adverse effect on the waters receiving any discharge from the treatment works.
3. 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 wastewater works.
4. 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 wastewater facilities 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.
D. Substances Limited In Discharges: The following described substances, materials, waters, or wastes shall be limited in discharges to municipal systems to concentrations or quantities which will not harm either the sewers, wastewater treatment process or equipment, will not have an adverse effect on the receiving stream, or will not otherwise endanger lives, limb, public property, or constitute a nuisance. The council may set limitations lower than the limitations established in the regulations below if in their opinion such more severe limitations are necessary to meet the above objectives. In forming their opinion as to the acceptability, the council will give consideration to such factors as the quantity of subject waste in relation to flows and velocities in the sewers, materials of construction of the sewers, the wastewater treatment process employed, capacity of the wastewater treatment plant, degree of treatability of the waste in the wastewater treatment plant, and other pertinent factors. The limitations or restrictions on materials or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the town are as follows:
1. Wastewater having a temperature higher than one hundred fifty degrees Fahrenheit (150°F) (65°C).
2. Wastewater containing more than twenty five milligrams per liter (25 mg/l) of petroleum oil, nonbiodegradable cutting oils, or product of mineral oil origin.
3. Wastewater from industrial plants containing floatable oils, fat or grease.
4. Any garbage that has not been properly shredded (see definition of "properly shredded garbage" in section 9-2-1 of this chapter). Garbage grinders may be connected to sanitary sewers from homes, hotels, institutions, restaurants, hospitals, catering establishments, or similar places where garbage originates from the preparation of food in kitchens for the purpose of consumption on the premises or when served by caterers.
5. Any waters or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances to such degree that any such material received in the composite wastewater at the wastewater treatment works exceeds the limits which may be established by the town for such materials.
6. Any waters or wastes containing odor producing substances exceeding limits which may be established by the town.
7. Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the town in compliance with applicable state or federal regulations.
8. Quantities of flow, concentrations, or both which constitute a "slug" as defined in section 9-2-1 of this chapter.
9. Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amenable to treatment only to such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
10. Any waters or wastes which, by integration with other waters or wastes in the public sewer system, release obnoxious gases, form suspended solids which interfere with the collection system, or create a condition deleterious to structure and treatment processes.
E. Nuisance Conditions; Town Options:
1. 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 D of this section, and which, in the judgment of the town, may have a deleterious effect upon the wastewater facilities, processes, equipment, or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the town may:
a. Reject the wastes;
b. Require pretreatment to an acceptable condition for discharge to the public sewers;
c. Require control over the quantities and rates of discharge; and/or
d. 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 subsection J of this section.
2. When considering this alternative, the town shall give consideration to the economic impact of each alternative on the discharges. If the town 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.
F. Grease, Oil And Sand Interceptors: Grease, oil and sand interceptors shall be provided when, in the opinion of the town, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts as specified in subsection D3 of this section, 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, and shall be located as to be readily and easily accessible for cleaning and inspection. In the maintaining of these interceptors, the owners shall be responsible for the proper removal and disposal by appropriate means of the captivated material and shall maintain records of the dates, and means of disposal which are subject to review by the town. Any removal and hauling of the collected materials not performed by owner's personnel must be performed by currently licensed waste disposal firms.
G. Pretreatment Or Flow Equalizing Facilities: Where pretreatment or flow equalizing facilities are provided or required for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owners at their expense.
H. Industrial Wastes, Structure To Facilitate Observation: When required by the town, the owners of any property serviced by a building sewer carrying industrial wastes shall install a suitable structure together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling and measurement of the wastes. Such structures, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the town. The structure 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.
I. Information Required To Determine Compliance: The town may require a user of sewer services to provide information needed to determine compliance with this chapter. These requirements may include:
1. Wastewaters discharge peak rate and volume over a specified time period.
2. Chemical analysis of wastewaters.
3. Information on raw materials, processes, and products affecting wastewater volume and quality.
4. Quantity and disposition of specific liquid, sludge, oil, solvent, or other materials important to sewer use control.
5. A plot plan of sewers of the user's property showing sewer and pretreatment facility location.
6. Details of wastewater pretreatment facilities.
7. Details of systems to prevent and control the losses of materials through spills to the municipal sewer.
J. Measurements, Tests And Analyses: 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 paid for by the user under the supervision of the superintendent. Sampling methods, location, times, durations, and frequencies are to be determined on an individual basis subject to approval by the town.
K. Special Agreements: No statement contained in this chapter 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.
L. Damaging Wastewater Facilities Or Equipment: No person shall maliciously, wilfully, or negligently break, damage, destroy, uncover, deface, or tamper with any structure, appurtenance or equipment which is a part of the wastewater facilities. Any person violating this provision shall be subject to immediate arrest under charge of disorderly conduct. (1993 Code § 13.12.050)