(A) No person(s) shall discharge, or cause to be discharged, any unpolluted waters such as storm water, groundwater, roof runoff, subsurface drainage, sump pumps, basement or yard drain, or cooling water to any sewer, except storm water runoff from limited areas, which storm water may be polluted at times, may be discharged to the sanitary sewer by permission of the Superintendent.
(B) Storm water other than that exempted under division (A) above, and all other unpolluted drainage, shall be discharged to the sewers as are specifically designated storm sewers, to a natural outlet approved by the Superintendent and other regulatory agencies. Unpolluted industrial cooling water or process waters may be discharged, on approval of the Superintendent, to a storm sewer or natural outlet.
(C) No person(s) shall discharge, or cause to be discharged, any of the following described waters 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 substances or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to injure or interfere with any waste treatment process, including but not limited to, causing the town to violate its N.P.D.E.S. permit(s), constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of the wastewater treatment plant;
(3) Any waters or wastes having a pH lower than 6, or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the wastewater works; or
(4) Solid or viscous substances in quantities or of a 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, bones, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, ingrained garbage, whole blood, paunch manure, hair and fleshes, entrails and paper dishes, cups, milk containers, and the like, either whole or ground by garbage grinders.
(D) The following described substances, materials waters, or waste 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 Superintendent may set limitations lower than the limitations established in the regulations below if in his or her opinion that more severe limitations are necessary to meet the above objectives. In forming his or her opinion as to the acceptability, the Superintendent will give consideration to the factors as the quantity of subject waste in relation to flows and velocities in the sewers, the wastewater treatment process employed, capacity of the wastewater treatment plant, degree of tractability of the waste in the wastewater treatment plant, and other pertinent factors. The limitations or restrictions on materials or characteristics of waste or wastewater discharged to the sanitary sewer which shall not be violated without approval of the Superintendent are as follows:
(1) Wastewater having a temperature higher than 150°F (65°C);
(2) Wastewater containing more than 25 milligrams per liter of petroleum oil, nonbiodegradable cutting oils, or product of mineral oil origin;
(3) Wastewater from industrial plants containing FLOAT ABLE oils, fats, or grease;
(4) Any garbage that has not been properly shredded as defined in § 50.20. 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 a degree that any material received in the composite wastewater at the wastewater treatment works exceeds the limits established by the Superintendent for those materials;
(6) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the Superintendent;
(7) Any radioactive wastes or isotopes of the half-life or concentration as may exceed limits established by the Superintendent in compliance with applicable state or federal regulations;
(8) Quantities of flow, concentrations, or both which constitute a slug as defined herein;
(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 the degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters;
(10) Any water or wastes which, by interaction with other water 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 structures and treatment processes;
(11) Any water or wastes subject to the categorical pretreatment standards pursuant to Title 40 C.F.R. part 403;
(12) Any water or wastes exceed the following parameters:
(a) BOD5: 250 mg/1;
(b) SS: 250 mg/1;
(c) Ammonia: 30 mg/l;
(d) Phosphorus: 4 mg/1; and
(e) Fats, wax, grease and oils: 100 mg/l.
(E) (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 division (D) above, and which in the judgment of the Superintendent, 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 Superintendent 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 added cost of handling and treating the wastes not covered by existing sewer charges.
(2) When considering the above alternatives, the Superintendent shall give consideration to the economic impact of each alternative on the discharger. If the Superintendent 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 Superintendent.
(F) (1) Grease, oil, and sand interceptors, separate and distinct from the septic tank component of the building sewer, shall be provided when, in the opinion of the Superintendent, they are necessary for the proper handling of liquid wastes containing FLOAT ABLE grease in excessive amounts, as specified in division (D)(3), or any flammable wastes, sand, or other harmful ingredients; except that the 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. In the maintaining of these interceptors, the owner(s) shall be responsible for the proper removal and disposal by appropriate means of the captured material and shall maintain records of the dates, and means of disposal which are subject to review by the Superintendent. Any removal and hauling of the collected materials not performed by owner(s) personnel must be performed by currently licensed waste disposal firms; and
(2) The Superintendent may determine whether the suitable septic tank required as a component of the building sewer will satisfy the requirements for an interceptor(s).
(G) Where pretreatment or flow-equalizing facilities are provided or required for any waters or wastes, they shall he maintained continuously in satisfactory and effective operation by the owner(s) at his or her expense.
(H) When required by the Superintendent, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable structure together with the necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, and measurement of the wastes. The structure, when required, shall be accessibly and safely located and shall be constructed in accordance with plans approved by the Superintendent. The structure shall be installed by the owner at his or her expense and shall be maintained by him or her so as to be safe and accessible at all times.
(I) The Superintendent may require a user of sewer services to provide information needed to determine compliance with this subchapter. These requirements may include:
(1) Wastewater discharge peak rate and volume over a specified time period;
(2) Chemical analyses of wastewater;
(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; and
(7) Details of systems to prevent and control the losses of materials through spills to the municipal sewers.
(J) All measurements, tests, and analyses of the characteristics of waters and wastes to which reference is made in this ordinance, 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. Sampling methods, location, times, durations, and frequencies are to be determined on an individual basis subject to approval by the Superintendent.
(K) (1) No statement contained in this section shall be construed as preventing any special agreement or arrangement between the town and any user whereby a waste of unusual strength or character may be accepted by the town for treatment.
(2) Any wastes described in division (C)(1) and (2) are precluded from these agreements.
(Ord. 12-1999, passed 9-27-1999)