(a) No person shall discharge or cause to be discharged any unpolluted water such as stormwater, groundwater, roof runoff, subsurface drainage, or cooling water to any sewer.
(b) No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewer:
(1) Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas.
(2) Any water or waste with a BOD in excess of 240 milligrams per liter, except as provided for herein.
(3) Any water or waste containing suspended solids in excess of 240 milligrams per liter, except as provided for herein.
(4) Any water 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 waste treatment process, constitute a hazard in the receiving waters of the wastewater treatment plan effluent.
(5) Any water or waste having pH lower than 6.5 or greater than 8.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment, or personnel of the wastewater works or the public sewers.
(6) Any solid or viscous substances in quantities or of 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, gravel, ashes, bones, red dog, sand, mud, coal, 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.
(c) The following described substances, materials, waters, or waste shall be limited in discharges to the sewer system, 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 limitations or restrictions on materials or characteristics of waste or wastewater discharged to the sewer system which shall not be exceeded by any person without approval of the Chairman are as follows:
(1) Wastewater having a temperature higher than 40oC.
(2) Wastewater containing more than twenty-five milligrams per liter of petroleum oil, nonbiodegradable cutting oils, or products of mineral oil origin.
(3) Wastewater containing floatable oils, fat, or grease in excess of thirty milligrams per liter.
(4) Any garbage that has not been properly shredded with no particle greater than one-half inch in any dimension. Garbage grinders may be connected to sanitary sewers only from homes, hotels, institutions, restaurants, hospitals, or similar places where garbage originates from the preparation of food in on-site kitchens for the purpose of consumption on the premises.
(5) Any water or waste containing iron, chromium, cooper, zinc, mercury, 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 established by the Chairman for such materials.
(6) Any water or waste containing color-producing or odor-producing substances exceeding limits which may be established by the Chairman.
(7) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Chairman in compliance with applicable state or federal regulations.
(8) Quantities of flow, concentration, or both which constitute a “slug” as defined herein.
(9) Water or waste containing substances such as synthetic detergents 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 water.
(Passed 2-3-86.)
(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.
(Ord. 2006-10. Passed 7-7-06.)
(11) Any substance which will cause the POTW to violate water quality standards or conditions not allowable in State waters.
(12) Any wastewater with objectionable color not removed in the treatment process such as, but not limited to, dye wastes and vegetable tanning solutions.
(Ord. 2006-13. Passed 9-15-06.)
(d) 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 (c)(10) hereof, and which in the judgment of the Wastewater Operator, 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 Wastewater Operator may:
(1) Reject the wastes;
(2) Require pretreatment to an acceptable condition for discharge to the public sewers;
(3) Require control over the quantities and rates of discharge; and/or
(4) Require payment to cover added cost of handling and treating the wastes not covered by existing taxes or sewer charges.
(Ord. 2006-10. Passed 7-7-06.)
(e) Grease, oil and sand interceptors shall be provided when, in the opinion of the Chairman, they are necessary for the proper handling of liquid wastes containing grease in excess of the amount provided in subsection (c) hereof, or any flammable wastes, sand, and other harmful ingredients; except that such interceptors shall not be required for private living quarters for dwelling units. All interceptors shall be of a type and capacity approved by the Chairman, and shall be 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 easily removable covers which when bolted in place shall be gastight and watertight. Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his expense, in continuously efficient operation at all times.
(f) No statement contained in this article shall be construed as preventing any special agreement or arrangement between the Board and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the Board for treatment.
(Passed 2-3-86; A.O.)