925.06 RESTRICTIONS ON SANITARY SEWER DISCHARGES.
(a) Prohibited Discharges.
(1) No person shall discharge or cause to be discharged any storm water, surface water, ground, roof runoff, subsurface drainage, cooling water or unpolluted industrial process waters to any sanitary sewer of the City; or permit or allow to be discharged or conveyed to a public sewer any wastewater containing pollutants of such character or quantity that will:
A. Not be susceptible to treatment or interfere with the process or efficiency of the treatment system.
B. Constitute a hazard to human or animal life or to the stream or water course receiving the treatment plant effluent.
C. Violate pretreatment standards.
D. Cause the treatment plant to violate its NPDES permit or applicable receiving water standards.
(2) No person shall discharge or cause to be discharged without prior written approval of the Director of Public Utilities any hazardous waste into the sanitary sewer of the City. A hazardous waste shall be defined by OAC 3745-51-21 to 3745-51-24 inclusive or is a waste listed in OAC 3745-51-31, 3745-51-32, 3745-51-33(E), 3745-51-33(F).
(b) Materials Discharged to Public Sewer Limited.
(1) The following described substances, materials, waters or waste shall be limited in discharges to the Municipal system to concentrations or quantities which will not harm either the sewers, wastewater treatment process or equipment; have an adverse effect on the receiving stream; significantly affect the wastewater sludge in such a manner that might jeopardize or reduce sludge disposal methods; cause violations of the NPDES regulations; otherwise endanger lives, limb, public property; or constitute a nuisance. The Public Utilities Director may set limitations more severe than the limitations established in this section if in his opinion, more severe limitations are necessary to meet the objectives of this chapter. In forming his opinion as to the acceptability, the Public Utilities Director 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 material or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the Public Utilities Director are as follows:
A. Wastewater having a temperature higher than 150 degrees Fahrenheit (65°C) at point of entrance to main sewer. In no case, is heat to be contributed in such quantities that the temperature at the POTW exceeds 104 degrees Fahrenheit (40°C).
B. Wastewater containing more than twenty-five milligrams per liter of petroleum oil, non-biodegradable cutting oils, or products of mineral oil origin.
C. Wastewater from industrial plants containing floatable oils, fat, grease, or which may contain more than 100 mg/1 in any single grab sample of fat, oil or grease (fluorocarbon-113 extraction method).
D. Any garbage that has not been properly shredded. 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.
E. Any waters or wastes containing iron, chromium, copper, zinc, nickel, cadmium, 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 Superintendent for such materials.
F. Any waters or wastes containing odor-producing substances exceeding limits which may be established by the Public Utilities Director.
G. Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Public Utilities Director in compliance with applicable State or federal regulations.
H. Quantities of flow, concentrations or both which constitute a "slug".
I. Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed or which are amenable to treatment only to such degree that the wastewater treatment plant effluent cannot meet the requirements of agencies having jurisdiction over discharge to the receiving waters.
J. 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 structural and treatment processes. The Public Utilities Director shall require all discharges to conform to all NPDES permit requirements and any other specified in State or federal regulations.
K. Any toxic substances in amounts exceeding standards promulgated by the Administrator of the U.S. EPA pursuant to Section 307(a) of the Act, and chemical elements or compounds, phenols or other taste or odor producing substances, or any other substances which are not susceptible to treatment or which may interfere with the biological processes or efficiency of the treatment system or that will pass through the system.
L. Any solid or viscous wastes which will or may cause obstructions to the flow in a sewer or otherwise interfere with the proper operation of the wastewater treatment system. Prohibited materials include, but are not limited to, grease, uncomminuted garbage, animal guts or tissues, paunch manure, bones, hair, hides, or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper, wood, plastic, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil or similar substances.
M. Any liquids, solids or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by the interaction with other substances to cause fire or explosion or be injurious in any other way to the wastewater facilities or to the operation of the system. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the sewer system, be more than five percent (5%) nor any single reading over ten percent (10%) of the lower explosive limit (L.E.L.) of the meter. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides.
N. Any waste which will cause corrosion or deterioration of the treatment system. All wastes discharged to the public sewer system must have a pH value in the range of 5.5 to 9.0 standard units. Prohibited materials include, but are not limited to, acids, sulfides, concentrated chloride and fluoride compounds and substances which will react with water to form acidic products.
O. Any waters or waste containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials at the wastewater treatment plant.
(2) 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 this section, and which in the judgment of the Public Utilities Director may interfere with, pass through, or otherwise be incompatible with the wastewater facilities, processes, equipment or receiving waters, or which otherwise may create a hazard to life or constitute a public nuisance, the Public Utilities Director may:
A. Prohibit discharge of the wastes to the public sewer.
B. Require pretreatment to an acceptable condition for discharge to the public sewers.
C. Require control over the quantities and rates of discharge.
D. Require payment to cover added cost of handling and treating the wastes not covered by existing taxes or sewer charges.
Should the Public Utilities Director require the pretreatment or equalization of any waste flows, the design and installation of the plants and equipment therefor shall be subject to the review and approval of the Public Utilities Director. When considering the above alternatives, the Public Utilities Director shall give consideration to the economic impact of each alternative on the discharger.
(3) The Public Utilities Director may require a user of the public sewer system to provide information needed to determine compliance with this chapter. These requirements may include, but are not limited to:
A. Wastewater discharge peak rate and volume over a specified time period.
B. Chemical analyses ofwastewaters.
C. Information on raw materials, processes and products affecting wastewater volume and quality.
D. Quantity and disposition of specific liquid, sludge, oil, solvent, or other materials important to sewer use control.
E. A plot plan of sewers on the user's property showing sewer and pretreatment facility location.
F. Details of wastewater pretreatment facilities.
G. Details of system to prevent and control the losses of materials through spills to the sewer system.
(c) Industrial Pretreatment Required. All major contributing industrial users of the treatment facilities shall pretreat any pollutant which may interfere with, pass through or otherwise be incompatible with the treatment works. All owner(s) of any source to which pretreatment standards are applicable shall be in compliance with such standards within the shortest reasonable time, but not later than two years from the date of promulgation of such standards for the applicable industrial category. Notwithstanding this permitted schedule, any waste discharge that prevents proper treatment of waste at the Municipal wastewater treatment facility shall be prohibited immediately. All owner(s) of any source to which pretreatment standards are applicable shall submit to the Public Utilities Director semiannual notices regarding specific actions taken to comply with such standards. Such notices shall be submitted on the first day of the months of April and October.
If any major contributing industrial user proposes to pretreat its wastes, the design and installation of the plants and equipment therefor shall be subject to the review and approval of the Public Utilities Director.
(d) Measurement Test and Analyses. All measurements, tests and analyses of the characteristics of water and waste shall be determined in accordance with "Standard Methods for Examination of Water and Wastewater", or other approved standards. Samples shall be taken at a control manhole, if available. In the event no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer system to the point at which the sewer service is connected.
(e) Wastewaters Having High Biochemical Oxygen Demand. The admission into the public sewers of any waters or wastes having a five-day biochemical oxygen demand in excess of normal wastewater shall be subject to the review and approval of the Public Utilities Director. When necessary, in the opinion of the Public Utilities Director, means for such pretreatment as may be needed to control the quantities and rates of discharges or reduce objectionable characteristics or constituents shall be constructed according to plans approved by the Public Utilities Director.
(f) Maintenance of Pre-Treatment Facilities. When pretreatment facilities are provided for any water or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
(g) Control Manhole. When required by the Public Utilities Director, the owner of any property served by a sewer service carrying wastes shall install a suitable control manhole in the sewer service to facilitate observation, sampling and measurement of the wastes. Such manhole, when required, shall be accessible and safely located, and shall be constructed in accordance with plans approved by the Public Utilities Director. 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.
(h) Grease, Sand, and Oil Interceptor. All users who discharge sanitary wastes of a nature which include grease, oils, or heavy non-putrescible materials to the City's sanitary sewer system shall be required to install interceptor(s) to remove such materials from the waste stream. The interceptor shall remain the property and responsibility of the property owner and shall be maintained in a manner which causes it to perform satisfactorily.
(Ord. 25-14. Passed 4-14-14.)