Loading...
DOMESTIC AND INDUSTRIAL WASTEWATER
(A) The city has provided facilities for the collection and treatment of wastewater to promote the health, safety and convenience of its people and for the safeguarding of water resources common to all.
(B) Provision must be made in the design, construction and operation of such facilities to accommodate certain types and quantities of industrial wastes in excess of, and in addition to, normal domestic wastewater.
(C) It is the obligation of the producers of industrial wastes to pay the costs of extra services rendered by the city in an equitable manner.
(D) Proper protection and operation of the collection and treatment facilities may require either the exclusion, pretreatment or controlled discharge at the point of origin of certain types or quantities of industrial wastes.
(E) The infiltration or discharge of storm water into the sanitary sewer system of the city is detrimental to the health, safety, welfare and convenience of the public.
(1992 Code, § 276:00)
For the purpose of this subchapter and Ch. 35 of this code of ordinances, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
APPROVING AUTHORITY. The Council of the City of Owatonna, or its duly authorized board, agent or representative.
BOD. The quantity of oxygen expressed in parts per million by weight, utilized in the biochemical oxidation of organic matter under standard laboratory conditions in five days at a temperature of 20°C. The laboratory determination shall be made in accordance with procedures set forth in Standard Methods.
BUILDING DRAIN. The part of the lowest horizontal piping of a drainage system which receives the discharge from soil, waste and other drainage pipes inside the walls of the building and conveys it to the building sewer, beginning three feet outside the inner face of the building wall.
BUILDING SEWER. The extension from the building drain to the sewer or other place of deposit.
CAPITAL COST. The total cost incurred in the construction of wastewater treatment facilities, consisting of, but not limited to, the sums spent for the following purposes:
(1) Actual sums paid for construction of wastewater treatment facilities;
(2) Actual engineering fees paid for preliminary engineering studies, plans and specifications, supervision during construction, construction staking, operation and maintenance manuals and initial operator training;
(3) Actual sums paid for soils investigations, wastewater sampling and materials testing required for such construction;
(4) Actual fees and wages paid for legal, administrative and fiscal services required by construction of wastewater treatment facilities; and
(5) Actual interest paid on the total amount financed by debt obligation for construction of wastewater treatment facilities.
CITY. The City of Owatonna, Minnesota, or any authorized person acting in its behalf.
COLLECTION SYSTEM. The system of sewers and appurtenances for the collection, transportation and pumping of domestic wastewater and industrial wastes.
DOMESTIC WASTEWATER. Water-borne wastes normally discharged into the sanitary conveniences of dwellings (including apartment houses and hotels), office building, factories and institutions, free of storm and surface water and industrial wastes.
GARBAGE. Solid wastes and residue from the preparation, cooking and dispensing of food; and from the handling, storage and sale of food products and produce.
INDUSTRIAL SERVICE CHARGE. The charge made to users of the public sewer system whose wastes exceed in strength the concentration values established as representative of normal sewage, or exceed 10,000 gallons in average daily flow.
INDUSTRIAL WASTE. Water-borne solids, liquids or gaseous wastes resulting from and discharged, permitted to flow or escaping from any industrial, manufacturing or food processing operation or process or from the development of any natural resource, or any mixture of these with water or domestic wastewater as distinct from normal domestic wastewater.
NATURAL OUTLET. Any outlet into a watercourse, pond, ditch, lake or other body of surface or ground water.
NORMAL DOMESTIC WASTEWATER. Normal wastewater for the city in which the average concentration of suspended materials and five-day BOD is established at 240 parts per million each, by weight.
OPERATION AND MAINTENANCE COST. Annual expenditures made by the city in the operation and maintenance of its wastewater treatment facilities, consisting of, but not limited to, the sums spent for each and all of the following purposes for the 12-month period of record prior to computing the industrial service charge:
(1) Wages and salaries of all operating, maintenance, administrative and supervisory personnel, together with all premiums paid on such wages and salaries (state worker’s compensation coverage, for example);
(2) Actual sums paid for electricity for light and power used for wastewater collection and treatment facilities;
(3) Actual sums paid for chemicals, fuel and other operating supplies;
(4) Actual sums paid for repairs to and maintenance of wastewater treatment facilities and the equipment associated therewith;
(5) Actual sums paid as premiums for hazard insurance carried on sewerage works;
(6) Actual sums paid as premiums for insurance providing coverage against liability imposed by law for the injury to persons and/or property (including death) of any person or persons resulting from the use and maintenance of said sewerage works; and
(7) Actual sums paid for replacement of equipment within the useful life of the wastewater treatment facilities, for example the cost to replace an electric motor or pump that fails, or a broken part in a pump.
PARTS PER MILLION. A weight-to-weight ratio; the parts per million value multiplied by the factor 8.345 shall be equivalent to pounds per million gallons of water. PARTS PER MILLIONS and MILLIGRAMS PER LITER (mg/l) shall be synonymous terms.
PERSON. Any and all persons, natural or artificial, including any individual, firm, company, association, governmental unit or group.
pH. The logarithm (base 10) of the reciprocal of the hydrogen ion concentration expressed in moles per liter. It shall be determined by one of the procedures outlined in Standard Methods.
PROPERLY SHREDDED GARBAGE. The wastes from the preparation, cooking and dispensing of food that have been shredded to such a degree that all particles shall be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one-half inch in any dimension.
PUBLIC SEWER. A sewer in which all owners of abutting properties shall have equal rights and interest controlled by public authority.
SANITARY SEWER. A sewer that conveys wastewater or industrial wastes or a combination of both, and into which storm, surface and ground waters or unpolluted industrial wastes are not intentionally passed.
SEWER. A pipe or conduit for carrying wastewater.
SEWERAGE WORKS. All facilities for collecting, pumping, treating and disposing of wastewater and industrial wastes.
STANDARD METHODS. The examination and analytical procedures set forth in the latest edition at the time of the analysis of Standard Methods for the Examination of Water and Wastewater, as prepared, approved and published jointly by the American Public Health Association, the Water Pollution Control Federation and the American Water Works Association.
STORM SEWER or STORM DRAIN. A sewer that carries storm and surface water and drainage, but excludes wastewater and polluted industrial wastes.
STORM WATER and STORM WATER RUNOFF. The portion of the rainfall that is drained into the storm sewers or storm drains.
SUSPENDED SOLIDS. Solids that either float on the surface of, or are in suspension in water, wastewater or other liquids, and which are removable by a laboratory filtration device. Quantitative determination of SUSPENDED SOLIDS shall be made in accordance with procedures set forth in Standard Methods.
UNPOLLUTED WATER OR WASTE. Water or waste containing none of the following: emulsified grease or oil; acids or alkalis; phenols or other substances imparting taste and odor in receiving water; toxic or poisonous substances in suspension, colloidal state or solution; and noxious or otherwise obnoxious odorous gases. It shall contain not more than five parts per million each of suspended solids and BOD. The color shall not exceed 50 units under procedures set forth in Standard Methods.
WASTEWATER. A combination of the water-borne waste from residences, business buildings, institutions and industrial establishments, together with such ground, surface and storm water as may be present.
WASTEWATER TREATMENT FACILITIES. Any city-owned facilities, devices and structures used for receiving and treating wastewater from the city sanitary sewer system.
WATERCOURSE. A channel in which a flow of water occurs, either continuously or intermittently.
(1992 Code, § 276:03)
(A) Review and acceptance of the approving authority shall be obtained prior to the discharge into the public sewers of any wastes and waters having one or more of the following characteristics:
(1) A five-day, 20°C biochemical oxygen-demand (BOD) greater than 240 ppm;
(2) A suspended solids concentration greater than 240 ppm; and/or
(3) A volume greater than 10,000 gallons per day.
(B) A special agreement or contract for service may be executed when such an agreement is deemed appropriate by either the city or industry requesting service. Such agreements shall be in accordance with all sewer use ordinances and rate structures.
(1992 Code, § 276:06) Penalty, see § 50.99
(A) Where required, in the opinion of the approving authority, to modify or eliminate wastes that are harmful to the structures, processes or operation of the wastewater treatment facilities, the person shall provide, at his or her expense, such preliminary treatment or processing facilities as may be determined necessary to render his or her wastes acceptable for admission to the public sewers.
(B) (1) Where discharge of such wastes to the sanitary sewer are not properly pretreated or otherwise modified, the approving authority may:
(a) Reject the wastes or terminate the service of water and/or sanitary sewer;
(b) Require control of the quantities and rates of discharge of such wastes; or
(c) Require payment of surcharges for excessive cost for treatment; provided, such wastes are amenable to treatment by the normal wastewater treatment facilities operated by the city.
(2) The amount of surcharge shall be computed as twice the actual incremental costs (above normal costs for labor, power, chemicals, equipment rental, mileage and the like) experienced by the city for handling the improperly pretreated wastewater. See §§ 50.28 and 50.29 of this chapter and Ch. 35 of this code of ordinances for method of computing normal industrial waste charges.
(1992 Code, § 276:09)
Grease, oil and sand interceptors shall be provided for the proper handling of liquid wastes containing grease in excessive amount or any flammable wastes, sand and other harmful ingredients; except that, such interceptors shall not be required for private living quarters or dwellings. All interceptors shall be of a type and capacity approved by the approving authority and shall be located as to be readily and easily accessible for easy 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, water-tight and equipped with easily removable covers which, when bolted in place, shall be gas-tight and water-tight. All grease, oil and sand interceptors shall be maintained by the owner, at his or her expense, in continuously efficient operation at all times.
(1992 Code, § 276:12) Penalty, see § 50.99
Plans, specifications and any other pertinent information relating to proposed preliminary treatment or processing facilities shall be submitted for approval by the approving authority prior to the start of their construction, if the effluent from such facilities is to be discharged into the public sewers.
(1992 Code, § 276:15) Penalty, see § 50.99
(A) General.
(1) Prohibited discharges, storm water drainage. No person shall discharge or cause to be discharged any “storm water drainage”, defined as any storm water, ground water or flow from roof runoff, subsurface drainage, down spouts, yard drains, sump pumps, yard fountains, drains, swimming pools, ponds, cistern overflows or lawn sprays into any sanitary sewers.
(2) Unlawful acts. It is unlawful for any person to make or maintain a connection between eaves troughs, rainspouts, footing drains or any other conductor used to carry natural precipitation or ground water, and the sanitary sewer system or any part thereof.
(3) Violation. Any property owner in violation of this section, and upon receiving notice of said violation, shall disconnect the conductor from the sanitary sewer system within the designated time as determined by the city’s prohibited discharges, storm water drainage policy. Any property owner in violation of this section shall be assessed a monthly surcharge, the amount of which will be established by Ch. 35 of this code of ordinances, for each month that the conductor is not permanently disconnected. Failure to permanently disconnect the conductor, or reconnection of a disconnected conductor, may result in the suspension of water and sanitary sewer service.
(4) Unlawful discharge. It is unlawful to discharge storm water or any other prohibited drainage anywhere other than a specifically designed storm sewer or any other specifically designed point approved by the city and/or other regulatory agencies.
(5) Surcharge. Any property found where a reconnection of a disconnected prohibited discharge storm water drainage conductor has occurred shall be assessed a surcharge of $100 per month. The surcharge shall be calculated from the date of the certificate of compliance and remain in effect until disconnection has been reestablished. Failure to permanently disconnect the conductor shall result in the suspension of water and sanitary service.
(1992 Code, § 276:18)
(B) Regulations relative to prohibited discharges.
(1) Except as hereinafter provided, all storm water drainage hereinabove prohibited in division (A) above shall be disconnected by the owner, tenant or occupant, at his, her or their expense, no later than 9-1-1975.
(2) To ensure compliance, the City Council may, by resolution, designate a person or persons who shall be authorized and given authority at any reasonable hour to enter any building or premises for the purpose of inspecting the same to determine whether or not the premises comply with the terms of this subchapter.
(3) Such inspection may be made at any reasonable hour and such inspector may do such acts as may reasonably be necessary to determine the facts with reference to any suspected violation.
(4) The designated inspector shall give written notice to the owner, and the tenant or occupant if rental property, directing him or her to disconnect such prohibited storm water drainage from the sanitary sewer system within such time as may be prescribed in the notice.
(5) If any person fails or refuses to make the disconnection from the sanitary sewer system required by this subchapter, the city may make the necessary corrections and charge the cost thereof to the property owner. Such charges are hereby made a lien upon such premises and shall be certified to the County Auditor as a special assessment and collected with other taxes.
(6) In cases where, and in the opinion of the approving authority, the character of the wastewater from any manufacturer or industrial plant building or other premises is such that it will damage the system or cannot be treated satisfactorily in the system, the approving authority shall have the right to require such user to dispose of such waste otherwise and prevent it from entering the city system.
(7) Any person aggrieved by action of the designated inspector or approving authority under this section may appeal to the Board of Review and Appeals hereunder in accordance with the procedure set forth therein.
(8) All subsurface drainage, footing drains and sump pump discharge shall discharge underground into storm water drainage systems in all newly platted areas that have been accepted after 2-19-1974.
(1992 Code, § 276:21)
(C) Prohibited discharges, specific requirements. No person shall discharge or cause to be discharged either directly or indirectly any of the substances, materials, waters or waste described in this division (C):
(1) Any liquid having a temperature higher than 150°F (65°C); (Exceptions may be granted for short duration flows where it has been shown that the high temperature wastewater would not cause any significant sewerage works problems.)
(2) Any water or wastes which contain wax, grease or oil, plastic or other substances that will solidify or become discernible viscous at temperatures between 32° to 150°F;
(3) Any solids, liquids or gases which, by themselves or by interaction with other substances, may cause fire or explosion hazards, or in any other way may be injurious to persons, property or the operator of the wastewater treatment facilities;
(4) Any solids, slurries or viscous substances of such character as to be capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the wastewater treatment facilities, such as ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, whole blood, paunch manure, hair and fleshings, entrails, lime slurry, lime residues, chemical residues or bulk solids;
(6) Any noxious or malodorous substance which, either singly or by interaction with other substances, is capable of causing objectionable odors, or hazard to life; or forms solids in concentrations exceeding limits established in §§ 50.17 through 50.20 of this chapter or creates any other conditions deleterious to structures or treatment processes; or requires unusual provisions, alteration or expense to handle such materials;
(7) Any waters or wastes having a pH lower than 6.0 or higher than 9.0 or having any corrosive property capable of causing damage or hazards to structures, equipment or personnel (exceptions may be granted for short duration flows where it has been shown that the high or low pH would not cause any significant sewerage works problems);
(8) Any wastes or waters containing suspended or dissolved solids of such character and quantity that unusual attention or expense is required to handle such materials in the wastewater collection and treatment facilities;
(9) Any waters or wastes containing a toxic or poisonous substance such as plating or heat treating wastes in sufficient quantity to injure or interfere with any wastewater treatment process, to constitute a hazard to humans or animals or to create any hazard in the receiving waters of the wastewater treatment facilities;
(10) Any cyanide greater than one part per million, as CN;
(11) Any hexavalent chromium greater than one part per million;
(12) Any trivalent chromium greater than ten parts per million;
(13) Any copper greater than one part per million;
(14) Any nickel greater than one part per million;
(15) Any cadmium greater than one part per million;
(16) Any zinc greater than one part per million;
(17) Any phenols greater than 12 parts per million;
(18) Any iron greater than 12 parts per million;
(19) Any tin greater than one part per million; and/or
(20) Any radioactive wastes greater than allowable releases as specified by current United States Bureau of Standards’ handbooks dealing with the handling and release of radioactive materials.
(1992 Code, § 276:24)
(D) Prohibited discharges, quantity and concentrations. Except in quantities or concentrations, or with provisions as set forth herein, it shall be unlawful for any person, corporation or individual to discharge waters or wastes to the sanitary sewer containing:
(1) Free or emulsified oil and grease exceeding on analysis an average of 100 parts per million (834 pounds per million gallons) of either or both, or combinations of free or emulsified oil and grease, if, in the opinion of the approving authority, it appears probable that such wastes:
(a) Can deposit grease or oil in the sewer lines in such manner as to clog the sewers;
(b) Are not amenable to bacterial action and will therefore pass to the receiving waters without being affected by normal wastewater treatment processes; and
(c) Can have deleterious effects on the treatment process.
(2) Materials which exert or cause:
(a) Unusual concentrations of solids or composition; as for example, in total suspended solids of inert nature (such as fuller’s earth) and/or in total dissolved solids (such as sodium chloride or sodium sulfate);
(b) Excessive discoloration;
(c) Unusual biochemical oxygen demand or an unusual immediate oxygen demand; and/or
(d) High hydrogen sulfide content.
(1992 Code, § 276:27)
(Ord. 1226, passed 4-4-2000) Penalty, see § 50.99
Loading...