Chapter 14. Municipal Utilities
Sec. 14-72. Use of public sewer.
(1) Restricted. No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, uncontaminated cooling water, unpol-luted industrial process waters, cistern overflow or foundation drainage to any sanitary sewer.
(2) Discharge of unpolluted waters. Stormwater and all other unpolluted drainage shall be discharged to sewers specifically designated as storm sewers, or to a natural outlet approved by the engineer. Industrial cooling water or unpolluted process waters may be discharged, on approval of the engineer, to a storm sewer or natural outlet. Such approval is subject to review by the department of natural resources, division of environmental protection.
(3) Other discharges. Other discharges shall be prohibited or restricted as follows:
- Prohibited. Prohibited discharges are the following:
- Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.
- Any waters or wastes 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 wastewater treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of the wastewater treatment plan.
- Any waters or wastes having a pH lower than 5.5 or higher than 9.0 or having any corrosive property capable of causing damage or hazard to structures, equipment and personnel of the wastewater treatment plant.
- Solid or viscous substances in quantities or of such size as are capable of causing obstruction of the flow in sewers or other interference with the proper operation of the wastewater facilities such as, but not limited to, leaves, grass clippings, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, wood, plastics, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, papers dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
- Restricted. No person shall discharge or cause to be discharged the following described substances, materials, waters or wastes if it appears likely in the opinion of the engineer or plant superintendent that such wastes can harm either the sewers, wastewater treatment plant or equipment or have an adverse effect on the receiving stream, or can otherwise endanger life, limb, property or constitute a nuisance. In forming their opinions as to the acceptability of such wastes, the engineer and plant superintendent shall give consideration to the factors of the quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the wastewater treatment process, capacity of the wastewater treatment plant, degree of treatability of wastes in the wastewater treatment plant and other pertinent factors:
- Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit.
- Any water or wastes containing fats, wax, grease, or oils, whether emulsified or not, in excess of 25 mg/l or containing substances which may solidify or become viscous at temperatures between 32 degrees and 150 degrees Fahrenheit.
- Any commercial garbage that has not been properly shredded. The installation and operation of any commercial grinder equipped with a motor of one horsepower or greater shall be subject to the review and approval of the engineer or plant superintendent. A permit shall be obtained from the plumbing inspector prior to the installation of any such commercial garbage grinder unit. The fee for such permit shall be $2.00.
- Any waters or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the wastewater treatment plant exceeds limits established by the engineer or plant superintendent for such materials.
- Any waters or wastes containing odor-producing substances in a concentration that exceeds limits which may be established by the board, or any waters or wastes which release obnoxious gases, form suspended solids which interfere with the collection system or create a condition deleterious to structures and treatment processes.
- Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the engineer or plant superintendent in compliance with state or federal regulations.
- Materials which exert or cause:
- Unusual concentrations of inert suspended solids (such as, but not limited to, fuller's earth, lime slurries and lime residues) or of dissolved solids (such as, but not limited to, sodium sulfate).
- Excessive discoloration such as, but not limited to, dye wastes and vegetable tanning solutions.
- BOD, chemical oxygen demand or chlorine requirements in such quantities as to constitute a significant load on the wastewater treatment plant.
- Unusual volume of flow or concentration of wastes constituting "slugs" as defined in section 14-62.
- 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 the department of natural resources, division of environmental protection.
(4) Industrial discharges. If any waters or wastes are discharged, or proposed to be discharged, to the public sewers, which waters or wastes contain substances or possess the characteristics enumerated in subsection (3) of this section, and which in the judgment of the engineer or plant superintendent may have deleterious effect upon the wastewater facilities, processes, equipment or receiving waters, or which otherwise create a hazard to life, health or constitute a public nuisance, the engineer or plant superintendent may:
- Reject the wastes.
- Require pretreatment to an acceptable condition for discharge to the public sewers.
- Require control over the quantities and rates of discharge.
- Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer service charges under the provisions of section 14-69.
(5) Submission of information. If the engineer permits pretreatment or equalization of waste flows the design and installation of the plant and equipment shall be subject to the requirements of all applicable codes, ordinances and laws, and any other amendments that might be made by Congress or any regulatory changes that might be made by the U.S. Environmental Protection Agency.
(6) Interceptors. Grease, oil and sand interceptors shall be provided when, in the opinion of the engineer or plant superintendent, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts 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 readily and easily accessible for cleaning and inspection.
(7) Preliminary treatment or flow equalization facilities maintenance. Where preliminary treatment or flow equalization facilities are provided for any water or wastes they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
(8) Control manholes. Each person discharging industrial wastes into a public sewer shall construct and maintain one or more control manholes or access points to facilitate observation, measurement and sampling of his wastes, including domestic sewage. Control manholes or access facilities shall be located and built in a manner acceptable to the engineer or plant superintendent. If measuring devices are to be permanently installed they shall be of a type acceptable to the engineer or plant superintendent. Control manholes, access facilities and related equipment shall be installed by the person discharging the waste at his expense and shall be maintained by him so as to be in safe condition, accessible and in proper operating condition at all times. Plans for installation of the control manholes or access facilities and related equipment shall be approved by the engineer or plant superintendent prior to the beginning of construction.
(9) Measurement of flow. The volume of flow used for computing the sewer service charge shall be the metered water consumption of the person as shown in the records of meter readings maintained by the city water department except as noted in subsection (11) of this section.
(10) Provision for deductions. Where unpolluted water can be discharged to a storm sewer or surface drainage and where such discharge can be measured by a water meter, it may be deducted from meter consumption for purposes of sewer service charge billing. Persons requesting such deductions shall be responsible for the furnishing and installation of the necessary meters after approval of plans for each installation by the plumbing inspector.
(11) Metering of waste. Devices for measuring the volume of waste discharged may be required by the engineer or plant superintendent if this volume cannot otherwise be determined from the metered water consumption records. Metering devices for determining the volume of waste shall be installed, owned and maintained by the person. Following approval and installation such meters may not be removed without the consent of the engineer or plant superintendent.
(12) Data required for connections. All industrial users discharging wastes to a public sewer shall prepare and file with the plant superintendent a report that shall include pertinent data relating to the quantity and characteristics of the actual or predicted wastes discharged to the wastewater works on forms supplied by the utility.
(13) Standard examination methods adopted. 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 approved edition of Standard Methods for the Examination of Water and Wastewater published by the American Public Health Association and shall be determined at the control manhole provided, or upon suitable samples taken at such control manhole. If no special manhole has been provided, the control manhole shall be considered to be the nearest downstream manhole and upstream manhole in the public sewer to the point at which the building manhole is connected. Sampling shall be carried out by customarily accepted methods to reflect the effect of constituents upon the sewage works and to determine the existence of hazards to life, limb, health and property. Installation, operation and maintenance of the sampling facilities shall be the responsibility of the person discharging the waste and shall be subject to the approval of the plant superintendent. The utility may also make its own analyses on the wastes and these determinations shall be binding as a basis for sewer user charges.
(14) Pretreatment. Where it is necessary to modify or eliminate wastes that are harmful to the structures, processes or operation of the wastewater treatment works, the person shall provide at his expense such preliminary treatment or processing facilities as may be determined by the board to render his wastes acceptable for admission to the public sewers.
(15) Grease and/or sand interceptors. Grease, oil and sand interceptors shall be provided when, in the opinion of the plumbing inspector, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts, as specified in subsection (b) 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 plumbing inspector and shall be located so as to be readily and easily accessible for cleaning and inspection. In the maintaining of these interceptors the owner 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 for review by the plumbing inspector. Any removal and hauling of the collected materials not performed by owner's personnel must be performed by currently licensed waste disposal firms.
(16) Provisions regarding holding tank and portable toilet wastewater. Holding tanks and portable toilet wastewater are subject to the following:
- Generally. No person owning holding tank pump trucks or other liquid waste transport trucks shall discharge directly or indirectly such sewage into the city's wastewater collection and treatment works unless such person shall first have applied for and received a truck discharge operation permit from the city. All applicants for a truck discharge operation permit shall complete such forms as required by the city, pay appropriate fees, and agree in writing to abide by the provisions of these rules and regulations and any special conditions or regulations established by the city. The owners of such vehicles shall affix and display the permit number on each vehicle used for such purposes. Such permits shall be valid for a period of one year from the date of issuance.
The city shall designate the location and time where such trucks may discharge. The city may refuse to accept any truckload of waste in its absolute discretion when it appears that the waste could have an adverse effect on the wastewater collection and treatment works, the wastewater treatment processes, and/or any sewer or appurtenances.
- Sewer service charges. The wastewater haulers shall pay the city for wastewater treatment and disposal. This charge shall consist of the following:
| ||Effective 01/01/12||Effective 01/01/13|
|Holding tank waste: || || |
|Volume charge||$13.28/100 cu. ft. or |
|$13.65/100 cu. ft. or |
|Portable toilet waste:|| || |
|Volume charge||$37.96/100 cu. ft. or |
|$39.09/100 cu. ft. or |
|Septic tank waste:|| || |
|Volume charge||$80.60/100 cu. ft. or |
|$83.22/100 cu. ft. or |
- Payment. The city shall bill each wastewater hauler for sewer service charges on a monthly basis. Sewer service charges shall be due on the first of the month following the period in which the service is rendered and shall be payable by the 16th of the month at the office of the finance director. Failure to receive a bill shall not exempt or excuse the person from the obligation to pay for the service rendered. Charges levied in accordance with these rules and regulations shall be a debt due to the city and shall be a lien upon the property. If this debt is not paid within 30 days after it shall be due and payable it shall be deemed delinquent and may be recovered by civil action in the name of the city against the wastewater hauler.
Each load logged through the computerized gate report will be billed at a rate of 95 percent of the total tank gallonage volume of that specific vehicle.
In the event a truck tank is replaced, the firm must reestablish a full truck volume amount. The firm must, at its expense, provide the city with a full truck and an empty truck scaled weight to determine the new volume. The weighing procedures shall be conducted as instructed by the city.
- Wastewater analysis. Wastewater haulers shall be required to submit to the city a representative sample of their wastewater upon request by the city.
In addition, wastewater haulers shall perform or shall have performed such additional tests and sampling as may be required by state or federal agencies having jurisdiction, or as deemed necessary by the city because of any suspected problems caused by the holding tank wastewater. The city agrees to be reasonable in requiring such sampling and tests. The expense of any such required sampling or testing shall be the obligation of the wastewater hauler.
- Truck discharge operation permit. In January of each year or prior to initiating any wastewater hauling operations, all private waste haulers will obtain a truck discharge operation permit for each vehicle employed in their business to haul waste. The completed application, along with a permit fee as established by the board of public works and approved by the council, will be filed with the city clerk's office during business hours. All permit holders must have a Wisconsin Department of Natural Resources septic tank cleaner permit. A permit will be issued or denied by the city within ten days of receiving the permit application.
- Prohibited discharges. Wastewater haulers shall not discharge or cause to be discharged, directly or indirectly, sewage continuing industrial discharges or any substance as enumerated in section 14-73 of this Code as amended from time to time or any other substance prohibited by other city ordinances or any applicable state or federal regulation.
- Revocation of permit. The truck discharge operation permit shall be subject to revocation by the city for violation of any provision of these rules and regulations or other regulations established by the city or any local, state or federal agency.
- Public liability insurance. Any wastewater haulers disposing of holding tank sewage shall carry public liability insurance in an amount of not less than $100,000.00 to protect any and all persons or property from injury and/or damage that may result from the transport of the wastewater to the city's wastewater collection and treatment facilities or from the discharge of such wastewater into the city's wastewater collection and treatment facilities.
Any wastewater hauler further shall hold harmless and indemnify the city from any and all liability and claims for damages arising out of or resulting from the transport and/or discharge of holding tank wastewater.
- Discharge procedures. The city will accept discharges from wastewater haulers at the wastewater treatment plant, 3411 South Galvin Avenue. Haulers shall make arrangements for discharge with the wastewater superintendent or his designee.
(Code 1982, § 13.23; Ord. No. 967, § 2, 2-25-2003; Ord. No. 1033, § 2, 10-12-2004; Ord. No. 1060, § 2, 10-11-2005; Ord. No. 1083, § 2, 10-10-2006; Ord. No. 1214, § 1, 10-26-2011; Ord. No. 1237, § 1, 2, 10-23-2012)
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