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Municipal Code

Chapter 14. Municipal Utilities

Sec. 14-62. Definitions.

As used in this chapter, the terms, words and phrases shall be defined as follows:

Biochemical oxygen demand (BOD) means the quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five days at 20 degrees Celsius, expressed in milligrams per liter (mg/l) with determinations made in accordance with procedures set forth in Standard Methods.

Board of public works of the City of Marshfield means that committee duly appointed by the mayor.

Building drain means that part of the lowest horizontal piping of a drainage system which receives the discharge from soil, waste or other drainage pipes inside the walls of the building and conveys it to the building sewer, beginning five feet outside of the inner face of the building wall.

Building sewer means the extension from the building drain to the public sewer or other place of disposal.

Category A means sanitary sewer users who discharge normal domestic strength wastewater with concentrations of BOD no greater than 250 mg/l and suspended solids no greater than 250 mg/l.

Category B means those sanitary sewer users who discharge wastewater having pollutant concentrations in excess of 200 mg/l for BOD and 250 mg/l for suspended solids, 40 mg/l for total Kjeldahl nitrogen (TKN), or seven mg/l for total phosphorus (P). Users whose wastewater exceeds the concentration for either of these parameters shall be category B.

Chlorine requirement means the amount of chlorine in milligrams per liter (mg/l) which must be added to sewage to produce a specified residual chlorine content in accordance with procedures set forth in Standard Methods.

City means the City of Marshfield.

Combined sewer means a sewer intended to receive both wastewater and stormwater or surface water.

Compatible pollutants means BOD5, suspended solids, phosphorus, pH or fecal coliform bacteria, plus additional pollutants identified in the WPDES permit for the publicly owned treatment works receiving the pollutants if such works were designed to treat such additional pollutants and in fact do remove such pollutants to a substantial degree.

County means Wood County and/or Marathon County, Wisconsin.

Easement means an acquired legal right for the specific use of land owned by others.

Engineer means the city engineer or his duly authorized representative.

EPA means the United States Environmental Protection Agency.

Floatable oil means oil, fat or grease in a physical state such that it will separate by gravity from wastewater by treatment in an approved pretreatment facility. A wastewater shall be considered free of floatable oil if it is properly pretreated and the wastewater does not interfere with the collection system.

Garbage means solid wastes from domestic and commercial preparation, cooking and dispensing of food, and from the handling, storage and sale of produce.

Incompatible pollutants means wastewater with pollutants that will adversely affect or disrupt the quality of wastewater if discharged to a wastewater treatment facility.

Industrial waste means liquid wastes from industrial manufacturing processes, trade or business as distinct from sanitary sewage.

Major contributing industry means an industry that:

(1) Has a flow of 50,000 gallons or more per average workday.

(2) Has a flow greater than five percent of the flow carried by the municipal system receiving the waste.

(3) Has a material in its discharge included on a list of toxic pollutants issued under Wisconsin Administrative Code NR chapter 215.

(4) Has significant impact, either singularly or in combination with other contributing industries, on the treatment works or the quality of its effluent.

Natural outlet means any outlet into a watercourse, pond, ditch, lake or other body or to the surface water or groundwater.

Normal domestic strength wastewater means wastewater with concentrations of BOD no greater than 200 mg/l, suspended solids no greater than 250 mg/l, total Kjeldahl nitrogen no greater than 40 mg/l, or total phosphorus no greater than seven mg/l.

Operation and maintenance costs means all costs associated with the operation and maintenance of the wastewater collection and treatment facilities as well as the costs associated with periodic equipment replacement necessary for maintaining capacity and performance of wastewater collection and treatment facilities.

Parts per million shall be a weight ratio; the parts per million value multiplied by the factor 8.34 shall be equivalent to pounds per million gallons of water.

Person means any individual, firm, company, association, society, corporation or group, institution, enterprise, governmental agency or other entity.

pH means the logarithm of the reciprocal of the weight of hydrogen ions in grams per liter of solution.

Plant superintendent means the wastewater treatment plant superintendent or his authorized representative.

Properly shredded garbage means wastes from the preparation, cooking or dispensing of food that have been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in the public sewers, with no particle greater than one-half inch in any dimension.

Public sewer means a sewer in which all owners of abutting property have equal rights and which is controlled by the city.

Replacement costs means expenditures for obtaining and installing equipment, accessories or appurtenances which are necessary during the service life of the treatment works to maintain the capacity and performance for which such works are designed and constructed.

Operation and maintenance costs include replacement costs.

Sanitary sewage means a combination of water-carried wastes from residences, business buildings, institutions and industrial plants (other than industrial wastes from such plants), together with such groundwaters, surface waters and stormwaters as may be present.

Sanitary sewer means a sewer which carries sewage and to which stormwaters, surface waters and groundwaters are not intentionally admitted.

Sewer means a pipe or conduit for carrying sewage.

Sewer service charge means a service charge levied on users of the wastewater collection and treatment facilities for payment of capital-related expenses, including interest on indebtedness, as well as operation and maintenance costs of such facilities. User charge, which covers operation and maintenance and replacement costs is a part of the sewer service charge.

Shall is mandatory; may is permissive.

Slug means any discharge of water, wastewater or industrial waste which is a concentration of any given constituent, or in quantity of flow exceeds for any period of duration longer than 15 minutes more than five times the average 24-hour concentration or flows during normal operation and shall adversely affect the system and/or performance of the wastewater treatment works.

Standard Methods means the examination and analytical procedures set forth in the most recent edition of Standard Methods for the Examination of Water, Sewage and Industrial Wastes published jointly by the American Public Health Association, the American Water Works Association and the Water Pollution Control Federation.

Storm drain and storm sewer mean a sewer which carries stormwaters and surface waters and drainage, excluding sewage and industrial wastes.

Stormwater runoff means that portion of the rainfall that is drained into the sewers.

Suspended solids means solids that either float on the surface of, or are in suspension in water, wastewater or other liquids and which are removable by laboratory filtering as prescribed in Standard Methods.

Unpolluted water means water of quality equal to or better than the effluent criteria in effect or water that would not cause violation of receiving water quality standards and would not be benefitted by discharge to the sanitary sewers and wastewater treatment facilities provided.

User charge means a charge levied on users of the wastewater collection and treatment facilities as a part of the sewer service charge for payment of operation and maintenance costs of such facilities.

Utility means the wastewater utility of the city.

Wastewater means a combination of the water-carried wastes from residences, business places, institutions and industrial establishments, together with such groundwaters, surface waters and stormwaters as may be present.

Wastewater facilities means all facilities for collecting, pumping, treating and disposing of sewage.

Wastewater treatment plant means any arrangement of devices and structures used for treating sewage.

Watercourse means a channel in which a flow of water occurs either continuously or intermittently.

WPDES or Wisconsin Pollutant Discharge Elimination System permit means a document issued by the department of natural resources which establishes effluent limitations and monitoring requirements for the municipal wastewater treatment facility. WPDES permit no. WI-0021024 and modifications thereof pertain to the wastewater treatment facility in the city.

(Code 1982, 13.04)