For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
BOD (BIOCHEMICAL OXYGEN DEMAND). The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five days at 20°C expressed in milligrams per liter. Laboratory procedures shall be in accordance with the latest edition of “Standard Methods for the Examination of Water and Wastewater.”
BUILDING DRAIN. That part of the lower 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 five feet outside the inner face of the building wall.
BUILDING SEWER. The extension from the building drain to the public sewer or other place of disposal, also called house connection.
COD (CHEMICAL OXYGEN DEMAND). The quantity of oxygen utilized in the chemical oxidation of organic matter, expressed in milligrams per liter, as determined in accordance with standard laboratory procedures, as set out in the latest edition of “Standard Methods for the Examination of Water and Wastewater.”
COMBINED SEWER. A sewer originally designated to receive both surface water, runoff, and sewage.
GARBAGE. Solid waste resulting from the domestic and commercial preparation, cooking, and dispensing of food and from the handling, storage, or sale of meat, fish, fowl, fruit, vegetable, or condemned food.
INDUSTRIAL WASTES. The solid, liquid, or gaseous wastes resulting from an industrial or manufacturing process, trade, or business, or from the development, recovery, or processing of natural resources.
MAY. MAY is permissive.
NPDES PERMIT (NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM PERMIT). The system for issuing, conditioning, and denying permits for the discharge of pollutants from point sources into the navigable waters, the contiguous zone, and the oceans by the Environmental Protection Agency pursuant to the Federal Water Pollution Control Act of 1972, Sections 402 and 405.
NATURAL OUTLET. Any outlet into a watercourse, pond, ditch, lake, or other body of surface groundwater.
NORMAL DOMESTIC STRENGTH WASTES. Wastes which are characterized by 250 mg per liter BOD and 300 mg per liter suspended solids or less.
OTHER WASTES. Garbage, municipal refuse, decayed wood, sawdust, shavings, bark, lime, sand, ashes, oil, tar, chemicals, offal, and other substances except sewage and other wastes.
pH. The logarithm of the reciprocal of the weight of hydrogen ions in grams per liter of solution.
PROCESS WATER. Any water used in the manufacturing, preparation, or production of goods, materials, or food. PROCESS WATER is an industrial waste.
PUBLIC SEWER. Any sewer owned or operated by a unit or agency of government.
SANITARY SEWER. A sewer which carries sewage and to which storm, surface, and ground water are not intentionally admitted.
SANITARY WASTE. The liquid and water carried wastes discharged from sanitary plumbing facilities.
SEWAGE or WASTEWATER. The water carried waste products from residences, public buildings, institutions, industrial establishments, or other buildings, including the excrementitious or other discharge from the bodies of human beings or animals, together with such ground, surface, and storm waters as may be present.
SEWER. A pipe or conduit for carrying sewage, industrial wastes, or other waste liquids.
SEWER SYSTEM. Pipelines or conduits, pumping stations, force mains, and all other devices and appliances appurtenant thereto used for collecting or conducting sewage, industrial wastes, or other wastes to a point of ultimate disposal.
SHALL. SHALL is mandatory.
SLUG. Any discharge of water, wastewater, or industrial waste which in 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 of flows during the normal operation and adversely affects the collection and/or performance of the wastewater treatment works.
STATE DISPOSAL SYSTEM (SDS) PERMIT. Any permit (including any terms, conditions, and requirements thereof) issued by the MPCA pursuant to M.S. § 115.07, as it may be amended from time to time, for a disposal system as defined by M.S. § 115.01, subdivision 8, as it may be amended from time to time.
STORM SEWER or STORM DRAIN. A sewer which carries storm or surface water and drainage, but excludes sewage and industrial waste, other than unpolluted cooling or process water.
SUSPENDED SOLIDS. Solids that either float on the surface of are in suspension in water, sewage, or other liquids and which are removable by laboratory filtering or in accordance with the latest edition of “Standard Methods for the Examination of Water and Wastewater.”
UNPOLLUTED WATER. Clean water uncontaminated by industrial wastes, other wastes, or any substance which renders such water unclean, noxious, or impure so as to be actually or potentially harmful, detrimental, or injurious to public health, safety, or welfare to domestic, commercial, industrial, or recreational uses, or to livestock, wild animals, birds, fish, or other aquatic life.
WASTEWATER FACILITIES. The structures, equipment, or processes required to collect, carry away, and treat domestic and industrial wastes and dispose of the effluent.
WASTEWATER TREATMENT WORKS or TREATMENT WORKS. An arrangement of devices and structures for treatment of wastewater, industrial waste, and sludge. Sometimes used as synonymous for “wastewater treatment plant,” “waste treatment plant,” “water pollution control plant,” or “sewage treatment plant.”
(Ord. 141, passed 11-6-89)