§ 26-138. Definitions.

The following words, terms and phrases, when used in this article, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:

Approving authority means the village board or its authorized deputy, agent, representative, or consulting engineer. Approving authority and village are used interchangeably.

BOD (biochemical oxygen demand) means the quantity of oxygen utilized in the biochemical oxidation of organic matter, under standard laboratory procedure, in five days at 20 degrees Centigrade and expressed in milligrams per liter (mg/l).

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

Commercial and institutional user means those users of the publicly owned treatment works which are not residential and are not classified as an industrial user.

Compatible pollutants means those pollutants generally characterized as BOD, suspended solids, pH, and fecal coliforms, together with any additional pollutants defined in the WPDES permit, unless the concentrations of any of these pollutants are such that they interfere with the operation of the treatment works or exceed the limits established under sections 26-161 and 26-162.

Debt service charge means that charge to the users which shall, in whole or in part, defray the costs of retiring the debts incurred in the construction of any wastewater facilities by the village.

Domestic wastewater means waterborne wastes normally being discharged from the sanitary conveniences of dwellings, apartment houses, hotels, office buildings, factories and institutions, free of industrial wastes and in which the average concentration of suspended solids is established at or below 235 mg/l and the BOD is established at or below 235 mg/l.

Flat charge means the charge made to unmetered users for use of the treatment works.

Incompatible pollutants are all pollutants which are not compatible.

Industrial user means:

(1)

Any nongovernmental user of publicly owned treatment works which discharges more than 25,000 gallons per day of sanitary waste, or a volume of process waste, or combined process and sanitary waste equivalent to 25,000 gallons per day of sanitary waste. Sanitary wastes are the wastes discharged from the average residential waste discharge to the village's service area. The strength of the average residential discharge to the village's service area shall be defined in terms of a concentration of 235 mg/l biochemical oxygen demand (BOD) and 235 mg/l suspended solids (SS). These concentrations will be applied in determining equivalent volumes of process waste or combined discharges of sanitary and process wastes;

(2)

Any nongovernmental user of a publicly owned treatment works which discharges wastewater to the treatment works which contains toxic pollutants or poisonous solids, liquids, or gases in sufficient quantity either singly or by interaction with other wastes, to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in or have an adverse effect on the waters receiving any discharge from the treatment works; or

(3)

Any nongovernmental user of the publicly owned treatment works that engages in the processing, blending, assembling or in some way transforming of materials or substances into new products. This type of user would normally occupy an establishment described as a plant, factory, or mill.

Industrial waste means the wastewater from an industrial user as distinct from domestic wastewater.

Minimum charge means the amount charged to each user irrespective of use. This charge does not provide the user a minimum amount of use.

Operationial and maintenance costs means all costs incurred in the operation and maintenance of the village's wastewater treatment works. This class of cost shall include, but not be limited to, labor, energy, chemicals, and replacement costs and excludes debt retirement.

pH means the logarithm (base ten) of the reciprocal of the hydrogen ion concentration in gram moles per liter of solution as determined by acceptable laboratory procedures.

Replacement cost means expenditures for obtaining and installing equipment, accessories, or appurtenances which are necessary to maintain the capacity and performance during the service life of the treatment works for which such works were designed and constructed. The term "operation and maintenance" includes replacement. The yearly replacement cost is calculated as follows:

a = present installed cost/projected service life

Residential user means a user of the publicly owned treatment works that would occupy an establishment considered a house or apartment and other facilities in which people live.

Sanitary sewer means a sewer that conveys domestic wastewater or industrial waste or a combination of both and into which storm, surface, and groundwaters or unpolluted industrial wastewater are not intentionally passed.

Sewer service charge means the sum of the minimum charge, user charge, debt service charge, and any applicable surcharge.

Slug means any discharge or water or wastewater which, in concentrations 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 normal operation and which adversely affects the collection system and/or performance of the wastewater treatment plant.

Standard methods means the examination and analytical procedures set forth in the most recent edition of "Standard Methods for the Examination of Water and Wastewater," published jointly by the American Public Health Association, the American Waterworks Association and the Water Environment Federation.

Storm sewer means a sewer which carries storm and surface drainage but excludes domestic wastewater and industrial wastes.

Surcharge means an additional charge related to industrial wastes being discharged by any user having unusual characteristics such as excessive BOD, excessive suspended solids, or other pollutants.

Suspended solids (SS) means total suspended matter that either floats on the surface of or is in suspension in water, sewage, or other liquids and which is removable by a laboratory filtration device. Quantitative determination of SS shall be made in accordance with procedures set forth in "Standard Methods."

Unpolluted water is 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.

User means any person discharging domestic wastewater or industrial wastes into the collection system.

User charge means that charge to users of the treatment plant which adequately provides for proportionate recovery of the operation and maintenance costs.

User class means a group of users having similar wastewater flows and characteristics, levels of BOD, suspended solids, etc.

Wastewater means a combination of the water-carried waste discharged into the collection system from residences, commercial buildings, institutions, and industrial establishments, together with such groundwater, surface water and stormwater as may be present.

Wastewater treatment works means all facilities for collection, pumping, treating, and disposing of domestic wastewater and industrial waste.

WPDES permit means the state pollutant discharge elimination system permit, which allows the village to discharge wastes to a watercourse, provided those wastes meet the conditions of the permit.

(Code 1990, § 9-2-2)