For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
ACT. The Federal Water Pollution Control Act, also referred to as the Clean Water Act, as amended, 33 U.S.C. 1251, et seq.
ASTM. American Society for Testing Materials.
AUTHORITY. The City of Madison Lake, Minnesota or its representative thereof.
BIOCHEMICAL OXYGEN DEMAND (BOD). The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in 5 days at 20 degrees Centigrade, expressed in terms of weight and concentration (milligrams per liter (mg/l)).
BIOSOLIDS. Sewage sludge that has been treated to meet the regulatory requirements for land application set out in the Code of Federal Regulations, Title 40 (Part 503).
BUILDING DRAIN. That part of the lowest horizontal piping of a drainage system which receives the discharge from waste and other drainage pipes inside the walls of the building and conveys it to the building sewer, beginning immediately outside the building wall.
BUILDING SEWER. The extension from the building drain to the public sewer or other place of disposal, also referred to as a house connection or service connection.
CARBONACEOUS BIOCHEMICAL OXYGEN DEMAND (CBOD). BOD to which a chemical inhibitor has been added to inhibit the nitrogenous demand and provide a direct measurement of carbonaceous demand.
CITY. The area within the corporate boundaries of the City of Madison Lake as presently established or as amended by ordinances or other legal actions at a future time. The term CITY, when used herein, may also be used to refer to the City Council and its authorized representative.
CHEMICAL OXYGEN DEMAND (COD). The quantity of oxygen utilized in the chemical oxidation of organic matter as determined by standard laboratory procedures, and as expressed in terms of milligrams per liter (mg/l).
COMMERCIAL. Retail or wholesale type establishments, i.e., restaurants, hotels, motels, stores, filling station, commercial laundry, etc., and multiple-family units and apartments not meeting the “residential” classification, that discharge wastewater into the public wastewater treatment system, works and facility.
COMMERCIAL USER. Any place of business which discharges domestic strength waste.
COMPATIBLE POLLUTANT. Biochemical oxygen demand, suspended solids, pH, and fecal coliform bacteria, plus additional pollutants identified in the NPDES/SDS permit if the treatment facilities are designed to treat such pollutants to a degree which complies with effluent concentration limits imposed by the permit.
CONTROL MANHOLE. A structure specially constructed for the purpose of measuring flow and sampling of wastes.
DEBT SERVICE. Revenue to be used solely for retirement of outstanding debts of the city's wastewater treatment works.
EASEMENT. An acquired legal right for the specific use of land owned by others.
EXTRA STRENGTH WASTE. Wastewater having a BOD and/or total suspended solids greater than normal domestic strength waste and not otherwise classified as an incompatible waste.
FECAL COLIFORM. Any number of organisms common to the intestinal tract of man and animals whose presence in sanitary sewage is an indicator of pollution.
FLOATABLE OIL. Oil, fat, or grease in a physical state, such that it will separate by gravity from wastewater.
GARBAGE. Animal and vegetable waste resulting from the handling, preparation, cooking, and serving of food.
GOVERNMENTAL/INSTITUTIONAL-HOSPITAL. Nursing homes; schools; city, county, state or federal industrial buildings; or facilities that discharge wastewater into the public wastewater treatment system, works and facility.
GOVERNMENTAL USER. Any unit, agency, or instrument of federal, state or local government which discharges domestic strength water.
INCOMPATIBLE POLLUTANT. Any pollutant that is not defined as a “compatible pollutant”, including non-biodegradable dissolved solids.
INDUSTRIAL. An “industry”, as defined elsewhere in this section, which discharges wastewater into the public treatment, works, and facility.
INDUSTRIAL USER. A facility which discharges to city's wastewater treatment system liquid waste resulting from the processes employed in industrial, manufacturing, trade, or business establishments, or from the development of any natural resource.
INDUSTRIAL WASTE. Gaseous, liquid, and solid wastes resulting from industrial or manufacturing processes, trade or business, or from the development, recovery, and processing of natural resources, as distinct from residential or domestic strength wastes.
INDUSTRY. Any nongovernmental or nonresidential user of a publicly owned treatment works which is identified in the Standard Industrial Classification Manual, latest edition, which is categorized in Divisions A, B, D, E, and I.
INFILTRATION. Water entering the sewage system (including building drains and pipes) from the ground through such means as defective pipes, pipe joints, connections, and manhole walls.
INFILTRATION/INFLOW (I/I). The total quantity of water from both infiltration and inflow.
INFLOW. Water, other than wastewater, that enters a sewer system (including building drains) from sources such as, but not limited to, roof leaders, cellar drains, yard and area drains, foundation drains, drains from springs and swampy areas, manhole covers, cross-connections from storm sewers, catch basins, surface runoff, street wash waters or drainage.
INTERFERENCE. The inhibition or disruption of the city's wastewater treatment system processes or operations which causes or significantly contributes to a violation of any requirement of the city's NPDES State Disposal System Permit. The term includes prevention of wastewater sludge use or disposal by the city in accordance with published regulations providing guidelines under Section 405 of the Act or any regulations developed pursuant to the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act, or more stringent state criteria applicable to the method of disposal or use employed by the city.
MPCA. Minnesota Pollution Control Agency.
NATIONAL CATEGORICAL PRETREATMENT STANDARDS. Federal regulations establishing pretreatment standards for introduction of pollutants in publicly-owned wastewater treatment facilities which are determined to be not susceptible to treatment by such treatment facilities or would interfere with the operation of such treatment facilities, pursuant to Section 307 (b) of the Act.
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) PERMIT. Any permit or requirements issued by the Minnesota Pollution Control Agency (MPCA) pursuant to the Federal Water Pollution Control Act, as amended for the purpose of regulating the discharge of wastewater, industrial wastes, or other wastes under the authority of Section 402 of the Act.
NATURAL OUTLET. Any outlet, including storm sewers and combined sewers, which overflow into a watercourse, pond, ditch, lake or other body of surface water or ground water.
NON-CONTACT COOLING WATER. The water discharged from any use such as air conditioning, cooling or refrigeration, through which process the only pollutant added to the water is heat.
NORMAL DOMESTIC STRENGTH WASTE. Wastewater that is primarily introduced by residential users with a BOD5 concentration not greater than 260 mg/l and a suspended solids (TSS) concentration not greater than 280 mg/l.
OPERATION AND MAINTENANCE. Those variable expenditures and costs which are directly attributable to the operations and maintenance of a waste treatment works. The term "O & M" includes REPLACEMENT.
ORTHO PHOSPHORUS. Ortho phosphorus is termed the reactive phosphorus. It is the portion of phosphorus that responds to colorimetric tests without preliminary hydrolysis or oxidative digestion of a sample. (Standard Methods 19th Edition.)
PERSON. The state or any agency or institution thereof, any municipality, governmental subdivision, public or private corporation, individual, partnership, or other entity, including, but not limited to, association, commission or any interstate body, and including any officer or governing or managing body of any municipality, governmental subdivision or public or private corporation, or other entity.
pH. A measure of the acidity or basicity of a waste. It is defined as the negative logarithm of the hydrogen ion concentration in moles per liter.
PRETREATMENT. The process of reducing the amount of pollutants, eliminating pollutants, or altering the nature of pollutant properties in wastewater to a less harmful state prior to introducing such pollutants in the city's wastewater treatment system. The reduction, elimination, or alteration may be obtained by physical chemical or biological processes, process changes or other means, except as prohibited by this subchapter.
PROPERLY SHREDDED GARBAGE. The wastes from the preparation, cooking and 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 public sewers with no particle greater than 1/2 inch (1.27 cm) in any dimension.
REPLACEMENT. Expenditures for obtaining and installing equipment, accessories, or appurtenances which are necessary during the useful life of the treatment works to maintain the capacity and performance of the treatment facility for which it was designed and constructed.
RESIDENTIAL. A principal family residence or habitation classed as a single-family or two-family dwelling that discharges domestic sanitary wastewater having characteristics of 260 mg/l BOD and 280 mg/l suspended solids, into the public wastewater treatment system, works, and facility.
SEWAGE. The spent water of a community. The preferred term is WASTEWATER.
SEWER. A pipe or conduit that carries wastewater or drainage water.
(1) COLLECTION SEWER. A sewer whose primary purpose is to collect wastewater from individual point source discharges and connections.
(2) COMBINED SEWER. A sewer intended to serve as a sanitary sewer and a storm sewer.
(3) FORCE MAIN. A pipe in which wastewater is carried under pressure.
(4) INTERCEPTOR SEWER. A sewer whose primary purpose is to transport wastewater from collection sewers to a treatment facility.
(5) PRIVATE SEWER. A sewer which is not owned and maintained by a public authority.
(6) PUBLIC SEWER. A sewer owned, maintained and controlled by a public authority.
(7) SANITARY SEWER. A sewer intended to carry only liquid and water-carried wastes from residences, commercial buildings, industrial plants, and institutions, together with minor quantities of ground, storm, and surface waters which are not admitted intentionally.
(8) STORM SEWER or STORM DRAIN. A drain or sewer intended to carry storm waters, surface runoff, ground water, sub-surface water, street wash water, drainage, and unpolluted water from any source.
SEWER SERVICE CHARGE SYSTEM. The system of charges by which revenue is generated to offset the cost of operation and maintenance plus replacement, administration, and debt service.
SHALL. Shall is mandatory; may is permissive.
SIGNIFICANT INDUSTRIAL USER. Any industrial user of the city's wastewater treatment system which:
(1) Has a drainage flow of 25,000 gallons or more per average work day; or
(2) Has in its wastes toxic pollutants at significant levels as defined pursuant to Section 307 of the Act or Minnesota Statutes and Rules; or
(3) Has a significant impact, either singly or in combination with other contributing industries, on the wastewater treatment system, the quality of sludge, the system's effluent quality, or air emissions generated by the system; or
(4) Is subject to Categorical Pretreatment Standards, under 40 CFR 403.6 and 40 CFR Chapter I, Subchapter N; or
(5) Contributes a process waste stream which makes up 5% or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant; or
(6) Is designated as significant by the permittee on the basis that the industrial user has a reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement.
SIGNIFICANT NONCOMPLIANCE (SNC). Industrial user violations meeting 1 or more of the following criteria:
(1) Chronic violations of wastewater discharge limits, defined here as those in which 66% or more of all the measurements taken during a 6-month period exceed (by any magnitude) the daily maximum limit or the average limit for the same pollutant parameter;
(2) Technical Review Criteria (TRC) violations, defined here as those in which 33% or more of all the measurements for each pollutants parameter taken during a 6-month period equal or exceed the product of the daily maximum limit or the average limit multiplied by the applicable TRC (TRC - 1.14 for BOD, TSS, fats, oil and grease and 1.2 for all other pollutants except pH);
(3) Any other violation of a pretreatment effluent limit (daily maximum or longer-term average) that the Control Authority determines has caused, alone or in combination with other discharges, interference or pass through (including endangering the health of POTW personnel or the general public);
(4) Any discharge of a pollutant that has caused imminent endangerment to human health, welfare or to the environment or has resulted in the POTW's exercise of its emergency authority under § 52.67 (P) to halt or prevent such a discharge;
(5) Failure to meet, within 90 days after the schedule date, a compliance schedule milestone contained in a local control mechanism or enforcement order for starting construction, completing construction or attaining final compliance;
(6) Failure to provide, within 30 days after the due date, required reports such as baseline monitoring reports, 90-day compliance reports, periodic self-monitoring reports and reports on compliance with compliance schedules;
(7) Failure to accurately report noncompliance;
(8) Any other violation or group of violations which the Control Authority determines will adversely affect the operation or implementation of the local pretreatment program.
SLUG. Any waste discharge which, in connection for any given constituent or in quantity of flow, exceeds 4 times the average 24-hour concentration or flow during normal operation.
STATE. State of Minnesota.
STATE DISPOSAL SYSTEM PERMIT. Any permit (including any terms, conditions and requirements thereof), issued by the MPCS pursuant to M.S. § 115.07, as may be amended from time to time, for a treatment system as defined by M.S. § 115.01, Subdivision 8, as may be amended from time to time.
STORM WATER. Any flow occurring during or following any form of natural precipitation and resulting therefrom.
STORM WATER SYSTEM. Consists of streets, curb and gutters, catch basins, manholes, watercourses and all other structures, appurtenances and facilities that store and/or convey storm water.
SUPERINTENDENT. The Superintendent of the city wastewater treatment system, or the Superintendent's duly authorized representative.
SURCHARGE. A treatment charge assessed by the city to industrial users based on wastewater volume and CBOD and/or TSS exceeding base concentrations and other parameters designated by the City of Mankato.
SUSPENDED SOLIDS. The total suspended matter that floats on the surface of, or is suspended in, water, wastewater or other liquids, and which is removable by a standard glass fiber filter.
TOTAL PHOSPHORUS. Total phosphorus is chemically defined as the measurement of condensed ortho phosphate and organically bound phosphates. It is analytically defined as the measurement of reactive phosphates, hydrolysable phosphates and organically bound phosphates. (Standard Methods 19th Edition.)
TOXIC POLLUTANT. The concentration of any pollutant or combination of pollutants which, upon exposure to or assimilation into any organism, will cause adverse effects as defined in standards issued pursuant to Section 307(a) of the Act.
TREATMENT AUTHORITY. The City of Mankato, Minnesota or its representative thereof.
UNPOLLUTED WATER. 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. See NON-CONTACT COOLING WATER.
USER. Any person who discharges, causes or permits the discharge or placement of wastewater into the city's wastewater treatment system.
USER CHARGE. A charge levied on users of the treatment works for the operation and maintenance of such works.
WASTEWATER. The liquid and water-carried industrial or domestic wastes from dwellings, commercial buildings, industrial facilities, and institutions, together with any groundwater, surface water, and storm water that may be present, whether treated or untreated, which is discharged into or permitted to enter the city's wastewater treatment system.
WASTEWATER TREATMENT SYSTEM or SYSTEM. Any devices, facilities, structures, equipment or works owned or used by the city for the purpose of the transmission, storage or treatment of industrial and domestic wastewater including intercepting sewer, outfall sewers, wastewater collection system, pumping, and other equipment, and their appurtenances; extensions, improvements, remodeling, additions, and alterations thereof, and any works, including land that will be an integral part of the treatment process or is used for ultimate disposal of residues resulting from such treatment.
WATERCOURSE. A natural or artificial channel for the passage of water, either continuously or intermittently.
WATERS OF THE STATE. All streams, lakes, ponds, marshes, aquifers, irrigation systems, drainage systems and all other bodies or accumulations of water, surface or underground, natural or artificial, public or private, which are contained within, flow through, or border upon the state or any portion thereof.
WEF. The Water Environment Federation.
(Ord. 2009-2, passed 8-17-2009)