NR 210.02 HistoryHistory: Cr. Register, October, 1986, No. 370, eff. 11-1-86; CR 12-027: r. and recr. Register July 2013 No. 691, eff. 8-1-13. NR 210.03NR 210.03 Definitions. The definitions of terms and meanings of abbreviations used in this chapter are set forth in s. 283.01, Stats., chs. NR 205 and 218, and as follows: NR 210.03(1)(1) “7-day average” means the arithmetic mean of pollutant parameter values for samples collected in a period of 7 consecutive days. NR 210.03(2)(2) “30-day average” means the arithmetic mean of pollutant parameter values for samples collected in a period of 30 consecutive days. NR 210.03(2e)(2e) “Blending” means the routing of untreated or partially treated wastewater around a biological treatment process, or a portion of a biological treatment process, within a sewage treatment facility. The routing of untreated or partially treated wastewater around a portion of a biological treatment process is considered to be blending only if the entire wastewater flow has not received biological treatment. NR 210.03(2m)(2m) “Building backup” means an accumulation of sewage in any public or private building caused by blockage, failure, or other hydraulic constraint in the sewage collection system or by blockage or failure of the building sewer or private interceptor main sewer. NR 210.03 NoteNote: The discharge from a building sewer or private interceptor main sewer directly to a water of the state may be a sanitary sewer overflow and may be subject to the WPDES permit requirements of ch. 283, Stats. NR 210.03 NoteNote: Section NR 110.03 (6s) reads: “Building sewer” means that part of the drain system not within or under a building which conveys its discharge to a public sewer, private interceptor main sewer, private onsite wastewater treatment system, or other point of discharge or dispersal. NR 210.03(3)(3) “CBOD5” means the 5-day carbonaceous biochemical oxygen demand. NR 210.03(3h)(3h) “Combined sewer overflow” means a release of wastewater from a combined sewer system directly into a water of the state or to the land surface. NR 210.03(3p)(3p) “Combined sewer system” means a wastewater collection system owned by a municipality that conveys domestic, commercial, and industrial wastewater and storm water runoff through a single pipe system to a publicly owned treatment works. NR 210.03 NoteNote: Section NR 110.03 (7s) reads: “Combined sewer treatment facility” means all the structures, pipes, and other equipment that constitute the various treatment processes and treatment units employed to reduce pollutants in wastewater from combined sewer systems. NR 210.03(4)(4) “Disinfection” means the operation of an ultraviolet lamp unit, or the addition of chemical disinfectants with adequate mixing and detention times, to provide pathogen reductions. NR 210.03(5)(5) “Effluent concentrations consistently achievable through proper operation and maintenance” means: NR 210.03(5)(a)(a) For a given pollutant parameter, the 95th percentile value for the 30-day average effluent quality achieved by a treatment works in a period of at least 2 years, excluding values attributable to upsets, bypasses, operational errors, or other unusual conditions, and NR 210.03(5)(b)(b) A 7-day average value equal to 1.5 times the value derived under par. (a). NR 210.03(6)(6) “Facilities eligible for treatment equivalent to secondary treatment” means treatment works which meet all of the following: NR 210.03(6)(a)(a) The BOD5 and SS effluent concentrations consistently achievable through proper operation and maintenance of the treatment works exceed the minimum level of the effluent quality set forth in s. NR 210.05 (1) (a) and (b); NR 210.03(6)(b)(b) Trickling filters, aerated lagoons or waste stabilization ponds are used as the principal processes; and NR 210.03(6)(c)(c) The treatment works provide significant biological treatment of municipal wastewater. NR 210.03(6e)(6e) “Hydraulic constraint” means the structural collapse of a sewer, an accumulation of material in a sewer or an insufficiently-sized sewer such that sewage flow is impeded or stopped from flowing downstream. NR 210.03 NoteNote: Section NR 110.03 (16) reads: “Infiltration” means water other than wastewater that enters a sewerage system (including sewer service connections) from the ground through such sources as defective pipes, pipe joints, connections, or manholes. Infiltration does not include, and is distinguished from, inflow. NR 210.03 NoteNote: Section NR 110.03 (17) reads: “Inflow” means water other than wastewater that enters a sewerage system (including sewer service connections) from sources such as roof leaders, cellar drains, yard drains, area drains, foundation drains, sump pumps, drains from springs and swampy areas, manhole covers, cross connections between storm sewers and sanitary sewers, catch basins, cooling towers, storm waters, surface runoff, street wash waters, or drainage. Inflow does not include, and is distinguished from, infiltration.