Wisconsin Administrative Code › Department of Natural Resources › NR 100-199 - Environmental Protection - General › Chapter NR 110 - Sewerage Systems › Section NR 110.03 - Definitions

Current through June 24, 2024
For purposes of this chapter:
(1) "Approved areawide waste treatment
				management plan" means a plan or element thereof developed pursuant to Section
				208 of the Federal Water Pollution Control Act Amendments of 1972 as amended by
				the Clean Water Act Amendments of 1977 (
				33 USC
				1251 et seq.) and approved by the state of
				Wisconsin.
(2) "Approval" means the
				written approval of the department for any project requiring approval pursuant
				to s.
				281.41, Stats.,
				and s.
				NR
				108.03.
(4) "ASTM" means standards developed by ASTM
				International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA
				19428-2959.
Note:
Copies of ASTM standards referenced in
				  this chapter are available for inspection at the office of the department of
				  natural resources, the secretary of state's office, and the legislative
				  reference bureau, and may be obtained for personal use from ASTM International,
				  100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.
(6) "AWWA" means the American
				Water Works Association, 6666 West Quincy Avenue, Denver, CO 80235.
Note:
Copies of AWWA standards referenced in
				  this chapter are available for inspection at the offices of the department of
				  natural resources, the secretary of state's offices, and the legislative
				  reference bureau, and may be obtained for personal use from the American Water
				  Works Association, 6666 West Quincy Avenue, Denver, CO 80235.
(6e) "Bedrock" means the rocks that underlie
				soil material or where weathered in-place consolidated material larger than 2
				millimeters in size is greater than 50% by volume.
(6m) "Blending" has the meaning specified
				under s.
				NR
				210.03(2e).
Note:
Section
				  NR
				  210.03(2e) reads: "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.
(6s) "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.
Note:
This is the same definition as contained
				  in s.
				  SPS
				  381.01(44). A building sewer may also
				  be referred to as a building lateral.
(7) "Bypass" has the meaning specified in s.
				NR
				205.03(5).
Note:
Section
				  NR
				  205.03(5) reads: "Bypass" means the
				  intentional diversion of waste streams from any portion of a sewage treatment
				  facility or a wastewater treatment facility. A bypass does not include a
				  building back-up or a combined sewer overflow.
(7e) "Combined sewer overflow" has the
				meaning specified under s.
				NR
				210.03(3h).
Note:
Section
				  NR
				  210.03(3h) reads: "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.
(7m) "Combined sewer system" has the meaning
				specified under s.
				NR
				210.03(3p).
Note:
Section
				  NR
				  210.03(3p) reads: "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.
(7s) "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.
(9) "Controlled diversion" has the meaning
				specified under s.
				NR
				205.03(9m).
Note:
Section
				  NR
				  205.03(9m) and Note reads:
				  "Controlled diversion" means the routing of untreated or partially treated
				  wastewater around any treatment unit within a sewage or wastewater treatment
				  facility which is then recombined with undiverted wastewater prior to the
				  effluent sampling location and prior to effluent discharge.
Note:
Controlled diversions at a sewage
				  treatment facility do not include blending and may occur only in compliance
				  with s.
				  NR 205.07(1)
				  (v).
(11) "Cost-effective analysis" means a
				systematic comparison of alternative means of meeting state water quality
				standards, effluent limitations or other treatment standards in order to
				identify the alternative which will minimize the total resources costs over the
				planning period. These resources costs include monetary costs and environmental
				as well as other non-monetary costs.
(12) "Department" means the department of
				natural resources.
(12g) "Design
				flow" means the anticipated wastewater discharge rate to a sewerage system
				component, which is used to design the sewerage system component to provide
				compliance with WPDES permit limits and other performance objectives, during
				the most critical operating conditions anticipated within the design planning
				period. Specific design flow terms used in this chapter, include the following:
(a) "Average daily base flow" means the
				average of the daily flow volumes anticipated to occur for a continuous
				12-month period, less infiltration and inflow, and expressed as a daily
				average.
(b) "Average design flow"
				means the average of the daily flow volumes anticipated to occur for a
				continuous 12-month period, expressed as a daily average.
(c) "Maximum month design flow" means the
				largest volume of flow anticipated to occur during a continuous 30-day period,
				expressed as a daily average.
(d)
				"Maximum week design flow" means the largest volume of flow anticipated to
				occur during a continuous 7-day period, expressed as a daily average.
(e) "Maximum day design flow" means the
				largest volume of flow anticipated to occur during a one-day period, expressed
				as a daily average.
(f) "Maximum
				hour design flow" means the largest volume of flow anticipated to occur during
				a one-hour period, expressed as a daily or hourly average.
(g) "Peak instantaneous design flow" means
				the maximum anticipated instantaneous flow.
(h) "Peak design flow" and maximum design
				flow" mean the largest volume of flow anticipated to occur on an infrequent
				basis, expressed as a daily average. The "peak design flow" or "maximum design
				flow" may be equal to any one of the design flows defined in pars. (c) to
				(g).