Chapter NR 210

Register July 2010 No. 655

Chapter NR 210

SEWAGE TREATMENT WORKS

Subchapter I — General

NR 210.01   Purpose.

NR 210.02   Applicability.

NR 210.03   Definitions.

Subchapter II — Monitoring Requirements and
Effluent Limitations

NR 210.035   Applicability.

NR 210.04   Monitoring requirements.

NR 210.05   Effluent limitations.

NR 210.06   Disinfection requirements.

NR 210.07   Effluent limitation variance categories.

Subchapter III — Operations, Analyses, and Reports

NR 210.08   Emergency operation.

NR 210.09   Analytical methods and laboratory requirements.

NR 210.10   Requirements for certified or registered laboratory.

NR 210.11   Compliance maintenance annual report (CMAR).

NR 210.12   Blending.

Subchapter IV — Overflows and Sewage Collection Systems

NR 210.19   Applicability.

NR 210.20   Permits for satellite sewage collection systems.

NR 210.205   Combined sewer systems and overflows.

NR 210.21   Sanitary sewer overflows and sewage treatment facility overflows.

NR 210.22   Building Backups.

NR 210.23   Capacity, Management, Operation, and Maintenance Programs.

NR 210.24   System Evaluation and Capacity Assurance Plan.

NR 210.25   Emergency Operation — Lift Stations.

Ch. NR 210 Note Note: Chapter NR 210 as it existed on October 31, 1986 was repealed and a new chapter NR 210 was created effective November 1, 1986. Corrections made under s. 13.93 (2m) (b) 7., Stats., Register, March, 1997, No. 495.

Subchapter I — General

NR 210.01 NR 210.01 Purpose. The purpose of this chapter is to establish effluent limitations, performance requirements and monitoring provisions to be used in permits for discharges from publicly owned treatment works and privately owned domestic sewage treatment works.

NR 210.01 History History: Cr. Register, October, 1986, No. 370, eff. 11-1-86; CR 12-027: am. Register July 2013 No. 691, eff. 8-1-13.

NR 210.02 NR 210.02 Applicability. This chapter applies to all publicly owned treatment works and privately owned domestic sewage treatment works.

NR 210.02 History History: 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 210.03 NR 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 Note Note: 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(2s) (2s) “Building sewer” has the meaning specified under s. NR 110.03 (6s).

NR 210.03 Note Note: 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(3d) (3d) “CMOM” means a capacity, management, operation, and maintenance program under s. NR 210.23.

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(3t) (3t) “Combined sewer treatment facility” has the meaning specified under s. NR 110.03 (7s).

NR 210.03 Note Note: 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.