NR 206.07
NR 206.07 General conditions required for all land disposal systems. NR 206.07(1)(a)(a) A land disposal system shall be constructed in accordance with the design criteria in
ch. NR 110, or the appropriate rules promulgated by the department of safety and professional services for large scale subsurface soil absorption systems.
NR 206.07(1)(b)
(b) Background groundwater monitoring data described in
ss. NR 140.20 (1) and
206.10 (4) shall be collected prior to the design of a land disposal system, and submitted to the department as part of the facility plan required in
s. NR 110.09.
NR 206.07(1)(c)
(c) Land disposal systems shall be designed and operated to maintain compliance with the groundwater quality standards contained in
ch. NR 140, as required by
s. NR 140.22 (1).
NR 206.07(2)(a)(a) No discharge to a land disposal system may exceed the loadings specified in the WPDES permit for the system.
NR 206.07(2)(b)
(b) No discharge to the system may have physical or chemical characteristics which prevent the proper operation of the land disposal system.
NR 206.07(2)(c)
(c) The discharge of toxic or hazardous pollutants to land disposal systems is prohibited unless the applicant can demonstrate and the department determines that the discharge of such pollutants will be in such small quantities that no detrimental effect on groundwater or surface water will result. The criteria used shall include but not be limited to the toxicity of the pollutant, capacity of the soil to remove the pollutant, degradability, usual or potential presence of the pollutant in the existing environment, method of application and all other relevant factors.
NR 206.07(2)(d)
(d) The underground injection of municipal and domestic wastewaters through a well is prohibited.
NR 206.07(2)(e)
(e) All municipal and domestic wastewater land disposal systems shall be preceded by a biological, chemical or physical treatment or a combination of treatments approved by the department. Industrial waste discharges tributary to the municipal treatment works shall be in compliance with applicable pretreatment standards under
s. NR 211.30.
NR 206.07(2)(f)
(f) For a land disposal system located on a site where soil, geologic or other conditions may result in an increased possibility of groundwater contamination, the department may require additional treatment prior to discharge to such land disposal systems.
NR 206.07(2)(g)
(g) Discharge to a land disposal system shall be limited so that the discharge and any precipitation which falls within the boundary of the disposal system during such discharge does not overflow the boundary of the system unless the WPDES permit authorizes collection and discharge of runoff to a surface water.
NR 206.07(2)(h)1.1. All land disposal facilities shall be operated in accordance with an approved management plan. The management plan shall conform to the requirements of
s. NR 110.25 (3m).
NR 206.07(2)(h)2.
2. For all land disposal facilities approved after December 1, 1990, an acceptable management plan shall be submitted with the construction plans and specifications.
NR 206.07(2)(h)3.
3. For land disposal facilities constructed prior to December 1, 1990, an acceptable management plan shall be submitted in accordance with a schedule established by the department.
NR 206.07(2)(h)4.
4. If operational changes are needed the management plan shall be revised.
NR 206.07(2)(h)5.
5. All management plans and revisions to management plans shall be submitted to the department for review to determine adequacy and compliance with code requirements.
NR 206.07 History
History: Cr.
Register, March, 1985, No. 351, eff. 4-1-85; r. (2) (i) and (j),
Register, September, 1987, No. 381, eff. 10-1-87; am. (1) and (2) (e), r. (2) (f), renum. (2) (g) and (h) to be (2) (f) and (g), cr. (2) (h),
Register, November, 1990, No. 419, eff. 12-1-90;
correction in (1) (a) made under s. 13.92 (4) (b) 6., Stats., Register January 2012 No. 673. NR 206.08
NR 206.08 Effluent limitations for specific types of land disposal systems. NR 206.08(1)(b)1.1. The discharge to an absorption pond system may not exceed a monthly average BOD
5 concentration of 50 mg/l.
NR 206.08(1)(b)3.
3. The discharge to an absorption pond system which is subject to the groundwater quality standards in
ss. NR 140.10 and
140.12 shall comply with the following limitations:
NR 206.08(1)(b)3.a.
a. The monthly average total nitrogen concentration may not exceed 10 mg/l.
NR 206.08(1)(b)4.
4. If an absorption pond system has been granted an exemption to groundwater quality standards under
s. NR 140.28, the discharge requirements for nitrogen, total dissolved solids and chloride will be determined by the department on a case-by-case basis. Information to be considered in approving alternate limitations shall include:
NR 206.08(1)(b)4.e.
e. Expected increase in the concentration of a pollutant in groundwater downgradient at the point of standards application.
NR 206.08(1)(b)5.
5. The department may approve alternative effluent limitations in accordance with
s. NR 206.06 for total nitrogen, BOD
5, hydraulic application rate, total dissolved solids and chlorides; and may require effluent limitations for additional substances on a case-by-case basis in order to protect and maintain groundwater quality as required in
ch. NR 140.
NR 206.08 Note
Note: The effluent limitations in par. (b) 3. have been established to provide compliance with the groundwater enforcement standards for nitrate, total dissolved solids and chloride. The department has determined that it is not technically and economically feasible for absorption pond systems to comply with the preventive action limits for these substances. These effluent limitations, in combination with groundwater monitoring requirements, will assist the department in minimizing the levels of nitrate, total dissolved solids and chloride in the groundwater, to the extent technically and economically feasible. Groundwater enforcement standards and preventive action limits are specified in ss.
NR 140.10 and
140.12.
NR 206.08(2)(b)1.1. Discharge shall be limited to prevent any runoff of effluent from the site. Wastewater may not be sprayed during any rainfall event that causes runoff from the site. Uncontaminated storm water may be allowed to drain from a spray irrigation field.
NR 206.08(2)(b)2.
2. The volume of discharge shall be limited to prevent ponding, except for temporary conditions following rainfall events.
NR 206.08(2)(b)4.
4. The department may limit the fecal coliform bacteria in the discharge to the spray irrigation system based on the potential impact to public health.
NR 206.08(2)(b)5.
5. The hydraulic application rate for each system shall be based on hydrogeologic conditions, soil texture, permeability, cation exchange capacity, topography, cover crop and wastewater characteristics. The average hydraulic application rate may not exceed 10,000 gallons per acre per day.
NR 206.08 Note
Note: Based upon the department's experience, the recommended range for the average hydraulic application rate is 2,000 to 7,000 gallons per acre per day, based on a monthly average.
NR 206.08(2)(b)6.
6. The annual nitrogen application rate shall be limited to the nitrogen needs of the cover crop plus demonstrable denitrification occurring in the treatment system. Determination of the annual nitrogen application rate shall include the nitrogen supplied by the wastewater and any supplemental fertilizers used.
NR 206.08(2)(b)7.
7. The soil at each individual spray irrigation field shall be tested annually for nitrogen, available phosphorus, available potassium and pH. The results of these analyses shall be submitted to the department and used to manage the spray irrigation system.
NR 206.08(2)(b)8.
8. The department may limit additional parameters as necessary to protect and maintain groundwater quality as required in
ch. NR 140.
NR 206.08(3)(b)1.1. Discharge to a ridge and furrow system shall be limited so that the discharge and precipitation from a 10-year frequency, 24-hour duration rainfall event does not overflow the boundary of the system.
NR 206.08(3)(b)2.
2. The discharge shall be alternately distributed to individual sections of the disposal system to allow sufficient resting periods to maintain the treatment capability of the soil.
NR 206.08(3)(b)4.
4. The volume of discharge shall be limited to prevent inundation of the ridges except for temporary conditions following precipitation events.
NR 206.08(3)(b)5.
5. The average hydraulic application rate may not exceed 10,000 gallons per acre per day for the system.
NR 206.08 Note
Note: Based upon the department's experience, the recommended range for the average hydraulic application rate is 2,000 to 5,000 gallons per acre per day based on a monthly average.
NR 206.08(3)(b)6.
6. The annual total nitrogen in the wastewater applied to the system shall be limited to the annual nitrogen need of the cover crop plus demonstrable denitrification occurring in the treatment system.
NR 206.08(3)(b)7.
7. The department may limit additional parameters as necessary to protect and maintain groundwater quality as required in
ch. NR 140.
NR 206.08(4)(b)1.1. The discharge to the overland flow system shall be alternately distributed to individual sections of the system in a regular load/rest cycle that allows sufficient resting to dry accumulated solids and maintain a complete grass cover.
NR 206.08(4)(b)2.
2. The hydraulic application rate shall be as defined in the management plan, developed according to
s. NR 206.07 (2) (h). The hydraulic application rate is expressed as a flow rate per unit width of slope.
NR 206.08(4)(b)3.
3. Hydraulic application rates shall be reduced substantially when the vegetative cover has not developed sufficiently to anchor the soil and create the filter mat necessary for effective wastewater treatment. This condition may occur during original or springtime system startup.
NR 206.08(4)(b)4.
4. The discharge of wastewater to an overland flow system shall be in accordance with a WPDES permit.
NR 206.08(4)(b)5.
5. The department may limit parameters to an overland flow system in order to protect and maintain groundwater quality as required in
ch. NR 140.
NR 206.08(5)
(5) All other land disposal systems shall be evaluated by the department on a case-by-case basis.
NR 206.08 History
History: Cr.
Register, March, 1985, No. 351, eff. 4-1-85; r. and recr.
Register, November, 1990, No. 419, eff. 12-1-90.
NR 206.09
NR 206.09 Wastewater monitoring requirements. NR 206.09(1)(1) Discharges to land disposal systems, except for large scale soil absorption systems, shall be monitored for total daily flow and at least monthly for total dissolved solids, chlorides, BOD
5, organic nitrogen, ammonia-nitrogen and nitrate plus nitrite nitrogen. For spray irrigation systems, fecal coliform bacteria monitoring may be included on a case-by-case basis. For large scale soil absorption systems, effluent shall be monitored for total daily flow, and at least quarterly for BOD
5, organic nitrogen, ammonia nitrogen, total dissolved solids and chlorides. The frequency
of flow monitoring and sampling and the type of samples shall be as specified in the WPDES.
NR 206.09(2)
(2) Influent to all treatment facilities subject to the monitoring provisions of
sub. (1) shall be monitored for total daily flow, and at least monthly for BOD
5 and organic nitrogen and ammonia-nitrogen. The frequency of flow monitoring and sampling and the type of samples shall be as specified in the WPDES permit. Any flow bypassing the treatment facility to the land disposal system shall be monitored at a minimum of once per bypass event for the parameters for which effluent monitoring is required or as determined by the department. Influent monitoring may be required on a case-by-case basis for large scale soil absorption systems.
NR 206.09(3)
(3) Monitoring for other pollutants parameters may be required on a case-by-case basis dependent on waste characteristics and their potential for groundwater contamination.
NR 206.09(4)
(4) Unless otherwise specified in the WPDES permit for a land disposal system:
NR 206.09(4)(a)
(a) The procedures for measuring flow and taking samples of discharges shall be those set forth in
ch. NR 218.
NR 206.09(4)(b)
(b) The methods of analysis for substances contained in discharges shall be those set forth in
ch. NR 219.
NR 206.09(4)(c)
(c) Sample analysis used for permit reporting shall be performed by a laboratory certified under
ch. NR 149.
NR 206.09 History
History: Cr.
Register, March, 1985, No. 351, eff. 4-1-85; r. and recr. (1) and (2), cr. (4) (c),
Register, November, 1990, No. 419, eff. 12-1-90.
NR 206.10(1)
(1)
Design criteria. The design criteria and construction standards for a groundwater monitoring well shall conform to
s. NR 110.25 (5) and
ch. NR 141.
NR 206.10(2)(a)(a) Approval of plans and specifications for groundwater monitoring wells installed after the treatment facility has been constructed is required for any well which is to be used as a permanent groundwater monitoring well.
NR 206.10(2)(b)
(b) If wells were installed prior to treatment facility construction, department approval for use of these wells as permanent groundwater monitoring wells is required and is conditional, based on documentation that the wells were constructed in conformance with
ch. NR 141.
NR 206.10(3)(a)(a) For systems approved on or before December 1, 1990, monitoring requirements shall be based on average daily flow.
NR 206.10(3)(b)
(b) For systems modified or approved after December 1, 1990, monitoring requirements shall be based on average daily flow.
NR 206.10(3)(c)
(c) If the system has a design or average daily flow less than 0.015 MGD, the department may require groundwater monitoring if there is reason to believe contamination of groundwater is occurring.
