NR 206.03(12)(12) “High groundwater level” means the higher of either the elevation to which the soil is saturated as observed as a free water surface in an unlined hole, or the elevation to which the soil has been seasonally or periodically saturated as indicated by soil color pattern throughout the soil profile. NR 206.03(13)(13) “Hydraulic application rate” means the average daily volume of effluent discharged to a designated acreage of land of the land application system during a calendar month or other period of time specified in a WPDES permit. The rate is calculated by dividing the total discharge volume for the month or period of time by the acreage of land and by the number of days in the month or period of time (usually expressed in units of gpad). For overland flow systems, the hydraulic application rate is expressed as flow rate per unit width of slope. NR 206.03(14)(14) “Hydraulic loading rate” means the average daily volume of effluent discharged to a land disposal system during a calendar month or other period of time specified in a WPDES permit for the discharge. The average is calculated by dividing the total discharge volume for the month or period of time by the number of days in the month or period of time. NR 206.03(15)(15) “Injection” means the subsurface emplacement of a fluid or waste. NR 206.03(16)(16) “Land disposal system” means a facility for disposing of liquid wastes consisting of: NR 206.03(17)(17) “Large scale soil absorption system” means a private sewage system or subsurface soil absorption system which has a design capacity of more than 12,000 gallons per day where design capacity is calculated in accordance with s. NR 200.03 (4). NR 206.03(18)(18) “Privately owned domestic wastewater treatment work” means facilities which treat domestic wastewater and which are owned and operated by non-municipal entities or enterprises such as mobile home parks, restaurants, hotels, motels, country clubs, etc., which are permitted under ch. 283, Stats. NR 206.03(20)(20) “Soil” means the unconsolidated material which overlies the bedrock. NR 206.03(21)(21) “Total Kjeldahl nitrogen” or “TKN” means the sum of ammonia nitrogen and organic nitrogen. NR 206.03(22)(22) “Total nitrogen” means the sum of nitrate plus nitrite nitrogen, ammonia nitrogen, and organic nitrogen. NR 206.03(24)(24) “Water table observation well” means any groundwater monitoring well whose screen intersects the water table, installed for the specific purpose of determining either the elevation of the water table or the physical, chemical, biological or radiological properties of groundwater at the water table or both. NR 206.03(25)(25) “WPDES permit” means a permit issued under the Wisconsin pollutant discharge elimination system. NR 206.03(26)(26) “Well” means any borehole or other excavation or opening in the ground deeper than it is wide constructed for the purpose of obtaining or monitoring groundwater. NR 206.03 HistoryHistory: Cr. Register, March, 1985, No. 351, eff. 4-1-85; r. (7), (12) and (17), renum. (1) to (6), (8) to (11) and (13) to (16) to be (3), (4), (7) to (10), (14) to (16), (18) to (20), (23) and (25) and am. (16), cr. (1), (2), (5), (6), (11) to (13), (17), (21), (22), (24) and (26), Register, November, 1990, No. 419, eff. 12-1-90; r. and recr. (17), Register, January, 2000, No. 529, eff. 2-1-00. NR 206.05NR 206.05 Compliance with effluent limitations and monitoring requirements. NR 206.05(1)(1) All new or modified land disposal systems approved on or after December 1, 1990 shall comply with the applicable effluent limits and monitoring requirements of this chapter and groundwater quality standards in ch. NR 140. NR 206.05(2)(2) All land disposal systems, except large scale soil absorption systems, approved or modified prior to December 1, 1990 shall comply with the effluent limits as shown in Table 1, and with the groundwater quality standards in ch. NR 140. NR 206.05(3)(3) All land disposal systems, except large scale soil absorption systems, approved prior to December 1, 1990 shall comply with the monitoring requirements described in s. NR 206.09 by January 1, 1994. NR 206.05(4)(4) Large scale soil absorption systems shall comply with the effluent monitoring requirements of this chapter and with the groundwater quality standards in ch. NR 140. Influent monitoring may be required on a case-by-case basis. NR 206.05(6)(6) All systems for which groundwater monitoring is required under s. NR 206.10 shall comply with the groundwater monitoring construction requirements of s. NR 110.25 and ch. NR 141. NR 206.05 HistoryHistory: Cr. Register, March, 1985, No. 351, eff. 4-1-85; r. and recr. Register, November, 1990, No. 419, eff. 12-1-90. NR 206.06(1)(1) If the owner of a proposed land disposal system feels that compliance with the monitoring requirements, discharge prohibitions and effluent limits of this chapter are impracticable, the reasons therefore shall be fully communicated in writing to the department. This communication shall set forth alternative requirements for which department approval is sought and all pertinent facts, data, reports, and studies supporting the imposition of such alternative requirements, along with supporting documentation on the ability of the system to meet ch. NR 140 standards or standards pursuant to the appropriate variances. NR 206.06(2)(2) If the department determines that compliance with the monitoring requirements, discharge prohibitions and effluent limits of this chapter would be impracticable in specific cases, it may approve alternative requirements which, in its opinion, are in substantial compliance with the requirements of this chapter and ch. NR 140. NR 206.06 HistoryHistory: Cr. Register, March, 1985, No. 351, eff. 4-1-85; am. Register, November, 1990, No. 419, eff. 12-1-90. NR 206.07NR 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 HistoryHistory: 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 206.08NR 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 BOD5 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)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, BOD5, 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 NoteNote: 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 NoteNote: 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.
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Department of Natural Resources (NR)
Chs. NR 200-299; Environmental Protection – Wisconsin Pollutant Discharge Elimination System
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