NR 214.12(3)(d)(d) The average concentration of BOD5 discharged to an absorption pond system shall be restricted to the amount that can be removed in the treatment system. NR 214.12(3)(e)(e) The hydraulic application rate shall be established based on hydrogeologic conditions, soil texture, soil permeability and waste characteristics. Systems which are to receive more than 10,000 gallons per acre per day are required to perform additional soil testing requirements as specified in s. NR 214.20 (7). NR 214.12(3)(f)(f) Discharge to the system shall be limited so that the discharge volume combined with the precipitation from a 10-year frequency, 24-hour duration rainfall event does not reduce the available freeboard to less than one foot below the top of the dike. NR 214.12(3)(g)(g) No discharge to the system may have physical or chemical characteristics which prevent the proper operation of the system. NR 214.12(4)(a)(a) The discharge to each absorption pond cell shall be monitored for total daily discharge volume. NR 214.12(4)(b)(b) The department may require in a WPDES permit that the discharge be monitored for BOD5, total suspended solids, forms of nitrogen, chloride, metals or any other pollutant that may be present. The department shall select the pollutants to be monitored and the required frequency of monitoring on a case-by-case basis by considering the potential public health impacts, probable environmental impact, soil and geologic conditions, past operating performance, concentrations and characteristics of pollutants in the discharge and other relevant information. NR 214.12(4)(c)(c) The department may require electronic or paper submittal of discharge monitoring reports and land application forms. NR 214.12(5)(a)(a) The absorption pond cells shall be loaded intermittently to allow sufficient resting periods to maintain the absorptive capacity of the soil. NR 214.12(5)(b)(b) Management plan. The department shall require each absorption pond system owner or operator to submit a management plan for optimizing treatment system performance and demonstrating compliance with the requirements of this chapter. Following approval by the department, the treatment system shall be operated in conformance with the management plan. If the facility wishes to operate differently than specified in the approved plan, a written request shall be submitted to the department for approval to amend the management plan. The plan shall specify information on pretreatment processes, load and rest schedules, scheduled maintenance, weed control and removal, operational strategies for periods of adverse weather, monitoring procedures and any other pertinent information. NR 214.12(6)(6) Soil investigation and groundwater monitoring requirements. The soil investigation and groundwater monitoring requirements for absorption pond systems are specified in ss. NR 214.20 and 214.21. NR 214.12 HistoryHistory: Cr. Register, June, 1990, No. 414, eff. 7-1-90; CR 09-123: cr. (4) (c) Register July 2010 No. 655, eff. 8-1-10. NR 214.13(1)(a)(a) The ridge and furrow system shall be located at least 500 feet from the nearest inhabited dwelling, except that this distance may be reduced with the written consent of any affected owners and occupants. The department may require a greater distance depending on the potential for aesthetic and public health impacts. NR 214.13(1)(b)(b) The ridge and furrow system shall be located at least 1,000 feet from a well serving a community public water supply system and at least 250 feet from other potable water supply wells. NR 214.13(1)(c)(c) The bottom of the furrows shall be at least 5 feet above bedrock and groundwater. NR 214.13(1)(d)(d) The system may not be located in the floodway as specified in ch. NR 116. Any system located in the floodplain shall conform to ch. NR 116 and may not be operated when the floodplain is flooded. NR 214.13(2)(a)(a) Ridge and furrow systems shall be constructed on sites with soils having 50% or more of the soil particles passing a No. 200 sieve, except that coarser textured soils may be approved on a case-by-case basis depending on system design and wastewater strength. Suitable soils shall extend at least 3 feet below the base grade of the furrow bottoms. NR 214.13(2)(b)(b) The system shall consist of at least 2 cells which can be alternately loaded and rested, unless there is sufficient storage or pretreatment to allow loading and resting of a single cell. NR 214.13(2)(c)(c) The system shall be sized and constructed in order to allow sufficient resting to allow soil conditions to become unsaturated and aerobic prior to being loaded. NR 214.13(2)(d)(d) The shape of each ridge and furrow cell within the system shall be such that a minimum of soil disturbance is necessary to form the system. NR 214.13(2)(e)(e) The wastewater distribution system shall be constructed so that individual cells within the system can be taken out of service for resting without interrupting the discharge to the remaining cells. NR 214.13(2)(f)(f) The ridge and furrow system shall be constructed in a manner which provides equal liquid distribution during loading of each cell. The header ditch shall be designed to allow complete drainage after each wastewater loading or lined to prevent wastewater seepage. The header ditch drainage and the grading of the furrows for equal liquid distribution shall be tested before seeding the ridges with grasses. NR 214.13(2)(g)(g) All outside embankments and dikes may not be steeper than 3 horizontal to one vertical. Inside embankments and dikes may not be steeper than 2 horizontal to one vertical. All embankments and dikes shall be properly seeded with perennial grasses to prevent erosion. NR 214.13(2)(h)(h) All ridge tops shall be a minimum of 6 feet wide to allow mechanical removal of grasses. NR 214.13(2)(i)(i) The furrows of the ridge and furrow system shall be one foot deep and one foot wide at the furrow bottom.