NR 811.81(3)(3) Pumping stations which serve more than 50 living units shall be designed such that the peak demand can be met with the largest pump out of service. NR 811.81(4)(4) For pumps not directly supplied by an adjacent reservoir or elevated tank, the suction pressure shall be at least 35 psi when the pumps are supplying design flow rates. An automatic cutoff control shall be provided that will stop the pumps when the suction pressure falls below 20 psi. NR 811.81(5)(5) For pumps supplied by an adjacent but not physically connected reservoir or elevated tank, the suction pressure shall be at least 3 psi under all pumping conditions. An automatic cutoff control shall be provided that will stop the pumps when the suction pressure falls below 3 psi. NR 811.81(6)(6) For those stations servicing a boosted zone without elevated storage, one of the following shall be provided: NR 811.81(6)(a)(a) A continuously running pump to maintain pressure in the boosted zone. A small feed back line or other means shall be provided to prevent the pump from overheating. NR 811.81(6)(b)(b) A single speed pump and one or more hydro-pneumatic tanks with a total gross volume at least ten times the rated gallon per minute capacity of the pump. NR 811.81(6)(c)(c) A pump fitted with a 2 to 3 minute minimum run timer and one or more hydro-pneumatic tanks to prevent frequent pump cycling. NR 811.81(6)(d)(d) A pump controlled by a variable output control device along with one or more hydro-pneumatic tanks having a total gross volume meeting the requirements of s. NR 811.34 (6). NR 811.81 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10. NR 811.82NR 811.82 Storage requirements. Elevated storage is not required for a boosted pressure zone where the primary pressure zone can provide minimum pressures of 35 psi at street elevation in all areas of the boosted zone. Elevated storage facilities shall be provided for a boosted pressure zone serving more than 50 living units in any of the following situations: NR 811.82(1)(1) If the primary pressure zone cannot maintain pressures of 3 psi or greater at street elevation in all areas served by the booster pumps including situations where emergency power is provided. NR 811.82(2)(2) If the primary pressure zone provides pressures of 3 to 35 psi at street elevation in all areas served by the booster pumps and an emergency power source is not provided for the booster station. NR 811.82 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10. NR 811.83NR 811.83 Emergency power requirements. Boosted pressure zone emergency power installations shall meet the following requirements: NR 811.83(1)(1) Emergency power shall be provided if 50 or fewer living units are being served and the primary pressure zone cannot maintain positive pressures of 3 psi or greater at street elevation in all areas served by the booster pumps, and sufficient elevated storage is not provided. NR 811.83(2)(2) Emergency power shall be provided if more than 50 living units are being served and the primary pressure zone cannot maintain pressures of 20 psi or greater at street elevation in all areas served by the booster pumps, and sufficient elevated storage is not provided. NR 811.83(3)(3) Emergency power shall consist of a dedicated on-site engine-generator set with an automatic transfer switch capable of powering at minimum the domestic service pumps and station building demands. NR 811.83 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10. NR 811.84(1)(1) The on-off operation of the pumps and the system pressure at the booster station shall be monitored at one of the main waterworks pumping stations, other waterworks facility, or wherever the master control panel is located. At stations serving 50 or fewer living units, monitoring may be provided by a light or an audible alarm placed in a conspicuous location outside the station to indicate pump failure. A continuous recording pressure device may be provided. NR 811.84(2)(2) Pressure gauges shall be provided on the booster pump suction and discharge lines. NR 811.84(3)(3) A flow meter shall be provided, if practical, in the booster pump discharge line. Booster pump motors shall be provided with hour meters if a flow meter will not be installed. NR 811.84(4)(4) A metal smooth-end sampling faucet shall be installed on the combined booster pump discharge piping. NR 811.84(5)(5) The design shall provide for automatically bypassing the pumping units when the pumps are not operating. NR 811.84(6)(6) The design shall include piping and shut-off valves for manually bypassing the station when the station is out of service. NR 811.84(7)(7) If chemical addition is necessary, the station shall be provided with a separate chemical room meeting the requirements of subchs. VI and VII. NR 811.84(8)(8) General requirements for above grade stations are listed in subch. IV. NR 811.84(9)(9) Underground stations shall be equipped with heating, ventilation, and dehumidification equipment. Sump and sump pump equipment shall be provided unless a discharge to the ground surface can be provided. Access manways shall terminate a minimum of 24 inches above grade with an overlapping, gasketed, watertight, locking cover. Sump pump discharge and vent pipes shall be metal and terminate a minimum of 24 inches above grade in a downward facing U-bend with a 24-mesh corrosion resistant screen. Chemical addition equipment may not be installed in underground stations. NR 811.85NR 811.85 General. Provisions shall be made for proper disposal of all wastes from waterworks facilities including wastes from sanitary facilities, laboratories, and treatment plants. All waterworks facilities shall meet the general requirements of this section and the relevant sections of this subchapter, which contain standards to be utilized in meeting the requirements of ch. 283, Stats. The discharge of specific types of wastes shall be limited to those methods listed under this subchapter. If other treatment or disposal methods are proposed or the treatment results are uncertain, the department may require laboratory testing, pilot testing under s. NR 811.44, or full-scale testing to establish design parameters. In addition, water system waste disposal shall meet all of the following requirements: NR 811.85(1)(1) Discharge requirements. Waterworks wastewater sludge, and solid wastes generated in the drinking water treatment process that is not recycled within the waterworks or disposed of in a licensed landfill shall meet all of the following provisions: NR 811.85(1)(a)1.1. The indirect discharge of any pollutant from a waterworks facility into a publicly owned treatment works shall conform to all the applicable requirements under ch. NR 211. NR 811.85(1)(a)2.2. An equalization tank or lagoon shall be provided if it is necessary to prevent overloading the sewers, interference, or pass through at the publicly or privately owned treatment works. NR 811.85(1)(b)1.1. The discharge of any pollutant from a water treatment plant to a water of the state shall be in accordance with the limitations and terms contained within a WPDES permit issued for the discharge. The discharge of solely sanitary wastes to a POWTS, as allowed under s. NR 811.851, is exempt from this requirement. NR 811.85 NoteNote: The department’s wastewater program in the bureau of water quality is responsible for the issuance of WPDES permits for discharges from waterworks to a water of the state. Waterworks owners should contact the department’s district wastewater staff for WPDES permit application and administration.
NR 811.85(1)(b)2.2. The radionuclide content of the wastewater, including waste sludge, shall comply with s. NR 811.856. Any proposed land treatment system shall comply with the applicable requirements under ss. NR 204.07 and 214.18. NR 811.85 NoteNote: Uncontaminated lime sludge excludes any sludge containing radium-226, radium-228, or uranium and other contaminants that are regulated under a WPDES permit under ch. 283, Stats. NR 811.85(1)(b)4.4. The discharge of wastewater to a water of the state shall be separated from a well in accordance with the applicable separation distances under s. NR 811.12 (5) (d) 6. and 8. The department may apply additional limitations to the location of a discharge on a case-by-case basis if necessary for adequate protection of a groundwater or surface water source. NR 811.85(1)(c)1.1. All wastewater discharged to a holding tank shall be regularly pumped and hauled to a permitted wastewater treatment plant. NR 811.85(1)(c)2.2. The indirect discharge of any pollutant from a waterworks facility into a publicly owned treatment works shall conform to all the applicable requirements under ch. NR 211. The discharge shall not interfere with the operation of and effluent quality from a privately owned treatment works. NR 811.85(2)(2) Plan approval. With the exception of facilities defined solely as plumbing under s. 145.01 (10), Stats., a wastewater conveyance, treatment, storage, equalization, or discharge facility shall be reviewed and approved by the department prior to construction under s. 281.41, Stats. A wastewater conveyance, treatment, storage, or equalization structure shall meet the design requirements under this chapter and ch. NR 213. A land treatment system shall also meet applicable design requirements under ch. NR 214. NR 811.85 NoteNote: The department’s wastewater section in the bureau of water quality is responsible for the review of plans for wastewater facilities. Plans for water treatment plant alterations should be submitted to both the wastewater section and the public water engineering section.
NR 811.85 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: renum. 811.85 to 811.85 (intro.) and am., cr. (1), (2) Register January 2024 No. 817, eff. 2-1-24. NR 811.851NR 811.851 Sanitary wastes. Wastes from toilet facilities shall be discharged to a sanitary sewer system. The floor elevation of a building from which there is a discharge shall be constructed at least one foot above the rim of the nearest sanitary sewer manhole in accordance with s. NR 811.25 (1) (h) to prevent contamination from sewer backup. When a sanitary sewer system is not available, the department may approve the discharge to a holding tank or an individual POWTS if the installation meets ch. SPS 383 requirements and if the POWTS separation distances to a community water system well comply with the requirements under s. NR 811.12 (5) (d). A holding tank or POWTS shall meet the requirements under s. NR 811.25 (1) (h) 2. c. NR 811.852NR 811.852 Floor drainage. Floor drains in pump stations and treatment plants shall comply with the requirements of s. NR 811.25 (1) (h). NR 811.852 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10. NR 811.853NR 811.853 Backwash wastewater from iron and manganese filters. Iron and manganese filter backwash shall be discharged according to one of the following methods: NR 811.853(1)(1) Discharge to sanitary sewer. Backwash wastewater from iron and manganese removal filters may be discharged to a sanitary sewer subject to the requirements under s. NR 811.85 (1) (a). NR 811.853(2)(2) Discharge to sand filters. All of the following requirements apply when sand filters are used to treat backwash wastewater from iron and manganese removal filters: NR 811.853(2)(a)(a) Filters shall be designed for a maximum rate of 35 gallons per square foot per day except if testing indicates that higher rates will not cause excessive plugging of the media and a quality effluent can be maintained. Sufficient surface area shall be provided so that during any filtration cycle the wastewater depth over the media does not exceed 2 feet. The filters shall be sized to handle the entire backwash volume from all of the iron and manganese filters at the treatment plant unless the iron and manganese filters are washed on a rotating schedule. NR 811.853(2)(b)(b) No filter, regardless of the volume of water to be handled, may be smaller than 100 square feet in area. Multiple units may be necessary to facilitate cleaning. NR 811.853(2)(c)(c) The filter media shall consist of a minimum of 12 inches of sand, 3 to 4 inches of supporting small gravel or torpedo sand, and 9 inches of gravel in graded layers. All fines shall be removed from the media by washing. The filter sand shall have an effective size of 0.3 to 0.5 mm and a uniformity coefficient not exceeding 3.5. NR 811.853(2)(d)(d) An adequate underdrainage collection system shall be provided. Provision shall be made to allow for sampling the filter effluent. NR 811.853(2)(e)(e) A cover shall be provided which prevents freezing during the winter months. NR 811.853(2)(f)(f) The filter shall be located in an area not subject to flooding, and the site shall be graded to prevent ponding of surface runoff. Finished grade elevation shall be designed to facilitate maintenance, cleaning, and removal or replacement of surface sand. An overflow may not be provided. NR 811.853(2)(g)(g) The filtrate shall be discharged to a sanitary sewer, water of the state, or holding tank and shall meet the provisions under s. NR 811.85 (1). NR 811.853(3)(3) Discharge to lagoons. Lagoons used to settle backwash wastewater from iron and manganese removal filters shall meet all of the following design requirements: NR 811.853(3)(a)(a) Lagoons shall be designed with a volume which is 10 times the total quantity of wastewater discharged during any 24-hour period. NR 811.853(3)(b)(b) Lagoon length shall be 4 times the width, and the width shall be at least 3 times the depth. The minimum useable depth shall be 3 feet. NR 811.853(3)(c)(c) Adequate inlet and outlet devices shall be provided so that velocity currents are minimized. NR 811.853(3)(e)(e) The lagoon effluent shall be discharged to a sanitary sewer, water of the state, or holding tank and shall meet the provisions under s. NR 811.85 (1) or shall be returned to the water treatment plant in accordance with the requirements under s. NR 811.862. NR 811.853(4)(4) Discharge to detention tanks. Detention tanks used to settle backwash wastewater from iron and manganese removal filters shall meet all of the following design requirements: NR 811.853(4)(a)(a) Detention tanks shall be designed to maximize settling by means of inlet piping and baffling configurations. Tanks shall be of sufficient capacity to hold at least 2 complete backwash cycles. The floor shall be sloped to a sump and access manholes provided to facilitate cleaning. A cover shall be provided to prevent freezing. NR 811.853(4)(b)(b) A convenient means of sampling the effluent shall be provided. NR 811.853(4)(c)(c) The detention tank supernatant shall be discharged to a sanitary sewer, water of the state, or holding tank and shall meet the provisions under s. NR 811.85 (1) or shall be returned to the water treatment plant in accordance with the requirements under s. NR 811.862. If discharged to a water of the state, pumps shall be provided to discharge the supernatant over approximately a 24-hour period. NR 811.853(4)(d)(d) Settled sludge removed from detention tanks shall be disposed of at a wastewater treatment plant unless the department approves an alternate disposal location on a case-by-case basis. The disposal of sludge shall meet the applicable requirements under s. NR 811.85 (1). NR 811.853 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: cr. (intro.), am. (1), (2) (a), (d), r. and recr. (2) (g), am. (3) (b), r. and recr. (3) (d), cr. (3) (e), am. (4) (b), r. and recr. (4) (c), am. (4) (d) Register January 2024 No. 817, eff. 2-1-24. NR 811.854NR 811.854 Brine wastes from ion exchange plants. Brine wastes from ion exchange processes may be discharged to a water of the state subject to the requirements under s. NR 811.85 (1) (b). An equalization tank of sufficient size to allow brine discharge over at least a 24-hour period shall be provided. The department may approve a smaller tank or no equalization if the water system facility demonstrates to the department that reduced equalization is unnecessary to prevent toxicity to aquatic life. NR 811.854 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: r. and recr. Register January 2024 No. 817, eff. 2-1-24. NR 811.855NR 811.855 Wastewater from reverse osmosis plants. Reject, backwash, and concentrate wastewaters from reverse osmosis processes may be discharged to a water of the state subject to the requirements under s. NR 811.85 (1) (b). Chemical cleaning waste shall not be discharged to a water of the state. An equalization tank of sufficient size to allow discharge over at least a 24-hour period shall be provided for a surface water discharge. The department may approve a smaller tank or no equalization if the waterworks facility demonstrates to the department that reduced equalization is unnecessary to prevent toxicity to aquatic life. NR 811.855 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: r. and recr. Register January 2024 No. 817, eff. 2-1-24. NR 811.856NR 811.856 Water treatment plant wastewater radionuclide content compliance with the unity equation. Water treatment plant wastewater containing radium or uranium shall not be discharged to a sanitary sewer or to waters of the state unless all of the following requirements are met: NR 811.856(1)(1) Unity equation. The levels of radium and uranium in the wastewater shall meet the limits of the Unity Equation as calculated based upon the requirements of the department of health services under s. DHS 157.30 (3) and Appendix E of ch. DHS 157. NR 811.856(2)(a)(a) Unity equation calculations in accordance with sub. (1) shall be performed for water treatment plants treating wells with combined radium-226 and radium-228, uranium, or both, exceeding the maximum contaminant level. The department may require unity equation calculations on a case-by-case basis if other radionuclides may be of concern. NR 811.856(2)(b)(b) The water system owner or its consultant shall submit the Unity Equation assumptions and calculations to the department for review and approval before, or along with, the submission of plans and specifications to the department for the radionuclide removal water treatment equipment or plant. NR 811.856(3)(3) Corrective actions. Corrective action as approved by the department shall be taken, if necessary, to maintain the result of the Unity Equation calculations as less than one. NR 811.856 NoteNote: The department’s Public Water Supply Section located in Madison may be contacted to obtain a copy of DNR Application of DHS Radionuclide Wastewater Disposal Criteria for help in addressing Unity Equation issues.
NR 811.856 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; correction in (1) made under s. 13.92 (4) (b) 7., Stats., Register November 2010 No. 659; CR 22-074: r. and recr. (intro.), am. (2) (a) Register January 2024 No. 817, eff. 2-1-24. NR 811.857NR 811.857 Backwash wastewater from lime softening water treatment plants. Filter backwash wastewater from lime softening water treatment plants shall be disposed of by any of the following methods: NR 811.857(1)(1) Recycle. Returned to the inlet end of the plant in accordance with the requirements of s. NR 811.862. NR 811.857(2)(2) Discharge to a sanitary sewer. Lime softening backwash water may be discharged to a sanitary sewer system subject to the requirements under s. NR 811.85 (1) (a).
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