NR 811.78(3)
(3) Hoses may not be contaminated by contact with the ground.
NR 811.78 Note
Note: It is recommended that a water meter be installed on the piping at all water loading stations to record water usage. It is also recommended that a free air break be installed in place of installing a reduced pressure principle backflow preventer.
NR 811.78 History
History: 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 December 2011 No. 672.
NR 811.79
NR 811.79
General. If the storage or primary pumping facilities cannot provide a minimum static pressure of 35 psi throughout the distribution system at street elevation, it shall be necessary to create a boosted pressure zone to serve those portions of the system. The use of pressure boosting systems on individual service lines shall be limited to a maximum of 10 individual systems in any given service area. The minimum static water pressure at street elevation shall be 20 psi in order for individual pressure boosting systems to be installed. Individual pressure boosting systems shall be owned and maintained by the water system owner. Booster station design shall be in accordance with this subchapter.
NR 811.79 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.80(1)(1) Pumps shall take suction from a reservoir, a water main adjacent to a reservoir, or elevated tank, where possible. If necessary, pumps can take suction from a distribution system water main if the installation complies with the requirements of this subchapter.
NR 811.80(2)
(2) For pumps not directly supplied by a reservoir or elevated tank, the suction pressure shall be at least 35 psi when the pumps are supplying design flow rates.
NR 811.80(3)
(3) Underground installations shall be permitted only if gravity drainage to the ground surface of large volumes of water from the vault can be provided or if the pumps and drivers are protected from damage by water or can be readily replaced. The department may waive the gravity drainage requirement if a minimum of 20 psi can be maintained at street elevation in the boosted zone by the main zone when the station is out of service or if sufficient elevated storage or alternate supply exists within the booster zone. The drain line may not discharge to a storm or sanitary sewer.
NR 811.80(4)
(4) In-line submersible pumps may be installed below the ground surface in a watertight installation. Provision shall be made for operational monitoring, pressure monitoring, flow metering, water sampling, and isolation valves. The pumps shall be accessible for servicing and repairs.
NR 811.80(5)
(5) Electrical equipment shall be installed above ground except if determined unnecessary by the department to meet the other requirements in this chapter.
NR 811.80(6)
(6) Buried stations may not be installed beneath roadways or in a floodplain.
NR 811.80 Note
Note: Refer to ch.
NR 116 for floodplain definitions.
NR 811.80 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.81(1)
(1) The booster pumps shall maintain static pressures in the area served within the range of 35 to 100 psi under normal operating conditions.
NR 811.81(2)
(2) The pump capacities for domestic service only shall be as established in Figure No. 1 in the Appendix, or as justified by additional engineering studies. Fire protection shall be provided if feasible and will require additional engineering studies.
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 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.82
NR 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 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.83
NR 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 History
History: 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, 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 811.84 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.85
NR 811.85
General. The discharge of pollutants from a waterworks facility into the waters of the state or into a publicly owned treatment works, as those terms are defined in s.
283.01, Stats., shall conform to all the applicable requirements of
ch. 283, Stats., and the rules adopted under
ch. 283, Stats. Provisions shall be made for proper disposal of all wastes from waterworks facilities. Wastes may be from sanitary facilities, laboratories, or treatment plants. If new methods are proposed or the treatment results are uncertain, the department may require laboratory, pilot, or full-scale testing to establish design parameters.
Sections NR 811.853 to
811.862 contain general standards to be utilized in meeting the requirements of
ch. 283, Stats. System owners proposing discharges other than to already permitted wastewater treatment plants shall obtain a WPDES permit.
NR 811.85 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.851
NR 811.851
Sanitary wastes. Wastes from toilet facilities shall be discharged to a sanitary sewer system. The floor elevation to 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. Where a sanitary sewer system is not available, the installation of an individual POWTS may be approved by the department if the installation meets
ch. SPS 383 requirements and if the POWTS separation distances to a community water system well shall comply with the requirements of
s. NR 811.12 (5) (d).
NR 811.851 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10; correction made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672.
NR 811.852
NR 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 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.853
NR 811.853
Backwash wastewater from iron and manganese filters. NR 811.853(1)(1)
Discharge to sanitary sewer. Backwash wastewater from iron and manganese removal filters may be discharged to a sanitary sewer if the discharge will not overload the facilities or adversely affect the wastewater treatment process. The radionuclide content of the wastewater shall comply with
s. NR 811.856. An equalization tank shall be provided when it is necessary to prevent overloading the sewers or wastewater treatment plant.
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 filters at the treatment plant unless the 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 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(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.
NR 811.853(3)(c)
(c) Adequate inlet and outlet devices shall be provided so that velocity currents are minimized.
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) Pumps shall be provided to discharge the decant water to a storm sewer or receiving watercourse over approximately a 24-hour period. A convenient means of sampling the effluent shall be provided. Any discharge requires a WPDES permit. The radionuclide content of the wastewater shall comply with
s. NR 811.856.
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.
NR 811.853 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.854
NR 811.854
Brine wastes from ion exchange plants. The department may allow brine wastes to be discharged to a sanitary sewer system or to a watercourse if sufficient flow is available to provide adequate dilution to meet water quality or effluent standards. Dilution in streams shall be based on the 7-day low flow for the previous 10-year period. Except if discharging to large waterways or sewerage systems that will not be overloaded by the discharge, the minimum requirement shall be an equalization tank of sufficient size to allow brine discharge over a 24-hour period. The radionuclide content of the wastewater shall comply with
s. NR 811.856.
NR 811.854 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.855
NR 811.855
Wastewater from reverse osmosis plants. The department may allow reject wastewater from reverse osmosis membranes to be discharged to a sanitary sewer system or to a watercourse if sufficient flow is available to provide adequate dilution to meet water quality or effluent standards. Dilution in streams shall be based on the 7-day low flow for the previous 10-year period. Except if discharging to large waterways or sewerage systems that will not be overloaded by the discharge, the minimum requirement shall be an equalization tank of sufficient size to allow reject wastewater discharge over a 24-hour period. The radionuclide content of the wastewater shall comply with
s. NR 811.856.
NR 811.855 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 811.856
NR 811.856
Water treatment plant wastewater radionuclide content compliance with the unity equation. Levels of radium and uranium in water treatment plant wastewater to be discharged to a sanitary sewer or to surface water shall meet all of the following requirements:
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 shall be performed for water treatment plants treating wells with combined radium-226 and radium-228, uranium, or both exceeding the maximum contaminant level unless required by the department in individual cases or if other less common radionuclide elements 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 Note
Note: 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 History
History: 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.
NR 811.857
NR 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:
