NR 812.42(4)(f) (f) When a below ground-grade reservoir or a buried pressure tank pit is to be abandoned, it shall be permanently filled and sealed when the well or drillhole is filled and sealed. The reservoir shall be filled according to the filling and sealing requirements specified in s. NR 812.26 (5) (m) for well pits.

NR 812.42(4)(g) (g) The owner shall permanently fill and seal a reservoir if any of the following apply:

NR 812.42(4)(g)1. 1. The location or construction of the reservoir does not meet the requirements of this chapter.

NR 812.42(4)(g)2. 2. It poses a hazard to health or safety.

NR 812.42(4)(g)3. 3. It has been taken out of service or has not been used for 2 or more years.

NR 812.42(4)(h) (h) A reservoir shall be maintained in a clean and sanitary condition and provide water free from coliform bacteria and free from contaminant levels in excess of the standards specified in s. NR 812.06.

NR 812.42(5) (5) Dug wells. An existing dug well may be continued in service only if it produces water free from coliform bacteria and free from contaminant levels in excess of the standards specified in s. NR 812.06. Use of dug wells is not recommended by the department. A dug well may not be reconstructed without approval under s. NR 812.09 (4) (m). Existing dug wells shall meet the following minimum construction requirements:

NR 812.42(5)(a) (a) Curbing. The curbing of every dug well shall be of watertight reinforced poured concrete or at least 3/16 inch thick steel curbing with watertight joints. Fieldstone curbing may not be used. The curbing shall extend above grade at least 8 inches and be protected from flooding. An open annular space may not exist around the dug well curbing.

NR 812.42(5)(b) (b) Depth. If the well was dug after June, 1975, the watertight curbing shall extend to a depth of at least 25 feet below ground surface and the well shall produce water free from coliform bacteria. If the well was dug prior to June, 1975, the watertight curbing shall extend to at least the 15-foot depth and the well shall produce water free from coliform bacteria.

NR 812.42(5)(c) (c) Cover. The dug well cover shall be of watertight, reinforced concrete at least 5 inches thick and wide enough to overlap the curbing by at least 2 inches. It shall provide a tight seal and be free of joints. A steel well casing pipe sleeve meeting the requirement for potable well casing pipe specified in s. NR 812.11 (6) shall extend watertight through the cover to provide access for installing the pump. The steel well casing pipe sleeve shall extend at least 8 inches above the cover and have an approved well cap or a one-piece well seal.

NR 812.42(5)(d) (d) Equipment location. Pumping equipment or attachments may not be installed for a dug well so that access to the interior of the well will be required for maintenance or repair.

NR 812.42(6) (6) Pump and pump discharge installations. Pump installations installed prior to February 1, 1991 shall conform to the following requirements:

NR 812.42(6)(a) (a) Residential up to three families. Installations for water supplies serving a maximum total of 3 families in residential units shall meet the following requirements:

NR 812.42(6)(a)1. 1. The subsurface connection to the well casing pipe may be made with an approved weld-on pitless adapter or with an approved pitless unit provided the adapter or unit is installed according to the requirements of s. NR 812.31.

NR 812.42(6)(a)2. 2.

NR 812.42(6)(a)2.a. a. Any buried suction pipe shall be contained in a sealed pressurized conduit or a nonpressurized conduit, if the nonpressurized conduit was installed before February 1, 1991 (Figures 12 and 13 of ch. NR 812 Appendix). The nonpressurized conduit shall meet the pipe requirements of Table B between the connection to the well casing pipe and a basement, or shall be properly connected to the well with an approved pitless adapter or pitless unit designed for and used with a concentric piping arrangement. Unprotected buried suction lines not enclosed in conduit may not be used.

NR 812.42 Note Note: Unprotected buried suction lines have never been allowed by the Wisconsin Well and Pump Code.

NR 812.42(6)(a)2.b. b. Nonpressurized conduits shall have been welded watertight or threaded watertight to the well casing pipe and shall be at least 4 inches in diameter and shall enter the basement such that the bottom of the conduit is at least 6 inches above the basement floor.

NR 812.42 Note Note: Nonpressurized conduits to protect buried suction lines were only allowed before February 1, 1991 and then only for installations serving three or fewer homes.

NR 812.42(6)(a)2.c. c. A nonpressurized conduit may extend at an angle up through a basement floor, or up through a concrete slab floor of a building having no basement, provided the lowest end of the conduit is at least 6 inches above the floor.

NR 812.42(6)(a)2.d. d. The basement end of a nonpressurized conduit shall be sealed with a watertight seal.

NR 812.42(6)(a)3. 3. Buried submersible pump discharge pipes connected to pitless adapters or pitless units shall conform to the requirements specified in s. NR 812.11 (6) for steel pipe or shall conform to the requirements in the “Pipe and Tubing for water services and private water mains” table in ch. SPS 384. This pipe shall be maintained under system pressure at all times. No check valve may be placed in the pump discharge line between a pitless adapter or unit and a pressure tank or other pressure vessel. The check valve shall be located either at the top of the submersible pump, in that portion of the discharge pipe within the well or on the spool of an approved spool-type pitless unit.

NR 812.42(6)(b) (b) Residential more than three families. Installations for non-community water systems and water systems serving more than 3 families in residential units except high capacity and school wells shall meet all of the following requirements:

NR 812.42(6)(b)1. 1. The subsurface connection to the well casing pipe may be made with a factory-assembled pitless unit provided the unit is approved and installed according to the requirements of s. NR 812.31.

NR 812.42(6)(b)2. 2. All suction pipe for off-set pump installations shall be enclosed in a sealed pressurized conduit between the connection to the well casing pipe and a basement, or shall be connected to the well with an approved factory-assembled pitless unit designed for and having a concentric pressurized piping arrangement. Unprotected buried suction lines or suction lines enclosed in nonpressurized conduits may not be used. The pipe for a pressurized conduit shall meet the requirements of Table B and shall enter the basement such that any pump suction pipe in the basement not enclosed in a pressurized conduit shall be at least 6 inches above the basement floor.

NR 812.42(6)(b)3. 3. Buried submersible pump discharge pipes connected to pitless units shall meet the requirements of sub. (6) (a) 3.

NR 812.42(6)(b)4. 4. When an existing off-set pump installation using a nonpressurized conduit has been or will be converted to a submersible pump installation, the nonpressurized conduit shall be completely eliminated by cutting off the well casing pipe below the nonpressurized conduit, extending the well casing pipe to at least 12 inches above grade in accordance with sub. (12) and installing pressurized discharge piping according to the requirements of ss. NR 812.28, 812.31, and 812.32 (4).

NR 812.42(6)(c) (c) School and high capacity wells. Pump installations for water supplies serving schools, and high capacity wells shall be provided with an above-ground discharge meeting the minimum requirements of s. NR 812.32.

NR 812.42(6)(d) (d) Pit pump location. A pump located in a conforming pit or alcove shall be installed to allow the sealing of the top of the well with an approved one-piece sanitary well seal.