NR 812.25(3)(a)3.3. The spring water flows from an underground source having enough overburden so that a horizontal plane extending back into the slope of the hill 100 feet will be at least 25 feet below the ground surface.

NR 812.25(3)(a)4.4. The spring meets the minimum separation distance requirements from potential contamination sources specified in s. NR 812.08.

NR 812.25(3)(b)(b) Construction. The spring outlet shall be completely protected against the entrance of surface water runoff, insects, rodents, and contaminants and shall be constructed to meet all of the following requirements:

NR 812.25(3)(b)1.1. A poured concrete box structure reinforced with 3/8-inch metal bars each way shall be constructed to house the spring outlet. This spring box shall meet all of the following minimum construction requirements:

NR 812.25(3)(b)1.a.a. Five-inch thick walls and roof with no cracks or holes, except for the overflow pipe in the wall and the access openings in the roof.

NR 812.25(3)(b)1.c.c. A 20-inch diameter round, or a 20-inch square access opening in the roof with a 4-inch thick concrete curbing wall that extends 8 inches above the roof.

NR 812.25(3)(b)1.d.d. An overlapping, tight-fitting, shoebox-type cover with 4-inch high skirted sides, constructed from welded sheet steel, to cover the access opening.

NR 812.25(3)(b)1.e.e. A 4-inch diameter or larger steel pipe sleeve, comprising a section of well casing pipe conforming to s. NR 812.11 (6) extending through the roof to a point at least 12 inches above the roof for the passage of the pump suction and discharge pipe or a service pipe from a pressure tank. The steel pipe sleeve shall be provided with a one-piece top plate sanitary well seal.

NR 812.25(3)(b)1.f.f. An overflow pipe with a screened outlet that terminates at least 2 pipe diameters above the maximum water level at its discharge point.

NR 812.25(3)(b)2.2. Buried discharge pipe from the spring, from a pump or any service pipes from a pressure tank shall be maintained under positive gauge pressure at all times.

NR 812.25(3)(b)3.3. When the pump, pressure tank, or both, are installed above the spring outlet box, an insulated housing shall be provided for frost protection.

NR 812.25(3)(c)(c) Water quality. The spring shall be capable of producing water that is continuously free from coliform bacteria and free of contaminant levels in excess of the standards specified in s. NR 812.06.

NR 812.26(1)(1) Applicability. The requirements of this section apply to all wells and drillholes not regulated under ch. NR 132 or s. NR 141.25. An individual who fills and seals a well or drillhole shall complete the work in accordance with all of the requirements of this section.

NR 812.26(2)(2) Protection of groundwater quality. The filling and sealing of noncomplying, unused wells or wells with contaminant levels in excess of the standards specified in s. NR 812.06 or drillholes and noncomplying water systems is a crucial step in the protection of the local groundwater quality. Wells or drillholes, especially those with structural defects, may act as conduits for the vertical movement of contamination from or near the ground surface into the groundwater or from one aquifer to another.

NR 812.26(3)(3) License requirement. An individual who fills and seals a well shall be a licensed water well driller or licensed pump installer and an individual who fills and seals a heat exchange drillhole shall be a licensed heat exchange driller, except that a license is not required for any of the following individuals provided all other requirements of this section are met:

NR 812.26(3)(a)(a) An individual who is employed by a licensed water well driller, licensed pump installer or a person registered as a business to perform well drilling or pump installing may fill and seal a well.

NR 812.26(3)(b)(b) An individual who is a water system operator certified under s. 281.17 (3), Stats., and the well is within the service area of the local governmental water system for which the individual works may fill and seal a well.

NR 812.26(3)(c)(c) An individual who is employed by a licensed heat exchange driller or a person registered as a business to perform heat exchange drilling may fill and seal a heat exchange drillhole.

NR 812.26(3)(d)(d) An individual who is filling and sealing a drillhole that was not constructed to obtain groundwater or install a heat exchange loop.

NR 812.26(4)(4) Criteria for filling and sealing.

NR 812.26(4)(a)(a) A well or drillhole owner shall hire an individual who meets the license requirements of sub. (3) to fill and seal a well or drillhole in any of the following situations:

NR 812.26(4)(a)1.1. The well water is contaminated with biological, bacteriological, viral, or parasitic agents and 3 attempts at batch chlorination by a well driller or pump installer fail to eliminate the problem.

NR 812.26(4)(a)3.3. The well or heat exchange drillhole construction or location does not comply with the minimum standards of this chapter.

NR 812.26(4)(a)4.4. Except as provided in subd. 5., the well has not been used for any water supply purpose for more than 90 days.