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)2.2. The well or drillhole poses a hazard to health or safety, or to groundwater. 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. NR 812.26(4)(a)5.5. The well is a seasonal well or high capacity irrigation well that has not been used for any water supply purpose for more than 3 consecutive years. NR 812.26(4)(a)6.6. The heat exchange drillhole will not be used as part of the heat exchange system. NR 812.26(4)(a)7.7. The pump installation is not operational, or it does not comply with the requirements of this chapter. NR 812.26(4)(b)(b) The department may require a well or drillhole owner to fill and seal a well or drillhole in any of the following situations: NR 812.26(4)(c)(c) A well driller or well constructor shall, no later than 30 days after receiving notice from the department, fill and seal a well that the well driller or well constructor constructed or reconstructed, in any of the following situations: NR 812.26(4)(c)1.1. The well construction or location does not comply with the minimum standards of this chapter at the time the well was constructed. NR 812.26(4)(c)2.2. The drillhole is an unsuccessful attempt to construct or reconstruct a well. NR 812.26(4)(d)(d) A heat exchange driller shall, no later than 30 days after receiving notice from the department, fill and seal a heat exchange drillhole that the heat exchange driller constructed, in any of the following situations: NR 812.26(4)(d)1.1. The heat exchange drillhole construction or location does not comply with the minimum standards of this chapter at the time it was constructed. NR 812.26(4)(d)2.2. The drillhole is an unsuccessful attempt to construct or reconstruct a heat exchange drillhole. NR 812.26(4)(e)(e) Any person who constructs a drillhole that is not a well or heat exchange drillhole shall fill and seal the drillhole at the completion of drilling and sampling activities. NR 812.26(4)(f)(f) The department may require any person who has filled and sealed a well or drillhole using a method or material or in a manner not in compliance with this section to take corrective action so that the well or drillhole is filled and sealed in a complying manner. NR 812.26(5)(a)(a) Filling and sealing prior to construction or demolition. Unless exempted under s. NR 123.23, any well or drillhole removed from service shall be filled and sealed prior to any demolition or construction work on the property. NR 812.26(5)(b)(b) Removal of obstructions prior to filling and sealing. All debris, pumps, piping, ungrouted liner pipe, and any other obstruction known to be in the well or drillhole shall be removed if possible before the well or drillhole is filled and sealed. When a pump is stuck within the well, a reasonable attempt shall be made using the best available technology to pull it out. If the pump cannot be pulled, a tremie pipe shall be placed in the well to a depth just above the top of the pump and neat cement grout shall be pumped in to entomb the pump and fill and seal the entire well. NR 812.26(5)(c)(c) Circulation of drilling mud in fractured formations. In a highly fractured or highly permeable geologic formation, sodium bentonite drilling mud may be circulated in the drillhole or in the well prior to the filling and sealing procedures. NR 812.26(5)(d)(d) Use of a tremie pipe. The sealing material to be used to fill and seal a well or drillhole greater than 3 inches in diameter shall be placed through a tremie pipe or by means of a dump bailer except when bentonite chips or bentonite pellets are used. Tremie pipe shall meet the requirements specified in s. NR 812.11 (2). The bottom end of the tremie pipe shall be submerged in the filling and sealing material as the grouting proceeds. NR 812.26(5)(e)(e) Wells or drillholes with inadequate grouting or sealing of the annular space. Wells or drillholes with inadequate grouting or sealing of the annular space outside the well casing pipe or liner shall be filled and sealed. Techniques are situation dependent and may include reaming a new annular space outside the well casing pipe, use of pressure grouting methods, or perforation of the well casing pipe. When perforation of the well casing or liner pipe is undertaken, it shall be done in accordance with the requirements specified in par. (i). NR 812.26(5)(f)(f) Termination of filling and sealing material. The well casing pipe and filling and sealing material may be terminated as much as 3 feet below the ground surface or to a depth below any future building foundation at the time of the filling and sealing procedure. NR 812.26(5)(g)(g) Perforation of casing or liner. Well casing or liners with ungrouted annular spaces that cannot be removed from the well or drillhole shall be perforated or ripped in place prior to filling and sealing. When an ungrouted casing or liner is perforated or ripped in place prior to filling and sealing, it shall be completed in accordance with all the following procedures: