NR 812.151(10)(b)1.1. The pipe shall be placed to the bottom of the drillhole and the grout shall be placed from the bottom up. NR 812.151(10)(b)2.2. The tremie pipe shall be kept submerged in the grout at all times during grouting. NR 812.151(10)(b)3.3. The tremie pipe may be pulled back during grouting as long as the end of the tremie pipe remains submerged in the grout. NR 812.151(11)(11) Fusion welding. Fusion welding connection for vertical heat exchange piping shall be done using socket fusion, saddle fusion or butt fusion type, in accordance with pipe manufacturer’s instructions or as referenced in ASTM D 2610, D 2683 and D 2657. Joint surfaces shall be clean and moisture free. NR 812.151(12)(12) Reporting. A heat exchange driller shall submit a report of the heat exchange drillhole project, on a form prescribed by the department, within 30 days following the date of completion of the project. NR 812.151(13)(13) Heat exchange fluids. Only department approved heat exchange fluids may be used in the piping placed in heat exchange drillholes. NR 812.151(14)(14) Filling and sealing. Unused heat exchange loops and drillholes shall be filled and sealed using the materials and methods specified in s. NR 812.26. NR 812.151 HistoryHistory: CR 18-095: r. and recr. Register June 2020 No. 774, eff. 7-1-20. NR 812.152NR 812.152 Construction requirements for potable high capacity wells, potable school wells, and wastewater treatment plant wells. Potable high capacity wells, potable school wells, and wastewater treatment plant wells shall be planned and constructed according to the location, approval, and general requirements speecified in ss. NR 812.08 to NR 812.12, and according to all of the following requirements: NR 812.152(1)(1) Minimum diameter. The minimum casing and lower drillhole diameter for potable high capacity wells, potable school wells and wastewater treatment plant shall meet the following requirements: NR 812.152(1)(a)(a) Four inches for wells completed in unconsolidated formations. NR 812.152(3)(3) Upper enlarged drillhole. An upper enlarged drillhole is required for all wells. An upper enlarged drillhole shall be constructed according to the following requirements: NR 812.152(3)(a)(a) An upper enlarged drillhole shall be a minimum of 3 inches larger than the outside diameter of welded casing pipe, or 3 inches larger than the diameter of the casing couplings, when couplings are used. NR 812.152(3)(b)(b) The upper enlarged drillhole shall be constructed to at least the minimum casing depth requirements specified in sub. (4). NR 812.152(3)(c)(c) The upper enlarged drillhole shall be maintained at full diameter for the entire depth by any of the following methods: NR 812.152(3)(c)2.2. Setting a temporary casing to the bottom of the drillhole, or to the top of bedrock. NR 812.152(4)(4) Casing depth. Minimum casing depths are measured from the ground surface. All wells shall be constructed with casing that extends to the minimum depth for the geologic formation they are completed in according to the all of the following requirements: NR 812.152(4)(a)1.1. Sixty feet or 20 feet below the static water level when the static water level is greater than 40 feet. NR 812.152(4)(a)2.2. One hundred feet, or 20 feet below the static water level when the static water level is greater than 80 feet, when the well is to supply water for a wastewater treatment plant and there is a treatment pond or lagoon or sludge beds on the property. NR 812.152(4)(b)1.1. Sixty feet or to the depth of bedrock when the top of bedrock is more than 60 feet below ground surface. NR 812.152(4)(b)2.2. One hundred feet when the well is to supply water for a wastewater treatment plant and there is a treatment pond or lagoon or sludge beds on the property. NR 812.152(5)(5) Grouting. The grouting of an annular space shall be accomplished according to all of the following requirements: