NR 811.12(14)(b)3. 3. Any materials used as drilling aids shall be removed from the annular opening prior to grouting.

NR 811.12(14)(b)4. 4. Prior to grouting through creviced formations, bentonite or similar approved materials shall be added to the annular opening in the manner indicated for grouting and circulated until the bentonite or other approved material flows to the ground surface.

NR 811.12(14)(b)5. 5. Grout shall be allowed to overflow from the annular opening until such time as the density is the same as that of the grout being placed. The specifications shall outline the method to be used to check the grout density and equipment shall be available on site to determine grout density.

NR 811.12(14)(b)6. 6. Standby grouting equipment for grouting annular openings, including a backup grout pump and tremie pipe meeting the material requirements of subd. 8., shall be on site during the grouting of all wells.

NR 811.12(14)(b)7. 7. The grout level shall be maintained above the bottom of any outer casing during the withdrawal procedure.

NR 811.12(14)(b)8. 8. Grout conductor, or tremie, pipes shall be metal pipe or a rubber-covered, fiber or steel braided, reinforced hose with a minimum pressure rating of 300 psi. Plastic pipe, including PVC pipe, shall not be used as a grout conductor pipe.

NR 811.12(14)(b)9. 9. The conductor pipe shall be completely withdrawn from the well prior to flushing excess grout from the conductor pipe when grouting down the annular space or shall be disconnected from the grout shoe or street elbow prior to flushing excess grout when grouting within the casing.

NR 811.12(14)(c) (c) Centering guides. Centering guides shall be installed on the protective casing in a manner to permit unobstructed flow and uniform thickness of grout within the annular space.

NR 811.12(14)(d) (d) Grout curing. Drilling operations or other work in the well, including development, may not be performed within 72 hours after the grouting of casings or liners. If the department approves the use of quick-setting cement, this period may be reduced to 24 hours. Use of quick setting cement shall be clearly indicated in the specifications submitted to the department.

NR 811.12(15) (15) Plumbness and alignment requirements.

NR 811.12(15)(a) (a) Every well constructed in rock and all screened wells greater than 100 feet in depth shall be tested for plumbness and alignment by the method outlined in AWWA Standard A100-20 dated July 1, 2020, which is incorporated by reference, or by an equivalent method. The test method shall be clearly stated in the specifications. The department may waive the requirement for plumbness and alignment testing for 6-inch diameter wells that will have a submersible well pump installed.

NR 811.12 Note Note: A copy of AWWA Standard A100-20 dated July 1, 2020, is available for inspection at the Legislative Reference Bureau and may be obtained for personal use from the American Water Works Association, https://awwa.org.

NR 811.12(15)(b) (b) Variance from the vertical of two-thirds the smallest inside diameter of that part of the well being tested per 100 feet of depth to the depth of the pump setting plus 25% may not be exceeded. Also, the well shall allow free passage of a 40-foot section of pipe or a dummy to the depth of the pump setting plus 25%. The outside diameter of the pipe or dummy used may not be more than 1/2 inch smaller than the diameter being tested.

NR 811.12(15)(c) (c) The department will not approve installation of well pumps in wells with kinks and bends which prevent setting a line shaft vertical turbine pump to the desired pump setting plus 25% unless the owner accepts the installation in writing.

NR 811.12(15)(d) (d) A summary and evaluation of the test results shall be submitted to the department prior to permanent pump approval for municipal wells and prior to the department approving the well to be placed in service for other-than-municipal community public wells.

NR 811.12(16) (16) Yield and drawdown test.

NR 811.12(16)(a) (a) A yield and drawdown test is required. The method to be used shall be clearly indicated in the plans and specifications.

NR 811.12(16)(b) (b) The yield and drawdown test shall be performed on every municipal or subdivision well for a period of at least 12 consecutive hours. For non-subdivision other-than-municipal water system wells, the yield and drawdown test shall be performed for a period of at least 4 consecutive hours. In any case, the test shall be performed at a rate no less than the anticipated pumping capacity and for the duration necessary for the water level to stabilize at the anticipated pumping capacity.

NR 811.12(16)(c) (c) The test shall include pumping a minimum of 4 hours at a rate equal to the capacity anticipated for the permanent well pump.

NR 811.12(16)(d) (d) Water depth measurements shall be made at a frequency sufficient to evaluate the production efficiency and recovery rate of the well.

NR 811.12(16)(e) (e) All of the following data regarding the yield and drawdown test shall be submitted to the department:

NR 811.12(16)(e)1. 1. Date and time the test was started.

NR 811.12(16)(e)2. 2. Static water level immediately prior to starting the test.

NR 811.12(16)(e)3. 3. Gallon per minute pumping rate.

NR 811.12(16)(e)4. 4. Drawdown in feet during the test.

NR 811.12(16)(e)5. 5. Date and time the pumping water level was measured.

NR 811.12(16)(e)6. 6. Specific capacity in gpm/ft.

NR 811.12(16)(e)7. 7. Recovery water levels including date and time measured.

NR 811.12(16)(e)8. 8. Depth of pump setting.