NR 812.26(6)(c)2. 2. Rubber-covered hose reinforced with braided fiber or steel
and rated for at least 300 psi, or
NR 812.26(6)(c)3. 3. For use at depths less than 100 feet, thermoplastic pipe
rated for at least 160 psi including:
NR 812.26(6)(c)3.a. a. Polyvinyl chloride (PVC);
NR 812.26(6)(c)3.b. b. Chlorinated polyvinyl chloride (CPVC);
NR 812.26(6)(c)3.c. c. Polyethylene (PE);
NR 812.26(6)(c)3.d. d. Polybutylene (PB); and
NR 812.26(6)(c)3.e. e. Acrylonitrile butadiene styrene (ABS).
NR 812.26(6)(d) (d) The bottom end of the conductor pipe shall be submerged in the filling and sealing material at all times, except when an alternate procedure is approved by the department.
NR 812.26(6)(e) (e) The flow from a flowing well or drillhole shall be reduced as much as possible with a packer by extending the well casing pipe or by other approved means including those depicted in figures 20 to 22 before it is filled and sealed.
NR 812.26(6)(f) (f) Filling and sealing of wells or drillholes with inadequate grouting or sealing of the annular space outside the well casing pipe or liner shall be performed to ensure complete sealing of the annular space. 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 a manner according to par. (h).
NR 812.26(6)(g) (g) 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(6)(h) (h) When an ungrouted well casing pipe or liner cannot be pulled, it shall be perforated or ripped in place prior the filling and sealing according to the following procedures:
NR 812.26(6)(h)1. 1. The casing pipe or liner shall be perforated using projectiles fired perpendicular to the length of the string of pipe. The perforations shall extend completely through the casing or liner pipe. As an alternative the casing pipe or liner may be vertically ripped.
NR 812.26(6)(h)2. 2. Four perforation shots or one rip shall be provided for each 5-feet of casing or liner.
NR 812.26(6)(h)3. 3. Each perforation shot shall be a minimum of 0.4 inches in diameter. Each rip shall have a minimum width of 0.25 inches and a minimum length of 12 inches.
NR 812.26(6)(h)4. 4. The orientation of each successive perforation shot or rip shall be rotated by 90 degrees along the string of pipe.
NR 812.26(6)(h)5. 5. After the well casing or liner has been perforated or ripped, the well shall be completely filled with neat cement from the bottom up to the ground surface. The well shall be filled both inside and outside the string of casing or liner pipe using a pressure grouting method in accordance with the requirements of s. NR 812.20
NR 812.26(6)(i) (i) When a well has a gravel pack that extends up to or within 20 feet of the ground surface, at least the top 20 feet of it shall be jetted out or removed in some other manner. Once the gravel pack has been removed the open annular space shall be filled and sealed with neat cement grout or concrete applied with a pressure method injected through a conductor (tremie) pipe.
NR 812.26(7) (7)Filling & sealing of wells and drillholes, methods, and materials.
NR 812.26(7)(a)(a) Methods. Once obstructions have been removed from a well or a drillhole, it shall be filled and sealed, from the bottom up, with the materials specified in this paragraph and in Table C with the use of a conductor (tremie) pipe, except where the use of a conductor pipe is specifically exempted, by using one of the following methods:
NR 812.26(7)(a)1. 1. `Wells and drillholes completed in unconsolidated formations'.
NR 812.26(7)(a)1.a.a. Drilled wells and drillholes or driven-point wells larger than 3 inches in diameter in unconsolidated formations shall be filled and sealed with neat cement grout, concrete (sand-cement) grout, concrete or with department-approved bentonite chips as provided and specified in subd. 3. for wells 4 inches or larger in diameter.
NR 812.26(7)(a)1.b. b. Wells and drillholes less than or equal to 3 inches in diameter completed in unconsolidated formations shall be filled and sealed with neat cement grout which may be poured or pumped down the drive pipe or drillhole. The use of a conductor pipe is not required.
NR 812.26(7)(a)2. 2. `Filling and sealing bedrock wells and drillholes'. Wells and drillholes completed in bedrock formations shall be completely filled and sealed from the bottom up with neat cement grout, concrete (sand-cement) grout, concrete or approved bentonite chips as provided in subd. 3. As an alternative for uncontaminated bedrock wells and drillholes deeper than 250 feet, chlorinated, sand-free pea gravel may be used to fill and seal the well or drillhole from the bottom up to 20 feet below the bottom of the casing pipe, or up to the 250-foot depth, whichever is deeper. This alternative may be used provided that for wells having drillholes extending through the Maquoketa Shale formation, a neat cement grout, concrete or bentonite chip plug at least 40 feet thick is placed and centered at the contact surface between the Maquoketa Shale and adjacent geologic formations, both above and below. Additionally, a neat cement grout, concrete or bentonite chip plug at least 40 feet thick shall be placed and centered at the top of the uppermost Cambrian Sandstone formation and at the top of the Eau Claire Formation of the Cambrian Sandstone whenever these layers are present in the open bedrock drillhole. When pea gravel is used for this alternative, it may be poured without the use of a conductor pipe provided the well is sounded at 50-foot intervals to ensure that bridging of the gravel in the well does not occur.
NR 812.26(7)(a)3. 3. `Use of bentonite chips to fill and seal wells and drillholes'. Approved bentonite chips may be used to fill and seal both unconsolidated formation and bedrock wells and drillholes with the following restrictions:
NR 812.26(7)(a)3.a. a. For wells and drillholes 4-inch diameter and larger the total depth may not be deeper than 500 feet and the number of feet of standing water in the well or drillhole may not be more than 350 feet. As an alternative for uncontaminated wells and drillholes deeper than 250 feet, chlorinated, sand-free pea gravel may be used to fill and seal the well or drillhole from the bottom up to 20 feet below the bottom of the casing pipe, or up to the 250-foot depth, whichever is deeper. This alternative may be used provided that for wells or drillholes extending through the Maquoketa Shale formation, a bentonite chip plug at least 40 feet thick is placed and centered at the contact surfaces between the adjacent geologic formations, both above and below. Additionally, a neat cement grout, concrete or bentonite chip plug at least 40 feet thick shall be placed and centered at the top of the uppermost Cambrian Sandstone formation and at the top of the Eau Claire Formation of the Cambrian Sandstone whenever these layers are present in the open bedrock drillhole. When pea gravel is used for this alternative, it may be poured without the use of a conductor pipe provided the well is sounded at 50-foot intervals to ensure that bridging of the gravel in the well does not occur.
NR 812.26(7)(a)3.b. b. Not allowed for wells and drillholes less than 4-inch diameter, and
NR 812.26(7)(a)3.c. c. Not allowed for any well or drillhole filled with drilling mud or bentonite slurry.
NR 812.26(7)(a)3.d. d. Fine particles and dust, typically present in the bags of chips, shall be prevented from entering the well by pouring the chips across a coarse-mesh screen such that they tumble under their own weight across the screen before falling into the well.
NR 812.26(7)(a)3.e. e. The chips shall be poured at a rate such that a 50-pound bag is emptied in a time period not less than 3 minutes. Once the chips rise above the water table, the rate of pour may be increased.
NR 812.26(7)(a)3.f. f. The depth of chips shall be monitored during the filling process, at a minimum of once every calculated 10 bags, to ensure the chips are not bridging in the well or drillhole. Any bridge of the chips shall be removed.
NR 812.26(7)(a)3.g. g. Water from a clean, bacteriologically safe and uncontaminated source shall be poured into the well in order to hydrate the chips. Water shall be introduced until the water level rises to the top of the well casing and the well will not accept any additional water at the time the individual who performs the filling and sealing operation leaves the site.
NR 812.26(7)(a)4. 4. `Filling and sealing dug and bored wells'.
NR 812.26(7)(a)4.a.a. Dug or bored wells shall have the cover removed and the top 5 feet of curbing or concrete wall removed. Rock curbing may be caved into the drillhole as the well is being sealed only if done in a manner to prevent bridging. The well shall be filled and sealed using clean clay or silt, clean native soil, approved bentonite chips, concrete, concrete (sand-cement) grout or neat cement grout if constructed in unconsolidated formations.
NR 812.26(7)(a)4.b. b. Dug wells and drillholes constructed partially or completely into bedrock shall be filled and sealed with neat cement grout, concrete (sand-cement) grout, concrete or approved bentonite chips to a point at least 2 feet above the top of the bedrock. The remainder of the well or drillhole may be filled and sealed using any of the materials listed in subd. 4. a.
NR 812.26(7)(a)4.c. c. Dug or bored wells 18 inches in diameter and smaller shall be filled and sealed by means of a conductor (tremie) pipe, except when bentonite chips are used as specified in subd. 3. or when clean clay or silt or clean native soil is used and the dug or bored well is 25 feet deep or less.
NR 812.26(7)(a)5. 5. `Well pits'. When a well terminating in a pit is filled and sealed, the pit shall also be filled and sealed except when the pit is a subsurface pumproom (alcove) adjoining a basement. When a well terminating in a pit is extended above grade, the pit shall be filled and sealed. Pits shall be properly filled and sealed by first removing from the pit, all water system features, including but not limited to the pressure tank, pump, discharge piping, electrical wiring and conduit, any treatment equipment, and then by perforating the floor, knocking out or perforating one wall with several holes and filling and sealing the pit with clean native soil less permeable than the soil surrounding the pit. If the pit will only be used for the purpose of housing valves and the pit complies with NR 812.36 (1), the pit may be kept.
NR 812.26(7)(a)6. 6. `Non-pressure conduits'. When wells having non-pressure conduits are filled and sealed, the basement end of the conduit shall be permanently sealed with a watertight cap or seal.
NR 812.26(7)(a)7. 7. `Filling heat exchange drillholes'.
NR 812.26(7)(a)7.a.a. If the loops for a heat exchange drillhole have not been grouted in place and can be removed from the drillhole, then the loops shall be removed and the drillhole shall be filled with grout.
NR 812.26(7)(a)7.b. b. If the loops for a heat exchange drillhole have been grouted in place and cannot be removed from the drillhole, then the loops shall be evacuated of all fluids and grout shall be pumped into the loops. The drillhole shall be grouted. The loops may be left in place after the grouting procedure or may be cut off below ground surface.
- See PDF for diagram PDFFigure 20. Inflatable packer method for permanently abandoning a flowing well.
- See PDF for diagram PDFFigure 21. Method for reducing flow in a flowing well by extending the well casing pipe before permanently abandoning the well.
- See PDF for diagram PDFFigure 22. Method for reducing flow in a flowing well by first adding gravel to the bottom before permanently abandoning the well.
NR 812.26(7)(b) (b) Materials.
NR 812.26(7)(b)1.1. Neat cement grout or concrete (sand-cement) grout as described in s. NR 812.20 (1), or approved bentonite chips shall be used to fill and seal wells and drillholes where the use of such materials are required in this section. The grout mixture shall be measured with a mud balance and shall have a slurry weight of at least 15.2 pounds per gallon unless powdered bentonite is added. Approved powdered bentonite may be added to the neat cement grout mixture, using a ratio of up to 5 pounds of bentonite per 94-pound bag of cement. When added, the resulting mixture shall meet the specifications of Table VI. Bentonite used for this purpose shall be 90-barrel per ton yield meeting the specifications of API 13A, Sec. 9. High yield drilling mud bentonite, also known as beneficiated bentonite, may not be used for this purpose. Any other ingredients or additives, to increase fluidity, control shrinkage or time of set may only be used with approval.
Table VI
(To Be Used When Adding Approved Powdered Bentonite to
Neat Cement Grout for the Purpose of Filling and Sealing a Well) - See PDF for table PDF
NR 812.26 Note Note: Note: Table VI is based on Halliburton Cementing Tables
NR 812.26(7)(b)2. 2. Concrete shall consist of a mixture of cement, water, sand, and gravel in the proportion of one bag Portland cement (94 pounds) (ASTM C 150, Type I or API-10A, Class A), an equal measure of sand and an equal measure of gravel, by weight or by volume, and not more than 6 gallons of water. As an alternative, a commercially prepared mix may be used providing the mix has at least 6 bags of cement per cubic yard. The gravel size may not exceed 1/3 of the inside diameter of the conductor (tremie) pipe used for filling and sealing the well or drillhole.
TABLE C
ACCEPTABLE MATERIALS AND METHODS FOR WELL FILLING AND SEALING
NR 812.26(8) (8)Well and drillhole filling and sealing reports.. A well and drillhole filling and sealing report shall be filed with the department no later than 30 days after the well or drillhole is filled and sealed. The filling and sealing report shall be filed by the person performing the filling and sealing work on forms specified by the department and shall include a complete, true and accurate detailed description of the location of the well or drillhole that was filled and sealed, materials and method of filling and sealing, construction and geologic features and Wisconsin Unique Well Number, if known. Water well drillers, heat exchange drillers, well constructors and pump installers shall report any unused wells or drillholes that are not filled and sealed for which they have knowledge to the department. Beginning July 1, 2016 filling and sealing reports shall be filed with the department electronically.
NR 812.26(9) (9)Well and drillhole filling and sealing license or registration requirements. In order to fill and seal a well or drillhole, or to verify that a well or drillhole was properly filled and sealed, a person must be licensed or registered in accordance with ch. NR 146 and ch. 280, Stats.
NR 812.26 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. (2) (a) 4., (3), (6) (c) (intro.), (7) (a) (intro.) 1. b., 2., 3. a., 4. a. and c. and 5., cr. (2) (d), (7) (a) 6. and Table C, Register, September, 1994, No. 465, eff. 10-1-94; CR 13-096: cr. (2) (a) 5m., am. (2) (b) 2., (c) 1.,cr. (7) (a) 7., am. (8), CR 13-099: am. (title), (1), (2) (a) (intro.), 1., 2., 4., cr. (2) (a) 5., 6., am. (2) (b), (c) (intro.), (d), (3), r. (4), am. (5) (intro.), r. (5) (e), am. (6) (title), (a), (b), (c) (intro.), 3. (intro.), (d) to (g), cr. (6) (h), (i), am. (7) (title), (a) (intro.), 1., 2., 3. (intro.), a., cr. (7) (a) 3. d. to g., am. (7) (a) 4. to 6., (b), cr. Table VI, r. and recr. Table C, am. (8), cr. (9) Register September 2014 No. 705, eff. 10-1-14; correction in numbering in (2) (a) 5m. made under s. 13.92 (4) (b) 1., Stats., Register September 2014 No. 705; 2015 Wis. Act 197 ss. 47, 48 Register April 2016 No. 724.
subch. III of ch. NR 812 Subchapter III — Requirements for New Pump Installations and Water Treatment
NR 812.27 NR 812.27 Pump installer requirements.
NR 812.27(1) (1) License requirement. Pump installers shall hold a valid Wisconsin license. A master plumber licensed under ch. 145, Stats., may install a pressure tank without a pump installers license. The name and license number of the pump installer or pump installer firm shall be identified on the pump installation truck and similar equipment. The identification shall be at least 2 inches in height with at least 1/4 inch wide brush stroke. The identification shall have a sharp color contrast with the background on which it is applied. The identification shall remain legible.
NR 812.27(2) (2)Location requirement. Except when the reporting requirements of s. NR 812.04 (2) are complied with, a pump may not be installed, replaced or serviced in a well that is not properly located according to the minimum location and separation requirements in effect at the time of construction and:
NR 812.27(2)(a) (a) According to the minimum location requirements in effect at the time of installation of any potential source of contamination, if the source was installed more recently, or
NR 812.27(2)(b) (b) According to the minimum location requirements of s. NR 812.08.
NR 812.27(3) (3)Pits. Existing pits and subsurface pumprooms shall comply with the conditions of a department approval to construct the pit or to the minimum standards of s. NR 812.42 (2).
NR 812.27(4) (4)Pitless adapters and units. Pump installers or persons installing pumps shall use approved pitless adapters and pitless units to make subsurface connection to wells as specified in s. NR 812.31.
NR 812.27(5) (5)Disinfection and well seals. The pump installer shall disinfect any potable well and water system according to s. NR 812.22 (4) and (5) upon completion of the original pump installation and thereafter, anytime the well is entered for the purpose of measuring or diagnosing any feature or problem with the well or after the well is entered for rehabilitation, redevelopment, reconditioning or cleaning or if the well is entered for the purpose of installing, replacing or repairing any equipment located within the well. Following disinfection, the disinfectant shall be flushed according to s. NR 812.22 (5). The disinfection and flushing shall be completed before the system is placed into service. The pump installer shall seal or cover the well with an approved vermin–proof cap or seal.
NR 812.27 Note Note: The pump installer may designate the owner, the property lessee or any other person to flush the system.
NR 812.27(6) (6)Sampling and reporting requirements. In accordance with all requirements of s. NR 812.41 (3), the pump installer, or his or her agent, shall collect a water sample or samples from a potable well no later than 30 days following completion of the original pump installation and thereafter no later than 30 days after the well is entered for the purpose of measuring or diagnosing any feature or problem with the well or after the well is entered for rehabilitation, redevelopment, reconditioning or cleaning or if the well is entered for the purpose of installing, replacing or repairing any equipment located within the well. The water sample shall be analyzed for coliform bacteria by either a laboratory certified by DATCP for bacteriological analysis of drinking water and having an agreement with the department for electronic submission of laboratory test reports to the department no later than 30 days after completion of the analysis, or be analyzed by the Wisconsin state laboratory of hygiene. For pump work that involves entry into the well, other than the original pump installation, water samples shall also be collected by the pump installer and analyzed for nitrate and arsenic by laboratories certified for those analyses and having an agreement with the department for electronic submission of laboratory test reports to the department within 30 days after completion of the analyses, or analyzed by the Wisconsin state laboratory of hygiene. The pump installer may designate the owner, the property lessee or any other person to collect the samples and submit them for analysis. The pump installer shall provide a copy of the laboratory test report(s) to the well owner within 10 days of the receipt of the report(s) by the pump installer.
NR 812.27(7) (7)Notification of contaminated wells. Pump installers shall notify a well owner if the pump installer becomes aware that the water from the well contains contaminants in excess of the primary drinking water standards in ch. NR 809.
NR 812.27(8) (8)Bacteriologically unsafe wells. The pump installer shall return to the well site to attempt to correct a problem with a potable well that produces bacteriologically unsafe water. The pump installer shall return no later than 90 days after the pump installation is completed or 30 days after the pump is placed into service, whichever is longer. If noncomplying installation or failure to disinfect was not the cause of the problem, a fee may be charged by the pump installer for any corrective work.
NR 812.27(9) (9) Potable water supplies shall be protected to prevent back-flow, back-siphonage and cross-connections according to the requirements in s. SPS 382.41 and s. NR 812.32 (1) (f).
NR 812.27(10) (10) When a pump installer has performed pump installation work not in compliance with this chapter, the pump installer shall return to bring the system into compliance. The pump installer shall pay all costs for bringing the installation into compliance with this chapter, other than those costs that would have been charged for an initially complying installation.
NR 812.27(11) (11) A pump installer may not install a pump in a well having an open annular space that extends deeper than twice the depth of the pitless adapter or pitless unit. When an annular space is open to a depth greater than this depth, the pump installer shall inform the well driller so that the driller knows to return to the job site and seal the annular space according to s. NR 812.20. The pump installation shall not be completed until the well driller has resealed the annular space. If the annular space is open to a depth less than or equal to twice the depth of the pitless adapter, the pump installer may seal the open annular space with an approved granular bentonite hydrated with water from a known safe and uncontaminated source.
NR 812.27 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. (2), (4) to (6), cr. (8) and (9), Register, September, 1994, No. 465, eff. 10-1-94; correction in (9) made under s. 13.93 (2m) (b) 7., Stats., Register, September, 1996, No. 489; correction in (9) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672; CR 13-099: am. (5), r. and recr. (6), am. (8), (9), cr. (10), (11) Register September 2014 No. 705, eff. 10-1-14.
NR 812.28 NR 812.28 Pump installation equipment and supply pipe. The department may prohibit the use of any water supply equipment if the department finds there is substantial evidence that the equipment poses a significant hazard to safe drinking water or the groundwater. The department shall state its decision and conclusions in writing to the manufacturer, the licensed pump installers and the industry representatives including the Wisconsin Water Well Association and the Wisconsin Pump and Well Suppliers Association. Unless otherwise specified, the prohibition of the use of any water supply equipment will take effect 12 months after the initial prohibition notice. Pump discharge and supply piping shall conform to the specifications in s. NR 812.17 for steel pipe or shall conform to the requirements in the “Pipe and Tubing for water services and private water mains" table in s. SPS 384.30, except that Type M copper pipe may not be installed underground. Pipe used for year-round installations shall be protected from freezing. Lead-based solder for pipe connections may not be used. The department recommends that galvanized pipe not be used when the water quality is known to be corrosive. Limitations on the use of plastic pipe are found in s. SPS 384.30. Plastic pipe may not be used for buried pipe in soils known to be contaminated with volatile organic chemicals. Plastic pipe may be used as drop pipe installed within a well or for discharge piping between the well and the building served, provided it meets s. SPS 384.30, standards and has a minimum pressure rating of 150 pounds per square inch. When plastic pipe extends through the seal of a well with an above-ground discharge, the portion of the plastic pipe extending above-ground from the well shall be protected from sunlight or the plastic pipe used shall be of the type with inhibitors recommended for use in direct sunlight.
NR 812.28 Note Note: The department recommends the installation of torque arresters on the drop pipe for submersible pumps.
NR 812.28 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. Register, September, 1994, No. 465, eff. 10-1-94; corrections made under s. 13.93 (2m) (b) 7., Stats., Register, May, 2000, No. 533; correction made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672; CR 13-099: am. Register September 2014 No. 705, eff. 10-1-14.
NR 812.29 NR 812.29 Height of finished well.
NR 812.29(1) (1) For wells constructed after February 1, 1991, the pump installation shall be completed such that the watertight well casing pipe for all wells, except those located in a floodplain, shall terminate at least 12 inches above the established ground surface, above a pumphouse or building floor or above any concrete or asphalt platform surrounding the well casing.
NR 812.29(2) (2) When a low capacity well is located in an area of traffic or where the well terminus is at risk of contact by vehicles, machinery, equipment or any other hazard that poses a significant threat of damage to the well terminus, the well shall be protected from physical damage by either using rigid metal posts or comparable barriers or by terminating it within a driveway ramp constructed in accordance with s. NR 812.36.
NR 812.29(3) (3) For wells in floodplains, the top of a well and an overflow outlet from a flowing well shall terminate at least 2 feet above the regional flood elevation. Pits may not be installed to enclose a well or pump installation.
NR 812.29(4) (4) A driveway ramp may not be installed in a floodplain.
NR 812.29(5) (5) The well casing pipe may not terminate in or extend through the basement or crawl space of a building, but may terminate in a walkout basement if the following conditions are met:
NR 812.29(5)(a) (a) It is possible to walk directly outside from the walkout basement without walking upstairs or upslope.
NR 812.29(5)(b) (b) The surface of the ground around the outside exit door of the walkout basement slopes down away from the door.
NR 812.29(5)(c) (c) The well and pump installation are accessible for repair and removal.
NR 812.29(5)(d) (d) The well produces water continuously free from contaminants in excess of the drinking water standards of s. NR 812.06.
NR 812.29(5)(e) (e) The well casing pipe depth meets the requirements of s. NR 812.42 (1) (b).
NR 812.29(5)(f) (f) The well and pump installation are in compliance with all other requirements of this chapter.
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Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.