NR 811.12(9)(9) Packers. A packer may be utilized for test pumping, isolating portions of a well for water quality sampling, and for grouting liner casings. Permanent well reconstruction may not be completed with an inflatable packer. The packer shall be of a material that will not impart taste, odors, toxic substances, or bacterial contamination to the water in the well. Lead packers may not be used.

NR 811.12(10)(a)(a) Be constructed of stainless steel which will not be damaged by chemical action of groundwater, disinfection chemicals, or future cleaning operations.

NR 811.12(10)(b)(b) Have size of openings based on sieve analysis of the aquifer and gravel pack materials.

NR 811.12(10)(c)(c) Be designed to have an entrance velocity that does not exceed 0.1 feet per second under normal operating conditions or as detailed in AWWA Standard A100-20 dated July 1, 2020, which is incorporated by reference.

NR 811.12 NoteNote: AWWA Standard A100-20 is the American Water Works Association specification for Water Wells published on July 1, 2020. A copy of the AWWA standard is available for inspection at the Legislative Reference Bureau and may be obtained from the American Water Works Association, awwa.org.

NR 811.12(10)(d)(d) Be installed and have pumping equipment designed so that exposure of the screen above the pumping level will not occur during normal operation.

NR 811.12(10)(e)(e) Be provided with a bottom plate of the same material as the screen.

NR 811.12(11)(11) Blasting. Approval shall be obtained from the department prior to blasting within a well. Information regarding the procedure, number, size, and location of charges shall be submitted to the department in writing. Blasting under this subsection is subject to all of the following requirements:

NR 811.12(11)(a)(a) Blasting shall be conducted under the supervision of a licensed well driller and a blaster licensed by the department of safety and professional services under s. SPS 305.20.

NR 811.12(11)(b)(b) No blasting may occur within 100 feet of the grouted protective casing unless specific information is submitted for department approval that justifies the use of low strength prima-cord or charges between 50 and 100 feet of the grouted protective casing if necessary to maintain the production capacity or water quality of a well with a limited length of open drillhole.

NR 811.12(11)(c)(c) All material dislodged during the blasting shall be removed from the well.

NR 811.12(11)(d)(d) Proper safety measures shall be employed to protect the workers and surrounding structures.

NR 811.12(11)(e)(e) The department’s regional drinking water staff person shall be given at least 48 hours notice prior to the date and time of the proposed blasting work.

NR 811.12(11)(f)(f) Following the completion of the blasting procedure, the well shall be thoroughly disinfected and pumped to waste, and safe bacteriological water samples shall be collected according to the requirements of s. NR 810.09 (4).

NR 811.12(11)(g)(g) The owner or an authorized representative shall submit a written report to the department within 30 days of the date of completion of the blasting and subsequent pumping of the well that includes the static and pumping water levels, gallon per minute pumping rate and specific capacity of the well both before and after the blasting, and the results of any testing for chemical or physical properties for which the well may have been blasted, if applicable.

NR 811.12(12)(12) Chemical conditioning. Approval shall be obtained from the department prior to chemical conditioning of a well. Information regarding the method proposed, equipment, chemicals, testing for residual chemicals, disposal of waste, and inhibitors to be used shall be submitted to the department in writing. Chemical conditioning under this subsection is subject to all of the following requirements:

NR 811.12(12)(a)(a) The department’s regional drinking water staff person shall be given at least 48 hours prior notice prior to the date and time of the proposed chemical conditioning work.

NR 811.12(12)(b)(b) Chemical conditioning, with the exception of batch chlorination, shall be performed by or under the supervision of a licensed well driller.

NR 811.12(12)(c)(c) All chemicals used in conditioning shall be NSF/ANSI Standard 60 approved for use in potable water as required per s. NR 810.09 (1) (c) unless an alternative chemical is approved by the department.

NR 811.12(12)(d)(d) Acid treatment shall include pH monitoring of nearby private or public wells, use of an inhibitor to protect the metal portions of the well and pump, complete removal of the acid from the well, neutralization of the spent acid, and proper disposal of the spent acid.

NR 811.12(12)(e)(e) The resident project representative shall closely supervise the discharge of chlorinated water. In no case may water with a measurable total chlorine residual content be discharged to a surface water. Suitable barriers, aeration or chemical dechlorination shall be provided when discharging chlorinated water to a surface water or a storm sewer connected to a surface water to ensure the water discharged does not contain a measurable chlorine residual.

NR 811.12(12)(f)(f) Following completion of the chemical conditioning procedure, the well shall be thoroughly disinfected with chlorine only. Acids for pH control may only be used when the acid does not include additives or the only additives used are intended to mitigate corrosion of metal surfaces. Following disinfection, the well shall be pumped to waste and safe bacteriological water samples shall be collected according to the requirements under s. NR 810.09 (4).

NR 811.12(12)(g)(g) The owner or an authorized representative shall submit a written report to the department within 30 days of the date of completion of the chemical conditioning and subsequent pumping of the well that includes the static and pumping water levels, gallon per minute pumping rate and specific capacity of the well both before and after chemical conditioning, and the results of any testing for chemical or physical properties for which the well may have been chemically conditioned, if applicable.

NR 811.12(12)(h)(h) All material released from the casings, screen, and borehole as part of the rehabilitation shall be removed from the well.

NR 811.12(12)(i)(i) The department may require additional water quality sampling following a well rehabilitation based on well raw water quality and the rehabilitation methods used to verify water quality and to protect water consumers.

NR 811.12(13)(13) Other methods of well reconditioning. Approval shall be obtained from the department prior to performing any other type of reconditioning procedure, including hydrofracturing and impulse generation techniques. The requester shall submit written information regarding the procedure, the equipment, materials, chemicals, pressures to be used, and the disposal of waste to the department for approval. Reconditioning procedures under this subsection are subject to all of the following requirements:

NR 811.12(13)(a)(a) Hydrofracturing. Hydrofracturing procedures shall meet the following requirements: