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NR 811.18(4) (4) If the depth of unconsolidated material is less than 60 feet and the sandstone is the upper rock formation, the department shall be contacted for the required depth of grouted casing.
NR 811.18 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.
NR 811.19 NR 811.19 Special requirements for limestone or dolomite wells. This section applies to wells drilled in formations commonly referred to as limestones and dolomites in Wisconsin. This includes the Niagara dolomite, the Galena-Platteville dolomite and the Prairie du Chien dolomite. When an acceptable sandstone aquifer can be utilized, construction of limestone or dolomite wells should be avoided. The following requirements apply to wells located in limestone and dolomite aquifers which are not overlain by consolidated shale or sandstone formations.
NR 811.19(1) (1) At a minimum, continuous disinfection, and possibly detention, shall be provided when the department determines that additional protection is necessary.
NR 811.19(2) (2) Continuous disinfection shall be provided for wells with less than 60 feet of grouted casing.
NR 811.19(3) (3) If the depth of unconsolidated material overlying the limestone is 60 feet or greater for a minimum radius of one-half mile and there is no record of sinkholes, quarries, improperly constructed wells, or outcrops within that area, the minimum depth of grouted casing shall be 60 feet. The casing shall be installed to a depth of 10 feet below the anticipated pumping water level unless the department waives this requirement after finding it unnecessary in meeting the requirements of this chapter.
NR 811.19(4) (4) If the depth of unconsolidated material is more than 60 feet and only 60 feet of grouted casing is required by the department, the casing shall be seated in firm limestone.
NR 811.19(5) (5) If the depth of unconsolidated material is less than 60 feet at the well site or within one-half mile of the well site, the department shall be contacted to determine the required minimum depth of grouted casing. An inner casing size of at least 12 inches in diameter shall be required to permit the installation of a grouted liner at a future date if the water from the well shows evidence of contamination. The department may waive the casing size requirement if it is demonstrated that it is unnecessary to meet the requirements of this chapter. In such cases, a minimum of 100 feet of grouted casing is usually required and, where conditions dictate, considerably more than 100 feet shall be required.
NR 811.19 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.
NR 811.20 NR 811.20 Special requirements for granite wells. The department shall be contacted for specific case-by-case constructional requirements for all proposed developments of wells in Precambrian igneous and metamorphic rock commonly referred to as “granite". At a minimum, continuous disinfection and possibly detention, shall be provided when the department determines that additional protection is necessary.
NR 811.20 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.
subch. III of ch. NR 811 Subchapter III — Source Development — Surface Water
NR 811.21 NR 811.21 General requirements. Surface water sources include all lakes, rivers and streams. The source of water selected as a surface water supply shall be from the best available source which is practicable. The source shall provide the highest quality water reasonably available which, with appropriate treatment and adequate safeguards, will meet the drinking water standards in ch. NR 809. The department's office of energy should be contacted to initiate pre-application consultation regarding chapter 30 permitting. Any proposal which would result in a diversion from the Great Lakes basin requires department approval in accordance with s. 281.346, Stats.
NR 811.21(1) (1)Quality. An investigative study shall be made of the factors, both natural and man made, which may affect water quality. The study shall include:
NR 811.21(1)(a) (a) Determining possible future uses of the water body.
NR 811.21(1)(b) (b) Determining degree of control of the watershed by the water user.
NR 811.21(1)(c) (c) Assessing degree of hazard to the water supply by agricultural, industrial, recreational, shipping and residential activities in the watershed, and by accidental spillage of materials that may be harmful or detrimental to the treatment process.
NR 811.21(1)(d) (d) Assessing all waste discharges, point source and non-point source, and activities that could impact the water supply. The location of each waste discharge shall be shown on a scale map.
NR 811.21(1)(e) (e) For lakes, an analysis of the area water currents and for streams, an analysis of streamflows, and their potential impact on water quality.
NR 811.21(1)(f) (f) Obtaining samples that are representative of the proposed intake structure based on depth and location. Parameters that may be subject to seasonal variation shall be taken for a period of up to one year or over a sufficient period of time to assess such variation. Testing shall include turbidity, pH, alkalinity, hardness, bromide, total organic carbon, color, taste and odor, ammonia, microbiological organisms, heavy metals including lead and copper, volatile organics, synthetic organics, inorganics, and radiological characteristics of the water. The microbiological testing shall satisfy the Long Term 2 Enhanced Surface Water Treatment Rule requirements found in ss. NR 809.33 to 809.335. The source water shall meet the surface water quality standards in ch. NR 102.
NR 811.21(2) (2)Quantity. The quantity of the water at the source shall:
NR 811.21(2)(a) (a) Be adequate in conjunction with water from other existing sources to meet the maximum 20 year projected water demand of the service area as shown by calculations based on a one in 50 year drought or the extreme drought of record and should include multiple year droughts.
NR 811.21(2)(b) (b) Provide a reasonable reserve for anticipated growth.
NR 811.21(2)(c) (c) Be adequate to provide ample water for other legal users of the source in accordance with ss. 30.18, 31.02, 281.35, and 281.41, Stats., and ch. NR 142.
NR 811.21(3) (3)Location. The inlet for the intake shall not be located:
NR 811.21(3)(a) (a) Within 1000 feet of boat launching ramps, marinas, docks, or floating fishing piers which are accessible by the public.
NR 811.21(3)(b) (b) In areas subject to excessive siltation or in areas subject to receiving immediate runoff from wooded sloughs or swamps.
NR 811.21(3)(c) (c) Within 1000 feet of a wastewater treatment plant outfall outlet.
NR 811.21(4) (4)Minimum treatment. The design of the treatment processes, equipment, and structures shall depend on an evaluation of the nature and quality of the particular water to be treated.
NR 811.21(4)(a) (a) The design of the water treatment plant must consider the worst conditions that are projected to occur during the life of the facility.
NR 811.21(4)(b) (b) Filtration preceded by appropriate pretreatment shall be provided for all surface waters.
NR 811.21(4)(c) (c) Disinfection shall be provided for all surface waters.
NR 811.21(4)(d) (d) Additional treatment may be required by the department based on raw water sampling and other water quality factors.
NR 811.21 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.
NR 811.22 NR 811.22 Intakes. Intake structures shall provide for all of the following:
NR 811.22(1) (1) Velocity of flow .25 to .50 feet per second through the inlet structure so that frazil ice will be held to a minimum.
NR 811.22(2) (2) Withdrawal of water from the depth of the best water quality or the capability to draw from more than one level or more than one location if water quality varies with depth or location or both.
NR 811.22(3) (3) Inspection manholes every 1,000 feet for pipe sizes large enough to permit visual inspection.
NR 811.22(4) (4) Adequate protection against rupture by dragging anchors, ice, and other activity.
NR 811.22(5) (5) Locations referenced by permanent monuments or latitude and longitude as measured by a Global Positioning System (GPS).
NR 811.22(6) (6) A diversion device capable of keeping large quantities of fish or debris from entering an intake structure where shore wells are not provided.
NR 811.22(7) (7) Control of nuisance organisms where necessary in accordance with s. NR 811.232.
NR 811.22 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.
NR 811.23 NR 811.23 Shore wells.
NR 811.23(1)(1) Shore well structures shall comply with all of the following:
NR 811.23(1)(a) (a) Have motors and electrical controls located above grade and above flood level.
NR 811.23(1)(b) (b) Be accessible for operation and service.
NR 811.23(1)(c) (c) Be designed to prevent flotation.
NR 811.23(1)(d) (d) Be equipped with a minimum of 2 removable or traveling screens or an equivalent means of screening before the pump suction well. Systems with only one screen shall be provided with a bypass.
NR 811.23(1)(e) (e) Provide chlorination or other chemical addition facilities for raw water transmission mains.
NR 811.23(1)(f) (f) Have the intake piping valved with provisions for backflushing and testing for leaks, where practical.
NR 811.23(1)(g) (g) Have provisions for controlling surges.
NR 811.23(1)(h) (h) Have sloped bottoms.
NR 811.23(2) (2) The requirements in sub. (1) may be waived by the department on a case-by-case basis if it is demonstrated that they are not necessary to fulfill the other requirements of this chapter.
NR 811.23 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.
NR 811.231 NR 811.231 Off-Stream raw water storage.
NR 811.231(1) (1) Definition. In this section, “off-stream raw water storage reservoir" is defined as a facility into which water is pumped during periods of good quality and high stream flow for future release to the treatment facilities.
NR 811.231(2) (2)Construction. Off-stream raw water storage reservoirs shall be constructed to assure all of the following:
NR 811.231(2)(a) (a) Water quality is protected by controlling runoff into the reservoir.
NR 811.231(2)(b) (b) Dikes are structurally sound and protected against wave action and erosion.
NR 811.231(2)(c) (c) Intake structures meet the requirements of s. NR 811.22.
NR 811.231(2)(d) (d) Point of influent flow is separated from the point of withdrawal.
NR 811.231(2)(e) (e) Water is regularly circulated to prevent stagnation.
NR 811.231(2)(f) (f) The reservoir is surrounded by a fence and unauthorized access is prevented.
NR 811.231(2)(g) (g) The reservoir is covered, where practical.
NR 811.231(2)(h) (h) The requirements of s. NR 811.47 (7) are met if the reservoir is to be used as a pre-sedimentation basin.
NR 811.231 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.
NR 811.232 NR 811.232 Intake chemical treatment. If the department determines that chemical treatment is warranted for taste and odor control or the control of zebra and other mussels and other nuisance organisms in an intake, the following requirements shall be met:
NR 811.232(1) (1) Chemical treatment shall be installed in accordance with subch. VI and plans and specifications shall be approved by the department prior to installation.
NR 811.232(2) (2) Solution piping and diffusers shall be installed within the intake pipe or in a suitable carrier pipe. Provisions shall be made to prevent dispersal of chemicals into the water environment outside the intake. Diffusers shall be located and designed to protect all intake structure components.
NR 811.232(3) (3) A spare solution line shall be installed to provide redundancy and to facilitate the use of alternate chemicals, where practicable.
NR 811.232(4) (4) A sample line out to the intake shall be provided which will allow for collecting raw water samples unless the chemical control system will be shut off for periods sufficient to collect raw water samples at the shore well.
NR 811.232 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; renumbering of (1) to (4) made under s. 13.92 (4) (b) 1., Stats., Register November 2010 No. 659.
subch. IV of ch. NR 811 Subchapter IV — Pumping Stations, Pumphouses, and Water Treatment Plant Buildings
NR 811.24 NR 811.24 General requirements. All water system related buildings shall be designed to maintain the sanitary quality of the water supply. Buildings subject to the requirements of this subchapter include surface water and groundwater water treatment plant buildings, structures and pumping stations, well pumphouses and enclosures, and booster pumping stations. Uses of the buildings shall be compatible with the protection of the water supply.
NR 811.24 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.
NR 811.25 NR 811.25 Buildings.
NR 811.25(1)(1) Construction. All water system related buildings under s. NR 811.24 shall meet all of the following requirements:
NR 811.25(1)(a) (a) Have adequate space for the installation of additional pumping units, water treatment equipment, chemical feed equipment, or controls, if needed, and for the safe servicing of all equipment.
NR 811.25(1)(b) (b) Be durable, fire and weather resistant, and constructed in a manner to maximize sanitary protection of the water supply.
NR 811.25(1)(c) (c) Be secure. Buildings shall have at least one outward opening door to the outside. All doors, windows, and hatches shall have locks. Any security alarms installed shall be connected to telemetry control and SCADA systems where such systems are used.
NR 811.25(1)(d) (d) Be landscaped to conduct surface drainage away from the station and have a floor elevation at least 6 inches above the finished grade and at least 2 feet above the regional flood elevation as determined in s. NR 116.07 (4). Buildings shall be provided with year round dry land access. Below grade installations may be permitted only if the terrain at the site is such that a gravity drain system can be provided. Subsurface pits or pumprooms and inaccessible installations intended to house well heads, pumps, pump motors, or pump controls for pumping stations are prohibited except for below grade booster pumping stations as allowed per s. NR 811.80 (3) and (4).
NR 811.25(1)(e) (e) Provide for all floors to drain so that floor runoff does not enter the treatment process or source water. Floors shall be sloped to a drain or sump.
NR 811.25(1)(f) (f) Provide a suitable outlet for drainage water from pump glands so that the disposal of any drainage water is piped to waste or otherwise disposed of in a controlled manner. Pump gland drainage piping shall not be directly connected to a hub drain or a floor drain.
NR 811.25(1)(g) (g) Be provided with concrete floors.
NR 811.25(1)(h) (h) Be provided with at least one floor drain meeting the following requirements:
NR 811.25(1)(h)1. 1. Floor drains and hub drains shall be properly separated from a well. A floor or hub drain and associated piping accepting water from pump gland drainage, a pressure relief or control valve, a sampling faucet, or the floor shall be located no closer than 2 feet to the outer well casing. No building drain piping, except that piping leading to the aforementioned floor or hub drains, containing blackwater or graywater, may be located closer than 8 feet to the outer well casing.
NR 811.25(1)(h)2. 2. Floor drains and hub drains shall have a discharge location that complies with all of the following requirements:
NR 811.25(1)(h)2.a. a. Floor drains and hub drains may be connected to a sanitary sewer where available if the building floor elevation is at least one foot above the rim elevation of the nearest upstream sanitary sewer manhole. If a sanitary sewer is available but a manhole is not located nearby or the manhole does not comply with the upstream location or the one foot requirement, the department may require installation of an additional manhole on the sanitary sewer main or on the sanitary building sewer.
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.