1. Source.
A. The source of supply shall be from a water bearing formation drawn not less than 100 feet from the ground surface, with at least 20 feet of properly grounded well casing, and from no formation which is subject to pollution.
B. New hand dug wells are prohibited.
2. Casing.
A. The well shall have a water-tight and durable wrought iron, steel, or other type of approved casing with a nominal thickness of 3/16 (.1875) inches and 6 inches, outside diameter. The sections shall be joined together by threaded couplings, joints, by welding or any other water-tight approved joint or coupling. Plastic well casing shall be polyvinylchloride (PVC) minimum schedule 40.
B. Casing shall be installed 20 feet from the finished grade or in any case shall be extended 10 feet into bedrock or other impervious strata. Driven wells shall be provided with a drive shoe or other effective casing seal.
C. An annular space shall be provided between the well casing and the earth formation of a radius at least 1½ inches greater than the casing radius, excluding coupling for internal pressure grouting, or 1½ inches greater than the casing radius, excluding coupling for external grouting. The annular space shall be completely filled with impervious cement grout or equivalent sealing material from bottom of the casing to the ground surface. External grouting shall be accomplished utilizing a tremie pipe and grout pump to force out any standing water on the outside of the well casing. The casing shall be sealed effectively against entrance of water from water-bearing formations which are subject to pollution, through which the casing may pass. If casings of smaller diameter are used in the lower portions of the well, effective water-tight seals shall be provided between the casings where they telescope. In such instances, sections of casings shall telescope for a minimum distance of 4 feet.
D. If plastic well casing is used, the annular space shall be pressure grouted to the full depth of the casing using bentonite grout.
E. The top of the well casing shall extend a minimum of 12 inches above the finished grade of the lot so that contaminated water or other substances cannot enter the well through the annular opening at the top of the well case.
F. In areas where flooding is likely to occur, including 100-year flood plains, the casing shall reach a height of at least 2 feet above the predetermined 100-year flood elevation or, in the absence of a pre-determined flood elevation, a minimum of 2 feet above the finished ground surface.
3. Drainage. The ground surrounding the top of the well casing for a radius of not less than 10 feet shall be sloped away from the well to prevent surface runoff from entering the completed well.
4. Well Covers. Every domestic use water well shall be equipped with an insect proof cover at the top of the well casing. Covers shall extend downward at least 2 inches over the outside of the well casing. Any restoration/repair of wells with casing terminating below grade shall be raised above grade to 12 inches minimum. Electrical wiring for well pumps shall be encased in conduit from the bottom of the water supply pipe trench to the well cap.
5. Abandonment.
A. A well is considered abandoned or permanently discontinued if a pump was not installed in a new well that was constructed or if an existing well has not been utilized for a period of 1 year or more.
B. Every domestic water well which is abandoned, if not grouted with the casing in place, shall have the casing removed and be filled to a depth of 10 feet below grade with ASHTO #57 crushed stone and then grouted from 10 feet below grade to the top of the well.
C. Every abandoned hand dug domestic water well shall be filled with environmentally safe material free of debris or waste materials (ASHTO #57 crushed stone).
6. Springs. This Section of the standards is to be used for reconstruction of existing springs only. Before rehabilitation shall begin on an existing spring, a report shall be made to determine the advisability of said reconstruction, which shall include as a minimum, quality and quantity of water. Springs for new construction are not considered an adequate water supply and will not be considered as valid for the issuance of a building permit. Reconstructed springs shall be completely enclosed by walls and a cover of reinforced concrete or equally durable water-tight material. This cover shall have a firm foundation so as to effectively prevent settling. The uphill wall shall be so constructed as to prevent entrance of surface water. Where manhole covers are used, the manhole shall be at least 24 inches in diameter. It shall extend at least 3 inches above the surrounding ground surface and be covered by an impervious durable cover of concrete, steel or equivalent material which overlaps the manhole vertically by at least 2 inches. The manhole cover shall be effectively secured to the manhole by bolting, locking or equivalent means, and shall be kept so secured.
7. Pump Enclosure. Any pump room or any enclosure around a well pump shall be drained and protected from freezing by heating or other approved means. Well pits shall be prohibited.
8. Geothermal Borehole Grouting. Geothermal boreholes shall be completely filled with either of the following 2 options:
A. The geothermal borehole shall be completely filled with impervious cement grout or equivalent sealing material from the bottom of the borehole to the bottom of the header trench.
B. The geothermal borehole shall be filled with ½ inch clean crushed stone to a minimum of 10 feet below the point at which the borehole enters the rock. The remainder of the borehole above the top of the crushed stone shall be completely filled with impervious cement, grout or equivalent sealing material to the bottom of the header trench.
(Ord. 96-6, 6/10/1996, §VIII; as amended by Ord. 2011-02, 2/14/2011, § 1; as reenacted and amended by Ord. 2017-01, 1/9/2017, §1)