(A) The well shall be constructed so that a pump with a capacity equal to the well capacity, within the practical limits of pumps for a given diameter well, can be installed and operated without binding or without interference by contact with any part of the well.
(B) All water-bearing zones that contain polluted or nonpotable mineralized water shall be adequately cased and cemented off so that pollution of underlying or overlying water-bearing zones will not occur.
(C) Drilling fluids shall be obtained from an uncontaminated source, or shall be disinfected prior to use.
(D) Every well shall be cased with the bottom of the casing extending to a minimum depth as follows.
(1) Wells located within the area described in § 52.61 shall be cased from land surface to a depth of at least 35 feet.
(2) Wells located in any other area shall be cased from land surface to a depth of at least 20 feet.
(E) The top of the casing shall be terminated by the drilling contractor at least 12 inches above land surface.
(F) The well shall be adequately cased to prevent formation material from entering the well after the well has been developed and completed by the drilling contractor.
(G) The casing in wells constructed to obtain water from a consolidated rock formation shall be firmly seated and sealed to a depth of at least one foot below the top of the consolidated rock.
(H) The casing in wells constructed to obtain water from an unconsolidated rock formation, such as gravel, sand, or shells, shall extend at least to the top of the water-bearing formation.
(I) Except as otherwise specified in these regulations, the permanent well casing shall comply with the following:
(1) Casing weighing less than standard weight steel pipe is not recommended by the Department for water supply wells, however, steel casing of six and five-eighths inches outside diameter weighing less than standard weight steel pipe will be permitted if the following requirements are met:
(a) The owner prefers casing weighing less than standard weight steel pipe;
(b) The casing shall have a minimum weight of 13 pounds per foot when threaded and coupled;
(c) The casing shall have a minimum nominal wall thickness for a given diameter equal to that specified in § 52.64; and
(d) The casing shall meet the requirements for water well casing pipe of ASTM-A589-70 specifications.
(2) Have watertight joints that shall be electrically welded, or threaded and coupled with heavy recessed-type couplings, the coupling should cover the threads when made power tight;
(3) Be equipped with a drive shoe when the casing is seated in a consolidated rock formation and any other wells if the casing is driven. The drive shoe shall be forged, high carbon, tempered, seamless steel, and have a beveled hardened cutting edge. A drive shoe will not be required for wells in which:
(a) The cement grout surrounds and extends the entire length of the casing; and
(b) The casing is installed without interference from formational material.
(4) If galvanized, must be galvanized in compliance with the requirements of the latest revision of ASTM Specification A120.
(Ord. passed 7-23-1984)