(A) The premises, materials, tools and drilling equipment shall be maintained so as to minimize contamination of the underground aquifer during the drilling process.
(B) Water used in any drilling operation shall be of safe sanitary quality. Water used in the mixing of drilling fluids or mud shall contain a chlorine residual of at least 0.5 mg/l.
(C) The slush pit shall be constructed and maintained so as to minimize contamination of the drilling mud.
(D) The casing material used in the construction of wells shall conform to the American Water Works Association standards. The casing shall extend to a point 18 inches above the elevation of the finished floor of the pump room or natural ground surface. The casing shall extend at least to the depth of the shallowest water formation to be developed and deeper, if necessary, in order to eliminate all undesirable water bearing strata. Well construction materials containing more than eight percent lead are prohibited.
(E) The space between the casing and drill hole shall be sealed by using sufficient cement under pressure to completely fill and seal the annular space between the casing and drill hole. The well casing shall be cemented in this manner from the top of the shallowest formation to be developed to the earth’s surface.
(F) Safeguards shall be taken to prevent possible contamination of the water or damage by trespassers following the completion of the well and prior to the installation of the well pump and well head.
(G) In all cases, a concrete sealing block extending at least three feet from the well casing in all directions, with a minimum thickness of six inches, and sloped to drain away from the casing at not less than 0.25 inches per foot shall be provided around the wellhead.
(H) Well heads and pump bases shall be sealed by the use of gaskets or sealing compounds and properly vented to prevent the possibility of contamination of the well water. A well casing vent shall be provided with the opening screened with 16-mesh or finer corrosion-resistant screen, faced downward, and located and elevated so as to minimize the drawing of contaminants into the well.
(Ord. 4-9-98, passed 4-4-1998)