(A) The casing in wells located within areas described in § 52.61 shall be grouted from land surface to a depth of at least 35 feet.
(B) The casing in wells in which the producing zone underlies zones containing non-potable water shall be grouted from land surface to the top of the producing zone or first impervious layer having a thickness of at least ten feet above the producing zone.
(C) The casing in all other wells shall be grouted from land surface to a minimum depth of 20 feet.
(D) The cement grout shall be placed around the casing by one of the following methods.
(1) Pressure. The annular space between the casing and formation shall be a minimum of one and one-half inches. Cement grout shall be pumped or forced under pressure through the bottom of the casing until it fills the annular area around the casing and overflows at the surface.
(2) Pumping. The annular space between the casing and formation shall be a minimum of one and one-half inches. Cement grout shall be pumped into place through a hose or pipe extended to the bottom of the annular space which can be raised as the grout is applied. The grout hose or pipe should remain submerged in grout during the entire application.
(3) Annular space. The annular space around the casing shall be a minimum of three inches, the annular space shall be completely filled with cement grout by any method that will ensure complete filling of the space, provided the annular area does not contain water. If the annular area contains water, the water shall be removed or the grout shall be placed by either the pumping or pressure methods.
(E) If an outer casing is installed, it shall be grouted by either the pumping or pressure methods.
(F) All grout mixtures shall be prepared before emplacement.
(G) The well shall be grouted within five working days after completion of drilling.
(H) The contractor will give oral notice to the Health Department of any grouting to be done. The notice shall be given in sufficient time to allow the Health Department to inspect the well before the grout is emplaced.
(Ord. passed 7-23-1984)