| 摘要 |
A cased water well comprising a generally tubular water well casing extending from subgrade to above grade. A flexible pad is attached to the water well casing for preventing aquifier contamination. The pad has an upwardly extending, generally tubular, flexible and water impermeable neck which is circumferentially continuous. The neck has an axially disposed opening which is adapted to be removably received over the upper terminus of the well casing and the neck is compressibly and sealingly attached to the outer surface of the well casing. A water impermeable flexible skirt is sealingly attached to the neck and extends radially outwardly a substantial distance in all directions from the neck. The flexible skirt has a lower surface which is adapted to be in contact with the earth and an upper surface which slopes continuously downwardly and outwardly from the neck to the outermost edges of the skirt.
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