Sealing the well protects the well’s producing zone from contamination.(a) True(b) FalseI had been asked this question during an interview for a job.This is a very interesting question from Wells in chapter Irrigation Works, Culverts, Bridges and Wells of Civil Engineering Drawing

Sealing the well protects the well’s producing zone from contaminati

1.	Sealing the well protects the well’s producing zone from contamination.(a) True(b) FalseI had been asked this question during an interview for a job.This is a very interesting question from Wells in chapter Irrigation Works, Culverts, Bridges and Wells of Civil Engineering Drawing
Answer» Correct choice is (a) True The explanation is: The diameter of the borehole is usually slightly LARGER than the casing being installed. The space between the borehole and the casing is called the annulus of the well or the ANNULAR space. It must be sealed to PREVENT any surface CONTAMINATION from migrating downward and contaminating the WATER supply. A properly sealed annulus also prevents any mixing of poor quality water from upper aquifers with water from the producing aquifer of the well.

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