Grout may be introduced by a pump through a pipe that may be introduced into the _______ outside the casing
The well contractor identification plate is required to be installed within ______ hours after drilling is complete:
What conditions can be found in corrosive water where the pH is lower 7:
Vertical seepage can occur readily outside when ______ is left unsealed in the ground near the surface
When removing wells screens of 16 inch diameter or larger a _______ is used at the lower end of the pulling pipe instead rather than sacking
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