What is a “lead slip packer” used for?
A water supply well shall not be located in any of the following areas:
Driven wells can be installed only in soft formations free from ________
If the wellhead is also equipped with a threaded hose bibb in addition to the threadless sampling tap, the hose bibb shall be fitted with:
What is the average greatest suction lift that can be developed practically on a well point system
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