Chlorine shall be placed in the well in sufficient quantities to produce a chlorine residual of at least:
The chlorine solution shall stand in the well for a period of minimum _____hours or more
When a threadless sampling tap is installed the flowing elements shall be required:
What are the most important things when choosing material for a screen:
When grout has to be placed on casing greater than 20 feet below land surface one of the following two methods must be used:
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