TM 5-3820-256-10Figure 2-46. Bailer(5)Repeat steps 2, 3, and 4 until all the sand and dirt is cleared from the hole.b. SoundingWell . The well sounder (See figure 2-47) is an instrument designed to test water wells to determinethe static or standing water level. The sounder is also used after pump installation to test for draw-down withpump running.(1)Open the lid of the well sounder and reel off the cable, lowering the electrode tip into the well slowly.(2)Depth is indicated in one-foot increments on the cable. Observe the meter as you lower the cable in thehole. When the electrode tip reaches water level, the meter will register a steady positive reading. Stoplowering the cable and note the depth marker on the cable.(3)Operate the crank handle to roll up sounder cable, wiping water off the cable before it wraps onto the reel.When cable has been rolled up, close lid to shut off the well sounder.c. WaterTreatment.(1)Prior to installing the pump, pour the contents of one or two 3.75 lb packages of calcium hypochlorite(included in the well-completion kit), into the well.2-110
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