Definitions for "Groundwater level"
The surface of free water (groundwater). Soils below the groundwater line are saturated.
underground surface below which the ground is wholly saturated with water; "spring rains had raised the water table"
The upper surface or top of the saturated portion of the soil or bedrock layer that indicates the uppermost extent of groundwater.
Keywords:  slurry, excavated, mud, boring, shallow
A shallow pit, excavated adjacent to a boring location, used to contain drilling mud (slurry) during drilling.