Borehole analytical I-data

[SBrellen]

When entering borehole analytical data, is it better to use the depths of the water column or depths of the screened interval as "depth1" and "depth2".

[SBrellen]

The groundwater samples are usually collected using a bailer following purging a set amount of volume from the well so I think of them as a composite of the water column without a set depth. If using low flow, the pump intake is placed in the center of the screened interval so I treat that as sampling an interval. The screened interval is usually set below the top of the saturated zone and, when not in drought conditions, the water column does extend above the screened interval.