Geophysical Borehole Logging for Landfill Monitoring Well Placement

A growing landfill required constant monitoring along its periphery to ensure aging liners and containment systems were functioning as designed. New monitoring wells were needed in key locations at proposed expansion points. The geologically complex area required in-depth analysis of migration flow paths to effectively site the monitoring wells. Using borehole geophysics, we detailed planar-feature mapping and identified water-bearing fractures so the new monitoring wells could be placed and constructed with high confidence.

We provided a virtual rock core showing the borehole walls, as well as digital data on the orientation of notable features (i.e., fractures that could carry water or contaminants) intersecting the well in situ. An actual rock core is more expensive and time-consuming and must be viewed at the ground surface, where key elements such as void locations or fractures may be lost or destroyed during coring.

Geophysical borehole logging is a cost-effective and time-efficient way to gain additional subsurface information from existing wells.

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