GEOPROBE ® GROUNDWATER PROFILER

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Groundwater profilers allow operators to create an injection pressure log utilizing the HPT (Hydraulic Profiling Tool) instrumentation as well as stopping to sample groundwater in zones of high permeability. Vertically profile an aquifer and obtain numerous high-quality groundwater samples all while creating an injection pressure log. The groundwater profilers each have 20 HPT screens spread across 4.5in (11.4cm). They work well in highly permeable aquifers when numerous samples are desired.

The 1.75” tool is advanced at approximately 1 meter per minute. Using the HPT data, when a high permeable zone is identified the advancement of the tool is stopped. Two ¼” Poly lines are pre-strung (one providing DI water downhole, one connected to a micro bladder pump), which are connected to the GW tool. The ¼” line connected to the micro bladder pump is cycled (pulled) and water is lifted to the surface. The SC (Specific Conductance) is monitored until a baseline is reached. When baseline is reached, the poly tubing is used to fill up sampling VOA’s. When sampling is completed, DI water is introduced again, while still lifting water with the micro bladder. SC is monitored again, and DI water is pumped until the SC reaches prior sampling baseline. Once baseline is reached, sampling is stopped and advancement of the tool proceeds.