The HPT (Hydraulic Profiling Tool) directly measures permeability by injecting water into the underground formation. The pressure response of the soil to injection of water is measured to indicate the soil grain size. Real-time continuous data can be produced in both fine and coarse grained material with saturated or unsaturated conditions.

The system consists of two sensors:

• A sensitive downhole transducer to record dynamic pore pressure
• An electrical conductivity sensor providing information on lithology

While most soil profiling methods infer permeability from parameters like grain size or geotechnical properties, the HPT system can measure continuous data on hydraulic permeability directly by injecting water into the formation.

With the Hydraulic Profiling Tool you are able to:

• Locate and define better migration pathways for contaminants
• Discover specific regions for injection of remediation material
• Determine where to screen monitor wells
• Identify the aquifers and confining units

Additionally, the Hydraulic Profiling Tool can conduct static dissipation tests at individual depths. This data is used to determine static water level (or head pressure in confined aquifers) and hydraulic conductivity.

The Hydraulic Profiling Tool is ideal for:

• The starting point of a site investigation
• Locating migration pathways and confining units in conjunction with MIP (Membrane Interface Probe), UVOST®, or TarGOST® surveys
• Targeting precise depths and formations before remedial injection

Since our sensors can be deployed from any type of Geoprobe (ranging from all-terrain track rigs to confined-space dolly mounts) we can increase your reach in locations that would typically be difficult to access. High-resolution data produced from the HPT systems allows you to precisely select locations and depths for injections with greater confidence.