Services | Continuous Core Sampling

Continuous Soil Sampling
AKA Dual Tube Soil Sampler (DT32)

The DT32 system allows the user to perform dual tube type soil sampling using 3.25” probe rods. This type of sampling is recommended with the Geoprobe 6610DT rig. The following steps are demonstrated in the display:

A. The tool string is driven from ground surface to fill the first inserted liner for continuous soil sampling from surface to 5’ below graded surface (bgs).

B. The soil sample is retrieved with inner rod string to remove the inner Sheath with the inserted sample liner containing the soil sample.

C. New liner and additional lengths of inner rod and outer casing are added to tool string.

D. The tool string is once again driven to fill liner with soil.

E. The second soil sample representing the 5’ to 10’ bgs interval is retrieved with inner rod string. This process is repeated until desired sampling depth is reached. When the last sample has been retrieved, the outer casing is removed and bottom-up grouting is performed.

Discrete Soil Sampling and Monitoring Well Installation with the DT32 Soil Sampling System

The DT32 system allows the user to perform dual tube type soil sampling (continuous or discrete) using 3.25” probe rods. This type of sampling is recommended with the Geoprobe 6610DT rig. The following steps are demonstrated in the display:

A. The DT32 System is driven to a predetermined depth with the DT32 Solid Drive Tip and expendable cutting shoe.

B. The Solid Drive Tip is removed with the inner probe rod string.

C. The Sample Sheath and liner are lowered into place.

D. Continuous soil sampling is now possible from 5’ to 10’ bgs.

E. The final soil sample is retrieved with the inner probe rod string.

F. After the final soil sample is removed, the prepacked screen monitoring well and PVC risers are installed. The 3.25” probe rods are retracted and the well is completed and developed.

Please refer to Micro Wells / Sparge Points and/or Piezometer Section
for additional information.