n 2005 ANCO added Geoprobe® to our site investigation services with the acquisition of a Geoprobe® 54LT self-propelled tracked drill rig. This 35-inch wide, 7-foot tall, 1-ton machine uniquely collects 4-foot long soil cores to depths over 20-feet through 2.5-inch diameter bore holes.

A 4-foot long macro core is advanced into the subsurface. The macro core is lined with a disposable acetate liner to prevent cross contamination. The macro core is retrieved and the representative soil core is field screened. The macro core is fitted with a new liner and again advanced to a depth of 4-feet below surface grade. A 4-foot long, 1-inch diameter rod is attached to the top of the core and the macro core is advanced to a depth of 8-feet below surface grade. The core is retrieved and the representative soil core from the 4- to 8-foot interval is field screened. The process is continued to the desired depth or until refusal.

The hammer bits can penetrate asphalt and concrete but can not push through bedrock. The Geoprobe® also provides a time and cost effective procedure for collecting groundwater samples through temporary well points. Analytic results are available as soon as 24-hours after sampling, facilitating a speedy 72-hour turn around from the time of contract to preliminary results. Groundwater investigations via traditional permanent monitor wells are minimally 1-month undertakings.

ANCO employs a licensed soil borer to operate the Geoprobe®. A one-man operation makes the Geoprobe® a remarkably cost effective approach to soil and groundwater investigation.