In order to make our probes more effective in the northwest's soil formations we decided to replace the standard GH-42 hammer with a 165 pound Stanley hammer. The result has been faster and deeper holes with less refusal. The heavier hammer also enables us to quickly core through asphalt and concrete using a carbide tip drill steel and the Geoprobe rotary box.

Our modified Geoprobe 5400s are ideal for environmental site investigations, maintaining a low site presence and generating far less soil and water waste than conventional drill rigs.. They are set up to do continuous soil sampling (using 4-foot or 5-foot samplers), groundwater sampling, soil vapor samples and insitu-remediation injections. For water sampling we have both vacuum pumps and peristaltic pumps on all or our probe units. With 2.25-inch casing, the Geoprobe 5400s can install 3/4-inch prepacked monitoring wells and 1-inch piezometers, vapor extraction wells or sparge points. High pressure grout pumps are available for deep holes and sensitive sites.

• Geo-Tech currently has three modified Geoprobe 5400 rigs:
    - Box Trucks - Provide lighting and covered fold out work benches
    - F550 truck - 4x4 with an enclosed box and self contained decon unit
    - F350 truck - 2 wheel drive with trailer mounted decon unit
    - F350 van - for low clearance jobs, onboard compressor and trailer mounted decon unit
• Environmental, Geotechnical
• Standard Geoprobe system custom fit with a 165 pound Stanley hammer
• 28,000 pounds of pull back
• Core through concrete and asphalt
• Vacuum pumps and persistaltic pumps for groundwater sampling
• Onboard and trailer mounted decon units
• Set 3/4 prepacked screen monitoring wells and 1-inch sparge points and vapor extraction wells
• Able to work indoors if space allows
• High pressure grout pumps available