Hollow Stem Auger is the most desirable method for drilling hazardous waste sites. This method allows you to drill through unconsolidated materials such as, sand, silt, clay and even minor cobble conditions.

Advantages of Using Hollow Stem Auger:
No drilling fluids required.
Eliminates formation collapse allowing sampling and well installation.
Ability to run Air Hammer once augering reaches refusal.

The technology employs flighted augers and a cutter head to advance the hole and bring drill cuttings to the surface. The hollow stem auger maintains borehole integrity and allows the driller to take soil samples and perform well installations.