Hollow Stem Auger 

• Regardless of the Drilling Method, Split Spoon Sampling (with N-Values), Shelby Tubes and CME Samples can be Obtained.

• The Holes can be Abandoned by Back-Filling with Native Materials or Grouting, or a Piezometer/Well can be Installed.

• Hollow Stem Augers Having Diameters of 2.25 in. to 4.25 in. are Typically used, but Larger Diameters, up to 12.25 in. I.D., are Available Upon Request.