4.25 inch Hollow Stem Augers for soil sampling and groundwater monitoring

4.25 in. Hollow Stem Augers

4.25 inch Hollow Stem Augers for soil sampling and groundwater monitoring

The minimum hollow stem auger sizes recommended for installation of 2-inch diameter casing is 4.25 inches; however, larger hollow stem auger sizes may be necessary. The Environmental Protection Agency recommends the inner diameter of the auger be 3 inches to 5 inches greater than the outer diameter of the casing.

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