8e27de02_lls_in_Unconsolidated_Aquifers__1
[0] Hollow stem auger (HSA) [2] Place CMT tubing with anchor plate into borehole inside of hollow stem augers. Add alternating lifts of bentonite pellets and sand pack from surface as augers are removed. CMT tubing centralizers may be needed to keep annular space open during well construction. [3] Generally limited to depths of approximately 100 feet. Water may need to be added to augers to counteract heaving sand conditions. Use augers with at least a 4-inch internal diameter (ID). [1] 
Rigs widely available. Augers provide temporary casing that can be withdrawn as CMT well is constructed.
Summary of Drilling Methods & Techniques for Installing CMT wells in Unconsolidated Aquifers
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