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Working with frozen soil will almost always yield unacceptable results. One time I allowed a relatively small amount of frozen silty clay to be buried deep in a road fill. The material was approximately 15 feet below grade. I justified it in my own mind that if the frozen soil is thoroughly...

A hole is drilled using solid-stem or hollow-stem augers to a specified depth. A split-spoon sampler at the end of some drill rods is then inserted through the hollow stem augers (solid-stem augers are withdrawn from hole prior to sampling). With the sampler resting at the bottom of the hole...