Augering Answers

by David Cook, (M.ASCE), Senior Engineer; Klein Felder, Inc. Sacramento, CA,
Clark Zenobia, (M.ASCE), Operations Manager; Klein Felder, Inc. Sacramento, CA,


Serial Information: Civil Engineering—ASCE, 1989, Vol. 59, Issue 12, Pg. 50-51


Document Type: Feature article

Abstract: Leaking storage tanks, a long time environmental problem, are now being addressed nationally with cleanup regulations. Clearly, inexpensive and quick remediations are needed. This article discusses how the auger method was used to remediate tank contaminated soils at a northern California service station. The automotive service station had to be relocated to allow for expansion of the shopping mall. Upon examination of the soil, it was found that benzene was the principal contaminant. Out of the available options, the large diameter auger excavation was selected for three major reasons: safety, logistics and environmental protection. For instance, the auger method: 1) Reduced rain infiltration; 2) reduced vapor emissions; 3) allows movement of construction equipment without the threat of soil collapse; and 4) eliminates shoring and excavation expenses. Sixty-two 6 ft diameter cylinders were excavated with an auger drill and then backfilled with a cement slurry mix. Within two months, 3,600 cubic yards of soil were removed and biologically treated on-site. While the auger drill remediation is not applicable to every tank location, it is an option that should be explored prior to selecting a remedial solution.

Subject Headings: California | Construction equipment | Environmental issues | Excavation | Petroleum | Pollution | Soil treatment | Storage tanks

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