In situ remediation cleans hydrocarbon-contaminated soil

Twin, hollow-shaft augers drill into contaminated soils to mix in nutrients that degrade hydrocarbons. An Arizona company used a new in situ bioremediation technology to clean up 3,600 cu yd of soil contaminated with diesel fuel and waste oil from leaking underground storage tanks. The Dual Auger soil mixing and bioremediation system injects microorganisms and nutrients into the soil while churning the soil to depths as great as 100 ft. In this manner, the additives biologically degrade contaminants in place. The process was developed by In-Situ Fixation Inc., Chandler, Ariz. Process description According to an In-Situ Fixation press release, "The system greatly increases the e...

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