Date of Graduation

2000

Document Type

Thesis

Degree Type

MS

Committee Chair

K. Aminian

Abstract

The problem of underground contamination including contamination of potable water aquifers is more serious now than ever. Stringent pollution control laws as well as concern for the environment has given birth to the technology for remediation of contaminated soil and groundwater. The Research conducted thus has proposed a way to contain the contamination from underground storage tanks from spreading and travelling downwards using the principles of desiccation in in-situ formations. The desiccant barrier proposed here is the circulating air barrier (CAB) which utilizes the injection of dry gas or air to create an ultra dry zone in situ. Thus the injected gas carries along with it the moisture from the isolated zone so that any contaminant travelling in the desiccant zone must replace the previously removed water before they can mitigate any further. In order to utilize the CAB technology as a containment, it is highly necessary to evaluate the soil characteristics, porosity, permeability, drying rate etc. of the formation. The work presented here mainly deals with these issues as regards with sand type Ottawa silica size: 16-20. A comparison with the previously published work about smaller grain size sands is also presented.

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