Daniel B. Stephens & Associates, Inc.

Mark E Burkhard

Mark D Ankeny

A method and apparatus for hydraulically isolating a volume in porous unsaturated material, such as soil. Air is forced through a permeable layer of material adjacent to the volume to be hydraulically isolated. The air flow through the permeable layer creates a water potential gradient. This causes water to migrate from more saturated areas which in turn would allow hydraulic isolation of any unsaturated area.

Means and method for hydraulically isolating unsaturated zones in soil

An apparatus and method for determining physical and chemical properties of a porous medium such as soil or rock. A sample of porous medium is held within a container. Conditions regarding the sample are sensed, including but not limited to weight, temperature, pressure, and humidity. Conditions at the sample can be brought to equilibrium or varied according to instructions. A control system can adjust or equilibrate the conditions according to desire and according to which properties or relationships between physical and chemical properties are desired to be derived.

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Albuquerque, NM, United States of America

Mark E Burkhard