Abstract: Disclosed is a process and apparatus in which vacuum extraction is used to remove soil contaminants in both the saturated and vadose zones.

Abstract: A sealed bag of a pliable multi-layered barrier film substantially impervious to air is partially filled with generally spherically closed cell foam plastic particles deformable under a pressure of less than about 0.2 atmospheres. A bag for use in a typical camera is typically 2 to 3 inches wider and longer than the inside of the case and filled with particles from about 1/16 to 1/4 of an inch in diameter. When flattened uniformly, the bag with the particles inside is about 1/2 an inch in thickness. The bag is placed inside a camera case or the like of smaller dimensions than the bag, e.g. 14.times.6 inches when the pressure in the bag is atmospheric and relieved through an air tube. One or more objects are then depressed into the upper surface of the bag which deforms about them until about a single layer of particles is underneath the object and the particles surround the objects up to about an inch or an inch and a half in depth.

Abstract: A domestic hot water heating system which disables the normal aquastat during set-back periods where the temperature of the water source is sensed at the output manifold and the temperature of the water also is sensed a predetermined distance along the manifold to determine a demand or lack of demand for hot water. The system will enable the aquastat during a set-back period when demand is made and disable the aquastat when there is no longer a demand.