Abstract: An exhaust system and process for removing contaminant vapors from contaminated underground areas is described. The exhaust system includes a conduit directed underground with a lower end extending to the area of contamination and an upper end opening above the ground surface, a plurality of elongate perforated collection elements in communication with and extending angularly from the lower end of the conduit for receiving said vapors from the contaminated ground, a manifold connecting the collection elements to the lower end of the conduit and an exhaust means disposed in the upper end of the conduit for drawing the vapors into the collection elements from the area of contamination through the conduit and expelling the same into the atmosphere or into a suitable collection device.

Abstract: A recovery device for extracting liquids and vapors from subterranean strata and including a source of fluid, top and bottom conduits joined together at an angle to one another, and an inner discharge conduit disposed in the top conduit and connected to said fluid source to provide a stream of high speed fluid near the joinder of said top and bottom conduits to produce a strong suction force in the bottom conduit.