Patent Number: 6,254,311

Title: Removal of ground contaminents

Abstract: Removal of Light, non-Aqueous Phase Liquids (LNAPLs) from contaminated soils is expedited by injecting gas into extraction wells. The extraction wells are operated with a vacuum assist which produces a mounding of groundwater around the well. Gas is injected into the groundwater within the extraction well in the form of micro-bubbles. The bubbles rise through the LNAPL and volatilize it. The volatilized LNAPL is drawn to the surface and groundwater is left in the well.

Inventors: Manchester; Kenneth (Butte, MT)

Assignee: MSE Technology Applications, Inc.

International Classification: B09C 1/00 (20060101); E21B 043/18 (); B08B 005/04 (); B09C 001/00 (); B09C 001/02 ()

Expiration Date: 07/03/2018