Soil decontamination
 An improved process for the remediation of soil contaminated by the presence therein of organic or semi-volatile inorganic contaminants which comprises (1) supplying thermal energy to the soil at one or more locations under the surface of the soil, (2) collecting the vapors resulting from contaminant vaporization or decomposition under the influence of the thermal energy, after passage horizontally through the soil, at one or more locations under the surface of the soil and separating from the collected vapors the environmentally undesirable components thereof. 
Shell Oil Company
E E E Y B B
E21B E21B E21B Y10S B09C B09C
inventional inventional inventional additional additional inventional
James D. Paul C. Dallas L. Charles C. Arthur L. Stephen M. George M. Arnold R. David A.
Colthart Johnson Byers Chou Otermat Stearns Deeley Marsden, Jr. Weingaertner