Arthur Lamar Otermat

51144972, May 19, 1992

Mar 26, 1991

7/675377

Paul C. Johnson - Sugarland TX
James D. Colthart - Houston TX
Arthur L. Otermat - Houston TX
David A. Weingaertner - Houston TX
Charles C. Chou - Houston TX
Dallas L. Byers - Katy TX
Stephen M. Stearns - Richmond TX
Arnold R. Marsden - Houston TX
George M. Deeley - Houston TX

Shell Oil Company - Houston TX

B08B 500
B09B 300
E21B 4316
E21B 4324

134 21

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.

50767275, Dec 31, 1991

Jul 30, 1990

7/559771

Paul C. Johnson - Sugar Land TX
Arthur L. Otermat - Houston TX
Charles C. Chou - Houston TX

Shell Oil Company - Houston TX

B09B 100

405128

Moist, warm, clean air from a vapor treatment system is injected into wells which are screened only at the contaminated depth forcing vapor flow only through the contaminated region. Intermediate the injection wells is an extraction well which is also screened only at the contaminated depth. A vacuum is drawn on the extraction well drawing the flushing vapors from the injection wells and toward the extraction well through the contaminated soil thereby entraining some of the contaminants. The contaminants are preferably non-volatile hydrocarbons such as diesel fuel, aviation and jet fuel, crude oil or pesticides. The contaminated, flushing vapor is then treated and recycled. An MW/RF heating system heats the earth's surface and the contaminated soil, thereby enhancing volatilization of the contaminants and their removal via the vapor flushing system. By screening the wells only through the contaminated zone and controlling the flow of clean, moist, warm air through only the contaminated zone, thereby maintaining the contaminated zone in a moist state, the entire energy of the system is focussed on the contaminated region.

56605005, Aug 26, 1997

Dec 15, 1995

8/572915

Arnold Riley Marsden - Mount Vernon WA
David Alan Weingaertner - Framingham MA
Lynton William Robert Dicks - Houston TX
Arthur Lamar Otermat - Houston TX
Paul Carr Johnson - Fountain Hills AZ

Shell Oil Company - Houston TX

E02D 311
B09B 300
A62D 300

405128

A system for in situ decontamination of contaminated soil in a contaminated zone comprising: a. a metal section placed in the contaminated soil, b. a heating means attached to said metal section for heating said metal section, and c. an extraction system adjacent or near said metal section for withdrawing vapors and condensates generated from heating the contaminated soil.

52218279, Jun 22, 1993

Feb 12, 1992

7/834081

Arnold R. Marsden - Houston TX
Arthur L. Otermat - Houston TX
David A. Weingaertner - Framingham MA
Paul C. Johnson - Sugar Land TX
Lynton W. R. Dicks - Houston TX
Harvey B. Wilde - Houston TX

Shell Oil Company - Houston TX

H05B 334

219200

A soil heater assembly (SHA) utilizes for example, two or more, 5 ft by 10 ft heating sections rigidly bolted together. Each section contains three NICHROME heating elements encased in ceramic beads which are floatingly pinned to a 4-inch thick ceramic fiber insulation encased in NEXTEL cloth. The heating elements run across the entire length and width of the SHA, spaced approximately three inches apart. The heating sections are pinned to their respective 5 ft by 10 ft stainless steel support frame, which is made out of structural angles and flat bars, with pins running through the four-inch ceramic fiber insulation. Since the insulation is somewhat compressible and the pins are slideable therethrough, i. e. not fixed, the heater elements can move or "float" vertically to accommodate surface irregularities of the soil. Both heating sections and support frames are then positioned side-by-side on the ground, bolted together, and covered by another four inches of fiber insulation.

52716937, Dec 21, 1993

Oct 9, 1992

7/958844

Paul C. Johnson - Houston TX
David A. Weingaertner - Framingham MA
Lynton W. R. Dicks - Houston TX
Arthur L. Otermat - Houston TX
Arnold R. Marsden - Mount Vernon WA

Shell Oil Company - Houston TX

B09B 300
E02D 311

405128

An Enhanced Deep Soil Vapor Extraction Process and Apparatus utilizes heaters placed into the soil at least to the depth of contamination and a vapor/condensate extraction system that withdraws volatilized contaminant vapors from the subsurface and any condensate that collects in the extraction well. Depending on the rate of formation of condensate in the well, a second conduit may be placed inside the well for the collection and removal of condensate by a downhole pump or a suction device located at ground surface. The process is directed towards contaminants trapped in or below the normal groundwater level. Groundwater extraction wells are also employed to create a "cone of depression", or local draw-down of the groundwater to expose those soils that are normally water saturated and thereby permit decontamination of such soils. Conduits may be placed within the groundwater extraction wells for the purpose of extracting groundwater.