Abstract: Apparatus for detecting leaks in fuel storage tanks. A float suspended in the tank liquid determines liquid levels and transmits the liquid level information via an infrared beam to a probe processor in the upper portion of the tank. The probe processor stores a plurality of level indications for subsequent uploading to an external computer which analyzes the level information to generate leakage rate information.

Abstract: Disclosed herein is a novel composition of matter which is prepared by subjecting at least one woodlike particle, such as a sawdust particle and preferably selected quantities of sawdust particles to a special treatment. Each particle has a cellular structure including a plurality of interconnected, generally tubular cell walls composed in part of hemicellulose that are subjected to a selectively controlled thermolytic heating above about 280.degree. C. but not above about 380.degree. C. and preferably between 300+ C. and 360.degree. C. to cause the hemicellulose to be converted to an oil-like oleophilic and hydrophobic substance on the cell walls and reduce the thickness of the cell walls to render the particle and particles oleophilic and hydrophobic. The product floats on water, absorbs oil, for absorbing hydrocarbons on the surface of water, and is an improved fuel both without and with the hydrocarbons.

Abstract: Apparatus for detecting leaks in fuel storage tanks. A float suspended in the tank liquid determines liquid levels and transmits the liquid level information via an infrared beam to a probe processor in the upper port of the tank. The probe processor stores a plurality of level indications for subsequent uploading to an external computer which analyzes the level information to generate leakage rate information.

Abstract: The oil field lease management and security system and method of the present invention for monitoring oil field equipment and for communicating with authorized operators.