G - Physics – 01 – M
Patent
G - Physics
01
M
73/118
G01M 3/00 (2006.01) G01M 3/32 (2006.01)
Patent
CA 2036254
METHOD FOR STORAGE TANK LEAK DETECTION HAVING GROUND WATER COMPENSATION ABSTRACT OF THE DISCLOSURE A method is described for enabling leak detection of an underground storage tank surrounded by a water table. The method begins by sealing a test probe in the tank, the test probe having an elongated substantially hollow core with first and second ends, a housing for receiving the second end of the hollow tube and being vented to the fluid product, a low temperature coefficient medium supported in the substantially hollow core of the elongated tube, and a liquid seal supported in the housing between the medium and the fluid product. The method continues by then establishing and maintaining a pressure equilibrium between the hollow core of the test probe and the head space. An inert gas such as nitrogen is then introduced into the head space to overpressurize the head space by an amount sufficient to reestablish a leak at any break in the storage tank despite presence of the water table surrounding the storage tank. Once the tank contents are stabilized, the precision leak test is performed. - 17 -
Kaneb Metering Corporation
Kirby Eades Gale Baker
Lagergren Peter J.
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