초록 ▼

Method and apparatus are described for detecting the leakage of fluid under storage tanks. A number of parallel perforated test conduits are placed under the tank which is to be tested for leaks. A vacuum is placed on the test conduits to remove gas and liquid, if any, from the soil beneath the tank

Method and apparatus are described for detecting the leakage of fluid under storage tanks. A number of parallel perforated test conduits are placed under the tank which is to be tested for leaks. A vacuum is placed on the test conduits to remove gas and liquid, if any, from the soil beneath the tank. If no gas or liquid is found it indicates that there is no leak. If gas or liquid is found, small test areas are isolated under the tank. The isolated areas may be placed under vacuum or pressure so gas and/or liquid can flow therethrough under pressure so that analysis of the flow in or flow out of the test conduit can be made to determine if that isolated area has leakage. The isolated areas can be changed until the isolated area with the leak is found.

대표청구항 ▼

A grid network system for testing for leaks in the bottom of a tank which sits on a layer of soil which comprises: a plurality of perforated horizontal test conduits buried under said tank in said layer, means to provide an isolated area relative to at least one of said perforations in at least one

A grid network system for testing for leaks in the bottom of a tank which sits on a layer of soil which comprises: a plurality of perforated horizontal test conduits buried under said tank in said layer, means to provide an isolated area relative to at least one of said perforations in at least one of said test conduits; and means to measure any inflow and/or outflow of fluids to or from said isolated area.