Chemistry: analytical and immunological testing – Process or composition for determination of physical state... – Leak detection
Patent
1983-11-29
1988-02-16
Richman, Barry S.
Chemistry: analytical and immunological testing
Process or composition for determination of physical state...
Leak detection
73 407, 436 56, G01N 102
Patent
active
047255510
ABSTRACT:
A method and apparatus for the rapid detection and pinpoint location of leaks in one or more of a plurality of subsurface fluid storage tanks. A quantity of tracer material such as a fluorinated halocarbon compound is mixed with fluids in each of the plurality of underground storage tanks. A first subsurface vapor pipe or conduit having an above-surface air inlet and a plurality of apertures therein is positioned in the backfill within the vicinity of the tanks and the above-surface inlet is used for conducting, drawing or sucking air into the air inlet pipe. A second subsurface sample or collection pipe having an above-surface pipe outlet and a plurality of apertures therein is also positioned in the vicinity of the tanks into the backfill. Air drawn down into the vapor pipe passes through the backfill and past a plurality of storage tanks and in close proximity thereto, and into the sample pipe. Any tracer which is leaking from the tank or tanks will be picked up and drawn into the sample pipe. The air in the sample pipe is tested for the presence of the tracer after water vapor is removed from the air sample.
REFERENCES:
patent: 3174329 (1965-03-01), Kauffman et al.
patent: 3837228 (1974-09-01), Nemeth et al.
patent: 4189938 (1980-02-01), Heim
patent: 4446329 (1984-05-01), Waller
Randall et al.; Suitability of Fluorocarbons as Tracers in Ground Water Resources Evaluation; Selected Water Resources Abstracts; PB277488; 11/77.
Ferber et al.; Demonstration of a Long-Range Tracer System Using Perfluorocarbons; National Technical Information Service; 1/81.
Gzybowsky Michael S.
Richman Barry S.
Tracer Research Corporation
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