Measuring and testing – With fluid pressure – Leakage
Patent
1993-02-09
1995-09-05
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 407, 73 2335, G01N 102, G08B 1900
Patent
active
054470552
ABSTRACT:
A system for automated soil gas sampling, analysis and reporting to determine the presence and magnitude of a fluid leak from fluid storage vessels by detecting the presence of a unique and identifiable tracer chemical in the fluid leak. The system includes an array of sampling probes disposed in earthen material supporting fluid storage vessels. Each of the sampling probes is connected to a first valve selectable between individual sampling probes in the array. The first valve is connected to a second valve which communicates a gas sample from the first valve to a sample loop and loads the gas sample into the sample loop. Switching of the second valve from the first valve to a carrier gas source introduces a pressurized carrier gas into the sample loop displacing the gas sample out of the sample loop and into a gas chromatograph for analysis. A process controller governs all switching functions of the valves, actuation of the vacuum pump and the gas chromatograph in accordance with a pre-programmed instruction set. Data output by the gas chromatograph is processed to determine the presence of a tracer in the soil gas sample and actuate a signal flag indicative of the presence of the tracer chemical in the soil gas sample.
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Evans Owen D.
Pfeil William E.
Thompson Glenn M.
Rosenbaum David G.
Tracer Research Corporation
Wiggins J. David
Williams Hezron E.
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