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A Permeable Membrane Sensor For The Detection Of Volatile Compounds In SoilNormal access

Author: Thomas M. Christy
Event name: 11th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems
Session: Methods Emphasis: Developments In Direct Push Technologies
Publication date: 22 March 1998
Organisations: EEGS
Language: English
Info: Extended abstract, PDF ( 839.09Kb )

The large volume of site investigation workbeing performed since 1980 has spurred numerous attempts to improve
field methods of data collection. As part of this effort, GeoProbe Systems has developed two soil logging tools
which can be driven into soil to determine either lithology or contaminant concentration. These two tools are the
soil conductivity logging tool and the membrane interface probe. Both of these methods can be combined into the
same probe giving the site investigator a powerful means of collecting subsurface information. The soil conductivity
log of this probing tool is used to interpret lithology while the membrane interface probe is used to determine the
position and approximate concentration of volatile organic compounds (VOCs).
This paper will describe the principle of operation of the combined soil conductivity (SC) and membrane interface
probe (MIP). Data is presented in this paper from actual field use of
the MIP/SC logging system on fuel hydrocarbon and chlorinated
solvent contamination and comparisons are made to soil core analyses.

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