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Attenuation of Oil Pollution as Observed by VES Monitoring ProgramNormal access

Authors: F. Chitea, D. Ioane, P. Georgescu, A. Serban, I. Tolbes and C. Tolbes
Event name: Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics
Session: Environmental Geophysics II - Poster Session
Publication date: 08 September 2014
DOI: 10.3997/2214-4609.20142093
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.2Mb )
Price: € 20

Summary:
Oil pollution is known to be among the environmental problems which cause long – term negative effects on soil and underground water. Crude oil can be framed into light-non-aqueous-phase-liquids class (LNAPL), having a density lower than the water. Its mixture with water can be achieved in special conditions of temperature and pressure. When oil products reach the ground water, three pollution phases results: - Separated Hydrocarbons Phase (PSH) – forms a layer or lenses of hydrocarbons, floating on the top of water -Dissolved Phase Hydrocarbons (PDH) – resulted from hydrocarbons soluble fractions -Volatile Phase Hydrocarbons (PVH) - resulted from oil volatile compounds Standard analyses for monitoring an oil contaminated area consist in measuring the volatile compounds and hydrocarbons soluble fractions. As such a monitoring program requires financial effort, a less expensive and faster monitoring program was tested. By using noninvasive electrical resistivity investigation method repeated at a interval of 5 months, attenuation of oil polluted area could be observed. Electrical resistivity results were confronted with BTEX and HC results from water probes, showing good applicability of VES in investigation oil-pollution environmental problems.


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