n Journal of Emerging Trends in Engineering and Applied Sciences - 2-D geo-electric evaluation of soil contamination by surface oil and gas tanks in sedimentary formation

Volume 2, Issue 2
  • ISSN : 2141-7016
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A geophysical survey was carried out to determine the level of soil contamination by hydrocarbon resulting from the commercial activities of the downstream oil and gas sector within Apapa area of Lagos state, Southwestern Nigeria. Three geophysical methods were used: Self Potential SP; Induced Polarization IP and electrical resistivity. These methods were carried out in four traverses with one traverse used as control site. The results of the integrated approach revealed that the topsoil is majorly semi-permeable to permeable and are characterized by low resistivity values while the high IP values are associated with clay formation. Analysis of the results from the tank sites revealed no significant differences when compared with the result from the control site, an indication that the soil may not have been contaminated by the hydrocarbon.

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