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Abstract

Summary

This study investigates hydrocarbon contamination at a former military site using an integrated approach combining geochemical and geophysical surveys. Electrical resistivity tomography (ERT), time-domain induced polarization (TDIP), and complex resistivity (CR) methods were employed along with elastic wave refraction surveys to delineate contamination zones and bedrock structures. Borehole data and groundwater measurements provided ground truth for interpretation. Five phases of field surveys were conducted, with 2D and 3D inversion applied to evaluate subsurface conditions. While ERT alone had limitations due to shallow groundwater and biodegradation effects, IP and CR methods effectively captured contamination-related anomalies. Chargeability and phase data from 3D inversion matched well with TPH distributions identified through borehole analysis. The results demonstrated that geophysical anomalies corresponded with key contamination zones, especially in areas influenced by fuel tanks and maintenance facilities. This integrated methodology proved valuable for understanding the spatial distribution of hydrocarbon plumes and emphasized the importance of geological context in interpreting geophysical signals. The study supports the use of advanced inversion techniques and multi-method geophysics in near-surface environmental investigations.

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2025-09-07
2026-02-06

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Interpretation of Hydrocarbon Contamination Distribution using Integrated Electro-Electronic Monitoring and Elastic Wave Survey
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202520155
/content/papers/10.3997/2214-4609.202520155
/content/papers/10.3997/2214-4609.202520155
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