Journal of Engineering and Engineering Technology - JEET |INTEGRATION OF GEOPHYSICAL TECHNIQUES IN DETECTING UNDERGROUND STORAGE TANK: A CASE STUDY OF A PETROL STATION IN AGBOR

Paper Details

Title :INTEGRATION OF GEOPHYSICAL TECHNIQUES IN DETECTING UNDERGROUND STORAGE TANK: A CASE STUDY OF A PETROL STATION IN AGBOR
Author(s) : Molua O.Collins1, Morka, C. John2 and Ijeh O. Rufus3
DOI: https://doi.org/10.51459/futajeet.2025.03.01.44
Abstract:

This study assessed the application of geophysical methods in identifying buried storage tanks in a petrol station in Agbor Metropolis-Nigeria. The research applied GPR technology integrated with ERT data and magnetic surveys in identifying USTs in an urban context. Undeground storage tanks (USTs) in urban areas present considerable environmental threats, but their identification and evaluation are complex. This research assessed the efficiency of combining multiple geophysical methods for UST and an environmental survey for Agbor Metropolis, Nigeria. The survey used a dual 250 MHz GPR system, Multi-Electrode Resistivity Meter, and Proton Precession Magnetometer. The analysis involved geoprocessing software, including RADAN, RES2DINV, and Oasis Montaj. Results revealed 15 potential UST locations with depths ranging from 1.645 m to 1.978 m and diameters between 2.210 m and 2.667 m. GPR reflection amplitudes (0.912-0.995) strongly indicated metallic tanks. The EMI detected metal in 12 out of 15 sample points, with anomaly strengths of 0.912-0.999. ERT differentiated tank anomalies (49.345-55.678 Ω•m) from soil (82.345-91.345 Ω•m). Soil sampling showed TPH levels of 212.345-567.890 mg/kg, while groundwater TPH ranged from 612.345-767.890 μg/L. The results showed that integrating multiple geophysical methods significantly enhanced UST detection accuracy in urban settings with potential implications for environmental risk mitigation and urban planning. This research provided a comprehensive approach to detecting USTs in urban areas, highlighting the importance of integrated geophysical methods for ensuring environmental safety. The study proved that integrating multiple geophysical methods significantly enhances UST detection accuracy in urban settings. This approach effectively maps UST locations, assesses environmental risks, and prioritizes remediation efforts. The findings contribute to improved urban environmental management strategies, particularly in rapidly developing regions with limited regulatory oversight.

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