Oil spillage Aquifers 1 Benzene 1 Benzene concentration 1 Clarias gariepinus 1 Climate change 1 Contamination 1 Fish mortality 1 Fracturing fluids 1 Groundwater contamination 1 Groundwater pollution 1 Groundwater resources 1 Hydraulic fracking 1 Hydraulic fracturing 1 Hydrogeology 1 Loamy soils 1 Risk perception 1 Sandy clay loam soils 1 Silt 1 Silt loam soils 1 Soil classification 1 Soil moisture 1 Soil pollution 1 Surface spills 1 Toxicity test 1 Waste lubricating oil 1 Water aquifer 1 absorption 1 aquifer 1 benzene 1