In this study, the contamination status of soil and groundwater in Nanjing 1211 Chemical Plant are
ascertained: the origin of pollutants is confirmed and the spatial distribution of underground pollutants is
delineated. Results show that the high-density resistivity method is very effective in delineating organic
pollution in soil and groundwater. Four kind of array were tested (Wenner Array, Schlumberger Array,
Pole-Pole Array and Dipole-Dipole Array) and helped to determine the pollution plume, with better
results obtained with the Wenner Array, Pole-Pole Array, and Dipole-Dipole Array.