The tailing dump of the Komsomolsk gold-mining plant is considered. The aim of the work is to study the composition of mining waste and the directions of migration of drainage using electro-tomography and geochemical methods, as well as determining the variability of electrophysical parameters and composition of the man-made environment depending on temperature. The results of a laboratory experiment to determine the concentrations of CS2, C2H6S, (CH3)2SO above the surface of the waste substance are given.