The ecological situation in most mining regions of Ukraine is critical, and the closure of unprofitable mining enterprises, mines and cuts creates the environmental problems associated with significant changes in the geological and hydrological environment. The purpose of the work is the environmental monitoring of heavy metals in the soils in the territory of Rozdil State Mining and Chemical Enterprise (SMCE) "Sirka" at the stage of liquidation.The object of the study involves the heavy metals in soils in the territory of Rozdil SMCE "Sirka". The subject of the study is to evaluate the content of heavy metals and migration aspects in soils. In this work, the parameters of soil pollution with heavy metals were determined experimentally. On the example of Rozdil SMCE "Sirka", the main problems of the monitoring system of the territory of the mining and chemical enterprise at the stage of liquidation were proven. The influence of the mining and chemical enterprise on the state of environmental pollution (soil, water environment, and waste management status) was also assessed. The ecological balance of the territory is violated due to the fact that the elimination of negative technical manifestations of the enterprise activity was considered unprofitable for a long time. The development of monitoring techniques for man-made landscapes, along with the development of methods for diagnosing the specifics of their functioning and technologies for reclamation, is an integral part of multidisciplinary research on environmental imbalances, which is caused by the transformation of natural landscapes into man-made. The necessity of developing the information-analytical system for the monitoring of the Rozdil State Mining and Chemical Enterprise (SMCE) "Sirka" territory at the stage of liquidation was substantiated. It was established that the monitoring of the territory of the mining and chemical enterprise at the stage of liquidation will allow increasing the level of environmental safety of the territory of the enterprise and the surrounding settlements. Monitoring is one of the main stages of the liquidation and reclamation process and should be carried out at all stages of liquidation. In addition to the monitoring system in the process of liquidation and in the post-reclamation period, the liquidation project should include an environmental analysis of the enterprise activities and environmental forecasting.

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This study is dedicated to the assessment of the heavy metal pollution of soil by determining the category of soil contamination due to the activities of mining and chemical enterprise. The X-Ray Diffraction method was used experimentally to determine the qualita-tive and quantitative composition of heavy metals and other inorganic elements in samples, soil pollution with heavy metals. Main sources of heavy metals in industrial waste are identified. The environmental pollution with some heavy metals (Sr, Cr, Pb, Zn, Cu, Mn) was assessed and exceeded the MPC. The ecological situation of soil contamination with heavy metals near tars on the study area territory is estimated in the category from permissible pollution to hazardous pollution. Soil near the phosphogypsum dump is classified as an acceptable, moderately dangerous, and dangerous category of soil pollution. It was established that at a distance of 20 m from the tailings the soils belong to the dangerous category of soil, closer to the tailings -to moderately dangerous. The value of the concentration coefficient indicates the activity of leaching processes (C c < 1) and accumulation (C c > 1) of substances in the genetic horizons of the soil. It is necessary to forecast the state of the environment in the area of influence of these enterprises to develop effective means of ensuring environmental safety.

An analysis of the quality of surface water of State Enterprise Rozdil Mining and Chemical Enterprise 'Sirka' was carried out. It was established that in order to ensure ecological balance in the zone of influence of this enterprise, it is necessary to conduct regular monitoring observations, maintenance, supervision and control over the condition of hydraulic structures, elimination of sources of pollution. The obtained research results indicate that there is a need to create an information and analytical monitoring system in order to effectively store, process, and analyze the data based on the principles of comprehensive environmental monitoring for the collection, storage, and processing of data on pollution of various elements of the environment, which will provide forecasting of environmental changes in the territory of the mining and chemical enterprise. On the basis of the obtained research results, a web application was created based on an interactive map of water sampling points, visualization of the obtained results of hydrochemical monitoring of Rozdil Lakes, and a forecast of the state of the water environment.