The production of chlorinated solvents such as tetrachloroethylene and tetrachloromethane has resulted in large stockpiles of unintentionally produced persistent organic pollutants (POPs) including high content of hexachlorobenzene (HCB waste). HCB waste of 15,000 t arising from the production of chlorinated solvents at the Kalush factory in Ukraine was landfilled. In 2008, it was discovered that HCB and other pollutants were escaping from the landfill into local environment including the Sapogi-Limnytsia Rivers, tributaries of the Dniester River. This showed that the HCB waste was not appropriately contained and represented a threat to the Dniester River basin. A Presidential Decree of Ukraine was therefore issued requiring remediation of the site and excavation of the waste. Between 2010 and 2013, approximately 29,445 t of HCB waste and associated contaminated soil was excavated and exported to various EU countries for incineration. This excavation revealed that these wastes can corrode through their drums within a few decades with release of pollutants. Other sites at which chlorinated solvents were produced should therefore be assessed for possible similar pollution. Despite the remediation efforts and the excavation of the landfill, the Kalush area remains a POP-contaminated site requiring further assessment. A part of the waste was exported to Poland and is stored close to the Baltic Sea and is treated in an incinerator with small capacity over a time frame of years. This case and recent similar cases reveal that the control of POP waste for destruction even in EU countries needs to be improved.

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The development of chromatographic science in Ukraine is due to the widespread use of chromatography to solve practical problems. The centers of chromatographic research in Ukraine are in large cities: Kyiv, Kharkiv, Lviv, Odessa, and others. Along with the development of chromatographic research methods, analysis methods for control of food and agricultural raw materials, medicinal products, petroleum products, and determination of the environmental pollution state are created. Chromatography is used in medicine, pharmacology, biology, and other sciences.

Abstract. This article describes a method of determination potentially dangerous objects, that could be involved in pollution based on the specified riverbed monitoring point. A way to solve the problem is considered through the filtration and sorting potentially dangerous objects list algorithm, which applies facts database, that allows to determine a possible rived bed potentially dangerous objects list. There are a number on software models and methods, which allows to determine an approximate or exact rived pollutant spill point in case of determining dangerous and/or rising pollutant concentration level from below downstream. Such methods work by forecasting the situation, or direct analysis of the natural environment. These methods make it possible to find the point of toxic substances spillage on the riverbed. However, it is not possible to find the enterprise/factory that made such an emission. Such problem mostly solved using analytical way. A method, which allows to determine a possible list of riverbed pollution potentially dangerous objects has been developed. Current development validation is a series of test checks and simulations that show the correctness of the neural network. A practical realization is implementation of the river pollution forecasting system in emergency situations informational system, to make a functionality, that determines a possible polluting object list based on the selected point of release of hazardous substances. Method can also be used with methods that allow to determine an approximate or exact rived pollutant spill point to find the enterprise/factory that made such an emission.

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