Deposits arising from industrial waste disposal operations represent a long-term pollution risk as potential release points of various pollutants, including metal(loid)s, with the ability to severely contaminate soils, surface and groundwater in the region, even decades after their disposal. Project FORtIS aims to address the environmental impact of four different industrial waste deposits enriched in metal(loid)s using, inter alia, their leachates features. The location of interest will include the coal ash deposit and the ash deposit of the former sulphate cellulose factory as waste materials of high hazard score, the scrapyard of the steel factory as waste materials of medium hazard score, the ex-alumina factory deposit as waste materials of moderate hazard score.Specific objectives of the project will include the investigation of 1) the basic characteristics of the waste and surrounding soils, 2) the geochemical and mineral characteristics of waste and surrounding soils, 3) the chemistry of waste and soil leachates, 4) the ecotoxicological features of waste and soil leachates, and the assessment of 5) the potential environmental impact. Transport, fate and toxicity of metal(loid)s released from mentioned industrial waste deposits will be investigated through a set of physico-chemical, morphological, mineralogical, geochemical and biological parameters as well as the geochemical modeling and risk assessment. Results of the research will contribute to the understanding of the modes of occurrences of metal(loid)s released from investigated and similar waste deposits, processes and mechanisms that influence their environmental cycling, as well as more detailed insight into their bioreactive forms. The results of the FORtIS project will present an important contribution to the knowledge necessary to determine and implement strategies aimed at minimizing the negative environmental impacts related to deposition of industrial wastes enriched in metal(loid)s.