The study examines the abiotic components of the ecosystem within the tailings storage facility of a decommissioned sulfur mining enterprise located in the territory of the "Roztochia" Biosphere Reserve. An assessment of the physicochemical properties of the surface soil layer was conducted, including density, solid phase density, porosity, actual acidity, humus content, and elemental composition. It was found that the studied soils are characterized by low porosity (41.56%), an almost complete absence of humus, and high concentrations of sulfur (28.55%) and calcium (68.83%). These characteristics create unfavorable conditions for the formation of vegetation cover. The results underscore the necessity of remediation measures to restore natural ecosystems and biodiversity.