Practical aspects of hydrogeological investigations and assessment of the environmental components pollution in urban areas. Case study

Abstract

In the frame of the legislative regulations in Romania, the geological environment is defied as all geological structures from the top (topographical surface) up to the deep soil layers, the groundwater and the geological formations. It is considered that in overall geological structures from the topographic surface to a depth at which the human activities are presence or to the depth at which they significantly influence and directly the human development, this is the field of the environmental geology. This paper presents applied aspects regarding assessment methods of the geological environment, respectively hydro geological investigations in a case study. conducting in situ and laboratory investigations allowed the assessment of the state of pollution of the polluted land remaining after a fuel storage objectives were removed by demolition (underground tanks, pipelines, pumps and fuel distribution ramp). The main conclusions drawn from the investigations carried out lies in the identification of the significant pollution of soil and groundwater, with localisation in the area of the fuel tanks. By modelling the processes of the migration of the pollutants in the vadose zone was identified a ongoing process affecting strong the fist aquifer and exists the probabilities as the second aquifer developed in sandy formations (‘Mostistea’ sands) to be affected by the pollution by oil products. recommendations necessary for intervention in the shortest time, for restoration of the polluted area were made.