EVALUATION OF THE EFFICIENCY OF FREE PHASE REMEDIATION IN A FUEL RESEARCH DEVELOPMENT IN THE PERIOD 2012 – 2016
Environmental liability, Fuel retail outlets, Free phase, Remediation.
Activities involving fuels of petroleum origin are liable to serious environmental risks when associated with the contact of these products with the environment by any means of entry, including corrosive processes in underground storage tanks for liquid fuels at reseller stations. The objective of this research was to evaluate the efficiency of free-phase remediation in a fuel resale business from 2012 to 2016. The study of the free-phase thicknesses in the monitoring wells as a function of the remediation systems denominated as Multiphase Extraction and Dual Phase, applied in the area by signing a term of adjustment of conduct between the entrepreneur and the Public Prosecutor, with the purpose of correcting the environmental liabilities arising from the activities developed by the enterprise. In the monitoring wells, attenuation was observed in the free phase thicknesses, a factor associated with the positive response to the application of remediation in the area. It was also observed an inversely proportional relationship between the free-phase thicknesses and the rainfall index of the region and it can be observed that rainfall is a factor that interferes with the remediation result. After 29 months of pumping, 2000 m³ of groundwater were treated and 2,469.79 liters of combustible product were recovered, demonstrating the efficiency of the techniques applied in the area as effective mechanisms in proposing the remediation of areas contaminated with fuels of petroleum origin.