After the first phase of remediation, in 2015, an exhaustive sampling process was initiated to accurately identify the areas that still had contaminating elements. The studies established that the greatest contamination of the land is associated with hydrocarbon compounds, lodged between 5 and 8 meters deep. These compounds run off through the sand, but when they come into contact with the water table – present throughout the land – they remain floating on it, so they do not continue to descend and remain in the strip where soil and water meet. Other elements found, such as pesticides and heavy metals, were mostly removed along with the removal of soil during the first stage of remediation, leaving low concentrations remaining.
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