LNAPL recovery model as a tool for detecting live oil leaks into the groundwater in a complicated site

This research focuses on an Iranian industrial area with a long history of oil contamination where oil spills occurred over time. Multiple techniques were utilized to determine the contamination source, including chemical, hydrogeological, and geological methods. The results indicated that the main reason for the leak was the rupture of several underground oil pipelines. After repairing the leaking points, the oil skimming method was used for site remediation. A new technique for detecting new live oil spills during remediation was identified using the Light Non-Aqueous Phase Liquid (LNAPL) Distribution and Recovery Model (LDRM). A comparison of the simulated and measured diagrams in some skimming wells showed that the recovery volume data did not match; originating an active leakage in the area that caused enhancement in the recovery volume despite ongoing oil recovery efforts.