DOI: 10.5176/2251-3361_GEOS12.75
Authors: Mohammad H. Makkawi, Dhahran, Saudi Arabia
Abstract: The groundwater system beneath a local hydrocarbon storage area has been impacted by Light Non-Aqueous Phase Liquid (LNAPL) leaked from facility operations. Hydrocarbon products were detected in nine out of fourteen monitoring wells installed around the facility. The floating LNAPL forms a pool of hydrocarbon compounds and acts as a continuous source of groundwater contamination. The thickness of LNAPL in the monitoring wells ranges between 6 cm and 40 cm. The existence of LNAPL might impact human health and ecological system if it migrates and expands to the neighborhood. This study is conducted to model and evaluate a practical corrective action to control the presence of LNAPL on top of the shallow aquifer. A skimming remediation alternative was selected to set a basis for the removal system's conceptual design in the site. The conceptual design suggested that several skimming wells should be installed in the site. Using a 2-year action plan, the efficiency of LNAPL removal system is estimated to be up to 75{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} of its total volume. System efficiency is dependent on the number of skimmers and their distribution in the site.
Keywords: LNAPL; Skimmers; Models; Water pollution and management
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