U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

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Kansas Department of Health and Environment (KDHE), 2020

In Kansas, the former Coastal Refinery El Dorado Site encompasses ~420 acres containing several subareas: former main process area, former asphalt handling area, wastewater/stormwater ponds to the east, and former south tank farm. Primary contaminants of concern in site soil and groundwater include petroleum-related compounds (benzene, naphthalene, TPH), select VOCs, and isolated impacts from metals. Interim remedial measures completed between 2006 through 2014 include construction of groundwater, seep, and spring interceptor trenches; storm water collection structures; a tar removal treatment system; a wetland-based groundwater treatment system; and soil and waste excavation, stabilization, consolidation, and capping. The 2016 Corrective Action Decision document outlined the preferred remedial alternatives for the site: hydraulic containment via operation of existing and proposed trenches, the wetland-based groundwater treatment system, phytoremediation technologies, additional soil removal, surface water sampling, cap maintenance, environmental use controls, long-term monitoring, receptor management surveys, product recovery, MNA, natural source zone depletion, and continued operation of the existing groundwater and product treatment systems. Several of the remedy design documents—interceptor trenches, phytoremediation, tar treatment system—are available at,%20EL%20DORADO along with work plans and monitoring reports.

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