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Exxon Mobile Corporation | Lakeland, Florida | 1997 - 2006
The ElectroPhos site is a former elemental phosphorus production facility located near Mulberry, Florida. The ElectroPhos facility began operation in the 1950s and produced elemental phosphorous until 1983, when operations were suspended. Elemental phosphorous was produced at the facility by electro-arc reduction of low-grade phosphate ore from nearby mining operations.
Due to concerns by the Florida Department of Environmental Protection (FDEP), BCI was retained to assess ground water and surface water conditions to determine impacts by phosphorus from former phossy waste ponds on the property. An extensive contamination assessment, risk assessment, and remedial alternatives analysis was completed between 1997 and 2001.
From 2002 to 2004, BCI designed and managed the construction of a new containment system for the site. The project consists of installation and construction of a soil-bentonite slurry wall and HDPE cap system surrounding the former phossy ponds, which covered an area of approximately 42 acres. The slurry wall was keyed into a low-permeability soil layer that occurs at depths of approximately 40 feet to 62 feet below grade. The slurry wall was constructed by the slurry trench method, and had a minimum width of 2.5 feet over a length of approximately 6,010 feet.
The project involved significant health and safety issues, and required a Health and Safety Plan to address potential site worker exposures to elemental phosphorus and associated compounds throughout duration of the project. Following construction, BCI conducted regular ground water and surface water monitoring to verify performance of the site closure.
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