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Superfund Program Implements the Recovery Act

Sigmon's Septic Tank

Statesville, North Carolina

Site Description
The Sigmon’s Septic Tank site is located approximately five miles southwest of Statesville, NC.  The site, which covers approximately 15.35 acres, is in a rural area where the primary source of drinking water is private and community wells.  From 1970 to 1995, the owner of the site pumped residential, commercial and industrial septic wastes and sludges; installed and repaired septic tanks; and provided a variety of industrial waste removal services.  Eight to ten unlined lagoons were used to hold the septic wastes.  The lagoon sludges were excavated and piled adjacent to the lagoon area.  The site’s affected media are soil and ground water.  Vanadium is the most significant soil contaminant.  Ground water contaminants above the Maximum Contaminant Level in the monitoring wells are arsenic, manganese, iron, vanadium and 1,4 dichlorobenzene

Cleanup Activities to Date
EPA placed the site on the National Priorities List in 2005, and completed a short-term removal action in 2006 to install filters on residential wells in the site vicinity.  In 2006, EPA selected the cleanup plan addressing the site’s contaminated soils, including stockpiles.  EPA estimates that the total soil disposal volume will be 12,000 cubic yards, an amount which is based on an estimated 1,400 cubic yards in the soil waste piles and underlying soil, and 10,600 cubic yards of vanadium-contaminated surface soil located on-site and off-site.  EPA will address the ground water cleanup approach for the site in a separate cleanup plan.

Recovery Act Project Activity
EPA will use the $216,493 in Recovery Act funding to begin cleanup activities to address the contaminated soil. After being excavated, EPA will dispose of the contaminated soil off-site. EPA will backfill and re-vegetate the excavated area.

Excavation of former stockpile areas and of areas containing other non-hazardous material; groundwater investigation which included the installation of several groundwater monitoring wells. All activities designated for ARRA funds have been completed in FY2009 and the site is construction complete.

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