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Superfund Program Implements the Recovery Act

Standard Chlorine of Delaware, Inc.

Delaware City, Delaware

Site Description
The Standard Chlorine of Delaware, Inc. site is a former chemical manufacturing plant located in an industrial area in New Castle County, DE, three miles northeast of Delaware City. Chlorinated benzene compounds were made on the 40-acre site from 1966 to 2002.  As a result of those activities, chlorobenzenes from spilled material have been found in the ground water, soil, sediments and surface water.  Wetlands near the site are also contaminated.  In 2002, the site's owner declared bankruptcy and abruptly closed the facility, leaving an additional 40 million pounds of chlorobenzenes and related chemicals in insecure tanks, pipelines, process vessels and treatment systems.  Approximately 152,000 people draw ground water from public and private wells within a three-mile radius of the site and approximately 30 people reside within a mile of the site.

Cleanup Activities to Date
EPA added the site to the National Priorities List in 1987.  To evaluate and address it, EPA has divided the site into four parts or operable units (OUs).  EPA has implemented an interim ground water remedy under OU1.  This interim action includes containment and treatment of ground water; treatment  of air emissions resulting from the ground water treatment process; source removal of dense non-aqueous phase liquids (DNAPLs); and further investigation of ground water and DNAPLs.  Actions at this OU also include the removal and off-site incineration of approximately 1.3 million gallons of bulk liquid chemicals.  To date, EPA has removed approximately 3,400 totes of bulk liquid chemicals, with approximately 800 remaining on-site.  EPA is currently investigating the remaining OUs, which include spill soils, sediments and a final ground water remedy.

Recovery Act Project Activity
EPA will use the approximately $2.5 million in Recovery Act funds to complete removal of the remaining 800 totes of bulk liquid chemicals. In addition to completing the tote removal, EPA will use the Recovery Act funds to upgrade the ground water treatment system, while will reduce future years' funding needs.

Project construction work using Recovery Act funds was complete in 1Q FY2009.

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