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


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Fractured Bedrock Project Profiles

Last Updated: July 1, 2010

Point of Contact:
Judy Canova
SCDHEC-BLWM
2600 Bull St
Columbia SC 29201 
Tel: 803-896-4046 
Fax: 803-896-4292
Email: canovajl@
columb34.dhec.state.sc.us

Parachem Southern
Simpsonville, SC


Hydrogeology:

The site is located in the Piedmont physiographic province which consists of a layer of twenty to sixty feet of saprolite resting on bedrock. The bedrock consists of granite and biotite gneiss. The rock is more highly fractured near the transition zone between saprolite and bedrock.

Targeted Environmental Media:
  • - Fractured Bedrock

Contaminants:

The plume dimensions are approximately 700 feet wide by 2100 feet long and up to 160 feet deep.

Major Contaminants and Maximum Concentrations:
  • - Tetrachloroethene (var)
  • - Trichloroethene (var)
  • - cis-1,2-Dichloroethene (var)
  • - 1,1-Dichloroethene (var)
  • - 1,2-Dichloroethane (var)
  • - Tetrahydrofuran (var)

Site Characterization Technologies:

  • - Vertical Chemical Profiling
    • Packer Isolation
    • Multi-sampling port
  • - Fracture Trace Analysis
  • - Coring
  • - Other

Comments:
Very Low Frequency Survey (VLF)


Remedial Technologies:

  • - Pump and Treat
  • - Soil Vapor Extraction
    • In Unconsolidated Overburden
Comments:
A large part of the recovery system was in place when the site became listed on the NPL.Much of the source area has been excavated and removed and an SVE system has been installed.
Remediation Goals:

Contain the plume


Status:

As of 1/1/04 the pump and treat system has been optimized a number of times; however, there is no significant change in the plume size. Concentrations in the plume have been less than 1 ppm. A five year review is scheduled for 2004.

The first Five-Year Review (FYR) for the site was completed in September 2005 and raised a concern over how effective the ground water recovery system was in capturing the contaminated ground water plume. However, groundwater modeling by an EPA contractor in 2007 allayed some of this concern. A number of operational changes to the groundwater recovery and treatment system were completed in 2006-2007. Also in 2006 and 2007, a work plan for addressing the FYR recommendations was prepared, amended, and approved. Field work implementing the plan was performed and reported to EPA and South Carolina DHEC in 2008. System operations, semi-annual sampling, and monitoring continue in 2009.

Site cleanup activities are being led primarily by PRPs with oversight by EPA

EPA Superfund Five-Year Review Document
http://www.epa.gov/superfund/sites/fiveyear/f05-04027.pdf

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For more information on Fractured Bedrock, please contact:

Ed Gilbert
Technology Assessment Branch

PH: (703) 603-8883 | Email: gilbert.edward@epa.gov