Remediation Technology Demonstration Project Profiles
Reductive Dechlorination (In Situ Bioremediation) at North Beach Disposal Area, United States Coast Guard Support Center in Elizabeth City, North Carolina
Last Updated: January 23, 2009 |
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| Site Identifying Information | ||
| Site Name, Location: | North Beach Disposal Area, United States Coast Guard Support Center, Elizabeth City, North Carolina, United States
(EPA Region 4) |
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| Cleanup Program: | Not Specified | |
| Entity Responsible for Cleanup: | Coast Guard | |
| Site Type: | Industrial Landfills | |
| Government Affiliation: | Federal | |
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| Project Information | ||||||||||||||||||||||||||
| Project Name: | Reductive Dechlorination (In Situ Bioremediation) at North Beach Disposal Area, United States Coast Guard Support Center in Elizabeth City, North Carolina | |||||||||||||||||||||||||
| Project Status: | Complete | |||||||||||||||||||||||||
| Contaminants Treated: |
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| Media Treated: |
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| Demonstration Technology and Type: | Reductive Dechlorination (In Situ Bioremediation) (In Situ Biological) |
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| Geology and Hydrogeology: | The aquifer is composed of surficial sand, and adjacent surface water bodies affect its flow and direction. Most of the contamination was present between 15 and 35 feet below ground surface (bgs). | |||||||||||||||||||||||||
| Demonstration Start Date: | 8/2006 | |||||||||||||||||||||||||
| Demonstration Completion Date: | 9/2007 (Actual) | |||||||||||||||||||||||||
| Demonstration Year: | 2007 | |||||||||||||||||||||||||
| Year of Publication: | 2008 | |||||||||||||||||||||||||
| Goal of the Demonstration: | The pilot study evaluated both molasses and lactate to support the following objectives: (1) define the optimal injection volume by performing injection tracer tests, (2) determine the optimal injection frequency and solution concentration to maintain the appropriate in situ carbon levels, (3) maintain a sufficient donor supply to achieve strongly reducing (methanogenic) conditions required for complete dechlorination, and (4) enhance the dissolution/desorption of sorbed phase contaminant mass. | |||||||||||||||||||||||||
| Design and Operations: | Two side-by-side pilot areas each tested one of the substrates, molasses or lactate. Each area consisted of one injection well and five monitoring wells at varying distances (5 to 10 feet) and directions from the injection well. Multiple injections were conducted. | |||||||||||||||||||||||||
| Performance Data Relevant to Demonstration Goals: | Both substrates were adequately distributed and supported the study's four objectives. Both substrates appeared to support enhanced dechlorination of PCE and development of a robust dechlorinating community. Following the first two molasses injections, pH decreased and significant concentrations of lactic acid were observed. | |||||||||||||||||||||||||
| Interesting Aspects or Significance of the Demonstration: | Treatment of Recalcitrant Compounds | |||||||||||||||||||||||||
| Lessons Learned: | Lactate appears to have a longer in-situ half-life than molasses. A full-scale application is being planned. | |||||||||||||||||||||||||
| Vendor(s) or Consultant(s) Associated with the Demonstration: |
ARCADIS |
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| Information Source(s) for the Demonstration: |
Martin, J.P. and others. 2008. Side-By-Side Field Testing of Molasses and Lactate for Enhanced PCE and PCP Biodegradation, Poster Session B4. Presented at the Sixth International Conference, Remediation of Chlorinated and Recalcitrant Compounds, Monterey, California (May 19-22, 2008). http://www.battelle.org/chlorcon |
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| Contact Information | ||||||||||||||||||||||||||
| Point(s) of Contact: |
Seth Ramaley ARCADIS, Inc. Atlanta, Georgia, United States |
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Abigail Faulkner ARCADIS, Inc. Raleigh, North Carolina, United States |
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Jason Namey ARCADIS, Inc. Raleigh, North Carolina, United States |
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Fred C. Payne ARCADIS, Inc. Novi, Michigan, United States |
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Jean Pierre Messier U.S. Coast Guard Elizabeth City, North Carolina, United States |
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Jennifer P. Martin (Primary Contact) ARCADIS, Inc. San Antonio, Texas, United States E-mail: Jennifer.martin@arcadis-us.com |
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