| Title: |
Natural Attenuation of the Lead Scavengers 1,2-Dibromoethane (EDB) and 1,2-Dichloroethane (1,2-DCA) at Motor Fuel Release Sites and Implications for Risk Management
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| Resource Type: |
document --> technical publication --> report
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| Country: |
USA
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| Year: |
2008 |
| Availability: |
EPA 600/R-08/107 September 2008
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| Author 1/Producer: |
US Environmental protection Agency (US EPA)
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| Author / Producer Type: |
Agency, regulator or other governmental or inter-governmental body
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| Format (e.g. PDF): |
PDF
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| Size: (e.g. 20mb) |
3
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EUGRIS Keyword(s): |
Contaminated land-->Contaminants-->Others
Contaminated land-->Remediation options-->MNA
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| Short description: |
The lead scavengers Ethylene Dibromide (EDB) and 1,2-Dichloroethane (1,2-DCA) were added to leaded motor gasoline to prevent the buildup of deposits of lead oxide inside internal combustion engines. Recent studies demonstrate that lead scavengers may persist for long periods of time in certain ground water environments.
Although it is theoretically possible that anaerobic biodegradation or abiotic degradation will remove EDB at a particular site, it is frequently difficult to prove that degradation is occurring based on conventional monitoring data. Compound Specific Isotope Analysis (CSIA) can be useful to recognize biodegradation and abiotic transformation of EDB ground water. Degradation is recognized and documented by a change in the
ratio of stable isotopes of carbon in the molecules of EDB that remain in the ground water after degradation.
The change in the ratios can put a conservative boundary on the extent of degradation that has occurred in
the ground water sampled by a particular well. This makes CSIA a useful tool to prove that degradation has
happened at field scale at a particular site.
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Submitted By:
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Professor Paul Bardos WhoDoesWhat?
Last update: 13/01/2009
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