||Natural attenuation of MTBE in the subsurface under methanogenic conditions /
Wilson, J. T. ;
Cho, J. S. ;
Wilson, B. H. ;
Vardy, J. A. ;
||National Risk Management Research Lab., Ada, OK. Subsurface Protection and Remediation Div. ;Coast Guard, Cleveland, OH. Civil Engineering Unit.
|| National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; U.S. Environmental Protection Agency, Office of Research and Development,
||EPA 600-R-00/006; EPA 600/R-006
Petroleum as fuel--Additives--Environmental aspects. ;
Butyl methyl ether--Environmental aspects. ;
Butyl methyl ether--Toxicology. ;
Ground water ;
Water pollution control ;
Fuel spills ;
Environmental persistence ;
Ecological concentration ;
Methanogenic bacteria ;
Microbial degradation ;
Subsurface investigations ;
Case studies ;
Natural attenuation ;
MTBE(Methyl Tertiary Butyl Ether) ;
Methyl Tertary Butyl Ether ;
BTEX(Benzene Toluene Ethylbenzene Xylene) ;
Elizabeth City(North Carolina)
||Region 9 Library/San Francisco,CA
||Some EPA libraries have a fiche copy filed under the call number shown.
||ix, 49 pages : illustrations ; 28 cm
This case study was conducted at the former Fuel Farm Site at the U.S. Coast Guard Support Center at Elizabeth City, North Carolina. The study is intended to answer the following questions: Can MTBE be biodegraded under methanogenic conditions in ground water that was contaminated by a fuel spill; Will biodegradation produce concentrations of MTBE that are less than regulatory standards; What is the relationship between the degradation of MTBE and degadation of the BTEX compounds; What is the rate of natural attenuation of the source area. The concentration of MTBE in the ground water was reduced from near 4,000 microgram/liter to less than 20 micrograms/liter within three years travel time along the flow path in the field, and within two years incubation in the laboratory. MTBE degraded after the BTEX compounds were completely degraded. The rate of natural attenuation of the source area was evaluated by comparing the flux of MTBE in ground water away from the source area to the total mass of MTBE in the source area. The instantaneous rate of transfer was 6 percent per year. At this rate of attenuation of the source, it would require approximately sixty years for the concentration in ground water in the source to reach 30 micrograms/l.
"January 2000." Includes bibliographical references (page 33). "EPA 600/R-00/006."