Health & Environmental Research Online (HERO)


Print Feedback Export to File
5440265 
Journal Article 
Remediation life cycle at an EDC spill site 
Zhang, SA; Naus, J; O'Connor, MJ; Williams, DR 
1998 
BATTELLE PRESS 
COLUMBUS 
249-255 
English 
WOS:000075846300041 
Following a spill of ethylene dichloride (EDC) in 1986, the chemical migrated quickly into the underlying sand and gravel aquifer. An intensive remedial system was implemented, involving soil-vapor extraction, direct pumping from the base of the lower aquifer, groundwater pumping, and air injection to reduce EDC migration to the nearby river. By 1996, the observed EDC plume had been reduced to less than 2000 m super(2) in area, but a small amount of the compound persisted locally in the lower aquifer. The concept of remediation life cycle is described, which is based on the precept that remedial systems should be designed on the basis of predicted long-term changes in pumping rates and concentrations, rather than on the initial recovery requirements. Evidence is provided of the potential of natural degradation to achieve long-term remediation at the spill site. The findings suggest that the rate of mass recovery by active remediation becomes unacceptably slow, and that natural attenuation may be the way to go, but further evaluation is required. 
Environment Abstracts; ENV REMEDIATION; AQUIFERS; CHLORINATED HYDROCARBONS; BIOREMEDIATION; CHEMICAL SPILLS; GROUNDWATER; ENA 07:General 
Wickramanayake, GB; Hinchee, RE; 
1-57477-058-6 
1st International Conference on Remediation of Chlorinated and Recalcitrant Compounds 
MONTEREY, CA