The main objective of source remediation is to reduce the mass, volume, or mobility of contaminants. Several
technologies have been used to treat source areas, including in situ thermal treatment , in situ chemical oxidation
(Seol et al. 2003), in situ chemical reduction (Soga et al. 2004), surfactant (or co-solvent) flushing (Mulligan et al.
2001), and in situ bioremediation. A performance evaluation of DNAPL source remediation using different
technologies indicated that none of the treatment technologies was able to reduce concentrations below maximum
contaminant levels throughout the source zone. The medianconcentration reduction of the chlorinated solvents was
approximately 88% (McGuire et al. 2006).