the complex entrapment of NAPLs in the soil at field
sites (Soga et al. 2004). The purpose of plume remediation is to reduce the area and contaminant concentrations of
the dissolved plume. Approaches for remediating dissolved contaminant plumes including pump and treat (Rivett et
al.2006), enhanced bioremediation, permeable reactive barriers, and natural attenuation (McGuire et al. 2004).
When only the plume is treated, the NAPL source remains inthe ground and continues to release contaminants for a
very long time.