Remedial options for creosote-contaminated sites

Free-phase DNAPL recovery operations are becoming increasingly prevalent at creosote-contaminated aquifer sites. This paper illustrates the potential of both classical and innovative recovery methods. The UTCHEM multiphase fl ow and transport numerical simulator was used to predict the migration of c reosote DNAPL during a hypothetical spill event, during a long-term redistr ibution after the spill, and for a variety of subsequent free-phase DNAPL r ecovery operations. The physical parameters used for the DNAPL and the aqui fer in the model are estimates for a specific creosote DNAPL site. Other si mulations were also conducted using physical parameters that are typical of a trichloroethene (TCE) DNAPL. Dramatic differences in DNAPL migration wer e observed between these simulations.