This presentation provides an overview of a major field focused program of studies aimed at improved investigation methods and understanding organic contaminant source zones and plumes in fractured porous sedimentary rock. This research began in 1997, when intensive field studies were initiated at a TCE contaminated site on steeply dipping and faulted sandstone in California. Now, with collabor...

cleanup. Major compounds that have been shown to increase the solubility and thus the mobility of nutrients Mobile organic sorbents (MOS) such as dissolved and colloidal and contaminants are surfactants (Edwards et al., 1991; phase organic matter control flow of water and transport of solutes in soils. We studied the effect of MOS on contaminant fate by systematic Haulbrook et al., 1993; Rahman...

This review focuses on progress in the development of transport models for heterogeneous contaminated aquifers, the use of predicted contaminant concentrations in groundwater for risk assessment for heterogeneous human populations, and the evaluation of aquifer remediation technologies. Major limitations and areas for continuing research for all methods presented in this review are identified.