Fluorescent Dye-Tracing Used to Investigate Preferential Flow Paths in a DNAPL-Contaminated Aquifer(Abstract)

摘要

Geologic conditions at a dense, nonaqueous-phase liquid (DNAPL)-affected site located in New York State limit the use of conventional hydrogeological investigation techniques to evaluate preferential ground water flow paths and velocities from source areas to an area of concern beneath an active industrial facility. It is often difficult to establish hydraulic connections between different contaminant sources and various areas of concern using conventional techniques such as ground water contouring or chemical “fingerprinting”. We therefore evaluated the feasibility of using fluorescent dyes in a heavily NAPL-contaminated aquifer to evaluate potential sources and possible associa- tions of DNAPL, LNAPL, and the aqueous phase to identify and map preferential ground water flow paths.