修复氯化溶剂场地的工具和方法

Identifying and Delineating Hidden Sources Within a Larger Chlorinated Solvent PlumeKristin Robrock, Ph.D., P.E. and Peter Mesard, P.E., P.G., C.Hg.ExponentOakland, CAOutline •Commingled plume problem at site•Methodology•Results and suggestions for implementationCommingled Plume Problem•TCE, PCE, and other chlorinated solvents are commonly commingled at contaminated sites and in groundwater at industrial urban areas•How to distinguish and delineate where one plume ends and another begins?•Particularly difficult when different sites have released the same chemicalIs all this ours?•Site A being blamed for all TCE in plume•Objectives:•Is all this TCE from Site A?•If not, what are the other sources?•Can we delineate the extent of Site A TCE?Complicated site with multiple on-site sources•Site operated 1907 –present•Multiple vapor degreasers•Degreasers moved locations over time•Multiple different solvents over timeSite AGroundwater flow complicated by hydraulic divide•Groundwater divide due