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FLUORESCENT DYES: A NEW WEAPON FOR CONQUERING DNAPL CHARACTERIZATION
Horst, J., N. Welty, R. Stuetzle, R. Wenzel, and R. St. Germain.
Groundwater Monitoring & Remediation 38(1):19-25(2018)

A new class of tools can provide high-resolution simultaneous characterization of DNAPL presence and aquifer permeability. These tools build on established optical screening and contaminant fluorescence technology that has proven ideal for real-time, high-resolution mapping of petroleum hydrocarbons, creosotes, and coal tar-based NAPLs. Now adapted to nonfluorescent organic NAPLs, the optical screening tools can dramatically improve the characterization of these challenging source zones. The application of this technology is illustrated in an example of a refined conceptual model for a highly complicated and mature DNAPL source zone. The refinement sheds light on details that will help future remedial action avoid failure due to conditions that otherwise might not be well understood. This paper is temporarily Open Access at https://onlinelibrary.wiley.com/doi/full/10.1111/gwmr.12261.



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