At both sites limestone cores were collected with significant core losses. The discrete quantification of chlorinated solvents in the retrieved limestone cores was compared to different FLUTe technologies at the DNAPL site and passive and active multilevel groundwater sampling at the plume scale site. Important information regarding contaminant distribution and potential presence of DNAPL was provided by FACT (FLUTe activated carbon technique) and Water-FLUTe mulitilevel sampling. The data was used to validate a model based tool for interpretation of the FACT field measurements, which allows the conversion of discrete activated carbon concentrations to aqueous concentrations at given hydraulic parameters and FACT parameters. The passive groundwater sampling with snap samplers resulted in significantly different concentration levels and concentration profiles over depth compared to the active sampling by separation pumping with heat pulse technology. The differences between the two techniques decreased with distance to the source area. Overall, the borehole characterization techniques provided an improved conceptual understanding of the contaminant distribution compared to the data obtained by quantification of chlorinated solvents in the limestone cores.
|Number of pages||1|
|Publication status||Published - 2015|
|Event||2015 NGWA Conference on Groundwater in Fractured Rock - Burlington, Vermont, United States|
Duration: 28 Sep 2015 → 29 Sep 2015
|Conference||2015 NGWA Conference on Groundwater in Fractured Rock|
|Period||28/09/2015 → 29/09/2015|