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Field Application of Resistivity and Spectral Time Domain IP to Investigate Geoelectrical Signatures of Free-phase PCE

Johansson, Sara LU ; Fiandaca, Gianluca and Dahlin, Torleif LU (2014) Near Surface Geoscience 2014 In 20th European Meeting of Environmental and Engineering Geophysics p.02-02
Abstract
Soils beneath former dry cleaning sites are often contaminated with the chlorinated hydrocarbons PCE and its degradation products, which are highly toxic and cancerogenic. In this study, resistivity and time domain induced polarization (DCIP) were measured at a former dry cleaning site in order to investigate if the source contamination of PCE could be detected. 80 meter long 2D-profiles were measured across the site with the ABEM Terrameter LS instrument. The DC and full IP decay data were inverted using the 2-D DC/IP inversion algorithm developed by Fiandaca et al. (2013), giving access to the spectral information contained in the IP decays. The inversion parameters DC resistivity (ρ), chargeability (m0), the relaxation time (τ) and the... (More)
Soils beneath former dry cleaning sites are often contaminated with the chlorinated hydrocarbons PCE and its degradation products, which are highly toxic and cancerogenic. In this study, resistivity and time domain induced polarization (DCIP) were measured at a former dry cleaning site in order to investigate if the source contamination of PCE could be detected. 80 meter long 2D-profiles were measured across the site with the ABEM Terrameter LS instrument. The DC and full IP decay data were inverted using the 2-D DC/IP inversion algorithm developed by Fiandaca et al. (2013), giving access to the spectral information contained in the IP decays. The inversion parameters DC resistivity (ρ), chargeability (m0), the relaxation time (τ) and the frequency factor (C) were compared to reference data from boreholes. The reference data consisted of geological classification and concentration of free-phase chlorinated hydrocarbons, obtained from soil samples. A high resistive anomaly was observed at a location along the profile where soil sampling have confirmed high concentrations of free-phase chlorinated hydrocarbons. High IP-effects, in terms of the spectral parameters m0 and C, was seen next to this area. It is suggested that the IP-effects arise in a zone next to the free-phase source plume. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
20th European Meeting of Environmental and Engineering Geophysics
pages
5 pages
publisher
EAGE
conference name
Near Surface Geoscience 2014
external identifiers
  • Scopus:84908389506
DOI
10.3997/2214-4609.20142049
language
English
LU publication?
yes
id
18f52507-d9d3-4ed3-aa4a-35fbc09173fc (old id 4935872)
date added to LUP
2015-01-20 14:49:05
date last changed
2016-10-13 04:39:32
@misc{18f52507-d9d3-4ed3-aa4a-35fbc09173fc,
  abstract     = {Soils beneath former dry cleaning sites are often contaminated with the chlorinated hydrocarbons PCE and its degradation products, which are highly toxic and cancerogenic. In this study, resistivity and time domain induced polarization (DCIP) were measured at a former dry cleaning site in order to investigate if the source contamination of PCE could be detected. 80 meter long 2D-profiles were measured across the site with the ABEM Terrameter LS instrument. The DC and full IP decay data were inverted using the 2-D DC/IP inversion algorithm developed by Fiandaca et al. (2013), giving access to the spectral information contained in the IP decays. The inversion parameters DC resistivity (ρ), chargeability (m0), the relaxation time (τ) and the frequency factor (C) were compared to reference data from boreholes. The reference data consisted of geological classification and concentration of free-phase chlorinated hydrocarbons, obtained from soil samples. A high resistive anomaly was observed at a location along the profile where soil sampling have confirmed high concentrations of free-phase chlorinated hydrocarbons. High IP-effects, in terms of the spectral parameters m0 and C, was seen next to this area. It is suggested that the IP-effects arise in a zone next to the free-phase source plume.},
  author       = {Johansson, Sara and Fiandaca, Gianluca and Dahlin, Torleif},
  language     = {eng},
  pages        = {02--02},
  publisher    = {ARRAY(0x8fd5fa8)},
  series       = {20th European Meeting of Environmental and Engineering Geophysics},
  title        = {Field Application of Resistivity and Spectral Time Domain IP to Investigate Geoelectrical Signatures of Free-phase PCE},
  url          = {http://dx.doi.org/10.3997/2214-4609.20142049},
  year         = {2014},
}