Figure 7
From: Imaging LNAPL distribution at a former chemical plant with time-domain induced polarization
BTEX as a function of (a) conductivity, (b) phase, (c) normalized chargeability. Although the conductivity is linearly related to BTEX, the plume and source zones within the contaminated area cannot be directly distinguished. For contaminated area, the maximum difference in phase between plume and source zones is 20 mard (~ 65%), while the maximum difference in normalized chargeability between two zones is more evident (~ 93%, ~ 150 mS/m).
