Electrical Impedance Tomography For Detection Of Dnapl Contamina

Mapping the distribution of dense non-aqueous phase liquid (DNAPL) contaminants in<br>subsurface soils and ground water at a site is an important task before remedial action can<br>be intelligently planned. Recently laboratory studies (e.g., McKinley, 2003) has shown<br>that the low frequency electrical properties of a soil from the Savannah River Site (SRS)<br>containing certain clay and contaminated by perchloroethane (PEC) may be sufficiently<br>unique to make it possible to use electrical impedance tomography (EIT) to differentiate<br>normal electrical heterogeneities of the subsurface from parts of the subsurface<br>containing DNAPL contamination.