A possibility exists of contaminants spreading along rock fractures at the site. Documented evidence for these rock fractures is over 30 years old. The client wants to know if these rock fractures are present and is it likely that the contaminants will travel along these fractures. The surface materials in the area of testing are a combination of fill materials and natural rocky soils.
Bedrock is located within a few meters of the surface.
Conductive utilities are also located both above and below the ground surface. Three resistivity lines were conducted at the site. Difficulties were encountered with driving the stakes into the rocky surface materials, but contact resistivities indicated that good contact was made with the soil for all but one electrode. The data from the second and third tests indicated extremely low resistivities - values below those expected for any soil or rock type. It was later learned that unrelated actvities were occurring at the site simultaneously.