GeoModel, Inc. conducted an Electromagnetic Conductivity (EM) survey at a landfill site in Colorado. The client needed to locate the boundaries of the landfill cells. The EM survey successfully delineated numerous landfill cells, which are high in conductivity (increasing in value from yellow, orange, red, to pink colors).
Background (neutral) readings are represented by green and light blue colors. Dark blue colors can represent very low background readings or low conductivity spikes caused by buried metal debris.
The EM method was fairly rapid as the survey took just a few days to map several acres of landfill. Exploratory drilling was conducted in the landfill area by the client.