Land-Based Frequency Domain Electromagnetic Surveys at the Callahan Mine Superfund Site in Brooksville, Maine: October 2016 to May 2017
In October 2016 and May 2017 frequency domain electromagnetic (FDEM) methods were used to image the electrical conductivity of the shallow subsurface.  Electrical conductivity can be caused by changes in the soil, overburden, saturation, and water quality.  Two multi-frequency tools were used at the site. One of the …