Brownfield EM Image

An EM contour map of an abandoned brownfield; the site had been a gas station, and ice cream shop. What is interesting about this image is that at some point the underground storage tank (UST) was actually removed and the hole was filled with imported soil from a different location. The EM survey was sensitive enough to pick up the different soil types thus delineating the former site of the UST. The contour map also shows locations of other anomalies common in brownfields, which were identified based on subsequent targeted excavations based on the results.