Using High-Density Magnetic And Electromagnetic Data For Waste Site Characterization A Case Study

Magnetometers are frequently used to characterize hazardous waste sites. Due to cost and time<br>considerations, data are typically collected on a coarse grid with nodes on 3 to 6 meter (ml<br>centers. Hardware and software are now available which allow the rapid and cost effective<br>collection of information on a much finer sampling grid. In this paper we present and compare total<br>field magnetometery data collected on 3 m centers to total field magnetometery data collected on a<br>grid with centers of 0.5 m or less. We also compare the magnetometery data to time-domain<br>electromagnetic (EM) data collected on a 1 m by 0.2 m grid using the recently introduced Geonics<br>Ltd. EM61 metal detector. All three data sets were collected at an abandoned landfill.