Non-invasive geophysical mapping of chemical waste deposits and flow-paths

A non-invasive geophysical survey has been undertaken to characterise the extent of contamination associated with chemical wastes deposited in dis-used sandstone quarries. The specific aims of the geophysical survey were: - to delineate the concealed edges and base of the quarries prior to the siting of sampling and monitoring boreholes - to assess whether waste fluids had invaded the surrounding sandstones and to map these contaminant migration pathways, prior to intrusive sampling A secondary aim was to assess the general capabilities and reliability of geophysical methods for waste site characterisation in this environment.