Surface Geophysical Survey for Fly Ash Water Seepage Detection at Loy Yang Coal Mine

B034 SURFACE GEOPHYSICAL SURVEY FOR FLY ASH WATER SEEPAGE DETECTION AT LOY YANG COAL MINE Summary 1 The fly ash water pond at Loy Yang Power station (Australia) presents high TDS content. It leaks into the shallow aquifer and affects groundwater quality. The existing boreholes monitoring network intercepts points of highly conductive groundwater but does not provide sufficient information on plume flow paths for remediation purposes. This paper reports the results of electrical and electromagnetic surface surveys applied to high resolution 3 D mapping of the seepage path. Galvanic and TEM techniques successfully identified the plume providing valuable information for