This investigation report focuses on the area of Ton-Wei and Da-Tam at Kwan-Yin, Taoyuan Hsien to estimate the volume of refilled unknown wastes in the located area to provide data for next phase reclamation. These volumes are estimated through multiplying the located area by average depth which is found by using geophysical methods. We locate the abnormal resistivity areas by Electro-Magnetic method, and get averaged depths of those areas by Resistivity Image Profiling method, topography survey and groundtruth.