[Society of Exploration Geophysicists, Australian Society of Exploration Geophysicists, Chinese Geophysical Society, Korean Society of Earth and Exploration Geophysicists, and Society of Exploration Geophysicists of Japan Near-Surface Asia Pacific Conference, Waikoloa, Hawaii, 7-10 July 2015 - Waikoloa, Hawaii (07 July to 10 July)] Near-Surface Asia Pacific Conference, Waikoloa, Hawaii, 7-10 July 2015 - The detection of leaks through sheet piles in landfills