Evaluation of groundwater age using helium isotopes in the coastal area of Suruga Bay, adjacent to Mt. Fuji, Japan

Masahiko Ono1, Isao Machida1, Masaru Koshigai2, Reo Ikawa1 and Atsunao Marui1, (1)Geological Survey of Japan, AIST, Tsukuba, Japan, (2)SUNCHO CONSULTANTS Co. Ltd, Tokyo, Japan