1. Dep. of Population Health and Reproduction
2. Western Institute for Food Safety and Security
3. Dep. of Land, Air and Water Resources; Univ. of California; One Shields Avenue Davis CA 95616
4. USGS; Sacramento CA
5. California Dep. of Water Resources; Sacramento CA
6. Faculty of Engineering, Division of Energy and Environmental Systems; Hokkaido Univ.; Kita 13 Nishi 8, Kita-ku Sapporo-shi Hokkaido 060-8628 Japan