1. Environmental Protection and Compliance Division, Environmental Stewardship Group, Los Alamos National Laboratory , Los Alamos, NM 87545 , USA
2. Department of Anthropology, University of New Mexico , Albuquerque, NM 87131 , USA
3. Chemistry Division, Nuclear and Radiochemistry Group, Los Alamos National Laboratory, Los Alamos National Laboratory , Los Alamos, NM 87545 , USA
4. Peabody Museum of Archaeology and Ethnology, Harvard University , Cambridge, MA 02138 , USA
5. Department of Anthropology, University of Texas at Austin , Austin, TX 78712 , USA
6. Epsilon Systems Solution Inc. , Las Cruces, NM 88005 , USA