1. Department of Geology and Environmental Earth Science, Miami University, USA
2. Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, USA
3. Naval Research Laboratory, Stennis Space Center, MS 39529, USA
4. U.S. Environmental Protection Agency, ORD, NRMRL, LRPCD, Cincinnati, OH, 45268, USA
5. U.S. Environmental Protection Agency, NHSRC, WIPD, Cincinnati, OH 45268, USA