Acknowledgments Weappreciate very much the excellent support of Marshall Stuart, Henry Jones, John Rehder in the field phase of the project. The continued superb effort by Marshall Stuart, Johr| Rehder, Mike Granillo, Steve Hall, and Henry Jones in processing the thousands of samples coll in this project has been outstanding. Kai Wong, Jim Brunk and Terry Jokela have done an excelleng job analyzing thousands of samples in our analyticalfacilities, and Mark Mount has played a key rold in the quality control phases of our analytical efforts and the dose assessment. Carol Stoker, Steye Kehl, Leina Boone, and James Johnson were a tremendous help in the organization, retrieval, uction, and evaluation of the data resulting from the analysis of thousands of samples collectei at the atoil. Everyone has been essential to the completion of this project and we thank them. 52