This investigation required that considerable time be spent at a field site, the United Nuclear Corporation (UNC) Church Rock, New Mexico, uranium mill. Cooperative interaction between personnel from Pacific Northwest Laboratory (PNL), the Nuclear Regulatory Commission, the New Mexico Environmental Improvement Division (NMEID), and the United Nuclear Corporation was required. This necessary cooperation was generously furnished in all cases and the provision of easy site access and communication facilitated the research. Several personnel were especially helpful and cooperative. The Project Manager for the Nuclear Regulatory Commission, Gregory Eadie, has been extremely helpful and supportive and has functioned as an intermeoiary between all of the organizations involved throughout the course of this study. The two persons from the New Mexico Environmental Improvement Division who have been the most involved in our research are Drs. Thomas Buhl and Jere Millard. A large portion of the work was carried out at the Uniteo Nuclear Corporation Church Rock Mill site and used UNC property and personnel. Harmonious interactions between UNC and PNL personnel allowed our research to progress smoothly. The UNC personnel to whom we are the most grateful are Todd Miller, Gus Swanquist, Robert Miller, and Kee Benally. We thank the personnel from each of these organizations for their very helpful assistance in this research.
