关键词：放射性同位素；镭-226
摘 要：At the request of the USAF Radioisotope Committee Secretariat (RICS), the USAF School of Aerospace Medicine Consultative Services Division completed an independent radiological assessment/verification survey of sites 321 B North and PRL-S006 at former McClellan AFB, CA, from 12-13 Sep 12. This verification survey was conducted at each of the sites post-remediation and after the contractor had completed its Final Status Survey (FSS) sampling. Radium-226 was the sole radionuclide of concern. Environmental Dimensions, Inc., under contract with CH2M Hill, conducted all radiological field work to include FSSs. This letter details the findings of this visit and is meant to assist the RICS when evaluating the contractor’s FSS reports of these sites.