[en] Asea Brown Boveri Incorporated (ABB) has been decommissioning the Combustion Engineering (CE) Windsor Site in Windsor, Connecticut since 2001. A portion of the property has been prepared for release from Nuclear Regulatory Commission (NRC) licensure (NRC License No. 06-00217-06). This request is referred to as the ABB Partial Site Release (PSR (ABB 2007)]. The CE Windsor Site is located at 2000 Day Hill Road, Windsor, in Hartford County, Connecticut and consists of approximately 613 acres. ABB has requested the release of 365 acres of the site from licensure for unrestricted use with the remaining 248 acres being maintained under NRC regulation until completion of decommissioning activities. Site-specific derived concentration guideline levels (DCGLs), provided in the Decommissioning Plan (DP), were derived for the entire property (MACTEC 2003). The 248 acre parcel that is to remain on the NRC license, which ABB is referring to as the 'controlled area', will be contained within the PSR boundary. Access to this portion of the site will be restricted as necessary during future decommissioning activities and operations. Final Status Surveys (FSS) for portions of the controlled and PSR areas have been completed and FSS Plans and Reports (FSSPs and FSSRs) have been submitted to the NRC. FSSRs for areas included in Building Complexes 2, 5, 6A, and 17, were previously submitted to and accepted by the NRC. The FSSRs for the remaining potentially impacted areas, except those previously designated as being part of the Formally Utilized Sites Remedial Action Program (FUSRAP), were included in an ABB submittal to the NRC dated September 13, 2007 (MACTEC 2007). The review of the PSR submittal indicates that portions of these building complex areas are to 'remain within the proposed controlled area under active license in order to provide staging areas, buffer zones, and access to the remaining areas for decommissioning' (ABB 2007). The majority of the 365-acre PSR area consists of non-impacted areas along the site property boundary along with some impacted building complex areas (Building 5, 6A and 17 Complexes) and two open land area (Survey Units (SU) CE-FSS-24-01 (Southeast Parcel) and CE-FSS-26-02 (Woods north of Building 17 Complex)] that were previously part of completed decommissioning activities. The FSSRs for these areas stated that 'there is no residual radioactivity above unrestricted release criteria in the area proposed for release'. ABB also stated that 'no additional radioactive material will be used or stored in the released area. Radioactive material generated during the subsequent decommissioning process will be handled and managed in a manner to prevent cross-contamination of the released area' (ABB 2007). The NRC's Headquarters and Region I Offices requested that the Independent Environmental Assessment and Verification Program (IEAV) of the Oak Ridge Institute for Science and Education (ORISE) perform confirmatory radiological surveys of the areas designated by ABB for Partial Site Release at the ABB, Inc. CE Windsor Site in Windsor, Connecticut. These survey activities included Buildings 5, 6A and 17 Area Complexes and SUs 24-01 and 26-02 where remediation activities had been completed and FSSRs submitted to the NRC (MACTEC 2006a and b, 2007). The objectives of the confirmatory surveys were to confirm that remedial actions had been effective in meeting established release criteria and that documentation accurately and adequately describes the final radiological conditions of the PSR Impacted Areas