On January 15, 1999, Tetra Tech EM Inc. (Tetra Tech) received Work Assignment No. R09805 from U.S. Environmental Protection Agency (EPA) Region 9, under Contract No. 68-W-99-008, Resource Conservation and Recovery Act Enforcement, Permitting, and Assistance, Zone III. Under this work assignment, Tetra Tech provides oversight, sampling, and technical review of documents pertaining to the U.S. Department of Energy's (DOE) Energy Technology and Engineering Center (ETEC), which is presently operated by the Rocketdyne Division of Boeing Corporation (Rocketdyne) (formerly Rockwell Corporation) and is located at the Santa Susana Field Laboratory (SSFL). The work assignment includes review of decontamination and decommissioning reports, development of survey and sampling work plans, oversight of radiation surveys, and collection of split groundwater samples for analysis. As of April 1, 2002, this work assignment expired and incomplete tasks have been continued under Work Assignment No. R09107, under Contract No. 68-W-02-021.
This document presents the results of oversight verification (OV) radiological survey tasks conducted by Tetra Tech at the DOE ETEC, located in Area IV of the SSFL, from January 10 through 12, 2000. The general objectives of the OV surveys under this task were to perform: (1) independent measurements of areas not previously surveyed, (2) measurements of areas previously surveyed to establish comparability of survey methods and results, and (3) biased sampling of surfaces and areas that may retain radioactivity. As such, the OV survey covers approximately 20 percent of the building surfaces.