Post-Closure Inspection, Sampling, and Maintenance Report for the Salmon, Mississippi Site., Calendar Year 2010.

摘要

This report summarizes the annual inspection, sampling, measurement, and maintenance activities performed at the Salmon, Mississippi, Site in calendar year 2010. The draft Long-Term Surveillance and Maintenance Plan for the Salmon Site, Lamar County Mississippi (DOE 2007) specifies the submittal of an annual report of site activities with the results of sample analyses. The Salmon, MS, Site is a federally owned site located in Lamar County, MS, approximately 12 miles west of Purvis, MS, and about 21 miles southwest of Hattiesburg, MS (Figure 1). The U.S. Department of Energy (DOE), a successor agency to the U.S. Atomic Energy Commission (AEC), is responsible for the long-term surveillance and maintenance of the 1,470-acre site. DOEs Office of Legacy Management (LM) is the operating agent for the surface and subsurface real estate. The surface real estate was transferred via quitclaim deed from federal ownership to the State of Mississippi on 15 December 2010. The transfer deed was signed by a representative from LM, the Secretary of State, and the Governor (Appendix A, Image A1). The deed and its attachments were filed with the Lamar County Chancery Clerk. The subsurface real estate (including minerals) below the site boundary remains under federal ownership. The AEC conducted Projects Dribble and Miracle Plan to study seismic signatures from the detonations in the Tatum Salt Dome beneath the site. Figure 2 shows an outline of the salt dome at about 2,500 feet (ft) below the surface. Two underground nuclear tests (Dribble) and two chemical explosive tests (Miracle Plan) were conducted in the Tatum Salt Dome between 1964 and 1970. The site was cleaned up and decommissioned in 1972. During the cleanup, most of the soil and drilling mud contamination from drill-back operations were slurried and injected into the cavity.