Building 4059 SWMU
This page describes the RCRA (chemical) cleanup of the Building 4059 solid waste management unit (SWMU).
Building 4059 was constructed in 1963 to support design and testing of the SNAP 8 Development Reactor. The facility later housed a sodium system, the Large Leak Test Rig. Building 4059 was demolished in 2004.
Following the removal of the activated concrete foundation, the excavation was sampled by ORISE and DHS in October 2004. Once the area was cleared of radiological controls, DTSC and Rocketdyne conducted characterization sampling for RCRA chemical contaminants at the bottom of the excavation. The excavation was backfilled and a MARSSIM final status survey of the backfilled area was performed. ORISE and DHS performed a verification survey in 2006.
A near-surface groundwater report completed in 2002 identified contamination with organic chemicals. Additional sampling will be completed at the site of the former Building 4059 as part of the RCRA Corrective Action program.
See the Building 4059 history page for additional information on past radiological cleanup.
