SCS Engineers served as the prime subcontractor to Cerrudo Services (an 8a firm) to provide PCB Soil Remediation Design/Build services for a building complex at Lawrence Livermore National Laboratory (LLNL) in San Joaquin County, CA.
The site is a U.S. Department of Energy (DOE)-owned experimental test facility, currently operated as part of LLNL. It is used to conduct research, development, and testing of high explosive materials. The project site was constructed in 1960 to test and develop different munitions. The building complex includes the firing table, bunker, outdoor storage areas and driveways/parking areas. Testing and experiments at the complex have impacted site soils with PCBs, copper and high-melting explosives.
The project followed CERCLA design procedures and included reviews by the DOE, EPA, Department of Toxic Substances Control (DTSC), Fish and Wildlife, and Central Valley RWQCB. We remediated 29,000 cubic yards of chemically-impacted soil to reduce the potential for exposure to ecological receptors. Remediation consisted of excavation and soil-cement solidification on-site within an engineered containment embankment. The landfill containment embankment and drainage measures were designed by SCS Engineers as part of the Design/Build project.
Design documents prepared by SCS included:
SCS’s construction/remediation team conducted the earthwork excavation, in-situ solidification and construction of the containment embankment, and completed the drainage and erosion control measures. It is estimated that the in-situ solidification approach saved the DOE at least $3 million over other disposal/remediation options.