RESULTS OF HAZARDOUS AND MIXED WASTE EXCAVATION FROM THE CHEMICAL WASTE LANDFILL

摘要

This paper describes the results of the excavation of a 1.9-acre hazardous and mixed wasternlandfill operated for 23 years at Sandia National Laboratories, Albuquerque, New Mexico.rnExcavation of the landfill was completed in 2 ? years without a single serious accident or injury.rnApproximately 50,000 cubic yards of soil contaminated with volatile and semi-volatile organics,rnmetals, polychlorinated biphenyl compounds, and radioactive constituents was removed. Inrnaddition, over 400 cubic yards of buried debris was removed, including bulk debris, unknownrnchemicals, compressed gas cylinders, thermal and chemical batteries, explosive and ordnancerndebris, pyrophoric materials and biohazardous waste. Removal of these wastes includedrnnegotiation of multiple regulations and guidances encompassed in the Resource Conservationrnand Recovery Act (RCRA), the Toxic Substances Control Act (TSCA), and risk assessmentrnmethodology. RCRA concepts that were addressed include the area of contamination, permitrnmodification, emergency treatment provision, and listed waste designation. These regulatoryrndecisions enabled the project to overcome logistical and programmatic needs such as increasedrnoperational area, the ability to implement process improvements while maintaining a record ofrndecisions and approvals.