Trenches in the two Animal Hospital buildings were backfilled with imported soil. These trenches were dug to remove piping that carried wastes from animal cages to an on-site treatment system. Soil sampling performed by DOE beneath the piping showed no residual contamination. These results were confirmed by independent sampling by the California Department of Health Services, and then the trenches were backfilled. Air A year-long air monitoring program was initiated in August 1995.
Air is pumped through several different filters, which are sent to a laboratory for analysis.
The program was designed to determine if LEHR is producing any air emissions which could affect on-site personnel, visitors, or neighbors. The results of this study will be presented later this year. Waste Recent LEHR waste management achievements include significant reductions in waste volume prior to disposal and the recycling of radioactive sources that are no longer needed. These achievements were the result of the LEHR Waste Minimization Program, a component of overall program management that continuously seeks ways to minimize the amounts of waste generated during the cleanup project and to reuse material whenever possible. Waste from the demolition of the LEHR Imhoff radioactive waste treatment building was sent to a private contractor to undergo supercompaction prior to disposal as low-level radioactive waste at the Westinghouse Hanford site in Washington.