COMPLIANCE INFO_FILE 3 - Laserfiche WebLink

Home Browse Search

Closure Report for Building Encased in Concrete Intmcluction This report will document the post-closure activities for the 875-RlUl Waste- Solvent Underground Storage Tank located at Lawrence Livermore National Laboratory (LLNL), Site 300. The aforementioned tank was previously identified and registered with the California Water Resources Control Board as 875-31R. This closure report will satisfy all the necessary documentation and verification that the tank was closed in accordance with the Title 23 CCR 2672 Permanent Closure Requirements. Tank Description tion The underground tank system consists of a 55-gallon steel drum encased in concrete. The underground tank was used to collect dripping and spillage from the above-concrete drum rack storage area. A list of chemicals stored on the concrete drum rack storage area was submitted to San Joaquin County Public Health Services - Environmental Health Services (SJCPS-EHS) as a supplement to the Application for Permit dated January 20, 1989, for the above-referenced underground tank. The location of underground tank 875-RlUl is depicted in Appendix A. Closure Activities The closure of this underground tank was permitted as Tank Identification #39- 1945-21 by W. R. Snavely of SJCPHS-EHS. The last tank test, performed on February 1988, showed that the underground tank was leak tight. On May 1988, the sludge at the bottom of the tank was removed and disposed of as hazardous waste. The residual 1.5 inches of oily water in the tank was removed and the tank was washed with soap and water on December 11, 1989. The rinsate and residual sludge was disposed of as hazardous waste. See Appendix B for copy of the requisition and manifest. The empty tank and the concrete encasement were extracted from the ground on November 5, 1990. W. R. Snavely witnessed the removal of the tank and the collection of soil samples. No underground piping was associated with the removal of this underground tank since the tank was used to collect the dripping and spillage from the above- concrete drum rack.