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i <br /> Lawrence Livermore National Laboratory <br /> December 26, 1990 <br /> Mr. Doug Wilson <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P. O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Submittal of the Investigation Report of the 850-D1 U1 Underground <br /> Storage Tank at Lawrence Livermore National Laboratory Site 300 <br /> Dear Mr. Wilson: <br /> Enclosed is our report of the investigation of the 850-DlUl underground <br /> storage tank at Lawrence Livermore National Laboratory (LLNL) Site 300. <br /> This report describes the soil and bedrock sampling for the diesel fuel <br /> present in the soil beneath the 850-DlUl tank excavation. The investigation <br /> was conducted to characterize the extent of the diesel fuel that was released <br /> during the 1985 tank removal operation. Ground water beneath the tank <br /> excavation is not contaminated with diesel fuel. <br /> The characterization of diesel fuel in the soil and bedrock is now complete. <br /> Approximately 19 cubic yards of soil and bedrock contains total diesel <br /> concentrations in excess of 100 ppm. Remediation will be discussed in the <br /> forthcoming Building 850/East Firing Area Feasibility Study. <br /> If you have any questions, please call Albert Lamarre at (415) 422-0757 or <br /> contact him by mail at P. O. Box 808, Mail Stop L-528, Livermore, CA, 94550. <br /> Sincerely, <br /> �Q Fredric Hoffman <br /> Division Leader <br /> Environmental Restoration Division <br /> FH:AL:jz <br /> enclosure <br /> cc w/enc: <br /> M. Brown, DOE/LSO <br /> C. Flippo, EPA <br /> M. Higgins, RWQCB <br /> M. Radmand, EPA <br /> An Equal Opportunity Employer-Universityof California-P.O Box 808 Livermore,California 94550-Telephone(415)422-1100-Twx 910-386-8339 UCLLL LVMR <br />