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Sampling andResults <br /> Three soil samples were collected in split stainless steel tubes from approximately <br /> 1 foot below the bottom of the tank. The soil samples were collected by A. Rosdahl <br /> of LLNL, and the soil samples were sent to Brown and Caldwell Analytical for <br /> chemical analyses. The soil samples were analyzed for Total Petroleum <br /> Hydrocarbon (TPH)-Gasoline, TPH-Diesel, Total Extractable Petroleum, Benzene, <br /> Toluene, Xylene, Ethyl Benzene, Tetraethyl Lead, Metals, Polychlorinated <br /> Biphenyls (PCB), and Ethylene Dibromide. <br /> The results of the above chemical analyses indicated that the underground tank <br /> was leak tight. See Appendix C for the results of the chemical analyses and the <br /> chain-of-custody record. <br /> Disposition of the Tank System. <br /> Since there was no evidence of leakage, the concrete encasement was removed <br /> from the 55-gallon tank and disposed of as a municipal waste. <br /> The 55-gallon tank is currently stored at the Hazardous Waste Storage Area <br /> located in Lawrence Livermore National Laboratory, Livermore, California, and <br /> is waiting final disposal as a hazardous waste. <br /> 2 <br />