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-Laboratory AnWyse3 <br /> The samples were transported under chain of custody to Enseco-Cal <br /> Labs in West Sacramento, an environmental laboratory certified by <br /> the California Department of Toxic Substances Control (DISC) <br /> Enseco analyzed the samples for constituents according to the <br /> guidelines provided by San Joaquin County. The samples were tested <br /> for the following: <br /> • Total Petroleum Hydrocarbons (TPH) as gasoline and diesel, <br /> • Benzene, Toluene, Ethylbenzene, and Xylenes (BTE&X), <br /> 0 Ethylene Dibromide (EDB); and <br /> • Total Lead. <br /> The results of the analyses are summarized and presented in Table <br /> 4-1. Copies of the laboratory report and chain of custody are <br /> continued in Appendix J <br /> The tank formerly located at 1541 West Weber appeared to be in good <br /> condition when it was removed. No constituents of concern were <br /> found in the soils surrounding this tank. Thus, this tank excavation <br /> is considered to be closed. No water was found in the tank <br /> excavation. <br /> The tank formerly located at 1325 West Weber showed corrosion and <br /> holes. Analyses of soils and ground water from the tank excavation <br /> indicate the presence of gasoline and diesel compounds. Limited <br /> additional investigation will be required to assess the extent of the <br /> affected soil and ground water. <br /> The presence of lead in soil and ground water at 1325 West Weber, <br /> and in soil at 1541 West Weber is consistent with the lead detected at <br /> 1515 West Weber. Because no organic lead was detected at 1515 West <br /> Weber, it is likely that the lead at 1325 and 1541 West Weber also <br /> represents background concentrations. Subsequent samples from <br /> 1325 West Weber will be analyzed for organic rather than total lead to <br /> assess whether the lead detections could be associated with the <br /> former tank. <br /> 4-5 <br />