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San Joaquin County Public Health Services <br /> Environmental Health Division <br /> November 1, 1994 <br /> Page 2 <br /> Soil samples will be collected from the boring for chemical analysis beginning at a depth. of <br /> 20 feet Soil cuttings will be contained in D O T approved drums pending determination of the <br /> appropriate disposal method One composite soil sample will be collected from the cuttings and <br /> analyzed for TPH/D for waste profiling purposes <br /> 13 Groundwater^Investigation <br /> The groundwater investigation will consist of two subtasks completion of the soil boring as <br /> a monitoring well directly downgradient of the former waste oil tank, and a groundwater monitoring <br /> round including all five monitoring wells at the site <br /> 1 4 Analytical Methods <br />• Soil samples from the soil boring will be analyzed by a State of California Environmental <br /> Protection Agency, Division of Toxic Substance Control (DTSC) licensed laboratory for Total <br /> Petroleum Hydrocarbons as diesel (TPHID) using EPA Method 5030/8015 modified Groundwater <br /> samples will be analyzed with the following methods consistent with previous quarterly groundwater <br /> monitoring rounds <br /> TPHID (EPA Method 8015 modified), and <br /> benzene, toluene, ethylbenzene, and total xylenes (BTEX) (EPA Method 602) <br /> 15 Data Analysis and_Report <br /> Dames & Moore will analyze the data and prepare a report summarizing the investigation <br /> methods, results, and conclusions Copies of the report will be presented to the PHS-EHD and the <br /> RWQCB <br /> v <br /> SAC128 l8 Page-2 DAMES & MooRE <br />