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Bank of Stockton Page 8 <br /> Bots (Cuter) -Preliminary Soil and Groundwater Investigation <br /> Proaect No 102 2 <br /> April 8, 1997 <br />' Boring13-14 <br /> In order to help determine the extreme limits of the groundwater plume, this boring was <br />' drilled almost 200 feet north of the tank pit The 35 foot soil sample was found to be wet <br /> No unusual odor or stain was encountered in the soil A groundwater grab sample was <br />' collected The soil consisted entirely of clay and silt <br /> 3.2 Analytical Methods <br />' At least two soil samples from each boring, and all 5 groundwater samples were submitted to <br /> Sherwood Laboratories of Hilmar (State Certified Laboratory#1400) using Chain of Custody <br />' protocol Most samples were tested for the presence of benzene, toluene, ethylbenzene, and <br /> xylene (BTEX) using EPA method 8020 Total Petroleum Hydrocarbons measured as <br /> gasoline were analyzed using EPA method 5030/8015m Total Extractable Petroleum <br />' Hydrocarbons measured as diesel was analyzed using EPA method 3540/8015m One water <br /> sample (136W) was also tested for the presence of MTBE, and one soil sample (136-40) was <br /> also tested for the presence of total lead <br />' 3.3 Analytical Results <br /> The following tables summarizes the laboratory analytical results of the soil and water <br /> samples tested These results are also shown in the appropriate places in the soil boring logs <br /> in Appendix B <br /> t <br /> i <br />' 2937 Veneman Ave ,#13240 Geo-Phase Environmental Inc Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax(209) 569-0293 <br />