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TABLE 4 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> Former Texaco Service Station <br /> Chevron Site ID 309075 <br /> 3978 South Highway 99 <br /> Stockton,California <br /> Top of <br /> Casing Depth to Groundwater Total <br /> Elevation Water Elevation TPH-MO TPH-DRO TPH-GRO Benzene Toluene Ethylbenzene Xylenes MTBE <br /> Location ID Date Note feet MSL feet s feet MSL IL LL kL11j. .L%1.LL. L /L 12-DCA EDB / <br /> MW-6 11.17.2009 1 29.70 57.10 -27.40 <400 62 <50 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <br /> MW-6 IL11.17.2009 1 2 29.70 1 57.10 -27.40 86 1 <50 1 — — I — I — I — I — I — — <br /> MW-6D 11.17.2009 1 1 29.98 1 55.18 -25.20 360 170 <50 <0.5 2 0.7 2 <0.5 <0.5 <0.5 <br /> MW-6D 11.17.2009 2 29.98 55.18 -25.20 230 80 — — — — -- — — — <br /> MCLsfor Groundwater — — — 1.0 1 160 1 300 1 1,760 1 13 0.6 0.06 <br /> Notes: <br /> TPH-MO Total petroleum hydrocarbons as motor oil. <br /> TPH-DRO Total petroleum hydrocarbons as diesel. <br /> TPH-GRO Total petroleum hydrocarbons as gasoline. <br /> MTBE Methyl tertiary butyl ether. <br /> 1,2-DCA 1,2-Dichloroethane. <br /> EDB Ethylene dibromide,also known as 1,2-dibromoethane. <br /> MSL Mean sea level. <br /> bgs Below ground surface. <br /> pg/L Microgram per liter. <br /> Not applicable or not available. <br /> MCL Maximum Contaminant Levels for Drinking Water Standards: Department of California Health Services <br /> 1 Tertiary butyl alcohol(TBA),tertiary amyl methyl ether(TAME),di-isopropyl ether(DIPE),ethyl tertiary butyl ether(ETBE),methanol and ethanol concentrations were not detected in <br /> the groundwater sample. For analyte specific detection limits,please refer to the laboratory analytical report. <br /> 2 Analysis performed with silica gel cleanup. <br /> \\CASFP\Data\Aproject\ENV\CHEVRON\309075\6 Deliverables\Reports\DG Wells Assessment\Table 4-Groundwater Analytical Resufts.xlsx 1 of 1 <br />