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TABLE 2 CONCENTRATIONS OF HYDROCARBON CONSTITUENTS IN SOIL AND WATER <br /> SAMPLES NEAR THE SITE OF OF FORMER EXXON RETAIL SITE 7-3942, <br /> STOCKTON CALIFORNIA <br /> Total <br /> _ Well Depth Ethyl- Petroleum <br /> No. Datea (feet) Benzene Toluene Benzene Xylenes Hydrocarbons <br /> Borehole Soil Samples (mg/kg) <br /> MW1 01/87 16 -- -- -- -- <10 <br /> MW2 01/87 16 -- -- -- -- 60 <br /> 30 -- -- -- -- <10 <br /> MW3 01/87 20 -- -- -- -- <10 <br /> MW4 07/87 17.5 <0.05 <0.05 <0.05 <0.05 <10 <br /> MW5 07/87 17.5 <0.05 <0.05 <0.05 <0.05 <10 <br /> MW6 07/87 17.5 <0.05 <0.05 <0.05 <0.05 <10 <br /> MW7 07/87 17.5 <0.05 <0.05 <0.05 <0.05 <10 <br /> 27.0 <0.05 <0.05 <0.05 <0.05 <10 <br /> MW8 02/88 18.5 <0.5 <0.5 -- <0.5 <10 <br /> 28.5 12 150 -- 260 3,200 <br /> ,. MW9 02/88 18.5 <0.5 <0.5 -- <0.5 <10 <br /> 23.5 <0.5 <0.5 -- <0.5 <10 <br /> MW10 04/88 21 .5 <0.5 <0.5 -- <0.5 <10 <br /> Excavation Soil Samples (mg/kg) <br /> Total <br /> Well Depth Ethyl- Petroleum Organic <br /> No. Date (feet) Benzene Toluene Benzene Xylenes Hydrocarbons Lead <br /> ES1* 10/86 2 <0.001 <0.001 <0.001 <0.001 <0.05 <0.05 <br /> ES1* 10/86 2 <0.001 <0.001 <0.001 <0.001 <0.05 <0.05 <br /> ES2 10/86 2 <0.001 <0.001 <0.001 <0.001 <0.05 <0.05 <br /> ES3 10/86 2 <0.001 0.076 <0.001 <0.001 <0.05 <0.05 <br /> ES4 10/86 2 <0.001 <0.001 <0.001 <0.001 <0.05 <0.05 <br /> a. Samples from 10/86 reported in AEM 1986; from 01/87, in HLA 1987; in 07/87, <br /> from EA 1987. <br /> Note: * indicates replicates; ** indicates a sample made up of an unknown <br /> mixture in the range of C8 to C16' <br /> e20/73942 <br />