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f <br /> I <br /> Subsurface Investigation December 12, 1990 <br /> Former Unocal Station No. 2859, Stockton. California AGS 38012-5 <br /> TABLE 4 <br /> CONCENTRATIONS OF HYDROCARBONS IN SOIL AND WATER SAMPLES <br /> . Former Unocal Service Station No. 2859 <br /> 1665 Pacific Avenue <br /> Stockton, California <br /> (August, 1989) <br /> Sample Depth Ethyl- Total <br /> Number (Feet) TPHg Benzene Toluene benzene Xylenes <br /> S-42-B4 42 <1.0 <0.1 <0.1 <0. 1 <0.1 <br /> S-40-B5 40 <2.0 <0.05 <0.05 <0. 05 <0.05 <br /> S-20-B6 20 <2.0 <0. 05 <0.05 <0.05 <0.05 <br /> S-40-B6 40 <2.0 <0. 05 <0. 05 <0. 05 <0.05 <br /> W-43-MW4 150 <0.50 <0.50 <0.50 1.4 <br /> W-43-MW5 240 <0.50 <0.50 8..1 1.9 <br /> Results of soil in parts per million (ppm) <br /> Results of water in parts per billion (ppb) <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> < = Below detection limit for analysis used. <br /> S-40-B6 ' <br /> ' Soil boring number <br /> Sample depth in feet below surface <br /> Soil sample <br /> W-43-MW5 <br /> Water sample number;collected August 28, 1989. <br /> Sample depth in feet below surface. <br /> . - water <br /> 13 <br /> Applied GeoSysteins <br />