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July 8, 1988 AGS Job No. ?8032-1 i <br /> UNOCAL Service Station No. 6981, Stockton, Cali£orniz. j <br /> f <br /> i <br /> TABLE 2 <br /> CHEMICAL RESULTS OF SOIL SAMPLES 1 . <br /> UNOCAL Service Station No. 6981 <br /> 4707 Pacific Avenue 3 <br /> Stockton, California <br /> Sample Ethyl- Total <br /> Number Date TPH Benzene benzene Toluen- Xylenes <br /> u-19-LINE2 5/19 1,407 2.3 57.7 102.2 391.9 �f <br /> I5-19-LINE2A 5/19 <2 <0.05 <0.05 <0.06 <0.05 <br /> S-11-LINE3 5/19 <2 <0.05 <0.05 <0.05 <0.05 a <br /> S-7-LINE4 5/19 <2 <0.05 <0.05 <0.05 <0.05 <br /> S-S-LINES . 5/20 <2 <0.05 <0.05 <0.05 <0.05 <br /> 5-13-LINE5 5/20 1,726 23 72 167 396- :' <br /> All results in parts per million <br /> TPH = Total petroleum hydrocarbons <br /> < = Less than the detection limit for the analytic21 <br /> methods used <br /> , Sample designation: <br /> 5-10-LINE2 _ - <br /> �-- Product delivery line sample location number 1 <br /> �— Sample depth in feet below ground surface <br /> Soil sample <br /> i <br /> Based on 1) the analytical results of soil sample 5-7.3-LINE9 <br /> collected adjacent to the underground storage tanks a',id 2) the <br /> age of the tanks, approximately 25 years for two of the tanks, <br /> and 5 to "i years for the third tank, UNOCAL Corporation decided <br /> to remove the underground storage tanks and replace them with new t <br /> tanks. <br /> i <br /> A)OPlied GeoSystems <br />