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r.1' <br /> Results of Initial Investigation and Work flan December 18, 1990 <br /> ARCO Service Station No.548, Stockton. California AGS 30004-2 <br /> TABLE 2 <br /> CONC,:NTRATIGNS OF HYDROCARBONS IN SOIL SAMPLES <br /> ARCO Service Station No. 548 <br /> 1512 Hammer Lame <br /> Stockton, California <br /> (October 1 and 2, 1990) <br /> (Page 2 of 2) <br /> ® Sample Ethyl- Total <br /> Number TPHg Benzene Toluene benzene Xylenes Diesel <br /> S-1002-1A$CD 2.4 <0.005 <0.005 <0.005 0.030 <10 <br /> Results in parts per million (ppm) <br /> ® TPHg:= Total petroleum hydrocarbons as gasoline <br /> < Less than the detection limit for the analytical <br /> methods used <br /> NA = Not analyzed <br /> Sample designation:. <br /> S-10-B1 S-^1002-1A-D = Composite sample <br /> ® �� Boring number <br /> Depth of sample <br /> _ Soil <br /> ® Results of analyses of the composite sample indicate total xylene isomers were detected at <br /> 0.030 ppm and TPI-Ig at 2.4 ppm; the concentrations of other:constituents were below . <br /> detection levels. <br /> - " Conclusions `, <br /> Based on the`results of our field investigation and laboratory analyses, we conclude that <br /> gasoline hydrocarbons appear to be present in the soil near the existing tank cavity and <br /> lateral over-excava.ion the tank existing tank cavity is probably necessary. Ground water <br /> Ti <br /> -- - - - -Will probably not be encountered during the excavation of either tank cavity. <br /> +< 9 <br /> .4Ppl ed 4Ge®Syeteins <br />