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r } <br /> I <br /> Subsurface Investigation December 12, 1990 <br /> Former Unocal Station No 2859, Stockton. California AGS 38012-5 <br /> TABLE 1 <br />' CONCENTRATIONS OF HYDROCARBONS IN SOIL SAMPLES <br /> COLLECTED FROM BORINGS K1/B1 THROUGH K6/B6 <br /> J.H. Kleinfelder and Associates <br />' January 29, 1988 <br /> Former Unocal Service Station No. 2859 <br /> 1665 Pacific Avenue <br /> Stockton, California <br />' January 1988 <br /> Baring Depth Ethyl- Total <br /> Number (Feet) TPH Benzene Toluene benzene Xylenes <br />' KB1 25 1/2 15.8 <0. 05 0.274 <0. 01 <0. 05 <br /> KB1 30 1/2 7.8 <0. 05 0. 082 <0. 01 <0. 05 <br /> KB2 25 1/2 8.7 0. 103 0.112 <0. 01 0.212 <br /> KB2 30 1/2 8 . 6 <0. 05 0. 163 <0. 01 <0. 05 <br /> KB3 15 1/2 8.8 0. 045 0. 178 <0. 01 0. 136 <br /> KB3 20 1/2 239 . 0 11.2 18. 0 18.2 41.9 <br /> KB4 15 1/2 8.5 <0. 05 0.133 <0. 01 <0.05 <br /> KB4 21 1/2 24 .8 0. 129 0.328 0.537 2. 0 <br /> KB5 15 1/2 32 .2 <0. 05 1.71 <0. 01 0. 674 <br />' KB5 20 1/2 370. 0 6.58 38. 6 40. 1 53 . 15 <br /> Results in parts per million (ppm) <br /> TPH = Total petroleum hydrocarbons <br />' < = Below detection limits by method of analysis used <br /> used <br /> K5/B5 <br /> Borings drilled by Kleinfelder <br /> I <br /> 3 <br /> I AjOP1490' GeoSystems -. <br />