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August 11, 1992 <br /> �i ARCO Service Station 2168, Stockton, California Working To Restore Nature <br />! <br /> TABLE 1 <br /> CONCENTRATIONS OF HYDROCARBONS IN SOIL SAMPLES <br /> ARCO Station No. 2168 <br /> 441 Charter Way <br /> Stockton, California <br /> (April and May 1992) <br /> i <br /> Sample Ethyl- Total <br /> Number TPHg Benzene Toluene benzene Xylenes <br /> r <br /> S-20-B5 <1. 0 0.021 <0.0050 <0.0050 <0. 0050 <br /> S-25-B5 <1.0 0.24 <0. 0050 <0.0050 0. 011 <br /> S-40-B5 <1. 0 0. 18 0. 10 0. 0086 0. 028 <br /> S-30-B6 <1. 0 <0. 0050 <0.0050 <0. 0050 <0. 0050 <br /> S-40-B6 1.0 0. 12 0. 013 <0. 0050 0. 012 <br /> S-25-B7 <1. 0 0. 048 <0. 0050 <0. 0050 0. 010 <br /> S-40. 5-B7 43 0. 11 0. 46 0. 16 1. 3 <br /> S-1-PL1 45 0. 053 0. 14 0.39 2 . 5 <br /> S-5-PL2 4 , 100 3 .2 22 7.7 32 <br /> S-26.5-B8 26 0. 14 0.032 0.21 0. 68 <br />�ll S-36.5-B8 <1.0 0.060 0. 022 0. 005 0. 014 <br /> r S-21.5-B9 <1. 0 0. 079 0.0072 0.0051 0. 0091 <br /> 5-31.5-B I5Q_ 0. 65 3 . 6 2 .3 12 <br /> S-40-B9 3 . 0 0.54 0. 20 0.048 0. 20 <br /> -31 - 1 160 0. 19 0.48 1.3 6. 6 <br /> S-26. 5-B10 8. 6 0. 095 0.078 0. 048 0. 16 <br /> S-39 . 5-B10 2.8 0. 42 0. 067 0. 074 0.25 <br /> S-21. 5-B11 <1.0 0. 012 0. 0053 <0.0050 0. 0074 <br /> /NO3/ -6. 5-BlI 44 <0. 050 0. 42 0.41 2 . 6 <br /> S-39 . 5-B11 1. 1 0. 12 0. 0091 0. 020 0. 059 <br /> S-21.5-B12 1.0 0.28 0. 15 0.0095 0. 052 <br /> S-26.5--B12 4 . 0 0. 42 0. 30 0.050 0. 27 <br /> S-40-B12 <1.0 0.062 0. 0084 <0. 0050 <0. 0050 <br /> S-0507-1ABCD <1. 0 <0. 0050 <0. 0050 <0.0050 <0. 0050 <br /> S-0507-2ABCD 86 <0. 050 <0. 050 <0. 050 0. 74 <br /> Results in parts per million <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> < = Less than the detection limit for the analytical methods used <br /> Sample designation: <br /> S-20-B5: Soil - Sample depth in feet - Boring number <br /> 0526ccar <br /> 31009-4 _ <br />