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Table 1 <br /> Summary of Soil Sample Analysis <br /> Former Mobil Bulk Plant 04-343 <br /> Tracy, California <br /> Boring Date of Depth TPH-G TPH-D Benzene Toluene Ethyl- Total Pb TOC Sulfides <br /> ID Sampling/ (feet) (ppm) (ppm) (ppm) (ppm) benzene Xylenes (ppm) (ppm) (ppm) <br /> Monitoring (ppm) (ppm) <br /> AB-1 5/22/95 5.0 ND 140 ND ND ND ND — — — <br /> 10.0 60 1,800 ND ND 0.13 0.70 — — — <br /> 15.0 ND ND ND ND ND ND — — — <br /> 20.0 ND ND ND ND ND ND — — — <br /> AB-2 6/1/95 5.0 91 2,500 ND ND ND 0.71 — — — <br /> 10.0 2.6 22 ND ND ND 0.022 — — — <br /> 15.0 1.8 12 ND ND ND 0.017 — — — <br /> 20.0 3.5 3.8 1.1 5.3 5.2 25 — — — <br /> AB-3 6/1/95 10.0 ND ND ND ND ND ND — — — <br /> 15.0 ND ND ND ND ND ND — — — <br /> 20.0 ND ND ND ND ND ND — — — <br /> AB-4 6/1/95 10.0 ND ND ND ND ND ND — — — <br /> 15.0 ND ND ND ND ND ND — — — <br /> SP-(1-4) 6/1/95 — ND ND ND ND ND ND 0.090 — — <br /> NOTES: ppm= parts per million ND= not detected at or above method detection limits <br /> TPH-G= total petroleum hydrocarbons as gasoline —= not measured/not analyzed <br /> TPH-D= total petroleum hydrocarbons as diesel TOC= total organic compound <br /> Pb= lead = analyzed by state-certified on-site mobile laboratory <br /> #= 9-point composite sample,collected 4/5,6/90 = analyzed for organic lead <br /> ##= 3-point composite sample,collected 4/11/90 <br /> 30-0136/historical soil,2/12/97 Page 8 of 8 <br />