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Table 1-3 <br /> SUMMARY OF GROUND WATER MONITORING AND SAMPLING RESULTS <br /> Former Mobil Bulk Plant 0443 <br /> Tracy, California <br /> Casing Depth to Ground Water Ethyl- notal <br /> Well Month/ Elevation Water Elevation TPH-G TPH-D Benzene Toluene benzene Xylenes <br /> Number Year feet feet (feet) ab .........(ppb <br /> b <br /> AW-1 10/02/90 32.97 11.65 21.32 ND<50 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 02/06/91 11.48 21.49 ND<50 ND<200 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> 05/07/91 31.54 11.37 20.17 ND<50 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 08/21/91 11.28 20.26 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 11/26/91 11.90 19.64 ND<30 480 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 02/21/92 11.64 19.90 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 04/07/92 32.96 11.85 21.11 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 04/24/92 11.84 21.12 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 07/20/92 11.86 21.10 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> 10/21/92 11.94 21.02 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> 01/22/93 11.29 21.67 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> 04/02/93 11.61 21.35 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br />�h 05/27/93 11.62 21.34 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> AW-2 10/02/90 33.16 11.37 21.79 ND<50 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 02/06/91 11.30 21.86 ND<50 ND<200 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> 05/07191 32.68 10.94 21.74 ND<50 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 08/21/91 10.96 21.72 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 11/26/91 11.53 21.15 ND<30 99 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 02/21/92 11.10 21.58 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 04/07/92 33.18 11.41 21.77 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 04/24/92 11.40 21.78 ND<30 ND<50 ND<0.30 ND<0.30 ND<0.30 ND<0.30 <br /> 07/20/92 11.50 21.68 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> 10/21/92 11.61 21.57 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 I <br /> f 01/22193 10.66 22.52 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> 04/02/93 11.06 22.12 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> 050'_7193 11.15 22.03 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> Page 1 of 5 <br /> i <br />