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TABLE 4 <br /> GROUNDWATER ELEVATION AND ANALYTICAL SUMMARY <br /> Parkinson's Hammer I-5 Arco <br /> 3250 West Hammer Lane, Stockton, California <br /> Well Groundwater Ethyl- Total <br /> Well Date Elevation Depth to Water Elevation GRO[41 Benzene Toluene benzene Xylenes MTBE <br /> Number Collected (ft msl) (feet) (ft msl) (gg/L) (gg/L) (gg/L) (gg/L) (gg/L) (gg/L) <br /> MW-5 07/29/02 5.13 13.61 -8.48 <50 <0.3 0.9 <0.3 1.2 18,000 <br /> 10/07/02 [1] 14.40 -9.27 <50 <0.30 0.42 <0.30 <0.60 29,000 <br /> 01/02/03 13.87 -8.74 <50 <0.30 0.38 <0.30 <0.60 41,000 <br /> 04/03/03 13.61 -8.48 <50 <0.50 <0.50 <0.50 <1.0 29,000 <br /> 07/21/03 14.25 -9.12 <50 <0.50 <0.50 <0.50 <1.0 .10,000 <br /> 10/13/03. 15.02 -9.89 <50 <0.50 <0.50 <0.50 <1.0 8,800 <br /> 01/12/04 14.31 -9.18 <50 <0.50 <0.50 <0.50 <1.0 1,300 Cl) <br /> 06/22/04 14.10 -8.97 64[2] <0.50 0.98 <0.50 <L.0 36 <br /> 08/12/04 14.60 -9.47 54[2] 0.81 0.94 <0.50 <1.0 14 <br /> 10/21/04 14.79 .-9.66 <50 <0.50 0.69 0.60 <1.0 380 <br /> 01/17/05 13.70 -8.57 <50 <0.50 <0.50 <0.50 <1.0 580 <br /> 04/18/05 12.34 -7.21 <50 <0.50 <0.50 <0.50 <1.0 540 <br /> 07/18/05 13.02 -7.89 <50 <0.50 <0.50 <0.50 <1.0 12 <br /> 10/17/05 13.88 -8.75 <50 <0.50 <0.50 <0.50 <1.0 2,200 <br /> 01/16/06 12.70 -7.57 <50 <0.50 <0.50 <0.50 <1.0 420 <br /> 07/19/06 11.65 -6.52 <50 <0.50 <0.50 <050 <0.50 2.3 <br /> 11/01/06 13.09 -7.96 1,800 <2.5[31 <2.5[31 <2.5[31 <2.5[3] 2,200 <br /> 02/01/07 13.26 -8.13 1,200 <2.5[31 <15[3] <2.5[31 <2.5[3] 1,800 <br /> 04/10/07 12.81 -7.68 860 <2.0[3] <2.0[31 <2.0[31 <2.0[3] 1,300 <br /> 07/23/07 13.50 -8.37 460 <0.50 <0.50 <0.50 <0:50 550 <br /> 10/22/07 13.55 -8.42 320 <0.50 <0.50 <0.50 <0.50 380 <br /> [5] 01/28/08 6.51 12.88 -6.37 210 <0.50 <0.50 <0.50 <0.50 330 <br /> 04/28/08 - 12.70 -6.19 <50 <0.50 <050 <0.50 <0.50 8.1 <br /> 07/28/08 13.81 -7.30 55 <0.50 <0.50 <0.50 <0.50 100 <br /> C./ <br /> August 2008 Workplan---Table 4,Table 5:xls Page 5 of 6 S TRA TUS <br />