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r r r r r r r r r r ar r r r r r r rr rr • i • Table 1 Groundwater Monitoring Data and Analytical Results Farmer Unocal Service Station No. 0187 437 East Miner Avenue Stockton, California Product WELL IDI DATE DTW S.I. GWE Thickness TPHg B T E X MTBE TOC-(ff) (ft) (ftbgs) (msl) (jt) (ug/L) (ug/L) Ng-A-) (ug/L) (ug/L) (ug/L) U-21 04/19/04 31.36 -19.39 0.00 650 450 9.1 2.1 7.9 <104 (Cont.) 08/16/04 33.31 -21.34 0.00 1,000 90 <10 <10 <20 <0.504 11.97 11/15/04 33.55 -21.58 0.00 330 YS 100 5.4 3.4 5.6 <0.504 U-22 12.31 11120-22100 27.34 65-75 -15.03 0.00 <50.0 <0.500 <0.500 <0.500 <0.500 <5.0013.064 02126-27101 27.02 -14.71 0.00 <50.0 <0.500 <0.500 <0.500 <0.500 <2.501<2.04 05I14-16101 26.80 -14.49 0.00 <50.0 <0.500 <0.500 <0.500 <0.500 <5.001<2.004 08113-15101 27.79 -15.48 0.00 <50 <0.50 <0.50 <0.50 <0.50 <5.01<2.04 11126-28101 28.93 -16.62 0.00 <50 <0.50 <0.50 <0.50 <0.50 <5.01<1.04 02125-27102 28.17 -15.86 0.00 <50 <0.50 <0.50 <0.50 <0.50 <5.01<1.04 05107-09102 28.25 -15.94 0.00 <50 <0.50 <0.50 <0.50 <0.50 <5.01<1.04 08112-14102 29.92 -17.61 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.51<1.04 11105-06102 31.03 -18.72 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.51<2.04 02104-06/03 30.55 -18.24 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.01<2.04 05127-30103 30.36 -18.05 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.01<0.504 08126-29103 31.70 -19.39 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.01<0.504 11/29103 32.98 -20.67 0.00 <50 .56 <0.50 <0.50 <1.00 <0.504 02116-18104 31.72 -19.41 0.00 <50 <0.50 <0.50 <0.50 <1.0 <0.504 04/19/04 31.18 -18.87 0.00 60 1.8 1.6 0.95 9.3 <0.504 08/16/04 32.91 -20.60 0.00 <50 0.84 0.62 <0.50 <1.0 <0.504 11/15/04 33.24 -20.93 0.00 <50 0.64 <0.50 <0.50 <1.0 <0.504 U-23 12.38 11120-22100 27.73 110-120 -15.35 0.00 <50.0 0.557 5.69 1.03 6.22 <5.001<2.004 02126-27101 27.35 -14.97 0.00 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50/<2.04 05114-16101 27.22 -14.84 0.00 <50.0 <0.500 <0.500 <0.500 <0.500 <5.001<2.004 06940-325 23 of 38 ENSR Corporation