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r r r r r r r *.r ar �Ir rr rr rr r r �r rr r rr • � s Table 'I Groundwater Monitoring Data and Analytical Results Former 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*(ft) (ft) (ft bgs) (msl) (A) (u91L) (U91L) (ug/L) (ug/L) (u91L) (ugh) U-24 11/26/03 41.18 -29.12 0.00 100 15 4.7 1.8 17 <0.504 {Cont.} 02116-18104 42.18 -30.12 0.00 60 5.4 2.1 0.88 7.5 <0.504 12.06 04/19/04 35.41 -23.35 0.00 130 7.3 4.5 3.5 32 <0.504 08/16/04 31.68 -19.62 0.00 53 28 2.5 1.4 0.85 6.2 <0.504 11115/04 36.22 -24.16 0.00 52 28 3.8 1.9 1.2 7.0 <0.504 U-25 11.92 11120-22100 24.68 110-120 -12.76 0.00 <50.0 <0.500 5.31 0.958 5.88 <5.001<2.. 04 02126-27101 26.30 -14.38 0.00 <50.0 0.698 <0.500 <0.500 <0.500 <2.50/<2.04 05114-16101 26.22 -14.30 0.00 <50.0 <0.500 0.630 <0.500 <0.500 <5.00/<2.004 08113-15/01 27.70 -15.78 0.00 <50 <0.50 1.6 <0.50 1.4 <5.01<2.04 11126-28/01 28.38 -16.46 0.00 <50 <0.50 <0.50 <0.50 <0.50 <5.01<1.04 02125-27102 27.54 -15.62 0.00 <50 1.1 <0.50 <0.50 <0.50 <5.011.24 05107-09102 27.69 -15.77 0.00 <50 0.66 <0.50 <0.50 <0.50 <5.01<1.04 08112-14/02 30.03 -18.11 0.00 <50 1.1 0.86 <0.50 1.4 <2.51<1.04 11105-06/02 30.36 -18.44 0.00 <50 1.3 0.73 <0.50 0.76 <2.5/<2.04 02104-06103 29.82 -17.90 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.01<2.04 05127-30103 29.83 -17.91 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.0/<0.504 08126-29103 31.18 -19.26 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.0/<0.504 11/29/03 43.42 -31.50 0.00 <50 <0.50 <0.50 <0.50 <1.00 <0.504 02116-18104 30.91 -18.99 0.00 <50 1.2 <0.50 <0.50 <1.0 <0.504 04/19/04 30.50 -18.58 0.00 57 1.9 1.2 0.82 7.8 <0.504 08/16/04 32.59 -20.67 0.00 <50 0.86 <0.50 <0.50 <1.0 <0.504 11/15/04 32.53 -20.61 0.00 <50 0.88 0.70 <0.50 <1.0 <0.504 06940-325 25 of 38 ENSR Corporation