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Table 1 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.) 07) (ft.bgs) (msq (U91L) (U91L) (u91L) (491L) (ug/L) (491L) r U-1 05/1416/01 25.11 -13.46 0.00 1,38010 19.1 3.61 2.47 84.6 <20.0/<2.004 (cont) 08/13-15101 25.81 -14.16 0.00 70010 14 2.1 1.7 8.3 181<2.021 11/26-28101 26.90 -15.25 0.00 1307 <0.50 0.79 <0.50 0.73 <5.012.14 02/25-27102 26.23 -- -14.58 0.00 57011 3.5 0.51 0.59 15 131<1.04 05/07-09102 26.12 -14.47 0.00 1,00011 23 3.4 5.9 57 <25/<1-04 08112-14102 27.46 -15.81 0.00 320 6.3 0.6 <0.50 <0.50 6.111.24 11105-06102 28.41 -16.76 0.00 190 2.7 0.59 <0.50 0.85 5.91<2.04 50 02104-06/03 28.33 -16.68 0.00 < <0.50 <0.50 <0.50 <0.50 <2.0/<2.04 05127-30103 28.26 -16.61 0.00 170 2.6 <0.50 <0.50 <0.50 6.11<0.504 08126-29/03 29.60 -17.95 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.0/0.504 50 < < 11/29/03 34.23 -22.58 0.00 0.50 <O.50 <0.50 <1.00 <0.504 02116-18104 29.61 -17.96 0.00 <50 0.5 <0.50 <0.50 <1.0 <0.504 04/19/04 28.97 -17.32 0.00 390 3.4 7.8 2.1 6.1 <0.504 08/16/04 30.45 -18.80 0.00 510 28 2.3 7.2 0.52 4.1 <0.504 11/15/04 30.84 -19.19 0.00 220211 2.0 10 0.76 2.1 <0.504 02/14/05 29.90 -18.25 0.00 <50 <0.50 1.7 <0.50 2.0 <1.01 U-2 11.49 08/19/94 47.71 -- -36.22 0.00 870 150 12 33 87 -- 11/17/94 47.59 -36.10 0.00 360 88 <1.0 3.8 4.5 -- 02/17/95 45.11 -33.62 0.00 120 4.9 <0.5 0.59 1.8 -- 05/09/95 42.50 -31.01 0.00 91 8.3 0.66 1.5 3.3 -- 08/09/95 41.32 -29.83 0.00 63 9.8 <0.5 1.3 2.6 11/08/95 41.11 -29.62 0.00 150 17 0.68 0.32 0.79 -- 02/06/96 39.51 -28.02 0.00 51 3.2 <0.5 <0.5 <0.5 -- 05/07/96 36.77 -25.28 0.00 60 1.8 <0.5 <0.5 <0.5 -- 08/06/96 36.56 -25.07 0.00 57 1.5 0.54 <0.5 <0.5 11/05/96 36.19 -24.70 0.00 <50 0.62 <0.5 <0.5 <0.5 - 06940-3e 2 ole ENSR Lotion