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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. GWB Thickness TPHg B T E X MTBE TOC-(Jt.) (ft.) (Abgs) (msl) (ft.) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) U-11 04/19/04 30.71 -18.16 0.00 98 4.1 3.7 7.3 25 <0.504 (Cont.) 08/16/04 32.20 -19.65 0.00 <50 <0.50 <0.50 <0.50 <1.0 <0.504 11/15/04 32.75 -20.20 0.00 <50 0.64 <0.50 <0.50 1.1 <0.504 02/14105 32.82 -20.27 0.00 <50 ,r <0.50 0.71 - <0.50 1.3 L. <0.504 U-12 12.41 05/31/0018 32.59 110-120 -20.18 0.00 -- -- -- -- -- -- 06/07/009 25.92 -13.51 0.00 44010 64 5.1 4.5 7.0 23/3.54 06/07/0015 25.92 -13.51 0.00 39010 58 5.1 3.4 6.9 1613.1° 08/31-09/01/00 27.02 -14.61 0.00 25710 17.3 1.07 1.64 2.56 8.5415.384 11120-22100 27,43 -15.02 0.00 86110 99.9 2.39 3.60 2.27 <12.51<2.004 02126-27/01 27.02 -14.61 0.00 634 69.0 1.36 2.15 1.51 <2.50/<2.04 05114-16101 25.87 -13.46 0.00 53410 38.3 0.761 1.29 0.950 <5.001<2.004 4 08113-15/01 28.11 110-120 -15.70 0.00 71010 69 2.7 1.7 2.3 <5.0/<2 11126-28101 29.05 -16.64 0.00 6810 9.2 <0.50 <0.50 <0.50 <5.012.54 02125-27102 28.29 -15.88 0.00 4 < <5.011.7 < 2.1 <0.50 <0.50 0.50 50 05107-09102 28.40 -15.99 0.00 66010 73 2.0 1.2 1.3 <101<1.04 08/12-14/02 30.44 -18.03 0.00 65029 54 2.3 2.1 1.7 8.9I<1.04 11105-06/02 31.00 -18.59 0.00 710 47 2.3 <2.0 6.2 21/<2.04 02/04-06103 30.11 -17,70 0.00 810 34 <2.5 <2.5 5 27/4.04 05/27-30/03 30.44 -1&03 0.00 830 33 5.3 <2.5 7.4 25/0.554 08126-29103 31.77 -19.36 0.00 850 36 2.8 1.3 5.5 171<0.504 11/26/03 39.22 -26.81 0.00 890 56 18 <0.50 <1.00 <0.504 02116-18104 31.67 -19.26 0.00 680 33 3.5 0.52 5.5 <0.504 04/19104 31.21 -18.80 0.00 700 39 24 9.2 30 <0.504 08/16/04 33.07 -20.66 0.00 710 28 50 11 2.3 5.2 <0.50 4 11/15/04 33.28 -20.87 0.00 620 28 40 9.3 1.5 4.1 <0.504 4 02/14/05 32.35 ; -19.94 0.00 22011 36 3.9 1.3 5.7 =' <0.50 06940-0 1 ENSR leration