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TABLE 2 <br /> Historical Groundwater Monitoring &Analytical Data <br /> ARCO Service Station No.2186 <br /> 3212 North California Street, Stockton, CA <br /> Depth Measured Calc. <br /> TflC 1 <br /> to SPH GW GRO B T E X MTBE TBA DIPE ETRE TAME Ethanol '2 EDB D.O. <br /> Welt No. Date Notes Elevation DCA Comments <br /> (ft-MSL) Water Thickness Elev. (pg1L) (w91L) (u91L) (p91L) jI:WL) (u9[L} (u91L} (u91L) (ug/) WIL) (p91L} (N9141 (wWL) (m91L) <br /> {feet) (feet) (ft-MSLJ <br /> VW-3B 03/16/06 13.98 41.35 0.00 -27.37 <50 <0.50 <0.50 <0,50 <0.50 10 <20 <0.50 <0.50 <0,50 <300 1,5 <0,50 3,9 <br /> 06/20/06 39.03 0.00 -25.05 <50 <0.50 <0.50 <0.50 <0.50 5.2 <20 <0.50 <0.50 <0.50 <300 <0.50 <0.50 0.8 <br /> 09/13/06 43.44 0.00 -29.46 <50 <0.50 <0.50 <0.50 <0.50 15 <20 <0.50 <0.50 <0.50 <300 2.2 <0.50 4.5 <br /> 12/13/06 49.20 0.00 -35.22 <50 <0.50 <0.50 <0.50 <0.50 14 <20 <0,50 <0.5G <0,50 <300 2,0 <0.50 1,6 <br /> 03/07/07 38.20 0.00 -24.22 <50 <0.50 <0.50 <0.50 <0.50 15 <20 <0.50 <0.50 <0.50 <300 2.2 <0.50 2.5 <br /> 06/26/07 39.70 0.00 -25.72 <50 <0.50 <0.50 <0.50 <0.50 2.4 <20 <0.50 <0.50 <0.50 <300 <0.50 <0.50 0.8 <br /> 09/19/07 45.24 0.00 -31.26 <50 <0.50 <0.50 <0.50 <0.50 14 <20 <0.50 <0.50 <0.50 <300 1.3 - 5.8 <br /> 12113!!07 42.77 0.00 -28.79 <50 <0.50 <0.50 <0.50 <0.50 7.5 <20 - - - - 0.64 1.38 <br /> 03/03/08 40.09 0.00 -26,11 <50 <0.50 <0.50 <0.50 <0.50 4.9 <10 <300 <0.50 0.79 <br /> 06109!08 INA - - - - - - - - - - - INA due to health and safety <br /> 09/23/08 46.28 0.00 -32.30 <50 <0.50 <0.50 <0.50 <0.50 7.2 <10 <300 0.63 1.50 <br /> 12!15108 45.26 0.00 -31,28 <50 <0.50 <0.50 <0.50 <0.50 4.5 <10 <300 0.57 2.33 <br /> 03/25/09 45.48 0.00 -31.50 <50 <050 <0.50 <0.50 <0.50 2.4 <10 <300 <0.50 1.02 <br /> 06/10/09 47.27 0.00 -33.29 <50 <0.50 <0.50 <0.50 <0.50 4.7 <10 <300 <0.50 0.66 <br /> 11/23109 MD 47.11 0.00 -33.13 - - - - - - - - - - <br /> 11124l09 - - - <50 <0.50 <0.50 <0.50 <0.50 2.5 <10 <0.50 <0.50 <0.50 <300 <0,50 <0.50 0.49 <br /> 06/21110 MD 41.81 0,00 -27.83 - - - - - - - - - - - <br /> 06/22110 - - - <50 <0.50 <0.50 <0.50 <0.50 <0.50 <10 <0,50 0,48 <br /> 12101110 MD 41.94 0.00 -27.96 - - - - - - - <br /> 12/02110 - - - <50 <0.50 <0.50 <0.50 <0.50 ;1. <10 <0,50 0.43 <br /> 06/09111 38.56 0.00 -24,67 <60 <0.60 <0.60 <0.50 <0.50 <0.50 00 <0.60 0.21 <br /> VW-4 06/17104 DRY 14.71 - - - - - - - <br /> 09/23104 DRY <br /> 12/21104 NS <br /> 03/30105 DRY <br /> 06/13105 37.70 0.00 -22.99 670 <0.50 20 11 190 69 <20 <0.50 <0.50 0.98 <100 <0.50 10 2.9 <br /> 09/08/05 NS - - - - - - - - - - - - - <br /> 12/06105 DRY - - - - - - - - - - - - <br /> 03/16106 38.86 0.00 -24.15 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 <300 <0.50 <0.50 <br /> 06/20106 36.45 0.00 -21.74 <50 <0.50 <0.50 <0.50 <0.50 4.6 66 <0.50 <0.50 <0.50 <300 <0.50 <0.50 2.7 <br /> 09113106 VOL 39.64 0.00 -24.93 - - - - - - - - - - - - - - <br /> 12/13106 39.99 0.00 -25,28 - - - - <br /> 03/07107 36.00 0.00 -21.29 <50 <0.50 <0.50 <0.50 <0.5G <G.50 <20 <0.5G <050 <0.50 <300 <0.50 <0.50 5.2 <br /> 06/26107 37.52 0.00 -22.81 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 <300 <0.50 <0.50 3.1 <br /> 09/19107 DRY - - - - - - - - - - - - - - - <br /> 12/13107 DRY - - - - - - - - - - - <br /> 03/03108 39.08 0.00 -24.37 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <10 <300 <0.50 5.59 <br /> 06/09/08 INA - - - - - - - - - - - - INA due to health and safety <br /> 09/23/08 DRY <br /> 12/15/08 DRY <br /> 2186 2Q11 Tables.xism Page 17 of 19 Stantec <br />