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TABLE 3 Historical Groundwater Monitoring &Analytical Data Stockton Charter Way Commingled Plume 440, 441, and 508 West Charter Way and 1444 South Lincoln Street, Stockton, CA Depth Measured Calc. TOC Motor 1,2- to SPH GW GRO DRO B T E X MTBE TBA DIPE ETBE TAME Ethanol McOH EDB D.O. Well No. Date Notes Elevation Water Thickness Elev. (pg/L) (pg/L) Oil (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) (Ng/L) (Ng/L) (pg/L) DCA (pg/L) (mg/L) Comments feet IL (feet) (feet) (feet) (feet) (N9/L) (pg/L) AMW-1B 05/09/05 10.26 21.68 0.00 -11.42 <50 7.5 <0.50 1.2 1.1 <0.50 <20 <1.0 <1.0 <1.0 <100 0.58 1.5 08/18/05 22.42 0.00 -12.16 200 12 0.56 <0.50 2.7 <0.50 <20 <0.50 <0.50 <0.50 <100 0.96 1.9 11/17/05 NS - - - - - - - - - - - - - - - - 02/06/06 NS 05/08/06 NS 08/07/06 19.16 0.00 -8.90 1,800 1.3 <0.50 0.65 <0.50 <0.50 <20 <0.50 <0.50 <0.50 <300 <0.50 0.8 10/30/06 9.91 20.55 0.00 -10.64 170 8.7 <0.50 <0.50 1.7 <0.50 <20 <0.50 <0.50 <0.50 <300 0.94 1.3 01/29/07 20.70 0.00 -10.79 160 7.7 <0.50 <0.50 1.9 <0.50 <20 <0.50 <0.50 <0.50 <300 0.68 1.4 05/07/07 20.12 0.00 -10.21 160 13 0.55 <0.50 1.9 <0.50 <20 <0.50 <0.50 <0.50 <300 0.54 1.1 08/06/07 20.73 0.00 -10.82 100 7.5 <0.50 <0.50 1.2 <0.50 <20 <0.50 <0.50 <0.50 <300 0.67 2.6 11/01/07 21.38 0.00 -11.47 110 7.2 <0.50 <0.50 1.2 <0.50 <20 <0.50 <0.50 <0.50 <300 0.57 4.0 02/04/08 19.99 0.00 -10.08 100 5.4 <0.50 1.2 2.2 <0.50 <10 <0.50 <0.50 <0.50 <100 0.64 0.7 05/05/08 19.49 0.00 -9.58 110 9.3 0.75 1.8 7.7 <0.50 <10 <0.50 <0.50 <0.50 <300 <0.50 3.0 08/04/08 20.35 0.00 -10.44 <50 2.8 0.66 0.65 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 <0.50 - 10/23/08 21.28 0.00 -11.37 180 9.6 <0.50 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 <0.50 1.0 01/27/09 21.27 0.00 -11.36 <50 2.6 <0.50 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 0.69 3.2 04/27/09 19.94 0.00 -10.03 93 4.9 <0.50 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 0.54 1.9 07/22/09 20.49 0.00 -10.58 - - - - - - - - - - - - - 07/23/09 - - - 190 15 0.67 <0.50 1.7 <0.50 <10 <0.50 <0.50 <0.50 <300 1.0 9.9 02/18/10 20.28 0.00 -10.37 - - - - - - - - - - - - - 02/19/10 - - - 230 16 0.93 2.4 2.7 <0.50 <10 <0.50 <0.50 <0.50 <300 0.95 0.2 05/24/10 18.80 0.00 -8.89 - - - - - - - - - - - - - 05/25/10 - 0.00 - <50 0.73 <0.50 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 <0.50 <0.50 0.6 Hydrocarbon odor 10/04/10 11.63 29.80 0.00 -18.17 - - - - - - - - - - - 10/14/10 - - - 200 7.1 <0.50 <0.50 <0.50 <0.50 5.9 <0.50 <0.50 <0.50 <5.0 <0.50 AMW-1C 08/30/00 10.21 22.19 0.00 -11.98 54 6.3 <2.0 <2.0 4.1 <2.0 <200 <2.0 <2.0 <2.0 - 4.1 11/21/00 21.69 0.00 -11.48 62.3 N 5.7 1.2 1.00 3.5 <2.0 <200 <2.0 <2.0 <2.0 2.9 - 02/15/01 21.80 0.00 -11.59 <50 9.9 1.4 1.6 2.6 <2.0 <200 <2.0 <2.0 <2.0 3.2 0.8 05/17/01 21.23 0.00 -11.02 <50 9.1 0.71 1.6 1.2 <2.0 <200 <2.0 <2.0 <2.0 2.5 1.1 08/16/01 22.66 0.00 -12.45 <50 4.2 0.65 <0.50 0.83 <2.0 <200 <2.0 <2.0 <2.0 <2.0 2.4 12/06/01 23.57 0.00 -13.36 <50 9.3 <0.50 1.4 0.72 <0.50 <5.0 <0.50 <0.50 <0.50 1.8 1.3 02/14/02 22.17 0.00 -11.96 <50 10 0.59 1.8 1.7 <0.50 <5.0 <0.50 <0.50 <0.50 1.4 1.8 06/13/02 22.41 0.00 -12.20 4.8 <0.50 0.90 0.66 <0.50 <0.50 - - - - - 1.3 08/22/02 23.29 0.00 -13.08 <50 4.0 <0.50 1.1 0.99 <0.50 <5.0 <0.50 <0.50 <0.50 1.4 1.3 11/13/02 24.38 0.00 -14.17 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 1.6 - 02/12/03 INA - - - - - - - - - - - - - - 05/29/03 INA - - - - - - - - - - - - - - - 08/04/03 23.30 0.00 -13.09 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 0.92 J 1.1 11/03/03 24.35 0.00 -14.14 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 1.3 1.6 02/09/04 24.10 0.00 -13.89 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 2.0 2.1 05/10/04 23.48 0.00 -13.27 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 1.7 1.2 08/09/04 24.75 0.00 -14.54 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.50 <0.50 <100 1.3 J 3.0 11/15/04 25.52 0.00 -15.31 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <1.0 <1.0 <1.0 <100 1.3 0.7 Stockton Charter Way Commingled Plume 4Q10 Tables.xlsm Page 6 of 72 Stantec