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TABLE 1 GROUNDWATER ELEVATION AND ANALYTICAL SUMMARY ARCO Service Station No. 5469 I 130 South Wilson Way, Stockton,California Elevation Top of Well Static Water Groundwater Groundwater Ethyl- Total { Well Top of Casing Screen Level Elevation Flow TPHG Benzene Toluene benzene Xylene MTBE[1] Number Date feet msl feet b s (feet b s) (feet ms]) Direction ml µ L µ L µ L PA µ L MW-1 NP 06/21/00 16.28 33 36.79 -20.51 SE <50 <2.0 <2.0 <2.0 4.0 <2.0[2] NP 09/08/00 16.28 38.40 -22.12 SE <50 <0.5 <0.5 <0.5 <0.5 <2.5 NP 12/11/00 16.28 38.74 -22.46 SE&N <50 <0.5 <0.5 <0.5 <0.5 3.09121 P 03/22/01 16.28 37.47 -21.19 E-SE <50 <0.5 <0.5 <0.5 <0.5 2.2[2] P 05/24/01 16.28 37.18 -20.90 NC <50 <0.5 <0.5 <0.5 <0.5 <2[2] 06/25/01 16.28 37.70 -21.42 E-NE NS NS NS NS NS NS P 09/14/01 16.28 39.21 -22.93 NE <50 <0.5 <0.5 <0.5 <0.5 <2.0[2] P 12/14/01 16.28 40.33 -24.05 NE <50 <0.50 <0.50 <0.50 <0.50 1.6[2] P 02/21/02 16.28 40.31 -24.03 E-NE <50 <0.50 <0.50 <0.50 <0.50 2.812] P 04/23/02 16.28 40.18 -23.90 NE <50 <0.50 <0.50 <0.50 <0.50 4.1[21 P 09/19/02 16.28 42.18 -25.90 NE <50 <0.50 <0.50 <0.50 <0.50 7.2[2] MW-2 NP 06/21/00 15.88 33 36.53 -20.65 SE <50 <2.0 <2.0 <2.0 <2.0 <2.0[2] NP 09/08/00 15.88 38.23 -22.35 SE <50 <0.5 <0.5 <0.5 <0.5 <2.5 NP 12/11/00 15.88 38.49 -22.61 SE&N <50 <0.5 <0.5 <0.5 <0.5 <2.5 P 03/22/01 15.88 37.30 -21.42 E-SE <50 0.630 <0.5 <0.5 <0.5 <2.0[2] P 05/24/01 15.88 36.99 -21.11 NC <50 0.536 <0.5 <0.5 <0.5 4[2] 06/25/01 15.88 37.55 -21.67 E-NE NS NS NS NS NS NS NP 09/14/01 15.88 38.90 -23.02 NE <50 0.57 <0.5 <0.5 <0.5 4.0[2] P 12/14/01 15.88 3990 -24.02 NE <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] P 02/21/02 15.88 39.80 -23.92 E-NE <50 1.2 <0.50 <0.50 <0.50 <0.50[2] P 04/23/02 15.88 39.69 -23.81 NE <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] P 09/19/02 15.88 41.81 -25.93 NE <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] I 3TRATUS Arco_5469_Quarter1 y_Data 1 of 5