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TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> ARCO Service Station No 2130 <br /> 7906 North El Dorado Street, Stockton, California <br /> Elevation Static Water Groundwater Ethyl- Total <br /> Well Top of Casing Top of Screen Level Elevation TPHg Benzene Toluene benzene Xylene MtBE <br /> Number Date (feet msl) (ft btc) (ft btc) (feet msl) µg/L µg/L µg/L _ gg/L µg/L µg/L <br /> Observations <br /> MW-5 06/2010I 15 10 <br /> 3882 -2372 78[3] 2 5[4] 5 5[4] -- 4 7[4] 11[4] 60[2] No FP,No S <br /> (cont) 09/12/01 15 10 4305 -27 95 <50 <2141 <2[4] <2[4] <2[4] 29[2] No FP,No S <br /> 12/12/01 1510 39 89 -24 79 <50 <1 0[4] <1 0[4] <1 0[4] 1 2[4] 25[2] No FP,No S <br /> 03/13/02 1510 3699 -2189 <50 <0 50 061 <0 50 <0 50 35[2] No FP,No S <br /> 06/18/02 1510 39 19 -2409 <50 <0 50 061 <0 50 330 7 8[21 No FP,No S <br /> 09/11/02 15 10 4433 -2923 63 3 4 50 19 14 9 1[2] No FP,No S <br /> 12/18/02 1510 4168 -2658 <50 <0 50 4 4 <0 50 5 8 20[2] No FP,No S <br /> MW-6 02/28/95 1455 5900 5454 -3999 55 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 05/19/95 1455 5259 -3804 96*** <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 08/28/95 1455 54 25 -3970 120 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 12/07/95 1455 5291 -38 36 <200** <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 02/05/96 1455 5039 -3584 130 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 05/30/96 1455 4738 -3283 140*** <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> 09/18/96 1455 5126 -3671 <200*** <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> 11/26/96 1455 4901 -3446 <200*** <0 5 <0 5 <05 <0 5 <4** No FP,No S <br /> 03/24/97 1455 4397 -2942 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> 05/20/97 1455 4452 -2997 180 <2** <0 5 <0 5 <0 5 <3 No FP,No S <br /> 08/19/97 1455 48 12 -3357 190 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 11/19/97 1455 4626 -3171 95 3 4 2 1 10 2 5 <5 No FP,No S <br /> 03/04/98 1455 4163 -2708 60 16 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 06/26/98 1455 3933 -2478 101 0 734 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 09/01/98 1455 4101 -2646 205 0 684 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 12/02/98 1455 38 42 -23 87 I24 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 03/31/99 1455 34 84 -2029 676 162 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 06/04/99 1455 3606 -2151 118 177 <0 5 <0 5 <0 5 8 86 No FP,No S <br /> 09/02/99 1455 40 63 -2608 201 284 <0 5 <0 5 <0 5 141 No FP,No S <br /> 11/29/99 1455 3878 -2423 53 0 839 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> 03/16/00 1455 3484 -2029 <50 <0 5 <0 5 <05 <0 5 <2 5 No FP,No S <br /> 06/26/00 1455 37 35 -2280 191 129 <0 5 <05 <0 5 <2[2] No FP,No S <br /> 09/28/00 1455 4161 -27 06 <50 250 <0 5 <0 5 <0 5 <2[2] No FP,No S <br /> Arco_2130_4QMR02 <br /> 6 of 12 <br /> I <br />