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TABLE 1 a <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 feet b s feet b s feet nisi L IL VLIL IL L IL Observations- <br /> MW-6 02/28/95 1455 5900 54 54 -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 5425 -3970 120 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 12/07/95 1455 52 91 -3836 <200** <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> 02/05/96 1455 5039 -35 84 130 <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 <0 5 <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 18D <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 3842 -23 87 124 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 03/31/99 1455 3484 -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 5 886 No FP,No S <br /> 09/02/99 1455 4063 -2608 201 2 84 <0 5 <0 5 <0 5 141 No FP,No S <br /> 11/29/99 1455 3878 -24 23 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 <0 5 <0 5 <2 5 No FP,No S <br /> 06/26/00 1455 3735 -2280 191 129 <0 5 <0 5 <0 5 <2[2] No FP,No S <br /> 09/28/00 1455 41 61 -2706 <50 250 <0 5 <0 5 <0 5 <2[2] No FP,No S <br /> 12/19/00 1455 3739 -22 84 <50 156 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> 03/15/01 1455 35 14 -2059 <50 <2 [4] <2 [4] <2 [4] <2 [4] <2[2] No FP,No S <br /> 06/20/01 1455 3835 -2380 <50 <2 [4] <2 [4] <2 [4] <2 [4] <2[2] No FP,No S <br /> C IAKC012130IQTKLY120001Arco 2130 Quarterly Data XLS <br /> Delta <br /> 6 of 12 8124101 <br />