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Tie 1 <br /> Page 4 of 7 <br /> Groundwater Monitoring Data <br /> 1996 to Present <br /> ARCO Service Station No. 2130 <br /> 7906 North EI Dorado Street, Stockton, California <br /> Well Elevation Static Water Groundwater Ethyl- Total <br /> Number Date Top of Casing Top of Screen Level Elevation TPHG Benzene Toluene benzene Xylene MTBE Observations <br /> MW-5 06/26/98 1510 5800 3964 -24 54 <50 4 19 0 624 0 794 0 999 <5 No FP, No S <br /> MW-5 09/01/98 1510 5800 4144 -2634 <50 13 2 <0 5 139 0 535 515 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 /> MW-6 05/19/95 14 55 5900 5259 -38 04 96*** <05 <0 5 <0 5 <0 5 NA No FP, No S <br /> MW-6 08/28/95 1455 5900 5425 -3970 120 <0 5 <0 5 <0 5 <0 5 NA No FP, No S <br /> MW-6 12/07/95 1455 5900 5291 -3836 <200** <0 5 <05 <0 5 <0 5 NA No FP, No S <br /> MW-6 02/05/96 1455 5900 5039 -3584 130 <0 5 <05 <0 5 <0 5 NA No FP, No S <br /> MW-6 05/30/96 1455 5900 4738 -3283 140*** <0 5 <0 5 <0 5 <0 5 <3 No FP, No S <br /> MW-6 09/18/96 1455 5900 5126 -3671 <200*** <05 <0 5 <05 <0 5 <3 No FP, No S <br /> MW-6 11/26/96 1455 5900 4901 -3446 <200*** <05 <0 5 <0 5 <0 5 <4** No FP, No S <br /> MW-6 03/24/97 1455 5900 4397 -2942 <50 <0 5 <0 5 <0 5 <05 <3 No FP, No S <br /> MW-6 05/20/97 1455 5900 4452 -2997 ISO <2** <0 5 <0 5 <05 <3 No FP, No S <br /> MW-6 08/19/97 1455 5900 4812 -3357 190 <0 5 <05 <0 5 <05 <5 No FP, No S <br /> MW-6 11/19/97 1455 5900 4626 -3171 95 3 4 21 10 2 5 <5 No FP, No S <br /> MW-6 03/04/98 1455 5900 4163 -2708 60 16 <05 <05 <0 5 <5 No FP,No S <br /> MW-6 06/26/98 1455 5900 3933 -2478 101 0 734 <05 <05 <0 5 <5 No FP,No S <br /> MW-6 09/01/98 1455 5900 4101 -2646 205 0 684 <05 <05 <0 5 <5 No FP,No S <br /> I <br /> MW-7 02/28/95 1416 5350 5361 -3945 <50 <0 5 <05 <05 <0 5 NA No 1'P, No S <br /> MW-7 05/19/95 1416 5350 5173 -3757 <50 <0 5 <05 <0 5 <0 5 NA No FP, No S <br /> MW-7 08/28/95 1416 53 50 5351 -3935 <50 <0 5 <0 5 <0 5 <0 5 NA No FP, No S <br /> MW-7 12/07/95 1416 5350 5210 -3794 <50 <0 5 <0 5 <0 5 <0 5 NA No FP, No S <br /> MW-7 02/05/96 1416 5350 4958 -3542 <50 <0 5 <0 5 <0 5 <0 5 NA No FP, No S <br /> MW-7 05/30/96 1416 53 50 4665 -3249 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> I <br /> I <br /> CPU]1QMR13RDQTRARC012130Q398 X1.,5 <br /> Table 1 <br /> �uuutc�e <br /> 11/16/98 <br />