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• Table 1 <br /> Page 4 of 7 <br /> Groundwater Monitoring Data <br /> 1995 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 MTBF Observations <br /> MW-5 05/20/97 15 10 5800 4485 -2975 270 31 5 0 5 0 15 <20** No FP, No S <br /> MW-5 08/19/97 15 10 5800 4837 -33 27 100 20 <0 5 3 8 <05 <5 No FP, No S <br /> MW-5 11/19/97 1510 5800 4662 -3152 <50 12 094 <0 5 0 91 <5 No FP, No S <br /> MW-5 03/04/98 1510 5800 4190 -2680 <50 56 18 16 31 <5 No FP, No S <br /> MW-5 06/26/98 1510 5800 3964 -2454 <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 <05 139 0 535 515 No FP, No S <br /> MW-5 12/02/98 1510 5800 3874 -23 64 <50 0 693 <0 5 <0 5 <0 5 894 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 1455 5900 5259 -3804 96*** <0 5 <0 5 <0 5 <0 5 NA No FP, No S <br /> MW-6 08/28/95 1455 5900 5425 -3970 120 <05 <0 5 <05 <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 <0 5 <0 5 <05 NA No FP, No S <br /> MW-6 05/30/96 1455 5900 4738 -3283 140*** <0 5 <0 5 <05 <0 5 <3 No FP,No S <br /> MW-6 09/18/96 1455 5900 5126 -3671 <200*** <05 <0 5 <0 5 <0 5 <3 No FP, No S <br /> MW-6 11/26/96 1455 5900 4901 -3446 <200*** <0 5 <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 <0 5 <3 No FP, No S <br /> MW-6 05/20/97 1455 5900 44 52 -2997 180 <2** <0 5 <05 <0 5 <3 No FP, No S <br /> MW-6 08/19/97 1455 5900 4812 -3357 190 <05 <0 5 <05 <0 5 <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 <0 5 <05 <5 No FP, No S <br /> MW-6 06/26/98 1455 5900 3933 -24 78 101 0 734 <0 5 <0 5 <05 <5 No FP, No S <br /> MW-6 09/01/98 1455 5900 4101 -2646 205 0 684 <0 5 <0 5 <05 <5 No FP, No S <br /> MW-6 12/02/98 1455 5900 3842 -23 87 124 <0 5 <0 5 <0 5 <0 5 <5 No FP, No S <br /> CP1E\ARC012130\QTRLY\2130Q498?CLS <br /> Table 1 <br />