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Ae 1 <br /> Page 3 of 10 <br /> Groundwater Monitoring Data <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-2 09/28/94 15 19 6000 5906 4387 1,600 370 2 9 47 13 NA No FP,No S <br /> MW-2 12/01/94 15 19 6000 5800 4281 220 21 <0 5 2 6 <0 5 NA No FP,No S <br /> MW-2 02/28/95 15 19 6000 5508 -3989 110 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-2 05/19/95 15 19 6000 53 15 -3796 400 23 <0 5 21 <0 5 NA No FP,No S <br /> MW-2 08/28/95 15 19 6000 5483 -3964 650 84 <I* 9 3 1 1 NA No FP,No S <br /> MW-2 12/07/95 15 19 6000 5347 -3828 540 18 <1* 3 <1* NA No FP,No S <br /> MW-2 02/05/96 15 19 6000 51 93 -3674 310 2 8 0 6 1 3 0 8 NA No FP,No S <br /> MW-2 05/30/96 15 19 6000 4791 -3272 510 31 10 59 1 3 <7** No FP,No S <br /> MW-2 09/18/96 15 19 6000 5180 -3661 920 150 <2 5* 22 35 <15* No FP,No S <br /> MW-2 11/26/96 15 19 6000 4960 -3441 520 21 <0 5 2 7 0 6 7 No FP,No S <br /> MW-2 03/24/97 15 19 6000 4450 -2931 <500*** <3** <3** <3** <3** <20** No FP,No S <br /> MW-2 05/20/97 15 19 6000 4509 -2990 720 71 <1* 13 1 1 <6* No FP,No S <br /> MW-2 08/19/97 15 19 6000 4869 -33 50 1,200 240 <5 41 <5 <50** No FP,No S <br /> MW-2 11/19/97 15 19 6000 4677 -3158 <50 1 7 0 89 <0 5 087 <5 No FP,No S <br /> MW-2 03/04/98 15 19 6000 42 18 -2699 <50 2 2 <0 5 <0 5 <0 5 5 1 No FP,No S <br /> MW-3 01/07/92 1610 6000 63 05 -4704 2,100 41 <3 0 <3 0 57 NA No FP,No S <br /> MW-3 02/24/92 1610 6000 6237 -4663 NA NA NA NA NA NA No FP,No S <br /> MW-3 03/31/92 1610 6000 62 17 -46 16 NA NA NA NA NA NA No FP,No S <br /> MW-3 04/21/92 1610 6000 6251 -4641 110 4 9 <0 5 <0 5 4 6 NA No FP,No S <br /> MW-3 05/11/92 1610 6000 63 17 4707 NA NA NA NA NA NA No FP,No S <br /> MW-3 06/23/92 1610 6000 6326 4716 NA NA NA NA NA NA No FP,No S <br /> MW-3 07/08/92 16 10 6000 6450 4840 55 15 <0 5 <0 5 12 NA No FP,No S <br /> MW-3 08/10/92 16 10 6000 6543 4933 NA NA NA NA NA NA No FP,No S <br /> MW-3 09/15/92 1610 6000 6607 4997 NA NA NA NA NA NA No FP,No S <br /> MW-3 10/06/92 1610 6000 6620 -50 10 300 5 8 <0 5 <0 5 18 NA No FP,No S <br /> MW-3 11/11/92 1610 6000 6550 -4940 NA NA NA NA NA NA No FP,No S <br /> N ALS108051114091032698RI US <br /> Sheet/ <br /> Pow"& <br /> 05/08/98 <br />