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TOL I <br /> Page 1 of 10 , <br /> Groundwater Monitoring Data <br /> ARCO Service Station No. 2130 <br /> 7906 North El 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-1 01/07/92 1458 6000 6148 -4690 18,000 1,600 610 140 850 NA No FP,No S <br /> MW-1 02/24/92 1458 6000 6076 4618 NA NA NA NA NA NA No FP,No S <br /> MW-1 03/31/92 1458 6000 6056 -4533 NA NA NA NA NA NA No FP,No S <br /> MW-1 04/21/92 1458 6000 6091 -4633 5,200 1,400 360 53 260 NA No FP,No S <br /> MW-1 05/11/92 1458 6000 6157 -4699 NA NA NA NA NA NA No FP,No S <br /> MW-1 06/23/92 1458 6000 6168 -4710 NA NA NA NA NA NA No FP,No S <br /> MW-1 07/08/92 1458 6000 6284 4826 6,500 1,900 320 89 230 NA No FP,No S <br /> MW-1 08/10/92 1458 6000 63 74 -4916 NA NA NA NA NA NA No FP,No S <br /> MW-1 09/15/92 1458 6000 6437 -4979 NA NA NA NA NA NA No FP,No S <br /> MW-1 10/06/92 1458 6000 6452 -4994 11,000 2,500 600 210 470 NA No FP,No S <br /> MW-1 11/11/92 1458 6000 6383 -4925 NA NA NA NA NA NA No FP,No S <br /> MW-1 12/04/92 1458 6000 63 10 -4852 NA NA NA NA NA NA No FP,No S <br /> MW-1 01/20/93 1458 6000 6183 -4725 1,800 260 100 10 34 NA No FP,No S <br /> MW-1 03/22/93 1458 6000 5995 -4537 NA NA NA NA NA NA No FP,No 3 <br /> MW-1 04/06/93 1458 6000 5947 4489 1,500 250 64 30 76 NA No FP,No S <br /> MW-1 07/30/93 1458 6000 60 19 -4561 2,100 390 130 38 79 NA No FP,No S <br /> MW-1 11/29/93 1458 6000 5929 4471 1,200 230 12 11 16 NA No FP,No S <br /> MW-1 03/23/94 1458 6000 5433 -3975 I,900 120 82 25 75 NA No FP,No S <br /> MW-1 06/22/94 1458 6000 5411 -3988 910 13 4 0 41 1 9 NA No FP,No S <br /> MW-1 09/28/94 1458 6000 58 17 4359 420 6 8 14 2 9 <0 5 NA No FP,No S <br /> MW-1 12/01/94 1458 6000 57 11 4253 220 2 4 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-1 02/28/95 1458 6000 5421 -3963 340 21 <0 5 0 6 <0 5 NA No FP,No S <br /> MW-1 05/19/95 1458 6000 5241 -3783 210 2 9 <0 5 0 7 <0 5 NA No FP,No S <br /> MW-1 08/28/95 1458 6000 5404 -3946 240 3 2 <0 5 10 <0 5 NA No FP,No S <br /> MW-1 12/07/95 1458 6000 5267 -3809 190 17 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-1 02/05/96 1458 6000 5011 -3553 230 2 5 <0 5 05 <0 5 NA No FP,No S <br /> MW-1 05/30/96 1458 6000 47 17 -3259 180*** 12 <0 5 <0 5 <0 5 <4** No FP,No S <br /> N IXLS108051114091032698R1 XLS <br /> Sheet/ <br /> �LK�IQ.CQE <br /> 05/08/98 <br />