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i . • - <br /> Table 1 <br /> Groundwater Monitoring Data <br /> 1995 to Present <br /> ARCO Service Station No 2130 <br /> 7906 North EI Dorado Street, Stockton, California <br /> Elevation Static Water Groundwater Ethyl- Total <br /> Well Top of Casing Top of Screen Level Elevation TPHG Benzene 1 oluene benzene Xylene MTBE <br /> Number Date (feet msl) (feet b s) feet bgs) (feet msl) Pg/L FgIL pglL pg/l- µglL L Observations <br /> MW-4 02/28/95 1457 55 00 5427 -3970 <50 0 9 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW4 05/19/95 1457 5238 -37 81 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW4 08/28/95 1457 54 10 -3953 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-4 12/07/95 1457 5269 -38 12 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-4 02/05/96 1457 50 12 -35 55 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW4 05/30/96 1457 4721 -3264 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-4 09/18/96 1457 5180 -3723 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-4 11/26/96 1457 48 84 -3427 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW4 03/24/97 1457 4384 -2927 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> AIW-4 05/20/97 1457 4434 -2977 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> IWW-4 08/19/97 1457 47 89 -33 32 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 14W-4 11/19/97 1457 4601 -3144 <50 1 1 068 <0 5 054 <5 No FP,No S <br /> MW-4 03/04/98 14 57 4164 -2707 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW4 06/26/98 1457 39 16 -2459 <50 141 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW4 09/01/98 1457 41 83 -2726 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-4 12/02/98 1457 3822 -23 65 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-4 03/31/99 1457 3477 -2020 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-4 06/04/99 14 57 35 86 -2129 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW4 09/02/99 1457 4059 -2602 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-4 11/29/99 1457 3878 -24 21 <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> MW-4 03/16/00 14 57 34 75 -20 18 <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> MW-4 06/26/00 1457 3721 -2264 <50 <0 5 <0 5 <0 5 <0 5 <2[2] No FP,No S <br /> MW-4 09/28/00 1457 4158 -2701 <50 <0 5 <0 5 <0 5 <0 5 <2[2] No FP,No S <br /> MW4 12/19/00 1457 372 -2263 <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> C 1ARC012 E 301QTRLY1200012130g400 xis Delta <br /> 4 of 10 1130101 <br />