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• Tab* <br /> Groundwater Monitoring Data <br /> 1995 to Present <br /> ARCO Service Station No 548, 1612 Hammer Lane, Stockton, California <br /> Well Elevation Static Top Elevation Groundwater <br /> Sample of Top Water of of FloiN Ethyl- Total <br /> Number Date of Casing Levcl Screen Groundi►ater DireLtIon TPHG Benzene Toluene bCWLnC X lenes MTBE [11 Okervattons <br /> MW-4 (63) 02/15/95 11 57 42 12 4400 -3055 E <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE <br /> MW-4 (63) 05/12/95 1157 4028 -2871 E <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0 <br /> MW-4 (63) 08/29/95 1157 41 72 -30 15 E <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0 <br /> MW-4 (63) 12/04/95 1157 4044 -2887 E <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0 <br /> MW-4 02/02/96 1157 3854 -2697 L <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0 <br /> MW-4 (63) 05/10/96 1157 3602 -2445 E <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No O <br /> MW-4 (63) 08/29/96 1157 3760 -2603 E <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0 <br /> MW-4 (63) 11/20/96 1157 3671 -25 14 L <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0 <br /> MW-4 (63) 03/19/97 1157 33 08 -2151 E-SE <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0 <br /> MW-4 05/27/97 1157 33 21 -2164 E-SE <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0 <br /> MW-4 (62) 08/12/97 1157 3445 -2288 E <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0 <br /> MW-4 (64) 11/18/97 1157 34 31 -2274 L <50 4 5 2 5 091 2 1 <5 No FP,No S,No 0 <br /> MW-4 (63 8) 02/16/98 1157 31 17 -1960 SE <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0 <br /> MW4 (62) 06/23/98 [P] 1157 2852 -1695 SE <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0 <br /> MW-4 (62) 09/29/98 [P] 1157 30 13 -1856 E <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0 <br /> MW-4 12/30/98 1157 NM -- SE -----------------------Well inaccessible-------------------------- <br /> MW4 (62) 03/31/99 [P] 1157 2669 -15 12 E-SE <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0 <br /> MW-4 (62) 06/28/99 [P] 1157 2766 -1609 SE <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0 <br /> MW-4 (62) 09/10/99 [P] 1157 29 54 -1797 E <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0 <br /> MW-4 (62) 12/13/99 [P] 1157 2880 -1723 L <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S,O=NE <br /> MW-4 (6 2) 03/28/00 [P] 1157 25 71 -14 14 SE <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S,No 0 <br /> MW-4 (63) 06/26/00 [P] 1157 2653 -1496 E <50 <0 5 <0 5 <0 5 <0 5 <2 0[2] No FP,No S,No 0 <br /> C IARC0105481QTRLYW548g200 As Delta <br /> Page 4 of 9 9120100 <br />