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Mel J <br /> Groundwater Monitoring Data Page 7 of 9 <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-6 08/19/97 1455 5900 4812 -3357 190 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-6 11/19/97 14 55 5900 4626 -1171 95 34 2 1 10 25 <5 No FP,No S <br /> MW-7 12/04/92 --- 5350 6251 --- 88 2 0 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 01/20/93 1416 5350 6095 -4679 NA NA NA NA NA NA No FP,No S <br /> MW-7 01/29/93 --- 5350 --- --- 67 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 03/22/93 1416 5350 5936 -4520 NA NA NA NA NA NA No FP,No S <br /> MW-7 04/06/93 1416 5350 5884 -4468 <50 <6** <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 07/30/93 1416 5350 5963 4547 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 11/29/93 1416 5350 58 62 -4446 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 03/23/94 1416 5350 5365 -3949 130 88 11 17 8 3 NA No FP,No S <br /> MW-7 06/22/94 1416 5350 5388 -3972 <10 <0 3 0 4 <0 3 <0 5 NA No FP,No S <br /> MW-7 09/28/94 1416 5350 5759 4343 <50 12 1 1 <0 5 <0 5 NA No FP,No S <br /> MW-7 12/01/94 1416 5350 5665 4249 <50 6 9 3 5 <0 5 3 8 NA No FP,No S <br /> MW-7 02/28/95 1416 5350 5361 -3945 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 05/19/95 1416 5350 5173 -3757 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 08/28/95 1416 5350 5351 -39 35 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 22/07/95 1416 5350 52 I0 -37 94 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 02/05/96 1416 5350 4958 -3542 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-7 05/30/96 1416 5350 4665 -3249 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-7 09/18/96 1416 5350 5043 -3627 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-7 11/26/96 1416 5350 4830 -34 14 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-7 03/24/97 1416 5350 4320 -29 04 <200*** <2** <0 5 <0 5 <0 5 <4** No FP,No S <br /> MW-7 05/20/97 1416 5350 4381 -2965 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S <br /> MW-7 08/19/97 1416 5350 4725 -3309 <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> MW-7 11/19/97 1416 5350 4542 -3126 <50 2 6 2 9 080 4 5 <5 No FP,No S <br /> MW-8 11/29/93 1416 5650 5886 -4440 69 <0 5 <0 5 <0 5 <0 5 NA No FP,No S <br /> MW-8 03/23/94 1416 5650 5361 -3945 340 57 66 9 3 42 NA No FP,No S <br /> MW-8 06/22/94 1416 5650 5375 -3959 <10 <0 3 <0 3 <0 3 <0 3 NA No FP,No S <br /> N V{t SV805S11408\122297MI X!S <br /> Sheet] <br /> sEmcon <br /> ,IjfnQ <br />