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TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> ARCO Service Station No 2130 <br /> 7906 North El Dorado Street, Stockton, California <br /> Elevation Static Water Groundwater Ethyl- Total <br /> Well Top of Casing Top of Screen Level Elevation TPHg Benzene Toluene benzene Xylene MtBE <br /> Number Date_ __ (feet msl) (ft btc) (ft btc) (feet msl) ag/i,_- µg/L 9-FA µg/L, µg/l, _ [ISL Observations <br /> MW-10 11/19/97 1438 4595 -3157 510 2 2 2 2 093 3 1 <5 No FP,No S <br /> (cont) 03/04/98 1438 4143 -27 05 110 066 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 06/26/98 1438 3911 -2473 329 475 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 09/01/98 1438 4078 -2640 295 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 12/02/98 1438 3823 -23 85 407 689 <0 5 <0 5 0 873 195 No FP,No S <br /> 03/31/99 1438 3471 -2033 217 641 0 948 0 763 2 69 748 No FP,No S <br /> 06/04/99 1438 3586 -2148 288 <0 5 <0 5 <0 5 <0 5 653 No FP,No S <br /> 09/02/99 1439 4026 -25 88 152 <0 5 <0 S <0 5 <0 5 <5 No FP,No S <br /> 11/29/99 1438 3858 -2420 198 358 <0 5 <0 5 061 908 No FP,No S <br /> 03/16/00 1438 3469 -2031 270 074 <0 5 <0 5 <0 5 595 No FP,No S <br /> 06/26/00 1438 3705 -2267 389 <0 5 <0 5 <0 5 <0 5 <2[2] No FP,No S <br /> 09/28/00 1438 4128 -2690 <50 0 870 <0 5 <0 5 <0 5 <2[2] No FP,No S <br /> 12/19/00 1438 3720 -22 82 <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S <br /> 03/15/01 NM NM NE Well Covered Not observed <br /> 06/20/01 NM 3698 NE 11,000[5] <2 [4) <2 [4] <2 [4] <2 [4] <2[2] No FP,No S <br /> 09/12/01 NM NM NE Well Covered Not observed <br /> 12/12/01 NM NM NE Well Covered Not observed <br /> 03/13/02 NM NM NE Well Covered Not observed <br /> 06/18/02 NM NM NE Well Covered <br /> 09/11/02 NM NM NE Well Covered <br /> 12/18/02 NM NM NE Well Covered <br /> VW-1 05/20/97 NM 4400 44 16 NE 340,000 330 540 2,100 13,000 <1,200* No FP,No S <br /> 09/01/98 NM 4175 NE NA NA NA NA NA NA NA <br /> 12/02/98 NM 3843 NE NA NA NA NA NA NA NA <br /> 03/31/99 NM 3891 NE NA NA NA NA NA NA NA <br /> 06/04/99 NM 3578 NE NA NA NA NA NA NA NA <br /> 09/02/99 NM 4030 NE NA NA NA NA NA NA NA <br /> 11/29/99 NM 3849 NE NA NA NA NA NA NA NA <br /> 03/16/00 NM 3452 NE NA NA NA NA NA NA NA <br /> 06/26/00 NM 37 08 NE NA NA NA NA NA NA NA <br /> Arco_2130_4QMR02 <br /> 9 of 12 <br />