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TABLE 1 <br /> GROUNDWATER MONITORING DATA <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 Toluene benzene Xylene MtBE <br /> Number Date (feet msl) (ft btc) (ft btc) (feet ms]) ug/L yglL pg/L Pg/L ug/L ug/L Observations <br /> MW-6 1212198 1455 38 42 -2387 124 <0 5 <0 5 <0 5 <0 5 <5 No FP, No S <br /> (cont) 3/31/99 1455 3484 2029 676 1 62 <0 5 <0 5 <0 5 <5 No FP, No S <br /> 614199 1455 3606 -21 51 118 1 77 <0 5 <05 <0 5 886 No FP, No S <br /> 912/99 1455 4063 -2608 201 2 84 <0 5 <05 <0 5 141 No FP, No S <br /> 11/29/99 1455 38 78 -2423 53 0 839 <05 <05 <0 5 <2 5 No FP, No S <br /> 03/16/00 1455 34 84 2029 <50 <05 <0 5 <05 <0 5 <2 5 No FP, No S <br /> 6/26/00 1455 3735 -2280 191 1 29 <05 <0 5 <05 <2[2] No FP, No S <br /> 9128100 1455 41 51 -2706 <50 250 <0 5 <05 <05 <2[2] No FP, No S <br /> 12/19/00 1456 3739 -2284 <50 1 56 <0 5 <0 5 <0 5 <2 5 No FP, No S <br /> 3115101 1455 3514 -2059 <50 <2[4] <2[4] <2[4] <2[4] <2[2] No FP, No S <br /> 6120101 1455 3835 -2380 <50 <2[4] <2[4] <2[4] <2[4] <2[2] No FP, No S <br /> 9/12/01 1455 4268 -2813 <50 <2[4] <2[4] <2[4] <2[4] <2[2] No FP, No S <br /> 12/12/01 1455 39 50 -2495 73[6] <1 0[4] <1 0[4] <1 0[4] <1 0[4] <0 50[2] No FP, No S <br /> 3/13102 1455 3663 -2208 <50 <0 50 <0 50 <0 50 <0 50 <0 50[2] No FP, No S <br /> 6/18/02 1455 38 74 -2419 <50 <0 50 <0 50 <0 50 <0 50 <0 50[2] No FP, No S <br /> 9/11/02 1455 4384 -2929 <50 <0 50 <0 50 <0 50 <0 50 <0 50[2] No FP, No S <br /> 12/18/02 1455 4132 -2677 71 0 <0 50 <0 50 <0 50 <0 50 <0 50[2] No FP, No S <br /> 316103 1455 3900 -2445 200 <0 5 <0 5 <0 5 <0 5 <0 5[2] No FP, No S <br /> MW-7 2/28/95 1416 53 50 53 61 -39 45 <50 <0 5 <0 5 <0 5 <0 5 NA No FP, No S <br /> 5/19195 1416 51 73 -3757 <50 <0 5 <0 5 <0 5 <0 5 NA No FP, No S <br /> 8128195 1416 5351 3935 <50 <0 5 <05 <0 5 <0 5 NA No FP, No S <br /> 1217/95 1416 5210 -37 94 <50 <0 5 <0 5 <05 <0 5 NA No FP, No S <br /> 215/96 1416 4958 -35 42 <50 <0 5 <0 5 <0 5 <0 5 NA No FP, No S <br /> 5130196 1416 4665 -3249 <50 <0 5 <05 <0 5 <05 <3 No FP, No S <br /> 9118196 1416 5043 -3627 <50 <0 5 <05 <05 <0 5 <3 No FP, No S <br /> 11/26/96 1416 48 30 -3414 <50 <05 <05 <0 5 <0 5 <3 No FP, No S <br /> 3/24/97 1416 4320 -29 04 <200*** <2** <05 <05 <0 5 <4** No FP, No S <br /> 5120197 1416 43 81 -2965 <50 <05 <0 5 <0 5 <0 5 <3 No FP, No S <br /> 8/19197 1416 4725 -33 09 <50 <05 <0 5 <0 5 <0 5 <5 No FP, No S <br /> K IWprocess1,15 BP AR=21301Quarterly\1 QTR 0312130 GWMR 1Q03 7 of 13 <br />