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f <br /> TABLE 1 <br /> i <br /> GROUNDWATER MONITORING DATA <br /> ARCO Service Station No. 5469 <br /> 130 South Wilson Way, Stockton, California <br /> Elevation Top of Well Static Water Groundwater Ethyl- Total <br /> WeII Top of Casing Screen Level Elevation TPHG Benzene Toluene benzene Xylene MTBE[l] <br /> Number Date feet msl (feet b s) (feet b s (feet msl pg/L µg/L gg/L pg/L µg/L µg/L <br /> MW-5 NP 06/21/00 16.01 33 36.58 -20.57 <50 <2.0 <2.0 <2.0 <2.0 8,370[2] <br /> NP 09/08/00 16.01 38.21 -22.20 <50 <0.5 <0.5 <0.5 <0.5 9,870[2] <br /> NP 12/11/00 16.01 38.45 -22.44 <500[5] <5.0[5] <5.0[5] <5.0[5] <5.0[5] 12,200[2] <br /> P 03/22/01 16.01 37.33 -21.32 <500[5] <5.0[5] <5.0[5] <510[51 <5.0[5] 15,600[23 <br /> P 05/24/01 16.01 37.05 -21.04 <500[51 <5.0[51 <5.0[5] <5.0[5] <5.0[51 14,400[2] <br /> 06/25/01 16.01 37.60 -21.59 NS NS NS NS NS NS <br /> MW-6 NP 06/2I/00 15.89 33 36.42 -20.53 <50 <2.0 <2.0 <2.0 <2.0 4,120[2] <br /> NP 09/08/00 15.89 38.07 -22.18 <50 <0.5 <0.5 <0.5 <0.5 6,320[2] <br /> NP 12/11/00 15.89 38.39 -22.50 <500[5] <5.0[5] <5.0[51 <5.0[5] <5.0[5] 6,910[2] <br /> P 03/22/01 15.89 37.13 -21.24 <500[5] <5.0[51 <5,0[5] <5.0[51 <5.0[51 8,290[2] <br /> P 05/24/01 15.89 36.85 -20.96. <500[51 <5.0[5] <5.0[5] <5.0[5] <5.0[5] 16,100[2] <br /> 06/25/01 15.89 37.36 -21.47 NS NS NS NS NS NS <br /> MW-7 06/25/01 16.49 33 38.20 -21.71 NS NS NS NS NS NS <br /> P 06/28/01 16.49 38.34 -21.85 <50 <0.5 <0.5 <0.5 <0.5 <2.0[2] <br /> MW-8 06/25/01 16.46 33 38.10 -21.64 NS NS NS NS NS NS <br /> P 06/28/01 16.46 38.23 -21.77 <5000[6] 2,300 <50[6] <50[6] <50[6] 1,600[2] <br /> i <br /> MW-9 06/25/01 16.21 59 37.91 -21.70 NS NS NS NS NS NS <br /> P 06/28/01 16.21 38.05 -21.84 <50 <0.5 <0.5 <0.5 <0.5 <2.0[2] <br /> I <br /> MW-10 06/25/01 16.40 59 38.00 -21.60 NS NS NS NS NS NS <br /> P 06/28/01 16.40 38.18 -21.78 <50 51 <0.5 <0.5 <0.5 260[2] <br /> i <br /> f <br /> 5469QUARTERLY Delta <br /> 2 of 3 <br /> 8121/01 <br />