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TABLE 2 <br /> Historical Groundwater Monitoring &Analytical Data <br /> ARCO Station No.443 <br /> 2478 East Oak Street, Stockton, CA <br /> TOC Depth to Measured Calc. <br /> Well No. Date Notes Elevation Water SPH GW GRO B T EX MTBE TBA DIPE ETRE TAME 1,2-DCA EDB D.O. Comments <br /> (ft-MSL) (feet) Thickness Elev. (p9/L) (P911.) Wg/L) (p9/L) (pg/L) (p9IL) (p9/L) (pgiL) (pg/L) (p9/L) (pg/L) (pg/L) (m9/L) <br /> (feet) (ft-MSL) <br /> MW-1D 07/30/07 22.94 46.30 0.00 -23.36 67,000 3,000 14,ODD 2,700 12,000 <50 <2000 <50 <50 <50 200 75 1.6 Well Developed <br /> 09117/07 47.30 0,00 -24.36 59,000 3,300 16,000 3,200 14,000 .100 .4,000 <100 <100 <100 160 <100 2.2 <br /> MW-1S 07/30/07 22.68 45.93 0.00 -23.25 930,000 13,000 58,000 17,000 79,000 .500 <20,000 <500 <500 <500 1,500 510 1.6 Well Developed <br /> 09117/07 47.14 0.00 -24.46 380,000 13,000 47,000 8,600 42,000 <250 <10,000 <260 <250 <260 1,400 390 2.9 <br /> MW-2S 07/30/07 22.51 45.72 0.00 -23.21 60,000 12,000 8,400 3,400 11,000 <100 <4,000 .100 <100 <100 2,200 <100 1.3 Well Developed <br /> 09/17/07 46.80 0.00 -24.29 53,000 12,000 7,000 3,800 12,000 <100 <4,000 <100 <100 <100 2,300 <100 1.8 <br /> MW-3S 07/30/07 23.42 46.64 0.00 -23.22 1,200 130 9.7 <5.0 46 <5.0 <200 <5.0 <5.0 <5.0 630 <5.0 1.2 Well Developed <br /> 09/17/07 47.79 0.00 -24.37 830 N 79 14 5.4 38 <6.0 <200 <6.0 <5.0 <5.0 620 <5.0 2.7 <br /> MW-4S 07/30/07 22.96 46.15 0.00 -23.19 200 .0.50 0.64 <0.50 1.3 <0.50 <20 .0.50 <0.50 .0.50 7.8 <0.50 1.2 Well Developed <br /> 09/17/07 47.33 0.00 -24.37 200 2.1 <0.60 .0.50 <0.50 <0.60 <20 <0.60 <0.50 <0.50 4.9 <0.60 2.9 <br /> V ,I <br /> 443 3Q07 Tables.xls Page 1 of 2 SECOR <br />