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T`a.,LE 1 <br /> Groundwater Monitoring and Analytical Data <br /> Former ARCO Service Station No.2168 <br /> 441 Charter Way <br /> Stockton,California <br /> Elevation <br /> Top of Static Water Groundwater Depth to Ethyl- Total Dissolved <br /> Well ID Casing(feet Level Elevation Screen TPHG Benzene Toluene benzene Xylenes MtBE Oxygen <br /> &Sample Date msl) (feet bgs) (feet msl) (feet bgs) ug/L ug/L ug/L ug/L ug/L ug/L (mg/L) <br /> 05/1701 19.22 -10.34 2,320[5] 20.7 11.9 40.7 99.1 <10 0.8 <br /> MW-7 8/16/2001 20.59 -11.71 2,200 30 14 49 95 <2 0.6 <br /> (cont) 12/6/2001 21.63 -12.75 6,800 580 270 210 930 <5.0* 0.9 <br /> 2/14/2002 20.03 -11.15 62[8] <0.50 <0.50 0.53 <0.50 <0.50 2.4 <br /> 6/13/2002 20.35 -11.47 1,400[8] 2.9 4.0 12 13 <0.50 1.4 <br /> 8/22/2002 21.38 -12.50 1,400 11 <5.0 15 10 <0.50 0.9 <br /> 11/13/2002 22.33 -13.45 1,400 40 <10 18 34 <10 -- <br /> 2/12/2003 23.16 -14.28 820 <5.0 <5.0 <5.0 <5.0 <5.0 2.0 <br /> 5/29/2003 20.80 -11.92 380 <0.5 <0.5 1.9 1.3 <1.0 5.0 <br /> MW-8 8/30/2000 9.35 18.85 -9.50 15.0 115 <2 <2 <2 <2 <2 NA <br /> 11/21/2000 19.30 -9.95 <50 <0.5 <0.5 <0.5 <0.5 <2 NA <br /> 2/15/2001 18.83 -9.48 <50 <0.5 <0.5 <0.5 <0.5 <2 1.2 <br /> 5/17/2001 18.90 -9.55 <50 <0.5 <0.5 <0.5 <0.5 <2 2.6 <br /> 8/16/2001 20.12 -10.77. <50 <0.5 <0.5 <0.5 <0.5 <2 0.9 <br /> 12/6/2001 18.29 -8.94 <50 <0.50 <0.50 <0.50 <0.50 <0.50 1.6 <br /> 2/14/2002 19.27 -9.92 <50 <0.50 <0.50 <0.50 <0.50 <0.50 3.1 <br /> 6/13/2002 19.73 -10.38 <50 <0.50 <0.50 <0.50 <0.50 <0.50 1.2 <br /> 8/22/2002 20.78 -11.43 76 23 0.52 5.6 4.4 <0.50 1.8 <br /> 11/13/2002 20.85 -11.50 <50 <0.50 <0.50 <0.50 <0.50 <0.50 -- <br /> 2/12/2003 24.17 -14.82 <50 <0.5 <0.5 <0.5 <0.5 <0.5 2.7 <br /> 5/29/2003 20.58 -11.23 X50 <0.5 <0.5 <0.5 <0.5 <0.5 5.0 <br /> MW-8B 8/30/2000 9.61 20.27 -10.66 75.0 1,130 425 49.6 106 108 <2 NA <br /> 11/21/2000 20.88 -11.27 924[4] 241 23.4 52.5 10.9 <2 NA <br /> 2/15/2001 --� " y� 20.88 -11.27 811 [7] 159 29.8 49.0 49.2 <2 1.3 <br /> 5/17/2001 -- l 3. 3 l 20.24 -10.63 137[5] 50.4 1.32 9.47 4.3 <2 2.5 <br /> 8/16/2001 21.64 -12.03 63 12 0.79 7.6 4.2 <2 1.8 <br /> 12/6/2001 22.58 -12.97 94[8] 40 <0.50 5.5 1.7 <0.50 1.1 <br /> 2/14/2002 21.06 -11.45 <50 4.9 <0.50 <0.50 <0.50 1.1 1.6 <br /> 6/13/2002 21.34 -11.73 <50 12[11] <0.50 1.3[11] 1.5[11] <0.50 3.3 <br /> 8/22/2002 22.43 -12.82 <50 <0.50 <0.50 <0.50 <0.50 <0.50 3.2 <br /> 11/13/2002 23.56 -13.95 <50 <0.50 <0.50 <0.50 <0.50 <0.50 -- <br /> 2/12/2003 24.01 -14.40 <50 <0.5 <0.5 <0.5 <0.5 -- 1.9 <br /> 5/29/2003 21.89 -12.28 X50 <0.5 <0.5 <0.5 <0.5 <0.5 6.0 <br /> 1-14.6 <br /> k:V5 BP ARCO\02168\Quarterly\2168 GWMR 2Q03.xls <br /> 8 of 9 <br />