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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No. 5450 <br /> 1617 W. Fremont Street, Stockton, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) WL) (pg1L) (P91L) (pg1L) (pglL) (Ng/L) (Erg/L) (mg/L) Comments <br /> MW-2 9!11!2002 P 8.67 11.37 -2.70 98 -- <0.50 <0.50 <0.50 <0.50 62 - <br /> 11/27/2002 P 8.67 10.90 -2.23 <50 - <0.50 <0.50 <0.50 <0.50 43 2.2 <br /> 03!1412003 P 8.67 10.60 -1.93 <50 - <br /> <0.50 <0.50 <0.50 <0.50 28* 5.2 <br /> 04/24/2003 P 8.67 10.72 -2.05 <50 - <0.50 <0.50 <0.50 <0.50 30* 2.4 <br /> 08114/2003 P 8.67 11.30 -2.63 <50 - <br /> <0.50 <0.50 <0.50 <0.50 18* 2.3 <br /> 11/06/2003 P 8.67 11.68 -3.01 <50 -- <2.5 <2.5 <2.5 <2.5 36* 2.2 <br /> 02/26/2004 P 8.67 10.62 -1.95 <50 -- <0.50 <0.50 <0.50 <0.50 19* 2.8 <br /> 05111/2004 P 8.67 12.80 -4.13 <50 -- <0.50 <0.50 <0.50 <0.50 4.2* -- <br /> i <br /> MW-3 9/11/2002 P 8.77 11.35 -2.58 <50 -- <0.50 <0.50 <0.50 <0.50 0.77 -- <br /> 11/27/2002 P 8.77 31.17 -2.40 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50 1.8 <br /> 03/14/2003 P 8.77 10.48 -1.71 <br /> <50 - <0.50 <0.50 <0.50 <0.50 <0.50* 0.50 <br /> 04124!2003 P 8.77 10.50 -1.73 <50 -- <br /> <0.50 <0.50 <0.50 <0.50 <0.50* 2.8 <br /> 08/14/2003 P 8.77 11.23 -2.46 <50 <0.50 <0.50 <0.50 <0.50 <0.50* 2.1 <br /> 11!0612003 P 8.77 11.56 -2.79 <50 - <br /> <0.50 <0.50 <0.50 <0.50 <0.50* 1.9 <br /> 02!2612004 P 8.77 9.45 -0.68 <br /> <50 -- <0.50 <0.50 <0.50 <0.50 <0.50* 2.2 <br /> 05/11/2004 P 8.77 10.73 -1.96 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50* 3.0 <br /> MW-4 9/11/2002 P 8.66 11.34 -2.68 <50 <0.50 <0.50 <0.50 <0.50 <0.50 - <br /> 11/27/2002 P 8.66 11.19 -2.53 <br /> <50 - <0.50 <0.50 <0.50 <0.50 <0.50 1.1 <br /> 03/14/2003 P 8.66 10.60 -1.94 <50 -- <0.50 <0.50 <0.50 <0.50 0.69* 1.5 <br /> 04/24/2003 P 8.66 10.77 -2.11 <50 -- <0.50 <0.50 <0.50 <0.50 0.66* 2.7 <br /> 50 <br /> 0811412003 P 8.66 11.28 -2.62 < - <0.50 1 <0.50 <0.50 <0.50 1.5* 2.6 <br /> 11/06/2003 P 8.66 11.46 -2.80 <50 -- <0.50 <0.50 <0.50 <0.50 1.4* 2.7 <br /> 02/26/2004 P 8.66 9.82 -1.16 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50* -- <br /> 05/11/2004 P 8.66 10.76 -2.10 <50 -- <0.50 <0.50 <0.50 <0.50 0.54" 3.0 <br /> TPHg=Total petroleum hydrocarbons as gasoline(reported as gasoline range organics(GRO)in the analytical report) <br /> TPHd=Total petroleum hydrocarbons as diesel(reported as diesel range organics(DRO)in the analytical report) <br /> MtBE=Methyl tert-butyl ether <br /> TQC=Top of Casing <br /> DO=Dissolved oxygen <br /> logs=below ground surface <br /> ms!=mean sea level <br /> ,ug/L=micrograms per liter <br /> mg/L=milligrams per liter <br /> P/NP=purged/not purged <br /> <=below given laboratory detection limits <br /> Report Date:June 8,2004 Page 1 of 2 <br />