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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No. 2130 <br /> 7906 N. EL Dorado 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) (Erg/L) (/ig/L) (pg1L) (dug/L) (Erg/L) (pg/L) (pg/L) (mg/L) Comments <br /> MS-1A 12/19/2002 -- - 42.39 - NA -- NA NA NA NA NA -- <br /> 03/06/2003 P -- 38.86 -- 240 22 6.6 1.7 12 <0.50[2] 1.90 <br /> 06/11/2003 P 38.12 -- 110 - 16 6.4 1.6 10 0.55[2] 6.86 <br /> 09/24/2003 P 42.15 - <50 -- <0.50 <0.50 <0.50 <0.50 0.51[2] - <br /> 12/10/2003 P - 42.43 -- 120 -- 16 18 3.7 24 0.58[2] - <br /> 03/09/2004 P - 38.94 -- 170 - 2.2 <0.50 <0.50 <0.50 7.7[2] 2.11 <br /> 06/24/2004 P -- 43.45 - <50 2.8 2.2 <0.50 2.0 <0.50[2] 1.01 Water levels taken on <br /> 6123104 <br /> 09/20/2004 P - 47.58 -- <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] 0.80 <br /> 17120/2004 -- - - - - - -- -- -- -- -- -- Not Sampled <br /> 03/29/2005 P - 42.25 - 65 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 1.80 Water levels taken on <br /> 03/28/2005 <br /> 06/20/2005 P - 41.58 - 200 J -- 1.5 J 1.2 <0.50 1.9 <0.50[2] 1.40 Water level taken 6119105 <br /> 09112/2005 P -- 45.99 - 200 - 2.2 0.89 0.63 2.7 <0.50[2] 1.80 Water levels taken on <br /> 9111/05 <br /> MS-16 12/19/2002 - - 41.96 - 82 -- 10 <0.50 1.8 <0.50 <0.50[2] -- <br /> 03/06/2003 P - 39.00 - 510 - 9.3 10 4.6 21 <0.50[2] 1.30 <br /> 06/11/2003 P - 38.33 - 130 -- 2.7 1.6 J <0.50 0.69 J <0.50[2] 3.15 <br /> 09/24/2003 P - 42.30 -- <50 -- <0.50 <0.50 <0.50 <0.50 0.62[2] -- <br /> 12/10/2003 P - 41.99 -- 120 - 14 15 3.1 20 0.57[2] - <br /> 03/09/2004 P - 39.07 - 430 -- 2.5 <0.50 <0.50 <0.50 8.9[2] 2.96 <br /> 06/24/2004 P - 43.38 - <50 UJ -- 2.6 2.2 <0.50 1.9 <0.50[2] 0.96 Water levels taken on <br /> 6123/04 <br /> 09/20/2004 P -- 47.59 -- <50 - 3.9 J 0.56 J <0.50 <0.50 <0.50[2] 3.40 <br /> 12/20/2004 N -- = -- - - -- -- -- - -- Not Sampled <br /> 03/29/2005 P 41.25 <50 0.63 J <0.50 UJ <0.50 UJ <0.50 UJ <0.50[2] 3.40 Water levels taken on <br /> 03/28/2005 <br /> 06/20/2005 P - 41.68 -- 160 J -- 3.5 J 4,1 1.0 J 5.5 <0.50[2] 1.50 Water level taken 6119/05 <br /> 09/12/2005 P 46.04 -- 290 -- 3.1 3.0 0.76 3.7 <0.50[2] 1.60 Water levels taken on <br /> :9111/05 <br /> MS-2A 12/19/2002 -- -- 41.38 - <50 i <0.50 <0.50 <0.50 <0.50 0.79[2] - <br /> 03/06/2003 P - 39.20 - 62 - 1.4 0.59 1.2 5.5 0,61[2] 4.0 <br /> 06/11/2003 P - 38.80 -- <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2]UJ 3.12 <br /> 09/24/2003 P -- 42.81 - <50 - <0.50 <0.50 <0.50 <0.50 0.62[2] - <br /> Report Date:October 21,2005 Pagel of 24 <br />