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l <br /> 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 PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (pg1L) (Erg1L) (,ug1L) (lig1L) (pg/L) (erg/L) (mg/L) Comments <br /> MS-2A 12/10/2003 P 41.41 - 150 -- 18 20 1 3.7 25 0.60[2] -- <br /> 03/09/2004 P 39.26 -- 1,000 -- 33 <0.50 7.1 <0.50 3.8[2] 1.07 <br /> 06/23/2004 P -- 44.04 - <50 - 0.52 <0.50 <0.50 <0.50 <0.50[2] 2.02 <br /> 09/20/2004 P 48.08 -- <50 -- 0.70 <0.50 <0.50 <0.50 <0.50[2] 2.70 <br /> 12/20/2004 -- -- -- - - - -- -- -- Not Sampled <br /> 03/29/2005 P -- 41.62 - <50 - 0.61 <0.50 <0.50 <0.50 <0.50[2] 3.60 Water levels taken on <br /> 03/28/2005 <br /> 06/20/2005 P - 41.74 -- <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] 2.80 Water level taken 6119105 <br /> 09/11/2005 P -- 45.18 -- 70 -- <0.50 <0.50 <0.50 0.69 <0.50[2] 3.20 <br /> MS-213 12/19/2002 -- - 41.42 -- 170 - 0.65 <0.50 <0.50 <0.50 <0.50[2] -- <br /> 03/06/2003 P - 39.16 - 87 -- 1.1 <0.50 0.99 4.6 <0.50[2] 3.10 <br /> 06/11/2003 NP 38.69 -- <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2]UJ 4.19 <br /> 09/24/2003 -- -- 42.61 - <50 - <0.50 <0.50 <0.50 <0.50 0.65[2] -- <br /> 1211012003 P 41.45 -- 110 -- 13 15 3.0 19 0.60[2] - <br /> 03/09/2004 P -- 39.23 -- 1,100 - 29 <0.50 6.4 <0.50 5.0[2] -- <br /> 06/23/2004 NP 43.97 - <50 0.50 <0.50 <0.50 <0.50 <0.50[2] 1.48 <br /> 09/20/2004 P - 48.14 -- <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] 0.60 <br /> 12/20/2004 -- -- -- -- - - - -- -- - -- Not Sampled <br /> 03/29/2005 P - 41.53 - <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] 4.60 Water levels taken on <br /> 03/28/2005 <br /> 06/20/2005 P -- 41.84 -- <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] 3.20 Water level taken 6119105 <br /> 109111120051 P 1 1 46.12 - <50 1 -- 1 <0.50 1 <0.50 <0.50 <0.50 <0.50[2] 3.40 <br /> MS-3A 12/19/2002 - - 41.26 -- 190 - 4 <0.50 <0.50 <0.50 <0.50[2] -- <br /> 03/06/2003 P -- 38.90 -- <50 - 2.2 1.0 1.0 4.7 0.90[2] 1.80 <br /> 06/11/2003 P - 38.15 - <50 - <0.50 <0.50 <0.50 <0.50 11 [2]J 3.77 <br /> 09/24/2003 P - 42.17 - <50 -- <0.50 <0.50 <0.50 <0.50 0.63[2] -- <br /> 12/10/2003 P -- 41.27 -- 140 -- 19 22 4.2 27 0.58[2] - <br /> 03/09/2004 P -- 37.93 -- 1,100 39 0.57 8.8 <0.50 2.9[2] 1.99 <br /> 06/23/2004 P - 44.15 -- <50 - 1.4 0.83 <0.50 <0.50 33[2] 3.81 <br /> 09/20/2004 P -- 48.36 - <50 -- 1.9 1.3 J <0.50 0.66 19[2] 4.0 <br /> 12/20/2004 -- - __ -- -- - -- - - -- - Not Sampled <br /> 03/29/2005 P -- 42.15 630 -- 27 <2.5 2.5 3.6 18[2] 4.10 Water levels taken on <br /> 03/28/2005 <br /> Report Date:October 21, 2005 Page 2 of 24 <br />