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Table 1 <br /> I Groundwater Elevation and.Analytical Data <br /> ARCO Service Station-No.-2130- - <br /> 7906 N. EL Dorado Street, Stockton, CA <br /> TQC 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 msi) (feet bgs) (feet msl) (pg/L) (pg/L) (p91L) (Irg/L) (IrgIL) (I.g/L) (pg/L) (mg/L) Comments <br /> MS-2A 03/29/2005 P - 41.62 - <50 -- 0.61 <0.50 <0.50 <0.50 <0.50[2] 3.6 Water levels taken on <br /> : . 03/2812005 <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] 3.1 <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 /> 12/10/2003 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 50.50 <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] 0.6 <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] 4.6 Water levels taken on <br /> 03/28/2005 <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] 1.8 <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 i 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 1 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] 4.1 Water levels taken on <br /> 03/28/2005 <br /> MS-3B 12/19/2002 - - 41.84 - 1,200 -- 26 1.4 27 <0.50 7.1[2] -- <br /> 03/06/2003 P 39.23 -- 1,100 -- 6.8 3.5 7.1 5.6 19[2] 2.0 <br /> i 06/11/2003 NP - 38.49 -- <50 - <0.50 <0.50 <0.50 <0.50 9.4[2]J 4.19 <br /> 09/24/2003 NP -- 42.53 -- <50 -- <0.50 <0.50 <0.50 <0.50 0.65[2] <br /> 1 211 0/2 003 P -- 41.86 - 190 -- 26 30 5.9 37 0,63[2] - <br /> 03/09/2004 -- - 39.28 -- 1,200 - 35 0.52 7.5 <0.50 3.2[2] <br /> 06/24/2004 NP - 43.21 - 120 -- <2.5 <2.5 <2.5 <2.5 <2.5[2] 1.92 Water levels taken on <br /> 6123104 <br /> 09/20/2004 P - 48.02 <50 - <2.5 <2.5 <2.5 <2.5 <2.5[2] 0.8 <br /> Report Date:April 25,2005 Page 2 of 23 <br />