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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 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) MIL) W/O (pg/L) (pg/L) (pg/L) (mg1L) Comments <br /> MS-1A 12/19/2002 -- — 4239 — NA -- NA NA NA NA NA -- <br /> 03/06/2003 P — 3886 - 240 -- 22 66 17 12 <0 50[2] 190 <br /> 06/11/2003 P — 3812 — 110 — 16 64 1 6 10 0 55[2] 686 <br /> 09/24/2003 P — 4215 — <50 — <0 50 <0 50 <0 50 <0 50 0 51[2] — <br /> 12/10/2003 P -- 4243 -- 120 — 16 18 37 24 0 58[2] — <br /> 03/09/2004 P — 3894 — 170 — 2 2 <0 50 <0 50 <0 50 7 7[2] 211 <br /> 06/24/2004 P — 4345 — <50 — 2 8 22 <0 50 2 0 <0 5012] 101 Water levels taken on <br /> 6123104 <br /> 09/20/2004 P — 4758 — <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 080 <br /> 12/20/2004 — — -- -- — — -- -- - — — -- Not Sampled <br /> 03/29/2005 P — 4225 — 65 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 180 Water levels taken on <br /> 03/28/2005 <br /> 06/20/2005 P — 41 58 — 200 J — 1 5 J 1 12 1 <0 50 1 19 1 <0 50[2] 1 140 jWater level taken 6119/05 <br /> MS-1 B 12/19/2002 — — 4196 — 82 — 10 <0 50 1 8 <0 50 <0 50[2] — <br /> 03/06/2003 P — 3900 — 510 — 93 10 46 21 <0 50[2] 130 <br /> 06/1112003 P — 3833 — 130 — 27 16 J <0 50 069 J <0 50[2] 315 <br /> 09/24/2003 P — 4230 -- <50 -- <0 50 <0 50 <0 50 <0 50 0 62[2] — <br /> 12/10/2003 P — 4199 120 — 14 15 31 20 0 57[2] — <br /> 03/09/2004 P — 3907 - 430 -- 2 5 <0 50 <0 50 <0 50 8 9[2] 2 96 <br /> 06/24/2004 P — 4338 — <50 UJ — 26 22 <0 50 1 9 <0 50(2] 096 Water levels taken on <br /> 6123/04 <br /> 09/20/2004 P — 4759 — <50 — 39 J 0 56 J <0 50 <0 50 <0 5012] 340 <br /> 12/20/2004 — — — — — — -- _ — - -- Not Sampled <br /> 03/29/2005 P — 4125 — <50 — 0 63 J <0 50 UJ <0 50 UJ <0 50 UJ <0 50 12) 340 Water levels taken on <br /> 03/28/2005 <br /> 106/20/20051 P 1 1 41 68 1 160 J I — 1 35 J 1 41 1 10 J 1 55 <0 50[2] 150 lWater level taken 6119105 <br /> MS-2A 12/19/2002 — — 4138 — <50 — <0 50 <0 50 <0 50 <0 50 0 79[2] — <br /> 03/06/2003 P — 3920 — 62 — 1 4 0 59 1 2 55 0 61[2] 4 0 <br /> 06/11/2003 P - 3880 - <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2]UJ 312 <br /> 09/2412003 P — 4281 — <50 — <0 50 <050 <0 50 <0 50 0 62[2] — <br /> 12/10/2003 P — 4141 — 150 — 18 20 37 25 0 60[2] — <br /> 03/09/2004 P -- 3926 -- 1,000 -- 33 <0 50 71 <0 50 3 8[2] 107 <br /> 06/23/2004 P — 44 04 — <50 - 0 52 <0 50 <0 50 <0 50 <0 50[2) 202 <br /> Report Date July 27, 2005 Page 9 of 23 <br />