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! i i <br /> Table 1 <br /> 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 msl) (feet bgs) (feet msl) (pg/L) (pg/L) (pglL) (pg/L) (pg1L) (pg/L) (pg/L) (mp/L) Comments <br /> MS-2A 09/20/2004 P - 4808 — <50 — 070 <0 50 <0 50 <0 50 <0 50[2] 270 <br /> 12/20/2004 - - -- - - — -- -- — — -- -- Not Sampled <br /> 03/29/2005 P — 41 62 -- <50 — 061 <0 50 <0 50 <0 50 <0 50[2] 3 6Q Water levels taken on <br /> 03/28/2005 <br /> 06/20/2005 P 4174 1 -- <50 1 — I <0 50 1 <0 50 <0 50 <0 50..±:710-50[2) 280 Water level taken 6119105 <br /> MS-213 12/19/2002 -- I — 4142 -- 170 -- 065 <0 50 <0 50 <0 50 <0 50[21 — <br /> 03/06/2003 P — 3916 — 87 -- 1 1 <0 50 099 46 <0 50[2] 310 <br /> 06/11/2003 NP — 3869 -- <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2]UJ 419 <br /> 09/24/2003 — — 4261 — <50 — <0 50 <0 50 <0 50 <0 50 0 65[21 — <br /> 12/10/2003 P -- 4145 -- 110 -- 13 15 30 19 0 60[2] -- <br /> 03/09/2004 P — 3923 — 1,100 - 29 <0 50 64 <0 50 5 0[2] — <br /> 06/23/2004 NP — 4397 -- <50 -- 050 <0 50 <0 50 <0 50 <0 50[2] 148 <br /> 09/20/2004 P -- 4814 -- <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 060 <br /> 12/20/2004 -- — -- -- — — -- -- -- — — — Not Sampled <br /> 03/29/2005 P -- 4153 -- <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 460 Water levels taken on <br /> 03/2812005 <br /> 0&2012005 P •- 41 84 -• <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 320 lWater level taken 6/19105 <br /> MS-3A 12/19/2002 - — 4126 — 190 — 4 <0 50 <0 50 <0 50 <0 50[2] — <br /> 03/06/2003 P — 3890 — <50 — 22 10 10 47 0 90[2] 1 BO <br /> 06/11/2003 P -- 3815 — <50 — <0 50 <0 50 <0 50 <0 50 11 [2]J 377 <br /> 09/24/2003 P -- 4217 - <50 — <0 50 <0 50 <0 50 <0 50 0 63[2] — <br /> 12/10/2003 P — 4127 — 140 — 19 22 42 27 0 58[2] -- <br /> 03/09/2004 P i — 3793 — 1,100 -- 39 057 88 <0 50 2 9[2] 1 99 <br /> 06/23/2004 P — 4415 <50 -- 14 083 <050 <0 50 33[2] 381 <br /> 09/20/2004 P — 48 36 - <50 •- 19 1 3 J <0 50 066 19[2] 4 0 <br /> 12/20/2004 -- -- -- I -- -- -- I -- -- -- -- — I — Not Sampled <br /> 03/29/2005 P -- 4215 -- 630 -- 27 <25 25 36 18[2] 410 Water levels taken on <br /> 03/28/2005 <br /> 06120/2005 P — 4207 — 380 — 51 059 1 5 085 71[21 390 Water level taken 6/19105 <br /> MS-3B 12/19/2002 -- -- 4184 -- 1,200 — 26 14 27 <050 71[2] -- <br /> 03/06/2003 P — 3923 — 1,100 — 68 3 5 71 56 19[2) 2 0 <br /> 06/11/2003 NP -- 3849 -- <50 _ <0 50 <0 50 <0 50 <0 50 9 4[2]J 419 <br /> Report Date July 27,2005 Page 2 of 23 <br />