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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 msl) (feet bgs) (feet msl) U41-) (frg/L) (Ng/L) (U9/L) (frg/L) (AIL) (pg/L) (mg/L) Comments <br /> VW-2 12/19/2002 41 00 120 - 1 2 <0 50 <050 <050 <0 50[2] -- <br /> 03/06/2003 P 3875 220 1 3 <050 <050 <0 50 <0 50[2] 115 <br /> 06/11/2003 P 3808 53 <0 50 <0 50 <0 50 <0 50 <0 50[2] 301 <br /> 09/24/2003 P 4212 110 - 092 <0 50 <050 <0 50 <0 50[2] -- <br /> 12/10/2003 P 4098 300 13 <0 50 <0 50 <0 50 <0 50[2] - <br /> 03/08/2004 P 3883 93 078 <050 <0 50 <0 50 <0 50[2] 249 <br /> 06/24/2004 P 4388 <50 <050 <050 <0 50 <0 50 1 0[2] 1 1 17 Water levels taken on <br /> 6/23/04 <br /> 09/20/2004 P 4785 180 -- 1 5 <0 50 <0 50 <0 50 <0 50[2] 09 <br /> 12/21/2004 P 4441 260 11 <050 <0 50 <0 50 <0 50[2] 1 5 Water Level Data 12/20/04 <br /> 03/27/2005 P 4113 110 <2 5 <2 5 <2 5 <25 <2 5[2) 25 <br /> 06/19/2005 P 41 55 120 J 0 62 J <0 50 <0 50 <0 50 <0 50[2] 09 <br /> 09/11/2005 P 4611 64 095 <0 50 <0 50 <0 50 <0 50[2] 10 <br /> 12111/2005 P — 4255 — 180 -- 093 J <0 50 <050 <0 50 <0 50[2] 10 <br /> VW 3 12/19/2002 41 58 <50 099 <0 50 38 1 8 9[2] - <br /> 03/06/2003 P 3923 120 1 2 <050 40 31 14[21 1 4 <br /> 06/11/2003 P 3876 <50 <0 50 <0 50 <050 <0 50 2 6[2] 456 <br /> 09/24/2003 P 4274 <50 <050 <050 <0 50 <050 5 4[2] - <br /> 1 211 0/2 0 03 P 41 60 78 1 1 <0 50 <0 50 <0 50 5 0[2] - <br /> 03/08/2004 P 3930 580 056 J <0 50 66 J 37 J 19[2]J 1 76 <br /> 06/24/2004 NP 4415 <50 <0 50 <0 50 <050 <0 50 <0 50[2] 219 Water levels taken on <br /> 6123104 <br /> 09/20/2004 P 4833 160 - 098 <050 24 1 1 4 4[2] 08 <br /> 12/20/2004 P 4491 370 J 1 0 <0 50 38 1 4 0 69[2) 073 <br /> 03/28/2005 P 41 68 150 <0 50 <0 50 1 0 062 1 9[2] 03 <br /> 06/19/2005 P 41 86 220 J 058 J <0 50 25 J 21 1 4[2]J 01 <br /> 09/11/2005 P 4652 370 1 0 <0 50 71 37 1 0[2] 04 <br /> 12/11/2005 P -- 43 37 -- 310 -- 095 J <050 1 6 099 1 <0 50[2] 09 <br /> VW 4 12/19/2002 4130 110 0 93 <050 <050 <0 50 <0 50[2] - <br /> 03/06/2003 P 3906 280 1 7 <050 056 1 9 <0 50[2] 1 2 <br /> 06/11/2003 P 3643 <50 <0 50 <050 <050 <050 <0 50[2] 25 <br /> 09/24/2003 P 4745 <50 050 <050 <050 <0 50 4 5[2] - <br /> 12/10/2003 P 41 33 120 20 22 44 29 <0 50[2] <br /> Report Date January 25,2006 Page 19 of 25 <br />