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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 P/ Elevation Water Elevation TPHg TPHd Benzene toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) MIL) (pglL) (pg/L) (Avg/L) (ugIL) (pg1L) MIL) (mg/L) Comments <br /> VW-1 12/20/2004 P — 4437 — 10 000 J — 094 <0 50 96 J 140 13[2] 050 <br /> 03/28/2005 P — 41 11 — 18,000 J — <050 <0 50 22 85 9 8[2] 090 <br /> 06/19/2005 P -- 41 96 — 5,400 J — <25 <2 5 35 J 130 4 8[2]J 090 <br /> VW-2 12/19/2002 — -- 41 00 — 120 12 <0 50 <0 50 <0 50 <0 50[2] — <br /> 03/06/2003 P — 3875 — 220 — 13 <0 50 <0 50 <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 <050 <0 50 <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 <0 50 <0 50 <0 50 <0 50[2] —249-- <br /> 06/24/2004 <br /> 4906/24/2004 P — 4388 — <50 — <050 <0 50 <0 50 <0 50 1 0[2) 117 Water levels taken on <br /> 6123104 <br /> 09/20/2004 P — 4785 — 180 -- 1 5 <0 50 <050 <0 50 <0 50[2] 090 <br /> 12/21/2004 P — 4441 — 260 — 1 1 <0 50 <0 50 <0 50 <0 50[2] 1 50 Water Level Data 12/20/04 <br /> 03/27/2005 P — 41 13 — 110 -- <2 5 <25 <2 5 <2 5 <2 5[2] 250 <br /> 06/19/2005 P — 41 55 — 120 J — 062 J <0 50 <0 50 <0 50 <0 50[2] 090 <br /> VW-3 12/19/2002 — -- 4158 -- <50 — 099 <050 38 1 8 9[2] — <br /> 03/06/2003 P — 3923 -- 120 — 12 <0 50 40 31 14[2] 140 <br /> 06111/2003 P — 3876 — <50 <0 50 <0 50 <0 50 <0 50 2 6[2] 4 56 <br /> 09/24/2003 P — 4274 -- <50 — <0 50 <0 50 <0 50 <0 50 5 4[2] — <br /> 12/10/2003 P — 4160 — 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 176 <br /> 06/24/2004 NP 4415 — <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 219 Water levels taken on <br /> 6123104 <br /> 09/20/2004 P — 4833 — 160 -- 098 <0 50 24 11 4 4[2] 080 <br /> 12/20/2004 P -- 4491 -- 370 J — 1 0 <0 50 3 8 14 0 69[2] 073 <br /> 03/28/2005 P 4168 — 150 — <0 50 <0 50 10 062 1 9[2] 0 30 <br /> 061 912 0 45 P — 4186 — 220 J <0 50 25 J 21 14[2]J 0 10 <br /> VW-4 12/19/2002 — — 4130 — 110 — 093 1 <0 50 <0 50 <0 50 <0 50[2] — <br /> 03/06/2003 P — 3908 — 280 - 1 7 <0 50 056 19 <0 50[2] 120 <br /> 06/11/2003 P — 3843 -- <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 250 <br /> 09/24/2003 P — 4745 — <50 — 050 <0 50 <0 50 <0 50 4 5[2] — <br /> 12/10/2003 P — 4133 — 120 — 20 22 44 29 <0 50[2] — <br /> Report Date July 27,2005 Page 18 of 23 <br />