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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) (pg/L) (pg/L) W/L) (pglL) (pg1L) (erg/L) (pg/L) (mglL) Comments <br /> MW-1 12/7/1995 -- 1458 5267 -3809 190 — 17 <0 5 <0 5 <0 5 NA -- No FP, No S <br /> 2/5/1996 -- 1458 5011 -3553 230 -- 2 5 <0 5 05 <0 5 NA - No FP,No S <br /> 5/30/1996 -- 1458 4717 -3259 180"* -- 1 2 <05 <0 5 <0 5 <4*" INo FP,No S <br /> 9/18/1996 — 1458 5096 -3638 200 -- 1 6 <05 <0 5 <0 5 <5" -- No FP,No S <br /> 11/26/1996 — 1458 4880 -3422 220 -- 1 5 <0 5 <0 5 <05 5 INo FP,No S <br /> 3/24/1997 -- 1458 4373 -2915 <50 — <0 5 <0 5 <0 5 <05 <3 -- No FP,No S <br /> 5/20/1997 -- 14 58 4432 -2974 230 -- <7" <0 6— <05 05 <5" — No FP,No S <br /> 8/19/1997 -- 1458 4778 -3320 200 -- 1 65 <05 <05 <0 5 <5 -- No FP No S <br /> 11/1911997 — 1458 4595 -3137 170 -- 7 077 <05 063 <5 — <br /> 3/4/1998 — 1458 4133 -2675 <50 -- 051 <0 5 <0 5 <0 5 <5 -- No FP,No S <br /> 6/26/1998 — 1458 3913 -2455 248 -- 1 73 <0 5 <0 5 <0 5 <5 — <br /> 9/1/1998 _ 1458 4089 -2631 249 — 519 <05 <0 5 <0 5 <5 -- <br /> 12/2/1998 — 1458 3820 -2362 227 -- <05 <0 5 <0 5 <0 5 127 -- <br /> 3/31/1999 — 1458 3468 -2010 152 -- <05 <05 <05 <0 5 <5 -- <br /> 6/4/1999 — 1458 3598 -2140 168 -- 263 <05 <0 5 <0 5 109 — <br /> 9/2/1999 — 1458 4049 -2591 232 -- 1 04 <0 5 <0 5 <0 5 <5 <br /> 11/29/1999 — 1458 3864 -2406 129 -- <0 5 <0 5 <0 5 <0 5 <2 5 — <br /> 3/16/2000 -- 1458 3466 -2008 552 — <05 <0 5 <0 5 <0 5 <2 5 — <br /> 6/26/2000 -- 1458 3726 -2268 175 -- <05 <05 <05 <0 5 1 <2[2] <br /> 9/28/2000 - 1458 4149 -2691 86 9[3] -- 214 <05 <0 5 <0 5 <2[2] — <br /> 12/19/2000 — 1458 37 17 -2259 <50 -- <0 5 <0 5 <0 5 <0 5 <25 -- <br /> 3/15/2001 1458 3500 -2042 <50 -- <2[4] <2[4] <2[4] <2[4] <2[2] - <br /> 6/20/2001 - 1458 3827 -2369 <50 -- <2[4] <2[4) <2[4] <2[4] <2[2] — <br /> 9/12/2001 -- 1458 4247 -2789 <50 _ <2[4] <2[4] <2[4] <2[4] <2[2] — <br /> 12/12/2001 — 1458 3936 -2478 <50 — <1 0[4] <1 0[4] <1 0[4] <1 0[4] 0 54[2] — <br /> 3/13/2002 -- 1458 3646 -2188 <50 -- <0 50 <0 50 <0 50 <050 <0 50[23 - <br /> 6/18/2002 -- 1458 3865 -2407 <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] <br /> 9/11/2002 1458 4373 -2915 <50 -- <0 50 e050 <0 50 <0 50 <0 50[2] - <br /> 12/18/2002 1458 4115 -2657 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] — <br /> 03/06/2003 P 1458 3884 -2426 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] 440 <br /> 06/11/2003 P 14 58 3812 -2354 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] 213 <br /> 09/23/2003 P 1458 4213 -2755 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] — <br /> 12/09/2003 P 14 5$ 41 18 -2660 <50 <0 50 <0 50 <0 50 <0 50 <0 50[2] -- <br /> Report Date July 27,2005 Page 4 of 23 <br /> I <br />