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• 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 /> 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) (pg1L) (pg/L) (iglL) MIL) (pg/L) (pglL) (Vg1L) (mg/L) Comments <br /> MW-6 5/19/1995 -- 1455 5259 -3804 96*** — <0 5 <05 <0 5 <0 5 NA -- No FP,No S <br /> 8/28/1995 -- 1455 5425 -3970 120 -- <0 5 <05 <0 5 <05 NA -- No FP,No S <br /> 12/7/1995 — 1455 5291 -3836 <200** -- <05 <05 <0 5 <05 NA -- No FP,No S <br /> 2/5/1996 -- 1455 5039 -3584 130 <0 5 <0 5 <0 5 <0 5 NA -- No FP No S <br /> 5/30/1996 1455 4738 -3283 140`** — <05 <0 5 <0 5 <0 5 <3 — No FP,No S <br /> 9/18/1996 -- 1455 5126 -3671 <200*** — <05 <0 5 <0 5 <0 5 <3 -- No FP,No S <br /> 11/2611996 -- 1455 4901 -3446 <200*** — <0 5 <0 5 <0 5 <0 5 <4** -- No FP,No S <br /> 3/24/1997 -- 1455 4397 -2942 <50 - <05 <0 5 <0 5 <0 5 <3 -- No FP No S <br /> 5/20/1997 — 1455 4452 -2997 180 -- <2** <0 5 <0 5 <0 5 <3 -- No FP,No S <br /> 8/19/1997 — 1455 4812 -3357 190 — <0 5 <0 5 <0 5 <0 5 <5 -- No FP,No S <br /> 11/19/1997 1455 4626 -3171 95 — 34 21 1 2 5 <5 — <br /> 3/4/1998 -- 1455 4163 -2708 60 — 1 6 <0 5 <0 5 <0 5 <5 No FP,No S <br /> 6/26/1998 — 1455 3933 -2478 101 -- 0 734 <0 5 <0 5 <0 5 <5 - <br /> 9/1/1998 -- 1455 4101 -2646 205 -- 0 684 <0 5 <0 5 <0 5 <5 — <br /> 12/2/1998 -- 1455 3842 -2387 124 — <0 5 <0 5 <0 5 <0 5 <5 - <br /> 3131/1999 -- 1455 3484 -2029 676 — 162 <0 5 <0 5 <0 5 <5 — <br /> 6/4/1999 -- 1455 3606 -21 51 118 — 177 <0 5 <05 <0 5 886 - <br /> 9/2/1999 -- 1455 4063 -2608 201 -- 284 <0 5 <0 5 <0 5 141 -- <br /> 11/29/1999 -- 1455 3878 -2423 53 — 0 839 <0 5 <0 5 <0 5 <25 -- <br /> 3/16/2000 — 1455 34 84 -2029 <50 -- <0 5 <0 5 <0 5 <0 5 <25 -- No FP,No S <br /> 6/26/2000 — 1455 3735 -2280 191 -- 129 <0 5 <0 5 <0 5 <2[2] — <br /> 9/28/2000 — 1455 4161 -2706 <50 — 2 5 <0 5 <0 5 <0 5 <2[2] — <br /> 12/19/2000 -- 1455 3739 -2284 <50 — 156 <0 5 <0 5 <0 5 <25 <br /> 3/15/2001 -- 1455 3514 -2059 <50 — <2[4] <2[4] <2[4) <2[4] <2[2] -- <br /> 6/20/2001 -- 1455 3835 -2380 <50 — <2[4] <2[4] <2[4] <2[4] <2[2] - <br /> 9/12/2001 -- 14 55 4268 -2813 <50 — <2[4] <2[4] <2[4] <2[4] <2[2] — <br /> 12/12/2001 — 1455 3950 -2495 73[6] -- <1 0[4] <1 0[4] <1 0[4] <1 0[4] <0 50[2] <br /> 3/13/2002 - 1455 3663 -2208 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] — <br /> 6/18/2002 — 1455 3874 -2419 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50121 — <br /> 9/11/2002 — 1455 4384 -2929 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50[2] <br /> 12/18/2002 — 1455 4132 -2677 71 -- <0 50 <0 50 <0 50 <0 50 <0 50[2) — <br /> 43/06/2003 P 1455 3900 -2445 200 -- <0 50 <0 50 1 <0 50 <0 50 <0 50[2] 147 <br /> 06/11/2003 P 14 55 3807 -2352 53 R -- <0 50 <0.50.—L <050 <0 50 <0 50[2] 4 27 <br /> Report Date May 12,2004 Page 11 of 19 <br />