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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 /> TOG 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) (pg1L) (pg/L-) (pg1L) (pug/L) (pg1L) (pg/L) ({rg/L) (mg/L) Comments <br /> MS-213 06/23/2004 NP — 4397 — <50 — 0 50 <0 50 <0 50 <0 50 <0 50[2] 148 <br /> 0912012004 P -- 4814 — <50 — <0 50 <0 5o <0 50 <0 50 <0 50[2] 06 <br /> MS-3A 12/19/2002 - — 41 26 — 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] 18 <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 — <050 <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 — 37 93 — 1,100 - 39 057 8 8 <0 50 2 9[2] 199 <br /> 06/23/2004 P — 4415 — <50 — 14 083 <0 50 <0 50 33[2] 3 81 <br /> 0912012004 P — 48 36 — <50 — 1 9 13 J <0.50 066 19[2] 40 <br /> MS-313 12/19/2002 -- 4184 — 1,200 — 26 14 27 <0 50 7 1[2] -- <br /> 03/06/2003 P -- 3923 — 1,100 68 35 71 56 19[2] 20 <br /> 06/11/2003 NP -- 3849 — <50 — <0 50 <050 <0 50 <050 9 4[2]J 419 <br /> 09/24/2003 NP - 4253 — <50 — <0 50 <0 50 <0 50 <0 50 0 65[2] — <br /> 12110/2003 P — 4186 190 — 26 30 59 37 0 63[2] — <br /> 03/09/2004 — — 3928 -- 1,200 - 35 052 75 <0 50 3 2[2] — <br /> 06/24/2004 j Nl — 43 2i — 120 - <25 <25 <2 5 <2 5 <2 5[2) 192 Water levels taken on <br /> 6123104 <br /> 109120/20041 P -- 4802 <50 — <25 <2 5 <2 5 <2 5 <2 5[2] 08 <br /> MW-1 1/7/1992 — 14 58 6148 -4690 18 000 — 1,600 610 140 85 NA — Na FP,No S <br /> 2/24/1992 - 1458 6076 �6 18 NA -- NA NA NA NA NA — No FP,No S <br /> 3/31/1992 — 1458 6056 -4533 NA — NA NA NA NA NA — No FP No S <br /> 4/21/1992 -- 14.58 6091 -4633 5,200 1,400 360 53 260 NA — No FP,No S <br /> 5/11/1992 — 1458 61 57 -4699 NA -- NA NA NA NA NA -- No FP,No S <br /> 6/23/1992 — 14 58 61 68 -47 10 NA — NA NA NA NA NA — No FP,No S <br /> 7/8/1992 — 1458 6284 -4826 6,500 1,900 320 89 230 NA -- No FP,No S <br /> 8/10/1992 — 1458 6374 -4916 NA — NA NA NA NA NA — No FP,No S <br /> 9/15/1992 - 1458 6437 -4979 NA -- NA NA NA NA NA INo FP,No S <br /> 10/6/1992 — 1458 6452 -4994 11,000 — 2,500 600 210 470 NA -- No FP,No S <br /> 11/11/1992 — 1458 6383 -4925 NA — NA NA NA NA NA — No FP,No S <br /> 12/4/1992 -- 14 58 63 10 -48 52 NA — NANA NA NA NA -- No FP,No S <br /> 1/20/1993 — i4 58 <br /> 6183 -4725 1 800 — 260 100 10 34 NA — No FP,No S <br /> Page 2 of 21 <br /> Report Date October 25,2004 <br />