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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 msi) (feet bgs) (feet msl) (ug1L) (ug/L) (pg1L) (pg1L) (pg1L) (pg1L) (pg1L) (mg1L) Comments <br /> MW-2 6/23/1992 — 1519 6244 -4725 NA — NA NA NA NA NA -- No FP,No S <br /> 7/8/1992 -- 1519 6366 -4847 2 100 — 140 36 27 45 NA — No FP No S <br /> 8/10/1992 — 1519 6458 -4939 NA - NA NA NA NA NA - No FP,No S <br /> 9/15/1992 — 1519 6522 -5003 NA — NA NA NA NA NA — No FP,No S <br /> 10/6/1992 -- 1519 6538 -5019 950 -- 90 54 12 79 NA -- No FP, No S <br /> 11111/1992 -- 1519 6469 -4950 NA NA NA NA NA NA — No FP,No S <br /> 12/4/1992 -- 1519 6396 -4877 NA - NA NA NA NA NA - No FP,No S <br /> 1/20/1993 -- 1519 6269 -4750 1,400 41 <25 24 64 NA -- No FP No S <br /> 3/22/1993 -- 1519 6079 -4560 NA NA NA NA NA NA -- No FP No S <br /> 4/6/1993 -- 1519 6027 -4508 1,000 -- 71 <2 5 31 88 NA — No FP,No S <br /> 7/30/1993 — 1519 6098 -4579 1 200 - 35 26 30 15 NA -- No FP No S <br /> 11/29/1993 — 1519 6005 -4486 1,100 — 28 33 18 4 5 NA -- No FP,No S <br /> 3/23/1994 -- 1519 5514 -3995 1200 -- 14 77 69 52 NA -- No FP No S <br /> 6/22/1994 - 1519 5622 -4003 1,200 -- 54 15 13 58 NA -- No FP No S <br /> 9/28/1994 -- 1519 5906 -4387 1,600 — 370 29 47 13 NA -- No FP,No S <br /> 12!111994 -- 1519 5800 -4281 220 — 21 <0 5 26 <0 5 NA -- No FP,No S <br /> 2128/1995 — 1519 5508 -3989 110 - <05 <05 <0 5 <0 5 NA -- No FP No S <br /> 5/19/1995 - 1519 5315 -3796 400 — 23 <0 5 21 <05 NA -- No FP,No S <br /> 8/28/1995 — 1519 5483 -3964 650 — 84 <1. 93 1 1 NA — No FP No S <br /> 12/7/1995 - 1519 5347 -3828 540 18 <1. 3 <J* NA -- No FP,No S <br /> 2/5/1996 — 1519 51 93 -3674 310 - 28 06 13 08 NA — No FP,No S <br /> 5/30/1996 — 1519 479 1 -3272 510 31 1 59 1 3 <7*' -- No FP,No S <br /> 9/18/1996 -- 1519 5180 -3661 920 150 <2 5* 22 35 <15* — No FP,No S <br /> 11/26/1996 -- 1519 4960 -3441 520 -- 21 <05 27 06 7 — No FP,No S <br /> 3/24/1997 - 1519 4450 -2931 <500*** -- <3*" <3** <3** <3** <20** NO FP,No S <br /> 5/20/1997 -- 1519 4509 -2990 720 — 71 <J* 13 1 1 <6* No FP, No S <br /> 8119/1997 -- 1519 4869 -3350 1,200 -- 240 <5 41 <5 <50** — No FP, No S <br /> 1111911997 — 1519 4677 -3158 <50 — 17 089 <0 5 087 <5 -- <br /> 3/4/1998 — 1519 42 18 -2699 <50 -- 22 <0 5 <0 5 <0 5 51 No FP No S <br /> 6/26/1998 - 1519 3987 -2468 534 -- 365 <0 5 <0 5 112 652 <br /> 9/1/1998 -- 1519 4161 -2642 322 484 <0 5 169 167 <5 — <br /> 12/2/1998 — 1519 3894 -2375 390 — <05 <05 0 735 <0 5 15 8 -- <br /> 3/31/1999 -- 15 19 3538 -2019 987 -- 66 069 0 579 233 655 — <br /> Report Date May 12,2004 Page 4 of 19 <br />