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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) (pg1L) (pgll-) (oig1L) (PgIL) (pg/L) (pg/L) (pglL) (mg/L) Comments <br /> MW-1 03/09/2004 P 1458 3891 -2433 <50 — <0 50 <0 50 <0 50 <0 50 UJ <0 50[2] 207 <br /> 06/23/2004 P 1458 4370 -2912 <50 — <0 50 <050 <0 50 <0 50 <0 50[2] 311 <br /> 09/20/2004 P 1458 4784 -3326 <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 1 0 <br /> 12120/2004 P 1458 4446 -2988 <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 530 <br /> 03/28/2005 P 1458 4125 -2667 <50 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 530 <br /> 0611912005 P 1458 4150 -2692 <50 - <050 <0 50 <0 50 <0 50 1 0[2]J 570 <br /> MW-2 1!711992 -- 1519 4711 -3192 8,000 — 82 <60 48 170 NA — No FP,No S <br /> 2/24/1992 - 1519 61 59 -4640 NA — NA NA NA NA NA - No FP,No S <br /> 3/31/1992 — 1519 61 37 -4618 NA — NA NA NA NA NA — No FP No S <br /> 4/21/1992 - 1519 61 70 -4651 1 500 -- 16 <0 5 22 53 NA - No FP,No S <br /> 5/11/1992 - 1519 6236 -4717 NA — NA NA NA NA NA No FP,No S <br /> 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 /> 11/11/1992 — 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 <2 5 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 45 NA — No FP,NO S <br /> 3/23/1994 -- 1519 5514 -3995 1,200 — 14 77 69 52 NA — No FP,No S <br /> 6/22/1994 — 1519 5522 -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 /> 12/1/1994 — 1519 5800 -4281 220 — 21 <05 26 <0 5 NA — No FP,No S <br /> 2/28/1995 -- 1519 5508 -3989 110 -- <0 5 <05 <05 <0 5 NA — No FP,No S <br /> 5/19/1995 — 1519 5315 -3796 400 — 23 <05 21 <0 5 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(711995 — 1519 5347 -3828 540 — 18 <1. 3 <1. NA -- No FP,No S <br /> 2/5/1996 -- 1519 5193 -3674 310 — 28 06 13 0 8 NA — No FP,No S <br /> 5!3011996 — 15 19 4791 -3272 510 -- 31::]-- 1 59 13 <7— INo FP,No S <br /> Report Date July 27,2005 Page 5 of 23 <br />