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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) (pg/L) WWI-) WWI-) (pg/L) (pg1L) (I.g/L) (pg1L) (mglL) Comments <br /> MW-6 03109!2004 P 14 55 3910 2455 64 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 244 <br /> 06/24/2004 P 1455 43 92 -2937 57 - <0 50 <0 50 <0 50 <0 50 <0 50[2] 1 51 Water levels taken on <br /> 09!2012044 P 6123/04 <br /> 14 55 48 08 -33 53 97 — <0 50 <0 50 <0 50 <0 50 <0 50[2] — <br /> 12/20/2004 P 1455 4454 2999 68 ,t — <0 50 <0 50 <0 50 <0 50 <0 50[2] 389 <br /> 03/29/2005 P 1455 4151 -2696 55 — <0 50 <0 50 <0 50 <0 50 <0 50[2] 240 Water levels taken on <br /> 06/1912005 P 1455 41 82 -2727 65 J — —<050 1 <0 50 <0 50 <0 Si--, <0 50[2) 270 03/28/2005 <br /> MW-7 12!4/1992 — -- 6251 — 88 — 2 <0 5 <0 5 <05 NA — No FP,No S <br /> 1/20/1993 — 1416 6095 46 79 NA — NA NA NA NA NA — No FP,No S <br /> 1/29/1993 -- -- — — 67 — <05 <05 <05 <0 5 NA — No FP,No S <br /> 3/22/1993 — 1416 5936 4520 NA NA NA NA NA NA — No FP,No S <br /> 4/6/1993 -- 1416 5884 4468 <50 — <6`* <05 <0 5 <0 5 NA — No FP,No S <br /> 7130/1993 -- 1416 5963 4547 <50 — <Q 5 <05 <05 <0 5 NA — No FP,No S <br /> 11129!1993 — 7i4-16 5862 4446 <50 — <05 <0 5 <0 5 <0 5 NA — No FP,No S <br /> 3/23/1994 -- 1416 5365 3949 130 — 88 11 17 83 NA -- No FP,No S <br /> 6/22/1994 -- 1416 5388 39 72 <10 — <03 04 <03 <0 5 NA -- No FP No S <br /> 9/28/1994 — 1416 5759 43 43 <50 — 12 1 1 <0 5 <05 NA — No FP,No S <br /> 12/1/1994 — 1416 5665 4249 <50 -- 69 35 <0 5 38 NA -- No FP,No S <br /> 2/28/1995 -- 1416 53 61 -39 45 <50 — <0 5 <0 5 <0 5 <0 5 NA — No FP,No S <br /> 511911995 — 1416 51 73 -3757 <50 — <0 5 <0 5 <05 <05 NA -- No FP,No S <br /> 8/28/1995 — 1416 53 51 -3935 <50 — <0 5 <05 <0 5 <0 5 NA — No FP,No S <br /> 12!711995 -- 1416 5210 -3794 <50 — <05 <05 <0 5 <0 5 NA — No FP No S <br /> 2/5/1996 — 1416 49 58 -.3542 <50 - <05 <0 5 <0 5 —<05 NA — No FP,No S <br /> 5/30/1996 — 1416 4665 -3249 <50 — <0 5 <05 <0 5 <0 5 <3 -- No FP,No S <br /> 9/18/1996 — 1416 5043 -3627 <50 — <05 <0 5 <05 <05 <3 — No FP,No S <br /> 11/26/1996 — 1416 4830 -3414 <50 — <0 5 <0 5 <0 5 <0 5 <3 — No FP,No S <br /> 3/24/1997 - 1416 4320 -2904 <200*** — <2" <05 <0 5 <0 5 <4** -- No FP,No S <br /> 15/20/1997 — 1416 4381 -2965 <50 — <05 <Q 5 <0 5 <0 5 <3 — No FP,No S <br /> 8/19/1997 — 1416 4725 -3309 <50 — <0 5 <0 5 <0 5 <05 <5 — No FP,No S <br /> 11/19/1997 — 1416 4542 -31 26 <50 — 26 29 0 8 45 <5 — <br /> 3/4/1998 -- 14 i 6 40 77 -26 61 <50 — <0 5 <0 5 <05 <05 <5 — No FP,No S <br /> 6/26/1998 — 14 16 38 57 -24 41 <50 -- <Q 5 <0 5 <0 5 <0 5 <5 — <br /> Report Date July 27,2005 Page 14 of 23 <br />